meson-gx-mmc: 2nd patch set
Heiner Kallweit
hkallweit1 at gmail.com
Wed Apr 5 10:56:21 PDT 2017
Am 05.04.2017 um 19:17 schrieb Helmut Klein:
> On 05.04.2017 15:37, Neil Armstrong wrote:
>> On 04/05/2017 02:38 PM, Helmut Klein wrote:
>>> On 05.04.2017 08:02, Heiner Kallweit wrote:
>>>> Am 04.04.2017 um 22:02 schrieb Helmut Klein:
>>>>> On 04.04.2017 19:37, Heiner Kallweit wrote:
>>>>>> Am 03.04.2017 um 21:50 schrieb Helmut Klein:
>>>>>>> On 29.03.2017 16:29, Helmut Klein wrote:
>>>>>>>> On 29.03.2017 07:46, Heiner Kallweit wrote:
>>>>>>>>> Am 22.03.2017 um 11:09 schrieb Helmut Klein:
>>>>>>>>>> On 20.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>> Am 20.03.2017 um 14:01 schrieb Helmut Klein:
>>>>>>>>>>>> On 20.03.2017 13:51, Helmut Klein wrote:
>>>>>>>>>>>>> On 19.03.2017 23:39, Heiner Kallweit wrote:
>>>>>>>>>>>>>> Am 19.03.2017 um 21:46 schrieb Helmut Klein:
>>>>>>>>>>>>>>> On 19.03.2017 16:35, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>> Am 19.03.2017 um 12:23 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>> On 18.03.2017 11:24, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>> Am 18.03.2017 um 09:11 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>> On 17.03.2017 20:54, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>> Am 17.03.2017 um 19:00 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>> On 17.03.2017 07:44, Heiner Kallweit wrote:
>>>>>>>>>>>>>>>>>>>>>> Am 16.03.2017 um 22:12 schrieb Helmut Klein:
>>>>>>>>>>>>>>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> i applied your 2nd patch sets to linux-amlogic. (and of
>>>>>>>>>>>>>>>>>>>>>>> course the older set v5 1...10).
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> The performance of the sd-card and the mmc-chip of my
>>>>>>>>>>>>>>>>>>>>>>> minimx
>>>>>>>>>>>>>>>>>>>>>>> is much better now.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> sd-card: from 6.5 to 22.5 MBytes/s
>>>>>>>>>>>>>>>>>>>>>>> mmc: from 14.5 to 28.5 MBytes/s (hs200 compatible device)
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> But:
>>>>>>>>>>>>>>>>>>>>>>> the wifi-adapter is no longer operational. The problem
>>>>>>>>>>>>>>>>>>>>>>> starts
>>>>>>>>>>>>>>>>>>>>>>> with patch 3 and gets worse with patch 5.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> the adapter (ap6330) is attached to the sdio port of the
>>>>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>>>>> s905. (=mmc1)
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Thanks for testing and sharing the feedback. Much
>>>>>>>>>>>>>>>>>>>>>> appreciated.
>>>>>>>>>>>>>>>>>>>>>> The board I test on supports block devices only.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Could you please share few more details:
>>>>>>>>>>>>>>>>>>>>>> - Drivers involved
>>>>>>>>>>>>>>>>>>>>>> - All syslog messages related to the device / driver
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> And please set the relevant mailing lists on cc when
>>>>>>>>>>>>>>>>>>>>>> providing
>>>>>>>>>>>>>>>>>>>>>> test feedback.
>>>>>>>>>>>>>>>>>>>>>> Others might find your feedback helpful too.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> so i think it is important to test your patch set asap
>>>>>>>>>>>>>>>>>>>>>>> on an
>>>>>>>>>>>>>>>>>>>>>>> officially supported board with a wifi adapter).
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> The driver for the wifi adapter is brcmfmac. It is
>>>>>>>>>>>>>>>>>>>>> compiled as
>>>>>>>>>>>>>>>>>>>>> a module and loaded via /etc/modules.
>>>>>>>>>>>>>>>>>>>>> the driver depends on the modules brcmutil and cfg80211,
>>>>>>>>>>>>>>>>>>>>> which
>>>>>>>>>>>>>>>>>>>>> are auto loaded.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> my user space is debian unstable. The kernel is cross
>>>>>>>>>>>>>>>>>>>>> compiled
>>>>>>>>>>>>>>>>>>>>> on my x86-64 laptop with gcc 5.4.1
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> i use my own kernel configuration without an initial ramdisk.
>>>>>>>>>>>>>>>>>>>>> mmc, usb & ext4 drivers are compiled into the kernel
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> kernel & dtb are loaded by u-boot from mmcblk2p1 (sd-card)
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> the drive for the kernel is sda2 (sd-card inside of a usb
>>>>>>>>>>>>>>>>>>>>> card
>>>>>>>>>>>>>>>>>>>>> reader).
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> here is the filtered (mmc|brcmfmac) syslog output when only
>>>>>>>>>>>>>>>>>>>>> patches 1 & 2 are applied
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [ 1.685012] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [ 1.873010] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [ 1.873258] mmcblk0: mmc0:0001 NCard 14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [ 1.876731] mmcblk0boot0: mmc0:0001 NCard partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [ 1.882597] mmcblk0boot1: mmc0:0001 NCard partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [ 2.004399] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [ 2.048160] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [ 2.066962] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.068985] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.074242] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.081275] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.124761] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [ 2.153763] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [ 2.158567] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [ 2.159219] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [ 2.164206] mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [ 6.664118] brcmfmac: brcmf_c_preinit_dcmds: Firmware
>>>>>>>>>>>>>>>>>>>>> version = wl0: Jan 6 2014 15:11:29 version 5.90.195.89.13
>>>>>>>>>>>>>>>>>>>>> FWID
>>>>>>>>>>>>>>>>>>>>> 01-72f124c5
>>>>>>>>>>>>>>>>>>>>> [ 6.736239] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>> [ 6.928045] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 184
>>>>>>>>>>>>>>>>>>>>> [ 6.930475] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 188
>>>>>>>>>>>>>>>>>>>>> [ 6.938524] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 192
>>>>>>>>>>>>>>>>>>>>> [ 6.946543] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 196
>>>>>>>>>>>>>>>>>>>>> [ 6.954566] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 200
>>>>>>>>>>>>>>>>>>>>> [ 6.954663] brcmfmac: brcmf_cfg80211_reg_notifier: not a
>>>>>>>>>>>>>>>>>>>>> ISO3166 code (0x30 0x30)
>>>>>>>>>>>>>>>>>>>>> [ 6.969995] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 204
>>>>>>>>>>>>>>>>>>>>> [ 6.978023] brcmfmac: brcmf_construct_chaninfo: Ignoring
>>>>>>>>>>>>>>>>>>>>> unexpected firmware channel 208
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> this is the output after adding patch 3
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [ 1.684982] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [ 1.873041] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [ 1.873273] mmcblk0: mmc0:0001 NCard 14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [ 1.876765] mmcblk0boot0: mmc0:0001 NCard partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [ 1.882621] mmcblk0boot1: mmc0:0001 NCard partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [ 2.004408] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [ 2.048189] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [ 2.066978] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.069001] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.074253] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.081285] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.124874] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [ 2.153475] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [ 2.158610] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [ 2.158935] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [ 2.163910] mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [ 6.586318] brcmfmac: brcmf_sdiod_ramrw: membytes transfer
>>>>>>>>>>>>>>>>>>>>> failed <<<=====
>>>>>>>>>>>>>>>>>>>>> [ 6.586810] brcmfmac: brcmf_sdio_download_code_file: error
>>>>>>>>>>>>>>>>>>>>> -84 on writing 239507 membytes at 0x00000000
>>>>>>>>>>>>>>>>>>>>> [ 6.596373] brcmfmac: brcmf_sdio_download_firmware: dongle
>>>>>>>>>>>>>>>>>>>>> image file download failed
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> and this is the output after adding patches 4 & 5
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> [ 1.684941] meson-gx-mmc d0074000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [ 1.868910] mmc0: new DDR MMC card at address 0001
>>>>>>>>>>>>>>>>>>>>> [ 1.869159] mmcblk0: mmc0:0001 NCard 14.5 GiB
>>>>>>>>>>>>>>>>>>>>> [ 1.872639] mmcblk0boot0: mmc0:0001 NCard partition 1
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [ 1.878497] mmcblk0boot1: mmc0:0001 NCard partition 2
>>>>>>>>>>>>>>>>>>>>> 4.00 MiB
>>>>>>>>>>>>>>>>>>>>> [ 1.884356] mmcblk0rpmb: mmc0:0001 NCard partition 3 128
>>>>>>>>>>>>>>>>>>>>> KiB <<<=====
>>>>>>>>>>>>>>>>>>>>> [ 2.000339] meson-gx-mmc d0070000.mmc: allocated
>>>>>>>>>>>>>>>>>>>>> mmc-pwrseq
>>>>>>>>>>>>>>>>>>>>> [ 2.044090] meson-gx-mmc d0072000.mmc: Got CD GPIO
>>>>>>>>>>>>>>>>>>>>> [ 2.062850] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.064869] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.070129] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.077161] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
>>>>>>>>>>>>>>>>>>>>> [ 2.120693] mmc2: Skipping voltage switch
>>>>>>>>>>>>>>>>>>>>> [ 2.148795] mmc1: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>>>>>> [ 2.154443] mmc2: new high speed SDHC card at address 59b4
>>>>>>>>>>>>>>>>>>>>> [ 2.154660] mmcblk2: mmc2:59b4 USD00 29.5 GiB
>>>>>>>>>>>>>>>>>>>>> [ 2.159402] mmcblk2: p1 p2
>>>>>>>>>>>>>>>>>>>>> [ 6.550881] brcmfmac: brcmf_chip_recognition: SB chip
>>>>>>>>>>>>>>>>>>>>> is not
>>>>>>>>>>>>>>>>>>>>> supported <<<=====
>>>>>>>>>>>>>>>>>>>>> [ 6.556606] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>>>>>> [ 6.563260] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>>>>>> [ 6.569796] brcmfmac: brcmf_ops_sdio_probe: F2 error,
>>>>>>>>>>>>>>>>>>>>> probe
>>>>>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks a lot for the additional information. The first version
>>>>>>>>>>>>>>>>>>>> of the patch
>>>>>>>>>>>>>>>>>>>> set broke byte mode obviously (block mode is working fine).
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Before submitting a new version of the patch set:
>>>>>>>>>>>>>>>>>>>> Could you please apply patches 1, 2, and 4 of the patch set
>>>>>>>>>>>>>>>>>>>> plus
>>>>>>>>>>>>>>>>>>>> the
>>>>>>>>>>>>>>>>>>>> following one and re-test?
