1f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 2f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Copyright (c) 2005 Ammasso, Inc. All rights reserved. 3f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved. 4f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * 5f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * This software is available to you under a choice of one of two 6f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * licenses. You may choose to be licensed under the terms of the GNU 7f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * General Public License (GPL) Version 2, available from the file 8f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * COPYING in the main directory of this source tree, or the 9f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * OpenIB.org BSD license below: 10f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * 11f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Redistribution and use in source and binary forms, with or 12f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * without modification, are permitted provided that the following 13f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * conditions are met: 14f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * 15f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * - Redistributions of source code must retain the above 16f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * copyright notice, this list of conditions and the following 17f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * disclaimer. 18f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * 19f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * - Redistributions in binary form must reproduce the above 20f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * copyright notice, this list of conditions and the following 21f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * disclaimer in the documentation and/or other materials 22f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * provided with the distribution. 23f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * 24f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * SOFTWARE. 32f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 33f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/module.h> 34f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/moduleparam.h> 35f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/pci.h> 36f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/netdevice.h> 37f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/etherdevice.h> 38f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/inetdevice.h> 39a6b7a407865aab9f849dd99a71072b7cd1175116Alexey Dobriyan#include <linux/interrupt.h> 40f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/delay.h> 41f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/ethtool.h> 42f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/mii.h> 43f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/if_vlan.h> 44f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/crc32.h> 45f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/in.h> 46f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/ip.h> 47f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/tcp.h> 48f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/init.h> 49f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/dma-mapping.h> 505a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 5170c71606190e9115e5f8363bfcd164c582eb314aPaul Gortmaker#include <linux/prefetch.h> 52f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 53f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <asm/io.h> 54f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <asm/irq.h> 55f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <asm/byteorder.h> 56f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 57f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <rdma/ib_smi.h> 58f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include "c2.h" 59f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include "c2_provider.h" 60f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 61f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_AUTHOR("Tom Tucker <tom@opengridcomputing.com>"); 62f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_DESCRIPTION("Ammasso AMSO1100 Low-level iWARP Driver"); 63f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_LICENSE("Dual BSD/GPL"); 64f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_VERSION(DRV_VERSION); 65f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 66f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK 67f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN; 68f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 69f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int debug = -1; /* defaults above */ 70f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckermodule_param(debug, int, 0); 71f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 72f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 73f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_up(struct net_device *netdev); 74f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_down(struct net_device *netdev); 75f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev); 76f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_interrupt(struct net_device *netdev); 77f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_interrupt(struct net_device *netdev); 787d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsstatic irqreturn_t c2_interrupt(int irq, void *dev_id); 79f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_timeout(struct net_device *netdev); 80f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_change_mtu(struct net_device *netdev, int new_mtu); 81f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_reset(struct c2_port *c2_port); 82f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 83f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct pci_device_id c2_pci_table[] = { 84f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker { PCI_DEVICE(0x18b8, 0xb001) }, 85f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker { 0 } 86f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker}; 87f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 88f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_DEVICE_TABLE(pci, c2_pci_table); 89f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 90f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_print_macaddr(struct net_device *netdev) 91f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 92181c74e87eb93df447a759af93cf0a279875ea7dTobias Klauser pr_debug("%s: MAC %pM, IRQ %u\n", netdev->name, netdev->dev_addr, netdev->irq); 93f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 94f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 95f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_set_rxbufsize(struct c2_port *c2_port) 96f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 97f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = c2_port->netdev; 98f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 99f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netdev->mtu > RX_BUF_SIZE) 100f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->rx_buf_size = 101f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->mtu + ETH_HLEN + sizeof(struct c2_rxp_hdr) + 102f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker NET_IP_ALIGN; 103f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker else 104f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->rx_buf_size = sizeof(struct c2_rxp_hdr) + RX_BUF_SIZE; 105f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 106f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 107f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 108f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate TX ring elements and chain them together. 109f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * One-to-one association of adapter descriptors with ring elements. 110f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 111f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_tx_ring_alloc(struct c2_ring *tx_ring, void *vaddr, 112f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t base, void __iomem * mmio_txp_ring) 113f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 114f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_tx_desc *tx_desc; 115f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_txp_desc __iomem *txp_desc; 116f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 117f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int i; 118f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 119f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->start = kmalloc(sizeof(*elem) * tx_ring->count, GFP_KERNEL); 120f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!tx_ring->start) 121f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -ENOMEM; 122f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 123f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = tx_ring->start; 124f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc = vaddr; 125f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_desc = mmio_txp_ring; 126f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < tx_ring->count; i++, elem++, tx_desc++, txp_desc++) { 127f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->len = 0; 128f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->status = 0; 129f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 130f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set TXP_HTXD_UNINIT */ 131dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(0x1122334455667788ULL), 132f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) txp_desc + C2_TXP_ADDR); 133f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, (void __iomem *) txp_desc + C2_TXP_LEN); 134dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_UNINIT), 135f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) txp_desc + C2_TXP_FLAGS); 136f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 137f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 138f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->ht_desc = tx_desc; 139f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc = txp_desc; 140f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 141f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (i == tx_ring->count - 1) { 142f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = tx_ring->start; 143f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->next_offset = base; 144f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 145f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = elem + 1; 146f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->next_offset = 147f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker base + (i + 1) * sizeof(*tx_desc); 148f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 149f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 150f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 151f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->to_use = tx_ring->to_clean = tx_ring->start; 152f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 153f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 154f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 155f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 156f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 157f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate RX ring elements and chain them together. 