1 /* 2 * drivers/net/ethernet/freescale/gianfar_ethtool.c 3 * 4 * Gianfar Ethernet Driver 5 * Ethtool support for Gianfar Enet 6 * Based on e1000 ethtool support 7 * 8 * Author: Andy Fleming 9 * Maintainer: Kumar Gala 10 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com> 11 * 12 * Copyright 2003-2006, 2008-2009, 2011 Freescale Semiconductor, Inc. 13 * 14 * This software may be used and distributed according to 15 * the terms of the GNU Public License, Version 2, incorporated herein 16 * by reference. 17 */ 18 19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 20 21 #include <linux/kernel.h> 22 #include <linux/string.h> 23 #include <linux/errno.h> 24 #include <linux/interrupt.h> 25 #include <linux/init.h> 26 #include <linux/delay.h> 27 #include <linux/netdevice.h> 28 #include <linux/etherdevice.h> 29 #include <linux/skbuff.h> 30 #include <linux/spinlock.h> 31 #include <linux/mm.h> 32 33 #include <asm/io.h> 34 #include <asm/irq.h> 35 #include <asm/uaccess.h> 36 #include <linux/module.h> 37 #include <linux/crc32.h> 38 #include <asm/types.h> 39 #include <linux/ethtool.h> 40 #include <linux/mii.h> 41 #include <linux/phy.h> 42 #include <linux/sort.h> 43 #include <linux/if_vlan.h> 44 45 #include "gianfar.h" 46 47 extern void gfar_start(struct net_device *dev); 48 extern int gfar_clean_rx_ring(struct gfar_priv_rx_q *rx_queue, int rx_work_limit); 49 50 #define GFAR_MAX_COAL_USECS 0xffff 51 #define GFAR_MAX_COAL_FRAMES 0xff 52 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, 53 u64 * buf); 54 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf); 55 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals); 56 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals); 57 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals); 58 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals); 59 static void gfar_gdrvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo); 60 61 static const char stat_gstrings[][ETH_GSTRING_LEN] = { 62 "rx-dropped-by-kernel", 63 "rx-large-frame-errors", 64 "rx-short-frame-errors", 65 "rx-non-octet-errors", 66 "rx-crc-errors", 67 "rx-overrun-errors", 68 "rx-busy-errors", 69 "rx-babbling-errors", 70 "rx-truncated-frames", 71 "ethernet-bus-error", 72 "tx-babbling-errors", 73 "tx-underrun-errors", 74 "rx-skb-missing-errors", 75 "tx-timeout-errors", 76 "tx-rx-64-frames", 77 "tx-rx-65-127-frames", 78 "tx-rx-128-255-frames", 79 "tx-rx-256-511-frames", 80 "tx-rx-512-1023-frames", 81 "tx-rx-1024-1518-frames", 82 "tx-rx-1519-1522-good-vlan", 83 "rx-bytes", 84 "rx-packets", 85 "rx-fcs-errors", 86 "receive-multicast-packet", 87 "receive-broadcast-packet", 88 "rx-control-frame-packets", 89 "rx-pause-frame-packets", 90 "rx-unknown-op-code", 91 "rx-alignment-error", 92 "rx-frame-length-error", 93 "rx-code-error", 94 "rx-carrier-sense-error", 95 "rx-undersize-packets", 96 "rx-oversize-packets", 97 "rx-fragmented-frames", 98 "rx-jabber-frames", 99 "rx-dropped-frames", 100 "tx-byte-counter", 101 "tx-packets", 102 "tx-multicast-packets", 103 "tx-broadcast-packets", 104 "tx-pause-control-frames", 105 "tx-deferral-packets", 106 "tx-excessive-deferral-packets", 107 "tx-single-collision-packets", 108 "tx-multiple-collision-packets", 109 "tx-late-collision-packets", 110 "tx-excessive-collision-packets", 111 "tx-total-collision", 112 "reserved", 113 "tx-dropped-frames", 114 "tx-jabber-frames", 115 "tx-fcs-errors", 116 "tx-control-frames", 117 "tx-oversize-frames", 118 "tx-undersize-frames", 119 "tx-fragmented-frames", 120 }; 121 122 /* Fill in a buffer with the strings which correspond to the 123 * stats */ 124 static void gfar_gstrings(struct net_device *dev, u32 stringset, u8 * buf) 125 { 126 struct gfar_private *priv = netdev_priv(dev); 127 128 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) 129 memcpy(buf, stat_gstrings, GFAR_STATS_LEN * ETH_GSTRING_LEN); 130 else 131 memcpy(buf, stat_gstrings, 132 GFAR_EXTRA_STATS_LEN * ETH_GSTRING_LEN); 133 } 134 135 /* Fill in an array of 64-bit statistics from various sources. 136 * This array will be appended to the end of the ethtool_stats 137 * structure, and returned to user space 138 */ 139 static void gfar_fill_stats(struct net_device *dev, struct ethtool_stats *dummy, u64 * buf) 140 { 141 int i; 142 struct gfar_private *priv = netdev_priv(dev); 143 struct gfar __iomem *regs = priv->gfargrp[0].regs; 144 u64 *extra = (u64 *) & priv->extra_stats; 145 146 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) { 147 u32 __iomem *rmon = (u32 __iomem *) ®s->rmon; 148 struct gfar_stats *stats = (struct gfar_stats *) buf; 149 150 for (i = 0; i < GFAR_RMON_LEN; i++) 151 stats->rmon[i] = (u64) gfar_read(&rmon[i]); 152 153 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) 154 stats->extra[i] = extra[i]; 155 } else 156 for (i = 0; i < GFAR_EXTRA_STATS_LEN; i++) 157 buf[i] = extra[i]; 158 } 159 160 static int gfar_sset_count(struct net_device *dev, int sset) 161 { 162 struct gfar_private *priv = netdev_priv(dev); 163 164 switch (sset) { 165 case ETH_SS_STATS: 166 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_RMON) 167 return GFAR_STATS_LEN; 168 else 169 return GFAR_EXTRA_STATS_LEN; 170 default: 171 return -EOPNOTSUPP; 172 } 173 } 174 175 /* Fills in the drvinfo structure with some basic info */ 176 static void gfar_gdrvinfo(struct net_device *dev, struct 177 ethtool_drvinfo *drvinfo) 178 { 179 strncpy(drvinfo->driver, DRV_NAME, GFAR_INFOSTR_LEN); 180 strncpy(drvinfo->version, gfar_driver_version, GFAR_INFOSTR_LEN); 181 strncpy(drvinfo->fw_version, "N/A", GFAR_INFOSTR_LEN); 182 strncpy(drvinfo->bus_info, "N/A", GFAR_INFOSTR_LEN); 183 drvinfo->regdump_len = 0; 184 drvinfo->eedump_len = 0; 185 } 186 187 188 static int gfar_ssettings(struct net_device *dev, struct ethtool_cmd *cmd) 189 { 190 struct gfar_private *priv = netdev_priv(dev); 191 struct phy_device *phydev = priv->phydev; 192 193 if (NULL == phydev) 194 return -ENODEV; 195 196 return phy_ethtool_sset(phydev, cmd); 197 } 198 199 200 /* Return the current settings in the ethtool_cmd structure */ 201 static int gfar_gsettings(struct net_device *dev, struct ethtool_cmd *cmd) 202 { 203 struct gfar_private *priv = netdev_priv(dev); 204 struct phy_device *phydev = priv->phydev; 205 struct gfar_priv_rx_q *rx_queue = NULL; 206 struct gfar_priv_tx_q *tx_queue = NULL; 207 208 if (NULL == phydev) 209 return -ENODEV; 210 tx_queue = priv->tx_queue[0]; 211 rx_queue = priv->rx_queue[0]; 212 213 /* etsec-1.7 and older versions have only one txic 214 * and rxic regs although they support multiple