1 /*******************************************************************************
4 Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2 of the License, or (at your option)
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 You should have received a copy of the GNU General Public License along with
17 this program; if not, write to the Free Software Foundation, Inc., 59
18 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 The full GNU General Public License is included in this distribution in the
24 Linux NICS <linux.nics@intel.com>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
33 * o incorporate fix for recycled skbs from IBM LTC
35 * o Honor eeprom setting for enabling/disabling Wake On Lan
37 * o Fix memory leak in rx ring handling for PCI Express adapters
39 * o Patch from Jesper Juhl to remove redundant NULL checks for kfree
41 * o Render logic that sets/resets DRV_LOAD as inline functions to
42 * avoid code replication. If f/w is AMT then set DRV_LOAD only when
43 * network interface is open.
44 * o Handle DRV_LOAD set/reset in cases where AMT uses VLANs.
45 * o Adjust PBA partioning for Jumbo frames using MTU size and not
48 * o Use adapter->tx_timeout_factor in Tx Hung Detect logic
50 * o Support for 8086:10B5 device (Quad Port)
52 * o In AMT enabled configurations, set/reset DRV_LOAD bit on interface
55 * o Invoke e1000_check_mng_mode only for 8257x controllers since it
56 * accesses the FWSM that is not supported in other controllers
58 * o Add support for device id E1000_DEV_ID_82546GB_QUAD_COPPER
59 * o set RCTL:SECRC only for controllers newer than 82543.
60 * o When the n/w interface comes down reset DRV_LOAD bit to notify f/w.
61 * This code was moved from e1000_remove to e1000_close
63 * o Fix error in updating RDT in el1000_alloc_rx_buffers[_ps] -- one off.
64 * o Enable fc by default on 82573 controllers (do not read eeprom)
65 * o Fix rx_errors statistic not to include missed_packet_count
66 * o Fix rx_dropped statistic not to include missed_packet_count
69 * o Remove call to update statistics from the controller ib e1000_get_stats
71 * o Improved algorithm for rx buffer allocation/rdt update
72 * o Flow control watermarks relative to rx PBA size
73 * o Simplified 'Tx Hung' detect logic
75 * o Report rx buffer allocation failures and tx timeout counts in stats
77 * o Implement workaround for controller erratum -- linear non-tso packet
78 * following a TSO gets written back prematurely
80 * o Set netdev->tx_queue_len based on link speed/duplex settings.
81 * o Fix net_stats.rx_fifo_errors <p@draigBrady.com>
82 * o Do not power off PHY if SoL/IDER session is active
84 * o Fix loopback test setup/cleanup for 82571/3 controllers
85 * o Fix parsing of outgoing packets (e1000_transfer_dhcp_info) to treat
87 * o Prevent operations that will cause the PHY to be reset if SoL/IDER
88 * sessions are active and log a message
90 * o used fixed size descriptors for all MTU sizes, reduces memory load
92 * o Fixed ethtool diagnostics
93 * o Enabled flow control to take default eeprom settings
94 * o Added stats_lock around e1000_read_phy_reg commands to avoid concurrent
95 * calls, one from mii_ioctl and other from within update_stats while
96 * processing MIIREG ioctl.
99 char e1000_driver_name[] = "e1000";
100 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
101 #ifndef CONFIG_E1000_NAPI
104 #define DRIVERNAPI "-NAPI"
106 #define DRV_VERSION "7.0.33-k2"DRIVERNAPI
107 char e1000_driver_version[] = DRV_VERSION;
108 static char e1000_copyright[] = "Copyright (c) 1999-2005 Intel Corporation.";
110 /* e1000_pci_tbl - PCI Device ID Table
112 * Last entry must be all 0s
114 * Macro expands to...
115 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
117 static struct pci_device_id e1000_pci_tbl[] = {
118 INTEL_E1000_ETHERNET_DEVICE(0x1000),
119 INTEL_E1000_ETHERNET_DEVICE(0x1001),
120 INTEL_E1000_ETHERNET_DEVICE(0x1004),
121 INTEL_E1000_ETHERNET_DEVICE(0x1008),
122 INTEL_E1000_ETHERNET_DEVICE(0x1009),
123 INTEL_E1000_ETHERNET_DEVICE(0x100C),
124 INTEL_E1000_ETHERNET_DEVICE(0x100D),
125 INTEL_E1000_ETHERNET_DEVICE(0x100E),
126 INTEL_E1000_ETHERNET_DEVICE(0x100F),
127 INTEL_E1000_ETHERNET_DEVICE(0x1010),
128 INTEL_E1000_ETHERNET_DEVICE(0x1011),
129 INTEL_E1000_ETHERNET_DEVICE(0x1012),
130 INTEL_E1000_ETHERNET_DEVICE(0x1013),
131 INTEL_E1000_ETHERNET_DEVICE(0x1014),
132 INTEL_E1000_ETHERNET_DEVICE(0x1015),
133 INTEL_E1000_ETHERNET_DEVICE(0x1016),
134 INTEL_E1000_ETHERNET_DEVICE(0x1017),
135 INTEL_E1000_ETHERNET_DEVICE(0x1018),
136 INTEL_E1000_ETHERNET_DEVICE(0x1019),
137 INTEL_E1000_ETHERNET_DEVICE(0x101A),
138 INTEL_E1000_ETHERNET_DEVICE(0x101D),
139 INTEL_E1000_ETHERNET_DEVICE(0x101E),
140 INTEL_E1000_ETHERNET_DEVICE(0x1026),
141 INTEL_E1000_ETHERNET_DEVICE(0x1027),
142 INTEL_E1000_ETHERNET_DEVICE(0x1028),
143 INTEL_E1000_ETHERNET_DEVICE(0x105E),
144 INTEL_E1000_ETHERNET_DEVICE(0x105F),
145 INTEL_E1000_ETHERNET_DEVICE(0x1060),
146 INTEL_E1000_ETHERNET_DEVICE(0x1075),
147 INTEL_E1000_ETHERNET_DEVICE(0x1076),
148 INTEL_E1000_ETHERNET_DEVICE(0x1077),
149 INTEL_E1000_ETHERNET_DEVICE(0x1078),
150 INTEL_E1000_ETHERNET_DEVICE(0x1079),
151 INTEL_E1000_ETHERNET_DEVICE(0x107A),
152 INTEL_E1000_ETHERNET_DEVICE(0x107B),
153 INTEL_E1000_ETHERNET_DEVICE(0x107C),
154 INTEL_E1000_ETHERNET_DEVICE(0x107D),
155 INTEL_E1000_ETHERNET_DEVICE(0x107E),
156 INTEL_E1000_ETHERNET_DEVICE(0x107F),
157 INTEL_E1000_ETHERNET_DEVICE(0x108A),
158 INTEL_E1000_ETHERNET_DEVICE(0x108B),
159 INTEL_E1000_ETHERNET_DEVICE(0x108C),
160 INTEL_E1000_ETHERNET_DEVICE(0x1096),
161 INTEL_E1000_ETHERNET_DEVICE(0x1098),
162 INTEL_E1000_ETHERNET_DEVICE(0x1099),
163 INTEL_E1000_ETHERNET_DEVICE(0x109A),
164 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
165 INTEL_E1000_ETHERNET_DEVICE(0x10B9),
166 /* required last entry */
170 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
172 int e1000_up(struct e1000_adapter *adapter);
173 void e1000_down(struct e1000_adapter *adapter);
174 void e1000_reset(struct e1000_adapter *adapter);
175 int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
176 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter);
177 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter);
178 void e1000_free_all_tx_resources(struct e1000_adapter *adapter);
179 void e1000_free_all_rx_resources(struct e1000_adapter *adapter);
180 static int e1000_setup_tx_resources(struct e1000_adapter *adapter,
181 struct e1000_tx_ring *txdr);
182 static int e1000_setup_rx_resources(struct e1000_adapter *adapter,
183 struct e1000_rx_ring *rxdr);
184 static void e1000_free_tx_resources(struct e1000_adapter *adapter,
185 struct e1000_tx_ring *tx_ring);
186 static void e1000_free_rx_resources(struct e1000_adapter *adapter,
187 struct e1000_rx_ring *rx_ring);
188 void e1000_update_stats(struct e1000_adapter *adapter);
190 /* Local Function Prototypes */
192 static int e1000_init_module(void);
193 static void e1000_exit_module(void);
194 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
195 static void __devexit e1000_remove(struct pci_dev *pdev);
196 static int e1000_alloc_queues(struct e1000_adapter *adapter);
197 static int e1000_sw_init(struct e1000_adapter *adapter);
198 static int e1000_open(struct net_device *netdev);
199 static int e1000_close(struct net_device *netdev);
200 static void e1000_configure_tx(struct e1000_adapter *adapter);
201 static void e1000_configure_rx(struct e1000_adapter *adapter);
202 static void e1000_setup_rctl(struct e1000_adapter *adapter);
203 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter);
204 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter);
205 static void e1000_clean_tx_ring(struct e1000_adapter *adapter,
206 struct e1000_tx_ring *tx_ring);
207 static void e1000_clean_rx_ring(struct e1000_adapter *adapter,
208 struct e1000_rx_ring *rx_ring);
209 static void e1000_set_multi(struct net_device *netdev);
210 static void e1000_update_phy_info(unsigned long data);
211 static void e1000_watchdog(unsigned long data);
212 static void e1000_watchdog_task(struct e1000_adapter *adapter);
213 static void e1000_82547_tx_fifo_stall(unsigned long data);
214 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
215 static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
216 static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
217 static int e1000_set_mac(struct net_device *netdev, void *p);
218 static irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
219 static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter,
220 struct e1000_tx_ring *tx_ring);
221 #ifdef CONFIG_E1000_NAPI
222 static int e1000_clean(struct net_device *poll_dev, int *budget);
223 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
224 struct e1000_rx_ring *rx_ring,
225 int *work_done, int work_to_do);
226 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
227 struct e1000_rx_ring *rx_ring,
228 int *work_done, int work_to_do);
230 static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
231 struct e1000_rx_ring *rx_ring);
232 static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
233 struct e1000_rx_ring *rx_ring);
235 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
236 struct e1000_rx_ring *rx_ring,
238 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
239 struct e1000_rx_ring *rx_ring,
241 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
242 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
244 void e1000_set_ethtool_ops(struct net_device *netdev);
245 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
246 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
247 static void e1000_tx_timeout(struct net_device *dev);
248 static void e1000_reset_task(struct net_device *dev);
249 static void e1000_smartspeed(struct e1000_adapter *adapter);
250 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
251 struct sk_buff *skb);
253 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
254 static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
255 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
256 static void e1000_restore_vlan(struct e1000_adapter *adapter);
259 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state);
260 static int e1000_resume(struct pci_dev *pdev);
263 #ifdef CONFIG_NET_POLL_CONTROLLER
264 /* for netdump / net console */
265 static void e1000_netpoll (struct net_device *netdev);
269 /* Exported from other modules */
271 extern void e1000_check_options(struct e1000_adapter *adapter);
273 static struct pci_driver e1000_driver = {
274 .name = e1000_driver_name,
275 .id_table = e1000_pci_tbl,
276 .probe = e1000_probe,
277 .remove = __devexit_p(e1000_remove),
278 /* Power Managment Hooks */
280 .suspend = e1000_suspend,
281 .resume = e1000_resume
285 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
286 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
287 MODULE_LICENSE("GPL");
288 MODULE_VERSION(DRV_VERSION);
290 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
291 module_param(debug, int, 0);
292 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
295 * e1000_init_module - Driver Registration Routine
297 * e1000_init_module is the first routine called when the driver is
298 * loaded. All it does is register with the PCI subsystem.
302 e1000_init_module(void)
305 printk(KERN_INFO "%s - version %s\n",
306 e1000_driver_string, e1000_driver_version);
308 printk(KERN_INFO "%s\n", e1000_copyright);
310 ret = pci_module_init(&e1000_driver);
315 module_init(e1000_init_module);
318 * e1000_exit_module - Driver Exit Cleanup Routine
320 * e1000_exit_module is called just before the driver is removed
325 e1000_exit_module(void)
327 pci_unregister_driver(&e1000_driver);
330 module_exit(e1000_exit_module);
333 * e1000_irq_disable - Mask off interrupt generation on the NIC
334 * @adapter: board private structure
338 e1000_irq_disable(struct e1000_adapter *adapter)
340 atomic_inc(&adapter->irq_sem);
341 E1000_WRITE_REG(&adapter->hw, IMC, ~0);
342 E1000_WRITE_FLUSH(&adapter->hw);
343 synchronize_irq(adapter->pdev->irq);
347 * e1000_irq_enable - Enable default interrupt generation settings
348 * @adapter: board private structure
352 e1000_irq_enable(struct e1000_adapter *adapter)
354 if (likely(atomic_dec_and_test(&adapter->irq_sem))) {
355 E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
356 E1000_WRITE_FLUSH(&adapter->hw);
361 e1000_update_mng_vlan(struct e1000_adapter *adapter)
363 struct net_device *netdev = adapter->netdev;
364 uint16_t vid = adapter->hw.mng_cookie.vlan_id;
365 uint16_t old_vid = adapter->mng_vlan_id;
366 if (adapter->vlgrp) {
367 if (!adapter->vlgrp->vlan_devices[vid]) {
368 if (adapter->hw.mng_cookie.status &
369 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) {
370 e1000_vlan_rx_add_vid(netdev, vid);
371 adapter->mng_vlan_id = vid;
373 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
375 if ((old_vid != (uint16_t)E1000_MNG_VLAN_NONE) &&
377 !adapter->vlgrp->vlan_devices[old_vid])
378 e1000_vlan_rx_kill_vid(netdev, old_vid);
380 adapter->mng_vlan_id = vid;
385 * e1000_release_hw_control - release control of the h/w to f/w
386 * @adapter: address of board private structure
388 * e1000_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit.
389 * For ASF and Pass Through versions of f/w this means that the
390 * driver is no longer loaded. For AMT version (only with 82573) i
391 * of the f/w this means that the netowrk i/f is closed.
396 e1000_release_hw_control(struct e1000_adapter *adapter)
401 /* Let firmware taken over control of h/w */
402 switch (adapter->hw.mac_type) {
405 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
406 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
407 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
410 swsm = E1000_READ_REG(&adapter->hw, SWSM);
411 E1000_WRITE_REG(&adapter->hw, SWSM,
412 swsm & ~E1000_SWSM_DRV_LOAD);
419 * e1000_get_hw_control - get control of the h/w from f/w
420 * @adapter: address of board private structure
422 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
423 * For ASF and Pass Through versions of f/w this means that
424 * the driver is loaded. For AMT version (only with 82573)
425 * of the f/w this means that the netowrk i/f is open.
430 e1000_get_hw_control(struct e1000_adapter *adapter)
434 /* Let firmware know the driver has taken over */
435 switch (adapter->hw.mac_type) {
438 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
439 E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
440 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
443 swsm = E1000_READ_REG(&adapter->hw, SWSM);
444 E1000_WRITE_REG(&adapter->hw, SWSM,
445 swsm | E1000_SWSM_DRV_LOAD);
453 e1000_up(struct e1000_adapter *adapter)
455 struct net_device *netdev = adapter->netdev;
458 /* hardware has been reset, we need to reload some things */
460 /* Reset the PHY if it was previously powered down */
461 if (adapter->hw.media_type == e1000_media_type_copper) {
463 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
464 if (mii_reg & MII_CR_POWER_DOWN)
465 e1000_phy_reset(&adapter->hw);
468 e1000_set_multi(netdev);
470 e1000_restore_vlan(adapter);
472 e1000_configure_tx(adapter);
473 e1000_setup_rctl(adapter);
474 e1000_configure_rx(adapter);
475 /* call E1000_DESC_UNUSED which always leaves
476 * at least 1 descriptor unused to make sure
477 * next_to_use != next_to_clean */
478 for (i = 0; i < adapter->num_rx_queues; i++) {
479 struct e1000_rx_ring *ring = &adapter->rx_ring[i];
480 adapter->alloc_rx_buf(adapter, ring,
481 E1000_DESC_UNUSED(ring));
484 #ifdef CONFIG_PCI_MSI
485 if (adapter->hw.mac_type > e1000_82547_rev_2) {
486 adapter->have_msi = TRUE;
487 if ((err = pci_enable_msi(adapter->pdev))) {
489 "Unable to allocate MSI interrupt Error: %d\n", err);
490 adapter->have_msi = FALSE;
494 if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
495 SA_SHIRQ | SA_SAMPLE_RANDOM,
496 netdev->name, netdev))) {
498 "Unable to allocate interrupt Error: %d\n", err);
502 adapter->tx_queue_len = netdev->tx_queue_len;
504 mod_timer(&adapter->watchdog_timer, jiffies);
506 #ifdef CONFIG_E1000_NAPI
507 netif_poll_enable(netdev);
509 e1000_irq_enable(adapter);
515 e1000_down(struct e1000_adapter *adapter)
517 struct net_device *netdev = adapter->netdev;
518 boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
519 e1000_check_mng_mode(&adapter->hw);
521 e1000_irq_disable(adapter);
523 free_irq(adapter->pdev->irq, netdev);
524 #ifdef CONFIG_PCI_MSI
525 if (adapter->hw.mac_type > e1000_82547_rev_2 &&
526 adapter->have_msi == TRUE)
527 pci_disable_msi(adapter->pdev);
529 del_timer_sync(&adapter->tx_fifo_stall_timer);
530 del_timer_sync(&adapter->watchdog_timer);
531 del_timer_sync(&adapter->phy_info_timer);
533 #ifdef CONFIG_E1000_NAPI
534 netif_poll_disable(netdev);
536 netdev->tx_queue_len = adapter->tx_queue_len;
537 adapter->link_speed = 0;
538 adapter->link_duplex = 0;
539 netif_carrier_off(netdev);
540 netif_stop_queue(netdev);
542 e1000_reset(adapter);
543 e1000_clean_all_tx_rings(adapter);
544 e1000_clean_all_rx_rings(adapter);
546 /* Power down the PHY so no link is implied when interface is down *
547 * The PHY cannot be powered down if any of the following is TRUE *
550 * (c) SoL/IDER session is active */
551 if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
552 adapter->hw.media_type == e1000_media_type_copper &&
553 !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
555 !e1000_check_phy_reset_block(&adapter->hw)) {
557 e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
558 mii_reg |= MII_CR_POWER_DOWN;
559 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
565 e1000_reset(struct e1000_adapter *adapter)
568 uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;
570 /* Repartition Pba for greater than 9k mtu
571 * To take effect CTRL.RST is required.