158f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * One-to-one association of adapter descriptors with ring elements. 159f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 160f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_rx_ring_alloc(struct c2_ring *rx_ring, void *vaddr, 161f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t base, void __iomem * mmio_rxp_ring) 162f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 163f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc; 164f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_desc __iomem *rxp_desc; 165f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 166f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int i; 167f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 168f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->start = kmalloc(sizeof(*elem) * rx_ring->count, GFP_KERNEL); 169f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!rx_ring->start) 170f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -ENOMEM; 171f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 172f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = rx_ring->start; 173f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc = vaddr; 174f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_desc = mmio_rxp_ring; 175f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < rx_ring->count; i++, elem++, rx_desc++, rxp_desc++) { 176f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->len = 0; 177f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->status = 0; 178f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 179f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set RXP_HRXD_UNINIT */ 180dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_OK), 181f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) rxp_desc + C2_RXP_STATUS); 182f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_COUNT); 183f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_LEN); 184dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(0x99aabbccddeeffULL), 185f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) rxp_desc + C2_RXP_ADDR); 186dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_UNINIT), 187f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) rxp_desc + C2_RXP_FLAGS); 188f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 189f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 190f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->ht_desc = rx_desc; 191f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc = rxp_desc; 192f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 193f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (i == rx_ring->count - 1) { 194f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = rx_ring->start; 195f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->next_offset = base; 196f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 197f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = elem + 1; 198f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->next_offset = 199f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker base + (i + 1) * sizeof(*rx_desc); 200f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 201f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 202f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 203f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->to_use = rx_ring->to_clean = rx_ring->start; 204f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 205f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 206f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 207f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 208f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Setup buffer for receiving */ 209f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic inline int c2_rx_alloc(struct c2_port *c2_port, struct c2_element *elem) 210f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 211f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 212f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc = elem->ht_desc; 213f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct sk_buff *skb; 214f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t mapaddr; 215f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker u32 maplen; 216f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_hdr *rxp_hdr; 217f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 218f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb = dev_alloc_skb(c2_port->rx_buf_size); 219f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (unlikely(!skb)) { 220f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: out of memory for receive\n", 221f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netdev->name); 222f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -ENOMEM; 223f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 224f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 225f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Zero out the rxp hdr in the sk_buff */ 226f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker memset(skb->data, 0, sizeof(*rxp_hdr)); 227f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 228f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->dev = c2_port->netdev; 229f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 230f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker maplen = c2_port->rx_buf_size; 231f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mapaddr = 232f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_map_single(c2dev->pcidev, skb->data, maplen, 233f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker PCI_DMA_FROMDEVICE); 234f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 235f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set the sk_buff RXP_header to RXP_HRXD_READY */ 236f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr = (struct c2_rxp_hdr *) skb->data; 237f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr->flags = RXP_HRXD_READY; 238f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 239f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); 240dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16((u16) maplen - sizeof(*rxp_hdr)), 241f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_LEN); 242dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(mapaddr), elem->hw_desc + C2_RXP_ADDR); 243dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY), 244dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier elem->hw_desc + C2_RXP_FLAGS); 245f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 246f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = skb; 247f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->mapaddr = mapaddr; 248f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen = maplen; 249f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->len = maplen; 250f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 251f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 252f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 253f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 254f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 255f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate buffers for the Rx ring 256f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * For receive: rx_ring.to_clean is next received frame 257f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 258f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_rx_fill(struct c2_port *c2_port) 259f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 260f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *rx_ring = &c2_port->rx_ring; 261f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 262f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int ret = 0; 263f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 264f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = rx_ring->start; 265f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 266f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_rx_alloc(c2_port, elem)) { 267f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = 1; 268f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 269f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 270f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while ((elem = elem->next) != rx_ring->start); 271f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 272f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->to_clean = rx_ring->start; 273f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 274f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 275f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 276f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Free all buffers in RX ring, assumes receiver stopped */ 277f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_clean(struct c2_port *c2_port) 278f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 279f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 280f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *rx_ring = &c2_port->rx_ring; 281f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 282f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc; 283f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 284f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = rx_ring->start; 285f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 286f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc = elem->ht_desc; 287f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->len = 0; 288f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 289f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); 290f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_COUNT); 291f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_LEN); 292dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(0x99aabbccddeeffULL), 293f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_ADDR); 294dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_UNINIT), 295f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_FLAGS); 296f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 297f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (elem->skb) { 298f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_unmap_single(c2dev->pcidev, elem->mapaddr, 299f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen, PCI_DMA_FROMDEVICE); 300f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dev_kfree_skb(elem->skb); 301f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 302f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 303f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while ((elem = elem->next) != rx_ring->start); 304f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 305f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 306f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic inline int c2_tx_free(struct c2_dev *c2dev, struct c2_element *elem) 307f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 308f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_tx_desc *tx_desc = elem->ht_desc; 309f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 310f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->len = 0; 311f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 312f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_unmap_single(c2dev->pcidev, elem->mapaddr, elem->maplen, 313f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker PCI_DMA_TODEVICE); 314f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 315f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (elem->skb) { 316f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dev_kfree_skb_any(elem->skb); 317f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 