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>> drivers/mmc/host/meson-gx-mmc.c | 222
>>>>>>>>>>>>>>>>>>>> ++++++++++++++++++++++------------------
>>>>>>>>>>>>>>>>>>>> 1 file changed, 124 insertions(+), 98 deletions(-)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> index 6bfd3da9..ca685902 100644
>>>>>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>>>>>> @@ -121,6 +121,13 @@
>>>>>>>>>>>>>>>>>>>> #define SD_EMMC_CFG_CMD_GAP 16 /* in clock cycles */
>>>>>>>>>>>>>>>>>>>> #define MUX_CLK_NUM_PARENTS 2
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>> + u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>> + u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>> + u32 cmd_data;
>>>>>>>>>>>>>>>>>>>> + u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>> +};
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> struct meson_host {
>>>>>>>>>>>>>>>>>>>> struct device *dev;
>>>>>>>>>>>>>>>>>>>> struct mmc_host *mmc;
>>>>>>>>>>>>>>>>>>>> @@ -136,19 +143,12 @@ struct meson_host {
>>>>>>>>>>>>>>>>>>>> struct clk_divider cfg_div;
>>>>>>>>>>>>>>>>>>>> struct clk *cfg_div_clk;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - unsigned int bounce_buf_size;
>>>>>>>>>>>>>>>>>>>> - void *bounce_buf;
>>>>>>>>>>>>>>>>>>>> - dma_addr_t bounce_dma_addr;
>>>>>>>>>>>>>>>>>>>> + struct sd_emmc_desc *descs;
>>>>>>>>>>>>>>>>>>>> + dma_addr_t descs_dma_addr;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> bool vqmmc_enabled;
>>>>>>>>>>>>>>>>>>>> };
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> -struct sd_emmc_desc {
>>>>>>>>>>>>>>>>>>>> - u32 cmd_cfg;
>>>>>>>>>>>>>>>>>>>> - u32 cmd_arg;
>>>>>>>>>>>>>>>>>>>> - u32 cmd_data;
>>>>>>>>>>>>>>>>>>>> - u32 cmd_resp;
>>>>>>>>>>>>>>>>>>>> -};
>>>>>>>>>>>>>>>>>>>> #define CMD_CFG_LENGTH_SHIFT 0
>>>>>>>>>>>>>>>>>>>> #define CMD_CFG_LENGTH_MASK 0x1ff
>>>>>>>>>>>>>>>>>>>> #define CMD_CFG_BLOCK_MODE BIT(9)
>>>>>>>>>>>>>>>>>>>> @@ -185,6 +185,36 @@ static struct mmc_command
>>>>>>>>>>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>> return NULL;
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> +static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> + return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_pre_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> + struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + if (!data)
>>>>>>>>>>>>>>>>>>>> + return;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + data->host_cookie = true;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg,
>>>>>>>>>>>>>>>>>>>> data->sg_len,
>>>>>>>>>>>>>>>>>>>> + meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>> + if (!data->sg_count)
>>>>>>>>>>>>>>>>>>>> + dev_err(mmc_dev(mmc), "dma_map_sg failed");
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> +static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>>>>>>>>>>> + int err)
>>>>>>>>>>>>>>>>>>>> +{
>>>>>>>>>>>>>>>>>>>> + struct mmc_data *data = mrq->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + if (data && data->sg_count)
>>>>>>>>>>>>>>>>>>>> + dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>> + meson_mmc_get_data_dir(data));
>>>>>>>>>>>>>>>>>>>> +}
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> static int meson_mmc_clk_set(struct meson_host *host,
>>>>>>>>>>>>>>>>>>>> unsigned
>>>>>>>>>>>>>>>>>>>> long clk_rate)
>>>>>>>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>>>>>>> struct mmc_host *mmc = host->mmc;
>>>>>>>>>>>>>>>>>>>> @@ -434,104 +464,102 @@ static void
>>>>>>>>>>>>>>>>>>>> meson_mmc_request_done(struct mmc_host *mmc,
>>>>>>>>>>>>>>>>>>>> static void meson_mmc_start_cmd(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>>>>>>> struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>> - struct sd_emmc_desc *desc, desc_tmp;
>>>>>>>>>>>>>>>>>>>> - u32 cfg;
>>>>>>>>>>>>>>>>>>>> - u8 blk_len, cmd_cfg_timeout;
>>>>>>>>>>>>>>>>>>>> - unsigned int xfer_bytes = 0;
>>>>>>>>>>>>>>>>>>>> + struct sd_emmc_desc *desc = host->descs;
>>>>>>>>>>>>>>>>>>>> + struct mmc_data *data = cmd->data;
>>>>>>>>>>>>>>>>>>>> + struct scatterlist *sg;
>>>>>>>>>>>>>>>>>>>> + u32 cfg, cmd_cfg = 0;
>>>>>>>>>>>>>>>>>>>> + u8 blk_len;
>>>>>>>>>>>>>>>>>>>> + int i;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - /* Setup descriptors */
>>>>>>>>>>>>>>>>>>>> dma_rmb();
>>>>>>>>>>>>>>>>>>>> - desc = &desc_tmp;
>>>>>>>>>>>>>>>>>>>> - memset(desc, 0, sizeof(struct sd_emmc_desc));
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= (cmd->opcode &
>>>>>>>>>>>>>>>>>>>> CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>>> - CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_OWNER; /* owned by CPU */
>>>>>>>>>>>>>>>>>>>> - desc->cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= (cmd->opcode & CMD_CFG_CMD_INDEX_MASK) <<
>>>>>>>>>>>>>>>>>>>> + CMD_CFG_CMD_INDEX_SHIFT;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_OWNER; /* owned by CPU */
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> /* Response */
>>>>>>>>>>>>>>>>>>>> if (cmd->flags & MMC_RSP_PRESENT) {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg &= ~CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>> if (cmd->flags & MMC_RSP_136)
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>> - desc->cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_RESP_128;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_RESP_NUM;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> if (!(cmd->flags & MMC_RSP_CRC))
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_RESP_NOCRC;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> if (cmd->flags & MMC_RSP_BUSY)
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_R1B;
>>>>>>>>>>>>>>>>>>>> } else {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_NO_RESP;
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - /* data? */
>>>>>>>>>>>>>>>>>>>> - if (cmd->data) {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> - if (cmd->data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> - (cmd->data->blocks & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> - CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>> + if (data) {
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + if (data->blocks > 1) {
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> /* check if block-size matches, if not update */
>>>>>>>>>>>>>>>>>>>> cfg = readl(host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>> blk_len = cfg & (CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>> blk_len >>= CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>> - if (blk_len != ilog2(cmd->data->blksz)) {
>>>>>>>>>>>>>>>>>>>> - dev_dbg(host->dev, "%s: update blk_len %d ->
>>>>>>>>>>>>>>>>>>>> %d\n",
>>>>>>>>>>>>>>>>>>>> - __func__, blk_len,
>>>>>>>>>>>>>>>>>>>> - ilog2(cmd->data->blksz));
>>>>>>>>>>>>>>>>>>>> - blk_len = ilog2(cmd->data->blksz);
>>>>>>>>>>>>>>>>>>>> + if (blk_len != ilog2(data->blksz)) {
>>>>>>>>>>>>>>>>>>>> + dev_dbg(host->dev,
>>>>>>>>>>>>>>>>>>>> + "%s: update blk_len %d -> %d\n",
>>>>>>>>>>>>>>>>>>>> + __func__, blk_len, ilog2(data->blksz));
>>>>>>>>>>>>>>>>>>>> + blk_len = ilog2(data->blksz);
>>>>>>>>>>>>>>>>>>>> cfg &= ~(CFG_BLK_LEN_MASK <<
>>>>>>>>>>>>>>>>>>>> CFG_BLK_LEN_SHIFT);
>>>>>>>>>>>>>>>>>>>> cfg |= blk_len << CFG_BLK_LEN_SHIFT;
>>>>>>>>>>>>>>>>>>>> writel(cfg, host->regs + SD_EMMC_CFG);
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>> - } else {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg &= ~CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> - (cmd->data->blksz & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> - CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - cmd->data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>> - xfer_bytes = cmd->data->blksz * cmd->data->blocks;
>>>>>>>>>>>>>>>>>>>> - if (cmd->data->flags & MMC_DATA_WRITE) {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>> - WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>> - sg_copy_to_buffer(cmd->data->sg,
>>>>>>>>>>>>>>>>>>>> cmd->data->sg_len,
>>>>>>>>>>>>>>>>>>>> - host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>> - cmd->data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>> - dma_wmb();
>>>>>>>>>>>>>>>>>>>> - } else {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg &= ~CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>> - }
>>>>>>>>>>>>>>>>>>>> + data->bytes_xfered = 0;
>>>>>>>>>>>>>>>>>>>> + if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - desc->cmd_data = host->bounce_dma_addr &
>>>>>>>>>>>>>>>>>>>> CMD_DATA_MASK;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT_DATA) <<
>>>>>>>>>>>>>>>>>>>> + CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>>>>>> + unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + if (data->blocks > 1)
>>>>>>>>>>>>>>>>>>>> + len /= data->blksz;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + desc[i].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>> + desc[i].cmd_cfg |= (len & CMD_CFG_LENGTH_MASK) <<
>>>>>>>>>>>>>>>>>>>> + CMD_CFG_LENGTH_SHIFT;
>>>>>>>>>>>>>>>>>>>> + if (i > 0)
>>>>>>>>>>>>>>>>>>>> + desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>>>>>>>>>>> + desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> + desc[i].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> + desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>>>>>>>>>>> + }
>>>>>>>>>>>>>>>>>>>> + desc[data->sg_count - 1].cmd_cfg |=
>>>>>>>>>>>>>>>>>>>> CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT_DATA);
>>>>>>>>>>>>>>>>>>>> } else {
