1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
36 char e1000_driver_name[] = "e1000";
37 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
38 #define DRV_VERSION "7.3.21-k8-NAPI"
39 const char e1000_driver_version[] = DRV_VERSION;
40 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
42 /* e1000_pci_tbl - PCI Device ID Table
44 * Last entry must be all 0s
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
91 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
93 int e1000_up(struct e1000_adapter *adapter);
94 void e1000_down(struct e1000_adapter *adapter);
95 void e1000_reinit_locked(struct e1000_adapter *adapter);
96 void e1000_reset(struct e1000_adapter *adapter);
97 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
98 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
99 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
100 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
101 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
102 struct e1000_tx_ring *txdr);
103 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
104 struct e1000_rx_ring *rxdr);
105 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
106 struct e1000_tx_ring *tx_ring);
107 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
108 struct e1000_rx_ring *rx_ring);
109 void e1000_update_stats(struct e1000_adapter *adapter);
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
114 static void __devexit e1000_remove(struct pci_dev *pdev);
115 static int e1000_alloc_queues(struct e1000_adapter *adapter);
116 static int e1000_sw_init(struct e1000_adapter *adapter);
117 static int e1000_open(struct net_device *netdev);
118 static int e1000_close(struct net_device *netdev);
119 static void e1000_configure_tx(struct e1000_adapter *adapter);
120 static void e1000_configure_rx(struct e1000_adapter *adapter);
121 static void e1000_setup_rctl(struct e1000_adapter *adapter);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
124 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
125 struct e1000_tx_ring *tx_ring);
126 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
127 struct e1000_rx_ring *rx_ring);
128 static void e1000_set_rx_mode(struct net_device *netdev);
129 static void e1000_update_phy_info_task(struct work_struct *work);
130 static void e1000_watchdog(struct work_struct *work);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work);
132 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
133 struct net_device *netdev);
134 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
135 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
136 static int e1000_set_mac(struct net_device *netdev, void *p);
137 static irqreturn_t e1000_intr(int irq, void *data);
138 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
139 struct e1000_tx_ring *tx_ring);
140 static int e1000_clean(struct napi_struct *napi, int budget);
141 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
142 struct e1000_rx_ring *rx_ring,
143 int *work_done, int work_to_do);
144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
145 struct e1000_rx_ring *rx_ring,
146 int *work_done, int work_to_do);
147 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
148 struct e1000_rx_ring *rx_ring,
150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
151 struct e1000_rx_ring *rx_ring,
153 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
154 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
156 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
157 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
158 static void e1000_tx_timeout(struct net_device *dev);
159 static void e1000_reset_task(struct work_struct *work);
160 static void e1000_smartspeed(struct e1000_adapter *adapter);
161 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
162 struct sk_buff *skb);
164 static bool e1000_vlan_used(struct e1000_adapter *adapter);
165 static void e1000_vlan_mode(struct net_device *netdev,
166 netdev_features_t features);
167 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid);
168 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid);
169 static void e1000_restore_vlan(struct e1000_adapter *adapter);
172 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
173 static int e1000_resume(struct pci_dev *pdev);
175 static void e1000_shutdown(struct pci_dev *pdev);
177 #ifdef CONFIG_NET_POLL_CONTROLLER
178 /* for netdump / net console */
179 static void e1000_netpoll (struct net_device *netdev);
182 #define COPYBREAK_DEFAULT 256
183 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT;
184 module_param(copybreak, uint, 0644);
185 MODULE_PARM_DESC(copybreak,
186 "Maximum size of packet that is copied to a new buffer on receive");
188 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
189 pci_channel_state_t state);
190 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev);
191 static void e1000_io_resume(struct pci_dev *pdev);
193 static struct pci_error_handlers e1000_err_handler = {
194 .error_detected = e1000_io_error_detected,
195 .slot_reset = e1000_io_slot_reset,
196 .resume = e1000_io_resume,
199 static struct pci_driver e1000_driver = {
200 .name = e1000_driver_name,
201 .id_table = e1000_pci_tbl,
202 .probe = e1000_probe,
203 .remove = __devexit_p(e1000_remove),
205 /* Power Management Hooks */
206 .suspend = e1000_suspend,
207 .resume = e1000_resume,
209 .shutdown = e1000_shutdown,
210 .err_handler = &e1000_err_handler
213 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
214 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
215 MODULE_LICENSE("GPL");
216 MODULE_VERSION(DRV_VERSION);
218 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
219 module_param(debug, int, 0);
220 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
223 * e1000_get_hw_dev - return device
224 * used by hardware layer to print debugging information
227 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw)
229 struct e1000_adapter *adapter = hw->back;
230 return adapter->netdev;
234 * e1000_init_module - Driver Registration Routine
236 * e1000_init_module is the first routine called when the driver is
237 * loaded. All it does is register with the PCI subsystem.
240 static int __init e1000_init_module(void)
243 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version);
245 pr_info("%s\n", e1000_copyright);
247 ret = pci_register_driver(&e1000_driver);
248 if (copybreak != COPYBREAK_DEFAULT) {
250 pr_info("copybreak disabled\n");
252 pr_info("copybreak enabled for "
253 "packets <= %u bytes\n", copybreak);
258 module_init(e1000_init_module);
261 * e1000_exit_module - Driver Exit Cleanup Routine
263 * e1000_exit_module is called just before the driver is removed
267 static void __exit e1000_exit_module(void)
269 pci_unregister_driver(&e1000_driver);
272 module_exit(e1000_exit_module);
274 static int e1000_request_irq(struct e1000_adapter *adapter)
276 struct net_device *netdev = adapter->netdev;
277 irq_handler_t handler = e1000_intr;
278 int irq_flags = IRQF_SHARED;
281 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
284 e_err(probe, "Unable to allocate interrupt Error: %d\n", err);
290 static void e1000_free_irq(struct e1000_adapter *adapter)
292 struct net_device *netdev = adapter->netdev;
294 free_irq(adapter->pdev->irq, netdev);
298 * e1000_irq_disable - Mask off interrupt generation on the NIC
299 * @adapter: board private structure
302 static void e1000_irq_disable(struct e1000_adapter *adapter)
304 struct e1000_hw *hw = &adapter->hw;
308 synchronize_irq(adapter->pdev->irq);
312 * e1000_irq_enable - Enable default interrupt generation settings
313 * @adapter: board private structure
316 static void e1000_irq_enable(struct e1000_adapter *adapter)
318 struct e1000_hw *hw = &adapter->hw;
320 ew32(IMS, IMS_ENABLE_MASK);
324 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
326 struct e1000_hw *hw = &adapter->hw;
327 struct net_device *netdev = adapter->netdev;
328 u16 vid = hw->mng_cookie.vlan_id;
329 u16 old_vid = adapter->mng_vlan_id;
331 if (!e1000_vlan_used(adapter))
334 if (!test_bit(vid, adapter->active_vlans)) {
335 if (hw->mng_cookie.status &
336 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
337 e1000_vlan_rx_add_vid(netdev, vid);
338 adapter->mng_vlan_id = vid;
340 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
342 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
344 !test_bit(old_vid, adapter->active_vlans))
345 e1000_vlan_rx_kill_vid(netdev, old_vid);
347 adapter->mng_vlan_id = vid;
351 static void e1000_init_manageability(struct e1000_adapter *adapter)
353 struct e1000_hw *hw = &adapter->hw;
355 if (adapter->en_mng_pt) {
356 u32 manc = er32(MANC);
358 /* disable hardware interception of ARP */
359 manc &= ~(E1000_MANC_ARP_EN);
365 static void e1000_release_manageability(struct e1000_adapter *adapter)
367 struct e1000_hw *hw = &adapter->hw;
369 if (adapter->en_mng_pt) {
370 u32 manc = er32(MANC);
372 /* re-enable hardware interception of ARP */
373 manc |= E1000_MANC_ARP_EN;
380 * e1000_configure - configure the hardware for RX and TX
381 * @adapter = private board structure
383 static void e1000_configure(struct e1000_adapter *adapter)
385 struct net_device *netdev = adapter->netdev;
388 e1000_set_rx_mode(netdev);
390 e1000_restore_vlan(adapter);
391 e1000_init_manageability(adapter);
393 e1000_configure_tx(adapter);
394 e1000_setup_rctl(adapter);
395 e1000_configure_rx(adapter);
396 /* call E1000_DESC_UNUSED which always leaves
397 * at least 1 descriptor unused to make sure
398 * next_to_use != next_to_clean */
399 for (i = 0; i < adapter->num_rx_queues; i++) {
400 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
401 adapter->alloc_rx_buf(adapter, ring,
402 E1000_DESC_UNUSED(ring));
406 int e1000_up(struct e1000_adapter *adapter)
408 struct e1000_hw *hw = &adapter->hw;
410 /* hardware has been reset, we need to reload some things */
411 e1000_configure(adapter);
413 clear_bit(__E1000_DOWN, &adapter->flags);
415 napi_enable(&adapter->napi);
417 e1000_irq_enable(adapter);
419 netif_wake_queue(adapter->netdev);
421 /* fire a link change interrupt to start the watchdog */
422 ew32(ICS, E1000_ICS_LSC);
427 * e1000_power_up_phy - restore link in case the phy was powered down
428 * @adapter: address of board private structure
430 * The phy may be powered down to save power and turn off link when the
431 * driver is unloaded and wake on lan is not enabled (among others)
432 * *** this routine MUST be followed by a call to e1000_reset ***
436 void e1000_power_up_phy(struct e1000_adapter *adapter)
438 struct e1000_hw *hw = &adapter->hw;
441 /* Just clear the power down bit to wake the phy back up */
442 if (hw->media_type == e1000_media_type_copper) {
443 /* according to the manual, the phy will retain its
444 * settings across a power-down/up cycle */
445 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
446 mii_reg &= ~MII_CR_POWER_DOWN;
447 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
451 static void e1000_power_down_phy(struct e1000_adapter *adapter)
453 struct e1000_hw *hw = &adapter->hw;
455 /* Power down the PHY so no link is implied when interface is down *
456 * The PHY cannot be powered down if any of the following is true *
459 * (c) SoL/IDER session is active */
460 if (!adapter->wol && hw->mac_type >= e1000_82540 &&
461 hw->media_type == e1000_media_type_copper) {
464 switch (hw->mac_type) {
467 case e1000_82545_rev_3:
470 case e1000_82546_rev_3:
472 case e1000_82541_rev_2:
474 case e1000_82547_rev_2:
475 if (er32(MANC) & E1000_MANC_SMBUS_EN)
481 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg);
482 mii_reg |= MII_CR_POWER_DOWN;
483 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg);
490 static void e1000_down_and_stop(struct e1000_adapter *adapter)
492 set_bit(__E1000_DOWN, &adapter->flags);
493 cancel_work_sync(&adapter->reset_task);
494 cancel_delayed_work_sync(&adapter->watchdog_task);
495 cancel_delayed_work_sync(&adapter->phy_info_task);
496 cancel_delayed_work_sync(&adapter->fifo_stall_task);
499 void e1000_down(struct e1000_adapter *adapter)
501 struct e1000_hw *hw = &adapter->hw;
502 struct net_device *netdev = adapter->netdev;
506 /* disable receives in the hardware */
508 ew32(RCTL, rctl & ~E1000_RCTL_EN);
509 /* flush and sleep below */
511 netif_tx_disable(netdev);
513 /* disable transmits in the hardware */
515 tctl &= ~E1000_TCTL_EN;
517 /* flush both disables and wait for them to finish */
521 napi_disable(&adapter->napi);
523 e1000_irq_disable(adapter);
526 * Setting DOWN must be after irq_disable to prevent
527 * a screaming interrupt. Setting DOWN also prevents
528 * tasks from rescheduling.
530 e1000_down_and_stop(adapter);
532 adapter->link_speed = 0;
533 adapter->link_duplex = 0;
534 netif_carrier_off(netdev);
536 e1000_reset(adapter);
537 e1000_clean_all_tx_rings(adapter);
538 e1000_clean_all_rx_rings(adapter);
541 static void e1000_reinit_safe(struct e1000_adapter *adapter)
543 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
545 mutex_lock(&adapter->mutex);
548 mutex_unlock(&adapter->mutex);
549 clear_bit(__E1000_RESETTING, &adapter->flags);
552 void e1000_reinit_locked(struct e1000_adapter *adapter)
554 /* if rtnl_lock is not held the call path is bogus */
556 WARN_ON(in_interrupt());
557 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
561 clear_bit(__E1000_RESETTING, &adapter->flags);
564 void e1000_reset(struct e1000_adapter *adapter)
566 struct e1000_hw *hw = &adapter->hw;
567 u32 pba = 0, tx_space, min_tx_space, min_rx_space;
568 bool legacy_pba_adjust = false;
571 /* Repartition Pba for greater than 9k mtu
572 * To take effect CTRL.RST is required.
575 switch (hw->mac_type) {
576 case e1000_82542_rev2_0:
577 case e1000_82542_rev2_1:
582 case e1000_82541_rev_2:
583 legacy_pba_adjust = true;
587 case e1000_82545_rev_3:
590 case e1000_82546_rev_3:
594 case e1000_82547_rev_2:
595 legacy_pba_adjust = true;
598 case e1000_undefined:
603 if (legacy_pba_adjust) {
604 if (hw->max_frame_size > E1000_RXBUFFER_8192)
605 pba -= 8; /* allocate more FIFO for Tx */
607 if (hw->mac_type == e1000_82547) {
608 adapter->tx_fifo_head = 0;
609 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
610 adapter->tx_fifo_size =
611 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
612 atomic_set(&adapter->tx_fifo_stall, 0);
614 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
615 /* adjust PBA for jumbo frames */
618 /* To maintain wire speed transmits, the Tx FIFO should be
619 * large enough to accommodate two full transmit packets,
620 * rounded up to the next 1KB and expressed in KB. Likewise,
621 * the Rx FIFO should be large enough to accommodate at least
622 * one full receive packet and is similarly rounded up and
623 * expressed in KB. */
625 /* upper 16 bits has Tx packet buffer allocation size in KB */
626 tx_space = pba >> 16;
627 /* lower 16 bits has Rx packet buffer allocation size in KB */
630 * the tx fifo also stores 16 bytes of information about the tx
631 * but don't include ethernet FCS because hardware appends it
633 min_tx_space = (hw->max_frame_size +
634 sizeof(struct e1000_tx_desc) -
636 min_tx_space = ALIGN(min_tx_space, 1024);
638 /* software strips receive CRC, so leave room for it */
639 min_rx_space = hw->max_frame_size;
640 min_rx_space = ALIGN(min_rx_space, 1024);
643 /* If current Tx allocation is less than the min Tx FIFO size,
644 * and the min Tx FIFO size is less than the current Rx FIFO
645 * allocation, take space away from current Rx allocation */
646 if (tx_space < min_tx_space &&
647 ((min_tx_space - tx_space) < pba)) {
648 pba = pba - (min_tx_space - tx_space);
650 /* PCI/PCIx hardware has PBA alignment constraints */
651 switch (hw->mac_type) {
652 case e1000_82545 ... e1000_82546_rev_3:
653 pba &= ~(E1000_PBA_8K - 1);
659 /* if short on rx space, rx wins and must trump tx
660 * adjustment or use Early Receive if available */
661 if (pba < min_rx_space)
669 * flow control settings:
670 * The high water mark must be low enough to fit one full frame
671 * (or the size used for early receive) above it in the Rx FIFO.
