1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
36 /* Intel Media SOC GbE MDIO physical base address */
37 static unsigned long ce4100_gbe_mdio_base_phy;
38 /* Intel Media SOC GbE MDIO virtual base address */
39 void __iomem *ce4100_gbe_mdio_base_virt;
41 char e1000_driver_name[] = "e1000";
42 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
43 #define DRV_VERSION "7.3.21-k8-NAPI"
44 const char e1000_driver_version[] = DRV_VERSION;
45 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
47 /* e1000_pci_tbl - PCI Device ID Table
49 * Last entry must be all 0s
52 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
54 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
55 INTEL_E1000_ETHERNET_DEVICE(0x1000),
56 INTEL_E1000_ETHERNET_DEVICE(0x1001),
57 INTEL_E1000_ETHERNET_DEVICE(0x1004),
58 INTEL_E1000_ETHERNET_DEVICE(0x1008),
59 INTEL_E1000_ETHERNET_DEVICE(0x1009),
60 INTEL_E1000_ETHERNET_DEVICE(0x100C),
61 INTEL_E1000_ETHERNET_DEVICE(0x100D),
62 INTEL_E1000_ETHERNET_DEVICE(0x100E),
63 INTEL_E1000_ETHERNET_DEVICE(0x100F),
64 INTEL_E1000_ETHERNET_DEVICE(0x1010),
65 INTEL_E1000_ETHERNET_DEVICE(0x1011),
66 INTEL_E1000_ETHERNET_DEVICE(0x1012),
67 INTEL_E1000_ETHERNET_DEVICE(0x1013),
68 INTEL_E1000_ETHERNET_DEVICE(0x1014),
69 INTEL_E1000_ETHERNET_DEVICE(0x1015),
70 INTEL_E1000_ETHERNET_DEVICE(0x1016),
71 INTEL_E1000_ETHERNET_DEVICE(0x1017),
72 INTEL_E1000_ETHERNET_DEVICE(0x1018),
73 INTEL_E1000_ETHERNET_DEVICE(0x1019),
74 INTEL_E1000_ETHERNET_DEVICE(0x101A),
75 INTEL_E1000_ETHERNET_DEVICE(0x101D),
76 INTEL_E1000_ETHERNET_DEVICE(0x101E),
77 INTEL_E1000_ETHERNET_DEVICE(0x1026),
78 INTEL_E1000_ETHERNET_DEVICE(0x1027),
79 INTEL_E1000_ETHERNET_DEVICE(0x1028),
80 INTEL_E1000_ETHERNET_DEVICE(0x1075),
81 INTEL_E1000_ETHERNET_DEVICE(0x1076),
82 INTEL_E1000_ETHERNET_DEVICE(0x1077),
83 INTEL_E1000_ETHERNET_DEVICE(0x1078),
84 INTEL_E1000_ETHERNET_DEVICE(0x1079),
85 INTEL_E1000_ETHERNET_DEVICE(0x107A),
86 INTEL_E1000_ETHERNET_DEVICE(0x107B),
87 INTEL_E1000_ETHERNET_DEVICE(0x107C),
88 INTEL_E1000_ETHERNET_DEVICE(0x108A),
89 INTEL_E1000_ETHERNET_DEVICE(0x1099),
90 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
91 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
92 /* required last entry */
96 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
98 int e1000_up(struct e1000_adapter *adapter);
99 void e1000_down(struct e1000_adapter *adapter);
100 void e1000_reinit_locked(struct e1000_adapter *adapter);
101 void e1000_reset(struct e1000_adapter *adapter);
102 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
103 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
104 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
105 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
106 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
107 struct e1000_tx_ring *txdr);
108 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
109 struct e1000_rx_ring *rxdr);
110 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
111 struct e1000_tx_ring *tx_ring);
112 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
113 struct e1000_rx_ring *rx_ring);
114 void e1000_update_stats(struct e1000_adapter *adapter);
116 static int e1000_init_module(void);
117 static void e1000_exit_module(void);
118 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
119 static void __devexit e1000_remove(struct pci_dev *pdev);
120 static int e1000_alloc_queues(struct e1000_adapter *adapter);
121 static int e1000_sw_init(struct e1000_adapter *adapter);
122 static int e1000_open(struct net_device *netdev);
123 static int e1000_close(struct net_device *netdev);
124 static void e1000_configure_tx(struct e1000_adapter *adapter);
125 static void e1000_configure_rx(struct e1000_adapter *adapter);
126 static void e1000_setup_rctl(struct e1000_adapter *adapter);
127 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
128 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
129 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
130 struct e1000_tx_ring *tx_ring);
131 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
132 struct e1000_rx_ring *rx_ring);
133 static void e1000_set_rx_mode(struct net_device *netdev);
134 static void e1000_update_phy_info_task(struct work_struct *work);
135 static void e1000_watchdog(struct work_struct *work);
136 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
137 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
138 struct net_device *netdev);
139 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
140 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
141 static int e1000_set_mac(struct net_device *netdev, void *p);
142 static irqreturn_t e1000_intr(int irq, void *data);
143 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
144 struct e1000_tx_ring *tx_ring);
145 static int e1000_clean(struct napi_struct *napi, int budget);
146 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
147 struct e1000_rx_ring *rx_ring,
148 int *work_done, int work_to_do);
149 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
150 struct e1000_rx_ring *rx_ring,
151 int *work_done, int work_to_do);
152 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
153 struct e1000_rx_ring *rx_ring,
155 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
156 struct e1000_rx_ring *rx_ring,
158 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
159 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
161 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
162 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
163 static void e1000_tx_timeout(struct net_device *dev);
164 static void e1000_reset_task(struct work_struct *work);
165 static void e1000_smartspeed(struct e1000_adapter *adapter);
166 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
167 struct sk_buff *skb);
169 static bool e1000_vlan_used(struct e1000_adapter *adapter);
170 static void e1000_vlan_mode(struct net_device *netdev, u32 features);
171 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
172 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
173 static void e1000_restore_vlan(struct e1000_adapter *adapter);
176 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
177 static int e1000_resume(struct pci_dev *pdev);
179 static void e1000_shutdown(struct pci_dev *pdev);
181 #ifdef CONFIG_NET_POLL_CONTROLLER
182 /* for netdump / net console */
183 static void e1000_netpoll (struct net_device *netdev);
186 #define COPYBREAK_DEFAULT 256
187 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
188 module_param(copybreak, uint, 0644);
189 MODULE_PARM_DESC(copybreak,
190 "Maximum size of packet that is copied to a new buffer on receive");
192 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
193 pci_channel_state_t state);
194 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
195 static void e1000_io_resume(struct pci_dev *pdev);
197 static struct pci_error_handlers e1000_err_handler = {
198 .error_detected = e1000_io_error_detected,
199 .slot_reset = e1000_io_slot_reset,
200 .resume = e1000_io_resume,
203 static struct pci_driver e1000_driver = {
204 .name = e1000_driver_name,
205 .id_table = e1000_pci_tbl,
206 .probe = e1000_probe,
207 .remove = __devexit_p(e1000_remove),
209 /* Power Management Hooks */
210 .suspend = e1000_suspend,
211 .resume = e1000_resume,
213 .shutdown = e1000_shutdown,
214 .err_handler = &e1000_err_handler
217 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
218 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
219 MODULE_LICENSE("GPL");
220 MODULE_VERSION(DRV_VERSION);
222 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
223 module_param(debug, int, 0);
224 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
227 * e1000_get_hw_dev - return device
228 * used by hardware layer to print debugging information
231 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
233 struct e1000_adapter *adapter = hw->back;
234 return adapter->netdev;
238 * e1000_init_module - Driver Registration Routine
240 * e1000_init_module is the first routine called when the driver is
241 * loaded. All it does is register with the PCI subsystem.
244 static int __init e1000_init_module(void)
247 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
249 pr_info("%s\n", e1000_copyright);
251 ret = pci_register_driver(&e1000_driver);
252 if (copybreak != COPYBREAK_DEFAULT) {
254 pr_info("copybreak disabled\n");
256 pr_info("copybreak enabled for "
257 "packets <= %u bytes\n", copybreak);
262 module_init(e1000_init_module);
265 * e1000_exit_module - Driver Exit Cleanup Routine
267 * e1000_exit_module is called just before the driver is removed
271 static void __exit e1000_exit_module(void)
273 pci_unregister_driver(&e1000_driver);
276 module_exit(e1000_exit_module);
278 static int e1000_request_irq(struct e1000_adapter *adapter)
280 struct net_device *netdev = adapter->netdev;
281 irq_handler_t handler = e1000_intr;
282 int irq_flags = IRQF_SHARED;
285 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
288 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
294 static void e1000_free_irq(struct e1000_adapter *adapter)
296 struct net_device *netdev = adapter->netdev;
298 free_irq(adapter->pdev->irq, netdev);
302 * e1000_irq_disable - Mask off interrupt generation on the NIC
303 * @adapter: board private structure
306 static void e1000_irq_disable(struct e1000_adapter *adapter)
308 struct e1000_hw *hw = &adapter->hw;
312 synchronize_irq(adapter->pdev->irq);
316 * e1000_irq_enable - Enable default interrupt generation settings
317 * @adapter: board private structure
320 static void e1000_irq_enable(struct e1000_adapter *adapter)
322 struct e1000_hw *hw = &adapter->hw;
324 ew32(IMS, IMS_ENABLE_MASK);
328 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
330 struct e1000_hw *hw = &adapter->hw;
331 struct net_device *netdev = adapter->netdev;
332 u16 vid = hw->mng_cookie.vlan_id;
333 u16 old_vid = adapter->mng_vlan_id;
335 if (!e1000_vlan_used(adapter))
338 if (!test_bit(vid, adapter->active_vlans)) {
339 if (hw->mng_cookie.status &
340 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
341 e1000_vlan_rx_add_vid(netdev, vid);
342 adapter->mng_vlan_id = vid;
344 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
346 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
348 !test_bit(old_vid, adapter->active_vlans))
349 e1000_vlan_rx_kill_vid(netdev, old_vid);
351 adapter->mng_vlan_id = vid;
355 static void e1000_init_manageability(struct e1000_adapter *adapter)
357 struct e1000_hw *hw = &adapter->hw;
359 if (adapter->en_mng_pt) {
360 u32 manc = er32(MANC);
362 /* disable hardware interception of ARP */
363 manc &= ~(E1000_MANC_ARP_EN);
369 static void e1000_release_manageability(struct e1000_adapter *adapter)
371 struct e1000_hw *hw = &adapter->hw;
373 if (adapter->en_mng_pt) {
374 u32 manc = er32(MANC);
376 /* re-enable hardware interception of ARP */
377 manc |= E1000_MANC_ARP_EN;
384 * e1000_configure - configure the hardware for RX and TX
385 * @adapter = private board structure
387 static void e1000_configure(struct e1000_adapter *adapter)
389 struct net_device *netdev = adapter->netdev;
392 e1000_set_rx_mode(netdev);
394 e1000_restore_vlan(adapter);
395 e1000_init_manageability(adapter);
397 e1000_configure_tx(adapter);
398 e1000_setup_rctl(adapter);
399 e1000_configure_rx(adapter);
400 /* call E1000_DESC_UNUSED which always leaves
401 * at least 1 descriptor unused to make sure
402 * next_to_use != next_to_clean */
403 for (i = 0; i < adapter->num_rx_queues; i++) {
404 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
405 adapter->alloc_rx_buf(adapter, ring,
406 E1000_DESC_UNUSED(ring));
410 int e1000_up(struct e1000_adapter *adapter)
412 struct e1000_hw *hw = &adapter->hw;
414 /* hardware has been reset, we need to reload some things */
415 e1000_configure(adapter);
417 clear_bit(__E1000_DOWN, &adapter->flags);
419 napi_enable(&adapter->napi);
421 e1000_irq_enable(adapter);
423 netif_wake_queue(adapter->netdev);
425 /* fire a link change interrupt to start the watchdog */
426 ew32(ICS, E1000_ICS_LSC);
431 * e1000_power_up_phy - restore link in case the phy was powered down
432 * @adapter: address of board private structure
434 * The phy may be powered down to save power and turn off link when the
435 * driver is unloaded and wake on lan is not enabled (among others)
436 * *** this routine MUST be followed by a call to e1000_reset ***
440 void e1000_power_up_phy(struct e1000_adapter *adapter)
442 struct e1000_hw *hw = &adapter->hw;
445 /* Just clear the power down bit to wake the phy back up */
446 if (hw->media_type == e1000_media_type_copper) {
447 /* according to the manual, the phy will retain its
448 * settings across a power-down/up cycle */
449 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
450 mii_reg &= ~MII_CR_POWER_DOWN;
451 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
455 static void e1000_power_down_phy(struct e1000_adapter *adapter)
457 struct e1000_hw *hw = &adapter->hw;
459 /* Power down the PHY so no link is implied when interface is down *
460 * The PHY cannot be powered down if any of the following is true *
463 * (c) SoL/IDER session is active */
464 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
465 hw->media_type == e1000_media_type_copper) {
468 switch (hw->mac_type) {
471 case e1000_82545_rev_3:
474 case e1000_82546_rev_3:
476 case e1000_82541_rev_2:
478 case e1000_82547_rev_2:
479 if (er32(MANC) & E1000_MANC_SMBUS_EN)
485 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
486 mii_reg |= MII_CR_POWER_DOWN;
487 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
494 static void e1000_down_and_stop(struct e1000_adapter *adapter)
496 set_bit(__E1000_DOWN, &adapter->flags);
497 cancel_work_sync(&adapter->reset_task);
498 cancel_delayed_work_sync(&adapter->watchdog_task);
499 cancel_delayed_work_sync(&adapter->phy_info_task);
500 cancel_delayed_work_sync(&adapter->fifo_stall_task);
503 void e1000_down(struct e1000_adapter *adapter)
505 struct e1000_hw *hw = &adapter->hw;
506 struct net_device *netdev = adapter->netdev;
510 /* disable receives in the hardware */
512 ew32(RCTL, rctl & ~E1000_RCTL_EN);
513 /* flush and sleep below */
515 netif_tx_disable(netdev);
517 /* disable transmits in the hardware */
519 tctl &= ~E1000_TCTL_EN;
521 /* flush both disables and wait for them to finish */
525 napi_disable(&adapter->napi);
527 e1000_irq_disable(adapter);
530 * Setting DOWN must be after irq_disable to prevent
531 * a screaming interrupt. Setting DOWN also prevents
532 * tasks from rescheduling.
534 e1000_down_and_stop(adapter);
536 adapter->link_speed = 0;
537 adapter->link_duplex = 0;
538 netif_carrier_off(netdev);
540 e1000_reset(adapter);
541 e1000_clean_all_tx_rings(adapter);
542 e1000_clean_all_rx_rings(adapter);
545 static void e1000_reinit_safe(struct e1000_adapter *adapter)
547 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
553 clear_bit(__E1000_RESETTING, &adapter->flags);
556 void e1000_reinit_locked(struct e1000_adapter *adapter)
558 /* if rtnl_lock is not held the call path is bogus */
560 WARN_ON(in_interrupt());
561 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
565 clear_bit(__E1000_RESETTING, &adapter->flags);
568 void e1000_reset(struct e1000_adapter *adapter)
570 struct e1000_hw *hw = &adapter->hw;
571 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
572 bool legacy_pba_adjust = false;
575 /* Repartition Pba for greater than 9k mtu
576 * To take effect CTRL.RST is required.
