Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: sungem.c,v 1.44.2.22 2002/03/13 01:18:12 davem Exp $ |
| 2 | * sungem.c: Sun GEM ethernet driver. |
| 3 | * |
| 4 | * Copyright (C) 2000, 2001, 2002, 2003 David S. Miller (davem@redhat.com) |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 5 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Support for Apple GMAC and assorted PHYs, WOL, Power Management |
| 7 | * (C) 2001,2002,2003 Benjamin Herrenscmidt (benh@kernel.crashing.org) |
| 8 | * (C) 2004,2005 Benjamin Herrenscmidt, IBM Corp. |
| 9 | * |
| 10 | * NAPI and NETPOLL support |
| 11 | * (C) 2004 by Eric Lemoine (eric.lemoine@gmail.com) |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 12 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | */ |
| 14 | |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 15 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/module.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/fcntl.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/ioport.h> |
| 23 | #include <linux/in.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 24 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/string.h> |
| 26 | #include <linux/delay.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/errno.h> |
| 29 | #include <linux/pci.h> |
Domen Puncer | 1e7f0bd | 2005-06-26 18:22:14 -0400 | [diff] [blame] | 30 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/netdevice.h> |
| 32 | #include <linux/etherdevice.h> |
| 33 | #include <linux/skbuff.h> |
| 34 | #include <linux/mii.h> |
| 35 | #include <linux/ethtool.h> |
| 36 | #include <linux/crc32.h> |
| 37 | #include <linux/random.h> |
| 38 | #include <linux/workqueue.h> |
| 39 | #include <linux/if_vlan.h> |
| 40 | #include <linux/bitops.h> |
Al Viro | d7fe0f2 | 2006-12-03 23:15:30 -0500 | [diff] [blame] | 41 | #include <linux/mm.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 42 | #include <linux/gfp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <asm/io.h> |
| 45 | #include <asm/byteorder.h> |
| 46 | #include <asm/uaccess.h> |
| 47 | #include <asm/irq.h> |
| 48 | |
David S. Miller | dadb830 | 2007-02-28 15:42:50 -0800 | [diff] [blame] | 49 | #ifdef CONFIG_SPARC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <asm/idprom.h> |
Jiri Kosina | 5903417 | 2011-07-29 17:31:16 +0200 | [diff] [blame] | 51 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #endif |
| 53 | |
| 54 | #ifdef CONFIG_PPC_PMAC |
| 55 | #include <asm/pci-bridge.h> |
Jiri Kosina | 5903417 | 2011-07-29 17:31:16 +0200 | [diff] [blame] | 56 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #include <asm/machdep.h> |
| 58 | #include <asm/pmac_feature.h> |
| 59 | #endif |
| 60 | |
David S. Miller | 2bb6984 | 2011-08-14 22:52:04 -0700 | [diff] [blame] | 61 | #include <linux/sungem_phy.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include "sungem.h" |
| 63 | |
| 64 | /* Stripping FCS is causing problems, disabled for now */ |
| 65 | #undef STRIP_FCS |
| 66 | |
| 67 | #define DEFAULT_MSG (NETIF_MSG_DRV | \ |
| 68 | NETIF_MSG_PROBE | \ |
| 69 | NETIF_MSG_LINK) |
| 70 | |
| 71 | #define ADVERTISE_MASK (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \ |
| 72 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \ |
Benjamin Herrenschmidt | 63ea998 | 2007-01-03 18:54:43 -0800 | [diff] [blame] | 73 | SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full | \ |
| 74 | SUPPORTED_Pause | SUPPORTED_Autoneg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | #define DRV_NAME "sungem" |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 77 | #define DRV_VERSION "1.0" |
| 78 | #define DRV_AUTHOR "David S. Miller <davem@redhat.com>" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | static char version[] __devinitdata = |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 81 | DRV_NAME ".c:v" DRV_VERSION " " DRV_AUTHOR "\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | MODULE_AUTHOR(DRV_AUTHOR); |
| 84 | MODULE_DESCRIPTION("Sun GEM Gbit ethernet driver"); |
| 85 | MODULE_LICENSE("GPL"); |
| 86 | |
| 87 | #define GEM_MODULE_NAME "gem" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Alexey Dobriyan | a3aa188 | 2010-01-07 11:58:11 +0000 | [diff] [blame] | 89 | static DEFINE_PCI_DEVICE_TABLE(gem_pci_tbl) = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_GEM, |
| 91 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| 92 | |
| 93 | /* These models only differ from the original GEM in |
| 94 | * that their tx/rx fifos are of a different size and |
| 95 | * they only support 10/100 speeds. -DaveM |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 96 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | * Apple's GMAC does support gigabit on machines with |
| 98 | * the BCM54xx PHYs. -BenH |
| 99 | */ |
| 100 | { PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_RIO_GEM, |
| 101 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| 102 | { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC, |
| 103 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| 104 | { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMACP, |
| 105 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| 106 | { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_UNI_N_GMAC2, |
| 107 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| 108 | { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_K2_GMAC, |
| 109 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
| 110 | { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_SH_SUNGEM, |
| 111 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
Olof Johansson | 7fce260 | 2005-11-13 16:06:48 -0800 | [diff] [blame] | 112 | { PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_IPID2_GMAC, |
| 113 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | {0, } |
| 115 | }; |
| 116 | |
| 117 | MODULE_DEVICE_TABLE(pci, gem_pci_tbl); |
| 118 | |
| 119 | static u16 __phy_read(struct gem *gp, int phy_addr, int reg) |
| 120 | { |
| 121 | u32 cmd; |
| 122 | int limit = 10000; |
| 123 | |
| 124 | cmd = (1 << 30); |
| 125 | cmd |= (2 << 28); |
| 126 | cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD; |
| 127 | cmd |= (reg << 18) & MIF_FRAME_REGAD; |
| 128 | cmd |= (MIF_FRAME_TAMSB); |
| 129 | writel(cmd, gp->regs + MIF_FRAME); |
| 130 | |
Roel Kluin | 46578a69 | 2009-02-02 21:39:02 -0800 | [diff] [blame] | 131 | while (--limit) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | cmd = readl(gp->regs + MIF_FRAME); |
| 133 | if (cmd & MIF_FRAME_TALSB) |
| 134 | break; |
| 135 | |
| 136 | udelay(10); |
| 137 | } |
| 138 | |
| 139 | if (!limit) |
| 140 | cmd = 0xffff; |
| 141 | |
| 142 | return cmd & MIF_FRAME_DATA; |
| 143 | } |
| 144 | |
| 145 | static inline int _phy_read(struct net_device *dev, int mii_id, int reg) |
| 146 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 147 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | return __phy_read(gp, mii_id, reg); |
| 149 | } |
| 150 | |
| 151 | static inline u16 phy_read(struct gem *gp, int reg) |
| 152 | { |
| 153 | return __phy_read(gp, gp->mii_phy_addr, reg); |
| 154 | } |
| 155 | |
| 156 | static void __phy_write(struct gem *gp, int phy_addr, int reg, u16 val) |
| 157 | { |
| 158 | u32 cmd; |
| 159 | int limit = 10000; |
| 160 | |
| 161 | cmd = (1 << 30); |
| 162 | cmd |= (1 << 28); |
| 163 | cmd |= (phy_addr << 23) & MIF_FRAME_PHYAD; |
| 164 | cmd |= (reg << 18) & MIF_FRAME_REGAD; |
| 165 | cmd |= (MIF_FRAME_TAMSB); |
| 166 | cmd |= (val & MIF_FRAME_DATA); |
| 167 | writel(cmd, gp->regs + MIF_FRAME); |
| 168 | |
| 169 | while (limit--) { |
| 170 | cmd = readl(gp->regs + MIF_FRAME); |
| 171 | if (cmd & MIF_FRAME_TALSB) |
| 172 | break; |
| 173 | |
| 174 | udelay(10); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | static inline void _phy_write(struct net_device *dev, int mii_id, int reg, int val) |
| 179 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 180 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | __phy_write(gp, mii_id, reg, val & 0xffff); |
| 182 | } |
| 183 | |
| 184 | static inline void phy_write(struct gem *gp, int reg, u16 val) |
| 185 | { |
| 186 | __phy_write(gp, gp->mii_phy_addr, reg, val); |
| 187 | } |
| 188 | |
| 189 | static inline void gem_enable_ints(struct gem *gp) |
| 190 | { |
| 191 | /* Enable all interrupts but TXDONE */ |
| 192 | writel(GREG_STAT_TXDONE, gp->regs + GREG_IMASK); |
| 193 | } |
| 194 | |
| 195 | static inline void gem_disable_ints(struct gem *gp) |
| 196 | { |
| 197 | /* Disable all interrupts, including TXDONE */ |
| 198 | writel(GREG_STAT_NAPI | GREG_STAT_TXDONE, gp->regs + GREG_IMASK); |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 199 | (void)readl(gp->regs + GREG_IMASK); /* write posting */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | static void gem_get_cell(struct gem *gp) |
| 203 | { |
| 204 | BUG_ON(gp->cell_enabled < 0); |
| 205 | gp->cell_enabled++; |
| 206 | #ifdef CONFIG_PPC_PMAC |
| 207 | if (gp->cell_enabled == 1) { |
| 208 | mb(); |
| 209 | pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 1); |
| 210 | udelay(10); |
| 211 | } |
| 212 | #endif /* CONFIG_PPC_PMAC */ |
| 213 | } |
| 214 | |
| 215 | /* Turn off the chip's clock */ |
| 216 | static void gem_put_cell(struct gem *gp) |
| 217 | { |
| 218 | BUG_ON(gp->cell_enabled <= 0); |
| 219 | gp->cell_enabled--; |
| 220 | #ifdef CONFIG_PPC_PMAC |
| 221 | if (gp->cell_enabled == 0) { |
| 222 | mb(); |
| 223 | pmac_call_feature(PMAC_FTR_GMAC_ENABLE, gp->of_node, 0, 0); |
| 224 | udelay(10); |
| 225 | } |
| 226 | #endif /* CONFIG_PPC_PMAC */ |
| 227 | } |
| 228 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 229 | static inline void gem_netif_stop(struct gem *gp) |
| 230 | { |
| 231 | gp->dev->trans_start = jiffies; /* prevent tx timeout */ |
| 232 | napi_disable(&gp->napi); |
| 233 | netif_tx_disable(gp->dev); |
| 234 | } |
| 235 | |
| 236 | static inline void gem_netif_start(struct gem *gp) |
| 237 | { |
| 238 | /* NOTE: unconditional netif_wake_queue is only |
| 239 | * appropriate so long as all callers are assured to |
| 240 | * have free tx slots. |
| 241 | */ |
| 242 | netif_wake_queue(gp->dev); |
| 243 | napi_enable(&gp->napi); |
| 244 | } |
| 245 | |
| 246 | static void gem_schedule_reset(struct gem *gp) |
| 247 | { |
| 248 | gp->reset_task_pending = 1; |
| 249 | schedule_work(&gp->reset_task); |
| 250 | } |
| 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | static void gem_handle_mif_event(struct gem *gp, u32 reg_val, u32 changed_bits) |
| 253 | { |
| 254 | if (netif_msg_intr(gp)) |
| 255 | printk(KERN_DEBUG "%s: mif interrupt\n", gp->dev->name); |
| 256 | } |
| 257 | |
| 258 | static int gem_pcs_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 259 | { |
| 260 | u32 pcs_istat = readl(gp->regs + PCS_ISTAT); |
| 261 | u32 pcs_miistat; |
| 262 | |
| 263 | if (netif_msg_intr(gp)) |
| 264 | printk(KERN_DEBUG "%s: pcs interrupt, pcs_istat: 0x%x\n", |
| 265 | gp->dev->name, pcs_istat); |
| 266 | |
| 267 | if (!(pcs_istat & PCS_ISTAT_LSC)) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 268 | netdev_err(dev, "PCS irq but no link status change???\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | /* The link status bit latches on zero, so you must |
| 273 | * read it twice in such a case to see a transition |
| 274 | * to the link being up. |
| 275 | */ |
| 276 | pcs_miistat = readl(gp->regs + PCS_MIISTAT); |
| 277 | if (!(pcs_miistat & PCS_MIISTAT_LS)) |
| 278 | pcs_miistat |= |
| 279 | (readl(gp->regs + PCS_MIISTAT) & |
| 280 | PCS_MIISTAT_LS); |
| 281 | |
| 282 | if (pcs_miistat & PCS_MIISTAT_ANC) { |
| 283 | /* The remote-fault indication is only valid |
| 284 | * when autoneg has completed. |
| 285 | */ |
| 286 | if (pcs_miistat & PCS_MIISTAT_RF) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 287 | netdev_info(dev, "PCS AutoNEG complete, RemoteFault\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | else |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 289 | netdev_info(dev, "PCS AutoNEG complete\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | if (pcs_miistat & PCS_MIISTAT_LS) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 293 | netdev_info(dev, "PCS link is now up\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | netif_carrier_on(gp->dev); |
| 295 | } else { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 296 | netdev_info(dev, "PCS link is now down\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | netif_carrier_off(gp->dev); |
| 298 | /* If this happens and the link timer is not running, |
| 299 | * reset so we re-negotiate. |
| 300 | */ |
| 301 | if (!timer_pending(&gp->link_timer)) |
| 302 | return 1; |
| 303 | } |
| 304 | |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | static int gem_txmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 309 | { |
| 310 | u32 txmac_stat = readl(gp->regs + MAC_TXSTAT); |
| 311 | |
| 312 | if (netif_msg_intr(gp)) |
| 313 | printk(KERN_DEBUG "%s: txmac interrupt, txmac_stat: 0x%x\n", |
| 314 | gp->dev->name, txmac_stat); |
| 315 | |
| 316 | /* Defer timer expiration is quite normal, |
| 317 | * don't even log the event. |
| 318 | */ |
| 319 | if ((txmac_stat & MAC_TXSTAT_DTE) && |
| 320 | !(txmac_stat & ~MAC_TXSTAT_DTE)) |
| 321 | return 0; |
| 322 | |
| 323 | if (txmac_stat & MAC_TXSTAT_URUN) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 324 | netdev_err(dev, "TX MAC xmit underrun\n"); |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 325 | dev->stats.tx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | if (txmac_stat & MAC_TXSTAT_MPE) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 329 | netdev_err(dev, "TX MAC max packet size error\n"); |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 330 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | /* The rest are all cases of one of the 16-bit TX |
| 334 | * counters expiring. |
| 335 | */ |
| 336 | if (txmac_stat & MAC_TXSTAT_NCE) |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 337 | dev->stats.collisions += 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | if (txmac_stat & MAC_TXSTAT_ECE) { |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 340 | dev->stats.tx_aborted_errors += 0x10000; |
| 341 | dev->stats.collisions += 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | if (txmac_stat & MAC_TXSTAT_LCE) { |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 345 | dev->stats.tx_aborted_errors += 0x10000; |
| 346 | dev->stats.collisions += 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | /* We do not keep track of MAC_TXSTAT_FCE and |
| 350 | * MAC_TXSTAT_PCE events. |
| 351 | */ |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | /* When we get a RX fifo overflow, the RX unit in GEM is probably hung |
| 356 | * so we do the following. |
| 357 | * |
| 358 | * If any part of the reset goes wrong, we return 1 and that causes the |
| 359 | * whole chip to be reset. |
| 360 | */ |
| 361 | static int gem_rxmac_reset(struct gem *gp) |
| 362 | { |
| 363 | struct net_device *dev = gp->dev; |
| 364 | int limit, i; |
| 365 | u64 desc_dma; |
| 366 | u32 val; |
| 367 | |
| 368 | /* First, reset & disable MAC RX. */ |
| 369 | writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST); |
| 370 | for (limit = 0; limit < 5000; limit++) { |
| 371 | if (!(readl(gp->regs + MAC_RXRST) & MAC_RXRST_CMD)) |
| 372 | break; |
| 373 | udelay(10); |
| 374 | } |
| 375 | if (limit == 5000) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 376 | netdev_err(dev, "RX MAC will not reset, resetting whole chip\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | return 1; |
| 378 | } |
| 379 | |
| 380 | writel(gp->mac_rx_cfg & ~MAC_RXCFG_ENAB, |
| 381 | gp->regs + MAC_RXCFG); |
| 382 | for (limit = 0; limit < 5000; limit++) { |
| 383 | if (!(readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB)) |
| 384 | break; |
| 385 | udelay(10); |
| 386 | } |
| 387 | if (limit == 5000) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 388 | netdev_err(dev, "RX MAC will not disable, resetting whole chip\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | return 1; |
| 390 | } |
| 391 | |
| 392 | /* Second, disable RX DMA. */ |
| 393 | writel(0, gp->regs + RXDMA_CFG); |
| 394 | for (limit = 0; limit < 5000; limit++) { |
| 395 | if (!(readl(gp->regs + RXDMA_CFG) & RXDMA_CFG_ENABLE)) |
| 396 | break; |
| 397 | udelay(10); |
| 398 | } |
| 399 | if (limit == 5000) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 400 | netdev_err(dev, "RX DMA will not disable, resetting whole chip\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | return 1; |
