scsi_debug: Implement WRITE BUFFER command
Accept the WRITE BUFFER command and do nothing other than
set the appropriate "microcode has been changed" UA on the LU.
>From an earlier patch by Doug Gilbert.
Signed-off-by: Ewan D. Milne <emilne@redhat.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Tested-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 1435b15..8bcf6ad 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -93,6 +93,8 @@
#define THRESHOLD_EXCEEDED 0x5d
#define LOW_POWER_COND_ON 0x5e
#define MISCOMPARE_VERIFY_ASC 0x1d
+#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
+#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
/* Additional Sense Code Qualifier (ASCQ) */
#define ACK_NAK_TO 0x3
@@ -183,7 +185,9 @@
#define SDEBUG_UA_MODE_CHANGED 2
#define SDEBUG_UA_CAPACITY_CHANGED 3
#define SDEBUG_UA_LUNS_CHANGED 4
-#define SDEBUG_NUM_UAS 5
+#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
+#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
+#define SDEBUG_NUM_UAS 7
/* for check_readiness() */
#define UAS_ONLY 1 /* check for UAs only */
@@ -329,6 +333,7 @@
static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
+static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
struct opcode_info_t {
u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
@@ -483,8 +488,9 @@
{0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
0, 0, 0, 0, 0, 0} },
- {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* WRITE_BUFFER */
- {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
+ {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
+ {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
+ 0, 0, 0, 0} }, /* WRITE_BUFFER */
{1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
@@ -836,6 +842,19 @@
if (debug)
cp = "capacity data changed";
break;
+ case SDEBUG_UA_MICROCODE_CHANGED:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
+ if (debug)
+ cp = "microcode has been changed";
+ break;
+ case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
+ mk_sense_buffer(SCpnt, UNIT_ATTENTION,
+ TARGET_CHANGED_ASC,
+ MICROCODE_CHANGED_WO_RESET_ASCQ);
+ if (debug)
+ cp = "microcode has been changed without reset";
+ break;
case SDEBUG_UA_LUNS_CHANGED:
/*
* SPC-3 behavior is to report a UNIT ATTENTION with
@@ -3069,6 +3088,55 @@
return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
}
+/* Note the mode field is in the same position as the (lower) service action
+ * field. For the Report supported operation codes command, SPC-4 suggests
+ * each mode of this command should be reported separately; for future. */
+static int
+resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
+{
+ u8 *cmd = scp->cmnd;
+ struct scsi_device *sdp = scp->device;
+ struct sdebug_dev_info *dp;
+ u8 mode;
+
+ mode = cmd[1] & 0x1f;
+ switch (mode) {
+ case 0x4: /* download microcode (MC) and activate (ACT) */
+ /* set UAs on this device only */
+ set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
+ set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
+ break;
+ case 0x5: /* download MC, save and ACT */
+ set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
+ break;
+ case 0x6: /* download MC with offsets and ACT */
+ /* set UAs on most devices (LUs) in this target */
+ list_for_each_entry(dp,
+ &devip->sdbg_host->dev_info_list,
+ dev_list)
+ if (dp->target == sdp->id) {
+ set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
+ if (devip != dp)
+ set_bit(SDEBUG_UA_MICROCODE_CHANGED,
+ dp->uas_bm);
+ }
+ break;
+ case 0x7: /* download MC with offsets, save, and ACT */
+ /* set UA on all devices (LUs) in this target */
+ list_for_each_entry(dp,
+ &devip->sdbg_host->dev_info_list,
+ dev_list)
+ if (dp->target == sdp->id)
+ set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
+ dp->uas_bm);
+ break;
+ default:
+ /* do nothing for this command for other mode values */
+ break;
+ }
+ return 0;
+}
+
static int
resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
{