mwifiex: add firmware dump feature for PCIe

Firmware dump feature is added for PCIe based chipsets which can
be used with the help of ethtool commands.

1) Trigger firmware dump operation:
ethtool --set-dump mlan0 0xff

When the operation is completed, udev event will be sent to
trigger external application.

2) Following udev rule can be used to get the data from ethtool:
DRIVER=="mwifiex_pcie", ACTION=="change", RUN+="/sbin/mwifiex_pcie_fw_dump.sh"

mwifiex_pcie_fw_dump.sh: #!/bin/bash
ethtool --set-dump mlan0 0
ethtool --get-dump mlan0
ethtool --get-dump mlan0 data /tmp/ITCM.log

ethtool --set-dump mlan0 1
ethtool --get-dump mlan0
ethtool --get-dump mlan0 data /tmp/DTCM.log

ethtool --set-dump mlan0 2
ethtool --get-dump mlan0
ethtool --get-dump mlan0 data /tmp/SQRAM.log

ethtool --set-dump mlan0 3
ethtool --get-dump mlan0
ethtool --get-dump mlan0 data /tmp/IRAM.log

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/pcie.h b/drivers/net/wireless/mwifiex/pcie.h
index e8ec561f8a64..ee073f5c9f0d 100644
--- a/drivers/net/wireless/mwifiex/pcie.h
+++ b/drivers/net/wireless/mwifiex/pcie.h
@@ -129,6 +129,9 @@ struct mwifiex_pcie_card_reg {
         u32 ring_tx_start_ptr;
         u8 pfu_enabled;
         u8 sleep_cookie;
+        u16 fw_dump_ctrl;
+        u16 fw_dump_start;
+        u16 fw_dump_end;
 };
 
 static const struct mwifiex_pcie_card_reg mwifiex_reg_8766 = {
@@ -191,6 +194,9 @@ static const struct mwifiex_pcie_card_reg mwifiex_reg_8897 = {
         .ring_tx_start_ptr = MWIFIEX_BD_FLAG_TX_START_PTR,
         .pfu_enabled = 1,
         .sleep_cookie = 0,
+        .fw_dump_ctrl = 0xcf4,
+        .fw_dump_start = 0xcf8,
+        .fw_dump_end = 0xcff
 };
 
 struct mwifiex_pcie_device {
@@ -198,6 +204,7 @@ struct mwifiex_pcie_device {
         const struct mwifiex_pcie_card_reg *reg;
         u16 blksz_fw_dl;
         u16 tx_buf_size;
+        bool supports_fw_dump;
 };
 
 static const struct mwifiex_pcie_device mwifiex_pcie8766 = {
@@ -205,6 +212,7 @@ static const struct mwifiex_pcie_device mwifiex_pcie8766 = {
         .reg            = &mwifiex_reg_8766,
         .blksz_fw_dl = MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD,
         .tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K,
+        .supports_fw_dump = false,
 };
 
 static const struct mwifiex_pcie_device mwifiex_pcie8897 = {
@@ -212,6 +220,7 @@ static const struct mwifiex_pcie_device mwifiex_pcie8897 = {
         .reg            = &mwifiex_reg_8897,
         .blksz_fw_dl = MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD,
         .tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_4K,
+        .supports_fw_dump = true,
 };
 
 struct mwifiex_evt_buf_desc {
@@ -322,4 +331,5 @@ mwifiex_pcie_txbd_not_full(struct pcie_service_card *card)
 
         return 0;
 }
+
 #endif /* _MWIFIEX_PCIE_H */