574 switch (adapter->hw.mac_type) {
576 case e1000_82547_rev_2:
581 case e1000_80003es2lan:
592 if ((adapter->hw.mac_type != e1000_82573) &&
593 (adapter->netdev->mtu > E1000_RXBUFFER_8192))
594 pba -= 8; /* allocate more FIFO for Tx */
597 if (adapter->hw.mac_type == e1000_82547) {
598 adapter->tx_fifo_head = 0;
599 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
600 adapter->tx_fifo_size =
601 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
602 atomic_set(&adapter->tx_fifo_stall, 0);
605 E1000_WRITE_REG(&adapter->hw, PBA, pba);
607 /* flow control settings */
608 /* Set the FC high water mark to 90% of the FIFO size.
609 * Required to clear last 3 LSB */
610 fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;
612 adapter->hw.fc_high_water = fc_high_water_mark;
613 adapter->hw.fc_low_water = fc_high_water_mark - 8;
614 if (adapter->hw.mac_type == e1000_80003es2lan)
615 adapter->hw.fc_pause_time = 0xFFFF;
617 adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
618 adapter->hw.fc_send_xon = 1;
619 adapter->hw.fc = adapter->hw.original_fc;
621 /* Allow time for pending master requests to run */
622 e1000_reset_hw(&adapter->hw);
623 if (adapter->hw.mac_type >= e1000_82544)
624 E1000_WRITE_REG(&adapter->hw, WUC, 0);
625 if (e1000_init_hw(&adapter->hw))
626 DPRINTK(PROBE, ERR, "Hardware Error\n");
627 e1000_update_mng_vlan(adapter);
628 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
629 E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);
631 e1000_reset_adaptive(&adapter->hw);
632 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
633 if (adapter->en_mng_pt) {
634 manc = E1000_READ_REG(&adapter->hw, MANC);
635 manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
636 E1000_WRITE_REG(&adapter->hw, MANC, manc);
641 * e1000_probe - Device Initialization Routine
642 * @pdev: PCI device information struct
643 * @ent: entry in e1000_pci_tbl
645 * Returns 0 on success, negative on failure
647 * e1000_probe initializes an adapter identified by a pci_dev structure.
648 * The OS initialization, configuring of the adapter private structure,
649 * and a hardware reset occur.
653 e1000_probe(struct pci_dev *pdev,
654 const struct pci_device_id *ent)
656 struct net_device *netdev;
657 struct e1000_adapter *adapter;
658 unsigned long mmio_start, mmio_len;
660 static int cards_found = 0;
661 static int e1000_ksp3_port_a = 0; /* global ksp3 port a indication */
662 int i, err, pci_using_dac;
663 uint16_t eeprom_data;
664 uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
665 if ((err = pci_enable_device(pdev)))
668 if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
671 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
672 E1000_ERR("No usable DMA configuration, aborting\n");
678 if ((err = pci_request_regions(pdev, e1000_driver_name)))
681 pci_set_master(pdev);
683 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
686 goto err_alloc_etherdev;
689 SET_MODULE_OWNER(netdev);
690 SET_NETDEV_DEV(netdev, &pdev->dev);
692 pci_set_drvdata(pdev, netdev);
693 adapter = netdev_priv(netdev);
694 adapter->netdev = netdev;
695 adapter->pdev = pdev;
696 adapter->hw.back = adapter;
697 adapter->msg_enable = (1 << debug) - 1;
699 mmio_start = pci_resource_start(pdev, BAR_0);
700 mmio_len = pci_resource_len(pdev, BAR_0);
702 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
703 if (!adapter->hw.hw_addr) {
708 for (i = BAR_1; i <= BAR_5; i++) {
709 if (pci_resource_len(pdev, i) == 0)
711 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
712 adapter->hw.io_base = pci_resource_start(pdev, i);
717 netdev->open = &e1000_open;
718 netdev->stop = &e1000_close;
719 netdev->hard_start_xmit = &e1000_xmit_frame;
720 netdev->get_stats = &e1000_get_stats;
721 netdev->set_multicast_list = &e1000_set_multi;
722 netdev->set_mac_address = &e1000_set_mac;
723 netdev->change_mtu = &e1000_change_mtu;
724 netdev->do_ioctl = &e1000_ioctl;
725 e1000_set_ethtool_ops(netdev);
726 netdev->tx_timeout = &e1000_tx_timeout;
727 netdev->watchdog_timeo = 5 * HZ;
728 #ifdef CONFIG_E1000_NAPI
729 netdev->poll = &e1000_clean;
732 netdev->vlan_rx_register = e1000_vlan_rx_register;
733 netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
734 netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
735 #ifdef CONFIG_NET_POLL_CONTROLLER
736 netdev->poll_controller = e1000_netpoll;
738 strcpy(netdev->name, pci_name(pdev));
740 netdev->mem_start = mmio_start;
741 netdev->mem_end = mmio_start + mmio_len;
742 netdev->base_addr = adapter->hw.io_base;
744 adapter->bd_number = cards_found;
746 /* setup the private structure */
748 if ((err = e1000_sw_init(adapter)))
751 if ((err = e1000_check_phy_reset_block(&adapter->hw)))
752 DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");
754 /* if ksp3, indicate if it's port a being setup */
755 if (pdev->device == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3 &&
756 e1000_ksp3_port_a == 0)
757 adapter->ksp3_port_a = 1;
759 /* Reset for multiple KP3 adapters */
760 if (e1000_ksp3_port_a == 4)
761 e1000_ksp3_port_a = 0;
763 if (adapter->hw.mac_type >= e1000_82543) {
764 netdev->features = NETIF_F_SG |
768 NETIF_F_HW_VLAN_FILTER;
772 if ((adapter->hw.mac_type >= e1000_82544) &&
773 (adapter->hw.mac_type != e1000_82547))
774 netdev->features |= NETIF_F_TSO;
776 #ifdef NETIF_F_TSO_IPV6
777 if (adapter->hw.mac_type > e1000_82547_rev_2)
778 netdev->features |= NETIF_F_TSO_IPV6;
782 netdev->features |= NETIF_F_HIGHDMA;
784 /* hard_start_xmit is safe against parallel locking */
785 netdev->features |= NETIF_F_LLTX;
787 adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);
789 /* before reading the EEPROM, reset the controller to
790 * put the device in a known good starting state */
792 e1000_reset_hw(&adapter->hw);
794 /* make sure the EEPROM is good */
796 if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
797 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
802 /* copy the MAC address out of the EEPROM */
804 if (e1000_read_mac_addr(&adapter->hw))
805 DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
806 memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
807 memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);
809 if (!is_valid_ether_addr(netdev->perm_addr)) {
810 DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
815 e1000_read_part_num(&adapter->hw, &(adapter->part_num));
817 e1000_get_bus_info(&adapter->hw);
819 init_timer(&adapter->tx_fifo_stall_timer);
820 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
821 adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;
823 init_timer(&adapter->watchdog_timer);
824 adapter->watchdog_timer.function = &e1000_watchdog;
825 adapter->watchdog_timer.data = (unsigned long) adapter;
827 INIT_WORK(&adapter->watchdog_task,
828 (void (*)(void *))e1000_watchdog_task, adapter);
830 init_timer(&adapter->phy_info_timer);
831 adapter->phy_info_timer.function = &e1000_update_phy_info;
832 adapter->phy_info_timer.data = (unsigned long) adapter;
834 INIT_WORK(&adapter->reset_task,
835 (void (*)(void *))e1000_reset_task, netdev);
837 /* we're going to reset, so assume we have no link for now */
839 netif_carrier_off(netdev);
840 netif_stop_queue(netdev);
842 e1000_check_options(adapter);
844 /* Initial Wake on LAN setting
845 * If APM wake is enabled in the EEPROM,
846 * enable the ACPI Magic Packet filter
849 switch (adapter->hw.mac_type) {
850 case e1000_82542_rev2_0:
851 case e1000_82542_rev2_1:
855 e1000_read_eeprom(&adapter->hw,
856 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
857 eeprom_apme_mask = E1000_EEPROM_82544_APM;
860 case e1000_82546_rev_3:
862 case e1000_80003es2lan:
863 if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
864 e1000_read_eeprom(&adapter->hw,
865 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
870 e1000_read_eeprom(&adapter->hw,
871 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
874 if (eeprom_data & eeprom_apme_mask)
875 adapter->wol |= E1000_WUFC_MAG;
877 /* print bus type/speed/width info */
879 struct e1000_hw *hw = &adapter->hw;
880 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
881 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
882 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
883 ((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
884 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
885 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
886 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
887 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
888 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
889 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
890 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
894 for (i = 0; i < 6; i++)
895 printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');
897 /* reset the hardware with the new settings */
898 e1000_reset(adapter);
900 /* If the controller is 82573 and f/w is AMT, do not set
901 * DRV_LOAD until the interface is up. For all other cases,
902 * let the f/w know that the h/w is now under the control
904 if (adapter->hw.mac_type != e1000_82573 ||
905 !e1000_check_mng_mode(&adapter->hw))
906 e1000_get_hw_control(adapter);
908 strcpy(netdev->name, "eth%d");
909 if ((err = register_netdev(netdev)))
912 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");
920 iounmap(adapter->hw.hw_addr);
924 pci_release_regions(pdev);
929 * e1000_remove - Device Removal Routine
930 * @pdev: PCI device information struct
932 * e1000_remove is called by the PCI subsystem to alert the driver
933 * that it should release a PCI device. The could be caused by a
934 * Hot-Plug event, or because the driver is going to be removed from
938 static void __devexit
939 e1000_remove(struct pci_dev *pdev)
941 struct net_device *netdev = pci_get_drvdata(pdev);
942 struct e1000_adapter *adapter = netdev_priv(netdev);
944 #ifdef CONFIG_E1000_NAPI
948 flush_scheduled_work();
950 if (adapter->hw.mac_type >= e1000_82540 &&
951 adapter->hw.media_type == e1000_media_type_copper) {
952 manc = E1000_READ_REG(&adapter->hw, MANC);
953 if (manc & E1000_MANC_SMBUS_EN) {
954 manc |= E1000_MANC_ARP_EN;
955 E1000_WRITE_REG(&adapter->hw, MANC, manc);
959 /* Release control of h/w to f/w. If f/w is AMT enabled, this
960 * would have already happened in close and is redundant. */
961 e1000_release_hw_control(adapter);
963 unregister_netdev(netdev);
964 #ifdef CONFIG_E1000_NAPI
965 for (i = 0; i < adapter->num_rx_queues; i++)
966 __dev_put(&adapter->polling_netdev[i]);
969 if (!e1000_check_phy_reset_block(&adapter->hw))
970 e1000_phy_hw_reset(&adapter->hw);
972 kfree(adapter->tx_ring);
973 kfree(adapter->rx_ring);
974 #ifdef CONFIG_E1000_NAPI
975 kfree(adapter->polling_netdev);
978 iounmap(adapter->hw.hw_addr);
979 pci_release_regions(pdev);
983 pci_disable_device(pdev);
987 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
988 * @adapter: board private structure to initialize
990 * e1000_sw_init initializes the Adapter private data structure.
991 * Fields are initialized based on PCI device information and
992 * OS network device settings (MTU size).
996 e1000_sw_init(struct e1000_adapter *adapter)
998 struct e1000_hw *hw = &adapter->hw;
999 struct net_device *netdev = adapter->netdev;
1000 struct pci_dev *pdev = adapter->pdev;
1001 #ifdef CONFIG_E1000_NAPI
1005 /* PCI config space info */
1007 hw->vendor_id = pdev->vendor;
1008 hw->device_id = pdev->device;
1009 hw->subsystem_vendor_id = pdev->subsystem_vendor;
1010 hw->subsystem_id = pdev->subsystem_device;
1012 pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
1014 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
1016 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
1017 adapter->rx_ps_bsize0 = E1000_RXBUFFER_256;
1018 hw->max_frame_size = netdev->mtu +
1019 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
1020 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;
1022 /* identify the MAC */
1024 if (e1000_set_mac_type(hw)) {
1025 DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
1029 /* initialize eeprom parameters */
1031 if (e1000_init_eeprom_params(hw)) {
1032 E1000_ERR("EEPROM initialization failed\n");
1036 switch (hw->mac_type) {
1041 case e1000_82541_rev_2:
1042 case e1000_82547_rev_2:
1043 hw->phy_init_script = 1;
1047 e1000_set_media_type(hw);
1049 hw->wait_autoneg_complete = FALSE;
1050 hw->tbi_compatibility_en = TRUE;
1051 hw->adaptive_ifs = TRUE;
1053 /* Copper options */
1055 if (hw->media_type == e1000_media_type_copper) {
1056 hw->mdix = AUTO_ALL_MODES;
1057 hw->disable_polarity_correction = FALSE;
1058 hw->master_slave = E1000_MASTER_SLAVE;
1061 adapter->num_tx_queues = 1;
1062 adapter->num_rx_queues = 1;
1064 if (e1000_alloc_queues(adapter)) {
1065 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
1069 #ifdef CONFIG_E1000_NAPI
1070 for (i = 0; i < adapter->num_rx_queues; i++) {
1071 adapter->polling_netdev[i].priv = adapter;
1072 adapter->polling_netdev[i].poll = &e1000_clean;
1073 adapter->polling_netdev[i].weight = 64;
1074 dev_hold(&adapter->polling_netdev[i]);
1075 set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
1077 spin_lock_init(&adapter->tx_queue_lock);
1080 atomic_set(&adapter->irq_sem, 1);
1081 spin_lock_init(&adapter->stats_lock);
1087 * e1000_alloc_queues - Allocate memory for all rings
1088 * @adapter: board private structure to initialize
1090 * We allocate one ring per queue at run-time since we don't know the
1091 * number of queues at compile-time. The polling_netdev array is
1092 * intended for Multiqueue, but should work fine with a single queue.
1095 static int __devinit
1096 e1000_alloc_queues(struct e1000_adapter *adapter)
1100 size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
1101 adapter->tx_ring = kmalloc(size, GFP_KERNEL);
1102 if (!adapter->tx_ring)
1104 memset(adapter->tx_ring, 0, size);
1106 size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
1107 adapter->rx_ring = kmalloc(size, GFP_KERNEL);
1108 if (!adapter->rx_ring) {
1109 kfree(adapter->tx_ring);
1112 memset(adapter->rx_ring, 0, size);
1114 #ifdef CONFIG_E1000_NAPI
1115 size = sizeof(struct net_device) * adapter->num_rx_queues;
1116 adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
1117 if (!adapter->polling_netdev) {
1118 kfree(adapter->tx_ring);
1119 kfree(adapter->rx_ring);
1122 memset(adapter->polling_netdev, 0, size);
1125 return E1000_SUCCESS;
1129 * e1000_open - Called when a network interface is made active
1130 * @netdev: network interface device structure
1132 * Returns 0 on success, negative value on failure
1134 * The open entry point is called when a network interface is made
1135 * active by the system (IFF_UP). At this point all resources needed
1136 * for transmit and receive operations are allocated, the interrupt
1137 * handler is registered with the OS, the watchdog timer is started,
1138 * and the stack is notified that the interface is ready.
1142 e1000_open(struct net_device *netdev)
1144 struct e1000_adapter *adapter = netdev_priv(netdev);
1147 /* allocate transmit descriptors */
1149 if ((err = e1000_setup_all_tx_resources(adapter)))
1152 /* allocate receive descriptors */
1154 if ((err = e1000_setup_all_rx_resources(adapter)))
1157 if ((err = e1000_up(adapter)))
1159 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1160 if ((adapter->hw.mng_cookie.status &
1161 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1162 e1000_update_mng_vlan(adapter);
1165 /* If AMT is enabled, let the firmware know that the network
1166 * interface is now open */
1167 if (adapter->hw.mac_type == e1000_82573 &&
1168 e1000_check_mng_mode(&adapter->hw))
1169 e1000_get_hw_control(adapter);
1171 return E1000_SUCCESS;
1174 e1000_free_all_rx_resources(adapter);
1176 e1000_free_all_tx_resources(adapter);
1178 e1000_reset(adapter);
1184 * e1000_close - Disables a network interface
1185 * @netdev: network interface device structure
1187 * Returns 0, this is not allowed to fail
1189 * The close entry point is called when an interface is de-activated
1190 * by the OS. The hardware is still under the drivers control, but
1191 * needs to be disabled. A global MAC reset is issued to stop the
1192 * hardware, and all transmit and receive resources are freed.
