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(unsigned long data);
135 static void e1000_update_phy_info_task(struct work_struct *work);
136 static void e1000_watchdog(unsigned long data);
137 static void e1000_82547_tx_fifo_stall(unsigned long data);
138 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
139 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
140 struct net_device *netdev);
141 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
142 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
143 static int e1000_set_mac(struct net_device *netdev, void *p);
144 static irqreturn_t e1000_intr(int irq, void *data);
145 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
146 struct e1000_tx_ring *tx_ring);
147 static int e1000_clean(struct napi_struct *napi, int budget);
148 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
149 struct e1000_rx_ring *rx_ring,
150 int *work_done, int work_to_do);
151 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
152 struct e1000_rx_ring *rx_ring,
153 int *work_done, int work_to_do);
154 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
155 struct e1000_rx_ring *rx_ring,
157 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
158 struct e1000_rx_ring *rx_ring,
160 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
161 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
163 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
164 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
165 static void e1000_tx_timeout(struct net_device *dev);
166 static void e1000_reset_task(struct work_struct *work);
167 static void e1000_smartspeed(struct e1000_adapter *adapter);
168 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
169 struct sk_buff *skb);
171 static bool e1000_vlan_used(struct e1000_adapter *adapter);
172 static void e1000_vlan_mode(struct net_device *netdev, u32 features);
173 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
174 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
175 static void e1000_restore_vlan(struct e1000_adapter *adapter);
178 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
179 static int e1000_resume(struct pci_dev *pdev);
181 static void e1000_shutdown(struct pci_dev *pdev);
183 #ifdef CONFIG_NET_POLL_CONTROLLER
184 /* for netdump / net console */
185 static void e1000_netpoll (struct net_device *netdev);
188 #define COPYBREAK_DEFAULT 256
189 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
190 module_param(copybreak, uint, 0644);
191 MODULE_PARM_DESC(copybreak,
192 "Maximum size of packet that is copied to a new buffer on receive");
194 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
195 pci_channel_state_t state);
196 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
197 static void e1000_io_resume(struct pci_dev *pdev);
199 static struct pci_error_handlers e1000_err_handler = {
200 .error_detected = e1000_io_error_detected,
201 .slot_reset = e1000_io_slot_reset,
202 .resume = e1000_io_resume,
205 static struct pci_driver e1000_driver = {
206 .name = e1000_driver_name,
207 .id_table = e1000_pci_tbl,
208 .probe = e1000_probe,
209 .remove = __devexit_p(e1000_remove),
211 /* Power Management Hooks */
212 .suspend = e1000_suspend,
213 .resume = e1000_resume,
215 .shutdown = e1000_shutdown,
216 .err_handler = &e1000_err_handler
219 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
220 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
221 MODULE_LICENSE("GPL");
222 MODULE_VERSION(DRV_VERSION);
224 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
225 module_param(debug, int, 0);
226 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
229 * e1000_get_hw_dev - return device
230 * used by hardware layer to print debugging information
233 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
235 struct e1000_adapter *adapter = hw->back;
236 return adapter->netdev;
240 * e1000_init_module - Driver Registration Routine
242 * e1000_init_module is the first routine called when the driver is
243 * loaded. All it does is register with the PCI subsystem.
246 static int __init e1000_init_module(void)
249 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
251 pr_info("%s\n", e1000_copyright);
253 ret = pci_register_driver(&e1000_driver);
254 if (copybreak != COPYBREAK_DEFAULT) {
256 pr_info("copybreak disabled\n");
258 pr_info("copybreak enabled for "
259 "packets <= %u bytes\n", copybreak);
264 module_init(e1000_init_module);
267 * e1000_exit_module - Driver Exit Cleanup Routine
269 * e1000_exit_module is called just before the driver is removed
273 static void __exit e1000_exit_module(void)
275 pci_unregister_driver(&e1000_driver);
278 module_exit(e1000_exit_module);
280 static int e1000_request_irq(struct e1000_adapter *adapter)
282 struct net_device *netdev = adapter->netdev;
283 irq_handler_t handler = e1000_intr;
284 int irq_flags = IRQF_SHARED;
287 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
290 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
296 static void e1000_free_irq(struct e1000_adapter *adapter)
298 struct net_device *netdev = adapter->netdev;
300 free_irq(adapter->pdev->irq, netdev);
304 * e1000_irq_disable - Mask off interrupt generation on the NIC
305 * @adapter: board private structure
308 static void e1000_irq_disable(struct e1000_adapter *adapter)
310 struct e1000_hw *hw = &adapter->hw;
314 synchronize_irq(adapter->pdev->irq);
318 * e1000_irq_enable - Enable default interrupt generation settings
319 * @adapter: board private structure
322 static void e1000_irq_enable(struct e1000_adapter *adapter)
324 struct e1000_hw *hw = &adapter->hw;
326 ew32(IMS, IMS_ENABLE_MASK);
330 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
332 struct e1000_hw *hw = &adapter->hw;
333 struct net_device *netdev = adapter->netdev;
334 u16 vid = hw->mng_cookie.vlan_id;
335 u16 old_vid = adapter->mng_vlan_id;
337 if (!e1000_vlan_used(adapter))
340 if (!test_bit(vid, adapter->active_vlans)) {
341 if (hw->mng_cookie.status &
342 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
343 e1000_vlan_rx_add_vid(netdev, vid);
344 adapter->mng_vlan_id = vid;
346 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
348 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
350 !test_bit(old_vid, adapter->active_vlans))
351 e1000_vlan_rx_kill_vid(netdev, old_vid);
353 adapter->mng_vlan_id = vid;
357 static void e1000_init_manageability(struct e1000_adapter *adapter)
359 struct e1000_hw *hw = &adapter->hw;
361 if (adapter->en_mng_pt) {
362 u32 manc = er32(MANC);
364 /* disable hardware interception of ARP */
365 manc &= ~(E1000_MANC_ARP_EN);
371 static void e1000_release_manageability(struct e1000_adapter *adapter)
373 struct e1000_hw *hw = &adapter->hw;
375 if (adapter->en_mng_pt) {
376 u32 manc = er32(MANC);
378 /* re-enable hardware interception of ARP */
379 manc |= E1000_MANC_ARP_EN;
386 * e1000_configure - configure the hardware for RX and TX
387 * @adapter = private board structure
389 static void e1000_configure(struct e1000_adapter *adapter)
391 struct net_device *netdev = adapter->netdev;
394 e1000_set_rx_mode(netdev);
396 e1000_restore_vlan(adapter);
397 e1000_init_manageability(adapter);
399 e1000_configure_tx(adapter);
400 e1000_setup_rctl(adapter);
401 e1000_configure_rx(adapter);
402 /* call E1000_DESC_UNUSED which always leaves
403 * at least 1 descriptor unused to make sure
404 * next_to_use != next_to_clean */
405 for (i = 0; i < adapter->num_rx_queues; i++) {
406 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
407 adapter->alloc_rx_buf(adapter, ring,
408 E1000_DESC_UNUSED(ring));
412 int e1000_up(struct e1000_adapter *adapter)
414 struct e1000_hw *hw = &adapter->hw;
416 /* hardware has been reset, we need to reload some things */
417 e1000_configure(adapter);
419 clear_bit(__E1000_DOWN, &adapter->flags);
421 napi_enable(&adapter->napi);
423 e1000_irq_enable(adapter);
425 netif_wake_queue(adapter->netdev);
427 /* fire a link change interrupt to start the watchdog */
428 ew32(ICS, E1000_ICS_LSC);
433 * e1000_power_up_phy - restore link in case the phy was powered down
434 * @adapter: address of board private structure
436 * The phy may be powered down to save power and turn off link when the
437 * driver is unloaded and wake on lan is not enabled (among others)
438 * *** this routine MUST be followed by a call to e1000_reset ***
442 void e1000_power_up_phy(struct e1000_adapter *adapter)
444 struct e1000_hw *hw = &adapter->hw;
447 /* Just clear the power down bit to wake the phy back up */
448 if (hw->media_type == e1000_media_type_copper) {
449 /* according to the manual, the phy will retain its
450 * settings across a power-down/up cycle */
451 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
452 mii_reg &= ~MII_CR_POWER_DOWN;
453 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
457 static void e1000_power_down_phy(struct e1000_adapter *adapter)
459 struct e1000_hw *hw = &adapter->hw;
461 /* Power down the PHY so no link is implied when interface is down *
462 * The PHY cannot be powered down if any of the following is true *
465 * (c) SoL/IDER session is active */
466 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
467 hw->media_type == e1000_media_type_copper) {
470 switch (hw->mac_type) {
473 case e1000_82545_rev_3:
476 case e1000_82546_rev_3:
478 case e1000_82541_rev_2:
480 case e1000_82547_rev_2:
481 if (er32(MANC) & E1000_MANC_SMBUS_EN)
487 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
488 mii_reg |= MII_CR_POWER_DOWN;
489 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
496 void e1000_down(struct e1000_adapter *adapter)
498 struct e1000_hw *hw = &adapter->hw;
499 struct net_device *netdev = adapter->netdev;
503 /* disable receives in the hardware */
505 ew32(RCTL, rctl & ~E1000_RCTL_EN);
506 /* flush and sleep below */
508 netif_tx_disable(netdev);
510 /* disable transmits in the hardware */
512 tctl &= ~E1000_TCTL_EN;
514 /* flush both disables and wait for them to finish */
518 napi_disable(&adapter->napi);
520 e1000_irq_disable(adapter);
523 * Setting DOWN must be after irq_disable to prevent
524 * a screaming interrupt. Setting DOWN also prevents
525 * timers and tasks from rescheduling.
527 set_bit(__E1000_DOWN, &adapter->flags);
529 del_timer_sync(&adapter->tx_fifo_stall_timer);
530 del_timer_sync(&adapter->watchdog_timer);
531 del_timer_sync(&adapter->phy_info_timer);
533 adapter->link_speed = 0;
534 adapter->link_duplex = 0;
535 netif_carrier_off(netdev);
537 e1000_reset(adapter);
538 e1000_clean_all_tx_rings(adapter);
539 e1000_clean_all_rx_rings(adapter);
542 static void e1000_reinit_safe(struct e1000_adapter *adapter)
544 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
550 clear_bit(__E1000_RESETTING, &adapter->flags);
553 void e1000_reinit_locked(struct e1000_adapter *adapter)
555 /* if rtnl_lock is not held the call path is bogus */
557 WARN_ON(in_interrupt());
558 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
562 clear_bit(__E1000_RESETTING, &adapter->flags);
565 void e1000_reset(struct e1000_adapter *adapter)
567 struct e1000_hw *hw = &adapter->hw;
568 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
569 bool legacy_pba_adjust = false;
572 /* Repartition Pba for greater than 9k mtu
573 * To take effect CTRL.RST is required.
576 switch (hw->mac_type) {
577 case e1000_82542_rev2_0:
578 case e1000_82542_rev2_1:
583 case e1000_82541_rev_2:
584 legacy_pba_adjust = true;
588 case e1000_82545_rev_3:
591 case e1000_82546_rev_3:
595 case e1000_82547_rev_2:
596 legacy_pba_adjust = true;
599 case e1000_undefined:
604 if (legacy_pba_adjust) {
605 if (hw->max_frame_size > E1000_RXBUFFER_8192)
606 pba -= 8; /* allocate more FIFO for Tx */
608 if (hw->mac_type == e1000_82547) {
609 adapter->tx_fifo_head = 0;
610 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
611 adapter->tx_fifo_size =
612 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
613 atomic_set(&adapter->tx_fifo_stall, 0);
615 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
616 /* adjust PBA for jumbo frames */
619 /* To maintain wire speed transmits, the Tx FIFO should be
620 * large enough to accommodate two full transmit packets,
621 * rounded up to the next 1KB and expressed in KB. Likewise,
622 * the Rx FIFO should be large enough to accommodate at least
623 * one full receive packet and is similarly rounded up and
624 * expressed in KB. */
626 /* upper 16 bits has Tx packet buffer allocation size in KB */
627 tx_space = pba >> 16;
628 /* lower 16 bits has Rx packet buffer allocation size in KB */
631 * the tx fifo also stores 16 bytes of information about the tx
632 * but don't include ethernet FCS because hardware appends it
634 min_tx_space = (hw->max_frame_size +
635 sizeof(struct e1000_tx_desc) -
637 min_tx_space = ALIGN(min_tx_space, 1024);
639 /* software strips receive CRC, so leave room for it */
640 min_rx_space = hw->max_frame_size;
641 min_rx_space = ALIGN(min_rx_space, 1024);
644 /* If current Tx allocation is less than the min Tx FIFO size,
645 * and the min Tx FIFO size is less than the current Rx FIFO
646 * allocation, take space away from current Rx allocation */
647 if (tx_space < min_tx_space &&
648 ((min_tx_space - tx_space) < pba)) {
649 pba = pba - (min_tx_space - tx_space);
651 /* PCI/PCIx hardware has PBA alignment constraints */
652 switch (hw->mac_type) {
653 case e1000_82545 ... e1000_82546_rev_3:
654 pba &= ~(E1000_PBA_8K - 1);
660 /* if short on rx space, rx wins and must trump tx
661 * adjustment or use Early Receive if available */
662 if (pba < min_rx_space)
670 * flow control settings:
671 * The high water mark must be low enough to fit one full frame
672 * (or the size used for early receive) above it in the Rx FIFO.
673 * Set it to the lower of:
674 * - 90% of the Rx FIFO size, and
675 * - the full Rx FIFO size minus the early receive size (for parts
676 * with ERT support assuming ERT set to E1000_ERT_2048), or
677 * - the full Rx FIFO size minus one full frame
679 hwm = min(((pba << 10) * 9 / 10),
680 ((pba << 10) - hw->max_frame_size));
682 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
683 hw->fc_low_water = hw->fc_high_water - 8;
684 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
686 hw->fc = hw->original_fc;
688 /* Allow time for pending master requests to run */
690 if (hw->mac_type >= e1000_82544)
693 if (e1000_init_hw(hw))
694 e_dev_err("Hardware Error\n");
695 e1000_update_mng_vlan(adapter);
697 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
698 if (hw->mac_type >= e1000_82544 &&
700 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
701 u32 ctrl = er32(CTRL);
702 /* clear phy power management bit if we are in gig only mode,
703 * which if enabled will attempt negotiation to 100Mb, which
704 * can cause a loss of link at power off or driver unload */
705 ctrl &= ~E1000_CTRL_SWDPIN3;
709 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
710 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
712 e1000_reset_adaptive(hw);
713 e1000_phy_get_info(hw, &adapter->phy_info);
715 e1000_release_manageability(adapter);
719 * Dump the eeprom for users having checksum issues
721 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
723 struct net_device *netdev = adapter->netdev;
724 struct ethtool_eeprom eeprom;
725 const struct ethtool_ops *ops = netdev->ethtool_ops;
728 u16 csum_old, csum_new = 0;
730 eeprom.len = ops->get_eeprom_len(netdev);
733 data = kmalloc(eeprom.len, GFP_KERNEL);
735 pr_err("Unable to allocate memory to dump EEPROM data\n");
739 ops->get_eeprom(netdev, &eeprom, data);
741 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
742 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
743 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
744 csum_new += data[i] + (data[i + 1] << 8);
745 csum_new = EEPROM_SUM - csum_new;
747 pr_err("/*********************/\n");
748 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
749 pr_err("Calculated : 0x%04x\n", csum_new);
751 pr_err("Offset Values\n");
752 pr_err("======== ======\n");
753 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
755 pr_err("Include this output when contacting your support provider.\n");
756 pr_err("This is not a software error! Something bad happened to\n");
757 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
758 pr_err("result in further problems, possibly loss of data,\n");
759 pr_err("corruption or system hangs!\n");
760 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
761 pr_err("which is invalid and requires you to set the proper MAC\n");
762 pr_err("address manually before continuing to enable this network\n");
763 pr_err("device. Please inspect the EEPROM dump and report the\n");
764 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
765 pr_err("/*********************/\n");
771 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
772 * @pdev: PCI device information struct
774 * Return true if an adapter needs ioport resources
776 static int e1000_is_need_ioport(struct pci_dev *pdev)
778 switch (pdev->device) {
779 case E1000_DEV_ID_82540EM:
780 case E1000_DEV_ID_82540EM_LOM:
781 case E1000_DEV_ID_82540EP:
782 case E1000_DEV_ID_82540EP_LOM:
783 case E1000_DEV_ID_82540EP_LP:
784 case E1000_DEV_ID_82541EI:
785 case E1000_DEV_ID_82541EI_MOBILE:
786 case E1000_DEV_ID_82541ER:
787 case E1000_DEV_ID_82541ER_LOM:
788 case E1000_DEV_ID_82541GI:
789 case E1000_DEV_ID_82541GI_LF:
790 case E1000_DEV_ID_82541GI_MOBILE:
791 case E1000_DEV_ID_82544EI_COPPER:
792 case E1000_DEV_ID_82544EI_FIBER:
793 case E1000_DEV_ID_82544GC_COPPER:
794 case E1000_DEV_ID_82544GC_LOM:
795 case E1000_DEV_ID_82545EM_COPPER:
796 case E1000_DEV_ID_82545EM_FIBER:
797 case E1000_DEV_ID_82546EB_COPPER:
798 case E1000_DEV_ID_82546EB_FIBER:
799 case E1000_DEV_ID_82546EB_QUAD_COPPER:
806 static u32 e1000_fix_features(struct net_device *netdev, u32 features)
809 * Since there is no support for separate rx/tx vlan accel
810 * enable/disable make sure tx flag is always in same state as rx.
