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Date: Mon, 08 Sep 2008 21:48:12 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: jeff@...zik.org
Cc: netdev@...r.kernel.org, davem@...emloft.net,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [NET-NEXT PATCH 15/24] ixgbe: fix ring reallocation in ethtool
From: Jesse Brandeburg <jesse.brandeburg@...el.com>
changing ring sizes in ethtool needs to be robust. If an allocation fails the
driver must continue operation, with the previous settings.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ixgbe/ixgbe.h | 4 ++
drivers/net/ixgbe/ixgbe_ethtool.c | 95 ++++++++++++++++++-------------------
drivers/net/ixgbe/ixgbe_main.c | 10 ++--
3 files changed, 56 insertions(+), 53 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index 71ddac6..27db64f 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -336,5 +336,9 @@ extern int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
struct ixgbe_ring *rxdr);
extern int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
struct ixgbe_ring *txdr);
+extern void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
+ struct ixgbe_ring *rxdr);
+extern void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
+ struct ixgbe_ring *txdr);
#endif /* _IXGBE_H_ */
diff --git a/drivers/net/ixgbe/ixgbe_ethtool.c b/drivers/net/ixgbe/ixgbe_ethtool.c
index f18e3da..928b97c 100644
--- a/drivers/net/ixgbe/ixgbe_ethtool.c
+++ b/drivers/net/ixgbe/ixgbe_ethtool.c
@@ -654,12 +654,9 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
struct ethtool_ringparam *ring)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
- struct ixgbe_tx_buffer *old_buf;
- struct ixgbe_rx_buffer *old_rx_buf;
- void *old_desc;
+ struct ixgbe_ring *temp_ring;
int i, err;
- u32 new_rx_count, new_tx_count, old_size;
- dma_addr_t old_dma;
+ u32 new_rx_count, new_tx_count;
if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
return -EINVAL;
@@ -678,6 +675,15 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
return 0;
}
+ if (adapter->num_tx_queues > adapter->num_rx_queues)
+ temp_ring = vmalloc(adapter->num_tx_queues *
+ sizeof(struct ixgbe_ring));
+ else
+ temp_ring = vmalloc(adapter->num_rx_queues *
+ sizeof(struct ixgbe_ring));
+ if (!temp_ring)
+ return -ENOMEM;
+
while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
msleep(1);
@@ -690,66 +696,59 @@ static int ixgbe_set_ringparam(struct net_device *netdev,
* to the tx and rx ring structs.
*/
if (new_tx_count != adapter->tx_ring->count) {
+ memcpy(temp_ring, adapter->tx_ring,
+ adapter->num_tx_queues * sizeof(struct ixgbe_ring));
+
for (i = 0; i < adapter->num_tx_queues; i++) {
- /* Save existing descriptor ring */
- old_buf = adapter->tx_ring[i].tx_buffer_info;
- old_desc = adapter->tx_ring[i].desc;
- old_size = adapter->tx_ring[i].size;
- old_dma = adapter->tx_ring[i].dma;
- /* Try to allocate a new one */
- adapter->tx_ring[i].tx_buffer_info = NULL;
- adapter->tx_ring[i].desc = NULL;
- adapter->tx_ring[i].count = new_tx_count;
- err = ixgbe_setup_tx_resources(adapter,
- &adapter->tx_ring[i]);
+ temp_ring[i].count = new_tx_count;
+ err = ixgbe_setup_tx_resources(adapter, &temp_ring[i]);
if (err) {
- /* Restore the old one so at least
- the adapter still works, even if
- we failed the request */
- adapter->tx_ring[i].tx_buffer_info = old_buf;
- adapter->tx_ring[i].desc = old_desc;
- adapter->tx_ring[i].size = old_size;
- adapter->tx_ring[i].dma = old_dma;
+ while (i) {
+ i--;
+ ixgbe_free_tx_resources(adapter, &temp_ring[i]);
+ }
goto err_setup;
}
- /* Free the old buffer manually */
- vfree(old_buf);
- pci_free_consistent(adapter->pdev, old_size,
- old_desc, old_dma);
}
+
+ for (i = 0; i < adapter->num_tx_queues; i++)
+ ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
+
+ memcpy(adapter->tx_ring, temp_ring,
+ adapter->num_tx_queues * sizeof(struct ixgbe_ring));
+
+ adapter->tx_ring_count = new_tx_count;
}
if (new_rx_count != adapter->rx_ring->count) {
- for (i = 0; i < adapter->num_rx_queues; i++) {
+ memcpy(temp_ring, adapter->rx_ring,
+ adapter->num_rx_queues * sizeof(struct ixgbe_ring));
- old_rx_buf = adapter->rx_ring[i].rx_buffer_info;
- old_desc = adapter->rx_ring[i].desc;
- old_size = adapter->rx_ring[i].size;
- old_dma = adapter->rx_ring[i].dma;
-
- adapter->rx_ring[i].rx_buffer_info = NULL;
- adapter->rx_ring[i].desc = NULL;
- adapter->rx_ring[i].dma = 0;
- adapter->rx_ring[i].count = new_rx_count;
- err = ixgbe_setup_rx_resources(adapter,
- &adapter->rx_ring[i]);
+ for (i = 0; i < adapter->num_rx_queues; i++) {
+ temp_ring[i].count = new_rx_count;
+ err = ixgbe_setup_rx_resources(adapter, &temp_ring[i]);
if (err) {
- adapter->rx_ring[i].rx_buffer_info = old_rx_buf;
- adapter->rx_ring[i].desc = old_desc;
- adapter->rx_ring[i].size = old_size;
- adapter->rx_ring[i].dma = old_dma;
+ while (i) {
+ i--;
+ ixgbe_free_rx_resources(adapter, &temp_ring[i]);
+ }
goto err_setup;
}
-
- vfree(old_rx_buf);
- pci_free_consistent(adapter->pdev, old_size, old_desc,
- old_dma);
}
+
+ for (i = 0; i < adapter->num_rx_queues; i++)
+ ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
+
+ memcpy(adapter->rx_ring, temp_ring,
+ adapter->num_rx_queues * sizeof(struct ixgbe_ring));
+
+ adapter->rx_ring_count = new_rx_count;
}
+ /* success! */
err = 0;
err_setup:
- if (netif_running(adapter->netdev))
+ if (netif_running(netdev))
ixgbe_up(adapter);
clear_bit(__IXGBE_RESETTING, &adapter->state);
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 8b0f1b6..27d69e4 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -2737,8 +2737,8 @@ alloc_failed:
*
* Free all transmit software resources
**/
-static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
- struct ixgbe_ring *tx_ring)
+void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
+ struct ixgbe_ring *tx_ring)
{
struct pci_dev *pdev = adapter->pdev;
@@ -2767,14 +2767,14 @@ static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
}
/**
- * ixgbe_free_rx_resources - Free Rx Resources
+ * ixgbe_ree_rx_resources - Free Rx Resources
* @adapter: board private structure
* @rx_ring: ring to clean the resources from
*
* Free all receive software resources
**/
-static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
- struct ixgbe_ring *rx_ring)
+void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
+ struct ixgbe_ring *rx_ring)
{
struct pci_dev *pdev = adapter->pdev;
--
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