1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
36 char e1000_driver_name
[] = "e1000";
37 static char e1000_driver_string
[] = "Intel(R) PRO/1000 Network Driver";
38 #define DRV_VERSION "7.3.21-k8-NAPI"
39 const char e1000_driver_version
[] = DRV_VERSION
;
40 static const char e1000_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
42 /* e1000_pci_tbl - PCI Device ID Table
44 * Last entry must be all 0s
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 static const struct pci_device_id e1000_pci_tbl
[] = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
91 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
93 int e1000_up(struct e1000_adapter
*adapter
);
94 void e1000_down(struct e1000_adapter
*adapter
);
95 void e1000_reinit_locked(struct e1000_adapter
*adapter
);
96 void e1000_reset(struct e1000_adapter
*adapter
);
97 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
);
98 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
);
99 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
);
100 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
);
101 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
102 struct e1000_tx_ring
*txdr
);
103 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
104 struct e1000_rx_ring
*rxdr
);
105 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
106 struct e1000_tx_ring
*tx_ring
);
107 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
108 struct e1000_rx_ring
*rx_ring
);
109 void e1000_update_stats(struct e1000_adapter
*adapter
);
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
114 static void e1000_remove(struct pci_dev
*pdev
);
115 static int e1000_alloc_queues(struct e1000_adapter
*adapter
);
116 static int e1000_sw_init(struct e1000_adapter
*adapter
);
117 static int e1000_open(struct net_device
*netdev
);
118 static int e1000_close(struct net_device
*netdev
);
119 static void e1000_configure_tx(struct e1000_adapter
*adapter
);
120 static void e1000_configure_rx(struct e1000_adapter
*adapter
);
121 static void e1000_setup_rctl(struct e1000_adapter
*adapter
);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
);
124 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
125 struct e1000_tx_ring
*tx_ring
);
126 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
127 struct e1000_rx_ring
*rx_ring
);
128 static void e1000_set_rx_mode(struct net_device
*netdev
);
129 static void e1000_update_phy_info_task(struct work_struct
*work
);
130 static void e1000_watchdog(struct work_struct
*work
);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
);
132 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
133 struct net_device
*netdev
);
134 static struct net_device_stats
* e1000_get_stats(struct net_device
*netdev
);
135 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
);
136 static int e1000_set_mac(struct net_device
*netdev
, void *p
);
137 static irqreturn_t
e1000_intr(int irq
, void *data
);
138 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
139 struct e1000_tx_ring
*tx_ring
);
140 static int e1000_clean(struct napi_struct
*napi
, int budget
);
141 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
142 struct e1000_rx_ring
*rx_ring
,
143 int *work_done
, int work_to_do
);
144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
145 struct e1000_rx_ring
*rx_ring
,
146 int *work_done
, int work_to_do
);
147 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
148 struct e1000_rx_ring
*rx_ring
,
150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
151 struct e1000_rx_ring
*rx_ring
,
153 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
);
154 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
156 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
);
157 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
);
158 static void e1000_tx_timeout(struct net_device
*dev
);
159 static void e1000_reset_task(struct work_struct
*work
);
160 static void e1000_smartspeed(struct e1000_adapter
*adapter
);
161 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
162 struct sk_buff
*skb
);
164 static bool e1000_vlan_used(struct e1000_adapter
*adapter
);
165 static void e1000_vlan_mode(struct net_device
*netdev
,
166 netdev_features_t features
);
167 static void e1000_vlan_filter_on_off(struct e1000_adapter
*adapter
,
169 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
,
170 __be16 proto
, u16 vid
);
171 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
,
172 __be16 proto
, u16 vid
);
173 static void e1000_restore_vlan(struct e1000_adapter
*adapter
);
176 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
);
177 static int e1000_resume(struct pci_dev
*pdev
);
179 static void e1000_shutdown(struct pci_dev
*pdev
);
181 #ifdef CONFIG_NET_POLL_CONTROLLER
182 /* for netdump / net console */
183 static void e1000_netpoll (struct net_device
*netdev
);
186 #define COPYBREAK_DEFAULT 256
187 static unsigned int copybreak __read_mostly
= COPYBREAK_DEFAULT
;
188 module_param(copybreak
, uint
, 0644);
189 MODULE_PARM_DESC(copybreak
,
190 "Maximum size of packet that is copied to a new buffer on receive");
192 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
193 pci_channel_state_t state
);
194 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
);
195 static void e1000_io_resume(struct pci_dev
*pdev
);
197 static const struct pci_error_handlers e1000_err_handler
= {
198 .error_detected
= e1000_io_error_detected
,
199 .slot_reset
= e1000_io_slot_reset
,
200 .resume
= e1000_io_resume
,
203 static struct pci_driver e1000_driver
= {
204 .name
= e1000_driver_name
,
205 .id_table
= e1000_pci_tbl
,
206 .probe
= e1000_probe
,
207 .remove
= e1000_remove
,
209 /* Power Management Hooks */
210 .suspend
= e1000_suspend
,
211 .resume
= e1000_resume
,
213 .shutdown
= e1000_shutdown
,
214 .err_handler
= &e1000_err_handler
217 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
218 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
219 MODULE_LICENSE("GPL");
220 MODULE_VERSION(DRV_VERSION
);
222 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
223 static int debug
= -1;
224 module_param(debug
, int, 0);
225 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
228 * e1000_get_hw_dev - return device
229 * used by hardware layer to print debugging information
232 struct net_device
*e1000_get_hw_dev(struct e1000_hw
*hw
)
234 struct e1000_adapter
*adapter
= hw
->back
;
235 return adapter
->netdev
;
239 * e1000_init_module - Driver Registration Routine
241 * e1000_init_module is the first routine called when the driver is
242 * loaded. All it does is register with the PCI subsystem.
244 static int __init
e1000_init_module(void)
247 pr_info("%s - version %s\n", e1000_driver_string
, e1000_driver_version
);
249 pr_info("%s\n", e1000_copyright
);
251 ret
= pci_register_driver(&e1000_driver
);
252 if (copybreak
!= COPYBREAK_DEFAULT
) {
254 pr_info("copybreak disabled\n");
256 pr_info("copybreak enabled for "
257 "packets <= %u bytes\n", copybreak
);
262 module_init(e1000_init_module
);
265 * e1000_exit_module - Driver Exit Cleanup Routine
267 * e1000_exit_module is called just before the driver is removed
270 static void __exit
e1000_exit_module(void)
272 pci_unregister_driver(&e1000_driver
);
275 module_exit(e1000_exit_module
);
277 static int e1000_request_irq(struct e1000_adapter
*adapter
)
279 struct net_device
*netdev
= adapter
->netdev
;
280 irq_handler_t handler
= e1000_intr
;
281 int irq_flags
= IRQF_SHARED
;
284 err
= request_irq(adapter
->pdev
->irq
, handler
, irq_flags
, netdev
->name
,
287 e_err(probe
, "Unable to allocate interrupt Error: %d\n", err
);
293 static void e1000_free_irq(struct e1000_adapter
*adapter
)
295 struct net_device
*netdev
= adapter
->netdev
;
297 free_irq(adapter
->pdev
->irq
, netdev
);
301 * e1000_irq_disable - Mask off interrupt generation on the NIC
302 * @adapter: board private structure
304 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
306 struct e1000_hw
*hw
= &adapter
->hw
;
310 synchronize_irq(adapter
->pdev
->irq
);
314 * e1000_irq_enable - Enable default interrupt generation settings
315 * @adapter: board private structure
317 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
319 struct e1000_hw
*hw
= &adapter
->hw
;
321 ew32(IMS
, IMS_ENABLE_MASK
);
325 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
327 struct e1000_hw
*hw
= &adapter
->hw
;
328 struct net_device
*netdev
= adapter
->netdev
;
329 u16 vid
= hw
->mng_cookie
.vlan_id
;
330 u16 old_vid
= adapter
->mng_vlan_id
;
332 if (!e1000_vlan_used(adapter
))
335 if (!test_bit(vid
, adapter
->active_vlans
)) {
336 if (hw
->mng_cookie
.status
&
337 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) {
338 e1000_vlan_rx_add_vid(netdev
, htons(ETH_P_8021Q
), vid
);
339 adapter
->mng_vlan_id
= vid
;
341 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
343 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
345 !test_bit(old_vid
, adapter
->active_vlans
))
346 e1000_vlan_rx_kill_vid(netdev
, htons(ETH_P_8021Q
),
349 adapter
->mng_vlan_id
= vid
;
353 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
355 struct e1000_hw
*hw
= &adapter
->hw
;
357 if (adapter
->en_mng_pt
) {
358 u32 manc
= er32(MANC
);
360 /* disable hardware interception of ARP */
361 manc
&= ~(E1000_MANC_ARP_EN
);
367 static void e1000_release_manageability(struct e1000_adapter
*adapter
)
369 struct e1000_hw
*hw
= &adapter
->hw
;
371 if (adapter
->en_mng_pt
) {
372 u32 manc
= er32(MANC
);
374 /* re-enable hardware interception of ARP */
375 manc
|= E1000_MANC_ARP_EN
;
382 * e1000_configure - configure the hardware for RX and TX
383 * @adapter = private board structure
385 static void e1000_configure(struct e1000_adapter
*adapter
)
387 struct net_device
*netdev
= adapter
->netdev
;
390 e1000_set_rx_mode(netdev
);
392 e1000_restore_vlan(adapter
);
393 e1000_init_manageability(adapter
);
395 e1000_configure_tx(adapter
);
396 e1000_setup_rctl(adapter
);
397 e1000_configure_rx(adapter
);
398 /* call E1000_DESC_UNUSED which always leaves
399 * at least 1 descriptor unused to make sure
400 * next_to_use != next_to_clean
402 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
403 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[i
];
404 adapter
->alloc_rx_buf(adapter
, ring
,
405 E1000_DESC_UNUSED(ring
));
409 int e1000_up(struct e1000_adapter
*adapter
)
411 struct e1000_hw
*hw
= &adapter
->hw
;
413 /* hardware has been reset, we need to reload some things */
414 e1000_configure(adapter
);
416 clear_bit(__E1000_DOWN
, &adapter
->flags
);
418 napi_enable(&adapter
->napi
);
420 e1000_irq_enable(adapter
);
422 netif_wake_queue(adapter
->netdev
);
424 /* fire a link change interrupt to start the watchdog */
425 ew32(ICS
, E1000_ICS_LSC
);
430 * e1000_power_up_phy - restore link in case the phy was powered down
431 * @adapter: address of board private structure
433 * The phy may be powered down to save power and turn off link when the
434 * driver is unloaded and wake on lan is not enabled (among others)
435 * *** this routine MUST be followed by a call to e1000_reset ***
437 void e1000_power_up_phy(struct e1000_adapter
*adapter
)
439 struct e1000_hw
*hw
= &adapter
->hw
;
442 /* Just clear the power down bit to wake the phy back up */
443 if (hw
->media_type
== e1000_media_type_copper
) {
444 /* according to the manual, the phy will retain its
445 * settings across a power-down/up cycle
447 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
448 mii_reg
&= ~MII_CR_POWER_DOWN
;
449 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
453 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
455 struct e1000_hw
*hw
= &adapter
->hw
;
457 /* Power down the PHY so no link is implied when interface is down *
458 * The PHY cannot be powered down if any of the following is true *
461 * (c) SoL/IDER session is active
463 if (!adapter
->wol
&& hw
->mac_type
>= e1000_82540
&&
464 hw
->media_type
== e1000_media_type_copper
) {
467 switch (hw
->mac_type
) {
470 case e1000_82545_rev_3
:
473 case e1000_82546_rev_3
:
475 case e1000_82541_rev_2
:
477 case e1000_82547_rev_2
:
478 if (er32(MANC
) & E1000_MANC_SMBUS_EN
)
484 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
485 mii_reg
|= MII_CR_POWER_DOWN
;
486 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
493 static void e1000_down_and_stop(struct e1000_adapter
*adapter
)
495 set_bit(__E1000_DOWN
, &adapter
->flags
);
497 cancel_delayed_work_sync(&adapter
->watchdog_task
);
500 * Since the watchdog task can reschedule other tasks, we should cancel
501 * it first, otherwise we can run into the situation when a work is
502 * still running after the adapter has been turned down.
505 cancel_delayed_work_sync(&adapter
->phy_info_task
);
506 cancel_delayed_work_sync(&adapter
->fifo_stall_task
);
508 /* Only kill reset task if adapter is not resetting */
509 if (!test_bit(__E1000_RESETTING
, &adapter
->flags
))
510 cancel_work_sync(&adapter
->reset_task
);
513 void e1000_down(struct e1000_adapter
*adapter
)
515 struct e1000_hw
*hw
= &adapter
->hw
;
516 struct net_device
*netdev
= adapter
->netdev
;
520 /* disable receives in the hardware */
522 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
523 /* flush and sleep below */
525 netif_tx_disable(netdev
);
527 /* disable transmits in the hardware */
529 tctl
&= ~E1000_TCTL_EN
;
531 /* flush both disables and wait for them to finish */
535 napi_disable(&adapter
->napi
);
537 e1000_irq_disable(adapter
);
539 /* Setting DOWN must be after irq_disable to prevent
540 * a screaming interrupt. Setting DOWN also prevents
541 * tasks from rescheduling.
543 e1000_down_and_stop(adapter
);
545 adapter
->link_speed
= 0;
546 adapter
->link_duplex
= 0;
547 netif_carrier_off(netdev
);
549 e1000_reset(adapter
);
550 e1000_clean_all_tx_rings(adapter
);
551 e1000_clean_all_rx_rings(adapter
);
554 void e1000_reinit_locked(struct e1000_adapter
*adapter
)
556 WARN_ON(in_interrupt());
557 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
561 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
564 void e1000_reset(struct e1000_adapter
*adapter
)
566 struct e1000_hw
*hw
= &adapter
->hw
;
567 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
568 bool legacy_pba_adjust
= false;
571 /* Repartition Pba for greater than 9k mtu
572 * To take effect CTRL.RST is required.
575 switch (hw
->mac_type
) {
576 case e1000_82542_rev2_0
:
577 case e1000_82542_rev2_1
:
582 case e1000_82541_rev_2
:
583 legacy_pba_adjust
= true;
587 case e1000_82545_rev_3
:
590 case e1000_82546_rev_3
:
594 case e1000_82547_rev_2
:
595 legacy_pba_adjust
= true;
598 case e1000_undefined
:
603 if (legacy_pba_adjust
) {
604 if (hw
->max_frame_size
> E1000_RXBUFFER_8192
)
605 pba
-= 8; /* allocate more FIFO for Tx */
607 if (hw
->mac_type
== e1000_82547
) {
608 adapter
->tx_fifo_head
= 0;
609 adapter
->tx_head_addr
= pba
<< E1000_TX_HEAD_ADDR_SHIFT
;
610 adapter
->tx_fifo_size
=
611 (E1000_PBA_40K
- pba
) << E1000_PBA_BYTES_SHIFT
;
612 atomic_set(&adapter
->tx_fifo_stall
, 0);
614 } else if (hw
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
615 /* adjust PBA for jumbo frames */
618 /* To maintain wire speed transmits, the Tx FIFO should be
619 * large enough to accommodate two full transmit packets,
620 * rounded up to the next 1KB and expressed in KB. Likewise,
621 * the Rx FIFO should be large enough to accommodate at least
622 * one full receive packet and is similarly rounded up and
626 /* upper 16 bits has Tx packet buffer allocation size in KB */
627 tx_space
= pba
>> 16;
628 /* lower 16 bits has Rx packet buffer allocation size in KB */
630 /* the Tx fifo also stores 16 bytes of information about the Tx
631 * but don't include ethernet FCS because hardware appends it
633 min_tx_space
= (hw
->max_frame_size
+
634 sizeof(struct e1000_tx_desc
) -
636 min_tx_space
= ALIGN(min_tx_space
, 1024);
638 /* software strips receive CRC, so leave room for it */
639 min_rx_space
= hw
->max_frame_size
;
640 min_rx_space
= ALIGN(min_rx_space
, 1024);
643 /* If current Tx allocation is less than the min Tx FIFO size,
644 * and the min Tx FIFO size is less than the current Rx FIFO
645 * allocation, take space away from current Rx allocation
647 if (tx_space
< min_tx_space
&&
648 ((min_tx_space
- tx_space
) < pba
)) {
649 pba
= pba
- (min_tx_space
- tx_space
);
651 /* PCI/PCIx hardware has PBA alignment constraints */
652 switch (hw
->mac_type
) {
653 case e1000_82545
... e1000_82546_rev_3
:
654 pba
&= ~(E1000_PBA_8K
- 1);
660 /* if short on Rx space, Rx wins and must trump Tx
661 * adjustment or use Early Receive if available
663 if (pba
< min_rx_space
)
670 /* flow control settings:
671 * The high water mark must be low enough to fit one full frame
672 * (or the size used for early receive) above it in the Rx FIFO.
