mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c8806b6c9e
Cisco has developed a new PCI HBA interface called sNIC, which stands for SCSI NIC. This is a new storage feature supported on specialized network adapter. The new PCI function provides a uniform host interface and abstracts backend storage. [jejb: fix up checkpatch errors] Signed-off-by: Narsimhulu Musini <nmusini@cisco.com> Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
296 lines
7.2 KiB
C
296 lines
7.2 KiB
C
/*
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* Copyright 2014 Cisco Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include "wq_enet_desc.h"
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#include "cq_enet_desc.h"
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#include "vnic_resource.h"
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#include "vnic_dev.h"
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#include "vnic_wq.h"
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#include "vnic_cq.h"
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#include "vnic_intr.h"
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#include "vnic_stats.h"
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#include "snic.h"
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int
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snic_get_vnic_config(struct snic *snic)
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{
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struct vnic_snic_config *c = &snic->config;
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int ret;
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#define GET_CONFIG(m) \
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do { \
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ret = svnic_dev_spec(snic->vdev, \
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offsetof(struct vnic_snic_config, m), \
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sizeof(c->m), \
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&c->m); \
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if (ret) { \
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SNIC_HOST_ERR(snic->shost, \
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"Error getting %s, %d\n", #m, ret); \
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return ret; \
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} \
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} while (0)
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GET_CONFIG(wq_enet_desc_count);
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GET_CONFIG(maxdatafieldsize);
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GET_CONFIG(intr_timer);
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GET_CONFIG(intr_timer_type);
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GET_CONFIG(flags);
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GET_CONFIG(io_throttle_count);
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GET_CONFIG(port_down_timeout);
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GET_CONFIG(port_down_io_retries);
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GET_CONFIG(luns_per_tgt);
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GET_CONFIG(xpt_type);
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GET_CONFIG(hid);
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c->wq_enet_desc_count = min_t(u32,
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VNIC_SNIC_WQ_DESCS_MAX,
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max_t(u32,
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VNIC_SNIC_WQ_DESCS_MIN,
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c->wq_enet_desc_count));
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c->wq_enet_desc_count = ALIGN(c->wq_enet_desc_count, 16);
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c->maxdatafieldsize = min_t(u32,
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VNIC_SNIC_MAXDATAFIELDSIZE_MAX,
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max_t(u32,
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VNIC_SNIC_MAXDATAFIELDSIZE_MIN,
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c->maxdatafieldsize));
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c->io_throttle_count = min_t(u32,
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VNIC_SNIC_IO_THROTTLE_COUNT_MAX,
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max_t(u32,
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VNIC_SNIC_IO_THROTTLE_COUNT_MIN,
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c->io_throttle_count));
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c->port_down_timeout = min_t(u32,
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VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX,
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c->port_down_timeout);
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c->port_down_io_retries = min_t(u32,
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VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX,
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c->port_down_io_retries);
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c->luns_per_tgt = min_t(u32,
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VNIC_SNIC_LUNS_PER_TARGET_MAX,
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max_t(u32,
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VNIC_SNIC_LUNS_PER_TARGET_MIN,
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c->luns_per_tgt));
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c->intr_timer = min_t(u32, VNIC_INTR_TIMER_MAX, c->intr_timer);
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SNIC_INFO("vNIC resources wq %d\n", c->wq_enet_desc_count);
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SNIC_INFO("vNIC mtu %d intr timer %d\n",
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c->maxdatafieldsize,
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c->intr_timer);
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SNIC_INFO("vNIC flags 0x%x luns per tgt %d\n",
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c->flags,
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c->luns_per_tgt);
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SNIC_INFO("vNIC io throttle count %d\n", c->io_throttle_count);
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SNIC_INFO("vNIC port down timeout %d port down io retries %d\n",
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c->port_down_timeout,
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c->port_down_io_retries);
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SNIC_INFO("vNIC back end type = %d\n", c->xpt_type);
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SNIC_INFO("vNIC hid = %d\n", c->hid);
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return 0;
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}
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void
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snic_get_res_counts(struct snic *snic)
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{
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snic->wq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_WQ);
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SNIC_BUG_ON(snic->wq_count == 0);
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snic->cq_count = svnic_dev_get_res_count(snic->vdev, RES_TYPE_CQ);
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SNIC_BUG_ON(snic->cq_count == 0);
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snic->intr_count = svnic_dev_get_res_count(snic->vdev,
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RES_TYPE_INTR_CTRL);
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SNIC_BUG_ON(snic->intr_count == 0);
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}
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void
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snic_free_vnic_res(struct snic *snic)
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{
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unsigned int i;
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for (i = 0; i < snic->wq_count; i++)
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svnic_wq_free(&snic->wq[i]);
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for (i = 0; i < snic->cq_count; i++)
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svnic_cq_free(&snic->cq[i]);
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for (i = 0; i < snic->intr_count; i++)
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svnic_intr_free(&snic->intr[i]);
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}
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int
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snic_alloc_vnic_res(struct snic *snic)
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{
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enum vnic_dev_intr_mode intr_mode;
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unsigned int mask_on_assertion;
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unsigned int intr_offset;
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unsigned int err_intr_enable;
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unsigned int err_intr_offset;
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unsigned int i;
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int ret;
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intr_mode = svnic_dev_get_intr_mode(snic->vdev);
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SNIC_INFO("vNIC interrupt mode: %s\n",
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((intr_mode == VNIC_DEV_INTR_MODE_INTX) ?
