1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
36 /* Intel Media SOC GbE MDIO physical base address */
37 static unsigned long ce4100_gbe_mdio_base_phy
;
38 /* Intel Media SOC GbE MDIO virtual base address */
39 void __iomem
*ce4100_gbe_mdio_base_virt
;
41 char e1000_driver_name
[] = "e1000";
42 static char e1000_driver_string
[] = "Intel(R) PRO/1000 Network Driver";
43 #define DRV_VERSION "7.3.21-k8-NAPI"
44 const char e1000_driver_version
[] = DRV_VERSION
;
45 static const char e1000_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
47 /* e1000_pci_tbl - PCI Device ID Table
49 * Last entry must be all 0s
52 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
54 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl
) = {
55 INTEL_E1000_ETHERNET_DEVICE(0x1000),
56 INTEL_E1000_ETHERNET_DEVICE(0x1001),
57 INTEL_E1000_ETHERNET_DEVICE(0x1004),
58 INTEL_E1000_ETHERNET_DEVICE(0x1008),
59 INTEL_E1000_ETHERNET_DEVICE(0x1009),
60 INTEL_E1000_ETHERNET_DEVICE(0x100C),
61 INTEL_E1000_ETHERNET_DEVICE(0x100D),
62 INTEL_E1000_ETHERNET_DEVICE(0x100E),
63 INTEL_E1000_ETHERNET_DEVICE(0x100F),
64 INTEL_E1000_ETHERNET_DEVICE(0x1010),
65 INTEL_E1000_ETHERNET_DEVICE(0x1011),
66 INTEL_E1000_ETHERNET_DEVICE(0x1012),
67 INTEL_E1000_ETHERNET_DEVICE(0x1013),
68 INTEL_E1000_ETHERNET_DEVICE(0x1014),
69 INTEL_E1000_ETHERNET_DEVICE(0x1015),
70 INTEL_E1000_ETHERNET_DEVICE(0x1016),
71 INTEL_E1000_ETHERNET_DEVICE(0x1017),
72 INTEL_E1000_ETHERNET_DEVICE(0x1018),
73 INTEL_E1000_ETHERNET_DEVICE(0x1019),
74 INTEL_E1000_ETHERNET_DEVICE(0x101A),
75 INTEL_E1000_ETHERNET_DEVICE(0x101D),
76 INTEL_E1000_ETHERNET_DEVICE(0x101E),
77 INTEL_E1000_ETHERNET_DEVICE(0x1026),
78 INTEL_E1000_ETHERNET_DEVICE(0x1027),
79 INTEL_E1000_ETHERNET_DEVICE(0x1028),
80 INTEL_E1000_ETHERNET_DEVICE(0x1075),
81 INTEL_E1000_ETHERNET_DEVICE(0x1076),
82 INTEL_E1000_ETHERNET_DEVICE(0x1077),
83 INTEL_E1000_ETHERNET_DEVICE(0x1078),
84 INTEL_E1000_ETHERNET_DEVICE(0x1079),
85 INTEL_E1000_ETHERNET_DEVICE(0x107A),
86 INTEL_E1000_ETHERNET_DEVICE(0x107B),
87 INTEL_E1000_ETHERNET_DEVICE(0x107C),
88 INTEL_E1000_ETHERNET_DEVICE(0x108A),
89 INTEL_E1000_ETHERNET_DEVICE(0x1099),
90 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
91 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
92 /* required last entry */
96 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
98 int e1000_up(struct e1000_adapter
*adapter
);
99 void e1000_down(struct e1000_adapter
*adapter
);
100 void e1000_reinit_locked(struct e1000_adapter
*adapter
);
101 void e1000_reset(struct e1000_adapter
*adapter
);
102 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
);
103 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
);
104 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
);
105 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
);
106 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
107 struct e1000_tx_ring
*txdr
);
108 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
109 struct e1000_rx_ring
*rxdr
);
110 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
111 struct e1000_tx_ring
*tx_ring
);
112 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
113 struct e1000_rx_ring
*rx_ring
);
114 void e1000_update_stats(struct e1000_adapter
*adapter
);
116 static int e1000_init_module(void);
117 static void e1000_exit_module(void);
118 static int e1000_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
119 static void __devexit
e1000_remove(struct pci_dev
*pdev
);
120 static int e1000_alloc_queues(struct e1000_adapter
*adapter
);
121 static int e1000_sw_init(struct e1000_adapter
*adapter
);
122 static int e1000_open(struct net_device
*netdev
);
123 static int e1000_close(struct net_device
*netdev
);
124 static void e1000_configure_tx(struct e1000_adapter
*adapter
);
125 static void e1000_configure_rx(struct e1000_adapter
*adapter
);
126 static void e1000_setup_rctl(struct e1000_adapter
*adapter
);
127 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
);
128 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
);
129 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
130 struct e1000_tx_ring
*tx_ring
);
131 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
132 struct e1000_rx_ring
*rx_ring
);
133 static void e1000_set_rx_mode(struct net_device
*netdev
);
134 static void e1000_update_phy_info_task(struct work_struct
*work
);
135 static void e1000_watchdog(struct work_struct
*work
);
136 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
);
137 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
138 struct net_device
*netdev
);
139 static struct net_device_stats
* e1000_get_stats(struct net_device
*netdev
);
140 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
);
141 static int e1000_set_mac(struct net_device
*netdev
, void *p
);
142 static irqreturn_t
e1000_intr(int irq
, void *data
);
143 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
144 struct e1000_tx_ring
*tx_ring
);
145 static int e1000_clean(struct napi_struct
*napi
, int budget
);
146 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
147 struct e1000_rx_ring
*rx_ring
,
148 int *work_done
, int work_to_do
);
149 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
150 struct e1000_rx_ring
*rx_ring
,
151 int *work_done
, int work_to_do
);
152 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
153 struct e1000_rx_ring
*rx_ring
,
155 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
156 struct e1000_rx_ring
*rx_ring
,
158 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
);
159 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
161 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
);
162 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
);
163 static void e1000_tx_timeout(struct net_device
*dev
);
164 static void e1000_reset_task(struct work_struct
*work
);
165 static void e1000_smartspeed(struct e1000_adapter
*adapter
);
166 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
167 struct sk_buff
*skb
);
169 static bool e1000_vlan_used(struct e1000_adapter
*adapter
);
170 static void e1000_vlan_mode(struct net_device
*netdev
,
171 netdev_features_t features
);
172 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
);
173 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
);
174 static void e1000_restore_vlan(struct e1000_adapter
*adapter
);
177 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
);
178 static int e1000_resume(struct pci_dev
*pdev
);
180 static void e1000_shutdown(struct pci_dev
*pdev
);
182 #ifdef CONFIG_NET_POLL_CONTROLLER
183 /* for netdump / net console */
184 static void e1000_netpoll (struct net_device
*netdev
);
187 #define COPYBREAK_DEFAULT 256
188 static unsigned int copybreak __read_mostly
= COPYBREAK_DEFAULT
;
189 module_param(copybreak
, uint
, 0644);
190 MODULE_PARM_DESC(copybreak
,
191 "Maximum size of packet that is copied to a new buffer on receive");
193 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
194 pci_channel_state_t state
);
195 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
);
196 static void e1000_io_resume(struct pci_dev
*pdev
);
198 static struct pci_error_handlers e1000_err_handler
= {
199 .error_detected
= e1000_io_error_detected
,
200 .slot_reset
= e1000_io_slot_reset
,
201 .resume
= e1000_io_resume
,
204 static struct pci_driver e1000_driver
= {
205 .name
= e1000_driver_name
,
206 .id_table
= e1000_pci_tbl
,
207 .probe
= e1000_probe
,
208 .remove
= __devexit_p(e1000_remove
),
210 /* Power Management Hooks */
211 .suspend
= e1000_suspend
,
212 .resume
= e1000_resume
,
214 .shutdown
= e1000_shutdown
,
215 .err_handler
= &e1000_err_handler
218 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
219 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
220 MODULE_LICENSE("GPL");
221 MODULE_VERSION(DRV_VERSION
);
223 static int debug
= NETIF_MSG_DRV
| NETIF_MSG_PROBE
;
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.
245 static int __init
e1000_init_module(void)
248 pr_info("%s - version %s\n", e1000_driver_string
, e1000_driver_version
);
250 pr_info("%s\n", e1000_copyright
);
252 ret
= pci_register_driver(&e1000_driver
);
253 if (copybreak
!= COPYBREAK_DEFAULT
) {
255 pr_info("copybreak disabled\n");
257 pr_info("copybreak enabled for "
258 "packets <= %u bytes\n", copybreak
);
263 module_init(e1000_init_module
);
266 * e1000_exit_module - Driver Exit Cleanup Routine
268 * e1000_exit_module is called just before the driver is removed
272 static void __exit
e1000_exit_module(void)
274 pci_unregister_driver(&e1000_driver
);
277 module_exit(e1000_exit_module
);
279 static int e1000_request_irq(struct e1000_adapter
*adapter
)
281 struct net_device
*netdev
= adapter
->netdev
;
282 irq_handler_t handler
= e1000_intr
;
283 int irq_flags
= IRQF_SHARED
;
286 err
= request_irq(adapter
->pdev
->irq
, handler
, irq_flags
, netdev
->name
,
289 e_err(probe
, "Unable to allocate interrupt Error: %d\n", err
);
295 static void e1000_free_irq(struct e1000_adapter
*adapter
)
297 struct net_device
*netdev
= adapter
->netdev
;
299 free_irq(adapter
->pdev
->irq
, netdev
);
303 * e1000_irq_disable - Mask off interrupt generation on the NIC
304 * @adapter: board private structure
307 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
309 struct e1000_hw
*hw
= &adapter
->hw
;
313 synchronize_irq(adapter
->pdev
->irq
);
317 * e1000_irq_enable - Enable default interrupt generation settings
318 * @adapter: board private structure
321 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
323 struct e1000_hw
*hw
= &adapter
->hw
;
325 ew32(IMS
, IMS_ENABLE_MASK
);
329 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
331 struct e1000_hw
*hw
= &adapter
->hw
;
332 struct net_device
*netdev
= adapter
->netdev
;
333 u16 vid
= hw
->mng_cookie
.vlan_id
;
334 u16 old_vid
= adapter
->mng_vlan_id
;
336 if (!e1000_vlan_used(adapter
))
339 if (!test_bit(vid
, adapter
->active_vlans
)) {
340 if (hw
->mng_cookie
.status
&
341 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) {
342 e1000_vlan_rx_add_vid(netdev
, vid
);
343 adapter
->mng_vlan_id
= vid
;
345 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
347 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
349 !test_bit(old_vid
, adapter
->active_vlans
))
350 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
352 adapter
->mng_vlan_id
= vid
;
356 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
358 struct e1000_hw
*hw
= &adapter
->hw
;
360 if (adapter
->en_mng_pt
) {
361 u32 manc
= er32(MANC
);
363 /* disable hardware interception of ARP */
364 manc
&= ~(E1000_MANC_ARP_EN
);
370 static void e1000_release_manageability(struct e1000_adapter
*adapter
)
372 struct e1000_hw
*hw
= &adapter
->hw
;
374 if (adapter
->en_mng_pt
) {
375 u32 manc
= er32(MANC
);
377 /* re-enable hardware interception of ARP */
378 manc
|= E1000_MANC_ARP_EN
;
385 * e1000_configure - configure the hardware for RX and TX
386 * @adapter = private board structure
388 static void e1000_configure(struct e1000_adapter
*adapter
)
390 struct net_device
*netdev
= adapter
->netdev
;
393 e1000_set_rx_mode(netdev
);
395 e1000_restore_vlan(adapter
);
396 e1000_init_manageability(adapter
);
398 e1000_configure_tx(adapter
);
399 e1000_setup_rctl(adapter
);
400 e1000_configure_rx(adapter
);
401 /* call E1000_DESC_UNUSED which always leaves
402 * at least 1 descriptor unused to make sure
403 * next_to_use != next_to_clean */
404 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
405 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[i
];
406 adapter
->alloc_rx_buf(adapter
, ring
,
407 E1000_DESC_UNUSED(ring
));
411 int e1000_up(struct e1000_adapter
*adapter
)
413 struct e1000_hw
*hw
= &adapter
->hw
;
415 /* hardware has been reset, we need to reload some things */
416 e1000_configure(adapter
);
418 clear_bit(__E1000_DOWN
, &adapter
->flags
);
420 napi_enable(&adapter
->napi
);
422 e1000_irq_enable(adapter
);
424 netif_wake_queue(adapter
->netdev
);
426 /* fire a link change interrupt to start the watchdog */
427 ew32(ICS
, E1000_ICS_LSC
);
432 * e1000_power_up_phy - restore link in case the phy was powered down
433 * @adapter: address of board private structure
435 * The phy may be powered down to save power and turn off link when the
436 * driver is unloaded and wake on lan is not enabled (among others)
437 * *** this routine MUST be followed by a call to e1000_reset ***
441 void e1000_power_up_phy(struct e1000_adapter
*adapter
)
443 struct e1000_hw
*hw
= &adapter
->hw
;
446 /* Just clear the power down bit to wake the phy back up */
447 if (hw
->media_type
== e1000_media_type_copper
) {
448 /* according to the manual, the phy will retain its
449 * settings across a power-down/up cycle */
450 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
451 mii_reg
&= ~MII_CR_POWER_DOWN
;
452 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
456 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
458 struct e1000_hw
*hw
= &adapter
->hw
;
460 /* Power down the PHY so no link is implied when interface is down *
461 * The PHY cannot be powered down if any of the following is true *
464 * (c) SoL/IDER session is active */
465 if (!adapter
->wol
&& hw
->mac_type
>= e1000_82540
&&
466 hw
->media_type
== e1000_media_type_copper
) {
469 switch (hw
->mac_type
) {
472 case e1000_82545_rev_3
:
475 case e1000_82546_rev_3
:
477 case e1000_82541_rev_2
:
479 case e1000_82547_rev_2
:
480 if (er32(MANC
) & E1000_MANC_SMBUS_EN
)
486 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
487 mii_reg
|= MII_CR_POWER_DOWN
;
488 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
495 static void e1000_down_and_stop(struct e1000_adapter
*adapter
)
497 set_bit(__E1000_DOWN
, &adapter
->flags
);
498 cancel_work_sync(&adapter
->reset_task
);
499 cancel_delayed_work_sync(&adapter
->watchdog_task
);
500 cancel_delayed_work_sync(&adapter
->phy_info_task
);
501 cancel_delayed_work_sync(&adapter
->fifo_stall_task
);
504 void e1000_down(struct e1000_adapter
*adapter
)
506 struct e1000_hw
*hw
= &adapter
->hw
;
507 struct net_device
*netdev
= adapter
->netdev
;
511 /* disable receives in the hardware */
513 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
514 /* flush and sleep below */
516 netif_tx_disable(netdev
);
518 /* disable transmits in the hardware */
520 tctl
&= ~E1000_TCTL_EN
;
522 /* flush both disables and wait for them to finish */
526 napi_disable(&adapter
->napi
);
528 e1000_irq_disable(adapter
);
531 * Setting DOWN must be after irq_disable to prevent
532 * a screaming interrupt. Setting DOWN also prevents
533 * tasks from rescheduling.
535 e1000_down_and_stop(adapter
);
537 adapter
->link_speed
= 0;
538 adapter
->link_duplex
= 0;
539 netif_carrier_off(netdev
);
541 e1000_reset(adapter
);
542 e1000_clean_all_tx_rings(adapter
);
543 e1000_clean_all_rx_rings(adapter
);
546 static void e1000_reinit_safe(struct e1000_adapter
*adapter
)
548 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
550 mutex_lock(&adapter
->mutex
);
553 mutex_unlock(&adapter
->mutex
);
554 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
557 void e1000_reinit_locked(struct e1000_adapter
*adapter
)
559 /* if rtnl_lock is not held the call path is bogus */
561 WARN_ON(in_interrupt());
562 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
566 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
569 void e1000_reset(struct e1000_adapter
*adapter
)
571 struct e1000_hw
*hw
= &adapter
->hw
;
572 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
573 bool legacy_pba_adjust
= false;
576 /* Repartition Pba for greater than 9k mtu
577 * To take effect CTRL.RST is required.