673 * Set it to the lower of:
674 * - 90% of the Rx FIFO size, and
675 * - the full Rx FIFO size minus the early receive size (for parts
676 * with ERT support assuming ERT set to E1000_ERT_2048), or
677 * - the full Rx FIFO size minus one full frame
679 hwm
= min(((pba
<< 10) * 9 / 10),
680 ((pba
<< 10) - hw
->max_frame_size
));
682 hw
->fc_high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
683 hw
->fc_low_water
= hw
->fc_high_water
- 8;
684 hw
->fc_pause_time
= E1000_FC_PAUSE_TIME
;
686 hw
->fc
= hw
->original_fc
;
688 /* Allow time for pending master requests to run */
690 if (hw
->mac_type
>= e1000_82544
)
693 if (e1000_init_hw(hw
))
694 e_dev_err("Hardware Error\n");
695 e1000_update_mng_vlan(adapter
);
697 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
698 if (hw
->mac_type
>= e1000_82544
&&
700 hw
->autoneg_advertised
== ADVERTISE_1000_FULL
) {
701 u32 ctrl
= er32(CTRL
);
702 /* clear phy power management bit if we are in gig only mode,
703 * which if enabled will attempt negotiation to 100Mb, which
704 * can cause a loss of link at power off or driver unload
706 ctrl
&= ~E1000_CTRL_SWDPIN3
;
710 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
711 ew32(VET
, ETHERNET_IEEE_VLAN_TYPE
);
713 e1000_reset_adaptive(hw
);
714 e1000_phy_get_info(hw
, &adapter
->phy_info
);
716 e1000_release_manageability(adapter
);
719 /* Dump the eeprom for users having checksum issues */
720 static void e1000_dump_eeprom(struct e1000_adapter
*adapter
)
722 struct net_device
*netdev
= adapter
->netdev
;
723 struct ethtool_eeprom eeprom
;
724 const struct ethtool_ops
*ops
= netdev
->ethtool_ops
;
727 u16 csum_old
, csum_new
= 0;
729 eeprom
.len
= ops
->get_eeprom_len(netdev
);
732 data
= kmalloc(eeprom
.len
, GFP_KERNEL
);
736 ops
->get_eeprom(netdev
, &eeprom
, data
);
738 csum_old
= (data
[EEPROM_CHECKSUM_REG
* 2]) +
739 (data
[EEPROM_CHECKSUM_REG
* 2 + 1] << 8);
740 for (i
= 0; i
< EEPROM_CHECKSUM_REG
* 2; i
+= 2)
741 csum_new
+= data
[i
] + (data
[i
+ 1] << 8);
742 csum_new
= EEPROM_SUM
- csum_new
;
744 pr_err("/*********************/\n");
745 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old
);
746 pr_err("Calculated : 0x%04x\n", csum_new
);
748 pr_err("Offset Values\n");
749 pr_err("======== ======\n");
750 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 16, 1, data
, 128, 0);
752 pr_err("Include this output when contacting your support provider.\n");
753 pr_err("This is not a software error! Something bad happened to\n");
754 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
755 pr_err("result in further problems, possibly loss of data,\n");
756 pr_err("corruption or system hangs!\n");
757 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
758 pr_err("which is invalid and requires you to set the proper MAC\n");
759 pr_err("address manually before continuing to enable this network\n");
760 pr_err("device. Please inspect the EEPROM dump and report the\n");
761 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
762 pr_err("/*********************/\n");
768 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
769 * @pdev: PCI device information struct
771 * Return true if an adapter needs ioport resources
773 static int e1000_is_need_ioport(struct pci_dev
*pdev
)
775 switch (pdev
->device
) {
776 case E1000_DEV_ID_82540EM
:
777 case E1000_DEV_ID_82540EM_LOM
:
778 case E1000_DEV_ID_82540EP
:
779 case E1000_DEV_ID_82540EP_LOM
:
780 case E1000_DEV_ID_82540EP_LP
:
781 case E1000_DEV_ID_82541EI
:
782 case E1000_DEV_ID_82541EI_MOBILE
:
783 case E1000_DEV_ID_82541ER
:
784 case E1000_DEV_ID_82541ER_LOM
:
785 case E1000_DEV_ID_82541GI
:
786 case E1000_DEV_ID_82541GI_LF
:
787 case E1000_DEV_ID_82541GI_MOBILE
:
788 case E1000_DEV_ID_82544EI_COPPER
:
789 case E1000_DEV_ID_82544EI_FIBER
:
790 case E1000_DEV_ID_82544GC_COPPER
:
791 case E1000_DEV_ID_82544GC_LOM
:
792 case E1000_DEV_ID_82545EM_COPPER
:
793 case E1000_DEV_ID_82545EM_FIBER
:
794 case E1000_DEV_ID_82546EB_COPPER
:
795 case E1000_DEV_ID_82546EB_FIBER
:
796 case E1000_DEV_ID_82546EB_QUAD_COPPER
:
803 static netdev_features_t
e1000_fix_features(struct net_device
*netdev
,
804 netdev_features_t features
)
806 /* Since there is no support for separate Rx/Tx vlan accel
807 * enable/disable make sure Tx flag is always in same state as Rx.
809 if (features
& NETIF_F_HW_VLAN_CTAG_RX
)
810 features
|= NETIF_F_HW_VLAN_CTAG_TX
;
812 features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
817 static int e1000_set_features(struct net_device
*netdev
,
818 netdev_features_t features
)
820 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
821 netdev_features_t changed
= features
^ netdev
->features
;
823 if (changed
& NETIF_F_HW_VLAN_CTAG_RX
)
824 e1000_vlan_mode(netdev
, features
);
826 if (!(changed
& (NETIF_F_RXCSUM
| NETIF_F_RXALL
)))
829 netdev
->features
= features
;
830 adapter
->rx_csum
= !!(features
& NETIF_F_RXCSUM
);
832 if (netif_running(netdev
))
833 e1000_reinit_locked(adapter
);
835 e1000_reset(adapter
);
840 static const struct net_device_ops e1000_netdev_ops
= {
841 .ndo_open
= e1000_open
,
842 .ndo_stop
= e1000_close
,
843 .ndo_start_xmit
= e1000_xmit_frame
,
844 .ndo_get_stats
= e1000_get_stats
,
845 .ndo_set_rx_mode
= e1000_set_rx_mode
,
846 .ndo_set_mac_address
= e1000_set_mac
,
847 .ndo_tx_timeout
= e1000_tx_timeout
,
848 .ndo_change_mtu
= e1000_change_mtu
,
849 .ndo_do_ioctl
= e1000_ioctl
,
850 .ndo_validate_addr
= eth_validate_addr
,
851 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
852 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
853 #ifdef CONFIG_NET_POLL_CONTROLLER
854 .ndo_poll_controller
= e1000_netpoll
,
856 .ndo_fix_features
= e1000_fix_features
,
857 .ndo_set_features
= e1000_set_features
,
861 * e1000_init_hw_struct - initialize members of hw struct
862 * @adapter: board private struct
863 * @hw: structure used by e1000_hw.c
865 * Factors out initialization of the e1000_hw struct to its own function
866 * that can be called very early at init (just after struct allocation).
867 * Fields are initialized based on PCI device information and
868 * OS network device settings (MTU size).
869 * Returns negative error codes if MAC type setup fails.
871 static int e1000_init_hw_struct(struct e1000_adapter
*adapter
,
874 struct pci_dev
*pdev
= adapter
->pdev
;
876 /* PCI config space info */
877 hw
->vendor_id
= pdev
->vendor
;
878 hw
->device_id
= pdev
->device
;
879 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
880 hw
->subsystem_id
= pdev
->subsystem_device
;
881 hw
->revision_id
= pdev
->revision
;
883 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->pci_cmd_word
);
885 hw
->max_frame_size
= adapter
->netdev
->mtu
+
886 ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
887 hw
->min_frame_size
= MINIMUM_ETHERNET_FRAME_SIZE
;
889 /* identify the MAC */
890 if (e1000_set_mac_type(hw
)) {
891 e_err(probe
, "Unknown MAC Type\n");
895 switch (hw
->mac_type
) {
900 case e1000_82541_rev_2
:
901 case e1000_82547_rev_2
:
902 hw
->phy_init_script
= 1;
906 e1000_set_media_type(hw
);
907 e1000_get_bus_info(hw
);
909 hw
->wait_autoneg_complete
= false;
910 hw
->tbi_compatibility_en
= true;
911 hw
->adaptive_ifs
= true;
915 if (hw
->media_type
== e1000_media_type_copper
) {
916 hw
->mdix
= AUTO_ALL_MODES
;
917 hw
->disable_polarity_correction
= false;
918 hw
->master_slave
= E1000_MASTER_SLAVE
;
925 * e1000_probe - Device Initialization Routine
926 * @pdev: PCI device information struct
927 * @ent: entry in e1000_pci_tbl
929 * Returns 0 on success, negative on failure
931 * e1000_probe initializes an adapter identified by a pci_dev structure.
932 * The OS initialization, configuring of the adapter private structure,
933 * and a hardware reset occur.
935 static int e1000_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
937 struct net_device
*netdev
;
938 struct e1000_adapter
*adapter
;
941 static int cards_found
= 0;
942 static int global_quad_port_a
= 0; /* global ksp3 port a indication */
943 int i
, err
, pci_using_dac
;
946 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
947 int bars
, need_ioport
;
949 /* do not allocate ioport bars when not needed */
950 need_ioport
= e1000_is_need_ioport(pdev
);
952 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
953 err
= pci_enable_device(pdev
);
955 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
956 err
= pci_enable_device_mem(pdev
);
961 err
= pci_request_selected_regions(pdev
, bars
, e1000_driver_name
);
965 pci_set_master(pdev
);
966 err
= pci_save_state(pdev
);
968 goto err_alloc_etherdev
;
971 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
973 goto err_alloc_etherdev
;
975 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
977 pci_set_drvdata(pdev
, netdev
);
978 adapter
= netdev_priv(netdev
);
979 adapter
->netdev
= netdev
;
980 adapter
->pdev
= pdev
;
981 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
982 adapter
->bars
= bars
;
983 adapter
->need_ioport
= need_ioport
;
989 hw
->hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
993 if (adapter
->need_ioport
) {
994 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
995 if (pci_resource_len(pdev
, i
) == 0)
997 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
998 hw
->io_base
= pci_resource_start(pdev
, i
);
1004 /* make ready for any if (hw->...) below */
1005 err
= e1000_init_hw_struct(adapter
, hw
);
1009 /* there is a workaround being applied below that limits
1010 * 64-bit DMA addresses to 64-bit hardware. There are some
1011 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1014 if ((hw
->bus_type
== e1000_bus_type_pcix
) &&
1015 !dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(64))) {
1018 err
= dma_set_mask_and_coherent(&pdev
->dev
, DMA_BIT_MASK(32));
1020 pr_err("No usable DMA config, aborting\n");
1025 netdev
->netdev_ops
= &e1000_netdev_ops
;
1026 e1000_set_ethtool_ops(netdev
);
1027 netdev
->watchdog_timeo
= 5 * HZ
;
1028 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
1030 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
1032 adapter
->bd_number
= cards_found
;
1034 /* setup the private structure */
1036 err
= e1000_sw_init(adapter
);
1041 if (hw
->mac_type
== e1000_ce4100
) {
1042 hw
->ce4100_gbe_mdio_base_virt
=
1043 ioremap(pci_resource_start(pdev
, BAR_1
),
1044 pci_resource_len(pdev
, BAR_1
));
1046 if (!hw
->ce4100_gbe_mdio_base_virt
)
1047 goto err_mdio_ioremap
;
1050 if (hw
->mac_type
>= e1000_82543
) {
1051 netdev
->hw_features
= NETIF_F_SG
|
1053 NETIF_F_HW_VLAN_CTAG_RX
;
1054 netdev
->features
= NETIF_F_HW_VLAN_CTAG_TX
|
1055 NETIF_F_HW_VLAN_CTAG_FILTER
;
1058 if ((hw
->mac_type
>= e1000_82544
) &&
1059 (hw
->mac_type
!= e1000_82547
))
1060 netdev
->hw_features
|= NETIF_F_TSO
;
1062 netdev
->priv_flags
|= IFF_SUPP_NOFCS
;
1064 netdev
->features
|= netdev
->hw_features
;
1065 netdev
->hw_features
|= (NETIF_F_RXCSUM
|
1069 if (pci_using_dac
) {
1070 netdev
->features
|= NETIF_F_HIGHDMA
;
1071 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
1074 netdev
->vlan_features
|= (NETIF_F_TSO
|
1078 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
1080 adapter
->en_mng_pt
= e1000_enable_mng_pass_thru(hw
);
1082 /* initialize eeprom parameters */
1083 if (e1000_init_eeprom_params(hw
)) {
1084 e_err(probe
, "EEPROM initialization failed\n");
1088 /* before reading the EEPROM, reset the controller to
1089 * put the device in a known good starting state
1094 /* make sure the EEPROM is good */
1095 if (e1000_validate_eeprom_checksum(hw
) < 0) {
1096 e_err(probe
, "The EEPROM Checksum Is Not Valid\n");
1097 e1000_dump_eeprom(adapter
);
1098 /* set MAC address to all zeroes to invalidate and temporary
1099 * disable this device for the user. This blocks regular
1100 * traffic while still permitting ethtool ioctls from reaching
1101 * the hardware as well as allowing the user to run the
1102 * interface after manually setting a hw addr using
1105 memset(hw
->mac_addr
, 0, netdev
->addr_len
);
1107 /* copy the MAC address out of the EEPROM */
1108 if (e1000_read_mac_addr(hw
))
1109 e_err(probe
, "EEPROM Read Error\n");
1111 /* don't block initalization here due to bad MAC address */
1112 memcpy(netdev
->dev_addr
, hw
->mac_addr
, netdev
->addr_len
);
1114 if (!is_valid_ether_addr(netdev
->dev_addr
))
1115 e_err(probe
, "Invalid MAC Address\n");
1118 INIT_DELAYED_WORK(&adapter
->watchdog_task
, e1000_watchdog
);
1119 INIT_DELAYED_WORK(&adapter
->fifo_stall_task
,
1120 e1000_82547_tx_fifo_stall_task
);
1121 INIT_DELAYED_WORK(&adapter
->phy_info_task
, e1000_update_phy_info_task
);
1122 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
1124 e1000_check_options(adapter
);
1126 /* Initial Wake on LAN setting
1127 * If APM wake is enabled in the EEPROM,
1128 * enable the ACPI Magic Packet filter
1131 switch (hw
->mac_type
) {
1132 case e1000_82542_rev2_0
:
1133 case e1000_82542_rev2_1
:
1137 e1000_read_eeprom(hw
,
1138 EEPROM_INIT_CONTROL2_REG
, 1, &eeprom_data
);
1139 eeprom_apme_mask
= E1000_EEPROM_82544_APM
;
1142 case e1000_82546_rev_3
:
1143 if (er32(STATUS
) & E1000_STATUS_FUNC_1
){
1144 e1000_read_eeprom(hw
,
1145 EEPROM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
1150 e1000_read_eeprom(hw
,
1151 EEPROM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1154 if (eeprom_data
& eeprom_apme_mask
)
1155 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1157 /* now that we have the eeprom settings, apply the special cases
1158 * where the eeprom may be wrong or the board simply won't support
1159 * wake on lan on a particular port
1161 switch (pdev
->device
) {
1162 case E1000_DEV_ID_82546GB_PCIE
:
1163 adapter
->eeprom_wol
= 0;
1165 case E1000_DEV_ID_82546EB_FIBER
:
1166 case E1000_DEV_ID_82546GB_FIBER
:
1167 /* Wake events only supported on port A for dual fiber
1168 * regardless of eeprom setting
1170 if (er32(STATUS
) & E1000_STATUS_FUNC_1
)
1171 adapter
->eeprom_wol
= 0;
1173 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3
:
1174 /* if quad port adapter, disable WoL on all but port A */
1175 if (global_quad_port_a
!= 0)
1176 adapter
->eeprom_wol
= 0;
1178 adapter
->quad_port_a
= true;
1179 /* Reset for multiple quad port adapters */
1180 if (++global_quad_port_a
== 4)
1181 global_quad_port_a
= 0;
1185 /* initialize the wol settings based on the eeprom settings */
1186 adapter
->wol
= adapter
->eeprom_wol
;
1187 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1189 /* Auto detect PHY address */
1190 if (hw
->mac_type
== e1000_ce4100
) {
1191 for (i
= 0; i
< 32; i
++) {
1193 e1000_read_phy_reg(hw
, PHY_ID2
, &tmp
);
1194 if (tmp
== 0 || tmp
== 0xFF) {
1203 /* reset the hardware with the new settings */
1204 e1000_reset(adapter
);
1206 strcpy(netdev
->name
, "eth%d");
1207 err
= register_netdev(netdev
);
1211 e1000_vlan_filter_on_off(adapter
, false);
1213 /* print bus type/speed/width info */
1214 e_info(probe
, "(PCI%s:%dMHz:%d-bit) %pM\n",
1215 ((hw
->bus_type
== e1000_bus_type_pcix
) ? "-X" : ""),
1216 ((hw
->bus_speed
== e1000_bus_speed_133
) ? 133 :
1217 (hw
->bus_speed
== e1000_bus_speed_120
) ? 120 :
1218 (hw
->bus_speed
== e1000_bus_speed_100
) ? 100 :
1219 (hw
->bus_speed
== e1000_bus_speed_66
) ? 66 : 33),
1220 ((hw
->bus_width
== e1000_bus_width_64
) ? 64 : 32),
1223 /* carrier off reporting is important to ethtool even BEFORE open */
1224 netif_carrier_off(netdev
);
1226 e_info(probe
, "Intel(R) PRO/1000 Network Connection\n");
1233 e1000_phy_hw_reset(hw
);
1235 if (hw
->flash_address
)
1236 iounmap(hw
->flash_address
);
1237 kfree(adapter
->tx_ring
);
1238 kfree(adapter
->rx_ring
);
1242 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1243 iounmap(hw
->hw_addr
);
1245 free_netdev(netdev
);
1247 pci_release_selected_regions(pdev
, bars
);
1249 pci_disable_device(pdev
);
1254 * e1000_remove - Device Removal Routine
1255 * @pdev: PCI device information struct
1257 * e1000_remove is called by the PCI subsystem to alert the driver
1258 * that it should release a PCI device. The could be caused by a
1259 * Hot-Plug event, or because the driver is going to be removed from
1262 static void e1000_remove(struct pci_dev
*pdev
)
1264 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1265 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1266 struct e1000_hw
*hw
= &adapter
->hw
;
1268 e1000_down_and_stop(adapter
);
1269 e1000_release_manageability(adapter
);
1271 unregister_netdev(netdev
);
1273 e1000_phy_hw_reset(hw
);
1275 kfree(adapter
->tx_ring
);
1276 kfree(adapter
->rx_ring
);
1278 if (hw
->mac_type
== e1000_ce4100
)
1279 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1280 iounmap(hw
->hw_addr
);
1281 if (hw
->flash_address
)
1282 iounmap(hw
->flash_address
);
1283 pci_release_selected_regions(pdev
, adapter
->bars
);
1285 free_netdev(netdev
);
1287 pci_disable_device(pdev
);
1291 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1292 * @adapter: board private structure to initialize
1294 * e1000_sw_init initializes the Adapter private data structure.
1295 * e1000_init_hw_struct MUST be called before this function
1297 static int e1000_sw_init(struct e1000_adapter
*adapter
)
1299 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1301 adapter
->num_tx_queues
= 1;
1302 adapter
->num_rx_queues
= 1;
1304 if (e1000_alloc_queues(adapter
)) {
1305 e_err(probe
, "Unable to allocate memory for queues\n");
1309 /* Explicitly disable IRQ since the NIC can be in any state. */
1310 e1000_irq_disable(adapter
);
1312 spin_lock_init(&adapter
->stats_lock
);
1314 set_bit(__E1000_DOWN
, &adapter
->flags
);
1320 * e1000_alloc_queues - Allocate memory for all rings
1321 * @adapter: board private structure to initialize
1323 * We allocate one ring per queue at run-time since we don't know the
1324 * number of queues at compile-time.
