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 char e1000_driver_name
[] = "e1000";
33 static char e1000_driver_string
[] = "Intel(R) PRO/1000 Network Driver";
34 #define DRV_VERSION "7.3.21-k6-NAPI"
35 const char e1000_driver_version
[] = DRV_VERSION
;
36 static const char e1000_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
38 /* e1000_pci_tbl - PCI Device ID Table
40 * Last entry must be all 0s
43 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
45 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl
) = {
46 INTEL_E1000_ETHERNET_DEVICE(0x1000),
47 INTEL_E1000_ETHERNET_DEVICE(0x1001),
48 INTEL_E1000_ETHERNET_DEVICE(0x1004),
49 INTEL_E1000_ETHERNET_DEVICE(0x1008),
50 INTEL_E1000_ETHERNET_DEVICE(0x1009),
51 INTEL_E1000_ETHERNET_DEVICE(0x100C),
52 INTEL_E1000_ETHERNET_DEVICE(0x100D),
53 INTEL_E1000_ETHERNET_DEVICE(0x100E),
54 INTEL_E1000_ETHERNET_DEVICE(0x100F),
55 INTEL_E1000_ETHERNET_DEVICE(0x1010),
56 INTEL_E1000_ETHERNET_DEVICE(0x1011),
57 INTEL_E1000_ETHERNET_DEVICE(0x1012),
58 INTEL_E1000_ETHERNET_DEVICE(0x1013),
59 INTEL_E1000_ETHERNET_DEVICE(0x1014),
60 INTEL_E1000_ETHERNET_DEVICE(0x1015),
61 INTEL_E1000_ETHERNET_DEVICE(0x1016),
62 INTEL_E1000_ETHERNET_DEVICE(0x1017),
63 INTEL_E1000_ETHERNET_DEVICE(0x1018),
64 INTEL_E1000_ETHERNET_DEVICE(0x1019),
65 INTEL_E1000_ETHERNET_DEVICE(0x101A),
66 INTEL_E1000_ETHERNET_DEVICE(0x101D),
67 INTEL_E1000_ETHERNET_DEVICE(0x101E),
68 INTEL_E1000_ETHERNET_DEVICE(0x1026),
69 INTEL_E1000_ETHERNET_DEVICE(0x1027),
70 INTEL_E1000_ETHERNET_DEVICE(0x1028),
71 INTEL_E1000_ETHERNET_DEVICE(0x1075),
72 INTEL_E1000_ETHERNET_DEVICE(0x1076),
73 INTEL_E1000_ETHERNET_DEVICE(0x1077),
74 INTEL_E1000_ETHERNET_DEVICE(0x1078),
75 INTEL_E1000_ETHERNET_DEVICE(0x1079),
76 INTEL_E1000_ETHERNET_DEVICE(0x107A),
77 INTEL_E1000_ETHERNET_DEVICE(0x107B),
78 INTEL_E1000_ETHERNET_DEVICE(0x107C),
79 INTEL_E1000_ETHERNET_DEVICE(0x108A),
80 INTEL_E1000_ETHERNET_DEVICE(0x1099),
81 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
82 /* required last entry */
86 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
88 int e1000_up(struct e1000_adapter
*adapter
);
89 void e1000_down(struct e1000_adapter
*adapter
);
90 void e1000_reinit_locked(struct e1000_adapter
*adapter
);
91 void e1000_reset(struct e1000_adapter
*adapter
);
92 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u16 spddplx
);
93 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
);
94 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
);
95 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
);
96 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
);
97 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
98 struct e1000_tx_ring
*txdr
);
99 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
100 struct e1000_rx_ring
*rxdr
);
101 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
102 struct e1000_tx_ring
*tx_ring
);
103 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
104 struct e1000_rx_ring
*rx_ring
);
105 void e1000_update_stats(struct e1000_adapter
*adapter
);
107 static int e1000_init_module(void);
108 static void e1000_exit_module(void);
109 static int e1000_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
110 static void __devexit
e1000_remove(struct pci_dev
*pdev
);
111 static int e1000_alloc_queues(struct e1000_adapter
*adapter
);
112 static int e1000_sw_init(struct e1000_adapter
*adapter
);
113 static int e1000_open(struct net_device
*netdev
);
114 static int e1000_close(struct net_device
*netdev
);
115 static void e1000_configure_tx(struct e1000_adapter
*adapter
);
116 static void e1000_configure_rx(struct e1000_adapter
*adapter
);
117 static void e1000_setup_rctl(struct e1000_adapter
*adapter
);
118 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
);
119 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
);
120 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
121 struct e1000_tx_ring
*tx_ring
);
122 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
123 struct e1000_rx_ring
*rx_ring
);
124 static void e1000_set_rx_mode(struct net_device
*netdev
);
125 static void e1000_update_phy_info(unsigned long data
);
126 static void e1000_watchdog(unsigned long data
);
127 static void e1000_82547_tx_fifo_stall(unsigned long data
);
128 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
129 struct net_device
*netdev
);
130 static struct net_device_stats
* e1000_get_stats(struct net_device
*netdev
);
131 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
);
132 static int e1000_set_mac(struct net_device
*netdev
, void *p
);
133 static irqreturn_t
e1000_intr(int irq
, void *data
);
134 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
135 struct e1000_tx_ring
*tx_ring
);
136 static int e1000_clean(struct napi_struct
*napi
, int budget
);
137 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
138 struct e1000_rx_ring
*rx_ring
,
139 int *work_done
, int work_to_do
);
140 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
141 struct e1000_rx_ring
*rx_ring
,
142 int *work_done
, int work_to_do
);
143 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
144 struct e1000_rx_ring
*rx_ring
,
146 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
147 struct e1000_rx_ring
*rx_ring
,
149 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
);
150 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
152 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
);
153 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
);
154 static void e1000_tx_timeout(struct net_device
*dev
);
155 static void e1000_reset_task(struct work_struct
*work
);
156 static void e1000_smartspeed(struct e1000_adapter
*adapter
);
157 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
158 struct sk_buff
*skb
);
160 static void e1000_vlan_rx_register(struct net_device
*netdev
, struct vlan_group
*grp
);
161 static void e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
);
162 static void e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
);
163 static void e1000_restore_vlan(struct e1000_adapter
*adapter
);
166 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
);
167 static int e1000_resume(struct pci_dev
*pdev
);
169 static void e1000_shutdown(struct pci_dev
*pdev
);
171 #ifdef CONFIG_NET_POLL_CONTROLLER
172 /* for netdump / net console */
173 static void e1000_netpoll (struct net_device
*netdev
);
176 #define COPYBREAK_DEFAULT 256
177 static unsigned int copybreak __read_mostly
= COPYBREAK_DEFAULT
;
178 module_param(copybreak
, uint
, 0644);
179 MODULE_PARM_DESC(copybreak
,
180 "Maximum size of packet that is copied to a new buffer on receive");
182 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
183 pci_channel_state_t state
);
184 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
);
185 static void e1000_io_resume(struct pci_dev
*pdev
);
187 static struct pci_error_handlers e1000_err_handler
= {
188 .error_detected
= e1000_io_error_detected
,
189 .slot_reset
= e1000_io_slot_reset
,
190 .resume
= e1000_io_resume
,
193 static struct pci_driver e1000_driver
= {
194 .name
= e1000_driver_name
,
195 .id_table
= e1000_pci_tbl
,
196 .probe
= e1000_probe
,
197 .remove
= __devexit_p(e1000_remove
),
199 /* Power Managment Hooks */
200 .suspend
= e1000_suspend
,
201 .resume
= e1000_resume
,
203 .shutdown
= e1000_shutdown
,
204 .err_handler
= &e1000_err_handler
207 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
208 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
209 MODULE_LICENSE("GPL");
210 MODULE_VERSION(DRV_VERSION
);
212 static int debug
= NETIF_MSG_DRV
| NETIF_MSG_PROBE
;
213 module_param(debug
, int, 0);
214 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
217 * e1000_get_hw_dev - return device
218 * used by hardware layer to print debugging information
221 struct net_device
*e1000_get_hw_dev(struct e1000_hw
*hw
)
223 struct e1000_adapter
*adapter
= hw
->back
;
224 return adapter
->netdev
;
228 * e1000_init_module - Driver Registration Routine
230 * e1000_init_module is the first routine called when the driver is
231 * loaded. All it does is register with the PCI subsystem.
234 static int __init
e1000_init_module(void)
237 pr_info("%s - version %s\n", e1000_driver_string
, e1000_driver_version
);
239 pr_info("%s\n", e1000_copyright
);
241 ret
= pci_register_driver(&e1000_driver
);
242 if (copybreak
!= COPYBREAK_DEFAULT
) {
244 pr_info("copybreak disabled\n");
246 pr_info("copybreak enabled for "
247 "packets <= %u bytes\n", copybreak
);
252 module_init(e1000_init_module
);
255 * e1000_exit_module - Driver Exit Cleanup Routine
257 * e1000_exit_module is called just before the driver is removed
261 static void __exit
e1000_exit_module(void)
263 pci_unregister_driver(&e1000_driver
);
266 module_exit(e1000_exit_module
);
268 static int e1000_request_irq(struct e1000_adapter
*adapter
)
270 struct net_device
*netdev
= adapter
->netdev
;
271 irq_handler_t handler
= e1000_intr
;
272 int irq_flags
= IRQF_SHARED
;
275 err
= request_irq(adapter
->pdev
->irq
, handler
, irq_flags
, netdev
->name
,
278 e_err("Unable to allocate interrupt Error: %d\n", err
);
284 static void e1000_free_irq(struct e1000_adapter
*adapter
)
286 struct net_device
*netdev
= adapter
->netdev
;
288 free_irq(adapter
->pdev
->irq
, netdev
);
292 * e1000_irq_disable - Mask off interrupt generation on the NIC
293 * @adapter: board private structure
296 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
298 struct e1000_hw
*hw
= &adapter
->hw
;
302 synchronize_irq(adapter
->pdev
->irq
);
306 * e1000_irq_enable - Enable default interrupt generation settings
307 * @adapter: board private structure
310 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
312 struct e1000_hw
*hw
= &adapter
->hw
;
314 ew32(IMS
, IMS_ENABLE_MASK
);
318 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
320 struct e1000_hw
*hw
= &adapter
->hw
;
321 struct net_device
*netdev
= adapter
->netdev
;
322 u16 vid
= hw
->mng_cookie
.vlan_id
;
323 u16 old_vid
= adapter
->mng_vlan_id
;
324 if (adapter
->vlgrp
) {
325 if (!vlan_group_get_device(adapter
->vlgrp
, vid
)) {
326 if (hw
->mng_cookie
.status
&
327 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) {
328 e1000_vlan_rx_add_vid(netdev
, vid
);
329 adapter
->mng_vlan_id
= vid
;
331 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
333 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
335 !vlan_group_get_device(adapter
->vlgrp
, old_vid
))
336 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
338 adapter
->mng_vlan_id
= vid
;
342 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
344 struct e1000_hw
*hw
= &adapter
->hw
;
346 if (adapter
->en_mng_pt
) {
347 u32 manc
= er32(MANC
);
349 /* disable hardware interception of ARP */
350 manc
&= ~(E1000_MANC_ARP_EN
);
356 static void e1000_release_manageability(struct e1000_adapter
*adapter
)
358 struct e1000_hw
*hw
= &adapter
->hw
;
360 if (adapter
->en_mng_pt
) {
361 u32 manc
= er32(MANC
);
363 /* re-enable hardware interception of ARP */
364 manc
|= E1000_MANC_ARP_EN
;
371 * e1000_configure - configure the hardware for RX and TX
372 * @adapter = private board structure
374 static void e1000_configure(struct e1000_adapter
*adapter
)
376 struct net_device
*netdev
= adapter
->netdev
;
379 e1000_set_rx_mode(netdev
);
381 e1000_restore_vlan(adapter
);
382 e1000_init_manageability(adapter
);
384 e1000_configure_tx(adapter
);
385 e1000_setup_rctl(adapter
);
386 e1000_configure_rx(adapter
);
387 /* call E1000_DESC_UNUSED which always leaves
388 * at least 1 descriptor unused to make sure
389 * next_to_use != next_to_clean */
390 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
391 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[i
];
392 adapter
->alloc_rx_buf(adapter
, ring
,
393 E1000_DESC_UNUSED(ring
));
397 int e1000_up(struct e1000_adapter
*adapter
)
399 struct e1000_hw
*hw
= &adapter
->hw
;
401 /* hardware has been reset, we need to reload some things */
402 e1000_configure(adapter
);
404 clear_bit(__E1000_DOWN
, &adapter
->flags
);
406 napi_enable(&adapter
->napi
);
408 e1000_irq_enable(adapter
);
410 netif_wake_queue(adapter
->netdev
);
412 /* fire a link change interrupt to start the watchdog */
413 ew32(ICS
, E1000_ICS_LSC
);
418 * e1000_power_up_phy - restore link in case the phy was powered down
419 * @adapter: address of board private structure
421 * The phy may be powered down to save power and turn off link when the
422 * driver is unloaded and wake on lan is not enabled (among others)
423 * *** this routine MUST be followed by a call to e1000_reset ***
427 void e1000_power_up_phy(struct e1000_adapter
*adapter
)
429 struct e1000_hw
*hw
= &adapter
->hw
;
432 /* Just clear the power down bit to wake the phy back up */
433 if (hw
->media_type
== e1000_media_type_copper
) {
434 /* according to the manual, the phy will retain its
435 * settings across a power-down/up cycle */
436 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
437 mii_reg
&= ~MII_CR_POWER_DOWN
;
438 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
442 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
444 struct e1000_hw
*hw
= &adapter
->hw
;
446 /* Power down the PHY so no link is implied when interface is down *
447 * The PHY cannot be powered down if any of the following is true *
450 * (c) SoL/IDER session is active */
451 if (!adapter
->wol
&& hw
->mac_type
>= e1000_82540
&&
452 hw
->media_type
== e1000_media_type_copper
) {
455 switch (hw
->mac_type
) {
458 case e1000_82545_rev_3
:
460 case e1000_82546_rev_3
:
462 case e1000_82541_rev_2
:
464 case e1000_82547_rev_2
:
465 if (er32(MANC
) & E1000_MANC_SMBUS_EN
)
471 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
472 mii_reg
|= MII_CR_POWER_DOWN
;
473 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
480 void e1000_down(struct e1000_adapter
*adapter
)
482 struct e1000_hw
*hw
= &adapter
->hw
;
483 struct net_device
*netdev
= adapter
->netdev
;
486 /* signal that we're down so the interrupt handler does not
487 * reschedule our watchdog timer */
488 set_bit(__E1000_DOWN
, &adapter
->flags
);
490 /* disable receives in the hardware */
492 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
493 /* flush and sleep below */
495 netif_tx_disable(netdev
);
497 /* disable transmits in the hardware */
499 tctl
&= ~E1000_TCTL_EN
;
501 /* flush both disables and wait for them to finish */
505 napi_disable(&adapter
->napi
);
507 e1000_irq_disable(adapter
);
509 del_timer_sync(&adapter
->tx_fifo_stall_timer
);
510 del_timer_sync(&adapter
->watchdog_timer
);
511 del_timer_sync(&adapter
->phy_info_timer
);
513 adapter
->link_speed
= 0;
514 adapter
->link_duplex
= 0;
515 netif_carrier_off(netdev
);
517 e1000_reset(adapter
);
518 e1000_clean_all_tx_rings(adapter
);
519 e1000_clean_all_rx_rings(adapter
);
522 void e1000_reinit_locked(struct e1000_adapter
*adapter
)
524 WARN_ON(in_interrupt());
525 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
529 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
532 void e1000_reset(struct e1000_adapter
*adapter
)
534 struct e1000_hw
*hw
= &adapter
->hw
;
535 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
536 bool legacy_pba_adjust
= false;
539 /* Repartition Pba for greater than 9k mtu
540 * To take effect CTRL.RST is required.
