David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 1 | /* sunqe.c: Sparc QuadEthernet 10baseT SBUS card driver. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Once again I am out to prove that every ethernet |
| 3 | * controller out there can be most efficiently programmed |
| 4 | * if you make it look like a LANCE. |
| 5 | * |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 6 | * Copyright (C) 1996, 1999, 2003, 2006 David S. Miller (davem@davemloft.net) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/module.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/errno.h> |
| 13 | #include <linux/fcntl.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/ioport.h> |
| 16 | #include <linux/in.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/string.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/crc32.h> |
| 22 | #include <linux/netdevice.h> |
| 23 | #include <linux/etherdevice.h> |
| 24 | #include <linux/skbuff.h> |
| 25 | #include <linux/ethtool.h> |
| 26 | #include <linux/bitops.h> |
David S. Miller | 738f2b7 | 2008-08-27 18:09:11 -0700 | [diff] [blame] | 27 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | #include <asm/system.h> |
| 30 | #include <asm/io.h> |
| 31 | #include <asm/dma.h> |
| 32 | #include <asm/byteorder.h> |
| 33 | #include <asm/idprom.h> |
| 34 | #include <asm/sbus.h> |
| 35 | #include <asm/openprom.h> |
| 36 | #include <asm/oplib.h> |
| 37 | #include <asm/auxio.h> |
| 38 | #include <asm/pgtable.h> |
| 39 | #include <asm/irq.h> |
| 40 | |
| 41 | #include "sunqe.h" |
| 42 | |
Tom 'spot' Callaway | 1015828 | 2005-04-24 20:35:20 -0700 | [diff] [blame] | 43 | #define DRV_NAME "sunqe" |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 44 | #define DRV_VERSION "4.0" |
| 45 | #define DRV_RELDATE "June 23, 2006" |
| 46 | #define DRV_AUTHOR "David S. Miller (davem@davemloft.net)" |
Tom 'spot' Callaway | 1015828 | 2005-04-24 20:35:20 -0700 | [diff] [blame] | 47 | |
| 48 | static char version[] = |
| 49 | DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n"; |
| 50 | |
| 51 | MODULE_VERSION(DRV_VERSION); |
| 52 | MODULE_AUTHOR(DRV_AUTHOR); |
| 53 | MODULE_DESCRIPTION("Sun QuadEthernet 10baseT SBUS card driver"); |
| 54 | MODULE_LICENSE("GPL"); |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | static struct sunqec *root_qec_dev; |
| 57 | |
| 58 | static void qe_set_multicast(struct net_device *dev); |
| 59 | |
| 60 | #define QEC_RESET_TRIES 200 |
| 61 | |
| 62 | static inline int qec_global_reset(void __iomem *gregs) |
| 63 | { |
| 64 | int tries = QEC_RESET_TRIES; |
| 65 | |
| 66 | sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL); |
| 67 | while (--tries) { |
| 68 | u32 tmp = sbus_readl(gregs + GLOB_CTRL); |
| 69 | if (tmp & GLOB_CTRL_RESET) { |
| 70 | udelay(20); |
| 71 | continue; |
| 72 | } |
| 73 | break; |
| 74 | } |
| 75 | if (tries) |
| 76 | return 0; |
| 77 | printk(KERN_ERR "QuadEther: AIEEE cannot reset the QEC!\n"); |
| 78 | return -1; |
| 79 | } |
| 80 | |
| 81 | #define MACE_RESET_RETRIES 200 |
| 82 | #define QE_RESET_RETRIES 200 |
| 83 | |
| 84 | static inline int qe_stop(struct sunqe *qep) |
| 85 | { |
| 86 | void __iomem *cregs = qep->qcregs; |
| 87 | void __iomem *mregs = qep->mregs; |
| 88 | int tries; |
| 89 | |
| 90 | /* Reset the MACE, then the QEC channel. */ |
| 91 | sbus_writeb(MREGS_BCONFIG_RESET, mregs + MREGS_BCONFIG); |
| 92 | tries = MACE_RESET_RETRIES; |
| 93 | while (--tries) { |
| 94 | u8 tmp = sbus_readb(mregs + MREGS_BCONFIG); |
| 95 | if (tmp & MREGS_BCONFIG_RESET) { |
| 96 | udelay(20); |
| 97 | continue; |
| 98 | } |
| 99 | break; |
| 100 | } |
| 101 | if (!tries) { |
| 102 | printk(KERN_ERR "QuadEther: AIEEE cannot reset the MACE!\n"); |
| 103 | return -1; |
| 104 | } |
| 105 | |
| 106 | sbus_writel(CREG_CTRL_RESET, cregs + CREG_CTRL); |
| 107 | tries = QE_RESET_RETRIES; |
| 108 | while (--tries) { |
| 109 | u32 tmp = sbus_readl(cregs + CREG_CTRL); |
| 110 | if (tmp & CREG_CTRL_RESET) { |
| 111 | udelay(20); |
| 112 | continue; |
| 113 | } |
| 114 | break; |
| 115 | } |
| 116 | if (!tries) { |
| 117 | printk(KERN_ERR "QuadEther: Cannot reset QE channel!\n"); |
| 118 | return -1; |
| 119 | } |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | static void qe_init_rings(struct sunqe *qep) |
| 124 | { |
| 125 | struct qe_init_block *qb = qep->qe_block; |
| 126 | struct sunqe_buffers *qbufs = qep->buffers; |
| 127 | __u32 qbufs_dvma = qep->buffers_dvma; |
| 128 | int i; |
| 129 | |
| 130 | qep->rx_new = qep->rx_old = qep->tx_new = qep->tx_old = 0; |
| 131 | memset(qb, 0, sizeof(struct qe_init_block)); |
| 132 | memset(qbufs, 0, sizeof(struct sunqe_buffers)); |
| 133 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 134 | qb->qe_rxd[i].rx_addr = qbufs_dvma + qebuf_offset(rx_buf, i); |
| 135 | qb->qe_rxd[i].rx_flags = |
| 136 | (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH)); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | static int qe_init(struct sunqe *qep, int from_irq) |
| 141 | { |
| 142 | struct sunqec *qecp = qep->parent; |