1326 static int e1000_alloc_queues(struct e1000_adapter
*adapter
)
1328 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
1329 sizeof(struct e1000_tx_ring
), GFP_KERNEL
);
1330 if (!adapter
->tx_ring
)
1333 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
1334 sizeof(struct e1000_rx_ring
), GFP_KERNEL
);
1335 if (!adapter
->rx_ring
) {
1336 kfree(adapter
->tx_ring
);
1340 return E1000_SUCCESS
;
1344 * e1000_open - Called when a network interface is made active
1345 * @netdev: network interface device structure
1347 * Returns 0 on success, negative value on failure
1349 * The open entry point is called when a network interface is made
1350 * active by the system (IFF_UP). At this point all resources needed
1351 * for transmit and receive operations are allocated, the interrupt
1352 * handler is registered with the OS, the watchdog task is started,
1353 * and the stack is notified that the interface is ready.
1355 static int e1000_open(struct net_device
*netdev
)
1357 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1358 struct e1000_hw
*hw
= &adapter
->hw
;
1361 /* disallow open during test */
1362 if (test_bit(__E1000_TESTING
, &adapter
->flags
))
1365 netif_carrier_off(netdev
);
1367 /* allocate transmit descriptors */
1368 err
= e1000_setup_all_tx_resources(adapter
);
1372 /* allocate receive descriptors */
1373 err
= e1000_setup_all_rx_resources(adapter
);
1377 e1000_power_up_phy(adapter
);
1379 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
1380 if ((hw
->mng_cookie
.status
&
1381 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
)) {
1382 e1000_update_mng_vlan(adapter
);
1385 /* before we allocate an interrupt, we must be ready to handle it.
1386 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1387 * as soon as we call pci_request_irq, so we have to setup our
1388 * clean_rx handler before we do so.
1390 e1000_configure(adapter
);
1392 err
= e1000_request_irq(adapter
);
1396 /* From here on the code is the same as e1000_up() */
1397 clear_bit(__E1000_DOWN
, &adapter
->flags
);
1399 napi_enable(&adapter
->napi
);
1401 e1000_irq_enable(adapter
);
1403 netif_start_queue(netdev
);
1405 /* fire a link status change interrupt to start the watchdog */
1406 ew32(ICS
, E1000_ICS_LSC
);
1408 return E1000_SUCCESS
;
1411 e1000_power_down_phy(adapter
);
1412 e1000_free_all_rx_resources(adapter
);
1414 e1000_free_all_tx_resources(adapter
);
1416 e1000_reset(adapter
);
1422 * e1000_close - Disables a network interface
1423 * @netdev: network interface device structure
1425 * Returns 0, this is not allowed to fail
1427 * The close entry point is called when an interface is de-activated
1428 * by the OS. The hardware is still under the drivers control, but
1429 * needs to be disabled. A global MAC reset is issued to stop the
1430 * hardware, and all transmit and receive resources are freed.
1432 static int e1000_close(struct net_device
*netdev
)
1434 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1435 struct e1000_hw
*hw
= &adapter
->hw
;
1436 int count
= E1000_CHECK_RESET_COUNT
;
1438 while (test_bit(__E1000_RESETTING
, &adapter
->flags
) && count
--)
1439 usleep_range(10000, 20000);
1441 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
1442 e1000_down(adapter
);
1443 e1000_power_down_phy(adapter
);
1444 e1000_free_irq(adapter
);
1446 e1000_free_all_tx_resources(adapter
);
1447 e1000_free_all_rx_resources(adapter
);
1449 /* kill manageability vlan ID if supported, but not if a vlan with
1450 * the same ID is registered on the host OS (let 8021q kill it)
1452 if ((hw
->mng_cookie
.status
&
1453 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
1454 !test_bit(adapter
->mng_vlan_id
, adapter
->active_vlans
)) {
1455 e1000_vlan_rx_kill_vid(netdev
, htons(ETH_P_8021Q
),
1456 adapter
->mng_vlan_id
);
1463 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1464 * @adapter: address of board private structure
1465 * @start: address of beginning of memory
1466 * @len: length of memory
1468 static bool e1000_check_64k_bound(struct e1000_adapter
*adapter
, void *start
,
1471 struct e1000_hw
*hw
= &adapter
->hw
;
1472 unsigned long begin
= (unsigned long)start
;
1473 unsigned long end
= begin
+ len
;
1475 /* First rev 82545 and 82546 need to not allow any memory
1476 * write location to cross 64k boundary due to errata 23
1478 if (hw
->mac_type
== e1000_82545
||
1479 hw
->mac_type
== e1000_ce4100
||
1480 hw
->mac_type
== e1000_82546
) {
1481 return ((begin
^ (end
- 1)) >> 16) != 0 ? false : true;
1488 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1489 * @adapter: board private structure
1490 * @txdr: tx descriptor ring (for a specific queue) to setup
1492 * Return 0 on success, negative on failure
1494 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
1495 struct e1000_tx_ring
*txdr
)
1497 struct pci_dev
*pdev
= adapter
->pdev
;
1500 size
= sizeof(struct e1000_buffer
) * txdr
->count
;
1501 txdr
->buffer_info
= vzalloc(size
);
1502 if (!txdr
->buffer_info
)
1505 /* round up to nearest 4K */
1507 txdr
->size
= txdr
->count
* sizeof(struct e1000_tx_desc
);
1508 txdr
->size
= ALIGN(txdr
->size
, 4096);
1510 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
1514 vfree(txdr
->buffer_info
);
1518 /* Fix for errata 23, can't cross 64kB boundary */
1519 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1520 void *olddesc
= txdr
->desc
;
1521 dma_addr_t olddma
= txdr
->dma
;
1522 e_err(tx_err
, "txdr align check failed: %u bytes at %p\n",
1523 txdr
->size
, txdr
->desc
);
1524 /* Try again, without freeing the previous */
1525 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
,
1526 &txdr
->dma
, GFP_KERNEL
);
1527 /* Failed allocation, critical failure */
1529 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1531 goto setup_tx_desc_die
;
1534 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1536 dma_free_coherent(&pdev
->dev
, txdr
->size
, txdr
->desc
,
1538 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1540 e_err(probe
, "Unable to allocate aligned memory "
1541 "for the transmit descriptor ring\n");
1542 vfree(txdr
->buffer_info
);
1545 /* Free old allocation, new allocation was successful */
1546 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1550 memset(txdr
->desc
, 0, txdr
->size
);
1552 txdr
->next_to_use
= 0;
1553 txdr
->next_to_clean
= 0;
1559 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1560 * (Descriptors) for all queues
1561 * @adapter: board private structure
1563 * Return 0 on success, negative on failure
1565 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
)
1569 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1570 err
= e1000_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1572 e_err(probe
, "Allocation for Tx Queue %u failed\n", i
);
1573 for (i
-- ; i
>= 0; i
--)
1574 e1000_free_tx_resources(adapter
,
1575 &adapter
->tx_ring
[i
]);
1584 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1585 * @adapter: board private structure
1587 * Configure the Tx unit of the MAC after a reset.
1589 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
1592 struct e1000_hw
*hw
= &adapter
->hw
;
1593 u32 tdlen
, tctl
, tipg
;
1596 /* Setup the HW Tx Head and Tail descriptor pointers */
1598 switch (adapter
->num_tx_queues
) {
1601 tdba
= adapter
->tx_ring
[0].dma
;
1602 tdlen
= adapter
->tx_ring
[0].count
*
1603 sizeof(struct e1000_tx_desc
);
1605 ew32(TDBAH
, (tdba
>> 32));
1606 ew32(TDBAL
, (tdba
& 0x00000000ffffffffULL
));
1609 adapter
->tx_ring
[0].tdh
= ((hw
->mac_type
>= e1000_82543
) ?
1610 E1000_TDH
: E1000_82542_TDH
);
1611 adapter
->tx_ring
[0].tdt
= ((hw
->mac_type
>= e1000_82543
) ?
1612 E1000_TDT
: E1000_82542_TDT
);
1616 /* Set the default values for the Tx Inter Packet Gap timer */
1617 if ((hw
->media_type
== e1000_media_type_fiber
||
1618 hw
->media_type
== e1000_media_type_internal_serdes
))
1619 tipg
= DEFAULT_82543_TIPG_IPGT_FIBER
;
1621 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
;
1623 switch (hw
->mac_type
) {
1624 case e1000_82542_rev2_0
:
1625 case e1000_82542_rev2_1
:
1626 tipg
= DEFAULT_82542_TIPG_IPGT
;
1627 ipgr1
= DEFAULT_82542_TIPG_IPGR1
;
1628 ipgr2
= DEFAULT_82542_TIPG_IPGR2
;
1631 ipgr1
= DEFAULT_82543_TIPG_IPGR1
;
1632 ipgr2
= DEFAULT_82543_TIPG_IPGR2
;
1635 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
1636 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
1639 /* Set the Tx Interrupt Delay register */
1641 ew32(TIDV
, adapter
->tx_int_delay
);
1642 if (hw
->mac_type
>= e1000_82540
)
1643 ew32(TADV
, adapter
->tx_abs_int_delay
);
1645 /* Program the Transmit Control Register */
1648 tctl
&= ~E1000_TCTL_CT
;
1649 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1650 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1652 e1000_config_collision_dist(hw
);
1654 /* Setup Transmit Descriptor Settings for eop descriptor */
1655 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
1657 /* only set IDE if we are delaying interrupts using the timers */
1658 if (adapter
->tx_int_delay
)
1659 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
1661 if (hw
->mac_type
< e1000_82543
)
1662 adapter
->txd_cmd
|= E1000_TXD_CMD_RPS
;
1664 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
1666 /* Cache if we're 82544 running in PCI-X because we'll
1667 * need this to apply a workaround later in the send path.
1669 if (hw
->mac_type
== e1000_82544
&&
1670 hw
->bus_type
== e1000_bus_type_pcix
)
1671 adapter
->pcix_82544
= true;
1678 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1679 * @adapter: board private structure
1680 * @rxdr: rx descriptor ring (for a specific queue) to setup
1682 * Returns 0 on success, negative on failure
1684 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
1685 struct e1000_rx_ring
*rxdr
)
1687 struct pci_dev
*pdev
= adapter
->pdev
;
1690 size
= sizeof(struct e1000_buffer
) * rxdr
->count
;
1691 rxdr
->buffer_info
= vzalloc(size
);
1692 if (!rxdr
->buffer_info
)
1695 desc_len
= sizeof(struct e1000_rx_desc
);
1697 /* Round up to nearest 4K */
1699 rxdr
->size
= rxdr
->count
* desc_len
;
1700 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
1702 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
1706 vfree(rxdr
->buffer_info
);
1710 /* Fix for errata 23, can't cross 64kB boundary */
1711 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1712 void *olddesc
= rxdr
->desc
;
1713 dma_addr_t olddma
= rxdr
->dma
;
1714 e_err(rx_err
, "rxdr align check failed: %u bytes at %p\n",
1715 rxdr
->size
, rxdr
->desc
);
1716 /* Try again, without freeing the previous */
1717 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
,
1718 &rxdr
->dma
, GFP_KERNEL
);
1719 /* Failed allocation, critical failure */
1721 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1723 goto setup_rx_desc_die
;
1726 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1728 dma_free_coherent(&pdev
->dev
, rxdr
->size
, rxdr
->desc
,
1730 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1732 e_err(probe
, "Unable to allocate aligned memory for "
1733 "the Rx descriptor ring\n");
1734 goto setup_rx_desc_die
;
1736 /* Free old allocation, new allocation was successful */
1737 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1741 memset(rxdr
->desc
, 0, rxdr
->size
);
1743 rxdr
->next_to_clean
= 0;
1744 rxdr
->next_to_use
= 0;
1745 rxdr
->rx_skb_top
= NULL
;
1751 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1752 * (Descriptors) for all queues
1753 * @adapter: board private structure
1755 * Return 0 on success, negative on failure
1757 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
)
1761 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1762 err
= e1000_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1764 e_err(probe
, "Allocation for Rx Queue %u failed\n", i
);
1765 for (i
-- ; i
>= 0; i
--)
1766 e1000_free_rx_resources(adapter
,
1767 &adapter
->rx_ring
[i
]);
1776 * e1000_setup_rctl - configure the receive control registers
1777 * @adapter: Board private structure
1779 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
1781 struct e1000_hw
*hw
= &adapter
->hw
;
1786 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1788 rctl
|= E1000_RCTL_BAM
| E1000_RCTL_LBM_NO
|
1789 E1000_RCTL_RDMTS_HALF
|
1790 (hw
->mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1792 if (hw
->tbi_compatibility_on
== 1)
1793 rctl
|= E1000_RCTL_SBP
;
1795 rctl
&= ~E1000_RCTL_SBP
;
1797 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1798 rctl
&= ~E1000_RCTL_LPE
;
1800 rctl
|= E1000_RCTL_LPE
;
1802 /* Setup buffer sizes */
1803 rctl
&= ~E1000_RCTL_SZ_4096
;
1804 rctl
|= E1000_RCTL_BSEX
;
1805 switch (adapter
->rx_buffer_len
) {
1806 case E1000_RXBUFFER_2048
:
1808 rctl
|= E1000_RCTL_SZ_2048
;
1809 rctl
&= ~E1000_RCTL_BSEX
;
1811 case E1000_RXBUFFER_4096
:
1812 rctl
|= E1000_RCTL_SZ_4096
;
1814 case E1000_RXBUFFER_8192
:
1815 rctl
|= E1000_RCTL_SZ_8192
;
1817 case E1000_RXBUFFER_16384
:
1818 rctl
|= E1000_RCTL_SZ_16384
;
1822 /* This is useful for sniffing bad packets. */
1823 if (adapter
->netdev
->features
& NETIF_F_RXALL
) {
1824 /* UPE and MPE will be handled by normal PROMISC logic
1825 * in e1000e_set_rx_mode
1827 rctl
|= (E1000_RCTL_SBP
| /* Receive bad packets */
1828 E1000_RCTL_BAM
| /* RX All Bcast Pkts */
1829 E1000_RCTL_PMCF
); /* RX All MAC Ctrl Pkts */
1831 rctl
&= ~(E1000_RCTL_VFE
| /* Disable VLAN filter */
1832 E1000_RCTL_DPF
| /* Allow filtered pause */
1833 E1000_RCTL_CFIEN
); /* Dis VLAN CFIEN Filter */
1834 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1835 * and that breaks VLANs.
1843 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1844 * @adapter: board private structure
1846 * Configure the Rx unit of the MAC after a reset.
1848 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
1851 struct e1000_hw
*hw
= &adapter
->hw
;
1852 u32 rdlen
, rctl
, rxcsum
;
1854 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1855 rdlen
= adapter
->rx_ring
[0].count
*
1856 sizeof(struct e1000_rx_desc
);
1857 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
1858 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
1860 rdlen
= adapter
->rx_ring
[0].count
*
1861 sizeof(struct e1000_rx_desc
);
1862 adapter
->clean_rx
= e1000_clean_rx_irq
;
1863 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
1866 /* disable receives while setting up the descriptors */
1868 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1870 /* set the Receive Delay Timer Register */
1871 ew32(RDTR
, adapter
->rx_int_delay
);
1873 if (hw
->mac_type
>= e1000_82540
) {
1874 ew32(RADV
, adapter
->rx_abs_int_delay
);
1875 if (adapter
->itr_setting
!= 0)
1876 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
1879 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1880 * the Base and Length of the Rx Descriptor Ring
1882 switch (adapter
->num_rx_queues
) {
1885 rdba
= adapter
->rx_ring
[0].dma
;
1887 ew32(RDBAH
, (rdba
>> 32));
1888 ew32(RDBAL
, (rdba
& 0x00000000ffffffffULL
));
1891 adapter
->rx_ring
[0].rdh
= ((hw
->mac_type
>= e1000_82543
) ?
1892 E1000_RDH
: E1000_82542_RDH
);
1893 adapter
->rx_ring
[0].rdt
= ((hw
->mac_type
>= e1000_82543
) ?
