1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
36 char e1000_driver_name[] = "e1000";
37 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
38 #define DRV_VERSION "7.3.21-k8-NAPI"
39 const char e1000_driver_version[] = DRV_VERSION;
40 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42 /* e1000_pci_tbl - PCI Device ID Table
44 * Last entry must be all 0s
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 static const struct pci_device_id e1000_pci_tbl[] = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
93 int e1000_up(struct e1000_adapter *adapter);
94 void e1000_down(struct e1000_adapter *adapter);
95 void e1000_reinit_locked(struct e1000_adapter *adapter);
96 void e1000_reset(struct e1000_adapter *adapter);
97 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
98 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
99 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
100 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
101 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *txdr);
103 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rxdr);
105 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *tx_ring);
107 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rx_ring);
109 void e1000_update_stats(struct e1000_adapter *adapter);
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
114 static void e1000_remove(struct pci_dev *pdev);
115 static int e1000_alloc_queues(struct e1000_adapter *adapter);
116 static int e1000_sw_init(struct e1000_adapter *adapter);
117 int e1000_open(struct net_device *netdev);
118 int e1000_close(struct net_device *netdev);
119 static void e1000_configure_tx(struct e1000_adapter *adapter);
120 static void e1000_configure_rx(struct e1000_adapter *adapter);
121 static void e1000_setup_rctl(struct e1000_adapter *adapter);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
125 struct e1000_tx_ring *tx_ring);
126 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
127 struct e1000_rx_ring *rx_ring);
128 static void e1000_set_rx_mode(struct net_device *netdev);
129 static void e1000_update_phy_info_task(struct work_struct *work);
130 static void e1000_watchdog(struct work_struct *work);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
132 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
133 struct net_device *netdev);
134 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
135 static int e1000_set_mac(struct net_device *netdev, void *p);
136 static irqreturn_t e1000_intr(int irq, void *data);
137 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
138 struct e1000_tx_ring *tx_ring);
139 static int e1000_clean(struct napi_struct *napi, int budget);
140 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
141 struct e1000_rx_ring *rx_ring,
142 int *work_done, int work_to_do);
143 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
144 struct e1000_rx_ring *rx_ring,
145 int *work_done, int work_to_do);
146 static void e1000_alloc_dummy_rx_buffers(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
151 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
152 struct e1000_rx_ring *rx_ring,
154 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
155 struct e1000_rx_ring *rx_ring,
157 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
158 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
160 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
161 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
162 static void e1000_tx_timeout(struct net_device *dev);
163 static void e1000_reset_task(struct work_struct *work);
164 static void e1000_smartspeed(struct e1000_adapter *adapter);
165 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
166 struct sk_buff *skb);
168 static bool e1000_vlan_used(struct e1000_adapter *adapter);
169 static void e1000_vlan_mode(struct net_device *netdev,
170 netdev_features_t features);
171 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
173 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
174 __be16 proto, u16 vid);
175 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
176 __be16 proto, u16 vid);
177 static void e1000_restore_vlan(struct e1000_adapter *adapter);
180 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
181 static int e1000_resume(struct pci_dev *pdev);
183 static void e1000_shutdown(struct pci_dev *pdev);
185 #ifdef CONFIG_NET_POLL_CONTROLLER
186 /* for netdump / net console */
187 static void e1000_netpoll (struct net_device *netdev);
190 #define COPYBREAK_DEFAULT 256
191 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
192 module_param(copybreak, uint, 0644);
193 MODULE_PARM_DESC(copybreak,
194 "Maximum size of packet that is copied to a new buffer on receive");
196 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
197 pci_channel_state_t state);
198 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
199 static void e1000_io_resume(struct pci_dev *pdev);
201 static const struct pci_error_handlers e1000_err_handler = {
202 .error_detected = e1000_io_error_detected,
203 .slot_reset = e1000_io_slot_reset,
204 .resume = e1000_io_resume,
207 static struct pci_driver e1000_driver = {
208 .name = e1000_driver_name,
209 .id_table = e1000_pci_tbl,
210 .probe = e1000_probe,
211 .remove = e1000_remove,
213 /* Power Management Hooks */
214 .suspend = e1000_suspend,
215 .resume = e1000_resume,
217 .shutdown = e1000_shutdown,
218 .err_handler = &e1000_err_handler
221 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
222 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
223 MODULE_LICENSE("GPL");
224 MODULE_VERSION(DRV_VERSION);
226 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
227 static int debug = -1;
228 module_param(debug, int, 0);
229 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
232 * e1000_get_hw_dev - return device
233 * used by hardware layer to print debugging information
236 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
238 struct e1000_adapter *adapter = hw->back;
239 return adapter->netdev;
243 * e1000_init_module - Driver Registration Routine
245 * e1000_init_module is the first routine called when the driver is
246 * loaded. All it does is register with the PCI subsystem.
248 static int __init e1000_init_module(void)
251 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
253 pr_info("%s\n", e1000_copyright);
255 ret = pci_register_driver(&e1000_driver);
256 if (copybreak != COPYBREAK_DEFAULT) {
258 pr_info("copybreak disabled\n");
260 pr_info("copybreak enabled for "
261 "packets <= %u bytes\n", copybreak);
266 module_init(e1000_init_module);
269 * e1000_exit_module - Driver Exit Cleanup Routine
271 * e1000_exit_module is called just before the driver is removed
274 static void __exit e1000_exit_module(void)
276 pci_unregister_driver(&e1000_driver);
279 module_exit(e1000_exit_module);
281 static int e1000_request_irq(struct e1000_adapter *adapter)
283 struct net_device *netdev = adapter->netdev;
284 irq_handler_t handler = e1000_intr;
285 int irq_flags = IRQF_SHARED;
288 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
291 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
297 static void e1000_free_irq(struct e1000_adapter *adapter)
299 struct net_device *netdev = adapter->netdev;
301 free_irq(adapter->pdev->irq, netdev);
305 * e1000_irq_disable - Mask off interrupt generation on the NIC
306 * @adapter: board private structure
308 static void e1000_irq_disable(struct e1000_adapter *adapter)
310 struct e1000_hw *hw = &adapter->hw;
314 synchronize_irq(adapter->pdev->irq);
318 * e1000_irq_enable - Enable default interrupt generation settings
319 * @adapter: board private structure
321 static void e1000_irq_enable(struct e1000_adapter *adapter)
323 struct e1000_hw *hw = &adapter->hw;
325 ew32(IMS, IMS_ENABLE_MASK);
329 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
331 struct e1000_hw *hw = &adapter->hw;
332 struct net_device *netdev = adapter->netdev;
333 u16 vid = hw->mng_cookie.vlan_id;
334 u16 old_vid = adapter->mng_vlan_id;
336 if (!e1000_vlan_used(adapter))
339 if (!test_bit(vid, adapter->active_vlans)) {
340 if (hw->mng_cookie.status &
341 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
342 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
343 adapter->mng_vlan_id = vid;
345 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
347 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
349 !test_bit(old_vid, adapter->active_vlans))
350 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
353 adapter->mng_vlan_id = vid;
357 static void e1000_init_manageability(struct e1000_adapter *adapter)
359 struct e1000_hw *hw = &adapter->hw;
361 if (adapter->en_mng_pt) {
362 u32 manc = er32(MANC);
364 /* disable hardware interception of ARP */
365 manc &= ~(E1000_MANC_ARP_EN);
371 static void e1000_release_manageability(struct e1000_adapter *adapter)
373 struct e1000_hw *hw = &adapter->hw;
375 if (adapter->en_mng_pt) {
376 u32 manc = er32(MANC);
378 /* re-enable hardware interception of ARP */
379 manc |= E1000_MANC_ARP_EN;
386 * e1000_configure - configure the hardware for RX and TX
387 * @adapter = private board structure
389 static void e1000_configure(struct e1000_adapter *adapter)
391 struct net_device *netdev = adapter->netdev;
394 e1000_set_rx_mode(netdev);
396 e1000_restore_vlan(adapter);
397 e1000_init_manageability(adapter);
399 e1000_configure_tx(adapter);
400 e1000_setup_rctl(adapter);
401 e1000_configure_rx(adapter);
402 /* call E1000_DESC_UNUSED which always leaves
403 * at least 1 descriptor unused to make sure
404 * next_to_use != next_to_clean
406 for (i = 0; i < adapter->num_rx_queues; i++) {
407 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
408 adapter->alloc_rx_buf(adapter, ring,
409 E1000_DESC_UNUSED(ring));
413 int e1000_up(struct e1000_adapter *adapter)
415 struct e1000_hw *hw = &adapter->hw;
417 /* hardware has been reset, we need to reload some things */
418 e1000_configure(adapter);
420 clear_bit(__E1000_DOWN, &adapter->flags);
422 napi_enable(&adapter->napi);
424 e1000_irq_enable(adapter);
426 netif_wake_queue(adapter->netdev);
428 /* fire a link change interrupt to start the watchdog */
429 ew32(ICS, E1000_ICS_LSC);
434 * e1000_power_up_phy - restore link in case the phy was powered down
435 * @adapter: address of board private structure
437 * The phy may be powered down to save power and turn off link when the
438 * driver is unloaded and wake on lan is not enabled (among others)
439 * *** this routine MUST be followed by a call to e1000_reset ***
441 void e1000_power_up_phy(struct e1000_adapter *adapter)
443 struct e1000_hw *hw = &adapter->hw;
446 /* Just clear the power down bit to wake the phy back up */
447 if (hw->media_type == e1000_media_type_copper) {
448 /* according to the manual, the phy will retain its
449 * settings across a power-down/up cycle
451 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
452 mii_reg &= ~MII_CR_POWER_DOWN;
453 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
457 static void e1000_power_down_phy(struct e1000_adapter *adapter)
459 struct e1000_hw *hw = &adapter->hw;
461 /* Power down the PHY so no link is implied when interface is down *
462 * The PHY cannot be powered down if any of the following is true *
465 * (c) SoL/IDER session is active
467 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
468 hw->media_type == e1000_media_type_copper) {
471 switch (hw->mac_type) {
474 case e1000_82545_rev_3:
477 case e1000_82546_rev_3:
479 case e1000_82541_rev_2:
481 case e1000_82547_rev_2:
482 if (er32(MANC) & E1000_MANC_SMBUS_EN)
488 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
489 mii_reg |= MII_CR_POWER_DOWN;
490 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
497 static void e1000_down_and_stop(struct e1000_adapter *adapter)
499 set_bit(__E1000_DOWN, &adapter->flags);
501 cancel_delayed_work_sync(&adapter->watchdog_task);
504 * Since the watchdog task can reschedule other tasks, we should cancel
505 * it first, otherwise we can run into the situation when a work is
506 * still running after the adapter has been turned down.
509 cancel_delayed_work_sync(&adapter->phy_info_task);
510 cancel_delayed_work_sync(&adapter->fifo_stall_task);
512 /* Only kill reset task if adapter is not resetting */
513 if (!test_bit(__E1000_RESETTING, &adapter->flags))
514 cancel_work_sync(&adapter->reset_task);
517 void e1000_down(struct e1000_adapter *adapter)
519 struct e1000_hw *hw = &adapter->hw;
520 struct net_device *netdev = adapter->netdev;
523 /* disable receives in the hardware */
525 ew32(RCTL, rctl & ~E1000_RCTL_EN);
526 /* flush and sleep below */
528 netif_tx_disable(netdev);
530 /* disable transmits in the hardware */
532 tctl &= ~E1000_TCTL_EN;
534 /* flush both disables and wait for them to finish */
538 /* Set the carrier off after transmits have been disabled in the
539 * hardware, to avoid race conditions with e1000_watchdog() (which
540 * may be running concurrently to us, checking for the carrier
541 * bit to decide whether it should enable transmits again). Such
542 * a race condition would result into transmission being disabled
543 * in the hardware until the next IFF_DOWN+IFF_UP cycle.
545 netif_carrier_off(netdev);
547 napi_disable(&adapter->napi);
549 e1000_irq_disable(adapter);
551 /* Setting DOWN must be after irq_disable to prevent
552 * a screaming interrupt. Setting DOWN also prevents
553 * tasks from rescheduling.
555 e1000_down_and_stop(adapter);
557 adapter->link_speed = 0;
558 adapter->link_duplex = 0;
560 e1000_reset(adapter);
561 e1000_clean_all_tx_rings(adapter);
562 e1000_clean_all_rx_rings(adapter);
565 void e1000_reinit_locked(struct e1000_adapter *adapter)
567 WARN_ON(in_interrupt());
568 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
572 clear_bit(__E1000_RESETTING, &adapter->flags);
575 void e1000_reset(struct e1000_adapter *adapter)
577 struct e1000_hw *hw = &adapter->hw;
578 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
579 bool legacy_pba_adjust = false;
582 /* Repartition Pba for greater than 9k mtu
583 * To take effect CTRL.RST is required.
586 switch (hw->mac_type) {
587 case e1000_82542_rev2_0:
588 case e1000_82542_rev2_1:
593 case e1000_82541_rev_2:
594 legacy_pba_adjust = true;
598 case e1000_82545_rev_3:
601 case e1000_82546_rev_3:
605 case e1000_82547_rev_2:
606 legacy_pba_adjust = true;
609 case e1000_undefined:
614 if (legacy_pba_adjust) {
615 if (hw->max_frame_size > E1000_RXBUFFER_8192)
616 pba -= 8; /* allocate more FIFO for Tx */
618 if (hw->mac_type == e1000_82547) {
619 adapter->tx_fifo_head = 0;
620 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
621 adapter->tx_fifo_size =
622 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
623 atomic_set(&adapter->tx_fifo_stall, 0);
625 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
626 /* adjust PBA for jumbo frames */
629 /* To maintain wire speed transmits, the Tx FIFO should be
630 * large enough to accommodate two full transmit packets,
631 * rounded up to the next 1KB and expressed in KB. Likewise,
632 * the Rx FIFO should be large enough to accommodate at least
633 * one full receive packet and is similarly rounded up and
637 /* upper 16 bits has Tx packet buffer allocation size in KB */
638 tx_space = pba >> 16;
639 /* lower 16 bits has Rx packet buffer allocation size in KB */
641 /* the Tx fifo also stores 16 bytes of information about the Tx
642 * but don't include ethernet FCS because hardware appends it
644 min_tx_space = (hw->max_frame_size +
645 sizeof(struct e1000_tx_desc) -
647 min_tx_space = ALIGN(min_tx_space, 1024);
649 /* software strips receive CRC, so leave room for it */
650 min_rx_space = hw->max_frame_size;
651 min_rx_space = ALIGN(min_rx_space, 1024);
654 /* If current Tx allocation is less than the min Tx FIFO size,
655 * and the min Tx FIFO size is less than the current Rx FIFO
656 * allocation, take space away from current Rx allocation
658 if (tx_space < min_tx_space &&
659 ((min_tx_space - tx_space) < pba)) {
660 pba = pba - (min_tx_space - tx_space);
662 /* PCI/PCIx hardware has PBA alignment constraints */
663 switch (hw->mac_type) {
664 case e1000_82545 ... e1000_82546_rev_3:
665 pba &= ~(E1000_PBA_8K - 1);
671 /* if short on Rx space, Rx wins and must trump Tx
672 * adjustment or use Early Receive if available
674 if (pba < min_rx_space)
681 /* flow control settings:
682 * The high water mark must be low enough to fit one full frame
683 * (or the size used for early receive) above it in the Rx FIFO.