| 143 | void __iomem *cregs = qep->qcregs; |
| 144 | void __iomem *mregs = qep->mregs; |
| 145 | void __iomem *gregs = qecp->gregs; |
| 146 | unsigned char *e = &qep->dev->dev_addr[0]; |
| 147 | u32 tmp; |
| 148 | int i; |
| 149 | |
| 150 | /* Shut it up. */ |
| 151 | if (qe_stop(qep)) |
| 152 | return -EAGAIN; |
| 153 | |
| 154 | /* Setup initial rx/tx init block pointers. */ |
| 155 | sbus_writel(qep->qblock_dvma + qib_offset(qe_rxd, 0), cregs + CREG_RXDS); |
| 156 | sbus_writel(qep->qblock_dvma + qib_offset(qe_txd, 0), cregs + CREG_TXDS); |
| 157 | |
| 158 | /* Enable/mask the various irq's. */ |
| 159 | sbus_writel(0, cregs + CREG_RIMASK); |
| 160 | sbus_writel(1, cregs + CREG_TIMASK); |
| 161 | |
| 162 | sbus_writel(0, cregs + CREG_QMASK); |
| 163 | sbus_writel(CREG_MMASK_RXCOLL, cregs + CREG_MMASK); |
| 164 | |
| 165 | /* Setup the FIFO pointers into QEC local memory. */ |
| 166 | tmp = qep->channel * sbus_readl(gregs + GLOB_MSIZE); |
| 167 | sbus_writel(tmp, cregs + CREG_RXRBUFPTR); |
| 168 | sbus_writel(tmp, cregs + CREG_RXWBUFPTR); |
| 169 | |
| 170 | tmp = sbus_readl(cregs + CREG_RXRBUFPTR) + |
| 171 | sbus_readl(gregs + GLOB_RSIZE); |
| 172 | sbus_writel(tmp, cregs + CREG_TXRBUFPTR); |
| 173 | sbus_writel(tmp, cregs + CREG_TXWBUFPTR); |
| 174 | |
| 175 | /* Clear the channel collision counter. */ |
| 176 | sbus_writel(0, cregs + CREG_CCNT); |
| 177 | |
| 178 | /* For 10baseT, inter frame space nor throttle seems to be necessary. */ |
| 179 | sbus_writel(0, cregs + CREG_PIPG); |
| 180 | |
| 181 | /* Now dork with the AMD MACE. */ |
| 182 | sbus_writeb(MREGS_PHYCONFIG_AUTO, mregs + MREGS_PHYCONFIG); |
| 183 | sbus_writeb(MREGS_TXFCNTL_AUTOPAD, mregs + MREGS_TXFCNTL); |
| 184 | sbus_writeb(0, mregs + MREGS_RXFCNTL); |
| 185 | |
| 186 | /* The QEC dma's the rx'd packets from local memory out to main memory, |
| 187 | * and therefore it interrupts when the packet reception is "complete". |
| 188 | * So don't listen for the MACE talking about it. |
| 189 | */ |
| 190 | sbus_writeb(MREGS_IMASK_COLL | MREGS_IMASK_RXIRQ, mregs + MREGS_IMASK); |
| 191 | sbus_writeb(MREGS_BCONFIG_BSWAP | MREGS_BCONFIG_64TS, mregs + MREGS_BCONFIG); |
| 192 | sbus_writeb((MREGS_FCONFIG_TXF16 | MREGS_FCONFIG_RXF32 | |
| 193 | MREGS_FCONFIG_RFWU | MREGS_FCONFIG_TFWU), |
| 194 | mregs + MREGS_FCONFIG); |
| 195 | |
| 196 | /* Only usable interface on QuadEther is twisted pair. */ |
| 197 | sbus_writeb(MREGS_PLSCONFIG_TP, mregs + MREGS_PLSCONFIG); |
| 198 | |
| 199 | /* Tell MACE we are changing the ether address. */ |
| 200 | sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_PARESET, |
| 201 | mregs + MREGS_IACONFIG); |
| 202 | while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) |
| 203 | barrier(); |
| 204 | sbus_writeb(e[0], mregs + MREGS_ETHADDR); |
| 205 | sbus_writeb(e[1], mregs + MREGS_ETHADDR); |
| 206 | sbus_writeb(e[2], mregs + MREGS_ETHADDR); |
| 207 | sbus_writeb(e[3], mregs + MREGS_ETHADDR); |
| 208 | sbus_writeb(e[4], mregs + MREGS_ETHADDR); |
| 209 | sbus_writeb(e[5], mregs + MREGS_ETHADDR); |
| 210 | |
| 211 | /* Clear out the address filter. */ |
| 212 | sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET, |
| 213 | mregs + MREGS_IACONFIG); |
| 214 | while ((sbus_readb(mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) |
| 215 | barrier(); |
| 216 | for (i = 0; i < 8; i++) |
| 217 | sbus_writeb(0, mregs + MREGS_FILTER); |
| 218 | |
| 219 | /* Address changes are now complete. */ |
| 220 | sbus_writeb(0, mregs + MREGS_IACONFIG); |
| 221 | |
| 222 | qe_init_rings(qep); |
| 223 | |
| 224 | /* Wait a little bit for the link to come up... */ |
| 225 | mdelay(5); |
| 226 | if (!(sbus_readb(mregs + MREGS_PHYCONFIG) & MREGS_PHYCONFIG_LTESTDIS)) { |
| 227 | int tries = 50; |
| 228 | |
| 229 | while (tries--) { |
| 230 | u8 tmp; |
| 231 | |
| 232 | mdelay(5); |
| 233 | barrier(); |
| 234 | tmp = sbus_readb(mregs + MREGS_PHYCONFIG); |
| 235 | if ((tmp & MREGS_PHYCONFIG_LSTAT) != 0) |
| 236 | break; |
| 237 | } |
| 238 | if (tries == 0) |
| 239 | printk(KERN_NOTICE "%s: Warning, link state is down.\n", qep->dev->name); |
| 240 | } |
| 241 | |
| 242 | /* Missed packet counter is cleared on a read. */ |
| 243 | sbus_readb(mregs + MREGS_MPCNT); |
| 244 | |
| 245 | /* Reload multicast information, this will enable the receiver |
| 246 | * and transmitter. |
| 247 | */ |
| 248 | qe_set_multicast(qep->dev); |
| 249 | |
| 250 | /* QEC should now start to show interrupts. */ |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | /* Grrr, certain error conditions completely lock up the AMD MACE, |
| 255 | * so when we get these we _must_ reset the chip. |
| 256 | */ |
| 257 | static int qe_is_bolixed(struct sunqe *qep, u32 qe_status) |
| 258 | { |
| 259 | struct net_device *dev = qep->dev; |
| 260 | int mace_hwbug_workaround = 0; |
| 261 | |
| 262 | if (qe_status & CREG_STAT_EDEFER) { |
| 263 | printk(KERN_ERR "%s: Excessive transmit defers.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 264 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | if (qe_status & CREG_STAT_CLOSS) { |