1894 E1000_RDT
: E1000_82542_RDT
);
1898 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1899 if (hw
->mac_type
>= e1000_82543
) {
1900 rxcsum
= er32(RXCSUM
);
1901 if (adapter
->rx_csum
)
1902 rxcsum
|= E1000_RXCSUM_TUOFL
;
1904 /* don't need to clear IPPCSE as it defaults to 0 */
1905 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1906 ew32(RXCSUM
, rxcsum
);
1909 /* Enable Receives */
1910 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
1914 * e1000_free_tx_resources - Free Tx Resources per Queue
1915 * @adapter: board private structure
1916 * @tx_ring: Tx descriptor ring for a specific queue
1918 * Free all transmit software resources
1920 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
1921 struct e1000_tx_ring
*tx_ring
)
1923 struct pci_dev
*pdev
= adapter
->pdev
;
1925 e1000_clean_tx_ring(adapter
, tx_ring
);
1927 vfree(tx_ring
->buffer_info
);
1928 tx_ring
->buffer_info
= NULL
;
1930 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1933 tx_ring
->desc
= NULL
;
1937 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1938 * @adapter: board private structure
1940 * Free all transmit software resources
1942 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
)
1946 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1947 e1000_free_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1950 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter
*adapter
,
1951 struct e1000_buffer
*buffer_info
)
1953 if (buffer_info
->dma
) {
1954 if (buffer_info
->mapped_as_page
)
1955 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1956 buffer_info
->length
, DMA_TO_DEVICE
);
1958 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1959 buffer_info
->length
,
1961 buffer_info
->dma
= 0;
1963 if (buffer_info
->skb
) {
1964 dev_kfree_skb_any(buffer_info
->skb
);
1965 buffer_info
->skb
= NULL
;
1967 buffer_info
->time_stamp
= 0;
1968 /* buffer_info must be completely set up in the transmit path */
1972 * e1000_clean_tx_ring - Free Tx Buffers
1973 * @adapter: board private structure
1974 * @tx_ring: ring to be cleaned
1976 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
1977 struct e1000_tx_ring
*tx_ring
)
1979 struct e1000_hw
*hw
= &adapter
->hw
;
1980 struct e1000_buffer
*buffer_info
;
1984 /* Free all the Tx ring sk_buffs */
1986 for (i
= 0; i
< tx_ring
->count
; i
++) {
1987 buffer_info
= &tx_ring
->buffer_info
[i
];
1988 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
1991 netdev_reset_queue(adapter
->netdev
);
1992 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1993 memset(tx_ring
->buffer_info
, 0, size
);
1995 /* Zero out the descriptor ring */
1997 memset(tx_ring
->desc
, 0, tx_ring
->size
);
1999 tx_ring
->next_to_use
= 0;
2000 tx_ring
->next_to_clean
= 0;
2001 tx_ring
->last_tx_tso
= false;
2003 writel(0, hw
->hw_addr
+ tx_ring
->tdh
);
2004 writel(0, hw
->hw_addr
+ tx_ring
->tdt
);
2008 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2009 * @adapter: board private structure
2011 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
)
2015 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2016 e1000_clean_tx_ring(adapter
, &adapter
->tx_ring
[i
]);
2020 * e1000_free_rx_resources - Free Rx Resources
2021 * @adapter: board private structure
2022 * @rx_ring: ring to clean the resources from
2024 * Free all receive software resources
2026 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
2027 struct e1000_rx_ring
*rx_ring
)
2029 struct pci_dev
*pdev
= adapter
->pdev
;
2031 e1000_clean_rx_ring(adapter
, rx_ring
);
2033 vfree(rx_ring
->buffer_info
);
2034 rx_ring
->buffer_info
= NULL
;
2036 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
2039 rx_ring
->desc
= NULL
;
2043 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2044 * @adapter: board private structure
2046 * Free all receive software resources
2048 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
)
2052 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2053 e1000_free_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
2057 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2058 * @adapter: board private structure
2059 * @rx_ring: ring to free buffers from
2061 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
2062 struct e1000_rx_ring
*rx_ring
)
2064 struct e1000_hw
*hw
= &adapter
->hw
;
2065 struct e1000_buffer
*buffer_info
;
2066 struct pci_dev
*pdev
= adapter
->pdev
;
2070 /* Free all the Rx ring sk_buffs */
2071 for (i
= 0; i
< rx_ring
->count
; i
++) {
2072 buffer_info
= &rx_ring
->buffer_info
[i
];
2073 if (buffer_info
->dma
&&
2074 adapter
->clean_rx
== e1000_clean_rx_irq
) {
2075 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
2076 buffer_info
->length
,
2078 } else if (buffer_info
->dma
&&
2079 adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
) {
2080 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
2081 buffer_info
->length
,
2085 buffer_info
->dma
= 0;
2086 if (buffer_info
->page
) {
2087 put_page(buffer_info
->page
);
2088 buffer_info
->page
= NULL
;
2090 if (buffer_info
->skb
) {
2091 dev_kfree_skb(buffer_info
->skb
);
2092 buffer_info
->skb
= NULL
;
2096 /* there also may be some cached data from a chained receive */
2097 if (rx_ring
->rx_skb_top
) {
2098 dev_kfree_skb(rx_ring
->rx_skb_top
);
2099 rx_ring
->rx_skb_top
= NULL
;
2102 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
2103 memset(rx_ring
->buffer_info
, 0, size
);
2105 /* Zero out the descriptor ring */
2106 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2108 rx_ring
->next_to_clean
= 0;
2109 rx_ring
->next_to_use
= 0;
2111 writel(0, hw
->hw_addr
+ rx_ring
->rdh
);
2112 writel(0, hw
->hw_addr
+ rx_ring
->rdt
);
2116 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2117 * @adapter: board private structure
2119 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
)
2123 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2124 e1000_clean_rx_ring(adapter
, &adapter
->rx_ring
[i
]);
2127 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2128 * and memory write and invalidate disabled for certain operations
2130 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
)
2132 struct e1000_hw
*hw
= &adapter
->hw
;
2133 struct net_device
*netdev
= adapter
->netdev
;
2136 e1000_pci_clear_mwi(hw
);
2139 rctl
|= E1000_RCTL_RST
;
2141 E1000_WRITE_FLUSH();
2144 if (netif_running(netdev
))
2145 e1000_clean_all_rx_rings(adapter
);
2148 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
)
2150 struct e1000_hw
*hw
= &adapter
->hw
;
2151 struct net_device
*netdev
= adapter
->netdev
;
2155 rctl
&= ~E1000_RCTL_RST
;
2157 E1000_WRITE_FLUSH();
2160 if (hw
->pci_cmd_word
& PCI_COMMAND_INVALIDATE
)
2161 e1000_pci_set_mwi(hw
);
2163 if (netif_running(netdev
)) {
2164 /* No need to loop, because 82542 supports only 1 queue */
2165 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[0];
2166 e1000_configure_rx(adapter
);
2167 adapter
->alloc_rx_buf(adapter
, ring
, E1000_DESC_UNUSED(ring
));
2172 * e1000_set_mac - Change the Ethernet Address of the NIC
2173 * @netdev: network interface device structure
2174 * @p: pointer to an address structure
2176 * Returns 0 on success, negative on failure
2178 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
2180 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2181 struct e1000_hw
*hw
= &adapter
->hw
;
2182 struct sockaddr
*addr
= p
;
2184 if (!is_valid_ether_addr(addr
->sa_data
))
2185 return -EADDRNOTAVAIL
;
2187 /* 82542 2.0 needs to be in reset to write receive address registers */
2189 if (hw
->mac_type
== e1000_82542_rev2_0
)
2190 e1000_enter_82542_rst(adapter
);
2192 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2193 memcpy(hw
->mac_addr
, addr
->sa_data
, netdev
->addr_len
);
2195 e1000_rar_set(hw
, hw
->mac_addr
, 0);
2197 if (hw
->mac_type
== e1000_82542_rev2_0
)
2198 e1000_leave_82542_rst(adapter
);
2204 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2205 * @netdev: network interface device structure
2207 * The set_rx_mode entry point is called whenever the unicast or multicast
2208 * address lists or the network interface flags are updated. This routine is
2209 * responsible for configuring the hardware for proper unicast, multicast,
2210 * promiscuous mode, and all-multi behavior.
2212 static void e1000_set_rx_mode(struct net_device
*netdev
)
2214 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2215 struct e1000_hw
*hw
= &adapter
->hw
;
2216 struct netdev_hw_addr
*ha
;
2217 bool use_uc
= false;
2220 int i
, rar_entries
= E1000_RAR_ENTRIES
;
2221 int mta_reg_count
= E1000_NUM_MTA_REGISTERS
;
2222 u32
*mcarray
= kcalloc(mta_reg_count
, sizeof(u32
), GFP_ATOMIC
);
2227 /* Check for Promiscuous and All Multicast modes */
2231 if (netdev
->flags
& IFF_PROMISC
) {
2232 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2233 rctl
&= ~E1000_RCTL_VFE
;
2235 if (netdev
->flags
& IFF_ALLMULTI
)
2236 rctl
|= E1000_RCTL_MPE
;
2238 rctl
&= ~E1000_RCTL_MPE
;
2239 /* Enable VLAN filter if there is a VLAN */
2240 if (e1000_vlan_used(adapter
))
2241 rctl
|= E1000_RCTL_VFE
;
2244 if (netdev_uc_count(netdev
) > rar_entries
- 1) {
2245 rctl
|= E1000_RCTL_UPE
;
2246 } else if (!(netdev
->flags
& IFF_PROMISC
)) {
2247 rctl
&= ~E1000_RCTL_UPE
;
2253 /* 82542 2.0 needs to be in reset to write receive address registers */
2255 if (hw
->mac_type
== e1000_82542_rev2_0
)
2256 e1000_enter_82542_rst(adapter
);
2258 /* load the first 14 addresses into the exact filters 1-14. Unicast
2259 * addresses take precedence to avoid disabling unicast filtering
2262 * RAR 0 is used for the station MAC address
2263 * if there are not 14 addresses, go ahead and clear the filters
2267 netdev_for_each_uc_addr(ha
, netdev
) {
2268 if (i
== rar_entries
)
2270 e1000_rar_set(hw
, ha
->addr
, i
++);
2273 netdev_for_each_mc_addr(ha
, netdev
) {
2274 if (i
== rar_entries
) {
2275 /* load any remaining addresses into the hash table */
2276 u32 hash_reg
, hash_bit
, mta
;
2277 hash_value
= e1000_hash_mc_addr(hw
, ha
->addr
);
2278 hash_reg
= (hash_value
>> 5) & 0x7F;
2279 hash_bit
= hash_value
& 0x1F;
2280 mta
= (1 << hash_bit
);
2281 mcarray
[hash_reg
] |= mta
;
2283 e1000_rar_set(hw
, ha
->addr
, i
++);
2287 for (; i
< rar_entries
; i
++) {
2288 E1000_WRITE_REG_ARRAY(hw
, RA
, i
<< 1, 0);
2289 E1000_WRITE_FLUSH();
2290 E1000_WRITE_REG_ARRAY(hw
, RA
, (i
<< 1) + 1, 0);
2291 E1000_WRITE_FLUSH();
2294 /* write the hash table completely, write from bottom to avoid
2295 * both stupid write combining chipsets, and flushing each write
2297 for (i
= mta_reg_count
- 1; i
>= 0 ; i
--) {
2298 /* If we are on an 82544 has an errata where writing odd
2299 * offsets overwrites the previous even offset, but writing
2300 * backwards over the range solves the issue by always
2301 * writing the odd offset first
2303 E1000_WRITE_REG_ARRAY(hw
, MTA
, i
, mcarray
[i
]);
2305 E1000_WRITE_FLUSH();
2307 if (hw
->mac_type
== e1000_82542_rev2_0
)
2308 e1000_leave_82542_rst(adapter
);
2314 * e1000_update_phy_info_task - get phy info
2315 * @work: work struct contained inside adapter struct
2317 * Need to wait a few seconds after link up to get diagnostic information from
2320 static void e1000_update_phy_info_task(struct work_struct
*work
)
2322 struct e1000_adapter
*adapter
= container_of(work
,
2323 struct e1000_adapter
,
2324 phy_info_task
.work
);
2326 e1000_phy_get_info(&adapter
->hw
, &adapter
->phy_info
);
2330 * e1000_82547_tx_fifo_stall_task - task to complete work
2331 * @work: work struct contained inside adapter struct
2333 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
)
2335 struct e1000_adapter
*adapter
= container_of(work
,
2336 struct e1000_adapter
,
2337 fifo_stall_task
.work
);
2338 struct e1000_hw
*hw
= &adapter
->hw
;
2339 struct net_device
*netdev
= adapter
->netdev
;
2342 if (atomic_read(&adapter
->tx_fifo_stall
)) {
2343 if ((er32(TDT
) == er32(TDH
)) &&
2344 (er32(TDFT
) == er32(TDFH
)) &&
2345 (er32(TDFTS
) == er32(TDFHS
))) {
2347 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
2348 ew32(TDFT
, adapter
->tx_head_addr
);
2349 ew32(TDFH
, adapter
->tx_head_addr
);
2350 ew32(TDFTS
, adapter
->tx_head_addr
);
2351 ew32(TDFHS
, adapter
->tx_head_addr
);
2353 E1000_WRITE_FLUSH();
2355 adapter
->tx_fifo_head
= 0;
2356 atomic_set(&adapter
->tx_fifo_stall
, 0);
2357 netif_wake_queue(netdev
);
2358 } else if (!test_bit(__E1000_DOWN
, &adapter
->flags
)) {
2359 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
2364 bool e1000_has_link(struct e1000_adapter
*adapter
)
2366 struct e1000_hw
*hw
= &adapter
->hw
;
2367 bool link_active
= false;
2369 /* get_link_status is set on LSC (link status) interrupt or rx
2370 * sequence error interrupt (except on intel ce4100).
2371 * get_link_status will stay false until the
2372 * e1000_check_for_link establishes link for copper adapters
2375 switch (hw
->media_type
) {
2376 case e1000_media_type_copper
:
2377 if (hw
->mac_type
== e1000_ce4100
)
2378 hw
->get_link_status
= 1;
2379 if (hw
->get_link_status
) {
2380 e1000_check_for_link(hw
);
2381 link_active
= !hw
->get_link_status
;
2386 case e1000_media_type_fiber
:
2387 e1000_check_for_link(hw
);
2388 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
2390 case e1000_media_type_internal_serdes
:
2391 e1000_check_for_link(hw
);
2392 link_active
= hw
->serdes_has_link
;
2402 * e1000_watchdog - work function
2403 * @work: work struct contained inside adapter struct
2405 static void e1000_watchdog(struct work_struct
*work
)
2407 struct e1000_adapter
*adapter
= container_of(work
,
2408 struct e1000_adapter
,
2409 watchdog_task
.work
);
2410 struct e1000_hw
*hw
= &adapter
->hw
;
2411 struct net_device
*netdev
= adapter
->netdev
;
2412 struct e1000_tx_ring
*txdr
= adapter
->tx_ring
;
2415 link
= e1000_has_link(adapter
);
2416 if ((netif_carrier_ok(netdev
)) && link
)
2420 if (!netif_carrier_ok(netdev
)) {
2423 /* update snapshot of PHY registers on LSC */
2424 e1000_get_speed_and_duplex(hw
,
2425 &adapter
->link_speed
,
2426 &adapter
->link_duplex
);
2429 pr_info("%s NIC Link is Up %d Mbps %s, "
2430 "Flow Control: %s\n",
2432 adapter
->link_speed
,
2433 adapter
->link_duplex
== FULL_DUPLEX
?
2434 "Full Duplex" : "Half Duplex",
2435 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2436 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2437 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2438 E1000_CTRL_TFCE
) ? "TX" : "None")));
2440 /* adjust timeout factor according to speed/duplex */
2441 adapter
->tx_timeout_factor
= 1;
2442 switch (adapter
->link_speed
) {
2445 adapter
->tx_timeout_factor
= 16;
2449 /* maybe add some timeout factor ? */
2453 /* enable transmits in the hardware */
2455 tctl
|= E1000_TCTL_EN
;
2458 netif_carrier_on(netdev
);
2459 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2460 schedule_delayed_work(&adapter
->phy_info_task
,
2462 adapter
->smartspeed
= 0;
2465 if (netif_carrier_ok(netdev
)) {
2466 adapter
->link_speed
= 0;
2467 adapter
->link_duplex
= 0;
2468 pr_info("%s NIC Link is Down\n",
2470 netif_carrier_off(netdev
);
2472 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2473 schedule_delayed_work(&adapter
->phy_info_task
,
2477 e1000_smartspeed(adapter
);
2481 e1000_update_stats(adapter
);
2483 hw
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2484 adapter
->tpt_old
= adapter
->stats
.tpt
;
2485 hw
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2486 adapter
->colc_old
= adapter
->stats
.colc
;
2488 adapter
->gorcl
= adapter
->stats
.gorcl
- adapter
->gorcl_old
;
2489 adapter
->gorcl_old
= adapter
->stats
.gorcl
;
2490 adapter
->gotcl
= adapter
->stats
.gotcl
- adapter
->gotcl_old
;
2491 adapter
->gotcl_old
= adapter
->stats
.gotcl
;
2493 e1000_update_adaptive(hw
);
2495 if (!netif_carrier_ok(netdev
)) {
2496 if (E1000_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
2497 /* We've lost link, so the controller stops DMA,
2498 * but we've got queued Tx work that's never going
2499 * to get done, so reset controller to flush Tx.
2500 * (Do the reset outside of interrupt context).
2502 adapter
->tx_timeout_count
++;
2503 schedule_work(&adapter
->reset_task
);
2504 /* exit immediately since reset is imminent */
2509 /* Simple mode for Interrupt Throttle Rate (ITR) */
2510 if (hw
->mac_type
>= e1000_82540
&& adapter
->itr_setting
== 4) {
2511 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2512 * Total asymmetrical Tx or Rx gets ITR=8000;
2513 * everyone else is between 2000-8000.
2515 u32 goc
= (adapter
->gotcl
+ adapter
->gorcl
) / 10000;
2516 u32 dif
= (adapter
->gotcl
> adapter
->gorcl
?
2517 adapter
->gotcl
- adapter
->gorcl
:
2518 adapter
->gorcl
- adapter
->gotcl
) / 10000;
2519 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
2521 ew32(ITR
, 1000000000 / (itr
* 256));
2524 /* Cause software interrupt to ensure rx ring is cleaned */
2525 ew32(ICS
, E1000_ICS_RXDMT0
);
2527 /* Force detection of hung controller every watchdog period */
2528 adapter
->detect_tx_hung
= true;
2530 /* Reschedule the task */
2531 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2532 schedule_delayed_work(&adapter
->watchdog_task
, 2 * HZ
);
2535 enum latency_range
{
2539 latency_invalid
= 255
2543 * e1000_update_itr - update the dynamic ITR value based on statistics
2544 * @adapter: pointer to adapter
2545 * @itr_setting: current adapter->itr
2546 * @packets: the number of packets during this measurement interval
2547 * @bytes: the number of bytes during this measurement interval
2549 * Stores a new ITR value based on packets and byte
2550 * counts during the last interrupt. The advantage of per interrupt
2551 * computation is faster updates and more accurate ITR for the current
2552 * traffic pattern. Constants in this function were computed
2553 * based on theoretical maximum wire speed and thresholds were set based
2554 * on testing data as well as attempting to minimize response time
2555 * while increasing bulk throughput.
2556 * this functionality is controlled by the InterruptThrottleRate module
2557 * parameter (see e1000_param.c)
2559 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2560 u16 itr_setting
, int packets
, int bytes
)
2562 unsigned int retval
= itr_setting
;
2563 struct e1000_hw
*hw
= &adapter
->hw
;
2565 if (unlikely(hw
->mac_type
< e1000_82540
))
2566 goto update_itr_done
;
2569 goto update_itr_done
;
2571 switch (itr_setting
) {
2572 case lowest_latency
:
2573 /* jumbo frames get bulk treatment*/
2574 if (bytes
/packets
> 8000)
2575 retval
= bulk_latency
;
2576 else if ((packets
< 5) && (bytes
> 512))
2577 retval
= low_latency
;
2579 case low_latency
: /* 50 usec aka 20000 ints/s */
2580 if (bytes
> 10000) {
2581 /* jumbo frames need bulk latency setting */
2582 if (bytes
/packets
> 8000)
2583 retval
= bulk_latency
;
2584 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2585 retval
= bulk_latency
;
2586 else if ((packets
> 35))
2587 retval
= lowest_latency
;
2588 } else if (bytes
/packets
> 2000)
2589 retval
= bulk_latency
;
2590 else if (packets
<= 2 && bytes
< 512)
2591 retval
= lowest_latency
;
2593 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2594 if (bytes
> 25000) {
2596 retval
= low_latency
;
2597 } else if (bytes
< 6000) {
2598 retval
= low_latency
;
2607 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2609 struct e1000_hw
*hw
= &adapter
->hw
;
2611 u32 new_itr
= adapter
->itr
;
2613 if (unlikely(hw
->mac_type
< e1000_82540
))
2616 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2617 if (unlikely(adapter
->link_speed
!= SPEED_1000
)) {
2623 adapter
->tx_itr
= e1000_update_itr(adapter
, adapter
->tx_itr
,
2624 adapter
->total_tx_packets
,
2625 adapter
->total_tx_bytes
);
2626 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2627 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2628 adapter
->tx_itr
= low_latency
;
2630 adapter
->rx_itr
= e1000_update_itr(adapter
, adapter
->rx_itr
,
2631 adapter
->total_rx_packets
,
2632 adapter
->total_rx_bytes
);
2633 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2634 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2635 adapter
->rx_itr
= low_latency
;
2637 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2639 switch (current_itr
) {
2640 /* counts and packets in update_itr are dependent on these numbers */
2641 case lowest_latency
:
2645 new_itr
= 20000; /* aka hwitr = ~200 */
2655 if (new_itr
!= adapter
->itr
) {
2656 /* this attempts to bias the interrupt rate towards Bulk
2657 * by adding intermediate steps when interrupt rate is
2660 new_itr
= new_itr
> adapter
->itr
?
