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 __devexit
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 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
= __devexit_p(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.
243 static int __init
e1000_init_module(void)
246 pr_info("%s - version %s\n", e1000_driver_string
, e1000_driver_version
);
248 pr_info("%s\n", e1000_copyright
);
250 ret
= pci_register_driver(&e1000_driver
);
251 if (copybreak
!= COPYBREAK_DEFAULT
) {
253 pr_info("copybreak disabled\n");
255 pr_info("copybreak enabled for "
256 "packets <= %u bytes\n", copybreak
);
261 module_init(e1000_init_module
);
264 * e1000_exit_module - Driver Exit Cleanup Routine
266 * e1000_exit_module is called just before the driver is removed
270 static void __exit
e1000_exit_module(void)
272 pci_unregister_driver(&e1000_driver
);
275 module_exit(e1000_exit_module
);
277 static int e1000_request_irq(struct e1000_adapter
*adapter
)
279 struct net_device
*netdev
= adapter
->netdev
;
280 irq_handler_t handler
= e1000_intr
;
281 int irq_flags
= IRQF_SHARED
;
284 err
= request_irq(adapter
->pdev
->irq
, handler
, irq_flags
, netdev
->name
,
287 e_err(probe
, "Unable to allocate interrupt Error: %d\n", err
);
293 static void e1000_free_irq(struct e1000_adapter
*adapter
)
295 struct net_device
*netdev
= adapter
->netdev
;
297 free_irq(adapter
->pdev
->irq
, netdev
);
301 * e1000_irq_disable - Mask off interrupt generation on the NIC
302 * @adapter: board private structure
305 static void e1000_irq_disable(struct e1000_adapter
*adapter
)
307 struct e1000_hw
*hw
= &adapter
->hw
;
311 synchronize_irq(adapter
->pdev
->irq
);
315 * e1000_irq_enable - Enable default interrupt generation settings
316 * @adapter: board private structure
319 static void e1000_irq_enable(struct e1000_adapter
*adapter
)
321 struct e1000_hw
*hw
= &adapter
->hw
;
323 ew32(IMS
, IMS_ENABLE_MASK
);
327 static void e1000_update_mng_vlan(struct e1000_adapter
*adapter
)
329 struct e1000_hw
*hw
= &adapter
->hw
;
330 struct net_device
*netdev
= adapter
->netdev
;
331 u16 vid
= hw
->mng_cookie
.vlan_id
;
332 u16 old_vid
= adapter
->mng_vlan_id
;
334 if (!e1000_vlan_used(adapter
))
337 if (!test_bit(vid
, adapter
->active_vlans
)) {
338 if (hw
->mng_cookie
.status
&
339 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) {
340 e1000_vlan_rx_add_vid(netdev
, vid
);
341 adapter
->mng_vlan_id
= vid
;
343 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
345 if ((old_vid
!= (u16
)E1000_MNG_VLAN_NONE
) &&
347 !test_bit(old_vid
, adapter
->active_vlans
))
348 e1000_vlan_rx_kill_vid(netdev
, old_vid
);
350 adapter
->mng_vlan_id
= vid
;
354 static void e1000_init_manageability(struct e1000_adapter
*adapter
)
356 struct e1000_hw
*hw
= &adapter
->hw
;
358 if (adapter
->en_mng_pt
) {
359 u32 manc
= er32(MANC
);
361 /* disable hardware interception of ARP */
362 manc
&= ~(E1000_MANC_ARP_EN
);
368 static void e1000_release_manageability(struct e1000_adapter
*adapter
)
370 struct e1000_hw
*hw
= &adapter
->hw
;
372 if (adapter
->en_mng_pt
) {
373 u32 manc
= er32(MANC
);
375 /* re-enable hardware interception of ARP */
376 manc
|= E1000_MANC_ARP_EN
;
383 * e1000_configure - configure the hardware for RX and TX
384 * @adapter = private board structure
386 static void e1000_configure(struct e1000_adapter
*adapter
)
388 struct net_device
*netdev
= adapter
->netdev
;
391 e1000_set_rx_mode(netdev
);
393 e1000_restore_vlan(adapter
);
394 e1000_init_manageability(adapter
);
396 e1000_configure_tx(adapter
);
397 e1000_setup_rctl(adapter
);
398 e1000_configure_rx(adapter
);
399 /* call E1000_DESC_UNUSED which always leaves
400 * at least 1 descriptor unused to make sure
401 * next_to_use != next_to_clean */
402 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
403 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[i
];
404 adapter
->alloc_rx_buf(adapter
, ring
,
405 E1000_DESC_UNUSED(ring
));
409 int e1000_up(struct e1000_adapter
*adapter
)
411 struct e1000_hw
*hw
= &adapter
->hw
;
413 /* hardware has been reset, we need to reload some things */
414 e1000_configure(adapter
);
416 clear_bit(__E1000_DOWN
, &adapter
->flags
);
418 napi_enable(&adapter
->napi
);
420 e1000_irq_enable(adapter
);
422 netif_wake_queue(adapter
->netdev
);
424 /* fire a link change interrupt to start the watchdog */
425 ew32(ICS
, E1000_ICS_LSC
);
430 * e1000_power_up_phy - restore link in case the phy was powered down
431 * @adapter: address of board private structure
433 * The phy may be powered down to save power and turn off link when the
434 * driver is unloaded and wake on lan is not enabled (among others)
435 * *** this routine MUST be followed by a call to e1000_reset ***
439 void e1000_power_up_phy(struct e1000_adapter
*adapter
)
441 struct e1000_hw
*hw
= &adapter
->hw
;
444 /* Just clear the power down bit to wake the phy back up */
445 if (hw
->media_type
== e1000_media_type_copper
) {
446 /* according to the manual, the phy will retain its
447 * settings across a power-down/up cycle */
448 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
449 mii_reg
&= ~MII_CR_POWER_DOWN
;
450 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
454 static void e1000_power_down_phy(struct e1000_adapter
*adapter
)
456 struct e1000_hw
*hw
= &adapter
->hw
;
458 /* Power down the PHY so no link is implied when interface is down *
459 * The PHY cannot be powered down if any of the following is true *
462 * (c) SoL/IDER session is active */
463 if (!adapter
->wol
&& hw
->mac_type
>= e1000_82540
&&
464 hw
->media_type
== e1000_media_type_copper
) {
467 switch (hw
->mac_type
) {
470 case e1000_82545_rev_3
:
473 case e1000_82546_rev_3
:
475 case e1000_82541_rev_2
:
477 case e1000_82547_rev_2
:
478 if (er32(MANC
) & E1000_MANC_SMBUS_EN
)
484 e1000_read_phy_reg(hw
, PHY_CTRL
, &mii_reg
);
485 mii_reg
|= MII_CR_POWER_DOWN
;
486 e1000_write_phy_reg(hw
, PHY_CTRL
, mii_reg
);
493 static void e1000_down_and_stop(struct e1000_adapter
*adapter
)
495 set_bit(__E1000_DOWN
, &adapter
->flags
);
497 /* Only kill reset task if adapter is not resetting */
498 if (!test_bit(__E1000_RESETTING
, &adapter
->flags
))
499 cancel_work_sync(&adapter
->reset_task
);
501 cancel_delayed_work_sync(&adapter
->watchdog_task
);
502 cancel_delayed_work_sync(&adapter
->phy_info_task
);
503 cancel_delayed_work_sync(&adapter
->fifo_stall_task
);
506 void e1000_down(struct e1000_adapter
*adapter
)
508 struct e1000_hw
*hw
= &adapter
->hw
;
509 struct net_device
*netdev
= adapter
->netdev
;
513 /* disable receives in the hardware */
515 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
516 /* flush and sleep below */
518 netif_tx_disable(netdev
);
520 /* disable transmits in the hardware */
522 tctl
&= ~E1000_TCTL_EN
;
524 /* flush both disables and wait for them to finish */
528 napi_disable(&adapter
->napi
);
530 e1000_irq_disable(adapter
);
533 * Setting DOWN must be after irq_disable to prevent
534 * a screaming interrupt. Setting DOWN also prevents
535 * tasks from rescheduling.
537 e1000_down_and_stop(adapter
);
539 adapter
->link_speed
= 0;
540 adapter
->link_duplex
= 0;
541 netif_carrier_off(netdev
);
543 e1000_reset(adapter
);
544 e1000_clean_all_tx_rings(adapter
);
545 e1000_clean_all_rx_rings(adapter
);
548 static void e1000_reinit_safe(struct e1000_adapter
*adapter
)
550 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
552 mutex_lock(&adapter
->mutex
);
555 mutex_unlock(&adapter
->mutex
);
556 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
559 void e1000_reinit_locked(struct e1000_adapter
*adapter
)
561 /* if rtnl_lock is not held the call path is bogus */
563 WARN_ON(in_interrupt());
564 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
568 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
571 void e1000_reset(struct e1000_adapter
*adapter
)
573 struct e1000_hw
*hw
= &adapter
->hw
;
574 u32 pba
= 0, tx_space
, min_tx_space
, min_rx_space
;
575 bool legacy_pba_adjust
= false;
578 /* Repartition Pba for greater than 9k mtu
579 * To take effect CTRL.RST is required.
582 switch (hw
->mac_type
) {
583 case e1000_82542_rev2_0
:
584 case e1000_82542_rev2_1
:
589 case e1000_82541_rev_2
:
590 legacy_pba_adjust
= true;
594 case e1000_82545_rev_3
:
597 case e1000_82546_rev_3
:
601 case e1000_82547_rev_2
:
602 legacy_pba_adjust
= true;
605 case e1000_undefined
:
610 if (legacy_pba_adjust
) {
611 if (hw
->max_frame_size
> E1000_RXBUFFER_8192
)
612 pba
-= 8; /* allocate more FIFO for Tx */
614 if (hw
->mac_type
== e1000_82547
) {
615 adapter
->tx_fifo_head
= 0;
616 adapter
->tx_head_addr
= pba
<< E1000_TX_HEAD_ADDR_SHIFT
;
617 adapter
->tx_fifo_size
=
618 (E1000_PBA_40K
- pba
) << E1000_PBA_BYTES_SHIFT
;
619 atomic_set(&adapter
->tx_fifo_stall
, 0);
621 } else if (hw
->max_frame_size
> ETH_FRAME_LEN
+ ETH_FCS_LEN
) {
622 /* adjust PBA for jumbo frames */
625 /* To maintain wire speed transmits, the Tx FIFO should be
626 * large enough to accommodate two full transmit packets,
627 * rounded up to the next 1KB and expressed in KB. Likewise,
628 * the Rx FIFO should be large enough to accommodate at least
629 * one full receive packet and is similarly rounded up and
630 * expressed in KB. */
632 /* upper 16 bits has Tx packet buffer allocation size in KB */
633 tx_space
= pba
>> 16;
634 /* lower 16 bits has Rx packet buffer allocation size in KB */
637 * the tx fifo also stores 16 bytes of information about the tx
638 * but don't include ethernet FCS because hardware appends it
640 min_tx_space
= (hw
->max_frame_size
+
641 sizeof(struct e1000_tx_desc
) -
643 min_tx_space
= ALIGN(min_tx_space
, 1024);
645 /* software strips receive CRC, so leave room for it */
646 min_rx_space
= hw
->max_frame_size
;
647 min_rx_space
= ALIGN(min_rx_space
, 1024);
650 /* If current Tx allocation is less than the min Tx FIFO size,
651 * and the min Tx FIFO size is less than the current Rx FIFO
652 * allocation, take space away from current Rx allocation */
653 if (tx_space
< min_tx_space
&&
654 ((min_tx_space
- tx_space
) < pba
)) {
655 pba
= pba
- (min_tx_space
- tx_space
);
657 /* PCI/PCIx hardware has PBA alignment constraints */
658 switch (hw
->mac_type
) {
659 case e1000_82545
... e1000_82546_rev_3
:
660 pba
&= ~(E1000_PBA_8K
- 1);
666 /* if short on rx space, rx wins and must trump tx
667 * adjustment or use Early Receive if available */
668 if (pba
< min_rx_space
)
676 * flow control settings:
677 * The high water mark must be low enough to fit one full frame
678 * (or the size used for early receive) above it in the Rx FIFO.
679 * Set it to the lower of:
680 * - 90% of the Rx FIFO size, and
681 * - the full Rx FIFO size minus the early receive size (for parts
682 * with ERT support assuming ERT set to E1000_ERT_2048), or
683 * - the full Rx FIFO size minus one full frame
685 hwm
= min(((pba
<< 10) * 9 / 10),
686 ((pba
<< 10) - hw
->max_frame_size
));
688 hw
->fc_high_water
= hwm
& 0xFFF8; /* 8-byte granularity */
689 hw
->fc_low_water
= hw
->fc_high_water
- 8;
690 hw
->fc_pause_time
= E1000_FC_PAUSE_TIME
;
692 hw
->fc
= hw
->original_fc
;
694 /* Allow time for pending master requests to run */
696 if (hw
->mac_type
>= e1000_82544
)
699 if (e1000_init_hw(hw
))
700 e_dev_err("Hardware Error\n");
701 e1000_update_mng_vlan(adapter
);
703 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */
704 if (hw
->mac_type
>= e1000_82544
&&
706 hw
->autoneg_advertised
== ADVERTISE_1000_FULL
) {
707 u32 ctrl
= er32(CTRL
);
708 /* clear phy power management bit if we are in gig only mode,
709 * which if enabled will attempt negotiation to 100Mb, which
710 * can cause a loss of link at power off or driver unload */
711 ctrl
&= ~E1000_CTRL_SWDPIN3
;
715 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
716 ew32(VET
, ETHERNET_IEEE_VLAN_TYPE
);
718 e1000_reset_adaptive(hw
);
719 e1000_phy_get_info(hw
, &adapter
->phy_info
);
721 e1000_release_manageability(adapter
);
724 /* Dump the eeprom for users having checksum issues */
725 static void e1000_dump_eeprom(struct e1000_adapter
*adapter
)
727 struct net_device
*netdev
= adapter
->netdev
;
728 struct ethtool_eeprom eeprom
;
729 const struct ethtool_ops
*ops
= netdev
->ethtool_ops
;
732 u16 csum_old
, csum_new
= 0;
734 eeprom
.len
= ops
->get_eeprom_len(netdev
);
737 data
= kmalloc(eeprom
.len
, GFP_KERNEL
);
741 ops
->get_eeprom(netdev
, &eeprom
, data
);
743 csum_old
= (data
[EEPROM_CHECKSUM_REG
* 2]) +
744 (data
[EEPROM_CHECKSUM_REG
* 2 + 1] << 8);
745 for (i
= 0; i
< EEPROM_CHECKSUM_REG
* 2; i
+= 2)
746 csum_new
+= data
[i
] + (data
[i
+ 1] << 8);
747 csum_new
= EEPROM_SUM
- csum_new
;
749 pr_err("/*********************/\n");
750 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old
);
751 pr_err("Calculated : 0x%04x\n", csum_new
);
753 pr_err("Offset Values\n");
754 pr_err("======== ======\n");
755 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 16, 1, data
, 128, 0);
757 pr_err("Include this output when contacting your support provider.\n");
758 pr_err("This is not a software error! Something bad happened to\n");
759 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
760 pr_err("result in further problems, possibly loss of data,\n");
761 pr_err("corruption or system hangs!\n");
762 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
763 pr_err("which is invalid and requires you to set the proper MAC\n");
764 pr_err("address manually before continuing to enable this network\n");
765 pr_err("device. Please inspect the EEPROM dump and report the\n");
766 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
767 pr_err("/*********************/\n");
773 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
774 * @pdev: PCI device information struct
776 * Return true if an adapter needs ioport resources
778 static int e1000_is_need_ioport(struct pci_dev
*pdev
)
780 switch (pdev
->device
) {
781 case E1000_DEV_ID_82540EM
:
782 case E1000_DEV_ID_82540EM_LOM
:
783 case E1000_DEV_ID_82540EP
:
784 case E1000_DEV_ID_82540EP_LOM
:
785 case E1000_DEV_ID_82540EP_LP
:
786 case E1000_DEV_ID_82541EI
:
787 case E1000_DEV_ID_82541EI_MOBILE
:
788 case E1000_DEV_ID_82541ER
:
789 case E1000_DEV_ID_82541ER_LOM
:
790 case E1000_DEV_ID_82541GI
:
791 case E1000_DEV_ID_82541GI_LF
:
792 case E1000_DEV_ID_82541GI_MOBILE
:
793 case E1000_DEV_ID_82544EI_COPPER
:
794 case E1000_DEV_ID_82544EI_FIBER
:
795 case E1000_DEV_ID_82544GC_COPPER
:
796 case E1000_DEV_ID_82544GC_LOM
:
797 case E1000_DEV_ID_82545EM_COPPER
:
798 case E1000_DEV_ID_82545EM_FIBER
:
799 case E1000_DEV_ID_82546EB_COPPER
:
800 case E1000_DEV_ID_82546EB_FIBER
:
801 case E1000_DEV_ID_82546EB_QUAD_COPPER
:
808 static netdev_features_t
e1000_fix_features(struct net_device
*netdev
,
809 netdev_features_t features
)
812 * Since there is no support for separate rx/tx vlan accel
813 * enable/disable make sure tx flag is always in same state as rx.