812 if (features & NETIF_F_HW_VLAN_RX)
813 features |= NETIF_F_HW_VLAN_TX;
815 features &= ~NETIF_F_HW_VLAN_TX;
820 static int e1000_set_features(struct net_device *netdev, u32 features)
822 struct e1000_adapter *adapter = netdev_priv(netdev);
823 u32 changed = features ^ netdev->features;
825 if (changed & NETIF_F_HW_VLAN_RX)
826 e1000_vlan_mode(netdev, features);
828 if (!(changed & NETIF_F_RXCSUM))
831 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
833 if (netif_running(netdev))
834 e1000_reinit_locked(adapter);
836 e1000_reset(adapter);
841 static const struct net_device_ops e1000_netdev_ops = {
842 .ndo_open = e1000_open,
843 .ndo_stop = e1000_close,
844 .ndo_start_xmit = e1000_xmit_frame,
845 .ndo_get_stats = e1000_get_stats,
846 .ndo_set_rx_mode = e1000_set_rx_mode,
847 .ndo_set_mac_address = e1000_set_mac,
848 .ndo_tx_timeout = e1000_tx_timeout,
849 .ndo_change_mtu = e1000_change_mtu,
850 .ndo_do_ioctl = e1000_ioctl,
851 .ndo_validate_addr = eth_validate_addr,
852 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
853 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
854 #ifdef CONFIG_NET_POLL_CONTROLLER
855 .ndo_poll_controller = e1000_netpoll,
857 .ndo_fix_features = e1000_fix_features,
858 .ndo_set_features = e1000_set_features,
862 * e1000_init_hw_struct - initialize members of hw struct
863 * @adapter: board private struct
864 * @hw: structure used by e1000_hw.c
866 * Factors out initialization of the e1000_hw struct to its own function
867 * that can be called very early at init (just after struct allocation).
868 * Fields are initialized based on PCI device information and
869 * OS network device settings (MTU size).
870 * Returns negative error codes if MAC type setup fails.
872 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
875 struct pci_dev *pdev = adapter->pdev;
877 /* PCI config space info */
878 hw->vendor_id = pdev->vendor;
879 hw->device_id = pdev->device;
880 hw->subsystem_vendor_id = pdev->subsystem_vendor;
881 hw->subsystem_id = pdev->subsystem_device;
882 hw->revision_id = pdev->revision;
884 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
886 hw->max_frame_size = adapter->netdev->mtu +
887 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
888 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
890 /* identify the MAC */
891 if (e1000_set_mac_type(hw)) {
892 e_err(probe, "Unknown MAC Type\n");
896 switch (hw->mac_type) {
901 case e1000_82541_rev_2:
902 case e1000_82547_rev_2:
903 hw->phy_init_script = 1;
907 e1000_set_media_type(hw);
908 e1000_get_bus_info(hw);
910 hw->wait_autoneg_complete = false;
911 hw->tbi_compatibility_en = true;
912 hw->adaptive_ifs = true;
916 if (hw->media_type == e1000_media_type_copper) {
917 hw->mdix = AUTO_ALL_MODES;
918 hw->disable_polarity_correction = false;
919 hw->master_slave = E1000_MASTER_SLAVE;
926 * e1000_probe - Device Initialization Routine
927 * @pdev: PCI device information struct
928 * @ent: entry in e1000_pci_tbl
930 * Returns 0 on success, negative on failure
932 * e1000_probe initializes an adapter identified by a pci_dev structure.
933 * The OS initialization, configuring of the adapter private structure,
934 * and a hardware reset occur.
936 static int __devinit e1000_probe(struct pci_dev *pdev,
937 const struct pci_device_id *ent)
939 struct net_device *netdev;
940 struct e1000_adapter *adapter;
943 static int cards_found = 0;
944 static int global_quad_port_a = 0; /* global ksp3 port a indication */
945 int i, err, pci_using_dac;
948 u16 eeprom_apme_mask = E1000_EEPROM_APME;
949 int bars, need_ioport;
951 /* do not allocate ioport bars when not needed */
952 need_ioport = e1000_is_need_ioport(pdev);
954 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
955 err = pci_enable_device(pdev);
957 bars = pci_select_bars(pdev, IORESOURCE_MEM);
958 err = pci_enable_device_mem(pdev);
963 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
967 pci_set_master(pdev);
968 err = pci_save_state(pdev);
970 goto err_alloc_etherdev;
973 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
975 goto err_alloc_etherdev;
977 SET_NETDEV_DEV(netdev, &pdev->dev);
979 pci_set_drvdata(pdev, netdev);
980 adapter = netdev_priv(netdev);
981 adapter->netdev = netdev;
982 adapter->pdev = pdev;
983 adapter->msg_enable = (1 << debug) - 1;
984 adapter->bars = bars;
985 adapter->need_ioport = need_ioport;
991 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
995 if (adapter->need_ioport) {
996 for (i = BAR_1; i <= BAR_5; i++) {
997 if (pci_resource_len(pdev, i) == 0)
999 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1000 hw->io_base = pci_resource_start(pdev, i);
1006 /* make ready for any if (hw->...) below */
1007 err = e1000_init_hw_struct(adapter, hw);
1012 * there is a workaround being applied below that limits
1013 * 64-bit DMA addresses to 64-bit hardware. There are some
1014 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1017 if ((hw->bus_type == e1000_bus_type_pcix) &&
1018 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1020 * according to DMA-API-HOWTO, coherent calls will always
1021 * succeed if the set call did
1023 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1026 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1028 pr_err("No usable DMA config, aborting\n");
1031 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1034 netdev->netdev_ops = &e1000_netdev_ops;
1035 e1000_set_ethtool_ops(netdev);
1036 netdev->watchdog_timeo = 5 * HZ;
1037 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1039 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1041 adapter->bd_number = cards_found;
1043 /* setup the private structure */
1045 err = e1000_sw_init(adapter);
1050 if (hw->mac_type == e1000_ce4100) {
1051 ce4100_gbe_mdio_base_phy = pci_resource_start(pdev, BAR_1);
1052 ce4100_gbe_mdio_base_virt = ioremap(ce4100_gbe_mdio_base_phy,
1053 pci_resource_len(pdev, BAR_1));
1055 if (!ce4100_gbe_mdio_base_virt)
1056 goto err_mdio_ioremap;
1059 if (hw->mac_type >= e1000_82543) {
1060 netdev->hw_features = NETIF_F_SG |
1063 netdev->features = NETIF_F_HW_VLAN_TX |
1064 NETIF_F_HW_VLAN_FILTER;
1067 if ((hw->mac_type >= e1000_82544) &&
1068 (hw->mac_type != e1000_82547))
1069 netdev->hw_features |= NETIF_F_TSO;
1071 netdev->features |= netdev->hw_features;
1072 netdev->hw_features |= NETIF_F_RXCSUM;
1074 if (pci_using_dac) {
1075 netdev->features |= NETIF_F_HIGHDMA;
1076 netdev->vlan_features |= NETIF_F_HIGHDMA;
1079 netdev->vlan_features |= NETIF_F_TSO;
1080 netdev->vlan_features |= NETIF_F_HW_CSUM;
1081 netdev->vlan_features |= NETIF_F_SG;
1083 netdev->priv_flags |= IFF_UNICAST_FLT;
1085 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1087 /* initialize eeprom parameters */
1088 if (e1000_init_eeprom_params(hw)) {
1089 e_err(probe, "EEPROM initialization failed\n");
1093 /* before reading the EEPROM, reset the controller to
1094 * put the device in a known good starting state */
1098 /* make sure the EEPROM is good */
1099 if (e1000_validate_eeprom_checksum(hw) < 0) {
1100 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1101 e1000_dump_eeprom(adapter);
1103 * set MAC address to all zeroes to invalidate and temporary
1104 * disable this device for the user. This blocks regular
1105 * traffic while still permitting ethtool ioctls from reaching
1106 * the hardware as well as allowing the user to run the
1107 * interface after manually setting a hw addr using
1110 memset(hw->mac_addr, 0, netdev->addr_len);
1112 /* copy the MAC address out of the EEPROM */
1113 if (e1000_read_mac_addr(hw))
1114 e_err(probe, "EEPROM Read Error\n");
1116 /* don't block initalization here due to bad MAC address */
1117 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1118 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1120 if (!is_valid_ether_addr(netdev->perm_addr))
1121 e_err(probe, "Invalid MAC Address\n");
1123 init_timer(&adapter->tx_fifo_stall_timer);
1124 adapter->tx_fifo_stall_timer.function = e1000_82547_tx_fifo_stall;
1125 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter;
1127 init_timer(&adapter->watchdog_timer);
1128 adapter->watchdog_timer.function = e1000_watchdog;
1129 adapter->watchdog_timer.data = (unsigned long) adapter;
1131 init_timer(&adapter->phy_info_timer);
1132 adapter->phy_info_timer.function = e1000_update_phy_info;
1133 adapter->phy_info_timer.data = (unsigned long)adapter;
1135 INIT_WORK(&adapter->fifo_stall_task, e1000_82547_tx_fifo_stall_task);
1136 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1137 INIT_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1139 e1000_check_options(adapter);
1141 /* Initial Wake on LAN setting
1142 * If APM wake is enabled in the EEPROM,
1143 * enable the ACPI Magic Packet filter
1146 switch (hw->mac_type) {
1147 case e1000_82542_rev2_0:
1148 case e1000_82542_rev2_1:
1152 e1000_read_eeprom(hw,
1153 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1154 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1157 case e1000_82546_rev_3:
1158 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1159 e1000_read_eeprom(hw,
1160 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1165 e1000_read_eeprom(hw,
1166 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1169 if (eeprom_data & eeprom_apme_mask)
1170 adapter->eeprom_wol |= E1000_WUFC_MAG;
1172 /* now that we have the eeprom settings, apply the special cases
1173 * where the eeprom may be wrong or the board simply won't support
1174 * wake on lan on a particular port */
1175 switch (pdev->device) {
1176 case E1000_DEV_ID_82546GB_PCIE:
1177 adapter->eeprom_wol = 0;
1179 case E1000_DEV_ID_82546EB_FIBER:
1180 case E1000_DEV_ID_82546GB_FIBER:
1181 /* Wake events only supported on port A for dual fiber
1182 * regardless of eeprom setting */
1183 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1184 adapter->eeprom_wol = 0;
1186 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1187 /* if quad port adapter, disable WoL on all but port A */
1188 if (global_quad_port_a != 0)
1189 adapter->eeprom_wol = 0;
1191 adapter->quad_port_a = 1;
1192 /* Reset for multiple quad port adapters */
1193 if (++global_quad_port_a == 4)
1194 global_quad_port_a = 0;
1198 /* initialize the wol settings based on the eeprom settings */
1199 adapter->wol = adapter->eeprom_wol;
1200 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1202 /* Auto detect PHY address */
1203 if (hw->mac_type == e1000_ce4100) {
1204 for (i = 0; i < 32; i++) {
1206 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1207 if (tmp == 0 || tmp == 0xFF) {
1216 /* reset the hardware with the new settings */
1217 e1000_reset(adapter);
1219 strcpy(netdev->name, "eth%d");
1220 err = register_netdev(netdev);
1224 e1000_vlan_mode(netdev, netdev->features);
1226 /* print bus type/speed/width info */
1227 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1228 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1229 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1230 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1231 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1232 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1233 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1236 /* carrier off reporting is important to ethtool even BEFORE open */
1237 netif_carrier_off(netdev);
1239 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1246 e1000_phy_hw_reset(hw);
1248 if (hw->flash_address)
1249 iounmap(hw->flash_address);
1250 kfree(adapter->tx_ring);
1251 kfree(adapter->rx_ring);
1255 iounmap(ce4100_gbe_mdio_base_virt);
1256 iounmap(hw->hw_addr);
1258 free_netdev(netdev);
1260 pci_release_selected_regions(pdev, bars);
1262 pci_disable_device(pdev);
1267 * e1000_remove - Device Removal Routine
1268 * @pdev: PCI device information struct
1270 * e1000_remove is called by the PCI subsystem to alert the driver
1271 * that it should release a PCI device. The could be caused by a
1272 * Hot-Plug event, or because the driver is going to be removed from
1276 static void __devexit e1000_remove(struct pci_dev *pdev)
1278 struct net_device *netdev = pci_get_drvdata(pdev);
1279 struct e1000_adapter *adapter = netdev_priv(netdev);
1280 struct e1000_hw *hw = &adapter->hw;
1282 set_bit(__E1000_DOWN, &adapter->flags);
1283 del_timer_sync(&adapter->tx_fifo_stall_timer);
1284 del_timer_sync(&adapter->watchdog_timer);
1285 del_timer_sync(&adapter->phy_info_timer);
1287 cancel_work_sync(&adapter->reset_task);
1289 e1000_release_manageability(adapter);
1291 unregister_netdev(netdev);
1293 e1000_phy_hw_reset(hw);
1295 kfree(adapter->tx_ring);
1296 kfree(adapter->rx_ring);
1298 iounmap(hw->hw_addr);
1299 if (hw->flash_address)
1300 iounmap(hw->flash_address);
1301 pci_release_selected_regions(pdev, adapter->bars);
1303 free_netdev(netdev);
1305 pci_disable_device(pdev);
1309 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1310 * @adapter: board private structure to initialize
1312 * e1000_sw_init initializes the Adapter private data structure.