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg &= ~CMD_CFG_DATA_IO;
>>>>>>>>>>>>>>>>>>>> - cmd_cfg_timeout = ilog2(SD_EMMC_CMD_TIMEOUT);
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= ilog2(SD_EMMC_CMD_TIMEOUT) <<
>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>> + cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>> + desc[0].cmd_cfg = cmd_cfg;
>>>>>>>>>>>>>>>>>>>> + desc[0].cmd_arg = cmd->arg;
>>>>>>>>>>>>>>>>>>>> + desc[0].cmd_resp = 0;
>>>>>>>>>>>>>>>>>>>> + desc[0].cmd_data = 0;
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= (cmd_cfg_timeout &
>>>>>>>>>>>>>>>>>>>> CMD_CFG_TIMEOUT_MASK) <<
>>>>>>>>>>>>>>>>>>>> - CMD_CFG_TIMEOUT_SHIFT;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> host->cmd = cmd;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - /* Last descriptor */
>>>>>>>>>>>>>>>>>>>> - desc->cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>>>>>>>>>> - writel(desc->cmd_cfg, host->regs + SD_EMMC_CMD_CFG);
>>>>>>>>>>>>>>>>>>>> - writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>>>>>>>>>> - writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>>>>>>>>>> wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>>>>>>>>>> - writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>>>>>>>>>> + cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>>>>>>>>>> + writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> static void meson_mmc_request(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>>>>>>> struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>>>>>>>>>>> + bool needs_pre_post_req = mrq->data &&
>>>>>>>>>>>>>>>>>>>> !mrq->data->host_cookie;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>> + meson_mmc_pre_req(mmc, mrq);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> /* Stop execution */
>>>>>>>>>>>>>>>>>>>> writel(0, host->regs + SD_EMMC_START);
>>>>>>>>>>>>>>>>>>>> @@ -540,6 +568,9 @@ static void meson_mmc_request(struct
>>>>>>>>>>>>>>>>>>>> mmc_host *mmc, struct mmc_request *mrq)
>>>>>>>>>>>>>>>>>>>> meson_mmc_start_cmd(mmc, mrq->sbc);
>>>>>>>>>>>>>>>>>>>> else
>>>>>>>>>>>>>>>>>>>> meson_mmc_start_cmd(mmc, mrq->cmd);
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + if (needs_pre_post_req)
>>>>>>>>>>>>>>>>>>>> + meson_mmc_post_req(mmc, mrq, 0);
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> static void meson_mmc_read_resp(struct mmc_host *mmc, struct
>>>>>>>>>>>>>>>>>>>> mmc_command *cmd)
>>>>>>>>>>>>>>>>>>>> @@ -560,6 +591,7 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>>>>>>> struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>> struct mmc_command *cmd;
>>>>>>>>>>>>>>>>>>>> + struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>> u32 irq_en, status, raw_status;
>>>>>>>>>>>>>>>>>>>> irqreturn_t ret = IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> @@ -571,6 +603,8 @@ static irqreturn_t meson_mmc_irq(int irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>> if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>> return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> + data = cmd->data;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> spin_lock(&host->lock);
>>>>>>>>>>>>>>>>>>>> irq_en = readl(host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>> raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>>>>>>>>>> @@ -608,12 +642,17 @@ static irqreturn_t meson_mmc_irq(int
>>>>>>>>>>>>>>>>>>>> irq,
>>>>>>>>>>>>>>>>>>>> void *dev_id)
>>>>>>>>>>>>>>>>>>>> dev_dbg(host->dev, "Unhandled IRQ: Descriptor
>>>>>>>>>>>>>>>>>>>> timeout\n");
>>>>>>>>>>>>>>>>>>>> cmd->error = -ETIMEDOUT;
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + if (data && !cmd->error)
>>>>>>>>>>>>>>>>>>>> + data->bytes_xfered = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> if (status & IRQ_SDIO)
>>>>>>>>>>>>>>>>>>>> dev_dbg(host->dev, "Unhandled IRQ: SDIO.\n");
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS))
>>>>>>>>>>>>>>>>>>>> - ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>> - else {
>>>>>>>>>>>>>>>>>>>> + if (status & (IRQ_END_OF_CHAIN | IRQ_RESP_STATUS)) {
>>>>>>>>>>>>>>>>>>>> + if (meson_mmc_get_next_command(cmd))
>>>>>>>>>>>>>>>>>>>> + ret = IRQ_WAKE_THREAD;
>>>>>>>>>>>>>>>>>>>> + } else {
>>>>>>>>>>>>>>>>>>>> dev_warn(host->dev, "Unknown IRQ! status=0x%04x: MMC
>>>>>>>>>>>>>>>>>>>> CMD%u arg=0x%08x flags=0x%08x stop=%d\n",
>>>>>>>>>>>>>>>>>>>> status, cmd->opcode, cmd->arg,
>>>>>>>>>>>>>>>>>>>> cmd->flags, cmd->mrq->stop ? 1 : 0);
>>>>>>>>>>>>>>>>>>>> @@ -642,26 +681,12 @@ static irqreturn_t
>>>>>>>>>>>>>>>>>>>> meson_mmc_irq_thread(int irq, void *dev_id)
>>>>>>>>>>>>>>>>>>>> {
>>>>>>>>>>>>>>>>>>>> struct meson_host *host = dev_id;
>>>>>>>>>>>>>>>>>>>> struct mmc_command *next_cmd, *cmd = host->cmd;
>>>>>>>>>>>>>>>>>>>> - struct mmc_data *data;
>>>>>>>>>>>>>>>>>>>> - unsigned int xfer_bytes;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> if (WARN_ON(!cmd))
>>>>>>>>>>>>>>>>>>>> return IRQ_NONE;
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - data = cmd->data;
>>>>>>>>>>>>>>>>>>>> - if (data && data->flags & MMC_DATA_READ) {
>>>>>>>>>>>>>>>>>>>> - xfer_bytes = data->blksz * data->blocks;
>>>>>>>>>>>>>>>>>>>> - WARN_ON(xfer_bytes > host->bounce_buf_size);
>>>>>>>>>>>>>>>>>>>> - sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>>>>>>>>>>> - host->bounce_buf, xfer_bytes);
>>>>>>>>>>>>>>>>>>>> - data->bytes_xfered = xfer_bytes;
>>>>>>>>>>>>>>>>>>>> - }
>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>> next_cmd = meson_mmc_get_next_command(cmd);
>>>>>>>>>>>>>>>>>>>> - if (next_cmd)
>>>>>>>>>>>>>>>>>>>> - meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>> - else
>>>>>>>>>>>>>>>>>>>> - meson_mmc_request_done(host->mmc, cmd->mrq);
>>>>>>>>>>>>>>>>>>>> + meson_mmc_start_cmd(host->mmc, next_cmd);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> return IRQ_HANDLED;
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>> @@ -695,6 +720,8 @@ static const struct mmc_host_ops
>>>>>>>>>>>>>>>>>>>> meson_mmc_ops = {
>>>>>>>>>>>>>>>>>>>> .request = meson_mmc_request,
>>>>>>>>>>>>>>>>>>>> .set_ios = meson_mmc_set_ios,
>>>>>>>>>>>>>>>>>>>> .get_cd = meson_mmc_get_cd,
>>>>>>>>>>>>>>>>>>>> + .pre_req = meson_mmc_pre_req,
>>>>>>>>>>>>>>>>>>>> + .post_req = meson_mmc_post_req,
>>>>>>>>>>>>>>>>>>>> };
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> static int meson_mmc_probe(struct platform_device *pdev)
>>>>>>>>>>>>>>>>>>>> @@ -774,15 +801,14 @@ static int meson_mmc_probe(struct
>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> mmc->caps |= MMC_CAP_CMD23;
>>>>>>>>>>>>>>>>>>>> mmc->max_blk_count = CMD_CFG_LENGTH_MASK;
>>>>>>>>>>>>>>>>>>>> - mmc->max_req_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>> -
>>>>>>>>>>>>>>>>>>>> - /* data bounce buffer */
>>>>>>>>>>>>>>>>>>>> - host->bounce_buf_size = mmc->max_req_size;
>>>>>>>>>>>>>>>>>>>> - host->bounce_buf =
>>>>>>>>>>>>>>>>>>>> - dma_alloc_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>> - &host->bounce_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>> - if (host->bounce_buf == NULL) {
>>>>>>>>>>>>>>>>>>>> - dev_err(host->dev, "Unable to map allocate DMA bounce
>>>>>>>>>>>>>>>>>>>> buffer.\n");
>>>>>>>>>>>>>>>>>>>> + mmc->max_segs = PAGE_SIZE / sizeof(struct sd_emmc_desc);
>>>>>>>>>>>>>>>>>>>> + mmc->max_seg_size = mmc->max_blk_count *
>>>>>>>>>>>>>>>>>>>> mmc->max_blk_size;
>>>>>>>>>>>>>>>>>>>> + mmc->max_req_size = mmc->max_seg_size * mmc->max_segs;
>>>>>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>>>>>> + host->descs = dma_alloc_coherent(host->dev, PAGE_SIZE,
>>>>>>>>>>>>>>>>>>>> + &host->descs_dma_addr, GFP_KERNEL);
>>>>>>>>>>>>>>>>>>>> + if (!host->descs) {
>>>>>>>>>>>>>>>>>>>> + dev_err(host->dev, "Allocating descriptor DMA buffer
>>>>>>>>>>>>>>>>>>>> failed\n");
>>>>>>>>>>>>>>>>>>>> ret = -ENOMEM;
>>>>>>>>>>>>>>>>>>>> goto err_div_clk;
>>>>>>>>>>>>>>>>>>>> }
>>>>>>>>>>>>>>>>>>>> @@ -807,8 +833,8 @@ static int meson_mmc_remove(struct
>>>>>>>>>>>>>>>>>>>> platform_device *pdev)
>>>>>>>>>>>>>>>>>>>> /* disable interrupts */
>>>>>>>>>>>>>>>>>>>> writel(0, host->regs + SD_EMMC_IRQ_EN);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> - dma_free_coherent(host->dev, host->bounce_buf_size,
>>>>>>>>>>>>>>>>>>>> - host->bounce_buf, host->bounce_dma_addr);
>>>>>>>>>>>>>>>>>>>> + dma_free_coherent(host->dev, PAGE_SIZE, host->descs,
>>>>>>>>>>>>>>>>>>>> + host->descs_dma_addr);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> clk_disable_unprepare(host->cfg_div_clk);
>>>>>>>>>>>>>>>>>>>> clk_disable_unprepare(host->core_clk);
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> compared to the patches 1...5 there is absolutely no change to
>>>>>>>>>>>>>>>>>>> patches 1, 2, 4 and the above. Neither syslog nor performance.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks for re-testing. I have a little bit of a hard time to
>>>>>>>>>>>>>>>>>> understand why SD and eMMC mode
>>>>>>>>>>>>>>>>>> are working but SDIO (at least with brcfmac) is not.
>>>>>>>>>>>>>>>>>> Especially as
>>>>>>>>>>>>>>>>>> I don't have HW to test SDIO mode on.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> After patches 1, 2, 4 the system is still working normally?
>>>>>>>>>>>>>>>>>> And would it be possible for you to compile a DEBUG kernel and
>>>>>>>>>>>>>>>>>> post the mmc/brcmfmac related output?
>>>>>>>>>>>>>>>>>> In DEBUG mode mode brcmfmac driver logs all SDIO transfers.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Last but not least, could you please post /proc/interrupts ?
