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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2009 - 2018 Intel Corporation. */
3
4#include <linux/etherdevice.h>
5
6#include "vf.h"
7
8static s32 e1000_check_for_link_vf(struct e1000_hw *hw);
9static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
10 u16 *duplex);
11static s32 e1000_init_hw_vf(struct e1000_hw *hw);
12static s32 e1000_reset_hw_vf(struct e1000_hw *hw);
13
14static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *,
15 u32, u32, u32);
16static void e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
17static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
18static s32 e1000_set_uc_addr_vf(struct e1000_hw *hw, u32 subcmd, u8 *addr);
19static s32 e1000_set_vfta_vf(struct e1000_hw *, u16, bool);
20
21/**
22 * e1000_init_mac_params_vf - Inits MAC params
23 * @hw: pointer to the HW structure
24 **/
25static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
26{
27 struct e1000_mac_info *mac = &hw->mac;
28
29 /* VF's have no MTA Registers - PF feature only */
30 mac->mta_reg_count = 128;
31 /* VF's have no access to RAR entries */
32 mac->rar_entry_count = 1;
33
34 /* Function pointers */
35 /* reset */
36 mac->ops.reset_hw = e1000_reset_hw_vf;
37 /* hw initialization */
38 mac->ops.init_hw = e1000_init_hw_vf;
39 /* check for link */
40 mac->ops.check_for_link = e1000_check_for_link_vf;
41 /* link info */
42 mac->ops.get_link_up_info = e1000_get_link_up_info_vf;
43 /* multicast address update */
44 mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_vf;
45 /* set mac address */
46 mac->ops.rar_set = e1000_rar_set_vf;
47 /* read mac address */
48 mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
49 /* set mac filter */
50 mac->ops.set_uc_addr = e1000_set_uc_addr_vf;
51 /* set vlan filter table array */
52 mac->ops.set_vfta = e1000_set_vfta_vf;
53
54 return E1000_SUCCESS;
55}
56
57/**
58 * e1000_init_function_pointers_vf - Inits function pointers
59 * @hw: pointer to the HW structure
60 **/
61void e1000_init_function_pointers_vf(struct e1000_hw *hw)
62{
63 hw->mac.ops.init_params = e1000_init_mac_params_vf;
64 hw->mbx.ops.init_params = e1000_init_mbx_params_vf;
65}
66
67/**
68 * e1000_get_link_up_info_vf - Gets link info.
69 * @hw: pointer to the HW structure
70 * @speed: pointer to 16 bit value to store link speed.
71 * @duplex: pointer to 16 bit value to store duplex.
72 *
73 * Since we cannot read the PHY and get accurate link info, we must rely upon
74 * the status register's data which is often stale and inaccurate.
75 **/
76static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
77 u16 *duplex)
78{
79 s32 status;
80
81 status = er32(STATUS);
82 if (status & E1000_STATUS_SPEED_1000)
83 *speed = SPEED_1000;
84 else if (status & E1000_STATUS_SPEED_100)
85 *speed = SPEED_100;
86 else
87 *speed = SPEED_10;
88
89 if (status & E1000_STATUS_FD)
90 *duplex = FULL_DUPLEX;
91 else
92 *duplex = HALF_DUPLEX;
93
94 return E1000_SUCCESS;
95}
96
97/**
98 * e1000_reset_hw_vf - Resets the HW
99 * @hw: pointer to the HW structure
100 *
101 * VF's provide a function level reset. This is done using bit 26 of ctrl_reg.
102 * This is all the reset we can perform on a VF.