815 if (features
& NETIF_F_HW_VLAN_RX
)
816 features
|= NETIF_F_HW_VLAN_TX
;
818 features
&= ~NETIF_F_HW_VLAN_TX
;
823 static int e1000_set_features(struct net_device
*netdev
,
824 netdev_features_t features
)
826 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
827 netdev_features_t changed
= features
^ netdev
->features
;
829 if (changed
& NETIF_F_HW_VLAN_RX
)
830 e1000_vlan_mode(netdev
, features
);
832 if (!(changed
& (NETIF_F_RXCSUM
| NETIF_F_RXALL
)))
835 netdev
->features
= features
;
836 adapter
->rx_csum
= !!(features
& NETIF_F_RXCSUM
);
838 if (netif_running(netdev
))
839 e1000_reinit_locked(adapter
);
841 e1000_reset(adapter
);
846 static const struct net_device_ops e1000_netdev_ops
= {
847 .ndo_open
= e1000_open
,
848 .ndo_stop
= e1000_close
,
849 .ndo_start_xmit
= e1000_xmit_frame
,
850 .ndo_get_stats
= e1000_get_stats
,
851 .ndo_set_rx_mode
= e1000_set_rx_mode
,
852 .ndo_set_mac_address
= e1000_set_mac
,
853 .ndo_tx_timeout
= e1000_tx_timeout
,
854 .ndo_change_mtu
= e1000_change_mtu
,
855 .ndo_do_ioctl
= e1000_ioctl
,
856 .ndo_validate_addr
= eth_validate_addr
,
857 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
858 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
859 #ifdef CONFIG_NET_POLL_CONTROLLER
860 .ndo_poll_controller
= e1000_netpoll
,
862 .ndo_fix_features
= e1000_fix_features
,
863 .ndo_set_features
= e1000_set_features
,
867 * e1000_init_hw_struct - initialize members of hw struct
868 * @adapter: board private struct
869 * @hw: structure used by e1000_hw.c
871 * Factors out initialization of the e1000_hw struct to its own function
872 * that can be called very early at init (just after struct allocation).
873 * Fields are initialized based on PCI device information and
874 * OS network device settings (MTU size).
875 * Returns negative error codes if MAC type setup fails.
877 static int e1000_init_hw_struct(struct e1000_adapter
*adapter
,
880 struct pci_dev
*pdev
= adapter
->pdev
;
882 /* PCI config space info */
883 hw
->vendor_id
= pdev
->vendor
;
884 hw
->device_id
= pdev
->device
;
885 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
886 hw
->subsystem_id
= pdev
->subsystem_device
;
887 hw
->revision_id
= pdev
->revision
;
889 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->pci_cmd_word
);
891 hw
->max_frame_size
= adapter
->netdev
->mtu
+
892 ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
893 hw
->min_frame_size
= MINIMUM_ETHERNET_FRAME_SIZE
;
895 /* identify the MAC */
896 if (e1000_set_mac_type(hw
)) {
897 e_err(probe
, "Unknown MAC Type\n");
901 switch (hw
->mac_type
) {
906 case e1000_82541_rev_2
:
907 case e1000_82547_rev_2
:
908 hw
->phy_init_script
= 1;
912 e1000_set_media_type(hw
);
913 e1000_get_bus_info(hw
);
915 hw
->wait_autoneg_complete
= false;
916 hw
->tbi_compatibility_en
= true;
917 hw
->adaptive_ifs
= true;
921 if (hw
->media_type
== e1000_media_type_copper
) {
922 hw
->mdix
= AUTO_ALL_MODES
;
923 hw
->disable_polarity_correction
= false;
924 hw
->master_slave
= E1000_MASTER_SLAVE
;
931 * e1000_probe - Device Initialization Routine
932 * @pdev: PCI device information struct
933 * @ent: entry in e1000_pci_tbl
935 * Returns 0 on success, negative on failure
937 * e1000_probe initializes an adapter identified by a pci_dev structure.
938 * The OS initialization, configuring of the adapter private structure,
939 * and a hardware reset occur.
941 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
942 const struct pci_device_id
*ent
)
944 struct net_device
*netdev
;
945 struct e1000_adapter
*adapter
;
948 static int cards_found
= 0;
949 static int global_quad_port_a
= 0; /* global ksp3 port a indication */
950 int i
, err
, pci_using_dac
;
953 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
954 int bars
, need_ioport
;
956 /* do not allocate ioport bars when not needed */
957 need_ioport
= e1000_is_need_ioport(pdev
);
959 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
960 err
= pci_enable_device(pdev
);
962 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
963 err
= pci_enable_device_mem(pdev
);
968 err
= pci_request_selected_regions(pdev
, bars
, e1000_driver_name
);
972 pci_set_master(pdev
);
973 err
= pci_save_state(pdev
);
975 goto err_alloc_etherdev
;
978 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
980 goto err_alloc_etherdev
;
982 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
984 pci_set_drvdata(pdev
, netdev
);
985 adapter
= netdev_priv(netdev
);
986 adapter
->netdev
= netdev
;
987 adapter
->pdev
= pdev
;
988 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
989 adapter
->bars
= bars
;
990 adapter
->need_ioport
= need_ioport
;
996 hw
->hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
1000 if (adapter
->need_ioport
) {
1001 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
1002 if (pci_resource_len(pdev
, i
) == 0)
1004 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
1005 hw
->io_base
= pci_resource_start(pdev
, i
);
1011 /* make ready for any if (hw->...) below */
1012 err
= e1000_init_hw_struct(adapter
, hw
);
1017 * there is a workaround being applied below that limits
1018 * 64-bit DMA addresses to 64-bit hardware. There are some
1019 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1022 if ((hw
->bus_type
== e1000_bus_type_pcix
) &&
1023 !dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64))) {
1025 * according to DMA-API-HOWTO, coherent calls will always
1026 * succeed if the set call did
1028 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
1031 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1033 pr_err("No usable DMA config, aborting\n");
1036 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1039 netdev
->netdev_ops
= &e1000_netdev_ops
;
1040 e1000_set_ethtool_ops(netdev
);
1041 netdev
->watchdog_timeo
= 5 * HZ
;
1042 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
1044 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
1046 adapter
->bd_number
= cards_found
;
1048 /* setup the private structure */
1050 err
= e1000_sw_init(adapter
);
1055 if (hw
->mac_type
== e1000_ce4100
) {
1056 hw
->ce4100_gbe_mdio_base_virt
=
1057 ioremap(pci_resource_start(pdev
, BAR_1
),
1058 pci_resource_len(pdev
, BAR_1
));
1060 if (!hw
->ce4100_gbe_mdio_base_virt
)
1061 goto err_mdio_ioremap
;
1064 if (hw
->mac_type
>= e1000_82543
) {
1065 netdev
->hw_features
= NETIF_F_SG
|
1068 netdev
->features
= NETIF_F_HW_VLAN_TX
|
1069 NETIF_F_HW_VLAN_FILTER
;
1072 if ((hw
->mac_type
>= e1000_82544
) &&
1073 (hw
->mac_type
!= e1000_82547
))
1074 netdev
->hw_features
|= NETIF_F_TSO
;
1076 netdev
->priv_flags
|= IFF_SUPP_NOFCS
;
1078 netdev
->features
|= netdev
->hw_features
;
1079 netdev
->hw_features
|= (NETIF_F_RXCSUM
|
1083 if (pci_using_dac
) {
1084 netdev
->features
|= NETIF_F_HIGHDMA
;
1085 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
1088 netdev
->vlan_features
|= (NETIF_F_TSO
|
1092 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
1094 adapter
->en_mng_pt
= e1000_enable_mng_pass_thru(hw
);
1096 /* initialize eeprom parameters */
1097 if (e1000_init_eeprom_params(hw
)) {
1098 e_err(probe
, "EEPROM initialization failed\n");
1102 /* before reading the EEPROM, reset the controller to
1103 * put the device in a known good starting state */
1107 /* make sure the EEPROM is good */
1108 if (e1000_validate_eeprom_checksum(hw
) < 0) {
1109 e_err(probe
, "The EEPROM Checksum Is Not Valid\n");
1110 e1000_dump_eeprom(adapter
);
1112 * set MAC address to all zeroes to invalidate and temporary
1113 * disable this device for the user. This blocks regular
1114 * traffic while still permitting ethtool ioctls from reaching
1115 * the hardware as well as allowing the user to run the
1116 * interface after manually setting a hw addr using
1119 memset(hw
->mac_addr
, 0, netdev
->addr_len
);
1121 /* copy the MAC address out of the EEPROM */
1122 if (e1000_read_mac_addr(hw
))
1123 e_err(probe
, "EEPROM Read Error\n");
1125 /* don't block initalization here due to bad MAC address */
1126 memcpy(netdev
->dev_addr
, hw
->mac_addr
, netdev
->addr_len
);
1127 memcpy(netdev
->perm_addr
, hw
->mac_addr
, netdev
->addr_len
);
1129 if (!is_valid_ether_addr(netdev
->perm_addr
))
1130 e_err(probe
, "Invalid MAC Address\n");
1133 INIT_DELAYED_WORK(&adapter
->watchdog_task
, e1000_watchdog
);
1134 INIT_DELAYED_WORK(&adapter
->fifo_stall_task
,
1135 e1000_82547_tx_fifo_stall_task
);
1136 INIT_DELAYED_WORK(&adapter
->phy_info_task
, e1000_update_phy_info_task
);
1137 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
1139 e1000_check_options(adapter
);
1141 /* Initial Wake on LAN setting
1142 * If APM wake is enabled in the EEPROM,
1143 * enable the ACPI Magic Packet filter
1146 switch (hw
->mac_type
) {
1147 case e1000_82542_rev2_0
:
1148 case e1000_82542_rev2_1
:
1152 e1000_read_eeprom(hw
,
1153 EEPROM_INIT_CONTROL2_REG
, 1, &eeprom_data
);
1154 eeprom_apme_mask
= E1000_EEPROM_82544_APM
;
1157 case e1000_82546_rev_3
:
1158 if (er32(STATUS
) & E1000_STATUS_FUNC_1
){
1159 e1000_read_eeprom(hw
,
1160 EEPROM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
1165 e1000_read_eeprom(hw
,
1166 EEPROM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1169 if (eeprom_data
& eeprom_apme_mask
)
1170 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1172 /* now that we have the eeprom settings, apply the special cases
1173 * where the eeprom may be wrong or the board simply won't support
1174 * wake on lan on a particular port */
1175 switch (pdev
->device
) {
1176 case E1000_DEV_ID_82546GB_PCIE
:
1177 adapter
->eeprom_wol
= 0;
1179 case E1000_DEV_ID_82546EB_FIBER
:
1180 case E1000_DEV_ID_82546GB_FIBER
:
1181 /* Wake events only supported on port A for dual fiber
1182 * regardless of eeprom setting */
1183 if (er32(STATUS
) & E1000_STATUS_FUNC_1
)
1184 adapter
->eeprom_wol
= 0;
1186 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3
:
1187 /* if quad port adapter, disable WoL on all but port A */
1188 if (global_quad_port_a
!= 0)
1189 adapter
->eeprom_wol
= 0;
1191 adapter
->quad_port_a
= true;
1192 /* Reset for multiple quad port adapters */
1193 if (++global_quad_port_a
== 4)
1194 global_quad_port_a
= 0;
1198 /* initialize the wol settings based on the eeprom settings */
1199 adapter
->wol
= adapter
->eeprom_wol
;
1200 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1202 /* Auto detect PHY address */
1203 if (hw
->mac_type
== e1000_ce4100
) {
1204 for (i
= 0; i
< 32; i
++) {
1206 e1000_read_phy_reg(hw
, PHY_ID2
, &tmp
);
1207 if (tmp
== 0 || tmp
== 0xFF) {
1216 /* reset the hardware with the new settings */
1217 e1000_reset(adapter
);
1219 strcpy(netdev
->name
, "eth%d");
1220 err
= register_netdev(netdev
);
1224 e1000_vlan_filter_on_off(adapter
, false);
1226 /* print bus type/speed/width info */
1227 e_info(probe
, "(PCI%s:%dMHz:%d-bit) %pM\n",
1228 ((hw
->bus_type
== e1000_bus_type_pcix
) ? "-X" : ""),
1229 ((hw
->bus_speed
== e1000_bus_speed_133
) ? 133 :
1230 (hw
->bus_speed
== e1000_bus_speed_120
) ? 120 :
1231 (hw
->bus_speed
== e1000_bus_speed_100
) ? 100 :
1232 (hw
->bus_speed
== e1000_bus_speed_66
) ? 66 : 33),
1233 ((hw
->bus_width
== e1000_bus_width_64
) ? 64 : 32),
1236 /* carrier off reporting is important to ethtool even BEFORE open */
1237 netif_carrier_off(netdev
);
1239 e_info(probe
, "Intel(R) PRO/1000 Network Connection\n");
1246 e1000_phy_hw_reset(hw
);
1248 if (hw
->flash_address
)
1249 iounmap(hw
->flash_address
);
1250 kfree(adapter
->tx_ring
);
1251 kfree(adapter
->rx_ring
);
1255 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1256 iounmap(hw
->hw_addr
);
1258 free_netdev(netdev
);
1260 pci_release_selected_regions(pdev
, bars
);
1262 pci_disable_device(pdev
);
1267 * e1000_remove - Device Removal Routine
1268 * @pdev: PCI device information struct
1270 * e1000_remove is called by the PCI subsystem to alert the driver
1271 * that it should release a PCI device. The could be caused by a
1272 * Hot-Plug event, or because the driver is going to be removed from
1276 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
1278 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1279 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1280 struct e1000_hw
*hw
= &adapter
->hw
;
1282 e1000_down_and_stop(adapter
);
1283 e1000_release_manageability(adapter
);
1285 unregister_netdev(netdev
);
1287 e1000_phy_hw_reset(hw
);
1289 kfree(adapter
->tx_ring
);
1290 kfree(adapter
->rx_ring
);
1292 if (hw
->mac_type
== e1000_ce4100
)
1293 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1294 iounmap(hw
->hw_addr
);
1295 if (hw
->flash_address
)
1296 iounmap(hw
->flash_address
);
1297 pci_release_selected_regions(pdev
, adapter
->bars
);
1299 free_netdev(netdev
);
1301 pci_disable_device(pdev
);
1305 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1306 * @adapter: board private structure to initialize
1308 * e1000_sw_init initializes the Adapter private data structure.
1309 * e1000_init_hw_struct MUST be called before this function
1312 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
1314 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1316 adapter
->num_tx_queues
= 1;
1317 adapter
->num_rx_queues
= 1;
1319 if (e1000_alloc_queues(adapter
)) {
1320 e_err(probe
, "Unable to allocate memory for queues\n");
1324 /* Explicitly disable IRQ since the NIC can be in any state. */
1325 e1000_irq_disable(adapter
);
1327 spin_lock_init(&adapter
->stats_lock
);
1328 mutex_init(&adapter
->mutex
);
1330 set_bit(__E1000_DOWN
, &adapter
->flags
);
1336 * e1000_alloc_queues - Allocate memory for all rings
1337 * @adapter: board private structure to initialize
1339 * We allocate one ring per queue at run-time since we don't know the
1340 * number of queues at compile-time.
1343 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1345 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
1346 sizeof(struct e1000_tx_ring
), GFP_KERNEL
);
1347 if (!adapter
->tx_ring
)
1350 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
1351 sizeof(struct e1000_rx_ring
), GFP_KERNEL
);
1352 if (!adapter
->rx_ring
) {
1353 kfree(adapter
->tx_ring
);
1357 return E1000_SUCCESS
;
1361 * e1000_open - Called when a network interface is made active
1362 * @netdev: network interface device structure
1364 * Returns 0 on success, negative value on failure
1366 * The open entry point is called when a network interface is made
1367 * active by the system (IFF_UP). At this point all resources needed
1368 * for transmit and receive operations are allocated, the interrupt
1369 * handler is registered with the OS, the watchdog task is started,
1370 * and the stack is notified that the interface is ready.
1373 static int e1000_open(struct net_device
*netdev
)
1375 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1376 struct e1000_hw
*hw
= &adapter
->hw
;
1379 /* disallow open during test */
1380 if (test_bit(__E1000_TESTING
, &adapter
->flags
))
1383 netif_carrier_off(netdev
);
1385 /* allocate transmit descriptors */
1386 err
= e1000_setup_all_tx_resources(adapter
);
1390 /* allocate receive descriptors */
1391 err
= e1000_setup_all_rx_resources(adapter
);
1395 e1000_power_up_phy(adapter
);
1397 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
1398 if ((hw
->mng_cookie
.status
&
1399 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
)) {
1400 e1000_update_mng_vlan(adapter
);
1403 /* before we allocate an interrupt, we must be ready to handle it.
1404 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1405 * as soon as we call pci_request_irq, so we have to setup our
1406 * clean_rx handler before we do so. */
1407 e1000_configure(adapter
);
1409 err
= e1000_request_irq(adapter
);
1413 /* From here on the code is the same as e1000_up() */
1414 clear_bit(__E1000_DOWN
, &adapter
->flags
);
1416 napi_enable(&adapter
->napi
);
1418 e1000_irq_enable(adapter
);
1420 netif_start_queue(netdev
);
1422 /* fire a link status change interrupt to start the watchdog */
1423 ew32(ICS
, E1000_ICS_LSC
);
1425 return E1000_SUCCESS
;
1428 e1000_power_down_phy(adapter
);
1429 e1000_free_all_rx_resources(adapter
);
1431 e1000_free_all_tx_resources(adapter
);
1433 e1000_reset(adapter
);
1439 * e1000_close - Disables a network interface
1440 * @netdev: network interface device structure
1442 * Returns 0, this is not allowed to fail
1444 * The close entry point is called when an interface is de-activated
1445 * by the OS. The hardware is still under the drivers control, but
1446 * needs to be disabled. A global MAC reset is issued to stop the
1447 * hardware, and all transmit and receive resources are freed.