579 switch (hw->mac_type) {
580 case e1000_82542_rev2_0:
581 case e1000_82542_rev2_1:
586 case e1000_82541_rev_2:
587 legacy_pba_adjust = true;
591 case e1000_82545_rev_3:
594 case e1000_82546_rev_3:
598 case e1000_82547_rev_2:
599 legacy_pba_adjust = true;
602 case e1000_undefined:
607 if (legacy_pba_adjust) {
608 if (hw->max_frame_size > E1000_RXBUFFER_8192)
609 pba -= 8; /* allocate more FIFO for Tx */
611 if (hw->mac_type == e1000_82547) {
612 adapter->tx_fifo_head = 0;
613 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
614 adapter->tx_fifo_size =
615 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
616 atomic_set(&adapter->tx_fifo_stall, 0);
618 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
619 /* adjust PBA for jumbo frames */
622 /* To maintain wire speed transmits, the Tx FIFO should be
623 * large enough to accommodate two full transmit packets,
624 * rounded up to the next 1KB and expressed in KB. Likewise,
625 * the Rx FIFO should be large enough to accommodate at least
626 * one full receive packet and is similarly rounded up and
627 * expressed in KB. */
629 /* upper 16 bits has Tx packet buffer allocation size in KB */
630 tx_space = pba >> 16;
631 /* lower 16 bits has Rx packet buffer allocation size in KB */
634 * the tx fifo also stores 16 bytes of information about the tx
635 * but don't include ethernet FCS because hardware appends it
637 min_tx_space = (hw->max_frame_size +
638 sizeof(struct e1000_tx_desc) -
640 min_tx_space = ALIGN(min_tx_space, 1024);
642 /* software strips receive CRC, so leave room for it */
643 min_rx_space = hw->max_frame_size;
644 min_rx_space = ALIGN(min_rx_space, 1024);
647 /* If current Tx allocation is less than the min Tx FIFO size,
648 * and the min Tx FIFO size is less than the current Rx FIFO
649 * allocation, take space away from current Rx allocation */
650 if (tx_space < min_tx_space &&
651 ((min_tx_space - tx_space) < pba)) {
652 pba = pba - (min_tx_space - tx_space);
654 /* PCI/PCIx hardware has PBA alignment constraints */
655 switch (hw->mac_type) {
656 case e1000_82545 ... e1000_82546_rev_3:
657 pba &= ~(E1000_PBA_8K - 1);
663 /* if short on rx space, rx wins and must trump tx
664 * adjustment or use Early Receive if available */
665 if (pba < min_rx_space)
673 * flow control settings:
674 * The high water mark must be low enough to fit one full frame
675 * (or the size used for early receive) above it in the Rx FIFO.
676 * Set it to the lower of:
677 * - 90% of the Rx FIFO size, and
678 * - the full Rx FIFO size minus the early receive size (for parts
679 * with ERT support assuming ERT set to E1000_ERT_2048), or
680 * - the full Rx FIFO size minus one full frame
682 hwm = min(((pba << 10) * 9 / 10),
683 ((pba << 10) - hw->max_frame_size));
685 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
686 hw->fc_low_water = hw->fc_high_water - 8;
687 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
689 hw->fc = hw->original_fc;
691 /* Allow time for pending master requests to run */
693 if (hw->mac_type >= e1000_82544)
696 if (e1000_init_hw(hw))
697 e_dev_err("Hardware Error\n");
698 e1000_update_mng_vlan(adapter);
700 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
701 if (hw->mac_type >= e1000_82544 &&
703 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
704 u32 ctrl = er32(CTRL);
705 /* clear phy power management bit if we are in gig only mode,
706 * which if enabled will attempt negotiation to 100Mb, which
707 * can cause a loss of link at power off or driver unload */
708 ctrl &= ~E1000_CTRL_SWDPIN3;
712 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
713 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
715 e1000_reset_adaptive(hw);
716 e1000_phy_get_info(hw, &adapter->phy_info);
718 e1000_release_manageability(adapter);
722 * Dump the eeprom for users having checksum issues
724 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
726 struct net_device *netdev = adapter->netdev;
727 struct ethtool_eeprom eeprom;
728 const struct ethtool_ops *ops = netdev->ethtool_ops;
731 u16 csum_old, csum_new = 0;
733 eeprom.len = ops->get_eeprom_len(netdev);
736 data = kmalloc(eeprom.len, GFP_KERNEL);
738 pr_err("Unable to allocate memory to dump EEPROM data\n");
742 ops->get_eeprom(netdev, &eeprom, data);
744 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
745 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
746 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
747 csum_new += data[i] + (data[i + 1] << 8);
748 csum_new = EEPROM_SUM - csum_new;
750 pr_err("/*********************/\n");
751 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
752 pr_err("Calculated : 0x%04x\n", csum_new);
754 pr_err("Offset Values\n");
755 pr_err("======== ======\n");
756 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
758 pr_err("Include this output when contacting your support provider.\n");
759 pr_err("This is not a software error! Something bad happened to\n");
760 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
761 pr_err("result in further problems, possibly loss of data,\n");
762 pr_err("corruption or system hangs!\n");
763 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
764 pr_err("which is invalid and requires you to set the proper MAC\n");
765 pr_err("address manually before continuing to enable this network\n");
766 pr_err("device. Please inspect the EEPROM dump and report the\n");
767 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
768 pr_err("/*********************/\n");
774 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
775 * @pdev: PCI device information struct
777 * Return true if an adapter needs ioport resources
779 static int e1000_is_need_ioport(struct pci_dev *pdev)
781 switch (pdev->device) {
782 case E1000_DEV_ID_82540EM:
783 case E1000_DEV_ID_82540EM_LOM:
784 case E1000_DEV_ID_82540EP:
785 case E1000_DEV_ID_82540EP_LOM:
786 case E1000_DEV_ID_82540EP_LP:
787 case E1000_DEV_ID_82541EI:
788 case E1000_DEV_ID_82541EI_MOBILE:
789 case E1000_DEV_ID_82541ER:
790 case E1000_DEV_ID_82541ER_LOM:
791 case E1000_DEV_ID_82541GI:
792 case E1000_DEV_ID_82541GI_LF:
793 case E1000_DEV_ID_82541GI_MOBILE:
794 case E1000_DEV_ID_82544EI_COPPER:
795 case E1000_DEV_ID_82544EI_FIBER:
796 case E1000_DEV_ID_82544GC_COPPER:
797 case E1000_DEV_ID_82544GC_LOM:
798 case E1000_DEV_ID_82545EM_COPPER:
799 case E1000_DEV_ID_82545EM_FIBER:
800 case E1000_DEV_ID_82546EB_COPPER:
801 case E1000_DEV_ID_82546EB_FIBER:
802 case E1000_DEV_ID_82546EB_QUAD_COPPER:
809 static u32 e1000_fix_features(struct net_device *netdev, u32 features)
812 * Since there is no support for separate rx/tx vlan accel
813 * enable/disable make sure tx flag is always in same state as rx.
815 if (features & NETIF_F_HW_VLAN_RX)
816 features |= NETIF_F_HW_VLAN_TX;
818 features &= ~NETIF_F_HW_VLAN_TX;
823 static int e1000_set_features(struct net_device *netdev, u32 features)
825 struct e1000_adapter *adapter = netdev_priv(netdev);
826 u32 changed = features ^ netdev->features;
828 if (changed & NETIF_F_HW_VLAN_RX)
829 e1000_vlan_mode(netdev, features);
831 if (!(changed & NETIF_F_RXCSUM))
834 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
836 if (netif_running(netdev))
837 e1000_reinit_locked(adapter);
839 e1000_reset(adapter);
844 static const struct net_device_ops e1000_netdev_ops = {
845 .ndo_open = e1000_open,
846 .ndo_stop = e1000_close,
847 .ndo_start_xmit = e1000_xmit_frame,
848 .ndo_get_stats = e1000_get_stats,
849 .ndo_set_rx_mode = e1000_set_rx_mode,
850 .ndo_set_mac_address = e1000_set_mac,
851 .ndo_tx_timeout = e1000_tx_timeout,
852 .ndo_change_mtu = e1000_change_mtu,
853 .ndo_do_ioctl = e1000_ioctl,
854 .ndo_validate_addr = eth_validate_addr,
855 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
856 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
857 #ifdef CONFIG_NET_POLL_CONTROLLER
858 .ndo_poll_controller = e1000_netpoll,
860 .ndo_fix_features = e1000_fix_features,
861 .ndo_set_features = e1000_set_features,
865 * e1000_init_hw_struct - initialize members of hw struct
866 * @adapter: board private struct
867 * @hw: structure used by e1000_hw.c
869 * Factors out initialization of the e1000_hw struct to its own function
870 * that can be called very early at init (just after struct allocation).
871 * Fields are initialized based on PCI device information and
872 * OS network device settings (MTU size).
873 * Returns negative error codes if MAC type setup fails.
875 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
878 struct pci_dev *pdev = adapter->pdev;
880 /* PCI config space info */
881 hw->vendor_id = pdev->vendor;
882 hw->device_id = pdev->device;
883 hw->subsystem_vendor_id = pdev->subsystem_vendor;
884 hw->subsystem_id = pdev->subsystem_device;
885 hw->revision_id = pdev->revision;
887 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
889 hw->max_frame_size = adapter->netdev->mtu +
890 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
891 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
893 /* identify the MAC */
894 if (e1000_set_mac_type(hw)) {
895 e_err(probe, "Unknown MAC Type\n");
899 switch (hw->mac_type) {
904 case e1000_82541_rev_2:
905 case e1000_82547_rev_2:
906 hw->phy_init_script = 1;
910 e1000_set_media_type(hw);
911 e1000_get_bus_info(hw);
913 hw->wait_autoneg_complete = false;
914 hw->tbi_compatibility_en = true;
915 hw->adaptive_ifs = true;
919 if (hw->media_type == e1000_media_type_copper) {
920 hw->mdix = AUTO_ALL_MODES;
921 hw->disable_polarity_correction = false;
922 hw->master_slave = E1000_MASTER_SLAVE;
929 * e1000_probe - Device Initialization Routine
930 * @pdev: PCI device information struct
931 * @ent: entry in e1000_pci_tbl
933 * Returns 0 on success, negative on failure
935 * e1000_probe initializes an adapter identified by a pci_dev structure.
936 * The OS initialization, configuring of the adapter private structure,
937 * and a hardware reset occur.
939 static int __devinit e1000_probe(struct pci_dev *pdev,
940 const struct pci_device_id *ent)
942 struct net_device *netdev;
943 struct e1000_adapter *adapter;
946 static int cards_found = 0;
947 static int global_quad_port_a = 0; /* global ksp3 port a indication */
948 int i, err, pci_using_dac;
951 u16 eeprom_apme_mask = E1000_EEPROM_APME;
952 int bars, need_ioport;
954 /* do not allocate ioport bars when not needed */
955 need_ioport = e1000_is_need_ioport(pdev);
957 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
958 err = pci_enable_device(pdev);
960 bars = pci_select_bars(pdev, IORESOURCE_MEM);
961 err = pci_enable_device_mem(pdev);
966 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
970 pci_set_master(pdev);
971 err = pci_save_state(pdev);
973 goto err_alloc_etherdev;
976 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
978 goto err_alloc_etherdev;
980 SET_NETDEV_DEV(netdev, &pdev->dev);
982 pci_set_drvdata(pdev, netdev);
983 adapter = netdev_priv(netdev);
984 adapter->netdev = netdev;
985 adapter->pdev = pdev;
986 adapter->msg_enable = (1 << debug) - 1;
987 adapter->bars = bars;
988 adapter->need_ioport = need_ioport;
994 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
998 if (adapter->need_ioport) {
999 for (i = BAR_1; i <= BAR_5; i++) {
1000 if (pci_resource_len(pdev, i) == 0)
1002 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1003 hw->io_base = pci_resource_start(pdev, i);
1009 /* make ready for any if (hw->...) below */
1010 err = e1000_init_hw_struct(adapter, hw);
1015 * there is a workaround being applied below that limits
1016 * 64-bit DMA addresses to 64-bit hardware. There are some
1017 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1020 if ((hw->bus_type == e1000_bus_type_pcix) &&
1021 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1023 * according to DMA-API-HOWTO, coherent calls will always
1024 * succeed if the set call did
1026 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1029 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1031 pr_err("No usable DMA config, aborting\n");
1034 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1037 netdev->netdev_ops = &e1000_netdev_ops;
1038 e1000_set_ethtool_ops(netdev);
1039 netdev->watchdog_timeo = 5 * HZ;
1040 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1042 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1044 adapter->bd_number = cards_found;
1046 /* setup the private structure */
1048 err = e1000_sw_init(adapter);
1053 if (hw->mac_type == e1000_ce4100) {
1054 ce4100_gbe_mdio_base_phy = pci_resource_start(pdev, BAR_1);
1055 ce4100_gbe_mdio_base_virt = ioremap(ce4100_gbe_mdio_base_phy,
1056 pci_resource_len(pdev, BAR_1));
1058 if (!ce4100_gbe_mdio_base_virt)
1059 goto err_mdio_ioremap;
1062 if (hw->mac_type >= e1000_82543) {
1063 netdev->hw_features = NETIF_F_SG |
1066 netdev->features = NETIF_F_HW_VLAN_TX |
1067 NETIF_F_HW_VLAN_FILTER;
1070 if ((hw->mac_type >= e1000_82544) &&
1071 (hw->mac_type != e1000_82547))
1072 netdev->hw_features |= NETIF_F_TSO;
1074 netdev->features |= netdev->hw_features;
1075 netdev->hw_features |= NETIF_F_RXCSUM;
1077 if (pci_using_dac) {
1078 netdev->features |= NETIF_F_HIGHDMA;
1079 netdev->vlan_features |= NETIF_F_HIGHDMA;
1082 netdev->vlan_features |= NETIF_F_TSO;
1083 netdev->vlan_features |= NETIF_F_HW_CSUM;
1084 netdev->vlan_features |= NETIF_F_SG;
1086 netdev->priv_flags |= IFF_UNICAST_FLT;
1088 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1090 /* initialize eeprom parameters */
1091 if (e1000_init_eeprom_params(hw)) {
1092 e_err(probe, "EEPROM initialization failed\n");
1096 /* before reading the EEPROM, reset the controller to
1097 * put the device in a known good starting state */
1101 /* make sure the EEPROM is good */
1102 if (e1000_validate_eeprom_checksum(hw) < 0) {
1103 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1104 e1000_dump_eeprom(adapter);
1106 * set MAC address to all zeroes to invalidate and temporary
1107 * disable this device for the user. This blocks regular
1108 * traffic while still permitting ethtool ioctls from reaching
1109 * the hardware as well as allowing the user to run the
1110 * interface after manually setting a hw addr using
1113 memset(hw->mac_addr, 0, netdev->addr_len);
1115 /* copy the MAC address out of the EEPROM */
1116 if (e1000_read_mac_addr(hw))
1117 e_err(probe, "EEPROM Read Error\n");
1119 /* don't block initalization here due to bad MAC address */
1120 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1121 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1123 if (!is_valid_ether_addr(netdev->perm_addr))
1124 e_err(probe, "Invalid MAC Address\n");
1127 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1128 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1129 e1000_82547_tx_fifo_stall_task);
1130 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1131 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1133 e1000_check_options(adapter);
1135 /* Initial Wake on LAN setting
1136 * If APM wake is enabled in the EEPROM,
1137 * enable the ACPI Magic Packet filter
1140 switch (hw->mac_type) {
1141 case e1000_82542_rev2_0:
1142 case e1000_82542_rev2_1:
1146 e1000_read_eeprom(hw,
1147 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1148 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1151 case e1000_82546_rev_3:
1152 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1153 e1000_read_eeprom(hw,
1154 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1159 e1000_read_eeprom(hw,
1160 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1163 if (eeprom_data & eeprom_apme_mask)
1164 adapter->eeprom_wol |= E1000_WUFC_MAG;
1166 /* now that we have the eeprom settings, apply the special cases
1167 * where the eeprom may be wrong or the board simply won't support
1168 * wake on lan on a particular port */
1169 switch (pdev->device) {
1170 case E1000_DEV_ID_82546GB_PCIE:
1171 adapter->eeprom_wol = 0;
1173 case E1000_DEV_ID_82546EB_FIBER:
1174 case E1000_DEV_ID_82546GB_FIBER:
1175 /* Wake events only supported on port A for dual fiber
1176 * regardless of eeprom setting */
1177 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1178 adapter->eeprom_wol = 0;
1180 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1181 /* if quad port adapter, disable WoL on all but port A */
1182 if (global_quad_port_a != 0)
1183 adapter->eeprom_wol = 0;
1185 adapter->quad_port_a = 1;
1186 /* Reset for multiple quad port adapters */
1187 if (++global_quad_port_a == 4)
1188 global_quad_port_a = 0;
1192 /* initialize the wol settings based on the eeprom settings */
1193 adapter->wol = adapter->eeprom_wol;
1194 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1196 /* Auto detect PHY address */
1197 if (hw->mac_type == e1000_ce4100) {
1198 for (i = 0; i < 32; i++) {
1200 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1201 if (tmp == 0 || tmp == 0xFF) {
1210 /* reset the hardware with the new settings */
1211 e1000_reset(adapter);
1213 strcpy(netdev->name, "eth%d");
1214 err = register_netdev(netdev);
1218 e1000_vlan_mode(netdev, netdev->features);
1220 /* print bus type/speed/width info */
1221 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1222 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1223 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1224 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1225 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1226 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1227 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1230 /* carrier off reporting is important to ethtool even BEFORE open */
1231 netif_carrier_off(netdev);
1233 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1240 e1000_phy_hw_reset(hw);
1242 if (hw->flash_address)
1243 iounmap(hw->flash_address);
1244 kfree(adapter->tx_ring);
1245 kfree(adapter->rx_ring);
1249 iounmap(ce4100_gbe_mdio_base_virt);
1250 iounmap(hw->hw_addr);
1252 free_netdev(netdev);
1254 pci_release_selected_regions(pdev, bars);
1256 pci_disable_device(pdev);
1261 * e1000_remove - Device Removal Routine
1262 * @pdev: PCI device information struct
1264 * e1000_remove is called by the PCI subsystem to alert the driver
1265 * that it should release a PCI device. The could be caused by a
1266 * Hot-Plug event, or because the driver is going to be removed from
1270 static void __devexit e1000_remove(struct pci_dev *pdev)
1272 struct net_device *netdev = pci_get_drvdata(pdev);
1273 struct e1000_adapter *adapter = netdev_priv(netdev);
1274 struct e1000_hw *hw = &adapter->hw;
1276 e1000_down_and_stop(adapter);
1277 e1000_release_manageability(adapter);
1279 unregister_netdev(netdev);
1281 e1000_phy_hw_reset(hw);
1283 kfree(adapter->tx_ring);
1284 kfree(adapter->rx_ring);
1286 iounmap(hw->hw_addr);
1287 if (hw->flash_address)
1288 iounmap(hw->flash_address);
1289 pci_release_selected_regions(pdev, adapter->bars);
1291 free_netdev(netdev);
1293 pci_disable_device(pdev);
1297 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1298 * @adapter: board private structure to initialize
1300 * e1000_sw_init initializes the Adapter private data structure.