| 402 | } |
| 403 | |
| 404 | udelay(5000); |
| 405 | |
| 406 | /* Execute RX reset command. */ |
| 407 | writel(gp->swrst_base | GREG_SWRST_RXRST, |
| 408 | gp->regs + GREG_SWRST); |
| 409 | for (limit = 0; limit < 5000; limit++) { |
| 410 | if (!(readl(gp->regs + GREG_SWRST) & GREG_SWRST_RXRST)) |
| 411 | break; |
| 412 | udelay(10); |
| 413 | } |
| 414 | if (limit == 5000) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 415 | netdev_err(dev, "RX reset command will not execute, resetting whole chip\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | return 1; |
| 417 | } |
| 418 | |
| 419 | /* Refresh the RX ring. */ |
| 420 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 421 | struct gem_rxd *rxd = &gp->init_block->rxd[i]; |
| 422 | |
| 423 | if (gp->rx_skbs[i] == NULL) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 424 | netdev_err(dev, "Parts of RX ring empty, resetting whole chip\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | return 1; |
| 426 | } |
| 427 | |
| 428 | rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); |
| 429 | } |
| 430 | gp->rx_new = gp->rx_old = 0; |
| 431 | |
| 432 | /* Now we must reprogram the rest of RX unit. */ |
| 433 | desc_dma = (u64) gp->gblock_dvma; |
| 434 | desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd)); |
| 435 | writel(desc_dma >> 32, gp->regs + RXDMA_DBHI); |
| 436 | writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW); |
| 437 | writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); |
| 438 | val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) | |
| 439 | ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128); |
| 440 | writel(val, gp->regs + RXDMA_CFG); |
| 441 | if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN) |
| 442 | writel(((5 & RXDMA_BLANK_IPKTS) | |
| 443 | ((8 << 12) & RXDMA_BLANK_ITIME)), |
| 444 | gp->regs + RXDMA_BLANK); |
| 445 | else |
| 446 | writel(((5 & RXDMA_BLANK_IPKTS) | |
| 447 | ((4 << 12) & RXDMA_BLANK_ITIME)), |
| 448 | gp->regs + RXDMA_BLANK); |
| 449 | val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF); |
| 450 | val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON); |
| 451 | writel(val, gp->regs + RXDMA_PTHRESH); |
| 452 | val = readl(gp->regs + RXDMA_CFG); |
| 453 | writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); |
| 454 | writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK); |
| 455 | val = readl(gp->regs + MAC_RXCFG); |
| 456 | writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); |
| 457 | |
| 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | static int gem_rxmac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 462 | { |
| 463 | u32 rxmac_stat = readl(gp->regs + MAC_RXSTAT); |
| 464 | int ret = 0; |
| 465 | |
| 466 | if (netif_msg_intr(gp)) |
| 467 | printk(KERN_DEBUG "%s: rxmac interrupt, rxmac_stat: 0x%x\n", |
| 468 | gp->dev->name, rxmac_stat); |
| 469 | |
| 470 | if (rxmac_stat & MAC_RXSTAT_OFLW) { |
| 471 | u32 smac = readl(gp->regs + MAC_SMACHINE); |
| 472 | |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 473 | netdev_err(dev, "RX MAC fifo overflow smac[%08x]\n", smac); |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 474 | dev->stats.rx_over_errors++; |
| 475 | dev->stats.rx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | ret = gem_rxmac_reset(gp); |
| 478 | } |
| 479 | |
| 480 | if (rxmac_stat & MAC_RXSTAT_ACE) |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 481 | dev->stats.rx_frame_errors += 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | if (rxmac_stat & MAC_RXSTAT_CCE) |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 484 | dev->stats.rx_crc_errors += 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
| 486 | if (rxmac_stat & MAC_RXSTAT_LCE) |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 487 | dev->stats.rx_length_errors += 0x10000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
| 489 | /* We do not track MAC_RXSTAT_FCE and MAC_RXSTAT_VCE |
| 490 | * events. |
| 491 | */ |
| 492 | return ret; |
| 493 | } |
| 494 | |
| 495 | static int gem_mac_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 496 | { |
| 497 | u32 mac_cstat = readl(gp->regs + MAC_CSTAT); |
| 498 | |
| 499 | if (netif_msg_intr(gp)) |
| 500 | printk(KERN_DEBUG "%s: mac interrupt, mac_cstat: 0x%x\n", |
| 501 | gp->dev->name, mac_cstat); |
| 502 | |
| 503 | /* This interrupt is just for pause frame and pause |
| 504 | * tracking. It is useful for diagnostics and debug |
| 505 | * but probably by default we will mask these events. |
| 506 | */ |
| 507 | if (mac_cstat & MAC_CSTAT_PS) |
| 508 | gp->pause_entered++; |
| 509 | |
| 510 | if (mac_cstat & MAC_CSTAT_PRCV) |
| 511 | gp->pause_last_time_recvd = (mac_cstat >> 16); |
| 512 | |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | static int gem_mif_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 517 | { |
| 518 | u32 mif_status = readl(gp->regs + MIF_STATUS); |
| 519 | u32 reg_val, changed_bits; |
| 520 | |
| 521 | reg_val = (mif_status & MIF_STATUS_DATA) >> 16; |
| 522 | changed_bits = (mif_status & MIF_STATUS_STAT); |
| 523 | |
| 524 | gem_handle_mif_event(gp, reg_val, changed_bits); |
| 525 | |
| 526 | return 0; |
| 527 | } |
| 528 | |
| 529 | static int gem_pci_interrupt(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 530 | { |
| 531 | u32 pci_estat = readl(gp->regs + GREG_PCIESTAT); |
| 532 | |
| 533 | if (gp->pdev->vendor == PCI_VENDOR_ID_SUN && |
| 534 | gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 535 | netdev_err(dev, "PCI error [%04x]", pci_estat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
| 537 | if (pci_estat & GREG_PCIESTAT_BADACK) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 538 | pr_cont(" <No ACK64# during ABS64 cycle>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | if (pci_estat & GREG_PCIESTAT_DTRTO) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 540 | pr_cont(" <Delayed transaction timeout>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | if (pci_estat & GREG_PCIESTAT_OTHER) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 542 | pr_cont(" <other>"); |
| 543 | pr_cont("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | } else { |
| 545 | pci_estat |= GREG_PCIESTAT_OTHER; |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 546 | netdev_err(dev, "PCI error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | if (pci_estat & GREG_PCIESTAT_OTHER) { |
| 550 | u16 pci_cfg_stat; |
| 551 | |
| 552 | /* Interrogate PCI config space for the |
| 553 | * true cause. |
| 554 | */ |
| 555 | pci_read_config_word(gp->pdev, PCI_STATUS, |
| 556 | &pci_cfg_stat); |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 557 | netdev_err(dev, "Read PCI cfg space status [%04x]\n", |
| 558 | pci_cfg_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | if (pci_cfg_stat & PCI_STATUS_PARITY) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 560 | netdev_err(dev, "PCI parity error detected\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | if (pci_cfg_stat & PCI_STATUS_SIG_TARGET_ABORT) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 562 | netdev_err(dev, "PCI target abort\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | if (pci_cfg_stat & PCI_STATUS_REC_TARGET_ABORT) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 564 | netdev_err(dev, "PCI master acks target abort\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | if (pci_cfg_stat & PCI_STATUS_REC_MASTER_ABORT) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 566 | netdev_err(dev, "PCI master abort\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | if (pci_cfg_stat & PCI_STATUS_SIG_SYSTEM_ERROR) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 568 | netdev_err(dev, "PCI system error SERR#\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | if (pci_cfg_stat & PCI_STATUS_DETECTED_PARITY) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 570 | netdev_err(dev, "PCI parity error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
| 572 | /* Write the error bits back to clear them. */ |
| 573 | pci_cfg_stat &= (PCI_STATUS_PARITY | |
| 574 | PCI_STATUS_SIG_TARGET_ABORT | |
| 575 | PCI_STATUS_REC_TARGET_ABORT | |
| 576 | PCI_STATUS_REC_MASTER_ABORT | |
| 577 | PCI_STATUS_SIG_SYSTEM_ERROR | |
| 578 | PCI_STATUS_DETECTED_PARITY); |
| 579 | pci_write_config_word(gp->pdev, |
| 580 | PCI_STATUS, pci_cfg_stat); |
| 581 | } |
| 582 | |
| 583 | /* For all PCI errors, we should reset the chip. */ |
| 584 | return 1; |
| 585 | } |
| 586 | |
| 587 | /* All non-normal interrupt conditions get serviced here. |
| 588 | * Returns non-zero if we should just exit the interrupt |
| 589 | * handler right now (ie. if we reset the card which invalidates |
| 590 | * all of the other original irq status bits). |
| 591 | */ |
| 592 | static int gem_abnormal_irq(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 593 | { |
| 594 | if (gem_status & GREG_STAT_RXNOBUF) { |
| 595 | /* Frame arrived, no free RX buffers available. */ |
| 596 | if (netif_msg_rx_err(gp)) |
| 597 | printk(KERN_DEBUG "%s: no buffer for rx frame\n", |
| 598 | gp->dev->name); |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 599 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | if (gem_status & GREG_STAT_RXTAGERR) { |
| 603 | /* corrupt RX tag framing */ |
| 604 | if (netif_msg_rx_err(gp)) |
| 605 | printk(KERN_DEBUG "%s: corrupt rx tag framing\n", |
| 606 | gp->dev->name); |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 607 | dev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 609 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | if (gem_status & GREG_STAT_PCS) { |
| 613 | if (gem_pcs_interrupt(dev, gp, gem_status)) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 614 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | if (gem_status & GREG_STAT_TXMAC) { |
| 618 | if (gem_txmac_interrupt(dev, gp, gem_status)) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 619 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | if (gem_status & GREG_STAT_RXMAC) { |
| 623 | if (gem_rxmac_interrupt(dev, gp, gem_status)) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 624 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | } |
| 626 | |
| 627 | if (gem_status & GREG_STAT_MAC) { |
| 628 | if (gem_mac_interrupt(dev, gp, gem_status)) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 629 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | } |
| 631 | |
| 632 | if (gem_status & GREG_STAT_MIF) { |
| 633 | if (gem_mif_interrupt(dev, gp, gem_status)) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 634 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | } |
| 636 | |
| 637 | if (gem_status & GREG_STAT_PCIERR) { |
| 638 | if (gem_pci_interrupt(dev, gp, gem_status)) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 639 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | } |
| 641 | |
| 642 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | |
| 645 | static __inline__ void gem_tx(struct net_device *dev, struct gem *gp, u32 gem_status) |
| 646 | { |
| 647 | int entry, limit; |
| 648 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | entry = gp->tx_old; |
| 650 | limit = ((gem_status & GREG_STAT_TXNR) >> GREG_STAT_TXNR_SHIFT); |
| 651 | while (entry != limit) { |
| 652 | struct sk_buff *skb; |
| 653 | struct gem_txd *txd; |
| 654 | dma_addr_t dma_addr; |
| 655 | u32 dma_len; |
| 656 | int frag; |
| 657 | |
| 658 | if (netif_msg_tx_done(gp)) |
| 659 | printk(KERN_DEBUG "%s: tx done, slot %d\n", |
| 660 | gp->dev->name, entry); |
| 661 | skb = gp->tx_skbs[entry]; |
| 662 | if (skb_shinfo(skb)->nr_frags) { |
| 663 | int last = entry + skb_shinfo(skb)->nr_frags; |
| 664 | int walk = entry; |
| 665 | int incomplete = 0; |
| 666 | |
| 667 | last &= (TX_RING_SIZE - 1); |
| 668 | for (;;) { |
| 669 | walk = NEXT_TX(walk); |
| 670 | if (walk == limit) |
| 671 | incomplete = 1; |
| 672 | if (walk == last) |
| 673 | break; |
| 674 | } |
| 675 | if (incomplete) |
| 676 | break; |
| 677 | } |
| 678 | gp->tx_skbs[entry] = NULL; |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 679 | dev->stats.tx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | |
| 681 | for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) { |
| 682 | txd = &gp->init_block->txd[entry]; |
| 683 | |
| 684 | dma_addr = le64_to_cpu(txd->buffer); |
| 685 | dma_len = le64_to_cpu(txd->control_word) & TXDCTRL_BUFSZ; |
| 686 | |
| 687 | pci_unmap_page(gp->pdev, dma_addr, dma_len, PCI_DMA_TODEVICE); |
| 688 | entry = NEXT_TX(entry); |
| 689 | } |
| 690 | |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 691 | dev->stats.tx_packets++; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 692 | dev_kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | } |
| 694 | gp->tx_old = entry; |
| 695 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 696 | /* Need to make the tx_old update visible to gem_start_xmit() |
| 697 | * before checking for netif_queue_stopped(). Without the |
| 698 | * memory barrier, there is a small possibility that gem_start_xmit() |
| 699 | * will miss it and cause the queue to be stopped forever. |
| 700 | */ |
| 701 | smp_mb(); |
| 702 | |
| 703 | if (unlikely(netif_queue_stopped(dev) && |
| 704 | TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1))) { |
| 705 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
| 706 | |
| 707 | __netif_tx_lock(txq, smp_processor_id()); |
| 708 | if (netif_queue_stopped(dev) && |
| 709 | TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) |
| 710 | netif_wake_queue(dev); |
| 711 | __netif_tx_unlock(txq); |
| 712 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | static __inline__ void gem_post_rxds(struct gem *gp, int limit) |
| 716 | { |
| 717 | int cluster_start, curr, count, kick; |
| 718 | |
| 719 | cluster_start = curr = (gp->rx_new & ~(4 - 1)); |
| 720 | count = 0; |
| 721 | kick = -1; |
| 722 | wmb(); |
| 723 | while (curr != limit) { |
| 724 | curr = NEXT_RX(curr); |
| 725 | if (++count == 4) { |
| 726 | struct gem_rxd *rxd = |
| 727 | &gp->init_block->rxd[cluster_start]; |
| 728 | for (;;) { |
| 729 | rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); |
| 730 | rxd++; |
| 731 | cluster_start = NEXT_RX(cluster_start); |
| 732 | if (cluster_start == curr) |
| 733 | break; |
| 734 | } |
| 735 | kick = curr; |
| 736 | count = 0; |
| 737 | } |
| 738 | } |
| 739 | if (kick >= 0) { |
| 740 | mb(); |
| 741 | writel(kick, gp->regs + RXDMA_KICK); |
| 742 | } |
| 743 | } |
| 744 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 745 | #define ALIGNED_RX_SKB_ADDR(addr) \ |
| 746 | ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr)) |
| 747 | static __inline__ struct sk_buff *gem_alloc_skb(struct net_device *dev, int size, |
| 748 | gfp_t gfp_flags) |
| 749 | { |
| 750 | struct sk_buff *skb = alloc_skb(size + 64, gfp_flags); |
| 751 | |
| 752 | if (likely(skb)) { |
| 753 | unsigned long offset = ALIGNED_RX_SKB_ADDR(skb->data); |
| 754 | skb_reserve(skb, offset); |
| 755 | skb->dev = dev; |
| 756 | } |
| 757 | return skb; |
| 758 | } |
| 759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | static int gem_rx(struct gem *gp, int work_to_do) |
| 761 | { |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 762 | struct net_device *dev = gp->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | int entry, drops, work_done = 0; |
| 764 | u32 done; |
Al Viro | 439104b | 2007-12-17 06:48:04 +0000 | [diff] [blame] | 765 | __sum16 csum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
| 767 | if (netif_msg_rx_status(gp)) |
| 768 | printk(KERN_DEBUG "%s: rx interrupt, done: %d, rx_new: %d\n", |
| 769 | gp->dev->name, readl(gp->regs + RXDMA_DONE), gp->rx_new); |
| 770 | |
| 771 | entry = gp->rx_new; |
| 772 | drops = 0; |
| 773 | done = readl(gp->regs + RXDMA_DONE); |
| 774 | for (;;) { |
| 775 | struct gem_rxd *rxd = &gp->init_block->rxd[entry]; |
| 776 | struct sk_buff *skb; |
Al Viro | 439104b | 2007-12-17 06:48:04 +0000 | [diff] [blame] | 777 | u64 status = le64_to_cpu(rxd->status_word); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | dma_addr_t dma_addr; |
| 779 | int len; |
| 780 | |
| 781 | if ((status & RXDCTRL_OWN) != 0) |
| 782 | break; |
| 783 | |
| 784 | if (work_done >= RX_RING_SIZE || work_done >= work_to_do) |
| 785 | break; |
| 786 | |
