![Christoph Hellwig](/assets/img/avatar_default.png)
Unless we want to build a SPI tag message we should just check SCMD_TAGGED instead of reverse engineering a tag type through the use of scsi_populate_tag_msg. Also rename the function to spi_populate_tag_msg, make it behave like the other spi message helpers, and move it to the spi transport class. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Reviewed-by: Hannes Reinecke <hare@suse.de>
543 lines
14 KiB
C
543 lines
14 KiB
C
/*
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* QLogic iSCSI HBA Driver
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* Copyright (c) 2003-2013 QLogic Corporation
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*
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* See LICENSE.qla4xxx for copyright and licensing details.
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*/
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#include "ql4_def.h"
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#include "ql4_glbl.h"
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#include "ql4_dbg.h"
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#include "ql4_inline.h"
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#include <scsi/scsi_tcq.h>
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static int
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qla4xxx_space_in_req_ring(struct scsi_qla_host *ha, uint16_t req_cnt)
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{
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uint16_t cnt;
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/* Calculate number of free request entries. */
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if ((req_cnt + 2) >= ha->req_q_count) {
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cnt = (uint16_t) ha->isp_ops->rd_shdw_req_q_out(ha);
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if (ha->request_in < cnt)
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ha->req_q_count = cnt - ha->request_in;
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else
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ha->req_q_count = REQUEST_QUEUE_DEPTH -
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(ha->request_in - cnt);
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}
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/* Check if room for request in request ring. */
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if ((req_cnt + 2) < ha->req_q_count)
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return 1;
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else
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return 0;
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}
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static void qla4xxx_advance_req_ring_ptr(struct scsi_qla_host *ha)
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{
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/* Advance request queue pointer */
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if (ha->request_in == (REQUEST_QUEUE_DEPTH - 1)) {
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ha->request_in = 0;
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ha->request_ptr = ha->request_ring;
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} else {
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ha->request_in++;
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ha->request_ptr++;
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}
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}
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/**
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* qla4xxx_get_req_pkt - returns a valid entry in request queue.
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* @ha: Pointer to host adapter structure.
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* @queue_entry: Pointer to pointer to queue entry structure
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*
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* This routine performs the following tasks:
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* - returns the current request_in pointer (if queue not full)
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* - advances the request_in pointer
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* - checks for queue full
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**/
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static int qla4xxx_get_req_pkt(struct scsi_qla_host *ha,
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struct queue_entry **queue_entry)
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{
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uint16_t req_cnt = 1;
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if (qla4xxx_space_in_req_ring(ha, req_cnt)) {
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*queue_entry = ha->request_ptr;
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memset(*queue_entry, 0, sizeof(**queue_entry));
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qla4xxx_advance_req_ring_ptr(ha);
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ha->req_q_count -= req_cnt;
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return QLA_SUCCESS;
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}
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return QLA_ERROR;
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}
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/**
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* qla4xxx_send_marker_iocb - issues marker iocb to HBA
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* @ha: Pointer to host adapter structure.
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* @ddb_entry: Pointer to device database entry
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* @lun: SCSI LUN
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* @marker_type: marker identifier
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*
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* This routine issues a marker IOCB.
