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1825aca667
linux_dsm_epyc7002/drivers/net/enic/enic_res.c
Vasanthy Kolluri 1825aca667 enic: Feature Add: Add loopback capability to enic devices 
Hardware has the loopback capability to queue the packets transmitted from
a device to the receive queue of the same device. enic now supports the
loopback capability.

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-25 20:50:24 -07:00

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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/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include "wq_enet_desc.h"
#include "rq_enet_desc.h"
#include "cq_enet_desc.h"
#include "vnic_resource.h"
#include "vnic_enet.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 "vnic_rss.h"
#include "enic_res.h"
#include "enic.h"
int enic_get_vnic_config(struct enic *enic)
{
struct vnic_enet_config *c = &enic->config;
int err;
err = vnic_dev_mac_addr(enic->vdev, enic->mac_addr);
if (err) {
dev_err(enic_get_dev(enic),
"Error getting MAC addr, %d\n", err);
return err;
}
#define GET_CONFIG(m) \
do { \
err = vnic_dev_spec(enic->vdev, \
offsetof(struct vnic_enet_config, m), \
sizeof(c->m), &c->m); \
if (err) { \
dev_err(enic_get_dev(enic), \
"Error getting %s, %d\n", #m, err); \
return err; \
} \
} while (0)
GET_CONFIG(flags);
GET_CONFIG(wq_desc_count);
GET_CONFIG(rq_desc_count);
GET_CONFIG(mtu);
GET_CONFIG(intr_timer_type);
GET_CONFIG(intr_mode);
GET_CONFIG(intr_timer_usec);
GET_CONFIG(loop_tag);
c->wq_desc_count =
min_t(u32, ENIC_MAX_WQ_DESCS,
max_t(u32, ENIC_MIN_WQ_DESCS,
c->wq_desc_count));
c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
c->rq_desc_count =
min_t(u32, ENIC_MAX_RQ_DESCS,
max_t(u32, ENIC_MIN_RQ_DESCS,
c->rq_desc_count));
c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
if (c->mtu == 0)
c->mtu = 1500;
c->mtu = min_t(u16, ENIC_MAX_MTU,
max_t(u16, ENIC_MIN_MTU,
c->mtu));
c->intr_timer_usec = min_t(u32,
INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
c->intr_timer_usec);
dev_info(enic_get_dev(enic), "vNIC MAC addr %pM wq/rq %d/%d\n",
enic->mac_addr, c->wq_desc_count, c->rq_desc_count);
dev_info(enic_get_dev(enic), "vNIC mtu %d csum tx/rx %d/%d "
"tso/lro %d/%d intr timer %d usec\n",
c->mtu, ENIC_SETTING(enic, TXCSUM),
ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
ENIC_SETTING(enic, LRO), c->intr_timer_usec);
return 0;
}
int enic_add_vlan(struct enic *enic, u16 vlanid)
{
u64 a0 = vlanid, a1 = 0;
int wait = 1000;
int err;
err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
if (err)
dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err);
return err;
}
int enic_del_vlan(struct enic *enic, u16 vlanid)
{
u64 a0 = vlanid, a1 = 0;
int wait = 1000;
int err;
err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
if (err)
dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err);
return err;
}
int enic_set_nic_cfg(struct enic *enic, 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(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
}
int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
{
u64 a0 = (u64)key_pa, a1 = len;
int wait = 1000;
return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
}
int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
{
u64 a0 = (u64)cpu_pa, a1 = len;
int wait = 1000;
return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
}
void enic_free_vnic_resources(struct enic *enic)
{
unsigned int i;
for (i = 0; i < enic->wq_count; i++)
vnic_wq_free(&enic->wq[i]);
for (i = 0; i < enic->rq_count; i++)
vnic_rq_free(&enic->rq[i]);
for (i = 0; i < enic->cq_count; i++)
vnic_cq_free(&enic->cq[i]);
for (i = 0; i < enic->intr_count; i++)
vnic_intr_free(&enic->intr[i]);
}
void enic_get_res_counts(struct enic *enic)
{
enic->wq_count = min_t(int,
vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ),
ENIC_WQ_MAX);
enic->rq_count = min_t(int,
vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ),
ENIC_RQ_MAX);
enic->cq_count = min_t(int,
vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ),
ENIC_CQ_MAX);
enic->intr_count = min_t(int,
vnic_dev_get_res_count(enic->vdev, RES_TYPE_INTR_CTRL),
ENIC_INTR_MAX);
dev_info(enic_get_dev(enic),
"vNIC resources avail: wq %d rq %d cq %d intr %d\n",
enic->wq_count, enic->rq_count,
enic->cq_count, enic->intr_count);
}
void enic_init_vnic_resources(struct enic *enic)
{
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 cq_index;
unsigned int i;
intr_mode = vnic_dev_get_intr_mode(enic->vdev);
/* Init RQ/WQ resources.
