Return-path: Received: from mail-wi0-f181.google.com ([209.85.212.181]:58742 "EHLO mail-wi0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752442Ab3KXUG4 (ORCPT ); Sun, 24 Nov 2013 15:06:56 -0500 Received: by mail-wi0-f181.google.com with SMTP id hq4so3146531wib.2 for ; Sun, 24 Nov 2013 12:06:55 -0800 (PST) From: Emmanuel Grumbach To: linux-wireless@vger.kernel.org Cc: Eyal Shapira , Emmanuel Grumbach Subject: [PATCH 04/29] iwlwifi: mvm: fix and improve printing of rate scale table Date: Sun, 24 Nov 2013 22:06:21 +0200 Message-Id: <1385323606-3603-4-git-send-email-egrumbach@gmail.com> (sfid-20131124_210707_017609_5791AC50) In-Reply-To: <52925BE7.4050406@gmail.com> References: <52925BE7.4050406@gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Eyal Shapira Info about VHT/HT rates wasn't printed properly when dumping the rate scale table. Fix that and print more info. While at it fix some other minor issues in the printing and prevent overflowing the print buffer. Signed-off-by: Eyal Shapira Reviewed-by: Johannes Berg Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/mvm/rs.c | 91 ++++++++++++++++++++++++++------- 1 file changed, 73 insertions(+), 18 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/mvm/rs.c b/drivers/net/wireless/iwlwifi/mvm/rs.c index a0b4cc8..f7ac485 100644 --- a/drivers/net/wireless/iwlwifi/mvm/rs.c +++ b/drivers/net/wireless/iwlwifi/mvm/rs.c @@ -2566,13 +2566,75 @@ static ssize_t rs_sta_dbgfs_scale_table_write(struct file *file, return count; } +static int rs_pretty_print_rate(char *buf, const u32 rate) +{ + static const char * const ant_name[] = { + [ANT_NONE] = "None", + [ANT_A] = "A", + [ANT_B] = "B", + [ANT_AB] = "AB", + [ANT_C] = "C", + [ANT_AC] = "AC", + [ANT_BC] = "BC", + [ANT_ABC] = "ABC", + }; + + char *type, *bw; + u8 mcs = 0, nss = 0; + u8 ant = (rate & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS; + + if (!(rate & RATE_MCS_HT_MSK) && + !(rate & RATE_MCS_VHT_MSK)) { + int index = iwl_hwrate_to_plcp_idx(rate); + + return sprintf(buf, "Legacy | ANT: %s Rate: %s Mbps\n", + ant_name[ant], iwl_rate_mcs[index].mbps); + } + + if (rate & RATE_MCS_VHT_MSK) { + type = "VHT"; + mcs = rate & RATE_VHT_MCS_RATE_CODE_MSK; + nss = ((rate & RATE_VHT_MCS_NSS_MSK) + >> RATE_VHT_MCS_NSS_POS) + 1; + } else if (rate & RATE_MCS_HT_MSK) { + type = "HT"; + mcs = rate & RATE_HT_MCS_INDEX_MSK; + } else { + type = "Unknown"; /* shouldn't happen */ + } + + switch (rate & RATE_MCS_CHAN_WIDTH_MSK) { + case RATE_MCS_CHAN_WIDTH_20: + bw = "20Mhz"; + break; + case RATE_MCS_CHAN_WIDTH_40: + bw = "40Mhz"; + break; + case RATE_MCS_CHAN_WIDTH_80: + bw = "80Mhz"; + break; + case RATE_MCS_CHAN_WIDTH_160: + bw = "160Mhz"; + break; + default: + bw = "BAD BW"; + } + + return sprintf(buf, "%s | ANT: %s BW: %s MCS: %d NSS: %d %s%s%s%s%s\n", + type, ant_name[ant], bw, mcs, nss, + (rate & RATE_MCS_SGI_MSK) ? "SGI " : "NGI ", + (rate & RATE_MCS_STBC_MSK) ? "STBC " : "", + (rate & RATE_MCS_LDPC_MSK) ? "LDPC " : "", + (rate & RATE_MCS_BF_MSK) ? "BF " : "", + (rate & RATE_MCS_ZLF_MSK) ? "ZLF " : ""); +} + static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { char *buff; int desc = 0; int i = 0; - int index = 0; ssize_t ret; struct iwl_lq_sta *lq_sta = file->private_data; @@ -2580,7 +2642,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]); mvm = lq_sta->drv; - buff = kmalloc(1024, GFP_KERNEL); + buff = kmalloc(2048, GFP_KERNEL); if (!buff) return -ENOMEM; @@ -2597,7 +2659,7 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, desc += sprintf(buff+desc, "lq type %s\n", (is_legacy(tbl->lq_type)) ? "legacy" : is_vht(tbl->lq_type) ? "VHT" : "HT"); - if (is_ht(tbl->lq_type)) { + if (!is_legacy(tbl->lq_type)) { desc += sprintf(buff+desc, " %s", (is_siso(tbl->lq_type)) ? "SISO" : "MIMO2"); desc += sprintf(buff+desc, " %s", @@ -2605,13 +2667,13 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, (is_ht40(tbl)) ? "40MHz" : (is_ht80(tbl)) ? "80Mhz" : "BAD BW"); desc += sprintf(buff+desc, " %s %s\n", - (tbl->is_SGI) ? "SGI" : "", + (tbl->is_SGI) ? "SGI" : "NGI", (lq_sta->is_agg) ? "AGG on" : ""); } desc += sprintf(buff+desc, "last tx rate=0x%X\n", lq_sta->last_rate_n_flags); desc += sprintf(buff+desc, - "general: flags=0x%X mimo-d=%d s-ant0x%x d-ant=0x%x\n", + "general: flags=0x%X mimo-d=%d s-ant=0x%x d-ant=0x%x\n", lq_sta->lq.flags, lq_sta->lq.mimo_delim, lq_sta->lq.single_stream_ant_msk, @@ -2631,19 +2693,12 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, lq_sta->lq.initial_rate_index[3]); for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { - index = iwl_hwrate_to_plcp_idx( - le32_to_cpu(lq_sta->lq.rs_table[i])); - if (is_legacy(tbl->lq_type)) { - desc += sprintf(buff+desc, " rate[%d] 0x%X %smbps\n", - i, le32_to_cpu(lq_sta->lq.rs_table[i]), - iwl_rate_mcs[index].mbps); - } else { - desc += sprintf(buff+desc, - " rate[%d] 0x%X %smbps (%s)\n", - i, le32_to_cpu(lq_sta->lq.rs_table[i]), - iwl_rate_mcs[index].mbps, - iwl_rate_mcs[index].mcs); - } + u32 rate = le32_to_cpu(lq_sta->lq.rs_table[i]); + desc += sprintf(buff+desc, + " rate[%d] 0x%X ", + i, rate); + + desc += rs_pretty_print_rate(buff+desc, rate); } ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); -- 1.7.9.5