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 char e1000_driver_name[] = "e1000";
33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
34 #define DRV_VERSION "7.3.21-k6-NAPI"
35 const char e1000_driver_version[] = DRV_VERSION;
36 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
38 /* e1000_pci_tbl - PCI Device ID Table
40 * Last entry must be all 0s
43 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
45 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
46 INTEL_E1000_ETHERNET_DEVICE(0x1000),
47 INTEL_E1000_ETHERNET_DEVICE(0x1001),
48 INTEL_E1000_ETHERNET_DEVICE(0x1004),
49 INTEL_E1000_ETHERNET_DEVICE(0x1008),
50 INTEL_E1000_ETHERNET_DEVICE(0x1009),
51 INTEL_E1000_ETHERNET_DEVICE(0x100C),
52 INTEL_E1000_ETHERNET_DEVICE(0x100D),
53 INTEL_E1000_ETHERNET_DEVICE(0x100E),
54 INTEL_E1000_ETHERNET_DEVICE(0x100F),
55 INTEL_E1000_ETHERNET_DEVICE(0x1010),
56 INTEL_E1000_ETHERNET_DEVICE(0x1011),
57 INTEL_E1000_ETHERNET_DEVICE(0x1012),
58 INTEL_E1000_ETHERNET_DEVICE(0x1013),
59 INTEL_E1000_ETHERNET_DEVICE(0x1014),
60 INTEL_E1000_ETHERNET_DEVICE(0x1015),
61 INTEL_E1000_ETHERNET_DEVICE(0x1016),
62 INTEL_E1000_ETHERNET_DEVICE(0x1017),
63 INTEL_E1000_ETHERNET_DEVICE(0x1018),
64 INTEL_E1000_ETHERNET_DEVICE(0x1019),
65 INTEL_E1000_ETHERNET_DEVICE(0x101A),
66 INTEL_E1000_ETHERNET_DEVICE(0x101D),
67 INTEL_E1000_ETHERNET_DEVICE(0x101E),
68 INTEL_E1000_ETHERNET_DEVICE(0x1026),
69 INTEL_E1000_ETHERNET_DEVICE(0x1027),
70 INTEL_E1000_ETHERNET_DEVICE(0x1028),
71 INTEL_E1000_ETHERNET_DEVICE(0x1075),
72 INTEL_E1000_ETHERNET_DEVICE(0x1076),
73 INTEL_E1000_ETHERNET_DEVICE(0x1077),
74 INTEL_E1000_ETHERNET_DEVICE(0x1078),
75 INTEL_E1000_ETHERNET_DEVICE(0x1079),
76 INTEL_E1000_ETHERNET_DEVICE(0x107A),
77 INTEL_E1000_ETHERNET_DEVICE(0x107B),
78 INTEL_E1000_ETHERNET_DEVICE(0x107C),
79 INTEL_E1000_ETHERNET_DEVICE(0x108A),
80 INTEL_E1000_ETHERNET_DEVICE(0x1099),
81 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
82 /* required last entry */
86 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
88 int e1000_up(struct e1000_adapter *adapter);
89 void e1000_down(struct e1000_adapter *adapter);
90 void e1000_reinit_locked(struct e1000_adapter *adapter);
91 void e1000_reset(struct e1000_adapter *adapter);
92 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx);
93 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
94 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
95 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
96 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
97 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
98 struct e1000_tx_ring *txdr);
99 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
100 struct e1000_rx_ring *rxdr);
101 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *tx_ring);
103 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rx_ring);
105 void e1000_update_stats(struct e1000_adapter *adapter);
107 static int e1000_init_module(void);
108 static void e1000_exit_module(void);
109 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
110 static void __devexit e1000_remove(struct pci_dev *pdev);
111 static int e1000_alloc_queues(struct e1000_adapter *adapter);
112 static int e1000_sw_init(struct e1000_adapter *adapter);
113 static int e1000_open(struct net_device *netdev);
114 static int e1000_close(struct net_device *netdev);
115 static void e1000_configure_tx(struct e1000_adapter *adapter);
116 static void e1000_configure_rx(struct e1000_adapter *adapter);
117 static void e1000_setup_rctl(struct e1000_adapter *adapter);
118 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
119 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
120 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
121 struct e1000_tx_ring *tx_ring);
122 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
123 struct e1000_rx_ring *rx_ring);
124 static void e1000_set_rx_mode(struct net_device *netdev);
125 static void e1000_update_phy_info(unsigned long data);
126 static void e1000_watchdog(unsigned long data);
127 static void e1000_82547_tx_fifo_stall(unsigned long data);
128 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
129 struct net_device *netdev);
130 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
131 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
132 static int e1000_set_mac(struct net_device *netdev, void *p);
133 static irqreturn_t e1000_intr(int irq, void *data);
134 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
135 struct e1000_tx_ring *tx_ring);
136 static int e1000_clean(struct napi_struct *napi, int budget);
137 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
138 struct e1000_rx_ring *rx_ring,
139 int *work_done, int work_to_do);
140 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
141 struct e1000_rx_ring *rx_ring,
142 int *work_done, int work_to_do);
143 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
144 struct e1000_rx_ring *rx_ring,
146 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
149 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
150 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
152 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
153 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
154 static void e1000_tx_timeout(struct net_device *dev);
155 static void e1000_reset_task(struct work_struct *work);
156 static void e1000_smartspeed(struct e1000_adapter *adapter);
157 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
158 struct sk_buff *skb);
160 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
161 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
162 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
163 static void e1000_restore_vlan(struct e1000_adapter *adapter);
166 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
167 static int e1000_resume(struct pci_dev *pdev);
169 static void e1000_shutdown(struct pci_dev *pdev);
171 #ifdef CONFIG_NET_POLL_CONTROLLER
172 /* for netdump / net console */
173 static void e1000_netpoll (struct net_device *netdev);
176 #define COPYBREAK_DEFAULT 256
177 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
178 module_param(copybreak, uint, 0644);
179 MODULE_PARM_DESC(copybreak,
180 "Maximum size of packet that is copied to a new buffer on receive");
182 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
183 pci_channel_state_t state);
184 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
185 static void e1000_io_resume(struct pci_dev *pdev);
187 static struct pci_error_handlers e1000_err_handler = {
188 .error_detected = e1000_io_error_detected,
189 .slot_reset = e1000_io_slot_reset,
190 .resume = e1000_io_resume,
193 static struct pci_driver e1000_driver = {
194 .name = e1000_driver_name,
195 .id_table = e1000_pci_tbl,
196 .probe = e1000_probe,
197 .remove = __devexit_p(e1000_remove),
199 /* Power Managment Hooks */
200 .suspend = e1000_suspend,
201 .resume = e1000_resume,
203 .shutdown = e1000_shutdown,
204 .err_handler = &e1000_err_handler
207 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
208 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
209 MODULE_LICENSE("GPL");
210 MODULE_VERSION(DRV_VERSION);
212 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
213 module_param(debug, int, 0);
214 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
217 * e1000_get_hw_dev - return device
218 * used by hardware layer to print debugging information
221 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
223 struct e1000_adapter *adapter = hw->back;
224 return adapter->netdev;
228 * e1000_init_module - Driver Registration Routine
230 * e1000_init_module is the first routine called when the driver is
231 * loaded. All it does is register with the PCI subsystem.
234 static int __init e1000_init_module(void)
237 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
239 pr_info("%s\n", e1000_copyright);
241 ret = pci_register_driver(&e1000_driver);
242 if (copybreak != COPYBREAK_DEFAULT) {
244 pr_info("copybreak disabled\n");
246 pr_info("copybreak enabled for "
247 "packets <= %u bytes\n", copybreak);
252 module_init(e1000_init_module);
255 * e1000_exit_module - Driver Exit Cleanup Routine
257 * e1000_exit_module is called just before the driver is removed
261 static void __exit e1000_exit_module(void)
263 pci_unregister_driver(&e1000_driver);
266 module_exit(e1000_exit_module);
268 static int e1000_request_irq(struct e1000_adapter *adapter)
270 struct net_device *netdev = adapter->netdev;
271 irq_handler_t handler = e1000_intr;
272 int irq_flags = IRQF_SHARED;
275 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
278 e_err("Unable to allocate interrupt Error: %d\n", err);
284 static void e1000_free_irq(struct e1000_adapter *adapter)
286 struct net_device *netdev = adapter->netdev;
288 free_irq(adapter->pdev->irq, netdev);
292 * e1000_irq_disable - Mask off interrupt generation on the NIC
293 * @adapter: board private structure
296 static void e1000_irq_disable(struct e1000_adapter *adapter)
298 struct e1000_hw *hw = &adapter->hw;
302 synchronize_irq(adapter->pdev->irq);
306 * e1000_irq_enable - Enable default interrupt generation settings
307 * @adapter: board private structure
310 static void e1000_irq_enable(struct e1000_adapter *adapter)
312 struct e1000_hw *hw = &adapter->hw;
314 ew32(IMS, IMS_ENABLE_MASK);
318 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
320 struct e1000_hw *hw = &adapter->hw;
321 struct net_device *netdev = adapter->netdev;
322 u16 vid = hw->mng_cookie.vlan_id;
323 u16 old_vid = adapter->mng_vlan_id;
324 if (adapter->vlgrp) {
325 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
326 if (hw->mng_cookie.status &
327 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
328 e1000_vlan_rx_add_vid(netdev, vid);
329 adapter->mng_vlan_id = vid;
331 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
333 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
335 !vlan_group_get_device(adapter->vlgrp, old_vid))
336 e1000_vlan_rx_kill_vid(netdev, old_vid);
338 adapter->mng_vlan_id = vid;
342 static void e1000_init_manageability(struct e1000_adapter *adapter)
344 struct e1000_hw *hw = &adapter->hw;
346 if (adapter->en_mng_pt) {
347 u32 manc = er32(MANC);
349 /* disable hardware interception of ARP */
350 manc &= ~(E1000_MANC_ARP_EN);
356 static void e1000_release_manageability(struct e1000_adapter *adapter)
358 struct e1000_hw *hw = &adapter->hw;
360 if (adapter->en_mng_pt) {
361 u32 manc = er32(MANC);
363 /* re-enable hardware interception of ARP */
364 manc |= E1000_MANC_ARP_EN;
371 * e1000_configure - configure the hardware for RX and TX
372 * @adapter = private board structure
374 static void e1000_configure(struct e1000_adapter *adapter)
376 struct net_device *netdev = adapter->netdev;
379 e1000_set_rx_mode(netdev);
381 e1000_restore_vlan(adapter);
382 e1000_init_manageability(adapter);
384 e1000_configure_tx(adapter);
385 e1000_setup_rctl(adapter);
386 e1000_configure_rx(adapter);
387 /* call E1000_DESC_UNUSED which always leaves
388 * at least 1 descriptor unused to make sure
389 * next_to_use != next_to_clean */
390 for (i = 0; i < adapter->num_rx_queues; i++) {
391 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
392 adapter->alloc_rx_buf(adapter, ring,
393 E1000_DESC_UNUSED(ring));
397 int e1000_up(struct e1000_adapter *adapter)
399 struct e1000_hw *hw = &adapter->hw;
401 /* hardware has been reset, we need to reload some things */
402 e1000_configure(adapter);
404 clear_bit(__E1000_DOWN, &adapter->flags);
406 napi_enable(&adapter->napi);
408 e1000_irq_enable(adapter);
410 netif_wake_queue(adapter->netdev);
412 /* fire a link change interrupt to start the watchdog */
413 ew32(ICS, E1000_ICS_LSC);
418 * e1000_power_up_phy - restore link in case the phy was powered down
419 * @adapter: address of board private structure
421 * The phy may be powered down to save power and turn off link when the
422 * driver is unloaded and wake on lan is not enabled (among others)
423 * *** this routine MUST be followed by a call to e1000_reset ***
427 void e1000_power_up_phy(struct e1000_adapter *adapter)
429 struct e1000_hw *hw = &adapter->hw;
432 /* Just clear the power down bit to wake the phy back up */
433 if (hw->media_type == e1000_media_type_copper) {
434 /* according to the manual, the phy will retain its
435 * settings across a power-down/up cycle */
436 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
437 mii_reg &= ~MII_CR_POWER_DOWN;
438 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
442 static void e1000_power_down_phy(struct e1000_adapter *adapter)
444 struct e1000_hw *hw = &adapter->hw;
446 /* Power down the PHY so no link is implied when interface is down *
447 * The PHY cannot be powered down if any of the following is true *
450 * (c) SoL/IDER session is active */
451 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
452 hw->media_type == e1000_media_type_copper) {
455 switch (hw->mac_type) {
458 case e1000_82545_rev_3:
460 case e1000_82546_rev_3:
462 case e1000_82541_rev_2:
464 case e1000_82547_rev_2:
465 if (er32(MANC) & E1000_MANC_SMBUS_EN)
471 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
472 mii_reg |= MII_CR_POWER_DOWN;
473 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
480 void e1000_down(struct e1000_adapter *adapter)
482 struct e1000_hw *hw = &adapter->hw;
483 struct net_device *netdev = adapter->netdev;
486 /* signal that we're down so the interrupt handler does not
487 * reschedule our watchdog timer */
488 set_bit(__E1000_DOWN, &adapter->flags);
490 /* disable receives in the hardware */
492 ew32(RCTL, rctl & ~E1000_RCTL_EN);
493 /* flush and sleep below */
495 netif_tx_disable(netdev);
497 /* disable transmits in the hardware */
499 tctl &= ~E1000_TCTL_EN;
501 /* flush both disables and wait for them to finish */
505 napi_disable(&adapter->napi);
507 e1000_irq_disable(adapter);
509 del_timer_sync(&adapter->tx_fifo_stall_timer);
510 del_timer_sync(&adapter->watchdog_timer);
511 del_timer_sync(&adapter->phy_info_timer);
513 adapter->link_speed = 0;
514 adapter->link_duplex = 0;
515 netif_carrier_off(netdev);
517 e1000_reset(adapter);
518 e1000_clean_all_tx_rings(adapter);
519 e1000_clean_all_rx_rings(adapter);
522 void e1000_reinit_locked(struct e1000_adapter *adapter)
524 WARN_ON(in_interrupt());
525 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
529 clear_bit(__E1000_RESETTING, &adapter->flags);
532 void e1000_reset(struct e1000_adapter *adapter)
534 struct e1000_hw *hw = &adapter->hw;
535 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
536 bool legacy_pba_adjust = false;
539 /* Repartition Pba for greater than 9k mtu
540 * To take effect CTRL.RST is required.