580 switch (hw
->mac_type
) {
581 case e1000_82542_rev2_0
:
582 case e1000_82542_rev2_1
:
587 case e1000_82541_rev_2
:
588 legacy_pba_adjust
= true;
592 case e1000_82545_rev_3
:
595 case e1000_82546_rev_3
:
599 case e1000_82547_rev_2
:
600 legacy_pba_adjust
= true;
603 case e1000_undefined
:
608 if (legacy_pba_adjust
) {
609 if (hw
->max_frame_size
> E1000_RXBUFFER_8192
)
610 pba
-= 8; /* allocate more FIFO for Tx */
612 if (hw
->mac_type
== e1000_82547
) {
613 adapter
->tx_fifo_head
= 0;
614 adapter
->tx_head_addr
= pba
<< E1000_TX_HEAD_ADDR_SHIFT
;
615 adapter
->tx_fifo_size
=
616 (E1000_PBA_40K
- pba
) << E1000_PBA_BYTES_SHIFT
;
617 atomic_set(&adapter
->tx_fifo_stall
, 0);
619 } else if (hw
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
620 /* adjust PBA for jumbo frames */
623 /* To maintain wire speed transmits, the Tx FIFO should be
624 * large enough to accommodate two full transmit packets,
625 * rounded up to the next 1KB and expressed in KB. Likewise,
626 * the Rx FIFO should be large enough to accommodate at least
627 * one full receive packet and is similarly rounded up and
628 * expressed in KB. */
630 /* upper 16 bits has Tx packet buffer allocation size in KB */
631 tx_space
= pba
>> 16;
632 /* lower 16 bits has Rx packet buffer allocation size in KB */
635 * the tx fifo also stores 16 bytes of information about the tx
636 * but don't include ethernet FCS because hardware appends it
638 min_tx_space
= (hw
->max_frame_size
+
639 sizeof(struct e1000_tx_desc
) -
641 min_tx_space
= ALIGN(min_tx_space
, 1024);
643 /* software strips receive CRC, so leave room for it */
644 min_rx_space
= hw
->max_frame_size
;
645 min_rx_space
= ALIGN(min_rx_space
, 1024);
648 /* If current Tx allocation is less than the min Tx FIFO size,
649 * and the min Tx FIFO size is less than the current Rx FIFO
650 * allocation, take space away from current Rx allocation */
651 if (tx_space
< min_tx_space
&&
652 ((min_tx_space
- tx_space
) < pba
)) {
653 pba
= pba
- (min_tx_space
- tx_space
);
655 /* PCI/PCIx hardware has PBA alignment constraints */
656 switch (hw
->mac_type
) {
657 case e1000_82545
... e1000_82546_rev_3
:
658 pba
&= ~(E1000_PBA_8K
- 1);
664 /* if short on rx space, rx wins and must trump tx
665 * adjustment or use Early Receive if available */
666 if (pba
< min_rx_space
)
674 * flow control settings:
675 * The high water mark must be low enough to fit one full frame
676 * (or the size used for early receive) above it in the Rx FIFO.
677 * Set it to the lower of:
678 * - 90% of the Rx FIFO size, and
679 * - the full Rx FIFO size minus the early receive size (for parts
680 * with ERT support assuming ERT set to E1000_ERT_2048), or
681 * - the full Rx FIFO size minus one full frame
683 hwm
= min(((pba
<< 10) * 9 / 10),
684 ((pba
<< 10) - hw
->max_frame_size
));
686 hw
->fc_high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
687 hw
->fc_low_water
= hw
->fc_high_water
- 8;
688 hw
->fc_pause_time
= E1000_FC_PAUSE_TIME
;
690 hw
->fc
= hw
->original_fc
;
692 /* Allow time for pending master requests to run */
694 if (hw
->mac_type
>= e1000_82544
)
697 if (e1000_init_hw(hw
))
698 e_dev_err("Hardware Error\n");
699 e1000_update_mng_vlan(adapter
);
701 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
702 if (hw
->mac_type
>= e1000_82544
&&
704 hw
->autoneg_advertised
== ADVERTISE_1000_FULL
) {
705 u32 ctrl
= er32(CTRL
);
706 /* clear phy power management bit if we are in gig only mode,
707 * which if enabled will attempt negotiation to 100Mb, which
708 * can cause a loss of link at power off or driver unload */
709 ctrl
&= ~E1000_CTRL_SWDPIN3
;
713 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
714 ew32(VET
, ETHERNET_IEEE_VLAN_TYPE
);
716 e1000_reset_adaptive(hw
);
717 e1000_phy_get_info(hw
, &adapter
->phy_info
);
719 e1000_release_manageability(adapter
);
723 * Dump the eeprom for users having checksum issues
725 static void e1000_dump_eeprom(struct e1000_adapter
*adapter
)
727 struct net_device
*netdev
= adapter
->netdev
;
728 struct ethtool_eeprom eeprom
;
729 const struct ethtool_ops
*ops
= netdev
->ethtool_ops
;
732 u16 csum_old
, csum_new
= 0;
734 eeprom
.len
= ops
->get_eeprom_len(netdev
);
737 data
= kmalloc(eeprom
.len
, GFP_KERNEL
);
739 pr_err("Unable to allocate memory to dump EEPROM data\n");
743 ops
->get_eeprom(netdev
, &eeprom
, data
);
745 csum_old
= (data
[EEPROM_CHECKSUM_REG
* 2]) +
746 (data
[EEPROM_CHECKSUM_REG
* 2 + 1] << 8);
747 for (i
= 0; i
< EEPROM_CHECKSUM_REG
* 2; i
+= 2)
748 csum_new
+= data
[i
] + (data
[i
+ 1] << 8);
749 csum_new
= EEPROM_SUM
- csum_new
;
751 pr_err("/*********************/\n");
752 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old
);
753 pr_err("Calculated : 0x%04x\n", csum_new
);
755 pr_err("Offset Values\n");
756 pr_err("======== ======\n");
757 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 16, 1, data
, 128, 0);
759 pr_err("Include this output when contacting your support provider.\n");
760 pr_err("This is not a software error! Something bad happened to\n");
761 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
762 pr_err("result in further problems, possibly loss of data,\n");
763 pr_err("corruption or system hangs!\n");
764 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
765 pr_err("which is invalid and requires you to set the proper MAC\n");
766 pr_err("address manually before continuing to enable this network\n");
767 pr_err("device. Please inspect the EEPROM dump and report the\n");
768 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
769 pr_err("/*********************/\n");
775 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
776 * @pdev: PCI device information struct
778 * Return true if an adapter needs ioport resources
780 static int e1000_is_need_ioport(struct pci_dev
*pdev
)
782 switch (pdev
->device
) {
783 case E1000_DEV_ID_82540EM
:
784 case E1000_DEV_ID_82540EM_LOM
:
785 case E1000_DEV_ID_82540EP
:
786 case E1000_DEV_ID_82540EP_LOM
:
787 case E1000_DEV_ID_82540EP_LP
:
788 case E1000_DEV_ID_82541EI
:
789 case E1000_DEV_ID_82541EI_MOBILE
:
790 case E1000_DEV_ID_82541ER
:
791 case E1000_DEV_ID_82541ER_LOM
:
792 case E1000_DEV_ID_82541GI
:
793 case E1000_DEV_ID_82541GI_LF
:
794 case E1000_DEV_ID_82541GI_MOBILE
:
795 case E1000_DEV_ID_82544EI_COPPER
:
796 case E1000_DEV_ID_82544EI_FIBER
:
797 case E1000_DEV_ID_82544GC_COPPER
:
798 case E1000_DEV_ID_82544GC_LOM
:
799 case E1000_DEV_ID_82545EM_COPPER
:
800 case E1000_DEV_ID_82545EM_FIBER
:
801 case E1000_DEV_ID_82546EB_COPPER
:
802 case E1000_DEV_ID_82546EB_FIBER
:
803 case E1000_DEV_ID_82546EB_QUAD_COPPER
:
810 static netdev_features_t
e1000_fix_features(struct net_device
*netdev
,
811 netdev_features_t features
)
814 * Since there is no support for separate rx/tx vlan accel
815 * enable/disable make sure tx flag is always in same state as rx.
817 if (features
& NETIF_F_HW_VLAN_RX
)
818 features
|= NETIF_F_HW_VLAN_TX
;
820 features
&= ~NETIF_F_HW_VLAN_TX
;
825 static int e1000_set_features(struct net_device
*netdev
,
826 netdev_features_t features
)
828 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
829 netdev_features_t changed
= features
^ netdev
->features
;
831 if (changed
& NETIF_F_HW_VLAN_RX
)
832 e1000_vlan_mode(netdev
, features
);
834 if (!(changed
& NETIF_F_RXCSUM
))
837 adapter
->rx_csum
= !!(features
& NETIF_F_RXCSUM
);
839 if (netif_running(netdev
))
840 e1000_reinit_locked(adapter
);
842 e1000_reset(adapter
);
847 static const struct net_device_ops e1000_netdev_ops
= {
848 .ndo_open
= e1000_open
,
849 .ndo_stop
= e1000_close
,
850 .ndo_start_xmit
= e1000_xmit_frame
,
851 .ndo_get_stats
= e1000_get_stats
,
852 .ndo_set_rx_mode
= e1000_set_rx_mode
,
853 .ndo_set_mac_address
= e1000_set_mac
,
854 .ndo_tx_timeout
= e1000_tx_timeout
,
855 .ndo_change_mtu
= e1000_change_mtu
,
856 .ndo_do_ioctl
= e1000_ioctl
,
857 .ndo_validate_addr
= eth_validate_addr
,
858 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
859 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
860 #ifdef CONFIG_NET_POLL_CONTROLLER
861 .ndo_poll_controller
= e1000_netpoll
,
863 .ndo_fix_features
= e1000_fix_features
,
864 .ndo_set_features
= e1000_set_features
,
868 * e1000_init_hw_struct - initialize members of hw struct
869 * @adapter: board private struct
870 * @hw: structure used by e1000_hw.c
872 * Factors out initialization of the e1000_hw struct to its own function
873 * that can be called very early at init (just after struct allocation).
874 * Fields are initialized based on PCI device information and
875 * OS network device settings (MTU size).
876 * Returns negative error codes if MAC type setup fails.
878 static int e1000_init_hw_struct(struct e1000_adapter
*adapter
,
881 struct pci_dev
*pdev
= adapter
->pdev
;
883 /* PCI config space info */
884 hw
->vendor_id
= pdev
->vendor
;
885 hw
->device_id
= pdev
->device
;
886 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
887 hw
->subsystem_id
= pdev
->subsystem_device
;
888 hw
->revision_id
= pdev
->revision
;
890 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->pci_cmd_word
);
892 hw
->max_frame_size
= adapter
->netdev
->mtu
+
893 ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
894 hw
->min_frame_size
= MINIMUM_ETHERNET_FRAME_SIZE
;
896 /* identify the MAC */
897 if (e1000_set_mac_type(hw
)) {
898 e_err(probe
, "Unknown MAC Type\n");
902 switch (hw
->mac_type
) {
907 case e1000_82541_rev_2
:
908 case e1000_82547_rev_2
:
909 hw
->phy_init_script
= 1;
913 e1000_set_media_type(hw
);
914 e1000_get_bus_info(hw
);
916 hw
->wait_autoneg_complete
= false;
917 hw
->tbi_compatibility_en
= true;
918 hw
->adaptive_ifs
= true;
922 if (hw
->media_type
== e1000_media_type_copper
) {
923 hw
->mdix
= AUTO_ALL_MODES
;
924 hw
->disable_polarity_correction
= false;
925 hw
->master_slave
= E1000_MASTER_SLAVE
;
932 * e1000_probe - Device Initialization Routine
933 * @pdev: PCI device information struct
934 * @ent: entry in e1000_pci_tbl
936 * Returns 0 on success, negative on failure
938 * e1000_probe initializes an adapter identified by a pci_dev structure.
939 * The OS initialization, configuring of the adapter private structure,
940 * and a hardware reset occur.
942 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
943 const struct pci_device_id
*ent
)
945 struct net_device
*netdev
;
946 struct e1000_adapter
*adapter
;
949 static int cards_found
= 0;
950 static int global_quad_port_a
= 0; /* global ksp3 port a indication */
951 int i
, err
, pci_using_dac
;
954 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
955 int bars
, need_ioport
;
957 /* do not allocate ioport bars when not needed */
958 need_ioport
= e1000_is_need_ioport(pdev
);
960 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
961 err
= pci_enable_device(pdev
);
963 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
964 err
= pci_enable_device_mem(pdev
);
969 err
= pci_request_selected_regions(pdev
, bars
, e1000_driver_name
);
973 pci_set_master(pdev
);
974 err
= pci_save_state(pdev
);
976 goto err_alloc_etherdev
;
979 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
981 goto err_alloc_etherdev
;
983 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
985 pci_set_drvdata(pdev
, netdev
);
986 adapter
= netdev_priv(netdev
);
987 adapter
->netdev
= netdev
;
988 adapter
->pdev
= pdev
;
989 adapter
->msg_enable
= (1 << debug
) - 1;
990 adapter
->bars
= bars
;
991 adapter
->need_ioport
= need_ioport
;
997 hw
->hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
1001 if (adapter
->need_ioport
) {
1002 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
1003 if (pci_resource_len(pdev
, i
) == 0)
1005 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
1006 hw
->io_base
= pci_resource_start(pdev
, i
);
1012 /* make ready for any if (hw->...) below */
1013 err
= e1000_init_hw_struct(adapter
, hw
);
1018 * there is a workaround being applied below that limits
1019 * 64-bit DMA addresses to 64-bit hardware. There are some
1020 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1023 if ((hw
->bus_type
== e1000_bus_type_pcix
) &&
1024 !dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64))) {
1026 * according to DMA-API-HOWTO, coherent calls will always
1027 * succeed if the set call did
1029 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
1032 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1034 pr_err("No usable DMA config, aborting\n");
1037 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1040 netdev
->netdev_ops
= &e1000_netdev_ops
;
1041 e1000_set_ethtool_ops(netdev
);
1042 netdev
->watchdog_timeo
= 5 * HZ
;
1043 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
1045 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
1047 adapter
->bd_number
= cards_found
;
1049 /* setup the private structure */
1051 err
= e1000_sw_init(adapter
);
1056 if (hw
->mac_type
== e1000_ce4100
) {
1057 ce4100_gbe_mdio_base_phy
= pci_resource_start(pdev
, BAR_1
);
1058 ce4100_gbe_mdio_base_virt
= ioremap(ce4100_gbe_mdio_base_phy
,
1059 pci_resource_len(pdev
, BAR_1
));
1061 if (!ce4100_gbe_mdio_base_virt
)
1062 goto err_mdio_ioremap
;
1065 if (hw
->mac_type
>= e1000_82543
) {
1066 netdev
->hw_features
= NETIF_F_SG
|
1069 netdev
->features
= NETIF_F_HW_VLAN_TX
|
1070 NETIF_F_HW_VLAN_FILTER
;
1073 if ((hw
->mac_type
>= e1000_82544
) &&
1074 (hw
->mac_type
!= e1000_82547
))
1075 netdev
->hw_features
|= NETIF_F_TSO
;
1077 netdev
->features
|= netdev
->hw_features
;
1078 netdev
->hw_features
|= NETIF_F_RXCSUM
;
1080 if (pci_using_dac
) {
1081 netdev
->features
|= NETIF_F_HIGHDMA
;
1082 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
1085 netdev
->vlan_features
|= NETIF_F_TSO
;
1086 netdev
->vlan_features
|= NETIF_F_HW_CSUM
;
1087 netdev
->vlan_features
|= NETIF_F_SG
;
1089 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
1091 adapter
->en_mng_pt
= e1000_enable_mng_pass_thru(hw
);
1093 /* initialize eeprom parameters */
1094 if (e1000_init_eeprom_params(hw
)) {
1095 e_err(probe
, "EEPROM initialization failed\n");
1099 /* before reading the EEPROM, reset the controller to
1100 * put the device in a known good starting state */
1104 /* make sure the EEPROM is good */
1105 if (e1000_validate_eeprom_checksum(hw
) < 0) {
1106 e_err(probe
, "The EEPROM Checksum Is Not Valid\n");
1107 e1000_dump_eeprom(adapter
);
1109 * set MAC address to all zeroes to invalidate and temporary
1110 * disable this device for the user. This blocks regular
1111 * traffic while still permitting ethtool ioctls from reaching
1112 * the hardware as well as allowing the user to run the
1113 * interface after manually setting a hw addr using
1116 memset(hw
->mac_addr
, 0, netdev
->addr_len
);
1118 /* copy the MAC address out of the EEPROM */
1119 if (e1000_read_mac_addr(hw
))
1120 e_err(probe
, "EEPROM Read Error\n");
1122 /* don't block initalization here due to bad MAC address */
1123 memcpy(netdev
->dev_addr
, hw
->mac_addr
, netdev
->addr_len
);
1124 memcpy(netdev
->perm_addr
, hw
->mac_addr
, netdev
->addr_len
);
1126 if (!is_valid_ether_addr(netdev
->perm_addr
))
1127 e_err(probe
, "Invalid MAC Address\n");
1130 INIT_DELAYED_WORK(&adapter
->watchdog_task
, e1000_watchdog
);
1131 INIT_DELAYED_WORK(&adapter
->fifo_stall_task
,
1132 e1000_82547_tx_fifo_stall_task
);
1133 INIT_DELAYED_WORK(&adapter
->phy_info_task
, e1000_update_phy_info_task
);
1134 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
1136 e1000_check_options(adapter
);
1138 /* Initial Wake on LAN setting
1139 * If APM wake is enabled in the EEPROM,
1140 * enable the ACPI Magic Packet filter
1143 switch (hw
->mac_type
) {
1144 case e1000_82542_rev2_0
:
1145 case e1000_82542_rev2_1
:
1149 e1000_read_eeprom(hw
,
1150 EEPROM_INIT_CONTROL2_REG
, 1, &eeprom_data
);
1151 eeprom_apme_mask
= E1000_EEPROM_82544_APM
;
1154 case e1000_82546_rev_3
:
1155 if (er32(STATUS
) & E1000_STATUS_FUNC_1
){
1156 e1000_read_eeprom(hw
,
1157 EEPROM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
1162 e1000_read_eeprom(hw
,
1163 EEPROM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1166 if (eeprom_data
& eeprom_apme_mask
)
1167 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1169 /* now that we have the eeprom settings, apply the special cases
1170 * where the eeprom may be wrong or the board simply won't support
1171 * wake on lan on a particular port */
1172 switch (pdev
->device
) {
1173 case E1000_DEV_ID_82546GB_PCIE
:
1174 adapter
->eeprom_wol
= 0;
1176 case E1000_DEV_ID_82546EB_FIBER
:
1177 case E1000_DEV_ID_82546GB_FIBER
:
1178 /* Wake events only supported on port A for dual fiber
1179 * regardless of eeprom setting */
1180 if (er32(STATUS
) & E1000_STATUS_FUNC_1
)
1181 adapter
->eeprom_wol
= 0;
1183 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3
:
1184 /* if quad port adapter, disable WoL on all but port A */
1185 if (global_quad_port_a
!= 0)
1186 adapter
->eeprom_wol
= 0;
1188 adapter
->quad_port_a
= true;
1189 /* Reset for multiple quad port adapters */
1190 if (++global_quad_port_a
== 4)
1191 global_quad_port_a
= 0;
1195 /* initialize the wol settings based on the eeprom settings */
1196 adapter
->wol
= adapter
->eeprom_wol
;
1197 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1199 /* Auto detect PHY address */
1200 if (hw
->mac_type
== e1000_ce4100
) {
1201 for (i
= 0; i
< 32; i
++) {
1203 e1000_read_phy_reg(hw
, PHY_ID2
, &tmp
);
1204 if (tmp
== 0 || tmp
== 0xFF) {
1213 /* reset the hardware with the new settings */
1214 e1000_reset(adapter
);
1216 strcpy(netdev
->name
, "eth%d");
1217 err
= register_netdev(netdev
);
1221 e1000_vlan_mode(netdev
, netdev
->features
);
1223 /* print bus type/speed/width info */
1224 e_info(probe
, "(PCI%s:%dMHz:%d-bit) %pM\n",
1225 ((hw
->bus_type
== e1000_bus_type_pcix
) ? "-X" : ""),
1226 ((hw
->bus_speed
== e1000_bus_speed_133
) ? 133 :
1227 (hw
->bus_speed
== e1000_bus_speed_120
) ? 120 :
1228 (hw
->bus_speed
== e1000_bus_speed_100
) ? 100 :
1229 (hw
->bus_speed
== e1000_bus_speed_66
) ? 66 : 33),
1230 ((hw
->bus_width
== e1000_bus_width_64
) ? 64 : 32),
1233 /* carrier off reporting is important to ethtool even BEFORE open */
1234 netif_carrier_off(netdev
);
1236 e_info(probe
, "Intel(R) PRO/1000 Network Connection\n");
1243 e1000_phy_hw_reset(hw
);
1245 if (hw
->flash_address
)
1246 iounmap(hw
->flash_address
);
1247 kfree(adapter
->tx_ring
);
1248 kfree(adapter
->rx_ring
);
1252 iounmap(ce4100_gbe_mdio_base_virt
);
1253 iounmap(hw
->hw_addr
);
1255 free_netdev(netdev
);
1257 pci_release_selected_regions(pdev
, bars
);
1259 pci_disable_device(pdev
);
1264 * e1000_remove - Device Removal Routine
1265 * @pdev: PCI device information struct
1267 * e1000_remove is called by the PCI subsystem to alert the driver
1268 * that it should release a PCI device. The could be caused by a
1269 * Hot-Plug event, or because the driver is going to be removed from
1273 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
1275 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1276 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1277 struct e1000_hw
*hw
= &adapter
->hw
;
1279 e1000_down_and_stop(adapter
);
1280 e1000_release_manageability(adapter
);
1282 unregister_netdev(netdev
);
1284 e1000_phy_hw_reset(hw
);
1286 kfree(adapter
->tx_ring
);
1287 kfree(adapter
->rx_ring
);
1289 iounmap(hw
->hw_addr
);
1290 if (hw
->flash_address
)
1291 iounmap(hw
->flash_address
);
1292 pci_release_selected_regions(pdev
, adapter
->bars
);
1294 free_netdev(netdev
);
1296 pci_disable_device(pdev
);
1300 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1301 * @adapter: board private structure to initialize
1303 * e1000_sw_init initializes the Adapter private data structure.
