igc: Add support for Tx/Rx rings
This change adds the defines and structures necessary to support both Tx and Rx descriptor rings. Signed-off-by: Sasha Neftin <sasha.neftin@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sasha Neftin
Jeff Kirsher
Родитель
3df25e4c1e
Коммит
13b5b7fd6a
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@ -7,4 +7,4 @@
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obj-$(CONFIG_IGC) += igc.o
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igc-objs := igc_main.o igc_mac.o
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igc-objs := igc_main.o igc_mac.o igc_base.o
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@ -46,6 +46,45 @@ extern char igc_driver_version[];
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#define MAX_Q_VECTORS 8
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#define MAX_STD_JUMBO_FRAME_SIZE 9216
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/* Supported Rx Buffer Sizes */
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#define IGC_RXBUFFER_256 256
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#define IGC_RXBUFFER_2048 2048
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#define IGC_RXBUFFER_3072 3072
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#define IGC_RX_HDR_LEN IGC_RXBUFFER_256
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/* RX and TX descriptor control thresholds.
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* PTHRESH - MAC will consider prefetch if it has fewer than this number of
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* descriptors available in its onboard memory.
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* Setting this to 0 disables RX descriptor prefetch.
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* HTHRESH - MAC will only prefetch if there are at least this many descriptors
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* available in host memory.
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* If PTHRESH is 0, this should also be 0.
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* WTHRESH - RX descriptor writeback threshold - MAC will delay writing back
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* descriptors until either it has this many to write back, or the
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* ITR timer expires.
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*/
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#define IGC_RX_PTHRESH 8
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#define IGC_RX_HTHRESH 8
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#define IGC_TX_PTHRESH 8
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#define IGC_TX_HTHRESH 1
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#define IGC_RX_WTHRESH 4
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#define IGC_TX_WTHRESH 16
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#define IGC_RX_DMA_ATTR \
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(DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
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#define IGC_TS_HDR_LEN 16
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#define IGC_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN)
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#if (PAGE_SIZE < 8192)
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#define IGC_MAX_FRAME_BUILD_SKB \
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(SKB_WITH_OVERHEAD(IGC_RXBUFFER_2048) - IGC_SKB_PAD - IGC_TS_HDR_LEN)
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#else
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#define IGC_MAX_FRAME_BUILD_SKB (IGC_RXBUFFER_2048 - IGC_TS_HDR_LEN)
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#endif
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enum igc_state_t {
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__IGC_TESTING,
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__IGC_RESETTING,
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@ -53,6 +92,33 @@ enum igc_state_t {
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__IGC_PTP_TX_IN_PROGRESS,
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};
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/* wrapper around a pointer to a socket buffer,
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* so a DMA handle can be stored along with the buffer
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*/
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struct igc_tx_buffer {
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union igc_adv_tx_desc *next_to_watch;
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unsigned long time_stamp;
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struct sk_buff *skb;
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unsigned int bytecount;
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u16 gso_segs;
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__be16 protocol;
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DEFINE_DMA_UNMAP_ADDR(dma);
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DEFINE_DMA_UNMAP_LEN(len);
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u32 tx_flags;
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};
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struct igc_rx_buffer {
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dma_addr_t dma;
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struct page *page;
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#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
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__u32 page_offset;
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#else
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__u16 page_offset;
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#endif
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__u16 pagecnt_bias;
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};
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struct igc_tx_queue_stats {
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u64 packets;
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u64 bytes;
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@ -214,4 +280,63 @@ struct igc_adapter {
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struct igc_mac_addr *mac_table;
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};
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/* igc_desc_unused - calculate if we have unused descriptors */
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static inline u16 igc_desc_unused(const struct igc_ring *ring)
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{
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u16 ntc = ring->next_to_clean;
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u16 ntu = ring->next_to_use;
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return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
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}
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static inline struct netdev_queue *txring_txq(const struct igc_ring *tx_ring)
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{
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return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);
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}
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enum igc_ring_flags_t {
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IGC_RING_FLAG_RX_3K_BUFFER,
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IGC_RING_FLAG_RX_BUILD_SKB_ENABLED,
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IGC_RING_FLAG_RX_SCTP_CSUM,
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IGC_RING_FLAG_RX_LB_VLAN_BSWAP,
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IGC_RING_FLAG_TX_CTX_IDX,
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IGC_RING_FLAG_TX_DETECT_HANG
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};
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#define ring_uses_large_buffer(ring) \
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test_bit(IGC_RING_FLAG_RX_3K_BUFFER, &(ring)->flags)
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#define ring_uses_build_skb(ring) \
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test_bit(IGC_RING_FLAG_RX_BUILD_SKB_ENABLED, &(ring)->flags)
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static inline unsigned int igc_rx_bufsz(struct igc_ring *ring)
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{
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#if (PAGE_SIZE < 8192)
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if (ring_uses_large_buffer(ring))
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return IGC_RXBUFFER_3072;
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if (ring_uses_build_skb(ring))
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return IGC_MAX_FRAME_BUILD_SKB + IGC_TS_HDR_LEN;
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#endif
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return IGC_RXBUFFER_2048;
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}
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static inline unsigned int igc_rx_pg_order(struct igc_ring *ring)
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{
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#if (PAGE_SIZE < 8192)
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if (ring_uses_large_buffer(ring))
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return 1;
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#endif
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return 0;
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}
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#define igc_rx_pg_size(_ring) (PAGE_SIZE << igc_rx_pg_order(_ring))
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#define IGC_RX_DESC(R, i) \
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(&(((union igc_adv_rx_desc *)((R)->desc))[i]))
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#define IGC_TX_DESC(R, i) \
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(&(((union igc_adv_tx_desc *)((R)->desc))[i]))
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#define IGC_TX_CTXTDESC(R, i) \
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(&(((struct igc_adv_tx_context_desc *)((R)->desc))[i]))
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#endif /* _IGC_H_ */
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@ -0,0 +1,83 @@
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// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2018 Intel Corporation */
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#include <linux/delay.h>
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#include "igc_hw.h"
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#include "igc_i225.h"
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/**
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* igc_rx_fifo_flush_base - Clean rx fifo after Rx enable
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* @hw: pointer to the HW structure
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*
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* After Rx enable, if manageability is enabled then there is likely some
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* bad data at the start of the fifo and possibly in the DMA fifo. This
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* function clears the fifos and flushes any packets that came in as rx was
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* being enabled.