2661 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2663 adapter
->itr
= new_itr
;
2664 ew32(ITR
, 1000000000 / (new_itr
* 256));
2668 #define E1000_TX_FLAGS_CSUM 0x00000001
2669 #define E1000_TX_FLAGS_VLAN 0x00000002
2670 #define E1000_TX_FLAGS_TSO 0x00000004
2671 #define E1000_TX_FLAGS_IPV4 0x00000008
2672 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2673 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2674 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2676 static int e1000_tso(struct e1000_adapter
*adapter
,
2677 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
,
2680 struct e1000_context_desc
*context_desc
;
2681 struct e1000_buffer
*buffer_info
;
2684 u16 ipcse
= 0, tucse
, mss
;
2685 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
2687 if (skb_is_gso(skb
)) {
2690 err
= skb_cow_head(skb
, 0);
2694 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2695 mss
= skb_shinfo(skb
)->gso_size
;
2696 if (protocol
== htons(ETH_P_IP
)) {
2697 struct iphdr
*iph
= ip_hdr(skb
);
2700 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2704 cmd_length
= E1000_TXD_CMD_IP
;
2705 ipcse
= skb_transport_offset(skb
) - 1;
2706 } else if (skb_is_gso_v6(skb
)) {
2707 ipv6_hdr(skb
)->payload_len
= 0;
2708 tcp_hdr(skb
)->check
=
2709 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2710 &ipv6_hdr(skb
)->daddr
,
2714 ipcss
= skb_network_offset(skb
);
2715 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
2716 tucss
= skb_transport_offset(skb
);
2717 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
2720 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
2721 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
2723 i
= tx_ring
->next_to_use
;
2724 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2725 buffer_info
= &tx_ring
->buffer_info
[i
];
2727 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
2728 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
2729 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
2730 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
2731 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
2732 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
2733 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
2734 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
2735 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
2737 buffer_info
->time_stamp
= jiffies
;
2738 buffer_info
->next_to_watch
= i
;
2740 if (++i
== tx_ring
->count
) i
= 0;
2741 tx_ring
->next_to_use
= i
;
2748 static bool e1000_tx_csum(struct e1000_adapter
*adapter
,
2749 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
,
2752 struct e1000_context_desc
*context_desc
;
2753 struct e1000_buffer
*buffer_info
;
2756 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
2758 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
2762 case cpu_to_be16(ETH_P_IP
):
2763 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2764 cmd_len
|= E1000_TXD_CMD_TCP
;
2766 case cpu_to_be16(ETH_P_IPV6
):
2767 /* XXX not handling all IPV6 headers */
2768 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2769 cmd_len
|= E1000_TXD_CMD_TCP
;
2772 if (unlikely(net_ratelimit()))
2773 e_warn(drv
, "checksum_partial proto=%x!\n",
2778 css
= skb_checksum_start_offset(skb
);
2780 i
= tx_ring
->next_to_use
;
2781 buffer_info
= &tx_ring
->buffer_info
[i
];
2782 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2784 context_desc
->lower_setup
.ip_config
= 0;
2785 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
2786 context_desc
->upper_setup
.tcp_fields
.tucso
=
2787 css
+ skb
->csum_offset
;
2788 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
2789 context_desc
->tcp_seg_setup
.data
= 0;
2790 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
2792 buffer_info
->time_stamp
= jiffies
;
2793 buffer_info
->next_to_watch
= i
;
2795 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2796 tx_ring
->next_to_use
= i
;
2801 #define E1000_MAX_TXD_PWR 12
2802 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2804 static int e1000_tx_map(struct e1000_adapter
*adapter
,
2805 struct e1000_tx_ring
*tx_ring
,
2806 struct sk_buff
*skb
, unsigned int first
,
2807 unsigned int max_per_txd
, unsigned int nr_frags
,
2810 struct e1000_hw
*hw
= &adapter
->hw
;
2811 struct pci_dev
*pdev
= adapter
->pdev
;
2812 struct e1000_buffer
*buffer_info
;
2813 unsigned int len
= skb_headlen(skb
);
2814 unsigned int offset
= 0, size
, count
= 0, i
;
2815 unsigned int f
, bytecount
, segs
;
2817 i
= tx_ring
->next_to_use
;
2820 buffer_info
= &tx_ring
->buffer_info
[i
];
2821 size
= min(len
, max_per_txd
);
2822 /* Workaround for Controller erratum --
2823 * descriptor for non-tso packet in a linear SKB that follows a
2824 * tso gets written back prematurely before the data is fully
2825 * DMA'd to the controller
2827 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&&
2829 tx_ring
->last_tx_tso
= false;
2833 /* Workaround for premature desc write-backs
2834 * in TSO mode. Append 4-byte sentinel desc
2836 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
2838 /* work-around for errata 10 and it applies
2839 * to all controllers in PCI-X mode
2840 * The fix is to make sure that the first descriptor of a
2841 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2843 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
2844 (size
> 2015) && count
== 0))
2847 /* Workaround for potential 82544 hang in PCI-X. Avoid
2848 * terminating buffers within evenly-aligned dwords.
2850 if (unlikely(adapter
->pcix_82544
&&
2851 !((unsigned long)(skb
->data
+ offset
+ size
- 1) & 4) &&
2855 buffer_info
->length
= size
;
2856 /* set time_stamp *before* dma to help avoid a possible race */
2857 buffer_info
->time_stamp
= jiffies
;
2858 buffer_info
->mapped_as_page
= false;
2859 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2861 size
, DMA_TO_DEVICE
);
2862 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2864 buffer_info
->next_to_watch
= i
;
2871 if (unlikely(i
== tx_ring
->count
))
2876 for (f
= 0; f
< nr_frags
; f
++) {
2877 const struct skb_frag_struct
*frag
;
2879 frag
= &skb_shinfo(skb
)->frags
[f
];
2880 len
= skb_frag_size(frag
);
2884 unsigned long bufend
;
2886 if (unlikely(i
== tx_ring
->count
))
2889 buffer_info
= &tx_ring
->buffer_info
[i
];
2890 size
= min(len
, max_per_txd
);
2891 /* Workaround for premature desc write-backs
2892 * in TSO mode. Append 4-byte sentinel desc
2894 if (unlikely(mss
&& f
== (nr_frags
-1) &&
2895 size
== len
&& size
> 8))
2897 /* Workaround for potential 82544 hang in PCI-X.
2898 * Avoid terminating buffers within evenly-aligned
2901 bufend
= (unsigned long)
2902 page_to_phys(skb_frag_page(frag
));
2903 bufend
+= offset
+ size
- 1;
2904 if (unlikely(adapter
->pcix_82544
&&
2909 buffer_info
->length
= size
;
2910 buffer_info
->time_stamp
= jiffies
;
2911 buffer_info
->mapped_as_page
= true;
2912 buffer_info
->dma
= skb_frag_dma_map(&pdev
->dev
, frag
,
2913 offset
, size
, DMA_TO_DEVICE
);
2914 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2916 buffer_info
->next_to_watch
= i
;
2924 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
2925 /* multiply data chunks by size of headers */
2926 bytecount
= ((segs
- 1) * skb_headlen(skb
)) + skb
->len
;
2928 tx_ring
->buffer_info
[i
].skb
= skb
;
2929 tx_ring
->buffer_info
[i
].segs
= segs
;
2930 tx_ring
->buffer_info
[i
].bytecount
= bytecount
;
2931 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2936 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2937 buffer_info
->dma
= 0;
2943 i
+= tx_ring
->count
;
2945 buffer_info
= &tx_ring
->buffer_info
[i
];
2946 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2952 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
2953 struct e1000_tx_ring
*tx_ring
, int tx_flags
,
2956 struct e1000_hw
*hw
= &adapter
->hw
;
2957 struct e1000_tx_desc
*tx_desc
= NULL
;
2958 struct e1000_buffer
*buffer_info
;
2959 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
2962 if (likely(tx_flags
& E1000_TX_FLAGS_TSO
)) {
2963 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
2965 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2967 if (likely(tx_flags
& E1000_TX_FLAGS_IPV4
))
2968 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
2971 if (likely(tx_flags
& E1000_TX_FLAGS_CSUM
)) {
2972 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
2973 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2976 if (unlikely(tx_flags
& E1000_TX_FLAGS_VLAN
)) {
2977 txd_lower
|= E1000_TXD_CMD_VLE
;
2978 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
2981 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
2982 txd_lower
&= ~(E1000_TXD_CMD_IFCS
);
2984 i
= tx_ring
->next_to_use
;
2987 buffer_info
= &tx_ring
->buffer_info
[i
];
2988 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
2989 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2990 tx_desc
->lower
.data
=
2991 cpu_to_le32(txd_lower
| buffer_info
->length
);
2992 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
2993 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2996 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
2998 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
2999 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
3000 tx_desc
->lower
.data
&= ~(cpu_to_le32(E1000_TXD_CMD_IFCS
));
3002 /* Force memory writes to complete before letting h/w
3003 * know there are new descriptors to fetch. (Only
3004 * applicable for weak-ordered memory model archs,
3009 tx_ring
->next_to_use
= i
;
3010 writel(i
, hw
->hw_addr
+ tx_ring
->tdt
);
3011 /* we need this if more than one processor can write to our tail
3012 * at a time, it synchronizes IO on IA64/Altix systems
3017 /* 82547 workaround to avoid controller hang in half-duplex environment.
3018 * The workaround is to avoid queuing a large packet that would span
3019 * the internal Tx FIFO ring boundary by notifying the stack to resend
3020 * the packet at a later time. This gives the Tx FIFO an opportunity to
3021 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3022 * to the beginning of the Tx FIFO.
3025 #define E1000_FIFO_HDR 0x10
3026 #define E1000_82547_PAD_LEN 0x3E0
3028 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
3029 struct sk_buff
*skb
)
3031 u32 fifo_space
= adapter
->tx_fifo_size
- adapter
->tx_fifo_head
;
3032 u32 skb_fifo_len
= skb
->len
+ E1000_FIFO_HDR
;
3034 skb_fifo_len
= ALIGN(skb_fifo_len
, E1000_FIFO_HDR
);
3036 if (adapter
->link_duplex
!= HALF_DUPLEX
)
3037 goto no_fifo_stall_required
;
3039 if (atomic_read(&adapter
->tx_fifo_stall
))
3042 if (skb_fifo_len
>= (E1000_82547_PAD_LEN
+ fifo_space
)) {
3043 atomic_set(&adapter
->tx_fifo_stall
, 1);
3047 no_fifo_stall_required
:
3048 adapter
->tx_fifo_head
+= skb_fifo_len
;
3049 if (adapter
->tx_fifo_head
>= adapter
->tx_fifo_size
)
3050 adapter
->tx_fifo_head
-= adapter
->tx_fifo_size
;
3054 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
3056 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3057 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3059 netif_stop_queue(netdev
);
3060 /* Herbert's original patch had:
3061 * smp_mb__after_netif_stop_queue();
3062 * but since that doesn't exist yet, just open code it.
3066 /* We need to check again in a case another CPU has just
3067 * made room available.
3069 if (likely(E1000_DESC_UNUSED(tx_ring
) < size
))
3073 netif_start_queue(netdev
);
3074 ++adapter
->restart_queue
;
3078 static int e1000_maybe_stop_tx(struct net_device
*netdev
,
3079 struct e1000_tx_ring
*tx_ring
, int size
)
3081 if (likely(E1000_DESC_UNUSED(tx_ring
) >= size
))
3083 return __e1000_maybe_stop_tx(netdev
, size
);
3086 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3087 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
3088 struct net_device
*netdev
)
3090 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3091 struct e1000_hw
*hw
= &adapter
->hw
;
3092 struct e1000_tx_ring
*tx_ring
;
3093 unsigned int first
, max_per_txd
= E1000_MAX_DATA_PER_TXD
;
3094 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
3095 unsigned int tx_flags
= 0;
3096 unsigned int len
= skb_headlen(skb
);
3097 unsigned int nr_frags
;
3102 __be16 protocol
= vlan_get_protocol(skb
);
3104 /* This goes back to the question of how to logically map a Tx queue
3105 * to a flow. Right now, performance is impacted slightly negatively
3106 * if using multiple Tx queues. If the stack breaks away from a
3107 * single qdisc implementation, we can look at this again.
3109 tx_ring
= adapter
->tx_ring
;
3111 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3112 * packets may get corrupted during padding by HW.
3113 * To WA this issue, pad all small packets manually.
