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 "7.3.20-k3-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 struct pci_device_id 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 int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
129 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
130 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
131 static int e1000_set_mac(struct net_device *netdev, void *p);
132 static irqreturn_t e1000_intr(int irq, void *data);
133 static irqreturn_t e1000_intr_msi(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 void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
141 struct e1000_rx_ring *rx_ring,
143 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
144 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
146 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
147 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
148 static void e1000_tx_timeout(struct net_device *dev);
149 static void e1000_reset_task(struct work_struct *work);
150 static void e1000_smartspeed(struct e1000_adapter *adapter);
151 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
152 struct sk_buff *skb);
154 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
155 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
156 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
157 static void e1000_restore_vlan(struct e1000_adapter *adapter);
159 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
161 static int e1000_resume(struct pci_dev *pdev);
163 static void e1000_shutdown(struct pci_dev *pdev);
165 #ifdef CONFIG_NET_POLL_CONTROLLER
166 /* for netdump / net console */
167 static void e1000_netpoll (struct net_device *netdev);
170 #define COPYBREAK_DEFAULT 256
171 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
172 module_param(copybreak, uint, 0644);
173 MODULE_PARM_DESC(copybreak,
174 "Maximum size of packet that is copied to a new buffer on receive");
176 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
177 pci_channel_state_t state);
178 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
179 static void e1000_io_resume(struct pci_dev *pdev);
181 static struct pci_error_handlers e1000_err_handler = {
182 .error_detected = e1000_io_error_detected,
183 .slot_reset = e1000_io_slot_reset,
184 .resume = e1000_io_resume,
187 static struct pci_driver e1000_driver = {
188 .name = e1000_driver_name,
189 .id_table = e1000_pci_tbl,
190 .probe = e1000_probe,
191 .remove = __devexit_p(e1000_remove),
193 /* Power Managment Hooks */
194 .suspend = e1000_suspend,
195 .resume = e1000_resume,
197 .shutdown = e1000_shutdown,
198 .err_handler = &e1000_err_handler
201 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
202 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
203 MODULE_LICENSE("GPL");
204 MODULE_VERSION(DRV_VERSION);
206 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
207 module_param(debug, int, 0);
208 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
211 * e1000_init_module - Driver Registration Routine
213 * e1000_init_module is the first routine called when the driver is
214 * loaded. All it does is register with the PCI subsystem.
217 static int __init e1000_init_module(void)
220 printk(KERN_INFO "%s - version %s\n",
221 e1000_driver_string, e1000_driver_version);
223 printk(KERN_INFO "%s\n", e1000_copyright);
225 ret = pci_register_driver(&e1000_driver);
226 if (copybreak != COPYBREAK_DEFAULT) {
228 printk(KERN_INFO "e1000: copybreak disabled\n");
230 printk(KERN_INFO "e1000: copybreak enabled for "
231 "packets <= %u bytes\n", copybreak);
236 module_init(e1000_init_module);
239 * e1000_exit_module - Driver Exit Cleanup Routine
241 * e1000_exit_module is called just before the driver is removed
245 static void __exit e1000_exit_module(void)
247 pci_unregister_driver(&e1000_driver);
250 module_exit(e1000_exit_module);
252 static int e1000_request_irq(struct e1000_adapter *adapter)
254 struct e1000_hw *hw = &adapter->hw;
255 struct net_device *netdev = adapter->netdev;
256 irq_handler_t handler = e1000_intr;
257 int irq_flags = IRQF_SHARED;
260 if (hw->mac_type >= e1000_82571) {
261 adapter->have_msi = !pci_enable_msi(adapter->pdev);
262 if (adapter->have_msi) {
263 handler = e1000_intr_msi;
268 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
271 if (adapter->have_msi)
272 pci_disable_msi(adapter->pdev);
274 "Unable to allocate interrupt Error: %d\n", err);
280 static void e1000_free_irq(struct e1000_adapter *adapter)
282 struct net_device *netdev = adapter->netdev;
284 free_irq(adapter->pdev->irq, netdev);
286 if (adapter->have_msi)
287 pci_disable_msi(adapter->pdev);
291 * e1000_irq_disable - Mask off interrupt generation on the NIC
292 * @adapter: board private structure
295 static void e1000_irq_disable(struct e1000_adapter *adapter)
297 struct e1000_hw *hw = &adapter->hw;
301 synchronize_irq(adapter->pdev->irq);
305 * e1000_irq_enable - Enable default interrupt generation settings
306 * @adapter: board private structure
309 static void e1000_irq_enable(struct e1000_adapter *adapter)
311 struct e1000_hw *hw = &adapter->hw;
313 ew32(IMS, IMS_ENABLE_MASK);
317 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
319 struct e1000_hw *hw = &adapter->hw;
320 struct net_device *netdev = adapter->netdev;
321 u16 vid = hw->mng_cookie.vlan_id;
322 u16 old_vid = adapter->mng_vlan_id;
323 if (adapter->vlgrp) {
324 if (!vlan_group_get_device(adapter->vlgrp, vid)) {
325 if (hw->mng_cookie.status &
326 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
327 e1000_vlan_rx_add_vid(netdev, vid);
328 adapter->mng_vlan_id = vid;
330 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
332 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
334 !vlan_group_get_device(adapter->vlgrp, old_vid))
335 e1000_vlan_rx_kill_vid(netdev, old_vid);
337 adapter->mng_vlan_id = vid;
342 * e1000_release_hw_control - release control of the h/w to f/w
343 * @adapter: address of board private structure
345 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
346 * For ASF and Pass Through versions of f/w this means that the
347 * driver is no longer loaded. For AMT version (only with 82573) i
348 * of the f/w this means that the network i/f is closed.
352 static void e1000_release_hw_control(struct e1000_adapter *adapter)
356 struct e1000_hw *hw = &adapter->hw;
358 /* Let firmware taken over control of h/w */
359 switch (hw->mac_type) {
362 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
366 case e1000_80003es2lan:
368 ctrl_ext = er32(CTRL_EXT);
369 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
377 * e1000_get_hw_control - get control of the h/w from f/w
378 * @adapter: address of board private structure
380 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
381 * For ASF and Pass Through versions of f/w this means that
382 * the driver is loaded. For AMT version (only with 82573)
383 * of the f/w this means that the network i/f is open.
387 static void e1000_get_hw_control(struct e1000_adapter *adapter)
391 struct e1000_hw *hw = &adapter->hw;
393 /* Let firmware know the driver has taken over */
394 switch (hw->mac_type) {
397 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
401 case e1000_80003es2lan:
403 ctrl_ext = er32(CTRL_EXT);
404 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
411 static void e1000_init_manageability(struct e1000_adapter *adapter)
413 struct e1000_hw *hw = &adapter->hw;
415 if (adapter->en_mng_pt) {
416 u32 manc = er32(MANC);
418 /* disable hardware interception of ARP */
419 manc &= ~(E1000_MANC_ARP_EN);
421 /* enable receiving management packets to the host */
422 /* this will probably generate destination unreachable messages
423 * from the host OS, but the packets will be handled on SMBUS */
424 if (hw->has_manc2h) {
425 u32 manc2h = er32(MANC2H);
427 manc |= E1000_MANC_EN_MNG2HOST;
428 #define E1000_MNG2HOST_PORT_623 (1 << 5)
429 #define E1000_MNG2HOST_PORT_664 (1 << 6)
430 manc2h |= E1000_MNG2HOST_PORT_623;
431 manc2h |= E1000_MNG2HOST_PORT_664;
432 ew32(MANC2H, manc2h);
439 static void e1000_release_manageability(struct e1000_adapter *adapter)
441 struct e1000_hw *hw = &adapter->hw;
443 if (adapter->en_mng_pt) {
444 u32 manc = er32(MANC);
446 /* re-enable hardware interception of ARP */
447 manc |= E1000_MANC_ARP_EN;
450 manc &= ~E1000_MANC_EN_MNG2HOST;
452 /* don't explicitly have to mess with MANC2H since
453 * MANC has an enable disable that gates MANC2H */
460 * e1000_configure - configure the hardware for RX and TX
461 * @adapter = private board structure
463 static void e1000_configure(struct e1000_adapter *adapter)
465 struct net_device *netdev = adapter->netdev;
468 e1000_set_rx_mode(netdev);
470 e1000_restore_vlan(adapter);
471 e1000_init_manageability(adapter);
473 e1000_configure_tx(adapter);
474 e1000_setup_rctl(adapter);
475 e1000_configure_rx(adapter);
476 /* call E1000_DESC_UNUSED which always leaves
477 * at least 1 descriptor unused to make sure
478 * next_to_use != next_to_clean */
479 for (i = 0; i < adapter->num_rx_queues; i++) {
480 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
481 adapter->alloc_rx_buf(adapter, ring,
482 E1000_DESC_UNUSED(ring));
485 adapter->tx_queue_len = netdev->tx_queue_len;
488 int e1000_up(struct e1000_adapter *adapter)
490 struct e1000_hw *hw = &adapter->hw;
492 /* hardware has been reset, we need to reload some things */
493 e1000_configure(adapter);
495 clear_bit(__E1000_DOWN, &adapter->flags);
497 napi_enable(&adapter->napi);
499 e1000_irq_enable(adapter);
501 /* fire a link change interrupt to start the watchdog */
502 ew32(ICS, E1000_ICS_LSC);
507 * e1000_power_up_phy - restore link in case the phy was powered down
508 * @adapter: address of board private structure
510 * The phy may be powered down to save power and turn off link when the
511 * driver is unloaded and wake on lan is not enabled (among others)
512 * *** this routine MUST be followed by a call to e1000_reset ***
516 void e1000_power_up_phy(struct e1000_adapter *adapter)
518 struct e1000_hw *hw = &adapter->hw;
521 /* Just clear the power down bit to wake the phy back up */
522 if (hw->media_type == e1000_media_type_copper) {
523 /* according to the manual, the phy will retain its
524 * settings across a power-down/up cycle */
525 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
526 mii_reg &= ~MII_CR_POWER_DOWN;
527 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
531 static void e1000_power_down_phy(struct e1000_adapter *adapter)
533 struct e1000_hw *hw = &adapter->hw;
535 /* Power down the PHY so no link is implied when interface is down *
536 * The PHY cannot be powered down if any of the following is true *
539 * (c) SoL/IDER session is active */
540 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
541 hw->media_type == e1000_media_type_copper) {
544 switch (hw->mac_type) {
547 case e1000_82545_rev_3:
549 case e1000_82546_rev_3:
551 case e1000_82541_rev_2:
553 case e1000_82547_rev_2:
554 if (er32(MANC) & E1000_MANC_SMBUS_EN)
560 case e1000_80003es2lan:
562 if (e1000_check_mng_mode(hw) ||
563 e1000_check_phy_reset_block(hw))
569 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
570 mii_reg |= MII_CR_POWER_DOWN;
571 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
578 void e1000_down(struct e1000_adapter *adapter)
580 struct net_device *netdev = adapter->netdev;
582 /* signal that we're down so the interrupt handler does not
583 * reschedule our watchdog timer */
584 set_bit(__E1000_DOWN, &adapter->flags);
586 napi_disable(&adapter->napi);
588 e1000_irq_disable(adapter);
590 del_timer_sync(&adapter->tx_fifo_stall_timer);
591 del_timer_sync(&adapter->watchdog_timer);
592 del_timer_sync(&adapter->phy_info_timer);
594 netdev->tx_queue_len = adapter->tx_queue_len;
595 adapter->link_speed = 0;
596 adapter->link_duplex = 0;
597 netif_carrier_off(netdev);
598 netif_stop_queue(netdev);
600 e1000_reset(adapter);
601 e1000_clean_all_tx_rings(adapter);
602 e1000_clean_all_rx_rings(adapter);
605 void e1000_reinit_locked(struct e1000_adapter *adapter)
607 WARN_ON(in_interrupt());
608 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
612 clear_bit(__E1000_RESETTING, &adapter->flags);
615 void e1000_reset(struct e1000_adapter *adapter)
617 struct e1000_hw *hw = &adapter->hw;
618 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
619 u16 fc_high_water_mark = E1000_FC_HIGH_DIFF;
620 bool legacy_pba_adjust = false;
622 /* Repartition Pba for greater than 9k mtu
623 * To take effect CTRL.RST is required.
626 switch (hw->mac_type) {
627 case e1000_82542_rev2_0:
628 case e1000_82542_rev2_1:
633 case e1000_82541_rev_2:
634 legacy_pba_adjust = true;
638 case e1000_82545_rev_3:
640 case e1000_82546_rev_3:
644 case e1000_82547_rev_2:
645 legacy_pba_adjust = true;
650 case e1000_80003es2lan:
658 case e1000_undefined:
663 if (legacy_pba_adjust) {
664 if (adapter->netdev->mtu > E1000_RXBUFFER_8192)
665 pba -= 8; /* allocate more FIFO for Tx */
667 if (hw->mac_type == e1000_82547) {
668 adapter->tx_fifo_head = 0;
669 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
670 adapter->tx_fifo_size =
671 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
672 atomic_set(&adapter->tx_fifo_stall, 0);
674 } else if (hw->max_frame_size > MAXIMUM_ETHERNET_FRAME_SIZE) {
675 /* adjust PBA for jumbo frames */
678 /* To maintain wire speed transmits, the Tx FIFO should be
679 * large enough to accomodate two full transmit packets,
680 * rounded up to the next 1KB and expressed in KB. Likewise,
681 * the Rx FIFO should be large enough to accomodate at least
682 * one full receive packet and is similarly rounded up and
683 * expressed in KB. */
685 /* upper 16 bits has Tx packet buffer allocation size in KB */
686 tx_space = pba >> 16;
687 /* lower 16 bits has Rx packet buffer allocation size in KB */
689 /* don't include ethernet FCS because hardware appends/strips */
690 min_rx_space = adapter->netdev->mtu + ENET_HEADER_SIZE +
692 min_tx_space = min_rx_space;
694 min_tx_space = ALIGN(min_tx_space, 1024);
696 min_rx_space = ALIGN(min_rx_space, 1024);
699 /* If current Tx allocation is less than the min Tx FIFO size,
700 * and the min Tx FIFO size is less than the current Rx FIFO
701 * allocation, take space away from current Rx allocation */
702 if (tx_space < min_tx_space &&
703 ((min_tx_space - tx_space) < pba)) {
704 pba = pba - (min_tx_space - tx_space);
706 /* PCI/PCIx hardware has PBA alignment constraints */
707 switch (hw->mac_type) {
708 case e1000_82545 ... e1000_82546_rev_3:
709 pba &= ~(E1000_PBA_8K - 1);
715 /* if short on rx space, rx wins and must trump tx
716 * adjustment or use Early Receive if available */
717 if (pba < min_rx_space) {
718 switch (hw->mac_type) {
720 /* ERT enabled in e1000_configure_rx */
732 /* flow control settings */
733 /* Set the FC high water mark to 90% of the FIFO size.