543 switch (hw
->mac_type
) {
544 case e1000_82542_rev2_0
:
545 case e1000_82542_rev2_1
:
550 case e1000_82541_rev_2
:
551 legacy_pba_adjust
= true;
555 case e1000_82545_rev_3
:
557 case e1000_82546_rev_3
:
561 case e1000_82547_rev_2
:
562 legacy_pba_adjust
= true;
565 case e1000_undefined
:
570 if (legacy_pba_adjust
) {
571 if (hw
->max_frame_size
> E1000_RXBUFFER_8192
)
572 pba
-= 8; /* allocate more FIFO for Tx */
574 if (hw
->mac_type
== e1000_82547
) {
575 adapter
->tx_fifo_head
= 0;
576 adapter
->tx_head_addr
= pba
<< E1000_TX_HEAD_ADDR_SHIFT
;
577 adapter
->tx_fifo_size
=
578 (E1000_PBA_40K
- pba
) << E1000_PBA_BYTES_SHIFT
;
579 atomic_set(&adapter
->tx_fifo_stall
, 0);
581 } else if (hw
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
582 /* adjust PBA for jumbo frames */
585 /* To maintain wire speed transmits, the Tx FIFO should be
586 * large enough to accommodate two full transmit packets,
587 * rounded up to the next 1KB and expressed in KB. Likewise,
588 * the Rx FIFO should be large enough to accommodate at least
589 * one full receive packet and is similarly rounded up and
590 * expressed in KB. */
592 /* upper 16 bits has Tx packet buffer allocation size in KB */
593 tx_space
= pba
>> 16;
594 /* lower 16 bits has Rx packet buffer allocation size in KB */
597 * the tx fifo also stores 16 bytes of information about the tx
598 * but don't include ethernet FCS because hardware appends it
600 min_tx_space
= (hw
->max_frame_size
+
601 sizeof(struct e1000_tx_desc
) -
603 min_tx_space
= ALIGN(min_tx_space
, 1024);
605 /* software strips receive CRC, so leave room for it */
606 min_rx_space
= hw
->max_frame_size
;
607 min_rx_space
= ALIGN(min_rx_space
, 1024);
610 /* If current Tx allocation is less than the min Tx FIFO size,
611 * and the min Tx FIFO size is less than the current Rx FIFO
612 * allocation, take space away from current Rx allocation */
613 if (tx_space
< min_tx_space
&&
614 ((min_tx_space
- tx_space
) < pba
)) {
615 pba
= pba
- (min_tx_space
- tx_space
);
617 /* PCI/PCIx hardware has PBA alignment constraints */
618 switch (hw
->mac_type
) {
619 case e1000_82545
... e1000_82546_rev_3
:
620 pba
&= ~(E1000_PBA_8K
- 1);
626 /* if short on rx space, rx wins and must trump tx
627 * adjustment or use Early Receive if available */
628 if (pba
< min_rx_space
)
636 * flow control settings:
637 * The high water mark must be low enough to fit one full frame
638 * (or the size used for early receive) above it in the Rx FIFO.
639 * Set it to the lower of:
640 * - 90% of the Rx FIFO size, and
641 * - the full Rx FIFO size minus the early receive size (for parts
642 * with ERT support assuming ERT set to E1000_ERT_2048), or
643 * - the full Rx FIFO size minus one full frame
645 hwm
= min(((pba
<< 10) * 9 / 10),
646 ((pba
<< 10) - hw
->max_frame_size
));
648 hw
->fc_high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
649 hw
->fc_low_water
= hw
->fc_high_water
- 8;
650 hw
->fc_pause_time
= E1000_FC_PAUSE_TIME
;
652 hw
->fc
= hw
->original_fc
;
654 /* Allow time for pending master requests to run */
656 if (hw
->mac_type
>= e1000_82544
)
659 if (e1000_init_hw(hw
))
660 e_err("Hardware Error\n");
661 e1000_update_mng_vlan(adapter
);
663 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
664 if (hw
->mac_type
>= e1000_82544
&&
666 hw
->autoneg_advertised
== ADVERTISE_1000_FULL
) {
667 u32 ctrl
= er32(CTRL
);
668 /* clear phy power management bit if we are in gig only mode,
669 * which if enabled will attempt negotiation to 100Mb, which
670 * can cause a loss of link at power off or driver unload */
671 ctrl
&= ~E1000_CTRL_SWDPIN3
;
675 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
676 ew32(VET
, ETHERNET_IEEE_VLAN_TYPE
);
678 e1000_reset_adaptive(hw
);
679 e1000_phy_get_info(hw
, &adapter
->phy_info
);
681 e1000_release_manageability(adapter
);
685 * Dump the eeprom for users having checksum issues
687 static void e1000_dump_eeprom(struct e1000_adapter
*adapter
)
689 struct net_device
*netdev
= adapter
->netdev
;
690 struct ethtool_eeprom eeprom
;
691 const struct ethtool_ops
*ops
= netdev
->ethtool_ops
;
694 u16 csum_old
, csum_new
= 0;
696 eeprom
.len
= ops
->get_eeprom_len(netdev
);
699 data
= kmalloc(eeprom
.len
, GFP_KERNEL
);
701 pr_err("Unable to allocate memory to dump EEPROM data\n");
705 ops
->get_eeprom(netdev
, &eeprom
, data
);
707 csum_old
= (data
[EEPROM_CHECKSUM_REG
* 2]) +
708 (data
[EEPROM_CHECKSUM_REG
* 2 + 1] << 8);
709 for (i
= 0; i
< EEPROM_CHECKSUM_REG
* 2; i
+= 2)
710 csum_new
+= data
[i
] + (data
[i
+ 1] << 8);
711 csum_new
= EEPROM_SUM
- csum_new
;
713 pr_err("/*********************/\n");
714 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old
);
715 pr_err("Calculated : 0x%04x\n", csum_new
);
717 pr_err("Offset Values\n");
718 pr_err("======== ======\n");
719 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 16, 1, data
, 128, 0);
721 pr_err("Include this output when contacting your support provider.\n");
722 pr_err("This is not a software error! Something bad happened to\n");
723 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
724 pr_err("result in further problems, possibly loss of data,\n");
725 pr_err("corruption or system hangs!\n");
726 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
727 pr_err("which is invalid and requires you to set the proper MAC\n");
728 pr_err("address manually before continuing to enable this network\n");
729 pr_err("device. Please inspect the EEPROM dump and report the\n");
730 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
731 pr_err("/*********************/\n");
737 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
738 * @pdev: PCI device information struct
740 * Return true if an adapter needs ioport resources
742 static int e1000_is_need_ioport(struct pci_dev
*pdev
)
744 switch (pdev
->device
) {
745 case E1000_DEV_ID_82540EM
:
746 case E1000_DEV_ID_82540EM_LOM
:
747 case E1000_DEV_ID_82540EP
:
748 case E1000_DEV_ID_82540EP_LOM
:
749 case E1000_DEV_ID_82540EP_LP
:
750 case E1000_DEV_ID_82541EI
:
751 case E1000_DEV_ID_82541EI_MOBILE
:
752 case E1000_DEV_ID_82541ER
:
753 case E1000_DEV_ID_82541ER_LOM
:
754 case E1000_DEV_ID_82541GI
:
755 case E1000_DEV_ID_82541GI_LF
:
756 case E1000_DEV_ID_82541GI_MOBILE
:
757 case E1000_DEV_ID_82544EI_COPPER
:
758 case E1000_DEV_ID_82544EI_FIBER
:
759 case E1000_DEV_ID_82544GC_COPPER
:
760 case E1000_DEV_ID_82544GC_LOM
:
761 case E1000_DEV_ID_82545EM_COPPER
:
762 case E1000_DEV_ID_82545EM_FIBER
:
763 case E1000_DEV_ID_82546EB_COPPER
:
764 case E1000_DEV_ID_82546EB_FIBER
:
765 case E1000_DEV_ID_82546EB_QUAD_COPPER
:
772 static const struct net_device_ops e1000_netdev_ops
= {
773 .ndo_open
= e1000_open
,
774 .ndo_stop
= e1000_close
,
775 .ndo_start_xmit
= e1000_xmit_frame
,
776 .ndo_get_stats
= e1000_get_stats
,
777 .ndo_set_rx_mode
= e1000_set_rx_mode
,
778 .ndo_set_mac_address
= e1000_set_mac
,
779 .ndo_tx_timeout
= e1000_tx_timeout
,
780 .ndo_change_mtu
= e1000_change_mtu
,
781 .ndo_do_ioctl
= e1000_ioctl
,
782 .ndo_validate_addr
= eth_validate_addr
,
784 .ndo_vlan_rx_register
= e1000_vlan_rx_register
,
785 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
786 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
787 #ifdef CONFIG_NET_POLL_CONTROLLER
788 .ndo_poll_controller
= e1000_netpoll
,
793 * e1000_probe - Device Initialization Routine
794 * @pdev: PCI device information struct
795 * @ent: entry in e1000_pci_tbl
797 * Returns 0 on success, negative on failure
799 * e1000_probe initializes an adapter identified by a pci_dev structure.
800 * The OS initialization, configuring of the adapter private structure,
801 * and a hardware reset occur.
803 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
804 const struct pci_device_id
*ent
)
806 struct net_device
*netdev
;
807 struct e1000_adapter
*adapter
;
810 static int cards_found
= 0;
811 static int global_quad_port_a
= 0; /* global ksp3 port a indication */
812 int i
, err
, pci_using_dac
;
814 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
815 int bars
, need_ioport
;
817 /* do not allocate ioport bars when not needed */
818 need_ioport
= e1000_is_need_ioport(pdev
);
820 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
821 err
= pci_enable_device(pdev
);
823 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
824 err
= pci_enable_device_mem(pdev
);
829 if (!dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64)) &&
830 !dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64))) {
833 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
835 err
= dma_set_coherent_mask(&pdev
->dev
,
838 pr_err("No usable DMA config, aborting\n");
845 err
= pci_request_selected_regions(pdev
, bars
, e1000_driver_name
);
849 pci_set_master(pdev
);
850 err
= pci_save_state(pdev
);
852 goto err_alloc_etherdev
;
855 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
857 goto err_alloc_etherdev
;
859 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
861 pci_set_drvdata(pdev
, netdev
);
862 adapter
= netdev_priv(netdev
);
863 adapter
->netdev
= netdev
;
864 adapter
->pdev
= pdev
;
865 adapter
->msg_enable
= (1 << debug
) - 1;
866 adapter
->bars
= bars
;
867 adapter
->need_ioport
= need_ioport
;
873 hw
->hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
877 if (adapter
->need_ioport
) {
878 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
879 if (pci_resource_len(pdev
, i
) == 0)
881 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
882 hw
->io_base
= pci_resource_start(pdev
, i
);
888 netdev
->netdev_ops
= &e1000_netdev_ops
;
889 e1000_set_ethtool_ops(netdev
);
890 netdev
->watchdog_timeo
= 5 * HZ
;
891 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
893 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
895 adapter
->bd_number
= cards_found
;
897 /* setup the private structure */
899 err
= e1000_sw_init(adapter
);
905 if (hw
->mac_type
>= e1000_82543
) {
906 netdev
->features
= NETIF_F_SG
|
910 NETIF_F_HW_VLAN_FILTER
;
913 if ((hw
->mac_type
>= e1000_82544
) &&
914 (hw
->mac_type
!= e1000_82547
))
915 netdev
->features
|= NETIF_F_TSO
;
918 netdev
->features
|= NETIF_F_HIGHDMA
;
920 netdev
->vlan_features
|= NETIF_F_TSO
;
921 netdev
->vlan_features
|= NETIF_F_HW_CSUM
;
922 netdev
->vlan_features
|= NETIF_F_SG
;
924 adapter
->en_mng_pt
= e1000_enable_mng_pass_thru(hw
);
926 /* initialize eeprom parameters */
927 if (e1000_init_eeprom_params(hw
)) {
928 e_err("EEPROM initialization failed\n");
932 /* before reading the EEPROM, reset the controller to
933 * put the device in a known good starting state */
937 /* make sure the EEPROM is good */
938 if (e1000_validate_eeprom_checksum(hw
) < 0) {
939 e_err("The EEPROM Checksum Is Not Valid\n");
940 e1000_dump_eeprom(adapter
);
942 * set MAC address to all zeroes to invalidate and temporary
943 * disable this device for the user. This blocks regular
944 * traffic while still permitting ethtool ioctls from reaching
945 * the hardware as well as allowing the user to run the
946 * interface after manually setting a hw addr using
949 memset(hw
->mac_addr
, 0, netdev
->addr_len
);
951 /* copy the MAC address out of the EEPROM */
952 if (e1000_read_mac_addr(hw
))
953 e_err("EEPROM Read Error\n");
955 /* don't block initalization here due to bad MAC address */
956 memcpy(netdev
->dev_addr
, hw
->mac_addr
, netdev
->addr_len
);
957 memcpy(netdev
->perm_addr
, hw
->mac_addr
, netdev
->addr_len
);
959 if (!is_valid_ether_addr(netdev
->perm_addr
))
960 e_err("Invalid MAC Address\n");
962 e1000_get_bus_info(hw
);
964 init_timer(&adapter
->tx_fifo_stall_timer
);
965 adapter
->tx_fifo_stall_timer
.function
= &e1000_82547_tx_fifo_stall
;
966 adapter
->tx_fifo_stall_timer
.data
= (unsigned long)adapter
;
968 init_timer(&adapter
->watchdog_timer
);
969 adapter
->watchdog_timer
.function
= &e1000_watchdog
;
970 adapter
->watchdog_timer
.data
= (unsigned long) adapter
;
972 init_timer(&adapter
->phy_info_timer
);
973 adapter
->phy_info_timer
.function
= &e1000_update_phy_info
;
974 adapter
->phy_info_timer
.data
= (unsigned long)adapter
;
976 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
978 e1000_check_options(adapter
);
980 /* Initial Wake on LAN setting
981 * If APM wake is enabled in the EEPROM,
982 * enable the ACPI Magic Packet filter
985 switch (hw
->mac_type
) {
986 case e1000_82542_rev2_0
:
987 case e1000_82542_rev2_1
:
991 e1000_read_eeprom(hw
,
992 EEPROM_INIT_CONTROL2_REG
, 1, &eeprom_data
);
993 eeprom_apme_mask
= E1000_EEPROM_82544_APM
;
996 case e1000_82546_rev_3
:
997 if (er32(STATUS
) & E1000_STATUS_FUNC_1
){
998 e1000_read_eeprom(hw
,
999 EEPROM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
1004 e1000_read_eeprom(hw
,
1005 EEPROM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1008 if (eeprom_data
& eeprom_apme_mask
)
1009 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1011 /* now that we have the eeprom settings, apply the special cases
1012 * where the eeprom may be wrong or the board simply won't support
1013 * wake on lan on a particular port */
1014 switch (pdev
->device
) {
1015 case E1000_DEV_ID_82546GB_PCIE
:
1016 adapter
->eeprom_wol
= 0;
1018 case E1000_DEV_ID_82546EB_FIBER
:
1019 case E1000_DEV_ID_82546GB_FIBER
:
1020 /* Wake events only supported on port A for dual fiber
1021 * regardless of eeprom setting */
1022 if (er32(STATUS
) & E1000_STATUS_FUNC_1
)
1023 adapter
->eeprom_wol
= 0;
1025 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3
:
1026 /* if quad port adapter, disable WoL on all but port A */
1027 if (global_quad_port_a
!= 0)
1028 adapter
->eeprom_wol
= 0;
1030 adapter
->quad_port_a
= 1;
1031 /* Reset for multiple quad port adapters */
1032 if (++global_quad_port_a
== 4)
1033 global_quad_port_a
= 0;
1037 /* initialize the wol settings based on the eeprom settings */
1038 adapter
->wol
= adapter
->eeprom_wol
;
1039 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1041 /* reset the hardware with the new settings */
1042 e1000_reset(adapter
);
1044 strcpy(netdev
->name
, "eth%d");
1045 err
= register_netdev(netdev
);
1049 /* print bus type/speed/width info */
1050 e_info("(PCI%s:%dMHz:%d-bit) %pM\n",
1051 ((hw
->bus_type
== e1000_bus_type_pcix
) ? "-X" : ""),
1052 ((hw
->bus_speed
== e1000_bus_speed_133
) ? 133 :
1053 (hw
->bus_speed
== e1000_bus_speed_120
) ? 120 :
1054 (hw
->bus_speed
== e1000_bus_speed_100
) ? 100 :
1055 (hw
->bus_speed
== e1000_bus_speed_66
) ? 66 : 33),
1056 ((hw
->bus_width
== e1000_bus_width_64
) ? 64 : 32),
1059 /* carrier off reporting is important to ethtool even BEFORE open */
1060 netif_carrier_off(netdev
);
1062 e_info("Intel(R) PRO/1000 Network Connection\n");
1069 e1000_phy_hw_reset(hw
);
1071 if (hw
->flash_address
)
1072 iounmap(hw
->flash_address
);
1073 kfree(adapter
->tx_ring
);
1074 kfree(adapter
->rx_ring
);
1076 iounmap(hw
->hw_addr
);
1078 free_netdev(netdev
);
1080 pci_release_selected_regions(pdev
, bars
);
1083 pci_disable_device(pdev
);
1088 * e1000_remove - Device Removal Routine
1089 * @pdev: PCI device information struct
1091 * e1000_remove is called by the PCI subsystem to alert the driver
1092 * that it should release a PCI device. The could be caused by a
1093 * Hot-Plug event, or because the driver is going to be removed from
1097 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
1099 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1100 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1101 struct e1000_hw
*hw
= &adapter
->hw
;
1103 set_bit(__E1000_DOWN
, &adapter
->flags
);
1104 del_timer_sync(&adapter
->tx_fifo_stall_timer
);
1105 del_timer_sync(&adapter
->watchdog_timer
);
1106 del_timer_sync(&adapter
->phy_info_timer
);
1108 cancel_work_sync(&adapter
->reset_task
);
1110 e1000_release_manageability(adapter
);
1112 unregister_netdev(netdev
);
1114 e1000_phy_hw_reset(hw
);
1116 kfree(adapter
->tx_ring
);
1117 kfree(adapter
->rx_ring
);
1119 iounmap(hw
->hw_addr
);
1120 if (hw
->flash_address
)
1121 iounmap(hw
->flash_address
);
1122 pci_release_selected_regions(pdev
, adapter
->bars
);
1124 free_netdev(netdev
);
1126 pci_disable_device(pdev
);
1130 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1131 * @adapter: board private structure to initialize
1133 * e1000_sw_init initializes the Adapter private data structure.
