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linux/drivers/scsi/fnic/fnic_res.c
Abhijeet Joglekar 5df6d737dd [SCSI] fnic: Add new Cisco PCI-Express FCoE HBA 
fnic is a driver for the Cisco PCI-Express FCoE HBA

Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
2009-05-13 22:13:09 -04:00

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/*
* Copyright 2008 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova 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 "rq_enet_desc.h"
#include "cq_enet_desc.h"
#include "vnic_resource.h"
#include "vnic_dev.h"
#include "vnic_wq.h"
#include "vnic_rq.h"
#include "vnic_cq.h"
#include "vnic_intr.h"
#include "vnic_stats.h"
#include "vnic_nic.h"
#include "fnic.h"
int fnic_get_vnic_config(struct fnic *fnic)
{
struct vnic_fc_config *c = &fnic->config;
int err;
#define GET_CONFIG(m) \
do { \
err = vnic_dev_spec(fnic->vdev, \
offsetof(struct vnic_fc_config, m), \
sizeof(c->m), &c->m); \
if (err) { \
shost_printk(KERN_ERR, fnic->lport->host, \
"Error getting %s, %d\n", #m, \
err); \
return err; \
} \
} while (0);
GET_CONFIG(node_wwn);
GET_CONFIG(port_wwn);
GET_CONFIG(wq_enet_desc_count);
GET_CONFIG(wq_copy_desc_count);
GET_CONFIG(rq_desc_count);
GET_CONFIG(maxdatafieldsize);
GET_CONFIG(ed_tov);
GET_CONFIG(ra_tov);
GET_CONFIG(intr_timer);
GET_CONFIG(intr_timer_type);
GET_CONFIG(flags);
GET_CONFIG(flogi_retries);
GET_CONFIG(flogi_timeout);
GET_CONFIG(plogi_retries);
GET_CONFIG(plogi_timeout);
GET_CONFIG(io_throttle_count);
GET_CONFIG(link_down_timeout);
GET_CONFIG(port_down_timeout);
GET_CONFIG(port_down_io_retries);
GET_CONFIG(luns_per_tgt);
c->wq_enet_desc_count =
min_t(u32, VNIC_FNIC_WQ_DESCS_MAX,
max_t(u32, VNIC_FNIC_WQ_DESCS_MIN,
c->wq_enet_desc_count));
c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
c->wq_copy_desc_count =
min_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MAX,
max_t(u32, VNIC_FNIC_WQ_COPY_DESCS_MIN,
c->wq_copy_desc_count));
c->wq_copy_desc_count = ALIGN(c->wq_copy_desc_count, 16);
c->rq_desc_count =
min_t(u32, VNIC_FNIC_RQ_DESCS_MAX,
max_t(u32, VNIC_FNIC_RQ_DESCS_MIN,
c->rq_desc_count));
c->rq_desc_count = ALIGN(c->rq_desc_count, 16);
c->maxdatafieldsize =
min_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MAX,
max_t(u16, VNIC_FNIC_MAXDATAFIELDSIZE_MIN,
c->maxdatafieldsize));
c->ed_tov =
min_t(u32, VNIC_FNIC_EDTOV_MAX,
max_t(u32, VNIC_FNIC_EDTOV_MIN,
c->ed_tov));
c->ra_tov =
min_t(u32, VNIC_FNIC_RATOV_MAX,
max_t(u32, VNIC_FNIC_RATOV_MIN,
c->ra_tov));
c->flogi_retries =
min_t(u32, VNIC_FNIC_FLOGI_RETRIES_MAX, c->flogi_retries);
c->flogi_timeout =
min_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MAX,
max_t(u32, VNIC_FNIC_FLOGI_TIMEOUT_MIN,
c->flogi_timeout));
c->plogi_retries =
min_t(u32, VNIC_FNIC_PLOGI_RETRIES_MAX, c->plogi_retries);
c->plogi_timeout =
min_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MAX,
max_t(u32, VNIC_FNIC_PLOGI_TIMEOUT_MIN,
c->plogi_timeout));
c->io_throttle_count =
min_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MAX,
max_t(u32, VNIC_FNIC_IO_THROTTLE_COUNT_MIN,
c->io_throttle_count));
c->link_down_timeout =
min_t(u32, VNIC_FNIC_LINK_DOWN_TIMEOUT_MAX,
c->link_down_timeout);
c->port_down_timeout =
min_t(u32, VNIC_FNIC_PORT_DOWN_TIMEOUT_MAX,
c->port_down_timeout);
c->port_down_io_retries =
min_t(u32, VNIC_FNIC_PORT_DOWN_IO_RETRIES_MAX,
c->port_down_io_retries);
c->luns_per_tgt =
min_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MAX,
max_t(u32, VNIC_FNIC_LUNS_PER_TARGET_MIN,
c->luns_per_tgt));
c->intr_timer = min_t(u16, VNIC_INTR_TIMER_MAX, c->intr_timer);
c->intr_timer_type = c->intr_timer_type;
