Return-path: Received: from mx1.redhat.com ([209.132.183.28]:45741 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756792Ab1KRIWe (ORCPT ); Fri, 18 Nov 2011 03:22:34 -0500 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id pAI8MYjq022789 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 18 Nov 2011 03:22:34 -0500 From: Stanislaw Gruszka To: linux-wireless@vger.kernel.org Cc: Stanislaw Gruszka Subject: [PATCH 48/77] iwlegacy: merge common .c files Date: Fri, 18 Nov 2011 09:22:10 +0100 Message-Id: <1321604559-10707-48-git-send-email-sgruszka@redhat.com> (sfid-20111118_092246_088326_70721153) In-Reply-To: <1321604559-10707-1-git-send-email-sgruszka@redhat.com> References: <1321604559-10707-1-git-send-email-sgruszka@redhat.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: Merge iwl-{tx,rx,sta,scan,power,eeprom,led,hcmd}.c into common.c . Signed-off-by: Stanislaw Gruszka --- drivers/net/wireless/iwlegacy/Makefile | 4 +- drivers/net/wireless/iwlegacy/common.c | 3146 ++++++++++++++++++++++++++++ drivers/net/wireless/iwlegacy/iwl-eeprom.c | 553 ----- drivers/net/wireless/iwlegacy/iwl-hcmd.c | 271 --- drivers/net/wireless/iwlegacy/iwl-led.c | 205 -- drivers/net/wireless/iwlegacy/iwl-power.c | 165 -- drivers/net/wireless/iwlegacy/iwl-rx.c | 281 --- drivers/net/wireless/iwlegacy/iwl-scan.c | 545 ----- drivers/net/wireless/iwlegacy/iwl-tx.c | 655 ------ 9 files changed, 3147 insertions(+), 2678 deletions(-) delete mode 100644 drivers/net/wireless/iwlegacy/iwl-eeprom.c delete mode 100644 drivers/net/wireless/iwlegacy/iwl-hcmd.c delete mode 100644 drivers/net/wireless/iwlegacy/iwl-led.c delete mode 100644 drivers/net/wireless/iwlegacy/iwl-power.c delete mode 100644 drivers/net/wireless/iwlegacy/iwl-rx.c delete mode 100644 drivers/net/wireless/iwlegacy/iwl-scan.c delete mode 100644 drivers/net/wireless/iwlegacy/iwl-tx.c diff --git a/drivers/net/wireless/iwlegacy/Makefile b/drivers/net/wireless/iwlegacy/Makefile index 0f51f9d..413213b 100644 --- a/drivers/net/wireless/iwlegacy/Makefile +++ b/drivers/net/wireless/iwlegacy/Makefile @@ -1,7 +1,5 @@ obj-$(CONFIG_IWLEGACY) += iwl-legacy.o -iwl-legacy-objs := common.o iwl-eeprom.o iwl-hcmd.o iwl-power.o -iwl-legacy-objs += iwl-rx.o iwl-tx.o iwl-sta.o -iwl-legacy-objs += iwl-scan.o iwl-led.o +iwl-legacy-objs := common.o iwl-legacy-$(CONFIG_IWLEGACY_DEBUGFS) += iwl-debugfs.o iwl-legacy-objs += $(iwl-legacy-m) diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c index 856a321..7062574 100644 --- a/drivers/net/wireless/iwlegacy/common.c +++ b/drivers/net/wireless/iwlegacy/common.c @@ -31,6 +31,13 @@ #include #include #include +#include +#include +#include +#include +#include +#include +#include #include #include "iwl-eeprom.h" @@ -42,6 +49,3145 @@ #include "iwl-sta.h" #include "iwl-helpers.h" +const char *il_get_cmd_string(u8 cmd) +{ + switch (cmd) { + IL_CMD(N_ALIVE); + IL_CMD(N_ERROR); + IL_CMD(C_RXON); + IL_CMD(C_RXON_ASSOC); + IL_CMD(C_QOS_PARAM); + IL_CMD(C_RXON_TIMING); + IL_CMD(C_ADD_STA); + IL_CMD(C_REM_STA); + IL_CMD(C_WEPKEY); + IL_CMD(N_3945_RX); + IL_CMD(C_TX); + IL_CMD(C_RATE_SCALE); + IL_CMD(C_LEDS); + IL_CMD(C_TX_LINK_QUALITY_CMD); + IL_CMD(C_CHANNEL_SWITCH); + IL_CMD(N_CHANNEL_SWITCH); + IL_CMD(C_SPECTRUM_MEASUREMENT); + IL_CMD(N_SPECTRUM_MEASUREMENT); + IL_CMD(C_POWER_TBL); + IL_CMD(N_PM_SLEEP); + IL_CMD(N_PM_DEBUG_STATS); + IL_CMD(C_SCAN); + IL_CMD(C_SCAN_ABORT); + IL_CMD(N_SCAN_START); + IL_CMD(N_SCAN_RESULTS); + IL_CMD(N_SCAN_COMPLETE); + IL_CMD(N_BEACON); + IL_CMD(C_TX_BEACON); + IL_CMD(C_TX_PWR_TBL); + IL_CMD(C_BT_CONFIG); + IL_CMD(C_STATS); + IL_CMD(N_STATS); + IL_CMD(N_CARD_STATE); + IL_CMD(N_MISSED_BEACONS); + IL_CMD(C_CT_KILL_CONFIG); + IL_CMD(C_SENSITIVITY); + IL_CMD(C_PHY_CALIBRATION); + IL_CMD(N_RX_PHY); + IL_CMD(N_RX_MPDU); + IL_CMD(N_RX); + IL_CMD(N_COMPRESSED_BA); + default: + return "UNKNOWN"; + + } +} +EXPORT_SYMBOL(il_get_cmd_string); + +#define HOST_COMPLETE_TIMEOUT (HZ / 2) + +static void il_generic_cmd_callback(struct il_priv *il, + struct il_device_cmd *cmd, + struct il_rx_pkt *pkt) +{ + if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { + IL_ERR("Bad return from %s (0x%08X)\n", + il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); + return; + } + +#ifdef CONFIG_IWLEGACY_DEBUG + switch (cmd->hdr.cmd) { + case C_TX_LINK_QUALITY_CMD: + case C_SENSITIVITY: + D_HC_DUMP("back from %s (0x%08X)\n", + il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); + break; + default: + D_HC("back from %s (0x%08X)\n", + il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); + } +#endif +} + +static int +il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd) +{ + int ret; + + BUG_ON(!(cmd->flags & CMD_ASYNC)); + + /* An asynchronous command can not expect an SKB to be set. */ + BUG_ON(cmd->flags & CMD_WANT_SKB); + + /* Assign a generic callback if one is not provided */ + if (!cmd->callback) + cmd->callback = il_generic_cmd_callback; + + if (test_bit(S_EXIT_PENDING, &il->status)) + return -EBUSY; + + ret = il_enqueue_hcmd(il, cmd); + if (ret < 0) { + IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", + il_get_cmd_string(cmd->id), ret); + return ret; + } + return 0; +} + +int il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd) +{ + int cmd_idx; + int ret; + + lockdep_assert_held(&il->mutex); + + BUG_ON(cmd->flags & CMD_ASYNC); + + /* A synchronous command can not have a callback set. */ + BUG_ON(cmd->callback); + + D_INFO("Attempting to send sync command %s\n", + il_get_cmd_string(cmd->id)); + + set_bit(S_HCMD_ACTIVE, &il->status); + D_INFO("Setting HCMD_ACTIVE for command %s\n", + il_get_cmd_string(cmd->id)); + + cmd_idx = il_enqueue_hcmd(il, cmd); + if (cmd_idx < 0) { + ret = cmd_idx; + IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", + il_get_cmd_string(cmd->id), ret); + goto out; + } + + ret = wait_event_timeout(il->wait_command_queue, + !test_bit(S_HCMD_ACTIVE, &il->status), + HOST_COMPLETE_TIMEOUT); + if (!ret) { + if (test_bit(S_HCMD_ACTIVE, &il->status)) { + IL_ERR( + "Error sending %s: time out after %dms.\n", + il_get_cmd_string(cmd->id), + jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); + + clear_bit(S_HCMD_ACTIVE, &il->status); + D_INFO( + "Clearing HCMD_ACTIVE for command %s\n", + il_get_cmd_string(cmd->id)); + ret = -ETIMEDOUT; + goto cancel; + } + } + + if (test_bit(S_RF_KILL_HW, &il->status)) { + IL_ERR("Command %s aborted: RF KILL Switch\n", + il_get_cmd_string(cmd->id)); + ret = -ECANCELED; + goto fail; + } + if (test_bit(S_FW_ERROR, &il->status)) { + IL_ERR("Command %s failed: FW Error\n", + il_get_cmd_string(cmd->id)); + ret = -EIO; + goto fail; + } + if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) { + IL_ERR("Error: Response NULL in '%s'\n", + il_get_cmd_string(cmd->id)); + ret = -EIO; + goto cancel; + } + + ret = 0; + goto out; + +cancel: + if (cmd->flags & CMD_WANT_SKB) { + /* + * Cancel the CMD_WANT_SKB flag for the cmd in the + * TX cmd queue. Otherwise in case the cmd comes + * in later, it will possibly set an invalid + * address (cmd->meta.source). + */ + il->txq[il->cmd_queue].meta[cmd_idx].flags &= + ~CMD_WANT_SKB; + } +fail: + if (cmd->reply_page) { + il_free_pages(il, cmd->reply_page); + cmd->reply_page = 0; + } +out: + return ret; +} +EXPORT_SYMBOL(il_send_cmd_sync); + +int il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd) +{ + if (cmd->flags & CMD_ASYNC) + return il_send_cmd_async(il, cmd); + + return il_send_cmd_sync(il, cmd); +} +EXPORT_SYMBOL(il_send_cmd); + +int +il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data) +{ + struct il_host_cmd cmd = { + .id = id, + .len = len, + .data = data, + }; + + return il_send_cmd_sync(il, &cmd); +} +EXPORT_SYMBOL(il_send_cmd_pdu); + +int il_send_cmd_pdu_async(struct il_priv *il, + u8 id, u16 len, const void *data, + void (*callback)(struct il_priv *il, + struct il_device_cmd *cmd, + struct il_rx_pkt *pkt)) +{ + struct il_host_cmd cmd = { + .id = id, + .len = len, + .data = data, + }; + + cmd.flags |= CMD_ASYNC; + cmd.callback = callback; + + return il_send_cmd_async(il, &cmd); +} +EXPORT_SYMBOL(il_send_cmd_pdu_async); + +/* default: IL_LED_BLINK(0) using blinking idx table */ +static int led_mode; +module_param(led_mode, int, S_IRUGO); +MODULE_PARM_DESC(led_mode, "0=system default, " + "1=On(RF On)/Off(RF Off), 2=blinking"); + +/* Throughput OFF time(ms) ON time (ms) + * >300 25 25 + * >200 to 300 40 40 + * >100 to 200 55 55 + * >70 to 100 65 65 + * >50 to 70 75 75 + * >20 to 50 85 85 + * >10 to 20 95 95 + * >5 to 10 110 110 + * >1 to 5 130 130 + * >0 to 1 167 167 + * <=0 SOLID ON + */ +static const struct ieee80211_tpt_blink il_blink[] = { + { .throughput = 0, .blink_time = 334 }, + { .throughput = 1 * 1024 - 1, .blink_time = 260 }, + { .throughput = 5 * 1024 - 1, .blink_time = 220 }, + { .throughput = 10 * 1024 - 1, .blink_time = 190 }, + { .throughput = 20 * 1024 - 1, .blink_time = 170 }, + { .throughput = 50 * 1024 - 1, .blink_time = 150 }, + { .throughput = 70 * 1024 - 1, .blink_time = 130 }, + { .throughput = 100 * 1024 - 1, .blink_time = 110 }, + { .throughput = 200 * 1024 - 1, .blink_time = 80 }, + { .throughput = 300 * 1024 - 1, .blink_time = 50 }, +}; + +/* + * Adjust led blink rate to compensate on a MAC Clock difference on every HW + * Led blink rate analysis showed an average deviation of 0% on 3945, + * 5% on 4965 HW. + * Need to compensate on the led on/off time per HW according to the deviation + * to achieve the desired led frequency + * The calculation is: (100-averageDeviation)/100 * blinkTime + * For code efficiency the calculation will be: + * compensation = (100 - averageDeviation) * 64 / 100 + * NewBlinkTime = (compensation * BlinkTime) / 64 + */ +static inline u8 il_blink_compensation(struct il_priv *il, + u8 time, u16 compensation) +{ + if (!compensation) { + IL_ERR("undefined blink compensation: " + "use pre-defined blinking time\n"); + return time; + } + + return (u8)((time * compensation) >> 6); +} + +/* Set led pattern command */ +static int il_led_cmd(struct il_priv *il, + unsigned long on, + unsigned long off) +{ + struct il_led_cmd led_cmd = { + .id = IL_LED_LINK, + .interval = IL_DEF_LED_INTRVL + }; + int ret; + + if (!test_bit(S_READY, &il->status)) + return -EBUSY; + + if (il->blink_on == on && il->blink_off == off) + return 0; + + if (off == 0) { + /* led is SOLID_ON */ + on = IL_LED_SOLID; + } + + D_LED("Led blink time compensation=%u\n", + il->cfg->base_params->led_compensation); + led_cmd.on = il_blink_compensation(il, on, + il->cfg->base_params->led_compensation); + led_cmd.off = il_blink_compensation(il, off, + il->cfg->base_params->led_compensation); + + ret = il->cfg->ops->led->cmd(il, &led_cmd); + if (!ret) { + il->blink_on = on; + il->blink_off = off; + } + return ret; +} + +static void il_led_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct il_priv *il = container_of(led_cdev, struct il_priv, led); + unsigned long on = 0; + + if (brightness > 0) + on = IL_LED_SOLID; + + il_led_cmd(il, on, 0); +} + +static int il_led_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + struct il_priv *il = container_of(led_cdev, struct il_priv, led); + + return il_led_cmd(il, *delay_on, *delay_off); +} + +void il_leds_init(struct il_priv *il) +{ + int mode = led_mode; + int ret; + + if (mode == IL_LED_DEFAULT) + mode = il->cfg->led_mode; + + il->led.name = kasprintf(GFP_KERNEL, "%s-led", + wiphy_name(il->hw->wiphy)); + il->led.brightness_set = il_led_brightness_set; + il->led.blink_set = il_led_blink_set; + il->led.max_brightness = 1; + + switch (mode) { + case IL_LED_DEFAULT: + WARN_ON(1); + break; + case IL_LED_BLINK: + il->led.default_trigger = + ieee80211_create_tpt_led_trigger(il->hw, + IEEE80211_TPT_LEDTRIG_FL_CONNECTED, + il_blink, ARRAY_SIZE(il_blink)); + break; + case IL_LED_RF_STATE: + il->led.default_trigger = + ieee80211_get_radio_led_name(il->hw); + break; + } + + ret = led_classdev_register(&il->pci_dev->dev, &il->led); + if (ret) { + kfree(il->led.name); + return; + } + + il->led_registered = true; +} +EXPORT_SYMBOL(il_leds_init); + +void il_leds_exit(struct il_priv *il) +{ + if (!il->led_registered) + return; + + led_classdev_unregister(&il->led); + kfree(il->led.name); +} +EXPORT_SYMBOL(il_leds_exit); + +/************************** EEPROM BANDS **************************** + * + * The il_eeprom_band definitions below provide the mapping from the + * EEPROM contents to the specific channel number supported for each + * band. + * + * For example, il_priv->eeprom.band_3_channels[4] from the band_3 + * definition below maps to physical channel 42 in the 5.2GHz spectrum. + * The specific geography and calibration information for that channel + * is contained in the eeprom map itself. + * + * During init, we copy the eeprom information and channel map + * information into il->channel_info_24/52 and il->channel_map_24/52 + * + * channel_map_24/52 provides the idx in the channel_info array for a + * given channel. We have to have two separate maps as there is channel + * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and + * band_2 + * + * A value of 0xff stored in the channel_map indicates that the channel + * is not supported by the hardware at all. + * + * A value of 0xfe in the channel_map indicates that the channel is not + * valid for Tx with the current hardware. This means that + * while the system can tune and receive on a given channel, it may not + * be able to associate or transmit any frames on that + * channel. There is no corresponding channel information for that + * entry. + * + *********************************************************************/ + +/* 2.4 GHz */ +const u8 il_eeprom_band_1[14] = { + 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 +}; + +/* 5.2 GHz bands */ +static const u8 il_eeprom_band_2[] = { /* 4915-5080MHz */ + 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16 +}; + +static const u8 il_eeprom_band_3[] = { /* 5170-5320MHz */ + 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 +}; + +static const u8 il_eeprom_band_4[] = { /* 5500-5700MHz */ + 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 +}; + +static const u8 il_eeprom_band_5[] = { /* 5725-5825MHz */ + 145, 149, 153, 157, 161, 165 +}; + +static const u8 il_eeprom_band_6[] = { /* 2.4 ht40 channel */ + 1, 2, 3, 4, 5, 6, 7 +}; + +static const u8 il_eeprom_band_7[] = { /* 5.2 ht40 channel */ + 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157 +}; + +/****************************************************************************** + * + * EEPROM related functions + * +******************************************************************************/ + +static int il_eeprom_verify_signature(struct il_priv *il) +{ + u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK; + int ret = 0; + + D_EEPROM("EEPROM signature=0x%08x\n", gp); + switch (gp) { + case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K: + case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K: + break; + default: + IL_ERR("bad EEPROM signature," + "EEPROM_GP=0x%08x\n", gp); + ret = -ENOENT; + break; + } + return ret; +} + +const u8 +*il_eeprom_query_addr(const struct il_priv *il, size_t offset) +{ + BUG_ON(offset >= il->cfg->base_params->eeprom_size); + return &il->eeprom[offset]; +} +EXPORT_SYMBOL(il_eeprom_query_addr); + +u16 il_eeprom_query16(const struct il_priv *il, size_t offset) +{ + if (!il->eeprom) + return 0; + return (u16)il->eeprom[offset] | ((u16)il->eeprom[offset + 1] << 8); +} +EXPORT_SYMBOL(il_eeprom_query16); + +/** + * il_eeprom_init - read EEPROM contents + * + * Load the EEPROM contents from adapter into il->eeprom + * + * NOTE: This routine uses the non-debug IO access functions. + */ +int il_eeprom_init(struct il_priv *il) +{ + __le16 *e; + u32 gp = _il_rd(il, CSR_EEPROM_GP); + int sz; + int ret; + u16 addr; + + /* allocate eeprom */ + sz = il->cfg->base_params->eeprom_size; + D_EEPROM("NVM size = %d\n", sz); + il->eeprom = kzalloc(sz, GFP_KERNEL); + if (!il->eeprom) { + ret = -ENOMEM; + goto alloc_err; + } + e = (__le16 *)il->eeprom; + + il->cfg->ops->lib->apm_ops.init(il); + + ret = il_eeprom_verify_signature(il); + if (ret < 0) { + IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp); + ret = -ENOENT; + goto err; + } + + /* Make sure driver (instead of uCode) is allowed to read EEPROM */ + ret = il->cfg->ops->lib->eeprom_ops.acquire_semaphore(il); + if (ret < 0) { + IL_ERR("Failed to acquire EEPROM semaphore.\n"); + ret = -ENOENT; + goto err; + } + + /* eeprom is an array of 16bit values */ + for (addr = 0; addr < sz; addr += sizeof(u16)) { + u32 r; + + _il_wr(il, CSR_EEPROM_REG, + CSR_EEPROM_REG_MSK_ADDR & (addr << 1)); + + ret = _il_poll_bit(il, CSR_EEPROM_REG, + CSR_EEPROM_REG_READ_VALID_MSK, + CSR_EEPROM_REG_READ_VALID_MSK, + IL_EEPROM_ACCESS_TIMEOUT); + if (ret < 0) { + IL_ERR("Time out reading EEPROM[%d]\n", + addr); + goto done; + } + r = _il_rd(il, CSR_EEPROM_REG); + e[addr / 2] = cpu_to_le16(r >> 16); + } + + D_EEPROM("NVM Type: %s, version: 0x%x\n", + "EEPROM", + il_eeprom_query16(il, EEPROM_VERSION)); + + ret = 0; +done: + il->cfg->ops->lib->eeprom_ops.release_semaphore(il); + +err: + if (ret) + il_eeprom_free(il); + /* Reset chip to save power until we load uCode during "up". */ + il_apm_stop(il); +alloc_err: + return ret; +} +EXPORT_SYMBOL(il_eeprom_init); + +void il_eeprom_free(struct il_priv *il) +{ + kfree(il->eeprom); + il->eeprom = NULL; +} +EXPORT_SYMBOL(il_eeprom_free); + +static void il_init_band_reference(const struct il_priv *il, + int eep_band, int *eeprom_ch_count, + const struct il_eeprom_channel **eeprom_ch_info, + const u8 **eeprom_ch_idx) +{ + u32 offset = il->cfg->ops->lib-> + eeprom_ops.regulatory_bands[eep_band - 1]; + switch (eep_band) { + case 1: /* 2.4GHz band */ + *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1); + *eeprom_ch_info = (struct il_eeprom_channel *) + il_eeprom_query_addr(il, offset); + *eeprom_ch_idx = il_eeprom_band_1; + break; + case 2: /* 4.9GHz band */ + *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2); + *eeprom_ch_info = (struct il_eeprom_channel *) + il_eeprom_query_addr(il, offset); + *eeprom_ch_idx = il_eeprom_band_2; + break; + case 3: /* 5.2GHz band */ + *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3); + *eeprom_ch_info = (struct il_eeprom_channel *) + il_eeprom_query_addr(il, offset); + *eeprom_ch_idx = il_eeprom_band_3; + break; + case 4: /* 5.5GHz band */ + *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4); + *eeprom_ch_info = (struct il_eeprom_channel *) + il_eeprom_query_addr(il, offset); + *eeprom_ch_idx = il_eeprom_band_4; + break; + case 5: /* 5.7GHz band */ + *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5); + *eeprom_ch_info = (struct il_eeprom_channel *) + il_eeprom_query_addr(il, offset); + *eeprom_ch_idx = il_eeprom_band_5; + break; + case 6: /* 2.4GHz ht40 channels */ + *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6); + *eeprom_ch_info = (struct il_eeprom_channel *) + il_eeprom_query_addr(il, offset); + *eeprom_ch_idx = il_eeprom_band_6; + break; + case 7: /* 5 GHz ht40 channels */ + *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7); + *eeprom_ch_info = (struct il_eeprom_channel *) + il_eeprom_query_addr(il, offset); + *eeprom_ch_idx = il_eeprom_band_7; + break; + default: + BUG(); + } +} + +#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \ + ? # x " " : "") +/** + * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il. + * + * Does not set up a command, or touch hardware. + */ +static int il_mod_ht40_chan_info(struct il_priv *il, + enum ieee80211_band band, u16 channel, + const struct il_eeprom_channel *eeprom_ch, + u8 clear_ht40_extension_channel) +{ + struct il_channel_info *ch_info; + + ch_info = (struct il_channel_info *) + il_get_channel_info(il, band, channel); + + if (!il_is_channel_valid(ch_info)) + return -1; + + D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):" + " Ad-Hoc %ssupported\n", + ch_info->channel, + il_is_channel_a_band(ch_info) ? + "5.2" : "2.4", + CHECK_AND_PRINT(IBSS), + CHECK_AND_PRINT(ACTIVE), + CHECK_AND_PRINT(RADAR), + CHECK_AND_PRINT(WIDE), + CHECK_AND_PRINT(DFS), + eeprom_ch->flags, + eeprom_ch->max_power_avg, + ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) + && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? + "" : "not "); + + ch_info->ht40_eeprom = *eeprom_ch; + ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg; + ch_info->ht40_flags = eeprom_ch->flags; + if (eeprom_ch->flags & EEPROM_CHANNEL_VALID) + ch_info->ht40_extension_channel &= + ~clear_ht40_extension_channel; + + return 0; +} + +#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \ + ? # x " " : "") + +/** + * il_init_channel_map - Set up driver's info for all possible channels + */ +int il_init_channel_map(struct il_priv *il) +{ + int eeprom_ch_count = 0; + const u8 *eeprom_ch_idx = NULL; + const struct il_eeprom_channel *eeprom_ch_info = NULL; + int band, ch; + struct il_channel_info *ch_info; + + if (il->channel_count) { + D_EEPROM("Channel map already initialized.