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mwifiex: pcie: extract wifi part from combo firmware during function level reset

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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 <huxm@marvell.com>
Signed-off-by: Ganapathi Bhat <gbhat@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Xinming Hu 2017-04-13 13:10:33 -07:00 committed by Kalle Valo
parent 127ee1db09
commit efde6648a6
3 changed files with 127 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/net/wireless/marvell/mwifiex/fw.h
View File

@ -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

114
drivers/net/wireless/marvell/mwifiex/pcie.c
View File

@ -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.
*/

3
drivers/net/wireless/marvell/mwifiex/pcie.h
View File

@ -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;