1450 static int e1000_close(struct net_device
*netdev
)
1452 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1453 struct e1000_hw
*hw
= &adapter
->hw
;
1455 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
1456 e1000_down(adapter
);
1457 e1000_power_down_phy(adapter
);
1458 e1000_free_irq(adapter
);
1460 e1000_free_all_tx_resources(adapter
);
1461 e1000_free_all_rx_resources(adapter
);
1463 /* kill manageability vlan ID if supported, but not if a vlan with
1464 * the same ID is registered on the host OS (let 8021q kill it) */
1465 if ((hw
->mng_cookie
.status
&
1466 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
1467 !test_bit(adapter
->mng_vlan_id
, adapter
->active_vlans
)) {
1468 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1475 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1476 * @adapter: address of board private structure
1477 * @start: address of beginning of memory
1478 * @len: length of memory
1480 static bool e1000_check_64k_bound(struct e1000_adapter
*adapter
, void *start
,
1483 struct e1000_hw
*hw
= &adapter
->hw
;
1484 unsigned long begin
= (unsigned long)start
;
1485 unsigned long end
= begin
+ len
;
1487 /* First rev 82545 and 82546 need to not allow any memory
1488 * write location to cross 64k boundary due to errata 23 */
1489 if (hw
->mac_type
== e1000_82545
||
1490 hw
->mac_type
== e1000_ce4100
||
1491 hw
->mac_type
== e1000_82546
) {
1492 return ((begin
^ (end
- 1)) >> 16) != 0 ? false : true;
1499 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1500 * @adapter: board private structure
1501 * @txdr: tx descriptor ring (for a specific queue) to setup
1503 * Return 0 on success, negative on failure
1506 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
1507 struct e1000_tx_ring
*txdr
)
1509 struct pci_dev
*pdev
= adapter
->pdev
;
1512 size
= sizeof(struct e1000_buffer
) * txdr
->count
;
1513 txdr
->buffer_info
= vzalloc(size
);
1514 if (!txdr
->buffer_info
) {
1515 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1520 /* round up to nearest 4K */
1522 txdr
->size
= txdr
->count
* sizeof(struct e1000_tx_desc
);
1523 txdr
->size
= ALIGN(txdr
->size
, 4096);
1525 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
1529 vfree(txdr
->buffer_info
);
1530 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1535 /* Fix for errata 23, can't cross 64kB boundary */
1536 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1537 void *olddesc
= txdr
->desc
;
1538 dma_addr_t olddma
= txdr
->dma
;
1539 e_err(tx_err
, "txdr align check failed: %u bytes at %p\n",
1540 txdr
->size
, txdr
->desc
);
1541 /* Try again, without freeing the previous */
1542 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
,
1543 &txdr
->dma
, GFP_KERNEL
);
1544 /* Failed allocation, critical failure */
1546 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1548 goto setup_tx_desc_die
;
1551 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1553 dma_free_coherent(&pdev
->dev
, txdr
->size
, txdr
->desc
,
1555 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1557 e_err(probe
, "Unable to allocate aligned memory "
1558 "for the transmit descriptor ring\n");
1559 vfree(txdr
->buffer_info
);
1562 /* Free old allocation, new allocation was successful */
1563 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1567 memset(txdr
->desc
, 0, txdr
->size
);
1569 txdr
->next_to_use
= 0;
1570 txdr
->next_to_clean
= 0;
1576 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1577 * (Descriptors) for all queues
1578 * @adapter: board private structure
1580 * Return 0 on success, negative on failure
1583 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
)
1587 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1588 err
= e1000_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1590 e_err(probe
, "Allocation for Tx Queue %u failed\n", i
);
1591 for (i
-- ; i
>= 0; i
--)
1592 e1000_free_tx_resources(adapter
,
1593 &adapter
->tx_ring
[i
]);
1602 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1603 * @adapter: board private structure
1605 * Configure the Tx unit of the MAC after a reset.
1608 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
1611 struct e1000_hw
*hw
= &adapter
->hw
;
1612 u32 tdlen
, tctl
, tipg
;
1615 /* Setup the HW Tx Head and Tail descriptor pointers */
1617 switch (adapter
->num_tx_queues
) {
1620 tdba
= adapter
->tx_ring
[0].dma
;
1621 tdlen
= adapter
->tx_ring
[0].count
*
1622 sizeof(struct e1000_tx_desc
);
1624 ew32(TDBAH
, (tdba
>> 32));
1625 ew32(TDBAL
, (tdba
& 0x00000000ffffffffULL
));
1628 adapter
->tx_ring
[0].tdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDH
: E1000_82542_TDH
);
1629 adapter
->tx_ring
[0].tdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDT
: E1000_82542_TDT
);
1633 /* Set the default values for the Tx Inter Packet Gap timer */
1634 if ((hw
->media_type
== e1000_media_type_fiber
||
1635 hw
->media_type
== e1000_media_type_internal_serdes
))
1636 tipg
= DEFAULT_82543_TIPG_IPGT_FIBER
;
1638 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
;
1640 switch (hw
->mac_type
) {
1641 case e1000_82542_rev2_0
:
1642 case e1000_82542_rev2_1
:
1643 tipg
= DEFAULT_82542_TIPG_IPGT
;
1644 ipgr1
= DEFAULT_82542_TIPG_IPGR1
;
1645 ipgr2
= DEFAULT_82542_TIPG_IPGR2
;
1648 ipgr1
= DEFAULT_82543_TIPG_IPGR1
;
1649 ipgr2
= DEFAULT_82543_TIPG_IPGR2
;
1652 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
1653 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
1656 /* Set the Tx Interrupt Delay register */
1658 ew32(TIDV
, adapter
->tx_int_delay
);
1659 if (hw
->mac_type
>= e1000_82540
)
1660 ew32(TADV
, adapter
->tx_abs_int_delay
);
1662 /* Program the Transmit Control Register */
1665 tctl
&= ~E1000_TCTL_CT
;
1666 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1667 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1669 e1000_config_collision_dist(hw
);
1671 /* Setup Transmit Descriptor Settings for eop descriptor */
1672 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
1674 /* only set IDE if we are delaying interrupts using the timers */
1675 if (adapter
->tx_int_delay
)
1676 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
1678 if (hw
->mac_type
< e1000_82543
)
1679 adapter
->txd_cmd
|= E1000_TXD_CMD_RPS
;
1681 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
1683 /* Cache if we're 82544 running in PCI-X because we'll
1684 * need this to apply a workaround later in the send path. */
1685 if (hw
->mac_type
== e1000_82544
&&
1686 hw
->bus_type
== e1000_bus_type_pcix
)
1687 adapter
->pcix_82544
= true;
1694 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1695 * @adapter: board private structure
1696 * @rxdr: rx descriptor ring (for a specific queue) to setup
1698 * Returns 0 on success, negative on failure
1701 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
1702 struct e1000_rx_ring
*rxdr
)
1704 struct pci_dev
*pdev
= adapter
->pdev
;
1707 size
= sizeof(struct e1000_buffer
) * rxdr
->count
;
1708 rxdr
->buffer_info
= vzalloc(size
);
1709 if (!rxdr
->buffer_info
) {
1710 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1715 desc_len
= sizeof(struct e1000_rx_desc
);
1717 /* Round up to nearest 4K */
1719 rxdr
->size
= rxdr
->count
* desc_len
;
1720 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
1722 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
1726 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1729 vfree(rxdr
->buffer_info
);
1733 /* Fix for errata 23, can't cross 64kB boundary */
1734 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1735 void *olddesc
= rxdr
->desc
;
1736 dma_addr_t olddma
= rxdr
->dma
;
1737 e_err(rx_err
, "rxdr align check failed: %u bytes at %p\n",
1738 rxdr
->size
, rxdr
->desc
);
1739 /* Try again, without freeing the previous */
1740 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
,
1741 &rxdr
->dma
, GFP_KERNEL
);
1742 /* Failed allocation, critical failure */
1744 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1746 e_err(probe
, "Unable to allocate memory for the Rx "
1747 "descriptor ring\n");
1748 goto setup_rx_desc_die
;
1751 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1753 dma_free_coherent(&pdev
->dev
, rxdr
->size
, rxdr
->desc
,
1755 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1757 e_err(probe
, "Unable to allocate aligned memory for "
1758 "the Rx descriptor ring\n");
1759 goto setup_rx_desc_die
;
1761 /* Free old allocation, new allocation was successful */
1762 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1766 memset(rxdr
->desc
, 0, rxdr
->size
);
1768 rxdr
->next_to_clean
= 0;
1769 rxdr
->next_to_use
= 0;
1770 rxdr
->rx_skb_top
= NULL
;
1776 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1777 * (Descriptors) for all queues
1778 * @adapter: board private structure
1780 * Return 0 on success, negative on failure
1783 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
)
1787 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1788 err
= e1000_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1790 e_err(probe
, "Allocation for Rx Queue %u failed\n", i
);
1791 for (i
-- ; i
>= 0; i
--)
1792 e1000_free_rx_resources(adapter
,
1793 &adapter
->rx_ring
[i
]);
1802 * e1000_setup_rctl - configure the receive control registers
1803 * @adapter: Board private structure
1805 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
1807 struct e1000_hw
*hw
= &adapter
->hw
;
1812 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1814 rctl
|= E1000_RCTL_BAM
| E1000_RCTL_LBM_NO
|
1815 E1000_RCTL_RDMTS_HALF
|
1816 (hw
->mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1818 if (hw
->tbi_compatibility_on
== 1)
1819 rctl
|= E1000_RCTL_SBP
;
1821 rctl
&= ~E1000_RCTL_SBP
;
1823 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1824 rctl
&= ~E1000_RCTL_LPE
;
1826 rctl
|= E1000_RCTL_LPE
;
1828 /* Setup buffer sizes */
1829 rctl
&= ~E1000_RCTL_SZ_4096
;
1830 rctl
|= E1000_RCTL_BSEX
;
1831 switch (adapter
->rx_buffer_len
) {
1832 case E1000_RXBUFFER_2048
:
1834 rctl
|= E1000_RCTL_SZ_2048
;
1835 rctl
&= ~E1000_RCTL_BSEX
;
1837 case E1000_RXBUFFER_4096
:
1838 rctl
|= E1000_RCTL_SZ_4096
;
1840 case E1000_RXBUFFER_8192
:
1841 rctl
|= E1000_RCTL_SZ_8192
;
1843 case E1000_RXBUFFER_16384
:
1844 rctl
|= E1000_RCTL_SZ_16384
;
1848 /* This is useful for sniffing bad packets. */
1849 if (adapter
->netdev
->features
& NETIF_F_RXALL
) {
1850 /* UPE and MPE will be handled by normal PROMISC logic
1851 * in e1000e_set_rx_mode */
1852 rctl
|= (E1000_RCTL_SBP
| /* Receive bad packets */
1853 E1000_RCTL_BAM
| /* RX All Bcast Pkts */
1854 E1000_RCTL_PMCF
); /* RX All MAC Ctrl Pkts */
1856 rctl
&= ~(E1000_RCTL_VFE
| /* Disable VLAN filter */
1857 E1000_RCTL_DPF
| /* Allow filtered pause */
1858 E1000_RCTL_CFIEN
); /* Dis VLAN CFIEN Filter */
1859 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1860 * and that breaks VLANs.
1868 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1869 * @adapter: board private structure
1871 * Configure the Rx unit of the MAC after a reset.
1874 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
1877 struct e1000_hw
*hw
= &adapter
->hw
;
1878 u32 rdlen
, rctl
, rxcsum
;
1880 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1881 rdlen
= adapter
->rx_ring
[0].count
*
1882 sizeof(struct e1000_rx_desc
);
1883 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
1884 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
1886 rdlen
= adapter
->rx_ring
[0].count
*
1887 sizeof(struct e1000_rx_desc
);
1888 adapter
->clean_rx
= e1000_clean_rx_irq
;
1889 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
1892 /* disable receives while setting up the descriptors */
1894 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1896 /* set the Receive Delay Timer Register */
1897 ew32(RDTR
, adapter
->rx_int_delay
);
1899 if (hw
->mac_type
>= e1000_82540
) {
1900 ew32(RADV
, adapter
->rx_abs_int_delay
);
1901 if (adapter
->itr_setting
!= 0)
1902 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
1905 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1906 * the Base and Length of the Rx Descriptor Ring */
1907 switch (adapter
->num_rx_queues
) {
1910 rdba
= adapter
->rx_ring
[0].dma
;
1912 ew32(RDBAH
, (rdba
>> 32));
1913 ew32(RDBAL
, (rdba
& 0x00000000ffffffffULL
));
1916 adapter
->rx_ring
[0].rdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDH
: E1000_82542_RDH
);
1917 adapter
->rx_ring
[0].rdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDT
: E1000_82542_RDT
);
1921 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1922 if (hw
->mac_type
>= e1000_82543
) {
1923 rxcsum
= er32(RXCSUM
);
1924 if (adapter
->rx_csum
)
1925 rxcsum
|= E1000_RXCSUM_TUOFL
;
1927 /* don't need to clear IPPCSE as it defaults to 0 */
1928 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1929 ew32(RXCSUM
, rxcsum
);
1932 /* Enable Receives */
1933 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
1937 * e1000_free_tx_resources - Free Tx Resources per Queue
1938 * @adapter: board private structure
1939 * @tx_ring: Tx descriptor ring for a specific queue
1941 * Free all transmit software resources
1944 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
1945 struct e1000_tx_ring
*tx_ring
)
1947 struct pci_dev
*pdev
= adapter
->pdev
;
1949 e1000_clean_tx_ring(adapter
, tx_ring
);
1951 vfree(tx_ring
->buffer_info
);
1952 tx_ring
->buffer_info
= NULL
;
1954 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1957 tx_ring
->desc
= NULL
;
1961 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1962 * @adapter: board private structure
1964 * Free all transmit software resources
1967 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
)
1971 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1972 e1000_free_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1975 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter
*adapter
,
1976 struct e1000_buffer
*buffer_info
)
1978 if (buffer_info
->dma
) {
1979 if (buffer_info
->mapped_as_page
)
1980 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1981 buffer_info
->length
, DMA_TO_DEVICE
);
1983 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1984 buffer_info
->length
,
1986 buffer_info
->dma
= 0;
1988 if (buffer_info
->skb
) {
1989 dev_kfree_skb_any(buffer_info
->skb
);
1990 buffer_info
->skb
= NULL
;
1992 buffer_info
->time_stamp
= 0;
1993 /* buffer_info must be completely set up in the transmit path */
1997 * e1000_clean_tx_ring - Free Tx Buffers
1998 * @adapter: board private structure
1999 * @tx_ring: ring to be cleaned
2002 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
2003 struct e1000_tx_ring
*tx_ring
)
2005 struct e1000_hw
*hw
= &adapter
->hw
;
2006 struct e1000_buffer
*buffer_info
;
2010 /* Free all the Tx ring sk_buffs */
2012 for (i
= 0; i
< tx_ring
->count
; i
++) {
2013 buffer_info
= &tx_ring
->buffer_info
[i
];
2014 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2017 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
2018 memset(tx_ring
->buffer_info
, 0, size
);
2020 /* Zero out the descriptor ring */
2022 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2024 tx_ring
->next_to_use
= 0;
2025 tx_ring
->next_to_clean
= 0;
2026 tx_ring
->last_tx_tso
= false;
2028 writel(0, hw
->hw_addr
+ tx_ring
->tdh
);
2029 writel(0, hw
->hw_addr
+ tx_ring
->tdt
);
2033 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2034 * @adapter: board private structure
2037 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
)
2041 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2042 e1000_clean_tx_ring(adapter
, &adapter
->tx_ring
[i
]);
2046 * e1000_free_rx_resources - Free Rx Resources
2047 * @adapter: board private structure
2048 * @rx_ring: ring to clean the resources from
2050 * Free all receive software resources
2053 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
2054 struct e1000_rx_ring
*rx_ring
)
2056 struct pci_dev
*pdev
= adapter
->pdev
;
2058 e1000_clean_rx_ring(adapter
, rx_ring
);
2060 vfree(rx_ring
->buffer_info
);
2061 rx_ring
->buffer_info
= NULL
;
2063 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
2066 rx_ring
->desc
= NULL
;
2070 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2071 * @adapter: board private structure
2073 * Free all receive software resources
2076 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
)
2080 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2081 e1000_free_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
2085 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2086 * @adapter: board private structure
2087 * @rx_ring: ring to free buffers from
2090 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
2091 struct e1000_rx_ring
*rx_ring
)
2093 struct e1000_hw
*hw
= &adapter
->hw
;
2094 struct e1000_buffer
*buffer_info
;
2095 struct pci_dev
*pdev
= adapter
->pdev
;
2099 /* Free all the Rx ring sk_buffs */
2100 for (i
= 0; i
< rx_ring
->count
; i
++) {
2101 buffer_info
= &rx_ring
->buffer_info
[i
];
2102 if (buffer_info
->dma
&&
2103 adapter
->clean_rx
== e1000_clean_rx_irq
) {
2104 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
2105 buffer_info
->length
,
2107 } else if (buffer_info
->dma
&&
2108 adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
) {
2109 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
2110 buffer_info
->length
,
2114 buffer_info
->dma
= 0;
2115 if (buffer_info
->page
) {
2116 put_page(buffer_info
->page
);
2117 buffer_info
->page
= NULL
;
2119 if (buffer_info
->skb
) {
2120 dev_kfree_skb(buffer_info
->skb
);
2121 buffer_info
->skb
= NULL
;
2125 /* there also may be some cached data from a chained receive */
2126 if (rx_ring
->rx_skb_top
) {
2127 dev_kfree_skb(rx_ring
->rx_skb_top
);
2128 rx_ring
->rx_skb_top
= NULL
;
2131 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
2132 memset(rx_ring
->buffer_info
, 0, size
);
2134 /* Zero out the descriptor ring */
2135 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2137 rx_ring
->next_to_clean
= 0;
2138 rx_ring
->next_to_use
= 0;
2140 writel(0, hw
->hw_addr
+ rx_ring
->rdh
);
2141 writel(0, hw
->hw_addr
+ rx_ring
->rdt
);
2145 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2146 * @adapter: board private structure
2149 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
)
2153 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2154 e1000_clean_rx_ring(adapter
, &adapter
->rx_ring
[i
]);
2157 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2158 * and memory write and invalidate disabled for certain operations
2160 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
)
2162 struct e1000_hw
*hw
= &adapter
->hw
;
2163 struct net_device
*netdev
= adapter
->netdev
;
2166 e1000_pci_clear_mwi(hw
);
2169 rctl
|= E1000_RCTL_RST
;
2171 E1000_WRITE_FLUSH();
2174 if (netif_running(netdev
))
2175 e1000_clean_all_rx_rings(adapter
);
2178 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
)
2180 struct e1000_hw
*hw
= &adapter
->hw
;
2181 struct net_device
*netdev
= adapter
->netdev
;
2185 rctl
&= ~E1000_RCTL_RST
;
2187 E1000_WRITE_FLUSH();
2190 if (hw
->pci_cmd_word
& PCI_COMMAND_INVALIDATE
)
2191 e1000_pci_set_mwi(hw
);
2193 if (netif_running(netdev
)) {
2194 /* No need to loop, because 82542 supports only 1 queue */
2195 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[0];
2196 e1000_configure_rx(adapter
);
2197 adapter
->alloc_rx_buf(adapter
, ring
, E1000_DESC_UNUSED(ring
));
2202 * e1000_set_mac - Change the Ethernet Address of the NIC
2203 * @netdev: network interface device structure
2204 * @p: pointer to an address structure
2206 * Returns 0 on success, negative on failure
2209 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
2211 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2212 struct e1000_hw
*hw
= &adapter
->hw
;
2213 struct sockaddr
*addr
= p
;
2215 if (!is_valid_ether_addr(addr
->sa_data
))
2216 return -EADDRNOTAVAIL
;
2218 /* 82542 2.0 needs to be in reset to write receive address registers */
2220 if (hw
->mac_type
== e1000_82542_rev2_0
)
2221 e1000_enter_82542_rst(adapter
);
2223 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2224 memcpy(hw
->mac_addr
, addr
->sa_data
, netdev
->addr_len
);
2226 e1000_rar_set(hw
, hw
->mac_addr
, 0);
2228 if (hw
->mac_type
== e1000_82542_rev2_0
)
2229 e1000_leave_82542_rst(adapter
);
2235 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2236 * @netdev: network interface device structure
2238 * The set_rx_mode entry point is called whenever the unicast or multicast
2239 * address lists or the network interface flags are updated. This routine is
2240 * responsible for configuring the hardware for proper unicast, multicast,
2241 * promiscuous mode, and all-multi behavior.