\n"); + return 0; + } + + D_EEPROM("Initializing regulatory info from EEPROM\n"); + + il->channel_count = + ARRAY_SIZE(il_eeprom_band_1) + + ARRAY_SIZE(il_eeprom_band_2) + + ARRAY_SIZE(il_eeprom_band_3) + + ARRAY_SIZE(il_eeprom_band_4) + + ARRAY_SIZE(il_eeprom_band_5); + + D_EEPROM("Parsing data for %d channels.\n", + il->channel_count); + + il->channel_info = kzalloc(sizeof(struct il_channel_info) * + il->channel_count, GFP_KERNEL); + if (!il->channel_info) { + IL_ERR("Could not allocate channel_info\n"); + il->channel_count = 0; + return -ENOMEM; + } + + ch_info = il->channel_info; + + /* Loop through the 5 EEPROM bands adding them in order to the + * channel map we maintain (that contains additional information than + * what just in the EEPROM) */ + for (band = 1; band <= 5; band++) { + + il_init_band_reference(il, band, &eeprom_ch_count, + &eeprom_ch_info, &eeprom_ch_idx); + + /* Loop through each band adding each of the channels */ + for (ch = 0; ch < eeprom_ch_count; ch++) { + ch_info->channel = eeprom_ch_idx[ch]; + ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ : + IEEE80211_BAND_5GHZ; + + /* permanently store EEPROM's channel regulatory flags + * and max power in channel info database. */ + ch_info->eeprom = eeprom_ch_info[ch]; + + /* Copy the run-time flags so they are there even on + * invalid channels */ + ch_info->flags = eeprom_ch_info[ch].flags; + /* First write that ht40 is not enabled, and then enable + * one by one */ + ch_info->ht40_extension_channel = + IEEE80211_CHAN_NO_HT40; + + if (!(il_is_channel_valid(ch_info))) { + D_EEPROM( + "Ch. %d Flags %x [%sGHz] - " + "No traffic\n", + ch_info->channel, + ch_info->flags, + il_is_channel_a_band(ch_info) ? + "5.2" : "2.4"); + ch_info++; + continue; + } + + /* Initialize regulatory-based run-time data */ + ch_info->max_power_avg = ch_info->curr_txpow = + eeprom_ch_info[ch].max_power_avg; + ch_info->scan_power = eeprom_ch_info[ch].max_power_avg; + ch_info->min_power = 0; + + D_EEPROM("Ch. %d [%sGHz] " + "%s%s%s%s%s%s(0x%02x %ddBm):" + " Ad-Hoc %ssupported\n", + ch_info->channel, + il_is_channel_a_band(ch_info) ? + "5.2" : "2.4", + CHECK_AND_PRINT_I(VALID), + CHECK_AND_PRINT_I(IBSS), + CHECK_AND_PRINT_I(ACTIVE), + CHECK_AND_PRINT_I(RADAR), + CHECK_AND_PRINT_I(WIDE), + CHECK_AND_PRINT_I(DFS), + eeprom_ch_info[ch].flags, + eeprom_ch_info[ch].max_power_avg, + ((eeprom_ch_info[ch]. + flags & EEPROM_CHANNEL_IBSS) + && !(eeprom_ch_info[ch]. + flags & EEPROM_CHANNEL_RADAR)) + ? "" : "not "); + + ch_info++; + } + } + + /* Check if we do have HT40 channels */ + if (il->cfg->ops->lib->eeprom_ops.regulatory_bands[5] == + EEPROM_REGULATORY_BAND_NO_HT40 && + il->cfg->ops->lib->eeprom_ops.regulatory_bands[6] == + EEPROM_REGULATORY_BAND_NO_HT40) + return 0; + + /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */ + for (band = 6; band <= 7; band++) { + enum ieee80211_band ieeeband; + + il_init_band_reference(il, band, &eeprom_ch_count, + &eeprom_ch_info, &eeprom_ch_idx); + + /* EEPROM band 6 is 2.4, band 7 is 5 GHz */ + ieeeband = + (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; + + /* Loop through each band adding each of the channels */ + for (ch = 0; ch < eeprom_ch_count; ch++) { + /* Set up driver's info for lower half */ + il_mod_ht40_chan_info(il, ieeeband, + eeprom_ch_idx[ch], + &eeprom_ch_info[ch], + IEEE80211_CHAN_NO_HT40PLUS); + + /* Set up driver's info for upper half */ + il_mod_ht40_chan_info(il, ieeeband, + eeprom_ch_idx[ch] + 4, + &eeprom_ch_info[ch], + IEEE80211_CHAN_NO_HT40MINUS); + } + } + + return 0; +} +EXPORT_SYMBOL(il_init_channel_map); + +/* + * il_free_channel_map - undo allocations in il_init_channel_map + */ +void il_free_channel_map(struct il_priv *il) +{ + kfree(il->channel_info); + il->channel_count = 0; +} +EXPORT_SYMBOL(il_free_channel_map); + +/** + * il_get_channel_info - Find driver's ilate channel info + * + * Based on band and channel number. + */ +const struct +il_channel_info *il_get_channel_info(const struct il_priv *il, + enum ieee80211_band band, u16 channel) +{ + int i; + + switch (band) { + case IEEE80211_BAND_5GHZ: + for (i = 14; i < il->channel_count; i++) { + if (il->channel_info[i].channel == channel) + return &il->channel_info[i]; + } + break; + case IEEE80211_BAND_2GHZ: + if (channel >= 1 && channel <= 14) + return &il->channel_info[channel - 1]; + break; + default: + BUG(); + } + + return NULL; +} +EXPORT_SYMBOL(il_get_channel_info); + +/* + * Setting power level allows the card to go to sleep when not busy. + * + * We calculate a sleep command based on the required latency, which + * we get from mac80211. In order to handle thermal throttling, we can + * also use pre-defined power levels. + */ + +/* + * This defines the old power levels. They are still used by default + * (level 1) and for thermal throttle (levels 3 through 5) + */ + +struct il_power_vec_entry { + struct il_powertable_cmd cmd; + u8 no_dtim; /* number of skip dtim */ +}; + +static void il_power_sleep_cam_cmd(struct il_priv *il, + struct il_powertable_cmd *cmd) +{ + memset(cmd, 0, sizeof(*cmd)); + + if (il->power_data.pci_pm) + cmd->flags |= IL_POWER_PCI_PM_MSK; + + D_POWER("Sleep command for CAM\n"); +} + +static int +il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd) +{ + D_POWER("Sending power/sleep command\n"); + D_POWER("Flags value = 0x%08X\n", cmd->flags); + D_POWER("Tx timeout = %u\n", + le32_to_cpu(cmd->tx_data_timeout)); + D_POWER("Rx timeout = %u\n", + le32_to_cpu(cmd->rx_data_timeout)); + D_POWER( + "Sleep interval vector = { %d , %d , %d , %d , %d }\n", + le32_to_cpu(cmd->sleep_interval[0]), + le32_to_cpu(cmd->sleep_interval[1]), + le32_to_cpu(cmd->sleep_interval[2]), + le32_to_cpu(cmd->sleep_interval[3]), + le32_to_cpu(cmd->sleep_interval[4])); + + return il_send_cmd_pdu(il, C_POWER_TBL, + sizeof(struct il_powertable_cmd), cmd); +} + +int +il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, + bool force) +{ + int ret; + bool update_chains; + + lockdep_assert_held(&il->mutex); + + /* Don't update the RX chain when chain noise calibration is running */ + update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE || + il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE; + + if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force) + return 0; + + if (!il_is_ready_rf(il)) + return -EIO; + + /* scan complete use sleep_power_next, need to be updated */ + memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd)); + if (test_bit(S_SCANNING, &il->status) && !force) { + D_INFO("Defer power set mode while scanning\n"); + return 0; + } + + if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK) + set_bit(S_POWER_PMI, &il->status); + + ret = il_set_power(il, cmd); + if (!ret) { + if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)) + clear_bit(S_POWER_PMI, &il->status); + + if (il->cfg->ops->lib->update_chain_flags && update_chains) + il->cfg->ops->lib->update_chain_flags(il); + else if (il->cfg->ops->lib->update_chain_flags) + D_POWER( + "Cannot update the power, chain noise " + "calibration running: %d\n", + il->chain_noise_data.state); + + memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)); + } else + IL_ERR("set power fail, ret = %d", ret); + + return ret; +} + +int il_power_update_mode(struct il_priv *il, bool force) +{ + struct il_powertable_cmd cmd; + + il_power_sleep_cam_cmd(il, &cmd); + return il_power_set_mode(il, &cmd, force); +} +EXPORT_SYMBOL(il_power_update_mode); + +/* initialize to default */ +void il_power_initialize(struct il_priv *il) +{ + u16 lctl = il_pcie_link_ctl(il); + + il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN); + + il->power_data.debug_sleep_level_override = -1; + + memset(&il->power_data.sleep_cmd, 0, + sizeof(il->power_data.sleep_cmd)); +} +EXPORT_SYMBOL(il_power_initialize); + +/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after + * sending probe req. This should be set long enough to hear probe responses + * from more than one AP. */ +#define IL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */ +#define IL_ACTIVE_DWELL_TIME_52 (20) + +#define IL_ACTIVE_DWELL_FACTOR_24GHZ (3) +#define IL_ACTIVE_DWELL_FACTOR_52GHZ (2) + +/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. + * Must be set longer than active dwell time. + * For the most reliable scan, set > AP beacon interval (typically 100msec). */ +#define IL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ +#define IL_PASSIVE_DWELL_TIME_52 (10) +#define IL_PASSIVE_DWELL_BASE (100) +#define IL_CHANNEL_TUNE_TIME 5 + +static int il_send_scan_abort(struct il_priv *il) +{ + int ret; + struct il_rx_pkt *pkt; + struct il_host_cmd cmd = { + .id = C_SCAN_ABORT, + .flags = CMD_WANT_SKB, + }; + + /* Exit instantly with error when device is not ready + * to receive scan abort command or it does not perform + * hardware scan currently */ + if (!test_bit(S_READY, &il->status) || + !test_bit(S_GEO_CONFIGURED, &il->status) || + !test_bit(S_SCAN_HW, &il->status) || + test_bit(S_FW_ERROR, &il->status) || + test_bit(S_EXIT_PENDING, &il->status)) + return -EIO; + + ret = il_send_cmd_sync(il, &cmd); + if (ret) + return ret; + + pkt = (struct il_rx_pkt *)cmd.reply_page; + if (pkt->u.status != CAN_ABORT_STATUS) { + /* The scan abort will return 1 for success or + * 2 for "failure". A failure condition can be + * due to simply not being in an active scan which + * can occur if we send the scan abort before we + * the microcode has notified us that a scan is + * completed. */ + D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status); + ret = -EIO; + } + + il_free_pages(il, cmd.reply_page); + return ret; +} + +static void il_complete_scan(struct il_priv *il, bool aborted) +{ + /* check if scan was requested from mac80211 */ + if (il->scan_request) { + D_SCAN("Complete scan in mac80211\n"); + ieee80211_scan_completed(il->hw, aborted); + } + + il->scan_vif = NULL; + il->scan_request = NULL; +} + +void il_force_scan_end(struct il_priv *il) +{ + lockdep_assert_held(&il->mutex); + + if (!test_bit(S_SCANNING, &il->status)) { + D_SCAN("Forcing scan end while not scanning\n"); + return; + } + + D_SCAN("Forcing scan end\n"); + clear_bit(S_SCANNING, &il->status); + clear_bit(S_SCAN_HW, &il->status); + clear_bit(S_SCAN_ABORTING, &il->status); + il_complete_scan(il, true); +} + +static void il_do_scan_abort(struct il_priv *il) +{ + int ret; + + lockdep_assert_held(&il->mutex); + + if (!test_bit(S_SCANNING, &il->status)) { + D_SCAN("Not performing scan to abort\n"); + return; + } + + if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) { + D_SCAN("Scan abort in progress\n"); + return; + } + + ret = il_send_scan_abort(il); + if (ret) { + D_SCAN("Send scan abort failed %d\n", ret); + il_force_scan_end(il); + } else + D_SCAN("Successfully send scan abort\n"); +} + +/** + * il_scan_cancel - Cancel any currently executing HW scan + */ +int il_scan_cancel(struct il_priv *il) +{ + D_SCAN("Queuing abort scan\n"); + queue_work(il->workqueue, &il->abort_scan); + return 0; +} +EXPORT_SYMBOL(il_scan_cancel); + +/** + * il_scan_cancel_timeout - Cancel any currently executing HW scan + * @ms: amount of time to wait (in milliseconds) for scan to abort + * + */ +int il_scan_cancel_timeout(struct il_priv *il, unsigned long ms) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(ms); + + lockdep_assert_held(&il->mutex); + + D_SCAN("Scan cancel timeout\n"); + + il_do_scan_abort(il); + + while (time_before_eq(jiffies, timeout)) { + if (!test_bit(S_SCAN_HW, &il->status)) + break; + msleep(20); + } + + return test_bit(S_SCAN_HW, &il->status); +} +EXPORT_SYMBOL(il_scan_cancel_timeout); + +/* Service response to C_SCAN (0x80) */ +static void il_hdl_scan(struct il_priv *il, + struct il_rx_buf *rxb) +{ +#ifdef CONFIG_IWLEGACY_DEBUG + struct il_rx_pkt *pkt = rxb_addr(rxb); + struct il_scanreq_notification *notif = + (struct il_scanreq_notification *)pkt->u.raw; + + D_SCAN("Scan request status = 0x%x\n", notif->status); +#endif +} + +/* Service N_SCAN_START (0x82) */ +static void il_hdl_scan_start(struct il_priv *il, + struct il_rx_buf *rxb) +{ + struct il_rx_pkt *pkt = rxb_addr(rxb); + struct il_scanstart_notification *notif = + (struct il_scanstart_notification *)pkt->u.raw; + il->scan_start_tsf = le32_to_cpu(notif->tsf_low); + D_SCAN("Scan start: " + "%d [802.11%s] " + "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", + notif->channel, + notif->band ? "bg" : "a", + le32_to_cpu(notif->tsf_high), + le32_to_cpu(notif->tsf_low), + notif->status, notif->beacon_timer); +} + +/* Service N_SCAN_RESULTS (0x83) */ +static void il_hdl_scan_results(struct il_priv *il, + struct il_rx_buf *rxb) +{ +#ifdef CONFIG_IWLEGACY_DEBUG + struct il_rx_pkt *pkt = rxb_addr(rxb); + struct il_scanresults_notification *notif = + (struct il_scanresults_notification *)pkt->u.raw; + + D_SCAN("Scan ch.res: " + "%d [802.11%s] " + "(TSF: 0x%08X:%08X) - %d " + "elapsed=%lu usec\n", + notif->channel, + notif->band ? "bg" : "a", + le32_to_cpu(notif->tsf_high), + le32_to_cpu(notif->tsf_low), + le32_to_cpu(notif->stats[0]), + le32_to_cpu(notif->tsf_low) - il->scan_start_tsf); +#endif +} + +/* Service N_SCAN_COMPLETE (0x84) */ +static void il_hdl_scan_complete(struct il_priv *il, + struct il_rx_buf *rxb) +{ + +#ifdef CONFIG_IWLEGACY_DEBUG + struct il_rx_pkt *pkt = rxb_addr(rxb); + struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw; +#endif + + D_SCAN( + "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", + scan_notif->scanned_channels, + scan_notif->tsf_low, + scan_notif->tsf_high, scan_notif->status); + + /* The HW is no longer scanning */ + clear_bit(S_SCAN_HW, &il->status); + + D_SCAN("Scan on %sGHz took %dms\n", + (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2", + jiffies_to_msecs(jiffies - il->scan_start)); + + queue_work(il->workqueue, &il->scan_completed); +} + +void il_setup_rx_scan_handlers(struct il_priv *il) +{ + /* scan handlers */ + il->handlers[C_SCAN] = il_hdl_scan; + il->handlers[N_SCAN_START] = + il_hdl_scan_start; + il->handlers[N_SCAN_RESULTS] = + il_hdl_scan_results; + il->handlers[N_SCAN_COMPLETE] = + il_hdl_scan_complete; +} +EXPORT_SYMBOL(il_setup_rx_scan_handlers); + +inline u16 il_get_active_dwell_time(struct il_priv *il, + enum ieee80211_band band, + u8 n_probes) +{ + if (band == IEEE80211_BAND_5GHZ) + return IL_ACTIVE_DWELL_TIME_52 + + IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); + else + return IL_ACTIVE_DWELL_TIME_24 + + IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); +} +EXPORT_SYMBOL(il_get_active_dwell_time); + +u16 il_get_passive_dwell_time(struct il_priv *il, + enum ieee80211_band band, + struct ieee80211_vif *vif) +{ + struct il_rxon_context *ctx = &il->ctx; + u16 value; + + u16 passive = (band == IEEE80211_BAND_2GHZ) ? + IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_24 : + IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_52; + + if (il_is_any_associated(il)) { + /* + * If we're associated, we clamp the maximum passive + * dwell time to be 98% of the smallest beacon interval + * (minus 2 * channel tune time) + */ + value = ctx->vif ? ctx->vif->bss_conf.beacon_int : 0; + if (value > IL_PASSIVE_DWELL_BASE || !value) + value = IL_PASSIVE_DWELL_BASE; + value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2; + passive = min(value, passive); + } + + return passive; +} +EXPORT_SYMBOL(il_get_passive_dwell_time); + +void il_init_scan_params(struct il_priv *il) +{ + u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1; + if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ]) + il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx; + if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ]) + il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx; +} +EXPORT_SYMBOL(il_init_scan_params); + +static int il_scan_initiate(struct il_priv *il, + struct ieee80211_vif *vif) +{ + int ret; + + lockdep_assert_held(&il->mutex); + + if (WARN_ON(!il->cfg->ops->utils->request_scan)) + return -EOPNOTSUPP; + + cancel_delayed_work(&il->scan_check); + + if (!il_is_ready_rf(il)) { + IL_WARN("Request scan called when driver not ready.\n"); + return -EIO; + } + + if (test_bit(S_SCAN_HW, &il->status)) { + D_SCAN( + "Multiple concurrent scan requests in parallel.\n"); + return -EBUSY; + } + + if (test_bit(S_SCAN_ABORTING, &il->status)) { + D_SCAN("Scan request while abort pending.\n"); + return -EBUSY; + } + + D_SCAN("Starting scan...\n"); + + set_bit(S_SCANNING, &il->status); + il->scan_start = jiffies; + + ret = il->cfg->ops->utils->request_scan(il, vif); + if (ret) { + clear_bit(S_SCANNING, &il->status); + return ret; + } + + queue_delayed_work(il->workqueue, &il->scan_check, + IL_SCAN_CHECK_WATCHDOG); + + return 0; +} + +int il_mac_hw_scan(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct cfg80211_scan_request *req) +{ + struct il_priv *il = hw->priv; + int ret; + + D_MAC80211("enter\n"); + + if (req->n_channels == 0) + return -EINVAL; + + mutex_lock(&il->mutex); + + if (test_bit(S_SCANNING, &il->status)) { + D_SCAN("Scan already in progress.