c2.c revision d986a27413aad10574f7211524de6a529870d134
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> 39f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/delay.h> 40f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/ethtool.h> 41f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/mii.h> 42f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/if_vlan.h> 43f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/crc32.h> 44f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/in.h> 45f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/ip.h> 46f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/tcp.h> 47f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/init.h> 48f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <linux/dma-mapping.h> 49f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 50f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <asm/io.h> 51f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <asm/irq.h> 52f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <asm/byteorder.h> 53f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 54f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include <rdma/ib_smi.h> 55f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include "c2.h" 56f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker#include "c2_provider.h" 57f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 58f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_AUTHOR("Tom Tucker <tom@opengridcomputing.com>"); 59f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_DESCRIPTION("Ammasso AMSO1100 Low-level iWARP Driver"); 60f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_LICENSE("Dual BSD/GPL"); 61f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_VERSION(DRV_VERSION); 62f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 63f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK 64f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN; 65f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 66f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int debug = -1; /* defaults above */ 67f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckermodule_param(debug, int, 0); 68f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); 69f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 70f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_up(struct net_device *netdev); 71f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_down(struct net_device *netdev); 72f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev); 73f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_interrupt(struct net_device *netdev); 74f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_interrupt(struct net_device *netdev); 757d12e780e003f93433d49ce78cfedf4b4c52adc5David Howellsstatic irqreturn_t c2_interrupt(int irq, void *dev_id); 76f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_timeout(struct net_device *netdev); 77f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_change_mtu(struct net_device *netdev, int new_mtu); 78f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_reset(struct c2_port *c2_port); 79f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct net_device_stats *c2_get_stats(struct net_device *netdev); 80f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 81f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct pci_device_id c2_pci_table[] = { 82f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker { PCI_DEVICE(0x18b8, 0xb001) }, 83f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker { 0 } 84f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker}; 85f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 86f94b533d091a42da92d908eb7b3f9ade1923f90dTom TuckerMODULE_DEVICE_TABLE(pci, c2_pci_table); 87f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 88f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_print_macaddr(struct net_device *netdev) 89f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 90f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: MAC %02X:%02X:%02X:%02X:%02X:%02X, " 91f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "IRQ %u\n", netdev->name, 92f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2], 93f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5], 94f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->irq); 95f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 96f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 97f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_set_rxbufsize(struct c2_port *c2_port) 98f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 99f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = c2_port->netdev; 100f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 101f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netdev->mtu > RX_BUF_SIZE) 102f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->rx_buf_size = 103f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->mtu + ETH_HLEN + sizeof(struct c2_rxp_hdr) + 104f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker NET_IP_ALIGN; 105f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker else 106f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->rx_buf_size = sizeof(struct c2_rxp_hdr) + RX_BUF_SIZE; 107f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 108f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 109f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 110f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate TX ring elements and chain them together. 111f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * One-to-one association of adapter descriptors with ring elements. 112f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 113f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_tx_ring_alloc(struct c2_ring *tx_ring, void *vaddr, 114f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t base, void __iomem * mmio_txp_ring) 115f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 116f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_tx_desc *tx_desc; 117f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_txp_desc __iomem *txp_desc; 118f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 119f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int i; 120f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 121f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->start = kmalloc(sizeof(*elem) * tx_ring->count, GFP_KERNEL); 122f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!tx_ring->start) 123f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -ENOMEM; 124f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 125f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = tx_ring->start; 126f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc = vaddr; 127f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_desc = mmio_txp_ring; 128f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < tx_ring->count; i++, elem++, tx_desc++, txp_desc++) { 129f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->len = 0; 130f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->status = 0; 131f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 132f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set TXP_HTXD_UNINIT */ 133f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(0x1122334455667788ULL), 134f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) txp_desc + C2_TXP_ADDR); 135f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, (void __iomem *) txp_desc + C2_TXP_LEN); 136f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(TXP_HTXD_UNINIT), 137f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) txp_desc + C2_TXP_FLAGS); 138f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 139f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 140f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->ht_desc = tx_desc; 141f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc = txp_desc; 142f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 143f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (i == tx_ring->count - 1) { 144f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = tx_ring->start; 145f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->next_offset = base; 146f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 147f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = elem + 1; 148f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->next_offset = 149f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker base + (i + 1) * sizeof(*tx_desc); 150f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 151f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 152f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 153f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->to_use = tx_ring->to_clean = tx_ring->start; 154f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 155f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 156f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 157f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 158f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 159f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate RX ring elements and chain them together. 160f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * One-to-one association of adapter descriptors with ring elements. 