672 * Set it to the lower of:
673 * - 90% of the Rx FIFO size, and
674 * - the full Rx FIFO size minus the early receive size (for parts
675 * with ERT support assuming ERT set to E1000_ERT_2048), or
676 * - the full Rx FIFO size minus one full frame
678 hwm = min(((pba << 10) * 9 / 10),
679 ((pba << 10) - hw->max_frame_size));
681 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
682 hw->fc_low_water = hw->fc_high_water - 8;
683 hw->fc_pause_time = E1000_FC_PAUSE_TIME;
685 hw->fc = hw->original_fc;
687 /* Allow time for pending master requests to run */
689 if (hw->mac_type >= e1000_82544)
692 if (e1000_init_hw(hw))
693 e_dev_err("Hardware Error\n");
694 e1000_update_mng_vlan(adapter);
696 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
697 if (hw->mac_type >= e1000_82544 &&
699 hw->autoneg_advertised == ADVERTISE_1000_FULL) {
700 u32 ctrl = er32(CTRL);
701 /* clear phy power management bit if we are in gig only mode,
702 * which if enabled will attempt negotiation to 100Mb, which
703 * can cause a loss of link at power off or driver unload */
704 ctrl &= ~E1000_CTRL_SWDPIN3;
708 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
709 ew32(VET, ETHERNET_IEEE_VLAN_TYPE);
711 e1000_reset_adaptive(hw);
712 e1000_phy_get_info(hw, &adapter->phy_info);
714 e1000_release_manageability(adapter);
718 * Dump the eeprom for users having checksum issues
720 static void e1000_dump_eeprom(struct e1000_adapter *adapter)
722 struct net_device *netdev = adapter->netdev;
723 struct ethtool_eeprom eeprom;
724 const struct ethtool_ops *ops = netdev->ethtool_ops;
727 u16 csum_old, csum_new = 0;
729 eeprom.len = ops->get_eeprom_len(netdev);
732 data = kmalloc(eeprom.len, GFP_KERNEL);
736 ops->get_eeprom(netdev, &eeprom, data);
738 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) +
739 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8);
740 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2)
741 csum_new += data[i] + (data[i + 1] << 8);
742 csum_new = EEPROM_SUM - csum_new;
744 pr_err("/*********************/\n");
745 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old);
746 pr_err("Calculated : 0x%04x\n", csum_new);
748 pr_err("Offset Values\n");
749 pr_err("======== ======\n");
750 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0);
752 pr_err("Include this output when contacting your support provider.\n");
753 pr_err("This is not a software error! Something bad happened to\n");
754 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
755 pr_err("result in further problems, possibly loss of data,\n");
756 pr_err("corruption or system hangs!\n");
757 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
758 pr_err("which is invalid and requires you to set the proper MAC\n");
759 pr_err("address manually before continuing to enable this network\n");
760 pr_err("device. Please inspect the EEPROM dump and report the\n");
761 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
762 pr_err("/*********************/\n");
768 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
769 * @pdev: PCI device information struct
771 * Return true if an adapter needs ioport resources
773 static int e1000_is_need_ioport(struct pci_dev *pdev)
775 switch (pdev->device) {
776 case E1000_DEV_ID_82540EM:
777 case E1000_DEV_ID_82540EM_LOM:
778 case E1000_DEV_ID_82540EP:
779 case E1000_DEV_ID_82540EP_LOM:
780 case E1000_DEV_ID_82540EP_LP:
781 case E1000_DEV_ID_82541EI:
782 case E1000_DEV_ID_82541EI_MOBILE:
783 case E1000_DEV_ID_82541ER:
784 case E1000_DEV_ID_82541ER_LOM:
785 case E1000_DEV_ID_82541GI:
786 case E1000_DEV_ID_82541GI_LF:
787 case E1000_DEV_ID_82541GI_MOBILE:
788 case E1000_DEV_ID_82544EI_COPPER:
789 case E1000_DEV_ID_82544EI_FIBER:
790 case E1000_DEV_ID_82544GC_COPPER:
791 case E1000_DEV_ID_82544GC_LOM:
792 case E1000_DEV_ID_82545EM_COPPER:
793 case E1000_DEV_ID_82545EM_FIBER:
794 case E1000_DEV_ID_82546EB_COPPER:
795 case E1000_DEV_ID_82546EB_FIBER:
796 case E1000_DEV_ID_82546EB_QUAD_COPPER:
803 static netdev_features_t e1000_fix_features(struct net_device *netdev,
804 netdev_features_t features)
807 * Since there is no support for separate rx/tx vlan accel
808 * enable/disable make sure tx flag is always in same state as rx.
810 if (features & NETIF_F_HW_VLAN_RX)
811 features |= NETIF_F_HW_VLAN_TX;
813 features &= ~NETIF_F_HW_VLAN_TX;
818 static int e1000_set_features(struct net_device *netdev,
819 netdev_features_t features)
821 struct e1000_adapter *adapter = netdev_priv(netdev);
822 netdev_features_t changed = features ^ netdev->features;
824 if (changed & NETIF_F_HW_VLAN_RX)
825 e1000_vlan_mode(netdev, features);
827 if (!(changed & NETIF_F_RXCSUM))
830 adapter->rx_csum = !!(features & NETIF_F_RXCSUM);
832 if (netif_running(netdev))
833 e1000_reinit_locked(adapter);
835 e1000_reset(adapter);
840 static const struct net_device_ops e1000_netdev_ops = {
841 .ndo_open = e1000_open,
842 .ndo_stop = e1000_close,
843 .ndo_start_xmit = e1000_xmit_frame,
844 .ndo_get_stats = e1000_get_stats,
845 .ndo_set_rx_mode = e1000_set_rx_mode,
846 .ndo_set_mac_address = e1000_set_mac,
847 .ndo_tx_timeout = e1000_tx_timeout,
848 .ndo_change_mtu = e1000_change_mtu,
849 .ndo_do_ioctl = e1000_ioctl,
850 .ndo_validate_addr = eth_validate_addr,
851 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
852 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
853 #ifdef CONFIG_NET_POLL_CONTROLLER
854 .ndo_poll_controller = e1000_netpoll,
856 .ndo_fix_features = e1000_fix_features,
857 .ndo_set_features = e1000_set_features,
861 * e1000_init_hw_struct - initialize members of hw struct
862 * @adapter: board private struct
863 * @hw: structure used by e1000_hw.c
865 * Factors out initialization of the e1000_hw struct to its own function
866 * that can be called very early at init (just after struct allocation).
867 * Fields are initialized based on PCI device information and
868 * OS network device settings (MTU size).
869 * Returns negative error codes if MAC type setup fails.
871 static int e1000_init_hw_struct(struct e1000_adapter *adapter,
874 struct pci_dev *pdev = adapter->pdev;
876 /* PCI config space info */
877 hw->vendor_id = pdev->vendor;
878 hw->device_id = pdev->device;
879 hw->subsystem_vendor_id = pdev->subsystem_vendor;
880 hw->subsystem_id = pdev->subsystem_device;
881 hw->revision_id = pdev->revision;
883 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
885 hw->max_frame_size = adapter->netdev->mtu +
886 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
887 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
889 /* identify the MAC */
890 if (e1000_set_mac_type(hw)) {
891 e_err(probe, "Unknown MAC Type\n");
895 switch (hw->mac_type) {
900 case e1000_82541_rev_2:
901 case e1000_82547_rev_2:
902 hw->phy_init_script = 1;
906 e1000_set_media_type(hw);
907 e1000_get_bus_info(hw);
909 hw->wait_autoneg_complete = false;
910 hw->tbi_compatibility_en = true;
911 hw->adaptive_ifs = true;
915 if (hw->media_type == e1000_media_type_copper) {
916 hw->mdix = AUTO_ALL_MODES;
917 hw->disable_polarity_correction = false;
918 hw->master_slave = E1000_MASTER_SLAVE;
925 * e1000_probe - Device Initialization Routine
926 * @pdev: PCI device information struct
927 * @ent: entry in e1000_pci_tbl
929 * Returns 0 on success, negative on failure
931 * e1000_probe initializes an adapter identified by a pci_dev structure.
932 * The OS initialization, configuring of the adapter private structure,
933 * and a hardware reset occur.
935 static int __devinit e1000_probe(struct pci_dev *pdev,
936 const struct pci_device_id *ent)
938 struct net_device *netdev;
939 struct e1000_adapter *adapter;
942 static int cards_found = 0;
943 static int global_quad_port_a = 0; /* global ksp3 port a indication */
944 int i, err, pci_using_dac;
947 u16 eeprom_apme_mask = E1000_EEPROM_APME;
948 int bars, need_ioport;
950 /* do not allocate ioport bars when not needed */
951 need_ioport = e1000_is_need_ioport(pdev);
953 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
954 err = pci_enable_device(pdev);
956 bars = pci_select_bars(pdev, IORESOURCE_MEM);
957 err = pci_enable_device_mem(pdev);
962 err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
966 pci_set_master(pdev);
967 err = pci_save_state(pdev);
969 goto err_alloc_etherdev;
972 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
974 goto err_alloc_etherdev;
976 SET_NETDEV_DEV(netdev, &pdev->dev);
978 pci_set_drvdata(pdev, netdev);
979 adapter = netdev_priv(netdev);
980 adapter->netdev = netdev;
981 adapter->pdev = pdev;
982 adapter->msg_enable = (1 << debug) - 1;
983 adapter->bars = bars;
984 adapter->need_ioport = need_ioport;
990 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0);
994 if (adapter->need_ioport) {
995 for (i = BAR_1; i <= BAR_5; i++) {
996 if (pci_resource_len(pdev, i) == 0)
998 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
999 hw->io_base = pci_resource_start(pdev, i);
1005 /* make ready for any if (hw->...) below */
1006 err = e1000_init_hw_struct(adapter, hw);
1011 * there is a workaround being applied below that limits
1012 * 64-bit DMA addresses to 64-bit hardware. There are some
1013 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1016 if ((hw->bus_type == e1000_bus_type_pcix) &&
1017 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1019 * according to DMA-API-HOWTO, coherent calls will always
1020 * succeed if the set call did
1022 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
1025 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1027 pr_err("No usable DMA config, aborting\n");
1030 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1033 netdev->netdev_ops = &e1000_netdev_ops;
1034 e1000_set_ethtool_ops(netdev);
1035 netdev->watchdog_timeo = 5 * HZ;
1036 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
1038 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1040 adapter->bd_number = cards_found;
1042 /* setup the private structure */
1044 err = e1000_sw_init(adapter);
1049 if (hw->mac_type == e1000_ce4100) {
1050 hw->ce4100_gbe_mdio_base_virt =
1051 ioremap(pci_resource_start(pdev, BAR_1),
1052 pci_resource_len(pdev, BAR_1));
1054 if (!hw->ce4100_gbe_mdio_base_virt)
1055 goto err_mdio_ioremap;
1058 if (hw->mac_type >= e1000_82543) {
1059 netdev->hw_features = NETIF_F_SG |
1062 netdev->features = NETIF_F_HW_VLAN_TX |
1063 NETIF_F_HW_VLAN_FILTER;
1066 if ((hw->mac_type >= e1000_82544) &&
1067 (hw->mac_type != e1000_82547))
1068 netdev->hw_features |= NETIF_F_TSO;
1070 netdev->features |= netdev->hw_features;
1071 netdev->hw_features |= NETIF_F_RXCSUM;
1073 if (pci_using_dac) {
1074 netdev->features |= NETIF_F_HIGHDMA;
1075 netdev->vlan_features |= NETIF_F_HIGHDMA;
1078 netdev->vlan_features |= NETIF_F_TSO;
1079 netdev->vlan_features |= NETIF_F_HW_CSUM;
1080 netdev->vlan_features |= NETIF_F_SG;
1082 netdev->priv_flags |= IFF_UNICAST_FLT;
1084 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
1086 /* initialize eeprom parameters */
1087 if (e1000_init_eeprom_params(hw)) {
1088 e_err(probe, "EEPROM initialization failed\n");
1092 /* before reading the EEPROM, reset the controller to
1093 * put the device in a known good starting state */
1097 /* make sure the EEPROM is good */
1098 if (e1000_validate_eeprom_checksum(hw) < 0) {
1099 e_err(probe, "The EEPROM Checksum Is Not Valid\n");
1100 e1000_dump_eeprom(adapter);
1102 * set MAC address to all zeroes to invalidate and temporary
1103 * disable this device for the user. This blocks regular
1104 * traffic while still permitting ethtool ioctls from reaching
1105 * the hardware as well as allowing the user to run the
1106 * interface after manually setting a hw addr using
1109 memset(hw->mac_addr, 0, netdev->addr_len);
1111 /* copy the MAC address out of the EEPROM */
1112 if (e1000_read_mac_addr(hw))
1113 e_err(probe, "EEPROM Read Error\n");
1115 /* don't block initalization here due to bad MAC address */
1116 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len);
1117 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len);
1119 if (!is_valid_ether_addr(netdev->perm_addr))
1120 e_err(probe, "Invalid MAC Address\n");
1123 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog);
1124 INIT_DELAYED_WORK(&adapter->fifo_stall_task,
1125 e1000_82547_tx_fifo_stall_task);
1126 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task);
1127 INIT_WORK(&adapter->reset_task, e1000_reset_task);
1129 e1000_check_options(adapter);
1131 /* Initial Wake on LAN setting
1132 * If APM wake is enabled in the EEPROM,
1133 * enable the ACPI Magic Packet filter
1136 switch (hw->mac_type) {
1137 case e1000_82542_rev2_0:
1138 case e1000_82542_rev2_1:
1142 e1000_read_eeprom(hw,
1143 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
1144 eeprom_apme_mask = E1000_EEPROM_82544_APM;
1147 case e1000_82546_rev_3:
1148 if (er32(STATUS) & E1000_STATUS_FUNC_1){
1149 e1000_read_eeprom(hw,
1150 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
1155 e1000_read_eeprom(hw,
1156 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
1159 if (eeprom_data & eeprom_apme_mask)
1160 adapter->eeprom_wol |= E1000_WUFC_MAG;
1162 /* now that we have the eeprom settings, apply the special cases
1163 * where the eeprom may be wrong or the board simply won't support
1164 * wake on lan on a particular port */
1165 switch (pdev->device) {
1166 case E1000_DEV_ID_82546GB_PCIE:
1167 adapter->eeprom_wol = 0;
1169 case E1000_DEV_ID_82546EB_FIBER:
1170 case E1000_DEV_ID_82546GB_FIBER:
1171 /* Wake events only supported on port A for dual fiber
1172 * regardless of eeprom setting */
1173 if (er32(STATUS) & E1000_STATUS_FUNC_1)
1174 adapter->eeprom_wol = 0;
1176 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
1177 /* if quad port adapter, disable WoL on all but port A */
1178 if (global_quad_port_a != 0)
1179 adapter->eeprom_wol = 0;
1181 adapter->quad_port_a = true;
1182 /* Reset for multiple quad port adapters */
1183 if (++global_quad_port_a == 4)
1184 global_quad_port_a = 0;
1188 /* initialize the wol settings based on the eeprom settings */
1189 adapter->wol = adapter->eeprom_wol;
1190 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
1192 /* Auto detect PHY address */
1193 if (hw->mac_type == e1000_ce4100) {
1194 for (i = 0; i < 32; i++) {
1196 e1000_read_phy_reg(hw, PHY_ID2, &tmp);
1197 if (tmp == 0 || tmp == 0xFF) {
1206 /* reset the hardware with the new settings */
1207 e1000_reset(adapter);
1209 strcpy(netdev->name, "eth%d");
1210 err = register_netdev(netdev);
1214 e1000_vlan_mode(netdev, netdev->features);
1216 /* print bus type/speed/width info */
1217 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n",
1218 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""),
1219 ((hw->bus_speed == e1000_bus_speed_133) ? 133 :
1220 (hw->bus_speed == e1000_bus_speed_120) ? 120 :
1221 (hw->bus_speed == e1000_bus_speed_100) ? 100 :
1222 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33),
1223 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32),
1226 /* carrier off reporting is important to ethtool even BEFORE open */
1227 netif_carrier_off(netdev);
1229 e_info(probe, "Intel(R) PRO/1000 Network Connection\n");
1236 e1000_phy_hw_reset(hw);
1238 if (hw->flash_address)
1239 iounmap(hw->flash_address);
1240 kfree(adapter->tx_ring);
1241 kfree(adapter->rx_ring);
1245 iounmap(hw->ce4100_gbe_mdio_base_virt);
1246 iounmap(hw->hw_addr);
1248 free_netdev(netdev);
1250 pci_release_selected_regions(pdev, bars);
1252 pci_disable_device(pdev);
1257 * e1000_remove - Device Removal Routine
1258 * @pdev: PCI device information struct
1260 * e1000_remove is called by the PCI subsystem to alert the driver
1261 * that it should release a PCI device. The could be caused by a
1262 * Hot-Plug event, or because the driver is going to be removed from
1266 static void __devexit e1000_remove(struct pci_dev *pdev)
1268 struct net_device *netdev = pci_get_drvdata(pdev);
1269 struct e1000_adapter *adapter = netdev_priv(netdev);
1270 struct e1000_hw *hw = &adapter->hw;
1272 e1000_down_and_stop(adapter);
1273 e1000_release_manageability(adapter);
1275 unregister_netdev(netdev);
1277 e1000_phy_hw_reset(hw);
1279 kfree(adapter->tx_ring);
1280 kfree(adapter->rx_ring);
1282 if (hw->mac_type == e1000_ce4100)
1283 iounmap(hw->ce4100_gbe_mdio_base_virt);
1284 iounmap(hw->hw_addr);
1285 if (hw->flash_address)
1286 iounmap(hw->flash_address);
1287 pci_release_selected_regions(pdev, adapter->bars);
1289 free_netdev(netdev);
1291 pci_disable_device(pdev);
1295 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1296 * @adapter: board private structure to initialize
1298 * e1000_sw_init initializes the Adapter private data structure.