1313 * e1000_init_hw_struct MUST be called before this function
1316 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1318 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1320 adapter->num_tx_queues = 1;
1321 adapter->num_rx_queues = 1;
1323 if (e1000_alloc_queues(adapter)) {
1324 e_err(probe, "Unable to allocate memory for queues\n");
1328 /* Explicitly disable IRQ since the NIC can be in any state. */
1329 e1000_irq_disable(adapter);
1331 spin_lock_init(&adapter->stats_lock);
1333 set_bit(__E1000_DOWN, &adapter->flags);
1339 * e1000_alloc_queues - Allocate memory for all rings
1340 * @adapter: board private structure to initialize
1342 * We allocate one ring per queue at run-time since we don't know the
1343 * number of queues at compile-time.
1346 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1348 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1349 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1350 if (!adapter->tx_ring)
1353 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1354 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1355 if (!adapter->rx_ring) {
1356 kfree(adapter->tx_ring);
1360 return E1000_SUCCESS;
1364 * e1000_open - Called when a network interface is made active
1365 * @netdev: network interface device structure
1367 * Returns 0 on success, negative value on failure
1369 * The open entry point is called when a network interface is made
1370 * active by the system (IFF_UP). At this point all resources needed
1371 * for transmit and receive operations are allocated, the interrupt
1372 * handler is registered with the OS, the watchdog timer is started,
1373 * and the stack is notified that the interface is ready.
1376 static int e1000_open(struct net_device *netdev)
1378 struct e1000_adapter *adapter = netdev_priv(netdev);
1379 struct e1000_hw *hw = &adapter->hw;
1382 /* disallow open during test */
1383 if (test_bit(__E1000_TESTING, &adapter->flags))
1386 netif_carrier_off(netdev);
1388 /* allocate transmit descriptors */
1389 err = e1000_setup_all_tx_resources(adapter);
1393 /* allocate receive descriptors */
1394 err = e1000_setup_all_rx_resources(adapter);
1398 e1000_power_up_phy(adapter);
1400 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1401 if ((hw->mng_cookie.status &
1402 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1403 e1000_update_mng_vlan(adapter);
1406 /* before we allocate an interrupt, we must be ready to handle it.
1407 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1408 * as soon as we call pci_request_irq, so we have to setup our
1409 * clean_rx handler before we do so. */
1410 e1000_configure(adapter);
1412 err = e1000_request_irq(adapter);
1416 /* From here on the code is the same as e1000_up() */
1417 clear_bit(__E1000_DOWN, &adapter->flags);
1419 napi_enable(&adapter->napi);
1421 e1000_irq_enable(adapter);
1423 netif_start_queue(netdev);
1425 /* fire a link status change interrupt to start the watchdog */
1426 ew32(ICS, E1000_ICS_LSC);
1428 return E1000_SUCCESS;
1431 e1000_power_down_phy(adapter);
1432 e1000_free_all_rx_resources(adapter);
1434 e1000_free_all_tx_resources(adapter);
1436 e1000_reset(adapter);
1442 * e1000_close - Disables a network interface
1443 * @netdev: network interface device structure
1445 * Returns 0, this is not allowed to fail
1447 * The close entry point is called when an interface is de-activated
1448 * by the OS. The hardware is still under the drivers control, but
1449 * needs to be disabled. A global MAC reset is issued to stop the
1450 * hardware, and all transmit and receive resources are freed.
1453 static int e1000_close(struct net_device *netdev)
1455 struct e1000_adapter *adapter = netdev_priv(netdev);
1456 struct e1000_hw *hw = &adapter->hw;
1458 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1459 e1000_down(adapter);
1460 e1000_power_down_phy(adapter);
1461 e1000_free_irq(adapter);
1463 e1000_free_all_tx_resources(adapter);
1464 e1000_free_all_rx_resources(adapter);
1466 /* kill manageability vlan ID if supported, but not if a vlan with
1467 * the same ID is registered on the host OS (let 8021q kill it) */
1468 if ((hw->mng_cookie.status &
1469 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1470 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1471 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1478 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1479 * @adapter: address of board private structure
1480 * @start: address of beginning of memory
1481 * @len: length of memory
1483 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1486 struct e1000_hw *hw = &adapter->hw;
1487 unsigned long begin = (unsigned long)start;
1488 unsigned long end = begin + len;
1490 /* First rev 82545 and 82546 need to not allow any memory
1491 * write location to cross 64k boundary due to errata 23 */
1492 if (hw->mac_type == e1000_82545 ||
1493 hw->mac_type == e1000_ce4100 ||
1494 hw->mac_type == e1000_82546) {
1495 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1502 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1503 * @adapter: board private structure
1504 * @txdr: tx descriptor ring (for a specific queue) to setup
1506 * Return 0 on success, negative on failure
1509 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1510 struct e1000_tx_ring *txdr)
1512 struct pci_dev *pdev = adapter->pdev;
1515 size = sizeof(struct e1000_buffer) * txdr->count;
1516 txdr->buffer_info = vzalloc(size);
1517 if (!txdr->buffer_info) {
1518 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1523 /* round up to nearest 4K */
1525 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1526 txdr->size = ALIGN(txdr->size, 4096);
1528 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1532 vfree(txdr->buffer_info);
1533 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1538 /* Fix for errata 23, can't cross 64kB boundary */
1539 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1540 void *olddesc = txdr->desc;
1541 dma_addr_t olddma = txdr->dma;
1542 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1543 txdr->size, txdr->desc);
1544 /* Try again, without freeing the previous */
1545 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1546 &txdr->dma, GFP_KERNEL);
1547 /* Failed allocation, critical failure */
1549 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1551 goto setup_tx_desc_die;
1554 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1556 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1558 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1560 e_err(probe, "Unable to allocate aligned memory "
1561 "for the transmit descriptor ring\n");
1562 vfree(txdr->buffer_info);
1565 /* Free old allocation, new allocation was successful */
1566 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1570 memset(txdr->desc, 0, txdr->size);
1572 txdr->next_to_use = 0;
1573 txdr->next_to_clean = 0;
1579 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1580 * (Descriptors) for all queues
1581 * @adapter: board private structure
1583 * Return 0 on success, negative on failure
1586 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1590 for (i = 0; i < adapter->num_tx_queues; i++) {
1591 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1593 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1594 for (i-- ; i >= 0; i--)
1595 e1000_free_tx_resources(adapter,
1596 &adapter->tx_ring[i]);
1605 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1606 * @adapter: board private structure
1608 * Configure the Tx unit of the MAC after a reset.
1611 static void e1000_configure_tx(struct e1000_adapter *adapter)
1614 struct e1000_hw *hw = &adapter->hw;
1615 u32 tdlen, tctl, tipg;
1618 /* Setup the HW Tx Head and Tail descriptor pointers */
1620 switch (adapter->num_tx_queues) {
1623 tdba = adapter->tx_ring[0].dma;
1624 tdlen = adapter->tx_ring[0].count *
1625 sizeof(struct e1000_tx_desc);
1627 ew32(TDBAH, (tdba >> 32));
1628 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1631 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1632 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1636 /* Set the default values for the Tx Inter Packet Gap timer */
1637 if ((hw->media_type == e1000_media_type_fiber ||
1638 hw->media_type == e1000_media_type_internal_serdes))
1639 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1641 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1643 switch (hw->mac_type) {
1644 case e1000_82542_rev2_0:
1645 case e1000_82542_rev2_1:
1646 tipg = DEFAULT_82542_TIPG_IPGT;
1647 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1648 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1651 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1652 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1655 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1656 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1659 /* Set the Tx Interrupt Delay register */
1661 ew32(TIDV, adapter->tx_int_delay);
1662 if (hw->mac_type >= e1000_82540)
1663 ew32(TADV, adapter->tx_abs_int_delay);
1665 /* Program the Transmit Control Register */
1668 tctl &= ~E1000_TCTL_CT;
1669 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1670 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1672 e1000_config_collision_dist(hw);
1674 /* Setup Transmit Descriptor Settings for eop descriptor */
1675 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1677 /* only set IDE if we are delaying interrupts using the timers */
1678 if (adapter->tx_int_delay)
1679 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1681 if (hw->mac_type < e1000_82543)
1682 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1684 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1686 /* Cache if we're 82544 running in PCI-X because we'll
1687 * need this to apply a workaround later in the send path. */
1688 if (hw->mac_type == e1000_82544 &&
1689 hw->bus_type == e1000_bus_type_pcix)
1690 adapter->pcix_82544 = 1;
1697 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1698 * @adapter: board private structure
1699 * @rxdr: rx descriptor ring (for a specific queue) to setup
1701 * Returns 0 on success, negative on failure
1704 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1705 struct e1000_rx_ring *rxdr)
1707 struct pci_dev *pdev = adapter->pdev;
1710 size = sizeof(struct e1000_buffer) * rxdr->count;
1711 rxdr->buffer_info = vzalloc(size);
1712 if (!rxdr->buffer_info) {
1713 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1718 desc_len = sizeof(struct e1000_rx_desc);
1720 /* Round up to nearest 4K */
1722 rxdr->size = rxdr->count * desc_len;
1723 rxdr->size = ALIGN(rxdr->size, 4096);
1725 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1729 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1732 vfree(rxdr->buffer_info);
1736 /* Fix for errata 23, can't cross 64kB boundary */
1737 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1738 void *olddesc = rxdr->desc;
1739 dma_addr_t olddma = rxdr->dma;
1740 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1741 rxdr->size, rxdr->desc);
1742 /* Try again, without freeing the previous */
1743 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1744 &rxdr->dma, GFP_KERNEL);
1745 /* Failed allocation, critical failure */
1747 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1749 e_err(probe, "Unable to allocate memory for the Rx "
1750 "descriptor ring\n");
1751 goto setup_rx_desc_die;
1754 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1756 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1758 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1760 e_err(probe, "Unable to allocate aligned memory for "
1761 "the Rx descriptor ring\n");
1762 goto setup_rx_desc_die;
1764 /* Free old allocation, new allocation was successful */
1765 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1769 memset(rxdr->desc, 0, rxdr->size);
1771 rxdr->next_to_clean = 0;
1772 rxdr->next_to_use = 0;
1773 rxdr->rx_skb_top = NULL;
1779 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1780 * (Descriptors) for all queues
1781 * @adapter: board private structure
1783 * Return 0 on success, negative on failure
1786 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1790 for (i = 0; i < adapter->num_rx_queues; i++) {
1791 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1793 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1794 for (i-- ; i >= 0; i--)
1795 e1000_free_rx_resources(adapter,
1796 &adapter->rx_ring[i]);
1805 * e1000_setup_rctl - configure the receive control registers
1806 * @adapter: Board private structure
1808 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1810 struct e1000_hw *hw = &adapter->hw;
1815 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1817 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1818 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1819 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1821 if (hw->tbi_compatibility_on == 1)
1822 rctl |= E1000_RCTL_SBP;
1824 rctl &= ~E1000_RCTL_SBP;
1826 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1827 rctl &= ~E1000_RCTL_LPE;
1829 rctl |= E1000_RCTL_LPE;
1831 /* Setup buffer sizes */
1832 rctl &= ~E1000_RCTL_SZ_4096;
1833 rctl |= E1000_RCTL_BSEX;
1834 switch (adapter->rx_buffer_len) {
1835 case E1000_RXBUFFER_2048:
1837 rctl |= E1000_RCTL_SZ_2048;
1838 rctl &= ~E1000_RCTL_BSEX;
1840 case E1000_RXBUFFER_4096:
1841 rctl |= E1000_RCTL_SZ_4096;
1843 case E1000_RXBUFFER_8192:
1844 rctl |= E1000_RCTL_SZ_8192;
1846 case E1000_RXBUFFER_16384:
1847 rctl |= E1000_RCTL_SZ_16384;
1855 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1856 * @adapter: board private structure
1858 * Configure the Rx unit of the MAC after a reset.
