diff options
author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-04-07 06:03:04 -0700 |
---|---|---|
committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-10 19:54:39 -0700 |
commit | adfc5217e9db68d3f0cec8dd847c1a6d3ab549ee (patch) | |
tree | 4082ae79d2d4d40b39c9b5144b8171464b5f7eb2 /drivers/net/b44.c | |
parent | 644570b830266ff33ff5f3542b9c838f93a55ea6 (diff) |
broadcom: Move the Broadcom drivers
Moves the drivers for Broadcom devices into
drivers/net/ethernet/broadcom/ and the necessary Kconfig and Makefile
changes.
CC: Eilon Greenstein <eilong@broadcom.com>
CC: Michael Chan <mchan@broadcom.com>
CC: Matt Carlson <mcarlson@broadcom.com>
CC: Gary Zambrano <zambrano@broadcom.com>
CC: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/b44.c')
-rw-r--r-- | drivers/net/b44.c | 2374 |
1 files changed, 0 insertions, 2374 deletions
diff --git a/drivers/net/b44.c b/drivers/net/b44.c deleted file mode 100644 index 41ea84e3f69c..000000000000 --- a/drivers/net/b44.c +++ /dev/null @@ -1,2374 +0,0 @@ -/* b44.c: Broadcom 44xx/47xx Fast Ethernet device driver. - * - * Copyright (C) 2002 David S. Miller (davem@redhat.com) - * Copyright (C) 2004 Pekka Pietikainen (pp@ee.oulu.fi) - * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org) - * Copyright (C) 2006 Felix Fietkau (nbd@openwrt.org) - * Copyright (C) 2006 Broadcom Corporation. - * Copyright (C) 2007 Michael Buesch <m@bues.ch> - * - * Distribute under GPL. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/types.h> -#include <linux/netdevice.h> -#include <linux/ethtool.h> -#include <linux/mii.h> -#include <linux/if_ether.h> -#include <linux/if_vlan.h> -#include <linux/etherdevice.h> -#include <linux/pci.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/dma-mapping.h> -#include <linux/ssb/ssb.h> -#include <linux/slab.h> - -#include <asm/uaccess.h> -#include <asm/io.h> -#include <asm/irq.h> - - -#include "b44.h" - -#define DRV_MODULE_NAME "b44" -#define DRV_MODULE_VERSION "2.0" -#define DRV_DESCRIPTION "Broadcom 44xx/47xx 10/100 PCI ethernet driver" - -#define B44_DEF_MSG_ENABLE \ - (NETIF_MSG_DRV | \ - NETIF_MSG_PROBE | \ - NETIF_MSG_LINK | \ - NETIF_MSG_TIMER | \ - NETIF_MSG_IFDOWN | \ - NETIF_MSG_IFUP | \ - NETIF_MSG_RX_ERR | \ - NETIF_MSG_TX_ERR) - -/* length of time before we decide the hardware is borked, - * and dev->tx_timeout() should be called to fix the problem - */ -#define B44_TX_TIMEOUT (5 * HZ) - -/* hardware minimum and maximum for a single frame's data payload */ -#define B44_MIN_MTU 60 -#define B44_MAX_MTU 1500 - -#define B44_RX_RING_SIZE 512 -#define B44_DEF_RX_RING_PENDING 200 -#define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \ - B44_RX_RING_SIZE) -#define B44_TX_RING_SIZE 512 -#define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1) -#define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \ - B44_TX_RING_SIZE) - -#define TX_RING_GAP(BP) \ - (B44_TX_RING_SIZE - (BP)->tx_pending) -#define TX_BUFFS_AVAIL(BP) \ - (((BP)->tx_cons <= (BP)->tx_prod) ? \ - (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \ - (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP)) -#define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1)) - -#define RX_PKT_OFFSET (RX_HEADER_LEN + 2) -#define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET) - -/* minimum number of free TX descriptors required to wake up TX process */ -#define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4) - -/* b44 internal pattern match filter info */ -#define B44_PATTERN_BASE 0x400 -#define B44_PATTERN_SIZE 0x80 -#define B44_PMASK_BASE 0x600 -#define B44_PMASK_SIZE 0x10 -#define B44_MAX_PATTERNS 16 -#define B44_ETHIPV6UDP_HLEN 62 -#define B44_ETHIPV4UDP_HLEN 42 - -MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller"); -MODULE_DESCRIPTION(DRV_DESCRIPTION); -MODULE_LICENSE("GPL"); -MODULE_VERSION(DRV_MODULE_VERSION); - -static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */ -module_param(b44_debug, int, 0); -MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value"); - - -#ifdef CONFIG_B44_PCI -static DEFINE_PCI_DEVICE_TABLE(b44_pci_tbl) = { - { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) }, - { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) }, - { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) }, - { 0 } /* terminate list with empty entry */ -}; -MODULE_DEVICE_TABLE(pci, b44_pci_tbl); - -static struct pci_driver b44_pci_driver = { - .name = DRV_MODULE_NAME, - .id_table = b44_pci_tbl, -}; -#endif /* CONFIG_B44_PCI */ - -static const struct ssb_device_id b44_ssb_tbl[] = { - SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV), - SSB_DEVTABLE_END -}; -MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl); - -static void b44_halt(struct b44 *); -static void b44_init_rings(struct b44 *); - -#define B44_FULL_RESET 1 -#define B44_FULL_RESET_SKIP_PHY 2 -#define B44_PARTIAL_RESET 3 -#define B44_CHIP_RESET_FULL 4 -#define B44_CHIP_RESET_PARTIAL 5 - -static void b44_init_hw(struct b44 *, int); - -static int dma_desc_sync_size; -static int instance; - -static const char b44_gstrings[][ETH_GSTRING_LEN] = { -#define _B44(x...) # x, -B44_STAT_REG_DECLARE -#undef _B44 -}; - -static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev, - dma_addr_t dma_base, - unsigned long offset, - enum dma_data_direction dir) -{ - dma_sync_single_for_device(sdev->dma_dev, dma_base + offset, - dma_desc_sync_size, dir); -} - -static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev, - dma_addr_t dma_base, - unsigned long offset, - enum dma_data_direction dir) -{ - dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset, - dma_desc_sync_size, dir); -} - -static inline unsigned long br32(const struct b44 *bp, unsigned long reg) -{ - return ssb_read32(bp->sdev, reg); -} - -static inline void bw32(const struct b44 *bp, - unsigned long reg, unsigned long val) -{ - ssb_write32(bp->sdev, reg, val); -} - -static int b44_wait_bit(struct b44 *bp, unsigned long reg, - u32 bit, unsigned long timeout, const int clear) -{ - unsigned long i; - - for (i = 0; i < timeout; i++) { - u32 val = br32(bp, reg); - - if (clear && !(val & bit)) - break; - if (!clear && (val & bit)) - break; - udelay(10); - } - if (i == timeout) { - if (net_ratelimit()) - netdev_err(bp->dev, "BUG! Timeout waiting for bit %08x of register %lx to %s\n", - bit, reg, clear ? "clear" : "set"); - - return -ENODEV; - } - return 0; -} - -static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index) -{ - u32 val; - - bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ | - (index << CAM_CTRL_INDEX_SHIFT))); - - b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1); - - val = br32(bp, B44_CAM_DATA_LO); - - data[2] = (val >> 24) & 0xFF; - data[3] = (val >> 16) & 0xFF; - data[4] = (val >> 8) & 0xFF; - data[5] = (val >> 0) & 0xFF; - - val = br32(bp, B44_CAM_DATA_HI); - - data[0] = (val >> 8) & 0xFF; - data[1] = (val >> 0) & 0xFF; -} - -static inline void __b44_cam_write(struct b44 *bp, unsigned char *data, int index) -{ - u32 val; - - val = ((u32) data[2]) << 24; - val |= ((u32) data[3]) << 16; - val |= ((u32) data[4]) << 8; - val |= ((u32) data[5]) << 0; - bw32(bp, B44_CAM_DATA_LO, val); - val = (CAM_DATA_HI_VALID | - (((u32) data[0]) << 8) | - (((u32) data[1]) << 0)); - bw32(bp, B44_CAM_DATA_HI, val); - bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE | - (index << CAM_CTRL_INDEX_SHIFT))); - b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1); -} - -static inline void __b44_disable_ints(struct b44 *bp) -{ - bw32(bp, B44_IMASK, 0); -} - -static void b44_disable_ints(struct b44 *bp) -{ - __b44_disable_ints(bp); - - /* Flush posted writes. */ - br32(bp, B44_IMASK); -} - -static void b44_enable_ints(struct b44 *bp) -{ - bw32(bp, B44_IMASK, bp->imask); -} - -static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val) -{ - int err; - - bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII); - bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START | - (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) | - (phy_addr << MDIO_DATA_PMD_SHIFT) | - (reg << MDIO_DATA_RA_SHIFT) | - (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT))); - err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0); - *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA; - - return err; -} - -static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val) -{ - bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII); - bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START | - (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) | - (phy_addr << MDIO_DATA_PMD_SHIFT) | - (reg << MDIO_DATA_RA_SHIFT) | - (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) | - (val & MDIO_DATA_DATA))); - return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0); -} - -static inline int b44_readphy(struct b44 *bp, int reg, u32 *val) -{ - if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) - return 0; - - return __b44_readphy(bp, bp->phy_addr, reg, val); -} - -static inline int b44_writephy(struct b44 *bp, int reg, u32 val) -{ - if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) - return 0; - - return __b44_writephy(bp, bp->phy_addr, reg, val); -} - -/* miilib interface */ -static int b44_mii_read(struct net_device *dev, int phy_id, int location) -{ - u32 val; - struct b44 *bp = netdev_priv(dev); - int rc = __b44_readphy(bp, phy_id, location, &val); - if (rc) - return 0xffffffff; - return val; -} - -static void b44_mii_write(struct net_device *dev, int phy_id, int location, - int val) -{ - struct b44 *bp = netdev_priv(dev); - __b44_writephy(bp, phy_id, location, val); -} - -static int b44_phy_reset(struct b44 *bp) -{ - u32 val; - int err; - - if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) - return 0; - err = b44_writephy(bp, MII_BMCR, BMCR_RESET); - if (err) - return err; - udelay(100); - err = b44_readphy(bp, MII_BMCR, &val); - if (!err) { - if (val & BMCR_RESET) { - netdev_err(bp->dev, "PHY Reset would not complete\n"); - err = -ENODEV; - } - } - - return err; -} - -static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags) -{ - u32 val; - - bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE); - bp->flags |= pause_flags; - - val = br32(bp, B44_RXCONFIG); - if (pause_flags & B44_FLAG_RX_PAUSE) - val |= RXCONFIG_FLOW; - else - val &= ~RXCONFIG_FLOW; - bw32(bp, B44_RXCONFIG, val); - - val = br32(bp, B44_MAC_FLOW); - if (pause_flags & B44_FLAG_TX_PAUSE) - val |= (MAC_FLOW_PAUSE_ENAB | - (0xc0 & MAC_FLOW_RX_HI_WATER)); - else - val &= ~MAC_FLOW_PAUSE_ENAB; - bw32(bp, B44_MAC_FLOW, val); -} - -static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote) -{ - u32 pause_enab = 0; - - /* The driver supports only rx pause by default because - the b44 mac tx pause mechanism generates excessive - pause frames. - Use ethtool to turn on b44 tx pause if necessary. - */ - if ((local & ADVERTISE_PAUSE_CAP) && - (local & ADVERTISE_PAUSE_ASYM)){ - if ((remote & LPA_PAUSE_ASYM) && - !(remote & LPA_PAUSE_CAP)) - pause_enab |= B44_FLAG_RX_PAUSE; - } - - __b44_set_flow_ctrl(bp, pause_enab); -} - -#ifdef CONFIG_BCM47XX -#include <asm/mach-bcm47xx/nvram.h> -static void b44_wap54g10_workaround(struct b44 *bp) -{ - char buf[20]; - u32 val; - int err; - - /* - * workaround for bad hardware design in Linksys WAP54G v1.0 - * see https://dev.openwrt.org/ticket/146 - * check and reset bit "isolate" - */ - if (nvram_getenv("boardnum", buf, sizeof(buf)) < 0) - return; - if (simple_strtoul(buf, NULL, 0) == 2) { - err = __b44_readphy(bp, 0, MII_BMCR, &val); - if (err) - goto error; - if (!