1301 * e1000_init_hw_struct MUST be called before this function
1304 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1306 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1308 adapter->num_tx_queues = 1;
1309 adapter->num_rx_queues = 1;
1311 if (e1000_alloc_queues(adapter)) {
1312 e_err(probe, "Unable to allocate memory for queues\n");
1316 /* Explicitly disable IRQ since the NIC can be in any state. */
1317 e1000_irq_disable(adapter);
1319 spin_lock_init(&adapter->stats_lock);
1321 set_bit(__E1000_DOWN, &adapter->flags);
1327 * e1000_alloc_queues - Allocate memory for all rings
1328 * @adapter: board private structure to initialize
1330 * We allocate one ring per queue at run-time since we don't know the
1331 * number of queues at compile-time.
1334 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1336 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1337 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1338 if (!adapter->tx_ring)
1341 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1342 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1343 if (!adapter->rx_ring) {
1344 kfree(adapter->tx_ring);
1348 return E1000_SUCCESS;
1352 * e1000_open - Called when a network interface is made active
1353 * @netdev: network interface device structure
1355 * Returns 0 on success, negative value on failure
1357 * The open entry point is called when a network interface is made
1358 * active by the system (IFF_UP). At this point all resources needed
1359 * for transmit and receive operations are allocated, the interrupt
1360 * handler is registered with the OS, the watchdog task is started,
1361 * and the stack is notified that the interface is ready.
1364 static int e1000_open(struct net_device *netdev)
1366 struct e1000_adapter *adapter = netdev_priv(netdev);
1367 struct e1000_hw *hw = &adapter->hw;
1370 /* disallow open during test */
1371 if (test_bit(__E1000_TESTING, &adapter->flags))
1374 netif_carrier_off(netdev);
1376 /* allocate transmit descriptors */
1377 err = e1000_setup_all_tx_resources(adapter);
1381 /* allocate receive descriptors */
1382 err = e1000_setup_all_rx_resources(adapter);
1386 e1000_power_up_phy(adapter);
1388 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1389 if ((hw->mng_cookie.status &
1390 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1391 e1000_update_mng_vlan(adapter);
1394 /* before we allocate an interrupt, we must be ready to handle it.
1395 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1396 * as soon as we call pci_request_irq, so we have to setup our
1397 * clean_rx handler before we do so. */
1398 e1000_configure(adapter);
1400 err = e1000_request_irq(adapter);
1404 /* From here on the code is the same as e1000_up() */
1405 clear_bit(__E1000_DOWN, &adapter->flags);
1407 napi_enable(&adapter->napi);
1409 e1000_irq_enable(adapter);
1411 netif_start_queue(netdev);
1413 /* fire a link status change interrupt to start the watchdog */
1414 ew32(ICS, E1000_ICS_LSC);
1416 return E1000_SUCCESS;
1419 e1000_power_down_phy(adapter);
1420 e1000_free_all_rx_resources(adapter);
1422 e1000_free_all_tx_resources(adapter);
1424 e1000_reset(adapter);
1430 * e1000_close - Disables a network interface
1431 * @netdev: network interface device structure
1433 * Returns 0, this is not allowed to fail
1435 * The close entry point is called when an interface is de-activated
1436 * by the OS. The hardware is still under the drivers control, but
1437 * needs to be disabled. A global MAC reset is issued to stop the
1438 * hardware, and all transmit and receive resources are freed.
1441 static int e1000_close(struct net_device *netdev)
1443 struct e1000_adapter *adapter = netdev_priv(netdev);
1444 struct e1000_hw *hw = &adapter->hw;
1446 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1447 e1000_down(adapter);
1448 e1000_power_down_phy(adapter);
1449 e1000_free_irq(adapter);
1451 e1000_free_all_tx_resources(adapter);
1452 e1000_free_all_rx_resources(adapter);
1454 /* kill manageability vlan ID if supported, but not if a vlan with
1455 * the same ID is registered on the host OS (let 8021q kill it) */
1456 if ((hw->mng_cookie.status &
1457 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1458 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1459 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1466 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1467 * @adapter: address of board private structure
1468 * @start: address of beginning of memory
1469 * @len: length of memory
1471 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1474 struct e1000_hw *hw = &adapter->hw;
1475 unsigned long begin = (unsigned long)start;
1476 unsigned long end = begin + len;
1478 /* First rev 82545 and 82546 need to not allow any memory
1479 * write location to cross 64k boundary due to errata 23 */
1480 if (hw->mac_type == e1000_82545 ||
1481 hw->mac_type == e1000_ce4100 ||
1482 hw->mac_type == e1000_82546) {
1483 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1490 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1491 * @adapter: board private structure
1492 * @txdr: tx descriptor ring (for a specific queue) to setup
1494 * Return 0 on success, negative on failure
1497 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1498 struct e1000_tx_ring *txdr)
1500 struct pci_dev *pdev = adapter->pdev;
1503 size = sizeof(struct e1000_buffer) * txdr->count;
1504 txdr->buffer_info = vzalloc(size);
1505 if (!txdr->buffer_info) {
1506 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1511 /* round up to nearest 4K */
1513 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1514 txdr->size = ALIGN(txdr->size, 4096);
1516 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1520 vfree(txdr->buffer_info);
1521 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1526 /* Fix for errata 23, can't cross 64kB boundary */
1527 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1528 void *olddesc = txdr->desc;
1529 dma_addr_t olddma = txdr->dma;
1530 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1531 txdr->size, txdr->desc);
1532 /* Try again, without freeing the previous */
1533 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1534 &txdr->dma, GFP_KERNEL);
1535 /* Failed allocation, critical failure */
1537 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1539 goto setup_tx_desc_die;
1542 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1544 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1546 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1548 e_err(probe, "Unable to allocate aligned memory "
1549 "for the transmit descriptor ring\n");
1550 vfree(txdr->buffer_info);
1553 /* Free old allocation, new allocation was successful */
1554 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1558 memset(txdr->desc, 0, txdr->size);
1560 txdr->next_to_use = 0;
1561 txdr->next_to_clean = 0;
1567 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1568 * (Descriptors) for all queues
1569 * @adapter: board private structure
1571 * Return 0 on success, negative on failure
1574 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1578 for (i = 0; i < adapter->num_tx_queues; i++) {
1579 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1581 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1582 for (i-- ; i >= 0; i--)
1583 e1000_free_tx_resources(adapter,
1584 &adapter->tx_ring[i]);
1593 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1594 * @adapter: board private structure
1596 * Configure the Tx unit of the MAC after a reset.
1599 static void e1000_configure_tx(struct e1000_adapter *adapter)
1602 struct e1000_hw *hw = &adapter->hw;
1603 u32 tdlen, tctl, tipg;
1606 /* Setup the HW Tx Head and Tail descriptor pointers */
1608 switch (adapter->num_tx_queues) {
1611 tdba = adapter->tx_ring[0].dma;
1612 tdlen = adapter->tx_ring[0].count *
1613 sizeof(struct e1000_tx_desc);
1615 ew32(TDBAH, (tdba >> 32));
1616 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1619 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1620 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1624 /* Set the default values for the Tx Inter Packet Gap timer */
1625 if ((hw->media_type == e1000_media_type_fiber ||
1626 hw->media_type == e1000_media_type_internal_serdes))
1627 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1629 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1631 switch (hw->mac_type) {
1632 case e1000_82542_rev2_0:
1633 case e1000_82542_rev2_1:
1634 tipg = DEFAULT_82542_TIPG_IPGT;
1635 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1636 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1639 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1640 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1643 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1644 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1647 /* Set the Tx Interrupt Delay register */
1649 ew32(TIDV, adapter->tx_int_delay);
1650 if (hw->mac_type >= e1000_82540)
1651 ew32(TADV, adapter->tx_abs_int_delay);
1653 /* Program the Transmit Control Register */
1656 tctl &= ~E1000_TCTL_CT;
1657 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1658 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1660 e1000_config_collision_dist(hw);
1662 /* Setup Transmit Descriptor Settings for eop descriptor */
1663 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1665 /* only set IDE if we are delaying interrupts using the timers */
1666 if (adapter->tx_int_delay)
1667 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1669 if (hw->mac_type < e1000_82543)
1670 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1672 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1674 /* Cache if we're 82544 running in PCI-X because we'll
1675 * need this to apply a workaround later in the send path. */
1676 if (hw->mac_type == e1000_82544 &&
1677 hw->bus_type == e1000_bus_type_pcix)
1678 adapter->pcix_82544 = 1;
1685 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1686 * @adapter: board private structure
1687 * @rxdr: rx descriptor ring (for a specific queue) to setup
1689 * Returns 0 on success, negative on failure
1692 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1693 struct e1000_rx_ring *rxdr)
1695 struct pci_dev *pdev = adapter->pdev;
1698 size = sizeof(struct e1000_buffer) * rxdr->count;
1699 rxdr->buffer_info = vzalloc(size);
1700 if (!rxdr->buffer_info) {
1701 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1706 desc_len = sizeof(struct e1000_rx_desc);
1708 /* Round up to nearest 4K */
1710 rxdr->size = rxdr->count * desc_len;
1711 rxdr->size = ALIGN(rxdr->size, 4096);
1713 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1717 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1720 vfree(rxdr->buffer_info);
1724 /* Fix for errata 23, can't cross 64kB boundary */
1725 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1726 void *olddesc = rxdr->desc;
1727 dma_addr_t olddma = rxdr->dma;
1728 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1729 rxdr->size, rxdr->desc);
1730 /* Try again, without freeing the previous */
1731 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1732 &rxdr->dma, GFP_KERNEL);
1733 /* Failed allocation, critical failure */
1735 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1737 e_err(probe, "Unable to allocate memory for the Rx "
1738 "descriptor ring\n");
1739 goto setup_rx_desc_die;
1742 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1744 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1746 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1748 e_err(probe, "Unable to allocate aligned memory for "
1749 "the Rx descriptor ring\n");
1750 goto setup_rx_desc_die;
1752 /* Free old allocation, new allocation was successful */
1753 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1757 memset(rxdr->desc, 0, rxdr->size);
1759 rxdr->next_to_clean = 0;
1760 rxdr->next_to_use = 0;
1761 rxdr->rx_skb_top = NULL;
1767 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1768 * (Descriptors) for all queues
1769 * @adapter: board private structure
1771 * Return 0 on success, negative on failure
1774 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1778 for (i = 0; i < adapter->num_rx_queues; i++) {
1779 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1781 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1782 for (i-- ; i >= 0; i--)
1783 e1000_free_rx_resources(adapter,
1784 &adapter->rx_ring[i]);
1793 * e1000_setup_rctl - configure the receive control registers
1794 * @adapter: Board private structure
1796 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1798 struct e1000_hw *hw = &adapter->hw;
1803 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1805 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1806 E1000_RCTL_RDMTS_HALF |
1807 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1809 if (hw->tbi_compatibility_on == 1)
1810 rctl |= E1000_RCTL_SBP;
1812 rctl &= ~E1000_RCTL_SBP;
1814 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1815 rctl &= ~E1000_RCTL_LPE;
1817 rctl |= E1000_RCTL_LPE;
1819 /* Setup buffer sizes */
1820 rctl &= ~E1000_RCTL_SZ_4096;
1821 rctl |= E1000_RCTL_BSEX;
1822 switch (adapter->rx_buffer_len) {
1823 case E1000_RXBUFFER_2048:
1825 rctl |= E1000_RCTL_SZ_2048;
1826 rctl &= ~E1000_RCTL_BSEX;
1828 case E1000_RXBUFFER_4096:
1829 rctl |= E1000_RCTL_SZ_4096;
1831 case E1000_RXBUFFER_8192:
1832 rctl |= E1000_RCTL_SZ_8192;
1834 case E1000_RXBUFFER_16384:
1835 rctl |= E1000_RCTL_SZ_16384;
1843 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1844 * @adapter: board private structure
1846 * Configure the Rx unit of the MAC after a reset.