3115 if (skb
->len
< ETH_ZLEN
) {
3116 if (skb_pad(skb
, ETH_ZLEN
- skb
->len
))
3117 return NETDEV_TX_OK
;
3118 skb
->len
= ETH_ZLEN
;
3119 skb_set_tail_pointer(skb
, ETH_ZLEN
);
3122 mss
= skb_shinfo(skb
)->gso_size
;
3123 /* The controller does a simple calculation to
3124 * make sure there is enough room in the FIFO before
3125 * initiating the DMA for each buffer. The calc is:
3126 * 4 = ceil(buffer len/mss). To make sure we don't
3127 * overrun the FIFO, adjust the max buffer len if mss
3132 max_per_txd
= min(mss
<< 2, max_per_txd
);
3133 max_txd_pwr
= fls(max_per_txd
) - 1;
3135 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3136 if (skb
->data_len
&& hdr_len
== len
) {
3137 switch (hw
->mac_type
) {
3138 unsigned int pull_size
;
3140 /* Make sure we have room to chop off 4 bytes,
3141 * and that the end alignment will work out to
3142 * this hardware's requirements
3143 * NOTE: this is a TSO only workaround
3144 * if end byte alignment not correct move us
3145 * into the next dword
3147 if ((unsigned long)(skb_tail_pointer(skb
) - 1)
3151 pull_size
= min((unsigned int)4, skb
->data_len
);
3152 if (!__pskb_pull_tail(skb
, pull_size
)) {
3153 e_err(drv
, "__pskb_pull_tail "
3155 dev_kfree_skb_any(skb
);
3156 return NETDEV_TX_OK
;
3158 len
= skb_headlen(skb
);
3167 /* reserve a descriptor for the offload context */
3168 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
3172 /* Controller Erratum workaround */
3173 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&& !skb_is_gso(skb
))
3176 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
3178 if (adapter
->pcix_82544
)
3181 /* work-around for errata 10 and it applies to all controllers
3182 * in PCI-X mode, so add one more descriptor to the count
3184 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
3188 nr_frags
= skb_shinfo(skb
)->nr_frags
;
3189 for (f
= 0; f
< nr_frags
; f
++)
3190 count
+= TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb
)->frags
[f
]),
3192 if (adapter
->pcix_82544
)
3195 /* need: count + 2 desc gap to keep tail from touching
3196 * head, otherwise try next time
3198 if (unlikely(e1000_maybe_stop_tx(netdev
, tx_ring
, count
+ 2)))
3199 return NETDEV_TX_BUSY
;
3201 if (unlikely((hw
->mac_type
== e1000_82547
) &&
3202 (e1000_82547_fifo_workaround(adapter
, skb
)))) {
3203 netif_stop_queue(netdev
);
3204 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3205 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
3206 return NETDEV_TX_BUSY
;
3209 if (vlan_tx_tag_present(skb
)) {
3210 tx_flags
|= E1000_TX_FLAGS_VLAN
;
3211 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
3214 first
= tx_ring
->next_to_use
;
3216 tso
= e1000_tso(adapter
, tx_ring
, skb
, protocol
);
3218 dev_kfree_skb_any(skb
);
3219 return NETDEV_TX_OK
;
3223 if (likely(hw
->mac_type
!= e1000_82544
))
3224 tx_ring
->last_tx_tso
= true;
3225 tx_flags
|= E1000_TX_FLAGS_TSO
;
3226 } else if (likely(e1000_tx_csum(adapter
, tx_ring
, skb
, protocol
)))
3227 tx_flags
|= E1000_TX_FLAGS_CSUM
;
3229 if (protocol
== htons(ETH_P_IP
))
3230 tx_flags
|= E1000_TX_FLAGS_IPV4
;
3232 if (unlikely(skb
->no_fcs
))
3233 tx_flags
|= E1000_TX_FLAGS_NO_FCS
;
3235 count
= e1000_tx_map(adapter
, tx_ring
, skb
, first
, max_per_txd
,
3239 netdev_sent_queue(netdev
, skb
->len
);
3240 skb_tx_timestamp(skb
);
3242 e1000_tx_queue(adapter
, tx_ring
, tx_flags
, count
);
3243 /* Make sure there is space in the ring for the next send. */
3244 e1000_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 2);
3247 dev_kfree_skb_any(skb
);
3248 tx_ring
->buffer_info
[first
].time_stamp
= 0;
3249 tx_ring
->next_to_use
= first
;
3252 return NETDEV_TX_OK
;
3255 #define NUM_REGS 38 /* 1 based count */
3256 static void e1000_regdump(struct e1000_adapter
*adapter
)
3258 struct e1000_hw
*hw
= &adapter
->hw
;
3260 u32
*regs_buff
= regs
;
3263 static const char * const reg_name
[] = {
3265 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3266 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3267 "TIDV", "TXDCTL", "TADV", "TARC0",
3268 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3270 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3271 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3272 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3275 regs_buff
[0] = er32(CTRL
);
3276 regs_buff
[1] = er32(STATUS
);
3278 regs_buff
[2] = er32(RCTL
);
3279 regs_buff
[3] = er32(RDLEN
);
3280 regs_buff
[4] = er32(RDH
);
3281 regs_buff
[5] = er32(RDT
);
3282 regs_buff
[6] = er32(RDTR
);
3284 regs_buff
[7] = er32(TCTL
);
3285 regs_buff
[8] = er32(TDBAL
);
3286 regs_buff
[9] = er32(TDBAH
);
3287 regs_buff
[10] = er32(TDLEN
);
3288 regs_buff
[11] = er32(TDH
);
3289 regs_buff
[12] = er32(TDT
);
3290 regs_buff
[13] = er32(TIDV
);
3291 regs_buff
[14] = er32(TXDCTL
);
3292 regs_buff
[15] = er32(TADV
);
3293 regs_buff
[16] = er32(TARC0
);
3295 regs_buff
[17] = er32(TDBAL1
);
3296 regs_buff
[18] = er32(TDBAH1
);
3297 regs_buff
[19] = er32(TDLEN1
);
3298 regs_buff
[20] = er32(TDH1
);
3299 regs_buff
[21] = er32(TDT1
);
3300 regs_buff
[22] = er32(TXDCTL1
);
3301 regs_buff
[23] = er32(TARC1
);
3302 regs_buff
[24] = er32(CTRL_EXT
);
3303 regs_buff
[25] = er32(ERT
);
3304 regs_buff
[26] = er32(RDBAL0
);
3305 regs_buff
[27] = er32(RDBAH0
);
3306 regs_buff
[28] = er32(TDFH
);
3307 regs_buff
[29] = er32(TDFT
);
3308 regs_buff
[30] = er32(TDFHS
);
3309 regs_buff
[31] = er32(TDFTS
);
3310 regs_buff
[32] = er32(TDFPC
);
3311 regs_buff
[33] = er32(RDFH
);
3312 regs_buff
[34] = er32(RDFT
);
3313 regs_buff
[35] = er32(RDFHS
);
3314 regs_buff
[36] = er32(RDFTS
);
3315 regs_buff
[37] = er32(RDFPC
);
3317 pr_info("Register dump\n");
3318 for (i
= 0; i
< NUM_REGS
; i
++)
3319 pr_info("%-15s %08x\n", reg_name
[i
], regs_buff
[i
]);
3323 * e1000_dump: Print registers, tx ring and rx ring
3325 static void e1000_dump(struct e1000_adapter
*adapter
)
3327 /* this code doesn't handle multiple rings */
3328 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3329 struct e1000_rx_ring
*rx_ring
= adapter
->rx_ring
;
3332 if (!netif_msg_hw(adapter
))
3335 /* Print Registers */
3336 e1000_regdump(adapter
);
3339 pr_info("TX Desc ring0 dump\n");
3341 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3343 * Legacy Transmit Descriptor
3344 * +--------------------------------------------------------------+
3345 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3346 * +--------------------------------------------------------------+
3347 * 8 | Special | CSS | Status | CMD | CSO | Length |
3348 * +--------------------------------------------------------------+
3349 * 63 48 47 36 35 32 31 24 23 16 15 0
3351 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3352 * 63 48 47 40 39 32 31 16 15 8 7 0
3353 * +----------------------------------------------------------------+
3354 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3355 * +----------------------------------------------------------------+
3356 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3357 * +----------------------------------------------------------------+
3358 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3360 * Extended Data Descriptor (DTYP=0x1)
3361 * +----------------------------------------------------------------+
3362 * 0 | Buffer Address [63:0] |
3363 * +----------------------------------------------------------------+
3364 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3365 * +----------------------------------------------------------------+
3366 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3368 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3369 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3371 if (!netif_msg_tx_done(adapter
))
3372 goto rx_ring_summary
;
3374 for (i
= 0; tx_ring
->desc
&& (i
< tx_ring
->count
); i
++) {
3375 struct e1000_tx_desc
*tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3376 struct e1000_buffer
*buffer_info
= &tx_ring
->buffer_info
[i
];
3377 struct my_u
{ __le64 a
; __le64 b
; };
3378 struct my_u
*u
= (struct my_u
*)tx_desc
;
3381 if (i
== tx_ring
->next_to_use
&& i
== tx_ring
->next_to_clean
)
3383 else if (i
== tx_ring
->next_to_use
)
3385 else if (i
== tx_ring
->next_to_clean
)
3390 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3391 ((le64_to_cpu(u
->b
) & (1<<20)) ? 'd' : 'c'), i
,
3392 le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3393 (u64
)buffer_info
->dma
, buffer_info
->length
,
3394 buffer_info
->next_to_watch
,
3395 (u64
)buffer_info
->time_stamp
, buffer_info
->skb
, type
);
3400 pr_info("\nRX Desc ring dump\n");
3402 /* Legacy Receive Descriptor Format
3404 * +-----------------------------------------------------+
3405 * | Buffer Address [63:0] |
3406 * +-----------------------------------------------------+
3407 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3408 * +-----------------------------------------------------+
3409 * 63 48 47 40 39 32 31 16 15 0
3411 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3413 if (!netif_msg_rx_status(adapter
))
3416 for (i
= 0; rx_ring
->desc
&& (i
< rx_ring
->count
); i
++) {
3417 struct e1000_rx_desc
*rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3418 struct e1000_buffer
*buffer_info
= &rx_ring
->buffer_info
[i
];
3419 struct my_u
{ __le64 a
; __le64 b
; };
3420 struct my_u
*u
= (struct my_u
*)rx_desc
;
3423 if (i
== rx_ring
->next_to_use
)
3425 else if (i
== rx_ring
->next_to_clean
)
3430 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3431 i
, le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3432 (u64
)buffer_info
->dma
, buffer_info
->skb
, type
);
3435 /* dump the descriptor caches */
3437 pr_info("Rx descriptor cache in 64bit format\n");
3438 for (i
= 0x6000; i
<= 0x63FF ; i
+= 0x10) {
3439 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3441 readl(adapter
->hw
.hw_addr
+ i
+4),
3442 readl(adapter
->hw
.hw_addr
+ i
),
3443 readl(adapter
->hw
.hw_addr
+ i
+12),
3444 readl(adapter
->hw
.hw_addr
+ i
+8));
3447 pr_info("Tx descriptor cache in 64bit format\n");
3448 for (i
= 0x7000; i
<= 0x73FF ; i
+= 0x10) {
3449 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3451 readl(adapter
->hw
.hw_addr
+ i
+4),
3452 readl(adapter
->hw
.hw_addr
+ i
),
3453 readl(adapter
->hw
.hw_addr
+ i
+12),
3454 readl(adapter
->hw
.hw_addr
+ i
+8));
3461 * e1000_tx_timeout - Respond to a Tx Hang
3462 * @netdev: network interface device structure
3464 static void e1000_tx_timeout(struct net_device
*netdev
)
3466 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3468 /* Do the reset outside of interrupt context */
3469 adapter
->tx_timeout_count
++;
3470 schedule_work(&adapter
->reset_task
);
3473 static void e1000_reset_task(struct work_struct
*work
)
3475 struct e1000_adapter
*adapter
=
3476 container_of(work
, struct e1000_adapter
, reset_task
);
3478 e_err(drv
, "Reset adapter\n");
3479 e1000_reinit_locked(adapter
);
3483 * e1000_get_stats - Get System Network Statistics
3484 * @netdev: network interface device structure
3486 * Returns the address of the device statistics structure.
3487 * The statistics are actually updated from the watchdog.
3489 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
3491 /* only return the current stats */
3492 return &netdev
->stats
;
3496 * e1000_change_mtu - Change the Maximum Transfer Unit
3497 * @netdev: network interface device structure
3498 * @new_mtu: new value for maximum frame size
3500 * Returns 0 on success, negative on failure
3502 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
3504 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3505 struct e1000_hw
*hw
= &adapter
->hw
;
3506 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
3508 if ((max_frame
< MINIMUM_ETHERNET_FRAME_SIZE
) ||
3509 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3510 e_err(probe
, "Invalid MTU setting\n");
3514 /* Adapter-specific max frame size limits. */
3515 switch (hw
->mac_type
) {
3516 case e1000_undefined
... e1000_82542_rev2_1
:
3517 if (max_frame
> (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) {
3518 e_err(probe
, "Jumbo Frames not supported.\n");
3523 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3527 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
3529 /* e1000_down has a dependency on max_frame_size */
3530 hw
->max_frame_size
= max_frame
;
3531 if (netif_running(netdev
))
3532 e1000_down(adapter
);
3534 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3535 * means we reserve 2 more, this pushes us to allocate from the next
3537 * i.e. RXBUFFER_2048 --> size-4096 slab
3538 * however with the new *_jumbo_rx* routines, jumbo receives will use
3542 if (max_frame
<= E1000_RXBUFFER_2048
)
3543 adapter
->rx_buffer_len
= E1000_RXBUFFER_2048
;
3545 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3546 adapter
->rx_buffer_len
= E1000_RXBUFFER_16384
;
3547 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3548 adapter
->rx_buffer_len
= PAGE_SIZE
;
3551 /* adjust allocation if LPE protects us, and we aren't using SBP */
3552 if (!hw
->tbi_compatibility_on
&&
3553 ((max_frame
== (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) ||
3554 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
)))
3555 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3557 pr_info("%s changing MTU from %d to %d\n",
3558 netdev
->name
, netdev
->mtu
, new_mtu
);
3559 netdev
->mtu
= new_mtu
;
3561 if (netif_running(netdev
))
3564 e1000_reset(adapter
);
3566 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
3572 * e1000_update_stats - Update the board statistics counters
3573 * @adapter: board private structure
3575 void e1000_update_stats(struct e1000_adapter
*adapter
)
3577 struct net_device
*netdev
= adapter
->netdev
;
3578 struct e1000_hw
*hw
= &adapter
->hw
;
3579 struct pci_dev
*pdev
= adapter
->pdev
;
3580 unsigned long flags
;
3583 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3585 /* Prevent stats update while adapter is being reset, or if the pci
3586 * connection is down.
3588 if (adapter
->link_speed
== 0)
3590 if (pci_channel_offline(pdev
))
3593 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3595 /* these counters are modified from e1000_tbi_adjust_stats,
3596 * called from the interrupt context, so they must only
3597 * be written while holding adapter->stats_lock
3600 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3601 adapter
->stats
.gprc
+= er32(GPRC
);
3602 adapter
->stats
.gorcl
+= er32(GORCL
);
3603 adapter
->stats
.gorch
+= er32(GORCH
);
3604 adapter
->stats
.bprc
+= er32(BPRC
);
3605 adapter
->stats
.mprc
+= er32(MPRC
);
3606 adapter
->stats
.roc
+= er32(ROC
);
3608 adapter
->stats
.prc64
+= er32(PRC64
);
3609 adapter
->stats
.prc127
+= er32(PRC127
);
3610 adapter
->stats
.prc255
+= er32(PRC255
);
3611 adapter
->stats
.prc511
+= er32(PRC511
);
3612 adapter
->stats
.prc1023
+= er32(PRC1023
);
3613 adapter
->stats
.prc1522
+= er32(PRC1522
);
3615 adapter
->stats
.symerrs
+= er32(SYMERRS
);
3616 adapter
->stats
.mpc
+= er32(MPC
);
3617 adapter
->stats
.scc
+= er32(SCC
);
3618 adapter
->stats
.ecol
+= er32(ECOL
);
3619 adapter
->stats
.mcc
+= er32(MCC
);
3620 adapter
->stats
.latecol
+= er32(LATECOL
);
3621 adapter
->stats
.dc
+= er32(DC
);
3622 adapter
->stats
.sec
+= er32(SEC
);
3623 adapter
->stats
.rlec
+= er32(RLEC
);
3624 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3625 adapter
->stats
.xontxc
+= er32(XONTXC
);
3626 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3627 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3628 adapter
->stats
.fcruc
+= er32(FCRUC
);
3629 adapter
->stats
.gptc
+= er32(GPTC
);
3630 adapter
->stats
.gotcl
+= er32(GOTCL
);
3631 adapter
->stats
.gotch
+= er32(GOTCH
);
3632 adapter
->stats
.rnbc
+= er32(RNBC
);
3633 adapter
->stats
.ruc
+= er32(RUC
);
3634 adapter
->stats
.rfc
+= er32(RFC
);
3635 adapter
->stats
.rjc
+= er32(RJC
);
3636 adapter
->stats
.torl
+= er32(TORL
);
3637 adapter
->stats
.torh
+= er32(TORH
);
3638 adapter
->stats
.totl
+= er32(TOTL
);
3639 adapter
->stats
.toth
+= er32(TOTH
);
3640 adapter
->stats
.tpr
+= er32(TPR
);
3642 adapter
->stats
.ptc64
+= er32(PTC64
);
3643 adapter
->stats
.ptc127
+= er32(PTC127
);
3644 adapter
->stats
.ptc255
+= er32(PTC255
);
3645 adapter
->stats
.ptc511
+= er32(PTC511
);
3646 adapter
->stats
.ptc1023
+= er32(PTC1023
);
3647 adapter
->stats
.ptc1522
+= er32(PTC1522
);
3649 adapter
->stats
.mptc
+= er32(MPTC
);
3650 adapter
->stats
.bptc
+= er32(BPTC
);
3652 /* used for adaptive IFS */
3654 hw
->tx_packet_delta
= er32(TPT
);
3655 adapter
->stats
.tpt
+= hw
->tx_packet_delta
;
3656 hw
->collision_delta
= er32(COLC
);
3657 adapter
->stats
.colc
+= hw
->collision_delta
;
3659 if (hw
->mac_type
>= e1000_82543
) {
3660 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3661 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3662 adapter
->stats
.tncrs
+= er32(TNCRS
);
3663 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3664 adapter
->stats
.tsctc
+= er32(TSCTC
);
3665 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3668 /* Fill out the OS statistics structure */
3669 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3670 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3674 /* RLEC on some newer hardware can be incorrect so build
3675 * our own version based on RUC and ROC
3677 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3678 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3679 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3680 adapter
->stats
.cexterr
;
3681 adapter
->stats
.rlerrc
= adapter
->stats
.ruc
+ adapter
->stats
.roc
;
3682 netdev
->stats
.rx_length_errors
= adapter
->stats
.rlerrc
;
3683 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3684 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3685 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3688 adapter
->stats
.txerrc
= adapter
->stats
.ecol
+ adapter
->stats
.latecol
;
3689 netdev
->stats
.tx_errors
= adapter
->stats
.txerrc
;
3690 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3691 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3692 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3693 if (hw
->bad_tx_carr_stats_fd
&&
3694 adapter
->link_duplex
== FULL_DUPLEX
) {
3695 netdev
->stats
.tx_carrier_errors
= 0;
3696 adapter
->stats
.tncrs
= 0;
3699 /* Tx Dropped needs to be maintained elsewhere */
3702 if (hw
->media_type
== e1000_media_type_copper
) {
3703 if ((adapter
->link_speed
== SPEED_1000
) &&
3704 (!e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_tmp
))) {
3705 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3706 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3709 if ((hw
->mac_type
<= e1000_82546
) &&
3710 (hw
->phy_type
== e1000_phy_m88
) &&
3711 !e1000_read_phy_reg(hw
, M88E1000_RX_ERR_CNTR
, &phy_tmp
))
3712 adapter
->phy_stats
.receive_errors
+= phy_tmp
;
3715 /* Management Stats */
3716 if (hw
->has_smbus
) {
3717 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3718 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3719 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3722 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
3726 * e1000_intr - Interrupt Handler
3727 * @irq: interrupt number
3728 * @data: pointer to a network interface device structure
3730 static irqreturn_t
e1000_intr(int irq
, void *data
)
3732 struct net_device
*netdev
= data
;
3733 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3734 struct e1000_hw
*hw
= &adapter
->hw
;
3735 u32 icr
= er32(ICR
);
3737 if (unlikely((!icr
)))
3738 return IRQ_NONE
; /* Not our interrupt */
3740 /* we might have caused the interrupt, but the above
3741 * read cleared it, and just in case the driver is
3742 * down there is nothing to do so return handled
3744 if (unlikely(test_bit(__E1000_DOWN
, &adapter
->flags
)))
3747 if (unlikely(icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
))) {
3748 hw
->get_link_status
= 1;
3749 /* guard against interrupt when we're going down */
3750 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3751 schedule_delayed_work(&adapter
->watchdog_task
, 1);
3754 /* disable interrupts, without the synchronize_irq bit */
3756 E1000_WRITE_FLUSH();
3758 if (likely(napi_schedule_prep(&adapter
->napi
))) {
3759 adapter
->total_tx_bytes
= 0;
3760 adapter
->total_tx_packets
= 0;
3761 adapter
->total_rx_bytes
= 0;
3762 adapter
->total_rx_packets
= 0;
3763 __napi_schedule(&adapter
->napi
);
3765 /* this really should not happen! if it does it is basically a
3766 * bug, but not a hard error, so enable ints and continue
3768 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3769 e1000_irq_enable(adapter
);
3776 * e1000_clean - NAPI Rx polling callback
3777 * @adapter: board private structure
3779 static int e1000_clean(struct napi_struct
*napi
, int budget
)
3781 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
,
3783 int tx_clean_complete
= 0, work_done
= 0;
3785 tx_clean_complete
= e1000_clean_tx_irq(adapter
, &adapter
->tx_ring
[0]);
3787 adapter
->clean_rx(adapter
, &adapter
->rx_ring
[0], &work_done
, budget
);
3789 if (!tx_clean_complete
)
3792 /* If budget not fully consumed, exit the polling mode */
3793 if (work_done
< budget
) {
3794 if (likely(adapter
->itr_setting
& 3))
3795 e1000_set_itr(adapter
);
3796 napi_complete(napi
);
3797 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3798 e1000_irq_enable(adapter
);
3805 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3806 * @adapter: board private structure
3808 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
3809 struct e1000_tx_ring
*tx_ring
)
3811 struct e1000_hw
*hw
= &adapter
->hw
;
3812 struct net_device
*netdev
= adapter
->netdev
;
3813 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
3814 struct e1000_buffer
*buffer_info
;
3815 unsigned int i
, eop
;
3816 unsigned int count
= 0;
3817 unsigned int total_tx_bytes
=0, total_tx_packets
=0;
3818 unsigned int bytes_compl
= 0, pkts_compl
= 0;
3820 i
= tx_ring
->next_to_clean
;
3821 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3822 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3824 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3825 (count
< tx_ring
->count
)) {
3826 bool cleaned
= false;
3827 rmb(); /* read buffer_info after eop_desc */
3828 for ( ; !cleaned
; count
++) {
3829 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3830 buffer_info
= &tx_ring
->buffer_info
[i
];
3831 cleaned
= (i
== eop
);
3834 total_tx_packets
+= buffer_info
->segs
;
3835 total_tx_bytes
+= buffer_info
->bytecount
;
3836 if (buffer_info
->skb
) {
3837 bytes_compl
+= buffer_info
->skb
->len
;
3842 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
3843 tx_desc
->upper
.data
= 0;
3845 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3848 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3849 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3852 tx_ring
->next_to_clean
= i
;
3854 netdev_completed_queue(netdev
, pkts_compl
, bytes_compl
);
3856 #define TX_WAKE_THRESHOLD 32
3857 if (unlikely(count
&& netif_carrier_ok(netdev
) &&
3858 E1000_DESC_UNUSED(tx_ring
) >= TX_WAKE_THRESHOLD
)) {
3859 /* Make sure that anybody stopping the queue after this
3860 * sees the new next_to_clean.
