From: Anil Gurumurthy <anil.gurumurthy@xxxxxxxxxx>
This patch adds files to enable NVMe Target Support
Signed-off-by: Anil Gurumurthy <anil.gurumurthy@xxxxxxxxxx>
Signed-off-by: Giridhar Malavali <giridhar.malavali@xxxxxxxxxx>
Signed-off-by: Darren Trapp <darren.trapp@xxxxxxxxxx>
Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
---
drivers/scsi/qla2xxx/qla_nvmet.c | 795 +++++++++++++++++++++++++++++++++++++++
drivers/scsi/qla2xxx/qla_nvmet.h | 129 +++++++
2 files changed, 924 insertions(+)
create mode 100644 drivers/scsi/qla2xxx/qla_nvmet.c
create mode 100644 drivers/scsi/qla2xxx/qla_nvmet.h
diff --git a/drivers/scsi/qla2xxx/qla_nvmet.c b/drivers/scsi/qla2xxx/qla_nvmet.c
new file mode 100644
index 000000000000..caf72d5d627b
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_nvmet.c
@@ -0,0 +1,795 @@
+/*
+ * QLogic Fibre Channel HBA Driver
+ * Copyright (c) 2003-2017 QLogic Corporation
+ *
+ * See LICENSE.qla2xxx for copyright and licensing details.
+ */
+
+#include <linux/scatterlist.h>
+#include <linux/delay.h>
+#include <linux/nvme.h>
+#include <linux/nvme-fc.h>
+
+#include "qla_nvme.h"
+#include "qla_nvmet.h"
+
+static void qla_nvmet_send_resp_ctio(struct qla_qpair *qpair,
+ struct qla_nvmet_cmd *cmd, struct nvmefc_tgt_fcp_req *rsp);
+static void qla_nvmet_send_abts_ctio(struct scsi_qla_host *vha,
+ struct abts_recv_from_24xx *abts, bool flag);
+
+/*
+ * qla_nvmet_targetport_delete -
+ * Invoked by the nvmet to indicate that the target port has
+ * been deleted
+ */
+static void
+qla_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
+{
+ struct qla_nvmet_tgtport *tport = targetport->private;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return;
+
+ complete(&tport->tport_del);
+}
+
+/*
+ * qlt_nvmet_ls_done -
+ * Invoked by the firmware interface to indicate the completion
+ * of an LS cmd
+ * Free all associated resources of the LS cmd
+ */
+static void qlt_nvmet_ls_done(void *ptr, int res)
+{
+ struct srb *sp = ptr;
+ struct srb_iocb *nvme = &sp->u.iocb_cmd;
+ struct nvmefc_tgt_ls_req *rsp = nvme->u.nvme.desc;
+ struct qla_nvmet_cmd *tgt_cmd = nvme->u.nvme.cmd;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return;
+
+ ql_dbg(ql_dbg_nvme, sp->vha, 0x11001,
+ "%s: sp %p vha %p, rsp %p, cmd %p\n", __func__,
+ sp, sp->vha, nvme->u.nvme.desc, nvme->u.nvme.cmd);
+
+ rsp->done(rsp);
+
+ /* Free tgt_cmd */
+ kfree(tgt_cmd->buf);
+ kfree(tgt_cmd);
+ qla2x00_rel_sp(sp);
+}
+
+/*
+ * qla_nvmet_ls_rsp -
+ * Invoked by the nvme-t to complete the LS req.
+ * Prepare and send a response CTIO to the firmware.
+ */
+static int
+qla_nvmet_ls_rsp(struct nvmet_fc_target_port *tgtport,
+ struct nvmefc_tgt_ls_req *rsp)
+{
+ struct qla_nvmet_cmd *tgt_cmd =
+ container_of(rsp, struct qla_nvmet_cmd, cmd.ls_req);
+ struct scsi_qla_host *vha = tgt_cmd->vha;
+ struct srb_iocb *nvme;
+ int rval = QLA_FUNCTION_FAILED;
+ srb_t *sp;
+
+ ql_dbg(ql_dbg_nvme + ql_dbg_buffer, vha, 0x11002,
+ "Dumping the NVMET-LS response buffer\n");
+ ql_dump_buffer(ql_dbg_nvme + ql_dbg_buffer, vha, 0x2075,
+ (uint8_t *)rsp->rspbuf, rsp->rsplen);
+
+ /* Alloc SRB structure */
+ sp = qla2x00_get_sp(vha, NULL, GFP_ATOMIC);
+ if (!sp) {
+ ql_log(ql_log_info, vha, 0x11003, "Failed to allocate SRB\n");
+ return -ENOMEM;
+ }
+
+ sp->type = SRB_NVMET_LS;
+ sp->done = qlt_nvmet_ls_done;
+ sp->vha = vha;
+ sp->fcport = tgt_cmd->fcport;
+
+ nvme = &sp->u.iocb_cmd;
+ nvme->u.nvme.rsp_dma = rsp->rspdma;
+ nvme->u.nvme.rsp_len = rsp->rsplen;
+ nvme->u.nvme.exchange_address = tgt_cmd->atio.u.pt_ls4.exchange_address;
+ nvme->u.nvme.nport_handle = tgt_cmd->atio.u.pt_ls4.nport_handle;
+ nvme->u.nvme.vp_index = tgt_cmd->atio.u.pt_ls4.vp_index;
+
+ nvme->u.nvme.cmd = tgt_cmd; /* To be freed */
+ nvme->u.nvme.desc = rsp; /* Call back to nvmet */
+
+ rval = qla2x00_start_sp(sp);
+ if (rval != QLA_SUCCESS) {
+ ql_log(ql_log_warn, vha, 0x11004,
+ "qla2x00_start_sp failed = %d\n", rval);
+ return rval;
+ }
+
+ return 0;
+}
+
+/*
+ * qla_nvmet_fcp_op -
+ * Invoked by the nvme-t to complete the IO.