1134 * Fields are initialized based on PCI device information and
1135 * OS network device settings (MTU size).
1138 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
1140 struct e1000_hw
*hw
= &adapter
->hw
;
1141 struct net_device
*netdev
= adapter
->netdev
;
1142 struct pci_dev
*pdev
= adapter
->pdev
;
1144 /* PCI config space info */
1146 hw
->vendor_id
= pdev
->vendor
;
1147 hw
->device_id
= pdev
->device
;
1148 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
1149 hw
->subsystem_id
= pdev
->subsystem_device
;
1150 hw
->revision_id
= pdev
->revision
;
1152 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->pci_cmd_word
);
1154 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1155 hw
->max_frame_size
= netdev
->mtu
+
1156 ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
1157 hw
->min_frame_size
= MINIMUM_ETHERNET_FRAME_SIZE
;
1159 /* identify the MAC */
1161 if (e1000_set_mac_type(hw
)) {
1162 e_err("Unknown MAC Type\n");
1166 switch (hw
->mac_type
) {
1171 case e1000_82541_rev_2
:
1172 case e1000_82547_rev_2
:
1173 hw
->phy_init_script
= 1;
1177 e1000_set_media_type(hw
);
1179 hw
->wait_autoneg_complete
= false;
1180 hw
->tbi_compatibility_en
= true;
1181 hw
->adaptive_ifs
= true;
1183 /* Copper options */
1185 if (hw
->media_type
== e1000_media_type_copper
) {
1186 hw
->mdix
= AUTO_ALL_MODES
;
1187 hw
->disable_polarity_correction
= false;
1188 hw
->master_slave
= E1000_MASTER_SLAVE
;
1191 adapter
->num_tx_queues
= 1;
1192 adapter
->num_rx_queues
= 1;
1194 if (e1000_alloc_queues(adapter
)) {
1195 e_err("Unable to allocate memory for queues\n");
1199 /* Explicitly disable IRQ since the NIC can be in any state. */
1200 e1000_irq_disable(adapter
);
1202 spin_lock_init(&adapter
->stats_lock
);
1204 set_bit(__E1000_DOWN
, &adapter
->flags
);
1210 * e1000_alloc_queues - Allocate memory for all rings
1211 * @adapter: board private structure to initialize
1213 * We allocate one ring per queue at run-time since we don't know the
1214 * number of queues at compile-time.
1217 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1219 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
1220 sizeof(struct e1000_tx_ring
), GFP_KERNEL
);
1221 if (!adapter
->tx_ring
)
1224 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
1225 sizeof(struct e1000_rx_ring
), GFP_KERNEL
);
1226 if (!adapter
->rx_ring
) {
1227 kfree(adapter
->tx_ring
);
1231 return E1000_SUCCESS
;
1235 * e1000_open - Called when a network interface is made active
1236 * @netdev: network interface device structure
1238 * Returns 0 on success, negative value on failure
1240 * The open entry point is called when a network interface is made
1241 * active by the system (IFF_UP). At this point all resources needed
1242 * for transmit and receive operations are allocated, the interrupt
1243 * handler is registered with the OS, the watchdog timer is started,
1244 * and the stack is notified that the interface is ready.
1247 static int e1000_open(struct net_device
*netdev
)
1249 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1250 struct e1000_hw
*hw
= &adapter
->hw
;
1253 /* disallow open during test */
1254 if (test_bit(__E1000_TESTING
, &adapter
->flags
))
1257 netif_carrier_off(netdev
);
1259 /* allocate transmit descriptors */
1260 err
= e1000_setup_all_tx_resources(adapter
);
1264 /* allocate receive descriptors */
1265 err
= e1000_setup_all_rx_resources(adapter
);
1269 e1000_power_up_phy(adapter
);
1271 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
1272 if ((hw
->mng_cookie
.status
&
1273 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
)) {
1274 e1000_update_mng_vlan(adapter
);
1277 /* before we allocate an interrupt, we must be ready to handle it.
1278 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1279 * as soon as we call pci_request_irq, so we have to setup our
1280 * clean_rx handler before we do so. */
1281 e1000_configure(adapter
);
1283 err
= e1000_request_irq(adapter
);
1287 /* From here on the code is the same as e1000_up() */
1288 clear_bit(__E1000_DOWN
, &adapter
->flags
);
1290 napi_enable(&adapter
->napi
);
1292 e1000_irq_enable(adapter
);
1294 netif_start_queue(netdev
);
1296 /* fire a link status change interrupt to start the watchdog */
1297 ew32(ICS
, E1000_ICS_LSC
);
1299 return E1000_SUCCESS
;
1302 e1000_power_down_phy(adapter
);
1303 e1000_free_all_rx_resources(adapter
);
1305 e1000_free_all_tx_resources(adapter
);
1307 e1000_reset(adapter
);
1313 * e1000_close - Disables a network interface
1314 * @netdev: network interface device structure
1316 * Returns 0, this is not allowed to fail
1318 * The close entry point is called when an interface is de-activated
1319 * by the OS. The hardware is still under the drivers control, but
1320 * needs to be disabled. A global MAC reset is issued to stop the
1321 * hardware, and all transmit and receive resources are freed.
1324 static int e1000_close(struct net_device
*netdev
)
1326 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1327 struct e1000_hw
*hw
= &adapter
->hw
;
1329 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
1330 e1000_down(adapter
);
1331 e1000_power_down_phy(adapter
);
1332 e1000_free_irq(adapter
);
1334 e1000_free_all_tx_resources(adapter
);
1335 e1000_free_all_rx_resources(adapter
);
1337 /* kill manageability vlan ID if supported, but not if a vlan with
1338 * the same ID is registered on the host OS (let 8021q kill it) */
1339 if ((hw
->mng_cookie
.status
&
1340 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
1342 vlan_group_get_device(adapter
->vlgrp
, adapter
->mng_vlan_id
))) {
1343 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1350 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1351 * @adapter: address of board private structure
1352 * @start: address of beginning of memory
1353 * @len: length of memory
1355 static bool e1000_check_64k_bound(struct e1000_adapter
*adapter
, void *start
,
1358 struct e1000_hw
*hw
= &adapter
->hw
;
1359 unsigned long begin
= (unsigned long)start
;
1360 unsigned long end
= begin
+ len
;
1362 /* First rev 82545 and 82546 need to not allow any memory
1363 * write location to cross 64k boundary due to errata 23 */
1364 if (hw
->mac_type
== e1000_82545
||
1365 hw
->mac_type
== e1000_82546
) {
1366 return ((begin
^ (end
- 1)) >> 16) != 0 ? false : true;
1373 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1374 * @adapter: board private structure
1375 * @txdr: tx descriptor ring (for a specific queue) to setup
1377 * Return 0 on success, negative on failure
1380 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
1381 struct e1000_tx_ring
*txdr
)
1383 struct pci_dev
*pdev
= adapter
->pdev
;
1386 size
= sizeof(struct e1000_buffer
) * txdr
->count
;
1387 txdr
->buffer_info
= vmalloc(size
);
1388 if (!txdr
->buffer_info
) {
1389 e_err("Unable to allocate memory for the Tx descriptor ring\n");
1392 memset(txdr
->buffer_info
, 0, size
);
1394 /* round up to nearest 4K */
1396 txdr
->size
= txdr
->count
* sizeof(struct e1000_tx_desc
);
1397 txdr
->size
= ALIGN(txdr
->size
, 4096);
1399 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
1403 vfree(txdr
->buffer_info
);
1404 e_err("Unable to allocate memory for the Tx descriptor ring\n");
1408 /* Fix for errata 23, can't cross 64kB boundary */
1409 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1410 void *olddesc
= txdr
->desc
;
1411 dma_addr_t olddma
= txdr
->dma
;
1412 e_err("txdr align check failed: %u bytes at %p\n",
1413 txdr
->size
, txdr
->desc
);
1414 /* Try again, without freeing the previous */
1415 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
,
1416 &txdr
->dma
, GFP_KERNEL
);
1417 /* Failed allocation, critical failure */
1419 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1421 goto setup_tx_desc_die
;
1424 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1426 dma_free_coherent(&pdev
->dev
, txdr
->size
, txdr
->desc
,
1428 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1430 e_err("Unable to allocate aligned memory "
1431 "for the transmit descriptor ring\n");
1432 vfree(txdr
->buffer_info
);
1435 /* Free old allocation, new allocation was successful */
1436 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1440 memset(txdr
->desc
, 0, txdr
->size
);
1442 txdr
->next_to_use
= 0;
1443 txdr
->next_to_clean
= 0;
1449 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1450 * (Descriptors) for all queues
1451 * @adapter: board private structure
1453 * Return 0 on success, negative on failure
1456 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
)
1460 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1461 err
= e1000_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1463 e_err("Allocation for Tx Queue %u failed\n", i
);
1464 for (i
-- ; i
>= 0; i
--)
1465 e1000_free_tx_resources(adapter
,
1466 &adapter
->tx_ring
[i
]);
1475 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1476 * @adapter: board private structure
1478 * Configure the Tx unit of the MAC after a reset.
1481 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
1484 struct e1000_hw
*hw
= &adapter
->hw
;
1485 u32 tdlen
, tctl
, tipg
;
1488 /* Setup the HW Tx Head and Tail descriptor pointers */
1490 switch (adapter
->num_tx_queues
) {
1493 tdba
= adapter
->tx_ring
[0].dma
;
1494 tdlen
= adapter
->tx_ring
[0].count
*
1495 sizeof(struct e1000_tx_desc
);
1497 ew32(TDBAH
, (tdba
>> 32));
1498 ew32(TDBAL
, (tdba
& 0x00000000ffffffffULL
));
1501 adapter
->tx_ring
[0].tdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDH
: E1000_82542_TDH
);
1502 adapter
->tx_ring
[0].tdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDT
: E1000_82542_TDT
);
1506 /* Set the default values for the Tx Inter Packet Gap timer */
1507 if ((hw
->media_type
== e1000_media_type_fiber
||
1508 hw
->media_type
== e1000_media_type_internal_serdes
))
1509 tipg
= DEFAULT_82543_TIPG_IPGT_FIBER
;
1511 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
;
1513 switch (hw
->mac_type
) {
1514 case e1000_82542_rev2_0
:
1515 case e1000_82542_rev2_1
:
1516 tipg
= DEFAULT_82542_TIPG_IPGT
;
1517 ipgr1
= DEFAULT_82542_TIPG_IPGR1
;
1518 ipgr2
= DEFAULT_82542_TIPG_IPGR2
;
1521 ipgr1
= DEFAULT_82543_TIPG_IPGR1
;
1522 ipgr2
= DEFAULT_82543_TIPG_IPGR2
;
1525 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
1526 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
1529 /* Set the Tx Interrupt Delay register */
1531 ew32(TIDV
, adapter
->tx_int_delay
);
1532 if (hw
->mac_type
>= e1000_82540
)
1533 ew32(TADV
, adapter
->tx_abs_int_delay
);
1535 /* Program the Transmit Control Register */
1538 tctl
&= ~E1000_TCTL_CT
;
1539 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1540 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1542 e1000_config_collision_dist(hw
);
1544 /* Setup Transmit Descriptor Settings for eop descriptor */
1545 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
1547 /* only set IDE if we are delaying interrupts using the timers */
1548 if (adapter
->tx_int_delay
)
1549 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
1551 if (hw
->mac_type
< e1000_82543
)
1552 adapter
->txd_cmd
|= E1000_TXD_CMD_RPS
;
1554 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
1556 /* Cache if we're 82544 running in PCI-X because we'll
1557 * need this to apply a workaround later in the send path. */
1558 if (hw
->mac_type
== e1000_82544
&&
1559 hw
->bus_type
== e1000_bus_type_pcix
)
1560 adapter
->pcix_82544
= 1;
1567 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1568 * @adapter: board private structure
1569 * @rxdr: rx descriptor ring (for a specific queue) to setup
1571 * Returns 0 on success, negative on failure
1574 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
1575 struct e1000_rx_ring
*rxdr
)
1577 struct pci_dev
*pdev
= adapter
->pdev
;
1580 size
= sizeof(struct e1000_buffer
) * rxdr
->count
;
1581 rxdr
->buffer_info
= vmalloc(size
);
1582 if (!rxdr
->buffer_info
) {
1583 e_err("Unable to allocate memory for the Rx descriptor ring\n");
1586 memset(rxdr
->buffer_info
, 0, size
);
1588 desc_len
= sizeof(struct e1000_rx_desc
);
1590 /* Round up to nearest 4K */
1592 rxdr
->size
= rxdr
->count
* desc_len
;
1593 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
1595 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
1599 e_err("Unable to allocate memory for the Rx descriptor ring\n");
1601 vfree(rxdr
->buffer_info
);
1605 /* Fix for errata 23, can't cross 64kB boundary */
1606 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1607 void *olddesc
= rxdr
->desc
;
1608 dma_addr_t olddma
= rxdr
->dma
;
1609 e_err("rxdr align check failed: %u bytes at %p\n",
1610 rxdr
->size
, rxdr
->desc
);
1611 /* Try again, without freeing the previous */
1612 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
,
1613 &rxdr
->dma
, GFP_KERNEL
);
1614 /* Failed allocation, critical failure */
1616 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1618 e_err("Unable to allocate memory for the Rx descriptor "
1620 goto setup_rx_desc_die
;
1623 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1625 dma_free_coherent(&pdev
->dev
, rxdr
->size
, rxdr
->desc
,
1627 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1629 e_err("Unable to allocate aligned memory for the Rx "
1630 "descriptor ring\n");
1631 goto setup_rx_desc_die
;
1633 /* Free old allocation, new allocation was successful */
1634 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1638 memset(rxdr
->desc
, 0, rxdr
->size
);
1640 rxdr
->next_to_clean
= 0;
1641 rxdr
->next_to_use
= 0;
1642 rxdr
->rx_skb_top
= NULL
;
1648 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1649 * (Descriptors) for all queues
1650 * @adapter: board private structure
1652 * Return 0 on success, negative on failure
1655 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
)
1659 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1660 err
= e1000_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1662 e_err("Allocation for Rx Queue %u failed\n", i
);
1663 for (i
-- ; i
>= 0; i
--)
1664 e1000_free_rx_resources(adapter
,
1665 &adapter
->rx_ring
[i
]);
1674 * e1000_setup_rctl - configure the receive control registers
1675 * @adapter: Board private structure
1677 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
1679 struct e1000_hw
*hw
= &adapter
->hw
;
1684 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1686 rctl
|= E1000_RCTL_EN
| E1000_RCTL_BAM
|
1687 E1000_RCTL_LBM_NO
| E1000_RCTL_RDMTS_HALF
|
1688 (hw
->mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1690 if (hw
->tbi_compatibility_on
== 1)
1691 rctl
|= E1000_RCTL_SBP
;
1693 rctl
&= ~E1000_RCTL_SBP
;
1695 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1696 rctl
&= ~E1000_RCTL_LPE
;
1698 rctl
|= E1000_RCTL_LPE
;
1700 /* Setup buffer sizes */
1701 rctl
&= ~E1000_RCTL_SZ_4096
;
1702 rctl
|= E1000_RCTL_BSEX
;
1703 switch (adapter
->rx_buffer_len
) {
1704 case E1000_RXBUFFER_2048
:
1706 rctl
|= E1000_RCTL_SZ_2048
;
1707 rctl
&= ~E1000_RCTL_BSEX
;
1709 case E1000_RXBUFFER_4096
:
1710 rctl
|= E1000_RCTL_SZ_4096
;
1712 case E1000_RXBUFFER_8192
:
1713 rctl
|= E1000_RCTL_SZ_8192
;
1715 case E1000_RXBUFFER_16384
:
1716 rctl
|= E1000_RCTL_SZ_16384
;
1724 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1725 * @adapter: board private structure
1727 * Configure the Rx unit of the MAC after a reset.