161f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 162f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_rx_ring_alloc(struct c2_ring *rx_ring, void *vaddr, 163f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t base, void __iomem * mmio_rxp_ring) 164f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 165f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc; 166f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_desc __iomem *rxp_desc; 167f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 168f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int i; 169f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 170f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->start = kmalloc(sizeof(*elem) * rx_ring->count, GFP_KERNEL); 171f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!rx_ring->start) 172f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -ENOMEM; 173f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 174f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = rx_ring->start; 175f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc = vaddr; 176f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_desc = mmio_rxp_ring; 177f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < rx_ring->count; i++, elem++, rx_desc++, rxp_desc++) { 178f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->len = 0; 179f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->status = 0; 180f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 181f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set RXP_HRXD_UNINIT */ 182f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(RXP_HRXD_OK), 183f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) rxp_desc + C2_RXP_STATUS); 184f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_COUNT); 185f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, (void __iomem *) rxp_desc + C2_RXP_LEN); 186f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(0x99aabbccddeeffULL), 187f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) rxp_desc + C2_RXP_ADDR); 188f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(RXP_HRXD_UNINIT), 189f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void __iomem *) rxp_desc + C2_RXP_FLAGS); 190f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 191f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 192f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->ht_desc = rx_desc; 193f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc = rxp_desc; 194f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 195f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (i == rx_ring->count - 1) { 196f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = rx_ring->start; 197f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->next_offset = base; 198f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 199f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->next = elem + 1; 200f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->next_offset = 201f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker base + (i + 1) * sizeof(*rx_desc); 202f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 203f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 204f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 205f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->to_use = rx_ring->to_clean = rx_ring->start; 206f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 207f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 208f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 209f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 210f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Setup buffer for receiving */ 211f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic inline int c2_rx_alloc(struct c2_port *c2_port, struct c2_element *elem) 212f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 213f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 214f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc = elem->ht_desc; 215f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct sk_buff *skb; 216f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t mapaddr; 217f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker u32 maplen; 218f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_hdr *rxp_hdr; 219f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 220f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb = dev_alloc_skb(c2_port->rx_buf_size); 221f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (unlikely(!skb)) { 222f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: out of memory for receive\n", 223f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netdev->name); 224f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -ENOMEM; 225f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 226f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 227f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Zero out the rxp hdr in the sk_buff */ 228f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker memset(skb->data, 0, sizeof(*rxp_hdr)); 229f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 230f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->dev = c2_port->netdev; 231f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 232f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker maplen = c2_port->rx_buf_size; 233f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mapaddr = 234f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_map_single(c2dev->pcidev, skb->data, maplen, 235f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker PCI_DMA_FROMDEVICE); 236f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 237f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set the sk_buff RXP_header to RXP_HRXD_READY */ 238f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr = (struct c2_rxp_hdr *) skb->data; 239f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr->flags = RXP_HRXD_READY; 240f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 241f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); 242f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16((u16) maplen - sizeof(*rxp_hdr)), 243f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_LEN); 244f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(mapaddr), elem->hw_desc + C2_RXP_ADDR); 245f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(RXP_HRXD_READY), elem->hw_desc + C2_RXP_FLAGS); 246f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 247f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = skb; 248f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->mapaddr = mapaddr; 249f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen = maplen; 250f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->len = maplen; 251f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 252f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 253f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 254f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 255f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 256f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate buffers for the Rx ring 257f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * For receive: rx_ring.to_clean is next received frame 258f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 259f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_rx_fill(struct c2_port *c2_port) 260f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 261f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *rx_ring = &c2_port->rx_ring; 262f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 263f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int ret = 0; 264f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 265f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = rx_ring->start; 266f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 267f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_rx_alloc(c2_port, elem)) { 268f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = 1; 269f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 270f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 271f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while ((elem = elem->next) != rx_ring->start); 272f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 273f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->to_clean = rx_ring->start; 274f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 275f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 276f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 277f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Free all buffers in RX ring, assumes receiver stopped */ 278f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_clean(struct c2_port *c2_port) 279f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 280f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 281f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *rx_ring = &c2_port->rx_ring; 282f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 283f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc; 284f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 285f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = rx_ring->start; 286f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 287f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc = elem->ht_desc; 288f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc->len = 0; 289f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 290f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_STATUS); 291f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_COUNT); 292f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, elem->hw_desc + C2_RXP_LEN); 293f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(0x99aabbccddeeffULL), 294f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_ADDR); 295f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(RXP_HRXD_UNINIT), 296f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_FLAGS); 297f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 298f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (elem->skb) { 299f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_unmap_single(c2dev->pcidev, elem->mapaddr, 300f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen, PCI_DMA_FROMDEVICE); 301f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dev_kfree_skb(elem->skb); 302f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 303f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 304f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while ((elem = elem->next) != rx_ring->start); 305f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 306f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 307f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic inline int c2_tx_free(struct c2_dev *c2dev, struct c2_element *elem) 308f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 309f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_tx_desc *tx_desc = elem->ht_desc; 310f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 311f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_desc->len = 0; 312f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 313f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_unmap_single(c2dev->pcidev, elem->mapaddr, elem->maplen, 314f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker PCI_DMA_TODEVICE); 315f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 316f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (elem->skb) { 317f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dev_kfree_skb_any(elem->skb); 318f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 319f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 320f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 321f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 322f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 323f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 324f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Free all buffers in TX ring, assumes transmitter stopped */ 325f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_clean(struct c2_port *c2_port) 326f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 