Orange Pi5 kernel

/*
 * Copyright 2014 Cisco 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/if_ether.h>
#include <linux/slab.h>
#include "vnic_resource.h"
#include "vnic_devcmd.h"
#include "vnic_dev.h"
#include "vnic_stats.h"
#include "vnic_wq.h"
 
#define VNIC_DVCMD_TMO	10000	/* Devcmd Timeout value */
#define VNIC_NOTIFY_INTR_MASK 0x0000ffff00000000ULL
 
struct devcmd2_controller {
<------>struct vnic_wq_ctrl __iomem *wq_ctrl;
<------>struct vnic_dev_ring results_ring;
<------>struct vnic_wq wq;
<------>struct vnic_devcmd2 *cmd_ring;
<------>struct devcmd2_result *result;
<------>u16 next_result;
<------>u16 result_size;
<------>int color;
};
 
struct vnic_res {
<------>void __iomem *vaddr;
<------>unsigned int count;
};
 
struct vnic_dev {
<------>void *priv;
<------>struct pci_dev *pdev;
<------>struct vnic_res res[RES_TYPE_MAX];
<------>enum vnic_dev_intr_mode intr_mode;
<------>struct vnic_devcmd __iomem *devcmd;
<------>struct vnic_devcmd_notify *notify;
<------>struct vnic_devcmd_notify notify_copy;
<------>dma_addr_t notify_pa;
<------>u32 *linkstatus;
<------>dma_addr_t linkstatus_pa;
<------>struct vnic_stats *stats;
<------>dma_addr_t stats_pa;
<------>struct vnic_devcmd_fw_info *fw_info;
<------>dma_addr_t fw_info_pa;
<------>u64 args[VNIC_DEVCMD_NARGS];
<------>struct devcmd2_controller *devcmd2;
 
<------>int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
<------><------><------>  int wait);
};
 
#define VNIC_MAX_RES_HDR_SIZE \
<------>(sizeof(struct vnic_resource_header) + \
<------>sizeof(struct vnic_resource) * RES_TYPE_MAX)
#define VNIC_RES_STRIDE	128
 
void *svnic_dev_priv(struct vnic_dev *vdev)
{
<------>return vdev->priv;
}
 
static int vnic_dev_discover_res(struct vnic_dev *vdev,
<------>struct vnic_dev_bar *bar, unsigned int num_bars)
{
<------>struct vnic_resource_header __iomem *rh;
<------>struct vnic_resource __iomem *r;
<------>u8 type;
 
<------>if (num_bars == 0)
<------><------>return -EINVAL;
 
<------>if (bar->len < VNIC_MAX_RES_HDR_SIZE) {
<------><------>pr_err("vNIC BAR0 res hdr length error\n");
 
<------><------>return -EINVAL;
<------>}
 
<------>rh = bar->vaddr;
<------>if (!rh) {
<------><------>pr_err("vNIC BAR0 res hdr not mem-mapped\n");
 
<------><------>return -EINVAL;
<------>}
 
<------>if (ioread32(&rh->magic) != VNIC_RES_MAGIC ||
<------>    ioread32(&rh->version) != VNIC_RES_VERSION) {
<------><------>pr_err("vNIC BAR0 res magic/version error exp (%lx/%lx) curr (%x/%x)\n",
<------><------><------>VNIC_RES_MAGIC, VNIC_RES_VERSION,
<------><------><------>ioread32(&rh->magic), ioread32(&rh->version));
 
<------><------>return -EINVAL;
<------>}
 
<------>r = (struct vnic_resource __iomem *)(rh + 1);
 
<------>while ((type = ioread8(&r->type)) != RES_TYPE_EOL) {
 
<------><------>u8 bar_num = ioread8(&r->bar);
<------><------>u32 bar_offset = ioread32(&r->bar_offset);
<------><------>u32 count = ioread32(&r->count);
<------><------>u32 len;
 
<------><------>r++;
 
<------><------>if (bar_num >= num_bars)
<------><------><------>continue;
 
<------><------>if (!bar[bar_num].len || !bar[bar_num].vaddr)
<------><------><------>continue;
 