1849 static void e1000_configure_rx(struct e1000_adapter *adapter)
1852 struct e1000_hw *hw = &adapter->hw;
1853 u32 rdlen, rctl, rxcsum;
1855 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1856 rdlen = adapter->rx_ring[0].count *
1857 sizeof(struct e1000_rx_desc);
1858 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1859 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1861 rdlen = adapter->rx_ring[0].count *
1862 sizeof(struct e1000_rx_desc);
1863 adapter->clean_rx = e1000_clean_rx_irq;
1864 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1867 /* disable receives while setting up the descriptors */
1869 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1871 /* set the Receive Delay Timer Register */
1872 ew32(RDTR, adapter->rx_int_delay);
1874 if (hw->mac_type >= e1000_82540) {
1875 ew32(RADV, adapter->rx_abs_int_delay);
1876 if (adapter->itr_setting != 0)
1877 ew32(ITR, 1000000000 / (adapter->itr * 256));
1880 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1881 * the Base and Length of the Rx Descriptor Ring */
1882 switch (adapter->num_rx_queues) {
1885 rdba = adapter->rx_ring[0].dma;
1887 ew32(RDBAH, (rdba >> 32));
1888 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1891 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1892 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1896 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1897 if (hw->mac_type >= e1000_82543) {
1898 rxcsum = er32(RXCSUM);
1899 if (adapter->rx_csum)
1900 rxcsum |= E1000_RXCSUM_TUOFL;
1902 /* don't need to clear IPPCSE as it defaults to 0 */
1903 rxcsum &= ~E1000_RXCSUM_TUOFL;
1904 ew32(RXCSUM, rxcsum);
1907 /* Enable Receives */
1908 ew32(RCTL, rctl | E1000_RCTL_EN);
1912 * e1000_free_tx_resources - Free Tx Resources per Queue
1913 * @adapter: board private structure
1914 * @tx_ring: Tx descriptor ring for a specific queue
1916 * Free all transmit software resources
1919 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1920 struct e1000_tx_ring *tx_ring)
1922 struct pci_dev *pdev = adapter->pdev;
1924 e1000_clean_tx_ring(adapter, tx_ring);
1926 vfree(tx_ring->buffer_info);
1927 tx_ring->buffer_info = NULL;
1929 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1932 tx_ring->desc = NULL;
1936 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1937 * @adapter: board private structure
1939 * Free all transmit software resources
1942 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1946 for (i = 0; i < adapter->num_tx_queues; i++)
1947 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1950 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1951 struct e1000_buffer *buffer_info)
1953 if (buffer_info->dma) {
1954 if (buffer_info->mapped_as_page)
1955 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1956 buffer_info->length, DMA_TO_DEVICE);
1958 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1959 buffer_info->length,
1961 buffer_info->dma = 0;
1963 if (buffer_info->skb) {
1964 dev_kfree_skb_any(buffer_info->skb);
1965 buffer_info->skb = NULL;
1967 buffer_info->time_stamp = 0;
1968 /* buffer_info must be completely set up in the transmit path */
1972 * e1000_clean_tx_ring - Free Tx Buffers
1973 * @adapter: board private structure
1974 * @tx_ring: ring to be cleaned
1977 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1978 struct e1000_tx_ring *tx_ring)
1980 struct e1000_hw *hw = &adapter->hw;
1981 struct e1000_buffer *buffer_info;
1985 /* Free all the Tx ring sk_buffs */
1987 for (i = 0; i < tx_ring->count; i++) {
1988 buffer_info = &tx_ring->buffer_info[i];
1989 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1992 size = sizeof(struct e1000_buffer) * tx_ring->count;
1993 memset(tx_ring->buffer_info, 0, size);
1995 /* Zero out the descriptor ring */
1997 memset(tx_ring->desc, 0, tx_ring->size);
1999 tx_ring->next_to_use = 0;
2000 tx_ring->next_to_clean = 0;
2001 tx_ring->last_tx_tso = 0;
2003 writel(0, hw->hw_addr + tx_ring->tdh);
2004 writel(0, hw->hw_addr + tx_ring->tdt);
2008 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2009 * @adapter: board private structure
2012 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2016 for (i = 0; i < adapter->num_tx_queues; i++)
2017 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2021 * e1000_free_rx_resources - Free Rx Resources
2022 * @adapter: board private structure
2023 * @rx_ring: ring to clean the resources from
2025 * Free all receive software resources
2028 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2029 struct e1000_rx_ring *rx_ring)
2031 struct pci_dev *pdev = adapter->pdev;
2033 e1000_clean_rx_ring(adapter, rx_ring);
2035 vfree(rx_ring->buffer_info);
2036 rx_ring->buffer_info = NULL;
2038 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2041 rx_ring->desc = NULL;
2045 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2046 * @adapter: board private structure
2048 * Free all receive software resources
2051 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2055 for (i = 0; i < adapter->num_rx_queues; i++)
2056 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2060 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2061 * @adapter: board private structure
2062 * @rx_ring: ring to free buffers from
2065 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2066 struct e1000_rx_ring *rx_ring)
2068 struct e1000_hw *hw = &adapter->hw;
2069 struct e1000_buffer *buffer_info;
2070 struct pci_dev *pdev = adapter->pdev;
2074 /* Free all the Rx ring sk_buffs */
2075 for (i = 0; i < rx_ring->count; i++) {
2076 buffer_info = &rx_ring->buffer_info[i];
2077 if (buffer_info->dma &&
2078 adapter->clean_rx == e1000_clean_rx_irq) {
2079 dma_unmap_single(&pdev->dev, buffer_info->dma,
2080 buffer_info->length,
2082 } else if (buffer_info->dma &&
2083 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2084 dma_unmap_page(&pdev->dev, buffer_info->dma,
2085 buffer_info->length,
2089 buffer_info->dma = 0;
2090 if (buffer_info->page) {
2091 put_page(buffer_info->page);
2092 buffer_info->page = NULL;
2094 if (buffer_info->skb) {
2095 dev_kfree_skb(buffer_info->skb);
2096 buffer_info->skb = NULL;
2100 /* there also may be some cached data from a chained receive */
2101 if (rx_ring->rx_skb_top) {
2102 dev_kfree_skb(rx_ring->rx_skb_top);
2103 rx_ring->rx_skb_top = NULL;
2106 size = sizeof(struct e1000_buffer) * rx_ring->count;
2107 memset(rx_ring->buffer_info, 0, size);
2109 /* Zero out the descriptor ring */
2110 memset(rx_ring->desc, 0, rx_ring->size);
2112 rx_ring->next_to_clean = 0;
2113 rx_ring->next_to_use = 0;
2115 writel(0, hw->hw_addr + rx_ring->rdh);
2116 writel(0, hw->hw_addr + rx_ring->rdt);
2120 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2121 * @adapter: board private structure
2124 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2128 for (i = 0; i < adapter->num_rx_queues; i++)
2129 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2132 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2133 * and memory write and invalidate disabled for certain operations
2135 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2137 struct e1000_hw *hw = &adapter->hw;
2138 struct net_device *netdev = adapter->netdev;
2141 e1000_pci_clear_mwi(hw);
2144 rctl |= E1000_RCTL_RST;
2146 E1000_WRITE_FLUSH();
2149 if (netif_running(netdev))
2150 e1000_clean_all_rx_rings(adapter);
2153 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2155 struct e1000_hw *hw = &adapter->hw;
2156 struct net_device *netdev = adapter->netdev;
2160 rctl &= ~E1000_RCTL_RST;
2162 E1000_WRITE_FLUSH();
2165 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2166 e1000_pci_set_mwi(hw);
2168 if (netif_running(netdev)) {
2169 /* No need to loop, because 82542 supports only 1 queue */
2170 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2171 e1000_configure_rx(adapter);
2172 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2177 * e1000_set_mac - Change the Ethernet Address of the NIC
2178 * @netdev: network interface device structure
2179 * @p: pointer to an address structure
2181 * Returns 0 on success, negative on failure
2184 static int e1000_set_mac(struct net_device *netdev, void *p)
2186 struct e1000_adapter *adapter = netdev_priv(netdev);
2187 struct e1000_hw *hw = &adapter->hw;
2188 struct sockaddr *addr = p;
2190 if (!is_valid_ether_addr(addr->sa_data))
2191 return -EADDRNOTAVAIL;
2193 /* 82542 2.0 needs to be in reset to write receive address registers */
2195 if (hw->mac_type == e1000_82542_rev2_0)
2196 e1000_enter_82542_rst(adapter);
2198 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2199 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2201 e1000_rar_set(hw, hw->mac_addr, 0);
2203 if (hw->mac_type == e1000_82542_rev2_0)
2204 e1000_leave_82542_rst(adapter);
2210 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2211 * @netdev: network interface device structure
2213 * The set_rx_mode entry point is called whenever the unicast or multicast
2214 * address lists or the network interface flags are updated. This routine is
2215 * responsible for configuring the hardware for proper unicast, multicast,
2216 * promiscuous mode, and all-multi behavior.
2219 static void e1000_set_rx_mode(struct net_device *netdev)
2221 struct e1000_adapter *adapter = netdev_priv(netdev);
2222 struct e1000_hw *hw = &adapter->hw;
2223 struct netdev_hw_addr *ha;
2224 bool use_uc = false;
2227 int i, rar_entries = E1000_RAR_ENTRIES;
2228 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2229 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2232 e_err(probe, "memory allocation failed\n");
2236 /* Check for Promiscuous and All Multicast modes */
2240 if (netdev->flags & IFF_PROMISC) {
2241 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2242 rctl &= ~E1000_RCTL_VFE;
2244 if (netdev->flags & IFF_ALLMULTI)
2245 rctl |= E1000_RCTL_MPE;
2247 rctl &= ~E1000_RCTL_MPE;
2248 /* Enable VLAN filter if there is a VLAN */
2249 if (e1000_vlan_used(adapter))
2250 rctl |= E1000_RCTL_VFE;
2253 if (netdev_uc_count(netdev) > rar_entries - 1) {
2254 rctl |= E1000_RCTL_UPE;
2255 } else if (!(netdev->flags & IFF_PROMISC)) {
2256 rctl &= ~E1000_RCTL_UPE;
2262 /* 82542 2.0 needs to be in reset to write receive address registers */
2264 if (hw->mac_type == e1000_82542_rev2_0)
2265 e1000_enter_82542_rst(adapter);
2267 /* load the first 14 addresses into the exact filters 1-14. Unicast
2268 * addresses take precedence to avoid disabling unicast filtering
2271 * RAR 0 is used for the station MAC address
2272 * if there are not 14 addresses, go ahead and clear the filters
2276 netdev_for_each_uc_addr(ha, netdev) {
2277 if (i == rar_entries)
2279 e1000_rar_set(hw, ha->addr, i++);
2282 netdev_for_each_mc_addr(ha, netdev) {
2283 if (i == rar_entries) {
2284 /* load any remaining addresses into the hash table */
2285 u32 hash_reg, hash_bit, mta;
2286 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2287 hash_reg = (hash_value >> 5) & 0x7F;
2288 hash_bit = hash_value & 0x1F;
2289 mta = (1 << hash_bit);
2290 mcarray[hash_reg] |= mta;
2292 e1000_rar_set(hw, ha->addr, i++);
2296 for (; i < rar_entries; i++) {
2297 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2298 E1000_WRITE_FLUSH();
2299 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2300 E1000_WRITE_FLUSH();
2303 /* write the hash table completely, write from bottom to avoid
2304 * both stupid write combining chipsets, and flushing each write */
2305 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2307 * If we are on an 82544 has an errata where writing odd
2308 * offsets overwrites the previous even offset, but writing
2309 * backwards over the range solves the issue by always
2310 * writing the odd offset first
2312 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2314 E1000_WRITE_FLUSH();
2316 if (hw->mac_type == e1000_82542_rev2_0)
2317 e1000_leave_82542_rst(adapter);
2323 * e1000_update_phy_info_task - get phy info
2324 * @work: work struct contained inside adapter struct
2326 * Need to wait a few seconds after link up to get diagnostic information from
2329 static void e1000_update_phy_info_task(struct work_struct *work)
2331 struct e1000_adapter *adapter = container_of(work,
2332 struct e1000_adapter,
2333 phy_info_task.work);
2335 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2340 * e1000_82547_tx_fifo_stall_task - task to complete work
2341 * @work: work struct contained inside adapter struct
2343 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2345 struct e1000_adapter *adapter = container_of(work,
2346 struct e1000_adapter,
2347 fifo_stall_task.work);
2348 struct e1000_hw *hw = &adapter->hw;
2349 struct net_device *netdev = adapter->netdev;
2353 if (atomic_read(&adapter->tx_fifo_stall)) {
2354 if ((er32(TDT) == er32(TDH)) &&
2355 (er32(TDFT) == er32(TDFH)) &&
2356 (er32(TDFTS) == er32(TDFHS))) {
2358 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2359 ew32(TDFT, adapter->tx_head_addr);
2360 ew32(TDFH, adapter->tx_head_addr);
2361 ew32(TDFTS, adapter->tx_head_addr);
2362 ew32(TDFHS, adapter->tx_head_addr);
2364 E1000_WRITE_FLUSH();
2366 adapter->tx_fifo_head = 0;
2367 atomic_set(&adapter->tx_fifo_stall, 0);
2368 netif_wake_queue(netdev);
2369 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2370 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2376 bool e1000_has_link(struct e1000_adapter *adapter)
2378 struct e1000_hw *hw = &adapter->hw;
2379 bool link_active = false;
2381 /* get_link_status is set on LSC (link status) interrupt or rx
2382 * sequence error interrupt (except on intel ce4100).
2383 * get_link_status will stay false until the
2384 * e1000_check_for_link establishes link for copper adapters
2387 switch (hw->media_type) {
2388 case e1000_media_type_copper:
2389 if (hw->mac_type == e1000_ce4100)
2390 hw->get_link_status = 1;
2391 if (hw->get_link_status) {
2392 e1000_check_for_link(hw);
2393 link_active = !hw->get_link_status;
2398 case e1000_media_type_fiber:
2399 e1000_check_for_link(hw);
2400 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2402 case e1000_media_type_internal_serdes:
2403 e1000_check_for_link(hw);
2404 link_active = hw->serdes_has_link;
2414 * e1000_watchdog - work function
2415 * @work: work struct contained inside adapter struct
2417 static void e1000_watchdog(struct work_struct *work)
2419 struct e1000_adapter *adapter = container_of(work,
2420 struct e1000_adapter,
2421 watchdog_task.work);
2422 struct e1000_hw *hw = &adapter->hw;
2423 struct net_device *netdev = adapter->netdev;
2424 struct e1000_tx_ring *txdr = adapter->tx_ring;
2427 link = e1000_has_link(adapter);
2428 if ((netif_carrier_ok(netdev)) && link)
2432 if (!netif_carrier_ok(netdev)) {
2435 /* update snapshot of PHY registers on LSC */
2436 e1000_get_speed_and_duplex(hw,
2437 &adapter->link_speed,
2438 &adapter->link_duplex);
2441 pr_info("%s NIC Link is Up %d Mbps %s, "
2442 "Flow Control: %s\n",
2444 adapter->link_speed,
2445 adapter->link_duplex == FULL_DUPLEX ?
2446 "Full Duplex" : "Half Duplex",
2447 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2448 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2449 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2450 E1000_CTRL_TFCE) ? "TX" : "None")));
2452 /* adjust timeout factor according to speed/duplex */
2453 adapter->tx_timeout_factor = 1;
2454 switch (adapter->link_speed) {
2457 adapter->tx_timeout_factor = 16;
2461 /* maybe add some timeout factor ? */
2465 /* enable transmits in the hardware */
2467 tctl |= E1000_TCTL_EN;
2470 netif_carrier_on(netdev);
2471 if (!test_bit(__E1000_DOWN, &adapter->flags))
2472 schedule_delayed_work(&adapter->phy_info_task,
2474 adapter->smartspeed = 0;
2477 if (netif_carrier_ok(netdev)) {
2478 adapter->link_speed = 0;
2479 adapter->link_duplex = 0;
2480 pr_info("%s NIC Link is Down\n",
2482 netif_carrier_off(netdev);
2484 if (!test_bit(__E1000_DOWN, &adapter->flags))
2485 schedule_delayed_work(&adapter->phy_info_task,
2489 e1000_smartspeed(adapter);
2493 e1000_update_stats(adapter);
2495 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2496 adapter->tpt_old = adapter->stats.tpt;
2497 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2498 adapter->colc_old = adapter->stats.colc;
2500 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2501 adapter->gorcl_old = adapter->stats.gorcl;
2502 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2503 adapter->gotcl_old = adapter->stats.gotcl;
2505 e1000_update_adaptive(hw);
2507 if (!netif_carrier_ok(netdev)) {
2508 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2509 /* We've lost link, so the controller stops DMA,
2510 * but we've got queued Tx work that's never going
2511 * to get done, so reset controller to flush Tx.
