03.08.2021 18:28, Dmitry Osipenko пишет:
> 12.07.2021 02:16, Linus Walleij пишет:
>> After some crashes in the 3D engine (!) on the Samsung GT-I8530
>> it turns out that the main firmware file can be device dependent,
>> something that was previously only handled for the NVRAM
>> parameter file.
>>
>> Rewrite the code a bit so we can a per-board suffixed firmware
>> binary as well, if this does not exist we fall back to the
>> canonical firmware name.
>>
>> Example: a 4330 device with the OF board compatible is
>> "samsung,gavini". We will first try
>> "brcmfmac4330-sdio.samsung,gavini.bin" then "brcmfmac4330-sdio.bin"
>> if that does not work.
>>
>> Cc: phone-devel@xxxxxxxxxxxxxxx
>> Cc: newbyte@xxxxxxxxxxx
>> Cc: Stephan Gerhold <stephan@xxxxxxxxxxx>
>> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
>> ---
>> .../broadcom/brcm80211/brcmfmac/firmware.c | 53 +++++++++++++++----
>> 1 file changed, 42 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
>> index d40104b8df55..adfdfc654b10 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
>> @@ -594,28 +594,47 @@ static int brcmf_fw_complete_request(const struct firmware *fw,
>> return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret;
>> }
>>
>> +static char *brcm_alt_fw_path(const char *path, const char *board_type)
>> +{
>> + char alt_path[BRCMF_FW_NAME_LEN];
>> + char suffix[5];
>> +
>> + strscpy(alt_path, path, BRCMF_FW_NAME_LEN);
>> + /* At least one character + suffix */
>> + if (strlen(alt_path) < 5)
>> + return NULL;
>> +
>> + /* strip .txt or .bin at the end */
>> + strscpy(suffix, alt_path + strlen(alt_path) - 4, 5);
>> + alt_path[strlen(alt_path) - 4] = 0;
>> + strlcat(alt_path, ".", BRCMF_FW_NAME_LEN);
>> + strlcat(alt_path, board_type, BRCMF_FW_NAME_LEN);
>> + strlcat(alt_path, suffix, BRCMF_FW_NAME_LEN);
>> +
>> + return kstrdup(alt_path, GFP_KERNEL);
>> +}
>> +
>> static int brcmf_fw_request_firmware(const struct firmware **fw,
>> struct brcmf_fw *fwctx)
>> {
>> struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos];
>> int ret;
>>
>> - /* nvram files are board-specific, first try a board-specific path */
>> + /* Files can be board-specific, first try a board-specific path */
>> if (cur->type == BRCMF_FW_TYPE_NVRAM && fwctx->req->board_type) {
>> - char alt_path[BRCMF_FW_NAME_LEN];
>> + char *alt_path;
>>
>> - strlcpy(alt_path, cur->path, BRCMF_FW_NAME_LEN);
>> - /* strip .txt at the end */
>> - alt_path[strlen(alt_path) - 4] = 0;
>> - strlcat(alt_path, ".", BRCMF_FW_NAME_LEN);
>> - strlcat(alt_path, fwctx->req->board_type, BRCMF_FW_NAME_LEN);
>> - strlcat(alt_path, ".txt", BRCMF_FW_NAME_LEN);
>> + alt_path = brcm_alt_fw_path(cur->path, fwctx->req->board_type);
>> + if (!alt_path)
>> + goto fallback;
>>
>> ret = request_firmware(fw, alt_path, fwctx->dev);
>> + kfree(alt_path);
>> if (ret == 0)
>> return ret;
>> }
>>
>> +fallback:
>> return request_firmware(fw, cur->path, fwctx->dev);
>> }
>>
>> @@ -660,6 +679,7 @@ int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req,
>> {
>> struct brcmf_fw_item *first = &req->items[0];
>> struct brcmf_fw *fwctx;
>> + char *alt_path;
>> int ret;
>>
>> brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev));
>> @@ -677,9 +697,20 @@ int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req,
>> fwctx->req = req;
>> fwctx->done = fw_cb;
>>
>> - ret = request_firmware_nowait(THIS_MODULE, true, first->path,
>> - fwctx->dev, GFP_KERNEL, fwctx,
>> - brcmf_fw_request_done);
>> + /* First try alternative board-specific path if any */
>> + alt_path = brcm_alt_fw_path(first->path, fwctx->req->board_type);
>> + if (alt_path) {
>> + ret = request_firmware_nowait(THIS_MODULE, true, alt_path,
>> + fwctx->dev, GFP_KERNEL, fwctx,
>> + brcmf_fw_request_done);
This return 0 immediately, despite of the missing firmware file. It's
not a blocking FW request.