<------><------>switch (type) {
<------><------>case RES_TYPE_WQ:
<------><------>case RES_TYPE_RQ:
<------><------>case RES_TYPE_CQ:
<------><------>case RES_TYPE_INTR_CTRL:
<------><------><------>/* each count is stride bytes long */
<------><------><------>len = count * VNIC_RES_STRIDE;
<------><------><------>if (len + bar_offset > bar->len) {
<------><------><------><------>pr_err("vNIC BAR0 resource %d out-of-bounds, offset 0x%x + size 0x%x > bar len 0x%lx\n",
<------><------><------><------><------>type, bar_offset,
<------><------><------><------><------>len,
<------><------><------><------><------>bar->len);
 
<------><------><------><------>return -EINVAL;
<------><------><------>}
<------><------><------>break;
 
<------><------>case RES_TYPE_INTR_PBA_LEGACY:
<------><------>case RES_TYPE_DEVCMD:
<------><------>case RES_TYPE_DEVCMD2:
<------><------><------>len = count;
<------><------><------>break;
 
<------><------>default:
<------><------><------>continue;
<------><------>}
 
<------><------>vdev->res[type].count = count;
<------><------>vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset;
<------>}
 
<------>return 0;
}
 
unsigned int svnic_dev_get_res_count(struct vnic_dev *vdev,
<------>enum vnic_res_type type)
{
<------>return vdev->res[type].count;
}
 
void __iomem *svnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type,
<------>unsigned int index)
{
<------>if (!vdev->res[type].vaddr)
<------><------>return NULL;
 
<------>switch (type) {
<------>case RES_TYPE_WQ:
<------>case RES_TYPE_RQ:
<------>case RES_TYPE_CQ:
<------>case RES_TYPE_INTR_CTRL:
<------><------>return (char __iomem *)vdev->res[type].vaddr +
<------><------><------><------><------>index * VNIC_RES_STRIDE;
 
<------>default:
<------><------>return (char __iomem *)vdev->res[type].vaddr;
<------>}
}
 
unsigned int svnic_dev_desc_ring_size(struct vnic_dev_ring *ring,
<------><------><------><------>      unsigned int desc_count,
<------><------><------><------>      unsigned int desc_size)
{
<------>/* The base address of the desc rings must be 512 byte aligned.
<------> * Descriptor count is aligned to groups of 32 descriptors.  A
<------> * count of 0 means the maximum 4096 descriptors.  Descriptor
<------> * size is aligned to 16 bytes.
<------> */
 
<------>unsigned int count_align = 32;
<------>unsigned int desc_align = 16;
 
<------>ring->base_align = 512;
 
<------>if (desc_count == 0)
<------><------>desc_count = 4096;
 
<------>ring->desc_count = ALIGN(desc_count, count_align);
 
<------>ring->desc_size = ALIGN(desc_size, desc_align);
 
<------>ring->size = ring->desc_count * ring->desc_size;
<------>ring->size_unaligned = ring->size + ring->base_align;
 
<------>return ring->size_unaligned;
}
 
void svnic_dev_clear_desc_ring(struct vnic_dev_ring *ring)
{
<------>memset(ring->descs, 0, ring->size);
}
 
int svnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring,
<------>unsigned int desc_count, unsigned int desc_size)
{
<------>svnic_dev_desc_ring_size(ring, desc_count, desc_size);
 
<------>ring->descs_unaligned = dma_alloc_coherent(&vdev->pdev->dev,
<------><------><------>ring->size_unaligned, &ring->base_addr_unaligned,
<------><------><------>GFP_KERNEL);
<------>if (!ring->descs_unaligned) {
<------><------>pr_err("Failed to allocate ring (size=%d), aborting\n",
<------><------><------>(int)ring->size);
 
<------><------>return -ENOMEM;
<------>}
 
<------>ring->base_addr = ALIGN(ring->base_addr_unaligned,
<------><------>ring->base_align);
<------>ring->descs = (u8 *)ring->descs_unaligned +
<------><------>(ring->base_addr - ring->base_addr_unaligned);
 
<------>svnic_dev_clear_desc_ring(ring);
 
<------>ring->desc_avail = ring->desc_count - 1;
 