\n"); + ret = -EAGAIN; + goto out_unlock; + } + + /* mac80211 will only ask for one band at a time */ + il->scan_request = req; + il->scan_vif = vif; + il->scan_band = req->channels[0]->band; + + ret = il_scan_initiate(il, vif); + + D_MAC80211("leave\n"); + +out_unlock: + mutex_unlock(&il->mutex); + + return ret; +} +EXPORT_SYMBOL(il_mac_hw_scan); + +static void il_bg_scan_check(struct work_struct *data) +{ + struct il_priv *il = + container_of(data, struct il_priv, scan_check.work); + + D_SCAN("Scan check work\n"); + + /* Since we are here firmware does not finish scan and + * most likely is in bad shape, so we don't bother to + * send abort command, just force scan complete to mac80211 */ + mutex_lock(&il->mutex); + il_force_scan_end(il); + mutex_unlock(&il->mutex); +} + +/** + * il_fill_probe_req - fill in all required fields and IE for probe request + */ + +u16 +il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame, + const u8 *ta, const u8 *ies, int ie_len, int left) +{ + int len = 0; + u8 *pos = NULL; + + /* Make sure there is enough space for the probe request, + * two mandatory IEs and the data */ + left -= 24; + if (left < 0) + return 0; + + frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); + memcpy(frame->da, il_bcast_addr, ETH_ALEN); + memcpy(frame->sa, ta, ETH_ALEN); + memcpy(frame->bssid, il_bcast_addr, ETH_ALEN); + frame->seq_ctrl = 0; + + len += 24; + + /* ...next IE... */ + pos = &frame->u.probe_req.variable[0]; + + /* fill in our indirect SSID IE */ + left -= 2; + if (left < 0) + return 0; + *pos++ = WLAN_EID_SSID; + *pos++ = 0; + + len += 2; + + if (WARN_ON(left < ie_len)) + return len; + + if (ies && ie_len) { + memcpy(pos, ies, ie_len); + len += ie_len; + } + + return (u16)len; +} +EXPORT_SYMBOL(il_fill_probe_req); + +static void il_bg_abort_scan(struct work_struct *work) +{ + struct il_priv *il = container_of(work, struct il_priv, abort_scan); + + D_SCAN("Abort scan work\n"); + + /* We keep scan_check work queued in case when firmware will not + * report back scan completed notification */ + mutex_lock(&il->mutex); + il_scan_cancel_timeout(il, 200); + mutex_unlock(&il->mutex); +} + +static void il_bg_scan_completed(struct work_struct *work) +{ + struct il_priv *il = + container_of(work, struct il_priv, scan_completed); + bool aborted; + + D_SCAN("Completed scan.\n"); + + cancel_delayed_work(&il->scan_check); + + mutex_lock(&il->mutex); + + aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status); + if (aborted) + D_SCAN("Aborted scan completed.\n"); + + if (!test_and_clear_bit(S_SCANNING, &il->status)) { + D_SCAN("Scan already completed.\n"); + goto out_settings; + } + + il_complete_scan(il, aborted); + +out_settings: + /* Can we still talk to firmware ? */ + if (!il_is_ready_rf(il)) + goto out; + + /* + * We do not commit power settings while scan is pending, + * do it now if the settings changed. + */ + il_power_set_mode(il, &il->power_data.sleep_cmd_next, false); + il_set_tx_power(il, il->tx_power_next, false); + + il->cfg->ops->utils->post_scan(il); + +out: + mutex_unlock(&il->mutex); +} + +void il_setup_scan_deferred_work(struct il_priv *il) +{ + INIT_WORK(&il->scan_completed, il_bg_scan_completed); + INIT_WORK(&il->abort_scan, il_bg_abort_scan); + INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check); +} +EXPORT_SYMBOL(il_setup_scan_deferred_work); + +void il_cancel_scan_deferred_work(struct il_priv *il) +{ + cancel_work_sync(&il->abort_scan); + cancel_work_sync(&il->scan_completed); + + if (cancel_delayed_work_sync(&il->scan_check)) { + mutex_lock(&il->mutex); + il_force_scan_end(il); + mutex_unlock(&il->mutex); + } +} +EXPORT_SYMBOL(il_cancel_scan_deferred_work); + +/* il->sta_lock must be held */ +static void il_sta_ucode_activate(struct il_priv *il, u8 sta_id) +{ + + if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) + IL_ERR( + "ACTIVATE a non DRIVER active station id %u addr %pM\n", + sta_id, il->stations[sta_id].sta.sta.addr); + + if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) { + D_ASSOC( + "STA id %u addr %pM already present" + " in uCode (according to driver)\n", + sta_id, il->stations[sta_id].sta.sta.addr); + } else { + il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE; + D_ASSOC("Added STA id %u addr %pM to uCode\n", + sta_id, il->stations[sta_id].sta.sta.addr); + } +} + +static int il_process_add_sta_resp(struct il_priv *il, + struct il_addsta_cmd *addsta, + struct il_rx_pkt *pkt, + bool sync) +{ + u8 sta_id = addsta->sta.sta_id; + unsigned long flags; + int ret = -EIO; + + if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { + IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", + pkt->hdr.flags); + return ret; + } + + D_INFO("Processing response for adding station %u\n", + sta_id); + + spin_lock_irqsave(&il->sta_lock, flags); + + switch (pkt->u.add_sta.status) { + case ADD_STA_SUCCESS_MSK: + D_INFO("C_ADD_STA PASSED\n"); + il_sta_ucode_activate(il, sta_id); + ret = 0; + break; + case ADD_STA_NO_ROOM_IN_TBL: + IL_ERR("Adding station %d failed, no room in table.\n", + sta_id); + break; + case ADD_STA_NO_BLOCK_ACK_RESOURCE: + IL_ERR( + "Adding station %d failed, no block ack resource.\n", + sta_id); + break; + case ADD_STA_MODIFY_NON_EXIST_STA: + IL_ERR("Attempting to modify non-existing station %d\n", + sta_id); + break; + default: + D_ASSOC("Received C_ADD_STA:(0x%08X)\n", + pkt->u.add_sta.status); + break; + } + + D_INFO("%s station id %u addr %pM\n", + il->stations[sta_id].sta.mode == + STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", + sta_id, il->stations[sta_id].sta.sta.addr); + + /* + * XXX: The MAC address in the command buffer is often changed from + * the original sent to the device. That is, the MAC address + * written to the command buffer often is not the same MAC address + * read from the command buffer when the command returns. This + * issue has not yet been resolved and this debugging is left to + * observe the problem. + */ + D_INFO("%s station according to cmd buffer %pM\n", + il->stations[sta_id].sta.mode == + STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", + addsta->sta.addr); + spin_unlock_irqrestore(&il->sta_lock, flags); + + return ret; +} + +static void il_add_sta_callback(struct il_priv *il, + struct il_device_cmd *cmd, + struct il_rx_pkt *pkt) +{ + struct il_addsta_cmd *addsta = + (struct il_addsta_cmd *)cmd->cmd.payload; + + il_process_add_sta_resp(il, addsta, pkt, false); + +} + +int il_send_add_sta(struct il_priv *il, + struct il_addsta_cmd *sta, u8 flags) +{ + struct il_rx_pkt *pkt = NULL; + int ret = 0; + u8 data[sizeof(*sta)]; + struct il_host_cmd cmd = { + .id = C_ADD_STA, + .flags = flags, + .data = data, + }; + u8 sta_id __maybe_unused = sta->sta.sta_id; + + D_INFO("Adding sta %u (%pM) %ssynchronously\n", + sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); + + if (flags & CMD_ASYNC) + cmd.callback = il_add_sta_callback; + else { + cmd.flags |= CMD_WANT_SKB; + might_sleep(); + } + + cmd.len = il->cfg->ops->utils->build_addsta_hcmd(sta, data); + ret = il_send_cmd(il, &cmd); + + if (ret || (flags & CMD_ASYNC)) + return ret; + + if (ret == 0) { + pkt = (struct il_rx_pkt *)cmd.reply_page; + ret = il_process_add_sta_resp(il, sta, pkt, true); + } + il_free_pages(il, cmd.reply_page); + + return ret; +} +EXPORT_SYMBOL(il_send_add_sta); + +static void il_set_ht_add_station(struct il_priv *il, u8 idx, + struct ieee80211_sta *sta, + struct il_rxon_context *ctx) +{ + struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; + __le32 sta_flags; + u8 mimo_ps_mode; + + if (!sta || !sta_ht_inf->ht_supported) + goto done; + + mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2; + D_ASSOC("spatial multiplexing power save mode: %s\n", + (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? + "static" : + (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? + "dynamic" : "disabled"); + + sta_flags = il->stations[idx].sta.station_flags; + + sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK); + + switch (mimo_ps_mode) { + case WLAN_HT_CAP_SM_PS_STATIC: + sta_flags |= STA_FLG_MIMO_DIS_MSK; + break; + case WLAN_HT_CAP_SM_PS_DYNAMIC: + sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK; + break; + case WLAN_HT_CAP_SM_PS_DISABLED: + break; + default: + IL_WARN("Invalid MIMO PS mode %d\n", mimo_ps_mode); + break; + } + + sta_flags |= cpu_to_le32( + (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); + + sta_flags |= cpu_to_le32( + (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); + + if (il_is_ht40_tx_allowed(il, ctx, &sta->ht_cap)) + sta_flags |= STA_FLG_HT40_EN_MSK; + else + sta_flags &= ~STA_FLG_HT40_EN_MSK; + + il->stations[idx].sta.station_flags = sta_flags; + done: + return; +} + +/** + * il_prep_station - Prepare station information for addition + * + * should be called with sta_lock held + */ +u8 il_prep_station(struct il_priv *il, struct il_rxon_context *ctx, + const u8 *addr, bool is_ap, struct ieee80211_sta *sta) +{ + struct il_station_entry *station; + int i; + u8 sta_id = IL_INVALID_STATION; + u16 rate; + + if (is_ap) + sta_id = ctx->ap_sta_id; + else if (is_broadcast_ether_addr(addr)) + sta_id = ctx->bcast_sta_id; + else + for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) { + if (!compare_ether_addr(il->stations[i].sta.sta.addr, + addr)) { + sta_id = i; + break; + } + + if (!il->stations[i].used && + sta_id == IL_INVALID_STATION) + sta_id = i; + } + + /* + * These two conditions have the same outcome, but keep them + * separate + */ + if (unlikely(sta_id == IL_INVALID_STATION)) + return sta_id; + + /* + * uCode is not able to deal with multiple requests to add a + * station. Keep track if one is in progress so that we do not send + * another. + */ + if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) { + D_INFO( + "STA %d already in process of being added.\n", + sta_id); + return sta_id; + } + + if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) && + (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) && + !compare_ether_addr(il->stations[sta_id].sta.sta.addr, addr)) { + D_ASSOC( + "STA %d (%pM) already added, not adding again.\n", + sta_id, addr); + return sta_id; + } + + station = &il->stations[sta_id]; + station->used = IL_STA_DRIVER_ACTIVE; + D_ASSOC("Add STA to driver ID %d: %pM\n", + sta_id, addr); + il->num_stations++; + + /* Set up the C_ADD_STA command to send to device */ + memset(&station->sta, 0, sizeof(struct il_addsta_cmd)); + memcpy(station->sta.sta.addr, addr, ETH_ALEN); + station->sta.mode = 0; + station->sta.sta.sta_id = sta_id; + station->sta.station_flags = ctx->station_flags; + station->ctxid = ctx->ctxid; + + if (sta) { + struct il_station_priv_common *sta_priv; + + sta_priv = (void *)sta->drv_priv; + sta_priv->ctx = ctx; + } + + /* + * OK to call unconditionally, since local stations (IBSS BSSID + * STA and broadcast STA) pass in a NULL sta, and mac80211 + * doesn't allow HT IBSS. + */ + il_set_ht_add_station(il, sta_id, sta, ctx); + + /* 3945 only */ + rate = (il->band == IEEE80211_BAND_5GHZ) ? + RATE_6M_PLCP : RATE_1M_PLCP; + /* Turn on both antennas for the station... */ + station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK); + + return sta_id; + +} +EXPORT_SYMBOL_GPL(il_prep_station); + +#define STA_WAIT_TIMEOUT (HZ/2) + +/** + * il_add_station_common - + */ +int +il_add_station_common(struct il_priv *il, + struct il_rxon_context *ctx, + const u8 *addr, bool is_ap, + struct ieee80211_sta *sta, u8 *sta_id_r) +{ + unsigned long flags_spin; + int ret = 0; + u8 sta_id; + struct il_addsta_cmd sta_cmd; + + *sta_id_r = 0; + spin_lock_irqsave(&il->sta_lock, flags_spin); + sta_id = il_prep_station(il, ctx, addr, is_ap, sta); + if (sta_id == IL_INVALID_STATION) { + IL_ERR("Unable to prepare station %pM for addition\n", + addr); + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + return -EINVAL; + } + + /* + * uCode is not able to deal with multiple requests to add a + * station. Keep track if one is in progress so that we do not send + * another. + */ + if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) { + D_INFO( + "STA %d already in process of being added.\n", + sta_id); + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + return -EEXIST; + } + + if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) && + (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) { + D_ASSOC( + "STA %d (%pM) already added, not adding again.\n", + sta_id, addr); + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + return -EEXIST; + } + + il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS; + memcpy(&sta_cmd, &il->stations[sta_id].sta, + sizeof(struct il_addsta_cmd)); + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + + /* Add station to device's station table */ + ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC); + if (ret) { + spin_lock_irqsave(&il->sta_lock, flags_spin); + IL_ERR("Adding station %pM failed.\n", + il->stations[sta_id].sta.sta.addr); + il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE; + il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS; + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + } + *sta_id_r = sta_id; + return ret; +} +EXPORT_SYMBOL(il_add_station_common); + +/** + * il_sta_ucode_deactivate - deactivate ucode status for a station + * + * il->sta_lock must be held + */ +static void il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id) +{ + /* Ucode must be active and driver must be non active */ + if ((il->stations[sta_id].used & + (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) != + IL_STA_UCODE_ACTIVE) + IL_ERR("removed non active STA %u\n", sta_id); + + il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE; + + memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry)); + D_ASSOC("Removed STA %u\n", sta_id); +} + +static int il_send_remove_station(struct il_priv *il, + const u8 *addr, int sta_id, + bool temporary) +{ + struct il_rx_pkt *pkt; + int ret; + + unsigned long flags_spin; + struct il_rem_sta_cmd rm_sta_cmd; + + struct il_host_cmd cmd = { + .id = C_REM_STA, + .len = sizeof(struct il_rem_sta_cmd), + .flags = CMD_SYNC, + .data = &rm_sta_cmd, + }; + + memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); + rm_sta_cmd.num_sta = 1; + memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); + + cmd.flags |= CMD_WANT_SKB; + + ret = il_send_cmd(il, &cmd); + + if (ret) + return ret; + + pkt = (struct il_rx_pkt *)cmd.reply_page; + if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { + IL_ERR("Bad return from C_REM_STA (0x%08X)\n", + pkt->hdr.flags); + ret = -EIO; + } + + if (!ret) { + switch (pkt->u.rem_sta.status) { + case REM_STA_SUCCESS_MSK: + if (!temporary) { + spin_lock_irqsave(&il->sta_lock, flags_spin); + il_sta_ucode_deactivate(il, sta_id); + spin_unlock_irqrestore(&il->sta_lock, + flags_spin); + } + D_ASSOC("C_REM_STA PASSED\n"); + break; + default: + ret = -EIO; + IL_ERR("C_REM_STA failed\n"); + break; + } + } + il_free_pages(il, cmd.reply_page); + + return ret; +} + +/** + * il_remove_station - Remove driver's knowledge of station. + */ +int il_remove_station(struct il_priv *il, const u8 sta_id, + const u8 *addr) +{ + unsigned long flags; + + if (!il_is_ready(il)) { + D_INFO( + "Unable to remove station %pM, device not ready.\n", + addr); + /* + * It is typical for stations to be removed when we are + * going down. Return success since device will be down + * soon anyway + */ + return 0; + } + + D_ASSOC("Removing STA from driver:%d %pM\n", + sta_id, addr); + + if (WARN_ON(sta_id == IL_INVALID_STATION)) + return -EINVAL; + + spin_lock_irqsave(&il->sta_lock, flags); + + if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) { + D_INFO("Removing %pM but non DRIVER active\n", + addr); + goto out_err; + } + + if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) { + D_INFO("Removing %pM but non UCODE active\n", + addr); + goto out_err; + } + + if (il->stations[sta_id].used & IL_STA_LOCAL) { + kfree(il->stations[sta_id].lq); + il->stations[sta_id].lq = NULL; + } + + il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE; + + il->num_stations--; + + BUG_ON(il->num_stations < 0); + + spin_unlock_irqrestore(&il->sta_lock, flags); + + return il_send_remove_station(il, addr, sta_id, false); +out_err: + spin_unlock_irqrestore(&il->sta_lock, flags); + return -EINVAL; +} +EXPORT_SYMBOL_GPL(il_remove_station); + +/** + * il_clear_ucode_stations - clear ucode station table bits + * + * This function clears all the bits in the driver indicating + * which stations are active in the ucode. Call when something + * other than explicit station management would cause this in + * the ucode, e.g. unassociated RXON. + */ +void il_clear_ucode_stations(struct il_priv *il, + struct il_rxon_context *ctx) +{ + int i; + unsigned long flags_spin; + bool cleared = false; + + D_INFO("Clearing ucode stations in driver\n"); + + spin_lock_irqsave(&il->sta_lock, flags_spin); + for (i = 0; i < il->hw_params.max_stations; i++) { + if (ctx && ctx->ctxid != il->stations[i].ctxid) + continue; + + if (il->stations[i].used & IL_STA_UCODE_ACTIVE) { + D_INFO( + "Clearing ucode active for station %d\n", i); + il->stations[i].used &= ~IL_STA_UCODE_ACTIVE; + cleared = true; + } + } + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + + if (!cleared) + D_INFO( + "No active stations found to be cleared\n"); +} +EXPORT_SYMBOL(il_clear_ucode_stations); + +/** + * il_restore_stations() - Restore driver known stations to device + * + * All stations considered active by driver, but not present in ucode, is + * restored. + * + * Function sleeps. + */ +void +il_restore_stations(struct il_priv *il, struct il_rxon_context *ctx) +{ + struct il_addsta_cmd sta_cmd; + struct il_link_quality_cmd lq; + unsigned long flags_spin; + int i; + bool found = false; + int ret; + bool send_lq; + + if (!il_is_ready(il)) { + D_INFO( + "Not ready yet, not restoring any stations.\n"); + return; + } + + D_ASSOC("Restoring all known stations ... start.\n"); + spin_lock_irqsave(&il->sta_lock, flags_spin); + for (i = 0; i < il->hw_params.max_stations; i++) { + if (ctx->ctxid != il->stations[i].ctxid) + continue; + if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) && + !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) { + D_ASSOC("Restoring sta %pM\n", + il->stations[i].sta.sta.addr); + il->stations[i].sta.mode = 0; + il->stations[i].used |= IL_STA_UCODE_INPROGRESS; + found = true; + } + } + + for (i = 0; i < il->hw_params.max_stations; i++) { + if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) { + memcpy(&sta_cmd, &il->stations[i].sta, + sizeof(struct il_addsta_cmd)); + send_lq = false; + if (il->stations[i].lq) { + memcpy(&lq, il->stations[i].lq, + sizeof(struct il_link_quality_cmd)); + send_lq = true; + } + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC); + if (ret) { + spin_lock_irqsave(&il->sta_lock, flags_spin); + IL_ERR("Adding station %pM failed.\n", + il->stations[i].sta.sta.addr); + il->stations[i].used &= + ~IL_STA_DRIVER_ACTIVE; + il->stations[i].used &= + ~IL_STA_UCODE_INPROGRESS; + spin_unlock_irqrestore(&il->sta_lock, + flags_spin); + } + /* + * Rate scaling has already been initialized, send + * current LQ command + */ + if (send_lq) + il_send_lq_cmd(il, ctx, &lq, + CMD_SYNC, true); + spin_lock_irqsave(&il->sta_lock, flags_spin); + il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS; + } + } + + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + if (!found) + D_INFO("Restoring all known stations" + " .... no stations to be restored.\n"); + else + D_INFO("Restoring all known stations" + " .... complete.\n"); +} +EXPORT_SYMBOL(il_restore_stations); + +int il_get_free_ucode_key_idx(struct il_priv *il) +{ + int i; + + for (i = 0; i < il->sta_key_max_num; i++) + if (!test_and_set_bit(i, &il->ucode_key_table)) + return i; + + return WEP_INVALID_OFFSET; +} +EXPORT_SYMBOL(il_get_free_ucode_key_idx); + +void il_dealloc_bcast_stations(struct il_priv *il) +{ + unsigned long flags; + int i; + + spin_lock_irqsave(&il->sta_lock, flags); + for (i = 0; i < il->hw_params.max_stations; i++) { + if (!