1 /*******************************************************************************
3 Intel PRO/1000 Linux driver
4 Copyright(c) 1999 - 2008 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 *******************************************************************************/
29 #include "e1000_api.h"
31 static s32
e1000_validate_mdi_setting_generic(struct e1000_hw
*hw
);
32 static void e1000_set_lan_id_multi_port_pcie(struct e1000_hw
*hw
);
35 * e1000_init_mac_ops_generic - Initialize MAC function pointers
36 * @hw: pointer to the HW structure
38 * Setups up the function pointers to no-op functions
40 void e1000_init_mac_ops_generic(struct e1000_hw
*hw
)
42 struct e1000_mac_info
*mac
= &hw
->mac
;
43 DEBUGFUNC("e1000_init_mac_ops_generic");
46 mac
->ops
.init_params
= e1000_null_ops_generic
;
47 mac
->ops
.init_hw
= e1000_null_ops_generic
;
48 mac
->ops
.reset_hw
= e1000_null_ops_generic
;
49 mac
->ops
.setup_physical_interface
= e1000_null_ops_generic
;
50 mac
->ops
.get_bus_info
= e1000_null_ops_generic
;
51 mac
->ops
.set_lan_id
= e1000_set_lan_id_multi_port_pcie
;
52 mac
->ops
.read_mac_addr
= e1000_read_mac_addr_generic
;
53 mac
->ops
.config_collision_dist
= e1000_config_collision_dist_generic
;
54 mac
->ops
.clear_hw_cntrs
= e1000_null_mac_generic
;
56 mac
->ops
.cleanup_led
= e1000_null_ops_generic
;
57 mac
->ops
.setup_led
= e1000_null_ops_generic
;
58 mac
->ops
.blink_led
= e1000_null_ops_generic
;
59 mac
->ops
.led_on
= e1000_null_ops_generic
;
60 mac
->ops
.led_off
= e1000_null_ops_generic
;
62 mac
->ops
.setup_link
= e1000_null_ops_generic
;
63 mac
->ops
.get_link_up_info
= e1000_null_link_info
;
64 mac
->ops
.check_for_link
= e1000_null_ops_generic
;
65 mac
->ops
.wait_autoneg
= e1000_wait_autoneg_generic
;
67 mac
->ops
.check_mng_mode
= e1000_null_mng_mode
;
68 mac
->ops
.mng_host_if_write
= e1000_mng_host_if_write_generic
;
69 mac
->ops
.mng_write_cmd_header
= e1000_mng_write_cmd_header_generic
;
70 mac
->ops
.mng_enable_host_if
= e1000_mng_enable_host_if_generic
;
72 mac
->ops
.update_mc_addr_list
= e1000_null_update_mc
;
73 mac
->ops
.clear_vfta
= e1000_null_mac_generic
;
74 mac
->ops
.write_vfta
= e1000_null_write_vfta
;
75 mac
->ops
.mta_set
= e1000_null_mta_set
;
76 mac
->ops
.rar_set
= e1000_rar_set_generic
;
77 mac
->ops
.validate_mdi_setting
= e1000_validate_mdi_setting_generic
;
81 * e1000_null_ops_generic - No-op function, returns 0
82 * @hw: pointer to the HW structure
84 s32
e1000_null_ops_generic(struct e1000_hw
*hw
)
86 DEBUGFUNC("e1000_null_ops_generic");
91 * e1000_null_mac_generic - No-op function, return void
92 * @hw: pointer to the HW structure
94 void e1000_null_mac_generic(struct e1000_hw
*hw
)
96 DEBUGFUNC("e1000_null_mac_generic");
101 * e1000_null_link_info - No-op function, return 0
102 * @hw: pointer to the HW structure
104 s32
e1000_null_link_info(struct e1000_hw
*hw
, u16
*s
, u16
*d
)
106 DEBUGFUNC("e1000_null_link_info");
107 return E1000_SUCCESS
;
111 * e1000_null_mng_mode - No-op function, return false
112 * @hw: pointer to the HW structure
114 bool e1000_null_mng_mode(struct e1000_hw
*hw
)
116 DEBUGFUNC("e1000_null_mng_mode");
121 * e1000_null_update_mc - No-op function, return void
122 * @hw: pointer to the HW structure
124 void e1000_null_update_mc(struct e1000_hw
*hw
, u8
*h
, u32 a
)
126 DEBUGFUNC("e1000_null_update_mc");
131 * e1000_null_write_vfta - No-op function, return void
132 * @hw: pointer to the HW structure
134 void e1000_null_write_vfta(struct e1000_hw
*hw
, u32 a
, u32 b
)
136 DEBUGFUNC("e1000_null_write_vfta");
141 * e1000_null_set_mta - No-op function, return void
142 * @hw: pointer to the HW structure
144 void e1000_null_mta_set(struct e1000_hw
*hw
, u32 a
)
146 DEBUGFUNC("e1000_null_mta_set");
151 * e1000_null_rar_set - No-op function, return void
152 * @hw: pointer to the HW structure
154 void e1000_null_rar_set(struct e1000_hw
*hw
, u8
*h
, u32 a
)
156 DEBUGFUNC("e1000_null_rar_set");
161 * e1000_get_bus_info_pci_generic - Get PCI(x) bus information
162 * @hw: pointer to the HW structure
164 * Determines and stores the system bus information for a particular
165 * network interface. The following bus information is determined and stored:
166 * bus speed, bus width, type (PCI/PCIx), and PCI(-x) function.
168 s32
e1000_get_bus_info_pci_generic(struct e1000_hw
*hw
)
170 struct e1000_mac_info
*mac
= &hw
->mac
;
171 struct e1000_bus_info
*bus
= &hw
->bus
;
172 u32 status
= E1000_READ_REG(hw
, E1000_STATUS
);
173 s32 ret_val
= E1000_SUCCESS
;
175 DEBUGFUNC("e1000_get_bus_info_pci_generic");
178 bus
->type
= (status
& E1000_STATUS_PCIX_MODE
)
179 ? e1000_bus_type_pcix
180 : e1000_bus_type_pci
;
183 if (bus
->type
== e1000_bus_type_pci
) {
184 bus
->speed
= (status
& E1000_STATUS_PCI66
)
186 : e1000_bus_speed_33
;
188 switch (status
& E1000_STATUS_PCIX_SPEED
) {
189 case E1000_STATUS_PCIX_SPEED_66
:
190 bus
->speed
= e1000_bus_speed_66
;
192 case E1000_STATUS_PCIX_SPEED_100
:
193 bus
->speed
= e1000_bus_speed_100
;
195 case E1000_STATUS_PCIX_SPEED_133
:
196 bus
->speed
= e1000_bus_speed_133
;
199 bus
->speed
= e1000_bus_speed_reserved
;
205 bus
->width
= (status
& E1000_STATUS_BUS64
)
207 : e1000_bus_width_32
;
209 /* Which PCI(-X) function? */
210 mac
->ops
.set_lan_id(hw
);
216 * e1000_get_bus_info_pcie_generic - Get PCIe bus information
217 * @hw: pointer to the HW structure
219 * Determines and stores the system bus information for a particular
220 * network interface. The following bus information is determined and stored:
221 * bus speed, bus width, type (PCIe), and PCIe function.
223 s32
e1000_get_bus_info_pcie_generic(struct e1000_hw
*hw
)
225 struct e1000_mac_info
*mac
= &hw
->mac
;
226 struct e1000_bus_info
*bus
= &hw
->bus
;
229 u16 pcie_link_status
;
231 DEBUGFUNC("e1000_get_bus_info_pcie_generic");
233 bus
->type
= e1000_bus_type_pci_express
;
234 bus
->speed
= e1000_bus_speed_2500
;
236 ret_val
= e1000_read_pcie_cap_reg(hw
,
240 bus
->width
= e1000_bus_width_unknown
;
242 bus
->width
= (enum e1000_bus_width
)((pcie_link_status
&
243 PCIE_LINK_WIDTH_MASK
) >>
244 PCIE_LINK_WIDTH_SHIFT
);
246 mac
->ops
.set_lan_id(hw
);
248 return E1000_SUCCESS
;
252 * e1000_set_lan_id_multi_port_pcie - Set LAN id for PCIe multiple port devices
254 * @hw: pointer to the HW structure
256 * Determines the LAN function id by reading memory-mapped registers
257 * and swaps the port value if requested.
259 static void e1000_set_lan_id_multi_port_pcie(struct e1000_hw
*hw
)
261 struct e1000_bus_info
*bus
= &hw
->bus
;
265 * The status register reports the correct function number
266 * for the device regardless of function swap state.
268 reg
= E1000_READ_REG(hw
, E1000_STATUS
);
269 bus
->func
= (reg
& E1000_STATUS_FUNC_MASK
) >> E1000_STATUS_FUNC_SHIFT
;
273 * e1000_set_lan_id_multi_port_pci - Set LAN id for PCI multiple port devices
274 * @hw: pointer to the HW structure
276 * Determines the LAN function id by reading PCI config space.
278 void e1000_set_lan_id_multi_port_pci(struct e1000_hw
*hw
)
280 struct e1000_bus_info
*bus
= &hw
->bus
;
284 e1000_read_pci_cfg(hw
, PCI_HEADER_TYPE_REGISTER
, &pci_header_type
);
285 if (pci_header_type
& PCI_HEADER_TYPE_MULTIFUNC
) {
286 status
= E1000_READ_REG(hw
, E1000_STATUS
);
287 bus
->func
= (status
& E1000_STATUS_FUNC_MASK
)
288 >> E1000_STATUS_FUNC_SHIFT
;
295 * e1000_set_lan_id_single_port - Set LAN id for a single port device
296 * @hw: pointer to the HW structure
298 * Sets the LAN function id to zero for a single port device.