1304 * e1000_init_hw_struct MUST be called before this function
1307 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
1309 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1311 adapter
->num_tx_queues
= 1;
1312 adapter
->num_rx_queues
= 1;
1314 if (e1000_alloc_queues(adapter
)) {
1315 e_err(probe
, "Unable to allocate memory for queues\n");
1319 /* Explicitly disable IRQ since the NIC can be in any state. */
1320 e1000_irq_disable(adapter
);
1322 spin_lock_init(&adapter
->stats_lock
);
1323 mutex_init(&adapter
->mutex
);
1325 set_bit(__E1000_DOWN
, &adapter
->flags
);
1331 * e1000_alloc_queues - Allocate memory for all rings
1332 * @adapter: board private structure to initialize
1334 * We allocate one ring per queue at run-time since we don't know the
1335 * number of queues at compile-time.
1338 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1340 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
1341 sizeof(struct e1000_tx_ring
), GFP_KERNEL
);
1342 if (!adapter
->tx_ring
)
1345 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
1346 sizeof(struct e1000_rx_ring
), GFP_KERNEL
);
1347 if (!adapter
->rx_ring
) {
1348 kfree(adapter
->tx_ring
);
1352 return E1000_SUCCESS
;
1356 * e1000_open - Called when a network interface is made active
1357 * @netdev: network interface device structure
1359 * Returns 0 on success, negative value on failure
1361 * The open entry point is called when a network interface is made
1362 * active by the system (IFF_UP). At this point all resources needed
1363 * for transmit and receive operations are allocated, the interrupt
1364 * handler is registered with the OS, the watchdog task is started,
1365 * and the stack is notified that the interface is ready.
1368 static int e1000_open(struct net_device
*netdev
)
1370 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1371 struct e1000_hw
*hw
= &adapter
->hw
;
1374 /* disallow open during test */
1375 if (test_bit(__E1000_TESTING
, &adapter
->flags
))
1378 netif_carrier_off(netdev
);
1380 /* allocate transmit descriptors */
1381 err
= e1000_setup_all_tx_resources(adapter
);
1385 /* allocate receive descriptors */
1386 err
= e1000_setup_all_rx_resources(adapter
);
1390 e1000_power_up_phy(adapter
);
1392 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
1393 if ((hw
->mng_cookie
.status
&
1394 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
)) {
1395 e1000_update_mng_vlan(adapter
);
1398 /* before we allocate an interrupt, we must be ready to handle it.
1399 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1400 * as soon as we call pci_request_irq, so we have to setup our
1401 * clean_rx handler before we do so. */
1402 e1000_configure(adapter
);
1404 err
= e1000_request_irq(adapter
);
1408 /* From here on the code is the same as e1000_up() */
1409 clear_bit(__E1000_DOWN
, &adapter
->flags
);
1411 napi_enable(&adapter
->napi
);
1413 e1000_irq_enable(adapter
);
1415 netif_start_queue(netdev
);
1417 /* fire a link status change interrupt to start the watchdog */
1418 ew32(ICS
, E1000_ICS_LSC
);
1420 return E1000_SUCCESS
;
1423 e1000_power_down_phy(adapter
);
1424 e1000_free_all_rx_resources(adapter
);
1426 e1000_free_all_tx_resources(adapter
);
1428 e1000_reset(adapter
);
1434 * e1000_close - Disables a network interface
1435 * @netdev: network interface device structure
1437 * Returns 0, this is not allowed to fail
1439 * The close entry point is called when an interface is de-activated
1440 * by the OS. The hardware is still under the drivers control, but
1441 * needs to be disabled. A global MAC reset is issued to stop the
1442 * hardware, and all transmit and receive resources are freed.
1445 static int e1000_close(struct net_device
*netdev
)
1447 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1448 struct e1000_hw
*hw
= &adapter
->hw
;
1450 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
1451 e1000_down(adapter
);
1452 e1000_power_down_phy(adapter
);
1453 e1000_free_irq(adapter
);
1455 e1000_free_all_tx_resources(adapter
);
1456 e1000_free_all_rx_resources(adapter
);
1458 /* kill manageability vlan ID if supported, but not if a vlan with
1459 * the same ID is registered on the host OS (let 8021q kill it) */
1460 if ((hw
->mng_cookie
.status
&
1461 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
1462 !test_bit(adapter
->mng_vlan_id
, adapter
->active_vlans
)) {
1463 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1470 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1471 * @adapter: address of board private structure
1472 * @start: address of beginning of memory
1473 * @len: length of memory
1475 static bool e1000_check_64k_bound(struct e1000_adapter
*adapter
, void *start
,
1478 struct e1000_hw
*hw
= &adapter
->hw
;
1479 unsigned long begin
= (unsigned long)start
;
1480 unsigned long end
= begin
+ len
;
1482 /* First rev 82545 and 82546 need to not allow any memory
1483 * write location to cross 64k boundary due to errata 23 */
1484 if (hw
->mac_type
== e1000_82545
||
1485 hw
->mac_type
== e1000_ce4100
||
1486 hw
->mac_type
== e1000_82546
) {
1487 return ((begin
^ (end
- 1)) >> 16) != 0 ? false : true;
1494 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1495 * @adapter: board private structure
1496 * @txdr: tx descriptor ring (for a specific queue) to setup
1498 * Return 0 on success, negative on failure
1501 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
1502 struct e1000_tx_ring
*txdr
)
1504 struct pci_dev
*pdev
= adapter
->pdev
;
1507 size
= sizeof(struct e1000_buffer
) * txdr
->count
;
1508 txdr
->buffer_info
= vzalloc(size
);
1509 if (!txdr
->buffer_info
) {
1510 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1515 /* round up to nearest 4K */
1517 txdr
->size
= txdr
->count
* sizeof(struct e1000_tx_desc
);
1518 txdr
->size
= ALIGN(txdr
->size
, 4096);
1520 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
1524 vfree(txdr
->buffer_info
);
1525 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1530 /* Fix for errata 23, can't cross 64kB boundary */
1531 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1532 void *olddesc
= txdr
->desc
;
1533 dma_addr_t olddma
= txdr
->dma
;
1534 e_err(tx_err
, "txdr align check failed: %u bytes at %p\n",
1535 txdr
->size
, txdr
->desc
);
1536 /* Try again, without freeing the previous */
1537 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
,
1538 &txdr
->dma
, GFP_KERNEL
);
1539 /* Failed allocation, critical failure */
1541 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1543 goto setup_tx_desc_die
;
1546 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1548 dma_free_coherent(&pdev
->dev
, txdr
->size
, txdr
->desc
,
1550 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1552 e_err(probe
, "Unable to allocate aligned memory "
1553 "for the transmit descriptor ring\n");
1554 vfree(txdr
->buffer_info
);
1557 /* Free old allocation, new allocation was successful */
1558 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1562 memset(txdr
->desc
, 0, txdr
->size
);
1564 txdr
->next_to_use
= 0;
1565 txdr
->next_to_clean
= 0;
1571 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1572 * (Descriptors) for all queues
1573 * @adapter: board private structure
1575 * Return 0 on success, negative on failure
1578 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
)
1582 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1583 err
= e1000_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1585 e_err(probe
, "Allocation for Tx Queue %u failed\n", i
);
1586 for (i
-- ; i
>= 0; i
--)
1587 e1000_free_tx_resources(adapter
,
1588 &adapter
->tx_ring
[i
]);
1597 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1598 * @adapter: board private structure
1600 * Configure the Tx unit of the MAC after a reset.
1603 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
1606 struct e1000_hw
*hw
= &adapter
->hw
;
1607 u32 tdlen
, tctl
, tipg
;
1610 /* Setup the HW Tx Head and Tail descriptor pointers */
1612 switch (adapter
->num_tx_queues
) {
1615 tdba
= adapter
->tx_ring
[0].dma
;
1616 tdlen
= adapter
->tx_ring
[0].count
*
1617 sizeof(struct e1000_tx_desc
);
1619 ew32(TDBAH
, (tdba
>> 32));
1620 ew32(TDBAL
, (tdba
& 0x00000000ffffffffULL
));
1623 adapter
->tx_ring
[0].tdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDH
: E1000_82542_TDH
);
1624 adapter
->tx_ring
[0].tdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDT
: E1000_82542_TDT
);
1628 /* Set the default values for the Tx Inter Packet Gap timer */
1629 if ((hw
->media_type
== e1000_media_type_fiber
||
1630 hw
->media_type
== e1000_media_type_internal_serdes
))
1631 tipg
= DEFAULT_82543_TIPG_IPGT_FIBER
;
1633 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
;
1635 switch (hw
->mac_type
) {
1636 case e1000_82542_rev2_0
:
1637 case e1000_82542_rev2_1
:
1638 tipg
= DEFAULT_82542_TIPG_IPGT
;
1639 ipgr1
= DEFAULT_82542_TIPG_IPGR1
;
1640 ipgr2
= DEFAULT_82542_TIPG_IPGR2
;
1643 ipgr1
= DEFAULT_82543_TIPG_IPGR1
;
1644 ipgr2
= DEFAULT_82543_TIPG_IPGR2
;
1647 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
1648 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
1651 /* Set the Tx Interrupt Delay register */
1653 ew32(TIDV
, adapter
->tx_int_delay
);
1654 if (hw
->mac_type
>= e1000_82540
)
1655 ew32(TADV
, adapter
->tx_abs_int_delay
);
1657 /* Program the Transmit Control Register */
1660 tctl
&= ~E1000_TCTL_CT
;
1661 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1662 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1664 e1000_config_collision_dist(hw
);
1666 /* Setup Transmit Descriptor Settings for eop descriptor */
1667 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
1669 /* only set IDE if we are delaying interrupts using the timers */
1670 if (adapter
->tx_int_delay
)
1671 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
1673 if (hw
->mac_type
< e1000_82543
)
1674 adapter
->txd_cmd
|= E1000_TXD_CMD_RPS
;
1676 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
1678 /* Cache if we're 82544 running in PCI-X because we'll
1679 * need this to apply a workaround later in the send path. */
1680 if (hw
->mac_type
== e1000_82544
&&
1681 hw
->bus_type
== e1000_bus_type_pcix
)
1682 adapter
->pcix_82544
= true;
1689 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1690 * @adapter: board private structure
1691 * @rxdr: rx descriptor ring (for a specific queue) to setup
1693 * Returns 0 on success, negative on failure
1696 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
1697 struct e1000_rx_ring
*rxdr
)
1699 struct pci_dev
*pdev
= adapter
->pdev
;
1702 size
= sizeof(struct e1000_buffer
) * rxdr
->count
;
1703 rxdr
->buffer_info
= vzalloc(size
);
1704 if (!rxdr
->buffer_info
) {
1705 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1710 desc_len
= sizeof(struct e1000_rx_desc
);
1712 /* Round up to nearest 4K */
1714 rxdr
->size
= rxdr
->count
* desc_len
;
1715 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
1717 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
1721 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1724 vfree(rxdr
->buffer_info
);
1728 /* Fix for errata 23, can't cross 64kB boundary */
1729 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1730 void *olddesc
= rxdr
->desc
;
1731 dma_addr_t olddma
= rxdr
->dma
;
1732 e_err(rx_err
, "rxdr align check failed: %u bytes at %p\n",
1733 rxdr
->size
, rxdr
->desc
);
1734 /* Try again, without freeing the previous */
1735 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
,
1736 &rxdr
->dma
, GFP_KERNEL
);
1737 /* Failed allocation, critical failure */
1739 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1741 e_err(probe
, "Unable to allocate memory for the Rx "
1742 "descriptor ring\n");
1743 goto setup_rx_desc_die
;
1746 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1748 dma_free_coherent(&pdev
->dev
, rxdr
->size
, rxdr
->desc
,
1750 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1752 e_err(probe
, "Unable to allocate aligned memory for "
1753 "the Rx descriptor ring\n");
1754 goto setup_rx_desc_die
;
1756 /* Free old allocation, new allocation was successful */
1757 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1761 memset(rxdr
->desc
, 0, rxdr
->size
);
1763 rxdr
->next_to_clean
= 0;
1764 rxdr
->next_to_use
= 0;
1765 rxdr
->rx_skb_top
= NULL
;
1771 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1772 * (Descriptors) for all queues
1773 * @adapter: board private structure
1775 * Return 0 on success, negative on failure
1778 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
)
1782 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1783 err
= e1000_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1785 e_err(probe
, "Allocation for Rx Queue %u failed\n", i
);
1786 for (i
-- ; i
>= 0; i
--)
1787 e1000_free_rx_resources(adapter
,
1788 &adapter
->rx_ring
[i
]);
1797 * e1000_setup_rctl - configure the receive control registers
1798 * @adapter: Board private structure
1800 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
1802 struct e1000_hw
*hw
= &adapter
->hw
;
1807 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1809 rctl
|= E1000_RCTL_BAM
| E1000_RCTL_LBM_NO
|
1810 E1000_RCTL_RDMTS_HALF
|
1811 (hw
->mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1813 if (hw
->tbi_compatibility_on
== 1)
1814 rctl
|= E1000_RCTL_SBP
;
1816 rctl
&= ~E1000_RCTL_SBP
;
1818 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1819 rctl
&= ~E1000_RCTL_LPE
;
1821 rctl
|= E1000_RCTL_LPE
;
1823 /* Setup buffer sizes */
1824 rctl
&= ~E1000_RCTL_SZ_4096
;
1825 rctl
|= E1000_RCTL_BSEX
;
1826 switch (adapter
->rx_buffer_len
) {
1827 case E1000_RXBUFFER_2048
:
1829 rctl
|= E1000_RCTL_SZ_2048
;
1830 rctl
&= ~E1000_RCTL_BSEX
;
1832 case E1000_RXBUFFER_4096
:
1833 rctl
|= E1000_RCTL_SZ_4096
;
1835 case E1000_RXBUFFER_8192
:
1836 rctl
|= E1000_RCTL_SZ_8192
;
1838 case E1000_RXBUFFER_16384
:
1839 rctl
|= E1000_RCTL_SZ_16384
;
1847 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1848 * @adapter: board private structure
1850 * Configure the Rx unit of the MAC after a reset.