1196 e1000_close(struct net_device *netdev)
1198 struct e1000_adapter *adapter = netdev_priv(netdev);
1200 e1000_down(adapter);
1202 e1000_free_all_tx_resources(adapter);
1203 e1000_free_all_rx_resources(adapter);
1205 if ((adapter->hw.mng_cookie.status &
1206 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
1207 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
1210 /* If AMT is enabled, let the firmware know that the network
1211 * interface is now closed */
1212 if (adapter->hw.mac_type == e1000_82573 &&
1213 e1000_check_mng_mode(&adapter->hw))
1214 e1000_release_hw_control(adapter);
1220 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1221 * @adapter: address of board private structure
1222 * @start: address of beginning of memory
1223 * @len: length of memory
1225 static inline boolean_t
1226 e1000_check_64k_bound(struct e1000_adapter *adapter,
1227 void *start, unsigned long len)
1229 unsigned long begin = (unsigned long) start;
1230 unsigned long end = begin + len;
1232 /* First rev 82545 and 82546 need to not allow any memory
1233 * write location to cross 64k boundary due to errata 23 */
1234 if (adapter->hw.mac_type == e1000_82545 ||
1235 adapter->hw.mac_type == e1000_82546) {
1236 return ((begin ^ (end - 1)) >> 16) != 0 ? FALSE : TRUE;
1243 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1244 * @adapter: board private structure
1245 * @txdr: tx descriptor ring (for a specific queue) to setup
1247 * Return 0 on success, negative on failure
1251 e1000_setup_tx_resources(struct e1000_adapter *adapter,
1252 struct e1000_tx_ring *txdr)
1254 struct pci_dev *pdev = adapter->pdev;
1257 size = sizeof(struct e1000_buffer) * txdr->count;
1259 txdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1260 if (!txdr->buffer_info) {
1262 "Unable to allocate memory for the transmit descriptor ring\n");
1265 memset(txdr->buffer_info, 0, size);
1267 /* round up to nearest 4K */
1269 txdr->size = txdr->count * sizeof(struct e1000_tx_desc);
1270 E1000_ROUNDUP(txdr->size, 4096);
1272 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1275 vfree(txdr->buffer_info);
1277 "Unable to allocate memory for the transmit descriptor ring\n");
1281 /* Fix for errata 23, can't cross 64kB boundary */
1282 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1283 void *olddesc = txdr->desc;
1284 dma_addr_t olddma = txdr->dma;
1285 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes "
1286 "at %p\n", txdr->size, txdr->desc);
1287 /* Try again, without freeing the previous */
1288 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
1289 /* Failed allocation, critical failure */
1291 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1292 goto setup_tx_desc_die;
1295 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) {
1297 pci_free_consistent(pdev, txdr->size, txdr->desc,
1299 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1301 "Unable to allocate aligned memory "
1302 "for the transmit descriptor ring\n");
1303 vfree(txdr->buffer_info);
1306 /* Free old allocation, new allocation was successful */
1307 pci_free_consistent(pdev, txdr->size, olddesc, olddma);
1310 memset(txdr->desc, 0, txdr->size);
1312 txdr->next_to_use = 0;
1313 txdr->next_to_clean = 0;
1314 spin_lock_init(&txdr->tx_lock);
1320 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1321 * (Descriptors) for all queues
1322 * @adapter: board private structure
1324 * If this function returns with an error, then it's possible one or
1325 * more of the rings is populated (while the rest are not). It is the
1326 * callers duty to clean those orphaned rings.
1328 * Return 0 on success, negative on failure
1332 e1000_setup_all_tx_resources(struct e1000_adapter *adapter)
1336 for (i = 0; i < adapter->num_tx_queues; i++) {
1337 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]);
1340 "Allocation for Tx Queue %u failed\n", i);
1349 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1350 * @adapter: board private structure
1352 * Configure the Tx unit of the MAC after a reset.
1356 e1000_configure_tx(struct e1000_adapter *adapter)
1359 struct e1000_hw *hw = &adapter->hw;
1360 uint32_t tdlen, tctl, tipg, tarc;
1361 uint32_t ipgr1, ipgr2;
1363 /* Setup the HW Tx Head and Tail descriptor pointers */
1365 switch (adapter->num_tx_queues) {
1368 tdba = adapter->tx_ring[0].dma;
1369 tdlen = adapter->tx_ring[0].count *
1370 sizeof(struct e1000_tx_desc);
1371 E1000_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
1372 E1000_WRITE_REG(hw, TDBAH, (tdba >> 32));
1373 E1000_WRITE_REG(hw, TDLEN, tdlen);
1374 E1000_WRITE_REG(hw, TDH, 0);
1375 E1000_WRITE_REG(hw, TDT, 0);
1376 adapter->tx_ring[0].tdh = E1000_TDH;
1377 adapter->tx_ring[0].tdt = E1000_TDT;
1381 /* Set the default values for the Tx Inter Packet Gap timer */
1383 if (hw->media_type == e1000_media_type_fiber ||
1384 hw->media_type == e1000_media_type_internal_serdes)
1385 tipg = DEFAULT_82543_TIPG_IPGT_FIBER;
1387 tipg = DEFAULT_82543_TIPG_IPGT_COPPER;
1389 switch (hw->mac_type) {
1390 case e1000_82542_rev2_0:
1391 case e1000_82542_rev2_1:
1392 tipg = DEFAULT_82542_TIPG_IPGT;
1393 ipgr1 = DEFAULT_82542_TIPG_IPGR1;
1394 ipgr2 = DEFAULT_82542_TIPG_IPGR2;
1396 case e1000_80003es2lan:
1397 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1398 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
1401 ipgr1 = DEFAULT_82543_TIPG_IPGR1;
1402 ipgr2 = DEFAULT_82543_TIPG_IPGR2;
1405 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1406 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1407 E1000_WRITE_REG(hw, TIPG, tipg);
1409 /* Set the Tx Interrupt Delay register */
1411 E1000_WRITE_REG(hw, TIDV, adapter->tx_int_delay);
1412 if (hw->mac_type >= e1000_82540)
1413 E1000_WRITE_REG(hw, TADV, adapter->tx_abs_int_delay);
1415 /* Program the Transmit Control Register */
1417 tctl = E1000_READ_REG(hw, TCTL);
1419 tctl &= ~E1000_TCTL_CT;
1420 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1421 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1424 /* disable Multiple Reads for debugging */
1425 tctl &= ~E1000_TCTL_MULR;
1428 if (hw->mac_type == e1000_82571 || hw->mac_type == e1000_82572) {
1429 tarc = E1000_READ_REG(hw, TARC0);
1430 tarc |= ((1 << 25) | (1 << 21));
1431 E1000_WRITE_REG(hw, TARC0, tarc);
1432 tarc = E1000_READ_REG(hw, TARC1);
1434 if (tctl & E1000_TCTL_MULR)
1438 E1000_WRITE_REG(hw, TARC1, tarc);
1439 } else if (hw->mac_type == e1000_80003es2lan) {
1440 tarc = E1000_READ_REG(hw, TARC0);
1442 if (hw->media_type == e1000_media_type_internal_serdes)
1444 E1000_WRITE_REG(hw, TARC0, tarc);
1445 tarc = E1000_READ_REG(hw, TARC1);
1447 E1000_WRITE_REG(hw, TARC1, tarc);
1450 e1000_config_collision_dist(hw);
1452 /* Setup Transmit Descriptor Settings for eop descriptor */
1453 adapter->txd_cmd = E1000_TXD_CMD_IDE | E1000_TXD_CMD_EOP |
1456 if (hw->mac_type < e1000_82543)
1457 adapter->txd_cmd |= E1000_TXD_CMD_RPS;
1459 adapter->txd_cmd |= E1000_TXD_CMD_RS;
1461 /* Cache if we're 82544 running in PCI-X because we'll
1462 * need this to apply a workaround later in the send path. */
1463 if (hw->mac_type == e1000_82544 &&
1464 hw->bus_type == e1000_bus_type_pcix)
1465 adapter->pcix_82544 = 1;
1467 E1000_WRITE_REG(hw, TCTL, tctl);
1472 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1473 * @adapter: board private structure
1474 * @rxdr: rx descriptor ring (for a specific queue) to setup
1476 * Returns 0 on success, negative on failure
1480 e1000_setup_rx_resources(struct e1000_adapter *adapter,
1481 struct e1000_rx_ring *rxdr)
1483 struct pci_dev *pdev = adapter->pdev;
1486 size = sizeof(struct e1000_buffer) * rxdr->count;
1487 rxdr->buffer_info = vmalloc_node(size, pcibus_to_node(pdev->bus));
1488 if (!rxdr->buffer_info) {
1490 "Unable to allocate memory for the receive descriptor ring\n");
1493 memset(rxdr->buffer_info, 0, size);
1495 size = sizeof(struct e1000_ps_page) * rxdr->count;
1496 rxdr->ps_page = kmalloc(size, GFP_KERNEL);
1497 if (!rxdr->ps_page) {
1498 vfree(rxdr->buffer_info);
1500 "Unable to allocate memory for the receive descriptor ring\n");
1503 memset(rxdr->ps_page, 0, size);
1505 size = sizeof(struct e1000_ps_page_dma) * rxdr->count;
1506 rxdr->ps_page_dma = kmalloc(size, GFP_KERNEL);
1507 if (!rxdr->ps_page_dma) {
1508 vfree(rxdr->buffer_info);
1509 kfree(rxdr->ps_page);
1511 "Unable to allocate memory for the receive descriptor ring\n");
1514 memset(rxdr->ps_page_dma, 0, size);
1516 if (adapter->hw.mac_type <= e1000_82547_rev_2)
1517 desc_len = sizeof(struct e1000_rx_desc);
1519 desc_len = sizeof(union e1000_rx_desc_packet_split);
1521 /* Round up to nearest 4K */
1523 rxdr->size = rxdr->count * desc_len;
1524 E1000_ROUNDUP(rxdr->size, 4096);
1526 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1530 "Unable to allocate memory for the receive descriptor ring\n");
1532 vfree(rxdr->buffer_info);
1533 kfree(rxdr->ps_page);
1534 kfree(rxdr->ps_page_dma);
1538 /* Fix for errata 23, can't cross 64kB boundary */
1539 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1540 void *olddesc = rxdr->desc;
1541 dma_addr_t olddma = rxdr->dma;
1542 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes "
1543 "at %p\n", rxdr->size, rxdr->desc);
1544 /* Try again, without freeing the previous */
1545 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
1546 /* Failed allocation, critical failure */
1548 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1550 "Unable to allocate memory "
1551 "for the receive descriptor ring\n");
1552 goto setup_rx_desc_die;
1555 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) {
1557 pci_free_consistent(pdev, rxdr->size, rxdr->desc,
1559 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1561 "Unable to allocate aligned memory "
1562 "for the receive descriptor ring\n");
1563 goto setup_rx_desc_die;
1565 /* Free old allocation, new allocation was successful */
1566 pci_free_consistent(pdev, rxdr->size, olddesc, olddma);
1569 memset(rxdr->desc, 0, rxdr->size);
1571 rxdr->next_to_clean = 0;
1572 rxdr->next_to_use = 0;
1578 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1579 * (Descriptors) for all queues
1580 * @adapter: board private structure
1582 * If this function returns with an error, then it's possible one or
1583 * more of the rings is populated (while the rest are not). It is the
1584 * callers duty to clean those orphaned rings.
1586 * Return 0 on success, negative on failure
1590 e1000_setup_all_rx_resources(struct e1000_adapter *adapter)
1594 for (i = 0; i < adapter->num_rx_queues; i++) {
1595 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]);
1598 "Allocation for Rx Queue %u failed\n", i);
1607 * e1000_setup_rctl - configure the receive control registers
1608 * @adapter: Board private structure
1610 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1611 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1613 e1000_setup_rctl(struct e1000_adapter *adapter)
1615 uint32_t rctl, rfctl;
1616 uint32_t psrctl = 0;
1617 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1621 rctl = E1000_READ_REG(&adapter->hw, RCTL);
1623 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1625 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1626 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1627 (adapter->hw.mc_filter_type << E1000_RCTL_MO_SHIFT);
1629 if (adapter->hw.mac_type > e1000_82543)
1630 rctl |= E1000_RCTL_SECRC;
1632 if (adapter->hw.tbi_compatibility_on == 1)
1633 rctl |= E1000_RCTL_SBP;
1635 rctl &= ~E1000_RCTL_SBP;
1637 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1638 rctl &= ~E1000_RCTL_LPE;
1640 rctl |= E1000_RCTL_LPE;
1642 /* Setup buffer sizes */
1643 if (adapter->hw.mac_type >= e1000_82571) {
1644 /* We can now specify buffers in 1K increments.
1645 * BSIZE and BSEX are ignored in this case. */
1646 rctl |= adapter->rx_buffer_len << 0x11;
1648 rctl &= ~E1000_RCTL_SZ_4096;
1649 rctl |= E1000_RCTL_BSEX;
1650 switch (adapter->rx_buffer_len) {
1651 case E1000_RXBUFFER_2048:
1653 rctl |= E1000_RCTL_SZ_2048;
1654 rctl &= ~E1000_RCTL_BSEX;
1656 case E1000_RXBUFFER_4096:
1657 rctl |= E1000_RCTL_SZ_4096;
1659 case E1000_RXBUFFER_8192:
1660 rctl |= E1000_RCTL_SZ_8192;
1662 case E1000_RXBUFFER_16384:
1663 rctl |= E1000_RCTL_SZ_16384;
1668 #ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
1669 /* 82571 and greater support packet-split where the protocol
1670 * header is placed in skb->data and the packet data is
1671 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1672 * In the case of a non-split, skb->data is linearly filled,
1673 * followed by the page buffers. Therefore, skb->data is
1674 * sized to hold the largest protocol header.
1676 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1677 if ((adapter->hw.mac_type > e1000_82547_rev_2) && (pages <= 3) &&
1679 adapter->rx_ps_pages = pages;
1681 adapter->rx_ps_pages = 0;
1683 if (adapter->rx_ps_pages) {
1684 /* Configure extra packet-split registers */
1685 rfctl = E1000_READ_REG(&adapter->hw, RFCTL);
1686 rfctl |= E1000_RFCTL_EXTEN;
1687 /* disable IPv6 packet split support */
1688 rfctl |= E1000_RFCTL_IPV6_DIS;
1689 E1000_WRITE_REG(&adapter->hw, RFCTL, rfctl);
1691 rctl |= E1000_RCTL_DTYP_PS | E1000_RCTL_SECRC;
1693 psrctl |= adapter->rx_ps_bsize0 >>
1694 E1000_PSRCTL_BSIZE0_SHIFT;
1696 switch (adapter->rx_ps_pages) {
1698 psrctl |= PAGE_SIZE <<
1699 E1000_PSRCTL_BSIZE3_SHIFT;
1701 psrctl |= PAGE_SIZE <<
1702 E1000_PSRCTL_BSIZE2_SHIFT;
1704 psrctl |= PAGE_SIZE >>
1705 E1000_PSRCTL_BSIZE1_SHIFT;
1709 E1000_WRITE_REG(&adapter->hw, PSRCTL, psrctl);
1712 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
1716 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1717 * @adapter: board private structure
1719 * Configure the Rx unit of the MAC after a reset.