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*/
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void igc_rx_fifo_flush_base(struct igc_hw *hw)
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{
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u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled;
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int i, ms_wait;
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/* disable IPv6 options as per hardware errata */
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rfctl = rd32(IGC_RFCTL);
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rfctl |= IGC_RFCTL_IPV6_EX_DIS;
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wr32(IGC_RFCTL, rfctl);
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if (!(rd32(IGC_MANC) & IGC_MANC_RCV_TCO_EN))
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return;
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/* Disable all Rx queues */
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for (i = 0; i < 4; i++) {
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rxdctl[i] = rd32(IGC_RXDCTL(i));
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wr32(IGC_RXDCTL(i),
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rxdctl[i] & ~IGC_RXDCTL_QUEUE_ENABLE);
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}
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/* Poll all queues to verify they have shut down */
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for (ms_wait = 0; ms_wait < 10; ms_wait++) {
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usleep_range(1000, 2000);
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rx_enabled = 0;
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for (i = 0; i < 4; i++)
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rx_enabled |= rd32(IGC_RXDCTL(i));
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if (!(rx_enabled & IGC_RXDCTL_QUEUE_ENABLE))
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break;
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}
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if (ms_wait == 10)
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pr_debug("Queue disable timed out after 10ms\n");
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/* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all
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* incoming packets are rejected. Set enable and wait 2ms so that
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* any packet that was coming in as RCTL.EN was set is flushed
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*/
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wr32(IGC_RFCTL, rfctl & ~IGC_RFCTL_LEF);
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rlpml = rd32(IGC_RLPML);
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wr32(IGC_RLPML, 0);
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rctl = rd32(IGC_RCTL);
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temp_rctl = rctl & ~(IGC_RCTL_EN | IGC_RCTL_SBP);
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temp_rctl |= IGC_RCTL_LPE;
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wr32(IGC_RCTL, temp_rctl);
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wr32(IGC_RCTL, temp_rctl | IGC_RCTL_EN);
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wrfl();
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usleep_range(2000, 3000);
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/* Enable Rx queues that were previously enabled and restore our
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* previous state
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*/
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for (i = 0; i < 4; i++)
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wr32(IGC_RXDCTL(i), rxdctl[i]);
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wr32(IGC_RCTL, rctl);
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wrfl();
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wr32(IGC_RLPML, rlpml);
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wr32(IGC_RFCTL, rfctl);
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/* Flush receive errors generated by workaround */
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rd32(IGC_ROC);
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rd32(IGC_RNBC);
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rd32(IGC_MPC);
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}
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@ -0,0 +1,89 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2018 Intel Corporation */
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#ifndef _IGC_BASE_H
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#define _IGC_BASE_H
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/* forward declaration */
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void igc_rx_fifo_flush_base(struct igc_hw *hw);
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/* Transmit Descriptor - Advanced */
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union igc_adv_tx_desc {
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struct {
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__le64 buffer_addr; /* Address of descriptor's data buf */
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__le32 cmd_type_len;
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__le32 olinfo_status;
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} read;
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struct {
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__le64 rsvd; /* Reserved */
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__le32 nxtseq_seed;
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__le32 status;
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} wb;
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};
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struct igc_adv_data_desc {
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__le64 buffer_addr; /* Address of the descriptor's data buffer */
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union {
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u32 data;
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struct {
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u32 datalen:16; /* Data buffer length */
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u32 rsvd:4;
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u32 dtyp:4; /* Descriptor type */
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u32 dcmd:8; /* Descriptor command */
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} config;
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} lower;
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union {
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u32 data;
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struct {
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u32 status:4; /* Descriptor status */
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u32 idx:4;
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u32 popts:6; /* Packet Options */
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u32 paylen:18; /* Payload length */
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} options;
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} upper;
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};
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/* Receive Descriptor - Advanced */
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union igc_adv_rx_desc {
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struct {
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__le64 pkt_addr; /* Packet buffer address */
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__le64 hdr_addr; /* Header buffer address */
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} read;
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struct {
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struct {
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union {
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__le32 data;
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struct {
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__le16 pkt_info; /*RSS type, Pkt type*/
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/* Split Header, header buffer len */
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__le16 hdr_info;
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} hs_rss;
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} lo_dword;
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union {
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__le32 rss; /* RSS Hash */
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struct {
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__le16 ip_id; /* IP id */
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__le16 csum; /* Packet Checksum */
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} csum_ip;
