| 1 | /****************************************************************************** |
| 2 | |
| 3 | Copyright (c) 2001-2012, Intel Corporation |
| 4 | All rights reserved. |
| 5 | |
| 6 | Redistribution and use in source and binary forms, with or without |
| 7 | modification, are permitted provided that the following conditions are met: |
| 8 | |
| 9 | 1. Redistributions of source code must retain the above copyright notice, |
| 10 | this list of conditions and the following disclaimer. |
| 11 | |
| 12 | 2. Redistributions in binary form must reproduce the above copyright |
| 13 | notice, this list of conditions and the following disclaimer in the |
| 14 | documentation and/or other materials provided with the distribution. |
| 15 | |
| 16 | 3. Neither the name of the Intel Corporation nor the names of its |
| 17 | contributors may be used to endorse or promote products derived from |
| 18 | this software without specific prior written permission. |
| 19 | |
| 20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 21 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 24 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | POSSIBILITY OF SUCH DAMAGE. |
| 31 | |
| 32 | ******************************************************************************/ |
| 33 | /*$FreeBSD: src/sys/dev/ixgbe/ixgbe_mbx.c,v 1.2 2011/01/19 19:36:27 jfv Exp $*/ |
| 34 | /*$NetBSD: ixgbe_mbx.c,v 1.3 2015/04/02 09:26:55 msaitoh Exp $*/ |
| 35 | |
| 36 | #include "ixgbe_type.h" |
| 37 | #include "ixgbe_mbx.h" |
| 38 | |
| 39 | /** |
| 40 | * ixgbe_read_mbx - Reads a message from the mailbox |
| 41 | * @hw: pointer to the HW structure |
| 42 | * @msg: The message buffer |
| 43 | * @size: Length of buffer |
| 44 | * @mbx_id: id of mailbox to read |
| 45 | * |
| 46 | * returns SUCCESS if it successfuly read message from buffer |
| 47 | **/ |
| 48 | s32 ixgbe_read_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) |
| 49 | { |
| 50 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 51 | s32 ret_val = IXGBE_ERR_MBX; |
| 52 | |
| 53 | DEBUGFUNC("ixgbe_read_mbx" ); |
| 54 | |
| 55 | /* limit read to size of mailbox */ |
| 56 | if (size > mbx->size) |
| 57 | size = mbx->size; |
| 58 | |
| 59 | if (mbx->ops.read) |
| 60 | ret_val = mbx->ops.read(hw, msg, size, mbx_id); |
| 61 | |
| 62 | return ret_val; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * ixgbe_write_mbx - Write a message to the mailbox |
| 67 | * @hw: pointer to the HW structure |
| 68 | * @msg: The message buffer |
| 69 | * @size: Length of buffer |
| 70 | * @mbx_id: id of mailbox to write |
| 71 | * |
| 72 | * returns SUCCESS if it successfully copied message into the buffer |
| 73 | **/ |
| 74 | s32 ixgbe_write_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) |
| 75 | { |
| 76 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 77 | s32 ret_val = IXGBE_SUCCESS; |
| 78 | |
| 79 | DEBUGFUNC("ixgbe_write_mbx" ); |
| 80 | |
| 81 | if (size > mbx->size) |
| 82 | ret_val = IXGBE_ERR_MBX; |
| 83 | |
| 84 | else if (mbx->ops.write) |
| 85 | ret_val = mbx->ops.write(hw, msg, size, mbx_id); |
