scsi: qla2xxx: Allow 32-byte CDBs
System crashes when a 32-byte CDB was sent to a non T10 PI disk: [ 177.143279] ? qla2xxx_dif_start_scsi_mq+0xcd8/0xce0 [qla2xxx] [ 177.149165] ? internal_add_timer+0x42/0x70 [ 177.153372] qla2xxx_mqueuecommand+0x207/0x2b0 [qla2xxx] [ 177.158730] scsi_queue_rq+0x2b7/0xc00 [ 177.162501] blk_mq_dispatch_rq_list+0x3ea/0x7e0 Current code attempted to use CRC IOCB to send the command but failed. Instead, type 6 IOCB should be used to send the I/O. Clone existing type 6 IOCB code with addition of MQ support to allow 32-byte CDBs to go through. Signed-off-by: Quinn Tran <qutran@marvell.com> Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by: Nilesh Javali <njavali@marvell.com> Link: https://lore.kernel.org/r/20230817063132.21900-3-njavali@marvell.com Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran
Martin K. Petersen
parent
efeda3bf91
commit
ae25f65a35
2 changed files with 272 additions and 1 deletions
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@ -11,6 +11,7 @@
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#include <scsi/scsi_tcq.h>
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static int qla_start_scsi_type6(srb_t *sp);
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/**
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* qla2x00_get_cmd_direction() - Determine control_flag data direction.
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* @sp: SCSI command
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@ -1721,6 +1722,8 @@ qla24xx_dif_start_scsi(srb_t *sp)
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if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
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if (cmd->cmd_len <= 16)
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return qla24xx_start_scsi(sp);
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else
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return qla_start_scsi_type6(sp);
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}
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/* Setup device pointers. */
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@ -2100,6 +2103,8 @@ qla2xxx_dif_start_scsi_mq(srb_t *sp)
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if (scsi_get_prot_op(cmd) == SCSI_PROT_NORMAL) {
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if (cmd->cmd_len <= 16)
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return qla2xxx_start_scsi_mq(sp);
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else
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return qla_start_scsi_type6(sp);
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}
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spin_lock_irqsave(&qpair->qp_lock, flags);
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@ -4197,3 +4202,267 @@ qla2x00_start_bidir(srb_t *sp, struct scsi_qla_host *vha, uint32_t tot_dsds)
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return rval;
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}
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/**
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* qla_start_scsi_type6() - Send a SCSI command to the ISP
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* @sp: command to send to the ISP
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*
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* Returns non-zero if a failure occurred, else zero.
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*/
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static int
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qla_start_scsi_type6(srb_t *sp)
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{
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int nseg;
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unsigned long flags;
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uint32_t *clr_ptr;
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uint32_t handle;
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struct cmd_type_6 *cmd_pkt;
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uint16_t cnt;
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uint16_t req_cnt;
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uint16_t tot_dsds;
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struct req_que *req = NULL;
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struct rsp_que *rsp;
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struct scsi_cmnd *cmd = GET_CMD_SP(sp);
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struct scsi_qla_host *vha = sp->fcport->vha;
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struct qla_hw_data *ha = vha->hw;
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struct qla_qpair *qpair = sp->qpair;
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uint16_t more_dsd_lists = 0;
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struct dsd_dma *dsd_ptr;
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uint16_t i;
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__be32 *fcp_dl;
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uint8_t additional_cdb_len;
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struct ct6_dsd *ctx;
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/* Acquire qpair specific lock */
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spin_lock_irqsave(&qpair->qp_lock, flags);
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/* Setup qpair pointers */
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req = qpair->req;
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rsp = qpair->rsp;
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/* So we know we haven't pci_map'ed anything yet */
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tot_dsds = 0;
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/* Send marker if required */
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if (vha->marker_needed != 0) {
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if (__qla2x00_marker(vha, qpair, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {
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spin_unlock_irqrestore(&qpair->qp_lock, flags);
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return QLA_FUNCTION_FAILED;
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}
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vha->marker_needed = 0;
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}
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handle = qla2xxx_get_next_handle(req);
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if (handle == 0)
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goto queuing_error;
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/* Map the sg table so we have an accurate count of sg entries needed */
