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Sat, 23 Nov 2024 00:10:34 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by MTKMBS14N2.mediatek.inc (172.21.101.76) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Sat, 23 Nov 2024 15:10:30 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Sat, 23 Nov 2024 15:10:30 +0800 From: Andy-ld Lu To: , , , CC: , , , , Andy-ld Lu Subject: [PATCH] mmc: mtk-sd: Add support for ignoring cmd response CRC Date: Sat, 23 Nov 2024 15:09:05 +0800 Message-ID: <20241123071006.14294-1-andy-ld.lu@mediatek.com> X-Mailer: git-send-email 2.46.0 MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--6.109900-8.000000 X-TMASE-MatchedRID: Q3t+gDEGl+H7W7/9wscjdRuZoNKc6pl+ju+GX08gELBKda7Cp9A+Rm7T iYn7+ZHjXers26Xj0FAkAzbREWz9m28aeniRmKw1H5YQyOg71ZZMkOX0UoduuQqiCYa6w8tv8rK /0wUyv6DwLx34aly34aojHM/WIuK90rly6TajiUnuykw7cfAoIHE01tKb2rARmyiLZetSf8mfop 0ytGwvXiq2rl3dzGQ1HN3C0owwdL7VUQqweXw1HiKsnV6jwqhAS8V3+ghPHP094nqACUbvaA== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--6.109900-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: D2E444064FAB0EB55E14C3A892E9AA8715E06345789FCC8F6A380B8EA7050E592000:8 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241122_231038_563435_96B7CBB0 X-CRM114-Status: GOOD ( 14.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The current process flow does not handle MMC requests that are indicated to ignore the command response CRC. For instance, cmd12 and cmd48 from mmc_cqe_recovery() are marked to ignore CRC, but they are not matched to the appropriate response type in msdc_cmd_find_resp(). As a result, they are defaulted to 'MMC_RSP_NONE', which means no response is expected. This commit adds a new flag 'MMC_RSP_R1B_NO_CRC' to work alongside the existing 'MMC_RSP_R1_NO_CRC' for the following process flow. It fixes the response type setting in msdc_cmd_find_resp() and adds the logic to ignore CRC in msdc_cmd_done(). Signed-off-by: Andy-ld Lu Reviewed-by: AngeloGioacchino Del Regno --- drivers/mmc/host/mtk-sd.c | 11 +++++++++-- include/linux/mmc/core.h | 1 + 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index efb0d2d5716b..5d669f985a82 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -1097,11 +1097,13 @@ static inline u32 msdc_cmd_find_resp(struct msdc_host *host, u32 resp; switch (mmc_resp_type(cmd)) { - /* Actually, R1, R5, R6, R7 are the same */ + /* Actually, R1, R5, R6, R7 are the same */ case MMC_RSP_R1: + case MMC_RSP_R1_NO_CRC: resp = 0x1; break; case MMC_RSP_R1B: + case MMC_RSP_R1B_NO_CRC: resp = 0x7; break; case MMC_RSP_R2: @@ -1305,6 +1307,7 @@ static bool msdc_cmd_done(struct msdc_host *host, int events, { bool done = false; bool sbc_error; + bool ignore_crc = false; unsigned long flags; u32 *rsp; @@ -1329,6 +1332,10 @@ static bool msdc_cmd_done(struct msdc_host *host, int events, return true; rsp = cmd->resp; + if (mmc_resp_type(cmd) == MMC_RSP_R1_NO_CRC || + mmc_resp_type(cmd) == MMC_RSP_R1B_NO_CRC) + ignore_crc = true; + sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask); if (cmd->flags & MMC_RSP_PRESENT) { @@ -1351,7 +1358,7 @@ static bool msdc_cmd_done(struct msdc_host *host, int events, * CRC error. */ msdc_reset_hw(host); - if (events & MSDC_INT_RSPCRCERR) { + if (events & MSDC_INT_RSPCRCERR && !ignore_crc) { cmd->error = -EILSEQ; host->error |= REQ_CMD_EIO; } else if (events & MSDC_INT_CMDTMO) { diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 56972bd78462..076e1c71a07e 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -66,6 +66,7 @@ struct mmc_command { /* Can be used by core to poll after switch to MMC HS mode */ #define MMC_RSP_R1_NO_CRC (MMC_RSP_PRESENT|MMC_RSP_OPCODE) +#define MMC_RSP_R1B_NO_CRC (MMC_RSP_PRESENT|MMC_RSP_OPCODE|MMC_RSP_BUSY) #define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))