[SCSI] lpfc 8.3.27: T10 additions for SLI4

Added T10 DIFF error injection code.
Added T10 DIFF structure definitions for SLI4 devices.
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/lpfc/lpfc.h

@@ -846,8 +846,24 @@ struct lpfc_hba {
 	struct dentry *debug_hbqinfo;
 	struct dentry *debug_dumpHostSlim;
 	struct dentry *debug_dumpHBASlim;
-	struct dentry *debug_dumpData;   /* BlockGuard BPL*/
-	struct dentry *debug_dumpDif;    /* BlockGuard BPL*/
+	struct dentry *debug_dumpData;   /* BlockGuard BPL */
+	struct dentry *debug_dumpDif;    /* BlockGuard BPL */
+	struct dentry *debug_InjErrLBA;  /* LBA to inject errors at */
+	struct dentry *debug_writeGuard; /* inject write guard_tag errors */
+	struct dentry *debug_writeApp;   /* inject write app_tag errors */
+	struct dentry *debug_writeRef;   /* inject write ref_tag errors */
+	struct dentry *debug_readApp;    /* inject read app_tag errors */
+	struct dentry *debug_readRef;    /* inject read ref_tag errors */
+
+	/* T10 DIF error injection */
+	uint32_t lpfc_injerr_wgrd_cnt;
+	uint32_t lpfc_injerr_wapp_cnt;
+	uint32_t lpfc_injerr_wref_cnt;
+	uint32_t lpfc_injerr_rapp_cnt;
+	uint32_t lpfc_injerr_rref_cnt;
+	sector_t lpfc_injerr_lba;
+#define LPFC_INJERR_LBA_OFF	(sector_t)0xffffffffffffffff
+
 	struct dentry *debug_slow_ring_trc;
 	struct lpfc_debugfs_trc *slow_ring_trc;
 	atomic_t slow_ring_trc_cnt;

drivers/scsi/lpfc/lpfc_debugfs.c

@@ -996,6 +996,85 @@ lpfc_debugfs_dumpDataDif_write(struct file *file, const char __user *buf,
 	return nbytes;
 }
 
+static int
+lpfc_debugfs_dif_err_open(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+static ssize_t
+lpfc_debugfs_dif_err_read(struct file *file, char __user *buf,
+	size_t nbytes, loff_t *ppos)
+{
+	struct dentry *dent = file->f_dentry;
+	struct lpfc_hba *phba = file->private_data;
+	char cbuf[16];
+	int cnt = 0;
+
+	if (dent == phba->debug_writeGuard)
+		cnt = snprintf(cbuf, 16, "%u\n", phba->lpfc_injerr_wgrd_cnt);
+	else if (dent == phba->debug_writeApp)
+		cnt = snprintf(cbuf, 16, "%u\n", phba->lpfc_injerr_wapp_cnt);
+	else if (dent == phba->debug_writeRef)
+		cnt = snprintf(cbuf, 16, "%u\n", phba->lpfc_injerr_wref_cnt);
+	else if (dent == phba->debug_readApp)
+		cnt = snprintf(cbuf, 16, "%u\n", phba->lpfc_injerr_rapp_cnt);
+	else if (dent == phba->debug_readRef)
+		cnt = snprintf(cbuf, 16, "%u\n", phba->lpfc_injerr_rref_cnt);
+	else if (dent == phba->debug_InjErrLBA)
+		cnt = snprintf(cbuf, 16, "0x%lx\n",
+				 (unsigned long) phba->lpfc_injerr_lba);
+	else
+		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+			 "0547 Unknown debugfs error injection entry\n");
+
+	return simple_read_from_buffer(buf, nbytes, ppos, &cbuf, cnt);
+}
+
+static ssize_t
+lpfc_debugfs_dif_err_write(struct file *file, const char __user *buf,
+	size_t nbytes, loff_t *ppos)
+{
+	struct dentry *dent = file->f_dentry;
+	struct lpfc_hba *phba = file->private_data;
+	char dstbuf[32];
+	unsigned long tmp;
+	int size;
+
+	memset(dstbuf, 0, 32);
+	size = (nbytes < 32) ? nbytes : 32;
+	if (copy_from_user(dstbuf, buf, size))
+		return 0;
+
+	if (strict_strtoul(dstbuf, 0, &tmp))
+		return 0;
+
+	if (dent == phba->debug_writeGuard)
+		phba->lpfc_injerr_wgrd_cnt = (uint32_t)tmp;
+	else if (dent == phba->debug_writeApp)
+		phba->lpfc_injerr_wapp_cnt = (uint32_t)tmp;
+	else if (dent == phba->debug_writeRef)
+		phba->lpfc_injerr_wref_cnt = (uint32_t)tmp;
+	else if (dent == phba->debug_readApp)
+		phba->lpfc_injerr_rapp_cnt = (uint32_t)tmp;
+	else if (dent == phba->debug_readRef)
+		phba->lpfc_injerr_rref_cnt = (uint32_t)tmp;
+	else if (dent == phba->debug_InjErrLBA)
+		phba->lpfc_injerr_lba = (sector_t)tmp;
+	else
+		lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+			 "0548 Unknown debugfs error injection entry\n");
+
+	return nbytes;
+}
+
+static int
+lpfc_debugfs_dif_err_release(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
 /**
  * lpfc_debugfs_nodelist_open - Open the nodelist debugfs file
  * @inode: The inode pointer that contains a vport pointer.
@@ -3380,6 +3459,16 @@ static const struct file_operations lpfc_debugfs_op_dumpDif = {
 	.release =      lpfc_debugfs_dumpDataDif_release,
 };
 