2244 static void e1000_set_rx_mode(struct net_device
*netdev
)
2246 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2247 struct e1000_hw
*hw
= &adapter
->hw
;
2248 struct netdev_hw_addr
*ha
;
2249 bool use_uc
= false;
2252 int i
, rar_entries
= E1000_RAR_ENTRIES
;
2253 int mta_reg_count
= E1000_NUM_MTA_REGISTERS
;
2254 u32
*mcarray
= kcalloc(mta_reg_count
, sizeof(u32
), GFP_ATOMIC
);
2257 e_err(probe
, "memory allocation failed\n");
2261 /* Check for Promiscuous and All Multicast modes */
2265 if (netdev
->flags
& IFF_PROMISC
) {
2266 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2267 rctl
&= ~E1000_RCTL_VFE
;
2269 if (netdev
->flags
& IFF_ALLMULTI
)
2270 rctl
|= E1000_RCTL_MPE
;
2272 rctl
&= ~E1000_RCTL_MPE
;
2273 /* Enable VLAN filter if there is a VLAN */
2274 if (e1000_vlan_used(adapter
))
2275 rctl
|= E1000_RCTL_VFE
;
2278 if (netdev_uc_count(netdev
) > rar_entries
- 1) {
2279 rctl
|= E1000_RCTL_UPE
;
2280 } else if (!(netdev
->flags
& IFF_PROMISC
)) {
2281 rctl
&= ~E1000_RCTL_UPE
;
2287 /* 82542 2.0 needs to be in reset to write receive address registers */
2289 if (hw
->mac_type
== e1000_82542_rev2_0
)
2290 e1000_enter_82542_rst(adapter
);
2292 /* load the first 14 addresses into the exact filters 1-14. Unicast
2293 * addresses take precedence to avoid disabling unicast filtering
2296 * RAR 0 is used for the station MAC address
2297 * if there are not 14 addresses, go ahead and clear the filters
2301 netdev_for_each_uc_addr(ha
, netdev
) {
2302 if (i
== rar_entries
)
2304 e1000_rar_set(hw
, ha
->addr
, i
++);
2307 netdev_for_each_mc_addr(ha
, netdev
) {
2308 if (i
== rar_entries
) {
2309 /* load any remaining addresses into the hash table */
2310 u32 hash_reg
, hash_bit
, mta
;
2311 hash_value
= e1000_hash_mc_addr(hw
, ha
->addr
);
2312 hash_reg
= (hash_value
>> 5) & 0x7F;
2313 hash_bit
= hash_value
& 0x1F;
2314 mta
= (1 << hash_bit
);
2315 mcarray
[hash_reg
] |= mta
;
2317 e1000_rar_set(hw
, ha
->addr
, i
++);
2321 for (; i
< rar_entries
; i
++) {
2322 E1000_WRITE_REG_ARRAY(hw
, RA
, i
<< 1, 0);
2323 E1000_WRITE_FLUSH();
2324 E1000_WRITE_REG_ARRAY(hw
, RA
, (i
<< 1) + 1, 0);
2325 E1000_WRITE_FLUSH();
2328 /* write the hash table completely, write from bottom to avoid
2329 * both stupid write combining chipsets, and flushing each write */
2330 for (i
= mta_reg_count
- 1; i
>= 0 ; i
--) {
2332 * If we are on an 82544 has an errata where writing odd
2333 * offsets overwrites the previous even offset, but writing
2334 * backwards over the range solves the issue by always
2335 * writing the odd offset first
2337 E1000_WRITE_REG_ARRAY(hw
, MTA
, i
, mcarray
[i
]);
2339 E1000_WRITE_FLUSH();
2341 if (hw
->mac_type
== e1000_82542_rev2_0
)
2342 e1000_leave_82542_rst(adapter
);
2348 * e1000_update_phy_info_task - get phy info
2349 * @work: work struct contained inside adapter struct
2351 * Need to wait a few seconds after link up to get diagnostic information from
2354 static void e1000_update_phy_info_task(struct work_struct
*work
)
2356 struct e1000_adapter
*adapter
= container_of(work
,
2357 struct e1000_adapter
,
2358 phy_info_task
.work
);
2359 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2361 mutex_lock(&adapter
->mutex
);
2362 e1000_phy_get_info(&adapter
->hw
, &adapter
->phy_info
);
2363 mutex_unlock(&adapter
->mutex
);
2367 * e1000_82547_tx_fifo_stall_task - task to complete work
2368 * @work: work struct contained inside adapter struct
2370 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
)
2372 struct e1000_adapter
*adapter
= container_of(work
,
2373 struct e1000_adapter
,
2374 fifo_stall_task
.work
);
2375 struct e1000_hw
*hw
= &adapter
->hw
;
2376 struct net_device
*netdev
= adapter
->netdev
;
2379 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2381 mutex_lock(&adapter
->mutex
);
2382 if (atomic_read(&adapter
->tx_fifo_stall
)) {
2383 if ((er32(TDT
) == er32(TDH
)) &&
2384 (er32(TDFT
) == er32(TDFH
)) &&
2385 (er32(TDFTS
) == er32(TDFHS
))) {
2387 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
2388 ew32(TDFT
, adapter
->tx_head_addr
);
2389 ew32(TDFH
, adapter
->tx_head_addr
);
2390 ew32(TDFTS
, adapter
->tx_head_addr
);
2391 ew32(TDFHS
, adapter
->tx_head_addr
);
2393 E1000_WRITE_FLUSH();
2395 adapter
->tx_fifo_head
= 0;
2396 atomic_set(&adapter
->tx_fifo_stall
, 0);
2397 netif_wake_queue(netdev
);
2398 } else if (!test_bit(__E1000_DOWN
, &adapter
->flags
)) {
2399 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
2402 mutex_unlock(&adapter
->mutex
);
2405 bool e1000_has_link(struct e1000_adapter
*adapter
)
2407 struct e1000_hw
*hw
= &adapter
->hw
;
2408 bool link_active
= false;
2410 /* get_link_status is set on LSC (link status) interrupt or rx
2411 * sequence error interrupt (except on intel ce4100).
2412 * get_link_status will stay false until the
2413 * e1000_check_for_link establishes link for copper adapters
2416 switch (hw
->media_type
) {
2417 case e1000_media_type_copper
:
2418 if (hw
->mac_type
== e1000_ce4100
)
2419 hw
->get_link_status
= 1;
2420 if (hw
->get_link_status
) {
2421 e1000_check_for_link(hw
);
2422 link_active
= !hw
->get_link_status
;
2427 case e1000_media_type_fiber
:
2428 e1000_check_for_link(hw
);
2429 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
2431 case e1000_media_type_internal_serdes
:
2432 e1000_check_for_link(hw
);
2433 link_active
= hw
->serdes_has_link
;
2443 * e1000_watchdog - work function
2444 * @work: work struct contained inside adapter struct
2446 static void e1000_watchdog(struct work_struct
*work
)
2448 struct e1000_adapter
*adapter
= container_of(work
,
2449 struct e1000_adapter
,
2450 watchdog_task
.work
);
2451 struct e1000_hw
*hw
= &adapter
->hw
;
2452 struct net_device
*netdev
= adapter
->netdev
;
2453 struct e1000_tx_ring
*txdr
= adapter
->tx_ring
;
2456 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2459 mutex_lock(&adapter
->mutex
);
2460 link
= e1000_has_link(adapter
);
2461 if ((netif_carrier_ok(netdev
)) && link
)
2465 if (!netif_carrier_ok(netdev
)) {
2468 /* update snapshot of PHY registers on LSC */
2469 e1000_get_speed_and_duplex(hw
,
2470 &adapter
->link_speed
,
2471 &adapter
->link_duplex
);
2474 pr_info("%s NIC Link is Up %d Mbps %s, "
2475 "Flow Control: %s\n",
2477 adapter
->link_speed
,
2478 adapter
->link_duplex
== FULL_DUPLEX
?
2479 "Full Duplex" : "Half Duplex",
2480 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2481 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2482 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2483 E1000_CTRL_TFCE
) ? "TX" : "None")));
2485 /* adjust timeout factor according to speed/duplex */
2486 adapter
->tx_timeout_factor
= 1;
2487 switch (adapter
->link_speed
) {
2490 adapter
->tx_timeout_factor
= 16;
2494 /* maybe add some timeout factor ? */
2498 /* enable transmits in the hardware */
2500 tctl
|= E1000_TCTL_EN
;
2503 netif_carrier_on(netdev
);
2504 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2505 schedule_delayed_work(&adapter
->phy_info_task
,
2507 adapter
->smartspeed
= 0;
2510 if (netif_carrier_ok(netdev
)) {
2511 adapter
->link_speed
= 0;
2512 adapter
->link_duplex
= 0;
2513 pr_info("%s NIC Link is Down\n",
2515 netif_carrier_off(netdev
);
2517 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2518 schedule_delayed_work(&adapter
->phy_info_task
,
2522 e1000_smartspeed(adapter
);
2526 e1000_update_stats(adapter
);
2528 hw
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2529 adapter
->tpt_old
= adapter
->stats
.tpt
;
2530 hw
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2531 adapter
->colc_old
= adapter
->stats
.colc
;
2533 adapter
->gorcl
= adapter
->stats
.gorcl
- adapter
->gorcl_old
;
2534 adapter
->gorcl_old
= adapter
->stats
.gorcl
;
2535 adapter
->gotcl
= adapter
->stats
.gotcl
- adapter
->gotcl_old
;
2536 adapter
->gotcl_old
= adapter
->stats
.gotcl
;
2538 e1000_update_adaptive(hw
);
2540 if (!netif_carrier_ok(netdev
)) {
2541 if (E1000_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
2542 /* We've lost link, so the controller stops DMA,
2543 * but we've got queued Tx work that's never going
2544 * to get done, so reset controller to flush Tx.
2545 * (Do the reset outside of interrupt context). */
2546 adapter
->tx_timeout_count
++;
2547 schedule_work(&adapter
->reset_task
);
2548 /* exit immediately since reset is imminent */
2553 /* Simple mode for Interrupt Throttle Rate (ITR) */
2554 if (hw
->mac_type
>= e1000_82540
&& adapter
->itr_setting
== 4) {
2556 * Symmetric Tx/Rx gets a reduced ITR=2000;
2557 * Total asymmetrical Tx or Rx gets ITR=8000;
2558 * everyone else is between 2000-8000.
2560 u32 goc
= (adapter
->gotcl
+ adapter
->gorcl
) / 10000;
2561 u32 dif
= (adapter
->gotcl
> adapter
->gorcl
?
2562 adapter
->gotcl
- adapter
->gorcl
:
2563 adapter
->gorcl
- adapter
->gotcl
) / 10000;
2564 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
2566 ew32(ITR
, 1000000000 / (itr
* 256));
2569 /* Cause software interrupt to ensure rx ring is cleaned */
2570 ew32(ICS
, E1000_ICS_RXDMT0
);
2572 /* Force detection of hung controller every watchdog period */
2573 adapter
->detect_tx_hung
= true;
2575 /* Reschedule the task */
2576 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2577 schedule_delayed_work(&adapter
->watchdog_task
, 2 * HZ
);
2580 mutex_unlock(&adapter
->mutex
);
2583 enum latency_range
{
2587 latency_invalid
= 255
2591 * e1000_update_itr - update the dynamic ITR value based on statistics
2592 * @adapter: pointer to adapter
2593 * @itr_setting: current adapter->itr
2594 * @packets: the number of packets during this measurement interval
2595 * @bytes: the number of bytes during this measurement interval
2597 * Stores a new ITR value based on packets and byte
2598 * counts during the last interrupt. The advantage of per interrupt
2599 * computation is faster updates and more accurate ITR for the current
2600 * traffic pattern. Constants in this function were computed
2601 * based on theoretical maximum wire speed and thresholds were set based
2602 * on testing data as well as attempting to minimize response time
2603 * while increasing bulk throughput.
2604 * this functionality is controlled by the InterruptThrottleRate module
2605 * parameter (see e1000_param.c)
2607 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2608 u16 itr_setting
, int packets
, int bytes
)
2610 unsigned int retval
= itr_setting
;
2611 struct e1000_hw
*hw
= &adapter
->hw
;
2613 if (unlikely(hw
->mac_type
< e1000_82540
))
2614 goto update_itr_done
;
2617 goto update_itr_done
;
2619 switch (itr_setting
) {
2620 case lowest_latency
:
2621 /* jumbo frames get bulk treatment*/
2622 if (bytes
/packets
> 8000)
2623 retval
= bulk_latency
;
2624 else if ((packets
< 5) && (bytes
> 512))
2625 retval
= low_latency
;
2627 case low_latency
: /* 50 usec aka 20000 ints/s */
2628 if (bytes
> 10000) {
2629 /* jumbo frames need bulk latency setting */
2630 if (bytes
/packets
> 8000)
2631 retval
= bulk_latency
;
2632 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2633 retval
= bulk_latency
;
2634 else if ((packets
> 35))
2635 retval
= lowest_latency
;
2636 } else if (bytes
/packets
> 2000)
2637 retval
= bulk_latency
;
2638 else if (packets
<= 2 && bytes
< 512)
2639 retval
= lowest_latency
;
2641 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2642 if (bytes
> 25000) {
2644 retval
= low_latency
;
2645 } else if (bytes
< 6000) {
2646 retval
= low_latency
;
2655 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2657 struct e1000_hw
*hw
= &adapter
->hw
;
2659 u32 new_itr
= adapter
->itr
;
2661 if (unlikely(hw
->mac_type
< e1000_82540
))
2664 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2665 if (unlikely(adapter
->link_speed
!= SPEED_1000
)) {
2671 adapter
->tx_itr
= e1000_update_itr(adapter
,
2673 adapter
->total_tx_packets
,
2674 adapter
->total_tx_bytes
);
2675 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2676 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2677 adapter
->tx_itr
= low_latency
;
2679 adapter
->rx_itr
= e1000_update_itr(adapter
,
2681 adapter
->total_rx_packets
,
2682 adapter
->total_rx_bytes
);
2683 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2684 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2685 adapter
->rx_itr
= low_latency
;
2687 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2689 switch (current_itr
) {
2690 /* counts and packets in update_itr are dependent on these numbers */
2691 case lowest_latency
:
2695 new_itr
= 20000; /* aka hwitr = ~200 */
2705 if (new_itr
!= adapter
->itr
) {
2706 /* this attempts to bias the interrupt rate towards Bulk
2707 * by adding intermediate steps when interrupt rate is
2709 new_itr
= new_itr
> adapter
->itr
?
