1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *******************************************************************************/
30 #include <net/ip6_checksum.h>
32 #include <linux/prefetch.h>
33 #include <linux/bitops.h>
34 #include <linux/if_vlan.h>
36 char e1000_driver_name
[] = "e1000";
37 static char e1000_driver_string
[] = "Intel(R) PRO/1000 Network Driver";
38 #define DRV_VERSION "7.3.21-k8-NAPI"
39 const char e1000_driver_version
[] = DRV_VERSION
;
40 static const char e1000_copyright
[] = "Copyright (c) 1999-2006 Intel Corporation.";
42 /* e1000_pci_tbl - PCI Device ID Table
44 * Last entry must be all 0s
47 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
49 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl
) = {
50 INTEL_E1000_ETHERNET_DEVICE(0x1000),
51 INTEL_E1000_ETHERNET_DEVICE(0x1001),
52 INTEL_E1000_ETHERNET_DEVICE(0x1004),
53 INTEL_E1000_ETHERNET_DEVICE(0x1008),
54 INTEL_E1000_ETHERNET_DEVICE(0x1009),
55 INTEL_E1000_ETHERNET_DEVICE(0x100C),
56 INTEL_E1000_ETHERNET_DEVICE(0x100D),
57 INTEL_E1000_ETHERNET_DEVICE(0x100E),
58 INTEL_E1000_ETHERNET_DEVICE(0x100F),
59 INTEL_E1000_ETHERNET_DEVICE(0x1010),
60 INTEL_E1000_ETHERNET_DEVICE(0x1011),
61 INTEL_E1000_ETHERNET_DEVICE(0x1012),
62 INTEL_E1000_ETHERNET_DEVICE(0x1013),
63 INTEL_E1000_ETHERNET_DEVICE(0x1014),
64 INTEL_E1000_ETHERNET_DEVICE(0x1015),
65 INTEL_E1000_ETHERNET_DEVICE(0x1016),
66 INTEL_E1000_ETHERNET_DEVICE(0x1017),
67 INTEL_E1000_ETHERNET_DEVICE(0x1018),
68 INTEL_E1000_ETHERNET_DEVICE(0x1019),
69 INTEL_E1000_ETHERNET_DEVICE(0x101A),
70 INTEL_E1000_ETHERNET_DEVICE(0x101D),
71 INTEL_E1000_ETHERNET_DEVICE(0x101E),
72 INTEL_E1000_ETHERNET_DEVICE(0x1026),
73 INTEL_E1000_ETHERNET_DEVICE(0x1027),
74 INTEL_E1000_ETHERNET_DEVICE(0x1028),
75 INTEL_E1000_ETHERNET_DEVICE(0x1075),
76 INTEL_E1000_ETHERNET_DEVICE(0x1076),
77 INTEL_E1000_ETHERNET_DEVICE(0x1077),
78 INTEL_E1000_ETHERNET_DEVICE(0x1078),
79 INTEL_E1000_ETHERNET_DEVICE(0x1079),
80 INTEL_E1000_ETHERNET_DEVICE(0x107A),
81 INTEL_E1000_ETHERNET_DEVICE(0x107B),
82 INTEL_E1000_ETHERNET_DEVICE(0x107C),
83 INTEL_E1000_ETHERNET_DEVICE(0x108A),
84 INTEL_E1000_ETHERNET_DEVICE(0x1099),
85 INTEL_E1000_ETHERNET_DEVICE(0x10B5),
86 INTEL_E1000_ETHERNET_DEVICE(0x2E6E),
87 /* required last entry */
91 MODULE_DEVICE_TABLE(pci
, e1000_pci_tbl
);
93 int e1000_up(struct e1000_adapter
*adapter
);
94 void e1000_down(struct e1000_adapter
*adapter
);
95 void e1000_reinit_locked(struct e1000_adapter
*adapter
);
96 void e1000_reset(struct e1000_adapter
*adapter
);
97 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
);
98 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
);
99 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
);
100 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
);
101 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
102 struct e1000_tx_ring
*txdr
);
103 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
104 struct e1000_rx_ring
*rxdr
);
105 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
106 struct e1000_tx_ring
*tx_ring
);
107 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
108 struct e1000_rx_ring
*rx_ring
);
109 void e1000_update_stats(struct e1000_adapter
*adapter
);
111 static int e1000_init_module(void);
112 static void e1000_exit_module(void);
113 static int e1000_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
114 static void e1000_remove(struct pci_dev
*pdev
);
115 static int e1000_alloc_queues(struct e1000_adapter
*adapter
);
116 static int e1000_sw_init(struct e1000_adapter
*adapter
);
117 static int e1000_open(struct net_device
*netdev
);
118 static int e1000_close(struct net_device
*netdev
);
119 static void e1000_configure_tx(struct e1000_adapter
*adapter
);
120 static void e1000_configure_rx(struct e1000_adapter
*adapter
);
121 static void e1000_setup_rctl(struct e1000_adapter
*adapter
);
122 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
);
123 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
);
124 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
125 struct e1000_tx_ring
*tx_ring
);
126 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
127 struct e1000_rx_ring
*rx_ring
);
128 static void e1000_set_rx_mode(struct net_device
*netdev
);
129 static void e1000_update_phy_info_task(struct work_struct
*work
);
130 static void e1000_watchdog(struct work_struct
*work
);
131 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
);
132 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
133 struct net_device
*netdev
);
134 static struct net_device_stats
* e1000_get_stats(struct net_device
*netdev
);
135 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
);
136 static int e1000_set_mac(struct net_device
*netdev
, void *p
);
137 static irqreturn_t
e1000_intr(int irq
, void *data
);
138 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
139 struct e1000_tx_ring
*tx_ring
);
140 static int e1000_clean(struct napi_struct
*napi
, int budget
);
141 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
142 struct e1000_rx_ring
*rx_ring
,
143 int *work_done
, int work_to_do
);
144 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
145 struct e1000_rx_ring
*rx_ring
,
146 int *work_done
, int work_to_do
);
147 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
148 struct e1000_rx_ring
*rx_ring
,
150 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
151 struct e1000_rx_ring
*rx_ring
,
153 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
);
154 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
156 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
);
157 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
);
158 static void e1000_tx_timeout(struct net_device
*dev
);
159 static void e1000_reset_task(struct work_struct
*work
);
160 static void e1000_smartspeed(struct e1000_adapter
*adapter
);
161 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
162 struct sk_buff
*skb
);
164 static bool e1000_vlan_used(struct e1000_adapter
*adapter
);
165 static void e1000_vlan_mode(struct net_device
*netdev
,
166 netdev_features_t features
);
167 static void e1000_vlan_filter_on_off(struct e1000_adapter
*adapter
,
169 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
);
170 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
);
171 static void e1000_restore_vlan(struct e1000_adapter
*adapter
);
174 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
);
175 static int e1000_resume(struct pci_dev
*pdev
);
177 static void e1000_shutdown(struct pci_dev
*pdev
);
179 #ifdef CONFIG_NET_POLL_CONTROLLER
180 /* for netdump / net console */
181 static void e1000_netpoll (struct net_device
*netdev
);
184 #define COPYBREAK_DEFAULT 256
185 static unsigned int copybreak __read_mostly
= COPYBREAK_DEFAULT
;
186 module_param(copybreak
, uint
, 0644);
187 MODULE_PARM_DESC(copybreak
,
188 "Maximum size of packet that is copied to a new buffer on receive");
190 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
191 pci_channel_state_t state
);
192 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
);
193 static void e1000_io_resume(struct pci_dev
*pdev
);
195 static const struct pci_error_handlers e1000_err_handler
= {
196 .error_detected
= e1000_io_error_detected
,
197 .slot_reset
= e1000_io_slot_reset
,
198 .resume
= e1000_io_resume
,
201 static struct pci_driver e1000_driver
= {
202 .name
= e1000_driver_name
,
203 .id_table
= e1000_pci_tbl
,
204 .probe
= e1000_probe
,
205 .remove
= e1000_remove
,
207 /* Power Management Hooks */
208 .suspend
= e1000_suspend
,
209 .resume
= e1000_resume
,
211 .shutdown
= e1000_shutdown
,
212 .err_handler
= &e1000_err_handler
215 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
216 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
217 MODULE_LICENSE("GPL");
218 MODULE_VERSION(DRV_VERSION
);
220 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
221 static int debug
= -1;
222 module_param(debug
, int, 0);
223 MODULE_PARM_DESC(debug
, "Debug level (0=none,...,16=all)");
226 * e1000_get_hw_dev - return device
227 * used by hardware layer to print debugging information
230 struct net_device
*e1000_get_hw_dev(struct e1000_hw
*hw
)
232 struct e1000_adapter
*adapter
= hw
->back
;
233 return adapter
->netdev
;
237 * e1000_init_module - Driver Registration Routine
239 * e1000_init_module is the first routine called when the driver is
240 * loaded. All it does is register with the PCI subsystem.
242 static int __init
e1000_init_module(void)
245 pr_info("%s - version %s\n", e1000_driver_string
, e1000_driver_version
);
247 pr_info("%s\n", e1000_copyright
);
249 ret
= pci_register_driver(&e1000_driver
);
250 if (copybreak
!= COPYBREAK_DEFAULT
) {
252 pr_info("copybreak disabled\n");
254 pr_info("copybreak enabled for "
255 "packets <= %u bytes\n", copybreak
);
260 module_init(e1000_init_module
);
263 * e1000_exit_module - Driver Exit Cleanup Routine
265 * e1000_exit_module is called just before the driver is removed
268 static void __exit
e1000_exit_module(void)
270 pci_unregister_driver(&e1000_driver
);
273 module_exit(e1000_exit_module
);
275 static int e1000_request_irq(struct e1000_adapter
*adapter
)
277 struct net_device
*netdev
= adapter
->netdev
;
278 irq_handler_t handler
= e1000_intr
;
279 int irq_flags
= IRQF_SHARED
;
282 err
= request_irq(adapter
->pdev
->irq
, handler
, irq_flags
, netdev
->name
,
285 e_err(probe
, "Unable to allocate interrupt Error: %d\n", err
);
291 static void e1000_free_irq(struct e1000_adapter
*adapter
)
293 struct net_device
*netdev
= adapter
->netdev
;
295 free_irq(adapter
->pdev
->irq
, netdev
);
299 * e1000_irq_disable - Mask off interrupt generation on the NIC
300 * @adapter: board private structure
302 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
304 struct e1000_hw
*hw
= &adapter
->hw
;
308 synchronize_irq(adapter
->pdev
->irq
);
312 * e1000_irq_enable - Enable default interrupt generation settings
313 * @adapter: board private structure
315 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
317 struct e1000_hw
*hw
= &adapter
->hw
;
319 ew32(IMS
, IMS_ENABLE_MASK
);
323 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
325 struct e1000_hw
*hw
= &adapter
->hw
;
326 struct net_device
*netdev
= adapter
->netdev
;
327 u16 vid
= hw
->mng_cookie
.vlan_id
;
328 u16 old_vid
= adapter
->mng_vlan_id
;
330 if (!e1000_vlan_used(adapter
))
333 if (!test_bit(vid
, adapter
->active_vlans
)) {
334 if (hw
->mng_cookie
.status
&
335 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) {
336 e1000_vlan_rx_add_vid(netdev
, vid
);
337 adapter
->mng_vlan_id
= vid
;
339 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
341 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
343 !test_bit(old_vid
, adapter
->active_vlans
))
344 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
346 adapter
->mng_vlan_id
= vid
;
350 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
352 struct e1000_hw
*hw
= &adapter
->hw
;
354 if (adapter
->en_mng_pt
) {
355 u32 manc
= er32(MANC
);
357 /* disable hardware interception of ARP */
358 manc
&= ~(E1000_MANC_ARP_EN
);
364 static void e1000_release_manageability(struct e1000_adapter
*adapter
)
366 struct e1000_hw
*hw
= &adapter
->hw
;
368 if (adapter
->en_mng_pt
) {
369 u32 manc
= er32(MANC
);
371 /* re-enable hardware interception of ARP */
372 manc
|= E1000_MANC_ARP_EN
;
379 * e1000_configure - configure the hardware for RX and TX
380 * @adapter = private board structure
382 static void e1000_configure(struct e1000_adapter
*adapter
)
384 struct net_device
*netdev
= adapter
->netdev
;
387 e1000_set_rx_mode(netdev
);
389 e1000_restore_vlan(adapter
);
390 e1000_init_manageability(adapter
);
392 e1000_configure_tx(adapter
);
393 e1000_setup_rctl(adapter
);
394 e1000_configure_rx(adapter
);
395 /* call E1000_DESC_UNUSED which always leaves
396 * at least 1 descriptor unused to make sure
397 * next_to_use != next_to_clean
399 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
400 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[i
];
401 adapter
->alloc_rx_buf(adapter
, ring
,
402 E1000_DESC_UNUSED(ring
));
406 int e1000_up(struct e1000_adapter
*adapter
)
408 struct e1000_hw
*hw
= &adapter
->hw
;
410 /* hardware has been reset, we need to reload some things */
411 e1000_configure(adapter
);
413 clear_bit(__E1000_DOWN
, &adapter
->flags
);
415 napi_enable(&adapter
->napi
);
417 e1000_irq_enable(adapter
);
419 netif_wake_queue(adapter
->netdev
);
421 /* fire a link change interrupt to start the watchdog */
422 ew32(ICS
, E1000_ICS_LSC
);
427 * e1000_power_up_phy - restore link in case the phy was powered down
428 * @adapter: address of board private structure
430 * The phy may be powered down to save power and turn off link when the
431 * driver is unloaded and wake on lan is not enabled (among others)
432 * *** this routine MUST be followed by a call to e1000_reset ***
434 void e1000_power_up_phy(struct e1000_adapter
*adapter
)
436 struct e1000_hw
*hw
= &adapter
->hw
;
439 /* Just clear the power down bit to wake the phy back up */
440 if (hw
->media_type
== e1000_media_type_copper
) {
441 /* according to the manual, the phy will retain its
442 * settings across a power-down/up cycle
444 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
445 mii_reg
&= ~MII_CR_POWER_DOWN
;
446 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
450 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
452 struct e1000_hw
*hw
= &adapter
->hw
;
454 /* Power down the PHY so no link is implied when interface is down *
455 * The PHY cannot be powered down if any of the following is true *
458 * (c) SoL/IDER session is active
460 if (!adapter
->wol
&& hw
->mac_type
>= e1000_82540
&&
461 hw
->media_type
== e1000_media_type_copper
) {
464 switch (hw
->mac_type
) {
467 case e1000_82545_rev_3
:
470 case e1000_82546_rev_3
:
472 case e1000_82541_rev_2
:
474 case e1000_82547_rev_2
:
475 if (er32(MANC
) & E1000_MANC_SMBUS_EN
)
481 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
482 mii_reg
|= MII_CR_POWER_DOWN
;
483 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
490 static void e1000_down_and_stop(struct e1000_adapter
*adapter
)
492 set_bit(__E1000_DOWN
, &adapter
->flags
);
494 /* Only kill reset task if adapter is not resetting */
495 if (!test_bit(__E1000_RESETTING
, &adapter
->flags
))
496 cancel_work_sync(&adapter
->reset_task
);
498 cancel_delayed_work_sync(&adapter
->watchdog_task
);
499 cancel_delayed_work_sync(&adapter
->phy_info_task
);
500 cancel_delayed_work_sync(&adapter
->fifo_stall_task
);
503 void e1000_down(struct e1000_adapter
*adapter
)
505 struct e1000_hw
*hw
= &adapter
->hw
;
506 struct net_device
*netdev
= adapter
->netdev
;
510 /* disable receives in the hardware */
512 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
513 /* flush and sleep below */
515 netif_tx_disable(netdev
);
517 /* disable transmits in the hardware */
519 tctl
&= ~E1000_TCTL_EN
;
521 /* flush both disables and wait for them to finish */
525 napi_disable(&adapter
->napi
);
527 e1000_irq_disable(adapter
);
529 /* Setting DOWN must be after irq_disable to prevent
530 * a screaming interrupt. Setting DOWN also prevents
531 * tasks from rescheduling.
533 e1000_down_and_stop(adapter
);
535 adapter
->link_speed
= 0;
536 adapter
->link_duplex
= 0;
537 netif_carrier_off(netdev
);
539 e1000_reset(adapter
);
540 e1000_clean_all_tx_rings(adapter
);
541 e1000_clean_all_rx_rings(adapter
);
544 static void e1000_reinit_safe(struct e1000_adapter
*adapter
)
546 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
548 mutex_lock(&adapter
->mutex
);
551 mutex_unlock(&adapter
->mutex
);
552 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
555 void e1000_reinit_locked(struct e1000_adapter
*adapter
)
557 /* if rtnl_lock is not held the call path is bogus */
559 WARN_ON(in_interrupt());
560 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
564 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
567 void e1000_reset(struct e1000_adapter
*adapter
)
569 struct e1000_hw
*hw
= &adapter
->hw
;
570 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
571 bool legacy_pba_adjust
= false;
574 /* Repartition Pba for greater than 9k mtu
575 * To take effect CTRL.RST is required.
578 switch (hw
->mac_type
) {
579 case e1000_82542_rev2_0
:
580 case e1000_82542_rev2_1
:
585 case e1000_82541_rev_2
:
586 legacy_pba_adjust
= true;
590 case e1000_82545_rev_3
:
593 case e1000_82546_rev_3
:
597 case e1000_82547_rev_2
:
598 legacy_pba_adjust
= true;
601 case e1000_undefined
:
606 if (legacy_pba_adjust
) {
607 if (hw
->max_frame_size
> E1000_RXBUFFER_8192
)
608 pba
-= 8; /* allocate more FIFO for Tx */
610 if (hw
->mac_type
== e1000_82547
) {
611 adapter
->tx_fifo_head
= 0;
612 adapter
->tx_head_addr
= pba
<< E1000_TX_HEAD_ADDR_SHIFT
;
613 adapter
->tx_fifo_size
=
614 (E1000_PBA_40K
- pba
) << E1000_PBA_BYTES_SHIFT
;
615 atomic_set(&adapter
->tx_fifo_stall
, 0);
617 } else if (hw
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
618 /* adjust PBA for jumbo frames */
621 /* To maintain wire speed transmits, the Tx FIFO should be
622 * large enough to accommodate two full transmit packets,
623 * rounded up to the next 1KB and expressed in KB. Likewise,
624 * the Rx FIFO should be large enough to accommodate at least
625 * one full receive packet and is similarly rounded up and
629 /* upper 16 bits has Tx packet buffer allocation size in KB */
630 tx_space
= pba
>> 16;
631 /* lower 16 bits has Rx packet buffer allocation size in KB */
633 /* the Tx fifo also stores 16 bytes of information about the Tx
634 * but don't include ethernet FCS because hardware appends it
636 min_tx_space
= (hw
->max_frame_size
+
637 sizeof(struct e1000_tx_desc
) -
639 min_tx_space
= ALIGN(min_tx_space
, 1024);
641 /* software strips receive CRC, so leave room for it */
642 min_rx_space
= hw
->max_frame_size
;
643 min_rx_space
= ALIGN(min_rx_space
, 1024);
646 /* If current Tx allocation is less than the min Tx FIFO size,
647 * and the min Tx FIFO size is less than the current Rx FIFO
648 * allocation, take space away from current Rx allocation
650 if (tx_space
< min_tx_space
&&
651 ((min_tx_space
- tx_space
) < pba
)) {
652 pba
= pba
- (min_tx_space
- tx_space
);
654 /* PCI/PCIx hardware has PBA alignment constraints */
655 switch (hw
->mac_type
) {
656 case e1000_82545
... e1000_82546_rev_3
:
657 pba
&= ~(E1000_PBA_8K
- 1);
663 /* if short on Rx space, Rx wins and must trump Tx
664 * adjustment or use Early Receive if available
666 if (pba
< min_rx_space
)
673 /* flow control settings:
674 * The high water mark must be low enough to fit one full frame
675 * (or the size used for early receive) above it in the Rx FIFO.