| 268 | printk(KERN_ERR "%s: Carrier lost, link down?\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 269 | dev->stats.tx_errors++; |
| 270 | dev->stats.tx_carrier_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | if (qe_status & CREG_STAT_ERETRIES) { |
| 274 | printk(KERN_ERR "%s: Excessive transmit retries (more than 16).\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 275 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | mace_hwbug_workaround = 1; |
| 277 | } |
| 278 | |
| 279 | if (qe_status & CREG_STAT_LCOLL) { |
| 280 | printk(KERN_ERR "%s: Late transmit collision.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 281 | dev->stats.tx_errors++; |
| 282 | dev->stats.collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | mace_hwbug_workaround = 1; |
| 284 | } |
| 285 | |
| 286 | if (qe_status & CREG_STAT_FUFLOW) { |
| 287 | printk(KERN_ERR "%s: Transmit fifo underflow, driver bug.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 288 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | mace_hwbug_workaround = 1; |
| 290 | } |
| 291 | |
| 292 | if (qe_status & CREG_STAT_JERROR) { |
| 293 | printk(KERN_ERR "%s: Jabber error.\n", dev->name); |
| 294 | } |
| 295 | |
| 296 | if (qe_status & CREG_STAT_BERROR) { |
| 297 | printk(KERN_ERR "%s: Babble error.\n", dev->name); |
| 298 | } |
| 299 | |
| 300 | if (qe_status & CREG_STAT_CCOFLOW) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 301 | dev->stats.tx_errors += 256; |
| 302 | dev->stats.collisions += 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | if (qe_status & CREG_STAT_TXDERROR) { |
| 306 | printk(KERN_ERR "%s: Transmit descriptor is bogus, driver bug.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 307 | dev->stats.tx_errors++; |
| 308 | dev->stats.tx_aborted_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | mace_hwbug_workaround = 1; |
| 310 | } |
| 311 | |
| 312 | if (qe_status & CREG_STAT_TXLERR) { |
| 313 | printk(KERN_ERR "%s: Transmit late error.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 314 | dev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | mace_hwbug_workaround = 1; |
| 316 | } |
| 317 | |
| 318 | if (qe_status & CREG_STAT_TXPERR) { |
| 319 | printk(KERN_ERR "%s: Transmit DMA parity error.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 320 | dev->stats.tx_errors++; |
| 321 | dev->stats.tx_aborted_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | mace_hwbug_workaround = 1; |
| 323 | } |
| 324 | |
| 325 | if (qe_status & CREG_STAT_TXSERR) { |
| 326 | printk(KERN_ERR "%s: Transmit DMA sbus error ack.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 327 | dev->stats.tx_errors++; |
| 328 | dev->stats.tx_aborted_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | mace_hwbug_workaround = 1; |
| 330 | } |
| 331 | |
| 332 | if (qe_status & CREG_STAT_RCCOFLOW) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 333 | dev->stats.rx_errors += 256; |
| 334 | dev->stats.collisions += 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | if (qe_status & CREG_STAT_RUOFLOW) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 338 | dev->stats.rx_errors += 256; |
| 339 | dev->stats.rx_over_errors += 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | if (qe_status & CREG_STAT_MCOFLOW) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 343 | dev->stats.rx_errors += 256; |
| 344 | dev->stats.rx_missed_errors += 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | if (qe_status & CREG_STAT_RXFOFLOW) { |
| 348 | printk(KERN_ERR "%s: Receive fifo overflow.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 349 | dev->stats.rx_errors++; |
| 350 | dev->stats.rx_over_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | if (qe_status & CREG_STAT_RLCOLL) { |
| 354 | printk(KERN_ERR "%s: Late receive collision.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 355 | dev->stats.rx_errors++; |
| 356 | dev->stats.collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | if (qe_status & CREG_STAT_FCOFLOW) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 360 | dev->stats.rx_errors += 256; |
| 361 | dev->stats.rx_frame_errors += 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | if (qe_status & CREG_STAT_CECOFLOW) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 365 | dev->stats.rx_errors += 256; |
| 366 | dev->stats.rx_crc_errors += 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | if (qe_status & CREG_STAT_RXDROP) { |
| 370 | printk(KERN_ERR "%s: Receive packet dropped.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 371 | dev->stats.rx_errors++; |
| 372 | dev->stats.rx_dropped++; |
| 373 | dev->stats.rx_missed_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | if (qe_status & CREG_STAT_RXSMALL) { |
| 377 | printk(KERN_ERR "%s: Receive buffer too small, driver bug.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 378 | dev->stats.rx_errors++; |
| 379 | dev->stats.rx_length_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | if (qe_status & CREG_STAT_RXLERR) { |