+#undef lpfc_debugfs_op_dif_err
+static const struct file_operations lpfc_debugfs_op_dif_err = {
+	.owner =	THIS_MODULE,
+	.open =		lpfc_debugfs_dif_err_open,
+	.llseek =	lpfc_debugfs_lseek,
+	.read =		lpfc_debugfs_dif_err_read,
+	.write =	lpfc_debugfs_dif_err_write,
+	.release =	lpfc_debugfs_dif_err_release,
+};
+
 #undef lpfc_debugfs_op_slow_ring_trc
 static const struct file_operations lpfc_debugfs_op_slow_ring_trc = {
 	.owner =        THIS_MODULE,
@@ -3788,6 +3877,74 @@ lpfc_debugfs_initialize(struct lpfc_vport *vport)
 			goto debug_failed;
 		}
 
+		/* Setup DIF Error Injections */
+		snprintf(name, sizeof(name), "InjErrLBA");
+		phba->debug_InjErrLBA =
+			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+			phba->hba_debugfs_root,
+			phba, &lpfc_debugfs_op_dif_err);
+		if (!phba->debug_InjErrLBA) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+				"0807 Cannot create debugfs InjErrLBA\n");
+			goto debug_failed;
+		}
+		phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF;
+
+		snprintf(name, sizeof(name), "writeGuardInjErr");
+		phba->debug_writeGuard =
+			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+			phba->hba_debugfs_root,
+			phba, &lpfc_debugfs_op_dif_err);
+		if (!phba->debug_writeGuard) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+				"0802 Cannot create debugfs writeGuard\n");
+			goto debug_failed;
+		}
+
+		snprintf(name, sizeof(name), "writeAppInjErr");
+		phba->debug_writeApp =
+			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+			phba->hba_debugfs_root,
+			phba, &lpfc_debugfs_op_dif_err);
+		if (!phba->debug_writeApp) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+				"0803 Cannot create debugfs writeApp\n");
+			goto debug_failed;
+		}
+
+		snprintf(name, sizeof(name), "writeRefInjErr");
+		phba->debug_writeRef =
+			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+			phba->hba_debugfs_root,
+			phba, &lpfc_debugfs_op_dif_err);
+		if (!phba->debug_writeRef) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+				"0804 Cannot create debugfs writeRef\n");
+			goto debug_failed;
+		}
+
+		snprintf(name, sizeof(name), "readAppInjErr");
+		phba->debug_readApp =
+			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+			phba->hba_debugfs_root,
+			phba, &lpfc_debugfs_op_dif_err);
+		if (!phba->debug_readApp) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+				"0805 Cannot create debugfs readApp\n");
+			goto debug_failed;
+		}
+
+		snprintf(name, sizeof(name), "readRefInjErr");