300 void e1000_set_lan_id_single_port(struct e1000_hw
*hw
)
302 struct e1000_bus_info
*bus
= &hw
->bus
;
308 * e1000_clear_vfta_generic - Clear VLAN filter table
309 * @hw: pointer to the HW structure
311 * Clears the register array which contains the VLAN filter table by
312 * setting all the values to 0.
314 void e1000_clear_vfta_generic(struct e1000_hw
*hw
)
318 DEBUGFUNC("e1000_clear_vfta_generic");
320 for (offset
= 0; offset
< E1000_VLAN_FILTER_TBL_SIZE
; offset
++) {
321 E1000_WRITE_REG_ARRAY(hw
, E1000_VFTA
, offset
, 0);
322 E1000_WRITE_FLUSH(hw
);
327 * e1000_write_vfta_generic - Write value to VLAN filter table
328 * @hw: pointer to the HW structure
329 * @offset: register offset in VLAN filter table
330 * @value: register value written to VLAN filter table
332 * Writes value at the given offset in the register array which stores
333 * the VLAN filter table.
335 void e1000_write_vfta_generic(struct e1000_hw
*hw
, u32 offset
, u32 value
)
337 DEBUGFUNC("e1000_write_vfta_generic");
339 E1000_WRITE_REG_ARRAY(hw
, E1000_VFTA
, offset
, value
);
340 E1000_WRITE_FLUSH(hw
);
344 * e1000_init_rx_addrs_generic - Initialize receive address's
345 * @hw: pointer to the HW structure
346 * @rar_count: receive address registers
348 * Setups the receive address registers by setting the base receive address
349 * register to the devices MAC address and clearing all the other receive
350 * address registers to 0.
352 void e1000_init_rx_addrs_generic(struct e1000_hw
*hw
, u16 rar_count
)
355 u8 mac_addr
[ETH_ADDR_LEN
] = {0};
357 DEBUGFUNC("e1000_init_rx_addrs_generic");
359 /* Setup the receive address */
360 DEBUGOUT("Programming MAC Address into RAR[0]\n");
362 hw
->mac
.ops
.rar_set(hw
, hw
->mac
.addr
, 0);
364 /* Zero out the other (rar_entry_count - 1) receive addresses */
365 DEBUGOUT1("Clearing RAR[1-%u]\n", rar_count
-1);
366 for (i
= 1; i
< rar_count
; i
++)
367 hw
->mac
.ops
.rar_set(hw
, mac_addr
, i
);
371 * e1000_check_alt_mac_addr_generic - Check for alternate MAC addr
372 * @hw: pointer to the HW structure
374 * Checks the nvm for an alternate MAC address. An alternate MAC address
375 * can be setup by pre-boot software and must be treated like a permanent
376 * address and must override the actual permanent MAC address. If an
377 * alternate MAC address is found it is programmed into RAR0, replacing
378 * the permanent address that was installed into RAR0 by the Si on reset.
379 * This function will return SUCCESS unless it encounters an error while
380 * reading the EEPROM.
382 s32
e1000_check_alt_mac_addr_generic(struct e1000_hw
*hw
)
385 s32 ret_val
= E1000_SUCCESS
;
386 u16 offset
, nvm_alt_mac_addr_offset
, nvm_data
;
387 u8 alt_mac_addr
[ETH_ADDR_LEN
];
389 DEBUGFUNC("e1000_check_alt_mac_addr_generic");
391 ret_val
= hw
->nvm
.ops
.read(hw
, NVM_ALT_MAC_ADDR_PTR
, 1,
392 &nvm_alt_mac_addr_offset
);
394 DEBUGOUT("NVM Read Error\n");
398 if (nvm_alt_mac_addr_offset
== 0xFFFF) {
399 /* There is no Alternate MAC Address */
403 if (hw
->bus
.func
== E1000_FUNC_1
)
404 nvm_alt_mac_addr_offset
+= E1000_ALT_MAC_ADDRESS_OFFSET_LAN1
;
405 for (i
= 0; i
< ETH_ADDR_LEN
; i
+= 2) {
406 offset
= nvm_alt_mac_addr_offset
+ (i
>> 1);
407 ret_val
= hw
->nvm
.ops
.read(hw
, offset
, 1, &nvm_data
);
409 DEBUGOUT("NVM Read Error\n");
413 alt_mac_addr
[i
] = (u8
)(nvm_data
& 0xFF);
414 alt_mac_addr
[i
+ 1] = (u8
)(nvm_data
>> 8);
417 /* if multicast bit is set, the alternate address will not be used */
418 if (alt_mac_addr
[0] & 0x01) {
419 DEBUGOUT("Ignoring Alternate Mac Address with MC bit set\n");
424 * We have a valid alternate MAC address, and we want to treat it the
425 * same as the normal permanent MAC address stored by the HW into the
426 * RAR. Do this by mapping this address into RAR0.
428 hw
->mac
.ops
.rar_set(hw
, alt_mac_addr
, 0);
435 * e1000_rar_set_generic - Set receive address register
436 * @hw: pointer to the HW structure
437 * @addr: pointer to the receive address
438 * @index: receive address array register
440 * Sets the receive address array register at index to the address passed
443 void e1000_rar_set_generic(struct e1000_hw
*hw
, u8
*addr
, u32 index
)
445 u32 rar_low
, rar_high
;
447 DEBUGFUNC("e1000_rar_set_generic");
450 * HW expects these in little endian so we reverse the byte order
451 * from network order (big endian) to little endian
453 rar_low
= ((u32
) addr
[0] |
454 ((u32
) addr
[1] << 8) |
455 ((u32
) addr
[2] << 16) | ((u32
) addr
[3] << 24));
457 rar_high
= ((u32
) addr
[4] | ((u32
) addr
[5] << 8));
459 /* If MAC address zero, no need to set the AV bit */
460 if (rar_low
|| rar_high
)
461 rar_high
|= E1000_RAH_AV
;
464 * Some bridges will combine consecutive 32-bit writes into
465 * a single burst write, which will malfunction on some parts.
466 * The flushes avoid this.
468 E1000_WRITE_REG(hw
, E1000_RAL(index
), rar_low
);
469 E1000_WRITE_FLUSH(hw
);
470 E1000_WRITE_REG(hw
, E1000_RAH(index
), rar_high
);
471 E1000_WRITE_FLUSH(hw
);
475 * e1000_mta_set_generic - Set multicast filter table address
476 * @hw: pointer to the HW structure
477 * @hash_value: determines the MTA register and bit to set
479 * The multicast table address is a register array of 32-bit registers.
480 * The hash_value is used to determine what register the bit is in, the
481 * current value is read, the new bit is OR'd in and the new value is
482 * written back into the register.
484 void e1000_mta_set_generic(struct e1000_hw
*hw
, u32 hash_value
)
486 u32 hash_bit
, hash_reg
, mta
;
488 DEBUGFUNC("e1000_mta_set_generic");
490 * The MTA is a register array of 32-bit registers. It is
491 * treated like an array of (32*mta_reg_count) bits. We want to
492 * set bit BitArray[hash_value]. So we figure out what register
493 * the bit is in, read it, OR in the new bit, then write
494 * back the new value. The (hw->mac.mta_reg_count - 1) serves as a
495 * mask to bits 31:5 of the hash value which gives us the
496 * register we're modifying. The hash bit within that register
497 * is determined by the lower 5 bits of the hash value.
499 hash_reg
= (hash_value
>> 5) & (hw
->mac
.mta_reg_count
- 1);
500 hash_bit
= hash_value
& 0x1F;
502 mta
= E1000_READ_REG_ARRAY(hw
, E1000_MTA
, hash_reg
);
504 mta
|= (1 << hash_bit
);
506 E1000_WRITE_REG_ARRAY(hw
, E1000_MTA
, hash_reg
, mta
);
507 E1000_WRITE_FLUSH(hw
);
511 * e1000_update_mc_addr_list_generic - Update Multicast addresses
512 * @hw: pointer to the HW structure
513 * @mc_addr_list: array of multicast addresses to program
514 * @mc_addr_count: number of multicast addresses to program
516 * Updates entire Multicast Table Array.
517 * The caller must have a packed mc_addr_list of multicast addresses.
519 void e1000_update_mc_addr_list_generic(struct e1000_hw
*hw
,
520 u8
*mc_addr_list
, u32 mc_addr_count
)
522 u32 hash_value
, hash_bit
, hash_reg
;
525 DEBUGFUNC("e1000_update_mc_addr_list_generic");
527 /* clear mta_shadow */
528 memset(&hw
->mac
.mta_shadow
, 0, sizeof(hw
->mac
.mta_shadow
));
530 /* update mta_shadow from mc_addr_list */
531 for (i
= 0; (u32
) i
< mc_addr_count
; i
++) {
532 hash_value
= e1000_hash_mc_addr_generic(hw
, mc_addr_list
);
534 hash_reg
= (hash_value
>> 5) & (hw
->mac
.mta_reg_count
- 1);
535 hash_bit
= hash_value
& 0x1F;
537 hw
->mac
.mta_shadow
[hash_reg
] |= (1 << hash_bit
);
538 mc_addr_list
+= (ETH_ADDR_LEN
);
541 /* replace the entire MTA table */
542 for (i
= hw
->mac
.mta_reg_count
- 1; i
>= 0; i
--)
543 E1000_WRITE_REG_ARRAY(hw
, E1000_MTA
, i
, hw
->mac
.mta_shadow
[i
]);
544 E1000_WRITE_FLUSH(hw
);
548 * e1000_hash_mc_addr_generic - Generate a multicast hash value
549 * @hw: pointer to the HW structure
550 * @mc_addr: pointer to a multicast address
552 * Generates a multicast address hash value which is used to determine
553 * the multicast filter table array address and new table value. See
554 * e1000_mta_set_generic()
556 u32
e1000_hash_mc_addr_generic(struct e1000_hw
*hw
, u8
*mc_addr
)
558 u32 hash_value
, hash_mask
;
561 DEBUGFUNC("e1000_hash_mc_addr_generic");
563 /* Register count multiplied by bits per register */
564 hash_mask
= (hw
->mac
.mta_reg_count
* 32) - 1;
567 * For a mc_filter_type of 0, bit_shift is the number of left-shifts
568 * where 0xFF would still fall within the hash mask.