1861 static void e1000_configure_rx(struct e1000_adapter *adapter)
1864 struct e1000_hw *hw = &adapter->hw;
1865 u32 rdlen, rctl, rxcsum;
1867 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1868 rdlen = adapter->rx_ring[0].count *
1869 sizeof(struct e1000_rx_desc);
1870 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1871 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1873 rdlen = adapter->rx_ring[0].count *
1874 sizeof(struct e1000_rx_desc);
1875 adapter->clean_rx = e1000_clean_rx_irq;
1876 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1879 /* disable receives while setting up the descriptors */
1881 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1883 /* set the Receive Delay Timer Register */
1884 ew32(RDTR, adapter->rx_int_delay);
1886 if (hw->mac_type >= e1000_82540) {
1887 ew32(RADV, adapter->rx_abs_int_delay);
1888 if (adapter->itr_setting != 0)
1889 ew32(ITR, 1000000000 / (adapter->itr * 256));
1892 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1893 * the Base and Length of the Rx Descriptor Ring */
1894 switch (adapter->num_rx_queues) {
1897 rdba = adapter->rx_ring[0].dma;
1899 ew32(RDBAH, (rdba >> 32));
1900 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1903 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1904 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1908 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1909 if (hw->mac_type >= e1000_82543) {
1910 rxcsum = er32(RXCSUM);
1911 if (adapter->rx_csum)
1912 rxcsum |= E1000_RXCSUM_TUOFL;
1914 /* don't need to clear IPPCSE as it defaults to 0 */
1915 rxcsum &= ~E1000_RXCSUM_TUOFL;
1916 ew32(RXCSUM, rxcsum);
1919 /* Enable Receives */
1924 * e1000_free_tx_resources - Free Tx Resources per Queue
1925 * @adapter: board private structure
1926 * @tx_ring: Tx descriptor ring for a specific queue
1928 * Free all transmit software resources
1931 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1932 struct e1000_tx_ring *tx_ring)
1934 struct pci_dev *pdev = adapter->pdev;
1936 e1000_clean_tx_ring(adapter, tx_ring);
1938 vfree(tx_ring->buffer_info);
1939 tx_ring->buffer_info = NULL;
1941 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1944 tx_ring->desc = NULL;
1948 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1949 * @adapter: board private structure
1951 * Free all transmit software resources
1954 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1958 for (i = 0; i < adapter->num_tx_queues; i++)
1959 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1962 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1963 struct e1000_buffer *buffer_info)
1965 if (buffer_info->dma) {
1966 if (buffer_info->mapped_as_page)
1967 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1968 buffer_info->length, DMA_TO_DEVICE);
1970 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1971 buffer_info->length,
1973 buffer_info->dma = 0;
1975 if (buffer_info->skb) {
1976 dev_kfree_skb_any(buffer_info->skb);
1977 buffer_info->skb = NULL;
1979 buffer_info->time_stamp = 0;
1980 /* buffer_info must be completely set up in the transmit path */
1984 * e1000_clean_tx_ring - Free Tx Buffers
1985 * @adapter: board private structure
1986 * @tx_ring: ring to be cleaned
1989 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1990 struct e1000_tx_ring *tx_ring)
1992 struct e1000_hw *hw = &adapter->hw;
1993 struct e1000_buffer *buffer_info;
1997 /* Free all the Tx ring sk_buffs */
1999 for (i = 0; i < tx_ring->count; i++) {
2000 buffer_info = &tx_ring->buffer_info[i];
2001 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2004 size = sizeof(struct e1000_buffer) * tx_ring->count;
2005 memset(tx_ring->buffer_info, 0, size);
2007 /* Zero out the descriptor ring */
2009 memset(tx_ring->desc, 0, tx_ring->size);
2011 tx_ring->next_to_use = 0;
2012 tx_ring->next_to_clean = 0;
2013 tx_ring->last_tx_tso = 0;
2015 writel(0, hw->hw_addr + tx_ring->tdh);
2016 writel(0, hw->hw_addr + tx_ring->tdt);
2020 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2021 * @adapter: board private structure
2024 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2028 for (i = 0; i < adapter->num_tx_queues; i++)
2029 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2033 * e1000_free_rx_resources - Free Rx Resources
2034 * @adapter: board private structure
2035 * @rx_ring: ring to clean the resources from
2037 * Free all receive software resources
2040 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2041 struct e1000_rx_ring *rx_ring)
2043 struct pci_dev *pdev = adapter->pdev;
2045 e1000_clean_rx_ring(adapter, rx_ring);
2047 vfree(rx_ring->buffer_info);
2048 rx_ring->buffer_info = NULL;
2050 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2053 rx_ring->desc = NULL;
2057 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2058 * @adapter: board private structure
2060 * Free all receive software resources
2063 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2067 for (i = 0; i < adapter->num_rx_queues; i++)
2068 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2072 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2073 * @adapter: board private structure
2074 * @rx_ring: ring to free buffers from
2077 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2078 struct e1000_rx_ring *rx_ring)
2080 struct e1000_hw *hw = &adapter->hw;
2081 struct e1000_buffer *buffer_info;
2082 struct pci_dev *pdev = adapter->pdev;
2086 /* Free all the Rx ring sk_buffs */
2087 for (i = 0; i < rx_ring->count; i++) {
2088 buffer_info = &rx_ring->buffer_info[i];
2089 if (buffer_info->dma &&
2090 adapter->clean_rx == e1000_clean_rx_irq) {
2091 dma_unmap_single(&pdev->dev, buffer_info->dma,
2092 buffer_info->length,
2094 } else if (buffer_info->dma &&
2095 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2096 dma_unmap_page(&pdev->dev, buffer_info->dma,
2097 buffer_info->length,
2101 buffer_info->dma = 0;
2102 if (buffer_info->page) {
2103 put_page(buffer_info->page);
2104 buffer_info->page = NULL;
2106 if (buffer_info->skb) {
2107 dev_kfree_skb(buffer_info->skb);
2108 buffer_info->skb = NULL;
2112 /* there also may be some cached data from a chained receive */
2113 if (rx_ring->rx_skb_top) {
2114 dev_kfree_skb(rx_ring->rx_skb_top);
2115 rx_ring->rx_skb_top = NULL;
2118 size = sizeof(struct e1000_buffer) * rx_ring->count;
2119 memset(rx_ring->buffer_info, 0, size);
2121 /* Zero out the descriptor ring */
2122 memset(rx_ring->desc, 0, rx_ring->size);
2124 rx_ring->next_to_clean = 0;
2125 rx_ring->next_to_use = 0;
2127 writel(0, hw->hw_addr + rx_ring->rdh);
2128 writel(0, hw->hw_addr + rx_ring->rdt);
2132 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2133 * @adapter: board private structure
2136 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2140 for (i = 0; i < adapter->num_rx_queues; i++)
2141 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2144 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2145 * and memory write and invalidate disabled for certain operations
2147 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2149 struct e1000_hw *hw = &adapter->hw;
2150 struct net_device *netdev = adapter->netdev;
2153 e1000_pci_clear_mwi(hw);
2156 rctl |= E1000_RCTL_RST;
2158 E1000_WRITE_FLUSH();
2161 if (netif_running(netdev))
2162 e1000_clean_all_rx_rings(adapter);
2165 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2167 struct e1000_hw *hw = &adapter->hw;
2168 struct net_device *netdev = adapter->netdev;
2172 rctl &= ~E1000_RCTL_RST;
2174 E1000_WRITE_FLUSH();
2177 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2178 e1000_pci_set_mwi(hw);
2180 if (netif_running(netdev)) {
2181 /* No need to loop, because 82542 supports only 1 queue */
2182 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2183 e1000_configure_rx(adapter);
2184 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2189 * e1000_set_mac - Change the Ethernet Address of the NIC
2190 * @netdev: network interface device structure
2191 * @p: pointer to an address structure
2193 * Returns 0 on success, negative on failure
2196 static int e1000_set_mac(struct net_device *netdev, void *p)
2198 struct e1000_adapter *adapter = netdev_priv(netdev);
2199 struct e1000_hw *hw = &adapter->hw;
2200 struct sockaddr *addr = p;
2202 if (!is_valid_ether_addr(addr->sa_data))
2203 return -EADDRNOTAVAIL;
2205 /* 82542 2.0 needs to be in reset to write receive address registers */
2207 if (hw->mac_type == e1000_82542_rev2_0)
2208 e1000_enter_82542_rst(adapter);
2210 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2211 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2213 e1000_rar_set(hw, hw->mac_addr, 0);
2215 if (hw->mac_type == e1000_82542_rev2_0)
2216 e1000_leave_82542_rst(adapter);
2222 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2223 * @netdev: network interface device structure
2225 * The set_rx_mode entry point is called whenever the unicast or multicast
2226 * address lists or the network interface flags are updated. This routine is
2227 * responsible for configuring the hardware for proper unicast, multicast,
2228 * promiscuous mode, and all-multi behavior.
2231 static void e1000_set_rx_mode(struct net_device *netdev)
2233 struct e1000_adapter *adapter = netdev_priv(netdev);
2234 struct e1000_hw *hw = &adapter->hw;
2235 struct netdev_hw_addr *ha;
2236 bool use_uc = false;
2239 int i, rar_entries = E1000_RAR_ENTRIES;
2240 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2241 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2244 e_err(probe, "memory allocation failed\n");
2248 /* Check for Promiscuous and All Multicast modes */
2252 if (netdev->flags & IFF_PROMISC) {
2253 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2254 rctl &= ~E1000_RCTL_VFE;
2256 if (netdev->flags & IFF_ALLMULTI)
2257 rctl |= E1000_RCTL_MPE;
2259 rctl &= ~E1000_RCTL_MPE;
2260 /* Enable VLAN filter if there is a VLAN */
2261 if (e1000_vlan_used(adapter))
2262 rctl |= E1000_RCTL_VFE;
2265 if (netdev_uc_count(netdev) > rar_entries - 1) {
2266 rctl |= E1000_RCTL_UPE;
2267 } else if (!(netdev->flags & IFF_PROMISC)) {
2268 rctl &= ~E1000_RCTL_UPE;
2274 /* 82542 2.0 needs to be in reset to write receive address registers */
2276 if (hw->mac_type == e1000_82542_rev2_0)
2277 e1000_enter_82542_rst(adapter);
2279 /* load the first 14 addresses into the exact filters 1-14. Unicast
2280 * addresses take precedence to avoid disabling unicast filtering
2283 * RAR 0 is used for the station MAC address
2284 * if there are not 14 addresses, go ahead and clear the filters
2288 netdev_for_each_uc_addr(ha, netdev) {
2289 if (i == rar_entries)
2291 e1000_rar_set(hw, ha->addr, i++);
2294 netdev_for_each_mc_addr(ha, netdev) {
2295 if (i == rar_entries) {
2296 /* load any remaining addresses into the hash table */
2297 u32 hash_reg, hash_bit, mta;
2298 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2299 hash_reg = (hash_value >> 5) & 0x7F;
2300 hash_bit = hash_value & 0x1F;
2301 mta = (1 << hash_bit);
2302 mcarray[hash_reg] |= mta;
2304 e1000_rar_set(hw, ha->addr, i++);
2308 for (; i < rar_entries; i++) {
2309 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2310 E1000_WRITE_FLUSH();
2311 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2312 E1000_WRITE_FLUSH();
2315 /* write the hash table completely, write from bottom to avoid
2316 * both stupid write combining chipsets, and flushing each write */
2317 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2319 * If we are on an 82544 has an errata where writing odd
2320 * offsets overwrites the previous even offset, but writing
2321 * backwards over the range solves the issue by always
2322 * writing the odd offset first
2324 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2326 E1000_WRITE_FLUSH();
2328 if (hw->mac_type == e1000_82542_rev2_0)
2329 e1000_leave_82542_rst(adapter);
2334 /* Need to wait a few seconds after link up to get diagnostic information from
2337 static void e1000_update_phy_info(unsigned long data)
2339 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2340 schedule_work(&adapter->phy_info_task);
2343 static void e1000_update_phy_info_task(struct work_struct *work)
2345 struct e1000_adapter *adapter = container_of(work,
2346 struct e1000_adapter,
2348 struct e1000_hw *hw = &adapter->hw;
2351 e1000_phy_get_info(hw, &adapter->phy_info);
2356 * e1000_82547_tx_fifo_stall - Timer Call-back
2357 * @data: pointer to adapter cast into an unsigned long
2359 static void e1000_82547_tx_fifo_stall(unsigned long data)
2361 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2362 schedule_work(&adapter->fifo_stall_task);
2366 * e1000_82547_tx_fifo_stall_task - task to complete work
2367 * @work: work struct contained inside adapter struct
2369 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2371 struct e1000_adapter *adapter = container_of(work,
2372 struct e1000_adapter,
2374 struct e1000_hw *hw = &adapter->hw;
2375 struct net_device *netdev = adapter->netdev;
2379 if (atomic_read(&adapter->tx_fifo_stall)) {
2380 if ((er32(TDT) == er32(TDH)) &&
2381 (er32(TDFT) == er32(TDFH)) &&
2382 (er32(TDFTS) == er32(TDFHS))) {
2384 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2385 ew32(TDFT, adapter->tx_head_addr);
2386 ew32(TDFH, adapter->tx_head_addr);
2387 ew32(TDFTS, adapter->tx_head_addr);
2388 ew32(TDFHS, adapter->tx_head_addr);
2390 E1000_WRITE_FLUSH();
2392 adapter->tx_fifo_head = 0;
2393 atomic_set(&adapter->tx_fifo_stall, 0);
2394 netif_wake_queue(netdev);
2395 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2396 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2402 bool e1000_has_link(struct e1000_adapter *adapter)
2404 struct e1000_hw *hw = &adapter->hw;
2405 bool link_active = false;
2407 /* get_link_status is set on LSC (link status) interrupt or rx
2408 * sequence error interrupt (except on intel ce4100).
2409 * get_link_status will stay false until the
2410 * e1000_check_for_link establishes link for copper adapters
2413 switch (hw->media_type) {
2414 case e1000_media_type_copper:
2415 if (hw->mac_type == e1000_ce4100)
2416 hw->get_link_status = 1;
2417 if (hw->get_link_status) {
2418 e1000_check_for_link(hw);
2419 link_active = !hw->get_link_status;
2424 case e1000_media_type_fiber:
2425 e1000_check_for_link(hw);
2426 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2428 case e1000_media_type_internal_serdes:
2429 e1000_check_for_link(hw);
2430 link_active = hw->serdes_has_link;
2440 * e1000_watchdog - Timer Call-back
2441 * @data: pointer to adapter cast into an unsigned long
2443 static void e1000_watchdog(unsigned long data)
2445 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
2446 struct e1000_hw *hw = &adapter->hw;
2447 struct net_device *netdev = adapter->netdev;
2448 struct e1000_tx_ring *txdr = adapter->tx_ring;
2451 link = e1000_has_link(adapter);
2452 if ((netif_carrier_ok(netdev)) && link)
2456 if (!netif_carrier_ok(netdev)) {
2459 /* update snapshot of PHY registers on LSC */
2460 e1000_get_speed_and_duplex(hw,
2461 &adapter->link_speed,
2462 &adapter->link_duplex);
2465 pr_info("%s NIC Link is Up %d Mbps %s, "
2466 "Flow Control: %s\n",
2468 adapter->link_speed,
2469 adapter->link_duplex == FULL_DUPLEX ?
2470 "Full Duplex" : "Half Duplex",
2471 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2472 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2473 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2474 E1000_CTRL_TFCE) ? "TX" : "None")));
2476 /* adjust timeout factor according to speed/duplex */
2477 adapter->tx_timeout_factor = 1;
2478 switch (adapter->link_speed) {
2481 adapter->tx_timeout_factor = 16;
2485 /* maybe add some timeout factor ? */
2489 /* enable transmits in the hardware */
2491 tctl |= E1000_TCTL_EN;
2494 netif_carrier_on(netdev);
2495 if (!test_bit(__E1000_DOWN, &adapter->flags))
2496 mod_timer(&adapter->phy_info_timer,
2497 round_jiffies(jiffies + 2 * HZ));
2498 adapter->smartspeed = 0;
2501 if (netif_carrier_ok(netdev)) {
2502 adapter->link_speed = 0;
2503 adapter->link_duplex = 0;
2504 pr_info("%s NIC Link is Down\n",
2506 netif_carrier_off(netdev);
2508 if (!test_bit(__E1000_DOWN, &adapter->flags))
2509 mod_timer(&adapter->phy_info_timer,
2510 round_jiffies(jiffies + 2 * HZ));
2513 e1000_smartspeed(adapter);
2517 e1000_update_stats(adapter);
2519 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2520 adapter->tpt_old = adapter->stats.tpt;
2521 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2522 adapter->colc_old = adapter->stats.colc;
2524 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2525 adapter->gorcl_old = adapter->stats.gorcl;
2526 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2527 adapter->gotcl_old = adapter->stats.gotcl;
2529 e1000_update_adaptive(hw);
2531 if (!netif_carrier_ok(netdev)) {
2532 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2533 /* We've lost link, so the controller stops DMA,
2534 * but we've got queued Tx work that's never going
2535 * to get done, so reset controller to flush Tx.
2536 * (Do the reset outside of interrupt context). */
2537 adapter->tx_timeout_count++;
2538 schedule_work(&adapter->reset_task);
2539 /* return immediately since reset is imminent */
2544 /* Simple mode for Interrupt Throttle Rate (ITR) */
2545 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2547 * Symmetric Tx/Rx gets a reduced ITR=2000;
2548 * Total asymmetrical Tx or Rx gets ITR=8000;
2549 * everyone else is between 2000-8000.
2551 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2552 u32 dif = (adapter->gotcl > adapter->gorcl ?
2553 adapter->gotcl - adapter->gorcl :
2554 adapter->gorcl - adapter->gotcl) / 10000;
2555 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2557 ew32(ITR, 1000000000 / (itr * 256));
2560 /* Cause software interrupt to ensure rx ring is cleaned */
2561 ew32(ICS, E1000_ICS_RXDMT0);
2563 /* Force detection of hung controller every watchdog period */
2564 adapter->detect_tx_hung = true;
2566 /* Reset the timer */
2567 if (!test_bit(__E1000_DOWN, &adapter->flags))
2568 mod_timer(&adapter->watchdog_timer,
2569 round_jiffies(jiffies + 2 * HZ));
2572 enum latency_range {
2576 latency_invalid = 255
2580 * e1000_update_itr - update the dynamic ITR value based on statistics
2581 * @adapter: pointer to adapter
2582 * @itr_setting: current adapter->itr
2583 * @packets: the number of packets during this measurement interval
2584 * @bytes: the number of bytes during this measurement interval
2586 * Stores a new ITR value based on packets and byte
2587 * counts during the last interrupt. The advantage of per interrupt
2588 * computation is faster updates and more accurate ITR for the current
2589 * traffic pattern. Constants in this function were computed
2590 * based on theoretical maximum wire speed and thresholds were set based
2591 * on testing data as well as attempting to minimize response time
2592 * while increasing bulk throughput.