1730 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
1733 struct e1000_hw
*hw
= &adapter
->hw
;
1734 u32 rdlen
, rctl
, rxcsum
;
1736 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1737 rdlen
= adapter
->rx_ring
[0].count
*
1738 sizeof(struct e1000_rx_desc
);
1739 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
1740 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
1742 rdlen
= adapter
->rx_ring
[0].count
*
1743 sizeof(struct e1000_rx_desc
);
1744 adapter
->clean_rx
= e1000_clean_rx_irq
;
1745 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
1748 /* disable receives while setting up the descriptors */
1750 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1752 /* set the Receive Delay Timer Register */
1753 ew32(RDTR
, adapter
->rx_int_delay
);
1755 if (hw
->mac_type
>= e1000_82540
) {
1756 ew32(RADV
, adapter
->rx_abs_int_delay
);
1757 if (adapter
->itr_setting
!= 0)
1758 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
1761 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1762 * the Base and Length of the Rx Descriptor Ring */
1763 switch (adapter
->num_rx_queues
) {
1766 rdba
= adapter
->rx_ring
[0].dma
;
1768 ew32(RDBAH
, (rdba
>> 32));
1769 ew32(RDBAL
, (rdba
& 0x00000000ffffffffULL
));
1772 adapter
->rx_ring
[0].rdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDH
: E1000_82542_RDH
);
1773 adapter
->rx_ring
[0].rdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDT
: E1000_82542_RDT
);
1777 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1778 if (hw
->mac_type
>= e1000_82543
) {
1779 rxcsum
= er32(RXCSUM
);
1780 if (adapter
->rx_csum
)
1781 rxcsum
|= E1000_RXCSUM_TUOFL
;
1783 /* don't need to clear IPPCSE as it defaults to 0 */
1784 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1785 ew32(RXCSUM
, rxcsum
);
1788 /* Enable Receives */
1793 * e1000_free_tx_resources - Free Tx Resources per Queue
1794 * @adapter: board private structure
1795 * @tx_ring: Tx descriptor ring for a specific queue
1797 * Free all transmit software resources
1800 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
1801 struct e1000_tx_ring
*tx_ring
)
1803 struct pci_dev
*pdev
= adapter
->pdev
;
1805 e1000_clean_tx_ring(adapter
, tx_ring
);
1807 vfree(tx_ring
->buffer_info
);
1808 tx_ring
->buffer_info
= NULL
;
1810 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1813 tx_ring
->desc
= NULL
;
1817 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1818 * @adapter: board private structure
1820 * Free all transmit software resources
1823 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
)
1827 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1828 e1000_free_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1831 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter
*adapter
,
1832 struct e1000_buffer
*buffer_info
)
1834 if (buffer_info
->dma
) {
1835 if (buffer_info
->mapped_as_page
)
1836 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1837 buffer_info
->length
, DMA_TO_DEVICE
);
1839 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1840 buffer_info
->length
,
1842 buffer_info
->dma
= 0;
1844 if (buffer_info
->skb
) {
1845 dev_kfree_skb_any(buffer_info
->skb
);
1846 buffer_info
->skb
= NULL
;
1848 buffer_info
->time_stamp
= 0;
1849 /* buffer_info must be completely set up in the transmit path */
1853 * e1000_clean_tx_ring - Free Tx Buffers
1854 * @adapter: board private structure
1855 * @tx_ring: ring to be cleaned
1858 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
1859 struct e1000_tx_ring
*tx_ring
)
1861 struct e1000_hw
*hw
= &adapter
->hw
;
1862 struct e1000_buffer
*buffer_info
;
1866 /* Free all the Tx ring sk_buffs */
1868 for (i
= 0; i
< tx_ring
->count
; i
++) {
1869 buffer_info
= &tx_ring
->buffer_info
[i
];
1870 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
1873 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
1874 memset(tx_ring
->buffer_info
, 0, size
);
1876 /* Zero out the descriptor ring */
1878 memset(tx_ring
->desc
, 0, tx_ring
->size
);
1880 tx_ring
->next_to_use
= 0;
1881 tx_ring
->next_to_clean
= 0;
1882 tx_ring
->last_tx_tso
= 0;
1884 writel(0, hw
->hw_addr
+ tx_ring
->tdh
);
1885 writel(0, hw
->hw_addr
+ tx_ring
->tdt
);
1889 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
1890 * @adapter: board private structure
1893 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
)
1897 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1898 e1000_clean_tx_ring(adapter
, &adapter
->tx_ring
[i
]);
1902 * e1000_free_rx_resources - Free Rx Resources
1903 * @adapter: board private structure
1904 * @rx_ring: ring to clean the resources from
1906 * Free all receive software resources
1909 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
1910 struct e1000_rx_ring
*rx_ring
)
1912 struct pci_dev
*pdev
= adapter
->pdev
;
1914 e1000_clean_rx_ring(adapter
, rx_ring
);
1916 vfree(rx_ring
->buffer_info
);
1917 rx_ring
->buffer_info
= NULL
;
1919 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
1922 rx_ring
->desc
= NULL
;
1926 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
1927 * @adapter: board private structure
1929 * Free all receive software resources
1932 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
)
1936 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
1937 e1000_free_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1941 * e1000_clean_rx_ring - Free Rx Buffers per Queue
1942 * @adapter: board private structure
1943 * @rx_ring: ring to free buffers from
1946 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
1947 struct e1000_rx_ring
*rx_ring
)
1949 struct e1000_hw
*hw
= &adapter
->hw
;
1950 struct e1000_buffer
*buffer_info
;
1951 struct pci_dev
*pdev
= adapter
->pdev
;
1955 /* Free all the Rx ring sk_buffs */
1956 for (i
= 0; i
< rx_ring
->count
; i
++) {
1957 buffer_info
= &rx_ring
->buffer_info
[i
];
1958 if (buffer_info
->dma
&&
1959 adapter
->clean_rx
== e1000_clean_rx_irq
) {
1960 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
1961 buffer_info
->length
,
1963 } else if (buffer_info
->dma
&&
1964 adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
) {
1965 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
1966 buffer_info
->length
,
1970 buffer_info
->dma
= 0;
1971 if (buffer_info
->page
) {
1972 put_page(buffer_info
->page
);
1973 buffer_info
->page
= NULL
;
1975 if (buffer_info
->skb
) {
1976 dev_kfree_skb(buffer_info
->skb
);
1977 buffer_info
->skb
= NULL
;
1981 /* there also may be some cached data from a chained receive */
1982 if (rx_ring
->rx_skb_top
) {
1983 dev_kfree_skb(rx_ring
->rx_skb_top
);
1984 rx_ring
->rx_skb_top
= NULL
;
1987 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
1988 memset(rx_ring
->buffer_info
, 0, size
);
1990 /* Zero out the descriptor ring */
1991 memset(rx_ring
->desc
, 0, rx_ring
->size
);
1993 rx_ring
->next_to_clean
= 0;
1994 rx_ring
->next_to_use
= 0;
1996 writel(0, hw
->hw_addr
+ rx_ring
->rdh
);
1997 writel(0, hw
->hw_addr
+ rx_ring
->rdt
);
2001 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2002 * @adapter: board private structure
2005 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
)
2009 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2010 e1000_clean_rx_ring(adapter
, &adapter
->rx_ring
[i
]);
2013 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2014 * and memory write and invalidate disabled for certain operations
2016 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
)
2018 struct e1000_hw
*hw
= &adapter
->hw
;
2019 struct net_device
*netdev
= adapter
->netdev
;
2022 e1000_pci_clear_mwi(hw
);
2025 rctl
|= E1000_RCTL_RST
;
2027 E1000_WRITE_FLUSH();
2030 if (netif_running(netdev
))
2031 e1000_clean_all_rx_rings(adapter
);
2034 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
)
2036 struct e1000_hw
*hw
= &adapter
->hw
;
2037 struct net_device
*netdev
= adapter
->netdev
;
2041 rctl
&= ~E1000_RCTL_RST
;
2043 E1000_WRITE_FLUSH();
2046 if (hw
->pci_cmd_word
& PCI_COMMAND_INVALIDATE
)
2047 e1000_pci_set_mwi(hw
);
2049 if (netif_running(netdev
)) {
2050 /* No need to loop, because 82542 supports only 1 queue */
2051 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[0];
2052 e1000_configure_rx(adapter
);
2053 adapter
->alloc_rx_buf(adapter
, ring
, E1000_DESC_UNUSED(ring
));
2058 * e1000_set_mac - Change the Ethernet Address of the NIC
2059 * @netdev: network interface device structure
2060 * @p: pointer to an address structure
2062 * Returns 0 on success, negative on failure
2065 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
2067 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2068 struct e1000_hw
*hw
= &adapter
->hw
;
2069 struct sockaddr
*addr
= p
;
2071 if (!is_valid_ether_addr(addr
->sa_data
))
2072 return -EADDRNOTAVAIL
;
2074 /* 82542 2.0 needs to be in reset to write receive address registers */
2076 if (hw
->mac_type
== e1000_82542_rev2_0
)
2077 e1000_enter_82542_rst(adapter
);
2079 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2080 memcpy(hw
->mac_addr
, addr
->sa_data
, netdev
->addr_len
);
2082 e1000_rar_set(hw
, hw
->mac_addr
, 0);
2084 if (hw
->mac_type
== e1000_82542_rev2_0
)
2085 e1000_leave_82542_rst(adapter
);
2091 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2092 * @netdev: network interface device structure
2094 * The set_rx_mode entry point is called whenever the unicast or multicast
2095 * address lists or the network interface flags are updated. This routine is
2096 * responsible for configuring the hardware for proper unicast, multicast,
2097 * promiscuous mode, and all-multi behavior.
2100 static void e1000_set_rx_mode(struct net_device
*netdev
)
2102 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2103 struct e1000_hw
*hw
= &adapter
->hw
;
2104 struct netdev_hw_addr
*ha
;
2105 bool use_uc
= false;
2108 int i
, rar_entries
= E1000_RAR_ENTRIES
;
2109 int mta_reg_count
= E1000_NUM_MTA_REGISTERS
;
2110 u32
*mcarray
= kcalloc(mta_reg_count
, sizeof(u32
), GFP_ATOMIC
);
2113 e_err("memory allocation failed\n");
2117 /* Check for Promiscuous and All Multicast modes */
2121 if (netdev
->flags
& IFF_PROMISC
) {
2122 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2123 rctl
&= ~E1000_RCTL_VFE
;
2125 if (netdev
->flags
& IFF_ALLMULTI
)
2126 rctl
|= E1000_RCTL_MPE
;
2128 rctl
&= ~E1000_RCTL_MPE
;
2129 /* Enable VLAN filter if there is a VLAN */
2131 rctl
|= E1000_RCTL_VFE
;
2134 if (netdev_uc_count(netdev
) > rar_entries
- 1) {
2135 rctl
|= E1000_RCTL_UPE
;
2136 } else if (!(netdev
->flags
& IFF_PROMISC
)) {
2137 rctl
&= ~E1000_RCTL_UPE
;
2143 /* 82542 2.0 needs to be in reset to write receive address registers */
2145 if (hw
->mac_type
== e1000_82542_rev2_0
)
2146 e1000_enter_82542_rst(adapter
);
2148 /* load the first 14 addresses into the exact filters 1-14. Unicast
2149 * addresses take precedence to avoid disabling unicast filtering
2152 * RAR 0 is used for the station MAC adddress
2153 * if there are not 14 addresses, go ahead and clear the filters
2157 netdev_for_each_uc_addr(ha
, netdev
) {
2158 if (i
== rar_entries
)
2160 e1000_rar_set(hw
, ha
->addr
, i
++);
2163 netdev_for_each_mc_addr(ha
, netdev
) {
2164 if (i
== rar_entries
) {
2165 /* load any remaining addresses into the hash table */
2166 u32 hash_reg
, hash_bit
, mta
;
2167 hash_value
= e1000_hash_mc_addr(hw
, ha
->addr
);
2168 hash_reg
= (hash_value
>> 5) & 0x7F;
2169 hash_bit
= hash_value
& 0x1F;
2170 mta
= (1 << hash_bit
);
2171 mcarray
[hash_reg
] |= mta
;
2173 e1000_rar_set(hw
, ha
->addr
, i
++);
2177 for (; i
< rar_entries
; i
++) {
2178 E1000_WRITE_REG_ARRAY(hw
, RA
, i
<< 1, 0);
2179 E1000_WRITE_FLUSH();
2180 E1000_WRITE_REG_ARRAY(hw
, RA
, (i
<< 1) + 1, 0);
2181 E1000_WRITE_FLUSH();
2184 /* write the hash table completely, write from bottom to avoid
2185 * both stupid write combining chipsets, and flushing each write */
2186 for (i
= mta_reg_count
- 1; i
>= 0 ; i
--) {
2188 * If we are on an 82544 has an errata where writing odd
2189 * offsets overwrites the previous even offset, but writing
2190 * backwards over the range solves the issue by always
2191 * writing the odd offset first
2193 E1000_WRITE_REG_ARRAY(hw
, MTA
, i
, mcarray
[i
]);
2195 E1000_WRITE_FLUSH();
2197 if (hw
->mac_type
== e1000_82542_rev2_0
)
2198 e1000_leave_82542_rst(adapter
);
2203 /* Need to wait a few seconds after link up to get diagnostic information from
2206 static void e1000_update_phy_info(unsigned long data
)
2208 struct e1000_adapter
*adapter
= (struct e1000_adapter
*)data
;
2209 struct e1000_hw
*hw
= &adapter
->hw
;
2210 e1000_phy_get_info(hw
, &adapter
->phy_info
);
2214 * e1000_82547_tx_fifo_stall - Timer Call-back
2215 * @data: pointer to adapter cast into an unsigned long
2218 static void e1000_82547_tx_fifo_stall(unsigned long data
)
2220 struct e1000_adapter
*adapter
= (struct e1000_adapter
*)data
;
2221 struct e1000_hw
*hw
= &adapter
->hw
;
2222 struct net_device
*netdev
= adapter
->netdev
;
2225 if (atomic_read(&adapter
->tx_fifo_stall
)) {
2226 if ((er32(TDT
) == er32(TDH
)) &&
2227 (er32(TDFT
) == er32(TDFH
)) &&
2228 (er32(TDFTS
) == er32(TDFHS
))) {
2230 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
2231 ew32(TDFT
, adapter
->tx_head_addr
);
2232 ew32(TDFH
, adapter
->tx_head_addr
);
2233 ew32(TDFTS
, adapter
->tx_head_addr
);
2234 ew32(TDFHS
, adapter
->tx_head_addr
);
2236 E1000_WRITE_FLUSH();
2238 adapter
->tx_fifo_head
= 0;
2239 atomic_set(&adapter
->tx_fifo_stall
, 0);
2240 netif_wake_queue(netdev
);
2241 } else if (!test_bit(__E1000_DOWN
, &adapter
->flags
)) {
2242 mod_timer(&adapter
->tx_fifo_stall_timer
, jiffies
+ 1);
2247 bool e1000_has_link(struct e1000_adapter
*adapter
)
2249 struct e1000_hw
*hw
= &adapter
->hw
;
2250 bool link_active
= false;
2252 /* get_link_status is set on LSC (link status) interrupt or
2253 * rx sequence error interrupt. get_link_status will stay
2254 * false until the e1000_check_for_link establishes link
2255 * for copper adapters ONLY
2257 switch (hw
->media_type
) {
2258 case e1000_media_type_copper
:
2259 if (hw
->get_link_status
) {
2260 e1000_check_for_link(hw
);
2261 link_active
= !hw
->get_link_status
;
2266 case e1000_media_type_fiber
:
2267 e1000_check_for_link(hw
);
2268 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
2270 case e1000_media_type_internal_serdes
:
2271 e1000_check_for_link(hw
);
2272 link_active
= hw
->serdes_has_link
;
2282 * e1000_watchdog - Timer Call-back
2283 * @data: pointer to adapter cast into an unsigned long
2285 static void e1000_watchdog(unsigned long data
)
2287 struct e1000_adapter
*adapter
= (struct e1000_adapter
*)data
;
2288 struct e1000_hw
*hw
= &adapter
->hw
;
2289 struct net_device
*netdev
= adapter
->netdev
;
2290 struct e1000_tx_ring
*txdr
= adapter
->tx_ring
;
2293 link
= e1000_has_link(adapter
);
2294 if ((netif_carrier_ok(netdev
)) && link
)
2298 if (!netif_carrier_ok(netdev
)) {
2301 /* update snapshot of PHY registers on LSC */
2302 e1000_get_speed_and_duplex(hw
,
2303 &adapter
->link_speed
,
2304 &adapter
->link_duplex
);
2307 pr_info("%s NIC Link is Up %d Mbps %s, "
2308 "Flow Control: %s\n",
2310 adapter
->link_speed
,
2311 adapter
->link_duplex
== FULL_DUPLEX
?
