1 /*******************************************************************************
3 Intel PRO/10GbE 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 *******************************************************************************/
30 * Shared functions for accessing and configuring the adapter
33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38 #include <linux/etherdevice.h>
40 /* Local function prototypes */
42 static u32 ixgb_hash_mc_addr(struct ixgb_hw *hw, u8 * mc_addr);
44 static void ixgb_mta_set(struct ixgb_hw *hw, u32 hash_value);
46 static void ixgb_get_bus_info(struct ixgb_hw *hw);
48 static bool ixgb_link_reset(struct ixgb_hw *hw);
50 static void ixgb_optics_reset(struct ixgb_hw *hw);
52 static void ixgb_optics_reset_bcm(struct ixgb_hw *hw);
54 static ixgb_phy_type ixgb_identify_phy(struct ixgb_hw *hw);
56 static void ixgb_clear_hw_cntrs(struct ixgb_hw *hw);
58 static void ixgb_clear_vfta(struct ixgb_hw *hw);
60 static void ixgb_init_rx_addrs(struct ixgb_hw *hw);
62 static u16 ixgb_read_phy_reg(struct ixgb_hw *hw,
67 static bool ixgb_setup_fc(struct ixgb_hw *hw);
69 static bool mac_addr_valid(u8 *mac_addr);
71 static u32 ixgb_mac_reset(struct ixgb_hw *hw)
75 ctrl_reg = IXGB_CTRL0_RST |
76 IXGB_CTRL0_SDP3_DIR | /* All pins are Output=1 */
80 IXGB_CTRL0_SDP3 | /* Initial value 1101 */
85 /* Workaround for 82597EX reset errata */
86 IXGB_WRITE_REG_IO(hw, CTRL0, ctrl_reg);
88 IXGB_WRITE_REG(hw, CTRL0, ctrl_reg);
91 /* Delay a few ms just to allow the reset to complete */
92 msleep(IXGB_DELAY_AFTER_RESET);
93 ctrl_reg = IXGB_READ_REG(hw, CTRL0);
95 /* Make sure the self-clearing global reset bit did self clear */
96 ASSERT(!(ctrl_reg & IXGB_CTRL0_RST));
99 if (hw->subsystem_vendor_id == SUN_SUBVENDOR_ID) {
100 ctrl_reg = /* Enable interrupt from XFP and SerDes */
102 IXGB_CTRL1_SDP6_DIR |
103 IXGB_CTRL1_SDP7_DIR |
106 IXGB_WRITE_REG(hw, CTRL1, ctrl_reg);
107 ixgb_optics_reset_bcm(hw);
110 if (hw->phy_type == ixgb_phy_type_txn17401)
111 ixgb_optics_reset(hw);
116 /******************************************************************************
117 * Reset the transmit and receive units; mask and clear all interrupts.
119 * hw - Struct containing variables accessed by shared code
120 *****************************************************************************/
122 ixgb_adapter_stop(struct ixgb_hw *hw)
129 /* If we are stopped or resetting exit gracefully and wait to be
130 * started again before accessing the hardware.
132 if (hw->adapter_stopped) {
133 pr_debug("Exiting because the adapter is already stopped!!!\n");
137 /* Set the Adapter Stopped flag so other driver functions stop
138 * touching the Hardware.
140 hw->adapter_stopped = true;
142 /* Clear interrupt mask to stop board from generating interrupts */
143 pr_debug("Masking off all interrupts\n");
144 IXGB_WRITE_REG(hw, IMC, 0xFFFFFFFF);
146 /* Disable the Transmit and Receive units. Then delay to allow
147 * any pending transactions to complete before we hit the MAC with
150 IXGB_WRITE_REG(hw, RCTL, IXGB_READ_REG(hw, RCTL) & ~IXGB_RCTL_RXEN);
151 IXGB_WRITE_REG(hw, TCTL, IXGB_READ_REG(hw, TCTL) & ~IXGB_TCTL_TXEN);
152 msleep(IXGB_DELAY_BEFORE_RESET);
154 /* Issue a global reset to the MAC. This will reset the chip's
155 * transmit, receive, DMA, and link units. It will not effect
156 * the current PCI configuration. The global reset bit is self-
157 * clearing, and should clear within a microsecond.
159 pr_debug("Issuing a global reset to MAC\n");
161 ctrl_reg = ixgb_mac_reset(hw);
163 /* Clear interrupt mask to stop board from generating interrupts */
164 pr_debug("Masking off all interrupts\n");
165 IXGB_WRITE_REG(hw, IMC, 0xffffffff);
167 /* Clear any pending interrupt events. */
168 icr_reg = IXGB_READ_REG(hw, ICR);
170 return (ctrl_reg & IXGB_CTRL0_RST);
174 /******************************************************************************
175 * Identifies the vendor of the optics module on the adapter. The SR adapters
176 * support two different types of XPAK optics, so it is necessary to determine
177 * which optics are present before applying any optics-specific workarounds.
179 * hw - Struct containing variables accessed by shared code.
181 * Returns: the vendor of the XPAK optics module.
