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scsi: fnic: Add devcmd2 initialization helpers

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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>
This commit is contained in:
Satish Kharat 2019-01-18 14:51:42 -08:00 committed by Martin K. Petersen
parent 6c10cb44ea
commit 9d699c6280
2 changed files with 74 additions and 0 deletions
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66
drivers/scsi/fnic/vnic_wq.c
View File

@ -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)

8
drivers/scsi/fnic/vnic_wq.h
View File

@ -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);