3 * Copyright (c) 2004 Joerg Sonnenberger <joerg@bec.de>. All rights reserved.
5 * Copyright (c) 2001-2006, Intel Corporation
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived from
20 * this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
35 * Copyright (c) 2005 The DragonFly Project. All rights reserved.
37 * This code is derived from software contributed to The DragonFly Project
38 * by Matthew Dillon <dillon@backplane.com>
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
50 * 3. Neither the name of The DragonFly Project nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific, prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
57 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
58 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
59 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
60 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
61 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
62 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
63 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
64 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * $DragonFly: src/sys/dev/netif/em/if_em.c,v 1.54 2007/01/21 10:44:45 sephe Exp $
71 * SERIALIZATION API RULES:
73 * - If the driver uses the same serializer for the interrupt as for the
74 * ifnet, most of the serialization will be done automatically for the
77 * - ifmedia entry points will be serialized by the ifmedia code using the
80 * - if_* entry points except for if_input will be serialized by the IF
81 * and protocol layers.
83 * - The device driver must be sure to serialize access from timeout code
84 * installed by the device driver.
86 * - The device driver typically holds the serializer at the time it wishes
87 * to call if_input. If so, it should pass the serializer to if_input and
88 * note that the serializer might be dropped temporarily by if_input
89 * (e.g. in case it has to bridge the packet to another interface).
91 * NOTE! Since callers into the device driver hold the ifnet serializer,
92 * the device driver may be holding a serializer at the time it calls
93 * if_input even if it is not serializer-aware.
96 #include "opt_polling.h"
99 #include <sys/param.h>
101 #include <sys/endian.h>
102 #include <sys/kernel.h>
104 #include <sys/malloc.h>
105 #include <sys/mbuf.h>
106 #include <sys/module.h>
107 #include <sys/rman.h>
108 #include <sys/serialize.h>
109 #include <sys/socket.h>
110 #include <sys/sockio.h>
111 #include <sys/sysctl.h>
114 #include <net/ethernet.h>
116 #include <net/if_arp.h>
117 #include <net/if_dl.h>
118 #include <net/if_media.h>
119 #include <net/if_types.h>
120 #include <net/ifq_var.h>
121 #include <net/vlan/if_vlan_var.h>
124 #include <netinet/in.h>
125 #include <netinet/in_systm.h>
126 #include <netinet/in_var.h>
127 #include <netinet/ip.h>
128 #include <netinet/tcp.h>
129 #include <netinet/udp.h>
132 #include <dev/netif/em/if_em_hw.h>
133 #include <dev/netif/em/if_em.h>
135 #define EM_X60_WORKAROUND
137 /*********************************************************************
138 * Set this to one to display debug statistics
139 *********************************************************************/
140 int em_display_debug_stats = 0;
142 /*********************************************************************
144 *********************************************************************/
146 char em_driver_version[] = "6.2.9";
149 /*********************************************************************
150 * PCI Device ID Table
152 * Used by probe to select devices to load on
153 * Last field stores an index into em_strings
154 * Last entry must be all 0s
156 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, String Index }
157 *********************************************************************/
159 static em_vendor_info_t em_vendor_info_array[] =
161 /* Intel(R) PRO/1000 Network Connection */
162 { 0x8086, E1000_DEV_ID_82540EM, PCI_ANY_ID, PCI_ANY_ID, 0},
163 { 0x8086, E1000_DEV_ID_82540EM_LOM, PCI_ANY_ID, PCI_ANY_ID, 0},
164 { 0x8086, E1000_DEV_ID_82540EP, PCI_ANY_ID, PCI_ANY_ID, 0},
165 { 0x8086, E1000_DEV_ID_82540EP_LOM, PCI_ANY_ID, PCI_ANY_ID, 0},
166 { 0x8086, E1000_DEV_ID_82540EP_LP, PCI_ANY_ID, PCI_ANY_ID, 0},
168 { 0x8086, E1000_DEV_ID_82541EI, PCI_ANY_ID, PCI_ANY_ID, 0},
169 { 0x8086, E1000_DEV_ID_82541ER, PCI_ANY_ID, PCI_ANY_ID, 0},
170 { 0x8086, E1000_DEV_ID_82541ER_LOM, PCI_ANY_ID, PCI_ANY_ID, 0},
171 { 0x8086, E1000_DEV_ID_82541EI_MOBILE, PCI_ANY_ID, PCI_ANY_ID, 0},
172 { 0x8086, E1000_DEV_ID_82541GI, PCI_ANY_ID, PCI_ANY_ID, 0},
173 { 0x8086, E1000_DEV_ID_82541GI_LF, PCI_ANY_ID, PCI_ANY_ID, 0},
174 { 0x8086, E1000_DEV_ID_82541GI_MOBILE, PCI_ANY_ID, PCI_ANY_ID, 0},
176 { 0x8086, E1000_DEV_ID_82542, PCI_ANY_ID, PCI_ANY_ID, 0},
178 { 0x8086, E1000_DEV_ID_82543GC_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
179 { 0x8086, E1000_DEV_ID_82543GC_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
181 { 0x8086, E1000_DEV_ID_82544EI_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
182 { 0x8086, E1000_DEV_ID_82544EI_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
183 { 0x8086, E1000_DEV_ID_82544GC_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
184 { 0x8086, E1000_DEV_ID_82544GC_LOM, PCI_ANY_ID, PCI_ANY_ID, 0},
186 { 0x8086, E1000_DEV_ID_82545EM_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
187 { 0x8086, E1000_DEV_ID_82545EM_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
188 { 0x8086, E1000_DEV_ID_82545GM_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
189 { 0x8086, E1000_DEV_ID_82545GM_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
190 { 0x8086, E1000_DEV_ID_82545GM_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0},
192 { 0x8086, E1000_DEV_ID_82546EB_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
193 { 0x8086, E1000_DEV_ID_82546EB_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
194 { 0x8086, E1000_DEV_ID_82546EB_QUAD_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
195 { 0x8086, E1000_DEV_ID_82546GB_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
196 { 0x8086, E1000_DEV_ID_82546GB_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
197 { 0x8086, E1000_DEV_ID_82546GB_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0},
198 { 0x8086, E1000_DEV_ID_82546GB_PCIE, PCI_ANY_ID, PCI_ANY_ID, 0},
199 { 0x8086, E1000_DEV_ID_82546GB_QUAD_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
200 { 0x8086, E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3,
201 PCI_ANY_ID, PCI_ANY_ID, 0},
203 { 0x8086, E1000_DEV_ID_82547EI, PCI_ANY_ID, PCI_ANY_ID, 0},
204 { 0x8086, E1000_DEV_ID_82547EI_MOBILE, PCI_ANY_ID, PCI_ANY_ID, 0},
205 { 0x8086, E1000_DEV_ID_82547GI, PCI_ANY_ID, PCI_ANY_ID, 0},
207 { 0x8086, E1000_DEV_ID_82571EB_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
208 { 0x8086, E1000_DEV_ID_82571EB_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
209 { 0x8086, E1000_DEV_ID_82571EB_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0},
210 { 0x8086, E1000_DEV_ID_82571EB_QUAD_COPPER,
211 PCI_ANY_ID, PCI_ANY_ID, 0},
212 { 0x8086, E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE,
213 PCI_ANY_ID, PCI_ANY_ID, 0},
215 { 0x8086, E1000_DEV_ID_82572EI_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0},
216 { 0x8086, E1000_DEV_ID_82572EI_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0},
217 { 0x8086, E1000_DEV_ID_82572EI_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0},
218 { 0x8086, E1000_DEV_ID_82572EI, PCI_ANY_ID, PCI_ANY_ID, 0},
220 { 0x8086, E1000_DEV_ID_82573E, PCI_ANY_ID, PCI_ANY_ID, 0},
221 { 0x8086, E1000_DEV_ID_82573E_IAMT, PCI_ANY_ID, PCI_ANY_ID, 0},
222 { 0x8086, E1000_DEV_ID_82573L, PCI_ANY_ID, PCI_ANY_ID, 0},
224 { 0x8086, E1000_DEV_ID_80003ES2LAN_COPPER_SPT,
225 PCI_ANY_ID, PCI_ANY_ID, 0},
226 { 0x8086, E1000_DEV_ID_80003ES2LAN_SERDES_SPT,
227 PCI_ANY_ID, PCI_ANY_ID, 0},
228 { 0x8086, E1000_DEV_ID_80003ES2LAN_COPPER_DPT,
229 PCI_ANY_ID, PCI_ANY_ID, 0},
230 { 0x8086, E1000_DEV_ID_80003ES2LAN_SERDES_DPT,
231 PCI_ANY_ID, PCI_ANY_ID, 0},
233 { 0x8086, E1000_DEV_ID_ICH8_IGP_M_AMT, PCI_ANY_ID, PCI_ANY_ID, 0},
234 { 0x8086, E1000_DEV_ID_ICH8_IGP_AMT, PCI_ANY_ID, PCI_ANY_ID, 0},
235 { 0x8086, E1000_DEV_ID_ICH8_IGP_C, PCI_ANY_ID, PCI_ANY_ID, 0},
236 { 0x8086, E1000_DEV_ID_ICH8_IFE, PCI_ANY_ID, PCI_ANY_ID, 0},
237 { 0x8086, E1000_DEV_ID_ICH8_IFE_GT, PCI_ANY_ID, PCI_ANY_ID, 0},
238 { 0x8086, E1000_DEV_ID_ICH8_IFE_G, PCI_ANY_ID, PCI_ANY_ID, 0},
239 { 0x8086, E1000_DEV_ID_ICH8_IGP_M, PCI_ANY_ID, PCI_ANY_ID, 0},
241 { 0x8086, 0x101A, PCI_ANY_ID, PCI_ANY_ID, 0},
242 { 0x8086, 0x1014, PCI_ANY_ID, PCI_ANY_ID, 0},
243 /* required last entry */
247 /*********************************************************************
248 * Table of branding strings for all supported NICs.
249 *********************************************************************/
251 static const char *em_strings[] = {
252 "Intel(R) PRO/1000 Network Connection"
255 /*********************************************************************
256 * Function prototypes
257 *********************************************************************/
258 static int em_probe(device_t);
259 static int em_attach(device_t);
260 static int em_detach(device_t);
261 static int em_shutdown(device_t);
262 static void em_intr(void *);
263 static int em_suspend(device_t);
264 static int em_resume(device_t);
265 static void em_start(struct ifnet *);
266 static int em_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
267 static void em_watchdog(struct ifnet *);
268 static void em_init(void *);
269 static void em_stop(void *);
270 static void em_media_status(struct ifnet *, struct ifmediareq *);
271 static int em_media_change(struct ifnet *);
272 static void em_identify_hardware(struct adapter *);
273 static int em_allocate_pci_resources(device_t);
274 static void em_free_pci_resources(device_t);
275 static void em_local_timer(void *);
276 static int em_hardware_init(struct adapter *);
277 static void em_setup_interface(device_t, struct adapter *);
278 static int em_setup_transmit_structures(struct adapter *);
279 static void em_initialize_transmit_unit(struct adapter *);
280 static int em_setup_receive_structures(struct adapter *);
281 static void em_initialize_receive_unit(struct adapter *);
282 static void em_enable_intr(struct adapter *);
283 static void em_disable_intr(struct adapter *);
284 static void em_free_transmit_structures(struct adapter *);
285 static void em_free_receive_structures(struct adapter *);
286 static void em_update_stats_counters(struct adapter *);
287 static void em_txeof(struct adapter *);
288 static int em_allocate_receive_structures(struct adapter *);
289 static void em_rxeof(struct adapter *, int);
290 static void em_receive_checksum(struct adapter *, struct em_rx_desc *,
292 static void em_transmit_checksum_setup(struct adapter *, struct mbuf *,
293 uint32_t *, uint32_t *);
294 static void em_set_promisc(struct adapter *);
295 static void em_disable_promisc(struct adapter *);
296 static void em_set_multi(struct adapter *);
297 static void em_print_hw_stats(struct adapter *);
298 static void em_update_link_status(struct adapter *);
299 static int em_get_buf(int i, struct adapter *, struct mbuf *, int how);
300 static void em_enable_vlans(struct adapter *);
301 static void em_disable_vlans(struct adapter *);
302 static int em_encap(struct adapter *, struct mbuf *);
303 static void em_smartspeed(struct adapter *);
304 static int em_82547_fifo_workaround(struct adapter *, int);
305 static void em_82547_update_fifo_head(struct adapter *, int);
306 static int em_82547_tx_fifo_reset(struct adapter *);
307 static void em_82547_move_tail(void *);
308 static void em_82547_move_tail_serialized(struct adapter *);
309 static int em_dma_malloc(struct adapter *, bus_size_t,
310 struct em_dma_alloc *);
311 static void em_dma_free(struct adapter *, struct em_dma_alloc *);
312 static void em_print_debug_info(struct adapter *);
313 static int em_is_valid_ether_addr(uint8_t *);
314 static int em_sysctl_stats(SYSCTL_HANDLER_ARGS);
315 static int em_sysctl_debug_info(SYSCTL_HANDLER_ARGS);
316 static uint32_t em_fill_descriptors(bus_addr_t address, uint32_t length,
317 PDESC_ARRAY desc_array);
318 static int em_sysctl_int_delay(SYSCTL_HANDLER_ARGS);
319 static int em_sysctl_int_throttle(SYSCTL_HANDLER_ARGS);
320 static void em_add_int_delay_sysctl(struct adapter *, const char *,
322 struct em_int_delay_info *, int, int);
324 /*********************************************************************
325 * FreeBSD Device Interface Entry Points
326 *********************************************************************/
328 static device_method_t em_methods[] = {
329 /* Device interface */
330 DEVMETHOD(device_probe, em_probe),
331 DEVMETHOD(device_attach, em_attach),
332 DEVMETHOD(device_detach, em_detach),
333 DEVMETHOD(device_shutdown, em_shutdown),
334 DEVMETHOD(device_suspend, em_suspend),
335 DEVMETHOD(device_resume, em_resume),
339 static driver_t em_driver = {
340 "em", em_methods, sizeof(struct adapter),
343 static devclass_t em_devclass;
345 DECLARE_DUMMY_MODULE(if_em);
346 DRIVER_MODULE(if_em, pci, em_driver, em_devclass, 0, 0);
348 /*********************************************************************
349 * Tunable default values.