182 *****************************************************************************/
183 static ixgb_xpak_vendor
184 ixgb_identify_xpak_vendor(struct ixgb_hw *hw)
188 ixgb_xpak_vendor xpak_vendor;
192 /* Read the first few bytes of the vendor string from the XPAK NVR
193 * registers. These are standard XENPAK/XPAK registers, so all XPAK
194 * devices should implement them. */
195 for (i = 0; i < 5; i++) {
196 vendor_name[i] = ixgb_read_phy_reg(hw,
197 MDIO_PMA_PMD_XPAK_VENDOR_NAME
198 + i, IXGB_PHY_ADDRESS,
202 /* Determine the actual vendor */
203 if (vendor_name[0] == 'I' &&
204 vendor_name[1] == 'N' &&
205 vendor_name[2] == 'T' &&
206 vendor_name[3] == 'E' && vendor_name[4] == 'L') {
207 xpak_vendor = ixgb_xpak_vendor_intel;
209 xpak_vendor = ixgb_xpak_vendor_infineon;
212 return (xpak_vendor);
215 /******************************************************************************
216 * Determine the physical layer module on the adapter.
218 * hw - Struct containing variables accessed by shared code. The device_id
219 * field must be (correctly) populated before calling this routine.
221 * Returns: the phy type of the adapter.
222 *****************************************************************************/
224 ixgb_identify_phy(struct ixgb_hw *hw)
226 ixgb_phy_type phy_type;
227 ixgb_xpak_vendor xpak_vendor;
231 /* Infer the transceiver/phy type from the device id */
232 switch (hw->device_id) {
233 case IXGB_DEVICE_ID_82597EX:
234 pr_debug("Identified TXN17401 optics\n");
235 phy_type = ixgb_phy_type_txn17401;
238 case IXGB_DEVICE_ID_82597EX_SR:
239 /* The SR adapters carry two different types of XPAK optics
240 * modules; read the vendor identifier to determine the exact
242 xpak_vendor = ixgb_identify_xpak_vendor(hw);
243 if (xpak_vendor == ixgb_xpak_vendor_intel) {
244 pr_debug("Identified TXN17201 optics\n");
245 phy_type = ixgb_phy_type_txn17201;
247 pr_debug("Identified G6005 optics\n");
248 phy_type = ixgb_phy_type_g6005;
251 case IXGB_DEVICE_ID_82597EX_LR:
252 pr_debug("Identified G6104 optics\n");
253 phy_type = ixgb_phy_type_g6104;
255 case IXGB_DEVICE_ID_82597EX_CX4:
256 pr_debug("Identified CX4\n");
257 xpak_vendor = ixgb_identify_xpak_vendor(hw);
258 if (xpak_vendor == ixgb_xpak_vendor_intel) {
259 pr_debug("Identified TXN17201 optics\n");
260 phy_type = ixgb_phy_type_txn17201;
262 pr_debug("Identified G6005 optics\n");
263 phy_type = ixgb_phy_type_g6005;
267 pr_debug("Unknown physical layer module\n");
268 phy_type = ixgb_phy_type_unknown;
272 /* update phy type for sun specific board */
273 if (hw->subsystem_vendor_id == SUN_SUBVENDOR_ID)
274 phy_type = ixgb_phy_type_bcm;
279 /******************************************************************************
280 * Performs basic configuration of the adapter.
282 * hw - Struct containing variables accessed by shared code
284 * Resets the controller.
285 * Reads and validates the EEPROM.
286 * Initializes the receive address registers.
287 * Initializes the multicast table.
288 * Clears all on-chip counters.
289 * Calls routine to setup flow control settings.
290 * Leaves the transmit and receive units disabled and uninitialized.
293 * true if successful,
294 * false if unrecoverable problems were encountered.
295 *****************************************************************************/
297 ixgb_init_hw(struct ixgb_hw *hw)
305 /* Issue a global reset to the MAC. This will reset the chip's
306 * transmit, receive, DMA, and link units. It will not effect
307 * the current PCI configuration. The global reset bit is self-
308 * clearing, and should clear within a microsecond.
310 pr_debug("Issuing a global reset to MAC\n");
312 ctrl_reg = ixgb_mac_reset(hw);
314 pr_debug("Issuing an EE reset to MAC\n");
316 /* Workaround for 82597EX reset errata */
317 IXGB_WRITE_REG_IO(hw, CTRL1, IXGB_CTRL1_EE_RST);
319 IXGB_WRITE_REG(hw, CTRL1, IXGB_CTRL1_EE_RST);
322 /* Delay a few ms just to allow the reset to complete */
323 msleep(IXGB_DELAY_AFTER_EE_RESET);
325 if (!ixgb_get_eeprom_data(hw))
328 /* Use the device id to determine the type of phy/transceiver. */
329 hw->device_id = ixgb_get_ee_device_id(hw);
330 hw->phy_type = ixgb_identify_phy(hw);
332 /* Setup the receive addresses.
333 * Receive Address Registers (RARs 0 - 15).
335 ixgb_init_rx_addrs(hw);
338 * Check that a valid MAC address has been set.
339 * If it is not valid, we fail hardware init.
341 if (!mac_addr_valid(hw->curr_mac_addr)) {
342 pr_debug("MAC address invalid after ixgb_init_rx_addrs\n");
346 /* tell the routines in this file they can access hardware again */
347 hw->adapter_stopped = false;
349 /* Fill in the bus_info structure */
350 ixgb_get_bus_info(hw);
352 /* Zero out the Multicast HASH table */
353 pr_debug("Zeroing the MTA\n");
354 for (i = 0; i < IXGB_MC_TBL_SIZE; i++)
355 IXGB_WRITE_REG_ARRAY(hw, MTA, i, 0);
357 /* Zero out the VLAN Filter Table Array */
360 /* Zero all of the hardware counters */
361 ixgb_clear_hw_cntrs(hw);
363 /* Call a subroutine to setup flow control. */
364 status = ixgb_setup_fc(hw);
366 /* 82597EX errata: Call check-for-link in case lane deskew is locked */
367 ixgb_check_for_link(hw);
372 /******************************************************************************
373 * Initializes receive address filters.