734 * Required to clear last 3 LSB */
735 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
736 /* We can't use 90% on small FIFOs because the remainder
737 * would be less than 1 full frame. In this case, we size
738 * it to allow at least a full frame above the high water
740 if (pba < E1000_PBA_16K)
741 fc_high_water_mark = (pba * 1024) - 1600;
743 hw->fc_high_water = fc_high_water_mark;
744 hw->fc_low_water = fc_high_water_mark - 8;
745 if (hw->mac_type == e1000_80003es2lan)
746 hw->fc_pause_time = 0xFFFF;
748 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
750 hw->fc = hw->original_fc;
752 /* Allow time for pending master requests to run */
754 if (hw->mac_type >= e1000_82544)
757 if (e1000_init_hw(hw))
758 DPRINTK(PROBE, ERR, "Hardware Error\n");
759 e1000_update_mng_vlan(adapter);
761 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
762 if (hw->mac_type >= e1000_82544 &&
763 hw->mac_type <= e1000_82547_rev_2 &&
765 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
766 u32 ctrl = er32(CTRL);
767 /* clear phy power management bit if we are in gig only mode,
768 * which if enabled will attempt negotiation to 100Mb, which
769 * can cause a loss of link at power off or driver unload */
770 ctrl &= ~E1000_CTRL_SWDPIN3;
774 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
775 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
777 e1000_reset_adaptive(hw);
778 e1000_phy_get_info(hw, &adapter->phy_info);
780 if (!adapter->smart_power_down &&
781 (hw->mac_type == e1000_82571 ||
782 hw->mac_type == e1000_82572)) {
784 /* speed up time to link by disabling smart power down, ignore
785 * the return value of this function because there is nothing
786 * different we would do if it failed */
787 e1000_read_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
789 phy_data &= ~IGP02E1000_PM_SPD;
790 e1000_write_phy_reg(hw, IGP02E1000_PHY_POWER_MGMT,
794 e1000_release_manageability(adapter);
798 * Dump the eeprom for users having checksum issues
800 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
802 struct net_device *netdev = adapter->netdev;
803 struct ethtool_eeprom eeprom;
804 const struct ethtool_ops *ops = netdev->ethtool_ops;
807 u16 csum_old, csum_new = 0;
809 eeprom.len = ops->get_eeprom_len(netdev);
812 data = kmalloc(eeprom.len, GFP_KERNEL);
814 printk(KERN_ERR "Unable to allocate memory to dump EEPROM"
819 ops->get_eeprom(netdev, &eeprom, data);
821 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
822 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
823 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
824 csum_new += data[i] + (data[i + 1] << 8);
825 csum_new = EEPROM_SUM - csum_new;
827 printk(KERN_ERR "/*********************/\n");
828 printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old);
829 printk(KERN_ERR "Calculated : 0x%04x\n", csum_new);
831 printk(KERN_ERR "Offset Values\n");
832 printk(KERN_ERR "======== ======\n");
833 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
835 printk(KERN_ERR "Include this output when contacting your support "
837 printk(KERN_ERR "This is not a software error! Something bad "
838 "happened to your hardware or\n");
839 printk(KERN_ERR "EEPROM image. Ignoring this "
840 "problem could result in further problems,\n");
841 printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n");
842 printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, "
843 "which is invalid\n");
844 printk(KERN_ERR "and requires you to set the proper MAC "
845 "address manually before continuing\n");
846 printk(KERN_ERR "to enable this network device.\n");
847 printk(KERN_ERR "Please inspect the EEPROM dump and report the issue "
848 "to your hardware vendor\n");
849 printk(KERN_ERR "or Intel Customer Support.\n");
850 printk(KERN_ERR "/*********************/\n");
856 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
857 * @pdev: PCI device information struct
859 * Return true if an adapter needs ioport resources
861 static int e1000_is_need_ioport(struct pci_dev *pdev)
863 switch (pdev->device) {
864 case E1000_DEV_ID_82540EM:
865 case E1000_DEV_ID_82540EM_LOM:
866 case E1000_DEV_ID_82540EP:
867 case E1000_DEV_ID_82540EP_LOM:
868 case E1000_DEV_ID_82540EP_LP:
869 case E1000_DEV_ID_82541EI:
870 case E1000_DEV_ID_82541EI_MOBILE:
871 case E1000_DEV_ID_82541ER:
872 case E1000_DEV_ID_82541ER_LOM:
873 case E1000_DEV_ID_82541GI:
874 case E1000_DEV_ID_82541GI_LF:
875 case E1000_DEV_ID_82541GI_MOBILE:
876 case E1000_DEV_ID_82544EI_COPPER:
877 case E1000_DEV_ID_82544EI_FIBER:
878 case E1000_DEV_ID_82544GC_COPPER:
879 case E1000_DEV_ID_82544GC_LOM:
880 case E1000_DEV_ID_82545EM_COPPER:
881 case E1000_DEV_ID_82545EM_FIBER:
882 case E1000_DEV_ID_82546EB_COPPER:
883 case E1000_DEV_ID_82546EB_FIBER:
884 case E1000_DEV_ID_82546EB_QUAD_COPPER:
891 static const struct net_device_ops e1000_netdev_ops = {
892 .ndo_open = e1000_open,
893 .ndo_stop = e1000_close,
894 .ndo_start_xmit = e1000_xmit_frame,
895 .ndo_get_stats = e1000_get_stats,
896 .ndo_set_rx_mode = e1000_set_rx_mode,
897 .ndo_set_mac_address = e1000_set_mac,
898 .ndo_tx_timeout = e1000_tx_timeout,
899 .ndo_change_mtu = e1000_change_mtu,
900 .ndo_do_ioctl = e1000_ioctl,
901 .ndo_validate_addr = eth_validate_addr,
903 .ndo_vlan_rx_register = e1000_vlan_rx_register,
904 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
905 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
906 #ifdef CONFIG_NET_POLL_CONTROLLER
907 .ndo_poll_controller = e1000_netpoll,
912 * e1000_probe - Device Initialization Routine
913 * @pdev: PCI device information struct
914 * @ent: entry in e1000_pci_tbl
916 * Returns 0 on success, negative on failure
918 * e1000_probe initializes an adapter identified by a pci_dev structure.
919 * The OS initialization, configuring of the adapter private structure,
920 * and a hardware reset occur.
922 static int __devinit e1000_probe(struct pci_dev *pdev,
923 const struct pci_device_id *ent)
925 struct net_device *netdev;
926 struct e1000_adapter *adapter;
929 static int cards_found = 0;
930 static int global_quad_port_a = 0; /* global ksp3 port a indication */
931 int i, err, pci_using_dac;
933 u16 eeprom_apme_mask = E1000_EEPROM_APME;
934 int bars, need_ioport;
936 /* do not allocate ioport bars when not needed */
937 need_ioport = e1000_is_need_ioport(pdev);
939 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
940 err = pci_enable_device(pdev);
942 bars = pci_select_bars(pdev, IORESOURCE_MEM);
943 err = pci_enable_device(pdev);
948 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
949 !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
952 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
954 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
956 E1000_ERR("No usable DMA configuration, "
964 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
968 pci_set_master(pdev);
971 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
973 goto err_alloc_etherdev;
975 SET_NETDEV_DEV(netdev, &pdev->dev);
977 pci_set_drvdata(pdev, netdev);
978 adapter = netdev_priv(netdev);
979 adapter->netdev = netdev;
980 adapter->pdev = pdev;
981 adapter->msg_enable = (1 << debug) - 1;
982 adapter->bars = bars;
983 adapter->need_ioport = need_ioport;
989 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
993 if (adapter->need_ioport) {
994 for (i = BAR_1; i <= BAR_5; i++) {
995 if (pci_resource_len(pdev, i) == 0)
997 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
998 hw->io_base = pci_resource_start(pdev, i);
1004 netdev->netdev_ops = &e1000_netdev_ops;
1005 e1000_set_ethtool_ops(netdev);
1006 netdev->watchdog_timeo = 5 * HZ;
1007 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1009 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1011 adapter->bd_number = cards_found;
1013 /* setup the private structure */
1015 err = e1000_sw_init(adapter);
1020 /* Flash BAR mapping must happen after e1000_sw_init
1021 * because it depends on mac_type */
1022 if ((hw->mac_type == e1000_ich8lan) &&
1023 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
1024 hw->flash_address = pci_ioremap_bar(pdev, 1);
1025 if (!hw->flash_address)
1029 if (e1000_check_phy_reset_block(hw))
1030 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
1032 if (hw->mac_type >= e1000_82543) {
1033 netdev->features = NETIF_F_SG |
1035 NETIF_F_HW_VLAN_TX |
1036 NETIF_F_HW_VLAN_RX |
1037 NETIF_F_HW_VLAN_FILTER;
1038 if (hw->mac_type == e1000_ich8lan)
1039 netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
1042 if ((hw->mac_type >= e1000_82544) &&
1043 (hw->mac_type != e1000_82547))
1044 netdev->features |= NETIF_F_TSO;
1046 if (hw->mac_type > e1000_82547_rev_2)
1047 netdev->features |= NETIF_F_TSO6;
1049 netdev->features |= NETIF_F_HIGHDMA;
1051 netdev->features |= NETIF_F_LLTX;
1053 netdev->vlan_features |= NETIF_F_TSO;
1054 netdev->vlan_features |= NETIF_F_TSO6;
1055 netdev->vlan_features |= NETIF_F_HW_CSUM;
1056 netdev->vlan_features |= NETIF_F_SG;
1058 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1060 /* initialize eeprom parameters */
1061 if (e1000_init_eeprom_params(hw)) {
1062 E1000_ERR("EEPROM initialization failed\n");
1066 /* before reading the EEPROM, reset the controller to
1067 * put the device in a known good starting state */
1071 /* make sure the EEPROM is good */
1072 if (e1000_validate_eeprom_checksum(hw) < 0) {
1073 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
1074 e1000_dump_eeprom(adapter);
1076 * set MAC address to all zeroes to invalidate and temporary
1077 * disable this device for the user. This blocks regular
1078 * traffic while still permitting ethtool ioctls from reaching
1079 * the hardware as well as allowing the user to run the
1080 * interface after manually setting a hw addr using
1083 memset(hw->mac_addr, 0, netdev->addr_len);
1085 /* copy the MAC address out of the EEPROM */
1086 if (e1000_read_mac_addr(hw))
1087 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
1089 /* don't block initalization here due to bad MAC address */
1090 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1091 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1093 if (!is_valid_ether_addr(netdev->perm_addr))
1094 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
1096 e1000_get_bus_info(hw);
1098 init_timer(&adapter->tx_fifo_stall_timer);
1099 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
1100 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1102 init_timer(&adapter->watchdog_timer);
1103 adapter->watchdog_timer.function = &e1000_watchdog;
1104 adapter->watchdog_timer.data = (unsigned long) adapter;
1106 init_timer(&adapter->phy_info_timer);
1107 adapter->phy_info_timer.function = &e1000_update_phy_info;
1108 adapter->phy_info_timer.data = (unsigned long)adapter;
1110 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1112 e1000_check_options(adapter);
1114 /* Initial Wake on LAN setting
1115 * If APM wake is enabled in the EEPROM,
1116 * enable the ACPI Magic Packet filter
1119 switch (hw->mac_type) {
1120 case e1000_82542_rev2_0:
1121 case e1000_82542_rev2_1:
1125 e1000_read_eeprom(hw,
1126 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1127 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1130 e1000_read_eeprom(hw,
1131 EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
1132 eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
1135 case e1000_82546_rev_3:
1137 case e1000_80003es2lan:
1138 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1139 e1000_read_eeprom(hw,
1140 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1145 e1000_read_eeprom(hw,
1146 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1149 if (eeprom_data & eeprom_apme_mask)
1150 adapter->eeprom_wol |= E1000_WUFC_MAG;
1152 /* now that we have the eeprom settings, apply the special cases
1153 * where the eeprom may be wrong or the board simply won't support
1154 * wake on lan on a particular port */
1155 switch (pdev->device) {
1156 case E1000_DEV_ID_82546GB_PCIE:
1157 adapter->eeprom_wol = 0;
1159 case E1000_DEV_ID_82546EB_FIBER:
1160 case E1000_DEV_ID_82546GB_FIBER:
1161 case E1000_DEV_ID_82571EB_FIBER:
1162 /* Wake events only supported on port A for dual fiber
1163 * regardless of eeprom setting */
1164 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1165 adapter->eeprom_wol = 0;
1167 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1168 case E1000_DEV_ID_82571EB_QUAD_COPPER:
1169 case E1000_DEV_ID_82571EB_QUAD_FIBER:
1170 case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
1171 case E1000_DEV_ID_82571PT_QUAD_COPPER:
1172 /* if quad port adapter, disable WoL on all but port A */
1173 if (global_quad_port_a != 0)
1174 adapter->eeprom_wol = 0;
1176 adapter->quad_port_a = 1;
1177 /* Reset for multiple quad port adapters */
1178 if (++global_quad_port_a == 4)
1179 global_quad_port_a = 0;
1183 /* initialize the wol settings based on the eeprom settings */
1184 adapter->wol = adapter->eeprom_wol;
1185 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1187 /* print bus type/speed/width info */
1188 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
1189 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
1190 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
1191 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
1192 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
1193 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
1194 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
1195 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
1196 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
1197 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
1198 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
1201 printk("%pM\n", netdev->dev_addr);
1203 if (hw->bus_type == e1000_bus_type_pci_express) {
1204 DPRINTK(PROBE, WARNING, "This device (id %04x:%04x) will no "
1205 "longer be supported by this driver in the future.\n",
1206 pdev->vendor, pdev->device);
1207 DPRINTK(PROBE, WARNING, "please use the \"e1000e\" "
1208 "driver instead.\n");
1211 /* reset the hardware with the new settings */
1212 e1000_reset(adapter);
1214 /* If the controller is 82573 and f/w is AMT, do not set
1215 * DRV_LOAD until the interface is up. For all other cases,
1216 * let the f/w know that the h/w is now under the control
1218 if (hw->mac_type != e1000_82573 ||
1219 !e1000_check_mng_mode(hw))
1220 e1000_get_hw_control(adapter);
1222 /* tell the stack to leave us alone until e1000_open() is called */
1223 netif_carrier_off(netdev);
1224 netif_stop_queue(netdev);
1226 strcpy(netdev->name, "eth%d");
1227 err = register_netdev(netdev);
1231 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
1237 e1000_release_hw_control(adapter);
1239 if (!e1000_check_phy_reset_block(hw))
1240 e1000_phy_hw_reset(hw);
1242 if (hw->flash_address)
1243 iounmap(hw->flash_address);
1245 for (i = 0; i < adapter->num_rx_queues; i++)
1246 dev_put(&adapter->polling_netdev[i]);
1248 kfree(adapter->tx_ring);
1249 kfree(adapter->rx_ring);
1250 kfree(adapter->polling_netdev);
1252 iounmap(hw->hw_addr);
1254 free_netdev(netdev);
1256 pci_release_selected_regions(pdev, bars);
1259 pci_disable_device(pdev);
1264 * e1000_remove - Device Removal Routine
1265 * @pdev: PCI device information struct
1267 * e1000_remove is called by the PCI subsystem to alert the driver
1268 * that it should release a PCI device. The could be caused by a
1269 * Hot-Plug event, or because the driver is going to be removed from
1273 static void __devexit e1000_remove(struct pci_dev *pdev)
1275 struct net_device *netdev = pci_get_drvdata(pdev);
1276 struct e1000_adapter *adapter = netdev_priv(netdev);
1277 struct e1000_hw *hw = &adapter->hw;
1280 cancel_work_sync(&adapter->reset_task);
1282 e1000_release_manageability(adapter);
1284 /* Release control of h/w to f/w. If f/w is AMT enabled, this
1285 * would have already happened in close and is redundant. */
1286 e1000_release_hw_control(adapter);
1288 for (i = 0; i < adapter->num_rx_queues; i++)
1289 dev_put(&adapter->polling_netdev[i]);
1291 unregister_netdev(netdev);
1293 if (!e1000_check_phy_reset_block(hw))
1294 e1000_phy_hw_reset(hw);
1296 kfree(adapter->tx_ring);
1297 kfree(adapter->rx_ring);
1298 kfree(adapter->polling_netdev);
1300 iounmap(hw->hw_addr);
1301 if (hw->flash_address)
1302 iounmap(hw->flash_address);
1303 pci_release_selected_regions(pdev, adapter->bars);
1305 free_netdev(netdev);
1307 pci_disable_device(pdev);
1311 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1312 * @adapter: board private structure to initialize
1314 * e1000_sw_init initializes the Adapter private data structure.