676 * Set it to the lower of:
677 * - 90% of the Rx FIFO size, and
678 * - the full Rx FIFO size minus the early receive size (for parts
679 * with ERT support assuming ERT set to E1000_ERT_2048), or
680 * - the full Rx FIFO size minus one full frame
682 hwm
= min(((pba
<< 10) * 9 / 10),
683 ((pba
<< 10) - hw
->max_frame_size
));
685 hw
->fc_high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
686 hw
->fc_low_water
= hw
->fc_high_water
- 8;
687 hw
->fc_pause_time
= E1000_FC_PAUSE_TIME
;
689 hw
->fc
= hw
->original_fc
;
691 /* Allow time for pending master requests to run */
693 if (hw
->mac_type
>= e1000_82544
)
696 if (e1000_init_hw(hw
))
697 e_dev_err("Hardware Error\n");
698 e1000_update_mng_vlan(adapter
);
700 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
701 if (hw
->mac_type
>= e1000_82544
&&
703 hw
->autoneg_advertised
== ADVERTISE_1000_FULL
) {
704 u32 ctrl
= er32(CTRL
);
705 /* clear phy power management bit if we are in gig only mode,
706 * which if enabled will attempt negotiation to 100Mb, which
707 * can cause a loss of link at power off or driver unload
709 ctrl
&= ~E1000_CTRL_SWDPIN3
;
713 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
714 ew32(VET
, ETHERNET_IEEE_VLAN_TYPE
);
716 e1000_reset_adaptive(hw
);
717 e1000_phy_get_info(hw
, &adapter
->phy_info
);
719 e1000_release_manageability(adapter
);
722 /* Dump the eeprom for users having checksum issues */
723 static void e1000_dump_eeprom(struct e1000_adapter
*adapter
)
725 struct net_device
*netdev
= adapter
->netdev
;
726 struct ethtool_eeprom eeprom
;
727 const struct ethtool_ops
*ops
= netdev
->ethtool_ops
;
730 u16 csum_old
, csum_new
= 0;
732 eeprom
.len
= ops
->get_eeprom_len(netdev
);
735 data
= kmalloc(eeprom
.len
, GFP_KERNEL
);
739 ops
->get_eeprom(netdev
, &eeprom
, data
);
741 csum_old
= (data
[EEPROM_CHECKSUM_REG
* 2]) +
742 (data
[EEPROM_CHECKSUM_REG
* 2 + 1] << 8);
743 for (i
= 0; i
< EEPROM_CHECKSUM_REG
* 2; i
+= 2)
744 csum_new
+= data
[i
] + (data
[i
+ 1] << 8);
745 csum_new
= EEPROM_SUM
- csum_new
;
747 pr_err("/*********************/\n");
748 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old
);
749 pr_err("Calculated : 0x%04x\n", csum_new
);
751 pr_err("Offset Values\n");
752 pr_err("======== ======\n");
753 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 16, 1, data
, 128, 0);
755 pr_err("Include this output when contacting your support provider.\n");
756 pr_err("This is not a software error! Something bad happened to\n");
757 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
758 pr_err("result in further problems, possibly loss of data,\n");
759 pr_err("corruption or system hangs!\n");
760 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
761 pr_err("which is invalid and requires you to set the proper MAC\n");
762 pr_err("address manually before continuing to enable this network\n");
763 pr_err("device. Please inspect the EEPROM dump and report the\n");
764 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
765 pr_err("/*********************/\n");
771 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
772 * @pdev: PCI device information struct
774 * Return true if an adapter needs ioport resources
776 static int e1000_is_need_ioport(struct pci_dev
*pdev
)
778 switch (pdev
->device
) {
779 case E1000_DEV_ID_82540EM
:
780 case E1000_DEV_ID_82540EM_LOM
:
781 case E1000_DEV_ID_82540EP
:
782 case E1000_DEV_ID_82540EP_LOM
:
783 case E1000_DEV_ID_82540EP_LP
:
784 case E1000_DEV_ID_82541EI
:
785 case E1000_DEV_ID_82541EI_MOBILE
:
786 case E1000_DEV_ID_82541ER
:
787 case E1000_DEV_ID_82541ER_LOM
:
788 case E1000_DEV_ID_82541GI
:
789 case E1000_DEV_ID_82541GI_LF
:
790 case E1000_DEV_ID_82541GI_MOBILE
:
791 case E1000_DEV_ID_82544EI_COPPER
:
792 case E1000_DEV_ID_82544EI_FIBER
:
793 case E1000_DEV_ID_82544GC_COPPER
:
794 case E1000_DEV_ID_82544GC_LOM
:
795 case E1000_DEV_ID_82545EM_COPPER
:
796 case E1000_DEV_ID_82545EM_FIBER
:
797 case E1000_DEV_ID_82546EB_COPPER
:
798 case E1000_DEV_ID_82546EB_FIBER
:
799 case E1000_DEV_ID_82546EB_QUAD_COPPER
:
806 static netdev_features_t
e1000_fix_features(struct net_device
*netdev
,
807 netdev_features_t features
)
809 /* Since there is no support for separate Rx/Tx vlan accel
810 * enable/disable make sure Tx flag is always in same state as Rx.
812 if (features
& NETIF_F_HW_VLAN_RX
)
813 features
|= NETIF_F_HW_VLAN_TX
;
815 features
&= ~NETIF_F_HW_VLAN_TX
;
820 static int e1000_set_features(struct net_device
*netdev
,
821 netdev_features_t features
)
823 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
824 netdev_features_t changed
= features
^ netdev
->features
;
826 if (changed
& NETIF_F_HW_VLAN_RX
)
827 e1000_vlan_mode(netdev
, features
);
829 if (!(changed
& (NETIF_F_RXCSUM
| NETIF_F_RXALL
)))
832 netdev
->features
= features
;
833 adapter
->rx_csum
= !!(features
& NETIF_F_RXCSUM
);
835 if (netif_running(netdev
))
836 e1000_reinit_locked(adapter
);
838 e1000_reset(adapter
);
843 static const struct net_device_ops e1000_netdev_ops
= {
844 .ndo_open
= e1000_open
,
845 .ndo_stop
= e1000_close
,
846 .ndo_start_xmit
= e1000_xmit_frame
,
847 .ndo_get_stats
= e1000_get_stats
,
848 .ndo_set_rx_mode
= e1000_set_rx_mode
,
849 .ndo_set_mac_address
= e1000_set_mac
,
850 .ndo_tx_timeout
= e1000_tx_timeout
,
851 .ndo_change_mtu
= e1000_change_mtu
,
852 .ndo_do_ioctl
= e1000_ioctl
,
853 .ndo_validate_addr
= eth_validate_addr
,
854 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
855 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
856 #ifdef CONFIG_NET_POLL_CONTROLLER
857 .ndo_poll_controller
= e1000_netpoll
,
859 .ndo_fix_features
= e1000_fix_features
,
860 .ndo_set_features
= e1000_set_features
,
864 * e1000_init_hw_struct - initialize members of hw struct
865 * @adapter: board private struct
866 * @hw: structure used by e1000_hw.c
868 * Factors out initialization of the e1000_hw struct to its own function
869 * that can be called very early at init (just after struct allocation).
870 * Fields are initialized based on PCI device information and
871 * OS network device settings (MTU size).
872 * Returns negative error codes if MAC type setup fails.
874 static int e1000_init_hw_struct(struct e1000_adapter
*adapter
,
877 struct pci_dev
*pdev
= adapter
->pdev
;
879 /* PCI config space info */
880 hw
->vendor_id
= pdev
->vendor
;
881 hw
->device_id
= pdev
->device
;
882 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
883 hw
->subsystem_id
= pdev
->subsystem_device
;
884 hw
->revision_id
= pdev
->revision
;
886 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->pci_cmd_word
);
888 hw
->max_frame_size
= adapter
->netdev
->mtu
+
889 ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
890 hw
->min_frame_size
= MINIMUM_ETHERNET_FRAME_SIZE
;
892 /* identify the MAC */
893 if (e1000_set_mac_type(hw
)) {
894 e_err(probe
, "Unknown MAC Type\n");
898 switch (hw
->mac_type
) {
903 case e1000_82541_rev_2
:
904 case e1000_82547_rev_2
:
905 hw
->phy_init_script
= 1;
909 e1000_set_media_type(hw
);
910 e1000_get_bus_info(hw
);
912 hw
->wait_autoneg_complete
= false;
913 hw
->tbi_compatibility_en
= true;
914 hw
->adaptive_ifs
= true;
918 if (hw
->media_type
== e1000_media_type_copper
) {
919 hw
->mdix
= AUTO_ALL_MODES
;
920 hw
->disable_polarity_correction
= false;
921 hw
->master_slave
= E1000_MASTER_SLAVE
;
928 * e1000_probe - Device Initialization Routine
929 * @pdev: PCI device information struct
930 * @ent: entry in e1000_pci_tbl
932 * Returns 0 on success, negative on failure
934 * e1000_probe initializes an adapter identified by a pci_dev structure.
935 * The OS initialization, configuring of the adapter private structure,
936 * and a hardware reset occur.
938 static int e1000_probe(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
940 struct net_device
*netdev
;
941 struct e1000_adapter
*adapter
;
944 static int cards_found
= 0;
945 static int global_quad_port_a
= 0; /* global ksp3 port a indication */
946 int i
, err
, pci_using_dac
;
949 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
950 int bars
, need_ioport
;
952 /* do not allocate ioport bars when not needed */
953 need_ioport
= e1000_is_need_ioport(pdev
);
955 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
956 err
= pci_enable_device(pdev
);
958 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
959 err
= pci_enable_device_mem(pdev
);
964 err
= pci_request_selected_regions(pdev
, bars
, e1000_driver_name
);
968 pci_set_master(pdev
);
969 err
= pci_save_state(pdev
);
971 goto err_alloc_etherdev
;
974 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
976 goto err_alloc_etherdev
;
978 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
980 pci_set_drvdata(pdev
, netdev
);
981 adapter
= netdev_priv(netdev
);
982 adapter
->netdev
= netdev
;
983 adapter
->pdev
= pdev
;
984 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
985 adapter
->bars
= bars
;
986 adapter
->need_ioport
= need_ioport
;
992 hw
->hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
996 if (adapter
->need_ioport
) {
997 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
998 if (pci_resource_len(pdev
, i
) == 0)
1000 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
1001 hw
->io_base
= pci_resource_start(pdev
, i
);
1007 /* make ready for any if (hw->...) below */
1008 err
= e1000_init_hw_struct(adapter
, hw
);
1012 /* there is a workaround being applied below that limits
1013 * 64-bit DMA addresses to 64-bit hardware. There are some
1014 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1017 if ((hw
->bus_type
== e1000_bus_type_pcix
) &&
1018 !dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64))) {
1019 /* according to DMA-API-HOWTO, coherent calls will always
1020 * succeed if the set call did
1022 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
1025 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1027 pr_err("No usable DMA config, aborting\n");
1030 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1033 netdev
->netdev_ops
= &e1000_netdev_ops
;
1034 e1000_set_ethtool_ops(netdev
);
1035 netdev
->watchdog_timeo
= 5 * HZ
;
1036 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
1038 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
1040 adapter
->bd_number
= cards_found
;
1042 /* setup the private structure */
1044 err
= e1000_sw_init(adapter
);
1049 if (hw
->mac_type
== e1000_ce4100
) {
1050 hw
->ce4100_gbe_mdio_base_virt
=
1051 ioremap(pci_resource_start(pdev
, BAR_1
),
1052 pci_resource_len(pdev
, BAR_1
));
1054 if (!hw
->ce4100_gbe_mdio_base_virt
)
1055 goto err_mdio_ioremap
;
1058 if (hw
->mac_type
>= e1000_82543
) {
1059 netdev
->hw_features
= NETIF_F_SG
|
1062 netdev
->features
= NETIF_F_HW_VLAN_TX
|
1063 NETIF_F_HW_VLAN_FILTER
;
1066 if ((hw
->mac_type
>= e1000_82544
) &&
1067 (hw
->mac_type
!= e1000_82547
))
1068 netdev
->hw_features
|= NETIF_F_TSO
;
1070 netdev
->priv_flags
|= IFF_SUPP_NOFCS
;
1072 netdev
->features
|= netdev
->hw_features
;
1073 netdev
->hw_features
|= (NETIF_F_RXCSUM
|
1077 if (pci_using_dac
) {
1078 netdev
->features
|= NETIF_F_HIGHDMA
;
1079 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
1082 netdev
->vlan_features
|= (NETIF_F_TSO
|
1086 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
1088 adapter
->en_mng_pt
= e1000_enable_mng_pass_thru(hw
);
1090 /* initialize eeprom parameters */
1091 if (e1000_init_eeprom_params(hw
)) {
1092 e_err(probe
, "EEPROM initialization failed\n");
1096 /* before reading the EEPROM, reset the controller to
1097 * put the device in a known good starting state
1102 /* make sure the EEPROM is good */
1103 if (e1000_validate_eeprom_checksum(hw
) < 0) {
1104 e_err(probe
, "The EEPROM Checksum Is Not Valid\n");
1105 e1000_dump_eeprom(adapter
);
1106 /* set MAC address to all zeroes to invalidate and temporary
1107 * disable this device for the user. This blocks regular
1108 * traffic while still permitting ethtool ioctls from reaching
1109 * the hardware as well as allowing the user to run the
1110 * interface after manually setting a hw addr using
1113 memset(hw
->mac_addr
, 0, netdev
->addr_len
);
1115 /* copy the MAC address out of the EEPROM */
1116 if (e1000_read_mac_addr(hw
))
1117 e_err(probe
, "EEPROM Read Error\n");
1119 /* don't block initalization here due to bad MAC address */
1120 memcpy(netdev
->dev_addr
, hw
->mac_addr
, netdev
->addr_len
);
1122 if (!is_valid_ether_addr(netdev
->dev_addr
))
1123 e_err(probe
, "Invalid MAC Address\n");
1126 INIT_DELAYED_WORK(&adapter
->watchdog_task
, e1000_watchdog
);
1127 INIT_DELAYED_WORK(&adapter
->fifo_stall_task
,
1128 e1000_82547_tx_fifo_stall_task
);
1129 INIT_DELAYED_WORK(&adapter
->phy_info_task
, e1000_update_phy_info_task
);
1130 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
1132 e1000_check_options(adapter
);
1134 /* Initial Wake on LAN setting
1135 * If APM wake is enabled in the EEPROM,
1136 * enable the ACPI Magic Packet filter
1139 switch (hw
->mac_type
) {
1140 case e1000_82542_rev2_0
:
1141 case e1000_82542_rev2_1
:
1145 e1000_read_eeprom(hw
,
1146 EEPROM_INIT_CONTROL2_REG
, 1, &eeprom_data
);
1147 eeprom_apme_mask
= E1000_EEPROM_82544_APM
;
1150 case e1000_82546_rev_3
:
1151 if (er32(STATUS
) & E1000_STATUS_FUNC_1
){
1152 e1000_read_eeprom(hw
,
1153 EEPROM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
1158 e1000_read_eeprom(hw
,
1159 EEPROM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1162 if (eeprom_data
& eeprom_apme_mask
)
1163 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1165 /* now that we have the eeprom settings, apply the special cases
1166 * where the eeprom may be wrong or the board simply won't support
1167 * wake on lan on a particular port
1169 switch (pdev
->device
) {
1170 case E1000_DEV_ID_82546GB_PCIE
:
1171 adapter
->eeprom_wol
= 0;
1173 case E1000_DEV_ID_82546EB_FIBER
:
1174 case E1000_DEV_ID_82546GB_FIBER
:
1175 /* Wake events only supported on port A for dual fiber
1176 * regardless of eeprom setting
1178 if (er32(STATUS
) & E1000_STATUS_FUNC_1
)
1179 adapter
->eeprom_wol
= 0;
1181 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3
:
1182 /* if quad port adapter, disable WoL on all but port A */
1183 if (global_quad_port_a
!= 0)
1184 adapter
->eeprom_wol
= 0;
1186 adapter
->quad_port_a
= true;
1187 /* Reset for multiple quad port adapters */
1188 if (++global_quad_port_a
== 4)
1189 global_quad_port_a
= 0;
1193 /* initialize the wol settings based on the eeprom settings */
1194 adapter
->wol
= adapter
->eeprom_wol
;
1195 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1197 /* Auto detect PHY address */
1198 if (hw
->mac_type
== e1000_ce4100
) {
1199 for (i
= 0; i
< 32; i
++) {
1201 e1000_read_phy_reg(hw
, PHY_ID2
, &tmp
);
1202 if (tmp
== 0 || tmp
== 0xFF) {
1211 /* reset the hardware with the new settings */
1212 e1000_reset(adapter
);
1214 strcpy(netdev
->name
, "eth%d");
1215 err
= register_netdev(netdev
);
1219 e1000_vlan_filter_on_off(adapter
, false);
1221 /* print bus type/speed/width info */
1222 e_info(probe
, "(PCI%s:%dMHz:%d-bit) %pM\n",
1223 ((hw
->bus_type
== e1000_bus_type_pcix
) ? "-X" : ""),
1224 ((hw
->bus_speed
== e1000_bus_speed_133
) ? 133 :
1225 (hw
->bus_speed
== e1000_bus_speed_120
) ? 120 :
1226 (hw
->bus_speed
== e1000_bus_speed_100
) ? 100 :
1227 (hw
->bus_speed
== e1000_bus_speed_66
) ? 66 : 33),
1228 ((hw
->bus_width
== e1000_bus_width_64
) ? 64 : 32),
1231 /* carrier off reporting is important to ethtool even BEFORE open */
1232 netif_carrier_off(netdev
);
1234 e_info(probe
, "Intel(R) PRO/1000 Network Connection\n");
1241 e1000_phy_hw_reset(hw
);
1243 if (hw
->flash_address
)
1244 iounmap(hw
->flash_address
);
1245 kfree(adapter
->tx_ring
);
1246 kfree(adapter
->rx_ring
);
1250 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1251 iounmap(hw
->hw_addr
);
1253 free_netdev(netdev
);
1255 pci_release_selected_regions(pdev
, bars
);
1257 pci_disable_device(pdev
);
1262 * e1000_remove - Device Removal Routine
1263 * @pdev: PCI device information struct
1265 * e1000_remove is called by the PCI subsystem to alert the driver
1266 * that it should release a PCI device. The could be caused by a
1267 * Hot-Plug event, or because the driver is going to be removed from
1270 static void e1000_remove(struct pci_dev
*pdev
)
1272 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1273 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1274 struct e1000_hw
*hw
= &adapter
->hw
;
1276 e1000_down_and_stop(adapter
);
1277 e1000_release_manageability(adapter
);
1279 unregister_netdev(netdev
);
1281 e1000_phy_hw_reset(hw
);
1283 kfree(adapter
->tx_ring
);
1284 kfree(adapter
->rx_ring
);
1286 if (hw
->mac_type
== e1000_ce4100
)
1287 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1288 iounmap(hw
->hw_addr
);
1289 if (hw
->flash_address
)
1290 iounmap(hw
->flash_address
);
1291 pci_release_selected_regions(pdev
, adapter
->bars
);
1293 free_netdev(netdev
);
1295 pci_disable_device(pdev
);
1299 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1300 * @adapter: board private structure to initialize
1302 * e1000_sw_init initializes the Adapter private data structure.