318f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 319f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 320f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 321f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 322f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 323f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Free all buffers in TX ring, assumes transmitter stopped */ 324f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_clean(struct c2_port *c2_port) 325f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 326f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *tx_ring = &c2_port->tx_ring; 327f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 328f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_txp_desc txp_htxd; 329f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int retry; 330f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long flags; 331f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 332f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_irqsave(&c2_port->tx_lock, flags); 333f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 334f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = tx_ring->start; 335f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 336f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 337f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker retry = 0; 338f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 339f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.flags = 340f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker readw(elem->hw_desc + C2_TXP_FLAGS); 341f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 342f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (txp_htxd.flags == TXP_HTXD_READY) { 343f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker retry = 1; 344f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, 345f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_LEN); 346f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(0, 347f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_ADDR); 348dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_DONE), 349f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_FLAGS); 350687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger c2_port->netdev->stats.tx_dropped++; 351f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 352f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 353f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, 354f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_LEN); 355dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(0x1122334455667788ULL), 356f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_ADDR); 357dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_UNINIT), 358f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_FLAGS); 359f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 360f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 361f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_free(c2_port->c2dev, elem); 362f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 363f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while ((elem = elem->next) != tx_ring->start); 364f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while (retry); 365f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 366f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_avail = c2_port->tx_ring.count - 1; 367f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->c2dev->cur_tx = tx_ring->to_use - tx_ring->start; 368f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 369f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_port->tx_avail > MAX_SKB_FRAGS + 1) 370f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_wake_queue(c2_port->netdev); 371f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 372f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock_irqrestore(&c2_port->tx_lock, flags); 373f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 374f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 375f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 376f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Process transmit descriptors marked 'DONE' by the firmware, 377f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * freeing up their unneeded sk_buffs. 378f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 379f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_interrupt(struct net_device *netdev) 380f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 381f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 382f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 383f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *tx_ring = &c2_port->tx_ring; 384f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 385f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_txp_desc txp_htxd; 386f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 387f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock(&c2_port->tx_lock); 388f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 389f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (elem = tx_ring->to_clean; elem != tx_ring->to_use; 390f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = elem->next) { 391f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.flags = 392dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier be16_to_cpu((__force __be16) readw(elem->hw_desc + C2_TXP_FLAGS)); 393f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 394f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (txp_htxd.flags != TXP_HTXD_DONE) 395f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 396f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 397f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_tx_done(c2_port)) { 398f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* PCI reads are expensive in fast path */ 399f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.len = 400dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier be16_to_cpu((__force __be16) readw(elem->hw_desc + C2_TXP_LEN)); 401f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: tx done slot %3Zu status 0x%x len " 402f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "%5u bytes\n", 403f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name, elem - tx_ring->start, 404f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.flags, txp_htxd.len); 405f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 406f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 407f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_free(c2dev, elem); 408f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ++(c2_port->tx_avail); 409f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 410f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 411f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->to_clean = elem; 412f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 413f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_queue_stopped(netdev) 414f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker && c2_port->tx_avail > MAX_SKB_FRAGS + 1) 415f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_wake_queue(netdev); 416f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 417f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock(&c2_port->tx_lock); 418f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 419f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 420f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_error(struct c2_port *c2_port, struct c2_element *elem) 421f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 422f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc = elem->ht_desc; 423f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_hdr *rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data; 424f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 425f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (rxp_hdr->status != RXP_HRXD_OK || 426f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr->len > (rx_desc->len - sizeof(*rxp_hdr))) { 427f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAD RXP_HRXD\n"); 428f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" rx_desc : %p\n", rx_desc); 429f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" index : %Zu\n", 430f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem - c2_port->rx_ring.start); 431f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" len : %u\n", rx_desc->len); 432f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" rxp_hdr : %p [PA %p]\n", rxp_hdr, 433f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void *) __pa((unsigned long) rxp_hdr)); 434f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" flags : 0x%x\n", rxp_hdr->flags); 435f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" status: 0x%x\n", rxp_hdr->status); 436f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" len : %u\n", rxp_hdr->len); 437f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" rsvd : 0x%x\n", rxp_hdr->rsvd); 438f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 439f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 440f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Setup the skb for reuse since we're dropping this pkt */ 44127a884dc3cb63b93c2b3b643f5b31eed5f8a4d26Arnaldo Carvalho de Melo elem->skb->data = elem->skb->head; 44227a884dc3cb63b93c2b3b643f5b31eed5f8a4d26Arnaldo Carvalho de Melo skb_reset_tail_pointer(elem->skb); 443f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 444f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Zero out the rxp hdr in the sk_buff */ 445f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker memset(elem->skb->data, 0, sizeof(*rxp_hdr)); 446f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 447f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Write the descriptor to the adapter's rx ring */ 448f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); 449f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_COUNT); 450dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16((u16) elem->maplen - sizeof(*rxp_hdr)), 451f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_LEN); 452dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(elem->mapaddr), 453dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier elem->hw_desc + C2_RXP_ADDR); 454dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY), 455dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier elem->hw_desc + C2_RXP_FLAGS); 456f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 457f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("packet dropped\n"); 458687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger c2_port->netdev->stats.rx_dropped++; 459f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 460f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 461f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_interrupt(struct net_device *netdev) 462f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 463f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 464f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 465f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *rx_ring = &c2_port->rx_ring; 466f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 467f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc; 468f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_hdr *rxp_hdr; 469f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct sk_buff *skb; 470f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t mapaddr; 471f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker u32 maplen, buflen; 472f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long flags; 