[SCSI] bnx2fc: Handle REC_TOV error code from firmware
Driver decides to initiate REC on REC_TOV timer pop. The firmware maintains the REC timer and informs the driver as a firmware error message, which is an unsolicited event to the driver. Driver also issues REC on other unsolicited events from firmware that indicate data loss. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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7444695429
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7b59476912
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@ -143,6 +143,7 @@
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#define SRR_RETRY_COUNT 5
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#define REC_RETRY_COUNT 1
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#define BNX2FC_NUM_ERR_BITS 63
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/* bnx2fc driver uses only one instance of fcoe_percpu_s */
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extern struct fcoe_percpu_s bnx2fc_global;
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@ -629,6 +629,8 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
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struct bnx2fc_hba *hba = interface->hba;
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int task_idx, index;
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int rc = 0;
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u64 err_warn_bit_map;
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u8 err_warn = 0xff;
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BNX2FC_TGT_DBG(tgt, "Entered UNSOL COMPLETION wqe = 0x%x\n", wqe);
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@ -691,13 +693,11 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
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BNX2FC_TGT_DBG(tgt, "buf_offsets - tx = 0x%x, rx = 0x%x\n",
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err_entry->data.tx_buf_off, err_entry->data.rx_buf_off);
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bnx2fc_return_rqe(tgt, 1);
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if (xid > BNX2FC_MAX_XID) {
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BNX2FC_TGT_DBG(tgt, "xid(0x%x) out of FW range\n",
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xid);
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spin_unlock_bh(&tgt->tgt_lock);
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break;
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goto ret_err_rqe;
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}
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task_idx = xid / BNX2FC_TASKS_PER_PAGE;
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@ -707,24 +707,30 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
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task = &(task_page[index]);
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io_req = (struct bnx2fc_cmd *)hba->cmd_mgr->cmds[xid];
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if (!io_req) {
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spin_unlock_bh(&tgt->tgt_lock);
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break;
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}
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if (!io_req)
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goto ret_err_rqe;
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if (io_req->cmd_type != BNX2FC_SCSI_CMD) {
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printk(KERN_ERR PFX "err_warn: Not a SCSI cmd\n");
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spin_unlock_bh(&tgt->tgt_lock);
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break;
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goto ret_err_rqe;
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}
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if (test_and_clear_bit(BNX2FC_FLAG_IO_CLEANUP,
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&io_req->req_flags)) {
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BNX2FC_IO_DBG(io_req, "unsol_err: cleanup in "
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"progress.. ignore unsol err\n");
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spin_unlock_bh(&tgt->tgt_lock);
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goto ret_err_rqe;
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}
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err_warn_bit_map = (u64)
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((u64)err_entry->data.err_warn_bitmap_hi << 32) |
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(u64)err_entry->data.err_warn_bitmap_lo;
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for (i = 0; i < BNX2FC_NUM_ERR_BITS; i++) {
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if (err_warn_bit_map & (u64)((u64)1 << i)) {
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err_warn = i;
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break;
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}
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}
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/*
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* If ABTS is already in progress, and FW error is
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@ -733,26 +739,61 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
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* logging out the target, when the ABTS eventually
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* times out.
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*/
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if (!test_and_set_bit(BNX2FC_FLAG_ISSUE_ABTS,
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if (test_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags)) {
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printk(KERN_ERR PFX "err_warn: io_req (0x%x) already "
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"in ABTS processing\n", xid);
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goto ret_err_rqe;
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}
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BNX2FC_TGT_DBG(tgt, "err = 0x%x\n", err_warn);
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if (tgt->dev_type != TYPE_TAPE)
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goto skip_rec;
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switch (err_warn) {
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case FCOE_ERROR_CODE_REC_TOV_TIMER_EXPIRATION:
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case FCOE_ERROR_CODE_DATA_OOO_RO:
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case FCOE_ERROR_CODE_COMMON_INCORRECT_SEQ_CNT:
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case FCOE_ERROR_CODE_DATA_SOFI3_SEQ_ACTIVE_SET:
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case FCOE_ERROR_CODE_FCP_RSP_OPENED_SEQ:
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case FCOE_ERROR_CODE_DATA_SOFN_SEQ_ACTIVE_RESET:
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BNX2FC_TGT_DBG(tgt, "REC TOV popped for xid - 0x%x\n",
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xid);
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memset(&io_req->err_entry, 0,
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sizeof(struct fcoe_err_report_entry));
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memcpy(&io_req->err_entry, err_entry,
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sizeof(struct fcoe_err_report_entry));
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if (!test_bit(BNX2FC_FLAG_SRR_SENT,
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&io_req->req_flags)) {
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spin_unlock_bh(&tgt->tgt_lock);
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rc = bnx2fc_send_rec(io_req);
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spin_lock_bh(&tgt->tgt_lock);
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if (rc)
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goto skip_rec;
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} else
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printk(KERN_ERR PFX "SRR in progress\n");
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goto ret_err_rqe;
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break;
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default:
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break;
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}
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skip_rec:
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set_bit(BNX2FC_FLAG_ISSUE_ABTS, &io_req->req_flags);
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/*
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* Cancel the timeout_work, as we received IO
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* completion with FW error.
