MLX4_CATAS_POLL_INTERVAL = 5 * HZ,
};
-static DEFINE_SPINLOCK(catas_lock);
-static LIST_HEAD(catas_list);
-static struct work_struct catas_work;
-static int internal_err_reset = 1;
-module_param(internal_err_reset, int, 0644);
+int mlx4_internal_err_reset = 1;
+module_param_named(internal_err_reset, mlx4_internal_err_reset, int, 0644);
MODULE_PARM_DESC(internal_err_reset,
- "Reset device on internal errors if non-zero"
- " (default 1, in SRIOV mode default is 0)");
+ "Reset device on internal errors if non-zero (default 1)");
+
+static int read_vendor_id(struct mlx4_dev *dev)
+{
+ u16 vendor_id = 0;
+ int ret;
+
+ ret = pci_read_config_word(dev->persist->pdev, 0, &vendor_id);
+ if (ret) {
+ mlx4_err(dev, "Failed to read vendor ID, ret=%d\n", ret);
+ return ret;
+ }
+
+ if (vendor_id == 0xffff) {
+ mlx4_err(dev, "PCI can't be accessed to read vendor id\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mlx4_reset_master(struct mlx4_dev *dev)
+{
+ int err = 0;
+
+ if (mlx4_is_master(dev))
+ mlx4_report_internal_err_comm_event(dev);
+
+ if (!pci_channel_offline(dev->persist->pdev)) {
+ err = read_vendor_id(dev);
+ /* If PCI can't be accessed to read vendor ID we assume that its
+ * link was disabled and chip was already reset.
+ */
+ if (err)
+ return 0;
+
+ err = mlx4_reset(dev);
+ if (err)
+ mlx4_err(dev, "Fail to reset HCA\n");
+ }
+
+ return err;
+}
+
+static int mlx4_reset_slave(struct mlx4_dev *dev)
+{
+#define COM_CHAN_RST_REQ_OFFSET 0x10
+#define COM_CHAN_RST_ACK_OFFSET 0x08
+
+ u32 comm_flags;
+ u32 rst_req;
+ u32 rst_ack;
+ unsigned long end;
+ struct mlx4_priv *priv = mlx4_priv(dev);
+
+ if (pci_channel_offline(dev->persist->pdev))
+ return 0;
+
+ comm_flags = swab32(readl((__iomem char *)priv->mfunc.comm +
+ MLX4_COMM_CHAN_FLAGS));
+ if (comm_flags == 0xffffffff) {
+ mlx4_err(dev, "VF reset is not needed\n");
+ return 0;
+ }
+
+ if (!(dev->caps.vf_caps & MLX4_VF_CAP_FLAG_RESET)) {
+ mlx4_err(dev, "VF reset is not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ rst_req = (comm_flags & (u32)(1 << COM_CHAN_RST_REQ_OFFSET)) >>
+ COM_CHAN_RST_REQ_OFFSET;
+ rst_ack = (comm_flags & (u32)(1 << COM_CHAN_RST_ACK_OFFSET)) >>
+ COM_CHAN_RST_ACK_OFFSET;
+ if (rst_req != rst_ack) {
+ mlx4_err(dev, "Communication channel isn't sync, fail to send reset\n");
+ return -EIO;
+ }
+
+ rst_req ^= 1;
+ mlx4_warn(dev, "VF is sending reset request to Firmware\n");
+ comm_flags = rst_req << COM_CHAN_RST_REQ_OFFSET;
+ __raw_writel((__force u32)cpu_to_be32(comm_flags),
+ (__iomem char *)priv->mfunc.comm + MLX4_COMM_CHAN_FLAGS);
+ /* Make sure that our comm channel write doesn't
+ * get mixed in with writes from another CPU.
