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
);
725 * Dump the eeprom for users having checksum issues
727 static void e1000_dump_eeprom(struct e1000_adapter
*adapter
)
729 struct net_device
*netdev
= adapter
->netdev
;
730 struct ethtool_eeprom eeprom
;
731 const struct ethtool_ops
*ops
= netdev
->ethtool_ops
;
734 u16 csum_old
, csum_new
= 0;
736 eeprom
.len
= ops
->get_eeprom_len(netdev
);
739 data
= kmalloc(eeprom
.len
, GFP_KERNEL
);
743 ops
->get_eeprom(netdev
, &eeprom
, data
);
745 csum_old
= (data
[EEPROM_CHECKSUM_REG
* 2]) +
746 (data
[EEPROM_CHECKSUM_REG
* 2 + 1] << 8);
747 for (i
= 0; i
< EEPROM_CHECKSUM_REG
* 2; i
+= 2)
748 csum_new
+= data
[i
] + (data
[i
+ 1] << 8);
749 csum_new
= EEPROM_SUM
- csum_new
;
751 pr_err("/*********************/\n");
752 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old
);
753 pr_err("Calculated : 0x%04x\n", csum_new
);
755 pr_err("Offset Values\n");
756 pr_err("======== ======\n");
757 print_hex_dump(KERN_ERR
, "", DUMP_PREFIX_OFFSET
, 16, 1, data
, 128, 0);
759 pr_err("Include this output when contacting your support provider.\n");
760 pr_err("This is not a software error! Something bad happened to\n");
761 pr_err("your hardware or EEPROM image. Ignoring this problem could\n");
762 pr_err("result in further problems, possibly loss of data,\n");
763 pr_err("corruption or system hangs!\n");
764 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n");
765 pr_err("which is invalid and requires you to set the proper MAC\n");
766 pr_err("address manually before continuing to enable this network\n");
767 pr_err("device. Please inspect the EEPROM dump and report the\n");
768 pr_err("issue to your hardware vendor or Intel Customer Support.\n");
769 pr_err("/*********************/\n");
775 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
776 * @pdev: PCI device information struct
778 * Return true if an adapter needs ioport resources
780 static int e1000_is_need_ioport(struct pci_dev
*pdev
)
782 switch (pdev
->device
) {
783 case E1000_DEV_ID_82540EM
:
784 case E1000_DEV_ID_82540EM_LOM
:
785 case E1000_DEV_ID_82540EP
:
786 case E1000_DEV_ID_82540EP_LOM
:
787 case E1000_DEV_ID_82540EP_LP
:
788 case E1000_DEV_ID_82541EI
:
789 case E1000_DEV_ID_82541EI_MOBILE
:
790 case E1000_DEV_ID_82541ER
:
791 case E1000_DEV_ID_82541ER_LOM
:
792 case E1000_DEV_ID_82541GI
:
793 case E1000_DEV_ID_82541GI_LF
:
794 case E1000_DEV_ID_82541GI_MOBILE
:
795 case E1000_DEV_ID_82544EI_COPPER
:
796 case E1000_DEV_ID_82544EI_FIBER
:
797 case E1000_DEV_ID_82544GC_COPPER
:
798 case E1000_DEV_ID_82544GC_LOM
:
799 case E1000_DEV_ID_82545EM_COPPER
:
800 case E1000_DEV_ID_82545EM_FIBER
:
801 case E1000_DEV_ID_82546EB_COPPER
:
802 case E1000_DEV_ID_82546EB_FIBER
:
803 case E1000_DEV_ID_82546EB_QUAD_COPPER
:
810 static netdev_features_t
e1000_fix_features(struct net_device
*netdev
,
811 netdev_features_t features
)
814 * Since there is no support for separate rx/tx vlan accel
815 * enable/disable make sure tx flag is always in same state as rx.
817 if (features
& NETIF_F_HW_VLAN_RX
)
818 features
|= NETIF_F_HW_VLAN_TX
;
820 features
&= ~NETIF_F_HW_VLAN_TX
;
825 static int e1000_set_features(struct net_device
*netdev
,
826 netdev_features_t features
)
828 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
829 netdev_features_t changed
= features
^ netdev
->features
;
831 if (changed
& NETIF_F_HW_VLAN_RX
)
832 e1000_vlan_mode(netdev
, features
);
834 if (!(changed
& (NETIF_F_RXCSUM
| NETIF_F_RXALL
)))
837 netdev
->features
= features
;
838 adapter
->rx_csum
= !!(features
& NETIF_F_RXCSUM
);
840 if (netif_running(netdev
))
841 e1000_reinit_locked(adapter
);
843 e1000_reset(adapter
);
848 static const struct net_device_ops e1000_netdev_ops
= {
849 .ndo_open
= e1000_open
,
850 .ndo_stop
= e1000_close
,
851 .ndo_start_xmit
= e1000_xmit_frame
,
852 .ndo_get_stats
= e1000_get_stats
,
853 .ndo_set_rx_mode
= e1000_set_rx_mode
,
854 .ndo_set_mac_address
= e1000_set_mac
,
855 .ndo_tx_timeout
= e1000_tx_timeout
,
856 .ndo_change_mtu
= e1000_change_mtu
,
857 .ndo_do_ioctl
= e1000_ioctl
,
858 .ndo_validate_addr
= eth_validate_addr
,
859 .ndo_vlan_rx_add_vid
= e1000_vlan_rx_add_vid
,
860 .ndo_vlan_rx_kill_vid
= e1000_vlan_rx_kill_vid
,
861 #ifdef CONFIG_NET_POLL_CONTROLLER
862 .ndo_poll_controller
= e1000_netpoll
,
864 .ndo_fix_features
= e1000_fix_features
,
865 .ndo_set_features
= e1000_set_features
,
869 * e1000_init_hw_struct - initialize members of hw struct
870 * @adapter: board private struct
871 * @hw: structure used by e1000_hw.c
873 * Factors out initialization of the e1000_hw struct to its own function
874 * that can be called very early at init (just after struct allocation).
875 * Fields are initialized based on PCI device information and
876 * OS network device settings (MTU size).
877 * Returns negative error codes if MAC type setup fails.
879 static int e1000_init_hw_struct(struct e1000_adapter
*adapter
,
882 struct pci_dev
*pdev
= adapter
->pdev
;
884 /* PCI config space info */
885 hw
->vendor_id
= pdev
->vendor
;
886 hw
->device_id
= pdev
->device
;
887 hw
->subsystem_vendor_id
= pdev
->subsystem_vendor
;
888 hw
->subsystem_id
= pdev
->subsystem_device
;
889 hw
->revision_id
= pdev
->revision
;
891 pci_read_config_word(pdev
, PCI_COMMAND
, &hw
->pci_cmd_word
);
893 hw
->max_frame_size
= adapter
->netdev
->mtu
+
894 ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
895 hw
->min_frame_size
= MINIMUM_ETHERNET_FRAME_SIZE
;
897 /* identify the MAC */
898 if (e1000_set_mac_type(hw
)) {
899 e_err(probe
, "Unknown MAC Type\n");
903 switch (hw
->mac_type
) {
908 case e1000_82541_rev_2
:
909 case e1000_82547_rev_2
:
910 hw
->phy_init_script
= 1;
914 e1000_set_media_type(hw
);
915 e1000_get_bus_info(hw
);
917 hw
->wait_autoneg_complete
= false;
918 hw
->tbi_compatibility_en
= true;
919 hw
->adaptive_ifs
= true;
923 if (hw
->media_type
== e1000_media_type_copper
) {
924 hw
->mdix
= AUTO_ALL_MODES
;
925 hw
->disable_polarity_correction
= false;
926 hw
->master_slave
= E1000_MASTER_SLAVE
;
933 * e1000_probe - Device Initialization Routine
934 * @pdev: PCI device information struct
935 * @ent: entry in e1000_pci_tbl
937 * Returns 0 on success, negative on failure
939 * e1000_probe initializes an adapter identified by a pci_dev structure.
940 * The OS initialization, configuring of the adapter private structure,
941 * and a hardware reset occur.
943 static int __devinit
e1000_probe(struct pci_dev
*pdev
,
944 const struct pci_device_id
*ent
)
946 struct net_device
*netdev
;
947 struct e1000_adapter
*adapter
;
950 static int cards_found
= 0;
951 static int global_quad_port_a
= 0; /* global ksp3 port a indication */
952 int i
, err
, pci_using_dac
;
955 u16 eeprom_apme_mask
= E1000_EEPROM_APME
;
956 int bars
, need_ioport
;
958 /* do not allocate ioport bars when not needed */
959 need_ioport
= e1000_is_need_ioport(pdev
);
961 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
| IORESOURCE_IO
);
962 err
= pci_enable_device(pdev
);
964 bars
= pci_select_bars(pdev
, IORESOURCE_MEM
);
965 err
= pci_enable_device_mem(pdev
);
970 err
= pci_request_selected_regions(pdev
, bars
, e1000_driver_name
);
974 pci_set_master(pdev
);
975 err
= pci_save_state(pdev
);
977 goto err_alloc_etherdev
;
980 netdev
= alloc_etherdev(sizeof(struct e1000_adapter
));
982 goto err_alloc_etherdev
;
984 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
986 pci_set_drvdata(pdev
, netdev
);
987 adapter
= netdev_priv(netdev
);
988 adapter
->netdev
= netdev
;
989 adapter
->pdev
= pdev
;
990 adapter
->msg_enable
= netif_msg_init(debug
, DEFAULT_MSG_ENABLE
);
991 adapter
->bars
= bars
;
992 adapter
->need_ioport
= need_ioport
;
998 hw
->hw_addr
= pci_ioremap_bar(pdev
, BAR_0
);
1002 if (adapter
->need_ioport
) {
1003 for (i
= BAR_1
; i
<= BAR_5
; i
++) {
1004 if (pci_resource_len(pdev
, i
) == 0)
1006 if (pci_resource_flags(pdev
, i
) & IORESOURCE_IO
) {
1007 hw
->io_base
= pci_resource_start(pdev
, i
);
1013 /* make ready for any if (hw->...) below */
1014 err
= e1000_init_hw_struct(adapter
, hw
);
1019 * there is a workaround being applied below that limits
1020 * 64-bit DMA addresses to 64-bit hardware. There are some
1021 * 32-bit adapters that Tx hang when given 64-bit DMA addresses
1024 if ((hw
->bus_type
== e1000_bus_type_pcix
) &&
1025 !dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(64))) {
1027 * according to DMA-API-HOWTO, coherent calls will always
1028 * succeed if the set call did
1030 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(64));
1033 err
= dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1035 pr_err("No usable DMA config, aborting\n");
1038 dma_set_coherent_mask(&pdev
->dev
, DMA_BIT_MASK(32));
1041 netdev
->netdev_ops
= &e1000_netdev_ops
;
1042 e1000_set_ethtool_ops(netdev
);
1043 netdev
->watchdog_timeo
= 5 * HZ
;
1044 netif_napi_add(netdev
, &adapter
->napi
, e1000_clean
, 64);
1046 strncpy(netdev
->name
, pci_name(pdev
), sizeof(netdev
->name
) - 1);
1048 adapter
->bd_number
= cards_found
;
1050 /* setup the private structure */
1052 err
= e1000_sw_init(adapter
);
1057 if (hw
->mac_type
== e1000_ce4100
) {
1058 hw
->ce4100_gbe_mdio_base_virt
=
1059 ioremap(pci_resource_start(pdev
, BAR_1
),
1060 pci_resource_len(pdev
, BAR_1
));
1062 if (!hw
->ce4100_gbe_mdio_base_virt
)
1063 goto err_mdio_ioremap
;
1066 if (hw
->mac_type
>= e1000_82543
) {
1067 netdev
->hw_features
= NETIF_F_SG
|
1070 netdev
->features
= NETIF_F_HW_VLAN_TX
|
1071 NETIF_F_HW_VLAN_FILTER
;
1074 if ((hw
->mac_type
>= e1000_82544
) &&
1075 (hw
->mac_type
!= e1000_82547
))
1076 netdev
->hw_features
|= NETIF_F_TSO
;
1078 netdev
->priv_flags
|= IFF_SUPP_NOFCS
;
1080 netdev
->features
|= netdev
->hw_features
;
1081 netdev
->hw_features
|= NETIF_F_RXCSUM
;
1082 netdev
->hw_features
|= NETIF_F_RXALL
;
1083 netdev
->hw_features
|= NETIF_F_RXFCS
;
1085 if (pci_using_dac
) {
1086 netdev
->features
|= NETIF_F_HIGHDMA
;
1087 netdev
->vlan_features
|= NETIF_F_HIGHDMA
;
1090 netdev
->vlan_features
|= NETIF_F_TSO
;
1091 netdev
->vlan_features
|= NETIF_F_HW_CSUM
;
1092 netdev
->vlan_features
|= NETIF_F_SG
;
1094 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
1096 adapter
->en_mng_pt
= e1000_enable_mng_pass_thru(hw
);
1098 /* initialize eeprom parameters */
1099 if (e1000_init_eeprom_params(hw
)) {
1100 e_err(probe
, "EEPROM initialization failed\n");
1104 /* before reading the EEPROM, reset the controller to
1105 * put the device in a known good starting state */
1109 /* make sure the EEPROM is good */
1110 if (e1000_validate_eeprom_checksum(hw
) < 0) {
1111 e_err(probe
, "The EEPROM Checksum Is Not Valid\n");
1112 e1000_dump_eeprom(adapter
);
1114 * set MAC address to all zeroes to invalidate and temporary
1115 * disable this device for the user. This blocks regular
1116 * traffic while still permitting ethtool ioctls from reaching
1117 * the hardware as well as allowing the user to run the
1118 * interface after manually setting a hw addr using
1121 memset(hw
->mac_addr
, 0, netdev
->addr_len
);
1123 /* copy the MAC address out of the EEPROM */
1124 if (e1000_read_mac_addr(hw
))
1125 e_err(probe
, "EEPROM Read Error\n");
1127 /* don't block initalization here due to bad MAC address */
1128 memcpy(netdev
->dev_addr
, hw
->mac_addr
, netdev
->addr_len
);
1129 memcpy(netdev
->perm_addr
, hw
->mac_addr
, netdev
->addr_len
);
1131 if (!is_valid_ether_addr(netdev
->perm_addr
))
1132 e_err(probe
, "Invalid MAC Address\n");
1135 INIT_DELAYED_WORK(&adapter
->watchdog_task
, e1000_watchdog
);
1136 INIT_DELAYED_WORK(&adapter
->fifo_stall_task
,
1137 e1000_82547_tx_fifo_stall_task
);
1138 INIT_DELAYED_WORK(&adapter
->phy_info_task
, e1000_update_phy_info_task
);
1139 INIT_WORK(&adapter
->reset_task
, e1000_reset_task
);
1141 e1000_check_options(adapter
);
1143 /* Initial Wake on LAN setting
1144 * If APM wake is enabled in the EEPROM,
1145 * enable the ACPI Magic Packet filter
1148 switch (hw
->mac_type
) {
1149 case e1000_82542_rev2_0
:
1150 case e1000_82542_rev2_1
:
1154 e1000_read_eeprom(hw
,
1155 EEPROM_INIT_CONTROL2_REG
, 1, &eeprom_data
);
1156 eeprom_apme_mask
= E1000_EEPROM_82544_APM
;
1159 case e1000_82546_rev_3
:
1160 if (er32(STATUS
) & E1000_STATUS_FUNC_1
){
1161 e1000_read_eeprom(hw
,
1162 EEPROM_INIT_CONTROL3_PORT_B
, 1, &eeprom_data
);
1167 e1000_read_eeprom(hw
,
1168 EEPROM_INIT_CONTROL3_PORT_A
, 1, &eeprom_data
);
1171 if (eeprom_data
& eeprom_apme_mask
)
1172 adapter
->eeprom_wol
|= E1000_WUFC_MAG
;
1174 /* now that we have the eeprom settings, apply the special cases
1175 * where the eeprom may be wrong or the board simply won't support
1176 * wake on lan on a particular port */
1177 switch (pdev
->device
) {
1178 case E1000_DEV_ID_82546GB_PCIE
:
1179 adapter
->eeprom_wol
= 0;
1181 case E1000_DEV_ID_82546EB_FIBER
:
1182 case E1000_DEV_ID_82546GB_FIBER
:
1183 /* Wake events only supported on port A for dual fiber
1184 * regardless of eeprom setting */
1185 if (er32(STATUS
) & E1000_STATUS_FUNC_1
)
1186 adapter
->eeprom_wol
= 0;
1188 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3
:
1189 /* if quad port adapter, disable WoL on all but port A */
1190 if (global_quad_port_a
!= 0)
1191 adapter
->eeprom_wol
= 0;
1193 adapter
->quad_port_a
= true;
1194 /* Reset for multiple quad port adapters */
1195 if (++global_quad_port_a
== 4)
1196 global_quad_port_a
= 0;
1200 /* initialize the wol settings based on the eeprom settings */
1201 adapter
->wol
= adapter
->eeprom_wol
;
1202 device_set_wakeup_enable(&adapter
->pdev
->dev
, adapter
->wol
);
1204 /* Auto detect PHY address */
1205 if (hw
->mac_type
== e1000_ce4100
) {
1206 for (i
= 0; i
< 32; i
++) {
1208 e1000_read_phy_reg(hw
, PHY_ID2
, &tmp
);
1209 if (tmp
== 0 || tmp
== 0xFF) {
1218 /* reset the hardware with the new settings */
1219 e1000_reset(adapter
);
1221 strcpy(netdev
->name
, "eth%d");
1222 err
= register_netdev(netdev
);
1226 e1000_vlan_filter_on_off(adapter
, false);
1228 /* print bus type/speed/width info */
1229 e_info(probe
, "(PCI%s:%dMHz:%d-bit) %pM\n",
1230 ((hw
->bus_type
== e1000_bus_type_pcix
) ? "-X" : ""),
1231 ((hw
->bus_speed
== e1000_bus_speed_133
) ? 133 :
1232 (hw
->bus_speed
== e1000_bus_speed_120
) ? 120 :
1233 (hw
->bus_speed
== e1000_bus_speed_100
) ? 100 :
1234 (hw
->bus_speed
== e1000_bus_speed_66
) ? 66 : 33),
1235 ((hw
->bus_width
== e1000_bus_width_64
) ? 64 : 32),
1238 /* carrier off reporting is important to ethtool even BEFORE open */
1239 netif_carrier_off(netdev
);
1241 e_info(probe
, "Intel(R) PRO/1000 Network Connection\n");
1248 e1000_phy_hw_reset(hw
);
1250 if (hw
->flash_address
)
1251 iounmap(hw
->flash_address
);
1252 kfree(adapter
->tx_ring
);
1253 kfree(adapter
->rx_ring
);
1257 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1258 iounmap(hw
->hw_addr
);
1260 free_netdev(netdev
);
1262 pci_release_selected_regions(pdev
, bars
);
1264 pci_disable_device(pdev
);
1269 * e1000_remove - Device Removal Routine
1270 * @pdev: PCI device information struct
1272 * e1000_remove is called by the PCI subsystem to alert the driver
1273 * that it should release a PCI device. The could be caused by a
1274 * Hot-Plug event, or because the driver is going to be removed from
1278 static void __devexit
e1000_remove(struct pci_dev
*pdev
)
1280 struct net_device
*netdev
= pci_get_drvdata(pdev
);
1281 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1282 struct e1000_hw
*hw
= &adapter
->hw
;
1284 e1000_down_and_stop(adapter
);
1285 e1000_release_manageability(adapter
);
1287 unregister_netdev(netdev
);
1289 e1000_phy_hw_reset(hw
);
1291 kfree(adapter
->tx_ring
);
1292 kfree(adapter
->rx_ring
);
1294 if (hw
->mac_type
== e1000_ce4100
)
1295 iounmap(hw
->ce4100_gbe_mdio_base_virt
);
1296 iounmap(hw
->hw_addr
);
1297 if (hw
->flash_address
)
1298 iounmap(hw
->flash_address
);
1299 pci_release_selected_regions(pdev
, adapter
->bars
);
1301 free_netdev(netdev
);
1303 pci_disable_device(pdev
);
1307 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
1308 * @adapter: board private structure to initialize
1310 * e1000_sw_init initializes the Adapter private data structure.
