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/*
* 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 <linux/errno.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "wq_enet_desc.h"
#include "cq_enet_desc.h"
#include "vnic_resource.h"
#include "vnic_dev.h"
#include "vnic_wq.h"
#include "vnic_cq.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "snic.h"
int
snic_get_vnic_config(struct snic *snic)
{
struct vnic_snic_config *c = &snic->config;
int ret;
#define GET_CONFIG(m) \
do { \
ret = svnic_dev_spec(snic->vdev, \
offsetof(struct vnic_snic_config, m), \
sizeof(c->m), \
&c->m); \
if (ret) { \
SNIC_HOST_ERR(snic->shost, \
"Error getting %s, %d\n", #m, ret); \
return ret; \
} \
} while (0)
GET_CONFIG(wq_enet_desc_count);
GET_CONFIG(maxdatafieldsize);
GET_CONFIG(intr_timer);
GET_CONFIG(intr_timer_type);
GET_CONFIG(flags);
GET_CONFIG(io_throttle_count);
GET_CONFIG(port_down_timeout);
GET_CONFIG(port_down_io_retries);
GET_CONFIG(luns_per_tgt);
GET_CONFIG(xpt_type);
GET_CONFIG(hid);
c->wq_enet_desc_count = min_t(u32,
VNIC_SNIC_WQ_DESCS_MAX,
max_t(u32,
VNIC_SNIC_WQ_DESCS_MIN,
c->wq_enet_desc_count));
c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
c->maxdatafieldsize = min_t(u32,
VNIC_SNIC_MAXDATAFIELDSIZE_MAX,
max_t(u32,
VNIC_SNIC_MAXDATAFIELDSIZE_MIN,
c->maxdatafieldsize));
c->io_throttle_count = min_t(u32,
VNIC_SNIC_IO_THROTTLE_COUNT_MAX,
max_t(u32,
VNIC_SNIC_IO_THROTTLE_COUNT_MIN,
c->io_throttle_count));
c->port_down_timeout = min_t(u32,
VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX,
c->port_down_timeout);
c->port_down_io_retries = min_t(u32,
VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX,
c->port_down_io_retries);
c->luns_per_tgt = min_t(u32,
VNIC_SNIC_LUNS_PER_TARGET_MAX,
max_t(u32,
VNIC_SNIC_LUNS_PER_TARGET_MIN,
c->luns_per_tgt));
c->intr_timer = min_t(u32, VNIC_INTR_TIMER_MAX, c->intr_timer);
SNIC_INFO("vNIC resources wq %d\n", c->wq_enet_desc_count);
SNIC_INFO("vNIC mtu %d intr timer %d\n",
c->maxdatafieldsize,
c->intr_timer);
SNIC_INFO("vNIC flags 0x%x luns per tgt %d\n",
c->flags,
c->luns_per_tgt);
SNIC_INFO("vNIC io throttle count %d\n", c->io_throttle_count);
SNIC_INFO("vNIC port down timeout %d port down io retries %d\n",
c->port_down_timeout,
c->port_down_io_retries);
SNIC_INFO("vNIC back end type = %d\n", c->xpt_type);
SNIC_INFO("vNIC hid = %d\n", c->hid);
return 0;
}
void
snic_get_res_counts(struct snic *snic)
{
snic->wq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_WQ);
SNIC_BUG_ON(snic->wq_count == 0);
snic->cq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_CQ);
SNIC_BUG_ON(snic->cq_count == 0);
snic->intr_count = svnic_dev_get_res_count(snic->vdev,
RES_TYPE_INTR_CTRL);
SNIC_BUG_ON(snic->intr_count == 0);
}
void
snic_free_vnic_res(struct snic *snic)
{
unsigned int i;
for (i = 0; i < snic->wq_count; i++)
svnic_wq_free(&snic->wq[i]);
for (i = 0; i < snic->cq_count; i++)
svnic_cq_free(&snic->cq[i]);
for (i = 0; i < snic->intr_count; i++)
svnic_intr_free(&snic->intr[i]);
}
int
snic_alloc_vnic_res(struct snic *snic)
{
enum vnic_dev_intr_mode intr_mode;
unsigned int mask_on_assertion;
unsigned int intr_offset;
unsigned int err_intr_enable;
unsigned int err_intr_offset;
unsigned int i;
int ret;
intr_mode = svnic_dev_get_intr_mode(snic->vdev);
SNIC_INFO("vNIC interrupt mode: %s\n",
((intr_mode == VNIC_DEV_INTR_MODE_INTX) ?