1299 * e1000_init_hw_struct MUST be called before this function
1302 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
1304 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1306 adapter->num_tx_queues = 1;
1307 adapter->num_rx_queues = 1;
1309 if (e1000_alloc_queues(adapter)) {
1310 e_err(probe, "Unable to allocate memory for queues\n");
1314 /* Explicitly disable IRQ since the NIC can be in any state. */
1315 e1000_irq_disable(adapter);
1317 spin_lock_init(&adapter->stats_lock);
1318 mutex_init(&adapter->mutex);
1320 set_bit(__E1000_DOWN, &adapter->flags);
1326 * e1000_alloc_queues - Allocate memory for all rings
1327 * @adapter: board private structure to initialize
1329 * We allocate one ring per queue at run-time since we don't know the
1330 * number of queues at compile-time.
1333 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1335 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1336 sizeof(struct e1000_tx_ring), GFP_KERNEL);
1337 if (!adapter->tx_ring)
1340 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1341 sizeof(struct e1000_rx_ring), GFP_KERNEL);
1342 if (!adapter->rx_ring) {
1343 kfree(adapter->tx_ring);
1347 return E1000_SUCCESS;
1351 * e1000_open - Called when a network interface is made active
1352 * @netdev: network interface device structure
1354 * Returns 0 on success, negative value on failure
1356 * The open entry point is called when a network interface is made
1357 * active by the system (IFF_UP). At this point all resources needed
1358 * for transmit and receive operations are allocated, the interrupt
1359 * handler is registered with the OS, the watchdog task is started,
1360 * and the stack is notified that the interface is ready.
1363 static int e1000_open(struct net_device *netdev)
1365 struct e1000_adapter *adapter = netdev_priv(netdev);
1366 struct e1000_hw *hw = &adapter->hw;
1369 /* disallow open during test */
1370 if (test_bit(__E1000_TESTING, &adapter->flags))
1373 netif_carrier_off(netdev);
1375 /* allocate transmit descriptors */
1376 err = e1000_setup_all_tx_resources(adapter);
1380 /* allocate receive descriptors */
1381 err = e1000_setup_all_rx_resources(adapter);
1385 e1000_power_up_phy(adapter);
1387 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1388 if ((hw->mng_cookie.status &
1389 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1390 e1000_update_mng_vlan(adapter);
1393 /* before we allocate an interrupt, we must be ready to handle it.
1394 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1395 * as soon as we call pci_request_irq, so we have to setup our
1396 * clean_rx handler before we do so. */
1397 e1000_configure(adapter);
1399 err = e1000_request_irq(adapter);
1403 /* From here on the code is the same as e1000_up() */
1404 clear_bit(__E1000_DOWN, &adapter->flags);
1406 napi_enable(&adapter->napi);
1408 e1000_irq_enable(adapter);
1410 netif_start_queue(netdev);
1412 /* fire a link status change interrupt to start the watchdog */
1413 ew32(ICS, E1000_ICS_LSC);
1415 return E1000_SUCCESS;
1418 e1000_power_down_phy(adapter);
1419 e1000_free_all_rx_resources(adapter);
1421 e1000_free_all_tx_resources(adapter);
1423 e1000_reset(adapter);
1429 * e1000_close - Disables a network interface
1430 * @netdev: network interface device structure
1432 * Returns 0, this is not allowed to fail
1434 * The close entry point is called when an interface is de-activated
1435 * by the OS. The hardware is still under the drivers control, but
1436 * needs to be disabled. A global MAC reset is issued to stop the
1437 * hardware, and all transmit and receive resources are freed.
1440 static int e1000_close(struct net_device *netdev)
1442 struct e1000_adapter *adapter = netdev_priv(netdev);
1443 struct e1000_hw *hw = &adapter->hw;
1445 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
1446 e1000_down(adapter);
1447 e1000_power_down_phy(adapter);
1448 e1000_free_irq(adapter);
1450 e1000_free_all_tx_resources(adapter);
1451 e1000_free_all_rx_resources(adapter);
1453 /* kill manageability vlan ID if supported, but not if a vlan with
1454 * the same ID is registered on the host OS (let 8021q kill it) */
1455 if ((hw->mng_cookie.status &
1456 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
1457 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) {
1458 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1465 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1466 * @adapter: address of board private structure
1467 * @start: address of beginning of memory
1468 * @len: length of memory
1470 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start,
1473 struct e1000_hw *hw = &adapter->hw;
1474 unsigned long begin = (unsigned long)start;
1475 unsigned long end = begin + len;
1477 /* First rev 82545 and 82546 need to not allow any memory
1478 * write location to cross 64k boundary due to errata 23 */
1479 if (hw->mac_type == e1000_82545 ||
1480 hw->mac_type == e1000_ce4100 ||
1481 hw->mac_type == e1000_82546) {
1482 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true;
1489 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1490 * @adapter: board private structure
1491 * @txdr: tx descriptor ring (for a specific queue) to setup
1493 * Return 0 on success, negative on failure
1496 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
1497 struct e1000_tx_ring *txdr)
1499 struct pci_dev *pdev = adapter->pdev;
1502 size = sizeof(struct e1000_buffer) * txdr->count;
1503 txdr->buffer_info = vzalloc(size);
1504 if (!txdr->buffer_info) {
1505 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1510 /* round up to nearest 4K */
1512 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1513 txdr->size = ALIGN(txdr->size, 4096);
1515 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
1519 vfree(txdr->buffer_info);
1520 e_err(probe, "Unable to allocate memory for the Tx descriptor "
1525 /* Fix for errata 23, can't cross 64kB boundary */
1526 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1527 void *olddesc = txdr->desc;
1528 dma_addr_t olddma = txdr->dma;
1529 e_err(tx_err, "txdr align check failed: %u bytes at %p\n",
1530 txdr->size, txdr->desc);
1531 /* Try again, without freeing the previous */
1532 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size,
1533 &txdr->dma, GFP_KERNEL);
1534 /* Failed allocation, critical failure */
1536 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1538 goto setup_tx_desc_die;
1541 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1543 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc,
1545 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1547 e_err(probe, "Unable to allocate aligned memory "
1548 "for the transmit descriptor ring\n");
1549 vfree(txdr->buffer_info);
1552 /* Free old allocation, new allocation was successful */
1553 dma_free_coherent(&pdev->dev, txdr->size, olddesc,
1557 memset(txdr->desc, 0, txdr->size);
1559 txdr->next_to_use = 0;
1560 txdr->next_to_clean = 0;
1566 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1567 * (Descriptors) for all queues
1568 * @adapter: board private structure
1570 * Return 0 on success, negative on failure
1573 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1577 for (i = 0; i < adapter->num_tx_queues; i++) {
1578 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1580 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
1581 for (i-- ; i >= 0; i--)
1582 e1000_free_tx_resources(adapter,
1583 &adapter->tx_ring[i]);
1592 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1593 * @adapter: board private structure
1595 * Configure the Tx unit of the MAC after a reset.
1598 static void e1000_configure_tx(struct e1000_adapter *adapter)
1601 struct e1000_hw *hw = &adapter->hw;
1602 u32 tdlen, tctl, tipg;
1605 /* Setup the HW Tx Head and Tail descriptor pointers */
1607 switch (adapter->num_tx_queues) {
1610 tdba = adapter->tx_ring[0].dma;
1611 tdlen = adapter->tx_ring[0].count *
1612 sizeof(struct e1000_tx_desc);
1614 ew32(TDBAH, (tdba >> 32));
1615 ew32(TDBAL, (tdba & 0x00000000ffffffffULL));
1618 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH);
1619 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT);
1623 /* Set the default values for the Tx Inter Packet Gap timer */
1624 if ((hw->media_type == e1000_media_type_fiber ||
1625 hw->media_type == e1000_media_type_internal_serdes))
1626 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1628 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1630 switch (hw->mac_type) {
1631 case e1000_82542_rev2_0:
1632 case e1000_82542_rev2_1:
1633 tipg = DEFAULT_82542_TIPG_IPGT;
1634 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1635 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1638 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1639 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1642 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1643 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1646 /* Set the Tx Interrupt Delay register */
1648 ew32(TIDV, adapter->tx_int_delay);
1649 if (hw->mac_type >= e1000_82540)
1650 ew32(TADV, adapter->tx_abs_int_delay);
1652 /* Program the Transmit Control Register */
1655 tctl &= ~E1000_TCTL_CT;
1656 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1657 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1659 e1000_config_collision_dist(hw);
1661 /* Setup Transmit Descriptor Settings for eop descriptor */
1662 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1664 /* only set IDE if we are delaying interrupts using the timers */
1665 if (adapter->tx_int_delay)
1666 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1668 if (hw->mac_type < e1000_82543)
1669 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1671 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1673 /* Cache if we're 82544 running in PCI-X because we'll
1674 * need this to apply a workaround later in the send path. */
1675 if (hw->mac_type == e1000_82544 &&
1676 hw->bus_type == e1000_bus_type_pcix)
1677 adapter->pcix_82544 = true;
1684 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1685 * @adapter: board private structure
1686 * @rxdr: rx descriptor ring (for a specific queue) to setup
1688 * Returns 0 on success, negative on failure
1691 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
1692 struct e1000_rx_ring *rxdr)
1694 struct pci_dev *pdev = adapter->pdev;
1697 size = sizeof(struct e1000_buffer) * rxdr->count;
1698 rxdr->buffer_info = vzalloc(size);
1699 if (!rxdr->buffer_info) {
1700 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1705 desc_len = sizeof(struct e1000_rx_desc);
1707 /* Round up to nearest 4K */
1709 rxdr->size = rxdr->count * desc_len;
1710 rxdr->size = ALIGN(rxdr->size, 4096);
1712 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
1716 e_err(probe, "Unable to allocate memory for the Rx descriptor "
1719 vfree(rxdr->buffer_info);
1723 /* Fix for errata 23, can't cross 64kB boundary */
1724 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1725 void *olddesc = rxdr->desc;
1726 dma_addr_t olddma = rxdr->dma;
1727 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n",
1728 rxdr->size, rxdr->desc);
1729 /* Try again, without freeing the previous */
1730 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size,
1731 &rxdr->dma, GFP_KERNEL);
1732 /* Failed allocation, critical failure */
1734 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1736 e_err(probe, "Unable to allocate memory for the Rx "
1737 "descriptor ring\n");
1738 goto setup_rx_desc_die;
1741 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1743 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc,
1745 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1747 e_err(probe, "Unable to allocate aligned memory for "
1748 "the Rx descriptor ring\n");
1749 goto setup_rx_desc_die;
1751 /* Free old allocation, new allocation was successful */
1752 dma_free_coherent(&pdev->dev, rxdr->size, olddesc,
1756 memset(rxdr->desc, 0, rxdr->size);
1758 rxdr->next_to_clean = 0;
1759 rxdr->next_to_use = 0;
1760 rxdr->rx_skb_top = NULL;
1766 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1767 * (Descriptors) for all queues
1768 * @adapter: board private structure
1770 * Return 0 on success, negative on failure
1773 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1777 for (i = 0; i < adapter->num_rx_queues; i++) {
1778 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1780 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
1781 for (i-- ; i >= 0; i--)
1782 e1000_free_rx_resources(adapter,
1783 &adapter->rx_ring[i]);
1792 * e1000_setup_rctl - configure the receive control registers
1793 * @adapter: Board private structure
1795 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1797 struct e1000_hw *hw = &adapter->hw;
1802 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1804 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO |
1805 E1000_RCTL_RDMTS_HALF |
1806 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT);
1808 if (hw->tbi_compatibility_on == 1)
1809 rctl |= E1000_RCTL_SBP;
1811 rctl &= ~E1000_RCTL_SBP;
1813 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1814 rctl &= ~E1000_RCTL_LPE;
1816 rctl |= E1000_RCTL_LPE;
1818 /* Setup buffer sizes */
1819 rctl &= ~E1000_RCTL_SZ_4096;
1820 rctl |= E1000_RCTL_BSEX;
1821 switch (adapter->rx_buffer_len) {
1822 case E1000_RXBUFFER_2048:
1824 rctl |= E1000_RCTL_SZ_2048;
1825 rctl &= ~E1000_RCTL_BSEX;
1827 case E1000_RXBUFFER_4096:
1828 rctl |= E1000_RCTL_SZ_4096;
1830 case E1000_RXBUFFER_8192:
1831 rctl |= E1000_RCTL_SZ_8192;
1833 case E1000_RXBUFFER_16384:
1834 rctl |= E1000_RCTL_SZ_16384;
1842 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1843 * @adapter: board private structure
1845 * Configure the Rx unit of the MAC after a reset.
