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authorSatish Kharat <satishkh@cisco.com>2019-01-19 01:51:42 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2019-01-23 05:18:34 +0300
commit9d699c6280684c862afb4433d276d4fdce4349b0 (patch)
treeaee6ab44bea9fba24117a81dee77e62f6f09e2da /drivers/scsi/fnic
parent6c10cb44eaadbd13adee60d4cb8a2b8462e79fe2 (diff)
downloadlinux-9d699c6280684c862afb4433d276d4fdce4349b0.tar.xz
scsi: fnic: Add devcmd2 initialization helpers
This patch adds the devcmd2 wq initalization and devcmd2 ring allocation helper interfaces used by devcmd2 init. [mkp: typos] Signed-off-by: Satish Kharat <satishkh@cisco.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/fnic')
-rw-r--r--drivers/scsi/fnic/vnic_wq.c66
-rw-r--r--drivers/scsi/fnic/vnic_wq.h8
2 files changed, 74 insertions, 0 deletions
diff --git a/drivers/scsi/fnic/vnic_wq.c b/drivers/scsi/fnic/vnic_wq.c
index a414135460db..74cfc567f657 100644
--- a/drivers/scsi/fnic/vnic_wq.c
+++ b/drivers/scsi/fnic/vnic_wq.c
@@ -24,6 +24,26 @@
#include "vnic_dev.h"
#include "vnic_wq.h"
+
+int vnic_wq_get_ctrl(struct vnic_dev *vdev, struct vnic_wq *wq,
+ unsigned int index, enum vnic_res_type res_type)
+{
+ wq->ctrl = vnic_dev_get_res(vdev, res_type, index);
+
+ if (!wq->ctrl)
+ return -EINVAL;
+
+ return 0;
+}
+
+
+int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ return vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size);
+}
+
+
static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
{
struct vnic_wq_buf *buf;
@@ -111,6 +131,52 @@ int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
return 0;
}
+
+int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
+ unsigned int desc_count, unsigned int desc_size)
+{
+ int err;
+
+ wq->index = 0;
+ wq->vdev = vdev;
+
+ err = vnic_wq_get_ctrl(vdev, wq, 0, RES_TYPE_DEVCMD2);
+ if (err) {
+ pr_err("Failed to get devcmd2 resource\n");
+ return err;
+ }
+ vnic_wq_disable(wq);
+
+ err = vnic_wq_alloc_ring(vdev, wq, desc_count, desc_size);
+ if (err)
+ return err;
+ return 0;
+}
+
+void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
+ unsigned int fetch_index, unsigned int posted_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset)
+{
+ u64 paddr;
+ unsigned int count = wq->ring.desc_count;
+
+ paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
+ writeq(paddr, &wq->ctrl->ring_base);
+ iowrite32(count, &wq->ctrl->ring_size);
+ iowrite32(fetch_index, &wq->ctrl->fetch_index);
+ iowrite32(posted_index, &wq->ctrl->posted_index);
+ iowrite32(cq_index, &wq->ctrl->cq_index);
+ iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
+ iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
+ iowrite32(0, &wq->ctrl->error_status);
+
+ wq->to_use = wq->to_clean =
+ &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES]
+ [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES];
+}
+
+
void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
unsigned int error_interrupt_enable,
unsigned int error_interrupt_offset)
diff --git a/drivers/scsi/fnic/vnic_wq.h b/drivers/scsi/fnic/vnic_wq.h
index 5cd094f79281..5d1e0a44d94a 100644
--- a/drivers/scsi/fnic/vnic_wq.h
+++ b/drivers/scsi/fnic/vnic_wq.h
@@ -33,6 +33,8 @@
#define vnic_wq_service fnic_wq_service
#define vnic_wq_free fnic_wq_free
#define vnic_wq_alloc fnic_wq_alloc
+#define vnic_wq_devcmd2_alloc fnic_wq_devcmd2_alloc
+#define vnic_wq_init_start fnic_wq_init_start
#define vnic_wq_init fnic_wq_init
#define vnic_wq_error_status fnic_wq_error_status
#define vnic_wq_enable fnic_wq_enable
@@ -163,6 +165,12 @@ static inline void vnic_wq_service(struct vnic_wq *wq,
void vnic_wq_free(struct vnic_wq *wq);
int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index,
unsigned int desc_count, unsigned int desc_size);
+int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
+ unsigned int desc_count, unsigned int desc_size);
+void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
+ unsigned int fetch_index, unsigned int posted_index,
+ unsigned int error_interrupt_enable,
+ unsigned int error_interrupt_offset);
void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
unsigned int error_interrupt_enable,
unsigned int error_interrupt_offset);