1315 * Fields are initialized based on PCI device information and
1316 * OS network device settings (MTU size).
1319 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1321 struct e1000_hw *hw = &adapter->hw;
1322 struct net_device *netdev = adapter->netdev;
1323 struct pci_dev *pdev = adapter->pdev;
1326 /* PCI config space info */
1328 hw->vendor_id = pdev->vendor;
1329 hw->device_id = pdev->device;
1330 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1331 hw->subsystem_id = pdev->subsystem_device;
1332 hw->revision_id = pdev->revision;
1334 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1336 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1337 hw->max_frame_size = netdev->mtu +
1338 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1339 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1341 /* identify the MAC */
1343 if (e1000_set_mac_type(hw)) {
1344 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1348 switch (hw->mac_type) {
1353 case e1000_82541_rev_2:
1354 case e1000_82547_rev_2:
1355 hw->phy_init_script = 1;
1359 e1000_set_media_type(hw);
1361 hw->wait_autoneg_complete = false;
1362 hw->tbi_compatibility_en = true;
1363 hw->adaptive_ifs = true;
1365 /* Copper options */
1367 if (hw->media_type == e1000_media_type_copper) {
1368 hw->mdix = AUTO_ALL_MODES;
1369 hw->disable_polarity_correction = false;
1370 hw->master_slave = E1000_MASTER_SLAVE;
1373 adapter->num_tx_queues = 1;
1374 adapter->num_rx_queues = 1;
1376 if (e1000_alloc_queues(adapter)) {
1377 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1381 for (i = 0; i < adapter->num_rx_queues; i++) {
1382 adapter->polling_netdev[i].priv = adapter;
1383 dev_hold(&adapter->polling_netdev[i]);
1384 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1386 spin_lock_init(&adapter->tx_queue_lock);
1388 /* Explicitly disable IRQ since the NIC can be in any state. */
1389 e1000_irq_disable(adapter);
1391 spin_lock_init(&adapter->stats_lock);
1393 set_bit(__E1000_DOWN, &adapter->flags);
1399 * e1000_alloc_queues - Allocate memory for all rings
1400 * @adapter: board private structure to initialize
1402 * We allocate one ring per queue at run-time since we don't know the
1403 * number of queues at compile-time. The polling_netdev array is
1404 * intended for Multiqueue, but should work fine with a single queue.
1407 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1409 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1410 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1411 if (!adapter->tx_ring)
1414 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1415 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1416 if (!adapter->rx_ring) {
1417 kfree(adapter->tx_ring);
1421 adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
1422 sizeof(struct net_device),
1424 if (!adapter->polling_netdev) {
1425 kfree(adapter->tx_ring);
1426 kfree(adapter->rx_ring);
1430 return E1000_SUCCESS;
1434 * e1000_open - Called when a network interface is made active
1435 * @netdev: network interface device structure
1437 * Returns 0 on success, negative value on failure
1439 * The open entry point is called when a network interface is made
1440 * active by the system (IFF_UP). At this point all resources needed
1441 * for transmit and receive operations are allocated, the interrupt
1442 * handler is registered with the OS, the watchdog timer is started,
1443 * and the stack is notified that the interface is ready.
1446 static int e1000_open(struct net_device *netdev)
1448 struct e1000_adapter *adapter = netdev_priv(netdev);
1449 struct e1000_hw *hw = &adapter->hw;
1452 /* disallow open during test */
1453 if (test_bit(__E1000_TESTING, &adapter->flags))
1456 /* allocate transmit descriptors */
1457 err = e1000_setup_all_tx_resources(adapter);
1461 /* allocate receive descriptors */
1462 err = e1000_setup_all_rx_resources(adapter);
1466 e1000_power_up_phy(adapter);
1468 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1469 if ((hw->mng_cookie.status &
1470 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1471 e1000_update_mng_vlan(adapter);
1474 /* If AMT is enabled, let the firmware know that the network
1475 * interface is now open */
1476 if (hw->mac_type == e1000_82573 &&
1477 e1000_check_mng_mode(hw))
1478 e1000_get_hw_control(adapter);
1480 /* before we allocate an interrupt, we must be ready to handle it.
1481 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1482 * as soon as we call pci_request_irq, so we have to setup our
1483 * clean_rx handler before we do so. */
1484 e1000_configure(adapter);
1486 err = e1000_request_irq(adapter);
1490 /* From here on the code is the same as e1000_up() */
1491 clear_bit(__E1000_DOWN, &adapter->flags);
1493 napi_enable(&adapter->napi);
1495 e1000_irq_enable(adapter);
1497 netif_start_queue(netdev);
1499 /* fire a link status change interrupt to start the watchdog */
1500 ew32(ICS, E1000_ICS_LSC);
1502 return E1000_SUCCESS;
1505 e1000_release_hw_control(adapter);
1506 e1000_power_down_phy(adapter);
1507 e1000_free_all_rx_resources(adapter);
1509 e1000_free_all_tx_resources(adapter);
1511 e1000_reset(adapter);
1517 * e1000_close - Disables a network interface
1518 * @netdev: network interface device structure
1520 * Returns 0, this is not allowed to fail
1522 * The close entry point is called when an interface is de-activated
1523 * by the OS. The hardware is still under the drivers control, but
1524 * needs to be disabled. A global MAC reset is issued to stop the
1525 * hardware, and all transmit and receive resources are freed.
1528 static int e1000_close(struct net_device *netdev)
1530 struct e1000_adapter *adapter = netdev_priv(netdev);
1531 struct e1000_hw *hw = &adapter->hw;
1533 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1534 e1000_down(adapter);
1535 e1000_power_down_phy(adapter);
1536 e1000_free_irq(adapter);
1538 e1000_free_all_tx_resources(adapter);
1539 e1000_free_all_rx_resources(adapter);
1541 /* kill manageability vlan ID if supported, but not if a vlan with
1542 * the same ID is registered on the host OS (let 8021q kill it) */
1543 if ((hw->mng_cookie.status &
1544 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1546 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
1547 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1550 /* If AMT is enabled, let the firmware know that the network
1551 * interface is now closed */
1552 if (hw->mac_type == e1000_82573 &&
1553 e1000_check_mng_mode(hw))
1554 e1000_release_hw_control(adapter);
1560 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1561 * @adapter: address of board private structure
1562 * @start: address of beginning of memory
1563 * @len: length of memory
1565 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1568 struct e1000_hw *hw = &adapter->hw;
1569 unsigned long begin = (unsigned long)start;
1570 unsigned long end = begin + len;
1572 /* First rev 82545 and 82546 need to not allow any memory
1573 * write location to cross 64k boundary due to errata 23 */
1574 if (hw->mac_type == e1000_82545 ||
1575 hw->mac_type == e1000_82546) {
1576 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1583 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1584 * @adapter: board private structure
1585 * @txdr: tx descriptor ring (for a specific queue) to setup
1587 * Return 0 on success, negative on failure
1590 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1591 struct e1000_tx_ring *txdr)
1593 struct pci_dev *pdev = adapter->pdev;
1596 size = sizeof(struct e1000_buffer) * txdr->count;
1597 txdr->buffer_info = vmalloc(size);
1598 if (!txdr->buffer_info) {
1600 "Unable to allocate memory for the transmit descriptor ring\n");
1603 memset(txdr->buffer_info, 0, size);
1605 /* round up to nearest 4K */
1607 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1608 txdr->size = ALIGN(txdr->size, 4096);
1610 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1613 vfree(txdr->buffer_info);
1615 "Unable to allocate memory for the transmit descriptor ring\n");
1619 /* Fix for errata 23, can't cross 64kB boundary */
1620 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1621 void *olddesc = txdr->desc;
1622 dma_addr_t olddma = txdr->dma;
1623 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1624 "at %p\n", txdr->size, txdr->desc);
1625 /* Try again, without freeing the previous */
1626 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1627 /* Failed allocation, critical failure */
1629 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1630 goto setup_tx_desc_die;
1633 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1635 pci_free_consistent(pdev, txdr->size, txdr->desc,
1637 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1639 "Unable to allocate aligned memory "
1640 "for the transmit descriptor ring\n");
1641 vfree(txdr->buffer_info);
1644 /* Free old allocation, new allocation was successful */
1645 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1648 memset(txdr->desc, 0, txdr->size);
1650 txdr->next_to_use = 0;
1651 txdr->next_to_clean = 0;
1652 spin_lock_init(&txdr->tx_lock);
1658 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1659 * (Descriptors) for all queues
1660 * @adapter: board private structure
1662 * Return 0 on success, negative on failure
1665 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1669 for (i = 0; i < adapter->num_tx_queues; i++) {
1670 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1673 "Allocation for Tx Queue %u failed\n", i);
1674 for (i-- ; i >= 0; i--)
1675 e1000_free_tx_resources(adapter,
1676 &adapter->tx_ring[i]);
1685 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1686 * @adapter: board private structure
1688 * Configure the Tx unit of the MAC after a reset.
1691 static void e1000_configure_tx(struct e1000_adapter *adapter)
1694 struct e1000_hw *hw = &adapter->hw;
1695 u32 tdlen, tctl, tipg, tarc;
1698 /* Setup the HW Tx Head and Tail descriptor pointers */
1700 switch (adapter->num_tx_queues) {
1703 tdba = adapter->tx_ring[0].dma;
1704 tdlen = adapter->tx_ring[0].count *
1705 sizeof(struct e1000_tx_desc);
1707 ew32(TDBAH, (tdba >> 32));
1708 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1711 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1712 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1716 /* Set the default values for the Tx Inter Packet Gap timer */
1717 if (hw->mac_type <= e1000_82547_rev_2 &&
1718 (hw->media_type == e1000_media_type_fiber ||
1719 hw->media_type == e1000_media_type_internal_serdes))
1720 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1722 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1724 switch (hw->mac_type) {
1725 case e1000_82542_rev2_0:
1726 case e1000_82542_rev2_1:
1727 tipg = DEFAULT_82542_TIPG_IPGT;
1728 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1729 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1731 case e1000_80003es2lan:
1732 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1733 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1736 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1737 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1740 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1741 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1744 /* Set the Tx Interrupt Delay register */
1746 ew32(TIDV, adapter->tx_int_delay);
1747 if (hw->mac_type >= e1000_82540)
1748 ew32(TADV, adapter->tx_abs_int_delay);
1750 /* Program the Transmit Control Register */
1753 tctl &= ~E1000_TCTL_CT;
1754 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1755 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1757 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1759 /* set the speed mode bit, we'll clear it if we're not at
1760 * gigabit link later */
1763 } else if (hw->mac_type == e1000_80003es2lan) {
1772 e1000_config_collision_dist(hw);
1774 /* Setup Transmit Descriptor Settings for eop descriptor */
1775 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1777 /* only set IDE if we are delaying interrupts using the timers */
1778 if (adapter->tx_int_delay)
1779 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1781 if (hw->mac_type < e1000_82543)
1782 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1784 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1786 /* Cache if we're 82544 running in PCI-X because we'll
1787 * need this to apply a workaround later in the send path. */
1788 if (hw->mac_type == e1000_82544 &&
1789 hw->bus_type == e1000_bus_type_pcix)
1790 adapter->pcix_82544 = 1;
1797 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1798 * @adapter: board private structure
1799 * @rxdr: rx descriptor ring (for a specific queue) to setup
1801 * Returns 0 on success, negative on failure
1804 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1805 struct e1000_rx_ring *rxdr)
1807 struct e1000_hw *hw = &adapter->hw;
1808 struct pci_dev *pdev = adapter->pdev;
1811 size = sizeof(struct e1000_buffer) * rxdr->count;
1812 rxdr->buffer_info = vmalloc(size);
1813 if (!rxdr->buffer_info) {
1815 "Unable to allocate memory for the receive descriptor ring\n");
1818 memset(rxdr->buffer_info, 0, size);
1820 if (hw->mac_type <= e1000_82547_rev_2)
1821 desc_len = sizeof(struct e1000_rx_desc);
1823 desc_len = sizeof(union e1000_rx_desc_packet_split);
1825 /* Round up to nearest 4K */
1827 rxdr->size = rxdr->count * desc_len;
1828 rxdr->size = ALIGN(rxdr->size, 4096);
1830 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1834 "Unable to allocate memory for the receive descriptor ring\n");
1836 vfree(rxdr->buffer_info);
1840 /* Fix for errata 23, can't cross 64kB boundary */
1841 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1842 void *olddesc = rxdr->desc;
1843 dma_addr_t olddma = rxdr->dma;
1844 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1845 "at %p\n", rxdr->size, rxdr->desc);
1846 /* Try again, without freeing the previous */
1847 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1848 /* Failed allocation, critical failure */
1850 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1852 "Unable to allocate memory "
1853 "for the receive descriptor ring\n");
1854 goto setup_rx_desc_die;
1857 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1859 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1861 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1863 "Unable to allocate aligned memory "
1864 "for the receive descriptor ring\n");
1865 goto setup_rx_desc_die;
1867 /* Free old allocation, new allocation was successful */
1868 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1871 memset(rxdr->desc, 0, rxdr->size);
1873 rxdr->next_to_clean = 0;
1874 rxdr->next_to_use = 0;
1880 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1881 * (Descriptors) for all queues
1882 * @adapter: board private structure
1884 * Return 0 on success, negative on failure
1887 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1891 for (i = 0; i < adapter->num_rx_queues; i++) {
1892 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1895 "Allocation for Rx Queue %u failed\n", i);
1896 for (i-- ; i >= 0; i--)
1897 e1000_free_rx_resources(adapter,
1898 &adapter->rx_ring[i]);
1907 * e1000_setup_rctl - configure the receive control registers
1908 * @adapter: Board private structure
1910 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1911 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1912 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1914 struct e1000_hw *hw = &adapter->hw;
1919 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1921 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1922 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1923 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1925 if (hw->tbi_compatibility_on == 1)
1926 rctl |= E1000_RCTL_SBP;
1928 rctl &= ~E1000_RCTL_SBP;
1930 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1931 rctl &= ~E1000_RCTL_LPE;
1933 rctl |= E1000_RCTL_LPE;
1935 /* Setup buffer sizes */
1936 rctl &= ~E1000_RCTL_SZ_4096;
1937 rctl |= E1000_RCTL_BSEX;
1938 switch (adapter->rx_buffer_len) {
1939 case E1000_RXBUFFER_256:
1940 rctl |= E1000_RCTL_SZ_256;
1941 rctl &= ~E1000_RCTL_BSEX;
1943 case E1000_RXBUFFER_512:
1944 rctl |= E1000_RCTL_SZ_512;
1945 rctl &= ~E1000_RCTL_BSEX;
1947 case E1000_RXBUFFER_1024:
1948 rctl |= E1000_RCTL_SZ_1024;
1949 rctl &= ~E1000_RCTL_BSEX;
1951 case E1000_RXBUFFER_2048:
1953 rctl |= E1000_RCTL_SZ_2048;
1954 rctl &= ~E1000_RCTL_BSEX;
1956 case E1000_RXBUFFER_4096:
1957 rctl |= E1000_RCTL_SZ_4096;
1959 case E1000_RXBUFFER_8192:
1960 rctl |= E1000_RCTL_SZ_8192;
1962 case E1000_RXBUFFER_16384:
1963 rctl |= E1000_RCTL_SZ_16384;
1971 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1972 * @adapter: board private structure
1974 * Configure the Rx unit of the MAC after a reset.