2512 * (Do the reset outside of interrupt context). */
2513 adapter->tx_timeout_count++;
2514 schedule_work(&adapter->reset_task);
2515 /* return immediately since reset is imminent */
2520 /* Simple mode for Interrupt Throttle Rate (ITR) */
2521 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2523 * Symmetric Tx/Rx gets a reduced ITR=2000;
2524 * Total asymmetrical Tx or Rx gets ITR=8000;
2525 * everyone else is between 2000-8000.
2527 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2528 u32 dif = (adapter->gotcl > adapter->gorcl ?
2529 adapter->gotcl - adapter->gorcl :
2530 adapter->gorcl - adapter->gotcl) / 10000;
2531 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2533 ew32(ITR, 1000000000 / (itr * 256));
2536 /* Cause software interrupt to ensure rx ring is cleaned */
2537 ew32(ICS, E1000_ICS_RXDMT0);
2539 /* Force detection of hung controller every watchdog period */
2540 adapter->detect_tx_hung = true;
2542 /* Reschedule the task */
2543 if (!test_bit(__E1000_DOWN, &adapter->flags))
2544 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2547 enum latency_range {
2551 latency_invalid = 255
2555 * e1000_update_itr - update the dynamic ITR value based on statistics
2556 * @adapter: pointer to adapter
2557 * @itr_setting: current adapter->itr
2558 * @packets: the number of packets during this measurement interval
2559 * @bytes: the number of bytes during this measurement interval
2561 * Stores a new ITR value based on packets and byte
2562 * counts during the last interrupt. The advantage of per interrupt
2563 * computation is faster updates and more accurate ITR for the current
2564 * traffic pattern. Constants in this function were computed
2565 * based on theoretical maximum wire speed and thresholds were set based
2566 * on testing data as well as attempting to minimize response time
2567 * while increasing bulk throughput.
2568 * this functionality is controlled by the InterruptThrottleRate module
2569 * parameter (see e1000_param.c)
2571 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2572 u16 itr_setting, int packets, int bytes)
2574 unsigned int retval = itr_setting;
2575 struct e1000_hw *hw = &adapter->hw;
2577 if (unlikely(hw->mac_type < e1000_82540))
2578 goto update_itr_done;
2581 goto update_itr_done;
2583 switch (itr_setting) {
2584 case lowest_latency:
2585 /* jumbo frames get bulk treatment*/
2586 if (bytes/packets > 8000)
2587 retval = bulk_latency;
2588 else if ((packets < 5) && (bytes > 512))
2589 retval = low_latency;
2591 case low_latency: /* 50 usec aka 20000 ints/s */
2592 if (bytes > 10000) {
2593 /* jumbo frames need bulk latency setting */
2594 if (bytes/packets > 8000)
2595 retval = bulk_latency;
2596 else if ((packets < 10) || ((bytes/packets) > 1200))
2597 retval = bulk_latency;
2598 else if ((packets > 35))
2599 retval = lowest_latency;
2600 } else if (bytes/packets > 2000)
2601 retval = bulk_latency;
2602 else if (packets <= 2 && bytes < 512)
2603 retval = lowest_latency;
2605 case bulk_latency: /* 250 usec aka 4000 ints/s */
2606 if (bytes > 25000) {
2608 retval = low_latency;
2609 } else if (bytes < 6000) {
2610 retval = low_latency;
2619 static void e1000_set_itr(struct e1000_adapter *adapter)
2621 struct e1000_hw *hw = &adapter->hw;
2623 u32 new_itr = adapter->itr;
2625 if (unlikely(hw->mac_type < e1000_82540))
2628 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2629 if (unlikely(adapter->link_speed != SPEED_1000)) {
2635 adapter->tx_itr = e1000_update_itr(adapter,
2637 adapter->total_tx_packets,
2638 adapter->total_tx_bytes);
2639 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2640 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2641 adapter->tx_itr = low_latency;
2643 adapter->rx_itr = e1000_update_itr(adapter,
2645 adapter->total_rx_packets,
2646 adapter->total_rx_bytes);
2647 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2648 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2649 adapter->rx_itr = low_latency;
2651 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2653 switch (current_itr) {
2654 /* counts and packets in update_itr are dependent on these numbers */
2655 case lowest_latency:
2659 new_itr = 20000; /* aka hwitr = ~200 */
2669 if (new_itr != adapter->itr) {
2670 /* this attempts to bias the interrupt rate towards Bulk
2671 * by adding intermediate steps when interrupt rate is
2673 new_itr = new_itr > adapter->itr ?
2674 min(adapter->itr + (new_itr >> 2), new_itr) :
2676 adapter->itr = new_itr;
2677 ew32(ITR, 1000000000 / (new_itr * 256));
2681 #define E1000_TX_FLAGS_CSUM 0x00000001
2682 #define E1000_TX_FLAGS_VLAN 0x00000002
2683 #define E1000_TX_FLAGS_TSO 0x00000004
2684 #define E1000_TX_FLAGS_IPV4 0x00000008
2685 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2686 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2688 static int e1000_tso(struct e1000_adapter *adapter,
2689 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2691 struct e1000_context_desc *context_desc;
2692 struct e1000_buffer *buffer_info;
2695 u16 ipcse = 0, tucse, mss;
2696 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2699 if (skb_is_gso(skb)) {
2700 if (skb_header_cloned(skb)) {
2701 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2706 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2707 mss = skb_shinfo(skb)->gso_size;
2708 if (skb->protocol == htons(ETH_P_IP)) {
2709 struct iphdr *iph = ip_hdr(skb);
2712 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2716 cmd_length = E1000_TXD_CMD_IP;
2717 ipcse = skb_transport_offset(skb) - 1;
2718 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2719 ipv6_hdr(skb)->payload_len = 0;
2720 tcp_hdr(skb)->check =
2721 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2722 &ipv6_hdr(skb)->daddr,
2726 ipcss = skb_network_offset(skb);
2727 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2728 tucss = skb_transport_offset(skb);
2729 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2732 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2733 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2735 i = tx_ring->next_to_use;
2736 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2737 buffer_info = &tx_ring->buffer_info[i];
2739 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2740 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2741 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2742 context_desc->upper_setup.tcp_fields.tucss = tucss;
2743 context_desc->upper_setup.tcp_fields.tucso = tucso;
2744 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2745 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2746 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2747 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2749 buffer_info->time_stamp = jiffies;
2750 buffer_info->next_to_watch = i;
2752 if (++i == tx_ring->count) i = 0;
2753 tx_ring->next_to_use = i;
2760 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2761 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2763 struct e1000_context_desc *context_desc;
2764 struct e1000_buffer *buffer_info;
2767 u32 cmd_len = E1000_TXD_CMD_DEXT;
2769 if (skb->ip_summed != CHECKSUM_PARTIAL)
2772 switch (skb->protocol) {
2773 case cpu_to_be16(ETH_P_IP):
2774 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2775 cmd_len |= E1000_TXD_CMD_TCP;
2777 case cpu_to_be16(ETH_P_IPV6):
2778 /* XXX not handling all IPV6 headers */
2779 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2780 cmd_len |= E1000_TXD_CMD_TCP;
2783 if (unlikely(net_ratelimit()))
2784 e_warn(drv, "checksum_partial proto=%x!\n",
2789 css = skb_checksum_start_offset(skb);
2791 i = tx_ring->next_to_use;
2792 buffer_info = &tx_ring->buffer_info[i];
2793 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2795 context_desc->lower_setup.ip_config = 0;
2796 context_desc->upper_setup.tcp_fields.tucss = css;
2797 context_desc->upper_setup.tcp_fields.tucso =
2798 css + skb->csum_offset;
2799 context_desc->upper_setup.tcp_fields.tucse = 0;
2800 context_desc->tcp_seg_setup.data = 0;
2801 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2803 buffer_info->time_stamp = jiffies;
2804 buffer_info->next_to_watch = i;
2806 if (unlikely(++i == tx_ring->count)) i = 0;
2807 tx_ring->next_to_use = i;
2812 #define E1000_MAX_TXD_PWR 12
2813 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2815 static int e1000_tx_map(struct e1000_adapter *adapter,
2816 struct e1000_tx_ring *tx_ring,
2817 struct sk_buff *skb, unsigned int first,
2818 unsigned int max_per_txd, unsigned int nr_frags,
2821 struct e1000_hw *hw = &adapter->hw;
2822 struct pci_dev *pdev = adapter->pdev;
2823 struct e1000_buffer *buffer_info;
2824 unsigned int len = skb_headlen(skb);
2825 unsigned int offset = 0, size, count = 0, i;
2826 unsigned int f, bytecount, segs;
2828 i = tx_ring->next_to_use;
2831 buffer_info = &tx_ring->buffer_info[i];
2832 size = min(len, max_per_txd);
2833 /* Workaround for Controller erratum --
2834 * descriptor for non-tso packet in a linear SKB that follows a
2835 * tso gets written back prematurely before the data is fully
2836 * DMA'd to the controller */
2837 if (!skb->data_len && tx_ring->last_tx_tso &&
2839 tx_ring->last_tx_tso = 0;
2843 /* Workaround for premature desc write-backs
2844 * in TSO mode. Append 4-byte sentinel desc */
2845 if (unlikely(mss && !nr_frags && size == len && size > 8))
2847 /* work-around for errata 10 and it applies
2848 * to all controllers in PCI-X mode
2849 * The fix is to make sure that the first descriptor of a
2850 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2852 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2853 (size > 2015) && count == 0))
2856 /* Workaround for potential 82544 hang in PCI-X. Avoid
2857 * terminating buffers within evenly-aligned dwords. */
2858 if (unlikely(adapter->pcix_82544 &&
2859 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2863 buffer_info->length = size;
2864 /* set time_stamp *before* dma to help avoid a possible race */
2865 buffer_info->time_stamp = jiffies;
2866 buffer_info->mapped_as_page = false;
2867 buffer_info->dma = dma_map_single(&pdev->dev,
2869 size, DMA_TO_DEVICE);
2870 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2872 buffer_info->next_to_watch = i;
2879 if (unlikely(i == tx_ring->count))
2884 for (f = 0; f < nr_frags; f++) {
2885 struct skb_frag_struct *frag;
2887 frag = &skb_shinfo(skb)->frags[f];
2892 unsigned long bufend;
2894 if (unlikely(i == tx_ring->count))
2897 buffer_info = &tx_ring->buffer_info[i];
2898 size = min(len, max_per_txd);
2899 /* Workaround for premature desc write-backs
2900 * in TSO mode. Append 4-byte sentinel desc */
2901 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2903 /* Workaround for potential 82544 hang in PCI-X.
2904 * Avoid terminating buffers within evenly-aligned
2906 bufend = (unsigned long)
2907 page_to_phys(skb_frag_page(frag));
2908 bufend += offset + size - 1;
2909 if (unlikely(adapter->pcix_82544 &&
2914 buffer_info->length = size;
2915 buffer_info->time_stamp = jiffies;
2916 buffer_info->mapped_as_page = true;
2917 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2918 offset, size, DMA_TO_DEVICE);
2919 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2921 buffer_info->next_to_watch = i;
2929 segs = skb_shinfo(skb)->gso_segs ?: 1;
2930 /* multiply data chunks by size of headers */
2931 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2933 tx_ring->buffer_info[i].skb = skb;
2934 tx_ring->buffer_info[i].segs = segs;
2935 tx_ring->buffer_info[i].bytecount = bytecount;
2936 tx_ring->buffer_info[first].next_to_watch = i;
2941 dev_err(&pdev->dev, "TX DMA map failed\n");
2942 buffer_info->dma = 0;
2948 i += tx_ring->count;
2950 buffer_info = &tx_ring->buffer_info[i];
2951 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2957 static void e1000_tx_queue(struct e1000_adapter *adapter,
2958 struct e1000_tx_ring *tx_ring, int tx_flags,
2961 struct e1000_hw *hw = &adapter->hw;
2962 struct e1000_tx_desc *tx_desc = NULL;
2963 struct e1000_buffer *buffer_info;
2964 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2967 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2968 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2970 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2972 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2973 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2976 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2977 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2978 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2981 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2982 txd_lower |= E1000_TXD_CMD_VLE;
2983 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2986 i = tx_ring->next_to_use;
2989 buffer_info = &tx_ring->buffer_info[i];
2990 tx_desc = E1000_TX_DESC(*tx_ring, i);
2991 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2992 tx_desc->lower.data =
2993 cpu_to_le32(txd_lower | buffer_info->length);
2994 tx_desc->upper.data = cpu_to_le32(txd_upper);
2995 if (unlikely(++i == tx_ring->count)) i = 0;
2998 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3000 /* Force memory writes to complete before letting h/w
3001 * know there are new descriptors to fetch. (Only
3002 * applicable for weak-ordered memory model archs,
3003 * such as IA-64). */
3006 tx_ring->next_to_use = i;
3007 writel(i, hw->hw_addr + tx_ring->tdt);
3008 /* we need this if more than one processor can write to our tail
3009 * at a time, it syncronizes IO on IA64/Altix systems */
3014 * 82547 workaround to avoid controller hang in half-duplex environment.
3015 * The workaround is to avoid queuing a large packet that would span
3016 * the internal Tx FIFO ring boundary by notifying the stack to resend
3017 * the packet at a later time. This gives the Tx FIFO an opportunity to
3018 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3019 * to the beginning of the Tx FIFO.
