From acafd0b920e1a4a94a03f1911b4fb87e2081f235 Mon Sep 17 00:00:00 2001 From: "Ewan D. Milne" Date: Thu, 4 Dec 2014 11:49:28 -0500 Subject: [PATCH] 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 Acked-by: Douglas Gilbert Tested-by: Douglas Gilbert Signed-off-by: Christoph Hellwig --- drivers/scsi/scsi_debug.c | 74 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 71 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 1435b1502975..8bcf6ad0d765 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -93,6 +93,8 @@ static const char *scsi_debug_version_date = "20141022"; #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 @@ static const char *scsi_debug_version_date = "20141022"; #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_10(struct scsi_cmnd *, struct sdebug_dev_info *); 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 @@ static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = { {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 @@ static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only, 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 @@ resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 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) {