473f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 474f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_irqsave(&c2dev->lock, flags); 475f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 476f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Begin where we left off */ 477f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->to_clean = rx_ring->start + c2dev->cur_rx; 478f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 479f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (elem = rx_ring->to_clean; elem->next != rx_ring->to_clean; 480f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = elem->next) { 481f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc = elem->ht_desc; 482f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mapaddr = elem->mapaddr; 483f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker maplen = elem->maplen; 484f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb = elem->skb; 485f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr = (struct c2_rxp_hdr *) skb->data; 486f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 487f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (rxp_hdr->flags != RXP_HRXD_DONE) 488f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 489f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker buflen = rxp_hdr->len; 490f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 491f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Sanity check the RXP header */ 492f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (rxp_hdr->status != RXP_HRXD_OK || 493f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker buflen > (rx_desc->len - sizeof(*rxp_hdr))) { 494f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_error(c2_port, elem); 495f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker continue; 496f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 497f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 498f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* 499f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate and map a new skb for replenishing the host 500f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * RX desc 501f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 502f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_rx_alloc(c2_port, elem)) { 503f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_error(c2_port, elem); 504f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker continue; 505f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 506f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 507f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unmap the old skb */ 508f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_unmap_single(c2dev->pcidev, mapaddr, maplen, 509f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker PCI_DMA_FROMDEVICE); 510f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 511f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker prefetch(skb->data); 512f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 513f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* 514f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Skip past the leading 8 bytes comprising of the 515f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * "struct c2_rxp_hdr", prepended by the adapter 516f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * to the usual Ethernet header ("struct ethhdr"), 517f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * to the start of the raw Ethernet packet. 518f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * 519f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Fix up the various fields in the sk_buff before 520f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * passing it up to netif_rx(). The transfer size 521f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * (in bytes) specified by the adapter len field of 522f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * the "struct rxp_hdr_t" does NOT include the 523f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * "sizeof(struct c2_rxp_hdr)". 524f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 525f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->data += sizeof(*rxp_hdr); 52627a884dc3cb63b93c2b3b643f5b31eed5f8a4d26Arnaldo Carvalho de Melo skb_set_tail_pointer(skb, buflen); 527f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->len = buflen; 528f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->protocol = eth_type_trans(skb, netdev); 529f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 530f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_rx(skb); 531f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 532687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger netdev->stats.rx_packets++; 533687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger netdev->stats.rx_bytes += buflen; 534f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 535f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 536f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Save where we left off */ 537f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->to_clean = elem; 538f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->cur_rx = elem - rx_ring->start; 539f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_SET_CUR_RX(c2dev, c2dev->cur_rx); 540f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 541f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock_irqrestore(&c2dev->lock, flags); 542f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 543f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 544f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 545f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Handle netisr0 TX & RX interrupts. 546f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 5477d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsstatic irqreturn_t c2_interrupt(int irq, void *dev_id) 548f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 549f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned int netisr0, dmaisr; 550f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int handled = 0; 551f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = (struct c2_dev *) dev_id; 552f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 553f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Process CCILNET interrupts */ 554f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netisr0 = readl(c2dev->regs + C2_NISR0); 555f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netisr0) { 556f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 557f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* 558f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * There is an issue with the firmware that always 559f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * provides the status of RX for both TX & RX 560f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * interrupts. So process both queues here. 561f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 562f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_interrupt(c2dev->netdev); 563f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_interrupt(c2dev->netdev); 564f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 565f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Clear the interrupt */ 566f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(netisr0, c2dev->regs + C2_NISR0); 567f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker handled++; 568f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 569f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 570f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Process RNIC interrupts */ 571f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dmaisr = readl(c2dev->regs + C2_DISR); 572f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (dmaisr) { 573f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(dmaisr, c2dev->regs + C2_DISR); 574f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rnic_interrupt(c2dev); 575f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker handled++; 576f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 577f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 578f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (handled) { 579f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return IRQ_HANDLED; 580f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 581f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return IRQ_NONE; 582f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 583f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 584f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 585f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_up(struct net_device *netdev) 586f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 587f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 588f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 589f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 590f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_hdr *rxp_hdr; 591f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct in_device *in_dev; 592f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker size_t rx_size, tx_size; 593f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int ret, i; 594f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned int netimr0; 595f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 596f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_ifup(c2_port)) 597f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: enabling interface\n", netdev->name); 598f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 599f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set the Rx buffer size based on MTU */ 600f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_set_rxbufsize(c2_port); 601f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 602f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Allocate DMA'able memory for Tx/Rx host descriptor rings */ 603f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_size = c2_port->rx_ring.count * sizeof(struct c2_rx_desc); 604f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_size = c2_port->tx_ring.count * sizeof(struct c2_tx_desc); 605f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 606f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->mem_size = tx_size + rx_size; 6079011a67b2fe9b89048bcba81745ef34394f6f7abJoe Perches c2_port->mem = pci_zalloc_consistent(c2dev->pcidev, c2_port->mem_size, 6089011a67b2fe9b89048bcba81745ef34394f6f7abJoe Perches &c2_port->dma); 609f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_port->mem == NULL) { 610f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Unable to allocate memory for " 611f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "host descriptor rings\n"); 612f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -ENOMEM; 613f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 614f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 615f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Create the Rx host descriptor ring */ 616f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((ret = 617f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_ring_alloc(&c2_port->rx_ring, c2_port->mem, c2_port->dma, 618f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_rxp_ring))) { 619f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Unable to create RX ring\n"); 620f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail0; 621f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 622f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 623f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Allocate