Return-path: Received: from mail-pf0-f180.google.com ([209.85.192.180]:35268 "EHLO mail-pf0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755416AbdDMUKh (ORCPT ); Thu, 13 Apr 2017 16:10:37 -0400 Received: by mail-pf0-f180.google.com with SMTP id i5so32949842pfc.2 for ; Thu, 13 Apr 2017 13:10:37 -0700 (PDT) Date: Thu, 13 Apr 2017 13:10:33 -0700 From: Brian Norris To: Xinming Hu Cc: Linux Wireless , Kalle Valo , Dmitry Torokhov , rajatja@google.com, Cathy Luo , Xinming Hu , Ganapathi Bhat Subject: [PATCH v5 4/4] mwifiex: pcie: extract wifi part from combo firmware during function level reset Message-ID: <20170413201032.GA91869@google.com> (sfid-20170413_221042_555509_5FAFE408) References: <1492066102-31251-1-git-send-email-huxinming820@gmail.com> <1492066102-31251-4-git-send-email-huxinming820@gmail.com> <20170413184629.GB66124@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20170413184629.GB66124@google.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Xinming Hu A separate wifi-only firmware was download during pcie function level reset. It is in fact the tail part of wifi/bt combo firmware. Per Brian's and Dmitry's suggestion, this patch extract the wifi part from combo firmware. After that, the mrvl/pcie8997_wlan_v4.bin image in linux-firmware repo is redundant (though I guess we keep it around to support older kernels). Signed-off-by: Xinming Hu Signed-off-by: Ganapathi Bhat Signed-off-by: Cathy Luo Signed-off-by: Brian Norris --- On Thu, Apr 13, 2017 at 11:46:30AM -0700, Brian Norris wrote: > I might just rewrite this and send it myself, if I get the time. Done. v2: extract wifi part from combo firmware(Dmitry and Brian) add more description(Kalle) v3: same as v2 v4: add sequence comments, code enhance(Brian) v5: (Brian) fix overflow errors (Brian) add missing newline chars (Brian) consolidate header-skipping logic Note: I only resubmitted the 4th patch, as the others look fine --- drivers/net/wireless/marvell/mwifiex/fw.h | 18 +++++ drivers/net/wireless/marvell/mwifiex/pcie.c | 114 ++++++++++++++++++++++++++-- drivers/net/wireless/marvell/mwifiex/pcie.h | 3 +- 3 files changed, 127 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/marvell/mwifiex/fw.h b/drivers/net/wireless/marvell/mwifiex/fw.h index 0b683742e30c..6cf9ab9133ea 100644 --- a/drivers/net/wireless/marvell/mwifiex/fw.h +++ b/drivers/net/wireless/marvell/mwifiex/fw.h @@ -43,6 +43,24 @@ struct tx_packet_hdr { struct rfc_1042_hdr rfc1042_hdr; } __packed; +struct mwifiex_fw_header { + __le32 dnld_cmd; + __le32 base_addr; + __le32 data_length; + __le32 crc; +} __packed; + +struct mwifiex_fw_data { + struct mwifiex_fw_header header; + __le32 seq_num; + u8 data[1]; +} __packed; + +#define MWIFIEX_FW_DNLD_CMD_1 0x1 +#define MWIFIEX_FW_DNLD_CMD_5 0x5 +#define MWIFIEX_FW_DNLD_CMD_6 0x6 +#define MWIFIEX_FW_DNLD_CMD_7 0x7 + #define B_SUPPORTED_RATES 5 #define G_SUPPORTED_RATES 9 #define BG_SUPPORTED_RATES 13 diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c index 061223149bed..63102efb388e 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.c +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c @@ -1956,6 +1956,94 @@ static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter, return ret; } +/* Combo firmware image is a combination of + * (1) combo crc heaer, start with CMD5 + * (2) bluetooth image, start with CMD7, end with CMD6, data wrapped in CMD1. + * (3) wifi image. + * + * This function bypass the header and bluetooth part, return + * the offset of tail wifi-only part. + */ + +static int mwifiex_extract_wifi_fw(struct mwifiex_adapter *adapter, + const void *firmware, u32 firmware_len) { + const struct mwifiex_fw_data *fwdata; + u32 offset = 0, data_len, dnld_cmd; + int ret = 0; + bool cmd7_before = false; + + while (1) { + /* Check for integer and buffer overflow */ + if (offset + sizeof(fwdata->header) < sizeof(fwdata->header) || + offset + sizeof(fwdata->header) >= firmware_len) { + mwifiex_dbg(adapter, ERROR, + "extract wifi-only fw failure!