2593 * this functionality is controlled by the InterruptThrottleRate module
2594 * parameter (see e1000_param.c)
2596 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2597 u16 itr_setting, int packets, int bytes)
2599 unsigned int retval = itr_setting;
2600 struct e1000_hw *hw = &adapter->hw;
2602 if (unlikely(hw->mac_type < e1000_82540))
2603 goto update_itr_done;
2606 goto update_itr_done;
2608 switch (itr_setting) {
2609 case lowest_latency:
2610 /* jumbo frames get bulk treatment*/
2611 if (bytes/packets > 8000)
2612 retval = bulk_latency;
2613 else if ((packets < 5) && (bytes > 512))
2614 retval = low_latency;
2616 case low_latency: /* 50 usec aka 20000 ints/s */
2617 if (bytes > 10000) {
2618 /* jumbo frames need bulk latency setting */
2619 if (bytes/packets > 8000)
2620 retval = bulk_latency;
2621 else if ((packets < 10) || ((bytes/packets) > 1200))
2622 retval = bulk_latency;
2623 else if ((packets > 35))
2624 retval = lowest_latency;
2625 } else if (bytes/packets > 2000)
2626 retval = bulk_latency;
2627 else if (packets <= 2 && bytes < 512)
2628 retval = lowest_latency;
2630 case bulk_latency: /* 250 usec aka 4000 ints/s */
2631 if (bytes > 25000) {
2633 retval = low_latency;
2634 } else if (bytes < 6000) {
2635 retval = low_latency;
2644 static void e1000_set_itr(struct e1000_adapter *adapter)
2646 struct e1000_hw *hw = &adapter->hw;
2648 u32 new_itr = adapter->itr;
2650 if (unlikely(hw->mac_type < e1000_82540))
2653 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2654 if (unlikely(adapter->link_speed != SPEED_1000)) {
2660 adapter->tx_itr = e1000_update_itr(adapter,
2662 adapter->total_tx_packets,
2663 adapter->total_tx_bytes);
2664 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2665 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2666 adapter->tx_itr = low_latency;
2668 adapter->rx_itr = e1000_update_itr(adapter,
2670 adapter->total_rx_packets,
2671 adapter->total_rx_bytes);
2672 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2673 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2674 adapter->rx_itr = low_latency;
2676 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2678 switch (current_itr) {
2679 /* counts and packets in update_itr are dependent on these numbers */
2680 case lowest_latency:
2684 new_itr = 20000; /* aka hwitr = ~200 */
2694 if (new_itr != adapter->itr) {
2695 /* this attempts to bias the interrupt rate towards Bulk
2696 * by adding intermediate steps when interrupt rate is
2698 new_itr = new_itr > adapter->itr ?
2699 min(adapter->itr + (new_itr >> 2), new_itr) :
2701 adapter->itr = new_itr;
2702 ew32(ITR, 1000000000 / (new_itr * 256));
2706 #define E1000_TX_FLAGS_CSUM 0x00000001
2707 #define E1000_TX_FLAGS_VLAN 0x00000002
2708 #define E1000_TX_FLAGS_TSO 0x00000004
2709 #define E1000_TX_FLAGS_IPV4 0x00000008
2710 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2711 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2713 static int e1000_tso(struct e1000_adapter *adapter,
2714 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2716 struct e1000_context_desc *context_desc;
2717 struct e1000_buffer *buffer_info;
2720 u16 ipcse = 0, tucse, mss;
2721 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2724 if (skb_is_gso(skb)) {
2725 if (skb_header_cloned(skb)) {
2726 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2731 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2732 mss = skb_shinfo(skb)->gso_size;
2733 if (skb->protocol == htons(ETH_P_IP)) {
2734 struct iphdr *iph = ip_hdr(skb);
2737 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2741 cmd_length = E1000_TXD_CMD_IP;
2742 ipcse = skb_transport_offset(skb) - 1;
2743 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2744 ipv6_hdr(skb)->payload_len = 0;
2745 tcp_hdr(skb)->check =
2746 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2747 &ipv6_hdr(skb)->daddr,
2751 ipcss = skb_network_offset(skb);
2752 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2753 tucss = skb_transport_offset(skb);
2754 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2757 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2758 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2760 i = tx_ring->next_to_use;
2761 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2762 buffer_info = &tx_ring->buffer_info[i];
2764 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2765 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2766 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2767 context_desc->upper_setup.tcp_fields.tucss = tucss;
2768 context_desc->upper_setup.tcp_fields.tucso = tucso;
2769 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2770 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2771 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2772 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2774 buffer_info->time_stamp = jiffies;
2775 buffer_info->next_to_watch = i;
2777 if (++i == tx_ring->count) i = 0;
2778 tx_ring->next_to_use = i;
2785 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2786 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2788 struct e1000_context_desc *context_desc;
2789 struct e1000_buffer *buffer_info;
2792 u32 cmd_len = E1000_TXD_CMD_DEXT;
2794 if (skb->ip_summed != CHECKSUM_PARTIAL)
2797 switch (skb->protocol) {
2798 case cpu_to_be16(ETH_P_IP):
2799 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2800 cmd_len |= E1000_TXD_CMD_TCP;
2802 case cpu_to_be16(ETH_P_IPV6):
2803 /* XXX not handling all IPV6 headers */
2804 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2805 cmd_len |= E1000_TXD_CMD_TCP;
2808 if (unlikely(net_ratelimit()))
2809 e_warn(drv, "checksum_partial proto=%x!\n",
2814 css = skb_checksum_start_offset(skb);
2816 i = tx_ring->next_to_use;
2817 buffer_info = &tx_ring->buffer_info[i];
2818 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2820 context_desc->lower_setup.ip_config = 0;
2821 context_desc->upper_setup.tcp_fields.tucss = css;
2822 context_desc->upper_setup.tcp_fields.tucso =
2823 css + skb->csum_offset;
2824 context_desc->upper_setup.tcp_fields.tucse = 0;
2825 context_desc->tcp_seg_setup.data = 0;
2826 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2828 buffer_info->time_stamp = jiffies;
2829 buffer_info->next_to_watch = i;
2831 if (unlikely(++i == tx_ring->count)) i = 0;
2832 tx_ring->next_to_use = i;
2837 #define E1000_MAX_TXD_PWR 12
2838 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2840 static int e1000_tx_map(struct e1000_adapter *adapter,
2841 struct e1000_tx_ring *tx_ring,
2842 struct sk_buff *skb, unsigned int first,
2843 unsigned int max_per_txd, unsigned int nr_frags,
2846 struct e1000_hw *hw = &adapter->hw;
2847 struct pci_dev *pdev = adapter->pdev;
2848 struct e1000_buffer *buffer_info;
2849 unsigned int len = skb_headlen(skb);
2850 unsigned int offset = 0, size, count = 0, i;
2853 i = tx_ring->next_to_use;
2856 buffer_info = &tx_ring->buffer_info[i];
2857 size = min(len, max_per_txd);
2858 /* Workaround for Controller erratum --
2859 * descriptor for non-tso packet in a linear SKB that follows a
2860 * tso gets written back prematurely before the data is fully
2861 * DMA'd to the controller */
2862 if (!skb->data_len && tx_ring->last_tx_tso &&
2864 tx_ring->last_tx_tso = 0;
2868 /* Workaround for premature desc write-backs
2869 * in TSO mode. Append 4-byte sentinel desc */
2870 if (unlikely(mss && !nr_frags && size == len && size > 8))
2872 /* work-around for errata 10 and it applies
2873 * to all controllers in PCI-X mode
2874 * The fix is to make sure that the first descriptor of a
2875 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2877 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2878 (size > 2015) && count == 0))
2881 /* Workaround for potential 82544 hang in PCI-X. Avoid
2882 * terminating buffers within evenly-aligned dwords. */
2883 if (unlikely(adapter->pcix_82544 &&
2884 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2888 buffer_info->length = size;
2889 /* set time_stamp *before* dma to help avoid a possible race */
2890 buffer_info->time_stamp = jiffies;
2891 buffer_info->mapped_as_page = false;
2892 buffer_info->dma = dma_map_single(&pdev->dev,
2894 size, DMA_TO_DEVICE);
2895 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2897 buffer_info->next_to_watch = i;
2904 if (unlikely(i == tx_ring->count))
2909 for (f = 0; f < nr_frags; f++) {
2910 struct skb_frag_struct *frag;
2912 frag = &skb_shinfo(skb)->frags[f];
2914 offset = frag->page_offset;
2918 if (unlikely(i == tx_ring->count))
2921 buffer_info = &tx_ring->buffer_info[i];
2922 size = min(len, max_per_txd);
2923 /* Workaround for premature desc write-backs
2924 * in TSO mode. Append 4-byte sentinel desc */
2925 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2927 /* Workaround for potential 82544 hang in PCI-X.
2928 * Avoid terminating buffers within evenly-aligned
2930 if (unlikely(adapter->pcix_82544 &&
2931 !((unsigned long)(page_to_phys(frag->page) + offset
2936 buffer_info->length = size;
2937 buffer_info->time_stamp = jiffies;
2938 buffer_info->mapped_as_page = true;
2939 buffer_info->dma = dma_map_page(&pdev->dev, frag->page,
2942 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2944 buffer_info->next_to_watch = i;
2952 tx_ring->buffer_info[i].skb = skb;
2953 tx_ring->buffer_info[first].next_to_watch = i;
2958 dev_err(&pdev->dev, "TX DMA map failed\n");
2959 buffer_info->dma = 0;
2965 i += tx_ring->count;
2967 buffer_info = &tx_ring->buffer_info[i];
2968 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2974 static void e1000_tx_queue(struct e1000_adapter *adapter,
2975 struct e1000_tx_ring *tx_ring, int tx_flags,
2978 struct e1000_hw *hw = &adapter->hw;
2979 struct e1000_tx_desc *tx_desc = NULL;
2980 struct e1000_buffer *buffer_info;
2981 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2984 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2985 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2987 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2989 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2990 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2993 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2994 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2995 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2998 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2999 txd_lower |= E1000_TXD_CMD_VLE;
3000 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3003 i = tx_ring->next_to_use;
3006 buffer_info = &tx_ring->buffer_info[i];
3007 tx_desc = E1000_TX_DESC(*tx_ring, i);
3008 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3009 tx_desc->lower.data =
3010 cpu_to_le32(txd_lower | buffer_info->length);
3011 tx_desc->upper.data = cpu_to_le32(txd_upper);
3012 if (unlikely(++i == tx_ring->count)) i = 0;
3015 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3017 /* Force memory writes to complete before letting h/w
3018 * know there are new descriptors to fetch. (Only
3019 * applicable for weak-ordered memory model archs,
3020 * such as IA-64). */
3023 tx_ring->next_to_use = i;
3024 writel(i, hw->hw_addr + tx_ring->tdt);
3025 /* we need this if more than one processor can write to our tail
3026 * at a time, it syncronizes IO on IA64/Altix systems */
3031 * 82547 workaround to avoid controller hang in half-duplex environment.
3032 * The workaround is to avoid queuing a large packet that would span
3033 * the internal Tx FIFO ring boundary by notifying the stack to resend
3034 * the packet at a later time. This gives the Tx FIFO an opportunity to
3035 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3036 * to the beginning of the Tx FIFO.
3039 #define E1000_FIFO_HDR 0x10
3040 #define E1000_82547_PAD_LEN 0x3E0
3042 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3043 struct sk_buff *skb)
3045 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3046 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3048 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3050 if (adapter->link_duplex != HALF_DUPLEX)
3051 goto no_fifo_stall_required;
3053 if (atomic_read(&adapter->tx_fifo_stall))
3056 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3057 atomic_set(&adapter->tx_fifo_stall, 1);
3061 no_fifo_stall_required:
3062 adapter->tx_fifo_head += skb_fifo_len;
3063 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3064 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3068 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3070 struct e1000_adapter *adapter = netdev_priv(netdev);
3071 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3073 netif_stop_queue(netdev);
3074 /* Herbert's original patch had:
3075 * smp_mb__after_netif_stop_queue();
3076 * but since that doesn't exist yet, just open code it. */
3079 /* We need to check again in a case another CPU has just
3080 * made room available. */
3081 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3085 netif_start_queue(netdev);
3086 ++adapter->restart_queue;
3090 static int e1000_maybe_stop_tx(struct net_device *netdev,
3091 struct e1000_tx_ring *tx_ring, int size)
3093 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3095 return __e1000_maybe_stop_tx(netdev, size);
3098 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3099 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3100 struct net_device *netdev)
3102 struct e1000_adapter *adapter = netdev_priv(netdev);
3103 struct e1000_hw *hw = &adapter->hw;
3104 struct e1000_tx_ring *tx_ring;
3105 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3106 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3107 unsigned int tx_flags = 0;
3108 unsigned int len = skb_headlen(skb);
3109 unsigned int nr_frags;
3115 /* This goes back to the question of how to logically map a tx queue
3116 * to a flow. Right now, performance is impacted slightly negatively
3117 * if using multiple tx queues. If the stack breaks away from a
3118 * single qdisc implementation, we can look at this again. */
3119 tx_ring = adapter->tx_ring;
3121 if (unlikely(skb->len <= 0)) {
3122 dev_kfree_skb_any(skb);
3123 return NETDEV_TX_OK;
3126 mss = skb_shinfo(skb)->gso_size;
3127 /* The controller does a simple calculation to
3128 * make sure there is enough room in the FIFO before
3129 * initiating the DMA for each buffer. The calc is:
3130 * 4 = ceil(buffer len/mss). To make sure we don't
3131 * overrun the FIFO, adjust the max buffer len if mss
3135 max_per_txd = min(mss << 2, max_per_txd);
3136 max_txd_pwr = fls(max_per_txd) - 1;
3138 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3139 if (skb->data_len && hdr_len == len) {
3140 switch (hw->mac_type) {
3141 unsigned int pull_size;
3143 /* Make sure we have room to chop off 4 bytes,
3144 * and that the end alignment will work out to
3145 * this hardware's requirements
3146 * NOTE: this is a TSO only workaround
3147 * if end byte alignment not correct move us
3148 * into the next dword */
3149 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3152 pull_size = min((unsigned int)4, skb->data_len);
3153 if (!__pskb_pull_tail(skb, pull_size)) {
3154 e_err(drv, "__pskb_pull_tail "
3156 dev_kfree_skb_any(skb);
3157 return NETDEV_TX_OK;
3159 len = skb_headlen(skb);
3168 /* reserve a descriptor for the offload context */
3169 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3173 /* Controller Erratum workaround */
3174 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3177 count += TXD_USE_COUNT(len, max_txd_pwr);
3179 if (adapter->pcix_82544)
3182 /* work-around for errata 10 and it applies to all controllers
3183 * in PCI-X mode, so add one more descriptor to the count
3185 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3189 nr_frags = skb_shinfo(skb)->nr_frags;
3190 for (f = 0; f < nr_frags; f++)
3191 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3193 if (adapter->pcix_82544)
3196 /* need: count + 2 desc gap to keep tail from touching
3197 * head, otherwise try next time */
3198 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3199 return NETDEV_TX_BUSY;
3201 if (unlikely(hw->mac_type == e1000_82547)) {
3202 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
3203 netif_stop_queue(netdev);
3204 if (!test_bit(__E1000_DOWN, &adapter->flags))
3205 mod_timer(&adapter->tx_fifo_stall_timer,
3207 return NETDEV_TX_BUSY;
3211 if (vlan_tx_tag_present(skb)) {
3212 tx_flags |= E1000_TX_FLAGS_VLAN;
3213 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3216 first = tx_ring->next_to_use;
3218 tso = e1000_tso(adapter, tx_ring, skb);
3220 dev_kfree_skb_any(skb);
3221 return NETDEV_TX_OK;
3225 if (likely(hw->mac_type != e1000_82544))
3226 tx_ring->last_tx_tso = 1;
3227 tx_flags |= E1000_TX_FLAGS_TSO;
3228 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3229 tx_flags |= E1000_TX_FLAGS_CSUM;
3231 if (likely(skb->protocol == htons(ETH_P_IP)))
3232 tx_flags |= E1000_TX_FLAGS_IPV4;
3234 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3238 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3239 /* Make sure there is space in the ring for the next send. */
3240 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3243 dev_kfree_skb_any(skb);
3244 tx_ring->buffer_info[first].time_stamp = 0;
3245 tx_ring->next_to_use = first;
3248 return NETDEV_TX_OK;
3252 * e1000_tx_timeout - Respond to a Tx Hang
3253 * @netdev: network interface device structure
3256 static void e1000_tx_timeout(struct net_device *netdev)
3258 struct e1000_adapter *adapter = netdev_priv(netdev);
3260 /* Do the reset outside of interrupt context */
3261 adapter->tx_timeout_count++;
3262 schedule_work(&adapter->reset_task);
3265 static void e1000_reset_task(struct work_struct *work)
3267 struct e1000_adapter *adapter =
3268 container_of(work, struct e1000_adapter, reset_task);
3270 e1000_reinit_safe(adapter);
3274 * e1000_get_stats - Get System Network Statistics
3275 * @netdev: network interface device structure
3277 * Returns the address of the device statistics structure.