+ * Prepare and send a response CTIO to the firmware.
+ */
+static int
+qla_nvmet_fcp_op(struct nvmet_fc_target_port *tgtport,
+ struct nvmefc_tgt_fcp_req *rsp)
+{
+ struct qla_nvmet_cmd *tgt_cmd =
+ container_of(rsp, struct qla_nvmet_cmd, cmd.fcp_req);
+ struct scsi_qla_host *vha = tgt_cmd->vha;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return 0;
+
+ /* Prepare and send CTIO 82h */
+ qla_nvmet_send_resp_ctio(vha->qpair, tgt_cmd, rsp);
+
+ return 0;
+}
+
+/*
+ * qla_nvmet_fcp_abort_done
+ * free up the used resources
+ */
+static void qla_nvmet_fcp_abort_done(void *ptr, int res)
+{
+ srb_t *sp = ptr;
+
+ qla2x00_rel_sp(sp);
+}
+
+/*
+ * qla_nvmet_fcp_abort -
+ * Invoked by the nvme-t to abort an IO
+ * Send an abort to the firmware
+ */
+static void
+qla_nvmet_fcp_abort(struct nvmet_fc_target_port *tgtport,
+ struct nvmefc_tgt_fcp_req *req)
+{
+ struct qla_nvmet_cmd *tgt_cmd =
+ container_of(req, struct qla_nvmet_cmd, cmd.fcp_req);
+ struct scsi_qla_host *vha = tgt_cmd->vha;
+ struct qla_hw_data *ha = vha->hw;
+ srb_t *sp;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return;
+
+ /* Alloc SRB structure */
+ sp = qla2x00_get_sp(vha, NULL, GFP_KERNEL);
+ if (!sp) {
+ ql_log(ql_log_info, vha, 0x11005, "Failed to allocate SRB\n");
+ return;
+ }
+
+ sp->type = SRB_NVMET_SEND_ABTS;
+ sp->done = qla_nvmet_fcp_abort_done;
+ sp->vha = vha;
+ sp->fcport = tgt_cmd->fcport;
+
+ ha->isp_ops->abort_command(sp);
+
+}
+
+/*
+ * qla_nvmet_fcp_req_release -
+ * Delete the cmd from the list and free the cmd
+ */
+static void
+qla_nvmet_fcp_req_release(struct nvmet_fc_target_port *tgtport,
+ struct nvmefc_tgt_fcp_req *rsp)
+{
+ struct qla_nvmet_cmd *tgt_cmd =
+ container_of(rsp, struct qla_nvmet_cmd, cmd.fcp_req);
+ scsi_qla_host_t *vha = tgt_cmd->vha;
+ unsigned long flags;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return;
+
+ spin_lock_irqsave(&vha->cmd_list_lock, flags);
+ list_del(&tgt_cmd->cmd_list);
+ spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
+
+ kfree(tgt_cmd);
+}
+
+static struct nvmet_fc_target_template qla_nvmet_fc_transport = {
+ .targetport_delete = qla_nvmet_targetport_delete,
+ .xmt_ls_rsp = qla_nvmet_ls_rsp,
+ .fcp_op = qla_nvmet_fcp_op,
+ .fcp_abort = qla_nvmet_fcp_abort,
+ .fcp_req_release = qla_nvmet_fcp_req_release,
+ .max_hw_queues = 8,
+ .max_sgl_segments = 128,
+ .max_dif_sgl_segments = 64,
+ .dma_boundary = 0xFFFFFFFF,
+ .target_features = NVMET_FCTGTFEAT_READDATA_RSP,
+ .target_priv_sz = sizeof(struct nvme_private),
+};
+
+/*
+ * qla_nvmet_create_targetport -
+ * Create a targetport. Registers the template with the nvme-t
+ * layer
+ */
+int qla_nvmet_create_targetport(struct scsi_qla_host *vha)
+{
+ struct nvmet_fc_port_info pinfo;
+ struct qla_nvmet_tgtport *tport;
+ int error = 0;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return 0;
+
+ ql_dbg(ql_dbg_nvme, vha, 0xe081,
+ "Creating target port for :%p\n", vha);
+
+ memset(&pinfo, 0, (sizeof(struct nvmet_fc_port_info)));