1311 * e1000_init_hw_struct MUST be called before this function
1314 static int __devinit
e1000_sw_init(struct e1000_adapter
*adapter
)
1316 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
1318 adapter
->num_tx_queues
= 1;
1319 adapter
->num_rx_queues
= 1;
1321 if (e1000_alloc_queues(adapter
)) {
1322 e_err(probe
, "Unable to allocate memory for queues\n");
1326 /* Explicitly disable IRQ since the NIC can be in any state. */
1327 e1000_irq_disable(adapter
);
1329 spin_lock_init(&adapter
->stats_lock
);
1330 mutex_init(&adapter
->mutex
);
1332 set_bit(__E1000_DOWN
, &adapter
->flags
);
1338 * e1000_alloc_queues - Allocate memory for all rings
1339 * @adapter: board private structure to initialize
1341 * We allocate one ring per queue at run-time since we don't know the
1342 * number of queues at compile-time.
1345 static int __devinit
e1000_alloc_queues(struct e1000_adapter
*adapter
)
1347 adapter
->tx_ring
= kcalloc(adapter
->num_tx_queues
,
1348 sizeof(struct e1000_tx_ring
), GFP_KERNEL
);
1349 if (!adapter
->tx_ring
)
1352 adapter
->rx_ring
= kcalloc(adapter
->num_rx_queues
,
1353 sizeof(struct e1000_rx_ring
), GFP_KERNEL
);
1354 if (!adapter
->rx_ring
) {
1355 kfree(adapter
->tx_ring
);
1359 return E1000_SUCCESS
;
1363 * e1000_open - Called when a network interface is made active
1364 * @netdev: network interface device structure
1366 * Returns 0 on success, negative value on failure
1368 * The open entry point is called when a network interface is made
1369 * active by the system (IFF_UP). At this point all resources needed
1370 * for transmit and receive operations are allocated, the interrupt
1371 * handler is registered with the OS, the watchdog task is started,
1372 * and the stack is notified that the interface is ready.
1375 static int e1000_open(struct net_device
*netdev
)
1377 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1378 struct e1000_hw
*hw
= &adapter
->hw
;
1381 /* disallow open during test */
1382 if (test_bit(__E1000_TESTING
, &adapter
->flags
))
1385 netif_carrier_off(netdev
);
1387 /* allocate transmit descriptors */
1388 err
= e1000_setup_all_tx_resources(adapter
);
1392 /* allocate receive descriptors */
1393 err
= e1000_setup_all_rx_resources(adapter
);
1397 e1000_power_up_phy(adapter
);
1399 adapter
->mng_vlan_id
= E1000_MNG_VLAN_NONE
;
1400 if ((hw
->mng_cookie
.status
&
1401 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
)) {
1402 e1000_update_mng_vlan(adapter
);
1405 /* before we allocate an interrupt, we must be ready to handle it.
1406 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1407 * as soon as we call pci_request_irq, so we have to setup our
1408 * clean_rx handler before we do so. */
1409 e1000_configure(adapter
);
1411 err
= e1000_request_irq(adapter
);
1415 /* From here on the code is the same as e1000_up() */
1416 clear_bit(__E1000_DOWN
, &adapter
->flags
);
1418 napi_enable(&adapter
->napi
);
1420 e1000_irq_enable(adapter
);
1422 netif_start_queue(netdev
);
1424 /* fire a link status change interrupt to start the watchdog */
1425 ew32(ICS
, E1000_ICS_LSC
);
1427 return E1000_SUCCESS
;
1430 e1000_power_down_phy(adapter
);
1431 e1000_free_all_rx_resources(adapter
);
1433 e1000_free_all_tx_resources(adapter
);
1435 e1000_reset(adapter
);
1441 * e1000_close - Disables a network interface
1442 * @netdev: network interface device structure
1444 * Returns 0, this is not allowed to fail
1446 * The close entry point is called when an interface is de-activated
1447 * by the OS. The hardware is still under the drivers control, but
1448 * needs to be disabled. A global MAC reset is issued to stop the
1449 * hardware, and all transmit and receive resources are freed.
1452 static int e1000_close(struct net_device
*netdev
)
1454 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
1455 struct e1000_hw
*hw
= &adapter
->hw
;
1457 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
1458 e1000_down(adapter
);
1459 e1000_power_down_phy(adapter
);
1460 e1000_free_irq(adapter
);
1462 e1000_free_all_tx_resources(adapter
);
1463 e1000_free_all_rx_resources(adapter
);
1465 /* kill manageability vlan ID if supported, but not if a vlan with
1466 * the same ID is registered on the host OS (let 8021q kill it) */
1467 if ((hw
->mng_cookie
.status
&
1468 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
1469 !test_bit(adapter
->mng_vlan_id
, adapter
->active_vlans
)) {
1470 e1000_vlan_rx_kill_vid(netdev
, adapter
->mng_vlan_id
);
1477 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
1478 * @adapter: address of board private structure
1479 * @start: address of beginning of memory
1480 * @len: length of memory
1482 static bool e1000_check_64k_bound(struct e1000_adapter
*adapter
, void *start
,
1485 struct e1000_hw
*hw
= &adapter
->hw
;
1486 unsigned long begin
= (unsigned long)start
;
1487 unsigned long end
= begin
+ len
;
1489 /* First rev 82545 and 82546 need to not allow any memory
1490 * write location to cross 64k boundary due to errata 23 */
1491 if (hw
->mac_type
== e1000_82545
||
1492 hw
->mac_type
== e1000_ce4100
||
1493 hw
->mac_type
== e1000_82546
) {
1494 return ((begin
^ (end
- 1)) >> 16) != 0 ? false : true;
1501 * e1000_setup_tx_resources - allocate Tx resources (Descriptors)
1502 * @adapter: board private structure
1503 * @txdr: tx descriptor ring (for a specific queue) to setup
1505 * Return 0 on success, negative on failure
1508 static int e1000_setup_tx_resources(struct e1000_adapter
*adapter
,
1509 struct e1000_tx_ring
*txdr
)
1511 struct pci_dev
*pdev
= adapter
->pdev
;
1514 size
= sizeof(struct e1000_buffer
) * txdr
->count
;
1515 txdr
->buffer_info
= vzalloc(size
);
1516 if (!txdr
->buffer_info
) {
1517 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1522 /* round up to nearest 4K */
1524 txdr
->size
= txdr
->count
* sizeof(struct e1000_tx_desc
);
1525 txdr
->size
= ALIGN(txdr
->size
, 4096);
1527 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
, &txdr
->dma
,
1531 vfree(txdr
->buffer_info
);
1532 e_err(probe
, "Unable to allocate memory for the Tx descriptor "
1537 /* Fix for errata 23, can't cross 64kB boundary */
1538 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1539 void *olddesc
= txdr
->desc
;
1540 dma_addr_t olddma
= txdr
->dma
;
1541 e_err(tx_err
, "txdr align check failed: %u bytes at %p\n",
1542 txdr
->size
, txdr
->desc
);
1543 /* Try again, without freeing the previous */
1544 txdr
->desc
= dma_alloc_coherent(&pdev
->dev
, txdr
->size
,
1545 &txdr
->dma
, GFP_KERNEL
);
1546 /* Failed allocation, critical failure */
1548 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1550 goto setup_tx_desc_die
;
1553 if (!e1000_check_64k_bound(adapter
, txdr
->desc
, txdr
->size
)) {
1555 dma_free_coherent(&pdev
->dev
, txdr
->size
, txdr
->desc
,
1557 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1559 e_err(probe
, "Unable to allocate aligned memory "
1560 "for the transmit descriptor ring\n");
1561 vfree(txdr
->buffer_info
);
1564 /* Free old allocation, new allocation was successful */
1565 dma_free_coherent(&pdev
->dev
, txdr
->size
, olddesc
,
1569 memset(txdr
->desc
, 0, txdr
->size
);
1571 txdr
->next_to_use
= 0;
1572 txdr
->next_to_clean
= 0;
1578 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources
1579 * (Descriptors) for all queues
1580 * @adapter: board private structure
1582 * Return 0 on success, negative on failure
1585 int e1000_setup_all_tx_resources(struct e1000_adapter
*adapter
)
1589 for (i
= 0; i
< adapter
->num_tx_queues
; i
++) {
1590 err
= e1000_setup_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1592 e_err(probe
, "Allocation for Tx Queue %u failed\n", i
);
1593 for (i
-- ; i
>= 0; i
--)
1594 e1000_free_tx_resources(adapter
,
1595 &adapter
->tx_ring
[i
]);
1604 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1605 * @adapter: board private structure
1607 * Configure the Tx unit of the MAC after a reset.
1610 static void e1000_configure_tx(struct e1000_adapter
*adapter
)
1613 struct e1000_hw
*hw
= &adapter
->hw
;
1614 u32 tdlen
, tctl
, tipg
;
1617 /* Setup the HW Tx Head and Tail descriptor pointers */
1619 switch (adapter
->num_tx_queues
) {
1622 tdba
= adapter
->tx_ring
[0].dma
;
1623 tdlen
= adapter
->tx_ring
[0].count
*
1624 sizeof(struct e1000_tx_desc
);
1626 ew32(TDBAH
, (tdba
>> 32));
1627 ew32(TDBAL
, (tdba
& 0x00000000ffffffffULL
));
1630 adapter
->tx_ring
[0].tdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDH
: E1000_82542_TDH
);
1631 adapter
->tx_ring
[0].tdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_TDT
: E1000_82542_TDT
);
1635 /* Set the default values for the Tx Inter Packet Gap timer */
1636 if ((hw
->media_type
== e1000_media_type_fiber
||
1637 hw
->media_type
== e1000_media_type_internal_serdes
))
1638 tipg
= DEFAULT_82543_TIPG_IPGT_FIBER
;
1640 tipg
= DEFAULT_82543_TIPG_IPGT_COPPER
;
1642 switch (hw
->mac_type
) {
1643 case e1000_82542_rev2_0
:
1644 case e1000_82542_rev2_1
:
1645 tipg
= DEFAULT_82542_TIPG_IPGT
;
1646 ipgr1
= DEFAULT_82542_TIPG_IPGR1
;
1647 ipgr2
= DEFAULT_82542_TIPG_IPGR2
;
1650 ipgr1
= DEFAULT_82543_TIPG_IPGR1
;
1651 ipgr2
= DEFAULT_82543_TIPG_IPGR2
;
1654 tipg
|= ipgr1
<< E1000_TIPG_IPGR1_SHIFT
;
1655 tipg
|= ipgr2
<< E1000_TIPG_IPGR2_SHIFT
;
1658 /* Set the Tx Interrupt Delay register */
1660 ew32(TIDV
, adapter
->tx_int_delay
);
1661 if (hw
->mac_type
>= e1000_82540
)
1662 ew32(TADV
, adapter
->tx_abs_int_delay
);
1664 /* Program the Transmit Control Register */
1667 tctl
&= ~E1000_TCTL_CT
;
1668 tctl
|= E1000_TCTL_PSP
| E1000_TCTL_RTLC
|
1669 (E1000_COLLISION_THRESHOLD
<< E1000_CT_SHIFT
);
1671 e1000_config_collision_dist(hw
);
1673 /* Setup Transmit Descriptor Settings for eop descriptor */
1674 adapter
->txd_cmd
= E1000_TXD_CMD_EOP
| E1000_TXD_CMD_IFCS
;
1676 /* only set IDE if we are delaying interrupts using the timers */
1677 if (adapter
->tx_int_delay
)
1678 adapter
->txd_cmd
|= E1000_TXD_CMD_IDE
;
1680 if (hw
->mac_type
< e1000_82543
)
1681 adapter
->txd_cmd
|= E1000_TXD_CMD_RPS
;
1683 adapter
->txd_cmd
|= E1000_TXD_CMD_RS
;
1685 /* Cache if we're 82544 running in PCI-X because we'll
1686 * need this to apply a workaround later in the send path. */
1687 if (hw
->mac_type
== e1000_82544
&&
1688 hw
->bus_type
== e1000_bus_type_pcix
)
1689 adapter
->pcix_82544
= true;
1696 * e1000_setup_rx_resources - allocate Rx resources (Descriptors)
1697 * @adapter: board private structure
1698 * @rxdr: rx descriptor ring (for a specific queue) to setup
1700 * Returns 0 on success, negative on failure
1703 static int e1000_setup_rx_resources(struct e1000_adapter
*adapter
,
1704 struct e1000_rx_ring
*rxdr
)
1706 struct pci_dev
*pdev
= adapter
->pdev
;
1709 size
= sizeof(struct e1000_buffer
) * rxdr
->count
;
1710 rxdr
->buffer_info
= vzalloc(size
);
1711 if (!rxdr
->buffer_info
) {
1712 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1717 desc_len
= sizeof(struct e1000_rx_desc
);
1719 /* Round up to nearest 4K */
1721 rxdr
->size
= rxdr
->count
* desc_len
;
1722 rxdr
->size
= ALIGN(rxdr
->size
, 4096);
1724 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
, &rxdr
->dma
,
1728 e_err(probe
, "Unable to allocate memory for the Rx descriptor "
1731 vfree(rxdr
->buffer_info
);
1735 /* Fix for errata 23, can't cross 64kB boundary */
1736 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1737 void *olddesc
= rxdr
->desc
;
1738 dma_addr_t olddma
= rxdr
->dma
;
1739 e_err(rx_err
, "rxdr align check failed: %u bytes at %p\n",
1740 rxdr
->size
, rxdr
->desc
);
1741 /* Try again, without freeing the previous */
1742 rxdr
->desc
= dma_alloc_coherent(&pdev
->dev
, rxdr
->size
,
1743 &rxdr
->dma
, GFP_KERNEL
);
1744 /* Failed allocation, critical failure */
1746 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1748 e_err(probe
, "Unable to allocate memory for the Rx "
1749 "descriptor ring\n");
1750 goto setup_rx_desc_die
;
1753 if (!e1000_check_64k_bound(adapter
, rxdr
->desc
, rxdr
->size
)) {
1755 dma_free_coherent(&pdev
->dev
, rxdr
->size
, rxdr
->desc
,
1757 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1759 e_err(probe
, "Unable to allocate aligned memory for "
1760 "the Rx descriptor ring\n");
1761 goto setup_rx_desc_die
;
1763 /* Free old allocation, new allocation was successful */
1764 dma_free_coherent(&pdev
->dev
, rxdr
->size
, olddesc
,
1768 memset(rxdr
->desc
, 0, rxdr
->size
);
1770 rxdr
->next_to_clean
= 0;
1771 rxdr
->next_to_use
= 0;
1772 rxdr
->rx_skb_top
= NULL
;
1778 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources
1779 * (Descriptors) for all queues
1780 * @adapter: board private structure
1782 * Return 0 on success, negative on failure
1785 int e1000_setup_all_rx_resources(struct e1000_adapter
*adapter
)
1789 for (i
= 0; i
< adapter
->num_rx_queues
; i
++) {
1790 err
= e1000_setup_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
1792 e_err(probe
, "Allocation for Rx Queue %u failed\n", i
);
1793 for (i
-- ; i
>= 0; i
--)
1794 e1000_free_rx_resources(adapter
,
1795 &adapter
->rx_ring
[i
]);
1804 * e1000_setup_rctl - configure the receive control registers
1805 * @adapter: Board private structure
1807 static void e1000_setup_rctl(struct e1000_adapter
*adapter
)
1809 struct e1000_hw
*hw
= &adapter
->hw
;
1814 rctl
&= ~(3 << E1000_RCTL_MO_SHIFT
);
1816 rctl
|= E1000_RCTL_BAM
| E1000_RCTL_LBM_NO
|
1817 E1000_RCTL_RDMTS_HALF
|
1818 (hw
->mc_filter_type
<< E1000_RCTL_MO_SHIFT
);
1820 if (hw
->tbi_compatibility_on
== 1)
1821 rctl
|= E1000_RCTL_SBP
;
1823 rctl
&= ~E1000_RCTL_SBP
;
1825 if (adapter
->netdev
->mtu
<= ETH_DATA_LEN
)
1826 rctl
&= ~E1000_RCTL_LPE
;
1828 rctl
|= E1000_RCTL_LPE
;
1830 /* Setup buffer sizes */
1831 rctl
&= ~E1000_RCTL_SZ_4096
;
1832 rctl
|= E1000_RCTL_BSEX
;
1833 switch (adapter
->rx_buffer_len
) {
1834 case E1000_RXBUFFER_2048
:
1836 rctl
|= E1000_RCTL_SZ_2048
;
1837 rctl
&= ~E1000_RCTL_BSEX
;
1839 case E1000_RXBUFFER_4096
:
1840 rctl
|= E1000_RCTL_SZ_4096
;
1842 case E1000_RXBUFFER_8192
:
1843 rctl
|= E1000_RCTL_SZ_8192
;
1845 case E1000_RXBUFFER_16384
:
1846 rctl
|= E1000_RCTL_SZ_16384
;
1850 /* This is useful for sniffing bad packets. */
1851 if (adapter
->netdev
->features
& NETIF_F_RXALL
) {
1852 /* UPE and MPE will be handled by normal PROMISC logic
1853 * in e1000e_set_rx_mode */
1854 rctl
|= (E1000_RCTL_SBP
| /* Receive bad packets */
1855 E1000_RCTL_BAM
| /* RX All Bcast Pkts */
1856 E1000_RCTL_PMCF
); /* RX All MAC Ctrl Pkts */
1858 rctl
&= ~(E1000_RCTL_VFE
| /* Disable VLAN filter */
1859 E1000_RCTL_DPF
| /* Allow filtered pause */
1860 E1000_RCTL_CFIEN
); /* Dis VLAN CFIEN Filter */
1861 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
1862 * and that breaks VLANs.