570 while (hash_mask
>> bit_shift
!= 0xFF)
574 * The portion of the address that is used for the hash table
575 * is determined by the mc_filter_type setting.
576 * The algorithm is such that there is a total of 8 bits of shifting.
577 * The bit_shift for a mc_filter_type of 0 represents the number of
578 * left-shifts where the MSB of mc_addr[5] would still fall within
579 * the hash_mask. Case 0 does this exactly. Since there are a total
580 * of 8 bits of shifting, then mc_addr[4] will shift right the
581 * remaining number of bits. Thus 8 - bit_shift. The rest of the
582 * cases are a variation of this algorithm...essentially raising the
583 * number of bits to shift mc_addr[5] left, while still keeping the
584 * 8-bit shifting total.
586 * For example, given the following Destination MAC Address and an
587 * mta register count of 128 (thus a 4096-bit vector and 0xFFF mask),
588 * we can see that the bit_shift for case 0 is 4. These are the hash
589 * values resulting from each mc_filter_type...
590 * [0] [1] [2] [3] [4] [5]
594 * case 0: hash_value = ((0x34 >> 4) | (0x56 << 4)) & 0xFFF = 0x563
595 * case 1: hash_value = ((0x34 >> 3) | (0x56 << 5)) & 0xFFF = 0xAC6
596 * case 2: hash_value = ((0x34 >> 2) | (0x56 << 6)) & 0xFFF = 0x163
597 * case 3: hash_value = ((0x34 >> 0) | (0x56 << 8)) & 0xFFF = 0x634
599 switch (hw
->mac
.mc_filter_type
) {
614 hash_value
= hash_mask
& (((mc_addr
[4] >> (8 - bit_shift
)) |
615 (((u16
) mc_addr
[5]) << bit_shift
)));
621 * e1000_pcix_mmrbc_workaround_generic - Fix incorrect MMRBC value
622 * @hw: pointer to the HW structure
624 * In certain situations, a system BIOS may report that the PCIx maximum
625 * memory read byte count (MMRBC) value is higher than than the actual
626 * value. We check the PCIx command register with the current PCIx status
629 void e1000_pcix_mmrbc_workaround_generic(struct e1000_hw
*hw
)
633 u16 pcix_stat_hi_word
;
636 DEBUGFUNC("e1000_pcix_mmrbc_workaround_generic");
638 /* Workaround for PCI-X issue when BIOS sets MMRBC incorrectly */
639 if (hw
->bus
.type
!= e1000_bus_type_pcix
)
642 e1000_read_pci_cfg(hw
, PCIX_COMMAND_REGISTER
, &pcix_cmd
);
643 e1000_read_pci_cfg(hw
, PCIX_STATUS_REGISTER_HI
, &pcix_stat_hi_word
);
644 cmd_mmrbc
= (pcix_cmd
& PCIX_COMMAND_MMRBC_MASK
) >>
645 PCIX_COMMAND_MMRBC_SHIFT
;
646 stat_mmrbc
= (pcix_stat_hi_word
& PCIX_STATUS_HI_MMRBC_MASK
) >>
647 PCIX_STATUS_HI_MMRBC_SHIFT
;
648 if (stat_mmrbc
== PCIX_STATUS_HI_MMRBC_4K
)
649 stat_mmrbc
= PCIX_STATUS_HI_MMRBC_2K
;
650 if (cmd_mmrbc
> stat_mmrbc
) {
651 pcix_cmd
&= ~PCIX_COMMAND_MMRBC_MASK
;
652 pcix_cmd
|= stat_mmrbc
<< PCIX_COMMAND_MMRBC_SHIFT
;
653 e1000_write_pci_cfg(hw
, PCIX_COMMAND_REGISTER
, &pcix_cmd
);
658 * e1000_clear_hw_cntrs_base_generic - Clear base hardware counters
659 * @hw: pointer to the HW structure
661 * Clears the base hardware counters by reading the counter registers.
663 void e1000_clear_hw_cntrs_base_generic(struct e1000_hw
*hw
)
665 DEBUGFUNC("e1000_clear_hw_cntrs_base_generic");
667 E1000_READ_REG(hw
, E1000_CRCERRS
);
668 E1000_READ_REG(hw
, E1000_SYMERRS
);
669 E1000_READ_REG(hw
, E1000_MPC
);
670 E1000_READ_REG(hw
, E1000_SCC
);
671 E1000_READ_REG(hw
, E1000_ECOL
);
672 E1000_READ_REG(hw
, E1000_MCC
);
673 E1000_READ_REG(hw
, E1000_LATECOL
);
674 E1000_READ_REG(hw
, E1000_COLC
);
675 E1000_READ_REG(hw
, E1000_DC
);
676 E1000_READ_REG(hw
, E1000_SEC
);
677 E1000_READ_REG(hw
, E1000_RLEC
);
678 E1000_READ_REG(hw
, E1000_XONRXC
);
679 E1000_READ_REG(hw
, E1000_XONTXC
);
680 E1000_READ_REG(hw
, E1000_XOFFRXC
);
681 E1000_READ_REG(hw
, E1000_XOFFTXC
);
682 E1000_READ_REG(hw
, E1000_FCRUC
);
683 E1000_READ_REG(hw
, E1000_GPRC
);
684 E1000_READ_REG(hw
, E1000_BPRC
);
685 E1000_READ_REG(hw
, E1000_MPRC
);
686 E1000_READ_REG(hw
, E1000_GPTC
);
687 E1000_READ_REG(hw
, E1000_GORCL
);
688 E1000_READ_REG(hw
, E1000_GORCH
);
689 E1000_READ_REG(hw
, E1000_GOTCL
);
690 E1000_READ_REG(hw
, E1000_GOTCH
);
691 E1000_READ_REG(hw
, E1000_RNBC
);
692 E1000_READ_REG(hw
, E1000_RUC
);
693 E1000_READ_REG(hw
, E1000_RFC
);
694 E1000_READ_REG(hw
, E1000_ROC
);
695 E1000_READ_REG(hw
, E1000_RJC
);
696 E1000_READ_REG(hw
, E1000_TORL
);
697 E1000_READ_REG(hw
, E1000_TORH
);
698 E1000_READ_REG(hw
, E1000_TOTL
);
699 E1000_READ_REG(hw
, E1000_TOTH
);
700 E1000_READ_REG(hw
, E1000_TPR
);
701 E1000_READ_REG(hw
, E1000_TPT
);
702 E1000_READ_REG(hw
, E1000_MPTC
);
703 E1000_READ_REG(hw
, E1000_BPTC
);
707 * e1000_check_for_copper_link_generic - Check for link (Copper)
708 * @hw: pointer to the HW structure
710 * Checks to see of the link status of the hardware has changed. If a
711 * change in link status has been detected, then we read the PHY registers
712 * to get the current speed/duplex if link exists.
714 s32
e1000_check_for_copper_link_generic(struct e1000_hw
*hw
)
716 struct e1000_mac_info
*mac
= &hw
->mac
;
720 DEBUGFUNC("e1000_check_for_copper_link");
723 * We only want to go out to the PHY registers to see if Auto-Neg
724 * has completed and/or if our link status has changed. The
725 * get_link_status flag is set upon receiving a Link Status
726 * Change or Rx Sequence Error interrupt.
728 if (!mac
->get_link_status
) {
729 ret_val
= E1000_SUCCESS
;
734 * First we want to see if the MII Status Register reports
735 * link. If so, then we want to get the current speed/duplex
738 ret_val
= e1000_phy_has_link_generic(hw
, 1, 0, &link
);
743 goto out
; /* No link detected */
745 mac
->get_link_status
= false;
748 * Check if there was DownShift, must be checked
749 * immediately after link-up
751 e1000_check_downshift_generic(hw
);
754 * If we are forcing speed/duplex, then we simply return since
755 * we have already determined whether we have link or not.
758 ret_val
= -E1000_ERR_CONFIG
;
763 * Auto-Neg is enabled. Auto Speed Detection takes care
764 * of MAC speed/duplex configuration. So we only need to
765 * configure Collision Distance in the MAC.
767 e1000_config_collision_dist_generic(hw
);
770 * Configure Flow Control now that Auto-Neg has completed.
771 * First, we need to restore the desired flow control
772 * settings because we may have had to re-autoneg with a
773 * different link partner.
775 ret_val
= e1000_config_fc_after_link_up_generic(hw
);
777 DEBUGOUT("Error configuring flow control\n");
784 * e1000_check_for_fiber_link_generic - Check for link (Fiber)
785 * @hw: pointer to the HW structure
787 * Checks for link up on the hardware. If link is not up and we have
788 * a signal, then we need to force link up.