684 * Set it to the lower of:
685 * - 90% of the Rx FIFO size, and
686 * - the full Rx FIFO size minus the early receive size (for parts
687 * with ERT support assuming ERT set to E1000_ERT_2048), or
688 * - the full Rx FIFO size minus one full frame
690 hwm = min(((pba << 10) * 9 / 10),
691 ((pba << 10) - hw->max_frame_size));
693 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
694 hw->fc_low_water = hw->fc_high_water - 8;
695 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
697 hw->fc = hw->original_fc;
699 /* Allow time for pending master requests to run */
701 if (hw->mac_type >= e1000_82544)
704 if (e1000_init_hw(hw))
705 e_dev_err("Hardware Error\n");
706 e1000_update_mng_vlan(adapter);
708 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
709 if (hw->mac_type >= e1000_82544 &&
711 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
712 u32 ctrl = er32(CTRL);
713 /* clear phy power management bit if we are in gig only mode,
714 * which if enabled will attempt negotiation to 100Mb, which
715 * can cause a loss of link at power off or driver unload
717 ctrl &= ~E1000_CTRL_SWDPIN3;
721 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
722 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
724 e1000_reset_adaptive(hw);
725 e1000_phy_get_info(hw, &adapter->phy_info);
727 e1000_release_manageability(adapter);
730 /* Dump the eeprom for users having checksum issues */
731 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
733 struct net_device *netdev = adapter->netdev;
734 struct ethtool_eeprom eeprom;
735 const struct ethtool_ops *ops = netdev->ethtool_ops;
738 u16 csum_old, csum_new = 0;
740 eeprom.len = ops->get_eeprom_len(netdev);
743 data = kmalloc(eeprom.len, GFP_KERNEL);
747 ops->get_eeprom(netdev, &eeprom, data);
749 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
750 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
751 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
752 csum_new += data[i] + (data[i + 1] << 8);
753 csum_new = EEPROM_SUM - csum_new;
755 pr_err("/*********************/\n");
756 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
757 pr_err("Calculated : 0x%04x\n", csum_new);
759 pr_err("Offset Values\n");
760 pr_err("======== ======\n");
761 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
763 pr_err("Include this output when contacting your support provider.\n");
764 pr_err("This is not a software error! Something bad happened to\n");
765 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
766 pr_err("result in further problems, possibly loss of data,\n");
767 pr_err("corruption or system hangs!\n");
768 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
769 pr_err("which is invalid and requires you to set the proper MAC\n");
770 pr_err("address manually before continuing to enable this network\n");
771 pr_err("device. Please inspect the EEPROM dump and report the\n");
772 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
773 pr_err("/*********************/\n");
779 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
780 * @pdev: PCI device information struct
782 * Return true if an adapter needs ioport resources
784 static int e1000_is_need_ioport(struct pci_dev *pdev)
786 switch (pdev->device) {
787 case E1000_DEV_ID_82540EM:
788 case E1000_DEV_ID_82540EM_LOM:
789 case E1000_DEV_ID_82540EP:
790 case E1000_DEV_ID_82540EP_LOM:
791 case E1000_DEV_ID_82540EP_LP:
792 case E1000_DEV_ID_82541EI:
793 case E1000_DEV_ID_82541EI_MOBILE:
794 case E1000_DEV_ID_82541ER:
795 case E1000_DEV_ID_82541ER_LOM:
796 case E1000_DEV_ID_82541GI:
797 case E1000_DEV_ID_82541GI_LF:
798 case E1000_DEV_ID_82541GI_MOBILE:
799 case E1000_DEV_ID_82544EI_COPPER:
800 case E1000_DEV_ID_82544EI_FIBER:
801 case E1000_DEV_ID_82544GC_COPPER:
802 case E1000_DEV_ID_82544GC_LOM:
803 case E1000_DEV_ID_82545EM_COPPER:
804 case E1000_DEV_ID_82545EM_FIBER:
805 case E1000_DEV_ID_82546EB_COPPER:
806 case E1000_DEV_ID_82546EB_FIBER:
807 case E1000_DEV_ID_82546EB_QUAD_COPPER:
814 static netdev_features_t e1000_fix_features(struct net_device *netdev,
815 netdev_features_t features)
817 /* Since there is no support for separate Rx/Tx vlan accel
818 * enable/disable make sure Tx flag is always in same state as Rx.
820 if (features & NETIF_F_HW_VLAN_CTAG_RX)
821 features |= NETIF_F_HW_VLAN_CTAG_TX;
823 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
828 static int e1000_set_features(struct net_device *netdev,
829 netdev_features_t features)
831 struct e1000_adapter *adapter = netdev_priv(netdev);
832 netdev_features_t changed = features ^ netdev->features;
834 if (changed & NETIF_F_HW_VLAN_CTAG_RX)
835 e1000_vlan_mode(netdev, features);
837 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL)))
840 netdev->features = features;
841 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
843 if (netif_running(netdev))
844 e1000_reinit_locked(adapter);
846 e1000_reset(adapter);
851 static const struct net_device_ops e1000_netdev_ops = {
852 .ndo_open = e1000_open,
853 .ndo_stop = e1000_close,
854 .ndo_start_xmit = e1000_xmit_frame,
855 .ndo_set_rx_mode = e1000_set_rx_mode,
856 .ndo_set_mac_address = e1000_set_mac,
857 .ndo_tx_timeout = e1000_tx_timeout,
858 .ndo_change_mtu = e1000_change_mtu,
859 .ndo_do_ioctl = e1000_ioctl,
860 .ndo_validate_addr = eth_validate_addr,
861 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
862 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
863 #ifdef CONFIG_NET_POLL_CONTROLLER
864 .ndo_poll_controller = e1000_netpoll,
866 .ndo_fix_features = e1000_fix_features,
867 .ndo_set_features = e1000_set_features,
871 * e1000_init_hw_struct - initialize members of hw struct
872 * @adapter: board private struct
873 * @hw: structure used by e1000_hw.c
875 * Factors out initialization of the e1000_hw struct to its own function
876 * that can be called very early at init (just after struct allocation).
877 * Fields are initialized based on PCI device information and
878 * OS network device settings (MTU size).
879 * Returns negative error codes if MAC type setup fails.
881 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
884 struct pci_dev *pdev = adapter->pdev;
886 /* PCI config space info */
887 hw->vendor_id = pdev->vendor;
888 hw->device_id = pdev->device;
889 hw->subsystem_vendor_id = pdev->subsystem_vendor;
890 hw->subsystem_id = pdev->subsystem_device;
891 hw->revision_id = pdev->revision;
893 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
895 hw->max_frame_size = adapter->netdev->mtu +
896 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
897 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
899 /* identify the MAC */
900 if (e1000_set_mac_type(hw)) {
901 e_err(probe, "Unknown MAC Type\n");
905 switch (hw->mac_type) {
910 case e1000_82541_rev_2:
911 case e1000_82547_rev_2:
912 hw->phy_init_script = 1;
916 e1000_set_media_type(hw);
917 e1000_get_bus_info(hw);
919 hw->wait_autoneg_complete = false;
920 hw->tbi_compatibility_en = true;
921 hw->adaptive_ifs = true;
925 if (hw->media_type == e1000_media_type_copper) {
926 hw->mdix = AUTO_ALL_MODES;
927 hw->disable_polarity_correction = false;
928 hw->master_slave = E1000_MASTER_SLAVE;
935 * e1000_probe - Device Initialization Routine
936 * @pdev: PCI device information struct
937 * @ent: entry in e1000_pci_tbl
939 * Returns 0 on success, negative on failure
941 * e1000_probe initializes an adapter identified by a pci_dev structure.
942 * The OS initialization, configuring of the adapter private structure,
943 * and a hardware reset occur.
945 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
947 struct net_device *netdev;
948 struct e1000_adapter *adapter = NULL;
951 static int cards_found;
952 static int global_quad_port_a; /* global ksp3 port a indication */
953 int i, err, pci_using_dac;
956 u16 eeprom_apme_mask = E1000_EEPROM_APME;
957 int bars, need_ioport;
958 bool disable_dev = false;
960 /* do not allocate ioport bars when not needed */
961 need_ioport = e1000_is_need_ioport(pdev);
963 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
964 err = pci_enable_device(pdev);
966 bars = pci_select_bars(pdev, IORESOURCE_MEM);
967 err = pci_enable_device_mem(pdev);
972 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
976 pci_set_master(pdev);
977 err = pci_save_state(pdev);
979 goto err_alloc_etherdev;
982 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
984 goto err_alloc_etherdev;
986 SET_NETDEV_DEV(netdev, &pdev->dev);
988 pci_set_drvdata(pdev, netdev);
989 adapter = netdev_priv(netdev);
990 adapter->netdev = netdev;
991 adapter->pdev = pdev;
992 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
993 adapter->bars = bars;
994 adapter->need_ioport = need_ioport;
1000 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
1004 if (adapter->need_ioport) {
1005 for (i = BAR_1; i <= BAR_5; i++) {
1006 if (pci_resource_len(pdev, i) == 0)
1008 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1009 hw->io_base = pci_resource_start(pdev, i);
1015 /* make ready for any if (hw->...) below */
1016 err = e1000_init_hw_struct(adapter, hw);
1020 /* there is a workaround being applied below that limits
1021 * 64-bit DMA addresses to 64-bit hardware. There are some
1022 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1025 if ((hw->bus_type == e1000_bus_type_pcix) &&
1026 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
1029 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
1031 pr_err("No usable DMA config, aborting\n");
1036 netdev->netdev_ops = &e1000_netdev_ops;
1037 e1000_set_ethtool_ops(netdev);
1038 netdev->watchdog_timeo = 5 * HZ;
1039 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1041 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1043 adapter->bd_number = cards_found;
1045 /* setup the private structure */
1047 err = e1000_sw_init(adapter);
1052 if (hw->mac_type == e1000_ce4100) {
1053 hw->ce4100_gbe_mdio_base_virt =
1054 ioremap(pci_resource_start(pdev, BAR_1),
1055 pci_resource_len(pdev, BAR_1));
1057 if (!hw->ce4100_gbe_mdio_base_virt)
1058 goto err_mdio_ioremap;
1061 if (hw->mac_type >= e1000_82543) {
1062 netdev->hw_features = NETIF_F_SG |
1064 NETIF_F_HW_VLAN_CTAG_RX;
1065 netdev->features = NETIF_F_HW_VLAN_CTAG_TX |
1066 NETIF_F_HW_VLAN_CTAG_FILTER;
1069 if ((hw->mac_type >= e1000_82544) &&
1070 (hw->mac_type != e1000_82547))
1071 netdev->hw_features |= NETIF_F_TSO;
1073 netdev->priv_flags |= IFF_SUPP_NOFCS;
1075 netdev->features |= netdev->hw_features;
1076 netdev->hw_features |= (NETIF_F_RXCSUM |
1080 if (pci_using_dac) {
1081 netdev->features |= NETIF_F_HIGHDMA;
1082 netdev->vlan_features |= NETIF_F_HIGHDMA;
1085 netdev->vlan_features |= (NETIF_F_TSO |
1089 /* Do not set IFF_UNICAST_FLT for VMWare's 82545EM */
1090 if (hw->device_id != E1000_DEV_ID_82545EM_COPPER ||
1091 hw->subsystem_vendor_id != PCI_VENDOR_ID_VMWARE)
1092 netdev->priv_flags |= IFF_UNICAST_FLT;
1094 /* MTU range: 46 - 16110 */
1095 netdev->min_mtu = ETH_ZLEN - ETH_HLEN;
1096 netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
1098 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1100 /* initialize eeprom parameters */
1101 if (e1000_init_eeprom_params(hw)) {
1102 e_err(probe, "EEPROM initialization failed\n");
1106 /* before reading the EEPROM, reset the controller to
1107 * put the device in a known good starting state
1112 /* make sure the EEPROM is good */
1113 if (e1000_validate_eeprom_checksum(hw) < 0) {
1114 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1115 e1000_dump_eeprom(adapter);
1116 /* set MAC address to all zeroes to invalidate and temporary
1117 * disable this device for the user. This blocks regular
1118 * traffic while still permitting ethtool ioctls from reaching
1119 * the hardware as well as allowing the user to run the
1120 * interface after manually setting a hw addr using
1123 memset(hw->mac_addr, 0, netdev->addr_len);
1125 /* copy the MAC address out of the EEPROM */
1126 if (e1000_read_mac_addr(hw))
1127 e_err(probe, "EEPROM Read Error\n");
1129 /* don't block initialization here due to bad MAC address */
1130 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1132 if (!is_valid_ether_addr(netdev->dev_addr))
1133 e_err(probe, "Invalid MAC Address\n");
1136 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1137 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1138 e1000_82547_tx_fifo_stall_task);
1139 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1140 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1142 e1000_check_options(adapter);
1144 /* Initial Wake on LAN setting
1145 * If APM wake is enabled in the EEPROM,
1146 * enable the ACPI Magic Packet filter
1149 switch (hw->mac_type) {
1150 case e1000_82542_rev2_0:
1151 case e1000_82542_rev2_1:
1155 e1000_read_eeprom(hw,
1156 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1157 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1160 case e1000_82546_rev_3:
1161 if (er32(STATUS) & E1000_STATUS_FUNC_1) {
1162 e1000_read_eeprom(hw,
1163 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1168 e1000_read_eeprom(hw,
1169 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1172 if (eeprom_data & eeprom_apme_mask)
1173 adapter->eeprom_wol |= E1000_WUFC_MAG;
1175 /* now that we have the eeprom settings, apply the special cases
1176 * where the eeprom may be wrong or the board simply won't support
1177 * wake on lan on a particular port
1179 switch (pdev->device) {
1180 case E1000_DEV_ID_82546GB_PCIE:
1181 adapter->eeprom_wol = 0;
1183 case E1000_DEV_ID_82546EB_FIBER:
1184 case E1000_DEV_ID_82546GB_FIBER:
1185 /* Wake events only supported on port A for dual fiber
1186 * regardless of eeprom setting
1188 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1189 adapter->eeprom_wol = 0;
1191 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1192 /* if quad port adapter, disable WoL on all but port A */
1193 if (global_quad_port_a != 0)
1194 adapter->eeprom_wol = 0;
1196 adapter->quad_port_a = true;
1197 /* Reset for multiple quad port adapters */
1198 if (++global_quad_port_a == 4)
1199 global_quad_port_a = 0;
1203 /* initialize the wol settings based on the eeprom settings */
1204 adapter->wol = adapter->eeprom_wol;
1205 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1207 /* Auto detect PHY address */
1208 if (hw->mac_type == e1000_ce4100) {
1209 for (i = 0; i < 32; i++) {
1211 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1213 if (tmp != 0 && tmp != 0xFF)
1221 /* reset the hardware with the new settings */
1222 e1000_reset(adapter);
1224 strcpy(netdev->name, "eth%d");
1225 err = register_netdev(netdev);
1229 e1000_vlan_filter_on_off(adapter, false);
1231 /* print bus type/speed/width info */
1232 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1233 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1234 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1235 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1236 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1237 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1238 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1241 /* carrier off reporting is important to ethtool even BEFORE open */
1242 netif_carrier_off(netdev);
1244 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1251 e1000_phy_hw_reset(hw);
1253 if (hw->flash_address)
1254 iounmap(hw->flash_address);
1255 kfree(adapter->tx_ring);
1256 kfree(adapter->rx_ring);
1260 iounmap(hw->ce4100_gbe_mdio_base_virt);
1261 iounmap(hw->hw_addr);
1263 disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags);
1264 free_netdev(netdev);
1266 pci_release_selected_regions(pdev, bars);
1268 if (!adapter || disable_dev)
1269 pci_disable_device(pdev);
1274 * e1000_remove - Device Removal Routine
1275 * @pdev: PCI device information struct
1277 * e1000_remove is called by the PCI subsystem to alert the driver
1278 * that it should release a PCI device. That could be caused by a
1279 * Hot-Plug event, or because the driver is going to be removed from
1282 static void e1000_remove(struct pci_dev *pdev)
1284 struct net_device *netdev = pci_get_drvdata(pdev);
1285 struct e1000_adapter *adapter = netdev_priv(netdev);
1286 struct e1000_hw *hw = &adapter->hw;
1289 e1000_down_and_stop(adapter);
1290 e1000_release_manageability(adapter);
1292 unregister_netdev(netdev);
1294 e1000_phy_hw_reset(hw);
1296 kfree(adapter->tx_ring);
1297 kfree(adapter->rx_ring);
1299 if (hw->mac_type == e1000_ce4100)
1300 iounmap(hw->ce4100_gbe_mdio_base_virt);
1301 iounmap(hw->hw_addr);
1302 if (hw->flash_address)
1303 iounmap(hw->flash_address);
1304 pci_release_selected_regions(pdev, adapter->bars);
1306 disable_dev = !test_and_set_bit(__E1000_DISABLED, &adapter->flags);
1307 free_netdev(netdev);
1310 pci_disable_device(pdev);
1314 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1315 * @adapter: board private structure to initialize
1317 * e1000_sw_init initializes the Adapter private data structure.
1318 * e1000_init_hw_struct MUST be called before this function
1320 static int e1000_sw_init(struct e1000_adapter *adapter)
1322 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1324 adapter->num_tx_queues = 1;
1325 adapter->num_rx_queues = 1;
1327 if (e1000_alloc_queues(adapter)) {
1328 e_err(probe, "Unable to allocate memory for queues\n");
1332 /* Explicitly disable IRQ since the NIC can be in any state. */
1333 e1000_irq_disable(adapter);
1335 spin_lock_init(&adapter->stats_lock);
1337 set_bit(__E1000_DOWN, &adapter->flags);
1343 * e1000_alloc_queues - Allocate memory for all rings
1344 * @adapter: board private structure to initialize
1346 * We allocate one ring per queue at run-time since we don't know the
1347 * number of queues at compile-time.
1349 static int e1000_alloc_queues(struct e1000_adapter *adapter)
1351 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1352 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1353 if (!adapter->tx_ring)
1356 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1357 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1358 if (!adapter->rx_ring) {
1359 kfree(adapter->tx_ring);
1363 return E1000_SUCCESS;
1367 * e1000_open - Called when a network interface is made active
1368 * @netdev: network interface device structure
1370 * Returns 0 on success, negative value on failure
1372 * The open entry point is called when a network interface is made
1373 * active by the system (IFF_UP). At this point all resources needed
1374 * for transmit and receive operations are allocated, the interrupt
1375 * handler is registered with the OS, the watchdog task is started,
1376 * and the stack is notified that the interface is ready.