103 **/
104static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
105{
106 struct e1000_mbx_info *mbx = &hw->mbx;
107 u32 timeout = E1000_VF_INIT_TIMEOUT;
108 u32 ret_val = -E1000_ERR_MAC_INIT;
109 u32 msgbuf[3];
110 u8 *addr = (u8 *)(&msgbuf[1]);
111 u32 ctrl;
112
113 /* assert VF queue/interrupt reset */
114 ctrl = er32(CTRL);
115 ew32(CTRL, ctrl | E1000_CTRL_RST);
116
117 /* we cannot initialize while the RSTI / RSTD bits are asserted */
118 while (!mbx->ops.check_for_rst(hw) && timeout) {
119 timeout--;
120 udelay(5);
121 }
122
123 if (timeout) {
124 /* mailbox timeout can now become active */
125 mbx->timeout = E1000_VF_MBX_INIT_TIMEOUT;
126
127 /* notify PF of VF reset completion */
128 msgbuf[0] = E1000_VF_RESET;
129 mbx->ops.write_posted(hw, msgbuf, 1);
130
131 mdelay(10);
132
133 /* set our "perm_addr" based on info provided by PF */
134 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
135 if (!ret_val) {
136 switch (msgbuf[0]) {
137 case E1000_VF_RESET | E1000_VT_MSGTYPE_ACK:
138 memcpy(hw->mac.perm_addr, addr, ETH_ALEN);
139 break;
140 case E1000_VF_RESET | E1000_VT_MSGTYPE_NACK:
141 eth_zero_addr(hw->mac.perm_addr);
142 break;
143 default:
144 ret_val = -E1000_ERR_MAC_INIT;
145 }
146 }
147 }
148
149 return ret_val;
150}
151
152/**
153 * e1000_init_hw_vf - Inits the HW
154 * @hw: pointer to the HW structure
155 *
156 * Not much to do here except clear the PF Reset indication if there is one.
157 **/
158static s32 e1000_init_hw_vf(struct e1000_hw *hw)
159{
160 /* attempt to set and restore our mac address */
161 e1000_rar_set_vf(hw, hw->mac.addr, 0);
162
163 return E1000_SUCCESS;
164}
165
166/**
167 * e1000_hash_mc_addr_vf - Generate a multicast hash value
168 * @hw: pointer to the HW structure
169 * @mc_addr: pointer to a multicast address
170 *
171 * Generates a multicast address hash value which is used to determine
172 * the multicast filter table array address and new table value. See
173 * e1000_mta_set_generic()
174 **/
175static u32 e1000_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
176{
177 u32 hash_value, hash_mask;
178 u8 bit_shift = 0;
179
180 /* Register count multiplied by bits per register */
181 hash_mask = (hw->mac.mta_reg_count * 32) - 1;
182
183 /* The bit_shift is the number of left-shifts
184 * where 0xFF would still fall within the hash mask.
185 */
186 while (hash_mask >> bit_shift != 0xFF)
187 bit_shift++;
188
189 hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
190 (((u16)mc_addr[5]) << bit_shift)));
191
192 return hash_value;
193}
194
195/**
196 * e1000_update_mc_addr_list_vf - Update Multicast addresses
197 * @hw: pointer to the HW structure
198 * @mc_addr_list: array of multicast addresses to program
199 * @mc_addr_count: number of multicast addresses to program
200 * @rar_used_count: the first RAR register free to program
201 * @rar_count: total number of supported Receive Address Registers
202 *
203 * Updates the Receive Address Registers and Multicast Table Array.
204 * The caller must have a packed mc_addr_list of multicast addresses.
205 * The parameter rar_count will usually be hw->mac.rar_entry_count
206 * unless there are workarounds that change this.
207 **/
208static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw,
209 u8 *mc_addr_list, u32 mc_addr_count,
210 u32 rar_used_count, u32 rar_count)
211{
212 struct e1000_mbx_info *mbx = &hw->mbx;
213 u32 msgbuf[E1000_VFMAILBOX_SIZE];
214 u16 *hash_list = (u16 *)&msgbuf[1];
215 u32 hash_value;
216 u32 cnt, i;
217 s32 ret_val;
218
219 /* Each entry in the list uses 1 16 bit word. We have 30
220 * 16 bit words available in our HW msg buffer (minus 1 for the
221 * msg type). That's 30 hash values if we pack 'em right. If
222 * there are more than 30 MC addresses to add then punt the
223 * extras for now and then add code to handle more than 30 later.
224 * It would be unusual for a server to request that many multi-cast
225 * addresses except for in large enterprise network environments.