2312 "Full Duplex" : "Half Duplex",
2313 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2314 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2315 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2316 E1000_CTRL_TFCE
) ? "TX" : "None")));
2318 /* adjust timeout factor according to speed/duplex */
2319 adapter
->tx_timeout_factor
= 1;
2320 switch (adapter
->link_speed
) {
2323 adapter
->tx_timeout_factor
= 16;
2327 /* maybe add some timeout factor ? */
2331 /* enable transmits in the hardware */
2333 tctl
|= E1000_TCTL_EN
;
2336 netif_carrier_on(netdev
);
2337 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2338 mod_timer(&adapter
->phy_info_timer
,
2339 round_jiffies(jiffies
+ 2 * HZ
));
2340 adapter
->smartspeed
= 0;
2343 if (netif_carrier_ok(netdev
)) {
2344 adapter
->link_speed
= 0;
2345 adapter
->link_duplex
= 0;
2346 pr_info("%s NIC Link is Down\n",
2348 netif_carrier_off(netdev
);
2350 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2351 mod_timer(&adapter
->phy_info_timer
,
2352 round_jiffies(jiffies
+ 2 * HZ
));
2355 e1000_smartspeed(adapter
);
2359 e1000_update_stats(adapter
);
2361 hw
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2362 adapter
->tpt_old
= adapter
->stats
.tpt
;
2363 hw
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2364 adapter
->colc_old
= adapter
->stats
.colc
;
2366 adapter
->gorcl
= adapter
->stats
.gorcl
- adapter
->gorcl_old
;
2367 adapter
->gorcl_old
= adapter
->stats
.gorcl
;
2368 adapter
->gotcl
= adapter
->stats
.gotcl
- adapter
->gotcl_old
;
2369 adapter
->gotcl_old
= adapter
->stats
.gotcl
;
2371 e1000_update_adaptive(hw
);
2373 if (!netif_carrier_ok(netdev
)) {
2374 if (E1000_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
2375 /* We've lost link, so the controller stops DMA,
2376 * but we've got queued Tx work that's never going
2377 * to get done, so reset controller to flush Tx.
2378 * (Do the reset outside of interrupt context). */
2379 adapter
->tx_timeout_count
++;
2380 schedule_work(&adapter
->reset_task
);
2381 /* return immediately since reset is imminent */
2386 /* Simple mode for Interrupt Throttle Rate (ITR) */
2387 if (hw
->mac_type
>= e1000_82540
&& adapter
->itr_setting
== 4) {
2389 * Symmetric Tx/Rx gets a reduced ITR=2000;
2390 * Total asymmetrical Tx or Rx gets ITR=8000;
2391 * everyone else is between 2000-8000.
2393 u32 goc
= (adapter
->gotcl
+ adapter
->gorcl
) / 10000;
2394 u32 dif
= (adapter
->gotcl
> adapter
->gorcl
?
2395 adapter
->gotcl
- adapter
->gorcl
:
2396 adapter
->gorcl
- adapter
->gotcl
) / 10000;
2397 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
2399 ew32(ITR
, 1000000000 / (itr
* 256));
2402 /* Cause software interrupt to ensure rx ring is cleaned */
2403 ew32(ICS
, E1000_ICS_RXDMT0
);
2405 /* Force detection of hung controller every watchdog period */
2406 adapter
->detect_tx_hung
= true;
2408 /* Reset the timer */
2409 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2410 mod_timer(&adapter
->watchdog_timer
,
2411 round_jiffies(jiffies
+ 2 * HZ
));
2414 enum latency_range
{
2418 latency_invalid
= 255
2422 * e1000_update_itr - update the dynamic ITR value based on statistics
2423 * @adapter: pointer to adapter
2424 * @itr_setting: current adapter->itr
2425 * @packets: the number of packets during this measurement interval
2426 * @bytes: the number of bytes during this measurement interval
2428 * Stores a new ITR value based on packets and byte
2429 * counts during the last interrupt. The advantage of per interrupt
2430 * computation is faster updates and more accurate ITR for the current
2431 * traffic pattern. Constants in this function were computed
2432 * based on theoretical maximum wire speed and thresholds were set based
2433 * on testing data as well as attempting to minimize response time
2434 * while increasing bulk throughput.
2435 * this functionality is controlled by the InterruptThrottleRate module
2436 * parameter (see e1000_param.c)
2438 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2439 u16 itr_setting
, int packets
, int bytes
)
2441 unsigned int retval
= itr_setting
;
2442 struct e1000_hw
*hw
= &adapter
->hw
;
2444 if (unlikely(hw
->mac_type
< e1000_82540
))
2445 goto update_itr_done
;
2448 goto update_itr_done
;
2450 switch (itr_setting
) {
2451 case lowest_latency
:
2452 /* jumbo frames get bulk treatment*/
2453 if (bytes
/packets
> 8000)
2454 retval
= bulk_latency
;
2455 else if ((packets
< 5) && (bytes
> 512))
2456 retval
= low_latency
;
2458 case low_latency
: /* 50 usec aka 20000 ints/s */
2459 if (bytes
> 10000) {
2460 /* jumbo frames need bulk latency setting */
2461 if (bytes
/packets
> 8000)
2462 retval
= bulk_latency
;
2463 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2464 retval
= bulk_latency
;
2465 else if ((packets
> 35))
2466 retval
= lowest_latency
;
2467 } else if (bytes
/packets
> 2000)
2468 retval
= bulk_latency
;
2469 else if (packets
<= 2 && bytes
< 512)
2470 retval
= lowest_latency
;
2472 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2473 if (bytes
> 25000) {
2475 retval
= low_latency
;
2476 } else if (bytes
< 6000) {
2477 retval
= low_latency
;
2486 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2488 struct e1000_hw
*hw
= &adapter
->hw
;
2490 u32 new_itr
= adapter
->itr
;
2492 if (unlikely(hw
->mac_type
< e1000_82540
))
2495 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2496 if (unlikely(adapter
->link_speed
!= SPEED_1000
)) {
2502 adapter
->tx_itr
= e1000_update_itr(adapter
,
2504 adapter
->total_tx_packets
,
2505 adapter
->total_tx_bytes
);
2506 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2507 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2508 adapter
->tx_itr
= low_latency
;
2510 adapter
->rx_itr
= e1000_update_itr(adapter
,
2512 adapter
->total_rx_packets
,
2513 adapter
->total_rx_bytes
);
2514 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2515 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2516 adapter
->rx_itr
= low_latency
;
2518 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2520 switch (current_itr
) {
2521 /* counts and packets in update_itr are dependent on these numbers */
2522 case lowest_latency
:
2526 new_itr
= 20000; /* aka hwitr = ~200 */
2536 if (new_itr
!= adapter
->itr
) {
2537 /* this attempts to bias the interrupt rate towards Bulk
2538 * by adding intermediate steps when interrupt rate is
2540 new_itr
= new_itr
> adapter
->itr
?
2541 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2543 adapter
->itr
= new_itr
;
2544 ew32(ITR
, 1000000000 / (new_itr
* 256));
2548 #define E1000_TX_FLAGS_CSUM 0x00000001
2549 #define E1000_TX_FLAGS_VLAN 0x00000002
2550 #define E1000_TX_FLAGS_TSO 0x00000004
2551 #define E1000_TX_FLAGS_IPV4 0x00000008
2552 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2553 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2555 static int e1000_tso(struct e1000_adapter
*adapter
,
2556 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2558 struct e1000_context_desc
*context_desc
;
2559 struct e1000_buffer
*buffer_info
;
2562 u16 ipcse
= 0, tucse
, mss
;
2563 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
2566 if (skb_is_gso(skb
)) {
2567 if (skb_header_cloned(skb
)) {
2568 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2573 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2574 mss
= skb_shinfo(skb
)->gso_size
;
2575 if (skb
->protocol
== htons(ETH_P_IP
)) {
2576 struct iphdr
*iph
= ip_hdr(skb
);
2579 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2583 cmd_length
= E1000_TXD_CMD_IP
;
2584 ipcse
= skb_transport_offset(skb
) - 1;
2585 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
2586 ipv6_hdr(skb
)->payload_len
= 0;
2587 tcp_hdr(skb
)->check
=
2588 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2589 &ipv6_hdr(skb
)->daddr
,
2593 ipcss
= skb_network_offset(skb
);
2594 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
2595 tucss
= skb_transport_offset(skb
);
2596 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
2599 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
2600 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
2602 i
= tx_ring
->next_to_use
;
2603 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2604 buffer_info
= &tx_ring
->buffer_info
[i
];
2606 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
2607 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
2608 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
2609 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
2610 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
2611 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
2612 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
2613 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
2614 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
2616 buffer_info
->time_stamp
= jiffies
;
2617 buffer_info
->next_to_watch
= i
;
2619 if (++i
== tx_ring
->count
) i
= 0;
2620 tx_ring
->next_to_use
= i
;
2627 static bool e1000_tx_csum(struct e1000_adapter
*adapter
,
2628 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2630 struct e1000_context_desc
*context_desc
;
2631 struct e1000_buffer
*buffer_info
;
2634 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
2636 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
2639 switch (skb
->protocol
) {
2640 case cpu_to_be16(ETH_P_IP
):
2641 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2642 cmd_len
|= E1000_TXD_CMD_TCP
;
2644 case cpu_to_be16(ETH_P_IPV6
):
2645 /* XXX not handling all IPV6 headers */
2646 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2647 cmd_len
|= E1000_TXD_CMD_TCP
;
2650 if (unlikely(net_ratelimit()))
2651 e_warn("checksum_partial proto=%x!\n", skb
->protocol
);
2655 css
= skb_transport_offset(skb
);
2657 i
= tx_ring
->next_to_use
;
2658 buffer_info
= &tx_ring
->buffer_info
[i
];
2659 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2661 context_desc
->lower_setup
.ip_config
= 0;
2662 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
2663 context_desc
->upper_setup
.tcp_fields
.tucso
=
2664 css
+ skb
->csum_offset
;
2665 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
2666 context_desc
->tcp_seg_setup
.data
= 0;
2667 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
2669 buffer_info
->time_stamp
= jiffies
;
2670 buffer_info
->next_to_watch
= i
;
2672 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2673 tx_ring
->next_to_use
= i
;
2678 #define E1000_MAX_TXD_PWR 12
2679 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2681 static int e1000_tx_map(struct e1000_adapter
*adapter
,
2682 struct e1000_tx_ring
*tx_ring
,
2683 struct sk_buff
*skb
, unsigned int first
,
2684 unsigned int max_per_txd
, unsigned int nr_frags
,
2687 struct e1000_hw
*hw
= &adapter
->hw
;
2688 struct pci_dev
*pdev
= adapter
->pdev
;
2689 struct e1000_buffer
*buffer_info
;
2690 unsigned int len
= skb_headlen(skb
);
2691 unsigned int offset
= 0, size
, count
= 0, i
;
2694 i
= tx_ring
->next_to_use
;
2697 buffer_info
= &tx_ring
->buffer_info
[i
];
2698 size
= min(len
, max_per_txd
);
2699 /* Workaround for Controller erratum --
2700 * descriptor for non-tso packet in a linear SKB that follows a
2701 * tso gets written back prematurely before the data is fully
2702 * DMA'd to the controller */
2703 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&&
2705 tx_ring
->last_tx_tso
= 0;
2709 /* Workaround for premature desc write-backs
2710 * in TSO mode. Append 4-byte sentinel desc */
2711 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
2713 /* work-around for errata 10 and it applies
2714 * to all controllers in PCI-X mode
2715 * The fix is to make sure that the first descriptor of a
2716 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2718 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
2719 (size
> 2015) && count
== 0))
2722 /* Workaround for potential 82544 hang in PCI-X. Avoid
2723 * terminating buffers within evenly-aligned dwords. */
2724 if (unlikely(adapter
->pcix_82544
&&
2725 !((unsigned long)(skb
->data
+ offset
+ size
- 1) & 4) &&
2729 buffer_info
->length
= size
;
2730 /* set time_stamp *before* dma to help avoid a possible race */
2731 buffer_info
->time_stamp
= jiffies
;
2732 buffer_info
->mapped_as_page
= false;
2733 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2735 size
, DMA_TO_DEVICE
);
2736 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2738 buffer_info
->next_to_watch
= i
;
2745 if (unlikely(i
== tx_ring
->count
))
2750 for (f
= 0; f
< nr_frags
; f
++) {
2751 struct skb_frag_struct
*frag
;
2753 frag
= &skb_shinfo(skb
)->frags
[f
];
2755 offset
= frag
->page_offset
;
2759 if (unlikely(i
== tx_ring
->count
))
2762 buffer_info
= &tx_ring
->buffer_info
[i
];
2763 size
= min(len
, max_per_txd
);
2764 /* Workaround for premature desc write-backs
2765 * in TSO mode. Append 4-byte sentinel desc */
2766 if (unlikely(mss
&& f
== (nr_frags
-1) && size
== len
&& size
> 8))
2768 /* Workaround for potential 82544 hang in PCI-X.
2769 * Avoid terminating buffers within evenly-aligned
2771 if (unlikely(adapter
->pcix_82544
&&
2772 !((unsigned long)(page_to_phys(frag
->page
) + offset
2777 buffer_info
->length
= size
;
2778 buffer_info
->time_stamp
= jiffies
;
2779 buffer_info
->mapped_as_page
= true;
2780 buffer_info
->dma
= dma_map_page(&pdev
->dev
, frag
->page
,
2783 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2785 buffer_info
->next_to_watch
= i
;
2793 tx_ring
->buffer_info
[i
].skb
= skb
;
2794 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2799 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2800 buffer_info
->dma
= 0;
2806 i
+= tx_ring
->count
;
2808 buffer_info
= &tx_ring
->buffer_info
[i
];
2809 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2815 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
2816 struct e1000_tx_ring
*tx_ring
, int tx_flags
,
2819 struct e1000_hw
*hw
= &adapter
->hw
;
2820 struct e1000_tx_desc
*tx_desc
= NULL
;
2821 struct e1000_buffer
*buffer_info
;
2822 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
2825 if (likely(tx_flags
& E1000_TX_FLAGS_TSO
)) {
2826 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
2828 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2830 if (likely(tx_flags
& E1000_TX_FLAGS_IPV4
))
2831 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
2834 if (likely(tx_flags
& E1000_TX_FLAGS_CSUM
)) {
2835 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
2836 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2839 if (unlikely(tx_flags
& E1000_TX_FLAGS_VLAN
)) {
2840 txd_lower
|= E1000_TXD_CMD_VLE
;
2841 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
2844 i
= tx_ring
->next_to_use
;
2847 buffer_info
= &tx_ring
->buffer_info
[i
];
2848 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
2849 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
2850 tx_desc
->lower
.data
=
2851 cpu_to_le32(txd_lower
| buffer_info
->length
);
2852 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
2853 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2856 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
2858 /* Force memory writes to complete before letting h/w
2859 * know there are new descriptors to fetch. (Only
2860 * applicable for weak-ordered memory model archs,
2861 * such as IA-64). */
2864 tx_ring
->next_to_use
= i
;
2865 writel(i
, hw
->hw_addr
+ tx_ring
->tdt
);
2866 /* we need this if more than one processor can write to our tail
2867 * at a time, it syncronizes IO on IA64/Altix systems */
2872 * 82547 workaround to avoid controller hang in half-duplex environment.
2873 * The workaround is to avoid queuing a large packet that would span
2874 * the internal Tx FIFO ring boundary by notifying the stack to resend
2875 * the packet at a later time. This gives the Tx FIFO an opportunity to
2876 * flush all packets. When that occurs, we reset the Tx FIFO pointers
2877 * to the beginning of the Tx FIFO.