1977 static void e1000_configure_rx(struct e1000_adapter *adapter)
1980 struct e1000_hw *hw = &adapter->hw;
1981 u32 rdlen, rctl, rxcsum, ctrl_ext;
1983 rdlen = adapter->rx_ring[0].count *
1984 sizeof(struct e1000_rx_desc);
1985 adapter->clean_rx = e1000_clean_rx_irq;
1986 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1988 /* disable receives while setting up the descriptors */
1990 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1992 /* set the Receive Delay Timer Register */
1993 ew32(RDTR, adapter->rx_int_delay);
1995 if (hw->mac_type >= e1000_82540) {
1996 ew32(RADV, adapter->rx_abs_int_delay);
1997 if (adapter->itr_setting != 0)
1998 ew32(ITR, 1000000000 / (adapter->itr * 256));
2001 if (hw->mac_type >= e1000_82571) {
2002 ctrl_ext = er32(CTRL_EXT);
2003 /* Reset delay timers after every interrupt */
2004 ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2005 /* Auto-Mask interrupts upon ICR access */
2006 ctrl_ext |= E1000_CTRL_EXT_IAME;
2007 ew32(IAM, 0xffffffff);
2008 ew32(CTRL_EXT, ctrl_ext);
2009 E1000_WRITE_FLUSH();
2012 /* Setup the HW Rx Head and Tail Descriptor Pointers and
2013 * the Base and Length of the Rx Descriptor Ring */
2014 switch (adapter->num_rx_queues) {
2017 rdba = adapter->rx_ring[0].dma;
2019 ew32(RDBAH, (rdba >> 32));
2020 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
2023 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
2024 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
2028 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
2029 if (hw->mac_type >= e1000_82543) {
2030 rxcsum = er32(RXCSUM);
2031 if (adapter->rx_csum)
2032 rxcsum |= E1000_RXCSUM_TUOFL;
2034 /* don't need to clear IPPCSE as it defaults to 0 */
2035 rxcsum &= ~E1000_RXCSUM_TUOFL;
2036 ew32(RXCSUM, rxcsum);
2039 /* Enable Receives */
2044 * e1000_free_tx_resources - Free Tx Resources per Queue
2045 * @adapter: board private structure
2046 * @tx_ring: Tx descriptor ring for a specific queue
2048 * Free all transmit software resources
2051 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
2052 struct e1000_tx_ring *tx_ring)
2054 struct pci_dev *pdev = adapter->pdev;
2056 e1000_clean_tx_ring(adapter, tx_ring);
2058 vfree(tx_ring->buffer_info);
2059 tx_ring->buffer_info = NULL;
2061 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2063 tx_ring->desc = NULL;
2067 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
2068 * @adapter: board private structure
2070 * Free all transmit software resources
2073 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
2077 for (i = 0; i < adapter->num_tx_queues; i++)
2078 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
2081 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
2082 struct e1000_buffer *buffer_info)
2084 if (buffer_info->dma) {
2085 pci_unmap_page(adapter->pdev,
2087 buffer_info->length,
2089 buffer_info->dma = 0;
2091 if (buffer_info->skb) {
2092 dev_kfree_skb_any(buffer_info->skb);
2093 buffer_info->skb = NULL;
2095 /* buffer_info must be completely set up in the transmit path */
2099 * e1000_clean_tx_ring - Free Tx Buffers
2100 * @adapter: board private structure
2101 * @tx_ring: ring to be cleaned
2104 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
2105 struct e1000_tx_ring *tx_ring)
2107 struct e1000_hw *hw = &adapter->hw;
2108 struct e1000_buffer *buffer_info;
2112 /* Free all the Tx ring sk_buffs */
2114 for (i = 0; i < tx_ring->count; i++) {
2115 buffer_info = &tx_ring->buffer_info[i];
2116 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2119 size = sizeof(struct e1000_buffer) * tx_ring->count;
2120 memset(tx_ring->buffer_info, 0, size);
2122 /* Zero out the descriptor ring */
2124 memset(tx_ring->desc, 0, tx_ring->size);
2126 tx_ring->next_to_use = 0;
2127 tx_ring->next_to_clean = 0;
2128 tx_ring->last_tx_tso = 0;
2130 writel(0, hw->hw_addr + tx_ring->tdh);
2131 writel(0, hw->hw_addr + tx_ring->tdt);
2135 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2136 * @adapter: board private structure
2139 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2143 for (i = 0; i < adapter->num_tx_queues; i++)
2144 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2148 * e1000_free_rx_resources - Free Rx Resources
2149 * @adapter: board private structure
2150 * @rx_ring: ring to clean the resources from
2152 * Free all receive software resources
2155 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2156 struct e1000_rx_ring *rx_ring)
2158 struct pci_dev *pdev = adapter->pdev;
2160 e1000_clean_rx_ring(adapter, rx_ring);
2162 vfree(rx_ring->buffer_info);
2163 rx_ring->buffer_info = NULL;
2165 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2167 rx_ring->desc = NULL;
2171 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2172 * @adapter: board private structure
2174 * Free all receive software resources
2177 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2181 for (i = 0; i < adapter->num_rx_queues; i++)
2182 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2186 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2187 * @adapter: board private structure
2188 * @rx_ring: ring to free buffers from
2191 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2192 struct e1000_rx_ring *rx_ring)
2194 struct e1000_hw *hw = &adapter->hw;
2195 struct e1000_buffer *buffer_info;
2196 struct pci_dev *pdev = adapter->pdev;
2200 /* Free all the Rx ring sk_buffs */
2201 for (i = 0; i < rx_ring->count; i++) {
2202 buffer_info = &rx_ring->buffer_info[i];
2203 if (buffer_info->skb) {
2204 pci_unmap_single(pdev,
2206 buffer_info->length,
2207 PCI_DMA_FROMDEVICE);
2209 dev_kfree_skb(buffer_info->skb);
2210 buffer_info->skb = NULL;
2214 size = sizeof(struct e1000_buffer) * rx_ring->count;
2215 memset(rx_ring->buffer_info, 0, size);
2217 /* Zero out the descriptor ring */
2219 memset(rx_ring->desc, 0, rx_ring->size);
2221 rx_ring->next_to_clean = 0;
2222 rx_ring->next_to_use = 0;
2224 writel(0, hw->hw_addr + rx_ring->rdh);
2225 writel(0, hw->hw_addr + rx_ring->rdt);
2229 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2230 * @adapter: board private structure
2233 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2237 for (i = 0; i < adapter->num_rx_queues; i++)
2238 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2241 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2242 * and memory write and invalidate disabled for certain operations
2244 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2246 struct e1000_hw *hw = &adapter->hw;
2247 struct net_device *netdev = adapter->netdev;
2250 e1000_pci_clear_mwi(hw);
2253 rctl |= E1000_RCTL_RST;
2255 E1000_WRITE_FLUSH();
2258 if (netif_running(netdev))
2259 e1000_clean_all_rx_rings(adapter);
2262 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2264 struct e1000_hw *hw = &adapter->hw;
2265 struct net_device *netdev = adapter->netdev;
2269 rctl &= ~E1000_RCTL_RST;
2271 E1000_WRITE_FLUSH();
2274 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2275 e1000_pci_set_mwi(hw);
2277 if (netif_running(netdev)) {
2278 /* No need to loop, because 82542 supports only 1 queue */
2279 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2280 e1000_configure_rx(adapter);
2281 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2286 * e1000_set_mac - Change the Ethernet Address of the NIC
2287 * @netdev: network interface device structure
2288 * @p: pointer to an address structure
2290 * Returns 0 on success, negative on failure
2293 static int e1000_set_mac(struct net_device *netdev, void *p)
2295 struct e1000_adapter *adapter = netdev_priv(netdev);
2296 struct e1000_hw *hw = &adapter->hw;
2297 struct sockaddr *addr = p;
2299 if (!is_valid_ether_addr(addr->sa_data))
2300 return -EADDRNOTAVAIL;
2302 /* 82542 2.0 needs to be in reset to write receive address registers */
2304 if (hw->mac_type == e1000_82542_rev2_0)
2305 e1000_enter_82542_rst(adapter);
2307 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2308 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2310 e1000_rar_set(hw, hw->mac_addr, 0);
2312 /* With 82571 controllers, LAA may be overwritten (with the default)
2313 * due to controller reset from the other port. */
2314 if (hw->mac_type == e1000_82571) {
2315 /* activate the work around */
2316 hw->laa_is_present = 1;
2318 /* Hold a copy of the LAA in RAR[14] This is done so that
2319 * between the time RAR[0] gets clobbered and the time it
2320 * gets fixed (in e1000_watchdog), the actual LAA is in one
2321 * of the RARs and no incoming packets directed to this port
2322 * are dropped. Eventaully the LAA will be in RAR[0] and
2324 e1000_rar_set(hw, hw->mac_addr,
2325 E1000_RAR_ENTRIES - 1);
2328 if (hw->mac_type == e1000_82542_rev2_0)
2329 e1000_leave_82542_rst(adapter);
2335 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2336 * @netdev: network interface device structure
2338 * The set_rx_mode entry point is called whenever the unicast or multicast
2339 * address lists or the network interface flags are updated. This routine is
2340 * responsible for configuring the hardware for proper unicast, multicast,
2341 * promiscuous mode, and all-multi behavior.
2344 static void e1000_set_rx_mode(struct net_device *netdev)
2346 struct e1000_adapter *adapter = netdev_priv(netdev);
2347 struct e1000_hw *hw = &adapter->hw;
2348 struct dev_addr_list *uc_ptr;
2349 struct dev_addr_list *mc_ptr;
2352 int i, rar_entries = E1000_RAR_ENTRIES;
2353 int mta_reg_count = (hw->mac_type == e1000_ich8lan) ?
2354 E1000_NUM_MTA_REGISTERS_ICH8LAN :
2355 E1000_NUM_MTA_REGISTERS;
2357 if (hw->mac_type == e1000_ich8lan)
2358 rar_entries = E1000_RAR_ENTRIES_ICH8LAN;
2360 /* reserve RAR[14] for LAA over-write work-around */
2361 if (hw->mac_type == e1000_82571)
2364 /* Check for Promiscuous and All Multicast modes */
2368 if (netdev->flags & IFF_PROMISC) {
2369 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2370 rctl &= ~E1000_RCTL_VFE;
2372 if (netdev->flags & IFF_ALLMULTI) {
2373 rctl |= E1000_RCTL_MPE;
2375 rctl &= ~E1000_RCTL_MPE;
2377 if (adapter->hw.mac_type != e1000_ich8lan)
2378 rctl |= E1000_RCTL_VFE;
2382 if (netdev->uc_count > rar_entries - 1) {
2383 rctl |= E1000_RCTL_UPE;
2384 } else if (!(netdev->flags & IFF_PROMISC)) {
2385 rctl &= ~E1000_RCTL_UPE;
2386 uc_ptr = netdev->uc_list;
2391 /* 82542 2.0 needs to be in reset to write receive address registers */
2393 if (hw->mac_type == e1000_82542_rev2_0)
2394 e1000_enter_82542_rst(adapter);
2396 /* load the first 14 addresses into the exact filters 1-14. Unicast
2397 * addresses take precedence to avoid disabling unicast filtering
2400 * RAR 0 is used for the station MAC adddress
2401 * if there are not 14 addresses, go ahead and clear the filters
2402 * -- with 82571 controllers only 0-13 entries are filled here
2404 mc_ptr = netdev->mc_list;
2406 for (i = 1; i < rar_entries; i++) {
2408 e1000_rar_set(hw, uc_ptr->da_addr, i);
2409 uc_ptr = uc_ptr->next;
2410 } else if (mc_ptr) {
2411 e1000_rar_set(hw, mc_ptr->da_addr, i);
2412 mc_ptr = mc_ptr->next;
2414 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2415 E1000_WRITE_FLUSH();
2416 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2417 E1000_WRITE_FLUSH();
2420 WARN_ON(uc_ptr != NULL);
2422 /* clear the old settings from the multicast hash table */
2424 for (i = 0; i < mta_reg_count; i++) {
2425 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2426 E1000_WRITE_FLUSH();
2429 /* load any remaining addresses into the hash table */
2431 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2432 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr);
2433 e1000_mta_set(hw, hash_value);
2436 if (hw->mac_type == e1000_82542_rev2_0)
2437 e1000_leave_82542_rst(adapter);
2440 /* Need to wait a few seconds after link up to get diagnostic information from
2443 static void e1000_update_phy_info(unsigned long data)
2445 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2446 struct e1000_hw *hw = &adapter->hw;
2447 e1000_phy_get_info(hw, &adapter->phy_info);
2451 * e1000_82547_tx_fifo_stall - Timer Call-back
2452 * @data: pointer to adapter cast into an unsigned long
2455 static void e1000_82547_tx_fifo_stall(unsigned long data)
2457 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2458 struct e1000_hw *hw = &adapter->hw;
2459 struct net_device *netdev = adapter->netdev;
2462 if (atomic_read(&adapter->tx_fifo_stall)) {
2463 if ((er32(TDT) == er32(TDH)) &&
2464 (er32(TDFT) == er32(TDFH)) &&
2465 (er32(TDFTS) == er32(TDFHS))) {
2467 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2468 ew32(TDFT, adapter->tx_head_addr);
2469 ew32(TDFH, adapter->tx_head_addr);
2470 ew32(TDFTS, adapter->tx_head_addr);
2471 ew32(TDFHS, adapter->tx_head_addr);
2473 E1000_WRITE_FLUSH();
2475 adapter->tx_fifo_head = 0;
2476 atomic_set(&adapter->tx_fifo_stall, 0);
2477 netif_wake_queue(netdev);
2479 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2485 * e1000_watchdog - Timer Call-back
2486 * @data: pointer to adapter cast into an unsigned long
2488 static void e1000_watchdog(unsigned long data)
2490 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2491 struct e1000_hw *hw = &adapter->hw;
2492 struct net_device *netdev = adapter->netdev;
2493 struct e1000_tx_ring *txdr = adapter->tx_ring;
2497 ret_val = e1000_check_for_link(hw);
2498 if ((ret_val == E1000_ERR_PHY) &&
2499 (hw->phy_type == e1000_phy_igp_3) &&
2500 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
2501 /* See e1000_kumeran_lock_loss_workaround() */
2503 "Gigabit has been disabled, downgrading speed\n");
2506 if (hw->mac_type == e1000_82573) {
2507 e1000_enable_tx_pkt_filtering(hw);
2508 if (adapter->mng_vlan_id != hw->mng_cookie.vlan_id)
2509 e1000_update_mng_vlan(adapter);
2512 if ((hw->media_type == e1000_media_type_internal_serdes) &&
2513 !(er32(TXCW) & E1000_TXCW_ANE))
2514 link = !hw->serdes_link_down;
2516 link = er32(STATUS) & E1000_STATUS_LU;
2519 if (!netif_carrier_ok(netdev)) {
2522 e1000_get_speed_and_duplex(hw,
2523 &adapter->link_speed,
2524 &adapter->link_duplex);
2527 printk(KERN_INFO "e1000: %s NIC Link is Up %d Mbps %s, "
2528 "Flow Control: %s\n",
2530 adapter->link_speed,
2531 adapter->link_duplex == FULL_DUPLEX ?