>>>>>>>>>>>>>>>>>> This
>>>>>>>>>>>>>>>>>> would give an idea whether any SDIO
>>>>>>>>>>>>>>>>>> or just specific ones fail.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> regards
>>>>>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> i enabled the debug flags for mmc and brcmfmac in the kernel
>>>>>>>>>>>>>>>>> configuration.
>>>>>>>>>>>>>>>>> For the test i also changed meson-gx-mmc from built-in to module.
>>>>>>>>>>>>>>>>> This resulted in a different order of the mmc devices. The
>>>>>>>>>>>>>>>>> sdio/wifi is now mmc0 and not mmc1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Without your new patch the wifi adapter works normally.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> The debug info was produced with following commad sequence
>>>>>>>>>>>>>>>>> dmesg -n 8
>>>>>>>>>>>>>>>>> dmesg -D
>>>>>>>>>>>>>>>>> logger "loading meson-gx-mmc...."
>>>>>>>>>>>>>>>>> modprobe meson-gx-mmc
>>>>>>>>>>>>>>>>> sleep 1
>>>>>>>>>>>>>>>>> logger "loading brcmfmac"
>>>>>>>>>>>>>>>>> modprobe brcmfmac
>>>>>>>>>>>>>>>>> logger "modules loaded"
>>>>>>>>>>>>>>>>> sleep 1
>>>>>>>>>>>>>>>>> cp /var/log/syslog ~/syslog
>>>>>>>>>>>>>>>>> cp /proc/interrupts ~/interrupts
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> and filtered with: egrep "brcmfmac|mmc0|meson-gx-mmc"
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> because of the length of the files i removed most lines of the
>>>>>>>>>>>>>>>>> loading of meson-gx-mmc
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> unhandled interrupts: independent of the number of applied
>>>>>>>>>>>>>>>>> patches
>>>>>>>>>>>>>>>>> i've always got 11 of them.
>>>>>>>>>>>>>>>>> Only the timings differed with the applied patches
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> the is the log for applied patches 1, 2, 4 & the new one
>>>>>>>>>>>>>>>>> [ 47.371608] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>> [ 47.371616] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 47.371621] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>> [ 47.371629] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 47.371635] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>> [ 47.371642] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 47.371648] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>> [ 47.371656] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 47.371662] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>> [ 47.371670] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 47.371679] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>> [ 47.371687] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 47.371694] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>> [ 47.371702] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 47.371716] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [ 47.372210] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>> [ 47.373142] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>> [ 47.374077] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>> [ 47.375021] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>> [ 47.375950] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>> [ 47.376859] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>> [ 47.377770] meson-gx-mmc d0074000.mmc: Unhandled IRQ:
>>>>>>>>>>>>>>>>> Response
>>>>>>>>>>>>>>>>> timeout
>>>>>>>>>>>>>>>>> [ 47.496509] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>> [ 47.496541] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>> [ 47.496602] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>> [ 47.497276] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>> loading brcmfmac
>>>>>>>>>>>>>>>>> [ 48.731368] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>> [ 48.731451] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731471] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731499] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731507] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>> [ 48.731510] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>> [ 48.731512] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>> [ 48.731515] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>> [ 48.731517] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>> [ 48.731538] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731548] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731555] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731564] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731580] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>> [ 48.731582] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>> [ 48.731584] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>> [ 48.731586] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>> [ 48.731588] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>> [ 48.731593] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>> [ 48.731596] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731606] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731613] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731622] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731629] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731638] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731644] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731653] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731661] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>> [ 48.731664] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731673] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731680] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731689] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731697] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731706] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731713] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>> [ 48.731717] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>> [ 48.731795] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>> [ 48.731800] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731804] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731813] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731821] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731824] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731833] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731840] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731843] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731851] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731858] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>> [ 48.731863] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>> [ 48.731866] mmc0: blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>> [ 48.731878] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731881] mmc0: 4 bytes transferred: 0
>>>>>>>>>>>>>>>>> [ 48.731887] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>> data:0x00000000 <<<<===== wrong!
>>>>>>>>>>>>>>>>> [ 48.731890] brcmfmac: F1 signature read @0x18000000=0x 0
>>>>>>>>>>>>>>>>> [ 48.731892] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>> [ 48.731895] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731898] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731906] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731912] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>> [ 48.731915] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731918] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731926] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731931] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>> [ 48.731936] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>> [ 48.731938] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731941] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731950] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731957] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>> [ 48.731960] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731962] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.731970] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.731985] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>> [ 48.731987] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>> [ 48.731990] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.731993] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.732001] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.732019] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>> [ 48.732021] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x21
>>>>>>>>>>>>>>>>> [ 48.732024] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.732027] mmc0: starting CMD52 arg 92001c21 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.732037] mmc0: req done (CMD52): 0: 00001021 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.732151] brcmfmac: brcmf_sdiod_regwb addr:0x0001000f,
>>>>>>>>>>>>>>>>> data:0x00
>>>>>>>>>>>>>>>>> [ 48.732160] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000f, nbytes=1
>>>>>>>>>>>>>>>>> [ 48.732167] mmc0: starting CMD52 arg 92001e00 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.732181] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.732193] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>> [ 48.732200] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>> [ 48.732208] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>> [ 48.732214] mmc0: blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>> [ 48.732228] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.732235] mmc0: 4 bytes transferred: 0
>>>>>>>>>>>>>>>>> [ 48.732246] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>>> [ 48.732254] brcmfmac: brcmf_chip_recognition found SB chip:
>>>>>>>>>>>>>>>>> BCM0, rev=0
>>>>>>>>>>>>>>>>> [ 48.732260] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>>>>>>>>> supported
>>>>>>>>>>>>>>>>> [ 48.732266] brcmfmac: brcmf_sdio_probe_attach:
>>>>>>>>>>>>>>>>> brcmf_chip_attach failed!
>>>>>>>>>>>>>>>>> [ 48.732273] brcmfmac: brcmf_sdio_probe:
>>>>>>>>>>>>>>>>> brcmf_sdio_probe_attach failed
>>>>>>>>>>>>>>>>> [ 48.732280] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>>>>>>>> [ 48.732285] brcmfmac: brcmf_sdiod_intr_unregister Entering
>>>>>>>>>>>>>>>>> oob=0 sd=0
>>>>>>>>>>>>>>>>> [ 48.732290] brcmfmac: brcmf_detach Enter
>>>>>>>>>>>>>>>>> [ 48.733671] brcmfmac: brcmf_sdio_remove Disconnected
>>>>>>>>>>>>>>>>> [ 48.733683] SDIO: Disabling device mmc0:0001:2...
>>>>>>>>>>>>>>>>> [ 48.733689] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.733709] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.733717] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.733727] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.733732] SDIO: Disabled device mmc0:0001:2
>>>>>>>>>>>>>>>>> [ 48.733736] SDIO: Disabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>> [ 48.733739] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.733749] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.733760] mmc0: starting CMD52 arg 80000400 flags 00000195
>>>>>>>>>>>>>>>>> [ 48.733768] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 48.733773] SDIO: Disabled device mmc0:0001:1
>>>>>>>>>>>>>>>>> [ 48.733777] brcmfmac: brcmf_ops_sdio_probe: F2 error, probe
>>>>>>>>>>>>>>>>> failed -19...
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> this is the debug data for applied patches 1,2 & 4 (left only few
>>>>>>>>>>>>>>>>> lines after the first CMD53)
>>>>>>>>>>>>>>>>> [ 52.458082] mmc0: starting CMD52 arg 0020d000 flags 00000195
>>>>>>>>>>>>>>>>> [ 52.458093] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 52.458098] mmc0: starting CMD52 arg 0020d200 flags 00000195
>>>>>>>>>>>>>>>>> [ 52.458108] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 52.458116] mmc0: starting CMD52 arg 0020d400 flags 00000195
>>>>>>>>>>>>>>>>> [ 52.458130] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 52.458135] mmc0: starting CMD52 arg 0020d600 flags 00000195
>>>>>>>>>>>>>>>>> [ 52.458147] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 52.458152] mmc0: starting CMD52 arg 0020d800 flags 00000195
>>>>>>>>>>>>>>>>> [ 52.458165] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 52.458171] mmc0: starting CMD52 arg 0020da00 flags 00000195
>>>>>>>>>>>>>>>>> [ 52.458187] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 52.458193] mmc0: starting CMD52 arg 0020dc00 flags 00000195
>>>>>>>>>>>>>>>>> [ 52.458204] mmc0: req done (CMD52): 0: 000010ff 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 52.458217] mmc0: new high speed SDIO card at address 0001
>>>>>>>>>>>>>>>>> [ 52.560803] meson-gx-mmc d0074000.mmc: change clock rate
>>>>>>>>>>>>>>>>> 400000 -> 52000000
>>>>>>>>>>>>>>>>> [ 52.560834] meson-gx-mmc d0074000.mmc: divider requested
>>>>>>>>>>>>>>>>> rate
>>>>>>>>>>>>>>>>> 52000000 != actual rate 50000000
>>>>>>>>>>>>>>>>> [ 52.560900] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004890 -> 0x00004892
>>>>>>>>>>>>>>>>> [ 52.561583] meson-gx-mmc d0074000.mmc: meson_mmc_set_ios:
>>>>>>>>>>>>>>>>> SD_EMMC_CFG: 0x00004892 -> 0x00004896
>>>>>>>>>>>>>>>>> loading brcmfmac
>>>>>>>>>>>>>>>>> [ 53.796217] brcmfmac: brcmfmac_module_init No platform data
>>>>>>>>>>>>>>>>> available.
>>>>>>>>>>>>>>>>> [ 53.796291] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796327] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796336] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796349] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796366] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>> [ 53.796368] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>> [ 53.796370] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>> [ 53.796372] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>> [ 53.796375] brcmfmac: brcmf_ops_sdio_probe Function#: 1
>>>>>>>>>>>>>>>>> [ 53.796398] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796414] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796422] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796436] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796444] brcmfmac: brcmf_ops_sdio_probe Enter
>>>>>>>>>>>>>>>>> [ 53.796446] brcmfmac: brcmf_ops_sdio_probe Class=0
>>>>>>>>>>>>>>>>> [ 53.796448] brcmfmac: brcmf_ops_sdio_probe sdio vendor
>>>>>>>>>>>>>>>>> ID: 0x02d0
>>>>>>>>>>>>>>>>> [ 53.796450] brcmfmac: brcmf_ops_sdio_probe sdio device
>>>>>>>>>>>>>>>>> ID: 0x4330
>>>>>>>>>>>>>>>>> [ 53.796452] brcmfmac: brcmf_ops_sdio_probe Function#: 2
>>>>>>>>>>>>>>>>> [ 53.796458] brcmfmac: brcmf_ops_sdio_probe F2 found, calling
>>>>>>>>>>>>>>>>> brcmf_sdiod_probe...