350 *********************************************************************/
352 #define E1000_TICKS_TO_USECS(ticks) ((1024 * (ticks) + 500) / 1000)
353 #define E1000_USECS_TO_TICKS(usecs) ((1000 * (usecs) + 512) / 1024)
355 static int em_tx_int_delay_dflt = E1000_TICKS_TO_USECS(EM_TIDV);
356 static int em_rx_int_delay_dflt = E1000_TICKS_TO_USECS(EM_RDTR);
357 static int em_tx_abs_int_delay_dflt = E1000_TICKS_TO_USECS(EM_TADV);
358 static int em_rx_abs_int_delay_dflt = E1000_TICKS_TO_USECS(EM_RADV);
359 static int em_int_throttle_ceil = 10000;
360 static int em_rxd = EM_DEFAULT_RXD;
361 static int em_txd = EM_DEFAULT_TXD;
362 static int em_smart_pwr_down = FALSE;
364 TUNABLE_INT("hw.em.tx_int_delay", &em_tx_int_delay_dflt);
365 TUNABLE_INT("hw.em.rx_int_delay", &em_rx_int_delay_dflt);
366 TUNABLE_INT("hw.em.tx_abs_int_delay", &em_tx_abs_int_delay_dflt);
367 TUNABLE_INT("hw.em.rx_abs_int_delay", &em_rx_abs_int_delay_dflt);
368 TUNABLE_INT("hw.em.int_throttle_ceil", &em_int_throttle_ceil);
369 TUNABLE_INT("hw.em.rxd", &em_rxd);
370 TUNABLE_INT("hw.em.txd", &em_txd);
371 TUNABLE_INT("hw.em.smart_pwr_down", &em_smart_pwr_down);
374 * Kernel trace for characterization of operations
376 #if !defined(KTR_IF_EM)
377 #define KTR_IF_EM KTR_ALL
379 KTR_INFO_MASTER(if_em);
380 KTR_INFO(KTR_IF_EM, if_em, intr_beg, 0, "intr begin", 0);
381 KTR_INFO(KTR_IF_EM, if_em, intr_end, 1, "intr end", 0);
382 #ifdef DEVICE_POLLING
383 KTR_INFO(KTR_IF_EM, if_em, poll_beg, 2, "poll begin", 0);
384 KTR_INFO(KTR_IF_EM, if_em, poll_end, 3, "poll end", 0);
386 KTR_INFO(KTR_IF_EM, if_em, pkt_receive, 4, "rx packet", 0);
387 KTR_INFO(KTR_IF_EM, if_em, pkt_txqueue, 5, "tx packet", 0);
388 KTR_INFO(KTR_IF_EM, if_em, pkt_txclean, 6, "tx clean", 0);
389 #define logif(name) KTR_LOG(if_em_ ## name)
391 /*********************************************************************
392 * Device identification routine
394 * em_probe determines if the driver should be loaded on
395 * adapter based on PCI vendor/device id of the adapter.
397 * return 0 on success, positive on failure
398 *********************************************************************/
401 em_probe(device_t dev)
403 em_vendor_info_t *ent;
405 uint16_t pci_vendor_id = 0;
406 uint16_t pci_device_id = 0;
407 uint16_t pci_subvendor_id = 0;
408 uint16_t pci_subdevice_id = 0;
409 char adapter_name[60];
411 INIT_DEBUGOUT("em_probe: begin");
413 pci_vendor_id = pci_get_vendor(dev);
414 if (pci_vendor_id != EM_VENDOR_ID)
417 pci_device_id = pci_get_device(dev);
418 pci_subvendor_id = pci_get_subvendor(dev);
419 pci_subdevice_id = pci_get_subdevice(dev);
421 ent = em_vendor_info_array;
422 while (ent->vendor_id != 0) {
423 if ((pci_vendor_id == ent->vendor_id) &&
424 (pci_device_id == ent->device_id) &&
426 ((pci_subvendor_id == ent->subvendor_id) ||
427 (ent->subvendor_id == PCI_ANY_ID)) &&
429 ((pci_subdevice_id == ent->subdevice_id) ||
430 (ent->subdevice_id == PCI_ANY_ID))) {
431 ksnprintf(adapter_name, sizeof(adapter_name),
432 "%s, Version - %s", em_strings[ent->index],
434 device_set_desc_copy(dev, adapter_name);
443 /*********************************************************************
444 * Device initialization routine
446 * The attach entry point is called when the driver is being loaded.
447 * This routine identifies the type of hardware, allocates all resources
448 * and initializes the hardware.
450 * return 0 on success, positive on failure
451 *********************************************************************/
454 em_attach(device_t dev)
456 struct adapter *adapter;
460 INIT_DEBUGOUT("em_attach: begin");
462 adapter = device_get_softc(dev);
464 callout_init(&adapter->timer);
465 callout_init(&adapter->tx_fifo_timer);
468 adapter->osdep.dev = dev;
471 sysctl_ctx_init(&adapter->sysctl_ctx);
472 adapter->sysctl_tree = SYSCTL_ADD_NODE(&adapter->sysctl_ctx,
473 SYSCTL_STATIC_CHILDREN(_hw),
475 device_get_nameunit(dev),
479 if (adapter->sysctl_tree == NULL) {
480 device_printf(dev, "Unable to create sysctl tree\n");
484 SYSCTL_ADD_PROC(&adapter->sysctl_ctx,
485 SYSCTL_CHILDREN(adapter->sysctl_tree),
486 OID_AUTO, "debug_info", CTLTYPE_INT|CTLFLAG_RW,
488 em_sysctl_debug_info, "I", "Debug Information");
490 SYSCTL_ADD_PROC(&adapter->sysctl_ctx,
491 SYSCTL_CHILDREN(adapter->sysctl_tree),
492 OID_AUTO, "stats", CTLTYPE_INT|CTLFLAG_RW,
494 em_sysctl_stats, "I", "Statistics");
496 /* Determine hardware revision */
497 em_identify_hardware(adapter);
499 /* Set up some sysctls for the tunable interrupt delays */
500 em_add_int_delay_sysctl(adapter, "rx_int_delay",
501 "receive interrupt delay in usecs",
502 &adapter->rx_int_delay,
503 E1000_REG_OFFSET(&adapter->hw, RDTR),
504 em_rx_int_delay_dflt);
505 em_add_int_delay_sysctl(adapter, "tx_int_delay",
506 "transmit interrupt delay in usecs",
507 &adapter->tx_int_delay,
508 E1000_REG_OFFSET(&adapter->hw, TIDV),
509 em_tx_int_delay_dflt);
510 if (adapter->hw.mac_type >= em_82540) {
511 em_add_int_delay_sysctl(adapter, "rx_abs_int_delay",
512 "receive interrupt delay limit in usecs",
513 &adapter->rx_abs_int_delay,
514 E1000_REG_OFFSET(&adapter->hw, RADV),
515 em_rx_abs_int_delay_dflt);
516 em_add_int_delay_sysctl(adapter, "tx_abs_int_delay",
517 "transmit interrupt delay limit in usecs",
518 &adapter->tx_abs_int_delay,
519 E1000_REG_OFFSET(&adapter->hw, TADV),
520 em_tx_abs_int_delay_dflt);
521 SYSCTL_ADD_PROC(&adapter->sysctl_ctx,
522 SYSCTL_CHILDREN(adapter->sysctl_tree),
523 OID_AUTO, "int_throttle_ceil", CTLTYPE_INT|CTLFLAG_RW,
524 adapter, 0, em_sysctl_int_throttle, "I", NULL);
528 * Validate number of transmit and receive descriptors. It
529 * must not exceed hardware maximum, and must be multiple
532 if (((em_txd * sizeof(struct em_tx_desc)) % EM_DBA_ALIGN) != 0 ||
533 (adapter->hw.mac_type >= em_82544 && em_txd > EM_MAX_TXD) ||
534 (adapter->hw.mac_type < em_82544 && em_txd > EM_MAX_TXD_82543) ||
535 (em_txd < EM_MIN_TXD)) {
536 device_printf(dev, "Using %d TX descriptors instead of %d!\n",
537 EM_DEFAULT_TXD, em_txd);
538 adapter->num_tx_desc = EM_DEFAULT_TXD;
540 adapter->num_tx_desc = em_txd;
543 if (((em_rxd * sizeof(struct em_rx_desc)) % EM_DBA_ALIGN) != 0 ||
544 (adapter->hw.mac_type >= em_82544 && em_rxd > EM_MAX_RXD) ||
545 (adapter->hw.mac_type < em_82544 && em_rxd > EM_MAX_RXD_82543) ||
546 (em_rxd < EM_MIN_RXD)) {
547 device_printf(dev, "Using %d RX descriptors instead of %d!\n",
548 EM_DEFAULT_RXD, em_rxd);
549 adapter->num_rx_desc = EM_DEFAULT_RXD;
551 adapter->num_rx_desc = em_rxd;
554 adapter->hw.autoneg = DO_AUTO_NEG;
555 adapter->hw.wait_autoneg_complete = WAIT_FOR_AUTO_NEG_DEFAULT;
556 adapter->hw.autoneg_advertised = AUTONEG_ADV_DEFAULT;
557 adapter->hw.tbi_compatibility_en = TRUE;
558 adapter->rx_buffer_len = EM_RXBUFFER_2048;
560 adapter->hw.phy_init_script = 1;
561 adapter->hw.phy_reset_disable = FALSE;
563 #ifndef EM_MASTER_SLAVE
564 adapter->hw.master_slave = em_ms_hw_default;
566 adapter->hw.master_slave = EM_MASTER_SLAVE;
570 * Set the max frame size assuming standard ethernet
573 adapter->hw.max_frame_size = ETHERMTU + ETHER_HDR_LEN + ETHER_CRC_LEN;
575 adapter->hw.min_frame_size =
576 MINIMUM_ETHERNET_PACKET_SIZE + ETHER_CRC_LEN;
579 * This controls when hardware reports transmit completion
582 adapter->hw.report_tx_early = 1;
584 error = em_allocate_pci_resources(dev);
588 /* Initialize eeprom parameters */
589 em_init_eeprom_params(&adapter->hw);
591 tsize = roundup2(adapter->num_tx_desc * sizeof(struct em_tx_desc),
594 /* Allocate Transmit Descriptor ring */
595 error = em_dma_malloc(adapter, tsize, &adapter->txdma);
597 device_printf(dev, "Unable to allocate TxDescriptor memory\n");
600 adapter->tx_desc_base = (struct em_tx_desc *)adapter->txdma.dma_vaddr;
602 rsize = roundup2(adapter->num_rx_desc * sizeof(struct em_rx_desc),
605 /* Allocate Receive Descriptor ring */
606 error = em_dma_malloc(adapter, rsize, &adapter->rxdma);
608 device_printf(dev, "Unable to allocate rx_desc memory\n");
611 adapter->rx_desc_base = (struct em_rx_desc *)adapter->rxdma.dma_vaddr;
613 /* Initialize the hardware */
614 if (em_hardware_init(adapter)) {
615 device_printf(dev, "Unable to initialize the hardware\n");
620 /* Copy the permanent MAC address out of the EEPROM */
621 if (em_read_mac_addr(&adapter->hw) < 0) {
623 "EEPROM read error while reading MAC address\n");
628 if (!em_is_valid_ether_addr(adapter->hw.mac_addr)) {
629 device_printf(dev, "Invalid MAC address\n");
634 /* Setup OS specific network interface */
635 em_setup_interface(dev, adapter);
637 /* Initialize statistics */
638 em_clear_hw_cntrs(&adapter->hw);
639 em_update_stats_counters(adapter);
640 adapter->hw.get_link_status = 1;
641 em_update_link_status(adapter);
643 /* Indicate SOL/IDER usage */
644 if (em_check_phy_reset_block(&adapter->hw)) {
645 device_printf(dev, "PHY reset is blocked due to "
646 "SOL/IDER session.\n");
649 /* Identify 82544 on PCIX */
650 em_get_bus_info(&adapter->hw);
651 if (adapter->hw.bus_type == em_bus_type_pcix &&
652 adapter->hw.mac_type == em_82544)
653 adapter->pcix_82544 = TRUE;
655 adapter->pcix_82544 = FALSE;
657 error = bus_setup_intr(dev, adapter->res_interrupt, INTR_NETSAFE,
659 &adapter->int_handler_tag,
660 adapter->interface_data.ac_if.if_serializer);
662 device_printf(dev, "Error registering interrupt handler!\n");
663 ether_ifdetach(&adapter->interface_data.ac_if);
667 INIT_DEBUGOUT("em_attach: end");
675 /*********************************************************************
676 * Device removal routine
678 * The detach entry point is called when the driver is being removed.
679 * This routine stops the adapter and deallocates all the resources
680 * that were allocated for driver operation.
682 * return 0 on success, positive on failure
683 *********************************************************************/
686 em_detach(device_t dev)
688 struct adapter *adapter = device_get_softc(dev);
690 INIT_DEBUGOUT("em_detach: begin");
692 if (device_is_attached(dev)) {
693 struct ifnet *ifp = &adapter->interface_data.ac_if;
695 lwkt_serialize_enter(ifp->if_serializer);
696 adapter->in_detach = 1;
698 em_phy_hw_reset(&adapter->hw);
699 bus_teardown_intr(dev, adapter->res_interrupt,
700 adapter->int_handler_tag);
701 lwkt_serialize_exit(ifp->if_serializer);
705 bus_generic_detach(dev);
707 em_free_pci_resources(dev);
709 /* Free Transmit Descriptor ring */
710 if (adapter->tx_desc_base != NULL) {
711 em_dma_free(adapter, &adapter->txdma);
712 adapter->tx_desc_base = NULL;
715 /* Free Receive Descriptor ring */
716 if (adapter->rx_desc_base != NULL) {
717 em_dma_free(adapter, &adapter->rxdma);
718 adapter->rx_desc_base = NULL;
721 /* Free sysctl tree */
722 if (adapter->sysctl_tree != NULL) {
723 adapter->sysctl_tree = NULL;
724 sysctl_ctx_free(&adapter->sysctl_ctx);
730 /*********************************************************************
732 * Shutdown entry point
734 **********************************************************************/
737 em_shutdown(device_t dev)
739 struct adapter *adapter = device_get_softc(dev);
740 struct ifnet *ifp = &adapter->interface_data.ac_if;
742 lwkt_serialize_enter(ifp->if_serializer);
744 lwkt_serialize_exit(ifp->if_serializer);
750 * Suspend/resume device methods.
753 em_suspend(device_t dev)
755 struct adapter *adapter = device_get_softc(dev);
756 struct ifnet *ifp = &adapter->interface_data.ac_if;
758 lwkt_serialize_enter(ifp->if_serializer);
760 lwkt_serialize_exit(ifp->if_serializer);
765 em_resume(device_t dev)
767 struct adapter *adapter = device_get_softc(dev);
768 struct ifnet *ifp = &adapter->interface_data.ac_if;
770 lwkt_serialize_enter(ifp->if_serializer);
771 ifp->if_flags &= ~IFF_RUNNING;
773 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING))
775 lwkt_serialize_exit(ifp->if_serializer);
777 return bus_generic_resume(dev);
780 /*********************************************************************
781 * Transmit entry point
783 * em_start is called by the stack to initiate a transmit.
784 * The driver will remain in this routine as long as there are
785 * packets to transmit and transmit resources are available.
786 * In case resources are not available stack is notified and
787 * the packet is requeued.
788 **********************************************************************/
791 em_start(struct ifnet *ifp)
794 struct adapter *adapter = ifp->if_softc;
796 ASSERT_SERIALIZED(ifp->if_serializer);
798 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
800 if (!adapter->link_active)
802 while (!ifq_is_empty(&ifp->if_snd)) {
803 m_head = ifq_poll(&ifp->if_snd);
809 if (em_encap(adapter, m_head)) {
810 ifp->if_flags |= IFF_OACTIVE;
813 ifq_dequeue(&ifp->if_snd, m_head);
815 /* Send a copy of the frame to the BPF listener */
816 BPF_MTAP(ifp, m_head);
818 /* Set timeout in case hardware has problems transmitting. */
819 ifp->if_timer = EM_TX_TIMEOUT;
823 /*********************************************************************
826 * em_ioctl is called when the user wants to configure the
829 * return 0 on success, positive on failure
830 **********************************************************************/
833 em_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr)
835 int max_frame_size, mask, error = 0, reinit = 0;
836 struct ifreq *ifr = (struct ifreq *) data;
837 struct adapter *adapter = ifp->if_softc;
838 uint16_t eeprom_data = 0;
840 ASSERT_SERIALIZED(ifp->if_serializer);
842 if (adapter->in_detach)
847 IOCTL_DEBUGOUT("ioctl rcv'd: SIOCSIFMTU (Set Interface MTU)");
848 switch (adapter->hw.mac_type) {
851 * 82573 only supports jumbo frames
852 * if ASPM is disabled.
