include/linux/mmc/core.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  linux/include/linux/mmc/core.h
   4  */
   5 #ifndef LINUX_MMC_CORE_H
   6 #define LINUX_MMC_CORE_H
   7
   8 #include <linux/completion.h>
   9 #include <linux/types.h>
  10
  11 struct mmc_data;
  12 struct mmc_request;
  13
  14 #define UHS2_MAX_PAYLOAD_LEN 2
  15 #define UHS2_MAX_RESP_LEN 20
  16
  17 struct uhs2_command {
  18         u16     header;
  19         u16     arg;
  20         __be32  payload[UHS2_MAX_PAYLOAD_LEN];
  21         u8      payload_len;
  22         u8      packet_len;
  23         u8      tmode_half_duplex;
  24         u8      uhs2_resp[UHS2_MAX_RESP_LEN];   /* UHS2 native cmd resp */
  25         u8      uhs2_resp_len;                  /* UHS2 native cmd resp len */
  26 };
  27
  28 struct mmc_command {
  29         u32                     opcode;
  30         u32                     arg;
  31 #define MMC_CMD23_ARG_REL_WR    (1 << 31)
  32 #define MMC_CMD23_ARG_TAG_REQ   (1 << 29)
  33         u32                     resp[4];
  34         unsigned int            flags;          /* expected response type */
  35 #define MMC_RSP_PRESENT (1 << 0)
  36 #define MMC_RSP_136     (1 << 1)                /* 136 bit response */
  37 #define MMC_RSP_CRC     (1 << 2)                /* expect valid crc */
  38 #define MMC_RSP_BUSY    (1 << 3)                /* card may send busy */
  39 #define MMC_RSP_OPCODE  (1 << 4)                /* response contains opcode */
  40
  41 #define MMC_CMD_MASK    (3 << 5)                /* non-SPI command type */
  42 #define MMC_CMD_AC      (0 << 5)
  43 #define MMC_CMD_ADTC    (1 << 5)
  44 #define MMC_CMD_BC      (2 << 5)
  45 #define MMC_CMD_BCR     (3 << 5)
  46
  47 #define MMC_RSP_SPI_S1  (1 << 7)                /* one status byte */
  48 #define MMC_RSP_SPI_S2  (1 << 8)                /* second byte */
  49 #define MMC_RSP_SPI_B4  (1 << 9)                /* four data bytes */
  50 #define MMC_RSP_SPI_BUSY (1 << 10)              /* card may send busy */
  51
  52 /*
  53  * These are the native response types, and correspond to valid bit
  54  * patterns of the above flags.  One additional valid pattern
  55  * is all zeros, which means we don't expect a response.
  56  */
  57 #define MMC_RSP_NONE    (0)
  58 #define MMC_RSP_R1      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  59 #define MMC_RSP_R1B     (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
  60 #define MMC_RSP_R2      (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
  61 #define MMC_RSP_R3      (MMC_RSP_PRESENT)
  62 #define MMC_RSP_R4      (MMC_RSP_PRESENT)
  63 #define MMC_RSP_R5      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  64 #define MMC_RSP_R6      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  65 #define MMC_RSP_R7      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
  66
  67 /* Can be used by core to poll after switch to MMC HS mode */
  68 #define MMC_RSP_R1_NO_CRC       (MMC_RSP_PRESENT|MMC_RSP_OPCODE)
  69
  70 #define mmc_resp_type(cmd)      ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
  71
  72 /*
  73  * These are the SPI response types for MMC, SD, and SDIO cards.
  74  * Commands return R1, with maybe more info.  Zero is an error type;
  75  * callers must always provide the appropriate MMC_RSP_SPI_Rx flags.
  76  */
  77 #define MMC_RSP_SPI_R1  (MMC_RSP_SPI_S1)
  78 #define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY)
  79 #define MMC_RSP_SPI_R2  (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
  80 #define MMC_RSP_SPI_R3  (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  81 #define MMC_RSP_SPI_R4  (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  82 #define MMC_RSP_SPI_R5  (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
  83 #define MMC_RSP_SPI_R7  (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
  84
  85 #define mmc_spi_resp_type(cmd)  ((cmd)->flags & \
  86                 (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4))
  87
  88 /*
  89  * These are the command types.