1870 * e1000_configure_rx - Configure 8254x Receive Unit after Reset
1871 * @adapter: board private structure
1873 * Configure the Rx unit of the MAC after a reset.
1876 static void e1000_configure_rx(struct e1000_adapter
*adapter
)
1879 struct e1000_hw
*hw
= &adapter
->hw
;
1880 u32 rdlen
, rctl
, rxcsum
;
1882 if (adapter
->netdev
->mtu
> ETH_DATA_LEN
) {
1883 rdlen
= adapter
->rx_ring
[0].count
*
1884 sizeof(struct e1000_rx_desc
);
1885 adapter
->clean_rx
= e1000_clean_jumbo_rx_irq
;
1886 adapter
->alloc_rx_buf
= e1000_alloc_jumbo_rx_buffers
;
1888 rdlen
= adapter
->rx_ring
[0].count
*
1889 sizeof(struct e1000_rx_desc
);
1890 adapter
->clean_rx
= e1000_clean_rx_irq
;
1891 adapter
->alloc_rx_buf
= e1000_alloc_rx_buffers
;
1894 /* disable receives while setting up the descriptors */
1896 ew32(RCTL
, rctl
& ~E1000_RCTL_EN
);
1898 /* set the Receive Delay Timer Register */
1899 ew32(RDTR
, adapter
->rx_int_delay
);
1901 if (hw
->mac_type
>= e1000_82540
) {
1902 ew32(RADV
, adapter
->rx_abs_int_delay
);
1903 if (adapter
->itr_setting
!= 0)
1904 ew32(ITR
, 1000000000 / (adapter
->itr
* 256));
1907 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1908 * the Base and Length of the Rx Descriptor Ring */
1909 switch (adapter
->num_rx_queues
) {
1912 rdba
= adapter
->rx_ring
[0].dma
;
1914 ew32(RDBAH
, (rdba
>> 32));
1915 ew32(RDBAL
, (rdba
& 0x00000000ffffffffULL
));
1918 adapter
->rx_ring
[0].rdh
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDH
: E1000_82542_RDH
);
1919 adapter
->rx_ring
[0].rdt
= ((hw
->mac_type
>= e1000_82543
) ? E1000_RDT
: E1000_82542_RDT
);
1923 /* Enable 82543 Receive Checksum Offload for TCP and UDP */
1924 if (hw
->mac_type
>= e1000_82543
) {
1925 rxcsum
= er32(RXCSUM
);
1926 if (adapter
->rx_csum
)
1927 rxcsum
|= E1000_RXCSUM_TUOFL
;
1929 /* don't need to clear IPPCSE as it defaults to 0 */
1930 rxcsum
&= ~E1000_RXCSUM_TUOFL
;
1931 ew32(RXCSUM
, rxcsum
);
1934 /* Enable Receives */
1935 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
1939 * e1000_free_tx_resources - Free Tx Resources per Queue
1940 * @adapter: board private structure
1941 * @tx_ring: Tx descriptor ring for a specific queue
1943 * Free all transmit software resources
1946 static void e1000_free_tx_resources(struct e1000_adapter
*adapter
,
1947 struct e1000_tx_ring
*tx_ring
)
1949 struct pci_dev
*pdev
= adapter
->pdev
;
1951 e1000_clean_tx_ring(adapter
, tx_ring
);
1953 vfree(tx_ring
->buffer_info
);
1954 tx_ring
->buffer_info
= NULL
;
1956 dma_free_coherent(&pdev
->dev
, tx_ring
->size
, tx_ring
->desc
,
1959 tx_ring
->desc
= NULL
;
1963 * e1000_free_all_tx_resources - Free Tx Resources for All Queues
1964 * @adapter: board private structure
1966 * Free all transmit software resources
1969 void e1000_free_all_tx_resources(struct e1000_adapter
*adapter
)
1973 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
1974 e1000_free_tx_resources(adapter
, &adapter
->tx_ring
[i
]);
1977 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter
*adapter
,
1978 struct e1000_buffer
*buffer_info
)
1980 if (buffer_info
->dma
) {
1981 if (buffer_info
->mapped_as_page
)
1982 dma_unmap_page(&adapter
->pdev
->dev
, buffer_info
->dma
,
1983 buffer_info
->length
, DMA_TO_DEVICE
);
1985 dma_unmap_single(&adapter
->pdev
->dev
, buffer_info
->dma
,
1986 buffer_info
->length
,
1988 buffer_info
->dma
= 0;
1990 if (buffer_info
->skb
) {
1991 dev_kfree_skb_any(buffer_info
->skb
);
1992 buffer_info
->skb
= NULL
;
1994 buffer_info
->time_stamp
= 0;
1995 /* buffer_info must be completely set up in the transmit path */
1999 * e1000_clean_tx_ring - Free Tx Buffers
2000 * @adapter: board private structure
2001 * @tx_ring: ring to be cleaned
2004 static void e1000_clean_tx_ring(struct e1000_adapter
*adapter
,
2005 struct e1000_tx_ring
*tx_ring
)
2007 struct e1000_hw
*hw
= &adapter
->hw
;
2008 struct e1000_buffer
*buffer_info
;
2012 /* Free all the Tx ring sk_buffs */
2014 for (i
= 0; i
< tx_ring
->count
; i
++) {
2015 buffer_info
= &tx_ring
->buffer_info
[i
];
2016 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2019 size
= sizeof(struct e1000_buffer
) * tx_ring
->count
;
2020 memset(tx_ring
->buffer_info
, 0, size
);
2022 /* Zero out the descriptor ring */
2024 memset(tx_ring
->desc
, 0, tx_ring
->size
);
2026 tx_ring
->next_to_use
= 0;
2027 tx_ring
->next_to_clean
= 0;
2028 tx_ring
->last_tx_tso
= false;
2030 writel(0, hw
->hw_addr
+ tx_ring
->tdh
);
2031 writel(0, hw
->hw_addr
+ tx_ring
->tdt
);
2035 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues
2036 * @adapter: board private structure
2039 static void e1000_clean_all_tx_rings(struct e1000_adapter
*adapter
)
2043 for (i
= 0; i
< adapter
->num_tx_queues
; i
++)
2044 e1000_clean_tx_ring(adapter
, &adapter
->tx_ring
[i
]);
2048 * e1000_free_rx_resources - Free Rx Resources
2049 * @adapter: board private structure
2050 * @rx_ring: ring to clean the resources from
2052 * Free all receive software resources
2055 static void e1000_free_rx_resources(struct e1000_adapter
*adapter
,
2056 struct e1000_rx_ring
*rx_ring
)
2058 struct pci_dev
*pdev
= adapter
->pdev
;
2060 e1000_clean_rx_ring(adapter
, rx_ring
);
2062 vfree(rx_ring
->buffer_info
);
2063 rx_ring
->buffer_info
= NULL
;
2065 dma_free_coherent(&pdev
->dev
, rx_ring
->size
, rx_ring
->desc
,
2068 rx_ring
->desc
= NULL
;
2072 * e1000_free_all_rx_resources - Free Rx Resources for All Queues
2073 * @adapter: board private structure
2075 * Free all receive software resources
2078 void e1000_free_all_rx_resources(struct e1000_adapter
*adapter
)
2082 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2083 e1000_free_rx_resources(adapter
, &adapter
->rx_ring
[i
]);
2087 * e1000_clean_rx_ring - Free Rx Buffers per Queue
2088 * @adapter: board private structure
2089 * @rx_ring: ring to free buffers from
2092 static void e1000_clean_rx_ring(struct e1000_adapter
*adapter
,
2093 struct e1000_rx_ring
*rx_ring
)
2095 struct e1000_hw
*hw
= &adapter
->hw
;
2096 struct e1000_buffer
*buffer_info
;
2097 struct pci_dev
*pdev
= adapter
->pdev
;
2101 /* Free all the Rx ring sk_buffs */
2102 for (i
= 0; i
< rx_ring
->count
; i
++) {
2103 buffer_info
= &rx_ring
->buffer_info
[i
];
2104 if (buffer_info
->dma
&&
2105 adapter
->clean_rx
== e1000_clean_rx_irq
) {
2106 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
2107 buffer_info
->length
,
2109 } else if (buffer_info
->dma
&&
2110 adapter
->clean_rx
== e1000_clean_jumbo_rx_irq
) {
2111 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
2112 buffer_info
->length
,
2116 buffer_info
->dma
= 0;
2117 if (buffer_info
->page
) {
2118 put_page(buffer_info
->page
);
2119 buffer_info
->page
= NULL
;
2121 if (buffer_info
->skb
) {
2122 dev_kfree_skb(buffer_info
->skb
);
2123 buffer_info
->skb
= NULL
;
2127 /* there also may be some cached data from a chained receive */
2128 if (rx_ring
->rx_skb_top
) {
2129 dev_kfree_skb(rx_ring
->rx_skb_top
);
2130 rx_ring
->rx_skb_top
= NULL
;
2133 size
= sizeof(struct e1000_buffer
) * rx_ring
->count
;
2134 memset(rx_ring
->buffer_info
, 0, size
);
2136 /* Zero out the descriptor ring */
2137 memset(rx_ring
->desc
, 0, rx_ring
->size
);
2139 rx_ring
->next_to_clean
= 0;
2140 rx_ring
->next_to_use
= 0;
2142 writel(0, hw
->hw_addr
+ rx_ring
->rdh
);
2143 writel(0, hw
->hw_addr
+ rx_ring
->rdt
);
2147 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues
2148 * @adapter: board private structure
2151 static void e1000_clean_all_rx_rings(struct e1000_adapter
*adapter
)
2155 for (i
= 0; i
< adapter
->num_rx_queues
; i
++)
2156 e1000_clean_rx_ring(adapter
, &adapter
->rx_ring
[i
]);
2159 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset
2160 * and memory write and invalidate disabled for certain operations
2162 static void e1000_enter_82542_rst(struct e1000_adapter
*adapter
)
2164 struct e1000_hw
*hw
= &adapter
->hw
;
2165 struct net_device
*netdev
= adapter
->netdev
;
2168 e1000_pci_clear_mwi(hw
);
2171 rctl
|= E1000_RCTL_RST
;
2173 E1000_WRITE_FLUSH();
2176 if (netif_running(netdev
))
2177 e1000_clean_all_rx_rings(adapter
);
2180 static void e1000_leave_82542_rst(struct e1000_adapter
*adapter
)
2182 struct e1000_hw
*hw
= &adapter
->hw
;
2183 struct net_device
*netdev
= adapter
->netdev
;
2187 rctl
&= ~E1000_RCTL_RST
;
2189 E1000_WRITE_FLUSH();
2192 if (hw
->pci_cmd_word
& PCI_COMMAND_INVALIDATE
)
2193 e1000_pci_set_mwi(hw
);
2195 if (netif_running(netdev
)) {
2196 /* No need to loop, because 82542 supports only 1 queue */
2197 struct e1000_rx_ring
*ring
= &adapter
->rx_ring
[0];
2198 e1000_configure_rx(adapter
);
2199 adapter
->alloc_rx_buf(adapter
, ring
, E1000_DESC_UNUSED(ring
));
2204 * e1000_set_mac - Change the Ethernet Address of the NIC
2205 * @netdev: network interface device structure
2206 * @p: pointer to an address structure
2208 * Returns 0 on success, negative on failure
2211 static int e1000_set_mac(struct net_device
*netdev
, void *p
)
2213 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2214 struct e1000_hw
*hw
= &adapter
->hw
;
2215 struct sockaddr
*addr
= p
;
2217 if (!is_valid_ether_addr(addr
->sa_data
))
2218 return -EADDRNOTAVAIL
;
2220 /* 82542 2.0 needs to be in reset to write receive address registers */
2222 if (hw
->mac_type
== e1000_82542_rev2_0
)
2223 e1000_enter_82542_rst(adapter
);
2225 memcpy(netdev
->dev_addr
, addr
->sa_data
, netdev
->addr_len
);
2226 memcpy(hw
->mac_addr
, addr
->sa_data
, netdev
->addr_len
);
2228 e1000_rar_set(hw
, hw
->mac_addr
, 0);
2230 if (hw
->mac_type
== e1000_82542_rev2_0
)
2231 e1000_leave_82542_rst(adapter
);
2237 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set
2238 * @netdev: network interface device structure
2240 * The set_rx_mode entry point is called whenever the unicast or multicast
2241 * address lists or the network interface flags are updated. This routine is
2242 * responsible for configuring the hardware for proper unicast, multicast,
2243 * promiscuous mode, and all-multi behavior.
2246 static void e1000_set_rx_mode(struct net_device
*netdev
)
2248 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
2249 struct e1000_hw
*hw
= &adapter
->hw
;
2250 struct netdev_hw_addr
*ha
;
2251 bool use_uc
= false;
2254 int i
, rar_entries
= E1000_RAR_ENTRIES
;
2255 int mta_reg_count
= E1000_NUM_MTA_REGISTERS
;
2256 u32
*mcarray
= kcalloc(mta_reg_count
, sizeof(u32
), GFP_ATOMIC
);
2259 e_err(probe
, "memory allocation failed\n");
2263 /* Check for Promiscuous and All Multicast modes */
2267 if (netdev
->flags
& IFF_PROMISC
) {
2268 rctl
|= (E1000_RCTL_UPE
| E1000_RCTL_MPE
);
2269 rctl
&= ~E1000_RCTL_VFE
;
2271 if (netdev
->flags
& IFF_ALLMULTI
)
2272 rctl
|= E1000_RCTL_MPE
;
2274 rctl
&= ~E1000_RCTL_MPE
;
2275 /* Enable VLAN filter if there is a VLAN */
2276 if (e1000_vlan_used(adapter
))
2277 rctl
|= E1000_RCTL_VFE
;
2280 if (netdev_uc_count(netdev
) > rar_entries
- 1) {
2281 rctl
|= E1000_RCTL_UPE
;
2282 } else if (!(netdev
->flags
& IFF_PROMISC
)) {
2283 rctl
&= ~E1000_RCTL_UPE
;
2289 /* 82542 2.0 needs to be in reset to write receive address registers */
2291 if (hw
->mac_type
== e1000_82542_rev2_0
)
2292 e1000_enter_82542_rst(adapter
);
2294 /* load the first 14 addresses into the exact filters 1-14. Unicast
2295 * addresses take precedence to avoid disabling unicast filtering
2298 * RAR 0 is used for the station MAC address
2299 * if there are not 14 addresses, go ahead and clear the filters
2303 netdev_for_each_uc_addr(ha
, netdev
) {
2304 if (i
== rar_entries
)
2306 e1000_rar_set(hw
, ha
->addr
, i
++);
2309 netdev_for_each_mc_addr(ha
, netdev
) {
2310 if (i
== rar_entries
) {
2311 /* load any remaining addresses into the hash table */
2312 u32 hash_reg
, hash_bit
, mta
;
2313 hash_value
= e1000_hash_mc_addr(hw
, ha
->addr
);
2314 hash_reg
= (hash_value
>> 5) & 0x7F;
2315 hash_bit
= hash_value
& 0x1F;
2316 mta
= (1 << hash_bit
);
2317 mcarray
[hash_reg
] |= mta
;
2319 e1000_rar_set(hw
, ha
->addr
, i
++);
2323 for (; i
< rar_entries
; i
++) {
2324 E1000_WRITE_REG_ARRAY(hw
, RA
, i
<< 1, 0);
2325 E1000_WRITE_FLUSH();
2326 E1000_WRITE_REG_ARRAY(hw
, RA
, (i
<< 1) + 1, 0);
2327 E1000_WRITE_FLUSH();
2330 /* write the hash table completely, write from bottom to avoid
2331 * both stupid write combining chipsets, and flushing each write */
2332 for (i
= mta_reg_count
- 1; i
>= 0 ; i
--) {
2334 * If we are on an 82544 has an errata where writing odd
2335 * offsets overwrites the previous even offset, but writing
2336 * backwards over the range solves the issue by always
2337 * writing the odd offset first
2339 E1000_WRITE_REG_ARRAY(hw
, MTA
, i
, mcarray
[i
]);
2341 E1000_WRITE_FLUSH();
2343 if (hw
->mac_type
== e1000_82542_rev2_0
)
2344 e1000_leave_82542_rst(adapter
);
2350 * e1000_update_phy_info_task - get phy info
2351 * @work: work struct contained inside adapter struct
2353 * Need to wait a few seconds after link up to get diagnostic information from
2356 static void e1000_update_phy_info_task(struct work_struct
*work
)
2358 struct e1000_adapter
*adapter
= container_of(work
,
2359 struct e1000_adapter
,
2360 phy_info_task
.work
);
2361 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2363 mutex_lock(&adapter
->mutex
);
2364 e1000_phy_get_info(&adapter
->hw
, &adapter
->phy_info
);
2365 mutex_unlock(&adapter
->mutex
);
2369 * e1000_82547_tx_fifo_stall_task - task to complete work
2370 * @work: work struct contained inside adapter struct
2372 static void e1000_82547_tx_fifo_stall_task(struct work_struct
*work
)
2374 struct e1000_adapter
*adapter
= container_of(work
,
2375 struct e1000_adapter
,
2376 fifo_stall_task
.work
);
2377 struct e1000_hw
*hw
= &adapter
->hw
;
2378 struct net_device
*netdev
= adapter
->netdev
;
2381 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2383 mutex_lock(&adapter
->mutex
);
2384 if (atomic_read(&adapter
->tx_fifo_stall
)) {
2385 if ((er32(TDT
) == er32(TDH
)) &&
2386 (er32(TDFT
) == er32(TDFH
)) &&
2387 (er32(TDFTS
) == er32(TDFHS
))) {
2389 ew32(TCTL
, tctl
& ~E1000_TCTL_EN
);
2390 ew32(TDFT
, adapter
->tx_head_addr
);
2391 ew32(TDFH
, adapter
->tx_head_addr
);
2392 ew32(TDFTS
, adapter
->tx_head_addr
);
2393 ew32(TDFHS
, adapter
->tx_head_addr
);
2395 E1000_WRITE_FLUSH();
2397 adapter
->tx_fifo_head
= 0;
2398 atomic_set(&adapter
->tx_fifo_stall
, 0);
2399 netif_wake_queue(netdev
);
2400 } else if (!test_bit(__E1000_DOWN
, &adapter
->flags
)) {
2401 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
2404 mutex_unlock(&adapter
->mutex
);
2407 bool e1000_has_link(struct e1000_adapter
*adapter
)
2409 struct e1000_hw
*hw
= &adapter
->hw
;
2410 bool link_active
= false;
2412 /* get_link_status is set on LSC (link status) interrupt or rx
2413 * sequence error interrupt (except on intel ce4100).