| 86 | |
| 87 | return ret_val; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * ixgbe_check_for_msg - checks to see if someone sent us mail |
| 92 | * @hw: pointer to the HW structure |
| 93 | * @mbx_id: id of mailbox to check |
| 94 | * |
| 95 | * returns SUCCESS if the Status bit was found or else ERR_MBX |
| 96 | **/ |
| 97 | s32 ixgbe_check_for_msg(struct ixgbe_hw *hw, u16 mbx_id) |
| 98 | { |
| 99 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 100 | s32 ret_val = IXGBE_ERR_MBX; |
| 101 | |
| 102 | DEBUGFUNC("ixgbe_check_for_msg" ); |
| 103 | |
| 104 | if (mbx->ops.check_for_msg) |
| 105 | ret_val = mbx->ops.check_for_msg(hw, mbx_id); |
| 106 | |
| 107 | return ret_val; |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * ixgbe_check_for_ack - checks to see if someone sent us ACK |
| 112 | * @hw: pointer to the HW structure |
| 113 | * @mbx_id: id of mailbox to check |
| 114 | * |
| 115 | * returns SUCCESS if the Status bit was found or else ERR_MBX |
| 116 | **/ |
| 117 | s32 ixgbe_check_for_ack(struct ixgbe_hw *hw, u16 mbx_id) |
| 118 | { |
| 119 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 120 | s32 ret_val = IXGBE_ERR_MBX; |
| 121 | |
| 122 | DEBUGFUNC("ixgbe_check_for_ack" ); |
| 123 | |
| 124 | if (mbx->ops.check_for_ack) |
| 125 | ret_val = mbx->ops.check_for_ack(hw, mbx_id); |
| 126 | |
| 127 | return ret_val; |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * ixgbe_check_for_rst - checks to see if other side has reset |
| 132 | * @hw: pointer to the HW structure |
| 133 | * @mbx_id: id of mailbox to check |
| 134 | * |
| 135 | * returns SUCCESS if the Status bit was found or else ERR_MBX |
| 136 | **/ |
| 137 | s32 ixgbe_check_for_rst(struct ixgbe_hw *hw, u16 mbx_id) |
| 138 | { |
| 139 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 140 | s32 ret_val = IXGBE_ERR_MBX; |
| 141 | |
| 142 | DEBUGFUNC("ixgbe_check_for_rst" ); |
| 143 | |
| 144 | if (mbx->ops.check_for_rst) |
| 145 | ret_val = mbx->ops.check_for_rst(hw, mbx_id); |
| 146 | |
| 147 | return ret_val; |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * ixgbe_poll_for_msg - Wait for message notification |
| 152 | * @hw: pointer to the HW structure |
| 153 | * @mbx_id: id of mailbox to write |
| 154 | * |
| 155 | * returns SUCCESS if it successfully received a message notification |
| 156 | **/ |
| 157 | static s32 ixgbe_poll_for_msg(struct ixgbe_hw *hw, u16 mbx_id) |
| 158 | { |
| 159 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 160 | int countdown = mbx->timeout; |
| 161 | |
| 162 | DEBUGFUNC("ixgbe_poll_for_msg" ); |
| 163 | |
| 164 | if (!countdown || !mbx->ops.check_for_msg) |
| 165 | goto out; |
| 166 | |
| 167 | while (countdown && mbx->ops.check_for_msg(hw, mbx_id)) { |
| 168 | countdown--; |
| 169 | if (!countdown) |
| 170 | break; |
| 171 | usec_delay(mbx->usec_delay); |
| 172 | } |
| 173 | |
| 174 | out: |
| 175 | return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX; |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * ixgbe_poll_for_ack - Wait for message acknowledgement |