(val & BMCR_ISOLATE)) - return; - val &= ~BMCR_ISOLATE; - err = __b44_writephy(bp, 0, MII_BMCR, val); - if (err) - goto error; - } - return; -error: - pr_warning("PHY: cannot reset MII transceiver isolate bit\n"); -} -#else -static inline void b44_wap54g10_workaround(struct b44 *bp) -{ -} -#endif - -static int b44_setup_phy(struct b44 *bp) -{ - u32 val; - int err; - - b44_wap54g10_workaround(bp); - - if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) - return 0; - if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0) - goto out; - if ((err = b44_writephy(bp, B44_MII_ALEDCTRL, - val & MII_ALEDCTRL_ALLMSK)) != 0) - goto out; - if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0) - goto out; - if ((err = b44_writephy(bp, B44_MII_TLEDCTRL, - val | MII_TLEDCTRL_ENABLE)) != 0) - goto out; - - if (!(bp->flags & B44_FLAG_FORCE_LINK)) { - u32 adv = ADVERTISE_CSMA; - - if (bp->flags & B44_FLAG_ADV_10HALF) - adv |= ADVERTISE_10HALF; - if (bp->flags & B44_FLAG_ADV_10FULL) - adv |= ADVERTISE_10FULL; - if (bp->flags & B44_FLAG_ADV_100HALF) - adv |= ADVERTISE_100HALF; - if (bp->flags & B44_FLAG_ADV_100FULL) - adv |= ADVERTISE_100FULL; - - if (bp->flags & B44_FLAG_PAUSE_AUTO) - adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM; - - if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0) - goto out; - if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE | - BMCR_ANRESTART))) != 0) - goto out; - } else { - u32 bmcr; - - if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0) - goto out; - bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100); - if (bp->flags & B44_FLAG_100_BASE_T) - bmcr |= BMCR_SPEED100; - if (bp->flags & B44_FLAG_FULL_DUPLEX) - bmcr |= BMCR_FULLDPLX; - if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0) - goto out; - - /* Since we will not be negotiating there is no safe way - * to determine if the link partner supports flow control - * or not. So just disable it completely in this case. - */ - b44_set_flow_ctrl(bp, 0, 0); - } - -out: - return err; -} - -static void b44_stats_update(struct b44 *bp) -{ - unsigned long reg; - u32 *val; - - val = &bp->hw_stats.tx_good_octets; - for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) { - *val++ += br32(bp, reg); - } - - /* Pad */ - reg += 8*4UL; - - for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) { - *val++ += br32(bp, reg); - } -} - -static void b44_link_report(struct b44 *bp) -{ - if (!netif_carrier_ok(bp->dev)) { - netdev_info(bp->dev, "Link is down\n"); - } else { - netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n", - (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10, - (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half"); - - netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n", - (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off", - (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off"); - } -} - -static void b44_check_phy(struct b44 *bp) -{ - u32 bmsr, aux; - - if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) { - bp->flags |= B44_FLAG_100_BASE_T; - bp->flags |= B44_FLAG_FULL_DUPLEX; - if (!netif_carrier_ok(bp->dev)) { - u32 val = br32(bp, B44_TX_CTRL); - val |= TX_CTRL_DUPLEX; - bw32(bp, B44_TX_CTRL, val); - netif_carrier_on(bp->dev); - b44_link_report(bp); - } - return; - } - - if (!b44_readphy(bp, MII_BMSR, &bmsr) && - !b44_readphy(bp, B44_MII_AUXCTRL, &aux) && - (bmsr != 0xffff)) { - if (aux & MII_AUXCTRL_SPEED) - bp->flags |= B44_FLAG_100_BASE_T; - else - bp->flags &= ~B44_FLAG_100_BASE_T; - if (aux & MII_AUXCTRL_DUPLEX) - bp->flags |= B44_FLAG_FULL_DUPLEX; - else - bp->flags &= ~B44_FLAG_FULL_DUPLEX; - - if (!netif_carrier_ok(bp->dev) && - (bmsr & BMSR_LSTATUS)) { - u32 val = br32(bp, B44_TX_CTRL); - u32 local_adv, remote_adv; - - if (bp->flags & B44_FLAG_FULL_DUPLEX) - val |= TX_CTRL_DUPLEX; - else - val &= ~TX_CTRL_DUPLEX; - bw32(bp, B44_TX_CTRL, val); - - if (!