1303 * e1000_init_hw_struct MUST be called before this function
1305 static int e1000_sw_init(struct e1000_adapter
*adapter
)
1307 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1309 adapter
->num_tx_queues
= 1;
1310 adapter
->num_rx_queues
= 1;
1312 if (e1000_alloc_queues(adapter
)) {
1313 e_err(probe
, "Unable to allocate memory for queues\n");
1317 /* Explicitly disable IRQ since the NIC can be in any state. */
1318 e1000_irq_disable(adapter
);
1320 spin_lock_init(&adapter
->stats_lock
);
1321 mutex_init(&adapter
->mutex
);
1323 set_bit(__E1000_DOWN
, &adapter
->flags
);
1329 * e1000_alloc_queues - Allocate memory for all rings
1330 * @adapter: board private structure to initialize
1332 * We allocate one ring per queue at run-time since we don't know the
1333 * number of queues at compile-time.
1335 static int e1000_alloc_queues(struct e1000_adapter
*adapter
)
1337 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
1338 sizeof(struct e1000_tx_ring
), GFP_KERNEL
);
1339 if (!adapter
->tx_ring
)
1342 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
1343 sizeof(struct e1000_rx_ring
), GFP_KERNEL
);
1344 if (!adapter
->rx_ring
) {
1345 kfree(adapter
->tx_ring
);
1349 return E1000_SUCCESS
;
1353 * e1000_open - Called when a network interface is made active
1354 * @netdev: network interface device structure
1356 * Returns 0 on success, negative value on failure
1358 * The open entry point is called when a network interface is made
1359 * active by the system (IFF_UP). At this point all resources needed
1360 * for transmit and receive operations are allocated, the interrupt
1361 * handler is registered with the OS, the watchdog task is started,
1362 * and the stack is notified that the interface is ready.
1364 static int e1000_open(struct net_device
*netdev
)
1366 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1367 struct e1000_hw
*hw
= &adapter
->hw
;
1370 /* disallow open during test */
1371 if (test_bit(__E1000_TESTING
, &adapter
->flags
))
1374 netif_carrier_off(netdev
);
1376 /* allocate transmit descriptors */
1377 err
= e1000_setup_all_tx_resources(adapter
);
1381 /* allocate receive descriptors */
1382 err
= e1000_setup_all_rx_resources(adapter
);
1386 e1000_power_up_phy(adapter
);
1388 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
1389 if ((hw
->mng_cookie
.status
&
1390 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
)) {
1391 e1000_update_mng_vlan(adapter
);
1394 /* before we allocate an interrupt, we must be ready to handle it.
1395 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1396 * as soon as we call pci_request_irq, so we have to setup our
1397 * clean_rx handler before we do so.
1399 e1000_configure(adapter
);
1401 err
= e1000_request_irq(adapter
);
1405 /* From here on the code is the same as e1000_up() */
1406 clear_bit(__E1000_DOWN
, &adapter
->flags
);
1408 napi_enable(&adapter
->napi
);
1410 e1000_irq_enable(adapter
);
1412 netif_start_queue(netdev
);
1414 /* fire a link status change interrupt to start the watchdog */
1415 ew32(ICS
, E1000_ICS_LSC
);
1417 return E1000_SUCCESS
;
1420 e1000_power_down_phy(adapter
);
1421 e1000_free_all_rx_resources(adapter
);
1423 e1000_free_all_tx_resources(adapter
);
1425 e1000_reset(adapter
);
1431 * e1000_close - Disables a network interface
1432 * @netdev: network interface device structure
1434 * Returns 0, this is not allowed to fail
1436 * The close entry point is called when an interface is de-activated
1437 * by the OS. The hardware is still under the drivers control, but
1438 * needs to be disabled. A global MAC reset is issued to stop the
1439 * hardware, and all transmit and receive resources are freed.
1441 static int e1000_close(struct net_device
*netdev
)
1443 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1444 struct e1000_hw
*hw
= &adapter
->hw
;
1446 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
1447 e1000_down(adapter
);
1448 e1000_power_down_phy(adapter
);
1449 e1000_free_irq(adapter
);
1451 e1000_free_all_tx_resources(adapter
);
1452 e1000_free_all_rx_resources(adapter
);
1454 /* kill manageability vlan ID if supported, but not if a vlan with
1455 * the same ID is registered on the host OS (let 8021q kill it)
1457 if ((hw
->mng_cookie
.status
&
1458 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
1459 !test_bit(adapter
->mng_vlan_id
, adapter
->active_vlans
)) {
1460 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1467 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1468 * @adapter: address of board private structure
1469 * @start: address of beginning of memory
1470 * @len: length of memory
1472 static bool e1000_check_64k_bound(struct e1000_adapter
*adapter
, void *start
,
1475 struct e1000_hw
*hw
= &adapter
->hw
;
1476 unsigned long begin
= (unsigned long)start
;
1477 unsigned long end
= begin
+ len
;
1479 /* First rev 82545 and 82546 need to not allow any memory
1480 * write location to cross 64k boundary due to errata 23
1482 if (hw
->mac_type
== e1000_82545
||
1483 hw
->mac_type
== e1000_ce4100
||
1484 hw
->mac_type
== e1000_82546
) {
1485 return ((begin
^ (end
- 1)) >> 16) != 0 ? false : true;
1492 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1493 * @adapter: board private structure
1494 * @txdr: tx descriptor ring (for a specific queue) to setup
1496 * Return 0 on success, negative on failure
1498 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
1499 struct e1000_tx_ring
*txdr
)
1501 struct pci_dev
*pdev
= adapter
->pdev
;
1504 size
= sizeof(struct e1000_buffer
) * txdr
->count
;
1505 txdr
->buffer_info
= vzalloc(size
);
1506 if (!txdr
->buffer_info
)
1509 /* round up to nearest 4K */
1511 txdr
->size
= txdr
->count
* sizeof(struct e1000_tx_desc
);
1512 txdr
->size
= ALIGN(txdr
->size
, 4096);
1514 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
1518 vfree(txdr
->buffer_info
);
1519 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1524 /* Fix for errata 23, can't cross 64kB boundary */
1525 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1526 void *olddesc
= txdr
->desc
;
1527 dma_addr_t olddma
= txdr
->dma
;
1528 e_err(tx_err
, "txdr align check failed: %u bytes at %p\n",
1529 txdr
->size
, txdr
->desc
);
1530 /* Try again, without freeing the previous */
1531 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
,
1532 &txdr
->dma
, GFP_KERNEL
);
1533 /* Failed allocation, critical failure */
1535 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1537 goto setup_tx_desc_die
;
1540 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1542 dma_free_coherent(&pdev
->dev
, txdr
->size
, txdr
->desc
,
1544 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1546 e_err(probe
, "Unable to allocate aligned memory "
1547 "for the transmit descriptor ring\n");
1548 vfree(txdr
->buffer_info
);
1551 /* Free old allocation, new allocation was successful */
1552 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1556 memset(txdr
->desc
, 0, txdr
->size
);
1558 txdr
->next_to_use
= 0;
1559 txdr
->next_to_clean
= 0;
1565 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1566 * (Descriptors) for all queues
1567 * @adapter: board private structure
1569 * Return 0 on success, negative on failure
1571 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
)
1575 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1576 err
= e1000_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1578 e_err(probe
, "Allocation for Tx Queue %u failed\n", i
);
1579 for (i
-- ; i
>= 0; i
--)
1580 e1000_free_tx_resources(adapter
,
1581 &adapter
->tx_ring
[i
]);
1590 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1591 * @adapter: board private structure
1593 * Configure the Tx unit of the MAC after a reset.
1595 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
1598 struct e1000_hw
*hw
= &adapter
->hw
;
1599 u32 tdlen
, tctl
, tipg
;
1602 /* Setup the HW Tx Head and Tail descriptor pointers */
1604 switch (adapter
->num_tx_queues
) {
1607 tdba
= adapter
->tx_ring
[0].dma
;
1608 tdlen
= adapter
->tx_ring
[0].count
*
1609 sizeof(struct e1000_tx_desc
);
1611 ew32(TDBAH
, (tdba
>> 32));
1612 ew32(TDBAL
, (tdba
& 0x00000000ffffffffULL
));
1615 adapter
->tx_ring
[0].tdh
= ((hw
->mac_type
>= e1000_82543
) ?
1616 E1000_TDH
: E1000_82542_TDH
);
1617 adapter
->tx_ring
[0].tdt
= ((hw
->mac_type
>= e1000_82543
) ?
1618 E1000_TDT
: E1000_82542_TDT
);
1622 /* Set the default values for the Tx Inter Packet Gap timer */
1623 if ((hw
->media_type
== e1000_media_type_fiber
||
1624 hw
->media_type
== e1000_media_type_internal_serdes
))
1625 tipg
= DEFAULT_82543_TIPG_IPGT_FIBER
;
1627 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
;
1629 switch (hw
->mac_type
) {
1630 case e1000_82542_rev2_0
:
1631 case e1000_82542_rev2_1
:
1632 tipg
= DEFAULT_82542_TIPG_IPGT
;
1633 ipgr1
= DEFAULT_82542_TIPG_IPGR1
;
1634 ipgr2
= DEFAULT_82542_TIPG_IPGR2
;
1637 ipgr1
= DEFAULT_82543_TIPG_IPGR1
;
1638 ipgr2
= DEFAULT_82543_TIPG_IPGR2
;
1641 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
1642 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
1645 /* Set the Tx Interrupt Delay register */
1647 ew32(TIDV
, adapter
->tx_int_delay
);
1648 if (hw
->mac_type
>= e1000_82540
)
1649 ew32(TADV
, adapter
->tx_abs_int_delay
);
1651 /* Program the Transmit Control Register */
1654 tctl
&= ~E1000_TCTL_CT
;
1655 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1656 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1658 e1000_config_collision_dist(hw
);
1660 /* Setup Transmit Descriptor Settings for eop descriptor */
1661 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
1663 /* only set IDE if we are delaying interrupts using the timers */
1664 if (adapter
->tx_int_delay
)
1665 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
1667 if (hw
->mac_type
< e1000_82543
)
1668 adapter
->txd_cmd
|= E1000_TXD_CMD_RPS
;
1670 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
1672 /* Cache if we're 82544 running in PCI-X because we'll
1673 * need this to apply a workaround later in the send path.
1675 if (hw
->mac_type
== e1000_82544
&&
1676 hw
->bus_type
== e1000_bus_type_pcix
)
1677 adapter
->pcix_82544
= true;
1684 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1685 * @adapter: board private structure
1686 * @rxdr: rx descriptor ring (for a specific queue) to setup
1688 * Returns 0 on success, negative on failure
1690 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
1691 struct e1000_rx_ring
*rxdr
)
1693 struct pci_dev
*pdev
= adapter
->pdev
;
1696 size
= sizeof(struct e1000_buffer
) * rxdr
->count
;
1697 rxdr
->buffer_info
= vzalloc(size
);
1698 if (!rxdr
->buffer_info
)
1701 desc_len
= sizeof(struct e1000_rx_desc
);
1703 /* Round up to nearest 4K */
1705 rxdr
->size
= rxdr
->count
* desc_len
;
1706 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
1708 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
1712 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1715 vfree(rxdr
->buffer_info
);
1719 /* Fix for errata 23, can't cross 64kB boundary */
1720 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1721 void *olddesc
= rxdr
->desc
;
1722 dma_addr_t olddma
= rxdr
->dma
;
1723 e_err(rx_err
, "rxdr align check failed: %u bytes at %p\n",
1724 rxdr
->size
, rxdr
->desc
);
1725 /* Try again, without freeing the previous */
1726 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
,
1727 &rxdr
->dma
, GFP_KERNEL
);
1728 /* Failed allocation, critical failure */
1730 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1732 e_err(probe
, "Unable to allocate memory for the Rx "
1733 "descriptor ring\n");
1734 goto setup_rx_desc_die
;
1737 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1739 dma_free_coherent(&pdev
->dev
, rxdr
->size
, rxdr
->desc
,
1741 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1743 e_err(probe
, "Unable to allocate aligned memory for "
1744 "the Rx descriptor ring\n");
1745 goto setup_rx_desc_die
;
1747 /* Free old allocation, new allocation was successful */
1748 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1752 memset(rxdr
->desc
, 0, rxdr
->size
);
1754 rxdr
->next_to_clean
= 0;
1755 rxdr
->next_to_use
= 0;
1756 rxdr
->rx_skb_top
= NULL
;
1762 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1763 * (Descriptors) for all queues
1764 * @adapter: board private structure
1766 * Return 0 on success, negative on failure
1768 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
)
1772 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1773 err
= e1000_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1775 e_err(probe
, "Allocation for Rx Queue %u failed\n", i
);
1776 for (i
-- ; i
>= 0; i
--)
1777 e1000_free_rx_resources(adapter
,
1778 &adapter
->rx_ring
[i
]);
1787 * e1000_setup_rctl - configure the receive control registers
1788 * @adapter: Board private structure
1790 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
1792 struct e1000_hw
*hw
= &adapter
->hw
;
1797 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1799 rctl
|= E1000_RCTL_BAM
| E1000_RCTL_LBM_NO
|
1800 E1000_RCTL_RDMTS_HALF
|
1801 (hw
->mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1803 if (hw
->tbi_compatibility_on
== 1)
1804 rctl
|= E1000_RCTL_SBP
;
1806 rctl
&= ~E1000_RCTL_SBP
;
1808 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1809 rctl
&= ~E1000_RCTL_LPE
;
1811 rctl
|= E1000_RCTL_LPE
;
1813 /* Setup buffer sizes */
1814 rctl
&= ~E1000_RCTL_SZ_4096
;
1815 rctl
|= E1000_RCTL_BSEX
;
1816 switch (adapter
->rx_buffer_len
) {
1817 case E1000_RXBUFFER_2048
:
1819 rctl
|= E1000_RCTL_SZ_2048
;
1820 rctl
&= ~E1000_RCTL_BSEX
;
1822 case E1000_RXBUFFER_4096
:
1823 rctl
|= E1000_RCTL_SZ_4096
;
1825 case E1000_RXBUFFER_8192
:
1826 rctl
|= E1000_RCTL_SZ_8192
;
1828 case E1000_RXBUFFER_16384
:
1829 rctl
|= E1000_RCTL_SZ_16384
;
1833 /* This is useful for sniffing bad packets. */
1834 if (adapter
->netdev
->features
& NETIF_F_RXALL
) {
1835 /* UPE and MPE will be handled by normal PROMISC logic
1836 * in e1000e_set_rx_mode
1838 rctl
|= (E1000_RCTL_SBP
| /* Receive bad packets */
1839 E1000_RCTL_BAM
| /* RX All Bcast Pkts */
1840 E1000_RCTL_PMCF
); /* RX All MAC Ctrl Pkts */
1842 rctl
&= ~(E1000_RCTL_VFE
| /* Disable VLAN filter */
1843 E1000_RCTL_DPF
| /* Allow filtered pause */
1844 E1000_RCTL_CFIEN
); /* Dis VLAN CFIEN Filter */
1845 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1846 * and that breaks VLANs.
1854 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1855 * @adapter: board private structure
1857 * Configure the Rx unit of the MAC after a reset.
1859 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
1862 struct e1000_hw
*hw
= &adapter
->hw
;
1863 u32 rdlen
, rctl
, rxcsum
;
1865 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1866 rdlen
= adapter
->rx_ring
[0].count
*
1867 sizeof(struct e1000_rx_desc
);
1868 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
1869 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
1871 rdlen
= adapter
->rx_ring
[0].count
*
1872 sizeof(struct e1000_rx_desc
);
1873 adapter
->clean_rx
= e1000_clean_rx_irq
;
1874 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
1877 /* disable receives while setting up the descriptors */
1879 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1881 /* set the Receive Delay Timer Register */
1882 ew32(RDTR
, adapter
->rx_int_delay
);
1884 if (hw
->mac_type
>= e1000_82540
) {
1885 ew32(RADV
, adapter
->rx_abs_int_delay
);
1886 if (adapter
->itr_setting
!= 0)
1887 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
1890 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1891 * the Base and Length of the Rx Descriptor Ring
1893 switch (adapter
->num_rx_queues
) {
1896 rdba
= adapter
->rx_ring
[0].dma
;
1898 ew32(RDBAH
, (rdba
>> 32));
1899 ew32(RDBAL
, (rdba
& 0x00000000ffffffffULL
));
1902 adapter
->rx_ring
[0].rdh
= ((hw
->mac_type
>= e1000_82543
) ?
1903 E1000_RDH
: E1000_82542_RDH
);
1904 adapter
->rx_ring
[0].rdt
= ((hw
->mac_type
>= e1000_82543
) ?