1378 int e1000_open(struct net_device *netdev)
1380 struct e1000_adapter *adapter = netdev_priv(netdev);
1381 struct e1000_hw *hw = &adapter->hw;
1384 /* disallow open during test */
1385 if (test_bit(__E1000_TESTING, &adapter->flags))
1388 netif_carrier_off(netdev);
1390 /* allocate transmit descriptors */
1391 err = e1000_setup_all_tx_resources(adapter);
1395 /* allocate receive descriptors */
1396 err = e1000_setup_all_rx_resources(adapter);
1400 e1000_power_up_phy(adapter);
1402 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1403 if ((hw->mng_cookie.status &
1404 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1405 e1000_update_mng_vlan(adapter);
1408 /* before we allocate an interrupt, we must be ready to handle it.
1409 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1410 * as soon as we call pci_request_irq, so we have to setup our
1411 * clean_rx handler before we do so.
1413 e1000_configure(adapter);
1415 err = e1000_request_irq(adapter);
1419 /* From here on the code is the same as e1000_up() */
1420 clear_bit(__E1000_DOWN, &adapter->flags);
1422 napi_enable(&adapter->napi);
1424 e1000_irq_enable(adapter);
1426 netif_start_queue(netdev);
1428 /* fire a link status change interrupt to start the watchdog */
1429 ew32(ICS, E1000_ICS_LSC);
1431 return E1000_SUCCESS;
1434 e1000_power_down_phy(adapter);
1435 e1000_free_all_rx_resources(adapter);
1437 e1000_free_all_tx_resources(adapter);
1439 e1000_reset(adapter);
1445 * e1000_close - Disables a network interface
1446 * @netdev: network interface device structure
1448 * Returns 0, this is not allowed to fail
1450 * The close entry point is called when an interface is de-activated
1451 * by the OS. The hardware is still under the drivers control, but
1452 * needs to be disabled. A global MAC reset is issued to stop the
1453 * hardware, and all transmit and receive resources are freed.
1455 int e1000_close(struct net_device *netdev)
1457 struct e1000_adapter *adapter = netdev_priv(netdev);
1458 struct e1000_hw *hw = &adapter->hw;
1459 int count = E1000_CHECK_RESET_COUNT;
1461 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
1462 usleep_range(10000, 20000);
1464 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1465 e1000_down(adapter);
1466 e1000_power_down_phy(adapter);
1467 e1000_free_irq(adapter);
1469 e1000_free_all_tx_resources(adapter);
1470 e1000_free_all_rx_resources(adapter);
1472 /* kill manageability vlan ID if supported, but not if a vlan with
1473 * the same ID is registered on the host OS (let 8021q kill it)
1475 if ((hw->mng_cookie.status &
1476 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1477 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1478 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
1479 adapter->mng_vlan_id);
1486 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1487 * @adapter: address of board private structure
1488 * @start: address of beginning of memory
1489 * @len: length of memory
1491 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1494 struct e1000_hw *hw = &adapter->hw;
1495 unsigned long begin = (unsigned long)start;
1496 unsigned long end = begin + len;
1498 /* First rev 82545 and 82546 need to not allow any memory
1499 * write location to cross 64k boundary due to errata 23
1501 if (hw->mac_type == e1000_82545 ||
1502 hw->mac_type == e1000_ce4100 ||
1503 hw->mac_type == e1000_82546) {
1504 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1511 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1512 * @adapter: board private structure
1513 * @txdr: tx descriptor ring (for a specific queue) to setup
1515 * Return 0 on success, negative on failure
1517 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1518 struct e1000_tx_ring *txdr)
1520 struct pci_dev *pdev = adapter->pdev;
1523 size = sizeof(struct e1000_tx_buffer) * txdr->count;
1524 txdr->buffer_info = vzalloc(size);
1525 if (!txdr->buffer_info)
1528 /* round up to nearest 4K */
1530 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1531 txdr->size = ALIGN(txdr->size, 4096);
1533 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1537 vfree(txdr->buffer_info);
1541 /* Fix for errata 23, can't cross 64kB boundary */
1542 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1543 void *olddesc = txdr->desc;
1544 dma_addr_t olddma = txdr->dma;
1545 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1546 txdr->size, txdr->desc);
1547 /* Try again, without freeing the previous */
1548 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1549 &txdr->dma, GFP_KERNEL);
1550 /* Failed allocation, critical failure */
1552 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1554 goto setup_tx_desc_die;
1557 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1559 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1561 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1563 e_err(probe, "Unable to allocate aligned memory "
1564 "for the transmit descriptor ring\n");
1565 vfree(txdr->buffer_info);
1568 /* Free old allocation, new allocation was successful */
1569 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1573 memset(txdr->desc, 0, txdr->size);
1575 txdr->next_to_use = 0;
1576 txdr->next_to_clean = 0;
1582 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1583 * (Descriptors) for all queues
1584 * @adapter: board private structure
1586 * Return 0 on success, negative on failure
1588 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1592 for (i = 0; i < adapter->num_tx_queues; i++) {
1593 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1595 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1596 for (i-- ; i >= 0; i--)
1597 e1000_free_tx_resources(adapter,
1598 &adapter->tx_ring[i]);
1607 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1608 * @adapter: board private structure
1610 * Configure the Tx unit of the MAC after a reset.
1612 static void e1000_configure_tx(struct e1000_adapter *adapter)
1615 struct e1000_hw *hw = &adapter->hw;
1616 u32 tdlen, tctl, tipg;
1619 /* Setup the HW Tx Head and Tail descriptor pointers */
1621 switch (adapter->num_tx_queues) {
1624 tdba = adapter->tx_ring[0].dma;
1625 tdlen = adapter->tx_ring[0].count *
1626 sizeof(struct e1000_tx_desc);
1628 ew32(TDBAH, (tdba >> 32));
1629 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1632 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ?
1633 E1000_TDH : E1000_82542_TDH);
1634 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ?
1635 E1000_TDT : E1000_82542_TDT);
1639 /* Set the default values for the Tx Inter Packet Gap timer */
1640 if ((hw->media_type == e1000_media_type_fiber ||
1641 hw->media_type == e1000_media_type_internal_serdes))
1642 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1644 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1646 switch (hw->mac_type) {
1647 case e1000_82542_rev2_0:
1648 case e1000_82542_rev2_1:
1649 tipg = DEFAULT_82542_TIPG_IPGT;
1650 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1651 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1654 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1655 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1658 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1659 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1662 /* Set the Tx Interrupt Delay register */
1664 ew32(TIDV, adapter->tx_int_delay);
1665 if (hw->mac_type >= e1000_82540)
1666 ew32(TADV, adapter->tx_abs_int_delay);
1668 /* Program the Transmit Control Register */
1671 tctl &= ~E1000_TCTL_CT;
1672 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1673 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1675 e1000_config_collision_dist(hw);
1677 /* Setup Transmit Descriptor Settings for eop descriptor */
1678 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1680 /* only set IDE if we are delaying interrupts using the timers */
1681 if (adapter->tx_int_delay)
1682 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1684 if (hw->mac_type < e1000_82543)
1685 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1687 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1689 /* Cache if we're 82544 running in PCI-X because we'll
1690 * need this to apply a workaround later in the send path.
1692 if (hw->mac_type == e1000_82544 &&
1693 hw->bus_type == e1000_bus_type_pcix)
1694 adapter->pcix_82544 = true;
1701 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1702 * @adapter: board private structure
1703 * @rxdr: rx descriptor ring (for a specific queue) to setup
1705 * Returns 0 on success, negative on failure
1707 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1708 struct e1000_rx_ring *rxdr)
1710 struct pci_dev *pdev = adapter->pdev;
1713 size = sizeof(struct e1000_rx_buffer) * rxdr->count;
1714 rxdr->buffer_info = vzalloc(size);
1715 if (!rxdr->buffer_info)
1718 desc_len = sizeof(struct e1000_rx_desc);
1720 /* Round up to nearest 4K */
1722 rxdr->size = rxdr->count * desc_len;
1723 rxdr->size = ALIGN(rxdr->size, 4096);
1725 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1729 vfree(rxdr->buffer_info);
1733 /* Fix for errata 23, can't cross 64kB boundary */
1734 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1735 void *olddesc = rxdr->desc;
1736 dma_addr_t olddma = rxdr->dma;
1737 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1738 rxdr->size, rxdr->desc);
1739 /* Try again, without freeing the previous */
1740 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1741 &rxdr->dma, GFP_KERNEL);
1742 /* Failed allocation, critical failure */
1744 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1746 goto setup_rx_desc_die;
1749 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1751 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1753 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1755 e_err(probe, "Unable to allocate aligned memory for "
1756 "the Rx descriptor ring\n");
1757 goto setup_rx_desc_die;
1759 /* Free old allocation, new allocation was successful */
1760 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1764 memset(rxdr->desc, 0, rxdr->size);
1766 rxdr->next_to_clean = 0;
1767 rxdr->next_to_use = 0;
1768 rxdr->rx_skb_top = NULL;
1774 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1775 * (Descriptors) for all queues
1776 * @adapter: board private structure
1778 * Return 0 on success, negative on failure
1780 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1784 for (i = 0; i < adapter->num_rx_queues; i++) {
1785 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1787 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1788 for (i-- ; i >= 0; i--)
1789 e1000_free_rx_resources(adapter,
1790 &adapter->rx_ring[i]);
1799 * e1000_setup_rctl - configure the receive control registers
1800 * @adapter: Board private structure
1802 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1804 struct e1000_hw *hw = &adapter->hw;
1809 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1811 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1812 E1000_RCTL_RDMTS_HALF |
1813 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1815 if (hw->tbi_compatibility_on == 1)
1816 rctl |= E1000_RCTL_SBP;
1818 rctl &= ~E1000_RCTL_SBP;
1820 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1821 rctl &= ~E1000_RCTL_LPE;
1823 rctl |= E1000_RCTL_LPE;
1825 /* Setup buffer sizes */
1826 rctl &= ~E1000_RCTL_SZ_4096;
1827 rctl |= E1000_RCTL_BSEX;
1828 switch (adapter->rx_buffer_len) {
1829 case E1000_RXBUFFER_2048:
1831 rctl |= E1000_RCTL_SZ_2048;
1832 rctl &= ~E1000_RCTL_BSEX;
1834 case E1000_RXBUFFER_4096:
1835 rctl |= E1000_RCTL_SZ_4096;
1837 case E1000_RXBUFFER_8192:
1838 rctl |= E1000_RCTL_SZ_8192;
1840 case E1000_RXBUFFER_16384:
1841 rctl |= E1000_RCTL_SZ_16384;
1845 /* This is useful for sniffing bad packets. */
1846 if (adapter->netdev->features & NETIF_F_RXALL) {
1847 /* UPE and MPE will be handled by normal PROMISC logic
1848 * in e1000e_set_rx_mode
1850 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
1851 E1000_RCTL_BAM | /* RX All Bcast Pkts */
1852 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
1854 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
1855 E1000_RCTL_DPF | /* Allow filtered pause */
1856 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
1857 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1858 * and that breaks VLANs.
1866 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1867 * @adapter: board private structure
1869 * Configure the Rx unit of the MAC after a reset.
1871 static void e1000_configure_rx(struct e1000_adapter *adapter)
1874 struct e1000_hw *hw = &adapter->hw;
1875 u32 rdlen, rctl, rxcsum;
1877 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1878 rdlen = adapter->rx_ring[0].count *
1879 sizeof(struct e1000_rx_desc);
1880 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1881 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1883 rdlen = adapter->rx_ring[0].count *
1884 sizeof(struct e1000_rx_desc);
1885 adapter->clean_rx = e1000_clean_rx_irq;
1886 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1889 /* disable receives while setting up the descriptors */
1891 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1893 /* set the Receive Delay Timer Register */
1894 ew32(RDTR, adapter->rx_int_delay);
1896 if (hw->mac_type >= e1000_82540) {
1897 ew32(RADV, adapter->rx_abs_int_delay);
1898 if (adapter->itr_setting != 0)
1899 ew32(ITR, 1000000000 / (adapter->itr * 256));
1902 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1903 * the Base and Length of the Rx Descriptor Ring
1905 switch (adapter->num_rx_queues) {
1908 rdba = adapter->rx_ring[0].dma;
1910 ew32(RDBAH, (rdba >> 32));
1911 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1914 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ?
1915 E1000_RDH : E1000_82542_RDH);
1916 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ?
1917 E1000_RDT : E1000_82542_RDT);
1921 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1922 if (hw->mac_type >= e1000_82543) {
1923 rxcsum = er32(RXCSUM);
1924 if (adapter->rx_csum)
1925 rxcsum |= E1000_RXCSUM_TUOFL;
1927 /* don't need to clear IPPCSE as it defaults to 0 */
1928 rxcsum &= ~E1000_RXCSUM_TUOFL;
1929 ew32(RXCSUM, rxcsum);
1932 /* Enable Receives */
1933 ew32(RCTL, rctl | E1000_RCTL_EN);
1937 * e1000_free_tx_resources - Free Tx Resources per Queue
1938 * @adapter: board private structure
1939 * @tx_ring: Tx descriptor ring for a specific queue
1941 * Free all transmit software resources
1943 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1944 struct e1000_tx_ring *tx_ring)
1946 struct pci_dev *pdev = adapter->pdev;
1948 e1000_clean_tx_ring(adapter, tx_ring);
1950 vfree(tx_ring->buffer_info);
1951 tx_ring->buffer_info = NULL;
1953 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1956 tx_ring->desc = NULL;
1960 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1961 * @adapter: board private structure
1963 * Free all transmit software resources
1965 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1969 for (i = 0; i < adapter->num_tx_queues; i++)
1970 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1974 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1975 struct e1000_tx_buffer *buffer_info)
1977 if (buffer_info->dma) {
1978 if (buffer_info->mapped_as_page)
1979 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1980 buffer_info->length, DMA_TO_DEVICE);
1982 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1983 buffer_info->length,
1985 buffer_info->dma = 0;
1987 if (buffer_info->skb) {
1988 dev_kfree_skb_any(buffer_info->skb);
1989 buffer_info->skb = NULL;
1991 buffer_info->time_stamp = 0;
1992 /* buffer_info must be completely set up in the transmit path */
1996 * e1000_clean_tx_ring - Free Tx Buffers
1997 * @adapter: board private structure
1998 * @tx_ring: ring to be cleaned
2000 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2001 struct e1000_tx_ring *tx_ring)
2003 struct e1000_hw *hw = &adapter->hw;
2004 struct e1000_tx_buffer *buffer_info;
2008 /* Free all the Tx ring sk_buffs */
2010 for (i = 0; i < tx_ring->count; i++) {
2011 buffer_info = &tx_ring->buffer_info[i];
2012 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2015 netdev_reset_queue(adapter->netdev);
2016 size = sizeof(struct e1000_tx_buffer) * tx_ring->count;
2017 memset(tx_ring->buffer_info, 0, size);
2019 /* Zero out the descriptor ring */
2021 memset(tx_ring->desc, 0, tx_ring->size);
2023 tx_ring->next_to_use = 0;
2024 tx_ring->next_to_clean = 0;
2025 tx_ring->last_tx_tso = false;
2027 writel(0, hw->hw_addr + tx_ring->tdh);
2028 writel(0, hw->hw_addr + tx_ring->tdt);
2032 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2033 * @adapter: board private structure
2035 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2039 for (i = 0; i < adapter->num_tx_queues; i++)
2040 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2044 * e1000_free_rx_resources - Free Rx Resources
2045 * @adapter: board private structure
2046 * @rx_ring: ring to clean the resources from
2048 * Free all receive software resources
2050 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2051 struct e1000_rx_ring *rx_ring)
2053 struct pci_dev *pdev = adapter->pdev;
2055 e1000_clean_rx_ring(adapter, rx_ring);
2057 vfree(rx_ring->buffer_info);
2058 rx_ring->buffer_info = NULL;
2060 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2063 rx_ring->desc = NULL;
2067 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2068 * @adapter: board private structure
2070 * Free all receive software resources
2072 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2076 for (i = 0; i < adapter->num_rx_queues; i++)
2077 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2080 #define E1000_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN)
2081 static unsigned int e1000_frag_len(const struct e1000_adapter *a)
2083 return SKB_DATA_ALIGN(a->rx_buffer_len + E1000_HEADROOM) +
2084 SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
2087 static void *e1000_alloc_frag(const struct e1000_adapter *a)
2089 unsigned int len = e1000_frag_len(a);
2090 u8 *data = netdev_alloc_frag(len);
2093 data += E1000_HEADROOM;
2098 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2099 * @adapter: board private structure
2100 * @rx_ring: ring to free buffers from
2102 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2103 struct e1000_rx_ring *rx_ring)
2105 struct e1000_hw *hw = &adapter->hw;
2106 struct e1000_rx_buffer *buffer_info;
2107 struct pci_dev *pdev = adapter->pdev;
2111 /* Free all the Rx netfrags */
2112 for (i = 0; i < rx_ring->count; i++) {
2113 buffer_info = &rx_ring->buffer_info[i];
2114 if (adapter->clean_rx == e1000_clean_rx_irq) {
2115 if (buffer_info->dma)
2116 dma_unmap_single(&pdev->dev, buffer_info->dma,
2117 adapter->rx_buffer_len,
2119 if (buffer_info->rxbuf.data) {
2120 skb_free_frag(buffer_info->rxbuf.data);
2121 buffer_info->rxbuf.data = NULL;
2123 } else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2124 if (buffer_info->dma)
2125 dma_unmap_page(&pdev->dev, buffer_info->dma,
2126 adapter->rx_buffer_len,
2128 if (buffer_info->rxbuf.page) {
2129 put_page(buffer_info->rxbuf.page);
2130 buffer_info->rxbuf.page = NULL;
2134 buffer_info->dma = 0;
2137 /* there also may be some cached data from a chained receive */
2138 napi_free_frags(&adapter->napi);
2139 rx_ring->rx_skb_top = NULL;
2141 size = sizeof(struct e1000_rx_buffer) * rx_ring->count;
2142 memset(rx_ring->buffer_info, 0, size);
2144 /* Zero out the descriptor ring */
2145 memset(rx_ring->desc, 0, rx_ring->size);
2147 rx_ring->next_to_clean = 0;
2148 rx_ring->next_to_use = 0;
2150 writel(0, hw->hw_addr + rx_ring->rdh);
2151 writel(0, hw->hw_addr + rx_ring->rdt);
2155 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2156 * @adapter: board private structure
2158 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2162 for (i = 0; i < adapter->num_rx_queues; i++)
2163 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2166 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2167 * and memory write and invalidate disabled for certain operations
2169 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2171 struct e1000_hw *hw = &adapter->hw;
2172 struct net_device *netdev = adapter->netdev;
2175 e1000_pci_clear_mwi(hw);
2178 rctl |= E1000_RCTL_RST;
2180 E1000_WRITE_FLUSH();
2183 if (netif_running(netdev))
2184 e1000_clean_all_rx_rings(adapter);
2187 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2189 struct e1000_hw *hw = &adapter->hw;
2190 struct net_device *netdev = adapter->netdev;
2194 rctl &= ~E1000_RCTL_RST;
2196 E1000_WRITE_FLUSH();
2199 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2200 e1000_pci_set_mwi(hw);
2202 if (netif_running(netdev)) {
2203 /* No need to loop, because 82542 supports only 1 queue */
2204 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2205 e1000_configure_rx(adapter);
2206 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2211 * e1000_set_mac - Change the Ethernet Address of the NIC
2212 * @netdev: network interface device structure
2213 * @p: pointer to an address structure
2215 * Returns 0 on success, negative on failure
2217 static int e1000_set_mac(struct net_device *netdev, void *p)
2219 struct e1000_adapter *adapter = netdev_priv(netdev);
2220 struct e1000_hw *hw = &adapter->hw;
2221 struct sockaddr *addr = p;
2223 if (!is_valid_ether_addr(addr->sa_data))
2224 return -EADDRNOTAVAIL;
2226 /* 82542 2.0 needs to be in reset to write receive address registers */
2228 if (hw->mac_type == e1000_82542_rev2_0)
2229 e1000_enter_82542_rst(adapter);
2231 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2232 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2234 e1000_rar_set(hw, hw->mac_addr, 0);
2236 if (hw->mac_type == e1000_82542_rev2_0)
2237 e1000_leave_82542_rst(adapter);
2243 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2244 * @netdev: network interface device structure
2246 * The set_rx_mode entry point is called whenever the unicast or multicast
2247 * address lists or the network interface flags are updated. This routine is
2248 * responsible for configuring the hardware for proper unicast, multicast,
2249 * promiscuous mode, and all-multi behavior.
