iw_cxgb3: handle chip reset notifications

Freeze activity when notified that the underlying chip
is getting reset on a EEH event or fatal error.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 19 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/cxgb3/cxio_hal.c b/drivers/infiniband/hw/cxgb3/cxio_hal.c
index 4dcf08b3fd83..11efd3528ce4 100644
--- a/drivers/infiniband/hw/cxgb3/cxio_hal.c
+++ b/drivers/infiniband/hw/cxgb3/cxio_hal.c
@@ -701,6 +701,9 @@ static int __cxio_tpt_op(struct cxio_rdev *rdev_p, u32 reset_tpt_entry,
         u32 stag_idx;
         u32 wptr;
 
+        if (rdev_p->flags)
+                return -EIO;
+
         stag_state = stag_state > 0;
         stag_idx = (*stag) >> 8;
 
diff --git a/drivers/infiniband/hw/cxgb3/cxio_hal.h b/drivers/infiniband/hw/cxgb3/cxio_hal.h
index 656fe47bc84f..9ed65b055171 100644
--- a/drivers/infiniband/hw/cxgb3/cxio_hal.h
+++ b/drivers/infiniband/hw/cxgb3/cxio_hal.h
@@ -108,6 +108,8 @@ struct cxio_rdev {
         struct gen_pool *pbl_pool;
         struct gen_pool *rqt_pool;
         struct list_head entry;
+        u32     flags;
+#define CXIO_ERROR_FATAL        1
 };
 
 static inline int cxio_num_stags(struct cxio_rdev *rdev_p)
diff --git a/drivers/infiniband/hw/cxgb3/iwch.c b/drivers/infiniband/hw/cxgb3/iwch.c
index 4489c89d6710..37a4fc264a07 100644
--- a/drivers/infiniband/hw/cxgb3/iwch.c
+++ b/drivers/infiniband/hw/cxgb3/iwch.c
@@ -51,13 +51,15 @@ cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS];
 
 static void open_rnic_dev(struct t3cdev *);
 static void close_rnic_dev(struct t3cdev *);
+static void iwch_err_handler(struct t3cdev *, u32, u32);
 
 struct cxgb3_client t3c_client = {
         .name = "iw_cxgb3",
         .add = open_rnic_dev,
         .remove = close_rnic_dev,
         .handlers = t3c_handlers,
-        .redirect = iwch_ep_redirect
+        .redirect = iwch_ep_redirect,
+        .err_handler = iwch_err_handler
 };
 
 static LIST_HEAD(dev_list);
@@ -160,6 +162,17 @@ static void close_rnic_dev(struct t3cdev *tdev)
         mutex_unlock(&dev_mutex);
 }
 
+static void iwch_err_handler(struct t3cdev *tdev, u32 status, u32 error)
+{
+        struct cxio_rdev *rdev = tdev->ulp;
+
+        if (status == OFFLOAD_STATUS_DOWN)
+                rdev->flags = CXIO_ERROR_FATAL;
+
+        return;
+
+}
+
 static int __init iwch_init_module(void)
 {
         int err;