>>>>>>>>>>>>>>>>> [ 53.796461] mmc0: starting CMD52 arg 80022040 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796478] mmc0: req done (CMD52): 0: 00001040 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796489] mmc0: starting CMD52 arg 80022200 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796502] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796509] mmc0: starting CMD52 arg 80042000 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796521] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796527] mmc0: starting CMD52 arg 80042202 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796541] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796550] SDIO: Enabling device mmc0:0001:1...
>>>>>>>>>>>>>>>>> [ 53.796552] mmc0: starting CMD52 arg 00000400 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796564] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796570] mmc0: starting CMD52 arg 80000402 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796583] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796589] mmc0: starting CMD52 arg 00000600 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796600] mmc0: req done (CMD52): 0: 00001002 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796605] SDIO: Enabled device mmc0:0001:1
>>>>>>>>>>>>>>>>> [ 53.796609] brcmfmac: brcmf_sdio_probe Enter
>>>>>>>>>>>>>>>>> [ 53.796686] brcmfmac: brcmf_sdiod_regrl addr:0x18000000
>>>>>>>>>>>>>>>>> [ 53.796691] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000a, nbytes=1
>>>>>>>>>>>>>>>>> [ 53.796695] mmc0: starting CMD52 arg 92001400 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796707] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796715] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000b, nbytes=1
>>>>>>>>>>>>>>>>> [ 53.796718] mmc0: starting CMD52 arg 92001600 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796729] mmc0: req done (CMD52): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796743] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000c, nbytes=1
>>>>>>>>>>>>>>>>> [ 53.796746] mmc0: starting CMD52 arg 92001818 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796758] mmc0: req done (CMD52): 0: 00001018 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796801] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>>>> [ 53.796807] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>>>> [ 53.796810] mmc0: blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>>>> 1000 ms nsac 0
>>>>>>>>>>>>>>>>> [ 53.796826] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796829] mmc0: 4 bytes transferred: 0
>>>>>>>>>>>>>>>>> [ 53.796836] brcmfmac: brcmf_sdiod_regrl
>>>>>>>>>>>>>>>>> data:0x16044330 <<<<<====== ok
>>>>>>>>>>>>>>>>> [ 53.796839] brcmfmac: F1 signature read
>>>>>>>>>>>>>>>>> @0x18000000=0x16044330
>>>>>>>>>>>>>>>>> [ 53.796841] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>> [ 53.796844] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 53.796847] mmc0: starting CMD52 arg 92001c28 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796858] mmc0: req done (CMD52): 0: 00001028 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796872] brcmfmac: brcmf_sdiod_regrb addr:0x0001000e
>>>>>>>>>>>>>>>>> [ 53.796875] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>> [ 53.796878] mmc0: starting CMD52 arg 12001c00 flags 00000195
>>>>>>>>>>>>>>>>> [ 53.796890] mmc0: req done (CMD52): 0: 00001068 00000000
>>>>>>>>>>>>>>>>> 00000000 00000000
>>>>>>>>>>>>>>>>> [ 53.796897] brcmfmac: brcmf_sdiod_regrb data:0x68
>>>>>>>>>>>>>>>>> [ 53.796902] brcmfmac: brcmf_sdiod_regwb addr:0x0001000e,
>>>>>>>>>>>>>>>>> data:0x28
>>>>>>>>>>>>>>>>> [ 53.796905] brcmfmac: brcmf_sdiod_request_data rw=1, func=1,
>>>>>>>>>>>>>>>>> addr=0x1000e, nbytes=1
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> if you need more data: just ask ;-)
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Thanks a lot for the logs. So the first read returns 0 instead of
>>>>>>>>>>>>>>>> the actual register value.
>>>>>>>>>>>>>>>> Could you please apply the following on top of 1, 2, 4, new one
>>>>>>>>>>>>>>>> and
>>>>>>>>>>>>>>>> send the log?
>>>>>>>>>>>>>>>> I hope the two debug messages bring me closer to the root cause of
>>>>>>>>>>>>>>>> the issue.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Rgds, Heiner
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> index 3b3ddf3e..d6d2d1a1 100644
>>>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>>>> @@ -613,6 +613,9 @@ static void meson_mmc_start_cmd(struct
>>>>>>>>>>>>>>>> mmc_host
>>>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>>>> for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>>>> unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> + if (cmd->opcode == 53)
>>>>>>>>>>>>>>>> + dev_info(host->info, "cmd 53: idx %d len
>>>>>>>>>>>>>>>> %u\n", i,
>>>>>>>>>>>>>>>> len);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> if (data->blocks > 1)
>>>>>>>>>>>>>>>> len /= data->blksz;
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> @@ -709,6 +712,9 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> + if (cmd->opcode == 53)
>>>>>>>>>>>>>>>> + dev_info(host->dev, "cmd 53: cmd_data_0: %08x\n",
>>>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>>>> +
>>>>>>>>>>>>>>>> cmd->error = 0;
>>>>>>>>>>>>>>>> if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>>>> dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> here is the output:
>>>>>>>>>>>>>>> [ 107.510508] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>>>>>>> [ 107.510513] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>>>>>>> [ 107.510516] mmc0: blksz 4 blocks 1 flags 00000200 tsac
>>>>>>>>>>>>>>> 1000 ms
>>>>>>>>>>>>>>> nsac 0
>>>>>>>>>>>>>>> [ 107.510525] meson-gx-mmc d0070000.mmc: cmd 53: idx 0 len 4
>>>>>>>>>>>>>>> [ 107.510535] meson-gx-mmc d0070000.mmc: cmd 53: cmd_data_0:
>>>>>>>>>>>>>>> 721d0eb4
>>>>>>>>>>>>>>> [ 107.510539] mmc0: req done (CMD53): 0: 00001000 00000000
>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>> 00000000
>>>>>>>>>>>>>>> [ 107.510541] mmc0: 4 bytes transferred: 0
>>>>>>>>>>>>>>> [ 107.510548] brcmfmac: brcmf_sdiod_regrl data:0x00000000
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Weird .. Everything looks ok so far. I don't see a reason why this
>>>>>>>>>>>>>> small read DMA returns
>>>>>>>>>>>>>> zeroed bytes only whilst bigger ones in SD/eMMC work perfectly fine.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> OK, one last attempt before I have to think about a better way to
>>>>>>>>>>>>>> tackle this issue.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Could you please replace the last logging extension patch with
>>>>>>>>>>>>>> this one?
>>>>>>>>>>>>>> (I just added a memory barrier to be sure to read the actual value.)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Thanks, Heiner
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> index ca685902..5b511944 100644
>>>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>>>>> @@ -523,6 +523,9 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>>>>> for_each_sg(data->sg, sg, data->sg_count, i) {
>>>>>>>>>>>>>> unsigned int len = sg_dma_len(sg);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> + if (cmd->opcode == 53)
>>>>>>>>>>>>>> + pr_info("sg: idx %d len %u\n", i, len);
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> if (data->blocks > 1)
>>>>>>>>>>>>>> len /= data->blksz;
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> @@ -619,6 +622,11 @@ static irqreturn_t meson_mmc_irq(int irq, void
>>>>>>>>>>>>>> *dev_id)
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> meson_mmc_read_resp(host->mmc, cmd);
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> + if (cmd->opcode == 53) {
>>>>>>>>>>>>>> + dma_rmb();
>>>>>>>>>>>>>> + pr_info("cmd 53 cmd_data0: %08x\n",
>>>>>>>>>>>>>> host->descs[0].cmd_data);
>>>>>>>>>>>>>> + }
>>>>>>>>>>>>>> +
>>>>>>>>>>>>>> cmd->error = 0;
>>>>>>>>>>>>>> if (status & IRQ_RXD_ERR_MASK) {
>>>>>>>>>>>>>> dev_dbg(host->dev, "Unhandled IRQ: RXD error\n");
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> the output is not really different (for the 2 cmd53)
>>>>>>>>>>>>> [ 37.113577] sg: idx 0 len 4
>>>>>>>>>>>>> [ 37.113595] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0: 72091ab4
>>>>>>>>>>>>> [ 37.114016] sg: idx 0 len 4
>>>>>>>>>>>>> [ 37.114034] meson-gx-mmc d0070000.mmc: cmd 53 cmd_data0: 72091ab4
>>>>>>>>>>>>>
>>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> I've added my own debugging code to both variations of the driver.