1848 static void e1000_configure_rx(struct e1000_adapter *adapter)
1851 struct e1000_hw *hw = &adapter->hw;
1852 u32 rdlen, rctl, rxcsum;
1854 if (adapter->netdev->mtu > ETH_DATA_LEN) {
1855 rdlen = adapter->rx_ring[0].count *
1856 sizeof(struct e1000_rx_desc);
1857 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
1858 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
1860 rdlen = adapter->rx_ring[0].count *
1861 sizeof(struct e1000_rx_desc);
1862 adapter->clean_rx = e1000_clean_rx_irq;
1863 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1866 /* disable receives while setting up the descriptors */
1868 ew32(RCTL, rctl & ~E1000_RCTL_EN);
1870 /* set the Receive Delay Timer Register */
1871 ew32(RDTR, adapter->rx_int_delay);
1873 if (hw->mac_type >= e1000_82540) {
1874 ew32(RADV, adapter->rx_abs_int_delay);
1875 if (adapter->itr_setting != 0)
1876 ew32(ITR, 1000000000 / (adapter->itr * 256));
1879 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1880 * the Base and Length of the Rx Descriptor Ring */
1881 switch (adapter->num_rx_queues) {
1884 rdba = adapter->rx_ring[0].dma;
1886 ew32(RDBAH, (rdba >> 32));
1887 ew32(RDBAL, (rdba & 0x00000000ffffffffULL));
1890 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH);
1891 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT);
1895 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1896 if (hw->mac_type >= e1000_82543) {
1897 rxcsum = er32(RXCSUM);
1898 if (adapter->rx_csum)
1899 rxcsum |= E1000_RXCSUM_TUOFL;
1901 /* don't need to clear IPPCSE as it defaults to 0 */
1902 rxcsum &= ~E1000_RXCSUM_TUOFL;
1903 ew32(RXCSUM, rxcsum);
1906 /* Enable Receives */
1907 ew32(RCTL, rctl | E1000_RCTL_EN);
1911 * e1000_free_tx_resources - Free Tx Resources per Queue
1912 * @adapter: board private structure
1913 * @tx_ring: Tx descriptor ring for a specific queue
1915 * Free all transmit software resources
1918 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
1919 struct e1000_tx_ring *tx_ring)
1921 struct pci_dev *pdev = adapter->pdev;
1923 e1000_clean_tx_ring(adapter, tx_ring);
1925 vfree(tx_ring->buffer_info);
1926 tx_ring->buffer_info = NULL;
1928 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1931 tx_ring->desc = NULL;
1935 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1936 * @adapter: board private structure
1938 * Free all transmit software resources
1941 void e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1945 for (i = 0; i < adapter->num_tx_queues; i++)
1946 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1949 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1950 struct e1000_buffer *buffer_info)
1952 if (buffer_info->dma) {
1953 if (buffer_info->mapped_as_page)
1954 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1955 buffer_info->length, DMA_TO_DEVICE);
1957 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1958 buffer_info->length,
1960 buffer_info->dma = 0;
1962 if (buffer_info->skb) {
1963 dev_kfree_skb_any(buffer_info->skb);
1964 buffer_info->skb = NULL;
1966 buffer_info->time_stamp = 0;
1967 /* buffer_info must be completely set up in the transmit path */
1971 * e1000_clean_tx_ring - Free Tx Buffers
1972 * @adapter: board private structure
1973 * @tx_ring: ring to be cleaned
1976 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
1977 struct e1000_tx_ring *tx_ring)
1979 struct e1000_hw *hw = &adapter->hw;
1980 struct e1000_buffer *buffer_info;
1984 /* Free all the Tx ring sk_buffs */
1986 for (i = 0; i < tx_ring->count; i++) {
1987 buffer_info = &tx_ring->buffer_info[i];
1988 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1991 size = sizeof(struct e1000_buffer) * tx_ring->count;
1992 memset(tx_ring->buffer_info, 0, size);
1994 /* Zero out the descriptor ring */
1996 memset(tx_ring->desc, 0, tx_ring->size);
1998 tx_ring->next_to_use = 0;
1999 tx_ring->next_to_clean = 0;
2000 tx_ring->last_tx_tso = false;
2002 writel(0, hw->hw_addr + tx_ring->tdh);
2003 writel(0, hw->hw_addr + tx_ring->tdt);
2007 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2008 * @adapter: board private structure
2011 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
2015 for (i = 0; i < adapter->num_tx_queues; i++)
2016 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2020 * e1000_free_rx_resources - Free Rx Resources
2021 * @adapter: board private structure
2022 * @rx_ring: ring to clean the resources from
2024 * Free all receive software resources
2027 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
2028 struct e1000_rx_ring *rx_ring)
2030 struct pci_dev *pdev = adapter->pdev;
2032 e1000_clean_rx_ring(adapter, rx_ring);
2034 vfree(rx_ring->buffer_info);
2035 rx_ring->buffer_info = NULL;
2037 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2040 rx_ring->desc = NULL;
2044 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2045 * @adapter: board private structure
2047 * Free all receive software resources
2050 void e1000_free_all_rx_resources(struct e1000_adapter *adapter)
2054 for (i = 0; i < adapter->num_rx_queues; i++)
2055 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
2059 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2060 * @adapter: board private structure
2061 * @rx_ring: ring to free buffers from
2064 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
2065 struct e1000_rx_ring *rx_ring)
2067 struct e1000_hw *hw = &adapter->hw;
2068 struct e1000_buffer *buffer_info;
2069 struct pci_dev *pdev = adapter->pdev;
2073 /* Free all the Rx ring sk_buffs */
2074 for (i = 0; i < rx_ring->count; i++) {
2075 buffer_info = &rx_ring->buffer_info[i];
2076 if (buffer_info->dma &&
2077 adapter->clean_rx == e1000_clean_rx_irq) {
2078 dma_unmap_single(&pdev->dev, buffer_info->dma,
2079 buffer_info->length,
2081 } else if (buffer_info->dma &&
2082 adapter->clean_rx == e1000_clean_jumbo_rx_irq) {
2083 dma_unmap_page(&pdev->dev, buffer_info->dma,
2084 buffer_info->length,
2088 buffer_info->dma = 0;
2089 if (buffer_info->page) {
2090 put_page(buffer_info->page);
2091 buffer_info->page = NULL;
2093 if (buffer_info->skb) {
2094 dev_kfree_skb(buffer_info->skb);
2095 buffer_info->skb = NULL;
2099 /* there also may be some cached data from a chained receive */
2100 if (rx_ring->rx_skb_top) {
2101 dev_kfree_skb(rx_ring->rx_skb_top);
2102 rx_ring->rx_skb_top = NULL;
2105 size = sizeof(struct e1000_buffer) * rx_ring->count;
2106 memset(rx_ring->buffer_info, 0, size);
2108 /* Zero out the descriptor ring */
2109 memset(rx_ring->desc, 0, rx_ring->size);
2111 rx_ring->next_to_clean = 0;
2112 rx_ring->next_to_use = 0;
2114 writel(0, hw->hw_addr + rx_ring->rdh);
2115 writel(0, hw->hw_addr + rx_ring->rdt);
2119 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2120 * @adapter: board private structure
2123 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2127 for (i = 0; i < adapter->num_rx_queues; i++)
2128 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2131 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2132 * and memory write and invalidate disabled for certain operations
2134 static void e1000_enter_82542_rst(struct e1000_adapter *adapter)
2136 struct e1000_hw *hw = &adapter->hw;
2137 struct net_device *netdev = adapter->netdev;
2140 e1000_pci_clear_mwi(hw);
2143 rctl |= E1000_RCTL_RST;
2145 E1000_WRITE_FLUSH();
2148 if (netif_running(netdev))
2149 e1000_clean_all_rx_rings(adapter);
2152 static void e1000_leave_82542_rst(struct e1000_adapter *adapter)
2154 struct e1000_hw *hw = &adapter->hw;
2155 struct net_device *netdev = adapter->netdev;
2159 rctl &= ~E1000_RCTL_RST;
2161 E1000_WRITE_FLUSH();
2164 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE)
2165 e1000_pci_set_mwi(hw);
2167 if (netif_running(netdev)) {
2168 /* No need to loop, because 82542 supports only 1 queue */
2169 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2170 e1000_configure_rx(adapter);
2171 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2176 * e1000_set_mac - Change the Ethernet Address of the NIC
2177 * @netdev: network interface device structure
2178 * @p: pointer to an address structure
2180 * Returns 0 on success, negative on failure
2183 static int e1000_set_mac(struct net_device *netdev, void *p)
2185 struct e1000_adapter *adapter = netdev_priv(netdev);
2186 struct e1000_hw *hw = &adapter->hw;
2187 struct sockaddr *addr = p;
2189 if (!is_valid_ether_addr(addr->sa_data))
2190 return -EADDRNOTAVAIL;
2192 /* 82542 2.0 needs to be in reset to write receive address registers */
2194 if (hw->mac_type == e1000_82542_rev2_0)
2195 e1000_enter_82542_rst(adapter);
2197 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2198 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len);
2200 e1000_rar_set(hw, hw->mac_addr, 0);
2202 if (hw->mac_type == e1000_82542_rev2_0)
2203 e1000_leave_82542_rst(adapter);
2209 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2210 * @netdev: network interface device structure
2212 * The set_rx_mode entry point is called whenever the unicast or multicast
2213 * address lists or the network interface flags are updated. This routine is
2214 * responsible for configuring the hardware for proper unicast, multicast,
2215 * promiscuous mode, and all-multi behavior.
2218 static void e1000_set_rx_mode(struct net_device *netdev)
2220 struct e1000_adapter *adapter = netdev_priv(netdev);
2221 struct e1000_hw *hw = &adapter->hw;
2222 struct netdev_hw_addr *ha;
2223 bool use_uc = false;
2226 int i, rar_entries = E1000_RAR_ENTRIES;
2227 int mta_reg_count = E1000_NUM_MTA_REGISTERS;
2228 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC);
2231 e_err(probe, "memory allocation failed\n");
2235 /* Check for Promiscuous and All Multicast modes */
2239 if (netdev->flags & IFF_PROMISC) {
2240 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2241 rctl &= ~E1000_RCTL_VFE;
2243 if (netdev->flags & IFF_ALLMULTI)
2244 rctl |= E1000_RCTL_MPE;
2246 rctl &= ~E1000_RCTL_MPE;
2247 /* Enable VLAN filter if there is a VLAN */
2248 if (e1000_vlan_used(adapter))
2249 rctl |= E1000_RCTL_VFE;
2252 if (netdev_uc_count(netdev) > rar_entries - 1) {
2253 rctl |= E1000_RCTL_UPE;
2254 } else if (!(netdev->flags & IFF_PROMISC)) {
2255 rctl &= ~E1000_RCTL_UPE;
2261 /* 82542 2.0 needs to be in reset to write receive address registers */
2263 if (hw->mac_type == e1000_82542_rev2_0)
2264 e1000_enter_82542_rst(adapter);
2266 /* load the first 14 addresses into the exact filters 1-14. Unicast
2267 * addresses take precedence to avoid disabling unicast filtering
2270 * RAR 0 is used for the station MAC address
2271 * if there are not 14 addresses, go ahead and clear the filters
2275 netdev_for_each_uc_addr(ha, netdev) {
2276 if (i == rar_entries)
2278 e1000_rar_set(hw, ha->addr, i++);
2281 netdev_for_each_mc_addr(ha, netdev) {
2282 if (i == rar_entries) {
2283 /* load any remaining addresses into the hash table */
2284 u32 hash_reg, hash_bit, mta;
2285 hash_value = e1000_hash_mc_addr(hw, ha->addr);
2286 hash_reg = (hash_value >> 5) & 0x7F;
2287 hash_bit = hash_value & 0x1F;
2288 mta = (1 << hash_bit);
2289 mcarray[hash_reg] |= mta;
2291 e1000_rar_set(hw, ha->addr, i++);
2295 for (; i < rar_entries; i++) {
2296 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2297 E1000_WRITE_FLUSH();
2298 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2299 E1000_WRITE_FLUSH();
2302 /* write the hash table completely, write from bottom to avoid
2303 * both stupid write combining chipsets, and flushing each write */
2304 for (i = mta_reg_count - 1; i >= 0 ; i--) {
2306 * If we are on an 82544 has an errata where writing odd
2307 * offsets overwrites the previous even offset, but writing
2308 * backwards over the range solves the issue by always
2309 * writing the odd offset first
2311 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]);
2313 E1000_WRITE_FLUSH();
2315 if (hw->mac_type == e1000_82542_rev2_0)
2316 e1000_leave_82542_rst(adapter);
2322 * e1000_update_phy_info_task - get phy info
2323 * @work: work struct contained inside adapter struct
2325 * Need to wait a few seconds after link up to get diagnostic information from
2328 static void e1000_update_phy_info_task(struct work_struct *work)
2330 struct e1000_adapter *adapter = container_of(work,
2331 struct e1000_adapter,
2332 phy_info_task.work);
2333 if (test_bit(__E1000_DOWN, &adapter->flags))
2335 mutex_lock(&adapter->mutex);
2336 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2337 mutex_unlock(&adapter->mutex);
2341 * e1000_82547_tx_fifo_stall_task - task to complete work
2342 * @work: work struct contained inside adapter struct
2344 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work)
2346 struct e1000_adapter *adapter = container_of(work,
2347 struct e1000_adapter,
2348 fifo_stall_task.work);
2349 struct e1000_hw *hw = &adapter->hw;
2350 struct net_device *netdev = adapter->netdev;
2353 if (test_bit(__E1000_DOWN, &adapter->flags))
2355 mutex_lock(&adapter->mutex);
2356 if (atomic_read(&adapter->tx_fifo_stall)) {
2357 if ((er32(TDT) == er32(TDH)) &&
2358 (er32(TDFT) == er32(TDFH)) &&
2359 (er32(TDFTS) == er32(TDFHS))) {
2361 ew32(TCTL, tctl & ~E1000_TCTL_EN);
2362 ew32(TDFT, adapter->tx_head_addr);
2363 ew32(TDFH, adapter->tx_head_addr);
2364 ew32(TDFTS, adapter->tx_head_addr);
2365 ew32(TDFHS, adapter->tx_head_addr);
2367 E1000_WRITE_FLUSH();
2369 adapter->tx_fifo_head = 0;
2370 atomic_set(&adapter->tx_fifo_stall, 0);
2371 netif_wake_queue(netdev);
2372 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) {
2373 schedule_delayed_work(&adapter->fifo_stall_task, 1);
2376 mutex_unlock(&adapter->mutex);
2379 bool e1000_has_link(struct e1000_adapter *adapter)
2381 struct e1000_hw *hw = &adapter->hw;
2382 bool link_active = false;
2384 /* get_link_status is set on LSC (link status) interrupt or rx
2385 * sequence error interrupt (except on intel ce4100).
2386 * get_link_status will stay false until the
2387 * e1000_check_for_link establishes link for copper adapters
2390 switch (hw->media_type) {
2391 case e1000_media_type_copper:
2392 if (hw->mac_type == e1000_ce4100)
2393 hw->get_link_status = 1;
2394 if (hw->get_link_status) {
2395 e1000_check_for_link(hw);
2396 link_active = !hw->get_link_status;
2401 case e1000_media_type_fiber:
2402 e1000_check_for_link(hw);
2403 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
2405 case e1000_media_type_internal_serdes:
2406 e1000_check_for_link(hw);
2407 link_active = hw->serdes_has_link;
2417 * e1000_watchdog - work function
2418 * @work: work struct contained inside adapter struct
2420 static void e1000_watchdog(struct work_struct *work)
2422 struct e1000_adapter *adapter = container_of(work,
2423 struct e1000_adapter,
2424 watchdog_task.work);
2425 struct e1000_hw *hw = &adapter->hw;
2426 struct net_device *netdev = adapter->netdev;
2427 struct e1000_tx_ring *txdr = adapter->tx_ring;
2430 if (test_bit(__E1000_DOWN, &adapter->flags))
2433 mutex_lock(&adapter->mutex);
2434 link = e1000_has_link(adapter);
2435 if ((netif_carrier_ok(netdev)) && link)
2439 if (!netif_carrier_ok(netdev)) {
2442 /* update snapshot of PHY registers on LSC */
2443 e1000_get_speed_and_duplex(hw,
2444 &adapter->link_speed,
2445 &adapter->link_duplex);
2448 pr_info("%s NIC Link is Up %d Mbps %s, "
2449 "Flow Control: %s\n",
2451 adapter->link_speed,
2452 adapter->link_duplex == FULL_DUPLEX ?
2453 "Full Duplex" : "Half Duplex",
2454 ((ctrl & E1000_CTRL_TFCE) && (ctrl &
2455 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl &
2456 E1000_CTRL_RFCE) ? "RX" : ((ctrl &
2457 E1000_CTRL_TFCE) ? "TX" : "None")));
2459 /* adjust timeout factor according to speed/duplex */
2460 adapter->tx_timeout_factor = 1;
2461 switch (adapter->link_speed) {
2464 adapter->tx_timeout_factor = 16;
2468 /* maybe add some timeout factor ? */
2472 /* enable transmits in the hardware */
2474 tctl |= E1000_TCTL_EN;
2477 netif_carrier_on(netdev);
2478 if (!test_bit(__E1000_DOWN, &adapter->flags))
2479 schedule_delayed_work(&adapter->phy_info_task,
2481 adapter->smartspeed = 0;
2484 if (netif_carrier_ok(netdev)) {
2485 adapter->link_speed = 0;
2486 adapter->link_duplex = 0;
2487 pr_info("%s NIC Link is Down\n",
2489 netif_carrier_off(netdev);
2491 if (!test_bit(__E1000_DOWN, &adapter->flags))
2492 schedule_delayed_work(&adapter->phy_info_task,
2496 e1000_smartspeed(adapter);
2500 e1000_update_stats(adapter);
2502 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2503 adapter->tpt_old = adapter->stats.tpt;
2504 hw->collision_delta = adapter->stats.colc - adapter->colc_old;
2505 adapter->colc_old = adapter->stats.colc;
2507 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2508 adapter->gorcl_old = adapter->stats.gorcl;
2509 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2510 adapter->gotcl_old = adapter->stats.gotcl;
2512 e1000_update_adaptive(hw);
2514 if (!netif_carrier_ok(netdev)) {
2515 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2516 /* We've lost link, so the controller stops DMA,
2517 * but we've got queued Tx work that's never going
2518 * to get done, so reset controller to flush Tx.
2519 * (Do the reset outside of interrupt context). */
2520 adapter->tx_timeout_count++;
2521 schedule_work(&adapter->reset_task);
2522 /* exit immediately since reset is imminent */
2527 /* Simple mode for Interrupt Throttle Rate (ITR) */
2528 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) {
2530 * Symmetric Tx/Rx gets a reduced ITR=2000;
2531 * Total asymmetrical Tx or Rx gets ITR=8000;
2532 * everyone else is between 2000-8000.
2534 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000;
2535 u32 dif = (adapter->gotcl > adapter->gorcl ?