queues */ 215 cmd->maxtxpkt = get_icft_value(tx_queue->txic); 216 cmd->maxrxpkt = get_icft_value(rx_queue->rxic); 217 218 return phy_ethtool_gset(phydev, cmd); 219 } 220 221 /* Return the length of the register structure */ 222 static int gfar_reglen(struct net_device *dev) 223 { 224 return sizeof (struct gfar); 225 } 226 227 /* Return a dump of the GFAR register space */ 228 static void gfar_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *regbuf) 229 { 230 int i; 231 struct gfar_private *priv = netdev_priv(dev); 232 u32 __iomem *theregs = (u32 __iomem *) priv->gfargrp[0].regs; 233 u32 *buf = (u32 *) regbuf; 234 235 for (i = 0; i < sizeof (struct gfar) / sizeof (u32); i++) 236 buf[i] = gfar_read(&theregs[i]); 237 } 238 239 /* Convert microseconds to ethernet clock ticks, which changes 240 * depending on what speed the controller is running at */ 241 static unsigned int gfar_usecs2ticks(struct gfar_private *priv, unsigned int usecs) 242 { 243 unsigned int count; 244 245 /* The timer is different, depending on the interface speed */ 246 switch (priv->phydev->speed) { 247 case SPEED_1000: 248 count = GFAR_GBIT_TIME; 249 break; 250 case SPEED_100: 251 count = GFAR_100_TIME; 252 break; 253 case SPEED_10: 254 default: 255 count = GFAR_10_TIME; 256 break; 257 } 258 259 /* Make sure we return a number greater than 0 260 * if usecs > 0 */ 261 return (usecs * 1000 + count - 1) / count; 262 } 263 264 /* Convert ethernet clock ticks to microseconds */ 265 static unsigned int gfar_ticks2usecs(struct gfar_private *priv, unsigned int ticks) 266 { 267 unsigned int count; 268 269 /* The timer is different, depending on the interface speed */ 270 switch (priv->phydev->speed) { 271 case SPEED_1000: 272 count = GFAR_GBIT_TIME; 273 break; 274 case SPEED_100: 275 count = GFAR_100_TIME; 276 break; 277 case SPEED_10: 278 default: 279 count = GFAR_10_TIME; 280 break; 281 } 282 283 /* Make sure we return a number greater than 0 */ 284 /* if ticks is > 0 */ 285 return (ticks * count) / 1000; 286 } 287 288 /* Get the coalescing parameters, and put them in the cvals 289 * structure. */ 290 static int gfar_gcoalesce(struct net_device *dev, struct ethtool_coalesce *cvals) 291 { 292 struct gfar_private *priv = netdev_priv(dev); 293 struct gfar_priv_rx_q *rx_queue = NULL; 294 struct gfar_priv_tx_q *tx_queue = NULL; 295 unsigned long rxtime; 296 unsigned long rxcount; 297 unsigned long txtime; 298 unsigned long txcount; 299 300 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE)) 301 return -EOPNOTSUPP; 302 303 if (NULL == priv->phydev) 304 return -ENODEV; 305 306 rx_queue = priv->rx_queue[0]; 307 tx_queue = priv->tx_queue[0]; 308 309 rxtime = get_ictt_value(rx_queue->rxic); 310 rxcount = get_icft_value(rx_queue->rxic); 311 txtime = get_ictt_value(tx_queue->txic); 312 txcount = get_icft_value(tx_queue->txic); 313 cvals->rx_coalesce_usecs = gfar_ticks2usecs(priv, rxtime); 314 cvals->rx_max_coalesced_frames = rxcount; 315 316 cvals->tx_coalesce_usecs = gfar_ticks2usecs(priv, txtime); 317 cvals->tx_max_coalesced_frames = txcount; 318 319 cvals->use_adaptive_rx_coalesce = 0; 320 cvals->use_adaptive_tx_coalesce = 0; 321 322 cvals->pkt_rate_low = 0; 323 cvals->rx_coalesce_usecs_low = 0; 324 cvals->rx_max_coalesced_frames_low = 0; 325 cvals->tx_coalesce_usecs_low = 0; 326 cvals->tx_max_coalesced_frames_low = 0; 327 328 /* When the packet rate is below pkt_rate_high but above 329 * pkt_rate_low (both measured in packets per second) the 330 * normal {rx,tx}_* coalescing parameters are used. 331 */ 332 333 /* When the packet rate is (measured in packets per second) 334 * is above pkt_rate_high, the {rx,tx}_*_high parameters are 335 * used. 336 */ 337 cvals->pkt_rate_high = 0; 338 cvals->rx_coalesce_usecs_high = 0; 339 cvals->rx_max_coalesced_frames_high = 0; 340 cvals->tx_coalesce_usecs_high = 0; 341 cvals->tx_max_coalesced_frames_high = 0; 342 343 /* How often to do adaptive coalescing packet rate sampling, 344 * measured in seconds. Must not be zero. 345 */ 346 cvals->rate_sample_interval = 0; 347 348 return 0; 349 } 350 351 /* Change the coalescing values. 352 * Both cvals->*_usecs and cvals->*_frames have to be > 0 353 * in order for coalescing to be active 354 */ 355 static int gfar_scoalesce(struct net_device *dev, struct ethtool_coalesce *cvals) 356 { 357 struct gfar_private *priv = netdev_priv(dev); 358 int i = 0; 359 360 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_COALESCE)) 361 return -EOPNOTSUPP; 362 363 /* Set up rx coalescing */ 364 /* As of now, we will enable/disable coalescing for all 365 * queues together in case of eTSEC2, this will be modified 366 * along with the ethtool interface */ 367 if ((cvals->rx_coalesce_usecs == 0) || 368 (cvals->rx_max_coalesced_frames == 0)) { 369 for (i = 0; i < priv->num_rx_queues; i++) 370 priv->rx_queue[i]->rxcoalescing = 0; 371 } else { 372 for (i = 0; i < priv->num_rx_queues; i++) 373 priv->rx_queue[i]->rxcoalescing = 1; 374 } 375 376 if (NULL == priv->phydev) 377 return -ENODEV; 378 379 /* Check the bounds of the values */ 380 if (cvals->rx_coalesce_usecs > GFAR_MAX_COAL_USECS) { 381 pr_info("Coalescing is limited to %d microseconds\n", 382 GFAR_MAX_COAL_USECS); 383 return -EINVAL; 384 } 385 386 if (cvals->rx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) { 387 pr_info("Coalescing is limited to %d frames\n", 388 GFAR_MAX_COAL_FRAMES); 389 return -EINVAL; 390 } 391 392 for (i = 0; i < priv->num_rx_queues; i++) { 393 priv->rx_queue[i]->rxic = mk_ic_value( 394 cvals->rx_max_coalesced_frames, 395 gfar_usecs2ticks(priv, cvals->rx_coalesce_usecs)); 396 } 397 398 /* Set up tx coalescing */ 399 if ((cvals->tx_coalesce_usecs == 0) || 400 (cvals->tx_max_coalesced_frames == 0)) { 401 for (i = 0; i < priv->num_tx_queues; i++) 402 priv->tx_queue[i]->txcoalescing = 0; 403 } else { 404 for (i = 0; i < priv->num_tx_queues; i++) 405 priv->tx_queue[i]->txcoalescing = 1; 406 } 407 408 /* Check the bounds of the values */ 409 if (cvals->tx_coalesce_usecs > GFAR_MAX_COAL_USECS) { 410 pr_info("Coalescing is limited to %d microseconds\n", 411 GFAR_MAX_COAL_USECS); 412 return -EINVAL; 413 } 414 415 if (cvals->tx_max_coalesced_frames > GFAR_MAX_COAL_FRAMES) { 416 pr_info("Coalescing is limited to %d frames\n", 417 GFAR_MAX_COAL_FRAMES); 418 return -EINVAL; 419 } 420 421 for (i = 0; i < priv->num_tx_queues; i++) { 422 priv->tx_queue[i]->txic = mk_ic_value( 423 cvals->tx_max_coalesced_frames, 424 gfar_usecs2ticks(priv, cvals->tx_coalesce_usecs)); 425 } 426 427 gfar_configure_coalescing(priv, 0xFF, 0xFF); 428 429 return 0; 430 } 431 432 /* Fills in rvals with the current ring parameters. Currently, 433 * rx, rx_mini, and rx_jumbo rings are the same size, as mini and 434 * jumbo are ignored by the driver */ 435 static void gfar_gringparam(struct net_device *dev, struct ethtool_ringparam *rvals) 436 { 437 struct gfar_private *priv = netdev_priv(dev); 438 struct gfar_priv_tx_q *tx_queue = NULL; 439 struct gfar_priv_rx_q *rx_queue = NULL; 440 441 tx_queue = priv->tx_queue[0]; 442 rx_queue = priv->rx_queue[0]; 443 444 rvals->rx_max_pending = GFAR_RX_MAX_RING_SIZE; 445 rvals->rx_mini_max_pending = GFAR_RX_MAX_RING_SIZE; 446 rvals->rx_jumbo_max_pending = GFAR_RX_MAX_RING_SIZE; 447 rvals->tx_max_pending = GFAR_TX_MAX_RING_SIZE; 448 449 /* Values changeable by the user. The valid values are 450 * in the range 1 to the "*_max_pending" counterpart above. 