2880 #define E1000_FIFO_HDR 0x10
2881 #define E1000_82547_PAD_LEN 0x3E0
2883 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
2884 struct sk_buff
*skb
)
2886 u32 fifo_space
= adapter
->tx_fifo_size
- adapter
->tx_fifo_head
;
2887 u32 skb_fifo_len
= skb
->len
+ E1000_FIFO_HDR
;
2889 skb_fifo_len
= ALIGN(skb_fifo_len
, E1000_FIFO_HDR
);
2891 if (adapter
->link_duplex
!= HALF_DUPLEX
)
2892 goto no_fifo_stall_required
;
2894 if (atomic_read(&adapter
->tx_fifo_stall
))
2897 if (skb_fifo_len
>= (E1000_82547_PAD_LEN
+ fifo_space
)) {
2898 atomic_set(&adapter
->tx_fifo_stall
, 1);
2902 no_fifo_stall_required
:
2903 adapter
->tx_fifo_head
+= skb_fifo_len
;
2904 if (adapter
->tx_fifo_head
>= adapter
->tx_fifo_size
)
2905 adapter
->tx_fifo_head
-= adapter
->tx_fifo_size
;
2909 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
2911 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2912 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
2914 netif_stop_queue(netdev
);
2915 /* Herbert's original patch had:
2916 * smp_mb__after_netif_stop_queue();
2917 * but since that doesn't exist yet, just open code it. */
2920 /* We need to check again in a case another CPU has just
2921 * made room available. */
2922 if (likely(E1000_DESC_UNUSED(tx_ring
) < size
))
2926 netif_start_queue(netdev
);
2927 ++adapter
->restart_queue
;
2931 static int e1000_maybe_stop_tx(struct net_device
*netdev
,
2932 struct e1000_tx_ring
*tx_ring
, int size
)
2934 if (likely(E1000_DESC_UNUSED(tx_ring
) >= size
))
2936 return __e1000_maybe_stop_tx(netdev
, size
);
2939 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
2940 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
2941 struct net_device
*netdev
)
2943 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2944 struct e1000_hw
*hw
= &adapter
->hw
;
2945 struct e1000_tx_ring
*tx_ring
;
2946 unsigned int first
, max_per_txd
= E1000_MAX_DATA_PER_TXD
;
2947 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
2948 unsigned int tx_flags
= 0;
2949 unsigned int len
= skb_headlen(skb
);
2950 unsigned int nr_frags
;
2956 /* This goes back to the question of how to logically map a tx queue
2957 * to a flow. Right now, performance is impacted slightly negatively
2958 * if using multiple tx queues. If the stack breaks away from a
2959 * single qdisc implementation, we can look at this again. */
2960 tx_ring
= adapter
->tx_ring
;
2962 if (unlikely(skb
->len
<= 0)) {
2963 dev_kfree_skb_any(skb
);
2964 return NETDEV_TX_OK
;
2967 mss
= skb_shinfo(skb
)->gso_size
;
2968 /* The controller does a simple calculation to
2969 * make sure there is enough room in the FIFO before
2970 * initiating the DMA for each buffer. The calc is:
2971 * 4 = ceil(buffer len/mss). To make sure we don't
2972 * overrun the FIFO, adjust the max buffer len if mss
2976 max_per_txd
= min(mss
<< 2, max_per_txd
);
2977 max_txd_pwr
= fls(max_per_txd
) - 1;
2979 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2980 if (skb
->data_len
&& hdr_len
== len
) {
2981 switch (hw
->mac_type
) {
2982 unsigned int pull_size
;
2984 /* Make sure we have room to chop off 4 bytes,
2985 * and that the end alignment will work out to
2986 * this hardware's requirements
2987 * NOTE: this is a TSO only workaround
2988 * if end byte alignment not correct move us
2989 * into the next dword */
2990 if ((unsigned long)(skb_tail_pointer(skb
) - 1) & 4)
2993 pull_size
= min((unsigned int)4, skb
->data_len
);
2994 if (!__pskb_pull_tail(skb
, pull_size
)) {
2995 e_err("__pskb_pull_tail failed.\n");
2996 dev_kfree_skb_any(skb
);
2997 return NETDEV_TX_OK
;
2999 len
= skb_headlen(skb
);
3008 /* reserve a descriptor for the offload context */
3009 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
3013 /* Controller Erratum workaround */
3014 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&& !skb_is_gso(skb
))
3017 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
3019 if (adapter
->pcix_82544
)
3022 /* work-around for errata 10 and it applies to all controllers
3023 * in PCI-X mode, so add one more descriptor to the count
3025 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
3029 nr_frags
= skb_shinfo(skb
)->nr_frags
;
3030 for (f
= 0; f
< nr_frags
; f
++)
3031 count
+= TXD_USE_COUNT(skb_shinfo(skb
)->frags
[f
].size
,
3033 if (adapter
->pcix_82544
)
3036 /* need: count + 2 desc gap to keep tail from touching
3037 * head, otherwise try next time */
3038 if (unlikely(e1000_maybe_stop_tx(netdev
, tx_ring
, count
+ 2)))
3039 return NETDEV_TX_BUSY
;
3041 if (unlikely(hw
->mac_type
== e1000_82547
)) {
3042 if (unlikely(e1000_82547_fifo_workaround(adapter
, skb
))) {
3043 netif_stop_queue(netdev
);
3044 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3045 mod_timer(&adapter
->tx_fifo_stall_timer
,
3047 return NETDEV_TX_BUSY
;
3051 if (unlikely(adapter
->vlgrp
&& vlan_tx_tag_present(skb
))) {
3052 tx_flags
|= E1000_TX_FLAGS_VLAN
;
3053 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
3056 first
= tx_ring
->next_to_use
;
3058 tso
= e1000_tso(adapter
, tx_ring
, skb
);
3060 dev_kfree_skb_any(skb
);
3061 return NETDEV_TX_OK
;
3065 if (likely(hw
->mac_type
!= e1000_82544
))
3066 tx_ring
->last_tx_tso
= 1;
3067 tx_flags
|= E1000_TX_FLAGS_TSO
;
3068 } else if (likely(e1000_tx_csum(adapter
, tx_ring
, skb
)))
3069 tx_flags
|= E1000_TX_FLAGS_CSUM
;
3071 if (likely(skb
->protocol
== htons(ETH_P_IP
)))
3072 tx_flags
|= E1000_TX_FLAGS_IPV4
;
3074 count
= e1000_tx_map(adapter
, tx_ring
, skb
, first
, max_per_txd
,
3078 e1000_tx_queue(adapter
, tx_ring
, tx_flags
, count
);
3079 /* Make sure there is space in the ring for the next send. */
3080 e1000_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 2);
3083 dev_kfree_skb_any(skb
);
3084 tx_ring
->buffer_info
[first
].time_stamp
= 0;
3085 tx_ring
->next_to_use
= first
;
3088 return NETDEV_TX_OK
;
3092 * e1000_tx_timeout - Respond to a Tx Hang
3093 * @netdev: network interface device structure
3096 static void e1000_tx_timeout(struct net_device
*netdev
)
3098 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3100 /* Do the reset outside of interrupt context */
3101 adapter
->tx_timeout_count
++;
3102 schedule_work(&adapter
->reset_task
);
3105 static void e1000_reset_task(struct work_struct
*work
)
3107 struct e1000_adapter
*adapter
=
3108 container_of(work
, struct e1000_adapter
, reset_task
);
3110 e1000_reinit_locked(adapter
);
3114 * e1000_get_stats - Get System Network Statistics
3115 * @netdev: network interface device structure
3117 * Returns the address of the device statistics structure.
3118 * The statistics are actually updated from the timer callback.
3121 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
3123 /* only return the current stats */
3124 return &netdev
->stats
;
3128 * e1000_change_mtu - Change the Maximum Transfer Unit
3129 * @netdev: network interface device structure
3130 * @new_mtu: new value for maximum frame size
3132 * Returns 0 on success, negative on failure
3135 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
3137 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3138 struct e1000_hw
*hw
= &adapter
->hw
;
3139 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
3141 if ((max_frame
< MINIMUM_ETHERNET_FRAME_SIZE
) ||
3142 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3143 e_err("Invalid MTU setting\n");
3147 /* Adapter-specific max frame size limits. */
3148 switch (hw
->mac_type
) {
3149 case e1000_undefined
... e1000_82542_rev2_1
:
3150 if (max_frame
> (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) {
3151 e_err("Jumbo Frames not supported.\n");
3156 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3160 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
3162 /* e1000_down has a dependency on max_frame_size */
3163 hw
->max_frame_size
= max_frame
;
3164 if (netif_running(netdev
))
3165 e1000_down(adapter
);
3167 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3168 * means we reserve 2 more, this pushes us to allocate from the next
3170 * i.e. RXBUFFER_2048 --> size-4096 slab
3171 * however with the new *_jumbo_rx* routines, jumbo receives will use
3172 * fragmented skbs */
3174 if (max_frame
<= E1000_RXBUFFER_2048
)
3175 adapter
->rx_buffer_len
= E1000_RXBUFFER_2048
;
3177 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3178 adapter
->rx_buffer_len
= E1000_RXBUFFER_16384
;
3179 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3180 adapter
->rx_buffer_len
= PAGE_SIZE
;
3183 /* adjust allocation if LPE protects us, and we aren't using SBP */
3184 if (!hw
->tbi_compatibility_on
&&
3185 ((max_frame
== (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) ||
3186 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
)))
3187 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3189 pr_info("%s changing MTU from %d to %d\n",
3190 netdev
->name
, netdev
->mtu
, new_mtu
);
3191 netdev
->mtu
= new_mtu
;
3193 if (netif_running(netdev
))
3196 e1000_reset(adapter
);
3198 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
3204 * e1000_update_stats - Update the board statistics counters
3205 * @adapter: board private structure
3208 void e1000_update_stats(struct e1000_adapter
*adapter
)
3210 struct net_device
*netdev
= adapter
->netdev
;
3211 struct e1000_hw
*hw
= &adapter
->hw
;
3212 struct pci_dev
*pdev
= adapter
->pdev
;
3213 unsigned long flags
;
3216 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3219 * Prevent stats update while adapter is being reset, or if the pci
3220 * connection is down.
3222 if (adapter
->link_speed
== 0)
3224 if (pci_channel_offline(pdev
))
3227 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3229 /* these counters are modified from e1000_tbi_adjust_stats,
3230 * called from the interrupt context, so they must only
3231 * be written while holding adapter->stats_lock
3234 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3235 adapter
->stats
.gprc
+= er32(GPRC
);
3236 adapter
->stats
.gorcl
+= er32(GORCL
);
3237 adapter
->stats
.gorch
+= er32(GORCH
);
3238 adapter
->stats
.bprc
+= er32(BPRC
);
3239 adapter
->stats
.mprc
+= er32(MPRC
);
3240 adapter
->stats
.roc
+= er32(ROC
);
3242 adapter
->stats
.prc64
+= er32(PRC64
);
3243 adapter
->stats
.prc127
+= er32(PRC127
);
3244 adapter
->stats
.prc255
+= er32(PRC255
);
3245 adapter
->stats
.prc511
+= er32(PRC511
);
3246 adapter
->stats
.prc1023
+= er32(PRC1023
);
3247 adapter
->stats
.prc1522
+= er32(PRC1522
);
3249 adapter
->stats
.symerrs
+= er32(SYMERRS
);
3250 adapter
->stats
.mpc
+= er32(MPC
);
3251 adapter
->stats
.scc
+= er32(SCC
);
3252 adapter
->stats
.ecol
+= er32(ECOL
);
3253 adapter
->stats
.mcc
+= er32(MCC
);
3254 adapter
->stats
.latecol
+= er32(LATECOL
);
3255 adapter
->stats
.dc
+= er32(DC
);
3256 adapter
->stats
.sec
+= er32(SEC
);
3257 adapter
->stats
.rlec
+= er32(RLEC
);
3258 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3259 adapter
->stats
.xontxc
+= er32(XONTXC
);
3260 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3261 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3262 adapter
->stats
.fcruc
+= er32(FCRUC
);
3263 adapter
->stats
.gptc
+= er32(GPTC
);
3264 adapter
->stats
.gotcl
+= er32(GOTCL
);
3265 adapter
->stats
.gotch
+= er32(GOTCH
);
3266 adapter
->stats
.rnbc
+= er32(RNBC
);
3267 adapter
->stats
.ruc
+= er32(RUC
);
3268 adapter
->stats
.rfc
+= er32(RFC
);
3269 adapter
->stats
.rjc
+= er32(RJC
);
3270 adapter
->stats
.torl
+= er32(TORL
);
3271 adapter
->stats
.torh
+= er32(TORH
);
3272 adapter
->stats
.totl
+= er32(TOTL
);
3273 adapter
->stats
.toth
+= er32(TOTH
);
3274 adapter
->stats
.tpr
+= er32(TPR
);
3276 adapter
->stats
.ptc64
+= er32(PTC64
);
3277 adapter
->stats
.ptc127
+= er32(PTC127
);
3278 adapter
->stats
.ptc255
+= er32(PTC255
);
3279 adapter
->stats
.ptc511
+= er32(PTC511
);
3280 adapter
->stats
.ptc1023
+= er32(PTC1023
);
3281 adapter
->stats
.ptc1522
+= er32(PTC1522
);
3283 adapter
->stats
.mptc
+= er32(MPTC
);
3284 adapter
->stats
.bptc
+= er32(BPTC
);
3286 /* used for adaptive IFS */
3288 hw
->tx_packet_delta
= er32(TPT
);
3289 adapter
->stats
.tpt
+= hw
->tx_packet_delta
;
3290 hw
->collision_delta
= er32(COLC
);
3291 adapter
->stats
.colc
+= hw
->collision_delta
;
3293 if (hw
->mac_type
>= e1000_82543
) {
3294 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3295 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3296 adapter
->stats
.tncrs
+= er32(TNCRS
);
3297 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3298 adapter
->stats
.tsctc
+= er32(TSCTC
);
3299 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3302 /* Fill out the OS statistics structure */
3303 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3304 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3308 /* RLEC on some newer hardware can be incorrect so build
3309 * our own version based on RUC and ROC */
3310 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3311 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3312 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3313 adapter
->stats
.cexterr
;
3314 adapter
->stats
.rlerrc
= adapter
->stats
.ruc
+ adapter
->stats
.roc
;
3315 netdev
->stats
.rx_length_errors
= adapter
->stats
.rlerrc
;
3316 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3317 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3318 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3321 adapter
->stats
.txerrc
= adapter
->stats
.ecol
+ adapter
->stats
.latecol
;
3322 netdev
->stats
.tx_errors
= adapter
->stats
.txerrc
;
3323 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3324 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3325 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3326 if (hw
->bad_tx_carr_stats_fd
&&
3327 adapter
->link_duplex
== FULL_DUPLEX
) {
3328 netdev
->stats
.tx_carrier_errors
= 0;
3329 adapter
->stats
.tncrs
= 0;
3332 /* Tx Dropped needs to be maintained elsewhere */
3335 if (hw
->media_type
== e1000_media_type_copper
) {
3336 if ((adapter
->link_speed
== SPEED_1000
) &&
3337 (!e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_tmp
))) {
3338 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3339 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3342 if ((hw
->mac_type
<= e1000_82546
) &&
3343 (hw
->phy_type
== e1000_phy_m88
) &&
3344 !e1000_read_phy_reg(hw
, M88E1000_RX_ERR_CNTR
, &phy_tmp
))
3345 adapter
->phy_stats
.receive_errors
+= phy_tmp
;
3348 /* Management Stats */
3349 if (hw
->has_smbus
) {
3350 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3351 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3352 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3355 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
3359 * e1000_intr - Interrupt Handler
3360 * @irq: interrupt number
3361 * @data: pointer to a network interface device structure
3364 static irqreturn_t
e1000_intr(int irq
, void *data
)
3366 struct net_device
*netdev
= data
;
3367 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3368 struct e1000_hw
*hw
= &adapter
->hw
;
3369 u32 icr
= er32(ICR
);
3371 if (unlikely((!icr
) || test_bit(__E1000_DOWN
, &adapter
->flags
)))
3372 return IRQ_NONE
; /* Not our interrupt */
3374 if (unlikely(icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
))) {
3375 hw
->get_link_status
= 1;
3376 /* guard against interrupt when we're going down */
3377 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3378 mod_timer(&adapter
->watchdog_timer
, jiffies
+ 1);
3381 /* disable interrupts, without the synchronize_irq bit */
3383 E1000_WRITE_FLUSH();
3385 if (likely(napi_schedule_prep(&adapter
->napi
))) {
3386 adapter
->total_tx_bytes
= 0;
3387 adapter
->total_tx_packets
= 0;
3388 adapter
->total_rx_bytes
= 0;
3389 adapter
->total_rx_packets
= 0;
3390 __napi_schedule(&adapter
->napi
);
3392 /* this really should not happen! if it does it is basically a
3393 * bug, but not a hard error, so enable ints and continue */
3394 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3395 e1000_irq_enable(adapter
);
3402 * e1000_clean - NAPI Rx polling callback
3403 * @adapter: board private structure
3405 static int e1000_clean(struct napi_struct
*napi
, int budget
)
3407 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
3408 int tx_clean_complete
= 0, work_done
= 0;
3410 tx_clean_complete
= e1000_clean_tx_irq(adapter
, &adapter
->tx_ring
[0]);
3412 adapter
->clean_rx(adapter
, &adapter
->rx_ring
[0], &work_done
, budget
);
3414 if (!tx_clean_complete
)
3417 /* If budget not fully consumed, exit the polling mode */
3418 if (work_done
< budget
) {
3419 if (likely(adapter
->itr_setting
& 3))
3420 e1000_set_itr(adapter
);
3421 napi_complete(napi
);
3422 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3423 e1000_irq_enable(adapter
);
3430 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3431 * @adapter: board private structure
3433 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
3434 struct e1000_tx_ring
*tx_ring
)
3436 struct e1000_hw
*hw
= &adapter
->hw
;
3437 struct net_device
*netdev
= adapter
->netdev
;
3438 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
3439 struct e1000_buffer
*buffer_info
;
3440 unsigned int i
, eop
;
3441 unsigned int count
= 0;
3442 unsigned int total_tx_bytes
=0, total_tx_packets
=0;
3444 i
= tx_ring
->next_to_clean
;
3445 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3446 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3448 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3449 (count
< tx_ring
->count
)) {
3450 bool cleaned
= false;
3451 for ( ; !cleaned
; count
++) {
3452 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3453 buffer_info
= &tx_ring
->buffer_info
[i
];
3454 cleaned
= (i
== eop
);
3457 struct sk_buff
*skb
= buffer_info
->skb
;
3458 unsigned int segs
, bytecount
;
3459 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
3460 /* multiply data chunks by size of headers */
3461 bytecount
= ((segs
- 1) * skb_headlen(skb
)) +
3463 total_tx_packets
+= segs
;
3464 total_tx_bytes
+= bytecount
;
3466 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
3467 tx_desc
->upper
.data
= 0;
3469 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3472 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3473 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3476 tx_ring
->next_to_clean
= i
;
3478 #define TX_WAKE_THRESHOLD 32
3479 if (unlikely(count
&& netif_carrier_ok(netdev
) &&
3480 E1000_DESC_UNUSED(tx_ring
) >= TX_WAKE_THRESHOLD
)) {
3481 /* Make sure that anybody stopping the queue after this
3482 * sees the new next_to_clean.