854 em_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3,
856 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
857 max_frame_size = ETHER_MAX_LEN;
860 /* Allow Jumbo frames */
864 case em_80003es2lan: /* Limit Jumbo Frame size */
865 max_frame_size = 9234;
868 /* ICH8 does not support jumbo frames */
869 max_frame_size = ETHER_MAX_LEN;
872 max_frame_size = MAX_JUMBO_FRAME_SIZE;
876 max_frame_size - ETHER_HDR_LEN - ETHER_CRC_LEN) {
879 ifp->if_mtu = ifr->ifr_mtu;
880 adapter->hw.max_frame_size =
881 ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
882 ifp->if_flags &= ~IFF_RUNNING;
887 IOCTL_DEBUGOUT("ioctl rcv'd: SIOCSIFFLAGS "
888 "(Set Interface Flags)");
889 if (ifp->if_flags & IFF_UP) {
890 if (!(ifp->if_flags & IFF_RUNNING)) {
892 } else if ((ifp->if_flags ^ adapter->if_flags) &
894 em_disable_promisc(adapter);
895 em_set_promisc(adapter);
898 if (ifp->if_flags & IFF_RUNNING)
901 adapter->if_flags = ifp->if_flags;
905 IOCTL_DEBUGOUT("ioctl rcv'd: SIOC(ADD|DEL)MULTI");
906 if (ifp->if_flags & IFF_RUNNING) {
907 em_disable_intr(adapter);
908 em_set_multi(adapter);
909 if (adapter->hw.mac_type == em_82542_rev2_0)
910 em_initialize_receive_unit(adapter);
911 #ifdef DEVICE_POLLING
912 /* Do not enable interrupt if polling(4) is enabled */
913 if ((ifp->if_flags & IFF_POLLING) == 0)
915 em_enable_intr(adapter);
919 /* Check SOL/IDER usage */
920 if (em_check_phy_reset_block(&adapter->hw)) {
921 if_printf(ifp, "Media change is blocked due to "
922 "SOL/IDER session.\n");
927 IOCTL_DEBUGOUT("ioctl rcv'd: SIOCxIFMEDIA "
928 "(Get/Set Interface Media)");
929 error = ifmedia_ioctl(ifp, ifr, &adapter->media, command);
932 IOCTL_DEBUGOUT("ioctl rcv'd: SIOCSIFCAP (Set Capabilities)");
933 mask = ifr->ifr_reqcap ^ ifp->if_capenable;
934 if (mask & IFCAP_HWCSUM) {
935 ifp->if_capenable ^= IFCAP_HWCSUM;
938 if (mask & IFCAP_VLAN_HWTAGGING) {
939 ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
942 if (reinit && (ifp->if_flags & IFF_RUNNING)) {
943 ifp->if_flags &= ~IFF_RUNNING;
948 error = ether_ioctl(ifp, command, data);
955 /*********************************************************************
956 * Watchdog entry point
958 * This routine is called whenever hardware quits transmitting.
960 **********************************************************************/
963 em_watchdog(struct ifnet *ifp)
965 struct adapter *adapter = ifp->if_softc;
968 * If we are in this routine because of pause frames, then
969 * don't reset the hardware.
971 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_TXOFF) {
972 ifp->if_timer = EM_TX_TIMEOUT;
976 if (em_check_for_link(&adapter->hw) == 0)
977 if_printf(ifp, "watchdog timeout -- resetting\n");
979 ifp->if_flags &= ~IFF_RUNNING;
982 adapter->watchdog_timeouts++;
985 /*********************************************************************
988 * This routine is used in two ways. It is used by the stack as
989 * init entry point in network interface structure. It is also used
990 * by the driver as a hw/sw initialization routine to get to a
993 * return 0 on success, positive on failure
994 **********************************************************************/
999 struct adapter *adapter = arg;
1001 struct ifnet *ifp = &adapter->interface_data.ac_if;
1003 ASSERT_SERIALIZED(ifp->if_serializer);
1005 INIT_DEBUGOUT("em_init: begin");
1007 if (ifp->if_flags & IFF_RUNNING)
1013 * Packet Buffer Allocation (PBA)
1014 * Writing PBA sets the receive portion of the buffer
1015 * the remainder is used for the transmit buffer.
1017 * Devices before the 82547 had a Packet Buffer of 64K.
1018 * Default allocation: PBA=48K for Rx, leaving 16K for Tx.
1019 * After the 82547 the buffer was reduced to 40K.
1020 * Default allocation: PBA=30K for Rx, leaving 10K for Tx.
1021 * Note: default does not leave enough room for Jumbo Frame >10k.
1023 switch (adapter->hw.mac_type) {
1025 case em_82547_rev_2: /* 82547: Total Packet Buffer is 40K */
1026 if (adapter->hw.max_frame_size > EM_RXBUFFER_8192)
1027 pba = E1000_PBA_22K; /* 22K for Rx, 18K for Tx */
1029 pba = E1000_PBA_30K; /* 30K for Rx, 10K for Tx */
1031 adapter->tx_fifo_head = 0;
1032 adapter->tx_head_addr = pba << EM_TX_HEAD_ADDR_SHIFT;
1033 adapter->tx_fifo_size =
1034 (E1000_PBA_40K - pba) << EM_PBA_BYTES_SHIFT;
1036 /* Total Packet Buffer on these is 48K */
1039 case em_80003es2lan:
1040 pba = E1000_PBA_32K; /* 32K for Rx, 16K for Tx */
1042 case em_82573: /* 82573: Total Packet Buffer is 32K */
1043 pba = E1000_PBA_12K; /* 12K for Rx, 20K for Tx */
1049 /* Devices before 82547 had a Packet Buffer of 64K. */
1050 if(adapter->hw.max_frame_size > EM_RXBUFFER_8192)
1051 pba = E1000_PBA_40K; /* 40K for Rx, 24K for Tx */
1053 pba = E1000_PBA_48K; /* 48K for Rx, 16K for Tx */
1056 INIT_DEBUGOUT1("em_init: pba=%dK",pba);
1057 E1000_WRITE_REG(&adapter->hw, PBA, pba);
1059 /* Get the latest mac address, User can use a LAA */
1060 bcopy(adapter->interface_data.ac_enaddr, adapter->hw.mac_addr,
1063 /* Initialize the hardware */
1064 if (em_hardware_init(adapter)) {
1065 if_printf(ifp, "Unable to initialize the hardware\n");
1068 em_update_link_status(adapter);
1070 if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING)
1071 em_enable_vlans(adapter);
1073 /* Set hardware offload abilities */
1074 if (adapter->hw.mac_type >= em_82543) {
1075 if (ifp->if_capenable & IFCAP_TXCSUM)
1076 ifp->if_hwassist = EM_CHECKSUM_FEATURES;
1078 ifp->if_hwassist = 0;
1081 /* Prepare transmit descriptors and buffers */
1082 if (em_setup_transmit_structures(adapter)) {
1083 if_printf(ifp, "Could not setup transmit structures\n");
1087 em_initialize_transmit_unit(adapter);
1089 /* Setup Multicast table */
1090 em_set_multi(adapter);
1092 /* Prepare receive descriptors and buffers */
1093 if (em_setup_receive_structures(adapter)) {
1094 if_printf(ifp, "Could not setup receive structures\n");
1098 em_initialize_receive_unit(adapter);
1100 /* Don't lose promiscuous settings */
1101 em_set_promisc(adapter);
1103 ifp->if_flags |= IFF_RUNNING;
1104 ifp->if_flags &= ~IFF_OACTIVE;
1106 callout_reset(&adapter->timer, hz, em_local_timer, adapter);
1107 em_clear_hw_cntrs(&adapter->hw);
1109 #ifdef DEVICE_POLLING
1110 /* Do not enable interrupt if polling(4) is enabled */
1111 if (ifp->if_flags & IFF_POLLING)
1112 em_disable_intr(adapter);
1115 em_enable_intr(adapter);
1117 /* Don't reset the phy next time init gets called */
1118 adapter->hw.phy_reset_disable = TRUE;
1121 #ifdef DEVICE_POLLING
1124 em_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
1126 struct adapter *adapter = ifp->if_softc;
1131 ASSERT_SERIALIZED(ifp->if_serializer);
1135 em_disable_intr(adapter);
1137 case POLL_DEREGISTER:
1138 em_enable_intr(adapter);
1140 case POLL_AND_CHECK_STATUS:
1141 reg_icr = E1000_READ_REG(&adapter->hw, ICR);
1142 if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
1143 callout_stop(&adapter->timer);
1144 adapter->hw.get_link_status = 1;
1145 em_check_for_link(&adapter->hw);
1146 em_update_link_status(adapter);
1147 callout_reset(&adapter->timer, hz, em_local_timer,
1152 if (ifp->if_flags & IFF_RUNNING) {
1153 em_rxeof(adapter, count);
1156 if (!ifq_is_empty(&ifp->if_snd))
1164 #endif /* DEVICE_POLLING */
1166 /*********************************************************************
1168 * Interrupt Service routine
1170 *********************************************************************/
1176 struct adapter *adapter = arg;
1178 ifp = &adapter->interface_data.ac_if;
1181 ASSERT_SERIALIZED(ifp->if_serializer);
1183 reg_icr = E1000_READ_REG(&adapter->hw, ICR);
1184 if ((adapter->hw.mac_type >= em_82571 &&
1185 (reg_icr & E1000_ICR_INT_ASSERTED) == 0) ||
1192 * XXX: some laptops trigger several spurious interrupts on em(4)
1193 * when in the resume cycle. The ICR register reports all-ones
1194 * value in this case. Processing such interrupts would lead to
1195 * a freeze. I don't know why.
1197 if (reg_icr == 0xffffffff) {
1203 * note: do not attempt to improve efficiency by looping. This
1204 * only results in unnecessary piecemeal collection of received
1205 * packets and unnecessary piecemeal cleanups of the transmit ring.
1207 if (ifp->if_flags & IFF_RUNNING) {
1208 em_rxeof(adapter, -1);
1212 /* Link status change */
1213 if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
1214 callout_stop(&adapter->timer);
1215 adapter->hw.get_link_status = 1;
1216 em_check_for_link(&adapter->hw);
1217 em_update_link_status(adapter);
1218 callout_reset(&adapter->timer, hz, em_local_timer, adapter);
1221 if (reg_icr & E1000_ICR_RXO)
1222 adapter->rx_overruns++;
1224 if ((ifp->if_flags & IFF_RUNNING) && !ifq_is_empty(&ifp->if_snd))
1229 /*********************************************************************
1231 * Media Ioctl callback
1233 * This routine is called whenever the user queries the status of
1234 * the interface using ifconfig.
1236 **********************************************************************/
1238 em_media_status(struct ifnet *ifp, struct ifmediareq *ifmr)
1240 struct adapter *adapter = ifp->if_softc;
1241 u_char fiber_type = IFM_1000_SX;
1243 INIT_DEBUGOUT("em_media_status: begin");
1245 ASSERT_SERIALIZED(ifp->if_serializer);
1247 em_check_for_link(&adapter->hw);
1248 em_update_link_status(adapter);
1250 ifmr->ifm_status = IFM_AVALID;
1251 ifmr->ifm_active = IFM_ETHER;
1253 if (!adapter->link_active)
1256 ifmr->ifm_status |= IFM_ACTIVE;
1258 if (adapter->hw.media_type == em_media_type_fiber ||
1259 adapter->hw.media_type == em_media_type_internal_serdes) {
1260 if (adapter->hw.mac_type == em_82545)
1261 fiber_type = IFM_1000_LX;
1262 ifmr->ifm_active |= fiber_type | IFM_FDX;
1264 switch (adapter->link_speed) {
1266 ifmr->ifm_active |= IFM_10_T;
1269 ifmr->ifm_active |= IFM_100_TX;
1272 ifmr->ifm_active |= IFM_1000_T;
1275 if (adapter->link_duplex == FULL_DUPLEX)
1276 ifmr->ifm_active |= IFM_FDX;
1278 ifmr->ifm_active |= IFM_HDX;
1282 /*********************************************************************
1284 * Media Ioctl callback
1286 * This routine is called when the user changes speed/duplex using
1287 * media/mediopt option with ifconfig.
1289 **********************************************************************/
1291 em_media_change(struct ifnet *ifp)
1293 struct adapter *adapter = ifp->if_softc;
1294 struct ifmedia *ifm = &adapter->media;
1296 INIT_DEBUGOUT("em_media_change: begin");
1298 ASSERT_SERIALIZED(ifp->if_serializer);
1300 if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
1303 switch (IFM_SUBTYPE(ifm->ifm_media)) {
1305 adapter->hw.autoneg = DO_AUTO_NEG;
1306 adapter->hw.autoneg_advertised = AUTONEG_ADV_DEFAULT;
1311 adapter->hw.autoneg = DO_AUTO_NEG;
1312 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
1315 adapter->hw.autoneg = FALSE;
1316 adapter->hw.autoneg_advertised = 0;
1317 if ((ifm->ifm_media & IFM_GMASK) == IFM_FDX)
1318 adapter->hw.forced_speed_duplex = em_100_full;
1320 adapter->hw.forced_speed_duplex = em_100_half;
1323 adapter->hw.autoneg = FALSE;
1324 adapter->hw.autoneg_advertised = 0;
1325 if ((ifm->ifm_media & IFM_GMASK) == IFM_FDX)
1326 adapter->hw.forced_speed_duplex = em_10_full;
1328 adapter->hw.forced_speed_duplex = em_10_half;
1331 if_printf(ifp, "Unsupported media type\n");
1334 * As the speed/duplex settings may have changed we need to
1337 adapter->hw.phy_reset_disable = FALSE;
1339 ifp->if_flags &= ~IFF_RUNNING;
1346 em_tx_cb(void *arg, bus_dma_segment_t *seg, int nsegs, bus_size_t mapsize,
1349 struct em_q *q = arg;
1353 KASSERT(nsegs <= EM_MAX_SCATTER,
1354 ("Too many DMA segments returned when mapping tx packet"));
1356 bcopy(seg, q->segs, nsegs * sizeof(seg[0]));
1359 /*********************************************************************
1361 * This routine maps the mbufs to tx descriptors.
1363 * return 0 on success, positive on failure
1364 **********************************************************************/
1366 em_encap(struct adapter *adapter, struct mbuf *m_head)
1368 uint32_t txd_upper = 0, txd_lower = 0, txd_used = 0, txd_saved = 0;
1369 int i, j, error, last = 0;
1371 struct ifvlan *ifv = NULL;
1373 struct em_buffer *tx_buffer = NULL, *tx_buffer_first;
1375 struct em_tx_desc *current_tx_desc = NULL;
1376 struct ifnet *ifp = &adapter->interface_data.ac_if;
1379 * Force a cleanup if number of TX descriptors
1380 * available hits the threshold
1382 if (adapter->num_tx_desc_avail <= EM_TX_CLEANUP_THRESHOLD) {
1384 if (adapter->num_tx_desc_avail <= EM_TX_CLEANUP_THRESHOLD) {
1385 adapter->no_tx_desc_avail1++;
1391 * Capture the first descriptor index, this descriptor will have
1392 * the index of the EOP which is the only one that now gets a
1393 * DONE bit writeback.
1395 tx_buffer_first = &adapter->tx_buffer_area[adapter->next_avail_tx_desc];
1398 * Map the packet for DMA.