1905 E1000_RDT
: E1000_82542_RDT
);
1909 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1910 if (hw
->mac_type
>= e1000_82543
) {
1911 rxcsum
= er32(RXCSUM
);
1912 if (adapter
->rx_csum
)
1913 rxcsum
|= E1000_RXCSUM_TUOFL
;
1915 /* don't need to clear IPPCSE as it defaults to 0 */
1916 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1917 ew32(RXCSUM
, rxcsum
);
1920 /* Enable Receives */
1921 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
1925 * e1000_free_tx_resources - Free Tx Resources per Queue
1926 * @adapter: board private structure
1927 * @tx_ring: Tx descriptor ring for a specific queue
1929 * Free all transmit software resources
1931 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
1932 struct e1000_tx_ring
*tx_ring
)
1934 struct pci_dev
*pdev
= adapter
->pdev
;
1936 e1000_clean_tx_ring(adapter
, tx_ring
);
1938 vfree(tx_ring
->buffer_info
);
1939 tx_ring
->buffer_info
= NULL
;
1941 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1944 tx_ring
->desc
= NULL
;
1948 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1949 * @adapter: board private structure
1951 * Free all transmit software resources
1953 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
)
1957 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1958 e1000_free_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1961 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter
*adapter
,
1962 struct e1000_buffer
*buffer_info
)
1964 if (buffer_info
->dma
) {
1965 if (buffer_info
->mapped_as_page
)
1966 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1967 buffer_info
->length
, DMA_TO_DEVICE
);
1969 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1970 buffer_info
->length
,
1972 buffer_info
->dma
= 0;
1974 if (buffer_info
->skb
) {
1975 dev_kfree_skb_any(buffer_info
->skb
);
1976 buffer_info
->skb
= NULL
;
1978 buffer_info
->time_stamp
= 0;
1979 /* buffer_info must be completely set up in the transmit path */
1983 * e1000_clean_tx_ring - Free Tx Buffers
1984 * @adapter: board private structure
1985 * @tx_ring: ring to be cleaned
1987 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
1988 struct e1000_tx_ring
*tx_ring
)
1990 struct e1000_hw
*hw
= &adapter
->hw
;
1991 struct e1000_buffer
*buffer_info
;
1995 /* Free all the Tx ring sk_buffs */
1997 for (i
= 0; i
< tx_ring
->count
; i
++) {
1998 buffer_info
= &tx_ring
->buffer_info
[i
];
1999 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2002 netdev_reset_queue(adapter
->netdev
);
2003 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
2004 memset(tx_ring
->buffer_info
, 0, size
);
2006 /* Zero out the descriptor ring */
2008 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2010 tx_ring
->next_to_use
= 0;
2011 tx_ring
->next_to_clean
= 0;
2012 tx_ring
->last_tx_tso
= false;
2014 writel(0, hw
->hw_addr
+ tx_ring
->tdh
);
2015 writel(0, hw
->hw_addr
+ tx_ring
->tdt
);
2019 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2020 * @adapter: board private structure
2022 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
)
2026 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2027 e1000_clean_tx_ring(adapter
, &adapter
->tx_ring
[i
]);
2031 * e1000_free_rx_resources - Free Rx Resources
2032 * @adapter: board private structure
2033 * @rx_ring: ring to clean the resources from
2035 * Free all receive software resources
2037 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
2038 struct e1000_rx_ring
*rx_ring
)
2040 struct pci_dev
*pdev
= adapter
->pdev
;
2042 e1000_clean_rx_ring(adapter
, rx_ring
);
2044 vfree(rx_ring
->buffer_info
);
2045 rx_ring
->buffer_info
= NULL
;
2047 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
2050 rx_ring
->desc
= NULL
;
2054 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2055 * @adapter: board private structure
2057 * Free all receive software resources
2059 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
)
2063 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2064 e1000_free_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
2068 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2069 * @adapter: board private structure
2070 * @rx_ring: ring to free buffers from
2072 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
2073 struct e1000_rx_ring
*rx_ring
)
2075 struct e1000_hw
*hw
= &adapter
->hw
;
2076 struct e1000_buffer
*buffer_info
;
2077 struct pci_dev
*pdev
= adapter
->pdev
;
2081 /* Free all the Rx ring sk_buffs */
2082 for (i
= 0; i
< rx_ring
->count
; i
++) {
2083 buffer_info
= &rx_ring
->buffer_info
[i
];
2084 if (buffer_info
->dma
&&
2085 adapter
->clean_rx
== e1000_clean_rx_irq
) {
2086 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
2087 buffer_info
->length
,
2089 } else if (buffer_info
->dma
&&
2090 adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
) {
2091 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
2092 buffer_info
->length
,
2096 buffer_info
->dma
= 0;
2097 if (buffer_info
->page
) {
2098 put_page(buffer_info
->page
);
2099 buffer_info
->page
= NULL
;
2101 if (buffer_info
->skb
) {
2102 dev_kfree_skb(buffer_info
->skb
);
2103 buffer_info
->skb
= NULL
;
2107 /* there also may be some cached data from a chained receive */
2108 if (rx_ring
->rx_skb_top
) {
2109 dev_kfree_skb(rx_ring
->rx_skb_top
);
2110 rx_ring
->rx_skb_top
= NULL
;
2113 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
2114 memset(rx_ring
->buffer_info
, 0, size
);
2116 /* Zero out the descriptor ring */
2117 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2119 rx_ring
->next_to_clean
= 0;
2120 rx_ring
->next_to_use
= 0;
2122 writel(0, hw
->hw_addr
+ rx_ring
->rdh
);
2123 writel(0, hw
->hw_addr
+ rx_ring
->rdt
);
2127 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2128 * @adapter: board private structure
2130 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
)
2134 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2135 e1000_clean_rx_ring(adapter
, &adapter
->rx_ring
[i
]);
2138 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2139 * and memory write and invalidate disabled for certain operations
2141 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
)
2143 struct e1000_hw
*hw
= &adapter
->hw
;
2144 struct net_device
*netdev
= adapter
->netdev
;
2147 e1000_pci_clear_mwi(hw
);
2150 rctl
|= E1000_RCTL_RST
;
2152 E1000_WRITE_FLUSH();
2155 if (netif_running(netdev
))
2156 e1000_clean_all_rx_rings(adapter
);
2159 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
)
2161 struct e1000_hw
*hw
= &adapter
->hw
;
2162 struct net_device
*netdev
= adapter
->netdev
;
2166 rctl
&= ~E1000_RCTL_RST
;
2168 E1000_WRITE_FLUSH();
2171 if (hw
->pci_cmd_word
& PCI_COMMAND_INVALIDATE
)
2172 e1000_pci_set_mwi(hw
);
2174 if (netif_running(netdev
)) {
2175 /* No need to loop, because 82542 supports only 1 queue */
2176 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[0];
2177 e1000_configure_rx(adapter
);
2178 adapter
->alloc_rx_buf(adapter
, ring
, E1000_DESC_UNUSED(ring
));
2183 * e1000_set_mac - Change the Ethernet Address of the NIC
2184 * @netdev: network interface device structure
2185 * @p: pointer to an address structure
2187 * Returns 0 on success, negative on failure
2189 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
2191 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2192 struct e1000_hw
*hw
= &adapter
->hw
;
2193 struct sockaddr
*addr
= p
;
2195 if (!is_valid_ether_addr(addr
->sa_data
))
2196 return -EADDRNOTAVAIL
;
2198 /* 82542 2.0 needs to be in reset to write receive address registers */
2200 if (hw
->mac_type
== e1000_82542_rev2_0
)
2201 e1000_enter_82542_rst(adapter
);
2203 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2204 memcpy(hw
->mac_addr
, addr
->sa_data
, netdev
->addr_len
);
2206 e1000_rar_set(hw
, hw
->mac_addr
, 0);
2208 if (hw
->mac_type
== e1000_82542_rev2_0
)
2209 e1000_leave_82542_rst(adapter
);
2215 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2216 * @netdev: network interface device structure
2218 * The set_rx_mode entry point is called whenever the unicast or multicast
2219 * address lists or the network interface flags are updated. This routine is
2220 * responsible for configuring the hardware for proper unicast, multicast,
2221 * promiscuous mode, and all-multi behavior.
2223 static void e1000_set_rx_mode(struct net_device
*netdev
)
2225 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2226 struct e1000_hw
*hw
= &adapter
->hw
;
2227 struct netdev_hw_addr
*ha
;
2228 bool use_uc
= false;
2231 int i
, rar_entries
= E1000_RAR_ENTRIES
;
2232 int mta_reg_count
= E1000_NUM_MTA_REGISTERS
;
2233 u32
*mcarray
= kcalloc(mta_reg_count
, sizeof(u32
), GFP_ATOMIC
);
2238 /* Check for Promiscuous and All Multicast modes */
2242 if (netdev
->flags
& IFF_PROMISC
) {
2243 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2244 rctl
&= ~E1000_RCTL_VFE
;
2246 if (netdev
->flags
& IFF_ALLMULTI
)
2247 rctl
|= E1000_RCTL_MPE
;
2249 rctl
&= ~E1000_RCTL_MPE
;
2250 /* Enable VLAN filter if there is a VLAN */
2251 if (e1000_vlan_used(adapter
))
2252 rctl
|= E1000_RCTL_VFE
;
2255 if (netdev_uc_count(netdev
) > rar_entries
- 1) {
2256 rctl
|= E1000_RCTL_UPE
;
2257 } else if (!(netdev
->flags
& IFF_PROMISC
)) {
2258 rctl
&= ~E1000_RCTL_UPE
;
2264 /* 82542 2.0 needs to be in reset to write receive address registers */
2266 if (hw
->mac_type
== e1000_82542_rev2_0
)
2267 e1000_enter_82542_rst(adapter
);
2269 /* load the first 14 addresses into the exact filters 1-14. Unicast
2270 * addresses take precedence to avoid disabling unicast filtering
2273 * RAR 0 is used for the station MAC address
2274 * if there are not 14 addresses, go ahead and clear the filters
2278 netdev_for_each_uc_addr(ha
, netdev
) {
2279 if (i
== rar_entries
)
2281 e1000_rar_set(hw
, ha
->addr
, i
++);
2284 netdev_for_each_mc_addr(ha
, netdev
) {
2285 if (i
== rar_entries
) {
2286 /* load any remaining addresses into the hash table */
2287 u32 hash_reg
, hash_bit
, mta
;
2288 hash_value
= e1000_hash_mc_addr(hw
, ha
->addr
);
2289 hash_reg
= (hash_value
>> 5) & 0x7F;
2290 hash_bit
= hash_value
& 0x1F;
2291 mta
= (1 << hash_bit
);
2292 mcarray
[hash_reg
] |= mta
;
2294 e1000_rar_set(hw
, ha
->addr
, i
++);
2298 for (; i
< rar_entries
; i
++) {
2299 E1000_WRITE_REG_ARRAY(hw
, RA
, i
<< 1, 0);
2300 E1000_WRITE_FLUSH();
2301 E1000_WRITE_REG_ARRAY(hw
, RA
, (i
<< 1) + 1, 0);
2302 E1000_WRITE_FLUSH();
2305 /* write the hash table completely, write from bottom to avoid
2306 * both stupid write combining chipsets, and flushing each write
2308 for (i
= mta_reg_count
- 1; i
>= 0 ; i
--) {
2309 /* If we are on an 82544 has an errata where writing odd
2310 * offsets overwrites the previous even offset, but writing
2311 * backwards over the range solves the issue by always
2312 * writing the odd offset first
2314 E1000_WRITE_REG_ARRAY(hw
, MTA
, i
, mcarray
[i
]);
2316 E1000_WRITE_FLUSH();
2318 if (hw
->mac_type
== e1000_82542_rev2_0
)
2319 e1000_leave_82542_rst(adapter
);
2325 * e1000_update_phy_info_task - get phy info
2326 * @work: work struct contained inside adapter struct
2328 * Need to wait a few seconds after link up to get diagnostic information from
2331 static void e1000_update_phy_info_task(struct work_struct
*work
)
2333 struct e1000_adapter
*adapter
= container_of(work
,
2334 struct e1000_adapter
,
2335 phy_info_task
.work
);
2336 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2338 mutex_lock(&adapter
->mutex
);
2339 e1000_phy_get_info(&adapter
->hw
, &adapter
->phy_info
);
2340 mutex_unlock(&adapter
->mutex
);
2344 * e1000_82547_tx_fifo_stall_task - task to complete work
2345 * @work: work struct contained inside adapter struct
2347 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
)
2349 struct e1000_adapter
*adapter
= container_of(work
,
2350 struct e1000_adapter
,
2351 fifo_stall_task
.work
);
2352 struct e1000_hw
*hw
= &adapter
->hw
;
2353 struct net_device
*netdev
= adapter
->netdev
;
2356 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2358 mutex_lock(&adapter
->mutex
);
2359 if (atomic_read(&adapter
->tx_fifo_stall
)) {
2360 if ((er32(TDT
) == er32(TDH
)) &&
2361 (er32(TDFT
) == er32(TDFH
)) &&
2362 (er32(TDFTS
) == er32(TDFHS
))) {
2364 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
2365 ew32(TDFT
, adapter
->tx_head_addr
);
2366 ew32(TDFH
, adapter
->tx_head_addr
);
2367 ew32(TDFTS
, adapter
->tx_head_addr
);
2368 ew32(TDFHS
, adapter
->tx_head_addr
);
2370 E1000_WRITE_FLUSH();
2372 adapter
->tx_fifo_head
= 0;
2373 atomic_set(&adapter
->tx_fifo_stall
, 0);
2374 netif_wake_queue(netdev
);
2375 } else if (!test_bit(__E1000_DOWN
, &adapter
->flags
)) {
2376 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
2379 mutex_unlock(&adapter
->mutex
);
2382 bool e1000_has_link(struct e1000_adapter
*adapter
)
2384 struct e1000_hw
*hw
= &adapter
->hw
;
2385 bool link_active
= false;
2387 /* get_link_status is set on LSC (link status) interrupt or rx
2388 * sequence error interrupt (except on intel ce4100).
2389 * get_link_status will stay false until the
2390 * e1000_check_for_link establishes link for copper adapters
2393 switch (hw
->media_type
) {
2394 case e1000_media_type_copper
:
2395 if (hw
->mac_type
== e1000_ce4100
)
2396 hw
->get_link_status
= 1;
2397 if (hw
->get_link_status
) {
2398 e1000_check_for_link(hw
);
2399 link_active
= !hw
->get_link_status
;
2404 case e1000_media_type_fiber
:
2405 e1000_check_for_link(hw
);
2406 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
2408 case e1000_media_type_internal_serdes
:
2409 e1000_check_for_link(hw
);
2410 link_active
= hw
->serdes_has_link
;
2420 * e1000_watchdog - work function
2421 * @work: work struct contained inside adapter struct
2423 static void e1000_watchdog(struct work_struct
*work
)
2425 struct e1000_adapter
*adapter
= container_of(work
,
2426 struct e1000_adapter
,
2427 watchdog_task
.work
);
2428 struct e1000_hw
*hw
= &adapter
->hw
;
2429 struct net_device
*netdev
= adapter
->netdev
;
2430 struct e1000_tx_ring
*txdr
= adapter
->tx_ring
;
2433 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2436 mutex_lock(&adapter
->mutex
);
2437 link
= e1000_has_link(adapter
);
2438 if ((netif_carrier_ok(netdev
)) && link
)
2442 if (!netif_carrier_ok(netdev
)) {
2445 /* update snapshot of PHY registers on LSC */
2446 e1000_get_speed_and_duplex(hw
,
2447 &adapter
->link_speed
,
2448 &adapter
->link_duplex
);
2451 pr_info("%s NIC Link is Up %d Mbps %s, "
2452 "Flow Control: %s\n",
2454 adapter
->link_speed
,
2455 adapter
->link_duplex
== FULL_DUPLEX
?
2456 "Full Duplex" : "Half Duplex",
2457 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2458 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2459 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2460 E1000_CTRL_TFCE
) ? "TX" : "None")));
2462 /* adjust timeout factor according to speed/duplex */
2463 adapter
->tx_timeout_factor
= 1;
2464 switch (adapter
->link_speed
) {
2467 adapter
->tx_timeout_factor
= 16;
2471 /* maybe add some timeout factor ? */
2475 /* enable transmits in the hardware */
2477 tctl
|= E1000_TCTL_EN
;
2480 netif_carrier_on(netdev
);
2481 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2482 schedule_delayed_work(&adapter
->phy_info_task
,
2484 adapter
->smartspeed
= 0;
2487 if (netif_carrier_ok(netdev
)) {
2488 adapter
->link_speed
= 0;
2489 adapter
->link_duplex
= 0;
2490 pr_info("%s NIC Link is Down\n",
2492 netif_carrier_off(netdev
);
2494 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2495 schedule_delayed_work(&adapter
->phy_info_task
,
2499 e1000_smartspeed(adapter
);
2503 e1000_update_stats(adapter
);
2505 hw
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2506 adapter
->tpt_old
= adapter
->stats
.tpt
;
2507 hw
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2508 adapter
->colc_old
= adapter
->stats
.colc
;
2510 adapter
->gorcl
= adapter
->stats
.gorcl
- adapter
->gorcl_old
;
2511 adapter
->gorcl_old
= adapter
->stats
.gorcl
;
2512 adapter
->gotcl
= adapter
->stats
.gotcl
- adapter
->gotcl_old
;
2513 adapter
->gotcl_old
= adapter
->stats
.gotcl
;
2515 e1000_update_adaptive(hw
);
2517 if (!netif_carrier_ok(netdev
)) {
2518 if (E1000_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
2519 /* We've lost link, so the controller stops DMA,
2520 * but we've got queued Tx work that's never going
2521 * to get done, so reset controller to flush Tx.
2522 * (Do the reset outside of interrupt context).
2524 adapter
->tx_timeout_count
++;
2525 schedule_work(&adapter
->reset_task
);
2526 /* exit immediately since reset is imminent */
2531 /* Simple mode for Interrupt Throttle Rate (ITR) */
2532 if (hw
->mac_type
>= e1000_82540
&& adapter
->itr_setting
== 4) {
2533 /* Symmetric Tx/Rx gets a reduced ITR=2000;
2534 * Total asymmetrical Tx or Rx gets ITR=8000;
2535 * everyone else is between 2000-8000.
2537 u32 goc
= (adapter
->gotcl
+ adapter
->gorcl
) / 10000;
2538 u32 dif
= (adapter
->gotcl
> adapter
->gorcl
?