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} hi_dword;
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} lower;
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struct {
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__le32 status_error; /* ext status/error */
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__le16 length; /* Packet length */
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__le16 vlan; /* VLAN tag */
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} upper;
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} wb; /* writeback */
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};
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/* Additional Transmit Descriptor Control definitions */
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#define IGC_TXDCTL_QUEUE_ENABLE 0x02000000 /* Ena specific Tx Queue */
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/* Additional Receive Descriptor Control definitions */
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#define IGC_RXDCTL_QUEUE_ENABLE 0x02000000 /* Ena specific Rx Queue */
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/* SRRCTL bit definitions */
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#define IGC_SRRCTL_BSIZEPKT_SHIFT 10 /* Shift _right_ */
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#define IGC_SRRCTL_BSIZEHDRSIZE_SHIFT 2 /* Shift _left_ */
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#define IGC_SRRCTL_DESCTYPE_ADV_ONEBUF 0x02000000
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#endif /* _IGC_BASE_H */
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@ -51,6 +51,10 @@
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#define IGC_ICR_RXO BIT(6) /* Rx overrun */
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#define IGC_ICR_RXT0 BIT(7) /* Rx timer intr (ring 0) */
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#define IGC_ICR_DRSTA BIT(30) /* Device Reset Asserted */
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/* If this bit asserted, the driver should claim the interrupt */
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#define IGC_ICR_INT_ASSERTED BIT(31)
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#define IGC_ICS_RXT0 IGC_ICR_RXT0 /* Rx timer intr */
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#define IMS_ENABLE_MASK ( \
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@ -80,6 +84,45 @@
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#define IGC_GPIE_EIAME 0x40000000
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#define IGC_GPIE_PBA 0x80000000
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/* Transmit Control */
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#define IGC_TCTL_EN 0x00000002 /* enable Tx */
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#define IGC_TCTL_PSP 0x00000008 /* pad short packets */
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#define IGC_TCTL_CT 0x00000ff0 /* collision threshold */
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#define IGC_TCTL_COLD 0x003ff000 /* collision distance */
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#define IGC_TCTL_RTLC 0x01000000 /* Re-transmit on late collision */
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#define IGC_TCTL_MULR 0x10000000 /* Multiple request support */
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#define IGC_CT_SHIFT 4
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#define IGC_COLLISION_THRESHOLD 15
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/* Management Control */
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#define IGC_MANC_RCV_TCO_EN 0x00020000 /* Receive TCO Packets Enabled */
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/* Receive Control */
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#define IGC_RCTL_RST 0x00000001 /* Software reset */
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#define IGC_RCTL_EN 0x00000002 /* enable */
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#define IGC_RCTL_SBP 0x00000004 /* store bad packet */
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#define IGC_RCTL_UPE 0x00000008 /* unicast promisc enable */
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#define IGC_RCTL_MPE 0x00000010 /* multicast promisc enable */
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#define IGC_RCTL_LPE 0x00000020 /* long packet enable */
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#define IGC_RCTL_LBM_MAC 0x00000040 /* MAC loopback mode */
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#define IGC_RCTL_LBM_TCVR 0x000000C0 /* tcvr loopback mode */
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#define IGC_RCTL_RDMTS_HALF 0x00000000 /* Rx desc min thresh size */
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#define IGC_RCTL_BAM 0x00008000 /* broadcast enable */
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/* Header split receive */
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#define IGC_RFCTL_IPV6_EX_DIS 0x00010000
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#define IGC_RFCTL_LEF 0x00040000
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#define IGC_RCTL_SZ_256 0x00030000 /* Rx buffer size 256 */
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#define IGC_RCTL_MO_SHIFT 12 /* multicast offset shift */
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#define IGC_RCTL_CFIEN 0x00080000 /* canonical form enable */
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#define IGC_RCTL_DPF 0x00400000 /* discard pause frames */
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#define IGC_RCTL_PMCF 0x00800000 /* pass MAC control frames */
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#define IGC_RCTL_SECRC 0x04000000 /* Strip Ethernet CRC */
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#define IGC_N0_QUEUE -1
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#endif /* _IGC_DEFINES_H_ */
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@ -10,6 +10,7 @@
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#include "igc_defines.h"
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#include "igc_mac.h"
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#include "igc_i225.h"
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#include "igc_base.h"
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#define IGC_DEV_ID_I225_LM 0x15F2
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#define IGC_DEV_ID_I225_V 0x15F3
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@ -37,10 +37,12 @@ static const struct pci_device_id igc_pci_tbl[] = {
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MODULE_DEVICE_TABLE(pci, igc_pci_tbl);
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/* forward declaration */
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static void igc_clean_tx_ring(struct igc_ring *tx_ring);
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static int igc_sw_init(struct igc_adapter *);
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static void igc_configure(struct igc_adapter *adapter);
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static void igc_power_down_link(struct igc_adapter *adapter);
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static void igc_set_default_mac_filter(struct igc_adapter *adapter);
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static void igc_set_rx_mode(struct net_device *netdev);
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static void igc_write_itr(struct igc_q_vector *q_vector);
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static void igc_assign_vector(struct igc_q_vector *q_vector, int msix_vector);
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static void igc_free_q_vector(struct igc_adapter *adapter, int v_idx);
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@ -118,6 +120,527 @@ static void igc_get_hw_control(struct igc_adapter *adapter)
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ctrl_ext | IGC_CTRL_EXT_DRV_LOAD);
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}
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/**
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* igc_free_tx_resources - Free Tx Resources per Queue
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* @tx_ring: Tx descriptor ring for a specific queue
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*
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* Free all transmit software resources
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*/
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static void igc_free_tx_resources(struct igc_ring *tx_ring)
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{
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igc_clean_tx_ring(tx_ring);
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vfree(tx_ring->tx_buffer_info);
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tx_ring->tx_buffer_info = NULL;