2414 * get_link_status will stay false until the
2415 * e1000_check_for_link establishes link for copper adapters
2418 switch (hw
->media_type
) {
2419 case e1000_media_type_copper
:
2420 if (hw
->mac_type
== e1000_ce4100
)
2421 hw
->get_link_status
= 1;
2422 if (hw
->get_link_status
) {
2423 e1000_check_for_link(hw
);
2424 link_active
= !hw
->get_link_status
;
2429 case e1000_media_type_fiber
:
2430 e1000_check_for_link(hw
);
2431 link_active
= !!(er32(STATUS
) & E1000_STATUS_LU
);
2433 case e1000_media_type_internal_serdes
:
2434 e1000_check_for_link(hw
);
2435 link_active
= hw
->serdes_has_link
;
2445 * e1000_watchdog - work function
2446 * @work: work struct contained inside adapter struct
2448 static void e1000_watchdog(struct work_struct
*work
)
2450 struct e1000_adapter
*adapter
= container_of(work
,
2451 struct e1000_adapter
,
2452 watchdog_task
.work
);
2453 struct e1000_hw
*hw
= &adapter
->hw
;
2454 struct net_device
*netdev
= adapter
->netdev
;
2455 struct e1000_tx_ring
*txdr
= adapter
->tx_ring
;
2458 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
2461 mutex_lock(&adapter
->mutex
);
2462 link
= e1000_has_link(adapter
);
2463 if ((netif_carrier_ok(netdev
)) && link
)
2467 if (!netif_carrier_ok(netdev
)) {
2470 /* update snapshot of PHY registers on LSC */
2471 e1000_get_speed_and_duplex(hw
,
2472 &adapter
->link_speed
,
2473 &adapter
->link_duplex
);
2476 pr_info("%s NIC Link is Up %d Mbps %s, "
2477 "Flow Control: %s\n",
2479 adapter
->link_speed
,
2480 adapter
->link_duplex
== FULL_DUPLEX
?
2481 "Full Duplex" : "Half Duplex",
2482 ((ctrl
& E1000_CTRL_TFCE
) && (ctrl
&
2483 E1000_CTRL_RFCE
)) ? "RX/TX" : ((ctrl
&
2484 E1000_CTRL_RFCE
) ? "RX" : ((ctrl
&
2485 E1000_CTRL_TFCE
) ? "TX" : "None")));
2487 /* adjust timeout factor according to speed/duplex */
2488 adapter
->tx_timeout_factor
= 1;
2489 switch (adapter
->link_speed
) {
2492 adapter
->tx_timeout_factor
= 16;
2496 /* maybe add some timeout factor ? */
2500 /* enable transmits in the hardware */
2502 tctl
|= E1000_TCTL_EN
;
2505 netif_carrier_on(netdev
);
2506 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2507 schedule_delayed_work(&adapter
->phy_info_task
,
2509 adapter
->smartspeed
= 0;
2512 if (netif_carrier_ok(netdev
)) {
2513 adapter
->link_speed
= 0;
2514 adapter
->link_duplex
= 0;
2515 pr_info("%s NIC Link is Down\n",
2517 netif_carrier_off(netdev
);
2519 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2520 schedule_delayed_work(&adapter
->phy_info_task
,
2524 e1000_smartspeed(adapter
);
2528 e1000_update_stats(adapter
);
2530 hw
->tx_packet_delta
= adapter
->stats
.tpt
- adapter
->tpt_old
;
2531 adapter
->tpt_old
= adapter
->stats
.tpt
;
2532 hw
->collision_delta
= adapter
->stats
.colc
- adapter
->colc_old
;
2533 adapter
->colc_old
= adapter
->stats
.colc
;
2535 adapter
->gorcl
= adapter
->stats
.gorcl
- adapter
->gorcl_old
;
2536 adapter
->gorcl_old
= adapter
->stats
.gorcl
;
2537 adapter
->gotcl
= adapter
->stats
.gotcl
- adapter
->gotcl_old
;
2538 adapter
->gotcl_old
= adapter
->stats
.gotcl
;
2540 e1000_update_adaptive(hw
);
2542 if (!netif_carrier_ok(netdev
)) {
2543 if (E1000_DESC_UNUSED(txdr
) + 1 < txdr
->count
) {
2544 /* We've lost link, so the controller stops DMA,
2545 * but we've got queued Tx work that's never going
2546 * to get done, so reset controller to flush Tx.
2547 * (Do the reset outside of interrupt context). */
2548 adapter
->tx_timeout_count
++;
2549 schedule_work(&adapter
->reset_task
);
2550 /* exit immediately since reset is imminent */
2555 /* Simple mode for Interrupt Throttle Rate (ITR) */
2556 if (hw
->mac_type
>= e1000_82540
&& adapter
->itr_setting
== 4) {
2558 * Symmetric Tx/Rx gets a reduced ITR=2000;
2559 * Total asymmetrical Tx or Rx gets ITR=8000;
2560 * everyone else is between 2000-8000.
2562 u32 goc
= (adapter
->gotcl
+ adapter
->gorcl
) / 10000;
2563 u32 dif
= (adapter
->gotcl
> adapter
->gorcl
?
2564 adapter
->gotcl
- adapter
->gorcl
:
2565 adapter
->gorcl
- adapter
->gotcl
) / 10000;
2566 u32 itr
= goc
> 0 ? (dif
* 6000 / goc
+ 2000) : 8000;
2568 ew32(ITR
, 1000000000 / (itr
* 256));
2571 /* Cause software interrupt to ensure rx ring is cleaned */
2572 ew32(ICS
, E1000_ICS_RXDMT0
);
2574 /* Force detection of hung controller every watchdog period */
2575 adapter
->detect_tx_hung
= true;
2577 /* Reschedule the task */
2578 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
2579 schedule_delayed_work(&adapter
->watchdog_task
, 2 * HZ
);
2582 mutex_unlock(&adapter
->mutex
);
2585 enum latency_range
{
2589 latency_invalid
= 255
2593 * e1000_update_itr - update the dynamic ITR value based on statistics
2594 * @adapter: pointer to adapter
2595 * @itr_setting: current adapter->itr
2596 * @packets: the number of packets during this measurement interval
2597 * @bytes: the number of bytes during this measurement interval
2599 * Stores a new ITR value based on packets and byte
2600 * counts during the last interrupt. The advantage of per interrupt
2601 * computation is faster updates and more accurate ITR for the current
2602 * traffic pattern. Constants in this function were computed
2603 * based on theoretical maximum wire speed and thresholds were set based
2604 * on testing data as well as attempting to minimize response time
2605 * while increasing bulk throughput.
2606 * this functionality is controlled by the InterruptThrottleRate module
2607 * parameter (see e1000_param.c)
2609 static unsigned int e1000_update_itr(struct e1000_adapter
*adapter
,
2610 u16 itr_setting
, int packets
, int bytes
)
2612 unsigned int retval
= itr_setting
;
2613 struct e1000_hw
*hw
= &adapter
->hw
;
2615 if (unlikely(hw
->mac_type
< e1000_82540
))
2616 goto update_itr_done
;
2619 goto update_itr_done
;
2621 switch (itr_setting
) {
2622 case lowest_latency
:
2623 /* jumbo frames get bulk treatment*/
2624 if (bytes
/packets
> 8000)
2625 retval
= bulk_latency
;
2626 else if ((packets
< 5) && (bytes
> 512))
2627 retval
= low_latency
;
2629 case low_latency
: /* 50 usec aka 20000 ints/s */
2630 if (bytes
> 10000) {
2631 /* jumbo frames need bulk latency setting */
2632 if (bytes
/packets
> 8000)
2633 retval
= bulk_latency
;
2634 else if ((packets
< 10) || ((bytes
/packets
) > 1200))
2635 retval
= bulk_latency
;
2636 else if ((packets
> 35))
2637 retval
= lowest_latency
;
2638 } else if (bytes
/packets
> 2000)
2639 retval
= bulk_latency
;
2640 else if (packets
<= 2 && bytes
< 512)
2641 retval
= lowest_latency
;
2643 case bulk_latency
: /* 250 usec aka 4000 ints/s */
2644 if (bytes
> 25000) {
2646 retval
= low_latency
;
2647 } else if (bytes
< 6000) {
2648 retval
= low_latency
;
2657 static void e1000_set_itr(struct e1000_adapter
*adapter
)
2659 struct e1000_hw
*hw
= &adapter
->hw
;
2661 u32 new_itr
= adapter
->itr
;
2663 if (unlikely(hw
->mac_type
< e1000_82540
))
2666 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2667 if (unlikely(adapter
->link_speed
!= SPEED_1000
)) {
2673 adapter
->tx_itr
= e1000_update_itr(adapter
,
2675 adapter
->total_tx_packets
,
2676 adapter
->total_tx_bytes
);
2677 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2678 if (adapter
->itr_setting
== 3 && adapter
->tx_itr
== lowest_latency
)
2679 adapter
->tx_itr
= low_latency
;
2681 adapter
->rx_itr
= e1000_update_itr(adapter
,
2683 adapter
->total_rx_packets
,
2684 adapter
->total_rx_bytes
);
2685 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2686 if (adapter
->itr_setting
== 3 && adapter
->rx_itr
== lowest_latency
)
2687 adapter
->rx_itr
= low_latency
;
2689 current_itr
= max(adapter
->rx_itr
, adapter
->tx_itr
);
2691 switch (current_itr
) {
2692 /* counts and packets in update_itr are dependent on these numbers */
2693 case lowest_latency
:
2697 new_itr
= 20000; /* aka hwitr = ~200 */
2707 if (new_itr
!= adapter
->itr
) {
2708 /* this attempts to bias the interrupt rate towards Bulk
2709 * by adding intermediate steps when interrupt rate is
2711 new_itr
= new_itr
> adapter
->itr
?
2712 min(adapter
->itr
+ (new_itr
>> 2), new_itr
) :
2714 adapter
->itr
= new_itr
;
2715 ew32(ITR
, 1000000000 / (new_itr
* 256));
2719 #define E1000_TX_FLAGS_CSUM 0x00000001
2720 #define E1000_TX_FLAGS_VLAN 0x00000002
2721 #define E1000_TX_FLAGS_TSO 0x00000004
2722 #define E1000_TX_FLAGS_IPV4 0x00000008
2723 #define E1000_TX_FLAGS_NO_FCS 0x00000010
2724 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
2725 #define E1000_TX_FLAGS_VLAN_SHIFT 16
2727 static int e1000_tso(struct e1000_adapter
*adapter
,
2728 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2730 struct e1000_context_desc
*context_desc
;
2731 struct e1000_buffer
*buffer_info
;
2734 u16 ipcse
= 0, tucse
, mss
;
2735 u8 ipcss
, ipcso
, tucss
, tucso
, hdr_len
;
2738 if (skb_is_gso(skb
)) {
2739 if (skb_header_cloned(skb
)) {
2740 err
= pskb_expand_head(skb
, 0, 0, GFP_ATOMIC
);
2745 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
2746 mss
= skb_shinfo(skb
)->gso_size
;
2747 if (skb
->protocol
== htons(ETH_P_IP
)) {
2748 struct iphdr
*iph
= ip_hdr(skb
);
2751 tcp_hdr(skb
)->check
= ~csum_tcpudp_magic(iph
->saddr
,
2755 cmd_length
= E1000_TXD_CMD_IP
;
2756 ipcse
= skb_transport_offset(skb
) - 1;
2757 } else if (skb
->protocol
== htons(ETH_P_IPV6
)) {
2758 ipv6_hdr(skb
)->payload_len
= 0;
2759 tcp_hdr(skb
)->check
=
2760 ~csum_ipv6_magic(&ipv6_hdr(skb
)->saddr
,
2761 &ipv6_hdr(skb
)->daddr
,
2765 ipcss
= skb_network_offset(skb
);
2766 ipcso
= (void *)&(ip_hdr(skb
)->check
) - (void *)skb
->data
;
2767 tucss
= skb_transport_offset(skb
);
2768 tucso
= (void *)&(tcp_hdr(skb
)->check
) - (void *)skb
->data
;
2771 cmd_length
|= (E1000_TXD_CMD_DEXT
| E1000_TXD_CMD_TSE
|
2772 E1000_TXD_CMD_TCP
| (skb
->len
- (hdr_len
)));
2774 i
= tx_ring
->next_to_use
;
2775 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2776 buffer_info
= &tx_ring
->buffer_info
[i
];
2778 context_desc
->lower_setup
.ip_fields
.ipcss
= ipcss
;
2779 context_desc
->lower_setup
.ip_fields
.ipcso
= ipcso
;
2780 context_desc
->lower_setup
.ip_fields
.ipcse
= cpu_to_le16(ipcse
);
2781 context_desc
->upper_setup
.tcp_fields
.tucss
= tucss
;
2782 context_desc
->upper_setup
.tcp_fields
.tucso
= tucso
;
2783 context_desc
->upper_setup
.tcp_fields
.tucse
= cpu_to_le16(tucse
);
2784 context_desc
->tcp_seg_setup
.fields
.mss
= cpu_to_le16(mss
);
2785 context_desc
->tcp_seg_setup
.fields
.hdr_len
= hdr_len
;
2786 context_desc
->cmd_and_length
= cpu_to_le32(cmd_length
);
2788 buffer_info
->time_stamp
= jiffies
;
2789 buffer_info
->next_to_watch
= i
;
2791 if (++i
== tx_ring
->count
) i
= 0;
2792 tx_ring
->next_to_use
= i
;
2799 static bool e1000_tx_csum(struct e1000_adapter
*adapter
,
2800 struct e1000_tx_ring
*tx_ring
, struct sk_buff
*skb
)
2802 struct e1000_context_desc
*context_desc
;
2803 struct e1000_buffer
*buffer_info
;
2806 u32 cmd_len
= E1000_TXD_CMD_DEXT
;
2808 if (skb
->ip_summed
!= CHECKSUM_PARTIAL
)
2811 switch (skb
->protocol
) {
2812 case cpu_to_be16(ETH_P_IP
):
2813 if (ip_hdr(skb
)->protocol
== IPPROTO_TCP
)
2814 cmd_len
|= E1000_TXD_CMD_TCP
;
2816 case cpu_to_be16(ETH_P_IPV6
):
2817 /* XXX not handling all IPV6 headers */
2818 if (ipv6_hdr(skb
)->nexthdr
== IPPROTO_TCP
)
2819 cmd_len
|= E1000_TXD_CMD_TCP
;
2822 if (unlikely(net_ratelimit()))
2823 e_warn(drv
, "checksum_partial proto=%x!\n",
2828 css
= skb_checksum_start_offset(skb
);
2830 i
= tx_ring
->next_to_use
;
2831 buffer_info
= &tx_ring
->buffer_info
[i
];
2832 context_desc
= E1000_CONTEXT_DESC(*tx_ring
, i
);
2834 context_desc
->lower_setup
.ip_config
= 0;
2835 context_desc
->upper_setup
.tcp_fields
.tucss
= css
;
2836 context_desc
->upper_setup
.tcp_fields
.tucso
=
2837 css
+ skb
->csum_offset
;
2838 context_desc
->upper_setup
.tcp_fields
.tucse
= 0;
2839 context_desc
->tcp_seg_setup
.data
= 0;
2840 context_desc
->cmd_and_length
= cpu_to_le32(cmd_len
);
2842 buffer_info
->time_stamp
= jiffies
;
2843 buffer_info
->next_to_watch
= i
;
2845 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
2846 tx_ring
->next_to_use
= i
;
2851 #define E1000_MAX_TXD_PWR 12
2852 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR)
2854 static int e1000_tx_map(struct e1000_adapter
*adapter
,
2855 struct e1000_tx_ring
*tx_ring
,
2856 struct sk_buff
*skb
, unsigned int first
,
2857 unsigned int max_per_txd
, unsigned int nr_frags
,
2860 struct e1000_hw
*hw
= &adapter
->hw
;
2861 struct pci_dev
*pdev
= adapter
->pdev
;
2862 struct e1000_buffer
*buffer_info
;
2863 unsigned int len
= skb_headlen(skb
);
2864 unsigned int offset
= 0, size
, count
= 0, i
;
2865 unsigned int f
, bytecount
, segs
;
2867 i
= tx_ring
->next_to_use
;
2870 buffer_info
= &tx_ring
->buffer_info
[i
];
2871 size
= min(len
, max_per_txd
);
2872 /* Workaround for Controller erratum --
2873 * descriptor for non-tso packet in a linear SKB that follows a
2874 * tso gets written back prematurely before the data is fully
2875 * DMA'd to the controller */
2876 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&&
2878 tx_ring
->last_tx_tso
= false;
2882 /* Workaround for premature desc write-backs
2883 * in TSO mode. Append 4-byte sentinel desc */
2884 if (unlikely(mss
&& !nr_frags
&& size
== len
&& size
> 8))
2886 /* work-around for errata 10 and it applies
2887 * to all controllers in PCI-X mode
2888 * The fix is to make sure that the first descriptor of a
2889 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes
2891 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
2892 (size
> 2015) && count
== 0))
2895 /* Workaround for potential 82544 hang in PCI-X. Avoid
2896 * terminating buffers within evenly-aligned dwords. */
2897 if (unlikely(adapter
->pcix_82544
&&
2898 !((unsigned long)(skb
->data
+ offset
+ size
- 1) & 4) &&
2902 buffer_info
->length
= size
;
2903 /* set time_stamp *before* dma to help avoid a possible race */
2904 buffer_info
->time_stamp
= jiffies
;
2905 buffer_info
->mapped_as_page
= false;
2906 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
2908 size
, DMA_TO_DEVICE
);
2909 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2911 buffer_info
->next_to_watch
= i
;
2918 if (unlikely(i
== tx_ring
->count
))
2923 for (f
= 0; f
< nr_frags
; f
++) {
2924 const struct skb_frag_struct
*frag
;
2926 frag
= &skb_shinfo(skb
)->frags
[f
];
2927 len
= skb_frag_size(frag
);
2931 unsigned long bufend
;
2933 if (unlikely(i
== tx_ring
->count
))
2936 buffer_info
= &tx_ring
->buffer_info
[i
];
2937 size
= min(len
, max_per_txd
);
2938 /* Workaround for premature desc write-backs
2939 * in TSO mode. Append 4-byte sentinel desc */
2940 if (unlikely(mss
&& f
== (nr_frags
-1) && size
== len
&& size
> 8))
2942 /* Workaround for potential 82544 hang in PCI-X.