3022 #define E1000_FIFO_HDR 0x10
3023 #define E1000_82547_PAD_LEN 0x3E0
3025 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3026 struct sk_buff *skb)
3028 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3029 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3031 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3033 if (adapter->link_duplex != HALF_DUPLEX)
3034 goto no_fifo_stall_required;
3036 if (atomic_read(&adapter->tx_fifo_stall))
3039 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3040 atomic_set(&adapter->tx_fifo_stall, 1);
3044 no_fifo_stall_required:
3045 adapter->tx_fifo_head += skb_fifo_len;
3046 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3047 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3051 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3053 struct e1000_adapter *adapter = netdev_priv(netdev);
3054 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3056 netif_stop_queue(netdev);
3057 /* Herbert's original patch had:
3058 * smp_mb__after_netif_stop_queue();
3059 * but since that doesn't exist yet, just open code it. */
3062 /* We need to check again in a case another CPU has just
3063 * made room available. */
3064 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3068 netif_start_queue(netdev);
3069 ++adapter->restart_queue;
3073 static int e1000_maybe_stop_tx(struct net_device *netdev,
3074 struct e1000_tx_ring *tx_ring, int size)
3076 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3078 return __e1000_maybe_stop_tx(netdev, size);
3081 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3082 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3083 struct net_device *netdev)
3085 struct e1000_adapter *adapter = netdev_priv(netdev);
3086 struct e1000_hw *hw = &adapter->hw;
3087 struct e1000_tx_ring *tx_ring;
3088 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3089 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3090 unsigned int tx_flags = 0;
3091 unsigned int len = skb_headlen(skb);
3092 unsigned int nr_frags;
3098 /* This goes back to the question of how to logically map a tx queue
3099 * to a flow. Right now, performance is impacted slightly negatively
3100 * if using multiple tx queues. If the stack breaks away from a
3101 * single qdisc implementation, we can look at this again. */
3102 tx_ring = adapter->tx_ring;
3104 if (unlikely(skb->len <= 0)) {
3105 dev_kfree_skb_any(skb);
3106 return NETDEV_TX_OK;
3109 mss = skb_shinfo(skb)->gso_size;
3110 /* The controller does a simple calculation to
3111 * make sure there is enough room in the FIFO before
3112 * initiating the DMA for each buffer. The calc is:
3113 * 4 = ceil(buffer len/mss). To make sure we don't
3114 * overrun the FIFO, adjust the max buffer len if mss
3118 max_per_txd = min(mss << 2, max_per_txd);
3119 max_txd_pwr = fls(max_per_txd) - 1;
3121 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3122 if (skb->data_len && hdr_len == len) {
3123 switch (hw->mac_type) {
3124 unsigned int pull_size;
3126 /* Make sure we have room to chop off 4 bytes,
3127 * and that the end alignment will work out to
3128 * this hardware's requirements
3129 * NOTE: this is a TSO only workaround
3130 * if end byte alignment not correct move us
3131 * into the next dword */
3132 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3135 pull_size = min((unsigned int)4, skb->data_len);
3136 if (!__pskb_pull_tail(skb, pull_size)) {
3137 e_err(drv, "__pskb_pull_tail "
3139 dev_kfree_skb_any(skb);
3140 return NETDEV_TX_OK;
3142 len = skb_headlen(skb);
3151 /* reserve a descriptor for the offload context */
3152 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3156 /* Controller Erratum workaround */
3157 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3160 count += TXD_USE_COUNT(len, max_txd_pwr);
3162 if (adapter->pcix_82544)
3165 /* work-around for errata 10 and it applies to all controllers
3166 * in PCI-X mode, so add one more descriptor to the count
3168 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3172 nr_frags = skb_shinfo(skb)->nr_frags;
3173 for (f = 0; f < nr_frags; f++)
3174 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3176 if (adapter->pcix_82544)
3179 /* need: count + 2 desc gap to keep tail from touching
3180 * head, otherwise try next time */
3181 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3182 return NETDEV_TX_BUSY;
3184 if (unlikely((hw->mac_type == e1000_82547) &&
3185 (e1000_82547_fifo_workaround(adapter, skb)))) {
3186 netif_stop_queue(netdev);
3187 if (!test_bit(__E1000_DOWN, &adapter->flags))
3188 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3189 return NETDEV_TX_BUSY;
3192 if (vlan_tx_tag_present(skb)) {
3193 tx_flags |= E1000_TX_FLAGS_VLAN;
3194 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3197 first = tx_ring->next_to_use;
3199 tso = e1000_tso(adapter, tx_ring, skb);
3201 dev_kfree_skb_any(skb);
3202 return NETDEV_TX_OK;
3206 if (likely(hw->mac_type != e1000_82544))
3207 tx_ring->last_tx_tso = 1;
3208 tx_flags |= E1000_TX_FLAGS_TSO;
3209 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3210 tx_flags |= E1000_TX_FLAGS_CSUM;
3212 if (likely(skb->protocol == htons(ETH_P_IP)))
3213 tx_flags |= E1000_TX_FLAGS_IPV4;
3215 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3219 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3220 /* Make sure there is space in the ring for the next send. */
3221 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3224 dev_kfree_skb_any(skb);
3225 tx_ring->buffer_info[first].time_stamp = 0;
3226 tx_ring->next_to_use = first;
3229 return NETDEV_TX_OK;
3233 * e1000_tx_timeout - Respond to a Tx Hang
3234 * @netdev: network interface device structure
3237 static void e1000_tx_timeout(struct net_device *netdev)
3239 struct e1000_adapter *adapter = netdev_priv(netdev);
3241 /* Do the reset outside of interrupt context */
3242 adapter->tx_timeout_count++;
3243 schedule_work(&adapter->reset_task);
3246 static void e1000_reset_task(struct work_struct *work)
3248 struct e1000_adapter *adapter =
3249 container_of(work, struct e1000_adapter, reset_task);
3251 e1000_reinit_safe(adapter);
3255 * e1000_get_stats - Get System Network Statistics
3256 * @netdev: network interface device structure
3258 * Returns the address of the device statistics structure.
3259 * The statistics are actually updated from the watchdog.
3262 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3264 /* only return the current stats */
3265 return &netdev->stats;
3269 * e1000_change_mtu - Change the Maximum Transfer Unit
3270 * @netdev: network interface device structure
3271 * @new_mtu: new value for maximum frame size
3273 * Returns 0 on success, negative on failure
3276 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3278 struct e1000_adapter *adapter = netdev_priv(netdev);
3279 struct e1000_hw *hw = &adapter->hw;
3280 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3282 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3283 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3284 e_err(probe, "Invalid MTU setting\n");
3288 /* Adapter-specific max frame size limits. */
3289 switch (hw->mac_type) {
3290 case e1000_undefined ... e1000_82542_rev2_1:
3291 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3292 e_err(probe, "Jumbo Frames not supported.\n");
3297 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3301 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3303 /* e1000_down has a dependency on max_frame_size */
3304 hw->max_frame_size = max_frame;
3305 if (netif_running(netdev))
3306 e1000_down(adapter);
3308 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3309 * means we reserve 2 more, this pushes us to allocate from the next
3311 * i.e. RXBUFFER_2048 --> size-4096 slab
3312 * however with the new *_jumbo_rx* routines, jumbo receives will use
3313 * fragmented skbs */
3315 if (max_frame <= E1000_RXBUFFER_2048)
3316 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3318 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3319 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3320 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3321 adapter->rx_buffer_len = PAGE_SIZE;
3324 /* adjust allocation if LPE protects us, and we aren't using SBP */
3325 if (!hw->tbi_compatibility_on &&
3326 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3327 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3328 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3330 pr_info("%s changing MTU from %d to %d\n",
3331 netdev->name, netdev->mtu, new_mtu);
3332 netdev->mtu = new_mtu;
3334 if (netif_running(netdev))
3337 e1000_reset(adapter);
3339 clear_bit(__E1000_RESETTING, &adapter->flags);
3345 * e1000_update_stats - Update the board statistics counters
3346 * @adapter: board private structure
3349 void e1000_update_stats(struct e1000_adapter *adapter)
3351 struct net_device *netdev = adapter->netdev;
3352 struct e1000_hw *hw = &adapter->hw;
3353 struct pci_dev *pdev = adapter->pdev;
3354 unsigned long flags;
3357 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3360 * Prevent stats update while adapter is being reset, or if the pci
3361 * connection is down.
3363 if (adapter->link_speed == 0)
3365 if (pci_channel_offline(pdev))
3368 spin_lock_irqsave(&adapter->stats_lock, flags);
3370 /* these counters are modified from e1000_tbi_adjust_stats,
3371 * called from the interrupt context, so they must only
3372 * be written while holding adapter->stats_lock
3375 adapter->stats.crcerrs += er32(CRCERRS);
3376 adapter->stats.gprc += er32(GPRC);
3377 adapter->stats.gorcl += er32(GORCL);
3378 adapter->stats.gorch += er32(GORCH);
3379 adapter->stats.bprc += er32(BPRC);
3380 adapter->stats.mprc += er32(MPRC);
3381 adapter->stats.roc += er32(ROC);
3383 adapter->stats.prc64 += er32(PRC64);
3384 adapter->stats.prc127 += er32(PRC127);
3385 adapter->stats.prc255 += er32(PRC255);
3386 adapter->stats.prc511 += er32(PRC511);
3387 adapter->stats.prc1023 += er32(PRC1023);
3388 adapter->stats.prc1522 += er32(PRC1522);
3390 adapter->stats.symerrs += er32(SYMERRS);
3391 adapter->stats.mpc += er32(MPC);
3392 adapter->stats.scc += er32(SCC);
3393 adapter->stats.ecol += er32(ECOL);
3394 adapter->stats.mcc += er32(MCC);
3395 adapter->stats.latecol += er32(LATECOL);
3396 adapter->stats.dc += er32(DC);
3397 adapter->stats.sec += er32(SEC);
3398 adapter->stats.rlec += er32(RLEC);
3399 adapter->stats.xonrxc += er32(XONRXC);
3400 adapter->stats.xontxc += er32(XONTXC);
3401 adapter->stats.xoffrxc += er32(XOFFRXC);
3402 adapter->stats.xofftxc += er32(XOFFTXC);
3403 adapter->stats.fcruc += er32(FCRUC);
3404 adapter->stats.gptc += er32(GPTC);
3405 adapter->stats.gotcl += er32(GOTCL);
3406 adapter->stats.gotch += er32(GOTCH);
3407 adapter->stats.rnbc += er32(RNBC);
3408 adapter->stats.ruc += er32(RUC);
3409 adapter->stats.rfc += er32(RFC);
3410 adapter->stats.rjc += er32(RJC);
3411 adapter->stats.torl += er32(TORL);
3412 adapter->stats.torh += er32(TORH);
3413 adapter->stats.totl += er32(TOTL);
3414 adapter->stats.toth += er32(TOTH);
3415 adapter->stats.tpr += er32(TPR);
3417 adapter->stats.ptc64 += er32(PTC64);
3418 adapter->stats.ptc127 += er32(PTC127);
3419 adapter->stats.ptc255 += er32(PTC255);
3420 adapter->stats.ptc511 += er32(PTC511);
3421 adapter->stats.ptc1023 += er32(PTC1023);
3422 adapter->stats.ptc1522 += er32(PTC1522);
3424 adapter->stats.mptc += er32(MPTC);
3425 adapter->stats.bptc += er32(BPTC);
3427 /* used for adaptive IFS */
3429 hw->tx_packet_delta = er32(TPT);
3430 adapter->stats.tpt += hw->tx_packet_delta;
3431 hw->collision_delta = er32(COLC);
3432 adapter->stats.colc += hw->collision_delta;
3434 if (hw->mac_type >= e1000_82543) {
3435 adapter->stats.algnerrc += er32(ALGNERRC);
3436 adapter->stats.rxerrc += er32(RXERRC);
3437 adapter->stats.tncrs += er32(TNCRS);
3438 adapter->stats.cexterr += er32(CEXTERR);
3439 adapter->stats.tsctc += er32(TSCTC);
3440 adapter->stats.tsctfc += er32(TSCTFC);
3443 /* Fill out the OS statistics structure */
3444 netdev->stats.multicast = adapter->stats.mprc;
3445 netdev->stats.collisions = adapter->stats.colc;
3449 /* RLEC on some newer hardware can be incorrect so build
3450 * our own version based on RUC and ROC */
3451 netdev->stats.rx_errors = adapter->stats.rxerrc +
3452 adapter->stats.crcerrs + adapter->stats.algnerrc +
3453 adapter->stats.ruc + adapter->stats.roc +
3454 adapter->stats.cexterr;
3455 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3456 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3457 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3458 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3459 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3462 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3463 netdev->stats.tx_errors = adapter->stats.txerrc;
3464 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3465 netdev->stats.tx_window_errors = adapter->stats.latecol;
3466 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3467 if (hw->bad_tx_carr_stats_fd &&
3468 adapter->link_duplex == FULL_DUPLEX) {
3469 netdev->stats.tx_carrier_errors = 0;
3470 adapter->stats.tncrs = 0;
3473 /* Tx Dropped needs to be maintained elsewhere */
3476 if (hw->media_type == e1000_media_type_copper) {
3477 if ((adapter->link_speed == SPEED_1000) &&
3478 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3479 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3480 adapter->phy_stats.idle_errors += phy_tmp;
3483 if ((hw->mac_type <= e1000_82546) &&
3484 (hw->phy_type == e1000_phy_m88) &&
3485 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3486 adapter->phy_stats.receive_errors += phy_tmp;
3489 /* Management Stats */
3490 if (hw->has_smbus) {
3491 adapter->stats.mgptc += er32(MGTPTC);
3492 adapter->stats.mgprc += er32(MGTPRC);
3493 adapter->stats.mgpdc += er32(MGTPDC);
3496 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3500 * e1000_intr - Interrupt Handler
3501 * @irq: interrupt number
3502 * @data: pointer to a network interface device structure
3505 static irqreturn_t e1000_intr(int irq, void *data)
3507 struct net_device *netdev = data;
3508 struct e1000_adapter *adapter = netdev_priv(netdev);
3509 struct e1000_hw *hw = &adapter->hw;
3510 u32 icr = er32(ICR);
3512 if (unlikely((!icr)))
3513 return IRQ_NONE; /* Not our interrupt */
3516 * we might have caused the interrupt, but the above
3517 * read cleared it, and just in case the driver is
3518 * down there is nothing to do so return handled
3520 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3523 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3524 hw->get_link_status = 1;
3525 /* guard against interrupt when we're going down */
3526 if (!test_bit(__E1000_DOWN, &adapter->flags))
3527 schedule_delayed_work(&adapter->watchdog_task, 1);
3530 /* disable interrupts, without the synchronize_irq bit */
3532 E1000_WRITE_FLUSH();
3534 if (likely(napi_schedule_prep(&adapter->napi))) {
3535 adapter->total_tx_bytes = 0;
3536 adapter->total_tx_packets = 0;
3537 adapter->total_rx_bytes = 0;
3538 adapter->total_rx_packets = 0;
3539 __napi_schedule(&adapter->napi);
3541 /* this really should not happen! if it does it is basically a
3542 * bug, but not a hard error, so enable ints and continue */
3543 if (!test_bit(__E1000_DOWN, &adapter->flags))
3544 e1000_irq_enable(adapter);
3551 * e1000_clean - NAPI Rx polling callback
3552 * @adapter: board private structure
3554 static int e1000_clean(struct napi_struct *napi, int budget)
3556 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3557 int tx_clean_complete = 0, work_done = 0;
3559 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3561 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3563 if (!tx_clean_complete)
3566 /* If budget not fully consumed, exit the polling mode */
3567 if (work_done < budget) {
3568 if (likely(adapter->itr_setting & 3))
3569 e1000_set_itr(adapter);
3570 napi_complete(napi);
3571 if (!test_bit(__E1000_DOWN, &adapter->flags))
3572 e1000_irq_enable(adapter);
3579 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3580 * @adapter: board private structure
3582 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3583 struct e1000_tx_ring *tx_ring)
3585 struct e1000_hw *hw = &adapter->hw;
3586 struct net_device *netdev = adapter->netdev;
3587 struct e1000_tx_desc *tx_desc, *eop_desc;
3588 struct e1000_buffer *buffer_info;
3589 unsigned int i, eop;
3590 unsigned int count = 0;
3591 unsigned int total_tx_bytes=0, total_tx_packets=0;
3593 i = tx_ring->next_to_clean;
3594 eop = tx_ring->buffer_info[i].next_to_watch;
3595 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3597 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3598 (count < tx_ring->count)) {
3599 bool cleaned = false;
3600 rmb(); /* read buffer_info after eop_desc */
3601 for ( ; !cleaned; count++) {
3602 tx_desc = E1000_TX_DESC(*tx_ring, i);
3603 buffer_info = &tx_ring->buffer_info[i];
3604 cleaned = (i == eop);
3607 total_tx_packets += buffer_info->segs;
3608 total_tx_bytes += buffer_info->bytecount;
3610 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3611 tx_desc->upper.data = 0;
3613 if (unlikely(++i == tx_ring->count)) i = 0;
3616 eop = tx_ring->buffer_info[i].next_to_watch;
3617 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3620 tx_ring->next_to_clean = i;
3622 #define TX_WAKE_THRESHOLD 32
3623 if (unlikely(count && netif_carrier_ok(netdev) &&
3624 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3625 /* Make sure that anybody stopping the queue after this
3626 * sees the new next_to_clean.