375 * hw - Struct containing variables accessed by shared code
377 * Places the MAC address in receive address register 0 and clears the rest
378 * of the receive address registers. Clears the multicast table. Assumes
379 * the receiver is in reset when the routine is called.
380 *****************************************************************************/
382 ixgb_init_rx_addrs(struct ixgb_hw *hw)
389 * If the current mac address is valid, assume it is a software override
390 * to the permanent address.
391 * Otherwise, use the permanent address from the eeprom.
393 if (!mac_addr_valid(hw->curr_mac_addr)) {
395 /* Get the MAC address from the eeprom for later reference */
396 ixgb_get_ee_mac_addr(hw, hw->curr_mac_addr);
398 pr_debug("Keeping Permanent MAC Addr = %pM\n",
402 /* Setup the receive address. */
403 pr_debug("Overriding MAC Address in RAR[0]\n");
404 pr_debug("New MAC Addr = %pM\n", hw->curr_mac_addr);
406 ixgb_rar_set(hw, hw->curr_mac_addr, 0);
409 /* Zero out the other 15 receive addresses. */
410 pr_debug("Clearing RAR[1-15]\n");
411 for (i = 1; i < IXGB_RAR_ENTRIES; i++) {
412 /* Write high reg first to disable the AV bit first */
413 IXGB_WRITE_REG_ARRAY(hw, RA, ((i << 1) + 1), 0);
414 IXGB_WRITE_REG_ARRAY(hw, RA, (i << 1), 0);
420 /******************************************************************************
421 * Updates the MAC's list of multicast addresses.
423 * hw - Struct containing variables accessed by shared code
424 * mc_addr_list - the list of new multicast addresses
425 * mc_addr_count - number of addresses
426 * pad - number of bytes between addresses in the list
428 * The given list replaces any existing list. Clears the last 15 receive
429 * address registers and the multicast table. Uses receive address registers
430 * for the first 15 multicast addresses, and hashes the rest into the
432 *****************************************************************************/
434 ixgb_mc_addr_list_update(struct ixgb_hw *hw,
441 u32 rar_used_count = 1; /* RAR[0] is used for our MAC address */
446 /* Set the new number of MC addresses that we are being requested to use. */
447 hw->num_mc_addrs = mc_addr_count;
449 /* Clear RAR[1-15] */
450 pr_debug("Clearing RAR[1-15]\n");
451 for (i = rar_used_count; i < IXGB_RAR_ENTRIES; i++) {
452 IXGB_WRITE_REG_ARRAY(hw, RA, (i << 1), 0);
453 IXGB_WRITE_REG_ARRAY(hw, RA, ((i << 1) + 1), 0);
457 pr_debug("Clearing MTA\n");
458 for (i = 0; i < IXGB_MC_TBL_SIZE; i++)
459 IXGB_WRITE_REG_ARRAY(hw, MTA, i, 0);
461 /* Add the new addresses */
463 for (i = 0; i < mc_addr_count; i++) {
464 pr_debug("Adding the multicast addresses:\n");
465 pr_debug("MC Addr #%d = %pM\n", i, mca);
467 /* Place this multicast address in the RAR if there is room, *
468 * else put it in the MTA
470 if (rar_used_count < IXGB_RAR_ENTRIES) {
471 ixgb_rar_set(hw, mca, rar_used_count);
472 pr_debug("Added a multicast address to RAR[%d]\n", i);
475 hash_value = ixgb_hash_mc_addr(hw, mca);
477 pr_debug("Hash value = 0x%03X\n", hash_value);
479 ixgb_mta_set(hw, hash_value);
482 mca += IXGB_ETH_LENGTH_OF_ADDRESS + pad;
485 pr_debug("MC Update Complete\n");
489 /******************************************************************************
490 * Hashes an address to determine its location in the multicast table
492 * hw - Struct containing variables accessed by shared code
493 * mc_addr - the multicast address to hash
497 *****************************************************************************/
499 ixgb_hash_mc_addr(struct ixgb_hw *hw,
506 /* The portion of the address that is used for the hash table is
507 * determined by the mc_filter_type setting.
509 switch (hw->mc_filter_type) {
510 /* [0] [1] [2] [3] [4] [5]
512 * LSB MSB - According to H/W docs */
514 /* [47:36] i.e. 0x563 for above example address */
516 ((mc_addr[4] >> 4) | (((u16) mc_addr[5]) << 4));
518 case 1: /* [46:35] i.e. 0xAC6 for above example address */
520 ((mc_addr[4] >> 3) | (((u16) mc_addr[5]) << 5));
522 case 2: /* [45:34] i.e. 0x5D8 for above example address */
524 ((mc_addr[4] >> 2) | (((u16) mc_addr[5]) << 6));
526 case 3: /* [43:32] i.e. 0x634 for above example address */
527 hash_value = ((mc_addr[4]) | (((u16) mc_addr[5]) << 8));
530 /* Invalid mc_filter_type, what should we do? */
531 pr_debug("MC filter type param set incorrectly\n");
540 /******************************************************************************
541 * Sets the bit in the multicast table corresponding to the hash value.