(bp->flags & B44_FLAG_FORCE_LINK) && - !b44_readphy(bp, MII_ADVERTISE, &local_adv) && - !b44_readphy(bp, MII_LPA, &remote_adv)) - b44_set_flow_ctrl(bp, local_adv, remote_adv); - - /* Link now up */ - netif_carrier_on(bp->dev); - b44_link_report(bp); - } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) { - /* Link now down */ - netif_carrier_off(bp->dev); - b44_link_report(bp); - } - - if (bmsr & BMSR_RFAULT) - netdev_warn(bp->dev, "Remote fault detected in PHY\n"); - if (bmsr & BMSR_JCD) - netdev_warn(bp->dev, "Jabber detected in PHY\n"); - } -} - -static void b44_timer(unsigned long __opaque) -{ - struct b44 *bp = (struct b44 *) __opaque; - - spin_lock_irq(&bp->lock); - - b44_check_phy(bp); - - b44_stats_update(bp); - - spin_unlock_irq(&bp->lock); - - mod_timer(&bp->timer, round_jiffies(jiffies + HZ)); -} - -static void b44_tx(struct b44 *bp) -{ - u32 cur, cons; - - cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK; - cur /= sizeof(struct dma_desc); - - /* XXX needs updating when NETIF_F_SG is supported */ - for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) { - struct ring_info *rp = &bp->tx_buffers[cons]; - struct sk_buff *skb = rp->skb; - - BUG_ON(skb == NULL); - - dma_unmap_single(bp->sdev->dma_dev, - rp->mapping, - skb->len, - DMA_TO_DEVICE); - rp->skb = NULL; - dev_kfree_skb(skb); - } - - bp->tx_cons = cons; - if (netif_queue_stopped(bp->dev) && - TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH) - netif_wake_queue(bp->dev); - - bw32(bp, B44_GPTIMER, 0); -} - -/* Works like this. This chip writes a 'struct rx_header" 30 bytes - * before the DMA address you give it. So we allocate 30 more bytes - * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then - * point the chip at 30 bytes past where the rx_header will go. - */ -static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked) -{ - struct dma_desc *dp; - struct ring_info *src_map, *map; - struct rx_header *rh; - struct sk_buff *skb; - dma_addr_t mapping; - int dest_idx; - u32 ctrl; - - src_map = NULL; - if (src_idx >= 0) - src_map = &bp->rx_buffers[src_idx]; - dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1); - map = &bp->rx_buffers[dest_idx]; - skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ); - if (skb == NULL) - return -ENOMEM; - - mapping = dma_map_single(bp->sdev->dma_dev, skb->data, - RX_PKT_BUF_SZ, - DMA_FROM_DEVICE); - - /* Hardware bug work-around, the chip is unable to do PCI DMA - to/from anything above 1GB :-( */ - if (dma_mapping_error(bp->sdev->dma_dev, mapping) || - mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) { - /* Sigh... */ - if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) - dma_unmap_single(bp->sdev->dma_dev, mapping, - RX_PKT_BUF_SZ, DMA_FROM_DEVICE); - dev_kfree_skb_any(skb); - skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA); - if (skb == NULL) - return -ENOMEM; - mapping = dma_map_single(bp->sdev->dma_dev, skb->data, - RX_PKT_BUF_SZ, - DMA_FROM_DEVICE); - if (dma_mapping_error(bp->sdev->dma_dev, mapping) || - mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) { - if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) - dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE); - dev_kfree_skb_any(skb); - return -ENOMEM; - } - bp->force_copybreak = 1; - } - - rh = (struct rx_header *) skb->data; - - rh->len = 0; - rh->flags = 0; - - map->skb = skb; - map->mapping = mapping; - - if (src_map != NULL) - src_map->skb = NULL; - - ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ); - if (dest_idx == (B44_RX_RING_SIZE - 1)) - ctrl |= DESC_CTRL_EOT; - - dp = &bp->rx_ring[dest_idx]; - dp->ctrl = cpu_to_le32(ctrl); - dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset); - - if (bp->flags & B44_FLAG_RX_RING_HACK) - b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma, - dest_idx * sizeof(*dp), - DMA_BIDIRECTIONAL); - - return