2251 static void e1000_set_rx_mode(struct net_device *netdev)
2253 struct e1000_adapter *adapter = netdev_priv(netdev);
2254 struct e1000_hw *hw = &adapter->hw;
2255 struct netdev_hw_addr *ha;
2256 bool use_uc = false;
2259 int i, rar_entries = E1000_RAR_ENTRIES;
2260 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2261 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2266 /* Check for Promiscuous and All Multicast modes */
2270 if (netdev->flags & IFF_PROMISC) {
2271 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2272 rctl &= ~E1000_RCTL_VFE;
2274 if (netdev->flags & IFF_ALLMULTI)
2275 rctl |= E1000_RCTL_MPE;
2277 rctl &= ~E1000_RCTL_MPE;
2278 /* Enable VLAN filter if there is a VLAN */
2279 if (e1000_vlan_used(adapter))
2280 rctl |= E1000_RCTL_VFE;
2283 if (netdev_uc_count(netdev) > rar_entries - 1) {
2284 rctl |= E1000_RCTL_UPE;
2285 } else if (!(netdev->flags & IFF_PROMISC)) {
2286 rctl &= ~E1000_RCTL_UPE;
2292 /* 82542 2.0 needs to be in reset to write receive address registers */
2294 if (hw->mac_type == e1000_82542_rev2_0)
2295 e1000_enter_82542_rst(adapter);
2297 /* load the first 14 addresses into the exact filters 1-14. Unicast
2298 * addresses take precedence to avoid disabling unicast filtering
2301 * RAR 0 is used for the station MAC address
2302 * if there are not 14 addresses, go ahead and clear the filters
2306 netdev_for_each_uc_addr(ha, netdev) {
2307 if (i == rar_entries)
2309 e1000_rar_set(hw, ha->addr, i++);
2312 netdev_for_each_mc_addr(ha, netdev) {
2313 if (i == rar_entries) {
2314 /* load any remaining addresses into the hash table */
2315 u32 hash_reg, hash_bit, mta;
2316 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2317 hash_reg = (hash_value >> 5) & 0x7F;
2318 hash_bit = hash_value & 0x1F;
2319 mta = (1 << hash_bit);
2320 mcarray[hash_reg] |= mta;
2322 e1000_rar_set(hw, ha->addr, i++);
2326 for (; i < rar_entries; i++) {
2327 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2328 E1000_WRITE_FLUSH();
2329 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2330 E1000_WRITE_FLUSH();
2333 /* write the hash table completely, write from bottom to avoid
2334 * both stupid write combining chipsets, and flushing each write
2336 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2337 /* If we are on an 82544 has an errata where writing odd
2338 * offsets overwrites the previous even offset, but writing
2339 * backwards over the range solves the issue by always
2340 * writing the odd offset first
2342 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2344 E1000_WRITE_FLUSH();
2346 if (hw->mac_type == e1000_82542_rev2_0)
2347 e1000_leave_82542_rst(adapter);
2353 * e1000_update_phy_info_task - get phy info
2354 * @work: work struct contained inside adapter struct
2356 * Need to wait a few seconds after link up to get diagnostic information from
2359 static void e1000_update_phy_info_task(struct work_struct *work)
2361 struct e1000_adapter *adapter = container_of(work,
2362 struct e1000_adapter,
2363 phy_info_task.work);
2365 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2369 * e1000_82547_tx_fifo_stall_task - task to complete work
2370 * @work: work struct contained inside adapter struct
2372 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2374 struct e1000_adapter *adapter = container_of(work,
2375 struct e1000_adapter,
2376 fifo_stall_task.work);
2377 struct e1000_hw *hw = &adapter->hw;
2378 struct net_device *netdev = adapter->netdev;
2381 if (atomic_read(&adapter->tx_fifo_stall)) {
2382 if ((er32(TDT) == er32(TDH)) &&
2383 (er32(TDFT) == er32(TDFH)) &&
2384 (er32(TDFTS) == er32(TDFHS))) {
2386 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2387 ew32(TDFT, adapter->tx_head_addr);
2388 ew32(TDFH, adapter->tx_head_addr);
2389 ew32(TDFTS, adapter->tx_head_addr);
2390 ew32(TDFHS, adapter->tx_head_addr);
2392 E1000_WRITE_FLUSH();
2394 adapter->tx_fifo_head = 0;
2395 atomic_set(&adapter->tx_fifo_stall, 0);
2396 netif_wake_queue(netdev);
2397 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2398 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2403 bool e1000_has_link(struct e1000_adapter *adapter)
2405 struct e1000_hw *hw = &adapter->hw;
2406 bool link_active = false;
2408 /* get_link_status is set on LSC (link status) interrupt or rx
2409 * sequence error interrupt (except on intel ce4100).
2410 * get_link_status will stay false until the
2411 * e1000_check_for_link establishes link for copper adapters
2414 switch (hw->media_type) {
2415 case e1000_media_type_copper:
2416 if (hw->mac_type == e1000_ce4100)
2417 hw->get_link_status = 1;
2418 if (hw->get_link_status) {
2419 e1000_check_for_link(hw);
2420 link_active = !hw->get_link_status;
2425 case e1000_media_type_fiber:
2426 e1000_check_for_link(hw);
2427 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2429 case e1000_media_type_internal_serdes:
2430 e1000_check_for_link(hw);
2431 link_active = hw->serdes_has_link;
2441 * e1000_watchdog - work function
2442 * @work: work struct contained inside adapter struct
2444 static void e1000_watchdog(struct work_struct *work)
2446 struct e1000_adapter *adapter = container_of(work,
2447 struct e1000_adapter,
2448 watchdog_task.work);
2449 struct e1000_hw *hw = &adapter->hw;
2450 struct net_device *netdev = adapter->netdev;
2451 struct e1000_tx_ring *txdr = adapter->tx_ring;
2454 link = e1000_has_link(adapter);
2455 if ((netif_carrier_ok(netdev)) && link)
2459 if (!netif_carrier_ok(netdev)) {
2462 /* update snapshot of PHY registers on LSC */
2463 e1000_get_speed_and_duplex(hw,
2464 &adapter->link_speed,
2465 &adapter->link_duplex);
2468 pr_info("%s NIC Link is Up %d Mbps %s, "
2469 "Flow Control: %s\n",
2471 adapter->link_speed,
2472 adapter->link_duplex == FULL_DUPLEX ?
2473 "Full Duplex" : "Half Duplex",
2474 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2475 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2476 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2477 E1000_CTRL_TFCE) ? "TX" : "None")));
2479 /* adjust timeout factor according to speed/duplex */
2480 adapter->tx_timeout_factor = 1;
2481 switch (adapter->link_speed) {
2484 adapter->tx_timeout_factor = 16;
2488 /* maybe add some timeout factor ? */
2492 /* enable transmits in the hardware */
2494 tctl |= E1000_TCTL_EN;
2497 netif_carrier_on(netdev);
2498 if (!test_bit(__E1000_DOWN, &adapter->flags))
2499 schedule_delayed_work(&adapter->phy_info_task,
2501 adapter->smartspeed = 0;
2504 if (netif_carrier_ok(netdev)) {
2505 adapter->link_speed = 0;
2506 adapter->link_duplex = 0;
2507 pr_info("%s NIC Link is Down\n",
2509 netif_carrier_off(netdev);
2511 if (!test_bit(__E1000_DOWN, &adapter->flags))
2512 schedule_delayed_work(&adapter->phy_info_task,
2516 e1000_smartspeed(adapter);
2520 e1000_update_stats(adapter);
2522 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2523 adapter->tpt_old = adapter->stats.tpt;
2524 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2525 adapter->colc_old = adapter->stats.colc;
2527 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2528 adapter->gorcl_old = adapter->stats.gorcl;
2529 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2530 adapter->gotcl_old = adapter->stats.gotcl;
2532 e1000_update_adaptive(hw);
2534 if (!netif_carrier_ok(netdev)) {
2535 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2536 /* We've lost link, so the controller stops DMA,
2537 * but we've got queued Tx work that's never going
2538 * to get done, so reset controller to flush Tx.
2539 * (Do the reset outside of interrupt context).
2541 adapter->tx_timeout_count++;
2542 schedule_work(&adapter->reset_task);
2543 /* exit immediately since reset is imminent */
2548 /* Simple mode for Interrupt Throttle Rate (ITR) */
2549 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2550 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2551 * Total asymmetrical Tx or Rx gets ITR=8000;
2552 * everyone else is between 2000-8000.
2554 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2555 u32 dif = (adapter->gotcl > adapter->gorcl ?
2556 adapter->gotcl - adapter->gorcl :
2557 adapter->gorcl - adapter->gotcl) / 10000;
2558 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2560 ew32(ITR, 1000000000 / (itr * 256));
2563 /* Cause software interrupt to ensure rx ring is cleaned */
2564 ew32(ICS, E1000_ICS_RXDMT0);
2566 /* Force detection of hung controller every watchdog period */
2567 adapter->detect_tx_hung = true;
2569 /* Reschedule the task */
2570 if (!test_bit(__E1000_DOWN, &adapter->flags))
2571 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2574 enum latency_range {
2578 latency_invalid = 255
2582 * e1000_update_itr - update the dynamic ITR value based on statistics
2583 * @adapter: pointer to adapter
2584 * @itr_setting: current adapter->itr
2585 * @packets: the number of packets during this measurement interval
2586 * @bytes: the number of bytes during this measurement interval
2588 * Stores a new ITR value based on packets and byte
2589 * counts during the last interrupt. The advantage of per interrupt
2590 * computation is faster updates and more accurate ITR for the current
2591 * traffic pattern. Constants in this function were computed
2592 * based on theoretical maximum wire speed and thresholds were set based
2593 * on testing data as well as attempting to minimize response time
2594 * while increasing bulk throughput.
2595 * this functionality is controlled by the InterruptThrottleRate module
2596 * parameter (see e1000_param.c)
2598 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2599 u16 itr_setting, int packets, int bytes)
2601 unsigned int retval = itr_setting;
2602 struct e1000_hw *hw = &adapter->hw;
2604 if (unlikely(hw->mac_type < e1000_82540))
2605 goto update_itr_done;
2608 goto update_itr_done;
2610 switch (itr_setting) {
2611 case lowest_latency:
2612 /* jumbo frames get bulk treatment*/
2613 if (bytes/packets > 8000)
2614 retval = bulk_latency;
2615 else if ((packets < 5) && (bytes > 512))
2616 retval = low_latency;
2618 case low_latency: /* 50 usec aka 20000 ints/s */
2619 if (bytes > 10000) {
2620 /* jumbo frames need bulk latency setting */
2621 if (bytes/packets > 8000)
2622 retval = bulk_latency;
2623 else if ((packets < 10) || ((bytes/packets) > 1200))
2624 retval = bulk_latency;
2625 else if ((packets > 35))
2626 retval = lowest_latency;
2627 } else if (bytes/packets > 2000)
2628 retval = bulk_latency;
2629 else if (packets <= 2 && bytes < 512)
2630 retval = lowest_latency;
2632 case bulk_latency: /* 250 usec aka 4000 ints/s */
2633 if (bytes > 25000) {
2635 retval = low_latency;
2636 } else if (bytes < 6000) {
2637 retval = low_latency;
2646 static void e1000_set_itr(struct e1000_adapter *adapter)
2648 struct e1000_hw *hw = &adapter->hw;
2650 u32 new_itr = adapter->itr;
2652 if (unlikely(hw->mac_type < e1000_82540))
2655 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2656 if (unlikely(adapter->link_speed != SPEED_1000)) {
2662 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr,
2663 adapter->total_tx_packets,
2664 adapter->total_tx_bytes);
2665 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2666 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2667 adapter->tx_itr = low_latency;
2669 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr,
2670 adapter->total_rx_packets,
2671 adapter->total_rx_bytes);
2672 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2673 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2674 adapter->rx_itr = low_latency;
2676 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2678 switch (current_itr) {
2679 /* counts and packets in update_itr are dependent on these numbers */
2680 case lowest_latency:
2684 new_itr = 20000; /* aka hwitr = ~200 */
2694 if (new_itr != adapter->itr) {
2695 /* this attempts to bias the interrupt rate towards Bulk
2696 * by adding intermediate steps when interrupt rate is
2699 new_itr = new_itr > adapter->itr ?