543 switch (hw->mac_type) {
544 case e1000_82542_rev2_0:
545 case e1000_82542_rev2_1:
550 case e1000_82541_rev_2:
551 legacy_pba_adjust = true;
555 case e1000_82545_rev_3:
557 case e1000_82546_rev_3:
561 case e1000_82547_rev_2:
562 legacy_pba_adjust = true;
565 case e1000_undefined:
570 if (legacy_pba_adjust) {
571 if (hw->max_frame_size > E1000_RXBUFFER_8192)
572 pba -= 8; /* allocate more FIFO for Tx */
574 if (hw->mac_type == e1000_82547) {
575 adapter->tx_fifo_head = 0;
576 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
577 adapter->tx_fifo_size =
578 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
579 atomic_set(&adapter->tx_fifo_stall, 0);
581 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
582 /* adjust PBA for jumbo frames */
585 /* To maintain wire speed transmits, the Tx FIFO should be
586 * large enough to accommodate two full transmit packets,
587 * rounded up to the next 1KB and expressed in KB. Likewise,
588 * the Rx FIFO should be large enough to accommodate at least
589 * one full receive packet and is similarly rounded up and
590 * expressed in KB. */
592 /* upper 16 bits has Tx packet buffer allocation size in KB */
593 tx_space = pba >> 16;
594 /* lower 16 bits has Rx packet buffer allocation size in KB */
597 * the tx fifo also stores 16 bytes of information about the tx
598 * but don't include ethernet FCS because hardware appends it
600 min_tx_space = (hw->max_frame_size +
601 sizeof(struct e1000_tx_desc) -
603 min_tx_space = ALIGN(min_tx_space, 1024);
605 /* software strips receive CRC, so leave room for it */
606 min_rx_space = hw->max_frame_size;
607 min_rx_space = ALIGN(min_rx_space, 1024);
610 /* If current Tx allocation is less than the min Tx FIFO size,
611 * and the min Tx FIFO size is less than the current Rx FIFO
612 * allocation, take space away from current Rx allocation */
613 if (tx_space < min_tx_space &&
614 ((min_tx_space - tx_space) < pba)) {
615 pba = pba - (min_tx_space - tx_space);
617 /* PCI/PCIx hardware has PBA alignment constraints */
618 switch (hw->mac_type) {
619 case e1000_82545 ... e1000_82546_rev_3:
620 pba &= ~(E1000_PBA_8K - 1);
626 /* if short on rx space, rx wins and must trump tx
627 * adjustment or use Early Receive if available */
628 if (pba < min_rx_space)
636 * flow control settings:
637 * The high water mark must be low enough to fit one full frame
638 * (or the size used for early receive) above it in the Rx FIFO.
639 * Set it to the lower of:
640 * - 90% of the Rx FIFO size, and
641 * - the full Rx FIFO size minus the early receive size (for parts
642 * with ERT support assuming ERT set to E1000_ERT_2048), or
643 * - the full Rx FIFO size minus one full frame
645 hwm = min(((pba << 10) * 9 / 10),
646 ((pba << 10) - hw->max_frame_size));
648 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
649 hw->fc_low_water = hw->fc_high_water - 8;
650 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
652 hw->fc = hw->original_fc;
654 /* Allow time for pending master requests to run */
656 if (hw->mac_type >= e1000_82544)
659 if (e1000_init_hw(hw))
660 e_err("Hardware Error\n");
661 e1000_update_mng_vlan(adapter);
663 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
664 if (hw->mac_type >= e1000_82544 &&
666 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
667 u32 ctrl = er32(CTRL);
668 /* clear phy power management bit if we are in gig only mode,
669 * which if enabled will attempt negotiation to 100Mb, which
670 * can cause a loss of link at power off or driver unload */
671 ctrl &= ~E1000_CTRL_SWDPIN3;
675 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
676 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
678 e1000_reset_adaptive(hw);
679 e1000_phy_get_info(hw, &adapter->phy_info);
681 e1000_release_manageability(adapter);
685 * Dump the eeprom for users having checksum issues
687 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
689 struct net_device *netdev = adapter->netdev;
690 struct ethtool_eeprom eeprom;
691 const struct ethtool_ops *ops = netdev->ethtool_ops;
694 u16 csum_old, csum_new = 0;
696 eeprom.len = ops->get_eeprom_len(netdev);
699 data = kmalloc(eeprom.len, GFP_KERNEL);
701 pr_err("Unable to allocate memory to dump EEPROM data\n");
705 ops->get_eeprom(netdev, &eeprom, data);
707 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
708 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
709 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
710 csum_new += data[i] + (data[i + 1] << 8);
711 csum_new = EEPROM_SUM - csum_new;
713 pr_err("/*********************/\n");
714 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
715 pr_err("Calculated : 0x%04x\n", csum_new);
717 pr_err("Offset Values\n");
718 pr_err("======== ======\n");
719 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
721 pr_err("Include this output when contacting your support provider.\n");
722 pr_err("This is not a software error! Something bad happened to\n");
723 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
724 pr_err("result in further problems, possibly loss of data,\n");
725 pr_err("corruption or system hangs!\n");
726 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
727 pr_err("which is invalid and requires you to set the proper MAC\n");
728 pr_err("address manually before continuing to enable this network\n");
729 pr_err("device. Please inspect the EEPROM dump and report the\n");
730 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
731 pr_err("/*********************/\n");
737 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
738 * @pdev: PCI device information struct
740 * Return true if an adapter needs ioport resources
742 static int e1000_is_need_ioport(struct pci_dev *pdev)
744 switch (pdev->device) {
745 case E1000_DEV_ID_82540EM:
746 case E1000_DEV_ID_82540EM_LOM:
747 case E1000_DEV_ID_82540EP:
748 case E1000_DEV_ID_82540EP_LOM:
749 case E1000_DEV_ID_82540EP_LP:
750 case E1000_DEV_ID_82541EI:
751 case E1000_DEV_ID_82541EI_MOBILE:
752 case E1000_DEV_ID_82541ER:
753 case E1000_DEV_ID_82541ER_LOM:
754 case E1000_DEV_ID_82541GI:
755 case E1000_DEV_ID_82541GI_LF:
756 case E1000_DEV_ID_82541GI_MOBILE:
757 case E1000_DEV_ID_82544EI_COPPER:
758 case E1000_DEV_ID_82544EI_FIBER:
759 case E1000_DEV_ID_82544GC_COPPER:
760 case E1000_DEV_ID_82544GC_LOM:
761 case E1000_DEV_ID_82545EM_COPPER:
762 case E1000_DEV_ID_82545EM_FIBER:
763 case E1000_DEV_ID_82546EB_COPPER:
764 case E1000_DEV_ID_82546EB_FIBER:
765 case E1000_DEV_ID_82546EB_QUAD_COPPER:
772 static const struct net_device_ops e1000_netdev_ops = {
773 .ndo_open = e1000_open,
774 .ndo_stop = e1000_close,
775 .ndo_start_xmit = e1000_xmit_frame,
776 .ndo_get_stats = e1000_get_stats,
777 .ndo_set_rx_mode = e1000_set_rx_mode,
778 .ndo_set_mac_address = e1000_set_mac,
779 .ndo_tx_timeout = e1000_tx_timeout,
780 .ndo_change_mtu = e1000_change_mtu,
781 .ndo_do_ioctl = e1000_ioctl,
782 .ndo_validate_addr = eth_validate_addr,
784 .ndo_vlan_rx_register = e1000_vlan_rx_register,
785 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
786 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
787 #ifdef CONFIG_NET_POLL_CONTROLLER
788 .ndo_poll_controller = e1000_netpoll,
793 * e1000_probe - Device Initialization Routine
794 * @pdev: PCI device information struct
795 * @ent: entry in e1000_pci_tbl
797 * Returns 0 on success, negative on failure
799 * e1000_probe initializes an adapter identified by a pci_dev structure.
800 * The OS initialization, configuring of the adapter private structure,
801 * and a hardware reset occur.
803 static int __devinit e1000_probe(struct pci_dev *pdev,
804 const struct pci_device_id *ent)
806 struct net_device *netdev;
807 struct e1000_adapter *adapter;
810 static int cards_found = 0;
811 static int global_quad_port_a = 0; /* global ksp3 port a indication */
812 int i, err, pci_using_dac;
814 u16 eeprom_apme_mask = E1000_EEPROM_APME;
815 int bars, need_ioport;
817 /* do not allocate ioport bars when not needed */
818 need_ioport = e1000_is_need_ioport(pdev);
820 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
821 err = pci_enable_device(pdev);
823 bars = pci_select_bars(pdev, IORESOURCE_MEM);
824 err = pci_enable_device_mem(pdev);
829 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
830 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
833 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
835 err = dma_set_coherent_mask(&pdev->dev,
838 pr_err("No usable DMA config, aborting\n");
845 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
849 pci_set_master(pdev);
850 err = pci_save_state(pdev);
852 goto err_alloc_etherdev;
855 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
857 goto err_alloc_etherdev;
859 SET_NETDEV_DEV(netdev, &pdev->dev);
861 pci_set_drvdata(pdev, netdev);
862 adapter = netdev_priv(netdev);
863 adapter->netdev = netdev;
864 adapter->pdev = pdev;
865 adapter->msg_enable = (1 << debug) - 1;
866 adapter->bars = bars;
867 adapter->need_ioport = need_ioport;
873 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
877 if (adapter->need_ioport) {
878 for (i = BAR_1; i <= BAR_5; i++) {
879 if (pci_resource_len(pdev, i) == 0)
881 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
882 hw->io_base = pci_resource_start(pdev, i);
888 netdev->netdev_ops = &e1000_netdev_ops;
889 e1000_set_ethtool_ops(netdev);
890 netdev->watchdog_timeo = 5 * HZ;
891 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
893 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
895 adapter->bd_number = cards_found;
897 /* setup the private structure */
899 err = e1000_sw_init(adapter);
905 if (hw->mac_type >= e1000_82543) {
906 netdev->features = NETIF_F_SG |
910 NETIF_F_HW_VLAN_FILTER;
913 if ((hw->mac_type >= e1000_82544) &&
914 (hw->mac_type != e1000_82547))
915 netdev->features |= NETIF_F_TSO;
918 netdev->features |= NETIF_F_HIGHDMA;
920 netdev->vlan_features |= NETIF_F_TSO;
921 netdev->vlan_features |= NETIF_F_HW_CSUM;
922 netdev->vlan_features |= NETIF_F_SG;
924 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
926 /* initialize eeprom parameters */
927 if (e1000_init_eeprom_params(hw)) {
928 e_err("EEPROM initialization failed\n");
932 /* before reading the EEPROM, reset the controller to
933 * put the device in a known good starting state */
937 /* make sure the EEPROM is good */
938 if (e1000_validate_eeprom_checksum(hw) < 0) {
939 e_err("The EEPROM Checksum Is Not Valid\n");
940 e1000_dump_eeprom(adapter);
942 * set MAC address to all zeroes to invalidate and temporary
943 * disable this device for the user. This blocks regular
944 * traffic while still permitting ethtool ioctls from reaching
945 * the hardware as well as allowing the user to run the
946 * interface after manually setting a hw addr using
949 memset(hw->mac_addr, 0, netdev->addr_len);
951 /* copy the MAC address out of the EEPROM */
952 if (e1000_read_mac_addr(hw))
953 e_err("EEPROM Read Error\n");
955 /* don't block initalization here due to bad MAC address */
956 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
957 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
959 if (!is_valid_ether_addr(netdev->perm_addr))
960 e_err("Invalid MAC Address\n");
962 e1000_get_bus_info(hw);
964 init_timer(&adapter->tx_fifo_stall_timer);
965 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
966 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
968 init_timer(&adapter->watchdog_timer);
969 adapter->watchdog_timer.function = &e1000_watchdog;
970 adapter->watchdog_timer.data = (unsigned long) adapter;
972 init_timer(&adapter->phy_info_timer);
973 adapter->phy_info_timer.function = &e1000_update_phy_info;
974 adapter->phy_info_timer.data = (unsigned long)adapter;
976 INIT_WORK(&adapter->reset_task, e1000_reset_task);
978 e1000_check_options(adapter);
980 /* Initial Wake on LAN setting
981 * If APM wake is enabled in the EEPROM,
982 * enable the ACPI Magic Packet filter
985 switch (hw->mac_type) {
986 case e1000_82542_rev2_0:
987 case e1000_82542_rev2_1:
991 e1000_read_eeprom(hw,
992 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
993 eeprom_apme_mask = E1000_EEPROM_82544_APM;
996 case e1000_82546_rev_3:
997 if (er32(STATUS) & E1000_STATUS_FUNC_1){
998 e1000_read_eeprom(hw,
999 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1004 e1000_read_eeprom(hw,
1005 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1008 if (eeprom_data & eeprom_apme_mask)
1009 adapter->eeprom_wol |= E1000_WUFC_MAG;
1011 /* now that we have the eeprom settings, apply the special cases
1012 * where the eeprom may be wrong or the board simply won't support
1013 * wake on lan on a particular port */
1014 switch (pdev->device) {
1015 case E1000_DEV_ID_82546GB_PCIE:
1016 adapter->eeprom_wol = 0;
1018 case E1000_DEV_ID_82546EB_FIBER:
1019 case E1000_DEV_ID_82546GB_FIBER:
1020 /* Wake events only supported on port A for dual fiber
1021 * regardless of eeprom setting */
1022 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1023 adapter->eeprom_wol = 0;
1025 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1026 /* if quad port adapter, disable WoL on all but port A */
1027 if (global_quad_port_a != 0)
1028 adapter->eeprom_wol = 0;
1030 adapter->quad_port_a = 1;
1031 /* Reset for multiple quad port adapters */
1032 if (++global_quad_port_a == 4)
1033 global_quad_port_a = 0;
1037 /* initialize the wol settings based on the eeprom settings */
1038 adapter->wol = adapter->eeprom_wol;
1039 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1041 /* reset the hardware with the new settings */
1042 e1000_reset(adapter);
1044 strcpy(netdev->name, "eth%d");
1045 err = register_netdev(netdev);
1049 /* print bus type/speed/width info */
1050 e_info("(PCI%s:%s:%s) ",
1051 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1052 ((hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1053 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1054 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1055 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1056 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" : "32-bit"));
1058 e_info("%pM\n", netdev->dev_addr);
1060 /* carrier off reporting is important to ethtool even BEFORE open */
1061 netif_carrier_off(netdev);
1063 e_info("Intel(R) PRO/1000 Network Connection\n");
1070 e1000_phy_hw_reset(hw);
1072 if (hw->flash_address)
1073 iounmap(hw->flash_address);
1074 kfree(adapter->tx_ring);
1075 kfree(adapter->rx_ring);
1077 iounmap(hw->hw_addr);
1079 free_netdev(netdev);
1081 pci_release_selected_regions(pdev, bars);
1084 pci_disable_device(pdev);
1089 * e1000_remove - Device Removal Routine
1090 * @pdev: PCI device information struct
1092 * e1000_remove is called by the PCI subsystem to alert the driver
1093 * that it should release a PCI device. The could be caused by a
1094 * Hot-Plug event, or because the driver is going to be removed from
1098 static void __devexit e1000_remove(struct pci_dev *pdev)
1100 struct net_device *netdev = pci_get_drvdata(pdev);
1101 struct e1000_adapter *adapter = netdev_priv(netdev);
1102 struct e1000_hw *hw = &adapter->hw;
1104 set_bit(__E1000_DOWN, &adapter->flags);
1105 del_timer_sync(&adapter->tx_fifo_stall_timer);
1106 del_timer_sync(&adapter->watchdog_timer);
1107 del_timer_sync(&adapter->phy_info_timer);
1109 cancel_work_sync(&adapter->reset_task);
1111 e1000_release_manageability(adapter);
1113 unregister_netdev(netdev);
1115 e1000_phy_hw_reset(hw);
1117 kfree(adapter->tx_ring);
1118 kfree(adapter->rx_ring);
1120 iounmap(hw->hw_addr);
1121 if (hw->flash_address)
1122 iounmap(hw->flash_address);
1123 pci_release_selected_regions(pdev, adapter->bars);
1125 free_netdev(netdev);
1127 pci_disable_device(pdev);
1131 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1132 * @adapter: board private structure to initialize
1134 * e1000_sw_init initializes the Adapter private data structure.
1135 * Fields are initialized based on PCI device information and
1136 * OS network device settings (MTU size).
