int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
u64 *a0, u64 *a1, int wait)
{
struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
int delay;
u32 status;
int dev_cmd_err[] = {
/* convert from fw's version of error.h to host's version */
0, /* ERR_SUCCESS */
EINVAL, /* ERR_EINVAL */
EFAULT, /* ERR_EFAULT */
EPERM, /* ERR_EPERM */
EBUSY, /* ERR_EBUSY */
};
int err;
status = ioread32(&devcmd->status);
if (status & STAT_BUSY) {
printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
return -EBUSY;
}
if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
writeq(*a0, &devcmd->args[0]);
writeq(*a1, &devcmd->args[1]);
wmb();
}
iowrite32(cmd, &devcmd->cmd);
if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
return 0;
for (delay = 0; delay < wait; delay++) {
udelay(100);
status = ioread32(&devcmd->status);
if (!(status & STAT_BUSY)) {
if (status & STAT_ERROR) {
err = dev_cmd_err[(int)readq(&devcmd->args[0])];
printk(KERN_ERR "Error %d devcmd %d\n",
err, _CMD_N(cmd));
return -err;
}
if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
rmb();
*a0 = readq(&devcmd->args[0]);
*a1 = readq(&devcmd->args[1]);
}
return 0;
}
}
printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
return -ETIMEDOUT;
}
int vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
u64 *a0, u64 *a1, int wait)
{
struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
int delay;
u32 status;
int err;
status = ioread32(&devcmd->status);
if (status & STAT_BUSY) {
printk(KERN_ERR "Busy devcmd %d\n", _CMD_N(cmd));
return -EBUSY;
}
if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
writeq(*a0, &devcmd->args[0]);
writeq(*a1, &devcmd->args[1]);
wmb();
}
iowrite32(cmd, &devcmd->cmd);
if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
return 0;
for (delay = 0; delay < wait; delay++) {
udelay(100);
status = ioread32(&devcmd->status);
if (!(status & STAT_BUSY)) {
if (status & STAT_ERROR) {
err = (int)readq(&devcmd->args[0]);
if (err != ERR_ECMDUNKNOWN ||
cmd != CMD_CAPABILITY)
printk(KERN_ERR "Error %d devcmd %d\n",
err, _CMD_N(cmd));
return err;
}
if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
rmb();
*a0 = readq(&devcmd->args[0]);
*a1 = readq(&devcmd->args[1]);
}
return 0;
}
}
printk(KERN_ERR "Timedout devcmd %d\n", _CMD_N(cmd));
return -ETIMEDOUT;
}
static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
u64 *a0, u64 *a1, int wait)
{
u32 status;
int err;
memset(vdev->args, 0, sizeof(vdev->args));
vdev->args[0] = vdev->proxy_index;
vdev->args[1] = cmd;
vdev->args[2] = *a0;
vdev->args[3] = *a1;
err = _vnic_dev_cmd(vdev, proxy_cmd, wait);
if (err)
return err;
status = (u32)vdev->args[0];
if (status & STAT_ERROR) {
err = (int)vdev->args[1];
if (err != ERR_ECMDUNKNOWN ||
cmd != CMD_CAPABILITY)
pr_err("Error %d proxy devcmd %d\n", err, _CMD_N(cmd));
return err;
}
*a0 = vdev->args[1];
*a1 = vdev->args[2];
return 0;
}
static int vnic_dev_cmd_proxy(struct vnic_dev *vdev,
enum vnic_devcmd_cmd proxy_cmd, enum vnic_devcmd_cmd cmd,
u64 *args, int nargs, int wait)
{
u32 status;
int err;
/*
* Proxy command consumes 2 arguments. One for proxy index,
* the other is for command to be proxied
*/
if (nargs > VNIC_DEVCMD_NARGS - 2) {
pr_err("number of args %d exceeds the maximum\n", nargs);
return -EINVAL;
}
memset(vdev->args, 0, sizeof(vdev->args));
vdev->args[0] = vdev->proxy_index;
vdev->args[1] = cmd;
memcpy(&vdev->args[2], args, nargs * sizeof(args[0]));
err = (*vdev->devcmd_rtn)(vdev, proxy_cmd, wait);
if (err)
return err;
status = (u32)vdev->args[0];
if (status & STAT_ERROR) {
err = (int)vdev->args[1];
if (err != ERR_ECMDUNKNOWN ||
cmd != CMD_CAPABILITY)
pr_err("Error %d proxy devcmd %d\n", err, _CMD_N(cmd));
return err;
}
memcpy(args, &vdev->args[1], nargs * sizeof(args[0]));
return 0;
}
int vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
int wait)
{
struct devcmd2_controller *dc2c = vdev->devcmd2;
struct devcmd2_result *result;
u8 color;
unsigned int i;
int delay;
int err;
u32 fetch_index;
u32 posted;
u32 new_posted;
posted = ioread32(&dc2c->wq_ctrl->posted_index);
fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index);
if (posted == 0xFFFFFFFF || fetch_index == 0xFFFFFFFF) {
/* Hardware surprise removal: return error */
pr_err("%s: devcmd2 invalid posted or fetch index on cmd %d\n",
pci_name(vdev->pdev), _CMD_N(cmd));
pr_err("%s: fetch index: %u, posted index: %u\n",
pci_name(vdev->pdev), fetch_index, posted);
return -ENODEV;
}
new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
if (new_posted == fetch_index) {
pr_err("%s: devcmd2 wq full while issuing cmd %d\n",
pci_name(vdev->pdev), _CMD_N(cmd));