3486 if (netif_queue_stopped(netdev
) &&
3487 !(test_bit(__E1000_DOWN
, &adapter
->flags
))) {
3488 netif_wake_queue(netdev
);
3489 ++adapter
->restart_queue
;
3493 if (adapter
->detect_tx_hung
) {
3494 /* Detect a transmit hang in hardware, this serializes the
3495 * check with the clearing of time_stamp and movement of i */
3496 adapter
->detect_tx_hung
= false;
3497 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
3498 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+
3499 (adapter
->tx_timeout_factor
* HZ
)) &&
3500 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
3502 /* detected Tx unit hang */
3503 e_err("Detected Tx Unit Hang\n"
3507 " next_to_use <%x>\n"
3508 " next_to_clean <%x>\n"
3509 "buffer_info[next_to_clean]\n"
3510 " time_stamp <%lx>\n"
3511 " next_to_watch <%x>\n"
3513 " next_to_watch.status <%x>\n",
3514 (unsigned long)((tx_ring
- adapter
->tx_ring
) /
3515 sizeof(struct e1000_tx_ring
)),
3516 readl(hw
->hw_addr
+ tx_ring
->tdh
),
3517 readl(hw
->hw_addr
+ tx_ring
->tdt
),
3518 tx_ring
->next_to_use
,
3519 tx_ring
->next_to_clean
,
3520 tx_ring
->buffer_info
[eop
].time_stamp
,
3523 eop_desc
->upper
.fields
.status
);
3524 netif_stop_queue(netdev
);
3527 adapter
->total_tx_bytes
+= total_tx_bytes
;
3528 adapter
->total_tx_packets
+= total_tx_packets
;
3529 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
3530 netdev
->stats
.tx_packets
+= total_tx_packets
;
3531 return (count
< tx_ring
->count
);
3535 * e1000_rx_checksum - Receive Checksum Offload for 82543
3536 * @adapter: board private structure
3537 * @status_err: receive descriptor status and error fields
3538 * @csum: receive descriptor csum field
3539 * @sk_buff: socket buffer with received data
3542 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
3543 u32 csum
, struct sk_buff
*skb
)
3545 struct e1000_hw
*hw
= &adapter
->hw
;
3546 u16 status
= (u16
)status_err
;
3547 u8 errors
= (u8
)(status_err
>> 24);
3548 skb
->ip_summed
= CHECKSUM_NONE
;
3550 /* 82543 or newer only */
3551 if (unlikely(hw
->mac_type
< e1000_82543
)) return;
3552 /* Ignore Checksum bit is set */
3553 if (unlikely(status
& E1000_RXD_STAT_IXSM
)) return;
3554 /* TCP/UDP checksum error bit is set */
3555 if (unlikely(errors
& E1000_RXD_ERR_TCPE
)) {
3556 /* let the stack verify checksum errors */
3557 adapter
->hw_csum_err
++;
3560 /* TCP/UDP Checksum has not been calculated */
3561 if (!(status
& E1000_RXD_STAT_TCPCS
))
3564 /* It must be a TCP or UDP packet with a valid checksum */
3565 if (likely(status
& E1000_RXD_STAT_TCPCS
)) {
3566 /* TCP checksum is good */
3567 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3569 adapter
->hw_csum_good
++;
3573 * e1000_consume_page - helper function
3575 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
3580 skb
->data_len
+= length
;
3581 skb
->truesize
+= length
;
3585 * e1000_receive_skb - helper function to handle rx indications
3586 * @adapter: board private structure
3587 * @status: descriptor status field as written by hardware
3588 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3589 * @skb: pointer to sk_buff to be indicated to stack
3591 static void e1000_receive_skb(struct e1000_adapter
*adapter
, u8 status
,
3592 __le16 vlan
, struct sk_buff
*skb
)
3594 if (unlikely(adapter
->vlgrp
&& (status
& E1000_RXD_STAT_VP
))) {
3595 vlan_hwaccel_receive_skb(skb
, adapter
->vlgrp
,
3597 E1000_RXD_SPC_VLAN_MASK
);
3599 netif_receive_skb(skb
);
3604 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
3605 * @adapter: board private structure
3606 * @rx_ring: ring to clean
3607 * @work_done: amount of napi work completed this call
3608 * @work_to_do: max amount of work allowed for this call to do
3610 * the return value indicates whether actual cleaning was done, there
3611 * is no guarantee that everything was cleaned
3613 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
3614 struct e1000_rx_ring
*rx_ring
,
3615 int *work_done
, int work_to_do
)
3617 struct e1000_hw
*hw
= &adapter
->hw
;
3618 struct net_device
*netdev
= adapter
->netdev
;
3619 struct pci_dev
*pdev
= adapter
->pdev
;
3620 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
3621 struct e1000_buffer
*buffer_info
, *next_buffer
;
3622 unsigned long irq_flags
;
3625 int cleaned_count
= 0;
3626 bool cleaned
= false;
3627 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
3629 i
= rx_ring
->next_to_clean
;
3630 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3631 buffer_info
= &rx_ring
->buffer_info
[i
];
3633 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
3634 struct sk_buff
*skb
;
3637 if (*work_done
>= work_to_do
)
3641 status
= rx_desc
->status
;
3642 skb
= buffer_info
->skb
;
3643 buffer_info
->skb
= NULL
;
3645 if (++i
== rx_ring
->count
) i
= 0;
3646 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
3649 next_buffer
= &rx_ring
->buffer_info
[i
];
3653 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
3654 buffer_info
->length
, DMA_FROM_DEVICE
);
3655 buffer_info
->dma
= 0;
3657 length
= le16_to_cpu(rx_desc
->length
);
3659 /* errors is only valid for DD + EOP descriptors */
3660 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
3661 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
3662 u8 last_byte
= *(skb
->data
+ length
- 1);
3663 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
3665 spin_lock_irqsave(&adapter
->stats_lock
,
3667 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
3669 spin_unlock_irqrestore(&adapter
->stats_lock
,
3673 /* recycle both page and skb */
3674 buffer_info
->skb
= skb
;
3675 /* an error means any chain goes out the window
3677 if (rx_ring
->rx_skb_top
)
3678 dev_kfree_skb(rx_ring
->rx_skb_top
);
3679 rx_ring
->rx_skb_top
= NULL
;
3684 #define rxtop rx_ring->rx_skb_top
3685 if (!(status
& E1000_RXD_STAT_EOP
)) {
3686 /* this descriptor is only the beginning (or middle) */
3688 /* this is the beginning of a chain */
3690 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
3693 /* this is the middle of a chain */
3694 skb_fill_page_desc(rxtop
,
3695 skb_shinfo(rxtop
)->nr_frags
,
3696 buffer_info
->page
, 0, length
);
3697 /* re-use the skb, only consumed the page */
3698 buffer_info
->skb
= skb
;
3700 e1000_consume_page(buffer_info
, rxtop
, length
);
3704 /* end of the chain */
3705 skb_fill_page_desc(rxtop
,
3706 skb_shinfo(rxtop
)->nr_frags
,
3707 buffer_info
->page
, 0, length
);
3708 /* re-use the current skb, we only consumed the
3710 buffer_info
->skb
= skb
;
3713 e1000_consume_page(buffer_info
, skb
, length
);
3715 /* no chain, got EOP, this buf is the packet
3716 * copybreak to save the put_page/alloc_page */
3717 if (length
<= copybreak
&&
3718 skb_tailroom(skb
) >= length
) {
3720 vaddr
= kmap_atomic(buffer_info
->page
,
3721 KM_SKB_DATA_SOFTIRQ
);
3722 memcpy(skb_tail_pointer(skb
), vaddr
, length
);
3723 kunmap_atomic(vaddr
,
3724 KM_SKB_DATA_SOFTIRQ
);
3725 /* re-use the page, so don't erase
3726 * buffer_info->page */
3727 skb_put(skb
, length
);
3729 skb_fill_page_desc(skb
, 0,
3730 buffer_info
->page
, 0,
3732 e1000_consume_page(buffer_info
, skb
,
3738 /* Receive Checksum Offload XXX recompute due to CRC strip? */
3739 e1000_rx_checksum(adapter
,
3741 ((u32
)(rx_desc
->errors
) << 24),
3742 le16_to_cpu(rx_desc
->csum
), skb
);
3744 pskb_trim(skb
, skb
->len
- 4);
3746 /* probably a little skewed due to removing CRC */
3747 total_rx_bytes
+= skb
->len
;
3750 /* eth type trans needs skb->data to point to something */
3751 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
3752 e_err("pskb_may_pull failed.\n");
3757 skb
->protocol
= eth_type_trans(skb
, netdev
);
3759 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
3762 rx_desc
->status
= 0;
3764 /* return some buffers to hardware, one at a time is too slow */
3765 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
3766 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3770 /* use prefetched values */
3772 buffer_info
= next_buffer
;
3774 rx_ring
->next_to_clean
= i
;
3776 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
3778 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3780 adapter
->total_rx_packets
+= total_rx_packets
;
3781 adapter
->total_rx_bytes
+= total_rx_bytes
;
3782 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
3783 netdev
->stats
.rx_packets
+= total_rx_packets
;
3788 * this should improve performance for small packets with large amounts
3789 * of reassembly being done in the stack
3791 static void e1000_check_copybreak(struct net_device
*netdev
,
3792 struct e1000_buffer
*buffer_info
,
3793 u32 length
, struct sk_buff
**skb
)
3795 struct sk_buff
*new_skb
;
3797 if (length
> copybreak
)
3800 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
3804 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
3805 (*skb
)->data
- NET_IP_ALIGN
,
3806 length
+ NET_IP_ALIGN
);
3807 /* save the skb in buffer_info as good */
3808 buffer_info
->skb
= *skb
;
3813 * e1000_clean_rx_irq - Send received data up the network stack; legacy
3814 * @adapter: board private structure
3815 * @rx_ring: ring to clean
3816 * @work_done: amount of napi work completed this call
3817 * @work_to_do: max amount of work allowed for this call to do
3819 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
3820 struct e1000_rx_ring
*rx_ring
,
3821 int *work_done
, int work_to_do
)
3823 struct e1000_hw
*hw
= &adapter
->hw
;
3824 struct net_device
*netdev
= adapter
->netdev
;
3825 struct pci_dev
*pdev
= adapter
->pdev
;
3826 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
3827 struct e1000_buffer
*buffer_info
, *next_buffer
;
3828 unsigned long flags
;
3831 int cleaned_count
= 0;
3832 bool cleaned
= false;
3833 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
3835 i
= rx_ring
->next_to_clean
;
3836 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3837 buffer_info
= &rx_ring
->buffer_info
[i
];
3839 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
3840 struct sk_buff
*skb
;
3843 if (*work_done
>= work_to_do
)
3847 status
= rx_desc
->status
;
3848 skb
= buffer_info
->skb
;
3849 buffer_info
->skb
= NULL
;
3851 prefetch(skb
->data
- NET_IP_ALIGN
);
3853 if (++i
== rx_ring
->count
) i
= 0;
3854 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
3857 next_buffer
= &rx_ring
->buffer_info
[i
];
3861 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
3862 buffer_info
->length
, DMA_FROM_DEVICE
);
3863 buffer_info
->dma
= 0;
3865 length
= le16_to_cpu(rx_desc
->length
);
3866 /* !EOP means multiple descriptors were used to store a single
3867 * packet, if thats the case we need to toss it. In fact, we
3868 * to toss every packet with the EOP bit clear and the next
3869 * frame that _does_ have the EOP bit set, as it is by
3870 * definition only a frame fragment
3872 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
3873 adapter
->discarding
= true;
3875 if (adapter
->discarding
) {
3876 /* All receives must fit into a single buffer */
3877 e_info("Receive packet consumed multiple buffers\n");
3879 buffer_info
->skb
= skb
;
3880 if (status
& E1000_RXD_STAT_EOP
)
3881 adapter
->discarding
= false;
3885 if (unlikely(rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
)) {
3886 u8 last_byte
= *(skb
->data
+ length
- 1);
3887 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
3889 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3890 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
3892 spin_unlock_irqrestore(&adapter
->stats_lock
,
3897 buffer_info
->skb
= skb
;
3902 /* adjust length to remove Ethernet CRC, this must be
3903 * done after the TBI_ACCEPT workaround above */
3906 /* probably a little skewed due to removing CRC */
3907 total_rx_bytes
+= length
;
3910 e1000_check_copybreak(netdev
, buffer_info
, length
, &skb
);
3912 skb_put(skb
, length
);
3914 /* Receive Checksum Offload */
3915 e1000_rx_checksum(adapter
,
3917 ((u32
)(rx_desc
->errors
) << 24),
3918 le16_to_cpu(rx_desc
->csum
), skb
);
3920 skb
->protocol
= eth_type_trans(skb
, netdev
);
3922 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
3925 rx_desc
->status
= 0;
3927 /* return some buffers to hardware, one at a time is too slow */
3928 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
3929 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3933 /* use prefetched values */
3935 buffer_info
= next_buffer
;
3937 rx_ring
->next_to_clean
= i
;
3939 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
3941 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
3943 adapter
->total_rx_packets
+= total_rx_packets
;
3944 adapter
->total_rx_bytes
+= total_rx_bytes
;
3945 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
3946 netdev
->stats
.rx_packets
+= total_rx_packets
;
3951 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
3952 * @adapter: address of board private structure
3953 * @rx_ring: pointer to receive ring structure
3954 * @cleaned_count: number of buffers to allocate this pass
3958 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
3959 struct e1000_rx_ring
*rx_ring
, int cleaned_count
)
3961 struct net_device
*netdev
= adapter
->netdev
;
3962 struct pci_dev
*pdev
= adapter
->pdev
;
3963 struct e1000_rx_desc
*rx_desc
;
3964 struct e1000_buffer
*buffer_info
;
3965 struct sk_buff
*skb
;
3967 unsigned int bufsz
= 256 - 16 /*for skb_reserve */ ;
3969 i
= rx_ring
->next_to_use
;
3970 buffer_info
= &rx_ring
->buffer_info
[i
];
3972 while (cleaned_count
--) {
3973 skb
= buffer_info
->skb
;
3979 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
3980 if (unlikely(!skb
)) {
3981 /* Better luck next round */
3982 adapter
->alloc_rx_buff_failed
++;
3986 /* Fix for errata 23, can't cross 64kB boundary */
3987 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
3988 struct sk_buff
*oldskb
= skb
;
3989 e_err("skb align check failed: %u bytes at %p\n",
3991 /* Try again, without freeing the previous */
3992 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
3993 /* Failed allocation, critical failure */
3995 dev_kfree_skb(oldskb
);
3996 adapter
->alloc_rx_buff_failed
++;
4000 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4003 dev_kfree_skb(oldskb
);
4004 break; /* while (cleaned_count--) */
4007 /* Use new allocation */
4008 dev_kfree_skb(oldskb
);
4010 buffer_info
->skb
= skb
;
4011 buffer_info
->length
= adapter
->rx_buffer_len
;
4013 /* allocate a new page if necessary */
4014 if (!buffer_info
->page
) {
4015 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4016 if (unlikely(!buffer_info
->page
)) {
4017 adapter
->alloc_rx_buff_failed
++;
4022 if (!buffer_info
->dma
) {
4023 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
4024 buffer_info
->page
, 0,
4025 buffer_info
->length
,
4027 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4028 put_page(buffer_info
->page
);
4030 buffer_info
->page
= NULL
;
4031 buffer_info
->skb
= NULL
;
4032 buffer_info
->dma
= 0;
4033 adapter
->alloc_rx_buff_failed
++;
4034 break; /* while !buffer_info->skb */
4038 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4039 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4041 if (unlikely(++i
== rx_ring
->count
))
4043 buffer_info
= &rx_ring
->buffer_info
[i
];
4046 if (likely(rx_ring
->next_to_use
!= i
)) {
4047 rx_ring
->next_to_use
= i
;
4048 if (unlikely(i
-- == 0))
4049 i
= (rx_ring
->count
- 1);
4051 /* Force memory writes to complete before letting h/w
4052 * know there are new descriptors to fetch. (Only
4053 * applicable for weak-ordered memory model archs,
4054 * such as IA-64). */
4056 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->rdt
);
4061 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4062 * @adapter: address of board private structure
4065 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
4066 struct e1000_rx_ring
*rx_ring
,
4069 struct e1000_hw
*hw
= &adapter
->hw
;
4070 struct net_device
*netdev
= adapter
->netdev
;
4071 struct pci_dev
*pdev
= adapter
->pdev
;
4072 struct e1000_rx_desc
*rx_desc
;
4073 struct e1000_buffer