226 */
227
228 cnt = (mc_addr_count > 30) ? 30 : mc_addr_count;
229 msgbuf[0] = E1000_VF_SET_MULTICAST;
230 msgbuf[0] |= cnt << E1000_VT_MSGINFO_SHIFT;
231
232 for (i = 0; i < cnt; i++) {
233 hash_value = e1000_hash_mc_addr_vf(hw, mc_addr_list);
234 hash_list[i] = hash_value & 0x0FFFF;
235 mc_addr_list += ETH_ALEN;
236 }
237
238 ret_val = mbx->ops.write_posted(hw, msgbuf, E1000_VFMAILBOX_SIZE);
239 if (!ret_val)
240 mbx->ops.read_posted(hw, msgbuf, 1);
241}
242
243/**
244 * e1000_set_vfta_vf - Set/Unset vlan filter table address
245 * @hw: pointer to the HW structure
246 * @vid: determines the vfta register and bit to set/unset
247 * @set: if true then set bit, else clear bit
248 **/
249static s32 e1000_set_vfta_vf(struct e1000_hw *hw, u16 vid, bool set)
250{
251 struct e1000_mbx_info *mbx = &hw->mbx;
252 u32 msgbuf[2];
253 s32 err;
254
255 msgbuf[0] = E1000_VF_SET_VLAN;
256 msgbuf[1] = vid;
257 /* Setting the 8 bit field MSG INFO to true indicates "add" */
258 if (set)
259 msgbuf[0] |= BIT(E1000_VT_MSGINFO_SHIFT);
260
261 mbx->ops.write_posted(hw, msgbuf, 2);
262
263 err = mbx->ops.read_posted(hw, msgbuf, 2);
264
265 msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
266
267 /* if nacked the vlan was rejected */
268 if (!err && (msgbuf[0] == (E1000_VF_SET_VLAN | E1000_VT_MSGTYPE_NACK)))
269 err = -E1000_ERR_MAC_INIT;
270
271 return err;
272}
273
274/**
275 * e1000_rlpml_set_vf - Set the maximum receive packet length
276 * @hw: pointer to the HW structure
277 * @max_size: value to assign to max frame size
278 **/
279void e1000_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
280{
281 struct e1000_mbx_info *mbx = &hw->mbx;
282 u32 msgbuf[2];
283 s32 ret_val;
284
285 msgbuf[0] = E1000_VF_SET_LPE;
286 msgbuf[1] = max_size;
287
288 ret_val = mbx->ops.write_posted(hw, msgbuf, 2);
289 if (!ret_val)
290 mbx->ops.read_posted(hw, msgbuf, 1);
291}
292
293/**
294 * e1000_rar_set_vf - set device MAC address
295 * @hw: pointer to the HW structure
296 * @addr: pointer to the receive address
297 * @index: receive address array register
298 **/
299static void e1000_rar_set_vf(struct e1000_hw *hw, u8 *addr, u32 index)
300{
301 struct e1000_mbx_info *mbx = &hw->mbx;
302 u32 msgbuf[3];
303 u8 *msg_addr = (u8 *)(&msgbuf[1]);
304 s32 ret_val;
305
306 memset(msgbuf, 0, 12);
307 msgbuf[0] = E1000_VF_SET_MAC_ADDR;
308 memcpy(msg_addr, addr, ETH_ALEN);
309 ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
310
311 if (!ret_val)
312 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
313
314 msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
315
316 /* if nacked the address was rejected, use "perm_addr" */
317 if (!ret_val &&
318 (msgbuf[0] == (E1000_VF_SET_MAC_ADDR | E1000_VT_MSGTYPE_NACK)))
319 e1000_read_mac_addr_vf(hw);
320}
321
322/**
323 * e1000_read_mac_addr_vf - Read device MAC address
324 * @hw: pointer to the HW structure
325 **/
326static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
327{
328 memcpy(hw->mac.addr, hw->mac.perm_addr, ETH_ALEN);
329
330 return E1000_SUCCESS;
331}
332
333/**
334 * e1000_set_uc_addr_vf - Set or clear unicast filters
335 * @hw: pointer to the HW structure
336 * @sub_cmd: add or clear filters
337 * @addr: pointer to the filter MAC address
338 **/
339static s32 e1000_set_uc_addr_vf(struct e1000_hw *hw, u32 sub_cmd, u8 *addr)
340{
341 struct e1000_mbx_info *mbx = &hw->mbx;
342 u32 msgbuf[3], msgbuf_chk;
343 u8 *msg_addr = (u8 *)(&msgbuf[1]);
344 s32 ret_val;
345
346 memset(msgbuf, 0, sizeof(msgbuf));
347 msgbuf[0] |= sub_cmd;
348 msgbuf[0] |= E1000_VF_SET_MAC_ADDR;
349 msgbuf_chk = msgbuf[0];
350
351 if (addr)
352 memcpy(msg_addr, addr, ETH_ALEN);
353
354 ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
355
356 if (!ret_val)
357 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
358
359 msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
360
361 if (!ret_val) {
362 msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
363
364 if (msgbuf[0] == (msgbuf_chk | E1000_VT_MSGTYPE_NACK))
365 return -ENOSPC;
366 }
367
368 return ret_val;
369}
370
371/**
372 * e1000_check_for_link_vf - Check for link for a virtual interface
373 * @hw: pointer to the HW structure
374 *
375 * Checks to see if the underlying PF is still talking to the VF and
376 * if it is then it reports the link state to the hardware, otherwise
377 * it reports link down and returns an error.