+ */
+ mmiowb();
+
+ end = msecs_to_jiffies(MLX4_COMM_TIME) + jiffies;
+ while (time_before(jiffies, end)) {
+ comm_flags = swab32(readl((__iomem char *)priv->mfunc.comm +
+ MLX4_COMM_CHAN_FLAGS));
+ rst_ack = (comm_flags & (u32)(1 << COM_CHAN_RST_ACK_OFFSET)) >>
+ COM_CHAN_RST_ACK_OFFSET;
+
+ /* Reading rst_req again since the communication channel can
+ * be reset at any time by the PF and all its bits will be
+ * set to zero.
+ */
+ rst_req = (comm_flags & (u32)(1 << COM_CHAN_RST_REQ_OFFSET)) >>
+ COM_CHAN_RST_REQ_OFFSET;
+
+ if (rst_ack == rst_req) {
+ mlx4_warn(dev, "VF Reset succeed\n");
+ return 0;
+ }
+ cond_resched();
+ }
+ mlx4_err(dev, "Fail to send reset over the communication channel\n");
+ return -ETIMEDOUT;
+}
+
+static int mlx4_comm_internal_err(u32 slave_read)
+{
+ return (u32)COMM_CHAN_EVENT_INTERNAL_ERR ==
+ (slave_read & (u32)COMM_CHAN_EVENT_INTERNAL_ERR) ? 1 : 0;
+}
+
+void mlx4_enter_error_state(struct mlx4_dev_persistent *persist)
+{
+ int err;
+ struct mlx4_dev *dev;
+
+ if (!mlx4_internal_err_reset)
+ return;
+
+ mutex_lock(&persist->device_state_mutex);
+ if (persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR)
+ goto out;
+
+ dev = persist->dev;
+ mlx4_err(dev, "device is going to be reset\n");
+ if (mlx4_is_slave(dev))
+ err = mlx4_reset_slave(dev);
+ else
+ err = mlx4_reset_master(dev);
+ BUG_ON(err != 0);
+
+ dev->persist->state |= MLX4_DEVICE_STATE_INTERNAL_ERROR;
+ mlx4_err(dev, "device was reset successfully\n");
+ mutex_unlock(&persist->device_state_mutex);
+
+ /* At that step HW was already reset, now notify clients */
+ mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
+ mlx4_cmd_wake_completions(dev);
+ return;
+
+out:
+ mutex_unlock(&persist->device_state_mutex);
+}
+
+static void mlx4_handle_error_state(struct mlx4_dev_persistent *persist)
+{
+ int err = 0;
+
+ mlx4_enter_error_state(persist);
+ mutex_lock(&persist->interface_state_mutex);
+ if (persist->interface_state & MLX4_INTERFACE_STATE_UP &&
+ !(persist->interface_state & MLX4_INTERFACE_STATE_DELETION)) {
+ err = mlx4_restart_one(persist->pdev);
+ mlx4_info(persist->dev, "mlx4_restart_one was ended, ret=%d\n",
+ err);
+ }
+ mutex_unlock(&persist->interface_state_mutex);
+}
static void dump_err_buf(struct mlx4_dev *dev)
{
{
struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr;
struct mlx4_priv *priv = mlx4_priv(dev);
+ u32 slave_read;
- if (readl(priv->catas_err.map)) {
- /* If the device is off-line, we cannot try to recover it */
- if (pci_channel_offline(dev->pdev))
- mod_timer(&priv->catas_err.timer,
- round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
- else {
- dump_err_buf(dev);
- mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
-
- if (internal_err_reset) {
- spin_lock(&catas_lock);
- list_add(&priv->catas_err.list, &catas_list);
- spin_unlock(&catas_lock);
-
- queue_work(mlx4_wq, &catas_work);
- }
+ if (mlx4_is_slave(dev)) {
+ slave_read = swab32(readl(&priv->mfunc.comm->slave_read));
+ if (mlx4_comm_internal_err(slave_read)) {
+ mlx4_warn(dev, "Internal error detected on the communication channel\n");
+ goto internal_err;
}
- } else
- mod_timer(&priv->catas_err.timer,
- round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