| 787 | /* When writing back RX descriptor, GEM writes status |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 788 | * then buffer address, possibly in separate transactions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | * If we don't wait for the chip to write both, we could |
| 790 | * post a new buffer to this descriptor then have GEM spam |
| 791 | * on the buffer address. We sync on the RX completion |
| 792 | * register to prevent this from happening. |
| 793 | */ |
| 794 | if (entry == done) { |
| 795 | done = readl(gp->regs + RXDMA_DONE); |
| 796 | if (entry == done) |
| 797 | break; |
| 798 | } |
| 799 | |
| 800 | /* We can now account for the work we're about to do */ |
| 801 | work_done++; |
| 802 | |
| 803 | skb = gp->rx_skbs[entry]; |
| 804 | |
| 805 | len = (status & RXDCTRL_BUFSZ) >> 16; |
| 806 | if ((len < ETH_ZLEN) || (status & RXDCTRL_BAD)) { |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 807 | dev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | if (len < ETH_ZLEN) |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 809 | dev->stats.rx_length_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | if (len & RXDCTRL_BAD) |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 811 | dev->stats.rx_crc_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | |
| 813 | /* We'll just return it to GEM. */ |
| 814 | drop_it: |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 815 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | goto next; |
| 817 | } |
| 818 | |
Al Viro | 439104b | 2007-12-17 06:48:04 +0000 | [diff] [blame] | 819 | dma_addr = le64_to_cpu(rxd->buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | if (len > RX_COPY_THRESHOLD) { |
| 821 | struct sk_buff *new_skb; |
| 822 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 823 | new_skb = gem_alloc_skb(dev, RX_BUF_ALLOC_SIZE(gp), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | if (new_skb == NULL) { |
| 825 | drops++; |
| 826 | goto drop_it; |
| 827 | } |
| 828 | pci_unmap_page(gp->pdev, dma_addr, |
| 829 | RX_BUF_ALLOC_SIZE(gp), |
| 830 | PCI_DMA_FROMDEVICE); |
| 831 | gp->rx_skbs[entry] = new_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | skb_put(new_skb, (gp->rx_buf_sz + RX_OFFSET)); |
| 833 | rxd->buffer = cpu_to_le64(pci_map_page(gp->pdev, |
| 834 | virt_to_page(new_skb->data), |
| 835 | offset_in_page(new_skb->data), |
| 836 | RX_BUF_ALLOC_SIZE(gp), |
| 837 | PCI_DMA_FROMDEVICE)); |
| 838 | skb_reserve(new_skb, RX_OFFSET); |
| 839 | |
| 840 | /* Trim the original skb for the netif. */ |
| 841 | skb_trim(skb, len); |
| 842 | } else { |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 843 | struct sk_buff *copy_skb = netdev_alloc_skb(dev, len + 2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
| 845 | if (copy_skb == NULL) { |
| 846 | drops++; |
| 847 | goto drop_it; |
| 848 | } |
| 849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | skb_reserve(copy_skb, 2); |
| 851 | skb_put(copy_skb, len); |
| 852 | pci_dma_sync_single_for_cpu(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE); |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 853 | skb_copy_from_linear_data(skb, copy_skb->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | pci_dma_sync_single_for_device(gp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE); |
| 855 | |
| 856 | /* We'll reuse the original ring buffer. */ |
| 857 | skb = copy_skb; |
| 858 | } |
| 859 | |
Al Viro | 439104b | 2007-12-17 06:48:04 +0000 | [diff] [blame] | 860 | csum = (__force __sum16)htons((status & RXDCTRL_TCPCSUM) ^ 0xffff); |
| 861 | skb->csum = csum_unfold(csum); |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 862 | skb->ip_summed = CHECKSUM_COMPLETE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | skb->protocol = eth_type_trans(skb, gp->dev); |
| 864 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 865 | napi_gro_receive(&gp->napi, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 867 | dev->stats.rx_packets++; |
| 868 | dev->stats.rx_bytes += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
| 870 | next: |
| 871 | entry = NEXT_RX(entry); |
| 872 | } |
| 873 | |
| 874 | gem_post_rxds(gp, entry); |
| 875 | |
| 876 | gp->rx_new = entry; |
| 877 | |
| 878 | if (drops) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 879 | netdev_info(gp->dev, "Memory squeeze, deferring packet\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
| 881 | return work_done; |
| 882 | } |
| 883 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 884 | static int gem_poll(struct napi_struct *napi, int budget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 886 | struct gem *gp = container_of(napi, struct gem, napi); |
| 887 | struct net_device *dev = gp->dev; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 888 | int work_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 890 | work_done = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | do { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | /* Handle anomalies */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 893 | if (unlikely(gp->status & GREG_STAT_ABNORMAL)) { |
| 894 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
| 895 | int reset; |
| 896 | |
| 897 | /* We run the abnormal interrupt handling code with |
| 898 | * the Tx lock. It only resets the Rx portion of the |
| 899 | * chip, but we need to guard it against DMA being |
| 900 | * restarted by the link poll timer |
| 901 | */ |
| 902 | __netif_tx_lock(txq, smp_processor_id()); |
| 903 | reset = gem_abnormal_irq(dev, gp, gp->status); |
| 904 | __netif_tx_unlock(txq); |
| 905 | if (reset) { |
| 906 | gem_schedule_reset(gp); |
| 907 | napi_complete(napi); |
| 908 | return work_done; |
| 909 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | } |
| 911 | |
| 912 | /* Run TX completion thread */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | gem_tx(dev, gp, gp->status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 915 | /* Run RX thread. We don't use any locking here, |
| 916 | * code willing to do bad things - like cleaning the |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 917 | * rx ring - must call napi_disable(), which |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | * schedule_timeout()'s if polling is already disabled. |
| 919 | */ |
David S. Miller | da990a2 | 2008-03-23 03:35:12 -0700 | [diff] [blame] | 920 | work_done += gem_rx(gp, budget - work_done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 922 | if (work_done >= budget) |
| 923 | return work_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | gp->status = readl(gp->regs + GREG_STAT); |
| 926 | } while (gp->status & GREG_STAT_NAPI); |
| 927 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 928 | napi_complete(napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | gem_enable_ints(gp); |
| 930 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 931 | return work_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | } |
| 933 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 934 | static irqreturn_t gem_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | { |
| 936 | struct net_device *dev = dev_id; |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 937 | struct gem *gp = netdev_priv(dev); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 938 | |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 939 | if (napi_schedule_prep(&gp->napi)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | u32 gem_status = readl(gp->regs + GREG_STAT); |
| 941 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 942 | if (unlikely(gem_status == 0)) { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 943 | napi_enable(&gp->napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | return IRQ_NONE; |
| 945 | } |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 946 | if (netif_msg_intr(gp)) |
| 947 | printk(KERN_DEBUG "%s: gem_interrupt() gem_status: 0x%x\n", |
| 948 | gp->dev->name, gem_status); |
| 949 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | gp->status = gem_status; |
| 951 | gem_disable_ints(gp); |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 952 | __napi_schedule(&gp->napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | } |
| 954 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | /* If polling was disabled at the time we received that |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 956 | * interrupt, we may return IRQ_HANDLED here while we |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | * should return IRQ_NONE. No big deal... |
| 958 | */ |
| 959 | return IRQ_HANDLED; |
| 960 | } |
| 961 | |
| 962 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 963 | static void gem_poll_controller(struct net_device *dev) |
| 964 | { |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 965 | struct gem *gp = netdev_priv(dev); |
| 966 | |
| 967 | disable_irq(gp->pdev->irq); |
| 968 | gem_interrupt(gp->pdev->irq, dev); |
| 969 | enable_irq(gp->pdev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } |
| 971 | #endif |
| 972 | |
| 973 | static void gem_tx_timeout(struct net_device *dev) |
| 974 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 975 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 977 | netdev_err(dev, "transmit timed out, resetting\n"); |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 978 | |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 979 | netdev_err(dev, "TX_STATE[%08x:%08x:%08x]\n", |
| 980 | readl(gp->regs + TXDMA_CFG), |
| 981 | readl(gp->regs + MAC_TXSTAT), |
| 982 | readl(gp->regs + MAC_TXCFG)); |
| 983 | netdev_err(dev, "RX_STATE[%08x:%08x:%08x]\n", |
| 984 | readl(gp->regs + RXDMA_CFG), |
| 985 | readl(gp->regs + MAC_RXSTAT), |
| 986 | readl(gp->regs + MAC_RXCFG)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 988 | gem_schedule_reset(gp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | } |
| 990 | |
| 991 | static __inline__ int gem_intme(int entry) |
| 992 | { |
| 993 | /* Algorithm: IRQ every 1/2 of descriptors. */ |
| 994 | if (!(entry & ((TX_RING_SIZE>>1)-1))) |
| 995 | return 1; |
| 996 | |
| 997 | return 0; |
| 998 | } |
| 999 | |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 1000 | static netdev_tx_t gem_start_xmit(struct sk_buff *skb, |
| 1001 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 1003 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | int entry; |
| 1005 | u64 ctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | |
| 1007 | ctrl = 0; |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1008 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
Michał Mirosław | 0d0b167 | 2010-12-14 15:24:08 +0000 | [diff] [blame] | 1009 | const u64 csum_start_off = skb_checksum_start_offset(skb); |
Arnaldo Carvalho de Melo | ea2ae17 | 2007-04-25 17:55:53 -0700 | [diff] [blame] | 1010 | const u64 csum_stuff_off = csum_start_off + skb->csum_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
| 1012 | ctrl = (TXDCTRL_CENAB | |
| 1013 | (csum_start_off << 15) | |
| 1014 | (csum_stuff_off << 21)); |
| 1015 | } |
| 1016 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1017 | if (unlikely(TX_BUFFS_AVAIL(gp) <= (skb_shinfo(skb)->nr_frags + 1))) { |
| 1018 | /* This is a hard error, log it. */ |
| 1019 | if (!netif_queue_stopped(dev)) { |
| 1020 | netif_stop_queue(dev); |
| 1021 | netdev_err(dev, "BUG! Tx Ring full when queue awake!\n"); |
| 1022 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | return NETDEV_TX_BUSY; |
| 1024 | } |
| 1025 | |
| 1026 | entry = gp->tx_new; |
| 1027 | gp->tx_skbs[entry] = skb; |
| 1028 | |
| 1029 | if (skb_shinfo(skb)->nr_frags == 0) { |
| 1030 | struct gem_txd *txd = &gp->init_block->txd[entry]; |
| 1031 | dma_addr_t mapping; |
| 1032 | u32 len; |
| 1033 | |
| 1034 | len = skb->len; |
| 1035 | mapping = pci_map_page(gp->pdev, |
| 1036 | virt_to_page(skb->data), |
| 1037 | offset_in_page(skb->data), |
| 1038 | len, PCI_DMA_TODEVICE); |
| 1039 | ctrl |= TXDCTRL_SOF | TXDCTRL_EOF | len; |
| 1040 | if (gem_intme(entry)) |
| 1041 | ctrl |= TXDCTRL_INTME; |
| 1042 | txd->buffer = cpu_to_le64(mapping); |
| 1043 | wmb(); |
| 1044 | txd->control_word = cpu_to_le64(ctrl); |
| 1045 | entry = NEXT_TX(entry); |
| 1046 | } else { |
| 1047 | struct gem_txd *txd; |
| 1048 | u32 first_len; |
| 1049 | u64 intme; |
| 1050 | dma_addr_t first_mapping; |
| 1051 | int frag, first_entry = entry; |
| 1052 | |
| 1053 | intme = 0; |
| 1054 | if (gem_intme(entry)) |
| 1055 | intme |= TXDCTRL_INTME; |
| 1056 | |
| 1057 | /* We must give this initial chunk to the device last. |
| 1058 | * Otherwise we could race with the device. |
| 1059 | */ |
| 1060 | first_len = skb_headlen(skb); |
| 1061 | first_mapping = pci_map_page(gp->pdev, virt_to_page(skb->data), |
| 1062 | offset_in_page(skb->data), |
| 1063 | first_len, PCI_DMA_TODEVICE); |
| 1064 | entry = NEXT_TX(entry); |
| 1065 | |
| 1066 | for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) { |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 1067 | const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | u32 len; |
| 1069 | dma_addr_t mapping; |
| 1070 | u64 this_ctrl; |
| 1071 | |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame] | 1072 | len = skb_frag_size(this_frag); |
Ian Campbell | 4fee78b | 2011-09-21 21:53:21 +0000 | [diff] [blame] | 1073 | mapping = skb_frag_dma_map(&gp->pdev->dev, this_frag, |
Ian Campbell | 5d6bcdf | 2011-10-06 11:10:48 +0100 | [diff] [blame] | 1074 | 0, len, DMA_TO_DEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | this_ctrl = ctrl; |
| 1076 | if (frag == skb_shinfo(skb)->nr_frags - 1) |
| 1077 | this_ctrl |= TXDCTRL_EOF; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1078 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | txd = &gp->init_block->txd[entry]; |
| 1080 | txd->buffer = cpu_to_le64(mapping); |
| 1081 | wmb(); |
| 1082 | txd->control_word = cpu_to_le64(this_ctrl | len); |
| 1083 | |
| 1084 | if (gem_intme(entry)) |
| 1085 | intme |= TXDCTRL_INTME; |
| 1086 | |
| 1087 | entry = NEXT_TX(entry); |
| 1088 | } |
| 1089 | txd = &gp->init_block->txd[first_entry]; |
| 1090 | txd->buffer = cpu_to_le64(first_mapping); |
| 1091 | wmb(); |
| 1092 | txd->control_word = |
| 1093 | cpu_to_le64(ctrl | TXDCTRL_SOF | intme | first_len); |
| 1094 | } |
| 1095 | |
| 1096 | gp->tx_new = entry; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1097 | if (unlikely(TX_BUFFS_AVAIL(gp) <= (MAX_SKB_FRAGS + 1))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | netif_stop_queue(dev); |
| 1099 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1100 | /* netif_stop_queue() must be done before checking |
| 1101 | * checking tx index in TX_BUFFS_AVAIL() below, because |
| 1102 | * in gem_tx(), we update tx_old before checking for |
| 1103 | * netif_queue_stopped(). |
| 1104 | */ |
| 1105 | smp_mb(); |
| 1106 | if (TX_BUFFS_AVAIL(gp) > (MAX_SKB_FRAGS + 1)) |
| 1107 | netif_wake_queue(dev); |
| 1108 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | if (netif_msg_tx_queued(gp)) |
| 1110 | printk(KERN_DEBUG "%s: tx queued, slot %d, skblen %d\n", |
| 1111 | dev->name, entry, skb->len); |
| 1112 | mb(); |
| 1113 | writel(gp->tx_new, gp->regs + TXDMA_KICK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
| 1115 | return NETDEV_TX_OK; |
| 1116 | } |
| 1117 | |
David S. Miller | 8c83f80 | 2008-12-09 00:10:11 -0800 | [diff] [blame] | 1118 | static void gem_pcs_reset(struct gem *gp) |
| 1119 | { |
| 1120 | int limit; |
| 1121 | u32 val; |
| 1122 | |
| 1123 | /* Reset PCS unit. */ |
| 1124 | val = readl(gp->regs + PCS_MIICTRL); |
| 1125 | val |= PCS_MIICTRL_RST; |
| 1126 | writel(val, gp->regs + PCS_MIICTRL); |
| 1127 | |
| 1128 | limit = 32; |
| 1129 | while (readl(gp->regs + PCS_MIICTRL) & PCS_MIICTRL_RST) { |
| 1130 | udelay(100); |
| 1131 | if (limit-- <= 0) |
| 1132 | break; |
| 1133 | } |
roel kluin | d13c11f | 2009-02-16 04:02:04 +0000 | [diff] [blame] | 1134 | if (limit < 0) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1135 | netdev_warn(gp->dev, "PCS reset bit would not clear\n"); |
David S. Miller | 8c83f80 | 2008-12-09 00:10:11 -0800 | [diff] [blame] | 1136 | } |
| 1137 | |
| 1138 | static void gem_pcs_reinit_adv(struct gem *gp) |
| 1139 | { |
| 1140 | u32 val; |
| 1141 | |
| 1142 | /* Make sure PCS is disabled while changing advertisement |
| 1143 | * configuration. |
| 1144 | */ |
| 1145 | val = readl(gp->regs + PCS_CFG); |
| 1146 | val &= ~(PCS_CFG_ENABLE | PCS_CFG_TO); |
| 1147 | writel(val, gp->regs + PCS_CFG); |