2943 * Avoid terminating buffers within evenly-aligned
2945 bufend
= (unsigned long)
2946 page_to_phys(skb_frag_page(frag
));
2947 bufend
+= offset
+ size
- 1;
2948 if (unlikely(adapter
->pcix_82544
&&
2953 buffer_info
->length
= size
;
2954 buffer_info
->time_stamp
= jiffies
;
2955 buffer_info
->mapped_as_page
= true;
2956 buffer_info
->dma
= skb_frag_dma_map(&pdev
->dev
, frag
,
2957 offset
, size
, DMA_TO_DEVICE
);
2958 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
))
2960 buffer_info
->next_to_watch
= i
;
2968 segs
= skb_shinfo(skb
)->gso_segs
?: 1;
2969 /* multiply data chunks by size of headers */
2970 bytecount
= ((segs
- 1) * skb_headlen(skb
)) + skb
->len
;
2972 tx_ring
->buffer_info
[i
].skb
= skb
;
2973 tx_ring
->buffer_info
[i
].segs
= segs
;
2974 tx_ring
->buffer_info
[i
].bytecount
= bytecount
;
2975 tx_ring
->buffer_info
[first
].next_to_watch
= i
;
2980 dev_err(&pdev
->dev
, "TX DMA map failed\n");
2981 buffer_info
->dma
= 0;
2987 i
+= tx_ring
->count
;
2989 buffer_info
= &tx_ring
->buffer_info
[i
];
2990 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
2996 static void e1000_tx_queue(struct e1000_adapter
*adapter
,
2997 struct e1000_tx_ring
*tx_ring
, int tx_flags
,
3000 struct e1000_hw
*hw
= &adapter
->hw
;
3001 struct e1000_tx_desc
*tx_desc
= NULL
;
3002 struct e1000_buffer
*buffer_info
;
3003 u32 txd_upper
= 0, txd_lower
= E1000_TXD_CMD_IFCS
;
3006 if (likely(tx_flags
& E1000_TX_FLAGS_TSO
)) {
3007 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
|
3009 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3011 if (likely(tx_flags
& E1000_TX_FLAGS_IPV4
))
3012 txd_upper
|= E1000_TXD_POPTS_IXSM
<< 8;
3015 if (likely(tx_flags
& E1000_TX_FLAGS_CSUM
)) {
3016 txd_lower
|= E1000_TXD_CMD_DEXT
| E1000_TXD_DTYP_D
;
3017 txd_upper
|= E1000_TXD_POPTS_TXSM
<< 8;
3020 if (unlikely(tx_flags
& E1000_TX_FLAGS_VLAN
)) {
3021 txd_lower
|= E1000_TXD_CMD_VLE
;
3022 txd_upper
|= (tx_flags
& E1000_TX_FLAGS_VLAN_MASK
);
3025 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
3026 txd_lower
&= ~(E1000_TXD_CMD_IFCS
);
3028 i
= tx_ring
->next_to_use
;
3031 buffer_info
= &tx_ring
->buffer_info
[i
];
3032 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3033 tx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
3034 tx_desc
->lower
.data
=
3035 cpu_to_le32(txd_lower
| buffer_info
->length
);
3036 tx_desc
->upper
.data
= cpu_to_le32(txd_upper
);
3037 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3040 tx_desc
->lower
.data
|= cpu_to_le32(adapter
->txd_cmd
);
3042 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
3043 if (unlikely(tx_flags
& E1000_TX_FLAGS_NO_FCS
))
3044 tx_desc
->lower
.data
&= ~(cpu_to_le32(E1000_TXD_CMD_IFCS
));
3046 /* Force memory writes to complete before letting h/w
3047 * know there are new descriptors to fetch. (Only
3048 * applicable for weak-ordered memory model archs,
3049 * such as IA-64). */
3052 tx_ring
->next_to_use
= i
;
3053 writel(i
, hw
->hw_addr
+ tx_ring
->tdt
);
3054 /* we need this if more than one processor can write to our tail
3055 * at a time, it syncronizes IO on IA64/Altix systems */
3060 * 82547 workaround to avoid controller hang in half-duplex environment.
3061 * The workaround is to avoid queuing a large packet that would span
3062 * the internal Tx FIFO ring boundary by notifying the stack to resend
3063 * the packet at a later time. This gives the Tx FIFO an opportunity to
3064 * flush all packets. When that occurs, we reset the Tx FIFO pointers
3065 * to the beginning of the Tx FIFO.
3068 #define E1000_FIFO_HDR 0x10
3069 #define E1000_82547_PAD_LEN 0x3E0
3071 static int e1000_82547_fifo_workaround(struct e1000_adapter
*adapter
,
3072 struct sk_buff
*skb
)
3074 u32 fifo_space
= adapter
->tx_fifo_size
- adapter
->tx_fifo_head
;
3075 u32 skb_fifo_len
= skb
->len
+ E1000_FIFO_HDR
;
3077 skb_fifo_len
= ALIGN(skb_fifo_len
, E1000_FIFO_HDR
);
3079 if (adapter
->link_duplex
!= HALF_DUPLEX
)
3080 goto no_fifo_stall_required
;
3082 if (atomic_read(&adapter
->tx_fifo_stall
))
3085 if (skb_fifo_len
>= (E1000_82547_PAD_LEN
+ fifo_space
)) {
3086 atomic_set(&adapter
->tx_fifo_stall
, 1);
3090 no_fifo_stall_required
:
3091 adapter
->tx_fifo_head
+= skb_fifo_len
;
3092 if (adapter
->tx_fifo_head
>= adapter
->tx_fifo_size
)
3093 adapter
->tx_fifo_head
-= adapter
->tx_fifo_size
;
3097 static int __e1000_maybe_stop_tx(struct net_device
*netdev
, int size
)
3099 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3100 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3102 netif_stop_queue(netdev
);
3103 /* Herbert's original patch had:
3104 * smp_mb__after_netif_stop_queue();
3105 * but since that doesn't exist yet, just open code it. */
3108 /* We need to check again in a case another CPU has just
3109 * made room available. */
3110 if (likely(E1000_DESC_UNUSED(tx_ring
) < size
))
3114 netif_start_queue(netdev
);
3115 ++adapter
->restart_queue
;
3119 static int e1000_maybe_stop_tx(struct net_device
*netdev
,
3120 struct e1000_tx_ring
*tx_ring
, int size
)
3122 if (likely(E1000_DESC_UNUSED(tx_ring
) >= size
))
3124 return __e1000_maybe_stop_tx(netdev
, size
);
3127 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3128 static netdev_tx_t
e1000_xmit_frame(struct sk_buff
*skb
,
3129 struct net_device
*netdev
)
3131 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3132 struct e1000_hw
*hw
= &adapter
->hw
;
3133 struct e1000_tx_ring
*tx_ring
;
3134 unsigned int first
, max_per_txd
= E1000_MAX_DATA_PER_TXD
;
3135 unsigned int max_txd_pwr
= E1000_MAX_TXD_PWR
;
3136 unsigned int tx_flags
= 0;
3137 unsigned int len
= skb_headlen(skb
);
3138 unsigned int nr_frags
;
3144 /* This goes back to the question of how to logically map a tx queue
3145 * to a flow. Right now, performance is impacted slightly negatively
3146 * if using multiple tx queues. If the stack breaks away from a
3147 * single qdisc implementation, we can look at this again. */
3148 tx_ring
= adapter
->tx_ring
;
3150 if (unlikely(skb
->len
<= 0)) {
3151 dev_kfree_skb_any(skb
);
3152 return NETDEV_TX_OK
;
3155 mss
= skb_shinfo(skb
)->gso_size
;
3156 /* The controller does a simple calculation to
3157 * make sure there is enough room in the FIFO before
3158 * initiating the DMA for each buffer. The calc is:
3159 * 4 = ceil(buffer len/mss). To make sure we don't
3160 * overrun the FIFO, adjust the max buffer len if mss
3164 max_per_txd
= min(mss
<< 2, max_per_txd
);
3165 max_txd_pwr
= fls(max_per_txd
) - 1;
3167 hdr_len
= skb_transport_offset(skb
) + tcp_hdrlen(skb
);
3168 if (skb
->data_len
&& hdr_len
== len
) {
3169 switch (hw
->mac_type
) {
3170 unsigned int pull_size
;
3172 /* Make sure we have room to chop off 4 bytes,
3173 * and that the end alignment will work out to
3174 * this hardware's requirements
3175 * NOTE: this is a TSO only workaround
3176 * if end byte alignment not correct move us
3177 * into the next dword */
3178 if ((unsigned long)(skb_tail_pointer(skb
) - 1) & 4)
3181 pull_size
= min((unsigned int)4, skb
->data_len
);
3182 if (!__pskb_pull_tail(skb
, pull_size
)) {
3183 e_err(drv
, "__pskb_pull_tail "
3185 dev_kfree_skb_any(skb
);
3186 return NETDEV_TX_OK
;
3188 len
= skb_headlen(skb
);
3197 /* reserve a descriptor for the offload context */
3198 if ((mss
) || (skb
->ip_summed
== CHECKSUM_PARTIAL
))
3202 /* Controller Erratum workaround */
3203 if (!skb
->data_len
&& tx_ring
->last_tx_tso
&& !skb_is_gso(skb
))
3206 count
+= TXD_USE_COUNT(len
, max_txd_pwr
);
3208 if (adapter
->pcix_82544
)
3211 /* work-around for errata 10 and it applies to all controllers
3212 * in PCI-X mode, so add one more descriptor to the count
3214 if (unlikely((hw
->bus_type
== e1000_bus_type_pcix
) &&
3218 nr_frags
= skb_shinfo(skb
)->nr_frags
;
3219 for (f
= 0; f
< nr_frags
; f
++)
3220 count
+= TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb
)->frags
[f
]),
3222 if (adapter
->pcix_82544
)
3225 /* need: count + 2 desc gap to keep tail from touching
3226 * head, otherwise try next time */
3227 if (unlikely(e1000_maybe_stop_tx(netdev
, tx_ring
, count
+ 2)))
3228 return NETDEV_TX_BUSY
;
3230 if (unlikely((hw
->mac_type
== e1000_82547
) &&
3231 (e1000_82547_fifo_workaround(adapter
, skb
)))) {
3232 netif_stop_queue(netdev
);
3233 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3234 schedule_delayed_work(&adapter
->fifo_stall_task
, 1);
3235 return NETDEV_TX_BUSY
;
3238 if (vlan_tx_tag_present(skb
)) {
3239 tx_flags
|= E1000_TX_FLAGS_VLAN
;
3240 tx_flags
|= (vlan_tx_tag_get(skb
) << E1000_TX_FLAGS_VLAN_SHIFT
);
3243 first
= tx_ring
->next_to_use
;
3245 tso
= e1000_tso(adapter
, tx_ring
, skb
);
3247 dev_kfree_skb_any(skb
);
3248 return NETDEV_TX_OK
;
3252 if (likely(hw
->mac_type
!= e1000_82544
))
3253 tx_ring
->last_tx_tso
= true;
3254 tx_flags
|= E1000_TX_FLAGS_TSO
;
3255 } else if (likely(e1000_tx_csum(adapter
, tx_ring
, skb
)))
3256 tx_flags
|= E1000_TX_FLAGS_CSUM
;
3258 if (likely(skb
->protocol
== htons(ETH_P_IP
)))
3259 tx_flags
|= E1000_TX_FLAGS_IPV4
;
3261 if (unlikely(skb
->no_fcs
))
3262 tx_flags
|= E1000_TX_FLAGS_NO_FCS
;
3264 count
= e1000_tx_map(adapter
, tx_ring
, skb
, first
, max_per_txd
,
3268 skb_tx_timestamp(skb
);
3270 e1000_tx_queue(adapter
, tx_ring
, tx_flags
, count
);
3271 /* Make sure there is space in the ring for the next send. */
3272 e1000_maybe_stop_tx(netdev
, tx_ring
, MAX_SKB_FRAGS
+ 2);
3275 dev_kfree_skb_any(skb
);
3276 tx_ring
->buffer_info
[first
].time_stamp
= 0;
3277 tx_ring
->next_to_use
= first
;
3280 return NETDEV_TX_OK
;
3283 #define NUM_REGS 38 /* 1 based count */
3284 static void e1000_regdump(struct e1000_adapter
*adapter
)
3286 struct e1000_hw
*hw
= &adapter
->hw
;
3288 u32
*regs_buff
= regs
;
3291 static const char * const reg_name
[] = {
3293 "RCTL", "RDLEN", "RDH", "RDT", "RDTR",
3294 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT",
3295 "TIDV", "TXDCTL", "TADV", "TARC0",
3296 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1",
3298 "CTRL_EXT", "ERT", "RDBAL", "RDBAH",
3299 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC",
3300 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC"
3303 regs_buff
[0] = er32(CTRL
);
3304 regs_buff
[1] = er32(STATUS
);
3306 regs_buff
[2] = er32(RCTL
);
3307 regs_buff
[3] = er32(RDLEN
);
3308 regs_buff
[4] = er32(RDH
);
3309 regs_buff
[5] = er32(RDT
);
3310 regs_buff
[6] = er32(RDTR
);
3312 regs_buff
[7] = er32(TCTL
);
3313 regs_buff
[8] = er32(TDBAL
);
3314 regs_buff
[9] = er32(TDBAH
);
3315 regs_buff
[10] = er32(TDLEN
);
3316 regs_buff
[11] = er32(TDH
);
3317 regs_buff
[12] = er32(TDT
);
3318 regs_buff
[13] = er32(TIDV
);
3319 regs_buff
[14] = er32(TXDCTL
);
3320 regs_buff
[15] = er32(TADV
);
3321 regs_buff
[16] = er32(TARC0
);
3323 regs_buff
[17] = er32(TDBAL1
);
3324 regs_buff
[18] = er32(TDBAH1
);
3325 regs_buff
[19] = er32(TDLEN1
);
3326 regs_buff
[20] = er32(TDH1
);
3327 regs_buff
[21] = er32(TDT1
);
3328 regs_buff
[22] = er32(TXDCTL1
);
3329 regs_buff
[23] = er32(TARC1
);
3330 regs_buff
[24] = er32(CTRL_EXT
);
3331 regs_buff
[25] = er32(ERT
);
3332 regs_buff
[26] = er32(RDBAL0
);
3333 regs_buff
[27] = er32(RDBAH0
);
3334 regs_buff
[28] = er32(TDFH
);
3335 regs_buff
[29] = er32(TDFT
);
3336 regs_buff
[30] = er32(TDFHS
);
3337 regs_buff
[31] = er32(TDFTS
);
3338 regs_buff
[32] = er32(TDFPC
);
3339 regs_buff
[33] = er32(RDFH
);
3340 regs_buff
[34] = er32(RDFT
);
3341 regs_buff
[35] = er32(RDFHS
);
3342 regs_buff
[36] = er32(RDFTS
);
3343 regs_buff
[37] = er32(RDFPC
);
3345 pr_info("Register dump\n");
3346 for (i
= 0; i
< NUM_REGS
; i
++)
3347 pr_info("%-15s %08x\n", reg_name
[i
], regs_buff
[i
]);
3351 * e1000_dump: Print registers, tx ring and rx ring
3353 static void e1000_dump(struct e1000_adapter
*adapter
)
3355 /* this code doesn't handle multiple rings */
3356 struct e1000_tx_ring
*tx_ring
= adapter
->tx_ring
;
3357 struct e1000_rx_ring
*rx_ring
= adapter
->rx_ring
;
3360 if (!netif_msg_hw(adapter
))
3363 /* Print Registers */
3364 e1000_regdump(adapter
);
3369 pr_info("TX Desc ring0 dump\n");
3371 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
3373 * Legacy Transmit Descriptor
3374 * +--------------------------------------------------------------+
3375 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
3376 * +--------------------------------------------------------------+
3377 * 8 | Special | CSS | Status | CMD | CSO | Length |
3378 * +--------------------------------------------------------------+
3379 * 63 48 47 36 35 32 31 24 23 16 15 0
3381 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
3382 * 63 48 47 40 39 32 31 16 15 8 7 0
3383 * +----------------------------------------------------------------+
3384 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
3385 * +----------------------------------------------------------------+
3386 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
3387 * +----------------------------------------------------------------+
3388 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3390 * Extended Data Descriptor (DTYP=0x1)
3391 * +----------------------------------------------------------------+
3392 * 0 | Buffer Address [63:0] |
3393 * +----------------------------------------------------------------+
3394 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
3395 * +----------------------------------------------------------------+
3396 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
3398 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n");
3399 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n");
3401 if (!netif_msg_tx_done(adapter
))
3402 goto rx_ring_summary
;
3404 for (i
= 0; tx_ring
->desc
&& (i
< tx_ring
->count
); i
++) {
3405 struct e1000_tx_desc
*tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3406 struct e1000_buffer
*buffer_info
= &tx_ring
->buffer_info
[i
];
3407 struct my_u
{ __le64 a
; __le64 b
; };
3408 struct my_u
*u
= (struct my_u
*)tx_desc
;
3411 if (i
== tx_ring
->next_to_use
&& i
== tx_ring
->next_to_clean
)
3413 else if (i
== tx_ring
->next_to_use
)
3415 else if (i
== tx_ring
->next_to_clean
)
3420 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n",
3421 ((le64_to_cpu(u
->b
) & (1<<20)) ? 'd' : 'c'), i
,
3422 le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3423 (u64
)buffer_info
->dma
, buffer_info
->length
,
3424 buffer_info
->next_to_watch
,
3425 (u64
)buffer_info
->time_stamp
, buffer_info
->skb
, type
);
3432 pr_info("\nRX Desc ring dump\n");
3434 /* Legacy Receive Descriptor Format
3436 * +-----------------------------------------------------+
3437 * | Buffer Address [63:0] |
3438 * +-----------------------------------------------------+
3439 * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
3440 * +-----------------------------------------------------+
3441 * 63 48 47 40 39 32 31 16 15 0
3443 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n");
3445 if (!netif_msg_rx_status(adapter
))
3448 for (i
= 0; rx_ring
->desc
&& (i
< rx_ring
->count
); i
++) {
3449 struct e1000_rx_desc
*rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
3450 struct e1000_buffer
*buffer_info
= &rx_ring
->buffer_info
[i
];
3451 struct my_u
{ __le64 a
; __le64 b
; };
3452 struct my_u
*u
= (struct my_u
*)rx_desc
;
3455 if (i
== rx_ring
->next_to_use
)
3457 else if (i
== rx_ring
->next_to_clean
)
3462 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n",
3463 i
, le64_to_cpu(u
->a
), le64_to_cpu(u
->b
),
3464 (u64
)buffer_info
->dma
, buffer_info
->skb
, type
);
3467 /* dump the descriptor caches */
3469 pr_info("Rx descriptor cache in 64bit format\n");
3470 for (i
= 0x6000; i
<= 0x63FF ; i
+= 0x10) {
3471 pr_info("R%04X: %08X|%08X %08X|%08X\n",
3473 readl(adapter
->hw
.hw_addr
+ i
+4),
3474 readl(adapter
->hw
.hw_addr
+ i
),
3475 readl(adapter
->hw
.hw_addr
+ i
+12),
3476 readl(adapter
->hw
.hw_addr
+ i
+8));
3479 pr_info("Tx descriptor cache in 64bit format\n");
3480 for (i
= 0x7000; i
<= 0x73FF ; i
+= 0x10) {
3481 pr_info("T%04X: %08X|%08X %08X|%08X\n",
3483 readl(adapter
->hw
.hw_addr
+ i
+4),
3484 readl(adapter
->hw
.hw_addr
+ i
),
3485 readl(adapter
->hw
.hw_addr
+ i
+12),
3486 readl(adapter
->hw
.hw_addr
+ i
+8));
3493 * e1000_tx_timeout - Respond to a Tx Hang
3494 * @netdev: network interface device structure
3497 static void e1000_tx_timeout(struct net_device
*netdev
)
3499 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3501 /* Do the reset outside of interrupt context */
3502 adapter
->tx_timeout_count
++;
3503 schedule_work(&adapter
->reset_task
);
3506 static void e1000_reset_task(struct work_struct
*work
)
3508 struct e1000_adapter
*adapter
=
3509 container_of(work
, struct e1000_adapter
, reset_task
);
3511 if (test_bit(__E1000_DOWN
, &adapter
->flags
))
3513 e_err(drv
, "Reset adapter\n");
3514 e1000_reinit_safe(adapter
);
3518 * e1000_get_stats - Get System Network Statistics
3519 * @netdev: network interface device structure
3521 * Returns the address of the device statistics structure.