378 **/
379static s32 e1000_check_for_link_vf(struct e1000_hw *hw)
380{
381 struct e1000_mbx_info *mbx = &hw->mbx;
382 struct e1000_mac_info *mac = &hw->mac;
383 s32 ret_val = E1000_SUCCESS;
384 u32 in_msg = 0;
385
386 /* We only want to run this if there has been a rst asserted.
387 * in this case that could mean a link change, device reset,
388 * or a virtual function reset
389 */
390
391 /* If we were hit with a reset or timeout drop the link */
392 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
393 mac->get_link_status = true;
394
395 if (!mac->get_link_status)
396 goto out;
397
398 /* if link status is down no point in checking to see if PF is up */
399 if (!(er32(STATUS) & E1000_STATUS_LU))
400 goto out;
401
402 /* if the read failed it could just be a mailbox collision, best wait
403 * until we are called again and don't report an error
404 */
405 if (mbx->ops.read(hw, &in_msg, 1))
406 goto out;
407
408 /* if incoming message isn't clear to send we are waiting on response */
409 if (!(in_msg & E1000_VT_MSGTYPE_CTS)) {
410 /* msg is not CTS and is NACK we must have lost CTS status */
411 if (in_msg & E1000_VT_MSGTYPE_NACK)
412 ret_val = -E1000_ERR_MAC_INIT;
413 goto out;
414 }
415
416 /* the PF is talking, if we timed out in the past we reinit */
417 if (!mbx->timeout) {
418 ret_val = -E1000_ERR_MAC_INIT;
419 goto out;
420 }
421
422 /* if we passed all the tests above then the link is up and we no
423 * longer need to check for link
424 */
425 mac->get_link_status = false;
426
427out:
428 return ret_val;
429}
430
1/*******************************************************************************
2
3 Intel(R) 82576 Virtual Function Linux driver
4 Copyright(c) 2009 - 2012 Intel Corporation.
5
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.
9
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
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, see <http://www.gnu.org/licenses/>.
17
18 The full GNU General Public License is included in this distribution in
19 the file called "COPYING".
20
21 Contact Information:
22 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
23 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24
25*******************************************************************************/
26
27#include "vf.h"
28
29static s32 e1000_check_for_link_vf(struct e1000_hw *hw);
30static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
31 u16 *duplex);
32static s32 e1000_init_hw_vf(struct e1000_hw *hw);
33static s32 e1000_reset_hw_vf(struct e1000_hw *hw);
34
35static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw, u8 *,
36 u32, u32, u32);
37static void e1000_rar_set_vf(struct e1000_hw *, u8 *, u32);
38static s32 e1000_read_mac_addr_vf(struct e1000_hw *);
39static s32 e1000_set_vfta_vf(struct e1000_hw *, u16, bool);
40
41/**
42 * e1000_init_mac_params_vf - Inits MAC params
43 * @hw: pointer to the HW structure
44 **/
45static s32 e1000_init_mac_params_vf(struct e1000_hw *hw)
46{
47 struct e1000_mac_info *mac = &hw->mac;
48
49 /* VF's have no MTA Registers - PF feature only */
50 mac->mta_reg_count = 128;
51 /* VF's have no access to RAR entries */
52 mac->rar_entry_count = 1;
53
54 /* Function pointers */
55 /* reset */
56 mac->ops.reset_hw = e1000_reset_hw_vf;
57 /* hw initialization */
58 mac->ops.init_hw = e1000_init_hw_vf;
59 /* check for link */
60 mac->ops.check_for_link = e1000_check_for_link_vf;
61 /* link info */
62 mac->ops.get_link_up_info = e1000_get_link_up_info_vf;
63 /* multicast address update */
64 mac->ops.update_mc_addr_list = e1000_update_mc_addr_list_vf;
65 /* set mac address */
66 mac->ops.rar_set = e1000_rar_set_vf;
67 /* read mac address */
68 mac->ops.read_mac_addr = e1000_read_mac_addr_vf;
69 /* set vlan filter table array */
70 mac->ops.set_vfta = e1000_set_vfta_vf;
71
72 return E1000_SUCCESS;
73}
74
75/**
76 * e1000_init_function_pointers_vf - Inits function pointers
77 * @hw: pointer to the HW structure
78 **/
79void e1000_init_function_pointers_vf(struct e1000_hw *hw)
80{
81 hw->mac.ops.init_params = e1000_init_mac_params_vf;
82 hw->mbx.ops.init_params = e1000_init_mbx_params_vf;
83}
84
85/**
86 * e1000_get_link_up_info_vf - Gets link info.
