From f3be0cbc722c8de2f45c5d9f71f1b21da85554fd Mon Sep 17 00:00:00 2001
From: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Date: Wed, 21 Jun 2017 14:53:01 -0500
Subject: [PATCH] ibmvnic: Fix error handling when registering long-term-mapped
buffers
References: bsc#1045568
Patch-mainline: v4.13-rc1
Git-commit: f3be0cbc722c8de2f45c5d9f71f1b21da85554fd
The patch stores the return code of the REQUEST_MAP_RSP sub-CRQ command
in the private data structure, where it can be later checked during
device open or a reset.
In the case of a reset, the mapping request to the vNIC Server may fail,
especially in the case of a partition migration. The driver attempts to
handle this by re-allocating the buffer and re-sending the mapping request.
The original error handling implementation was removed. The separate
function handling the REQUEST_MAP response message was also removed,
since it is now simple enough to be handled in the ibmvnic_handle_crq
function.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/net/ethernet/ibm/ibmvnic.c | 79 ++++++++++++++++----------------------
drivers/net/ethernet/ibm/ibmvnic.h | 1 +
2 files changed, 35 insertions(+), 45 deletions(-)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 013509544632..aab69dd018d4 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -163,16 +163,6 @@ static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
return rc;
}
-static void reset_long_term_buff(struct ibmvnic_adapter *adapter,
- struct ibmvnic_long_term_buff *ltb)
-{
- memset(ltb->buff, 0, ltb->size);
-
- init_completion(&adapter->fw_done);
- send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
- wait_for_completion(&adapter->fw_done);
-}
-
static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
struct ibmvnic_long_term_buff *ltb, int size)
{
@@ -193,6 +183,12 @@ static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
send_request_map(adapter, ltb->addr,
ltb->size, ltb->map_id);
wait_for_completion(&adapter->fw_done);
+
+ if (adapter->fw_done_rc) {
+ dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
+ adapter->fw_done_rc);
+ return -1;
+ }
return 0;
}
@@ -210,6 +206,24 @@ static void free_long_term_buff(struct ibmvnic_adapter *adapter,
dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
}
+static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
+ struct ibmvnic_long_term_buff *ltb)
+{
+ memset(ltb->buff, 0, ltb->size);
+
+ init_completion(&adapter->fw_done);
+ send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
+ wait_for_completion(&adapter->fw_done);
+
+ if (adapter->fw_done_rc) {
+ dev_info(&adapter->vdev->dev,
+ "Reset failed, attempting to free and reallocate buffer\n");
+ free_long_term_buff(adapter, ltb);
+ return alloc_long_term_buff(adapter, ltb, ltb->size);
+ }
+ return 0;
+}
+
static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
{
int i;
@@ -366,13 +380,15 @@ static int reset_rx_pools(struct ibmvnic_adapter *adapter)
{
struct ibmvnic_rx_pool *rx_pool;
int rx_scrqs;
- int i, j;
+ int i, j, rc;
rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
for (i = 0; i < rx_scrqs; i++) {
rx_pool = &adapter->rx_pool[i];
- reset_long_term_buff(adapter, &rx_pool->long_term_buff);
+ rc = reset_long_term_buff(adapter, &rx_pool->long_term_buff);
+ if (rc)
+ return rc;
for (j = 0; j < rx_pool->size; j++)
rx_pool->free_map[j] = j;
@@ -494,13 +510,15 @@ static int reset_tx_pools(struct ibmvnic_adapter *adapter)
{
struct ibmvnic_tx_pool *tx_pool;
int tx_scrqs;
- int i, j;
+ int i, j, rc;
tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
for (i = 0; i < tx_scrqs; i++) {
tx_pool = &adapter->tx_pool[i];
- reset_long_term_buff(adapter, &tx_pool->long_term_buff);
+ rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
+ if (rc)
+ return rc;
memset(tx_pool->tx_buff, 0,
adapter->req_tx_entries_per_subcrq *
@@ -3075,36 +3093,6 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
return 0;
}
-static void handle_request_map_rsp(union ibmvnic_crq *crq,
- struct ibmvnic_adapter *adapter)
-{
- struct device *dev = &adapter->vdev->dev;
- u8 map_id = crq->request_map_rsp.map_id;
- int tx_subcrqs;
- int rx_subcrqs;
- long rc;
- int i;
-
- tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
- rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
-
- rc = crq->request_map_rsp.rc.code;
- if (rc) {
- dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc);
- adapter->map_id--;
- /* need to find and zero tx/rx_pool map_id */
- for (i = 0; i < tx_subcrqs; i++) {
- if (adapter->tx_pool[i].long_term_buff.map_id == map_id)
- adapter->tx_pool[i].long_term_buff.map_id = 0;
- }
- for (i = 0; i < rx_subcrqs; i++) {
- if (adapter->rx_pool[i].long_term_buff.map_id == map_id)
- adapter->rx_pool[i].long_term_buff.map_id = 0;
- }
- }
- complete(&adapter->fw_done);
-}
-
static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
struct ibmvnic_adapter *adapter)
{
@@ -3385,7 +3373,8 @@ static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
handle_query_map_rsp(crq, adapter);
break;
case REQUEST_MAP_RSP:
- handle_request_map_rsp(crq, adapter);
+ adapter->fw_done_rc = crq->request_map_rsp.rc.code;
+ complete(&adapter->fw_done);
break;
case REQUEST_UNMAP_RSP:
handle_request_unmap_rsp(crq, adapter);
diff --git a/drivers/net/ethernet/ibm/ibmvnic.h b/drivers/net/ethernet/ibm/ibmvnic.h
index 2d525c761b75..8eff6e15f4bb 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.h
+++ b/drivers/net/ethernet/ibm/ibmvnic.h
@@ -988,6 +988,7 @@ struct ibmvnic_adapter {
spinlock_t error_list_lock;
struct completion fw_done;
+ int fw_done_rc;
/* partner capabilities */
u64 min_tx_queues;
--
2.10.2