2532 "Full Duplex" : "Half Duplex",
2533 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2534 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2535 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2536 E1000_CTRL_TFCE) ? "TX" : "None" )));
2538 /* tweak tx_queue_len according to speed/duplex
2539 * and adjust the timeout factor */
2540 netdev->tx_queue_len = adapter->tx_queue_len;
2541 adapter->tx_timeout_factor = 1;
2542 switch (adapter->link_speed) {
2545 netdev->tx_queue_len = 10;
2546 adapter->tx_timeout_factor = 8;
2550 netdev->tx_queue_len = 100;
2551 /* maybe add some timeout factor ? */
2555 if ((hw->mac_type == e1000_82571 ||
2556 hw->mac_type == e1000_82572) &&
2559 tarc0 = er32(TARC0);
2560 tarc0 &= ~(1 << 21);
2564 /* disable TSO for pcie and 10/100 speeds, to avoid
2565 * some hardware issues */
2566 if (!adapter->tso_force &&
2567 hw->bus_type == e1000_bus_type_pci_express){
2568 switch (adapter->link_speed) {
2572 "10/100 speed: disabling TSO\n");
2573 netdev->features &= ~NETIF_F_TSO;
2574 netdev->features &= ~NETIF_F_TSO6;
2577 netdev->features |= NETIF_F_TSO;
2578 netdev->features |= NETIF_F_TSO6;
2586 /* enable transmits in the hardware, need to do this
2587 * after setting TARC0 */
2589 tctl |= E1000_TCTL_EN;
2592 netif_carrier_on(netdev);
2593 netif_wake_queue(netdev);
2594 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2595 adapter->smartspeed = 0;
2597 /* make sure the receive unit is started */
2598 if (hw->rx_needs_kicking) {
2599 u32 rctl = er32(RCTL);
2600 ew32(RCTL, rctl | E1000_RCTL_EN);
2604 if (netif_carrier_ok(netdev)) {
2605 adapter->link_speed = 0;
2606 adapter->link_duplex = 0;
2607 printk(KERN_INFO "e1000: %s NIC Link is Down\n",
2609 netif_carrier_off(netdev);
2610 netif_stop_queue(netdev);
2611 mod_timer(&adapter->phy_info_timer, round_jiffies(jiffies + 2 * HZ));
2613 /* 80003ES2LAN workaround--
2614 * For packet buffer work-around on link down event;
2615 * disable receives in the ISR and
2616 * reset device here in the watchdog
2618 if (hw->mac_type == e1000_80003es2lan)
2620 schedule_work(&adapter->reset_task);
2623 e1000_smartspeed(adapter);
2626 e1000_update_stats(adapter);
2628 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2629 adapter->tpt_old = adapter->stats.tpt;
2630 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2631 adapter->colc_old = adapter->stats.colc;
2633 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2634 adapter->gorcl_old = adapter->stats.gorcl;
2635 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2636 adapter->gotcl_old = adapter->stats.gotcl;
2638 e1000_update_adaptive(hw);
2640 if (!netif_carrier_ok(netdev)) {
2641 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2642 /* We've lost link, so the controller stops DMA,
2643 * but we've got queued Tx work that's never going
2644 * to get done, so reset controller to flush Tx.
2645 * (Do the reset outside of interrupt context). */
2646 adapter->tx_timeout_count++;
2647 schedule_work(&adapter->reset_task);
2651 /* Cause software interrupt to ensure rx ring is cleaned */
2652 ew32(ICS, E1000_ICS_RXDMT0);
2654 /* Force detection of hung controller every watchdog period */
2655 adapter->detect_tx_hung = true;
2657 /* With 82571 controllers, LAA may be overwritten due to controller
2658 * reset from the other port. Set the appropriate LAA in RAR[0] */
2659 if (hw->mac_type == e1000_82571 && hw->laa_is_present)
2660 e1000_rar_set(hw, hw->mac_addr, 0);
2662 /* Reset the timer */
2663 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
2666 enum latency_range {
2670 latency_invalid = 255
2674 * e1000_update_itr - update the dynamic ITR value based on statistics
2675 * Stores a new ITR value based on packets and byte
2676 * counts during the last interrupt. The advantage of per interrupt
2677 * computation is faster updates and more accurate ITR for the current
2678 * traffic pattern. Constants in this function were computed
2679 * based on theoretical maximum wire speed and thresholds were set based
2680 * on testing data as well as attempting to minimize response time
2681 * while increasing bulk throughput.
2682 * this functionality is controlled by the InterruptThrottleRate module
2683 * parameter (see e1000_param.c)
2684 * @adapter: pointer to adapter
2685 * @itr_setting: current adapter->itr
2686 * @packets: the number of packets during this measurement interval
2687 * @bytes: the number of bytes during this measurement interval
2689 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2690 u16 itr_setting, int packets, int bytes)
2692 unsigned int retval = itr_setting;
2693 struct e1000_hw *hw = &adapter->hw;
2695 if (unlikely(hw->mac_type < e1000_82540))
2696 goto update_itr_done;
2699 goto update_itr_done;
2701 switch (itr_setting) {
2702 case lowest_latency:
2703 /* jumbo frames get bulk treatment*/
2704 if (bytes/packets > 8000)
2705 retval = bulk_latency;
2706 else if ((packets < 5) && (bytes > 512))
2707 retval = low_latency;
2709 case low_latency: /* 50 usec aka 20000 ints/s */
2710 if (bytes > 10000) {
2711 /* jumbo frames need bulk latency setting */
2712 if (bytes/packets > 8000)
2713 retval = bulk_latency;
2714 else if ((packets < 10) || ((bytes/packets) > 1200))
2715 retval = bulk_latency;
2716 else if ((packets > 35))
2717 retval = lowest_latency;
2718 } else if (bytes/packets > 2000)
2719 retval = bulk_latency;
2720 else if (packets <= 2 && bytes < 512)
2721 retval = lowest_latency;
2723 case bulk_latency: /* 250 usec aka 4000 ints/s */
2724 if (bytes > 25000) {
2726 retval = low_latency;
2727 } else if (bytes < 6000) {
2728 retval = low_latency;
2737 static void e1000_set_itr(struct e1000_adapter *adapter)
2739 struct e1000_hw *hw = &adapter->hw;
2741 u32 new_itr = adapter->itr;
2743 if (unlikely(hw->mac_type < e1000_82540))
2746 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2747 if (unlikely(adapter->link_speed != SPEED_1000)) {
2753 adapter->tx_itr = e1000_update_itr(adapter,
2755 adapter->total_tx_packets,
2756 adapter->total_tx_bytes);
2757 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2758 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2759 adapter->tx_itr = low_latency;
2761 adapter->rx_itr = e1000_update_itr(adapter,
2763 adapter->total_rx_packets,
2764 adapter->total_rx_bytes);
2765 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2766 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2767 adapter->rx_itr = low_latency;
2769 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2771 switch (current_itr) {
2772 /* counts and packets in update_itr are dependent on these numbers */
2773 case lowest_latency:
2777 new_itr = 20000; /* aka hwitr = ~200 */
2787 if (new_itr != adapter->itr) {
2788 /* this attempts to bias the interrupt rate towards Bulk
2789 * by adding intermediate steps when interrupt rate is
2791 new_itr = new_itr > adapter->itr ?
2792 min(adapter->itr + (new_itr >> 2), new_itr) :
2794 adapter->itr = new_itr;
2795 ew32(ITR, 1000000000 / (new_itr * 256));
2801 #define E1000_TX_FLAGS_CSUM 0x00000001
2802 #define E1000_TX_FLAGS_VLAN 0x00000002
2803 #define E1000_TX_FLAGS_TSO 0x00000004
2804 #define E1000_TX_FLAGS_IPV4 0x00000008
2805 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2806 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2808 static int e1000_tso(struct e1000_adapter *adapter,
2809 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2811 struct e1000_context_desc *context_desc;
2812 struct e1000_buffer *buffer_info;
2815 u16 ipcse = 0, tucse, mss;
2816 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2819 if (skb_is_gso(skb)) {
2820 if (skb_header_cloned(skb)) {
2821 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2826 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2827 mss = skb_shinfo(skb)->gso_size;
2828 if (skb->protocol == htons(ETH_P_IP)) {
2829 struct iphdr *iph = ip_hdr(skb);
2832 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2836 cmd_length = E1000_TXD_CMD_IP;
2837 ipcse = skb_transport_offset(skb) - 1;
2838 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2839 ipv6_hdr(skb)->payload_len = 0;
2840 tcp_hdr(skb)->check =
2841 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2842 &ipv6_hdr(skb)->daddr,
2846 ipcss = skb_network_offset(skb);
2847 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2848 tucss = skb_transport_offset(skb);
2849 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2852 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2853 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2855 i = tx_ring->next_to_use;
2856 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2857 buffer_info = &tx_ring->buffer_info[i];
2859 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2860 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2861 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2862 context_desc->upper_setup.tcp_fields.tucss = tucss;
2863 context_desc->upper_setup.tcp_fields.tucso = tucso;
2864 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2865 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2866 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2867 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2869 buffer_info->time_stamp = jiffies;
2870 buffer_info->next_to_watch = i;
2872 if (++i == tx_ring->count) i = 0;
2873 tx_ring->next_to_use = i;
2880 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2881 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2883 struct e1000_context_desc *context_desc;
2884 struct e1000_buffer *buffer_info;
2887 u32 cmd_len = E1000_TXD_CMD_DEXT;
2889 if (skb->ip_summed != CHECKSUM_PARTIAL)
2892 switch (skb->protocol) {
2893 case __constant_htons(ETH_P_IP):
2894 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2895 cmd_len |= E1000_TXD_CMD_TCP;
2897 case __constant_htons(ETH_P_IPV6):
2898 /* XXX not handling all IPV6 headers */
2899 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2900 cmd_len |= E1000_TXD_CMD_TCP;
2903 if (unlikely(net_ratelimit()))
2904 DPRINTK(DRV, WARNING,
2905 "checksum_partial proto=%x!\n", skb->protocol);
2909 css = skb_transport_offset(skb);
2911 i = tx_ring->next_to_use;
2912 buffer_info = &tx_ring->buffer_info[i];
2913 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2915 context_desc->lower_setup.ip_config = 0;
2916 context_desc->upper_setup.tcp_fields.tucss = css;
2917 context_desc->upper_setup.tcp_fields.tucso =
2918 css + skb->csum_offset;
2919 context_desc->upper_setup.tcp_fields.tucse = 0;
2920 context_desc->tcp_seg_setup.data = 0;
2921 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2923 buffer_info->time_stamp = jiffies;
2924 buffer_info->next_to_watch = i;
2926 if (unlikely(++i == tx_ring->count)) i = 0;
2927 tx_ring->next_to_use = i;
2932 #define E1000_MAX_TXD_PWR 12
2933 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2935 static int e1000_tx_map(struct e1000_adapter *adapter,
2936 struct e1000_tx_ring *tx_ring,
2937 struct sk_buff *skb, unsigned int first,
2938 unsigned int max_per_txd, unsigned int nr_frags,
2941 struct e1000_hw *hw = &adapter->hw;
2942 struct e1000_buffer *buffer_info;
2943 unsigned int len = skb->len;
2944 unsigned int offset = 0, size, count = 0, i;
2946 len -= skb->data_len;
2948 i = tx_ring->next_to_use;
2951 buffer_info = &tx_ring->buffer_info[i];
2952 size = min(len, max_per_txd);
2953 /* Workaround for Controller erratum --
2954 * descriptor for non-tso packet in a linear SKB that follows a
2955 * tso gets written back prematurely before the data is fully
2956 * DMA'd to the controller */
2957 if (!skb->data_len && tx_ring->last_tx_tso &&
2959 tx_ring->last_tx_tso = 0;
2963 /* Workaround for premature desc write-backs
2964 * in TSO mode. Append 4-byte sentinel desc */
2965 if (unlikely(mss && !nr_frags && size == len && size > 8))
2967 /* work-around for errata 10 and it applies
2968 * to all controllers in PCI-X mode
2969 * The fix is to make sure that the first descriptor of a
2970 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2972 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2973 (size > 2015) && count == 0))
2976 /* Workaround for potential 82544 hang in PCI-X. Avoid
2977 * terminating buffers within evenly-aligned dwords. */
2978 if (unlikely(adapter->pcix_82544 &&
2979 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2983 buffer_info->length = size;
2985 pci_map_single(adapter->pdev,
2989 buffer_info->time_stamp = jiffies;
2990 buffer_info->next_to_watch = i;
2995 if (unlikely(++i == tx_ring->count)) i = 0;
2998 for (f = 0; f < nr_frags; f++) {
2999 struct skb_frag_struct *frag;
3001 frag = &skb_shinfo(skb)->frags[f];
3003 offset = frag->page_offset;
3006 buffer_info = &tx_ring->buffer_info[i];
3007 size = min(len, max_per_txd);
3008 /* Workaround for premature desc write-backs
3009 * in TSO mode. Append 4-byte sentinel desc */
3010 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
3012 /* Workaround for potential 82544 hang in PCI-X.
3013 * Avoid terminating buffers within evenly-aligned
3015 if (unlikely(adapter->pcix_82544 &&
3016 !((unsigned long)(frag->page+offset+size-1) & 4) &&
3020 buffer_info->length = size;
3022 pci_map_page(adapter->pdev,
3027 buffer_info->time_stamp = jiffies;
3028 buffer_info->next_to_watch = i;
3033 if (unlikely(++i == tx_ring->count)) i = 0;
3037 i = (i == 0) ? tx_ring->count - 1 : i - 1;
3038 tx_ring->buffer_info[i].skb = skb;
3039 tx_ring->buffer_info[first].next_to_watch = i;
3044 static void e1000_tx_queue(struct e1000_adapter *adapter,
3045 struct e1000_tx_ring *tx_ring, int tx_flags,
3048 struct e1000_hw *hw = &adapter->hw;
3049 struct e1000_tx_desc *tx_desc = NULL;
3050 struct e1000_buffer *buffer_info;
3051 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3054 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
3055 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3057 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3059 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
3060 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3063 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
3064 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3065 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3068 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
3069 txd_lower |= E1000_TXD_CMD_VLE;
3070 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3073 i = tx_ring->next_to_use;
3076 buffer_info = &tx_ring->buffer_info[i];
3077 tx_desc = E1000_TX_DESC(*tx_ring, i);
3078 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3079 tx_desc->lower.data =
3080 cpu_to_le32(txd_lower | buffer_info->length);
3081 tx_desc->upper.data = cpu_to_le32(txd_upper);
3082 if (unlikely(++i == tx_ring->count)) i = 0;
3085 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3087 /* Force memory writes to complete before letting h/w
3088 * know there are new descriptors to fetch. (Only
3089 * applicable for weak-ordered memory model archs,
3090 * such as IA-64). */
3093 tx_ring->next_to_use = i;
3094 writel(i, hw->hw_addr + tx_ring->tdt);
3095 /* we need this if more than one processor can write to our tail
3096 * at a time, it syncronizes IO on IA64/Altix systems */
3101 * 82547 workaround to avoid controller hang in half-duplex environment.
3102 * The workaround is to avoid queuing a large packet that would span
3103 * the internal Tx FIFO ring boundary by notifying the stack to resend
3104 * the packet at a later time. This gives the Tx FIFO an opportunity to
3105 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3106 * to the beginning of the Tx FIFO.