3278 * The statistics are actually updated from the timer callback.
3281 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3283 /* only return the current stats */
3284 return &netdev->stats;
3288 * e1000_change_mtu - Change the Maximum Transfer Unit
3289 * @netdev: network interface device structure
3290 * @new_mtu: new value for maximum frame size
3292 * Returns 0 on success, negative on failure
3295 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3297 struct e1000_adapter *adapter = netdev_priv(netdev);
3298 struct e1000_hw *hw = &adapter->hw;
3299 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3301 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3302 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3303 e_err(probe, "Invalid MTU setting\n");
3307 /* Adapter-specific max frame size limits. */
3308 switch (hw->mac_type) {
3309 case e1000_undefined ... e1000_82542_rev2_1:
3310 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3311 e_err(probe, "Jumbo Frames not supported.\n");
3316 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3320 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3322 /* e1000_down has a dependency on max_frame_size */
3323 hw->max_frame_size = max_frame;
3324 if (netif_running(netdev))
3325 e1000_down(adapter);
3327 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3328 * means we reserve 2 more, this pushes us to allocate from the next
3330 * i.e. RXBUFFER_2048 --> size-4096 slab
3331 * however with the new *_jumbo_rx* routines, jumbo receives will use
3332 * fragmented skbs */
3334 if (max_frame <= E1000_RXBUFFER_2048)
3335 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3337 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3338 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3339 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3340 adapter->rx_buffer_len = PAGE_SIZE;
3343 /* adjust allocation if LPE protects us, and we aren't using SBP */
3344 if (!hw->tbi_compatibility_on &&
3345 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3346 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3347 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3349 pr_info("%s changing MTU from %d to %d\n",
3350 netdev->name, netdev->mtu, new_mtu);
3351 netdev->mtu = new_mtu;
3353 if (netif_running(netdev))
3356 e1000_reset(adapter);
3358 clear_bit(__E1000_RESETTING, &adapter->flags);
3364 * e1000_update_stats - Update the board statistics counters
3365 * @adapter: board private structure
3368 void e1000_update_stats(struct e1000_adapter *adapter)
3370 struct net_device *netdev = adapter->netdev;
3371 struct e1000_hw *hw = &adapter->hw;
3372 struct pci_dev *pdev = adapter->pdev;
3373 unsigned long flags;
3376 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3379 * Prevent stats update while adapter is being reset, or if the pci
3380 * connection is down.
3382 if (adapter->link_speed == 0)
3384 if (pci_channel_offline(pdev))
3387 spin_lock_irqsave(&adapter->stats_lock, flags);
3389 /* these counters are modified from e1000_tbi_adjust_stats,
3390 * called from the interrupt context, so they must only
3391 * be written while holding adapter->stats_lock
3394 adapter->stats.crcerrs += er32(CRCERRS);
3395 adapter->stats.gprc += er32(GPRC);
3396 adapter->stats.gorcl += er32(GORCL);
3397 adapter->stats.gorch += er32(GORCH);
3398 adapter->stats.bprc += er32(BPRC);
3399 adapter->stats.mprc += er32(MPRC);
3400 adapter->stats.roc += er32(ROC);
3402 adapter->stats.prc64 += er32(PRC64);
3403 adapter->stats.prc127 += er32(PRC127);
3404 adapter->stats.prc255 += er32(PRC255);
3405 adapter->stats.prc511 += er32(PRC511);
3406 adapter->stats.prc1023 += er32(PRC1023);
3407 adapter->stats.prc1522 += er32(PRC1522);
3409 adapter->stats.symerrs += er32(SYMERRS);
3410 adapter->stats.mpc += er32(MPC);
3411 adapter->stats.scc += er32(SCC);
3412 adapter->stats.ecol += er32(ECOL);
3413 adapter->stats.mcc += er32(MCC);
3414 adapter->stats.latecol += er32(LATECOL);
3415 adapter->stats.dc += er32(DC);
3416 adapter->stats.sec += er32(SEC);
3417 adapter->stats.rlec += er32(RLEC);
3418 adapter->stats.xonrxc += er32(XONRXC);
3419 adapter->stats.xontxc += er32(XONTXC);
3420 adapter->stats.xoffrxc += er32(XOFFRXC);
3421 adapter->stats.xofftxc += er32(XOFFTXC);
3422 adapter->stats.fcruc += er32(FCRUC);
3423 adapter->stats.gptc += er32(GPTC);
3424 adapter->stats.gotcl += er32(GOTCL);
3425 adapter->stats.gotch += er32(GOTCH);
3426 adapter->stats.rnbc += er32(RNBC);
3427 adapter->stats.ruc += er32(RUC);
3428 adapter->stats.rfc += er32(RFC);
3429 adapter->stats.rjc += er32(RJC);
3430 adapter->stats.torl += er32(TORL);
3431 adapter->stats.torh += er32(TORH);
3432 adapter->stats.totl += er32(TOTL);
3433 adapter->stats.toth += er32(TOTH);
3434 adapter->stats.tpr += er32(TPR);
3436 adapter->stats.ptc64 += er32(PTC64);
3437 adapter->stats.ptc127 += er32(PTC127);
3438 adapter->stats.ptc255 += er32(PTC255);
3439 adapter->stats.ptc511 += er32(PTC511);
3440 adapter->stats.ptc1023 += er32(PTC1023);
3441 adapter->stats.ptc1522 += er32(PTC1522);
3443 adapter->stats.mptc += er32(MPTC);
3444 adapter->stats.bptc += er32(BPTC);
3446 /* used for adaptive IFS */
3448 hw->tx_packet_delta = er32(TPT);
3449 adapter->stats.tpt += hw->tx_packet_delta;
3450 hw->collision_delta = er32(COLC);
3451 adapter->stats.colc += hw->collision_delta;
3453 if (hw->mac_type >= e1000_82543) {
3454 adapter->stats.algnerrc += er32(ALGNERRC);
3455 adapter->stats.rxerrc += er32(RXERRC);
3456 adapter->stats.tncrs += er32(TNCRS);
3457 adapter->stats.cexterr += er32(CEXTERR);
3458 adapter->stats.tsctc += er32(TSCTC);
3459 adapter->stats.tsctfc += er32(TSCTFC);
3462 /* Fill out the OS statistics structure */
3463 netdev->stats.multicast = adapter->stats.mprc;
3464 netdev->stats.collisions = adapter->stats.colc;
3468 /* RLEC on some newer hardware can be incorrect so build
3469 * our own version based on RUC and ROC */
3470 netdev->stats.rx_errors = adapter->stats.rxerrc +
3471 adapter->stats.crcerrs + adapter->stats.algnerrc +
3472 adapter->stats.ruc + adapter->stats.roc +
3473 adapter->stats.cexterr;
3474 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3475 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3476 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3477 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3478 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3481 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3482 netdev->stats.tx_errors = adapter->stats.txerrc;
3483 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3484 netdev->stats.tx_window_errors = adapter->stats.latecol;
3485 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3486 if (hw->bad_tx_carr_stats_fd &&
3487 adapter->link_duplex == FULL_DUPLEX) {
3488 netdev->stats.tx_carrier_errors = 0;
3489 adapter->stats.tncrs = 0;
3492 /* Tx Dropped needs to be maintained elsewhere */
3495 if (hw->media_type == e1000_media_type_copper) {
3496 if ((adapter->link_speed == SPEED_1000) &&
3497 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3498 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3499 adapter->phy_stats.idle_errors += phy_tmp;
3502 if ((hw->mac_type <= e1000_82546) &&
3503 (hw->phy_type == e1000_phy_m88) &&
3504 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3505 adapter->phy_stats.receive_errors += phy_tmp;
3508 /* Management Stats */
3509 if (hw->has_smbus) {
3510 adapter->stats.mgptc += er32(MGTPTC);
3511 adapter->stats.mgprc += er32(MGTPRC);
3512 adapter->stats.mgpdc += er32(MGTPDC);
3515 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3519 * e1000_intr - Interrupt Handler
3520 * @irq: interrupt number
3521 * @data: pointer to a network interface device structure
3524 static irqreturn_t e1000_intr(int irq, void *data)
3526 struct net_device *netdev = data;
3527 struct e1000_adapter *adapter = netdev_priv(netdev);
3528 struct e1000_hw *hw = &adapter->hw;
3529 u32 icr = er32(ICR);
3531 if (unlikely((!icr)))
3532 return IRQ_NONE; /* Not our interrupt */
3535 * we might have caused the interrupt, but the above
3536 * read cleared it, and just in case the driver is
3537 * down there is nothing to do so return handled
3539 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3542 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3543 hw->get_link_status = 1;
3544 /* guard against interrupt when we're going down */
3545 if (!test_bit(__E1000_DOWN, &adapter->flags))
3546 mod_timer(&adapter->watchdog_timer, jiffies + 1);
3549 /* disable interrupts, without the synchronize_irq bit */
3551 E1000_WRITE_FLUSH();
3553 if (likely(napi_schedule_prep(&adapter->napi))) {
3554 adapter->total_tx_bytes = 0;
3555 adapter->total_tx_packets = 0;
3556 adapter->total_rx_bytes = 0;
3557 adapter->total_rx_packets = 0;
3558 __napi_schedule(&adapter->napi);
3560 /* this really should not happen! if it does it is basically a
3561 * bug, but not a hard error, so enable ints and continue */
3562 if (!test_bit(__E1000_DOWN, &adapter->flags))
3563 e1000_irq_enable(adapter);
3570 * e1000_clean - NAPI Rx polling callback
3571 * @adapter: board private structure
3573 static int e1000_clean(struct napi_struct *napi, int budget)
3575 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3576 int tx_clean_complete = 0, work_done = 0;
3578 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3580 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3582 if (!tx_clean_complete)
3585 /* If budget not fully consumed, exit the polling mode */
3586 if (work_done < budget) {
3587 if (likely(adapter->itr_setting & 3))
3588 e1000_set_itr(adapter);
3589 napi_complete(napi);
3590 if (!test_bit(__E1000_DOWN, &adapter->flags))
3591 e1000_irq_enable(adapter);
3598 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3599 * @adapter: board private structure
3601 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3602 struct e1000_tx_ring *tx_ring)
3604 struct e1000_hw *hw = &adapter->hw;
3605 struct net_device *netdev = adapter->netdev;
3606 struct e1000_tx_desc *tx_desc, *eop_desc;
3607 struct e1000_buffer *buffer_info;
3608 unsigned int i, eop;
3609 unsigned int count = 0;
3610 unsigned int total_tx_bytes=0, total_tx_packets=0;
3612 i = tx_ring->next_to_clean;
3613 eop = tx_ring->buffer_info[i].next_to_watch;
3614 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3616 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3617 (count < tx_ring->count)) {
3618 bool cleaned = false;
3619 rmb(); /* read buffer_info after eop_desc */
3620 for ( ; !cleaned; count++) {
3621 tx_desc = E1000_TX_DESC(*tx_ring, i);
3622 buffer_info = &tx_ring->buffer_info[i];
3623 cleaned = (i == eop);
3626 struct sk_buff *skb = buffer_info->skb;
3627 unsigned int segs, bytecount;
3628 segs = skb_shinfo(skb)->gso_segs ?: 1;
3629 /* multiply data chunks by size of headers */
3630 bytecount = ((segs - 1) * skb_headlen(skb)) +
3632 total_tx_packets += segs;
3633 total_tx_bytes += bytecount;
3635 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3636 tx_desc->upper.data = 0;
3638 if (unlikely(++i == tx_ring->count)) i = 0;
3641 eop = tx_ring->buffer_info[i].next_to_watch;
3642 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3645 tx_ring->next_to_clean = i;
3647 #define TX_WAKE_THRESHOLD 32
3648 if (unlikely(count && netif_carrier_ok(netdev) &&
3649 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3650 /* Make sure that anybody stopping the queue after this
3651 * sees the new next_to_clean.