327f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *tx_ring = &c2_port->tx_ring; 328f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 329f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_txp_desc txp_htxd; 330f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int retry; 331f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long flags; 332f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 333f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_irqsave(&c2_port->tx_lock, flags); 334f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 335f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = tx_ring->start; 336f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 337f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 338f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker retry = 0; 339f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker do { 340f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.flags = 341f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker readw(elem->hw_desc + C2_TXP_FLAGS); 342f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 343f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (txp_htxd.flags == TXP_HTXD_READY) { 344f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker retry = 1; 345f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, 346f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_LEN); 347f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(0, 348f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_ADDR); 349f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(TXP_HTXD_DONE), 350f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_FLAGS); 351f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.tx_dropped++; 352f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 353f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 354f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(0, 355f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_LEN); 356f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(0x1122334455667788ULL), 357f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_ADDR); 358f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(TXP_HTXD_UNINIT), 359f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_FLAGS); 360f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 361f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 362f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_free(c2_port->c2dev, elem); 363f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 364f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while ((elem = elem->next) != tx_ring->start); 365f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } while (retry); 366f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 367f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_avail = c2_port->tx_ring.count - 1; 368f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->c2dev->cur_tx = tx_ring->to_use - tx_ring->start; 369f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 370f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_port->tx_avail > MAX_SKB_FRAGS + 1) 371f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_wake_queue(c2_port->netdev); 372f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 373f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock_irqrestore(&c2_port->tx_lock, flags); 374f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 375f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 376f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* 377f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Process transmit descriptors marked 'DONE' by the firmware, 378f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * freeing up their unneeded sk_buffs. 379f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 380f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_interrupt(struct net_device *netdev) 381f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 382f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 383f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 384f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *tx_ring = &c2_port->tx_ring; 385f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 386f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_txp_desc txp_htxd; 387f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 388f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock(&c2_port->tx_lock); 389f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 390f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (elem = tx_ring->to_clean; elem != tx_ring->to_use; 391f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = elem->next) { 392f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.flags = 393f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker be16_to_cpu(readw(elem->hw_desc + C2_TXP_FLAGS)); 394f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 395f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (txp_htxd.flags != TXP_HTXD_DONE) 396f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 397f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 398f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_tx_done(c2_port)) { 399f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* PCI reads are expensive in fast path */ 400f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.len = 401f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker be16_to_cpu(readw(elem->hw_desc + C2_TXP_LEN)); 402f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: tx done slot %3Zu status 0x%x len " 403f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "%5u bytes\n", 404f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name, elem - tx_ring->start, 405f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker txp_htxd.flags, txp_htxd.len); 406f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 407f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 408f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_free(c2dev, elem); 409f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ++(c2_port->tx_avail); 410f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 411f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 412f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->to_clean = elem; 413f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 414f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_queue_stopped(netdev) 415f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker && c2_port->tx_avail > MAX_SKB_FRAGS + 1) 416f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_wake_queue(netdev); 417f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 418f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock(&c2_port->tx_lock); 419f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 420f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 421f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_error(struct c2_port *c2_port, struct c2_element *elem) 422f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 423f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc = elem->ht_desc; 424f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_hdr *rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data; 425f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 426f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (rxp_hdr->status != RXP_HRXD_OK || 427f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr->len > (rx_desc->len - sizeof(*rxp_hdr))) { 428f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAD RXP_HRXD\n"); 429f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" rx_desc : %p\n", rx_desc); 430f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" index : %Zu\n", 431f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem - c2_port->rx_ring.start); 432f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" len : %u\n", rx_desc->len); 433f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" rxp_hdr : %p [PA %p]\n", rxp_hdr, 434f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (void *) __pa((unsigned long) rxp_hdr)); 435f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" flags : 0x%x\n", rxp_hdr->flags); 436f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" status: 0x%x\n", rxp_hdr->status); 437f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" len : %u\n", rxp_hdr->len); 438f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug(" rsvd : 0x%x\n", rxp_hdr->rsvd); 439f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 440f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 441f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Setup the skb for reuse since we're dropping this pkt */ 442f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb->tail = elem->skb->data = elem->skb->head; 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); 450f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16((u16) elem->maplen - sizeof(*rxp_hdr)), 451f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_LEN); 452f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(elem->mapaddr), elem->hw_desc + C2_RXP_ADDR); 453f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(RXP_HRXD_READY), elem->hw_desc + C2_RXP_FLAGS); 454f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 455f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("packet dropped\n"); 456f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.rx_dropped++; 457f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 458f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 459f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_rx_interrupt(struct net_device *netdev) 460f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 461f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 462f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 463f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *rx_ring = &c2_port->rx_ring; 464f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 465f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rx_desc *rx_desc; 466f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_rxp_hdr *rxp_hdr; 467f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct sk_buff *skb; 468f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t mapaddr; 469f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker u32 maplen, buflen; 470f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long flags; 471f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 472f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_irqsave(&c2dev->lock, flags); 473f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 474f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Begin where we left off */ 475f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_ring->to_clean = rx_ring->start + c2dev->cur_rx; 476f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 477f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (elem = rx_ring->to_clean; elem->next != rx_ring->to_clean; 478f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = elem->next) { 479f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rx_desc = elem->ht_desc; 480f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mapaddr = elem->mapaddr; 481f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker maplen = elem->maplen; 482f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb = elem->skb; 483f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr = (struct c2_rxp_hdr *) skb->data; 484f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 485f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (rxp_hdr->flags != RXP_HRXD_DONE) 486f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker break; 487f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker buflen = rxp_hdr->len; 488f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 489f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Sanity check the RXP header */ 490f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (rxp_hdr->status != RXP_HRXD_OK || 491f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker buflen > (rx_desc->len - sizeof(*rxp_hdr))) { 492f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_error(c2_port, elem); 493f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker continue; 494f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 495f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 496f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* 497f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Allocate and map a new skb for replenishing the host 498f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * RX desc 499f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 500f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_rx_alloc(c2_port, elem)) { 501f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_error(c2_port, elem); 502f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker continue; 503f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 504f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 505f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unmap the old skb */ 506f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_unmap_single(c2dev->pcidev, mapaddr, maplen, 507f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker PCI_DMA_FROMDEVICE); 508f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 509f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker prefetch(skb->data); 510f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 511f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* 512f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Skip past the leading 8 bytes comprising of the 513f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * "struct c2_rxp_hdr", prepended by the adapter 514f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * to the usual Ethernet header ("struct ethhdr"), 515f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * to the start of the raw Ethernet packet. 516f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * 517f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * Fix up the various fields in the sk_buff before 518f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * passing it up to netif_rx(). The transfer size 519f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * (in bytes) specified by the adapter len field of 520f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * the "struct rxp_hdr_t" does NOT include the 521f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * "sizeof(struct c2_rxp_hdr)". 522f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 523f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->data += sizeof(*rxp_hdr); 524f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->tail = skb->data + buflen; 525f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->len = buflen; 526f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->dev = netdev; 527f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb->protocol = eth_type_trans(skb, netdev); 528f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 529f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_rx(skb); 530f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 531f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->last_rx = jiffies; 532f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.rx_packets++; 533f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.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; 607f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->mem = pci_alloc_consistent(c2dev->pcidev, c2_port->mem_size, 608f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker &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 memset(c2_port->mem, 0, c2_port->mem_size); 616f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 617f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Create the Rx host descriptor ring */ 618f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((ret = 619f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_ring_alloc(&c2_port->rx_ring, c2_port->mem, c2_port->dma, 620f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_rxp_ring))) { 621f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Unable to create RX ring\n"); 622f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail0; 623f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 624f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 625f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Allocate Rx buffers for the host descriptor ring */ 626f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_rx_fill(c2_port)) { 627f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Unable to fill RX ring\n"); 628f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 629f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 630f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 631f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Create the Tx host descriptor ring */ 632f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((ret = c2_tx_ring_alloc(&c2_port->tx_ring, c2_port->mem + rx_size, 633f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->dma + rx_size, 634f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_txp_ring))) { 635f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Unable to create TX ring\n"); 636f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 637f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 638f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 639f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set the TX pointer to where we left off */ 640f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_avail = c2_port->tx_ring.count - 1; 641f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_ring.to_use = c2_port->tx_ring.to_clean = 642f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_ring.start + c2dev->cur_tx; 643f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 644f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Initialize MAC */ 645f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 646f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker BUG_ON(c2_port->tx_ring.to_use != c2_port->tx_ring.to_clean); 647f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 648f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reset the adapter, ensures the driver is in sync with the RXP */ 649f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_reset(c2_port); 650f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 651f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reset the READY bit in the sk_buff RXP headers & adapter HRXDQ */ 652f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0, elem = c2_port->rx_ring.start; i < c2_port->rx_ring.count; 653f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker i++, elem++) { 654f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr = (struct c2_rxp_hdr *) elem->skb->data; 655f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker rxp_hdr->flags = 0; 656f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(RXP_HRXD_READY), 657f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_RXP_FLAGS); 658f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 659f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 660f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enable network packets */ 661f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_start_queue(netdev); 662f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 663f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enable IRQ */ 664f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(0, c2dev->regs + C2_IDIS); 665f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netimr0 = readl(c2dev->regs + C2_NIMR0); 666f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netimr0 &= ~(C2_PCI_HTX_INT | C2_PCI_HRX_INT); 667f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(netimr0, c2dev->regs + C2_NIMR0); 668f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 669f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell the stack to ignore arp requests for ipaddrs bound to 670f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * other interfaces. This is needed to prevent the host stack 671f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * from responding to arp requests to the ipaddr bound on the 672f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * rdma interface. 