+		phba->debug_readRef =
+			debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR,
+			phba->hba_debugfs_root,
+			phba, &lpfc_debugfs_op_dif_err);
+		if (!phba->debug_readRef) {
+			lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT,
+				"0806 Cannot create debugfs readApp\n");
+			goto debug_failed;
+		}
+
 		/* Setup slow ring trace */
 		if (lpfc_debugfs_max_slow_ring_trc) {
 			num = lpfc_debugfs_max_slow_ring_trc - 1;
@@ -4090,6 +4247,30 @@ lpfc_debugfs_terminate(struct lpfc_vport *vport)
 			debugfs_remove(phba->debug_dumpDif); /* dumpDif */
 			phba->debug_dumpDif = NULL;
 		}
+		if (phba->debug_InjErrLBA) {
+			debugfs_remove(phba->debug_InjErrLBA); /* InjErrLBA */
+			phba->debug_InjErrLBA = NULL;
+		}
+		if (phba->debug_writeGuard) {
+			debugfs_remove(phba->debug_writeGuard); /* writeGuard */
+			phba->debug_writeGuard = NULL;
+		}
+		if (phba->debug_writeApp) {
+			debugfs_remove(phba->debug_writeApp); /* writeApp */
+			phba->debug_writeApp = NULL;
+		}
+		if (phba->debug_writeRef) {
+			debugfs_remove(phba->debug_writeRef); /* writeRef */
+			phba->debug_writeRef = NULL;
+		}
+		if (phba->debug_readApp) {
+			debugfs_remove(phba->debug_readApp); /* readApp */
+			phba->debug_readApp = NULL;
+		}
+		if (phba->debug_readRef) {
+			debugfs_remove(phba->debug_readRef); /* readRef */
+			phba->debug_readRef = NULL;
+		}
 
 		if (phba->slow_ring_trc) {
 			kfree(phba->slow_ring_trc);

drivers/scsi/lpfc/lpfc_hw4.h

@@ -1484,16 +1484,81 @@ struct sli4_sge {	/* SLI-4 */
 	uint32_t addr_lo;
 
 	uint32_t word2;
-#define lpfc_sli4_sge_offset_SHIFT	0 /* Offset of buffer - Not used*/
-#define lpfc_sli4_sge_offset_MASK	0x1FFFFFFF
+#define lpfc_sli4_sge_offset_SHIFT	0
+#define lpfc_sli4_sge_offset_MASK	0x07FFFFFF
 #define lpfc_sli4_sge_offset_WORD	word2
-#define lpfc_sli4_sge_last_SHIFT	31 /* Last SEG in the SGL sets
-						this  flag !! */
+#define lpfc_sli4_sge_type_SHIFT	27
+#define lpfc_sli4_sge_type_MASK		0x0000000F
+#define lpfc_sli4_sge_type_WORD		word2
+#define LPFC_SGE_TYPE_DATA		0x0
+#define LPFC_SGE_TYPE_DIF		0x4
+#define LPFC_SGE_TYPE_LSP		0x5
+#define LPFC_SGE_TYPE_PEDIF		0x6
+#define LPFC_SGE_TYPE_PESEED		0x7
+#define LPFC_SGE_TYPE_DISEED		0x8
+#define LPFC_SGE_TYPE_ENC		0x9
+#define LPFC_SGE_TYPE_ATM		0xA
+#define LPFC_SGE_TYPE_SKIP		0xC
+#define lpfc_sli4_sge_last_SHIFT	31 /* Last SEG in the SGL sets it */
 #define lpfc_sli4_sge_last_MASK		0x00000001
 #define lpfc_sli4_sge_last_WORD		word2
 	uint32_t sge_len;
 };
 