| 180 | * @hw: pointer to the HW structure |
| 181 | * @mbx_id: id of mailbox to write |
| 182 | * |
| 183 | * returns SUCCESS if it successfully received a message acknowledgement |
| 184 | **/ |
| 185 | static s32 ixgbe_poll_for_ack(struct ixgbe_hw *hw, u16 mbx_id) |
| 186 | { |
| 187 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 188 | int countdown = mbx->timeout; |
| 189 | |
| 190 | DEBUGFUNC("ixgbe_poll_for_ack" ); |
| 191 | |
| 192 | if (!countdown || !mbx->ops.check_for_ack) |
| 193 | goto out; |
| 194 | |
| 195 | while (countdown && mbx->ops.check_for_ack(hw, mbx_id)) { |
| 196 | countdown--; |
| 197 | if (!countdown) |
| 198 | break; |
| 199 | usec_delay(mbx->usec_delay); |
| 200 | } |
| 201 | |
| 202 | out: |
| 203 | return countdown ? IXGBE_SUCCESS : IXGBE_ERR_MBX; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * ixgbe_read_posted_mbx - Wait for message notification and receive message |
| 208 | * @hw: pointer to the HW structure |
| 209 | * @msg: The message buffer |
| 210 | * @size: Length of buffer |
| 211 | * @mbx_id: id of mailbox to write |
| 212 | * |
| 213 | * returns SUCCESS if it successfully received a message notification and |
| 214 | * copied it into the receive buffer. |
| 215 | **/ |
| 216 | s32 ixgbe_read_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, u16 mbx_id) |
| 217 | { |
| 218 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 219 | s32 ret_val = IXGBE_ERR_MBX; |
| 220 | |
| 221 | DEBUGFUNC("ixgbe_read_posted_mbx" ); |
| 222 | |
| 223 | if (!mbx->ops.read) |
| 224 | goto out; |
| 225 | |
| 226 | ret_val = ixgbe_poll_for_msg(hw, mbx_id); |
| 227 | |
| 228 | /* if ack received read message, otherwise we timed out */ |
| 229 | if (!ret_val) |
| 230 | ret_val = mbx->ops.read(hw, msg, size, mbx_id); |
| 231 | out: |
| 232 | return ret_val; |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * ixgbe_write_posted_mbx - Write a message to the mailbox, wait for ack |
| 237 | * @hw: pointer to the HW structure |
| 238 | * @msg: The message buffer |
| 239 | * @size: Length of buffer |
| 240 | * @mbx_id: id of mailbox to write |
| 241 | * |
| 242 | * returns SUCCESS if it successfully copied message into the buffer and |
| 243 | * received an ack to that message within delay * timeout period |
| 244 | **/ |
| 245 | s32 ixgbe_write_posted_mbx(struct ixgbe_hw *hw, u32 *msg, u16 size, |
| 246 | u16 mbx_id) |
| 247 | { |
| 248 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 249 | s32 ret_val = IXGBE_ERR_MBX; |
| 250 | |
| 251 | DEBUGFUNC("ixgbe_write_posted_mbx" ); |
| 252 | |
| 253 | /* exit if either we can't write or there isn't a defined timeout */ |
| 254 | if (!mbx->ops.write || !mbx->timeout) |
| 255 | goto out; |
| 256 | |
| 257 | /* send msg */ |
| 258 | ret_val = mbx->ops.write(hw, msg, size, mbx_id); |
| 259 | |
| 260 | /* if msg sent wait until we receive an ack */ |
| 261 | if (!ret_val) |
| 262 | ret_val = ixgbe_poll_for_ack(hw, mbx_id); |
| 263 | out: |
| 264 | return ret_val; |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * ixgbe_init_mbx_ops_generic - Initialize MB function pointers |