2700 min(adapter->itr + (new_itr >> 2), new_itr) :
2702 adapter->itr = new_itr;
2703 ew32(ITR, 1000000000 / (new_itr * 256));
2707 #define E1000_TX_FLAGS_CSUM 0x00000001
2708 #define E1000_TX_FLAGS_VLAN 0x00000002
2709 #define E1000_TX_FLAGS_TSO 0x00000004
2710 #define E1000_TX_FLAGS_IPV4 0x00000008
2711 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2712 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2713 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2715 static int e1000_tso(struct e1000_adapter *adapter,
2716 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2719 struct e1000_context_desc *context_desc;
2720 struct e1000_tx_buffer *buffer_info;
2723 u16 ipcse = 0, tucse, mss;
2724 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2726 if (skb_is_gso(skb)) {
2729 err = skb_cow_head(skb, 0);
2733 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2734 mss = skb_shinfo(skb)->gso_size;
2735 if (protocol == htons(ETH_P_IP)) {
2736 struct iphdr *iph = ip_hdr(skb);
2739 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2743 cmd_length = E1000_TXD_CMD_IP;
2744 ipcse = skb_transport_offset(skb) - 1;
2745 } else if (skb_is_gso_v6(skb)) {
2746 ipv6_hdr(skb)->payload_len = 0;
2747 tcp_hdr(skb)->check =
2748 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2749 &ipv6_hdr(skb)->daddr,
2753 ipcss = skb_network_offset(skb);
2754 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2755 tucss = skb_transport_offset(skb);
2756 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2759 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2760 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2762 i = tx_ring->next_to_use;
2763 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2764 buffer_info = &tx_ring->buffer_info[i];
2766 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2767 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2768 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2769 context_desc->upper_setup.tcp_fields.tucss = tucss;
2770 context_desc->upper_setup.tcp_fields.tucso = tucso;
2771 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2772 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2773 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2774 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2776 buffer_info->time_stamp = jiffies;
2777 buffer_info->next_to_watch = i;
2779 if (++i == tx_ring->count)
2782 tx_ring->next_to_use = i;
2789 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2790 struct e1000_tx_ring *tx_ring, struct sk_buff *skb,
2793 struct e1000_context_desc *context_desc;
2794 struct e1000_tx_buffer *buffer_info;
2797 u32 cmd_len = E1000_TXD_CMD_DEXT;
2799 if (skb->ip_summed != CHECKSUM_PARTIAL)
2803 case cpu_to_be16(ETH_P_IP):
2804 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2805 cmd_len |= E1000_TXD_CMD_TCP;
2807 case cpu_to_be16(ETH_P_IPV6):
2808 /* XXX not handling all IPV6 headers */
2809 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2810 cmd_len |= E1000_TXD_CMD_TCP;
2813 if (unlikely(net_ratelimit()))
2814 e_warn(drv, "checksum_partial proto=%x!\n",
2819 css = skb_checksum_start_offset(skb);
2821 i = tx_ring->next_to_use;
2822 buffer_info = &tx_ring->buffer_info[i];
2823 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2825 context_desc->lower_setup.ip_config = 0;
2826 context_desc->upper_setup.tcp_fields.tucss = css;
2827 context_desc->upper_setup.tcp_fields.tucso =
2828 css + skb->csum_offset;
2829 context_desc->upper_setup.tcp_fields.tucse = 0;
2830 context_desc->tcp_seg_setup.data = 0;
2831 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2833 buffer_info->time_stamp = jiffies;
2834 buffer_info->next_to_watch = i;
2836 if (unlikely(++i == tx_ring->count))
2839 tx_ring->next_to_use = i;
2844 #define E1000_MAX_TXD_PWR 12
2845 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2847 static int e1000_tx_map(struct e1000_adapter *adapter,
2848 struct e1000_tx_ring *tx_ring,
2849 struct sk_buff *skb, unsigned int first,
2850 unsigned int max_per_txd, unsigned int nr_frags,
2853 struct e1000_hw *hw = &adapter->hw;
2854 struct pci_dev *pdev = adapter->pdev;
2855 struct e1000_tx_buffer *buffer_info;
2856 unsigned int len = skb_headlen(skb);
2857 unsigned int offset = 0, size, count = 0, i;
2858 unsigned int f, bytecount, segs;
2860 i = tx_ring->next_to_use;
2863 buffer_info = &tx_ring->buffer_info[i];
2864 size = min(len, max_per_txd);
2865 /* Workaround for Controller erratum --
2866 * descriptor for non-tso packet in a linear SKB that follows a
2867 * tso gets written back prematurely before the data is fully
2868 * DMA'd to the controller
2870 if (!skb->data_len && tx_ring->last_tx_tso &&
2872 tx_ring->last_tx_tso = false;
2876 /* Workaround for premature desc write-backs
2877 * in TSO mode. Append 4-byte sentinel desc
2879 if (unlikely(mss && !nr_frags && size == len && size > 8))
2881 /* work-around for errata 10 and it applies
2882 * to all controllers in PCI-X mode
2883 * The fix is to make sure that the first descriptor of a
2884 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2886 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2887 (size > 2015) && count == 0))
2890 /* Workaround for potential 82544 hang in PCI-X. Avoid
2891 * terminating buffers within evenly-aligned dwords.
2893 if (unlikely(adapter->pcix_82544 &&
2894 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2898 buffer_info->length = size;
2899 /* set time_stamp *before* dma to help avoid a possible race */
2900 buffer_info->time_stamp = jiffies;
2901 buffer_info->mapped_as_page = false;
2902 buffer_info->dma = dma_map_single(&pdev->dev,
2904 size, DMA_TO_DEVICE);
2905 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2907 buffer_info->next_to_watch = i;
2914 if (unlikely(i == tx_ring->count))
2919 for (f = 0; f < nr_frags; f++) {
2920 const struct skb_frag_struct *frag;
2922 frag = &skb_shinfo(skb)->frags[f];
2923 len = skb_frag_size(frag);
2927 unsigned long bufend;
2929 if (unlikely(i == tx_ring->count))
2932 buffer_info = &tx_ring->buffer_info[i];
2933 size = min(len, max_per_txd);
2934 /* Workaround for premature desc write-backs
2935 * in TSO mode. Append 4-byte sentinel desc
2937 if (unlikely(mss && f == (nr_frags-1) &&
2938 size == len && size > 8))
2940 /* Workaround for potential 82544 hang in PCI-X.
2941 * Avoid terminating buffers within evenly-aligned
2944 bufend = (unsigned long)
2945 page_to_phys(skb_frag_page(frag));
2946 bufend += offset + size - 1;
2947 if (unlikely(adapter->pcix_82544 &&
2952 buffer_info->length = size;
2953 buffer_info->time_stamp = jiffies;
2954 buffer_info->mapped_as_page = true;
2955 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2956 offset, size, DMA_TO_DEVICE);
2957 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2959 buffer_info->next_to_watch = i;
2967 segs = skb_shinfo(skb)->gso_segs ?: 1;
2968 /* multiply data chunks by size of headers */
2969 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2971 tx_ring->buffer_info[i].skb = skb;
2972 tx_ring->buffer_info[i].segs = segs;
2973 tx_ring->buffer_info[i].bytecount = bytecount;
2974 tx_ring->buffer_info[first].next_to_watch = i;
2979 dev_err(&pdev->dev, "TX DMA map failed\n");
2980 buffer_info->dma = 0;
2986 i += tx_ring->count;
2988 buffer_info = &tx_ring->buffer_info[i];
2989 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2995 static void e1000_tx_queue(struct e1000_adapter *adapter,
2996 struct e1000_tx_ring *tx_ring, int tx_flags,
2999 struct e1000_tx_desc *tx_desc = NULL;
3000 struct e1000_tx_buffer *buffer_info;
3001 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3004 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3005 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3007 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3009 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3010 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3013 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3014 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3015 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3018 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3019 txd_lower |= E1000_TXD_CMD_VLE;
3020 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3023 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3024 txd_lower &= ~(E1000_TXD_CMD_IFCS);
3026 i = tx_ring->next_to_use;
3029 buffer_info = &tx_ring->buffer_info[i];
3030 tx_desc = E1000_TX_DESC(*tx_ring, i);
3031 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3032 tx_desc->lower.data =
3033 cpu_to_le32(txd_lower | buffer_info->length);
3034 tx_desc->upper.data = cpu_to_le32(txd_upper);
3035 if (unlikely(++i == tx_ring->count))
3039 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3041 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3042 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
3043 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
3045 /* Force memory writes to complete before letting h/w
3046 * know there are new descriptors to fetch. (Only
3047 * applicable for weak-ordered memory model archs,
3052 tx_ring->next_to_use = i;
3055 /* 82547 workaround to avoid controller hang in half-duplex environment.
3056 * The workaround is to avoid queuing a large packet that would span
3057 * the internal Tx FIFO ring boundary by notifying the stack to resend
3058 * the packet at a later time. This gives the Tx FIFO an opportunity to
3059 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3060 * to the beginning of the Tx FIFO.
3063 #define E1000_FIFO_HDR 0x10
3064 #define E1000_82547_PAD_LEN 0x3E0
3066 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3067 struct sk_buff *skb)
3069 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3070 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3072 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3074 if (adapter->link_duplex != HALF_DUPLEX)
3075 goto no_fifo_stall_required;
3077 if (atomic_read(&adapter->tx_fifo_stall))
3080 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3081 atomic_set(&adapter->tx_fifo_stall, 1);
3085 no_fifo_stall_required:
3086 adapter->tx_fifo_head += skb_fifo_len;
3087 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3088 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3092 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3094 struct e1000_adapter *adapter = netdev_priv(netdev);
3095 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3097 netif_stop_queue(netdev);
3098 /* Herbert's original patch had:
3099 * smp_mb__after_netif_stop_queue();
3100 * but since that doesn't exist yet, just open code it.
3104 /* We need to check again in a case another CPU has just
3105 * made room available.
3107 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3111 netif_start_queue(netdev);
3112 ++adapter->restart_queue;
3116 static int e1000_maybe_stop_tx(struct net_device *netdev,
3117 struct e1000_tx_ring *tx_ring, int size)
3119 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3121 return __e1000_maybe_stop_tx(netdev, size);
3124 #define TXD_USE_COUNT(S, X) (((S) + ((1 << (X)) - 1)) >> (X))
3125 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3126 struct net_device *netdev)
3128 struct e1000_adapter *adapter = netdev_priv(netdev);
3129 struct e1000_hw *hw = &adapter->hw;
3130 struct e1000_tx_ring *tx_ring;
3131 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3132 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3133 unsigned int tx_flags = 0;
3134 unsigned int len = skb_headlen(skb);
3135 unsigned int nr_frags;
3140 __be16 protocol = vlan_get_protocol(skb);
3142 /* This goes back to the question of how to logically map a Tx queue
3143 * to a flow. Right now, performance is impacted slightly negatively
3144 * if using multiple Tx queues. If the stack breaks away from a
3145 * single qdisc implementation, we can look at this again.
3147 tx_ring = adapter->tx_ring;
3149 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3150 * packets may get corrupted during padding by HW.
3151 * To WA this issue, pad all small packets manually.
3153 if (eth_skb_pad(skb))
3154 return NETDEV_TX_OK;
3156 mss = skb_shinfo(skb)->gso_size;
3157 /* The controller does a simple calculation to
3158 * make sure there is enough room in the FIFO before
3159 * initiating the DMA for each buffer. The calc is:
3160 * 4 = ceil(buffer len/mss). To make sure we don't
3161 * overrun the FIFO, adjust the max buffer len if mss
3166 max_per_txd = min(mss << 2, max_per_txd);
3167 max_txd_pwr = fls(max_per_txd) - 1;
3169 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3170 if (skb->data_len && hdr_len == len) {
3171 switch (hw->mac_type) {
3172 unsigned int pull_size;
3174 /* Make sure we have room to chop off 4 bytes,
3175 * and that the end alignment will work out to
3176 * this hardware's requirements
3177 * NOTE: this is a TSO only workaround
3178 * if end byte alignment not correct move us
3179 * into the next dword
3181 if ((unsigned long)(skb_tail_pointer(skb) - 1)
3185 pull_size = min((unsigned int)4, skb->data_len);
3186 if (!__pskb_pull_tail(skb, pull_size)) {
3187 e_err(drv, "__pskb_pull_tail "
3189 dev_kfree_skb_any(skb);
3190 return NETDEV_TX_OK;
3192 len = skb_headlen(skb);
3201 /* reserve a descriptor for the offload context */
3202 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3206 /* Controller Erratum workaround */
3207 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3210 count += TXD_USE_COUNT(len, max_txd_pwr);
3212 if (adapter->pcix_82544)
3215 /* work-around for errata 10 and it applies to all controllers
3216 * in PCI-X mode, so add one more descriptor to the count
3218 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3222 nr_frags = skb_shinfo(skb)->nr_frags;
3223 for (f = 0; f < nr_frags; f++)
3224 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3226 if (adapter->pcix_82544)
3229 /* need: count + 2 desc gap to keep tail from touching
3230 * head, otherwise try next time
3232 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3233 return NETDEV_TX_BUSY;
3235 if (unlikely((hw->mac_type == e1000_82547) &&
3236 (e1000_82547_fifo_workaround(adapter, skb)))) {
3237 netif_stop_queue(netdev);
3238 if (!test_bit(__E1000_DOWN, &adapter->flags))
3239 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3240 return NETDEV_TX_BUSY;
3243 if (skb_vlan_tag_present(skb)) {
3244 tx_flags |= E1000_TX_FLAGS_VLAN;
3245 tx_flags |= (skb_vlan_tag_get(skb) <<
3246 E1000_TX_FLAGS_VLAN_SHIFT);
3249 first = tx_ring->next_to_use;
3251 tso = e1000_tso(adapter, tx_ring, skb, protocol);
3253 dev_kfree_skb_any(skb);
3254 return NETDEV_TX_OK;
3258 if (likely(hw->mac_type != e1000_82544))
3259 tx_ring->last_tx_tso = true;
3260 tx_flags |= E1000_TX_FLAGS_TSO;
3261 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb, protocol)))
3262 tx_flags |= E1000_TX_FLAGS_CSUM;
3264 if (protocol == htons(ETH_P_IP))
3265 tx_flags |= E1000_TX_FLAGS_IPV4;
3267 if (unlikely(skb->no_fcs))
3268 tx_flags |= E1000_TX_FLAGS_NO_FCS;
3270 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3274 /* The descriptors needed is higher than other Intel drivers
3275 * due to a number of workarounds. The breakdown is below:
3276 * Data descriptors: MAX_SKB_FRAGS + 1
3277 * Context Descriptor: 1
3278 * Keep head from touching tail: 2
3281 int desc_needed = MAX_SKB_FRAGS + 7;
3283 netdev_sent_queue(netdev, skb->len);
3284 skb_tx_timestamp(skb);
3286 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3288 /* 82544 potentially requires twice as many data descriptors
3289 * in order to guarantee buffers don't end on evenly-aligned
3292 if (adapter->pcix_82544)
3293 desc_needed += MAX_SKB_FRAGS + 1;
3295 /* Make sure there is space in the ring for the next send. */
3296 e1000_maybe_stop_tx(netdev, tx_ring, desc_needed);
3298 if (!skb->xmit_more ||
3299 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) {
3300 writel(tx_ring->next_to_use, hw->hw_addr + tx_ring->tdt);
3301 /* we need this if more than one processor can write to
3302 * our tail at a time, it synchronizes IO on IA64/Altix
3308 dev_kfree_skb_any(skb);
3309 tx_ring->buffer_info[first].time_stamp = 0;
3310 tx_ring->next_to_use = first;
3313 return NETDEV_TX_OK;
3316 #define NUM_REGS 38 /* 1 based count */
3317 static void e1000_regdump(struct e1000_adapter *adapter)
3319 struct e1000_hw *hw = &adapter->hw;
3321 u32 *regs_buff = regs;
3324 static const char * const reg_name[] = {
3326 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3327 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3328 "TIDV", "TXDCTL", "TADV", "TARC0",
3329 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3331 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3332 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3333 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3336 regs_buff[0] = er32(CTRL);
3337 regs_buff[1] = er32(STATUS);
3339 regs_buff[2] = er32(RCTL);
3340 regs_buff[3] = er32(RDLEN);
3341 regs_buff[4] = er32(RDH);
3342 regs_buff[5] = er32(RDT);
3343 regs_buff[6] = er32(RDTR);
3345 regs_buff[7] = er32(TCTL);
3346 regs_buff[8] = er32(TDBAL);
3347 regs_buff[9] = er32(TDBAH);
3348 regs_buff[10] = er32(TDLEN);
3349 regs_buff[11] = er32(TDH);
3350 regs_buff[12] = er32(TDT);