+struct sli4_sge_diseed {	/* SLI-4 */
+	uint32_t ref_tag;
+	uint32_t ref_tag_tran;
+
+	uint32_t word2;
+#define lpfc_sli4_sge_dif_apptran_SHIFT	0
+#define lpfc_sli4_sge_dif_apptran_MASK	0x0000FFFF
+#define lpfc_sli4_sge_dif_apptran_WORD	word2
+#define lpfc_sli4_sge_dif_af_SHIFT	24
+#define lpfc_sli4_sge_dif_af_MASK	0x00000001
+#define lpfc_sli4_sge_dif_af_WORD	word2
+#define lpfc_sli4_sge_dif_na_SHIFT	25
+#define lpfc_sli4_sge_dif_na_MASK	0x00000001
+#define lpfc_sli4_sge_dif_na_WORD	word2
+#define lpfc_sli4_sge_dif_hi_SHIFT	26
+#define lpfc_sli4_sge_dif_hi_MASK	0x00000001
+#define lpfc_sli4_sge_dif_hi_WORD	word2
+#define lpfc_sli4_sge_dif_type_SHIFT	27
+#define lpfc_sli4_sge_dif_type_MASK	0x0000000F
+#define lpfc_sli4_sge_dif_type_WORD	word2
+#define lpfc_sli4_sge_dif_last_SHIFT	31 /* Last SEG in the SGL sets it */
+#define lpfc_sli4_sge_dif_last_MASK	0x00000001
+#define lpfc_sli4_sge_dif_last_WORD	word2
+	uint32_t word3;
+#define lpfc_sli4_sge_dif_apptag_SHIFT	0
+#define lpfc_sli4_sge_dif_apptag_MASK	0x0000FFFF
+#define lpfc_sli4_sge_dif_apptag_WORD	word3
+#define lpfc_sli4_sge_dif_bs_SHIFT	16
+#define lpfc_sli4_sge_dif_bs_MASK	0x00000007
+#define lpfc_sli4_sge_dif_bs_WORD	word3
+#define lpfc_sli4_sge_dif_ai_SHIFT	19
+#define lpfc_sli4_sge_dif_ai_MASK	0x00000001
+#define lpfc_sli4_sge_dif_ai_WORD	word3
+#define lpfc_sli4_sge_dif_me_SHIFT	20
+#define lpfc_sli4_sge_dif_me_MASK	0x00000001
+#define lpfc_sli4_sge_dif_me_WORD	word3
+#define lpfc_sli4_sge_dif_re_SHIFT	21
+#define lpfc_sli4_sge_dif_re_MASK	0x00000001
+#define lpfc_sli4_sge_dif_re_WORD	word3
+#define lpfc_sli4_sge_dif_ce_SHIFT	22
+#define lpfc_sli4_sge_dif_ce_MASK	0x00000001
+#define lpfc_sli4_sge_dif_ce_WORD	word3
+#define lpfc_sli4_sge_dif_nr_SHIFT	23
+#define lpfc_sli4_sge_dif_nr_MASK	0x00000001
+#define lpfc_sli4_sge_dif_nr_WORD	word3
+#define lpfc_sli4_sge_dif_oprx_SHIFT	24
+#define lpfc_sli4_sge_dif_oprx_MASK	0x0000000F
+#define lpfc_sli4_sge_dif_oprx_WORD	word3
+#define lpfc_sli4_sge_dif_optx_SHIFT	28
+#define lpfc_sli4_sge_dif_optx_MASK	0x0000000F
+#define lpfc_sli4_sge_dif_optx_WORD	word3
+/* optx and oprx use BG_OP_IN defines in lpfc_hw.h */
+};
+
 struct fcf_record {
 	uint32_t max_rcv_size;
 	uint32_t fka_adv_period;
@@ -3023,6 +3088,9 @@ struct wqe_common {
 #define wqe_ctxt_tag_MASK     0x0000FFFF
 #define wqe_ctxt_tag_WORD     word6
 	uint32_t word7;
+#define wqe_dif_SHIFT         0
+#define wqe_dif_MASK          0x00000003
+#define wqe_dif_WORD          word7
 #define wqe_ct_SHIFT          2
 #define wqe_ct_MASK           0x00000003
 #define wqe_ct_WORD           word7
@@ -3035,12 +3103,21 @@ struct wqe_common {
 #define wqe_class_SHIFT       16
 #define wqe_class_MASK        0x00000007
 #define wqe_class_WORD        word7
+#define wqe_ar_SHIFT          19
+#define wqe_ar_MASK           0x00000001
+#define wqe_ar_WORD           word7
+#define wqe_ag_SHIFT          wqe_ar_SHIFT
+#define wqe_ag_MASK           wqe_ar_MASK
+#define wqe_ag_WORD           wqe_ar_WORD
 #define wqe_pu_SHIFT          20
 #define wqe_pu_MASK           0x00000003
 #define wqe_pu_WORD           word7
 #define wqe_erp_SHIFT         22
 #define wqe_erp_MASK          0x00000001
 #define wqe_erp_WORD          word7
+#define wqe_conf_SHIFT        wqe_erp_SHIFT
+#define wqe_conf_MASK         wqe_erp_MASK
+#define wqe_conf_WORD         wqe_erp_WORD
 #define wqe_lnk_SHIFT         23
 #define wqe_lnk_MASK          0x00000001
 #define wqe_lnk_WORD          word7
@@ -3099,6 +3176,9 @@ struct wqe_common {
 #define wqe_xc_SHIFT          21
 #define wqe_xc_MASK           0x00000001
 #define wqe_xc_WORD           word10
+#define wqe_sr_SHIFT          22
+#define wqe_sr_MASK           0x00000001
+#define wqe_sr_WORD           word10
 #define wqe_ccpe_SHIFT        23
 #define wqe_ccpe_MASK         0x00000001
 #define wqe_ccpe_WORD         word10