| 269 | * @hw: pointer to the HW structure |
| 270 | * |
| 271 | * Setups up the mailbox read and write message function pointers |
| 272 | **/ |
| 273 | void ixgbe_init_mbx_ops_generic(struct ixgbe_hw *hw) |
| 274 | { |
| 275 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 276 | |
| 277 | mbx->ops.read_posted = ixgbe_read_posted_mbx; |
| 278 | mbx->ops.write_posted = ixgbe_write_posted_mbx; |
| 279 | } |
| 280 | |
| 281 | /** |
| 282 | * ixgbe_read_v2p_mailbox - read v2p mailbox |
| 283 | * @hw: pointer to the HW structure |
| 284 | * |
| 285 | * This function is used to read the v2p mailbox without losing the read to |
| 286 | * clear status bits. |
| 287 | **/ |
| 288 | static u32 ixgbe_read_v2p_mailbox(struct ixgbe_hw *hw) |
| 289 | { |
| 290 | u32 v2p_mailbox = IXGBE_READ_REG(hw, IXGBE_VFMAILBOX); |
| 291 | |
| 292 | v2p_mailbox |= hw->mbx.v2p_mailbox; |
| 293 | hw->mbx.v2p_mailbox |= v2p_mailbox & IXGBE_VFMAILBOX_R2C_BITS; |
| 294 | |
| 295 | return v2p_mailbox; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * ixgbe_check_for_bit_vf - Determine if a status bit was set |
| 300 | * @hw: pointer to the HW structure |
| 301 | * @mask: bitmask for bits to be tested and cleared |
| 302 | * |
| 303 | * This function is used to check for the read to clear bits within |
| 304 | * the V2P mailbox. |
| 305 | **/ |
| 306 | static s32 ixgbe_check_for_bit_vf(struct ixgbe_hw *hw, u32 mask) |
| 307 | { |
| 308 | u32 v2p_mailbox = ixgbe_read_v2p_mailbox(hw); |
| 309 | s32 ret_val = IXGBE_ERR_MBX; |
| 310 | |
| 311 | if (v2p_mailbox & mask) |
| 312 | ret_val = IXGBE_SUCCESS; |
| 313 | |
| 314 | hw->mbx.v2p_mailbox &= ~mask; |
| 315 | |
| 316 | return ret_val; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * ixgbe_check_for_msg_vf - checks to see if the PF has sent mail |
| 321 | * @hw: pointer to the HW structure |
| 322 | * @mbx_id: id of mailbox to check |
| 323 | * |
| 324 | * returns SUCCESS if the PF has set the Status bit or else ERR_MBX |
| 325 | **/ |
| 326 | static s32 ixgbe_check_for_msg_vf(struct ixgbe_hw *hw, u16 mbx_id) |
| 327 | { |
| 328 | s32 ret_val = IXGBE_ERR_MBX; |
| 329 | |
| 330 | UNREFERENCED_1PARAMETER(mbx_id); |
| 331 | DEBUGFUNC("ixgbe_check_for_msg_vf" ); |
| 332 | |
| 333 | if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFSTS)) { |
| 334 | ret_val = IXGBE_SUCCESS; |
| 335 | hw->mbx.stats.reqs++; |
| 336 | } |
| 337 | |
| 338 | return ret_val; |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * ixgbe_check_for_ack_vf - checks to see if the PF has ACK'd |
| 343 | * @hw: pointer to the HW structure |
| 344 | * @mbx_id: id of mailbox to check |
| 345 | * |
| 346 | * returns SUCCESS if the PF has set the ACK bit or else ERR_MBX |
| 347 | **/ |
| 348 | static s32 ixgbe_check_for_ack_vf(struct ixgbe_hw *hw, u16 mbx_id) |
| 349 | { |
| 350 | s32 ret_val = IXGBE_ERR_MBX; |
| 351 | |
| 352 | UNREFERENCED_1PARAMETER(mbx_id); |
| 353 | DEBUGFUNC("ixgbe_check_for_ack_vf" ); |
| 354 | |
| 355 | if (!ixgbe_check_for_bit_vf(hw, IXGBE_VFMAILBOX_PFACK)) { |