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**/
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int qla4xxx_send_marker_iocb(struct scsi_qla_host *ha,
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struct ddb_entry *ddb_entry, uint64_t lun, uint16_t mrkr_mod)
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{
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struct qla4_marker_entry *marker_entry;
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unsigned long flags = 0;
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uint8_t status = QLA_SUCCESS;
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/* Acquire hardware specific lock */
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spin_lock_irqsave(&ha->hardware_lock, flags);
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/* Get pointer to the queue entry for the marker */
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if (qla4xxx_get_req_pkt(ha, (struct queue_entry **) &marker_entry) !=
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QLA_SUCCESS) {
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status = QLA_ERROR;
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goto exit_send_marker;
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}
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/* Put the marker in the request queue */
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marker_entry->hdr.entryType = ET_MARKER;
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marker_entry->hdr.entryCount = 1;
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marker_entry->target = cpu_to_le16(ddb_entry->fw_ddb_index);
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marker_entry->modifier = cpu_to_le16(mrkr_mod);
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int_to_scsilun(lun, &marker_entry->lun);
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wmb();
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/* Tell ISP it's got a new I/O request */
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ha->isp_ops->queue_iocb(ha);
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exit_send_marker:
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spin_unlock_irqrestore(&ha->hardware_lock, flags);
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return status;
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}
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static struct continuation_t1_entry *
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qla4xxx_alloc_cont_entry(struct scsi_qla_host *ha)
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{
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struct continuation_t1_entry *cont_entry;
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cont_entry = (struct continuation_t1_entry *)ha->request_ptr;
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qla4xxx_advance_req_ring_ptr(ha);
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/* Load packet defaults */
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cont_entry->hdr.entryType = ET_CONTINUE;
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cont_entry->hdr.entryCount = 1;
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cont_entry->hdr.systemDefined = (uint8_t) cpu_to_le16(ha->request_in);
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return cont_entry;
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}
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static uint16_t qla4xxx_calc_request_entries(uint16_t dsds)
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{
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uint16_t iocbs;
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iocbs = 1;
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if (dsds > COMMAND_SEG) {
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iocbs += (dsds - COMMAND_SEG) / CONTINUE_SEG;
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if ((dsds - COMMAND_SEG) % CONTINUE_SEG)
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iocbs++;
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}
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return iocbs;
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}
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static void qla4xxx_build_scsi_iocbs(struct srb *srb,
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struct command_t3_entry *cmd_entry,
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uint16_t tot_dsds)
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{
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struct scsi_qla_host *ha;
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uint16_t avail_dsds;
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struct data_seg_a64 *cur_dsd;
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struct scsi_cmnd *cmd;
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struct scatterlist *sg;
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int i;
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cmd = srb->cmd;
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ha = srb->ha;
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if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) {
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/* No data being transferred */
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cmd_entry->ttlByteCnt = __constant_cpu_to_le32(0);
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return;
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}
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avail_dsds = COMMAND_SEG;
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cur_dsd = (struct data_seg_a64 *) & (cmd_entry->dataseg[0]);
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scsi_for_each_sg(cmd, sg, tot_dsds, i) {
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dma_addr_t sle_dma;
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/* Allocate additional continuation packets? */
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if (avail_dsds == 0) {
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struct continuation_t1_entry *cont_entry;
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cont_entry = qla4xxx_alloc_cont_entry(ha);
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cur_dsd =
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(struct data_seg_a64 *)
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&cont_entry->dataseg[0];
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avail_dsds = CONTINUE_SEG;
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}
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sle_dma = sg_dma_address(sg);
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cur_dsd->base.addrLow = cpu_to_le32(LSDW(sle_dma));
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cur_dsd->base.addrHigh = cpu_to_le32(MSDW(sle_dma));
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cur_dsd->count = cpu_to_le32(sg_dma_len(sg));
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avail_dsds--;
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cur_dsd++;
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}
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}
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void qla4_83xx_queue_iocb(struct scsi_qla_host *ha)
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{
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writel(ha->request_in, &ha->qla4_83xx_reg->req_q_in);
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readl(&ha->qla4_83xx_reg->req_q_in);
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}
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void qla4_83xx_complete_iocb(struct scsi_qla_host *ha)
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{
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writel(ha->response_out, &ha->qla4_83xx_reg->rsp_q_out);
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readl(&ha->qla4_83xx_reg->rsp_q_out);
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}
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/**
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* qla4_82xx_queue_iocb - Tell ISP it's got new request(s)
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* @ha: pointer to host adapter structure.
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*
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* This routine notifies the ISP that one or more new request
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* queue entries have been placed on the request queue.
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**/
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void qla4_82xx_queue_iocb(struct scsi_qla_host *ha)
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{
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uint32_t dbval = 0;
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dbval = 0x14 | (ha->func_num << 5);
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dbval = dbval | (0 << 8) | (ha->request_in << 16);
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qla4_82xx_wr_32(ha, ha->nx_db_wr_ptr, ha->request_in);
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}
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/**
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* qla4_82xx_complete_iocb - Tell ISP we're done with response(s)
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* @ha: pointer to host adapter structure.
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*
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* This routine notifies the ISP that one or more response/completion
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* queue entries have been processed by the driver.