3351 regs_buff[13] = er32(TIDV);
3352 regs_buff[14] = er32(TXDCTL);
3353 regs_buff[15] = er32(TADV);
3354 regs_buff[16] = er32(TARC0);
3356 regs_buff[17] = er32(TDBAL1);
3357 regs_buff[18] = er32(TDBAH1);
3358 regs_buff[19] = er32(TDLEN1);
3359 regs_buff[20] = er32(TDH1);
3360 regs_buff[21] = er32(TDT1);
3361 regs_buff[22] = er32(TXDCTL1);
3362 regs_buff[23] = er32(TARC1);
3363 regs_buff[24] = er32(CTRL_EXT);
3364 regs_buff[25] = er32(ERT);
3365 regs_buff[26] = er32(RDBAL0);
3366 regs_buff[27] = er32(RDBAH0);
3367 regs_buff[28] = er32(TDFH);
3368 regs_buff[29] = er32(TDFT);
3369 regs_buff[30] = er32(TDFHS);
3370 regs_buff[31] = er32(TDFTS);
3371 regs_buff[32] = er32(TDFPC);
3372 regs_buff[33] = er32(RDFH);
3373 regs_buff[34] = er32(RDFT);
3374 regs_buff[35] = er32(RDFHS);
3375 regs_buff[36] = er32(RDFTS);
3376 regs_buff[37] = er32(RDFPC);
3378 pr_info("Register dump\n");
3379 for (i = 0; i < NUM_REGS; i++)
3380 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]);
3384 * e1000_dump: Print registers, tx ring and rx ring
3386 static void e1000_dump(struct e1000_adapter *adapter)
3388 /* this code doesn't handle multiple rings */
3389 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3390 struct e1000_rx_ring *rx_ring = adapter->rx_ring;
3393 if (!netif_msg_hw(adapter))
3396 /* Print Registers */
3397 e1000_regdump(adapter);
3400 pr_info("TX Desc ring0 dump\n");
3402 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3404 * Legacy Transmit Descriptor
3405 * +--------------------------------------------------------------+
3406 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3407 * +--------------------------------------------------------------+
3408 * 8 | Special | CSS | Status | CMD | CSO | Length |
3409 * +--------------------------------------------------------------+
3410 * 63 48 47 36 35 32 31 24 23 16 15 0
3412 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3413 * 63 48 47 40 39 32 31 16 15 8 7 0
3414 * +----------------------------------------------------------------+
3415 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3416 * +----------------------------------------------------------------+
3417 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3418 * +----------------------------------------------------------------+
3419 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3421 * Extended Data Descriptor (DTYP=0x1)
3422 * +----------------------------------------------------------------+
3423 * 0 | Buffer Address [63:0] |
3424 * +----------------------------------------------------------------+
3425 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3426 * +----------------------------------------------------------------+
3427 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3429 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3430 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3432 if (!netif_msg_tx_done(adapter))
3433 goto rx_ring_summary;
3435 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
3436 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i);
3437 struct e1000_tx_buffer *buffer_info = &tx_ring->buffer_info[i];
3438 struct my_u { __le64 a; __le64 b; };
3439 struct my_u *u = (struct my_u *)tx_desc;
3442 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
3444 else if (i == tx_ring->next_to_use)
3446 else if (i == tx_ring->next_to_clean)
3451 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3452 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i,
3453 le64_to_cpu(u->a), le64_to_cpu(u->b),
3454 (u64)buffer_info->dma, buffer_info->length,
3455 buffer_info->next_to_watch,
3456 (u64)buffer_info->time_stamp, buffer_info->skb, type);
3461 pr_info("\nRX Desc ring dump\n");
3463 /* Legacy Receive Descriptor Format
3465 * +-----------------------------------------------------+
3466 * | Buffer Address [63:0] |
3467 * +-----------------------------------------------------+
3468 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3469 * +-----------------------------------------------------+
3470 * 63 48 47 40 39 32 31 16 15 0
3472 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3474 if (!netif_msg_rx_status(adapter))
3477 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
3478 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i);
3479 struct e1000_rx_buffer *buffer_info = &rx_ring->buffer_info[i];
3480 struct my_u { __le64 a; __le64 b; };
3481 struct my_u *u = (struct my_u *)rx_desc;
3484 if (i == rx_ring->next_to_use)
3486 else if (i == rx_ring->next_to_clean)
3491 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3492 i, le64_to_cpu(u->a), le64_to_cpu(u->b),
3493 (u64)buffer_info->dma, buffer_info->rxbuf.data, type);
3496 /* dump the descriptor caches */
3498 pr_info("Rx descriptor cache in 64bit format\n");
3499 for (i = 0x6000; i <= 0x63FF ; i += 0x10) {
3500 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3502 readl(adapter->hw.hw_addr + i+4),
3503 readl(adapter->hw.hw_addr + i),
3504 readl(adapter->hw.hw_addr + i+12),
3505 readl(adapter->hw.hw_addr + i+8));
3508 pr_info("Tx descriptor cache in 64bit format\n");
3509 for (i = 0x7000; i <= 0x73FF ; i += 0x10) {
3510 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3512 readl(adapter->hw.hw_addr + i+4),
3513 readl(adapter->hw.hw_addr + i),
3514 readl(adapter->hw.hw_addr + i+12),
3515 readl(adapter->hw.hw_addr + i+8));
3522 * e1000_tx_timeout - Respond to a Tx Hang
3523 * @netdev: network interface device structure
3525 static void e1000_tx_timeout(struct net_device *netdev)
3527 struct e1000_adapter *adapter = netdev_priv(netdev);
3529 /* Do the reset outside of interrupt context */
3530 adapter->tx_timeout_count++;
3531 schedule_work(&adapter->reset_task);
3534 static void e1000_reset_task(struct work_struct *work)
3536 struct e1000_adapter *adapter =
3537 container_of(work, struct e1000_adapter, reset_task);
3539 e_err(drv, "Reset adapter\n");
3540 e1000_reinit_locked(adapter);
3544 * e1000_change_mtu - Change the Maximum Transfer Unit
3545 * @netdev: network interface device structure
3546 * @new_mtu: new value for maximum frame size
3548 * Returns 0 on success, negative on failure
3550 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3552 struct e1000_adapter *adapter = netdev_priv(netdev);
3553 struct e1000_hw *hw = &adapter->hw;
3554 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3556 /* Adapter-specific max frame size limits. */
3557 switch (hw->mac_type) {
3558 case e1000_undefined ... e1000_82542_rev2_1:
3559 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3560 e_err(probe, "Jumbo Frames not supported.\n");
3565 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3569 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3571 /* e1000_down has a dependency on max_frame_size */
3572 hw->max_frame_size = max_frame;
3573 if (netif_running(netdev)) {
3574 /* prevent buffers from being reallocated */
3575 adapter->alloc_rx_buf = e1000_alloc_dummy_rx_buffers;
3576 e1000_down(adapter);
3579 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3580 * means we reserve 2 more, this pushes us to allocate from the next
3582 * i.e. RXBUFFER_2048 --> size-4096 slab
3583 * however with the new *_jumbo_rx* routines, jumbo receives will use
3587 if (max_frame <= E1000_RXBUFFER_2048)
3588 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3590 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3591 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3592 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3593 adapter->rx_buffer_len = PAGE_SIZE;
3596 /* adjust allocation if LPE protects us, and we aren't using SBP */
3597 if (!hw->tbi_compatibility_on &&
3598 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3599 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3600 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3602 pr_info("%s changing MTU from %d to %d\n",
3603 netdev->name, netdev->mtu, new_mtu);
3604 netdev->mtu = new_mtu;
3606 if (netif_running(netdev))
3609 e1000_reset(adapter);
3611 clear_bit(__E1000_RESETTING, &adapter->flags);
3617 * e1000_update_stats - Update the board statistics counters
3618 * @adapter: board private structure
3620 void e1000_update_stats(struct e1000_adapter *adapter)
3622 struct net_device *netdev = adapter->netdev;
3623 struct e1000_hw *hw = &adapter->hw;
3624 struct pci_dev *pdev = adapter->pdev;
3625 unsigned long flags;
3628 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3630 /* Prevent stats update while adapter is being reset, or if the pci
3631 * connection is down.
3633 if (adapter->link_speed == 0)
3635 if (pci_channel_offline(pdev))
3638 spin_lock_irqsave(&adapter->stats_lock, flags);
3640 /* these counters are modified from e1000_tbi_adjust_stats,
3641 * called from the interrupt context, so they must only
3642 * be written while holding adapter->stats_lock
3645 adapter->stats.crcerrs += er32(CRCERRS);
3646 adapter->stats.gprc += er32(GPRC);
3647 adapter->stats.gorcl += er32(GORCL);
3648 adapter->stats.gorch += er32(GORCH);
3649 adapter->stats.bprc += er32(BPRC);
3650 adapter->stats.mprc += er32(MPRC);
3651 adapter->stats.roc += er32(ROC);
3653 adapter->stats.prc64 += er32(PRC64);
3654 adapter->stats.prc127 += er32(PRC127);
3655 adapter->stats.prc255 += er32(PRC255);
3656 adapter->stats.prc511 += er32(PRC511);
3657 adapter->stats.prc1023 += er32(PRC1023);
3658 adapter->stats.prc1522 += er32(PRC1522);
3660 adapter->stats.symerrs += er32(SYMERRS);
3661 adapter->stats.mpc += er32(MPC);
3662 adapter->stats.scc += er32(SCC);
3663 adapter->stats.ecol += er32(ECOL);
3664 adapter->stats.mcc += er32(MCC);
3665 adapter->stats.latecol += er32(LATECOL);
3666 adapter->stats.dc += er32(DC);
3667 adapter->stats.sec += er32(SEC);
3668 adapter->stats.rlec += er32(RLEC);
3669 adapter->stats.xonrxc += er32(XONRXC);
3670 adapter->stats.xontxc += er32(XONTXC);
3671 adapter->stats.xoffrxc += er32(XOFFRXC);
3672 adapter->stats.xofftxc += er32(XOFFTXC);
3673 adapter->stats.fcruc += er32(FCRUC);
3674 adapter->stats.gptc += er32(GPTC);
3675 adapter->stats.gotcl += er32(GOTCL);
3676 adapter->stats.gotch += er32(GOTCH);
3677 adapter->stats.rnbc += er32(RNBC);
3678 adapter->stats.ruc += er32(RUC);
3679 adapter->stats.rfc += er32(RFC);
3680 adapter->stats.rjc += er32(RJC);
3681 adapter->stats.torl += er32(TORL);
3682 adapter->stats.torh += er32(TORH);
3683 adapter->stats.totl += er32(TOTL);
3684 adapter->stats.toth += er32(TOTH);
3685 adapter->stats.tpr += er32(TPR);
3687 adapter->stats.ptc64 += er32(PTC64);
3688 adapter->stats.ptc127 += er32(PTC127);
3689 adapter->stats.ptc255 += er32(PTC255);
3690 adapter->stats.ptc511 += er32(PTC511);
3691 adapter->stats.ptc1023 += er32(PTC1023);
3692 adapter->stats.ptc1522 += er32(PTC1522);
3694 adapter->stats.mptc += er32(MPTC);
3695 adapter->stats.bptc += er32(BPTC);
3697 /* used for adaptive IFS */
3699 hw->tx_packet_delta = er32(TPT);
3700 adapter->stats.tpt += hw->tx_packet_delta;
3701 hw->collision_delta = er32(COLC);
3702 adapter->stats.colc += hw->collision_delta;
3704 if (hw->mac_type >= e1000_82543) {
3705 adapter->stats.algnerrc += er32(ALGNERRC);
3706 adapter->stats.rxerrc += er32(RXERRC);
3707 adapter->stats.tncrs += er32(TNCRS);
3708 adapter->stats.cexterr += er32(CEXTERR);
3709 adapter->stats.tsctc += er32(TSCTC);
3710 adapter->stats.tsctfc += er32(TSCTFC);
3713 /* Fill out the OS statistics structure */
3714 netdev->stats.multicast = adapter->stats.mprc;
3715 netdev->stats.collisions = adapter->stats.colc;
3719 /* RLEC on some newer hardware can be incorrect so build
3720 * our own version based on RUC and ROC
3722 netdev->stats.rx_errors = adapter->stats.rxerrc +
3723 adapter->stats.crcerrs + adapter->stats.algnerrc +
3724 adapter->stats.ruc + adapter->stats.roc +
3725 adapter->stats.cexterr;
3726 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3727 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3728 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3729 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3730 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3733 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3734 netdev->stats.tx_errors = adapter->stats.txerrc;
3735 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3736 netdev->stats.tx_window_errors = adapter->stats.latecol;
3737 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3738 if (hw->bad_tx_carr_stats_fd &&
3739 adapter->link_duplex == FULL_DUPLEX) {
3740 netdev->stats.tx_carrier_errors = 0;
3741 adapter->stats.tncrs = 0;
3744 /* Tx Dropped needs to be maintained elsewhere */
3747 if (hw->media_type == e1000_media_type_copper) {
3748 if ((adapter->link_speed == SPEED_1000) &&
3749 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3750 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3751 adapter->phy_stats.idle_errors += phy_tmp;
3754 if ((hw->mac_type <= e1000_82546) &&
3755 (hw->phy_type == e1000_phy_m88) &&
3756 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3757 adapter->phy_stats.receive_errors += phy_tmp;
3760 /* Management Stats */
3761 if (hw->has_smbus) {
3762 adapter->stats.mgptc += er32(MGTPTC);
3763 adapter->stats.mgprc += er32(MGTPRC);
3764 adapter->stats.mgpdc += er32(MGTPDC);
3767 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3771 * e1000_intr - Interrupt Handler
3772 * @irq: interrupt number
3773 * @data: pointer to a network interface device structure
3775 static irqreturn_t e1000_intr(int irq, void *data)
3777 struct net_device *netdev = data;
3778 struct e1000_adapter *adapter = netdev_priv(netdev);
3779 struct e1000_hw *hw = &adapter->hw;
3780 u32 icr = er32(ICR);
3782 if (unlikely((!icr)))
3783 return IRQ_NONE; /* Not our interrupt */
3785 /* we might have caused the interrupt, but the above
3786 * read cleared it, and just in case the driver is
3787 * down there is nothing to do so return handled
3789 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3792 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3793 hw->get_link_status = 1;
3794 /* guard against interrupt when we're going down */
3795 if (!test_bit(__E1000_DOWN, &adapter->flags))
3796 schedule_delayed_work(&adapter->watchdog_task, 1);
3799 /* disable interrupts, without the synchronize_irq bit */
3801 E1000_WRITE_FLUSH();
3803 if (likely(napi_schedule_prep(&adapter->napi))) {
3804 adapter->total_tx_bytes = 0;
3805 adapter->total_tx_packets = 0;
3806 adapter->total_rx_bytes = 0;
3807 adapter->total_rx_packets = 0;
3808 __napi_schedule(&adapter->napi);
3810 /* this really should not happen! if it does it is basically a
3811 * bug, but not a hard error, so enable ints and continue
3813 if (!test_bit(__E1000_DOWN, &adapter->flags))
3814 e1000_irq_enable(adapter);
3821 * e1000_clean - NAPI Rx polling callback
3822 * @adapter: board private structure
3824 static int e1000_clean(struct napi_struct *napi, int budget)
3826 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
3828 int tx_clean_complete = 0, work_done = 0;
3830 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3832 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3834 if (!tx_clean_complete)
3837 /* If budget not fully consumed, exit the polling mode */
3838 if (work_done < budget) {
3839 if (likely(adapter->itr_setting & 3))
3840 e1000_set_itr(adapter);
3841 napi_complete_done(napi, work_done);
3842 if (!test_bit(__E1000_DOWN, &adapter->flags))
3843 e1000_irq_enable(adapter);
3850 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3851 * @adapter: board private structure
3853 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3854 struct e1000_tx_ring *tx_ring)
3856 struct e1000_hw *hw = &adapter->hw;
3857 struct net_device *netdev = adapter->netdev;
3858 struct e1000_tx_desc *tx_desc, *eop_desc;
3859 struct e1000_tx_buffer *buffer_info;
3860 unsigned int i, eop;
3861 unsigned int count = 0;
3862 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
3863 unsigned int bytes_compl = 0, pkts_compl = 0;
3865 i = tx_ring->next_to_clean;
3866 eop = tx_ring->buffer_info[i].next_to_watch;
3867 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3869 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3870 (count < tx_ring->count)) {
3871 bool cleaned = false;
3872 dma_rmb(); /* read buffer_info after eop_desc */
3873 for ( ; !cleaned; count++) {
3874 tx_desc = E1000_TX_DESC(*tx_ring, i);
3875 buffer_info = &tx_ring->buffer_info[i];
3876 cleaned = (i == eop);
3879 total_tx_packets += buffer_info->segs;
3880 total_tx_bytes += buffer_info->bytecount;
3881 if (buffer_info->skb) {
3882 bytes_compl += buffer_info->skb->len;
3887 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3888 tx_desc->upper.data = 0;
3890 if (unlikely(++i == tx_ring->count))
3894 eop = tx_ring->buffer_info[i].next_to_watch;
3895 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3898 /* Synchronize with E1000_DESC_UNUSED called from e1000_xmit_frame,
3899 * which will reuse the cleaned buffers.
3901 smp_store_release(&tx_ring->next_to_clean, i);
3903 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
3905 #define TX_WAKE_THRESHOLD 32
3906 if (unlikely(count && netif_carrier_ok(netdev) &&
3907 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3908 /* Make sure that anybody stopping the queue after this
3909 * sees the new next_to_clean.