1723 e1000_configure_rx(struct e1000_adapter *adapter)
1726 struct e1000_hw *hw = &adapter->hw;
1727 uint32_t rdlen, rctl, rxcsum, ctrl_ext;
1729 if (adapter->rx_ps_pages) {
1730 rdlen = adapter->rx_ring[0].count *
1731 sizeof(union e1000_rx_desc_packet_split);
1732 adapter->clean_rx = e1000_clean_rx_irq_ps;
1733 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1735 rdlen = adapter->rx_ring[0].count *
1736 sizeof(struct e1000_rx_desc);
1737 adapter->clean_rx = e1000_clean_rx_irq;
1738 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1741 /* disable receives while setting up the descriptors */
1742 rctl = E1000_READ_REG(hw, RCTL);
1743 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
1745 /* set the Receive Delay Timer Register */
1746 E1000_WRITE_REG(hw, RDTR, adapter->rx_int_delay);
1748 if (hw->mac_type >= e1000_82540) {
1749 E1000_WRITE_REG(hw, RADV, adapter->rx_abs_int_delay);
1750 if (adapter->itr > 1)
1751 E1000_WRITE_REG(hw, ITR,
1752 1000000000 / (adapter->itr * 256));
1755 if (hw->mac_type >= e1000_82571) {
1756 ctrl_ext = E1000_READ_REG(hw, CTRL_EXT);
1757 /* Reset delay timers after every interrupt */
1758 ctrl_ext |= E1000_CTRL_EXT_CANC;
1759 #ifdef CONFIG_E1000_NAPI
1760 /* Auto-Mask interrupts upon ICR read. */
1761 ctrl_ext |= E1000_CTRL_EXT_IAME;
1763 E1000_WRITE_REG(hw, CTRL_EXT, ctrl_ext);
1764 E1000_WRITE_REG(hw, IAM, ~0);
1765 E1000_WRITE_FLUSH(hw);
1768 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1769 * the Base and Length of the Rx Descriptor Ring */
1770 switch (adapter->num_rx_queues) {
1773 rdba = adapter->rx_ring[0].dma;
1774 E1000_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
1775 E1000_WRITE_REG(hw, RDBAH, (rdba >> 32));
1776 E1000_WRITE_REG(hw, RDLEN, rdlen);
1777 E1000_WRITE_REG(hw, RDH, 0);
1778 E1000_WRITE_REG(hw, RDT, 0);
1779 adapter->rx_ring[0].rdh = E1000_RDH;
1780 adapter->rx_ring[0].rdt = E1000_RDT;
1784 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1785 if (hw->mac_type >= e1000_82543) {
1786 rxcsum = E1000_READ_REG(hw, RXCSUM);
1787 if (adapter->rx_csum == TRUE) {
1788 rxcsum |= E1000_RXCSUM_TUOFL;
1790 /* Enable 82571 IPv4 payload checksum for UDP fragments
1791 * Must be used in conjunction with packet-split. */
1792 if ((hw->mac_type >= e1000_82571) &&
1793 (adapter->rx_ps_pages)) {
1794 rxcsum |= E1000_RXCSUM_IPPCSE;
1797 rxcsum &= ~E1000_RXCSUM_TUOFL;
1798 /* don't need to clear IPPCSE as it defaults to 0 */
1800 E1000_WRITE_REG(hw, RXCSUM, rxcsum);
1803 if (hw->mac_type == e1000_82573)
1804 E1000_WRITE_REG(hw, ERT, 0x0100);
1806 /* Enable Receives */
1807 E1000_WRITE_REG(hw, RCTL, rctl);
1811 * e1000_free_tx_resources - Free Tx Resources per Queue
1812 * @adapter: board private structure
1813 * @tx_ring: Tx descriptor ring for a specific queue
1815 * Free all transmit software resources
1819 e1000_free_tx_resources(struct e1000_adapter *adapter,
1820 struct e1000_tx_ring *tx_ring)
1822 struct pci_dev *pdev = adapter->pdev;
1824 e1000_clean_tx_ring(adapter, tx_ring);
1826 vfree(tx_ring->buffer_info);
1827 tx_ring->buffer_info = NULL;
1829 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1831 tx_ring->desc = NULL;
1835 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1836 * @adapter: board private structure
1838 * Free all transmit software resources
1842 e1000_free_all_tx_resources(struct e1000_adapter *adapter)
1846 for (i = 0; i < adapter->num_tx_queues; i++)
1847 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]);
1851 e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter,
1852 struct e1000_buffer *buffer_info)
1854 if (buffer_info->dma) {
1855 pci_unmap_page(adapter->pdev,
1857 buffer_info->length,
1860 if (buffer_info->skb)
1861 dev_kfree_skb_any(buffer_info->skb);
1862 memset(buffer_info, 0, sizeof(struct e1000_buffer));
1866 * e1000_clean_tx_ring - Free Tx Buffers
1867 * @adapter: board private structure
1868 * @tx_ring: ring to be cleaned
1872 e1000_clean_tx_ring(struct e1000_adapter *adapter,
1873 struct e1000_tx_ring *tx_ring)
1875 struct e1000_buffer *buffer_info;
1879 /* Free all the Tx ring sk_buffs */
1881 for (i = 0; i < tx_ring->count; i++) {
1882 buffer_info = &tx_ring->buffer_info[i];
1883 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
1886 size = sizeof(struct e1000_buffer) * tx_ring->count;
1887 memset(tx_ring->buffer_info, 0, size);
1889 /* Zero out the descriptor ring */
1891 memset(tx_ring->desc, 0, tx_ring->size);
1893 tx_ring->next_to_use = 0;
1894 tx_ring->next_to_clean = 0;
1895 tx_ring->last_tx_tso = 0;
1897 writel(0, adapter->hw.hw_addr + tx_ring->tdh);
1898 writel(0, adapter->hw.hw_addr + tx_ring->tdt);
1902 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1903 * @adapter: board private structure
1907 e1000_clean_all_tx_rings(struct e1000_adapter *adapter)
1911 for (i = 0; i < adapter->num_tx_queues; i++)
1912 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1916 * e1000_free_rx_resources - Free Rx Resources
1917 * @adapter: board private structure
1918 * @rx_ring: ring to clean the resources from
1920 * Free all receive software resources
1924 e1000_free_rx_resources(struct e1000_adapter *adapter,
1925 struct e1000_rx_ring *rx_ring)
1927 struct pci_dev *pdev = adapter->pdev;
1929 e1000_clean_rx_ring(adapter, rx_ring);
1931 vfree(rx_ring->buffer_info);
1932 rx_ring->buffer_info = NULL;
1933 kfree(rx_ring->ps_page);
1934 rx_ring->ps_page = NULL;
1935 kfree(rx_ring->ps_page_dma);
1936 rx_ring->ps_page_dma = NULL;
1938 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1940 rx_ring->desc = NULL;
1944 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1945 * @adapter: board private structure
1947 * Free all receive software resources
1951 e1000_free_all_rx_resources(struct e1000_adapter *adapter)
1955 for (i = 0; i < adapter->num_rx_queues; i++)
1956 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]);
1960 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1961 * @adapter: board private structure
1962 * @rx_ring: ring to free buffers from
1966 e1000_clean_rx_ring(struct e1000_adapter *adapter,
1967 struct e1000_rx_ring *rx_ring)
1969 struct e1000_buffer *buffer_info;
1970 struct e1000_ps_page *ps_page;
1971 struct e1000_ps_page_dma *ps_page_dma;
1972 struct pci_dev *pdev = adapter->pdev;
1976 /* Free all the Rx ring sk_buffs */
1977 for (i = 0; i < rx_ring->count; i++) {
1978 buffer_info = &rx_ring->buffer_info[i];
1979 if (buffer_info->skb) {
1980 pci_unmap_single(pdev,
1982 buffer_info->length,
1983 PCI_DMA_FROMDEVICE);
1985 dev_kfree_skb(buffer_info->skb);
1986 buffer_info->skb = NULL;
1988 ps_page = &rx_ring->ps_page[i];
1989 ps_page_dma = &rx_ring->ps_page_dma[i];
1990 for (j = 0; j < adapter->rx_ps_pages; j++) {
1991 if (!ps_page->ps_page[j]) break;
1992 pci_unmap_page(pdev,
1993 ps_page_dma->ps_page_dma[j],
1994 PAGE_SIZE, PCI_DMA_FROMDEVICE);
1995 ps_page_dma->ps_page_dma[j] = 0;
1996 put_page(ps_page->ps_page[j]);
1997 ps_page->ps_page[j] = NULL;
2001 size = sizeof(struct e1000_buffer) * rx_ring->count;
2002 memset(rx_ring->buffer_info, 0, size);
2003 size = sizeof(struct e1000_ps_page) * rx_ring->count;
2004 memset(rx_ring->ps_page, 0, size);
2005 size = sizeof(struct e1000_ps_page_dma) * rx_ring->count;
2006 memset(rx_ring->ps_page_dma, 0, size);
2008 /* Zero out the descriptor ring */
2010 memset(rx_ring->desc, 0, rx_ring->size);
2012 rx_ring->next_to_clean = 0;
2013 rx_ring->next_to_use = 0;
2015 writel(0, adapter->hw.hw_addr + rx_ring->rdh);
2016 writel(0, adapter->hw.hw_addr + rx_ring->rdt);
2020 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2021 * @adapter: board private structure
2025 e1000_clean_all_rx_rings(struct e1000_adapter *adapter)
2029 for (i = 0; i < adapter->num_rx_queues; i++)
2030 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2033 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2034 * and memory write and invalidate disabled for certain operations
2037 e1000_enter_82542_rst(struct e1000_adapter *adapter)
2039 struct net_device *netdev = adapter->netdev;
2042 e1000_pci_clear_mwi(&adapter->hw);
2044 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2045 rctl |= E1000_RCTL_RST;
2046 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2047 E1000_WRITE_FLUSH(&adapter->hw);
2050 if (netif_running(netdev))
2051 e1000_clean_all_rx_rings(adapter);
2055 e1000_leave_82542_rst(struct e1000_adapter *adapter)
2057 struct net_device *netdev = adapter->netdev;
2060 rctl = E1000_READ_REG(&adapter->hw, RCTL);
2061 rctl &= ~E1000_RCTL_RST;
2062 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
2063 E1000_WRITE_FLUSH(&adapter->hw);
2066 if (adapter->hw.pci_cmd_word & PCI_COMMAND_INVALIDATE)
2067 e1000_pci_set_mwi(&adapter->hw);
2069 if (netif_running(netdev)) {
2070 /* No need to loop, because 82542 supports only 1 queue */
2071 struct e1000_rx_ring *ring = &adapter->rx_ring[0];
2072 e1000_configure_rx(adapter);
2073 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring));
2078 * e1000_set_mac - Change the Ethernet Address of the NIC
2079 * @netdev: network interface device structure
2080 * @p: pointer to an address structure
2082 * Returns 0 on success, negative on failure
2086 e1000_set_mac(struct net_device *netdev, void *p)
2088 struct e1000_adapter *adapter = netdev_priv(netdev);
2089 struct sockaddr *addr = p;
2091 if (!is_valid_ether_addr(addr->sa_data))
2092 return -EADDRNOTAVAIL;
2094 /* 82542 2.0 needs to be in reset to write receive address registers */
2096 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2097 e1000_enter_82542_rst(adapter);
2099 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2100 memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
2102 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2104 /* With 82571 controllers, LAA may be overwritten (with the default)
2105 * due to controller reset from the other port. */
2106 if (adapter->hw.mac_type == e1000_82571) {
2107 /* activate the work around */
2108 adapter->hw.laa_is_present = 1;
2110 /* Hold a copy of the LAA in RAR[14] This is done so that
2111 * between the time RAR[0] gets clobbered and the time it
2112 * gets fixed (in e1000_watchdog), the actual LAA is in one
2113 * of the RARs and no incoming packets directed to this port
2114 * are dropped. Eventaully the LAA will be in RAR[0] and
2116 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr,
2117 E1000_RAR_ENTRIES - 1);
2120 if (adapter->hw.mac_type == e1000_82542_rev2_0)
2121 e1000_leave_82542_rst(adapter);
2127 * e1000_set_multi - Multicast and Promiscuous mode set
2128 * @netdev: network interface device structure
2130 * The set_multi entry point is called whenever the multicast address
2131 * list or the network interface flags are updated. This routine is
2132 * responsible for configuring the hardware for proper multicast,
2133 * promiscuous mode, and all-multi behavior.
2137 e1000_set_multi(struct net_device *netdev)
2139 struct e1000_adapter *adapter = netdev_priv(netdev);
2140 struct e1000_hw *hw = &adapter->hw;
2141 struct dev_mc_list *mc_ptr;
2143 uint32_t hash_value;
2144 int i, rar_entries = E1000_RAR_ENTRIES;
2146 /* reserve RAR[14] for LAA over-write work-around */
2147 if (adapter->hw.mac_type == e1000_82571)
2150 /* Check for Promiscuous and All Multicast modes */
2152 rctl = E1000_READ_REG(hw, RCTL);
2154 if (netdev->flags & IFF_PROMISC) {
2155 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2156 } else if (netdev->flags & IFF_ALLMULTI) {
2157 rctl |= E1000_RCTL_MPE;
2158 rctl &= ~E1000_RCTL_UPE;
2160 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2163 E1000_WRITE_REG(hw, RCTL, rctl);
2165 /* 82542 2.0 needs to be in reset to write receive address registers */
2167 if (hw->mac_type == e1000_82542_rev2_0)
2168 e1000_enter_82542_rst(adapter);
2170 /* load the first 14 multicast address into the exact filters 1-14
2171 * RAR 0 is used for the station MAC adddress
2172 * if there are not 14 addresses, go ahead and clear the filters
2173 * -- with 82571 controllers only 0-13 entries are filled here
2175 mc_ptr = netdev->mc_list;
2177 for (i = 1; i < rar_entries; i++) {
2179 e1000_rar_set(hw, mc_ptr->dmi_addr, i);
2180 mc_ptr = mc_ptr->next;
2182 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0);
2183 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0);
2187 /* clear the old settings from the multicast hash table */
2189 for (i = 0; i < E1000_NUM_MTA_REGISTERS; i++)
2190 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0);
2192 /* load any remaining addresses into the hash table */
2194 for (; mc_ptr; mc_ptr = mc_ptr->next) {
2195 hash_value = e1000_hash_mc_addr(hw, mc_ptr->dmi_addr);
2196 e1000_mta_set(hw, hash_value);
2199 if (hw->mac_type == e1000_82542_rev2_0)
2200 e1000_leave_82542_rst(adapter);
2203 /* Need to wait a few seconds after link up to get diagnostic information from
2207 e1000_update_phy_info(unsigned long data)
2209 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2210 e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
2214 * e1000_82547_tx_fifo_stall - Timer Call-back
2215 * @data: pointer to adapter cast into an unsigned long
2219 e1000_82547_tx_fifo_stall(unsigned long data)
2221 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2222 struct net_device *netdev = adapter->netdev;
2225 if (atomic_read(&adapter->tx_fifo_stall)) {
2226 if ((E1000_READ_REG(&adapter->hw, TDT) ==
2227 E1000_READ_REG(&adapter->hw, TDH)) &&
2228 (E1000_READ_REG(&adapter->hw, TDFT) ==
2229 E1000_READ_REG(&adapter->hw, TDFH)) &&
2230 (E1000_READ_REG(&adapter->hw, TDFTS) ==
2231 E1000_READ_REG(&adapter->hw, TDFHS))) {
2232 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2233 E1000_WRITE_REG(&adapter->hw, TCTL,
2234 tctl & ~E1000_TCTL_EN);
2235 E1000_WRITE_REG(&adapter->hw, TDFT,
2236 adapter->tx_head_addr);
2237 E1000_WRITE_REG(&adapter->hw, TDFH,
2238 adapter->tx_head_addr);
2239 E1000_WRITE_REG(&adapter->hw, TDFTS,
2240 adapter->tx_head_addr);
2241 E1000_WRITE_REG(&adapter->hw, TDFHS,
2242 adapter->tx_head_addr);
2243 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2244 E1000_WRITE_FLUSH(&adapter->hw);
2246 adapter->tx_fifo_head = 0;
2247 atomic_set(&adapter->tx_fifo_stall, 0);
2248 netif_wake_queue(netdev);
2250 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1);
2256 * e1000_watchdog - Timer Call-back
2257 * @data: pointer to adapter cast into an unsigned long
2260 e1000_watchdog(unsigned long data)
2262 struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2264 /* Do the rest outside of interrupt context */
2265 schedule_work(&adapter->watchdog_task);
2269 e1000_watchdog_task(struct e1000_adapter *adapter)
2271 struct net_device *netdev = adapter->netdev;
2272 struct e1000_tx_ring *txdr = adapter->tx_ring;
2273 uint32_t link, tctl;
2275 e1000_check_for_link(&adapter->hw);
2276 if (adapter->hw.mac_type == e1000_82573) {
2277 e1000_enable_tx_pkt_filtering(&adapter->hw);
2278 if (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id)
2279 e1000_update_mng_vlan(adapter);
2282 if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2283 !(E1000_READ_REG(&adapter->hw, TXCW) & E1000_TXCW_ANE))
2284 link = !adapter->hw.serdes_link_down;
2286 link = E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU;
2289 if (!netif_carrier_ok(netdev)) {
2290 e1000_get_speed_and_duplex(&adapter->hw,
2291 &adapter->link_speed,
2292 &adapter->link_duplex);
2294 DPRINTK(LINK, INFO, "NIC Link is Up %d Mbps %s\n",
2295 adapter->link_speed,
2296 adapter->link_duplex == FULL_DUPLEX ?
2297 "Full Duplex" : "Half Duplex");
2299 /* tweak tx_queue_len according to speed/duplex
2300 * and adjust the timeout factor */
2301 netdev->tx_queue_len = adapter->tx_queue_len;
2302 adapter->tx_timeout_factor = 1;
2304 switch (adapter->link_speed) {
2307 netdev->tx_queue_len = 10;
2308 adapter->tx_timeout_factor = 8;
2312 netdev->tx_queue_len = 100;
2313 /* maybe add some timeout factor ? */
2317 if ((adapter->hw.mac_type == e1000_82571 ||
2318 adapter->hw.mac_type == e1000_82572) &&
2319 adapter->txb2b == 0) {
2320 #define SPEED_MODE_BIT (1 << 21)
2322 tarc0 = E1000_READ_REG(&adapter->hw, TARC0);
2323 tarc0 &= ~SPEED_MODE_BIT;
2324 E1000_WRITE_REG(&adapter->hw, TARC0, tarc0);
2328 /* disable TSO for pcie and 10/100 speeds, to avoid
2329 * some hardware issues */
2330 if (!adapter->tso_force &&
2331 adapter->hw.bus_type == e1000_bus_type_pci_express){
2332 switch (adapter->link_speed) {
2336 "10/100 speed: disabling TSO\n");
2337 netdev->features &= ~NETIF_F_TSO;
2340 netdev->features |= NETIF_F_TSO;
2349 /* enable transmits in the hardware, need to do this
2350 * after setting TARC0 */
2351 tctl = E1000_READ_REG(&adapter->hw, TCTL);
2352 tctl |= E1000_TCTL_EN;
2353 E1000_WRITE_REG(&adapter->hw, TCTL, tctl);
2355 netif_carrier_on(netdev);
2356 netif_wake_queue(netdev);
2357 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2358 adapter->smartspeed = 0;
2361 if (netif_carrier_ok(netdev)) {
2362 adapter->link_speed = 0;
2363 adapter->link_duplex = 0;
2364 DPRINTK(LINK, INFO, "NIC Link is Down\n");
2365 netif_carrier_off(netdev);
2366 netif_stop_queue(netdev);
2367 mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
2369 /* 80003ES2LAN workaround--
2370 * For packet buffer work-around on link down event;
2371 * disable receives in the ISR and
2372 * reset device here in the watchdog
2374 if (adapter->hw.mac_type == e1000_80003es2lan) {
2376 schedule_work(&adapter->reset_task);
2380 e1000_smartspeed(adapter);
2383 e1000_update_stats(adapter);
2385 adapter->hw.tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2386 adapter->tpt_old = adapter->stats.tpt;
2387 adapter->hw.collision_delta = adapter->stats.colc - adapter->colc_old;
2388 adapter->colc_old = adapter->stats.colc;
2390 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2391 adapter->gorcl_old = adapter->stats.gorcl;
2392 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2393 adapter->gotcl_old = adapter->stats.gotcl;
2395 e1000_update_adaptive(&adapter->hw);
2397 if (!netif_carrier_ok(netdev)) {
2398 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) {
2399 /* We've lost link, so the controller stops DMA,
2400 * but we've got queued Tx work that's never going
2401 * to get done, so reset controller to flush Tx.