543 * hw - Struct containing variables accessed by shared code
544 * hash_value - Multicast address hash value
545 *****************************************************************************/
547 ixgb_mta_set(struct ixgb_hw *hw,
550 u32 hash_bit, hash_reg;
553 /* The MTA is a register array of 128 32-bit registers.
554 * It is treated like an array of 4096 bits. We want to set
555 * bit BitArray[hash_value]. So we figure out what register
556 * the bit is in, read it, OR in the new bit, then write
557 * back the new value. The register is determined by the
558 * upper 7 bits of the hash value and the bit within that
559 * register are determined by the lower 5 bits of the value.
561 hash_reg = (hash_value >> 5) & 0x7F;
562 hash_bit = hash_value & 0x1F;
564 mta_reg = IXGB_READ_REG_ARRAY(hw, MTA, hash_reg);
566 mta_reg |= (1 << hash_bit);
568 IXGB_WRITE_REG_ARRAY(hw, MTA, hash_reg, mta_reg);
573 /******************************************************************************
574 * Puts an ethernet address into a receive address register.
576 * hw - Struct containing variables accessed by shared code
577 * addr - Address to put into receive address register
578 * index - Receive address register to write
579 *****************************************************************************/
581 ixgb_rar_set(struct ixgb_hw *hw,
585 u32 rar_low, rar_high;
589 /* HW expects these in little endian so we reverse the byte order
590 * from network order (big endian) to little endian
592 rar_low = ((u32) addr[0] |
593 ((u32)addr[1] << 8) |
594 ((u32)addr[2] << 16) |
595 ((u32)addr[3] << 24));
597 rar_high = ((u32) addr[4] |
598 ((u32)addr[5] << 8) |
601 IXGB_WRITE_REG_ARRAY(hw, RA, (index << 1), rar_low);
602 IXGB_WRITE_REG_ARRAY(hw, RA, ((index << 1) + 1), rar_high);
606 /******************************************************************************
607 * Writes a value to the specified offset in the VLAN filter table.
609 * hw - Struct containing variables accessed by shared code
610 * offset - Offset in VLAN filer table to write
611 * value - Value to write into VLAN filter table
612 *****************************************************************************/
614 ixgb_write_vfta(struct ixgb_hw *hw,
618 IXGB_WRITE_REG_ARRAY(hw, VFTA, offset, value);
622 /******************************************************************************
623 * Clears the VLAN filer table
625 * hw - Struct containing variables accessed by shared code
626 *****************************************************************************/
628 ixgb_clear_vfta(struct ixgb_hw *hw)
632 for (offset = 0; offset < IXGB_VLAN_FILTER_TBL_SIZE; offset++)
633 IXGB_WRITE_REG_ARRAY(hw, VFTA, offset, 0);
637 /******************************************************************************
638 * Configures the flow control settings based on SW configuration.
640 * hw - Struct containing variables accessed by shared code
641 *****************************************************************************/
644 ixgb_setup_fc(struct ixgb_hw *hw)
647 u32 pap_reg = 0; /* by default, assume no pause time */
652 /* Get the current control reg 0 settings */
653 ctrl_reg = IXGB_READ_REG(hw, CTRL0);
655 /* Clear the Receive Pause Enable and Transmit Pause Enable bits */
656 ctrl_reg &= ~(IXGB_CTRL0_RPE | IXGB_CTRL0_TPE);
658 /* The possible values of the "flow_control" parameter are:
659 * 0: Flow control is completely disabled
660 * 1: Rx flow control is enabled (we can receive pause frames
661 * but not send pause frames).
662 * 2: Tx flow control is enabled (we can send pause frames
663 * but we do not support receiving pause frames).
664 * 3: Both Rx and TX flow control (symmetric) are enabled.
667 switch (hw->fc.type) {
668 case ixgb_fc_none: /* 0 */
669 /* Set CMDC bit to disable Rx Flow control */
670 ctrl_reg |= (IXGB_CTRL0_CMDC);
672 case ixgb_fc_rx_pause: /* 1 */
673 /* RX Flow control is enabled, and TX Flow control is
676 ctrl_reg |= (IXGB_CTRL0_RPE);
678 case ixgb_fc_tx_pause: /* 2 */
679 /* TX Flow control is enabled, and RX Flow control is
680 * disabled, by a software over-ride.
682 ctrl_reg |= (IXGB_CTRL0_TPE);
683 pap_reg = hw->fc.pause_time;
685 case ixgb_fc_full: /* 3 */
686 /* Flow control (both RX and TX) is enabled by a software
689 ctrl_reg |= (IXGB_CTRL0_RPE | IXGB_CTRL0_TPE);
690 pap_reg = hw->fc.pause_time;
693 /* We should never get here. The value should be 0-3. */
694 pr_debug("Flow control param set incorrectly\n");
699 /* Write the new settings */
700 IXGB_WRITE_REG(hw, CTRL0, ctrl_reg);
703 IXGB_WRITE_REG(hw, PAP, pap_reg);
705 /* Set the flow control receive threshold registers. Normally,
706 * these registers will be set to a default threshold that may be
707 * adjusted later by the driver's runtime code. However, if the
708 * ability to transmit pause frames in not enabled, then these
709 * registers will be set to 0.