>>>>>>>>>>>> but without a positiv result
>>>>>>>>>>>>
>>>>>>>>>>>> here are the patches
>>>>>>>>>>>>
>>>>>>>>>>>> for the fully operational version
>>>>>>>>>>>>
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c 2017-03-18
>>>>>>>>>>>> 15:22:31.000000000 +0100
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c 2017-03-20
>>>>>>>>>>>> 13:02:05.254762191 +0100
>>>>>>>>>>>> @@ -468,6 +468,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>>
>>>>>>>>>>>> /* data? */
>>>>>>>>>>>> if (cmd->data) {
>>>>>>>>>>>> +
>>>>>>>>>>>> + dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>> +
>>>>>>>>>>>> desc->cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>> if (cmd->data->blocks > 1) {
>>>>>>>>>>>> desc->cmd_cfg |= CMD_CFG_BLOCK_MODE;
>>>>>>>>>>>> @@ -526,6 +529,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>> writel(desc->cmd_data, host->regs + SD_EMMC_CMD_DAT);
>>>>>>>>>>>> writel(desc->cmd_resp, host->regs + SD_EMMC_CMD_RSP);
>>>>>>>>>>>> wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> +
>>>>>>>>>>>> + dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>> + desc->cmd_cfg, desc->cmd_arg, desc->cmd_resp);
>>>>>>>>>>>> +
>>>>>>>>>>>> writel(desc->cmd_arg, host->regs + SD_EMMC_CMD_ARG);
>>>>>>>>>>>> }
>>>>>>>>>>>>
>>>>>>>>>>>> @@ -576,6 +583,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>> raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>> status = raw_status & irq_en;
>>>>>>>>>>>>
>>>>>>>>>>>> + dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>> +
>>>>>>>>>>>> if (!status) {
>>>>>>>>>>>> dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>> raw_status, irq_en);
>>>>>>>>>>>>
>>>>>>>>>>>> and this is for the version with the sdio problem
>>>>>>>>>>>>
>>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c 2017-03-20
>>>>>>>>>>>> 12:50:32.956474080 +0100
>>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c 2017-03-20
>>>>>>>>>>>> 12:57:27.185837225 +0100
>>>>>>>>>>>> @@ -493,6 +493,9 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>> }
>>>>>>>>>>>>
>>>>>>>>>>>> if (data) {
>>>>>>>>>>>> +
>>>>>>>>>>>> + dev_dbg(host->dev, "DBG data");
>>>>>>>>>>>> +
>>>>>>>>>>>> cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>>
>>>>>>>>>>>> if (data->blocks > 1) {
>>>>>>>>>>>> @@ -549,6 +552,10 @@ static void meson_mmc_start_cmd(struct m
>>>>>>>>>>>> host->cmd = cmd;
>>>>>>>>>>>>
>>>>>>>>>>>> wmb(); /* ensure descriptor is written before kicked */
>>>>>>>>>>>> +
>>>>>>>>>>>> + dev_dbg(host->dev, "DBG cmd_cfg: 0x%08x, arg: 0x%08x, resp:
>>>>>>>>>>>> 0x%08x",
>>>>>>>>>>>> + desc[0].cmd_cfg, desc[0].cmd_arg, desc[0].cmd_resp);
>>>>>>>>>>>> +
>>>>>>>>>>>> cfg = host->descs_dma_addr | START_DESC_BUSY;
>>>>>>>>>>>> writel(cfg, host->regs + SD_EMMC_START);
>>>>>>>>>>>> }
>>>>>>>>>>>> @@ -610,6 +617,8 @@ static irqreturn_t meson_mmc_irq(int irq
>>>>>>>>>>>> raw_status = readl(host->regs + SD_EMMC_STATUS);
>>>>>>>>>>>> status = raw_status & irq_en;
>>>>>>>>>>>>
>>>>>>>>>>>> + dev_dbg(host->dev, "DBG status 0x%08x", status);
>>>>>>>>>>>> +
>>>>>>>>>>>> if (!status) {
>>>>>>>>>>>> dev_warn(host->dev, "Spurious IRQ! status=0x%08x,
>>>>>>>>>>>> irq_en=0x%08x\n",
>>>>>>>>>>>> raw_status, irq_en);
>>>>>>>>>>>>
>>>>>>>>>>>> the filtered logs are identical up and including the 2nd cmd53.
>>>>>>>>>>>>
>>>>>>>>>>>> Helmut
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> Thanks. Really appreciate your support. Meanwhile I think there must
>>>>>>>>>>> be a bug
>>>>>>>>>>> either in the DMA subsystem or there's a hw bug causing issues with
>>>>>>>>>>> very small
>>>>>>>>>>> transfers. That's the only difference between SD/eMMC and SDIO on
>>>>>>>>>>> that level:
>>>>>>>>>>> SD/eMMC always transfers 512 byte blocks whilst SDIO also uses very
>>>>>>>>>>> small
>>>>>>>>>>> transfers.
>>>>>>>>>>>
>>>>>>>>>>> For up to 4 bytes the chip supports an alternative transfer method.
>>>>>>>>>>> Let's try this as workaround.
>>>>>>>>>>>
>>>>>>>>>>> Could you please apply:
>>>>>>>>>>> patches 1, 2, 4 + the updated bigger patch I sent via mail + the
>>>>>>>>>>> following:
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> diff --git a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> index 4f9fafd3..cf9be13f 100644
>>>>>>>>>>> --- a/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> +++ b/drivers/mmc/host/meson-gx-mmc.c
>>>>>>>>>>> @@ -185,6 +185,12 @@ static struct mmc_command
>>>>>>>>>>> *meson_mmc_get_next_command(struct mmc_command *cmd)
>>>>>>>>>>> return NULL;
>>>>>>>>>>> }
>>>>>>>>>>>
>>>>>>>>>>> +static bool meson_mmc_small_read(const struct mmc_data *data)
>>>>>>>>>>> +{
>>>>>>>>>>> + return data && data->blocks <= 1 && data->blksz <= 4 &&
>>>>>>>>>>> + data->flags & MMC_DATA_READ;
>>>>>>>>>>> +}
>>>>>>>>>>> +
>>>>>>>>>>> static enum dma_data_direction meson_mmc_get_data_dir(struct
>>>>>>>>>>> mmc_data *data)
>>>>>>>>>>> {
>>>>>>>>>>> return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE :
>>>>>>>>>>> DMA_FROM_DEVICE;
>>>>>>>>>>> @@ -208,11 +214,22 @@ static void meson_mmc_pre_req(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_request *mrq)
>>>>>>>>>>> static void meson_mmc_post_req(struct mmc_host *mmc, struct
>>>>>>>>>>> mmc_request *mrq,
>>>>>>>>>>> int err)
>>>>>>>>>>> {
>>>>>>>>>>> + struct meson_host *host = mmc_priv(mmc);
>>>>>>>>>>> struct mmc_data *data = mrq->data;
>>>>>>>>>>>
>>>>>>>>>>> if (data && data->sg_count)
>>>>>>>>>>> dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len,
>>>>>>>>>>> meson_mmc_get_data_dir(data));
>>>>>>>>>>> +
>>>>>>>>>>> + if (meson_mmc_small_read(data)) {
>>>>>>>>>>> + int cnt;
>>>>>>>>>>> +
>>>>>>>>>>> + dma_rmb();
>>>>>>>>>>> + cnt = sg_copy_from_buffer(data->sg, data->sg_len,
>>>>>>>>>>> + &host->descs[0].cmd_data, data->blksz);
>>>>>>>>>>> + if (cnt != data->blksz)
>>>>>>>>>>> + dev_err(host->dev, "error copying to scatterlist\n");
>>>>>>>>>>> + }
>>>>>>>>>>> }
>>>>>>>>>>>
>>>>>>>>>>> static int meson_mmc_clk_set(struct meson_host *host, unsigned long
>>>>>>>>>>> clk_rate)
>>>>>>>>>>> @@ -493,6 +510,8 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>> }
>>>>>>>>>>>
>>>>>>>>>>> if (data) {
>>>>>>>>>>> + bool small_read = meson_mmc_small_read(data);
>>>>>>>>>>> +
>>>>>>>>>>> cmd_cfg |= CMD_CFG_DATA_IO;
>>>>>>>>>>>
>>>>>>>>>>> if (data->blocks > 1) {
>>>>>>>>>>> @@ -513,6 +532,14 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>> }
>>>>>>>>>>> }
>>>>>>>>>>>
>>>>>>>>>>> + /*
>>>>>>>>>>> + * workaround for most likely hw bug
>>>>>>>>>>> + * if up to 4 bytes receive them in the descriptor instead
>>>>>>>>>>> + * of using dma_map_sg/dma_unmap_sg
>>>>>>>>>>> + */
>>>>>>>>>>> + if (small_read)
>>>>>>>>>>> + cmd_cfg |= CMD_CFG_DATA_NUM;
>>>>>>>>>>> +
>>>>>>>>>>> data->bytes_xfered = 0;
>>>>>>>>>>> if (data->flags & MMC_DATA_WRITE)
>>>>>>>>>>> cmd_cfg |= CMD_CFG_DATA_WR;
>>>>>>>>>>> @@ -533,7 +560,7 @@ static void meson_mmc_start_cmd(struct mmc_host
>>>>>>>>>>> *mmc, struct mmc_command *cmd)
>>>>>>>>>>> desc[i].cmd_cfg |= CMD_CFG_NO_CMD;
>>>>>>>>>>> desc[i].cmd_arg = cmd->arg;
>>>>>>>>>>> desc[i].cmd_resp = 0;
>>>>>>>>>>> - desc[i].cmd_data = sg_dma_address(sg);
>>>>>>>>>>> + desc[i].cmd_data = small_read ? 0 : sg_dma_address(sg);
>>>>>>>>>>> }
>>>>>>>>>>> desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN;
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Hallo Heiner,
>>>>>>>>>>
>>>>>>>>>> here is the result:
>>>>>>>>>> [ 44.375027] brcmfmac: brcmf_sdiod_request_data rw=0, func=1,
>>>>>>>>>> addr=0x08000, nbytes=4
>>>>>>>>>> [ 44.375034] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [ 44.375037] mmc0: blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [ 44.375047] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [ 44.375050] mmc0: 4 bytes transferred: 0
>>>>>>>>>> [ 44.375057] brcmfmac: brcmf_sdiod_regrl data:0x16044330
>>>>>>>>>> [ 44.375059] brcmfmac: F1 signature read @0x18000000=0x16044330
>>>>>>>>>>
>>>>>>>>>> [ 44.375296] mmc0: starting CMD53 arg 15000004 flags 000001b5
>>>>>>>>>> [ 44.375299] mmc0: blksz 4 blocks 1 flags 00000200 tsac 1000 ms
>>>>>>>>>> nsac 0
>>>>>>>>>> [ 44.375309] mmc0: req done (CMD53): 0: 00001000 00000000 00000000
>>>>>>>>>> 00000000
>>>>>>>>>> [ 44.375311] mmc0: 4 bytes transferred: 0
>>>>>>>>>> [ 44.375323] brcmfmac: brcmf_sdiod_regrl data:0x00000000 <<<
>>>>>>>>>> expected 0x16044330
>>>>>>>>>> [ 44.375327] brcmfmac: brcmf_chip_recognition found SB chip: BCM0,
>>>>>>>>>> rev=0
>>>>>>>>>> [ 44.375330] brcmfmac: brcmf_chip_recognition: SB chip is not
>>>>>>>>>> supported
>>>>>>>>>> [ 44.375333] brcmfmac: brcmf_sdio_probe_attach: brcmf_chip_attach
>>>>>>>>>> failed!
>>>>>>>>>> [ 44.375337] brcmfmac: brcmf_sdio_probe: brcmf_sdio_probe_attach
>>>>>>>>>> failed
>>>>>>>>>> [ 44.375339] brcmfmac: brcmf_sdio_remove Enter
>>>>>>>>>>
>>>>>>>>>> the 1. cmd53 returned the correct data.
>>>>>>>>>> the second one failed. 0x0 instead of 0x16044330 (the same value as
>>>>>>>>>> in the 1. cmd53)
>>>>>>>>>>
>>>>>>>>>> Helmut
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hallo Helmut,
>>>>>>>>>
>>>>>>>>> next attempt .. After some more analysis I suspect a bug in SDIO core
>>>>>>>>> regarding a not
>>>>>>>>> properly aligned buffer (not aligned on 8 byte boundary what is needed
>>>>>>>>> for 64 bit DMA).
>>>>>>>>>
>>>>>>>>> I'd appreciate if you could test attached four patches on top of
>>>>>>>>> latest next kernel.