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/* if not set, then don't free */
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if (!tx_ring->desc)
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return;
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dma_free_coherent(tx_ring->dev, tx_ring->size,
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tx_ring->desc, tx_ring->dma);
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tx_ring->desc = NULL;
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}
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/**
|
||||
* igc_free_all_tx_resources - Free Tx Resources for All Queues
|
||||
* @adapter: board private structure
|
||||
*
|
||||
* Free all transmit software resources
|
||||
*/
|
||||
static void igc_free_all_tx_resources(struct igc_adapter *adapter)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < adapter->num_tx_queues; i++)
|
||||
igc_free_tx_resources(adapter->tx_ring[i]);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_clean_tx_ring - Free Tx Buffers
|
||||
* @tx_ring: ring to be cleaned
|
||||
*/
|
||||
static void igc_clean_tx_ring(struct igc_ring *tx_ring)
|
||||
{
|
||||
u16 i = tx_ring->next_to_clean;
|
||||
struct igc_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
|
||||
|
||||
while (i != tx_ring->next_to_use) {
|
||||
union igc_adv_tx_desc *eop_desc, *tx_desc;
|
||||
|
||||
/* Free all the Tx ring sk_buffs */
|
||||
dev_kfree_skb_any(tx_buffer->skb);
|
||||
|
||||
/* unmap skb header data */
|
||||
dma_unmap_single(tx_ring->dev,
|
||||
dma_unmap_addr(tx_buffer, dma),
|
||||
dma_unmap_len(tx_buffer, len),
|
||||
DMA_TO_DEVICE);
|
||||
|
||||
/* check for eop_desc to determine the end of the packet */
|
||||
eop_desc = tx_buffer->next_to_watch;
|
||||
tx_desc = IGC_TX_DESC(tx_ring, i);
|
||||
|
||||
/* unmap remaining buffers */
|
||||
while (tx_desc != eop_desc) {
|
||||
tx_buffer++;
|
||||
tx_desc++;
|
||||
i++;
|
||||
if (unlikely(i == tx_ring->count)) {
|
||||
i = 0;
|
||||
tx_buffer = tx_ring->tx_buffer_info;
|
||||
tx_desc = IGC_TX_DESC(tx_ring, 0);
|
||||
}
|
||||
|
||||
/* unmap any remaining paged data */
|
||||
if (dma_unmap_len(tx_buffer, len))
|
||||
dma_unmap_page(tx_ring->dev,
|
||||
dma_unmap_addr(tx_buffer, dma),
|
||||
dma_unmap_len(tx_buffer, len),
|
||||
DMA_TO_DEVICE);
|
||||
}
|
||||
|
||||
/* move us one more past the eop_desc for start of next pkt */
|
||||
tx_buffer++;
|
||||
i++;
|
||||
if (unlikely(i == tx_ring->count)) {
|
||||
i = 0;
|
||||
tx_buffer = tx_ring->tx_buffer_info;
|
||||
}
|
||||
}
|
||||
|
||||
/* reset BQL for queue */
|
||||
netdev_tx_reset_queue(txring_txq(tx_ring));
|
||||
|
||||
/* reset next_to_use and next_to_clean */
|
||||
tx_ring->next_to_use = 0;
|
||||
tx_ring->next_to_clean = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_setup_tx_resources - allocate Tx resources (Descriptors)
|
||||
* @tx_ring: tx descriptor ring (for a specific queue) to setup
|
||||
*
|
||||
* Return 0 on success, negative on failure
|
||||
*/
|
||||
static int igc_setup_tx_resources(struct igc_ring *tx_ring)
|
||||
{
|
||||
struct device *dev = tx_ring->dev;
|
||||
int size = 0;
|
||||
|
||||
size = sizeof(struct igc_tx_buffer) * tx_ring->count;
|
||||
tx_ring->tx_buffer_info = vzalloc(size);
|
||||
if (!tx_ring->tx_buffer_info)
|
||||
goto err;
|
||||
|
||||
/* round up to nearest 4K */
|
||||
tx_ring->size = tx_ring->count * sizeof(union igc_adv_tx_desc);
|
||||
tx_ring->size = ALIGN(tx_ring->size, 4096);
|
||||
|
||||
tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
|
||||
&tx_ring->dma, GFP_KERNEL);
|
||||
|
||||
if (!tx_ring->desc)
|
||||
goto err;
|
||||
|
||||
tx_ring->next_to_use = 0;
|
||||
tx_ring->next_to_clean = 0;
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
vfree(tx_ring->tx_buffer_info);
|
||||
dev_err(dev,
|
||||
"Unable to allocate memory for the transmit descriptor ring\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_setup_all_tx_resources - wrapper to allocate Tx resources for all queues
|
||||
* @adapter: board private structure
|
||||
*
|
||||
* Return 0 on success, negative on failure
|
||||
*/
|
||||
static int igc_setup_all_tx_resources(struct igc_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
int i, err = 0;
|
||||
|
||||
for (i = 0; i < adapter->num_tx_queues; i++) {
|
||||
err = igc_setup_tx_resources(adapter->tx_ring[i]);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev,
|
||||
"Allocation for Tx Queue %u failed\n", i);
|
||||
for (i--; i >= 0; i--)
|
||||
igc_free_tx_resources(adapter->tx_ring[i]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_clean_rx_ring - Free Rx Buffers per Queue
|
||||
* @rx_ring: ring to free buffers from
|
||||
*/
|
||||
static void igc_clean_rx_ring(struct igc_ring *rx_ring)
|
||||
{
|
||||
u16 i = rx_ring->next_to_clean;
|
||||
|
||||
if (rx_ring->skb)
|
||||
dev_kfree_skb(rx_ring->skb);
|
||||
rx_ring->skb = NULL;
|
||||
|
||||
/* Free all the Rx ring sk_buffs */
|
||||
while (i != rx_ring->next_to_alloc) {
|
||||
struct igc_rx_buffer *buffer_info = &rx_ring->rx_buffer_info[i];
|
||||
|
||||
/* Invalidate cache lines that may have been written to by
|
||||
* device so that we avoid corrupting memory.
|
||||
*/
|
||||
dma_sync_single_range_for_cpu(rx_ring->dev,
|
||||
buffer_info->dma,
|
||||
buffer_info->page_offset,
|
||||
igc_rx_bufsz(rx_ring),
|
||||
DMA_FROM_DEVICE);
|
||||
|
||||
/* free resources associated with mapping */
|
||||
dma_unmap_page_attrs(rx_ring->dev,
|
||||
buffer_info->dma,
|
||||
igc_rx_pg_size(rx_ring),
|
||||
DMA_FROM_DEVICE,
|
||||
IGC_RX_DMA_ATTR);
|
||||
__page_frag_cache_drain(buffer_info->page,
|
||||
buffer_info->pagecnt_bias);
|
||||
|
||||
i++;
|
||||
if (i == rx_ring->count)
|
||||
i = 0;
|
||||
}
|
||||
|
||||
rx_ring->next_to_alloc = 0;
|
||||
rx_ring->next_to_clean = 0;
|
||||
rx_ring->next_to_use = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_free_rx_resources - Free Rx Resources
|
||||
* @rx_ring: ring to clean the resources from
|
||||
*
|
||||
* Free all receive software resources
|
||||
*/
|
||||
static void igc_free_rx_resources(struct igc_ring *rx_ring)
|
||||
{
|
||||
igc_clean_rx_ring(rx_ring);
|
||||
|
||||
vfree(rx_ring->rx_buffer_info);
|
||||
rx_ring->rx_buffer_info = NULL;
|
||||
|
||||
/* if not set, then don't free */
|
||||
if (!rx_ring->desc)
|
||||
return;
|
||||
|
||||
dma_free_coherent(rx_ring->dev, rx_ring->size,
|
||||
rx_ring->desc, rx_ring->dma);
|
||||
|
||||
rx_ring->desc = NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_free_all_rx_resources - Free Rx Resources for All Queues
|
||||
* @adapter: board private structure
|
||||
*
|
||||
* Free all receive software resources
|
||||
*/
|
||||
static void igc_free_all_rx_resources(struct igc_adapter *adapter)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < adapter->num_rx_queues; i++)
|
||||
igc_free_rx_resources(adapter->rx_ring[i]);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_setup_rx_resources - allocate Rx resources (Descriptors)
|
||||
* @rx_ring: rx descriptor ring (for a specific queue) to setup
|
||||
*
|
||||
* Returns 0 on success, negative on failure
|
||||
*/
|
||||
static int igc_setup_rx_resources(struct igc_ring *rx_ring)
|
||||
{
|
||||
struct device *dev = rx_ring->dev;
|
||||
int size, desc_len;
|
||||
|
||||
size = sizeof(struct igc_rx_buffer) * rx_ring->count;
|
||||
rx_ring->rx_buffer_info = vzalloc(size);
|
||||
if (!rx_ring->rx_buffer_info)
|
||||
goto err;
|
||||
|
||||
desc_len = sizeof(union igc_adv_rx_desc);
|
||||
|
||||
/* Round up to nearest 4K */
|
||||
rx_ring->size = rx_ring->count * desc_len;
|
||||
rx_ring->size = ALIGN(rx_ring->size, 4096);
|
||||
|
||||
rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
|
||||
&rx_ring->dma, GFP_KERNEL);
|
||||
|
||||
if (!rx_ring->desc)
|
||||
goto err;
|
||||
|
||||
rx_ring->next_to_alloc = 0;
|
||||
rx_ring->next_to_clean = 0;
|
||||
rx_ring->next_to_use = 0;
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
vfree(rx_ring->rx_buffer_info);
|
||||
rx_ring->rx_buffer_info = NULL;
|
||||
dev_err(dev,
|
||||
"Unable to allocate memory for the receive descriptor ring\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_setup_all_rx_resources - wrapper to allocate Rx resources
|
||||
* (Descriptors) for all queues
|
||||
* @adapter: board private structure
|
||||
*
|
||||
* Return 0 on success, negative on failure
|
||||
*/
|
||||
static int igc_setup_all_rx_resources(struct igc_adapter *adapter)
|
||||
{
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
int i, err = 0;
|
||||
|
||||
for (i = 0; i < adapter->num_rx_queues; i++) {
|
||||
err = igc_setup_rx_resources(adapter->rx_ring[i]);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev,
|
||||
"Allocation for Rx Queue %u failed\n", i);
|
||||
for (i--; i >= 0; i--)
|
||||
igc_free_rx_resources(adapter->rx_ring[i]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_configure_rx_ring - Configure a receive ring after Reset
|
||||
* @adapter: board private structure
|
||||
* @ring: receive ring to be configured
|
||||
*
|
||||
* Configure the Rx unit of the MAC after a reset.