+ pinfo.node_name = wwn_to_u64(vha->node_name);
+ pinfo.port_name = wwn_to_u64(vha->port_name);
+ pinfo.port_id = vha->d_id.b24;
+
+ error = nvmet_fc_register_targetport(&pinfo,
+ &qla_nvmet_fc_transport, &vha->hw->pdev->dev,
+ &vha->targetport);
+
+ if (error) {
+ ql_dbg(ql_dbg_nvme, vha, 0xe082,
+ "Cannot register NVME transport:%d\n", error);
+ return error;
+ }
+ tport = (struct qla_nvmet_tgtport *)vha->targetport->private;
+ tport->vha = vha;
+ ql_dbg(ql_dbg_nvme, vha, 0xe082,
+ " Registered NVME transport:%p WWPN:%llx\n",
+ tport, pinfo.port_name);
+ return 0;
+}
+
+/*
+ * qla_nvmet_delete -
+ * Delete a targetport.
+ */
+int qla_nvmet_delete(struct scsi_qla_host *vha)
+{
+ struct qla_nvmet_tgtport *tport;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return 0;
+
+ if (!vha->flags.nvmet_enabled)
+ return 0;
+ if (vha->targetport) {
+ tport = (struct qla_nvmet_tgtport *)vha->targetport->private;
+
+ ql_dbg(ql_dbg_nvme, vha, 0xe083,
+ "Deleting target port :%p\n", tport);
+ init_completion(&tport->tport_del);
+ nvmet_fc_unregister_targetport(vha->targetport);
+ wait_for_completion_timeout(&tport->tport_del, 5);
+
+ nvmet_release_sessions(vha);
+ }
+ return 0;
+}
+
+/*
+ * qla_nvmet_handle_ls -
+ * Handle a link service request from the initiator.
+ * Get the LS payload from the ATIO queue, invoke
+ * nvmet_fc_rcv_ls_req to pass the LS req to nvmet.
+ */
+int qla_nvmet_handle_ls(struct scsi_qla_host *vha,
+ struct pt_ls4_rx_unsol *pt_ls4, void *buf)
+{
+ struct qla_nvmet_cmd *tgt_cmd;
+ uint32_t size;
+ int ret;
+ uint32_t look_up_sid;
+ fc_port_t *sess = NULL;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return 0;
+
+ look_up_sid = pt_ls4->s_id[2] << 16 |
+ pt_ls4->s_id[1] << 8 | pt_ls4->s_id[0];
+
+ ql_dbg(ql_dbg_nvme, vha, 0x11005,
+ "%s - Look UP sid: %#x\n", __func__, look_up_sid);
+
+ sess = qla_nvmet_find_sess_by_s_id(vha, look_up_sid);
+ if (unlikely(!sess))
+ WARN_ON(1);
+
+ size = cpu_to_le16(pt_ls4->desc_len) + 8;
+
+ tgt_cmd = kzalloc(sizeof(struct qla_nvmet_cmd), GFP_ATOMIC);
+ if (tgt_cmd == NULL)
+ return -ENOMEM;
+
+ tgt_cmd->vha = vha;
+ tgt_cmd->ox_id = pt_ls4->ox_id;
+ tgt_cmd->buf = buf;
+ /* Store the received nphdl, rx_exh_addr etc */
+ memcpy(&tgt_cmd->atio.u.pt_ls4, pt_ls4, sizeof(struct pt_ls4_rx_unsol));
+ tgt_cmd->fcport = sess;
+
+ ql_dbg(ql_dbg_nvme + ql_dbg_buffer, vha, 0x11006,
+ "Dumping the PURLS-ATIO request\n");
+ ql_dump_buffer(ql_dbg_nvme + ql_dbg_buffer, vha, 0x2075,
+ (uint8_t *)pt_ls4, sizeof(struct pt_ls4_rx_unsol));
+
+ ql_dbg(ql_dbg_nvme, vha, 0x11007,
+ "Sending LS to nvmet buf: %p, len: %#x\n", buf, size);
+
+ ret = nvmet_fc_rcv_ls_req(vha->targetport,
+ &tgt_cmd->cmd.ls_req, buf, size);
+
+ if (ret == 0) {
+ ql_dbg(ql_dbg_nvme, vha, 0x11008,
+ "LS req handled successfully\n");
+ return 0;
+ }
+
+ ql_log(ql_log_warn, vha, 0x11009, "LS req failed\n");
+
+ return ret;
+}
+
+/*
+ * qla_nvmet_process_cmd -
+ * Handle NVME cmd request from the initiator.