1400 map = tx_buffer_first->map;
1401 error = bus_dmamap_load_mbuf(adapter->txtag, map, m_head, em_tx_cb,
1402 &q, BUS_DMA_NOWAIT);
1404 adapter->no_tx_dma_setup++;
1407 KASSERT(q.nsegs != 0, ("em_encap: empty packet"));
1409 if (q.nsegs > (adapter->num_tx_desc_avail - 2)) {
1410 adapter->no_tx_desc_avail2++;
1415 if (ifp->if_hwassist > 0) {
1416 em_transmit_checksum_setup(adapter, m_head,
1417 &txd_upper, &txd_lower);
1420 /* Find out if we are in vlan mode */
1421 if ((m_head->m_flags & (M_PROTO1|M_PKTHDR)) == (M_PROTO1|M_PKTHDR) &&
1422 m_head->m_pkthdr.rcvif != NULL &&
1423 m_head->m_pkthdr.rcvif->if_type == IFT_L2VLAN)
1424 ifv = m_head->m_pkthdr.rcvif->if_softc;
1426 i = adapter->next_avail_tx_desc;
1427 if (adapter->pcix_82544)
1430 /* Set up our transmit descriptors */
1431 for (j = 0; j < q.nsegs; j++) {
1432 /* If adapter is 82544 and on PCIX bus */
1433 if(adapter->pcix_82544) {
1434 DESC_ARRAY desc_array;
1435 uint32_t array_elements, counter;
1438 * Check the Address and Length combination and
1439 * split the data accordingly
1441 array_elements = em_fill_descriptors(q.segs[j].ds_addr,
1442 q.segs[j].ds_len, &desc_array);
1443 for (counter = 0; counter < array_elements; counter++) {
1444 if (txd_used == adapter->num_tx_desc_avail) {
1445 adapter->next_avail_tx_desc = txd_saved;
1446 adapter->no_tx_desc_avail2++;
1450 tx_buffer = &adapter->tx_buffer_area[i];
1451 current_tx_desc = &adapter->tx_desc_base[i];
1452 current_tx_desc->buffer_addr = htole64(
1453 desc_array.descriptor[counter].address);
1454 current_tx_desc->lower.data = htole32(
1455 adapter->txd_cmd | txd_lower |
1456 (uint16_t)desc_array.descriptor[counter].length);
1457 current_tx_desc->upper.data = htole32(txd_upper);
1460 if (++i == adapter->num_tx_desc)
1463 tx_buffer->m_head = NULL;
1464 tx_buffer->next_eop = -1;
1468 tx_buffer = &adapter->tx_buffer_area[i];
1469 current_tx_desc = &adapter->tx_desc_base[i];
1471 current_tx_desc->buffer_addr = htole64(q.segs[j].ds_addr);
1472 current_tx_desc->lower.data = htole32(
1473 adapter->txd_cmd | txd_lower | q.segs[j].ds_len);
1474 current_tx_desc->upper.data = htole32(txd_upper);
1477 if (++i == adapter->num_tx_desc)
1480 tx_buffer->m_head = NULL;
1481 tx_buffer->next_eop = -1;
1485 adapter->next_avail_tx_desc = i;
1486 if (adapter->pcix_82544)
1487 adapter->num_tx_desc_avail -= txd_used;
1489 adapter->num_tx_desc_avail -= q.nsegs;
1492 /* Set the vlan id */
1493 current_tx_desc->upper.fields.special = htole16(ifv->ifv_tag);
1495 /* Tell hardware to add tag */
1496 current_tx_desc->lower.data |= htole32(E1000_TXD_CMD_VLE);
1499 tx_buffer->m_head = m_head;
1500 tx_buffer_first->map = tx_buffer->map;
1501 tx_buffer->map = map;
1502 bus_dmamap_sync(adapter->txtag, map, BUS_DMASYNC_PREWRITE);
1505 * Last Descriptor of Packet needs End Of Packet (EOP)
1506 * and Report Status (RS)
1508 current_tx_desc->lower.data |=
1509 htole32(E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS);
1512 * Keep track in the first buffer which descriptor will be
1515 tx_buffer_first->next_eop = last;
1517 bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map,
1518 BUS_DMASYNC_PREWRITE);
1521 * Advance the Transmit Descriptor Tail (Tdt), this tells the E1000
1522 * that this frame is available to transmit.
1524 if (adapter->hw.mac_type == em_82547 &&
1525 adapter->link_duplex == HALF_DUPLEX) {
1526 em_82547_move_tail_serialized(adapter);
1528 E1000_WRITE_REG(&adapter->hw, TDT, i);
1529 if (adapter->hw.mac_type == em_82547) {
1530 em_82547_update_fifo_head(adapter,
1531 m_head->m_pkthdr.len);
1537 bus_dmamap_unload(adapter->txtag, map);
1541 /*********************************************************************
1543 * 82547 workaround to avoid controller hang in half-duplex environment.
1544 * The workaround is to avoid queuing a large packet that would span
1545 * the internal Tx FIFO ring boundary. We need to reset the FIFO pointers
1546 * in this case. We do that only when FIFO is quiescent.
1548 **********************************************************************/
1550 em_82547_move_tail(void *arg)
1552 struct adapter *adapter = arg;
1553 struct ifnet *ifp = &adapter->interface_data.ac_if;
1555 lwkt_serialize_enter(ifp->if_serializer);
1556 em_82547_move_tail_serialized(adapter);
1557 lwkt_serialize_exit(ifp->if_serializer);
1561 em_82547_move_tail_serialized(struct adapter *adapter)
1565 struct em_tx_desc *tx_desc;
1566 uint16_t length = 0;
1569 hw_tdt = E1000_READ_REG(&adapter->hw, TDT);
1570 sw_tdt = adapter->next_avail_tx_desc;
1572 while (hw_tdt != sw_tdt) {
1573 tx_desc = &adapter->tx_desc_base[hw_tdt];
1574 length += tx_desc->lower.flags.length;
1575 eop = tx_desc->lower.data & E1000_TXD_CMD_EOP;
1576 if (++hw_tdt == adapter->num_tx_desc)
1580 if (em_82547_fifo_workaround(adapter, length)) {
1581 adapter->tx_fifo_wrk_cnt++;
1582 callout_reset(&adapter->tx_fifo_timer, 1,
1583 em_82547_move_tail, adapter);
1586 E1000_WRITE_REG(&adapter->hw, TDT, hw_tdt);
1587 em_82547_update_fifo_head(adapter, length);
1594 em_82547_fifo_workaround(struct adapter *adapter, int len)
1596 int fifo_space, fifo_pkt_len;
1598 fifo_pkt_len = roundup2(len + EM_FIFO_HDR, EM_FIFO_HDR);
1600 if (adapter->link_duplex == HALF_DUPLEX) {
1601 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
1603 if (fifo_pkt_len >= (EM_82547_PKT_THRESH + fifo_space)) {
1604 if (em_82547_tx_fifo_reset(adapter))
1615 em_82547_update_fifo_head(struct adapter *adapter, int len)
1617 int fifo_pkt_len = roundup2(len + EM_FIFO_HDR, EM_FIFO_HDR);
1619 /* tx_fifo_head is always 16 byte aligned */
1620 adapter->tx_fifo_head += fifo_pkt_len;
1621 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
1622 adapter->tx_fifo_head -= adapter->tx_fifo_size;
1626 em_82547_tx_fifo_reset(struct adapter *adapter)
1630 if (E1000_READ_REG(&adapter->hw, TDT) == E1000_READ_REG(&adapter->hw, TDH) &&
1631 E1000_READ_REG(&adapter->hw, TDFT) == E1000_READ_REG(&adapter->hw, TDFH) &&
1632 E1000_READ_REG(&adapter->hw, TDFTS) == E1000_READ_REG(&adapter->hw, TDFHS) &&
1633 E1000_READ_REG(&adapter->hw, TDFPC) == 0) {
1634 /* Disable TX unit */
1635 tctl = E1000_READ_REG(&adapter->hw, TCTL);
1636 E1000_WRITE_REG(&adapter->hw, TCTL, tctl & ~E1000_TCTL_EN);
1638 /* Reset FIFO pointers */
1639 E1000_WRITE_REG(&adapter->hw, TDFT, adapter->tx_head_addr);
1640 E1000_WRITE_REG(&adapter->hw, TDFH, adapter->tx_head_addr);
1641 E1000_WRITE_REG(&adapter->hw, TDFTS, adapter->tx_head_addr);
1642 E1000_WRITE_REG(&adapter->hw, TDFHS, adapter->tx_head_addr);
1644 /* Re-enable TX unit */
1645 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
1646 E1000_WRITE_FLUSH(&adapter->hw);
1648 adapter->tx_fifo_head = 0;
1649 adapter->tx_fifo_reset_cnt++;
1658 em_set_promisc(struct adapter *adapter)
1661 struct ifnet *ifp = &adapter->interface_data.ac_if;
1663 reg_rctl = E1000_READ_REG(&adapter->hw, RCTL);
1665 adapter->em_insert_vlan_header = 0;
1666 if (ifp->if_flags & IFF_PROMISC) {
1667 reg_rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
1668 E1000_WRITE_REG(&adapter->hw, RCTL, reg_rctl);
1671 * Disable VLAN stripping in promiscous mode.
1672 * This enables bridging of vlan tagged frames to occur
1673 * and also allows vlan tags to be seen in tcpdump.
1675 if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING)
1676 em_disable_vlans(adapter);
1677 adapter->em_insert_vlan_header = 1;
1678 } else if (ifp->if_flags & IFF_ALLMULTI) {
1679 reg_rctl |= E1000_RCTL_MPE;
1680 reg_rctl &= ~E1000_RCTL_UPE;
1681 E1000_WRITE_REG(&adapter->hw, RCTL, reg_rctl);
1686 em_disable_promisc(struct adapter *adapter)
1688 struct ifnet *ifp = &adapter->interface_data.ac_if;
1692 reg_rctl = E1000_READ_REG(&adapter->hw, RCTL);
1694 reg_rctl &= (~E1000_RCTL_UPE);
1695 reg_rctl &= (~E1000_RCTL_MPE);
1696 E1000_WRITE_REG(&adapter->hw, RCTL, reg_rctl);
1698 if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING)
1699 em_enable_vlans(adapter);
1700 adapter->em_insert_vlan_header = 0;
1703 /*********************************************************************
1706 * This routine is called whenever multicast address list is updated.
1708 **********************************************************************/
1711 em_set_multi(struct adapter *adapter)
1713 uint32_t reg_rctl = 0;
1714 uint8_t mta[MAX_NUM_MULTICAST_ADDRESSES * ETH_LENGTH_OF_ADDRESS];
1715 struct ifmultiaddr *ifma;
1717 struct ifnet *ifp = &adapter->interface_data.ac_if;
1719 IOCTL_DEBUGOUT("em_set_multi: begin");
1721 if (adapter->hw.mac_type == em_82542_rev2_0) {
1722 reg_rctl = E1000_READ_REG(&adapter->hw, RCTL);
1723 if (adapter->hw.pci_cmd_word & CMD_MEM_WRT_INVALIDATE)
1724 em_pci_clear_mwi(&adapter->hw);
1725 reg_rctl |= E1000_RCTL_RST;
1726 E1000_WRITE_REG(&adapter->hw, RCTL, reg_rctl);
1730 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1731 if (ifma->ifma_addr->sa_family != AF_LINK)
1734 if (mcnt == MAX_NUM_MULTICAST_ADDRESSES)
1737 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
1738 &mta[mcnt*ETH_LENGTH_OF_ADDRESS], ETH_LENGTH_OF_ADDRESS);
1742 if (mcnt >= MAX_NUM_MULTICAST_ADDRESSES) {
1743 reg_rctl = E1000_READ_REG(&adapter->hw, RCTL);
1744 reg_rctl |= E1000_RCTL_MPE;
1745 E1000_WRITE_REG(&adapter->hw, RCTL, reg_rctl);
1747 em_mc_addr_list_update(&adapter->hw, mta, mcnt, 0, 1);
1750 if (adapter->hw.mac_type == em_82542_rev2_0) {
1751 reg_rctl = E1000_READ_REG(&adapter->hw, RCTL);
1752 reg_rctl &= ~E1000_RCTL_RST;
1753 E1000_WRITE_REG(&adapter->hw, RCTL, reg_rctl);
1755 if (adapter->hw.pci_cmd_word & CMD_MEM_WRT_INVALIDATE)
1756 em_pci_set_mwi(&adapter->hw);
1760 /*********************************************************************
1763 * This routine checks for link status and updates statistics.
1765 **********************************************************************/
1768 em_local_timer(void *arg)
1771 struct adapter *adapter = arg;
1772 ifp = &adapter->interface_data.ac_if;
1774 lwkt_serialize_enter(ifp->if_serializer);
1776 em_check_for_link(&adapter->hw);
1777 em_update_link_status(adapter);
1778 em_update_stats_counters(adapter);
1779 if (em_display_debug_stats && ifp->if_flags & IFF_RUNNING)
1780 em_print_hw_stats(adapter);
1781 em_smartspeed(adapter);
1783 callout_reset(&adapter->timer, hz, em_local_timer, adapter);
1785 lwkt_serialize_exit(ifp->if_serializer);
1789 em_update_link_status(struct adapter *adapter)
1791 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU) {
1792 if (adapter->link_active == 0) {
1793 em_get_speed_and_duplex(&adapter->hw,
1794 &adapter->link_speed,
1795 &adapter->link_duplex);
1796 /* Check if we may set SPEED_MODE bit on PCI-E */
1797 if (adapter->link_speed == SPEED_1000 &&
1798 (adapter->hw.mac_type == em_82571 ||
1799 adapter->hw.mac_type == em_82572)) {
1802 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
1803 tarc0 |= SPEED_MODE_BIT;
1804 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
1807 if_printf(&adapter->interface_data.ac_if,
1808 "Link is up %d Mbps %s\n",
1809 adapter->link_speed,
1810 adapter->link_duplex == FULL_DUPLEX ?
1811 "Full Duplex" : "Half Duplex");
1813 adapter->link_active = 1;
1814 adapter->smartspeed = 0;
1816 ifp->if_baudrate = adapter->link_speed * 1000000;
1817 if_link_state_change(ifp, LINK_STATE_UP);
1821 if (adapter->link_active == 1) {
1823 ifp->if_baudrate = 0;
1825 adapter->link_speed = 0;
1826 adapter->link_duplex = 0;
1828 if_printf(&adapter->interface_data.ac_if,
1831 adapter->link_active = 0;
1833 if_link_state_change(ifp, LINK_STATE_DOWN);
1839 /*********************************************************************
1841 * This routine disables all traffic on the adapter by issuing a
1842 * global reset on the MAC and deallocates TX/RX buffers.
1844 **********************************************************************/
1850 struct adapter * adapter = arg;
1851 ifp = &adapter->interface_data.ac_if;
1853 ASSERT_SERIALIZED(ifp->if_serializer);
1855 INIT_DEBUGOUT("em_stop: begin");
1856 em_disable_intr(adapter);
1857 em_reset_hw(&adapter->hw);
1858 callout_stop(&adapter->timer);
1859 callout_stop(&adapter->tx_fifo_timer);
1860 em_free_transmit_structures(adapter);
1861 em_free_receive_structures(adapter);
1863 /* Tell the stack that the interface is no longer active */
1864 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
1868 /*********************************************************************
1870 * Determine hardware revision.