drivers/scsi/lpfc/lpfc_scsi.c

@@ -58,6 +58,13 @@ static char *dif_op_str[] = {
 	"SCSI_PROT_READ_PASS",
 	"SCSI_PROT_WRITE_PASS",
 };
+
+struct scsi_dif_tuple {
+	__be16 guard_tag;       /* Checksum */
+	__be16 app_tag;         /* Opaque storage */
+	__be32 ref_tag;         /* Target LBA or indirect LBA */
+};
+
 static void
 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
 static void
@@ -1263,6 +1270,174 @@ lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 	return 0;
 }
 
+static inline unsigned
+lpfc_cmd_blksize(struct scsi_cmnd *sc)
+{
+	return sc->device->sector_size;
+}
+
+#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
+/*
+ * Given a scsi cmnd, determine the BlockGuard tags to be used with it
+ * @sc: The SCSI command to examine
+ * @reftag: (out) BlockGuard reference tag for transmitted data
+ * @apptag: (out) BlockGuard application tag for transmitted data
+ * @new_guard (in) Value to replace CRC with if needed
+ *
+ * Returns (1) if error injection was performed, (0) otherwise
+ */
+static int
+lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
+		uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
+{
+	struct scatterlist *sgpe; /* s/g prot entry */
+	struct scatterlist *sgde; /* s/g data entry */
+	struct scsi_dif_tuple *src;
+	uint32_t op = scsi_get_prot_op(sc);
+	uint32_t blksize;
+	uint32_t numblks;
+	sector_t lba;
+	int rc = 0;
+
+	if (op == SCSI_PROT_NORMAL)
+		return 0;
+
+	lba = scsi_get_lba(sc);
+	if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
+		blksize = lpfc_cmd_blksize(sc);
+		numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
+
+		/* Make sure we have the right LBA if one is specified */
+		if ((phba->lpfc_injerr_lba < lba) ||
+			(phba->lpfc_injerr_lba >= (lba + numblks)))
+			return 0;
+	}
+
+	sgpe = scsi_prot_sglist(sc);
+	sgde = scsi_sglist(sc);
+
+	/* Should we change the Reference Tag */
+	if (reftag) {
+		/*
+		 * If we are SCSI_PROT_WRITE_STRIP, the protection data is
+		 * being stripped from the wire, thus it doesn't matter.
+		 */
+		if ((op == SCSI_PROT_WRITE_PASS) ||
+			(op == SCSI_PROT_WRITE_INSERT)) {
+			if (phba->lpfc_injerr_wref_cnt) {
+
+				/* DEADBEEF will be the reftag on the wire */
+				*reftag = 0xDEADBEEF;
+				phba->lpfc_injerr_wref_cnt--;
+				phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF;
+				rc = 1;
+
+				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
+					"9081 BLKGRD: Injecting reftag error: "
+					"write lba x%lx\n", (unsigned long)lba);
+			}
+		} else {
+			if (phba->lpfc_injerr_rref_cnt) {
+				*reftag = 0xDEADBEEF;
+				phba->lpfc_injerr_rref_cnt--;
+				phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF;
+				rc = 1;
+
+				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
+					"9076 BLKGRD: Injecting reftag error: "
