diff options
Diffstat (limited to 'drivers/net/pasemi_mac.c')
| -rw-r--r-- | drivers/net/pasemi_mac.c | 1019 |
1 files changed, 0 insertions, 1019 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c deleted file mode 100644 index 76fe9dd8e84..00000000000 --- a/drivers/net/pasemi_mac.c +++ /dev/null @@ -1,1019 +0,0 @@ -/* - * Copyright (C) 2006-2007 PA Semi, Inc - * - * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/interrupt.h> -#include <linux/dmaengine.h> -#include <linux/delay.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <asm/dma-mapping.h> -#include <linux/in.h> -#include <linux/skbuff.h> - -#include <linux/ip.h> -#include <linux/tcp.h> -#include <net/checksum.h> - -#include "pasemi_mac.h" - - -/* TODO list - * - * - Get rid of pci_{read,write}_config(), map registers with ioremap - * for performance - * - PHY support - * - Multicast support - * - Large MTU support - * - Other performance improvements - */ - - -/* Must be a power of two */ -#define RX_RING_SIZE 512 -#define TX_RING_SIZE 512 - -#define TX_DESC(mac, num) ((mac)->tx->desc[(num) & (TX_RING_SIZE-1)]) -#define TX_DESC_INFO(mac, num) ((mac)->tx->desc_info[(num) & (TX_RING_SIZE-1)]) -#define RX_DESC(mac, num) ((mac)->rx->desc[(num) & (RX_RING_SIZE-1)]) -#define RX_DESC_INFO(mac, num) ((mac)->rx->desc_info[(num) & (RX_RING_SIZE-1)]) -#define RX_BUFF(mac, num) ((mac)->rx->buffers[(num) & (RX_RING_SIZE-1)]) - -#define BUF_SIZE 1646 /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */ - -/* XXXOJN these should come out of the device tree some day */ -#define PAS_DMA_CAP_BASE 0xe00d0040 -#define PAS_DMA_CAP_SIZE 0x100 -#define PAS_DMA_COM_BASE 0xe00d0100 -#define PAS_DMA_COM_SIZE 0x100 - -static struct pasdma_status *dma_status; - -static int pasemi_get_mac_addr(struct pasemi_mac *mac) -{ - struct pci_dev *pdev = mac->pdev; - struct device_node *dn = pci_device_to_OF_node(pdev); - const u8 *maddr; - u8 addr[6]; - - if (!dn) { - dev_dbg(&pdev->dev, - "No device node for mac, not configuring\n"); - return -ENOENT; - } - - maddr = get_property(dn, "mac-address", NULL); - if (maddr == NULL) { - dev_warn(&pdev->dev, - "no mac address in device tree, not configuring\n"); - return -ENOENT; - } - - if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0], - &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) { - dev_warn(&pdev->dev, - "can't parse mac address, not configuring\n"); - return -EINVAL; - } - - memcpy(mac->mac_addr, addr, sizeof(addr)); - return 0; -} - -static int pasemi_mac_setup_rx_resources(struct net_device *dev) -{ - struct pasemi_mac_rxring *ring; - struct pasemi_mac *mac = netdev_priv(dev); - int chan_id = mac->dma_rxch; - - ring = kzalloc(sizeof(*ring), GFP_KERNEL); - - if (!ring) - goto out_ring; - - spin_lock_init(&ring->lock); - - ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) * - RX_RING_SIZE, GFP_KERNEL); - - if (!ring->desc_info) - goto out_desc_info; - - /* Allocate descriptors */ - ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * - sizeof(struct pas_dma_xct_descr), - &ring->dma, GFP_KERNEL); - - if (!ring->desc) - goto out_desc; - - memset(ring->desc, 0, RX_RING_SIZE * sizeof(struct pas_dma_xct_descr)); - - ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * sizeof(u64), - &ring->buf_dma, GFP_KERNEL); - if (!ring->buffers) - goto out_buffers; - - memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64)); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEL(chan_id), - PAS_DMA_RXCHAN_BASEL_BRBL(ring->dma)); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_BASEU(chan_id), - PAS_DMA_RXCHAN_BASEU_BRBH(ring->dma >> 32) | - PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 2)); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXCHAN_CFG(chan_id), - PAS_DMA_RXCHAN_CFG_HBU(1)); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEL(mac->dma_if), - PAS_DMA_RXINT_BASEL_BRBL(__pa(ring->buffers))); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_RXINT_BASEU(mac->dma_if), - PAS_DMA_RXINT_BASEU_BRBH(__pa(ring->buffers) >> 32) | - PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3)); - - ring->next_to_fill = 0; - ring->next_to_clean = 0; - - snprintf(ring->irq_name, sizeof(ring->irq_name), - "%s rx", dev->name); - mac->rx = ring; - - return 0; - -out_buffers: - dma_free_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * sizeof(struct pas_dma_xct_descr), - mac->rx->desc, mac->rx->dma); -out_desc: - kfree(ring->desc_info); -out_desc_info: - kfree(ring); -out_ring: - return -ENOMEM; -} - - -static int pasemi_mac_setup_tx_resources(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - u32 val; - int chan_id = mac->dma_txch; - struct pasemi_mac_txring *ring; - - ring = kzalloc(sizeof(*ring), GFP_KERNEL); - if (!ring) - goto out_ring; - - spin_lock_init(&ring->lock); - - ring->desc_info = kzalloc(sizeof(struct pasemi_mac_buffer) * - TX_RING_SIZE, GFP_KERNEL); - if (!ring->desc_info) - goto out_desc_info; - - /* Allocate descriptors */ - ring->desc = dma_alloc_coherent(&mac->dma_pdev->dev, - TX_RING_SIZE * - sizeof(struct pas_dma_xct_descr), - &ring->dma, GFP_KERNEL); - if (!ring->desc) - goto out_desc; - - memset(ring->desc, 0, TX_RING_SIZE * sizeof(struct pas_dma_xct_descr)); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEL(chan_id), - PAS_DMA_TXCHAN_BASEL_BRBL(ring->dma)); - val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->dma >> 32); - val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 2); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_BASEU(chan_id), val); - - pci_write_config_dword(mac->dma_pdev, PAS_DMA_TXCHAN_CFG(chan_id), - PAS_DMA_TXCHAN_CFG_TY_IFACE | - PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) | - PAS_DMA_TXCHAN_CFG_UP | - PAS_DMA_TXCHAN_CFG_WT(2)); - - ring->next_to_use = 0; - ring->next_to_clean = 0; - - snprintf(ring->irq_name, sizeof(ring->irq_name), - "%s tx", dev->name); - mac->tx = ring; - - return 0; - -out_desc: - kfree(ring->desc_info); -out_desc_info: - kfree(ring); -out_ring: - return -ENOMEM; -} - -static void pasemi_mac_free_tx_resources(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int i; - struct pasemi_mac_buffer *info; - struct pas_dma_xct_descr *dp; - - for (i = 0; i < TX_RING_SIZE; i++) { - info = &TX_DESC_INFO(mac, i); - dp = &TX_DESC(mac, i); - if (info->dma) { - if (info->skb) { - pci_unmap_single(mac->dma_pdev, - info->dma, - info->skb->len, - PCI_DMA_TODEVICE); - dev_kfree_skb_any(info->skb); - } - info->dma = 0; - info->skb = NULL; - dp->mactx = 0; - dp->ptr = 0; - } - } - - dma_free_coherent(&mac->dma_pdev->dev, - TX_RING_SIZE * sizeof(struct pas_dma_xct_descr), - mac->tx->desc, mac->tx->dma); - - kfree(mac->tx->desc_info); - kfree(mac->tx); - mac->tx = NULL; -} - -static void pasemi_mac_free_rx_resources(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int i; - struct pasemi_mac_buffer *info; - struct pas_dma_xct_descr *dp; - - for (i = 0; i < RX_RING_SIZE; i++) { - info = &RX_DESC_INFO(mac, i); - dp = &RX_DESC(mac, i); - if (info->dma) { - if (info->skb) { - pci_unmap_single(mac->dma_pdev, - info->dma, - info->skb->len, - PCI_DMA_FROMDEVICE); - dev_kfree_skb_any(info->skb); - } - info->dma = 0; - info->skb = NULL; - dp->macrx = 0; - dp->ptr = 0; - } - } - - dma_free_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * sizeof(struct pas_dma_xct_descr), - mac->rx->desc, mac->rx->dma); - - dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64), - mac->rx->buffers, mac->rx->buf_dma); - - kfree(mac->rx->desc_info); - kfree(mac->rx); - mac->rx = NULL; -} - -static void pasemi_mac_replenish_rx_ring(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int i; - int start = mac->rx->next_to_fill; - unsigned int count; - - count = (mac->rx->next_to_clean + RX_RING_SIZE - - mac->rx->next_to_fill) & (RX_RING_SIZE - 1); - - /* Check to see if we're doing first-time setup */ - if (unlikely(mac->rx->next_to_clean == 0 && mac->rx->next_to_fill == 0)) - count = RX_RING_SIZE; - - if (count <= 0) - return; - - for (i = start; i < start + count; i++) { - struct pasemi_mac_buffer *info = &RX_DESC_INFO(mac, i); - u64 *buff = &RX_BUFF(mac, i); - struct sk_buff *skb; - dma_addr_t dma; - - skb = dev_alloc_skb(BUF_SIZE); - - if (!skb) { - count = i - start; - break; - } - - dma = pci_map_single(mac->dma_pdev, skb->data, skb->len, - PCI_DMA_FROMDEVICE); - - if (dma_mapping_error(dma)) { - dev_kfree_skb_irq(info->skb); - count = i - start; - break; - } - - info->skb = skb; - info->dma = dma; - *buff = XCT_RXB_LEN(BUF_SIZE) | XCT_RXB_ADDR(dma); - } - - wmb(); - - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXCHAN_INCR(mac->dma_rxch), - count); - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXINT_INCR(mac->dma_if), - count); - - mac->rx->next_to_fill += count; -} - -static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit) -{ - unsigned int i; - int start, count; - - spin_lock(&mac->rx->lock); - - start = mac->rx->next_to_clean; - count = 0; - - for (i = start; i < (start + RX_RING_SIZE) && count < limit; i++) { - struct pas_dma_xct_descr *dp; - struct pasemi_mac_buffer *info; - struct sk_buff *skb; - unsigned int j, len; - dma_addr_t dma; - - rmb(); - - dp = &RX_DESC(mac, i); - - if (!(dp->macrx & XCT_MACRX_O)) - break; - - count++; - - info = NULL; - - /* We have to scan for our skb since there's no way - * to back-map them from the descriptor, and if we - * have several receive channels then they might not - * show up in the same order as they were put on the - * interface ring. - */ - - dma = (dp->ptr & XCT_PTR_ADDR_M); - for (j = start; j < (start + RX_RING_SIZE); j++) { - info = &RX_DESC_INFO(mac, j); - if (info->dma == dma) - break; - } - - BUG_ON(!info); - BUG_ON(info->dma != dma); - - pci_unmap_single(mac->dma_pdev, info->dma, info->skb->len, - PCI_DMA_FROMDEVICE); - - skb = info->skb; - - len = (dp->macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S; - - skb_put(skb, len); - - skb->protocol = eth_type_trans(skb, mac->netdev); - - if ((dp->macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK) { - skb->ip_summed = CHECKSUM_COMPLETE; - skb->csum = (dp->macrx & XCT_MACRX_CSUM_M) >> - XCT_MACRX_CSUM_S; - } else - skb->ip_summed = CHECKSUM_NONE; - - mac->stats.rx_bytes += len; - mac->stats.rx_packets++; - - netif_receive_skb(skb); - - info->dma = 0; - info->skb = NULL; - dp->ptr = 0; - dp->macrx = 0; - } - - mac->rx->next_to_clean += count; - pasemi_mac_replenish_rx_ring(mac->netdev); - - spin_unlock(&mac->rx->lock); - - return count; -} - -static int pasemi_mac_clean_tx(struct pasemi_mac *mac) -{ - int i; - struct pasemi_mac_buffer *info; - struct pas_dma_xct_descr *dp; - int start, count; - int flags; - - spin_lock_irqsave(&mac->tx->lock, flags); - - start = mac->tx->next_to_clean; - count = 0; - - for (i = start; i < mac->tx->next_to_use; i++) { - dp = &TX_DESC(mac, i); - if (!dp || (dp->mactx & XCT_MACTX_O)) - break; - - count++; - - info = &TX_DESC_INFO(mac, i); - - pci_unmap_single(mac->dma_pdev, info->dma, - info->skb->len, PCI_DMA_TODEVICE); - dev_kfree_skb_irq(info->skb); - - info->skb = NULL; - info->dma = 0; - dp->mactx = 0; - dp->ptr = 0; - } - mac->tx->next_to_clean += count; - spin_unlock_irqrestore(&mac->tx->lock, flags); - - return count; -} - - -static irqreturn_t pasemi_mac_rx_intr(int irq, void *data) -{ - struct net_device *dev = data; - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int reg; - - if (!(*mac->rx_status & PAS_STATUS_INT)) - return IRQ_NONE; - - netif_rx_schedule(dev); - pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG, - PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0)); - - reg = PAS_IOB_DMA_RXCH_RESET_PINTC | PAS_IOB_DMA_RXCH_RESET_SINTC | - PAS_IOB_DMA_RXCH_RESET_DINTC; - if (*mac->rx_status & PAS_STATUS_TIMER) - reg |= PAS_IOB_DMA_RXCH_RESET_TINTC; - - pci_write_config_dword(mac->iob_pdev, - PAS_IOB_DMA_RXCH_RESET(mac->dma_rxch), reg); - - - return IRQ_HANDLED; -} - -static irqreturn_t pasemi_mac_tx_intr(int irq, void *data) -{ - struct net_device *dev = data; - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int reg; - int was_full; - - was_full = mac->tx->next_to_clean - mac->tx->next_to_use == TX_RING_SIZE; - - if (!(*mac->tx_status & PAS_STATUS_INT)) - return IRQ_NONE; - - pasemi_mac_clean_tx(mac); - - reg = PAS_IOB_DMA_TXCH_RESET_PINTC | PAS_IOB_DMA_TXCH_RESET_SINTC; - if (*mac->tx_status & PAS_STATUS_TIMER) - reg |= PAS_IOB_DMA_TXCH_RESET_TINTC; - - pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch), - reg); - - if (was_full) - netif_wake_queue(dev); - - return IRQ_HANDLED; -} - -static int pasemi_mac_open(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int flags; - int ret; - - /* enable rx section */ - pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_RXCMD, - PAS_DMA_COM_RXCMD_EN); - - /* enable tx section */ - pci_write_config_dword(mac->dma_pdev, PAS_DMA_COM_TXCMD, - PAS_DMA_COM_TXCMD_EN); - - flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) | - PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) | - PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12); - - pci_write_config_dword(mac->pdev, PAS_MAC_CFG_TXP, flags); - - flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PE | - PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE; - - flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G; - - pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_RXCH_CFG(mac->dma_rxch), - PAS_IOB_DMA_RXCH_CFG_CNTTH(30)); - - pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG, - PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(1000000)); - - pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags); - - ret = pasemi_mac_setup_rx_resources(dev); - if (ret) - goto out_rx_resources; - - ret = pasemi_mac_setup_tx_resources(dev); - if (ret) - goto out_tx_resources; - - pci_write_config_dword(mac->pdev, PAS_MAC_IPC_CHNL, - PAS_MAC_IPC_CHNL_DCHNO(mac->dma_rxch) | - PAS_MAC_IPC_CHNL_BCH(mac->dma_rxch)); - - /* enable rx if */ - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXINT_RCMDSTA(mac->dma_if), - PAS_DMA_RXINT_RCMDSTA_EN); - - /* enable rx channel */ - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), - PAS_DMA_RXCHAN_CCMDSTA_EN | - PAS_DMA_RXCHAN_CCMDSTA_DU); - - /* enable tx channel */ - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), - PAS_DMA_TXCHAN_TCMDSTA_EN); - - pasemi_mac_replenish_rx_ring(dev); - - netif_start_queue(dev); - netif_poll_enable(dev); - - ret = request_irq(mac->dma_pdev->irq + mac->dma_txch, - &pasemi_mac_tx_intr, IRQF_DISABLED, - mac->tx->irq_name, dev); - if (ret) { - dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", - mac->dma_pdev->irq + mac->dma_txch, ret); - goto out_tx_int; - } - - ret = request_irq(mac->dma_pdev->irq + 20 + mac->dma_rxch, - &pasemi_mac_rx_intr, IRQF_DISABLED, - mac->rx->irq_name, dev); - if (ret) { - dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", - mac->dma_pdev->irq + 20 + mac->dma_rxch, ret); - goto out_rx_int; - } - - return 0; - -out_rx_int: - free_irq(mac->dma_pdev->irq + mac->dma_txch, dev); -out_tx_int: - netif_poll_disable(dev); - netif_stop_queue(dev); - pasemi_mac_free_tx_resources(dev); -out_tx_resources: - pasemi_mac_free_rx_resources(dev); -out_rx_resources: - - return ret; -} - -#define MAX_RETRIES 5000 - -static int pasemi_mac_close(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int stat; - int retries; - - netif_stop_queue(dev); - - /* Clean out any pending buffers */ - pasemi_mac_clean_tx(mac); - pasemi_mac_clean_rx(mac, RX_RING_SIZE); - - /* Disable interface */ - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), - PAS_DMA_TXCHAN_TCMDSTA_ST); - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXINT_RCMDSTA(mac->dma_if), - PAS_DMA_RXINT_RCMDSTA_ST); - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), - PAS_DMA_RXCHAN_CCMDSTA_ST); - - for (retries = 0; retries < MAX_RETRIES; retries++) { - pci_read_config_dword(mac->dma_pdev, - PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), - &stat); - if (stat & PAS_DMA_TXCHAN_TCMDSTA_ACT) - break; - cond_resched(); - } - - if (!(stat & PAS_DMA_TXCHAN_TCMDSTA_ACT)) { - dev_err(&mac->dma_pdev->dev, "Failed to stop tx channel\n"); - } - - for (retries = 0; retries < MAX_RETRIES; retries++) { - pci_read_config_dword(mac->dma_pdev, - PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), - &stat); - if (stat & PAS_DMA_RXCHAN_CCMDSTA_ACT) - break; - cond_resched(); - } - - if (!(stat & PAS_DMA_RXCHAN_CCMDSTA_ACT)) { - dev_err(&mac->dma_pdev->dev, "Failed to stop rx channel\n"); - } - - for (retries = 0; retries < MAX_RETRIES; retries++) { - pci_read_config_dword(mac->dma_pdev, - PAS_DMA_RXINT_RCMDSTA(mac->dma_if), - &stat); - if (stat & PAS_DMA_RXINT_RCMDSTA_ACT) - break; - cond_resched(); - } - - if (!(stat & PAS_DMA_RXINT_RCMDSTA_ACT)) { - dev_err(&mac->dma_pdev->dev, "Failed to stop rx interface\n"); - } - - /* Then, disable the channel. This must be done separately from - * stopping, since you can't disable when active. - */ - - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_TXCHAN_TCMDSTA(mac->dma_txch), 0); - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXCHAN_CCMDSTA(mac->dma_rxch), 0); - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0); - - free_irq(mac->dma_pdev->irq + mac->dma_txch, dev); - free_irq(mac->dma_pdev->irq + 20 + mac->dma_rxch, dev); - - /* Free resources */ - pasemi_mac_free_rx_resources(dev); - pasemi_mac_free_tx_resources(dev); - - return 0; -} - -static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - struct pasemi_mac_txring *txring; - struct pasemi_mac_buffer *info; - struct pas_dma_xct_descr *dp; - u64 dflags; - dma_addr_t map; - int