From c431f97ef96026e6da7032a871a0789cf5a2eaea Mon Sep 17 00:00:00 2001 From: Jesse Brandeburg Date: Thu, 11 Sep 2008 19:59:16 -0700 Subject: [PATCH] ixgbe: fix ring reallocation in ethtool 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 Signed-off-by: Jeff Kirsher Signed-off-by: Jeff Garzik --- 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 3b0481a..cde5d5a 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -2731,8 +2731,8 @@ 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; @@ -2761,14 +2761,14 @@ 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; -- 1.8.2.3