2402 * (Do the reset outside of interrupt context). */
2403 adapter->tx_timeout_count++;
2404 schedule_work(&adapter->reset_task);
2408 /* Dynamic mode for Interrupt Throttle Rate (ITR) */
2409 if (adapter->hw.mac_type >= e1000_82540 && adapter->itr == 1) {
2410 /* Symmetric Tx/Rx gets a reduced ITR=2000; Total
2411 * asymmetrical Tx or Rx gets ITR=8000; everyone
2412 * else is between 2000-8000. */
2413 uint32_t goc = (adapter->gotcl + adapter->gorcl) / 10000;
2414 uint32_t dif = (adapter->gotcl > adapter->gorcl ?
2415 adapter->gotcl - adapter->gorcl :
2416 adapter->gorcl - adapter->gotcl) / 10000;
2417 uint32_t itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
2418 E1000_WRITE_REG(&adapter->hw, ITR, 1000000000 / (itr * 256));
2421 /* Cause software interrupt to ensure rx ring is cleaned */
2422 E1000_WRITE_REG(&adapter->hw, ICS, E1000_ICS_RXDMT0);
2424 /* Force detection of hung controller every watchdog period */
2425 adapter->detect_tx_hung = TRUE;
2427 /* With 82571 controllers, LAA may be overwritten due to controller
2428 * reset from the other port. Set the appropriate LAA in RAR[0] */
2429 if (adapter->hw.mac_type == e1000_82571 && adapter->hw.laa_is_present)
2430 e1000_rar_set(&adapter->hw, adapter->hw.mac_addr, 0);
2432 /* Reset the timer */
2433 mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
2436 #define E1000_TX_FLAGS_CSUM 0x00000001
2437 #define E1000_TX_FLAGS_VLAN 0x00000002
2438 #define E1000_TX_FLAGS_TSO 0x00000004
2439 #define E1000_TX_FLAGS_IPV4 0x00000008
2440 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2441 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2444 e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2445 struct sk_buff *skb)
2448 struct e1000_context_desc *context_desc;
2449 struct e1000_buffer *buffer_info;
2451 uint32_t cmd_length = 0;
2452 uint16_t ipcse = 0, tucse, mss;
2453 uint8_t ipcss, ipcso, tucss, tucso, hdr_len;
2456 if (skb_shinfo(skb)->tso_size) {
2457 if (skb_header_cloned(skb)) {
2458 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2463 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2464 mss = skb_shinfo(skb)->tso_size;
2465 if (skb->protocol == ntohs(ETH_P_IP)) {
2466 skb->nh.iph->tot_len = 0;
2467 skb->nh.iph->check = 0;
2469 ~csum_tcpudp_magic(skb->nh.iph->saddr,
2474 cmd_length = E1000_TXD_CMD_IP;
2475 ipcse = skb->h.raw - skb->data - 1;
2476 #ifdef NETIF_F_TSO_IPV6
2477 } else if (skb->protocol == ntohs(ETH_P_IPV6)) {
2478 skb->nh.ipv6h->payload_len = 0;
2480 ~csum_ipv6_magic(&skb->nh.ipv6h->saddr,
2481 &skb->nh.ipv6h->daddr,
2488 ipcss = skb->nh.raw - skb->data;
2489 ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
2490 tucss = skb->h.raw - skb->data;
2491 tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
2494 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2495 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2497 i = tx_ring->next_to_use;
2498 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2499 buffer_info = &tx_ring->buffer_info[i];
2501 context_desc->lower_setup.ip_fields.ipcss = ipcss;
2502 context_desc->lower_setup.ip_fields.ipcso = ipcso;
2503 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
2504 context_desc->upper_setup.tcp_fields.tucss = tucss;
2505 context_desc->upper_setup.tcp_fields.tucso = tucso;
2506 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2507 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
2508 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2509 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2511 buffer_info->time_stamp = jiffies;
2513 if (++i == tx_ring->count) i = 0;
2514 tx_ring->next_to_use = i;
2523 static inline boolean_t
2524 e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2525 struct sk_buff *skb)
2527 struct e1000_context_desc *context_desc;
2528 struct e1000_buffer *buffer_info;
2532 if (likely(skb->ip_summed == CHECKSUM_HW)) {
2533 css = skb->h.raw - skb->data;
2535 i = tx_ring->next_to_use;
2536 buffer_info = &tx_ring->buffer_info[i];
2537 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2539 context_desc->upper_setup.tcp_fields.tucss = css;
2540 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum;
2541 context_desc->upper_setup.tcp_fields.tucse = 0;
2542 context_desc->tcp_seg_setup.data = 0;
2543 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2545 buffer_info->time_stamp = jiffies;
2547 if (unlikely(++i == tx_ring->count)) i = 0;
2548 tx_ring->next_to_use = i;
2556 #define E1000_MAX_TXD_PWR 12
2557 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2560 e1000_tx_map(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2561 struct sk_buff *skb, unsigned int first, unsigned int max_per_txd,
2562 unsigned int nr_frags, unsigned int mss)
2564 struct e1000_buffer *buffer_info;
2565 unsigned int len = skb->len;
2566 unsigned int offset = 0, size, count = 0, i;
2568 len -= skb->data_len;
2570 i = tx_ring->next_to_use;
2573 buffer_info = &tx_ring->buffer_info[i];
2574 size = min(len, max_per_txd);
2576 /* Workaround for Controller erratum --
2577 * descriptor for non-tso packet in a linear SKB that follows a
2578 * tso gets written back prematurely before the data is fully
2579 * DMAd to the controller */
2580 if (!skb->data_len && tx_ring->last_tx_tso &&
2581 !skb_shinfo(skb)->tso_size) {
2582 tx_ring->last_tx_tso = 0;
2586 /* Workaround for premature desc write-backs
2587 * in TSO mode. Append 4-byte sentinel desc */
2588 if (unlikely(mss && !nr_frags && size == len && size > 8))
2591 /* work-around for errata 10 and it applies
2592 * to all controllers in PCI-X mode
2593 * The fix is to make sure that the first descriptor of a
2594 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2596 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2597 (size > 2015) && count == 0))
2600 /* Workaround for potential 82544 hang in PCI-X. Avoid
2601 * terminating buffers within evenly-aligned dwords. */
2602 if (unlikely(adapter->pcix_82544 &&
2603 !((unsigned long)(skb->data + offset + size - 1) & 4) &&
2607 buffer_info->length = size;
2609 pci_map_single(adapter->pdev,
2613 buffer_info->time_stamp = jiffies;
2618 if (unlikely(++i == tx_ring->count)) i = 0;
2621 for (f = 0; f < nr_frags; f++) {
2622 struct skb_frag_struct *frag;
2624 frag = &skb_shinfo(skb)->frags[f];
2626 offset = frag->page_offset;
2629 buffer_info = &tx_ring->buffer_info[i];
2630 size = min(len, max_per_txd);
2632 /* Workaround for premature desc write-backs
2633 * in TSO mode. Append 4-byte sentinel desc */
2634 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8))
2637 /* Workaround for potential 82544 hang in PCI-X.
2638 * Avoid terminating buffers within evenly-aligned
2640 if (unlikely(adapter->pcix_82544 &&
2641 !((unsigned long)(frag->page+offset+size-1) & 4) &&
2645 buffer_info->length = size;
2647 pci_map_page(adapter->pdev,
2652 buffer_info->time_stamp = jiffies;
2657 if (unlikely(++i == tx_ring->count)) i = 0;
2661 i = (i == 0) ? tx_ring->count - 1 : i - 1;
2662 tx_ring->buffer_info[i].skb = skb;
2663 tx_ring->buffer_info[first].next_to_watch = i;
2669 e1000_tx_queue(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
2670 int tx_flags, int count)
2672 struct e1000_tx_desc *tx_desc = NULL;
2673 struct e1000_buffer *buffer_info;
2674 uint32_t txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2677 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) {
2678 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
2680 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2682 if (likely(tx_flags & E1000_TX_FLAGS_IPV4))
2683 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
2686 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) {
2687 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
2688 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
2691 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) {
2692 txd_lower |= E1000_TXD_CMD_VLE;
2693 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
2696 i = tx_ring->next_to_use;
2699 buffer_info = &tx_ring->buffer_info[i];
2700 tx_desc = E1000_TX_DESC(*tx_ring, i);
2701 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
2702 tx_desc->lower.data =
2703 cpu_to_le32(txd_lower | buffer_info->length);
2704 tx_desc->upper.data = cpu_to_le32(txd_upper);
2705 if (unlikely(++i == tx_ring->count)) i = 0;
2708 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
2710 /* Force memory writes to complete before letting h/w
2711 * know there are new descriptors to fetch. (Only
2712 * applicable for weak-ordered memory model archs,
2713 * such as IA-64). */
2716 tx_ring->next_to_use = i;
2717 writel(i, adapter->hw.hw_addr + tx_ring->tdt);
2721 * 82547 workaround to avoid controller hang in half-duplex environment.
2722 * The workaround is to avoid queuing a large packet that would span
2723 * the internal Tx FIFO ring boundary by notifying the stack to resend
2724 * the packet at a later time. This gives the Tx FIFO an opportunity to
2725 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2726 * to the beginning of the Tx FIFO.
2729 #define E1000_FIFO_HDR 0x10
2730 #define E1000_82547_PAD_LEN 0x3E0
2733 e1000_82547_fifo_workaround(struct e1000_adapter *adapter, struct sk_buff *skb)
2735 uint32_t fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head;
2736 uint32_t skb_fifo_len = skb->len + E1000_FIFO_HDR;
2738 E1000_ROUNDUP(skb_fifo_len, E1000_FIFO_HDR);
2740 if (adapter->link_duplex != HALF_DUPLEX)
2741 goto no_fifo_stall_required;
2743 if (atomic_read(&adapter->tx_fifo_stall))
2746 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) {
2747 atomic_set(&adapter->tx_fifo_stall, 1);
2751 no_fifo_stall_required:
2752 adapter->tx_fifo_head += skb_fifo_len;
2753 if (adapter->tx_fifo_head >= adapter->tx_fifo_size)
2754 adapter->tx_fifo_head -= adapter->tx_fifo_size;
2758 #define MINIMUM_DHCP_PACKET_SIZE 282
2760 e1000_transfer_dhcp_info(struct e1000_adapter *adapter, struct sk_buff *skb)
2762 struct e1000_hw *hw = &adapter->hw;
2763 uint16_t length, offset;
2764 if (vlan_tx_tag_present(skb)) {
2765 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
2766 ( adapter->hw.mng_cookie.status &
2767 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) )
2770 if (skb->len > MINIMUM_DHCP_PACKET_SIZE) {
2771 struct ethhdr *eth = (struct ethhdr *) skb->data;
2772 if ((htons(ETH_P_IP) == eth->h_proto)) {
2773 const struct iphdr *ip =
2774 (struct iphdr *)((uint8_t *)skb->data+14);
2775 if (IPPROTO_UDP == ip->protocol) {
2776 struct udphdr *udp =
2777 (struct udphdr *)((uint8_t *)ip +
2779 if (ntohs(udp->dest) == 67) {
2780 offset = (uint8_t *)udp + 8 - skb->data;
2781 length = skb->len - offset;
2783 return e1000_mng_write_dhcp_info(hw,
2793 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2795 e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2797 struct e1000_adapter *adapter = netdev_priv(netdev);
2798 struct e1000_tx_ring *tx_ring;
2799 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
2800 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
2801 unsigned int tx_flags = 0;
2802 unsigned int len = skb->len;
2803 unsigned long flags;
2804 unsigned int nr_frags = 0;
2805 unsigned int mss = 0;
2809 len -= skb->data_len;
2811 tx_ring = adapter->tx_ring;
2813 if (unlikely(skb->len <= 0)) {
2814 dev_kfree_skb_any(skb);
2815 return NETDEV_TX_OK;
2819 mss = skb_shinfo(skb)->tso_size;
2820 /* The controller does a simple calculation to
2821 * make sure there is enough room in the FIFO before
2822 * initiating the DMA for each buffer. The calc is:
2823 * 4 = ceil(buffer len/mss). To make sure we don't
2824 * overrun the FIFO, adjust the max buffer len if mss
2828 max_per_txd = min(mss << 2, max_per_txd);
2829 max_txd_pwr = fls(max_per_txd) - 1;
2831 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
2832 * points to just header, pull a few bytes of payload from
2833 * frags into skb->data */
2834 hdr_len = ((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
2835 if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
2836 switch (adapter->hw.mac_type) {
2837 unsigned int pull_size;
2841 pull_size = min((unsigned int)4, skb->data_len);
2842 if (!__pskb_pull_tail(skb, pull_size)) {
2844 "__pskb_pull_tail failed.\n");
2845 dev_kfree_skb_any(skb);
2848 len = skb->len - skb->data_len;
2857 /* reserve a descriptor for the offload context */
2858 if ((mss) || (skb->ip_summed == CHECKSUM_HW))
2862 if (skb->ip_summed == CHECKSUM_HW)
2867 /* Controller Erratum workaround */
2868 if (!skb->data_len && tx_ring->last_tx_tso &&
2869 !skb_shinfo(skb)->tso_size)
2873 count += TXD_USE_COUNT(len, max_txd_pwr);
2875 if (adapter->pcix_82544)
2878 /* work-around for errata 10 and it applies to all controllers
2879 * in PCI-X mode, so add one more descriptor to the count
2881 if (unlikely((adapter->hw.bus_type == e1000_bus_type_pcix) &&
2885 nr_frags = skb_shinfo(skb)->nr_frags;
2886 for (f = 0; f < nr_frags; f++)
2887 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
2889 if (adapter->pcix_82544)
2892 if (adapter->hw.tx_pkt_filtering && (adapter->hw.mac_type == e1000_82573) )
2893 e1000_transfer_dhcp_info(adapter, skb);
2895 local_irq_save(flags);
2896 if (!spin_trylock(&tx_ring->tx_lock)) {
2897 /* Collision - tell upper layer to requeue */
2898 local_irq_restore(flags);
2899 return NETDEV_TX_LOCKED;
2902 /* need: count + 2 desc gap to keep tail from touching
2903 * head, otherwise try next time */
2904 if (unlikely(E1000_DESC_UNUSED(tx_ring) < count + 2)) {
2905 netif_stop_queue(netdev);
2906 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2907 return NETDEV_TX_BUSY;
2910 if (unlikely(adapter->hw.mac_type == e1000_82547)) {
2911 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) {
2912 netif_stop_queue(netdev);
2913 mod_timer(&adapter->tx_fifo_stall_timer, jiffies);
2914 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2915 return NETDEV_TX_BUSY;
2919 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) {
2920 tx_flags |= E1000_TX_FLAGS_VLAN;
2921 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
2924 first = tx_ring->next_to_use;
2926 tso = e1000_tso(adapter, tx_ring, skb);
2928 dev_kfree_skb_any(skb);
2929 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2930 return NETDEV_TX_OK;
2934 tx_ring->last_tx_tso = 1;
2935 tx_flags |= E1000_TX_FLAGS_TSO;
2936 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb)))
2937 tx_flags |= E1000_TX_FLAGS_CSUM;
2939 /* Old method was to assume IPv4 packet by default if TSO was enabled.
2940 * 82571 hardware supports TSO capabilities for IPv6 as well...