3522 * The statistics are actually updated from the watchdog.
3525 static struct net_device_stats
*e1000_get_stats(struct net_device
*netdev
)
3527 /* only return the current stats */
3528 return &netdev
->stats
;
3532 * e1000_change_mtu - Change the Maximum Transfer Unit
3533 * @netdev: network interface device structure
3534 * @new_mtu: new value for maximum frame size
3536 * Returns 0 on success, negative on failure
3539 static int e1000_change_mtu(struct net_device
*netdev
, int new_mtu
)
3541 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3542 struct e1000_hw
*hw
= &adapter
->hw
;
3543 int max_frame
= new_mtu
+ ENET_HEADER_SIZE
+ ETHERNET_FCS_SIZE
;
3545 if ((max_frame
< MINIMUM_ETHERNET_FRAME_SIZE
) ||
3546 (max_frame
> MAX_JUMBO_FRAME_SIZE
)) {
3547 e_err(probe
, "Invalid MTU setting\n");
3551 /* Adapter-specific max frame size limits. */
3552 switch (hw
->mac_type
) {
3553 case e1000_undefined
... e1000_82542_rev2_1
:
3554 if (max_frame
> (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) {
3555 e_err(probe
, "Jumbo Frames not supported.\n");
3560 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */
3564 while (test_and_set_bit(__E1000_RESETTING
, &adapter
->flags
))
3566 /* e1000_down has a dependency on max_frame_size */
3567 hw
->max_frame_size
= max_frame
;
3568 if (netif_running(netdev
))
3569 e1000_down(adapter
);
3571 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3572 * means we reserve 2 more, this pushes us to allocate from the next
3574 * i.e. RXBUFFER_2048 --> size-4096 slab
3575 * however with the new *_jumbo_rx* routines, jumbo receives will use
3576 * fragmented skbs */
3578 if (max_frame
<= E1000_RXBUFFER_2048
)
3579 adapter
->rx_buffer_len
= E1000_RXBUFFER_2048
;
3581 #if (PAGE_SIZE >= E1000_RXBUFFER_16384)
3582 adapter
->rx_buffer_len
= E1000_RXBUFFER_16384
;
3583 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096)
3584 adapter
->rx_buffer_len
= PAGE_SIZE
;
3587 /* adjust allocation if LPE protects us, and we aren't using SBP */
3588 if (!hw
->tbi_compatibility_on
&&
3589 ((max_frame
== (ETH_FRAME_LEN
+ ETH_FCS_LEN
)) ||
3590 (max_frame
== MAXIMUM_ETHERNET_VLAN_SIZE
)))
3591 adapter
->rx_buffer_len
= MAXIMUM_ETHERNET_VLAN_SIZE
;
3593 pr_info("%s changing MTU from %d to %d\n",
3594 netdev
->name
, netdev
->mtu
, new_mtu
);
3595 netdev
->mtu
= new_mtu
;
3597 if (netif_running(netdev
))
3600 e1000_reset(adapter
);
3602 clear_bit(__E1000_RESETTING
, &adapter
->flags
);
3608 * e1000_update_stats - Update the board statistics counters
3609 * @adapter: board private structure
3612 void e1000_update_stats(struct e1000_adapter
*adapter
)
3614 struct net_device
*netdev
= adapter
->netdev
;
3615 struct e1000_hw
*hw
= &adapter
->hw
;
3616 struct pci_dev
*pdev
= adapter
->pdev
;
3617 unsigned long flags
;
3620 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
3623 * Prevent stats update while adapter is being reset, or if the pci
3624 * connection is down.
3626 if (adapter
->link_speed
== 0)
3628 if (pci_channel_offline(pdev
))
3631 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
3633 /* these counters are modified from e1000_tbi_adjust_stats,
3634 * called from the interrupt context, so they must only
3635 * be written while holding adapter->stats_lock
3638 adapter
->stats
.crcerrs
+= er32(CRCERRS
);
3639 adapter
->stats
.gprc
+= er32(GPRC
);
3640 adapter
->stats
.gorcl
+= er32(GORCL
);
3641 adapter
->stats
.gorch
+= er32(GORCH
);
3642 adapter
->stats
.bprc
+= er32(BPRC
);
3643 adapter
->stats
.mprc
+= er32(MPRC
);
3644 adapter
->stats
.roc
+= er32(ROC
);
3646 adapter
->stats
.prc64
+= er32(PRC64
);
3647 adapter
->stats
.prc127
+= er32(PRC127
);
3648 adapter
->stats
.prc255
+= er32(PRC255
);
3649 adapter
->stats
.prc511
+= er32(PRC511
);
3650 adapter
->stats
.prc1023
+= er32(PRC1023
);
3651 adapter
->stats
.prc1522
+= er32(PRC1522
);
3653 adapter
->stats
.symerrs
+= er32(SYMERRS
);
3654 adapter
->stats
.mpc
+= er32(MPC
);
3655 adapter
->stats
.scc
+= er32(SCC
);
3656 adapter
->stats
.ecol
+= er32(ECOL
);
3657 adapter
->stats
.mcc
+= er32(MCC
);
3658 adapter
->stats
.latecol
+= er32(LATECOL
);
3659 adapter
->stats
.dc
+= er32(DC
);
3660 adapter
->stats
.sec
+= er32(SEC
);
3661 adapter
->stats
.rlec
+= er32(RLEC
);
3662 adapter
->stats
.xonrxc
+= er32(XONRXC
);
3663 adapter
->stats
.xontxc
+= er32(XONTXC
);
3664 adapter
->stats
.xoffrxc
+= er32(XOFFRXC
);
3665 adapter
->stats
.xofftxc
+= er32(XOFFTXC
);
3666 adapter
->stats
.fcruc
+= er32(FCRUC
);
3667 adapter
->stats
.gptc
+= er32(GPTC
);
3668 adapter
->stats
.gotcl
+= er32(GOTCL
);
3669 adapter
->stats
.gotch
+= er32(GOTCH
);
3670 adapter
->stats
.rnbc
+= er32(RNBC
);
3671 adapter
->stats
.ruc
+= er32(RUC
);
3672 adapter
->stats
.rfc
+= er32(RFC
);
3673 adapter
->stats
.rjc
+= er32(RJC
);
3674 adapter
->stats
.torl
+= er32(TORL
);
3675 adapter
->stats
.torh
+= er32(TORH
);
3676 adapter
->stats
.totl
+= er32(TOTL
);
3677 adapter
->stats
.toth
+= er32(TOTH
);
3678 adapter
->stats
.tpr
+= er32(TPR
);
3680 adapter
->stats
.ptc64
+= er32(PTC64
);
3681 adapter
->stats
.ptc127
+= er32(PTC127
);
3682 adapter
->stats
.ptc255
+= er32(PTC255
);
3683 adapter
->stats
.ptc511
+= er32(PTC511
);
3684 adapter
->stats
.ptc1023
+= er32(PTC1023
);
3685 adapter
->stats
.ptc1522
+= er32(PTC1522
);
3687 adapter
->stats
.mptc
+= er32(MPTC
);
3688 adapter
->stats
.bptc
+= er32(BPTC
);
3690 /* used for adaptive IFS */
3692 hw
->tx_packet_delta
= er32(TPT
);
3693 adapter
->stats
.tpt
+= hw
->tx_packet_delta
;
3694 hw
->collision_delta
= er32(COLC
);
3695 adapter
->stats
.colc
+= hw
->collision_delta
;
3697 if (hw
->mac_type
>= e1000_82543
) {
3698 adapter
->stats
.algnerrc
+= er32(ALGNERRC
);
3699 adapter
->stats
.rxerrc
+= er32(RXERRC
);
3700 adapter
->stats
.tncrs
+= er32(TNCRS
);
3701 adapter
->stats
.cexterr
+= er32(CEXTERR
);
3702 adapter
->stats
.tsctc
+= er32(TSCTC
);
3703 adapter
->stats
.tsctfc
+= er32(TSCTFC
);
3706 /* Fill out the OS statistics structure */
3707 netdev
->stats
.multicast
= adapter
->stats
.mprc
;
3708 netdev
->stats
.collisions
= adapter
->stats
.colc
;
3712 /* RLEC on some newer hardware can be incorrect so build
3713 * our own version based on RUC and ROC */
3714 netdev
->stats
.rx_errors
= adapter
->stats
.rxerrc
+
3715 adapter
->stats
.crcerrs
+ adapter
->stats
.algnerrc
+
3716 adapter
->stats
.ruc
+ adapter
->stats
.roc
+
3717 adapter
->stats
.cexterr
;
3718 adapter
->stats
.rlerrc
= adapter
->stats
.ruc
+ adapter
->stats
.roc
;
3719 netdev
->stats
.rx_length_errors
= adapter
->stats
.rlerrc
;
3720 netdev
->stats
.rx_crc_errors
= adapter
->stats
.crcerrs
;
3721 netdev
->stats
.rx_frame_errors
= adapter
->stats
.algnerrc
;
3722 netdev
->stats
.rx_missed_errors
= adapter
->stats
.mpc
;
3725 adapter
->stats
.txerrc
= adapter
->stats
.ecol
+ adapter
->stats
.latecol
;
3726 netdev
->stats
.tx_errors
= adapter
->stats
.txerrc
;
3727 netdev
->stats
.tx_aborted_errors
= adapter
->stats
.ecol
;
3728 netdev
->stats
.tx_window_errors
= adapter
->stats
.latecol
;
3729 netdev
->stats
.tx_carrier_errors
= adapter
->stats
.tncrs
;
3730 if (hw
->bad_tx_carr_stats_fd
&&
3731 adapter
->link_duplex
== FULL_DUPLEX
) {
3732 netdev
->stats
.tx_carrier_errors
= 0;
3733 adapter
->stats
.tncrs
= 0;
3736 /* Tx Dropped needs to be maintained elsewhere */
3739 if (hw
->media_type
== e1000_media_type_copper
) {
3740 if ((adapter
->link_speed
== SPEED_1000
) &&
3741 (!e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_tmp
))) {
3742 phy_tmp
&= PHY_IDLE_ERROR_COUNT_MASK
;
3743 adapter
->phy_stats
.idle_errors
+= phy_tmp
;
3746 if ((hw
->mac_type
<= e1000_82546
) &&
3747 (hw
->phy_type
== e1000_phy_m88
) &&
3748 !e1000_read_phy_reg(hw
, M88E1000_RX_ERR_CNTR
, &phy_tmp
))
3749 adapter
->phy_stats
.receive_errors
+= phy_tmp
;
3752 /* Management Stats */
3753 if (hw
->has_smbus
) {
3754 adapter
->stats
.mgptc
+= er32(MGTPTC
);
3755 adapter
->stats
.mgprc
+= er32(MGTPRC
);
3756 adapter
->stats
.mgpdc
+= er32(MGTPDC
);
3759 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
3763 * e1000_intr - Interrupt Handler
3764 * @irq: interrupt number
3765 * @data: pointer to a network interface device structure
3768 static irqreturn_t
e1000_intr(int irq
, void *data
)
3770 struct net_device
*netdev
= data
;
3771 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
3772 struct e1000_hw
*hw
= &adapter
->hw
;
3773 u32 icr
= er32(ICR
);
3775 if (unlikely((!icr
)))
3776 return IRQ_NONE
; /* Not our interrupt */
3779 * we might have caused the interrupt, but the above
3780 * read cleared it, and just in case the driver is
3781 * down there is nothing to do so return handled
3783 if (unlikely(test_bit(__E1000_DOWN
, &adapter
->flags
)))
3786 if (unlikely(icr
& (E1000_ICR_RXSEQ
| E1000_ICR_LSC
))) {
3787 hw
->get_link_status
= 1;
3788 /* guard against interrupt when we're going down */
3789 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3790 schedule_delayed_work(&adapter
->watchdog_task
, 1);
3793 /* disable interrupts, without the synchronize_irq bit */
3795 E1000_WRITE_FLUSH();
3797 if (likely(napi_schedule_prep(&adapter
->napi
))) {
3798 adapter
->total_tx_bytes
= 0;
3799 adapter
->total_tx_packets
= 0;
3800 adapter
->total_rx_bytes
= 0;
3801 adapter
->total_rx_packets
= 0;
3802 __napi_schedule(&adapter
->napi
);
3804 /* this really should not happen! if it does it is basically a
3805 * bug, but not a hard error, so enable ints and continue */
3806 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3807 e1000_irq_enable(adapter
);
3814 * e1000_clean - NAPI Rx polling callback
3815 * @adapter: board private structure
3817 static int e1000_clean(struct napi_struct
*napi
, int budget
)
3819 struct e1000_adapter
*adapter
= container_of(napi
, struct e1000_adapter
, napi
);
3820 int tx_clean_complete
= 0, work_done
= 0;
3822 tx_clean_complete
= e1000_clean_tx_irq(adapter
, &adapter
->tx_ring
[0]);
3824 adapter
->clean_rx(adapter
, &adapter
->rx_ring
[0], &work_done
, budget
);
3826 if (!tx_clean_complete
)
3829 /* If budget not fully consumed, exit the polling mode */
3830 if (work_done
< budget
) {
3831 if (likely(adapter
->itr_setting
& 3))
3832 e1000_set_itr(adapter
);
3833 napi_complete(napi
);
3834 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
3835 e1000_irq_enable(adapter
);
3842 * e1000_clean_tx_irq - Reclaim resources after transmit completes
3843 * @adapter: board private structure
3845 static bool e1000_clean_tx_irq(struct e1000_adapter
*adapter
,
3846 struct e1000_tx_ring
*tx_ring
)
3848 struct e1000_hw
*hw
= &adapter
->hw
;
3849 struct net_device
*netdev
= adapter
->netdev
;
3850 struct e1000_tx_desc
*tx_desc
, *eop_desc
;
3851 struct e1000_buffer
*buffer_info
;
3852 unsigned int i
, eop
;
3853 unsigned int count
= 0;
3854 unsigned int total_tx_bytes
=0, total_tx_packets
=0;
3856 i
= tx_ring
->next_to_clean
;
3857 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3858 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3860 while ((eop_desc
->upper
.data
& cpu_to_le32(E1000_TXD_STAT_DD
)) &&
3861 (count
< tx_ring
->count
)) {
3862 bool cleaned
= false;
3863 rmb(); /* read buffer_info after eop_desc */
3864 for ( ; !cleaned
; count
++) {
3865 tx_desc
= E1000_TX_DESC(*tx_ring
, i
);
3866 buffer_info
= &tx_ring
->buffer_info
[i
];
3867 cleaned
= (i
== eop
);
3870 total_tx_packets
+= buffer_info
->segs
;
3871 total_tx_bytes
+= buffer_info
->bytecount
;
3873 e1000_unmap_and_free_tx_resource(adapter
, buffer_info
);
3874 tx_desc
->upper
.data
= 0;
3876 if (unlikely(++i
== tx_ring
->count
)) i
= 0;
3879 eop
= tx_ring
->buffer_info
[i
].next_to_watch
;
3880 eop_desc
= E1000_TX_DESC(*tx_ring
, eop
);
3883 tx_ring
->next_to_clean
= i
;
3885 #define TX_WAKE_THRESHOLD 32
3886 if (unlikely(count
&& netif_carrier_ok(netdev
) &&
3887 E1000_DESC_UNUSED(tx_ring
) >= TX_WAKE_THRESHOLD
)) {
3888 /* Make sure that anybody stopping the queue after this
3889 * sees the new next_to_clean.