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC MAC addr %02x:%02x:%02x:%02x:%02x:%02x "
"wq/wq_copy/rq %d/%d/%d\n",
fnic->mac_addr[0], fnic->mac_addr[1], fnic->mac_addr[2],
fnic->mac_addr[3], fnic->mac_addr[4], fnic->mac_addr[5],
c->wq_enet_desc_count, c->wq_copy_desc_count,
c->rq_desc_count);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC node wwn %llx port wwn %llx\n",
c->node_wwn, c->port_wwn);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC ed_tov %d ra_tov %d\n",
c->ed_tov, c->ra_tov);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC mtu %d intr timer %d\n",
c->maxdatafieldsize, c->intr_timer);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC flags 0x%x luns per tgt %d\n",
c->flags, c->luns_per_tgt);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC flogi_retries %d flogi timeout %d\n",
c->flogi_retries, c->flogi_timeout);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC plogi retries %d plogi timeout %d\n",
c->plogi_retries, c->plogi_timeout);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC io throttle count %d link dn timeout %d\n",
c->io_throttle_count, c->link_down_timeout);
shost_printk(KERN_INFO, fnic->lport->host,
"vNIC port dn io retries %d port dn timeout %d\n",
c->port_down_io_retries, c->port_down_timeout);
return 0;
}
int fnic_set_nic_config(struct fnic *fnic, u8 rss_default_cpu,
u8 rss_hash_type,
u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable,
u8 tso_ipid_split_en, u8 ig_vlan_strip_en)
{
u64 a0, a1;
u32 nic_cfg;
int wait = 1000;
vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
rss_hash_type, rss_hash_bits, rss_base_cpu,
rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
a0 = nic_cfg;
a1 = 0;
return vnic_dev_cmd(fnic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
}
void fnic_get_res_counts(struct fnic *fnic)
{
fnic->wq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_WQ);
fnic->raw_wq_count = fnic->wq_count - 1;
fnic->wq_copy_count = fnic->wq_count - fnic->raw_wq_count;
fnic->rq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_RQ);
fnic->cq_count = vnic_dev_get_res_count(fnic->vdev, RES_TYPE_CQ);
fnic->intr_count = vnic_dev_get_res_count(fnic->vdev,
RES_TYPE_INTR_CTRL);
}
void fnic_free_vnic_resources(struct fnic *fnic)
{
unsigned int i;
for (i = 0; i < fnic->raw_wq_count; i++)
vnic_wq_free(&fnic->wq[i]);
for (i = 0; i < fnic->wq_copy_count; i++)
vnic_wq_copy_free(&fnic->wq_copy[i]);
for (i = 0; i < fnic->rq_count; i++)
vnic_rq_free(&fnic->rq[i]);
for (i = 0; i < fnic->cq_count; i++)
vnic_cq_free(&fnic->cq[i]);
for (i = 0; i < fnic->intr_count; i++)
vnic_intr_free(&fnic->intr[i]);
}
int fnic_alloc_vnic_resources(struct fnic *fnic)
{
enum vnic_dev_intr_mode intr_mode;
unsigned int mask_on_assertion;
unsigned int interrupt_offset;
unsigned int error_interrupt_enable;
unsigned int error_interrupt_offset;
unsigned int i, cq_index;
unsigned int wq_copy_cq_desc_count;
int err;
intr_mode = vnic_dev_get_intr_mode(fnic->vdev);
shost_printk(KERN_INFO, fnic->lport->host, "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");
shost_printk(KERN_INFO, fnic->lport->host, "vNIC resources avail: "
"wq %d cp_wq %d raw_wq %d rq %d cq %d intr %d\n",
fnic->wq_count, fnic->wq_copy_count, fnic->raw_wq_count,
fnic->rq_count, fnic->cq_count, fnic->intr_count);
/* Allocate Raw WQ used for FCS frames */
for (i = 0; i < fnic->raw_wq_count; i++) {
err = vnic_wq_alloc(fnic->vdev, &fnic->wq[i], i,
fnic->config.wq_enet_desc_count,
sizeof(struct wq_enet_desc));
if (err)
goto err_out_cleanup;
}
/* Allocate Copy WQs used for SCSI IOs */
for (i = 0; i < fnic->wq_copy_count; i++) {
err = vnic_wq_copy_alloc(fnic->vdev, &fnic->wq_copy[i],