2941 * no longer assume, we must. */
2942 if (likely(skb->protocol == ntohs(ETH_P_IP)))
2943 tx_flags |= E1000_TX_FLAGS_IPV4;
2945 e1000_tx_queue(adapter, tx_ring, tx_flags,
2946 e1000_tx_map(adapter, tx_ring, skb, first,
2947 max_per_txd, nr_frags, mss));
2949 netdev->trans_start = jiffies;
2951 /* Make sure there is space in the ring for the next send. */
2952 if (unlikely(E1000_DESC_UNUSED(tx_ring) < MAX_SKB_FRAGS + 2))
2953 netif_stop_queue(netdev);
2955 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
2956 return NETDEV_TX_OK;
2960 * e1000_tx_timeout - Respond to a Tx Hang
2961 * @netdev: network interface device structure
2965 e1000_tx_timeout(struct net_device *netdev)
2967 struct e1000_adapter *adapter = netdev_priv(netdev);
2969 /* Do the reset outside of interrupt context */
2970 adapter->tx_timeout_count++;
2971 schedule_work(&adapter->reset_task);
2975 e1000_reset_task(struct net_device *netdev)
2977 struct e1000_adapter *adapter = netdev_priv(netdev);
2979 e1000_down(adapter);
2984 * e1000_get_stats - Get System Network Statistics
2985 * @netdev: network interface device structure
2987 * Returns the address of the device statistics structure.
2988 * The statistics are actually updated from the timer callback.
2991 static struct net_device_stats *
2992 e1000_get_stats(struct net_device *netdev)
2994 struct e1000_adapter *adapter = netdev_priv(netdev);
2996 /* only return the current stats */
2997 return &adapter->net_stats;
3001 * e1000_change_mtu - Change the Maximum Transfer Unit
3002 * @netdev: network interface device structure
3003 * @new_mtu: new value for maximum frame size
3005 * Returns 0 on success, negative on failure
3009 e1000_change_mtu(struct net_device *netdev, int new_mtu)
3011 struct e1000_adapter *adapter = netdev_priv(netdev);
3012 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
3013 uint16_t eeprom_data = 0;
3015 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) ||
3016 (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3017 DPRINTK(PROBE, ERR, "Invalid MTU setting\n");
3021 /* Adapter-specific max frame size limits. */
3022 switch (adapter->hw.mac_type) {
3023 case e1000_82542_rev2_0:
3024 case e1000_82542_rev2_1:
3025 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3026 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n");
3031 /* only enable jumbo frames if ASPM is disabled completely
3032 * this means both bits must be zero in 0x1A bits 3:2 */
3033 e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1,
3035 if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) {
3036 if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) {
3038 "Jumbo Frames not supported.\n");
3043 /* fall through to get support */
3046 case e1000_80003es2lan:
3047 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3048 if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3049 DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
3054 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3059 if (adapter->hw.mac_type > e1000_82547_rev_2) {
3060 adapter->rx_buffer_len = max_frame;
3061 E1000_ROUNDUP(adapter->rx_buffer_len, 1024);
3063 if(unlikely((adapter->hw.mac_type < e1000_82543) &&
3064 (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE))) {
3065 DPRINTK(PROBE, ERR, "Jumbo Frames not supported "
3069 if(max_frame <= E1000_RXBUFFER_2048)
3070 adapter->rx_buffer_len = E1000_RXBUFFER_2048;
3071 else if(max_frame <= E1000_RXBUFFER_4096)
3072 adapter->rx_buffer_len = E1000_RXBUFFER_4096;
3073 else if(max_frame <= E1000_RXBUFFER_8192)
3074 adapter->rx_buffer_len = E1000_RXBUFFER_8192;
3075 else if(max_frame <= E1000_RXBUFFER_16384)
3076 adapter->rx_buffer_len = E1000_RXBUFFER_16384;
3080 netdev->mtu = new_mtu;
3082 if (netif_running(netdev)) {
3083 e1000_down(adapter);
3087 adapter->hw.max_frame_size = max_frame;
3093 * e1000_update_stats - Update the board statistics counters
3094 * @adapter: board private structure
3098 e1000_update_stats(struct e1000_adapter *adapter)
3100 struct e1000_hw *hw = &adapter->hw;
3101 unsigned long flags;
3104 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3106 spin_lock_irqsave(&adapter->stats_lock, flags);
3108 /* these counters are modified from e1000_adjust_tbi_stats,
3109 * called from the interrupt context, so they must only
3110 * be written while holding adapter->stats_lock
3113 adapter->stats.crcerrs += E1000_READ_REG(hw, CRCERRS);
3114 adapter->stats.gprc += E1000_READ_REG(hw, GPRC);
3115 adapter->stats.gorcl += E1000_READ_REG(hw, GORCL);
3116 adapter->stats.gorch += E1000_READ_REG(hw, GORCH);
3117 adapter->stats.bprc += E1000_READ_REG(hw, BPRC);
3118 adapter->stats.mprc += E1000_READ_REG(hw, MPRC);
3119 adapter->stats.roc += E1000_READ_REG(hw, ROC);
3120 adapter->stats.prc64 += E1000_READ_REG(hw, PRC64);
3121 adapter->stats.prc127 += E1000_READ_REG(hw, PRC127);
3122 adapter->stats.prc255 += E1000_READ_REG(hw, PRC255);
3123 adapter->stats.prc511 += E1000_READ_REG(hw, PRC511);
3124 adapter->stats.prc1023 += E1000_READ_REG(hw, PRC1023);
3125 adapter->stats.prc1522 += E1000_READ_REG(hw, PRC1522);
3127 adapter->stats.symerrs += E1000_READ_REG(hw, SYMERRS);
3128 adapter->stats.mpc += E1000_READ_REG(hw, MPC);
3129 adapter->stats.scc += E1000_READ_REG(hw, SCC);
3130 adapter->stats.ecol += E1000_READ_REG(hw, ECOL);
3131 adapter->stats.mcc += E1000_READ_REG(hw, MCC);
3132 adapter->stats.latecol += E1000_READ_REG(hw, LATECOL);
3133 adapter->stats.dc += E1000_READ_REG(hw, DC);
3134 adapter->stats.sec += E1000_READ_REG(hw, SEC);
3135 adapter->stats.rlec += E1000_READ_REG(hw, RLEC);
3136 adapter->stats.xonrxc += E1000_READ_REG(hw, XONRXC);
3137 adapter->stats.xontxc += E1000_READ_REG(hw, XONTXC);
3138 adapter->stats.xoffrxc += E1000_READ_REG(hw, XOFFRXC);
3139 adapter->stats.xofftxc += E1000_READ_REG(hw, XOFFTXC);
3140 adapter->stats.fcruc += E1000_READ_REG(hw, FCRUC);
3141 adapter->stats.gptc += E1000_READ_REG(hw, GPTC);
3142 adapter->stats.gotcl += E1000_READ_REG(hw, GOTCL);
3143 adapter->stats.gotch += E1000_READ_REG(hw, GOTCH);
3144 adapter->stats.rnbc += E1000_READ_REG(hw, RNBC);
3145 adapter->stats.ruc += E1000_READ_REG(hw, RUC);
3146 adapter->stats.rfc += E1000_READ_REG(hw, RFC);
3147 adapter->stats.rjc += E1000_READ_REG(hw, RJC);
3148 adapter->stats.torl += E1000_READ_REG(hw, TORL);
3149 adapter->stats.torh += E1000_READ_REG(hw, TORH);
3150 adapter->stats.totl += E1000_READ_REG(hw, TOTL);
3151 adapter->stats.toth += E1000_READ_REG(hw, TOTH);
3152 adapter->stats.tpr += E1000_READ_REG(hw, TPR);
3153 adapter->stats.ptc64 += E1000_READ_REG(hw, PTC64);
3154 adapter->stats.ptc127 += E1000_READ_REG(hw, PTC127);
3155 adapter->stats.ptc255 += E1000_READ_REG(hw, PTC255);
3156 adapter->stats.ptc511 += E1000_READ_REG(hw, PTC511);
3157 adapter->stats.ptc1023 += E1000_READ_REG(hw, PTC1023);
3158 adapter->stats.ptc1522 += E1000_READ_REG(hw, PTC1522);
3159 adapter->stats.mptc += E1000_READ_REG(hw, MPTC);
3160 adapter->stats.bptc += E1000_READ_REG(hw, BPTC);
3162 /* used for adaptive IFS */
3164 hw->tx_packet_delta = E1000_READ_REG(hw, TPT);
3165 adapter->stats.tpt += hw->tx_packet_delta;
3166 hw->collision_delta = E1000_READ_REG(hw, COLC);
3167 adapter->stats.colc += hw->collision_delta;
3169 if (hw->mac_type >= e1000_82543) {
3170 adapter->stats.algnerrc += E1000_READ_REG(hw, ALGNERRC);
3171 adapter->stats.rxerrc += E1000_READ_REG(hw, RXERRC);
3172 adapter->stats.tncrs += E1000_READ_REG(hw, TNCRS);
3173 adapter->stats.cexterr += E1000_READ_REG(hw, CEXTERR);
3174 adapter->stats.tsctc += E1000_READ_REG(hw, TSCTC);
3175 adapter->stats.tsctfc += E1000_READ_REG(hw, TSCTFC);
3177 if (hw->mac_type > e1000_82547_rev_2) {
3178 adapter->stats.iac += E1000_READ_REG(hw, IAC);
3179 adapter->stats.icrxoc += E1000_READ_REG(hw, ICRXOC);
3180 adapter->stats.icrxptc += E1000_READ_REG(hw, ICRXPTC);
3181 adapter->stats.icrxatc += E1000_READ_REG(hw, ICRXATC);
3182 adapter->stats.ictxptc += E1000_READ_REG(hw, ICTXPTC);
3183 adapter->stats.ictxatc += E1000_READ_REG(hw, ICTXATC);
3184 adapter->stats.ictxqec += E1000_READ_REG(hw, ICTXQEC);
3185 adapter->stats.ictxqmtc += E1000_READ_REG(hw, ICTXQMTC);
3186 adapter->stats.icrxdmtc += E1000_READ_REG(hw, ICRXDMTC);
3189 /* Fill out the OS statistics structure */
3191 adapter->net_stats.rx_packets = adapter->stats.gprc;
3192 adapter->net_stats.tx_packets = adapter->stats.gptc;
3193 adapter->net_stats.rx_bytes = adapter->stats.gorcl;
3194 adapter->net_stats.tx_bytes = adapter->stats.gotcl;
3195 adapter->net_stats.multicast = adapter->stats.mprc;
3196 adapter->net_stats.collisions = adapter->stats.colc;
3200 /* RLEC on some newer hardware can be incorrect so build
3201 * our own version based on RUC and ROC */
3202 adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3203 adapter->stats.crcerrs + adapter->stats.algnerrc +
3204 adapter->stats.ruc + adapter->stats.roc +
3205 adapter->stats.cexterr;
3206 adapter->net_stats.rx_dropped = 0;
3207 adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3209 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3210 adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3211 adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3215 adapter->net_stats.tx_errors = adapter->stats.ecol +
3216 adapter->stats.latecol;
3217 adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3218 adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3219 adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3221 /* Tx Dropped needs to be maintained elsewhere */
3225 if (hw->media_type == e1000_media_type_copper) {
3226 if ((adapter->link_speed == SPEED_1000) &&
3227 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) {
3228 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3229 adapter->phy_stats.idle_errors += phy_tmp;
3232 if ((hw->mac_type <= e1000_82546) &&
3233 (hw->phy_type == e1000_phy_m88) &&
3234 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp))
3235 adapter->phy_stats.receive_errors += phy_tmp;
3238 spin_unlock_irqrestore(&adapter->stats_lock, flags);
3242 * e1000_intr - Interrupt Handler
3243 * @irq: interrupt number
3244 * @data: pointer to a network interface device structure
3245 * @pt_regs: CPU registers structure
3249 e1000_intr(int irq, void *data, struct pt_regs *regs)
3251 struct net_device *netdev = data;
3252 struct e1000_adapter *adapter = netdev_priv(netdev);
3253 struct e1000_hw *hw = &adapter->hw;
3254 uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
3255 #ifndef CONFIG_E1000_NAPI
3258 /* Interrupt Auto-Mask...upon reading ICR,
3259 * interrupts are masked. No need for the
3260 * IMC write, but it does mean we should
3261 * account for it ASAP. */
3262 if (likely(hw->mac_type >= e1000_82571))
3263 atomic_inc(&adapter->irq_sem);
3266 if (unlikely(!icr)) {
3267 #ifdef CONFIG_E1000_NAPI
3268 if (hw->mac_type >= e1000_82571)
3269 e1000_irq_enable(adapter);
3271 return IRQ_NONE; /* Not our interrupt */
3274 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
3275 hw->get_link_status = 1;
3276 /* 80003ES2LAN workaround--
3277 * For packet buffer work-around on link down event;
3278 * disable receives here in the ISR and
3279 * reset adapter in watchdog
3281 if (netif_carrier_ok(netdev) &&
3282 (adapter->hw.mac_type == e1000_80003es2lan)) {
3283 /* disable receives */
3284 rctl = E1000_READ_REG(hw, RCTL);
3285 E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
3287 mod_timer(&adapter->watchdog_timer, jiffies);
3290 #ifdef CONFIG_E1000_NAPI
3291 if (unlikely(hw->mac_type < e1000_82571)) {
3292 atomic_inc(&adapter->irq_sem);
3293 E1000_WRITE_REG(hw, IMC, ~0);
3294 E1000_WRITE_FLUSH(hw);
3296 if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
3297 __netif_rx_schedule(&adapter->polling_netdev[0]);
3299 e1000_irq_enable(adapter);
3301 /* Writing IMC and IMS is needed for 82547.
3302 * Due to Hub Link bus being occupied, an interrupt
3303 * de-assertion message is not able to be sent.
3304 * When an interrupt assertion message is generated later,
3305 * two messages are re-ordered and sent out.
3306 * That causes APIC to think 82547 is in de-assertion
3307 * state, while 82547 is in assertion state, resulting
3308 * in dead lock. Writing IMC forces 82547 into
3309 * de-assertion state.
3311 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2) {
3312 atomic_inc(&adapter->irq_sem);
3313 E1000_WRITE_REG(hw, IMC, ~0);
3316 for (i = 0; i < E1000_MAX_INTR; i++)
3317 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
3318 !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
3321 if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
3322 e1000_irq_enable(adapter);
3329 #ifdef CONFIG_E1000_NAPI
3331 * e1000_clean - NAPI Rx polling callback
3332 * @adapter: board private structure
3336 e1000_clean(struct net_device *poll_dev, int *budget)
3338 struct e1000_adapter *adapter;
3339 int work_to_do = min(*budget, poll_dev->quota);
3340 int tx_cleaned = 0, i = 0, work_done = 0;
3342 /* Must NOT use netdev_priv macro here. */
3343 adapter = poll_dev->priv;
3345 /* Keep link state information with original netdev */
3346 if (!netif_carrier_ok(adapter->netdev))
3349 while (poll_dev != &adapter->polling_netdev[i]) {
3351 if (unlikely(i == adapter->num_rx_queues))
3355 if (likely(adapter->num_tx_queues == 1)) {
3356 /* e1000_clean is called per-cpu. This lock protects
3357 * tx_ring[0] from being cleaned by multiple cpus
3358 * simultaneously. A failure obtaining the lock means
3359 * tx_ring[0] is currently being cleaned anyway. */
3360 if (spin_trylock(&adapter->tx_queue_lock)) {
3361 tx_cleaned = e1000_clean_tx_irq(adapter,
3362 &adapter->tx_ring[0]);
3363 spin_unlock(&adapter->tx_queue_lock);
3366 tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
3368 adapter->clean_rx(adapter, &adapter->rx_ring[i],
3369 &work_done, work_to_do);
3371 *budget -= work_done;
3372 poll_dev->quota -= work_done;
3374 /* If no Tx and not enough Rx work done, exit the polling mode */
3375 if ((!tx_cleaned && (work_done == 0)) ||
3376 !netif_running(adapter->netdev)) {
3378 netif_rx_complete(poll_dev);
3379 e1000_irq_enable(adapter);
3388 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3389 * @adapter: board private structure
3393 e1000_clean_tx_irq(struct e1000_adapter *adapter,
3394 struct e1000_tx_ring *tx_ring)
3396 struct net_device *netdev = adapter->netdev;
3397 struct e1000_tx_desc *tx_desc, *eop_desc;
3398 struct e1000_buffer *buffer_info;
3399 unsigned int i, eop;
3400 #ifdef CONFIG_E1000_NAPI
3401 unsigned int count = 0;
3403 boolean_t cleaned = FALSE;
3405 i = tx_ring->next_to_clean;
3406 eop = tx_ring->buffer_info[i].next_to_watch;
3407 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3409 while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
3410 for (cleaned = FALSE; !cleaned; ) {
3411 tx_desc = E1000_TX_DESC(*tx_ring, i);
3412 buffer_info = &tx_ring->buffer_info[i];
3413 cleaned = (i == eop);
3415 e1000_unmap_and_free_tx_resource(adapter, buffer_info);
3416 memset(tx_desc, 0, sizeof(struct e1000_tx_desc));
3418 if (unlikely(++i == tx_ring->count)) i = 0;
3422 eop = tx_ring->buffer_info[i].next_to_watch;
3423 eop_desc = E1000_TX_DESC(*tx_ring, eop);
3424 #ifdef CONFIG_E1000_NAPI
3425 #define E1000_TX_WEIGHT 64
3426 /* weight of a sort for tx, to avoid endless transmit cleanup */
3427 if (count++ == E1000_TX_WEIGHT) break;
3431 tx_ring->next_to_clean = i;
3433 spin_lock(&tx_ring->tx_lock);
3435 if (unlikely(cleaned && netif_queue_stopped(netdev) &&
3436 netif_carrier_ok(netdev)))
3437 netif_wake_queue(netdev);
3439 spin_unlock(&tx_ring->tx_lock);
3441 if (adapter->detect_tx_hung) {
3442 /* Detect a transmit hang in hardware, this serializes the
3443 * check with the clearing of time_stamp and movement of i */
3444 adapter->detect_tx_hung = FALSE;
3445 if (tx_ring->buffer_info[eop].dma &&
3446 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp +
3447 (adapter->tx_timeout_factor * HZ))
3448 && !(E1000_READ_REG(&adapter->hw, STATUS) &
3449 E1000_STATUS_TXOFF)) {
3451 /* detected Tx unit hang */
3452 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
3456 " next_to_use <%x>\n"
3457 " next_to_clean <%x>\n"
3458 "buffer_info[next_to_clean]\n"
3459 " time_stamp <%lx>\n"
3460 " next_to_watch <%x>\n"
3462 " next_to_watch.status <%x>\n",
3463 (unsigned long)((tx_ring - adapter->tx_ring) /
3464 sizeof(struct e1000_tx_ring)),
3465 readl(adapter->hw.hw_addr + tx_ring->tdh),
3466 readl(adapter->hw.hw_addr + tx_ring->tdt),
3467 tx_ring->next_to_use,
3468 tx_ring->next_to_clean,
3469 tx_ring->buffer_info[eop].time_stamp,
3472 eop_desc->upper.fields.status);
3473 netif_stop_queue(netdev);
3480 * e1000_rx_checksum - Receive Checksum Offload for 82543
3481 * @adapter: board private structure
3482 * @status_err: receive descriptor status and error fields
3483 * @csum: receive descriptor csum field
3484 * @sk_buff: socket buffer with received data
3488 e1000_rx_checksum(struct e1000_adapter *adapter,
3489 uint32_t status_err, uint32_t csum,
3490 struct sk_buff *skb)
3492 uint16_t status = (uint16_t)status_err;
3493 uint8_t errors = (uint8_t)(status_err >> 24);
3494 skb->ip_summed = CHECKSUM_NONE;
3496 /* 82543 or newer only */
3497 if (unlikely(adapter->hw.mac_type < e1000_82543)) return;
3498 /* Ignore Checksum bit is set */
3499 if (unlikely(status & E1000_RXD_STAT_IXSM)) return;
3500 /* TCP/UDP checksum error bit is set */
3501 if (unlikely(errors & E1000_RXD_ERR_TCPE)) {
3502 /* let the stack verify checksum errors */
3503 adapter->hw_csum_err++;
3506 /* TCP/UDP Checksum has not been calculated */
3507 if (adapter->hw.mac_type <= e1000_82547_rev_2) {
3508 if (!(status & E1000_RXD_STAT_TCPCS))
3511 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
3514 /* It must be a TCP or UDP packet with a valid checksum */
3515 if (likely(status & E1000_RXD_STAT_TCPCS)) {
3516 /* TCP checksum is good */
3517 skb->ip_summed = CHECKSUM_UNNECESSARY;
3518 } else if (adapter->hw.mac_type > e1000_82547_rev_2) {
3519 /* IP fragment with UDP payload */
3520 /* Hardware complements the payload checksum, so we undo it
3521 * and then put the value in host order for further stack use.