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* This also clears the interrupt.
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**/
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void qla4_82xx_complete_iocb(struct scsi_qla_host *ha)
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{
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writel(ha->response_out, &ha->qla4_82xx_reg->rsp_q_out);
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readl(&ha->qla4_82xx_reg->rsp_q_out);
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}
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/**
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* qla4xxx_queue_iocb - Tell ISP it's got new request(s)
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* @ha: pointer to host adapter structure.
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*
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* This routine is notifies the ISP that one or more new request
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* queue entries have been placed on the request queue.
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**/
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void qla4xxx_queue_iocb(struct scsi_qla_host *ha)
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{
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writel(ha->request_in, &ha->reg->req_q_in);
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readl(&ha->reg->req_q_in);
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}
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/**
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* qla4xxx_complete_iocb - Tell ISP we're done with response(s)
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* @ha: pointer to host adapter structure.
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*
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* This routine is notifies the ISP that one or more response/completion
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* queue entries have been processed by the driver.
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* This also clears the interrupt.
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**/
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void qla4xxx_complete_iocb(struct scsi_qla_host *ha)
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{
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writel(ha->response_out, &ha->reg->rsp_q_out);
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readl(&ha->reg->rsp_q_out);
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}
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/**
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* qla4xxx_send_command_to_isp - issues command to HBA
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* @ha: pointer to host adapter structure.
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* @srb: pointer to SCSI Request Block to be sent to ISP
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*
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* This routine is called by qla4xxx_queuecommand to build an ISP
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* command and pass it to the ISP for execution.
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**/
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int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb)
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{
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struct scsi_cmnd *cmd = srb->cmd;
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struct ddb_entry *ddb_entry;
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struct command_t3_entry *cmd_entry;
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int nseg;
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uint16_t tot_dsds;
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uint16_t req_cnt;
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unsigned long flags;
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uint32_t index;
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/* Get real lun and adapter */
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ddb_entry = srb->ddb;
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tot_dsds = 0;
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/* Acquire hardware specific lock */
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spin_lock_irqsave(&ha->hardware_lock, flags);
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index = (uint32_t)cmd->request->tag;
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/*
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* Check to see if adapter is online before placing request on
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* request queue. If a reset occurs and a request is in the queue,
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* the firmware will still attempt to process the request, retrieving
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* garbage for pointers.
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*/
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if (!test_bit(AF_ONLINE, &ha->flags)) {
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DEBUG2(printk("scsi%ld: %s: Adapter OFFLINE! "
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"Do not issue command.\n",
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ha->host_no, __func__));
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goto queuing_error;
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}
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/* Calculate the number of request entries needed. */
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nseg = scsi_dma_map(cmd);
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if (nseg < 0)
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goto queuing_error;
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tot_dsds = nseg;
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req_cnt = qla4xxx_calc_request_entries(tot_dsds);
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if (!qla4xxx_space_in_req_ring(ha, req_cnt))
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goto queuing_error;