451 */ 452 rvals->rx_pending = rx_queue->rx_ring_size; 453 rvals->rx_mini_pending = rx_queue->rx_ring_size; 454 rvals->rx_jumbo_pending = rx_queue->rx_ring_size; 455 rvals->tx_pending = tx_queue->tx_ring_size; 456 } 457 458 /* Change the current ring parameters, stopping the controller if 459 * necessary so that we don't mess things up while we're in 460 * motion. We wait for the ring to be clean before reallocating 461 * the rings. */ 462 static int gfar_sringparam(struct net_device *dev, struct ethtool_ringparam *rvals) 463 { 464 struct gfar_private *priv = netdev_priv(dev); 465 int err = 0, i = 0; 466 467 if (rvals->rx_pending > GFAR_RX_MAX_RING_SIZE) 468 return -EINVAL; 469 470 if (!is_power_of_2(rvals->rx_pending)) { 471 netdev_err(dev, "Ring sizes must be a power of 2\n"); 472 return -EINVAL; 473 } 474 475 if (rvals->tx_pending > GFAR_TX_MAX_RING_SIZE) 476 return -EINVAL; 477 478 if (!is_power_of_2(rvals->tx_pending)) { 479 netdev_err(dev, "Ring sizes must be a power of 2\n"); 480 return -EINVAL; 481 } 482 483 484 if (dev->flags & IFF_UP) { 485 unsigned long flags; 486 487 /* Halt TX and RX, and process the frames which 488 * have already been received */ 489 local_irq_save(flags); 490 lock_tx_qs(priv); 491 lock_rx_qs(priv); 492 493 gfar_halt(dev); 494 495 unlock_rx_qs(priv); 496 unlock_tx_qs(priv); 497 local_irq_restore(flags); 498 499 for (i = 0; i < priv->num_rx_queues; i++) 500 gfar_clean_rx_ring(priv->rx_queue[i], 501 priv->rx_queue[i]->rx_ring_size); 502 503 /* Now we take down the rings to rebuild them */ 504 stop_gfar(dev); 505 } 506 507 /* Change the size */ 508 for (i = 0; i < priv->num_rx_queues; i++) { 509 priv->rx_queue[i]->rx_ring_size = rvals->rx_pending; 510 priv->tx_queue[i]->tx_ring_size = rvals->tx_pending; 511 priv->tx_queue[i]->num_txbdfree = priv->tx_queue[i]->tx_ring_size; 512 } 513 514 /* Rebuild the rings with the new size */ 515 if (dev->flags & IFF_UP) { 516 err = startup_gfar(dev); 517 netif_tx_wake_all_queues(dev); 518 } 519 return err; 520 } 521 522 int gfar_set_features(struct net_device *dev, netdev_features_t features) 523 { 524 struct gfar_private *priv = netdev_priv(dev); 525 unsigned long flags; 526 int err = 0, i = 0; 527 netdev_features_t changed = dev->features ^ features; 528 529 if (changed & (NETIF_F_HW_VLAN_TX|NETIF_F_HW_VLAN_RX)) 530 gfar_vlan_mode(dev, features); 531 532 if (!(changed & NETIF_F_RXCSUM)) 533 return 0; 534 535 if (dev->flags & IFF_UP) { 536 /* Halt TX and RX, and process the frames which 537 * have already been received */ 538 local_irq_save(flags); 539 lock_tx_qs(priv); 540 lock_rx_qs(priv); 541 542 gfar_halt(dev); 543 544 unlock_tx_qs(priv); 545 unlock_rx_qs(priv); 546 local_irq_restore(flags); 547 548 for (i = 0; i < priv->num_rx_queues; i++) 549 gfar_clean_rx_ring(priv->rx_queue[i], 550 priv->rx_queue[i]->rx_ring_size); 551 552 /* Now we take down the rings to rebuild them */ 553 stop_gfar(dev); 554 555 dev->features = features; 556 557 err = startup_gfar(dev); 558 netif_tx_wake_all_queues(dev); 559 } 560 return err; 561 } 562 563 static uint32_t gfar_get_msglevel(struct net_device *dev) 564 { 565 struct gfar_private *priv = netdev_priv(dev); 566 return priv->msg_enable; 567 } 568 569 static void gfar_set_msglevel(struct net_device *dev, uint32_t data) 570 { 571 struct gfar_private *priv = netdev_priv(dev); 572 priv->msg_enable = data; 573 } 574 575 #ifdef CONFIG_PM 576 static void gfar_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 577 { 578 struct gfar_private *priv = netdev_priv(dev); 579 580 if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) { 581 wol->supported = WAKE_MAGIC; 582 wol->wolopts = priv->wol_en ? WAKE_MAGIC : 0; 583 } else { 584 wol->supported = wol->wolopts = 0; 585 } 586 } 587 588 static int gfar_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) 589 { 590 struct gfar_private *priv = netdev_priv(dev); 591 unsigned long flags; 592 593 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET) && 594 wol->wolopts != 0) 595 return -EINVAL; 596 597 if (wol->wolopts & ~WAKE_MAGIC) 598 return -EINVAL; 599 600 device_set_wakeup_enable(&dev->dev, wol->wolopts & WAKE_MAGIC); 601 602 spin_lock_irqsave(&priv->bflock, flags); 603 priv->wol_en = !!device_may_wakeup(&dev->dev); 604 spin_unlock_irqrestore(&priv->bflock, flags); 605 606 return 0; 607 } 608 #endif 609 610 static void ethflow_to_filer_rules (struct gfar_private *priv, u64 ethflow) 611 { 612 u32 fcr = 0x0, fpr = FPR_FILER_MASK; 613 614 if (ethflow & RXH_L2DA) { 615 fcr = RQFCR_PID_DAH |RQFCR_CMP_NOMATCH | 616 RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0; 617 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 618 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 619 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 620 priv->cur_filer_idx = priv->cur_filer_idx - 1; 621 622 fcr = RQFCR_PID_DAL | RQFCR_AND | RQFCR_CMP_NOMATCH | 623 RQFCR_HASH | RQFCR_AND | RQFCR_HASHTBL_0; 624 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 625 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 626 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 627 priv->cur_filer_idx = priv->cur_filer_idx - 1; 628 } 629 630 if (ethflow & RXH_VLAN) { 631 fcr = RQFCR_PID_VID | RQFCR_CMP_NOMATCH | RQFCR_HASH | 632 RQFCR_AND | RQFCR_HASHTBL_0; 633 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 634 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 635 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 636 priv->cur_filer_idx = priv->cur_filer_idx - 1; 637 } 638 639 if (ethflow & RXH_IP_SRC) { 640 fcr = RQFCR_PID_SIA | RQFCR_CMP_NOMATCH | RQFCR_HASH | 641 RQFCR_AND | RQFCR_HASHTBL_0; 