1139 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1141 struct e1000_hw *hw = &adapter->hw;
1142 struct net_device *netdev = adapter->netdev;
1143 struct pci_dev *pdev = adapter->pdev;
1145 /* PCI config space info */
1147 hw->vendor_id = pdev->vendor;
1148 hw->device_id = pdev->device;
1149 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1150 hw->subsystem_id = pdev->subsystem_device;
1151 hw->revision_id = pdev->revision;
1153 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1155 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1156 hw->max_frame_size = netdev->mtu +
1157 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1158 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1160 /* identify the MAC */
1162 if (e1000_set_mac_type(hw)) {
1163 e_err("Unknown MAC Type\n");
1167 switch (hw->mac_type) {
1172 case e1000_82541_rev_2:
1173 case e1000_82547_rev_2:
1174 hw->phy_init_script = 1;
1178 e1000_set_media_type(hw);
1180 hw->wait_autoneg_complete = false;
1181 hw->tbi_compatibility_en = true;
1182 hw->adaptive_ifs = true;
1184 /* Copper options */
1186 if (hw->media_type == e1000_media_type_copper) {
1187 hw->mdix = AUTO_ALL_MODES;
1188 hw->disable_polarity_correction = false;
1189 hw->master_slave = E1000_MASTER_SLAVE;
1192 adapter->num_tx_queues = 1;
1193 adapter->num_rx_queues = 1;
1195 if (e1000_alloc_queues(adapter)) {
1196 e_err("Unable to allocate memory for queues\n");
1200 /* Explicitly disable IRQ since the NIC can be in any state. */
1201 e1000_irq_disable(adapter);
1203 spin_lock_init(&adapter->stats_lock);
1205 set_bit(__E1000_DOWN, &adapter->flags);
1211 * e1000_alloc_queues - Allocate memory for all rings
1212 * @adapter: board private structure to initialize
1214 * We allocate one ring per queue at run-time since we don't know the
1215 * number of queues at compile-time.
1218 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1220 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1221 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1222 if (!adapter->tx_ring)
1225 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1226 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1227 if (!adapter->rx_ring) {
1228 kfree(adapter->tx_ring);
1232 return E1000_SUCCESS;
1236 * e1000_open - Called when a network interface is made active
1237 * @netdev: network interface device structure
1239 * Returns 0 on success, negative value on failure
1241 * The open entry point is called when a network interface is made
1242 * active by the system (IFF_UP). At this point all resources needed
1243 * for transmit and receive operations are allocated, the interrupt
1244 * handler is registered with the OS, the watchdog timer is started,
1245 * and the stack is notified that the interface is ready.
1248 static int e1000_open(struct net_device *netdev)
1250 struct e1000_adapter *adapter = netdev_priv(netdev);
1251 struct e1000_hw *hw = &adapter->hw;
1254 /* disallow open during test */
1255 if (test_bit(__E1000_TESTING, &adapter->flags))
1258 netif_carrier_off(netdev);
1260 /* allocate transmit descriptors */
1261 err = e1000_setup_all_tx_resources(adapter);
1265 /* allocate receive descriptors */
1266 err = e1000_setup_all_rx_resources(adapter);
1270 e1000_power_up_phy(adapter);
1272 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1273 if ((hw->mng_cookie.status &
1274 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1275 e1000_update_mng_vlan(adapter);
1278 /* before we allocate an interrupt, we must be ready to handle it.
1279 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1280 * as soon as we call pci_request_irq, so we have to setup our
1281 * clean_rx handler before we do so. */
1282 e1000_configure(adapter);
1284 err = e1000_request_irq(adapter);
1288 /* From here on the code is the same as e1000_up() */
1289 clear_bit(__E1000_DOWN, &adapter->flags);
1291 napi_enable(&adapter->napi);
1293 e1000_irq_enable(adapter);
1295 netif_start_queue(netdev);
1297 /* fire a link status change interrupt to start the watchdog */
1298 ew32(ICS, E1000_ICS_LSC);
1300 return E1000_SUCCESS;
1303 e1000_power_down_phy(adapter);
1304 e1000_free_all_rx_resources(adapter);
1306 e1000_free_all_tx_resources(adapter);
1308 e1000_reset(adapter);
1314 * e1000_close - Disables a network interface
1315 * @netdev: network interface device structure
1317 * Returns 0, this is not allowed to fail
1319 * The close entry point is called when an interface is de-activated
1320 * by the OS. The hardware is still under the drivers control, but
1321 * needs to be disabled. A global MAC reset is issued to stop the
1322 * hardware, and all transmit and receive resources are freed.
1325 static int e1000_close(struct net_device *netdev)
1327 struct e1000_adapter *adapter = netdev_priv(netdev);
1328 struct e1000_hw *hw = &adapter->hw;
1330 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1331 e1000_down(adapter);
1332 e1000_power_down_phy(adapter);
1333 e1000_free_irq(adapter);
1335 e1000_free_all_tx_resources(adapter);
1336 e1000_free_all_rx_resources(adapter);
1338 /* kill manageability vlan ID if supported, but not if a vlan with
1339 * the same ID is registered on the host OS (let 8021q kill it) */
1340 if ((hw->mng_cookie.status &
1341 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1343 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1344 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1351 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1352 * @adapter: address of board private structure
1353 * @start: address of beginning of memory
1354 * @len: length of memory
1356 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1359 struct e1000_hw *hw = &adapter->hw;
1360 unsigned long begin = (unsigned long)start;
1361 unsigned long end = begin + len;
1363 /* First rev 82545 and 82546 need to not allow any memory
1364 * write location to cross 64k boundary due to errata 23 */
1365 if (hw->mac_type == e1000_82545 ||
1366 hw->mac_type == e1000_82546) {
1367 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1374 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1375 * @adapter: board private structure
1376 * @txdr: tx descriptor ring (for a specific queue) to setup
1378 * Return 0 on success, negative on failure
1381 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1382 struct e1000_tx_ring *txdr)
1384 struct pci_dev *pdev = adapter->pdev;
1387 size = sizeof(struct e1000_buffer) * txdr->count;
1388 txdr->buffer_info = vmalloc(size);
1389 if (!txdr->buffer_info) {
1390 e_err("Unable to allocate memory for the Tx descriptor ring\n");
1393 memset(txdr->buffer_info, 0, size);
1395 /* round up to nearest 4K */
1397 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1398 txdr->size = ALIGN(txdr->size, 4096);
1400 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1404 vfree(txdr->buffer_info);
1405 e_err("Unable to allocate memory for the Tx descriptor ring\n");
1409 /* Fix for errata 23, can't cross 64kB boundary */
1410 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1411 void *olddesc = txdr->desc;
1412 dma_addr_t olddma = txdr->dma;
1413 e_err("txdr align check failed: %u bytes at %p\n",
1414 txdr->size, txdr->desc);
1415 /* Try again, without freeing the previous */
1416 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1417 &txdr->dma, GFP_KERNEL);
1418 /* Failed allocation, critical failure */
1420 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1422 goto setup_tx_desc_die;
1425 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1427 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1429 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1431 e_err("Unable to allocate aligned memory "
1432 "for the transmit descriptor ring\n");
1433 vfree(txdr->buffer_info);
1436 /* Free old allocation, new allocation was successful */
1437 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1441 memset(txdr->desc, 0, txdr->size);
1443 txdr->next_to_use = 0;
1444 txdr->next_to_clean = 0;
1450 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1451 * (Descriptors) for all queues
1452 * @adapter: board private structure
1454 * Return 0 on success, negative on failure
1457 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1461 for (i = 0; i < adapter->num_tx_queues; i++) {
1462 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1464 e_err("Allocation for Tx Queue %u failed\n", i);
1465 for (i-- ; i >= 0; i--)
1466 e1000_free_tx_resources(adapter,
1467 &adapter->tx_ring[i]);
1476 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1477 * @adapter: board private structure
1479 * Configure the Tx unit of the MAC after a reset.
1482 static void e1000_configure_tx(struct e1000_adapter *adapter)
1485 struct e1000_hw *hw = &adapter->hw;
1486 u32 tdlen, tctl, tipg;
1489 /* Setup the HW Tx Head and Tail descriptor pointers */
1491 switch (adapter->num_tx_queues) {
1494 tdba = adapter->tx_ring[0].dma;
1495 tdlen = adapter->tx_ring[0].count *
1496 sizeof(struct e1000_tx_desc);
1498 ew32(TDBAH, (tdba >> 32));
1499 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1502 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1503 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1507 /* Set the default values for the Tx Inter Packet Gap timer */
1508 if ((hw->media_type == e1000_media_type_fiber ||
1509 hw->media_type == e1000_media_type_internal_serdes))
1510 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1512 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1514 switch (hw->mac_type) {
1515 case e1000_82542_rev2_0:
1516 case e1000_82542_rev2_1:
1517 tipg = DEFAULT_82542_TIPG_IPGT;
1518 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1519 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1522 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1523 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1526 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1527 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1530 /* Set the Tx Interrupt Delay register */
1532 ew32(TIDV, adapter->tx_int_delay);
1533 if (hw->mac_type >= e1000_82540)
1534 ew32(TADV, adapter->tx_abs_int_delay);
1536 /* Program the Transmit Control Register */
1539 tctl &= ~E1000_TCTL_CT;
1540 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1541 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1543 e1000_config_collision_dist(hw);
1545 /* Setup Transmit Descriptor Settings for eop descriptor */
1546 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1548 /* only set IDE if we are delaying interrupts using the timers */
1549 if (adapter->tx_int_delay)
1550 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1552 if (hw->mac_type < e1000_82543)
1553 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1555 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1557 /* Cache if we're 82544 running in PCI-X because we'll
1558 * need this to apply a workaround later in the send path. */
1559 if (hw->mac_type == e1000_82544 &&
1560 hw->bus_type == e1000_bus_type_pcix)
1561 adapter->pcix_82544 = 1;
1568 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1569 * @adapter: board private structure
1570 * @rxdr: rx descriptor ring (for a specific queue) to setup
1572 * Returns 0 on success, negative on failure
1575 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1576 struct e1000_rx_ring *rxdr)
1578 struct pci_dev *pdev = adapter->pdev;
1581 size = sizeof(struct e1000_buffer) * rxdr->count;
1582 rxdr->buffer_info = vmalloc(size);
1583 if (!rxdr->buffer_info) {
1584 e_err("Unable to allocate memory for the Rx descriptor ring\n");
1587 memset(rxdr->buffer_info, 0, size);
1589 desc_len = sizeof(struct e1000_rx_desc);
1591 /* Round up to nearest 4K */
1593 rxdr->size = rxdr->count * desc_len;
1594 rxdr->size = ALIGN(rxdr->size, 4096);
1596 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1600 e_err("Unable to allocate memory for the Rx descriptor ring\n");
1602 vfree(rxdr->buffer_info);
1606 /* Fix for errata 23, can't cross 64kB boundary */
1607 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1608 void *olddesc = rxdr->desc;
1609 dma_addr_t olddma = rxdr->dma;
1610 e_err("rxdr align check failed: %u bytes at %p\n",
1611 rxdr->size, rxdr->desc);
1612 /* Try again, without freeing the previous */
1613 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1614 &rxdr->dma, GFP_KERNEL);
1615 /* Failed allocation, critical failure */
1617 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1619 e_err("Unable to allocate memory for the Rx descriptor "
1621 goto setup_rx_desc_die;
1624 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1626 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1628 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1630 e_err("Unable to allocate aligned memory for the Rx "
1631 "descriptor ring\n");
1632 goto setup_rx_desc_die;
1634 /* Free old allocation, new allocation was successful */
1635 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1639 memset(rxdr->desc, 0, rxdr->size);
1641 rxdr->next_to_clean = 0;
1642 rxdr->next_to_use = 0;
1643 rxdr->rx_skb_top = NULL;
1649 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1650 * (Descriptors) for all queues
1651 * @adapter: board private structure
1653 * Return 0 on success, negative on failure
1656 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1660 for (i = 0; i < adapter->num_rx_queues; i++) {
1661 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1663 e_err("Allocation for Rx Queue %u failed\n", i);
1664 for (i-- ; i >= 0; i--)
1665 e1000_free_rx_resources(adapter,
1666 &adapter->rx_ring[i]);
1675 * e1000_setup_rctl - configure the receive control registers
1676 * @adapter: Board private structure
1678 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1680 struct e1000_hw *hw = &adapter->hw;
1685 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1687 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1688 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1689 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1691 if (hw->tbi_compatibility_on == 1)
1692 rctl |= E1000_RCTL_SBP;
1694 rctl &= ~E1000_RCTL_SBP;
1696 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1697 rctl &= ~E1000_RCTL_LPE;
1699 rctl |= E1000_RCTL_LPE;
1701 /* Setup buffer sizes */
1702 rctl &= ~E1000_RCTL_SZ_4096;
1703 rctl |= E1000_RCTL_BSEX;
1704 switch (adapter->rx_buffer_len) {
1705 case E1000_RXBUFFER_2048:
1707 rctl |= E1000_RCTL_SZ_2048;
1708 rctl &= ~E1000_RCTL_BSEX;
1710 case E1000_RXBUFFER_4096:
1711 rctl |= E1000_RCTL_SZ_4096;
1713 case E1000_RXBUFFER_8192:
1714 rctl |= E1000_RCTL_SZ_8192;
1716 case E1000_RXBUFFER_16384:
1717 rctl |= E1000_RCTL_SZ_16384;
1725 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1726 * @adapter: board private structure
1728 * Configure the Rx unit of the MAC after a reset.