711 if (!(hw->fc.type & ixgb_fc_tx_pause)) {
712 IXGB_WRITE_REG(hw, FCRTL, 0);
713 IXGB_WRITE_REG(hw, FCRTH, 0);
715 /* We need to set up the Receive Threshold high and low water
716 * marks as well as (optionally) enabling the transmission of XON
718 if (hw->fc.send_xon) {
719 IXGB_WRITE_REG(hw, FCRTL,
720 (hw->fc.low_water | IXGB_FCRTL_XONE));
722 IXGB_WRITE_REG(hw, FCRTL, hw->fc.low_water);
724 IXGB_WRITE_REG(hw, FCRTH, hw->fc.high_water);
729 /******************************************************************************
730 * Reads a word from a device over the Management Data Interface (MDI) bus.
731 * This interface is used to manage Physical layer devices.
733 * hw - Struct containing variables accessed by hw code
734 * reg_address - Offset of device register being read.
735 * phy_address - Address of device on MDI.
737 * Returns: Data word (16 bits) from MDI device.
739 * The 82597EX has support for several MDI access methods. This routine
740 * uses the new protocol MDI Single Command and Address Operation.
741 * This requires that first an address cycle command is sent, followed by a
743 *****************************************************************************/
745 ixgb_read_phy_reg(struct ixgb_hw *hw,
754 ASSERT(reg_address <= IXGB_MAX_PHY_REG_ADDRESS);
755 ASSERT(phy_address <= IXGB_MAX_PHY_ADDRESS);
756 ASSERT(device_type <= IXGB_MAX_PHY_DEV_TYPE);
758 /* Setup and write the address cycle command */
759 command = ((reg_address << IXGB_MSCA_NP_ADDR_SHIFT) |
760 (device_type << IXGB_MSCA_DEV_TYPE_SHIFT) |
761 (phy_address << IXGB_MSCA_PHY_ADDR_SHIFT) |
762 (IXGB_MSCA_ADDR_CYCLE | IXGB_MSCA_MDI_COMMAND));
764 IXGB_WRITE_REG(hw, MSCA, command);
766 /**************************************************************
767 ** Check every 10 usec to see if the address cycle completed
768 ** The COMMAND bit will clear when the operation is complete.
769 ** This may take as long as 64 usecs (we'll wait 100 usecs max)
770 ** from the CPU Write to the Ready bit assertion.
771 **************************************************************/
773 for (i = 0; i < 10; i++)
777 command = IXGB_READ_REG(hw, MSCA);
779 if ((command & IXGB_MSCA_MDI_COMMAND) == 0)
783 ASSERT((command & IXGB_MSCA_MDI_COMMAND) == 0);
785 /* Address cycle complete, setup and write the read command */
786 command = ((reg_address << IXGB_MSCA_NP_ADDR_SHIFT) |
787 (device_type << IXGB_MSCA_DEV_TYPE_SHIFT) |
788 (phy_address << IXGB_MSCA_PHY_ADDR_SHIFT) |
789 (IXGB_MSCA_READ | IXGB_MSCA_MDI_COMMAND));
791 IXGB_WRITE_REG(hw, MSCA, command);
793 /**************************************************************
794 ** Check every 10 usec to see if the read command completed
795 ** The COMMAND bit will clear when the operation is complete.
796 ** The read may take as long as 64 usecs (we'll wait 100 usecs max)
797 ** from the CPU Write to the Ready bit assertion.
798 **************************************************************/
800 for (i = 0; i < 10; i++)
804 command = IXGB_READ_REG(hw, MSCA);
806 if ((command & IXGB_MSCA_MDI_COMMAND) == 0)
810 ASSERT((command & IXGB_MSCA_MDI_COMMAND) == 0);
812 /* Operation is complete, get the data from the MDIO Read/Write Data
813 * register and return.
815 data = IXGB_READ_REG(hw, MSRWD);
816 data >>= IXGB_MSRWD_READ_DATA_SHIFT;
820 /******************************************************************************
821 * Writes a word to a device over the Management Data Interface (MDI) bus.
822 * This interface is used to manage Physical layer devices.
824 * hw - Struct containing variables accessed by hw code
825 * reg_address - Offset of device register being read.
826 * phy_address - Address of device on MDI.
827 * device_type - Also known as the Device ID or DID.
828 * data - 16-bit value to be written
832 * The 82597EX has support for several MDI access methods. This routine
833 * uses the new protocol MDI Single Command and Address Operation.
834 * This requires that first an address cycle command is sent, followed by a
836 *****************************************************************************/
838 ixgb_write_phy_reg(struct ixgb_hw *hw,
847 ASSERT(reg_address <= IXGB_MAX_PHY_REG_ADDRESS);
848 ASSERT(phy_address <= IXGB_MAX_PHY_ADDRESS);
849 ASSERT(device_type <= IXGB_MAX_PHY_DEV_TYPE);
851 /* Put the data in the MDIO Read/Write Data register */
852 IXGB_WRITE_REG(hw, MSRWD, (u32)data);
854 /* Setup and write the address cycle command */
855 command = ((reg_address << IXGB_MSCA_NP_ADDR_SHIFT) |
856 (device_type << IXGB_MSCA_DEV_TYPE_SHIFT) |
857 (phy_address << IXGB_MSCA_PHY_ADDR_SHIFT) |
858 (IXGB_MSCA_ADDR_CYCLE | IXGB_MSCA_MDI_COMMAND));
860 IXGB_WRITE_REG(hw, MSCA, command);
862 /**************************************************************
863 ** Check every 10 usec to see if the address cycle completed
864 ** The COMMAND bit will clear when the operation is complete.
865 ** This may take as long as 64 usecs (we'll wait 100 usecs max)
866 ** from the CPU Write to the Ready bit assertion.
