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[2003:c6:ebdc:4000:783c:aff3:6468:e235]) by smtp.googlemail.com with ESMTPSA id w130sm14587543wmg.0.2017.03.20.12.55.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 20 Mar 2017 12:55:08 -0700 (PDT) Subject: Re: meson-gx-mmc: 2nd patch set To: Helmut Klein References: <2a6d59e0-28db-b65a-835d-512a7e68443e@gmail.com> <9a90bda9-6d12-a368-99ce-67c112249a43@gmail.com> <8383c0cd-f397-78f4-35ea-fa9f0d399e67@gmail.com> <2e91e4e6-bfe1-58a5-8f46-ade8917b01a2@gmail.com> <8a85f2ba-3ce8-c452-2043-7ab0957203e5@gmail.com> <0cf001d6-66df-7a2f-1435-63a662a3a4cd@gmail.com> <82061526-2d16-5710-89a6-afbeecbf0c57@gmail.com> From: Heiner Kallweit Message-ID: <54049145-cd6a-8e14-6011-e1e33f687cf5@gmail.com> Date: Mon, 20 Mar 2017 20:54:54 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <82061526-2d16-5710-89a6-afbeecbf0c57@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170320_125533_366909_4D4925C6 X-CRM114-Status: GOOD ( 14.29 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-amlogic@lists.infradead.org, "linux-mmc@vger.kernel.org" Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+patchwork-linux-amlogic=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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;