| 1148 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1149 | /* Advertise all capabilities except asymmetric |
David S. Miller | 8c83f80 | 2008-12-09 00:10:11 -0800 | [diff] [blame] | 1150 | * pause. |
| 1151 | */ |
| 1152 | val = readl(gp->regs + PCS_MIIADV); |
| 1153 | val |= (PCS_MIIADV_FD | PCS_MIIADV_HD | |
| 1154 | PCS_MIIADV_SP | PCS_MIIADV_AP); |
| 1155 | writel(val, gp->regs + PCS_MIIADV); |
| 1156 | |
| 1157 | /* Enable and restart auto-negotiation, disable wrapback/loopback, |
| 1158 | * and re-enable PCS. |
| 1159 | */ |
| 1160 | val = readl(gp->regs + PCS_MIICTRL); |
| 1161 | val |= (PCS_MIICTRL_RAN | PCS_MIICTRL_ANE); |
| 1162 | val &= ~PCS_MIICTRL_WB; |
| 1163 | writel(val, gp->regs + PCS_MIICTRL); |
| 1164 | |
| 1165 | val = readl(gp->regs + PCS_CFG); |
| 1166 | val |= PCS_CFG_ENABLE; |
| 1167 | writel(val, gp->regs + PCS_CFG); |
| 1168 | |
| 1169 | /* Make sure serialink loopback is off. The meaning |
| 1170 | * of this bit is logically inverted based upon whether |
| 1171 | * you are in Serialink or SERDES mode. |
| 1172 | */ |
| 1173 | val = readl(gp->regs + PCS_SCTRL); |
| 1174 | if (gp->phy_type == phy_serialink) |
| 1175 | val &= ~PCS_SCTRL_LOOP; |
| 1176 | else |
| 1177 | val |= PCS_SCTRL_LOOP; |
| 1178 | writel(val, gp->regs + PCS_SCTRL); |
| 1179 | } |
| 1180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | #define STOP_TRIES 32 |
| 1182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | static void gem_reset(struct gem *gp) |
| 1184 | { |
| 1185 | int limit; |
| 1186 | u32 val; |
| 1187 | |
| 1188 | /* Make sure we won't get any more interrupts */ |
| 1189 | writel(0xffffffff, gp->regs + GREG_IMASK); |
| 1190 | |
| 1191 | /* Reset the chip */ |
| 1192 | writel(gp->swrst_base | GREG_SWRST_TXRST | GREG_SWRST_RXRST, |
| 1193 | gp->regs + GREG_SWRST); |
| 1194 | |
| 1195 | limit = STOP_TRIES; |
| 1196 | |
| 1197 | do { |
| 1198 | udelay(20); |
| 1199 | val = readl(gp->regs + GREG_SWRST); |
| 1200 | if (limit-- <= 0) |
| 1201 | break; |
| 1202 | } while (val & (GREG_SWRST_TXRST | GREG_SWRST_RXRST)); |
| 1203 | |
Roel Kluin | 4a8fd2c | 2009-03-04 00:08:39 -0800 | [diff] [blame] | 1204 | if (limit < 0) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1205 | netdev_err(gp->dev, "SW reset is ghetto\n"); |
David S. Miller | 8c83f80 | 2008-12-09 00:10:11 -0800 | [diff] [blame] | 1206 | |
| 1207 | if (gp->phy_type == phy_serialink || gp->phy_type == phy_serdes) |
| 1208 | gem_pcs_reinit_adv(gp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
| 1210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | static void gem_start_dma(struct gem *gp) |
| 1212 | { |
| 1213 | u32 val; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | /* We are ready to rock, turn everything on. */ |
| 1216 | val = readl(gp->regs + TXDMA_CFG); |
| 1217 | writel(val | TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG); |
| 1218 | val = readl(gp->regs + RXDMA_CFG); |
| 1219 | writel(val | RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); |
| 1220 | val = readl(gp->regs + MAC_TXCFG); |
| 1221 | writel(val | MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG); |
| 1222 | val = readl(gp->regs + MAC_RXCFG); |
| 1223 | writel(val | MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); |
| 1224 | |
| 1225 | (void) readl(gp->regs + MAC_RXCFG); |
| 1226 | udelay(100); |
| 1227 | |
| 1228 | gem_enable_ints(gp); |
| 1229 | |
| 1230 | writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); |
| 1231 | } |
| 1232 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1233 | /* DMA won't be actually stopped before about 4ms tho ... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | */ |
| 1235 | static void gem_stop_dma(struct gem *gp) |
| 1236 | { |
| 1237 | u32 val; |
| 1238 | |
| 1239 | /* We are done rocking, turn everything off. */ |
| 1240 | val = readl(gp->regs + TXDMA_CFG); |
| 1241 | writel(val & ~TXDMA_CFG_ENABLE, gp->regs + TXDMA_CFG); |
| 1242 | val = readl(gp->regs + RXDMA_CFG); |
| 1243 | writel(val & ~RXDMA_CFG_ENABLE, gp->regs + RXDMA_CFG); |
| 1244 | val = readl(gp->regs + MAC_TXCFG); |
| 1245 | writel(val & ~MAC_TXCFG_ENAB, gp->regs + MAC_TXCFG); |
| 1246 | val = readl(gp->regs + MAC_RXCFG); |
| 1247 | writel(val & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); |
| 1248 | |
| 1249 | (void) readl(gp->regs + MAC_RXCFG); |
| 1250 | |
| 1251 | /* Need to wait a bit ... done by the caller */ |
| 1252 | } |
| 1253 | |
| 1254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | // XXX dbl check what that function should do when called on PCS PHY |
| 1256 | static void gem_begin_auto_negotiation(struct gem *gp, struct ethtool_cmd *ep) |
| 1257 | { |
| 1258 | u32 advertise, features; |
| 1259 | int autoneg; |
| 1260 | int speed; |
| 1261 | int duplex; |
| 1262 | |
| 1263 | if (gp->phy_type != phy_mii_mdio0 && |
| 1264 | gp->phy_type != phy_mii_mdio1) |
| 1265 | goto non_mii; |
| 1266 | |
| 1267 | /* Setup advertise */ |
| 1268 | if (found_mii_phy(gp)) |
| 1269 | features = gp->phy_mii.def->features; |
| 1270 | else |
| 1271 | features = 0; |
| 1272 | |
| 1273 | advertise = features & ADVERTISE_MASK; |
| 1274 | if (gp->phy_mii.advertising != 0) |
| 1275 | advertise &= gp->phy_mii.advertising; |
| 1276 | |
| 1277 | autoneg = gp->want_autoneg; |
| 1278 | speed = gp->phy_mii.speed; |
| 1279 | duplex = gp->phy_mii.duplex; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | /* Setup link parameters */ |
| 1282 | if (!ep) |
| 1283 | goto start_aneg; |
| 1284 | if (ep->autoneg == AUTONEG_ENABLE) { |
| 1285 | advertise = ep->advertising; |
| 1286 | autoneg = 1; |
| 1287 | } else { |
| 1288 | autoneg = 0; |
David Decotigny | 25db033 | 2011-04-27 18:32:39 +0000 | [diff] [blame] | 1289 | speed = ethtool_cmd_speed(ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | duplex = ep->duplex; |
| 1291 | } |
| 1292 | |
| 1293 | start_aneg: |
| 1294 | /* Sanitize settings based on PHY capabilities */ |
| 1295 | if ((features & SUPPORTED_Autoneg) == 0) |
| 1296 | autoneg = 0; |
| 1297 | if (speed == SPEED_1000 && |
| 1298 | !(features & (SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full))) |
| 1299 | speed = SPEED_100; |
| 1300 | if (speed == SPEED_100 && |
| 1301 | !(features & (SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full))) |
| 1302 | speed = SPEED_10; |
| 1303 | if (duplex == DUPLEX_FULL && |
| 1304 | !(features & (SUPPORTED_1000baseT_Full | |
| 1305 | SUPPORTED_100baseT_Full | |
| 1306 | SUPPORTED_10baseT_Full))) |
| 1307 | duplex = DUPLEX_HALF; |
| 1308 | if (speed == 0) |
| 1309 | speed = SPEED_10; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | /* If we are asleep, we don't try to actually setup the PHY, we |
| 1312 | * just store the settings |
| 1313 | */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1314 | if (!netif_device_present(gp->dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | gp->phy_mii.autoneg = gp->want_autoneg = autoneg; |
| 1316 | gp->phy_mii.speed = speed; |
| 1317 | gp->phy_mii.duplex = duplex; |
| 1318 | return; |
| 1319 | } |
| 1320 | |
| 1321 | /* Configure PHY & start aneg */ |
| 1322 | gp->want_autoneg = autoneg; |
| 1323 | if (autoneg) { |
| 1324 | if (found_mii_phy(gp)) |
| 1325 | gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, advertise); |
| 1326 | gp->lstate = link_aneg; |
| 1327 | } else { |
| 1328 | if (found_mii_phy(gp)) |
| 1329 | gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, speed, duplex); |
| 1330 | gp->lstate = link_force_ok; |
| 1331 | } |
| 1332 | |
| 1333 | non_mii: |
| 1334 | gp->timer_ticks = 0; |
| 1335 | mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); |
| 1336 | } |
| 1337 | |
| 1338 | /* A link-up condition has occurred, initialize and enable the |
| 1339 | * rest of the chip. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | */ |
| 1341 | static int gem_set_link_modes(struct gem *gp) |
| 1342 | { |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1343 | struct netdev_queue *txq = netdev_get_tx_queue(gp->dev, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | int full_duplex, speed, pause; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1345 | u32 val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | |
| 1347 | full_duplex = 0; |
| 1348 | speed = SPEED_10; |
| 1349 | pause = 0; |
| 1350 | |
| 1351 | if (found_mii_phy(gp)) { |
| 1352 | if (gp->phy_mii.def->ops->read_link(&gp->phy_mii)) |
| 1353 | return 1; |
| 1354 | full_duplex = (gp->phy_mii.duplex == DUPLEX_FULL); |
| 1355 | speed = gp->phy_mii.speed; |
| 1356 | pause = gp->phy_mii.pause; |
| 1357 | } else if (gp->phy_type == phy_serialink || |
| 1358 | gp->phy_type == phy_serdes) { |
| 1359 | u32 pcs_lpa = readl(gp->regs + PCS_MIILP); |
| 1360 | |
David S. Miller | 8c83f80 | 2008-12-09 00:10:11 -0800 | [diff] [blame] | 1361 | if ((pcs_lpa & PCS_MIIADV_FD) || gp->phy_type == phy_serdes) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | full_duplex = 1; |
| 1363 | speed = SPEED_1000; |
| 1364 | } |
| 1365 | |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1366 | netif_info(gp, link, gp->dev, "Link is up at %d Mbps, %s-duplex\n", |
| 1367 | speed, (full_duplex ? "full" : "half")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1369 | |
| 1370 | /* We take the tx queue lock to avoid collisions between |
| 1371 | * this code, the tx path and the NAPI-driven error path |
| 1372 | */ |
| 1373 | __netif_tx_lock(txq, smp_processor_id()); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
| 1375 | val = (MAC_TXCFG_EIPG0 | MAC_TXCFG_NGU); |
| 1376 | if (full_duplex) { |
| 1377 | val |= (MAC_TXCFG_ICS | MAC_TXCFG_ICOLL); |
| 1378 | } else { |
| 1379 | /* MAC_TXCFG_NBO must be zero. */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1380 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | writel(val, gp->regs + MAC_TXCFG); |
| 1382 | |
| 1383 | val = (MAC_XIFCFG_OE | MAC_XIFCFG_LLED); |
| 1384 | if (!full_duplex && |
| 1385 | (gp->phy_type == phy_mii_mdio0 || |
| 1386 | gp->phy_type == phy_mii_mdio1)) { |
| 1387 | val |= MAC_XIFCFG_DISE; |
| 1388 | } else if (full_duplex) { |
| 1389 | val |= MAC_XIFCFG_FLED; |
| 1390 | } |
| 1391 | |
| 1392 | if (speed == SPEED_1000) |
| 1393 | val |= (MAC_XIFCFG_GMII); |
| 1394 | |
| 1395 | writel(val, gp->regs + MAC_XIFCFG); |
| 1396 | |
| 1397 | /* If gigabit and half-duplex, enable carrier extension |
| 1398 | * mode. Else, disable it. |
| 1399 | */ |
| 1400 | if (speed == SPEED_1000 && !full_duplex) { |
| 1401 | val = readl(gp->regs + MAC_TXCFG); |
| 1402 | writel(val | MAC_TXCFG_TCE, gp->regs + MAC_TXCFG); |
| 1403 | |
| 1404 | val = readl(gp->regs + MAC_RXCFG); |
| 1405 | writel(val | MAC_RXCFG_RCE, gp->regs + MAC_RXCFG); |
| 1406 | } else { |
| 1407 | val = readl(gp->regs + MAC_TXCFG); |
| 1408 | writel(val & ~MAC_TXCFG_TCE, gp->regs + MAC_TXCFG); |
| 1409 | |
| 1410 | val = readl(gp->regs + MAC_RXCFG); |
| 1411 | writel(val & ~MAC_RXCFG_RCE, gp->regs + MAC_RXCFG); |
| 1412 | } |
| 1413 | |
| 1414 | if (gp->phy_type == phy_serialink || |
| 1415 | gp->phy_type == phy_serdes) { |
| 1416 | u32 pcs_lpa = readl(gp->regs + PCS_MIILP); |
| 1417 | |
| 1418 | if (pcs_lpa & (PCS_MIIADV_SP | PCS_MIIADV_AP)) |
| 1419 | pause = 1; |
| 1420 | } |
| 1421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | if (!full_duplex) |
| 1423 | writel(512, gp->regs + MAC_STIME); |
| 1424 | else |
| 1425 | writel(64, gp->regs + MAC_STIME); |
| 1426 | val = readl(gp->regs + MAC_MCCFG); |
| 1427 | if (pause) |
| 1428 | val |= (MAC_MCCFG_SPE | MAC_MCCFG_RPE); |
| 1429 | else |
| 1430 | val &= ~(MAC_MCCFG_SPE | MAC_MCCFG_RPE); |
| 1431 | writel(val, gp->regs + MAC_MCCFG); |
| 1432 | |
| 1433 | gem_start_dma(gp); |
| 1434 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1435 | __netif_tx_unlock(txq); |
| 1436 | |
| 1437 | if (netif_msg_link(gp)) { |
| 1438 | if (pause) { |
| 1439 | netdev_info(gp->dev, |
| 1440 | "Pause is enabled (rxfifo: %d off: %d on: %d)\n", |
| 1441 | gp->rx_fifo_sz, |
| 1442 | gp->rx_pause_off, |
| 1443 | gp->rx_pause_on); |
| 1444 | } else { |
| 1445 | netdev_info(gp->dev, "Pause is disabled\n"); |
| 1446 | } |
| 1447 | } |
| 1448 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | return 0; |
| 1450 | } |
| 1451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | static int gem_mdio_link_not_up(struct gem *gp) |
| 1453 | { |
| 1454 | switch (gp->lstate) { |
| 1455 | case link_force_ret: |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1456 | netif_info(gp, link, gp->dev, |
| 1457 | "Autoneg failed again, keeping forced mode\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, |
| 1459 | gp->last_forced_speed, DUPLEX_HALF); |
| 1460 | gp->timer_ticks = 5; |
| 1461 | gp->lstate = link_force_ok; |
| 1462 | return 0; |
| 1463 | case link_aneg: |
| 1464 | /* We try forced modes after a failed aneg only on PHYs that don't |
| 1465 | * have "magic_aneg" bit set, which means they internally do the |
| 1466 | * while forced-mode thingy. On these, we just restart aneg |
| 1467 | */ |
| 1468 | if (gp->phy_mii.def->magic_aneg) |
| 1469 | return 1; |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1470 | netif_info(gp, link, gp->dev, "switching to forced 100bt\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | /* Try forced modes. */ |
| 1472 | gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_100, |
| 1473 | DUPLEX_HALF); |
| 1474 | gp->timer_ticks = 5; |
| 1475 | gp->lstate = link_force_try; |
| 1476 | return 0; |
| 1477 | case link_force_try: |
| 1478 | /* Downgrade from 100 to 10 Mbps if necessary. |
| 1479 | * If already at 10Mbps, warn user about the |
| 1480 | * situation every 10 ticks. |
| 1481 | */ |
| 1482 | if (gp->phy_mii.speed == SPEED_100) { |
| 1483 | gp->phy_mii.def->ops->setup_forced(&gp->phy_mii, SPEED_10, |
| 1484 | DUPLEX_HALF); |
| 1485 | gp->timer_ticks = 5; |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1486 | netif_info(gp, link, gp->dev, |
| 1487 | "switching to forced 10bt\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | return 0; |
| 1489 | } else |
| 1490 | return 1; |
| 1491 | default: |
| 1492 | return 0; |
| 1493 | } |
| 1494 | } |
| 1495 | |
| 1496 | static void gem_link_timer(unsigned long data) |
| 1497 | { |
| 1498 | struct gem *gp = (struct gem *) data; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1499 | struct net_device *dev = gp->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | int restart_aneg = 0; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1501 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1502 | /* There's no point doing anything if we're going to be reset */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | if (gp->reset_task_pending) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1504 | return; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | if (gp->phy_type == phy_serialink || |
| 1507 | gp->phy_type == phy_serdes) { |
| 1508 | u32 val = readl(gp->regs + PCS_MIISTAT); |
| 1509 | |
| 1510 | if (!(val & PCS_MIISTAT_LS)) |
| 1511 | val = readl(gp->regs + PCS_MIISTAT); |
| 1512 | |
| 1513 | if ((val & PCS_MIISTAT_LS) != 0) { |
David S. Miller | 8c83f80 | 2008-12-09 00:10:11 -0800 | [diff] [blame] | 1514 | if (gp->lstate == link_up) |
| 1515 | goto restart; |
| 1516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | gp->lstate = link_up; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1518 | netif_carrier_on(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | (void)gem_set_link_modes(gp); |
| 1520 | } |
| 1521 | goto restart; |
| 1522 | } |
| 1523 | if (found_mii_phy(gp) && gp->phy_mii.def->ops->poll_link(&gp->phy_mii)) { |
| 1524 | /* Ok, here we got a link. If we had it due to a forced |
| 1525 | * fallback, and we were configured for autoneg, we do |
| 1526 | * retry a short autoneg pass. If you know your hub is |
| 1527 | * broken, use ethtool ;) |
| 1528 | */ |
| 1529 | if (gp->lstate == link_force_try && gp->want_autoneg) { |
| 1530 | gp->lstate = link_force_ret; |
| 1531 | gp->last_forced_speed = gp->phy_mii.speed; |
| 1532 | gp->timer_ticks = 5; |
| 1533 | if (netif_msg_link(gp)) |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1534 | netdev_info(dev, |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1535 | "Got link after fallback, retrying autoneg once...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | gp->phy_mii.def->ops->setup_aneg(&gp->phy_mii, gp->phy_mii.advertising); |
| 1537 | } else if (gp->lstate != link_up) { |
| 1538 | gp->lstate = link_up; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1539 | netif_carrier_on(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | if (gem_set_link_modes(gp)) |