<------>return 0;
}
 
void svnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring)
{
<------>if (ring->descs) {
<------><------>dma_free_coherent(&vdev->pdev->dev,
<------><------><------>ring->size_unaligned,
<------><------><------>ring->descs_unaligned,
<------><------><------>ring->base_addr_unaligned);
<------><------>ring->descs = NULL;
<------>}
}
 
static int _svnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
<------>int wait)
{
<------>struct devcmd2_controller *dc2c = vdev->devcmd2;
<------>struct devcmd2_result *result = NULL;
<------>unsigned int i;
<------>int delay;
<------>int err;
<------>u32 posted;
<------>u32 fetch_idx;
<------>u32 new_posted;
<------>u8 color;
 
<------>fetch_idx = ioread32(&dc2c->wq_ctrl->fetch_index);
<------>if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone  */
<------><------>/* Hardware surprise removal: return error */
<------><------>return -ENODEV;
<------>}
 
<------>posted = ioread32(&dc2c->wq_ctrl->posted_index);
 
<------>if (posted == 0xFFFFFFFF) { /* check for hardware gone  */
<------><------>/* Hardware surprise removal: return error */
<------><------>return -ENODEV;
<------>}
 
<------>new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
<------>if (new_posted == fetch_idx) {
<------><------>pr_err("%s: wq is full while issuing devcmd2 command %d, fetch index: %u, posted index: %u\n",
<------><------><------>pci_name(vdev->pdev), _CMD_N(cmd), fetch_idx, posted);
 
<------><------>return -EBUSY;
<------>}
 
<------>dc2c->cmd_ring[posted].cmd = cmd;
<------>dc2c->cmd_ring[posted].flags = 0;
 
<------>if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
<------><------>dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT;
 
<------>if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
<------><------>for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
<------><------><------>dc2c->cmd_ring[posted].args[i] = vdev->args[i];
<------>}
<------>/* Adding write memory barrier prevents compiler and/or CPU
<------> * reordering, thus avoiding descriptor posting before
<------> * descriptor is initialized. Otherwise, hardware can read
<------> * stale descriptor fields.
<------> */
<------>wmb();
<------>iowrite32(new_posted, &dc2c->wq_ctrl->posted_index);
 
<------>if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
<------><------>return 0;
 
<------>result = dc2c->result + dc2c->next_result;
<------>color = dc2c->color;
 
<------>/*
<------> * Increment next_result, after posting the devcmd, irrespective of
<------> * devcmd result, and it should be done only once.
<------> */
<------>dc2c->next_result++;
<------>if (dc2c->next_result == dc2c->result_size) {
<------><------>dc2c->next_result = 0;
<------><------>dc2c->color = dc2c->color ? 0 : 1;
<------>}
 
<------>for (delay = 0; delay < wait; delay++) {
<------><------>udelay(100);
<------><------>if (result->color == color) {
<------><------><------>if (result->error) {
<------><------><------><------>err = (int) result->error;
<------><------><------><------>if (err != ERR_ECMDUNKNOWN ||
<------><------><------><------>    cmd != CMD_CAPABILITY)
<------><------><------><------><------>pr_err("Error %d devcmd %d\n",
<------><------><------><------><------><------>err, _CMD_N(cmd));
 
<------><------><------><------>return err;
<------><------><------>}
<------><------><------>if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
<------><------><------><------>for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
<------><------><------><------><------>vdev->args[i] = result->results[i];
<------><------><------>}
 
<------><------><------>return 0;
<------><------>}
<------>}
 
<------>pr_err("Timed out devcmd %d\n", _CMD_N(cmd));
 
<------>return -ETIMEDOUT;
}
 
static int svnic_dev_init_devcmd2(struct vnic_dev *vdev)
{
<------>struct devcmd2_controller *dc2c = NULL;
<------>unsigned int fetch_idx;
<------>int ret;
<------>void __iomem *p;
 
<------>if (vdev->devcmd2)
<------><------>return 0;
 
<------>p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
<------>if (!p)
<------><------>return -ENODEV;
 
<------>dc2c = kzalloc(sizeof(*dc2c), GFP_ATOMIC);
<------>if (!dc2c)
<------><------>return -ENOMEM;
 
<------>vdev->devcmd2 = dc2c;
 