1872 **********************************************************************/
1874 em_identify_hardware(struct adapter *adapter)
1876 device_t dev = adapter->dev;
1878 /* Make sure our PCI config space has the necessary stuff set */
1879 adapter->hw.pci_cmd_word = pci_read_config(dev, PCIR_COMMAND, 2);
1880 if (!((adapter->hw.pci_cmd_word & PCIM_CMD_BUSMASTEREN) &&
1881 (adapter->hw.pci_cmd_word & PCIM_CMD_MEMEN))) {
1882 device_printf(dev, "Memory Access and/or Bus Master bits "
1884 adapter->hw.pci_cmd_word |= PCIM_CMD_BUSMASTEREN |
1886 pci_write_config(dev, PCIR_COMMAND,
1887 adapter->hw.pci_cmd_word, 2);
1890 /* Save off the information about this board */
1891 adapter->hw.vendor_id = pci_get_vendor(dev);
1892 adapter->hw.device_id = pci_get_device(dev);
1893 adapter->hw.revision_id = pci_get_revid(dev);
1894 adapter->hw.subsystem_vendor_id = pci_get_subvendor(dev);
1895 adapter->hw.subsystem_id = pci_get_subdevice(dev);
1897 /* Identify the MAC */
1898 if (em_set_mac_type(&adapter->hw))
1899 device_printf(dev, "Unknown MAC Type\n");
1901 if (adapter->hw.mac_type == em_82541 ||
1902 adapter->hw.mac_type == em_82541_rev_2 ||
1903 adapter->hw.mac_type == em_82547 ||
1904 adapter->hw.mac_type == em_82547_rev_2)
1905 adapter->hw.phy_init_script = TRUE;
1909 em_allocate_pci_resources(device_t dev)
1911 struct adapter *adapter = device_get_softc(dev);
1915 adapter->res_memory = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
1917 if (adapter->res_memory == NULL) {
1918 device_printf(dev, "Unable to allocate bus resource: memory\n");
1921 adapter->osdep.mem_bus_space_tag =
1922 rman_get_bustag(adapter->res_memory);
1923 adapter->osdep.mem_bus_space_handle =
1924 rman_get_bushandle(adapter->res_memory);
1925 adapter->hw.hw_addr = (uint8_t *)&adapter->osdep.mem_bus_space_handle;
1927 if (adapter->hw.mac_type > em_82543) {
1928 /* Figure our where our IO BAR is ? */
1929 for (rid = PCIR_BAR(0); rid < PCIR_CIS;) {
1932 val = pci_read_config(dev, rid, 4);
1933 if (EM_BAR_TYPE(val) == EM_BAR_TYPE_IO) {
1934 adapter->io_rid = rid;
1938 /* check for 64bit BAR */
1939 if (EM_BAR_MEM_TYPE(val) == EM_BAR_MEM_TYPE_64BIT)
1942 if (rid >= PCIR_CIS) {
1943 device_printf(dev, "Unable to locate IO BAR\n");
1947 adapter->res_ioport = bus_alloc_resource_any(dev,
1948 SYS_RES_IOPORT, &adapter->io_rid, RF_ACTIVE);
1949 if (!(adapter->res_ioport)) {
1950 device_printf(dev, "Unable to allocate bus resource: "
1954 adapter->hw.io_base = 0;
1955 adapter->osdep.io_bus_space_tag =
1956 rman_get_bustag(adapter->res_ioport);
1957 adapter->osdep.io_bus_space_handle =
1958 rman_get_bushandle(adapter->res_ioport);
1961 /* For ICH8 we need to find the flash memory. */
1962 if (adapter->hw.mac_type == em_ich8lan) {
1964 adapter->flash_mem = bus_alloc_resource_any(dev,
1965 SYS_RES_MEMORY, &rid, RF_ACTIVE);
1966 if (adapter->flash_mem == NULL) {
1967 device_printf(dev, "Unable to allocate bus resource: "
1971 adapter->osdep.flash_bus_space_tag =
1972 rman_get_bustag(adapter->flash_mem);
1973 adapter->osdep.flash_bus_space_handle =
1974 rman_get_bushandle(adapter->flash_mem);
1978 adapter->res_interrupt = bus_alloc_resource_any(dev, SYS_RES_IRQ,
1979 &rid, RF_SHAREABLE | RF_ACTIVE);
1980 if (adapter->res_interrupt == NULL) {
1981 device_printf(dev, "Unable to allocate bus resource: "
1986 adapter->hw.back = &adapter->osdep;
1992 em_free_pci_resources(device_t dev)
1994 struct adapter *adapter = device_get_softc(dev);
1996 if (adapter->res_interrupt != NULL) {
1997 bus_release_resource(dev, SYS_RES_IRQ, 0,
1998 adapter->res_interrupt);
2000 if (adapter->res_memory != NULL) {
2001 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_BAR(0),
2002 adapter->res_memory);
2005 if (adapter->res_ioport != NULL) {
2006 bus_release_resource(dev, SYS_RES_IOPORT, adapter->io_rid,
2007 adapter->res_ioport);
2010 if (adapter->flash_mem != NULL) {
2011 bus_release_resource(dev, SYS_RES_MEMORY, EM_FLASH,
2012 adapter->flash_mem);
2016 /*********************************************************************
2018 * Initialize the hardware to a configuration as specified by the
2019 * adapter structure. The controller is reset, the EEPROM is
2020 * verified, the MAC address is set, then the shared initialization
2021 * routines are called.
2023 **********************************************************************/
2025 em_hardware_init(struct adapter *adapter)
2027 uint16_t rx_buffer_size;
2029 INIT_DEBUGOUT("em_hardware_init: begin");
2030 /* Issue a global reset */
2031 em_reset_hw(&adapter->hw);
2033 /* When hardware is reset, fifo_head is also reset */
2034 adapter->tx_fifo_head = 0;
2036 /* Make sure we have a good EEPROM before we read from it */
2037 if (em_validate_eeprom_checksum(&adapter->hw) < 0) {
2038 device_printf(adapter->dev,
2039 "The EEPROM Checksum Is Not Valid\n");
2043 if (em_read_part_num(&adapter->hw, &(adapter->part_num)) < 0) {
2044 device_printf(adapter->dev,
2045 "EEPROM read error while reading part number\n");
2049 /* Set up smart power down as default off on newer adapters. */
2050 if (!em_smart_pwr_down &&
2051 (adapter->hw.mac_type == em_82571 ||
2052 adapter->hw.mac_type == em_82572)) {
2053 uint16_t phy_tmp = 0;
2055 /* Speed up time to link by disabling smart power down. */
2056 em_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
2058 phy_tmp &= ~IGP02E1000_PM_SPD;
2059 em_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
2064 * These parameters control the automatic generation (Tx) and
2065 * response (Rx) to Ethernet PAUSE frames.
2066 * - High water mark should allow for at least two frames to be
2067 * received after sending an XOFF.
2068 * - Low water mark works best when it is very near the high water mark.
2069 * This allows the receiver to restart by sending XON when it has
2070 * drained a bit. Here we use an arbitary value of 1500 which will
2071 * restart after one full frame is pulled from the buffer. There
2072 * could be several smaller frames in the buffer and if so they will
2073 * not trigger the XON until their total number reduces the buffer
2075 * - The pause time is fairly large at 1000 x 512ns = 512 usec.
2077 rx_buffer_size = ((E1000_READ_REG(&adapter->hw, PBA) & 0xffff) << 10);
2079 adapter->hw.fc_high_water =
2080 rx_buffer_size - roundup2(adapter->hw.max_frame_size, 1024);
2081 adapter->hw.fc_low_water = adapter->hw.fc_high_water - 1500;
2082 if (adapter->hw.mac_type == em_80003es2lan)
2083 adapter->hw.fc_pause_time = 0xFFFF;
2085 adapter->hw.fc_pause_time = 0x1000;
2086 adapter->hw.fc_send_xon = TRUE;
2087 adapter->hw.fc = E1000_FC_FULL;
2089 if (em_init_hw(&adapter->hw) < 0) {
2090 device_printf(adapter->dev, "Hardware Initialization Failed");
2094 em_check_for_link(&adapter->hw);
2099 /*********************************************************************
2101 * Setup networking device structure and register an interface.
2103 **********************************************************************/
2105 em_setup_interface(device_t dev, struct adapter *adapter)
2108 u_char fiber_type = IFM_1000_SX; /* default type */
2109 INIT_DEBUGOUT("em_setup_interface: begin");
2111 ifp = &adapter->interface_data.ac_if;
2112 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
2113 ifp->if_mtu = ETHERMTU;
2114 ifp->if_baudrate = 1000000000;
2115 ifp->if_init = em_init;
2116 ifp->if_softc = adapter;
2117 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
2118 ifp->if_ioctl = em_ioctl;
2119 ifp->if_start = em_start;
2120 #ifdef DEVICE_POLLING
2121 ifp->if_poll = em_poll;
2123 ifp->if_watchdog = em_watchdog;
2124 ifq_set_maxlen(&ifp->if_snd, adapter->num_tx_desc - 1);
2125 ifq_set_ready(&ifp->if_snd);
2127 if (adapter->hw.mac_type >= em_82543)
2128 ifp->if_capabilities |= IFCAP_HWCSUM;
2130 ifp->if_capenable = ifp->if_capabilities;
2132 ether_ifattach(ifp, adapter->hw.mac_addr, NULL);
2135 * Tell the upper layer(s) we support long frames.
2137 ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
2138 ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU;
2140 ifp->if_capenable |= IFCAP_VLAN_MTU;
2144 * Specify the media types supported by this adapter and register
2145 * callbacks to update media and link information
2147 ifmedia_init(&adapter->media, IFM_IMASK, em_media_change,
2149 if (adapter->hw.media_type == em_media_type_fiber ||
2150 adapter->hw.media_type == em_media_type_internal_serdes) {
2151 if (adapter->hw.mac_type == em_82545)
2152 fiber_type = IFM_1000_LX;
2153 ifmedia_add(&adapter->media, IFM_ETHER | fiber_type | IFM_FDX,
2155 ifmedia_add(&adapter->media, IFM_ETHER | fiber_type, 0, NULL);
2157 ifmedia_add(&adapter->media, IFM_ETHER | IFM_10_T, 0, NULL);
2158 ifmedia_add(&adapter->media, IFM_ETHER | IFM_10_T | IFM_FDX,
2160 ifmedia_add(&adapter->media, IFM_ETHER | IFM_100_TX,
2162 ifmedia_add(&adapter->media, IFM_ETHER | IFM_100_TX | IFM_FDX,
2164 ifmedia_add(&adapter->media, IFM_ETHER | IFM_1000_T | IFM_FDX,
2166 ifmedia_add(&adapter->media, IFM_ETHER | IFM_1000_T, 0, NULL);
2168 ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
2169 ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
2172 /*********************************************************************
2174 * Workaround for SmartSpeed on 82541 and 82547 controllers
2176 **********************************************************************/
2178 em_smartspeed(struct adapter *adapter)
2182 if (adapter->link_active || (adapter->hw.phy_type != em_phy_igp) ||
2183 !adapter->hw.autoneg ||
2184 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
2187 if (adapter->smartspeed == 0) {
2189 * If Master/Slave config fault is asserted twice,
2190 * we assume back-to-back.
2192 em_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_tmp);
2193 if (!(phy_tmp & SR_1000T_MS_CONFIG_FAULT))
2195 em_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_tmp);
2196 if (phy_tmp & SR_1000T_MS_CONFIG_FAULT) {
2197 em_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_tmp);
2198 if (phy_tmp & CR_1000T_MS_ENABLE) {
2199 phy_tmp &= ~CR_1000T_MS_ENABLE;
2200 em_write_phy_reg(&adapter->hw,
2201 PHY_1000T_CTRL, phy_tmp);
2202 adapter->smartspeed++;
2203 if (adapter->hw.autoneg &&
2204 !em_phy_setup_autoneg(&adapter->hw) &&
2205 !em_read_phy_reg(&adapter->hw, PHY_CTRL,
2207 phy_tmp |= (MII_CR_AUTO_NEG_EN |
2208 MII_CR_RESTART_AUTO_NEG);
2209 em_write_phy_reg(&adapter->hw,
2215 } else if (adapter->smartspeed == EM_SMARTSPEED_DOWNSHIFT) {
2216 /* If still no link, perhaps using 2/3 pair cable */
2217 em_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_tmp);
2218 phy_tmp |= CR_1000T_MS_ENABLE;
2219 em_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_tmp);
2220 if (adapter->hw.autoneg &&
2221 !em_phy_setup_autoneg(&adapter->hw) &&
2222 !em_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_tmp)) {
2223 phy_tmp |= (MII_CR_AUTO_NEG_EN |
2224 MII_CR_RESTART_AUTO_NEG);
2225 em_write_phy_reg(&adapter->hw, PHY_CTRL, phy_tmp);
2228 /* Restart process after EM_SMARTSPEED_MAX iterations */
2229 if (adapter->smartspeed++ == EM_SMARTSPEED_MAX)
2230 adapter->smartspeed = 0;
2234 * Manage DMA'able memory.
2237 em_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
2241 *(bus_addr_t *)arg = segs->ds_addr;
2245 em_dma_malloc(struct adapter *adapter, bus_size_t size,
2246 struct em_dma_alloc *dma)
2248 device_t dev = adapter->dev;
2251 error = bus_dma_tag_create(NULL, /* parent */
2252 EM_DBA_ALIGN, 0, /* alignment, bounds */
2253 BUS_SPACE_MAXADDR, /* lowaddr */
2254 BUS_SPACE_MAXADDR, /* highaddr */
2255 NULL, NULL, /* filter, filterarg */
2258 size, /* maxsegsize */
2262 device_printf(dev, "%s: bus_dma_tag_create failed; error %d\n",
2267 error = bus_dmamem_alloc(dma->dma_tag, (void**)&dma->dma_vaddr,
2268 BUS_DMA_WAITOK, &dma->dma_map);
2270 device_printf(dev, "%s: bus_dmammem_alloc failed; "
2271 "size %llu, error %d\n",
2272 __func__, (uintmax_t)size, error);
2276 error = bus_dmamap_load(dma->dma_tag, dma->dma_map,
2277 dma->dma_vaddr, size,
2278 em_dmamap_cb, &dma->dma_paddr,
2281 device_printf(dev, "%s: bus_dmamap_load failed; error %u\n",
2283 bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
2289 bus_dma_tag_destroy(dma->dma_tag);
2290 dma->dma_tag = NULL;
2295 em_dma_free(struct adapter *adapter, struct em_dma_alloc *dma)
2297 if (dma->dma_tag != NULL) {
2298 bus_dmamap_unload(dma->dma_tag, dma->dma_map);
2299 bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map);
2300 bus_dma_tag_destroy(dma->dma_tag);
2301 dma->dma_tag = NULL;
2305 /*********************************************************************
2307 * Allocate and initialize transmit structures.
2309 **********************************************************************/
2311 em_setup_transmit_structures(struct adapter *adapter)
2313 struct em_buffer *tx_buffer;
2318 * Setup DMA descriptor areas.