| 356 | ret_val = IXGBE_SUCCESS; |
| 357 | hw->mbx.stats.acks++; |
| 358 | } |
| 359 | |
| 360 | return ret_val; |
| 361 | } |
| 362 | |
| 363 | /** |
| 364 | * ixgbe_check_for_rst_vf - checks to see if the PF has reset |
| 365 | * @hw: pointer to the HW structure |
| 366 | * @mbx_id: id of mailbox to check |
| 367 | * |
| 368 | * returns TRUE if the PF has set the reset done bit or else FALSE |
| 369 | **/ |
| 370 | static s32 ixgbe_check_for_rst_vf(struct ixgbe_hw *hw, u16 mbx_id) |
| 371 | { |
| 372 | s32 ret_val = IXGBE_ERR_MBX; |
| 373 | |
| 374 | UNREFERENCED_1PARAMETER(mbx_id); |
| 375 | DEBUGFUNC("ixgbe_check_for_rst_vf" ); |
| 376 | |
| 377 | if (!ixgbe_check_for_bit_vf(hw, (IXGBE_VFMAILBOX_RSTD | |
| 378 | IXGBE_VFMAILBOX_RSTI))) { |
| 379 | ret_val = IXGBE_SUCCESS; |
| 380 | hw->mbx.stats.rsts++; |
| 381 | } |
| 382 | |
| 383 | return ret_val; |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * ixgbe_obtain_mbx_lock_vf - obtain mailbox lock |
| 388 | * @hw: pointer to the HW structure |
| 389 | * |
| 390 | * return SUCCESS if we obtained the mailbox lock |
| 391 | **/ |
| 392 | static s32 ixgbe_obtain_mbx_lock_vf(struct ixgbe_hw *hw) |
| 393 | { |
| 394 | s32 ret_val = IXGBE_ERR_MBX; |
| 395 | |
| 396 | DEBUGFUNC("ixgbe_obtain_mbx_lock_vf" ); |
| 397 | |
| 398 | /* Take ownership of the buffer */ |
| 399 | IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_VFU); |
| 400 | |
| 401 | /* reserve mailbox for vf use */ |
| 402 | if (ixgbe_read_v2p_mailbox(hw) & IXGBE_VFMAILBOX_VFU) |
| 403 | ret_val = IXGBE_SUCCESS; |
| 404 | |
| 405 | return ret_val; |
| 406 | } |
| 407 | |
| 408 | /** |
| 409 | * ixgbe_write_mbx_vf - Write a message to the mailbox |
| 410 | * @hw: pointer to the HW structure |
| 411 | * @msg: The message buffer |
| 412 | * @size: Length of buffer |
| 413 | * @mbx_id: id of mailbox to write |
| 414 | * |
| 415 | * returns SUCCESS if it successfully copied message into the buffer |
| 416 | **/ |
| 417 | static s32 ixgbe_write_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size, |
| 418 | u16 mbx_id) |
| 419 | { |
| 420 | s32 ret_val; |
| 421 | u16 i; |
| 422 | |
| 423 | UNREFERENCED_1PARAMETER(mbx_id); |
| 424 | |
| 425 | DEBUGFUNC("ixgbe_write_mbx_vf" ); |
| 426 | |
| 427 | /* lock the mailbox to prevent pf/vf race condition */ |
| 428 | ret_val = ixgbe_obtain_mbx_lock_vf(hw); |
| 429 | if (ret_val) |
| 430 | goto out_no_write; |
| 431 | |
| 432 | /* flush msg and acks as we are overwriting the message buffer */ |
| 433 | ixgbe_check_for_msg_vf(hw, 0); |
| 434 | ixgbe_check_for_ack_vf(hw, 0); |
| 435 | |
| 436 | /* copy the caller specified message to the mailbox memory buffer */ |
| 437 | for (i = 0; i < size; i++) |
| 438 | IXGBE_WRITE_REG_ARRAY(hw, IXGBE_VFMBMEM, i, msg[i]); |
| 439 | |
| 440 | /* update stats */ |
| 441 | hw->mbx.stats.msgs_tx++; |
| 442 | |
| 443 | /* Drop VFU and interrupt the PF to tell it a message has been sent */ |
| 444 | IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_REQ); |
| 445 | |
| 446 | out_no_write: |