pr_err("%s: fetch index: %u, posted index: %u\n",
pci_name(vdev->pdev), fetch_index, 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;
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("%s:Error %d devcmd %d\n",
pci_name(vdev->pdev),
err, _CMD_N(cmd));
return err;
}
if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
rmb(); /*prevent reorder while reding result*/
for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
vdev->args[i] = result->results[i];
}
return 0;
}
}
pr_err("%s:Timed out devcmd %d\n", pci_name(vdev->pdev), _CMD_N(cmd));
return -ETIMEDOUT;
}
static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
int wait)
{
struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
unsigned int i;
int delay;
u32 status;
int err;
status = ioread32(&devcmd->status);
if (status == 0xFFFFFFFF) {
/* PCI-e target device is gone */
return -ENODEV;
}
if (status & STAT_BUSY) {
pr_err("Busy devcmd %d\n", _CMD_N(cmd));
return -EBUSY;
}
if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
writeq(vdev->args[i], &devcmd->args[i]);
wmb();
}
iowrite32(cmd, &devcmd->cmd);
if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
return 0;
for (delay = 0; delay < wait; delay++) {
udelay(100);
status = ioread32(&devcmd->status);
if (status == 0xFFFFFFFF) {
/* PCI-e target device is gone */
return -ENODEV;
}
if (!(status & STAT_BUSY)) {
if (status & STAT_ERROR) {
err = (int)readq(&devcmd->args[0]);
if (err == ERR_EINVAL &&
cmd == CMD_CAPABILITY)
return -err;
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) {
rmb();
for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
vdev->args[i] = readq(&devcmd->args[i]);
}
return 0;
}
}
pr_err("Timedout devcmd %d\n", _CMD_N(cmd));
return -ETIMEDOUT;
}
static int _vnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
int wait)
{
#if defined(CONFIG_MIPS) || defined(MGMT_VNIC)
return 0;
#else
struct vnic_devcmd __iomem *devcmd = vdev->devcmd;
unsigned int i;
int delay;
u32 status;
int err;
status = ioread32(&devcmd->status);
if (status == 0xFFFFFFFF) {
/* PCI-e target device is gone */
return -ENODEV;
}
if (status & STAT_BUSY) {
#ifndef __WINDOWS__
pr_err("%s: Busy devcmd %d\n",
pci_name(vdev->pdev), _CMD_N(cmd));
#else
pr_err("Busy devcmd %d\n", _CMD_N(cmd));
#endif
return -EBUSY;
}
if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) {
for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
writeq(vdev->args[i], &devcmd->args[i]);
wmb();
}
iowrite32(cmd, &devcmd->cmd);
if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT))
return 0;
for (delay = 0; delay < wait; delay++) {
udelay(100);
status = ioread32(&devcmd->status);
if (status == 0xFFFFFFFF) {
/* PCI-e target device is gone */
return -ENODEV;
}
if (!(status & STAT_BUSY)) {
if (status & STAT_ERROR) {
err = -(int)readq(&devcmd->args[0]);
if (cmd != CMD_CAPABILITY)
#ifndef __WINDOWS__
pr_err("%s: Devcmd %d failed "
"with error code %d\n",
pci_name(vdev->pdev),
_CMD_N(cmd), err);
#else
pr_err("Devcmd %d failed "
"with error code %d\n",
_CMD_N(cmd), err);
#endif
return err;
}
if (_CMD_DIR(cmd) & _CMD_DIR_READ) {
rmb();
for (i = 0; i < VNIC_DEVCMD_NARGS; i++)
vdev->args[i] = readq(&devcmd->args[i]);
}
return 0;
}
}
#ifndef __WINDOWS__
pr_err("%s: Timedout devcmd %d\n",
pci_name(vdev->pdev), _CMD_N(cmd));
#else
pr_err("Timedout devcmd %d\n", _CMD_N(cmd));
#endif
return -ETIMEDOUT;
#endif
}
static int _vnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd,
int wait)
{
struct devcmd2_controller *dc2c = vdev->devcmd2;
struct devcmd2_result *result;
u8 color;
unsigned int i;
int delay, err;
u32 fetch_index, new_posted;
u32 posted = dc2c->posted;
fetch_index = ioread32(&dc2c->wq_ctrl->fetch_index);
if (fetch_index == 0xFFFFFFFF)
return -ENODEV;
new_posted = (posted + 1) % DEVCMD2_RING_SIZE;
if (new_posted == fetch_index) {
vdev_neterr(vdev, "devcmd2 %d: wq is full. fetch index: %u, posted index: %u\n",
_CMD_N(cmd), fetch_index, 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);
dc2c->posted = new_posted;
if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT)
return 0;
result = dc2c->result + dc2c->next_result;
color = dc2c->color;
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++) {
if (result->color == color) {
if (result->error) {
err = result->error;
if (err != ERR_ECMDUNKNOWN ||
cmd != CMD_CAPABILITY)
vdev_neterr(vdev, "Error %d devcmd %d\n",
err, _CMD_N(cmd));
return -err;
}
if (_CMD_DIR(cmd) & _CMD_DIR_READ)
for (i = 0; i < VNIC_DEVCMD2_NARGS; i++)
vdev->args[i] = result->results[i];
return 0;
}
udelay(100);
}
vdev_neterr(vdev, "devcmd %d timed out\n", _CMD_N(cmd));
return -ETIMEDOUT;
}