2320 size = roundup2(adapter->hw.max_frame_size, MCLBYTES);
2321 if (bus_dma_tag_create(NULL, /* parent */
2322 1, 0, /* alignment, bounds */
2323 BUS_SPACE_MAXADDR, /* lowaddr */
2324 BUS_SPACE_MAXADDR, /* highaddr */
2325 NULL, NULL, /* filter, filterarg */
2327 EM_MAX_SCATTER, /* nsegments */
2328 size, /* maxsegsize */
2331 device_printf(adapter->dev, "Unable to allocate TX DMA tag\n");
2335 adapter->tx_buffer_area =
2336 kmalloc(sizeof(struct em_buffer) * adapter->num_tx_desc,
2337 M_DEVBUF, M_WAITOK | M_ZERO);
2339 bzero(adapter->tx_desc_base,
2340 sizeof(struct em_tx_desc) * adapter->num_tx_desc);
2341 tx_buffer = adapter->tx_buffer_area;
2342 for (i = 0; i < adapter->num_tx_desc; i++) {
2343 error = bus_dmamap_create(adapter->txtag, 0, &tx_buffer->map);
2345 device_printf(adapter->dev,
2346 "Unable to create TX DMA map\n");
2352 adapter->next_avail_tx_desc = 0;
2353 adapter->next_tx_to_clean = 0;
2355 /* Set number of descriptors available */
2356 adapter->num_tx_desc_avail = adapter->num_tx_desc;
2358 /* Set checksum context */
2359 adapter->active_checksum_context = OFFLOAD_NONE;
2361 bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map,
2362 BUS_DMASYNC_PREWRITE);
2366 em_free_transmit_structures(adapter);
2370 /*********************************************************************
2372 * Enable transmit unit.
2374 **********************************************************************/
2376 em_initialize_transmit_unit(struct adapter *adapter)
2379 uint32_t reg_tipg = 0;
2382 INIT_DEBUGOUT("em_initialize_transmit_unit: begin");
2384 /* Setup the Base and Length of the Tx Descriptor Ring */
2385 bus_addr = adapter->txdma.dma_paddr;
2386 E1000_WRITE_REG(&adapter->hw, TDLEN,
2387 adapter->num_tx_desc * sizeof(struct em_tx_desc));
2388 E1000_WRITE_REG(&adapter->hw, TDBAH, (uint32_t)(bus_addr >> 32));
2389 E1000_WRITE_REG(&adapter->hw, TDBAL, (uint32_t)bus_addr);
2391 /* Setup the HW Tx Head and Tail descriptor pointers */
2392 E1000_WRITE_REG(&adapter->hw, TDT, 0);
2393 E1000_WRITE_REG(&adapter->hw, TDH, 0);
2395 HW_DEBUGOUT2("Base = %x, Length = %x\n",
2396 E1000_READ_REG(&adapter->hw, TDBAL),
2397 E1000_READ_REG(&adapter->hw, TDLEN));
2399 /* Set the default values for the Tx Inter Packet Gap timer */
2400 switch (adapter->hw.mac_type) {
2401 case em_82542_rev2_0:
2402 case em_82542_rev2_1:
2403 reg_tipg = DEFAULT_82542_TIPG_IPGT;
2404 reg_tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
2405 reg_tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
2407 case em_80003es2lan:
2408 reg_tipg = DEFAULT_82543_TIPG_IPGR1;
2410 DEFAULT_80003ES2LAN_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
2413 if (adapter->hw.media_type == em_media_type_fiber ||
2414 adapter->hw.media_type == em_media_type_internal_serdes)
2415 reg_tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
2417 reg_tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
2418 reg_tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT;
2419 reg_tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT;
2422 E1000_WRITE_REG(&adapter->hw, TIPG, reg_tipg);
2423 E1000_WRITE_REG(&adapter->hw, TIDV, adapter->tx_int_delay.value);
2424 if (adapter->hw.mac_type >= em_82540) {
2425 E1000_WRITE_REG(&adapter->hw, TADV,
2426 adapter->tx_abs_int_delay.value);
2429 /* Program the Transmit Control Register */
2430 reg_tctl = E1000_TCTL_PSP | E1000_TCTL_EN |
2431 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2432 if (adapter->hw.mac_type >= em_82571)
2433 reg_tctl |= E1000_TCTL_MULR;
2434 if (adapter->link_duplex == 1)
2435 reg_tctl |= E1000_FDX_COLLISION_DISTANCE << E1000_COLD_SHIFT;
2437 reg_tctl |= E1000_HDX_COLLISION_DISTANCE << E1000_COLD_SHIFT;
2439 /* This write will effectively turn on the transmit unit. */
2440 E1000_WRITE_REG(&adapter->hw, TCTL, reg_tctl);
2442 /* Setup Transmit Descriptor Base Settings */
2443 adapter->txd_cmd = E1000_TXD_CMD_IFCS;
2445 if (adapter->tx_int_delay.value > 0)
2446 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2449 /*********************************************************************
2451 * Free all transmit related data structures.
2453 **********************************************************************/
2455 em_free_transmit_structures(struct adapter *adapter)
2457 struct em_buffer *tx_buffer;
2460 INIT_DEBUGOUT("free_transmit_structures: begin");
2462 if (adapter->tx_buffer_area != NULL) {
2463 tx_buffer = adapter->tx_buffer_area;
2464 for (i = 0; i < adapter->num_tx_desc; i++, tx_buffer++) {
2465 if (tx_buffer->m_head != NULL) {
2466 bus_dmamap_unload(adapter->txtag,
2468 m_freem(tx_buffer->m_head);
2471 if (tx_buffer->map != NULL) {
2472 bus_dmamap_destroy(adapter->txtag, tx_buffer->map);
2473 tx_buffer->map = NULL;
2475 tx_buffer->m_head = NULL;
2478 if (adapter->tx_buffer_area != NULL) {
2479 kfree(adapter->tx_buffer_area, M_DEVBUF);
2480 adapter->tx_buffer_area = NULL;
2482 if (adapter->txtag != NULL) {
2483 bus_dma_tag_destroy(adapter->txtag);
2484 adapter->txtag = NULL;
2488 /*********************************************************************
2490 * The offload context needs to be set when we transfer the first
2491 * packet of a particular protocol (TCP/UDP). We change the
2492 * context only if the protocol type changes.
2494 **********************************************************************/
2496 em_transmit_checksum_setup(struct adapter *adapter,
2498 uint32_t *txd_upper,
2499 uint32_t *txd_lower)
2501 struct em_context_desc *TXD;
2502 struct em_buffer *tx_buffer;
2505 if (mp->m_pkthdr.csum_flags) {
2506 if (mp->m_pkthdr.csum_flags & CSUM_TCP) {
2507 *txd_upper = E1000_TXD_POPTS_TXSM << 8;
2508 *txd_lower = E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2509 if (adapter->active_checksum_context == OFFLOAD_TCP_IP)
2512 adapter->active_checksum_context = OFFLOAD_TCP_IP;
2513 } else if (mp->m_pkthdr.csum_flags & CSUM_UDP) {
2514 *txd_upper = E1000_TXD_POPTS_TXSM << 8;
2515 *txd_lower = E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2516 if (adapter->active_checksum_context == OFFLOAD_UDP_IP)
2519 adapter->active_checksum_context = OFFLOAD_UDP_IP;
2532 * If we reach this point, the checksum offload context
2533 * needs to be reset.
2535 curr_txd = adapter->next_avail_tx_desc;
2536 tx_buffer = &adapter->tx_buffer_area[curr_txd];
2537 TXD = (struct em_context_desc *) &adapter->tx_desc_base[curr_txd];
2539 TXD->lower_setup.ip_fields.ipcss = ETHER_HDR_LEN;
2540 TXD->lower_setup.ip_fields.ipcso =
2541 ETHER_HDR_LEN + offsetof(struct ip, ip_sum);
2542 TXD->lower_setup.ip_fields.ipcse =
2543 htole16(ETHER_HDR_LEN + sizeof(struct ip) - 1);
2545 TXD->upper_setup.tcp_fields.tucss =
2546 ETHER_HDR_LEN + sizeof(struct ip);
2547 TXD->upper_setup.tcp_fields.tucse = htole16(0);
2549 if (adapter->active_checksum_context == OFFLOAD_TCP_IP) {
2550 TXD->upper_setup.tcp_fields.tucso =
2551 ETHER_HDR_LEN + sizeof(struct ip) +
2552 offsetof(struct tcphdr, th_sum);
2553 } else if (adapter->active_checksum_context == OFFLOAD_UDP_IP) {
2554 TXD->upper_setup.tcp_fields.tucso =
2555 ETHER_HDR_LEN + sizeof(struct ip) +
2556 offsetof(struct udphdr, uh_sum);
2559 TXD->tcp_seg_setup.data = htole32(0);
2560 TXD->cmd_and_length = htole32(adapter->txd_cmd | E1000_TXD_CMD_DEXT);
2562 tx_buffer->m_head = NULL;
2563 tx_buffer->next_eop = -1;
2565 if (++curr_txd == adapter->num_tx_desc)
2568 adapter->num_tx_desc_avail--;
2569 adapter->next_avail_tx_desc = curr_txd;
2572 /**********************************************************************
2574 * Examine each tx_buffer in the used queue. If the hardware is done
2575 * processing the packet then free associated resources. The
2576 * tx_buffer is put back on the free queue.
2578 **********************************************************************/
2581 em_txeof(struct adapter *adapter)
2583 int first, last, done, num_avail;
2584 struct em_buffer *tx_buffer;
2585 struct em_tx_desc *tx_desc, *eop_desc;
2586 struct ifnet *ifp = &adapter->interface_data.ac_if;
2588 if (adapter->num_tx_desc_avail == adapter->num_tx_desc)
2591 num_avail = adapter->num_tx_desc_avail;
2592 first = adapter->next_tx_to_clean;
2593 tx_desc = &adapter->tx_desc_base[first];
2594 tx_buffer = &adapter->tx_buffer_area[first];
2595 last = tx_buffer->next_eop;
2596 KKASSERT(last >= 0 && last < adapter->num_tx_desc);
2597 eop_desc = &adapter->tx_desc_base[last];
2600 * Now caculate the terminating index for the cleanup loop below
2602 if (++last == adapter->num_tx_desc)
2606 bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map,
2607 BUS_DMASYNC_POSTREAD);
2609 while (eop_desc->upper.fields.status & E1000_TXD_STAT_DD) {
2610 while (first != done) {
2611 tx_desc->upper.data = 0;
2612 tx_desc->lower.data = 0;
2617 if (tx_buffer->m_head) {
2619 bus_dmamap_sync(adapter->txtag, tx_buffer->map,
2620 BUS_DMASYNC_POSTWRITE);
2621 bus_dmamap_unload(adapter->txtag,
2624 m_freem(tx_buffer->m_head);
2625 tx_buffer->m_head = NULL;
2627 tx_buffer->next_eop = -1;
2629 if (++first == adapter->num_tx_desc)
2632 tx_buffer = &adapter->tx_buffer_area[first];
2633 tx_desc = &adapter->tx_desc_base[first];
2635 /* See if we can continue to the next packet */
2636 last = tx_buffer->next_eop;
2638 KKASSERT(last >= 0 && last < adapter->num_tx_desc);
2639 eop_desc = &adapter->tx_desc_base[last];
2640 if (++last == adapter->num_tx_desc)
2648 bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map,
2649 BUS_DMASYNC_PREWRITE);
2651 adapter->next_tx_to_clean = first;
2654 * If we have enough room, clear IFF_OACTIVE to tell the stack
2655 * that it is OK to send packets.
2656 * If there are no pending descriptors, clear the timeout. Otherwise,
2657 * if some descriptors have been freed, restart the timeout.
2659 if (num_avail > EM_TX_CLEANUP_THRESHOLD) {
2660 ifp->if_flags &= ~IFF_OACTIVE;
2661 if (num_avail == adapter->num_tx_desc)
2663 else if (num_avail == adapter->num_tx_desc_avail)
2664 ifp->if_timer = EM_TX_TIMEOUT;
2666 adapter->num_tx_desc_avail = num_avail;
2669 /*********************************************************************
2671 * Get a buffer from system mbuf buffer pool.
2673 **********************************************************************/
2675 em_get_buf(int i, struct adapter *adapter, struct mbuf *nmp, int how)
2677 struct mbuf *mp = nmp;
2678 struct em_buffer *rx_buffer;
2683 ifp = &adapter->interface_data.ac_if;
2686 mp = m_getcl(how, MT_DATA, M_PKTHDR);
2688 adapter->mbuf_cluster_failed++;
2691 mp->m_len = mp->m_pkthdr.len = MCLBYTES;
2693 mp->m_len = mp->m_pkthdr.len = MCLBYTES;
2694 mp->m_data = mp->m_ext.ext_buf;
2698 if (ifp->if_mtu <= ETHERMTU)
2699 m_adj(mp, ETHER_ALIGN);
2701 rx_buffer = &adapter->rx_buffer_area[i];
2704 * Using memory from the mbuf cluster pool, invoke the
2705 * bus_dma machinery to arrange the memory mapping.
2707 error = bus_dmamap_load(adapter->rxtag, rx_buffer->map,
2708 mtod(mp, void *), mp->m_len,
2709 em_dmamap_cb, &paddr, 0);
2714 rx_buffer->m_head = mp;
2715 adapter->rx_desc_base[i].buffer_addr = htole64(paddr);
2716 bus_dmamap_sync(adapter->rxtag, rx_buffer->map, BUS_DMASYNC_PREREAD);
2721 /*********************************************************************
2723 * Allocate memory for rx_buffer structures. Since we use one
2724 * rx_buffer per received packet, the maximum number of rx_buffer's
2725 * that we'll need is equal to the number of receive descriptors
2726 * that we've allocated.
2728 **********************************************************************/
2730 em_allocate_receive_structures(struct adapter *adapter)
2733 struct em_buffer *rx_buffer;
2735 size = adapter->num_rx_desc * sizeof(struct em_buffer);
2736 adapter->rx_buffer_area = kmalloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
2738 error = bus_dma_tag_create(NULL, /* parent */
2739 1, 0, /* alignment, bounds */
2740 BUS_SPACE_MAXADDR, /* lowaddr */
2741 BUS_SPACE_MAXADDR, /* highaddr */
2742 NULL, NULL, /* filter, filterarg */
2743 MCLBYTES, /* maxsize */
2745 MCLBYTES, /* maxsegsize */
2749 device_printf(adapter->dev, "%s: bus_dma_tag_create failed; "
2750 "error %u\n", __func__, error);
2754 rx_buffer = adapter->rx_buffer_area;
2755 for (i = 0; i < adapter->num_rx_desc; i++, rx_buffer++) {
2756 error = bus_dmamap_create(adapter->rxtag, BUS_DMA_NOWAIT,
2759 device_printf(adapter->dev,
2760 "%s: bus_dmamap_create failed; "
2761 "error %u\n", __func__, error);
2766 for (i = 0; i < adapter->num_rx_desc; i++) {
2767 error = em_get_buf(i, adapter, NULL, MB_WAIT);
2772 bus_dmamap_sync(adapter->rxdma.dma_tag, adapter->rxdma.dma_map,
2773 BUS_DMASYNC_PREWRITE);
2777 em_free_receive_structures(adapter);
2781 /*********************************************************************
2783 * Allocate and initialize receive structures.
2785 **********************************************************************/
2787 em_setup_receive_structures(struct adapter *adapter)
2791 bzero(adapter->rx_desc_base,
2792 sizeof(struct em_rx_desc) * adapter->num_rx_desc);
2794 error = em_allocate_receive_structures(adapter);
2798 /* Setup our descriptor pointers */
2799 adapter->next_rx_desc_to_check = 0;
2804 /*********************************************************************
2806 * Enable receive unit.