2710 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2712 adapter
->itr
= new_itr
;
2713 ew32(ITR
, 1000000000 / (new_itr
* 256));
2717 #define E1000_TX_FLAGS_CSUM 0x00000001
2718 #define E1000_TX_FLAGS_VLAN 0x00000002
2719 #define E1000_TX_FLAGS_TSO 0x00000004
2720 #define E1000_TX_FLAGS_IPV4 0x00000008
2721 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2722 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2723 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2725 static int e1000_tso(struct e1000_adapter
*adapter
,
2726 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2728 struct e1000_context_desc
*context_desc
;
2729 struct e1000_buffer
*buffer_info
;
2732 u16 ipcse
= 0, tucse
, mss
;
2733 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
2736 if (skb_is_gso(skb
)) {
2737 if (skb_header_cloned(skb
)) {
2738 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2743 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2744 mss
= skb_shinfo(skb
)->gso_size
;
2745 if (skb
->protocol
== htons(ETH_P_IP
)) {
2746 struct iphdr
*iph
= ip_hdr(skb
);
2749 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2753 cmd_length
= E1000_TXD_CMD_IP
;
2754 ipcse
= skb_transport_offset(skb
) - 1;
2755 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
2756 ipv6_hdr(skb
)->payload_len
= 0;
2757 tcp_hdr(skb
)->check
=
2758 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2759 &ipv6_hdr(skb
)->daddr
,
2763 ipcss
= skb_network_offset(skb
);
2764 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
2765 tucss
= skb_transport_offset(skb
);
2766 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
2769 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
2770 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
2772 i
= tx_ring
->next_to_use
;
2773 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2774 buffer_info
= &tx_ring
->buffer_info
[i
];
2776 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
2777 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
2778 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
2779 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
2780 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
2781 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
2782 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
2783 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
2784 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
2786 buffer_info
->time_stamp
= jiffies
;
2787 buffer_info
->next_to_watch
= i
;
2789 if (++i
== tx_ring
->count
) i
= 0;
2790 tx_ring
->next_to_use
= i
;
2797 static bool e1000_tx_csum(struct e1000_adapter
*adapter
,
2798 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2800 struct e1000_context_desc
*context_desc
;
2801 struct e1000_buffer
*buffer_info
;
2804 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
2806 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
2809 switch (skb
->protocol
) {
2810 case cpu_to_be16(ETH_P_IP
):
2811 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2812 cmd_len
|= E1000_TXD_CMD_TCP
;
2814 case cpu_to_be16(ETH_P_IPV6
):
2815 /* XXX not handling all IPV6 headers */
2816 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2817 cmd_len
|= E1000_TXD_CMD_TCP
;
2820 if (unlikely(net_ratelimit()))
2821 e_warn(drv
, "checksum_partial proto=%x!\n",
2826 css
= skb_checksum_start_offset(skb
);
2828 i
= tx_ring
->next_to_use
;
2829 buffer_info
= &tx_ring
->buffer_info
[i
];
2830 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2832 context_desc
->lower_setup
.ip_config
= 0;
2833 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
2834 context_desc
->upper_setup
.tcp_fields
.tucso
=
2835 css
+ skb
->csum_offset
;
2836 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
2837 context_desc
->tcp_seg_setup
.data
= 0;
2838 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
2840 buffer_info
->time_stamp
= jiffies
;
2841 buffer_info
->next_to_watch
= i
;
2843 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2844 tx_ring
->next_to_use
= i
;
2849 #define E1000_MAX_TXD_PWR 12
2850 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2852 static int e1000_tx_map(struct e1000_adapter
*adapter
,
2853 struct e1000_tx_ring
*tx_ring
,
2854 struct sk_buff
*skb
, unsigned int first
,
2855 unsigned int max_per_txd
, unsigned int nr_frags
,
2858 struct e1000_hw
*hw
= &adapter
->hw
;
2859 struct pci_dev
*pdev
= adapter
->pdev
;
2860 struct e1000_buffer
*buffer_info
;
2861 unsigned int len
= skb_headlen(skb
);
2862 unsigned int offset
= 0, size
, count
= 0, i
;
2863 unsigned int f
, bytecount
, segs
;
2865 i
= tx_ring
->next_to_use
;
2868 buffer_info
= &tx_ring
->buffer_info
[i
];
2869 size
= min(len
, max_per_txd
);
2870 /* Workaround for Controller erratum --
2871 * descriptor for non-tso packet in a linear SKB that follows a
2872 * tso gets written back prematurely before the data is fully
2873 * DMA'd to the controller */
2874 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&&
2876 tx_ring
->last_tx_tso
= false;
2880 /* Workaround for premature desc write-backs
2881 * in TSO mode. Append 4-byte sentinel desc */
2882 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
2884 /* work-around for errata 10 and it applies
2885 * to all controllers in PCI-X mode
2886 * The fix is to make sure that the first descriptor of a
2887 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2889 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
2890 (size
> 2015) && count
== 0))
2893 /* Workaround for potential 82544 hang in PCI-X. Avoid
2894 * terminating buffers within evenly-aligned dwords. */
2895 if (unlikely(adapter
->pcix_82544
&&
2896 !((unsigned long)(skb
->data
+ offset
+ size
- 1) & 4) &&
2900 buffer_info
->length
= size
;
2901 /* set time_stamp *before* dma to help avoid a possible race */
2902 buffer_info
->time_stamp
= jiffies
;
2903 buffer_info
->mapped_as_page
= false;
2904 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2906 size
, DMA_TO_DEVICE
);
2907 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2909 buffer_info
->next_to_watch
= i
;
2916 if (unlikely(i
== tx_ring
->count
))
2921 for (f
= 0; f
< nr_frags
; f
++) {
2922 const struct skb_frag_struct
*frag
;
2924 frag
= &skb_shinfo(skb
)->frags
[f
];
2925 len
= skb_frag_size(frag
);
2929 unsigned long bufend
;
2931 if (unlikely(i
== tx_ring
->count
))
2934 buffer_info
= &tx_ring
->buffer_info
[i
];
2935 size
= min(len
, max_per_txd
);
2936 /* Workaround for premature desc write-backs
2937 * in TSO mode. Append 4-byte sentinel desc */
2938 if (unlikely(mss
&& f
== (nr_frags
-1) && size
== len
&& size
> 8))
2940 /* Workaround for potential 82544 hang in PCI-X.
2941 * Avoid terminating buffers within evenly-aligned
2943 bufend
= (unsigned long)
2944 page_to_phys(skb_frag_page(frag
));
2945 bufend
+= offset
+ size
- 1;
2946 if (unlikely(adapter
->pcix_82544
&&
2951 buffer_info
->length
= size
;
2952 buffer_info
->time_stamp
= jiffies
;
2953 buffer_info
->mapped_as_page
= true;
2954 buffer_info
->dma
= skb_frag_dma_map(&pdev
->dev
, frag
,
2955 offset
, size
, DMA_TO_DEVICE
);
2956 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2958 buffer_info
->next_to_watch
= i
;
2966 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
2967 /* multiply data chunks by size of headers */
2968 bytecount
= ((segs
- 1) * skb_headlen(skb
)) + skb
->len
;
2970 tx_ring
->buffer_info
[i
].skb
= skb
;
2971 tx_ring
->buffer_info
[i
].segs
= segs
;
2972 tx_ring
->buffer_info
[i
].bytecount
= bytecount
;
2973 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2978 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2979 buffer_info
->dma
= 0;
2985 i
+= tx_ring
->count
;
2987 buffer_info
= &tx_ring
->buffer_info
[i
];
2988 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2994 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
2995 struct e1000_tx_ring
*tx_ring
, int tx_flags
,
2998 struct e1000_hw
*hw
= &adapter
->hw
;
2999 struct e1000_tx_desc
*tx_desc
= NULL
;
3000 struct e1000_buffer
*buffer_info
;
3001 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
3004 if (likely(tx_flags
& E1000_TX_FLAGS_TSO
)) {
3005 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
3007 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3009 if (likely(tx_flags
& E1000_TX_FLAGS_IPV4
))
3010 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
3013 if (likely(tx_flags
& E1000_TX_FLAGS_CSUM
)) {
3014 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
3015 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3018 if (unlikely(tx_flags
& E1000_TX_FLAGS_VLAN
)) {
3019 txd_lower
|= E1000_TXD_CMD_VLE
;
3020 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
3023 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
3024 txd_lower
&= ~(E1000_TXD_CMD_IFCS
);
3026 i
= tx_ring
->next_to_use
;
3029 buffer_info
= &tx_ring
->buffer_info
[i
];
3030 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3031 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
3032 tx_desc
->lower
.data
=
3033 cpu_to_le32(txd_lower
| buffer_info
->length
);
3034 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
3035 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3038 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
3040 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3041 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
3042 tx_desc
->lower
.data
&= ~(cpu_to_le32(E1000_TXD_CMD_IFCS
));
3044 /* Force memory writes to complete before letting h/w
3045 * know there are new descriptors to fetch. (Only
3046 * applicable for weak-ordered memory model archs,
3047 * such as IA-64). */
3050 tx_ring
->next_to_use
= i
;
3051 writel(i
, hw
->hw_addr
+ tx_ring
->tdt
);
3052 /* we need this if more than one processor can write to our tail
3053 * at a time, it syncronizes IO on IA64/Altix systems */
3057 /* 82547 workaround to avoid controller hang in half-duplex environment.
3058 * The workaround is to avoid queuing a large packet that would span
3059 * the internal Tx FIFO ring boundary by notifying the stack to resend
3060 * the packet at a later time. This gives the Tx FIFO an opportunity to
3061 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3062 * to the beginning of the Tx FIFO.
3065 #define E1000_FIFO_HDR 0x10
3066 #define E1000_82547_PAD_LEN 0x3E0
3068 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
3069 struct sk_buff
*skb
)
3071 u32 fifo_space
= adapter
->tx_fifo_size
- adapter
->tx_fifo_head
;
3072 u32 skb_fifo_len
= skb
->len
+ E1000_FIFO_HDR
;
3074 skb_fifo_len
= ALIGN(skb_fifo_len
, E1000_FIFO_HDR
);
3076 if (adapter
->link_duplex
!= HALF_DUPLEX
)
3077 goto no_fifo_stall_required
;
3079 if (atomic_read(&adapter
->tx_fifo_stall
))
3082 if (skb_fifo_len
>= (E1000_82547_PAD_LEN
+ fifo_space
)) {
3083 atomic_set(&adapter
->tx_fifo_stall
, 1);
3087 no_fifo_stall_required
:
3088 adapter
->tx_fifo_head
+= skb_fifo_len
;
3089 if (adapter
->tx_fifo_head
>= adapter
->tx_fifo_size
)
3090 adapter
->tx_fifo_head
-= adapter
->tx_fifo_size
;
3094 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
3096 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3097 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3099 netif_stop_queue(netdev
);
3100 /* Herbert's original patch had:
3101 * smp_mb__after_netif_stop_queue();
3102 * but since that doesn't exist yet, just open code it. */
3105 /* We need to check again in a case another CPU has just
3106 * made room available. */
3107 if (likely(E1000_DESC_UNUSED(tx_ring
) < size
))
3111 netif_start_queue(netdev
);
3112 ++adapter
->restart_queue
;
3116 static int e1000_maybe_stop_tx(struct net_device
*netdev
,
3117 struct e1000_tx_ring
*tx_ring
, int size
)
3119 if (likely(E1000_DESC_UNUSED(tx_ring
) >= size
))
3121 return __e1000_maybe_stop_tx(netdev
, size
);
3124 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3125 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
3126 struct net_device
*netdev
)
3128 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3129 struct e1000_hw
*hw
= &adapter
->hw
;
3130 struct e1000_tx_ring
*tx_ring
;
3131 unsigned int first
, max_per_txd
= E1000_MAX_DATA_PER_TXD
;
3132 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
3133 unsigned int tx_flags
= 0;
3134 unsigned int len
= skb_headlen(skb
);
3135 unsigned int nr_frags
;
3141 /* This goes back to the question of how to logically map a tx queue
3142 * to a flow. Right now, performance is impacted slightly negatively
3143 * if using multiple tx queues. If the stack breaks away from a
3144 * single qdisc implementation, we can look at this again. */
3145 tx_ring
= adapter
->tx_ring
;
3147 if (unlikely(skb
->len
<= 0)) {
3148 dev_kfree_skb_any(skb
);
3149 return NETDEV_TX_OK
;
3152 mss
= skb_shinfo(skb
)->gso_size
;
3153 /* The controller does a simple calculation to
3154 * make sure there is enough room in the FIFO before
3155 * initiating the DMA for each buffer. The calc is:
3156 * 4 = ceil(buffer len/mss). To make sure we don't
3157 * overrun the FIFO, adjust the max buffer len if mss
3161 max_per_txd
= min(mss
<< 2, max_per_txd
);
3162 max_txd_pwr
= fls(max_per_txd
) - 1;
3164 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3165 if (skb
->data_len
&& hdr_len
== len
) {
3166 switch (hw
->mac_type
) {
3167 unsigned int pull_size
;
3169 /* Make sure we have room to chop off 4 bytes,
3170 * and that the end alignment will work out to
3171 * this hardware's requirements
3172 * NOTE: this is a TSO only workaround
3173 * if end byte alignment not correct move us
3174 * into the next dword */
3175 if ((unsigned long)(skb_tail_pointer(skb
) - 1) & 4)
3178 pull_size
= min((unsigned int)4, skb
->data_len
);
3179 if (!__pskb_pull_tail(skb
, pull_size
)) {
3180 e_err(drv
, "__pskb_pull_tail "
3182 dev_kfree_skb_any(skb
);
3183 return NETDEV_TX_OK
;
3185 len
= skb_headlen(skb
);
3194 /* reserve a descriptor for the offload context */
3195 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
3199 /* Controller Erratum workaround */
3200 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&& !skb_is_gso(skb
))
3203 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
3205 if (adapter
->pcix_82544
)
3208 /* work-around for errata 10 and it applies to all controllers
3209 * in PCI-X mode, so add one more descriptor to the count
3211 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
3215 nr_frags
= skb_shinfo(skb
)->nr_frags
;
3216 for (f
= 0; f
< nr_frags
; f
++)
3217 count
+= TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb
)->frags
[f
]),
3219 if (adapter
->pcix_82544
)
3222 /* need: count + 2 desc gap to keep tail from touching
3223 * head, otherwise try next time */
3224 if (unlikely(e1000_maybe_stop_tx(netdev
, tx_ring
, count
+ 2)))
3225 return NETDEV_TX_BUSY
;
3227 if (unlikely((hw
->mac_type
== e1000_82547
) &&
3228 (e1000_82547_fifo_workaround(adapter
, skb
)))) {
3229 netif_stop_queue(netdev
);
3230 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3231 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
3232 return NETDEV_TX_BUSY
;
3235 if (vlan_tx_tag_present(skb
)) {
3236 tx_flags
|= E1000_TX_FLAGS_VLAN
;
3237 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
3240 first
= tx_ring
->next_to_use
;
3242 tso
= e1000_tso(adapter
, tx_ring
, skb
);
3244 dev_kfree_skb_any(skb
);
3245 return NETDEV_TX_OK
;
3249 if (likely(hw
->mac_type
!= e1000_82544
))
3250 tx_ring
->last_tx_tso
= true;
3251 tx_flags
|= E1000_TX_FLAGS_TSO
;
3252 } else if (likely(e1000_tx_csum(adapter
, tx_ring
, skb
)))
3253 tx_flags
|= E1000_TX_FLAGS_CSUM
;
3255 if (likely(skb
->protocol
== htons(ETH_P_IP
)))
3256 tx_flags
|= E1000_TX_FLAGS_IPV4
;
3258 if (unlikely(skb
->no_fcs
))
3259 tx_flags
|= E1000_TX_FLAGS_NO_FCS
;
3261 count
= e1000_tx_map(adapter
, tx_ring
, skb
, first
, max_per_txd
,
3265 skb_tx_timestamp(skb
);
3267 e1000_tx_queue(adapter
, tx_ring
, tx_flags
, count
);
3268 /* Make sure there is space in the ring for the next send. */
3269 e1000_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 2);
3272 dev_kfree_skb_any(skb
);
3273 tx_ring
->buffer_info
[first
].time_stamp
= 0;
3274 tx_ring
->next_to_use
= first
;
3277 return NETDEV_TX_OK
;
3280 #define NUM_REGS 38 /* 1 based count */
3281 static void e1000_regdump(struct e1000_adapter
*adapter
)
3283 struct e1000_hw
*hw
= &adapter
->hw
;
3285 u32
*regs_buff
= regs
;
3288 static const char * const reg_name
[] = {
3290 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3291 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3292 "TIDV", "TXDCTL", "TADV", "TARC0",
3293 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3295 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3296 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3297 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3300 regs_buff
[0] = er32(CTRL
);
3301 regs_buff
[1] = er32(STATUS
);
3303 regs_buff
[2] = er32(RCTL
);
3304 regs_buff
[3] = er32(RDLEN
);
3305 regs_buff
[4] = er32(RDH
);
3306 regs_buff
[5] = er32(RDT
);
3307 regs_buff
[6] = er32(RDTR
);
3309 regs_buff
[7] = er32(TCTL
);
3310 regs_buff
[8] = er32(TDBAL
);
3311 regs_buff
[9] = er32(TDBAH
);
3312 regs_buff
[10] = er32(TDLEN
);
3313 regs_buff
[11] = er32(TDH
);
3314 regs_buff
[12] = er32(TDT
);
3315 regs_buff
[13] = er32(TIDV
);
3316 regs_buff
[14] = er32(TXDCTL
);
3317 regs_buff
[15] = er32(TADV
);
3318 regs_buff
[16] = er32(TARC0
);
3320 regs_buff
[17] = er32(TDBAL1
);
3321 regs_buff
[18] = er32(TDBAH1
);
3322 regs_buff
[19] = er32(TDLEN1
);
3323 regs_buff
[20] = er32(TDH1
);
3324 regs_buff
[21] = er32(TDT1
);
3325 regs_buff
[22] = er32(TXDCTL1
);
3326 regs_buff
[23] = er32(TARC1
);
3327 regs_buff
[24] = er32(CTRL_EXT
);
3328 regs_buff
[25] = er32(ERT
);
3329 regs_buff
[26] = er32(RDBAL0
);
3330 regs_buff
[27] = er32(RDBAH0
);
3331 regs_buff