790 s32
e1000_check_for_fiber_link_generic(struct e1000_hw
*hw
)
792 struct e1000_mac_info
*mac
= &hw
->mac
;
796 s32 ret_val
= E1000_SUCCESS
;
798 DEBUGFUNC("e1000_check_for_fiber_link_generic");
800 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
801 status
= E1000_READ_REG(hw
, E1000_STATUS
);
802 rxcw
= E1000_READ_REG(hw
, E1000_RXCW
);
805 * If we don't have link (auto-negotiation failed or link partner
806 * cannot auto-negotiate), the cable is plugged in (we have signal),
807 * and our link partner is not trying to auto-negotiate with us (we
808 * are receiving idles or data), we need to force link up. We also
809 * need to give auto-negotiation time to complete, in case the cable
810 * was just plugged in. The autoneg_failed flag does this.
812 /* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */
813 if ((ctrl
& E1000_CTRL_SWDPIN1
) && (!(status
& E1000_STATUS_LU
)) &&
814 (!(rxcw
& E1000_RXCW_C
))) {
815 if (mac
->autoneg_failed
== 0) {
816 mac
->autoneg_failed
= 1;
819 DEBUGOUT("NOT RXing /C/, disable AutoNeg and force link.\n");
821 /* Disable auto-negotiation in the TXCW register */
822 E1000_WRITE_REG(hw
, E1000_TXCW
, (mac
->txcw
& ~E1000_TXCW_ANE
));
824 /* Force link-up and also force full-duplex. */
825 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
826 ctrl
|= (E1000_CTRL_SLU
| E1000_CTRL_FD
);
827 E1000_WRITE_REG(hw
, E1000_CTRL
, ctrl
);
829 /* Configure Flow Control after forcing link up. */
830 ret_val
= e1000_config_fc_after_link_up_generic(hw
);
832 DEBUGOUT("Error configuring flow control\n");
835 } else if ((ctrl
& E1000_CTRL_SLU
) && (rxcw
& E1000_RXCW_C
)) {
837 * If we are forcing link and we are receiving /C/ ordered
838 * sets, re-enable auto-negotiation in the TXCW register
839 * and disable forced link in the Device Control register
840 * in an attempt to auto-negotiate with our link partner.
842 DEBUGOUT("RXing /C/, enable AutoNeg and stop forcing link.\n");
843 E1000_WRITE_REG(hw
, E1000_TXCW
, mac
->txcw
);
844 E1000_WRITE_REG(hw
, E1000_CTRL
, (ctrl
& ~E1000_CTRL_SLU
));
846 mac
->serdes_has_link
= true;
854 * e1000_check_for_serdes_link_generic - Check for link (Serdes)
855 * @hw: pointer to the HW structure
857 * Checks for link up on the hardware. If link is not up and we have
858 * a signal, then we need to force link up.
860 s32
e1000_check_for_serdes_link_generic(struct e1000_hw
*hw
)
862 struct e1000_mac_info
*mac
= &hw
->mac
;
866 s32 ret_val
= E1000_SUCCESS
;
868 DEBUGFUNC("e1000_check_for_serdes_link_generic");
870 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
871 status
= E1000_READ_REG(hw
, E1000_STATUS
);
872 rxcw
= E1000_READ_REG(hw
, E1000_RXCW
);
875 * If we don't have link (auto-negotiation failed or link partner
876 * cannot auto-negotiate), and our link partner is not trying to
877 * auto-negotiate with us (we are receiving idles or data),
878 * we need to force link up. We also need to give auto-negotiation
881 /* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */
882 if ((!(status
& E1000_STATUS_LU
)) && (!(rxcw
& E1000_RXCW_C
))) {
883 if (mac
->autoneg_failed
== 0) {
884 mac
->autoneg_failed
= 1;
887 DEBUGOUT("NOT RXing /C/, disable AutoNeg and force link.\n");
889 /* Disable auto-negotiation in the TXCW register */
890 E1000_WRITE_REG(hw
, E1000_TXCW
, (mac
->txcw
& ~E1000_TXCW_ANE
));
892 /* Force link-up and also force full-duplex. */
893 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
894 ctrl
|= (E1000_CTRL_SLU
| E1000_CTRL_FD
);
895 E1000_WRITE_REG(hw
, E1000_CTRL
, ctrl
);
897 /* Configure Flow Control after forcing link up. */
898 ret_val
= e1000_config_fc_after_link_up_generic(hw
);
900 DEBUGOUT("Error configuring flow control\n");
903 } else if ((ctrl
& E1000_CTRL_SLU
) && (rxcw
& E1000_RXCW_C
)) {
905 * If we are forcing link and we are receiving /C/ ordered
906 * sets, re-enable auto-negotiation in the TXCW register
907 * and disable forced link in the Device Control register
908 * in an attempt to auto-negotiate with our link partner.
910 DEBUGOUT("RXing /C/, enable AutoNeg and stop forcing link.\n");
911 E1000_WRITE_REG(hw
, E1000_TXCW
, mac
->txcw
);
912 E1000_WRITE_REG(hw
, E1000_CTRL
, (ctrl
& ~E1000_CTRL_SLU
));
914 mac
->serdes_has_link
= true;
915 } else if (!(E1000_TXCW_ANE
& E1000_READ_REG(hw
, E1000_TXCW
))) {
917 * If we force link for non-auto-negotiation switch, check
918 * link status based on MAC synchronization for internal
921 /* SYNCH bit and IV bit are sticky. */
923 rxcw
= E1000_READ_REG(hw
, E1000_RXCW
);
924 if (rxcw
& E1000_RXCW_SYNCH
) {
925 if (!(rxcw
& E1000_RXCW_IV
)) {
926 mac
->serdes_has_link
= true;
927 DEBUGOUT("SERDES: Link up - forced.\n");
930 mac
->serdes_has_link
= false;
931 DEBUGOUT("SERDES: Link down - force failed.\n");
935 if (E1000_TXCW_ANE
& E1000_READ_REG(hw
, E1000_TXCW
)) {
936 status
= E1000_READ_REG(hw
, E1000_STATUS
);
937 if (status
& E1000_STATUS_LU
) {
938 /* SYNCH bit and IV bit are sticky, so reread rxcw. */
940 rxcw
= E1000_READ_REG(hw
, E1000_RXCW
);
941 if (rxcw
& E1000_RXCW_SYNCH
) {
942 if (!(rxcw
& E1000_RXCW_IV
)) {
943 mac
->serdes_has_link
= true;
944 DEBUGOUT("SERDES: Link up - autoneg "
945 "completed sucessfully.\n");
947 mac
->serdes_has_link
= false;
948 DEBUGOUT("SERDES: Link down - invalid"
949 "codewords detected in autoneg.\n");
952 mac
->serdes_has_link
= false;
953 DEBUGOUT("SERDES: Link down - no sync.\n");
956 mac
->serdes_has_link
= false;
957 DEBUGOUT("SERDES: Link down - autoneg failed\n");
966 * e1000_setup_link_generic - Setup flow control and link settings
967 * @hw: pointer to the HW structure
969 * Determines which flow control settings to use, then configures flow
970 * control. Calls the appropriate media-specific link configuration
971 * function. Assuming the adapter has a valid link partner, a valid link
972 * should be established. Assumes the hardware has previously been reset
973 * and the transmitter and receiver are not enabled.
975 s32
e1000_setup_link_generic(struct e1000_hw
*hw
)
977 s32 ret_val
= E1000_SUCCESS
;
979 DEBUGFUNC("e1000_setup_link_generic");
982 * In the case of the phy reset being blocked, we already have a link.
983 * We do not need to set it up again.
985 if (hw
->phy
.ops
.check_reset_block
)
986 if (hw
->phy
.ops
.check_reset_block(hw
))
990 * If requested flow control is set to default, set flow control
991 * based on the EEPROM flow control settings.
993 if (hw
->fc
.requested_mode
== e1000_fc_default
) {
994 ret_val
= e1000_set_default_fc_generic(hw
);
1000 * Save off the requested flow control mode for use later. Depending
1001 * on the link partner's capabilities, we may or may not use this mode.
1003 hw
->fc
.current_mode
= hw
->fc
.requested_mode
;
1005 DEBUGOUT1("After fix-ups FlowControl is now = %x\n",
1006 hw
->fc
.current_mode
);
1008 /* Call the necessary media_type subroutine to configure the link. */
1009 ret_val
= hw
->mac
.ops
.setup_physical_interface(hw
);
1014 * Initialize the flow control address, type, and PAUSE timer
1015 * registers to their default values. This is done even if flow
1016 * control is disabled, because it does not hurt anything to
1017 * initialize these registers.
1019 DEBUGOUT("Initializing the Flow Control address, type and timer regs\n");
1020 E1000_WRITE_REG(hw
, E1000_FCT
, FLOW_CONTROL_TYPE
);
1021 E1000_WRITE_REG(hw
, E1000_FCAH
, FLOW_CONTROL_ADDRESS_HIGH
);
1022 E1000_WRITE_REG(hw
, E1000_FCAL
, FLOW_CONTROL_ADDRESS_LOW
);
1024 E1000_WRITE_REG(hw
, E1000_FCTTV
, hw
->fc
.pause_time
);
1026 ret_val
= e1000_set_fc_watermarks_generic(hw
);
1033 * e1000_setup_fiber_serdes_link_generic - Setup link for fiber/serdes
1034 * @hw: pointer to the HW structure
1036 * Configures collision distance and flow control for fiber and serdes
1037 * links. Upon successful setup, poll for link.
1039 s32
e1000_setup_fiber_serdes_link_generic(struct e1000_hw
*hw
)
1042 s32 ret_val
= E1000_SUCCESS
;
1044 DEBUGFUNC("e1000_setup_fiber_serdes_link_generic");
1046 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
1048 /* Take the link out of reset */
1049 ctrl
&= ~E1000_CTRL_LRST
;
1051 e1000_config_collision_dist_generic(hw
);
1053 ret_val
= e1000_commit_fc_settings_generic(hw
);
1058 * Since auto-negotiation is enabled, take the link out of reset (the
1059 * link will be in reset, because we previously reset the chip). This
1060 * will restart auto-negotiation. If auto-negotiation is successful
1061 * then the link-up status bit will be set and the flow control enable
1062 * bits (RFCE and TFCE) will be set according to their negotiated value.