+					"read lba x%lx\n", (unsigned long)lba);
+			}
+		}
+	}
+
+	/* Should we change the Application Tag */
+	if (apptag) {
+		/*
+		 * If we are SCSI_PROT_WRITE_STRIP, the protection data is
+		 * being stripped from the wire, thus it doesn't matter.
+		 */
+		if ((op == SCSI_PROT_WRITE_PASS) ||
+			(op == SCSI_PROT_WRITE_INSERT)) {
+			if (phba->lpfc_injerr_wapp_cnt) {
+
+				/* DEAD will be the apptag on the wire */
+				*apptag = 0xDEAD;
+				phba->lpfc_injerr_wapp_cnt--;
+				phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF;
+				rc = 1;
+
+				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
+					"9077 BLKGRD: Injecting apptag error: "
+					"write lba x%lx\n", (unsigned long)lba);
+			}
+		} else {
+			if (phba->lpfc_injerr_rapp_cnt) {
+				*apptag = 0xDEAD;
+				phba->lpfc_injerr_rapp_cnt--;
+				phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF;
+				rc = 1;
+
+				lpfc_printf_log(phba, KERN_ERR, LOG_BG,
+					"9078 BLKGRD: Injecting apptag error: "
+					"read lba x%lx\n", (unsigned long)lba);
+			}
+		}
+	}
+
+	/* Should we change the Guard Tag */
+
+	/*
+	 * If we are SCSI_PROT_WRITE_INSERT, the protection data is
+	 * being on the wire is being fully generated on the HBA.
+	 * The host cannot change it or force an error.
+	 */
+	if (((op == SCSI_PROT_WRITE_STRIP) ||
+		(op == SCSI_PROT_WRITE_PASS)) &&
+		phba->lpfc_injerr_wgrd_cnt) {
+		if (sgpe) {
+			src = (struct scsi_dif_tuple *)sg_virt(sgpe);
+			/*
+			 * Just inject an error in the first
+			 * prot block.
+			 */
+			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
+				"9079 BLKGRD: Injecting guard error: "
+				"write lba x%lx oldGuard x%x refTag x%x\n",
+				(unsigned long)lba, src->guard_tag,
+				src->ref_tag);
+
+			src->guard_tag = (uint16_t)new_guard;
+			phba->lpfc_injerr_wgrd_cnt--;
+			phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF;
+			rc = 1;
+
+		} else {
+			blksize = lpfc_cmd_blksize(sc);
+			/*
+			 * Jump past the first data block
+			 * and inject an error in the
+			 * prot data. The prot data is already
+			 * embedded after the regular data.
+			 */
+			src = (struct scsi_dif_tuple *)
+					(sg_virt(sgde) + blksize);
+
+			lpfc_printf_log(phba, KERN_ERR, LOG_BG,
+				"9080 BLKGRD: Injecting guard error: "
+				"write lba x%lx oldGuard x%x refTag x%x\n",
+				(unsigned long)lba, src->guard_tag,
+				src->ref_tag);
+
+			src->guard_tag = (uint16_t)new_guard;
+			phba->lpfc_injerr_wgrd_cnt--;
+			phba->lpfc_injerr_lba = LPFC_INJERR_LBA_OFF;
+			rc = 1;
+		}
+	}
+	return rc;
+}
+#endif
+
 /*
  * Given a scsi cmnd, determine the BlockGuard opcodes to be used with it
  * @sc: The SCSI command to examine
@@ -1341,18 +1516,6 @@ lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 	return ret;
 }
 