642 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 643 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 644 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 645 priv->cur_filer_idx = priv->cur_filer_idx - 1; 646 } 647 648 if (ethflow & (RXH_IP_DST)) { 649 fcr = RQFCR_PID_DIA | RQFCR_CMP_NOMATCH | RQFCR_HASH | 650 RQFCR_AND | RQFCR_HASHTBL_0; 651 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 652 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 653 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 654 priv->cur_filer_idx = priv->cur_filer_idx - 1; 655 } 656 657 if (ethflow & RXH_L3_PROTO) { 658 fcr = RQFCR_PID_L4P | RQFCR_CMP_NOMATCH | RQFCR_HASH | 659 RQFCR_AND | RQFCR_HASHTBL_0; 660 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 661 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 662 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 663 priv->cur_filer_idx = priv->cur_filer_idx - 1; 664 } 665 666 if (ethflow & RXH_L4_B_0_1) { 667 fcr = RQFCR_PID_SPT | RQFCR_CMP_NOMATCH | RQFCR_HASH | 668 RQFCR_AND | RQFCR_HASHTBL_0; 669 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 670 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 671 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 672 priv->cur_filer_idx = priv->cur_filer_idx - 1; 673 } 674 675 if (ethflow & RXH_L4_B_2_3) { 676 fcr = RQFCR_PID_DPT | RQFCR_CMP_NOMATCH | RQFCR_HASH | 677 RQFCR_AND | RQFCR_HASHTBL_0; 678 priv->ftp_rqfpr[priv->cur_filer_idx] = fpr; 679 priv->ftp_rqfcr[priv->cur_filer_idx] = fcr; 680 gfar_write_filer(priv, priv->cur_filer_idx, fcr, fpr); 681 priv->cur_filer_idx = priv->cur_filer_idx - 1; 682 } 683 } 684 685 static int gfar_ethflow_to_filer_table(struct gfar_private *priv, u64 ethflow, u64 class) 686 { 687 unsigned int last_rule_idx = priv->cur_filer_idx; 688 unsigned int cmp_rqfpr; 689 unsigned int *local_rqfpr; 690 unsigned int *local_rqfcr; 691 int i = 0x0, k = 0x0; 692 int j = MAX_FILER_IDX, l = 0x0; 693 int ret = 1; 694 695 local_rqfpr = kmalloc(sizeof(unsigned int) * (MAX_FILER_IDX + 1), 696 GFP_KERNEL); 697 local_rqfcr = kmalloc(sizeof(unsigned int) * (MAX_FILER_IDX + 1), 698 GFP_KERNEL); 699 if (!local_rqfpr || !local_rqfcr) { 700 pr_err("Out of memory\n"); 701 ret = 0; 702 goto err; 703 } 704 705 switch (class) { 706 case TCP_V4_FLOW: 707 cmp_rqfpr = RQFPR_IPV4 |RQFPR_TCP; 708 break; 709 case UDP_V4_FLOW: 710 cmp_rqfpr = RQFPR_IPV4 |RQFPR_UDP; 711 break; 712 case TCP_V6_FLOW: 713 cmp_rqfpr = RQFPR_IPV6 |RQFPR_TCP; 714 break; 715 case UDP_V6_FLOW: 716 cmp_rqfpr = RQFPR_IPV6 |RQFPR_UDP; 717 break; 718 default: 719 pr_err("Right now this class is not supported\n"); 720 ret = 0; 721 goto err; 722 } 723 724 for (i = 0; i < MAX_FILER_IDX + 1; i++) { 725 local_rqfpr[j] = priv->ftp_rqfpr[i]; 726 local_rqfcr[j] = priv->ftp_rqfcr[i]; 727 j--; 728 if ((priv->ftp_rqfcr[i] == (RQFCR_PID_PARSE | 729 RQFCR_CLE |RQFCR_AND)) && 730 (priv->ftp_rqfpr[i] == cmp_rqfpr)) 731 break; 732 } 733 734 if (i == MAX_FILER_IDX + 1) { 735 pr_err("No parse rule found, can't create hash rules\n"); 736 ret = 0; 737 goto err; 738 } 739 740 /* If a match was found, then it begins the starting of a cluster rule 741 * if it was already programmed, we need to overwrite these rules 742 */ 743 for (l = i+1; l < MAX_FILER_IDX; l++) { 744 if ((priv->ftp_rqfcr[l] & RQFCR_CLE) && 745 !(priv->ftp_rqfcr[l] & RQFCR_AND)) { 746 priv->ftp_rqfcr[l] = RQFCR_CLE | RQFCR_CMP_EXACT | 747 RQFCR_HASHTBL_0 | RQFCR_PID_MASK; 748 priv->ftp_rqfpr[l] = FPR_FILER_MASK; 749 gfar_write_filer(priv, l, priv->ftp_rqfcr[l], 750 priv->ftp_rqfpr[l]); 751 break; 752 } 753 754 if (!(priv->ftp_rqfcr[l] & RQFCR_CLE) && 755 (priv->ftp_rqfcr[l] & RQFCR_AND)) 756 continue; 757 else { 758 local_rqfpr[j] = priv->ftp_rqfpr[l]; 759 local_rqfcr[j] = priv->ftp_rqfcr[l]; 760 j--; 761 } 762 } 763 764 priv->cur_filer_idx = l - 1; 765 last_rule_idx = l; 766 767 /* hash rules */ 768 ethflow_to_filer_rules(priv, ethflow); 769 770 /* Write back the popped out rules again */ 771 for (k = j+1; k < MAX_FILER_IDX; k++) { 772 priv->ftp_rqfpr[priv->cur_filer_idx] = local_rqfpr[k]; 773 priv->ftp_rqfcr[priv->cur_filer_idx] = local_rqfcr[k]; 774 gfar_write_filer(priv, priv->cur_filer_idx, 775 local_rqfcr[k], local_rqfpr[k]); 776 if (!priv->cur_filer_idx) 777 break; 778 priv->cur_filer_idx = priv->cur_filer_idx - 1; 779 } 780 781 err: 782 kfree(local_rqfcr); 783 kfree(local_rqfpr); 784 return ret; 785 } 786 787 static int gfar_set_hash_opts(struct gfar_private *priv, struct ethtool_rxnfc *cmd) 788 { 789 /* write the filer rules here */ 790 if (!gfar_ethflow_to_filer_table(priv, cmd->data, cmd->flow_type)) 791 return -EINVAL; 792 793 return 0; 794 } 795 796 static int gfar_check_filer_hardware(struct gfar_private *priv) 797 { 798 struct gfar __iomem *regs = NULL; 799 u32 i; 800 801 regs = priv->gfargrp[0].regs; 802 803 /* Check if we are in FIFO mode */ 804 i = gfar_read(®s->ecntrl); 805 i &= ECNTRL_FIFM; 806 if (i == ECNTRL_FIFM) { 807 netdev_notice(priv->ndev, "Interface in FIFO mode\n"); 808 i = gfar_read(®s->rctrl); 809 i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM; 810 if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) { 811 netdev_info(priv->ndev, 812 "Receive Queue Filtering enabled\n"); 813 } else { 814 netdev_warn(priv->ndev, 815 "Receive Queue Filtering disabled\n"); 816 return -EOPNOTSUPP; 817 } 818 } 819 /* Or in standard mode */ 820 else { 821 i = gfar_read(®s->rctrl); 822 i &= RCTRL_PRSDEP_MASK; 823 if (i == RCTRL_PRSDEP_MASK) { 824 netdev_info(priv->ndev, 825 "Receive Queue Filtering enabled\n"); 826 } else { 827 netdev_warn(priv->ndev, 828 "Receive Queue Filtering disabled\n"); 829 return -EOPNOTSUPP; 830 } 831 } 832 833 /* Sets the properties for arbitrary filer rule 834 * to the first 4 Layer 4 Bytes */ 835 regs->rbifx = 0xC0C1C2C3; 836 return 0; 837 } 838 839 static int gfar_comp_asc(const void *a, const void *b) 840 { 841 return memcmp(a, b, 4); 842 } 843 844 static int gfar_comp_desc(const void *a, const void *b) 845 { 846 return -memcmp(a, b, 4); 847 } 848 849 static void gfar_swap(void *a, void *b, int size) 850 { 851 u32 *_a = a; 852 u32 *_b = b; 853 854 swap(_a[0], _b[0]); 855 swap(_a[1], _b[1]); 856 swap(_a[2], _b[2]); 857 swap(_a[3], _b[3]); 858 } 859 860 /* Write a mask to filer cache */ 861 static void gfar_set_mask(u32 mask, struct filer_table *tab) 862 { 863 tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT; 864 tab->fe[tab->index].prop = mask; 865 tab->index++; 866 } 867 868 /* Sets parse bits (e.g. IP or