1731 static void e1000_configure_rx(struct e1000_adapter *adapter)
1734 struct e1000_hw *hw = &adapter->hw;
1735 u32 rdlen, rctl, rxcsum;
1737 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1738 rdlen = adapter->rx_ring[0].count *
1739 sizeof(struct e1000_rx_desc);
1740 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1741 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1743 rdlen = adapter->rx_ring[0].count *
1744 sizeof(struct e1000_rx_desc);
1745 adapter->clean_rx = e1000_clean_rx_irq;
1746 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1749 /* disable receives while setting up the descriptors */
1751 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1753 /* set the Receive Delay Timer Register */
1754 ew32(RDTR, adapter->rx_int_delay);
1756 if (hw->mac_type >= e1000_82540) {
1757 ew32(RADV, adapter->rx_abs_int_delay);
1758 if (adapter->itr_setting != 0)
1759 ew32(ITR, 1000000000 / (adapter->itr * 256));
1762 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1763 * the Base and Length of the Rx Descriptor Ring */
1764 switch (adapter->num_rx_queues) {
1767 rdba = adapter->rx_ring[0].dma;
1769 ew32(RDBAH, (rdba >> 32));
1770 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1773 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1774 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1778 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1779 if (hw->mac_type >= e1000_82543) {
1780 rxcsum = er32(RXCSUM);
1781 if (adapter->rx_csum)
1782 rxcsum |= E1000_RXCSUM_TUOFL;
1784 /* don't need to clear IPPCSE as it defaults to 0 */
1785 rxcsum &= ~E1000_RXCSUM_TUOFL;
1786 ew32(RXCSUM, rxcsum);
1789 /* Enable Receives */
1794 * e1000_free_tx_resources - Free Tx Resources per Queue
1795 * @adapter: board private structure
1796 * @tx_ring: Tx descriptor ring for a specific queue
1798 * Free all transmit software resources
1801 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1802 struct e1000_tx_ring *tx_ring)
1804 struct pci_dev *pdev = adapter->pdev;
1806 e1000_clean_tx_ring(adapter, tx_ring);
1808 vfree(tx_ring->buffer_info);
1809 tx_ring->buffer_info = NULL;
1811 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1814 tx_ring->desc = NULL;
1818 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1819 * @adapter: board private structure
1821 * Free all transmit software resources
1824 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1828 for (i = 0; i < adapter->num_tx_queues; i++)
1829 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1832 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1833 struct e1000_buffer *buffer_info)
1835 if (buffer_info->dma) {
1836 if (buffer_info->mapped_as_page)
1837 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1838 buffer_info->length, DMA_TO_DEVICE);
1840 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1841 buffer_info->length,
1843 buffer_info->dma = 0;
1845 if (buffer_info->skb) {
1846 dev_kfree_skb_any(buffer_info->skb);
1847 buffer_info->skb = NULL;
1849 buffer_info->time_stamp = 0;
1850 /* buffer_info must be completely set up in the transmit path */
1854 * e1000_clean_tx_ring - Free Tx Buffers
1855 * @adapter: board private structure
1856 * @tx_ring: ring to be cleaned
1859 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1860 struct e1000_tx_ring *tx_ring)
1862 struct e1000_hw *hw = &adapter->hw;
1863 struct e1000_buffer *buffer_info;
1867 /* Free all the Tx ring sk_buffs */
1869 for (i = 0; i < tx_ring->count; i++) {
1870 buffer_info = &tx_ring->buffer_info[i];
1871 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1874 size = sizeof(struct e1000_buffer) * tx_ring->count;
1875 memset(tx_ring->buffer_info, 0, size);
1877 /* Zero out the descriptor ring */
1879 memset(tx_ring->desc, 0, tx_ring->size);
1881 tx_ring->next_to_use = 0;
1882 tx_ring->next_to_clean = 0;
1883 tx_ring->last_tx_tso = 0;
1885 writel(0, hw->hw_addr + tx_ring->tdh);
1886 writel(0, hw->hw_addr + tx_ring->tdt);
1890 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1891 * @adapter: board private structure
1894 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1898 for (i = 0; i < adapter->num_tx_queues; i++)
1899 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1903 * e1000_free_rx_resources - Free Rx Resources
1904 * @adapter: board private structure
1905 * @rx_ring: ring to clean the resources from
1907 * Free all receive software resources
1910 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
1911 struct e1000_rx_ring *rx_ring)
1913 struct pci_dev *pdev = adapter->pdev;
1915 e1000_clean_rx_ring(adapter, rx_ring);
1917 vfree(rx_ring->buffer_info);
1918 rx_ring->buffer_info = NULL;
1920 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1923 rx_ring->desc = NULL;
1927 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1928 * @adapter: board private structure
1930 * Free all receive software resources
1933 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1937 for (i = 0; i < adapter->num_rx_queues; i++)
1938 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1942 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1943 * @adapter: board private structure
1944 * @rx_ring: ring to free buffers from
1947 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
1948 struct e1000_rx_ring *rx_ring)
1950 struct e1000_hw *hw = &adapter->hw;
1951 struct e1000_buffer *buffer_info;
1952 struct pci_dev *pdev = adapter->pdev;
1956 /* Free all the Rx ring sk_buffs */
1957 for (i = 0; i < rx_ring->count; i++) {
1958 buffer_info = &rx_ring->buffer_info[i];
1959 if (buffer_info->dma &&
1960 adapter->clean_rx == e1000_clean_rx_irq) {
1961 dma_unmap_single(&pdev->dev, buffer_info->dma,
1962 buffer_info->length,
1964 } else if (buffer_info->dma &&
1965 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
1966 dma_unmap_page(&pdev->dev, buffer_info->dma,
1967 buffer_info->length,
1971 buffer_info->dma = 0;
1972 if (buffer_info->page) {
1973 put_page(buffer_info->page);
1974 buffer_info->page = NULL;
1976 if (buffer_info->skb) {
1977 dev_kfree_skb(buffer_info->skb);
1978 buffer_info->skb = NULL;
1982 /* there also may be some cached data from a chained receive */
1983 if (rx_ring->rx_skb_top) {
1984 dev_kfree_skb(rx_ring->rx_skb_top);
1985 rx_ring->rx_skb_top = NULL;
1988 size = sizeof(struct e1000_buffer) * rx_ring->count;
1989 memset(rx_ring->buffer_info, 0, size);
1991 /* Zero out the descriptor ring */
1992 memset(rx_ring->desc, 0, rx_ring->size);
1994 rx_ring->next_to_clean = 0;
1995 rx_ring->next_to_use = 0;
1997 writel(0, hw->hw_addr + rx_ring->rdh);
1998 writel(0, hw->hw_addr + rx_ring->rdt);
2002 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2003 * @adapter: board private structure
2006 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2010 for (i = 0; i < adapter->num_rx_queues; i++)
2011 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2014 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2015 * and memory write and invalidate disabled for certain operations
2017 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2019 struct e1000_hw *hw = &adapter->hw;
2020 struct net_device *netdev = adapter->netdev;
2023 e1000_pci_clear_mwi(hw);
2026 rctl |= E1000_RCTL_RST;
2028 E1000_WRITE_FLUSH();
2031 if (netif_running(netdev))
2032 e1000_clean_all_rx_rings(adapter);
2035 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2037 struct e1000_hw *hw = &adapter->hw;
2038 struct net_device *netdev = adapter->netdev;
2042 rctl &= ~E1000_RCTL_RST;
2044 E1000_WRITE_FLUSH();
2047 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2048 e1000_pci_set_mwi(hw);
2050 if (netif_running(netdev)) {
2051 /* No need to loop, because 82542 supports only 1 queue */
2052 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2053 e1000_configure_rx(adapter);
2054 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2059 * e1000_set_mac - Change the Ethernet Address of the NIC
2060 * @netdev: network interface device structure
2061 * @p: pointer to an address structure
2063 * Returns 0 on success, negative on failure
2066 static int e1000_set_mac(struct net_device *netdev, void *p)
2068 struct e1000_adapter *adapter = netdev_priv(netdev);
2069 struct e1000_hw *hw = &adapter->hw;
2070 struct sockaddr *addr = p;
2072 if (!is_valid_ether_addr(addr->sa_data))
2073 return -EADDRNOTAVAIL;
2075 /* 82542 2.0 needs to be in reset to write receive address registers */
2077 if (hw->mac_type == e1000_82542_rev2_0)
2078 e1000_enter_82542_rst(adapter);
2080 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2081 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2083 e1000_rar_set(hw, hw->mac_addr, 0);
2085 if (hw->mac_type == e1000_82542_rev2_0)
2086 e1000_leave_82542_rst(adapter);
2092 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2093 * @netdev: network interface device structure
2095 * The set_rx_mode entry point is called whenever the unicast or multicast
2096 * address lists or the network interface flags are updated. This routine is
2097 * responsible for configuring the hardware for proper unicast, multicast,
2098 * promiscuous mode, and all-multi behavior.
2101 static void e1000_set_rx_mode(struct net_device *netdev)
2103 struct e1000_adapter *adapter = netdev_priv(netdev);
2104 struct e1000_hw *hw = &adapter->hw;
2105 struct netdev_hw_addr *ha;
2106 bool use_uc = false;
2109 int i, rar_entries = E1000_RAR_ENTRIES;
2110 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2111 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2114 e_err("memory allocation failed\n");
2118 /* Check for Promiscuous and All Multicast modes */
2122 if (netdev->flags & IFF_PROMISC) {
2123 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2124 rctl &= ~E1000_RCTL_VFE;
2126 if (netdev->flags & IFF_ALLMULTI)
2127 rctl |= E1000_RCTL_MPE;
2129 rctl &= ~E1000_RCTL_MPE;
2130 /* Enable VLAN filter if there is a VLAN */
2132 rctl |= E1000_RCTL_VFE;
2135 if (netdev_uc_count(netdev) > rar_entries - 1) {
2136 rctl |= E1000_RCTL_UPE;
2137 } else if (!(netdev->flags & IFF_PROMISC)) {
2138 rctl &= ~E1000_RCTL_UPE;
2144 /* 82542 2.0 needs to be in reset to write receive address registers */
2146 if (hw->mac_type == e1000_82542_rev2_0)
2147 e1000_enter_82542_rst(adapter);
2149 /* load the first 14 addresses into the exact filters 1-14. Unicast
2150 * addresses take precedence to avoid disabling unicast filtering
2153 * RAR 0 is used for the station MAC adddress
2154 * if there are not 14 addresses, go ahead and clear the filters
2158 netdev_for_each_uc_addr(ha, netdev) {
2159 if (i == rar_entries)
2161 e1000_rar_set(hw, ha->addr, i++);
2164 WARN_ON(i == rar_entries);
2166 netdev_for_each_mc_addr(ha, netdev) {
2167 if (i == rar_entries) {
2168 /* load any remaining addresses into the hash table */
2169 u32 hash_reg, hash_bit, mta;
2170 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2171 hash_reg = (hash_value >> 5) & 0x7F;
2172 hash_bit = hash_value & 0x1F;
2173 mta = (1 << hash_bit);
2174 mcarray[hash_reg] |= mta;
2176 e1000_rar_set(hw, ha->addr, i++);
2180 for (; i < rar_entries; i++) {
2181 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2182 E1000_WRITE_FLUSH();
2183 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2184 E1000_WRITE_FLUSH();
2187 /* write the hash table completely, write from bottom to avoid
2188 * both stupid write combining chipsets, and flushing each write */
2189 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2191 * If we are on an 82544 has an errata where writing odd
2192 * offsets overwrites the previous even offset, but writing
2193 * backwards over the range solves the issue by always
2194 * writing the odd offset first
2196 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2198 E1000_WRITE_FLUSH();
2200 if (hw->mac_type == e1000_82542_rev2_0)
2201 e1000_leave_82542_rst(adapter);
2206 /* Need to wait a few seconds after link up to get diagnostic information from
2209 static void e1000_update_phy_info(unsigned long data)
2211 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2212 struct e1000_hw *hw = &adapter->hw;
2213 e1000_phy_get_info(hw, &adapter->phy_info);
2217 * e1000_82547_tx_fifo_stall - Timer Call-back
2218 * @data: pointer to adapter cast into an unsigned long
2221 static void e1000_82547_tx_fifo_stall(unsigned long data)
2223 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2224 struct e1000_hw *hw = &adapter->hw;
2225 struct net_device *netdev = adapter->netdev;
2228 if (atomic_read(&adapter->tx_fifo_stall)) {
2229 if ((er32(TDT) == er32(TDH)) &&
2230 (er32(TDFT) == er32(TDFH)) &&
2231 (er32(TDFTS) == er32(TDFHS))) {
2233 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2234 ew32(TDFT, adapter->tx_head_addr);
2235 ew32(TDFH, adapter->tx_head_addr);
2236 ew32(TDFTS, adapter->tx_head_addr);
2237 ew32(TDFHS, adapter->tx_head_addr);
2239 E1000_WRITE_FLUSH();
2241 adapter->tx_fifo_head = 0;
2242 atomic_set(&adapter->tx_fifo_stall, 0);
2243 netif_wake_queue(netdev);
2244 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2245 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2250 bool e1000_has_link(struct e1000_adapter *adapter)
2252 struct e1000_hw *hw = &adapter->hw;
2253 bool link_active = false;
2255 /* get_link_status is set on LSC (link status) interrupt or
2256 * rx sequence error interrupt. get_link_status will stay
2257 * false until the e1000_check_for_link establishes link
2258 * for copper adapters ONLY
2260 switch (hw->media_type) {
2261 case e1000_media_type_copper:
2262 if (hw->get_link_status) {
2263 e1000_check_for_link(hw);
2264 link_active = !hw->get_link_status;
2269 case e1000_media_type_fiber:
2270 e1000_check_for_link(hw);
2271 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2273 case e1000_media_type_internal_serdes:
2274 e1000_check_for_link(hw);
2275 link_active = hw->serdes_has_link;
2285 * e1000_watchdog - Timer Call-back
2286 * @data: pointer to adapter cast into an unsigned long
2288 static void e1000_watchdog(unsigned long data)
2290 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2291 struct e1000_hw *hw = &adapter->hw;
2292 struct net_device *netdev = adapter->netdev;
2293 struct e1000_tx_ring *txdr = adapter->tx_ring;
2296 link = e1000_has_link(adapter);
2297 if ((netif_carrier_ok(netdev)) && link)
2301 if (!netif_carrier_ok(netdev)) {
2304 /* update snapshot of PHY registers on LSC */
2305 e1000_get_speed_and_duplex(hw,
2306 &adapter->link_speed,
2307 &adapter->link_duplex);
2310 pr_info("%s NIC Link is Up %d Mbps %s, "
2311 "Flow Control: %s\n",
2313 adapter->link_speed,
2314 adapter->link_duplex == FULL_DUPLEX ?
2315 "Full Duplex" : "Half Duplex",
2316 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2317 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2318 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2319 E1000_CTRL_TFCE) ? "TX" : "None")));
2321 /* adjust timeout factor according to speed/duplex */
2322 adapter->tx_timeout_factor = 1;
2323 switch (adapter->link_speed) {
2326 adapter->tx_timeout_factor = 16;
2330 /* maybe add some timeout factor ? */
2334 /* enable transmits in the hardware */
2336 tctl |= E1000_TCTL_EN;
2339 netif_carrier_on(netdev);
2340 if (!test_bit(__E1000_DOWN, &adapter->flags))
2341 mod_timer(&adapter->phy_info_timer,
2342 round_jiffies(jiffies + 2 * HZ));
2343 adapter->smartspeed = 0;
2346 if (netif_carrier_ok(netdev)) {
2347 adapter->link_speed = 0;
2348 adapter->link_duplex = 0;
2349 pr_info("%s NIC Link is Down\n",
2351 netif_carrier_off(netdev);
2353 if (!test_bit(__E1000_DOWN, &adapter->flags))
2354 mod_timer(&adapter->phy_info_timer,
2355 round_jiffies(jiffies + 2 * HZ));
2358 e1000_smartspeed(adapter);
2362 e1000_update_stats(adapter);
2364 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2365 adapter->tpt_old = adapter->stats.tpt;
2366 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2367 adapter->colc_old = adapter->stats.colc;
2369 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2370 adapter->gorcl_old = adapter->stats.gorcl;
2371 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2372 adapter->gotcl_old = adapter->stats.gotcl;
2374 e1000_update_adaptive(hw);
2376 if (!netif_carrier_ok(netdev)) {
2377 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2378 /* We've lost link, so the controller stops DMA,
2379 * but we've got queued Tx work that's never going
2380 * to get done, so reset controller to flush Tx.
2381 * (Do the reset outside of interrupt context). */
2382 adapter->tx_timeout_count++;
2383 schedule_work(&adapter->reset_task);
2384 /* return immediately since reset is imminent */
2389 /* Simple mode for Interrupt Throttle Rate (ITR) */
2390 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2392 * Symmetric Tx/Rx gets a reduced ITR=2000;
2393 * Total asymmetrical Tx or Rx gets ITR=8000;
2394 * everyone else is between 2000-8000.
2396 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2397 u32 dif = (adapter->gotcl > adapter->gorcl ?