673f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 674f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker in_dev = in_dev_get(netdev); 675f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker in_dev->cnf.arp_ignore = 1; 676f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker in_dev_put(in_dev); 677f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 678f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 679f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 680f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail1: 681f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_clean(c2_port); 682f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kfree(c2_port->rx_ring.start); 683f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 684f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail0: 685f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem, 686f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->dma); 687f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 688f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 689f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 690f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 691f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_down(struct net_device *netdev) 692f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 693f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 694f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 695f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 696f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_ifdown(c2_port)) 697f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: disabling interface\n", 698f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name); 699f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 700f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Wait for all the queued packets to get sent */ 701f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_interrupt(netdev); 702f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 703f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable network packets */ 704f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 705f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 706f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable IRQs by clearing the interrupt mask */ 707f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(1, c2dev->regs + C2_IDIS); 708f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker writel(0, c2dev->regs + C2_NIMR0); 709f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 710f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Stop transmitter */ 711f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 712f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Stop receiver */ 713f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 714f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reset the adapter, ensures the driver is in sync with the RXP */ 715f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_reset(c2_port); 716f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 717f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Turn off LEDs here */ 718f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 719f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free all buffers in the host descriptor rings */ 720f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_clean(c2_port); 721f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rx_clean(c2_port); 722f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 723f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free the host descriptor rings */ 724f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kfree(c2_port->rx_ring.start); 725f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kfree(c2_port->tx_ring.start); 726f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_free_consistent(c2dev->pcidev, c2_port->mem_size, c2_port->mem, 727f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->dma); 728f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 729f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 730f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 731f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 732f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_reset(struct c2_port *c2_port) 733f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 734f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 735f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned int cur_rx = c2dev->cur_rx; 736f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 737f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell the hardware to quiesce */ 738f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_SET_CUR_RX(c2dev, cur_rx | C2_PCI_HRX_QUI); 739f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 740f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* 741f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * The hardware will reset the C2_PCI_HRX_QUI bit once 742f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker * the RXP is quiesced. Wait 2 seconds for this. 743f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker */ 744f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ssleep(2); 745f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 746f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker cur_rx = C2_GET_CUR_RX(c2dev); 747f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 748f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (cur_rx & C2_PCI_HRX_QUI) 749f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("c2_reset: failed to quiesce the hardware!\n"); 750f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 751f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker cur_rx &= ~C2_PCI_HRX_QUI; 752f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 753f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->cur_rx = cur_rx; 754f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 755f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Current RX: %u\n", c2dev->cur_rx); 756f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 757f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 758f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_xmit_frame(struct sk_buff *skb, struct net_device *netdev) 759f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 760f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 761f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = c2_port->c2dev; 762f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_ring *tx_ring = &c2_port->tx_ring; 763f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_element *elem; 764f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker dma_addr_t mapaddr; 765f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker u32 maplen; 766f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long flags; 767f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned int i; 768f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 769f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_irqsave(&c2_port->tx_lock, flags); 770f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 771f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (unlikely(c2_port->tx_avail < (skb_shinfo(skb)->nr_frags + 1))) { 772f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 773f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock_irqrestore(&c2_port->tx_lock, flags); 774f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 775f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: Tx ring full when queue awake!\n", 776f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name); 777f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NETDEV_TX_BUSY; 778f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 779f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 780f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker maplen = skb_headlen(skb); 781f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mapaddr = 782f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_map_single(c2dev->pcidev, skb->data, maplen, PCI_DMA_TODEVICE); 783f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 784f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = tx_ring->to_use; 785f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = skb; 786f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->mapaddr = mapaddr; 787f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen = maplen; 788f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 789f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell HW to xmit */ 790f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(mapaddr), elem->hw_desc + C2_TXP_ADDR); 791f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(maplen), elem->hw_desc + C2_TXP_LEN); 792f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(TXP_HTXD_READY), elem->hw_desc + C2_TXP_FLAGS); 793f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 794f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.tx_packets++; 795f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.tx_bytes += maplen; 796f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 797f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Loop thru additional data fragments and queue them */ 798f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (skb_shinfo(skb)->nr_frags) { 799f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 800f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 801f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker maplen = frag->size; 802f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mapaddr = 803f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_map_page(c2dev->pcidev, frag->page, 804f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker frag->page_offset, maplen, 805f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker PCI_DMA_TODEVICE); 806f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 807f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem = elem->next; 808f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->skb = NULL; 809f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->mapaddr = mapaddr; 810f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->maplen = maplen; 811f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 812f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Tell HW to xmit */ 813f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writeq(cpu_to_be64(mapaddr), 814f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_ADDR); 815f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(maplen), 816f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_LEN); 817f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker __raw_writew(cpu_to_be16(TXP_HTXD_READY), 818f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker elem->hw_desc + C2_TXP_FLAGS); 819f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 820f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.tx_packets++; 821f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netstats.tx_bytes += maplen; 822f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 823f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 824f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 825f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker tx_ring->to_use = elem->next; 826f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_avail -= (skb_shinfo(skb)->nr_frags + 1); 827f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 828f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_port->tx_avail <= MAX_SKB_FRAGS + 1) { 829f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 830f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_tx_queued(c2_port)) 831f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: transmit queue full\n", 832f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->name); 833f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 