  90  */
  91 #define mmc_cmd_type(cmd)       ((cmd)->flags & MMC_CMD_MASK)
  92
  93         unsigned int            retries;        /* max number of retries */
  94         int                     error;          /* command error */
  95
  96 /*
  97  * Standard errno values are used for errors, but some have specific
  98  * meaning in the MMC layer:
  99  *
 100  * ETIMEDOUT    Card took too long to respond
 101  * EILSEQ       Basic format problem with the received or sent data
 102  *              (e.g. CRC check failed, incorrect opcode in response
 103  *              or bad end bit)
 104  * EINVAL       Request cannot be performed because of restrictions
 105  *              in hardware and/or the driver
 106  * ENOMEDIUM    Host can determine that the slot is empty and is
 107  *              actively failing requests
 108  */
 109
 110         unsigned int            busy_timeout;   /* busy detect timeout in ms */
 111         struct mmc_data         *data;          /* data segment associated with cmd */
 112         struct mmc_request      *mrq;           /* associated request */
 113
 114         struct uhs2_command     *uhs2_cmd;      /* UHS2 command */
 115
 116         /* for SDUC */
 117         bool has_ext_addr;
 118         u8 ext_addr;
 119 };
 120
 121 struct mmc_data {
 122         unsigned int            timeout_ns;     /* data timeout (in ns, max 80ms) */
 123         unsigned int            timeout_clks;   /* data timeout (in clocks) */
 124         unsigned int            blksz;          /* data block size */
 125         unsigned int            blocks;         /* number of blocks */
 126         unsigned int            blk_addr;       /* block address */
 127         int                     error;          /* data error */
 128         unsigned int            flags;
 129
 130 #define MMC_DATA_WRITE          BIT(8)
 131 #define MMC_DATA_READ           BIT(9)
 132 /* Extra flags used by CQE */
 133 #define MMC_DATA_QBR            BIT(10)         /* CQE queue barrier*/
 134 #define MMC_DATA_PRIO           BIT(11)         /* CQE high priority */
 135 #define MMC_DATA_REL_WR         BIT(12)         /* Reliable write */
 136 #define MMC_DATA_DAT_TAG        BIT(13)         /* Tag request */
 137 #define MMC_DATA_FORCED_PRG     BIT(14)         /* Forced programming */
 138
 139         unsigned int            bytes_xfered;
 140
 141         struct mmc_command      *stop;          /* stop command */
 142         struct mmc_request      *mrq;           /* associated request */
 143
 144         unsigned int            sg_len;         /* size of scatter list */
 145         int                     sg_count;       /* mapped sg entries */
 146         struct scatterlist      *sg;            /* I/O scatter list */
 147         s32                     host_cookie;    /* host private data */
 148 };
 149
 150 struct mmc_host;
 151 struct mmc_request {
 152         struct mmc_command      *sbc;           /* SET_BLOCK_COUNT for multiblock */
 153         struct mmc_command      *cmd;
 154         struct mmc_data         *data;
 155         struct mmc_command      *stop;
 156
 157         struct completion       completion;
 158         struct completion       cmd_completion;
 159         void                    (*done)(struct mmc_request *);/* completion function */
 160         /*
 161          * Notify uppers layers (e.g. mmc block driver) that recovery is needed
 162          * due to an error associated with the mmc_request. Currently used only
 163          * by CQE.
 164          */
 165         void                    (*recovery_notifier)(struct mmc_request *);
 166         struct mmc_host         *host;
 167
 168         /* Allow other commands during this ongoing data transfer or busy wait */
 169         bool                    cap_cmd_during_tfr;
 170
 171         int                     tag;
 172
 173 #ifdef CONFIG_MMC_CRYPTO
 174         const struct bio_crypt_ctx *crypto_ctx;
 175         int                     crypto_key_slot;
 176 #endif
 177         struct uhs2_command     uhs2_cmd;
 178 };
 179
 180 struct mmc_card;
 181
 182 void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq);
 183 int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd,
 184                 int retries);
 185
 186 int mmc_hw_reset(struct mmc_card *card);
 187 int mmc_sw_reset(struct mmc_card *card);
 188 void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card);
 189
 190 #endif /* LINUX_MMC_CORE_H */