| 383 | printk(KERN_ERR "%s: Receive late error.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 384 | dev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | mace_hwbug_workaround = 1; |
| 386 | } |
| 387 | |
| 388 | if (qe_status & CREG_STAT_RXPERR) { |
| 389 | printk(KERN_ERR "%s: Receive DMA parity error.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 390 | dev->stats.rx_errors++; |
| 391 | dev->stats.rx_missed_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | mace_hwbug_workaround = 1; |
| 393 | } |
| 394 | |
| 395 | if (qe_status & CREG_STAT_RXSERR) { |
| 396 | printk(KERN_ERR "%s: Receive DMA sbus error ack.\n", dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 397 | dev->stats.rx_errors++; |
| 398 | dev->stats.rx_missed_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | mace_hwbug_workaround = 1; |
| 400 | } |
| 401 | |
| 402 | if (mace_hwbug_workaround) |
| 403 | qe_init(qep, 1); |
| 404 | return mace_hwbug_workaround; |
| 405 | } |
| 406 | |
| 407 | /* Per-QE receive interrupt service routine. Just like on the happy meal |
| 408 | * we receive directly into skb's with a small packet copy water mark. |
| 409 | */ |
| 410 | static void qe_rx(struct sunqe *qep) |
| 411 | { |
| 412 | struct qe_rxd *rxbase = &qep->qe_block->qe_rxd[0]; |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 413 | struct net_device *dev = qep->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | struct qe_rxd *this; |
| 415 | struct sunqe_buffers *qbufs = qep->buffers; |
| 416 | __u32 qbufs_dvma = qep->buffers_dvma; |
| 417 | int elem = qep->rx_new, drops = 0; |
| 418 | u32 flags; |
| 419 | |
| 420 | this = &rxbase[elem]; |
| 421 | while (!((flags = this->rx_flags) & RXD_OWN)) { |
| 422 | struct sk_buff *skb; |
| 423 | unsigned char *this_qbuf = |
| 424 | &qbufs->rx_buf[elem & (RX_RING_SIZE - 1)][0]; |
| 425 | __u32 this_qbuf_dvma = qbufs_dvma + |
| 426 | qebuf_offset(rx_buf, (elem & (RX_RING_SIZE - 1))); |
| 427 | struct qe_rxd *end_rxd = |
| 428 | &rxbase[(elem+RX_RING_SIZE)&(RX_RING_MAXSIZE-1)]; |
| 429 | int len = (flags & RXD_LENGTH) - 4; /* QE adds ether FCS size to len */ |
| 430 | |
| 431 | /* Check for errors. */ |
| 432 | if (len < ETH_ZLEN) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 433 | dev->stats.rx_errors++; |
| 434 | dev->stats.rx_length_errors++; |
| 435 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } else { |
| 437 | skb = dev_alloc_skb(len + 2); |
| 438 | if (skb == NULL) { |
| 439 | drops++; |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 440 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | skb_reserve(skb, 2); |
| 443 | skb_put(skb, len); |
David S. Miller | 8c7b7fa | 2007-07-10 22:08:12 -0700 | [diff] [blame] | 444 | skb_copy_to_linear_data(skb, (unsigned char *) this_qbuf, |
| 445 | len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | skb->protocol = eth_type_trans(skb, qep->dev); |
| 447 | netif_rx(skb); |
| 448 | qep->dev->last_rx = jiffies; |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 449 | dev->stats.rx_packets++; |
| 450 | dev->stats.rx_bytes += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | } |
| 453 | end_rxd->rx_addr = this_qbuf_dvma; |
| 454 | end_rxd->rx_flags = (RXD_OWN | ((RXD_PKT_SZ) & RXD_LENGTH)); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | elem = NEXT_RX(elem); |
| 457 | this = &rxbase[elem]; |
| 458 | } |
| 459 | qep->rx_new = elem; |
| 460 | if (drops) |
| 461 | printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", qep->dev->name); |
| 462 | } |
| 463 | |
| 464 | static void qe_tx_reclaim(struct sunqe *qep); |
| 465 | |
| 466 | /* Interrupts for all QE's get filtered out via the QEC master controller, |
| 467 | * so we just run through each qe and check to see who is signaling |
| 468 | * and thus needs to be serviced. |
| 469 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 470 | static irqreturn_t qec_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { |
Jeff Garzik | c31f28e | 2006-10-06 14:56:04 -0400 | [diff] [blame] | 472 | struct sunqec *qecp = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | u32 qec_status; |
| 474 | int channel = 0; |
| 475 | |
| 476 | /* Latch the status now. */ |
| 477 | qec_status = sbus_readl(qecp->gregs + GLOB_STAT); |
| 478 | while (channel < 4) { |
| 479 | if (qec_status & 0xf) { |
| 480 | struct sunqe *qep = qecp->qes[channel]; |
| 481 | u32 qe_status; |
| 482 | |
| 483 | qe_status = sbus_readl(qep->qcregs + CREG_STAT); |
| 484 | if (qe_status & CREG_STAT_ERRORS) { |
| 485 | if (qe_is_bolixed(qep, qe_status)) |
| 486 | goto next; |
| 487 | } |
| 488 | if (qe_status & CREG_STAT_RXIRQ) |
| 489 | qe_rx(qep); |
| 490 | if (netif_queue_stopped(qep->dev) && |
| 491 | (qe_status & CREG_STAT_TXIRQ)) { |
| 492 | spin_lock(&qep->lock); |
| 493 | qe_tx_reclaim(qep); |
| 494 | if (TX_BUFFS_AVAIL(qep) > 0) { |
| 495 | /* Wake net queue and return to |
| 496 | * lazy tx reclaim. |
| 497 | */ |
| 498 | netif_wake_queue(qep->dev); |
| 499 | sbus_writel(1, qep->qcregs + CREG_TIMASK); |
| 500 | } |
| 501 | spin_unlock(&qep->lock); |
| 502 | } |
| 503 | next: |