1853 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
1856 struct e1000_hw
*hw
= &adapter
->hw
;
1857 u32 rdlen
, rctl
, rxcsum
;
1859 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1860 rdlen
= adapter
->rx_ring
[0].count
*
1861 sizeof(struct e1000_rx_desc
);
1862 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
1863 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
1865 rdlen
= adapter
->rx_ring
[0].count
*
1866 sizeof(struct e1000_rx_desc
);
1867 adapter
->clean_rx
= e1000_clean_rx_irq
;
1868 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
1871 /* disable receives while setting up the descriptors */
1873 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1875 /* set the Receive Delay Timer Register */
1876 ew32(RDTR
, adapter
->rx_int_delay
);
1878 if (hw
->mac_type
>= e1000_82540
) {
1879 ew32(RADV
, adapter
->rx_abs_int_delay
);
1880 if (adapter
->itr_setting
!= 0)
1881 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
1884 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1885 * the Base and Length of the Rx Descriptor Ring */
1886 switch (adapter
->num_rx_queues
) {
1889 rdba
= adapter
->rx_ring
[0].dma
;
1891 ew32(RDBAH
, (rdba
>> 32));
1892 ew32(RDBAL
, (rdba
& 0x00000000ffffffffULL
));
1895 adapter
->rx_ring
[0].rdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDH
: E1000_82542_RDH
);
1896 adapter
->rx_ring
[0].rdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDT
: E1000_82542_RDT
);
1900 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1901 if (hw
->mac_type
>= e1000_82543
) {
1902 rxcsum
= er32(RXCSUM
);
1903 if (adapter
->rx_csum
)
1904 rxcsum
|= E1000_RXCSUM_TUOFL
;
1906 /* don't need to clear IPPCSE as it defaults to 0 */
1907 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1908 ew32(RXCSUM
, rxcsum
);
1911 /* Enable Receives */
1912 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
1916 * e1000_free_tx_resources - Free Tx Resources per Queue
1917 * @adapter: board private structure
1918 * @tx_ring: Tx descriptor ring for a specific queue
1920 * Free all transmit software resources
1923 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
1924 struct e1000_tx_ring
*tx_ring
)
1926 struct pci_dev
*pdev
= adapter
->pdev
;
1928 e1000_clean_tx_ring(adapter
, tx_ring
);
1930 vfree(tx_ring
->buffer_info
);
1931 tx_ring
->buffer_info
= NULL
;
1933 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1936 tx_ring
->desc
= NULL
;
1940 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1941 * @adapter: board private structure
1943 * Free all transmit software resources
1946 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
)
1950 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1951 e1000_free_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1954 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter
*adapter
,
1955 struct e1000_buffer
*buffer_info
)
1957 if (buffer_info
->dma
) {
1958 if (buffer_info
->mapped_as_page
)
1959 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1960 buffer_info
->length
, DMA_TO_DEVICE
);
1962 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1963 buffer_info
->length
,
1965 buffer_info
->dma
= 0;
1967 if (buffer_info
->skb
) {
1968 dev_kfree_skb_any(buffer_info
->skb
);
1969 buffer_info
->skb
= NULL
;
1971 buffer_info
->time_stamp
= 0;
1972 /* buffer_info must be completely set up in the transmit path */
1976 * e1000_clean_tx_ring - Free Tx Buffers
1977 * @adapter: board private structure
1978 * @tx_ring: ring to be cleaned
1981 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
1982 struct e1000_tx_ring
*tx_ring
)
1984 struct e1000_hw
*hw
= &adapter
->hw
;
1985 struct e1000_buffer
*buffer_info
;
1989 /* Free all the Tx ring sk_buffs */
1991 for (i
= 0; i
< tx_ring
->count
; i
++) {
1992 buffer_info
= &tx_ring
->buffer_info
[i
];
1993 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
1996 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1997 memset(tx_ring
->buffer_info
, 0, size
);
1999 /* Zero out the descriptor ring */
2001 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2003 tx_ring
->next_to_use
= 0;
2004 tx_ring
->next_to_clean
= 0;
2005 tx_ring
->last_tx_tso
= false;
2007 writel(0, hw
->hw_addr
+ tx_ring
->tdh
);
2008 writel(0, hw
->hw_addr
+ tx_ring
->tdt
);
2012 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2013 * @adapter: board private structure
2016 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
)
2020 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2021 e1000_clean_tx_ring(adapter
, &adapter
->tx_ring
[i
]);
2025 * e1000_free_rx_resources - Free Rx Resources
2026 * @adapter: board private structure
2027 * @rx_ring: ring to clean the resources from
2029 * Free all receive software resources
2032 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
2033 struct e1000_rx_ring
*rx_ring
)
2035 struct pci_dev
*pdev
= adapter
->pdev
;
2037 e1000_clean_rx_ring(adapter
, rx_ring
);
2039 vfree(rx_ring
->buffer_info
);
2040 rx_ring
->buffer_info
= NULL
;
2042 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
2045 rx_ring
->desc
= NULL
;
2049 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2050 * @adapter: board private structure
2052 * Free all receive software resources
2055 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
)
2059 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2060 e1000_free_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
2064 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2065 * @adapter: board private structure
2066 * @rx_ring: ring to free buffers from
2069 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
2070 struct e1000_rx_ring
*rx_ring
)
2072 struct e1000_hw
*hw
= &adapter
->hw
;
2073 struct e1000_buffer
*buffer_info
;
2074 struct pci_dev
*pdev
= adapter
->pdev
;
2078 /* Free all the Rx ring sk_buffs */
2079 for (i
= 0; i
< rx_ring
->count
; i
++) {
2080 buffer_info
= &rx_ring
->buffer_info
[i
];
2081 if (buffer_info
->dma
&&
2082 adapter
->clean_rx
== e1000_clean_rx_irq
) {
2083 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
2084 buffer_info
->length
,
2086 } else if (buffer_info
->dma
&&
2087 adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
) {
2088 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
2089 buffer_info
->length
,
2093 buffer_info
->dma
= 0;
2094 if (buffer_info
->page
) {
2095 put_page(buffer_info
->page
);
2096 buffer_info
->page
= NULL
;
2098 if (buffer_info
->skb
) {
2099 dev_kfree_skb(buffer_info
->skb
);
2100 buffer_info
->skb
= NULL
;
2104 /* there also may be some cached data from a chained receive */
2105 if (rx_ring
->rx_skb_top
) {
2106 dev_kfree_skb(rx_ring
->rx_skb_top
);
2107 rx_ring
->rx_skb_top
= NULL
;
2110 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
2111 memset(rx_ring
->buffer_info
, 0, size
);
2113 /* Zero out the descriptor ring */
2114 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2116 rx_ring
->next_to_clean
= 0;
2117 rx_ring
->next_to_use
= 0;
2119 writel(0, hw
->hw_addr
+ rx_ring
->rdh
);
2120 writel(0, hw
->hw_addr
+ rx_ring
->rdt
);
2124 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2125 * @adapter: board private structure
2128 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
)
2132 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2133 e1000_clean_rx_ring(adapter
, &adapter
->rx_ring
[i
]);
2136 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2137 * and memory write and invalidate disabled for certain operations
2139 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
)
2141 struct e1000_hw
*hw
= &adapter
->hw
;
2142 struct net_device
*netdev
= adapter
->netdev
;
2145 e1000_pci_clear_mwi(hw
);
2148 rctl
|= E1000_RCTL_RST
;
2150 E1000_WRITE_FLUSH();
2153 if (netif_running(netdev
))
2154 e1000_clean_all_rx_rings(adapter
);
2157 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
)
2159 struct e1000_hw
*hw
= &adapter
->hw
;
2160 struct net_device
*netdev
= adapter
->netdev
;
2164 rctl
&= ~E1000_RCTL_RST
;
2166 E1000_WRITE_FLUSH();
2169 if (hw
->pci_cmd_word
& PCI_COMMAND_INVALIDATE
)
2170 e1000_pci_set_mwi(hw
);
2172 if (netif_running(netdev
)) {
2173 /* No need to loop, because 82542 supports only 1 queue */
2174 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[0];
2175 e1000_configure_rx(adapter
);
2176 adapter
->alloc_rx_buf(adapter
, ring
, E1000_DESC_UNUSED(ring
));
2181 * e1000_set_mac - Change the Ethernet Address of the NIC
2182 * @netdev: network interface device structure
2183 * @p: pointer to an address structure
2185 * Returns 0 on success, negative on failure
2188 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
2190 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2191 struct e1000_hw
*hw
= &adapter
->hw
;
2192 struct sockaddr
*addr
= p
;
2194 if (!is_valid_ether_addr(addr
->sa_data
))
2195 return -EADDRNOTAVAIL
;
2197 /* 82542 2.0 needs to be in reset to write receive address registers */
2199 if (hw
->mac_type
== e1000_82542_rev2_0
)
2200 e1000_enter_82542_rst(adapter
);
2202 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2203 memcpy(hw
->mac_addr
, addr
->sa_data
, netdev
->addr_len
);
2205 e1000_rar_set(hw
, hw
->mac_addr
, 0);
2207 if (hw
->mac_type
== e1000_82542_rev2_0
)
2208 e1000_leave_82542_rst(adapter
);
2214 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2215 * @netdev: network interface device structure
2217 * The set_rx_mode entry point is called whenever the unicast or multicast
2218 * address lists or the network interface flags are updated. This routine is
2219 * responsible for configuring the hardware for proper unicast, multicast,
2220 * promiscuous mode, and all-multi behavior.
2223 static void e1000_set_rx_mode(struct net_device
*netdev
)
2225 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2226 struct e1000_hw
*hw
= &adapter
->hw
;
2227 struct netdev_hw_addr
*ha
;
2228 bool use_uc
= false;
2231 int i
, rar_entries
= E1000_RAR_ENTRIES
;
2232 int mta_reg_count
= E1000_NUM_MTA_REGISTERS
;
2233 u32
*mcarray
= kcalloc(mta_reg_count
, sizeof(u32
), GFP_ATOMIC
);
2236 e_err(probe
, "memory allocation failed\n");
2240 /* Check for Promiscuous and All Multicast modes */
2244 if (netdev
->flags
& IFF_PROMISC
) {
2245 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2246 rctl
&= ~E1000_RCTL_VFE
;
2248 if (netdev
->flags
& IFF_ALLMULTI
)
2249 rctl
|= E1000_RCTL_MPE
;
2251 rctl
&= ~E1000_RCTL_MPE
;
2252 /* Enable VLAN filter if there is a VLAN */
2253 if (e1000_vlan_used(adapter
))
2254 rctl
|= E1000_RCTL_VFE
;
2257 if (netdev_uc_count(netdev
) > rar_entries
- 1) {
2258 rctl
|= E1000_RCTL_UPE
;
2259 } else if (!(netdev
->flags
& IFF_PROMISC
)) {
2260 rctl
&= ~E1000_RCTL_UPE
;
2266 /* 82542 2.0 needs to be in reset to write receive address registers */
2268 if (hw
->mac_type
== e1000_82542_rev2_0
)
2269 e1000_enter_82542_rst(adapter
);
2271 /* load the first 14 addresses into the exact filters 1-14. Unicast
2272 * addresses take precedence to avoid disabling unicast filtering
2275 * RAR 0 is used for the station MAC address
2276 * if there are not 14 addresses, go ahead and clear the filters
2280 netdev_for_each_uc_addr(ha
, netdev
) {
2281 if (i
== rar_entries
)
2283 e1000_rar_set(hw
, ha
->addr
, i
++);
2286 netdev_for_each_mc_addr(ha
, netdev
) {
2287 if (i
== rar_entries
) {
2288 /* load any remaining addresses into the hash table */
2289 u32 hash_reg
, hash_bit
, mta
;
2290 hash_value
= e1000_hash_mc_addr(hw
, ha
->addr
);
2291 hash_reg
= (hash_value
>> 5) & 0x7F;
2292 hash_bit
= hash_value
& 0x1F;
2293 mta
= (1 << hash_bit
);
2294 mcarray
[hash_reg
] |= mta
;
2296 e1000_rar_set(hw
, ha
->addr
, i
++);
2300 for (; i
< rar_entries
; i
++) {
2301 E1000_WRITE_REG_ARRAY(hw
, RA
, i
<< 1, 0);
2302 E1000_WRITE_FLUSH();
2303 E1000_WRITE_REG_ARRAY(hw
, RA
, (i
<< 1) + 1, 0);
2304 E1000_WRITE_FLUSH();
2307 /* write the hash table completely, write from bottom to avoid
2308 * both stupid write combining chipsets, and flushing each write */
2309 for (i
= mta_reg_count
- 1; i
>= 0 ; i
--) {
2311 * If we are on an 82544 has an errata where writing odd
2312 * offsets overwrites the previous even offset, but writing
2313 * backwards over the range solves the issue by always
2314 * writing the odd offset first
2316 E1000_WRITE_REG_ARRAY(hw
, MTA
, i
, mcarray
[i
]);
2318 E1000_WRITE_FLUSH();
2320 if (hw
->mac_type
== e1000_82542_rev2_0
)
2321 e1000_leave_82542_rst(adapter
);
2327 * e1000_update_phy_info_task - get phy info
2328 * @work: work struct contained inside adapter struct
2330 * Need to wait a few seconds after link up to get diagnostic information from
2333 static void e1000_update_phy_info_task(struct work_struct
*work
)
2335 struct e1000_adapter
*adapter
= container_of(work
,
2336 struct e1000_adapter
,
2337 phy_info_task
.work
);
2338 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2340 mutex_lock(&adapter
->mutex
);
2341 e1000_phy_get_info(&adapter
->hw
, &adapter
->phy_info
);
2342 mutex_unlock(&adapter
->mutex
);
2346 * e1000_82547_tx_fifo_stall_task - task to complete work
2347 * @work: work struct contained inside adapter struct
2349 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
)
2351 struct e1000_adapter
*adapter
= container_of(work
,
2352 struct e1000_adapter
,
2353 fifo_stall_task
.work
);
2354 struct e1000_hw
*hw
= &adapter
->hw
;
2355 struct net_device
*netdev
= adapter
->netdev
;
2358 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2360 mutex_lock(&adapter
->mutex
);
2361 if (atomic_read(&adapter
->tx_fifo_stall
)) {
2362 if ((er32(TDT
) == er32(TDH
)) &&
2363 (er32(TDFT
) == er32(TDFH
)) &&
2364 (er32(TDFTS
) == er32(TDFHS
))) {
2366 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
2367 ew32(TDFT
, adapter
->tx_head_addr
);
2368 ew32(TDFH
, adapter
->tx_head_addr
);
2369 ew32(TDFTS
, adapter
->tx_head_addr
);
2370 ew32(TDFHS
, adapter
->tx_head_addr
);
2372 E1000_WRITE_FLUSH();
2374 adapter
->tx_fifo_head
= 0;
2375 atomic_set(&adapter
->tx_fifo_stall
, 0);
2376 netif_wake_queue(netdev
);
2377 } else if (!test_bit(__E1000_DOWN
, &adapter
->flags
)) {
2378 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
2381 mutex_unlock(&adapter
->mutex
);
2384 bool e1000_has_link(struct e1000_adapter
*adapter
)
2386 struct e1000_hw
*hw
= &adapter
->hw
;
2387 bool link_active
= false;
2389 /* get_link_status is set on LSC (link status) interrupt or rx
2390 * sequence error interrupt (except on intel ce4100).
2391 * get_link_status will stay false until the
2392 * e1000_check_for_link establishes link for copper adapters
2395 switch (hw
->media_type
) {
2396 case e1000_media_type_copper
:
2397 if (hw
->mac_type
== e1000_ce4100
)
2398 hw
->get_link_status
= 1;
2399 if (hw
->get_link_status
) {
2400 e1000_check_for_link(hw
);
2401 link_active
= !hw
->get_link_status
;
2406 case e1000_media_type_fiber
:
2407 e1000_check_for_link(hw
);
2408 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
2410 case e1000_media_type_internal_serdes
:
2411 e1000_check_for_link(hw
);
2412 link_active
= hw
->serdes_has_link
;
2422 * e1000_watchdog - work function
2423 * @work: work struct contained inside adapter struct
2425 static void e1000_watchdog(struct work_struct
*work
)
2427 struct e1000_adapter
*adapter
= container_of(work
,
2428 struct e1000_adapter
,
2429 watchdog_task
.work
);
2430 struct e1000_hw
*hw
= &adapter
->hw
;
2431 struct net_device
*netdev
= adapter
->netdev
;
2432 struct e1000_tx_ring
*txdr
= adapter
->tx_ring
;
2435 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2438 mutex_lock(&adapter
->mutex
);
2439 link
= e1000_has_link(adapter
);
2440 if ((netif_carrier_ok(netdev
)) && link
)
2444 if (!netif_carrier_ok(netdev
)) {
2447 /* update snapshot of PHY registers on LSC */
2448 e1000_get_speed_and_duplex(hw
,
2449 &adapter
->link_speed
,
2450 &adapter
->link_duplex
);
2453 pr_info("%s NIC Link is Up %d Mbps %s, "
2454 "Flow Control: %s\n",
2456 adapter
->link_speed
,
2457 adapter
->link_duplex
== FULL_DUPLEX
?