|
||||
*/
|
||||
static void igc_configure_rx_ring(struct igc_adapter *adapter,
|
||||
struct igc_ring *ring)
|
||||
{
|
||||
struct igc_hw *hw = &adapter->hw;
|
||||
union igc_adv_rx_desc *rx_desc;
|
||||
int reg_idx = ring->reg_idx;
|
||||
u32 srrctl = 0, rxdctl = 0;
|
||||
u64 rdba = ring->dma;
|
||||
|
||||
/* disable the queue */
|
||||
wr32(IGC_RXDCTL(reg_idx), 0);
|
||||
|
||||
/* Set DMA base address registers */
|
||||
wr32(IGC_RDBAL(reg_idx),
|
||||
rdba & 0x00000000ffffffffULL);
|
||||
wr32(IGC_RDBAH(reg_idx), rdba >> 32);
|
||||
wr32(IGC_RDLEN(reg_idx),
|
||||
ring->count * sizeof(union igc_adv_rx_desc));
|
||||
|
||||
/* initialize head and tail */
|
||||
ring->tail = adapter->io_addr + IGC_RDT(reg_idx);
|
||||
wr32(IGC_RDH(reg_idx), 0);
|
||||
writel(0, ring->tail);
|
||||
|
||||
/* reset next-to- use/clean to place SW in sync with hardware */
|
||||
ring->next_to_clean = 0;
|
||||
ring->next_to_use = 0;
|
||||
|
||||
/* set descriptor configuration */
|
||||
srrctl = IGC_RX_HDR_LEN << IGC_SRRCTL_BSIZEHDRSIZE_SHIFT;
|
||||
if (ring_uses_large_buffer(ring))
|
||||
srrctl |= IGC_RXBUFFER_3072 >> IGC_SRRCTL_BSIZEPKT_SHIFT;
|
||||
else
|
||||
srrctl |= IGC_RXBUFFER_2048 >> IGC_SRRCTL_BSIZEPKT_SHIFT;
|
||||
srrctl |= IGC_SRRCTL_DESCTYPE_ADV_ONEBUF;
|
||||
|
||||
wr32(IGC_SRRCTL(reg_idx), srrctl);
|
||||
|
||||
rxdctl |= IGC_RX_PTHRESH;
|
||||
rxdctl |= IGC_RX_HTHRESH << 8;
|
||||
rxdctl |= IGC_RX_WTHRESH << 16;
|
||||
|
||||
/* initialize rx_buffer_info */
|
||||
memset(ring->rx_buffer_info, 0,
|
||||
sizeof(struct igc_rx_buffer) * ring->count);
|
||||
|
||||
/* initialize Rx descriptor 0 */
|
||||
rx_desc = IGC_RX_DESC(ring, 0);
|
||||
rx_desc->wb.upper.length = 0;
|
||||
|
||||
/* enable receive descriptor fetching */
|
||||
rxdctl |= IGC_RXDCTL_QUEUE_ENABLE;
|
||||
|
||||
wr32(IGC_RXDCTL(reg_idx), rxdctl);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_configure_rx - Configure receive Unit after Reset
|
||||
* @adapter: board private structure
|
||||
*
|
||||
* Configure the Rx unit of the MAC after a reset.
|
||||
*/
|
||||
static void igc_configure_rx(struct igc_adapter *adapter)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* Setup the HW Rx Head and Tail Descriptor Pointers and
|
||||
* the Base and Length of the Rx Descriptor Ring
|
||||
*/
|
||||
for (i = 0; i < adapter->num_rx_queues; i++)
|
||||
igc_configure_rx_ring(adapter, adapter->rx_ring[i]);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_configure_tx_ring - Configure transmit ring after Reset
|
||||
* @adapter: board private structure
|
||||
* @ring: tx ring to configure
|
||||
*
|
||||
* Configure a transmit ring after a reset.
|
||||
*/
|
||||
static void igc_configure_tx_ring(struct igc_adapter *adapter,
|
||||
struct igc_ring *ring)
|
||||
{
|
||||
struct igc_hw *hw = &adapter->hw;
|
||||
int reg_idx = ring->reg_idx;
|
||||
u64 tdba = ring->dma;
|
||||
u32 txdctl = 0;
|
||||
|
||||
/* disable the queue */
|
||||
wr32(IGC_TXDCTL(reg_idx), 0);
|
||||
wrfl();
|
||||
mdelay(10);
|
||||
|
||||
wr32(IGC_TDLEN(reg_idx),
|
||||
ring->count * sizeof(union igc_adv_tx_desc));
|
||||
wr32(IGC_TDBAL(reg_idx),
|
||||
tdba & 0x00000000ffffffffULL);
|
||||
wr32(IGC_TDBAH(reg_idx), tdba >> 32);
|
||||
|
||||
ring->tail = adapter->io_addr + IGC_TDT(reg_idx);
|
||||
wr32(IGC_TDH(reg_idx), 0);
|
||||
writel(0, ring->tail);
|
||||
|
||||
txdctl |= IGC_TX_PTHRESH;
|
||||
txdctl |= IGC_TX_HTHRESH << 8;
|
||||
txdctl |= IGC_TX_WTHRESH << 16;
|
||||
|
||||
txdctl |= IGC_TXDCTL_QUEUE_ENABLE;
|
||||
wr32(IGC_TXDCTL(reg_idx), txdctl);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_configure_tx - Configure transmit Unit after Reset
|
||||
* @adapter: board private structure
|
||||
*
|
||||
* Configure the Tx unit of the MAC after a reset.