2539 adapter
->gotcl
- adapter
->gorcl
:
2540 adapter
->gorcl
- adapter
->gotcl
) / 10000;
2541 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
2543 ew32(ITR
, 1000000000 / (itr
* 256));
2546 /* Cause software interrupt to ensure rx ring is cleaned */
2547 ew32(ICS
, E1000_ICS_RXDMT0
);
2549 /* Force detection of hung controller every watchdog period */
2550 adapter
->detect_tx_hung
= true;
2552 /* Reschedule the task */
2553 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2554 schedule_delayed_work(&adapter
->watchdog_task
, 2 * HZ
);
2557 mutex_unlock(&adapter
->mutex
);
2560 enum latency_range
{
2564 latency_invalid
= 255
2568 * e1000_update_itr - update the dynamic ITR value based on statistics
2569 * @adapter: pointer to adapter
2570 * @itr_setting: current adapter->itr
2571 * @packets: the number of packets during this measurement interval
2572 * @bytes: the number of bytes during this measurement interval
2574 * Stores a new ITR value based on packets and byte
2575 * counts during the last interrupt. The advantage of per interrupt
2576 * computation is faster updates and more accurate ITR for the current
2577 * traffic pattern. Constants in this function were computed
2578 * based on theoretical maximum wire speed and thresholds were set based
2579 * on testing data as well as attempting to minimize response time
2580 * while increasing bulk throughput.
2581 * this functionality is controlled by the InterruptThrottleRate module
2582 * parameter (see e1000_param.c)
2584 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2585 u16 itr_setting
, int packets
, int bytes
)
2587 unsigned int retval
= itr_setting
;
2588 struct e1000_hw
*hw
= &adapter
->hw
;
2590 if (unlikely(hw
->mac_type
< e1000_82540
))
2591 goto update_itr_done
;
2594 goto update_itr_done
;
2596 switch (itr_setting
) {
2597 case lowest_latency
:
2598 /* jumbo frames get bulk treatment*/
2599 if (bytes
/packets
> 8000)
2600 retval
= bulk_latency
;
2601 else if ((packets
< 5) && (bytes
> 512))
2602 retval
= low_latency
;
2604 case low_latency
: /* 50 usec aka 20000 ints/s */
2605 if (bytes
> 10000) {
2606 /* jumbo frames need bulk latency setting */
2607 if (bytes
/packets
> 8000)
2608 retval
= bulk_latency
;
2609 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2610 retval
= bulk_latency
;
2611 else if ((packets
> 35))
2612 retval
= lowest_latency
;
2613 } else if (bytes
/packets
> 2000)
2614 retval
= bulk_latency
;
2615 else if (packets
<= 2 && bytes
< 512)
2616 retval
= lowest_latency
;
2618 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2619 if (bytes
> 25000) {
2621 retval
= low_latency
;
2622 } else if (bytes
< 6000) {
2623 retval
= low_latency
;
2632 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2634 struct e1000_hw
*hw
= &adapter
->hw
;
2636 u32 new_itr
= adapter
->itr
;
2638 if (unlikely(hw
->mac_type
< e1000_82540
))
2641 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2642 if (unlikely(adapter
->link_speed
!= SPEED_1000
)) {
2648 adapter
->tx_itr
= e1000_update_itr(adapter
, adapter
->tx_itr
,
2649 adapter
->total_tx_packets
,
2650 adapter
->total_tx_bytes
);
2651 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2652 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2653 adapter
->tx_itr
= low_latency
;
2655 adapter
->rx_itr
= e1000_update_itr(adapter
, adapter
->rx_itr
,
2656 adapter
->total_rx_packets
,
2657 adapter
->total_rx_bytes
);
2658 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2659 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2660 adapter
->rx_itr
= low_latency
;
2662 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2664 switch (current_itr
) {
2665 /* counts and packets in update_itr are dependent on these numbers */
2666 case lowest_latency
:
2670 new_itr
= 20000; /* aka hwitr = ~200 */
2680 if (new_itr
!= adapter
->itr
) {
2681 /* this attempts to bias the interrupt rate towards Bulk
2682 * by adding intermediate steps when interrupt rate is
2685 new_itr
= new_itr
> adapter
->itr
?
2686 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2688 adapter
->itr
= new_itr
;
2689 ew32(ITR
, 1000000000 / (new_itr
* 256));
2693 #define E1000_TX_FLAGS_CSUM 0x00000001
2694 #define E1000_TX_FLAGS_VLAN 0x00000002
2695 #define E1000_TX_FLAGS_TSO 0x00000004
2696 #define E1000_TX_FLAGS_IPV4 0x00000008
2697 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2698 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2699 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2701 static int e1000_tso(struct e1000_adapter
*adapter
,
2702 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2704 struct e1000_context_desc
*context_desc
;
2705 struct e1000_buffer
*buffer_info
;
2708 u16 ipcse
= 0, tucse
, mss
;
2709 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
2712 if (skb_is_gso(skb
)) {
2713 if (skb_header_cloned(skb
)) {
2714 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2719 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2720 mss
= skb_shinfo(skb
)->gso_size
;
2721 if (skb
->protocol
== htons(ETH_P_IP
)) {
2722 struct iphdr
*iph
= ip_hdr(skb
);
2725 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2729 cmd_length
= E1000_TXD_CMD_IP
;
2730 ipcse
= skb_transport_offset(skb
) - 1;
2731 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
2732 ipv6_hdr(skb
)->payload_len
= 0;
2733 tcp_hdr(skb
)->check
=
2734 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2735 &ipv6_hdr(skb
)->daddr
,
2739 ipcss
= skb_network_offset(skb
);
2740 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
2741 tucss
= skb_transport_offset(skb
);
2742 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
2745 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
2746 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
2748 i
= tx_ring
->next_to_use
;
2749 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2750 buffer_info
= &tx_ring
->buffer_info
[i
];
2752 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
2753 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
2754 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
2755 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
2756 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
2757 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
2758 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
2759 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
2760 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
2762 buffer_info
->time_stamp
= jiffies
;
2763 buffer_info
->next_to_watch
= i
;
2765 if (++i
== tx_ring
->count
) i
= 0;
2766 tx_ring
->next_to_use
= i
;
2773 static bool e1000_tx_csum(struct e1000_adapter
*adapter
,
2774 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2776 struct e1000_context_desc
*context_desc
;
2777 struct e1000_buffer
*buffer_info
;
2780 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
2782 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
2785 switch (skb
->protocol
) {
2786 case cpu_to_be16(ETH_P_IP
):
2787 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2788 cmd_len
|= E1000_TXD_CMD_TCP
;
2790 case cpu_to_be16(ETH_P_IPV6
):
2791 /* XXX not handling all IPV6 headers */
2792 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2793 cmd_len
|= E1000_TXD_CMD_TCP
;
2796 if (unlikely(net_ratelimit()))
2797 e_warn(drv
, "checksum_partial proto=%x!\n",
2802 css
= skb_checksum_start_offset(skb
);
2804 i
= tx_ring
->next_to_use
;
2805 buffer_info
= &tx_ring
->buffer_info
[i
];
2806 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2808 context_desc
->lower_setup
.ip_config
= 0;
2809 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
2810 context_desc
->upper_setup
.tcp_fields
.tucso
=
2811 css
+ skb
->csum_offset
;
2812 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
2813 context_desc
->tcp_seg_setup
.data
= 0;
2814 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
2816 buffer_info
->time_stamp
= jiffies
;
2817 buffer_info
->next_to_watch
= i
;
2819 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2820 tx_ring
->next_to_use
= i
;
2825 #define E1000_MAX_TXD_PWR 12
2826 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2828 static int e1000_tx_map(struct e1000_adapter
*adapter
,
2829 struct e1000_tx_ring
*tx_ring
,
2830 struct sk_buff
*skb
, unsigned int first
,
2831 unsigned int max_per_txd
, unsigned int nr_frags
,
2834 struct e1000_hw
*hw
= &adapter
->hw
;
2835 struct pci_dev
*pdev
= adapter
->pdev
;
2836 struct e1000_buffer
*buffer_info
;
2837 unsigned int len
= skb_headlen(skb
);
2838 unsigned int offset
= 0, size
, count
= 0, i
;
2839 unsigned int f
, bytecount
, segs
;
2841 i
= tx_ring
->next_to_use
;
2844 buffer_info
= &tx_ring
->buffer_info
[i
];
2845 size
= min(len
, max_per_txd
);
2846 /* Workaround for Controller erratum --
2847 * descriptor for non-tso packet in a linear SKB that follows a
2848 * tso gets written back prematurely before the data is fully
2849 * DMA'd to the controller
2851 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&&
2853 tx_ring
->last_tx_tso
= false;
2857 /* Workaround for premature desc write-backs
2858 * in TSO mode. Append 4-byte sentinel desc
2860 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
2862 /* work-around for errata 10 and it applies
2863 * to all controllers in PCI-X mode
2864 * The fix is to make sure that the first descriptor of a
2865 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2867 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
2868 (size
> 2015) && count
== 0))
2871 /* Workaround for potential 82544 hang in PCI-X. Avoid
2872 * terminating buffers within evenly-aligned dwords.
2874 if (unlikely(adapter
->pcix_82544
&&
2875 !((unsigned long)(skb
->data
+ offset
+ size
- 1) & 4) &&
2879 buffer_info
->length
= size
;
2880 /* set time_stamp *before* dma to help avoid a possible race */
2881 buffer_info
->time_stamp
= jiffies
;
2882 buffer_info
->mapped_as_page
= false;
2883 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2885 size
, DMA_TO_DEVICE
);
2886 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2888 buffer_info
->next_to_watch
= i
;
2895 if (unlikely(i
== tx_ring
->count
))
2900 for (f
= 0; f
< nr_frags
; f
++) {
2901 const struct skb_frag_struct
*frag
;
2903 frag
= &skb_shinfo(skb
)->frags
[f
];
2904 len
= skb_frag_size(frag
);
2908 unsigned long bufend
;
2910 if (unlikely(i
== tx_ring
->count
))
2913 buffer_info
= &tx_ring
->buffer_info
[i
];
2914 size
= min(len
, max_per_txd
);
2915 /* Workaround for premature desc write-backs
2916 * in TSO mode. Append 4-byte sentinel desc
2918 if (unlikely(mss
&& f
== (nr_frags
-1) &&
2919 size
== len
&& size
> 8))
2921 /* Workaround for potential 82544 hang in PCI-X.
2922 * Avoid terminating buffers within evenly-aligned
2925 bufend
= (unsigned long)
2926 page_to_phys(skb_frag_page(frag
));
2927 bufend
+= offset
+ size
- 1;
2928 if (unlikely(adapter
->pcix_82544
&&
2933 buffer_info
->length
= size
;
2934 buffer_info
->time_stamp
= jiffies
;
2935 buffer_info
->mapped_as_page
= true;
2936 buffer_info
->dma
= skb_frag_dma_map(&pdev
->dev
, frag
,
2937 offset
, size
, DMA_TO_DEVICE
);
2938 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2940 buffer_info
->next_to_watch
= i
;
2948 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
2949 /* multiply data chunks by size of headers */
2950 bytecount
= ((segs
- 1) * skb_headlen(skb
)) + skb
->len
;
2952 tx_ring
->buffer_info
[i
].skb
= skb
;
2953 tx_ring
->buffer_info
[i
].segs
= segs
;
2954 tx_ring
->buffer_info
[i
].bytecount
= bytecount
;
2955 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2960 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2961 buffer_info
->dma
= 0;
2967 i
+= tx_ring
->count
;
2969 buffer_info
= &tx_ring
->buffer_info
[i
];
2970 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2976 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
2977 struct e1000_tx_ring
*tx_ring
, int tx_flags
,
2980 struct e1000_hw
*hw
= &adapter
->hw
;
2981 struct e1000_tx_desc
*tx_desc
= NULL
;
2982 struct e1000_buffer
*buffer_info
;
2983 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
2986 if (likely(tx_flags
& E1000_TX_FLAGS_TSO
)) {
2987 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
2989 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
2991 if (likely(tx_flags
& E1000_TX_FLAGS_IPV4
))
2992 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
2995 if (likely(tx_flags
& E1000_TX_FLAGS_CSUM
)) {
2996 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
2997 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3000 if (unlikely(tx_flags
& E1000_TX_FLAGS_VLAN
)) {
3001 txd_lower
|= E1000_TXD_CMD_VLE
;
3002 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
3005 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
3006 txd_lower
&= ~(E1000_TXD_CMD_IFCS
);
3008 i
= tx_ring
->next_to_use
;
3011 buffer_info
= &tx_ring
->buffer_info
[i
];
3012 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3013 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
3014 tx_desc
->lower
.data
=
3015 cpu_to_le32(txd_lower
| buffer_info
->length
);
3016 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
3017 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3020 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
3022 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3023 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
3024 tx_desc
->lower
.data
&= ~(cpu_to_le32(E1000_TXD_CMD_IFCS
));
3026 /* Force memory writes to complete before letting h/w
3027 * know there are new descriptors to fetch. (Only
3028 * applicable for weak-ordered memory model archs,
3033 tx_ring
->next_to_use
= i
;
3034 writel(i
, hw
->hw_addr
+ tx_ring
->tdt
);
3035 /* we need this if more than one processor can write to our tail
3036 * at a time, it synchronizes IO on IA64/Altix systems
3041 /* 82547 workaround to avoid controller hang in half-duplex environment.
3042 * The workaround is to avoid queuing a large packet that would span
3043 * the internal Tx FIFO ring boundary by notifying the stack to resend
3044 * the packet at a later time. This gives the Tx FIFO an opportunity to
3045 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3046 * to the beginning of the Tx FIFO.
3049 #define E1000_FIFO_HDR 0x10
3050 #define E1000_82547_PAD_LEN 0x3E0
3052 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
3053 struct sk_buff
*skb
)
3055 u32 fifo_space
= adapter
->tx_fifo_size
- adapter
->tx_fifo_head
;
3056 u32 skb_fifo_len
= skb
->len
+ E1000_FIFO_HDR
;
3058 skb_fifo_len
= ALIGN(skb_fifo_len
, E1000_FIFO_HDR
);
3060 if (adapter
->link_duplex
!= HALF_DUPLEX
)
3061 goto no_fifo_stall_required
;
3063 if (atomic_read(&adapter
->tx_fifo_stall
))
3066 if (skb_fifo_len
>= (E1000_82547_PAD_LEN
+ fifo_space
)) {
3067 atomic_set(&adapter
->tx_fifo_stall
, 1);
3071 no_fifo_stall_required
:
3072 adapter
->tx_fifo_head
+= skb_fifo_len
;
3073 if (adapter
->tx_fifo_head
>= adapter
->tx_fifo_size
)
3074 adapter
->tx_fifo_head
-= adapter
->tx_fifo_size
;
3078 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
3080 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3081 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3083 netif_stop_queue(netdev
);
3084 /* Herbert's original patch had:
3085 * smp_mb__after_netif_stop_queue();
3086 * but since that doesn't exist yet, just open code it.
3090 /* We need to check again in a case another CPU has just
3091 * made room available.
3093 if (likely(E1000_DESC_UNUSED(tx_ring
) < size
))
3097 netif_start_queue(netdev
);
3098 ++adapter
->restart_queue
;
3102 static int e1000_maybe_stop_tx(struct net_device
*netdev
,
3103 struct e1000_tx_ring
*tx_ring
, int size
)
3105 if (likely(E1000_DESC_UNUSED(tx_ring
) >= size
))
3107 return __e1000_maybe_stop_tx(netdev
, size
);
3110 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3111 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
3112 struct net_device
*netdev
)
3114 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3115 struct e1000_hw
*hw
= &adapter
->hw
;
3116 struct e1000_tx_ring
*tx_ring
;
3117 unsigned int first
, max_per_txd
= E1000_MAX_DATA_PER_TXD
;
3118 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
3119 unsigned int tx_flags
= 0;
3120 unsigned int len
= skb_headlen(skb
);
3121 unsigned int nr_frags
;
3127 /* This goes back to the question of how to logically map a Tx queue
3128 * to a flow. Right now, performance is impacted slightly negatively
3129 * if using multiple Tx queues. If the stack breaks away from a
3130 * single qdisc implementation, we can look at this again.
3132 tx_ring
= adapter
->tx_ring
;
3134 if (unlikely(skb
->len
<= 0)) {
3135 dev_kfree_skb_any(skb
);
3136 return NETDEV_TX_OK
;
3139 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN,
3140 * packets may get corrupted during padding by HW.
3141 * To WA this issue, pad all small packets manually.