87 * @hw: pointer to the HW structure
88 * @speed: pointer to 16 bit value to store link speed.
89 * @duplex: pointer to 16 bit value to store duplex.
90 *
91 * Since we cannot read the PHY and get accurate link info, we must rely upon
92 * the status register's data which is often stale and inaccurate.
93 **/
94static s32 e1000_get_link_up_info_vf(struct e1000_hw *hw, u16 *speed,
95 u16 *duplex)
96{
97 s32 status;
98
99 status = er32(STATUS);
100 if (status & E1000_STATUS_SPEED_1000)
101 *speed = SPEED_1000;
102 else if (status & E1000_STATUS_SPEED_100)
103 *speed = SPEED_100;
104 else
105 *speed = SPEED_10;
106
107 if (status & E1000_STATUS_FD)
108 *duplex = FULL_DUPLEX;
109 else
110 *duplex = HALF_DUPLEX;
111
112 return E1000_SUCCESS;
113}
114
115/**
116 * e1000_reset_hw_vf - Resets the HW
117 * @hw: pointer to the HW structure
118 *
119 * VF's provide a function level reset. This is done using bit 26 of ctrl_reg.
120 * This is all the reset we can perform on a VF.
121 **/
122static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
123{
124 struct e1000_mbx_info *mbx = &hw->mbx;
125 u32 timeout = E1000_VF_INIT_TIMEOUT;
126 u32 ret_val = -E1000_ERR_MAC_INIT;
127 u32 msgbuf[3];
128 u8 *addr = (u8 *)(&msgbuf[1]);
129 u32 ctrl;
130
131 /* assert VF queue/interrupt reset */
132 ctrl = er32(CTRL);
133 ew32(CTRL, ctrl | E1000_CTRL_RST);
134
135 /* we cannot initialize while the RSTI / RSTD bits are asserted */
136 while (!mbx->ops.check_for_rst(hw) && timeout) {
137 timeout--;
138 udelay(5);
139 }
140
141 if (timeout) {
142 /* mailbox timeout can now become active */
143 mbx->timeout = E1000_VF_MBX_INIT_TIMEOUT;
144
145 /* notify PF of VF reset completion */
146 msgbuf[0] = E1000_VF_RESET;
147 mbx->ops.write_posted(hw, msgbuf, 1);
148
149 msleep(10);
150
151 /* set our "perm_addr" based on info provided by PF */
152 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
153 if (!ret_val) {
154 if (msgbuf[0] == (E1000_VF_RESET |
155 E1000_VT_MSGTYPE_ACK))
156 memcpy(hw->mac.perm_addr, addr, ETH_ALEN);
157 else
158 ret_val = -E1000_ERR_MAC_INIT;
159 }
160 }
161
162 return ret_val;
163}
164
165/**
166 * e1000_init_hw_vf - Inits the HW
167 * @hw: pointer to the HW structure
168 *
169 * Not much to do here except clear the PF Reset indication if there is one.