+ * Get the NVME payload from the ATIO queue, invoke
+ * nvmet_fc_rcv_ls_req to pass the LS req to nvmet.
+ * On a failure send an abts to the initiator?
+ */
+int qla_nvmet_process_cmd(struct scsi_qla_host *vha,
+ struct qla_nvmet_cmd *tgt_cmd)
+{
+ int ret;
+ struct atio7_nvme_cmnd *nvme_cmd;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return 0;
+
+ nvme_cmd = (struct atio7_nvme_cmnd *)&tgt_cmd->nvme_cmd_iu;
+
+ ret = nvmet_fc_rcv_fcp_req(vha->targetport, &tgt_cmd->cmd.fcp_req,
+ nvme_cmd, tgt_cmd->cmd_len);
+ if (ret != 0) {
+ ql_log(ql_log_warn, vha, 0x1100a,
+ "%s-%d - Failed (ret: %#x) to process NVME command\n",
+ __func__, __LINE__, ret);
+ /* Send ABTS to initator ? */
+ }
+ return 0;
+}
+
+/*
+ * qla_nvmet_handle_abts
+ * Handle an abort from the initiator
+ * Invoke nvmet_fc_rcv_fcp_abort to pass the abts to the nvmet
+ */
+int qla_nvmet_handle_abts(struct scsi_qla_host *vha,
+ struct abts_recv_from_24xx *abts)
+{
+ uint16_t ox_id = cpu_to_be16(abts->fcp_hdr_le.ox_id);
+ unsigned long flags;
+ struct qla_nvmet_cmd *cmd = NULL;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return 0;
+
+ /* Retrieve the cmd from cmd list */
+ spin_lock_irqsave(&vha->cmd_list_lock, flags);
+ list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
+ if (cmd->ox_id == ox_id)
+ break; /* Found the cmd */
+ }
+ spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
+ if (!cmd) {
+ ql_log(ql_log_warn, vha, 0x1100b,
+ "%s-%d - Command not found\n", __func__, __LINE__);
+ /* Send a RJT */
+ qla_nvmet_send_abts_ctio(vha, abts, 0);
+ return 0;
+ }
+
+ nvmet_fc_rcv_fcp_abort(vha->targetport, &cmd->cmd.fcp_req);
+ /* Send an ACC */
+ qla_nvmet_send_abts_ctio(vha, abts, 1);
+
+ return 0;
+}
+
+/*
+ * qla_nvmet_abts_done
+ * Complete the cmd back to the nvme-t and
+ * free up the used resources
+ */
+static void qla_nvmet_abts_done(void *ptr, int res)
+{
+ srb_t *sp = ptr;
+
+ if (!IS_ENABLED(CONFIG_NVME_TARGET_FC))
+ return;
+
+ qla2x00_rel_sp(sp);
+}
+/*
+ * qla_nvmet_fcp_done
+ * Complete the cmd back to the nvme-t and
+ * free up the used resources
+ */
+static void qla_nvmet_fcp_done(void *ptr, int res)
+{
+ srb_t *sp = ptr;
+ struct nvmefc_tgt_fcp_req *rsp;
+
+ rsp = sp->u.iocb_cmd.u.nvme.desc;
+
+ if (res) {
+ rsp->fcp_error = NVME_SC_SUCCESS;
+ if (rsp->op == NVMET_FCOP_RSP)
+ rsp->transferred_length = 0;
+ else
+ rsp->transferred_length = rsp->transfer_length;
+ } else {
+ rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
+ rsp->transferred_length = 0;
+ }
+ rsp->done(rsp);
+ qla2x00_rel_sp(sp);
+}
+
+/*
+ * qla_nvmet_send_resp_ctio
+ * Send the response CTIO to the firmware
+ */
+static void qla_nvmet_send_resp_ctio(struct qla_qpair *qpair,
+ struct qla_nvmet_cmd *cmd, struct nvmefc_tgt_fcp_req *rsp_buf)
+{
+ struct atio_from_isp *atio = &cmd->atio;
+ struct ctio_nvme_to_27xx *ctio;
+ struct scsi_qla_host *vha = cmd->vha;
+ struct qla_hw_data *ha = vha->hw;