3630 if (netif_queue_stopped(netdev) &&
3631 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3632 netif_wake_queue(netdev);
3633 ++adapter->restart_queue;
3637 if (adapter->detect_tx_hung) {
3638 /* Detect a transmit hang in hardware, this serializes the
3639 * check with the clearing of time_stamp and movement of i */
3640 adapter->detect_tx_hung = false;
3641 if (tx_ring->buffer_info[eop].time_stamp &&
3642 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3643 (adapter->tx_timeout_factor * HZ)) &&
3644 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3646 /* detected Tx unit hang */
3647 e_err(drv, "Detected Tx Unit Hang\n"
3651 " next_to_use <%x>\n"
3652 " next_to_clean <%x>\n"
3653 "buffer_info[next_to_clean]\n"
3654 " time_stamp <%lx>\n"
3655 " next_to_watch <%x>\n"
3657 " next_to_watch.status <%x>\n",
3658 (unsigned long)((tx_ring - adapter->tx_ring) /
3659 sizeof(struct e1000_tx_ring)),
3660 readl(hw->hw_addr + tx_ring->tdh),
3661 readl(hw->hw_addr + tx_ring->tdt),
3662 tx_ring->next_to_use,
3663 tx_ring->next_to_clean,
3664 tx_ring->buffer_info[eop].time_stamp,
3667 eop_desc->upper.fields.status);
3668 netif_stop_queue(netdev);
3671 adapter->total_tx_bytes += total_tx_bytes;
3672 adapter->total_tx_packets += total_tx_packets;
3673 netdev->stats.tx_bytes += total_tx_bytes;
3674 netdev->stats.tx_packets += total_tx_packets;
3675 return count < tx_ring->count;
3679 * e1000_rx_checksum - Receive Checksum Offload for 82543
3680 * @adapter: board private structure
3681 * @status_err: receive descriptor status and error fields
3682 * @csum: receive descriptor csum field
3683 * @sk_buff: socket buffer with received data
3686 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3687 u32 csum, struct sk_buff *skb)
3689 struct e1000_hw *hw = &adapter->hw;
3690 u16 status = (u16)status_err;
3691 u8 errors = (u8)(status_err >> 24);
3693 skb_checksum_none_assert(skb);
3695 /* 82543 or newer only */
3696 if (unlikely(hw->mac_type < e1000_82543)) return;
3697 /* Ignore Checksum bit is set */
3698 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3699 /* TCP/UDP checksum error bit is set */
3700 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3701 /* let the stack verify checksum errors */
3702 adapter->hw_csum_err++;
3705 /* TCP/UDP Checksum has not been calculated */
3706 if (!(status & E1000_RXD_STAT_TCPCS))
3709 /* It must be a TCP or UDP packet with a valid checksum */
3710 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3711 /* TCP checksum is good */
3712 skb->ip_summed = CHECKSUM_UNNECESSARY;
3714 adapter->hw_csum_good++;
3718 * e1000_consume_page - helper function
3720 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3725 skb->data_len += length;
3726 skb->truesize += length;
3730 * e1000_receive_skb - helper function to handle rx indications
3731 * @adapter: board private structure
3732 * @status: descriptor status field as written by hardware
3733 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3734 * @skb: pointer to sk_buff to be indicated to stack
3736 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3737 __le16 vlan, struct sk_buff *skb)
3739 skb->protocol = eth_type_trans(skb, adapter->netdev);
3741 if (status & E1000_RXD_STAT_VP) {
3742 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3744 __vlan_hwaccel_put_tag(skb, vid);
3746 napi_gro_receive(&adapter->napi, skb);
3750 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3751 * @adapter: board private structure
3752 * @rx_ring: ring to clean
3753 * @work_done: amount of napi work completed this call
3754 * @work_to_do: max amount of work allowed for this call to do
3756 * the return value indicates whether actual cleaning was done, there
3757 * is no guarantee that everything was cleaned
3759 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3760 struct e1000_rx_ring *rx_ring,
3761 int *work_done, int work_to_do)
3763 struct e1000_hw *hw = &adapter->hw;
3764 struct net_device *netdev = adapter->netdev;
3765 struct pci_dev *pdev = adapter->pdev;
3766 struct e1000_rx_desc *rx_desc, *next_rxd;
3767 struct e1000_buffer *buffer_info, *next_buffer;
3768 unsigned long irq_flags;
3771 int cleaned_count = 0;
3772 bool cleaned = false;
3773 unsigned int total_rx_bytes=0, total_rx_packets=0;
3775 i = rx_ring->next_to_clean;
3776 rx_desc = E1000_RX_DESC(*rx_ring, i);
3777 buffer_info = &rx_ring->buffer_info[i];
3779 while (rx_desc->status & E1000_RXD_STAT_DD) {
3780 struct sk_buff *skb;
3783 if (*work_done >= work_to_do)
3786 rmb(); /* read descriptor and rx_buffer_info after status DD */
3788 status = rx_desc->status;
3789 skb = buffer_info->skb;
3790 buffer_info->skb = NULL;
3792 if (++i == rx_ring->count) i = 0;
3793 next_rxd = E1000_RX_DESC(*rx_ring, i);
3796 next_buffer = &rx_ring->buffer_info[i];
3800 dma_unmap_page(&pdev->dev, buffer_info->dma,
3801 buffer_info->length, DMA_FROM_DEVICE);
3802 buffer_info->dma = 0;
3804 length = le16_to_cpu(rx_desc->length);
3806 /* errors is only valid for DD + EOP descriptors */
3807 if (unlikely((status & E1000_RXD_STAT_EOP) &&
3808 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
3809 u8 last_byte = *(skb->data + length - 1);
3810 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
3812 spin_lock_irqsave(&adapter->stats_lock,
3814 e1000_tbi_adjust_stats(hw, &adapter->stats,
3816 spin_unlock_irqrestore(&adapter->stats_lock,
3820 /* recycle both page and skb */
3821 buffer_info->skb = skb;
3822 /* an error means any chain goes out the window
3824 if (rx_ring->rx_skb_top)
3825 dev_kfree_skb(rx_ring->rx_skb_top);
3826 rx_ring->rx_skb_top = NULL;
3831 #define rxtop rx_ring->rx_skb_top
3832 if (!(status & E1000_RXD_STAT_EOP)) {
3833 /* this descriptor is only the beginning (or middle) */
3835 /* this is the beginning of a chain */
3837 skb_fill_page_desc(rxtop, 0, buffer_info->page,
3840 /* this is the middle of a chain */
3841 skb_fill_page_desc(rxtop,
3842 skb_shinfo(rxtop)->nr_frags,
3843 buffer_info->page, 0, length);
3844 /* re-use the skb, only consumed the page */
3845 buffer_info->skb = skb;
3847 e1000_consume_page(buffer_info, rxtop, length);
3851 /* end of the chain */
3852 skb_fill_page_desc(rxtop,
3853 skb_shinfo(rxtop)->nr_frags,
3854 buffer_info->page, 0, length);
3855 /* re-use the current skb, we only consumed the
3857 buffer_info->skb = skb;
3860 e1000_consume_page(buffer_info, skb, length);
3862 /* no chain, got EOP, this buf is the packet
3863 * copybreak to save the put_page/alloc_page */
3864 if (length <= copybreak &&
3865 skb_tailroom(skb) >= length) {
3867 vaddr = kmap_atomic(buffer_info->page,
3868 KM_SKB_DATA_SOFTIRQ);
3869 memcpy(skb_tail_pointer(skb), vaddr, length);
3870 kunmap_atomic(vaddr,
3871 KM_SKB_DATA_SOFTIRQ);
3872 /* re-use the page, so don't erase
3873 * buffer_info->page */
3874 skb_put(skb, length);
3876 skb_fill_page_desc(skb, 0,
3877 buffer_info->page, 0,
3879 e1000_consume_page(buffer_info, skb,
3885 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3886 e1000_rx_checksum(adapter,
3888 ((u32)(rx_desc->errors) << 24),
3889 le16_to_cpu(rx_desc->csum), skb);
3891 pskb_trim(skb, skb->len - 4);
3893 /* probably a little skewed due to removing CRC */
3894 total_rx_bytes += skb->len;
3897 /* eth type trans needs skb->data to point to something */
3898 if (!pskb_may_pull(skb, ETH_HLEN)) {
3899 e_err(drv, "pskb_may_pull failed.\n");
3904 e1000_receive_skb(adapter, status, rx_desc->special, skb);
3907 rx_desc->status = 0;
3909 /* return some buffers to hardware, one at a time is too slow */
3910 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3911 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3915 /* use prefetched values */
3917 buffer_info = next_buffer;
3919 rx_ring->next_to_clean = i;
3921 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3923 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3925 adapter->total_rx_packets += total_rx_packets;
3926 adapter->total_rx_bytes += total_rx_bytes;
3927 netdev->stats.rx_bytes += total_rx_bytes;
3928 netdev->stats.rx_packets += total_rx_packets;
3933 * this should improve performance for small packets with large amounts
3934 * of reassembly being done in the stack
3936 static void e1000_check_copybreak(struct net_device *netdev,
3937 struct e1000_buffer *buffer_info,
3938 u32 length, struct sk_buff **skb)
3940 struct sk_buff *new_skb;
3942 if (length > copybreak)
3945 new_skb = netdev_alloc_skb_ip_align(netdev, length);
3949 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
3950 (*skb)->data - NET_IP_ALIGN,
3951 length + NET_IP_ALIGN);
3952 /* save the skb in buffer_info as good */
3953 buffer_info->skb = *skb;
3958 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3959 * @adapter: board private structure
3960 * @rx_ring: ring to clean
3961 * @work_done: amount of napi work completed this call
3962 * @work_to_do: max amount of work allowed for this call to do
3964 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3965 struct e1000_rx_ring *rx_ring,
3966 int *work_done, int work_to_do)
3968 struct e1000_hw *hw = &adapter->hw;
3969 struct net_device *netdev = adapter->netdev;
3970 struct pci_dev *pdev = adapter->pdev;
3971 struct e1000_rx_desc *rx_desc, *next_rxd;
3972 struct e1000_buffer *buffer_info, *next_buffer;
3973 unsigned long flags;
3976 int cleaned_count = 0;
3977 bool cleaned = false;
3978 unsigned int total_rx_bytes=0, total_rx_packets=0;
3980 i = rx_ring->next_to_clean;
3981 rx_desc = E1000_RX_DESC(*rx_ring, i);
3982 buffer_info = &rx_ring->buffer_info[i];
3984 while (rx_desc->status & E1000_RXD_STAT_DD) {
3985 struct sk_buff *skb;
3988 if (*work_done >= work_to_do)
3991 rmb(); /* read descriptor and rx_buffer_info after status DD */
3993 status = rx_desc->status;
3994 skb = buffer_info->skb;
3995 buffer_info->skb = NULL;
3997 prefetch(skb->data - NET_IP_ALIGN);
3999 if (++i == rx_ring->count) i = 0;
4000 next_rxd = E1000_RX_DESC(*rx_ring, i);
4003 next_buffer = &rx_ring->buffer_info[i];
4007 dma_unmap_single(&pdev->dev, buffer_info->dma,
4008 buffer_info->length, DMA_FROM_DEVICE);
4009 buffer_info->dma = 0;
4011 length = le16_to_cpu(rx_desc->length);
4012 /* !EOP means multiple descriptors were used to store a single
4013 * packet, if thats the case we need to toss it. In fact, we
4014 * to toss every packet with the EOP bit clear and the next
4015 * frame that _does_ have the EOP bit set, as it is by
4016 * definition only a frame fragment
4018 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4019 adapter->discarding = true;
4021 if (adapter->discarding) {
4022 /* All receives must fit into a single buffer */
4023 e_dbg("Receive packet consumed multiple buffers\n");
4025 buffer_info->skb = skb;
4026 if (status & E1000_RXD_STAT_EOP)
4027 adapter->discarding = false;
4031 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4032 u8 last_byte = *(skb->data + length - 1);
4033 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4035 spin_lock_irqsave(&adapter->stats_lock, flags);
4036 e1000_tbi_adjust_stats(hw, &adapter->stats,
4038 spin_unlock_irqrestore(&adapter->stats_lock,
4043 buffer_info->skb = skb;
4048 /* adjust length to remove Ethernet CRC, this must be
4049 * done after the TBI_ACCEPT workaround above */
4052 /* probably a little skewed due to removing CRC */
4053 total_rx_bytes += length;
4056 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4058 skb_put(skb, length);
4060 /* Receive Checksum Offload */
4061 e1000_rx_checksum(adapter,
4063 ((u32)(rx_desc->errors) << 24),
4064 le16_to_cpu(rx_desc->csum), skb);
4066 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4069 rx_desc->status = 0;
4071 /* return some buffers to hardware, one at a time is too slow */
4072 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4073 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4077 /* use prefetched values */
4079 buffer_info = next_buffer;
4081 rx_ring->next_to_clean = i;
4083 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4085 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4087 adapter->total_rx_packets += total_rx_packets;
4088 adapter->total_rx_bytes += total_rx_bytes;
4089 netdev->stats.rx_bytes += total_rx_bytes;
4090 netdev->stats.rx_packets += total_rx_packets;
4095 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4096 * @adapter: address of board private structure
4097 * @rx_ring: pointer to receive ring structure
4098 * @cleaned_count: number of buffers to allocate this pass
4102 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4103 struct e1000_rx_ring *rx_ring, int cleaned_count)
4105 struct net_device *netdev = adapter->netdev;
4106 struct pci_dev *pdev = adapter->pdev;
4107 struct e1000_rx_desc *rx_desc;
4108 struct e1000_buffer *buffer_info;
4109 struct sk_buff *skb;
4111 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4113 i = rx_ring->next_to_use;
4114 buffer_info = &rx_ring->buffer_info[i];
4116 while (cleaned_count--) {
4117 skb = buffer_info->skb;
4123 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4124 if (unlikely(!skb)) {
4125 /* Better luck next round */
4126 adapter->alloc_rx_buff_failed++;
4130 /* Fix for errata 23, can't cross 64kB boundary */
4131 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4132 struct sk_buff *oldskb = skb;
4133 e_err(rx_err, "skb align check failed: %u bytes at "
4134 "%p\n", bufsz, skb->data);
4135 /* Try again, without freeing the previous */
4136 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4137 /* Failed allocation, critical failure */
4139 dev_kfree_skb(oldskb);
4140 adapter->alloc_rx_buff_failed++;
4144 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4147 dev_kfree_skb(oldskb);
4148 break; /* while (cleaned_count--) */
4151 /* Use new allocation */
4152 dev_kfree_skb(oldskb);
4154 buffer_info->skb = skb;
4155 buffer_info->length = adapter->rx_buffer_len;
4157 /* allocate a new page if necessary */
4158 if (!buffer_info->page) {
4159 buffer_info->page = alloc_page(GFP_ATOMIC);
4160 if (unlikely(!buffer_info->page)) {
4161 adapter->alloc_rx_buff_failed++;
4166 if (!buffer_info->dma) {
4167 buffer_info->dma = dma_map_page(&pdev->dev,
4168 buffer_info->page, 0,
4169 buffer_info->length,
4171 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4172 put_page(buffer_info->page);
4174 buffer_info->page = NULL;
4175 buffer_info->skb = NULL;
4176 buffer_info->dma = 0;
4177 adapter->alloc_rx_buff_failed++;
4178 break; /* while !buffer_info->skb */
4182 rx_desc = E1000_RX_DESC(*rx_ring, i);
4183 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4185 if (unlikely(++i == rx_ring->count))
4187 buffer_info = &rx_ring->buffer_info[i];
4190 if (likely(rx_ring->next_to_use != i)) {
4191 rx_ring->next_to_use = i;
4192 if (unlikely(i-- == 0))
4193 i = (rx_ring->count - 1);
4195 /* Force memory writes to complete before letting h/w
4196 * know there are new descriptors to fetch. (Only
4197 * applicable for weak-ordered memory model archs,
4198 * such as IA-64). */
4200 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4205 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4206 * @adapter: address of board private structure
4209 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4210 struct e1000_rx_ring *rx_ring,
4213 struct e1000_hw *hw = &adapter->hw;
4214 struct net_device *netdev = adapter->netdev;
4215 struct pci_dev *pdev = adapter->pdev;
4216 struct e1000_rx_desc *rx_desc;
4217 struct e1000_buffer *buffer_info;
4218 struct sk_buff *skb;
4220 unsigned int bufsz = adapter->rx_buffer_len;
4222 i = rx_ring->next_to_use;
4223 buffer_info = &rx_ring->buffer_info[i];
4225 while (cleaned_count--) {
4226 skb = buffer_info->skb;