3109 #define E1000_FIFO_HDR 0x10
3110 #define E1000_82547_PAD_LEN 0x3E0
3112 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3113 struct sk_buff *skb)
3115 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3116 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3118 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3120 if (adapter->link_duplex != HALF_DUPLEX)
3121 goto no_fifo_stall_required;
3123 if (atomic_read(&adapter->tx_fifo_stall))
3126 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3127 atomic_set(&adapter->tx_fifo_stall, 1);
3131 no_fifo_stall_required:
3132 adapter->tx_fifo_head += skb_fifo_len;
3133 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3134 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3138 #define MINIMUM_DHCP_PACKET_SIZE 282
3139 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3140 struct sk_buff *skb)
3142 struct e1000_hw *hw = &adapter->hw;
3144 if (vlan_tx_tag_present(skb)) {
3145 if (!((vlan_tx_tag_get(skb) == hw->mng_cookie.vlan_id) &&
3146 ( hw->mng_cookie.status &
3147 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
3150 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
3151 struct ethhdr *eth = (struct ethhdr *)skb->data;
3152 if ((htons(ETH_P_IP) == eth->h_proto)) {
3153 const struct iphdr *ip =
3154 (struct iphdr *)((u8 *)skb->data+14);
3155 if (IPPROTO_UDP == ip->protocol) {
3156 struct udphdr *udp =
3157 (struct udphdr *)((u8 *)ip +
3159 if (ntohs(udp->dest) == 67) {
3160 offset = (u8 *)udp + 8 - skb->data;
3161 length = skb->len - offset;
3163 return e1000_mng_write_dhcp_info(hw,
3173 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3175 struct e1000_adapter *adapter = netdev_priv(netdev);
3176 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3178 netif_stop_queue(netdev);
3179 /* Herbert's original patch had:
3180 * smp_mb__after_netif_stop_queue();
3181 * but since that doesn't exist yet, just open code it. */
3184 /* We need to check again in a case another CPU has just
3185 * made room available. */
3186 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3190 netif_start_queue(netdev);
3191 ++adapter->restart_queue;
3195 static int e1000_maybe_stop_tx(struct net_device *netdev,
3196 struct e1000_tx_ring *tx_ring, int size)
3198 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3200 return __e1000_maybe_stop_tx(netdev, size);
3203 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3204 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3206 struct e1000_adapter *adapter = netdev_priv(netdev);
3207 struct e1000_hw *hw = &adapter->hw;
3208 struct e1000_tx_ring *tx_ring;
3209 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3210 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3211 unsigned int tx_flags = 0;
3212 unsigned int len = skb->len - skb->data_len;
3213 unsigned long flags;
3214 unsigned int nr_frags;
3220 /* This goes back to the question of how to logically map a tx queue
3221 * to a flow. Right now, performance is impacted slightly negatively
3222 * if using multiple tx queues. If the stack breaks away from a
3223 * single qdisc implementation, we can look at this again. */
3224 tx_ring = adapter->tx_ring;
3226 if (unlikely(skb->len <= 0)) {
3227 dev_kfree_skb_any(skb);
3228 return NETDEV_TX_OK;
3231 /* 82571 and newer doesn't need the workaround that limited descriptor
3233 if (hw->mac_type >= e1000_82571)
3236 mss = skb_shinfo(skb)->gso_size;
3237 /* The controller does a simple calculation to
3238 * make sure there is enough room in the FIFO before
3239 * initiating the DMA for each buffer. The calc is:
3240 * 4 = ceil(buffer len/mss). To make sure we don't
3241 * overrun the FIFO, adjust the max buffer len if mss
3245 max_per_txd = min(mss << 2, max_per_txd);
3246 max_txd_pwr = fls(max_per_txd) - 1;
3248 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3249 * points to just header, pull a few bytes of payload from
3250 * frags into skb->data */
3251 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3252 if (skb->data_len && hdr_len == len) {
3253 switch (hw->mac_type) {
3254 unsigned int pull_size;
3256 /* Make sure we have room to chop off 4 bytes,
3257 * and that the end alignment will work out to
3258 * this hardware's requirements
3259 * NOTE: this is a TSO only workaround
3260 * if end byte alignment not correct move us
3261 * into the next dword */
3262 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3269 pull_size = min((unsigned int)4, skb->data_len);
3270 if (!__pskb_pull_tail(skb, pull_size)) {
3272 "__pskb_pull_tail failed.\n");
3273 dev_kfree_skb_any(skb);
3274 return NETDEV_TX_OK;
3276 len = skb->len - skb->data_len;
3285 /* reserve a descriptor for the offload context */
3286 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3290 /* Controller Erratum workaround */
3291 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3294 count += TXD_USE_COUNT(len, max_txd_pwr);
3296 if (adapter->pcix_82544)
3299 /* work-around for errata 10 and it applies to all controllers
3300 * in PCI-X mode, so add one more descriptor to the count
3302 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3306 nr_frags = skb_shinfo(skb)->nr_frags;
3307 for (f = 0; f < nr_frags; f++)
3308 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3310 if (adapter->pcix_82544)
3314 if (hw->tx_pkt_filtering &&
3315 (hw->mac_type == e1000_82573))
3316 e1000_transfer_dhcp_info(adapter, skb);
3318 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags))
3319 /* Collision - tell upper layer to requeue */
3320 return NETDEV_TX_LOCKED;
3322 /* need: count + 2 desc gap to keep tail from touching
3323 * head, otherwise try next time */
3324 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) {
3325 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3326 return NETDEV_TX_BUSY;
3329 if (unlikely(hw->mac_type == e1000_82547)) {
3330 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3331 netif_stop_queue(netdev);
3332 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
3333 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3334 return NETDEV_TX_BUSY;
3338 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
3339 tx_flags |= E1000_TX_FLAGS_VLAN;
3340 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3343 first = tx_ring->next_to_use;
3345 tso = e1000_tso(adapter, tx_ring, skb);
3347 dev_kfree_skb_any(skb);
3348 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3349 return NETDEV_TX_OK;
3353 tx_ring->last_tx_tso = 1;
3354 tx_flags |= E1000_TX_FLAGS_TSO;
3355 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3356 tx_flags |= E1000_TX_FLAGS_CSUM;
3358 /* Old method was to assume IPv4 packet by default if TSO was enabled.
3359 * 82571 hardware supports TSO capabilities for IPv6 as well...
3360 * no longer assume, we must. */
3361 if (likely(skb->protocol == htons(ETH_P_IP)))
3362 tx_flags |= E1000_TX_FLAGS_IPV4;
3364 e1000_tx_queue(adapter, tx_ring, tx_flags,
3365 e1000_tx_map(adapter, tx_ring, skb, first,
3366 max_per_txd, nr_frags, mss));
3368 netdev->trans_start = jiffies;
3370 /* Make sure there is space in the ring for the next send. */
3371 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3373 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
3374 return NETDEV_TX_OK;
3378 * e1000_tx_timeout - Respond to a Tx Hang
3379 * @netdev: network interface device structure
3382 static void e1000_tx_timeout(struct net_device *netdev)
3384 struct e1000_adapter *adapter = netdev_priv(netdev);
3386 /* Do the reset outside of interrupt context */
3387 adapter->tx_timeout_count++;
3388 schedule_work(&adapter->reset_task);
3391 static void e1000_reset_task(struct work_struct *work)
3393 struct e1000_adapter *adapter =
3394 container_of(work, struct e1000_adapter, reset_task);
3396 e1000_reinit_locked(adapter);
3400 * e1000_get_stats - Get System Network Statistics
3401 * @netdev: network interface device structure
3403 * Returns the address of the device statistics structure.
3404 * The statistics are actually updated from the timer callback.
3407 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3409 struct e1000_adapter *adapter = netdev_priv(netdev);
3411 /* only return the current stats */
3412 return &adapter->net_stats;
3416 * e1000_change_mtu - Change the Maximum Transfer Unit
3417 * @netdev: network interface device structure
3418 * @new_mtu: new value for maximum frame size
3420 * Returns 0 on success, negative on failure
3423 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3425 struct e1000_adapter *adapter = netdev_priv(netdev);
3426 struct e1000_hw *hw = &adapter->hw;
3427 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3428 u16 eeprom_data = 0;
3430 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3431 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3432 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3436 /* Adapter-specific max frame size limits. */
3437 switch (hw->mac_type) {
3438 case e1000_undefined ... e1000_82542_rev2_1:
3440 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3441 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3446 /* Jumbo Frames not supported if:
3447 * - this is not an 82573L device
3448 * - ASPM is enabled in any way (0x1A bits 3:2) */
3449 e1000_read_eeprom(hw, EEPROM_INIT_3GIO_3, 1,
3451 if ((hw->device_id != E1000_DEV_ID_82573L) ||
3452 (eeprom_data & EEPROM_WORD1A_ASPM_MASK)) {
3453 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3455 "Jumbo Frames not supported.\n");
3460 /* ERT will be enabled later to enable wire speed receives */
3462 /* fall through to get support */
3465 case e1000_80003es2lan:
3466 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3467 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3468 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3473 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3477 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3478 * means we reserve 2 more, this pushes us to allocate from the next
3480 * i.e. RXBUFFER_2048 --> size-4096 slab */
3482 if (max_frame <= E1000_RXBUFFER_256)
3483 adapter->rx_buffer_len = E1000_RXBUFFER_256;
3484 else if (max_frame <= E1000_RXBUFFER_512)
3485 adapter->rx_buffer_len = E1000_RXBUFFER_512;
3486 else if (max_frame <= E1000_RXBUFFER_1024)
3487 adapter->rx_buffer_len = E1000_RXBUFFER_1024;
3488 else if (max_frame <= E1000_RXBUFFER_2048)
3489 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3490 else if (max_frame <= E1000_RXBUFFER_4096)
3491 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3492 else if (max_frame <= E1000_RXBUFFER_8192)
3493 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3494 else if (max_frame <= E1000_RXBUFFER_16384)
3495 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3497 /* adjust allocation if LPE protects us, and we aren't using SBP */
3498 if (!hw->tbi_compatibility_on &&
3499 ((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
3500 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3501 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3503 netdev->mtu = new_mtu;
3504 hw->max_frame_size = max_frame;
3506 if (netif_running(netdev))
3507 e1000_reinit_locked(adapter);
3513 * e1000_update_stats - Update the board statistics counters
3514 * @adapter: board private structure
3517 void e1000_update_stats(struct e1000_adapter *adapter)
3519 struct e1000_hw *hw = &adapter->hw;
3520 struct pci_dev *pdev = adapter->pdev;
3521 unsigned long flags;
3524 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3527 * Prevent stats update while adapter is being reset, or if the pci
3528 * connection is down.
3530 if (adapter->link_speed == 0)
3532 if (pci_channel_offline(pdev))
3535 spin_lock_irqsave(&adapter->stats_lock, flags);
3537 /* these counters are modified from e1000_tbi_adjust_stats,
3538 * called from the interrupt context, so they must only
3539 * be written while holding adapter->stats_lock
3542 adapter->stats.crcerrs += er32(CRCERRS);
3543 adapter->stats.gprc += er32(GPRC);
3544 adapter->stats.gorcl += er32(GORCL);
3545 adapter->stats.gorch += er32(GORCH);
3546 adapter->stats.bprc += er32(BPRC);
3547 adapter->stats.mprc += er32(MPRC);
3548 adapter->stats.roc += er32(ROC);
3550 if (hw->mac_type != e1000_ich8lan) {
3551 adapter->stats.prc64 += er32(PRC64);
3552 adapter->stats.prc127 += er32(PRC127);
3553 adapter->stats.prc255 += er32(PRC255);
3554 adapter->stats.prc511 += er32(PRC511);
3555 adapter->stats.prc1023 += er32(PRC1023);
3556 adapter->stats.prc1522 += er32(PRC1522);
3559 adapter->stats.symerrs += er32(SYMERRS);
3560 adapter->stats.mpc += er32(MPC);
3561 adapter->stats.scc += er32(SCC);
3562 adapter->stats.ecol += er32(ECOL);
3563 adapter->stats.mcc += er32(MCC);
3564 adapter->stats.latecol += er32(LATECOL);
3565 adapter->stats.dc += er32(DC);
3566 adapter->stats.sec += er32(SEC);
3567 adapter->stats.rlec += er32(RLEC);
3568 adapter->stats.xonrxc += er32(XONRXC);
3569 adapter->stats.xontxc += er32(XONTXC);
3570 adapter->stats.xoffrxc += er32(XOFFRXC);
3571 adapter->stats.xofftxc += er32(XOFFTXC);
3572 adapter->stats.fcruc += er32(FCRUC);
3573 adapter->stats.gptc += er32(GPTC);
3574 adapter->stats.gotcl += er32(GOTCL);
3575 adapter->stats.gotch += er32(GOTCH);
3576 adapter->stats.rnbc += er32(RNBC);
3577 adapter->stats.ruc += er32(RUC);
3578 adapter->stats.rfc += er32(RFC);
3579 adapter->stats.rjc += er32(RJC);
3580 adapter->stats.torl += er32(TORL);
3581 adapter->stats.torh += er32(TORH);
3582 adapter->stats.totl += er32(TOTL);
3583 adapter->stats.toth += er32(TOTH);
3584 adapter->stats.tpr += er32(TPR);
3586 if (hw->mac_type != e1000_ich8lan) {
3587 adapter->stats.ptc64 += er32(PTC64);
3588 adapter->stats.ptc127 += er32(PTC127);
3589 adapter->stats.ptc255 += er32(PTC255);
3590 adapter->stats.ptc511 += er32(PTC511);
3591 adapter->stats.ptc1023 += er32(PTC1023);
3592 adapter->stats.ptc1522 += er32(PTC1522);
3595 adapter->stats.mptc += er32(MPTC);
3596 adapter->stats.bptc += er32(BPTC);
3598 /* used for adaptive IFS */
3600 hw->tx_packet_delta = er32(TPT);
3601 adapter->stats.tpt += hw->tx_packet_delta;
3602 hw->collision_delta = er32(COLC);
3603 adapter->stats.colc += hw->collision_delta;
3605 if (hw->mac_type >= e1000_82543) {
3606 adapter->stats.algnerrc += er32(ALGNERRC);
3607 adapter->stats.rxerrc += er32(RXERRC);
3608 adapter->stats.tncrs += er32(TNCRS);
3609 adapter->stats.cexterr += er32(CEXTERR);
3610 adapter->stats.tsctc += er32(TSCTC);
3611 adapter->stats.tsctfc += er32(TSCTFC);
3613 if (hw->mac_type > e1000_82547_rev_2) {
3614 adapter->stats.iac += er32(IAC);
3615 adapter->stats.icrxoc += er32(ICRXOC);
3617 if (hw->mac_type != e1000_ich8lan) {
3618 adapter->stats.icrxptc += er32(ICRXPTC);
3619 adapter->stats.icrxatc += er32(ICRXATC);
3620 adapter->stats.ictxptc += er32(ICTXPTC);
3621 adapter->stats.ictxatc += er32(ICTXATC);
3622 adapter->stats.ictxqec += er32(ICTXQEC);
3623 adapter->stats.ictxqmtc += er32(ICTXQMTC);
3624 adapter->stats.icrxdmtc += er32(ICRXDMTC);
3628 /* Fill out the OS statistics structure */
3629 adapter->net_stats.multicast = adapter->stats.mprc;
3630 adapter->net_stats.collisions = adapter->stats.colc;
3634 /* RLEC on some newer hardware can be incorrect so build
3635 * our own version based on RUC and ROC */
3636 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3637 adapter->stats.crcerrs + adapter->stats.algnerrc +
3638 adapter->stats.ruc + adapter->stats.roc +
3639 adapter->stats.cexterr;
3640 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3641 adapter->net_stats.rx_length_errors = adapter->stats.rlerrc;