<------>dc2c->color = 1;
<------>dc2c->result_size = DEVCMD2_RING_SIZE;
 
<------>ret  = vnic_wq_devcmd2_alloc(vdev,
<------><------><------><------>     &dc2c->wq,
<------><------><------><------>     DEVCMD2_RING_SIZE,
<------><------><------><------>     DEVCMD2_DESC_SIZE);
<------>if (ret)
<------><------>goto err_free_devcmd2;
 
<------>fetch_idx = ioread32(&dc2c->wq.ctrl->fetch_index);
<------>if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone  */
<------><------>/* Hardware surprise removal: reset fetch_index */
<------><------>fetch_idx = 0;
<------>}
 
<------>/*
<------> * Don't change fetch_index ever and
<------> * set posted_index same as fetch_index
<------> * when setting up the WQ for devcmd2.
<------> */
<------>vnic_wq_init_start(&dc2c->wq, 0, fetch_idx, fetch_idx, 0, 0);
<------>svnic_wq_enable(&dc2c->wq);
<------>ret = svnic_dev_alloc_desc_ring(vdev,
<------><------><------><------><------>&dc2c->results_ring,
<------><------><------><------><------>DEVCMD2_RING_SIZE,
<------><------><------><------><------>DEVCMD2_DESC_SIZE);
<------>if (ret)
<------><------>goto err_free_wq;
 
<------>dc2c->result = (struct devcmd2_result *) dc2c->results_ring.descs;
<------>dc2c->cmd_ring = (struct vnic_devcmd2 *) dc2c->wq.ring.descs;
<------>dc2c->wq_ctrl = dc2c->wq.ctrl;
<------>vdev->args[0] = (u64) dc2c->results_ring.base_addr | VNIC_PADDR_TARGET;
<------>vdev->args[1] = DEVCMD2_RING_SIZE;
 
<------>ret = _svnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, VNIC_DVCMD_TMO);
<------>if (ret < 0)
<------><------>goto err_free_desc_ring;
 
<------>vdev->devcmd_rtn = &_svnic_dev_cmd2;
<------>pr_info("DEVCMD2 Initialized.\n");
 
<------>return ret;
 
err_free_desc_ring:
<------>svnic_dev_free_desc_ring(vdev, &dc2c->results_ring);
 
err_free_wq:
<------>svnic_wq_disable(&dc2c->wq);
<------>svnic_wq_free(&dc2c->wq);
 
err_free_devcmd2:
<------>kfree(dc2c);
<------>vdev->devcmd2 = NULL;
 
<------>return ret;
} /* end of svnic_dev_init_devcmd2 */
 
static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev)
{
<------>struct devcmd2_controller *dc2c = vdev->devcmd2;
 
<------>vdev->devcmd2 = NULL;
<------>vdev->devcmd_rtn = NULL;
 
<------>svnic_dev_free_desc_ring(vdev, &dc2c->results_ring);
<------>svnic_wq_disable(&dc2c->wq);
<------>svnic_wq_free(&dc2c->wq);
<------>kfree(dc2c);
}
 
int svnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
<------>u64 *a0, u64 *a1, int wait)
{
<------>int err;
 
<------>memset(vdev->args, 0, sizeof(vdev->args));
<------>vdev->args[0] = *a0;
<------>vdev->args[1] = *a1;
 
<------>err = (*vdev->devcmd_rtn)(vdev, cmd, wait);
 
<------>*a0 = vdev->args[0];
<------>*a1 = vdev->args[1];
 
<------>return  err;
}
 
int svnic_dev_fw_info(struct vnic_dev *vdev,
<------>struct vnic_devcmd_fw_info **fw_info)
{
<------>u64 a0, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
<------>int err = 0;
 
<------>if (!vdev->fw_info) {
<------><------>vdev->fw_info = dma_alloc_coherent(&vdev->pdev->dev,
<------><------><------>sizeof(struct vnic_devcmd_fw_info),
<------><------><------>&vdev->fw_info_pa, GFP_KERNEL);
<------><------>if (!vdev->fw_info)
<------><------><------>return -ENOMEM;
 
<------><------>a0 = vdev->fw_info_pa;
 