867 **************************************************************/
869 for (i = 0; i < 10; i++)
873 command = IXGB_READ_REG(hw, MSCA);
875 if ((command & IXGB_MSCA_MDI_COMMAND) == 0)
879 ASSERT((command & IXGB_MSCA_MDI_COMMAND) == 0);
881 /* Address cycle complete, setup and write the write command */
882 command = ((reg_address << IXGB_MSCA_NP_ADDR_SHIFT) |
883 (device_type << IXGB_MSCA_DEV_TYPE_SHIFT) |
884 (phy_address << IXGB_MSCA_PHY_ADDR_SHIFT) |
885 (IXGB_MSCA_WRITE | IXGB_MSCA_MDI_COMMAND));
887 IXGB_WRITE_REG(hw, MSCA, command);
889 /**************************************************************
890 ** Check every 10 usec to see if the read command completed
891 ** The COMMAND bit will clear when the operation is complete.
892 ** The write may take as long as 64 usecs (we'll wait 100 usecs max)
893 ** from the CPU Write to the Ready bit assertion.
894 **************************************************************/
896 for (i = 0; i < 10; i++)
900 command = IXGB_READ_REG(hw, MSCA);
902 if ((command & IXGB_MSCA_MDI_COMMAND) == 0)
906 ASSERT((command & IXGB_MSCA_MDI_COMMAND) == 0);
908 /* Operation is complete, return. */
911 /******************************************************************************
912 * Checks to see if the link status of the hardware has changed.
914 * hw - Struct containing variables accessed by hw code
916 * Called by any function that needs to check the link status of the adapter.
917 *****************************************************************************/
919 ixgb_check_for_link(struct ixgb_hw *hw)
926 xpcss_reg = IXGB_READ_REG(hw, XPCSS);
927 status_reg = IXGB_READ_REG(hw, STATUS);
929 if ((xpcss_reg & IXGB_XPCSS_ALIGN_STATUS) &&
930 (status_reg & IXGB_STATUS_LU)) {
932 } else if (!(xpcss_reg & IXGB_XPCSS_ALIGN_STATUS) &&
933 (status_reg & IXGB_STATUS_LU)) {
934 pr_debug("XPCSS Not Aligned while Status:LU is set\n");
935 hw->link_up = ixgb_link_reset(hw);
938 * 82597EX errata. Since the lane deskew problem may prevent
939 * link, reset the link before reporting link down.
941 hw->link_up = ixgb_link_reset(hw);
943 /* Anything else for 10 Gig?? */
946 /******************************************************************************
947 * Check for a bad link condition that may have occurred.
948 * The indication is that the RFC / LFC registers may be incrementing
949 * continually. A full adapter reset is required to recover.
951 * hw - Struct containing variables accessed by hw code
953 * Called by any function that needs to check the link status of the adapter.
954 *****************************************************************************/
955 bool ixgb_check_for_bad_link(struct ixgb_hw *hw)
958 bool bad_link_returncode = false;
960 if (hw->phy_type == ixgb_phy_type_txn17401) {
961 newLFC = IXGB_READ_REG(hw, LFC);
962 newRFC = IXGB_READ_REG(hw, RFC);
963 if ((hw->lastLFC + 250 < newLFC)
964 || (hw->lastRFC + 250 < newRFC)) {
965 pr_debug("BAD LINK! too many LFC/RFC since last check\n");
966 bad_link_returncode = true;
968 hw->lastLFC = newLFC;
969 hw->lastRFC = newRFC;
972 return bad_link_returncode;
975 /******************************************************************************
976 * Clears all hardware statistics counters.
978 * hw - Struct containing variables accessed by shared code
979 *****************************************************************************/
981 ixgb_clear_hw_cntrs(struct ixgb_hw *hw)
983 volatile u32 temp_reg;
987 /* if we are stopped or resetting exit gracefully */
988 if (hw->adapter_stopped) {
989 pr_debug("Exiting because the adapter is stopped!!!\n");
993 temp_reg = IXGB_READ_REG(hw, TPRL);
994 temp_reg = IXGB_READ_REG(hw, TPRH);
995 temp_reg = IXGB_READ_REG(hw, GPRCL);
996 temp_reg = IXGB_READ_REG(hw, GPRCH);
997 temp_reg = IXGB_READ_REG(hw, BPRCL);
998 temp_reg = IXGB_READ_REG(hw, BPRCH);
999 temp_reg = IXGB_READ_REG(hw, MPRCL);
1000 temp_reg = IXGB_READ_REG(hw, MPRCH);
1001 temp_reg = IXGB_READ_REG(hw, UPRCL);
1002 temp_reg = IXGB_READ_REG(hw, UPRCH);
1003 temp_reg = IXGB_READ_REG(hw, VPRCL);
1004 temp_reg = IXGB_READ_REG(hw, VPRCH);
1005 temp_reg = IXGB_READ_REG(hw, JPRCL);
1006 temp_reg = IXGB_READ_REG(hw, JPRCH);