4232 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4233 if (unlikely(!skb)) {
4234 /* Better luck next round */
4235 adapter->alloc_rx_buff_failed++;
4239 /* Fix for errata 23, can't cross 64kB boundary */
4240 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4241 struct sk_buff *oldskb = skb;
4242 e_err(rx_err, "skb align check failed: %u bytes at "
4243 "%p\n", bufsz, skb->data);
4244 /* Try again, without freeing the previous */
4245 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4246 /* Failed allocation, critical failure */
4248 dev_kfree_skb(oldskb);
4249 adapter->alloc_rx_buff_failed++;
4253 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4256 dev_kfree_skb(oldskb);
4257 adapter->alloc_rx_buff_failed++;
4258 break; /* while !buffer_info->skb */
4261 /* Use new allocation */
4262 dev_kfree_skb(oldskb);
4264 buffer_info->skb = skb;
4265 buffer_info->length = adapter->rx_buffer_len;
4267 buffer_info->dma = dma_map_single(&pdev->dev,
4269 buffer_info->length,
4271 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4273 buffer_info->skb = NULL;
4274 buffer_info->dma = 0;
4275 adapter->alloc_rx_buff_failed++;
4276 break; /* while !buffer_info->skb */
4280 * XXX if it was allocated cleanly it will never map to a
4284 /* Fix for errata 23, can't cross 64kB boundary */
4285 if (!e1000_check_64k_bound(adapter,
4286 (void *)(unsigned long)buffer_info->dma,
4287 adapter->rx_buffer_len)) {
4288 e_err(rx_err, "dma align check failed: %u bytes at "
4289 "%p\n", adapter->rx_buffer_len,
4290 (void *)(unsigned long)buffer_info->dma);
4292 buffer_info->skb = NULL;
4294 dma_unmap_single(&pdev->dev, buffer_info->dma,
4295 adapter->rx_buffer_len,
4297 buffer_info->dma = 0;
4299 adapter->alloc_rx_buff_failed++;
4300 break; /* while !buffer_info->skb */
4302 rx_desc = E1000_RX_DESC(*rx_ring, i);
4303 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4305 if (unlikely(++i == rx_ring->count))
4307 buffer_info = &rx_ring->buffer_info[i];
4310 if (likely(rx_ring->next_to_use != i)) {
4311 rx_ring->next_to_use = i;
4312 if (unlikely(i-- == 0))
4313 i = (rx_ring->count - 1);
4315 /* Force memory writes to complete before letting h/w
4316 * know there are new descriptors to fetch. (Only
4317 * applicable for weak-ordered memory model archs,
4318 * such as IA-64). */
4320 writel(i, hw->hw_addr + rx_ring->rdt);
4325 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4329 static void e1000_smartspeed(struct e1000_adapter *adapter)
4331 struct e1000_hw *hw = &adapter->hw;
4335 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4336 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4339 if (adapter->smartspeed == 0) {
4340 /* If Master/Slave config fault is asserted twice,
4341 * we assume back-to-back */
4342 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4343 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4344 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4345 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4346 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4347 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4348 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4349 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4351 adapter->smartspeed++;
4352 if (!e1000_phy_setup_autoneg(hw) &&
4353 !e1000_read_phy_reg(hw, PHY_CTRL,
4355 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4356 MII_CR_RESTART_AUTO_NEG);
4357 e1000_write_phy_reg(hw, PHY_CTRL,
4362 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4363 /* If still no link, perhaps using 2/3 pair cable */
4364 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4365 phy_ctrl |= CR_1000T_MS_ENABLE;
4366 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4367 if (!e1000_phy_setup_autoneg(hw) &&
4368 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4369 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4370 MII_CR_RESTART_AUTO_NEG);
4371 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4374 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4375 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4376 adapter->smartspeed = 0;
4386 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4392 return e1000_mii_ioctl(netdev, ifr, cmd);
4405 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4408 struct e1000_adapter *adapter = netdev_priv(netdev);
4409 struct e1000_hw *hw = &adapter->hw;
4410 struct mii_ioctl_data *data = if_mii(ifr);
4413 unsigned long flags;
4415 if (hw->media_type != e1000_media_type_copper)
4420 data->phy_id = hw->phy_addr;
4423 spin_lock_irqsave(&adapter->stats_lock, flags);
4424 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4426 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4429 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4432 if (data->reg_num & ~(0x1F))
4434 mii_reg = data->val_in;
4435 spin_lock_irqsave(&adapter->stats_lock, flags);
4436 if (e1000_write_phy_reg(hw, data->reg_num,
4438 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4441 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4442 if (hw->media_type == e1000_media_type_copper) {
4443 switch (data->reg_num) {
4445 if (mii_reg & MII_CR_POWER_DOWN)
4447 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4449 hw->autoneg_advertised = 0x2F;
4454 else if (mii_reg & 0x2000)
4458 retval = e1000_set_spd_dplx(
4466 if (netif_running(adapter->netdev))
4467 e1000_reinit_locked(adapter);
4469 e1000_reset(adapter);
4471 case M88E1000_PHY_SPEC_CTRL:
4472 case M88E1000_EXT_PHY_SPEC_CTRL:
4473 if (e1000_phy_reset(hw))
4478 switch (data->reg_num) {
4480 if (mii_reg & MII_CR_POWER_DOWN)
4482 if (netif_running(adapter->netdev))
4483 e1000_reinit_locked(adapter);
4485 e1000_reset(adapter);
4493 return E1000_SUCCESS;
4496 void e1000_pci_set_mwi(struct e1000_hw *hw)
4498 struct e1000_adapter *adapter = hw->back;
4499 int ret_val = pci_set_mwi(adapter->pdev);
4502 e_err(probe, "Error in setting MWI\n");
4505 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4507 struct e1000_adapter *adapter = hw->back;
4509 pci_clear_mwi(adapter->pdev);
4512 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4514 struct e1000_adapter *adapter = hw->back;
4515 return pcix_get_mmrbc(adapter->pdev);
4518 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4520 struct e1000_adapter *adapter = hw->back;
4521 pcix_set_mmrbc(adapter->pdev, mmrbc);
4524 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4529 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4533 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4538 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4541 struct e1000_hw *hw = &adapter->hw;
4544 if (!test_bit(__E1000_DOWN, &adapter->flags))
4545 e1000_irq_disable(adapter);
4548 /* enable VLAN receive filtering */
4550 rctl &= ~E1000_RCTL_CFIEN;
4551 if (!(adapter->netdev->flags & IFF_PROMISC))
4552 rctl |= E1000_RCTL_VFE;
4554 e1000_update_mng_vlan(adapter);
4556 /* disable VLAN receive filtering */
4558 rctl &= ~E1000_RCTL_VFE;
4562 if (!test_bit(__E1000_DOWN, &adapter->flags))
4563 e1000_irq_enable(adapter);
4566 static void e1000_vlan_mode(struct net_device *netdev, u32 features)
4568 struct e1000_adapter *adapter = netdev_priv(netdev);
4569 struct e1000_hw *hw = &adapter->hw;
4572 if (!test_bit(__E1000_DOWN, &adapter->flags))
4573 e1000_irq_disable(adapter);
4576 if (features & NETIF_F_HW_VLAN_RX) {
4577 /* enable VLAN tag insert/strip */
4578 ctrl |= E1000_CTRL_VME;
4580 /* disable VLAN tag insert/strip */
4581 ctrl &= ~E1000_CTRL_VME;
4585 if (!test_bit(__E1000_DOWN, &adapter->flags))
4586 e1000_irq_enable(adapter);
4589 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4591 struct e1000_adapter *adapter = netdev_priv(netdev);
4592 struct e1000_hw *hw = &adapter->hw;
4595 if ((hw->mng_cookie.status &
4596 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4597 (vid == adapter->mng_vlan_id))
4600 if (!e1000_vlan_used(adapter))
4601 e1000_vlan_filter_on_off(adapter, true);
4603 /* add VID to filter table */
4604 index = (vid >> 5) & 0x7F;
4605 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4606 vfta |= (1 << (vid & 0x1F));
4607 e1000_write_vfta(hw, index, vfta);
4609 set_bit(vid, adapter->active_vlans);
4612 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4614 struct e1000_adapter *adapter = netdev_priv(netdev);
4615 struct e1000_hw *hw = &adapter->hw;
4618 if (!test_bit(__E1000_DOWN, &adapter->flags))
4619 e1000_irq_disable(adapter);
4620 if (!test_bit(__E1000_DOWN, &adapter->flags))
4621 e1000_irq_enable(adapter);
4623 /* remove VID from filter table */
4624 index = (vid >> 5) & 0x7F;
4625 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4626 vfta &= ~(1 << (vid & 0x1F));
4627 e1000_write_vfta(hw, index, vfta);
4629 clear_bit(vid, adapter->active_vlans);
4631 if (!e1000_vlan_used(adapter))
4632 e1000_vlan_filter_on_off(adapter, false);
4635 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4639 if (!e1000_vlan_used(adapter))
4642 e1000_vlan_filter_on_off(adapter, true);
4643 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4644 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4647 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4649 struct e1000_hw *hw = &adapter->hw;
4653 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4654 * for the switch() below to work */
4655 if ((spd & 1) || (dplx & ~1))
4658 /* Fiber NICs only allow 1000 gbps Full duplex */
4659 if ((hw->media_type == e1000_media_type_fiber) &&
4660 spd != SPEED_1000 &&
4661 dplx != DUPLEX_FULL)
4664 switch (spd + dplx) {
4665 case SPEED_10 + DUPLEX_HALF:
4666 hw->forced_speed_duplex = e1000_10_half;
4668 case SPEED_10 + DUPLEX_FULL:
4669 hw->forced_speed_duplex = e1000_10_full;
4671 case SPEED_100 + DUPLEX_HALF:
4672 hw->forced_speed_duplex = e1000_100_half;
4674 case SPEED_100 + DUPLEX_FULL:
4675 hw->forced_speed_duplex = e1000_100_full;
4677 case SPEED_1000 + DUPLEX_FULL:
4679 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4681 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4688 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4692 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4694 struct net_device *netdev = pci_get_drvdata(pdev);
4695 struct e1000_adapter *adapter = netdev_priv(netdev);
4696 struct e1000_hw *hw = &adapter->hw;
4697 u32 ctrl, ctrl_ext, rctl, status;
4698 u32 wufc = adapter->wol;
4703 netif_device_detach(netdev);
4705 if (netif_running(netdev)) {
4706 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4707 e1000_down(adapter);
4711 retval = pci_save_state(pdev);
4716 status = er32(STATUS);
4717 if (status & E1000_STATUS_LU)
4718 wufc &= ~E1000_WUFC_LNKC;
4721 e1000_setup_rctl(adapter);
4722 e1000_set_rx_mode(netdev);
4724 /* turn on all-multi mode if wake on multicast is enabled */
4725 if (wufc & E1000_WUFC_MC) {
4727 rctl |= E1000_RCTL_MPE;
4731 if (hw->mac_type >= e1000_82540) {
4733 /* advertise wake from D3Cold */
4734 #define E1000_CTRL_ADVD3WUC 0x00100000
4735 /* phy power management enable */
4736 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4737 ctrl |= E1000_CTRL_ADVD3WUC |
4738 E1000_CTRL_EN_PHY_PWR_MGMT;
4742 if (hw->media_type == e1000_media_type_fiber ||
4743 hw->media_type == e1000_media_type_internal_serdes) {
4744 /* keep the laser running in D3 */
4745 ctrl_ext = er32(CTRL_EXT);
4746 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4747 ew32(CTRL_EXT, ctrl_ext);
4750 ew32(WUC, E1000_WUC_PME_EN);
4757 e1000_release_manageability(adapter);
4759 *enable_wake = !!wufc;
4761 /* make sure adapter isn't asleep if manageability is enabled */
4762 if (adapter->en_mng_pt)
4763 *enable_wake = true;
4765 if (netif_running(netdev))
4766 e1000_free_irq(adapter);
4768 pci_disable_device(pdev);
4774 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4779 retval = __e1000_shutdown(pdev, &wake);
4784 pci_prepare_to_sleep(pdev);
4786 pci_wake_from_d3(pdev, false);
4787 pci_set_power_state(pdev, PCI_D3hot);
4793 static int e1000_resume(struct pci_dev *pdev)
4795 struct net_device *netdev = pci_get_drvdata(pdev);
4796 struct e1000_adapter *adapter = netdev_priv(netdev);
4797 struct e1000_hw *hw = &adapter->hw;
4800 pci_set_power_state(pdev, PCI_D0);
4801 pci_restore_state(pdev);
4802 pci_save_state(pdev);
4804 if (adapter->need_ioport)
4805 err = pci_enable_device(pdev);
4807 err = pci_enable_device_mem(pdev);
4809 pr_err("Cannot enable PCI device from suspend\n");
4812 pci_set_master(pdev);
4814 pci_enable_wake(pdev, PCI_D3hot, 0);
4815 pci_enable_wake(pdev, PCI_D3cold, 0);
4817 if (netif_running(netdev)) {
4818 err = e1000_request_irq(adapter);
4823 e1000_power_up_phy(adapter);
4824 e1000_reset(adapter);
4827 e1000_init_manageability(adapter);
4829 if (netif_running(netdev))
4832 netif_device_attach(netdev);
4838 static void e1000_shutdown(struct pci_dev *pdev)
4842 __e1000_shutdown(pdev, &wake);
4844 if (system_state == SYSTEM_POWER_OFF) {
4845 pci_wake_from_d3(pdev, wake);
4846 pci_set_power_state(pdev, PCI_D3hot);
4850 #ifdef CONFIG_NET_POLL_CONTROLLER
4852 * Polling 'interrupt' - used by things like netconsole to send skbs
4853 * without having to re-enable interrupts. It's not called while
4854 * the interrupt routine is executing.
4856 static void e1000_netpoll(struct net_device *netdev)
4858 struct e1000_adapter *adapter = netdev_priv(netdev);
4860 disable_irq(adapter->pdev->irq);
4861 e1000_intr(adapter->pdev->irq, netdev);
4862 enable_irq(adapter->pdev->irq);
4867 * e1000_io_error_detected - called when PCI error is detected
4868 * @pdev: Pointer to PCI device
4869 * @state: The current pci connection state
4871 * This function is called after a PCI bus error affecting
4872 * this device has been detected.
4874 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4875 pci_channel_state_t state)
4877 struct net_device *netdev = pci_get_drvdata(pdev);
4878 struct e1000_adapter *adapter = netdev_priv(netdev);
4880 netif_device_detach(netdev);
4882 if (state == pci_channel_io_perm_failure)
4883 return PCI_ERS_RESULT_DISCONNECT;
4885 if (netif_running(netdev))
4886 e1000_down(adapter);
4887 pci_disable_device(pdev);
4889 /* Request a slot slot reset. */
4890 return PCI_ERS_RESULT_NEED_RESET;
4894 * e1000_io_slot_reset - called after the pci bus has been reset.
4895 * @pdev: Pointer to PCI device
4897 * Restart the card from scratch, as if from a cold-boot. Implementation
4898 * resembles the first-half of the e1000_resume routine.
4900 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4902 struct net_device *netdev = pci_get_drvdata(pdev);
4903 struct e1000_adapter *adapter = netdev_priv(netdev);
4904 struct e1000_hw *hw = &adapter->hw;
4907 if (adapter->need_ioport)
4908 err = pci_enable_device(pdev);
4910 err = pci_enable_device_mem(pdev);
4912 pr_err("Cannot re-enable PCI device after reset.\n");
4913 return PCI_ERS_RESULT_DISCONNECT;
4915 pci_set_master(pdev);
4917 pci_enable_wake(pdev, PCI_D3hot, 0);
4918 pci_enable_wake(pdev, PCI_D3cold, 0);
4920 e1000_reset(adapter);
4923 return PCI_ERS_RESULT_RECOVERED;
4927 * e1000_io_resume - called when traffic can start flowing again.
4928 * @pdev: Pointer to PCI device
4930 * This callback is called when the error recovery driver tells us that
4931 * its OK to resume normal operation. Implementation resembles the
4932 * second-half of the e1000_resume routine.
4934 static void e1000_io_resume(struct pci_dev *pdev)
4936 struct net_device *netdev = pci_get_drvdata(pdev);
4937 struct e1000_adapter *adapter = netdev_priv(netdev);
4939 e1000_init_manageability(adapter);
4941 if (netif_running(netdev)) {
4942 if (e1000_up(adapter)) {
4943 pr_info("can't bring device back up after reset\n");
4948 netif_device_attach(netdev);