*
* RQ[0 - n-1] point to CQ[0 - n-1]
* WQ[0 - m-1] point to CQ[n - n+m-1]
*
* 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 = enic->intr_count - 2;
break;
default:
error_interrupt_enable = 0;
error_interrupt_offset = 0;
break;
}
for (i = 0; i < enic->rq_count; i++) {
cq_index = i;
vnic_rq_init(&enic->rq[i],
cq_index,
error_interrupt_enable,
error_interrupt_offset);
}
for (i = 0; i < enic->wq_count; i++) {
cq_index = enic->rq_count + i;
vnic_wq_init(&enic->wq[i],
cq_index,
error_interrupt_enable,
error_interrupt_offset);
}
/* Init CQ resources
*
* CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
* CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
*/
for (i = 0; i < enic->cq_count; i++) {
switch (intr_mode) {
case VNIC_DEV_INTR_MODE_MSIX:
interrupt_offset = i;
break;
default:
interrupt_offset = 0;
break;
}
vnic_cq_init(&enic->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 < enic->intr_count; i++) {
vnic_intr_init(&enic->intr[i],
INTR_COALESCE_USEC_TO_HW(enic->config.intr_timer_usec),
enic->config.intr_timer_type,
mask_on_assertion);
}
}
int enic_alloc_vnic_resources(struct enic *enic)
{
enum vnic_dev_intr_mode intr_mode;
unsigned int i;
int err;
intr_mode = vnic_dev_get_intr_mode(enic->vdev);
dev_info(enic_get_dev(enic), "vNIC resources used: "
"wq %d rq %d cq %d intr %d intr mode %s\n",
enic->wq_count, enic->rq_count,
enic->cq_count, enic->intr_count,
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");
/* Allocate queue resources
*/
for (i = 0; i < enic->wq_count; i++) {
err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
enic->config.wq_desc_count,
sizeof(struct wq_enet_desc));
if (err)
goto err_out_cleanup;
}
for (i = 0; i < enic->rq_count; i++) {
err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
enic->config.rq_desc_count,
sizeof(struct rq_enet_desc));
if (err)
goto err_out_cleanup;
}
for (i = 0; i < enic->cq_count; i++) {
if (i < enic->rq_count)
err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
enic->config.rq_desc_count,
sizeof(struct cq_enet_rq_desc));
else
err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
enic->config.wq_desc_count,
sizeof(struct cq_enet_wq_desc));
if (err)
goto err_out_cleanup;
}
for (i = 0; i < enic->intr_count; i++) {
err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
if (err)
goto err_out_cleanup;
}
/* Hook remaining resource
*/
enic->legacy_pba = vnic_dev_get_res(enic->vdev,
RES_TYPE_INTR_PBA_LEGACY, 0);
if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
dev_err(enic_get_dev(enic),
"Failed to hook legacy pba resource\n");
err = -ENODEV;
goto err_out_cleanup;
}
return 0;
err_out_cleanup:
enic_free_vnic_resources(enic);
return err;
}
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