2536 adapter->gotcl - adapter->gorcl :
2537 adapter->gorcl - adapter->gotcl) / 10000;
2538 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2540 ew32(ITR, 1000000000 / (itr * 256));
2543 /* Cause software interrupt to ensure rx ring is cleaned */
2544 ew32(ICS, E1000_ICS_RXDMT0);
2546 /* Force detection of hung controller every watchdog period */
2547 adapter->detect_tx_hung = true;
2549 /* Reschedule the task */
2550 if (!test_bit(__E1000_DOWN, &adapter->flags))
2551 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ);
2554 mutex_unlock(&adapter->mutex);
2557 enum latency_range {
2561 latency_invalid = 255
2565 * e1000_update_itr - update the dynamic ITR value based on statistics
2566 * @adapter: pointer to adapter
2567 * @itr_setting: current adapter->itr
2568 * @packets: the number of packets during this measurement interval
2569 * @bytes: the number of bytes during this measurement interval
2571 * Stores a new ITR value based on packets and byte
2572 * counts during the last interrupt. The advantage of per interrupt
2573 * computation is faster updates and more accurate ITR for the current
2574 * traffic pattern. Constants in this function were computed
2575 * based on theoretical maximum wire speed and thresholds were set based
2576 * on testing data as well as attempting to minimize response time
2577 * while increasing bulk throughput.
2578 * this functionality is controlled by the InterruptThrottleRate module
2579 * parameter (see e1000_param.c)
2581 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2582 u16 itr_setting, int packets, int bytes)
2584 unsigned int retval = itr_setting;
2585 struct e1000_hw *hw = &adapter->hw;
2587 if (unlikely(hw->mac_type < e1000_82540))
2588 goto update_itr_done;
2591 goto update_itr_done;
2593 switch (itr_setting) {
2594 case lowest_latency:
2595 /* jumbo frames get bulk treatment*/
2596 if (bytes/packets > 8000)
2597 retval = bulk_latency;
2598 else if ((packets < 5) && (bytes > 512))
2599 retval = low_latency;
2601 case low_latency: /* 50 usec aka 20000 ints/s */
2602 if (bytes > 10000) {
2603 /* jumbo frames need bulk latency setting */
2604 if (bytes/packets > 8000)
2605 retval = bulk_latency;
2606 else if ((packets < 10) || ((bytes/packets) > 1200))
2607 retval = bulk_latency;
2608 else if ((packets > 35))
2609 retval = lowest_latency;
2610 } else if (bytes/packets > 2000)
2611 retval = bulk_latency;
2612 else if (packets <= 2 && bytes < 512)
2613 retval = lowest_latency;
2615 case bulk_latency: /* 250 usec aka 4000 ints/s */
2616 if (bytes > 25000) {
2618 retval = low_latency;
2619 } else if (bytes < 6000) {
2620 retval = low_latency;
2629 static void e1000_set_itr(struct e1000_adapter *adapter)
2631 struct e1000_hw *hw = &adapter->hw;
2633 u32 new_itr = adapter->itr;
2635 if (unlikely(hw->mac_type < e1000_82540))
2638 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2639 if (unlikely(adapter->link_speed != SPEED_1000)) {
2645 adapter->tx_itr = e1000_update_itr(adapter,
2647 adapter->total_tx_packets,
2648 adapter->total_tx_bytes);
2649 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2650 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2651 adapter->tx_itr = low_latency;
2653 adapter->rx_itr = e1000_update_itr(adapter,
2655 adapter->total_rx_packets,
2656 adapter->total_rx_bytes);
2657 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2658 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2659 adapter->rx_itr = low_latency;
2661 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2663 switch (current_itr) {
2664 /* counts and packets in update_itr are dependent on these numbers */
2665 case lowest_latency:
2669 new_itr = 20000; /* aka hwitr = ~200 */
2679 if (new_itr != adapter->itr) {
2680 /* this attempts to bias the interrupt rate towards Bulk
2681 * by adding intermediate steps when interrupt rate is
2683 new_itr = new_itr > adapter->itr ?
2684 min(adapter->itr + (new_itr >> 2), new_itr) :
2686 adapter->itr = new_itr;
2687 ew32(ITR, 1000000000 / (new_itr * 256));
2691 #define E1000_TX_FLAGS_CSUM 0x00000001
2692 #define E1000_TX_FLAGS_VLAN 0x00000002
2693 #define E1000_TX_FLAGS_TSO 0x00000004
2694 #define E1000_TX_FLAGS_IPV4 0x00000008
2695 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2696 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2698 static int e1000_tso(struct e1000_adapter *adapter,
2699 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2701 struct e1000_context_desc *context_desc;
2702 struct e1000_buffer *buffer_info;
2705 u16 ipcse = 0, tucse, mss;
2706 u8 ipcss, ipcso, tucss, tucso, hdr_len;
2709 if (skb_is_gso(skb)) {
2710 if (skb_header_cloned(skb)) {
2711 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2716 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2717 mss = skb_shinfo(skb)->gso_size;
2718 if (skb->protocol == htons(ETH_P_IP)) {
2719 struct iphdr *iph = ip_hdr(skb);
2722 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2726 cmd_length = E1000_TXD_CMD_IP;
2727 ipcse = skb_transport_offset(skb) - 1;
2728 } else if (skb->protocol == htons(ETH_P_IPV6)) {
2729 ipv6_hdr(skb)->payload_len = 0;
2730 tcp_hdr(skb)->check =
2731 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2732 &ipv6_hdr(skb)->daddr,
2736 ipcss = skb_network_offset(skb);
2737 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2738 tucss = skb_transport_offset(skb);
2739 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2742 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2743 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2745 i = tx_ring->next_to_use;
2746 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2747 buffer_info = &tx_ring->buffer_info[i];
2749 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2750 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2751 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2752 context_desc->upper_setup.tcp_fields.tucss = tucss;
2753 context_desc->upper_setup.tcp_fields.tucso = tucso;
2754 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2755 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2756 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2757 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2759 buffer_info->time_stamp = jiffies;
2760 buffer_info->next_to_watch = i;
2762 if (++i == tx_ring->count) i = 0;
2763 tx_ring->next_to_use = i;
2770 static bool e1000_tx_csum(struct e1000_adapter *adapter,
2771 struct e1000_tx_ring *tx_ring, struct sk_buff *skb)
2773 struct e1000_context_desc *context_desc;
2774 struct e1000_buffer *buffer_info;
2777 u32 cmd_len = E1000_TXD_CMD_DEXT;
2779 if (skb->ip_summed != CHECKSUM_PARTIAL)
2782 switch (skb->protocol) {
2783 case cpu_to_be16(ETH_P_IP):
2784 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2785 cmd_len |= E1000_TXD_CMD_TCP;
2787 case cpu_to_be16(ETH_P_IPV6):
2788 /* XXX not handling all IPV6 headers */
2789 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2790 cmd_len |= E1000_TXD_CMD_TCP;
2793 if (unlikely(net_ratelimit()))
2794 e_warn(drv, "checksum_partial proto=%x!\n",
2799 css = skb_checksum_start_offset(skb);
2801 i = tx_ring->next_to_use;
2802 buffer_info = &tx_ring->buffer_info[i];
2803 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2805 context_desc->lower_setup.ip_config = 0;
2806 context_desc->upper_setup.tcp_fields.tucss = css;
2807 context_desc->upper_setup.tcp_fields.tucso =
2808 css + skb->csum_offset;
2809 context_desc->upper_setup.tcp_fields.tucse = 0;
2810 context_desc->tcp_seg_setup.data = 0;
2811 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
2813 buffer_info->time_stamp = jiffies;
2814 buffer_info->next_to_watch = i;
2816 if (unlikely(++i == tx_ring->count)) i = 0;
2817 tx_ring->next_to_use = i;
2822 #define E1000_MAX_TXD_PWR 12
2823 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2825 static int e1000_tx_map(struct e1000_adapter *adapter,
2826 struct e1000_tx_ring *tx_ring,
2827 struct sk_buff *skb, unsigned int first,
2828 unsigned int max_per_txd, unsigned int nr_frags,
2831 struct e1000_hw *hw = &adapter->hw;
2832 struct pci_dev *pdev = adapter->pdev;
2833 struct e1000_buffer *buffer_info;
2834 unsigned int len = skb_headlen(skb);
2835 unsigned int offset = 0, size, count = 0, i;
2836 unsigned int f, bytecount, segs;
2838 i = tx_ring->next_to_use;
2841 buffer_info = &tx_ring->buffer_info[i];
2842 size = min(len, max_per_txd);
2843 /* Workaround for Controller erratum --
2844 * descriptor for non-tso packet in a linear SKB that follows a
2845 * tso gets written back prematurely before the data is fully
2846 * DMA'd to the controller */
2847 if (!skb->data_len && tx_ring->last_tx_tso &&
2849 tx_ring->last_tx_tso = false;
2853 /* Workaround for premature desc write-backs
2854 * in TSO mode. Append 4-byte sentinel desc */
2855 if (unlikely(mss && !nr_frags && size == len && size > 8))
2857 /* work-around for errata 10 and it applies
2858 * to all controllers in PCI-X mode
2859 * The fix is to make sure that the first descriptor of a
2860 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2862 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
2863 (size > 2015) && count == 0))
2866 /* Workaround for potential 82544 hang in PCI-X. Avoid
2867 * terminating buffers within evenly-aligned dwords. */
2868 if (unlikely(adapter->pcix_82544 &&
2869 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2873 buffer_info->length = size;
2874 /* set time_stamp *before* dma to help avoid a possible race */
2875 buffer_info->time_stamp = jiffies;
2876 buffer_info->mapped_as_page = false;
2877 buffer_info->dma = dma_map_single(&pdev->dev,
2879 size, DMA_TO_DEVICE);
2880 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2882 buffer_info->next_to_watch = i;
2889 if (unlikely(i == tx_ring->count))
2894 for (f = 0; f < nr_frags; f++) {
2895 const struct skb_frag_struct *frag;
2897 frag = &skb_shinfo(skb)->frags[f];
2898 len = skb_frag_size(frag);
2902 unsigned long bufend;
2904 if (unlikely(i == tx_ring->count))
2907 buffer_info = &tx_ring->buffer_info[i];
2908 size = min(len, max_per_txd);
2909 /* Workaround for premature desc write-backs
2910 * in TSO mode. Append 4-byte sentinel desc */
2911 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2913 /* Workaround for potential 82544 hang in PCI-X.
2914 * Avoid terminating buffers within evenly-aligned
2916 bufend = (unsigned long)
2917 page_to_phys(skb_frag_page(frag));
2918 bufend += offset + size - 1;
2919 if (unlikely(adapter->pcix_82544 &&
2924 buffer_info->length = size;
2925 buffer_info->time_stamp = jiffies;
2926 buffer_info->mapped_as_page = true;
2927 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
2928 offset, size, DMA_TO_DEVICE);
2929 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2931 buffer_info->next_to_watch = i;
2939 segs = skb_shinfo(skb)->gso_segs ?: 1;
2940 /* multiply data chunks by size of headers */
2941 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
2943 tx_ring->buffer_info[i].skb = skb;
2944 tx_ring->buffer_info[i].segs = segs;
2945 tx_ring->buffer_info[i].bytecount = bytecount;
2946 tx_ring->buffer_info[first].next_to_watch = i;
2951 dev_err(&pdev->dev, "TX DMA map failed\n");
2952 buffer_info->dma = 0;
2958 i += tx_ring->count;
2960 buffer_info = &tx_ring->buffer_info[i];
2961 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
2967 static void e1000_tx_queue(struct e1000_adapter *adapter,
2968 struct e1000_tx_ring *tx_ring, int tx_flags,
2971 struct e1000_hw *hw = &adapter->hw;
2972 struct e1000_tx_desc *tx_desc = NULL;
2973 struct e1000_buffer *buffer_info;
2974 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2977 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2978 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2980 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2982 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2983 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2986 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2987 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2988 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2991 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2992 txd_lower |= E1000_TXD_CMD_VLE;
2993 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2996 i = tx_ring->next_to_use;
2999 buffer_info = &tx_ring->buffer_info[i];
3000 tx_desc = E1000_TX_DESC(*tx_ring, i);
3001 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3002 tx_desc->lower.data =
3003 cpu_to_le32(txd_lower | buffer_info->length);
3004 tx_desc->upper.data = cpu_to_le32(txd_upper);
3005 if (unlikely(++i == tx_ring->count)) i = 0;
3008 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3010 /* Force memory writes to complete before letting h/w
3011 * know there are new descriptors to fetch. (Only
3012 * applicable for weak-ordered memory model archs,
3013 * such as IA-64). */
3016 tx_ring->next_to_use = i;
3017 writel(i, hw->hw_addr + tx_ring->tdt);
3018 /* we need this if more than one processor can write to our tail
3019 * at a time, it syncronizes IO on IA64/Altix systems */
3024 * 82547 workaround to avoid controller hang in half-duplex environment.
3025 * The workaround is to avoid queuing a large packet that would span
3026 * the internal Tx FIFO ring boundary by notifying the stack to resend
3027 * the packet at a later time. This gives the Tx FIFO an opportunity to
3028 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3029 * to the beginning of the Tx FIFO.
3032 #define E1000_FIFO_HDR 0x10
3033 #define E1000_82547_PAD_LEN 0x3E0
3035 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
3036 struct sk_buff *skb)
3038 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
3039 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR;
3041 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR);
3043 if (adapter->link_duplex != HALF_DUPLEX)
3044 goto no_fifo_stall_required;
3046 if (atomic_read(&adapter->tx_fifo_stall))
3049 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
3050 atomic_set(&adapter->tx_fifo_stall, 1);
3054 no_fifo_stall_required:
3055 adapter->tx_fifo_head += skb_fifo_len;
3056 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
3057 adapter->tx_fifo_head -= adapter->tx_fifo_size;
3061 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3063 struct e1000_adapter *adapter = netdev_priv(netdev);
3064 struct e1000_tx_ring *tx_ring = adapter->tx_ring;
3066 netif_stop_queue(netdev);
3067 /* Herbert's original patch had:
3068 * smp_mb__after_netif_stop_queue();
3069 * but since that doesn't exist yet, just open code it. */
3072 /* We need to check again in a case another CPU has just
3073 * made room available. */
3074 if (likely(E1000_DESC_UNUSED(tx_ring) < size))
3078 netif_start_queue(netdev);
3079 ++adapter->restart_queue;
3083 static int e1000_maybe_stop_tx(struct net_device *netdev,
3084 struct e1000_tx_ring *tx_ring, int size)
3086 if (likely(E1000_DESC_UNUSED(tx_ring) >= size))
3088 return __e1000_maybe_stop_tx(netdev, size);
3091 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3092 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
3093 struct net_device *netdev)
3095 struct e1000_adapter *adapter = netdev_priv(netdev);
3096 struct e1000_hw *hw = &adapter->hw;
3097 struct e1000_tx_ring *tx_ring;
3098 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
3099 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3100 unsigned int tx_flags = 0;
3101 unsigned int len = skb_headlen(skb);
3102 unsigned int nr_frags;
3108 /* This goes back to the question of how to logically map a tx queue
3109 * to a flow. Right now, performance is impacted slightly negatively
3110 * if using multiple tx queues. If the stack breaks away from a
3111 * single qdisc implementation, we can look at this again. */
3112 tx_ring = adapter->tx_ring;
3114 if (unlikely(skb->len <= 0)) {
3115 dev_kfree_skb_any(skb);
3116 return NETDEV_TX_OK;
3119 mss = skb_shinfo(skb)->gso_size;
3120 /* The controller does a simple calculation to
3121 * make sure there is enough room in the FIFO before
3122 * initiating the DMA for each buffer. The calc is:
3123 * 4 = ceil(buffer len/mss). To make sure we don't
3124 * overrun the FIFO, adjust the max buffer len if mss
3128 max_per_txd = min(mss << 2, max_per_txd);
3129 max_txd_pwr = fls(max_per_txd) - 1;
3131 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3132 if (skb->data_len && hdr_len == len) {
3133 switch (hw->mac_type) {
3134 unsigned int pull_size;
3136 /* Make sure we have room to chop off 4 bytes,
3137 * and that the end alignment will work out to
3138 * this hardware's requirements
3139 * NOTE: this is a TSO only workaround
3140 * if end byte alignment not correct move us
3141 * into the next dword */
3142 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4)
3145 pull_size = min((unsigned int)4, skb->data_len);
3146 if (!__pskb_pull_tail(skb, pull_size)) {
3147 e_err(drv, "__pskb_pull_tail "
3149 dev_kfree_skb_any(skb);
3150 return NETDEV_TX_OK;
3152 len = skb_headlen(skb);
3161 /* reserve a descriptor for the offload context */
3162 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3166 /* Controller Erratum workaround */
3167 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb))
3170 count += TXD_USE_COUNT(len, max_txd_pwr);
3172 if (adapter->pcix_82544)
3175 /* work-around for errata 10 and it applies to all controllers
3176 * in PCI-X mode, so add one more descriptor to the count
3178 if (unlikely((hw->bus_type == e1000_bus_type_pcix) &&
3182 nr_frags = skb_shinfo(skb)->nr_frags;
3183 for (f = 0; f < nr_frags; f++)
3184 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
3186 if (adapter->pcix_82544)
3189 /* need: count + 2 desc gap to keep tail from touching
3190 * head, otherwise try next time */
3191 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2)))
3192 return NETDEV_TX_BUSY;
3194 if (unlikely((hw->mac_type == e1000_82547) &&
3195 (e1000_82547_fifo_workaround(adapter, skb)))) {
3196 netif_stop_queue(netdev);
3197 if (!test_bit(__E1000_DOWN, &adapter->flags))
3198 schedule_delayed_work(&adapter->fifo_stall_task, 1);
3199 return NETDEV_TX_BUSY;
3202 if (vlan_tx_tag_present(skb)) {
3203 tx_flags |= E1000_TX_FLAGS_VLAN;
3204 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3207 first = tx_ring->next_to_use;
3209 tso = e1000_tso(adapter, tx_ring, skb);
3211 dev_kfree_skb_any(skb);
3212 return NETDEV_TX_OK;
3216 if (likely(hw->mac_type != e1000_82544))
3217 tx_ring->last_tx_tso = true;
3218 tx_flags |= E1000_TX_FLAGS_TSO;
3219 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
3220 tx_flags |= E1000_TX_FLAGS_CSUM;
3222 if (likely(skb->protocol == htons(ETH_P_IP)))
3223 tx_flags |= E1000_TX_FLAGS_IPV4;
3225 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd,
3229 e1000_tx_queue(adapter, tx_ring, tx_flags, count);
3230 /* Make sure there is space in the ring for the next send. */
3231 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2);
3234 dev_kfree_skb_any(skb);
3235 tx_ring->buffer_info[first].time_stamp = 0;
3236 tx_ring->next_to_use = first;
3239 return NETDEV_TX_OK;
3243 * e1000_tx_timeout - Respond to a Tx Hang
3244 * @netdev: network interface device structure
3247 static void e1000_tx_timeout(struct net_device *netdev)
3249 struct e1000_adapter *adapter = netdev_priv(netdev);
3251 /* Do the reset outside of interrupt context */
3252 adapter->tx_timeout_count++;
3253 schedule_work(&adapter->reset_task);
3256 static void e1000_reset_task(struct work_struct *work)
3258 struct e1000_adapter *adapter =
3259 container_of(work, struct e1000_adapter, reset_task);
3261 if (test_bit(__E1000_DOWN, &adapter->flags))
3263 e1000_reinit_safe(adapter);
3267 * e1000_get_stats - Get System Network Statistics
3268 * @netdev: network interface device structure
3270 * Returns the address of the device statistics structure.