1007 temp_reg = IXGB_READ_REG(hw, GORCL);
1008 temp_reg = IXGB_READ_REG(hw, GORCH);
1009 temp_reg = IXGB_READ_REG(hw, TORL);
1010 temp_reg = IXGB_READ_REG(hw, TORH);
1011 temp_reg = IXGB_READ_REG(hw, RNBC);
1012 temp_reg = IXGB_READ_REG(hw, RUC);
1013 temp_reg = IXGB_READ_REG(hw, ROC);
1014 temp_reg = IXGB_READ_REG(hw, RLEC);
1015 temp_reg = IXGB_READ_REG(hw, CRCERRS);
1016 temp_reg = IXGB_READ_REG(hw, ICBC);
1017 temp_reg = IXGB_READ_REG(hw, ECBC);
1018 temp_reg = IXGB_READ_REG(hw, MPC);
1019 temp_reg = IXGB_READ_REG(hw, TPTL);
1020 temp_reg = IXGB_READ_REG(hw, TPTH);
1021 temp_reg = IXGB_READ_REG(hw, GPTCL);
1022 temp_reg = IXGB_READ_REG(hw, GPTCH);
1023 temp_reg = IXGB_READ_REG(hw, BPTCL);
1024 temp_reg = IXGB_READ_REG(hw, BPTCH);
1025 temp_reg = IXGB_READ_REG(hw, MPTCL);
1026 temp_reg = IXGB_READ_REG(hw, MPTCH);
1027 temp_reg = IXGB_READ_REG(hw, UPTCL);
1028 temp_reg = IXGB_READ_REG(hw, UPTCH);
1029 temp_reg = IXGB_READ_REG(hw, VPTCL);
1030 temp_reg = IXGB_READ_REG(hw, VPTCH);
1031 temp_reg = IXGB_READ_REG(hw, JPTCL);
1032 temp_reg = IXGB_READ_REG(hw, JPTCH);
1033 temp_reg = IXGB_READ_REG(hw, GOTCL);
1034 temp_reg = IXGB_READ_REG(hw, GOTCH);
1035 temp_reg = IXGB_READ_REG(hw, TOTL);
1036 temp_reg = IXGB_READ_REG(hw, TOTH);
1037 temp_reg = IXGB_READ_REG(hw, DC);
1038 temp_reg = IXGB_READ_REG(hw, PLT64C);
1039 temp_reg = IXGB_READ_REG(hw, TSCTC);
1040 temp_reg = IXGB_READ_REG(hw, TSCTFC);
1041 temp_reg = IXGB_READ_REG(hw, IBIC);
1042 temp_reg = IXGB_READ_REG(hw, RFC);
1043 temp_reg = IXGB_READ_REG(hw, LFC);
1044 temp_reg = IXGB_READ_REG(hw, PFRC);
1045 temp_reg = IXGB_READ_REG(hw, PFTC);
1046 temp_reg = IXGB_READ_REG(hw, MCFRC);
1047 temp_reg = IXGB_READ_REG(hw, MCFTC);
1048 temp_reg = IXGB_READ_REG(hw, XONRXC);
1049 temp_reg = IXGB_READ_REG(hw, XONTXC);
1050 temp_reg = IXGB_READ_REG(hw, XOFFRXC);
1051 temp_reg = IXGB_READ_REG(hw, XOFFTXC);
1052 temp_reg = IXGB_READ_REG(hw, RJC);
1056 /******************************************************************************
1057 * Turns on the software controllable LED
1059 * hw - Struct containing variables accessed by shared code
1060 *****************************************************************************/
1062 ixgb_led_on(struct ixgb_hw *hw)
1064 u32 ctrl0_reg = IXGB_READ_REG(hw, CTRL0);
1066 /* To turn on the LED, clear software-definable pin 0 (SDP0). */
1067 ctrl0_reg &= ~IXGB_CTRL0_SDP0;
1068 IXGB_WRITE_REG(hw, CTRL0, ctrl0_reg);
1072 /******************************************************************************
1073 * Turns off the software controllable LED
1075 * hw - Struct containing variables accessed by shared code
1076 *****************************************************************************/
1078 ixgb_led_off(struct ixgb_hw *hw)
1080 u32 ctrl0_reg = IXGB_READ_REG(hw, CTRL0);
1082 /* To turn off the LED, set software-definable pin 0 (SDP0). */
1083 ctrl0_reg |= IXGB_CTRL0_SDP0;
1084 IXGB_WRITE_REG(hw, CTRL0, ctrl0_reg);
1088 /******************************************************************************
1089 * Gets the current PCI bus type, speed, and width of the hardware
1091 * hw - Struct containing variables accessed by shared code
1092 *****************************************************************************/
1094 ixgb_get_bus_info(struct ixgb_hw *hw)
1098 status_reg = IXGB_READ_REG(hw, STATUS);
1100 hw->bus.type = (status_reg & IXGB_STATUS_PCIX_MODE) ?
1101 ixgb_bus_type_pcix : ixgb_bus_type_pci;
1103 if (hw->bus.type == ixgb_bus_type_pci) {
1104 hw->bus.speed = (status_reg & IXGB_STATUS_PCI_SPD) ?
1105 ixgb_bus_speed_66 : ixgb_bus_speed_33;
1107 switch (status_reg & IXGB_STATUS_PCIX_SPD_MASK) {
1108 case IXGB_STATUS_PCIX_SPD_66:
1109 hw->bus.speed = ixgb_bus_speed_66;
1111 case IXGB_STATUS_PCIX_SPD_100:
1112 hw->bus.speed = ixgb_bus_speed_100;
1114 case IXGB_STATUS_PCIX_SPD_133:
1115 hw->bus.speed = ixgb_bus_speed_133;
1118 hw->bus.speed = ixgb_bus_speed_reserved;
1123 hw->bus.width = (status_reg & IXGB_STATUS_BUS64) ?
1124 ixgb_bus_width_64 : ixgb_bus_width_32;
1129 /******************************************************************************
1130 * Tests a MAC address to ensure it is a valid Individual Address
1132 * mac_addr - pointer to MAC address.