3642 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3643 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3644 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3647 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3648 adapter->net_stats.tx_errors = adapter->stats.txerrc;
3649 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3650 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3651 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3652 if (hw->bad_tx_carr_stats_fd &&
3653 adapter->link_duplex == FULL_DUPLEX) {
3654 adapter->net_stats.tx_carrier_errors = 0;
3655 adapter->stats.tncrs = 0;
3658 /* Tx Dropped needs to be maintained elsewhere */
3661 if (hw->media_type == e1000_media_type_copper) {
3662 if ((adapter->link_speed == SPEED_1000) &&
3663 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3664 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3665 adapter->phy_stats.idle_errors += phy_tmp;
3668 if ((hw->mac_type <= e1000_82546) &&
3669 (hw->phy_type == e1000_phy_m88) &&
3670 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3671 adapter->phy_stats.receive_errors += phy_tmp;
3674 /* Management Stats */
3675 if (hw->has_smbus) {
3676 adapter->stats.mgptc += er32(MGTPTC);
3677 adapter->stats.mgprc += er32(MGTPRC);
3678 adapter->stats.mgpdc += er32(MGTPDC);
3681 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3685 * e1000_intr_msi - Interrupt Handler
3686 * @irq: interrupt number
3687 * @data: pointer to a network interface device structure
3690 static irqreturn_t e1000_intr_msi(int irq, void *data)
3692 struct net_device *netdev = data;
3693 struct e1000_adapter *adapter = netdev_priv(netdev);
3694 struct e1000_hw *hw = &adapter->hw;
3695 u32 icr = er32(ICR);
3697 /* in NAPI mode read ICR disables interrupts using IAM */
3699 if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
3700 hw->get_link_status = 1;
3701 /* 80003ES2LAN workaround-- For packet buffer work-around on
3702 * link down event; disable receives here in the ISR and reset
3703 * adapter in watchdog */
3704 if (netif_carrier_ok(netdev) &&
3705 (hw->mac_type == e1000_80003es2lan)) {
3706 /* disable receives */
3707 u32 rctl = er32(RCTL);
3708 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3710 /* guard against interrupt when we're going down */
3711 if (!test_bit(__E1000_DOWN, &adapter->flags))
3712 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3715 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3716 adapter->total_tx_bytes = 0;
3717 adapter->total_tx_packets = 0;
3718 adapter->total_rx_bytes = 0;
3719 adapter->total_rx_packets = 0;
3720 __netif_rx_schedule(netdev, &adapter->napi);
3722 e1000_irq_enable(adapter);
3728 * e1000_intr - Interrupt Handler
3729 * @irq: interrupt number
3730 * @data: pointer to a network interface device structure
3733 static irqreturn_t e1000_intr(int irq, void *data)
3735 struct net_device *netdev = data;
3736 struct e1000_adapter *adapter = netdev_priv(netdev);
3737 struct e1000_hw *hw = &adapter->hw;
3738 u32 rctl, icr = er32(ICR);
3741 return IRQ_NONE; /* Not our interrupt */
3743 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
3744 * not set, then the adapter didn't send an interrupt */
3745 if (unlikely(hw->mac_type >= e1000_82571 &&
3746 !(icr & E1000_ICR_INT_ASSERTED)))
3749 /* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
3750 * need for the IMC write */
3752 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3753 hw->get_link_status = 1;
3754 /* 80003ES2LAN workaround--
3755 * For packet buffer work-around on link down event;
3756 * disable receives here in the ISR and
3757 * reset adapter in watchdog
3759 if (netif_carrier_ok(netdev) &&
3760 (hw->mac_type == e1000_80003es2lan)) {
3761 /* disable receives */
3763 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3765 /* guard against interrupt when we're going down */
3766 if (!test_bit(__E1000_DOWN, &adapter->flags))
3767 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3770 if (unlikely(hw->mac_type < e1000_82571)) {
3771 /* disable interrupts, without the synchronize_irq bit */
3773 E1000_WRITE_FLUSH();
3775 if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
3776 adapter->total_tx_bytes = 0;
3777 adapter->total_tx_packets = 0;
3778 adapter->total_rx_bytes = 0;
3779 adapter->total_rx_packets = 0;
3780 __netif_rx_schedule(netdev, &adapter->napi);
3782 /* this really should not happen! if it does it is basically a
3783 * bug, but not a hard error, so enable ints and continue */
3784 e1000_irq_enable(adapter);
3790 * e1000_clean - NAPI Rx polling callback
3791 * @adapter: board private structure
3793 static int e1000_clean(struct napi_struct *napi, int budget)
3795 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3796 struct net_device *poll_dev = adapter->netdev;
3797 int tx_cleaned = 0, work_done = 0;
3799 adapter = netdev_priv(poll_dev);
3801 /* e1000_clean is called per-cpu. This lock protects
3802 * tx_ring[0] from being cleaned by multiple cpus
3803 * simultaneously. A failure obtaining the lock means
3804 * tx_ring[0] is currently being cleaned anyway. */
3805 if (spin_trylock(&adapter->tx_queue_lock)) {
3806 tx_cleaned = e1000_clean_tx_irq(adapter,
3807 &adapter->tx_ring[0]);
3808 spin_unlock(&adapter->tx_queue_lock);
3811 adapter->clean_rx(adapter, &adapter->rx_ring[0],
3812 &work_done, budget);
3817 /* If budget not fully consumed, exit the polling mode */
3818 if (work_done < budget) {
3819 if (likely(adapter->itr_setting & 3))
3820 e1000_set_itr(adapter);
3821 netif_rx_complete(poll_dev, napi);
3822 e1000_irq_enable(adapter);
3829 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3830 * @adapter: board private structure
3832 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3833 struct e1000_tx_ring *tx_ring)
3835 struct e1000_hw *hw = &adapter->hw;
3836 struct net_device *netdev = adapter->netdev;
3837 struct e1000_tx_desc *tx_desc, *eop_desc;
3838 struct e1000_buffer *buffer_info;
3839 unsigned int i, eop;
3840 unsigned int count = 0;
3841 bool cleaned = false;
3842 unsigned int total_tx_bytes=0, total_tx_packets=0;
3844 i = tx_ring->next_to_clean;
3845 eop = tx_ring->buffer_info[i].next_to_watch;
3846 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3848 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3849 for (cleaned = false; !cleaned; ) {
3850 tx_desc = E1000_TX_DESC(*tx_ring, i);
3851 buffer_info = &tx_ring->buffer_info[i];
3852 cleaned = (i == eop);
3855 struct sk_buff *skb = buffer_info->skb;
3856 unsigned int segs, bytecount;
3857 segs = skb_shinfo(skb)->gso_segs ?: 1;
3858 /* multiply data chunks by size of headers */
3859 bytecount = ((segs - 1) * skb_headlen(skb)) +
3861 total_tx_packets += segs;
3862 total_tx_bytes += bytecount;
3864 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3865 tx_desc->upper.data = 0;
3867 if (unlikely(++i == tx_ring->count)) i = 0;
3870 eop = tx_ring->buffer_info[i].next_to_watch;
3871 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3872 #define E1000_TX_WEIGHT 64
3873 /* weight of a sort for tx, to avoid endless transmit cleanup */
3874 if (count++ == E1000_TX_WEIGHT)
3878 tx_ring->next_to_clean = i;
3880 #define TX_WAKE_THRESHOLD 32
3881 if (unlikely(cleaned && netif_carrier_ok(netdev) &&
3882 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3883 /* Make sure that anybody stopping the queue after this
3884 * sees the new next_to_clean.
3887 if (netif_queue_stopped(netdev)) {
3888 netif_wake_queue(netdev);
3889 ++adapter->restart_queue;
3893 if (adapter->detect_tx_hung) {
3894 /* Detect a transmit hang in hardware, this serializes the
3895 * check with the clearing of time_stamp and movement of i */
3896 adapter->detect_tx_hung = false;
3897 if (tx_ring->buffer_info[eop].dma &&
3898 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3899 (adapter->tx_timeout_factor * HZ))
3900 && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3902 /* detected Tx unit hang */
3903 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3907 " next_to_use <%x>\n"
3908 " next_to_clean <%x>\n"
3909 "buffer_info[next_to_clean]\n"
3910 " time_stamp <%lx>\n"
3911 " next_to_watch <%x>\n"
3913 " next_to_watch.status <%x>\n",
3914 (unsigned long)((tx_ring - adapter->tx_ring) /
3915 sizeof(struct e1000_tx_ring)),
3916 readl(hw->hw_addr + tx_ring->tdh),
3917 readl(hw->hw_addr + tx_ring->tdt),
3918 tx_ring->next_to_use,
3919 tx_ring->next_to_clean,
3920 tx_ring->buffer_info[eop].time_stamp,
3923 eop_desc->upper.fields.status);
3924 netif_stop_queue(netdev);
3927 adapter->total_tx_bytes += total_tx_bytes;
3928 adapter->total_tx_packets += total_tx_packets;
3929 adapter->net_stats.tx_bytes += total_tx_bytes;
3930 adapter->net_stats.tx_packets += total_tx_packets;
3935 * e1000_rx_checksum - Receive Checksum Offload for 82543
3936 * @adapter: board private structure
3937 * @status_err: receive descriptor status and error fields
3938 * @csum: receive descriptor csum field
3939 * @sk_buff: socket buffer with received data
3942 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3943 u32 csum, struct sk_buff *skb)
3945 struct e1000_hw *hw = &adapter->hw;
3946 u16 status = (u16)status_err;
3947 u8 errors = (u8)(status_err >> 24);
3948 skb->ip_summed = CHECKSUM_NONE;
3950 /* 82543 or newer only */
3951 if (unlikely(hw->mac_type < e1000_82543)) return;
3952 /* Ignore Checksum bit is set */
3953 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3954 /* TCP/UDP checksum error bit is set */
3955 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3956 /* let the stack verify checksum errors */
3957 adapter->hw_csum_err++;
3960 /* TCP/UDP Checksum has not been calculated */
3961 if (hw->mac_type <= e1000_82547_rev_2) {
3962 if (!(status & E1000_RXD_STAT_TCPCS))
3965 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3968 /* It must be a TCP or UDP packet with a valid checksum */
3969 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3970 /* TCP checksum is good */
3971 skb->ip_summed = CHECKSUM_UNNECESSARY;
3972 } else if (hw->mac_type > e1000_82547_rev_2) {
3973 /* IP fragment with UDP payload */
3974 /* Hardware complements the payload checksum, so we undo it
3975 * and then put the value in host order for further stack use.
3977 __sum16 sum = (__force __sum16)htons(csum);
3978 skb->csum = csum_unfold(~sum);
3979 skb->ip_summed = CHECKSUM_COMPLETE;
3981 adapter->hw_csum_good++;
3985 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3986 * @adapter: board private structure
3988 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3989 struct e1000_rx_ring *rx_ring,
3990 int *work_done, int work_to_do)
3992 struct e1000_hw *hw = &adapter->hw;
3993 struct net_device *netdev = adapter->netdev;
3994 struct pci_dev *pdev = adapter->pdev;
3995 struct e1000_rx_desc *rx_desc, *next_rxd;
3996 struct e1000_buffer *buffer_info, *next_buffer;
3997 unsigned long flags;
4001 int cleaned_count = 0;
4002 bool cleaned = false;
4003 unsigned int total_rx_bytes=0, total_rx_packets=0;
4005 i = rx_ring->next_to_clean;
4006 rx_desc = E1000_RX_DESC(*rx_ring, i);
4007 buffer_info = &rx_ring->buffer_info[i];
4009 while (rx_desc->status & E1000_RXD_STAT_DD) {
4010 struct sk_buff *skb;
4013 if (*work_done >= work_to_do)
4017 status = rx_desc->status;
4018 skb = buffer_info->skb;
4019 buffer_info->skb = NULL;
4021 prefetch(skb->data - NET_IP_ALIGN);
4023 if (++i == rx_ring->count) i = 0;
4024 next_rxd = E1000_RX_DESC(*rx_ring, i);
4027 next_buffer = &rx_ring->buffer_info[i];
4031 pci_unmap_single(pdev,
4033 buffer_info->length,
4034 PCI_DMA_FROMDEVICE);
4036 length = le16_to_cpu(rx_desc->length);
4038 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
4039 /* All receives must fit into a single buffer */
4040 E1000_DBG("%s: Receive packet consumed multiple"
4041 " buffers\n", netdev->name);
4043 buffer_info->skb = skb;
4047 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4048 last_byte = *(skb->data + length - 1);
4049 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4051 spin_lock_irqsave(&adapter->stats_lock, flags);
4052 e1000_tbi_adjust_stats(hw, &adapter->stats,
4054 spin_unlock_irqrestore(&adapter->stats_lock,
4059 buffer_info->skb = skb;
4064 /* adjust length to remove Ethernet CRC, this must be
4065 * done after the TBI_ACCEPT workaround above */
4068 /* probably a little skewed due to removing CRC */
4069 total_rx_bytes += length;
4072 /* code added for copybreak, this should improve
4073 * performance for small packets with large amounts
4074 * of reassembly being done in the stack */
4075 if (length < copybreak) {
4076 struct sk_buff *new_skb =
4077 netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
4079 skb_reserve(new_skb, NET_IP_ALIGN);
4080 skb_copy_to_linear_data_offset(new_skb,
4086 /* save the skb in buffer_info as good */
4087 buffer_info->skb = skb;
4090 /* else just continue with the old one */
4092 /* end copybreak code */
4093 skb_put(skb, length);
4095 /* Receive Checksum Offload */
4096 e1000_rx_checksum(adapter,
4098 ((u32)(rx_desc->errors) << 24),
4099 le16_to_cpu(rx_desc->csum), skb);
4101 skb->protocol = eth_type_trans(skb, netdev);
4103 if (unlikely(adapter->vlgrp &&
4104 (status & E1000_RXD_STAT_VP))) {
4105 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
4106 le16_to_cpu(rx_desc->special));
4108 netif_receive_skb(skb);
4112 rx_desc->status = 0;
4114 /* return some buffers to hardware, one at a time is too slow */
4115 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4116 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4120 /* use prefetched values */
4122 buffer_info = next_buffer;
4124 rx_ring->next_to_clean = i;
4126 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4128 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4130 adapter->total_rx_packets += total_rx_packets;
4131 adapter->total_rx_bytes += total_rx_bytes;
4132 adapter->net_stats.rx_bytes += total_rx_bytes;
4133 adapter->net_stats.rx_packets += total_rx_packets;
4138 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4139 * @adapter: address of board private structure
4142 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4143 struct e1000_rx_ring *rx_ring,
4146 struct e1000_hw *hw = &adapter->hw;
4147 struct net_device *netdev = adapter->netdev;
4148 struct pci_dev *pdev = adapter->pdev;
4149 struct e1000_rx_desc *rx_desc;
4150 struct e1000_buffer *buffer_info;
4151 struct sk_buff *skb;
4153 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
4155 i = rx_ring->next_to_use;
4156 buffer_info = &rx_ring->buffer_info[i];
4158 while (cleaned_count--) {
4159 skb = buffer_info->skb;
4165 skb = netdev_alloc_skb(netdev, bufsz);
4166 if (unlikely(!skb)) {
4167 /* Better luck next round */
4168 adapter->alloc_rx_buff_failed++;
4172 /* Fix for errata 23, can't cross 64kB boundary */
4173 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4174 struct sk_buff *oldskb = skb;
4175 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
4176 "at %p\n", bufsz, skb->data);
4177 /* Try again, without freeing the previous */
4178 skb = netdev_alloc_skb(netdev, bufsz);
4179 /* Failed allocation, critical failure */
4181 dev_kfree_skb(oldskb);
4185 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4188 dev_kfree_skb(oldskb);
4189 break; /* while !buffer_info->skb */
4192 /* Use new allocation */
4193 dev_kfree_skb(oldskb);
4195 /* Make buffer alignment 2 beyond a 16 byte boundary
4196 * this will result in a 16 byte aligned IP header after
4197 * the 14 byte MAC header is removed
4199 skb_reserve(skb, NET_IP_ALIGN);
4201 buffer_info->skb = skb;