3913 if (netif_queue_stopped(netdev) &&
3914 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3915 netif_wake_queue(netdev);
3916 ++adapter->restart_queue;
3920 if (adapter->detect_tx_hung) {
3921 /* Detect a transmit hang in hardware, this serializes the
3922 * check with the clearing of time_stamp and movement of i
3924 adapter->detect_tx_hung = false;
3925 if (tx_ring->buffer_info[eop].time_stamp &&
3926 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3927 (adapter->tx_timeout_factor * HZ)) &&
3928 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3930 /* detected Tx unit hang */
3931 e_err(drv, "Detected Tx Unit Hang\n"
3935 " next_to_use <%x>\n"
3936 " next_to_clean <%x>\n"
3937 "buffer_info[next_to_clean]\n"
3938 " time_stamp <%lx>\n"
3939 " next_to_watch <%x>\n"
3941 " next_to_watch.status <%x>\n",
3942 (unsigned long)(tx_ring - adapter->tx_ring),
3943 readl(hw->hw_addr + tx_ring->tdh),
3944 readl(hw->hw_addr + tx_ring->tdt),
3945 tx_ring->next_to_use,
3946 tx_ring->next_to_clean,
3947 tx_ring->buffer_info[eop].time_stamp,
3950 eop_desc->upper.fields.status);
3951 e1000_dump(adapter);
3952 netif_stop_queue(netdev);
3955 adapter->total_tx_bytes += total_tx_bytes;
3956 adapter->total_tx_packets += total_tx_packets;
3957 netdev->stats.tx_bytes += total_tx_bytes;
3958 netdev->stats.tx_packets += total_tx_packets;
3959 return count < tx_ring->count;
3963 * e1000_rx_checksum - Receive Checksum Offload for 82543
3964 * @adapter: board private structure
3965 * @status_err: receive descriptor status and error fields
3966 * @csum: receive descriptor csum field
3967 * @sk_buff: socket buffer with received data
3969 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3970 u32 csum, struct sk_buff *skb)
3972 struct e1000_hw *hw = &adapter->hw;
3973 u16 status = (u16)status_err;
3974 u8 errors = (u8)(status_err >> 24);
3976 skb_checksum_none_assert(skb);
3978 /* 82543 or newer only */
3979 if (unlikely(hw->mac_type < e1000_82543))
3981 /* Ignore Checksum bit is set */
3982 if (unlikely(status & E1000_RXD_STAT_IXSM))
3984 /* TCP/UDP checksum error bit is set */
3985 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3986 /* let the stack verify checksum errors */
3987 adapter->hw_csum_err++;
3990 /* TCP/UDP Checksum has not been calculated */
3991 if (!(status & E1000_RXD_STAT_TCPCS))
3994 /* It must be a TCP or UDP packet with a valid checksum */
3995 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3996 /* TCP checksum is good */
3997 skb->ip_summed = CHECKSUM_UNNECESSARY;
3999 adapter->hw_csum_good++;
4003 * e1000_consume_page - helper function for jumbo Rx path
4005 static void e1000_consume_page(struct e1000_rx_buffer *bi, struct sk_buff *skb,
4008 bi->rxbuf.page = NULL;
4010 skb->data_len += length;
4011 skb->truesize += PAGE_SIZE;
4015 * e1000_receive_skb - helper function to handle rx indications
4016 * @adapter: board private structure
4017 * @status: descriptor status field as written by hardware
4018 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
4019 * @skb: pointer to sk_buff to be indicated to stack
4021 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
4022 __le16 vlan, struct sk_buff *skb)
4024 skb->protocol = eth_type_trans(skb, adapter->netdev);
4026 if (status & E1000_RXD_STAT_VP) {
4027 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4029 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4031 napi_gro_receive(&adapter->napi, skb);
4035 * e1000_tbi_adjust_stats
4036 * @hw: Struct containing variables accessed by shared code
4037 * @frame_len: The length of the frame in question
4038 * @mac_addr: The Ethernet destination address of the frame in question
4040 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
4042 static void e1000_tbi_adjust_stats(struct e1000_hw *hw,
4043 struct e1000_hw_stats *stats,
4044 u32 frame_len, const u8 *mac_addr)
4048 /* First adjust the frame length. */
4050 /* We need to adjust the statistics counters, since the hardware
4051 * counters overcount this packet as a CRC error and undercount
4052 * the packet as a good packet
4054 /* This packet should not be counted as a CRC error. */
4056 /* This packet does count as a Good Packet Received. */
4059 /* Adjust the Good Octets received counters */
4060 carry_bit = 0x80000000 & stats->gorcl;
4061 stats->gorcl += frame_len;
4062 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4063 * Received Count) was one before the addition,
4064 * AND it is zero after, then we lost the carry out,
4065 * need to add one to Gorch (Good Octets Received Count High).
4066 * This could be simplified if all environments supported
4069 if (carry_bit && ((stats->gorcl & 0x80000000) == 0))
4071 /* Is this a broadcast or multicast? Check broadcast first,
4072 * since the test for a multicast frame will test positive on
4073 * a broadcast frame.
4075 if (is_broadcast_ether_addr(mac_addr))
4077 else if (is_multicast_ether_addr(mac_addr))
4080 if (frame_len == hw->max_frame_size) {
4081 /* In this case, the hardware has overcounted the number of
4088 /* Adjust the bin counters when the extra byte put the frame in the
4089 * wrong bin. Remember that the frame_len was adjusted above.
4091 if (frame_len == 64) {
4094 } else if (frame_len == 127) {
4097 } else if (frame_len == 255) {
4100 } else if (frame_len == 511) {
4103 } else if (frame_len == 1023) {
4106 } else if (frame_len == 1522) {
4111 static bool e1000_tbi_should_accept(struct e1000_adapter *adapter,
4112 u8 status, u8 errors,
4113 u32 length, const u8 *data)
4115 struct e1000_hw *hw = &adapter->hw;
4116 u8 last_byte = *(data + length - 1);
4118 if (TBI_ACCEPT(hw, status, errors, length, last_byte)) {
4119 unsigned long irq_flags;
4121 spin_lock_irqsave(&adapter->stats_lock, irq_flags);
4122 e1000_tbi_adjust_stats(hw, &adapter->stats, length, data);
4123 spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
4131 static struct sk_buff *e1000_alloc_rx_skb(struct e1000_adapter *adapter,
4134 struct sk_buff *skb = napi_alloc_skb(&adapter->napi, bufsz);
4137 adapter->alloc_rx_buff_failed++;
4142 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4143 * @adapter: board private structure
4144 * @rx_ring: ring to clean
4145 * @work_done: amount of napi work completed this call
4146 * @work_to_do: max amount of work allowed for this call to do
4148 * the return value indicates whether actual cleaning was done, there
4149 * is no guarantee that everything was cleaned
4151 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
4152 struct e1000_rx_ring *rx_ring,
4153 int *work_done, int work_to_do)
4155 struct net_device *netdev = adapter->netdev;
4156 struct pci_dev *pdev = adapter->pdev;
4157 struct e1000_rx_desc *rx_desc, *next_rxd;
4158 struct e1000_rx_buffer *buffer_info, *next_buffer;
4161 int cleaned_count = 0;
4162 bool cleaned = false;
4163 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4165 i = rx_ring->next_to_clean;
4166 rx_desc = E1000_RX_DESC(*rx_ring, i);
4167 buffer_info = &rx_ring->buffer_info[i];
4169 while (rx_desc->status & E1000_RXD_STAT_DD) {
4170 struct sk_buff *skb;
4173 if (*work_done >= work_to_do)
4176 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4178 status = rx_desc->status;
4180 if (++i == rx_ring->count)
4183 next_rxd = E1000_RX_DESC(*rx_ring, i);
4186 next_buffer = &rx_ring->buffer_info[i];
4190 dma_unmap_page(&pdev->dev, buffer_info->dma,
4191 adapter->rx_buffer_len, DMA_FROM_DEVICE);
4192 buffer_info->dma = 0;
4194 length = le16_to_cpu(rx_desc->length);
4196 /* errors is only valid for DD + EOP descriptors */
4197 if (unlikely((status & E1000_RXD_STAT_EOP) &&
4198 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
4199 u8 *mapped = page_address(buffer_info->rxbuf.page);
4201 if (e1000_tbi_should_accept(adapter, status,
4205 } else if (netdev->features & NETIF_F_RXALL) {
4208 /* an error means any chain goes out the window
4211 if (rx_ring->rx_skb_top)
4212 dev_kfree_skb(rx_ring->rx_skb_top);
4213 rx_ring->rx_skb_top = NULL;
4218 #define rxtop rx_ring->rx_skb_top
4220 if (!(status & E1000_RXD_STAT_EOP)) {
4221 /* this descriptor is only the beginning (or middle) */
4223 /* this is the beginning of a chain */
4224 rxtop = napi_get_frags(&adapter->napi);
4228 skb_fill_page_desc(rxtop, 0,
4229 buffer_info->rxbuf.page,
4232 /* this is the middle of a chain */
4233 skb_fill_page_desc(rxtop,
4234 skb_shinfo(rxtop)->nr_frags,
4235 buffer_info->rxbuf.page, 0, length);
4237 e1000_consume_page(buffer_info, rxtop, length);
4241 /* end of the chain */
4242 skb_fill_page_desc(rxtop,
4243 skb_shinfo(rxtop)->nr_frags,
4244 buffer_info->rxbuf.page, 0, length);
4247 e1000_consume_page(buffer_info, skb, length);
4250 /* no chain, got EOP, this buf is the packet
4251 * copybreak to save the put_page/alloc_page
4253 p = buffer_info->rxbuf.page;
4254 if (length <= copybreak) {
4257 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4259 skb = e1000_alloc_rx_skb(adapter,
4264 vaddr = kmap_atomic(p);
4265 memcpy(skb_tail_pointer(skb), vaddr,
4267 kunmap_atomic(vaddr);
4268 /* re-use the page, so don't erase
4269 * buffer_info->rxbuf.page
4271 skb_put(skb, length);
4272 e1000_rx_checksum(adapter,
4273 status | rx_desc->errors << 24,
4274 le16_to_cpu(rx_desc->csum), skb);
4276 total_rx_bytes += skb->len;
4279 e1000_receive_skb(adapter, status,
4280 rx_desc->special, skb);
4283 skb = napi_get_frags(&adapter->napi);
4285 adapter->alloc_rx_buff_failed++;
4288 skb_fill_page_desc(skb, 0, p, 0,
4290 e1000_consume_page(buffer_info, skb,
4296 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4297 e1000_rx_checksum(adapter,
4299 ((u32)(rx_desc->errors) << 24),
4300 le16_to_cpu(rx_desc->csum), skb);
4302 total_rx_bytes += (skb->len - 4); /* don't count FCS */
4303 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4304 pskb_trim(skb, skb->len - 4);
4307 if (status & E1000_RXD_STAT_VP) {
4308 __le16 vlan = rx_desc->special;
4309 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
4311 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4314 napi_gro_frags(&adapter->napi);
4317 rx_desc->status = 0;
4319 /* return some buffers to hardware, one at a time is too slow */
4320 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4321 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4325 /* use prefetched values */
4327 buffer_info = next_buffer;
4329 rx_ring->next_to_clean = i;
4331 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4333 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4335 adapter->total_rx_packets += total_rx_packets;
4336 adapter->total_rx_bytes += total_rx_bytes;
4337 netdev->stats.rx_bytes += total_rx_bytes;
4338 netdev->stats.rx_packets += total_rx_packets;
4342 /* this should improve performance for small packets with large amounts
4343 * of reassembly being done in the stack
4345 static struct sk_buff *e1000_copybreak(struct e1000_adapter *adapter,
4346 struct e1000_rx_buffer *buffer_info,
4347 u32 length, const void *data)
4349 struct sk_buff *skb;
4351 if (length > copybreak)
4354 skb = e1000_alloc_rx_skb(adapter, length);
4358 dma_sync_single_for_cpu(&adapter->pdev->dev, buffer_info->dma,
4359 length, DMA_FROM_DEVICE);
4361 skb_put_data(skb, data, length);
4367 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4368 * @adapter: board private structure
4369 * @rx_ring: ring to clean
4370 * @work_done: amount of napi work completed this call
4371 * @work_to_do: max amount of work allowed for this call to do
4373 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
4374 struct e1000_rx_ring *rx_ring,
4375 int *work_done, int work_to_do)
4377 struct net_device *netdev = adapter->netdev;
4378 struct pci_dev *pdev = adapter->pdev;
4379 struct e1000_rx_desc *rx_desc, *next_rxd;
4380 struct e1000_rx_buffer *buffer_info, *next_buffer;
4383 int cleaned_count = 0;
4384 bool cleaned = false;
4385 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
4387 i = rx_ring->next_to_clean;
4388 rx_desc = E1000_RX_DESC(*rx_ring, i);
4389 buffer_info = &rx_ring->buffer_info[i];
4391 while (rx_desc->status & E1000_RXD_STAT_DD) {
4392 struct sk_buff *skb;
4396 if (*work_done >= work_to_do)
4399 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
4401 status = rx_desc->status;
4402 length = le16_to_cpu(rx_desc->length);
4404 data = buffer_info->rxbuf.data;
4406 skb = e1000_copybreak(adapter, buffer_info, length, data);
4408 unsigned int frag_len = e1000_frag_len(adapter);
4410 skb = build_skb(data - E1000_HEADROOM, frag_len);
4412 adapter->alloc_rx_buff_failed++;
4416 skb_reserve(skb, E1000_HEADROOM);
4417 dma_unmap_single(&pdev->dev, buffer_info->dma,
4418 adapter->rx_buffer_len,
4420 buffer_info->dma = 0;
4421 buffer_info->rxbuf.data = NULL;
4424 if (++i == rx_ring->count)
4427 next_rxd = E1000_RX_DESC(*rx_ring, i);
4430 next_buffer = &rx_ring->buffer_info[i];
4435 /* !EOP means multiple descriptors were used to store a single
4436 * packet, if thats the case we need to toss it. In fact, we
4437 * to toss every packet with the EOP bit clear and the next
4438 * frame that _does_ have the EOP bit set, as it is by
4439 * definition only a frame fragment
4441 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4442 adapter->discarding = true;
4444 if (adapter->discarding) {
4445 /* All receives must fit into a single buffer */
4446 netdev_dbg(netdev, "Receive packet consumed multiple buffers\n");
4448 if (status & E1000_RXD_STAT_EOP)
4449 adapter->discarding = false;
4453 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4454 if (e1000_tbi_should_accept(adapter, status,
4458 } else if (netdev->features & NETIF_F_RXALL) {
4467 total_rx_bytes += (length - 4); /* don't count FCS */
4470 if (likely(!(netdev->features & NETIF_F_RXFCS)))
4471 /* adjust length to remove Ethernet CRC, this must be
4472 * done after the TBI_ACCEPT workaround above
4476 if (buffer_info->rxbuf.data == NULL)
4477 skb_put(skb, length);
4478 else /* copybreak skb */
4479 skb_trim(skb, length);
4481 /* Receive Checksum Offload */
4482 e1000_rx_checksum(adapter,
4484 ((u32)(rx_desc->errors) << 24),
4485 le16_to_cpu(rx_desc->csum), skb);
4487 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4490 rx_desc->status = 0;
4492 /* return some buffers to hardware, one at a time is too slow */
4493 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4494 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4498 /* use prefetched values */
4500 buffer_info = next_buffer;
4502 rx_ring->next_to_clean = i;
4504 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4506 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4508 adapter->total_rx_packets += total_rx_packets;
4509 adapter->total_rx_bytes += total_rx_bytes;
4510 netdev->stats.rx_bytes += total_rx_bytes;
4511 netdev->stats.rx_packets += total_rx_packets;
4516 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4517 * @adapter: address of board private structure
4518 * @rx_ring: pointer to receive ring structure
4519 * @cleaned_count: number of buffers to allocate this pass
4522 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4523 struct e1000_rx_ring *rx_ring, int cleaned_count)
4525 struct pci_dev *pdev = adapter->pdev;
4526 struct e1000_rx_desc *rx_desc;
4527 struct e1000_rx_buffer *buffer_info;
4530 i = rx_ring->next_to_use;
4531 buffer_info = &rx_ring->buffer_info[i];
4533 while (cleaned_count--) {
4534 /* allocate a new page if necessary */
4535 if (!buffer_info->rxbuf.page) {
4536 buffer_info->rxbuf.page = alloc_page(GFP_ATOMIC);
4537 if (unlikely(!buffer_info->rxbuf.page)) {
4538 adapter->alloc_rx_buff_failed++;
4543 if (!buffer_info->dma) {
4544 buffer_info->dma = dma_map_page(&pdev->dev,
4545 buffer_info->rxbuf.page, 0,
4546 adapter->rx_buffer_len,
4548 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4549 put_page(buffer_info->rxbuf.page);
4550 buffer_info->rxbuf.page = NULL;
4551 buffer_info->dma = 0;
4552 adapter->alloc_rx_buff_failed++;
4557 rx_desc = E1000_RX_DESC(*rx_ring, i);
4558 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4560 if (unlikely(++i == rx_ring->count))
4562 buffer_info = &rx_ring->buffer_info[i];
4565 if (likely(rx_ring->next_to_use != i)) {
4566 rx_ring->next_to_use = i;
4567 if (unlikely(i-- == 0))
4568 i = (rx_ring->count - 1);
4570 /* Force memory writes to complete before letting h/w
4571 * know there are new descriptors to fetch. (Only
4572 * applicable for weak-ordered memory model archs,
4576 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4581 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4582 * @adapter: address of board private structure
4584 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4585 struct e1000_rx_ring *rx_ring,
4588 struct e1000_hw *hw = &adapter->hw;
4589 struct pci_dev *pdev = adapter->pdev;