flags; - - dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_SS | XCT_MACTX_CRC_PAD; - - if (skb->ip_summed == CHECKSUM_PARTIAL) { - const unsigned char *nh = skb_network_header(skb); - - switch (ip_hdr(skb)->protocol) { - case IPPROTO_TCP: - dflags |= XCT_MACTX_CSUM_TCP; - dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2); - dflags |= XCT_MACTX_IPO(nh - skb->data); - break; - case IPPROTO_UDP: - dflags |= XCT_MACTX_CSUM_UDP; - dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2); - dflags |= XCT_MACTX_IPO(nh - skb->data); - break; - } - } - - map = pci_map_single(mac->dma_pdev, skb->data, skb->len, PCI_DMA_TODEVICE); - - if (dma_mapping_error(map)) - return NETDEV_TX_BUSY; - - txring = mac->tx; - - spin_lock_irqsave(&txring->lock, flags); - - if (txring->next_to_clean - txring->next_to_use == TX_RING_SIZE) { - spin_unlock_irqrestore(&txring->lock, flags); - pasemi_mac_clean_tx(mac); - spin_lock_irqsave(&txring->lock, flags); - - if (txring->next_to_clean - txring->next_to_use == - TX_RING_SIZE) { - /* Still no room -- stop the queue and wait for tx - * intr when there's room. - */ - netif_stop_queue(dev); - goto out_err; - } - } - - - dp = &TX_DESC(mac, txring->next_to_use); - info = &TX_DESC_INFO(mac, txring->next_to_use); - - dp->mactx = dflags | XCT_MACTX_LLEN(skb->len); - dp->ptr = XCT_PTR_LEN(skb->len) | XCT_PTR_ADDR(map); - info->dma = map; - info->skb = skb; - - txring->next_to_use++; - mac->stats.tx_packets++; - mac->stats.tx_bytes += skb->len; - - spin_unlock_irqrestore(&txring->lock, flags); - - pci_write_config_dword(mac->dma_pdev, - PAS_DMA_TXCHAN_INCR(mac->dma_txch), 1); - - return NETDEV_TX_OK; - -out_err: - spin_unlock_irqrestore(&txring->lock, flags); - pci_unmap_single(mac->dma_pdev, map, skb->len, PCI_DMA_TODEVICE); - return NETDEV_TX_BUSY; -} - -static struct net_device_stats *pasemi_mac_get_stats(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - - return &mac->stats; -} - -static void pasemi_mac_set_rx_mode(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int flags; - - pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags); - - /* Set promiscuous */ - if (dev->flags & IFF_PROMISC) - flags |= PAS_MAC_CFG_PCFG_PR; - else - flags &= ~PAS_MAC_CFG_PCFG_PR; - - pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, flags); -} - - -static int pasemi_mac_poll(struct net_device *dev, int *budget) -{ - int pkts, limit = min(*budget, dev->quota); - struct pasemi_mac *mac = netdev_priv(dev); - - pkts = pasemi_mac_clean_rx(mac, limit); - - if (pkts < limit) { - /* all done, no more packets present */ - netif_rx_complete(dev); - - /* re-enable receive interrupts */ - pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_COM_TIMEOUTCFG, - PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(1000000)); - return 0; - } else { - /* used up our quantum, so reschedule */ - dev->quota -= pkts; - *budget -= pkts; - return 1; - } -} - -static int __devinit -pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - static int index = 0; - struct net_device *dev; - struct pasemi_mac *mac; - int err; - - err = pci_enable_device(pdev); - if (err) - return err; - - dev = alloc_etherdev(sizeof(struct pasemi_mac)); - if (dev == NULL) { - dev_err(&pdev->dev, - "pasemi_mac: Could not allocate ethernet device.