4202 buffer_info->length = adapter->rx_buffer_len;
4204 buffer_info->dma = pci_map_single(pdev,
4206 adapter->rx_buffer_len,
4207 PCI_DMA_FROMDEVICE);
4209 /* Fix for errata 23, can't cross 64kB boundary */
4210 if (!e1000_check_64k_bound(adapter,
4211 (void *)(unsigned long)buffer_info->dma,
4212 adapter->rx_buffer_len)) {
4213 DPRINTK(RX_ERR, ERR,
4214 "dma align check failed: %u bytes at %p\n",
4215 adapter->rx_buffer_len,
4216 (void *)(unsigned long)buffer_info->dma);
4218 buffer_info->skb = NULL;
4220 pci_unmap_single(pdev, buffer_info->dma,
4221 adapter->rx_buffer_len,
4222 PCI_DMA_FROMDEVICE);
4224 break; /* while !buffer_info->skb */
4226 rx_desc = E1000_RX_DESC(*rx_ring, i);
4227 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4229 if (unlikely(++i == rx_ring->count))
4231 buffer_info = &rx_ring->buffer_info[i];
4234 if (likely(rx_ring->next_to_use != i)) {
4235 rx_ring->next_to_use = i;
4236 if (unlikely(i-- == 0))
4237 i = (rx_ring->count - 1);
4239 /* Force memory writes to complete before letting h/w
4240 * know there are new descriptors to fetch. (Only
4241 * applicable for weak-ordered memory model archs,
4242 * such as IA-64). */
4244 writel(i, hw->hw_addr + rx_ring->rdt);
4249 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4253 static void e1000_smartspeed(struct e1000_adapter *adapter)
4255 struct e1000_hw *hw = &adapter->hw;
4259 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4260 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4263 if (adapter->smartspeed == 0) {
4264 /* If Master/Slave config fault is asserted twice,
4265 * we assume back-to-back */
4266 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4267 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4268 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4269 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4270 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4271 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4272 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4273 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4275 adapter->smartspeed++;
4276 if (!e1000_phy_setup_autoneg(hw) &&
4277 !e1000_read_phy_reg(hw, PHY_CTRL,
4279 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4280 MII_CR_RESTART_AUTO_NEG);
4281 e1000_write_phy_reg(hw, PHY_CTRL,
4286 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4287 /* If still no link, perhaps using 2/3 pair cable */
4288 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4289 phy_ctrl |= CR_1000T_MS_ENABLE;
4290 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4291 if (!e1000_phy_setup_autoneg(hw) &&
4292 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4293 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4294 MII_CR_RESTART_AUTO_NEG);
4295 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4298 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4299 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4300 adapter->smartspeed = 0;
4310 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4316 return e1000_mii_ioctl(netdev, ifr, cmd);
4329 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4332 struct e1000_adapter *adapter = netdev_priv(netdev);
4333 struct e1000_hw *hw = &adapter->hw;
4334 struct mii_ioctl_data *data = if_mii(ifr);
4338 unsigned long flags;
4340 if (hw->media_type != e1000_media_type_copper)
4345 data->phy_id = hw->phy_addr;
4348 if (!capable(CAP_NET_ADMIN))
4350 spin_lock_irqsave(&adapter->stats_lock, flags);
4351 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4353 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4356 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4359 if (!capable(CAP_NET_ADMIN))
4361 if (data->reg_num & ~(0x1F))
4363 mii_reg = data->val_in;
4364 spin_lock_irqsave(&adapter->stats_lock, flags);
4365 if (e1000_write_phy_reg(hw, data->reg_num,
4367 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4370 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4371 if (hw->media_type == e1000_media_type_copper) {
4372 switch (data->reg_num) {
4374 if (mii_reg & MII_CR_POWER_DOWN)
4376 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4378 hw->autoneg_advertised = 0x2F;
4381 spddplx = SPEED_1000;
4382 else if (mii_reg & 0x2000)
4383 spddplx = SPEED_100;
4386 spddplx += (mii_reg & 0x100)
4389 retval = e1000_set_spd_dplx(adapter,
4394 if (netif_running(adapter->netdev))
4395 e1000_reinit_locked(adapter);
4397 e1000_reset(adapter);
4399 case M88E1000_PHY_SPEC_CTRL:
4400 case M88E1000_EXT_PHY_SPEC_CTRL:
4401 if (e1000_phy_reset(hw))
4406 switch (data->reg_num) {
4408 if (mii_reg & MII_CR_POWER_DOWN)
4410 if (netif_running(adapter->netdev))
4411 e1000_reinit_locked(adapter);
4413 e1000_reset(adapter);
4421 return E1000_SUCCESS;
4424 void e1000_pci_set_mwi(struct e1000_hw *hw)
4426 struct e1000_adapter *adapter = hw->back;
4427 int ret_val = pci_set_mwi(adapter->pdev);
4430 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4433 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4435 struct e1000_adapter *adapter = hw->back;
4437 pci_clear_mwi(adapter->pdev);
4440 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4442 struct e1000_adapter *adapter = hw->back;
4443 return pcix_get_mmrbc(adapter->pdev);
4446 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4448 struct e1000_adapter *adapter = hw->back;
4449 pcix_set_mmrbc(adapter->pdev, mmrbc);
4452 s32 e1000_read_pcie_cap_reg(struct e1000_hw *hw, u32 reg, u16 *value)
4454 struct e1000_adapter *adapter = hw->back;
4457 cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
4459 return -E1000_ERR_CONFIG;
4461 pci_read_config_word(adapter->pdev, cap_offset + reg, value);
4463 return E1000_SUCCESS;
4466 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4471 static void e1000_vlan_rx_register(struct net_device *netdev,
4472 struct vlan_group *grp)
4474 struct e1000_adapter *adapter = netdev_priv(netdev);
4475 struct e1000_hw *hw = &adapter->hw;
4478 if (!test_bit(__E1000_DOWN, &adapter->flags))
4479 e1000_irq_disable(adapter);
4480 adapter->vlgrp = grp;
4483 /* enable VLAN tag insert/strip */
4485 ctrl |= E1000_CTRL_VME;
4488 if (adapter->hw.mac_type != e1000_ich8lan) {
4489 /* enable VLAN receive filtering */
4491 rctl &= ~E1000_RCTL_CFIEN;
4493 e1000_update_mng_vlan(adapter);
4496 /* disable VLAN tag insert/strip */
4498 ctrl &= ~E1000_CTRL_VME;
4501 if (adapter->hw.mac_type != e1000_ich8lan) {
4502 if (adapter->mng_vlan_id !=
4503 (u16)E1000_MNG_VLAN_NONE) {
4504 e1000_vlan_rx_kill_vid(netdev,
4505 adapter->mng_vlan_id);
4506 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4511 if (!test_bit(__E1000_DOWN, &adapter->flags))
4512 e1000_irq_enable(adapter);
4515 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4517 struct e1000_adapter *adapter = netdev_priv(netdev);
4518 struct e1000_hw *hw = &adapter->hw;
4521 if ((hw->mng_cookie.status &
4522 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4523 (vid == adapter->mng_vlan_id))
4525 /* add VID to filter table */
4526 index = (vid >> 5) & 0x7F;
4527 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4528 vfta |= (1 << (vid & 0x1F));
4529 e1000_write_vfta(hw, index, vfta);
4532 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4534 struct e1000_adapter *adapter = netdev_priv(netdev);
4535 struct e1000_hw *hw = &adapter->hw;
4538 if (!test_bit(__E1000_DOWN, &adapter->flags))
4539 e1000_irq_disable(adapter);
4540 vlan_group_set_device(adapter->vlgrp, vid, NULL);
4541 if (!test_bit(__E1000_DOWN, &adapter->flags))
4542 e1000_irq_enable(adapter);
4544 if ((hw->mng_cookie.status &
4545 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4546 (vid == adapter->mng_vlan_id)) {
4547 /* release control to f/w */
4548 e1000_release_hw_control(adapter);
4552 /* remove VID from filter table */
4553 index = (vid >> 5) & 0x7F;
4554 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4555 vfta &= ~(1 << (vid & 0x1F));
4556 e1000_write_vfta(hw, index, vfta);
4559 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4561 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4563 if (adapter->vlgrp) {
4565 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4566 if (!vlan_group_get_device(adapter->vlgrp, vid))
4568 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4573 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx)
4575 struct e1000_hw *hw = &adapter->hw;
4579 /* Fiber NICs only allow 1000 gbps Full duplex */
4580 if ((hw->media_type == e1000_media_type_fiber) &&
4581 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4582 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4587 case SPEED_10 + DUPLEX_HALF:
4588 hw->forced_speed_duplex = e1000_10_half;
4590 case SPEED_10 + DUPLEX_FULL:
4591 hw->forced_speed_duplex = e1000_10_full;
4593 case SPEED_100 + DUPLEX_HALF:
4594 hw->forced_speed_duplex = e1000_100_half;
4596 case SPEED_100 + DUPLEX_FULL:
4597 hw->forced_speed_duplex = e1000_100_full;
4599 case SPEED_1000 + DUPLEX_FULL:
4601 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4603 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4605 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4611 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4613 struct net_device *netdev = pci_get_drvdata(pdev);
4614 struct e1000_adapter *adapter = netdev_priv(netdev);
4615 struct e1000_hw *hw = &adapter->hw;
4616 u32 ctrl, ctrl_ext, rctl, status;
4617 u32 wufc = adapter->wol;
4622 netif_device_detach(netdev);
4624 if (netif_running(netdev)) {
4625 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4626 e1000_down(adapter);
4630 retval = pci_save_state(pdev);
4635 status = er32(STATUS);
4636 if (status & E1000_STATUS_LU)
4637 wufc &= ~E1000_WUFC_LNKC;
4640 e1000_setup_rctl(adapter);
4641 e1000_set_rx_mode(netdev);
4643 /* turn on all-multi mode if wake on multicast is enabled */
4644 if (wufc & E1000_WUFC_MC) {
4646 rctl |= E1000_RCTL_MPE;
4650 if (hw->mac_type >= e1000_82540) {
4652 /* advertise wake from D3Cold */
4653 #define E1000_CTRL_ADVD3WUC 0x00100000
4654 /* phy power management enable */
4655 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4656 ctrl |= E1000_CTRL_ADVD3WUC |
4657 E1000_CTRL_EN_PHY_PWR_MGMT;
4661 if (hw->media_type == e1000_media_type_fiber ||
4662 hw->media_type == e1000_media_type_internal_serdes) {
4663 /* keep the laser running in D3 */
4664 ctrl_ext = er32(CTRL_EXT);
4665 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4666 ew32(CTRL_EXT, ctrl_ext);
4669 /* Allow time for pending master requests to run */
4670 e1000_disable_pciex_master(hw);
4672 ew32(WUC, E1000_WUC_PME_EN);
4674 pci_enable_wake(pdev, PCI_D3hot, 1);
4675 pci_enable_wake(pdev, PCI_D3cold, 1);
4679 pci_enable_wake(pdev, PCI_D3hot, 0);
4680 pci_enable_wake(pdev, PCI_D3cold, 0);
4683 e1000_release_manageability(adapter);
4685 /* make sure adapter isn't asleep if manageability is enabled */
4686 if (adapter->en_mng_pt) {
4687 pci_enable_wake(pdev, PCI_D3hot, 1);
4688 pci_enable_wake(pdev, PCI_D3cold, 1);
4691 if (hw->phy_type == e1000_phy_igp_3)
4692 e1000_phy_powerdown_workaround(hw);
4694 if (netif_running(netdev))
4695 e1000_free_irq(adapter);
4697 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4698 * would have already happened in close and is redundant. */
4699 e1000_release_hw_control(adapter);
4701 pci_disable_device(pdev);
4703 pci_set_power_state(pdev, pci_choose_state(pdev, state));
4709 static int e1000_resume(struct pci_dev *pdev)
4711 struct net_device *netdev = pci_get_drvdata(pdev);
4712 struct e1000_adapter *adapter = netdev_priv(netdev);
4713 struct e1000_hw *hw = &adapter->hw;
4716 pci_set_power_state(pdev, PCI_D0);
4717 pci_restore_state(pdev);
4719 if (adapter->need_ioport)
4720 err = pci_enable_device(pdev);
4722 err = pci_enable_device_mem(pdev);
4724 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
4727 pci_set_master(pdev);
4729 pci_enable_wake(pdev, PCI_D3hot, 0);
4730 pci_enable_wake(pdev, PCI_D3cold, 0);
4732 if (netif_running(netdev)) {
4733 err = e1000_request_irq(adapter);
4738 e1000_power_up_phy(adapter);
4739 e1000_reset(adapter);
4742 e1000_init_manageability(adapter);
4744 if (netif_running(netdev))
4747 netif_device_attach(netdev);
4749 /* If the controller is 82573 and f/w is AMT, do not set
4750 * DRV_LOAD until the interface is up. For all other cases,
4751 * let the f/w know that the h/w is now under the control
4753 if (hw->mac_type != e1000_82573 ||
4754 !e1000_check_mng_mode(hw))
4755 e1000_get_hw_control(adapter);
4761 static void e1000_shutdown(struct pci_dev *pdev)
4763 e1000_suspend(pdev, PMSG_SUSPEND);
4766 #ifdef CONFIG_NET_POLL_CONTROLLER
4768 * Polling 'interrupt' - used by things like netconsole to send skbs
4769 * without having to re-enable interrupts. It's not called while
4770 * the interrupt routine is executing.
4772 static void e1000_netpoll(struct net_device *netdev)
4774 struct e1000_adapter *adapter = netdev_priv(netdev);
4776 disable_irq(adapter->pdev->irq);
4777 e1000_intr(adapter->pdev->irq, netdev);
4778 enable_irq(adapter->pdev->irq);
4783 * e1000_io_error_detected - called when PCI error is detected
4784 * @pdev: Pointer to PCI device
4785 * @state: The current pci conneection state
4787 * This function is called after a PCI bus error affecting
4788 * this device has been detected.
4790 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4791 pci_channel_state_t state)
4793 struct net_device *netdev = pci_get_drvdata(pdev);
4794 struct e1000_adapter *adapter = netdev_priv(netdev);
4796 netif_device_detach(netdev);
4798 if (netif_running(netdev))
4799 e1000_down(adapter);
4800 pci_disable_device(pdev);
4802 /* Request a slot slot reset. */
4803 return PCI_ERS_RESULT_NEED_RESET;
4807 * e1000_io_slot_reset - called after the pci bus has been reset.
4808 * @pdev: Pointer to PCI device
4810 * Restart the card from scratch, as if from a cold-boot. Implementation
4811 * resembles the first-half of the e1000_resume routine.
4813 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4815 struct net_device *netdev = pci_get_drvdata(pdev);
4816 struct e1000_adapter *adapter = netdev_priv(netdev);
4817 struct e1000_hw *hw = &adapter->hw;
4820 if (adapter->need_ioport)
4821 err = pci_enable_device(pdev);
4823 err = pci_enable_device_mem(pdev);
4825 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
4826 return PCI_ERS_RESULT_DISCONNECT;
4828 pci_set_master(pdev);
4830 pci_enable_wake(pdev, PCI_D3hot, 0);
4831 pci_enable_wake(pdev, PCI_D3cold, 0);
4833 e1000_reset(adapter);
4836 return PCI_ERS_RESULT_RECOVERED;
4840 * e1000_io_resume - called when traffic can start flowing again.
4841 * @pdev: Pointer to PCI device
4843 * This callback is called when the error recovery driver tells us that
4844 * its OK to resume normal operation. Implementation resembles the
4845 * second-half of the e1000_resume routine.
4847 static void e1000_io_resume(struct pci_dev *pdev)
4849 struct net_device *netdev = pci_get_drvdata(pdev);
4850 struct e1000_adapter *adapter = netdev_priv(netdev);
4851 struct e1000_hw *hw = &adapter->hw;
4853 e1000_init_manageability(adapter);
4855 if (netif_running(netdev)) {
4856 if (e1000_up(adapter)) {
4857 printk("e1000: can't bring device back up after reset\n");
4862 netif_device_attach(netdev);
4864 /* If the controller is 82573 and f/w is AMT, do not set
4865 * DRV_LOAD until the interface is up. For all other cases,
4866 * let the f/w know that the h/w is now under the control
4868 if (hw->mac_type != e1000_82573 ||
4869 !e1000_check_mng_mode(hw))
4870 e1000_get_hw_control(adapter);