2398 adapter->gotcl - adapter->gorcl :
2399 adapter->gorcl - adapter->gotcl) / 10000;
2400 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2402 ew32(ITR, 1000000000 / (itr * 256));
2405 /* Cause software interrupt to ensure rx ring is cleaned */
2406 ew32(ICS, E1000_ICS_RXDMT0);
2408 /* Force detection of hung controller every watchdog period */
2409 adapter->detect_tx_hung = true;
2411 /* Reset the timer */
2412 if (!test_bit(__E1000_DOWN, &adapter->flags))
2413 mod_timer(&adapter->watchdog_timer,
2414 round_jiffies(jiffies + 2 * HZ));
2417 enum latency_range {
2421 latency_invalid = 255
2425 * e1000_update_itr - update the dynamic ITR value based on statistics
2426 * @adapter: pointer to adapter
2427 * @itr_setting: current adapter->itr
2428 * @packets: the number of packets during this measurement interval
2429 * @bytes: the number of bytes during this measurement interval
2431 * Stores a new ITR value based on packets and byte
2432 * counts during the last interrupt. The advantage of per interrupt
2433 * computation is faster updates and more accurate ITR for the current
2434 * traffic pattern. Constants in this function were computed
2435 * based on theoretical maximum wire speed and thresholds were set based
2436 * on testing data as well as attempting to minimize response time
2437 * while increasing bulk throughput.
2438 * this functionality is controlled by the InterruptThrottleRate module
2439 * parameter (see e1000_param.c)
2441 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2442 u16 itr_setting, int packets, int bytes)
2444 unsigned int retval = itr_setting;
2445 struct e1000_hw *hw = &adapter->hw;
2447 if (unlikely(hw->mac_type < e1000_82540))
2448 goto update_itr_done;
2451 goto update_itr_done;
2453 switch (itr_setting) {
2454 case lowest_latency:
2455 /* jumbo frames get bulk treatment*/
2456 if (bytes/packets > 8000)
2457 retval = bulk_latency;
2458 else if ((packets < 5) && (bytes > 512))
2459 retval = low_latency;
2461 case low_latency: /* 50 usec aka 20000 ints/s */
2462 if (bytes > 10000) {
2463 /* jumbo frames need bulk latency setting */
2464 if (bytes/packets > 8000)
2465 retval = bulk_latency;
2466 else if ((packets < 10) || ((bytes/packets) > 1200))
2467 retval = bulk_latency;
2468 else if ((packets > 35))
2469 retval = lowest_latency;
2470 } else if (bytes/packets > 2000)
2471 retval = bulk_latency;
2472 else if (packets <= 2 && bytes < 512)
2473 retval = lowest_latency;
2475 case bulk_latency: /* 250 usec aka 4000 ints/s */
2476 if (bytes > 25000) {
2478 retval = low_latency;
2479 } else if (bytes < 6000) {
2480 retval = low_latency;
2489 static void e1000_set_itr(struct e1000_adapter *adapter)
2491 struct e1000_hw *hw = &adapter->hw;
2493 u32 new_itr = adapter->itr;
2495 if (unlikely(hw->mac_type < e1000_82540))
2498 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2499 if (unlikely(adapter->link_speed != SPEED_1000)) {
2505 adapter->tx_itr = e1000_update_itr(adapter,
2507 adapter->total_tx_packets,
2508 adapter->total_tx_bytes);
2509 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2510 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2511 adapter->tx_itr = low_latency;
2513 adapter->rx_itr = e1000_update_itr(adapter,
2515 adapter->total_rx_packets,
2516 adapter->total_rx_bytes);
2517 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2518 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2519 adapter->rx_itr = low_latency;
2521 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2523 switch (current_itr) {
2524 /* counts and packets in update_itr are dependent on these numbers */
2525 case lowest_latency:
2529 new_itr = 20000; /* aka hwitr = ~200 */
2539 if (new_itr != adapter->itr) {
2540 /* this attempts to bias the interrupt rate towards Bulk
2541 * by adding intermediate steps when interrupt rate is
2543 new_itr = new_itr > adapter->itr ?
2544 min(adapter->itr + (new_itr >> 2), new_itr) :
2546 adapter->itr = new_itr;
2547 ew32(ITR, 1000000000 / (new_itr * 256));
2553 #define E1000_TX_FLAGS_CSUM 0x00000001
2554 #define E1000_TX_FLAGS_VLAN 0x00000002
2555 #define E1000_TX_FLAGS_TSO 0x00000004
2556 #define E1000_TX_FLAGS_IPV4 0x00000008
2557 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2558 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2560 static int e1000_tso(struct e1000_adapter *adapter,
2561 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2563 struct e1000_context_desc *context_desc;
2564 struct e1000_buffer *buffer_info;
2567 u16 ipcse = 0, tucse, mss;
2568 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2571 if (skb_is_gso(skb)) {
2572 if (skb_header_cloned(skb)) {
2573 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2578 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2579 mss = skb_shinfo(skb)->gso_size;
2580 if (skb->protocol == htons(ETH_P_IP)) {
2581 struct iphdr *iph = ip_hdr(skb);
2584 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2588 cmd_length = E1000_TXD_CMD_IP;
2589 ipcse = skb_transport_offset(skb) - 1;
2590 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2591 ipv6_hdr(skb)->payload_len = 0;
2592 tcp_hdr(skb)->check =
2593 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2594 &ipv6_hdr(skb)->daddr,
2598 ipcss = skb_network_offset(skb);
2599 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2600 tucss = skb_transport_offset(skb);
2601 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2604 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2605 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2607 i = tx_ring->next_to_use;
2608 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2609 buffer_info = &tx_ring->buffer_info[i];
2611 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2612 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2613 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2614 context_desc->upper_setup.tcp_fields.tucss = tucss;
2615 context_desc->upper_setup.tcp_fields.tucso = tucso;
2616 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2617 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2618 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2619 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2621 buffer_info->time_stamp = jiffies;
2622 buffer_info->next_to_watch = i;
2624 if (++i == tx_ring->count) i = 0;
2625 tx_ring->next_to_use = i;
2632 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2633 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2635 struct e1000_context_desc *context_desc;
2636 struct e1000_buffer *buffer_info;
2639 u32 cmd_len = E1000_TXD_CMD_DEXT;
2641 if (skb->ip_summed != CHECKSUM_PARTIAL)
2644 switch (skb->protocol) {
2645 case cpu_to_be16(ETH_P_IP):
2646 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2647 cmd_len |= E1000_TXD_CMD_TCP;
2649 case cpu_to_be16(ETH_P_IPV6):
2650 /* XXX not handling all IPV6 headers */
2651 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2652 cmd_len |= E1000_TXD_CMD_TCP;
2655 if (unlikely(net_ratelimit()))
2656 e_warn("checksum_partial proto=%x!\n", skb->protocol);
2660 css = skb_transport_offset(skb);
2662 i = tx_ring->next_to_use;
2663 buffer_info = &tx_ring->buffer_info[i];
2664 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2666 context_desc->lower_setup.ip_config = 0;
2667 context_desc->upper_setup.tcp_fields.tucss = css;
2668 context_desc->upper_setup.tcp_fields.tucso =
2669 css + skb->csum_offset;
2670 context_desc->upper_setup.tcp_fields.tucse = 0;
2671 context_desc->tcp_seg_setup.data = 0;
2672 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2674 buffer_info->time_stamp = jiffies;
2675 buffer_info->next_to_watch = i;
2677 if (unlikely(++i == tx_ring->count)) i = 0;
2678 tx_ring->next_to_use = i;
2683 #define E1000_MAX_TXD_PWR 12
2684 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2686 static int e1000_tx_map(struct e1000_adapter *adapter,
2687 struct e1000_tx_ring *tx_ring,
2688 struct sk_buff *skb, unsigned int first,
2689 unsigned int max_per_txd, unsigned int nr_frags,
2692 struct e1000_hw *hw = &adapter->hw;
2693 struct pci_dev *pdev = adapter->pdev;
2694 struct e1000_buffer *buffer_info;
2695 unsigned int len = skb_headlen(skb);
2696 unsigned int offset = 0, size, count = 0, i;
2699 i = tx_ring->next_to_use;
2702 buffer_info = &tx_ring->buffer_info[i];
2703 size = min(len, max_per_txd);
2704 /* Workaround for Controller erratum --
2705 * descriptor for non-tso packet in a linear SKB that follows a
2706 * tso gets written back prematurely before the data is fully
2707 * DMA'd to the controller */
2708 if (!skb->data_len && tx_ring->last_tx_tso &&
2710 tx_ring->last_tx_tso = 0;
2714 /* Workaround for premature desc write-backs
2715 * in TSO mode. Append 4-byte sentinel desc */
2716 if (unlikely(mss && !nr_frags && size == len && size > 8))
2718 /* work-around for errata 10 and it applies
2719 * to all controllers in PCI-X mode
2720 * The fix is to make sure that the first descriptor of a
2721 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2723 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2724 (size > 2015) && count == 0))
2727 /* Workaround for potential 82544 hang in PCI-X. Avoid
2728 * terminating buffers within evenly-aligned dwords. */
2729 if (unlikely(adapter->pcix_82544 &&
2730 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2734 buffer_info->length = size;
2735 /* set time_stamp *before* dma to help avoid a possible race */
2736 buffer_info->time_stamp = jiffies;
2737 buffer_info->mapped_as_page = false;
2738 buffer_info->dma = dma_map_single(&pdev->dev,
2740 size, DMA_TO_DEVICE);
2741 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2743 buffer_info->next_to_watch = i;
2750 if (unlikely(i == tx_ring->count))
2755 for (f = 0; f < nr_frags; f++) {
2756 struct skb_frag_struct *frag;
2758 frag = &skb_shinfo(skb)->frags[f];
2760 offset = frag->page_offset;
2764 if (unlikely(i == tx_ring->count))
2767 buffer_info = &tx_ring->buffer_info[i];
2768 size = min(len, max_per_txd);
2769 /* Workaround for premature desc write-backs
2770 * in TSO mode. Append 4-byte sentinel desc */
2771 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2773 /* Workaround for potential 82544 hang in PCI-X.
2774 * Avoid terminating buffers within evenly-aligned
2776 if (unlikely(adapter->pcix_82544 &&
2777 !((unsigned long)(page_to_phys(frag->page) + offset
2782 buffer_info->length = size;
2783 buffer_info->time_stamp = jiffies;
2784 buffer_info->mapped_as_page = true;
2785 buffer_info->dma = dma_map_page(&pdev->dev, frag->page,
2788 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2790 buffer_info->next_to_watch = i;
2798 tx_ring->buffer_info[i].skb = skb;
2799 tx_ring->buffer_info[first].next_to_watch = i;
2804 dev_err(&pdev->dev, "TX DMA map failed\n");
2805 buffer_info->dma = 0;
2811 i += tx_ring->count;
2813 buffer_info = &tx_ring->buffer_info[i];
2814 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2820 static void e1000_tx_queue(struct e1000_adapter *adapter,
2821 struct e1000_tx_ring *tx_ring, int tx_flags,
2824 struct e1000_hw *hw = &adapter->hw;
2825 struct e1000_tx_desc *tx_desc = NULL;
2826 struct e1000_buffer *buffer_info;
2827 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2830 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2831 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2833 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2835 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2836 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2839 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2840 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2841 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2844 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2845 txd_lower |= E1000_TXD_CMD_VLE;
2846 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2849 i = tx_ring->next_to_use;
2852 buffer_info = &tx_ring->buffer_info[i];
2853 tx_desc = E1000_TX_DESC(*tx_ring, i);
2854 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2855 tx_desc->lower.data =
2856 cpu_to_le32(txd_lower | buffer_info->length);
2857 tx_desc->upper.data = cpu_to_le32(txd_upper);
2858 if (unlikely(++i == tx_ring->count)) i = 0;
2861 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2863 /* Force memory writes to complete before letting h/w
2864 * know there are new descriptors to fetch. (Only
2865 * applicable for weak-ordered memory model archs,
2866 * such as IA-64). */
2869 tx_ring->next_to_use = i;
2870 writel(i, hw->hw_addr + tx_ring->tdt);
2871 /* we need this if more than one processor can write to our tail
2872 * at a time, it syncronizes IO on IA64/Altix systems */
2877 * 82547 workaround to avoid controller hang in half-duplex environment.
2878 * The workaround is to avoid queuing a large packet that would span
2879 * the internal Tx FIFO ring boundary by notifying the stack to resend
2880 * the packet at a later time. This gives the Tx FIFO an opportunity to
2881 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2882 * to the beginning of the Tx FIFO.
2885 #define E1000_FIFO_HDR 0x10
2886 #define E1000_82547_PAD_LEN 0x3E0
2888 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
2889 struct sk_buff *skb)
2891 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2892 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
2894 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
2896 if (adapter->link_duplex != HALF_DUPLEX)
2897 goto no_fifo_stall_required;
2899 if (atomic_read(&adapter->tx_fifo_stall))
2902 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2903 atomic_set(&adapter->tx_fifo_stall, 1);
2907 no_fifo_stall_required:
2908 adapter->tx_fifo_head += skb_fifo_len;
2909 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2910 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2914 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
2916 struct e1000_adapter *adapter = netdev_priv(netdev);
2917 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
2919 netif_stop_queue(netdev);
2920 /* Herbert's original patch had:
2921 * smp_mb__after_netif_stop_queue();
2922 * but since that doesn't exist yet, just open code it. */
2925 /* We need to check again in a case another CPU has just
2926 * made room available. */
2927 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
2931 netif_start_queue(netdev);
2932 ++adapter->restart_queue;
2936 static int e1000_maybe_stop_tx(struct net_device *netdev,
2937 struct e1000_tx_ring *tx_ring, int size)
2939 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
2941 return __e1000_maybe_stop_tx(netdev, size);
2944 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2945 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
2946 struct net_device *netdev)
2948 struct e1000_adapter *adapter = netdev_priv(netdev);
2949 struct e1000_hw *hw = &adapter->hw;
2950 struct e1000_tx_ring *tx_ring;
2951 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2952 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2953 unsigned int tx_flags = 0;
2954 unsigned int len = skb_headlen(skb);
2955 unsigned int nr_frags;
2961 /* This goes back to the question of how to logically map a tx queue
2962 * to a flow. Right now, performance is impacted slightly negatively
2963 * if using multiple tx queues. If the stack breaks away from a
2964 * single qdisc implementation, we can look at this again. */
2965 tx_ring = adapter->tx_ring;
2967 if (unlikely(skb->len <= 0)) {
2968 dev_kfree_skb_any(skb);
2969 return NETDEV_TX_OK;
2972 mss = skb_shinfo(skb)->gso_size;
2973 /* The controller does a simple calculation to
2974 * make sure there is enough room in the FIFO before
2975 * initiating the DMA for each buffer. The calc is:
2976 * 4 = ceil(buffer len/mss). To make sure we don't
2977 * overrun the FIFO, adjust the max buffer len if mss
2981 max_per_txd = min(mss << 2, max_per_txd);
2982 max_txd_pwr = fls(max_per_txd) - 1;
2984 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2985 if (skb->data_len && hdr_len == len) {
2986 switch (hw->mac_type) {
2987 unsigned int pull_size;
2989 /* Make sure we have room to chop off 4 bytes,
2990 * and that the end alignment will work out to
2991 * this hardware's requirements
2992 * NOTE: this is a TSO only workaround
2993 * if end byte alignment not correct move us
2994 * into the next dword */
2995 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
2998 pull_size = min((unsigned int)4, skb->data_len);
2999 if (!__pskb_pull_tail(skb, pull_size)) {
3000 e_err("__pskb_pull_tail failed.\n");
3001 dev_kfree_skb_any(skb);
3002 return NETDEV_TX_OK;
3004 len = skb_headlen(skb);
3013 /* reserve a descriptor for the offload context */
3014 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3018 /* Controller Erratum workaround */
3019 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3022 count += TXD_USE_COUNT(len, max_txd_pwr);
3024 if (adapter->pcix_82544)
3027 /* work-around for errata 10 and it applies to all controllers
3028 * in PCI-X mode, so add one more descriptor to the count
3030 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3034 nr_frags = skb_shinfo(skb)->nr_frags;
3035 for (f = 0; f < nr_frags; f++)
3036 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3038 if (adapter->pcix_82544)
3041 /* need: count + 2 desc gap to keep tail from touching
3042 * head, otherwise try next time */
3043 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3044 return NETDEV_TX_BUSY;
3046 if (unlikely(hw->mac_type == e1000_82547)) {
3047 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3048 netif_stop_queue(netdev);
3049 if (!test_bit(__E1000_DOWN, &adapter->flags))
3050 mod_timer(&adapter->tx_fifo_stall_timer,
3052 return NETDEV_TX_BUSY;
3056 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3057 tx_flags |= E1000_TX_FLAGS_VLAN;
3058 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3061 first = tx_ring->next_to_use;
3063 tso = e1000_tso(adapter, tx_ring, skb);
3065 dev_kfree_skb_any(skb);
3066 return NETDEV_TX_OK;
3070 if (likely(hw->mac_type != e1000_82544))
3071 tx_ring->last_tx_tso = 1;
3072 tx_flags |= E1000_TX_FLAGS_TSO;
3073 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3074 tx_flags |= E1000_TX_FLAGS_CSUM;
3076 if (likely(skb->protocol == htons(ETH_P_IP)))
3077 tx_flags |= E1000_TX_FLAGS_IPV4;
3079 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3083 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3084 /* Make sure there is space in the ring for the next send. */
3085 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3088 dev_kfree_skb_any(skb);
3089 tx_ring->buffer_info[first].time_stamp = 0;
3090 tx_ring->next_to_use = first;
3093 return NETDEV_TX_OK;
3097 * e1000_tx_timeout - Respond to a Tx Hang
3098 * @netdev: network interface device structure
3101 static void e1000_tx_timeout(struct net_device *netdev)
3103 struct e1000_adapter *adapter = netdev_priv(netdev);
3105 /* Do the reset outside of interrupt context */
3106 adapter->tx_timeout_count++;
3107 schedule_work(&adapter->reset_task);
3110 static void e1000_reset_task(struct work_struct *work)
3112 struct e1000_adapter *adapter =
3113 container_of(work, struct e1000_adapter, reset_task);
3115 e1000_reinit_locked(adapter);
3119 * e1000_get_stats - Get System Network Statistics
3120 * @netdev: network interface device structure
3122 * Returns the address of the device statistics structure.