\n"); + ret = -1; + goto done; + } + + fwdata = firmware + offset; + dnld_cmd = le32_to_cpu(fwdata->header.dnld_cmd); + data_len = le32_to_cpu(fwdata->header.data_length); + + /* Skip past header */ + offset += sizeof(fwdata->header); + + switch (dnld_cmd) { + case MWIFIEX_FW_DNLD_CMD_1: + if (!cmd7_before) { + mwifiex_dbg(adapter, ERROR, + "no cmd7 before cmd1!\n"); + ret = -1; + goto done; + } + if (offset + data_len < data_len) { + mwifiex_dbg(adapter, ERROR, "bad FW parse\n"); + ret = -1; + goto done; + } + offset += data_len; + break; + case MWIFIEX_FW_DNLD_CMD_5: + /* Check for integer overflow */ + if (offset + data_len < data_len) { + mwifiex_dbg(adapter, ERROR, "bad FW parse\n"); + ret = -1; + goto done; + } + offset += data_len; + break; + case MWIFIEX_FW_DNLD_CMD_6: + /* Check for integer overflow */ + if (offset + data_len < data_len) { + mwifiex_dbg(adapter, ERROR, "bad FW parse\n"); + ret = -1; + goto done; + } + offset += data_len; + if (offset >= firmware_len) { + mwifiex_dbg(adapter, ERROR, + "extract wifi-only fw failure!\n"); + ret = -1; + } else { + ret = offset; + } + goto done; + case MWIFIEX_FW_DNLD_CMD_7: + cmd7_before = true; + break; + default: + mwifiex_dbg(adapter, ERROR, "unknown dnld_cmd %d\n", + dnld_cmd); + ret = -1; + goto done; + } + } + +done: + return ret; +} + /* * This function downloads the firmware to the card. * @@ -1971,7 +2059,7 @@ static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter, u32 firmware_len = fw->fw_len; u32 offset = 0; struct sk_buff *skb; - u32 txlen, tx_blocks = 0, tries, len; + u32 txlen, tx_blocks = 0, tries, len, val; u32 block_retry_cnt = 0; struct pcie_service_card *card = adapter->card; const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; @@ -1998,6 +2086,24 @@ static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter, goto done; } + ret = mwifiex_read_reg(adapter, PCIE_SCRATCH_13_REG, &val); + if (ret) { + mwifiex_dbg(adapter, FATAL, "Failed to read scratch register 13\n"); + goto done; + } + + /* PCIE FLR case: extract wifi part from combo firmware*/ + if (val == MWIFIEX_PCIE_FLR_HAPPENS) { + ret = mwifiex_extract_wifi_fw(adapter, firmware, firmware_len); + if (ret < 0) { + mwifiex_dbg(adapter, ERROR, "Failed to extract wifi fw\n"); + goto done; + } + offset = ret; + mwifiex_dbg(adapter, MSG, + "info: dnld wifi firmware from %d bytes\n", offset); + } + /* Perform firmware data transfer */ do { u32 ireg_intr = 0; @@ -3070,12 +3176,6 @@ static void mwifiex_pcie_up_dev(struct mwifiex_adapter *adapter) struct pci_dev *pdev = card->dev; const struct mwifiex_pcie_card_reg *reg = card->pcie.reg; - /* Bluetooth is not on pcie interface. Download Wifi only firmware - * during pcie FLR, so that bluetooth part of firmware which is - * already running doesn't get affected. - */ - strcpy(adapter->fw_name, PCIE8997_DEFAULT_WIFIFW_NAME); - /* tx_buf_size might be changed to 3584 by firmware during * data transfer, we should reset it to default size. */ diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.h b/drivers/net/wireless/marvell/mwifiex/pcie.h index 7e2450ce79d3..f7ce9b6db6b4 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.h +++ b/drivers/net/wireless/marvell/mwifiex/pcie.h @@ -35,7 +35,6 @@ #define PCIE8897_B0_FW_NAME "mrvl/pcie8897_uapsta.bin" #define PCIEUART8997_FW_NAME_V4 "mrvl/pcieuart8997_combo_v4.bin" #define PCIEUSB8997_FW_NAME_V4 "mrvl/pcieusb8997_combo_v4.bin" -#define PCIE8997_DEFAULT_WIFIFW_NAME "mrvl/pcie8997_wlan_v4.bin" #define PCIE_VENDOR_ID_MARVELL (0x11ab) #define PCIE_VENDOR_ID_V2_MARVELL (0x1b4b) @@ -120,6 +119,8 @@ #define MWIFIEX_SLEEP_COOKIE_SIZE 4 #define MWIFIEX_MAX_DELAY_COUNT 100 +#define MWIFIEX_PCIE_FLR_HAPPENS 0xFEDCBABA + struct mwifiex_pcie_card_reg { u16 cmd_addr_lo; u16 cmd_addr_hi; -- 2.12.2.762