2808 **********************************************************************/
2810 em_initialize_receive_unit(struct adapter *adapter)
2813 uint32_t reg_rxcsum;
2817 INIT_DEBUGOUT("em_initialize_receive_unit: begin");
2819 ifp = &adapter->interface_data.ac_if;
2822 * Make sure receives are disabled while setting
2823 * up the descriptor ring
2825 E1000_WRITE_REG(&adapter->hw, RCTL, 0);
2827 /* Set the Receive Delay Timer Register */
2828 E1000_WRITE_REG(&adapter->hw, RDTR,
2829 adapter->rx_int_delay.value | E1000_RDT_FPDB);
2831 if(adapter->hw.mac_type >= em_82540) {
2832 E1000_WRITE_REG(&adapter->hw, RADV,
2833 adapter->rx_abs_int_delay.value);
2835 /* Set the interrupt throttling rate in 256ns increments */
2836 if (em_int_throttle_ceil) {
2837 E1000_WRITE_REG(&adapter->hw, ITR,
2838 1000000000 / 256 / em_int_throttle_ceil);
2840 E1000_WRITE_REG(&adapter->hw, ITR, 0);
2844 /* Setup the Base and Length of the Rx Descriptor Ring */
2845 bus_addr = adapter->rxdma.dma_paddr;
2846 E1000_WRITE_REG(&adapter->hw, RDLEN, adapter->num_rx_desc *
2847 sizeof(struct em_rx_desc));
2848 E1000_WRITE_REG(&adapter->hw, RDBAH, (uint32_t)(bus_addr >> 32));
2849 E1000_WRITE_REG(&adapter->hw, RDBAL, (uint32_t)bus_addr);
2851 /* Setup the Receive Control Register */
2852 reg_rctl = E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
2853 E1000_RCTL_RDMTS_HALF |
2854 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
2856 if (adapter->hw.tbi_compatibility_on == TRUE)
2857 reg_rctl |= E1000_RCTL_SBP;
2859 switch (adapter->rx_buffer_len) {
2861 case EM_RXBUFFER_2048:
2862 reg_rctl |= E1000_RCTL_SZ_2048;
2864 case EM_RXBUFFER_4096:
2865 reg_rctl |= E1000_RCTL_SZ_4096 | E1000_RCTL_BSEX |
2868 case EM_RXBUFFER_8192:
2869 reg_rctl |= E1000_RCTL_SZ_8192 | E1000_RCTL_BSEX |
2872 case EM_RXBUFFER_16384:
2873 reg_rctl |= E1000_RCTL_SZ_16384 | E1000_RCTL_BSEX |
2878 if (ifp->if_mtu > ETHERMTU)
2879 reg_rctl |= E1000_RCTL_LPE;
2881 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2882 if ((adapter->hw.mac_type >= em_82543) &&
2883 (ifp->if_capenable & IFCAP_RXCSUM)) {
2884 reg_rxcsum = E1000_READ_REG(&adapter->hw, RXCSUM);
2885 reg_rxcsum |= (E1000_RXCSUM_IPOFL | E1000_RXCSUM_TUOFL);
2886 E1000_WRITE_REG(&adapter->hw, RXCSUM, reg_rxcsum);
2889 #ifdef EM_X60_WORKAROUND
2890 if (adapter->hw.mac_type == em_82573)
2891 E1000_WRITE_REG(&adapter->hw, RDTR, 32);
2894 /* Enable Receives */
2895 E1000_WRITE_REG(&adapter->hw, RCTL, reg_rctl);
2897 /* Setup the HW Rx Head and Tail Descriptor Pointers */
2898 E1000_WRITE_REG(&adapter->hw, RDH, 0);
2899 E1000_WRITE_REG(&adapter->hw, RDT, adapter->num_rx_desc - 1);
2902 /*********************************************************************
2904 * Free receive related data structures.
2906 **********************************************************************/
2908 em_free_receive_structures(struct adapter *adapter)
2910 struct em_buffer *rx_buffer;
2913 INIT_DEBUGOUT("free_receive_structures: begin");
2915 if (adapter->rx_buffer_area != NULL) {
2916 rx_buffer = adapter->rx_buffer_area;
2917 for (i = 0; i < adapter->num_rx_desc; i++, rx_buffer++) {
2918 if (rx_buffer->m_head != NULL) {
2919 bus_dmamap_unload(adapter->rxtag,
2921 m_freem(rx_buffer->m_head);
2922 rx_buffer->m_head = NULL;
2924 if (rx_buffer->map != NULL) {
2925 bus_dmamap_destroy(adapter->rxtag,
2927 rx_buffer->map = NULL;
2931 if (adapter->rx_buffer_area != NULL) {
2932 kfree(adapter->rx_buffer_area, M_DEVBUF);
2933 adapter->rx_buffer_area = NULL;
2935 if (adapter->rxtag != NULL) {
2936 bus_dma_tag_destroy(adapter->rxtag);
2937 adapter->rxtag = NULL;
2941 /*********************************************************************
2943 * This routine executes in interrupt context. It replenishes
2944 * the mbufs in the descriptor and sends data which has been
2945 * dma'ed into host memory to upper layer.
2947 * We loop at most count times if count is > 0, or until done if
2950 *********************************************************************/
2952 em_rxeof(struct adapter *adapter, int count)
2956 uint8_t accept_frame = 0;
2958 uint16_t len, desc_len, prev_len_adj;
2961 /* Pointer to the receive descriptor being examined. */
2962 struct em_rx_desc *current_desc;
2964 ifp = &adapter->interface_data.ac_if;
2965 i = adapter->next_rx_desc_to_check;
2966 current_desc = &adapter->rx_desc_base[i];
2968 bus_dmamap_sync(adapter->rxdma.dma_tag, adapter->rxdma.dma_map,
2969 BUS_DMASYNC_POSTREAD);
2971 if (!(current_desc->status & E1000_RXD_STAT_DD))
2974 while ((current_desc->status & E1000_RXD_STAT_DD) && count != 0) {
2976 mp = adapter->rx_buffer_area[i].m_head;
2977 bus_dmamap_sync(adapter->rxtag, adapter->rx_buffer_area[i].map,
2978 BUS_DMASYNC_POSTREAD);
2979 bus_dmamap_unload(adapter->rxtag,
2980 adapter->rx_buffer_area[i].map);
2984 desc_len = le16toh(current_desc->length);
2985 if (current_desc->status & E1000_RXD_STAT_EOP) {
2988 if (desc_len < ETHER_CRC_LEN) {
2990 prev_len_adj = ETHER_CRC_LEN - desc_len;
2992 len = desc_len - ETHER_CRC_LEN;
2999 if (current_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
3001 uint32_t pkt_len = desc_len;
3003 if (adapter->fmp != NULL)
3004 pkt_len += adapter->fmp->m_pkthdr.len;
3006 last_byte = *(mtod(mp, caddr_t) + desc_len - 1);
3008 if (TBI_ACCEPT(&adapter->hw, current_desc->status,
3009 current_desc->errors,
3010 pkt_len, last_byte)) {
3011 em_tbi_adjust_stats(&adapter->hw,
3014 adapter->hw.mac_addr);
3023 if (em_get_buf(i, adapter, NULL, MB_DONTWAIT) == ENOBUFS) {
3024 adapter->dropped_pkts++;
3025 em_get_buf(i, adapter, mp, MB_DONTWAIT);
3026 if (adapter->fmp != NULL)
3027 m_freem(adapter->fmp);
3028 adapter->fmp = NULL;
3029 adapter->lmp = NULL;
3033 /* Assign correct length to the current fragment */
3036 if (adapter->fmp == NULL) {
3037 mp->m_pkthdr.len = len;
3038 adapter->fmp = mp; /* Store the first mbuf */
3041 /* Chain mbuf's together */
3043 * Adjust length of previous mbuf in chain if
3044 * we received less than 4 bytes in the last
3047 if (prev_len_adj > 0) {
3048 adapter->lmp->m_len -= prev_len_adj;
3049 adapter->fmp->m_pkthdr.len -= prev_len_adj;
3051 adapter->lmp->m_next = mp;
3052 adapter->lmp = adapter->lmp->m_next;
3053 adapter->fmp->m_pkthdr.len += len;
3057 adapter->fmp->m_pkthdr.rcvif = ifp;
3060 em_receive_checksum(adapter, current_desc,
3062 if (current_desc->status & E1000_RXD_STAT_VP) {
3063 VLAN_INPUT_TAG(adapter->fmp,
3064 (current_desc->special &
3065 E1000_RXD_SPC_VLAN_MASK));
3067 ifp->if_input(ifp, adapter->fmp);
3069 adapter->fmp = NULL;
3070 adapter->lmp = NULL;
3073 adapter->dropped_pkts++;
3074 em_get_buf(i, adapter, mp, MB_DONTWAIT);
3075 if (adapter->fmp != NULL)
3076 m_freem(adapter->fmp);
3077 adapter->fmp = NULL;
3078 adapter->lmp = NULL;
3082 /* Zero out the receive descriptors status. */
3083 current_desc->status = 0;
3085 /* Advance our pointers to the next descriptor. */
3086 if (++i == adapter->num_rx_desc) {
3088 current_desc = adapter->rx_desc_base;
3094 bus_dmamap_sync(adapter->rxdma.dma_tag, adapter->rxdma.dma_map,
3095 BUS_DMASYNC_PREWRITE);
3097 adapter->next_rx_desc_to_check = i;
3099 /* Advance the E1000's Receive Queue #0 "Tail Pointer". */
3101 i = adapter->num_rx_desc - 1;
3103 E1000_WRITE_REG(&adapter->hw, RDT, i);
3106 /*********************************************************************
3108 * Verify that the hardware indicated that the checksum is valid.
3109 * Inform the stack about the status of checksum so that stack
3110 * doesn't spend time verifying the checksum.
3112 *********************************************************************/
3114 em_receive_checksum(struct adapter *adapter,
3115 struct em_rx_desc *rx_desc,
3118 /* 82543 or newer only */
3119 if ((adapter->hw.mac_type < em_82543) ||
3120 /* Ignore Checksum bit is set */
3121 (rx_desc->status & E1000_RXD_STAT_IXSM)) {
3122 mp->m_pkthdr.csum_flags = 0;
3126 if (rx_desc->status & E1000_RXD_STAT_IPCS) {
3128 if (!(rx_desc->errors & E1000_RXD_ERR_IPE)) {
3129 /* IP Checksum Good */
3130 mp->m_pkthdr.csum_flags = CSUM_IP_CHECKED;
3131 mp->m_pkthdr.csum_flags |= CSUM_IP_VALID;
3133 mp->m_pkthdr.csum_flags = 0;
3137 if (rx_desc->status & E1000_RXD_STAT_TCPCS) {
3139 if (!(rx_desc->errors & E1000_RXD_ERR_TCPE)) {
3140 mp->m_pkthdr.csum_flags |=
3141 (CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
3142 mp->m_pkthdr.csum_data = htons(0xffff);
3149 em_enable_vlans(struct adapter *adapter)
3153 E1000_WRITE_REG(&adapter->hw, VET, ETHERTYPE_VLAN);
3155 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
3156 ctrl |= E1000_CTRL_VME;
3157 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
3161 em_disable_vlans(struct adapter *adapter)
3165 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
3166 ctrl &= ~E1000_CTRL_VME;
3167 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
3171 * note: we must call bus_enable_intr() prior to enabling the hardware
3172 * interrupt and bus_disable_intr() after disabling the hardware interrupt
3173 * in order to avoid handler execution races from scheduled interrupt
3177 em_enable_intr(struct adapter *adapter)
3179 struct ifnet *ifp = &adapter->interface_data.ac_if;
3181 if ((ifp->if_flags & IFF_POLLING) == 0) {
3182 lwkt_serialize_handler_enable(ifp->if_serializer);
3183 E1000_WRITE_REG(&adapter->hw, IMS, (IMS_ENABLE_MASK));
3188 em_disable_intr(struct adapter *adapter)
3191 * The first version of 82542 had an errata where when link was forced
3192 * it would stay up even up even if the cable was disconnected.
3193 * Sequence errors were used to detect the disconnect and then the
3194 * driver would unforce the link. This code in the in the ISR. For
3195 * this to work correctly the Sequence error interrupt had to be
3196 * enabled all the time.
3198 if (adapter->hw.mac_type == em_82542_rev2_0) {
3199 E1000_WRITE_REG(&adapter->hw, IMC,
3200 (0xffffffff & ~E1000_IMC_RXSEQ));
3202 E1000_WRITE_REG(&adapter->hw, IMC, 0xffffffff);
3205 lwkt_serialize_handler_disable(adapter->interface_data.ac_if.if_serializer);
3209 em_is_valid_ether_addr(uint8_t *addr)
3211 static const char zero_addr[6] = { 0, 0, 0, 0, 0, 0 };
3213 if ((addr[0] & 1) || !bcmp(addr, zero_addr, ETHER_ADDR_LEN))
3220 em_write_pci_cfg(struct em_hw *hw, uint32_t reg, uint16_t *value)
3222 pci_write_config(((struct em_osdep *)hw->back)->dev, reg, *value, 2);
3226 em_read_pci_cfg(struct em_hw *hw, uint32_t reg, uint16_t *value)
3228 *value = pci_read_config(((struct em_osdep *)hw->back)->dev, reg, 2);
3232 em_pci_set_mwi(struct em_hw *hw)
3234 pci_write_config(((struct em_osdep *)hw->back)->dev, PCIR_COMMAND,
3235 (hw->pci_cmd_word | CMD_MEM_WRT_INVALIDATE), 2);
3239 em_pci_clear_mwi(struct em_hw *hw)
3241 pci_write_config(((struct em_osdep *)hw->back)->dev, PCIR_COMMAND,
3242 (hw->pci_cmd_word & ~CMD_MEM_WRT_INVALIDATE), 2);
3246 em_io_read(struct em_hw *hw, unsigned long port)
3248 struct em_osdep *io = hw->back;
3250 return bus_space_read_4(io->io_bus_space_tag,
3251 io->io_bus_space_handle, port);
3255 em_io_write(struct em_hw *hw, unsigned long port, uint32_t value)
3257 struct em_osdep *io = hw->back;
3259 bus_space_write_4(io->io_bus_space_tag,
3260 io->io_bus_space_handle, port, value);
3264 * We may eventually really do this, but its unnecessary
3265 * for now so we just return unsupported.
3268 em_read_pcie_cap_reg(struct em_hw *hw, uint32_t reg, uint16_t *value)
3274 /*********************************************************************
3275 * 82544 Coexistence issue workaround.
3276 * There are 2 issues.
3277 * 1. Transmit Hang issue.
3278 * To detect this issue, following equation can be used...
3279 * SIZE[3:0] + ADDR[2:0] = SUM[3:0].
3280 * If SUM[3:0] is in between 1 to 4, we will have this issue.
3283 * To detect this issue, following equation can be used...
3284 * SIZE[3:0] + ADDR[2:0] = SUM[3:0].
3285 * If SUM[3:0] is in between 9 to c, we will have this issue.
3289 * Make sure we do not have ending address as 1,2,3,4(Hang) or
3292 *************************************************************************/
3294 em_fill_descriptors(bus_addr_t address, uint32_t length, PDESC_ARRAY desc_array)
3296 /* Since issue is sensitive to length and address.*/
3297 /* Let us first check the address...*/
3298 uint32_t safe_terminator;
3300 desc_array->descriptor[0].address = address;
3301 desc_array->descriptor[0].length = length;
3302 desc_array->elements = 1;
3303 return (desc_array->elements);
3305 safe_terminator = (uint32_t)((((uint32_t)address & 0x7) + (length & 0xF)) & 0xF);
3306 /* if it does not fall between 0x1 to 0x4 and 0x9 to 0xC then return */
3307 if (safe_terminator == 0 ||
3308 (safe_terminator > 4 && safe_terminator < 9) ||
3309 (safe_terminator > 0xC && safe_terminator <= 0xF)) {
3310 desc_array->descriptor[0].address = address;
3311 desc_array->descriptor[0].length = length;
3312 desc_array->elements = 1;
3313 return (desc_array->elements);
3316 desc_array->descriptor[0].address = address;
3317 desc_array->descriptor[0].length = length - 4;
3318 desc_array->descriptor[1].address = address + (length - 4);
3319 desc_array->descriptor[1].length = 4;
3320 desc_array->elements = 2;
3321 return (desc_array->elements);
3324 /**********************************************************************
3326 * Update the board statistics counters.