"Legacy PCI INTx" :
((intr_mode == VNIC_DEV_INTR_MODE_MSI) ?
"MSI" :
((intr_mode == VNIC_DEV_INTR_MODE_MSIX) ?
"MSI-X" : "Unknown"))));
/* only MSI-X is supported */
SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
SNIC_INFO("wq %d cq %d intr %d\n", snic->wq_count,
snic->cq_count,
snic->intr_count);
/* Allocate WQs used for SCSI IOs */
for (i = 0; i < snic->wq_count; i++) {
ret = svnic_wq_alloc(snic->vdev,
&snic->wq[i],
i,
snic->config.wq_enet_desc_count,
sizeof(struct wq_enet_desc));
if (ret)
goto error_cleanup;
}
/* CQ for each WQ */
for (i = 0; i < snic->wq_count; i++) {
ret = svnic_cq_alloc(snic->vdev,
&snic->cq[i],
i,
snic->config.wq_enet_desc_count,
sizeof(struct cq_enet_wq_desc));
if (ret)
goto error_cleanup;
}
SNIC_BUG_ON(snic->cq_count != 2 * snic->wq_count);
/* CQ for FW TO host */
for (i = snic->wq_count; i < snic->cq_count; i++) {
ret = svnic_cq_alloc(snic->vdev,
&snic->cq[i],
i,
(snic->config.wq_enet_desc_count * 3),
sizeof(struct snic_fw_req));
if (ret)
goto error_cleanup;
}
for (i = 0; i < snic->intr_count; i++) {
ret = svnic_intr_alloc(snic->vdev, &snic->intr[i], i);
if (ret)
goto error_cleanup;
}
/*
* Init WQ Resources.
* WQ[0 to n] points to CQ[0 to n-1]
* firmware to host comm points to CQ[n to m+1]
*/
err_intr_enable = 1;
err_intr_offset = snic->err_intr_offset;
for (i = 0; i < snic->wq_count; i++) {
svnic_wq_init(&snic->wq[i],
i,
err_intr_enable,
err_intr_offset);
}
for (i = 0; i < snic->cq_count; i++) {
intr_offset = i;
svnic_cq_init(&snic->cq[i],
0 /* flow_control_enable */,
1 /* color_enable */,
0 /* cq_head */,
0 /* cq_tail */,
1 /* cq_tail_color */,
1 /* interrupt_enable */,
1 /* cq_entry_enable */,
0 /* cq_message_enable */,
intr_offset,
0 /* cq_message_addr */);
}
/*
* Init INTR resources
* Assumption : snic is always in MSI-X mode
*/
SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
mask_on_assertion = 1;
for (i = 0; i < snic->intr_count; i++) {
svnic_intr_init(&snic->intr[i],
snic->config.intr_timer,
snic->config.intr_timer_type,
mask_on_assertion);
}
/* init the stats memory by making the first call here */
ret = svnic_dev_stats_dump(snic->vdev, &snic->stats);
if (ret) {
SNIC_HOST_ERR(snic->shost,
"svnic_dev_stats_dump failed - x%x\n",
ret);
goto error_cleanup;
}
/* Clear LIF stats */
svnic_dev_stats_clear(snic->vdev);
ret = 0;
return ret;
error_cleanup:
snic_free_vnic_res(snic);
return ret;
}
void
snic_log_q_error(struct snic *snic)
{
unsigned int i;
u32 err_status;
for (i = 0; i < snic->wq_count; i++) {
err_status = ioread32(&snic->wq[i].ctrl->error_status);
if (err_status)
SNIC_HOST_ERR(snic->shost,
"WQ[%d] error status %d\n",
i,
err_status);
}
} /* end of snic_log_q_error */
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