1064 DEBUGOUT("Auto-negotiation enabled\n");
1066 E1000_WRITE_REG(hw
, E1000_CTRL
, ctrl
);
1067 E1000_WRITE_FLUSH(hw
);
1071 * For these adapters, the SW definable pin 1 is set when the optics
1072 * detect a signal. If we have a signal, then poll for a "Link-Up"
1075 if (hw
->phy
.media_type
== e1000_media_type_internal_serdes
||
1076 (E1000_READ_REG(hw
, E1000_CTRL
) & E1000_CTRL_SWDPIN1
)) {
1077 ret_val
= e1000_poll_fiber_serdes_link_generic(hw
);
1079 DEBUGOUT("No signal detected\n");
1087 * e1000_config_collision_dist_generic - Configure collision distance
1088 * @hw: pointer to the HW structure
1090 * Configures the collision distance to the default value and is used
1091 * during link setup. Currently no func pointer exists and all
1092 * implementations are handled in the generic version of this function.
1094 void e1000_config_collision_dist_generic(struct e1000_hw
*hw
)
1098 DEBUGFUNC("e1000_config_collision_dist_generic");
1100 tctl
= E1000_READ_REG(hw
, E1000_TCTL
);
1102 tctl
&= ~E1000_TCTL_COLD
;
1103 tctl
|= E1000_COLLISION_DISTANCE
<< E1000_COLD_SHIFT
;
1105 E1000_WRITE_REG(hw
, E1000_TCTL
, tctl
);
1106 E1000_WRITE_FLUSH(hw
);
1110 * e1000_poll_fiber_serdes_link_generic - Poll for link up
1111 * @hw: pointer to the HW structure
1113 * Polls for link up by reading the status register, if link fails to come
1114 * up with auto-negotiation, then the link is forced if a signal is detected.
1116 s32
e1000_poll_fiber_serdes_link_generic(struct e1000_hw
*hw
)
1118 struct e1000_mac_info
*mac
= &hw
->mac
;
1120 s32 ret_val
= E1000_SUCCESS
;
1122 DEBUGFUNC("e1000_poll_fiber_serdes_link_generic");
1125 * If we have a signal (the cable is plugged in, or assumed true for
1126 * serdes media) then poll for a "Link-Up" indication in the Device
1127 * Status Register. Time-out if a link isn't seen in 500 milliseconds
1128 * seconds (Auto-negotiation should complete in less than 500
1129 * milliseconds even if the other end is doing it in SW).
1131 for (i
= 0; i
< FIBER_LINK_UP_LIMIT
; i
++) {
1133 status
= E1000_READ_REG(hw
, E1000_STATUS
);
1134 if (status
& E1000_STATUS_LU
)
1137 if (i
== FIBER_LINK_UP_LIMIT
) {
1138 DEBUGOUT("Never got a valid link from auto-neg!!!\n");
1139 mac
->autoneg_failed
= 1;
1141 * AutoNeg failed to achieve a link, so we'll call
1142 * mac->check_for_link. This routine will force the
1143 * link up if we detect a signal. This will allow us to
1144 * communicate with non-autonegotiating link partners.
1146 ret_val
= hw
->mac
.ops
.check_for_link(hw
);
1148 DEBUGOUT("Error while checking for link\n");
1151 mac
->autoneg_failed
= 0;
1153 mac
->autoneg_failed
= 0;
1154 DEBUGOUT("Valid Link Found\n");
1162 * e1000_commit_fc_settings_generic - Configure flow control
1163 * @hw: pointer to the HW structure
1165 * Write the flow control settings to the Transmit Config Word Register (TXCW)
1166 * base on the flow control settings in e1000_mac_info.
1168 s32
e1000_commit_fc_settings_generic(struct e1000_hw
*hw
)
1170 struct e1000_mac_info
*mac
= &hw
->mac
;
1172 s32 ret_val
= E1000_SUCCESS
;
1174 DEBUGFUNC("e1000_commit_fc_settings_generic");
1177 * Check for a software override of the flow control settings, and
1178 * setup the device accordingly. If auto-negotiation is enabled, then
1179 * software will have to set the "PAUSE" bits to the correct value in
1180 * the Transmit Config Word Register (TXCW) and re-start auto-
1181 * negotiation. However, if auto-negotiation is disabled, then
1182 * software will have to manually configure the two flow control enable
1183 * bits in the CTRL register.
1185 * The possible values of the "fc" parameter are:
1186 * 0: Flow control is completely disabled
1187 * 1: Rx flow control is enabled (we can receive pause frames,
1188 * but not send pause frames).
1189 * 2: Tx flow control is enabled (we can send pause frames but we
1190 * do not support receiving pause frames).
1191 * 3: Both Rx and Tx flow control (symmetric) are enabled.
1193 switch (hw
->fc
.current_mode
) {
1195 /* Flow control completely disabled by a software over-ride. */
1196 txcw
= (E1000_TXCW_ANE
| E1000_TXCW_FD
);
1198 case e1000_fc_rx_pause
:
1200 * Rx Flow control is enabled and Tx Flow control is disabled
1201 * by a software over-ride. Since there really isn't a way to
1202 * advertise that we are capable of Rx Pause ONLY, we will
1203 * advertise that we support both symmetric and asymmetric RX
1204 * PAUSE. Later, we will disable the adapter's ability to send
1207 txcw
= (E1000_TXCW_ANE
| E1000_TXCW_FD
| E1000_TXCW_PAUSE_MASK
);
1209 case e1000_fc_tx_pause
:
1211 * Tx Flow control is enabled, and Rx Flow control is disabled,
1212 * by a software over-ride.
1214 txcw
= (E1000_TXCW_ANE
| E1000_TXCW_FD
| E1000_TXCW_ASM_DIR
);
1218 * Flow control (both Rx and Tx) is enabled by a software
1221 txcw
= (E1000_TXCW_ANE
| E1000_TXCW_FD
| E1000_TXCW_PAUSE_MASK
);
1224 DEBUGOUT("Flow control param set incorrectly\n");
1225 ret_val
= -E1000_ERR_CONFIG
;
1230 E1000_WRITE_REG(hw
, E1000_TXCW
, txcw
);
1238 * e1000_set_fc_watermarks_generic - Set flow control high/low watermarks
1239 * @hw: pointer to the HW structure
1241 * Sets the flow control high/low threshold (watermark) registers. If
1242 * flow control XON frame transmission is enabled, then set XON frame
1243 * transmission as well.
1245 s32
e1000_set_fc_watermarks_generic(struct e1000_hw
*hw
)
1247 s32 ret_val
= E1000_SUCCESS
;
1248 u32 fcrtl
= 0, fcrth
= 0;
1250 DEBUGFUNC("e1000_set_fc_watermarks_generic");
1253 * Set the flow control receive threshold registers. Normally,
1254 * these registers will be set to a default threshold that may be
1255 * adjusted later by the driver's runtime code. However, if the
1256 * ability to transmit pause frames is not enabled, then these
1257 * registers will be set to 0.
1259 if (hw
->fc
.current_mode
& e1000_fc_tx_pause
) {
1261 * We need to set up the Receive Threshold high and low water
1262 * marks as well as (optionally) enabling the transmission of
1265 fcrtl
= hw
->fc
.low_water
;
1266 if (hw
->fc
.send_xon
)
1267 fcrtl
|= E1000_FCRTL_XONE
;
1269 fcrth
= hw
->fc
.high_water
;
1271 E1000_WRITE_REG(hw
, E1000_FCRTL
, fcrtl
);
1272 E1000_WRITE_REG(hw
, E1000_FCRTH
, fcrth
);
1278 * e1000_set_default_fc_generic - Set flow control default values
1279 * @hw: pointer to the HW structure
1281 * Read the EEPROM for the default values for flow control and store the
1284 s32
e1000_set_default_fc_generic(struct e1000_hw
*hw
)
1286 s32 ret_val
= E1000_SUCCESS
;
1289 DEBUGFUNC("e1000_set_default_fc_generic");
1292 * Read and store word 0x0F of the EEPROM. This word contains bits
1293 * that determine the hardware's default PAUSE (flow control) mode,
1294 * a bit that determines whether the HW defaults to enabling or
1295 * disabling auto-negotiation, and the direction of the
1296 * SW defined pins. If there is no SW over-ride of the flow
1297 * control setting, then the variable hw->fc will
1298 * be initialized based on a value in the EEPROM.
1300 ret_val
= hw
->nvm
.ops
.read(hw
, NVM_INIT_CONTROL2_REG
, 1, &nvm_data
);
1303 DEBUGOUT("NVM Read Error\n");
1307 if ((nvm_data
& NVM_WORD0F_PAUSE_MASK
) == 0)
1308 hw
->fc
.requested_mode
= e1000_fc_none
;
1309 else if ((nvm_data
& NVM_WORD0F_PAUSE_MASK
) ==
1311 hw
->fc
.requested_mode
= e1000_fc_tx_pause
;
1313 hw
->fc
.requested_mode
= e1000_fc_full
;
1320 * e1000_force_mac_fc_generic - Force the MAC's flow control settings
1321 * @hw: pointer to the HW structure
1323 * Force the MAC's flow control settings. Sets the TFCE and RFCE bits in the
1324 * device control register to reflect the adapter settings. TFCE and RFCE
1325 * need to be explicitly set by software when a copper PHY is used because
1326 * autonegotiation is managed by the PHY rather than the MAC. Software must
1327 * also configure these bits when link is forced on a fiber connection.