3893 if (netif_queue_stopped(netdev
) &&
3894 !(test_bit(__E1000_DOWN
, &adapter
->flags
))) {
3895 netif_wake_queue(netdev
);
3896 ++adapter
->restart_queue
;
3900 if (adapter
->detect_tx_hung
) {
3901 /* Detect a transmit hang in hardware, this serializes the
3902 * check with the clearing of time_stamp and movement of i */
3903 adapter
->detect_tx_hung
= false;
3904 if (tx_ring
->buffer_info
[eop
].time_stamp
&&
3905 time_after(jiffies
, tx_ring
->buffer_info
[eop
].time_stamp
+
3906 (adapter
->tx_timeout_factor
* HZ
)) &&
3907 !(er32(STATUS
) & E1000_STATUS_TXOFF
)) {
3909 /* detected Tx unit hang */
3910 e_err(drv
, "Detected Tx Unit Hang\n"
3914 " next_to_use <%x>\n"
3915 " next_to_clean <%x>\n"
3916 "buffer_info[next_to_clean]\n"
3917 " time_stamp <%lx>\n"
3918 " next_to_watch <%x>\n"
3920 " next_to_watch.status <%x>\n",
3921 (unsigned long)((tx_ring
- adapter
->tx_ring
) /
3922 sizeof(struct e1000_tx_ring
)),
3923 readl(hw
->hw_addr
+ tx_ring
->tdh
),
3924 readl(hw
->hw_addr
+ tx_ring
->tdt
),
3925 tx_ring
->next_to_use
,
3926 tx_ring
->next_to_clean
,
3927 tx_ring
->buffer_info
[eop
].time_stamp
,
3930 eop_desc
->upper
.fields
.status
);
3931 e1000_dump(adapter
);
3932 netif_stop_queue(netdev
);
3935 adapter
->total_tx_bytes
+= total_tx_bytes
;
3936 adapter
->total_tx_packets
+= total_tx_packets
;
3937 netdev
->stats
.tx_bytes
+= total_tx_bytes
;
3938 netdev
->stats
.tx_packets
+= total_tx_packets
;
3939 return count
< tx_ring
->count
;
3943 * e1000_rx_checksum - Receive Checksum Offload for 82543
3944 * @adapter: board private structure
3945 * @status_err: receive descriptor status and error fields
3946 * @csum: receive descriptor csum field
3947 * @sk_buff: socket buffer with received data
3950 static void e1000_rx_checksum(struct e1000_adapter
*adapter
, u32 status_err
,
3951 u32 csum
, struct sk_buff
*skb
)
3953 struct e1000_hw
*hw
= &adapter
->hw
;
3954 u16 status
= (u16
)status_err
;
3955 u8 errors
= (u8
)(status_err
>> 24);
3957 skb_checksum_none_assert(skb
);
3959 /* 82543 or newer only */
3960 if (unlikely(hw
->mac_type
< e1000_82543
)) return;
3961 /* Ignore Checksum bit is set */
3962 if (unlikely(status
& E1000_RXD_STAT_IXSM
)) return;
3963 /* TCP/UDP checksum error bit is set */
3964 if (unlikely(errors
& E1000_RXD_ERR_TCPE
)) {
3965 /* let the stack verify checksum errors */
3966 adapter
->hw_csum_err
++;
3969 /* TCP/UDP Checksum has not been calculated */
3970 if (!(status
& E1000_RXD_STAT_TCPCS
))
3973 /* It must be a TCP or UDP packet with a valid checksum */
3974 if (likely(status
& E1000_RXD_STAT_TCPCS
)) {
3975 /* TCP checksum is good */
3976 skb
->ip_summed
= CHECKSUM_UNNECESSARY
;
3978 adapter
->hw_csum_good
++;
3982 * e1000_consume_page - helper function
3984 static void e1000_consume_page(struct e1000_buffer
*bi
, struct sk_buff
*skb
,
3989 skb
->data_len
+= length
;
3990 skb
->truesize
+= PAGE_SIZE
;
3994 * e1000_receive_skb - helper function to handle rx indications
3995 * @adapter: board private structure
3996 * @status: descriptor status field as written by hardware
3997 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
3998 * @skb: pointer to sk_buff to be indicated to stack
4000 static void e1000_receive_skb(struct e1000_adapter
*adapter
, u8 status
,
4001 __le16 vlan
, struct sk_buff
*skb
)
4003 skb
->protocol
= eth_type_trans(skb
, adapter
->netdev
);
4005 if (status
& E1000_RXD_STAT_VP
) {
4006 u16 vid
= le16_to_cpu(vlan
) & E1000_RXD_SPC_VLAN_MASK
;
4008 __vlan_hwaccel_put_tag(skb
, vid
);
4010 napi_gro_receive(&adapter
->napi
, skb
);
4014 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
4015 * @adapter: board private structure
4016 * @rx_ring: ring to clean
4017 * @work_done: amount of napi work completed this call
4018 * @work_to_do: max amount of work allowed for this call to do
4020 * the return value indicates whether actual cleaning was done, there
4021 * is no guarantee that everything was cleaned
4023 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter
*adapter
,
4024 struct e1000_rx_ring
*rx_ring
,
4025 int *work_done
, int work_to_do
)
4027 struct e1000_hw
*hw
= &adapter
->hw
;
4028 struct net_device
*netdev
= adapter
->netdev
;
4029 struct pci_dev
*pdev
= adapter
->pdev
;
4030 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4031 struct e1000_buffer
*buffer_info
, *next_buffer
;
4032 unsigned long irq_flags
;
4035 int cleaned_count
= 0;
4036 bool cleaned
= false;
4037 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4039 i
= rx_ring
->next_to_clean
;
4040 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4041 buffer_info
= &rx_ring
->buffer_info
[i
];
4043 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4044 struct sk_buff
*skb
;
4047 if (*work_done
>= work_to_do
)
4050 rmb(); /* read descriptor and rx_buffer_info after status DD */
4052 status
= rx_desc
->status
;
4053 skb
= buffer_info
->skb
;
4054 buffer_info
->skb
= NULL
;
4056 if (++i
== rx_ring
->count
) i
= 0;
4057 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4060 next_buffer
= &rx_ring
->buffer_info
[i
];
4064 dma_unmap_page(&pdev
->dev
, buffer_info
->dma
,
4065 buffer_info
->length
, DMA_FROM_DEVICE
);
4066 buffer_info
->dma
= 0;
4068 length
= le16_to_cpu(rx_desc
->length
);
4070 /* errors is only valid for DD + EOP descriptors */
4071 if (unlikely((status
& E1000_RXD_STAT_EOP
) &&
4072 (rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
))) {
4076 mapped
= page_address(buffer_info
->page
);
4077 last_byte
= *(mapped
+ length
- 1);
4078 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4080 spin_lock_irqsave(&adapter
->stats_lock
,
4082 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4084 spin_unlock_irqrestore(&adapter
->stats_lock
,
4088 if (netdev
->features
& NETIF_F_RXALL
)
4090 /* recycle both page and skb */
4091 buffer_info
->skb
= skb
;
4092 /* an error means any chain goes out the window
4094 if (rx_ring
->rx_skb_top
)
4095 dev_kfree_skb(rx_ring
->rx_skb_top
);
4096 rx_ring
->rx_skb_top
= NULL
;
4101 #define rxtop rx_ring->rx_skb_top
4103 if (!(status
& E1000_RXD_STAT_EOP
)) {
4104 /* this descriptor is only the beginning (or middle) */
4106 /* this is the beginning of a chain */
4108 skb_fill_page_desc(rxtop
, 0, buffer_info
->page
,
4111 /* this is the middle of a chain */
4112 skb_fill_page_desc(rxtop
,
4113 skb_shinfo(rxtop
)->nr_frags
,
4114 buffer_info
->page
, 0, length
);
4115 /* re-use the skb, only consumed the page */
4116 buffer_info
->skb
= skb
;
4118 e1000_consume_page(buffer_info
, rxtop
, length
);
4122 /* end of the chain */
4123 skb_fill_page_desc(rxtop
,
4124 skb_shinfo(rxtop
)->nr_frags
,
4125 buffer_info
->page
, 0, length
);
4126 /* re-use the current skb, we only consumed the
4128 buffer_info
->skb
= skb
;
4131 e1000_consume_page(buffer_info
, skb
, length
);
4133 /* no chain, got EOP, this buf is the packet
4134 * copybreak to save the put_page/alloc_page */
4135 if (length
<= copybreak
&&
4136 skb_tailroom(skb
) >= length
) {
4138 vaddr
= kmap_atomic(buffer_info
->page
);
4139 memcpy(skb_tail_pointer(skb
), vaddr
, length
);
4140 kunmap_atomic(vaddr
);
4141 /* re-use the page, so don't erase
4142 * buffer_info->page */
4143 skb_put(skb
, length
);
4145 skb_fill_page_desc(skb
, 0,
4146 buffer_info
->page
, 0,
4148 e1000_consume_page(buffer_info
, skb
,
4154 /* Receive Checksum Offload XXX recompute due to CRC strip? */
4155 e1000_rx_checksum(adapter
,
4157 ((u32
)(rx_desc
->errors
) << 24),
4158 le16_to_cpu(rx_desc
->csum
), skb
);
4160 total_rx_bytes
+= (skb
->len
- 4); /* don't count FCS */
4161 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4162 pskb_trim(skb
, skb
->len
- 4);
4165 /* eth type trans needs skb->data to point to something */
4166 if (!pskb_may_pull(skb
, ETH_HLEN
)) {
4167 e_err(drv
, "pskb_may_pull failed.\n");
4172 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4175 rx_desc
->status
= 0;
4177 /* return some buffers to hardware, one at a time is too slow */
4178 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4179 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4183 /* use prefetched values */
4185 buffer_info
= next_buffer
;
4187 rx_ring
->next_to_clean
= i
;
4189 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4191 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4193 adapter
->total_rx_packets
+= total_rx_packets
;
4194 adapter
->total_rx_bytes
+= total_rx_bytes
;
4195 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4196 netdev
->stats
.rx_packets
+= total_rx_packets
;
4201 * this should improve performance for small packets with large amounts
4202 * of reassembly being done in the stack
4204 static void e1000_check_copybreak(struct net_device
*netdev
,
4205 struct e1000_buffer
*buffer_info
,
4206 u32 length
, struct sk_buff
**skb
)
4208 struct sk_buff
*new_skb
;
4210 if (length
> copybreak
)
4213 new_skb
= netdev_alloc_skb_ip_align(netdev
, length
);
4217 skb_copy_to_linear_data_offset(new_skb
, -NET_IP_ALIGN
,
4218 (*skb
)->data
- NET_IP_ALIGN
,
4219 length
+ NET_IP_ALIGN
);
4220 /* save the skb in buffer_info as good */
4221 buffer_info
->skb
= *skb
;
4226 * e1000_clean_rx_irq - Send received data up the network stack; legacy
4227 * @adapter: board private structure
4228 * @rx_ring: ring to clean
4229 * @work_done: amount of napi work completed this call
4230 * @work_to_do: max amount of work allowed for this call to do
4232 static bool e1000_clean_rx_irq(struct e1000_adapter
*adapter
,
4233 struct e1000_rx_ring
*rx_ring
,
4234 int *work_done
, int work_to_do
)
4236 struct e1000_hw
*hw
= &adapter
->hw
;
4237 struct net_device
*netdev
= adapter
->netdev
;
4238 struct pci_dev
*pdev
= adapter
->pdev
;
4239 struct e1000_rx_desc
*rx_desc
, *next_rxd
;
4240 struct e1000_buffer
*buffer_info
, *next_buffer
;
4241 unsigned long flags
;
4244 int cleaned_count
= 0;
4245 bool cleaned
= false;
4246 unsigned int total_rx_bytes
=0, total_rx_packets
=0;
4248 i
= rx_ring
->next_to_clean
;
4249 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4250 buffer_info
= &rx_ring
->buffer_info
[i
];
4252 while (rx_desc
->status
& E1000_RXD_STAT_DD
) {
4253 struct sk_buff
*skb
;
4256 if (*work_done
>= work_to_do
)
4259 rmb(); /* read descriptor and rx_buffer_info after status DD */
4261 status
= rx_desc
->status
;
4262 skb
= buffer_info
->skb
;
4263 buffer_info
->skb
= NULL
;
4265 prefetch(skb
->data
- NET_IP_ALIGN
);
4267 if (++i
== rx_ring
->count
) i
= 0;
4268 next_rxd
= E1000_RX_DESC(*rx_ring
, i
);
4271 next_buffer
= &rx_ring
->buffer_info
[i
];
4275 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4276 buffer_info
->length
, DMA_FROM_DEVICE
);
4277 buffer_info
->dma
= 0;
4279 length
= le16_to_cpu(rx_desc
->length
);
4280 /* !EOP means multiple descriptors were used to store a single
4281 * packet, if thats the case we need to toss it. In fact, we
4282 * to toss every packet with the EOP bit clear and the next
4283 * frame that _does_ have the EOP bit set, as it is by
4284 * definition only a frame fragment
4286 if (unlikely(!(status
& E1000_RXD_STAT_EOP
)))
4287 adapter
->discarding
= true;
4289 if (adapter
->discarding
) {
4290 /* All receives must fit into a single buffer */
4291 e_dbg("Receive packet consumed multiple buffers\n");
4293 buffer_info
->skb
= skb
;
4294 if (status
& E1000_RXD_STAT_EOP
)
4295 adapter
->discarding
= false;
4299 if (unlikely(rx_desc
->errors
& E1000_RXD_ERR_FRAME_ERR_MASK
)) {
4300 u8 last_byte
= *(skb
->data
+ length
- 1);
4301 if (TBI_ACCEPT(hw
, status
, rx_desc
->errors
, length
,
4303 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4304 e1000_tbi_adjust_stats(hw
, &adapter
->stats
,
4306 spin_unlock_irqrestore(&adapter
->stats_lock
,
4310 if (netdev
->features
& NETIF_F_RXALL
)
4313 buffer_info
->skb
= skb
;
4319 total_rx_bytes
+= (length
- 4); /* don't count FCS */
4322 if (likely(!(netdev
->features
& NETIF_F_RXFCS
)))
4323 /* adjust length to remove Ethernet CRC, this must be
4324 * done after the TBI_ACCEPT workaround above
4328 e1000_check_copybreak(netdev
, buffer_info
, length
, &skb
);
4330 skb_put(skb
, length
);
4332 /* Receive Checksum Offload */
4333 e1000_rx_checksum(adapter
,
4335 ((u32
)(rx_desc
->errors
) << 24),
4336 le16_to_cpu(rx_desc
->csum
), skb
);
4338 e1000_receive_skb(adapter
, status
, rx_desc
->special
, skb
);
4341 rx_desc
->status
= 0;
4343 /* return some buffers to hardware, one at a time is too slow */
4344 if (unlikely(cleaned_count
>= E1000_RX_BUFFER_WRITE
)) {
4345 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4349 /* use prefetched values */
4351 buffer_info
= next_buffer
;
4353 rx_ring
->next_to_clean
= i
;
4355 cleaned_count
= E1000_DESC_UNUSED(rx_ring
);
4357 adapter
->alloc_rx_buf(adapter
, rx_ring
, cleaned_count
);
4359 adapter
->total_rx_packets
+= total_rx_packets
;
4360 adapter
->total_rx_bytes
+= total_rx_bytes
;
4361 netdev
->stats
.rx_bytes
+= total_rx_bytes
;
4362 netdev
->stats
.rx_packets
+= total_rx_packets
;
4367 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
4368 * @adapter: address of board private structure
4369 * @rx_ring: pointer to receive ring structure
4370 * @cleaned_count: number of buffers to allocate this pass
4374 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter
*adapter
,
4375 struct e1000_rx_ring
*rx_ring
, int cleaned_count
)
4377 struct net_device
*netdev
= adapter
->netdev
;
4378 struct pci_dev
*pdev
= adapter
->pdev
;
4379 struct e1000_rx_desc
*rx_desc
;
4380 struct e1000_buffer
*buffer_info
;
4381 struct sk_buff
*skb
;
4383 unsigned int bufsz
= 256 - 16 /*for skb_reserve */ ;
4385 i
= rx_ring
->next_to_use
;
4386 buffer_info
= &rx_ring
->buffer_info
[i
];
4388 while (cleaned_count
--) {
4389 skb
= buffer_info
->skb
;
4395 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4396 if (unlikely(!skb
)) {
4397 /* Better luck next round */
4398 adapter
->alloc_rx_buff_failed
++;
4402 buffer_info
->skb
= skb
;
4403 buffer_info
->length
= adapter
->rx_buffer_len
;
4405 /* allocate a new page if necessary */
4406 if (!buffer_info
->page
) {
4407 buffer_info
->page
= alloc_page(GFP_ATOMIC
);
4408 if (unlikely(!buffer_info
->page
)) {
4409 adapter
->alloc_rx_buff_failed
++;
4414 if (!buffer_info
->dma
) {
4415 buffer_info
->dma
= dma_map_page(&pdev
->dev
,
4416 buffer_info
->page
, 0,
4417 buffer_info
->length
,
4419 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4420 put_page(buffer_info
->page
);
4422 buffer_info
->page
= NULL
;
4423 buffer_info
->skb
= NULL
;
4424 buffer_info
->dma
= 0;
4425 adapter
->alloc_rx_buff_failed
++;
4426 break; /* while !buffer_info->skb */
4430 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4431 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4433 if (unlikely(++i
== rx_ring
->count
))
4435 buffer_info
= &rx_ring
->buffer_info
[i
];
4438 if (likely(rx_ring
->next_to_use
!= i
)) {
4439 rx_ring
->next_to_use
= i
;
4440 if (unlikely(i
-- == 0))
4441 i
= (rx_ring
->count
- 1);
4443 /* Force memory writes to complete before letting h/w
4444 * know there are new descriptors to fetch. (Only
4445 * applicable for weak-ordered memory model archs,
4446 * such as IA-64). */
4448 writel(i
, adapter
->hw
.hw_addr
+ rx_ring
->rdt
);
4453 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
4454 * @adapter: address of board private structure
4457 static void e1000_alloc_rx_buffers(struct e1000_adapter
*adapter
,
4458 struct e1000_rx_ring
*rx_ring
,
4461 struct e1000_hw
*hw
= &adapter
->hw
;
4462 struct net_device
*netdev
= adapter
->netdev
;
4463 struct pci_dev
*pdev
= adapter
->pdev
;
4464 struct e1000_rx_desc
*rx_desc
;
4465 struct e1000_buffer
*buffer_info
;
4466 struct sk_buff
*skb
;
4468 unsigned int bufsz
= adapter
->rx_buffer_len
;
4470 i
= rx_ring
->next_to_use
;
4471 buffer_info
= &rx_ring
->buffer_info
[i
];
4473 while (cleaned_count
--) {
4474 skb
= buffer_info
->skb
;
4480 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4481 if (unlikely(!skb
)) {
4482 /* Better luck next round */
4483 adapter
->alloc_rx_buff_failed
++;
4487 /* Fix for errata 23, can't cross 64kB boundary */
4488 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4489 struct sk_buff
*oldskb
= skb
;
4490 e_err(rx_err
, "skb align check failed: %u bytes at "
4491 "%p\n", bufsz
, skb
->data
);
4492 /* Try again, without freeing the previous */
4493 skb
= netdev_alloc_skb_ip_align(netdev
, bufsz
);
4494 /* Failed allocation, critical failure */
4496 dev_kfree_skb(oldskb
);
4497 adapter
->alloc_rx_buff_failed
++;
4501 if (!e1000_check_64k_bound(adapter
, skb
->data
, bufsz
)) {
4504 dev_kfree_skb(oldskb
);
4505 adapter
->alloc_rx_buff_failed
++;
4506 break; /* while !buffer_info->skb */
4509 /* Use new allocation */
4510 dev_kfree_skb(oldskb
);
4512 buffer_info
->skb
= skb
;
4513 buffer_info
->length
= adapter
->rx_buffer_len
;
4515 buffer_info
->dma
= dma_map_single(&pdev
->dev
,
4517 buffer_info
->length
,
4519 if (dma_mapping_error(&pdev
->dev
, buffer_info
->dma
)) {
4521 buffer_info
->skb
= NULL
;
4522 buffer_info
->dma
= 0;
4523 adapter
->alloc_rx_buff_failed
++;
4524 break; /* while !buffer_info->skb */
4528 * XXX if it was allocated cleanly it will never map to a
4532 /* Fix for errata 23, can't cross 64kB boundary */
4533 if (!e1000_check_64k_bound(adapter
,
4534 (void *)(unsigned long)buffer_info
->dma
,
4535 adapter
->rx_buffer_len
)) {
4536 e_err(rx_err
, "dma align check failed: %u bytes at "
4537 "%p\n", adapter
->rx_buffer_len
,
4538 (void *)(unsigned long)buffer_info
->dma
);
4540 buffer_info
->skb
= NULL
;
4542 dma_unmap_single(&pdev
->dev
, buffer_info
->dma
,
4543 adapter
->rx_buffer_len
,
4545 buffer_info
->dma
= 0;
4547 adapter
->alloc_rx_buff_failed
++;
4548 break; /* while !buffer_info->skb */
4550 rx_desc
= E1000_RX_DESC(*rx_ring
, i
);
4551 rx_desc
->buffer_addr
= cpu_to_le64(buffer_info
->dma
);
4553 if (unlikely(++i
== rx_ring
->count
))
4555 buffer_info
= &rx_ring
->buffer_info
[i
];
4558 if (likely(rx_ring
->next_to_use
!= i
)) {
4559 rx_ring
->next_to_use
= i
;
4560 if (unlikely(i
-- == 0))
4561 i
= (rx_ring
->count
- 1);
4563 /* Force memory writes to complete before letting h/w
4564 * know there are new descriptors to fetch. (Only
4565 * applicable for weak-ordered memory model archs,
4566 * such as IA-64). */
4568 writel(i
, hw
->hw_addr
+ rx_ring
->rdt
);
4573 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers.