| 447 | return ret_val; |
| 448 | } |
| 449 | |
| 450 | /** |
| 451 | * ixgbe_read_mbx_vf - Reads a message from the inbox intended for vf |
| 452 | * @hw: pointer to the HW structure |
| 453 | * @msg: The message buffer |
| 454 | * @size: Length of buffer |
| 455 | * @mbx_id: id of mailbox to read |
| 456 | * |
| 457 | * returns SUCCESS if it successfuly read message from buffer |
| 458 | **/ |
| 459 | static s32 ixgbe_read_mbx_vf(struct ixgbe_hw *hw, u32 *msg, u16 size, |
| 460 | u16 mbx_id) |
| 461 | { |
| 462 | s32 ret_val = IXGBE_SUCCESS; |
| 463 | u16 i; |
| 464 | |
| 465 | DEBUGFUNC("ixgbe_read_mbx_vf" ); |
| 466 | UNREFERENCED_1PARAMETER(mbx_id); |
| 467 | |
| 468 | /* lock the mailbox to prevent pf/vf race condition */ |
| 469 | ret_val = ixgbe_obtain_mbx_lock_vf(hw); |
| 470 | if (ret_val) |
| 471 | goto out_no_read; |
| 472 | |
| 473 | /* copy the message from the mailbox memory buffer */ |
| 474 | for (i = 0; i < size; i++) |
| 475 | msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_VFMBMEM, i); |
| 476 | |
| 477 | /* Acknowledge receipt and release mailbox, then we're done */ |
| 478 | IXGBE_WRITE_REG(hw, IXGBE_VFMAILBOX, IXGBE_VFMAILBOX_ACK); |
| 479 | |
| 480 | /* update stats */ |
| 481 | hw->mbx.stats.msgs_rx++; |
| 482 | |
| 483 | out_no_read: |
| 484 | return ret_val; |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * ixgbe_init_mbx_params_vf - set initial values for vf mailbox |
| 489 | * @hw: pointer to the HW structure |
| 490 | * |
| 491 | * Initializes the hw->mbx struct to correct values for vf mailbox |
| 492 | */ |
| 493 | void ixgbe_init_mbx_params_vf(struct ixgbe_hw *hw) |
| 494 | { |
| 495 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 496 | |
| 497 | /* start mailbox as timed out and let the reset_hw call set the timeout |
| 498 | * value to begin communications */ |
| 499 | mbx->timeout = 0; |
| 500 | mbx->usec_delay = IXGBE_VF_MBX_INIT_DELAY; |
| 501 | |
| 502 | mbx->size = IXGBE_VFMAILBOX_SIZE; |
| 503 | |
| 504 | mbx->ops.read = ixgbe_read_mbx_vf; |
| 505 | mbx->ops.write = ixgbe_write_mbx_vf; |
| 506 | mbx->ops.read_posted = ixgbe_read_posted_mbx; |
| 507 | mbx->ops.write_posted = ixgbe_write_posted_mbx; |
| 508 | mbx->ops.check_for_msg = ixgbe_check_for_msg_vf; |
| 509 | mbx->ops.check_for_ack = ixgbe_check_for_ack_vf; |
| 510 | mbx->ops.check_for_rst = ixgbe_check_for_rst_vf; |
| 511 | |
| 512 | mbx->stats.msgs_tx = 0; |
| 513 | mbx->stats.msgs_rx = 0; |
| 514 | mbx->stats.reqs = 0; |
| 515 | mbx->stats.acks = 0; |
| 516 | mbx->stats.rsts = 0; |
| 517 | } |
| 518 | |
| 519 | static s32 ixgbe_check_for_bit_pf(struct ixgbe_hw *hw, u32 mask, s32 index) |
| 520 | { |
| 521 | u32 mbvficr = IXGBE_READ_REG(hw, IXGBE_MBVFICR(index)); |
| 522 | s32 ret_val = IXGBE_ERR_MBX; |
| 523 | |
| 524 | if (mbvficr & mask) { |
| 525 | ret_val = IXGBE_SUCCESS; |
| 526 | IXGBE_WRITE_REG(hw, IXGBE_MBVFICR(index), mask); |
| 527 | } |
| 528 | |
| 529 | return ret_val; |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * ixgbe_check_for_msg_pf - checks to see if the VF has sent mail |