[28] = er32(TDFH
);
3332 regs_buff
[29] = er32(TDFT
);
3333 regs_buff
[30] = er32(TDFHS
);
3334 regs_buff
[31] = er32(TDFTS
);
3335 regs_buff
[32] = er32(TDFPC
);
3336 regs_buff
[33] = er32(RDFH
);
3337 regs_buff
[34] = er32(RDFT
);
3338 regs_buff
[35] = er32(RDFHS
);
3339 regs_buff
[36] = er32(RDFTS
);
3340 regs_buff
[37] = er32(RDFPC
);
3342 pr_info("Register dump\n");
3343 for (i
= 0; i
< NUM_REGS
; i
++)
3344 pr_info("%-15s %08x\n", reg_name
[i
], regs_buff
[i
]);
3348 * e1000_dump: Print registers, tx ring and rx ring
3350 static void e1000_dump(struct e1000_adapter
*adapter
)
3352 /* this code doesn't handle multiple rings */
3353 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3354 struct e1000_rx_ring
*rx_ring
= adapter
->rx_ring
;
3357 if (!netif_msg_hw(adapter
))
3360 /* Print Registers */
3361 e1000_regdump(adapter
);
3366 pr_info("TX Desc ring0 dump\n");
3368 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3370 * Legacy Transmit Descriptor
3371 * +--------------------------------------------------------------+
3372 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3373 * +--------------------------------------------------------------+
3374 * 8 | Special | CSS | Status | CMD | CSO | Length |
3375 * +--------------------------------------------------------------+
3376 * 63 48 47 36 35 32 31 24 23 16 15 0
3378 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3379 * 63 48 47 40 39 32 31 16 15 8 7 0
3380 * +----------------------------------------------------------------+
3381 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3382 * +----------------------------------------------------------------+
3383 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3384 * +----------------------------------------------------------------+
3385 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3387 * Extended Data Descriptor (DTYP=0x1)
3388 * +----------------------------------------------------------------+
3389 * 0 | Buffer Address [63:0] |
3390 * +----------------------------------------------------------------+
3391 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3392 * +----------------------------------------------------------------+
3393 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3395 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3396 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3398 if (!netif_msg_tx_done(adapter
))
3399 goto rx_ring_summary
;
3401 for (i
= 0; tx_ring
->desc
&& (i
< tx_ring
->count
); i
++) {
3402 struct e1000_tx_desc
*tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3403 struct e1000_buffer
*buffer_info
= &tx_ring
->buffer_info
[i
];
3404 struct my_u
{ __le64 a
; __le64 b
; };
3405 struct my_u
*u
= (struct my_u
*)tx_desc
;
3408 if (i
== tx_ring
->next_to_use
&& i
== tx_ring
->next_to_clean
)
3410 else if (i
== tx_ring
->next_to_use
)
3412 else if (i
== tx_ring
->next_to_clean
)
3417 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3418 ((le64_to_cpu(u
->b
) & (1<<20)) ? 'd' : 'c'), i
,
3419 le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3420 (u64
)buffer_info
->dma
, buffer_info
->length
,
3421 buffer_info
->next_to_watch
,
3422 (u64
)buffer_info
->time_stamp
, buffer_info
->skb
, type
);
3429 pr_info("\nRX Desc ring dump\n");
3431 /* Legacy Receive Descriptor Format
3433 * +-----------------------------------------------------+
3434 * | Buffer Address [63:0] |
3435 * +-----------------------------------------------------+
3436 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3437 * +-----------------------------------------------------+
3438 * 63 48 47 40 39 32 31 16 15 0
3440 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3442 if (!netif_msg_rx_status(adapter
))
3445 for (i
= 0; rx_ring
->desc
&& (i
< rx_ring
->count
); i
++) {
3446 struct e1000_rx_desc
*rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3447 struct e1000_buffer
*buffer_info
= &rx_ring
->buffer_info
[i
];
3448 struct my_u
{ __le64 a
; __le64 b
; };
3449 struct my_u
*u
= (struct my_u
*)rx_desc
;
3452 if (i
== rx_ring
->next_to_use
)
3454 else if (i
== rx_ring
->next_to_clean
)
3459 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3460 i
, le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3461 (u64
)buffer_info
->dma
, buffer_info
->skb
, type
);
3464 /* dump the descriptor caches */
3466 pr_info("Rx descriptor cache in 64bit format\n");
3467 for (i
= 0x6000; i
<= 0x63FF ; i
+= 0x10) {
3468 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3470 readl(adapter
->hw
.hw_addr
+ i
+4),
3471 readl(adapter
->hw
.hw_addr
+ i
),
3472 readl(adapter
->hw
.hw_addr
+ i
+12),
3473 readl(adapter
->hw
.hw_addr
+ i
+8));
3476 pr_info("Tx descriptor cache in 64bit format\n");
3477 for (i
= 0x7000; i
<= 0x73FF ; i
+= 0x10) {
3478 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3480 readl(adapter
->hw
.hw_addr
+ i
+4),
3481 readl(adapter
->hw
.hw_addr
+ i
),
3482 readl(adapter
->hw
.hw_addr
+ i
+12),
3483 readl(adapter
->hw
.hw_addr
+ i
+8));
3490 * e1000_tx_timeout - Respond to a Tx Hang
3491 * @netdev: network interface device structure
3494 static void e1000_tx_timeout(struct net_device
*netdev
)
3496 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3498 /* Do the reset outside of interrupt context */
3499 adapter
->tx_timeout_count
++;
3500 schedule_work(&adapter
->reset_task
);
3503 static void e1000_reset_task(struct work_struct
*work
)
3505 struct e1000_adapter
*adapter
=
3506 container_of(work
, struct e1000_adapter
, reset_task
);
3508 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
3510 e_err(drv
, "Reset adapter\n");
3511 e1000_reinit_safe(adapter
);
3515 * e1000_get_stats - Get System Network Statistics
3516 * @netdev: network interface device structure
3518 * Returns the address of the device statistics structure.
3519 * The statistics are actually updated from the watchdog.
3522 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
3524 /* only return the current stats */
3525 return &netdev
->stats
;
3529 * e1000_change_mtu - Change the Maximum Transfer Unit
3530 * @netdev: network interface device structure
3531 * @new_mtu: new value for maximum frame size
3533 * Returns 0 on success, negative on failure
3536 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
3538 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3539 struct e1000_hw
*hw
= &adapter
->hw
;
3540 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
3542 if ((max_frame
< MINIMUM_ETHERNET_FRAME_SIZE
) ||
3543 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3544 e_err(probe
, "Invalid MTU setting\n");
3548 /* Adapter-specific max frame size limits. */
3549 switch (hw
->mac_type
) {
3550 case e1000_undefined
... e1000_82542_rev2_1
:
3551 if (max_frame
> (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) {
3552 e_err(probe
, "Jumbo Frames not supported.\n");
3557 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3561 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
3563 /* e1000_down has a dependency on max_frame_size */
3564 hw
->max_frame_size
= max_frame
;
3565 if (netif_running(netdev
))
3566 e1000_down(adapter
);
3568 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3569 * means we reserve 2 more, this pushes us to allocate from the next
3571 * i.e. RXBUFFER_2048 --> size-4096 slab
3572 * however with the new *_jumbo_rx* routines, jumbo receives will use
3573 * fragmented skbs */
3575 if (max_frame
<= E1000_RXBUFFER_2048
)
3576 adapter
->rx_buffer_len
= E1000_RXBUFFER_2048
;
3578 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3579 adapter
->rx_buffer_len
= E1000_RXBUFFER_16384
;
3580 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3581 adapter
->rx_buffer_len
= PAGE_SIZE
;
3584 /* adjust allocation if LPE protects us, and we aren't using SBP */
3585 if (!hw
->tbi_compatibility_on
&&
3586 ((max_frame
== (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) ||
3587 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
)))
3588 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3590 pr_info("%s changing MTU from %d to %d\n",
3591 netdev
->name
, netdev
->mtu
, new_mtu
);
3592 netdev
->mtu
= new_mtu
;
3594 if (netif_running(netdev
))
3597 e1000_reset(adapter
);
3599 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
3605 * e1000_update_stats - Update the board statistics counters
3606 * @adapter: board private structure
3609 void e1000_update_stats(struct e1000_adapter
*adapter
)
3611 struct net_device
*netdev
= adapter
->netdev
;
3612 struct e1000_hw
*hw
= &adapter
->hw
;
3613 struct pci_dev
*pdev
= adapter
->pdev
;
3614 unsigned long flags
;
3617 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3620 * Prevent stats update while adapter is being reset, or if the pci
3621 * connection is down.
3623 if (adapter
->link_speed
== 0)
3625 if (pci_channel_offline(pdev
))
3628 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3630 /* these counters are modified from e1000_tbi_adjust_stats,
3631 * called from the interrupt context, so they must only
3632 * be written while holding adapter->stats_lock
3635 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3636 adapter
->stats
.gprc
+= er32(GPRC
);
3637 adapter
->stats
.gorcl
+= er32(GORCL
);
3638 adapter
->stats
.gorch
+= er32(GORCH
);
3639 adapter
->stats
.bprc
+= er32(BPRC
);
3640 adapter
->stats
.mprc
+= er32(MPRC
);
3641 adapter
->stats
.roc
+= er32(ROC
);
3643 adapter
->stats
.prc64
+= er32(PRC64
);
3644 adapter
->stats
.prc127
+= er32(PRC127
);
3645 adapter
->stats
.prc255
+= er32(PRC255
);
3646 adapter
->stats
.prc511
+= er32(PRC511
);
3647 adapter
->stats
.prc1023
+= er32(PRC1023
);
3648 adapter
->stats
.prc1522
+= er32(PRC1522
);
3650 adapter
->stats
.symerrs
+= er32(SYMERRS
);
3651 adapter
->stats
.mpc
+= er32(MPC
);
3652 adapter
->stats
.scc
+= er32(SCC
);
3653 adapter
->stats
.ecol
+= er32(ECOL
);
3654 adapter
->stats
.mcc
+= er32(MCC
);
3655 adapter
->stats
.latecol
+= er32(LATECOL
);
3656 adapter
->stats
.dc
+= er32(DC
);
3657 adapter
->stats
.sec
+= er32(SEC
);
3658 adapter
->stats
.rlec
+= er32(RLEC
);
3659 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3660 adapter
->stats
.xontxc
+= er32(XONTXC
);
3661 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3662 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3663 adapter
->stats
.fcruc
+= er32(FCRUC
);
3664 adapter
->stats
.gptc
+= er32(GPTC
);
3665 adapter
->stats
.gotcl
+= er32(GOTCL
);
3666 adapter
->stats
.gotch
+= er32(GOTCH
);
3667 adapter
->stats
.rnbc
+= er32(RNBC
);
3668 adapter
->stats
.ruc
+= er32(RUC
);
3669 adapter
->stats
.rfc
+= er32(RFC
);
3670 adapter
->stats
.rjc
+= er32(RJC
);
3671 adapter
->stats
.torl
+= er32(TORL
);
3672 adapter
->stats
.torh
+= er32(TORH
);
3673 adapter
->stats
.totl
+= er32(TOTL
);
3674 adapter
->stats
.toth
+= er32(TOTH
);
3675 adapter
->stats
.tpr
+= er32(TPR
);
3677 adapter
->stats
.ptc64
+= er32(PTC64
);
3678 adapter
->stats
.ptc127
+= er32(PTC127
);
3679 adapter
->stats
.ptc255
+= er32(PTC255
);
3680 adapter
->stats
.ptc511
+= er32(PTC511
);
3681 adapter
->stats
.ptc1023
+= er32(PTC1023
);
3682 adapter
->stats
.ptc1522
+= er32(PTC1522
);
3684 adapter
->stats
.mptc
+= er32(MPTC
);
3685 adapter
->stats
.bptc
+= er32(BPTC
);
3687 /* used for adaptive IFS */
3689 hw
->tx_packet_delta
= er32(TPT
);
3690 adapter
->stats
.tpt
+= hw
->tx_packet_delta
;
3691 hw
->collision_delta
= er32(COLC
);
3692 adapter
->stats
.colc
+= hw
->collision_delta
;
3694 if (hw
->mac_type
>= e1000_82543
) {
3695 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3696 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3697 adapter
->stats
.tncrs
+= er32(TNCRS
);
3698 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3699 adapter
->stats
.tsctc
+= er32(TSCTC
);
3700 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3703 /* Fill out the OS statistics structure */
3704 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3705 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3709 /* RLEC on some newer hardware can be incorrect so build
3710 * our own version based on RUC and ROC */
3711 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3712 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3713 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3714 adapter
->stats
.cexterr
;
3715 adapter
->stats
.rlerrc
= adapter
->stats
.ruc
+ adapter
->stats
.roc
;
3716 netdev
->stats
.rx_length_errors
= adapter
->stats
.rlerrc
;
3717 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3718 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3719 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3722 adapter
->stats
.txerrc
= adapter
->stats
.ecol
+ adapter
->stats
.latecol
;
3723 netdev
->stats
.tx_errors
= adapter
->stats
.txerrc
;
3724 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3725 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3726 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3727 if (hw
->bad_tx_carr_stats_fd
&&
3728 adapter
->link_duplex
== FULL_DUPLEX
) {
3729 netdev
->stats
.tx_carrier_errors
= 0;
3730 adapter
->stats
.tncrs
= 0;
3733 /* Tx Dropped needs to be maintained elsewhere */
3736 if (hw
->media_type
== e1000_media_type_copper
) {
3737 if ((adapter
->link_speed
== SPEED_1000
) &&
3738 (!e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_tmp
))) {
3739 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3740 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3743 if ((hw
->mac_type
<= e1000_82546
) &&
3744 (hw
->phy_type
== e1000_phy_m88
) &&
3745 !e1000_read_phy_reg(hw
, M88E1000_RX_ERR_CNTR
, &phy_tmp
))
3746 adapter
->phy_stats
.receive_errors
+= phy_tmp
;
3749 /* Management Stats */
3750 if (hw
->has_smbus
) {
3751 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3752 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3753 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3756 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
3760 * e1000_intr - Interrupt Handler
3761 * @irq: interrupt number
3762 * @data: pointer to a network interface device structure
3765 static irqreturn_t
e1000_intr(int irq
, void *data
)
3767 struct net_device
*netdev
= data
;
3768 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3769 struct e1000_hw
*hw
= &adapter
->hw
;
3770 u32 icr
= er32(ICR
);
3772 if (unlikely((!icr
)))
3773 return IRQ_NONE
; /* Not our interrupt */
3776 * we might have caused the interrupt, but the above
3777 * read cleared it, and just in case the driver is
3778 * down there is nothing to do so return handled
3780 if (unlikely(test_bit(__E1000_DOWN
, &adapter
->flags
)))
3783 if (unlikely(icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
))) {
3784 hw
->get_link_status
= 1;
3785 /* guard against interrupt when we're going down */
3786 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3787 schedule_delayed_work(&adapter
->watchdog_task
, 1);
3790 /* disable interrupts, without the synchronize_irq bit */
3792 E1000_WRITE_FLUSH();
3794 if (likely(napi_schedule_prep(&adapter
->napi
))) {
3795 adapter
->total_tx_bytes
= 0;
3796 adapter
->total_tx_packets
= 0;
3797 adapter
->total_rx_bytes
= 0;
3798 adapter
->total_rx_packets
= 0;
3799 __napi_schedule(&adapter
->napi
);
3801 /* this really should not happen! if it does it is basically a
3802 * bug, but not a hard error, so enable ints and continue */
3803 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3804 e1000_irq_enable(adapter
);
3811 * e1000_clean - NAPI Rx polling callback
3812 * @adapter: board private structure
3814 static int e1000_clean(struct napi_struct
*napi
, int budget
)
3816 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
3817 int tx_clean_complete
= 0, work_done
= 0;
3819 tx_clean_complete
= e1000_clean_tx_irq(adapter
, &adapter
->tx_ring
[0]);
3821 adapter
->clean_rx(adapter
, &adapter
->rx_ring
[0], &work_done
, budget
);
3823 if (!tx_clean_complete
)
3826 /* If budget not fully consumed, exit the polling mode */
3827 if (work_done
< budget
) {
3828 if (likely(adapter
->itr_setting
& 3))
3829 e1000_set_itr(adapter
);
3830 napi_complete(napi
);
3831 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3832 e1000_irq_enable(adapter
);
3839 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3840 * @adapter: board private structure
3842 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
3843 struct e1000_tx_ring
*tx_ring
)
3845 struct e1000_hw
*hw
= &adapter
->hw
;
3846 struct net_device
*netdev
= adapter
->netdev
;
3847 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
3848 struct e1000_buffer
*buffer_info
;
3849 unsigned int i
, eop
;
3850 unsigned int count
= 0;
3851 unsigned int total_tx_bytes
=0, total_tx_packets
=0;
3853 i
= tx_ring
->next_to_clean
;
3854 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3855 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3857 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3858 (count
< tx_ring
->count
)) {
3859 bool cleaned
= false;
3860 rmb(); /* read buffer_info after eop_desc */
3861 for ( ; !cleaned
; count
++) {
3862 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3863 buffer_info
= &tx_ring
->buffer_info
[i
];
3864 cleaned
= (i
== eop
);
3867 total_tx_packets
+= buffer_info
->segs
;
3868 total_tx_bytes
+= buffer_info
->bytecount
;
3870 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
3871 tx_desc
->upper
.data
= 0;
3873 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3876 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3877 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3880 tx_ring
->next_to_clean
= i
;
3882 #define TX_WAKE_THRESHOLD 32
3883 if (unlikely(count
&& netif_carrier_ok(netdev
) &&
3884 E1000_DESC_UNUSED(tx_ring
) >= TX_WAKE_THRESHOLD
)) {
3885 /* Make sure that anybody stopping the queue after this
3886 * sees the new next_to_clean.
