diff options
| author | Zong-Zhe Yang <kevin_yang@realtek.com> | 2021-03-09 09:01:21 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2021-03-15 11:27:13 +0300 |
| commit | 13ce240a932fe9c809ec6e79ffc5a4d4ecf534ee (patch) | |
| tree | 3e99dc323cac81c61c22b82d03316fa35d96df32 /drivers/net/wireless/realtek/rtw88/mac.c | |
| parent | 50773696301bdd083af57bad82bb99779719f0c7 (diff) | |
| download | linux-13ce240a932fe9c809ec6e79ffc5a4d4ecf534ee.tar.xz | |
rtw88: 8822c: support FW crash dump when FW crash
Although FW crash logs are already supported for dumping in driver, the
logs may not be sufficient to analyze field issues. To improve this part,
we add a support to dump FW memory.
When driver receives FW crash notifications, driver uses DDMA, which is a
HW ability, to copy specified FW memory to FW fifo. Driver can then dump
these information from FW fifo. With this support, not only FW crash log
but also specified FW memory will be dumped while FW crash. Besides,
specified registers are also dumped.
This feature is implemeted on 8822C first due to difference of FW layouts
between ICs. In addition, we add a debugfs to trigger FW crash. It can
simulate the process of crash, dump and reset. Through it, we can also
check if a reset is ongoing.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210309060121.9099-1-pkshih@realtek.com
Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/mac.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/mac.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/mac.c b/drivers/net/wireless/realtek/rtw88/mac.c index 59028b121b00..d1678aed9d9c 100644 --- a/drivers/net/wireless/realtek/rtw88/mac.c +++ b/drivers/net/wireless/realtek/rtw88/mac.c @@ -530,6 +530,25 @@ static int iddma_download_firmware(struct rtw_dev *rtwdev, u32 src, u32 dst, return 0; } +int rtw_ddma_to_fw_fifo(struct rtw_dev *rtwdev, u32 ocp_src, u32 size) +{ + u32 ch0_ctrl = BIT_DDMACH0_OWN | BIT_DDMACH0_DDMA_MODE; + + if (!check_hw_ready(rtwdev, REG_DDMA_CH0CTRL, BIT_DDMACH0_OWN, 0)) { + rtw_dbg(rtwdev, RTW_DBG_FW, "busy to start ddma\n"); + return -EBUSY; + } + + ch0_ctrl |= size & BIT_MASK_DDMACH0_DLEN; + + if (iddma_enable(rtwdev, ocp_src, OCPBASE_RXBUF_FW_88XX, ch0_ctrl)) { + rtw_dbg(rtwdev, RTW_DBG_FW, "busy to complete ddma\n"); + return -EBUSY; + } + + return 0; +} + static bool check_fw_checksum(struct rtw_dev *rtwdev, u32 addr) { |