Rx buffers for the host descriptor ring */ 624f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_rx_fill(c2_port)) { 625f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Unable to fill RX ring\n"); 626f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 627f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 628f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 629f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Create the Tx host descriptor ring */ 630f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((ret = c2_tx_ring_alloc(&c2_port->tx_ring, c2_port->mem + rx_size, 631f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->dma + rx_size, 632f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_txp_ring))) { 633f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Unable to create TX ring\n"); 634f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 635f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 636f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 637f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set the TX pointer to where we left off */ 638f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_avail = c2_port->tx_ring.count - 1; 639f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_ring.to_use = c2_port->tx_ring.to_clean = 640f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_ring.start + c2dev->cur_tx; 641f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 642f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Initialize MAC */ 643f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 644f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker BUG_ON(c2_port->tx_ring.to_use != c2_port->tx_ring.to_clean); 645f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 646f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reset the adapter, ensures the driver is in sync with the RXP */ 647f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_reset(c2_port); 648f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 649f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reset the READY bit in the sk_buff RXP headers & adapter HRXDQ */ 650f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0, elem = c2_port->rx_ring.start; i < c2_port->rx_ring.count; 651f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker i++, elem++) { 652f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data; 653f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr->flags = 0; 654dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(RXP_HRXD_READY), 655f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_FLAGS); 656f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 657f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 658f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enable network packets */ 659f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_start_queue(netdev); 660f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 661f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enable IRQ */ 662f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(0, c2dev->regs + C2_IDIS); 663f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netimr0 = readl(c2dev->regs + C2_NIMR0); 664f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netimr0 &= ~(C2_PCI_HTX_INT | C2_PCI_HRX_INT); 665f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(netimr0, c2dev->regs + C2_NIMR0); 666f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 667f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell the stack to ignore arp requests for ipaddrs bound to 668f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * other interfaces. This is needed to prevent the host stack 669f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * from responding to arp requests to the ipaddr bound on the 670f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * rdma interface. 671f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 672f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker in_dev = in_dev_get(netdev); 67342f811b8bcdf6695bf74de580b1daf53445e8949Herbert Xu IN_DEV_CONF_SET(in_dev, ARP_IGNORE, 1); 674f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker in_dev_put(in_dev); 675f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 676f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 677f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 678f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail1: 679f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_clean(c2_port); 680f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kfree(c2_port->rx_ring.start); 681f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 682f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail0: 683f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem, 684f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->dma); 685f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 686f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 687f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 688f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 689f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_down(struct net_device *netdev) 690f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 691f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 692f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 693f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 694f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_ifdown(c2_port)) 695f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: disabling interface\n", 696f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name); 697f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 698f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Wait for all the queued packets to get sent */ 699f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_interrupt(netdev); 700f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 701f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable network packets */ 702f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 703f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 704f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable IRQs by clearing the interrupt mask */ 705f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(1, c2dev->regs + C2_IDIS); 706f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(0, c2dev->regs + C2_NIMR0); 707f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 708f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Stop transmitter */ 709f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 710f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Stop receiver */ 711f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 712f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reset the adapter, ensures the driver is in sync with the RXP */ 713f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_reset(c2_port); 714f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 715f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Turn off LEDs here */ 716f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 717f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free all buffers in the host descriptor rings */ 718f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_clean(c2_port); 719f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_clean(c2_port); 720f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 721f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free the host descriptor rings */ 722f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kfree(c2_port->rx_ring.start); 723f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kfree(c2_port->tx_ring.start); 724f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem, 725f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->dma); 726f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 727f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 728f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 729f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 730f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_reset(struct c2_port *c2_port) 731f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 732f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 733f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned int cur_rx = c2dev->cur_rx; 734f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 735f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell the hardware to quiesce */ 736f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_SET_CUR_RX(c2dev, cur_rx | C2_PCI_HRX_QUI); 737f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 738f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* 739f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * The hardware will reset the C2_PCI_HRX_QUI bit once 740f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * the RXP is quiesced. Wait 2 seconds for this. 741f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 742f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ssleep(2); 743f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 744f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker cur_rx = C2_GET_CUR_RX(c2dev); 745f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 746f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (cur_rx & C2_PCI_HRX_QUI) 747f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("c2_reset: failed to quiesce the hardware!\n"); 748f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 749f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker cur_rx &= ~C2_PCI_HRX_QUI; 750f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 751f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->cur_rx = cur_rx; 752f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 753f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Current RX: %u\n", c2dev->cur_rx); 754f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 755f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 756f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 757f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 758f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 759f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 760f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *tx_ring = &c2_port->tx_ring; 761f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 762f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t mapaddr; 763f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker u32 maplen; 764f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long flags; 765f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned int i; 766f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 767f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_irqsave(&c2_port->tx_lock, flags); 768f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 769f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (unlikely(c2_port->tx_avail < (skb_shinfo(skb)->nr_frags + 1))) { 770f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 771f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock_irqrestore(&c2_port->tx_lock, flags); 772f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 773f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: Tx ring full when queue awake!