>>>>>>>>> Patches 1 + 2: smaller refactorings which have been submitted already
>>>>>>>>> but are not applied yet
>>>>>>>>> Patch 3: Fix for suspected issue in SDIO core
>>>>>>>>> Patch 4: Switch to descriptor chain mode
>>>>>>>>>
>>>>>>>>> By the way, if you go with latest next kernel:
>>>>>>>>> STMMAC ethernet driver is broken currently, I had to go back to
>>>>>>>>> version from March 10th.
>>>>>>>>>
>>>>>>>>> Thanks in advance,
>>>>>>>>> Heiner
>>>>>>>>>
>>>>>>>>
>>>>>>>> Hallo Heiner,
>>>>>>>>
>>>>>>>> i've applied the 4 patches to the current linux-next.
>>>>>>>>
>>>>>>>> and
>>>>>>>>
>>>>>>>> i think, you did it!
>>>>>>>>
>>>>>>>> The adapter type is now detected und the firmware download succeeds.
>>>>>>>>
>>>>>>>> wlan0 gets an ip-address via dhcp.
>>>>>>>>
>>>>>>>> but: linux-next itself seems to have a problem with networking. even
>>>>>>>> without having loaded
>>>>>>>> meson-gx-mmc and brcmfmac the ethernet communication crashes.
>>>>>>>> so i cannot do any further tests.
>>>>>>>>
>>>>>>>> the performance of mmc (28.7 MBytes/s) and sd-card (22.5 MBytes/s) is
>>>>>>>> much better then with to old driver (none sg-list)
>>>>>>>>
>>>>>>>> i applied patch #3 to linux-amlogic and copied meson-gx-mmc.c from
>>>>>>>> linux-next. But failed to compile it
>>>>>>>>
>>>>>>>> drivers/mmc/host/meson-gx-mmc.c: In function ‘meson_mmc_pre_req’:
>>>>>>>> drivers/mmc/host/meson-gx-mmc.c:199:9: error: implicit declaration of
>>>>>>>> function ‘mmc_get_dma_dir’ [-Werror=implicit-function-declaration]
>>>>>>>> mmc_get_dma_dir(data));
>>>>>>>> ^
>>>>>>>> ./include/linux/dma-mapping.h:410:58: note: in definition of macro
>>>>>>>> ‘dma_map_sg’
>>>>>>>> #define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
>>>>>>>>
>>>>>>>> Helmut
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> Hallo Heiner,
>>>>>>>
>>>>>>> this evening i made some tests with linux-next. in the current version (2017-04-03)
>>>>>>> your first two patches are already included. so i had to appl only 3 and 4.
>>>>>>>
>>>>>>> tcp with the ethernet adpater is ok.
>>>>>>>
>>>>>>> but with the wlan i get warnings
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461366] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461368] Modules linked in: brcmfmac cfg80211 brcmutil ir_nec_decoder meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461390] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #6
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461391] Hardware name: Netxeon MiniMX (DT)
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461491] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461494] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461498] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461502] LR is at meson_mmc_request+0x4c/0x98
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461504] pc : [<ffffff80083932d0>] lr : [<ffffff800839346c>] pstate: 20000145
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461505] sp : ffffffc01027b920
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461507] x29: ffffffc01027b920 x28: 000000000000005c
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461510] x27: 0000000000000001 x26: ffffffc072540ce0
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461514] x25: ffffffc074348000 x24: ffffffc01027bab0
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461518] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461521] x21: ffffffc01027baf0 x20: ffffffc074348500
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461524] x19: 0000000000000000 x18: 0000000000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461528] x17: 0000000000000000 x16: 0000000000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461531] x15: ffffffc076f8ac80 x14: 0000000000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461534] x13: 0000000000000000 x12: 0000000000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461537] x11: 0000000000000000 x10: ffffff800053e508
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461541] x9 : ffffffc01027bb98 x8 : ffffffc01027bab0
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461544] x7 : 0000000000000000 x6 : 0000000000000001
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461548] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461551] x3 : 000000000000003f x2 : ffffffc01027ba90
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461554] x1 : 0000000000000004 x0 : 000000000000005c
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461558] ---[ end trace f9fa3cc8e4194a72 ]---
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461560] Call trace:
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461564] Exception stack(0xffffffc01027b750 to 0xffffffc01027b880)
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461566] b740: 0000000000000000 0000008000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461570] b760: ffffffc01027b920 ffffff80083932d0 ffffff8008648000 ffffffc076f8ac80
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461573] b780: ffffffc010252600 ffffffc01027b848 ffffffc01027b7d0 ffffff80080c14b4
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461576] b7a0: ffffffc076f8ac80 ffffffc076f8ac80 ffffffc01027b7d0 ffffff8008084a3c
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461579] b7c0: ffffffc01027b7f0 ffffff800844b59c ffffff800864cb80 ffffffc076f8ac80
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461582] b7e0: ffffffc010252600 ffffffc0743fc000 000000000000005c 0000000000000004
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461585] b800: ffffffc01027ba90 000000000000003f 0000000000000000 00000000ffffffff
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461589] b820: 0000000000000001 0000000000000000 ffffffc01027bab0 ffffffc01027bb98
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461592] b840: ffffff800053e508 0000000000000000 0000000000000000 0000000000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461595] b860: 0000000000000000 ffffffc076f8ac80 0000000000000000 0000000000000000
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461598] [<ffffff80083932d0>] meson_mmc_start_cmd+0x1c8/0x318
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461601] [<ffffff800839346c>] meson_mmc_request+0x4c/0x98
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461606] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461609] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461612] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461617] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461621] [<ffffff800838c470>] sdio_io_rw_ext_helper+0xb8/0x1e8
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461625] [<ffffff800838c6b8>] sdio_memcpy_toio+0x20/0x28
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461704] [<ffffff800052dbb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461781] [<ffffff800052f000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461857] [<ffffff800052a968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461863] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461866] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461871] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>>>> Nov 3 18:18:51 localhost kernel: [ 134.461875] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>>>>
>>>>>>> it seems that not every sg buffer is 64 bit aligned.
>>>>>>> detection of the wlan adapter, firmware download and dhcp are always successful. just as ping (up to frame sizes of 1500 bytes)
>>>>>>> i have the feeling, that only tcp packets trigger the warning
>>>>>>>
>>>>>>> Helmut
>>>>>>>
>>>>>>
>>>>>> Hallo Helmut,
>>>>>>
>>>>>> I'd like to understand better whether the unaligned buffer originates in the WiFi driver or in the SDIO core.
>>>>>> I'd appreciate if you could apply the following on top. It should print some (hopefully) helpful info
>>>>>> before the WARN_ON trace.
>>>>>>
>>>>>> Thanks, Heiner
>>>>>>
>>>>>> diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
>>>>>> index d40744bb..15cf9820 100644
>>>>>> --- a/drivers/mmc/core/sdio_io.c
>>>>>> +++ b/drivers/mmc/core/sdio_io.c
>>>>>> @@ -14,6 +14,7 @@
>>>>>> #include <linux/mmc/card.h>
>>>>>> #include <linux/mmc/sdio.h>
>>>>>> #include <linux/mmc/sdio_func.h>
>>>>>> +#include <linux/mm.h>
>>>>>>
>>>>>> #include "sdio_ops.h"
>>>>>> #include "core.h"
>>>>>> @@ -308,10 +309,18 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>> unsigned remainder = size;
>>>>>> unsigned max_blocks;
>>>>>> int ret;
>>>>>> + void *buf_orig = buf;
>>>>>> + unsigned size_orig = size;
>>>>>>
>>>>>> if (!func || (func->num > 7))
>>>>>> return -EINVAL;
>>>>>>
>>>>>> + if (is_vmalloc_addr(buf))
>>>>>> + pr_err("sdio: buffer is vmalloc memory\n");
>>>>>> +
>>>>>> + if (((unsigned long)buf) & 7)
>>>>>> + pr_err("sdio: buffer %p is not aligned\n", buf);
>>>>>> +
>>>>>> /* Do the bulk of the transfer using block mode (if supported). */
>>>>>> if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
>>>>>> /* Blocks per command is limited by host count, host transfer
>>>>>> @@ -326,6 +335,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>> blocks = max_blocks;
>>>>>> size = blocks * func->cur_blksize;
>>>>>>
>>>>>> + if (((unsigned long)buf) & 7)
>>>>>> + pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u\n",
>>>>>> + buf_orig, size_orig, buf, blocks, func->cur_blksize);
>>>>>> +
>>>>>> ret = mmc_io_rw_extended(func->card, write,
>>>>>> func->num, addr, incr_addr, buf,
>>>>>> blocks, func->cur_blksize);
>>>>>> @@ -343,6 +356,10 @@ static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
>>>>>> while (remainder > 0) {
>>>>>> size = min(remainder, sdio_max_byte_size(func));
>>>>>>
>>>>>> + if (((unsigned long)buf) & 7)
>>>>>> + pr_err("sdio: buf_orig: %p size_orig: %u buf: %p blocks: %u size: %u blksz: %u\n",
>>>>>> + buf_orig, size_orig, buf, 0, size, func->cur_blksize);
>>>>>> +
>>>>>> /* Indicate byte mode by setting "blocks" = 0 */
>>>>>> ret = mmc_io_rw_extended(func->card, write, func->num, addr,
>>>>>> incr_addr, buf, 0, size);
>>>>>>
>>>>>
>>>>> Hallo Heiner,
>>>>>
>>>>> this is the ouput
>>>>> [ 58.509474] sdio: buffer ffffffc073c4448c is not aligned
>>>>> [ 58.509506] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>> [ 58.519115] ------------[ cut here ]------------