<------><------>/* only get fw_info once and cache it */
<------><------>err = svnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait);
<------>}
 
<------>*fw_info = vdev->fw_info;
 
<------>return err;
}
 
int svnic_dev_spec(struct vnic_dev *vdev, unsigned int offset,
<------>unsigned int size, void *value)
{
<------>u64 a0, a1;
<------>int wait = VNIC_DVCMD_TMO;
<------>int err;
 
<------>a0 = offset;
<------>a1 = size;
 
<------>err = svnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait);
 
<------>switch (size) {
<------>case 1:
<------><------>*(u8 *)value = (u8)a0;
<------><------>break;
<------>case 2:
<------><------>*(u16 *)value = (u16)a0;
<------><------>break;
<------>case 4:
<------><------>*(u32 *)value = (u32)a0;
<------><------>break;
<------>case 8:
<------><------>*(u64 *)value = a0;
<------><------>break;
<------>default:
<------><------>BUG();
<------><------>break;
<------>}
 
<------>return err;
}
 
int svnic_dev_stats_clear(struct vnic_dev *vdev)
{
<------>u64 a0 = 0, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>return svnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait);
}
 
int svnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats)
{
<------>u64 a0, a1;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>if (!vdev->stats) {
<------><------>vdev->stats = dma_alloc_coherent(&vdev->pdev->dev,
<------><------><------>sizeof(struct vnic_stats), &vdev->stats_pa, GFP_KERNEL);
<------><------>if (!vdev->stats)
<------><------><------>return -ENOMEM;
<------>}
 
<------>*stats = vdev->stats;
<------>a0 = vdev->stats_pa;
<------>a1 = sizeof(struct vnic_stats);
 
<------>return svnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait);
}
 
int svnic_dev_close(struct vnic_dev *vdev)
{
<------>u64 a0 = 0, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>return svnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait);
}
 
int svnic_dev_enable_wait(struct vnic_dev *vdev)
{
<------>u64 a0 = 0, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
<------>int err = 0;
 
<------>err = svnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait);
<------>if (err == ERR_ECMDUNKNOWN)
<------><------>return svnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait);
 
<------>return err;
}
 
int svnic_dev_disable(struct vnic_dev *vdev)
{
<------>u64 a0 = 0, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>return svnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait);
}
 
int svnic_dev_open(struct vnic_dev *vdev, int arg)
{
<------>u64 a0 = (u32)arg, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>return svnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait);
}
 
int svnic_dev_open_done(struct vnic_dev *vdev, int *done)
{
<------>u64 a0 = 0, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
<------>int err;
 
<------>*done = 0;
 
<------>err = svnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait);
<------>if (err)
<------><------>return err;
 
<------>*done = (a0 == 0);
 
<------>return 0;
}
 
int svnic_dev_notify_set(struct vnic_dev *vdev, u16 intr)
{
<------>u64 a0, a1;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>if (!vdev->notify) {
<------><------>vdev->notify = dma_alloc_coherent(&vdev->pdev->dev,
<------><------><------>sizeof(struct vnic_devcmd_notify),
<------><------><------>&vdev->notify_pa, GFP_KERNEL);
<------><------>if (!vdev->notify)
<------><------><------>return -ENOMEM;
<------>}
 
<------>a0 = vdev->notify_pa;
<------>a1 = ((u64)intr << 32) & VNIC_NOTIFY_INTR_MASK;
<------>a1 += sizeof(struct vnic_devcmd_notify);
 
<------>return svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
}
 
void svnic_dev_notify_unset(struct vnic_dev *vdev)
{
<------>u64 a0, a1;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>a0 = 0;  /* paddr = 0 to unset notify buffer */
<------>a1 = VNIC_NOTIFY_INTR_MASK; /* intr num = -1 to unreg for intr */
<------>a1 += sizeof(struct vnic_devcmd_notify);
 
<------>svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait);
}
 
static int vnic_dev_notify_ready(struct vnic_dev *vdev)
{
<------>u32 *words;
<------>unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4;
<------>unsigned int i;
<------>u32 csum;
 
<------>if (!vdev->notify)
<------><------>return 0;
 