TCP) */ 869 static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab) 870 { 871 gfar_set_mask(mask, tab); 872 tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE 873 | RQFCR_AND; 874 tab->fe[tab->index].prop = value; 875 tab->index++; 876 } 877 878 static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag, 879 struct filer_table *tab) 880 { 881 gfar_set_mask(mask, tab); 882 tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag; 883 tab->fe[tab->index].prop = value; 884 tab->index++; 885 } 886 887 /* 888 * For setting a tuple of value and mask of type flag 889 * Example: 890 * IP-Src = 10.0.0.0/255.0.0.0 891 * value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4 892 * 893 * Ethtool gives us a value=0 and mask=~0 for don't care a tuple 894 * For a don't care mask it gives us a 0 895 * 896 * The check if don't care and the mask adjustment if mask=0 is done for VLAN 897 * and MAC stuff on an upper level (due to missing information on this level). 898 * For these guys we can discard them if they are value=0 and mask=0. 899 * 900 * Further the all masks are one-padded for better hardware efficiency. 901 */ 902 static void gfar_set_attribute(u32 value, u32 mask, u32 flag, 903 struct filer_table *tab) 904 { 905 switch (flag) { 906 /* 3bit */ 907 case RQFCR_PID_PRI: 908 if (!(value | mask)) 909 return; 910 mask |= RQFCR_PID_PRI_MASK; 911 break; 912 /* 8bit */ 913 case RQFCR_PID_L4P: 914 case RQFCR_PID_TOS: 915 if (!~(mask | RQFCR_PID_L4P_MASK)) 916 return; 917 if (!mask) 918 mask = ~0; 919 else 920 mask |= RQFCR_PID_L4P_MASK; 921 break; 922 /* 12bit */ 923 case RQFCR_PID_VID: 924 if (!(value | mask)) 925 return; 926 mask |= RQFCR_PID_VID_MASK; 927 break; 928 /* 16bit */ 929 case RQFCR_PID_DPT: 930 case RQFCR_PID_SPT: 931 case RQFCR_PID_ETY: 932 if (!~(mask | RQFCR_PID_PORT_MASK)) 933 return; 934 if (!mask) 935 mask = ~0; 936 else 937 mask |= RQFCR_PID_PORT_MASK; 938 break; 939 /* 24bit */ 940 case RQFCR_PID_DAH: 941 case RQFCR_PID_DAL: 942 case RQFCR_PID_SAH: 943 case RQFCR_PID_SAL: 944 if (!(value | mask)) 945 return; 946 mask |= RQFCR_PID_MAC_MASK; 947 break; 948 /* for all real 32bit masks */ 949 default: 950 if (!~mask) 951 return; 952 if (!mask) 953 mask = ~0; 954 break; 955 } 956 gfar_set_general_attribute(value, mask, flag, tab); 957 } 958 959 /* Translates value and mask for UDP, TCP or SCTP */ 960 static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value, 961 struct ethtool_tcpip4_spec *mask, struct filer_table *tab) 962 { 963 gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab); 964 gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab); 965 gfar_set_attribute(value->pdst, mask->pdst, RQFCR_PID_DPT, tab); 966 gfar_set_attribute(value->psrc, mask->psrc, RQFCR_PID_SPT, tab); 967 gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab); 968 } 969 970 /* Translates value and mask for RAW-IP4 */ 971 static void gfar_set_user_ip(struct ethtool_usrip4_spec *value, 972 struct ethtool_usrip4_spec *mask, struct filer_table *tab) 973 { 974 gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab); 975 gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab); 976 gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab); 977 gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab); 978 gfar_set_attribute(value->l4_4_bytes, mask->l4_4_bytes, RQFCR_PID_ARB, 979 tab); 980 981 } 982 983 /* Translates value and mask for ETHER spec */ 984 static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask, 985 struct filer_table *tab) 986 { 987 u32 upper_temp_mask = 0; 988 u32 lower_temp_mask = 0; 989 /* Source address */ 990 if (!is_broadcast_ether_addr(mask->h_source)) { 991 992 if (is_zero_ether_addr(mask->h_source)) { 993 upper_temp_mask = 0xFFFFFFFF; 994 lower_temp_mask = 0xFFFFFFFF; 995 } else { 996 upper_temp_mask = mask->h_source[0] << 16 997 | mask->h_source[1] << 8 998 | mask->h_source[2]; 999 lower_temp_mask = mask->h_source[3] << 16 1000 | mask->h_source[4] << 8 1001 | mask->h_source[5]; 1002 } 1003 /* Upper 24bit */ 1004 gfar_set_attribute( 1005 value->h_source[0] << 16 | value->h_source[1] 1006 << 8 | value->h_source[2], 1007 upper_temp_mask, RQFCR_PID_SAH, tab); 1008 /* And the same for the lower part */ 1009 gfar_set_attribute( 1010 value->h_source[3] << 16 | value->h_source[4] 1011 << 8 | value->h_source[5], 1012 lower_temp_mask, RQFCR_PID_SAL, tab); 1013 } 1014 /* Destination address */ 1015 if (!is_broadcast_ether_addr(mask->h_dest)) { 1016 1017 /* Special for destination is limited broadcast */ 1018 if ((is_broadcast_ether_addr(value->h_dest) 1019 && is_zero_ether_addr(mask->h_dest))) { 1020 gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab); 1021 } else { 1022 1023 if (is_zero_ether_addr(mask->h_dest)) { 1024 upper_temp_mask = 0xFFFFFFFF; 1025 lower_temp_mask = 0xFFFFFFFF; 1026 } else { 1027 upper_temp_mask = mask->h_dest[0] << 16 1028 | mask->h_dest[1] << 8 1029 | mask->h_dest[2]; 1030 lower_temp_mask = mask->h_dest[3] << 16 1031 | mask->h_dest[4] << 8 1032 | mask->h_dest[5]; 1033 } 1034 1035 /* Upper 24bit */ 1036 gfar_set_attribute( 1037 value->h_dest[0] << 16 1038 | value->h_dest[1] << 8 1039 | value->h_dest[2], 1040 upper_temp_mask, RQFCR_PID_DAH, tab); 1041 /* And the same for the lower part */ 1042 gfar_set_attribute( 1043 value->h_dest[3] << 16 1044 | value->h_dest[4] << 8 1045 | value->h_dest[5], 1046 lower_temp_mask, RQFCR_PID_DAL, tab); 1047 } 1048 } 1049 1050 gfar_set_attribute(value->h_proto, mask->h_proto, RQFCR_PID_ETY, tab); 1051 1052 } 1053 1054 /* Convert a rule to binary filter format of gianfar */ 1055 static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule, 1056 struct filer_table *tab) 1057 { 1058 u32 vlan = 0, vlan_mask = 0; 1059 u32 id = 0, id_mask = 0; 1060 u32 cfi = 0, cfi_mask = 0; 1061 u32 prio = 0, prio_mask = 0; 1062 1063 u32 old_index = tab->index; 1064 1065 /* Check if vlan is wanted */ 1066 if ((rule->flow_type & FLOW_EXT) && (rule->m_ext.vlan_tci != 0xFFFF)) { 1067 if (!rule->m_ext.vlan_tci) 1068 rule->m_ext.vlan_tci = 0xFFFF; 1069 1070 vlan = RQFPR_VLN; 1071 vlan_mask = RQFPR_VLN; 1072 1073 /* Separate the fields */ 1074 id = rule->h_ext.vlan_tci & VLAN_VID_MASK; 1075 id_mask = rule->m_ext.vlan_tci & VLAN_VID_MASK; 1076 cfi = rule->h_ext.vlan_tci & VLAN_CFI_MASK; 1077 cfi_mask = rule->m_ext.vlan_tci & VLAN_CFI_MASK; 1078 prio = (rule->h_ext.vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 1079 prio_mask = (rule->m_ext.vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; 1080 1081 if (cfi == VLAN_TAG_PRESENT && cfi_mask == VLAN_TAG_PRESENT) { 1082 vlan |= RQFPR_CFI; 1083 vlan_mask |= RQFPR_CFI; 1084 } else if (cfi != VLAN_TAG_PRESENT && cfi_mask == VLAN_TAG_PRESENT) { 1085 vlan_mask |= RQFPR_CFI; 1086 } 1087 } 1088 1089 switch (rule->flow_type & ~FLOW_EXT) { 1090 case TCP_V4_FLOW: 1091 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan, 1092 RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab); 1093 gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec, 1094 &rule->m_u.tcp_ip4_spec, tab); 1095 break; 1096 case UDP_V4_FLOW: 1097 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan, 1098 RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab); 1099 gfar_set_basic_ip(&rule->h_u.udp_ip4_spec, 1100 &rule->m_u.udp_ip4_spec, tab); 1101 break; 1102 case SCTP_V4_FLOW: 1103 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask, 1104 tab); 1105 gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab); 1106 gfar_set_basic_ip((struct ethtool_tcpip4_spec *) &rule->h_u, 1107 (struct ethtool_tcpip4_spec *) &rule->m_u, tab); 1108 break; 1109 case IP_USER_FLOW: 1110 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask, 1111 tab); 1112 gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u, 1113 (struct ethtool_usrip4_spec *) &rule->m_u, tab); 1114 break; 1115 case ETHER_FLOW: 1116 if (vlan) 1117 gfar_set_parse_bits(vlan, vlan_mask, tab); 1118 gfar_set_ether((struct ethhdr *) &rule->h_u, 1119 (struct ethhdr *) &rule->m_u, tab); 1120 break; 1121 default: 1122 return -1; 1123 } 1124 1125 /* Set the vlan attributes in the end */ 1126 if (vlan) { 1127 gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab); 1128 gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab); 1129 } 1130 1131 /* If there has been nothing written till now, it must be a default */ 1132 if (tab->index == old_index) { 1133 gfar_set_mask(0xFFFFFFFF, tab); 1134 tab->fe[tab->index].ctrl = 0x20; 1135 tab->fe[tab->index].prop = 0x0; 1136 tab->index++; 1137 } 1138 1139 /* Remove last AND */ 1140 tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND); 1141 1142 /* Specify which queue to use or to drop */ 1143 if (rule->ring_cookie == RX_CLS_FLOW_DISC) 1144 tab->fe[tab->index - 1].ctrl |= RQFCR_RJE; 1145 else 1146 tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10); 1147 1148 /* Only big enough entries can be clustered */ 1149 if (tab->index > (old_index + 2)) { 1150 tab->fe[old_index + 1].ctrl |= RQFCR_CLE; 1151 tab->fe[tab->index - 1].ctrl |= RQFCR_CLE; 1152 } 1153 1154 /* In rare cases the cache can be full while there is free space in hw */ 1155 if (tab->index > MAX_FILER_CACHE_IDX - 1) 1156 return -EBUSY; 1157 1158 return 0; 1159 } 1160 1161 /* Copy size filer entries */ 1162 static void gfar_copy_filer_entries(struct gfar_filer_entry dst[0], 1163 struct gfar_filer_entry src[0], s32 size) 1164 { 1165 while (size > 0) { 1166 size--; 1167 dst[size].ctrl = src[size].ctrl; 1168 dst[size].prop = src[size].prop; 1169 } 1170 } 1171 1172 /* Delete the contents of the filer-table between start and end 1173 * and collapse them */ 1174 static int gfar_trim_filer_entries(u32 begin, u32 end, struct filer_table *tab) 1175 { 1176 int length; 1177 if (end > MAX_FILER_CACHE_IDX || end < begin) 1178 return -EINVAL; 1179 1180 end++; 1181 length = end - begin; 1182 1183 /* Copy */ 1184 while (end < tab->index) { 1185 tab->fe[begin].ctrl = tab->fe[end].ctrl; 1186 tab->fe[begin++].prop = tab->fe[end++].prop; 1187 1188 } 1189 /* Fill up with don't cares */ 1190 while (begin < tab->index) { 1191 tab->fe[begin].ctrl = 0x60; 1192 tab->fe[begin].prop = 0xFFFFFFFF; 1193 begin++; 1194 } 1195 1196 tab->index -= length; 1197 return 0; 1198 } 1199 1200 /* Make space on the wanted location */ 1201 static int gfar_expand_filer_entries(u32 begin, u32 length, 1202 struct filer_table *tab) 1203 { 1204 if (length == 0 || length + tab->index > MAX_FILER_CACHE_IDX || begin 1205 > MAX_FILER_CACHE_IDX) 1206 return -EINVAL; 1207 1208 gfar_copy_filer_entries(&(tab->fe[begin + length]), &(tab->fe[begin]), 1209 tab->index - length + 1); 1210 1211 tab->index += length; 1212 return 0; 1213 } 1214 1215 static int gfar_get_next_cluster_start(int start, struct filer_table *tab) 1216 { 1217 for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) { 1218 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE)) 1219 == (RQFCR_AND | RQFCR_CLE)) 1220 return start; 1221 } 1222 return -1; 1223 } 1224 1225 static int gfar_get_next_cluster_end(int start, struct filer_table *tab) 1226 { 1227 for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) { 1228 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE)) 1229 == (RQFCR_CLE)) 1230 return start; 1231 } 1232 return -1; 1233 } 1234 1235 /* 1236 * Uses hardwares clustering option to reduce 1237 * the number of filer table entries 1238 */ 1239 static void gfar_cluster_filer(struct filer_table *tab) 1240 { 1241 s32 i = -1, j, iend, jend; 1242 1243 while ((i = gfar_get_next_cluster_start(++i, tab)) != -1) { 1244 j = i; 1245 while ((j = gfar_get_next_cluster_start(++j, tab)) != -1) { 1246 /* 1247 * The cluster entries self and the previous one 1248 * (a mask) must be identical! 1249 */ 1250 if (tab->fe[i].ctrl != tab->fe[j].ctrl) 1251 break; 1252 if (tab->fe[i].prop != tab->fe[j].prop) 1253 break; 1254 if (tab->fe[i - 1].ctrl != tab->fe[j - 1].ctrl) 1255 break; 1256 if (tab->fe[i - 1].prop != tab->fe[j - 1].prop) 1257 break; 1258 iend = gfar_get_next_cluster_end(i, tab); 1259 jend = gfar_get_next_cluster_end(j, tab); 1260 if (jend == -1 || iend == -1) 1261 break; 1262 /* 1263 * First we make some free space, where our cluster 1264 * element should be. Then we copy it there and finally 1265 * delete in from its old location. 1266 */ 1267 1268 if (gfar_expand_filer_entries(iend, (jend - j), tab) 1269 == -EINVAL) 1270 break; 1271 1272 gfar_copy_filer_entries(&(tab->fe[iend + 1]), 1273 &(tab->fe[jend + 1]), jend - j); 1274 1275 if (gfar_trim_filer_entries(jend - 1, 1276 jend + (jend - j), tab) == -EINVAL) 1277 return; 1278 1279 /* Mask out cluster bit */ 1280 tab->fe[iend].ctrl &= ~(RQFCR_CLE); 1281 } 1282 } 1283 } 1284 1285 /* Swaps the masked bits of a1<>a2 and b1<>b2 */ 1286 static void gfar_swap_bits(struct gfar_filer_entry *a1, 1287 struct gfar_filer_entry *a2, struct gfar_filer_entry *b1, 1288 struct gfar_filer_entry *b2, u32 mask) 1289 { 1290 u32 temp[4]; 1291 temp[0] = a1->ctrl & mask; 1292 temp[1] = a2->ctrl & mask; 1293 temp[2] = b1->ctrl & mask; 1294 temp[3] = b2->ctrl & mask; 1295 1296 a1->ctrl &= ~mask; 1297 a2->ctrl &= ~mask; 1298 b1->ctrl &= ~mask; 1299 b2->ctrl &= ~mask; 1300 1301 a1->ctrl |= temp[1]; 1302 a2->ctrl |= temp[0]; 1303 b1->ctrl |= temp[3]; 1304 b2->ctrl |= temp[2]; 1305 } 1306 1307 /* 1308 * Generate a list consisting of masks values with their start and 1309 * end of validity and block as indicator for parts belonging 1310 * together (glued by ANDs) in mask_table 1311 */ 1312 static u32 gfar_generate_mask_table(struct gfar_mask_entry *mask_table, 1313 struct filer_table *tab) 1314 { 1315 u32 i, and_index = 0, block_index = 1; 1316 1317 for (i = 0; i < tab->index; i++) { 1318 1319 /* LSByte of control = 0 sets a mask */ 1320 if (!