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Release 4.11 drivers/net/ethernet/cisco/enic/vnic_wq.c

/*
 * Copyright 2008-2010 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/delay.h>
#include <linux/slab.h>

#include "vnic_dev.h"
#include "vnic_wq.h"
#include "enic.h"


static int vnic_wq_alloc_bufs(struct vnic_wq *wq) { struct vnic_wq_buf *buf; unsigned int i, j, count = wq->ring.desc_count; unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count); for (i = 0; i < blks; i++) { wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ(count), GFP_ATOMIC); if (!wq->bufs[i]) return -ENOMEM; } for (i = 0; i < blks; i++) { buf = wq->bufs[i]; for (j = 0; j < VNIC_WQ_BUF_BLK_ENTRIES(count); j++) { buf->index = i * VNIC_WQ_BUF_BLK_ENTRIES(count) + j; buf->desc = (u8 *)wq->ring.descs + wq->ring.desc_size * buf->index; if (buf->index + 1 == count) { buf->next = wq->bufs[0]; buf->next->prev = buf; break; } else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES(count)) { buf->next = wq->bufs[i + 1]; buf->next->prev = buf; } else { buf->next = buf + 1; buf->next->prev = buf; buf++; } } } wq->to_use = wq->to_clean = wq->bufs[0]; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman23586.72%133.33%
Govindarajulu Varadarajan248.86%133.33%
Vasanthy Kolluri124.43%133.33%
Total271100.00%3100.00%


void vnic_wq_free(struct vnic_wq *wq) { struct vnic_dev *vdev; unsigned int i; vdev = wq->vdev; vnic_dev_free_desc_ring(vdev, &wq->ring); for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) { if (wq->bufs[i]) { kfree(wq->bufs[i]); wq->bufs[i] = NULL; } } wq->ctrl = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman7587.21%150.00%
Roopa Prabhu1112.79%150.00%
Total86100.00%2100.00%


int vnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int index, unsigned int desc_count, unsigned int desc_size) { int err; wq->index = index; wq->vdev = vdev; wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_WQ, index); if (!wq->ctrl) { vdev_err(vdev, "Failed to hook WQ[%d] resource\n", index); return -EINVAL; } vnic_wq_disable(wq); err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size); if (err) return err; err = vnic_wq_alloc_bufs(wq); if (err) { vnic_wq_free(wq); return err; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman12697.67%133.33%
Joe Perches21.55%133.33%
Govindarajulu Varadarajan10.78%133.33%
Total129100.00%3100.00%


int enic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, unsigned int desc_count, unsigned int desc_size) { int err; wq->index = 0; wq->vdev = vdev; wq->ctrl = vnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); if (!wq->ctrl) return -EINVAL; vnic_wq_disable(wq); err = vnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, desc_size); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Govindarajulu Varadarajan8598.84%150.00%
David S. Miller11.16%150.00%
Total86100.00%2100.00%


void enic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index, unsigned int fetch_index, unsigned int posted_index, unsigned int error_interrupt_enable, unsigned int error_interrupt_offset) { u64 paddr; unsigned int count = wq->ring.desc_count; paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET; writeq(paddr, &wq->ctrl->ring_base); iowrite32(count, &wq->ctrl->ring_size); iowrite32(fetch_index, &wq->ctrl->fetch_index); iowrite32(posted_index, &wq->ctrl->posted_index); iowrite32(cq_index, &wq->ctrl->cq_index); iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable); iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset); iowrite32(0, &wq->ctrl->error_status); wq->to_use = wq->to_clean = &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)] [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)]; }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman16390.06%250.00%
Vasanthy Kolluri179.39%125.00%
David S. Miller10.55%125.00%
Total181100.00%4100.00%


void vnic_wq_init(struct vnic_wq *wq, unsigned int cq_index, unsigned int error_interrupt_enable, unsigned int error_interrupt_offset) { enic_wq_init_start(wq, cq_index, 0, 0, error_interrupt_enable, error_interrupt_offset); }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman3697.30%266.67%
David S. Miller12.70%133.33%
Total37100.00%3100.00%


unsigned int vnic_wq_error_status(struct vnic_wq *wq) { return ioread32(&wq->ctrl->error_status); }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman22100.00%1100.00%
Total22100.00%1100.00%


void vnic_wq_enable(struct vnic_wq *wq) { iowrite32(1, &wq->ctrl->enable); }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman22100.00%1100.00%
Total22100.00%1100.00%


int vnic_wq_disable(struct vnic_wq *wq) { unsigned int wait; struct vnic_dev *vdev = wq->vdev; iowrite32(0, &wq->ctrl->enable); /* Wait for HW to ACK disable request */ for (wait = 0; wait < 1000; wait++) { if (!(ioread32(&wq->ctrl->running))) return 0; udelay(10); } vdev_neterr(vdev, "Failed to disable WQ[%d]\n", wq->index); return -ETIMEDOUT; }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman7584.27%125.00%
Govindarajulu Varadarajan1011.24%125.00%
Joe Perches22.25%125.00%
Vasanthy Kolluri22.25%125.00%
Total89100.00%4100.00%


void vnic_wq_clean(struct vnic_wq *wq, void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf)) { struct vnic_wq_buf *buf; buf = wq->to_clean; while (vnic_wq_desc_used(wq) > 0) { (*buf_clean)(wq, buf); buf = wq->to_clean = buf->next; wq->ring.desc_avail++; } wq->to_use = wq->to_clean = wq->bufs[0]; iowrite32(0, &wq->ctrl->fetch_index); iowrite32(0, &wq->ctrl->posted_index); iowrite32(0, &wq->ctrl->error_status); vnic_dev_clear_desc_ring(&wq->ring); }

Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman135100.00%1100.00%
Total135100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Scott Feldman91083.79%216.67%
Govindarajulu Varadarajan12311.33%325.00%
Vasanthy Kolluri322.95%325.00%
Roopa Prabhu111.01%18.33%
Joe Perches40.37%18.33%
David S. Miller30.28%18.33%
Tejun Heo30.28%18.33%
Total1086100.00%12100.00%
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