+ struct fcp_hdr *fchdr = &atio->u.nvme_isp27.fcp_hdr;
+ srb_t *sp;
+ unsigned long flags;
+ uint16_t temp, c_flags = 0;
+ struct req_que *req = vha->hw->req_q_map[0];
+ uint32_t req_cnt = 1;
+ uint32_t *cur_dsd;
+ uint16_t avail_dsds;
+ uint16_t tot_dsds, i, cnt;
+ struct scatterlist *sgl, *sg;
+
+ spin_lock_irqsave(&ha->hardware_lock, flags);
+
+ /* Alloc SRB structure */
+ sp = qla2x00_get_sp(vha, cmd->fcport, GFP_ATOMIC);
+ if (!sp) {
+ ql_log(ql_log_info, vha, 0x1100c, "Failed to allocate SRB\n");
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ return;
+ }
+
+ sp->type = SRB_NVMET_FCP;
+ sp->name = "nvmet_fcp";
+ sp->done = qla_nvmet_fcp_done;
+ sp->u.iocb_cmd.u.nvme.desc = rsp_buf;
+ sp->u.iocb_cmd.u.nvme.cmd = cmd;
+
+ ctio = (struct ctio_nvme_to_27xx *)qla2x00_alloc_iocbs(vha, sp);
+ if (!ctio) {
+ ql_dbg(ql_dbg_nvme, vha, 0x3067,
+ "qla2x00t(%ld): %s failed: unable to allocate request packet",
+ vha->host_no, __func__);
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+ return;
+ }
+
+ ctio->entry_type = CTIO_NVME;
+ ctio->entry_count = 1;
+ ctio->handle = sp->handle;
+ ctio->nport_handle = cpu_to_le16(cmd->fcport->loop_id);
+ ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
+ ctio->vp_index = vha->vp_idx;
+ ctio->initiator_id[0] = fchdr->s_id[2];
+ ctio->initiator_id[1] = fchdr->s_id[1];
+ ctio->initiator_id[2] = fchdr->s_id[0];
+ ctio->exchange_addr = atio->u.nvme_isp27.exchange_addr;
+ temp = be16_to_cpu(fchdr->ox_id);
+ ctio->ox_id = cpu_to_le16(temp);
+ tot_dsds = ctio->dseg_count = cpu_to_le16(rsp_buf->sg_cnt);
+ c_flags = atio->u.nvme_isp27.attr << 9;
+
+ if ((ctio->dseg_count > 1) && (rsp_buf->op != NVMET_FCOP_RSP)) {
+ /* Check for additional continuation IOCB space */
+ req_cnt = qla24xx_calc_iocbs(vha, ctio->dseg_count);
+ ctio->entry_count = req_cnt;
+
+ if (req->cnt < (req_cnt + 2)) {
+ cnt = (uint16_t)RD_REG_DWORD_RELAXED(req->req_q_out);
+
+ if (req->ring_index < cnt)
+ req->cnt = cnt - req->ring_index;
+ else
+ req->cnt = req->length -
+ (req->ring_index - cnt);
+
+ if (unlikely(req->cnt < (req_cnt + 2))) {
+ ql_log(ql_log_warn, vha, 0xfff,
+ "Running out of IOCB space for continuation IOCBs\n");
+ goto err_exit;
+ }
+ }
+ }
+
+ switch (rsp_buf->op) {
+ case NVMET_FCOP_READDATA:
+ case NVMET_FCOP_READDATA_RSP:
+ /* Populate the CTIO resp with the SGL present in the rsp */
+ ql_dbg(ql_dbg_nvme, vha, 0x1100c,
+ "op: %#x, ox_id=%x c_flags=%x transfer_length: %#x req_cnt: %#x, tot_dsds: %#x\n",
+ rsp_buf->op, ctio->ox_id, c_flags,
+ rsp_buf->transfer_length, req_cnt, tot_dsds);
+
+ avail_dsds = 1;
+ cur_dsd = (uint32_t *)
+ &ctio->u.nvme_status_mode0.dsd0[0];
+ sgl = rsp_buf->sg;
+
+ /* Load data segments */
+ for_each_sg(sgl, sg, tot_dsds, i) {
+ dma_addr_t sle_dma;
+ cont_a64_entry_t *cont_pkt;
+
+ /* Allocate additional continuation packets? */
+ if (avail_dsds == 0) {
+ /*
+ * Five DSDs are available in the Cont
+ * Type 1 IOCB.