|
||||
*/
|
||||
static void igc_configure_tx(struct igc_adapter *adapter)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < adapter->num_tx_queues; i++)
|
||||
igc_configure_tx_ring(adapter, adapter->tx_ring[i]);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_setup_mrqc - configure the multiple receive queue control registers
|
||||
* @adapter: Board private structure
|
||||
*/
|
||||
static void igc_setup_mrqc(struct igc_adapter *adapter)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_setup_rctl - configure the receive control registers
|
||||
* @adapter: Board private structure
|
||||
*/
|
||||
static void igc_setup_rctl(struct igc_adapter *adapter)
|
||||
{
|
||||
struct igc_hw *hw = &adapter->hw;
|
||||
u32 rctl;
|
||||
|
||||
rctl = rd32(IGC_RCTL);
|
||||
|
||||
rctl &= ~(3 << IGC_RCTL_MO_SHIFT);
|
||||
rctl &= ~(IGC_RCTL_LBM_TCVR | IGC_RCTL_LBM_MAC);
|
||||
|
||||
rctl |= IGC_RCTL_EN | IGC_RCTL_BAM | IGC_RCTL_RDMTS_HALF |
|
||||
(hw->mac.mc_filter_type << IGC_RCTL_MO_SHIFT);
|
||||
|
||||
/* enable stripping of CRC. Newer features require
|
||||
* that the HW strips the CRC.
|
||||
*/
|
||||
rctl |= IGC_RCTL_SECRC;
|
||||
|
||||
/* disable store bad packets and clear size bits. */
|
||||
rctl &= ~(IGC_RCTL_SBP | IGC_RCTL_SZ_256);
|
||||
|
||||
/* enable LPE to allow for reception of jumbo frames */
|
||||
rctl |= IGC_RCTL_LPE;
|
||||
|
||||
/* disable queue 0 to prevent tail write w/o re-config */
|
||||
wr32(IGC_RXDCTL(0), 0);
|
||||
|
||||
/* This is useful for sniffing bad packets. */
|
||||
if (adapter->netdev->features & NETIF_F_RXALL) {
|
||||
/* UPE and MPE will be handled by normal PROMISC logic
|
||||
* in set_rx_mode
|
||||
*/
|
||||
rctl |= (IGC_RCTL_SBP | /* Receive bad packets */
|
||||
IGC_RCTL_BAM | /* RX All Bcast Pkts */
|
||||
IGC_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
|
||||
|
||||
rctl &= ~(IGC_RCTL_DPF | /* Allow filtered pause */
|
||||
IGC_RCTL_CFIEN); /* Disable VLAN CFIEN Filter */
|
||||
}
|
||||
|
||||
wr32(IGC_RCTL, rctl);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_setup_tctl - configure the transmit control registers
|
||||
* @adapter: Board private structure
|
||||
*/
|
||||
static void igc_setup_tctl(struct igc_adapter *adapter)
|
||||
{
|
||||
struct igc_hw *hw = &adapter->hw;
|
||||
u32 tctl;
|
||||
|
||||
/* disable queue 0 which icould be enabled by default */
|
||||
wr32(IGC_TXDCTL(0), 0);
|
||||
|
||||
/* Program the Transmit Control Register */
|
||||
tctl = rd32(IGC_TCTL);
|
||||
tctl &= ~IGC_TCTL_CT;
|
||||
tctl |= IGC_TCTL_PSP | IGC_TCTL_RTLC |
|
||||
(IGC_COLLISION_THRESHOLD << IGC_CT_SHIFT);
|
||||
|
||||
/* Enable transmits */
|
||||
tctl |= IGC_TCTL_EN;
|
||||
|
||||
wr32(IGC_TCTL, tctl);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_set_mac - Change the Ethernet Address of the NIC
|
||||
* @netdev: network interface device structure
|
||||
|
|
@ -150,6 +673,121 @@ static netdev_tx_t igc_xmit_frame(struct sk_buff *skb,
|
|||
return NETDEV_TX_OK;
|
||||
}
|
||||
|
||||
static inline unsigned int igc_rx_offset(struct igc_ring *rx_ring)
|
||||
{
|
||||
return ring_uses_build_skb(rx_ring) ? IGC_SKB_PAD : 0;
|
||||
}
|
||||
|
||||
static bool igc_alloc_mapped_page(struct igc_ring *rx_ring,
|
||||
struct igc_rx_buffer *bi)
|
||||
{
|
||||
struct page *page = bi->page;
|
||||
dma_addr_t dma;
|
||||
|
||||
/* since we are recycling buffers we should seldom need to alloc */
|
||||
if (likely(page))
|
||||
return true;
|
||||
|
||||
/* alloc new page for storage */
|
||||
page = dev_alloc_pages(igc_rx_pg_order(rx_ring));
|
||||
if (unlikely(!page)) {
|
||||
rx_ring->rx_stats.alloc_failed++;
|
||||
return false;
|
||||
}
|
||||
|
||||
/* map page for use */
|
||||
dma = dma_map_page_attrs(rx_ring->dev, page, 0,
|
||||
igc_rx_pg_size(rx_ring),
|
||||
DMA_FROM_DEVICE,
|
||||
IGC_RX_DMA_ATTR);
|
||||
|
||||
/* if mapping failed free memory back to system since
|
||||
* there isn't much point in holding memory we can't use
|
||||
*/
|
||||
if (dma_mapping_error(rx_ring->dev, dma)) {
|
||||
__free_page(page);
|
||||
|
||||
rx_ring->rx_stats.alloc_failed++;
|
||||
return false;
|
||||
}
|
||||
|
||||
bi->dma = dma;
|
||||
bi->page = page;
|
||||
bi->page_offset = igc_rx_offset(rx_ring);
|
||||
bi->pagecnt_bias = 1;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_alloc_rx_buffers - Replace used receive buffers; packet split
|
||||
* @adapter: address of board private structure
|
||||
*/
|
||||
static void igc_alloc_rx_buffers(struct igc_ring *rx_ring, u16 cleaned_count)
|
||||
{
|
||||
union igc_adv_rx_desc *rx_desc;
|
||||
u16 i = rx_ring->next_to_use;
|
||||
struct igc_rx_buffer *bi;
|
||||
u16 bufsz;
|
||||
|
||||
/* nothing to do */
|
||||
if (!cleaned_count)
|
||||
return;
|
||||
|
||||
rx_desc = IGC_RX_DESC(rx_ring, i);
|
||||
bi = &rx_ring->rx_buffer_info[i];
|
||||
i -= rx_ring->count;
|
||||
|
||||
bufsz = igc_rx_bufsz(rx_ring);
|
||||
|
||||
do {
|
||||
if (!igc_alloc_mapped_page(rx_ring, bi))
|
||||
break;
|
||||
|
||||
/* sync the buffer for use by the device */
|
||||
dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
|
||||
bi->page_offset, bufsz,
|
||||
DMA_FROM_DEVICE);
|
||||
|
||||
/* Refresh the desc even if buffer_addrs didn't change
|
||||
* because each write-back erases this info.