(il->stations[i].used & IL_STA_BCAST)) + continue; + + il->stations[i].used &= ~IL_STA_UCODE_ACTIVE; + il->num_stations--; + BUG_ON(il->num_stations < 0); + kfree(il->stations[i].lq); + il->stations[i].lq = NULL; + } + spin_unlock_irqrestore(&il->sta_lock, flags); +} +EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations); + +#ifdef CONFIG_IWLEGACY_DEBUG +static void il_dump_lq_cmd(struct il_priv *il, + struct il_link_quality_cmd *lq) +{ + int i; + D_RATE("lq station id 0x%x\n", lq->sta_id); + D_RATE("lq ant 0x%X 0x%X\n", + lq->general_params.single_stream_ant_msk, + lq->general_params.dual_stream_ant_msk); + + for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) + D_RATE("lq idx %d 0x%X\n", + i, lq->rs_table[i].rate_n_flags); +} +#else +static inline void il_dump_lq_cmd(struct il_priv *il, + struct il_link_quality_cmd *lq) +{ +} +#endif + +/** + * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity + * + * It sometimes happens when a HT rate has been in use and we + * loose connectivity with AP then mac80211 will first tell us that the + * current channel is not HT anymore before removing the station. In such a + * scenario the RXON flags will be updated to indicate we are not + * communicating HT anymore, but the LQ command may still contain HT rates. + * Test for this to prevent driver from sending LQ command between the time + * RXON flags are updated and when LQ command is updated. + */ +static bool il_is_lq_table_valid(struct il_priv *il, + struct il_rxon_context *ctx, + struct il_link_quality_cmd *lq) +{ + int i; + + if (ctx->ht.enabled) + return true; + + D_INFO("Channel %u is not an HT channel\n", + ctx->active.channel); + for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { + if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & + RATE_MCS_HT_MSK) { + D_INFO( + "idx %d of LQ expects HT channel\n", + i); + return false; + } + } + return true; +} + +/** + * il_send_lq_cmd() - Send link quality command + * @init: This command is sent as part of station initialization right + * after station has been added. + * + * The link quality command is sent as the last step of station creation. + * This is the special case in which init is set and we call a callback in + * this case to clear the state indicating that station creation is in + * progress. + */ +int il_send_lq_cmd(struct il_priv *il, struct il_rxon_context *ctx, + struct il_link_quality_cmd *lq, u8 flags, bool init) +{ + int ret = 0; + unsigned long flags_spin; + + struct il_host_cmd cmd = { + .id = C_TX_LINK_QUALITY_CMD, + .len = sizeof(struct il_link_quality_cmd), + .flags = flags, + .data = lq, + }; + + if (WARN_ON(lq->sta_id == IL_INVALID_STATION)) + return -EINVAL; + + + spin_lock_irqsave(&il->sta_lock, flags_spin); + if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) { + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + return -EINVAL; + } + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + + il_dump_lq_cmd(il, lq); + BUG_ON(init && (cmd.flags & CMD_ASYNC)); + + if (il_is_lq_table_valid(il, ctx, lq)) + ret = il_send_cmd(il, &cmd); + else + ret = -EINVAL; + + if (cmd.flags & CMD_ASYNC) + return ret; + + if (init) { + D_INFO("init LQ command complete," + " clearing sta addition status for sta %d\n", + lq->sta_id); + spin_lock_irqsave(&il->sta_lock, flags_spin); + il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS; + spin_unlock_irqrestore(&il->sta_lock, flags_spin); + } + return ret; +} +EXPORT_SYMBOL(il_send_lq_cmd); + +int il_mac_sta_remove(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta) +{ + struct il_priv *il = hw->priv; + struct il_station_priv_common *sta_common = (void *)sta->drv_priv; + int ret; + + D_INFO("received request to remove station %pM\n", + sta->addr); + mutex_lock(&il->mutex); + D_INFO("proceeding to remove station %pM\n", + sta->addr); + ret = il_remove_station(il, sta_common->sta_id, sta->addr); + if (ret) + IL_ERR("Error removing station %pM\n", + sta->addr); + mutex_unlock(&il->mutex); + return ret; +} +EXPORT_SYMBOL(il_mac_sta_remove); + +/************************** RX-FUNCTIONS ****************************/ +/* + * Rx theory of operation + * + * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs), + * each of which point to Receive Buffers to be filled by the NIC. These get + * used not only for Rx frames, but for any command response or notification + * from the NIC. The driver and NIC manage the Rx buffers by means + * of idxes into the circular buffer. + * + * Rx Queue Indexes + * The host/firmware share two idx registers for managing the Rx buffers. + * + * The READ idx maps to the first position that the firmware may be writing + * to -- the driver can read up to (but not including) this position and get + * good data. + * The READ idx is managed by the firmware once the card is enabled. + * + * The WRITE idx maps to the last position the driver has read from -- the + * position preceding WRITE is the last slot the firmware can place a packet. + * + * The queue is empty (no good data) if WRITE = READ - 1, and is full if + * WRITE = READ. + * + * During initialization, the host sets up the READ queue position to the first + * IDX position, and WRITE to the last (READ - 1 wrapped) + * + * When the firmware places a packet in a buffer, it will advance the READ idx + * and fire the RX interrupt. The driver can then query the READ idx and + * process as many packets as possible, moving the WRITE idx forward as it + * resets the Rx queue buffers with new memory. + * + * The management in the driver is as follows: + * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When + * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled + * to replenish the iwl->rxq->rx_free. + * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the + * iwl->rxq is replenished and the READ IDX is updated (updating the + * 'processed' and 'read' driver idxes as well) + * + A received packet is processed and handed to the kernel network stack, + * detached from the iwl->rxq. The driver 'processed' idx is updated. + * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free + * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ + * IDX is not incremented and iwl->status(RX_STALLED) is set. If there + * were enough free buffers and RX_STALLED is set it is cleared. + * + * + * Driver sequence: + * + * il_rx_queue_alloc() Allocates rx_free + * il_rx_replenish() Replenishes rx_free list from rx_used, and calls + * il_rx_queue_restock + * il_rx_queue_restock() Moves available buffers from rx_free into Rx + * queue, updates firmware pointers, and updates + * the WRITE idx. If insufficient rx_free buffers + * are available, schedules il_rx_replenish + * + * -- enable interrupts -- + * ISR - il_rx() Detach il_rx_bufs from pool up to the + * READ IDX, detaching the SKB from the pool. + * Moves the packet buffer from queue to rx_used. + * Calls il_rx_queue_restock to refill any empty + * slots. + * ... + * + */ + +/** + * il_rx_queue_space - Return number of free slots available in queue. + */ +int il_rx_queue_space(const struct il_rx_queue *q) +{ + int s = q->read - q->write; + if (s <= 0) + s += RX_QUEUE_SIZE; + /* keep some buffer to not confuse full and empty queue */ + s -= 2; + if (s < 0) + s = 0; + return s; +} +EXPORT_SYMBOL(il_rx_queue_space); + +/** + * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue + */ +void +il_rx_queue_update_write_ptr(struct il_priv *il, + struct il_rx_queue *q) +{ + unsigned long flags; + u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg; + u32 reg; + + spin_lock_irqsave(&q->lock, flags); + + if (q->need_update == 0) + goto exit_unlock; + + /* If power-saving is in use, make sure device is awake */ + if (test_bit(S_POWER_PMI, &il->status)) { + reg = _il_rd(il, CSR_UCODE_DRV_GP1); + + if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { + D_INFO( + "Rx queue requesting wakeup," + " GP1 = 0x%x\n", reg); + il_set_bit(il, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); + goto exit_unlock; + } + + q->write_actual = (q->write & ~0x7); + il_wr(il, rx_wrt_ptr_reg, + q->write_actual); + + /* Else device is assumed to be awake */ + } else { + /* Device expects a multiple of 8 */ + q->write_actual = (q->write & ~0x7); + il_wr(il, rx_wrt_ptr_reg, + q->write_actual); + } + + q->need_update = 0; + + exit_unlock: + spin_unlock_irqrestore(&q->lock, flags); +} +EXPORT_SYMBOL(il_rx_queue_update_write_ptr); + +int il_rx_queue_alloc(struct il_priv *il) +{ + struct il_rx_queue *rxq = &il->rxq; + struct device *dev = &il->pci_dev->dev; + int i; + + spin_lock_init(&rxq->lock); + INIT_LIST_HEAD(&rxq->rx_free); + INIT_LIST_HEAD(&rxq->rx_used); + + /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */ + rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma, + GFP_KERNEL); + if (!rxq->bd) + goto err_bd; + + rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status), + &rxq->rb_stts_dma, GFP_KERNEL); + if (!rxq->rb_stts) + goto err_rb; + + /* Fill the rx_used queue with _all_ of the Rx buffers */ + for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) + list_add_tail(&rxq->pool[i].list, &rxq->rx_used); + + /* Set us so that we have processed and used all buffers, but have + * not restocked the Rx queue with fresh buffers */ + rxq->read = rxq->write = 0; + rxq->write_actual = 0; + rxq->free_count = 0; + rxq->need_update = 0; + return 0; + +err_rb: + dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, + rxq->bd_dma); +err_bd: + return -ENOMEM; +} +EXPORT_SYMBOL(il_rx_queue_alloc); + + +void il_hdl_spectrum_measurement(struct il_priv *il, + struct il_rx_buf *rxb) +{ + struct il_rx_pkt *pkt = rxb_addr(rxb); + struct il_spectrum_notification *report = &(pkt->u.spectrum_notif); + + if (!report->state) { + D_11H( + "Spectrum Measure Notification: Start\n"); + return; + } + + memcpy(&il->measure_report, report, sizeof(*report)); + il->measurement_status |= MEASUREMENT_READY; +} +EXPORT_SYMBOL(il_hdl_spectrum_measurement); + +/* + * returns non-zero if packet should be dropped + */ +int il_set_decrypted_flag(struct il_priv *il, + struct ieee80211_hdr *hdr, + u32 decrypt_res, + struct ieee80211_rx_status *stats) +{ + u16 fc = le16_to_cpu(hdr->frame_control); + + /* + * All contexts have the same setting here due to it being + * a module parameter, so OK to check any context. + */ + if (il->ctx.active.filter_flags & + RXON_FILTER_DIS_DECRYPT_MSK) + return 0; + + if (!(fc & IEEE80211_FCTL_PROTECTED)) + return 0; + + D_RX("decrypt_res:0x%x\n", decrypt_res); + switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { + case RX_RES_STATUS_SEC_TYPE_TKIP: + /* The uCode has got a bad phase 1 Key, pushes the packet. + * Decryption will be done in SW. */ + if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == + RX_RES_STATUS_BAD_KEY_TTAK) + break; + + case RX_RES_STATUS_SEC_TYPE_WEP: + if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == + RX_RES_STATUS_BAD_ICV_MIC) { + /* bad ICV, the packet is destroyed since the + * decryption is inplace, drop it */ + D_RX("Packet destroyed\n"); + return -1; + } + case RX_RES_STATUS_SEC_TYPE_CCMP: + if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == + RX_RES_STATUS_DECRYPT_OK) { + D_RX("hw decrypt successfully!!!\n"); + stats->flag |= RX_FLAG_DECRYPTED; + } + break; + + default: + break; + } + return 0; +} +EXPORT_SYMBOL(il_set_decrypted_flag); + +/** + * il_txq_update_write_ptr - Send new write idx to hardware + */ +void +il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq) +{ + u32 reg = 0; + int txq_id = txq->q.id; + + if (txq->need_update == 0) + return; + + /* if we're trying to save power */ + if (test_bit(S_POWER_PMI, &il->status)) { + /* wake up nic if it's powered down ... + * uCode will wake up, and interrupt us again, so next + * time we'll skip this part. */ + reg = _il_rd(il, CSR_UCODE_DRV_GP1); + + if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { + D_INFO( + "Tx queue %d requesting wakeup," + " GP1 = 0x%x\n", txq_id, reg); + il_set_bit(il, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); + return; + } + + il_wr(il, HBUS_TARG_WRPTR, + txq->q.write_ptr | (txq_id << 8)); + + /* + * else not in power-save mode, + * uCode will never sleep when we're + * trying to tx (during RFKILL, we're not trying to tx). + */ + } else + _il_wr(il, HBUS_TARG_WRPTR, + txq->q.write_ptr | (txq_id << 8)); + txq->need_update = 0; +} +EXPORT_SYMBOL(il_txq_update_write_ptr); + +/** + * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's + */ +void il_tx_queue_unmap(struct il_priv *il, int txq_id) +{ + struct il_tx_queue *txq = &il->txq[txq_id]; + struct il_queue *q = &txq->q; + + if (q->n_bd == 0) + return; + + while (q->write_ptr != q->read_ptr) { + il->cfg->ops->lib->txq_free_tfd(il, txq); + q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd); + } +} +EXPORT_SYMBOL(il_tx_queue_unmap); + +/** + * il_tx_queue_free - Deallocate DMA queue. + * @txq: Transmit queue to deallocate. + * + * Empty queue by removing and destroying all BD's. + * Free all buffers. + * 0-fill, but do not free "txq" descriptor structure. + */ +void il_tx_queue_free(struct il_priv *il, int txq_id) +{ + struct il_tx_queue *txq = &il->txq[txq_id]; + struct device *dev = &il->pci_dev->dev; + int i; + + il_tx_queue_unmap(il, txq_id); + + /* De-alloc array of command/tx buffers */ + for (i = 0; i < TFD_TX_CMD_SLOTS; i++) + kfree(txq->cmd[i]); + + /* De-alloc circular buffer of TFDs */ + if (txq->q.n_bd) + dma_free_coherent(dev, il->hw_params.tfd_size * + txq->q.n_bd, txq->tfds, txq->q.dma_addr); + + /* De-alloc array of per-TFD driver data */ + kfree(txq->txb); + txq->txb = NULL; + + /* deallocate arrays */ + kfree(txq->cmd); + kfree(txq->meta); + txq->cmd = NULL; + txq->meta = NULL; + + /* 0-fill queue descriptor structure */ + memset(txq, 0, sizeof(*txq)); +} +EXPORT_SYMBOL(il_tx_queue_free); + +/** + * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue + */ +void il_cmd_queue_unmap(struct il_priv *il) +{ + struct il_tx_queue *txq = &il->txq[il->cmd_queue]; + struct il_queue *q = &txq->q; + int i; + + if (q->n_bd == 0) + return; + + while (q->read_ptr != q->write_ptr) { + i = il_get_cmd_idx(q, q->read_ptr, 0); + + if (txq->meta[i].flags & CMD_MAPPED) { + pci_unmap_single(il->pci_dev, + dma_unmap_addr(&txq->meta[i], mapping), + dma_unmap_len(&txq->meta[i], len), + PCI_DMA_BIDIRECTIONAL); + txq->meta[i].flags = 0; + } + + q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd); + } + + i = q->n_win; + if (txq->meta[i].flags & CMD_MAPPED) { + pci_unmap_single(il->pci_dev, + dma_unmap_addr(&txq->meta[i], mapping), + dma_unmap_len(&txq->meta[i], len), + PCI_DMA_BIDIRECTIONAL); + txq->meta[i].flags = 0; + } +} +EXPORT_SYMBOL(il_cmd_queue_unmap); + +/** + * il_cmd_queue_free - Deallocate DMA queue. + * @txq: Transmit queue to deallocate. + * + * Empty queue by removing and destroying all BD's. + * Free all buffers. + * 0-fill, but do not free "txq" descriptor structure. + */ +void il_cmd_queue_free(struct il_priv *il) +{ + struct il_tx_queue *txq = &il->txq[il->cmd_queue]; + struct device *dev = &il->pci_dev->dev; + int i; + + il_cmd_queue_unmap(il); + + /* De-alloc array of command/tx buffers */ + for (i = 0; i <= TFD_CMD_SLOTS; i++) + kfree(txq->cmd[i]); + + /* De-alloc circular buffer of TFDs */ + if (txq->q.n_bd) + dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd, + txq->tfds, txq->q.dma_addr); + + /* deallocate arrays */ + kfree(txq->cmd); + kfree(txq->meta); + txq->cmd = NULL; + txq->meta = NULL; + + /* 0-fill queue descriptor structure */ + memset(txq, 0, sizeof(*txq)); +} +EXPORT_SYMBOL(il_cmd_queue_free); + +/*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** + * DMA services + * + * Theory of operation + * + * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer + * of buffer descriptors, each of which points to one or more data buffers for + * the device to read from or fill. Driver and device exchange status of each + * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty + * entries in each circular buffer, to protect against confusing empty and full + * queue states. + * + * The device reads or writes the data in the queues via the device's several + * DMA/FIFO channels. Each queue is mapped to a single DMA channel. + * + * For Tx queue, there are low mark and high mark limits. If, after queuing + * the packet for Tx, free space become < low mark, Tx queue stopped. When + * reclaiming packets (on 'tx done IRQ), if free space become > high mark, + * Tx queue resumed. + * + * See more detailed info in 4965.h. + ***************************************************/ + +int il_queue_space(const struct il_queue *q) +{ + int s = q->read_ptr - q->write_ptr; + + if (q->read_ptr > q->write_ptr) + s -= q->n_bd; + + if (s <= 0) + s += q->n_win; + /* keep some reserve to not confuse empty and full situations */ + s -= 2; + if (s < 0) + s = 0; + return s; +} +EXPORT_SYMBOL(il_queue_space); + + +/** + * il_queue_init - Initialize queue's high/low-water and read/write idxes + */ +static int il_queue_init(struct il_priv *il, struct il_queue *q, + int count, int slots_num, u32 id) +{ + q->n_bd = count; + q->n_win = slots_num; + q->id = id; + + /* count must be power-of-two size, otherwise il_queue_inc_wrap + * and il_queue_dec_wrap are broken. */ + BUG_ON(!is_power_of_2(count)); + + /* slots_num must be power-of-two size, otherwise + * il_get_cmd_idx is broken. */ + BUG_ON(!is_power_of_2(slots_num)); + + q->low_mark = q->n_win / 4; + if (q->low_mark < 4) + q->low_mark = 4; + + q->high_mark = q->n_win / 8; + if (q->high_mark < 2) + q->high_mark = 2; + + q->write_ptr = q->read_ptr = 0; + + return 0; +} + +/** + * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue + */ +static int il_tx_queue_alloc(struct il_priv *il, + struct il_tx_queue *txq, u32 id) +{ + struct device *dev = &il->pci_dev->dev; + size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX; + + /* Driver ilate data, only for Tx (not command) queues, + * not shared with device. */ + if (id != il->cmd_queue) { + txq->txb = kzalloc(sizeof(txq->txb[0]) * + TFD_QUEUE_SIZE_MAX, GFP_KERNEL); + if (!txq->txb) { + IL_ERR("kmalloc for auxiliary BD " + "structures failed\n"); + goto error; + } + } else { + txq->txb = NULL; + } + + /* Circular buffer of transmit frame descriptors (TFDs), + * shared with device */ + txq->tfds = dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, + GFP_KERNEL); + if (!txq->tfds) { + IL_ERR("pci_alloc_consistent(%zd) failed\n", tfd_sz); + goto error; + } + txq->q.id = id; + + return 0; + + error: + kfree(txq->txb); + txq->txb = NULL; + + return -ENOMEM; +} + +/** + * il_tx_queue_init - Allocate and initialize one tx/cmd queue + */ +int il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq, + int slots_num, u32 txq_id) +{ + int i, len; + int ret; + int actual_slots = slots_num; + + /* + * Alloc buffer array for commands (Tx or other types of commands). + * For the command queue (#4/#9), allocate command space + one big + * command for scan, since scan command is very huge; the system will + * not have two scans at the same time, so only one