3523 csum = ntohl(csum ^ 0xFFFF);
3525 skb->ip_summed = CHECKSUM_HW;
3527 adapter->hw_csum_good++;
3531 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3532 * @adapter: board private structure
3536 #ifdef CONFIG_E1000_NAPI
3537 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3538 struct e1000_rx_ring *rx_ring,
3539 int *work_done, int work_to_do)
3541 e1000_clean_rx_irq(struct e1000_adapter *adapter,
3542 struct e1000_rx_ring *rx_ring)
3545 struct net_device *netdev = adapter->netdev;
3546 struct pci_dev *pdev = adapter->pdev;
3547 struct e1000_rx_desc *rx_desc, *next_rxd;
3548 struct e1000_buffer *buffer_info, *next_buffer;
3549 unsigned long flags;
3553 int cleaned_count = 0;
3554 boolean_t cleaned = FALSE;
3556 i = rx_ring->next_to_clean;
3557 rx_desc = E1000_RX_DESC(*rx_ring, i);
3558 buffer_info = &rx_ring->buffer_info[i];
3560 while (rx_desc->status & E1000_RXD_STAT_DD) {
3561 struct sk_buff *skb, *next_skb;
3563 #ifdef CONFIG_E1000_NAPI
3564 if (*work_done >= work_to_do)
3568 status = rx_desc->status;
3569 skb = buffer_info->skb;
3570 buffer_info->skb = NULL;
3572 if (++i == rx_ring->count) i = 0;
3573 next_rxd = E1000_RX_DESC(*rx_ring, i);
3574 next_buffer = &rx_ring->buffer_info[i];
3575 next_skb = next_buffer->skb;
3579 pci_unmap_single(pdev,
3581 buffer_info->length,
3582 PCI_DMA_FROMDEVICE);
3584 length = le16_to_cpu(rx_desc->length);
3586 if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
3587 /* All receives must fit into a single buffer */
3588 E1000_DBG("%s: Receive packet consumed multiple"
3589 " buffers\n", netdev->name);
3590 dev_kfree_skb_irq(skb);
3594 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) {
3595 last_byte = *(skb->data + length - 1);
3596 if (TBI_ACCEPT(&adapter->hw, status,
3597 rx_desc->errors, length, last_byte)) {
3598 spin_lock_irqsave(&adapter->stats_lock, flags);
3599 e1000_tbi_adjust_stats(&adapter->hw,
3602 spin_unlock_irqrestore(&adapter->stats_lock,
3606 dev_kfree_skb_irq(skb);
3611 /* code added for copybreak, this should improve
3612 * performance for small packets with large amounts
3613 * of reassembly being done in the stack */
3614 #define E1000_CB_LENGTH 256
3615 if (length < E1000_CB_LENGTH) {
3616 struct sk_buff *new_skb =
3617 dev_alloc_skb(length + NET_IP_ALIGN);
3619 skb_reserve(new_skb, NET_IP_ALIGN);
3620 new_skb->dev = netdev;
3621 memcpy(new_skb->data - NET_IP_ALIGN,
3622 skb->data - NET_IP_ALIGN,
3623 length + NET_IP_ALIGN);
3624 /* save the skb in buffer_info as good */
3625 buffer_info->skb = skb;
3627 skb_put(skb, length);
3630 skb_put(skb, length);
3632 /* end copybreak code */
3634 /* Receive Checksum Offload */
3635 e1000_rx_checksum(adapter,
3636 (uint32_t)(status) |
3637 ((uint32_t)(rx_desc->errors) << 24),
3638 rx_desc->csum, skb);
3640 skb->protocol = eth_type_trans(skb, netdev);
3641 #ifdef CONFIG_E1000_NAPI
3642 if (unlikely(adapter->vlgrp &&
3643 (status & E1000_RXD_STAT_VP))) {
3644 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3645 le16_to_cpu(rx_desc->special) &
3646 E1000_RXD_SPC_VLAN_MASK);
3648 netif_receive_skb(skb);
3650 #else /* CONFIG_E1000_NAPI */
3651 if (unlikely(adapter->vlgrp &&
3652 (status & E1000_RXD_STAT_VP))) {
3653 vlan_hwaccel_rx(skb, adapter->vlgrp,
3654 le16_to_cpu(rx_desc->special) &
3655 E1000_RXD_SPC_VLAN_MASK);
3659 #endif /* CONFIG_E1000_NAPI */
3660 netdev->last_rx = jiffies;
3663 rx_desc->status = 0;
3665 /* return some buffers to hardware, one at a time is too slow */
3666 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3667 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3672 buffer_info = next_buffer;
3674 rx_ring->next_to_clean = i;
3676 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3678 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3684 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
3685 * @adapter: board private structure
3689 #ifdef CONFIG_E1000_NAPI
3690 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3691 struct e1000_rx_ring *rx_ring,
3692 int *work_done, int work_to_do)
3694 e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
3695 struct e1000_rx_ring *rx_ring)
3698 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
3699 struct net_device *netdev = adapter->netdev;
3700 struct pci_dev *pdev = adapter->pdev;
3701 struct e1000_buffer *buffer_info, *next_buffer;
3702 struct e1000_ps_page *ps_page;
3703 struct e1000_ps_page_dma *ps_page_dma;
3704 struct sk_buff *skb, *next_skb;
3706 uint32_t length, staterr;
3707 int cleaned_count = 0;
3708 boolean_t cleaned = FALSE;
3710 i = rx_ring->next_to_clean;
3711 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3712 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3713 buffer_info = &rx_ring->buffer_info[i];
3715 while (staterr & E1000_RXD_STAT_DD) {
3716 ps_page = &rx_ring->ps_page[i];
3717 ps_page_dma = &rx_ring->ps_page_dma[i];
3718 #ifdef CONFIG_E1000_NAPI
3719 if (unlikely(*work_done >= work_to_do))
3723 skb = buffer_info->skb;
3725 if (++i == rx_ring->count) i = 0;
3726 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
3727 next_buffer = &rx_ring->buffer_info[i];
3728 next_skb = next_buffer->skb;
3732 pci_unmap_single(pdev, buffer_info->dma,
3733 buffer_info->length,
3734 PCI_DMA_FROMDEVICE);
3736 if (unlikely(!(staterr & E1000_RXD_STAT_EOP))) {
3737 E1000_DBG("%s: Packet Split buffers didn't pick up"
3738 " the full packet\n", netdev->name);
3739 dev_kfree_skb_irq(skb);
3743 if (unlikely(staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK)) {
3744 dev_kfree_skb_irq(skb);
3748 length = le16_to_cpu(rx_desc->wb.middle.length0);
3750 if (unlikely(!length)) {
3751 E1000_DBG("%s: Last part of the packet spanning"
3752 " multiple descriptors\n", netdev->name);
3753 dev_kfree_skb_irq(skb);
3758 skb_put(skb, length);
3761 /* this looks ugly, but it seems compiler issues make it
3762 more efficient than reusing j */
3763 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
3765 /* page alloc/put takes too long and effects small packet
3766 * throughput, so unsplit small packets and save the alloc/put*/
3767 if (l1 && ((length + l1) < E1000_CB_LENGTH)) {
3769 /* there is no documentation about how to call
3770 * kmap_atomic, so we can't hold the mapping
3772 pci_dma_sync_single_for_cpu(pdev,
3773 ps_page_dma->ps_page_dma[0],
3775 PCI_DMA_FROMDEVICE);
3776 vaddr = kmap_atomic(ps_page->ps_page[0],
3777 KM_SKB_DATA_SOFTIRQ);
3778 memcpy(skb->tail, vaddr, l1);
3779 kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
3780 pci_dma_sync_single_for_device(pdev,
3781 ps_page_dma->ps_page_dma[0],
3782 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3789 for (j = 0; j < adapter->rx_ps_pages; j++) {
3790 if (!(length = le16_to_cpu(rx_desc->wb.upper.length[j])))
3793 pci_unmap_page(pdev, ps_page_dma->ps_page_dma[j],
3794 PAGE_SIZE, PCI_DMA_FROMDEVICE);
3795 ps_page_dma->ps_page_dma[j] = 0;
3796 skb_fill_page_desc(skb, j, ps_page->ps_page[j], 0,
3798 ps_page->ps_page[j] = NULL;
3800 skb->data_len += length;
3804 e1000_rx_checksum(adapter, staterr,
3805 rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
3806 skb->protocol = eth_type_trans(skb, netdev);
3808 if (likely(rx_desc->wb.upper.header_status &
3809 E1000_RXDPS_HDRSTAT_HDRSP))
3810 adapter->rx_hdr_split++;
3811 #ifdef CONFIG_E1000_NAPI
3812 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3813 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
3814 le16_to_cpu(rx_desc->wb.middle.vlan) &
3815 E1000_RXD_SPC_VLAN_MASK);
3817 netif_receive_skb(skb);
3819 #else /* CONFIG_E1000_NAPI */
3820 if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
3821 vlan_hwaccel_rx(skb, adapter->vlgrp,
3822 le16_to_cpu(rx_desc->wb.middle.vlan) &
3823 E1000_RXD_SPC_VLAN_MASK);
3827 #endif /* CONFIG_E1000_NAPI */
3828 netdev->last_rx = jiffies;
3831 rx_desc->wb.middle.status_error &= ~0xFF;
3832 buffer_info->skb = NULL;
3834 /* return some buffers to hardware, one at a time is too slow */
3835 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
3836 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3841 buffer_info = next_buffer;
3843 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
3845 rx_ring->next_to_clean = i;
3847 cleaned_count = E1000_DESC_UNUSED(rx_ring);
3849 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count);
3855 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
3856 * @adapter: address of board private structure
3860 e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
3861 struct e1000_rx_ring *rx_ring,
3864 struct net_device *netdev = adapter->netdev;
3865 struct pci_dev *pdev = adapter->pdev;
3866 struct e1000_rx_desc *rx_desc;
3867 struct e1000_buffer *buffer_info;
3868 struct sk_buff *skb;
3870 unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
3872 i = rx_ring->next_to_use;
3873 buffer_info = &rx_ring->buffer_info[i];
3875 while (cleaned_count--) {
3876 if (!(skb = buffer_info->skb))
3877 skb = dev_alloc_skb(bufsz);
3884 if (unlikely(!skb)) {
3885 /* Better luck next round */
3886 adapter->alloc_rx_buff_failed++;
3890 /* Fix for errata 23, can't cross 64kB boundary */
3891 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3892 struct sk_buff *oldskb = skb;
3893 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes "
3894 "at %p\n", bufsz, skb->data);
3895 /* Try again, without freeing the previous */
3896 skb = dev_alloc_skb(bufsz);
3897 /* Failed allocation, critical failure */
3899 dev_kfree_skb(oldskb);
3903 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) {
3906 dev_kfree_skb(oldskb);
3907 break; /* while !buffer_info->skb */
3909 /* Use new allocation */
3910 dev_kfree_skb(oldskb);
3913 /* Make buffer alignment 2 beyond a 16 byte boundary
3914 * this will result in a 16 byte aligned IP header after
3915 * the 14 byte MAC header is removed
3917 skb_reserve(skb, NET_IP_ALIGN);
3921 buffer_info->skb = skb;
3922 buffer_info->length = adapter->rx_buffer_len;
3924 buffer_info->dma = pci_map_single(pdev,
3926 adapter->rx_buffer_len,
3927 PCI_DMA_FROMDEVICE);
3929 /* Fix for errata 23, can't cross 64kB boundary */
3930 if (!e1000_check_64k_bound(adapter,
3931 (void *)(unsigned long)buffer_info->dma,
3932 adapter->rx_buffer_len)) {
3933 DPRINTK(RX_ERR, ERR,
3934 "dma align check failed: %u bytes at %p\n",
3935 adapter->rx_buffer_len,
3936 (void *)(unsigned long)buffer_info->dma);
3938 buffer_info->skb = NULL;
3940 pci_unmap_single(pdev, buffer_info->dma,
3941 adapter->rx_buffer_len,
3942 PCI_DMA_FROMDEVICE);
3944 break; /* while !buffer_info->skb */
3946 rx_desc = E1000_RX_DESC(*rx_ring, i);
3947 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3949 if (unlikely(++i == rx_ring->count))
3951 buffer_info = &rx_ring->buffer_info[i];
3954 if (likely(rx_ring->next_to_use != i)) {
3955 rx_ring->next_to_use = i;
3956 if (unlikely(i-- == 0))
3957 i = (rx_ring->count - 1);
3959 /* Force memory writes to complete before letting h/w
3960 * know there are new descriptors to fetch. (Only
3961 * applicable for weak-ordered memory model archs,
3962 * such as IA-64). */
3964 writel(i, adapter->hw.hw_addr + rx_ring->rdt);
3969 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
3970 * @adapter: address of board private structure
3974 e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
3975 struct e1000_rx_ring *rx_ring,
3978 struct net_device *netdev = adapter->netdev;
3979 struct pci_dev *pdev = adapter->pdev;
3980 union e1000_rx_desc_packet_split *rx_desc;
3981 struct e1000_buffer *buffer_info;
3982 struct e1000_ps_page *ps_page;
3983 struct e1000_ps_page_dma *ps_page_dma;
3984 struct sk_buff *skb;
3987 i = rx_ring->next_to_use;
3988 buffer_info = &rx_ring->buffer_info[i];
3989 ps_page = &rx_ring->ps_page[i];
3990 ps_page_dma = &rx_ring->ps_page_dma[i];
3992 while (cleaned_count--) {
3993 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
3995 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
3996 if (j < adapter->rx_ps_pages) {
3997 if (likely(!ps_page->ps_page[j])) {
3998 ps_page->ps_page[j] =
3999 alloc_page(GFP_ATOMIC);
4000 if (unlikely(!ps_page->ps_page[j])) {
4001 adapter->alloc_rx_buff_failed++;
4004 ps_page_dma->ps_page_dma[j] =
4006 ps_page->ps_page[j],
4008 PCI_DMA_FROMDEVICE);
4010 /* Refresh the desc even if buffer_addrs didn't
4011 * change because each write-back erases
4014 rx_desc->read.buffer_addr[j+1] =
4015 cpu_to_le64(ps_page_dma->ps_page_dma[j]);
4017 rx_desc->read.buffer_addr[j+1] = ~0;
4020 skb = dev_alloc_skb(adapter->rx_ps_bsize0 + NET_IP_ALIGN);
4022 if (unlikely(!skb)) {
4023 adapter->alloc_rx_buff_failed++;
4027 /* Make buffer alignment 2 beyond a 16 byte boundary
4028 * this will result in a 16 byte aligned IP header after
4029 * the 14 byte MAC header is removed
4031 skb_reserve(skb, NET_IP_ALIGN);
4035 buffer_info->skb = skb;
4036 buffer_info->length = adapter->rx_ps_bsize0;
4037 buffer_info->dma = pci_map_single(pdev, skb->data,
4038 adapter->rx_ps_bsize0,
4039 PCI_DMA_FROMDEVICE);
4041 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
4043 if (unlikely(++i == rx_ring->count)) i = 0;
4044 buffer_info = &rx_ring->buffer_info[i];
4045 ps_page = &rx_ring->ps_page[i];
4046 ps_page_dma = &rx_ring->ps_page_dma[i];
4050 if (likely(rx_ring->next_to_use != i)) {
4051 rx_ring->next_to_use = i;
4052 if (unlikely(i-- == 0)) i = (rx_ring->count - 1);
4054 /* Force memory writes to complete before letting h/w
4055 * know there are new descriptors to fetch. (Only
4056 * applicable for weak-ordered memory model archs,
4057 * such as IA-64). */
4059 /* Hardware increments by 16 bytes, but packet split
4060 * descriptors are 32 bytes...so we increment tail
4063 writel(i<<1, adapter->hw.hw_addr + rx_ring->rdt);
4068 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4073 e1000_smartspeed(struct e1000_adapter *adapter)
4075 uint16_t phy_status;
4078 if ((adapter->hw.phy_type != e1000_phy_igp) || !adapter->hw.autoneg ||
4079 !(adapter->hw.autoneg_advertised & ADVERTISE_1000_FULL))
4082 if (adapter->smartspeed == 0) {
4083 /* If Master/Slave config fault is asserted twice,
4084 * we assume back-to-back */