3271 * The statistics are actually updated from the watchdog.
3274 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3276 /* only return the current stats */
3277 return &netdev->stats;
3281 * e1000_change_mtu - Change the Maximum Transfer Unit
3282 * @netdev: network interface device structure
3283 * @new_mtu: new value for maximum frame size
3285 * Returns 0 on success, negative on failure
3288 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3290 struct e1000_adapter *adapter = netdev_priv(netdev);
3291 struct e1000_hw *hw = &adapter->hw;
3292 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3294 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3295 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3296 e_err(probe, "Invalid MTU setting\n");
3300 /* Adapter-specific max frame size limits. */
3301 switch (hw->mac_type) {
3302 case e1000_undefined ... e1000_82542_rev2_1:
3303 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) {
3304 e_err(probe, "Jumbo Frames not supported.\n");
3309 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3313 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
3315 /* e1000_down has a dependency on max_frame_size */
3316 hw->max_frame_size = max_frame;
3317 if (netif_running(netdev))
3318 e1000_down(adapter);
3320 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3321 * means we reserve 2 more, this pushes us to allocate from the next
3323 * i.e. RXBUFFER_2048 --> size-4096 slab
3324 * however with the new *_jumbo_rx* routines, jumbo receives will use
3325 * fragmented skbs */
3327 if (max_frame <= E1000_RXBUFFER_2048)
3328 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3330 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3331 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3332 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3333 adapter->rx_buffer_len = PAGE_SIZE;
3336 /* adjust allocation if LPE protects us, and we aren't using SBP */
3337 if (!hw->tbi_compatibility_on &&
3338 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) ||
3339 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
3340 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3342 pr_info("%s changing MTU from %d to %d\n",
3343 netdev->name, netdev->mtu, new_mtu);
3344 netdev->mtu = new_mtu;
3346 if (netif_running(netdev))
3349 e1000_reset(adapter);
3351 clear_bit(__E1000_RESETTING, &adapter->flags);
3357 * e1000_update_stats - Update the board statistics counters
3358 * @adapter: board private structure
3361 void e1000_update_stats(struct e1000_adapter *adapter)
3363 struct net_device *netdev = adapter->netdev;
3364 struct e1000_hw *hw = &adapter->hw;
3365 struct pci_dev *pdev = adapter->pdev;
3366 unsigned long flags;
3369 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3372 * Prevent stats update while adapter is being reset, or if the pci
3373 * connection is down.
3375 if (adapter->link_speed == 0)
3377 if (pci_channel_offline(pdev))
3380 spin_lock_irqsave(&adapter->stats_lock, flags);
3382 /* these counters are modified from e1000_tbi_adjust_stats,
3383 * called from the interrupt context, so they must only
3384 * be written while holding adapter->stats_lock
3387 adapter->stats.crcerrs += er32(CRCERRS);
3388 adapter->stats.gprc += er32(GPRC);
3389 adapter->stats.gorcl += er32(GORCL);
3390 adapter->stats.gorch += er32(GORCH);
3391 adapter->stats.bprc += er32(BPRC);
3392 adapter->stats.mprc += er32(MPRC);
3393 adapter->stats.roc += er32(ROC);
3395 adapter->stats.prc64 += er32(PRC64);
3396 adapter->stats.prc127 += er32(PRC127);
3397 adapter->stats.prc255 += er32(PRC255);
3398 adapter->stats.prc511 += er32(PRC511);
3399 adapter->stats.prc1023 += er32(PRC1023);
3400 adapter->stats.prc1522 += er32(PRC1522);
3402 adapter->stats.symerrs += er32(SYMERRS);
3403 adapter->stats.mpc += er32(MPC);
3404 adapter->stats.scc += er32(SCC);
3405 adapter->stats.ecol += er32(ECOL);
3406 adapter->stats.mcc += er32(MCC);
3407 adapter->stats.latecol += er32(LATECOL);
3408 adapter->stats.dc += er32(DC);
3409 adapter->stats.sec += er32(SEC);
3410 adapter->stats.rlec += er32(RLEC);
3411 adapter->stats.xonrxc += er32(XONRXC);
3412 adapter->stats.xontxc += er32(XONTXC);
3413 adapter->stats.xoffrxc += er32(XOFFRXC);
3414 adapter->stats.xofftxc += er32(XOFFTXC);
3415 adapter->stats.fcruc += er32(FCRUC);
3416 adapter->stats.gptc += er32(GPTC);
3417 adapter->stats.gotcl += er32(GOTCL);
3418 adapter->stats.gotch += er32(GOTCH);
3419 adapter->stats.rnbc += er32(RNBC);
3420 adapter->stats.ruc += er32(RUC);
3421 adapter->stats.rfc += er32(RFC);
3422 adapter->stats.rjc += er32(RJC);
3423 adapter->stats.torl += er32(TORL);
3424 adapter->stats.torh += er32(TORH);
3425 adapter->stats.totl += er32(TOTL);
3426 adapter->stats.toth += er32(TOTH);
3427 adapter->stats.tpr += er32(TPR);
3429 adapter->stats.ptc64 += er32(PTC64);
3430 adapter->stats.ptc127 += er32(PTC127);
3431 adapter->stats.ptc255 += er32(PTC255);
3432 adapter->stats.ptc511 += er32(PTC511);
3433 adapter->stats.ptc1023 += er32(PTC1023);
3434 adapter->stats.ptc1522 += er32(PTC1522);
3436 adapter->stats.mptc += er32(MPTC);
3437 adapter->stats.bptc += er32(BPTC);
3439 /* used for adaptive IFS */
3441 hw->tx_packet_delta = er32(TPT);
3442 adapter->stats.tpt += hw->tx_packet_delta;
3443 hw->collision_delta = er32(COLC);
3444 adapter->stats.colc += hw->collision_delta;
3446 if (hw->mac_type >= e1000_82543) {
3447 adapter->stats.algnerrc += er32(ALGNERRC);
3448 adapter->stats.rxerrc += er32(RXERRC);
3449 adapter->stats.tncrs += er32(TNCRS);
3450 adapter->stats.cexterr += er32(CEXTERR);
3451 adapter->stats.tsctc += er32(TSCTC);
3452 adapter->stats.tsctfc += er32(TSCTFC);
3455 /* Fill out the OS statistics structure */
3456 netdev->stats.multicast = adapter->stats.mprc;
3457 netdev->stats.collisions = adapter->stats.colc;
3461 /* RLEC on some newer hardware can be incorrect so build
3462 * our own version based on RUC and ROC */
3463 netdev->stats.rx_errors = adapter->stats.rxerrc +
3464 adapter->stats.crcerrs + adapter->stats.algnerrc +
3465 adapter->stats.ruc + adapter->stats.roc +
3466 adapter->stats.cexterr;
3467 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc;
3468 netdev->stats.rx_length_errors = adapter->stats.rlerrc;
3469 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3470 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3471 netdev->stats.rx_missed_errors = adapter->stats.mpc;
3474 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol;
3475 netdev->stats.tx_errors = adapter->stats.txerrc;
3476 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3477 netdev->stats.tx_window_errors = adapter->stats.latecol;
3478 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3479 if (hw->bad_tx_carr_stats_fd &&
3480 adapter->link_duplex == FULL_DUPLEX) {
3481 netdev->stats.tx_carrier_errors = 0;
3482 adapter->stats.tncrs = 0;
3485 /* Tx Dropped needs to be maintained elsewhere */
3488 if (hw->media_type == e1000_media_type_copper) {
3489 if ((adapter->link_speed == SPEED_1000) &&
3490 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3491 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3492 adapter->phy_stats.idle_errors += phy_tmp;
3495 if ((hw->mac_type <= e1000_82546) &&
3496 (hw->phy_type == e1000_phy_m88) &&
3497 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3498 adapter->phy_stats.receive_errors += phy_tmp;
3501 /* Management Stats */
3502 if (hw->has_smbus) {
3503 adapter->stats.mgptc += er32(MGTPTC);
3504 adapter->stats.mgprc += er32(MGTPRC);
3505 adapter->stats.mgpdc += er32(MGTPDC);
3508 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3512 * e1000_intr - Interrupt Handler
3513 * @irq: interrupt number
3514 * @data: pointer to a network interface device structure
3517 static irqreturn_t e1000_intr(int irq, void *data)
3519 struct net_device *netdev = data;
3520 struct e1000_adapter *adapter = netdev_priv(netdev);
3521 struct e1000_hw *hw = &adapter->hw;
3522 u32 icr = er32(ICR);
3524 if (unlikely((!icr)))
3525 return IRQ_NONE; /* Not our interrupt */
3528 * we might have caused the interrupt, but the above
3529 * read cleared it, and just in case the driver is
3530 * down there is nothing to do so return handled
3532 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags)))
3535 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3536 hw->get_link_status = 1;
3537 /* guard against interrupt when we're going down */
3538 if (!test_bit(__E1000_DOWN, &adapter->flags))
3539 schedule_delayed_work(&adapter->watchdog_task, 1);
3542 /* disable interrupts, without the synchronize_irq bit */
3544 E1000_WRITE_FLUSH();
3546 if (likely(napi_schedule_prep(&adapter->napi))) {
3547 adapter->total_tx_bytes = 0;
3548 adapter->total_tx_packets = 0;
3549 adapter->total_rx_bytes = 0;
3550 adapter->total_rx_packets = 0;
3551 __napi_schedule(&adapter->napi);
3553 /* this really should not happen! if it does it is basically a
3554 * bug, but not a hard error, so enable ints and continue */
3555 if (!test_bit(__E1000_DOWN, &adapter->flags))
3556 e1000_irq_enable(adapter);
3563 * e1000_clean - NAPI Rx polling callback
3564 * @adapter: board private structure
3566 static int e1000_clean(struct napi_struct *napi, int budget)
3568 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
3569 int tx_clean_complete = 0, work_done = 0;
3571 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]);
3573 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget);
3575 if (!tx_clean_complete)
3578 /* If budget not fully consumed, exit the polling mode */
3579 if (work_done < budget) {
3580 if (likely(adapter->itr_setting & 3))
3581 e1000_set_itr(adapter);
3582 napi_complete(napi);
3583 if (!test_bit(__E1000_DOWN, &adapter->flags))
3584 e1000_irq_enable(adapter);
3591 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3592 * @adapter: board private structure
3594 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
3595 struct e1000_tx_ring *tx_ring)
3597 struct e1000_hw *hw = &adapter->hw;
3598 struct net_device *netdev = adapter->netdev;
3599 struct e1000_tx_desc *tx_desc, *eop_desc;
3600 struct e1000_buffer *buffer_info;
3601 unsigned int i, eop;
3602 unsigned int count = 0;
3603 unsigned int total_tx_bytes=0, total_tx_packets=0;
3605 i = tx_ring->next_to_clean;
3606 eop = tx_ring->buffer_info[i].next_to_watch;
3607 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3609 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
3610 (count < tx_ring->count)) {
3611 bool cleaned = false;
3612 rmb(); /* read buffer_info after eop_desc */
3613 for ( ; !cleaned; count++) {
3614 tx_desc = E1000_TX_DESC(*tx_ring, i);
3615 buffer_info = &tx_ring->buffer_info[i];
3616 cleaned = (i == eop);
3619 total_tx_packets += buffer_info->segs;
3620 total_tx_bytes += buffer_info->bytecount;
3622 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3623 tx_desc->upper.data = 0;
3625 if (unlikely(++i == tx_ring->count)) i = 0;
3628 eop = tx_ring->buffer_info[i].next_to_watch;
3629 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3632 tx_ring->next_to_clean = i;
3634 #define TX_WAKE_THRESHOLD 32
3635 if (unlikely(count && netif_carrier_ok(netdev) &&
3636 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
3637 /* Make sure that anybody stopping the queue after this
3638 * sees the new next_to_clean.