is needed. + * For normal Tx queues (all other queues), no super-size command + * space is needed. + */ + if (txq_id == il->cmd_queue) + actual_slots++; + + txq->meta = kzalloc(sizeof(struct il_cmd_meta) * actual_slots, + GFP_KERNEL); + txq->cmd = kzalloc(sizeof(struct il_device_cmd *) * actual_slots, + GFP_KERNEL); + + if (!txq->meta || !txq->cmd) + goto out_free_arrays; + + len = sizeof(struct il_device_cmd); + for (i = 0; i < actual_slots; i++) { + /* only happens for cmd queue */ + if (i == slots_num) + len = IL_MAX_CMD_SIZE; + + txq->cmd[i] = kmalloc(len, GFP_KERNEL); + if (!txq->cmd[i]) + goto err; + } + + /* Alloc driver data array and TFD circular buffer */ + ret = il_tx_queue_alloc(il, txq, txq_id); + if (ret) + goto err; + + txq->need_update = 0; + + /* + * For the default queues 0-3, set up the swq_id + * already -- all others need to get one later + * (if they need one at all). + */ + if (txq_id < 4) + il_set_swq_id(txq, txq_id, txq_id); + + /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise + * il_queue_inc_wrap and il_queue_dec_wrap are broken. */ + BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); + + /* Initialize queue's high/low-water marks, and head/tail idxes */ + il_queue_init(il, &txq->q, + TFD_QUEUE_SIZE_MAX, slots_num, txq_id); + + /* Tell device where to find queue */ + il->cfg->ops->lib->txq_init(il, txq); + + return 0; +err: + for (i = 0; i < actual_slots; i++) + kfree(txq->cmd[i]); +out_free_arrays: + kfree(txq->meta); + kfree(txq->cmd); + + return -ENOMEM; +} +EXPORT_SYMBOL(il_tx_queue_init); + +void il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq, + int slots_num, u32 txq_id) +{ + int actual_slots = slots_num; + + if (txq_id == il->cmd_queue) + actual_slots++; + + memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots); + + txq->need_update = 0; + + /* Initialize queue's high/low-water marks, and head/tail idxes */ + il_queue_init(il, &txq->q, + TFD_QUEUE_SIZE_MAX, slots_num, txq_id); + + /* Tell device where to find queue */ + il->cfg->ops->lib->txq_init(il, txq); +} +EXPORT_SYMBOL(il_tx_queue_reset); + +/*************** HOST COMMAND QUEUE FUNCTIONS *****/ + +/** + * il_enqueue_hcmd - enqueue a uCode command + * @il: device ilate data point + * @cmd: a point to the ucode command structure + * + * The function returns < 0 values to indicate the operation is + * failed. On success, it turns the idx (> 0) of command in the + * command queue. + */ +int il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd) +{ + struct il_tx_queue *txq = &il->txq[il->cmd_queue]; + struct il_queue *q = &txq->q; + struct il_device_cmd *out_cmd; + struct il_cmd_meta *out_meta; + dma_addr_t phys_addr; + unsigned long flags; + int len; + u32 idx; + u16 fix_size; + + cmd->len = il->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len); + fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr)); + + /* If any of the command structures end up being larger than + * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then + * we will need to increase the size of the TFD entries + * Also, check to see if command buffer should not exceed the size + * of device_cmd and max_cmd_size. */ + BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) && + !(cmd->flags & CMD_SIZE_HUGE)); + BUG_ON(fix_size > IL_MAX_CMD_SIZE); + + if (il_is_rfkill(il) || il_is_ctkill(il)) { + IL_WARN("Not sending command - %s KILL\n", + il_is_rfkill(il) ? "RF" : "CT"); + return -EIO; + } + + spin_lock_irqsave(&il->hcmd_lock, flags); + + if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) { + spin_unlock_irqrestore(&il->hcmd_lock, flags); + + IL_ERR("Restarting adapter due to command queue full\n"); + queue_work(il->workqueue, &il->restart); + return -ENOSPC; + } + + idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE); + out_cmd = txq->cmd[idx]; + out_meta = &txq->meta[idx]; + + if (WARN_ON(out_meta->flags & CMD_MAPPED)) { + spin_unlock_irqrestore(&il->hcmd_lock, flags); + return -ENOSPC; + } + + memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */ + out_meta->flags = cmd->flags | CMD_MAPPED; + if (cmd->flags & CMD_WANT_SKB) + out_meta->source = cmd; + if (cmd->flags & CMD_ASYNC) + out_meta->callback = cmd->callback; + + out_cmd->hdr.cmd = cmd->id; + memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len); + + /* At this point, the out_cmd now has all of the incoming cmd + * information */ + + out_cmd->hdr.flags = 0; + out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | + IDX_TO_SEQ(q->write_ptr)); + if (cmd->flags & CMD_SIZE_HUGE) + out_cmd->hdr.sequence |= SEQ_HUGE_FRAME; + len = sizeof(struct il_device_cmd); + if (idx == TFD_CMD_SLOTS) + len = IL_MAX_CMD_SIZE; + +#ifdef CONFIG_IWLEGACY_DEBUG + switch (out_cmd->hdr.cmd) { + case C_TX_LINK_QUALITY_CMD: + case C_SENSITIVITY: + D_HC_DUMP( + "Sending command %s (#%x), seq: 0x%04X, " + "%d bytes at %d[%d]:%d\n", + il_get_cmd_string(out_cmd->hdr.cmd), + out_cmd->hdr.cmd, + le16_to_cpu(out_cmd->hdr.sequence), fix_size, + q->write_ptr, idx, il->cmd_queue); + break; + default: + D_HC("Sending command %s (#%x), seq: 0x%04X, " + "%d bytes at %d[%d]:%d\n", + il_get_cmd_string(out_cmd->hdr.cmd), + out_cmd->hdr.cmd, + le16_to_cpu(out_cmd->hdr.sequence), fix_size, + q->write_ptr, idx, il->cmd_queue); + } +#endif + txq->need_update = 1; + + if (il->cfg->ops->lib->txq_update_byte_cnt_tbl) + /* Set up entry in queue's byte count circular buffer */ + il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0); + + phys_addr = pci_map_single(il->pci_dev, &out_cmd->hdr, + fix_size, PCI_DMA_BIDIRECTIONAL); + dma_unmap_addr_set(out_meta, mapping, phys_addr); + dma_unmap_len_set(out_meta, len, fix_size); + + il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq, + phys_addr, fix_size, 1, + U32_PAD(cmd->len)); + + /* Increment and update queue's write idx */ + q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); + il_txq_update_write_ptr(il, txq); + + spin_unlock_irqrestore(&il->hcmd_lock, flags); + return idx; +} + +/** + * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd + * + * When FW advances 'R' idx, all entries between old and new 'R' idx + * need to be reclaimed. As result, some free space forms. If there is + * enough free space (> low mark), wake the stack that feeds us. + */ +static void il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, + int idx, int cmd_idx) +{ + struct il_tx_queue *txq = &il->txq[txq_id]; + struct il_queue *q = &txq->q; + int nfreed = 0; + + if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { + IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " + "is out of range [0-%d] %d %d.\n", txq_id, + idx, q->n_bd, q->write_ptr, q->read_ptr); + return; + } + + for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; + q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { + + if (nfreed++ > 0) { + IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx, + q->write_ptr, q->read_ptr); + queue_work(il->workqueue, &il->restart); + } + + } +} + +/** + * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them + * @rxb: Rx buffer to reclaim + * + * If an Rx buffer has an async callback associated with it the callback + * will be executed. The attached skb (if present) will only be freed + * if the callback returns 1 + */ +void +il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb) +{ + struct il_rx_pkt *pkt = rxb_addr(rxb); + u16 sequence = le16_to_cpu(pkt->hdr.sequence); + int txq_id = SEQ_TO_QUEUE(sequence); + int idx = SEQ_TO_IDX(sequence); + int cmd_idx; + bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME); + struct il_device_cmd *cmd; + struct il_cmd_meta *meta; + struct il_tx_queue *txq = &il->txq[il->cmd_queue]; + unsigned long flags; + + /* If a Tx command is being handled and it isn't in the actual + * command queue then there a command routing bug has been introduced + * in the queue management code. */ + if (WARN(txq_id != il->cmd_queue, + "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n", + txq_id, il->cmd_queue, sequence, + il->txq[il->cmd_queue].q.read_ptr, + il->txq[il->cmd_queue].q.write_ptr)) { + il_print_hex_error(il, pkt, 32); + return; + } + + cmd_idx = il_get_cmd_idx(&txq->q, idx, huge); + cmd = txq->cmd[cmd_idx]; + meta = &txq->meta[cmd_idx]; + + txq->time_stamp = jiffies; + + pci_unmap_single(il->pci_dev, + dma_unmap_addr(meta, mapping), + dma_unmap_len(meta, len), + PCI_DMA_BIDIRECTIONAL); + + /* Input error checking is done when commands are added to queue. */ + if (meta->flags & CMD_WANT_SKB) { + meta->source->reply_page = (unsigned long)rxb_addr(rxb); + rxb->page = NULL; + } else if (meta->callback) + meta->callback(il, cmd, pkt); + + spin_lock_irqsave(&il->hcmd_lock, flags); + + il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx); + + if (!(meta->flags & CMD_ASYNC)) { + clear_bit(S_HCMD_ACTIVE, &il->status); + D_INFO("Clearing HCMD_ACTIVE for command %s\n", + il_get_cmd_string(cmd->hdr.cmd)); + wake_up(&il->wait_command_queue); + } + + /* Mark as unmapped */ + meta->flags = 0; + + spin_unlock_irqrestore(&il->hcmd_lock, flags); +} +EXPORT_SYMBOL(il_tx_cmd_complete); MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965"); MODULE_VERSION(IWLWIFI_VERSION); diff --git a/drivers/net/wireless/iwlegacy/iwl-eeprom.c b/drivers/net/wireless/iwlegacy/iwl-eeprom.c deleted file mode 100644 index ee5ad69..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-eeprom.c +++ /dev/null @@ -1,553 +0,0 @@ -/****************************************************************************** - * - * This file is provided under a dual BSD/GPLv2 license. When using or - * redistributing this file, you may do so under either license. - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * Contact Information: - * Intel Linux Wireless - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - * BSD LICENSE - * - * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - *****************************************************************************/ - - -#include -#include -#include -#include - -#include - -#include "iwl-commands.h" -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-debug.h" -#include "iwl-eeprom.h" -#include "iwl-io.h" - -/************************** EEPROM BANDS **************************** - * - * The il_eeprom_band definitions below provide the mapping from the - * EEPROM contents to the specific channel number supported for each - * band. - * - * For example, il_priv->eeprom.band_3_channels[4] from the band_3 - * definition below maps to physical channel 42 in the 5.2GHz spectrum. - * The specific geography and calibration information for that channel - * is contained in the eeprom map itself. - * - * During init, we copy the eeprom information and channel map - * information into il->channel_info_24/52 and il->channel_map_24/52 - * - * channel_map_24/52 provides the idx in the channel_info array for a - * given channel. We have to have two separate maps as there is channel - * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and - * band_2 - * - * A value of 0xff stored in the channel_map indicates that the channel - * is not supported by the hardware at all. - * - * A value of 0xfe in the channel_map indicates that the channel is not - * valid for Tx with the current hardware. This means that - * while the system can tune and receive on a given channel, it may not - * be able to associate or transmit any frames on that - * channel. There is no corresponding channel information for that - * entry. - * - *********************************************************************/ - -/* 2.4 GHz */ -const u8 il_eeprom_band_1[14] = { - 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 -}; - -/* 5.2 GHz bands */ -static const u8 il_eeprom_band_2[] = { /* 4915-5080MHz */ - 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16 -}; - -static const u8 il_eeprom_band_3[] = { /* 5170-5320MHz */ - 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 -}; - -static const u8 il_eeprom_band_4[] = { /* 5500-5700MHz */ - 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 -}; - -static const u8 il_eeprom_band_5[] = { /* 5725-5825MHz */ - 145, 149, 153, 157, 161, 165 -}; - -static const u8 il_eeprom_band_6[] = { /* 2.4 ht40 channel */ - 1, 2, 3, 4, 5, 6, 7 -}; - -static const u8 il_eeprom_band_7[] = { /* 5.2 ht40 channel */ - 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157 -}; - -/****************************************************************************** - * - * EEPROM related functions - * -******************************************************************************/ - -static int il_eeprom_verify_signature(struct il_priv *il) -{ - u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK; - int ret = 0; - - D_EEPROM("EEPROM signature=0x%08x\n", gp); - switch (gp) { - case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K: - case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K: - break; - default: - IL_ERR("bad EEPROM signature," - "EEPROM_GP=0x%08x\n", gp); - ret = -ENOENT; - break; - } - return ret; -} - -const u8 -*il_eeprom_query_addr(const struct il_priv *il, size_t offset) -{ - BUG_ON(offset >= il->cfg->base_params->eeprom_size); - return &il->eeprom[offset]; -} -EXPORT_SYMBOL(il_eeprom_query_addr); - -u16 il_eeprom_query16(const struct il_priv *il, size_t offset) -{ - if (!il->eeprom) - return 0; - return (u16)il->eeprom[offset] | ((u16)il->eeprom[offset + 1] << 8); -} -EXPORT_SYMBOL(il_eeprom_query16); - -/** - * il_eeprom_init - read EEPROM contents - * - * Load the EEPROM contents from adapter into il->eeprom - * - * NOTE: This routine uses the non-debug IO access functions. - */ -int il_eeprom_init(struct il_priv *il) -{ - __le16 *e; - u32 gp = _il_rd(il, CSR_EEPROM_GP); - int sz; - int ret; - u16 addr; - - /* allocate eeprom */ - sz = il->cfg->base_params->eeprom_size; - D_EEPROM("NVM size = %d\n", sz); - il->eeprom = kzalloc(sz, GFP_KERNEL); - if (!il->eeprom) { - ret = -ENOMEM; - goto alloc_err; - } - e = (__le16 *)il->eeprom; - - il->cfg->ops->lib->apm_ops.init(il); - - ret = il_eeprom_verify_signature(il); - if (ret < 0) { - IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp); - ret = -ENOENT; - goto err; - } - - /* Make sure driver (instead of uCode) is allowed to read EEPROM */ - ret = il->cfg->ops->lib->eeprom_ops.acquire_semaphore(il); - if (ret < 0) { - IL_ERR("Failed to acquire EEPROM semaphore.\n"); - ret = -ENOENT; - goto err; - } - - /* eeprom is an array of 16bit values */ - for (addr = 0; addr < sz; addr += sizeof(u16)) { - u32 r; - - _il_wr(il, CSR_EEPROM_REG, - CSR_EEPROM_REG_MSK_ADDR & (addr << 1)); - - ret = _il_poll_bit(il, CSR_EEPROM_REG, - CSR_EEPROM_REG_READ_VALID_MSK, - CSR_EEPROM_REG_READ_VALID_MSK, - IL_EEPROM_ACCESS_TIMEOUT); - if (ret < 0) { - IL_ERR("Time out reading EEPROM[%d]\n", - addr); - goto done; - } - r = _il_rd(il, CSR_EEPROM_REG); - e[addr / 2] = cpu_to_le16(r >> 16); - } - - D_EEPROM("NVM Type: %s, version: 0x%x\n", - "EEPROM", - il_eeprom_query16(il, EEPROM_VERSION)); - - ret = 0; -done: - il->cfg->ops->lib->eeprom_ops.release_semaphore(il); - -err: - if (ret) - il_eeprom_free(il); - /* Reset chip to save power until we load uCode during "up". */ - il_apm_stop(il); -alloc_err: - return ret; -} -EXPORT_SYMBOL(il_eeprom_init); - -void il_eeprom_free(struct il_priv *il) -{ - kfree(il->eeprom); - il->eeprom = NULL; -} -EXPORT_SYMBOL(il_eeprom_free); - -static void il_init_band_reference(const struct il_priv *il, - int eep_band, int *eeprom_ch_count, - const struct il_eeprom_channel **eeprom_ch_info, - const u8 **eeprom_ch_idx) -{ - u32 offset = il->cfg->ops->lib-> - eeprom_ops.regulatory_bands[eep_band - 1]; - switch (eep_band) { - case 1: /* 2.4GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1); - *eeprom_ch_info = (struct il_eeprom_channel *) - il_eeprom_query_addr(il, offset); - *eeprom_ch_idx = il_eeprom_band_1; - break; - case 2: /* 4.9GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2); - *eeprom_ch_info = (struct il_eeprom_channel *) - il_eeprom_query_addr(il, offset); - *eeprom_ch_idx = il_eeprom_band_2; - break; - case 3: /* 5.2GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3); - *eeprom_ch_info = (struct il_eeprom_channel *) - il_eeprom_query_addr(il, offset); - *eeprom_ch_idx = il_eeprom_band_3; - break; - case 4: /* 5.5GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4); - *eeprom_ch_info = (struct il_eeprom_channel *) - il_eeprom_query_addr(il, offset); - *eeprom_ch_idx = il_eeprom_band_4; - break; - case 5: /* 5.7GHz band */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5); - *eeprom_ch_info = (struct il_eeprom_channel *) - il_eeprom_query_addr(il, offset); - *eeprom_ch_idx = il_eeprom_band_5; - break; - case 6: /* 2.4GHz ht40 channels */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6); - *eeprom_ch_info = (struct il_eeprom_channel *) - il_eeprom_query_addr(il, offset); - *eeprom_ch_idx = il_eeprom_band_6; - break; - case 7: /* 5 GHz ht40 channels */ - *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7); - *eeprom_ch_info = (struct il_eeprom_channel *) - il_eeprom_query_addr(il, offset); - *eeprom_ch_idx = il_eeprom_band_7; - break; - default: - BUG(); - } -} - -#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \ - ? # x " " : "") -/** - * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il. - * - * Does not set up a command, or touch hardware. - */ -static int il_mod_ht40_chan_info(struct il_priv *il, - enum ieee80211_band band, u16 channel, - const struct il_eeprom_channel *eeprom_ch, - u8 clear_ht40_extension_channel) -{ - struct il_channel_info *ch_info; - - ch_info = (struct il_channel_info *) - il_get_channel_info(il, band, channel); - - if (!il_is_channel_valid(ch_info)) - return -1; - - D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):" - " Ad-Hoc %ssupported\n", - ch_info->channel, - il_is_channel_a_band(ch_info) ? - "5.2" : "2.4", - CHECK_AND_PRINT(IBSS), - CHECK_AND_PRINT(ACTIVE), - CHECK_AND_PRINT(RADAR), - CHECK_AND_PRINT(WIDE), - CHECK_AND_PRINT(DFS), - eeprom_ch->flags, - eeprom_ch->max_power_avg, - ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) - && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? - "" : "not "); - - ch_info->ht40_eeprom = *eeprom_ch; - ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg; - ch_info->ht40_flags = eeprom_ch->flags; - if (eeprom_ch->flags & EEPROM_CHANNEL_VALID) - ch_info->ht40_extension_channel &= - ~clear_ht40_extension_channel; - - return 0; -} - -#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \ - ? # x " " : "") - -/** - * il_init_channel_map - Set up driver's info for all possible channels - */ -int il_init_channel_map(struct il_priv *il) -{ - int eeprom_ch_count = 0; - const u8 *eeprom_ch_idx = NULL; - const struct il_eeprom_channel *eeprom_ch_info = NULL; - int band, ch; - struct il_channel_info *ch_info; - - if (il->channel_count) { - D_EEPROM("Channel map already initialized.\n"); - return 0; - } - - D_EEPROM("Initializing regulatory info from EEPROM\n"); - - il->channel_count = - ARRAY_SIZE(il_eeprom_band_1) + - ARRAY_SIZE(il_eeprom_band_2) + - ARRAY_SIZE(il_eeprom_band_3) + - ARRAY_SIZE(il_eeprom_band_4) + - ARRAY_SIZE(il_eeprom_band_5); - - D_EEPROM("Parsing data for %d channels.