3123 * The statistics are actually updated from the timer callback.
3126 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3128 /* only return the current stats */
3129 return &netdev->stats;
3133 * e1000_change_mtu - Change the Maximum Transfer Unit
3134 * @netdev: network interface device structure
3135 * @new_mtu: new value for maximum frame size
3137 * Returns 0 on success, negative on failure
3140 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3142 struct e1000_adapter *adapter = netdev_priv(netdev);
3143 struct e1000_hw *hw = &adapter->hw;
3144 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3146 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3147 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3148 e_err("Invalid MTU setting\n");
3152 /* Adapter-specific max frame size limits. */
3153 switch (hw->mac_type) {
3154 case e1000_undefined ... e1000_82542_rev2_1:
3155 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3156 e_err("Jumbo Frames not supported.\n");
3161 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3165 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3167 /* e1000_down has a dependency on max_frame_size */
3168 hw->max_frame_size = max_frame;
3169 if (netif_running(netdev))
3170 e1000_down(adapter);
3172 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3173 * means we reserve 2 more, this pushes us to allocate from the next
3175 * i.e. RXBUFFER_2048 --> size-4096 slab
3176 * however with the new *_jumbo_rx* routines, jumbo receives will use
3177 * fragmented skbs */
3179 if (max_frame <= E1000_RXBUFFER_2048)
3180 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3182 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3183 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3184 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3185 adapter->rx_buffer_len = PAGE_SIZE;
3188 /* adjust allocation if LPE protects us, and we aren't using SBP */
3189 if (!hw->tbi_compatibility_on &&
3190 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3191 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3192 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3194 pr_info("%s changing MTU from %d to %d\n",
3195 netdev->name, netdev->mtu, new_mtu);
3196 netdev->mtu = new_mtu;
3198 if (netif_running(netdev))
3201 e1000_reset(adapter);
3203 clear_bit(__E1000_RESETTING, &adapter->flags);
3209 * e1000_update_stats - Update the board statistics counters
3210 * @adapter: board private structure
3213 void e1000_update_stats(struct e1000_adapter *adapter)
3215 struct net_device *netdev = adapter->netdev;
3216 struct e1000_hw *hw = &adapter->hw;
3217 struct pci_dev *pdev = adapter->pdev;
3218 unsigned long flags;
3221 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3224 * Prevent stats update while adapter is being reset, or if the pci
3225 * connection is down.
3227 if (adapter->link_speed == 0)
3229 if (pci_channel_offline(pdev))
3232 spin_lock_irqsave(&adapter->stats_lock, flags);
3234 /* these counters are modified from e1000_tbi_adjust_stats,
3235 * called from the interrupt context, so they must only
3236 * be written while holding adapter->stats_lock
3239 adapter->stats.crcerrs += er32(CRCERRS);
3240 adapter->stats.gprc += er32(GPRC);
3241 adapter->stats.gorcl += er32(GORCL);
3242 adapter->stats.gorch += er32(GORCH);
3243 adapter->stats.bprc += er32(BPRC);
3244 adapter->stats.mprc += er32(MPRC);
3245 adapter->stats.roc += er32(ROC);
3247 adapter->stats.prc64 += er32(PRC64);
3248 adapter->stats.prc127 += er32(PRC127);
3249 adapter->stats.prc255 += er32(PRC255);
3250 adapter->stats.prc511 += er32(PRC511);
3251 adapter->stats.prc1023 += er32(PRC1023);
3252 adapter->stats.prc1522 += er32(PRC1522);
3254 adapter->stats.symerrs += er32(SYMERRS);
3255 adapter->stats.mpc += er32(MPC);
3256 adapter->stats.scc += er32(SCC);
3257 adapter->stats.ecol += er32(ECOL);
3258 adapter->stats.mcc += er32(MCC);
3259 adapter->stats.latecol += er32(LATECOL);
3260 adapter->stats.dc += er32(DC);
3261 adapter->stats.sec += er32(SEC);
3262 adapter->stats.rlec += er32(RLEC);
3263 adapter->stats.xonrxc += er32(XONRXC);
3264 adapter->stats.xontxc += er32(XONTXC);
3265 adapter->stats.xoffrxc += er32(XOFFRXC);
3266 adapter->stats.xofftxc += er32(XOFFTXC);
3267 adapter->stats.fcruc += er32(FCRUC);
3268 adapter->stats.gptc += er32(GPTC);
3269 adapter->stats.gotcl += er32(GOTCL);
3270 adapter->stats.gotch += er32(GOTCH);
3271 adapter->stats.rnbc += er32(RNBC);
3272 adapter->stats.ruc += er32(RUC);
3273 adapter->stats.rfc += er32(RFC);
3274 adapter->stats.rjc += er32(RJC);
3275 adapter->stats.torl += er32(TORL);
3276 adapter->stats.torh += er32(TORH);
3277 adapter->stats.totl += er32(TOTL);
3278 adapter->stats.toth += er32(TOTH);
3279 adapter->stats.tpr += er32(TPR);
3281 adapter->stats.ptc64 += er32(PTC64);
3282 adapter->stats.ptc127 += er32(PTC127);
3283 adapter->stats.ptc255 += er32(PTC255);
3284 adapter->stats.ptc511 += er32(PTC511);
3285 adapter->stats.ptc1023 += er32(PTC1023);
3286 adapter->stats.ptc1522 += er32(PTC1522);
3288 adapter->stats.mptc += er32(MPTC);
3289 adapter->stats.bptc += er32(BPTC);
3291 /* used for adaptive IFS */
3293 hw->tx_packet_delta = er32(TPT);
3294 adapter->stats.tpt += hw->tx_packet_delta;
3295 hw->collision_delta = er32(COLC);
3296 adapter->stats.colc += hw->collision_delta;
3298 if (hw->mac_type >= e1000_82543) {
3299 adapter->stats.algnerrc += er32(ALGNERRC);
3300 adapter->stats.rxerrc += er32(RXERRC);
3301 adapter->stats.tncrs += er32(TNCRS);
3302 adapter->stats.cexterr += er32(CEXTERR);
3303 adapter->stats.tsctc += er32(TSCTC);
3304 adapter->stats.tsctfc += er32(TSCTFC);
3307 /* Fill out the OS statistics structure */
3308 netdev->stats.multicast = adapter->stats.mprc;
3309 netdev->stats.collisions = adapter->stats.colc;
3313 /* RLEC on some newer hardware can be incorrect so build
3314 * our own version based on RUC and ROC */
3315 netdev->stats.rx_errors = adapter->stats.rxerrc +
3316 adapter->stats.crcerrs + adapter->stats.algnerrc +
3317 adapter->stats.ruc + adapter->stats.roc +
3318 adapter->stats.cexterr;
3319 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3320 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3321 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3322 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3323 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3326 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3327 netdev->stats.tx_errors = adapter->stats.txerrc;
3328 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3329 netdev->stats.tx_window_errors = adapter->stats.latecol;
3330 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3331 if (hw->bad_tx_carr_stats_fd &&
3332 adapter->link_duplex == FULL_DUPLEX) {
3333 netdev->stats.tx_carrier_errors = 0;
3334 adapter->stats.tncrs = 0;
3337 /* Tx Dropped needs to be maintained elsewhere */
3340 if (hw->media_type == e1000_media_type_copper) {
3341 if ((adapter->link_speed == SPEED_1000) &&
3342 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3343 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3344 adapter->phy_stats.idle_errors += phy_tmp;
3347 if ((hw->mac_type <= e1000_82546) &&
3348 (hw->phy_type == e1000_phy_m88) &&
3349 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3350 adapter->phy_stats.receive_errors += phy_tmp;
3353 /* Management Stats */
3354 if (hw->has_smbus) {
3355 adapter->stats.mgptc += er32(MGTPTC);
3356 adapter->stats.mgprc += er32(MGTPRC);
3357 adapter->stats.mgpdc += er32(MGTPDC);
3360 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3364 * e1000_intr - Interrupt Handler
3365 * @irq: interrupt number
3366 * @data: pointer to a network interface device structure
3369 static irqreturn_t e1000_intr(int irq, void *data)
3371 struct net_device *netdev = data;
3372 struct e1000_adapter *adapter = netdev_priv(netdev);
3373 struct e1000_hw *hw = &adapter->hw;
3374 u32 icr = er32(ICR);
3376 if (unlikely((!icr) || test_bit(__E1000_DOWN, &adapter->flags)))
3377 return IRQ_NONE; /* Not our interrupt */
3379 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3380 hw->get_link_status = 1;
3381 /* guard against interrupt when we're going down */
3382 if (!test_bit(__E1000_DOWN, &adapter->flags))
3383 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3386 /* disable interrupts, without the synchronize_irq bit */
3388 E1000_WRITE_FLUSH();
3390 if (likely(napi_schedule_prep(&adapter->napi))) {
3391 adapter->total_tx_bytes = 0;
3392 adapter->total_tx_packets = 0;
3393 adapter->total_rx_bytes = 0;
3394 adapter->total_rx_packets = 0;
3395 __napi_schedule(&adapter->napi);
3397 /* this really should not happen! if it does it is basically a
3398 * bug, but not a hard error, so enable ints and continue */
3399 if (!test_bit(__E1000_DOWN, &adapter->flags))
3400 e1000_irq_enable(adapter);
3407 * e1000_clean - NAPI Rx polling callback
3408 * @adapter: board private structure
3410 static int e1000_clean(struct napi_struct *napi, int budget)
3412 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3413 int tx_clean_complete = 0, work_done = 0;
3415 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3417 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3419 if (!tx_clean_complete)
3422 /* If budget not fully consumed, exit the polling mode */
3423 if (work_done < budget) {
3424 if (likely(adapter->itr_setting & 3))
3425 e1000_set_itr(adapter);
3426 napi_complete(napi);
3427 if (!test_bit(__E1000_DOWN, &adapter->flags))
3428 e1000_irq_enable(adapter);
3435 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3436 * @adapter: board private structure
3438 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3439 struct e1000_tx_ring *tx_ring)
3441 struct e1000_hw *hw = &adapter->hw;
3442 struct net_device *netdev = adapter->netdev;
3443 struct e1000_tx_desc *tx_desc, *eop_desc;
3444 struct e1000_buffer *buffer_info;
3445 unsigned int i, eop;
3446 unsigned int count = 0;
3447 unsigned int total_tx_bytes=0, total_tx_packets=0;
3449 i = tx_ring->next_to_clean;
3450 eop = tx_ring->buffer_info[i].next_to_watch;
3451 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3453 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3454 (count < tx_ring->count)) {
3455 bool cleaned = false;
3456 for ( ; !cleaned; count++) {
3457 tx_desc = E1000_TX_DESC(*tx_ring, i);
3458 buffer_info = &tx_ring->buffer_info[i];
3459 cleaned = (i == eop);
3462 struct sk_buff *skb = buffer_info->skb;
3463 unsigned int segs, bytecount;
3464 segs = skb_shinfo(skb)->gso_segs ?: 1;
3465 /* multiply data chunks by size of headers */
3466 bytecount = ((segs - 1) * skb_headlen(skb)) +
3468 total_tx_packets += segs;
3469 total_tx_bytes += bytecount;
3471 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3472 tx_desc->upper.data = 0;
3474 if (unlikely(++i == tx_ring->count)) i = 0;
3477 eop = tx_ring->buffer_info[i].next_to_watch;
3478 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3481 tx_ring->next_to_clean = i;
3483 #define TX_WAKE_THRESHOLD 32
3484 if (unlikely(count && netif_carrier_ok(netdev) &&
3485 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3486 /* Make sure that anybody stopping the queue after this
3487 * sees the new next_to_clean.
