From 1bfaf07bb1d7201d3c6cb984bccd9c2416e19b6c Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Thu, 19 Feb 2009 20:39:23 -0800 Subject: [PATCH] igb: add vfs_allocated_count as placeholder for number of vfs This is the first step in supporting sr-iov. The vf_allocated_count value will be 0 until we actually have vfs present. In the meantime it represents an offset value for the start of the queues. Signed-off-by: Alexander Duyck Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/igb/igb.h | 9 ++++++--- drivers/net/igb/igb_main.c | 17 +++++++++++------ 2 files changed, 17 insertions(+), 9 deletions(-) diff --git a/drivers/net/igb/igb.h b/drivers/net/igb/igb.h index 49fc0da..3d3e5f6 100644 --- a/drivers/net/igb/igb.h +++ b/drivers/net/igb/igb.h @@ -57,8 +57,10 @@ struct igb_adapter; #define IGB_MIN_ITR_USECS 10 /* Transmit and receive queues */ -#define IGB_MAX_RX_QUEUES 4 -#define IGB_MAX_TX_QUEUES 4 +#define IGB_MAX_RX_QUEUES (adapter->vfs_allocated_count ? \ + (adapter->vfs_allocated_count > 6 ? 1 : 2) : 4) +#define IGB_MAX_TX_QUEUES IGB_MAX_RX_QUEUES +#define IGB_ABS_MAX_TX_QUEUES 4 /* RX descriptor control thresholds. * PTHRESH - MAC will consider prefetch if it has fewer than this number of @@ -267,9 +269,10 @@ struct igb_adapter { unsigned int flags; u32 eeprom_wol; - struct igb_ring *multi_tx_table[IGB_MAX_TX_QUEUES]; + struct igb_ring *multi_tx_table[IGB_ABS_MAX_TX_QUEUES]; unsigned int tx_ring_count; unsigned int rx_ring_count; + unsigned int vfs_allocated_count; }; #define IGB_FLAG_HAS_MSI (1 << 0) diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 5a6fff6..0dcc0c1 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -312,6 +312,7 @@ module_exit(igb_exit_module); static void igb_cache_ring_register(struct igb_adapter *adapter) { int i; + unsigned int rbase_offset = adapter->vfs_allocated_count; switch (adapter->hw.mac.type) { case e1000_82576: @@ -321,9 +322,11 @@ static void igb_cache_ring_register(struct igb_adapter *adapter) * and continue consuming queues in the same sequence */ for (i = 0; i < adapter->num_rx_queues; i++) - adapter->rx_ring[i].reg_idx = Q_IDX_82576(i); + adapter->rx_ring[i].reg_idx = rbase_offset + + Q_IDX_82576(i); for (i = 0; i < adapter->num_tx_queues; i++) - adapter->tx_ring[i].reg_idx = Q_IDX_82576(i); + adapter->tx_ring[i].reg_idx = rbase_offset + + Q_IDX_82576(i); break; case e1000_82575: default: @@ -423,7 +426,7 @@ static void igb_assign_vector(struct igb_adapter *adapter, int rx_queue, a vector number along with a "valid" bit. Sadly, the layout of the table is somewhat counterintuitive. */ if (rx_queue > IGB_N0_QUEUE) { - index = (rx_queue >> 1); + index = (rx_queue >> 1) + adapter->vfs_allocated_count; ivar = array_rd32(E1000_IVAR0, index); if (rx_queue & 0x1) { /* vector goes into third byte of register */ @@ -438,7 +441,7 @@ static void igb_assign_vector(struct igb_adapter *adapter, int rx_queue, array_wr32(E1000_IVAR0, index, ivar); } if (tx_queue > IGB_N0_QUEUE) { - index = (tx_queue >> 1); + index = (tx_queue >> 1) + adapter->vfs_allocated_count; ivar = array_rd32(E1000_IVAR0, index); if (tx_queue & 0x1) { /* vector goes into high byte of register */ @@ -1157,7 +1160,8 @@ static int __devinit igb_probe(struct pci_dev *pdev, pci_save_state(pdev); err = -ENOMEM; - netdev = alloc_etherdev_mq(sizeof(struct igb_adapter), IGB_MAX_TX_QUEUES); + netdev = alloc_etherdev_mq(sizeof(struct igb_adapter), + IGB_ABS_MAX_TX_QUEUES); if (!netdev) goto err_alloc_etherdev; @@ -2029,6 +2033,7 @@ static void igb_configure_rx(struct igb_adapter *adapter) writel(reta.dword, hw->hw_addr + E1000_RETA(0) + (j & ~3)); } + mrqc = E1000_MRQC_ENABLE_RSS_4Q; /* Fill out hash function seeds */ @@ -3150,7 +3155,7 @@ static int igb_xmit_frame_adv(struct sk_buff *skb, struct net_device *netdev) struct igb_ring *tx_ring; int r_idx = 0; - r_idx = skb->queue_mapping & (IGB_MAX_TX_QUEUES - 1); + r_idx = skb->queue_mapping & (IGB_ABS_MAX_TX_QUEUES - 1); tx_ring = adapter->multi_tx_table[r_idx]; /* This goes back to the question of how to logically map a tx queue -- 2.7.4