1329 s32
e1000_force_mac_fc_generic(struct e1000_hw
*hw
)
1332 s32 ret_val
= E1000_SUCCESS
;
1334 DEBUGFUNC("e1000_force_mac_fc_generic");
1336 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
1339 * Because we didn't get link via the internal auto-negotiation
1340 * mechanism (we either forced link or we got link via PHY
1341 * auto-neg), we have to manually enable/disable transmit an
1342 * receive flow control.
1344 * The "Case" statement below enables/disable flow control
1345 * according to the "hw->fc.current_mode" parameter.
1347 * The possible values of the "fc" parameter are:
1348 * 0: Flow control is completely disabled
1349 * 1: Rx flow control is enabled (we can receive pause
1350 * frames but not send pause frames).
1351 * 2: Tx flow control is enabled (we can send pause frames
1352 * frames but we do not receive pause frames).
1353 * 3: Both Rx and Tx flow control (symmetric) is enabled.
1354 * other: No other values should be possible at this point.
1356 DEBUGOUT1("hw->fc.current_mode = %u\n", hw
->fc
.current_mode
);
1358 switch (hw
->fc
.current_mode
) {
1360 ctrl
&= (~(E1000_CTRL_TFCE
| E1000_CTRL_RFCE
));
1362 case e1000_fc_rx_pause
:
1363 ctrl
&= (~E1000_CTRL_TFCE
);
1364 ctrl
|= E1000_CTRL_RFCE
;
1366 case e1000_fc_tx_pause
:
1367 ctrl
&= (~E1000_CTRL_RFCE
);
1368 ctrl
|= E1000_CTRL_TFCE
;
1371 ctrl
|= (E1000_CTRL_TFCE
| E1000_CTRL_RFCE
);
1374 DEBUGOUT("Flow control param set incorrectly\n");
1375 ret_val
= -E1000_ERR_CONFIG
;
1379 E1000_WRITE_REG(hw
, E1000_CTRL
, ctrl
);
1386 * e1000_config_fc_after_link_up_generic - Configures flow control after link
1387 * @hw: pointer to the HW structure
1389 * Checks the status of auto-negotiation after link up to ensure that the
1390 * speed and duplex were not forced. If the link needed to be forced, then
1391 * flow control needs to be forced also. If auto-negotiation is enabled
1392 * and did not fail, then we configure flow control based on our link
1395 s32
e1000_config_fc_after_link_up_generic(struct e1000_hw
*hw
)
1397 struct e1000_mac_info
*mac
= &hw
->mac
;
1398 s32 ret_val
= E1000_SUCCESS
;
1399 u16 mii_status_reg
, mii_nway_adv_reg
, mii_nway_lp_ability_reg
;
1402 DEBUGFUNC("e1000_config_fc_after_link_up_generic");
1405 * Check for the case where we have fiber media and auto-neg failed
1406 * so we had to force link. In this case, we need to force the
1407 * configuration of the MAC to match the "fc" parameter.
1409 if (mac
->autoneg_failed
) {
1410 if (hw
->phy
.media_type
== e1000_media_type_fiber
||
1411 hw
->phy
.media_type
== e1000_media_type_internal_serdes
)
1412 ret_val
= e1000_force_mac_fc_generic(hw
);
1414 if (hw
->phy
.media_type
== e1000_media_type_copper
)
1415 ret_val
= e1000_force_mac_fc_generic(hw
);
1419 DEBUGOUT("Error forcing flow control settings\n");
1424 * Check for the case where we have copper media and auto-neg is
1425 * enabled. In this case, we need to check and see if Auto-Neg
1426 * has completed, and if so, how the PHY and link partner has
1427 * flow control configured.
1429 if ((hw
->phy
.media_type
== e1000_media_type_copper
) && mac
->autoneg
) {
1431 * Read the MII Status Register and check to see if AutoNeg
1432 * has completed. We read this twice because this reg has
1433 * some "sticky" (latched) bits.
1435 ret_val
= hw
->phy
.ops
.read_reg(hw
, PHY_STATUS
, &mii_status_reg
);
1438 ret_val
= hw
->phy
.ops
.read_reg(hw
, PHY_STATUS
, &mii_status_reg
);
1442 if (!(mii_status_reg
& MII_SR_AUTONEG_COMPLETE
)) {
1443 DEBUGOUT("Copper PHY and Auto Neg "
1444 "has not completed.\n");
1449 * The AutoNeg process has completed, so we now need to
1450 * read both the Auto Negotiation Advertisement
1451 * Register (Address 4) and the Auto_Negotiation Base
1452 * Page Ability Register (Address 5) to determine how
1453 * flow control was negotiated.
1455 ret_val
= hw
->phy
.ops
.read_reg(hw
, PHY_AUTONEG_ADV
,
1459 ret_val
= hw
->phy
.ops
.read_reg(hw
, PHY_LP_ABILITY
,
1460 &mii_nway_lp_ability_reg
);
1465 * Two bits in the Auto Negotiation Advertisement Register
1466 * (Address 4) and two bits in the Auto Negotiation Base
1467 * Page Ability Register (Address 5) determine flow control
1468 * for both the PHY and the link partner. The following
1469 * table, taken out of the IEEE 802.3ab/D6.0 dated March 25,
1470 * 1999, describes these PAUSE resolution bits and how flow
1471 * control is determined based upon these settings.
1472 * NOTE: DC = Don't Care
1474 * LOCAL DEVICE | LINK PARTNER
1475 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | NIC Resolution
1476 *-------|---------|-------|---------|--------------------
1477 * 0 | 0 | DC | DC | e1000_fc_none
1478 * 0 | 1 | 0 | DC | e1000_fc_none
1479 * 0 | 1 | 1 | 0 | e1000_fc_none
1480 * 0 | 1 | 1 | 1 | e1000_fc_tx_pause
1481 * 1 | 0 | 0 | DC | e1000_fc_none
1482 * 1 | DC | 1 | DC | e1000_fc_full
1483 * 1 | 1 | 0 | 0 | e1000_fc_none
1484 * 1 | 1 | 0 | 1 | e1000_fc_rx_pause
1486 * Are both PAUSE bits set to 1? If so, this implies
1487 * Symmetric Flow Control is enabled at both ends. The
1488 * ASM_DIR bits are irrelevant per the spec.
1490 * For Symmetric Flow Control:
1492 * LOCAL DEVICE | LINK PARTNER
1493 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
1494 *-------|---------|-------|---------|--------------------
1495 * 1 | DC | 1 | DC | E1000_fc_full
1498 if ((mii_nway_adv_reg
& NWAY_AR_PAUSE
) &&
1499 (mii_nway_lp_ability_reg
& NWAY_LPAR_PAUSE
)) {
1501 * Now we need to check if the user selected Rx ONLY
1502 * of pause frames. In this case, we had to advertise
1503 * FULL flow control because we could not advertise RX
1504 * ONLY. Hence, we must now check to see if we need to
1505 * turn OFF the TRANSMISSION of PAUSE frames.
1507 if (hw
->fc
.requested_mode
== e1000_fc_full
) {
1508 hw
->fc
.current_mode
= e1000_fc_full
;
1509 DEBUGOUT("Flow Control = FULL.\r\n");
1511 hw
->fc
.current_mode
= e1000_fc_rx_pause
;
1512 DEBUGOUT("Flow Control = "
1513 "RX PAUSE frames only.\r\n");
1517 * For receiving PAUSE frames ONLY.
1519 * LOCAL DEVICE | LINK PARTNER
1520 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
1521 *-------|---------|-------|---------|--------------------
1522 * 0 | 1 | 1 | 1 | e1000_fc_tx_pause
1524 else if (!(mii_nway_adv_reg
& NWAY_AR_PAUSE
) &&
1525 (mii_nway_adv_reg
& NWAY_AR_ASM_DIR
) &&
1526 (mii_nway_lp_ability_reg
& NWAY_LPAR_PAUSE
) &&
1527 (mii_nway_lp_ability_reg
& NWAY_LPAR_ASM_DIR
)) {
1528 hw
->fc
.current_mode
= e1000_fc_tx_pause
;
1529 DEBUGOUT("Flow Control = TX PAUSE frames only.\r\n");
1532 * For transmitting PAUSE frames ONLY.
1534 * LOCAL DEVICE | LINK PARTNER
1535 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
1536 *-------|---------|-------|---------|--------------------
1537 * 1 | 1 | 0 | 1 | e1000_fc_rx_pause
1539 else if ((mii_nway_adv_reg
& NWAY_AR_PAUSE
) &&
1540 (mii_nway_adv_reg
& NWAY_AR_ASM_DIR
) &&
1541 !(mii_nway_lp_ability_reg
& NWAY_LPAR_PAUSE
) &&
1542 (mii_nway_lp_ability_reg
& NWAY_LPAR_ASM_DIR
)) {
1543 hw
->fc
.current_mode
= e1000_fc_rx_pause
;
1544 DEBUGOUT("Flow Control = RX PAUSE frames only.\r\n");
1547 * Per the IEEE spec, at this point flow control
1548 * should be disabled.
1550 hw
->fc
.current_mode
= e1000_fc_none
;
1551 DEBUGOUT("Flow Control = NONE.\r\n");
1555 * Now we need to do one last check... If we auto-
1556 * negotiated to HALF DUPLEX, flow control should not be
1557 * enabled per IEEE 802.3 spec.