3143 if (skb
->len
< ETH_ZLEN
) {
3144 if (skb_pad(skb
, ETH_ZLEN
- skb
->len
))
3145 return NETDEV_TX_OK
;
3146 skb
->len
= ETH_ZLEN
;
3147 skb_set_tail_pointer(skb
, ETH_ZLEN
);
3150 mss
= skb_shinfo(skb
)->gso_size
;
3151 /* The controller does a simple calculation to
3152 * make sure there is enough room in the FIFO before
3153 * initiating the DMA for each buffer. The calc is:
3154 * 4 = ceil(buffer len/mss). To make sure we don't
3155 * overrun the FIFO, adjust the max buffer len if mss
3160 max_per_txd
= min(mss
<< 2, max_per_txd
);
3161 max_txd_pwr
= fls(max_per_txd
) - 1;
3163 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3164 if (skb
->data_len
&& hdr_len
== len
) {
3165 switch (hw
->mac_type
) {
3166 unsigned int pull_size
;
3168 /* Make sure we have room to chop off 4 bytes,
3169 * and that the end alignment will work out to
3170 * this hardware's requirements
3171 * NOTE: this is a TSO only workaround
3172 * if end byte alignment not correct move us
3173 * into the next dword
3175 if ((unsigned long)(skb_tail_pointer(skb
) - 1)
3179 pull_size
= min((unsigned int)4, skb
->data_len
);
3180 if (!__pskb_pull_tail(skb
, pull_size
)) {
3181 e_err(drv
, "__pskb_pull_tail "
3183 dev_kfree_skb_any(skb
);
3184 return NETDEV_TX_OK
;
3186 len
= skb_headlen(skb
);
3195 /* reserve a descriptor for the offload context */
3196 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
3200 /* Controller Erratum workaround */
3201 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&& !skb_is_gso(skb
))
3204 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
3206 if (adapter
->pcix_82544
)
3209 /* work-around for errata 10 and it applies to all controllers
3210 * in PCI-X mode, so add one more descriptor to the count
3212 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
3216 nr_frags
= skb_shinfo(skb
)->nr_frags
;
3217 for (f
= 0; f
< nr_frags
; f
++)
3218 count
+= TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb
)->frags
[f
]),
3220 if (adapter
->pcix_82544
)
3223 /* need: count + 2 desc gap to keep tail from touching
3224 * head, otherwise try next time
3226 if (unlikely(e1000_maybe_stop_tx(netdev
, tx_ring
, count
+ 2)))
3227 return NETDEV_TX_BUSY
;
3229 if (unlikely((hw
->mac_type
== e1000_82547
) &&
3230 (e1000_82547_fifo_workaround(adapter
, skb
)))) {
3231 netif_stop_queue(netdev
);
3232 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3233 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
3234 return NETDEV_TX_BUSY
;
3237 if (vlan_tx_tag_present(skb
)) {
3238 tx_flags
|= E1000_TX_FLAGS_VLAN
;
3239 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
3242 first
= tx_ring
->next_to_use
;
3244 tso
= e1000_tso(adapter
, tx_ring
, skb
);
3246 dev_kfree_skb_any(skb
);
3247 return NETDEV_TX_OK
;
3251 if (likely(hw
->mac_type
!= e1000_82544
))
3252 tx_ring
->last_tx_tso
= true;
3253 tx_flags
|= E1000_TX_FLAGS_TSO
;
3254 } else if (likely(e1000_tx_csum(adapter
, tx_ring
, skb
)))
3255 tx_flags
|= E1000_TX_FLAGS_CSUM
;
3257 if (likely(skb
->protocol
== htons(ETH_P_IP
)))
3258 tx_flags
|= E1000_TX_FLAGS_IPV4
;
3260 if (unlikely(skb
->no_fcs
))
3261 tx_flags
|= E1000_TX_FLAGS_NO_FCS
;
3263 count
= e1000_tx_map(adapter
, tx_ring
, skb
, first
, max_per_txd
,
3267 netdev_sent_queue(netdev
, skb
->len
);
3268 skb_tx_timestamp(skb
);
3270 e1000_tx_queue(adapter
, tx_ring
, tx_flags
, count
);
3271 /* Make sure there is space in the ring for the next send. */
3272 e1000_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 2);
3275 dev_kfree_skb_any(skb
);
3276 tx_ring
->buffer_info
[first
].time_stamp
= 0;
3277 tx_ring
->next_to_use
= first
;
3280 return NETDEV_TX_OK
;
3283 #define NUM_REGS 38 /* 1 based count */
3284 static void e1000_regdump(struct e1000_adapter
*adapter
)
3286 struct e1000_hw
*hw
= &adapter
->hw
;
3288 u32
*regs_buff
= regs
;
3291 static const char * const reg_name
[] = {
3293 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3294 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3295 "TIDV", "TXDCTL", "TADV", "TARC0",
3296 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3298 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3299 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3300 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3303 regs_buff
[0] = er32(CTRL
);
3304 regs_buff
[1] = er32(STATUS
);
3306 regs_buff
[2] = er32(RCTL
);
3307 regs_buff
[3] = er32(RDLEN
);
3308 regs_buff
[4] = er32(RDH
);
3309 regs_buff
[5] = er32(RDT
);
3310 regs_buff
[6] = er32(RDTR
);
3312 regs_buff
[7] = er32(TCTL
);
3313 regs_buff
[8] = er32(TDBAL
);
3314 regs_buff
[9] = er32(TDBAH
);
3315 regs_buff
[10] = er32(TDLEN
);
3316 regs_buff
[11] = er32(TDH
);
3317 regs_buff
[12] = er32(TDT
);
3318 regs_buff
[13] = er32(TIDV
);
3319 regs_buff
[14] = er32(TXDCTL
);
3320 regs_buff
[15] = er32(TADV
);
3321 regs_buff
[16] = er32(TARC0
);
3323 regs_buff
[17] = er32(TDBAL1
);
3324 regs_buff
[18] = er32(TDBAH1
);
3325 regs_buff
[19] = er32(TDLEN1
);
3326 regs_buff
[20] = er32(TDH1
);
3327 regs_buff
[21] = er32(TDT1
);
3328 regs_buff
[22] = er32(TXDCTL1
);
3329 regs_buff
[23] = er32(TARC1
);
3330 regs_buff
[24] = er32(CTRL_EXT
);
3331 regs_buff
[25] = er32(ERT
);
3332 regs_buff
[26] = er32(RDBAL0
);
3333 regs_buff
[27] = er32(RDBAH0
);
3334 regs_buff
[28] = er32(TDFH
);
3335 regs_buff
[29] = er32(TDFT
);
3336 regs_buff
[30] = er32(TDFHS
);
3337 regs_buff
[31] = er32(TDFTS
);
3338 regs_buff
[32] = er32(TDFPC
);
3339 regs_buff
[33] = er32(RDFH
);
3340 regs_buff
[34] = er32(RDFT
);
3341 regs_buff
[35] = er32(RDFHS
);
3342 regs_buff
[36] = er32(RDFTS
);
3343 regs_buff
[37] = er32(RDFPC
);
3345 pr_info("Register dump\n");
3346 for (i
= 0; i
< NUM_REGS
; i
++)
3347 pr_info("%-15s %08x\n", reg_name
[i
], regs_buff
[i
]);
3351 * e1000_dump: Print registers, tx ring and rx ring
3353 static void e1000_dump(struct e1000_adapter
*adapter
)
3355 /* this code doesn't handle multiple rings */
3356 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3357 struct e1000_rx_ring
*rx_ring
= adapter
->rx_ring
;
3360 if (!netif_msg_hw(adapter
))
3363 /* Print Registers */
3364 e1000_regdump(adapter
);
3367 pr_info("TX Desc ring0 dump\n");
3369 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3371 * Legacy Transmit Descriptor
3372 * +--------------------------------------------------------------+
3373 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3374 * +--------------------------------------------------------------+
3375 * 8 | Special | CSS | Status | CMD | CSO | Length |
3376 * +--------------------------------------------------------------+
3377 * 63 48 47 36 35 32 31 24 23 16 15 0
3379 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3380 * 63 48 47 40 39 32 31 16 15 8 7 0
3381 * +----------------------------------------------------------------+
3382 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3383 * +----------------------------------------------------------------+
3384 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3385 * +----------------------------------------------------------------+
3386 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3388 * Extended Data Descriptor (DTYP=0x1)
3389 * +----------------------------------------------------------------+
3390 * 0 | Buffer Address [63:0] |
3391 * +----------------------------------------------------------------+
3392 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3393 * +----------------------------------------------------------------+
3394 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3396 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3397 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3399 if (!netif_msg_tx_done(adapter
))
3400 goto rx_ring_summary
;
3402 for (i
= 0; tx_ring
->desc
&& (i
< tx_ring
->count
); i
++) {
3403 struct e1000_tx_desc
*tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3404 struct e1000_buffer
*buffer_info
= &tx_ring
->buffer_info
[i
];
3405 struct my_u
{ __le64 a
; __le64 b
; };
3406 struct my_u
*u
= (struct my_u
*)tx_desc
;
3409 if (i
== tx_ring
->next_to_use
&& i
== tx_ring
->next_to_clean
)
3411 else if (i
== tx_ring
->next_to_use
)
3413 else if (i
== tx_ring
->next_to_clean
)
3418 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3419 ((le64_to_cpu(u
->b
) & (1<<20)) ? 'd' : 'c'), i
,
3420 le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3421 (u64
)buffer_info
->dma
, buffer_info
->length
,
3422 buffer_info
->next_to_watch
,
3423 (u64
)buffer_info
->time_stamp
, buffer_info
->skb
, type
);
3428 pr_info("\nRX Desc ring dump\n");
3430 /* Legacy Receive Descriptor Format
3432 * +-----------------------------------------------------+
3433 * | Buffer Address [63:0] |
3434 * +-----------------------------------------------------+
3435 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3436 * +-----------------------------------------------------+
3437 * 63 48 47 40 39 32 31 16 15 0
3439 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3441 if (!netif_msg_rx_status(adapter
))
3444 for (i
= 0; rx_ring
->desc
&& (i
< rx_ring
->count
); i
++) {
3445 struct e1000_rx_desc
*rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3446 struct e1000_buffer
*buffer_info
= &rx_ring
->buffer_info
[i
];
3447 struct my_u
{ __le64 a
; __le64 b
; };
3448 struct my_u
*u
= (struct my_u
*)rx_desc
;
3451 if (i
== rx_ring
->next_to_use
)
3453 else if (i
== rx_ring
->next_to_clean
)
3458 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3459 i
, le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3460 (u64
)buffer_info
->dma
, buffer_info
->skb
, type
);
3463 /* dump the descriptor caches */
3465 pr_info("Rx descriptor cache in 64bit format\n");
3466 for (i
= 0x6000; i
<= 0x63FF ; i
+= 0x10) {
3467 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3469 readl(adapter
->hw
.hw_addr
+ i
+4),
3470 readl(adapter
->hw
.hw_addr
+ i
),
3471 readl(adapter
->hw
.hw_addr
+ i
+12),
3472 readl(adapter
->hw
.hw_addr
+ i
+8));
3475 pr_info("Tx descriptor cache in 64bit format\n");
3476 for (i
= 0x7000; i
<= 0x73FF ; i
+= 0x10) {
3477 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3479 readl(adapter
->hw
.hw_addr
+ i
+4),
3480 readl(adapter
->hw
.hw_addr
+ i
),
3481 readl(adapter
->hw
.hw_addr
+ i
+12),
3482 readl(adapter
->hw
.hw_addr
+ i
+8));
3489 * e1000_tx_timeout - Respond to a Tx Hang
3490 * @netdev: network interface device structure
3492 static void e1000_tx_timeout(struct net_device
*netdev
)
3494 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3496 /* Do the reset outside of interrupt context */
3497 adapter
->tx_timeout_count
++;
3498 schedule_work(&adapter
->reset_task
);
3501 static void e1000_reset_task(struct work_struct
*work
)
3503 struct e1000_adapter
*adapter
=
3504 container_of(work
, struct e1000_adapter
, reset_task
);
3506 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
3508 e_err(drv
, "Reset adapter\n");
3509 e1000_reinit_safe(adapter
);
3513 * e1000_get_stats - Get System Network Statistics
3514 * @netdev: network interface device structure
3516 * Returns the address of the device statistics structure.
3517 * The statistics are actually updated from the watchdog.
3519 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
3521 /* only return the current stats */
3522 return &netdev
->stats
;
3526 * e1000_change_mtu - Change the Maximum Transfer Unit
3527 * @netdev: network interface device structure
3528 * @new_mtu: new value for maximum frame size
3530 * Returns 0 on success, negative on failure
3532 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
3534 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3535 struct e1000_hw
*hw
= &adapter
->hw
;
3536 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
3538 if ((max_frame
< MINIMUM_ETHERNET_FRAME_SIZE
) ||
3539 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3540 e_err(probe
, "Invalid MTU setting\n");
3544 /* Adapter-specific max frame size limits. */
3545 switch (hw
->mac_type
) {
3546 case e1000_undefined
... e1000_82542_rev2_1
:
3547 if (max_frame
> (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) {
3548 e_err(probe
, "Jumbo Frames not supported.\n");
3553 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3557 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
3559 /* e1000_down has a dependency on max_frame_size */
3560 hw
->max_frame_size
= max_frame
;
3561 if (netif_running(netdev
))
3562 e1000_down(adapter
);
3564 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3565 * means we reserve 2 more, this pushes us to allocate from the next
3567 * i.e. RXBUFFER_2048 --> size-4096 slab
3568 * however with the new *_jumbo_rx* routines, jumbo receives will use
3572 if (max_frame
<= E1000_RXBUFFER_2048
)
3573 adapter
->rx_buffer_len
= E1000_RXBUFFER_2048
;
3575 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3576 adapter
->rx_buffer_len
= E1000_RXBUFFER_16384
;
3577 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3578 adapter
->rx_buffer_len
= PAGE_SIZE
;
3581 /* adjust allocation if LPE protects us, and we aren't using SBP */
3582 if (!hw
->tbi_compatibility_on
&&
3583 ((max_frame
== (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) ||
3584 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
)))
3585 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3587 pr_info("%s changing MTU from %d to %d\n",
3588 netdev
->name
, netdev
->mtu
, new_mtu
);
3589 netdev
->mtu
= new_mtu
;
3591 if (netif_running(netdev
))
3594 e1000_reset(adapter
);
3596 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
3602 * e1000_update_stats - Update the board statistics counters
3603 * @adapter: board private structure
3605 void e1000_update_stats(struct e1000_adapter
*adapter
)
3607 struct net_device
*netdev
= adapter
->netdev
;
3608 struct e1000_hw
*hw
= &adapter
->hw
;
3609 struct pci_dev
*pdev
= adapter
->pdev
;
3610 unsigned long flags
;
3613 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3615 /* Prevent stats update while adapter is being reset, or if the pci
3616 * connection is down.
3618 if (adapter
->link_speed
== 0)
3620 if (pci_channel_offline(pdev
))
3623 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3625 /* these counters are modified from e1000_tbi_adjust_stats,
3626 * called from the interrupt context, so they must only
3627 * be written while holding adapter->stats_lock
3630 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3631 adapter
->stats
.gprc
+= er32(GPRC
);
3632 adapter
->stats
.gorcl
+= er32(GORCL
);
3633 adapter
->stats
.gorch
+= er32(GORCH
);
3634 adapter
->stats
.bprc
+= er32(BPRC
);
3635 adapter
->stats
.mprc
+= er32(MPRC
);
3636 adapter
->stats
.roc
+= er32(ROC
);
3638 adapter
->stats
.prc64
+= er32(PRC64
);
3639 adapter
->stats
.prc127
+= er32(PRC127
);
3640 adapter
->stats
.prc255
+= er32(PRC255
);
3641 adapter
->stats
.prc511
+= er32(PRC511
);
3642 adapter
->stats
.prc1023
+= er32(PRC1023
);
3643 adapter
->stats
.prc1522
+= er32(PRC1522
);
3645 adapter
->stats
.symerrs
+= er32(SYMERRS
);
3646 adapter
->stats
.mpc
+= er32(MPC
);
3647 adapter
->stats
.scc
+= er32(SCC
);
3648 adapter
->stats
.ecol
+= er32(ECOL
);
3649 adapter
->stats
.mcc
+= er32(MCC
);
3650 adapter
->stats
.latecol
+= er32(LATECOL
);
3651 adapter
->stats
.dc
+= er32(DC
);
3652 adapter
->stats
.sec
+= er32(SEC
);
3653 adapter
->stats
.rlec
+= er32(RLEC
);
3654 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3655 adapter
->stats
.xontxc
+= er32(XONTXC
);
3656 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3657 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3658 adapter
->stats
.fcruc
+= er32(FCRUC
);
3659 adapter
->stats
.gptc
+= er32(GPTC
);
3660 adapter
->stats
.gotcl
+= er32(GOTCL
);
3661 adapter
->stats
.gotch
+= er32(GOTCH
);
3662 adapter
->stats
.rnbc
+= er32(RNBC
);
3663 adapter
->stats
.ruc
+= er32(RUC
);
3664 adapter
->stats
.rfc
+= er32(RFC
);
3665 adapter
->stats
.rjc
+= er32(RJC
);
3666 adapter
->stats
.torl
+= er32(TORL
);
3667 adapter
->stats
.torh
+= er32(TORH
);
3668 adapter
->stats
.totl
+= er32(TOTL
);
3669 adapter
->stats
.toth
+= er32(TOTH
);
3670 adapter
->stats
.tpr
+= er32(TPR
);
3672 adapter
->stats
.ptc64
+= er32(PTC64
);
3673 adapter
->stats
.ptc127
+= er32(PTC127
);
3674 adapter
->stats
.ptc255
+= er32(PTC255
);
3675 adapter
->stats
.ptc511
+= er32(PTC511
);
3676 adapter
->stats
.ptc1023
+= er32(PTC1023
);
3677 adapter
->stats
.ptc1522
+= er32(PTC1522
);
3679 adapter
->stats
.mptc
+= er32(MPTC
);
3680 adapter
->stats
.bptc
+= er32(BPTC
);
3682 /* used for adaptive IFS */
3684 hw
->tx_packet_delta
= er32(TPT
);
3685 adapter
->stats
.tpt
+= hw
->tx_packet_delta
;
3686 hw
->collision_delta
= er32(COLC
);
3687 adapter
->stats
.colc
+= hw
->collision_delta
;
3689 if (hw
->mac_type
>= e1000_82543
) {
3690 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3691 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3692 adapter
->stats
.tncrs
+= er32(TNCRS
);
3693 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3694 adapter
->stats
.tsctc
+= er32(TSCTC
);
3695 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3698 /* Fill out the OS statistics structure */
3699 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3700 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3704 /* RLEC on some newer hardware can be incorrect so build
3705 * our own version based on RUC and ROC
3707 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3708 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3709 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3710 adapter
->stats
.cexterr
;
3711 adapter
->stats
.rlerrc
= adapter
->stats
.ruc
+ adapter
->stats
.roc
;
3712 netdev
->stats
.rx_length_errors
= adapter
->stats
.rlerrc
;
3713 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3714 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3715 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3718 adapter
->stats
.txerrc
= adapter
->stats
.ecol
+ adapter
->stats
.latecol
;
3719 netdev
->stats
.tx_errors
= adapter
->stats
.txerrc
;
3720 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3721 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3722 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3723 if (hw
->bad_tx_carr_stats_fd
&&
3724 adapter
->link_duplex
== FULL_DUPLEX
) {
3725 netdev
->stats
.tx_carrier_errors
= 0;
3726 adapter
->stats
.tncrs
= 0;
3729 /* Tx Dropped needs to be maintained elsewhere */
3732 if (hw
->media_type
== e1000_media_type_copper
) {
3733 if ((adapter
->link_speed
== SPEED_1000
) &&
3734 (!e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_tmp
))) {
3735 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3736 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3739 if ((hw
->mac_type
<= e1000_82546
) &&
3740 (hw
->phy_type
== e1000_phy_m88
) &&
3741 !e1000_read_phy_reg(hw
, M88E1000_RX_ERR_CNTR
, &phy_tmp
))
3742 adapter
->phy_stats
.receive_errors
+= phy_tmp
;
3745 /* Management Stats */
3746 if (hw
->has_smbus
) {
3747 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3748 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3749 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3752 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
3756 * e1000_intr - Interrupt Handler
3757 * @irq: interrupt number
3758 * @data: pointer to a network interface device structure
3760 static irqreturn_t
e1000_intr(int irq
, void *data
)
3762 struct net_device
*netdev
= data
;
3763 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3764 struct e1000_hw
*hw
= &adapter
->hw
;
3765 u32 icr
= er32(ICR
);
3767 if (unlikely((!icr
)))
3768 return IRQ_NONE
; /* Not our interrupt */
3770 /* we might have caused the interrupt, but the above
3771 * read cleared it, and just in case the driver is
3772 * down there is nothing to do so return handled
3774 if (unlikely(test_bit(__E1000_DOWN
, &adapter
->flags
)))
3777 if (unlikely(icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
))) {
3778 hw
->get_link_status
= 1;
3779 /* guard against interrupt when we're going down */
3780 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3781 schedule_delayed_work(&adapter
->watchdog_task
, 1);
3784 /* disable interrupts, without the synchronize_irq bit */
3786 E1000_WRITE_FLUSH();
3788 if (likely(napi_schedule_prep(&adapter
->napi
))) {
3789 adapter
->total_tx_bytes
= 0;
3790 adapter
->total_tx_packets
= 0;
3791 adapter
->total_rx_bytes
= 0;
3792 adapter
->total_rx_packets
= 0;
3793 __napi_schedule(&adapter
->napi
);
3795 /* this really should not happen! if it does it is basically a
3796 * bug, but not a hard error, so enable ints and continue
3798 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3799 e1000_irq_enable(adapter
);
3806 * e1000_clean - NAPI Rx polling callback
3807 * @adapter: board private structure
3809 static int e1000_clean(struct napi_struct
*napi
, int budget
)
3811 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
,
3813 int tx_clean_complete
= 0, work_done
= 0;
3815 tx_clean_complete
= e1000_clean_tx_irq(adapter
, &adapter
->tx_ring
[0]);
3817 adapter
->clean_rx(adapter
, &adapter
->rx_ring
[0], &work_done
, budget
);
3819 if (!tx_clean_complete
)
3822 /* If budget not fully consumed, exit the polling mode */
3823 if (work_done
< budget
) {
3824 if (likely(adapter
->itr_setting
& 3))
3825 e1000_set_itr(adapter
);
3826 napi_complete(napi
);
3827 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3828 e1000_irq_enable(adapter
);
3835 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3836 * @adapter: board private structure
3838 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
3839 struct e1000_tx_ring
*tx_ring
)
3841 struct e1000_hw
*hw
= &adapter
->hw
;
3842 struct net_device
*netdev
= adapter
->netdev
;
3843 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
3844 struct e1000_buffer
*buffer_info
;
3845 unsigned int i
, eop
;
3846 unsigned int count
= 0;
3847 unsigned int total_tx_bytes
=0, total_tx_packets
=0;
3848 unsigned int bytes_compl
= 0, pkts_compl
= 0;
3850 i
= tx_ring
->next_to_clean
;
3851 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3852 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3854 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3855 (count
< tx_ring
->count
)) {
3856 bool cleaned
= false;
3857 rmb(); /* read buffer_info after eop_desc */
3858 for ( ; !cleaned
; count
++) {
3859 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3860 buffer_info
= &tx_ring
->buffer_info
[i
];
3861 cleaned
= (i
== eop
);
3864 total_tx_packets
+= buffer_info
->segs
;
3865 total_tx_bytes
+= buffer_info
->bytecount
;
3866 if (buffer_info
->skb
) {
3867 bytes_compl
+= buffer_info
->skb
->len
;
3872 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
3873 tx_desc
->upper
.data
= 0;
3875 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3878 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3879 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3882 tx_ring
->next_to_clean
= i
;
3884 netdev_completed_queue(netdev
, pkts_compl
, bytes_compl
);
3886 #define TX_WAKE_THRESHOLD 32
3887 if (unlikely(count
&& netif_carrier_ok(netdev
) &&
3888 E1000_DESC_UNUSED(tx_ring
) >= TX_WAKE_THRESHOLD
)) {
3889 /* Make sure that anybody stopping the queue after this
3890 * sees the new next_to_clean.