3655 if (netif_queue_stopped(netdev) &&
3656 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3657 netif_wake_queue(netdev);
3658 ++adapter->restart_queue;
3662 if (adapter->detect_tx_hung) {
3663 /* Detect a transmit hang in hardware, this serializes the
3664 * check with the clearing of time_stamp and movement of i */
3665 adapter->detect_tx_hung = false;
3666 if (tx_ring->buffer_info[eop].time_stamp &&
3667 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3668 (adapter->tx_timeout_factor * HZ)) &&
3669 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3671 /* detected Tx unit hang */
3672 e_err(drv, "Detected Tx Unit Hang\n"
3676 " next_to_use <%x>\n"
3677 " next_to_clean <%x>\n"
3678 "buffer_info[next_to_clean]\n"
3679 " time_stamp <%lx>\n"
3680 " next_to_watch <%x>\n"
3682 " next_to_watch.status <%x>\n",
3683 (unsigned long)((tx_ring - adapter->tx_ring) /
3684 sizeof(struct e1000_tx_ring)),
3685 readl(hw->hw_addr + tx_ring->tdh),
3686 readl(hw->hw_addr + tx_ring->tdt),
3687 tx_ring->next_to_use,
3688 tx_ring->next_to_clean,
3689 tx_ring->buffer_info[eop].time_stamp,
3692 eop_desc->upper.fields.status);
3693 netif_stop_queue(netdev);
3696 adapter->total_tx_bytes += total_tx_bytes;
3697 adapter->total_tx_packets += total_tx_packets;
3698 netdev->stats.tx_bytes += total_tx_bytes;
3699 netdev->stats.tx_packets += total_tx_packets;
3700 return count < tx_ring->count;
3704 * e1000_rx_checksum - Receive Checksum Offload for 82543
3705 * @adapter: board private structure
3706 * @status_err: receive descriptor status and error fields
3707 * @csum: receive descriptor csum field
3708 * @sk_buff: socket buffer with received data
3711 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3712 u32 csum, struct sk_buff *skb)
3714 struct e1000_hw *hw = &adapter->hw;
3715 u16 status = (u16)status_err;
3716 u8 errors = (u8)(status_err >> 24);
3718 skb_checksum_none_assert(skb);
3720 /* 82543 or newer only */
3721 if (unlikely(hw->mac_type < e1000_82543)) return;
3722 /* Ignore Checksum bit is set */
3723 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3724 /* TCP/UDP checksum error bit is set */
3725 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3726 /* let the stack verify checksum errors */
3727 adapter->hw_csum_err++;
3730 /* TCP/UDP Checksum has not been calculated */
3731 if (!(status & E1000_RXD_STAT_TCPCS))
3734 /* It must be a TCP or UDP packet with a valid checksum */
3735 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3736 /* TCP checksum is good */
3737 skb->ip_summed = CHECKSUM_UNNECESSARY;
3739 adapter->hw_csum_good++;
3743 * e1000_consume_page - helper function
3745 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3750 skb->data_len += length;
3751 skb->truesize += length;
3755 * e1000_receive_skb - helper function to handle rx indications
3756 * @adapter: board private structure
3757 * @status: descriptor status field as written by hardware
3758 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3759 * @skb: pointer to sk_buff to be indicated to stack
3761 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3762 __le16 vlan, struct sk_buff *skb)
3764 skb->protocol = eth_type_trans(skb, adapter->netdev);
3766 if (status & E1000_RXD_STAT_VP) {
3767 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3769 __vlan_hwaccel_put_tag(skb, vid);
3771 napi_gro_receive(&adapter->napi, skb);
3775 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3776 * @adapter: board private structure
3777 * @rx_ring: ring to clean
3778 * @work_done: amount of napi work completed this call
3779 * @work_to_do: max amount of work allowed for this call to do
3781 * the return value indicates whether actual cleaning was done, there
3782 * is no guarantee that everything was cleaned
3784 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3785 struct e1000_rx_ring *rx_ring,
3786 int *work_done, int work_to_do)
3788 struct e1000_hw *hw = &adapter->hw;
3789 struct net_device *netdev = adapter->netdev;
3790 struct pci_dev *pdev = adapter->pdev;
3791 struct e1000_rx_desc *rx_desc, *next_rxd;
3792 struct e1000_buffer *buffer_info, *next_buffer;
3793 unsigned long irq_flags;
3796 int cleaned_count = 0;
3797 bool cleaned = false;
3798 unsigned int total_rx_bytes=0, total_rx_packets=0;
3800 i = rx_ring->next_to_clean;
3801 rx_desc = E1000_RX_DESC(*rx_ring, i);
3802 buffer_info = &rx_ring->buffer_info[i];
3804 while (rx_desc->status & E1000_RXD_STAT_DD) {
3805 struct sk_buff *skb;
3808 if (*work_done >= work_to_do)
3811 rmb(); /* read descriptor and rx_buffer_info after status DD */
3813 status = rx_desc->status;
3814 skb = buffer_info->skb;
3815 buffer_info->skb = NULL;
3817 if (++i == rx_ring->count) i = 0;
3818 next_rxd = E1000_RX_DESC(*rx_ring, i);
3821 next_buffer = &rx_ring->buffer_info[i];
3825 dma_unmap_page(&pdev->dev, buffer_info->dma,
3826 buffer_info->length, DMA_FROM_DEVICE);
3827 buffer_info->dma = 0;
3829 length = le16_to_cpu(rx_desc->length);
3831 /* errors is only valid for DD + EOP descriptors */
3832 if (unlikely((status & E1000_RXD_STAT_EOP) &&
3833 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
3834 u8 last_byte = *(skb->data + length - 1);
3835 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
3837 spin_lock_irqsave(&adapter->stats_lock,
3839 e1000_tbi_adjust_stats(hw, &adapter->stats,
3841 spin_unlock_irqrestore(&adapter->stats_lock,
3845 /* recycle both page and skb */
3846 buffer_info->skb = skb;
3847 /* an error means any chain goes out the window
3849 if (rx_ring->rx_skb_top)
3850 dev_kfree_skb(rx_ring->rx_skb_top);
3851 rx_ring->rx_skb_top = NULL;
3856 #define rxtop rx_ring->rx_skb_top
3857 if (!(status & E1000_RXD_STAT_EOP)) {
3858 /* this descriptor is only the beginning (or middle) */
3860 /* this is the beginning of a chain */
3862 skb_fill_page_desc(rxtop, 0, buffer_info->page,
3865 /* this is the middle of a chain */
3866 skb_fill_page_desc(rxtop,
3867 skb_shinfo(rxtop)->nr_frags,
3868 buffer_info->page, 0, length);
3869 /* re-use the skb, only consumed the page */
3870 buffer_info->skb = skb;
3872 e1000_consume_page(buffer_info, rxtop, length);
3876 /* end of the chain */
3877 skb_fill_page_desc(rxtop,
3878 skb_shinfo(rxtop)->nr_frags,
3879 buffer_info->page, 0, length);
3880 /* re-use the current skb, we only consumed the
3882 buffer_info->skb = skb;
3885 e1000_consume_page(buffer_info, skb, length);
3887 /* no chain, got EOP, this buf is the packet
3888 * copybreak to save the put_page/alloc_page */
3889 if (length <= copybreak &&
3890 skb_tailroom(skb) >= length) {
3892 vaddr = kmap_atomic(buffer_info->page,
3893 KM_SKB_DATA_SOFTIRQ);
3894 memcpy(skb_tail_pointer(skb), vaddr, length);
3895 kunmap_atomic(vaddr,
3896 KM_SKB_DATA_SOFTIRQ);
3897 /* re-use the page, so don't erase
3898 * buffer_info->page */
3899 skb_put(skb, length);
3901 skb_fill_page_desc(skb, 0,
3902 buffer_info->page, 0,
3904 e1000_consume_page(buffer_info, skb,
3910 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3911 e1000_rx_checksum(adapter,
3913 ((u32)(rx_desc->errors) << 24),
3914 le16_to_cpu(rx_desc->csum), skb);
3916 pskb_trim(skb, skb->len - 4);
3918 /* probably a little skewed due to removing CRC */
3919 total_rx_bytes += skb->len;
3922 /* eth type trans needs skb->data to point to something */
3923 if (!pskb_may_pull(skb, ETH_HLEN)) {
3924 e_err(drv, "pskb_may_pull failed.\n");
3929 e1000_receive_skb(adapter, status, rx_desc->special, skb);
3932 rx_desc->status = 0;
3934 /* return some buffers to hardware, one at a time is too slow */
3935 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3936 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3940 /* use prefetched values */
3942 buffer_info = next_buffer;
3944 rx_ring->next_to_clean = i;
3946 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3948 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3950 adapter->total_rx_packets += total_rx_packets;
3951 adapter->total_rx_bytes += total_rx_bytes;
3952 netdev->stats.rx_bytes += total_rx_bytes;
3953 netdev->stats.rx_packets += total_rx_packets;
3958 * this should improve performance for small packets with large amounts
3959 * of reassembly being done in the stack
3961 static void e1000_check_copybreak(struct net_device *netdev,
3962 struct e1000_buffer *buffer_info,
3963 u32 length, struct sk_buff **skb)
3965 struct sk_buff *new_skb;
3967 if (length > copybreak)
3970 new_skb = netdev_alloc_skb_ip_align(netdev, length);
3974 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
3975 (*skb)->data - NET_IP_ALIGN,
3976 length + NET_IP_ALIGN);
3977 /* save the skb in buffer_info as good */
3978 buffer_info->skb = *skb;
3983 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3984 * @adapter: board private structure
3985 * @rx_ring: ring to clean
3986 * @work_done: amount of napi work completed this call
3987 * @work_to_do: max amount of work allowed for this call to do
3989 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3990 struct e1000_rx_ring *rx_ring,
3991 int *work_done, int work_to_do)
3993 struct e1000_hw *hw = &adapter->hw;
3994 struct net_device *netdev = adapter->netdev;
3995 struct pci_dev *pdev = adapter->pdev;
3996 struct e1000_rx_desc *rx_desc, *next_rxd;
3997 struct e1000_buffer *buffer_info, *next_buffer;
3998 unsigned long flags;
4001 int cleaned_count = 0;
4002 bool cleaned = false;
4003 unsigned int total_rx_bytes=0, total_rx_packets=0;
4005 i = rx_ring->next_to_clean;
4006 rx_desc = E1000_RX_DESC(*rx_ring, i);
4007 buffer_info = &rx_ring->buffer_info[i];
4009 while (rx_desc->status & E1000_RXD_STAT_DD) {
4010 struct sk_buff *skb;
4013 if (*work_done >= work_to_do)
4016 rmb(); /* read descriptor and rx_buffer_info after status DD */
4018 status = rx_desc->status;
4019 skb = buffer_info->skb;
4020 buffer_info->skb = NULL;
4022 prefetch(skb->data - NET_IP_ALIGN);
4024 if (++i == rx_ring->count) i = 0;
4025 next_rxd = E1000_RX_DESC(*rx_ring, i);
4028 next_buffer = &rx_ring->buffer_info[i];
4032 dma_unmap_single(&pdev->dev, buffer_info->dma,
4033 buffer_info->length, DMA_FROM_DEVICE);
4034 buffer_info->dma = 0;
4036 length = le16_to_cpu(rx_desc->length);
4037 /* !EOP means multiple descriptors were used to store a single
4038 * packet, if thats the case we need to toss it. In fact, we
4039 * to toss every packet with the EOP bit clear and the next
4040 * frame that _does_ have the EOP bit set, as it is by
4041 * definition only a frame fragment
4043 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4044 adapter->discarding = true;
4046 if (adapter->discarding) {
4047 /* All receives must fit into a single buffer */
4048 e_dbg("Receive packet consumed multiple buffers\n");
4050 buffer_info->skb = skb;
4051 if (status & E1000_RXD_STAT_EOP)
4052 adapter->discarding = false;
4056 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4057 u8 last_byte = *(skb->data + length - 1);
4058 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4060 spin_lock_irqsave(&adapter->stats_lock, flags);
4061 e1000_tbi_adjust_stats(hw, &adapter->stats,
4063 spin_unlock_irqrestore(&adapter->stats_lock,
4068 buffer_info->skb = skb;
4073 /* adjust length to remove Ethernet CRC, this must be
4074 * done after the TBI_ACCEPT workaround above */
4077 /* probably a little skewed due to removing CRC */
4078 total_rx_bytes += length;
4081 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4083 skb_put(skb, length);
4085 /* Receive Checksum Offload */
4086 e1000_rx_checksum(adapter,
4088 ((u32)(rx_desc->errors) << 24),
4089 le16_to_cpu(rx_desc->csum), skb);
4091 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4094 rx_desc->status = 0;
4096 /* return some buffers to hardware, one at a time is too slow */
4097 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4098 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4102 /* use prefetched values */
4104 buffer_info = next_buffer;
4106 rx_ring->next_to_clean = i;
4108 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4110 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4112 adapter->total_rx_packets += total_rx_packets;
4113 adapter->total_rx_bytes += total_rx_bytes;
4114 netdev->stats.rx_bytes += total_rx_bytes;
4115 netdev->stats.rx_packets += total_rx_packets;
4120 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4121 * @adapter: address of board private structure
4122 * @rx_ring: pointer to receive ring structure
4123 * @cleaned_count: number of buffers to allocate this pass
4127 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4128 struct e1000_rx_ring *rx_ring, int cleaned_count)
4130 struct net_device *netdev = adapter->netdev;
4131 struct pci_dev *pdev = adapter->pdev;
4132 struct e1000_rx_desc *rx_desc;
4133 struct e1000_buffer *buffer_info;
4134 struct sk_buff *skb;
4136 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4138 i = rx_ring->next_to_use;
4139 buffer_info = &rx_ring->buffer_info[i];
4141 while (cleaned_count--) {
4142 skb = buffer_info->skb;
4148 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4149 if (unlikely(!skb)) {
4150 /* Better luck next round */
4151 adapter->alloc_rx_buff_failed++;
4155 /* Fix for errata 23, can't cross 64kB boundary */
4156 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4157 struct sk_buff *oldskb = skb;
4158 e_err(rx_err, "skb align check failed: %u bytes at "
4159 "%p\n", bufsz, skb->data);
4160 /* Try again, without freeing the previous */
4161 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4162 /* Failed allocation, critical failure */
4164 dev_kfree_skb(oldskb);
4165 adapter->alloc_rx_buff_failed++;
4169 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4172 dev_kfree_skb(oldskb);
4173 break; /* while (cleaned_count--) */
4176 /* Use new allocation */
4177 dev_kfree_skb(oldskb);
4179 buffer_info->skb = skb;
4180 buffer_info->length = adapter->rx_buffer_len;
4182 /* allocate a new page if necessary */
4183 if (!buffer_info->page) {
4184 buffer_info->page = alloc_page(GFP_ATOMIC);
4185 if (unlikely(!buffer_info->page)) {
4186 adapter->alloc_rx_buff_failed++;
4191 if (!buffer_info->dma) {
4192 buffer_info->dma = dma_map_page(&pdev->dev,
4193 buffer_info->page, 0,
4194 buffer_info->length,
4196 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4197 put_page(buffer_info->page);
4199 buffer_info->page = NULL;
4200 buffer_info->skb = NULL;
4201 buffer_info->dma = 0;
4202 adapter->alloc_rx_buff_failed++;
4203 break; /* while !buffer_info->skb */
4207 rx_desc = E1000_RX_DESC(*rx_ring, i);
4208 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4210 if (unlikely(++i == rx_ring->count))
4212 buffer_info = &rx_ring->buffer_info[i];
4215 if (likely(rx_ring->next_to_use != i)) {
4216 rx_ring->next_to_use = i;
4217 if (unlikely(i-- == 0))
4218 i = (rx_ring->count - 1);
4220 /* Force memory writes to complete before letting h/w
4221 * know there are new descriptors to fetch. (Only
4222 * applicable for weak-ordered memory model archs,
4223 * such as IA-64). */
4225 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4230 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4231 * @adapter: address of board private structure
4234 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4235 struct e1000_rx_ring *rx_ring,
4238 struct e1000_hw *hw = &adapter->hw;
4239 struct net_device *netdev = adapter->netdev;
4240 struct pci_dev *pdev = adapter->pdev;
4241 struct e1000_rx_desc *rx_desc;
4242 struct e1000_buffer *buffer_info;
4243 struct sk_buff *skb;
4245 unsigned int bufsz = adapter->rx_buffer_len;
4247 i = rx_ring->next_to_use;
4248 buffer_info = &rx_ring->buffer_info[i];
4250 while (cleaned_count--) {
4251 skb = buffer_info->skb;