2458 "Full Duplex" : "Half Duplex",
2459 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2460 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2461 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2462 E1000_CTRL_TFCE
) ? "TX" : "None")));
2464 /* adjust timeout factor according to speed/duplex */
2465 adapter
->tx_timeout_factor
= 1;
2466 switch (adapter
->link_speed
) {
2469 adapter
->tx_timeout_factor
= 16;
2473 /* maybe add some timeout factor ? */
2477 /* enable transmits in the hardware */
2479 tctl
|= E1000_TCTL_EN
;
2482 netif_carrier_on(netdev
);
2483 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2484 schedule_delayed_work(&adapter
->phy_info_task
,
2486 adapter
->smartspeed
= 0;
2489 if (netif_carrier_ok(netdev
)) {
2490 adapter
->link_speed
= 0;
2491 adapter
->link_duplex
= 0;
2492 pr_info("%s NIC Link is Down\n",
2494 netif_carrier_off(netdev
);
2496 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2497 schedule_delayed_work(&adapter
->phy_info_task
,
2501 e1000_smartspeed(adapter
);
2505 e1000_update_stats(adapter
);
2507 hw
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2508 adapter
->tpt_old
= adapter
->stats
.tpt
;
2509 hw
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2510 adapter
->colc_old
= adapter
->stats
.colc
;
2512 adapter
->gorcl
= adapter
->stats
.gorcl
- adapter
->gorcl_old
;
2513 adapter
->gorcl_old
= adapter
->stats
.gorcl
;
2514 adapter
->gotcl
= adapter
->stats
.gotcl
- adapter
->gotcl_old
;
2515 adapter
->gotcl_old
= adapter
->stats
.gotcl
;
2517 e1000_update_adaptive(hw
);
2519 if (!netif_carrier_ok(netdev
)) {
2520 if (E1000_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
2521 /* We've lost link, so the controller stops DMA,
2522 * but we've got queued Tx work that's never going
2523 * to get done, so reset controller to flush Tx.
2524 * (Do the reset outside of interrupt context). */
2525 adapter
->tx_timeout_count
++;
2526 schedule_work(&adapter
->reset_task
);
2527 /* exit immediately since reset is imminent */
2532 /* Simple mode for Interrupt Throttle Rate (ITR) */
2533 if (hw
->mac_type
>= e1000_82540
&& adapter
->itr_setting
== 4) {
2535 * Symmetric Tx/Rx gets a reduced ITR=2000;
2536 * Total asymmetrical Tx or Rx gets ITR=8000;
2537 * everyone else is between 2000-8000.
2539 u32 goc
= (adapter
->gotcl
+ adapter
->gorcl
) / 10000;
2540 u32 dif
= (adapter
->gotcl
> adapter
->gorcl
?
2541 adapter
->gotcl
- adapter
->gorcl
:
2542 adapter
->gorcl
- adapter
->gotcl
) / 10000;
2543 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
2545 ew32(ITR
, 1000000000 / (itr
* 256));
2548 /* Cause software interrupt to ensure rx ring is cleaned */
2549 ew32(ICS
, E1000_ICS_RXDMT0
);
2551 /* Force detection of hung controller every watchdog period */
2552 adapter
->detect_tx_hung
= true;
2554 /* Reschedule the task */
2555 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2556 schedule_delayed_work(&adapter
->watchdog_task
, 2 * HZ
);
2559 mutex_unlock(&adapter
->mutex
);
2562 enum latency_range
{
2566 latency_invalid
= 255
2570 * e1000_update_itr - update the dynamic ITR value based on statistics
2571 * @adapter: pointer to adapter
2572 * @itr_setting: current adapter->itr
2573 * @packets: the number of packets during this measurement interval
2574 * @bytes: the number of bytes during this measurement interval
2576 * Stores a new ITR value based on packets and byte
2577 * counts during the last interrupt. The advantage of per interrupt
2578 * computation is faster updates and more accurate ITR for the current
2579 * traffic pattern. Constants in this function were computed
2580 * based on theoretical maximum wire speed and thresholds were set based
2581 * on testing data as well as attempting to minimize response time
2582 * while increasing bulk throughput.
2583 * this functionality is controlled by the InterruptThrottleRate module
2584 * parameter (see e1000_param.c)
2586 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2587 u16 itr_setting
, int packets
, int bytes
)
2589 unsigned int retval
= itr_setting
;
2590 struct e1000_hw
*hw
= &adapter
->hw
;
2592 if (unlikely(hw
->mac_type
< e1000_82540
))
2593 goto update_itr_done
;
2596 goto update_itr_done
;
2598 switch (itr_setting
) {
2599 case lowest_latency
:
2600 /* jumbo frames get bulk treatment*/
2601 if (bytes
/packets
> 8000)
2602 retval
= bulk_latency
;
2603 else if ((packets
< 5) && (bytes
> 512))
2604 retval
= low_latency
;
2606 case low_latency
: /* 50 usec aka 20000 ints/s */
2607 if (bytes
> 10000) {
2608 /* jumbo frames need bulk latency setting */
2609 if (bytes
/packets
> 8000)
2610 retval
= bulk_latency
;
2611 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2612 retval
= bulk_latency
;
2613 else if ((packets
> 35))
2614 retval
= lowest_latency
;
2615 } else if (bytes
/packets
> 2000)
2616 retval
= bulk_latency
;
2617 else if (packets
<= 2 && bytes
< 512)
2618 retval
= lowest_latency
;
2620 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2621 if (bytes
> 25000) {
2623 retval
= low_latency
;
2624 } else if (bytes
< 6000) {
2625 retval
= low_latency
;
2634 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2636 struct e1000_hw
*hw
= &adapter
->hw
;
2638 u32 new_itr
= adapter
->itr
;
2640 if (unlikely(hw
->mac_type
< e1000_82540
))
2643 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2644 if (unlikely(adapter
->link_speed
!= SPEED_1000
)) {
2650 adapter
->tx_itr
= e1000_update_itr(adapter
,
2652 adapter
->total_tx_packets
,
2653 adapter
->total_tx_bytes
);
2654 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2655 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2656 adapter
->tx_itr
= low_latency
;
2658 adapter
->rx_itr
= e1000_update_itr(adapter
,
2660 adapter
->total_rx_packets
,
2661 adapter
->total_rx_bytes
);
2662 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2663 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2664 adapter
->rx_itr
= low_latency
;
2666 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2668 switch (current_itr
) {
2669 /* counts and packets in update_itr are dependent on these numbers */
2670 case lowest_latency
:
2674 new_itr
= 20000; /* aka hwitr = ~200 */
2684 if (new_itr
!= adapter
->itr
) {
2685 /* this attempts to bias the interrupt rate towards Bulk
2686 * by adding intermediate steps when interrupt rate is
2688 new_itr
= new_itr
> adapter
->itr
?
2689 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2691 adapter
->itr
= new_itr
;
2692 ew32(ITR
, 1000000000 / (new_itr
* 256));
2696 #define E1000_TX_FLAGS_CSUM 0x00000001
2697 #define E1000_TX_FLAGS_VLAN 0x00000002
2698 #define E1000_TX_FLAGS_TSO 0x00000004
2699 #define E1000_TX_FLAGS_IPV4 0x00000008
2700 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2701 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2703 static int e1000_tso(struct e1000_adapter
*adapter
,
2704 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2706 struct e1000_context_desc
*context_desc
;
2707 struct e1000_buffer
*buffer_info
;
2710 u16 ipcse
= 0, tucse
, mss
;
2711 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
2714 if (skb_is_gso(skb
)) {
2715 if (skb_header_cloned(skb
)) {
2716 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2721 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2722 mss
= skb_shinfo(skb
)->gso_size
;
2723 if (skb
->protocol
== htons(ETH_P_IP
)) {
2724 struct iphdr
*iph
= ip_hdr(skb
);
2727 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2731 cmd_length
= E1000_TXD_CMD_IP
;
2732 ipcse
= skb_transport_offset(skb
) - 1;
2733 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
2734 ipv6_hdr(skb
)->payload_len
= 0;
2735 tcp_hdr(skb
)->check
=
2736 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2737 &ipv6_hdr(skb
)->daddr
,
2741 ipcss
= skb_network_offset(skb
);
2742 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
2743 tucss
= skb_transport_offset(skb
);
2744 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
2747 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
2748 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
2750 i
= tx_ring
->next_to_use
;
2751 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2752 buffer_info
= &tx_ring
->buffer_info
[i
];
2754 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
2755 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
2756 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
2757 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
2758 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
2759 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
2760 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
2761 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
2762 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
2764 buffer_info
->time_stamp
= jiffies
;
2765 buffer_info
->next_to_watch
= i
;
2767 if (++i
== tx_ring
->count
) i
= 0;
2768 tx_ring
->next_to_use
= i
;
2775 static bool e1000_tx_csum(struct e1000_adapter
*adapter
,
2776 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2778 struct e1000_context_desc
*context_desc
;
2779 struct e1000_buffer
*buffer_info
;
2782 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
2784 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
2787 switch (skb
->protocol
) {
2788 case cpu_to_be16(ETH_P_IP
):
2789 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2790 cmd_len
|= E1000_TXD_CMD_TCP
;
2792 case cpu_to_be16(ETH_P_IPV6
):
2793 /* XXX not handling all IPV6 headers */
2794 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2795 cmd_len
|= E1000_TXD_CMD_TCP
;
2798 if (unlikely(net_ratelimit()))
2799 e_warn(drv
, "checksum_partial proto=%x!\n",
2804 css
= skb_checksum_start_offset(skb
);
2806 i
= tx_ring
->next_to_use
;
2807 buffer_info
= &tx_ring
->buffer_info
[i
];
2808 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2810 context_desc
->lower_setup
.ip_config
= 0;
2811 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
2812 context_desc
->upper_setup
.tcp_fields
.tucso
=
2813 css
+ skb
->csum_offset
;
2814 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
2815 context_desc
->tcp_seg_setup
.data
= 0;
2816 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
2818 buffer_info
->time_stamp
= jiffies
;
2819 buffer_info
->next_to_watch
= i
;
2821 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2822 tx_ring
->next_to_use
= i
;
2827 #define E1000_MAX_TXD_PWR 12
2828 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2830 static int e1000_tx_map(struct e1000_adapter
*adapter
,
2831 struct e1000_tx_ring
*tx_ring
,
2832 struct sk_buff
*skb
, unsigned int first
,
2833 unsigned int max_per_txd
, unsigned int nr_frags
,
2836 struct e1000_hw
*hw
= &adapter
->hw
;
2837 struct pci_dev
*pdev
= adapter
->pdev
;
2838 struct e1000_buffer
*buffer_info
;
2839 unsigned int len
= skb_headlen(skb
);
2840 unsigned int offset
= 0, size
, count
= 0, i
;
2841 unsigned int f
, bytecount
, segs
;
2843 i
= tx_ring
->next_to_use
;
2846 buffer_info
= &tx_ring
->buffer_info
[i
];
2847 size
= min(len
, max_per_txd
);
2848 /* Workaround for Controller erratum --
2849 * descriptor for non-tso packet in a linear SKB that follows a
2850 * tso gets written back prematurely before the data is fully
2851 * DMA'd to the controller */
2852 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&&
2854 tx_ring
->last_tx_tso
= false;
2858 /* Workaround for premature desc write-backs
2859 * in TSO mode. Append 4-byte sentinel desc */
2860 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
2862 /* work-around for errata 10 and it applies
2863 * to all controllers in PCI-X mode
2864 * The fix is to make sure that the first descriptor of a
2865 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2867 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
2868 (size
> 2015) && count
== 0))
2871 /* Workaround for potential 82544 hang in PCI-X. Avoid
2872 * terminating buffers within evenly-aligned dwords. */
2873 if (unlikely(adapter
->pcix_82544
&&
2874 !((unsigned long)(skb
->data
+ offset
+ size
- 1) & 4) &&
2878 buffer_info
->length
= size
;
2879 /* set time_stamp *before* dma to help avoid a possible race */
2880 buffer_info
->time_stamp
= jiffies
;
2881 buffer_info
->mapped_as_page
= false;
2882 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2884 size
, DMA_TO_DEVICE
);
2885 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2887 buffer_info
->next_to_watch
= i
;
2894 if (unlikely(i
== tx_ring
->count
))
2899 for (f
= 0; f
< nr_frags
; f
++) {
2900 const struct skb_frag_struct
*frag
;
2902 frag
= &skb_shinfo(skb
)->frags
[f
];
2903 len
= skb_frag_size(frag
);
2907 unsigned long bufend
;
2909 if (unlikely(i
== tx_ring
->count
))
2912 buffer_info
= &tx_ring
->buffer_info
[i
];
2913 size
= min(len
, max_per_txd
);
2914 /* Workaround for premature desc write-backs
2915 * in TSO mode. Append 4-byte sentinel desc */
2916 if (unlikely(mss
&& f
== (nr_frags
-1) && size
== len
&& size
> 8))
2918 /* Workaround for potential 82544 hang in PCI-X.
2919 * Avoid terminating buffers within evenly-aligned
2921 bufend
= (unsigned long)
2922 page_to_phys(skb_frag_page(frag
));
2923 bufend
+= offset
+ size
- 1;
2924 if (unlikely(adapter
->pcix_82544
&&
2929 buffer_info
->length
= size
;
2930 buffer_info
->time_stamp
= jiffies
;
2931 buffer_info
->mapped_as_page
= true;
2932 buffer_info
->dma
= skb_frag_dma_map(&pdev
->dev
, frag
,
2933 offset
, size
, DMA_TO_DEVICE
);
2934 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2936 buffer_info
->next_to_watch
= i
;
2944 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
2945 /* multiply data chunks by size of headers */
2946 bytecount
= ((segs
- 1) * skb_headlen(skb
)) + skb
->len
;
2948 tx_ring
->buffer_info
[i
].skb
= skb
;
2949 tx_ring
->buffer_info
[i
].segs
= segs
;
2950 tx_ring
->buffer_info
[i
].bytecount
= bytecount
;
2951 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2956 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2957 buffer_info
->dma
= 0;
2963 i
+= tx_ring
->count
;
2965 buffer_info
= &tx_ring
->buffer_info
[i
];
2966 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2972 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
2973 struct e1000_tx_ring
*tx_ring
, int tx_flags
,
2976 struct e1000_hw
*hw
= &adapter
->hw
;
2977 struct e1000_tx_desc
*tx_desc
= NULL
;
2978 struct e1000_buffer
*buffer_info
;
2979 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
2982 if (likely(tx_flags
& E1000_TX_FLAGS_TSO
)) {
2983 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
2985 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2987 if (likely(tx_flags
& E1000_TX_FLAGS_IPV4
))
2988 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
2991 if (likely(tx_flags
& E1000_TX_FLAGS_CSUM
)) {
2992 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
2993 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2996 if (unlikely(tx_flags
& E1000_TX_FLAGS_VLAN
)) {
2997 txd_lower
|= E1000_TXD_CMD_VLE
;
2998 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
3001 i
= tx_ring
->next_to_use
;
3004 buffer_info
= &tx_ring
->buffer_info
[i
];
3005 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3006 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
3007 tx_desc
->lower
.data
=
3008 cpu_to_le32(txd_lower
| buffer_info
->length
);
3009 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
3010 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3013 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
3015 /* Force memory writes to complete before letting h/w
3016 * know there are new descriptors to fetch. (Only
3017 * applicable for weak-ordered memory model archs,
3018 * such as IA-64). */
3021 tx_ring
->next_to_use
= i
;
3022 writel(i
, hw
->hw_addr
+ tx_ring
->tdt
);
3023 /* we need this if more than one processor can write to our tail
3024 * at a time, it syncronizes IO on IA64/Altix systems */
3029 * 82547 workaround to avoid controller hang in half-duplex environment.
3030 * The workaround is to avoid queuing a large packet that would span
3031 * the internal Tx FIFO ring boundary by notifying the stack to resend
3032 * the packet at a later time. This gives the Tx FIFO an opportunity to
3033 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3034 * to the beginning of the Tx FIFO.