3894 if (netif_queue_stopped(netdev
) &&
3895 !(test_bit(__E1000_DOWN
, &adapter
->flags
))) {
3896 netif_wake_queue(netdev
);
3897 ++adapter
->restart_queue
;
3901 if (adapter
->detect_tx_hung
) {
3902 /* Detect a transmit hang in hardware, this serializes the
3903 * check with the clearing of time_stamp and movement of i
3905 adapter
->detect_tx_hung
= false;
3906 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
3907 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+
3908 (adapter
->tx_timeout_factor
* HZ
)) &&
3909 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
3911 /* detected Tx unit hang */
3912 e_err(drv
, "Detected Tx Unit Hang\n"
3916 " next_to_use <%x>\n"
3917 " next_to_clean <%x>\n"
3918 "buffer_info[next_to_clean]\n"
3919 " time_stamp <%lx>\n"
3920 " next_to_watch <%x>\n"
3922 " next_to_watch.status <%x>\n",
3923 (unsigned long)((tx_ring
- adapter
->tx_ring
) /
3924 sizeof(struct e1000_tx_ring
)),
3925 readl(hw
->hw_addr
+ tx_ring
->tdh
),
3926 readl(hw
->hw_addr
+ tx_ring
->tdt
),
3927 tx_ring
->next_to_use
,
3928 tx_ring
->next_to_clean
,
3929 tx_ring
->buffer_info
[eop
].time_stamp
,
3932 eop_desc
->upper
.fields
.status
);
3933 e1000_dump(adapter
);
3934 netif_stop_queue(netdev
);
3937 adapter
->total_tx_bytes
+= total_tx_bytes
;
3938 adapter
->total_tx_packets
+= total_tx_packets
;
3939 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
3940 netdev
->stats
.tx_packets
+= total_tx_packets
;
3941 return count
< tx_ring
->count
;
3945 * e1000_rx_checksum - Receive Checksum Offload for 82543
3946 * @adapter: board private structure
3947 * @status_err: receive descriptor status and error fields
3948 * @csum: receive descriptor csum field
3949 * @sk_buff: socket buffer with received data
3951 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
3952 u32 csum
, struct sk_buff
*skb
)
3954 struct e1000_hw
*hw
= &adapter
->hw
;
3955 u16 status
= (u16
)status_err
;
3956 u8 errors
= (u8
)(status_err
>> 24);
3958 skb_checksum_none_assert(skb
);
3960 /* 82543 or newer only */
3961 if (unlikely(hw
->mac_type
< e1000_82543
)) return;
3962 /* Ignore Checksum bit is set */
3963 if (unlikely(status
& E1000_RXD_STAT_IXSM
)) return;
3964 /* TCP/UDP checksum error bit is set */
3965 if (unlikely(errors
& E1000_RXD_ERR_TCPE
)) {
3966 /* let the stack verify checksum errors */
3967 adapter
->hw_csum_err
++;
3970 /* TCP/UDP Checksum has not been calculated */
3971 if (!(status
& E1000_RXD_STAT_TCPCS
))
3974 /* It must be a TCP or UDP packet with a valid checksum */
3975 if (likely(status
& E1000_RXD_STAT_TCPCS
)) {
3976 /* TCP checksum is good */
3977 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3979 adapter
->hw_csum_good
++;
3983 * e1000_consume_page - helper function
3985 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
3990 skb
->data_len
+= length
;
3991 skb
->truesize
+= PAGE_SIZE
;
3995 * e1000_receive_skb - helper function to handle rx indications
3996 * @adapter: board private structure
3997 * @status: descriptor status field as written by hardware
3998 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3999 * @skb: pointer to sk_buff to be indicated to stack
4001 static void e1000_receive_skb(struct e1000_adapter
*adapter
, u8 status
,
4002 __le16 vlan
, struct sk_buff
*skb
)
4004 skb
->protocol
= eth_type_trans(skb
, adapter
->netdev
);
4006 if (status
& E1000_RXD_STAT_VP
) {
4007 u16 vid
= le16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
;
4009 __vlan_hwaccel_put_tag(skb
, vid
);
4011 napi_gro_receive(&adapter
->napi
, skb
);
4015 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4016 * @adapter: board private structure
4017 * @rx_ring: ring to clean
4018 * @work_done: amount of napi work completed this call
4019 * @work_to_do: max amount of work allowed for this call to do
4021 * the return value indicates whether actual cleaning was done, there
4022 * is no guarantee that everything was cleaned
4024 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
4025 struct e1000_rx_ring
*rx_ring
,
4026 int *work_done
, int work_to_do
)
4028 struct e1000_hw
*hw
= &adapter
->hw
;
4029 struct net_device
*netdev
= adapter
->netdev
;
4030 struct pci_dev
*pdev
= adapter
->pdev
;
4031 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4032 struct e1000_buffer
*buffer_info
, *next_buffer
;
4033 unsigned long irq_flags
;
4036 int cleaned_count
= 0;
4037 bool cleaned
= false;
4038 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4040 i
= rx_ring
->next_to_clean
;
4041 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4042 buffer_info
= &rx_ring
->buffer_info
[i
];
4044 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4045 struct sk_buff
*skb
;
4048 if (*work_done
>= work_to_do
)
4051 rmb(); /* read descriptor and rx_buffer_info after status DD */
4053 status
= rx_desc
->status
;
4054 skb
= buffer_info
->skb
;
4055 buffer_info
->skb
= NULL
;
4057 if (++i
== rx_ring
->count
) i
= 0;
4058 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4061 next_buffer
= &rx_ring
->buffer_info
[i
];
4065 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
4066 buffer_info
->length
, DMA_FROM_DEVICE
);
4067 buffer_info
->dma
= 0;
4069 length
= le16_to_cpu(rx_desc
->length
);
4071 /* errors is only valid for DD + EOP descriptors */
4072 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
4073 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
4077 mapped
= page_address(buffer_info
->page
);
4078 last_byte
= *(mapped
+ length
- 1);
4079 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4081 spin_lock_irqsave(&adapter
->stats_lock
,
4083 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4085 spin_unlock_irqrestore(&adapter
->stats_lock
,
4089 if (netdev
->features
& NETIF_F_RXALL
)
4091 /* recycle both page and skb */
4092 buffer_info
->skb
= skb
;
4093 /* an error means any chain goes out the window
4096 if (rx_ring
->rx_skb_top
)
4097 dev_kfree_skb(rx_ring
->rx_skb_top
);
4098 rx_ring
->rx_skb_top
= NULL
;
4103 #define rxtop rx_ring->rx_skb_top
4105 if (!(status
& E1000_RXD_STAT_EOP
)) {
4106 /* this descriptor is only the beginning (or middle) */
4108 /* this is the beginning of a chain */
4110 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
4113 /* this is the middle of a chain */
4114 skb_fill_page_desc(rxtop
,
4115 skb_shinfo(rxtop
)->nr_frags
,
4116 buffer_info
->page
, 0, length
);
4117 /* re-use the skb, only consumed the page */
4118 buffer_info
->skb
= skb
;
4120 e1000_consume_page(buffer_info
, rxtop
, length
);
4124 /* end of the chain */
4125 skb_fill_page_desc(rxtop
,
4126 skb_shinfo(rxtop
)->nr_frags
,
4127 buffer_info
->page
, 0, length
);
4128 /* re-use the current skb, we only consumed the
4131 buffer_info
->skb
= skb
;
4134 e1000_consume_page(buffer_info
, skb
, length
);
4136 /* no chain, got EOP, this buf is the packet
4137 * copybreak to save the put_page/alloc_page
4139 if (length
<= copybreak
&&
4140 skb_tailroom(skb
) >= length
) {
4142 vaddr
= kmap_atomic(buffer_info
->page
);
4143 memcpy(skb_tail_pointer(skb
), vaddr
,
4145 kunmap_atomic(vaddr
);
4146 /* re-use the page, so don't erase
4149 skb_put(skb
, length
);
4151 skb_fill_page_desc(skb
, 0,
4152 buffer_info
->page
, 0,
4154 e1000_consume_page(buffer_info
, skb
,
4160 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4161 e1000_rx_checksum(adapter
,
4163 ((u32
)(rx_desc
->errors
) << 24),
4164 le16_to_cpu(rx_desc
->csum
), skb
);
4166 total_rx_bytes
+= (skb
->len
- 4); /* don't count FCS */
4167 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4168 pskb_trim(skb
, skb
->len
- 4);
4171 /* eth type trans needs skb->data to point to something */
4172 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
4173 e_err(drv
, "pskb_may_pull failed.\n");
4178 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4181 rx_desc
->status
= 0;
4183 /* return some buffers to hardware, one at a time is too slow */
4184 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4185 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4189 /* use prefetched values */
4191 buffer_info
= next_buffer
;
4193 rx_ring
->next_to_clean
= i
;
4195 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4197 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4199 adapter
->total_rx_packets
+= total_rx_packets
;
4200 adapter
->total_rx_bytes
+= total_rx_bytes
;
4201 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4202 netdev
->stats
.rx_packets
+= total_rx_packets
;
4206 /* this should improve performance for small packets with large amounts
4207 * of reassembly being done in the stack
4209 static void e1000_check_copybreak(struct net_device
*netdev
,
4210 struct e1000_buffer
*buffer_info
,
4211 u32 length
, struct sk_buff
**skb
)
4213 struct sk_buff
*new_skb
;
4215 if (length
> copybreak
)
4218 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
4222 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
4223 (*skb
)->data
- NET_IP_ALIGN
,
4224 length
+ NET_IP_ALIGN
);
4225 /* save the skb in buffer_info as good */
4226 buffer_info
->skb
= *skb
;
4231 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4232 * @adapter: board private structure
4233 * @rx_ring: ring to clean
4234 * @work_done: amount of napi work completed this call
4235 * @work_to_do: max amount of work allowed for this call to do
4237 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
4238 struct e1000_rx_ring
*rx_ring
,
4239 int *work_done
, int work_to_do
)
4241 struct e1000_hw
*hw
= &adapter
->hw
;
4242 struct net_device
*netdev
= adapter
->netdev
;
4243 struct pci_dev
*pdev
= adapter
->pdev
;
4244 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4245 struct e1000_buffer
*buffer_info
, *next_buffer
;
4246 unsigned long flags
;
4249 int cleaned_count
= 0;
4250 bool cleaned
= false;
4251 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4253 i
= rx_ring
->next_to_clean
;
4254 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4255 buffer_info
= &rx_ring
->buffer_info
[i
];
4257 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4258 struct sk_buff
*skb
;
4261 if (*work_done
>= work_to_do
)
4264 rmb(); /* read descriptor and rx_buffer_info after status DD */
4266 status
= rx_desc
->status
;
4267 skb
= buffer_info
->skb
;
4268 buffer_info
->skb
= NULL
;
4270 prefetch(skb
->data
- NET_IP_ALIGN
);
4272 if (++i
== rx_ring
->count
) i
= 0;
4273 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4276 next_buffer
= &rx_ring
->buffer_info
[i
];
4280 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4281 buffer_info
->length
, DMA_FROM_DEVICE
);
4282 buffer_info
->dma
= 0;
4284 length
= le16_to_cpu(rx_desc
->length
);
4285 /* !EOP means multiple descriptors were used to store a single
4286 * packet, if thats the case we need to toss it. In fact, we
4287 * to toss every packet with the EOP bit clear and the next
4288 * frame that _does_ have the EOP bit set, as it is by
4289 * definition only a frame fragment
4291 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
4292 adapter
->discarding
= true;
4294 if (adapter
->discarding
) {
4295 /* All receives must fit into a single buffer */
4296 e_dbg("Receive packet consumed multiple buffers\n");
4298 buffer_info
->skb
= skb
;
4299 if (status
& E1000_RXD_STAT_EOP
)
4300 adapter
->discarding
= false;
4304 if (unlikely(rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
)) {
4305 u8 last_byte
= *(skb
->data
+ length
- 1);
4306 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4308 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4309 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4311 spin_unlock_irqrestore(&adapter
->stats_lock
,
4315 if (netdev
->features
& NETIF_F_RXALL
)
4318 buffer_info
->skb
= skb
;
4324 total_rx_bytes
+= (length
- 4); /* don't count FCS */
4327 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4328 /* adjust length to remove Ethernet CRC, this must be
4329 * done after the TBI_ACCEPT workaround above
4333 e1000_check_copybreak(netdev
, buffer_info
, length
, &skb
);
4335 skb_put(skb
, length
);
4337 /* Receive Checksum Offload */
4338 e1000_rx_checksum(adapter
,
4340 ((u32
)(rx_desc
->errors
) << 24),
4341 le16_to_cpu(rx_desc
->csum
), skb
);
4343 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4346 rx_desc
->status
= 0;
4348 /* return some buffers to hardware, one at a time is too slow */
4349 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4350 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4354 /* use prefetched values */
4356 buffer_info
= next_buffer
;
4358 rx_ring
->next_to_clean
= i
;
4360 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4362 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4364 adapter
->total_rx_packets
+= total_rx_packets
;
4365 adapter
->total_rx_bytes
+= total_rx_bytes
;
4366 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4367 netdev
->stats
.rx_packets
+= total_rx_packets
;
4372 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4373 * @adapter: address of board private structure
4374 * @rx_ring: pointer to receive ring structure
4375 * @cleaned_count: number of buffers to allocate this pass
4378 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
4379 struct e1000_rx_ring
*rx_ring
, int cleaned_count
)
4381 struct net_device
*netdev
= adapter
->netdev
;
4382 struct pci_dev
*pdev
= adapter
->pdev
;
4383 struct e1000_rx_desc
*rx_desc
;
4384 struct e1000_buffer
*buffer_info
;
4385 struct sk_buff
*skb
;
4387 unsigned int bufsz
= 256 - 16 /*for skb_reserve */ ;
4389 i
= rx_ring
->next_to_use
;
4390 buffer_info
= &rx_ring
->buffer_info
[i
];
4392 while (cleaned_count
--) {
4393 skb
= buffer_info
->skb
;
4399 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4400 if (unlikely(!skb
)) {
4401 /* Better luck next round */
4402 adapter
->alloc_rx_buff_failed
++;
4406 buffer_info
->skb
= skb
;
4407 buffer_info
->length
= adapter
->rx_buffer_len
;
4409 /* allocate a new page if necessary */
4410 if (!buffer_info
->page
) {
4411 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4412 if (unlikely(!buffer_info
->page
)) {
4413 adapter
->alloc_rx_buff_failed
++;
4418 if (!buffer_info
->dma
) {
4419 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
4420 buffer_info
->page
, 0,
4421 buffer_info
->length
,
4423 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4424 put_page(buffer_info
->page
);
4426 buffer_info
->page
= NULL
;
4427 buffer_info
->skb
= NULL
;
4428 buffer_info
->dma
= 0;
4429 adapter
->alloc_rx_buff_failed
++;
4430 break; /* while !buffer_info->skb */
4434 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4435 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4437 if (unlikely(++i
== rx_ring
->count
))
4439 buffer_info
= &rx_ring
->buffer_info
[i
];
4442 if (likely(rx_ring
->next_to_use
!= i
)) {
4443 rx_ring
->next_to_use
= i
;
4444 if (unlikely(i
-- == 0))
4445 i
= (rx_ring
->count
- 1);
4447 /* Force memory writes to complete before letting h/w
4448 * know there are new descriptors to fetch. (Only
4449 * applicable for weak-ordered memory model archs,
4453 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->rdt
);
4458 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4459 * @adapter: address of board private structure
4461 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
4462 struct e1000_rx_ring
*rx_ring
,
4465 struct e1000_hw
*hw
= &adapter
->hw
;
4466 struct net_device
*netdev
= adapter
->netdev
;
4467 struct pci_dev
*pdev
= adapter
->pdev
;
4468 struct e1000_rx_desc
*rx_desc
;
4469 struct e1000_buffer
*buffer_info
;
4470 struct sk_buff
*skb
;
4472 unsigned int bufsz
= adapter
->rx_buffer_len
;
4474 i
= rx_ring
->next_to_use
;
4475 buffer_info
= &rx_ring
->buffer_info
[i
];
4477 while (cleaned_count
--) {
4478 skb
= buffer_info
->skb
;
4484 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4485 if (unlikely(!skb
)) {
4486 /* Better luck next round */
4487 adapter
->alloc_rx_buff_failed
++;
4491 /* Fix for errata 23, can't cross 64kB boundary */
4492 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4493 struct sk_buff
*oldskb
= skb
;
4494 e_err(rx_err
, "skb align check failed: %u bytes at "
4495 "%p\n", bufsz
, skb
->data
);