| 504 | ; |
| 505 | } |
| 506 | qec_status >>= 4; |
| 507 | channel++; |
| 508 | } |
| 509 | |
| 510 | return IRQ_HANDLED; |
| 511 | } |
| 512 | |
| 513 | static int qe_open(struct net_device *dev) |
| 514 | { |
| 515 | struct sunqe *qep = (struct sunqe *) dev->priv; |
| 516 | |
| 517 | qep->mconfig = (MREGS_MCONFIG_TXENAB | |
| 518 | MREGS_MCONFIG_RXENAB | |
| 519 | MREGS_MCONFIG_MBAENAB); |
| 520 | return qe_init(qep, 0); |
| 521 | } |
| 522 | |
| 523 | static int qe_close(struct net_device *dev) |
| 524 | { |
| 525 | struct sunqe *qep = (struct sunqe *) dev->priv; |
| 526 | |
| 527 | qe_stop(qep); |
| 528 | return 0; |
| 529 | } |
| 530 | |
| 531 | /* Reclaim TX'd frames from the ring. This must always run under |
| 532 | * the IRQ protected qep->lock. |
| 533 | */ |
| 534 | static void qe_tx_reclaim(struct sunqe *qep) |
| 535 | { |
| 536 | struct qe_txd *txbase = &qep->qe_block->qe_txd[0]; |
| 537 | int elem = qep->tx_old; |
| 538 | |
| 539 | while (elem != qep->tx_new) { |
| 540 | u32 flags = txbase[elem].tx_flags; |
| 541 | |
| 542 | if (flags & TXD_OWN) |
| 543 | break; |
| 544 | elem = NEXT_TX(elem); |
| 545 | } |
| 546 | qep->tx_old = elem; |
| 547 | } |
| 548 | |
| 549 | static void qe_tx_timeout(struct net_device *dev) |
| 550 | { |
| 551 | struct sunqe *qep = (struct sunqe *) dev->priv; |
| 552 | int tx_full; |
| 553 | |
| 554 | spin_lock_irq(&qep->lock); |
| 555 | |
| 556 | /* Try to reclaim, if that frees up some tx |
| 557 | * entries, we're fine. |
| 558 | */ |
| 559 | qe_tx_reclaim(qep); |
| 560 | tx_full = TX_BUFFS_AVAIL(qep) <= 0; |
| 561 | |
| 562 | spin_unlock_irq(&qep->lock); |
| 563 | |
| 564 | if (! tx_full) |
| 565 | goto out; |
| 566 | |
| 567 | printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name); |
| 568 | qe_init(qep, 1); |
| 569 | |
| 570 | out: |
| 571 | netif_wake_queue(dev); |
| 572 | } |
| 573 | |
| 574 | /* Get a packet queued to go onto the wire. */ |
| 575 | static int qe_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 576 | { |
| 577 | struct sunqe *qep = (struct sunqe *) dev->priv; |
| 578 | struct sunqe_buffers *qbufs = qep->buffers; |
| 579 | __u32 txbuf_dvma, qbufs_dvma = qep->buffers_dvma; |
| 580 | unsigned char *txbuf; |
| 581 | int len, entry; |
| 582 | |
| 583 | spin_lock_irq(&qep->lock); |
| 584 | |
| 585 | qe_tx_reclaim(qep); |
| 586 | |
| 587 | len = skb->len; |
| 588 | entry = qep->tx_new; |
| 589 | |
| 590 | txbuf = &qbufs->tx_buf[entry & (TX_RING_SIZE - 1)][0]; |
| 591 | txbuf_dvma = qbufs_dvma + |
| 592 | qebuf_offset(tx_buf, (entry & (TX_RING_SIZE - 1))); |
| 593 | |
| 594 | /* Avoid a race... */ |
| 595 | qep->qe_block->qe_txd[entry].tx_flags = TXD_UPDATE; |
| 596 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 597 | skb_copy_from_linear_data(skb, txbuf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | qep->qe_block->qe_txd[entry].tx_addr = txbuf_dvma; |
| 600 | qep->qe_block->qe_txd[entry].tx_flags = |
| 601 | (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH)); |
| 602 | qep->tx_new = NEXT_TX(entry); |
| 603 | |
| 604 | /* Get it going. */ |
| 605 | dev->trans_start = jiffies; |
| 606 | sbus_writel(CREG_CTRL_TWAKEUP, qep->qcregs + CREG_CTRL); |
| 607 | |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 608 | dev->stats.tx_packets++; |
| 609 | dev->stats.tx_bytes += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
| 611 | if (TX_BUFFS_AVAIL(qep) <= 0) { |
| 612 | /* Halt the net queue and enable tx interrupts. |
| 613 | * When the tx queue empties the tx irq handler |
| 614 | * will wake up the queue and return us back to |
| 615 | * the lazy tx reclaim scheme. |
| 616 | */ |
| 617 | netif_stop_queue(dev); |
| 618 | sbus_writel(0, qep->qcregs + CREG_TIMASK); |
| 619 | } |
| 620 | spin_unlock_irq(&qep->lock); |
| 621 | |
| 622 | dev_kfree_skb(skb); |
| 623 | |
| 624 | return 0; |
| 625 | } |
| 626 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | static void qe_set_multicast(struct net_device *dev) |
| 628 | { |
| 629 | struct sunqe *qep = (struct sunqe *) dev->priv; |
| 630 | struct dev_mc_list *dmi = dev->mc_list; |
| 631 | u8 new_mconfig = qep->mconfig; |
| 632 | char *addrs; |
| 633 | int i; |
| 634 | u32 crc; |
| 635 | |
| 636 | /* Lock out others. */ |
| 637 | netif_stop_queue(dev); |
| 638 | |
| 639 | if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) { |
| 640 | sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET, |
| 641 | qep->mregs + MREGS_IACONFIG); |
| 642 | while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) |
| 643 | barrier(); |
| 644 | for (i = 0; i < 8; i++) |
| 645 | sbus_writeb(0xff, qep->mregs + MREGS_FILTER); |
| 646 | sbus_writeb(0, qep->mregs + MREGS_IACONFIG); |
| 647 | } else if (dev->flags & IFF_PROMISC) { |
| 648 | new_mconfig |= MREGS_MCONFIG_PROMISC; |
| 649 | } else { |
| 650 | u16 hash_table[4]; |
| 651 | u8 *hbytes = (unsigned char *) &hash_table[0]; |
| 652 | |
| 653 | for (i = 0; i < 4; i++) |
| 654 | hash_table[i] = 0; |
| 655 | |
| 656 | for (i = 0; i < dev->mc_count; i++) { |
| 657 | addrs = dmi->dmi_addr; |