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if (scsi_sg_count(cmd)) {
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nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd),
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scsi_sg_count(cmd), cmd->sc_data_direction);
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if (unlikely(!nseg))
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goto queuing_error;
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} else {
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nseg = 0;
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}
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tot_dsds = nseg;
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/* eventhough driver only need 1 T6 IOCB, FW still convert DSD to Continueation IOCB */
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req_cnt = qla24xx_calc_iocbs(vha, tot_dsds);
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sp->iores.res_type = RESOURCE_IOCB | RESOURCE_EXCH;
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sp->iores.exch_cnt = 1;
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sp->iores.iocb_cnt = req_cnt;
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if (qla_get_fw_resources(sp->qpair, &sp->iores))
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goto queuing_error;
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more_dsd_lists = qla24xx_calc_dsd_lists(tot_dsds);
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if ((more_dsd_lists + qpair->dsd_inuse) >= NUM_DSD_CHAIN) {
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ql_dbg(ql_dbg_io, vha, 0x3028,
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"Num of DSD list %d is than %d for cmd=%p.\n",
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more_dsd_lists + qpair->dsd_inuse, NUM_DSD_CHAIN, cmd);
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goto queuing_error;
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}
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if (more_dsd_lists <= qpair->dsd_avail)
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goto sufficient_dsds;
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else
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more_dsd_lists -= qpair->dsd_avail;
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for (i = 0; i < more_dsd_lists; i++) {
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dsd_ptr = kzalloc(sizeof(*dsd_ptr), GFP_ATOMIC);
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if (!dsd_ptr) {
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ql_log(ql_log_fatal, vha, 0x3029,
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"Failed to allocate memory for dsd_dma for cmd=%p.\n", cmd);
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goto queuing_error;
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}
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INIT_LIST_HEAD(&dsd_ptr->list);
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dsd_ptr->dsd_addr = dma_pool_alloc(ha->dl_dma_pool,
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GFP_ATOMIC, &dsd_ptr->dsd_list_dma);
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if (!dsd_ptr->dsd_addr) {
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kfree(dsd_ptr);
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ql_log(ql_log_fatal, vha, 0x302a,
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"Failed to allocate memory for dsd_addr for cmd=%p.\n", cmd);
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goto queuing_error;
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}
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list_add_tail(&dsd_ptr->list, &qpair->dsd_list);
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qpair->dsd_avail++;
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}
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sufficient_dsds:
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req_cnt = 1;
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if (req->cnt < (req_cnt + 2)) {
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if (IS_SHADOW_REG_CAPABLE(ha)) {
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cnt = *req->out_ptr;
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} else {
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cnt = (uint16_t)rd_reg_dword_relaxed(req->req_q_out);
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if (qla2x00_check_reg16_for_disconnect(vha, cnt))
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goto queuing_error;
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}
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if (req->ring_index < cnt)
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req->cnt = cnt - req->ring_index;
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else
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req->cnt = req->length - (req->ring_index - cnt);
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if (req->cnt < (req_cnt + 2))
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goto queuing_error;
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}
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ctx = &sp->u.scmd.ct6_ctx;
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memset(ctx, 0, sizeof(struct ct6_dsd));
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ctx->fcp_cmnd = dma_pool_zalloc(ha->fcp_cmnd_dma_pool,
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GFP_ATOMIC, &ctx->fcp_cmnd_dma);
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if (!ctx->fcp_cmnd) {
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ql_log(ql_log_fatal, vha, 0x3031,
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"Failed to allocate fcp_cmnd for cmd=%p.\n", cmd);
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goto queuing_error;
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}
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/* Initialize the DSD list and dma handle */
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INIT_LIST_HEAD(&ctx->dsd_list);
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ctx->dsd_use_cnt = 0;
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if (cmd->cmd_len > 16) {
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additional_cdb_len = cmd->cmd_len - 16;
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if (cmd->cmd_len % 4 ||
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cmd->cmd_len > QLA_CDB_BUF_SIZE) {
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/*
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* SCSI command bigger than 16 bytes must be
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* multiple of 4 or too big.
