[SCSI] qla2xxx: T10 DIF support added.

Signed-off-by: Duane Grigsby <duane.grigsby@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 82 insertions, 2 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 0d2cecbb8f47..4559f5c6c1ae 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -189,6 +189,16 @@
 struct req_que;
 
 /*
+ * (sd.h is not exported, hence local inclusion)
+ * Data Integrity Field tuple.
+ */
+struct sd_dif_tuple {
+        __be16 guard_tag;       /* Checksum */
+        __be16 app_tag;         /* Opaque storage */
+        __be32 ref_tag;         /* Target LBA or indirect LBA */
+};
+
+/*
  * SCSI Request Block
  */
 typedef struct srb {
@@ -208,8 +218,14 @@ typedef struct srb {
 /*
  * SRB flag definitions
  */
-#define SRB_DMA_VALID           BIT_0   /* Command sent to ISP */
-#define SRB_FCP_CMND_DMA_VALID  BIT_12  /* FCP command in IOCB */
+#define SRB_DMA_VALID                   BIT_0   /* Command sent to ISP */
+#define SRB_FCP_CMND_DMA_VALID          BIT_12  /* DIF: DSD List valid */
+#define SRB_CRC_CTX_DMA_VALID           BIT_2   /* DIF: context DMA valid */
+#define SRB_CRC_PROT_DMA_VALID          BIT_4   /* DIF: prot DMA valid */
+#define SRB_CRC_CTX_DSD_VALID           BIT_5   /* DIF: dsd_list valid */
+
+/* To identify if a srb is of T10-CRC type. @sp => srb_t pointer */
+#define IS_PROT_IO(sp)  (sp->flags & SRB_CRC_CTX_DSD_VALID)
 
 /*
  * SRB extensions.
@@ -1330,6 +1346,66 @@ typedef struct {
         uint32_t dseg_4_length;         /* Data segment 4 length. */
 } cont_a64_entry_t;
 
+#define PO_MODE_DIF_INSERT      0
+#define PO_MODE_DIF_REMOVE      BIT_0
+#define PO_MODE_DIF_PASS        BIT_1
+#define PO_MODE_DIF_REPLACE     (BIT_0 + BIT_1)
+#define PO_ENABLE_DIF_BUNDLING  BIT_8
+#define PO_ENABLE_INCR_GUARD_SEED       BIT_3
+#define PO_DISABLE_INCR_REF_TAG BIT_5
+#define PO_DISABLE_GUARD_CHECK  BIT_4
+/*
+ * ISP queue - 64-Bit addressing, continuation crc entry structure definition.
+ */
+struct crc_context {
+        uint32_t handle;                /* System handle. */
+        uint32_t ref_tag;
+        uint16_t app_tag;
+        uint8_t ref_tag_mask[4];        /* Validation/Replacement Mask*/
+        uint8_t app_tag_mask[2];        /* Validation/Replacement Mask*/
+        uint16_t guard_seed;            /* Initial Guard Seed */
+        uint16_t prot_opts;             /* Requested Data Protection Mode */
+        uint16_t blk_size;              /* Data size in bytes */
+        uint16_t runt_blk_guard;        /* Guard value for runt block (tape
+                                         * only) */
+        uint32_t byte_count;            /* Total byte count/ total data
+                                         * transfer count */
+        union {
+                struct {
+                        uint32_t        reserved_1;
+                        uint16_t        reserved_2;
+                        uint16_t        reserved_3;
+                        uint32_t        reserved_4;
+                        uint32_t        data_address[2];
+                        uint32_t        data_length;
+                        uint32_t        reserved_5[2];
+                        uint32_t        reserved_6;
+                } nobundling;
+                struct {
+                        uint32_t        dif_byte_count; /* Total DIF byte
+                                                         * count */
+                        uint16_t        reserved_1;
+                        uint16_t        dseg_count;     /* Data segment count */
+                        uint32_t        reserved_2;
+                        uint32_t        data_address[2];
+                        uint32_t        data_length;
+                        uint32_t        dif_address[2];
+                        uint32_t        dif_length;     /* Data segment 0
+                                                         * length */
+                } bundling;
+        } u;
+
+        struct fcp_cmnd fcp_cmnd;
+        dma_addr_t      crc_ctx_dma;
+        /* List of DMA context transfers */
+        struct list_head dsd_list;
+
+        /* This structure should not exceed 512 bytes */
+};
+
+#define CRC_CONTEXT_LEN_FW      (offsetof(struct crc_context, fcp_cmnd.lun))
+#define CRC_CONTEXT_FCPCMND_OFF (offsetof(struct crc_context, fcp_cmnd.lun))
+
 /*
  * ISP queue - status entry structure definition.
  */
@@ -1390,6 +1466,7 @@ typedef struct {
 #define CS_ABORTED              0x5     /* System aborted command. */
 #define CS_TIMEOUT              0x6     /* Timeout error. */
 #define CS_DATA_OVERRUN         0x7     /* Data overrun. */
+#define CS_DIF_ERROR            0xC     /* DIF error detected  */
 
 #define CS_DATA_UNDERRUN        0x15    /* Data Underrun. */
 #define CS_QUEUE_FULL           0x1C    /* Queue Full. */
@@ -2732,6 +2809,7 @@ typedef struct scsi_qla_host {
 
                 uint32_t        management_server_logged_in :1;
                 uint32_t        process_response_queue  :1;
+                uint32_t        difdix_supported:1;
         } flags;
 
         atomic_t        loop_state;
@@ -2883,6 +2961,8 @@ typedef struct scsi_qla_host {
 #define OPTROM_BURST_SIZE       0x1000
 #define OPTROM_BURST_DWORDS     (OPTROM_BURST_SIZE / 4)
 
+#define QLA_DSDS_PER_IOCB       37
+
 #include "qla_gbl.h"
 #include "qla_dbg.h"
 #include "qla_inline.h"