| 658 | dmi = dmi->next; |
| 659 | |
| 660 | if (!(*addrs & 1)) |
| 661 | continue; |
| 662 | crc = ether_crc_le(6, addrs); |
| 663 | crc >>= 26; |
| 664 | hash_table[crc >> 4] |= 1 << (crc & 0xf); |
| 665 | } |
| 666 | /* Program the qe with the new filter value. */ |
| 667 | sbus_writeb(MREGS_IACONFIG_ACHNGE | MREGS_IACONFIG_LARESET, |
| 668 | qep->mregs + MREGS_IACONFIG); |
| 669 | while ((sbus_readb(qep->mregs + MREGS_IACONFIG) & MREGS_IACONFIG_ACHNGE) != 0) |
| 670 | barrier(); |
| 671 | for (i = 0; i < 8; i++) { |
| 672 | u8 tmp = *hbytes++; |
| 673 | sbus_writeb(tmp, qep->mregs + MREGS_FILTER); |
| 674 | } |
| 675 | sbus_writeb(0, qep->mregs + MREGS_IACONFIG); |
| 676 | } |
| 677 | |
| 678 | /* Any change of the logical address filter, the physical address, |
| 679 | * or enabling/disabling promiscuous mode causes the MACE to disable |
| 680 | * the receiver. So we must re-enable them here or else the MACE |
| 681 | * refuses to listen to anything on the network. Sheesh, took |
| 682 | * me a day or two to find this bug. |
| 683 | */ |
| 684 | qep->mconfig = new_mconfig; |
| 685 | sbus_writeb(qep->mconfig, qep->mregs + MREGS_MCONFIG); |
| 686 | |
| 687 | /* Let us get going again. */ |
| 688 | netif_wake_queue(dev); |
| 689 | } |
| 690 | |
| 691 | /* Ethtool support... */ |
| 692 | static void qe_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) |
| 693 | { |
| 694 | struct sunqe *qep = dev->priv; |
| 695 | |
| 696 | strcpy(info->driver, "sunqe"); |
| 697 | strcpy(info->version, "3.0"); |
| 698 | sprintf(info->bus_info, "SBUS:%d", |
| 699 | qep->qe_sdev->slot); |
| 700 | } |
| 701 | |
| 702 | static u32 qe_get_link(struct net_device *dev) |
| 703 | { |
| 704 | struct sunqe *qep = dev->priv; |
| 705 | void __iomem *mregs = qep->mregs; |
| 706 | u8 phyconfig; |
| 707 | |
| 708 | spin_lock_irq(&qep->lock); |
| 709 | phyconfig = sbus_readb(mregs + MREGS_PHYCONFIG); |
| 710 | spin_unlock_irq(&qep->lock); |
| 711 | |
| 712 | return (phyconfig & MREGS_PHYCONFIG_LSTAT); |
| 713 | } |
| 714 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 715 | static const struct ethtool_ops qe_ethtool_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | .get_drvinfo = qe_get_drvinfo, |
| 717 | .get_link = qe_get_link, |
| 718 | }; |
| 719 | |
| 720 | /* This is only called once at boot time for each card probed. */ |
| 721 | static inline void qec_init_once(struct sunqec *qecp, struct sbus_dev *qsdev) |
| 722 | { |
| 723 | u8 bsizes = qecp->qec_bursts; |
| 724 | |
David S. Miller | 63237ee | 2008-08-26 23:33:42 -0700 | [diff] [blame] | 725 | if (sbus_can_burst64() && (bsizes & DMA_BURST64)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | sbus_writel(GLOB_CTRL_B64, qecp->gregs + GLOB_CTRL); |
| 727 | } else if (bsizes & DMA_BURST32) { |
| 728 | sbus_writel(GLOB_CTRL_B32, qecp->gregs + GLOB_CTRL); |
| 729 | } else { |
| 730 | sbus_writel(GLOB_CTRL_B16, qecp->gregs + GLOB_CTRL); |
| 731 | } |
| 732 | |
| 733 | /* Packetsize only used in 100baseT BigMAC configurations, |
| 734 | * set it to zero just to be on the safe side. |
| 735 | */ |
| 736 | sbus_writel(GLOB_PSIZE_2048, qecp->gregs + GLOB_PSIZE); |
| 737 | |
| 738 | /* Set the local memsize register, divided up to one piece per QE channel. */ |
| 739 | sbus_writel((qsdev->reg_addrs[1].reg_size >> 2), |
| 740 | qecp->gregs + GLOB_MSIZE); |
| 741 | |
| 742 | /* Divide up the local QEC memory amongst the 4 QE receiver and |
| 743 | * transmitter FIFOs. Basically it is (total / 2 / num_channels). |
| 744 | */ |
| 745 | sbus_writel((qsdev->reg_addrs[1].reg_size >> 2) >> 1, |
| 746 | qecp->gregs + GLOB_TSIZE); |
| 747 | sbus_writel((qsdev->reg_addrs[1].reg_size >> 2) >> 1, |
| 748 | qecp->gregs + GLOB_RSIZE); |
| 749 | } |
| 750 | |
Adrian Bunk | 3edd76c | 2008-01-30 22:03:39 +0200 | [diff] [blame] | 751 | static u8 __devinit qec_get_burst(struct device_node *dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | u8 bsizes, bsizes_more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 755 | /* Find and set the burst sizes for the QEC, since it |
| 756 | * does the actual dma for all 4 channels. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | */ |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 758 | bsizes = of_getintprop_default(dp, "burst-sizes", 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | bsizes &= 0xff; |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 760 | bsizes_more = of_getintprop_default(dp->parent, "burst-sizes", 0xff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
| 762 | if (bsizes_more != 0xff) |
| 763 | bsizes &= bsizes_more; |
| 764 | if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 || |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 765 | (bsizes & DMA_BURST32)==0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | bsizes = (DMA_BURST32 - 1); |
| 767 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 768 | return bsizes; |
| 769 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Adrian Bunk | 3edd76c | 2008-01-30 22:03:39 +0200 | [diff] [blame] | 771 | static struct sunqec * __devinit get_qec(struct sbus_dev *child_sdev) |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 772 | { |