1134 *****************************************************************************/
1136 mac_addr_valid(u8 *mac_addr)
1138 bool is_valid = true;
1141 /* Make sure it is not a multicast address */
1142 if (is_multicast_ether_addr(mac_addr)) {
1143 pr_debug("MAC address is multicast\n");
1146 /* Not a broadcast address */
1147 else if (is_broadcast_ether_addr(mac_addr)) {
1148 pr_debug("MAC address is broadcast\n");
1151 /* Reject the zero address */
1152 else if (is_zero_ether_addr(mac_addr)) {
1153 pr_debug("MAC address is all zeros\n");
1159 /******************************************************************************
1160 * Resets the 10GbE link. Waits the settle time and returns the state of
1163 * hw - Struct containing variables accessed by shared code
1164 *****************************************************************************/
1166 ixgb_link_reset(struct ixgb_hw *hw)
1168 bool link_status = false;
1169 u8 wait_retries = MAX_RESET_ITERATIONS;
1170 u8 lrst_retries = MAX_RESET_ITERATIONS;
1173 /* Reset the link */
1174 IXGB_WRITE_REG(hw, CTRL0,
1175 IXGB_READ_REG(hw, CTRL0) | IXGB_CTRL0_LRST);
1177 /* Wait for link-up and lane re-alignment */
1179 udelay(IXGB_DELAY_USECS_AFTER_LINK_RESET);
1181 ((IXGB_READ_REG(hw, STATUS) & IXGB_STATUS_LU)
1182 && (IXGB_READ_REG(hw, XPCSS) &
1183 IXGB_XPCSS_ALIGN_STATUS)) ? true : false;
1184 } while (!link_status && --wait_retries);
1186 } while (!link_status && --lrst_retries);
1191 /******************************************************************************
1192 * Resets the 10GbE optics module.
1194 * hw - Struct containing variables accessed by shared code
1195 *****************************************************************************/
1197 ixgb_optics_reset(struct ixgb_hw *hw)
1199 if (hw->phy_type == ixgb_phy_type_txn17401) {
1202 ixgb_write_phy_reg(hw,
1208 mdio_reg = ixgb_read_phy_reg(hw,
1217 /******************************************************************************
1218 * Resets the 10GbE optics module for Sun variant NIC.
1220 * hw - Struct containing variables accessed by shared code
1221 *****************************************************************************/
1223 #define IXGB_BCM8704_USER_PMD_TX_CTRL_REG 0xC803
1224 #define IXGB_BCM8704_USER_PMD_TX_CTRL_REG_VAL 0x0164
1225 #define IXGB_BCM8704_USER_CTRL_REG 0xC800
1226 #define IXGB_BCM8704_USER_CTRL_REG_VAL 0x7FBF
1227 #define IXGB_BCM8704_USER_DEV3_ADDR 0x0003
1228 #define IXGB_SUN_PHY_ADDRESS 0x0000
1229 #define IXGB_SUN_PHY_RESET_DELAY 305
1232 ixgb_optics_reset_bcm(struct ixgb_hw *hw)
1234 u32 ctrl = IXGB_READ_REG(hw, CTRL0);
1235 ctrl &= ~IXGB_CTRL0_SDP2;
1236 ctrl |= IXGB_CTRL0_SDP3;
1237 IXGB_WRITE_REG(hw, CTRL0, ctrl);
1239 /* SerDes needs extra delay */
1240 msleep(IXGB_SUN_PHY_RESET_DELAY);
1242 /* Broadcom 7408L configuration */
1243 /* Reference clock config */
1244 ixgb_write_phy_reg(hw,
1245 IXGB_BCM8704_USER_PMD_TX_CTRL_REG,
1246 IXGB_SUN_PHY_ADDRESS,
1247 IXGB_BCM8704_USER_DEV3_ADDR,
1248 IXGB_BCM8704_USER_PMD_TX_CTRL_REG_VAL);
1249 /* we must read the registers twice */
1250 ixgb_read_phy_reg(hw,
1251 IXGB_BCM8704_USER_PMD_TX_CTRL_REG,
1252 IXGB_SUN_PHY_ADDRESS,
1253 IXGB_BCM8704_USER_DEV3_ADDR);
1254 ixgb_read_phy_reg(hw,
1255 IXGB_BCM8704_USER_PMD_TX_CTRL_REG,
1256 IXGB_SUN_PHY_ADDRESS,
1257 IXGB_BCM8704_USER_DEV3_ADDR);
1259 ixgb_write_phy_reg(hw,
1260 IXGB_BCM8704_USER_CTRL_REG,
1261 IXGB_SUN_PHY_ADDRESS,
1262 IXGB_BCM8704_USER_DEV3_ADDR,
1263 IXGB_BCM8704_USER_CTRL_REG_VAL);
1264 ixgb_read_phy_reg(hw,
1265 IXGB_BCM8704_USER_CTRL_REG,
1266 IXGB_SUN_PHY_ADDRESS,
1267 IXGB_BCM8704_USER_DEV3_ADDR);
1268 ixgb_read_phy_reg(hw,
1269 IXGB_BCM8704_USER_CTRL_REG,
1270 IXGB_SUN_PHY_ADDRESS,
1271 IXGB_BCM8704_USER_DEV3_ADDR);
1273 /* SerDes needs extra delay */
1274 msleep(IXGB_SUN_PHY_RESET_DELAY);