(tab->fe[i].ctrl & 0xF)) { 1321 mask_table[and_index].mask = tab->fe[i].prop; 1322 mask_table[and_index].start = i; 1323 mask_table[and_index].block = block_index; 1324 if (and_index >= 1) 1325 mask_table[and_index - 1].end = i - 1; 1326 and_index++; 1327 } 1328 /* cluster starts and ends will be separated because they should 1329 * hold their position */ 1330 if (tab->fe[i].ctrl & RQFCR_CLE) 1331 block_index++; 1332 /* A not set AND indicates the end of a depended block */ 1333 if (!(tab->fe[i].ctrl & RQFCR_AND)) 1334 block_index++; 1335 1336 } 1337 1338 mask_table[and_index - 1].end = i - 1; 1339 1340 return and_index; 1341 } 1342 1343 /* 1344 * Sorts the entries of mask_table by the values of the masks. 1345 * Important: The 0xFF80 flags of the first and last entry of a 1346 * block must hold their position (which queue, CLusterEnable, ReJEct, 1347 * AND) 1348 */ 1349 static void gfar_sort_mask_table(struct gfar_mask_entry *mask_table, 1350 struct filer_table *temp_table, u32 and_index) 1351 { 1352 /* Pointer to compare function (_asc or _desc) */ 1353 int (*gfar_comp)(const void *, const void *); 1354 1355 u32 i, size = 0, start = 0, prev = 1; 1356 u32 old_first, old_last, new_first, new_last; 1357 1358 gfar_comp = &gfar_comp_desc; 1359 1360 for (i = 0; i < and_index; i++) { 1361 1362 if (prev != mask_table[i].block) { 1363 old_first = mask_table[start].start + 1; 1364 old_last = mask_table[i - 1].end; 1365 sort(mask_table + start, size, 1366 sizeof(struct gfar_mask_entry), 1367 gfar_comp, &gfar_swap); 1368 1369 /* Toggle order for every block. This makes the 1370 * thing more efficient! */ 1371 if (gfar_comp == gfar_comp_desc) 1372 gfar_comp = &gfar_comp_asc; 1373 else 1374 gfar_comp = &gfar_comp_desc; 1375 1376 new_first = mask_table[start].start + 1; 1377 new_last = mask_table[i - 1].end; 1378 1379 gfar_swap_bits(&temp_table->fe[new_first], 1380 &temp_table->fe[old_first], 1381 &temp_table->fe[new_last], 1382 &temp_table->fe[old_last], 1383 RQFCR_QUEUE | RQFCR_CLE | 1384 RQFCR_RJE | RQFCR_AND 1385 ); 1386 1387 start = i; 1388 size = 0; 1389 } 1390 size++; 1391 prev = mask_table[i].block; 1392 } 1393 1394 } 1395 1396 /* 1397 * Reduces the number of masks needed in the filer table to save entries 1398 * This is done by sorting the masks of a depended block. A depended block is 1399 * identified by gluing ANDs or CLE. The sorting order toggles after every 1400 * block. Of course entries in scope of a mask must change their location with 1401 * it. 1402 */ 1403 static int gfar_optimize_filer_masks(struct filer_table *tab) 1404 { 1405 struct filer_table *temp_table; 1406 struct gfar_mask_entry *mask_table; 1407 1408 u32 and_index = 0, previous_mask = 0, i = 0, j = 0, size = 0; 1409 s32 ret = 0; 1410 1411 /* We need a copy of the filer table because 1412 * we want to change its order */ 1413 temp_table = kmemdup(tab, sizeof(*temp_table), GFP_KERNEL); 1414 if (temp_table == NULL) 1415 return -ENOMEM; 1416 1417 mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1, 1418 sizeof(struct gfar_mask_entry), GFP_KERNEL); 1419 1420 if (mask_table == NULL) { 1421 ret = -ENOMEM; 1422 goto end; 1423 } 1424 1425 and_index = gfar_generate_mask_table(mask_table, tab); 1426 1427 gfar_sort_mask_table(mask_table, temp_table, and_index); 1428 1429 /* Now we can copy the data from our duplicated filer table to 1430 * the real one in the order the mask table says */ 1431 for (i = 0; i < and_index; i++) { 1432 size = mask_table[i].end - mask_table[i].start + 1; 1433 gfar_copy_filer_entries(&(tab->fe[j]), 1434 &(temp_table->fe[mask_table[i].start]), size); 1435 j += size; 1436 } 1437 1438 /* And finally we just have to check for duplicated masks and drop the 1439 * second ones */ 1440 for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) { 1441 if (tab->fe[i].ctrl == 0x80) { 1442 previous_mask = i++; 1443 break; 1444 } 1445 } 1446 for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) { 1447 if (tab->fe[i].ctrl == 0x80) { 1448 if (tab->fe[i].prop == tab->fe[previous_mask].prop) { 1449 /* Two identical ones found! 1450 * So drop the second one! */ 1451 gfar_trim_filer_entries(i, i, tab); 1452 } else 1453 /* Not identical! */ 1454 previous_mask = i; 1455 } 1456 } 1457 1458 kfree(mask_table); 1459 end: kfree(temp_table); 1460 return ret; 1461 } 1462 1463 /* Write the bit-pattern from software's buffer to hardware registers */ 1464 static int gfar_write_filer_table(struct gfar_private *priv, 1465 struct filer_table *tab) 1466 { 1467 u32 i = 0; 1468 if (tab->index > MAX_FILER_IDX - 1) 1469 return -EBUSY; 1470 1471 /* Avoid inconsistent filer table to be processed */ 1472 lock_rx_qs(priv); 1473 1474 /* Fill regular entries */ 1475 for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].ctrl); i++) 1476 gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop); 1477 /* Fill the rest with fall-troughs */ 1478 for (; i < MAX_FILER_IDX - 1; i++) 1479 gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF); 1480 /* Last entry must be default accept 1481 * because that's what people expect */ 1482 gfar_write_filer(priv, i, 0x20, 0x0); 1483 1484 unlock_rx_qs(priv); 1485 1486 return 0; 1487 } 1488 1489 static int gfar_check_capability(struct ethtool_rx_flow_spec *flow, 1490 struct gfar_private *priv) 1491 { 1492 1493 if (flow->flow_type & FLOW_EXT) { 1494 if (~flow->m_ext.data[0] || ~flow->m_ext.data[1]) 1495 netdev_warn(priv->ndev, 1496 "User-specific data not supported!\n"); 1497 if (~flow->m_ext.vlan_etype) 1498 netdev_warn(priv->ndev, 1499 "VLAN-etype not supported!\n"); 1500 } 1501 if (flow->flow_type == IP_USER_FLOW) 1502 if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4) 1503 netdev_warn(priv->ndev, 1504 "IP-Version differing from IPv4 not supported!