meson-gx-mmc: 2nd patch set
Heiner Kallweit
hkallweit1 at gmail.com
Tue Apr 4 23:02:13 PDT 2017
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
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