3328 **********************************************************************/
3330 em_update_stats_counters(struct adapter *adapter)
3334 if (adapter->hw.media_type == em_media_type_copper ||
3335 (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU)) {
3336 adapter->stats.symerrs += E1000_READ_REG(&adapter->hw, SYMERRS);
3337 adapter->stats.sec += E1000_READ_REG(&adapter->hw, SEC);
3339 adapter->stats.crcerrs += E1000_READ_REG(&adapter->hw, CRCERRS);
3340 adapter->stats.mpc += E1000_READ_REG(&adapter->hw, MPC);
3341 adapter->stats.scc += E1000_READ_REG(&adapter->hw, SCC);
3342 adapter->stats.ecol += E1000_READ_REG(&adapter->hw, ECOL);
3344 adapter->stats.mcc += E1000_READ_REG(&adapter->hw, MCC);
3345 adapter->stats.latecol += E1000_READ_REG(&adapter->hw, LATECOL);
3346 adapter->stats.colc += E1000_READ_REG(&adapter->hw, COLC);
3347 adapter->stats.dc += E1000_READ_REG(&adapter->hw, DC);
3348 adapter->stats.rlec += E1000_READ_REG(&adapter->hw, RLEC);
3349 adapter->stats.xonrxc += E1000_READ_REG(&adapter->hw, XONRXC);
3350 adapter->stats.xontxc += E1000_READ_REG(&adapter->hw, XONTXC);
3351 adapter->stats.xoffrxc += E1000_READ_REG(&adapter->hw, XOFFRXC);
3352 adapter->stats.xofftxc += E1000_READ_REG(&adapter->hw, XOFFTXC);
3353 adapter->stats.fcruc += E1000_READ_REG(&adapter->hw, FCRUC);
3354 adapter->stats.prc64 += E1000_READ_REG(&adapter->hw, PRC64);
3355 adapter->stats.prc127 += E1000_READ_REG(&adapter->hw, PRC127);
3356 adapter->stats.prc255 += E1000_READ_REG(&adapter->hw, PRC255);
3357 adapter->stats.prc511 += E1000_READ_REG(&adapter->hw, PRC511);
3358 adapter->stats.prc1023 += E1000_READ_REG(&adapter->hw, PRC1023);
3359 adapter->stats.prc1522 += E1000_READ_REG(&adapter->hw, PRC1522);
3360 adapter->stats.gprc += E1000_READ_REG(&adapter->hw, GPRC);
3361 adapter->stats.bprc += E1000_READ_REG(&adapter->hw, BPRC);
3362 adapter->stats.mprc += E1000_READ_REG(&adapter->hw, MPRC);
3363 adapter->stats.gptc += E1000_READ_REG(&adapter->hw, GPTC);
3365 /* For the 64-bit byte counters the low dword must be read first. */
3366 /* Both registers clear on the read of the high dword */
3368 adapter->stats.gorcl += E1000_READ_REG(&adapter->hw, GORCL);
3369 adapter->stats.gorch += E1000_READ_REG(&adapter->hw, GORCH);
3370 adapter->stats.gotcl += E1000_READ_REG(&adapter->hw, GOTCL);
3371 adapter->stats.gotch += E1000_READ_REG(&adapter->hw, GOTCH);
3373 adapter->stats.rnbc += E1000_READ_REG(&adapter->hw, RNBC);
3374 adapter->stats.ruc += E1000_READ_REG(&adapter->hw, RUC);
3375 adapter->stats.rfc += E1000_READ_REG(&adapter->hw, RFC);
3376 adapter->stats.roc += E1000_READ_REG(&adapter->hw, ROC);
3377 adapter->stats.rjc += E1000_READ_REG(&adapter->hw, RJC);
3379 adapter->stats.torl += E1000_READ_REG(&adapter->hw, TORL);
3380 adapter->stats.torh += E1000_READ_REG(&adapter->hw, TORH);
3381 adapter->stats.totl += E1000_READ_REG(&adapter->hw, TOTL);
3382 adapter->stats.toth += E1000_READ_REG(&adapter->hw, TOTH);
3384 adapter->stats.tpr += E1000_READ_REG(&adapter->hw, TPR);
3385 adapter->stats.tpt += E1000_READ_REG(&adapter->hw, TPT);
3386 adapter->stats.ptc64 += E1000_READ_REG(&adapter->hw, PTC64);
3387 adapter->stats.ptc127 += E1000_READ_REG(&adapter->hw, PTC127);
3388 adapter->stats.ptc255 += E1000_READ_REG(&adapter->hw, PTC255);
3389 adapter->stats.ptc511 += E1000_READ_REG(&adapter->hw, PTC511);
3390 adapter->stats.ptc1023 += E1000_READ_REG(&adapter->hw, PTC1023);
3391 adapter->stats.ptc1522 += E1000_READ_REG(&adapter->hw, PTC1522);
3392 adapter->stats.mptc += E1000_READ_REG(&adapter->hw, MPTC);
3393 adapter->stats.bptc += E1000_READ_REG(&adapter->hw, BPTC);
3395 if (adapter->hw.mac_type >= em_82543) {
3396 adapter->stats.algnerrc +=
3397 E1000_READ_REG(&adapter->hw, ALGNERRC);
3398 adapter->stats.rxerrc +=
3399 E1000_READ_REG(&adapter->hw, RXERRC);
3400 adapter->stats.tncrs +=
3401 E1000_READ_REG(&adapter->hw, TNCRS);
3402 adapter->stats.cexterr +=
3403 E1000_READ_REG(&adapter->hw, CEXTERR);
3404 adapter->stats.tsctc +=
3405 E1000_READ_REG(&adapter->hw, TSCTC);
3406 adapter->stats.tsctfc +=
3407 E1000_READ_REG(&adapter->hw, TSCTFC);
3409 ifp = &adapter->interface_data.ac_if;
3411 /* Fill out the OS statistics structure */
3412 ifp->if_collisions = adapter->stats.colc;
3416 adapter->dropped_pkts +
3417 adapter->stats.rxerrc +
3418 adapter->stats.crcerrs +
3419 adapter->stats.algnerrc +
3420 adapter->stats.ruc + adapter->stats.roc +
3421 adapter->stats.mpc + adapter->stats.cexterr +
3422 adapter->rx_overruns;
3425 ifp->if_oerrors = adapter->stats.ecol + adapter->stats.latecol +
3426 adapter->watchdog_timeouts;
3430 /**********************************************************************
3432 * This routine is called only when em_display_debug_stats is enabled.
3433 * This routine provides a way to take a look at important statistics
3434 * maintained by the driver and hardware.
3436 **********************************************************************/
3438 em_print_debug_info(struct adapter *adapter)
3440 device_t dev= adapter->dev;
3441 uint8_t *hw_addr = adapter->hw.hw_addr;
3443 device_printf(dev, "Adapter hardware address = %p \n", hw_addr);
3444 device_printf(dev, "CTRL = 0x%x RCTL = 0x%x\n",
3445 E1000_READ_REG(&adapter->hw, CTRL),
3446 E1000_READ_REG(&adapter->hw, RCTL));
3447 device_printf(dev, "Packet buffer = Tx=%dk Rx=%dk\n",
3448 ((E1000_READ_REG(&adapter->hw, PBA) & 0xffff0000) >> 16),
3449 (E1000_READ_REG(&adapter->hw, PBA) & 0xffff));
3450 device_printf(dev, "Flow control watermarks high = %d low = %d\n",
3451 adapter->hw.fc_high_water, adapter->hw.fc_low_water);
3452 device_printf(dev, "tx_int_delay = %d, tx_abs_int_delay = %d\n",
3453 E1000_READ_REG(&adapter->hw, TIDV),
3454 E1000_READ_REG(&adapter->hw, TADV));
3455 device_printf(dev, "rx_int_delay = %d, rx_abs_int_delay = %d\n",
3456 E1000_READ_REG(&adapter->hw, RDTR),
3457 E1000_READ_REG(&adapter->hw, RADV));
3458 device_printf(dev, "fifo workaround = %lld, fifo_reset_count = %lld\n",
3459 (long long)adapter->tx_fifo_wrk_cnt,
3460 (long long)adapter->tx_fifo_reset_cnt);
3461 device_printf(dev, "hw tdh = %d, hw tdt = %d\n",
3462 E1000_READ_REG(&adapter->hw, TDH),
3463 E1000_READ_REG(&adapter->hw, TDT));
3464 device_printf(dev, "Num Tx descriptors avail = %d\n",
3465 adapter->num_tx_desc_avail);
3466 device_printf(dev, "Tx Descriptors not avail1 = %ld\n",
3467 adapter->no_tx_desc_avail1);
3468 device_printf(dev, "Tx Descriptors not avail2 = %ld\n",
3469 adapter->no_tx_desc_avail2);
3470 device_printf(dev, "Std mbuf failed = %ld\n",
3471 adapter->mbuf_alloc_failed);
3472 device_printf(dev, "Std mbuf cluster failed = %ld\n",
3473 adapter->mbuf_cluster_failed);
3474 device_printf(dev, "Driver dropped packets = %ld\n",
3475 adapter->dropped_pkts);
3479 em_print_hw_stats(struct adapter *adapter)
3481 device_t dev= adapter->dev;
3483 device_printf(dev, "Excessive collisions = %lld\n",
3484 (long long)adapter->stats.ecol);
3485 device_printf(dev, "Symbol errors = %lld\n",
3486 (long long)adapter->stats.symerrs);
3487 device_printf(dev, "Sequence errors = %lld\n",
3488 (long long)adapter->stats.sec);
3489 device_printf(dev, "Defer count = %lld\n",
3490 (long long)adapter->stats.dc);
3492 device_printf(dev, "Missed Packets = %lld\n",
3493 (long long)adapter->stats.mpc);
3494 device_printf(dev, "Receive No Buffers = %lld\n",
3495 (long long)adapter->stats.rnbc);
3496 /* RLEC is inaccurate on some hardware, calculate our own. */
3497 device_printf(dev, "Receive Length errors = %lld\n",
3498 (long long)adapter->stats.roc +
3499 (long long)adapter->stats.ruc);
3500 device_printf(dev, "Receive errors = %lld\n",
3501 (long long)adapter->stats.rxerrc);
3502 device_printf(dev, "Crc errors = %lld\n",
3503 (long long)adapter->stats.crcerrs);
3504 device_printf(dev, "Alignment errors = %lld\n",
3505 (long long)adapter->stats.algnerrc);
3506 device_printf(dev, "Carrier extension errors = %lld\n",
3507 (long long)adapter->stats.cexterr);
3508 device_printf(dev, "RX overruns = %lu\n", adapter->rx_overruns);
3509 device_printf(dev, "Watchdog timeouts = %lu\n",
3510 adapter->watchdog_timeouts);
3512 device_printf(dev, "XON Rcvd = %lld\n",
3513 (long long)adapter->stats.xonrxc);
3514 device_printf(dev, "XON Xmtd = %lld\n",
3515 (long long)adapter->stats.xontxc);
3516 device_printf(dev, "XOFF Rcvd = %lld\n",
3517 (long long)adapter->stats.xoffrxc);
3518 device_printf(dev, "XOFF Xmtd = %lld\n",
3519 (long long)adapter->stats.xofftxc);
3521 device_printf(dev, "Good Packets Rcvd = %lld\n",
3522 (long long)adapter->stats.gprc);
3523 device_printf(dev, "Good Packets Xmtd = %lld\n",
3524 (long long)adapter->stats.gptc);
3528 em_sysctl_debug_info(SYSCTL_HANDLER_ARGS)
3532 struct adapter *adapter;
3535 error = sysctl_handle_int(oidp, &result, 0, req);
3537 if (error || !req->newptr)
3541 adapter = (struct adapter *)arg1;
3542 em_print_debug_info(adapter);
3549 em_sysctl_stats(SYSCTL_HANDLER_ARGS)
3553 struct adapter *adapter;
3556 error = sysctl_handle_int(oidp, &result, 0, req);
3558 if (error || !req->newptr)
3562 adapter = (struct adapter *)arg1;
3563 em_print_hw_stats(adapter);
3570 em_sysctl_int_delay(SYSCTL_HANDLER_ARGS)
3572 struct em_int_delay_info *info;
3573 struct adapter *adapter;
3579 info = (struct em_int_delay_info *)arg1;
3580 adapter = info->adapter;
3581 usecs = info->value;
3582 error = sysctl_handle_int(oidp, &usecs, 0, req);
3583 if (error != 0 || req->newptr == NULL)
3585 if (usecs < 0 || usecs > E1000_TICKS_TO_USECS(65535))
3587 info->value = usecs;
3588 ticks = E1000_USECS_TO_TICKS(usecs);
3590 lwkt_serialize_enter(adapter->interface_data.ac_if.if_serializer);
3591 regval = E1000_READ_OFFSET(&adapter->hw, info->offset);
3592 regval = (regval & ~0xffff) | (ticks & 0xffff);
3593 /* Handle a few special cases. */
3594 switch (info->offset) {
3596 case E1000_82542_RDTR:
3597 regval |= E1000_RDT_FPDB;
3600 case E1000_82542_TIDV:
3602 adapter->txd_cmd &= ~E1000_TXD_CMD_IDE;
3603 /* Don't write 0 into the TIDV register. */
3606 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
3609 E1000_WRITE_OFFSET(&adapter->hw, info->offset, regval);
3610 lwkt_serialize_exit(adapter->interface_data.ac_if.if_serializer);
3615 em_add_int_delay_sysctl(struct adapter *adapter, const char *name,
3616 const char *description, struct em_int_delay_info *info,
3617 int offset, int value)
3619 info->adapter = adapter;
3620 info->offset = offset;
3621 info->value = value;
3622 SYSCTL_ADD_PROC(&adapter->sysctl_ctx,
3623 SYSCTL_CHILDREN(adapter->sysctl_tree),
3624 OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW,
3625 info, 0, em_sysctl_int_delay, "I", description);
3629 em_sysctl_int_throttle(SYSCTL_HANDLER_ARGS)
3631 struct adapter *adapter = (void *)arg1;
3635 throttle = em_int_throttle_ceil;
3636 error = sysctl_handle_int(oidp, &throttle, 0, req);
3637 if (error || req->newptr == NULL)
3639 if (throttle < 0 || throttle > 1000000000 / 256)
3643 * Set the interrupt throttling rate in 256ns increments,
3644 * recalculate sysctl value assignment to get exact frequency.
3646 throttle = 1000000000 / 256 / throttle;
3647 lwkt_serialize_enter(adapter->interface_data.ac_if.if_serializer);
3648 em_int_throttle_ceil = 1000000000 / 256 / throttle;
3649 E1000_WRITE_REG(&adapter->hw, ITR, throttle);
3650 lwkt_serialize_exit(adapter->interface_data.ac_if.if_serializer);
3652 lwkt_serialize_enter(adapter->interface_data.ac_if.if_serializer);
3653 em_int_throttle_ceil = 0;
3654 E1000_WRITE_REG(&adapter->hw, ITR, 0);
3655 lwkt_serialize_exit(adapter->interface_data.ac_if.if_serializer);
3657 device_printf(adapter->dev, "Interrupt moderation set to %d/sec\n",
3658 em_int_throttle_ceil);