| 773 | struct sbus_dev *qec_sdev = child_sdev->parent; |
| 774 | struct sunqec *qecp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 776 | for (qecp = root_qec_dev; qecp; qecp = qecp->next_module) { |
| 777 | if (qecp->qec_sdev == qec_sdev) |
| 778 | break; |
| 779 | } |
| 780 | if (!qecp) { |
| 781 | qecp = kzalloc(sizeof(struct sunqec), GFP_KERNEL); |
| 782 | if (qecp) { |
| 783 | u32 ctrl; |
| 784 | |
| 785 | qecp->qec_sdev = qec_sdev; |
| 786 | qecp->gregs = sbus_ioremap(&qec_sdev->resource[0], 0, |
| 787 | GLOB_REG_SIZE, |
| 788 | "QEC Global Registers"); |
| 789 | if (!qecp->gregs) |
| 790 | goto fail; |
| 791 | |
| 792 | /* Make sure the QEC is in MACE mode. */ |
| 793 | ctrl = sbus_readl(qecp->gregs + GLOB_CTRL); |
| 794 | ctrl &= 0xf0000000; |
| 795 | if (ctrl != GLOB_CTRL_MMODE) { |
| 796 | printk(KERN_ERR "qec: Not in MACE mode!\n"); |
| 797 | goto fail; |
| 798 | } |
| 799 | |
| 800 | if (qec_global_reset(qecp->gregs)) |
| 801 | goto fail; |
| 802 | |
| 803 | qecp->qec_bursts = qec_get_burst(qec_sdev->ofdev.node); |
| 804 | |
| 805 | qec_init_once(qecp, qec_sdev); |
| 806 | |
| 807 | if (request_irq(qec_sdev->irqs[0], &qec_interrupt, |
Thomas Gleixner | 1fb9df5 | 2006-07-01 19:29:39 -0700 | [diff] [blame] | 808 | IRQF_SHARED, "qec", (void *) qecp)) { |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 809 | printk(KERN_ERR "qec: Can't register irq.\n"); |
| 810 | goto fail; |
| 811 | } |
| 812 | |
| 813 | qecp->next_module = root_qec_dev; |
| 814 | root_qec_dev = qecp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | } |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 816 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 818 | return qecp; |
| 819 | |
| 820 | fail: |
| 821 | if (qecp->gregs) |
| 822 | sbus_iounmap(qecp->gregs, GLOB_REG_SIZE); |
| 823 | kfree(qecp); |
| 824 | return NULL; |
| 825 | } |
| 826 | |
Adrian Bunk | 3edd76c | 2008-01-30 22:03:39 +0200 | [diff] [blame] | 827 | static int __devinit qec_ether_init(struct sbus_dev *sdev) |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 828 | { |
| 829 | static unsigned version_printed; |
| 830 | struct net_device *dev; |
| 831 | struct sunqe *qe; |
| 832 | struct sunqec *qecp; |
| 833 | int i, res; |
| 834 | |
| 835 | if (version_printed++ == 0) |
| 836 | printk(KERN_INFO "%s", version); |
| 837 | |
| 838 | dev = alloc_etherdev(sizeof(struct sunqe)); |
| 839 | if (!dev) |
| 840 | return -ENOMEM; |
| 841 | |
Marcel van Nies | d0dc112 | 2007-04-21 15:31:58 -0700 | [diff] [blame] | 842 | memcpy(dev->dev_addr, idprom->id_ethaddr, 6); |
| 843 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 844 | qe = netdev_priv(dev); |
| 845 | |
| 846 | i = of_getintprop_default(sdev->ofdev.node, "channel#", -1); |
| 847 | if (i == -1) { |
| 848 | struct sbus_dev *td = sdev->parent->child; |
| 849 | i = 0; |
| 850 | while (td != sdev) { |
| 851 | td = td->next; |
| 852 | i++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 854 | } |
| 855 | qe->channel = i; |
| 856 | spin_lock_init(&qe->lock); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 857 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 858 | res = -ENODEV; |
| 859 | qecp = get_qec(sdev); |
| 860 | if (!qecp) |
| 861 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 863 | qecp->qes[qe->channel] = qe; |
| 864 | qe->dev = dev; |
| 865 | qe->parent = qecp; |
| 866 | qe->qe_sdev = sdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 868 | res = -ENOMEM; |
| 869 | qe->qcregs = sbus_ioremap(&qe->qe_sdev->resource[0], 0, |
| 870 | CREG_REG_SIZE, "QEC Channel Registers"); |
| 871 | if (!qe->qcregs) { |
| 872 | printk(KERN_ERR "qe: Cannot map channel registers.\n"); |
| 873 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | } |
| 875 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 876 | qe->mregs = sbus_ioremap(&qe->qe_sdev->resource[1], 0, |
| 877 | MREGS_REG_SIZE, "QE MACE Registers"); |
| 878 | if (!qe->mregs) { |
| 879 | printk(KERN_ERR "qe: Cannot map MACE registers.\n"); |
| 880 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | } |
| 882 | |
David S. Miller | 738f2b7 | 2008-08-27 18:09:11 -0700 | [diff] [blame] | 883 | qe->qe_block = dma_alloc_coherent(&qe->qe_sdev->ofdev.dev, |
| 884 | PAGE_SIZE, |
| 885 | &qe->qblock_dvma, GFP_ATOMIC); |
| 886 | qe->buffers = dma_alloc_coherent(&qe->qe_sdev->ofdev.dev, |
| 887 | sizeof(struct sunqe_buffers), |
| 888 | &qe->buffers_dvma, GFP_ATOMIC); |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 889 | if (qe->qe_block == NULL || qe->qblock_dvma == 0 || |
| 890 | qe->buffers == NULL || qe->buffers_dvma == 0) |
| 891 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 893 | /* Stop this QE. */ |
| 894 | qe_stop(qe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 896 | SET_NETDEV_DEV(dev, &sdev->ofdev.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 898 | dev->open = qe_open; |
| 899 | dev->stop = qe_close; |