3037 #define E1000_FIFO_HDR 0x10
3038 #define E1000_82547_PAD_LEN 0x3E0
3040 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
3041 struct sk_buff
*skb
)
3043 u32 fifo_space
= adapter
->tx_fifo_size
- adapter
->tx_fifo_head
;
3044 u32 skb_fifo_len
= skb
->len
+ E1000_FIFO_HDR
;
3046 skb_fifo_len
= ALIGN(skb_fifo_len
, E1000_FIFO_HDR
);
3048 if (adapter
->link_duplex
!= HALF_DUPLEX
)
3049 goto no_fifo_stall_required
;
3051 if (atomic_read(&adapter
->tx_fifo_stall
))
3054 if (skb_fifo_len
>= (E1000_82547_PAD_LEN
+ fifo_space
)) {
3055 atomic_set(&adapter
->tx_fifo_stall
, 1);
3059 no_fifo_stall_required
:
3060 adapter
->tx_fifo_head
+= skb_fifo_len
;
3061 if (adapter
->tx_fifo_head
>= adapter
->tx_fifo_size
)
3062 adapter
->tx_fifo_head
-= adapter
->tx_fifo_size
;
3066 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
3068 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3069 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3071 netif_stop_queue(netdev
);
3072 /* Herbert's original patch had:
3073 * smp_mb__after_netif_stop_queue();
3074 * but since that doesn't exist yet, just open code it. */
3077 /* We need to check again in a case another CPU has just
3078 * made room available. */
3079 if (likely(E1000_DESC_UNUSED(tx_ring
) < size
))
3083 netif_start_queue(netdev
);
3084 ++adapter
->restart_queue
;
3088 static int e1000_maybe_stop_tx(struct net_device
*netdev
,
3089 struct e1000_tx_ring
*tx_ring
, int size
)
3091 if (likely(E1000_DESC_UNUSED(tx_ring
) >= size
))
3093 return __e1000_maybe_stop_tx(netdev
, size
);
3096 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3097 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
3098 struct net_device
*netdev
)
3100 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3101 struct e1000_hw
*hw
= &adapter
->hw
;
3102 struct e1000_tx_ring
*tx_ring
;
3103 unsigned int first
, max_per_txd
= E1000_MAX_DATA_PER_TXD
;
3104 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
3105 unsigned int tx_flags
= 0;
3106 unsigned int len
= skb_headlen(skb
);
3107 unsigned int nr_frags
;
3113 /* This goes back to the question of how to logically map a tx queue
3114 * to a flow. Right now, performance is impacted slightly negatively
3115 * if using multiple tx queues. If the stack breaks away from a
3116 * single qdisc implementation, we can look at this again. */
3117 tx_ring
= adapter
->tx_ring
;
3119 if (unlikely(skb
->len
<= 0)) {
3120 dev_kfree_skb_any(skb
);
3121 return NETDEV_TX_OK
;
3124 mss
= skb_shinfo(skb
)->gso_size
;
3125 /* The controller does a simple calculation to
3126 * make sure there is enough room in the FIFO before
3127 * initiating the DMA for each buffer. The calc is:
3128 * 4 = ceil(buffer len/mss). To make sure we don't
3129 * overrun the FIFO, adjust the max buffer len if mss
3133 max_per_txd
= min(mss
<< 2, max_per_txd
);
3134 max_txd_pwr
= fls(max_per_txd
) - 1;
3136 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3137 if (skb
->data_len
&& hdr_len
== len
) {
3138 switch (hw
->mac_type
) {
3139 unsigned int pull_size
;
3141 /* Make sure we have room to chop off 4 bytes,
3142 * and that the end alignment will work out to
3143 * this hardware's requirements
3144 * NOTE: this is a TSO only workaround
3145 * if end byte alignment not correct move us
3146 * into the next dword */
3147 if ((unsigned long)(skb_tail_pointer(skb
) - 1) & 4)
3150 pull_size
= min((unsigned int)4, skb
->data_len
);
3151 if (!__pskb_pull_tail(skb
, pull_size
)) {
3152 e_err(drv
, "__pskb_pull_tail "
3154 dev_kfree_skb_any(skb
);
3155 return NETDEV_TX_OK
;
3157 len
= skb_headlen(skb
);
3166 /* reserve a descriptor for the offload context */
3167 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
3171 /* Controller Erratum workaround */
3172 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&& !skb_is_gso(skb
))
3175 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
3177 if (adapter
->pcix_82544
)
3180 /* work-around for errata 10 and it applies to all controllers
3181 * in PCI-X mode, so add one more descriptor to the count
3183 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
3187 nr_frags
= skb_shinfo(skb
)->nr_frags
;
3188 for (f
= 0; f
< nr_frags
; f
++)
3189 count
+= TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb
)->frags
[f
]),
3191 if (adapter
->pcix_82544
)
3194 /* need: count + 2 desc gap to keep tail from touching
3195 * head, otherwise try next time */
3196 if (unlikely(e1000_maybe_stop_tx(netdev
, tx_ring
, count
+ 2)))
3197 return NETDEV_TX_BUSY
;
3199 if (unlikely((hw
->mac_type
== e1000_82547
) &&
3200 (e1000_82547_fifo_workaround(adapter
, skb
)))) {
3201 netif_stop_queue(netdev
);
3202 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3203 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
3204 return NETDEV_TX_BUSY
;
3207 if (vlan_tx_tag_present(skb
)) {
3208 tx_flags
|= E1000_TX_FLAGS_VLAN
;
3209 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
3212 first
= tx_ring
->next_to_use
;
3214 tso
= e1000_tso(adapter
, tx_ring
, skb
);
3216 dev_kfree_skb_any(skb
);
3217 return NETDEV_TX_OK
;
3221 if (likely(hw
->mac_type
!= e1000_82544
))
3222 tx_ring
->last_tx_tso
= true;
3223 tx_flags
|= E1000_TX_FLAGS_TSO
;
3224 } else if (likely(e1000_tx_csum(adapter
, tx_ring
, skb
)))
3225 tx_flags
|= E1000_TX_FLAGS_CSUM
;
3227 if (likely(skb
->protocol
== htons(ETH_P_IP
)))
3228 tx_flags
|= E1000_TX_FLAGS_IPV4
;
3230 count
= e1000_tx_map(adapter
, tx_ring
, skb
, first
, max_per_txd
,
3234 e1000_tx_queue(adapter
, tx_ring
, tx_flags
, count
);
3235 /* Make sure there is space in the ring for the next send. */
3236 e1000_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 2);
3239 dev_kfree_skb_any(skb
);
3240 tx_ring
->buffer_info
[first
].time_stamp
= 0;
3241 tx_ring
->next_to_use
= first
;
3244 return NETDEV_TX_OK
;
3248 * e1000_tx_timeout - Respond to a Tx Hang
3249 * @netdev: network interface device structure
3252 static void e1000_tx_timeout(struct net_device
*netdev
)
3254 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3256 /* Do the reset outside of interrupt context */
3257 adapter
->tx_timeout_count
++;
3258 schedule_work(&adapter
->reset_task
);
3261 static void e1000_reset_task(struct work_struct
*work
)
3263 struct e1000_adapter
*adapter
=
3264 container_of(work
, struct e1000_adapter
, reset_task
);
3266 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
3268 e1000_reinit_safe(adapter
);
3272 * e1000_get_stats - Get System Network Statistics
3273 * @netdev: network interface device structure
3275 * Returns the address of the device statistics structure.
3276 * The statistics are actually updated from the watchdog.
3279 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
3281 /* only return the current stats */
3282 return &netdev
->stats
;
3286 * e1000_change_mtu - Change the Maximum Transfer Unit
3287 * @netdev: network interface device structure
3288 * @new_mtu: new value for maximum frame size
3290 * Returns 0 on success, negative on failure
3293 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
3295 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3296 struct e1000_hw
*hw
= &adapter
->hw
;
3297 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
3299 if ((max_frame
< MINIMUM_ETHERNET_FRAME_SIZE
) ||
3300 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3301 e_err(probe
, "Invalid MTU setting\n");
3305 /* Adapter-specific max frame size limits. */
3306 switch (hw
->mac_type
) {
3307 case e1000_undefined
... e1000_82542_rev2_1
:
3308 if (max_frame
> (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) {
3309 e_err(probe
, "Jumbo Frames not supported.\n");
3314 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3318 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
3320 /* e1000_down has a dependency on max_frame_size */
3321 hw
->max_frame_size
= max_frame
;
3322 if (netif_running(netdev
))
3323 e1000_down(adapter
);
3325 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3326 * means we reserve 2 more, this pushes us to allocate from the next
3328 * i.e. RXBUFFER_2048 --> size-4096 slab
3329 * however with the new *_jumbo_rx* routines, jumbo receives will use
3330 * fragmented skbs */
3332 if (max_frame
<= E1000_RXBUFFER_2048
)
3333 adapter
->rx_buffer_len
= E1000_RXBUFFER_2048
;
3335 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3336 adapter
->rx_buffer_len
= E1000_RXBUFFER_16384
;
3337 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3338 adapter
->rx_buffer_len
= PAGE_SIZE
;
3341 /* adjust allocation if LPE protects us, and we aren't using SBP */
3342 if (!hw
->tbi_compatibility_on
&&
3343 ((max_frame
== (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) ||
3344 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
)))
3345 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3347 pr_info("%s changing MTU from %d to %d\n",
3348 netdev
->name
, netdev
->mtu
, new_mtu
);
3349 netdev
->mtu
= new_mtu
;
3351 if (netif_running(netdev
))
3354 e1000_reset(adapter
);
3356 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
3362 * e1000_update_stats - Update the board statistics counters
3363 * @adapter: board private structure
3366 void e1000_update_stats(struct e1000_adapter
*adapter
)
3368 struct net_device
*netdev
= adapter
->netdev
;
3369 struct e1000_hw
*hw
= &adapter
->hw
;
3370 struct pci_dev
*pdev
= adapter
->pdev
;
3371 unsigned long flags
;
3374 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3377 * Prevent stats update while adapter is being reset, or if the pci
3378 * connection is down.
3380 if (adapter
->link_speed
== 0)
3382 if (pci_channel_offline(pdev
))
3385 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3387 /* these counters are modified from e1000_tbi_adjust_stats,
3388 * called from the interrupt context, so they must only
3389 * be written while holding adapter->stats_lock
3392 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3393 adapter
->stats
.gprc
+= er32(GPRC
);
3394 adapter
->stats
.gorcl
+= er32(GORCL
);
3395 adapter
->stats
.gorch
+= er32(GORCH
);
3396 adapter
->stats
.bprc
+= er32(BPRC
);
3397 adapter
->stats
.mprc
+= er32(MPRC
);
3398 adapter
->stats
.roc
+= er32(ROC
);
3400 adapter
->stats
.prc64
+= er32(PRC64
);
3401 adapter
->stats
.prc127
+= er32(PRC127
);
3402 adapter
->stats
.prc255
+= er32(PRC255
);
3403 adapter
->stats
.prc511
+= er32(PRC511
);
3404 adapter
->stats
.prc1023
+= er32(PRC1023
);
3405 adapter
->stats
.prc1522
+= er32(PRC1522
);
3407 adapter
->stats
.symerrs
+= er32(SYMERRS
);
3408 adapter
->stats
.mpc
+= er32(MPC
);
3409 adapter
->stats
.scc
+= er32(SCC
);
3410 adapter
->stats
.ecol
+= er32(ECOL
);
3411 adapter
->stats
.mcc
+= er32(MCC
);
3412 adapter
->stats
.latecol
+= er32(LATECOL
);
3413 adapter
->stats
.dc
+= er32(DC
);
3414 adapter
->stats
.sec
+= er32(SEC
);
3415 adapter
->stats
.rlec
+= er32(RLEC
);
3416 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3417 adapter
->stats
.xontxc
+= er32(XONTXC
);
3418 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3419 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3420 adapter
->stats
.fcruc
+= er32(FCRUC
);
3421 adapter
->stats
.gptc
+= er32(GPTC
);
3422 adapter
->stats
.gotcl
+= er32(GOTCL
);
3423 adapter
->stats
.gotch
+= er32(GOTCH
);
3424 adapter
->stats
.rnbc
+= er32(RNBC
);
3425 adapter
->stats
.ruc
+= er32(RUC
);
3426 adapter
->stats
.rfc
+= er32(RFC
);
3427 adapter
->stats
.rjc
+= er32(RJC
);
3428 adapter
->stats
.torl
+= er32(TORL
);
3429 adapter
->stats
.torh
+= er32(TORH
);
3430 adapter
->stats
.totl
+= er32(TOTL
);
3431 adapter
->stats
.toth
+= er32(TOTH
);
3432 adapter
->stats
.tpr
+= er32(TPR
);
3434 adapter
->stats
.ptc64
+= er32(PTC64
);
3435 adapter
->stats
.ptc127
+= er32(PTC127
);
3436 adapter
->stats
.ptc255
+= er32(PTC255
);
3437 adapter
->stats
.ptc511
+= er32(PTC511
);
3438 adapter
->stats
.ptc1023
+= er32(PTC1023
);
3439 adapter
->stats
.ptc1522
+= er32(PTC1522
);
3441 adapter
->stats
.mptc
+= er32(MPTC
);
3442 adapter
->stats
.bptc
+= er32(BPTC
);
3444 /* used for adaptive IFS */
3446 hw
->tx_packet_delta
= er32(TPT
);
3447 adapter
->stats
.tpt
+= hw
->tx_packet_delta
;
3448 hw
->collision_delta
= er32(COLC
);
3449 adapter
->stats
.colc
+= hw
->collision_delta
;
3451 if (hw
->mac_type
>= e1000_82543
) {
3452 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3453 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3454 adapter
->stats
.tncrs
+= er32(TNCRS
);
3455 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3456 adapter
->stats
.tsctc
+= er32(TSCTC
);
3457 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3460 /* Fill out the OS statistics structure */
3461 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3462 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3466 /* RLEC on some newer hardware can be incorrect so build
3467 * our own version based on RUC and ROC */
3468 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3469 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3470 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3471 adapter
->stats
.cexterr
;
3472 adapter
->stats
.rlerrc
= adapter
->stats
.ruc
+ adapter
->stats
.roc
;
3473 netdev
->stats
.rx_length_errors
= adapter
->stats
.rlerrc
;
3474 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3475 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3476 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3479 adapter
->stats
.txerrc
= adapter
->stats
.ecol
+ adapter
->stats
.latecol
;
3480 netdev
->stats
.tx_errors
= adapter
->stats
.txerrc
;
3481 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3482 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3483 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3484 if (hw
->bad_tx_carr_stats_fd
&&
3485 adapter
->link_duplex
== FULL_DUPLEX
) {
3486 netdev
->stats
.tx_carrier_errors
= 0;
3487 adapter
->stats
.tncrs
= 0;
3490 /* Tx Dropped needs to be maintained elsewhere */
3493 if (hw
->media_type
== e1000_media_type_copper
) {
3494 if ((adapter
->link_speed
== SPEED_1000
) &&
3495 (!e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_tmp
))) {
3496 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3497 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3500 if ((hw
->mac_type
<= e1000_82546
) &&
3501 (hw
->phy_type
== e1000_phy_m88
) &&
3502 !e1000_read_phy_reg(hw
, M88E1000_RX_ERR_CNTR
, &phy_tmp
))
3503 adapter
->phy_stats
.receive_errors
+= phy_tmp
;
3506 /* Management Stats */
3507 if (hw
->has_smbus
) {
3508 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3509 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3510 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3513 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
3517 * e1000_intr - Interrupt Handler
3518 * @irq: interrupt number
3519 * @data: pointer to a network interface device structure
3522 static irqreturn_t
e1000_intr(int irq
, void *data
)
3524 struct net_device
*netdev
= data
;
3525 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3526 struct e1000_hw
*hw
= &adapter
->hw
;
3527 u32 icr
= er32(ICR
);
3529 if (unlikely((!icr
)))
3530 return IRQ_NONE
; /* Not our interrupt */
3533 * we might have caused the interrupt, but the above
3534 * read cleared it, and just in case the driver is
3535 * down there is nothing to do so return handled
3537 if (unlikely(test_bit(__E1000_DOWN
, &adapter
->flags
)))
3540 if (unlikely(icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
))) {
3541 hw
->get_link_status
= 1;
3542 /* guard against interrupt when we're going down */
3543 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3544 schedule_delayed_work(&adapter
->watchdog_task
, 1);
3547 /* disable interrupts, without the synchronize_irq bit */
3549 E1000_WRITE_FLUSH();
3551 if (likely(napi_schedule_prep(&adapter
->napi
))) {
3552 adapter
->total_tx_bytes
= 0;
3553 adapter
->total_tx_packets
= 0;
3554 adapter
->total_rx_bytes
= 0;
3555 adapter
->total_rx_packets
= 0;
3556 __napi_schedule(&adapter
->napi
);
3558 /* this really should not happen! if it does it is basically a
3559 * bug, but not a hard error, so enable ints and continue */
3560 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3561 e1000_irq_enable(adapter
);
3568 * e1000_clean - NAPI Rx polling callback
3569 * @adapter: board private structure
3571 static int e1000_clean(struct napi_struct
*napi
, int budget
)
3573 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
3574 int tx_clean_complete
= 0, work_done
= 0;
3576 tx_clean_complete
= e1000_clean_tx_irq(adapter
, &adapter
->tx_ring
[0]);
3578 adapter
->clean_rx(adapter
, &adapter
->rx_ring
[0], &work_done
, budget
);
3580 if (!tx_clean_complete
)
3583 /* If budget not fully consumed, exit the polling mode */
3584 if (work_done
< budget
) {
3585 if (likely(adapter
->itr_setting
& 3))
3586 e1000_set_itr(adapter
);
3587 napi_complete(napi
);
3588 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3589 e1000_irq_enable(adapter
);
3596 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3597 * @adapter: board private structure
3599 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
3600 struct e1000_tx_ring
*tx_ring
)
3602 struct e1000_hw
*hw
= &adapter
->hw
;
3603 struct net_device
*netdev
= adapter
->netdev
;
3604 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
3605 struct e1000_buffer
*buffer_info
;
3606 unsigned int i
, eop
;
3607 unsigned int count
= 0;
3608 unsigned int total_tx_bytes
=0, total_tx_packets
=0;
3610 i
= tx_ring
->next_to_clean
;
3611 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3612 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3614 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3615 (count
< tx_ring
->count
)) {
3616 bool cleaned
= false;
3617 rmb(); /* read buffer_info after eop_desc */
3618 for ( ; !cleaned
; count
++) {
3619 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3620 buffer_info
= &tx_ring
->buffer_info
[i
];
3621 cleaned
= (i
== eop
);
3624 total_tx_packets
+= buffer_info
->segs
;
3625 total_tx_bytes
+= buffer_info
->bytecount
;
3627 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
3628 tx_desc
->upper
.data
= 0;
3630 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3633 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3634 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3637 tx_ring
->next_to_clean
= i
;
3639 #define TX_WAKE_THRESHOLD 32
3640 if (unlikely(count
&& netif_carrier_ok(netdev
) &&
3641 E1000_DESC_UNUSED(tx_ring
) >= TX_WAKE_THRESHOLD
)) {
3642 /* Make sure that anybody stopping the queue after this
3643 * sees the new next_to_clean.