| 1541 | restart_aneg = 1; |
| 1542 | } |
| 1543 | } else { |
| 1544 | /* If the link was previously up, we restart the |
| 1545 | * whole process |
| 1546 | */ |
| 1547 | if (gp->lstate == link_up) { |
| 1548 | gp->lstate = link_down; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1549 | netif_info(gp, link, dev, "Link down\n"); |
| 1550 | netif_carrier_off(dev); |
| 1551 | gem_schedule_reset(gp); |
| 1552 | /* The reset task will restart the timer */ |
| 1553 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | } else if (++gp->timer_ticks > 10) { |
| 1555 | if (found_mii_phy(gp)) |
| 1556 | restart_aneg = gem_mdio_link_not_up(gp); |
| 1557 | else |
| 1558 | restart_aneg = 1; |
| 1559 | } |
| 1560 | } |
| 1561 | if (restart_aneg) { |
| 1562 | gem_begin_auto_negotiation(gp, NULL); |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1563 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | } |
| 1565 | restart: |
| 1566 | mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | } |
| 1568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | static void gem_clean_rings(struct gem *gp) |
| 1570 | { |
| 1571 | struct gem_init_block *gb = gp->init_block; |
| 1572 | struct sk_buff *skb; |
| 1573 | int i; |
| 1574 | dma_addr_t dma_addr; |
| 1575 | |
| 1576 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1577 | struct gem_rxd *rxd; |
| 1578 | |
| 1579 | rxd = &gb->rxd[i]; |
| 1580 | if (gp->rx_skbs[i] != NULL) { |
| 1581 | skb = gp->rx_skbs[i]; |
| 1582 | dma_addr = le64_to_cpu(rxd->buffer); |
| 1583 | pci_unmap_page(gp->pdev, dma_addr, |
| 1584 | RX_BUF_ALLOC_SIZE(gp), |
| 1585 | PCI_DMA_FROMDEVICE); |
| 1586 | dev_kfree_skb_any(skb); |
| 1587 | gp->rx_skbs[i] = NULL; |
| 1588 | } |
| 1589 | rxd->status_word = 0; |
| 1590 | wmb(); |
| 1591 | rxd->buffer = 0; |
| 1592 | } |
| 1593 | |
| 1594 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1595 | if (gp->tx_skbs[i] != NULL) { |
| 1596 | struct gem_txd *txd; |
| 1597 | int frag; |
| 1598 | |
| 1599 | skb = gp->tx_skbs[i]; |
| 1600 | gp->tx_skbs[i] = NULL; |
| 1601 | |
| 1602 | for (frag = 0; frag <= skb_shinfo(skb)->nr_frags; frag++) { |
| 1603 | int ent = i & (TX_RING_SIZE - 1); |
| 1604 | |
| 1605 | txd = &gb->txd[ent]; |
| 1606 | dma_addr = le64_to_cpu(txd->buffer); |
| 1607 | pci_unmap_page(gp->pdev, dma_addr, |
| 1608 | le64_to_cpu(txd->control_word) & |
| 1609 | TXDCTRL_BUFSZ, PCI_DMA_TODEVICE); |
| 1610 | |
| 1611 | if (frag != skb_shinfo(skb)->nr_frags) |
| 1612 | i++; |
| 1613 | } |
| 1614 | dev_kfree_skb_any(skb); |
| 1615 | } |
| 1616 | } |
| 1617 | } |
| 1618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | static void gem_init_rings(struct gem *gp) |
| 1620 | { |
| 1621 | struct gem_init_block *gb = gp->init_block; |
| 1622 | struct net_device *dev = gp->dev; |
| 1623 | int i; |
| 1624 | dma_addr_t dma_addr; |
| 1625 | |
| 1626 | gp->rx_new = gp->rx_old = gp->tx_new = gp->tx_old = 0; |
| 1627 | |
| 1628 | gem_clean_rings(gp); |
| 1629 | |
| 1630 | gp->rx_buf_sz = max(dev->mtu + ETH_HLEN + VLAN_HLEN, |
| 1631 | (unsigned)VLAN_ETH_FRAME_LEN); |
| 1632 | |
| 1633 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1634 | struct sk_buff *skb; |
| 1635 | struct gem_rxd *rxd = &gb->rxd[i]; |
| 1636 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1637 | skb = gem_alloc_skb(dev, RX_BUF_ALLOC_SIZE(gp), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | if (!skb) { |
| 1639 | rxd->buffer = 0; |
| 1640 | rxd->status_word = 0; |
| 1641 | continue; |
| 1642 | } |
| 1643 | |
| 1644 | gp->rx_skbs[i] = skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | skb_put(skb, (gp->rx_buf_sz + RX_OFFSET)); |
| 1646 | dma_addr = pci_map_page(gp->pdev, |
| 1647 | virt_to_page(skb->data), |
| 1648 | offset_in_page(skb->data), |
| 1649 | RX_BUF_ALLOC_SIZE(gp), |
| 1650 | PCI_DMA_FROMDEVICE); |
| 1651 | rxd->buffer = cpu_to_le64(dma_addr); |
| 1652 | wmb(); |
| 1653 | rxd->status_word = cpu_to_le64(RXDCTRL_FRESH(gp)); |
| 1654 | skb_reserve(skb, RX_OFFSET); |
| 1655 | } |
| 1656 | |
| 1657 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1658 | struct gem_txd *txd = &gb->txd[i]; |
| 1659 | |
| 1660 | txd->control_word = 0; |
| 1661 | wmb(); |
| 1662 | txd->buffer = 0; |
| 1663 | } |
| 1664 | wmb(); |
| 1665 | } |
| 1666 | |
| 1667 | /* Init PHY interface and start link poll state machine */ |
| 1668 | static void gem_init_phy(struct gem *gp) |
| 1669 | { |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 1670 | u32 mifcfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | |
| 1672 | /* Revert MIF CFG setting done on stop_phy */ |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 1673 | mifcfg = readl(gp->regs + MIF_CFG); |
| 1674 | mifcfg &= ~MIF_CFG_BBMODE; |
| 1675 | writel(mifcfg, gp->regs + MIF_CFG); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) { |
| 1678 | int i; |
| 1679 | |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 1680 | /* Those delay sucks, the HW seem to love them though, I'll |
| 1681 | * serisouly consider breaking some locks here to be able |
| 1682 | * to schedule instead |
Benjamin Herrenschmidt | 4072719 | 2006-01-23 16:30:04 -0800 | [diff] [blame] | 1683 | */ |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 1684 | for (i = 0; i < 3; i++) { |
| 1685 | #ifdef CONFIG_PPC_PMAC |
| 1686 | pmac_call_feature(PMAC_FTR_GMAC_PHY_RESET, gp->of_node, 0, 0); |
| 1687 | msleep(20); |
| 1688 | #endif |
| 1689 | /* Some PHYs used by apple have problem getting back to us, |
| 1690 | * we do an additional reset here |
| 1691 | */ |
| 1692 | phy_write(gp, MII_BMCR, BMCR_RESET); |
| 1693 | msleep(20); |
| 1694 | if (phy_read(gp, MII_BMCR) != 0xffff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | break; |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 1696 | if (i == 2) |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1697 | netdev_warn(gp->dev, "GMAC PHY not responding !\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | if (gp->pdev->vendor == PCI_VENDOR_ID_SUN && |
| 1702 | gp->pdev->device == PCI_DEVICE_ID_SUN_GEM) { |
| 1703 | u32 val; |
| 1704 | |
| 1705 | /* Init datapath mode register. */ |
| 1706 | if (gp->phy_type == phy_mii_mdio0 || |
| 1707 | gp->phy_type == phy_mii_mdio1) { |
| 1708 | val = PCS_DMODE_MGM; |
| 1709 | } else if (gp->phy_type == phy_serialink) { |
| 1710 | val = PCS_DMODE_SM | PCS_DMODE_GMOE; |
| 1711 | } else { |
| 1712 | val = PCS_DMODE_ESM; |
| 1713 | } |
| 1714 | |
| 1715 | writel(val, gp->regs + PCS_DMODE); |
| 1716 | } |
| 1717 | |
| 1718 | if (gp->phy_type == phy_mii_mdio0 || |
| 1719 | gp->phy_type == phy_mii_mdio1) { |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1720 | /* Reset and detect MII PHY */ |
David S. Miller | 19e2f6f | 2011-08-15 23:10:39 -0700 | [diff] [blame] | 1721 | sungem_phy_probe(&gp->phy_mii, gp->mii_phy_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | |
| 1723 | /* Init PHY */ |
| 1724 | if (gp->phy_mii.def && gp->phy_mii.def->ops->init) |
| 1725 | gp->phy_mii.def->ops->init(&gp->phy_mii); |
| 1726 | } else { |
David S. Miller | 8c83f80 | 2008-12-09 00:10:11 -0800 | [diff] [blame] | 1727 | gem_pcs_reset(gp); |
| 1728 | gem_pcs_reinit_adv(gp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | } |
| 1730 | |
| 1731 | /* Default aneg parameters */ |
| 1732 | gp->timer_ticks = 0; |
| 1733 | gp->lstate = link_down; |
| 1734 | netif_carrier_off(gp->dev); |
| 1735 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 1736 | /* Print things out */ |
| 1737 | if (gp->phy_type == phy_mii_mdio0 || |
| 1738 | gp->phy_type == phy_mii_mdio1) |
| 1739 | netdev_info(gp->dev, "Found %s PHY\n", |
| 1740 | gp->phy_mii.def ? gp->phy_mii.def->name : "no"); |
| 1741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | gem_begin_auto_negotiation(gp, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | } |
| 1744 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | static void gem_init_dma(struct gem *gp) |
| 1746 | { |
| 1747 | u64 desc_dma = (u64) gp->gblock_dvma; |
| 1748 | u32 val; |
| 1749 | |
| 1750 | val = (TXDMA_CFG_BASE | (0x7ff << 10) | TXDMA_CFG_PMODE); |
| 1751 | writel(val, gp->regs + TXDMA_CFG); |
| 1752 | |
| 1753 | writel(desc_dma >> 32, gp->regs + TXDMA_DBHI); |
| 1754 | writel(desc_dma & 0xffffffff, gp->regs + TXDMA_DBLOW); |
| 1755 | desc_dma += (INIT_BLOCK_TX_RING_SIZE * sizeof(struct gem_txd)); |
| 1756 | |
| 1757 | writel(0, gp->regs + TXDMA_KICK); |
| 1758 | |
| 1759 | val = (RXDMA_CFG_BASE | (RX_OFFSET << 10) | |
| 1760 | ((14 / 2) << 13) | RXDMA_CFG_FTHRESH_128); |
| 1761 | writel(val, gp->regs + RXDMA_CFG); |
| 1762 | |
| 1763 | writel(desc_dma >> 32, gp->regs + RXDMA_DBHI); |
| 1764 | writel(desc_dma & 0xffffffff, gp->regs + RXDMA_DBLOW); |
| 1765 | |
| 1766 | writel(RX_RING_SIZE - 4, gp->regs + RXDMA_KICK); |
| 1767 | |
| 1768 | val = (((gp->rx_pause_off / 64) << 0) & RXDMA_PTHRESH_OFF); |
| 1769 | val |= (((gp->rx_pause_on / 64) << 12) & RXDMA_PTHRESH_ON); |
| 1770 | writel(val, gp->regs + RXDMA_PTHRESH); |
| 1771 | |
| 1772 | if (readl(gp->regs + GREG_BIFCFG) & GREG_BIFCFG_M66EN) |
| 1773 | writel(((5 & RXDMA_BLANK_IPKTS) | |
| 1774 | ((8 << 12) & RXDMA_BLANK_ITIME)), |
| 1775 | gp->regs + RXDMA_BLANK); |
| 1776 | else |
| 1777 | writel(((5 & RXDMA_BLANK_IPKTS) | |
| 1778 | ((4 << 12) & RXDMA_BLANK_ITIME)), |
| 1779 | gp->regs + RXDMA_BLANK); |
| 1780 | } |
| 1781 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | static u32 gem_setup_multicast(struct gem *gp) |
| 1783 | { |
| 1784 | u32 rxcfg = 0; |
| 1785 | int i; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1786 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | if ((gp->dev->flags & IFF_ALLMULTI) || |
Jiri Pirko | 4cd24ea | 2010-02-08 04:30:35 +0000 | [diff] [blame] | 1788 | (netdev_mc_count(gp->dev) > 256)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | for (i=0; i<16; i++) |
| 1790 | writel(0xffff, gp->regs + MAC_HASH0 + (i << 2)); |
| 1791 | rxcfg |= MAC_RXCFG_HFE; |
| 1792 | } else if (gp->dev->flags & IFF_PROMISC) { |
| 1793 | rxcfg |= MAC_RXCFG_PROM; |
| 1794 | } else { |
| 1795 | u16 hash_table[16]; |
| 1796 | u32 crc; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1797 | struct netdev_hw_addr *ha; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | int i; |
| 1799 | |
Jiri Pirko | 5508590 | 2010-02-18 00:42:54 +0000 | [diff] [blame] | 1800 | memset(hash_table, 0, sizeof(hash_table)); |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1801 | netdev_for_each_mc_addr(ha, gp->dev) { |
Tobias Klauser | 498d8e2 | 2011-07-07 22:06:26 +0000 | [diff] [blame] | 1802 | crc = ether_crc_le(6, ha->addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | crc >>= 24; |
| 1804 | hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf)); |
| 1805 | } |
| 1806 | for (i=0; i<16; i++) |
| 1807 | writel(hash_table[i], gp->regs + MAC_HASH0 + (i << 2)); |
| 1808 | rxcfg |= MAC_RXCFG_HFE; |
| 1809 | } |
| 1810 | |
| 1811 | return rxcfg; |
| 1812 | } |
| 1813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | static void gem_init_mac(struct gem *gp) |
| 1815 | { |
| 1816 | unsigned char *e = &gp->dev->dev_addr[0]; |
| 1817 | |
| 1818 | writel(0x1bf0, gp->regs + MAC_SNDPAUSE); |
| 1819 | |
| 1820 | writel(0x00, gp->regs + MAC_IPG0); |
| 1821 | writel(0x08, gp->regs + MAC_IPG1); |
| 1822 | writel(0x04, gp->regs + MAC_IPG2); |
| 1823 | writel(0x40, gp->regs + MAC_STIME); |
| 1824 | writel(0x40, gp->regs + MAC_MINFSZ); |
| 1825 | |
| 1826 | /* Ethernet payload + header + FCS + optional VLAN tag. */ |
| 1827 | writel(0x20000000 | (gp->rx_buf_sz + 4), gp->regs + MAC_MAXFSZ); |
| 1828 | |
| 1829 | writel(0x07, gp->regs + MAC_PASIZE); |
| 1830 | writel(0x04, gp->regs + MAC_JAMSIZE); |
| 1831 | writel(0x10, gp->regs + MAC_ATTLIM); |
| 1832 | writel(0x8808, gp->regs + MAC_MCTYPE); |
| 1833 | |
| 1834 | writel((e[5] | (e[4] << 8)) & 0x3ff, gp->regs + MAC_RANDSEED); |
| 1835 | |
| 1836 | writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0); |
| 1837 | writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1); |
| 1838 | writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2); |
| 1839 | |
| 1840 | writel(0, gp->regs + MAC_ADDR3); |
| 1841 | writel(0, gp->regs + MAC_ADDR4); |
| 1842 | writel(0, gp->regs + MAC_ADDR5); |
| 1843 | |
| 1844 | writel(0x0001, gp->regs + MAC_ADDR6); |
| 1845 | writel(0xc200, gp->regs + MAC_ADDR7); |
| 1846 | writel(0x0180, gp->regs + MAC_ADDR8); |
| 1847 | |
| 1848 | writel(0, gp->regs + MAC_AFILT0); |
| 1849 | writel(0, gp->regs + MAC_AFILT1); |
| 1850 | writel(0, gp->regs + MAC_AFILT2); |
| 1851 | writel(0, gp->regs + MAC_AF21MSK); |
| 1852 | writel(0, gp->regs + MAC_AF0MSK); |
| 1853 | |
| 1854 | gp->mac_rx_cfg = gem_setup_multicast(gp); |
| 1855 | #ifdef STRIP_FCS |
| 1856 | gp->mac_rx_cfg |= MAC_RXCFG_SFCS; |
| 1857 | #endif |
| 1858 | writel(0, gp->regs + MAC_NCOLL); |
| 1859 | writel(0, gp->regs + MAC_FASUCC); |
| 1860 | writel(0, gp->regs + MAC_ECOLL); |
| 1861 | writel(0, gp->regs + MAC_LCOLL); |
| 1862 | writel(0, gp->regs + MAC_DTIMER); |
| 1863 | writel(0, gp->regs + MAC_PATMPS); |
| 1864 | writel(0, gp->regs + MAC_RFCTR); |
| 1865 | writel(0, gp->regs + MAC_LERR); |
| 1866 | writel(0, gp->regs + MAC_AERR); |
| 1867 | writel(0, gp->regs + MAC_FCSERR); |
| 1868 | writel(0, gp->regs + MAC_RXCVERR); |
| 1869 | |
| 1870 | /* Clear RX/TX/MAC/XIF config, we will set these up and enable |
| 1871 | * them once a link is established. |
| 1872 | */ |
| 1873 | writel(0, gp->regs + MAC_TXCFG); |
| 1874 | writel(gp->mac_rx_cfg, gp->regs + MAC_RXCFG); |
| 1875 | writel(0, gp->regs + MAC_MCCFG); |
| 1876 | writel(0, gp->regs + MAC_XIFCFG); |
| 1877 | |
| 1878 | /* Setup MAC interrupts. We want to get all of the interesting |
| 1879 | * counter expiration events, but we do not want to hear about |
| 1880 | * normal rx/tx as the DMA engine tells us that. |
| 1881 | */ |
| 1882 | writel(MAC_TXSTAT_XMIT, gp->regs + MAC_TXMASK); |
| 1883 | writel(MAC_RXSTAT_RCV, gp->regs + MAC_RXMASK); |
| 1884 | |
| 1885 | /* Don't enable even the PAUSE interrupts for now, we |
| 1886 | * make no use of those events other than to record them. |
| 1887 | */ |
| 1888 | writel(0xffffffff, gp->regs + MAC_MCMASK); |
| 1889 | |
| 1890 | /* Don't enable GEM's WOL in normal operations |
| 1891 | */ |
| 1892 | if (gp->has_wol) |
| 1893 | writel(0, gp->regs + WOL_WAKECSR); |
| 1894 | } |
| 1895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | static void gem_init_pause_thresholds(struct gem *gp) |
| 1897 | { |
| 1898 | u32 cfg; |
| 1899 | |
| 1900 | /* Calculate pause thresholds. Setting the OFF threshold to the |
| 1901 | * full RX fifo size effectively disables PAUSE generation which |
| 1902 | * is what we do for 10/100 only GEMs which have FIFOs too small |
| 1903 | * to make real gains from PAUSE. |
| 1904 | */ |
| 1905 | if (gp->rx_fifo_sz <= (2 * 1024)) { |
| 1906 | gp->rx_pause_off = gp->rx_pause_on = gp->rx_fifo_sz; |
| 1907 | } else { |
| 1908 | int max_frame = (gp->rx_buf_sz + 4 + 64) & ~63; |
| 1909 | int off = (gp->rx_fifo_sz - (max_frame * 2)); |
| 1910 | int on = off - max_frame; |
| 1911 | |
| 1912 | gp->rx_pause_off = off; |
| 1913 | gp->rx_pause_on = on; |
| 1914 | } |
| 1915 | |
| 1916 | |
| 1917 | /* Configure the chip "burst" DMA mode & enable some |
| 1918 | * HW bug fixes on Apple version |
| 1919 | */ |
| 1920 | cfg = 0; |
| 1921 | if (gp->pdev->vendor == PCI_VENDOR_ID_APPLE) |
| 1922 | cfg |= GREG_CFG_RONPAULBIT | GREG_CFG_ENBUG2FIX; |
| 1923 | #if !defined(CONFIG_SPARC64) && !defined(CONFIG_ALPHA) |
| 1924 | cfg |= GREG_CFG_IBURST; |
| 1925 | #endif |
| 1926 | cfg |= ((31 << 1) & GREG_CFG_TXDMALIM); |
| 1927 | cfg |= ((31 << 6) & GREG_CFG_RXDMALIM); |
| 1928 | writel(cfg, gp->regs + GREG_CFG); |
| 1929 | |
| 1930 | /* If Infinite Burst didn't stick, then use different |
| 1931 | * thresholds (and Apple bug fixes don't exist) |
| 1932 | */ |
| 1933 | if (!(readl(gp->regs + GREG_CFG) & GREG_CFG_IBURST)) { |
| 1934 | cfg = ((2 << 1) & GREG_CFG_TXDMALIM); |
| 1935 | cfg |= ((8 << 6) & GREG_CFG_RXDMALIM); |
| 1936 | writel(cfg, gp->regs + GREG_CFG); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1937 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | } |
| 1939 | |
| 1940 | static int gem_check_invariants(struct gem *gp) |
| 1941 | { |
| 1942 | struct pci_dev *pdev = gp->pdev; |
| 1943 | u32 mif_cfg; |
| 1944 | |
| 1945 | /* On Apple's sungem, we can't rely on registers as the chip |
| 1946 | * was been powered down by the firmware. The PHY is looked |