3890 if (netif_queue_stopped(netdev
) &&
3891 !(test_bit(__E1000_DOWN
, &adapter
->flags
))) {
3892 netif_wake_queue(netdev
);
3893 ++adapter
->restart_queue
;
3897 if (adapter
->detect_tx_hung
) {
3898 /* Detect a transmit hang in hardware, this serializes the
3899 * check with the clearing of time_stamp and movement of i */
3900 adapter
->detect_tx_hung
= false;
3901 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
3902 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+
3903 (adapter
->tx_timeout_factor
* HZ
)) &&
3904 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
3906 /* detected Tx unit hang */
3907 e_err(drv
, "Detected Tx Unit Hang\n"
3911 " next_to_use <%x>\n"
3912 " next_to_clean <%x>\n"
3913 "buffer_info[next_to_clean]\n"
3914 " time_stamp <%lx>\n"
3915 " next_to_watch <%x>\n"
3917 " next_to_watch.status <%x>\n",
3918 (unsigned long)((tx_ring
- adapter
->tx_ring
) /
3919 sizeof(struct e1000_tx_ring
)),
3920 readl(hw
->hw_addr
+ tx_ring
->tdh
),
3921 readl(hw
->hw_addr
+ tx_ring
->tdt
),
3922 tx_ring
->next_to_use
,
3923 tx_ring
->next_to_clean
,
3924 tx_ring
->buffer_info
[eop
].time_stamp
,
3927 eop_desc
->upper
.fields
.status
);
3928 e1000_dump(adapter
);
3929 netif_stop_queue(netdev
);
3932 adapter
->total_tx_bytes
+= total_tx_bytes
;
3933 adapter
->total_tx_packets
+= total_tx_packets
;
3934 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
3935 netdev
->stats
.tx_packets
+= total_tx_packets
;
3936 return count
< tx_ring
->count
;
3940 * e1000_rx_checksum - Receive Checksum Offload for 82543
3941 * @adapter: board private structure
3942 * @status_err: receive descriptor status and error fields
3943 * @csum: receive descriptor csum field
3944 * @sk_buff: socket buffer with received data
3947 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
3948 u32 csum
, struct sk_buff
*skb
)
3950 struct e1000_hw
*hw
= &adapter
->hw
;
3951 u16 status
= (u16
)status_err
;
3952 u8 errors
= (u8
)(status_err
>> 24);
3954 skb_checksum_none_assert(skb
);
3956 /* 82543 or newer only */
3957 if (unlikely(hw
->mac_type
< e1000_82543
)) return;
3958 /* Ignore Checksum bit is set */
3959 if (unlikely(status
& E1000_RXD_STAT_IXSM
)) return;
3960 /* TCP/UDP checksum error bit is set */
3961 if (unlikely(errors
& E1000_RXD_ERR_TCPE
)) {
3962 /* let the stack verify checksum errors */
3963 adapter
->hw_csum_err
++;
3966 /* TCP/UDP Checksum has not been calculated */
3967 if (!(status
& E1000_RXD_STAT_TCPCS
))
3970 /* It must be a TCP or UDP packet with a valid checksum */
3971 if (likely(status
& E1000_RXD_STAT_TCPCS
)) {
3972 /* TCP checksum is good */
3973 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3975 adapter
->hw_csum_good
++;
3979 * e1000_consume_page - helper function
3981 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
3986 skb
->data_len
+= length
;
3987 skb
->truesize
+= PAGE_SIZE
;
3991 * e1000_receive_skb - helper function to handle rx indications
3992 * @adapter: board private structure
3993 * @status: descriptor status field as written by hardware
3994 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3995 * @skb: pointer to sk_buff to be indicated to stack
3997 static void e1000_receive_skb(struct e1000_adapter
*adapter
, u8 status
,
3998 __le16 vlan
, struct sk_buff
*skb
)
4000 skb
->protocol
= eth_type_trans(skb
, adapter
->netdev
);
4002 if (status
& E1000_RXD_STAT_VP
) {
4003 u16 vid
= le16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
;
4005 __vlan_hwaccel_put_tag(skb
, vid
);
4007 napi_gro_receive(&adapter
->napi
, skb
);
4011 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4012 * @adapter: board private structure
4013 * @rx_ring: ring to clean
4014 * @work_done: amount of napi work completed this call
4015 * @work_to_do: max amount of work allowed for this call to do
4017 * the return value indicates whether actual cleaning was done, there
4018 * is no guarantee that everything was cleaned
4020 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
4021 struct e1000_rx_ring
*rx_ring
,
4022 int *work_done
, int work_to_do
)
4024 struct e1000_hw
*hw
= &adapter
->hw
;
4025 struct net_device
*netdev
= adapter
->netdev
;
4026 struct pci_dev
*pdev
= adapter
->pdev
;
4027 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4028 struct e1000_buffer
*buffer_info
, *next_buffer
;
4029 unsigned long irq_flags
;
4032 int cleaned_count
= 0;
4033 bool cleaned
= false;
4034 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4036 i
= rx_ring
->next_to_clean
;
4037 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4038 buffer_info
= &rx_ring
->buffer_info
[i
];
4040 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4041 struct sk_buff
*skb
;
4044 if (*work_done
>= work_to_do
)
4047 rmb(); /* read descriptor and rx_buffer_info after status DD */
4049 status
= rx_desc
->status
;
4050 skb
= buffer_info
->skb
;
4051 buffer_info
->skb
= NULL
;
4053 if (++i
== rx_ring
->count
) i
= 0;
4054 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4057 next_buffer
= &rx_ring
->buffer_info
[i
];
4061 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
4062 buffer_info
->length
, DMA_FROM_DEVICE
);
4063 buffer_info
->dma
= 0;
4065 length
= le16_to_cpu(rx_desc
->length
);
4067 /* errors is only valid for DD + EOP descriptors */
4068 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
4069 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
4073 mapped
= page_address(buffer_info
->page
);
4074 last_byte
= *(mapped
+ length
- 1);
4075 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4077 spin_lock_irqsave(&adapter
->stats_lock
,
4079 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4081 spin_unlock_irqrestore(&adapter
->stats_lock
,
4085 if (netdev
->features
& NETIF_F_RXALL
)
4087 /* recycle both page and skb */
4088 buffer_info
->skb
= skb
;
4089 /* an error means any chain goes out the window
4091 if (rx_ring
->rx_skb_top
)
4092 dev_kfree_skb(rx_ring
->rx_skb_top
);
4093 rx_ring
->rx_skb_top
= NULL
;
4098 #define rxtop rx_ring->rx_skb_top
4100 if (!(status
& E1000_RXD_STAT_EOP
)) {
4101 /* this descriptor is only the beginning (or middle) */
4103 /* this is the beginning of a chain */
4105 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
4108 /* this is the middle of a chain */
4109 skb_fill_page_desc(rxtop
,
4110 skb_shinfo(rxtop
)->nr_frags
,
4111 buffer_info
->page
, 0, length
);
4112 /* re-use the skb, only consumed the page */
4113 buffer_info
->skb
= skb
;
4115 e1000_consume_page(buffer_info
, rxtop
, length
);
4119 /* end of the chain */
4120 skb_fill_page_desc(rxtop
,
4121 skb_shinfo(rxtop
)->nr_frags
,
4122 buffer_info
->page
, 0, length
);
4123 /* re-use the current skb, we only consumed the
4125 buffer_info
->skb
= skb
;
4128 e1000_consume_page(buffer_info
, skb
, length
);
4130 /* no chain, got EOP, this buf is the packet
4131 * copybreak to save the put_page/alloc_page */
4132 if (length
<= copybreak
&&
4133 skb_tailroom(skb
) >= length
) {
4135 vaddr
= kmap_atomic(buffer_info
->page
);
4136 memcpy(skb_tail_pointer(skb
), vaddr
, length
);
4137 kunmap_atomic(vaddr
);
4138 /* re-use the page, so don't erase
4139 * buffer_info->page */
4140 skb_put(skb
, length
);
4142 skb_fill_page_desc(skb
, 0,
4143 buffer_info
->page
, 0,
4145 e1000_consume_page(buffer_info
, skb
,
4151 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4152 e1000_rx_checksum(adapter
,
4154 ((u32
)(rx_desc
->errors
) << 24),
4155 le16_to_cpu(rx_desc
->csum
), skb
);
4157 total_rx_bytes
+= (skb
->len
- 4); /* don't count FCS */
4158 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4159 pskb_trim(skb
, skb
->len
- 4);
4162 /* eth type trans needs skb->data to point to something */
4163 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
4164 e_err(drv
, "pskb_may_pull failed.\n");
4169 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4172 rx_desc
->status
= 0;
4174 /* return some buffers to hardware, one at a time is too slow */
4175 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4176 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4180 /* use prefetched values */
4182 buffer_info
= next_buffer
;
4184 rx_ring
->next_to_clean
= i
;
4186 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4188 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4190 adapter
->total_rx_packets
+= total_rx_packets
;
4191 adapter
->total_rx_bytes
+= total_rx_bytes
;
4192 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4193 netdev
->stats
.rx_packets
+= total_rx_packets
;
4198 * this should improve performance for small packets with large amounts
4199 * of reassembly being done in the stack
4201 static void e1000_check_copybreak(struct net_device
*netdev
,
4202 struct e1000_buffer
*buffer_info
,
4203 u32 length
, struct sk_buff
**skb
)
4205 struct sk_buff
*new_skb
;
4207 if (length
> copybreak
)
4210 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
4214 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
4215 (*skb
)->data
- NET_IP_ALIGN
,
4216 length
+ NET_IP_ALIGN
);
4217 /* save the skb in buffer_info as good */
4218 buffer_info
->skb
= *skb
;
4223 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4224 * @adapter: board private structure
4225 * @rx_ring: ring to clean
4226 * @work_done: amount of napi work completed this call
4227 * @work_to_do: max amount of work allowed for this call to do
4229 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
4230 struct e1000_rx_ring
*rx_ring
,
4231 int *work_done
, int work_to_do
)
4233 struct e1000_hw
*hw
= &adapter
->hw
;
4234 struct net_device
*netdev
= adapter
->netdev
;
4235 struct pci_dev
*pdev
= adapter
->pdev
;
4236 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4237 struct e1000_buffer
*buffer_info
, *next_buffer
;
4238 unsigned long flags
;
4241 int cleaned_count
= 0;
4242 bool cleaned
= false;
4243 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4245 i
= rx_ring
->next_to_clean
;
4246 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4247 buffer_info
= &rx_ring
->buffer_info
[i
];
4249 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4250 struct sk_buff
*skb
;
4253 if (*work_done
>= work_to_do
)
4256 rmb(); /* read descriptor and rx_buffer_info after status DD */
4258 status
= rx_desc
->status
;
4259 skb
= buffer_info
->skb
;
4260 buffer_info
->skb
= NULL
;
4262 prefetch(skb
->data
- NET_IP_ALIGN
);
4264 if (++i
== rx_ring
->count
) i
= 0;
4265 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4268 next_buffer
= &rx_ring
->buffer_info
[i
];
4272 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4273 buffer_info
->length
, DMA_FROM_DEVICE
);
4274 buffer_info
->dma
= 0;
4276 length
= le16_to_cpu(rx_desc
->length
);
4277 /* !EOP means multiple descriptors were used to store a single
4278 * packet, if thats the case we need to toss it. In fact, we
4279 * to toss every packet with the EOP bit clear and the next
4280 * frame that _does_ have the EOP bit set, as it is by
4281 * definition only a frame fragment
4283 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
4284 adapter
->discarding
= true;
4286 if (adapter
->discarding
) {
4287 /* All receives must fit into a single buffer */
4288 e_dbg("Receive packet consumed multiple buffers\n");
4290 buffer_info
->skb
= skb
;
4291 if (status
& E1000_RXD_STAT_EOP
)
4292 adapter
->discarding
= false;
4296 if (unlikely(rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
)) {
4297 u8 last_byte
= *(skb
->data
+ length
- 1);
4298 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4300 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4301 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4303 spin_unlock_irqrestore(&adapter
->stats_lock
,
4307 if (netdev
->features
& NETIF_F_RXALL
)
4310 buffer_info
->skb
= skb
;
4316 total_rx_bytes
+= (length
- 4); /* don't count FCS */
4319 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4320 /* adjust length to remove Ethernet CRC, this must be
4321 * done after the TBI_ACCEPT workaround above
4325 e1000_check_copybreak(netdev
, buffer_info
, length
, &skb
);
4327 skb_put(skb
, length
);
4329 /* Receive Checksum Offload */
4330 e1000_rx_checksum(adapter
,
4332 ((u32
)(rx_desc
->errors
) << 24),
4333 le16_to_cpu(rx_desc
->csum
), skb
);
4335 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4338 rx_desc
->status
= 0;
4340 /* return some buffers to hardware, one at a time is too slow */
4341 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4342 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4346 /* use prefetched values */
4348 buffer_info
= next_buffer
;
4350 rx_ring
->next_to_clean
= i
;
4352 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4354 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4356 adapter
->total_rx_packets
+= total_rx_packets
;
4357 adapter
->total_rx_bytes
+= total_rx_bytes
;
4358 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4359 netdev
->stats
.rx_packets
+= total_rx_packets
;
4364 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4365 * @adapter: address of board private structure
4366 * @rx_ring: pointer to receive ring structure
4367 * @cleaned_count: number of buffers to allocate this pass
4371 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
4372 struct e1000_rx_ring
*rx_ring
, int cleaned_count
)
4374 struct net_device
*netdev
= adapter
->netdev
;
4375 struct pci_dev
*pdev
= adapter
->pdev
;
4376 struct e1000_rx_desc
*rx_desc
;
4377 struct e1000_buffer
*buffer_info
;
4378 struct sk_buff
*skb
;
4380 unsigned int bufsz
= 256 - 16 /*for skb_reserve */ ;
4382 i
= rx_ring
->next_to_use
;
4383 buffer_info
= &rx_ring
->buffer_info
[i
];
4385 while (cleaned_count
--) {
4386 skb
= buffer_info
->skb
;
4392 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4393 if (unlikely(!skb
)) {
4394 /* Better luck next round */
4395 adapter
->alloc_rx_buff_failed
++;
4399 buffer_info
->skb
= skb
;
4400 buffer_info
->length
= adapter
->rx_buffer_len
;
4402 /* allocate a new page if necessary */
4403 if (!buffer_info
->page
) {
4404 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4405 if (unlikely(!buffer_info
->page
)) {
4406 adapter
->alloc_rx_buff_failed
++;
4411 if (!buffer_info
->dma
) {
4412 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
4413 buffer_info
->page
, 0,
4414 buffer_info
->length
,
4416 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4417 put_page(buffer_info
->page
);
4419 buffer_info
->page
= NULL
;
4420 buffer_info
->skb
= NULL
;
4421 buffer_info
->dma
= 0;
4422 adapter
->alloc_rx_buff_failed
++;
4423 break; /* while !buffer_info->skb */
4427 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4428 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4430 if (unlikely(++i
== rx_ring
->count
))
4432 buffer_info
= &rx_ring
->buffer_info
[i
];
4435 if (likely(rx_ring
->next_to_use
!= i
)) {
4436 rx_ring
->next_to_use
= i
;
4437 if (unlikely(i
-- == 0))
4438 i
= (rx_ring
->count
- 1);
4440 /* Force memory writes to complete before letting h/w
4441 * know there are new descriptors to fetch. (Only
4442 * applicable for weak-ordered memory model archs,
4443 * such as IA-64). */
4445 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->rdt
);
4450 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4451 * @adapter: address of board private structure
4454 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
4455 struct e1000_rx_ring
*rx_ring
,
4458 struct e1000_hw
*hw
= &adapter
->hw
;
4459 struct net_device
*netdev
= adapter
->netdev
;
4460 struct pci_dev
*pdev
= adapter
->pdev
;
4461 struct e1000_rx_desc
*rx_desc
;
4462 struct e1000_buffer
*buffer_info
;
4463 struct sk_buff
*skb
;
4465 unsigned int bufsz
= adapter
->rx_buffer_len
;
4467 i
= rx_ring
->next_to_use
;
4468 buffer_info
= &rx_ring
->buffer_info
[i
];
4470 while (cleaned_count
--) {
4471 skb
= buffer_info
->skb
;
4477 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4478 if (unlikely(!skb
)) {
4479 /* Better luck next round */
4480 adapter
->alloc_rx_buff_failed
++;
4484 /* Fix for errata 23, can't cross 64kB boundary */
4485 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4486 struct sk_buff
*oldskb
= skb
;
4487 e_err(rx_err
, "skb align check failed: %u bytes at "