\n", 774f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name); 775f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NETDEV_TX_BUSY; 776f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 777f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 778f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker maplen = skb_headlen(skb); 779f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mapaddr = 780f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_map_single(c2dev->pcidev, skb->data, maplen, PCI_DMA_TODEVICE); 781f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 782f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = tx_ring->to_use; 783f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = skb; 784f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->mapaddr = mapaddr; 785f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen = maplen; 786f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 787f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell HW to xmit */ 788dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(mapaddr), 789dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier elem->hw_desc + C2_TXP_ADDR); 790dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(maplen), 791dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier elem->hw_desc + C2_TXP_LEN); 792dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_READY), 793dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier elem->hw_desc + C2_TXP_FLAGS); 794f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 795687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger netdev->stats.tx_packets++; 796687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger netdev->stats.tx_bytes += maplen; 797f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 798f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Loop thru additional data fragments and queue them */ 799f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (skb_shinfo(skb)->nr_frags) { 800f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 8019e903e085262ffbf1fc44a17ac06058aca03524aEric Dumazet const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 8029e903e085262ffbf1fc44a17ac06058aca03524aEric Dumazet maplen = skb_frag_size(frag); 80370b1052ad284d97d0a4d7f56ad63d1757f1da08fIan Campbell mapaddr = skb_frag_dma_map(&c2dev->pcidev->dev, frag, 8045d6bcdfe38ce883946aebf751a64695471ce1ab5Ian Campbell 0, maplen, DMA_TO_DEVICE); 805f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = elem->next; 806f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 807f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->mapaddr = mapaddr; 808f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen = maplen; 809f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 810f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell HW to xmit */ 811dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writeq((__force u64) cpu_to_be64(mapaddr), 812f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_ADDR); 813dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(maplen), 814f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_LEN); 815dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier __raw_writew((__force u16) cpu_to_be16(TXP_HTXD_READY), 816f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_FLAGS); 817f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 818687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger netdev->stats.tx_packets++; 819687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger netdev->stats.tx_bytes += maplen; 820f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 821f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 822f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 823f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->to_use = elem->next; 824f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_avail -= (skb_shinfo(skb)->nr_frags + 1); 825f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 826f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_port->tx_avail <= MAX_SKB_FRAGS + 1) { 827f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 828f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_tx_queued(c2_port)) 829f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: transmit queue full\n", 830f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name); 831f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 832f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 833f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock_irqrestore(&c2_port->tx_lock, flags); 834f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 835f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->trans_start = jiffies; 836f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 837f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NETDEV_TX_OK; 838f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 839f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 840f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_timeout(struct net_device *netdev) 841f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 842f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 843f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 844f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_timer(c2_port)) 845f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: tx timeout\n", netdev->name); 846f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 847f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_clean(c2_port); 848f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 849f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 850f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_change_mtu(struct net_device *netdev, int new_mtu) 851f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 852f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int ret = 0; 853f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 854f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU) 855f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -EINVAL; 856f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 857f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->mtu = new_mtu; 858f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 859f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_running(netdev)) { 860f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_down(netdev); 861f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 862f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_up(netdev); 863f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 864f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 865f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 866f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 867f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 868687c75dcf342f71329bd193af553e96a29581238Stephen Hemmingerstatic const struct net_device_ops c2_netdev = { 869687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger .ndo_open = c2_up, 870687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger .ndo_stop = c2_down, 871687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger .ndo_start_xmit = c2_xmit_frame, 872687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger .ndo_tx_timeout = c2_tx_timeout, 873687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger .ndo_change_mtu = c2_change_mtu, 874687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger .ndo_set_mac_address = eth_mac_addr, 875687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger .ndo_validate_addr = eth_validate_addr, 876687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger}; 877687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger 878f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Initialize network device */ 879f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct net_device *c2_devinit(struct c2_dev *c2dev, 880f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker void __iomem * mmio_addr) 881f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 882f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = NULL; 883f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = alloc_etherdev(sizeof(*c2_port)); 884f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 885f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!netdev) { 886f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("c2_port etherdev alloc failed"); 887f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NULL; 888f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 889f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 890f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker SET_NETDEV_DEV(netdev, &c2dev->pcidev->dev); 891f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 892687c75dcf342f71329bd193af553e96a29581238Stephen Hemminger netdev->netdev_ops = &c2_netdev; 893f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->watchdog_timeo = C2_TX_TIMEOUT; 894f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->irq = c2dev->pcidev->irq; 895f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 896f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port = netdev_priv(netdev); 897f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netdev = netdev; 898f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->c2dev = c2dev; 899f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->msg_enable = netif_msg_init(debug, default_msg); 900f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_ring.count = C2_NUM_TX_DESC; 901f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->rx_ring.count = C2_NUM_RX_DESC; 902f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 903f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_init(&c2_port->tx_lock); 904f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 905f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Copy our 48-bit ethernet hardware address */ 906f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker memcpy_fromio(netdev->dev_addr, mmio_addr + C2_REGS_ENADDR, 6); 907f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 908f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate the MAC address */ 909f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!is_valid_ether_addr(netdev->dev_addr)) { 910f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Invalid MAC Address\n"); 911f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_print_macaddr(netdev); 912f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_netdev(netdev); 913f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NULL; 914f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 915f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 916f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->netdev = netdev; 917f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 918f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return netdev; 919f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 920f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 9211e6d9abea73128cff1160624a8986570c48a095bGreg Kroah-Hartmanstatic int c2_probe(struct pci_dev *pcidev, const struct pci_device_id *ent) 922f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 923f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int ret = 0, i; 924f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long reg0_start, reg0_flags, reg0_len; 925f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long reg2_start, reg2_flags, reg2_len; 926f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long reg4_start, reg4_flags, reg4_len; 927f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned kva_map_size; 928f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = NULL; 929f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = NULL; 930f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker void __iomem *mmio_regs = NULL; 931f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 932f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_INFO PFX "AMSO1100 Gigabit Ethernet driver v%s loaded\n", 