| 1947 | * up later on. |
| 1948 | */ |
| 1949 | if (pdev->vendor == PCI_VENDOR_ID_APPLE) { |
| 1950 | gp->phy_type = phy_mii_mdio0; |
| 1951 | gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64; |
| 1952 | gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64; |
| 1953 | gp->swrst_base = 0; |
| 1954 | |
| 1955 | mif_cfg = readl(gp->regs + MIF_CFG); |
| 1956 | mif_cfg &= ~(MIF_CFG_PSELECT|MIF_CFG_POLL|MIF_CFG_BBMODE|MIF_CFG_MDI1); |
| 1957 | mif_cfg |= MIF_CFG_MDI0; |
| 1958 | writel(mif_cfg, gp->regs + MIF_CFG); |
| 1959 | writel(PCS_DMODE_MGM, gp->regs + PCS_DMODE); |
| 1960 | writel(MAC_XIFCFG_OE, gp->regs + MAC_XIFCFG); |
| 1961 | |
| 1962 | /* We hard-code the PHY address so we can properly bring it out of |
| 1963 | * reset later on, we can't really probe it at this point, though |
| 1964 | * that isn't an issue. |
| 1965 | */ |
| 1966 | if (gp->pdev->device == PCI_DEVICE_ID_APPLE_K2_GMAC) |
| 1967 | gp->mii_phy_addr = 1; |
| 1968 | else |
| 1969 | gp->mii_phy_addr = 0; |
| 1970 | |
| 1971 | return 0; |
| 1972 | } |
| 1973 | |
| 1974 | mif_cfg = readl(gp->regs + MIF_CFG); |
| 1975 | |
| 1976 | if (pdev->vendor == PCI_VENDOR_ID_SUN && |
| 1977 | pdev->device == PCI_DEVICE_ID_SUN_RIO_GEM) { |
| 1978 | /* One of the MII PHYs _must_ be present |
| 1979 | * as this chip has no gigabit PHY. |
| 1980 | */ |
| 1981 | if ((mif_cfg & (MIF_CFG_MDI0 | MIF_CFG_MDI1)) == 0) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 1982 | pr_err("RIO GEM lacks MII phy, mif_cfg[%08x]\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | mif_cfg); |
| 1984 | return -1; |
| 1985 | } |
| 1986 | } |
| 1987 | |
| 1988 | /* Determine initial PHY interface type guess. MDIO1 is the |
| 1989 | * external PHY and thus takes precedence over MDIO0. |
| 1990 | */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | if (mif_cfg & MIF_CFG_MDI1) { |
| 1993 | gp->phy_type = phy_mii_mdio1; |
| 1994 | mif_cfg |= MIF_CFG_PSELECT; |
| 1995 | writel(mif_cfg, gp->regs + MIF_CFG); |
| 1996 | } else if (mif_cfg & MIF_CFG_MDI0) { |
| 1997 | gp->phy_type = phy_mii_mdio0; |
| 1998 | mif_cfg &= ~MIF_CFG_PSELECT; |
| 1999 | writel(mif_cfg, gp->regs + MIF_CFG); |
| 2000 | } else { |
David S. Miller | e54d551 | 2009-11-17 04:46:18 -0800 | [diff] [blame] | 2001 | #ifdef CONFIG_SPARC |
| 2002 | const char *p; |
| 2003 | |
| 2004 | p = of_get_property(gp->of_node, "shared-pins", NULL); |
| 2005 | if (p && !strcmp(p, "serdes")) |
| 2006 | gp->phy_type = phy_serdes; |
| 2007 | else |
| 2008 | #endif |
| 2009 | gp->phy_type = phy_serialink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | } |
| 2011 | if (gp->phy_type == phy_mii_mdio1 || |
| 2012 | gp->phy_type == phy_mii_mdio0) { |
| 2013 | int i; |
| 2014 | |
| 2015 | for (i = 0; i < 32; i++) { |
| 2016 | gp->mii_phy_addr = i; |
| 2017 | if (phy_read(gp, MII_BMCR) != 0xffff) |
| 2018 | break; |
| 2019 | } |
| 2020 | if (i == 32) { |
| 2021 | if (pdev->device != PCI_DEVICE_ID_SUN_GEM) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2022 | pr_err("RIO MII phy will not respond\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | return -1; |
| 2024 | } |
| 2025 | gp->phy_type = phy_serdes; |
| 2026 | } |
| 2027 | } |
| 2028 | |
| 2029 | /* Fetch the FIFO configurations now too. */ |
| 2030 | gp->tx_fifo_sz = readl(gp->regs + TXDMA_FSZ) * 64; |
| 2031 | gp->rx_fifo_sz = readl(gp->regs + RXDMA_FSZ) * 64; |
| 2032 | |
| 2033 | if (pdev->vendor == PCI_VENDOR_ID_SUN) { |
| 2034 | if (pdev->device == PCI_DEVICE_ID_SUN_GEM) { |
| 2035 | if (gp->tx_fifo_sz != (9 * 1024) || |
| 2036 | gp->rx_fifo_sz != (20 * 1024)) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2037 | pr_err("GEM has bogus fifo sizes tx(%d) rx(%d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | gp->tx_fifo_sz, gp->rx_fifo_sz); |
| 2039 | return -1; |
| 2040 | } |
| 2041 | gp->swrst_base = 0; |
| 2042 | } else { |
| 2043 | if (gp->tx_fifo_sz != (2 * 1024) || |
| 2044 | gp->rx_fifo_sz != (2 * 1024)) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2045 | pr_err("RIO GEM has bogus fifo sizes tx(%d) rx(%d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | gp->tx_fifo_sz, gp->rx_fifo_sz); |
| 2047 | return -1; |
| 2048 | } |
| 2049 | gp->swrst_base = (64 / 4) << GREG_SWRST_CACHE_SHIFT; |
| 2050 | } |
| 2051 | } |
| 2052 | |
| 2053 | return 0; |
| 2054 | } |
| 2055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | static void gem_reinit_chip(struct gem *gp) |
| 2057 | { |
| 2058 | /* Reset the chip */ |
| 2059 | gem_reset(gp); |
| 2060 | |
| 2061 | /* Make sure ints are disabled */ |
| 2062 | gem_disable_ints(gp); |
| 2063 | |
| 2064 | /* Allocate & setup ring buffers */ |
| 2065 | gem_init_rings(gp); |
| 2066 | |
| 2067 | /* Configure pause thresholds */ |
| 2068 | gem_init_pause_thresholds(gp); |
| 2069 | |
| 2070 | /* Init DMA & MAC engines */ |
| 2071 | gem_init_dma(gp); |
| 2072 | gem_init_mac(gp); |
| 2073 | } |
| 2074 | |
| 2075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | static void gem_stop_phy(struct gem *gp, int wol) |
| 2077 | { |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 2078 | u32 mifcfg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | |
| 2080 | /* Let the chip settle down a bit, it seems that helps |
| 2081 | * for sleep mode on some models |
| 2082 | */ |
| 2083 | msleep(10); |
| 2084 | |
| 2085 | /* Make sure we aren't polling PHY status change. We |
| 2086 | * don't currently use that feature though |
| 2087 | */ |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 2088 | mifcfg = readl(gp->regs + MIF_CFG); |
| 2089 | mifcfg &= ~MIF_CFG_POLL; |
| 2090 | writel(mifcfg, gp->regs + MIF_CFG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | |
| 2092 | if (wol && gp->has_wol) { |
| 2093 | unsigned char *e = &gp->dev->dev_addr[0]; |
| 2094 | u32 csr; |
| 2095 | |
| 2096 | /* Setup wake-on-lan for MAGIC packet */ |
| 2097 | writel(MAC_RXCFG_HFE | MAC_RXCFG_SFCS | MAC_RXCFG_ENAB, |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2098 | gp->regs + MAC_RXCFG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | writel((e[4] << 8) | e[5], gp->regs + WOL_MATCH0); |
| 2100 | writel((e[2] << 8) | e[3], gp->regs + WOL_MATCH1); |
| 2101 | writel((e[0] << 8) | e[1], gp->regs + WOL_MATCH2); |
| 2102 | |
| 2103 | writel(WOL_MCOUNT_N | WOL_MCOUNT_M, gp->regs + WOL_MCOUNT); |
| 2104 | csr = WOL_WAKECSR_ENABLE; |
| 2105 | if ((readl(gp->regs + MAC_XIFCFG) & MAC_XIFCFG_GMII) == 0) |
| 2106 | csr |= WOL_WAKECSR_MII; |
| 2107 | writel(csr, gp->regs + WOL_WAKECSR); |
| 2108 | } else { |
| 2109 | writel(0, gp->regs + MAC_RXCFG); |
| 2110 | (void)readl(gp->regs + MAC_RXCFG); |
| 2111 | /* Machine sleep will die in strange ways if we |
| 2112 | * dont wait a bit here, looks like the chip takes |
| 2113 | * some time to really shut down |
| 2114 | */ |
| 2115 | msleep(10); |
| 2116 | } |
| 2117 | |
| 2118 | writel(0, gp->regs + MAC_TXCFG); |
| 2119 | writel(0, gp->regs + MAC_XIFCFG); |
| 2120 | writel(0, gp->regs + TXDMA_CFG); |
| 2121 | writel(0, gp->regs + RXDMA_CFG); |
| 2122 | |
| 2123 | if (!wol) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | gem_reset(gp); |
| 2125 | writel(MAC_TXRST_CMD, gp->regs + MAC_TXRST); |
| 2126 | writel(MAC_RXRST_CMD, gp->regs + MAC_RXRST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | |
| 2128 | if (found_mii_phy(gp) && gp->phy_mii.def->ops->suspend) |
| 2129 | gp->phy_mii.def->ops->suspend(&gp->phy_mii); |
| 2130 | |
| 2131 | /* According to Apple, we must set the MDIO pins to this begnign |
| 2132 | * state or we may 1) eat more current, 2) damage some PHYs |
| 2133 | */ |
David S. Miller | 7fb76aa | 2006-01-31 17:09:20 -0800 | [diff] [blame] | 2134 | writel(mifcfg | MIF_CFG_BBMODE, gp->regs + MIF_CFG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | writel(0, gp->regs + MIF_BBCLK); |
| 2136 | writel(0, gp->regs + MIF_BBDATA); |
| 2137 | writel(0, gp->regs + MIF_BBOENAB); |
| 2138 | writel(MAC_XIFCFG_GMII | MAC_XIFCFG_LBCK, gp->regs + MAC_XIFCFG); |
| 2139 | (void) readl(gp->regs + MAC_XIFCFG); |
| 2140 | } |
| 2141 | } |
| 2142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | static int gem_do_start(struct net_device *dev) |
| 2144 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2145 | struct gem *gp = netdev_priv(dev); |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2146 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | |
| 2148 | /* Enable the cell */ |
| 2149 | gem_get_cell(gp); |
| 2150 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2151 | /* Make sure PCI access and bus master are enabled */ |
| 2152 | rc = pci_enable_device(gp->pdev); |
| 2153 | if (rc) { |
| 2154 | netdev_err(dev, "Failed to enable chip on PCI bus !\n"); |
| 2155 | |
| 2156 | /* Put cell and forget it for now, it will be considered as |
| 2157 | * still asleep, a new sleep cycle may bring it back |
| 2158 | */ |
| 2159 | gem_put_cell(gp); |
| 2160 | return -ENXIO; |
| 2161 | } |
| 2162 | pci_set_master(gp->pdev); |
| 2163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | /* Init & setup chip hardware */ |
| 2165 | gem_reinit_chip(gp); |
| 2166 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2167 | /* An interrupt might come in handy */ |
| 2168 | rc = request_irq(gp->pdev->irq, gem_interrupt, |
| 2169 | IRQF_SHARED, dev->name, (void *)dev); |
| 2170 | if (rc) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2171 | netdev_err(dev, "failed to request irq !\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | gem_reset(gp); |
| 2174 | gem_clean_rings(gp); |
| 2175 | gem_put_cell(gp); |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2176 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | } |
| 2178 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2179 | /* Mark us as attached again if we come from resume(), this has |
| 2180 | * no effect if we weren't detatched and needs to be done now. |
| 2181 | */ |
| 2182 | netif_device_attach(dev); |
| 2183 | |
| 2184 | /* Restart NAPI & queues */ |
| 2185 | gem_netif_start(gp); |
| 2186 | |
| 2187 | /* Detect & init PHY, start autoneg etc... this will |
| 2188 | * eventually result in starting DMA operations when |
| 2189 | * the link is up |
| 2190 | */ |
| 2191 | gem_init_phy(gp); |
| 2192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | return 0; |
| 2194 | } |
| 2195 | |
| 2196 | static void gem_do_stop(struct net_device *dev, int wol) |
| 2197 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2198 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2200 | /* Stop NAPI and stop tx queue */ |
| 2201 | gem_netif_stop(gp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2203 | /* Make sure ints are disabled. We don't care about |
| 2204 | * synchronizing as NAPI is disabled, thus a stray |
| 2205 | * interrupt will do nothing bad (our irq handler |
| 2206 | * just schedules NAPI) |
| 2207 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | gem_disable_ints(gp); |
| 2209 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2210 | /* Stop the link timer */ |
| 2211 | del_timer_sync(&gp->link_timer); |
| 2212 | |
| 2213 | /* We cannot cancel the reset task while holding the |
| 2214 | * rtnl lock, we'd get an A->B / B->A deadlock stituation |
| 2215 | * if we did. This is not an issue however as the reset |
| 2216 | * task is synchronized vs. us (rtnl_lock) and will do |
| 2217 | * nothing if the device is down or suspended. We do |
| 2218 | * still clear reset_task_pending to avoid a spurrious |
| 2219 | * reset later on in case we do resume before it gets |
| 2220 | * scheduled. |
| 2221 | */ |
| 2222 | gp->reset_task_pending = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | |
| 2224 | /* If we are going to sleep with WOL */ |
| 2225 | gem_stop_dma(gp); |
| 2226 | msleep(10); |
| 2227 | if (!wol) |
| 2228 | gem_reset(gp); |
| 2229 | msleep(10); |
| 2230 | |
| 2231 | /* Get rid of rings */ |
| 2232 | gem_clean_rings(gp); |
| 2233 | |
| 2234 | /* No irq needed anymore */ |
| 2235 | free_irq(gp->pdev->irq, (void *) dev); |
| 2236 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2237 | /* Shut the PHY down eventually and setup WOL */ |
| 2238 | gem_stop_phy(gp, wol); |
| 2239 | |
| 2240 | /* Make sure bus master is disabled */ |
| 2241 | pci_disable_device(gp->pdev); |
| 2242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2243 | /* Cell not needed neither if no WOL */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2244 | if (!wol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | gem_put_cell(gp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | } |
| 2247 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2248 | static void gem_reset_task(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2250 | struct gem *gp = container_of(work, struct gem, reset_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2252 | /* Lock out the network stack (essentially shield ourselves |
| 2253 | * against a racing open, close, control call, or suspend |
| 2254 | */ |
| 2255 | rtnl_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2257 | /* Skip the reset task if suspended or closed, or if it's |
| 2258 | * been cancelled by gem_do_stop (see comment there) |
| 2259 | */ |
| 2260 | if (!netif_device_present(gp->dev) || |
| 2261 | !netif_running(gp->dev) || |
| 2262 | !gp->reset_task_pending) { |
| 2263 | rtnl_unlock(); |
| 2264 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | } |
Johannes Berg | dde655c | 2007-11-29 21:51:36 +1100 | [diff] [blame] | 2266 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2267 | /* Stop the link timer */ |
| 2268 | del_timer_sync(&gp->link_timer); |
| 2269 | |
| 2270 | /* Stop NAPI and tx */ |
| 2271 | gem_netif_stop(gp); |
| 2272 | |
| 2273 | /* Reset the chip & rings */ |
| 2274 | gem_reinit_chip(gp); |
| 2275 | if (gp->lstate == link_up) |
| 2276 | gem_set_link_modes(gp); |
| 2277 | |
| 2278 | /* Restart NAPI and Tx */ |
| 2279 | gem_netif_start(gp); |
| 2280 | |
| 2281 | /* We are back ! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | gp->reset_task_pending = 0; |
| 2283 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2284 | /* If the link is not up, restart autoneg, else restart the |
| 2285 | * polling timer |
| 2286 | */ |
| 2287 | if (gp->lstate != link_up) |
| 2288 | gem_begin_auto_negotiation(gp, NULL); |
| 2289 | else |
| 2290 | mod_timer(&gp->link_timer, jiffies + ((12 * HZ) / 10)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2292 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | } |
| 2294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2295 | static int gem_open(struct net_device *dev) |
| 2296 | { |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2297 | /* We allow open while suspended, we just do nothing, |
| 2298 | * the chip will be initialized in resume() |
| 2299 | */ |
| 2300 | if (netif_device_present(dev)) |
| 2301 | return gem_do_start(dev); |
| 2302 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2303 | } |
| 2304 | |
| 2305 | static int gem_close(struct net_device *dev) |
| 2306 | { |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2307 | if (netif_device_present(dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | gem_do_stop(dev, 0); |
| 2309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | return 0; |
| 2311 | } |
| 2312 | |
| 2313 | #ifdef CONFIG_PM |
| 2314 | static int gem_suspend(struct pci_dev *pdev, pm_message_t state) |
| 2315 | { |
| 2316 | struct net_device *dev = pci_get_drvdata(pdev); |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2317 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2319 | /* Lock the network stack first to avoid racing with open/close, |
| 2320 | * reset task and setting calls |
| 2321 | */ |
| 2322 | rtnl_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2324 | /* Not running, mark ourselves non-present, no need for |
| 2325 | * a lock here |
| 2326 | */ |
| 2327 | if (!netif_running(dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2328 | netif_device_detach(dev); |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2329 | rtnl_unlock(); |
| 2330 | return 0; |
| 2331 | } |
| 2332 | netdev_info(dev, "suspending, WakeOnLan %s\n", |
| 2333 | (gp->wake_on_lan && netif_running(dev)) ? |
| 2334 | "enabled" : "disabled"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2335 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2336 | /* Tell the network stack we're gone. gem_do_stop() below will |