3491 if (netif_queue_stopped(netdev) &&
3492 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3493 netif_wake_queue(netdev);
3494 ++adapter->restart_queue;
3498 if (adapter->detect_tx_hung) {
3499 /* Detect a transmit hang in hardware, this serializes the
3500 * check with the clearing of time_stamp and movement of i */
3501 adapter->detect_tx_hung = false;
3502 if (tx_ring->buffer_info[eop].time_stamp &&
3503 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3504 (adapter->tx_timeout_factor * HZ)) &&
3505 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3507 /* detected Tx unit hang */
3508 e_err("Detected Tx Unit Hang\n"
3512 " next_to_use <%x>\n"
3513 " next_to_clean <%x>\n"
3514 "buffer_info[next_to_clean]\n"
3515 " time_stamp <%lx>\n"
3516 " next_to_watch <%x>\n"
3518 " next_to_watch.status <%x>\n",
3519 (unsigned long)((tx_ring - adapter->tx_ring) /
3520 sizeof(struct e1000_tx_ring)),
3521 readl(hw->hw_addr + tx_ring->tdh),
3522 readl(hw->hw_addr + tx_ring->tdt),
3523 tx_ring->next_to_use,
3524 tx_ring->next_to_clean,
3525 tx_ring->buffer_info[eop].time_stamp,
3528 eop_desc->upper.fields.status);
3529 netif_stop_queue(netdev);
3532 adapter->total_tx_bytes += total_tx_bytes;
3533 adapter->total_tx_packets += total_tx_packets;
3534 netdev->stats.tx_bytes += total_tx_bytes;
3535 netdev->stats.tx_packets += total_tx_packets;
3536 return (count < tx_ring->count);
3540 * e1000_rx_checksum - Receive Checksum Offload for 82543
3541 * @adapter: board private structure
3542 * @status_err: receive descriptor status and error fields
3543 * @csum: receive descriptor csum field
3544 * @sk_buff: socket buffer with received data
3547 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3548 u32 csum, struct sk_buff *skb)
3550 struct e1000_hw *hw = &adapter->hw;
3551 u16 status = (u16)status_err;
3552 u8 errors = (u8)(status_err >> 24);
3553 skb->ip_summed = CHECKSUM_NONE;
3555 /* 82543 or newer only */
3556 if (unlikely(hw->mac_type < e1000_82543)) return;
3557 /* Ignore Checksum bit is set */
3558 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3559 /* TCP/UDP checksum error bit is set */
3560 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3561 /* let the stack verify checksum errors */
3562 adapter->hw_csum_err++;
3565 /* TCP/UDP Checksum has not been calculated */
3566 if (!(status & E1000_RXD_STAT_TCPCS))
3569 /* It must be a TCP or UDP packet with a valid checksum */
3570 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3571 /* TCP checksum is good */
3572 skb->ip_summed = CHECKSUM_UNNECESSARY;
3574 adapter->hw_csum_good++;
3578 * e1000_consume_page - helper function
3580 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3585 skb->data_len += length;
3586 skb->truesize += length;
3590 * e1000_receive_skb - helper function to handle rx indications
3591 * @adapter: board private structure
3592 * @status: descriptor status field as written by hardware
3593 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3594 * @skb: pointer to sk_buff to be indicated to stack
3596 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3597 __le16 vlan, struct sk_buff *skb)
3599 if (unlikely(adapter->vlgrp && (status & E1000_RXD_STAT_VP))) {
3600 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3602 E1000_RXD_SPC_VLAN_MASK);
3604 netif_receive_skb(skb);
3609 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3610 * @adapter: board private structure
3611 * @rx_ring: ring to clean
3612 * @work_done: amount of napi work completed this call
3613 * @work_to_do: max amount of work allowed for this call to do
3615 * the return value indicates whether actual cleaning was done, there
3616 * is no guarantee that everything was cleaned
3618 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3619 struct e1000_rx_ring *rx_ring,
3620 int *work_done, int work_to_do)
3622 struct e1000_hw *hw = &adapter->hw;
3623 struct net_device *netdev = adapter->netdev;
3624 struct pci_dev *pdev = adapter->pdev;
3625 struct e1000_rx_desc *rx_desc, *next_rxd;
3626 struct e1000_buffer *buffer_info, *next_buffer;
3627 unsigned long irq_flags;
3630 int cleaned_count = 0;
3631 bool cleaned = false;
3632 unsigned int total_rx_bytes=0, total_rx_packets=0;
3634 i = rx_ring->next_to_clean;
3635 rx_desc = E1000_RX_DESC(*rx_ring, i);
3636 buffer_info = &rx_ring->buffer_info[i];
3638 while (rx_desc->status & E1000_RXD_STAT_DD) {
3639 struct sk_buff *skb;
3642 if (*work_done >= work_to_do)
3646 status = rx_desc->status;
3647 skb = buffer_info->skb;
3648 buffer_info->skb = NULL;
3650 if (++i == rx_ring->count) i = 0;
3651 next_rxd = E1000_RX_DESC(*rx_ring, i);
3654 next_buffer = &rx_ring->buffer_info[i];
3658 dma_unmap_page(&pdev->dev, buffer_info->dma,
3659 buffer_info->length, DMA_FROM_DEVICE);
3660 buffer_info->dma = 0;
3662 length = le16_to_cpu(rx_desc->length);
3664 /* errors is only valid for DD + EOP descriptors */
3665 if (unlikely((status & E1000_RXD_STAT_EOP) &&
3666 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
3667 u8 last_byte = *(skb->data + length - 1);
3668 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
3670 spin_lock_irqsave(&adapter->stats_lock,
3672 e1000_tbi_adjust_stats(hw, &adapter->stats,
3674 spin_unlock_irqrestore(&adapter->stats_lock,
3678 /* recycle both page and skb */
3679 buffer_info->skb = skb;
3680 /* an error means any chain goes out the window
3682 if (rx_ring->rx_skb_top)
3683 dev_kfree_skb(rx_ring->rx_skb_top);
3684 rx_ring->rx_skb_top = NULL;
3689 #define rxtop rx_ring->rx_skb_top
3690 if (!(status & E1000_RXD_STAT_EOP)) {
3691 /* this descriptor is only the beginning (or middle) */
3693 /* this is the beginning of a chain */
3695 skb_fill_page_desc(rxtop, 0, buffer_info->page,
3698 /* this is the middle of a chain */
3699 skb_fill_page_desc(rxtop,
3700 skb_shinfo(rxtop)->nr_frags,
3701 buffer_info->page, 0, length);
3702 /* re-use the skb, only consumed the page */
3703 buffer_info->skb = skb;
3705 e1000_consume_page(buffer_info, rxtop, length);
3709 /* end of the chain */
3710 skb_fill_page_desc(rxtop,
3711 skb_shinfo(rxtop)->nr_frags,
3712 buffer_info->page, 0, length);
3713 /* re-use the current skb, we only consumed the
3715 buffer_info->skb = skb;
3718 e1000_consume_page(buffer_info, skb, length);
3720 /* no chain, got EOP, this buf is the packet
3721 * copybreak to save the put_page/alloc_page */
3722 if (length <= copybreak &&
3723 skb_tailroom(skb) >= length) {
3725 vaddr = kmap_atomic(buffer_info->page,
3726 KM_SKB_DATA_SOFTIRQ);
3727 memcpy(skb_tail_pointer(skb), vaddr, length);
3728 kunmap_atomic(vaddr,
3729 KM_SKB_DATA_SOFTIRQ);
3730 /* re-use the page, so don't erase
3731 * buffer_info->page */
3732 skb_put(skb, length);
3734 skb_fill_page_desc(skb, 0,
3735 buffer_info->page, 0,
3737 e1000_consume_page(buffer_info, skb,
3743 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3744 e1000_rx_checksum(adapter,
3746 ((u32)(rx_desc->errors) << 24),
3747 le16_to_cpu(rx_desc->csum), skb);
3749 pskb_trim(skb, skb->len - 4);
3751 /* probably a little skewed due to removing CRC */
3752 total_rx_bytes += skb->len;
3755 /* eth type trans needs skb->data to point to something */
3756 if (!pskb_may_pull(skb, ETH_HLEN)) {
3757 e_err("pskb_may_pull failed.\n");
3762 skb->protocol = eth_type_trans(skb, netdev);
3764 e1000_receive_skb(adapter, status, rx_desc->special, skb);
3767 rx_desc->status = 0;
3769 /* return some buffers to hardware, one at a time is too slow */
3770 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3771 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3775 /* use prefetched values */
3777 buffer_info = next_buffer;
3779 rx_ring->next_to_clean = i;
3781 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3783 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3785 adapter->total_rx_packets += total_rx_packets;
3786 adapter->total_rx_bytes += total_rx_bytes;
3787 netdev->stats.rx_bytes += total_rx_bytes;
3788 netdev->stats.rx_packets += total_rx_packets;
3793 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3794 * @adapter: board private structure
3795 * @rx_ring: ring to clean
3796 * @work_done: amount of napi work completed this call
3797 * @work_to_do: max amount of work allowed for this call to do
3799 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3800 struct e1000_rx_ring *rx_ring,
3801 int *work_done, int work_to_do)
3803 struct e1000_hw *hw = &adapter->hw;
3804 struct net_device *netdev = adapter->netdev;
3805 struct pci_dev *pdev = adapter->pdev;
3806 struct e1000_rx_desc *rx_desc, *next_rxd;
3807 struct e1000_buffer *buffer_info, *next_buffer;
3808 unsigned long flags;
3811 int cleaned_count = 0;
3812 bool cleaned = false;
3813 unsigned int total_rx_bytes=0, total_rx_packets=0;
3815 i = rx_ring->next_to_clean;
3816 rx_desc = E1000_RX_DESC(*rx_ring, i);
3817 buffer_info = &rx_ring->buffer_info[i];
3819 while (rx_desc->status & E1000_RXD_STAT_DD) {
3820 struct sk_buff *skb;
3823 if (*work_done >= work_to_do)
3827 status = rx_desc->status;
3828 skb = buffer_info->skb;
3829 buffer_info->skb = NULL;
3831 prefetch(skb->data - NET_IP_ALIGN);
3833 if (++i == rx_ring->count) i = 0;
3834 next_rxd = E1000_RX_DESC(*rx_ring, i);
3837 next_buffer = &rx_ring->buffer_info[i];
3841 dma_unmap_single(&pdev->dev, buffer_info->dma,
3842 buffer_info->length, DMA_FROM_DEVICE);
3843 buffer_info->dma = 0;
3845 length = le16_to_cpu(rx_desc->length);
3846 /* !EOP means multiple descriptors were used to store a single
3847 * packet, if thats the case we need to toss it. In fact, we
3848 * to toss every packet with the EOP bit clear and the next
3849 * frame that _does_ have the EOP bit set, as it is by
3850 * definition only a frame fragment
3852 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
3853 adapter->discarding = true;
3855 if (adapter->discarding) {
3856 /* All receives must fit into a single buffer */
3857 e_info("Receive packet consumed multiple buffers\n");
3859 buffer_info->skb = skb;
3860 if (status & E1000_RXD_STAT_EOP)
3861 adapter->discarding = false;
3865 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3866 u8 last_byte = *(skb->data + length - 1);
3867 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
3869 spin_lock_irqsave(&adapter->stats_lock, flags);
3870 e1000_tbi_adjust_stats(hw, &adapter->stats,
3872 spin_unlock_irqrestore(&adapter->stats_lock,
3877 buffer_info->skb = skb;
3882 /* adjust length to remove Ethernet CRC, this must be
3883 * done after the TBI_ACCEPT workaround above */
3886 /* probably a little skewed due to removing CRC */
3887 total_rx_bytes += length;
3890 /* code added for copybreak, this should improve
3891 * performance for small packets with large amounts
3892 * of reassembly being done in the stack */
3893 if (length < copybreak) {
3894 struct sk_buff *new_skb =
3895 netdev_alloc_skb_ip_align(netdev, length);
3897 skb_copy_to_linear_data_offset(new_skb,
3903 /* save the skb in buffer_info as good */
3904 buffer_info->skb = skb;
3907 /* else just continue with the old one */
3909 /* end copybreak code */
3910 skb_put(skb, length);
3912 /* Receive Checksum Offload */
3913 e1000_rx_checksum(adapter,
3915 ((u32)(rx_desc->errors) << 24),
3916 le16_to_cpu(rx_desc->csum), skb);
3918 skb->protocol = eth_type_trans(skb, netdev);
3920 e1000_receive_skb(adapter, status, rx_desc->special, skb);
3923 rx_desc->status = 0;
3925 /* return some buffers to hardware, one at a time is too slow */
3926 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3927 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3931 /* use prefetched values */
3933 buffer_info = next_buffer;
3935 rx_ring->next_to_clean = i;
3937 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3939 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3941 adapter->total_rx_packets += total_rx_packets;
3942 adapter->total_rx_bytes += total_rx_bytes;
3943 netdev->stats.rx_bytes += total_rx_bytes;
3944 netdev->stats.rx_packets += total_rx_packets;
3949 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
3950 * @adapter: address of board private structure
3951 * @rx_ring: pointer to receive ring structure
3952 * @cleaned_count: number of buffers to allocate this pass
3956 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
3957 struct e1000_rx_ring *rx_ring, int cleaned_count)
3959 struct net_device *netdev = adapter->netdev;
3960 struct pci_dev *pdev = adapter->pdev;
3961 struct e1000_rx_desc *rx_desc;
3962 struct e1000_buffer *buffer_info;
3963 struct sk_buff *skb;
3965 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
3967 i = rx_ring->next_to_use;
3968 buffer_info = &rx_ring->buffer_info[i];
3970 while (cleaned_count--) {
3971 skb = buffer_info->skb;
3977 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
3978 if (unlikely(!skb)) {
3979 /* Better luck next round */
3980 adapter->alloc_rx_buff_failed++;
3984 /* Fix for errata 23, can't cross 64kB boundary */
3985 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3986 struct sk_buff *oldskb = skb;
3987 e_err("skb align check failed: %u bytes at %p\n",
3989 /* Try again, without freeing the previous */
3990 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
3991 /* Failed allocation, critical failure */
3993 dev_kfree_skb(oldskb);
3994 adapter->alloc_rx_buff_failed++;
3998 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4001 dev_kfree_skb(oldskb);
4002 break; /* while (cleaned_count--) */
4005 /* Use new allocation */
4006 dev_kfree_skb(oldskb);
4008 buffer_info->skb = skb;
4009 buffer_info->length = adapter->rx_buffer_len;
4011 /* allocate a new page if necessary */
4012 if (!buffer_info->page) {
4013 buffer_info->page = alloc_page(GFP_ATOMIC);
4014 if (unlikely(!buffer_info->page)) {
4015 adapter->alloc_rx_buff_failed++;
4020 if (!buffer_info->dma) {
4021 buffer_info->dma = dma_map_page(&pdev->dev,
4022 buffer_info->page, 0,
4023 buffer_info->length,
4025 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4026 put_page(buffer_info->page);
4028 buffer_info->page = NULL;
4029 buffer_info->skb = NULL;
4030 buffer_info->dma = 0;
4031 adapter->alloc_rx_buff_failed++;
4032 break; /* while !buffer_info->skb */
4036 rx_desc = E1000_RX_DESC(*rx_ring, i);
4037 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4039 if (unlikely(++i == rx_ring->count))
4041 buffer_info = &rx_ring->buffer_info[i];
4044 if (likely(rx_ring->next_to_use != i)) {
4045 rx_ring->next_to_use = i;
4046 if (unlikely(i-- == 0))
4047 i = (rx_ring->count - 1);
4049 /* Force memory writes to complete before letting h/w
4050 * know there are new descriptors to fetch. (Only
4051 * applicable for weak-ordered memory model archs,
4052 * such as IA-64). */
4054 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4059 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4060 * @adapter: address of board private structure
4063 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4064 struct e1000_rx_ring *rx_ring,
4067 struct e1000_hw *hw = &adapter->hw;
4068 struct net_device *netdev = adapter->netdev;
4069 struct pci_dev *pdev = adapter->pdev;
4070 struct e1000_rx_desc *rx_desc;
4071 struct e1000_buffer *buffer_info;
4072 struct sk_buff *skb;
4074 unsigned int bufsz = adapter->rx_buffer_len;
4076 i = rx_ring->next_to_use;
4077 buffer_info = &rx_ring->buffer_info[i];
4079 while (cleaned_count--) {