3642 if (netif_queue_stopped(netdev) &&
3643 !(test_bit(__E1000_DOWN, &adapter->flags))) {
3644 netif_wake_queue(netdev);
3645 ++adapter->restart_queue;
3649 if (adapter->detect_tx_hung) {
3650 /* Detect a transmit hang in hardware, this serializes the
3651 * check with the clearing of time_stamp and movement of i */
3652 adapter->detect_tx_hung = false;
3653 if (tx_ring->buffer_info[eop].time_stamp &&
3654 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3655 (adapter->tx_timeout_factor * HZ)) &&
3656 !(er32(STATUS) & E1000_STATUS_TXOFF)) {
3658 /* detected Tx unit hang */
3659 e_err(drv, "Detected Tx Unit Hang\n"
3663 " next_to_use <%x>\n"
3664 " next_to_clean <%x>\n"
3665 "buffer_info[next_to_clean]\n"
3666 " time_stamp <%lx>\n"
3667 " next_to_watch <%x>\n"
3669 " next_to_watch.status <%x>\n",
3670 (unsigned long)((tx_ring - adapter->tx_ring) /
3671 sizeof(struct e1000_tx_ring)),
3672 readl(hw->hw_addr + tx_ring->tdh),
3673 readl(hw->hw_addr + tx_ring->tdt),
3674 tx_ring->next_to_use,
3675 tx_ring->next_to_clean,
3676 tx_ring->buffer_info[eop].time_stamp,
3679 eop_desc->upper.fields.status);
3680 netif_stop_queue(netdev);
3683 adapter->total_tx_bytes += total_tx_bytes;
3684 adapter->total_tx_packets += total_tx_packets;
3685 netdev->stats.tx_bytes += total_tx_bytes;
3686 netdev->stats.tx_packets += total_tx_packets;
3687 return count < tx_ring->count;
3691 * e1000_rx_checksum - Receive Checksum Offload for 82543
3692 * @adapter: board private structure
3693 * @status_err: receive descriptor status and error fields
3694 * @csum: receive descriptor csum field
3695 * @sk_buff: socket buffer with received data
3698 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
3699 u32 csum, struct sk_buff *skb)
3701 struct e1000_hw *hw = &adapter->hw;
3702 u16 status = (u16)status_err;
3703 u8 errors = (u8)(status_err >> 24);
3705 skb_checksum_none_assert(skb);
3707 /* 82543 or newer only */
3708 if (unlikely(hw->mac_type < e1000_82543)) return;
3709 /* Ignore Checksum bit is set */
3710 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3711 /* TCP/UDP checksum error bit is set */
3712 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3713 /* let the stack verify checksum errors */
3714 adapter->hw_csum_err++;
3717 /* TCP/UDP Checksum has not been calculated */
3718 if (!(status & E1000_RXD_STAT_TCPCS))
3721 /* It must be a TCP or UDP packet with a valid checksum */
3722 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3723 /* TCP checksum is good */
3724 skb->ip_summed = CHECKSUM_UNNECESSARY;
3726 adapter->hw_csum_good++;
3730 * e1000_consume_page - helper function
3732 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
3737 skb->data_len += length;
3738 skb->truesize += PAGE_SIZE;
3742 * e1000_receive_skb - helper function to handle rx indications
3743 * @adapter: board private structure
3744 * @status: descriptor status field as written by hardware
3745 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3746 * @skb: pointer to sk_buff to be indicated to stack
3748 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status,
3749 __le16 vlan, struct sk_buff *skb)
3751 skb->protocol = eth_type_trans(skb, adapter->netdev);
3753 if (status & E1000_RXD_STAT_VP) {
3754 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
3756 __vlan_hwaccel_put_tag(skb, vid);
3758 napi_gro_receive(&adapter->napi, skb);
3762 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3763 * @adapter: board private structure
3764 * @rx_ring: ring to clean
3765 * @work_done: amount of napi work completed this call
3766 * @work_to_do: max amount of work allowed for this call to do
3768 * the return value indicates whether actual cleaning was done, there
3769 * is no guarantee that everything was cleaned
3771 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
3772 struct e1000_rx_ring *rx_ring,
3773 int *work_done, int work_to_do)
3775 struct e1000_hw *hw = &adapter->hw;
3776 struct net_device *netdev = adapter->netdev;
3777 struct pci_dev *pdev = adapter->pdev;
3778 struct e1000_rx_desc *rx_desc, *next_rxd;
3779 struct e1000_buffer *buffer_info, *next_buffer;
3780 unsigned long irq_flags;
3783 int cleaned_count = 0;
3784 bool cleaned = false;
3785 unsigned int total_rx_bytes=0, total_rx_packets=0;
3787 i = rx_ring->next_to_clean;
3788 rx_desc = E1000_RX_DESC(*rx_ring, i);
3789 buffer_info = &rx_ring->buffer_info[i];
3791 while (rx_desc->status & E1000_RXD_STAT_DD) {
3792 struct sk_buff *skb;
3795 if (*work_done >= work_to_do)
3798 rmb(); /* read descriptor and rx_buffer_info after status DD */
3800 status = rx_desc->status;
3801 skb = buffer_info->skb;
3802 buffer_info->skb = NULL;
3804 if (++i == rx_ring->count) i = 0;
3805 next_rxd = E1000_RX_DESC(*rx_ring, i);
3808 next_buffer = &rx_ring->buffer_info[i];
3812 dma_unmap_page(&pdev->dev, buffer_info->dma,
3813 buffer_info->length, DMA_FROM_DEVICE);
3814 buffer_info->dma = 0;
3816 length = le16_to_cpu(rx_desc->length);
3818 /* errors is only valid for DD + EOP descriptors */
3819 if (unlikely((status & E1000_RXD_STAT_EOP) &&
3820 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
3821 u8 last_byte = *(skb->data + length - 1);
3822 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
3824 spin_lock_irqsave(&adapter->stats_lock,
3826 e1000_tbi_adjust_stats(hw, &adapter->stats,
3828 spin_unlock_irqrestore(&adapter->stats_lock,
3832 /* recycle both page and skb */
3833 buffer_info->skb = skb;
3834 /* an error means any chain goes out the window
3836 if (rx_ring->rx_skb_top)
3837 dev_kfree_skb(rx_ring->rx_skb_top);
3838 rx_ring->rx_skb_top = NULL;
3843 #define rxtop rx_ring->rx_skb_top
3844 if (!(status & E1000_RXD_STAT_EOP)) {
3845 /* this descriptor is only the beginning (or middle) */
3847 /* this is the beginning of a chain */
3849 skb_fill_page_desc(rxtop, 0, buffer_info->page,
3852 /* this is the middle of a chain */
3853 skb_fill_page_desc(rxtop,
3854 skb_shinfo(rxtop)->nr_frags,
3855 buffer_info->page, 0, length);
3856 /* re-use the skb, only consumed the page */
3857 buffer_info->skb = skb;
3859 e1000_consume_page(buffer_info, rxtop, length);
3863 /* end of the chain */
3864 skb_fill_page_desc(rxtop,
3865 skb_shinfo(rxtop)->nr_frags,
3866 buffer_info->page, 0, length);
3867 /* re-use the current skb, we only consumed the
3869 buffer_info->skb = skb;
3872 e1000_consume_page(buffer_info, skb, length);
3874 /* no chain, got EOP, this buf is the packet
3875 * copybreak to save the put_page/alloc_page */
3876 if (length <= copybreak &&
3877 skb_tailroom(skb) >= length) {
3879 vaddr = kmap_atomic(buffer_info->page,
3880 KM_SKB_DATA_SOFTIRQ);
3881 memcpy(skb_tail_pointer(skb), vaddr, length);
3882 kunmap_atomic(vaddr,
3883 KM_SKB_DATA_SOFTIRQ);
3884 /* re-use the page, so don't erase
3885 * buffer_info->page */
3886 skb_put(skb, length);
3888 skb_fill_page_desc(skb, 0,
3889 buffer_info->page, 0,
3891 e1000_consume_page(buffer_info, skb,
3897 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3898 e1000_rx_checksum(adapter,
3900 ((u32)(rx_desc->errors) << 24),
3901 le16_to_cpu(rx_desc->csum), skb);
3903 pskb_trim(skb, skb->len - 4);
3905 /* probably a little skewed due to removing CRC */
3906 total_rx_bytes += skb->len;
3909 /* eth type trans needs skb->data to point to something */
3910 if (!pskb_may_pull(skb, ETH_HLEN)) {
3911 e_err(drv, "pskb_may_pull failed.\n");
3916 e1000_receive_skb(adapter, status, rx_desc->special, skb);
3919 rx_desc->status = 0;
3921 /* return some buffers to hardware, one at a time is too slow */
3922 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3923 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3927 /* use prefetched values */
3929 buffer_info = next_buffer;
3931 rx_ring->next_to_clean = i;
3933 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3935 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3937 adapter->total_rx_packets += total_rx_packets;
3938 adapter->total_rx_bytes += total_rx_bytes;
3939 netdev->stats.rx_bytes += total_rx_bytes;
3940 netdev->stats.rx_packets += total_rx_packets;
3945 * this should improve performance for small packets with large amounts
3946 * of reassembly being done in the stack
3948 static void e1000_check_copybreak(struct net_device *netdev,
3949 struct e1000_buffer *buffer_info,
3950 u32 length, struct sk_buff **skb)
3952 struct sk_buff *new_skb;
3954 if (length > copybreak)
3957 new_skb = netdev_alloc_skb_ip_align(netdev, length);
3961 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
3962 (*skb)->data - NET_IP_ALIGN,
3963 length + NET_IP_ALIGN);
3964 /* save the skb in buffer_info as good */
3965 buffer_info->skb = *skb;
3970 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3971 * @adapter: board private structure
3972 * @rx_ring: ring to clean
3973 * @work_done: amount of napi work completed this call
3974 * @work_to_do: max amount of work allowed for this call to do
3976 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
3977 struct e1000_rx_ring *rx_ring,
3978 int *work_done, int work_to_do)
3980 struct e1000_hw *hw = &adapter->hw;
3981 struct net_device *netdev = adapter->netdev;
3982 struct pci_dev *pdev = adapter->pdev;
3983 struct e1000_rx_desc *rx_desc, *next_rxd;
3984 struct e1000_buffer *buffer_info, *next_buffer;
3985 unsigned long flags;
3988 int cleaned_count = 0;
3989 bool cleaned = false;
3990 unsigned int total_rx_bytes=0, total_rx_packets=0;
3992 i = rx_ring->next_to_clean;
3993 rx_desc = E1000_RX_DESC(*rx_ring, i);
3994 buffer_info = &rx_ring->buffer_info[i];
3996 while (rx_desc->status & E1000_RXD_STAT_DD) {
3997 struct sk_buff *skb;
4000 if (*work_done >= work_to_do)
4003 rmb(); /* read descriptor and rx_buffer_info after status DD */
4005 status = rx_desc->status;
4006 skb = buffer_info->skb;
4007 buffer_info->skb = NULL;
4009 prefetch(skb->data - NET_IP_ALIGN);
4011 if (++i == rx_ring->count) i = 0;
4012 next_rxd = E1000_RX_DESC(*rx_ring, i);
4015 next_buffer = &rx_ring->buffer_info[i];
4019 dma_unmap_single(&pdev->dev, buffer_info->dma,
4020 buffer_info->length, DMA_FROM_DEVICE);
4021 buffer_info->dma = 0;
4023 length = le16_to_cpu(rx_desc->length);
4024 /* !EOP means multiple descriptors were used to store a single
4025 * packet, if thats the case we need to toss it. In fact, we
4026 * to toss every packet with the EOP bit clear and the next
4027 * frame that _does_ have the EOP bit set, as it is by
4028 * definition only a frame fragment
4030 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
4031 adapter->discarding = true;
4033 if (adapter->discarding) {
4034 /* All receives must fit into a single buffer */
4035 e_dbg("Receive packet consumed multiple buffers\n");
4037 buffer_info->skb = skb;
4038 if (status & E1000_RXD_STAT_EOP)
4039 adapter->discarding = false;
4043 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
4044 u8 last_byte = *(skb->data + length - 1);
4045 if (TBI_ACCEPT(hw, status, rx_desc->errors, length,
4047 spin_lock_irqsave(&adapter->stats_lock, flags);
4048 e1000_tbi_adjust_stats(hw, &adapter->stats,
4050 spin_unlock_irqrestore(&adapter->stats_lock,
4055 buffer_info->skb = skb;
4060 /* adjust length to remove Ethernet CRC, this must be
4061 * done after the TBI_ACCEPT workaround above */
4064 /* probably a little skewed due to removing CRC */
4065 total_rx_bytes += length;
4068 e1000_check_copybreak(netdev, buffer_info, length, &skb);
4070 skb_put(skb, length);
4072 /* Receive Checksum Offload */
4073 e1000_rx_checksum(adapter,
4075 ((u32)(rx_desc->errors) << 24),
4076 le16_to_cpu(rx_desc->csum), skb);
4078 e1000_receive_skb(adapter, status, rx_desc->special, skb);
4081 rx_desc->status = 0;
4083 /* return some buffers to hardware, one at a time is too slow */
4084 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
4085 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4089 /* use prefetched values */
4091 buffer_info = next_buffer;
4093 rx_ring->next_to_clean = i;
4095 cleaned_count = E1000_DESC_UNUSED(rx_ring);
4097 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
4099 adapter->total_rx_packets += total_rx_packets;
4100 adapter->total_rx_bytes += total_rx_bytes;
4101 netdev->stats.rx_bytes += total_rx_bytes;
4102 netdev->stats.rx_packets += total_rx_packets;
4107 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4108 * @adapter: address of board private structure
4109 * @rx_ring: pointer to receive ring structure
4110 * @cleaned_count: number of buffers to allocate this pass
4114 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
4115 struct e1000_rx_ring *rx_ring, int cleaned_count)
4117 struct net_device *netdev = adapter->netdev;
4118 struct pci_dev *pdev = adapter->pdev;
4119 struct e1000_rx_desc *rx_desc;
4120 struct e1000_buffer *buffer_info;
4121 struct sk_buff *skb;
4123 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ;
4125 i = rx_ring->next_to_use;
4126 buffer_info = &rx_ring->buffer_info[i];
4128 while (cleaned_count--) {
4129 skb = buffer_info->skb;
4135 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4136 if (unlikely(!skb)) {
4137 /* Better luck next round */
4138 adapter->alloc_rx_buff_failed++;
4142 /* Fix for errata 23, can't cross 64kB boundary */
4143 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4144 struct sk_buff *oldskb = skb;
4145 e_err(rx_err, "skb align check failed: %u bytes at "
4146 "%p\n", bufsz, skb->data);
4147 /* Try again, without freeing the previous */
4148 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4149 /* Failed allocation, critical failure */
4151 dev_kfree_skb(oldskb);
4152 adapter->alloc_rx_buff_failed++;
4156 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4159 dev_kfree_skb(oldskb);
4160 break; /* while (cleaned_count--) */
4163 /* Use new allocation */
4164 dev_kfree_skb(oldskb);
4166 buffer_info->skb = skb;
4167 buffer_info->length = adapter->rx_buffer_len;
4169 /* allocate a new page if necessary */
4170 if (!buffer_info->page) {
4171 buffer_info->page = alloc_page(GFP_ATOMIC);
4172 if (unlikely(!buffer_info->page)) {
4173 adapter->alloc_rx_buff_failed++;
4178 if (!buffer_info->dma) {
4179 buffer_info->dma = dma_map_page(&pdev->dev,
4180 buffer_info->page, 0,
4181 buffer_info->length,
4183 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4184 put_page(buffer_info->page);
4186 buffer_info->page = NULL;
4187 buffer_info->skb = NULL;
4188 buffer_info->dma = 0;
4189 adapter->alloc_rx_buff_failed++;
4190 break; /* while !buffer_info->skb */
4194 rx_desc = E1000_RX_DESC(*rx_ring, i);
4195 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4197 if (unlikely(++i == rx_ring->count))
4199 buffer_info = &rx_ring->buffer_info[i];
4202 if (likely(rx_ring->next_to_use != i)) {
4203 rx_ring->next_to_use = i;
4204 if (unlikely(i-- == 0))
4205 i = (rx_ring->count - 1);
4207 /* Force memory writes to complete before letting h/w
4208 * know there are new descriptors to fetch. (Only
4209 * applicable for weak-ordered memory model archs,
4210 * such as IA-64). */
4212 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
4217 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4218 * @adapter: address of board private structure
4221 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
4222 struct e1000_rx_ring *rx_ring,
4225 struct e1000_hw *hw = &adapter->hw;
4226 struct net_device *netdev = adapter->netdev;
4227 struct pci_dev *pdev = adapter->pdev;
4228 struct e1000_rx_desc *rx_desc;
4229 struct e1000_buffer *buffer_info;
4230 struct sk_buff *skb;
4232 unsigned int bufsz = adapter->rx_buffer_len;
4234 i = rx_ring->next_to_use;
4235 buffer_info = &rx_ring->buffer_info[i];
4237 while (cleaned_count--) {
4238 skb = buffer_info->skb;
4244 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4245 if (unlikely(!skb)) {