<------>do {
<------><------>csum = 0;
<------><------>memcpy(&vdev->notify_copy, vdev->notify,
<------><------><------>sizeof(struct vnic_devcmd_notify));
<------><------>words = (u32 *)&vdev->notify_copy;
<------><------>for (i = 1; i < nwords; i++)
<------><------><------>csum += words[i];
<------>} while (csum != words[0]);
 
<------>return 1;
}
 
int svnic_dev_init(struct vnic_dev *vdev, int arg)
{
<------>u64 a0 = (u32)arg, a1 = 0;
<------>int wait = VNIC_DVCMD_TMO;
 
<------>return svnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait);
}
 
int svnic_dev_link_status(struct vnic_dev *vdev)
{
<------>if (vdev->linkstatus)
<------><------>return *vdev->linkstatus;
 
<------>if (!vnic_dev_notify_ready(vdev))
<------><------>return 0;
 
<------>return vdev->notify_copy.link_state;
}
 
u32 svnic_dev_link_down_cnt(struct vnic_dev *vdev)
{
<------>if (!vnic_dev_notify_ready(vdev))
<------><------>return 0;
 
<------>return vdev->notify_copy.link_down_cnt;
}
 
void svnic_dev_set_intr_mode(struct vnic_dev *vdev,
<------>enum vnic_dev_intr_mode intr_mode)
{
<------>vdev->intr_mode = intr_mode;
}
 
enum vnic_dev_intr_mode svnic_dev_get_intr_mode(struct vnic_dev *vdev)
{
<------>return vdev->intr_mode;
}
 
void svnic_dev_unregister(struct vnic_dev *vdev)
{
<------>if (vdev) {
<------><------>if (vdev->notify)
<------><------><------>dma_free_coherent(&vdev->pdev->dev,
<------><------><------><------>sizeof(struct vnic_devcmd_notify),
<------><------><------><------>vdev->notify,
<------><------><------><------>vdev->notify_pa);
<------><------>if (vdev->linkstatus)
<------><------><------>dma_free_coherent(&vdev->pdev->dev,
<------><------><------><------>sizeof(u32),
<------><------><------><------>vdev->linkstatus,
<------><------><------><------>vdev->linkstatus_pa);
<------><------>if (vdev->stats)
<------><------><------>dma_free_coherent(&vdev->pdev->dev,
<------><------><------><------>sizeof(struct vnic_stats),
<------><------><------><------>vdev->stats, vdev->stats_pa);
<------><------>if (vdev->fw_info)
<------><------><------>dma_free_coherent(&vdev->pdev->dev,
<------><------><------><------>sizeof(struct vnic_devcmd_fw_info),
<------><------><------><------>vdev->fw_info, vdev->fw_info_pa);
<------><------>if (vdev->devcmd2)
<------><------><------>vnic_dev_deinit_devcmd2(vdev);
<------><------>kfree(vdev);
<------>}
}
 
struct vnic_dev *svnic_dev_alloc_discover(struct vnic_dev *vdev,
<------><------><------><------><------>  void *priv,
<------><------><------><------><------>  struct pci_dev *pdev,
<------><------><------><------><------>  struct vnic_dev_bar *bar,
<------><------><------><------><------>  unsigned int num_bars)
{
<------>if (!vdev) {
<------><------>vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC);
<------><------>if (!vdev)
<------><------><------>return NULL;
<------>}
 
<------>vdev->priv = priv;
<------>vdev->pdev = pdev;
 
<------>if (vnic_dev_discover_res(vdev, bar, num_bars))
<------><------>goto err_out;
 
<------>return vdev;
 
err_out:
<------>svnic_dev_unregister(vdev);
 
<------>return NULL;
} /* end of svnic_dev_alloc_discover */
 
/*
 * fallback option is left to keep the interface common for other vnics.
 */
int svnic_dev_cmd_init(struct vnic_dev *vdev, int fallback)
{
<------>int err = -ENODEV;
<------>void __iomem *p;
 
<------>p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0);
<------>if (p)
<------><------>err = svnic_dev_init_devcmd2(vdev);
<------>else
<------><------>pr_err("DEVCMD2 resource not found.\n");
 
<------>return err;
} /* end of svnic_dev_cmd_init */