1559 ret_val
= mac
->ops
.get_link_up_info(hw
, &speed
, &duplex
);
1561 DEBUGOUT("Error getting link speed and duplex\n");
1565 if (duplex
== HALF_DUPLEX
)
1566 hw
->fc
.current_mode
= e1000_fc_none
;
1569 * Now we call a subroutine to actually force the MAC
1570 * controller to use the correct flow control settings.
1572 ret_val
= e1000_force_mac_fc_generic(hw
);
1574 DEBUGOUT("Error forcing flow control settings\n");
1584 * e1000_get_speed_and_duplex_copper_generic - Retrieve current speed/duplex
1585 * @hw: pointer to the HW structure
1586 * @speed: stores the current speed
1587 * @duplex: stores the current duplex
1589 * Read the status register for the current speed/duplex and store the current
1590 * speed and duplex for copper connections.
1592 s32
e1000_get_speed_and_duplex_copper_generic(struct e1000_hw
*hw
, u16
*speed
,
1597 DEBUGFUNC("e1000_get_speed_and_duplex_copper_generic");
1599 status
= E1000_READ_REG(hw
, E1000_STATUS
);
1600 if (status
& E1000_STATUS_SPEED_1000
) {
1601 *speed
= SPEED_1000
;
1602 DEBUGOUT("1000 Mbs, ");
1603 } else if (status
& E1000_STATUS_SPEED_100
) {
1605 DEBUGOUT("100 Mbs, ");
1608 DEBUGOUT("10 Mbs, ");
1611 if (status
& E1000_STATUS_FD
) {
1612 *duplex
= FULL_DUPLEX
;
1613 DEBUGOUT("Full Duplex\n");
1615 *duplex
= HALF_DUPLEX
;
1616 DEBUGOUT("Half Duplex\n");
1619 return E1000_SUCCESS
;
1623 * e1000_get_speed_and_duplex_fiber_generic - Retrieve current speed/duplex
1624 * @hw: pointer to the HW structure
1625 * @speed: stores the current speed
1626 * @duplex: stores the current duplex
1628 * Sets the speed and duplex to gigabit full duplex (the only possible option)
1629 * for fiber/serdes links.
1631 s32
e1000_get_speed_and_duplex_fiber_serdes_generic(struct e1000_hw
*hw
,
1632 u16
*speed
, u16
*duplex
)
1634 DEBUGFUNC("e1000_get_speed_and_duplex_fiber_serdes_generic");
1636 *speed
= SPEED_1000
;
1637 *duplex
= FULL_DUPLEX
;
1639 return E1000_SUCCESS
;
1643 * e1000_get_hw_semaphore_generic - Acquire hardware semaphore
1644 * @hw: pointer to the HW structure
1646 * Acquire the HW semaphore to access the PHY or NVM
1648 s32
e1000_get_hw_semaphore_generic(struct e1000_hw
*hw
)
1651 s32 ret_val
= E1000_SUCCESS
;
1652 s32 timeout
= hw
->nvm
.word_size
+ 1;
1655 DEBUGFUNC("e1000_get_hw_semaphore_generic");
1657 /* Get the SW semaphore */
1658 while (i
< timeout
) {
1659 swsm
= E1000_READ_REG(hw
, E1000_SWSM
);
1660 if (!(swsm
& E1000_SWSM_SMBI
))
1668 DEBUGOUT("Driver can't access device - SMBI bit is set.\n");
1669 ret_val
= -E1000_ERR_NVM
;
1673 /* Get the FW semaphore. */
1674 for (i
= 0; i
< timeout
; i
++) {
1675 swsm
= E1000_READ_REG(hw
, E1000_SWSM
);
1676 E1000_WRITE_REG(hw
, E1000_SWSM
, swsm
| E1000_SWSM_SWESMBI
);
1678 /* Semaphore acquired if bit latched */
1679 if (E1000_READ_REG(hw
, E1000_SWSM
) & E1000_SWSM_SWESMBI
)
1686 /* Release semaphores */
1687 e1000_put_hw_semaphore_generic(hw
);
1688 DEBUGOUT("Driver can't access the NVM\n");
1689 ret_val
= -E1000_ERR_NVM
;
1698 * e1000_put_hw_semaphore_generic - Release hardware semaphore
1699 * @hw: pointer to the HW structure
1701 * Release hardware semaphore used to access the PHY or NVM
1703 void e1000_put_hw_semaphore_generic(struct e1000_hw
*hw
)
1707 DEBUGFUNC("e1000_put_hw_semaphore_generic");
1709 swsm
= E1000_READ_REG(hw
, E1000_SWSM
);
1711 swsm
&= ~(E1000_SWSM_SMBI
| E1000_SWSM_SWESMBI
);
1713 E1000_WRITE_REG(hw
, E1000_SWSM
, swsm
);
1717 * e1000_get_auto_rd_done_generic - Check for auto read completion
1718 * @hw: pointer to the HW structure
1720 * Check EEPROM for Auto Read done bit.
1722 s32
e1000_get_auto_rd_done_generic(struct e1000_hw
*hw
)
1725 s32 ret_val
= E1000_SUCCESS
;
1727 DEBUGFUNC("e1000_get_auto_rd_done_generic");
1729 while (i
< AUTO_READ_DONE_TIMEOUT
) {
1730 if (E1000_READ_REG(hw
, E1000_EECD
) & E1000_EECD_AUTO_RD
)
1736 if (i
== AUTO_READ_DONE_TIMEOUT
) {
1737 DEBUGOUT("Auto read by HW from NVM has not completed.\n");
1738 ret_val
= -E1000_ERR_RESET
;
1747 * e1000_valid_led_default_generic - Verify a valid default LED config
1748 * @hw: pointer to the HW structure
1749 * @data: pointer to the NVM (EEPROM)
1751 * Read the EEPROM for the current default LED configuration. If the
1752 * LED configuration is not valid, set to a valid LED configuration.
1754 s32
e1000_valid_led_default_generic(struct e1000_hw
*hw
, u16
*data
)
1758 DEBUGFUNC("e1000_valid_led_default_generic");
1760 ret_val
= hw
->nvm
.ops
.read(hw
, NVM_ID_LED_SETTINGS
, 1, data
);
1762 DEBUGOUT("NVM Read Error\n");
1766 if (*data
== ID_LED_RESERVED_0000
|| *data
== ID_LED_RESERVED_FFFF
)
1767 *data
= ID_LED_DEFAULT
;
1774 * e1000_id_led_init_generic -
1775 * @hw: pointer to the HW structure
1778 s32
e1000_id_led_init_generic(struct e1000_hw
*hw
)
1780 struct e1000_mac_info
*mac
= &hw
->mac
;
1782 const u32 ledctl_mask
= 0x000000FF;
1783 const u32 ledctl_on
= E1000_LEDCTL_MODE_LED_ON
;
1784 const u32 ledctl_off
= E1000_LEDCTL_MODE_LED_OFF
;
1786 const u16 led_mask
= 0x0F;
1788 DEBUGFUNC("e1000_id_led_init_generic");
1790 ret_val
= hw
->nvm
.ops
.valid_led_default(hw
, &data
);
1794 mac
->ledctl_default
= E1000_READ_REG(hw
, E1000_LEDCTL
);
1795 mac
->ledctl_mode1
= mac
->ledctl_default
;
1796 mac
->ledctl_mode2
= mac
->ledctl_default
;
1798 for (i
= 0; i
< 4; i
++) {
1799 temp
= (data
>> (i
<< 2)) & led_mask
;
1801 case ID_LED_ON1_DEF2
:
1802 case ID_LED_ON1_ON2
:
1803 case ID_LED_ON1_OFF2
:
1804 mac
->ledctl_mode1
&= ~(ledctl_mask
<< (i
<< 3));
1805 mac
->ledctl_mode1
|= ledctl_on
<< (i
<< 3);
1807 case ID_LED_OFF1_DEF2
:
1808 case ID_LED_OFF1_ON2
:
1809 case ID_LED_OFF1_OFF2
:
1810 mac
->ledctl_mode1
&= ~(ledctl_mask
<< (i
<< 3));
1811 mac
->ledctl_mode1
|= ledctl_off
<< (i
<< 3);
1818 case ID_LED_DEF1_ON2
:
1819 case ID_LED_ON1_ON2
:
1820 case ID_LED_OFF1_ON2
:
1821 mac
->ledctl_mode2
&= ~(ledctl_mask
<< (i
<< 3));
1822 mac
->ledctl_mode2
|= ledctl_on
<< (i
<< 3);
1824 case ID_LED_DEF1_OFF2
:
1825 case ID_LED_ON1_OFF2
:
1826 case ID_LED_OFF1_OFF2
:
1827 mac
->ledctl_mode2
&= ~(ledctl_mask
<< (i
<< 3));
1828 mac
->ledctl_mode2
|= ledctl_off
<< (i
<< 3);
1841 * e1000_setup_led_generic - Configures SW controllable LED
1842 * @hw: pointer to the HW structure
1844 * This prepares the SW controllable LED for use and saves the current state
1845 * of the LED so it can be later restored.