4488 "%p\n", bufsz
, skb
->data
);
4489 /* Try again, without freeing the previous */
4490 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4491 /* Failed allocation, critical failure */
4493 dev_kfree_skb(oldskb
);
4494 adapter
->alloc_rx_buff_failed
++;
4498 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4501 dev_kfree_skb(oldskb
);
4502 adapter
->alloc_rx_buff_failed
++;
4503 break; /* while !buffer_info->skb */
4506 /* Use new allocation */
4507 dev_kfree_skb(oldskb
);
4509 buffer_info
->skb
= skb
;
4510 buffer_info
->length
= adapter
->rx_buffer_len
;
4512 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4514 buffer_info
->length
,
4516 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4518 buffer_info
->skb
= NULL
;
4519 buffer_info
->dma
= 0;
4520 adapter
->alloc_rx_buff_failed
++;
4521 break; /* while !buffer_info->skb */
4525 * XXX if it was allocated cleanly it will never map to a
4529 /* Fix for errata 23, can't cross 64kB boundary */
4530 if (!e1000_check_64k_bound(adapter
,
4531 (void *)(unsigned long)buffer_info
->dma
,
4532 adapter
->rx_buffer_len
)) {
4533 e_err(rx_err
, "dma align check failed: %u bytes at "
4534 "%p\n", adapter
->rx_buffer_len
,
4535 (void *)(unsigned long)buffer_info
->dma
);
4537 buffer_info
->skb
= NULL
;
4539 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4540 adapter
->rx_buffer_len
,
4542 buffer_info
->dma
= 0;
4544 adapter
->alloc_rx_buff_failed
++;
4545 break; /* while !buffer_info->skb */
4547 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4548 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4550 if (unlikely(++i
== rx_ring
->count
))
4552 buffer_info
= &rx_ring
->buffer_info
[i
];
4555 if (likely(rx_ring
->next_to_use
!= i
)) {
4556 rx_ring
->next_to_use
= i
;
4557 if (unlikely(i
-- == 0))
4558 i
= (rx_ring
->count
- 1);
4560 /* Force memory writes to complete before letting h/w
4561 * know there are new descriptors to fetch. (Only
4562 * applicable for weak-ordered memory model archs,
4563 * such as IA-64). */
4565 writel(i
, hw
->hw_addr
+ rx_ring
->rdt
);
4570 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4574 static void e1000_smartspeed(struct e1000_adapter
*adapter
)
4576 struct e1000_hw
*hw
= &adapter
->hw
;
4580 if ((hw
->phy_type
!= e1000_phy_igp
) || !hw
->autoneg
||
4581 !(hw
->autoneg_advertised
& ADVERTISE_1000_FULL
))
4584 if (adapter
->smartspeed
== 0) {
4585 /* If Master/Slave config fault is asserted twice,
4586 * we assume back-to-back */
4587 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4588 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4589 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4590 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4591 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4592 if (phy_ctrl
& CR_1000T_MS_ENABLE
) {
4593 phy_ctrl
&= ~CR_1000T_MS_ENABLE
;
4594 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
,
4596 adapter
->smartspeed
++;
4597 if (!e1000_phy_setup_autoneg(hw
) &&
4598 !e1000_read_phy_reg(hw
, PHY_CTRL
,
4600 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4601 MII_CR_RESTART_AUTO_NEG
);
4602 e1000_write_phy_reg(hw
, PHY_CTRL
,
4607 } else if (adapter
->smartspeed
== E1000_SMARTSPEED_DOWNSHIFT
) {
4608 /* If still no link, perhaps using 2/3 pair cable */
4609 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4610 phy_ctrl
|= CR_1000T_MS_ENABLE
;
4611 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
, phy_ctrl
);
4612 if (!e1000_phy_setup_autoneg(hw
) &&
4613 !e1000_read_phy_reg(hw
, PHY_CTRL
, &phy_ctrl
)) {
4614 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4615 MII_CR_RESTART_AUTO_NEG
);
4616 e1000_write_phy_reg(hw
, PHY_CTRL
, phy_ctrl
);
4619 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4620 if (adapter
->smartspeed
++ == E1000_SMARTSPEED_MAX
)
4621 adapter
->smartspeed
= 0;
4631 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4637 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4650 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4653 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4654 struct e1000_hw
*hw
= &adapter
->hw
;
4655 struct mii_ioctl_data
*data
= if_mii(ifr
);
4658 unsigned long flags
;
4660 if (hw
->media_type
!= e1000_media_type_copper
)
4665 data
->phy_id
= hw
->phy_addr
;
4668 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4669 if (e1000_read_phy_reg(hw
, data
->reg_num
& 0x1F,
4671 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4674 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4677 if (data
->reg_num
& ~(0x1F))
4679 mii_reg
= data
->val_in
;
4680 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4681 if (e1000_write_phy_reg(hw
, data
->reg_num
,
4683 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4686 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4687 if (hw
->media_type
== e1000_media_type_copper
) {
4688 switch (data
->reg_num
) {
4690 if (mii_reg
& MII_CR_POWER_DOWN
)
4692 if (mii_reg
& MII_CR_AUTO_NEG_EN
) {
4694 hw
->autoneg_advertised
= 0x2F;
4699 else if (mii_reg
& 0x2000)
4703 retval
= e1000_set_spd_dplx(
4711 if (netif_running(adapter
->netdev
))
4712 e1000_reinit_locked(adapter
);
4714 e1000_reset(adapter
);
4716 case M88E1000_PHY_SPEC_CTRL
:
4717 case M88E1000_EXT_PHY_SPEC_CTRL
:
4718 if (e1000_phy_reset(hw
))
4723 switch (data
->reg_num
) {
4725 if (mii_reg
& MII_CR_POWER_DOWN
)
4727 if (netif_running(adapter
->netdev
))
4728 e1000_reinit_locked(adapter
);
4730 e1000_reset(adapter
);
4738 return E1000_SUCCESS
;
4741 void e1000_pci_set_mwi(struct e1000_hw
*hw
)
4743 struct e1000_adapter
*adapter
= hw
->back
;
4744 int ret_val
= pci_set_mwi(adapter
->pdev
);
4747 e_err(probe
, "Error in setting MWI\n");
4750 void e1000_pci_clear_mwi(struct e1000_hw
*hw
)
4752 struct e1000_adapter
*adapter
= hw
->back
;
4754 pci_clear_mwi(adapter
->pdev
);
4757 int e1000_pcix_get_mmrbc(struct e1000_hw
*hw
)
4759 struct e1000_adapter
*adapter
= hw
->back
;
4760 return pcix_get_mmrbc(adapter
->pdev
);
4763 void e1000_pcix_set_mmrbc(struct e1000_hw
*hw
, int mmrbc
)
4765 struct e1000_adapter
*adapter
= hw
->back
;
4766 pcix_set_mmrbc(adapter
->pdev
, mmrbc
);
4769 void e1000_io_write(struct e1000_hw
*hw
, unsigned long port
, u32 value
)
4774 static bool e1000_vlan_used(struct e1000_adapter
*adapter
)
4778 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4783 static void __e1000_vlan_mode(struct e1000_adapter
*adapter
,
4784 netdev_features_t features
)
4786 struct e1000_hw
*hw
= &adapter
->hw
;
4790 if (features
& NETIF_F_HW_VLAN_RX
) {
4791 /* enable VLAN tag insert/strip */
4792 ctrl
|= E1000_CTRL_VME
;
4794 /* disable VLAN tag insert/strip */
4795 ctrl
&= ~E1000_CTRL_VME
;
4799 static void e1000_vlan_filter_on_off(struct e1000_adapter
*adapter
,
4802 struct e1000_hw
*hw
= &adapter
->hw
;
4805 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4806 e1000_irq_disable(adapter
);
4808 __e1000_vlan_mode(adapter
, adapter
->netdev
->features
);
4810 /* enable VLAN receive filtering */
4812 rctl
&= ~E1000_RCTL_CFIEN
;
4813 if (!(adapter
->netdev
->flags
& IFF_PROMISC
))
4814 rctl
|= E1000_RCTL_VFE
;
4816 e1000_update_mng_vlan(adapter
);
4818 /* disable VLAN receive filtering */
4820 rctl
&= ~E1000_RCTL_VFE
;
4824 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4825 e1000_irq_enable(adapter
);
4828 static void e1000_vlan_mode(struct net_device
*netdev
,
4829 netdev_features_t features
)
4831 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4833 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4834 e1000_irq_disable(adapter
);
4836 __e1000_vlan_mode(adapter
, features
);
4838 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4839 e1000_irq_enable(adapter
);
4842 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4844 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4845 struct e1000_hw
*hw
= &adapter
->hw
;
4848 if ((hw
->mng_cookie
.status
&
4849 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
4850 (vid
== adapter
->mng_vlan_id
))
4853 if (!e1000_vlan_used(adapter
))
4854 e1000_vlan_filter_on_off(adapter
, true);
4856 /* add VID to filter table */
4857 index
= (vid
>> 5) & 0x7F;
4858 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4859 vfta
|= (1 << (vid
& 0x1F));
4860 e1000_write_vfta(hw
, index
, vfta
);
4862 set_bit(vid
, adapter
->active_vlans
);
4867 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4869 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4870 struct e1000_hw
*hw
= &adapter
->hw
;
4873 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4874 e1000_irq_disable(adapter
);
4875 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4876 e1000_irq_enable(adapter
);
4878 /* remove VID from filter table */
4879 index
= (vid
>> 5) & 0x7F;
4880 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4881 vfta
&= ~(1 << (vid
& 0x1F));
4882 e1000_write_vfta(hw
, index
, vfta
);
4884 clear_bit(vid
, adapter
->active_vlans
);
4886 if (!e1000_vlan_used(adapter
))
4887 e1000_vlan_filter_on_off(adapter
, false);
4892 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
4896 if (!e1000_vlan_used(adapter
))
4899 e1000_vlan_filter_on_off(adapter
, true);
4900 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4901 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
4904 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u32 spd
, u8 dplx
)
4906 struct e1000_hw
*hw
= &adapter
->hw
;
4910 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4911 * for the switch() below to work */
4912 if ((spd
& 1) || (dplx
& ~1))
4915 /* Fiber NICs only allow 1000 gbps Full duplex */
4916 if ((hw
->media_type
== e1000_media_type_fiber
) &&
4917 spd
!= SPEED_1000
&&
4918 dplx
!= DUPLEX_FULL
)
4921 switch (spd
+ dplx
) {
4922 case SPEED_10
+ DUPLEX_HALF
:
4923 hw
->forced_speed_duplex
= e1000_10_half
;
4925 case SPEED_10
+ DUPLEX_FULL
:
4926 hw
->forced_speed_duplex
= e1000_10_full
;
4928 case SPEED_100
+ DUPLEX_HALF
:
4929 hw
->forced_speed_duplex
= e1000_100_half
;
4931 case SPEED_100
+ DUPLEX_FULL
:
4932 hw
->forced_speed_duplex
= e1000_100_full
;
4934 case SPEED_1000
+ DUPLEX_FULL
:
4936 hw
->autoneg_advertised
= ADVERTISE_1000_FULL
;
4938 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4945 e_err(probe
, "Unsupported Speed/Duplex configuration\n");
4949 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4951 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4952 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4953 struct e1000_hw
*hw
= &adapter
->hw
;
4954 u32 ctrl
, ctrl_ext
, rctl
, status
;
4955 u32 wufc
= adapter
->wol
;
4960 netif_device_detach(netdev
);
4962 if (netif_running(netdev
)) {
4963 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
4964 e1000_down(adapter
);
4968 retval
= pci_save_state(pdev
);
4973 status
= er32(STATUS
);
4974 if (status
& E1000_STATUS_LU
)
4975 wufc
&= ~E1000_WUFC_LNKC
;
4978 e1000_setup_rctl(adapter
);
4979 e1000_set_rx_mode(netdev
);
4983 /* turn on all-multi mode if wake on multicast is enabled */
4984 if (wufc
& E1000_WUFC_MC
)
4985 rctl
|= E1000_RCTL_MPE
;
4987 /* enable receives in the hardware */
4988 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
4990 if (hw
->mac_type
>= e1000_82540
) {
4992 /* advertise wake from D3Cold */
4993 #define E1000_CTRL_ADVD3WUC 0x00100000
4994 /* phy power management enable */
4995 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4996 ctrl
|= E1000_CTRL_ADVD3WUC
|
4997 E1000_CTRL_EN_PHY_PWR_MGMT
;
5001 if (hw
->media_type
== e1000_media_type_fiber
||
5002 hw
->media_type
== e1000_media_type_internal_serdes
) {
5003 /* keep the laser running in D3 */
5004 ctrl_ext
= er32(CTRL_EXT
);
5005 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
5006 ew32(CTRL_EXT
, ctrl_ext
);
5009 ew32(WUC
, E1000_WUC_PME_EN
);
5016 e1000_release_manageability(adapter
);
5018 *enable_wake
= !!wufc
;
5020 /* make sure adapter isn't asleep if manageability is enabled */
5021 if (adapter
->en_mng_pt
)
5022 *enable_wake
= true;
5024 if (netif_running(netdev
))
5025 e1000_free_irq(adapter
);
5027 pci_disable_device(pdev
);
5033 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5038 retval
= __e1000_shutdown(pdev
, &wake
);
5043 pci_prepare_to_sleep(pdev
);
5045 pci_wake_from_d3(pdev
, false);
5046 pci_set_power_state(pdev
, PCI_D3hot
);
5052 static int e1000_resume(struct pci_dev
*pdev
)
5054 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5055 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5056 struct e1000_hw
*hw
= &adapter
->hw
;
5059 pci_set_power_state(pdev
, PCI_D0
);
5060 pci_restore_state(pdev
);
5061 pci_save_state(pdev
);
5063 if (adapter
->need_ioport
)
5064 err
= pci_enable_device(pdev
);
5066 err
= pci_enable_device_mem(pdev
);
5068 pr_err("Cannot enable PCI device from suspend\n");
5071 pci_set_master(pdev
);
5073 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5074 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5076 if (netif_running(netdev
)) {
5077 err
= e1000_request_irq(adapter
);
5082 e1000_power_up_phy(adapter
);
5083 e1000_reset(adapter
);
5086 e1000_init_manageability(adapter
);
5088 if (netif_running(netdev
))
5091 netif_device_attach(netdev
);
5097 static void e1000_shutdown(struct pci_dev
*pdev
)
5101 __e1000_shutdown(pdev
, &wake
);
5103 if (system_state
== SYSTEM_POWER_OFF
) {
5104 pci_wake_from_d3(pdev
, wake
);
5105 pci_set_power_state(pdev
, PCI_D3hot
);
5109 #ifdef CONFIG_NET_POLL_CONTROLLER
5111 * Polling 'interrupt' - used by things like netconsole to send skbs
5112 * without having to re-enable interrupts. It's not called while
5113 * the interrupt routine is executing.
5115 static void e1000_netpoll(struct net_device
*netdev
)
5117 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5119 disable_irq(adapter
->pdev
->irq
);
5120 e1000_intr(adapter
->pdev
->irq
, netdev
);
5121 enable_irq(adapter
->pdev
->irq
);
5126 * e1000_io_error_detected - called when PCI error is detected
5127 * @pdev: Pointer to PCI device
5128 * @state: The current pci connection state
5130 * This function is called after a PCI bus error affecting
5131 * this device has been detected.
5133 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
5134 pci_channel_state_t state
)
5136 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5137 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5139 netif_device_detach(netdev
);
5141 if (state
== pci_channel_io_perm_failure
)
5142 return PCI_ERS_RESULT_DISCONNECT
;
5144 if (netif_running(netdev
))
5145 e1000_down(adapter
);
5146 pci_disable_device(pdev
);
5148 /* Request a slot slot reset. */
5149 return PCI_ERS_RESULT_NEED_RESET
;
5153 * e1000_io_slot_reset - called after the pci bus has been reset.
5154 * @pdev: Pointer to PCI device
5156 * Restart the card from scratch, as if from a cold-boot. Implementation
5157 * resembles the first-half of the e1000_resume routine.
5159 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
5161 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5162 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5163 struct e1000_hw
*hw
= &adapter
->hw
;
5166 if (adapter
->need_ioport
)
5167 err
= pci_enable_device(pdev
);
5169 err
= pci_enable_device_mem(pdev
);
5171 pr_err("Cannot re-enable PCI device after reset.\n");
5172 return PCI_ERS_RESULT_DISCONNECT
;
5174 pci_set_master(pdev
);
5176 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5177 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5179 e1000_reset(adapter
);
5182 return PCI_ERS_RESULT_RECOVERED
;
5186 * e1000_io_resume - called when traffic can start flowing again.
5187 * @pdev: Pointer to PCI device
5189 * This callback is called when the error recovery driver tells us that
5190 * its OK to resume normal operation. Implementation resembles the
5191 * second-half of the e1000_resume routine.
5193 static void e1000_io_resume(struct pci_dev
*pdev
)
5195 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5196 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5198 e1000_init_manageability(adapter
);
5200 if (netif_running(netdev
)) {
5201 if (e1000_up(adapter
)) {
5202 pr_info("can't bring device back up after reset\n");
5207 netif_device_attach(netdev
);