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*/
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ql_log(ql_log_warn, vha, 0x3033,
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"scsi cmd len %d not multiple of 4 for cmd=%p.\n",
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cmd->cmd_len, cmd);
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goto queuing_error_fcp_cmnd;
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}
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ctx->fcp_cmnd_len = 12 + cmd->cmd_len + 4;
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} else {
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additional_cdb_len = 0;
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ctx->fcp_cmnd_len = 12 + 16 + 4;
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}
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/* Build command packet. */
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req->current_outstanding_cmd = handle;
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req->outstanding_cmds[handle] = sp;
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sp->handle = handle;
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cmd->host_scribble = (unsigned char *)(unsigned long)handle;
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req->cnt -= req_cnt;
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cmd_pkt = (struct cmd_type_6 *)req->ring_ptr;
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cmd_pkt->handle = make_handle(req->id, handle);
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/* tagged queuing modifier -- default is TSK_SIMPLE (0). */
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clr_ptr = (uint32_t *)cmd_pkt + 2;
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memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);
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cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);
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/* Set NPORT-ID and LUN number */
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cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);
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cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;
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cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;
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cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;
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cmd_pkt->vp_index = sp->vha->vp_idx;
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/* Build IOCB segments */
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qla24xx_build_scsi_type_6_iocbs(sp, cmd_pkt, tot_dsds);
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int_to_scsilun(cmd->device->lun, &cmd_pkt->lun);
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host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun));
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/* build FCP_CMND IU */
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int_to_scsilun(cmd->device->lun, &ctx->fcp_cmnd->lun);
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ctx->fcp_cmnd->additional_cdb_len = additional_cdb_len;
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if (cmd->sc_data_direction == DMA_TO_DEVICE)
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ctx->fcp_cmnd->additional_cdb_len |= 1;
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else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
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ctx->fcp_cmnd->additional_cdb_len |= 2;
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/* Populate the FCP_PRIO. */
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if (ha->flags.fcp_prio_enabled)
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ctx->fcp_cmnd->task_attribute |=
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sp->fcport->fcp_prio << 3;
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memcpy(ctx->fcp_cmnd->cdb, cmd->cmnd, cmd->cmd_len);
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fcp_dl = (__be32 *)(ctx->fcp_cmnd->cdb + 16 +
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additional_cdb_len);
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*fcp_dl = htonl((uint32_t)scsi_bufflen(cmd));
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cmd_pkt->fcp_cmnd_dseg_len = cpu_to_le16(ctx->fcp_cmnd_len);
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put_unaligned_le64(ctx->fcp_cmnd_dma,
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&cmd_pkt->fcp_cmnd_dseg_address);
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sp->flags |= SRB_FCP_CMND_DMA_VALID;
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cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd));
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/* Set total data segment count. */
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cmd_pkt->entry_count = (uint8_t)req_cnt;
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wmb();
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/* Adjust ring index. */
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req->ring_index++;
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if (req->ring_index == req->length) {
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req->ring_index = 0;
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req->ring_ptr = req->ring;
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} else {
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req->ring_ptr++;
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}
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sp->qpair->cmd_cnt++;
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sp->flags |= SRB_DMA_VALID;
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/* Set chip new ring index. */
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wrt_reg_dword(req->req_q_in, req->ring_index);
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/* Manage unprocessed RIO/ZIO commands in response queue. */
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if (vha->flags.process_response_queue &&
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rsp->ring_ptr->signature != RESPONSE_PROCESSED)
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qla24xx_process_response_queue(vha, rsp);
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spin_unlock_irqrestore(&qpair->qp_lock, flags);
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return QLA_SUCCESS;
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queuing_error_fcp_cmnd:
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dma_pool_free(ha->fcp_cmnd_dma_pool, ctx->fcp_cmnd, ctx->fcp_cmnd_dma);
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queuing_error:
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if (tot_dsds)
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scsi_dma_unmap(cmd);
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qla_put_fw_resources(sp->qpair, &sp->iores);
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if (sp->u.scmd.crc_ctx) {
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mempool_free(sp->u.scmd.crc_ctx, ha->ctx_mempool);
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sp->u.scmd.crc_ctx = NULL;
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}
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spin_unlock_irqrestore(&qpair->qp_lock, flags);
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return QLA_FUNCTION_FAILED;
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}
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@ -857,7 +857,9 @@ struct fcp_cmnd {
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uint8_t task_attribute;
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uint8_t task_management;
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uint8_t additional_cdb_len;
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uint8_t cdb[260]; /* 256 for CDB len and 4 for FCP_DL */
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#define QLA_CDB_BUF_SIZE 256
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#define QLA_FCP_DL_SIZE 4
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uint8_t cdb[QLA_CDB_BUF_SIZE + QLA_FCP_DL_SIZE]; /* 256 for CDB len and 4 for FCP_DL */
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};
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struct dsd_dma {
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