(fnic->raw_wq_count + i),
fnic->config.wq_copy_desc_count,
sizeof(struct fcpio_host_req));
if (err)
goto err_out_cleanup;
}
/* RQ for receiving FCS frames */
for (i = 0; i < fnic->rq_count; i++) {
err = vnic_rq_alloc(fnic->vdev, &fnic->rq[i], i,
fnic->config.rq_desc_count,
sizeof(struct rq_enet_desc));
if (err)
goto err_out_cleanup;
}
/* CQ for each RQ */
for (i = 0; i < fnic->rq_count; i++) {
cq_index = i;
err = vnic_cq_alloc(fnic->vdev,
&fnic->cq[cq_index], cq_index,
fnic->config.rq_desc_count,
sizeof(struct cq_enet_rq_desc));
if (err)
goto err_out_cleanup;
}
/* CQ for each WQ */
for (i = 0; i < fnic->raw_wq_count; i++) {
cq_index = fnic->rq_count + i;
err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index], cq_index,
fnic->config.wq_enet_desc_count,
sizeof(struct cq_enet_wq_desc));
if (err)
goto err_out_cleanup;
}
/* CQ for each COPY WQ */
wq_copy_cq_desc_count = (fnic->config.wq_copy_desc_count * 3);
for (i = 0; i < fnic->wq_copy_count; i++) {
cq_index = fnic->raw_wq_count + fnic->rq_count + i;
err = vnic_cq_alloc(fnic->vdev, &fnic->cq[cq_index],
cq_index,
wq_copy_cq_desc_count,
sizeof(struct fcpio_fw_req));
if (err)
goto err_out_cleanup;
}
for (i = 0; i < fnic->intr_count; i++) {
err = vnic_intr_alloc(fnic->vdev, &fnic->intr[i], i);
if (err)
goto err_out_cleanup;
}
fnic->legacy_pba = vnic_dev_get_res(fnic->vdev,
RES_TYPE_INTR_PBA_LEGACY, 0);
if (!fnic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
shost_printk(KERN_ERR, fnic->lport->host,
"Failed to hook legacy pba resource\n");
err = -ENODEV;
goto err_out_cleanup;
}
/*
* Init RQ/WQ resources.
*
* RQ[0 to n-1] point to CQ[0 to n-1]
* WQ[0 to m-1] point to CQ[n to n+m-1]
* WQ_COPY[0 to k-1] points to CQ[n+m to n+m+k-1]
*
* Note for copy wq we always initialize with cq_index = 0
*
* Error interrupt is not enabled for MSI.
*/
switch (intr_mode) {
case VNIC_DEV_INTR_MODE_INTX:
case VNIC_DEV_INTR_MODE_MSIX:
error_interrupt_enable = 1;
error_interrupt_offset = fnic->err_intr_offset;
break;
default:
error_interrupt_enable = 0;
error_interrupt_offset = 0;
break;
}
for (i = 0; i < fnic->rq_count; i++) {
cq_index = i;
vnic_rq_init(&fnic->rq[i],
cq_index,
error_interrupt_enable,
error_interrupt_offset);
}
for (i = 0; i < fnic->raw_wq_count; i++) {
cq_index = i + fnic->rq_count;
vnic_wq_init(&fnic->wq[i],
cq_index,
error_interrupt_enable,
error_interrupt_offset);
}
for (i = 0; i < fnic->wq_copy_count; i++) {
vnic_wq_copy_init(&fnic->wq_copy[i],
0 /* cq_index 0 - always */,
error_interrupt_enable,
error_interrupt_offset);
}
for (i = 0; i < fnic->cq_count; i++) {
switch (intr_mode) {
case VNIC_DEV_INTR_MODE_MSIX:
interrupt_offset = i;
break;
default:
interrupt_offset = 0;
break;
}
vnic_cq_init(&fnic->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 */,
interrupt_offset,
0 /* cq_message_addr */);
}
/*
* Init INTR resources
*
* mask_on_assertion is not used for INTx due to the level-
* triggered nature of INTx
*/
switch (intr_mode) {
case VNIC_DEV_INTR_MODE_MSI:
case VNIC_DEV_INTR_MODE_MSIX:
mask_on_assertion = 1;
break;
default:
mask_on_assertion = 0;
break;
}
for (i = 0; i < fnic->intr_count; i++) {
vnic_intr_init(&fnic->intr[i],
fnic->config.intr_timer,
fnic->config.intr_timer_type,
mask_on_assertion);
}
/* init the stats memory by making the first call here */
err = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
if (err) {
shost_printk(KERN_ERR, fnic->lport->host,
"vnic_dev_stats_dump failed - x%x\n", err);
goto err_out_cleanup;
}
/* Clear LIF stats */
vnic_dev_stats_clear(fnic->vdev);
return 0;
err_out_cleanup:
fnic_free_vnic_resources(fnic);
return err;
}
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