\n"); 1505 1506 return 0; 1507 } 1508 1509 static int gfar_process_filer_changes(struct gfar_private *priv) 1510 { 1511 struct ethtool_flow_spec_container *j; 1512 struct filer_table *tab; 1513 s32 i = 0; 1514 s32 ret = 0; 1515 1516 /* So index is set to zero, too! */ 1517 tab = kzalloc(sizeof(*tab), GFP_KERNEL); 1518 if (tab == NULL) 1519 return -ENOMEM; 1520 1521 /* Now convert the existing filer data from flow_spec into 1522 * filer tables binary format */ 1523 list_for_each_entry(j, &priv->rx_list.list, list) { 1524 ret = gfar_convert_to_filer(&j->fs, tab); 1525 if (ret == -EBUSY) { 1526 netdev_err(priv->ndev, "Rule not added: No free space!\n"); 1527 goto end; 1528 } 1529 if (ret == -1) { 1530 netdev_err(priv->ndev, "Rule not added: Unsupported Flow-type!\n"); 1531 goto end; 1532 } 1533 } 1534 1535 i = tab->index; 1536 1537 /* Optimizations to save entries */ 1538 gfar_cluster_filer(tab); 1539 gfar_optimize_filer_masks(tab); 1540 1541 pr_debug("\n\tSummary:\n" 1542 "\tData on hardware: %d\n" 1543 "\tCompression rate: %d%%\n", 1544 tab->index, 100 - (100 * tab->index) / i); 1545 1546 /* Write everything to hardware */ 1547 ret = gfar_write_filer_table(priv, tab); 1548 if (ret == -EBUSY) { 1549 netdev_err(priv->ndev, "Rule not added: No free space!\n"); 1550 goto end; 1551 } 1552 1553 end: kfree(tab); 1554 return ret; 1555 } 1556 1557 static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow) 1558 { 1559 u32 i = 0; 1560 1561 for (i = 0; i < sizeof(flow->m_u); i++) 1562 flow->m_u.hdata[i] ^= 0xFF; 1563 1564 flow->m_ext.vlan_etype ^= 0xFFFF; 1565 flow->m_ext.vlan_tci ^= 0xFFFF; 1566 flow->m_ext.data[0] ^= ~0; 1567 flow->m_ext.data[1] ^= ~0; 1568 } 1569 1570 static int gfar_add_cls(struct gfar_private *priv, 1571 struct ethtool_rx_flow_spec *flow) 1572 { 1573 struct ethtool_flow_spec_container *temp, *comp; 1574 int ret = 0; 1575 1576 temp = kmalloc(sizeof(*temp), GFP_KERNEL); 1577 if (temp == NULL) 1578 return -ENOMEM; 1579 memcpy(&temp->fs, flow, sizeof(temp->fs)); 1580 1581 gfar_invert_masks(&temp->fs); 1582 ret = gfar_check_capability(&temp->fs, priv); 1583 if (ret) 1584 goto clean_mem; 1585 /* Link in the new element at the right @location */ 1586 if (list_empty(&priv->rx_list.list)) { 1587 ret = gfar_check_filer_hardware(priv); 1588 if (ret != 0) 1589 goto clean_mem; 1590 list_add(&temp->list, &priv->rx_list.list); 1591 goto process; 1592 } else { 1593 1594 list_for_each_entry(comp, &priv->rx_list.list, list) { 1595 if (comp->fs.location > flow->location) { 1596 list_add_tail(&temp->list, &comp->list); 1597 goto process; 1598 } 1599 if (comp->fs.location == flow->location) { 1600 netdev_err(priv->ndev, 1601 "Rule not added: ID %d not free!\n", 1602 flow->location); 1603 ret = -EBUSY; 1604 goto clean_mem; 1605 } 1606 } 1607 list_add_tail(&temp->list, &priv->rx_list.list); 1608 } 1609 1610 process: 1611 ret = gfar_process_filer_changes(priv); 1612 if (ret) 1613 goto clean_list; 1614 priv->rx_list.count++; 1615 return ret; 1616 1617 clean_list: 1618 list_del(&temp->list); 1619 clean_mem: 1620 kfree(temp); 1621 return ret; 1622 } 1623 1624 static int gfar_del_cls(struct gfar_private *priv, u32 loc) 1625 { 1626 struct ethtool_flow_spec_container *comp; 1627 u32 ret = -EINVAL; 1628 1629 if (list_empty(&priv->rx_list.list)) 1630 return ret; 1631 1632 list_for_each_entry(comp, &priv->rx_list.list, list) { 1633 if (comp->fs.location == loc) { 1634 list_del(&comp->list); 1635 kfree(comp); 1636 priv->rx_list.count--; 1637 gfar_process_filer_changes(priv); 1638 ret = 0; 1639 break; 1640 } 1641 } 1642 1643 return ret; 1644 1645 } 1646 1647 static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd) 1648 { 1649 struct ethtool_flow_spec_container *comp; 1650 u32 ret = -EINVAL; 1651 1652 list_for_each_entry(comp, &priv->rx_list.list, list) { 1653 if (comp->fs.location == cmd->fs.location) { 1654 memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs)); 1655 gfar_invert_masks(&cmd->fs); 1656 ret = 0; 1657 break; 1658 } 1659 } 1660 1661 return ret; 1662 } 1663 1664 static int gfar_get_cls_all(struct gfar_private *priv, 1665 struct ethtool_rxnfc *cmd, u32 *rule_locs) 1666 { 1667 struct ethtool_flow_spec_container *comp; 1668 u32 i = 0; 1669 1670 list_for_each_entry(comp, &priv->rx_list.list, list) { 1671 if (i == cmd->rule_cnt) 1672 return -EMSGSIZE; 1673 rule_locs[i] = comp->fs.location; 1674 i++; 1675 } 1676 1677 cmd->data = MAX_FILER_IDX; 1678 cmd->rule_cnt = i; 1679 1680 return 0; 1681 } 1682 1683 static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd) 1684 { 1685 struct gfar_private *priv = netdev_priv(dev); 1686 int ret = 0; 1687 1688 mutex_lock(&priv->rx_queue_access); 1689 1690 switch (cmd->cmd) { 1691 case ETHTOOL_SRXFH: 1692 ret = gfar_set_hash_opts(priv, cmd); 1693 break; 1694 case ETHTOOL_SRXCLSRLINS: 1695 if ((cmd->fs.ring_cookie != RX_CLS_FLOW_DISC && 1696 cmd->fs.ring_cookie >= priv->num_rx_queues) || 1697 cmd->fs.location >= MAX_FILER_IDX) { 1698 ret = -EINVAL; 1699 break; 1700 } 1701 ret = gfar_add_cls(priv, &cmd->fs); 1702 break; 1703 case ETHTOOL_SRXCLSRLDEL: 1704 ret = gfar_del_cls(priv, cmd->fs.location); 1705 break; 1706 default: 1707 ret = -EINVAL; 1708 } 1709 1710 mutex_unlock(&priv->rx_queue_access); 1711 1712 return ret; 1713 } 1714 1715 static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd, 1716 u32 *rule_locs) 1717 { 1718 struct gfar_private *priv = netdev_priv(dev); 1719 int ret = 0; 1720 1721 switch (cmd->cmd) { 1722 case ETHTOOL_GRXRINGS: 1723 cmd->data = priv->num_rx_queues; 1724 break; 1725 case ETHTOOL_GRXCLSRLCNT: 1726 cmd->rule_cnt = priv->rx_list.count; 1727 break; 1728 case ETHTOOL_GRXCLSRULE: 1729 ret = gfar_get_cls(priv, cmd); 1730 break; 1731 case ETHTOOL_GRXCLSRLALL: 1732 ret = gfar_get_cls_all(priv, cmd, rule_locs); 1733 break; 1734 default: 1735 ret = -EINVAL; 1736 break; 1737 } 1738 1739 return ret; 1740 } 1741 1742 const struct ethtool_ops gfar_ethtool_ops = { 1743 .get_settings = gfar_gsettings, 1744 .set_settings = gfar_ssettings, 1745 .get_drvinfo = gfar_gdrvinfo, 1746 .get_regs_len = gfar_reglen, 1747 .get_regs = gfar_get_regs, 1748 .get_link = ethtool_op_get_link, 1749 .get_coalesce = gfar_gcoalesce, 1750 .set_coalesce = gfar_scoalesce, 1751 .get_ringparam = gfar_gringparam, 1752 .set_ringparam = gfar_sringparam, 1753 .get_strings = gfar_gstrings, 1754 .get_sset_count = gfar_sset_count, 1755 .get_ethtool_stats = gfar_fill_stats, 1756 .get_msglevel = gfar_get_msglevel, 1757 .set_msglevel = gfar_set_msglevel, 1758 #ifdef CONFIG_PM 1759 .get_wol = gfar_get_wol, 1760 .set_wol = gfar_set_wol, 1761 #endif 1762 .set_rxnfc = gfar_set_nfc, 1763 .get_rxnfc = gfar_get_nfc, 1764 }; 1765