170 **/
171static s32 e1000_init_hw_vf(struct e1000_hw *hw)
172{
173 /* attempt to set and restore our mac address */
174 e1000_rar_set_vf(hw, hw->mac.addr, 0);
175
176 return E1000_SUCCESS;
177}
178
179/**
180 * e1000_hash_mc_addr_vf - Generate a multicast hash value
181 * @hw: pointer to the HW structure
182 * @mc_addr: pointer to a multicast address
183 *
184 * Generates a multicast address hash value which is used to determine
185 * the multicast filter table array address and new table value. See
186 * e1000_mta_set_generic()
187 **/
188static u32 e1000_hash_mc_addr_vf(struct e1000_hw *hw, u8 *mc_addr)
189{
190 u32 hash_value, hash_mask;
191 u8 bit_shift = 0;
192
193 /* Register count multiplied by bits per register */
194 hash_mask = (hw->mac.mta_reg_count * 32) - 1;
195
196 /* The bit_shift is the number of left-shifts
197 * where 0xFF would still fall within the hash mask.
198 */
199 while (hash_mask >> bit_shift != 0xFF)
200 bit_shift++;
201
202 hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
203 (((u16)mc_addr[5]) << bit_shift)));
204
205 return hash_value;
206}
207
208/**
209 * e1000_update_mc_addr_list_vf - Update Multicast addresses
210 * @hw: pointer to the HW structure
211 * @mc_addr_list: array of multicast addresses to program
212 * @mc_addr_count: number of multicast addresses to program
213 * @rar_used_count: the first RAR register free to program
214 * @rar_count: total number of supported Receive Address Registers
215 *
216 * Updates the Receive Address Registers and Multicast Table Array.
217 * The caller must have a packed mc_addr_list of multicast addresses.
218 * The parameter rar_count will usually be hw->mac.rar_entry_count
219 * unless there are workarounds that change this.
220 **/
221static void e1000_update_mc_addr_list_vf(struct e1000_hw *hw,
222 u8 *mc_addr_list, u32 mc_addr_count,
223 u32 rar_used_count, u32 rar_count)
224{
225 struct e1000_mbx_info *mbx = &hw->mbx;
226 u32 msgbuf[E1000_VFMAILBOX_SIZE];
227 u16 *hash_list = (u16 *)&msgbuf[1];
228 u32 hash_value;
229 u32 cnt, i;
230
231 /* Each entry in the list uses 1 16 bit word. We have 30
232 * 16 bit words available in our HW msg buffer (minus 1 for the
233 * msg type). That's 30 hash values if we pack 'em right. If
234 * there are more than 30 MC addresses to add then punt the
235 * extras for now and then add code to handle more than 30 later.
236 * It would be unusual for a server to request that many multi-cast
237 * addresses except for in large enterprise network environments.
238 */
239
240 cnt = (mc_addr_count > 30) ? 30 : mc_addr_count;
241 msgbuf[0] = E1000_VF_SET_MULTICAST;
242 msgbuf[0] |= cnt << E1000_VT_MSGINFO_SHIFT;
243
244 for (i = 0; i < cnt; i++) {
245 hash_value = e1000_hash_mc_addr_vf(hw, mc_addr_list);
246 hash_list[i] = hash_value & 0x0FFFF;
247 mc_addr_list += ETH_ALEN;
248 }
249
250 mbx->ops.write_posted(hw, msgbuf, E1000_VFMAILBOX_SIZE);
251}
252
253/**
254 * e1000_set_vfta_vf - Set/Unset vlan filter table address
255 * @hw: pointer to the HW structure
256 * @vid: determines the vfta register and bit to set/unset
257 * @set: if true then set bit, else clear bit
258 **/
259static s32 e1000_set_vfta_vf(struct e1000_hw *hw, u16 vid, bool set)
260{
261 struct e1000_mbx_info *mbx = &hw->mbx;
262 u32 msgbuf[2];
263 s32 err;
264
265 msgbuf[0] = E1000_VF_SET_VLAN;
266 msgbuf[1] = vid;
267 /* Setting the 8 bit field MSG INFO to true indicates "add" */
268 if (set)
269 msgbuf[0] |= 1 << E1000_VT_MSGINFO_SHIFT;
270
271 mbx->ops.write_posted(hw, msgbuf, 2);
272
273 err = mbx->ops.read_posted(hw, msgbuf, 2);
274
275 msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