RX_PKT_BUF_SZ; -} - -static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked) -{ - struct dma_desc *src_desc, *dest_desc; - struct ring_info *src_map, *dest_map; - struct rx_header *rh; - int dest_idx; - __le32 ctrl; - - dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1); - dest_desc = &bp->rx_ring[dest_idx]; - dest_map = &bp->rx_buffers[dest_idx]; - src_desc = &bp->rx_ring[src_idx]; - src_map = &bp->rx_buffers[src_idx]; - - dest_map->skb = src_map->skb; - rh = (struct rx_header *) src_map->skb->data; - rh->len = 0; - rh->flags = 0; - dest_map->mapping = src_map->mapping; - - if (bp->flags & B44_FLAG_RX_RING_HACK) - b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma, - src_idx * sizeof(*src_desc), - DMA_BIDIRECTIONAL); - - ctrl = src_desc->ctrl; - if (dest_idx == (B44_RX_RING_SIZE - 1)) - ctrl |= cpu_to_le32(DESC_CTRL_EOT); - else - ctrl &= cpu_to_le32(~DESC_CTRL_EOT); - - dest_desc->ctrl = ctrl; - dest_desc->addr = src_desc->addr; - - src_map->skb = NULL; - - if (bp->flags & B44_FLAG_RX_RING_HACK) - b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma, - dest_idx * sizeof(*dest_desc), - DMA_BIDIRECTIONAL); - - dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping, - RX_PKT_BUF_SZ, - DMA_FROM_DEVICE); -} - -static int b44_rx(struct b44 *bp, int budget) -{ - int received; - u32 cons, prod; - - received = 0; - prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK; - prod /= sizeof(struct dma_desc); - cons = bp->rx_cons; - - while (cons != prod && budget > 0) { - struct ring_info *rp = &bp->rx_buffers[cons]; - struct sk_buff *skb = rp->skb; - dma_addr_t map = rp->mapping; - struct rx_header *rh; - u16 len; - - dma_sync_single_for_cpu(bp->sdev->dma_dev, map, - RX_PKT_BUF_SZ, - DMA_FROM_DEVICE); - rh = (struct rx_header *) skb->data; - len = le16_to_cpu(rh->len); - if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) || - (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) { - drop_it: - b44_recycle_rx(bp, cons, bp->rx_prod); - drop_it_no_recycle: - bp->dev->stats.rx_dropped++; - goto next_pkt; - } - - if (len == 0) { - int i = 0; - - do { - udelay(2); - barrier(); - len = le16_to_cpu(rh->len); - } while (len == 0 && i++ < 5); - if (len == 0) - goto drop_it; - } - - /* Omit CRC. */ - len -= 4; - - if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) { - int skb_size; - skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod); - if (skb_size < 0) - goto drop_it; - dma_unmap_single(bp->sdev->dma_dev, map, - skb_size, DMA_FROM_DEVICE); - /* Leave out rx_header */ - skb_put(skb, len + RX_PKT_OFFSET); - skb_pull(skb, RX_PKT_OFFSET); - } else { - struct sk_buff *copy_skb; - - b44_recycle_rx(bp, cons, bp->rx_prod); - copy_skb = netdev_alloc_skb(bp->dev, len + 2); - if (copy_skb == NULL) - goto drop_it_no_recycle; - - skb_reserve(copy_skb, 2); - skb_put(copy_skb, len); - /* DMA sync done above, copy just the actual packet */ - skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET, - copy_skb->data, len); - skb = copy_skb; - } - skb_checksum_none_assert(skb); - skb->protocol = eth_type_trans(skb, bp->dev); - netif_receive_skb(skb); - received++; - budget--; - next_pkt: - bp->rx_prod = (bp->rx_prod + 1) & - (B44_RX_RING_SIZE - 1); - cons = (cons + 1) & (B44_RX_RING_SIZE - 1); - } - - bp->rx_cons = cons; - bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc)); - - return received; -} - -static int b44_poll(struct napi_struct *napi, int budget) -{ - struct b44 *bp = container_of(napi, struct b44, napi); - int work_done; - unsigned long flags; - - spin_lock_irqsave(&bp->lock, flags); - - if (bp->istat & (ISTAT_TX | ISTAT_TO)) { - /* spin_lock(&bp->tx_lock); */ - b44_tx(bp); - /* spin_unlock(&bp->tx_lock); */ - } - if (bp->istat & ISTAT_RFO) { /* fast recovery, in ~20msec */ - bp->istat &= ~ISTAT_RFO; - b44_disable_ints(bp); - ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */ - b44_init_rings(bp); - b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY); - netif_wake_queue(bp->dev); - } - - spin_unlock_irqrestore(&bp->lock, flags); - - work_done = 0; - if (bp->istat & ISTAT_RX) - work_done += b44_rx(bp, budget); - - if (bp->istat & ISTAT_ERRORS) { - spin_lock_irqsave(&bp->lock, flags); - b44_halt(bp); - b44_init_rings(bp); - b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY); - netif_wake_queue(bp->dev); - spin_unlock_irqrestore(&bp->lock, flags); - work_done = 0; - } - - if (work_done < budget) { - napi_complete(napi); - b44_enable_ints(bp); - } - - return work_done; -} - -static irqreturn_t b44_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct b44 *bp = netdev_priv(dev); - u32 istat, imask; - int handled = 0; - - spin_lock(&bp->lock); - - istat = br32(bp, B44_ISTAT); - imask = br32(bp, B44_IMASK); - - /* The interrupt mask register controls which interrupt bits - * will actually raise an interrupt to the CPU when set by hw/firmware, - * but doesn't mask off the bits. - */ - istat &= imask; - if (istat) { - handled = 1; - - if (unlikely(!netif_running(dev))) { - netdev_info(dev, "late interrupt\n"); - goto irq_ack; - } - - if (napi_schedule_prep(&bp->napi)) { - /* NOTE: These writes are posted by the readback of - * the ISTAT register below. - */ - bp->istat = istat; - __b44_disable_ints(bp); - __napi_schedule(&bp->napi); - } - -irq_ack: - bw32(bp, B44_ISTAT, istat); - br32(bp, B44_ISTAT); - } - spin_unlock(&bp->lock); - return IRQ_RETVAL(handled); -} - -static void b44_tx_timeout(struct net_device *dev) -{ - struct b44 *bp = netdev_priv(dev); - - netdev_err(dev, "transmit timed out, resetting\n"); - - spin_lock_irq(&bp->lock); - - b44_halt(bp); - b44_init_rings(bp); - b44_init_hw(bp, B44_FULL_RESET); - - spin_unlock_irq(&bp->lock); - - b44_enable_ints(bp); - - netif_wake_queue(dev); -} - -static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct b44 *bp = netdev_priv(dev); - int rc = NETDEV_TX_OK; - dma_addr_t mapping; - u32 len, entry, ctrl; - unsigned long flags; - - len = skb->len; - spin_lock_irqsave(&bp->lock, flags); - - /* This is a hard error, log it. */ - if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) { - netif_stop_queue(dev); - netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); - goto err_out; - } - - mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE); - if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) { - struct sk_buff *bounce_skb; - - /* Chip can't handle DMA to/from >1GB, use bounce buffer */ - if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) - dma_unmap_single(bp->sdev->dma_dev, mapping, len, - DMA_TO_DEVICE); - - bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA); - if (!bounce_skb) - goto err_out; - - mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data, - len, DMA_TO_DEVICE); - if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) { - if (!dma_mapping_error(bp->sdev->dma_dev, mapping)) - dma_unmap_single(bp->sdev->dma_dev, mapping, - len, DMA_TO_DEVICE); - dev_kfree_skb_any(bounce_skb); - goto err_out; - } - - skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len); - dev_kfree_skb_any(skb); - skb = bounce_skb; - } - - entry = bp->tx_prod; - bp->tx_buffers[entry].skb = skb; - bp->tx_buffers[entry].mapping = mapping; - - ctrl = (len & DESC_CTRL_LEN); - ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF; - if (entry == (B44_TX_RING_SIZE - 1)) - ctrl |= DESC_CTRL_EOT; - - bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl); - bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset); - - if (bp->flags & B44_FLAG_TX_RING_HACK) - b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma, - entry * sizeof(bp->tx_ring[0]), - DMA_TO_DEVICE); - - entry = NEXT_TX(entry); - - bp->tx_prod = entry; - - wmb(); - - bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc)); - if (bp->flags & B44_FLAG_BUGGY_TXPTR) - bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc)); - if (bp->flags & B44_FLAG_REORDER_BUG) - br32(bp, B44_DMATX_PTR); - - if (TX_BUFFS_AVAIL(bp) < 1) - netif_stop_queue(dev); - -out_unlock: - spin_unlock_irqrestore(&bp->lock, flags); - - return rc; - -err_out: - rc = NETDEV_TX_BUSY; - goto out_unlock; -} - -static int b44_change_mtu(struct net_device *dev, int new_mtu) -{ - struct b44 *bp = netdev_priv(dev); - - if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU) - return -EINVAL; - - if (!netif_running(dev)) { - /* We'll just catch it later when the - * device is up'd. - */ - dev->mtu = new_mtu; - return 0; - } - - spin_lock_irq(&bp->lock); - b44_halt(bp); - dev->mtu = new_mtu; - b44_init_rings(bp); - b44_init_hw(bp, B44_FULL_RESET); - spin_unlock_irq(&bp->lock); - - b44_enable_ints(bp); - - return 0; -} - -/* Free up pending packets in all rx/tx rings. - * - * The chip has been shut down and the driver detached from - * the networking, so no interrupts or new tx packets will - * end up in the driver. bp->lock is not held and we are not - * in an interrupt context and thus may sleep. - */ -static void b44_free_rings(struct b44 *bp) -{ - struct ring_info *rp; - int i; - - for (i = 0; i < B44_RX_RING_SIZE; i++) { - rp = &bp->rx_buffers[i]; - - if (rp->skb == NULL) - continue; - dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ, - DMA_FROM_DEVICE); - dev_kfree_skb_any(rp->skb); - rp->skb = NULL; - } - - /* XXX needs changes once NETIF_F_SG is set... */ - for (i = 0; i < B44_TX_RING_SIZE; i++) { - rp = &bp->tx_buffers[i]; - - if (rp->skb == NULL) - continue; - dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len, - DMA_TO_DEVICE); - dev_kfree_skb_any(rp->skb); - rp->skb = NULL; - } -} - -/* Initialize tx/rx rings for packet processing. - * - * The chip has been shut down and the driver detached from - * the networking, so no interrupts or new tx packets will - * end up in the driver. - */ -static void b44_init_rings(struct b44 *bp) -{ - int i; - - b44_free_rings(bp); - - memset(bp->rx_ring, 0, B44_RX_RING_BYTES); - memset(bp->tx_ring, 0, B44_TX_RING_BYTES); - - if (bp->flags & B44_FLAG_RX_RING_HACK) - dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma, - DMA_TABLE_BYTES, DMA_BIDIRECTIONAL); - - if (bp->flags & B44_FLAG_TX_RING_HACK) - dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma, - DMA_TABLE_BYTES, DMA_TO_DEVICE); - - for (i = 0; i < bp->rx_pending; i++) { - if (b44_alloc_rx_skb(bp, -1, i) < 0) - break; - } -} - -/* - * Must not be invoked with interrupt sources disabled and - * the hardware shutdown down. - */ -static void b44_free_consistent(struct b44 *bp) -{ - kfree(bp->rx_buffers); - bp->rx_buffers = NULL; - kfree(bp->tx_buffers); - bp->tx_buffers = NULL; - if (bp->rx_ring) { - if (bp->flags & B44_FLAG_RX_RING_HACK) { - dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma, - DMA_TABLE_BYTES, DMA_BIDIRECTIONAL); - kfree(bp->rx_ring); - } else - dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES, - bp->rx_ring, bp->rx_ring_dma); - bp->rx_ring = NULL; - bp->flags &= ~B44_FLAG_RX_RING_HACK; - } - if (bp->tx_ring) { - if (bp->flags & B44_FLAG_TX_RING_HACK) { - dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma, - DMA_TABLE_BYTES, DMA_TO_DEVICE); - kfree(bp->tx_ring); - } else - dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES, - bp->tx_ring, bp->tx_ring_dma); - bp->tx_ring = NULL; - bp->flags &= ~B44_FLAG_TX_RING_HACK; - } -} - -/* - * Must not be invoked with interrupt sources disabled and - * the hardware shutdown down. Can sleep. - */ -static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp) -{ - int size; - - size = B44_RX_RING_SIZE * sizeof(struct ring_info); - bp->rx_buffers = kzalloc(size, gfp); - if (!bp->rx_buffers) - goto out_err; - - size = B44_TX_RING_SIZE * sizeof(struct ring_info); - bp-> |