4080 skb = buffer_info->skb;
4086 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4087 if (unlikely(!skb)) {
4088 /* Better luck next round */
4089 adapter->alloc_rx_buff_failed++;
4093 /* Fix for errata 23, can't cross 64kB boundary */
4094 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4095 struct sk_buff *oldskb = skb;
4096 e_err("skb align check failed: %u bytes at %p\n",
4098 /* Try again, without freeing the previous */
4099 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4100 /* Failed allocation, critical failure */
4102 dev_kfree_skb(oldskb);
4103 adapter->alloc_rx_buff_failed++;
4107 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4110 dev_kfree_skb(oldskb);
4111 adapter->alloc_rx_buff_failed++;
4112 break; /* while !buffer_info->skb */
4115 /* Use new allocation */
4116 dev_kfree_skb(oldskb);
4118 buffer_info->skb = skb;
4119 buffer_info->length = adapter->rx_buffer_len;
4121 buffer_info->dma = dma_map_single(&pdev->dev,
4123 buffer_info->length,
4125 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4127 buffer_info->skb = NULL;
4128 buffer_info->dma = 0;
4129 adapter->alloc_rx_buff_failed++;
4130 break; /* while !buffer_info->skb */
4134 * XXX if it was allocated cleanly it will never map to a
4138 /* Fix for errata 23, can't cross 64kB boundary */
4139 if (!e1000_check_64k_bound(adapter,
4140 (void *)(unsigned long)buffer_info->dma,
4141 adapter->rx_buffer_len)) {
4142 e_err("dma align check failed: %u bytes at %p\n",
4143 adapter->rx_buffer_len,
4144 (void *)(unsigned long)buffer_info->dma);
4146 buffer_info->skb = NULL;
4148 dma_unmap_single(&pdev->dev, buffer_info->dma,
4149 adapter->rx_buffer_len,
4151 buffer_info->dma = 0;
4153 adapter->alloc_rx_buff_failed++;
4154 break; /* while !buffer_info->skb */
4156 rx_desc = E1000_RX_DESC(*rx_ring, i);
4157 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4159 if (unlikely(++i == rx_ring->count))
4161 buffer_info = &rx_ring->buffer_info[i];
4164 if (likely(rx_ring->next_to_use != i)) {
4165 rx_ring->next_to_use = i;
4166 if (unlikely(i-- == 0))
4167 i = (rx_ring->count - 1);
4169 /* Force memory writes to complete before letting h/w
4170 * know there are new descriptors to fetch. (Only
4171 * applicable for weak-ordered memory model archs,
4172 * such as IA-64). */
4174 writel(i, hw->hw_addr + rx_ring->rdt);
4179 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4183 static void e1000_smartspeed(struct e1000_adapter *adapter)
4185 struct e1000_hw *hw = &adapter->hw;
4189 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4190 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4193 if (adapter->smartspeed == 0) {
4194 /* If Master/Slave config fault is asserted twice,
4195 * we assume back-to-back */
4196 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4197 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4198 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4199 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4200 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4201 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4202 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4203 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4205 adapter->smartspeed++;
4206 if (!e1000_phy_setup_autoneg(hw) &&
4207 !e1000_read_phy_reg(hw, PHY_CTRL,
4209 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4210 MII_CR_RESTART_AUTO_NEG);
4211 e1000_write_phy_reg(hw, PHY_CTRL,
4216 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4217 /* If still no link, perhaps using 2/3 pair cable */
4218 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4219 phy_ctrl |= CR_1000T_MS_ENABLE;
4220 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4221 if (!e1000_phy_setup_autoneg(hw) &&
4222 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4223 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4224 MII_CR_RESTART_AUTO_NEG);
4225 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4228 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4229 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4230 adapter->smartspeed = 0;
4240 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4246 return e1000_mii_ioctl(netdev, ifr, cmd);
4259 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4262 struct e1000_adapter *adapter = netdev_priv(netdev);
4263 struct e1000_hw *hw = &adapter->hw;
4264 struct mii_ioctl_data *data = if_mii(ifr);
4268 unsigned long flags;
4270 if (hw->media_type != e1000_media_type_copper)
4275 data->phy_id = hw->phy_addr;
4278 spin_lock_irqsave(&adapter->stats_lock, flags);
4279 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4281 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4284 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4287 if (data->reg_num & ~(0x1F))
4289 mii_reg = data->val_in;
4290 spin_lock_irqsave(&adapter->stats_lock, flags);
4291 if (e1000_write_phy_reg(hw, data->reg_num,
4293 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4296 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4297 if (hw->media_type == e1000_media_type_copper) {
4298 switch (data->reg_num) {
4300 if (mii_reg & MII_CR_POWER_DOWN)
4302 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4304 hw->autoneg_advertised = 0x2F;
4307 spddplx = SPEED_1000;
4308 else if (mii_reg & 0x2000)
4309 spddplx = SPEED_100;
4312 spddplx += (mii_reg & 0x100)
4315 retval = e1000_set_spd_dplx(adapter,
4320 if (netif_running(adapter->netdev))
4321 e1000_reinit_locked(adapter);
4323 e1000_reset(adapter);
4325 case M88E1000_PHY_SPEC_CTRL:
4326 case M88E1000_EXT_PHY_SPEC_CTRL:
4327 if (e1000_phy_reset(hw))
4332 switch (data->reg_num) {
4334 if (mii_reg & MII_CR_POWER_DOWN)
4336 if (netif_running(adapter->netdev))
4337 e1000_reinit_locked(adapter);
4339 e1000_reset(adapter);
4347 return E1000_SUCCESS;
4350 void e1000_pci_set_mwi(struct e1000_hw *hw)
4352 struct e1000_adapter *adapter = hw->back;
4353 int ret_val = pci_set_mwi(adapter->pdev);
4356 e_err("Error in setting MWI\n");
4359 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4361 struct e1000_adapter *adapter = hw->back;
4363 pci_clear_mwi(adapter->pdev);
4366 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4368 struct e1000_adapter *adapter = hw->back;
4369 return pcix_get_mmrbc(adapter->pdev);
4372 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4374 struct e1000_adapter *adapter = hw->back;
4375 pcix_set_mmrbc(adapter->pdev, mmrbc);
4378 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4383 static void e1000_vlan_rx_register(struct net_device *netdev,
4384 struct vlan_group *grp)
4386 struct e1000_adapter *adapter = netdev_priv(netdev);
4387 struct e1000_hw *hw = &adapter->hw;
4390 if (!test_bit(__E1000_DOWN, &adapter->flags))
4391 e1000_irq_disable(adapter);
4392 adapter->vlgrp = grp;
4395 /* enable VLAN tag insert/strip */
4397 ctrl |= E1000_CTRL_VME;
4400 /* enable VLAN receive filtering */
4402 rctl &= ~E1000_RCTL_CFIEN;
4403 if (!(netdev->flags & IFF_PROMISC))
4404 rctl |= E1000_RCTL_VFE;
4406 e1000_update_mng_vlan(adapter);
4408 /* disable VLAN tag insert/strip */
4410 ctrl &= ~E1000_CTRL_VME;
4413 /* disable VLAN receive filtering */
4415 rctl &= ~E1000_RCTL_VFE;
4418 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
4419 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4420 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4424 if (!test_bit(__E1000_DOWN, &adapter->flags))
4425 e1000_irq_enable(adapter);
4428 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4430 struct e1000_adapter *adapter = netdev_priv(netdev);
4431 struct e1000_hw *hw = &adapter->hw;
4434 if ((hw->mng_cookie.status &
4435 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4436 (vid == adapter->mng_vlan_id))
4438 /* add VID to filter table */
4439 index = (vid >> 5) & 0x7F;
4440 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4441 vfta |= (1 << (vid & 0x1F));
4442 e1000_write_vfta(hw, index, vfta);
4445 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4447 struct e1000_adapter *adapter = netdev_priv(netdev);
4448 struct e1000_hw *hw = &adapter->hw;
4451 if (!test_bit(__E1000_DOWN, &adapter->flags))
4452 e1000_irq_disable(adapter);
4453 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4454 if (!test_bit(__E1000_DOWN, &adapter->flags))
4455 e1000_irq_enable(adapter);
4457 /* remove VID from filter table */
4458 index = (vid >> 5) & 0x7F;
4459 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4460 vfta &= ~(1 << (vid & 0x1F));
4461 e1000_write_vfta(hw, index, vfta);
4464 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4466 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4468 if (adapter->vlgrp) {
4470 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4471 if (!vlan_group_get_device(adapter->vlgrp, vid))
4473 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4478 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
4480 struct e1000_hw *hw = &adapter->hw;
4484 /* Fiber NICs only allow 1000 gbps Full duplex */
4485 if ((hw->media_type == e1000_media_type_fiber) &&
4486 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4487 e_err("Unsupported Speed/Duplex configuration\n");
4492 case SPEED_10 + DUPLEX_HALF:
4493 hw->forced_speed_duplex = e1000_10_half;
4495 case SPEED_10 + DUPLEX_FULL:
4496 hw->forced_speed_duplex = e1000_10_full;
4498 case SPEED_100 + DUPLEX_HALF:
4499 hw->forced_speed_duplex = e1000_100_half;
4501 case SPEED_100 + DUPLEX_FULL:
4502 hw->forced_speed_duplex = e1000_100_full;
4504 case SPEED_1000 + DUPLEX_FULL:
4506 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4508 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4510 e_err("Unsupported Speed/Duplex configuration\n");
4516 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4518 struct net_device *netdev = pci_get_drvdata(pdev);
4519 struct e1000_adapter *adapter = netdev_priv(netdev);
4520 struct e1000_hw *hw = &adapter->hw;
4521 u32 ctrl, ctrl_ext, rctl, status;
4522 u32 wufc = adapter->wol;
4527 netif_device_detach(netdev);
4529 if (netif_running(netdev)) {
4530 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4531 e1000_down(adapter);
4535 retval = pci_save_state(pdev);
4540 status = er32(STATUS);
4541 if (status & E1000_STATUS_LU)
4542 wufc &= ~E1000_WUFC_LNKC;
4545 e1000_setup_rctl(adapter);
4546 e1000_set_rx_mode(netdev);
4548 /* turn on all-multi mode if wake on multicast is enabled */
4549 if (wufc & E1000_WUFC_MC) {
4551 rctl |= E1000_RCTL_MPE;
4555 if (hw->mac_type >= e1000_82540) {
4557 /* advertise wake from D3Cold */
4558 #define E1000_CTRL_ADVD3WUC 0x00100000
4559 /* phy power management enable */
4560 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4561 ctrl |= E1000_CTRL_ADVD3WUC |
4562 E1000_CTRL_EN_PHY_PWR_MGMT;
4566 if (hw->media_type == e1000_media_type_fiber ||
4567 hw->media_type == e1000_media_type_internal_serdes) {
4568 /* keep the laser running in D3 */
4569 ctrl_ext = er32(CTRL_EXT);
4570 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4571 ew32(CTRL_EXT, ctrl_ext);
4574 ew32(WUC, E1000_WUC_PME_EN);
4581 e1000_release_manageability(adapter);
4583 *enable_wake = !!wufc;
4585 /* make sure adapter isn't asleep if manageability is enabled */
4586 if (adapter->en_mng_pt)
4587 *enable_wake = true;
4589 if (netif_running(netdev))
4590 e1000_free_irq(adapter);
4592 pci_disable_device(pdev);
4598 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4603 retval = __e1000_shutdown(pdev, &wake);
4608 pci_prepare_to_sleep(pdev);
4610 pci_wake_from_d3(pdev, false);
4611 pci_set_power_state(pdev, PCI_D3hot);
4617 static int e1000_resume(struct pci_dev *pdev)
4619 struct net_device *netdev = pci_get_drvdata(pdev);
4620 struct e1000_adapter *adapter = netdev_priv(netdev);
4621 struct e1000_hw *hw = &adapter->hw;
4624 pci_set_power_state(pdev, PCI_D0);
4625 pci_restore_state(pdev);
4626 pci_save_state(pdev);
4628 if (adapter->need_ioport)
4629 err = pci_enable_device(pdev);
4631 err = pci_enable_device_mem(pdev);
4633 pr_err("Cannot enable PCI device from suspend\n");
4636 pci_set_master(pdev);
4638 pci_enable_wake(pdev, PCI_D3hot, 0);
4639 pci_enable_wake(pdev, PCI_D3cold, 0);
4641 if (netif_running(netdev)) {
4642 err = e1000_request_irq(adapter);
4647 e1000_power_up_phy(adapter);
4648 e1000_reset(adapter);
4651 e1000_init_manageability(adapter);
4653 if (netif_running(netdev))
4656 netif_device_attach(netdev);
4662 static void e1000_shutdown(struct pci_dev *pdev)
4666 __e1000_shutdown(pdev, &wake);
4668 if (system_state == SYSTEM_POWER_OFF) {
4669 pci_wake_from_d3(pdev, wake);
4670 pci_set_power_state(pdev, PCI_D3hot);
4674 #ifdef CONFIG_NET_POLL_CONTROLLER
4676 * Polling 'interrupt' - used by things like netconsole to send skbs
4677 * without having to re-enable interrupts. It's not called while
4678 * the interrupt routine is executing.
4680 static void e1000_netpoll(struct net_device *netdev)
4682 struct e1000_adapter *adapter = netdev_priv(netdev);
4684 disable_irq(adapter->pdev->irq);
4685 e1000_intr(adapter->pdev->irq, netdev);
4686 enable_irq(adapter->pdev->irq);
4691 * e1000_io_error_detected - called when PCI error is detected
4692 * @pdev: Pointer to PCI device
4693 * @state: The current pci connection state
4695 * This function is called after a PCI bus error affecting
4696 * this device has been detected.
4698 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4699 pci_channel_state_t state)
4701 struct net_device *netdev = pci_get_drvdata(pdev);
4702 struct e1000_adapter *adapter = netdev_priv(netdev);
4704 netif_device_detach(netdev);
4706 if (state == pci_channel_io_perm_failure)
4707 return PCI_ERS_RESULT_DISCONNECT;
4709 if (netif_running(netdev))
4710 e1000_down(adapter);
4711 pci_disable_device(pdev);
4713 /* Request a slot slot reset. */
4714 return PCI_ERS_RESULT_NEED_RESET;
4718 * e1000_io_slot_reset - called after the pci bus has been reset.
4719 * @pdev: Pointer to PCI device
4721 * Restart the card from scratch, as if from a cold-boot. Implementation
4722 * resembles the first-half of the e1000_resume routine.
4724 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4726 struct net_device *netdev = pci_get_drvdata(pdev);
4727 struct e1000_adapter *adapter = netdev_priv(netdev);
4728 struct e1000_hw *hw = &adapter->hw;
4731 if (adapter->need_ioport)
4732 err = pci_enable_device(pdev);
4734 err = pci_enable_device_mem(pdev);
4736 pr_err("Cannot re-enable PCI device after reset.\n");
4737 return PCI_ERS_RESULT_DISCONNECT;
4739 pci_set_master(pdev);
4741 pci_enable_wake(pdev, PCI_D3hot, 0);
4742 pci_enable_wake(pdev, PCI_D3cold, 0);
4744 e1000_reset(adapter);
4747 return PCI_ERS_RESULT_RECOVERED;
4751 * e1000_io_resume - called when traffic can start flowing again.
4752 * @pdev: Pointer to PCI device
4754 * This callback is called when the error recovery driver tells us that
4755 * its OK to resume normal operation. Implementation resembles the
4756 * second-half of the e1000_resume routine.
4758 static void e1000_io_resume(struct pci_dev *pdev)
4760 struct net_device *netdev = pci_get_drvdata(pdev);
4761 struct e1000_adapter *adapter = netdev_priv(netdev);
4763 e1000_init_manageability(adapter);
4765 if (netif_running(netdev)) {
4766 if (e1000_up(adapter)) {
4767 pr_info("can't bring device back up after reset\n");
4772 netif_device_attach(netdev);