3647 if (netif_queue_stopped(netdev
) &&
3648 !(test_bit(__E1000_DOWN
, &adapter
->flags
))) {
3649 netif_wake_queue(netdev
);
3650 ++adapter
->restart_queue
;
3654 if (adapter
->detect_tx_hung
) {
3655 /* Detect a transmit hang in hardware, this serializes the
3656 * check with the clearing of time_stamp and movement of i */
3657 adapter
->detect_tx_hung
= false;
3658 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
3659 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+
3660 (adapter
->tx_timeout_factor
* HZ
)) &&
3661 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
3663 /* detected Tx unit hang */
3664 e_err(drv
, "Detected Tx Unit Hang\n"
3668 " next_to_use <%x>\n"
3669 " next_to_clean <%x>\n"
3670 "buffer_info[next_to_clean]\n"
3671 " time_stamp <%lx>\n"
3672 " next_to_watch <%x>\n"
3674 " next_to_watch.status <%x>\n",
3675 (unsigned long)((tx_ring
- adapter
->tx_ring
) /
3676 sizeof(struct e1000_tx_ring
)),
3677 readl(hw
->hw_addr
+ tx_ring
->tdh
),
3678 readl(hw
->hw_addr
+ tx_ring
->tdt
),
3679 tx_ring
->next_to_use
,
3680 tx_ring
->next_to_clean
,
3681 tx_ring
->buffer_info
[eop
].time_stamp
,
3684 eop_desc
->upper
.fields
.status
);
3685 netif_stop_queue(netdev
);
3688 adapter
->total_tx_bytes
+= total_tx_bytes
;
3689 adapter
->total_tx_packets
+= total_tx_packets
;
3690 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
3691 netdev
->stats
.tx_packets
+= total_tx_packets
;
3692 return count
< tx_ring
->count
;
3696 * e1000_rx_checksum - Receive Checksum Offload for 82543
3697 * @adapter: board private structure
3698 * @status_err: receive descriptor status and error fields
3699 * @csum: receive descriptor csum field
3700 * @sk_buff: socket buffer with received data
3703 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
3704 u32 csum
, struct sk_buff
*skb
)
3706 struct e1000_hw
*hw
= &adapter
->hw
;
3707 u16 status
= (u16
)status_err
;
3708 u8 errors
= (u8
)(status_err
>> 24);
3710 skb_checksum_none_assert(skb
);
3712 /* 82543 or newer only */
3713 if (unlikely(hw
->mac_type
< e1000_82543
)) return;
3714 /* Ignore Checksum bit is set */
3715 if (unlikely(status
& E1000_RXD_STAT_IXSM
)) return;
3716 /* TCP/UDP checksum error bit is set */
3717 if (unlikely(errors
& E1000_RXD_ERR_TCPE
)) {
3718 /* let the stack verify checksum errors */
3719 adapter
->hw_csum_err
++;
3722 /* TCP/UDP Checksum has not been calculated */
3723 if (!(status
& E1000_RXD_STAT_TCPCS
))
3726 /* It must be a TCP or UDP packet with a valid checksum */
3727 if (likely(status
& E1000_RXD_STAT_TCPCS
)) {
3728 /* TCP checksum is good */
3729 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3731 adapter
->hw_csum_good
++;
3735 * e1000_consume_page - helper function
3737 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
3742 skb
->data_len
+= length
;
3743 skb
->truesize
+= PAGE_SIZE
;
3747 * e1000_receive_skb - helper function to handle rx indications
3748 * @adapter: board private structure
3749 * @status: descriptor status field as written by hardware
3750 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3751 * @skb: pointer to sk_buff to be indicated to stack
3753 static void e1000_receive_skb(struct e1000_adapter
*adapter
, u8 status
,
3754 __le16 vlan
, struct sk_buff
*skb
)
3756 skb
->protocol
= eth_type_trans(skb
, adapter
->netdev
);
3758 if (status
& E1000_RXD_STAT_VP
) {
3759 u16 vid
= le16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
;
3761 __vlan_hwaccel_put_tag(skb
, vid
);
3763 napi_gro_receive(&adapter
->napi
, skb
);
3767 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3768 * @adapter: board private structure
3769 * @rx_ring: ring to clean
3770 * @work_done: amount of napi work completed this call
3771 * @work_to_do: max amount of work allowed for this call to do
3773 * the return value indicates whether actual cleaning was done, there
3774 * is no guarantee that everything was cleaned
3776 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
3777 struct e1000_rx_ring
*rx_ring
,
3778 int *work_done
, int work_to_do
)
3780 struct e1000_hw
*hw
= &adapter
->hw
;
3781 struct net_device
*netdev
= adapter
->netdev
;
3782 struct pci_dev
*pdev
= adapter
->pdev
;
3783 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
3784 struct e1000_buffer
*buffer_info
, *next_buffer
;
3785 unsigned long irq_flags
;
3788 int cleaned_count
= 0;
3789 bool cleaned
= false;
3790 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
3792 i
= rx_ring
->next_to_clean
;
3793 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3794 buffer_info
= &rx_ring
->buffer_info
[i
];
3796 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
3797 struct sk_buff
*skb
;
3800 if (*work_done
>= work_to_do
)
3803 rmb(); /* read descriptor and rx_buffer_info after status DD */
3805 status
= rx_desc
->status
;
3806 skb
= buffer_info
->skb
;
3807 buffer_info
->skb
= NULL
;
3809 if (++i
== rx_ring
->count
) i
= 0;
3810 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
3813 next_buffer
= &rx_ring
->buffer_info
[i
];
3817 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
3818 buffer_info
->length
, DMA_FROM_DEVICE
);
3819 buffer_info
->dma
= 0;
3821 length
= le16_to_cpu(rx_desc
->length
);
3823 /* errors is only valid for DD + EOP descriptors */
3824 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
3825 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
3826 u8 last_byte
= *(skb
->data
+ length
- 1);
3827 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
3829 spin_lock_irqsave(&adapter
->stats_lock
,
3831 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
3833 spin_unlock_irqrestore(&adapter
->stats_lock
,
3837 /* recycle both page and skb */
3838 buffer_info
->skb
= skb
;
3839 /* an error means any chain goes out the window
3841 if (rx_ring
->rx_skb_top
)
3842 dev_kfree_skb(rx_ring
->rx_skb_top
);
3843 rx_ring
->rx_skb_top
= NULL
;
3848 #define rxtop rx_ring->rx_skb_top
3849 if (!(status
& E1000_RXD_STAT_EOP
)) {
3850 /* this descriptor is only the beginning (or middle) */
3852 /* this is the beginning of a chain */
3854 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
3857 /* this is the middle of a chain */
3858 skb_fill_page_desc(rxtop
,
3859 skb_shinfo(rxtop
)->nr_frags
,
3860 buffer_info
->page
, 0, length
);
3861 /* re-use the skb, only consumed the page */
3862 buffer_info
->skb
= skb
;
3864 e1000_consume_page(buffer_info
, rxtop
, length
);
3868 /* end of the chain */
3869 skb_fill_page_desc(rxtop
,
3870 skb_shinfo(rxtop
)->nr_frags
,
3871 buffer_info
->page
, 0, length
);
3872 /* re-use the current skb, we only consumed the
3874 buffer_info
->skb
= skb
;
3877 e1000_consume_page(buffer_info
, skb
, length
);
3879 /* no chain, got EOP, this buf is the packet
3880 * copybreak to save the put_page/alloc_page */
3881 if (length
<= copybreak
&&
3882 skb_tailroom(skb
) >= length
) {
3884 vaddr
= kmap_atomic(buffer_info
->page
,
3885 KM_SKB_DATA_SOFTIRQ
);
3886 memcpy(skb_tail_pointer(skb
), vaddr
, length
);
3887 kunmap_atomic(vaddr
,
3888 KM_SKB_DATA_SOFTIRQ
);
3889 /* re-use the page, so don't erase
3890 * buffer_info->page */
3891 skb_put(skb
, length
);
3893 skb_fill_page_desc(skb
, 0,
3894 buffer_info
->page
, 0,
3896 e1000_consume_page(buffer_info
, skb
,
3902 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3903 e1000_rx_checksum(adapter
,
3905 ((u32
)(rx_desc
->errors
) << 24),
3906 le16_to_cpu(rx_desc
->csum
), skb
);
3908 pskb_trim(skb
, skb
->len
- 4);
3910 /* probably a little skewed due to removing CRC */
3911 total_rx_bytes
+= skb
->len
;
3914 /* eth type trans needs skb->data to point to something */
3915 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
3916 e_err(drv
, "pskb_may_pull failed.\n");
3921 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
3924 rx_desc
->status
= 0;
3926 /* return some buffers to hardware, one at a time is too slow */
3927 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
3928 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3932 /* use prefetched values */
3934 buffer_info
= next_buffer
;
3936 rx_ring
->next_to_clean
= i
;
3938 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
3940 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3942 adapter
->total_rx_packets
+= total_rx_packets
;
3943 adapter
->total_rx_bytes
+= total_rx_bytes
;
3944 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
3945 netdev
->stats
.rx_packets
+= total_rx_packets
;
3950 * this should improve performance for small packets with large amounts
3951 * of reassembly being done in the stack
3953 static void e1000_check_copybreak(struct net_device
*netdev
,
3954 struct e1000_buffer
*buffer_info
,
3955 u32 length
, struct sk_buff
**skb
)
3957 struct sk_buff
*new_skb
;
3959 if (length
> copybreak
)
3962 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
3966 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
3967 (*skb
)->data
- NET_IP_ALIGN
,
3968 length
+ NET_IP_ALIGN
);
3969 /* save the skb in buffer_info as good */
3970 buffer_info
->skb
= *skb
;
3975 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3976 * @adapter: board private structure
3977 * @rx_ring: ring to clean
3978 * @work_done: amount of napi work completed this call
3979 * @work_to_do: max amount of work allowed for this call to do
3981 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
3982 struct e1000_rx_ring
*rx_ring
,
3983 int *work_done
, int work_to_do
)
3985 struct e1000_hw
*hw
= &adapter
->hw
;
3986 struct net_device
*netdev
= adapter
->netdev
;
3987 struct pci_dev
*pdev
= adapter
->pdev
;
3988 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
3989 struct e1000_buffer
*buffer_info
, *next_buffer
;
3990 unsigned long flags
;
3993 int cleaned_count
= 0;
3994 bool cleaned
= false;
3995 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
3997 i
= rx_ring
->next_to_clean
;
3998 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3999 buffer_info
= &rx_ring
->buffer_info
[i
];
4001 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4002 struct sk_buff
*skb
;
4005 if (*work_done
>= work_to_do
)
4008 rmb(); /* read descriptor and rx_buffer_info after status DD */
4010 status
= rx_desc
->status
;
4011 skb
= buffer_info
->skb
;
4012 buffer_info
->skb
= NULL
;
4014 prefetch(skb
->data
- NET_IP_ALIGN
);
4016 if (++i
== rx_ring
->count
) i
= 0;
4017 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4020 next_buffer
= &rx_ring
->buffer_info
[i
];
4024 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4025 buffer_info
->length
, DMA_FROM_DEVICE
);
4026 buffer_info
->dma
= 0;
4028 length
= le16_to_cpu(rx_desc
->length
);
4029 /* !EOP means multiple descriptors were used to store a single
4030 * packet, if thats the case we need to toss it. In fact, we
4031 * to toss every packet with the EOP bit clear and the next
4032 * frame that _does_ have the EOP bit set, as it is by
4033 * definition only a frame fragment
4035 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
4036 adapter
->discarding
= true;
4038 if (adapter
->discarding
) {
4039 /* All receives must fit into a single buffer */
4040 e_dbg("Receive packet consumed multiple buffers\n");
4042 buffer_info
->skb
= skb
;
4043 if (status
& E1000_RXD_STAT_EOP
)
4044 adapter
->discarding
= false;
4048 if (unlikely(rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
)) {
4049 u8 last_byte
= *(skb
->data
+ length
- 1);
4050 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4052 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4053 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4055 spin_unlock_irqrestore(&adapter
->stats_lock
,
4060 buffer_info
->skb
= skb
;
4065 /* adjust length to remove Ethernet CRC, this must be
4066 * done after the TBI_ACCEPT workaround above */
4069 /* probably a little skewed due to removing CRC */
4070 total_rx_bytes
+= length
;
4073 e1000_check_copybreak(netdev
, buffer_info
, length
, &skb
);
4075 skb_put(skb
, length
);
4077 /* Receive Checksum Offload */
4078 e1000_rx_checksum(adapter
,
4080 ((u32
)(rx_desc
->errors
) << 24),
4081 le16_to_cpu(rx_desc
->csum
), skb
);
4083 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4086 rx_desc
->status
= 0;
4088 /* return some buffers to hardware, one at a time is too slow */
4089 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4090 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4094 /* use prefetched values */
4096 buffer_info
= next_buffer
;
4098 rx_ring
->next_to_clean
= i
;
4100 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4102 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4104 adapter
->total_rx_packets
+= total_rx_packets
;
4105 adapter
->total_rx_bytes
+= total_rx_bytes
;
4106 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4107 netdev
->stats
.rx_packets
+= total_rx_packets
;
4112 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4113 * @adapter: address of board private structure
4114 * @rx_ring: pointer to receive ring structure
4115 * @cleaned_count: number of buffers to allocate this pass
4119 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
4120 struct e1000_rx_ring
*rx_ring
, int cleaned_count
)
4122 struct net_device
*netdev
= adapter
->netdev
;
4123 struct pci_dev
*pdev
= adapter
->pdev
;
4124 struct e1000_rx_desc
*rx_desc
;
4125 struct e1000_buffer
*buffer_info
;
4126 struct sk_buff
*skb
;
4128 unsigned int bufsz
= 256 - 16 /*for skb_reserve */ ;
4130 i
= rx_ring
->next_to_use
;
4131 buffer_info
= &rx_ring
->buffer_info
[i
];
4133 while (cleaned_count
--) {
4134 skb
= buffer_info
->skb
;
4140 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4141 if (unlikely(!skb
)) {
4142 /* Better luck next round */
4143 adapter
->alloc_rx_buff_failed
++;
4147 /* Fix for errata 23, can't cross 64kB boundary */
4148 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4149 struct sk_buff
*oldskb
= skb
;
4150 e_err(rx_err
, "skb align check failed: %u bytes at "
4151 "%p\n", bufsz
, skb
->data
);
4152 /* Try again, without freeing the previous */
4153 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4154 /* Failed allocation, critical failure */
4156 dev_kfree_skb(oldskb
);
4157 adapter
->alloc_rx_buff_failed
++;
4161 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4164 dev_kfree_skb(oldskb
);
4165 break; /* while (cleaned_count--) */
4168 /* Use new allocation */
4169 dev_kfree_skb(oldskb
);
4171 buffer_info
->skb
= skb
;
4172 buffer_info
->length
= adapter
->rx_buffer_len
;
4174 /* allocate a new page if necessary */
4175 if (!buffer_info
->page
) {
4176 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4177 if (unlikely(!buffer_info
->page
)) {
4178 adapter
->alloc_rx_buff_failed
++;
4183 if (!buffer_info
->dma
) {
4184 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
4185 buffer_info
->page
, 0,
4186 buffer_info
->length
,
4188 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4189 put_page(buffer_info
->page
);
4191 buffer_info
->page
= NULL
;
4192 buffer_info
->skb
= NULL
;
4193 buffer_info
->dma
= 0;
4194 adapter
->alloc_rx_buff_failed
++;
4195 break; /* while !buffer_info->skb */
4199 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4200 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4202 if (unlikely(++i
== rx_ring
->count
))
4204 buffer_info
= &rx_ring
->buffer_info
[i
];
4207 if (likely(rx_ring
->next_to_use
!= i
)) {
4208 rx_ring
->next_to_use
= i
;
4209 if (unlikely(i
-- == 0))
4210 i
= (rx_ring
->count
- 1);
4212 /* Force memory writes to complete before letting h/w
4213 * know there are new descriptors to fetch. (Only
4214 * applicable for weak-ordered memory model archs,
4215 * such as IA-64). */
4217 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->rdt
);
4222 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4223 * @adapter: address of board private structure
4226 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
4227 struct e1000_rx_ring
*rx_ring
,
4230 struct e1000_hw
*hw
= &adapter
->hw
;
4231 struct net_device
*netdev
= adapter
->netdev
;
4232 struct pci_dev
*pdev
= adapter
->pdev
;
4233 struct e1000_rx_desc
*rx_desc
;
4234 struct e1000_buffer
*buffer_info
;
4235 struct sk_buff
*skb
;
4237 unsigned int bufsz
= adapter
->rx_buffer_len
;
4239 i
= rx_ring
->next_to_use
;
4240 buffer_info
= &rx_ring
->buffer_info
[i
];
4242 while (cleaned_count
--) {
4243 skb
= buffer_info
->skb
;