1847 s32
e1000_setup_led_generic(struct e1000_hw
*hw
)
1850 s32 ret_val
= E1000_SUCCESS
;
1852 DEBUGFUNC("e1000_setup_led_generic");
1854 if (hw
->mac
.ops
.setup_led
!= e1000_setup_led_generic
) {
1855 ret_val
= -E1000_ERR_CONFIG
;
1859 if (hw
->phy
.media_type
== e1000_media_type_fiber
) {
1860 ledctl
= E1000_READ_REG(hw
, E1000_LEDCTL
);
1861 hw
->mac
.ledctl_default
= ledctl
;
1863 ledctl
&= ~(E1000_LEDCTL_LED0_IVRT
|
1864 E1000_LEDCTL_LED0_BLINK
|
1865 E1000_LEDCTL_LED0_MODE_MASK
);
1866 ledctl
|= (E1000_LEDCTL_MODE_LED_OFF
<<
1867 E1000_LEDCTL_LED0_MODE_SHIFT
);
1868 E1000_WRITE_REG(hw
, E1000_LEDCTL
, ledctl
);
1869 } else if (hw
->phy
.media_type
== e1000_media_type_copper
) {
1870 E1000_WRITE_REG(hw
, E1000_LEDCTL
, hw
->mac
.ledctl_mode1
);
1878 * e1000_cleanup_led_generic - Set LED config to default operation
1879 * @hw: pointer to the HW structure
1881 * Remove the current LED configuration and set the LED configuration
1882 * to the default value, saved from the EEPROM.
1884 s32
e1000_cleanup_led_generic(struct e1000_hw
*hw
)
1886 s32 ret_val
= E1000_SUCCESS
;
1888 DEBUGFUNC("e1000_cleanup_led_generic");
1890 if (hw
->mac
.ops
.cleanup_led
!= e1000_cleanup_led_generic
) {
1891 ret_val
= -E1000_ERR_CONFIG
;
1895 E1000_WRITE_REG(hw
, E1000_LEDCTL
, hw
->mac
.ledctl_default
);
1902 * e1000_blink_led_generic - Blink LED
1903 * @hw: pointer to the HW structure
1905 * Blink the LEDs which are set to be on.
1907 s32
e1000_blink_led_generic(struct e1000_hw
*hw
)
1909 u32 ledctl_blink
= 0;
1912 DEBUGFUNC("e1000_blink_led_generic");
1914 if (hw
->phy
.media_type
== e1000_media_type_fiber
) {
1915 /* always blink LED0 for PCI-E fiber */
1916 ledctl_blink
= E1000_LEDCTL_LED0_BLINK
|
1917 (E1000_LEDCTL_MODE_LED_ON
<< E1000_LEDCTL_LED0_MODE_SHIFT
);
1920 * set the blink bit for each LED that's "on" (0x0E)
1923 ledctl_blink
= hw
->mac
.ledctl_mode2
;
1924 for (i
= 0; i
< 4; i
++)
1925 if (((hw
->mac
.ledctl_mode2
>> (i
* 8)) & 0xFF) ==
1926 E1000_LEDCTL_MODE_LED_ON
)
1927 ledctl_blink
|= (E1000_LEDCTL_LED0_BLINK
<<
1931 E1000_WRITE_REG(hw
, E1000_LEDCTL
, ledctl_blink
);
1933 return E1000_SUCCESS
;
1937 * e1000_led_on_generic - Turn LED on
1938 * @hw: pointer to the HW structure
1942 s32
e1000_led_on_generic(struct e1000_hw
*hw
)
1946 DEBUGFUNC("e1000_led_on_generic");
1948 switch (hw
->phy
.media_type
) {
1949 case e1000_media_type_fiber
:
1950 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
1951 ctrl
&= ~E1000_CTRL_SWDPIN0
;
1952 ctrl
|= E1000_CTRL_SWDPIO0
;
1953 E1000_WRITE_REG(hw
, E1000_CTRL
, ctrl
);
1955 case e1000_media_type_copper
:
1956 E1000_WRITE_REG(hw
, E1000_LEDCTL
, hw
->mac
.ledctl_mode2
);
1962 return E1000_SUCCESS
;
1966 * e1000_led_off_generic - Turn LED off
1967 * @hw: pointer to the HW structure
1971 s32
e1000_led_off_generic(struct e1000_hw
*hw
)
1975 DEBUGFUNC("e1000_led_off_generic");
1977 switch (hw
->phy
.media_type
) {
1978 case e1000_media_type_fiber
:
1979 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
1980 ctrl
|= E1000_CTRL_SWDPIN0
;
1981 ctrl
|= E1000_CTRL_SWDPIO0
;
1982 E1000_WRITE_REG(hw
, E1000_CTRL
, ctrl
);
1984 case e1000_media_type_copper
:
1985 E1000_WRITE_REG(hw
, E1000_LEDCTL
, hw
->mac
.ledctl_mode1
);
1991 return E1000_SUCCESS
;
1995 * e1000_set_pcie_no_snoop_generic - Set PCI-express capabilities
1996 * @hw: pointer to the HW structure
1997 * @no_snoop: bitmap of snoop events
1999 * Set the PCI-express register to snoop for events enabled in 'no_snoop'.
2001 void e1000_set_pcie_no_snoop_generic(struct e1000_hw
*hw
, u32 no_snoop
)
2005 DEBUGFUNC("e1000_set_pcie_no_snoop_generic");
2007 if (hw
->bus
.type
!= e1000_bus_type_pci_express
)
2011 gcr
= E1000_READ_REG(hw
, E1000_GCR
);
2012 gcr
&= ~(PCIE_NO_SNOOP_ALL
);
2014 E1000_WRITE_REG(hw
, E1000_GCR
, gcr
);
2021 * e1000_disable_pcie_master_generic - Disables PCI-express master access
2022 * @hw: pointer to the HW structure
2024 * Returns 0 (E1000_SUCCESS) if successful, else returns -10
2025 * (-E1000_ERR_MASTER_REQUESTS_PENDING) if master disable bit has not caused
2026 * the master requests to be disabled.
2028 * Disables PCI-Express master access and verifies there are no pending
2031 s32
e1000_disable_pcie_master_generic(struct e1000_hw
*hw
)
2034 s32 timeout
= MASTER_DISABLE_TIMEOUT
;
2035 s32 ret_val
= E1000_SUCCESS
;
2037 DEBUGFUNC("e1000_disable_pcie_master_generic");
2039 if (hw
->bus
.type
!= e1000_bus_type_pci_express
)
2042 ctrl
= E1000_READ_REG(hw
, E1000_CTRL
);
2043 ctrl
|= E1000_CTRL_GIO_MASTER_DISABLE
;
2044 E1000_WRITE_REG(hw
, E1000_CTRL
, ctrl
);
2047 if (!(E1000_READ_REG(hw
, E1000_STATUS
) &
2048 E1000_STATUS_GIO_MASTER_ENABLE
))
2055 DEBUGOUT("Master requests are pending.\n");
2056 ret_val
= -E1000_ERR_MASTER_REQUESTS_PENDING
;
2065 * e1000_reset_adaptive_generic - Reset Adaptive Interframe Spacing
2066 * @hw: pointer to the HW structure
2068 * Reset the Adaptive Interframe Spacing throttle to default values.
2070 void e1000_reset_adaptive_generic(struct e1000_hw
*hw
)
2072 struct e1000_mac_info
*mac
= &hw
->mac
;
2074 DEBUGFUNC("e1000_reset_adaptive_generic");
2076 if (!mac
->adaptive_ifs
) {
2077 DEBUGOUT("Not in Adaptive IFS mode!\n");
2081 mac
->current_ifs_val
= 0;
2082 mac
->ifs_min_val
= IFS_MIN
;
2083 mac
->ifs_max_val
= IFS_MAX
;
2084 mac
->ifs_step_size
= IFS_STEP
;
2085 mac
->ifs_ratio
= IFS_RATIO
;
2087 mac
->in_ifs_mode
= false;
2088 E1000_WRITE_REG(hw
, E1000_AIT
, 0);
2094 * e1000_update_adaptive_generic - Update Adaptive Interframe Spacing
2095 * @hw: pointer to the HW structure
2097 * Update the Adaptive Interframe Spacing Throttle value based on the
2098 * time between transmitted packets and time between collisions.
2100 void e1000_update_adaptive_generic(struct e1000_hw
*hw
)
2102 struct e1000_mac_info
*mac
= &hw
->mac
;
2104 DEBUGFUNC("e1000_update_adaptive_generic");
2106 if (!mac
->adaptive_ifs
) {
2107 DEBUGOUT("Not in Adaptive IFS mode!\n");
2111 if ((mac
->collision_delta
* mac
->ifs_ratio
) > mac
->tx_packet_delta
) {
2112 if (mac
->tx_packet_delta
> MIN_NUM_XMITS
) {
2113 mac
->in_ifs_mode
= true;
2114 if (mac
->current_ifs_val
< mac
->ifs_max_val
) {
2115 if (!mac
->current_ifs_val
)
2116 mac
->current_ifs_val
= mac
->ifs_min_val
;
2118 mac
->current_ifs_val
+=
2120 E1000_WRITE_REG(hw
, E1000_AIT
, mac
->current_ifs_val
);
2124 if (mac
->in_ifs_mode
&&
2125 (mac
->tx_packet_delta
<= MIN_NUM_XMITS
)) {
2126 mac
->current_ifs_val
= 0;
2127 mac
->in_ifs_mode
= false;
2128 E1000_WRITE_REG(hw
, E1000_AIT
, 0);
2136 * e1000_validate_mdi_setting_generic - Verify MDI/MDIx settings
2137 * @hw: pointer to the HW structure
2139 * Verify that when not using auto-negotiation that MDI/MDIx is correctly
2140 * set, which is forced to MDI mode only.
2142 s32
e1000_validate_mdi_setting_generic(struct e1000_hw
*hw
)
2144 s32 ret_val
= E1000_SUCCESS
;
2146 DEBUGFUNC("e1000_validate_mdi_setting_generic");
2148 if (!hw
->mac
.autoneg
&& (hw
->phy
.mdix
== 0 || hw
->phy
.mdix
== 3)) {
2149 DEBUGOUT("Invalid MDI setting detected\n");
2151 ret_val
= -E1000_ERR_CONFIG
;