\n"); - err = -ENOMEM; - goto out_disable_device; - } - - SET_MODULE_OWNER(dev); - pci_set_drvdata(pdev, dev); - SET_NETDEV_DEV(dev, &pdev->dev); - - mac = netdev_priv(dev); - - mac->pdev = pdev; - mac->netdev = dev; - mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL); - - if (!mac->dma_pdev) { - dev_err(&pdev->dev, "Can't find DMA Controller\n"); - err = -ENODEV; - goto out_free_netdev; - } - - mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL); - - if (!mac->iob_pdev) { - dev_err(&pdev->dev, "Can't find I/O Bridge\n"); - err = -ENODEV; - goto out_put_dma_pdev; - } - - /* These should come out of the device tree eventually */ - mac->dma_txch = index; - mac->dma_rxch = index; - - /* We probe GMAC before XAUI, but the DMA interfaces are - * in XAUI, GMAC order. - */ - if (index < 4) - mac->dma_if = index + 2; - else - mac->dma_if = index - 4; - index++; - - switch (pdev->device) { - case 0xa005: - mac->type = MAC_TYPE_GMAC; - break; - case 0xa006: - mac->type = MAC_TYPE_XAUI; - break; - default: - err = -ENODEV; - goto out; - } - - /* get mac addr from device tree */ - if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) { - err = -ENODEV; - goto out; - } - memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr)); - - dev->open = pasemi_mac_open; - dev->stop = pasemi_mac_close; - dev->hard_start_xmit = pasemi_mac_start_tx; - dev->get_stats = pasemi_mac_get_stats; - dev->set_multicast_list = pasemi_mac_set_rx_mode; - dev->weight = 64; - dev->poll = pasemi_mac_poll; - dev->features = NETIF_F_HW_CSUM; - - /* The dma status structure is located in the I/O bridge, and - * is cache coherent. - */ - if (!dma_status) - /* XXXOJN This should come from the device tree */ - dma_status = __ioremap(0xfd800000, 0x1000, 0); - - mac->rx_status = &dma_status->rx_sta[mac->dma_rxch]; - mac->tx_status = &dma_status->tx_sta[mac->dma_txch]; - - err = register_netdev(dev); - - if (err) { - dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n", - err); - goto out; - } else - printk(KERN_INFO "%s: PA Semi %s: intf %d, txch %d, rxch %d, " - "hw addr %02x:%02x:%02x:%02x:%02x:%02x\n", - dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI", - mac->dma_if, mac->dma_txch, mac->dma_rxch, - dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], - dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); - - return err; - -out: - pci_dev_put(mac->iob_pdev); -out_put_dma_pdev: - pci_dev_put(mac->dma_pdev); -out_free_netdev: - free_netdev(dev); -out_disable_device: - pci_disable_device(pdev); - return err; - -} - -static void __devexit pasemi_mac_remove(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct pasemi_mac *mac; - - if (!netdev) - return; - - mac = netdev_priv(netdev); - - unregister_netdev(netdev); - - pci_disable_device(pdev); - pci_dev_put(mac->dma_pdev); - pci_dev_put(mac->iob_pdev); - - pci_set_drvdata(pdev, NULL); - free_netdev(netdev); -} - -static struct pci_device_id pasemi_mac_pci_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) }, - { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) }, -}; - -MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl); - -static struct pci_driver pasemi_mac_driver = { - .name = "pasemi_mac", - .id_table = pasemi_mac_pci_tbl, - .probe = pasemi_mac_probe, - .remove = __devexit_p(pasemi_mac_remove), -}; - -static void __exit pasemi_mac_cleanup_module(void) -{ - pci_unregister_driver(&pasemi_mac_driver); - __iounmap(dma_status); - dma_status = NULL; -} - -int pasemi_mac_init_module(void) -{ - return pci_register_driver(&pasemi_mac_driver); -} - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>"); -MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver"); - -module_init(pasemi_mac_init_module); -module_exit(pasemi_mac_cleanup_module); |