276
277 /* if nacked the vlan was rejected */
278 if (!err && (msgbuf[0] == (E1000_VF_SET_VLAN | E1000_VT_MSGTYPE_NACK)))
279 err = -E1000_ERR_MAC_INIT;
280
281 return err;
282}
283
284/**
285 * e1000_rlpml_set_vf - Set the maximum receive packet length
286 * @hw: pointer to the HW structure
287 * @max_size: value to assign to max frame size
288 **/
289void e1000_rlpml_set_vf(struct e1000_hw *hw, u16 max_size)
290{
291 struct e1000_mbx_info *mbx = &hw->mbx;
292 u32 msgbuf[2];
293
294 msgbuf[0] = E1000_VF_SET_LPE;
295 msgbuf[1] = max_size;
296
297 mbx->ops.write_posted(hw, msgbuf, 2);
298}
299
300/**
301 * e1000_rar_set_vf - set device MAC address
302 * @hw: pointer to the HW structure
303 * @addr: pointer to the receive address
304 * @index: receive address array register
305 **/
306static void e1000_rar_set_vf(struct e1000_hw *hw, u8 *addr, u32 index)
307{
308 struct e1000_mbx_info *mbx = &hw->mbx;
309 u32 msgbuf[3];
310 u8 *msg_addr = (u8 *)(&msgbuf[1]);
311 s32 ret_val;
312
313 memset(msgbuf, 0, 12);
314 msgbuf[0] = E1000_VF_SET_MAC_ADDR;
315 memcpy(msg_addr, addr, ETH_ALEN);
316 ret_val = mbx->ops.write_posted(hw, msgbuf, 3);
317
318 if (!ret_val)
319 ret_val = mbx->ops.read_posted(hw, msgbuf, 3);
320
321 msgbuf[0] &= ~E1000_VT_MSGTYPE_CTS;
322
323 /* if nacked the address was rejected, use "perm_addr" */
324 if (!ret_val &&
325 (msgbuf[0] == (E1000_VF_SET_MAC_ADDR | E1000_VT_MSGTYPE_NACK)))
326 e1000_read_mac_addr_vf(hw);
327}
328
329/**
330 * e1000_read_mac_addr_vf - Read device MAC address
331 * @hw: pointer to the HW structure
332 **/
333static s32 e1000_read_mac_addr_vf(struct e1000_hw *hw)
334{
335 memcpy(hw->mac.addr, hw->mac.perm_addr, ETH_ALEN);
336
337 return E1000_SUCCESS;
338}
339
340/**
341 * e1000_check_for_link_vf - Check for link for a virtual interface
342 * @hw: pointer to the HW structure
343 *
344 * Checks to see if the underlying PF is still talking to the VF and
345 * if it is then it reports the link state to the hardware, otherwise
346 * it reports link down and returns an error.
347 **/
348static s32 e1000_check_for_link_vf(struct e1000_hw *hw)
349{
350 struct e1000_mbx_info *mbx = &hw->mbx;
351 struct e1000_mac_info *mac = &hw->mac;
352 s32 ret_val = E1000_SUCCESS;
353 u32 in_msg = 0;
354
355 /* We only want to run this if there has been a rst asserted.
356 * in this case that could mean a link change, device reset,
357 * or a virtual function reset
358 */
359
360 /* If we were hit with a reset or timeout drop the link */
361 if (!mbx->ops.check_for_rst(hw) || !mbx->timeout)
362 mac->get_link_status = true;
363
364 if (!mac->get_link_status)
365 goto out;
366
367 /* if link status is down no point in checking to see if PF is up */
368 if (!(er32(STATUS) & E1000_STATUS_LU))
369 goto out;
370
371 /* if the read failed it could just be a mailbox collision, best wait
372 * until we are called again and don't report an error
373 */
374 if (mbx->ops.read(hw, &in_msg, 1))
375 goto out;
376
377 /* if incoming message isn't clear to send we are waiting on response */
378 if (!(in_msg & E1000_VT_MSGTYPE_CTS)) {
379 /* msg is not CTS and is NACK we must have lost CTS status */
380 if (in_msg & E1000_VT_MSGTYPE_NACK)
381 ret_val = -E1000_ERR_MAC_INIT;
382 goto out;
383 }
384
385 /* the PF is talking, if we timed out in the past we reinit */
386 if (!mbx->timeout) {
387 ret_val = -E1000_ERR_MAC_INIT;
388 goto out;
389 }
390
391 /* if we passed all the tests above then the link is up and we no
392 * longer need to check for link
393 */
394 mac->get_link_status = false;
395
396out:
397 return ret_val;
398}
399