| 2337 | * synchronize with TX, stop NAPI etc... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2339 | netif_device_detach(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2341 | /* Switch off chip, remember WOL setting */ |
Gerard Lledo | 5a8887d | 2012-04-28 08:52:37 +0000 | [diff] [blame] | 2342 | gp->asleep_wol = !!gp->wake_on_lan; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2343 | gem_do_stop(dev, gp->asleep_wol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2345 | /* Unlock the network stack */ |
| 2346 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | |
| 2348 | return 0; |
| 2349 | } |
| 2350 | |
| 2351 | static int gem_resume(struct pci_dev *pdev) |
| 2352 | { |
| 2353 | struct net_device *dev = pci_get_drvdata(pdev); |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2354 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2356 | /* See locking comment in gem_suspend */ |
| 2357 | rtnl_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2359 | /* Not running, mark ourselves present, no need for |
| 2360 | * a lock here |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2361 | */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2362 | if (!netif_running(dev)) { |
| 2363 | netif_device_attach(dev); |
| 2364 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | return 0; |
| 2366 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2368 | /* Restart chip. If that fails there isn't much we can do, we |
| 2369 | * leave things stopped. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2371 | gem_do_start(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | |
| 2373 | /* If we had WOL enabled, the cell clock was never turned off during |
| 2374 | * sleep, so we end up beeing unbalanced. Fix that here |
| 2375 | */ |
| 2376 | if (gp->asleep_wol) |
| 2377 | gem_put_cell(gp); |
| 2378 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2379 | /* Unlock the network stack */ |
| 2380 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | |
| 2382 | return 0; |
| 2383 | } |
| 2384 | #endif /* CONFIG_PM */ |
| 2385 | |
| 2386 | static struct net_device_stats *gem_get_stats(struct net_device *dev) |
| 2387 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2388 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2390 | /* I have seen this being called while the PM was in progress, |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2391 | * so we shield against this. Let's also not poke at registers |
| 2392 | * while the reset task is going on. |
| 2393 | * |
| 2394 | * TODO: Move stats collection elsewhere (link timer ?) and |
| 2395 | * make this a nop to avoid all those synchro issues |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2397 | if (!netif_device_present(dev) || !netif_running(dev)) |
| 2398 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2400 | /* Better safe than sorry... */ |
| 2401 | if (WARN_ON(!gp->cell_enabled)) |
| 2402 | goto bail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2404 | dev->stats.rx_crc_errors += readl(gp->regs + MAC_FCSERR); |
| 2405 | writel(0, gp->regs + MAC_FCSERR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2407 | dev->stats.rx_frame_errors += readl(gp->regs + MAC_AERR); |
| 2408 | writel(0, gp->regs + MAC_AERR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2410 | dev->stats.rx_length_errors += readl(gp->regs + MAC_LERR); |
| 2411 | writel(0, gp->regs + MAC_LERR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2413 | dev->stats.tx_aborted_errors += readl(gp->regs + MAC_ECOLL); |
| 2414 | dev->stats.collisions += |
| 2415 | (readl(gp->regs + MAC_ECOLL) + readl(gp->regs + MAC_LCOLL)); |
| 2416 | writel(0, gp->regs + MAC_ECOLL); |
| 2417 | writel(0, gp->regs + MAC_LCOLL); |
| 2418 | bail: |
Denis Kirjanov | aae7c47 | 2011-01-27 09:54:12 +0000 | [diff] [blame] | 2419 | return &dev->stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | } |
| 2421 | |
Ruben Vandeginste | 09c72ec | 2007-03-26 14:43:49 -0700 | [diff] [blame] | 2422 | static int gem_set_mac_address(struct net_device *dev, void *addr) |
| 2423 | { |
| 2424 | struct sockaddr *macaddr = (struct sockaddr *) addr; |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2425 | struct gem *gp = netdev_priv(dev); |
Ruben Vandeginste | 09c72ec | 2007-03-26 14:43:49 -0700 | [diff] [blame] | 2426 | unsigned char *e = &dev->dev_addr[0]; |
| 2427 | |
| 2428 | if (!is_valid_ether_addr(macaddr->sa_data)) |
| 2429 | return -EADDRNOTAVAIL; |
| 2430 | |
Ruben Vandeginste | 09c72ec | 2007-03-26 14:43:49 -0700 | [diff] [blame] | 2431 | memcpy(dev->dev_addr, macaddr->sa_data, dev->addr_len); |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2432 | |
| 2433 | /* We'll just catch it later when the device is up'd or resumed */ |
| 2434 | if (!netif_running(dev) || !netif_device_present(dev)) |
| 2435 | return 0; |
| 2436 | |
| 2437 | /* Better safe than sorry... */ |
| 2438 | if (WARN_ON(!gp->cell_enabled)) |
| 2439 | return 0; |
| 2440 | |
| 2441 | writel((e[4] << 8) | e[5], gp->regs + MAC_ADDR0); |
| 2442 | writel((e[2] << 8) | e[3], gp->regs + MAC_ADDR1); |
| 2443 | writel((e[0] << 8) | e[1], gp->regs + MAC_ADDR2); |
Ruben Vandeginste | 09c72ec | 2007-03-26 14:43:49 -0700 | [diff] [blame] | 2444 | |
| 2445 | return 0; |
| 2446 | } |
| 2447 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | static void gem_set_multicast(struct net_device *dev) |
| 2449 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2450 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | u32 rxcfg, rxcfg_new; |
| 2452 | int limit = 10000; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2453 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2454 | if (!netif_running(dev) || !netif_device_present(dev)) |
| 2455 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2457 | /* Better safe than sorry... */ |
| 2458 | if (gp->reset_task_pending || WARN_ON(!gp->cell_enabled)) |
| 2459 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | |
| 2461 | rxcfg = readl(gp->regs + MAC_RXCFG); |
| 2462 | rxcfg_new = gem_setup_multicast(gp); |
| 2463 | #ifdef STRIP_FCS |
| 2464 | rxcfg_new |= MAC_RXCFG_SFCS; |
| 2465 | #endif |
| 2466 | gp->mac_rx_cfg = rxcfg_new; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | writel(rxcfg & ~MAC_RXCFG_ENAB, gp->regs + MAC_RXCFG); |
| 2469 | while (readl(gp->regs + MAC_RXCFG) & MAC_RXCFG_ENAB) { |
| 2470 | if (!limit--) |
| 2471 | break; |
| 2472 | udelay(10); |
| 2473 | } |
| 2474 | |
| 2475 | rxcfg &= ~(MAC_RXCFG_PROM | MAC_RXCFG_HFE); |
| 2476 | rxcfg |= rxcfg_new; |
| 2477 | |
| 2478 | writel(rxcfg, gp->regs + MAC_RXCFG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | } |
| 2480 | |
| 2481 | /* Jumbo-grams don't seem to work :-( */ |
| 2482 | #define GEM_MIN_MTU 68 |
| 2483 | #if 1 |
| 2484 | #define GEM_MAX_MTU 1500 |
| 2485 | #else |
| 2486 | #define GEM_MAX_MTU 9000 |
| 2487 | #endif |
| 2488 | |
| 2489 | static int gem_change_mtu(struct net_device *dev, int new_mtu) |
| 2490 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2491 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | |
| 2493 | if (new_mtu < GEM_MIN_MTU || new_mtu > GEM_MAX_MTU) |
| 2494 | return -EINVAL; |
| 2495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | dev->mtu = new_mtu; |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2497 | |
| 2498 | /* We'll just catch it later when the device is up'd or resumed */ |
| 2499 | if (!netif_running(dev) || !netif_device_present(dev)) |
| 2500 | return 0; |
| 2501 | |
| 2502 | /* Better safe than sorry... */ |
| 2503 | if (WARN_ON(!gp->cell_enabled)) |
| 2504 | return 0; |
| 2505 | |
| 2506 | gem_netif_stop(gp); |
| 2507 | gem_reinit_chip(gp); |
| 2508 | if (gp->lstate == link_up) |
| 2509 | gem_set_link_modes(gp); |
| 2510 | gem_netif_start(gp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | |
| 2512 | return 0; |
| 2513 | } |
| 2514 | |
| 2515 | static void gem_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| 2516 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2517 | struct gem *gp = netdev_priv(dev); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2518 | |
Rick Jones | 23020ab | 2011-11-09 09:58:07 +0000 | [diff] [blame] | 2519 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
| 2520 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); |
| 2521 | strlcpy(info->bus_info, pci_name(gp->pdev), sizeof(info->bus_info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2523 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | static int gem_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 2525 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2526 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | |
| 2528 | if (gp->phy_type == phy_mii_mdio0 || |
| 2529 | gp->phy_type == phy_mii_mdio1) { |
| 2530 | if (gp->phy_mii.def) |
| 2531 | cmd->supported = gp->phy_mii.def->features; |
| 2532 | else |
| 2533 | cmd->supported = (SUPPORTED_10baseT_Half | |
| 2534 | SUPPORTED_10baseT_Full); |
| 2535 | |
| 2536 | /* XXX hardcoded stuff for now */ |
| 2537 | cmd->port = PORT_MII; |
| 2538 | cmd->transceiver = XCVR_EXTERNAL; |
| 2539 | cmd->phy_address = 0; /* XXX fixed PHYAD */ |
| 2540 | |
| 2541 | /* Return current PHY settings */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | cmd->autoneg = gp->want_autoneg; |
David Decotigny | 7073949 | 2011-04-27 18:32:40 +0000 | [diff] [blame] | 2543 | ethtool_cmd_speed_set(cmd, gp->phy_mii.speed); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2544 | cmd->duplex = gp->phy_mii.duplex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | cmd->advertising = gp->phy_mii.advertising; |
| 2546 | |
| 2547 | /* If we started with a forced mode, we don't have a default |
| 2548 | * advertise set, we need to return something sensible so |
| 2549 | * userland can re-enable autoneg properly. |
| 2550 | */ |
| 2551 | if (cmd->advertising == 0) |
| 2552 | cmd->advertising = cmd->supported; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2553 | } else { // XXX PCS ? |
| 2554 | cmd->supported = |
| 2555 | (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | |
| 2556 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | |
| 2557 | SUPPORTED_Autoneg); |
| 2558 | cmd->advertising = cmd->supported; |
David Decotigny | 7073949 | 2011-04-27 18:32:40 +0000 | [diff] [blame] | 2559 | ethtool_cmd_speed_set(cmd, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | cmd->duplex = cmd->port = cmd->phy_address = |
| 2561 | cmd->transceiver = cmd->autoneg = 0; |
Hermann Lauer | fbf0229 | 2008-12-09 15:39:14 -0800 | [diff] [blame] | 2562 | |
| 2563 | /* serdes means usually a Fibre connector, with most fixed */ |
| 2564 | if (gp->phy_type == phy_serdes) { |
| 2565 | cmd->port = PORT_FIBRE; |
| 2566 | cmd->supported = (SUPPORTED_1000baseT_Half | |
| 2567 | SUPPORTED_1000baseT_Full | |
| 2568 | SUPPORTED_FIBRE | SUPPORTED_Autoneg | |
| 2569 | SUPPORTED_Pause | SUPPORTED_Asym_Pause); |
| 2570 | cmd->advertising = cmd->supported; |
| 2571 | cmd->transceiver = XCVR_INTERNAL; |
| 2572 | if (gp->lstate == link_up) |
David Decotigny | 7073949 | 2011-04-27 18:32:40 +0000 | [diff] [blame] | 2573 | ethtool_cmd_speed_set(cmd, SPEED_1000); |
Hermann Lauer | fbf0229 | 2008-12-09 15:39:14 -0800 | [diff] [blame] | 2574 | cmd->duplex = DUPLEX_FULL; |
| 2575 | cmd->autoneg = 1; |
| 2576 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | } |
| 2578 | cmd->maxtxpkt = cmd->maxrxpkt = 0; |
| 2579 | |
| 2580 | return 0; |
| 2581 | } |
| 2582 | |
| 2583 | static int gem_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 2584 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2585 | struct gem *gp = netdev_priv(dev); |
David Decotigny | 25db033 | 2011-04-27 18:32:39 +0000 | [diff] [blame] | 2586 | u32 speed = ethtool_cmd_speed(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | |
| 2588 | /* Verify the settings we care about. */ |
| 2589 | if (cmd->autoneg != AUTONEG_ENABLE && |
| 2590 | cmd->autoneg != AUTONEG_DISABLE) |
| 2591 | return -EINVAL; |
| 2592 | |
| 2593 | if (cmd->autoneg == AUTONEG_ENABLE && |
| 2594 | cmd->advertising == 0) |
| 2595 | return -EINVAL; |
| 2596 | |
| 2597 | if (cmd->autoneg == AUTONEG_DISABLE && |
David Decotigny | 25db033 | 2011-04-27 18:32:39 +0000 | [diff] [blame] | 2598 | ((speed != SPEED_1000 && |
| 2599 | speed != SPEED_100 && |
| 2600 | speed != SPEED_10) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | (cmd->duplex != DUPLEX_HALF && |
| 2602 | cmd->duplex != DUPLEX_FULL))) |
| 2603 | return -EINVAL; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | /* Apply settings and restart link process. */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2606 | if (netif_device_present(gp->dev)) { |
| 2607 | del_timer_sync(&gp->link_timer); |
| 2608 | gem_begin_auto_negotiation(gp, cmd); |
| 2609 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | |
| 2611 | return 0; |
| 2612 | } |
| 2613 | |
| 2614 | static int gem_nway_reset(struct net_device *dev) |
| 2615 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2616 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | |
| 2618 | if (!gp->want_autoneg) |
| 2619 | return -EINVAL; |
| 2620 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2621 | /* Restart link process */ |
| 2622 | if (netif_device_present(gp->dev)) { |
| 2623 | del_timer_sync(&gp->link_timer); |
| 2624 | gem_begin_auto_negotiation(gp, NULL); |
| 2625 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | |
| 2627 | return 0; |
| 2628 | } |
| 2629 | |
| 2630 | static u32 gem_get_msglevel(struct net_device *dev) |
| 2631 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2632 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | return gp->msg_enable; |
| 2634 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | static void gem_set_msglevel(struct net_device *dev, u32 value) |
| 2637 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2638 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | gp->msg_enable = value; |
| 2640 | } |
| 2641 | |
| 2642 | |
| 2643 | /* Add more when I understand how to program the chip */ |
| 2644 | /* like WAKE_UCAST | WAKE_MCAST | WAKE_BCAST */ |
| 2645 | |
| 2646 | #define WOL_SUPPORTED_MASK (WAKE_MAGIC) |
| 2647 | |
| 2648 | static void gem_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 2649 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2650 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | |
| 2652 | /* Add more when I understand how to program the chip */ |
| 2653 | if (gp->has_wol) { |
| 2654 | wol->supported = WOL_SUPPORTED_MASK; |
| 2655 | wol->wolopts = gp->wake_on_lan; |
| 2656 | } else { |
| 2657 | wol->supported = 0; |
| 2658 | wol->wolopts = 0; |
| 2659 | } |
| 2660 | } |
| 2661 | |
| 2662 | static int gem_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) |
| 2663 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2664 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | |
| 2666 | if (!gp->has_wol) |
| 2667 | return -EOPNOTSUPP; |
| 2668 | gp->wake_on_lan = wol->wolopts & WOL_SUPPORTED_MASK; |
| 2669 | return 0; |
| 2670 | } |
| 2671 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 2672 | static const struct ethtool_ops gem_ethtool_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2673 | .get_drvinfo = gem_get_drvinfo, |
| 2674 | .get_link = ethtool_op_get_link, |
| 2675 | .get_settings = gem_get_settings, |
| 2676 | .set_settings = gem_set_settings, |
| 2677 | .nway_reset = gem_nway_reset, |
| 2678 | .get_msglevel = gem_get_msglevel, |
| 2679 | .set_msglevel = gem_set_msglevel, |
| 2680 | .get_wol = gem_get_wol, |
| 2681 | .set_wol = gem_set_wol, |
| 2682 | }; |
| 2683 | |
| 2684 | static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| 2685 | { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2686 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2687 | struct mii_ioctl_data *data = if_mii(ifr); |
| 2688 | int rc = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2690 | /* For SIOCGMIIREG and SIOCSMIIREG the core checks for us that |
| 2691 | * netif_device_present() is true and holds rtnl_lock for us |
| 2692 | * so we have nothing to worry about |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2693 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | |
| 2695 | switch (cmd) { |
| 2696 | case SIOCGMIIPHY: /* Get address of MII PHY in use. */ |
| 2697 | data->phy_id = gp->mii_phy_addr; |
| 2698 | /* Fallthrough... */ |
| 2699 | |
| 2700 | case SIOCGMIIREG: /* Read MII PHY register. */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2701 | data->val_out = __phy_read(gp, data->phy_id & 0x1f, |
