[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>
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 2a3c9c9..5b8790b 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -58,6 +58,13 @@
"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 @@
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 @@
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 @@
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 @@
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 @@
}
} while (!alldone);
-
out:
return num_bde;
@@ -2075,6 +2247,7 @@
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;