|
||||
*/
|
||||
rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
|
||||
|
||||
rx_desc++;
|
||||
bi++;
|
||||
i++;
|
||||
if (unlikely(!i)) {
|
||||
rx_desc = IGC_RX_DESC(rx_ring, 0);
|
||||
bi = rx_ring->rx_buffer_info;
|
||||
i -= rx_ring->count;
|
||||
}
|
||||
|
||||
/* clear the length for the next_to_use descriptor */
|
||||
rx_desc->wb.upper.length = 0;
|
||||
|
||||
cleaned_count--;
|
||||
} while (cleaned_count);
|
||||
|
||||
i += rx_ring->count;
|
||||
|
||||
if (rx_ring->next_to_use != i) {
|
||||
/* record the next descriptor to use */
|
||||
rx_ring->next_to_use = i;
|
||||
|
||||
/* update next to alloc since we have filled the ring */
|
||||
rx_ring->next_to_alloc = i;
|
||||
|
||||
/* Force memory writes to complete before letting h/w
|
||||
* know there are new descriptors to fetch. (Only
|
||||
* applicable for weak-ordered memory model archs,
|
||||
* such as IA-64).
|
||||
*/
|
||||
wmb();
|
||||
writel(i, rx_ring->tail);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_ioctl - I/O control method
|
||||
* @netdev: network interface device structure
|
||||
|
|
@ -189,6 +827,11 @@ static void igc_up(struct igc_adapter *adapter)
|
|||
/* Clear any pending interrupts. */
|
||||
rd32(IGC_ICR);
|
||||
igc_irq_enable(adapter);
|
||||
|
||||
netif_tx_start_all_queues(adapter->netdev);
|
||||
|
||||
/* start the watchdog. */
|
||||
hw->mac.get_link_status = 1;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -287,7 +930,30 @@ static struct net_device_stats *igc_get_stats(struct net_device *netdev)
|
|||
*/
|
||||
static void igc_configure(struct igc_adapter *adapter)
|
||||
{
|
||||
struct net_device *netdev = adapter->netdev;
|
||||
int i = 0;
|
||||
|
||||
igc_get_hw_control(adapter);
|
||||
igc_set_rx_mode(netdev);
|
||||
|
||||
igc_setup_tctl(adapter);
|
||||
igc_setup_mrqc(adapter);
|
||||
igc_setup_rctl(adapter);
|
||||
|
||||
igc_configure_tx(adapter);
|
||||
igc_configure_rx(adapter);
|
||||
|
||||
igc_rx_fifo_flush_base(&adapter->hw);
|
||||
|
||||
/* call igc_desc_unused which always leaves
|
||||
* at least 1 descriptor unused to make sure
|
||||
* next_to_use != next_to_clean
|
||||
*/
|
||||
for (i = 0; i < adapter->num_rx_queues; i++) {
|
||||
struct igc_ring *ring = adapter->rx_ring[i];
|
||||
|
||||
igc_alloc_rx_buffers(ring, igc_desc_unused(ring));
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -335,6 +1001,19 @@ static void igc_set_default_mac_filter(struct igc_adapter *adapter)
|
|||
igc_rar_set_index(adapter, 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
|
||||
* @netdev: network interface device structure
|
||||
*
|
||||
* The set_rx_mode entry point is called whenever the unicast or multicast
|
||||
* address lists or the network interface flags are updated. This routine is
|
||||
* responsible for configuring the hardware for proper unicast, multicast,
|
||||
* promiscuous mode, and all-multi behavior.
|
||||
*/
|
||||
static void igc_set_rx_mode(struct net_device *netdev)
|
||||
{
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_msix_other - msix other interrupt handler
|
||||
* @irq: interrupt number
|
||||
|
|
@ -784,6 +1463,83 @@ static void igc_update_itr(struct igc_q_vector *q_vector,
|
|||
ring_container->itr = itrval;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_intr_msi - Interrupt Handler
|
||||
* @irq: interrupt number
|
||||
* @data: pointer to a network interface device structure
|
||||
*/
|
||||
static irqreturn_t igc_intr_msi(int irq, void *data)
|
||||
{
|
||||
struct igc_adapter *adapter = data;
|
||||
struct igc_q_vector *q_vector = adapter->q_vector[0];
|
||||
struct igc_hw *hw = &adapter->hw;
|
||||
/* read ICR disables interrupts using IAM */
|
||||
u32 icr = rd32(IGC_ICR);
|
||||
|
||||
igc_write_itr(q_vector);
|
||||
|
||||
if (icr & IGC_ICR_DRSTA)
|
||||
schedule_work(&adapter->reset_task);
|
||||
|
||||
if (icr & IGC_ICR_DOUTSYNC) {
|
||||
/* HW is reporting DMA is out of sync */
|
||||
adapter->stats.doosync++;
|
||||
}
|
||||
|
||||
if (icr & (IGC_ICR_RXSEQ | IGC_ICR_LSC)) {
|
||||
hw->mac.get_link_status = 1;
|
||||
if (!test_bit(__IGC_DOWN, &adapter->state))
|
||||
mod_timer(&adapter->watchdog_timer, jiffies + 1);
|
||||
}
|
||||
|
||||
napi_schedule(&q_vector->napi);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_intr - Legacy Interrupt Handler
|
||||
* @irq: interrupt number
|
||||
* @data: pointer to a network interface device structure
|
||||
*/
|
||||
static irqreturn_t igc_intr(int irq, void *data)
|
||||
{
|
||||
struct igc_adapter *adapter = data;
|
||||
struct igc_q_vector *q_vector = adapter->q_vector[0];
|
||||
struct igc_hw *hw = &adapter->hw;
|
||||
/* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
|
||||
* need for the IMC write
|
||||
*/
|
||||
u32 icr = rd32(IGC_ICR);
|
||||
|
||||
/* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
|
||||
* not set, then the adapter didn't send an interrupt
|
||||
*/
|
||||
if (!(icr & IGC_ICR_INT_ASSERTED))
|
||||
return IRQ_NONE;
|
||||
|
||||
igc_write_itr(q_vector);
|
||||
|
||||
if (icr & IGC_ICR_DRSTA)
|
||||
schedule_work(&adapter->reset_task);
|
||||
|
||||
if (icr & IGC_ICR_DOUTSYNC) {
|
||||
/* HW is reporting DMA is out of sync */
|
||||
adapter->stats.doosync++;
|
||||
}
|
||||
|
||||
if (icr & (IGC_ICR_RXSEQ | IGC_ICR_LSC)) {
|
||||
hw->mac.get_link_status = 1;
|
||||
/* guard against interrupt when we're going down */
|
||||
if (!test_bit(__IGC_DOWN, &adapter->state))
|
||||
mod_timer(&adapter->watchdog_timer, jiffies + 1);
|
||||
}
|
||||
|
||||
napi_schedule(&q_vector->napi);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void igc_set_itr(struct igc_q_vector *q_vector)
|
||||
{
|
||||
struct igc_adapter *adapter = q_vector->adapter;
|
||||
|
|
@ -1146,6 +1902,29 @@ err_out:
|
|||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_cache_ring_register - Descriptor ring to register mapping
|
||||
* @adapter: board private structure to initialize
|
||||
*
|
||||
* Once we know the feature-set enabled for the device, we'll cache
|
||||
* the register offset the descriptor ring is assigned to.