3864 if (netif_queue_stopped(netdev
) &&
3865 !(test_bit(__E1000_DOWN
, &adapter
->flags
))) {
3866 netif_wake_queue(netdev
);
3867 ++adapter
->restart_queue
;
3871 if (adapter
->detect_tx_hung
) {
3872 /* Detect a transmit hang in hardware, this serializes the
3873 * check with the clearing of time_stamp and movement of i
3875 adapter
->detect_tx_hung
= false;
3876 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
3877 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+
3878 (adapter
->tx_timeout_factor
* HZ
)) &&
3879 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
3881 /* detected Tx unit hang */
3882 e_err(drv
, "Detected Tx Unit Hang\n"
3886 " next_to_use <%x>\n"
3887 " next_to_clean <%x>\n"
3888 "buffer_info[next_to_clean]\n"
3889 " time_stamp <%lx>\n"
3890 " next_to_watch <%x>\n"
3892 " next_to_watch.status <%x>\n",
3893 (unsigned long)(tx_ring
- adapter
->tx_ring
),
3894 readl(hw
->hw_addr
+ tx_ring
->tdh
),
3895 readl(hw
->hw_addr
+ tx_ring
->tdt
),
3896 tx_ring
->next_to_use
,
3897 tx_ring
->next_to_clean
,
3898 tx_ring
->buffer_info
[eop
].time_stamp
,
3901 eop_desc
->upper
.fields
.status
);
3902 e1000_dump(adapter
);
3903 netif_stop_queue(netdev
);
3906 adapter
->total_tx_bytes
+= total_tx_bytes
;
3907 adapter
->total_tx_packets
+= total_tx_packets
;
3908 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
3909 netdev
->stats
.tx_packets
+= total_tx_packets
;
3910 return count
< tx_ring
->count
;
3914 * e1000_rx_checksum - Receive Checksum Offload for 82543
3915 * @adapter: board private structure
3916 * @status_err: receive descriptor status and error fields
3917 * @csum: receive descriptor csum field
3918 * @sk_buff: socket buffer with received data
3920 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
3921 u32 csum
, struct sk_buff
*skb
)
3923 struct e1000_hw
*hw
= &adapter
->hw
;
3924 u16 status
= (u16
)status_err
;
3925 u8 errors
= (u8
)(status_err
>> 24);
3927 skb_checksum_none_assert(skb
);
3929 /* 82543 or newer only */
3930 if (unlikely(hw
->mac_type
< e1000_82543
)) return;
3931 /* Ignore Checksum bit is set */
3932 if (unlikely(status
& E1000_RXD_STAT_IXSM
)) return;
3933 /* TCP/UDP checksum error bit is set */
3934 if (unlikely(errors
& E1000_RXD_ERR_TCPE
)) {
3935 /* let the stack verify checksum errors */
3936 adapter
->hw_csum_err
++;
3939 /* TCP/UDP Checksum has not been calculated */
3940 if (!(status
& E1000_RXD_STAT_TCPCS
))
3943 /* It must be a TCP or UDP packet with a valid checksum */
3944 if (likely(status
& E1000_RXD_STAT_TCPCS
)) {
3945 /* TCP checksum is good */
3946 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3948 adapter
->hw_csum_good
++;
3952 * e1000_consume_page - helper function
3954 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
3959 skb
->data_len
+= length
;
3960 skb
->truesize
+= PAGE_SIZE
;
3964 * e1000_receive_skb - helper function to handle rx indications
3965 * @adapter: board private structure
3966 * @status: descriptor status field as written by hardware
3967 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3968 * @skb: pointer to sk_buff to be indicated to stack
3970 static void e1000_receive_skb(struct e1000_adapter
*adapter
, u8 status
,
3971 __le16 vlan
, struct sk_buff
*skb
)
3973 skb
->protocol
= eth_type_trans(skb
, adapter
->netdev
);
3975 if (status
& E1000_RXD_STAT_VP
) {
3976 u16 vid
= le16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
;
3978 __vlan_hwaccel_put_tag(skb
, htons(ETH_P_8021Q
), vid
);
3980 napi_gro_receive(&adapter
->napi
, skb
);
3984 * e1000_tbi_adjust_stats
3985 * @hw: Struct containing variables accessed by shared code
3986 * @frame_len: The length of the frame in question
3987 * @mac_addr: The Ethernet destination address of the frame in question
3989 * Adjusts the statistic counters when a frame is accepted by TBI_ACCEPT
3991 static void e1000_tbi_adjust_stats(struct e1000_hw
*hw
,
3992 struct e1000_hw_stats
*stats
,
3993 u32 frame_len
, const u8
*mac_addr
)
3997 /* First adjust the frame length. */
3999 /* We need to adjust the statistics counters, since the hardware
4000 * counters overcount this packet as a CRC error and undercount
4001 * the packet as a good packet
4003 /* This packet should not be counted as a CRC error. */
4005 /* This packet does count as a Good Packet Received. */
4008 /* Adjust the Good Octets received counters */
4009 carry_bit
= 0x80000000 & stats
->gorcl
;
4010 stats
->gorcl
+= frame_len
;
4011 /* If the high bit of Gorcl (the low 32 bits of the Good Octets
4012 * Received Count) was one before the addition,
4013 * AND it is zero after, then we lost the carry out,
4014 * need to add one to Gorch (Good Octets Received Count High).
4015 * This could be simplified if all environments supported
4018 if (carry_bit
&& ((stats
->gorcl
& 0x80000000) == 0))
4020 /* Is this a broadcast or multicast? Check broadcast first,
4021 * since the test for a multicast frame will test positive on
4022 * a broadcast frame.
4024 if (is_broadcast_ether_addr(mac_addr
))
4026 else if (is_multicast_ether_addr(mac_addr
))
4029 if (frame_len
== hw
->max_frame_size
) {
4030 /* In this case, the hardware has overcounted the number of
4037 /* Adjust the bin counters when the extra byte put the frame in the
4038 * wrong bin. Remember that the frame_len was adjusted above.
4040 if (frame_len
== 64) {
4043 } else if (frame_len
== 127) {
4046 } else if (frame_len
== 255) {
4049 } else if (frame_len
== 511) {
4052 } else if (frame_len
== 1023) {
4055 } else if (frame_len
== 1522) {
4061 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4062 * @adapter: board private structure
4063 * @rx_ring: ring to clean
4064 * @work_done: amount of napi work completed this call
4065 * @work_to_do: max amount of work allowed for this call to do
4067 * the return value indicates whether actual cleaning was done, there
4068 * is no guarantee that everything was cleaned
4070 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
4071 struct e1000_rx_ring
*rx_ring
,
4072 int *work_done
, int work_to_do
)
4074 struct e1000_hw
*hw
= &adapter
->hw
;
4075 struct net_device
*netdev
= adapter
->netdev
;
4076 struct pci_dev
*pdev
= adapter
->pdev
;
4077 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4078 struct e1000_buffer
*buffer_info
, *next_buffer
;
4079 unsigned long irq_flags
;
4082 int cleaned_count
= 0;
4083 bool cleaned
= false;
4084 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4086 i
= rx_ring
->next_to_clean
;
4087 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4088 buffer_info
= &rx_ring
->buffer_info
[i
];
4090 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4091 struct sk_buff
*skb
;
4094 if (*work_done
>= work_to_do
)
4097 rmb(); /* read descriptor and rx_buffer_info after status DD */
4099 status
= rx_desc
->status
;
4100 skb
= buffer_info
->skb
;
4101 buffer_info
->skb
= NULL
;
4103 if (++i
== rx_ring
->count
) i
= 0;
4104 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4107 next_buffer
= &rx_ring
->buffer_info
[i
];
4111 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
4112 buffer_info
->length
, DMA_FROM_DEVICE
);
4113 buffer_info
->dma
= 0;
4115 length
= le16_to_cpu(rx_desc
->length
);
4117 /* errors is only valid for DD + EOP descriptors */
4118 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
4119 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
4123 mapped
= page_address(buffer_info
->page
);
4124 last_byte
= *(mapped
+ length
- 1);
4125 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4127 spin_lock_irqsave(&adapter
->stats_lock
,
4129 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4131 spin_unlock_irqrestore(&adapter
->stats_lock
,
4135 if (netdev
->features
& NETIF_F_RXALL
)
4137 /* recycle both page and skb */
4138 buffer_info
->skb
= skb
;
4139 /* an error means any chain goes out the window
4142 if (rx_ring
->rx_skb_top
)
4143 dev_kfree_skb(rx_ring
->rx_skb_top
);
4144 rx_ring
->rx_skb_top
= NULL
;
4149 #define rxtop rx_ring->rx_skb_top
4151 if (!(status
& E1000_RXD_STAT_EOP
)) {
4152 /* this descriptor is only the beginning (or middle) */
4154 /* this is the beginning of a chain */
4156 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
4159 /* this is the middle of a chain */
4160 skb_fill_page_desc(rxtop
,
4161 skb_shinfo(rxtop
)->nr_frags
,
4162 buffer_info
->page
, 0, length
);
4163 /* re-use the skb, only consumed the page */
4164 buffer_info
->skb
= skb
;
4166 e1000_consume_page(buffer_info
, rxtop
, length
);
4170 /* end of the chain */
4171 skb_fill_page_desc(rxtop
,
4172 skb_shinfo(rxtop
)->nr_frags
,
4173 buffer_info
->page
, 0, length
);
4174 /* re-use the current skb, we only consumed the
4177 buffer_info
->skb
= skb
;
4180 e1000_consume_page(buffer_info
, skb
, length
);
4182 /* no chain, got EOP, this buf is the packet
4183 * copybreak to save the put_page/alloc_page
4185 if (length
<= copybreak
&&
4186 skb_tailroom(skb
) >= length
) {
4188 vaddr
= kmap_atomic(buffer_info
->page
);
4189 memcpy(skb_tail_pointer(skb
), vaddr
,
4191 kunmap_atomic(vaddr
);
4192 /* re-use the page, so don't erase
4195 skb_put(skb
, length
);
4197 skb_fill_page_desc(skb
, 0,
4198 buffer_info
->page
, 0,
4200 e1000_consume_page(buffer_info
, skb
,
4206 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4207 e1000_rx_checksum(adapter
,
4209 ((u32
)(rx_desc
->errors
) << 24),
4210 le16_to_cpu(rx_desc
->csum
), skb
);
4212 total_rx_bytes
+= (skb
->len
- 4); /* don't count FCS */
4213 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4214 pskb_trim(skb
, skb
->len
- 4);
4217 /* eth type trans needs skb->data to point to something */
4218 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
4219 e_err(drv
, "pskb_may_pull failed.\n");
4224 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4227 rx_desc
->status
= 0;
4229 /* return some buffers to hardware, one at a time is too slow */
4230 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4231 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4235 /* use prefetched values */
4237 buffer_info
= next_buffer
;
4239 rx_ring
->next_to_clean
= i
;
4241 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4243 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4245 adapter
->total_rx_packets
+= total_rx_packets
;
4246 adapter
->total_rx_bytes
+= total_rx_bytes
;
4247 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4248 netdev
->stats
.rx_packets
+= total_rx_packets
;
4252 /* this should improve performance for small packets with large amounts
4253 * of reassembly being done in the stack
4255 static void e1000_check_copybreak(struct net_device
*netdev
,
4256 struct e1000_buffer
*buffer_info
,
4257 u32 length
, struct sk_buff
**skb
)
4259 struct sk_buff
*new_skb
;
4261 if (length
> copybreak
)
4264 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
4268 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
4269 (*skb
)->data
- NET_IP_ALIGN
,
4270 length
+ NET_IP_ALIGN
);
4271 /* save the skb in buffer_info as good */
4272 buffer_info
->skb
= *skb
;
4277 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4278 * @adapter: board private structure
4279 * @rx_ring: ring to clean
4280 * @work_done: amount of napi work completed this call
4281 * @work_to_do: max amount of work allowed for this call to do
4283 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
4284 struct e1000_rx_ring
*rx_ring
,
4285 int *work_done
, int work_to_do
)
4287 struct e1000_hw
*hw
= &adapter
->hw
;
4288 struct net_device
*netdev
= adapter
->netdev
;
4289 struct pci_dev
*pdev
= adapter
->pdev
;
4290 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4291 struct e1000_buffer
*buffer_info
, *next_buffer
;
4292 unsigned long flags
;
4295 int cleaned_count
= 0;
4296 bool cleaned
= false;
4297 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4299 i
= rx_ring
->next_to_clean
;
4300 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4301 buffer_info
= &rx_ring
->buffer_info
[i
];
4303 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4304 struct sk_buff
*skb
;
4307 if (*work_done
>= work_to_do
)
4310 rmb(); /* read descriptor and rx_buffer_info after status DD */
4312 status
= rx_desc
->status
;
4313 skb
= buffer_info
->skb
;
4314 buffer_info
->skb
= NULL
;
4316 prefetch(skb
->data
- NET_IP_ALIGN
);
4318 if (++i
== rx_ring
->count
) i
= 0;
4319 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4322 next_buffer
= &rx_ring
->buffer_info
[i
];
4326 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4327 buffer_info
->length
, DMA_FROM_DEVICE
);
4328 buffer_info
->dma
= 0;
4330 length
= le16_to_cpu(rx_desc
->length
);
4331 /* !EOP means multiple descriptors were used to store a single
4332 * packet, if thats the case we need to toss it. In fact, we
4333 * to toss every packet with the EOP bit clear and the next
4334 * frame that _does_ have the EOP bit set, as it is by
4335 * definition only a frame fragment
4337 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
4338 adapter
->discarding
= true;
4340 if (adapter
->discarding
) {
4341 /* All receives must fit into a single buffer */
4342 e_dbg("Receive packet consumed multiple buffers\n");
4344 buffer_info
->skb
= skb
;
4345 if (status
& E1000_RXD_STAT_EOP
)
4346 adapter
->discarding
= false;
4350 if (unlikely(rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
)) {
4351 u8 last_byte
= *(skb
->data
+ length
- 1);
4352 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4354 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4355 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4357 spin_unlock_irqrestore(&adapter
->stats_lock
,
4361 if (netdev
->features
& NETIF_F_RXALL
)
4364 buffer_info
->skb
= skb
;
4370 total_rx_bytes
+= (length
- 4); /* don't count FCS */
4373 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4374 /* adjust length to remove Ethernet CRC, this must be
4375 * done after the TBI_ACCEPT workaround above
4379 e1000_check_copybreak(netdev
, buffer_info
, length
, &skb
);
4381 skb_put(skb
, length
);
4383 /* Receive Checksum Offload */
4384 e1000_rx_checksum(adapter
,
4386 ((u32
)(rx_desc
->errors
) << 24),
4387 le16_to_cpu(rx_desc
->csum
), skb
);
4389 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4392 rx_desc
->status
= 0;
4394 /* return some buffers to hardware, one at a time is too slow */
4395 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4396 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4400 /* use prefetched values */
4402 buffer_info
= next_buffer
;
4404 rx_ring
->next_to_clean
= i
;
4406 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4408 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4410 adapter
->total_rx_packets
+= total_rx_packets
;
4411 adapter
->total_rx_bytes
+= total_rx_bytes
;
4412 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4413 netdev
->stats
.rx_packets
+= total_rx_packets
;
4418 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4419 * @adapter: address of board private structure
4420 * @rx_ring: pointer to receive ring structure
4421 * @cleaned_count: number of buffers to allocate this pass
4424 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
4425 struct e1000_rx_ring
*rx_ring
, int cleaned_count
)
4427 struct net_device
*netdev
= adapter
->netdev
;
4428 struct pci_dev
*pdev
= adapter
->pdev
;
4429 struct e1000_rx_desc
*rx_desc
;
4430 struct e1000_buffer
*buffer_info
;
4431 struct sk_buff
*skb
;
4433 unsigned int bufsz
= 256 - 16 /*for skb_reserve */ ;
4435 i
= rx_ring
->next_to_use
;
4436 buffer_info
= &rx_ring
->buffer_info
[i
];
4438 while (cleaned_count
--) {
4439 skb
= buffer_info
->skb
;
4445 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4446 if (unlikely(!skb
)) {
4447 /* Better luck next round */
4448 adapter
->alloc_rx_buff_failed
++;
4452 buffer_info
->skb
= skb
;
4453 buffer_info
->length
= adapter
->rx_buffer_len
;
4455 /* allocate a new page if necessary */
4456 if (!buffer_info
->page
) {
4457 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4458 if (unlikely(!buffer_info
->page
)) {
4459 adapter
->alloc_rx_buff_failed
++;
4464 if (!buffer_info
->dma
) {
4465 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
4466 buffer_info
->page
, 0,
4467 buffer_info
->length
,
4469 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4470 put_page(buffer_info
->page
);
4472 buffer_info
->page
= NULL
;
4473 buffer_info
->skb
= NULL
;
4474 buffer_info
->dma
= 0;
4475 adapter
->alloc_rx_buff_failed
++;
4476 break; /* while !buffer_info->skb */
4480 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4481 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4483 if (unlikely(++i
== rx_ring
->count
))
4485 buffer_info
= &rx_ring
->buffer_info
[i
];
4488 if (likely(rx_ring
->next_to_use
!= i
)) {
4489 rx_ring
->next_to_use
= i
;
4490 if (unlikely(i
-- == 0))
4491 i
= (rx_ring
->count
- 1);
4493 /* Force memory writes to complete before letting h/w
4494 * know there are new descriptors to fetch. (Only
4495 * applicable for weak-ordered memory model archs,
4499 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->rdt
);
4504 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4505 * @adapter: address of board private structure
4507 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
4508 struct e1000_rx_ring
*rx_ring