933f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker DRV_VERSION); 934f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 935f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enable PCI device */ 936f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = pci_enable_device(pcidev); 937f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 938f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: Unable to enable PCI device\n", 939f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev)); 940f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail0; 941f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 942f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 943f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg0_start = pci_resource_start(pcidev, BAR_0); 944f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg0_len = pci_resource_len(pcidev, BAR_0); 945f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg0_flags = pci_resource_flags(pcidev, BAR_0); 946f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 947f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg2_start = pci_resource_start(pcidev, BAR_2); 948f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg2_len = pci_resource_len(pcidev, BAR_2); 949f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg2_flags = pci_resource_flags(pcidev, BAR_2); 950f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 951f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg4_start = pci_resource_start(pcidev, BAR_4); 952f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg4_len = pci_resource_len(pcidev, BAR_4); 953f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg4_flags = pci_resource_flags(pcidev, BAR_4); 954f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 955f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAR0 size = 0x%lX bytes\n", reg0_len); 956f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAR2 size = 0x%lX bytes\n", reg2_len); 957f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAR4 size = 0x%lX bytes\n", reg4_len); 958f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 959f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Make sure PCI base addr are MMIO */ 960f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!(reg0_flags & IORESOURCE_MEM) || 961f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker !(reg2_flags & IORESOURCE_MEM) || !(reg4_flags & IORESOURCE_MEM)) { 962f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "PCI regions not an MMIO resource\n"); 963f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -ENODEV; 964f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 965f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 966f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 967f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Check for weird/broken PCI region reporting */ 968f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((reg0_len < C2_REG0_SIZE) || 969f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (reg2_len < C2_REG2_SIZE) || (reg4_len < C2_REG4_SIZE)) { 970f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Invalid PCI region sizes\n"); 971f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -ENODEV; 972f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 973f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 974f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 975f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reserve PCI I/O and memory resources */ 976f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = pci_request_regions(pcidev, DRV_NAME); 977f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 978f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: Unable to request regions\n", 979f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev)); 980f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 981f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 982f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 983f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((sizeof(dma_addr_t) > 4)) { 9846a35528a8346f6e6fd32ed7e51f04d1fa4ca2c01Yang Hongyang ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(64)); 985f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret < 0) { 986f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "64b DMA configuration failed\n"); 987f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 988f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 989f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 990284901a90a9e0b812ca3f5f852cbbfb60d10249dYang Hongyang ret = pci_set_dma_mask(pcidev, DMA_BIT_MASK(32)); 991f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret < 0) { 992f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "32b DMA configuration failed\n"); 993f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 994f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 995f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 996f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 997f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enables bus-mastering on the device */ 998f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_set_master(pcidev); 999f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1000f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the adapter PCI registers in BAR4 */ 1001f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mmio_regs = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET, 1002f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker sizeof(struct c2_adapter_pci_regs)); 10034b29043921ef021443c5e0d055b7b8dd5df88258Roland Dreier if (!mmio_regs) { 1004f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX 1005f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "Unable to remap adapter PCI registers in BAR4\n"); 1006f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1007f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1008f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1009f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1010f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate PCI regs magic */ 1011f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < sizeof(c2_magic); i++) { 1012f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_magic[i] != readb(mmio_regs + C2_REGS_MAGIC + i)) { 1013f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Downlevel Firmware boot loader " 1014f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "[%d/%Zd: got 0x%x, exp 0x%x]. Use the cc_flash " 1015f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "utility to update your boot loader\n", 1016f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker i + 1, sizeof(c2_magic), 1017f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker readb(mmio_regs + C2_REGS_MAGIC + i), 1018f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_magic[i]); 1019f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Adapter not claimed\n"); 1020f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1021f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1022f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1023f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1024f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1025f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1026f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate the adapter version */ 1027dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier if (be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_VERS)) != C2_VERSION) { 1028f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Version mismatch " 1029f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "[fw=%u, c2=%u], Adapter not claimed\n", 1030dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_VERS)), 1031f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_VERSION); 1032f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EINVAL; 1033f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1034f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1035f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1036f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1037f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate the adapter IVN */ 1038dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier if (be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_IVN)) != C2_IVN) { 1039f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Downlevel FIrmware level. You should be using " 1040f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "the OpenIB device support kit. " 1041f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "[fw=0x%x, c2=0x%x], Adapter not claimed\n", 1042dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_IVN)), 1043dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier C2_IVN); 1044f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EINVAL; 1045f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1046f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1047f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1048f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1049f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Allocate hardware structure */ 1050f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev = (struct c2_dev *) ib_alloc_device(sizeof(*c2dev)); 1051f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!c2dev) { 1052f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n", 1053f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev)); 1054f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -ENOMEM; 1055f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1056f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1057f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1058f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1059f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker memset(c2dev, 0, sizeof(*c2dev)); 1060f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_init(&c2dev->lock); 1061f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->pcidev = pcidev; 1062f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->cur_tx = 0; 1063f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1064f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Get the last RX index */ 1065f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->cur_rx = 1066dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier (be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_HRX_CUR)) - 1067f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 0xffffc000) / sizeof(struct c2_rxp_desc); 1068f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1069f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Request an interrupt line for the driver */ 107038515e908ba3a9c467ad3bf347b9bce69216df94Thomas Gleixner ret = request_irq(pcidev->irq, c2_interrupt, IRQF_SHARED, DRV_NAME, c2dev); 1071f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 1072f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n", 1073f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev), pcidev->irq); 1074f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1075f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail3; 1076f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1077f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1078f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set driver specific data */ 1079f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_set_drvdata(pcidev, c2dev); 1080f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1081f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Initialize network device */ 1082f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((netdev = c2_devinit(c2dev, mmio_regs)) == NULL) { 