834f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 835f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_unlock_irqrestore(&c2_port->tx_lock, flags); 836f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 837f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->trans_start = jiffies; 838f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 839f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NETDEV_TX_OK; 840f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 841f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 842f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct net_device_stats *c2_get_stats(struct net_device *netdev) 843f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 844f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 845f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 846f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return &c2_port->netstats; 847f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 848f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 849f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void c2_tx_timeout(struct net_device *netdev) 850f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 851f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = netdev_priv(netdev); 852f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 853f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_msg_timer(c2_port)) 854f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("%s: tx timeout\n", netdev->name); 855f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 856f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_tx_clean(c2_port); 857f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 858f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 859f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int c2_change_mtu(struct net_device *netdev, int new_mtu) 860f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 861f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int ret = 0; 862f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 863f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU) 864f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return -EINVAL; 865f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 866f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->mtu = new_mtu; 867f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 868f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (netif_running(netdev)) { 869f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_down(netdev); 870f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 871f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_up(netdev); 872f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 873f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 874f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 875f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 876f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 877f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker/* Initialize network device */ 878f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct net_device *c2_devinit(struct c2_dev *c2dev, 879f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker void __iomem * mmio_addr) 880f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 881f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_port *c2_port = NULL; 882f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = alloc_etherdev(sizeof(*c2_port)); 883f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 884f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!netdev) { 885f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("c2_port etherdev alloc failed"); 886f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NULL; 887f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 888f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 889f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker SET_MODULE_OWNER(netdev); 890f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker SET_NETDEV_DEV(netdev, &c2dev->pcidev->dev); 891f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 892f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->open = c2_up; 893f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->stop = c2_down; 894f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->hard_start_xmit = c2_xmit_frame; 895f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->get_stats = c2_get_stats; 896f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->tx_timeout = c2_tx_timeout; 897f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->change_mtu = c2_change_mtu; 898f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->watchdog_timeo = C2_TX_TIMEOUT; 899f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netdev->irq = c2dev->pcidev->irq; 900f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 901f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port = netdev_priv(netdev); 902f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->netdev = netdev; 903f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->c2dev = c2dev; 904f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->msg_enable = netif_msg_init(debug, default_msg); 905f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->tx_ring.count = C2_NUM_TX_DESC; 906f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_port->rx_ring.count = C2_NUM_RX_DESC; 907f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 908f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_init(&c2_port->tx_lock); 909f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 910f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Copy our 48-bit ethernet hardware address */ 911f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker memcpy_fromio(netdev->dev_addr, mmio_addr + C2_REGS_ENADDR, 6); 912f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 913f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate the MAC address */ 914f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!is_valid_ether_addr(netdev->dev_addr)) { 915f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("Invalid MAC Address\n"); 916f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_print_macaddr(netdev); 917f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_netdev(netdev); 918f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return NULL; 919f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 920f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 921f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->netdev = netdev; 922f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 923f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return netdev; 924f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 925f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 926f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int __devinit c2_probe(struct pci_dev *pcidev, 927f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker const struct pci_device_id *ent) 928f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 929f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker int ret = 0, i; 930f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long reg0_start, reg0_flags, reg0_len; 931f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long reg2_start, reg2_flags, reg2_len; 932f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned long reg4_start, reg4_flags, reg4_len; 933f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unsigned kva_map_size; 934f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = NULL; 935f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = NULL; 936f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker void __iomem *mmio_regs = NULL; 937f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 938f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_INFO PFX "AMSO1100 Gigabit Ethernet driver v%s loaded\n", 939f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker DRV_VERSION); 940f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 941f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enable PCI device */ 942f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = pci_enable_device(pcidev); 943f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 944f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: Unable to enable PCI device\n", 945f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev)); 946f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail0; 947f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 948f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 949f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg0_start = pci_resource_start(pcidev, BAR_0); 950f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg0_len = pci_resource_len(pcidev, BAR_0); 951f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg0_flags = pci_resource_flags(pcidev, BAR_0); 952f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 953f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg2_start = pci_resource_start(pcidev, BAR_2); 954f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg2_len = pci_resource_len(pcidev, BAR_2); 955f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg2_flags = pci_resource_flags(pcidev, BAR_2); 956f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 957f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg4_start = pci_resource_start(pcidev, BAR_4); 958f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg4_len = pci_resource_len(pcidev, BAR_4); 959f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker reg4_flags = pci_resource_flags(pcidev, BAR_4); 960f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 961f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAR0 size = 0x%lX bytes\n", reg0_len); 962f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAR2 size = 0x%lX bytes\n", reg2_len); 963f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pr_debug("BAR4 size = 0x%lX bytes\n", reg4_len); 964f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 965f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Make sure PCI base addr are MMIO */ 966f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!(reg0_flags & IORESOURCE_MEM) || 967f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker !(reg2_flags & IORESOURCE_MEM) || !