\n", - il->channel_count); - - il->channel_info = kzalloc(sizeof(struct il_channel_info) * - il->channel_count, GFP_KERNEL); - if (!il->channel_info) { - IL_ERR("Could not allocate channel_info\n"); - il->channel_count = 0; - return -ENOMEM; - } - - ch_info = il->channel_info; - - /* Loop through the 5 EEPROM bands adding them in order to the - * channel map we maintain (that contains additional information than - * what just in the EEPROM) */ - for (band = 1; band <= 5; band++) { - - il_init_band_reference(il, band, &eeprom_ch_count, - &eeprom_ch_info, &eeprom_ch_idx); - - /* Loop through each band adding each of the channels */ - for (ch = 0; ch < eeprom_ch_count; ch++) { - ch_info->channel = eeprom_ch_idx[ch]; - ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ : - IEEE80211_BAND_5GHZ; - - /* permanently store EEPROM's channel regulatory flags - * and max power in channel info database. */ - ch_info->eeprom = eeprom_ch_info[ch]; - - /* Copy the run-time flags so they are there even on - * invalid channels */ - ch_info->flags = eeprom_ch_info[ch].flags; - /* First write that ht40 is not enabled, and then enable - * one by one */ - ch_info->ht40_extension_channel = - IEEE80211_CHAN_NO_HT40; - - if (!(il_is_channel_valid(ch_info))) { - D_EEPROM( - "Ch. %d Flags %x [%sGHz] - " - "No traffic\n", - ch_info->channel, - ch_info->flags, - il_is_channel_a_band(ch_info) ? - "5.2" : "2.4"); - ch_info++; - continue; - } - - /* Initialize regulatory-based run-time data */ - ch_info->max_power_avg = ch_info->curr_txpow = - eeprom_ch_info[ch].max_power_avg; - ch_info->scan_power = eeprom_ch_info[ch].max_power_avg; - ch_info->min_power = 0; - - D_EEPROM("Ch. %d [%sGHz] " - "%s%s%s%s%s%s(0x%02x %ddBm):" - " Ad-Hoc %ssupported\n", - ch_info->channel, - il_is_channel_a_band(ch_info) ? - "5.2" : "2.4", - CHECK_AND_PRINT_I(VALID), - CHECK_AND_PRINT_I(IBSS), - CHECK_AND_PRINT_I(ACTIVE), - CHECK_AND_PRINT_I(RADAR), - CHECK_AND_PRINT_I(WIDE), - CHECK_AND_PRINT_I(DFS), - eeprom_ch_info[ch].flags, - eeprom_ch_info[ch].max_power_avg, - ((eeprom_ch_info[ch]. - flags & EEPROM_CHANNEL_IBSS) - && !(eeprom_ch_info[ch]. - flags & EEPROM_CHANNEL_RADAR)) - ? "" : "not "); - - ch_info++; - } - } - - /* Check if we do have HT40 channels */ - if (il->cfg->ops->lib->eeprom_ops.regulatory_bands[5] == - EEPROM_REGULATORY_BAND_NO_HT40 && - il->cfg->ops->lib->eeprom_ops.regulatory_bands[6] == - EEPROM_REGULATORY_BAND_NO_HT40) - return 0; - - /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */ - for (band = 6; band <= 7; band++) { - enum ieee80211_band ieeeband; - - il_init_band_reference(il, band, &eeprom_ch_count, - &eeprom_ch_info, &eeprom_ch_idx); - - /* EEPROM band 6 is 2.4, band 7 is 5 GHz */ - ieeeband = - (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; - - /* Loop through each band adding each of the channels */ - for (ch = 0; ch < eeprom_ch_count; ch++) { - /* Set up driver's info for lower half */ - il_mod_ht40_chan_info(il, ieeeband, - eeprom_ch_idx[ch], - &eeprom_ch_info[ch], - IEEE80211_CHAN_NO_HT40PLUS); - - /* Set up driver's info for upper half */ - il_mod_ht40_chan_info(il, ieeeband, - eeprom_ch_idx[ch] + 4, - &eeprom_ch_info[ch], - IEEE80211_CHAN_NO_HT40MINUS); - } - } - - return 0; -} -EXPORT_SYMBOL(il_init_channel_map); - -/* - * il_free_channel_map - undo allocations in il_init_channel_map - */ -void il_free_channel_map(struct il_priv *il) -{ - kfree(il->channel_info); - il->channel_count = 0; -} -EXPORT_SYMBOL(il_free_channel_map); - -/** - * il_get_channel_info - Find driver's ilate channel info - * - * Based on band and channel number. - */ -const struct -il_channel_info *il_get_channel_info(const struct il_priv *il, - enum ieee80211_band band, u16 channel) -{ - int i; - - switch (band) { - case IEEE80211_BAND_5GHZ: - for (i = 14; i < il->channel_count; i++) { - if (il->channel_info[i].channel == channel) - return &il->channel_info[i]; - } - break; - case IEEE80211_BAND_2GHZ: - if (channel >= 1 && channel <= 14) - return &il->channel_info[channel - 1]; - break; - default: - BUG(); - } - - return NULL; -} -EXPORT_SYMBOL(il_get_channel_info); diff --git a/drivers/net/wireless/iwlegacy/iwl-hcmd.c b/drivers/net/wireless/iwlegacy/iwl-hcmd.c deleted file mode 100644 index 670a398..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-hcmd.c +++ /dev/null @@ -1,271 +0,0 @@ -/****************************************************************************** - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * Contact Information: - * Intel Linux Wireless - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - *****************************************************************************/ - -#include -#include -#include -#include - -#include "iwl-dev.h" -#include "iwl-debug.h" -#include "iwl-eeprom.h" -#include "iwl-core.h" - - -const char *il_get_cmd_string(u8 cmd) -{ - switch (cmd) { - IL_CMD(N_ALIVE); - IL_CMD(N_ERROR); - IL_CMD(C_RXON); - IL_CMD(C_RXON_ASSOC); - IL_CMD(C_QOS_PARAM); - IL_CMD(C_RXON_TIMING); - IL_CMD(C_ADD_STA); - IL_CMD(C_REM_STA); - IL_CMD(C_WEPKEY); - IL_CMD(N_3945_RX); - IL_CMD(C_TX); - IL_CMD(C_RATE_SCALE); - IL_CMD(C_LEDS); - IL_CMD(C_TX_LINK_QUALITY_CMD); - IL_CMD(C_CHANNEL_SWITCH); - IL_CMD(N_CHANNEL_SWITCH); - IL_CMD(C_SPECTRUM_MEASUREMENT); - IL_CMD(N_SPECTRUM_MEASUREMENT); - IL_CMD(C_POWER_TBL); - IL_CMD(N_PM_SLEEP); - IL_CMD(N_PM_DEBUG_STATS); - IL_CMD(C_SCAN); - IL_CMD(C_SCAN_ABORT); - IL_CMD(N_SCAN_START); - IL_CMD(N_SCAN_RESULTS); - IL_CMD(N_SCAN_COMPLETE); - IL_CMD(N_BEACON); - IL_CMD(C_TX_BEACON); - IL_CMD(C_TX_PWR_TBL); - IL_CMD(C_BT_CONFIG); - IL_CMD(C_STATS); - IL_CMD(N_STATS); - IL_CMD(N_CARD_STATE); - IL_CMD(N_MISSED_BEACONS); - IL_CMD(C_CT_KILL_CONFIG); - IL_CMD(C_SENSITIVITY); - IL_CMD(C_PHY_CALIBRATION); - IL_CMD(N_RX_PHY); - IL_CMD(N_RX_MPDU); - IL_CMD(N_RX); - IL_CMD(N_COMPRESSED_BA); - default: - return "UNKNOWN"; - - } -} -EXPORT_SYMBOL(il_get_cmd_string); - -#define HOST_COMPLETE_TIMEOUT (HZ / 2) - -static void il_generic_cmd_callback(struct il_priv *il, - struct il_device_cmd *cmd, - struct il_rx_pkt *pkt) -{ - if (pkt->hdr.flags & IL_CMD_FAILED_MSK) { - IL_ERR("Bad return from %s (0x%08X)\n", - il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); - return; - } - -#ifdef CONFIG_IWLEGACY_DEBUG - switch (cmd->hdr.cmd) { - case C_TX_LINK_QUALITY_CMD: - case C_SENSITIVITY: - D_HC_DUMP("back from %s (0x%08X)\n", - il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); - break; - default: - D_HC("back from %s (0x%08X)\n", - il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags); - } -#endif -} - -static int -il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd) -{ - int ret; - - BUG_ON(!(cmd->flags & CMD_ASYNC)); - - /* An asynchronous command can not expect an SKB to be set. */ - BUG_ON(cmd->flags & CMD_WANT_SKB); - - /* Assign a generic callback if one is not provided */ - if (!cmd->callback) - cmd->callback = il_generic_cmd_callback; - - if (test_bit(S_EXIT_PENDING, &il->status)) - return -EBUSY; - - ret = il_enqueue_hcmd(il, cmd); - if (ret < 0) { - IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", - il_get_cmd_string(cmd->id), ret); - return ret; - } - return 0; -} - -int il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd) -{ - int cmd_idx; - int ret; - - lockdep_assert_held(&il->mutex); - - BUG_ON(cmd->flags & CMD_ASYNC); - - /* A synchronous command can not have a callback set. */ - BUG_ON(cmd->callback); - - D_INFO("Attempting to send sync command %s\n", - il_get_cmd_string(cmd->id)); - - set_bit(S_HCMD_ACTIVE, &il->status); - D_INFO("Setting HCMD_ACTIVE for command %s\n", - il_get_cmd_string(cmd->id)); - - cmd_idx = il_enqueue_hcmd(il, cmd); - if (cmd_idx < 0) { - ret = cmd_idx; - IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n", - il_get_cmd_string(cmd->id), ret); - goto out; - } - - ret = wait_event_timeout(il->wait_command_queue, - !test_bit(S_HCMD_ACTIVE, &il->status), - HOST_COMPLETE_TIMEOUT); - if (!ret) { - if (test_bit(S_HCMD_ACTIVE, &il->status)) { - IL_ERR( - "Error sending %s: time out after %dms.\n", - il_get_cmd_string(cmd->id), - jiffies_to_msecs(HOST_COMPLETE_TIMEOUT)); - - clear_bit(S_HCMD_ACTIVE, &il->status); - D_INFO( - "Clearing HCMD_ACTIVE for command %s\n", - il_get_cmd_string(cmd->id)); - ret = -ETIMEDOUT; - goto cancel; - } - } - - if (test_bit(S_RF_KILL_HW, &il->status)) { - IL_ERR("Command %s aborted: RF KILL Switch\n", - il_get_cmd_string(cmd->id)); - ret = -ECANCELED; - goto fail; - } - if (test_bit(S_FW_ERROR, &il->status)) { - IL_ERR("Command %s failed: FW Error\n", - il_get_cmd_string(cmd->id)); - ret = -EIO; - goto fail; - } - if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) { - IL_ERR("Error: Response NULL in '%s'\n", - il_get_cmd_string(cmd->id)); - ret = -EIO; - goto cancel; - } - - ret = 0; - goto out; - -cancel: - if (cmd->flags & CMD_WANT_SKB) { - /* - * Cancel the CMD_WANT_SKB flag for the cmd in the - * TX cmd queue. Otherwise in case the cmd comes - * in later, it will possibly set an invalid - * address (cmd->meta.source). - */ - il->txq[il->cmd_queue].meta[cmd_idx].flags &= - ~CMD_WANT_SKB; - } -fail: - if (cmd->reply_page) { - il_free_pages(il, cmd->reply_page); - cmd->reply_page = 0; - } -out: - return ret; -} -EXPORT_SYMBOL(il_send_cmd_sync); - -int il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd) -{ - if (cmd->flags & CMD_ASYNC) - return il_send_cmd_async(il, cmd); - - return il_send_cmd_sync(il, cmd); -} -EXPORT_SYMBOL(il_send_cmd); - -int -il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data) -{ - struct il_host_cmd cmd = { - .id = id, - .len = len, - .data = data, - }; - - return il_send_cmd_sync(il, &cmd); -} -EXPORT_SYMBOL(il_send_cmd_pdu); - -int il_send_cmd_pdu_async(struct il_priv *il, - u8 id, u16 len, const void *data, - void (*callback)(struct il_priv *il, - struct il_device_cmd *cmd, - struct il_rx_pkt *pkt)) -{ - struct il_host_cmd cmd = { - .id = id, - .len = len, - .data = data, - }; - - cmd.flags |= CMD_ASYNC; - cmd.callback = callback; - - return il_send_cmd_async(il, &cmd); -} -EXPORT_SYMBOL(il_send_cmd_pdu_async); diff --git a/drivers/net/wireless/iwlegacy/iwl-led.c b/drivers/net/wireless/iwlegacy/iwl-led.c deleted file mode 100644 index a840c2e..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-led.c +++ /dev/null @@ -1,205 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ - - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-io.h" - -/* default: IL_LED_BLINK(0) using blinking idx table */ -static int led_mode; -module_param(led_mode, int, S_IRUGO); -MODULE_PARM_DESC(led_mode, "0=system default, " - "1=On(RF On)/Off(RF Off), 2=blinking"); - -/* Throughput OFF time(ms) ON time (ms) - * >300 25 25 - * >200 to 300 40 40 - * >100 to 200 55 55 - * >70 to 100 65 65 - * >50 to 70 75 75 - * >20 to 50 85 85 - * >10 to 20 95 95 - * >5 to 10 110 110 - * >1 to 5 130 130 - * >0 to 1 167 167 - * <=0 SOLID ON - */ -static const struct ieee80211_tpt_blink il_blink[] = { - { .throughput = 0, .blink_time = 334 }, - { .throughput = 1 * 1024 - 1, .blink_time = 260 }, - { .throughput = 5 * 1024 - 1, .blink_time = 220 }, - { .throughput = 10 * 1024 - 1, .blink_time = 190 }, - { .throughput = 20 * 1024 - 1, .blink_time = 170 }, - { .throughput = 50 * 1024 - 1, .blink_time = 150 }, - { .throughput = 70 * 1024 - 1, .blink_time = 130 }, - { .throughput = 100 * 1024 - 1, .blink_time = 110 }, - { .throughput = 200 * 1024 - 1, .blink_time = 80 }, - { .throughput = 300 * 1024 - 1, .blink_time = 50 }, -}; - -/* - * Adjust led blink rate to compensate on a MAC Clock difference on every HW - * Led blink rate analysis showed an average deviation of 0% on 3945, - * 5% on 4965 HW. - * Need to compensate on the led on/off time per HW according to the deviation - * to achieve the desired led frequency - * The calculation is: (100-averageDeviation)/100 * blinkTime - * For code efficiency the calculation will be: - * compensation = (100 - averageDeviation) * 64 / 100 - * NewBlinkTime = (compensation * BlinkTime) / 64 - */ -static inline u8 il_blink_compensation(struct il_priv *il, - u8 time, u16 compensation) -{ - if (!compensation) { - IL_ERR("undefined blink compensation: " - "use pre-defined blinking time\n"); - return time; - } - - return (u8)((time * compensation) >> 6); -} - -/* Set led pattern command */ -static int il_led_cmd(struct il_priv *il, - unsigned long on, - unsigned long off) -{ - struct il_led_cmd led_cmd = { - .id = IL_LED_LINK, - .interval = IL_DEF_LED_INTRVL - }; - int ret; - - if (!test_bit(S_READY, &il->status)) - return -EBUSY; - - if (il->blink_on == on && il->blink_off == off) - return 0; - - if (off == 0) { - /* led is SOLID_ON */ - on = IL_LED_SOLID; - } - - D_LED("Led blink time compensation=%u\n", - il->cfg->base_params->led_compensation); - led_cmd.on = il_blink_compensation(il, on, - il->cfg->base_params->led_compensation); - led_cmd.off = il_blink_compensation(il, off, - il->cfg->base_params->led_compensation); - - ret = il->cfg->ops->led->cmd(il, &led_cmd); - if (!ret) { - il->blink_on = on; - il->blink_off = off; - } - return ret; -} - -static void il_led_brightness_set(struct led_classdev *led_cdev, - enum led_brightness brightness) -{ - struct il_priv *il = container_of(led_cdev, struct il_priv, led); - unsigned long on = 0; - - if (brightness > 0) - on = IL_LED_SOLID; - - il_led_cmd(il, on, 0); -} - -static int il_led_blink_set(struct led_classdev *led_cdev, - unsigned long *delay_on, - unsigned long *delay_off) -{ - struct il_priv *il = container_of(led_cdev, struct il_priv, led); - - return il_led_cmd(il, *delay_on, *delay_off); -} - -void il_leds_init(struct il_priv *il) -{ - int mode = led_mode; - int ret; - - if (mode == IL_LED_DEFAULT) - mode = il->cfg->led_mode; - - il->led.name = kasprintf(GFP_KERNEL, "%s-led", - wiphy_name(il->hw->wiphy)); - il->led.brightness_set = il_led_brightness_set; - il->led.blink_set = il_led_blink_set; - il->led.max_brightness = 1; - - switch (mode) { - case IL_LED_DEFAULT: - WARN_ON(1); - break; - case IL_LED_BLINK: - il->led.default_trigger = - ieee80211_create_tpt_led_trigger(il->hw, - IEEE80211_TPT_LEDTRIG_FL_CONNECTED, - il_blink, ARRAY_SIZE(il_blink)); - break; - case IL_LED_RF_STATE: - il->led.default_trigger = - ieee80211_get_radio_led_name(il->hw); - break; - } - - ret = led_classdev_register(&il->pci_dev->dev, &il->led); - if (ret) { - kfree(il->led.name); - return; - } - - il->led_registered = true; -} -EXPORT_SYMBOL(il_leds_init); - -void il_leds_exit(struct il_priv *il) -{ - if (!il->led_registered) - return; - - led_classdev_unregister(&il->led); - kfree(il->led.name); -} -EXPORT_SYMBOL(il_leds_exit); diff --git a/drivers/net/wireless/iwlegacy/iwl-power.c b/drivers/net/wireless/iwlegacy/iwl-power.c deleted file mode 100644 index 2b06a95..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-power.c +++ /dev/null @@ -1,165 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved. - * - * Portions of this file are derived from the ipw3945 project, as well - * as portions of the ieee80211 subsystem header files. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - *****************************************************************************/ - - -#include -#include -#include -#include - -#include - -#include "iwl-eeprom.h" -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-io.h" -#include "iwl-commands.h" -#include "iwl-debug.h" -#include "iwl-power.h" - -/* - * Setting power level allows the card to go to sleep when not busy. - * - * We calculate a sleep command based on the required latency, which - * we get from mac80211. In order to handle thermal throttling, we can - * also use pre-defined power levels. - */ - -/* - * This defines the old power levels. They are still used by default - * (level 1) and for thermal throttle (levels 3 through 5) - */ - -struct il_power_vec_entry { - struct il_powertable_cmd cmd; - u8 no_dtim; /* number of skip dtim */ -}; - -static void il_power_sleep_cam_cmd(struct il_priv *il, - struct il_powertable_cmd *cmd) -{ - memset(cmd, 0, sizeof(*cmd)); - - if (il->power_data.pci_pm) - cmd->flags |= IL_POWER_PCI_PM_MSK; - - D_POWER("Sleep command for CAM\n"); -} - -static int -il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd) -{ - D_POWER("Sending power/sleep command\n"); - D_POWER("Flags value = 0x%08X\n", cmd->flags); - D_POWER("Tx timeout = %u\n", - le32_to_cpu(cmd->tx_data_timeout)); - D_POWER("Rx timeout = %u\n", - le32_to_cpu(cmd->rx_data_timeout)); - D_POWER( - "Sleep interval vector = { %d , %d , %d , %d , %d }\n", - le32_to_cpu(cmd->sleep_interval[0]), - le32_to_cpu(cmd->sleep_interval[1]), - le32_to_cpu(cmd->sleep_interval[2]), - le32_to_cpu(cmd->sleep_interval[3]), - le32_to_cpu(cmd->sleep_interval[4])); - - return il_send_cmd_pdu(il, C_POWER_TBL, - sizeof(struct il_powertable_cmd), cmd); -} - -int -il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, - bool force) -{ - int ret; - bool update_chains; - - lockdep_assert_held(&il->mutex); - - /* Don't update the RX chain when chain noise calibration is running */ - update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE || - il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE; - - if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force) - return 0; - - if (!il_is_ready_rf(il)) - return -EIO; - - /* scan complete use sleep_power_next, need to be updated */ - memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd)); - if (test_bit(S_SCANNING, &il->status) && !force) { - D_INFO("Defer power set mode while scanning\n"); - return 0; - } - - if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK) - set_bit(S_POWER_PMI, &il->status); - - ret = il_set_power(il, cmd); - if (!ret) { - if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)) - clear_bit(S_POWER_PMI, &il->status); - - if (il->cfg->ops->lib->update_chain_flags && update_chains) - il->cfg->ops->lib->update_chain_flags(il); - else if (il->cfg->ops->lib->update_chain_flags) - D_POWER( - "Cannot update the power, chain noise " - "calibration running: %d\n", - il->chain_noise_data.state); - - memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)); - } else - IL_ERR("set power fail, ret = %d", ret); - - return ret; -} - -int il_power_update_mode(struct il_priv *il, bool force) -{ - struct il_powertable_cmd cmd; - - il_power_sleep_cam_cmd(il, &cmd); - return il_power_set_mode(il, &cmd, force); -} -EXPORT_SYMBOL(il_power_update_mode); - -/* initialize to default */ -void il_power_initialize(struct il_priv *il) -{ - u16 lctl = il_pcie_link_ctl(il); - - il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN); - - il->power_data.debug_sleep_level_override = -1; - - memset(&il->power_data.sleep_cmd, 0, - sizeof(il->power_data.sleep_cmd)); -} -EXPORT_SYMBOL(il_power_initialize); diff --git a/drivers/net/wireless/iwlegacy/iwl-rx.c b/drivers/net/wireless/iwlegacy/iwl-rx.c deleted file mode 100644 index 7a8ae55..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-rx.c +++ /dev/null @@ -1,281 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. - * - * Portions of this file are derived from the ipw3945 project, as well - * as portions of the ieee80211 subsystem header files. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ - -#include -#include -#include -#include -#include "iwl-eeprom.h" -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-sta.h" -#include "iwl-io.h" -#include "iwl-helpers.h" -/************************** RX-FUNCTIONS ****************************/ -/* - * Rx theory of operation - * - * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs), - * each of which point to Receive Buffers to be filled by the NIC. These get - * used not only for Rx frames, but for any command response or notification - * from the NIC. The driver and NIC manage the Rx buffers by means - * of idxes into the circular buffer. - * - * Rx Queue Indexes - * The host/firmware share two idx registers for managing the Rx buffers. - * - * The READ idx maps to the first position that the firmware may be writing - * to -- the driver can read up to (but not including) this position and get - * good data. - * The READ idx is managed by the firmware once the card is enabled. - * - * The WRITE idx maps to the last position the driver has read from -- the - * position preceding WRITE is the last slot the firmware can place a packet. - * - * The queue is empty (no good data) if WRITE = READ - 1, and is full if - * WRITE = READ. - * - * During initialization, the host sets up the READ queue position to the first - * IDX position, and WRITE to the last (READ - 1 wrapped) - * - * When the firmware places a packet in a buffer, it will advance the READ idx - * and fire the RX interrupt. The driver can then query the READ idx and - * process as many packets as possible, moving the WRITE idx forward as it - * resets the Rx queue buffers with new memory. - * - * The management in the driver is as follows: - * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When - * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled - * to replenish the iwl->rxq->rx_free. - * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the - * iwl->rxq is replenished and the READ IDX is updated (updating the - * 'processed' and 'read' driver idxes as well) - * + A received packet is processed and handed to the kernel network stack, - * detached from the iwl->rxq. The driver 'processed' idx is updated. - * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free - * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ - * IDX is not incremented and iwl->status(RX_STALLED) is set. If there - * were enough free buffers and RX_STALLED is set it is cleared. - * - * - * Driver sequence: - * - * il_rx_queue_alloc() Allocates rx_free - * il_rx_replenish() Replenishes rx_free list from rx_used, and calls - * il_rx_queue_restock - * il_rx_queue_restock() Moves available buffers from rx_free into Rx - * queue, updates firmware pointers, and updates - * the WRITE idx. If insufficient rx_free buffers - * are available, schedules il_rx_replenish - * - * -- enable interrupts -- - * ISR - il_rx() Detach il_rx_bufs from pool up to the - * READ IDX, detaching the SKB from the pool. - * Moves the packet buffer from queue to rx_used. - * Calls il_rx_queue_restock to refill any empty - * slots. - * ... - * - */ - -/** - * il_rx_queue_space - Return number of free slots available in queue. - */ -int il_rx_queue_space(const struct il_rx_queue *q) -{ - int s = q->read - q->write; - if (s <= 0) - s += RX_QUEUE_SIZE; - /* keep some buffer to not confuse full and empty queue */ - s -= 2; - if (s < 0) - s = 0; - return s; -} -EXPORT_SYMBOL(il_rx_queue_space); - -/** - * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue - */ -void -il_rx_queue_update_write_ptr(struct il_priv *il, - struct il_rx_queue *q) -{ - unsigned long flags; - u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg; - u32 reg; - - spin_lock_irqsave(&q->lock, flags); - - if (q->need_update == 0) - goto exit_unlock; - - /* If power-saving is in use, make sure device is awake */ - if (test_bit(S_POWER_PMI, &il->status)) { - reg = _il_rd(il, CSR_UCODE_DRV_GP1); - - if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { - D_INFO( - "Rx queue requesting wakeup," - " GP1 = 0x%x\n", reg); - il_set_bit(il, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - goto exit_unlock; - } - - q->write_actual = (q->write & ~0x7); - il_wr(il, rx_wrt_ptr_reg, - q->write_actual); - - /* Else device is assumed to be awake */ - } else { - /* Device expects a multiple of 8 */ - q->write_actual = (q->write & ~0x7); - il_wr(il, rx_wrt_ptr_reg, - q->write_actual); - } - - q->need_update = 0; - - exit_unlock: - spin_unlock_irqrestore(&q->lock, flags); -} -EXPORT_SYMBOL(il_rx_queue_update_write_ptr); - -int il_rx_queue_alloc(struct il_priv *il) -{ - struct il_rx_queue *rxq = &il->rxq; - struct device *dev = &il->pci_dev->dev; - int i; - - spin_lock_init(&rxq->lock); - INIT_LIST_HEAD(&rxq->rx_free); - INIT_LIST_HEAD(&rxq->rx_used); - - /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */ - rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma, - GFP_KERNEL); - if (!rxq->bd) - goto err_bd; - - rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status), - &rxq->rb_stts_dma, GFP_KERNEL); - if (!rxq->rb_stts) - goto err_rb; - - /* Fill the rx_used queue with _all_ of the Rx buffers */ - for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) - list_add_tail(&rxq->pool[i].list, &rxq->rx_used); - - /* Set us so that we have processed and used all buffers, but have - * not restocked the Rx queue with fresh buffers */ - rxq->read = rxq->write = 0; - rxq->write_actual = 0; - rxq->free_count = 0; - rxq->need_update = 0; - return 0; - -err_rb: - dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, - rxq->bd_dma); -err_bd: - return -ENOMEM; -} -EXPORT_SYMBOL(il_rx_queue_alloc); - - -void il_hdl_spectrum_measurement(struct il_priv *il, - struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_spectrum_notification *report = &(pkt->u.spectrum_notif); - - if (!report->state) { - D_11H( - "Spectrum Measure Notification: Start\n"); - return; - } - - memcpy(&il->measure_report, report, sizeof(*report)); - il->measurement_status |= MEASUREMENT_READY; -} -EXPORT_SYMBOL(il_hdl_spectrum_measurement); - -/* - * returns non-zero if packet should be dropped - */ -int il_set_decrypted_flag(struct il_priv *il, - struct ieee80211_hdr *hdr, - u32 decrypt_res, - struct ieee80211_rx_status *stats) -{ - u16 fc = le16_to_cpu(hdr->frame_control); - - /* - * All contexts have the same setting here due to it being - * a module parameter, so OK to check any context. - */ - if (il->ctx.active.filter_flags & - RXON_FILTER_DIS_DECRYPT_MSK) - return 0; - - if (!(fc & IEEE80211_FCTL_PROTECTED)) - return 0; - - D_RX("decrypt_res:0x%x\n", decrypt_res); - switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { - case RX_RES_STATUS_SEC_TYPE_TKIP: - /* The uCode has got a bad phase 1 Key, pushes the packet. - * Decryption will be done in SW. */ - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_BAD_KEY_TTAK) - break; - - case RX_RES_STATUS_SEC_TYPE_WEP: - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_BAD_ICV_MIC) { - /* bad ICV, the packet is destroyed since the - * decryption is inplace, drop it */ - D_RX("Packet destroyed\n"); - return -1; - } - case RX_RES_STATUS_SEC_TYPE_CCMP: - if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == - RX_RES_STATUS_DECRYPT_OK) { - D_RX("hw decrypt successfully!!!\n"); - stats->flag |= RX_FLAG_DECRYPTED; - } - break; - - default: - break; - } - return 0; -} -EXPORT_SYMBOL(il_set_decrypted_flag); diff --git a/drivers/net/wireless/iwlegacy/iwl-scan.c b/drivers/net/wireless/iwlegacy/iwl-scan.c deleted file mode 100644 index aaa589a..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-scan.c +++ /dev/null @@ -1,545 +0,0 @@ -/****************************************************************************** - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, - * USA - * - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * Contact Information: - * Intel Linux Wireless - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - *****************************************************************************/ -#include -#include -#include -#include - -#include "iwl-eeprom.h" -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-sta.h" -#include "iwl-io.h" -#include "iwl-helpers.h" - -/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after - * sending probe req. This should be set long enough to hear probe responses - * from more than one AP. */ -#define IL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */ -#define IL_ACTIVE_DWELL_TIME_52 (20) - -#define IL_ACTIVE_DWELL_FACTOR_24GHZ (3) -#define IL_ACTIVE_DWELL_FACTOR_52GHZ (2) - -/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel. - * Must be set longer than active dwell time. - * For the most reliable scan, set > AP beacon interval (typically 100msec). */ -#define IL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */ -#define IL_PASSIVE_DWELL_TIME_52 (10) -#define IL_PASSIVE_DWELL_BASE (100) -#define IL_CHANNEL_TUNE_TIME 5 - -static int il_send_scan_abort(struct il_priv *il) -{ - int ret; - struct il_rx_pkt *pkt; - struct il_host_cmd cmd = { - .id = C_SCAN_ABORT, - .flags = CMD_WANT_SKB, - }; - - /* Exit instantly with error when device is not ready - * to receive scan abort command or it does not perform - * hardware scan currently */ - if (!test_bit(S_READY, &il->status) || - !test_bit(S_GEO_CONFIGURED, &il->status) || - !test_bit(S_SCAN_HW, &il->status) || - test_bit(S_FW_ERROR, &il->status) || - test_bit(S_EXIT_PENDING, &il->status)) - return -EIO; - - ret = il_send_cmd_sync(il, &cmd); - if (ret) - return ret; - - pkt = (struct il_rx_pkt *)cmd.reply_page; - if (pkt->u.status != CAN_ABORT_STATUS) { - /* The scan abort will return 1 for success or - * 2 for "failure". A failure condition can be - * due to simply not being in an active scan which - * can occur if we send the scan abort before we - * the microcode has notified us that a scan is - * completed. */ - D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status); - ret = -EIO; - } - - il_free_pages(il, cmd.reply_page); - return ret; -} - -static void il_complete_scan(struct il_priv *il, bool aborted) -{ - /* check if scan was requested from mac80211 */ - if (il->scan_request) { - D_SCAN("Complete scan in mac80211\n"); - ieee80211_scan_completed(il->hw, aborted); - } - - il->scan_vif = NULL; - il->scan_request = NULL; -} - -void il_force_scan_end(struct il_priv *il) -{ - lockdep_assert_held(&il->mutex); - - if (!test_bit(S_SCANNING, &il->status)) { - D_SCAN("Forcing scan end while not scanning\n"); - return; - } - - D_SCAN("Forcing scan end\n"); - clear_bit(S_SCANNING, &il->status); - clear_bit(S_SCAN_HW, &il->status); - clear_bit(S_SCAN_ABORTING, &il->status); - il_complete_scan(il, true); -} - -static void il_do_scan_abort(struct il_priv *il) -{ - int ret; - - lockdep_assert_held(&il->mutex); - - if (!test_bit(S_SCANNING, &il->status)) { - D_SCAN("Not performing scan to abort\n"); - return; - } - - if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) { - D_SCAN("Scan abort in progress\n"); - return; - } - - ret = il_send_scan_abort(il); - if (ret) { - D_SCAN("Send scan abort failed %d\n", ret); - il_force_scan_end(il); - } else - D_SCAN("Successfully send scan abort\n"); -} - -/** - * il_scan_cancel - Cancel any currently executing HW scan - */ -int il_scan_cancel(struct il_priv *il) -{ - D_SCAN("Queuing abort scan\n"); - queue_work(il->workqueue, &il->abort_scan); - return 0; -} -EXPORT_SYMBOL(il_scan_cancel); - -/** - * il_scan_cancel_timeout - Cancel any currently executing HW scan - * @ms: amount of time to wait (in milliseconds) for scan to abort - * - */ -int il_scan_cancel_timeout(struct il_priv *il, unsigned long ms) -{ - unsigned long timeout = jiffies + msecs_to_jiffies(ms); - - lockdep_assert_held(&il->mutex); - - D_SCAN("Scan cancel timeout\n"); - - il_do_scan_abort(il); - - while (time_before_eq(jiffies, timeout)) { - if (!test_bit(S_SCAN_HW, &il->status)) - break; - msleep(20); - } - - return test_bit(S_SCAN_HW, &il->status); -} -EXPORT_SYMBOL(il_scan_cancel_timeout); - -/* Service response to C_SCAN (0x80) */ -static void il_hdl_scan(struct il_priv *il, - struct il_rx_buf *rxb) -{ -#ifdef CONFIG_IWLEGACY_DEBUG - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scanreq_notification *notif = - (struct il_scanreq_notification *)pkt->u.raw; - - D_SCAN("Scan request status = 0x%x\n", notif->status); -#endif -} - -/* Service N_SCAN_START (0x82) */ -static void il_hdl_scan_start(struct il_priv *il, - struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scanstart_notification *notif = - (struct il_scanstart_notification *)pkt->u.raw; - il->scan_start_tsf = le32_to_cpu(notif->tsf_low); - D_SCAN("Scan start: " - "%d [802.11%s] " - "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", - notif->channel, - notif->band ? "bg" : "a", - le32_to_cpu(notif->tsf_high), - le32_to_cpu(notif->tsf_low), - notif->status, notif->beacon_timer); -} - -/* Service N_SCAN_RESULTS (0x83) */ -static void il_hdl_scan_results(struct il_priv *il, - struct il_rx_buf *rxb) -{ -#ifdef CONFIG_IWLEGACY_DEBUG - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scanresults_notification *notif = - (struct il_scanresults_notification *)pkt->u.raw; - - D_SCAN("Scan ch.res: " - "%d [802.11%s] " - "(TSF: 0x%08X:%08X) - %d " - "elapsed=%lu usec\n", - notif->channel, - notif->band ? "bg" : "a", - le32_to_cpu(notif->tsf_high), - le32_to_cpu(notif->tsf_low), - le32_to_cpu(notif->stats[0]), - le32_to_cpu(notif->tsf_low) - il->scan_start_tsf); -#endif -} - -/* Service N_SCAN_COMPLETE (0x84) */ -static void il_hdl_scan_complete(struct il_priv *il, - struct il_rx_buf *rxb) -{ - -#ifdef CONFIG_IWLEGACY_DEBUG - struct il_rx_pkt *pkt = rxb_addr(rxb); - struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw; -#endif - - D_SCAN( - "Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n", - scan_notif->scanned_channels, - scan_notif->tsf_low, - scan_notif->tsf_high, scan_notif->status); - - /* The HW is no longer scanning */ - clear_bit(S_SCAN_HW, &il->status); - - D_SCAN("Scan on %sGHz took %dms\n", - (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2", - jiffies_to_msecs(jiffies - il->scan_start)); - - queue_work(il->workqueue, &il->scan_completed); -} - -void il_setup_rx_scan_handlers(struct il_priv *il) -{ - /* scan handlers */ - il->handlers[C_SCAN] = il_hdl_scan; - il->handlers[N_SCAN_START] = - il_hdl_scan_start; - il->handlers[N_SCAN_RESULTS] = - il_hdl_scan_results; - il->handlers[N_SCAN_COMPLETE] = - il_hdl_scan_complete; -} -EXPORT_SYMBOL(il_setup_rx_scan_handlers); - -inline u16 il_get_active_dwell_time(struct il_priv *il, - enum ieee80211_band band, - u8 n_probes) -{ - if (band == IEEE80211_BAND_5GHZ) - return IL_ACTIVE_DWELL_TIME_52 + - IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1); - else - return IL_ACTIVE_DWELL_TIME_24 + - IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1); -} -EXPORT_SYMBOL(il_get_active_dwell_time); - -u16 il_get_passive_dwell_time(struct il_priv *il, - enum ieee80211_band band, - struct ieee80211_vif *vif) -{ - struct il_rxon_context *ctx = &il->ctx; - u16 value; - - u16 passive = (band == IEEE80211_BAND_2GHZ) ? - IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_24 : - IL_PASSIVE_DWELL_BASE + IL_PASSIVE_DWELL_TIME_52; - - if (il_is_any_associated(il)) { - /* - * If we're associated, we clamp the maximum passive - * dwell time to be 98% of the smallest beacon interval - * (minus 2 * channel tune time) - */ - value = ctx->vif ? ctx->vif->bss_conf.beacon_int : 0; - if (value > IL_PASSIVE_DWELL_BASE || !value) - value = IL_PASSIVE_DWELL_BASE; - value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2; - passive = min(value, passive); - } - - return passive; -} -EXPORT_SYMBOL(il_get_passive_dwell_time); - -void il_init_scan_params(struct il_priv *il) -{ - u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1; - if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ]) - il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx; - if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ]) - il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx; -} -EXPORT_SYMBOL(il_init_scan_params); - -static int il_scan_initiate(struct il_priv *il, - struct ieee80211_vif *vif) -{ - int ret; - - lockdep_assert_held(&il->mutex); - - if (WARN_ON(!il->cfg->ops->utils->request_scan)) - return -EOPNOTSUPP; - - cancel_delayed_work(&il->scan_check); - - if (!il_is_ready_rf(il)) { - IL_WARN("Request scan called when driver not ready.\n"); - return -EIO; - } - - if (test_bit(S_SCAN_HW, &il->status)) { - D_SCAN( - "Multiple concurrent scan requests in parallel.\n"); - return -EBUSY; - } - - if (test_bit(S_SCAN_ABORTING, &il->status)) { - D_SCAN("Scan request while abort pending.\n"); - return -EBUSY; - } - - D_SCAN("Starting scan...\n"); - - set_bit(S_SCANNING, &il->status); - il->scan_start = jiffies; - - ret = il->cfg->ops->utils->request_scan(il, vif); - if (ret) { - clear_bit(S_SCANNING, &il->status); - return ret; - } - - queue_delayed_work(il->workqueue, &il->scan_check, - IL_SCAN_CHECK_WATCHDOG); - - return 0; -} - -int il_mac_hw_scan(struct ieee80211_hw *hw, - struct ieee80211_vif *vif, - struct cfg80211_scan_request *req) -{ - struct il_priv *il = hw->priv; - int ret; - - D_MAC80211("enter\n"); - - if (req->n_channels == 0) - return -EINVAL; - - mutex_lock(&il->mutex); - - if (test_bit(S_SCANNING, &il->status)) { - D_SCAN("Scan already in progress.\n"); - ret = -EAGAIN; - goto out_unlock; - } - - /* mac80211 will only ask for one band at a time */ - il->scan_request = req; - il->scan_vif = vif; - il->scan_band = req->channels[0]->band; - - ret = il_scan_initiate(il, vif); - - D_MAC80211("leave\n"); - -out_unlock: - mutex_unlock(&il->mutex); - - return ret; -} -EXPORT_SYMBOL(il_mac_hw_scan); - -static void il_bg_scan_check(struct work_struct *data) -{ - struct il_priv *il = - container_of(data, struct il_priv, scan_check.work); - - D_SCAN("Scan check work\n"); - - /* Since we are here firmware does not finish scan and - * most likely is in bad shape, so we don't bother to - * send abort command, just force scan complete to mac80211 */ - mutex_lock(&il->mutex); - il_force_scan_end(il); - mutex_unlock(&il->mutex); -} - -/** - * il_fill_probe_req - fill in all required fields and IE for probe request - */ - -u16 -il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame, - const u8 *ta, const u8 *ies, int ie_len, int left) -{ - int len = 0; - u8 *pos = NULL; - - /* Make sure there is enough space for the probe request, - * two mandatory IEs and the data */ - left -= 24; - if (left < 0) - return 0; - - frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); - memcpy(frame->da, il_bcast_addr, ETH_ALEN); - memcpy(frame->sa, ta, ETH_ALEN); - memcpy(frame->bssid, il_bcast_addr, ETH_ALEN); - frame->seq_ctrl = 0; - - len += 24; - - /* ...next IE... */ - pos = &frame->u.probe_req.variable[0]; - - /* fill in our indirect SSID IE */ - left -= 2; - if (left < 0) - return 0; - *pos++ = WLAN_EID_SSID; - *pos++ = 0; - - len += 2; - - if (WARN_ON(left < ie_len)) - return len; - - if (ies && ie_len) { - memcpy(pos, ies, ie_len); - len += ie_len; - } - - return (u16)len; -} -EXPORT_SYMBOL(il_fill_probe_req); - -static void il_bg_abort_scan(struct work_struct *work) -{ - struct il_priv *il = container_of(work, struct il_priv, abort_scan); - - D_SCAN("Abort scan work\n"); - - /* We keep scan_check work queued in case when firmware will not - * report back scan completed notification */ - mutex_lock(&il->mutex); - il_scan_cancel_timeout(il, 200); - mutex_unlock(&il->mutex); -} - -static void il_bg_scan_completed(struct work_struct *work) -{ - struct il_priv *il = - container_of(work, struct il_priv, scan_completed); - bool aborted; - - D_SCAN("Completed scan.