From ac6a0c4aab16070d7d55f49a52de33f716ae1d3d Mon Sep 17 00:00:00 2001 From: Sathya Perla Date: Mon, 21 Mar 2011 20:49:25 +0000 Subject: [PATCH] be2net: refactor code that decides adapter->num_rx_queues The code has been refactored to not set num_rx_qs inside be_enable_msix(). num_rx_qs is now set at the time of queue creation based on the number of available msix vectors. Signed-off-by: Sathya Perla Signed-off-by: David S. Miller --- drivers/net/benet/be.h | 8 +++-- drivers/net/benet/be_main.c | 66 +++++++++++++++++++------------------ 2 files changed, 39 insertions(+), 35 deletions(-) diff --git a/drivers/net/benet/be.h b/drivers/net/benet/be.h index f803c58b941d..3937bca3d431 100644 --- a/drivers/net/benet/be.h +++ b/drivers/net/benet/be.h @@ -84,7 +84,8 @@ static inline char *nic_name(struct pci_dev *pdev) #define MCC_CQ_LEN 256 #define MAX_RSS_QS 4 /* BE limit is 4 queues/port */ -#define BE_MAX_MSIX_VECTORS (MAX_RSS_QS + 1 + 1)/* RSS qs + 1 def Rx + Tx */ +#define MAX_RX_QS (MAX_RSS_QS + 1) /* RSS qs + 1 def Rx */ +#define BE_MAX_MSIX_VECTORS (MAX_RX_QS + 1)/* RX + TX */ #define BE_NAPI_WEIGHT 64 #define MAX_RX_POST BE_NAPI_WEIGHT /* Frags posted at a time */ #define RX_FRAGS_REFILL_WM (RX_Q_LEN - MAX_RX_POST) @@ -276,7 +277,7 @@ struct be_adapter { spinlock_t mcc_cq_lock; struct msix_entry msix_entries[BE_MAX_MSIX_VECTORS]; - bool msix_enabled; + u32 num_msix_vec; bool isr_registered; /* TX Rings */ @@ -287,7 +288,7 @@ struct be_adapter { u32 cache_line_break[8]; /* Rx rings */ - struct be_rx_obj rx_obj[MAX_RSS_QS + 1]; /* one default non-rss Q */ + struct be_rx_obj rx_obj[MAX_RX_QS]; u32 num_rx_qs; u32 big_page_size; /* Compounded page size shared by rx wrbs */ @@ -351,6 +352,7 @@ struct be_adapter { extern const struct ethtool_ops be_ethtool_ops; +#define msix_enabled(adapter) (adapter->num_msix_vec > 0) #define tx_stats(adapter) (&adapter->tx_stats) #define rx_stats(rxo) (&rxo->stats) diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c index a71163f1e34b..7a5d6a308051 100644 --- a/drivers/net/benet/be_main.c +++ b/drivers/net/benet/be_main.c @@ -1567,12 +1567,31 @@ static void be_rx_queues_destroy(struct be_adapter *adapter) } } +static u32 be_num_rxqs_want(struct be_adapter *adapter) +{ + if (multi_rxq && (adapter->function_caps & BE_FUNCTION_CAPS_RSS) && + !adapter->sriov_enabled && !(adapter->function_mode & 0x400)) { + return 1 + MAX_RSS_QS; /* one default non-RSS queue */ + } else { + dev_warn(&adapter->pdev->dev, + "No support for multiple RX queues\n"); + return 1; + } +} + static int be_rx_queues_create(struct be_adapter *adapter) { struct be_queue_info *eq, *q, *cq; struct be_rx_obj *rxo; int rc, i; + adapter->num_rx_qs = min(be_num_rxqs_want(adapter), + msix_enabled(adapter) ? + adapter->num_msix_vec - 1 : 1); + if (adapter->num_rx_qs != MAX_RX_QS) + dev_warn(&adapter->pdev->dev, + "Can create only %d RX queues", adapter->num_rx_qs); + adapter->big_page_size = (1 << get_order(rx_frag_size)) * PAGE_SIZE; for_all_rx_queues(adapter, rxo, i) { rxo->adapter = adapter; @@ -1878,51 +1897,35 @@ reschedule: static void be_msix_disable(struct be_adapter *adapter) { - if (adapter->msix_enabled) { + if (msix_enabled(adapter)) { pci_disable_msix(adapter->pdev); - adapter->msix_enabled = false; - } -} - -static int be_num_rxqs_get(struct be_adapter *adapter) -{ - if (multi_rxq && (adapter->function_caps & BE_FUNCTION_CAPS_RSS) && - !adapter->sriov_enabled && !(adapter->function_mode & 0x400)) { - return 1 + MAX_RSS_QS; /* one default non-RSS queue */ - } else { - dev_warn(&adapter->pdev->dev, - "No support for multiple RX queues\n"); - return 1; + adapter->num_msix_vec = 0; } } static void be_msix_enable(struct be_adapter *adapter) { #define BE_MIN_MSIX_VECTORS (1 + 1) /* Rx + Tx */ - int i, status; + int i, status, num_vec; - adapter->num_rx_qs = be_num_rxqs_get(adapter); + num_vec = be_num_rxqs_want(adapter) + 1; - for (i = 0; i < (adapter->num_rx_qs + 1); i++) + for (i = 0; i < num_vec; i++) adapter->msix_entries[i].entry = i; - status = pci_enable_msix(adapter->pdev, adapter->msix_entries, - adapter->num_rx_qs + 1); + status = pci_enable_msix(adapter->pdev, adapter->msix_entries, num_vec); if (status == 0) { goto done; } else if (status >= BE_MIN_MSIX_VECTORS) { + num_vec = status; if (pci_enable_msix(adapter->pdev, adapter->msix_entries, - status) == 0) { - adapter->num_rx_qs = status - 1; - dev_warn(&adapter->pdev->dev, - "Could alloc only %d MSIx vectors. " - "Using %d RX Qs\n", status, adapter->num_rx_qs); + num_vec) == 0) goto done; - } } return; done: - adapter->msix_enabled = true; + adapter->num_msix_vec = num_vec; + return; } static void be_sriov_enable(struct be_adapter *adapter) @@ -2003,8 +2006,7 @@ err_msix: err: dev_warn(&adapter->pdev->dev, "MSIX Request IRQ failed - err %d\n", status); - pci_disable_msix(adapter->pdev); - adapter->msix_enabled = false; + be_msix_disable(adapter); return status; } @@ -2013,7 +2015,7 @@ static int be_irq_register(struct be_adapter *adapter) struct net_device *netdev = adapter->netdev; int status; - if (adapter->msix_enabled) { + if (msix_enabled(adapter)) { status = be_msix_register(adapter); if (status == 0) goto done; @@ -2046,7 +2048,7 @@ static void be_irq_unregister(struct be_adapter *adapter) return; /* INTx */ - if (!adapter->msix_enabled) { + if (!msix_enabled(adapter)) { free_irq(netdev->irq, adapter); goto done; } @@ -2088,7 +2090,7 @@ static int be_close(struct net_device *netdev) be_cq_notify(adapter, rxo->cq.id, false, 0); } - if (adapter->msix_enabled) { + if (msix_enabled(adapter)) { vec = be_msix_vec_get(adapter, tx_eq); synchronize_irq(vec); @@ -2261,7 +2263,7 @@ static int be_setup(struct be_adapter *adapter) BE_IF_FLAGS_PASS_L3L4_ERRORS; en_flags |= BE_IF_FLAGS_PASS_L3L4_ERRORS; - if (be_multi_rxq(adapter)) { + if (adapter->function_caps & BE_FUNCTION_CAPS_RSS) { cap_flags |= BE_IF_FLAGS_RSS; en_flags |= BE_IF_FLAGS_RSS; } -- 2.34.1