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remarkable-linux/drivers/scsi/fnic/fnic_res.c
Joe Eykholt 78112e5558 [SCSI] fnic: Add FIP support to the fnic driver 
Use libfcoe as a common FIP implementation with fcoe.
FIP or non-FIP mode is fully automatic if the firmware
supports and enables it.

Even if FIP is not supported, this uses libfcoe for the non-FIP
handling of FLOGI and its response.

Use the new lport_set_port_id() notification to capture
successful FLOGI responses and port_id resets.

While transitioning between Ethernet and FC mode, all rx and
tx FC frames are queued.  In Ethernet mode, all frames are
passed to the exchange manager to capture FLOGI responses.

Change to set data_src_addr to the ctl_src_addr whenever it
would have previously been zero because we're not logged in.
This seems safer so we'll never send a frame with a 0 source MAC.
This also eliminates a special case for sending FLOGI frames.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-04 12:01:19 -06:00

444 lines
12 KiB
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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 %pM "
"wq/wq_copy/rq %d/%d/%d\n",
fnic->ctlr.ctl_src_addr,
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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