\n"); - - cancel_delayed_work(&il->scan_check); - - mutex_lock(&il->mutex); - - aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status); - if (aborted) - D_SCAN("Aborted scan completed.\n"); - - if (!test_and_clear_bit(S_SCANNING, &il->status)) { - D_SCAN("Scan already completed.\n"); - goto out_settings; - } - - il_complete_scan(il, aborted); - -out_settings: - /* Can we still talk to firmware ? */ - if (!il_is_ready_rf(il)) - goto out; - - /* - * We do not commit power settings while scan is pending, - * do it now if the settings changed. - */ - il_power_set_mode(il, &il->power_data.sleep_cmd_next, false); - il_set_tx_power(il, il->tx_power_next, false); - - il->cfg->ops->utils->post_scan(il); - -out: - mutex_unlock(&il->mutex); -} - -void il_setup_scan_deferred_work(struct il_priv *il) -{ - INIT_WORK(&il->scan_completed, il_bg_scan_completed); - INIT_WORK(&il->abort_scan, il_bg_abort_scan); - INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check); -} -EXPORT_SYMBOL(il_setup_scan_deferred_work); - -void il_cancel_scan_deferred_work(struct il_priv *il) -{ - cancel_work_sync(&il->abort_scan); - cancel_work_sync(&il->scan_completed); - - if (cancel_delayed_work_sync(&il->scan_check)) { - mutex_lock(&il->mutex); - il_force_scan_end(il); - mutex_unlock(&il->mutex); - } -} -EXPORT_SYMBOL(il_cancel_scan_deferred_work); diff --git a/drivers/net/wireless/iwlegacy/iwl-tx.c b/drivers/net/wireless/iwlegacy/iwl-tx.c deleted file mode 100644 index 3b588b3..0000000 --- a/drivers/net/wireless/iwlegacy/iwl-tx.c +++ /dev/null @@ -1,655 +0,0 @@ -/****************************************************************************** - * - * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. - * - * Portions of this file are derived from the ipw3945 project, as well - * as portions of the ieee80211 subsystem header files. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * The full GNU General Public License is included in this distribution in the - * file called LICENSE. - * - * Contact Information: - * Intel Linux Wireless - * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 - * - *****************************************************************************/ - -#include -#include -#include -#include -#include "iwl-eeprom.h" -#include "iwl-dev.h" -#include "iwl-core.h" -#include "iwl-sta.h" -#include "iwl-io.h" -#include "iwl-helpers.h" - -/** - * il_txq_update_write_ptr - Send new write idx to hardware - */ -void -il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq) -{ - u32 reg = 0; - int txq_id = txq->q.id; - - if (txq->need_update == 0) - return; - - /* if we're trying to save power */ - if (test_bit(S_POWER_PMI, &il->status)) { - /* wake up nic if it's powered down ... - * uCode will wake up, and interrupt us again, so next - * time we'll skip this part. */ - reg = _il_rd(il, CSR_UCODE_DRV_GP1); - - if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { - D_INFO( - "Tx queue %d requesting wakeup," - " GP1 = 0x%x\n", txq_id, reg); - il_set_bit(il, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - return; - } - - il_wr(il, HBUS_TARG_WRPTR, - txq->q.write_ptr | (txq_id << 8)); - - /* - * else not in power-save mode, - * uCode will never sleep when we're - * trying to tx (during RFKILL, we're not trying to tx). - */ - } else - _il_wr(il, HBUS_TARG_WRPTR, - txq->q.write_ptr | (txq_id << 8)); - txq->need_update = 0; -} -EXPORT_SYMBOL(il_txq_update_write_ptr); - -/** - * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's - */ -void il_tx_queue_unmap(struct il_priv *il, int txq_id) -{ - struct il_tx_queue *txq = &il->txq[txq_id]; - struct il_queue *q = &txq->q; - - if (q->n_bd == 0) - return; - - while (q->write_ptr != q->read_ptr) { - il->cfg->ops->lib->txq_free_tfd(il, txq); - q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd); - } -} -EXPORT_SYMBOL(il_tx_queue_unmap); - -/** - * il_tx_queue_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -void il_tx_queue_free(struct il_priv *il, int txq_id) -{ - struct il_tx_queue *txq = &il->txq[txq_id]; - struct device *dev = &il->pci_dev->dev; - int i; - - il_tx_queue_unmap(il, txq_id); - - /* De-alloc array of command/tx buffers */ - for (i = 0; i < TFD_TX_CMD_SLOTS; i++) - kfree(txq->cmd[i]); - - /* De-alloc circular buffer of TFDs */ - if (txq->q.n_bd) - dma_free_coherent(dev, il->hw_params.tfd_size * - txq->q.n_bd, txq->tfds, txq->q.dma_addr); - - /* De-alloc array of per-TFD driver data */ - kfree(txq->txb); - txq->txb = NULL; - - /* deallocate arrays */ - kfree(txq->cmd); - kfree(txq->meta); - txq->cmd = NULL; - txq->meta = NULL; - - /* 0-fill queue descriptor structure */ - memset(txq, 0, sizeof(*txq)); -} -EXPORT_SYMBOL(il_tx_queue_free); - -/** - * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue - */ -void il_cmd_queue_unmap(struct il_priv *il) -{ - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - struct il_queue *q = &txq->q; - int i; - - if (q->n_bd == 0) - return; - - while (q->read_ptr != q->write_ptr) { - i = il_get_cmd_idx(q, q->read_ptr, 0); - - if (txq->meta[i].flags & CMD_MAPPED) { - pci_unmap_single(il->pci_dev, - dma_unmap_addr(&txq->meta[i], mapping), - dma_unmap_len(&txq->meta[i], len), - PCI_DMA_BIDIRECTIONAL); - txq->meta[i].flags = 0; - } - - q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd); - } - - i = q->n_win; - if (txq->meta[i].flags & CMD_MAPPED) { - pci_unmap_single(il->pci_dev, - dma_unmap_addr(&txq->meta[i], mapping), - dma_unmap_len(&txq->meta[i], len), - PCI_DMA_BIDIRECTIONAL); - txq->meta[i].flags = 0; - } -} -EXPORT_SYMBOL(il_cmd_queue_unmap); - -/** - * il_cmd_queue_free - Deallocate DMA queue. - * @txq: Transmit queue to deallocate. - * - * Empty queue by removing and destroying all BD's. - * Free all buffers. - * 0-fill, but do not free "txq" descriptor structure. - */ -void il_cmd_queue_free(struct il_priv *il) -{ - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - struct device *dev = &il->pci_dev->dev; - int i; - - il_cmd_queue_unmap(il); - - /* De-alloc array of command/tx buffers */ - for (i = 0; i <= TFD_CMD_SLOTS; i++) - kfree(txq->cmd[i]); - - /* De-alloc circular buffer of TFDs */ - if (txq->q.n_bd) - dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd, - txq->tfds, txq->q.dma_addr); - - /* deallocate arrays */ - kfree(txq->cmd); - kfree(txq->meta); - txq->cmd = NULL; - txq->meta = NULL; - - /* 0-fill queue descriptor structure */ - memset(txq, 0, sizeof(*txq)); -} -EXPORT_SYMBOL(il_cmd_queue_free); - -/*************** DMA-QUEUE-GENERAL-FUNCTIONS ***** - * DMA services - * - * Theory of operation - * - * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer - * of buffer descriptors, each of which points to one or more data buffers for - * the device to read from or fill. Driver and device exchange status of each - * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty - * entries in each circular buffer, to protect against confusing empty and full - * queue states. - * - * The device reads or writes the data in the queues via the device's several - * DMA/FIFO channels. Each queue is mapped to a single DMA channel. - * - * For Tx queue, there are low mark and high mark limits. If, after queuing - * the packet for Tx, free space become < low mark, Tx queue stopped. When - * reclaiming packets (on 'tx done IRQ), if free space become > high mark, - * Tx queue resumed. - * - * See more detailed info in 4965.h. - ***************************************************/ - -int il_queue_space(const struct il_queue *q) -{ - int s = q->read_ptr - q->write_ptr; - - if (q->read_ptr > q->write_ptr) - s -= q->n_bd; - - if (s <= 0) - s += q->n_win; - /* keep some reserve to not confuse empty and full situations */ - s -= 2; - if (s < 0) - s = 0; - return s; -} -EXPORT_SYMBOL(il_queue_space); - - -/** - * il_queue_init - Initialize queue's high/low-water and read/write idxes - */ -static int il_queue_init(struct il_priv *il, struct il_queue *q, - int count, int slots_num, u32 id) -{ - q->n_bd = count; - q->n_win = slots_num; - q->id = id; - - /* count must be power-of-two size, otherwise il_queue_inc_wrap - * and il_queue_dec_wrap are broken. */ - BUG_ON(!is_power_of_2(count)); - - /* slots_num must be power-of-two size, otherwise - * il_get_cmd_idx is broken. */ - BUG_ON(!is_power_of_2(slots_num)); - - q->low_mark = q->n_win / 4; - if (q->low_mark < 4) - q->low_mark = 4; - - q->high_mark = q->n_win / 8; - if (q->high_mark < 2) - q->high_mark = 2; - - q->write_ptr = q->read_ptr = 0; - - return 0; -} - -/** - * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue - */ -static int il_tx_queue_alloc(struct il_priv *il, - struct il_tx_queue *txq, u32 id) -{ - struct device *dev = &il->pci_dev->dev; - size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX; - - /* Driver ilate data, only for Tx (not command) queues, - * not shared with device. */ - if (id != il->cmd_queue) { - txq->txb = kzalloc(sizeof(txq->txb[0]) * - TFD_QUEUE_SIZE_MAX, GFP_KERNEL); - if (!txq->txb) { - IL_ERR("kmalloc for auxiliary BD " - "structures failed\n"); - goto error; - } - } else { - txq->txb = NULL; - } - - /* Circular buffer of transmit frame descriptors (TFDs), - * shared with device */ - txq->tfds = dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, - GFP_KERNEL); - if (!txq->tfds) { - IL_ERR("pci_alloc_consistent(%zd) failed\n", tfd_sz); - goto error; - } - txq->q.id = id; - - return 0; - - error: - kfree(txq->txb); - txq->txb = NULL; - - return -ENOMEM; -} - -/** - * il_tx_queue_init - Allocate and initialize one tx/cmd queue - */ -int il_tx_queue_init(struct il_priv *il, struct il_tx_queue *txq, - int slots_num, u32 txq_id) -{ - int i, len; - int ret; - int actual_slots = slots_num; - - /* - * Alloc buffer array for commands (Tx or other types of commands). - * For the command queue (#4/#9), allocate command space + one big - * command for scan, since scan command is very huge; the system will - * not have two scans at the same time, so only one is needed. - * For normal Tx queues (all other queues), no super-size command - * space is needed. - */ - if (txq_id == il->cmd_queue) - actual_slots++; - - txq->meta = kzalloc(sizeof(struct il_cmd_meta) * actual_slots, - GFP_KERNEL); - txq->cmd = kzalloc(sizeof(struct il_device_cmd *) * actual_slots, - GFP_KERNEL); - - if (!txq->meta || !txq->cmd) - goto out_free_arrays; - - len = sizeof(struct il_device_cmd); - for (i = 0; i < actual_slots; i++) { - /* only happens for cmd queue */ - if (i == slots_num) - len = IL_MAX_CMD_SIZE; - - txq->cmd[i] = kmalloc(len, GFP_KERNEL); - if (!txq->cmd[i]) - goto err; - } - - /* Alloc driver data array and TFD circular buffer */ - ret = il_tx_queue_alloc(il, txq, txq_id); - if (ret) - goto err; - - txq->need_update = 0; - - /* - * For the default queues 0-3, set up the swq_id - * already -- all others need to get one later - * (if they need one at all). - */ - if (txq_id < 4) - il_set_swq_id(txq, txq_id, txq_id); - - /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise - * il_queue_inc_wrap and il_queue_dec_wrap are broken. */ - BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1)); - - /* Initialize queue's high/low-water marks, and head/tail idxes */ - il_queue_init(il, &txq->q, - TFD_QUEUE_SIZE_MAX, slots_num, txq_id); - - /* Tell device where to find queue */ - il->cfg->ops->lib->txq_init(il, txq); - - return 0; -err: - for (i = 0; i < actual_slots; i++) - kfree(txq->cmd[i]); -out_free_arrays: - kfree(txq->meta); - kfree(txq->cmd); - - return -ENOMEM; -} -EXPORT_SYMBOL(il_tx_queue_init); - -void il_tx_queue_reset(struct il_priv *il, struct il_tx_queue *txq, - int slots_num, u32 txq_id) -{ - int actual_slots = slots_num; - - if (txq_id == il->cmd_queue) - actual_slots++; - - memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots); - - txq->need_update = 0; - - /* Initialize queue's high/low-water marks, and head/tail idxes */ - il_queue_init(il, &txq->q, - TFD_QUEUE_SIZE_MAX, slots_num, txq_id); - - /* Tell device where to find queue */ - il->cfg->ops->lib->txq_init(il, txq); -} -EXPORT_SYMBOL(il_tx_queue_reset); - -/*************** HOST COMMAND QUEUE FUNCTIONS *****/ - -/** - * il_enqueue_hcmd - enqueue a uCode command - * @il: device ilate data point - * @cmd: a point to the ucode command structure - * - * The function returns < 0 values to indicate the operation is - * failed. On success, it turns the idx (> 0) of command in the - * command queue. - */ -int il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd) -{ - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - struct il_queue *q = &txq->q; - struct il_device_cmd *out_cmd; - struct il_cmd_meta *out_meta; - dma_addr_t phys_addr; - unsigned long flags; - int len; - u32 idx; - u16 fix_size; - - cmd->len = il->cfg->ops->utils->get_hcmd_size(cmd->id, cmd->len); - fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr)); - - /* If any of the command structures end up being larger than - * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then - * we will need to increase the size of the TFD entries - * Also, check to see if command buffer should not exceed the size - * of device_cmd and max_cmd_size. */ - BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) && - !(cmd->flags & CMD_SIZE_HUGE)); - BUG_ON(fix_size > IL_MAX_CMD_SIZE); - - if (il_is_rfkill(il) || il_is_ctkill(il)) { - IL_WARN("Not sending command - %s KILL\n", - il_is_rfkill(il) ? "RF" : "CT"); - return -EIO; - } - - spin_lock_irqsave(&il->hcmd_lock, flags); - - if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) { - spin_unlock_irqrestore(&il->hcmd_lock, flags); - - IL_ERR("Restarting adapter due to command queue full\n"); - queue_work(il->workqueue, &il->restart); - return -ENOSPC; - } - - idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE); - out_cmd = txq->cmd[idx]; - out_meta = &txq->meta[idx]; - - if (WARN_ON(out_meta->flags & CMD_MAPPED)) { - spin_unlock_irqrestore(&il->hcmd_lock, flags); - return -ENOSPC; - } - - memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */ - out_meta->flags = cmd->flags | CMD_MAPPED; - if (cmd->flags & CMD_WANT_SKB) - out_meta->source = cmd; - if (cmd->flags & CMD_ASYNC) - out_meta->callback = cmd->callback; - - out_cmd->hdr.cmd = cmd->id; - memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len); - - /* At this point, the out_cmd now has all of the incoming cmd - * information */ - - out_cmd->hdr.flags = 0; - out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | - IDX_TO_SEQ(q->write_ptr)); - if (cmd->flags & CMD_SIZE_HUGE) - out_cmd->hdr.sequence |= SEQ_HUGE_FRAME; - len = sizeof(struct il_device_cmd); - if (idx == TFD_CMD_SLOTS) - len = IL_MAX_CMD_SIZE; - -#ifdef CONFIG_IWLEGACY_DEBUG - switch (out_cmd->hdr.cmd) { - case C_TX_LINK_QUALITY_CMD: - case C_SENSITIVITY: - D_HC_DUMP( - "Sending command %s (#%x), seq: 0x%04X, " - "%d bytes at %d[%d]:%d\n", - il_get_cmd_string(out_cmd->hdr.cmd), - out_cmd->hdr.cmd, - le16_to_cpu(out_cmd->hdr.sequence), fix_size, - q->write_ptr, idx, il->cmd_queue); - break; - default: - D_HC("Sending command %s (#%x), seq: 0x%04X, " - "%d bytes at %d[%d]:%d\n", - il_get_cmd_string(out_cmd->hdr.cmd), - out_cmd->hdr.cmd, - le16_to_cpu(out_cmd->hdr.sequence), fix_size, - q->write_ptr, idx, il->cmd_queue); - } -#endif - txq->need_update = 1; - - if (il->cfg->ops->lib->txq_update_byte_cnt_tbl) - /* Set up entry in queue's byte count circular buffer */ - il->cfg->ops->lib->txq_update_byte_cnt_tbl(il, txq, 0); - - phys_addr = pci_map_single(il->pci_dev, &out_cmd->hdr, - fix_size, PCI_DMA_BIDIRECTIONAL); - dma_unmap_addr_set(out_meta, mapping, phys_addr); - dma_unmap_len_set(out_meta, len, fix_size); - - il->cfg->ops->lib->txq_attach_buf_to_tfd(il, txq, - phys_addr, fix_size, 1, - U32_PAD(cmd->len)); - - /* Increment and update queue's write idx */ - q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd); - il_txq_update_write_ptr(il, txq); - - spin_unlock_irqrestore(&il->hcmd_lock, flags); - return idx; -} - -/** - * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd - * - * When FW advances 'R' idx, all entries between old and new 'R' idx - * need to be reclaimed. As result, some free space forms. If there is - * enough free space (> low mark), wake the stack that feeds us. - */ -static void il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, - int idx, int cmd_idx) -{ - struct il_tx_queue *txq = &il->txq[txq_id]; - struct il_queue *q = &txq->q; - int nfreed = 0; - - if (idx >= q->n_bd || il_queue_used(q, idx) == 0) { - IL_ERR("Read idx for DMA queue txq id (%d), idx %d, " - "is out of range [0-%d] %d %d.\n", txq_id, - idx, q->n_bd, q->write_ptr, q->read_ptr); - return; - } - - for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx; - q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) { - - if (nfreed++ > 0) { - IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx, - q->write_ptr, q->read_ptr); - queue_work(il->workqueue, &il->restart); - } - - } -} - -/** - * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them - * @rxb: Rx buffer to reclaim - * - * If an Rx buffer has an async callback associated with it the callback - * will be executed. The attached skb (if present) will only be freed - * if the callback returns 1 - */ -void -il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb) -{ - struct il_rx_pkt *pkt = rxb_addr(rxb); - u16 sequence = le16_to_cpu(pkt->hdr.sequence); - int txq_id = SEQ_TO_QUEUE(sequence); - int idx = SEQ_TO_IDX(sequence); - int cmd_idx; - bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME); - struct il_device_cmd *cmd; - struct il_cmd_meta *meta; - struct il_tx_queue *txq = &il->txq[il->cmd_queue]; - unsigned long flags; - - /* If a Tx command is being handled and it isn't in the actual - * command queue then there a command routing bug has been introduced - * in the queue management code. */ - if (WARN(txq_id != il->cmd_queue, - "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n", - txq_id, il->cmd_queue, sequence, - il->txq[il->cmd_queue].q.read_ptr, - il->txq[il->cmd_queue].q.write_ptr)) { - il_print_hex_error(il, pkt, 32); - return; - } - - cmd_idx = il_get_cmd_idx(&txq->q, idx, huge); - cmd = txq->cmd[cmd_idx]; - meta = &txq->meta[cmd_idx]; - - txq->time_stamp = jiffies; - - pci_unmap_single(il->pci_dev, - dma_unmap_addr(meta, mapping), - dma_unmap_len(meta, len), - PCI_DMA_BIDIRECTIONAL); - - /* Input error checking is done when commands are added to queue. */ - if (meta->flags & CMD_WANT_SKB) { - meta->source->reply_page = (unsigned long)rxb_addr(rxb); - rxb->page = NULL; - } else if (meta->callback) - meta->callback(il, cmd, pkt); - - spin_lock_irqsave(&il->hcmd_lock, flags); - - il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx); - - if (!(meta->flags & CMD_ASYNC)) { - clear_bit(S_HCMD_ACTIVE, &il->status); - D_INFO("Clearing HCMD_ACTIVE for command %s\n", - il_get_cmd_string(cmd->hdr.cmd)); - wake_up(&il->wait_command_queue); - } - - /* Mark as unmapped */ - meta->flags = 0; - - spin_unlock_irqrestore(&il->hcmd_lock, flags); -} -EXPORT_SYMBOL(il_tx_cmd_complete); -- 1.7.1