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*/
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if (cancel_delayed_work(&io_req->timeout_work))
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kref_put(&io_req->refcount,
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bnx2fc_cmd_release); /* timer hold */
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kref_put(&io_req->refcount, bnx2fc_cmd_release);
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rc = bnx2fc_initiate_abts(io_req);
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if (rc != SUCCESS) {
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BNX2FC_IO_DBG(io_req, "err_warn: initiate_abts "
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"failed. issue cleanup\n");
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rc = bnx2fc_initiate_cleanup(io_req);
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BUG_ON(rc);
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printk(KERN_ERR PFX "err_warn: initiate_abts "
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"failed xid = 0x%x. issue cleanup\n",
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io_req->xid);
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bnx2fc_initiate_cleanup(io_req);
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}
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} else
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printk(KERN_ERR PFX "err_warn: io_req (0x%x) already "
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"in ABTS processing\n", xid);
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ret_err_rqe:
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bnx2fc_return_rqe(tgt, 1);
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spin_unlock_bh(&tgt->tgt_lock);
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break;
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@ -773,6 +814,47 @@ static void bnx2fc_process_unsol_compl(struct bnx2fc_rport *tgt, u16 wqe)
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BNX2FC_TGT_DBG(tgt, "buf_offsets - tx = 0x%x, rx = 0x%x",
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err_entry->data.tx_buf_off, err_entry->data.rx_buf_off);
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if (xid > BNX2FC_MAX_XID) {
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BNX2FC_TGT_DBG(tgt, "xid(0x%x) out of FW range\n", xid);
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goto ret_warn_rqe;
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}
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err_warn_bit_map = (u64)
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((u64)err_entry->data.err_warn_bitmap_hi << 32) |
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(u64)err_entry->data.err_warn_bitmap_lo;
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for (i = 0; i < BNX2FC_NUM_ERR_BITS; i++) {
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if (err_warn_bit_map & (u64) (1 << i)) {
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err_warn = i;
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break;
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}
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}
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BNX2FC_TGT_DBG(tgt, "warn = 0x%x\n", err_warn);
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task_idx = xid / BNX2FC_TASKS_PER_PAGE;
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index = xid % BNX2FC_TASKS_PER_PAGE;
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task_page = (struct fcoe_task_ctx_entry *)
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interface->hba->task_ctx[task_idx];
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task = &(task_page[index]);
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io_req = (struct bnx2fc_cmd *)hba->cmd_mgr->cmds[xid];
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if (!io_req)
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goto ret_warn_rqe;
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if (io_req->cmd_type != BNX2FC_SCSI_CMD) {
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printk(KERN_ERR PFX "err_warn: Not a SCSI cmd\n");
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goto ret_warn_rqe;
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}
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memset(&io_req->err_entry, 0,
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sizeof(struct fcoe_err_report_entry));
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memcpy(&io_req->err_entry, err_entry,
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sizeof(struct fcoe_err_report_entry));
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if (err_warn == FCOE_ERROR_CODE_REC_TOV_TIMER_EXPIRATION)
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/* REC_TOV is not a warning code */
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BUG_ON(1);
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else
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BNX2FC_TGT_DBG(tgt, "Unsolicited warning\n");
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ret_warn_rqe:
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bnx2fc_return_rqe(tgt, 1);
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spin_unlock_bh(&tgt->tgt_lock);
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break;
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