,
4511 struct e1000_hw
*hw
= &adapter
->hw
;
4512 struct net_device
*netdev
= adapter
->netdev
;
4513 struct pci_dev
*pdev
= adapter
->pdev
;
4514 struct e1000_rx_desc
*rx_desc
;
4515 struct e1000_buffer
*buffer_info
;
4516 struct sk_buff
*skb
;
4518 unsigned int bufsz
= adapter
->rx_buffer_len
;
4520 i
= rx_ring
->next_to_use
;
4521 buffer_info
= &rx_ring
->buffer_info
[i
];
4523 while (cleaned_count
--) {
4524 skb
= buffer_info
->skb
;
4530 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4531 if (unlikely(!skb
)) {
4532 /* Better luck next round */
4533 adapter
->alloc_rx_buff_failed
++;
4537 /* Fix for errata 23, can't cross 64kB boundary */
4538 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4539 struct sk_buff
*oldskb
= skb
;
4540 e_err(rx_err
, "skb align check failed: %u bytes at "
4541 "%p\n", bufsz
, skb
->data
);
4542 /* Try again, without freeing the previous */
4543 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4544 /* Failed allocation, critical failure */
4546 dev_kfree_skb(oldskb
);
4547 adapter
->alloc_rx_buff_failed
++;
4551 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4554 dev_kfree_skb(oldskb
);
4555 adapter
->alloc_rx_buff_failed
++;
4556 break; /* while !buffer_info->skb */
4559 /* Use new allocation */
4560 dev_kfree_skb(oldskb
);
4562 buffer_info
->skb
= skb
;
4563 buffer_info
->length
= adapter
->rx_buffer_len
;
4565 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4567 buffer_info
->length
,
4569 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4571 buffer_info
->skb
= NULL
;
4572 buffer_info
->dma
= 0;
4573 adapter
->alloc_rx_buff_failed
++;
4574 break; /* while !buffer_info->skb */
4577 /* XXX if it was allocated cleanly it will never map to a
4581 /* Fix for errata 23, can't cross 64kB boundary */
4582 if (!e1000_check_64k_bound(adapter
,
4583 (void *)(unsigned long)buffer_info
->dma
,
4584 adapter
->rx_buffer_len
)) {
4585 e_err(rx_err
, "dma align check failed: %u bytes at "
4586 "%p\n", adapter
->rx_buffer_len
,
4587 (void *)(unsigned long)buffer_info
->dma
);
4589 buffer_info
->skb
= NULL
;
4591 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4592 adapter
->rx_buffer_len
,
4594 buffer_info
->dma
= 0;
4596 adapter
->alloc_rx_buff_failed
++;
4597 break; /* while !buffer_info->skb */
4599 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4600 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4602 if (unlikely(++i
== rx_ring
->count
))
4604 buffer_info
= &rx_ring
->buffer_info
[i
];
4607 if (likely(rx_ring
->next_to_use
!= i
)) {
4608 rx_ring
->next_to_use
= i
;
4609 if (unlikely(i
-- == 0))
4610 i
= (rx_ring
->count
- 1);
4612 /* Force memory writes to complete before letting h/w
4613 * know there are new descriptors to fetch. (Only
4614 * applicable for weak-ordered memory model archs,
4618 writel(i
, hw
->hw_addr
+ rx_ring
->rdt
);
4623 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4626 static void e1000_smartspeed(struct e1000_adapter
*adapter
)
4628 struct e1000_hw
*hw
= &adapter
->hw
;
4632 if ((hw
->phy_type
!= e1000_phy_igp
) || !hw
->autoneg
||
4633 !(hw
->autoneg_advertised
& ADVERTISE_1000_FULL
))
4636 if (adapter
->smartspeed
== 0) {
4637 /* If Master/Slave config fault is asserted twice,
4638 * we assume back-to-back
4640 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4641 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4642 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4643 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4644 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4645 if (phy_ctrl
& CR_1000T_MS_ENABLE
) {
4646 phy_ctrl
&= ~CR_1000T_MS_ENABLE
;
4647 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
,
4649 adapter
->smartspeed
++;
4650 if (!e1000_phy_setup_autoneg(hw
) &&
4651 !e1000_read_phy_reg(hw
, PHY_CTRL
,
4653 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4654 MII_CR_RESTART_AUTO_NEG
);
4655 e1000_write_phy_reg(hw
, PHY_CTRL
,
4660 } else if (adapter
->smartspeed
== E1000_SMARTSPEED_DOWNSHIFT
) {
4661 /* If still no link, perhaps using 2/3 pair cable */
4662 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4663 phy_ctrl
|= CR_1000T_MS_ENABLE
;
4664 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
, phy_ctrl
);
4665 if (!e1000_phy_setup_autoneg(hw
) &&
4666 !e1000_read_phy_reg(hw
, PHY_CTRL
, &phy_ctrl
)) {
4667 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4668 MII_CR_RESTART_AUTO_NEG
);
4669 e1000_write_phy_reg(hw
, PHY_CTRL
, phy_ctrl
);
4672 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4673 if (adapter
->smartspeed
++ == E1000_SMARTSPEED_MAX
)
4674 adapter
->smartspeed
= 0;
4683 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4689 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4701 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4704 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4705 struct e1000_hw
*hw
= &adapter
->hw
;
4706 struct mii_ioctl_data
*data
= if_mii(ifr
);
4709 unsigned long flags
;
4711 if (hw
->media_type
!= e1000_media_type_copper
)
4716 data
->phy_id
= hw
->phy_addr
;
4719 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4720 if (e1000_read_phy_reg(hw
, data
->reg_num
& 0x1F,
4722 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4725 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4728 if (data
->reg_num
& ~(0x1F))
4730 mii_reg
= data
->val_in
;
4731 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4732 if (e1000_write_phy_reg(hw
, data
->reg_num
,
4734 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4737 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4738 if (hw
->media_type
== e1000_media_type_copper
) {
4739 switch (data
->reg_num
) {
4741 if (mii_reg
& MII_CR_POWER_DOWN
)
4743 if (mii_reg
& MII_CR_AUTO_NEG_EN
) {
4745 hw
->autoneg_advertised
= 0x2F;
4750 else if (mii_reg
& 0x2000)
4754 retval
= e1000_set_spd_dplx(
4762 if (netif_running(adapter
->netdev
))
4763 e1000_reinit_locked(adapter
);
4765 e1000_reset(adapter
);
4767 case M88E1000_PHY_SPEC_CTRL
:
4768 case M88E1000_EXT_PHY_SPEC_CTRL
:
4769 if (e1000_phy_reset(hw
))
4774 switch (data
->reg_num
) {
4776 if (mii_reg
& MII_CR_POWER_DOWN
)
4778 if (netif_running(adapter
->netdev
))
4779 e1000_reinit_locked(adapter
);
4781 e1000_reset(adapter
);
4789 return E1000_SUCCESS
;
4792 void e1000_pci_set_mwi(struct e1000_hw
*hw
)
4794 struct e1000_adapter
*adapter
= hw
->back
;
4795 int ret_val
= pci_set_mwi(adapter
->pdev
);
4798 e_err(probe
, "Error in setting MWI\n");
4801 void e1000_pci_clear_mwi(struct e1000_hw
*hw
)
4803 struct e1000_adapter
*adapter
= hw
->back
;
4805 pci_clear_mwi(adapter
->pdev
);
4808 int e1000_pcix_get_mmrbc(struct e1000_hw
*hw
)
4810 struct e1000_adapter
*adapter
= hw
->back
;
4811 return pcix_get_mmrbc(adapter
->pdev
);
4814 void e1000_pcix_set_mmrbc(struct e1000_hw
*hw
, int mmrbc
)
4816 struct e1000_adapter
*adapter
= hw
->back
;
4817 pcix_set_mmrbc(adapter
->pdev
, mmrbc
);
4820 void e1000_io_write(struct e1000_hw
*hw
, unsigned long port
, u32 value
)
4825 static bool e1000_vlan_used(struct e1000_adapter
*adapter
)
4829 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4834 static void __e1000_vlan_mode(struct e1000_adapter
*adapter
,
4835 netdev_features_t features
)
4837 struct e1000_hw
*hw
= &adapter
->hw
;
4841 if (features
& NETIF_F_HW_VLAN_CTAG_RX
) {
4842 /* enable VLAN tag insert/strip */
4843 ctrl
|= E1000_CTRL_VME
;
4845 /* disable VLAN tag insert/strip */
4846 ctrl
&= ~E1000_CTRL_VME
;
4850 static void e1000_vlan_filter_on_off(struct e1000_adapter
*adapter
,
4853 struct e1000_hw
*hw
= &adapter
->hw
;
4856 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4857 e1000_irq_disable(adapter
);
4859 __e1000_vlan_mode(adapter
, adapter
->netdev
->features
);
4861 /* enable VLAN receive filtering */
4863 rctl
&= ~E1000_RCTL_CFIEN
;
4864 if (!(adapter
->netdev
->flags
& IFF_PROMISC
))
4865 rctl
|= E1000_RCTL_VFE
;
4867 e1000_update_mng_vlan(adapter
);
4869 /* disable VLAN receive filtering */
4871 rctl
&= ~E1000_RCTL_VFE
;
4875 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4876 e1000_irq_enable(adapter
);
4879 static void e1000_vlan_mode(struct net_device
*netdev
,
4880 netdev_features_t features
)
4882 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4884 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4885 e1000_irq_disable(adapter
);
4887 __e1000_vlan_mode(adapter
, features
);
4889 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4890 e1000_irq_enable(adapter
);
4893 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
,
4894 __be16 proto
, u16 vid
)
4896 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4897 struct e1000_hw
*hw
= &adapter
->hw
;
4900 if ((hw
->mng_cookie
.status
&
4901 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
4902 (vid
== adapter
->mng_vlan_id
))
4905 if (!e1000_vlan_used(adapter
))
4906 e1000_vlan_filter_on_off(adapter
, true);
4908 /* add VID to filter table */
4909 index
= (vid
>> 5) & 0x7F;
4910 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4911 vfta
|= (1 << (vid
& 0x1F));
4912 e1000_write_vfta(hw
, index
, vfta
);
4914 set_bit(vid
, adapter
->active_vlans
);
4919 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
,
4920 __be16 proto
, u16 vid
)
4922 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4923 struct e1000_hw
*hw
= &adapter
->hw
;
4926 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4927 e1000_irq_disable(adapter
);
4928 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4929 e1000_irq_enable(adapter
);
4931 /* remove VID from filter table */
4932 index
= (vid
>> 5) & 0x7F;
4933 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4934 vfta
&= ~(1 << (vid
& 0x1F));
4935 e1000_write_vfta(hw
, index
, vfta
);
4937 clear_bit(vid
, adapter
->active_vlans
);
4939 if (!e1000_vlan_used(adapter
))
4940 e1000_vlan_filter_on_off(adapter
, false);
4945 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
4949 if (!e1000_vlan_used(adapter
))
4952 e1000_vlan_filter_on_off(adapter
, true);
4953 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4954 e1000_vlan_rx_add_vid(adapter
->netdev
, htons(ETH_P_8021Q
), vid
);
4957 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u32 spd
, u8 dplx
)
4959 struct e1000_hw
*hw
= &adapter
->hw
;
4963 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4964 * for the switch() below to work
4966 if ((spd
& 1) || (dplx
& ~1))
4969 /* Fiber NICs only allow 1000 gbps Full duplex */
4970 if ((hw
->media_type
== e1000_media_type_fiber
) &&
4971 spd
!= SPEED_1000
&&
4972 dplx
!= DUPLEX_FULL
)
4975 switch (spd
+ dplx
) {
4976 case SPEED_10
+ DUPLEX_HALF
:
4977 hw
->forced_speed_duplex
= e1000_10_half
;
4979 case SPEED_10
+ DUPLEX_FULL
:
4980 hw
->forced_speed_duplex
= e1000_10_full
;
4982 case SPEED_100
+ DUPLEX_HALF
:
4983 hw
->forced_speed_duplex
= e1000_100_half
;
4985 case SPEED_100
+ DUPLEX_FULL
:
4986 hw
->forced_speed_duplex
= e1000_100_full
;
4988 case SPEED_1000
+ DUPLEX_FULL
:
4990 hw
->autoneg_advertised
= ADVERTISE_1000_FULL
;
4992 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4997 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
4998 hw
->mdix
= AUTO_ALL_MODES
;
5003 e_err(probe
, "Unsupported Speed/Duplex configuration\n");
5007 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
5009 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5010 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5011 struct e1000_hw
*hw
= &adapter
->hw
;
5012 u32 ctrl
, ctrl_ext
, rctl
, status
;
5013 u32 wufc
= adapter
->wol
;
5018 netif_device_detach(netdev
);
5020 if (netif_running(netdev
)) {
5021 int count
= E1000_CHECK_RESET_COUNT
;
5023 while (test_bit(__E1000_RESETTING
, &adapter
->flags
) && count
--)
5024 usleep_range(10000, 20000);
5026 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
5027 e1000_down(adapter
);
5031 retval
= pci_save_state(pdev
);
5036 status
= er32(STATUS
);
5037 if (status
& E1000_STATUS_LU
)
5038 wufc
&= ~E1000_WUFC_LNKC
;
5041 e1000_setup_rctl(adapter
);
5042 e1000_set_rx_mode(netdev
);
5046 /* turn on all-multi mode if wake on multicast is enabled */
5047 if (wufc
& E1000_WUFC_MC
)
5048 rctl
|= E1000_RCTL_MPE
;
5050 /* enable receives in the hardware */
5051 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
5053 if (hw
->mac_type
>= e1000_82540
) {
5055 /* advertise wake from D3Cold */
5056 #define E1000_CTRL_ADVD3WUC 0x00100000
5057 /* phy power management enable */
5058 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5059 ctrl
|= E1000_CTRL_ADVD3WUC
|
5060 E1000_CTRL_EN_PHY_PWR_MGMT
;
5064 if (hw
->media_type
== e1000_media_type_fiber
||
5065 hw
->media_type
== e1000_media_type_internal_serdes
) {
5066 /* keep the laser running in D3 */
5067 ctrl_ext
= er32(CTRL_EXT
);
5068 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
5069 ew32(CTRL_EXT
, ctrl_ext
);
5072 ew32(WUC
, E1000_WUC_PME_EN
);
5079 e1000_release_manageability(adapter
);
5081 *enable_wake
= !!wufc
;
5083 /* make sure adapter isn't asleep if manageability is enabled */
5084 if (adapter
->en_mng_pt
)
5085 *enable_wake
= true;
5087 if (netif_running(netdev
))
5088 e1000_free_irq(adapter
);
5090 pci_disable_device(pdev
);
5096 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5101 retval
= __e1000_shutdown(pdev
, &wake
);
5106 pci_prepare_to_sleep(pdev
);
5108 pci_wake_from_d3(pdev
, false);
5109 pci_set_power_state(pdev
, PCI_D3hot
);
5115 static int e1000_resume(struct pci_dev
*pdev
)
5117 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5118 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5119 struct e1000_hw
*hw
= &adapter
->hw
;
5122 pci_set_power_state(pdev
, PCI_D0
);
5123 pci_restore_state(pdev
);
5124 pci_save_state(pdev
);
5126 if (adapter
->need_ioport
)
5127 err
= pci_enable_device(pdev
);
5129 err
= pci_enable_device_mem(pdev
);
5131 pr_err("Cannot enable PCI device from suspend\n");
5134 pci_set_master(pdev
);
5136 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5137 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5139 if (netif_running(netdev
)) {
5140 err
= e1000_request_irq(adapter
);
5145 e1000_power_up_phy(adapter
);
5146 e1000_reset(adapter
);
5149 e1000_init_manageability(adapter
);
5151 if (netif_running(netdev
))
5154 netif_device_attach(netdev
);
5160 static void e1000_shutdown(struct pci_dev
*pdev
)
5164 __e1000_shutdown(pdev
, &wake
);
5166 if (system_state
== SYSTEM_POWER_OFF
) {
5167 pci_wake_from_d3(pdev
, wake
);
5168 pci_set_power_state(pdev
, PCI_D3hot
);
5172 #ifdef CONFIG_NET_POLL_CONTROLLER
5173 /* Polling 'interrupt' - used by things like netconsole to send skbs
5174 * without having to re-enable interrupts. It's not called while
5175 * the interrupt routine is executing.
5177 static void e1000_netpoll(struct net_device
*netdev
)
5179 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5181 disable_irq(adapter
->pdev
->irq
);
5182 e1000_intr(adapter
->pdev
->irq
, netdev
);
5183 enable_irq(adapter
->pdev
->irq
);
5188 * e1000_io_error_detected - called when PCI error is detected
5189 * @pdev: Pointer to PCI device
5190 * @state: The current pci connection state
5192 * This function is called after a PCI bus error affecting
5193 * this device has been detected.
5195 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
5196 pci_channel_state_t state
)
5198 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5199 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5201 netif_device_detach(netdev
);
5203 if (state
== pci_channel_io_perm_failure
)
5204 return PCI_ERS_RESULT_DISCONNECT
;
5206 if (netif_running(netdev
))
5207 e1000_down(adapter
);
5208 pci_disable_device(pdev
);
5210 /* Request a slot slot reset. */
5211 return PCI_ERS_RESULT_NEED_RESET
;
5215 * e1000_io_slot_reset - called after the pci bus has been reset.
5216 * @pdev: Pointer to PCI device
5218 * Restart the card from scratch, as if from a cold-boot. Implementation
5219 * resembles the first-half of the e1000_resume routine.
5221 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
5223 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5224 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5225 struct e1000_hw
*hw
= &adapter
->hw
;
5228 if (adapter
->need_ioport
)
5229 err
= pci_enable_device(pdev
);
5231 err
= pci_enable_device_mem(pdev
);
5233 pr_err("Cannot re-enable PCI device after reset.\n");
5234 return PCI_ERS_RESULT_DISCONNECT
;
5236 pci_set_master(pdev
);
5238 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5239 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5241 e1000_reset(adapter
);
5244 return PCI_ERS_RESULT_RECOVERED
;
5248 * e1000_io_resume - called when traffic can start flowing again.
5249 * @pdev: Pointer to PCI device
5251 * This callback is called when the error recovery driver tells us that
5252 * its OK to resume normal operation. Implementation resembles the
5253 * second-half of the e1000_resume routine.
5255 static void e1000_io_resume(struct pci_dev
*pdev
)
5257 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5258 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5260 e1000_init_manageability(adapter
);
5262 if (netif_running(netdev
)) {
5263 if (e1000_up(adapter
)) {
5264 pr_info("can't bring device back up after reset\n");
5269 netif_device_attach(netdev
);