*buffer_info
;
4074 struct sk_buff
*skb
;
4076 unsigned int bufsz
= adapter
->rx_buffer_len
;
4078 i
= rx_ring
->next_to_use
;
4079 buffer_info
= &rx_ring
->buffer_info
[i
];
4081 while (cleaned_count
--) {
4082 skb
= buffer_info
->skb
;
4088 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4089 if (unlikely(!skb
)) {
4090 /* Better luck next round */
4091 adapter
->alloc_rx_buff_failed
++;
4095 /* Fix for errata 23, can't cross 64kB boundary */
4096 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4097 struct sk_buff
*oldskb
= skb
;
4098 e_err("skb align check failed: %u bytes at %p\n",
4100 /* Try again, without freeing the previous */
4101 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4102 /* Failed allocation, critical failure */
4104 dev_kfree_skb(oldskb
);
4105 adapter
->alloc_rx_buff_failed
++;
4109 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4112 dev_kfree_skb(oldskb
);
4113 adapter
->alloc_rx_buff_failed
++;
4114 break; /* while !buffer_info->skb */
4117 /* Use new allocation */
4118 dev_kfree_skb(oldskb
);
4120 buffer_info
->skb
= skb
;
4121 buffer_info
->length
= adapter
->rx_buffer_len
;
4123 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4125 buffer_info
->length
,
4127 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4129 buffer_info
->skb
= NULL
;
4130 buffer_info
->dma
= 0;
4131 adapter
->alloc_rx_buff_failed
++;
4132 break; /* while !buffer_info->skb */
4136 * XXX if it was allocated cleanly it will never map to a
4140 /* Fix for errata 23, can't cross 64kB boundary */
4141 if (!e1000_check_64k_bound(adapter
,
4142 (void *)(unsigned long)buffer_info
->dma
,
4143 adapter
->rx_buffer_len
)) {
4144 e_err("dma align check failed: %u bytes at %p\n",
4145 adapter
->rx_buffer_len
,
4146 (void *)(unsigned long)buffer_info
->dma
);
4148 buffer_info
->skb
= NULL
;
4150 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4151 adapter
->rx_buffer_len
,
4153 buffer_info
->dma
= 0;
4155 adapter
->alloc_rx_buff_failed
++;
4156 break; /* while !buffer_info->skb */
4158 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4159 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4161 if (unlikely(++i
== rx_ring
->count
))
4163 buffer_info
= &rx_ring
->buffer_info
[i
];
4166 if (likely(rx_ring
->next_to_use
!= i
)) {
4167 rx_ring
->next_to_use
= i
;
4168 if (unlikely(i
-- == 0))
4169 i
= (rx_ring
->count
- 1);
4171 /* Force memory writes to complete before letting h/w
4172 * know there are new descriptors to fetch. (Only
4173 * applicable for weak-ordered memory model archs,
4174 * such as IA-64). */
4176 writel(i
, hw
->hw_addr
+ rx_ring
->rdt
);
4181 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4185 static void e1000_smartspeed(struct e1000_adapter
*adapter
)
4187 struct e1000_hw
*hw
= &adapter
->hw
;
4191 if ((hw
->phy_type
!= e1000_phy_igp
) || !hw
->autoneg
||
4192 !(hw
->autoneg_advertised
& ADVERTISE_1000_FULL
))
4195 if (adapter
->smartspeed
== 0) {
4196 /* If Master/Slave config fault is asserted twice,
4197 * we assume back-to-back */
4198 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4199 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4200 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4201 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4202 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4203 if (phy_ctrl
& CR_1000T_MS_ENABLE
) {
4204 phy_ctrl
&= ~CR_1000T_MS_ENABLE
;
4205 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
,
4207 adapter
->smartspeed
++;
4208 if (!e1000_phy_setup_autoneg(hw
) &&
4209 !e1000_read_phy_reg(hw
, PHY_CTRL
,
4211 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4212 MII_CR_RESTART_AUTO_NEG
);
4213 e1000_write_phy_reg(hw
, PHY_CTRL
,
4218 } else if (adapter
->smartspeed
== E1000_SMARTSPEED_DOWNSHIFT
) {
4219 /* If still no link, perhaps using 2/3 pair cable */
4220 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4221 phy_ctrl
|= CR_1000T_MS_ENABLE
;
4222 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
, phy_ctrl
);
4223 if (!e1000_phy_setup_autoneg(hw
) &&
4224 !e1000_read_phy_reg(hw
, PHY_CTRL
, &phy_ctrl
)) {
4225 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4226 MII_CR_RESTART_AUTO_NEG
);
4227 e1000_write_phy_reg(hw
, PHY_CTRL
, phy_ctrl
);
4230 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4231 if (adapter
->smartspeed
++ == E1000_SMARTSPEED_MAX
)
4232 adapter
->smartspeed
= 0;
4242 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4248 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4261 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4264 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4265 struct e1000_hw
*hw
= &adapter
->hw
;
4266 struct mii_ioctl_data
*data
= if_mii(ifr
);
4270 unsigned long flags
;
4272 if (hw
->media_type
!= e1000_media_type_copper
)
4277 data
->phy_id
= hw
->phy_addr
;
4280 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4281 if (e1000_read_phy_reg(hw
, data
->reg_num
& 0x1F,
4283 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4286 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4289 if (data
->reg_num
& ~(0x1F))
4291 mii_reg
= data
->val_in
;
4292 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4293 if (e1000_write_phy_reg(hw
, data
->reg_num
,
4295 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4298 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4299 if (hw
->media_type
== e1000_media_type_copper
) {
4300 switch (data
->reg_num
) {
4302 if (mii_reg
& MII_CR_POWER_DOWN
)
4304 if (mii_reg
& MII_CR_AUTO_NEG_EN
) {
4306 hw
->autoneg_advertised
= 0x2F;
4309 spddplx
= SPEED_1000
;
4310 else if (mii_reg
& 0x2000)
4311 spddplx
= SPEED_100
;
4314 spddplx
+= (mii_reg
& 0x100)
4317 retval
= e1000_set_spd_dplx(adapter
,
4322 if (netif_running(adapter
->netdev
))
4323 e1000_reinit_locked(adapter
);
4325 e1000_reset(adapter
);
4327 case M88E1000_PHY_SPEC_CTRL
:
4328 case M88E1000_EXT_PHY_SPEC_CTRL
:
4329 if (e1000_phy_reset(hw
))
4334 switch (data
->reg_num
) {
4336 if (mii_reg
& MII_CR_POWER_DOWN
)
4338 if (netif_running(adapter
->netdev
))
4339 e1000_reinit_locked(adapter
);
4341 e1000_reset(adapter
);
4349 return E1000_SUCCESS
;
4352 void e1000_pci_set_mwi(struct e1000_hw
*hw
)
4354 struct e1000_adapter
*adapter
= hw
->back
;
4355 int ret_val
= pci_set_mwi(adapter
->pdev
);
4358 e_err("Error in setting MWI\n");
4361 void e1000_pci_clear_mwi(struct e1000_hw
*hw
)
4363 struct e1000_adapter
*adapter
= hw
->back
;
4365 pci_clear_mwi(adapter
->pdev
);
4368 int e1000_pcix_get_mmrbc(struct e1000_hw
*hw
)
4370 struct e1000_adapter
*adapter
= hw
->back
;
4371 return pcix_get_mmrbc(adapter
->pdev
);
4374 void e1000_pcix_set_mmrbc(struct e1000_hw
*hw
, int mmrbc
)
4376 struct e1000_adapter
*adapter
= hw
->back
;
4377 pcix_set_mmrbc(adapter
->pdev
, mmrbc
);
4380 void e1000_io_write(struct e1000_hw
*hw
, unsigned long port
, u32 value
)
4385 static void e1000_vlan_rx_register(struct net_device
*netdev
,
4386 struct vlan_group
*grp
)
4388 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4389 struct e1000_hw
*hw
= &adapter
->hw
;
4392 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4393 e1000_irq_disable(adapter
);
4394 adapter
->vlgrp
= grp
;
4397 /* enable VLAN tag insert/strip */
4399 ctrl
|= E1000_CTRL_VME
;
4402 /* enable VLAN receive filtering */
4404 rctl
&= ~E1000_RCTL_CFIEN
;
4405 if (!(netdev
->flags
& IFF_PROMISC
))
4406 rctl
|= E1000_RCTL_VFE
;
4408 e1000_update_mng_vlan(adapter
);
4410 /* disable VLAN tag insert/strip */
4412 ctrl
&= ~E1000_CTRL_VME
;
4415 /* disable VLAN receive filtering */
4417 rctl
&= ~E1000_RCTL_VFE
;
4420 if (adapter
->mng_vlan_id
!= (u16
)E1000_MNG_VLAN_NONE
) {
4421 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
4422 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
4426 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4427 e1000_irq_enable(adapter
);
4430 static void e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4432 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4433 struct e1000_hw
*hw
= &adapter
->hw
;
4436 if ((hw
->mng_cookie
.status
&
4437 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
4438 (vid
== adapter
->mng_vlan_id
))
4440 /* add VID to filter table */
4441 index
= (vid
>> 5) & 0x7F;
4442 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4443 vfta
|= (1 << (vid
& 0x1F));
4444 e1000_write_vfta(hw
, index
, vfta
);
4447 static void e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4449 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4450 struct e1000_hw
*hw
= &adapter
->hw
;
4453 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4454 e1000_irq_disable(adapter
);
4455 vlan_group_set_device(adapter
->vlgrp
, vid
, NULL
);
4456 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4457 e1000_irq_enable(adapter
);
4459 /* remove VID from filter table */
4460 index
= (vid
>> 5) & 0x7F;
4461 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4462 vfta
&= ~(1 << (vid
& 0x1F));
4463 e1000_write_vfta(hw
, index
, vfta
);
4466 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
4468 e1000_vlan_rx_register(adapter
->netdev
, adapter
->vlgrp
);
4470 if (adapter
->vlgrp
) {
4472 for (vid
= 0; vid
< VLAN_GROUP_ARRAY_LEN
; vid
++) {
4473 if (!vlan_group_get_device(adapter
->vlgrp
, vid
))
4475 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
4480 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u16 spddplx
)
4482 struct e1000_hw
*hw
= &adapter
->hw
;
4486 /* Fiber NICs only allow 1000 gbps Full duplex */
4487 if ((hw
->media_type
== e1000_media_type_fiber
) &&
4488 spddplx
!= (SPEED_1000
+ DUPLEX_FULL
)) {
4489 e_err("Unsupported Speed/Duplex configuration\n");
4494 case SPEED_10
+ DUPLEX_HALF
:
4495 hw
->forced_speed_duplex
= e1000_10_half
;
4497 case SPEED_10
+ DUPLEX_FULL
:
4498 hw
->forced_speed_duplex
= e1000_10_full
;
4500 case SPEED_100
+ DUPLEX_HALF
:
4501 hw
->forced_speed_duplex
= e1000_100_half
;
4503 case SPEED_100
+ DUPLEX_FULL
:
4504 hw
->forced_speed_duplex
= e1000_100_full
;
4506 case SPEED_1000
+ DUPLEX_FULL
:
4508 hw
->autoneg_advertised
= ADVERTISE_1000_FULL
;
4510 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4512 e_err("Unsupported Speed/Duplex configuration\n");
4518 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4520 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4521 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4522 struct e1000_hw
*hw
= &adapter
->hw
;
4523 u32 ctrl
, ctrl_ext
, rctl
, status
;
4524 u32 wufc
= adapter
->wol
;
4529 netif_device_detach(netdev
);
4531 if (netif_running(netdev
)) {
4532 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
4533 e1000_down(adapter
);
4537 retval
= pci_save_state(pdev
);
4542 status
= er32(STATUS
);
4543 if (status
& E1000_STATUS_LU
)
4544 wufc
&= ~E1000_WUFC_LNKC
;
4547 e1000_setup_rctl(adapter
);
4548 e1000_set_rx_mode(netdev
);
4550 /* turn on all-multi mode if wake on multicast is enabled */
4551 if (wufc
& E1000_WUFC_MC
) {
4553 rctl
|= E1000_RCTL_MPE
;
4557 if (hw
->mac_type
>= e1000_82540
) {
4559 /* advertise wake from D3Cold */
4560 #define E1000_CTRL_ADVD3WUC 0x00100000
4561 /* phy power management enable */
4562 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4563 ctrl
|= E1000_CTRL_ADVD3WUC
|
4564 E1000_CTRL_EN_PHY_PWR_MGMT
;
4568 if (hw
->media_type
== e1000_media_type_fiber
||
4569 hw
->media_type
== e1000_media_type_internal_serdes
) {
4570 /* keep the laser running in D3 */
4571 ctrl_ext
= er32(CTRL_EXT
);
4572 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
4573 ew32(CTRL_EXT
, ctrl_ext
);
4576 ew32(WUC
, E1000_WUC_PME_EN
);
4583 e1000_release_manageability(adapter
);
4585 *enable_wake
= !!wufc
;
4587 /* make sure adapter isn't asleep if manageability is enabled */
4588 if (adapter
->en_mng_pt
)
4589 *enable_wake
= true;
4591 if (netif_running(netdev
))
4592 e1000_free_irq(adapter
);
4594 pci_disable_device(pdev
);
4600 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
4605 retval
= __e1000_shutdown(pdev
, &wake
);
4610 pci_prepare_to_sleep(pdev
);
4612 pci_wake_from_d3(pdev
, false);
4613 pci_set_power_state(pdev
, PCI_D3hot
);
4619 static int e1000_resume(struct pci_dev
*pdev
)
4621 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4622 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4623 struct e1000_hw
*hw
= &adapter
->hw
;
4626 pci_set_power_state(pdev
, PCI_D0
);
4627 pci_restore_state(pdev
);
4628 pci_save_state(pdev
);
4630 if (adapter
->need_ioport
)
4631 err
= pci_enable_device(pdev
);
4633 err
= pci_enable_device_mem(pdev
);
4635 pr_err("Cannot enable PCI device from suspend\n");
4638 pci_set_master(pdev
);
4640 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4641 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4643 if (netif_running(netdev
)) {
4644 err
= e1000_request_irq(adapter
);
4649 e1000_power_up_phy(adapter
);
4650 e1000_reset(adapter
);
4653 e1000_init_manageability(adapter
);
4655 if (netif_running(netdev
))
4658 netif_device_attach(netdev
);
4664 static void e1000_shutdown(struct pci_dev
*pdev
)
4668 __e1000_shutdown(pdev
, &wake
);
4670 if (system_state
== SYSTEM_POWER_OFF
) {
4671 pci_wake_from_d3(pdev
, wake
);
4672 pci_set_power_state(pdev
, PCI_D3hot
);
4676 #ifdef CONFIG_NET_POLL_CONTROLLER
4678 * Polling 'interrupt' - used by things like netconsole to send skbs
4679 * without having to re-enable interrupts. It's not called while
4680 * the interrupt routine is executing.
4682 static void e1000_netpoll(struct net_device
*netdev
)
4684 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4686 disable_irq(adapter
->pdev
->irq
);
4687 e1000_intr(adapter
->pdev
->irq
, netdev
);
4688 enable_irq(adapter
->pdev
->irq
);
4693 * e1000_io_error_detected - called when PCI error is detected
4694 * @pdev: Pointer to PCI device
4695 * @state: The current pci connection state
4697 * This function is called after a PCI bus error affecting
4698 * this device has been detected.
4700 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
4701 pci_channel_state_t state
)
4703 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4704 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4706 netif_device_detach(netdev
);
4708 if (state
== pci_channel_io_perm_failure
)
4709 return PCI_ERS_RESULT_DISCONNECT
;
4711 if (netif_running(netdev
))
4712 e1000_down(adapter
);
4713 pci_disable_device(pdev
);
4715 /* Request a slot slot reset. */
4716 return PCI_ERS_RESULT_NEED_RESET
;
4720 * e1000_io_slot_reset - called after the pci bus has been reset.
4721 * @pdev: Pointer to PCI device
4723 * Restart the card from scratch, as if from a cold-boot. Implementation
4724 * resembles the first-half of the e1000_resume routine.
4726 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
4728 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4729 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4730 struct e1000_hw
*hw
= &adapter
->hw
;
4733 if (adapter
->need_ioport
)
4734 err
= pci_enable_device(pdev
);
4736 err
= pci_enable_device_mem(pdev
);
4738 pr_err("Cannot re-enable PCI device after reset.\n");
4739 return PCI_ERS_RESULT_DISCONNECT
;
4741 pci_set_master(pdev
);
4743 pci_enable_wake(pdev
, PCI_D3hot
, 0);
4744 pci_enable_wake(pdev
, PCI_D3cold
, 0);
4746 e1000_reset(adapter
);
4749 return PCI_ERS_RESULT_RECOVERED
;
4753 * e1000_io_resume - called when traffic can start flowing again.
4754 * @pdev: Pointer to PCI device
4756 * This callback is called when the error recovery driver tells us that
4757 * its OK to resume normal operation. Implementation resembles the
4758 * second-half of the e1000_resume routine.
4760 static void e1000_io_resume(struct pci_dev
*pdev
)
4762 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4763 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4765 e1000_init_manageability(adapter
);
4767 if (netif_running(netdev
)) {
4768 if (e1000_up(adapter
)) {
4769 pr_info("can't bring device back up after reset\n");
4774 netif_device_attach(netdev
);