1083ab576627c8f97c08297d81537be17df161171923Julia Lawall ret = -ENOMEM; 1084f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1085f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail4; 1086f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1087f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1088f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Save off the actual size prior to unmapping mmio_regs */ 1089dc544bc9cb8aa91c5d7fc9116a302f88a8a97250Roland Dreier kva_map_size = be32_to_cpu((__force __be32) readl(mmio_regs + C2_REGS_PCI_WINSIZE)); 1090f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1091f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unmap the adapter PCI registers in BAR4 */ 1092f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1093f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1094f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Register network device */ 1095f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = register_netdev(netdev); 1096f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 1097f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", 1098f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret); 1099f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail5; 1100f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1101f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1102f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable network packets */ 1103f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 1104f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1105f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the adapter HRXDQ PA space to kernel VA space */ 1106f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_rxp_ring = ioremap_nocache(reg4_start + C2_RXP_HRXDQ_OFFSET, 1107f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_RXP_HRXDQ_SIZE); 11084b29043921ef021443c5e0d055b7b8dd5df88258Roland Dreier if (!c2dev->mmio_rxp_ring) { 1109f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap MMIO HRXDQ region\n"); 1110f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1111f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail6; 1112f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1113f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1114f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the adapter HTXDQ PA space to kernel VA space */ 1115f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_txp_ring = ioremap_nocache(reg4_start + C2_TXP_HTXDQ_OFFSET, 1116f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_TXP_HTXDQ_SIZE); 11174b29043921ef021443c5e0d055b7b8dd5df88258Roland Dreier if (!c2dev->mmio_txp_ring) { 1118f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap MMIO HTXDQ region\n"); 1119f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1120f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail7; 1121f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1122f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1123f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Save off the current RX index in the last 4 bytes of the TXP Ring */ 1124f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_SET_CUR_RX(c2dev, c2dev->cur_rx); 1125f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1126f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the PCI registers in adapter BAR0 to kernel VA space */ 1127f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->regs = ioremap_nocache(reg0_start, reg0_len); 11284b29043921ef021443c5e0d055b7b8dd5df88258Roland Dreier if (!c2dev->regs) { 1129f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap BAR0\n"); 1130f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1131f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail8; 1132f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1133f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1134f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the PCI registers in adapter BAR4 to kernel VA space */ 1135f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->pa = reg4_start + C2_PCI_REGS_OFFSET; 1136f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->kva = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET, 1137f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kva_map_size); 11384b29043921ef021443c5e0d055b7b8dd5df88258Roland Dreier if (!c2dev->kva) { 1139f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap BAR4\n"); 1140f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1141f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail9; 1142f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1143f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1144f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Print out the MAC address */ 1145f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_print_macaddr(netdev); 1146f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1147f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = c2_rnic_init(c2dev); 1148f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 1149f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "c2_rnic_init failed: %d\n", ret); 1150f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail10; 1151f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1152f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1153ab576627c8f97c08297d81537be17df161171923Julia Lawall ret = c2_register_device(c2dev); 1154ab576627c8f97c08297d81537be17df161171923Julia Lawall if (ret) 11552ffcab6ae44b02679229ca1852526d0a6e062dd2Tom Tucker goto bail10; 1156f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1157f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 1158f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1159f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail10: 1160f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->kva); 1161f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1162f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail9: 1163f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->regs); 1164f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1165f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail8: 1166f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_txp_ring); 1167f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1168f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail7: 1169f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_rxp_ring); 1170f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1171f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail6: 1172f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unregister_netdev(netdev); 1173f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1174f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail5: 1175f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_netdev(netdev); 1176f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1177f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail4: 1178f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_irq(pcidev->irq, c2dev); 1179f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1180f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail3: 1181f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ib_dealloc_device(&c2dev->ibdev); 1182f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1183f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail2: 1184f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_release_regions(pcidev); 1185f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1186f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail1: 1187f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_disable_device(pcidev); 1188f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1189f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail0: 1190f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 1191f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 1192f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 11931e6d9abea73128cff1160624a8986570c48a095bGreg Kroah-Hartmanstatic void c2_remove(struct pci_dev *pcidev) 1194f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 1195f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = pci_get_drvdata(pcidev); 1196f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = c2dev->netdev; 1197f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1198f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unregister with OpenIB */ 1199f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_unregister_device(c2dev); 1200f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1201f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Clean up the RNIC resources */ 1202f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rnic_term(c2dev); 1203f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1204f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remove network device from the kernel */ 1205f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unregister_netdev(netdev); 1206f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1207f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free network device */ 1208f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_netdev(netdev); 1209f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1210f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free the interrupt line */ 1211f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_irq(pcidev->irq, c2dev); 1212f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1213f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Turn LEDs off here */ 1214f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1215f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unmap adapter PA space */ 1216f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->kva); 1217f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->regs); 1218f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_txp_ring); 1219f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_rxp_ring); 1220f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1221f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free the hardware structure */ 1222f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ib_dealloc_device(&c2dev->ibdev); 1223f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1224f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Release reserved PCI I/O and memory resources */ 1225f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_release_regions(pcidev); 1226f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1227f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable PCI device */ 1228f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_disable_device(pcidev); 1229f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1230f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Clear driver specific data */ 1231f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_set_drvdata(pcidev, NULL); 1232f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 1233f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1234f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct pci_driver c2_pci_driver = { 1235f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker .name = DRV_NAME, 1236f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker .id_table = c2_pci_table, 1237f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker .probe = c2_probe, 12381e6d9abea73128cff1160624a8986570c48a095bGreg Kroah-Hartman .remove = c2_remove, 1239f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker}; 1240f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 12418ab10f75372fc59b95d96af40b9a3b4c2a0da059Wei Yongjunmodule_pci_driver(c2_pci_driver); 1242