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"Legacy PCI INTx" :
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((intr_mode == VNIC_DEV_INTR_MODE_MSI) ?
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"MSI" :
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((intr_mode == VNIC_DEV_INTR_MODE_MSIX) ?
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"MSI-X" : "Unknown"))));
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/* only MSI-X is supported */
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SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
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SNIC_INFO("wq %d cq %d intr %d\n", snic->wq_count,
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snic->cq_count,
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snic->intr_count);
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/* Allocate WQs used for SCSI IOs */
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for (i = 0; i < snic->wq_count; i++) {
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ret = svnic_wq_alloc(snic->vdev,
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&snic->wq[i],
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i,
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snic->config.wq_enet_desc_count,
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sizeof(struct wq_enet_desc));
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if (ret)
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goto error_cleanup;
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}
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/* CQ for each WQ */
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for (i = 0; i < snic->wq_count; i++) {
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ret = svnic_cq_alloc(snic->vdev,
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&snic->cq[i],
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i,
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snic->config.wq_enet_desc_count,
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sizeof(struct cq_enet_wq_desc));
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if (ret)
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goto error_cleanup;
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}
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SNIC_BUG_ON(snic->cq_count != 2 * snic->wq_count);
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/* CQ for FW TO host */
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for (i = snic->wq_count; i < snic->cq_count; i++) {
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ret = svnic_cq_alloc(snic->vdev,
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&snic->cq[i],
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i,
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(snic->config.wq_enet_desc_count * 3),
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sizeof(struct snic_fw_req));
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if (ret)
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goto error_cleanup;
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}
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for (i = 0; i < snic->intr_count; i++) {
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ret = svnic_intr_alloc(snic->vdev, &snic->intr[i], i);
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if (ret)
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goto error_cleanup;
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}
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/*
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* Init WQ Resources.
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* WQ[0 to n] points to CQ[0 to n-1]
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* firmware to host comm points to CQ[n to m+1]
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*/
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err_intr_enable = 1;
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err_intr_offset = snic->err_intr_offset;
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for (i = 0; i < snic->wq_count; i++) {
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svnic_wq_init(&snic->wq[i],
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i,
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err_intr_enable,
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err_intr_offset);
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}
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for (i = 0; i < snic->cq_count; i++) {
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intr_offset = i;
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svnic_cq_init(&snic->cq[i],
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0 /* flow_control_enable */,
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1 /* color_enable */,
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0 /* cq_head */,
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0 /* cq_tail */,
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1 /* cq_tail_color */,
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1 /* interrupt_enable */,
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1 /* cq_entry_enable */,
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0 /* cq_message_enable */,
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intr_offset,
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0 /* cq_message_addr */);
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}
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/*
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* Init INTR resources
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* Assumption : snic is always in MSI-X mode
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*/
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SNIC_BUG_ON(intr_mode != VNIC_DEV_INTR_MODE_MSIX);
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mask_on_assertion = 1;
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for (i = 0; i < snic->intr_count; i++) {
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svnic_intr_init(&snic->intr[i],
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snic->config.intr_timer,
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snic->config.intr_timer_type,
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mask_on_assertion);
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}
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/* init the stats memory by making the first call here */
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ret = svnic_dev_stats_dump(snic->vdev, &snic->stats);
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if (ret) {
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SNIC_HOST_ERR(snic->shost,
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"svnic_dev_stats_dump failed - x%x\n",
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ret);
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goto error_cleanup;
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}
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/* Clear LIF stats */
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svnic_dev_stats_clear(snic->vdev);
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ret = 0;
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return ret;
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error_cleanup:
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snic_free_vnic_res(snic);
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return ret;
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}
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void
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snic_log_q_error(struct snic *snic)
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{
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unsigned int i;
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u32 err_status;
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for (i = 0; i < snic->wq_count; i++) {
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err_status = ioread32(&snic->wq[i].ctrl->error_status);
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if (err_status)
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SNIC_HOST_ERR(snic->shost,
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"WQ[%d] error status %d\n",
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i,
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err_status);
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}
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} /* end of snic_log_q_error */
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