| 2702 | data->reg_num & 0x1f); |
| 2703 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2704 | break; |
| 2705 | |
| 2706 | case SIOCSMIIREG: /* Write MII PHY register. */ |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2707 | __phy_write(gp, data->phy_id & 0x1f, data->reg_num & 0x1f, |
| 2708 | data->val_in); |
| 2709 | rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2710 | break; |
Joe Perches | 6403eab | 2011-06-03 11:51:20 +0000 | [diff] [blame] | 2711 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | return rc; |
| 2713 | } |
| 2714 | |
David S. Miller | dadb830 | 2007-02-28 15:42:50 -0800 | [diff] [blame] | 2715 | #if (!defined(CONFIG_SPARC) && !defined(CONFIG_PPC_PMAC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2716 | /* Fetch MAC address from vital product data of PCI ROM. */ |
Linus Torvalds | 4120b02 | 2005-09-11 09:26:20 -0700 | [diff] [blame] | 2717 | static int find_eth_addr_in_vpd(void __iomem *rom_base, int len, unsigned char *dev_addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | { |
| 2719 | int this_offset; |
| 2720 | |
| 2721 | for (this_offset = 0x20; this_offset < len; this_offset++) { |
| 2722 | void __iomem *p = rom_base + this_offset; |
| 2723 | int i; |
| 2724 | |
| 2725 | if (readb(p + 0) != 0x90 || |
| 2726 | readb(p + 1) != 0x00 || |
| 2727 | readb(p + 2) != 0x09 || |
| 2728 | readb(p + 3) != 0x4e || |
| 2729 | readb(p + 4) != 0x41 || |
| 2730 | readb(p + 5) != 0x06) |
| 2731 | continue; |
| 2732 | |
| 2733 | this_offset += 6; |
| 2734 | p += 6; |
| 2735 | |
| 2736 | for (i = 0; i < 6; i++) |
| 2737 | dev_addr[i] = readb(p + i); |
Linus Torvalds | 4120b02 | 2005-09-11 09:26:20 -0700 | [diff] [blame] | 2738 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | } |
Linus Torvalds | 4120b02 | 2005-09-11 09:26:20 -0700 | [diff] [blame] | 2740 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2741 | } |
| 2742 | |
| 2743 | static void get_gem_mac_nonobp(struct pci_dev *pdev, unsigned char *dev_addr) |
| 2744 | { |
Linus Torvalds | 4120b02 | 2005-09-11 09:26:20 -0700 | [diff] [blame] | 2745 | size_t size; |
| 2746 | void __iomem *p = pci_map_rom(pdev, &size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2747 | |
Linus Torvalds | 4120b02 | 2005-09-11 09:26:20 -0700 | [diff] [blame] | 2748 | if (p) { |
| 2749 | int found; |
| 2750 | |
| 2751 | found = readb(p) == 0x55 && |
| 2752 | readb(p + 1) == 0xaa && |
| 2753 | find_eth_addr_in_vpd(p, (64 * 1024), dev_addr); |
| 2754 | pci_unmap_rom(pdev, p); |
| 2755 | if (found) |
| 2756 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | } |
| 2758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | /* Sun MAC prefix then 3 random bytes. */ |
| 2760 | dev_addr[0] = 0x08; |
| 2761 | dev_addr[1] = 0x00; |
| 2762 | dev_addr[2] = 0x20; |
| 2763 | get_random_bytes(dev_addr + 3, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2764 | } |
| 2765 | #endif /* not Sparc and not PPC */ |
| 2766 | |
| 2767 | static int __devinit gem_get_device_address(struct gem *gp) |
| 2768 | { |
David S. Miller | dadb830 | 2007-02-28 15:42:50 -0800 | [diff] [blame] | 2769 | #if defined(CONFIG_SPARC) || defined(CONFIG_PPC_PMAC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | struct net_device *dev = gp->dev; |
Jeremy Kerr | 1a2509c | 2006-07-12 15:41:03 +1000 | [diff] [blame] | 2771 | const unsigned char *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | |
Stephen Rothwell | 40cd3a4 | 2007-05-01 13:54:02 +1000 | [diff] [blame] | 2773 | addr = of_get_property(gp->of_node, "local-mac-address", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2774 | if (addr == NULL) { |
David S. Miller | 457e1a8 | 2007-03-29 01:36:44 -0700 | [diff] [blame] | 2775 | #ifdef CONFIG_SPARC |
| 2776 | addr = idprom->id_ethaddr; |
| 2777 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | printk("\n"); |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2779 | pr_err("%s: can't get mac-address\n", dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2780 | return -1; |
David S. Miller | 457e1a8 | 2007-03-29 01:36:44 -0700 | [diff] [blame] | 2781 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2782 | } |
| 2783 | memcpy(dev->dev_addr, addr, 6); |
| 2784 | #else |
| 2785 | get_gem_mac_nonobp(gp->pdev, gp->dev->dev_addr); |
| 2786 | #endif |
| 2787 | return 0; |
| 2788 | } |
| 2789 | |
Adrian Bunk | 1490439 | 2005-12-21 18:50:12 -0800 | [diff] [blame] | 2790 | static void gem_remove_one(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2791 | { |
| 2792 | struct net_device *dev = pci_get_drvdata(pdev); |
| 2793 | |
| 2794 | if (dev) { |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2795 | struct gem *gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | |
| 2797 | unregister_netdev(dev); |
| 2798 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2799 | /* Ensure reset task is truely gone */ |
Tejun Heo | fe8998c | 2010-12-12 16:45:14 +0100 | [diff] [blame] | 2800 | cancel_work_sync(&gp->reset_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2801 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | /* Free resources */ |
| 2803 | pci_free_consistent(pdev, |
| 2804 | sizeof(struct gem_init_block), |
| 2805 | gp->init_block, |
| 2806 | gp->gblock_dvma); |
| 2807 | iounmap(gp->regs); |
| 2808 | pci_release_regions(pdev); |
| 2809 | free_netdev(dev); |
| 2810 | |
| 2811 | pci_set_drvdata(pdev, NULL); |
| 2812 | } |
| 2813 | } |
| 2814 | |
Stephen Hemminger | d9a811d | 2009-01-07 17:28:54 -0800 | [diff] [blame] | 2815 | static const struct net_device_ops gem_netdev_ops = { |
| 2816 | .ndo_open = gem_open, |
| 2817 | .ndo_stop = gem_close, |
| 2818 | .ndo_start_xmit = gem_start_xmit, |
| 2819 | .ndo_get_stats = gem_get_stats, |
Jiri Pirko | afc4b13 | 2011-08-16 06:29:01 +0000 | [diff] [blame] | 2820 | .ndo_set_rx_mode = gem_set_multicast, |
Stephen Hemminger | d9a811d | 2009-01-07 17:28:54 -0800 | [diff] [blame] | 2821 | .ndo_do_ioctl = gem_ioctl, |
| 2822 | .ndo_tx_timeout = gem_tx_timeout, |
| 2823 | .ndo_change_mtu = gem_change_mtu, |
Stephen Hemminger | d9a811d | 2009-01-07 17:28:54 -0800 | [diff] [blame] | 2824 | .ndo_validate_addr = eth_validate_addr, |
Stephen Hemminger | 5ed0102 | 2009-03-19 23:58:01 -0700 | [diff] [blame] | 2825 | .ndo_set_mac_address = gem_set_mac_address, |
| 2826 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 2827 | .ndo_poll_controller = gem_poll_controller, |
| 2828 | #endif |
Stephen Hemminger | d9a811d | 2009-01-07 17:28:54 -0800 | [diff] [blame] | 2829 | }; |
| 2830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | static int __devinit gem_init_one(struct pci_dev *pdev, |
| 2832 | const struct pci_device_id *ent) |
| 2833 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2834 | unsigned long gemreg_base, gemreg_len; |
| 2835 | struct net_device *dev; |
| 2836 | struct gem *gp; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 2837 | int err, pci_using_dac; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2839 | printk_once(KERN_INFO "%s", version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2840 | |
| 2841 | /* Apple gmac note: during probe, the chip is powered up by |
| 2842 | * the arch code to allow the code below to work (and to let |
| 2843 | * the chip be probed on the config space. It won't stay powered |
| 2844 | * up until the interface is brought up however, so we can't rely |
| 2845 | * on register configuration done at this point. |
| 2846 | */ |
| 2847 | err = pci_enable_device(pdev); |
| 2848 | if (err) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2849 | pr_err("Cannot enable MMIO operation, aborting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | return err; |
| 2851 | } |
| 2852 | pci_set_master(pdev); |
| 2853 | |
| 2854 | /* Configure DMA attributes. */ |
| 2855 | |
| 2856 | /* All of the GEM documentation states that 64-bit DMA addressing |
| 2857 | * is fully supported and should work just fine. However the |
| 2858 | * front end for RIO based GEMs is different and only supports |
| 2859 | * 32-bit addressing. |
| 2860 | * |
| 2861 | * For now we assume the various PPC GEMs are 32-bit only as well. |
| 2862 | */ |
| 2863 | if (pdev->vendor == PCI_VENDOR_ID_SUN && |
| 2864 | pdev->device == PCI_DEVICE_ID_SUN_GEM && |
Yang Hongyang | 6a35528 | 2009-04-06 19:01:13 -0700 | [diff] [blame] | 2865 | !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2866 | pci_using_dac = 1; |
| 2867 | } else { |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 2868 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2869 | if (err) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2870 | pr_err("No usable DMA configuration, aborting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | goto err_disable_device; |
| 2872 | } |
| 2873 | pci_using_dac = 0; |
| 2874 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2875 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2876 | gemreg_base = pci_resource_start(pdev, 0); |
| 2877 | gemreg_len = pci_resource_len(pdev, 0); |
| 2878 | |
| 2879 | if ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) != 0) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2880 | pr_err("Cannot find proper PCI device base address, aborting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | err = -ENODEV; |
| 2882 | goto err_disable_device; |
| 2883 | } |
| 2884 | |
| 2885 | dev = alloc_etherdev(sizeof(*gp)); |
| 2886 | if (!dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | err = -ENOMEM; |
| 2888 | goto err_disable_device; |
| 2889 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2890 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 2891 | |
Wang Chen | 8f15ea4 | 2008-11-12 23:38:36 -0800 | [diff] [blame] | 2892 | gp = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | |
| 2894 | err = pci_request_regions(pdev, DRV_NAME); |
| 2895 | if (err) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2896 | pr_err("Cannot obtain PCI resources, aborting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2897 | goto err_out_free_netdev; |
| 2898 | } |
| 2899 | |
| 2900 | gp->pdev = pdev; |
| 2901 | dev->base_addr = (long) pdev; |
| 2902 | gp->dev = dev; |
| 2903 | |
| 2904 | gp->msg_enable = DEFAULT_MSG; |
| 2905 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2906 | init_timer(&gp->link_timer); |
| 2907 | gp->link_timer.function = gem_link_timer; |
| 2908 | gp->link_timer.data = (unsigned long) gp; |
| 2909 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 2910 | INIT_WORK(&gp->reset_task, gem_reset_task); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 2911 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2912 | gp->lstate = link_down; |
| 2913 | gp->timer_ticks = 0; |
| 2914 | netif_carrier_off(dev); |
| 2915 | |
| 2916 | gp->regs = ioremap(gemreg_base, gemreg_len); |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 2917 | if (!gp->regs) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2918 | pr_err("Cannot map device registers, aborting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2919 | err = -EIO; |
| 2920 | goto err_out_free_res; |
| 2921 | } |
| 2922 | |
| 2923 | /* On Apple, we want a reference to the Open Firmware device-tree |
| 2924 | * node. We use it for clock control. |
| 2925 | */ |
David S. Miller | 457e1a8 | 2007-03-29 01:36:44 -0700 | [diff] [blame] | 2926 | #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_SPARC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | gp->of_node = pci_device_to_OF_node(pdev); |
| 2928 | #endif |
| 2929 | |
| 2930 | /* Only Apple version supports WOL afaik */ |
| 2931 | if (pdev->vendor == PCI_VENDOR_ID_APPLE) |
| 2932 | gp->has_wol = 1; |
| 2933 | |
| 2934 | /* Make sure cell is enabled */ |
| 2935 | gem_get_cell(gp); |
| 2936 | |
| 2937 | /* Make sure everything is stopped and in init state */ |
| 2938 | gem_reset(gp); |
| 2939 | |
| 2940 | /* Fill up the mii_phy structure (even if we won't use it) */ |
| 2941 | gp->phy_mii.dev = dev; |
| 2942 | gp->phy_mii.mdio_read = _phy_read; |
| 2943 | gp->phy_mii.mdio_write = _phy_write; |
Benjamin Herrenschmidt | 3c326fe | 2005-07-07 17:56:09 -0700 | [diff] [blame] | 2944 | #ifdef CONFIG_PPC_PMAC |
| 2945 | gp->phy_mii.platform_data = gp->of_node; |
| 2946 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2947 | /* By default, we start with autoneg */ |
| 2948 | gp->want_autoneg = 1; |
| 2949 | |
| 2950 | /* Check fifo sizes, PHY type, etc... */ |
| 2951 | if (gem_check_invariants(gp)) { |
| 2952 | err = -ENODEV; |
| 2953 | goto err_out_iounmap; |
| 2954 | } |
| 2955 | |
| 2956 | /* It is guaranteed that the returned buffer will be at least |
| 2957 | * PAGE_SIZE aligned. |
| 2958 | */ |
| 2959 | gp->init_block = (struct gem_init_block *) |
| 2960 | pci_alloc_consistent(pdev, sizeof(struct gem_init_block), |
| 2961 | &gp->gblock_dvma); |
| 2962 | if (!gp->init_block) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2963 | pr_err("Cannot allocate init block, aborting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | err = -ENOMEM; |
| 2965 | goto err_out_iounmap; |
| 2966 | } |
| 2967 | |
| 2968 | if (gem_get_device_address(gp)) |
| 2969 | goto err_out_free_consistent; |
| 2970 | |
Stephen Hemminger | d9a811d | 2009-01-07 17:28:54 -0800 | [diff] [blame] | 2971 | dev->netdev_ops = &gem_netdev_ops; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2972 | netif_napi_add(dev, &gp->napi, gem_poll, 64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2973 | dev->ethtool_ops = &gem_ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | dev->watchdog_timeo = 5 * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | dev->irq = pdev->irq; |
| 2976 | dev->dma = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2977 | |
| 2978 | /* Set that now, in case PM kicks in now */ |
| 2979 | pci_set_drvdata(pdev, dev); |
| 2980 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2981 | /* We can do scatter/gather and HW checksum */ |
| 2982 | dev->hw_features = NETIF_F_SG | NETIF_F_HW_CSUM; |
| 2983 | dev->features |= dev->hw_features | NETIF_F_RXCSUM; |
| 2984 | if (pci_using_dac) |
| 2985 | dev->features |= NETIF_F_HIGHDMA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2986 | |
| 2987 | /* Register with kernel */ |
| 2988 | if (register_netdev(dev)) { |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 2989 | pr_err("Cannot register net device, aborting\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2990 | err = -ENOMEM; |
| 2991 | goto err_out_free_consistent; |
| 2992 | } |
| 2993 | |
Benjamin Herrenschmidt | fe09bb6 | 2011-06-01 17:17:10 +1000 | [diff] [blame] | 2994 | /* Undo the get_cell with appropriate locking (we could use |
| 2995 | * ndo_init/uninit but that would be even more clumsy imho) |
| 2996 | */ |
| 2997 | rtnl_lock(); |
| 2998 | gem_put_cell(gp); |
| 2999 | rtnl_unlock(); |
| 3000 | |
Joe Perches | c6c7598 | 2010-08-17 07:55:04 +0000 | [diff] [blame] | 3001 | netdev_info(dev, "Sun GEM (PCI) 10/100/1000BaseT Ethernet %pM\n", |
| 3002 | dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3003 | return 0; |
| 3004 | |
| 3005 | err_out_free_consistent: |
| 3006 | gem_remove_one(pdev); |
| 3007 | err_out_iounmap: |
| 3008 | gem_put_cell(gp); |
| 3009 | iounmap(gp->regs); |
| 3010 | |
| 3011 | err_out_free_res: |
| 3012 | pci_release_regions(pdev); |
| 3013 | |
| 3014 | err_out_free_netdev: |
| 3015 | free_netdev(dev); |
| 3016 | err_disable_device: |
| 3017 | pci_disable_device(pdev); |
| 3018 | return err; |
| 3019 | |
| 3020 | } |
| 3021 | |
| 3022 | |
| 3023 | static struct pci_driver gem_driver = { |
| 3024 | .name = GEM_MODULE_NAME, |
| 3025 | .id_table = gem_pci_tbl, |
| 3026 | .probe = gem_init_one, |
Adrian Bunk | 1490439 | 2005-12-21 18:50:12 -0800 | [diff] [blame] | 3027 | .remove = gem_remove_one, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3028 | #ifdef CONFIG_PM |
| 3029 | .suspend = gem_suspend, |
| 3030 | .resume = gem_resume, |
| 3031 | #endif /* CONFIG_PM */ |
| 3032 | }; |
| 3033 | |
| 3034 | static int __init gem_init(void) |
| 3035 | { |
Jeff Garzik | 2991762 | 2006-08-19 17:48:59 -0400 | [diff] [blame] | 3036 | return pci_register_driver(&gem_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3037 | } |
| 3038 | |
| 3039 | static void __exit gem_cleanup(void) |
| 3040 | { |
| 3041 | pci_unregister_driver(&gem_driver); |
| 3042 | } |
| 3043 | |
| 3044 | module_init(gem_init); |
| 3045 | module_exit(gem_cleanup); |