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295 lines
7.2 KiB
295 lines
7.2 KiB
/* |
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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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