+ */
+
+ /* Adjust ring index */
+ req->ring_index++;
+ if (req->ring_index == req->length) {
+ req->ring_index = 0;
+ req->ring_ptr = req->ring;
+ } else {
+ req->ring_ptr++;
+ }
+ cont_pkt = (cont_a64_entry_t *)
+ req->ring_ptr;
+ *((uint32_t *)(&cont_pkt->entry_type)) =
+ cpu_to_le32(CONTINUE_A64_TYPE);
+
+ cur_dsd = (uint32_t *)
+ cont_pkt->dseg_0_address;
+ avail_dsds = 5;
+ }
+
+ sle_dma = sg_dma_address(sg);
+ *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
+ avail_dsds--;
+ }
+
+ ctio->u.nvme_status_mode0.transfer_len =
+ cpu_to_le32(rsp_buf->transfer_length);
+ ctio->u.nvme_status_mode0.relative_offset =
+ cpu_to_le32(rsp_buf->offset);
+ ctio->flags = cpu_to_le16(c_flags | 0x2);
+
+ if (rsp_buf->op == NVMET_FCOP_READDATA_RSP) {
+ if (rsp_buf->rsplen == 12) {
+ ctio->flags |=
+ NVMET_CTIO_STS_MODE0 |
+ NVMET_CTIO_SEND_STATUS;
+ } else if (rsp_buf->rsplen == 32) {
+ struct nvme_fc_ersp_iu *ersp =
+ rsp_buf->rspaddr;
+ uint32_t iter = 4, *inbuf, *outbuf;
+
+ ctio->flags |=
+ NVMET_CTIO_STS_MODE1 |
+ NVMET_CTIO_SEND_STATUS;
+ inbuf = (uint32_t *)
+ &((uint8_t *)rsp_buf->rspaddr)[16];
+ outbuf = (uint32_t *)
+ ctio->u.nvme_status_mode1.nvme_comp_q_entry;
+ for (; iter; iter--)
+ *outbuf++ = cpu_to_be32(*inbuf++);
+
+ ctio->u.nvme_status_mode1.rsp_seq_num =
+ cpu_to_be32(ersp->rsn);
+ ctio->u.nvme_status_mode1.transfer_len =
+ cpu_to_be32(ersp->xfrd_len);
+ } else {
+ ql_log(ql_log_warn, vha, 0x1100d,
+ "unhandled resp len = %x\n", rsp_buf->rsplen);
+ }
+ }
+ break;
+
+ case NVMET_FCOP_WRITEDATA:
+ /* Send transfer rdy */
+ ql_dbg(ql_dbg_nvme, vha, 0x1100e,
+ "FCOP_WRITE: ox_id=%x c_flags=%x transfer_length: %#x req_cnt: %#x, tot_dsds: %#x\n",
+ ctio->ox_id, c_flags, rsp_buf->transfer_length,
+ req_cnt, tot_dsds);
+
+ ctio->flags = cpu_to_le16(c_flags | 0x1);
+
+ avail_dsds = 1;
+ cur_dsd = (uint32_t *)&ctio->u.nvme_status_mode0.dsd0[0];
+ sgl = rsp_buf->sg;
+
+ /* Load data segments */
+ for_each_sg(sgl, sg, tot_dsds, i) {
+ dma_addr_t sle_dma;
+ cont_a64_entry_t *cont_pkt;
+
+ /* Allocate additional continuation packets? */
+ if (avail_dsds == 0) {
+ /*
+ * Five DSDs are available in the Continuation
+ * Type 1 IOCB.
+ */
+
+ /* Adjust ring index */
+ req->ring_index++;
+ if (req->ring_index == req->length) {
+ req->ring_index = 0;
+ req->ring_ptr = req->ring;
+ } else {
+ req->ring_ptr++;
+ }
+ cont_pkt = (cont_a64_entry_t *)req->ring_ptr;
+ *((uint32_t *)(&cont_pkt->entry_type)) =
+ cpu_to_le32(CONTINUE_A64_TYPE);
+
+ cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;
+ avail_dsds = 5;
+ }
+
+ sle_dma = sg_dma_address(sg);
+ *cur_dsd++ = cpu_to_le32(LSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(MSD(sle_dma));
+ *cur_dsd++ = cpu_to_le32(sg_dma_len(sg));
+ avail_dsds--;
+ }
+
+ ctio->u.nvme_status_mode0.transfer_len =
+ cpu_to_le32(rsp_buf->transfer_length);
+ ctio->u.nvme_status_mode0.relative_offset =
+ cpu_to_le32(rsp_buf->offset);
+
+ break;
+ case NVMET_FCOP_RSP:
+ /* Send a response frame */
+ ctio->flags = cpu_to_le16(c_flags);
+ if (rsp_buf->rsplen == 12) {
+ ctio->flags |=
+ NVMET_CTIO_STS_MODE0 | NVMET_CTIO_SEND_STATUS;
+ } else if (rsp_buf->rsplen == 32) {
+ struct nvme_fc_ersp_iu *ersp = rsp_buf->rspaddr;
+ uint32_t iter = 4, *inbuf, *outbuf;
+
+ ctio->flags |=
+ NVMET_CTIO_STS_MODE1 | NVMET_CTIO_SEND_STATUS;