4085 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4086 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4087 e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_status);
4088 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return;
4089 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4090 if (phy_ctrl & CR_1000T_MS_ENABLE) {
4091 phy_ctrl &= ~CR_1000T_MS_ENABLE;
4092 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL,
4094 adapter->smartspeed++;
4095 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4096 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL,
4098 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4099 MII_CR_RESTART_AUTO_NEG);
4100 e1000_write_phy_reg(&adapter->hw, PHY_CTRL,
4105 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) {
4106 /* If still no link, perhaps using 2/3 pair cable */
4107 e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_ctrl);
4108 phy_ctrl |= CR_1000T_MS_ENABLE;
4109 e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_ctrl);
4110 if (!e1000_phy_setup_autoneg(&adapter->hw) &&
4111 !e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_ctrl)) {
4112 phy_ctrl |= (MII_CR_AUTO_NEG_EN |
4113 MII_CR_RESTART_AUTO_NEG);
4114 e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_ctrl);
4117 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4118 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX)
4119 adapter->smartspeed = 0;
4130 e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4136 return e1000_mii_ioctl(netdev, ifr, cmd);
4150 e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4152 struct e1000_adapter *adapter = netdev_priv(netdev);
4153 struct mii_ioctl_data *data = if_mii(ifr);
4157 unsigned long flags;
4159 if (adapter->hw.media_type != e1000_media_type_copper)
4164 data->phy_id = adapter->hw.phy_addr;
4167 if (!capable(CAP_NET_ADMIN))
4169 spin_lock_irqsave(&adapter->stats_lock, flags);
4170 if (e1000_read_phy_reg(&adapter->hw, data->reg_num & 0x1F,
4172 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4175 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4178 if (!capable(CAP_NET_ADMIN))
4180 if (data->reg_num & ~(0x1F))
4182 mii_reg = data->val_in;
4183 spin_lock_irqsave(&adapter->stats_lock, flags);
4184 if (e1000_write_phy_reg(&adapter->hw, data->reg_num,
4186 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4189 if (adapter->hw.phy_type == e1000_phy_m88) {
4190 switch (data->reg_num) {
4192 if (mii_reg & MII_CR_POWER_DOWN)
4194 if (mii_reg & MII_CR_AUTO_NEG_EN) {
4195 adapter->hw.autoneg = 1;
4196 adapter->hw.autoneg_advertised = 0x2F;
4199 spddplx = SPEED_1000;
4200 else if (mii_reg & 0x2000)
4201 spddplx = SPEED_100;
4204 spddplx += (mii_reg & 0x100)
4207 retval = e1000_set_spd_dplx(adapter,
4210 spin_unlock_irqrestore(
4211 &adapter->stats_lock,
4216 if (netif_running(adapter->netdev)) {
4217 e1000_down(adapter);
4220 e1000_reset(adapter);
4222 case M88E1000_PHY_SPEC_CTRL:
4223 case M88E1000_EXT_PHY_SPEC_CTRL:
4224 if (e1000_phy_reset(&adapter->hw)) {
4225 spin_unlock_irqrestore(
4226 &adapter->stats_lock, flags);
4232 switch (data->reg_num) {
4234 if (mii_reg & MII_CR_POWER_DOWN)
4236 if (netif_running(adapter->netdev)) {
4237 e1000_down(adapter);
4240 e1000_reset(adapter);
4244 spin_unlock_irqrestore(&adapter->stats_lock, flags);
4249 return E1000_SUCCESS;
4253 e1000_pci_set_mwi(struct e1000_hw *hw)
4255 struct e1000_adapter *adapter = hw->back;
4256 int ret_val = pci_set_mwi(adapter->pdev);
4259 DPRINTK(PROBE, ERR, "Error in setting MWI\n");
4263 e1000_pci_clear_mwi(struct e1000_hw *hw)
4265 struct e1000_adapter *adapter = hw->back;
4267 pci_clear_mwi(adapter->pdev);
4271 e1000_read_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4273 struct e1000_adapter *adapter = hw->back;
4275 pci_read_config_word(adapter->pdev, reg, value);
4279 e1000_write_pci_cfg(struct e1000_hw *hw, uint32_t reg, uint16_t *value)
4281 struct e1000_adapter *adapter = hw->back;
4283 pci_write_config_word(adapter->pdev, reg, *value);
4287 e1000_io_read(struct e1000_hw *hw, unsigned long port)
4293 e1000_io_write(struct e1000_hw *hw, unsigned long port, uint32_t value)
4299 e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp)
4301 struct e1000_adapter *adapter = netdev_priv(netdev);
4302 uint32_t ctrl, rctl;
4304 e1000_irq_disable(adapter);
4305 adapter->vlgrp = grp;
4308 /* enable VLAN tag insert/strip */
4309 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4310 ctrl |= E1000_CTRL_VME;
4311 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4313 /* enable VLAN receive filtering */
4314 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4315 rctl |= E1000_RCTL_VFE;
4316 rctl &= ~E1000_RCTL_CFIEN;
4317 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4318 e1000_update_mng_vlan(adapter);
4320 /* disable VLAN tag insert/strip */
4321 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4322 ctrl &= ~E1000_CTRL_VME;
4323 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4325 /* disable VLAN filtering */
4326 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4327 rctl &= ~E1000_RCTL_VFE;
4328 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4329 if (adapter->mng_vlan_id != (uint16_t)E1000_MNG_VLAN_NONE) {
4330 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4331 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4335 e1000_irq_enable(adapter);
4339 e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid)
4341 struct e1000_adapter *adapter = netdev_priv(netdev);
4342 uint32_t vfta, index;
4344 if ((adapter->hw.mng_cookie.status &
4345 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4346 (vid == adapter->mng_vlan_id))
4348 /* add VID to filter table */
4349 index = (vid >> 5) & 0x7F;
4350 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4351 vfta |= (1 << (vid & 0x1F));
4352 e1000_write_vfta(&adapter->hw, index, vfta);
4356 e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid)
4358 struct e1000_adapter *adapter = netdev_priv(netdev);
4359 uint32_t vfta, index;
4361 e1000_irq_disable(adapter);
4364 adapter->vlgrp->vlan_devices[vid] = NULL;
4366 e1000_irq_enable(adapter);
4368 if ((adapter->hw.mng_cookie.status &
4369 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) &&
4370 (vid == adapter->mng_vlan_id)) {
4371 /* release control to f/w */
4372 e1000_release_hw_control(adapter);
4376 /* remove VID from filter table */
4377 index = (vid >> 5) & 0x7F;
4378 vfta = E1000_READ_REG_ARRAY(&adapter->hw, VFTA, index);
4379 vfta &= ~(1 << (vid & 0x1F));
4380 e1000_write_vfta(&adapter->hw, index, vfta);
4384 e1000_restore_vlan(struct e1000_adapter *adapter)
4386 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
4388 if (adapter->vlgrp) {
4390 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
4391 if (!adapter->vlgrp->vlan_devices[vid])
4393 e1000_vlan_rx_add_vid(adapter->netdev, vid);
4399 e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx)
4401 adapter->hw.autoneg = 0;
4403 /* Fiber NICs only allow 1000 gbps Full duplex */
4404 if ((adapter->hw.media_type == e1000_media_type_fiber) &&
4405 spddplx != (SPEED_1000 + DUPLEX_FULL)) {
4406 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4411 case SPEED_10 + DUPLEX_HALF:
4412 adapter->hw.forced_speed_duplex = e1000_10_half;
4414 case SPEED_10 + DUPLEX_FULL:
4415 adapter->hw.forced_speed_duplex = e1000_10_full;
4417 case SPEED_100 + DUPLEX_HALF:
4418 adapter->hw.forced_speed_duplex = e1000_100_half;
4420 case SPEED_100 + DUPLEX_FULL:
4421 adapter->hw.forced_speed_duplex = e1000_100_full;
4423 case SPEED_1000 + DUPLEX_FULL:
4424 adapter->hw.autoneg = 1;
4425 adapter->hw.autoneg_advertised = ADVERTISE_1000_FULL;
4427 case SPEED_1000 + DUPLEX_HALF: /* not supported */
4429 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n");
4436 /* these functions save and restore 16 or 64 dwords (64-256 bytes) of config
4437 * space versus the 64 bytes that pci_[save|restore]_state handle
4439 #define PCIE_CONFIG_SPACE_LEN 256
4440 #define PCI_CONFIG_SPACE_LEN 64
4442 e1000_pci_save_state(struct e1000_adapter *adapter)
4444 struct pci_dev *dev = adapter->pdev;
4447 if (adapter->hw.mac_type >= e1000_82571)
4448 size = PCIE_CONFIG_SPACE_LEN;
4450 size = PCI_CONFIG_SPACE_LEN;
4452 WARN_ON(adapter->config_space != NULL);
4454 adapter->config_space = kmalloc(size, GFP_KERNEL);
4455 if (!adapter->config_space) {
4456 DPRINTK(PROBE, ERR, "unable to allocate %d bytes\n", size);
4459 for (i = 0; i < (size / 4); i++)
4460 pci_read_config_dword(dev, i * 4, &adapter->config_space[i]);
4465 e1000_pci_restore_state(struct e1000_adapter *adapter)
4467 struct pci_dev *dev = adapter->pdev;
4470 if (adapter->config_space == NULL)
4472 if (adapter->hw.mac_type >= e1000_82571)
4473 size = PCIE_CONFIG_SPACE_LEN;
4475 size = PCI_CONFIG_SPACE_LEN;
4476 for (i = 0; i < (size / 4); i++)
4477 pci_write_config_dword(dev, i * 4, adapter->config_space[i]);
4478 kfree(adapter->config_space);
4479 adapter->config_space = NULL;
4482 #endif /* CONFIG_PM */
4485 e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4487 struct net_device *netdev = pci_get_drvdata(pdev);
4488 struct e1000_adapter *adapter = netdev_priv(netdev);
4489 uint32_t ctrl, ctrl_ext, rctl, manc, status;
4490 uint32_t wufc = adapter->wol;
4493 netif_device_detach(netdev);
4495 if (netif_running(netdev))
4496 e1000_down(adapter);
4499 /* implement our own version of pci_save_state(pdev) because pci
4500 * express adapters have larger 256 byte config spaces */
4501 retval = e1000_pci_save_state(adapter);
4506 status = E1000_READ_REG(&adapter->hw, STATUS);
4507 if (status & E1000_STATUS_LU)
4508 wufc &= ~E1000_WUFC_LNKC;
4511 e1000_setup_rctl(adapter);
4512 e1000_set_multi(netdev);
4514 /* turn on all-multi mode if wake on multicast is enabled */
4515 if (adapter->wol & E1000_WUFC_MC) {
4516 rctl = E1000_READ_REG(&adapter->hw, RCTL);
4517 rctl |= E1000_RCTL_MPE;
4518 E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
4521 if (adapter->hw.mac_type >= e1000_82540) {
4522 ctrl = E1000_READ_REG(&adapter->hw, CTRL);
4523 /* advertise wake from D3Cold */
4524 #define E1000_CTRL_ADVD3WUC 0x00100000
4525 /* phy power management enable */
4526 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4527 ctrl |= E1000_CTRL_ADVD3WUC |
4528 E1000_CTRL_EN_PHY_PWR_MGMT;
4529 E1000_WRITE_REG(&adapter->hw, CTRL, ctrl);
4532 if (adapter->hw.media_type == e1000_media_type_fiber ||
4533 adapter->hw.media_type == e1000_media_type_internal_serdes) {
4534 /* keep the laser running in D3 */
4535 ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
4536 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4537 E1000_WRITE_REG(&adapter->hw, CTRL_EXT, ctrl_ext);
4540 /* Allow time for pending master requests to run */
4541 e1000_disable_pciex_master(&adapter->hw);
4543 E1000_WRITE_REG(&adapter->hw, WUC, E1000_WUC_PME_EN);
4544 E1000_WRITE_REG(&adapter->hw, WUFC, wufc);
4545 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4547 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4548 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4550 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4552 E1000_WRITE_REG(&adapter->hw, WUC, 0);
4553 E1000_WRITE_REG(&adapter->hw, WUFC, 0);
4554 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4556 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4557 retval = pci_enable_wake(pdev, PCI_D3cold, 0); /* 4 == D3 cold */
4559 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4562 if (adapter->hw.mac_type >= e1000_82540 &&
4563 adapter->hw.media_type == e1000_media_type_copper) {
4564 manc = E1000_READ_REG(&adapter->hw, MANC);
4565 if (manc & E1000_MANC_SMBUS_EN) {
4566 manc |= E1000_MANC_ARP_EN;
4567 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4568 retval = pci_enable_wake(pdev, PCI_D3hot, 1);
4570 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4571 retval = pci_enable_wake(pdev, PCI_D3cold, 1);
4573 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4577 /* Release control of h/w to f/w. If f/w is AMT enabled, this
4578 * would have already happened in close and is redundant. */
4579 e1000_release_hw_control(adapter);
4581 pci_disable_device(pdev);
4583 retval = pci_set_power_state(pdev, pci_choose_state(pdev, state));
4585 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4592 e1000_resume(struct pci_dev *pdev)
4594 struct net_device *netdev = pci_get_drvdata(pdev);
4595 struct e1000_adapter *adapter = netdev_priv(netdev);
4597 uint32_t manc, ret_val;
4599 retval = pci_set_power_state(pdev, PCI_D0);
4601 DPRINTK(PROBE, ERR, "Error in setting power state\n");
4602 e1000_pci_restore_state(adapter);
4603 ret_val = pci_enable_device(pdev);
4604 pci_set_master(pdev);
4606 retval = pci_enable_wake(pdev, PCI_D3hot, 0);
4608 DPRINTK(PROBE, ERR, "Error enabling D3 wake\n");
4609 retval = pci_enable_wake(pdev, PCI_D3cold, 0);
4611 DPRINTK(PROBE, ERR, "Error enabling D3 cold wake\n");
4613 e1000_reset(adapter);
4614 E1000_WRITE_REG(&adapter->hw, WUS, ~0);
4616 if (netif_running(netdev))
4619 netif_device_attach(netdev);
4621 if (adapter->hw.mac_type >= e1000_82540 &&
4622 adapter->hw.media_type == e1000_media_type_copper) {
4623 manc = E1000_READ_REG(&adapter->hw, MANC);
4624 manc &= ~(E1000_MANC_ARP_EN);
4625 E1000_WRITE_REG(&adapter->hw, MANC, manc);
4628 /* If the controller is 82573 and f/w is AMT, do not set
4629 * DRV_LOAD until the interface is up. For all other cases,
4630 * let the f/w know that the h/w is now under the control
4632 if (adapter->hw.mac_type != e1000_82573 ||
4633 !e1000_check_mng_mode(&adapter->hw))
4634 e1000_get_hw_control(adapter);
4639 #ifdef CONFIG_NET_POLL_CONTROLLER
4641 * Polling 'interrupt' - used by things like netconsole to send skbs
4642 * without having to re-enable interrupts. It's not called while
4643 * the interrupt routine is executing.
4646 e1000_netpoll(struct net_device *netdev)
4648 struct e1000_adapter *adapter = netdev_priv(netdev);
4649 disable_irq(adapter->pdev->irq);
4650 e1000_intr(adapter->pdev->irq, netdev, NULL);
4651 e1000_clean_tx_irq(adapter, adapter->tx_ring);
4652 #ifndef CONFIG_E1000_NAPI
4653 adapter->clean_rx(adapter, adapter->rx_ring);
4655 enable_irq(adapter->pdev->irq);