4577 static void e1000_smartspeed(struct e1000_adapter
*adapter
)
4579 struct e1000_hw
*hw
= &adapter
->hw
;
4583 if ((hw
->phy_type
!= e1000_phy_igp
) || !hw
->autoneg
||
4584 !(hw
->autoneg_advertised
& ADVERTISE_1000_FULL
))
4587 if (adapter
->smartspeed
== 0) {
4588 /* If Master/Slave config fault is asserted twice,
4589 * we assume back-to-back */
4590 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4591 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4592 e1000_read_phy_reg(hw
, PHY_1000T_STATUS
, &phy_status
);
4593 if (!(phy_status
& SR_1000T_MS_CONFIG_FAULT
)) return;
4594 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4595 if (phy_ctrl
& CR_1000T_MS_ENABLE
) {
4596 phy_ctrl
&= ~CR_1000T_MS_ENABLE
;
4597 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
,
4599 adapter
->smartspeed
++;
4600 if (!e1000_phy_setup_autoneg(hw
) &&
4601 !e1000_read_phy_reg(hw
, PHY_CTRL
,
4603 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4604 MII_CR_RESTART_AUTO_NEG
);
4605 e1000_write_phy_reg(hw
, PHY_CTRL
,
4610 } else if (adapter
->smartspeed
== E1000_SMARTSPEED_DOWNSHIFT
) {
4611 /* If still no link, perhaps using 2/3 pair cable */
4612 e1000_read_phy_reg(hw
, PHY_1000T_CTRL
, &phy_ctrl
);
4613 phy_ctrl
|= CR_1000T_MS_ENABLE
;
4614 e1000_write_phy_reg(hw
, PHY_1000T_CTRL
, phy_ctrl
);
4615 if (!e1000_phy_setup_autoneg(hw
) &&
4616 !e1000_read_phy_reg(hw
, PHY_CTRL
, &phy_ctrl
)) {
4617 phy_ctrl
|= (MII_CR_AUTO_NEG_EN
|
4618 MII_CR_RESTART_AUTO_NEG
);
4619 e1000_write_phy_reg(hw
, PHY_CTRL
, phy_ctrl
);
4622 /* Restart process after E1000_SMARTSPEED_MAX iterations */
4623 if (adapter
->smartspeed
++ == E1000_SMARTSPEED_MAX
)
4624 adapter
->smartspeed
= 0;
4634 static int e1000_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
, int cmd
)
4640 return e1000_mii_ioctl(netdev
, ifr
, cmd
);
4653 static int e1000_mii_ioctl(struct net_device
*netdev
, struct ifreq
*ifr
,
4656 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4657 struct e1000_hw
*hw
= &adapter
->hw
;
4658 struct mii_ioctl_data
*data
= if_mii(ifr
);
4661 unsigned long flags
;
4663 if (hw
->media_type
!= e1000_media_type_copper
)
4668 data
->phy_id
= hw
->phy_addr
;
4671 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4672 if (e1000_read_phy_reg(hw
, data
->reg_num
& 0x1F,
4674 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4677 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4680 if (data
->reg_num
& ~(0x1F))
4682 mii_reg
= data
->val_in
;
4683 spin_lock_irqsave(&adapter
->stats_lock
, flags
);
4684 if (e1000_write_phy_reg(hw
, data
->reg_num
,
4686 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4689 spin_unlock_irqrestore(&adapter
->stats_lock
, flags
);
4690 if (hw
->media_type
== e1000_media_type_copper
) {
4691 switch (data
->reg_num
) {
4693 if (mii_reg
& MII_CR_POWER_DOWN
)
4695 if (mii_reg
& MII_CR_AUTO_NEG_EN
) {
4697 hw
->autoneg_advertised
= 0x2F;
4702 else if (mii_reg
& 0x2000)
4706 retval
= e1000_set_spd_dplx(
4714 if (netif_running(adapter
->netdev
))
4715 e1000_reinit_locked(adapter
);
4717 e1000_reset(adapter
);
4719 case M88E1000_PHY_SPEC_CTRL
:
4720 case M88E1000_EXT_PHY_SPEC_CTRL
:
4721 if (e1000_phy_reset(hw
))
4726 switch (data
->reg_num
) {
4728 if (mii_reg
& MII_CR_POWER_DOWN
)
4730 if (netif_running(adapter
->netdev
))
4731 e1000_reinit_locked(adapter
);
4733 e1000_reset(adapter
);
4741 return E1000_SUCCESS
;
4744 void e1000_pci_set_mwi(struct e1000_hw
*hw
)
4746 struct e1000_adapter
*adapter
= hw
->back
;
4747 int ret_val
= pci_set_mwi(adapter
->pdev
);
4750 e_err(probe
, "Error in setting MWI\n");
4753 void e1000_pci_clear_mwi(struct e1000_hw
*hw
)
4755 struct e1000_adapter
*adapter
= hw
->back
;
4757 pci_clear_mwi(adapter
->pdev
);
4760 int e1000_pcix_get_mmrbc(struct e1000_hw
*hw
)
4762 struct e1000_adapter
*adapter
= hw
->back
;
4763 return pcix_get_mmrbc(adapter
->pdev
);
4766 void e1000_pcix_set_mmrbc(struct e1000_hw
*hw
, int mmrbc
)
4768 struct e1000_adapter
*adapter
= hw
->back
;
4769 pcix_set_mmrbc(adapter
->pdev
, mmrbc
);
4772 void e1000_io_write(struct e1000_hw
*hw
, unsigned long port
, u32 value
)
4777 static bool e1000_vlan_used(struct e1000_adapter
*adapter
)
4781 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4786 static void __e1000_vlan_mode(struct e1000_adapter
*adapter
,
4787 netdev_features_t features
)
4789 struct e1000_hw
*hw
= &adapter
->hw
;
4793 if (features
& NETIF_F_HW_VLAN_RX
) {
4794 /* enable VLAN tag insert/strip */
4795 ctrl
|= E1000_CTRL_VME
;
4797 /* disable VLAN tag insert/strip */
4798 ctrl
&= ~E1000_CTRL_VME
;
4802 static void e1000_vlan_filter_on_off(struct e1000_adapter
*adapter
,
4805 struct e1000_hw
*hw
= &adapter
->hw
;
4808 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4809 e1000_irq_disable(adapter
);
4811 __e1000_vlan_mode(adapter
, adapter
->netdev
->features
);
4813 /* enable VLAN receive filtering */
4815 rctl
&= ~E1000_RCTL_CFIEN
;
4816 if (!(adapter
->netdev
->flags
& IFF_PROMISC
))
4817 rctl
|= E1000_RCTL_VFE
;
4819 e1000_update_mng_vlan(adapter
);
4821 /* disable VLAN receive filtering */
4823 rctl
&= ~E1000_RCTL_VFE
;
4827 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4828 e1000_irq_enable(adapter
);
4831 static void e1000_vlan_mode(struct net_device
*netdev
,
4832 netdev_features_t features
)
4834 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4836 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4837 e1000_irq_disable(adapter
);
4839 __e1000_vlan_mode(adapter
, features
);
4841 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4842 e1000_irq_enable(adapter
);
4845 static int e1000_vlan_rx_add_vid(struct net_device
*netdev
, u16 vid
)
4847 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4848 struct e1000_hw
*hw
= &adapter
->hw
;
4851 if ((hw
->mng_cookie
.status
&
4852 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT
) &&
4853 (vid
== adapter
->mng_vlan_id
))
4856 if (!e1000_vlan_used(adapter
))
4857 e1000_vlan_filter_on_off(adapter
, true);
4859 /* add VID to filter table */
4860 index
= (vid
>> 5) & 0x7F;
4861 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4862 vfta
|= (1 << (vid
& 0x1F));
4863 e1000_write_vfta(hw
, index
, vfta
);
4865 set_bit(vid
, adapter
->active_vlans
);
4870 static int e1000_vlan_rx_kill_vid(struct net_device
*netdev
, u16 vid
)
4872 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4873 struct e1000_hw
*hw
= &adapter
->hw
;
4876 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4877 e1000_irq_disable(adapter
);
4878 if (!test_bit(__E1000_DOWN
, &adapter
->flags
))
4879 e1000_irq_enable(adapter
);
4881 /* remove VID from filter table */
4882 index
= (vid
>> 5) & 0x7F;
4883 vfta
= E1000_READ_REG_ARRAY(hw
, VFTA
, index
);
4884 vfta
&= ~(1 << (vid
& 0x1F));
4885 e1000_write_vfta(hw
, index
, vfta
);
4887 clear_bit(vid
, adapter
->active_vlans
);
4889 if (!e1000_vlan_used(adapter
))
4890 e1000_vlan_filter_on_off(adapter
, false);
4895 static void e1000_restore_vlan(struct e1000_adapter
*adapter
)
4899 if (!e1000_vlan_used(adapter
))
4902 e1000_vlan_filter_on_off(adapter
, true);
4903 for_each_set_bit(vid
, adapter
->active_vlans
, VLAN_N_VID
)
4904 e1000_vlan_rx_add_vid(adapter
->netdev
, vid
);
4907 int e1000_set_spd_dplx(struct e1000_adapter
*adapter
, u32 spd
, u8 dplx
)
4909 struct e1000_hw
*hw
= &adapter
->hw
;
4913 /* Make sure dplx is at most 1 bit and lsb of speed is not set
4914 * for the switch() below to work */
4915 if ((spd
& 1) || (dplx
& ~1))
4918 /* Fiber NICs only allow 1000 gbps Full duplex */
4919 if ((hw
->media_type
== e1000_media_type_fiber
) &&
4920 spd
!= SPEED_1000
&&
4921 dplx
!= DUPLEX_FULL
)
4924 switch (spd
+ dplx
) {
4925 case SPEED_10
+ DUPLEX_HALF
:
4926 hw
->forced_speed_duplex
= e1000_10_half
;
4928 case SPEED_10
+ DUPLEX_FULL
:
4929 hw
->forced_speed_duplex
= e1000_10_full
;
4931 case SPEED_100
+ DUPLEX_HALF
:
4932 hw
->forced_speed_duplex
= e1000_100_half
;
4934 case SPEED_100
+ DUPLEX_FULL
:
4935 hw
->forced_speed_duplex
= e1000_100_full
;
4937 case SPEED_1000
+ DUPLEX_FULL
:
4939 hw
->autoneg_advertised
= ADVERTISE_1000_FULL
;
4941 case SPEED_1000
+ DUPLEX_HALF
: /* not supported */
4948 e_err(probe
, "Unsupported Speed/Duplex configuration\n");
4952 static int __e1000_shutdown(struct pci_dev
*pdev
, bool *enable_wake
)
4954 struct net_device
*netdev
= pci_get_drvdata(pdev
);
4955 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
4956 struct e1000_hw
*hw
= &adapter
->hw
;
4957 u32 ctrl
, ctrl_ext
, rctl
, status
;
4958 u32 wufc
= adapter
->wol
;
4963 netif_device_detach(netdev
);
4965 if (netif_running(netdev
)) {
4966 WARN_ON(test_bit(__E1000_RESETTING
, &adapter
->flags
));
4967 e1000_down(adapter
);
4971 retval
= pci_save_state(pdev
);
4976 status
= er32(STATUS
);
4977 if (status
& E1000_STATUS_LU
)
4978 wufc
&= ~E1000_WUFC_LNKC
;
4981 e1000_setup_rctl(adapter
);
4982 e1000_set_rx_mode(netdev
);
4986 /* turn on all-multi mode if wake on multicast is enabled */
4987 if (wufc
& E1000_WUFC_MC
)
4988 rctl
|= E1000_RCTL_MPE
;
4990 /* enable receives in the hardware */
4991 ew32(RCTL
, rctl
| E1000_RCTL_EN
);
4993 if (hw
->mac_type
>= e1000_82540
) {
4995 /* advertise wake from D3Cold */
4996 #define E1000_CTRL_ADVD3WUC 0x00100000
4997 /* phy power management enable */
4998 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4999 ctrl
|= E1000_CTRL_ADVD3WUC
|
5000 E1000_CTRL_EN_PHY_PWR_MGMT
;
5004 if (hw
->media_type
== e1000_media_type_fiber
||
5005 hw
->media_type
== e1000_media_type_internal_serdes
) {
5006 /* keep the laser running in D3 */
5007 ctrl_ext
= er32(CTRL_EXT
);
5008 ctrl_ext
|= E1000_CTRL_EXT_SDP7_DATA
;
5009 ew32(CTRL_EXT
, ctrl_ext
);
5012 ew32(WUC
, E1000_WUC_PME_EN
);
5019 e1000_release_manageability(adapter
);
5021 *enable_wake
= !!wufc
;
5023 /* make sure adapter isn't asleep if manageability is enabled */
5024 if (adapter
->en_mng_pt
)
5025 *enable_wake
= true;
5027 if (netif_running(netdev
))
5028 e1000_free_irq(adapter
);
5030 pci_disable_device(pdev
);
5036 static int e1000_suspend(struct pci_dev
*pdev
, pm_message_t state
)
5041 retval
= __e1000_shutdown(pdev
, &wake
);
5046 pci_prepare_to_sleep(pdev
);
5048 pci_wake_from_d3(pdev
, false);
5049 pci_set_power_state(pdev
, PCI_D3hot
);
5055 static int e1000_resume(struct pci_dev
*pdev
)
5057 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5058 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5059 struct e1000_hw
*hw
= &adapter
->hw
;
5062 pci_set_power_state(pdev
, PCI_D0
);
5063 pci_restore_state(pdev
);
5064 pci_save_state(pdev
);
5066 if (adapter
->need_ioport
)
5067 err
= pci_enable_device(pdev
);
5069 err
= pci_enable_device_mem(pdev
);
5071 pr_err("Cannot enable PCI device from suspend\n");
5074 pci_set_master(pdev
);
5076 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5077 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5079 if (netif_running(netdev
)) {
5080 err
= e1000_request_irq(adapter
);
5085 e1000_power_up_phy(adapter
);
5086 e1000_reset(adapter
);
5089 e1000_init_manageability(adapter
);
5091 if (netif_running(netdev
))
5094 netif_device_attach(netdev
);
5100 static void e1000_shutdown(struct pci_dev
*pdev
)
5104 __e1000_shutdown(pdev
, &wake
);
5106 if (system_state
== SYSTEM_POWER_OFF
) {
5107 pci_wake_from_d3(pdev
, wake
);
5108 pci_set_power_state(pdev
, PCI_D3hot
);
5112 #ifdef CONFIG_NET_POLL_CONTROLLER
5114 * Polling 'interrupt' - used by things like netconsole to send skbs
5115 * without having to re-enable interrupts. It's not called while
5116 * the interrupt routine is executing.
5118 static void e1000_netpoll(struct net_device
*netdev
)
5120 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5122 disable_irq(adapter
->pdev
->irq
);
5123 e1000_intr(adapter
->pdev
->irq
, netdev
);
5124 enable_irq(adapter
->pdev
->irq
);
5129 * e1000_io_error_detected - called when PCI error is detected
5130 * @pdev: Pointer to PCI device
5131 * @state: The current pci connection state
5133 * This function is called after a PCI bus error affecting
5134 * this device has been detected.
5136 static pci_ers_result_t
e1000_io_error_detected(struct pci_dev
*pdev
,
5137 pci_channel_state_t state
)
5139 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5140 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5142 netif_device_detach(netdev
);
5144 if (state
== pci_channel_io_perm_failure
)
5145 return PCI_ERS_RESULT_DISCONNECT
;
5147 if (netif_running(netdev
))
5148 e1000_down(adapter
);
5149 pci_disable_device(pdev
);
5151 /* Request a slot slot reset. */
5152 return PCI_ERS_RESULT_NEED_RESET
;
5156 * e1000_io_slot_reset - called after the pci bus has been reset.
5157 * @pdev: Pointer to PCI device
5159 * Restart the card from scratch, as if from a cold-boot. Implementation
5160 * resembles the first-half of the e1000_resume routine.
5162 static pci_ers_result_t
e1000_io_slot_reset(struct pci_dev
*pdev
)
5164 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5165 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5166 struct e1000_hw
*hw
= &adapter
->hw
;
5169 if (adapter
->need_ioport
)
5170 err
= pci_enable_device(pdev
);
5172 err
= pci_enable_device_mem(pdev
);
5174 pr_err("Cannot re-enable PCI device after reset.\n");
5175 return PCI_ERS_RESULT_DISCONNECT
;
5177 pci_set_master(pdev
);
5179 pci_enable_wake(pdev
, PCI_D3hot
, 0);
5180 pci_enable_wake(pdev
, PCI_D3cold
, 0);
5182 e1000_reset(adapter
);
5185 return PCI_ERS_RESULT_RECOVERED
;
5189 * e1000_io_resume - called when traffic can start flowing again.
5190 * @pdev: Pointer to PCI device
5192 * This callback is called when the error recovery driver tells us that
5193 * its OK to resume normal operation. Implementation resembles the
5194 * second-half of the e1000_resume routine.
5196 static void e1000_io_resume(struct pci_dev
*pdev
)
5198 struct net_device
*netdev
= pci_get_drvdata(pdev
);
5199 struct e1000_adapter
*adapter
= netdev_priv(netdev
);
5201 e1000_init_manageability(adapter
);
5203 if (netif_running(netdev
)) {
5204 if (e1000_up(adapter
)) {
5205 pr_info("can't bring device back up after reset\n");
5210 netif_device_attach(netdev
);