| 900 | dev->hard_start_xmit = qe_start_xmit; |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 901 | dev->set_multicast_list = qe_set_multicast; |
| 902 | dev->tx_timeout = qe_tx_timeout; |
| 903 | dev->watchdog_timeo = 5*HZ; |
| 904 | dev->irq = sdev->irqs[0]; |
| 905 | dev->dma = 0; |
| 906 | dev->ethtool_ops = &qe_ethtool_ops; |
| 907 | |
| 908 | res = register_netdev(dev); |
| 909 | if (res) |
| 910 | goto fail; |
| 911 | |
| 912 | dev_set_drvdata(&sdev->ofdev.dev, qe); |
| 913 | |
| 914 | printk(KERN_INFO "%s: qe channel[%d] ", dev->name, qe->channel); |
| 915 | for (i = 0; i < 6; i++) |
| 916 | printk ("%2.2x%c", |
| 917 | dev->dev_addr[i], |
| 918 | i == 5 ? ' ': ':'); |
| 919 | printk("\n"); |
| 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | return 0; |
| 923 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 924 | fail: |
| 925 | if (qe->qcregs) |
| 926 | sbus_iounmap(qe->qcregs, CREG_REG_SIZE); |
| 927 | if (qe->mregs) |
| 928 | sbus_iounmap(qe->mregs, MREGS_REG_SIZE); |
| 929 | if (qe->qe_block) |
David S. Miller | 738f2b7 | 2008-08-27 18:09:11 -0700 | [diff] [blame] | 930 | dma_free_coherent(&qe->qe_sdev->ofdev.dev, |
| 931 | PAGE_SIZE, |
| 932 | qe->qe_block, |
| 933 | qe->qblock_dvma); |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 934 | if (qe->buffers) |
David S. Miller | 738f2b7 | 2008-08-27 18:09:11 -0700 | [diff] [blame] | 935 | dma_free_coherent(&qe->qe_sdev->ofdev.dev, |
| 936 | sizeof(struct sunqe_buffers), |
| 937 | qe->buffers, |
| 938 | qe->buffers_dvma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 940 | free_netdev(dev); |
| 941 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | return res; |
| 943 | } |
| 944 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 945 | static int __devinit qec_sbus_probe(struct of_device *dev, const struct of_device_id *match) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | { |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 947 | struct sbus_dev *sdev = to_sbus_device(&dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 949 | return qec_ether_init(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | } |
| 951 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 952 | static int __devexit qec_sbus_remove(struct of_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | { |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 954 | struct sunqe *qp = dev_get_drvdata(&dev->dev); |
| 955 | struct net_device *net_dev = qp->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
Marcel van Nies | d0dc112 | 2007-04-21 15:31:58 -0700 | [diff] [blame] | 957 | unregister_netdev(net_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 959 | sbus_iounmap(qp->qcregs, CREG_REG_SIZE); |
| 960 | sbus_iounmap(qp->mregs, MREGS_REG_SIZE); |
David S. Miller | 738f2b7 | 2008-08-27 18:09:11 -0700 | [diff] [blame] | 961 | dma_free_coherent(&qp->qe_sdev->ofdev.dev, |
| 962 | PAGE_SIZE, |
| 963 | qp->qe_block, |
| 964 | qp->qblock_dvma); |
| 965 | dma_free_coherent(&qp->qe_sdev->ofdev.dev, |
| 966 | sizeof(struct sunqe_buffers), |
| 967 | qp->buffers, |
| 968 | qp->buffers_dvma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 970 | free_netdev(net_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 972 | dev_set_drvdata(&dev->dev, NULL); |
| 973 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | return 0; |
| 975 | } |
| 976 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 977 | static struct of_device_id qec_sbus_match[] = { |
| 978 | { |
| 979 | .name = "qe", |
| 980 | }, |
| 981 | {}, |
| 982 | }; |
| 983 | |
| 984 | MODULE_DEVICE_TABLE(of, qec_sbus_match); |
| 985 | |
| 986 | static struct of_platform_driver qec_sbus_driver = { |
| 987 | .name = "qec", |
| 988 | .match_table = qec_sbus_match, |
| 989 | .probe = qec_sbus_probe, |
| 990 | .remove = __devexit_p(qec_sbus_remove), |
| 991 | }; |
| 992 | |
| 993 | static int __init qec_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | { |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 995 | return of_register_driver(&qec_sbus_driver, &sbus_bus_type); |
| 996 | } |
| 997 | |
| 998 | static void __exit qec_exit(void) |
| 999 | { |
| 1000 | of_unregister_driver(&qec_sbus_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | |
| 1002 | while (root_qec_dev) { |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 1003 | struct sunqec *next = root_qec_dev->next_module; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 1005 | free_irq(root_qec_dev->qec_sdev->irqs[0], |
| 1006 | (void *) root_qec_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | sbus_iounmap(root_qec_dev->gregs, GLOB_REG_SIZE); |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 1008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | kfree(root_qec_dev); |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 1010 | |
| 1011 | root_qec_dev = next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | } |
| 1013 | } |
| 1014 | |
David S. Miller | ecba38a | 2006-06-23 21:23:01 -0700 | [diff] [blame] | 1015 | module_init(qec_init); |
| 1016 | module_exit(qec_exit); |