4257 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4258 if (unlikely(!skb)) {
4259 /* Better luck next round */
4260 adapter->alloc_rx_buff_failed++;
4264 /* Fix for errata 23, can't cross 64kB boundary */
4265 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4266 struct sk_buff *oldskb = skb;
4267 e_err(rx_err, "skb align check failed: %u bytes at "
4268 "%p\n", bufsz, skb->data);
4269 /* Try again, without freeing the previous */
4270 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4271 /* Failed allocation, critical failure */
4273 dev_kfree_skb(oldskb);
4274 adapter->alloc_rx_buff_failed++;
4278 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4281 dev_kfree_skb(oldskb);
4282 adapter->alloc_rx_buff_failed++;
4283 break; /* while !buffer_info->skb */
4286 /* Use new allocation */
4287 dev_kfree_skb(oldskb);
4289 buffer_info->skb = skb;
4290 buffer_info->length = adapter->rx_buffer_len;
4292 buffer_info->dma = dma_map_single(&pdev->dev,
4294 buffer_info->length,
4296 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4298 buffer_info->skb = NULL;
4299 buffer_info->dma = 0;
4300 adapter->alloc_rx_buff_failed++;
4301 break; /* while !buffer_info->skb */
4305 * XXX if it was allocated cleanly it will never map to a
4309 /* Fix for errata 23, can't cross 64kB boundary */
4310 if (!e1000_check_64k_bound(adapter,
4311 (void *)(unsigned long)buffer_info->dma,
4312 adapter->rx_buffer_len)) {
4313 e_err(rx_err, "dma align check failed: %u bytes at "
4314 "%p\n", adapter->rx_buffer_len,
4315 (void *)(unsigned long)buffer_info->dma);
4317 buffer_info->skb = NULL;
4319 dma_unmap_single(&pdev->dev, buffer_info->dma,
4320 adapter->rx_buffer_len,
4322 buffer_info->dma = 0;
4324 adapter->alloc_rx_buff_failed++;
4325 break; /* while !buffer_info->skb */
4327 rx_desc = E1000_RX_DESC(*rx_ring, i);
4328 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4330 if (unlikely(++i == rx_ring->count))
4332 buffer_info = &rx_ring->buffer_info[i];
4335 if (likely(rx_ring->next_to_use != i)) {
4336 rx_ring->next_to_use = i;
4337 if (unlikely(i-- == 0))
4338 i = (rx_ring->count - 1);
4340 /* Force memory writes to complete before letting h/w
4341 * know there are new descriptors to fetch. (Only
4342 * applicable for weak-ordered memory model archs,
4343 * such as IA-64). */
4345 writel(i, hw->hw_addr + rx_ring->rdt);
4350 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4354 static void e1000_smartspeed(struct e1000_adapter *adapter)
4356 struct e1000_hw *hw = &adapter->hw;
4360 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4361 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4364 if (adapter->smartspeed == 0) {
4365 /* If Master/Slave config fault is asserted twice,
4366 * we assume back-to-back */
4367 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4368 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4369 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4370 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4371 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4372 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4373 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4374 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4376 adapter->smartspeed++;
4377 if (!e1000_phy_setup_autoneg(hw) &&
4378 !e1000_read_phy_reg(hw, PHY_CTRL,
4380 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4381 MII_CR_RESTART_AUTO_NEG);
4382 e1000_write_phy_reg(hw, PHY_CTRL,
4387 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4388 /* If still no link, perhaps using 2/3 pair cable */
4389 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4390 phy_ctrl |= CR_1000T_MS_ENABLE;
4391 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4392 if (!e1000_phy_setup_autoneg(hw) &&
4393 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4394 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4395 MII_CR_RESTART_AUTO_NEG);
4396 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4399 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4400 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4401 adapter->smartspeed = 0;
4411 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4417 return e1000_mii_ioctl(netdev, ifr, cmd);
4430 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4433 struct e1000_adapter *adapter = netdev_priv(netdev);
4434 struct e1000_hw *hw = &adapter->hw;
4435 struct mii_ioctl_data *data = if_mii(ifr);
4438 unsigned long flags;
4440 if (hw->media_type != e1000_media_type_copper)
4445 data->phy_id = hw->phy_addr;
4448 spin_lock_irqsave(&adapter->stats_lock, flags);
4449 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4451 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4454 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4457 if (data->reg_num & ~(0x1F))
4459 mii_reg = data->val_in;
4460 spin_lock_irqsave(&adapter->stats_lock, flags);
4461 if (e1000_write_phy_reg(hw, data->reg_num,
4463 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4466 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4467 if (hw->media_type == e1000_media_type_copper) {
4468 switch (data->reg_num) {
4470 if (mii_reg & MII_CR_POWER_DOWN)
4472 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4474 hw->autoneg_advertised = 0x2F;
4479 else if (mii_reg & 0x2000)
4483 retval = e1000_set_spd_dplx(
4491 if (netif_running(adapter->netdev))
4492 e1000_reinit_locked(adapter);
4494 e1000_reset(adapter);
4496 case M88E1000_PHY_SPEC_CTRL:
4497 case M88E1000_EXT_PHY_SPEC_CTRL:
4498 if (e1000_phy_reset(hw))
4503 switch (data->reg_num) {
4505 if (mii_reg & MII_CR_POWER_DOWN)
4507 if (netif_running(adapter->netdev))
4508 e1000_reinit_locked(adapter);
4510 e1000_reset(adapter);
4518 return E1000_SUCCESS;
4521 void e1000_pci_set_mwi(struct e1000_hw *hw)
4523 struct e1000_adapter *adapter = hw->back;
4524 int ret_val = pci_set_mwi(adapter->pdev);
4527 e_err(probe, "Error in setting MWI\n");
4530 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4532 struct e1000_adapter *adapter = hw->back;
4534 pci_clear_mwi(adapter->pdev);
4537 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4539 struct e1000_adapter *adapter = hw->back;
4540 return pcix_get_mmrbc(adapter->pdev);
4543 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4545 struct e1000_adapter *adapter = hw->back;
4546 pcix_set_mmrbc(adapter->pdev, mmrbc);
4549 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4554 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4558 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4563 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4566 struct e1000_hw *hw = &adapter->hw;
4569 if (!test_bit(__E1000_DOWN, &adapter->flags))
4570 e1000_irq_disable(adapter);
4573 /* enable VLAN receive filtering */
4575 rctl &= ~E1000_RCTL_CFIEN;
4576 if (!(adapter->netdev->flags & IFF_PROMISC))
4577 rctl |= E1000_RCTL_VFE;
4579 e1000_update_mng_vlan(adapter);
4581 /* disable VLAN receive filtering */
4583 rctl &= ~E1000_RCTL_VFE;
4587 if (!test_bit(__E1000_DOWN, &adapter->flags))
4588 e1000_irq_enable(adapter);
4591 static void e1000_vlan_mode(struct net_device *netdev, u32 features)
4593 struct e1000_adapter *adapter = netdev_priv(netdev);
4594 struct e1000_hw *hw = &adapter->hw;
4597 if (!test_bit(__E1000_DOWN, &adapter->flags))
4598 e1000_irq_disable(adapter);
4601 if (features & NETIF_F_HW_VLAN_RX) {
4602 /* enable VLAN tag insert/strip */
4603 ctrl |= E1000_CTRL_VME;
4605 /* disable VLAN tag insert/strip */
4606 ctrl &= ~E1000_CTRL_VME;
4610 if (!test_bit(__E1000_DOWN, &adapter->flags))
4611 e1000_irq_enable(adapter);
4614 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4616 struct e1000_adapter *adapter = netdev_priv(netdev);
4617 struct e1000_hw *hw = &adapter->hw;
4620 if ((hw->mng_cookie.status &
4621 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4622 (vid == adapter->mng_vlan_id))
4625 if (!e1000_vlan_used(adapter))
4626 e1000_vlan_filter_on_off(adapter, true);
4628 /* add VID to filter table */
4629 index = (vid >> 5) & 0x7F;
4630 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4631 vfta |= (1 << (vid & 0x1F));
4632 e1000_write_vfta(hw, index, vfta);
4634 set_bit(vid, adapter->active_vlans);
4637 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4639 struct e1000_adapter *adapter = netdev_priv(netdev);
4640 struct e1000_hw *hw = &adapter->hw;
4643 if (!test_bit(__E1000_DOWN, &adapter->flags))
4644 e1000_irq_disable(adapter);
4645 if (!test_bit(__E1000_DOWN, &adapter->flags))
4646 e1000_irq_enable(adapter);
4648 /* remove VID from filter table */
4649 index = (vid >> 5) & 0x7F;
4650 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4651 vfta &= ~(1 << (vid & 0x1F));
4652 e1000_write_vfta(hw, index, vfta);
4654 clear_bit(vid, adapter->active_vlans);
4656 if (!e1000_vlan_used(adapter))
4657 e1000_vlan_filter_on_off(adapter, false);
4660 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4664 if (!e1000_vlan_used(adapter))
4667 e1000_vlan_filter_on_off(adapter, true);
4668 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4669 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4672 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4674 struct e1000_hw *hw = &adapter->hw;
4678 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4679 * for the switch() below to work */
4680 if ((spd & 1) || (dplx & ~1))
4683 /* Fiber NICs only allow 1000 gbps Full duplex */
4684 if ((hw->media_type == e1000_media_type_fiber) &&
4685 spd != SPEED_1000 &&
4686 dplx != DUPLEX_FULL)
4689 switch (spd + dplx) {
4690 case SPEED_10 + DUPLEX_HALF:
4691 hw->forced_speed_duplex = e1000_10_half;
4693 case SPEED_10 + DUPLEX_FULL:
4694 hw->forced_speed_duplex = e1000_10_full;
4696 case SPEED_100 + DUPLEX_HALF:
4697 hw->forced_speed_duplex = e1000_100_half;
4699 case SPEED_100 + DUPLEX_FULL:
4700 hw->forced_speed_duplex = e1000_100_full;
4702 case SPEED_1000 + DUPLEX_FULL:
4704 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4706 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4713 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4717 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4719 struct net_device *netdev = pci_get_drvdata(pdev);
4720 struct e1000_adapter *adapter = netdev_priv(netdev);
4721 struct e1000_hw *hw = &adapter->hw;
4722 u32 ctrl, ctrl_ext, rctl, status;
4723 u32 wufc = adapter->wol;
4728 netif_device_detach(netdev);
4730 if (netif_running(netdev)) {
4731 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4732 e1000_down(adapter);
4736 retval = pci_save_state(pdev);
4741 status = er32(STATUS);
4742 if (status & E1000_STATUS_LU)
4743 wufc &= ~E1000_WUFC_LNKC;
4746 e1000_setup_rctl(adapter);
4747 e1000_set_rx_mode(netdev);
4749 /* turn on all-multi mode if wake on multicast is enabled */
4750 if (wufc & E1000_WUFC_MC) {
4752 rctl |= E1000_RCTL_MPE;
4756 if (hw->mac_type >= e1000_82540) {
4758 /* advertise wake from D3Cold */
4759 #define E1000_CTRL_ADVD3WUC 0x00100000
4760 /* phy power management enable */
4761 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4762 ctrl |= E1000_CTRL_ADVD3WUC |
4763 E1000_CTRL_EN_PHY_PWR_MGMT;
4767 if (hw->media_type == e1000_media_type_fiber ||
4768 hw->media_type == e1000_media_type_internal_serdes) {
4769 /* keep the laser running in D3 */
4770 ctrl_ext = er32(CTRL_EXT);
4771 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4772 ew32(CTRL_EXT, ctrl_ext);
4775 ew32(WUC, E1000_WUC_PME_EN);
4782 e1000_release_manageability(adapter);
4784 *enable_wake = !!wufc;
4786 /* make sure adapter isn't asleep if manageability is enabled */
4787 if (adapter->en_mng_pt)
4788 *enable_wake = true;
4790 if (netif_running(netdev))
4791 e1000_free_irq(adapter);
4793 pci_disable_device(pdev);
4799 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4804 retval = __e1000_shutdown(pdev, &wake);
4809 pci_prepare_to_sleep(pdev);
4811 pci_wake_from_d3(pdev, false);
4812 pci_set_power_state(pdev, PCI_D3hot);
4818 static int e1000_resume(struct pci_dev *pdev)
4820 struct net_device *netdev = pci_get_drvdata(pdev);
4821 struct e1000_adapter *adapter = netdev_priv(netdev);
4822 struct e1000_hw *hw = &adapter->hw;
4825 pci_set_power_state(pdev, PCI_D0);
4826 pci_restore_state(pdev);
4827 pci_save_state(pdev);
4829 if (adapter->need_ioport)
4830 err = pci_enable_device(pdev);
4832 err = pci_enable_device_mem(pdev);
4834 pr_err("Cannot enable PCI device from suspend\n");
4837 pci_set_master(pdev);
4839 pci_enable_wake(pdev, PCI_D3hot, 0);
4840 pci_enable_wake(pdev, PCI_D3cold, 0);
4842 if (netif_running(netdev)) {
4843 err = e1000_request_irq(adapter);
4848 e1000_power_up_phy(adapter);
4849 e1000_reset(adapter);
4852 e1000_init_manageability(adapter);
4854 if (netif_running(netdev))
4857 netif_device_attach(netdev);
4863 static void e1000_shutdown(struct pci_dev *pdev)
4867 __e1000_shutdown(pdev, &wake);
4869 if (system_state == SYSTEM_POWER_OFF) {
4870 pci_wake_from_d3(pdev, wake);
4871 pci_set_power_state(pdev, PCI_D3hot);
4875 #ifdef CONFIG_NET_POLL_CONTROLLER
4877 * Polling 'interrupt' - used by things like netconsole to send skbs
4878 * without having to re-enable interrupts. It's not called while
4879 * the interrupt routine is executing.
4881 static void e1000_netpoll(struct net_device *netdev)
4883 struct e1000_adapter *adapter = netdev_priv(netdev);
4885 disable_irq(adapter->pdev->irq);
4886 e1000_intr(adapter->pdev->irq, netdev);
4887 enable_irq(adapter->pdev->irq);
4892 * e1000_io_error_detected - called when PCI error is detected
4893 * @pdev: Pointer to PCI device
4894 * @state: The current pci connection state
4896 * This function is called after a PCI bus error affecting
4897 * this device has been detected.
4899 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4900 pci_channel_state_t state)
4902 struct net_device *netdev = pci_get_drvdata(pdev);
4903 struct e1000_adapter *adapter = netdev_priv(netdev);
4905 netif_device_detach(netdev);
4907 if (state == pci_channel_io_perm_failure)
4908 return PCI_ERS_RESULT_DISCONNECT;
4910 if (netif_running(netdev))
4911 e1000_down(adapter);
4912 pci_disable_device(pdev);
4914 /* Request a slot slot reset. */
4915 return PCI_ERS_RESULT_NEED_RESET;
4919 * e1000_io_slot_reset - called after the pci bus has been reset.
4920 * @pdev: Pointer to PCI device
4922 * Restart the card from scratch, as if from a cold-boot. Implementation
4923 * resembles the first-half of the e1000_resume routine.
4925 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4927 struct net_device *netdev = pci_get_drvdata(pdev);
4928 struct e1000_adapter *adapter = netdev_priv(netdev);
4929 struct e1000_hw *hw = &adapter->hw;
4932 if (adapter->need_ioport)
4933 err = pci_enable_device(pdev);
4935 err = pci_enable_device_mem(pdev);
4937 pr_err("Cannot re-enable PCI device after reset.\n");
4938 return PCI_ERS_RESULT_DISCONNECT;
4940 pci_set_master(pdev);
4942 pci_enable_wake(pdev, PCI_D3hot, 0);
4943 pci_enable_wake(pdev, PCI_D3cold, 0);
4945 e1000_reset(adapter);
4948 return PCI_ERS_RESULT_RECOVERED;
4952 * e1000_io_resume - called when traffic can start flowing again.
4953 * @pdev: Pointer to PCI device
4955 * This callback is called when the error recovery driver tells us that
4956 * its OK to resume normal operation. Implementation resembles the
4957 * second-half of the e1000_resume routine.
4959 static void e1000_io_resume(struct pci_dev *pdev)
4961 struct net_device *netdev = pci_get_drvdata(pdev);
4962 struct e1000_adapter *adapter = netdev_priv(netdev);
4964 e1000_init_manageability(adapter);
4966 if (netif_running(netdev)) {
4967 if (e1000_up(adapter)) {
4968 pr_info("can't bring device back up after reset\n");
4973 netif_device_attach(netdev);