>>>>> [ 58.519130] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> [ 58.519132] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil meson_rng rng_core meson_gxbb_wdt evdev meson_ir rc_core
>>>>> [ 58.519153] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>> [ 58.519154] Hardware name: Netxeon MiniMX (DT)
>>>>> [ 58.519258] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> [ 58.519269] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> [ 58.519276] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> [ 58.519280] LR is at meson_mmc_request+0x4c/0x98
>>>>> [ 58.519282] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>> [ 58.519283] sp : ffffffc01027b910
>>>>> [ 58.519285] x29: ffffffc01027b910 x28: 0000000000008000
>>>>> [ 58.519288] x27: ffffffc073c444e0 x26: 0000000000000054
>>>>> [ 58.519292] x25: ffffffc0742fd800 x24: ffffffc01027baa0
>>>>> [ 58.519295] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> [ 58.519298] x21: ffffffc01027bae0 x20: ffffffc0742fdd00
>>>>> [ 58.519302] x19: 0000000000000000 x18: 0000000000000006
>>>>> [ 58.519306] x17: 0000000000000000 x16: 0000000000000000
>>>>> [ 58.519309] x15: ffffff80086f373d x14: 3463333730636666
>>>>> [ 58.519313] x13: 66666666203a6675 x12: 62203438203a6769
>>>>> [ 58.519316] x11: 726f5f657a697320 x10: ffffff80082d56b0
>>>>> [ 58.519337] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>> [ 58.519350] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> [ 58.519354] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> [ 58.519357] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>> [ 58.519360] x1 : 0000000000000004 x0 : 0000000000000054
>>>>> [ 58.519364] ---[ end trace 22523b85322e1fa4 ]---
>>>>> [ 58.519366] Call trace:
>>>>> [ 58.519370] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>> [ 58.519374] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>> [ 58.519377] b760: ffffff80086f373d ffffffc01027b880 ffffffc01027b780 ffffff8008573945
>>>>> [ 58.519380] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>> [ 58.519383] b7a0: ffffff80086b7a60 ffffff80086f3730 0000000000000062 ffffff80086b7a60
>>>>> [ 58.519386] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>> [ 58.519389] b7e0: 0000000000000054 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>> [ 58.519392] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>> [ 58.519395] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 726f5f657a697320
>>>>> [ 58.519398] b840: 62203438203a6769 66666666203a6675 3463333730636666 ffffff80086f373d
>>>>> [ 58.519401] b860: 0000000000000000 0000000000000000
>>>>> [ 58.519410] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> [ 58.519419] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>> [ 58.519428] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> [ 58.519436] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> [ 58.519443] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> [ 58.519451] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> [ 58.519458] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>> [ 58.519464] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>> [ 58.519552] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> [ 58.519633] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> [ 58.519715] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> [ 58.519723] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> [ 58.519728] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> [ 58.519733] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> [ 58.519737] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>> [ 59.517967] sdio: buffer ffffffc073c4448c is not aligned
>>>>> [ 59.517999] sdio: buf_orig: ffffffc073c4448c size_orig: 84 buf: ffffffc073c4448c blocks: 0 size: 84 blksz: 512
>>>>>
>>>>>
>>>>> [ 242.577369] sdio: buffer ffffffc0727bc484 is not aligned
>>>>> [ 242.577400] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>> [ 242.586996] ------------[ cut here ]------------
>>>>> [ 242.587010] WARNING: CPU: 0 PID: 5 at drivers/mmc/host/meson-gx-mmc.c:536 meson_mmc_start_cmd+0x1c8/0x318
>>>>> [ 242.587012] Modules linked in: brcmfmac cfg80211 ir_nec_decoder brcmutil evdev meson_rng rng_core meson_gxbb_wdt meson_ir rc_core
>>>>> [ 242.587035] CPU: 0 PID: 5 Comm: kworker/u8:0 Not tainted 4.11.0-rc5-next-20170403+ #7
>>>>> [ 242.587036] Hardware name: Netxeon MiniMX (DT)
>>>>> [ 242.587139] Workqueue: brcmf_wq/mmc1:0001:1 brcmf_sdio_dataworker [brcmfmac]
>>>>> [ 242.587151] task: ffffffc010252600 task.stack: ffffffc010278000
>>>>> [ 242.587159] PC is at meson_mmc_start_cmd+0x1c8/0x318
>>>>> [ 242.587162] LR is at meson_mmc_request+0x4c/0x98
>>>>> [ 242.587164] pc : [<ffffff8008393390>] lr : [<ffffff800839352c>] pstate: 20000145
>>>>> [ 242.587166] sp : ffffffc01027b910
>>>>> [ 242.587167] x29: ffffffc01027b910 x28: 0000000000008000
>>>>> [ 242.587171] x27: ffffffc0727bc4e0 x26: 000000000000005c
>>>>> [ 242.587174] x25: ffffffc0742e5000 x24: ffffffc01027baa0
>>>>> [ 242.587177] x23: ffffff800873d000 x22: 00000000b54ca000
>>>>> [ 242.587189] x21: ffffffc01027bae0 x20: ffffffc0742e5500
>>>>> [ 242.587197] x19: 0000000000000000 x18: 0000000000000006
>>>>> [ 242.587200] x17: 0000000000000000 x16: 0000000000000000
>>>>> [ 242.587208] x15: ffffff80086f373d x14: 3438346362373237
>>>>> [ 242.587211] x13: 3063666666666666 x12: 203a667562203239
>>>>> [ 242.587215] x11: 203a6769726f5f65 x10: ffffff80082d56b0
>>>>> [ 242.587218] x9 : ffffffc01027bb88 x8 : ffffffc01027baa0
>>>>> [ 242.587231] x7 : 0000000000000000 x6 : 0000000000000001
>>>>> [ 242.587236] x5 : 00000000ffffffff x4 : 0000000000000000
>>>>> [ 242.587239] x3 : 000000000000003f x2 : ffffffc01027ba80
>>>>> [ 242.587242] x1 : 0000000000000004 x0 : 000000000000005c
>>>>> [ 242.587246] ---[ end trace 7831fd15034513ca ]---
>>>>> [ 242.587249] Call trace:
>>>>> [ 242.587252] Exception stack(0xffffffc01027b740 to 0xffffffc01027b870)
>>>>> [ 242.587257] b740: 0000000000000000 0000008000000000 ffffffc01027b910 ffffff8008393390
>>>>> [ 242.587265] b760: ffffff80086f373d ffffffc01027b880 ffffffc010252600 ffffff8008573945
>>>>> [ 242.587271] b780: ffffffc01027b800 ffffff8008273b38 0000000000000000 ffffff80086f3730
>>>>> [ 242.587276] b7a0: ffffff80086b7b5c ffffff80086f3730 0000000000000062 ffffff80086b7b5c
>>>>> [ 242.587279] b7c0: 0000000000000000 0000000000000001 0000000000000400 0000000000000000
>>>>> [ 242.587282] b7e0: 000000000000005c 0000000000000004 ffffffc01027ba80 000000000000003f
>>>>> [ 242.587284] b800: 0000000000000000 00000000ffffffff 0000000000000001 0000000000000000
>>>>> [ 242.587288] b820: ffffffc01027baa0 ffffffc01027bb88 ffffff80082d56b0 203a6769726f5f65
>>>>> [ 242.587291] b840: 203a667562203239 3063666666666666 3438346362373237 ffffff80086f373d
>>>>> [ 242.587293] b860: 0000000000000000 0000000000000000
>>>>> [ 242.587296] [<ffffff8008393390>] meson_mmc_start_cmd+0x1c8/0x318
>>>>> [ 242.587299] [<ffffff800839352c>] meson_mmc_request+0x4c/0x98
>>>>> [ 242.587306] [<ffffff800837e540>] __mmc_start_request+0x50/0xf8
>>>>> [ 242.587310] [<ffffff800837e6e0>] mmc_start_request+0xf8/0x230
>>>>> [ 242.587313] [<ffffff800837efb4>] mmc_wait_for_req+0x8c/0x100
>>>>> [ 242.587318] [<ffffff800838acd0>] mmc_io_rw_extended+0x268/0x290
>>>>> [ 242.587322] [<ffffff800838c558>] sdio_io_rw_ext_helper+0x1a0/0x2a8
>>>>> [ 242.587325] [<ffffff800838c778>] sdio_memcpy_toio+0x20/0x28
>>>>> [ 242.587416] [<ffffff8000594bb8>] brcmf_sdiod_buffrw.isra.4+0x68/0xa8 [brcmfmac]
>>>>> [ 242.587498] [<ffffff8000596000>] brcmf_sdiod_send_pkt+0xb8/0x108 [brcmfmac]
>>>>> [ 242.587585] [<ffffff8000591968>] brcmf_sdio_dataworker+0x600/0x2298 [brcmfmac]
>>>>> [ 242.587597] [<ffffff80080b0478>] process_one_work+0x120/0x338
>>>>> [ 242.587607] [<ffffff80080b06e0>] worker_thread+0x50/0x440
>>>>> [ 242.587617] [<ffffff80080b628c>] kthread+0xfc/0x128
>>>>> [ 242.587625] [<ffffff80080826c0>] ret_from_fork+0x10/0x50
>>>>> [ 243.584080] sdio: buffer ffffffc0727bc484 is not aligned
>>>>> [ 243.584110] sdio: buf_orig: ffffffc0727bc484 size_orig: 92 buf: ffffffc0727bc484 blocks: 0 size: 92 blksz: 512
>>>>>
>>>>> i haven't seen any lines with blocks != 0 or "sdio: buffer is vmalloc memory"
>>>>>
>>>>> i can do udp based data transfers (iperf -s -u) without warning. doing the same with tcp (iperf -s) crashes the wlan interfaces.
>>>>>
>>>>> Helmut
>>>>>
>>>>>
>>>> Thanks, Helmut. At least it's clear now that a not-8-byte-aligned buffer is provided from WiFi driver to SDIO core already.
>>>> In the MMC mailig list archive I found some (so far w/o result) discussions regarding SDIO and DMA.
>>>> Issue seems to be that buffers provided to SDIO core are used for DMA, but SDIO API doesn't enforce provided buffers
>>>> to be DMA-safe.
>>>> We can't change all SDIO device drivers, so we have to spend y few more thoughts on how to deal with this in SDIO core
>>>> and / or MMC controller drivers.
>>>>
>>>> Heiner
>>>>
>>>>
>>> Hallo Heiner,
>>>
>>> i found a solution:
>>>
>>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> index a999f95062c7..b966217f3a6c 100644
>>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>> @@ -540,7 +540,7 @@ static int qcount[NUMPRIO];
>>> /* Limit on rounding up frames */
>>> static const uint max_roundup = 512;
>>>
>>> -#define ALIGNMENT 4
>>> +#define ALIGNMENT 8
>>>
>>> enum brcmf_sdio_frmtype {
>>> BRCMF_SDIO_FT_NORMAL,
>>
>> Hi Heiner,
>>
>> Isn't a way to use the old behaviour with a badly aligned buffer ?
>>
>> Neil
>>
>>
>
> "a solution" was a bad expression.
>
> with my mail i wanted to show, that
> - Heiners drivers is, when receiving correctly aligned buffers, perfectly operational
> - the performance isn't better than that of the amlogic driver, which uses, as much as i can see, a bounce buffer for sdio
>
In the case of SDIO I would assume that usually the device is the limiting factor, not the controller driver.
For eMMC this may be different.
> and what was surprising for me:
> - the code for the buffer aligment inside of brcmfmac uses a locally defined value. isn't there a global definition for this??
> - handling for buffer alignment seems IMHO inconsistent in the kernel
>
This is my impression too. There's not really a consistent way to say in an API: This pointer must not reference
non-DMA'able memory. AFAIK not even a weak option similar to the __iomem annotation is available.
> Helmut
>
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