4496 /* Try again, without freeing the previous */
4497 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4498 /* Failed allocation, critical failure */
4500 dev_kfree_skb(oldskb
);
4501 adapter
->alloc_rx_buff_failed
++;
4505 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4508 dev_kfree_skb(oldskb
);
4509 adapter
->alloc_rx_buff_failed
++;
4510 break; /* while !buffer_info->skb */
4513 /* Use new allocation */
4514 dev_kfree_skb(oldskb
);
4516 buffer_info
->skb
= skb
;
4517 buffer_info
->length
= adapter
->rx_buffer_len
;
4519 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4521 buffer_info
->length
,
4523 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4525 buffer_info
->skb
= NULL
;
4526 buffer_info
->dma
= 0;
4527 adapter
->alloc_rx_buff_failed
++;
4528 break; /* while !buffer_info->skb */
4531 /* XXX if it was allocated cleanly it will never map to a
4535 /* Fix for errata 23, can't cross 64kB boundary */
4536 if (!e1000_check_64k_bound(adapter
,
4537 (void *)(unsigned long)buffer_info
->dma
,
4538 adapter
->rx_buffer_len
)) {
4539 e_err(rx_err
, "dma align check failed: %u bytes at "
4540 "%p\n", adapter
->rx_buffer_len
,
4541 (void *)(unsigned long)buffer_info
->dma
);
4543 buffer_info
->skb
= NULL
;
4545 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4546 adapter
->rx_buffer_len
,
4548 buffer_info
->dma
= 0;
4550 adapter
->alloc_rx_buff_failed
++;
4551 break; /* while !buffer_info->skb */
4553 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4554 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4556 if (unlikely(++i
== rx_ring
->count
))
4558 buffer_info
= &rx_ring
->buffer_info
[i
];
4561 if (likely(rx_ring
->next_to_use
!= i
)) {
4562 rx_ring
->next_to_use
= i
;
4563 if (unlikely(i
-- == 0))
4564 i
= (rx_ring
->count
- 1);
4566 /* Force memory writes to complete before letting h/w
4567 * know there are new descriptors to fetch. (Only
4568 * applicable for weak-ordered memory model archs,
4572 writel(i
, hw
->hw_addr
+ rx_ring
->rdt
);
4577 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4580 static void e1000_smartspeed(struct e1000_adapter
*adapter
)
4582 struct e1000_hw
*hw
= &adapter
->hw
;
4586 if ((hw
->phy_type
!= e1000_phy_igp
) || !hw
->autoneg
||
4587 !(hw
->autoneg_advertised
& ADVERTISE_1000_FULL
))
4590 if (adapter
->smartspeed
== 0) {
4591 /* If Master/Slave config fault is asserted twice,
4592 * we assume back-to-back
4594 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4595 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4596 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4597 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4598 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4599 if (phy_ctrl
& CR_1000T_MS_ENABLE
) {
4600 phy_ctrl
&= ~CR_1000T_MS_ENABLE
;
4601 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
,
4603 adapter
->smartspeed
++;
4604 if (!e1000_phy_setup_autoneg(hw
) &&
4605 !e1000_read_phy_reg(hw
, PHY_CTRL
,
4607 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4608 MII_CR_RESTART_AUTO_NEG
);
4609 e1000_write_phy_reg(hw
, PHY_CTRL
,
4614 } else if (adapter
->smartspeed
== E1000_SMARTSPEED_DOWNSHIFT
) {
4615 /* If still no link, perhaps using 2/3 pair cable */
4616 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4617 phy_ctrl
|= CR_1000T_MS_ENABLE
;
4618 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
, phy_ctrl
);
4619 if (!e1000_phy_setup_autoneg(hw
) &&
4620 !e1000_read_phy_reg(hw
, PHY_CTRL
, &phy_ctrl
)) {
4621 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4622 MII_CR_RESTART_AUTO_NEG
);
4623 e1000_write_phy_reg(hw
, PHY_CTRL
, phy_ctrl
);
4626 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4627 if (adapter
->smartspeed
++ == E1000_SMARTSPEED_MAX
)
4628 adapter
->smartspeed
= 0;
4637 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4643 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4655 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4658 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4659 struct e1000_hw
*hw
= &adapter
->hw
;
4660 struct mii_ioctl_data
*data
= if_mii(ifr
);
4663 unsigned long flags
;
4665 if (hw
->media_type
!= e1000_media_type_copper
)
4670 data
->phy_id
= hw
->phy_addr
;
4673 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4674 if (e1000_read_phy_reg(hw
, data
->reg_num
& 0x1F,
4676 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4679 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4682 if (data
->reg_num
& ~(0x1F))
4684 mii_reg
= data
->val_in
;
4685 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4686 if (e1000_write_phy_reg(hw
, data
->reg_num
,
4688 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4691 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4692 if (hw
->media_type
== e1000_media_type_copper
) {
4693 switch (data
->reg_num
) {
4695 if (mii_reg
& MII_CR_POWER_DOWN
)
4697 if (mii_reg
& MII_CR_AUTO_NEG_EN
) {
4699 hw
->autoneg_advertised
= 0x2F;
4704 else if (mii_reg
& 0x2000)
4708 retval
= e1000_set_spd_dplx(
4716 if (netif_running(adapter
->netdev
))
4717 e1000_reinit_locked(adapter
);
4719 e1000_reset(adapter
);
4721 case M88E1000_PHY_SPEC_CTRL
:
4722 case M88E1000_EXT_PHY_SPEC_CTRL
:
4723 if (e1000_phy_reset(hw
))
4728 switch (data
->reg_num
) {
4730 if (mii_reg
& MII_CR_POWER_DOWN
)
4732 if (netif_running(adapter
->netdev
))
4733 e1000_reinit_locked(adapter
);
4735 e1000_reset(adapter
);
4743 return E1000_SUCCESS
;
4746 void e1000_pci_set_mwi(struct e1000_hw
*hw
)
4748 struct e1000_adapter
*adapter
= hw
->back
;
4749 int ret_val
= pci_set_mwi(adapter
->pdev
);
4752 e_err(probe
, "Error in setting MWI\n");
4755 void e1000_pci_clear_mwi(struct e1000_hw
*hw
)
4757 struct e1000_adapter
*adapter
= hw
->back
;
4759 pci_clear_mwi(adapter
->pdev
);
4762 int e1000_pcix_get_mmrbc(struct e1000_hw
*hw
)
4764 struct e1000_adapter
*adapter
= hw
->back
;
4765 return pcix_get_mmrbc(adapter
->pdev
);
4768 void e1000_pcix_set_mmrbc(struct e1000_hw
*hw
, int mmrbc
)
4770 struct e1000_adapter
*adapter
= hw
->back
;
4771 pcix_set_mmrbc(adapter
->pdev
, mmrbc
);
4774 void e1000_io_write(struct e1000_hw
*hw
, unsigned long port
, u32 value
)
4779 static bool e1000_vlan_used(struct e1000_adapter
*adapter
)
4783 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4788 static void __e1000_vlan_mode(struct e1000_adapter
*adapter
,
4789 netdev_features_t features
)
4791 struct e1000_hw
*hw
= &adapter
->hw
;
4795 if (features
& NETIF_F_HW_VLAN_RX
) {
4796 /* enable VLAN tag insert/strip */
4797 ctrl
|= E1000_CTRL_VME
;
4799 /* disable VLAN tag insert/strip */
4800 ctrl
&= ~E1000_CTRL_VME
;
4804 static void e1000_vlan_filter_on_off(struct e1000_adapter
*adapter
,
4807 struct e1000_hw
*hw
= &adapter
->hw
;
4810 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4811 e1000_irq_disable(adapter
);
4813 __e1000_vlan_mode(adapter
, adapter
->netdev
->features
);
4815 /* enable VLAN receive filtering */
4817 rctl
&= ~E1000_RCTL_CFIEN
;
4818 if (!(adapter
->netdev
->flags
& IFF_PROMISC
))
4819 rctl
|= E1000_RCTL_VFE
;
4821 e1000_update_mng_vlan(adapter
);
4823 /* disable VLAN receive filtering */
4825 rctl
&= ~E1000_RCTL_VFE
;
4829 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4830 e1000_irq_enable(adapter
);
4833 static void e1000_vlan_mode(struct net_device
*netdev
,
4834 netdev_features_t features
)
4836 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4838 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4839 e1000_irq_disable(adapter
);
4841 __e1000_vlan_mode(adapter
, features
);
4843 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4844 e1000_irq_enable(adapter
);
4847 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4849 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4850 struct e1000_hw
*hw
= &adapter
->hw
;
4853 if ((hw
->mng_cookie
.status
&
4854 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
4855 (vid
== adapter
->mng_vlan_id
))
4858 if (!e1000_vlan_used(adapter
))
4859 e1000_vlan_filter_on_off(adapter
, true);
4861 /* add VID to filter table */
4862 index
= (vid
>> 5) & 0x7F;
4863 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4864 vfta
|= (1 << (vid
& 0x1F));
4865 e1000_write_vfta(hw
, index
, vfta
);
4867 set_bit(vid
, adapter
->active_vlans
);
4872 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4874 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4875 struct e1000_hw
*hw
= &adapter
->hw
;
4878 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4879 e1000_irq_disable(adapter
);
4880 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4881 e1000_irq_enable(adapter
);
4883 /* remove VID from filter table */
4884 index
= (vid
>> 5) & 0x7F;
4885 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4886 vfta
&= ~(1 << (vid
& 0x1F));
4887 e1000_write_vfta(hw
, index
, vfta
);
4889 clear_bit(vid
, adapter
->active_vlans
);
4891 if (!e1000_vlan_used(adapter
))
4892 e1000_vlan_filter_on_off(adapter
, false);
4897 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
4901 if (!e1000_vlan_used(adapter
))
4904 e1000_vlan_filter_on_off(adapter
, true);
4905 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4906 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
4909 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u32 spd
, u8 dplx
)
4911 struct e1000_hw
*hw
= &adapter
->hw
;
4915 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4916 * for the switch() below to work
4918 if ((spd
& 1) || (dplx
& ~1))
4921 /* Fiber NICs only allow 1000 gbps Full duplex */
4922 if ((hw
->media_type
== e1000_media_type_fiber
) &&
4923 spd
!= SPEED_1000
&&
4924 dplx
!= DUPLEX_FULL
)
4927 switch (spd
+ dplx
) {
4928 case SPEED_10
+ DUPLEX_HALF
:
4929 hw
->forced_speed_duplex
= e1000_10_half
;
4931 case SPEED_10
+ DUPLEX_FULL
:
4932 hw
->forced_speed_duplex
= e1000_10_full
;
4934 case SPEED_100
+ DUPLEX_HALF
:
4935 hw
->forced_speed_duplex
= e1000_100_half
;
4937 case SPEED_100
+ DUPLEX_FULL
:
4938 hw
->forced_speed_duplex
= e1000_100_full
;
4940 case SPEED_1000
+ DUPLEX_FULL
:
4942 hw
->autoneg_advertised
= ADVERTISE_1000_FULL
;
4944 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4949 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */
4950 hw
->mdix
= AUTO_ALL_MODES
;
4955 e_err(probe
, "Unsupported Speed/Duplex configuration\n");
4959 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4961 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4962 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4963 struct e1000_hw
*hw
= &adapter
->hw
;
4964 u32 ctrl
, ctrl_ext
, rctl
, status
;
4965 u32 wufc
= adapter
->wol
;
4970 netif_device_detach(netdev
);
4972 if (netif_running(netdev
)) {
4973 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
4974 e1000_down(adapter
);
4978 retval
= pci_save_state(pdev
);
4983 status
= er32(STATUS
);
4984 if (status
& E1000_STATUS_LU
)
4985 wufc
&= ~E1000_WUFC_LNKC
;
4988 e1000_setup_rctl(adapter
);
4989 e1000_set_rx_mode(netdev
);
4993 /* turn on all-multi mode if wake on multicast is enabled */
4994 if (wufc
& E1000_WUFC_MC
)
4995 rctl
|= E1000_RCTL_MPE
;
4997 /* enable receives in the hardware */
4998 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
5000 if (hw
->mac_type
>= e1000_82540
) {
5002 /* advertise wake from D3Cold */
5003 #define E1000_CTRL_ADVD3WUC 0x00100000
5004 /* phy power management enable */
5005 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5006 ctrl
|= E1000_CTRL_ADVD3WUC
|
5007 E1000_CTRL_EN_PHY_PWR_MGMT
;
5011 if (hw
->media_type
== e1000_media_type_fiber
||
5012 hw
->media_type
== e1000_media_type_internal_serdes
) {
5013 /* keep the laser running in D3 */
5014 ctrl_ext
= er32(CTRL_EXT
);
5015 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
5016 ew32(CTRL_EXT
, ctrl_ext
);
5019 ew32(WUC
, E1000_WUC_PME_EN
);
5026 e1000_release_manageability(adapter
);
5028 *enable_wake
= !!wufc
;
5030 /* make sure adapter isn't asleep if manageability is enabled */
5031 if (adapter
->en_mng_pt
)
5032 *enable_wake
= true;
5034 if (netif_running(netdev
))
5035 e1000_free_irq(adapter
);
5037 pci_disable_device(pdev
);
5043 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5048 retval
= __e1000_shutdown(pdev
, &wake
);
5053 pci_prepare_to_sleep(pdev
);
5055 pci_wake_from_d3(pdev
, false);
5056 pci_set_power_state(pdev
, PCI_D3hot
);
5062 static int e1000_resume(struct pci_dev
*pdev
)
5064 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5065 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5066 struct e1000_hw
*hw
= &adapter
->hw
;
5069 pci_set_power_state(pdev
, PCI_D0
);
5070 pci_restore_state(pdev
);
5071 pci_save_state(pdev
);
5073 if (adapter
->need_ioport
)
5074 err
= pci_enable_device(pdev
);
5076 err
= pci_enable_device_mem(pdev
);
5078 pr_err("Cannot enable PCI device from suspend\n");
5081 pci_set_master(pdev
);
5083 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5084 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5086 if (netif_running(netdev
)) {
5087 err
= e1000_request_irq(adapter
);
5092 e1000_power_up_phy(adapter
);
5093 e1000_reset(adapter
);
5096 e1000_init_manageability(adapter
);
5098 if (netif_running(netdev
))
5101 netif_device_attach(netdev
);
5107 static void e1000_shutdown(struct pci_dev
*pdev
)
5111 __e1000_shutdown(pdev
, &wake
);
5113 if (system_state
== SYSTEM_POWER_OFF
) {
5114 pci_wake_from_d3(pdev
, wake
);
5115 pci_set_power_state(pdev
, PCI_D3hot
);
5119 #ifdef CONFIG_NET_POLL_CONTROLLER
5120 /* Polling 'interrupt' - used by things like netconsole to send skbs
5121 * without having to re-enable interrupts. It's not called while
5122 * the interrupt routine is executing.
5124 static void e1000_netpoll(struct net_device
*netdev
)
5126 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5128 disable_irq(adapter
->pdev
->irq
);
5129 e1000_intr(adapter
->pdev
->irq
, netdev
);
5130 enable_irq(adapter
->pdev
->irq
);
5135 * e1000_io_error_detected - called when PCI error is detected
5136 * @pdev: Pointer to PCI device
5137 * @state: The current pci connection state
5139 * This function is called after a PCI bus error affecting
5140 * this device has been detected.
5142 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
5143 pci_channel_state_t state
)
5145 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5146 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5148 netif_device_detach(netdev
);
5150 if (state
== pci_channel_io_perm_failure
)
5151 return PCI_ERS_RESULT_DISCONNECT
;
5153 if (netif_running(netdev
))
5154 e1000_down(adapter
);
5155 pci_disable_device(pdev
);
5157 /* Request a slot slot reset. */
5158 return PCI_ERS_RESULT_NEED_RESET
;
5162 * e1000_io_slot_reset - called after the pci bus has been reset.
5163 * @pdev: Pointer to PCI device
5165 * Restart the card from scratch, as if from a cold-boot. Implementation
5166 * resembles the first-half of the e1000_resume routine.
5168 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
5170 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5171 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5172 struct e1000_hw
*hw
= &adapter
->hw
;
5175 if (adapter
->need_ioport
)
5176 err
= pci_enable_device(pdev
);
5178 err
= pci_enable_device_mem(pdev
);
5180 pr_err("Cannot re-enable PCI device after reset.\n");
5181 return PCI_ERS_RESULT_DISCONNECT
;
5183 pci_set_master(pdev
);
5185 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5186 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5188 e1000_reset(adapter
);
5191 return PCI_ERS_RESULT_RECOVERED
;
5195 * e1000_io_resume - called when traffic can start flowing again.
5196 * @pdev: Pointer to PCI device
5198 * This callback is called when the error recovery driver tells us that
5199 * its OK to resume normal operation. Implementation resembles the
5200 * second-half of the e1000_resume routine.
5202 static void e1000_io_resume(struct pci_dev
*pdev
)
5204 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5205 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5207 e1000_init_manageability(adapter
);
5209 if (netif_running(netdev
)) {
5210 if (e1000_up(adapter
)) {
5211 pr_info("can't bring device back up after reset\n");
5216 netif_device_attach(netdev
);