(reg4_flags & IORESOURCE_MEM)) { 968f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "PCI regions not an MMIO resource\n"); 969f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -ENODEV; 970f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 971f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 972f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 973f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Check for weird/broken PCI region reporting */ 974f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((reg0_len < C2_REG0_SIZE) || 975f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (reg2_len < C2_REG2_SIZE) || (reg4_len < C2_REG4_SIZE)) { 976f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Invalid PCI region sizes\n"); 977f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -ENODEV; 978f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 979f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 980f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 981f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Reserve PCI I/O and memory resources */ 982f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = pci_request_regions(pcidev, DRV_NAME); 983f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 984f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: Unable to request regions\n", 985f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev)); 986f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail1; 987f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 988f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 989f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((sizeof(dma_addr_t) > 4)) { 990f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = pci_set_dma_mask(pcidev, DMA_64BIT_MASK); 991f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret < 0) { 992f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "64b DMA configuration failed\n"); 993f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 994f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 995f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } else { 996f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = pci_set_dma_mask(pcidev, DMA_32BIT_MASK); 997f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret < 0) { 998f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "32b DMA configuration failed\n"); 999f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1000f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1001f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1002f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1003f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Enables bus-mastering on the device */ 1004f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_set_master(pcidev); 1005f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1006f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the adapter PCI registers in BAR4 */ 1007f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker mmio_regs = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET, 1008f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker sizeof(struct c2_adapter_pci_regs)); 1009f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (mmio_regs == 0UL) { 1010f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX 1011f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "Unable to remap adapter PCI registers in BAR4\n"); 1012f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1013f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1014f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1015f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1016f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate PCI regs magic */ 1017f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker for (i = 0; i < sizeof(c2_magic); i++) { 1018f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2_magic[i] != readb(mmio_regs + C2_REGS_MAGIC + i)) { 1019f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Downlevel Firmware boot loader " 1020f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "[%d/%Zd: got 0x%x, exp 0x%x]. Use the cc_flash " 1021f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "utility to update your boot loader\n", 1022f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker i + 1, sizeof(c2_magic), 1023f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker readb(mmio_regs + C2_REGS_MAGIC + i), 1024f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_magic[i]); 1025f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Adapter not claimed\n"); 1026f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1027f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1028f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1029f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1030f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1031f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1032f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate the adapter version */ 1033f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (be32_to_cpu(readl(mmio_regs + C2_REGS_VERS)) != C2_VERSION) { 1034f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Version mismatch " 1035f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "[fw=%u, c2=%u], Adapter not claimed\n", 1036f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker be32_to_cpu(readl(mmio_regs + C2_REGS_VERS)), 1037f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_VERSION); 1038f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EINVAL; 1039f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1040f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1041f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1042f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1043f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Validate the adapter IVN */ 1044f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (be32_to_cpu(readl(mmio_regs + C2_REGS_IVN)) != C2_IVN) { 1045f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Downlevel FIrmware level. You should be using " 1046f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "the OpenIB device support kit. " 1047f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker "[fw=0x%x, c2=0x%x], Adapter not claimed\n", 1048f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker be32_to_cpu(readl(mmio_regs + C2_REGS_IVN)), 1049f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_IVN); 1050f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EINVAL; 1051f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1052f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1053f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1054f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1055f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Allocate hardware structure */ 1056f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev = (struct c2_dev *) ib_alloc_device(sizeof(*c2dev)); 1057f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (!c2dev) { 1058f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n", 1059f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev)); 1060f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -ENOMEM; 1061f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1062f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail2; 1063f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1064f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1065f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker memset(c2dev, 0, sizeof(*c2dev)); 1066f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker spin_lock_init(&c2dev->lock); 1067f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->pcidev = pcidev; 1068f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->cur_tx = 0; 1069f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1070f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Get the last RX index */ 1071f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->cur_rx = 1072f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker (be32_to_cpu(readl(mmio_regs + C2_REGS_HRX_CUR)) - 1073f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 0xffffc000) / sizeof(struct c2_rxp_desc); 1074f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1075f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Request an interrupt line for the driver */ 1076f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = request_irq(pcidev->irq, c2_interrupt, SA_SHIRQ, DRV_NAME, c2dev); 1077f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 1078f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n", 1079f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_name(pcidev), pcidev->irq); 1080f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1081f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail3; 1082f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1083f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1084f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Set driver specific data */ 1085f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_set_drvdata(pcidev, c2dev); 1086f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1087f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Initialize network device */ 1088f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if ((netdev = c2_devinit(c2dev, mmio_regs)) == NULL) { 1089f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1090f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail4; 1091f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1092f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1093f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Save off the actual size prior to unmapping mmio_regs */ 1094f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kva_map_size = be32_to_cpu(readl(mmio_regs + C2_REGS_PCI_WINSIZE)); 1095f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1096f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unmap the adapter PCI registers in BAR4 */ 1097f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(mmio_regs); 1098f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1099f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Register network device */ 1100f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = register_netdev(netdev); 1101f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 1102f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", 1103f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret); 1104f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail5; 1105f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1106f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1107f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable network packets */ 1108f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker netif_stop_queue(netdev); 1109f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1110f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the adapter HRXDQ PA space to kernel VA space */ 1111f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_rxp_ring = ioremap_nocache(reg4_start + C2_RXP_HRXDQ_OFFSET, 1112f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_RXP_HRXDQ_SIZE); 