-struct scsi_dif_tuple {
-	__be16 guard_tag;       /* Checksum */
-	__be16 app_tag;         /* Opaque storage */
-	__be32 ref_tag;         /* Target LBA or indirect LBA */
-};
-
-static inline unsigned
-lpfc_cmd_blksize(struct scsi_cmnd *sc)
-{
-	return sc->device->sector_size;
-}
-
 /*
  * This function sets up buffer list for protection groups of
  * type LPFC_PG_TYPE_NO_DIF
@@ -1401,6 +1564,11 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 	blksize = lpfc_cmd_blksize(sc);
 	reftag = scsi_get_lba(sc) & 0xffffffff;
 
+#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
+	/* reftag is the only error we can inject here */
+	lpfc_bg_err_inject(phba, sc, &reftag, 0, 0);
+#endif
+
 	/* setup PDE5 with what we have */
 	pde5 = (struct lpfc_pde5 *) bpl;
 	memset(pde5, 0, sizeof(struct lpfc_pde5));
@@ -1532,6 +1700,11 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 	blksize = lpfc_cmd_blksize(sc);
 	reftag = scsi_get_lba(sc) & 0xffffffff;
 
+#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
+	/* reftag / guard tag are the only errors we can inject here */
+	lpfc_bg_err_inject(phba, sc, &reftag, 0, 0xDEAD);
+#endif
+
 	split_offset = 0;
 	do {
 		/* setup PDE5 with what we have */
@@ -1671,7 +1844,6 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 		}
 
 	} while (!alldone);
-
 out:
 
 	return num_bde;
@@ -2075,6 +2247,7 @@ lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
 			else
 				bf_set(lpfc_sli4_sge_last, sgl, 0);
 			bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
+			bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
 			sgl->word2 = cpu_to_le32(sgl->word2);
 			sgl->sge_len = cpu_to_le32(dma_len);
 			dma_offset += dma_len;

drivers/scsi/lpfc/lpfc_sli.c

@@ -7538,6 +7538,8 @@ lpfc_sli4_bpl2sgl(struct lpfc_hba *phba, struct lpfc_iocbq *piocbq,
 				if (inbound == 1)
 					offset = 0;
 				bf_set(lpfc_sli4_sge_offset, sgl, offset);
+				bf_set(lpfc_sli4_sge_type, sgl,
+					LPFC_SGE_TYPE_DATA);
 				offset += bde.tus.f.bdeSize;
 			}
 			sgl->word2 = cpu_to_le32(sgl->word2);