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/* total iocbs active */
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if ((ha->iocb_cnt + req_cnt) >= ha->iocb_hiwat)
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goto queuing_error;
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/* Build command packet */
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cmd_entry = (struct command_t3_entry *) ha->request_ptr;
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memset(cmd_entry, 0, sizeof(struct command_t3_entry));
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cmd_entry->hdr.entryType = ET_COMMAND;
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cmd_entry->handle = cpu_to_le32(index);
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cmd_entry->target = cpu_to_le16(ddb_entry->fw_ddb_index);
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int_to_scsilun(cmd->device->lun, &cmd_entry->lun);
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cmd_entry->ttlByteCnt = cpu_to_le32(scsi_bufflen(cmd));
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memcpy(cmd_entry->cdb, cmd->cmnd, cmd->cmd_len);
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cmd_entry->dataSegCnt = cpu_to_le16(tot_dsds);
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cmd_entry->hdr.entryCount = req_cnt;
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/* Set data transfer direction control flags
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* NOTE: Look at data_direction bits iff there is data to be
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* transferred, as the data direction bit is sometimed filled
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* in when there is no data to be transferred */
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cmd_entry->control_flags = CF_NO_DATA;
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if (scsi_bufflen(cmd)) {
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if (cmd->sc_data_direction == DMA_TO_DEVICE)
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cmd_entry->control_flags = CF_WRITE;
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else if (cmd->sc_data_direction == DMA_FROM_DEVICE)
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cmd_entry->control_flags = CF_READ;
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ha->bytes_xfered += scsi_bufflen(cmd);
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if (ha->bytes_xfered & ~0xFFFFF){
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ha->total_mbytes_xferred += ha->bytes_xfered >> 20;
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ha->bytes_xfered &= 0xFFFFF;
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}
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}
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/* Set tagged queueing control flags */
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cmd_entry->control_flags |= CF_SIMPLE_TAG;
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qla4xxx_advance_req_ring_ptr(ha);
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qla4xxx_build_scsi_iocbs(srb, cmd_entry, tot_dsds);
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wmb();
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srb->cmd->host_scribble = (unsigned char *)(unsigned long)index;
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/* update counters */
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srb->state = SRB_ACTIVE_STATE;
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srb->flags |= SRB_DMA_VALID;
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/* Track IOCB used */
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ha->iocb_cnt += req_cnt;
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srb->iocb_cnt = req_cnt;
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ha->req_q_count -= req_cnt;
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ha->isp_ops->queue_iocb(ha);
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spin_unlock_irqrestore(&ha->hardware_lock, flags);
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return QLA_SUCCESS;
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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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spin_unlock_irqrestore(&ha->hardware_lock, flags);
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return QLA_ERROR;
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}
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int qla4xxx_send_passthru0(struct iscsi_task *task)
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{
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struct passthru0 *passthru_iocb;
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struct iscsi_session *sess = task->conn->session;
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struct ddb_entry *ddb_entry = sess->dd_data;
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struct scsi_qla_host *ha = ddb_entry->ha;
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struct ql4_task_data *task_data = task->dd_data;
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uint16_t ctrl_flags = 0;
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unsigned long flags;
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int ret = QLA_ERROR;
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spin_lock_irqsave(&ha->hardware_lock, flags);
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task_data->iocb_req_cnt = 1;
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/* Put the IOCB on the request queue */
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if (!qla4xxx_space_in_req_ring(ha, task_data->iocb_req_cnt))
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goto queuing_error;
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passthru_iocb = (struct passthru0 *) ha->request_ptr;
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memset(passthru_iocb, 0, sizeof(struct passthru0));
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passthru_iocb->hdr.entryType = ET_PASSTHRU0;
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passthru_iocb->hdr.systemDefined = SD_ISCSI_PDU;