+ } else if (readl(priv->catas_err.map)) {
+ dump_err_buf(dev);
+ goto internal_err;
+ }
+
+ if (dev->persist->state & MLX4_DEVICE_STATE_INTERNAL_ERROR) {
+ mlx4_warn(dev, "Internal error mark was detected on device\n");
+ goto internal_err;
+ }
+
+ mod_timer(&priv->catas_err.timer,
+ round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
+ return;
+
+internal_err:
+ if (mlx4_internal_err_reset)
+ queue_work(dev->persist->catas_wq, &dev->persist->catas_work);
}
static void catas_reset(struct work_struct *work)
{
- struct mlx4_priv *priv, *tmppriv;
- struct mlx4_dev *dev;
+ struct mlx4_dev_persistent *persist =
+ container_of(work, struct mlx4_dev_persistent,
+ catas_work);
- LIST_HEAD(tlist);
- int ret;
-
- spin_lock_irq(&catas_lock);
- list_splice_init(&catas_list, &tlist);
- spin_unlock_irq(&catas_lock);
-
- list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {
- struct pci_dev *pdev = priv->dev.pdev;
-
- /* If the device is off-line, we cannot reset it */
- if (pci_channel_offline(pdev))
- continue;
-
- ret = mlx4_restart_one(priv->dev.pdev);
- /* 'priv' now is not valid */
- if (ret)
- pr_err("mlx4 %s: Reset failed (%d)\n",
- pci_name(pdev), ret);
- else {
- dev = pci_get_drvdata(pdev);
- mlx4_dbg(dev, "Reset succeeded\n");
- }
- }
+ mlx4_handle_error_state(persist);
}
void mlx4_start_catas_poll(struct mlx4_dev *dev)
struct mlx4_priv *priv = mlx4_priv(dev);
phys_addr_t addr;
- /*If we are in SRIOV the default of the module param must be 0*/
- if (mlx4_is_mfunc(dev))
- internal_err_reset = 0;
-
INIT_LIST_HEAD(&priv->catas_err.list);
init_timer(&priv->catas_err.timer);
priv->catas_err.map = NULL;
- addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
- priv->fw.catas_offset;
+ if (!mlx4_is_slave(dev)) {
+ addr = pci_resource_start(dev->persist->pdev,
+ priv->fw.catas_bar) +
+ priv->fw.catas_offset;
- priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
- if (!priv->catas_err.map) {
- mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
- (unsigned long long) addr);
- return;
+ priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
+ if (!priv->catas_err.map) {
+ mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
+ (unsigned long long)addr);
+ return;
+ }
}
priv->catas_err.timer.data = (unsigned long) dev;
del_timer_sync(&priv->catas_err.timer);
- if (priv->catas_err.map)
+ if (priv->catas_err.map) {
iounmap(priv->catas_err.map);
+ priv->catas_err.map = NULL;
+ }
- spin_lock_irq(&catas_lock);
- list_del(&priv->catas_err.list);
- spin_unlock_irq(&catas_lock);
+ if (dev->persist->interface_state & MLX4_INTERFACE_STATE_DELETION)
+ flush_workqueue(dev->persist->catas_wq);
}
-void __init mlx4_catas_init(void)
+int mlx4_catas_init(struct mlx4_dev *dev)
{
- INIT_WORK(&catas_work, catas_reset);
+ INIT_WORK(&dev->persist->catas_work, catas_reset);
+ dev->persist->catas_wq = create_singlethread_workqueue("mlx4_health");
+ if (!dev->persist->catas_wq)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void mlx4_catas_end(struct mlx4_dev *dev)
+{
+ if (dev->persist->catas_wq) {
+ destroy_workqueue(dev->persist->catas_wq);
+ dev->persist->catas_wq = NULL;
+ }
}
projects / cascardo / linux.git / blobdiff