1113f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2dev->mmio_rxp_ring == 0UL) { 1114f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap MMIO HRXDQ region\n"); 1115f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1116f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail6; 1117f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1118f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1119f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the adapter HTXDQ PA space to kernel VA space */ 1120f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->mmio_txp_ring = ioremap_nocache(reg4_start + C2_TXP_HTXDQ_OFFSET, 1121f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_TXP_HTXDQ_SIZE); 1122f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2dev->mmio_txp_ring == 0UL) { 1123f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap MMIO HTXDQ region\n"); 1124f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1125f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail7; 1126f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1127f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1128f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Save off the current RX index in the last 4 bytes of the TXP Ring */ 1129f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker C2_SET_CUR_RX(c2dev, c2dev->cur_rx); 1130f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1131f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the PCI registers in adapter BAR0 to kernel VA space */ 1132f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->regs = ioremap_nocache(reg0_start, reg0_len); 1133f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2dev->regs == 0UL) { 1134f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap BAR0\n"); 1135f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1136f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail8; 1137f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1138f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1139f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remap the PCI registers in adapter BAR4 to kernel VA space */ 1140f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->pa = reg4_start + C2_PCI_REGS_OFFSET; 1141f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2dev->kva = ioremap_nocache(reg4_start + C2_PCI_REGS_OFFSET, 1142f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker kva_map_size); 1143f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (c2dev->kva == 0UL) { 1144f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "Unable to remap BAR4\n"); 1145f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = -EIO; 1146f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail9; 1147f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1148f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1149f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Print out the MAC address */ 1150f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_print_macaddr(netdev); 1151f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1152f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ret = c2_rnic_init(c2dev); 1153f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker if (ret) { 1154f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker printk(KERN_ERR PFX "c2_rnic_init failed: %d\n", ret); 1155f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker goto bail10; 1156f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker } 1157f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1158f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_register_device(c2dev); 1159f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1160f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return 0; 1161f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1162f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail10: 1163f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->kva); 1164f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1165f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail9: 1166f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->regs); 1167f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1168f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail8: 1169f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_txp_ring); 1170f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1171f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail7: 1172f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_rxp_ring); 1173f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1174f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail6: 1175f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unregister_netdev(netdev); 1176f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1177f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail5: 1178f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_netdev(netdev); 1179f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1180f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail4: 1181f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_irq(pcidev->irq, c2dev); 1182f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1183f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail3: 1184f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ib_dealloc_device(&c2dev->ibdev); 1185f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1186f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail2: 1187f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_release_regions(pcidev); 1188f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1189f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail1: 1190f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_disable_device(pcidev); 1191f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1192f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker bail0: 1193f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker return ret; 1194f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 1195f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1196f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void __devexit c2_remove(struct pci_dev *pcidev) 1197f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 1198f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct c2_dev *c2dev = pci_get_drvdata(pcidev); 1199f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker struct net_device *netdev = c2dev->netdev; 1200f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1201f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unregister with OpenIB */ 1202f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_unregister_device(c2dev); 1203f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1204f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Clean up the RNIC resources */ 1205f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker c2_rnic_term(c2dev); 1206f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1207f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Remove network device from the kernel */ 1208f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker unregister_netdev(netdev); 1209f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1210f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free network device */ 1211f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_netdev(netdev); 1212f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1213f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free the interrupt line */ 1214f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker free_irq(pcidev->irq, c2dev); 1215f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1216f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* missing: Turn LEDs off here */ 1217f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1218f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Unmap adapter PA space */ 1219f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->kva); 1220f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->regs); 1221f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_txp_ring); 1222f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker iounmap(c2dev->mmio_rxp_ring); 1223f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1224f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Free the hardware structure */ 1225f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker ib_dealloc_device(&c2dev->ibdev); 1226f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1227f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Release reserved PCI I/O and memory resources */ 1228f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_release_regions(pcidev); 1229f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1230f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Disable PCI device */ 1231f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_disable_device(pcidev); 1232f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1233f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker /* Clear driver specific data */ 1234f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_set_drvdata(pcidev, NULL); 1235f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 1236f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1237f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic struct pci_driver c2_pci_driver = { 1238f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker .name = DRV_NAME, 1239f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker .id_table = c2_pci_table, 1240f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker .probe = c2_probe, 1241f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker .remove = __devexit_p(c2_remove), 1242f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker}; 1243f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1244f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic int __init c2_init_module(void) 1245f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 1246d986a27413aad10574f7211524de6a529870d134Henrik Kretzschmar return pci_register_driver(&c2_pci_driver); 1247f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 1248f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1249f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckerstatic void __exit c2_exit_module(void) 1250f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker{ 1251f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker pci_unregister_driver(&c2_pci_driver); 1252f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker} 1253f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tucker 1254f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckermodule_init(c2_init_module); 1255f94b533d091a42da92d908eb7b3f9ade1923f90dTom Tuckermodule_exit(c2_exit_module); 1256