4246 /* Better luck next round */
4247 adapter->alloc_rx_buff_failed++;
4251 /* Fix for errata 23, can't cross 64kB boundary */
4252 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4253 struct sk_buff *oldskb = skb;
4254 e_err(rx_err, "skb align check failed: %u bytes at "
4255 "%p\n", bufsz, skb->data);
4256 /* Try again, without freeing the previous */
4257 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
4258 /* Failed allocation, critical failure */
4260 dev_kfree_skb(oldskb);
4261 adapter->alloc_rx_buff_failed++;
4265 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
4268 dev_kfree_skb(oldskb);
4269 adapter->alloc_rx_buff_failed++;
4270 break; /* while !buffer_info->skb */
4273 /* Use new allocation */
4274 dev_kfree_skb(oldskb);
4276 buffer_info->skb = skb;
4277 buffer_info->length = adapter->rx_buffer_len;
4279 buffer_info->dma = dma_map_single(&pdev->dev,
4281 buffer_info->length,
4283 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
4285 buffer_info->skb = NULL;
4286 buffer_info->dma = 0;
4287 adapter->alloc_rx_buff_failed++;
4288 break; /* while !buffer_info->skb */
4292 * XXX if it was allocated cleanly it will never map to a
4296 /* Fix for errata 23, can't cross 64kB boundary */
4297 if (!e1000_check_64k_bound(adapter,
4298 (void *)(unsigned long)buffer_info->dma,
4299 adapter->rx_buffer_len)) {
4300 e_err(rx_err, "dma align check failed: %u bytes at "
4301 "%p\n", adapter->rx_buffer_len,
4302 (void *)(unsigned long)buffer_info->dma);
4304 buffer_info->skb = NULL;
4306 dma_unmap_single(&pdev->dev, buffer_info->dma,
4307 adapter->rx_buffer_len,
4309 buffer_info->dma = 0;
4311 adapter->alloc_rx_buff_failed++;
4312 break; /* while !buffer_info->skb */
4314 rx_desc = E1000_RX_DESC(*rx_ring, i);
4315 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4317 if (unlikely(++i == rx_ring->count))
4319 buffer_info = &rx_ring->buffer_info[i];
4322 if (likely(rx_ring->next_to_use != i)) {
4323 rx_ring->next_to_use = i;
4324 if (unlikely(i-- == 0))
4325 i = (rx_ring->count - 1);
4327 /* Force memory writes to complete before letting h/w
4328 * know there are new descriptors to fetch. (Only
4329 * applicable for weak-ordered memory model archs,
4330 * such as IA-64). */
4332 writel(i, hw->hw_addr + rx_ring->rdt);
4337 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4341 static void e1000_smartspeed(struct e1000_adapter *adapter)
4343 struct e1000_hw *hw = &adapter->hw;
4347 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg ||
4348 !(hw->autoneg_advertised & ADVERTISE_1000_FULL))
4351 if (adapter->smartspeed == 0) {
4352 /* If Master/Slave config fault is asserted twice,
4353 * we assume back-to-back */
4354 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4355 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4356 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status);
4357 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4358 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4359 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4360 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4361 e1000_write_phy_reg(hw, PHY_1000T_CTRL,
4363 adapter->smartspeed++;
4364 if (!e1000_phy_setup_autoneg(hw) &&
4365 !e1000_read_phy_reg(hw, PHY_CTRL,
4367 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4368 MII_CR_RESTART_AUTO_NEG);
4369 e1000_write_phy_reg(hw, PHY_CTRL,
4374 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4375 /* If still no link, perhaps using 2/3 pair cable */
4376 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl);
4377 phy_ctrl |= CR_1000T_MS_ENABLE;
4378 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl);
4379 if (!e1000_phy_setup_autoneg(hw) &&
4380 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) {
4381 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4382 MII_CR_RESTART_AUTO_NEG);
4383 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl);
4386 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4387 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4388 adapter->smartspeed = 0;
4398 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4404 return e1000_mii_ioctl(netdev, ifr, cmd);
4417 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4420 struct e1000_adapter *adapter = netdev_priv(netdev);
4421 struct e1000_hw *hw = &adapter->hw;
4422 struct mii_ioctl_data *data = if_mii(ifr);
4425 unsigned long flags;
4427 if (hw->media_type != e1000_media_type_copper)
4432 data->phy_id = hw->phy_addr;
4435 spin_lock_irqsave(&adapter->stats_lock, flags);
4436 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F,
4438 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4441 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4444 if (data->reg_num & ~(0x1F))
4446 mii_reg = data->val_in;
4447 spin_lock_irqsave(&adapter->stats_lock, flags);
4448 if (e1000_write_phy_reg(hw, data->reg_num,
4450 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4453 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4454 if (hw->media_type == e1000_media_type_copper) {
4455 switch (data->reg_num) {
4457 if (mii_reg & MII_CR_POWER_DOWN)
4459 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4461 hw->autoneg_advertised = 0x2F;
4466 else if (mii_reg & 0x2000)
4470 retval = e1000_set_spd_dplx(
4478 if (netif_running(adapter->netdev))
4479 e1000_reinit_locked(adapter);
4481 e1000_reset(adapter);
4483 case M88E1000_PHY_SPEC_CTRL:
4484 case M88E1000_EXT_PHY_SPEC_CTRL:
4485 if (e1000_phy_reset(hw))
4490 switch (data->reg_num) {
4492 if (mii_reg & MII_CR_POWER_DOWN)
4494 if (netif_running(adapter->netdev))
4495 e1000_reinit_locked(adapter);
4497 e1000_reset(adapter);
4505 return E1000_SUCCESS;
4508 void e1000_pci_set_mwi(struct e1000_hw *hw)
4510 struct e1000_adapter *adapter = hw->back;
4511 int ret_val = pci_set_mwi(adapter->pdev);
4514 e_err(probe, "Error in setting MWI\n");
4517 void e1000_pci_clear_mwi(struct e1000_hw *hw)
4519 struct e1000_adapter *adapter = hw->back;
4521 pci_clear_mwi(adapter->pdev);
4524 int e1000_pcix_get_mmrbc(struct e1000_hw *hw)
4526 struct e1000_adapter *adapter = hw->back;
4527 return pcix_get_mmrbc(adapter->pdev);
4530 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc)
4532 struct e1000_adapter *adapter = hw->back;
4533 pcix_set_mmrbc(adapter->pdev, mmrbc);
4536 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value)
4541 static bool e1000_vlan_used(struct e1000_adapter *adapter)
4545 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4550 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter,
4553 struct e1000_hw *hw = &adapter->hw;
4556 if (!test_bit(__E1000_DOWN, &adapter->flags))
4557 e1000_irq_disable(adapter);
4560 /* enable VLAN receive filtering */
4562 rctl &= ~E1000_RCTL_CFIEN;
4563 if (!(adapter->netdev->flags & IFF_PROMISC))
4564 rctl |= E1000_RCTL_VFE;
4566 e1000_update_mng_vlan(adapter);
4568 /* disable VLAN receive filtering */
4570 rctl &= ~E1000_RCTL_VFE;
4574 if (!test_bit(__E1000_DOWN, &adapter->flags))
4575 e1000_irq_enable(adapter);
4578 static void e1000_vlan_mode(struct net_device *netdev,
4579 netdev_features_t features)
4581 struct e1000_adapter *adapter = netdev_priv(netdev);
4582 struct e1000_hw *hw = &adapter->hw;
4585 if (!test_bit(__E1000_DOWN, &adapter->flags))
4586 e1000_irq_disable(adapter);
4589 if (features & NETIF_F_HW_VLAN_RX) {
4590 /* enable VLAN tag insert/strip */
4591 ctrl |= E1000_CTRL_VME;
4593 /* disable VLAN tag insert/strip */
4594 ctrl &= ~E1000_CTRL_VME;
4598 if (!test_bit(__E1000_DOWN, &adapter->flags))
4599 e1000_irq_enable(adapter);
4602 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
4604 struct e1000_adapter *adapter = netdev_priv(netdev);
4605 struct e1000_hw *hw = &adapter->hw;
4608 if ((hw->mng_cookie.status &
4609 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4610 (vid == adapter->mng_vlan_id))
4613 if (!e1000_vlan_used(adapter))
4614 e1000_vlan_filter_on_off(adapter, true);
4616 /* add VID to filter table */
4617 index = (vid >> 5) & 0x7F;
4618 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4619 vfta |= (1 << (vid & 0x1F));
4620 e1000_write_vfta(hw, index, vfta);
4622 set_bit(vid, adapter->active_vlans);
4627 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
4629 struct e1000_adapter *adapter = netdev_priv(netdev);
4630 struct e1000_hw *hw = &adapter->hw;
4633 if (!test_bit(__E1000_DOWN, &adapter->flags))
4634 e1000_irq_disable(adapter);
4635 if (!test_bit(__E1000_DOWN, &adapter->flags))
4636 e1000_irq_enable(adapter);
4638 /* remove VID from filter table */
4639 index = (vid >> 5) & 0x7F;
4640 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index);
4641 vfta &= ~(1 << (vid & 0x1F));
4642 e1000_write_vfta(hw, index, vfta);
4644 clear_bit(vid, adapter->active_vlans);
4646 if (!e1000_vlan_used(adapter))
4647 e1000_vlan_filter_on_off(adapter, false);
4652 static void e1000_restore_vlan(struct e1000_adapter *adapter)
4656 if (!e1000_vlan_used(adapter))
4659 e1000_vlan_filter_on_off(adapter, true);
4660 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4661 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4664 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx)
4666 struct e1000_hw *hw = &adapter->hw;
4670 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4671 * for the switch() below to work */
4672 if ((spd & 1) || (dplx & ~1))
4675 /* Fiber NICs only allow 1000 gbps Full duplex */
4676 if ((hw->media_type == e1000_media_type_fiber) &&
4677 spd != SPEED_1000 &&
4678 dplx != DUPLEX_FULL)
4681 switch (spd + dplx) {
4682 case SPEED_10 + DUPLEX_HALF:
4683 hw->forced_speed_duplex = e1000_10_half;
4685 case SPEED_10 + DUPLEX_FULL:
4686 hw->forced_speed_duplex = e1000_10_full;
4688 case SPEED_100 + DUPLEX_HALF:
4689 hw->forced_speed_duplex = e1000_100_half;
4691 case SPEED_100 + DUPLEX_FULL:
4692 hw->forced_speed_duplex = e1000_100_full;
4694 case SPEED_1000 + DUPLEX_FULL:
4696 hw->autoneg_advertised = ADVERTISE_1000_FULL;
4698 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4705 e_err(probe, "Unsupported Speed/Duplex configuration\n");
4709 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4711 struct net_device *netdev = pci_get_drvdata(pdev);
4712 struct e1000_adapter *adapter = netdev_priv(netdev);
4713 struct e1000_hw *hw = &adapter->hw;
4714 u32 ctrl, ctrl_ext, rctl, status;
4715 u32 wufc = adapter->wol;
4720 netif_device_detach(netdev);
4722 if (netif_running(netdev)) {
4723 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags));
4724 e1000_down(adapter);
4728 retval = pci_save_state(pdev);
4733 status = er32(STATUS);
4734 if (status & E1000_STATUS_LU)
4735 wufc &= ~E1000_WUFC_LNKC;
4738 e1000_setup_rctl(adapter);
4739 e1000_set_rx_mode(netdev);
4741 /* turn on all-multi mode if wake on multicast is enabled */
4742 if (wufc & E1000_WUFC_MC) {
4744 rctl |= E1000_RCTL_MPE;
4748 if (hw->mac_type >= e1000_82540) {
4750 /* advertise wake from D3Cold */
4751 #define E1000_CTRL_ADVD3WUC 0x00100000
4752 /* phy power management enable */
4753 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4754 ctrl |= E1000_CTRL_ADVD3WUC |
4755 E1000_CTRL_EN_PHY_PWR_MGMT;
4759 if (hw->media_type == e1000_media_type_fiber ||
4760 hw->media_type == e1000_media_type_internal_serdes) {
4761 /* keep the laser running in D3 */
4762 ctrl_ext = er32(CTRL_EXT);
4763 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4764 ew32(CTRL_EXT, ctrl_ext);
4767 ew32(WUC, E1000_WUC_PME_EN);
4774 e1000_release_manageability(adapter);
4776 *enable_wake = !!wufc;
4778 /* make sure adapter isn't asleep if manageability is enabled */
4779 if (adapter->en_mng_pt)
4780 *enable_wake = true;
4782 if (netif_running(netdev))
4783 e1000_free_irq(adapter);
4785 pci_disable_device(pdev);
4791 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4796 retval = __e1000_shutdown(pdev, &wake);
4801 pci_prepare_to_sleep(pdev);
4803 pci_wake_from_d3(pdev, false);
4804 pci_set_power_state(pdev, PCI_D3hot);
4810 static int e1000_resume(struct pci_dev *pdev)
4812 struct net_device *netdev = pci_get_drvdata(pdev);
4813 struct e1000_adapter *adapter = netdev_priv(netdev);
4814 struct e1000_hw *hw = &adapter->hw;
4817 pci_set_power_state(pdev, PCI_D0);
4818 pci_restore_state(pdev);
4819 pci_save_state(pdev);
4821 if (adapter->need_ioport)
4822 err = pci_enable_device(pdev);
4824 err = pci_enable_device_mem(pdev);
4826 pr_err("Cannot enable PCI device from suspend\n");
4829 pci_set_master(pdev);
4831 pci_enable_wake(pdev, PCI_D3hot, 0);
4832 pci_enable_wake(pdev, PCI_D3cold, 0);
4834 if (netif_running(netdev)) {
4835 err = e1000_request_irq(adapter);
4840 e1000_power_up_phy(adapter);
4841 e1000_reset(adapter);
4844 e1000_init_manageability(adapter);
4846 if (netif_running(netdev))
4849 netif_device_attach(netdev);
4855 static void e1000_shutdown(struct pci_dev *pdev)
4859 __e1000_shutdown(pdev, &wake);
4861 if (system_state == SYSTEM_POWER_OFF) {
4862 pci_wake_from_d3(pdev, wake);
4863 pci_set_power_state(pdev, PCI_D3hot);
4867 #ifdef CONFIG_NET_POLL_CONTROLLER
4869 * Polling 'interrupt' - used by things like netconsole to send skbs
4870 * without having to re-enable interrupts. It's not called while
4871 * the interrupt routine is executing.
4873 static void e1000_netpoll(struct net_device *netdev)
4875 struct e1000_adapter *adapter = netdev_priv(netdev);
4877 disable_irq(adapter->pdev->irq);
4878 e1000_intr(adapter->pdev->irq, netdev);
4879 enable_irq(adapter->pdev->irq);
4884 * e1000_io_error_detected - called when PCI error is detected
4885 * @pdev: Pointer to PCI device
4886 * @state: The current pci connection state
4888 * This function is called after a PCI bus error affecting
4889 * this device has been detected.
4891 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4892 pci_channel_state_t state)
4894 struct net_device *netdev = pci_get_drvdata(pdev);
4895 struct e1000_adapter *adapter = netdev_priv(netdev);
4897 netif_device_detach(netdev);
4899 if (state == pci_channel_io_perm_failure)
4900 return PCI_ERS_RESULT_DISCONNECT;
4902 if (netif_running(netdev))
4903 e1000_down(adapter);
4904 pci_disable_device(pdev);
4906 /* Request a slot slot reset. */
4907 return PCI_ERS_RESULT_NEED_RESET;
4911 * e1000_io_slot_reset - called after the pci bus has been reset.
4912 * @pdev: Pointer to PCI device
4914 * Restart the card from scratch, as if from a cold-boot. Implementation
4915 * resembles the first-half of the e1000_resume routine.
4917 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4919 struct net_device *netdev = pci_get_drvdata(pdev);
4920 struct e1000_adapter *adapter = netdev_priv(netdev);
4921 struct e1000_hw *hw = &adapter->hw;
4924 if (adapter->need_ioport)
4925 err = pci_enable_device(pdev);
4927 err = pci_enable_device_mem(pdev);
4929 pr_err("Cannot re-enable PCI device after reset.\n");
4930 return PCI_ERS_RESULT_DISCONNECT;
4932 pci_set_master(pdev);
4934 pci_enable_wake(pdev, PCI_D3hot, 0);
4935 pci_enable_wake(pdev, PCI_D3cold, 0);
4937 e1000_reset(adapter);
4940 return PCI_ERS_RESULT_RECOVERED;
4944 * e1000_io_resume - called when traffic can start flowing again.
4945 * @pdev: Pointer to PCI device
4947 * This callback is called when the error recovery driver tells us that
4948 * its OK to resume normal operation. Implementation resembles the
4949 * second-half of the e1000_resume routine.
4951 static void e1000_io_resume(struct pci_dev *pdev)
4953 struct net_device *netdev = pci_get_drvdata(pdev);
4954 struct e1000_adapter *adapter = netdev_priv(netdev);
4956 e1000_init_manageability(adapter);
4958 if (netif_running(netdev)) {
4959 if (e1000_up(adapter)) {
4960 pr_info("can't bring device back up after reset\n");
4965 netif_device_attach(netdev);