+ inbuf = (uint32_t *)
+ &((uint8_t *)rsp_buf->rspaddr)[16];
+ outbuf = (uint32_t *)
+ ctio->u.nvme_status_mode1.nvme_comp_q_entry;
+ for (; iter; iter--)
+ *outbuf++ = cpu_to_be32(*inbuf++);
+ ctio->u.nvme_status_mode1.rsp_seq_num =
+ cpu_to_be32(ersp->rsn);
+ ctio->u.nvme_status_mode1.transfer_len =
+ cpu_to_be32(ersp->xfrd_len);
+
+ ql_dbg(ql_dbg_nvme, vha, 0x1100f,
+ "op: %#x, rsplen: %#x\n", rsp_buf->op,
+ rsp_buf->rsplen);
+ } else {
+ ql_dbg(ql_dbg_nvme, vha, 0x11010,
+ "unhandled resp len = %x for op NVMET_FCOP_RSP\n",
+ rsp_buf->rsplen);
+ }
+ break;
+ }
+
+ /* Memory Barrier */
+ wmb();
+
+ qla2x00_start_iocbs(vha, vha->hw->req_q_map[0]);
+err_exit:
+ spin_unlock_irqrestore(&ha->hardware_lock, flags);
+}
+
+/*
+ * qla_nvmet_send_abts_ctio
+ * Send the abts CTIO to the firmware
+ */
+static void qla_nvmet_send_abts_ctio(struct scsi_qla_host *vha,
+ struct abts_recv_from_24xx *rabts, bool flag)
+{
+ struct abts_resp_to_24xx *resp;
+ srb_t *sp;
+ uint32_t f_ctl;
+ uint8_t *p;
+
+ /* Alloc SRB structure */
+ sp = qla2x00_get_sp(vha, NULL, GFP_ATOMIC);
+ if (!sp) {
+ ql_dbg(ql_dbg_nvme, vha, 0x11011, "Failed to allocate SRB\n");
+ return;
+ }
+
+ sp->type = SRB_NVMET_ABTS;
+ sp->name = "nvmet_abts";
+ sp->done = qla_nvmet_abts_done;
+
+ resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, sp);
+ if (!resp) {
+ ql_dbg(ql_dbg_nvme, vha, 0x3067,
+ "qla2x00t(%ld): %s failed: unable to allocate request packet",
+ vha->host_no, __func__);
+ return;
+ }
+
+ resp->entry_type = ABTS_RESP_24XX;
+ resp->entry_count = 1;
+ resp->handle = sp->handle;
+
+ resp->nport_handle = rabts->nport_handle;
+ resp->vp_index = rabts->vp_index;
+ resp->exchange_address = rabts->exchange_addr_to_abort;
+ resp->fcp_hdr_le = rabts->fcp_hdr_le;
+ f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
+ F_CTL_LAST_SEQ | F_CTL_END_SEQ |
+ F_CTL_SEQ_INITIATIVE);
+ p = (uint8_t *)&f_ctl;
+ resp->fcp_hdr_le.f_ctl[0] = *p++;
+ resp->fcp_hdr_le.f_ctl[1] = *p++;
+ resp->fcp_hdr_le.f_ctl[2] = *p;
+
+ resp->fcp_hdr_le.d_id[0] = rabts->fcp_hdr_le.s_id[0];
+ resp->fcp_hdr_le.d_id[1] = rabts->fcp_hdr_le.s_id[1];
+ resp->fcp_hdr_le.d_id[2] = rabts->fcp_hdr_le.s_id[2];
+ resp->fcp_hdr_le.s_id[0] = rabts->fcp_hdr_le.d_id[0];
+ resp->fcp_hdr_le.s_id[1] = rabts->fcp_hdr_le.d_id[1];
+ resp->fcp_hdr_le.s_id[2] = rabts->fcp_hdr_le.d_id[2];
+
+ if (flag) { /* BA_ACC */
+ resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
+ resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
+ resp->payload.ba_acct.low_seq_cnt = 0x0000;
+ resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
+ resp->payload.ba_acct.ox_id = rabts->fcp_hdr_le.ox_id;
+ resp->payload.ba_acct.rx_id = rabts->fcp_hdr_le.rx_id;
+ } else {
+ resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
+ resp->payload.ba_rjt.reason_code =
+ BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
+ }
+ /* Memory Barrier */
+ wmb();
+
+ qla2x00_start_iocbs(vha, vha->hw->req_q_map[0]);
+}
diff --git a/drivers/scsi/qla2xxx/qla_nvmet.h b/drivers/scsi/qla2xxx/qla_nvmet.h
new file mode 100644
index 000000000000..188ad2c5e3f1
--- /dev/null
+++ b/drivers/scsi/qla2xxx/qla_nvmet.h
@@ -0,0 +1,129 @@
+/*
+ * QLogic Fibre Channel HBA Driver
+ * Copyright (c) 2003-2017 QLogic Corporation
+ *
+ * See LICENSE.qla2xxx for copyright and licensing details.
