snic_io.h contains meta request structure definition
meta request contains high level information about firmware requests.
such as request information, size, SGLs.
snic_io.c contains interfaces to handle meta request, firmware acknowledgment,
and high level generic queueing interface.
Signed-off-by: Narsimhulu Musini
Signed-off-by: Sesidhar Baddela
---
* v3
- Removed request alignment functionality.
drivers/scsi/snic/snic_io.c | 519
drivers/scsi/snic/snic_io.h | 118 ++
2 files changed, 637 insertions(+)
create mode 100644 drivers/scsi/snic/snic_io.c
create mode 100644 drivers/scsi/snic/snic_io.h
diff --git a/drivers/scsi/snic/snic_io.c b/drivers/scsi/snic/snic_io.c
new file mode 100644
index 000..75235ea
--- /dev/null
+++ b/drivers/scsi/snic/snic_io.c
@@ -0,0 +1,519 @@
+/*
+ * Copyright 2014 Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include
+#include
+#include
+
+#include
+#include
+#include
+#include
+#include
+
+#include "snic_io.h"
+#include "snic.h"
+#include "cq_enet_desc.h"
+#include "snic_fwint.h"
+
+static void
+snic_wq_cmpl_frame_send(struct vnic_wq *wq,
+ struct cq_desc *cq_desc,
+ struct vnic_wq_buf *buf,
+ void *opaque)
+{
+ struct snic *snic = vnic_dev_priv(wq->vdev);
+
+ SNIC_BUG_ON(buf->os_buf == NULL);
+
+ if (snic_log_level & SNIC_DESC_LOGGING)
+ SNIC_HOST_INFO(snic->shost,
+ "Ack received for snic_host_req %p.\n",
+ buf->os_buf);
+
+ SNIC_TRC(snic->shost->host_no, 0, 0,
+((u64)(buf->os_buf) - sizeof(struct snic_req_info)), 0, 0, 0);
+ pci_unmap_single(snic->pdev, buf->dma_addr, buf->len, PCI_DMA_TODEVICE);
+ buf->os_buf = NULL;
+}
+
+static int
+snic_wq_cmpl_handler_cont(struct vnic_dev *vdev,
+ struct cq_desc *cq_desc,
+ u8 type,
+ u16 q_num,
+ u16 cmpl_idx,
+ void *opaque)
+{
+ struct snic *snic = vnic_dev_priv(vdev);
+ unsigned long flags;
+
+ SNIC_BUG_ON(q_num != 0);
+
+ spin_lock_irqsave(&snic->wq_lock[q_num], flags);
+ vnic_wq_service(&snic->wq[q_num],
+ cq_desc,
+ cmpl_idx,
+ snic_wq_cmpl_frame_send,
+ NULL);
+ spin_unlock_irqrestore(&snic->wq_lock[q_num], flags);
+
+ return 0;
+} /* end of snic_cmpl_handler_cont */
+
+int
+snic_wq_cmpl_handler(struct snic *snic, int work_to_do)
+{
+ unsigned int work_done = 0;
+ unsigned int i;
+
+ snic->s_stats.misc.last_ack_time = jiffies;
+ for (i = 0; i < snic->wq_count; i++) {
+ work_done += vnic_cq_service(&snic->cq[i],
+ work_to_do,
+ snic_wq_cmpl_handler_cont,
+ NULL);
+ }
+
+ return work_done;
+} /* end of snic_wq_cmpl_handler */
+
+void
+snic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
+{
+
+ struct snic_host_req *req = buf->os_buf;
+ struct snic *snic = vnic_dev_priv(wq->vdev);
+ struct snic_req_info *rqi = NULL;
+ unsigned long flags;
+
+ pci_unmap_single(snic->pdev, buf->dma_addr, buf->len, PCI_DMA_TODEVICE);
+
+ rqi = req_to_rqi(req);
+ spin_lock_irqsave(&snic->spl_cmd_lock, flags);
+ if (list_empty(&rqi->list)) {
+ spin_unlock_irqrestore(&snic->spl_cmd_lock, flags);
+ goto end;
+ }
+
+ SNIC_BUG_ON(rqi->list.next == NULL); /* if not added to spl_cmd_list */
+ list_del_init(&rqi->list);
+ spin_unlock_irqrestore(&snic->spl_cmd_lock, flags);
+
+ if (rqi->sge_va) {
+ snic_pci_unmap_rsp_buf(snic, rqi);
+ kfree((void *)rqi->sge_va);
+ rqi->sge_va = 0;
+ }
+ snic_req_free(snic, rqi);
+ SNIC_HOST_INFO(snic->shost, "snic_free_wq_buf .. freed.\n");
+
+end:
+ return;
+}
+
+/* Criteria to select work queue in multi queue mode */
+static int
+snic_select_wq(str