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passthru_iocb->hdr.entryCount = task_data->iocb_req_cnt;
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passthru_iocb->handle = task->itt;
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passthru_iocb->target = cpu_to_le16(ddb_entry->fw_ddb_index);
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passthru_iocb->timeout = cpu_to_le16(PT_DEFAULT_TIMEOUT);
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/* Setup the out & in DSDs */
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if (task_data->req_len) {
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memcpy((uint8_t *)task_data->req_buffer +
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sizeof(struct iscsi_hdr), task->data, task->data_count);
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ctrl_flags |= PT_FLAG_SEND_BUFFER;
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passthru_iocb->out_dsd.base.addrLow =
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cpu_to_le32(LSDW(task_data->req_dma));
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passthru_iocb->out_dsd.base.addrHigh =
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cpu_to_le32(MSDW(task_data->req_dma));
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passthru_iocb->out_dsd.count =
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cpu_to_le32(task->data_count +
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sizeof(struct iscsi_hdr));
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}
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if (task_data->resp_len) {
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passthru_iocb->in_dsd.base.addrLow =
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cpu_to_le32(LSDW(task_data->resp_dma));
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passthru_iocb->in_dsd.base.addrHigh =
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cpu_to_le32(MSDW(task_data->resp_dma));
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passthru_iocb->in_dsd.count =
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cpu_to_le32(task_data->resp_len);
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}
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ctrl_flags |= (PT_FLAG_ISCSI_PDU | PT_FLAG_WAIT_4_RESPONSE);
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passthru_iocb->control_flags = cpu_to_le16(ctrl_flags);
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/* Update the request pointer */
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qla4xxx_advance_req_ring_ptr(ha);
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wmb();
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/* Track IOCB used */
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ha->iocb_cnt += task_data->iocb_req_cnt;
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ha->req_q_count -= task_data->iocb_req_cnt;
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ha->isp_ops->queue_iocb(ha);
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ret = QLA_SUCCESS;
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queuing_error:
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spin_unlock_irqrestore(&ha->hardware_lock, flags);
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return ret;
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}
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static struct mrb *qla4xxx_get_new_mrb(struct scsi_qla_host *ha)
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{
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struct mrb *mrb;
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mrb = kzalloc(sizeof(*mrb), GFP_KERNEL);
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if (!mrb)
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return mrb;
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mrb->ha = ha;
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return mrb;
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}
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static int qla4xxx_send_mbox_iocb(struct scsi_qla_host *ha, struct mrb *mrb,
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uint32_t *in_mbox)
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{
|
|
int rval = QLA_SUCCESS;
|
|
uint32_t i;
|
|
unsigned long flags;
|
|
uint32_t index = 0;
|
|
|
|
/* Acquire hardware specific lock */
|
|
spin_lock_irqsave(&ha->hardware_lock, flags);
|
|
|
|
/* Get pointer to the queue entry for the marker */
|
|
rval = qla4xxx_get_req_pkt(ha, (struct queue_entry **) &(mrb->mbox));
|
|
if (rval != QLA_SUCCESS)
|
|
goto exit_mbox_iocb;
|
|
|
|
index = ha->mrb_index;
|
|
/* get valid mrb index*/
|
|
for (i = 0; i < MAX_MRB; i++) {
|
|
index++;
|
|
if (index == MAX_MRB)
|
|
index = 1;
|
|
if (ha->active_mrb_array[index] == NULL) {
|
|
ha->mrb_index = index;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mrb->iocb_cnt = 1;
|
|
ha->active_mrb_array[index] = mrb;
|
|
mrb->mbox->handle = index;
|
|
mrb->mbox->hdr.entryType = ET_MBOX_CMD;
|
|
mrb->mbox->hdr.entryCount = mrb->iocb_cnt;
|
|
memcpy(mrb->mbox->in_mbox, in_mbox, 32);
|
|
mrb->mbox_cmd = in_mbox[0];
|
|
wmb();
|
|
|
|
ha->iocb_cnt += mrb->iocb_cnt;
|
|
ha->isp_ops->queue_iocb(ha);
|
|
exit_mbox_iocb:
|
|
spin_unlock_irqrestore(&ha->hardware_lock, flags);
|
|
return rval;
|
|
}
|
|
|
|
int qla4xxx_ping_iocb(struct scsi_qla_host *ha, uint32_t options,
|
|
uint32_t payload_size, uint32_t pid, uint8_t *ipaddr)
|
|
{
|
|
uint32_t in_mbox[8];
|
|
struct mrb *mrb = NULL;
|
|
int rval = QLA_SUCCESS;
|
|
|
|
memset(in_mbox, 0, sizeof(in_mbox));
|
|
|
|
mrb = qla4xxx_get_new_mrb(ha);
|
|
if (!mrb) {
|
|
DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: fail to get new mrb\n",
|
|
__func__));
|
|
rval = QLA_ERROR;
|
|
goto exit_ping;
|
|
}
|
|
|
|
in_mbox[0] = MBOX_CMD_PING;
|
|
in_mbox[1] = options;
|
|
memcpy(&in_mbox[2], &ipaddr[0], 4);
|
|
memcpy(&in_mbox[3], &ipaddr[4], 4);
|
|
memcpy(&in_mbox[4], &ipaddr[8], 4);
|
|
memcpy(&in_mbox[5], &ipaddr[12], 4);
|
|
in_mbox[6] = payload_size;
|
|
|
|
mrb->pid = pid;
|
|
rval = qla4xxx_send_mbox_iocb(ha, mrb, in_mbox);
|
|
|
|
if (rval != QLA_SUCCESS)
|
|
goto exit_ping;
|
|
|
|
return rval;
|
|
exit_ping:
|
|
kfree(mrb);
|
|
return rval;
|
|
}
|