|
||||
*/
|
||||
static void igc_cache_ring_register(struct igc_adapter *adapter)
|
||||
{
|
||||
int i = 0, j = 0;
|
||||
|
||||
switch (adapter->hw.mac.type) {
|
||||
case igc_i225:
|
||||
/* Fall through */
|
||||
default:
|
||||
for (; i < adapter->num_rx_queues; i++)
|
||||
adapter->rx_ring[i]->reg_idx = i;
|
||||
for (; j < adapter->num_tx_queues; j++)
|
||||
adapter->tx_ring[j]->reg_idx = j;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* igc_init_interrupt_scheme - initialize interrupts, allocate queues/vectors
|
||||
* @adapter: Pointer to adapter structure
|
||||
|
|
@ -1165,6 +1944,8 @@ static int igc_init_interrupt_scheme(struct igc_adapter *adapter, bool msix)
|
|||
goto err_alloc_q_vectors;
|
||||
}
|
||||
|
||||
igc_cache_ring_register(adapter);
|
||||
|
||||
return 0;
|
||||
|
||||
err_alloc_q_vectors:
|
||||
|
|
@ -1252,6 +2033,8 @@ static void igc_irq_enable(struct igc_adapter *adapter)
|
|||
*/
|
||||
static int igc_request_irq(struct igc_adapter *adapter)
|
||||
{
|
||||
struct net_device *netdev = adapter->netdev;
|
||||
struct pci_dev *pdev = adapter->pdev;
|
||||
int err = 0;
|
||||
|
||||
if (adapter->flags & IGC_FLAG_HAS_MSIX) {
|
||||
|
|
@ -1259,14 +2042,38 @@ static int igc_request_irq(struct igc_adapter *adapter)
|
|||
if (!err)
|
||||
goto request_done;
|
||||
/* fall back to MSI */
|
||||
igc_free_all_tx_resources(adapter);
|
||||
igc_free_all_rx_resources(adapter);
|
||||
|
||||
igc_clear_interrupt_scheme(adapter);
|
||||
err = igc_init_interrupt_scheme(adapter, false);
|
||||
if (err)
|
||||
goto request_done;
|
||||
igc_setup_all_tx_resources(adapter);
|
||||
igc_setup_all_rx_resources(adapter);
|
||||
igc_configure(adapter);
|
||||
}
|
||||
|
||||
igc_assign_vector(adapter->q_vector[0], 0);
|
||||
|
||||
if (adapter->flags & IGC_FLAG_HAS_MSI) {
|
||||
err = request_irq(pdev->irq, &igc_intr_msi, 0,
|
||||
netdev->name, adapter);
|
||||
if (!err)
|
||||
goto request_done;
|
||||
|
||||
/* fall back to legacy interrupts */
|
||||
igc_reset_interrupt_capability(adapter);
|
||||
adapter->flags &= ~IGC_FLAG_HAS_MSI;
|
||||
}
|
||||
|
||||
err = request_irq(pdev->irq, &igc_intr, IRQF_SHARED,
|
||||
netdev->name, adapter);
|
||||
|
||||
if (err)
|
||||
dev_err(&pdev->dev, "Error %d getting interrupt\n",
|
||||
err);
|
||||
|
||||
request_done:
|
||||
return err;
|
||||
}
|
||||
|
|
@ -1315,6 +2122,16 @@ static int __igc_open(struct net_device *netdev, bool resuming)
|
|||
|
||||
netif_carrier_off(netdev);
|
||||
|
||||
/* allocate transmit descriptors */
|
||||
err = igc_setup_all_tx_resources(adapter);
|
||||
if (err)
|
||||
goto err_setup_tx;
|
||||
|
||||
/* allocate receive descriptors */
|
||||
err = igc_setup_all_rx_resources(adapter);
|
||||
if (err)
|
||||
goto err_setup_rx;
|
||||
|
||||
igc_power_up_link(adapter);
|
||||
|
||||
igc_configure(adapter);
|
||||
|
|
@ -1341,6 +2158,8 @@ static int __igc_open(struct net_device *netdev, bool resuming)
|
|||
rd32(IGC_ICR);
|
||||
igc_irq_enable(adapter);
|
||||
|
||||
netif_tx_start_all_queues(netdev);
|
||||
|
||||
/* start the watchdog. */
|
||||
hw->mac.get_link_status = 1;
|
||||
|
||||
|
|
@ -1351,6 +2170,11 @@ err_set_queues:
|
|||
err_req_irq:
|
||||
igc_release_hw_control(adapter);
|
||||
igc_power_down_link(adapter);
|
||||
igc_free_all_rx_resources(adapter);
|
||||
err_setup_rx:
|
||||
igc_free_all_tx_resources(adapter);
|
||||
err_setup_tx:
|
||||
igc_reset(adapter);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
|
@ -1383,6 +2207,9 @@ static int __igc_close(struct net_device *netdev, bool suspending)
|
|||
|
||||
igc_free_irq(adapter);
|
||||
|
||||
igc_free_all_tx_resources(adapter);
|
||||
igc_free_all_rx_resources(adapter);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -168,6 +168,9 @@
|
|||
#define IGC_SCVPC 0x04228 /* SerDes/SGMII Code Violation Pkt Count */
|
||||
#define IGC_HRMPC 0x0A018 /* Header Redirection Missed Packet Count */
|
||||
|
||||
/* Management registers */
|
||||
#define IGC_MANC 0x05820 /* Management Control - RW */
|
||||
|
||||
/* forward declaration */
|
||||
struct igc_hw;
|
||||
u32 igc_rd32(struct igc_hw *hw, u32 reg);
|
||||
|
|
|
|||
Загрузка…
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