+ */
+#ifndef __QLA_NVMET_H
+#define __QLA_NVMET_H
+
+#include <linux/blk-mq.h>
+#include <uapi/scsi/fc/fc_fs.h>
+#include <uapi/scsi/fc/fc_els.h>
+#include <linux/nvme-fc-driver.h>
+
+#include "qla_def.h"
+
+struct qla_nvmet_tgtport {
+ struct scsi_qla_host *vha;
+ struct completion tport_del;
+};
+
+struct qla_nvmet_cmd {
+ union {
+ struct nvmefc_tgt_ls_req ls_req;
+ struct nvmefc_tgt_fcp_req fcp_req;
+ } cmd;
+ struct scsi_qla_host *vha;
+ void *buf;
+ struct atio_from_isp atio;
+ struct atio7_nvme_cmnd nvme_cmd_iu;
+ uint16_t cmd_len;
+ spinlock_t nvme_cmd_lock;
+ struct list_head cmd_list; /* List of cmds */
+ struct work_struct work;
+
+ struct scatterlist *sg; /* cmd data buffer SG vector */
+ int sg_cnt; /* SG segments count */
+ int bufflen; /* cmd buffer length */
+ int offset;
+ enum dma_data_direction dma_data_direction;
+ uint16_t ox_id;
+ struct fc_port *fcport;
+};
+
+#define CTIO_NVME 0x82 /* CTIO FC-NVMe IOCB */
+struct ctio_nvme_to_27xx {
+ uint8_t entry_type; /* Entry type. */
+ uint8_t entry_count; /* Entry count. */
+ uint8_t sys_define; /* System defined. */
+ uint8_t entry_status; /* Entry Status. */
+
+ uint32_t handle; /* System handle. */
+ uint16_t nport_handle; /* N_PORT handle. */
+ uint16_t timeout; /* Command timeout. */
+
+ uint16_t dseg_count; /* Data segment count. */
+ uint8_t vp_index; /* vp_index */
+ uint8_t addl_flags; /* Additional flags */
+
+ uint8_t initiator_id[3]; /* Initiator ID */
+ uint8_t rsvd1;
+
+ uint32_t exchange_addr; /* Exch addr */
+
+ uint16_t ox_id; /* Ox ID */
+ uint16_t flags;
+#define NVMET_CTIO_STS_MODE0 0
+#define NVMET_CTIO_STS_MODE1 BIT_6
+#define NVMET_CTIO_STS_MODE2 BIT_7
+#define NVMET_CTIO_SEND_STATUS BIT_15
+ union {
+ struct {
+ uint8_t reserved1[8];
+ uint32_t relative_offset;
+ uint8_t reserved2[4];
+ uint32_t transfer_len;
+ uint8_t reserved3[4];
+ uint32_t dsd0[2];
+ uint32_t dsd0_len;
+ } nvme_status_mode0;
+ struct {
+ uint8_t nvme_comp_q_entry[16];
+ uint32_t transfer_len;
+ uint32_t rsp_seq_num;
+ uint32_t dsd0[2];
+ uint32_t dsd0_len;
+ } nvme_status_mode1;
+ struct {
+ uint32_t reserved4[4];
+ uint32_t transfer_len;
+ uint32_t reserved5;
+ uint32_t rsp_dsd[2];
+ uint32_t rsp_dsd_len;
+ } nvme_status_mode2;
+ } u;
+} __packed;
+
+/*
+ * ISP queue - CTIO type FC NVMe from ISP to target driver
+ * returned entry structure.
+ */
+struct ctio_nvme_from_27xx {
+ uint8_t entry_type; /* Entry type. */
+ uint8_t entry_count; /* Entry count. */
+ uint8_t sys_define; /* System defined. */
+ uint8_t entry_status; /* Entry Status. */
+ uint32_t handle; /* System defined handle */
+ uint16_t status;
+ uint16_t timeout;
+ uint16_t dseg_count; /* Data segment count. */
+ uint8_t vp_index;
+ uint8_t reserved1[5];
+ uint32_t exchange_address;
+ uint16_t ox_id;
+ uint16_t flags;
+ uint32_t residual;
+ uint8_t reserved2[32];
+} __packed;
+
+int qla_nvmet_handle_ls(struct scsi_qla_host *vha,
+ struct pt_ls4_rx_unsol *ls4, void *buf);
+int qla_nvmet_create_targetport(struct scsi_qla_host *vha);
+int qla_nvmet_delete(struct scsi_qla_host *vha);
+int qla_nvmet_handle_abts(struct scsi_qla_host *vha,
+ struct abts_recv_from_24xx *abts);
+int qla_nvmet_process_cmd(struct scsi_qla_host *vha,
+ struct qla_nvmet_cmd *cmd);
+
+#endif
--
2.12.0