4249 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4250 if (unlikely(!skb
)) {
4251 /* Better luck next round */
4252 adapter
->alloc_rx_buff_failed
++;
4256 /* Fix for errata 23, can't cross 64kB boundary */
4257 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4258 struct sk_buff
*oldskb
= skb
;
4259 e_err(rx_err
, "skb align check failed: %u bytes at "
4260 "%p\n", bufsz
, skb
->data
);
4261 /* Try again, without freeing the previous */
4262 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4263 /* Failed allocation, critical failure */
4265 dev_kfree_skb(oldskb
);
4266 adapter
->alloc_rx_buff_failed
++;
4270 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4273 dev_kfree_skb(oldskb
);
4274 adapter
->alloc_rx_buff_failed
++;
4275 break; /* while !buffer_info->skb */
4278 /* Use new allocation */
4279 dev_kfree_skb(oldskb
);
4281 buffer_info
->skb
= skb
;
4282 buffer_info
->length
= adapter
->rx_buffer_len
;
4284 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4286 buffer_info
->length
,
4288 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4290 buffer_info
->skb
= NULL
;
4291 buffer_info
->dma
= 0;
4292 adapter
->alloc_rx_buff_failed
++;
4293 break; /* while !buffer_info->skb */
4297 * XXX if it was allocated cleanly it will never map to a
4301 /* Fix for errata 23, can't cross 64kB boundary */
4302 if (!e1000_check_64k_bound(adapter
,
4303 (void *)(unsigned long)buffer_info
->dma
,
4304 adapter
->rx_buffer_len
)) {
4305 e_err(rx_err
, "dma align check failed: %u bytes at "
4306 "%p\n", adapter
->rx_buffer_len
,
4307 (void *)(unsigned long)buffer_info
->dma
);
4309 buffer_info
->skb
= NULL
;
4311 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4312 adapter
->rx_buffer_len
,
4314 buffer_info
->dma
= 0;
4316 adapter
->alloc_rx_buff_failed
++;
4317 break; /* while !buffer_info->skb */
4319 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4320 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4322 if (unlikely(++i
== rx_ring
->count
))
4324 buffer_info
= &rx_ring
->buffer_info
[i
];
4327 if (likely(rx_ring
->next_to_use
!= i
)) {
4328 rx_ring
->next_to_use
= i
;
4329 if (unlikely(i
-- == 0))
4330 i
= (rx_ring
->count
- 1);
4332 /* Force memory writes to complete before letting h/w
4333 * know there are new descriptors to fetch. (Only
4334 * applicable for weak-ordered memory model archs,
4335 * such as IA-64). */
4337 writel(i
, hw
->hw_addr
+ rx_ring
->rdt
);
4342 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4346 static void e1000_smartspeed(struct e1000_adapter
*adapter
)
4348 struct e1000_hw
*hw
= &adapter
->hw
;
4352 if ((hw
->phy_type
!= e1000_phy_igp
) || !hw
->autoneg
||
4353 !(hw
->autoneg_advertised
& ADVERTISE_1000_FULL
))
4356 if (adapter
->smartspeed
== 0) {
4357 /* If Master/Slave config fault is asserted twice,
4358 * we assume back-to-back */
4359 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4360 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4361 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4362 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4363 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4364 if (phy_ctrl
& CR_1000T_MS_ENABLE
) {
4365 phy_ctrl
&= ~CR_1000T_MS_ENABLE
;
4366 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
,
4368 adapter
->smartspeed
++;
4369 if (!e1000_phy_setup_autoneg(hw
) &&
4370 !e1000_read_phy_reg(hw
, PHY_CTRL
,
4372 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4373 MII_CR_RESTART_AUTO_NEG
);
4374 e1000_write_phy_reg(hw
, PHY_CTRL
,
4379 } else if (adapter
->smartspeed
== E1000_SMARTSPEED_DOWNSHIFT
) {
4380 /* If still no link, perhaps using 2/3 pair cable */
4381 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4382 phy_ctrl
|= CR_1000T_MS_ENABLE
;
4383 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
, phy_ctrl
);
4384 if (!e1000_phy_setup_autoneg(hw
) &&
4385 !e1000_read_phy_reg(hw
, PHY_CTRL
, &phy_ctrl
)) {
4386 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4387 MII_CR_RESTART_AUTO_NEG
);
4388 e1000_write_phy_reg(hw
, PHY_CTRL
, phy_ctrl
);
4391 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4392 if (adapter
->smartspeed
++ == E1000_SMARTSPEED_MAX
)
4393 adapter
->smartspeed
= 0;
4403 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4409 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4422 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4425 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4426 struct e1000_hw
*hw
= &adapter
->hw
;
4427 struct mii_ioctl_data
*data
= if_mii(ifr
);
4430 unsigned long flags
;
4432 if (hw
->media_type
!= e1000_media_type_copper
)
4437 data
->phy_id
= hw
->phy_addr
;
4440 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4441 if (e1000_read_phy_reg(hw
, data
->reg_num
& 0x1F,
4443 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4446 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4449 if (data
->reg_num
& ~(0x1F))
4451 mii_reg
= data
->val_in
;
4452 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4453 if (e1000_write_phy_reg(hw
, data
->reg_num
,
4455 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4458 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4459 if (hw
->media_type
== e1000_media_type_copper
) {
4460 switch (data
->reg_num
) {
4462 if (mii_reg
& MII_CR_POWER_DOWN
)
4464 if (mii_reg
& MII_CR_AUTO_NEG_EN
) {
4466 hw
->autoneg_advertised
= 0x2F;
4471 else if (mii_reg
& 0x2000)
4475 retval
= e1000_set_spd_dplx(
4483 if (netif_running(adapter
->netdev
))
4484 e1000_reinit_locked(adapter
);
4486 e1000_reset(adapter
);
4488 case M88E1000_PHY_SPEC_CTRL
:
4489 case M88E1000_EXT_PHY_SPEC_CTRL
:
4490 if (e1000_phy_reset(hw
))
4495 switch (data
->reg_num
) {
4497 if (mii_reg
& MII_CR_POWER_DOWN
)
4499 if (netif_running(adapter
->netdev
))
4500 e1000_reinit_locked(adapter
);
4502 e1000_reset(adapter
);
4510 return E1000_SUCCESS
;
4513 void e1000_pci_set_mwi(struct e1000_hw
*hw
)
4515 struct e1000_adapter
*adapter
= hw
->back
;
4516 int ret_val
= pci_set_mwi(adapter
->pdev
);
4519 e_err(probe
, "Error in setting MWI\n");
4522 void e1000_pci_clear_mwi(struct e1000_hw
*hw
)
4524 struct e1000_adapter
*adapter
= hw
->back
;
4526 pci_clear_mwi(adapter
->pdev
);
4529 int e1000_pcix_get_mmrbc(struct e1000_hw
*hw
)
4531 struct e1000_adapter
*adapter
= hw
->back
;
4532 return pcix_get_mmrbc(adapter
->pdev
);
4535 void e1000_pcix_set_mmrbc(struct e1000_hw
*hw
, int mmrbc
)
4537 struct e1000_adapter
*adapter
= hw
->back
;
4538 pcix_set_mmrbc(adapter
->pdev
, mmrbc
);
4541 void e1000_io_write(struct e1000_hw
*hw
, unsigned long port
, u32 value
)
4546 static bool e1000_vlan_used(struct e1000_adapter
*adapter
)
4550 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4555 static void e1000_vlan_filter_on_off(struct e1000_adapter
*adapter
,
4558 struct e1000_hw
*hw
= &adapter
->hw
;
4561 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4562 e1000_irq_disable(adapter
);
4565 /* enable VLAN receive filtering */
4567 rctl
&= ~E1000_RCTL_CFIEN
;
4568 if (!(adapter
->netdev
->flags
& IFF_PROMISC
))
4569 rctl
|= E1000_RCTL_VFE
;
4571 e1000_update_mng_vlan(adapter
);
4573 /* disable VLAN receive filtering */
4575 rctl
&= ~E1000_RCTL_VFE
;
4579 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4580 e1000_irq_enable(adapter
);
4583 static void e1000_vlan_mode(struct net_device
*netdev
,
4584 netdev_features_t features
)
4586 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4587 struct e1000_hw
*hw
= &adapter
->hw
;
4590 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4591 e1000_irq_disable(adapter
);
4594 if (features
& NETIF_F_HW_VLAN_RX
) {
4595 /* enable VLAN tag insert/strip */
4596 ctrl
|= E1000_CTRL_VME
;
4598 /* disable VLAN tag insert/strip */
4599 ctrl
&= ~E1000_CTRL_VME
;
4603 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4604 e1000_irq_enable(adapter
);
4607 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4609 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4610 struct e1000_hw
*hw
= &adapter
->hw
;
4613 if ((hw
->mng_cookie
.status
&
4614 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
4615 (vid
== adapter
->mng_vlan_id
))
4618 if (!e1000_vlan_used(adapter
))
4619 e1000_vlan_filter_on_off(adapter
, true);
4621 /* add VID to filter table */
4622 index
= (vid
>> 5) & 0x7F;
4623 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4624 vfta
|= (1 << (vid
& 0x1F));
4625 e1000_write_vfta(hw
, index
, vfta
);
4627 set_bit(vid
, adapter
->active_vlans
);
4632 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4634 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4635 struct e1000_hw
*hw
= &adapter
->hw
;
4638 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4639 e1000_irq_disable(adapter
);
4640 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4641 e1000_irq_enable(adapter
);
4643 /* remove VID from filter table */
4644 index
= (vid
>> 5) & 0x7F;
4645 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4646 vfta
&= ~(1 << (vid
& 0x1F));
4647 e1000_write_vfta(hw
, index
, vfta
);
4649 clear_bit(vid
, adapter
->active_vlans
);
4651 if (!e1000_vlan_used(adapter
))
4652 e1000_vlan_filter_on_off(adapter
, false);
4657 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
4661 if (!e1000_vlan_used(adapter
))
4664 e1000_vlan_filter_on_off(adapter
, true);
4665 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4666 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
4669 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u32 spd
, u8 dplx
)
4671 struct e1000_hw
*hw
= &adapter
->hw
;
4675 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4676 * for the switch() below to work */
4677 if ((spd
& 1) || (dplx
& ~1))
4680 /* Fiber NICs only allow 1000 gbps Full duplex */
4681 if ((hw
->media_type
== e1000_media_type_fiber
) &&
4682 spd
!= SPEED_1000
&&
4683 dplx
!= DUPLEX_FULL
)
4686 switch (spd
+ dplx
) {
4687 case SPEED_10
+ DUPLEX_HALF
:
4688 hw
->forced_speed_duplex
= e1000_10_half
;
4690 case SPEED_10
+ DUPLEX_FULL
:
4691 hw
->forced_speed_duplex
= e1000_10_full
;
4693 case SPEED_100
+ DUPLEX_HALF
:
4694 hw
->forced_speed_duplex
= e1000_100_half
;
4696 case SPEED_100
+ DUPLEX_FULL
:
4697 hw
->forced_speed_duplex
= e1000_100_full
;
4699 case SPEED_1000
+ DUPLEX_FULL
:
4701 hw
->autoneg_advertised
= ADVERTISE_1000_FULL
;
4703 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4710 e_err(probe
, "Unsupported Speed/Duplex configuration\n");
4714 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4716 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4717 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4718 struct e1000_hw
*hw
= &adapter
->hw
;
4719 u32 ctrl
, ctrl_ext
, rctl
, status
;
4720 u32 wufc
= adapter
->wol
;
4725 netif_device_detach(netdev
);
4727 mutex_lock(&adapter
->mutex
);
4729 if (netif_running(netdev
)) {
4730 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
4731 e1000_down(adapter
);
4735 retval
= pci_save_state(pdev
);
4737 mutex_unlock(&adapter
->mutex
);
4742 status
= er32(STATUS
);
4743 if (status
& E1000_STATUS_LU
)
4744 wufc
&= ~E1000_WUFC_LNKC
;
4747 e1000_setup_rctl(adapter
);
4748 e1000_set_rx_mode(netdev
);
4750 /* turn on all-multi mode if wake on multicast is enabled */
4751 if (wufc
& E1000_WUFC_MC
) {
4753 rctl
|= E1000_RCTL_MPE
;
4757 if (hw
->mac_type
>= e1000_82540
) {
4759 /* advertise wake from D3Cold */
4760 #define E1000_CTRL_ADVD3WUC 0x00100000
4761 /* phy power management enable */
4762 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4763 ctrl
|= E1000_CTRL_ADVD3WUC
|
4764 E1000_CTRL_EN_PHY_PWR_MGMT
;
4768 if (hw
->media_type
== e1000_media_type_fiber
||
4769 hw
->media_type
== e1000_media_type_internal_serdes
) {
4770 /* keep the laser running in D3 */
4771 ctrl_ext
= er32(CTRL_EXT
);
4772 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
4773 ew32(CTRL_EXT
, ctrl_ext
);
4776 ew32(WUC
, E1000_WUC_PME_EN
);
4783 e1000_release_manageability(adapter
);
4785 *enable_wake
= !!wufc
;
4787 /* make sure adapter isn't asleep if manageability is enabled */
4788 if (adapter
->en_mng_pt
)
4789 *enable_wake
= true;
4791 if (netif_running(netdev
))
4792 e1000_free_irq(adapter
);
4794 mutex_unlock(&adapter
->mutex
);
4796 pci_disable_device(pdev
);
4802 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4807 retval
= __e1000_shutdown(pdev
, &wake
);
4812 pci_prepare_to_sleep(pdev
);
4814 pci_wake_from_d3(pdev
, false);
4815 pci_set_power_state(pdev
, PCI_D3hot
);
4821 static int e1000_resume(struct pci_dev
*pdev
)
4823 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4824 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4825 struct e1000_hw
*hw
= &adapter
->hw
;
4828 pci_set_power_state(pdev
, PCI_D0
);
4829 pci_restore_state(pdev
);
4830 pci_save_state(pdev
);
4832 if (adapter
->need_ioport
)
4833 err
= pci_enable_device(pdev
);
4835 err
= pci_enable_device_mem(pdev
);
4837 pr_err("Cannot enable PCI device from suspend\n");
4840 pci_set_master(pdev
);
4842 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4843 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4845 if (netif_running(netdev
)) {
4846 err
= e1000_request_irq(adapter
);
4851 e1000_power_up_phy(adapter
);
4852 e1000_reset(adapter
);
4855 e1000_init_manageability(adapter
);
4857 if (netif_running(netdev
))
4860 netif_device_attach(netdev
);
4866 static void e1000_shutdown(struct pci_dev
*pdev
)
4870 __e1000_shutdown(pdev
, &wake
);
4872 if (system_state
== SYSTEM_POWER_OFF
) {
4873 pci_wake_from_d3(pdev
, wake
);
4874 pci_set_power_state(pdev
, PCI_D3hot
);
4878 #ifdef CONFIG_NET_POLL_CONTROLLER
4880 * Polling 'interrupt' - used by things like netconsole to send skbs
4881 * without having to re-enable interrupts. It's not called while
4882 * the interrupt routine is executing.
4884 static void e1000_netpoll(struct net_device
*netdev
)
4886 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4888 disable_irq(adapter
->pdev
->irq
);
4889 e1000_intr(adapter
->pdev
->irq
, netdev
);
4890 enable_irq(adapter
->pdev
->irq
);
4895 * e1000_io_error_detected - called when PCI error is detected
4896 * @pdev: Pointer to PCI device
4897 * @state: The current pci connection state
4899 * This function is called after a PCI bus error affecting
4900 * this device has been detected.
4902 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
4903 pci_channel_state_t state
)
4905 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4906 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4908 netif_device_detach(netdev
);
4910 if (state
== pci_channel_io_perm_failure
)
4911 return PCI_ERS_RESULT_DISCONNECT
;
4913 if (netif_running(netdev
))
4914 e1000_down(adapter
);
4915 pci_disable_device(pdev
);
4917 /* Request a slot slot reset. */
4918 return PCI_ERS_RESULT_NEED_RESET
;
4922 * e1000_io_slot_reset - called after the pci bus has been reset.
4923 * @pdev: Pointer to PCI device
4925 * Restart the card from scratch, as if from a cold-boot. Implementation
4926 * resembles the first-half of the e1000_resume routine.
4928 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
4930 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4931 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4932 struct e1000_hw
*hw
= &adapter
->hw
;
4935 if (adapter
->need_ioport
)
4936 err
= pci_enable_device(pdev
);
4938 err
= pci_enable_device_mem(pdev
);
4940 pr_err("Cannot re-enable PCI device after reset.\n");
4941 return PCI_ERS_RESULT_DISCONNECT
;
4943 pci_set_master(pdev
);
4945 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4946 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4948 e1000_reset(adapter
);
4951 return PCI_ERS_RESULT_RECOVERED
;
4955 * e1000_io_resume - called when traffic can start flowing again.
4956 * @pdev: Pointer to PCI device
4958 * This callback is called when the error recovery driver tells us that
4959 * its OK to resume normal operation. Implementation resembles the
4960 * second-half of the e1000_resume routine.
4962 static void e1000_io_resume(struct pci_dev
*pdev
)
4964 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4965 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4967 e1000_init_manageability(adapter
);
4969 if (netif_running(netdev
)) {
4970 if (e1000_up(adapter
)) {
4971 pr_info("can't bring device back up after reset\n");
4976 netif_device_attach(netdev
);