4590 struct e1000_rx_desc *rx_desc;
4591 struct e1000_rx_buffer *buffer_info;
4593 unsigned int bufsz = adapter->rx_buffer_len;
4595 i = rx_ring->next_to_use;
4596 buffer_info = &rx_ring->buffer_info[i];
4598 while (cleaned_count--) {
4601 if (buffer_info->rxbuf.data)
4604 data = e1000_alloc_frag(adapter);
4606 /* Better luck next round */
4607 adapter->alloc_rx_buff_failed++;
4611 /* Fix for errata 23, can't cross 64kB boundary */
4612 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4613 void *olddata = data;
4614 e_err(rx_err, "skb align check failed: %u bytes at "
4615 "%p\n", bufsz, data);
4616 /* Try again, without freeing the previous */
4617 data = e1000_alloc_frag(adapter);
4618 /* Failed allocation, critical failure */
4620 skb_free_frag(olddata);
4621 adapter->alloc_rx_buff_failed++;
4625 if (!e1000_check_64k_bound(adapter, data, bufsz)) {
4627 skb_free_frag(data);
4628 skb_free_frag(olddata);
4629 adapter->alloc_rx_buff_failed++;
4633 /* Use new allocation */
4634 skb_free_frag(olddata);
4636 buffer_info->dma = dma_map_single(&pdev->dev,
4638 adapter->rx_buffer_len,
4640 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4641 skb_free_frag(data);
4642 buffer_info->dma = 0;
4643 adapter->alloc_rx_buff_failed++;
4647 /* XXX if it was allocated cleanly it will never map to a
4651 /* Fix for errata 23, can't cross 64kB boundary */
4652 if (!e1000_check_64k_bound(adapter,
4653 (void *)(unsigned long)buffer_info->dma,
4654 adapter->rx_buffer_len)) {
4655 e_err(rx_err, "dma align check failed: %u bytes at "
4656 "%p\n", adapter->rx_buffer_len,
4657 (void *)(unsigned long)buffer_info->dma);
4659 dma_unmap_single(&pdev->dev, buffer_info->dma,
4660 adapter->rx_buffer_len,
4663 skb_free_frag(data);
4664 buffer_info->rxbuf.data = NULL;
4665 buffer_info->dma = 0;
4667 adapter->alloc_rx_buff_failed++;
4670 buffer_info->rxbuf.data = data;
4672 rx_desc = E1000_RX_DESC(*rx_ring, i);
4673 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4675 if (unlikely(++i == rx_ring->count))
4677 buffer_info = &rx_ring->buffer_info[i];
4680 if (likely(rx_ring->next_to_use != i)) {
4681 rx_ring->next_to_use = i;
4682 if (unlikely(i-- == 0))
4683 i = (rx_ring->count - 1);
4685 /* Force memory writes to complete before letting h/w
4686 * know there are new descriptors to fetch. (Only
4687 * applicable for weak-ordered memory model archs,
4691 writel(i, hw->hw_addr + rx_ring->rdt);
4696 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4699 static void e1000_smartspeed(struct e1000_adapter *adapter)
4701 struct e1000_hw *hw = &adapter->hw;
4705 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4706 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4709 if (adapter->smartspeed == 0) {
4710 /* If Master/Slave config fault is asserted twice,
4711 * we assume back-to-back
4713 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4714 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4716 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4717 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT))
4719 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4720 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4721 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4722 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4724 adapter->smartspeed++;
4725 if (!e1000_phy_setup_autoneg(hw) &&
4726 !e1000_read_phy_reg(hw, PHY_CTRL,
4728 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4729 MII_CR_RESTART_AUTO_NEG);
4730 e1000_write_phy_reg(hw, PHY_CTRL,
4735 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4736 /* If still no link, perhaps using 2/3 pair cable */
4737 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4738 phy_ctrl |= CR_1000T_MS_ENABLE;
4739 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4740 if (!e1000_phy_setup_autoneg(hw) &&
4741 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4742 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4743 MII_CR_RESTART_AUTO_NEG);
4744 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4747 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4748 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4749 adapter->smartspeed = 0;
4758 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4764 return e1000_mii_ioctl(netdev, ifr, cmd);
4776 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4779 struct e1000_adapter *adapter = netdev_priv(netdev);
4780 struct e1000_hw *hw = &adapter->hw;
4781 struct mii_ioctl_data *data = if_mii(ifr);
4784 unsigned long flags;
4786 if (hw->media_type != e1000_media_type_copper)
4791 data->phy_id = hw->phy_addr;
4794 spin_lock_irqsave(&adapter->stats_lock, flags);
4795 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4797 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4800 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4803 if (data->reg_num & ~(0x1F))
4805 mii_reg = data->val_in;
4806 spin_lock_irqsave(&adapter->stats_lock, flags);
4807 if (e1000_write_phy_reg(hw, data->reg_num,
4809 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4812 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4813 if (hw->media_type == e1000_media_type_copper) {
4814 switch (data->reg_num) {
4816 if (mii_reg & MII_CR_POWER_DOWN)
4818 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4820 hw->autoneg_advertised = 0x2F;
4825 else if (mii_reg & 0x2000)
4829 retval = e1000_set_spd_dplx(
4837 if (netif_running(adapter->netdev))
4838 e1000_reinit_locked(adapter);
4840 e1000_reset(adapter);
4842 case M88E1000_PHY_SPEC_CTRL:
4843 case M88E1000_EXT_PHY_SPEC_CTRL:
4844 if (e1000_phy_reset(hw))
4849 switch (data->reg_num) {
4851 if (mii_reg & MII_CR_POWER_DOWN)
4853 if (netif_running(adapter->netdev))
4854 e1000_reinit_locked(adapter);
4856 e1000_reset(adapter);
4864 return E1000_SUCCESS;
4867 void e1000_pci_set_mwi(struct e1000_hw *hw)
4869 struct e1000_adapter *adapter = hw->back;
4870 int ret_val = pci_set_mwi(adapter->pdev);
4873 e_err(probe, "Error in setting MWI\n");
4876 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4878 struct e1000_adapter *adapter = hw->back;
4880 pci_clear_mwi(adapter->pdev);
4883 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4885 struct e1000_adapter *adapter = hw->back;
4886 return pcix_get_mmrbc(adapter->pdev);
4889 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4891 struct e1000_adapter *adapter = hw->back;
4892 pcix_set_mmrbc(adapter->pdev, mmrbc);
4895 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4900 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4904 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4909 static void __e1000_vlan_mode(struct e1000_adapter *adapter,
4910 netdev_features_t features)
4912 struct e1000_hw *hw = &adapter->hw;
4916 if (features & NETIF_F_HW_VLAN_CTAG_RX) {
4917 /* enable VLAN tag insert/strip */
4918 ctrl |= E1000_CTRL_VME;
4920 /* disable VLAN tag insert/strip */
4921 ctrl &= ~E1000_CTRL_VME;
4925 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4928 struct e1000_hw *hw = &adapter->hw;
4931 if (!test_bit(__E1000_DOWN, &adapter->flags))
4932 e1000_irq_disable(adapter);
4934 __e1000_vlan_mode(adapter, adapter->netdev->features);
4936 /* enable VLAN receive filtering */
4938 rctl &= ~E1000_RCTL_CFIEN;
4939 if (!(adapter->netdev->flags & IFF_PROMISC))
4940 rctl |= E1000_RCTL_VFE;
4942 e1000_update_mng_vlan(adapter);
4944 /* disable VLAN receive filtering */
4946 rctl &= ~E1000_RCTL_VFE;
4950 if (!test_bit(__E1000_DOWN, &adapter->flags))
4951 e1000_irq_enable(adapter);
4954 static void e1000_vlan_mode(struct net_device *netdev,
4955 netdev_features_t features)
4957 struct e1000_adapter *adapter = netdev_priv(netdev);
4959 if (!test_bit(__E1000_DOWN, &adapter->flags))
4960 e1000_irq_disable(adapter);
4962 __e1000_vlan_mode(adapter, features);
4964 if (!test_bit(__E1000_DOWN, &adapter->flags))
4965 e1000_irq_enable(adapter);
4968 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
4969 __be16 proto, u16 vid)
4971 struct e1000_adapter *adapter = netdev_priv(netdev);
4972 struct e1000_hw *hw = &adapter->hw;
4975 if ((hw->mng_cookie.status &
4976 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4977 (vid == adapter->mng_vlan_id))
4980 if (!e1000_vlan_used(adapter))
4981 e1000_vlan_filter_on_off(adapter, true);
4983 /* add VID to filter table */
4984 index = (vid >> 5) & 0x7F;
4985 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4986 vfta |= (1 << (vid & 0x1F));
4987 e1000_write_vfta(hw, index, vfta);
4989 set_bit(vid, adapter->active_vlans);
4994 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
4995 __be16 proto, u16 vid)
4997 struct e1000_adapter *adapter = netdev_priv(netdev);
4998 struct e1000_hw *hw = &adapter->hw;
5001 if (!test_bit(__E1000_DOWN, &adapter->flags))
5002 e1000_irq_disable(adapter);
5003 if (!test_bit(__E1000_DOWN, &adapter->flags))
5004 e1000_irq_enable(adapter);
5006 /* remove VID from filter table */
5007 index = (vid >> 5) & 0x7F;
5008 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
5009 vfta &= ~(1 << (vid & 0x1F));
5010 e1000_write_vfta(hw, index, vfta);
5012 clear_bit(vid, adapter->active_vlans);
5014 if (!e1000_vlan_used(adapter))
5015 e1000_vlan_filter_on_off(adapter, false);
5020 static void e1000_restore_vlan(struct e1000_adapter *adapter)
5024 if (!e1000_vlan_used(adapter))
5027 e1000_vlan_filter_on_off(adapter, true);
5028 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
5029 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
5032 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
5034 struct e1000_hw *hw = &adapter->hw;
5038 /* Make sure dplx is at most 1 bit and lsb of speed is not set
5039 * for the switch() below to work
5041 if ((spd & 1) || (dplx & ~1))
5044 /* Fiber NICs only allow 1000 gbps Full duplex */
5045 if ((hw->media_type == e1000_media_type_fiber) &&
5046 spd != SPEED_1000 &&
5047 dplx != DUPLEX_FULL)
5050 switch (spd + dplx) {
5051 case SPEED_10 + DUPLEX_HALF:
5052 hw->forced_speed_duplex = e1000_10_half;
5054 case SPEED_10 + DUPLEX_FULL:
5055 hw->forced_speed_duplex = e1000_10_full;
5057 case SPEED_100 + DUPLEX_HALF:
5058 hw->forced_speed_duplex = e1000_100_half;
5060 case SPEED_100 + DUPLEX_FULL:
5061 hw->forced_speed_duplex = e1000_100_full;
5063 case SPEED_1000 + DUPLEX_FULL:
5065 hw->autoneg_advertised = ADVERTISE_1000_FULL;
5067 case SPEED_1000 + DUPLEX_HALF: /* not supported */
5072 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
5073 hw->mdix = AUTO_ALL_MODES;
5078 e_err(probe, "Unsupported Speed/Duplex configuration\n");
5082 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
5084 struct net_device *netdev = pci_get_drvdata(pdev);
5085 struct e1000_adapter *adapter = netdev_priv(netdev);
5086 struct e1000_hw *hw = &adapter->hw;
5087 u32 ctrl, ctrl_ext, rctl, status;
5088 u32 wufc = adapter->wol;
5093 netif_device_detach(netdev);
5095 if (netif_running(netdev)) {
5096 int count = E1000_CHECK_RESET_COUNT;
5098 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--)
5099 usleep_range(10000, 20000);
5101 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
5102 e1000_down(adapter);
5106 retval = pci_save_state(pdev);
5111 status = er32(STATUS);
5112 if (status & E1000_STATUS_LU)
5113 wufc &= ~E1000_WUFC_LNKC;
5116 e1000_setup_rctl(adapter);
5117 e1000_set_rx_mode(netdev);
5121 /* turn on all-multi mode if wake on multicast is enabled */
5122 if (wufc & E1000_WUFC_MC)
5123 rctl |= E1000_RCTL_MPE;
5125 /* enable receives in the hardware */
5126 ew32(RCTL, rctl | E1000_RCTL_EN);
5128 if (hw->mac_type >= e1000_82540) {
5130 /* advertise wake from D3Cold */
5131 #define E1000_CTRL_ADVD3WUC 0x00100000
5132 /* phy power management enable */
5133 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5134 ctrl |= E1000_CTRL_ADVD3WUC |
5135 E1000_CTRL_EN_PHY_PWR_MGMT;
5139 if (hw->media_type == e1000_media_type_fiber ||
5140 hw->media_type == e1000_media_type_internal_serdes) {
5141 /* keep the laser running in D3 */
5142 ctrl_ext = er32(CTRL_EXT);
5143 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
5144 ew32(CTRL_EXT, ctrl_ext);
5147 ew32(WUC, E1000_WUC_PME_EN);
5154 e1000_release_manageability(adapter);
5156 *enable_wake = !!wufc;
5158 /* make sure adapter isn't asleep if manageability is enabled */
5159 if (adapter->en_mng_pt)
5160 *enable_wake = true;
5162 if (netif_running(netdev))
5163 e1000_free_irq(adapter);
5165 if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags))
5166 pci_disable_device(pdev);
5172 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
5177 retval = __e1000_shutdown(pdev, &wake);
5182 pci_prepare_to_sleep(pdev);
5184 pci_wake_from_d3(pdev, false);
5185 pci_set_power_state(pdev, PCI_D3hot);
5191 static int e1000_resume(struct pci_dev *pdev)
5193 struct net_device *netdev = pci_get_drvdata(pdev);
5194 struct e1000_adapter *adapter = netdev_priv(netdev);
5195 struct e1000_hw *hw = &adapter->hw;
5198 pci_set_power_state(pdev, PCI_D0);
5199 pci_restore_state(pdev);
5200 pci_save_state(pdev);
5202 if (adapter->need_ioport)
5203 err = pci_enable_device(pdev);
5205 err = pci_enable_device_mem(pdev);
5207 pr_err("Cannot enable PCI device from suspend\n");
5211 /* flush memory to make sure state is correct */
5212 smp_mb__before_atomic();
5213 clear_bit(__E1000_DISABLED, &adapter->flags);
5214 pci_set_master(pdev);
5216 pci_enable_wake(pdev, PCI_D3hot, 0);
5217 pci_enable_wake(pdev, PCI_D3cold, 0);
5219 if (netif_running(netdev)) {
5220 err = e1000_request_irq(adapter);
5225 e1000_power_up_phy(adapter);
5226 e1000_reset(adapter);
5229 e1000_init_manageability(adapter);
5231 if (netif_running(netdev))
5234 netif_device_attach(netdev);
5240 static void e1000_shutdown(struct pci_dev *pdev)
5244 __e1000_shutdown(pdev, &wake);
5246 if (system_state == SYSTEM_POWER_OFF) {
5247 pci_wake_from_d3(pdev, wake);
5248 pci_set_power_state(pdev, PCI_D3hot);
5252 #ifdef CONFIG_NET_POLL_CONTROLLER
5253 /* Polling 'interrupt' - used by things like netconsole to send skbs
5254 * without having to re-enable interrupts. It's not called while
5255 * the interrupt routine is executing.
5257 static void e1000_netpoll(struct net_device *netdev)
5259 struct e1000_adapter *adapter = netdev_priv(netdev);
5261 if (disable_hardirq(adapter->pdev->irq))
5262 e1000_intr(adapter->pdev->irq, netdev);
5263 enable_irq(adapter->pdev->irq);
5268 * e1000_io_error_detected - called when PCI error is detected
5269 * @pdev: Pointer to PCI device
5270 * @state: The current pci connection state
5272 * This function is called after a PCI bus error affecting
5273 * this device has been detected.
5275 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5276 pci_channel_state_t state)
5278 struct net_device *netdev = pci_get_drvdata(pdev);
5279 struct e1000_adapter *adapter = netdev_priv(netdev);
5281 netif_device_detach(netdev);
5283 if (state == pci_channel_io_perm_failure)
5284 return PCI_ERS_RESULT_DISCONNECT;
5286 if (netif_running(netdev))
5287 e1000_down(adapter);
5289 if (!test_and_set_bit(__E1000_DISABLED, &adapter->flags))
5290 pci_disable_device(pdev);
5292 /* Request a slot slot reset. */
5293 return PCI_ERS_RESULT_NEED_RESET;
5297 * e1000_io_slot_reset - called after the pci bus has been reset.
5298 * @pdev: Pointer to PCI device
5300 * Restart the card from scratch, as if from a cold-boot. Implementation
5301 * resembles the first-half of the e1000_resume routine.
5303 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5305 struct net_device *netdev = pci_get_drvdata(pdev);
5306 struct e1000_adapter *adapter = netdev_priv(netdev);
5307 struct e1000_hw *hw = &adapter->hw;
5310 if (adapter->need_ioport)
5311 err = pci_enable_device(pdev);
5313 err = pci_enable_device_mem(pdev);
5315 pr_err("Cannot re-enable PCI device after reset.\n");
5316 return PCI_ERS_RESULT_DISCONNECT;
5319 /* flush memory to make sure state is correct */
5320 smp_mb__before_atomic();
5321 clear_bit(__E1000_DISABLED, &adapter->flags);
5322 pci_set_master(pdev);
5324 pci_enable_wake(pdev, PCI_D3hot, 0);
5325 pci_enable_wake(pdev, PCI_D3cold, 0);
5327 e1000_reset(adapter);
5330 return PCI_ERS_RESULT_RECOVERED;
5334 * e1000_io_resume - called when traffic can start flowing again.
5335 * @pdev: Pointer to PCI device
5337 * This callback is called when the error recovery driver tells us that
5338 * its OK to resume normal operation. Implementation resembles the
5339 * second-half of the e1000_resume routine.
5341 static void e1000_io_resume(struct pci_dev *pdev)
5343 struct net_device *netdev = pci_get_drvdata(pdev);
5344 struct e1000_adapter *adapter = netdev_priv(netdev);
5346 e1000_init_manageability(adapter);
5348 if (netif_running(netdev)) {
5349 if (e1000_up(adapter)) {
5350 pr_info("can't bring device back up after reset\n");
5355 netif_device_attach(netdev);