| 534 | * @hw: pointer to the HW structure |
| 535 | * @vf_number: the VF index |
| 536 | * |
| 537 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX |
| 538 | **/ |
| 539 | static s32 ixgbe_check_for_msg_pf(struct ixgbe_hw *hw, u16 vf_number) |
| 540 | { |
| 541 | s32 ret_val = IXGBE_ERR_MBX; |
| 542 | s32 index = IXGBE_MBVFICR_INDEX(vf_number); |
| 543 | u32 vf_bit = vf_number % 16; |
| 544 | |
| 545 | DEBUGFUNC("ixgbe_check_for_msg_pf" ); |
| 546 | |
| 547 | if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFREQ_VF1 << vf_bit, |
| 548 | index)) { |
| 549 | ret_val = IXGBE_SUCCESS; |
| 550 | hw->mbx.stats.reqs++; |
| 551 | } |
| 552 | |
| 553 | return ret_val; |
| 554 | } |
| 555 | |
| 556 | /** |
| 557 | * ixgbe_check_for_ack_pf - checks to see if the VF has ACKed |
| 558 | * @hw: pointer to the HW structure |
| 559 | * @vf_number: the VF index |
| 560 | * |
| 561 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX |
| 562 | **/ |
| 563 | static s32 ixgbe_check_for_ack_pf(struct ixgbe_hw *hw, u16 vf_number) |
| 564 | { |
| 565 | s32 ret_val = IXGBE_ERR_MBX; |
| 566 | s32 index = IXGBE_MBVFICR_INDEX(vf_number); |
| 567 | u32 vf_bit = vf_number % 16; |
| 568 | |
| 569 | DEBUGFUNC("ixgbe_check_for_ack_pf" ); |
| 570 | |
| 571 | if (!ixgbe_check_for_bit_pf(hw, IXGBE_MBVFICR_VFACK_VF1 << vf_bit, |
| 572 | index)) { |
| 573 | ret_val = IXGBE_SUCCESS; |
| 574 | hw->mbx.stats.acks++; |
| 575 | } |
| 576 | |
| 577 | return ret_val; |
| 578 | } |
| 579 | |
| 580 | /** |
| 581 | * ixgbe_check_for_rst_pf - checks to see if the VF has reset |
| 582 | * @hw: pointer to the HW structure |
| 583 | * @vf_number: the VF index |
| 584 | * |
| 585 | * returns SUCCESS if the VF has set the Status bit or else ERR_MBX |
| 586 | **/ |
| 587 | static s32 ixgbe_check_for_rst_pf(struct ixgbe_hw *hw, u16 vf_number) |
| 588 | { |
| 589 | u32 reg_offset = (vf_number < 32) ? 0 : 1; |
| 590 | u32 vf_shift = vf_number % 32; |
| 591 | u32 vflre = 0; |
| 592 | s32 ret_val = IXGBE_ERR_MBX; |
| 593 | |
| 594 | DEBUGFUNC("ixgbe_check_for_rst_pf" ); |
| 595 | |
| 596 | switch (hw->mac.type) { |
| 597 | case ixgbe_mac_82599EB: |
| 598 | vflre = IXGBE_READ_REG(hw, IXGBE_VFLRE(reg_offset)); |
| 599 | break; |
| 600 | case ixgbe_mac_X540: |
| 601 | vflre = IXGBE_READ_REG(hw, IXGBE_VFLREC(reg_offset)); |
| 602 | break; |
| 603 | default: |
| 604 | break; |
| 605 | } |
| 606 | |
| 607 | if (vflre & (1 << vf_shift)) { |
| 608 | ret_val = IXGBE_SUCCESS; |
| 609 | IXGBE_WRITE_REG(hw, IXGBE_VFLREC(reg_offset), (1 << vf_shift)); |
| 610 | hw->mbx.stats.rsts++; |
| 611 | } |
| 612 | |
| 613 | return ret_val; |
| 614 | } |
| 615 | |
| 616 | /** |
| 617 | * ixgbe_obtain_mbx_lock_pf - obtain mailbox lock |
| 618 | * @hw: pointer to the HW structure |
| 619 | * @vf_number: the VF index |
| 620 | * |
| 621 | * return SUCCESS if we obtained the mailbox lock |
| 622 | **/ |
| 623 | static s32 ixgbe_obtain_mbx_lock_pf(struct ixgbe_hw *hw, u16 vf_number) |
| 624 | { |
| 625 | s32 ret_val = IXGBE_ERR_MBX; |
| 626 | u32 p2v_mailbox; |
| 627 | |
| 628 | DEBUGFUNC("ixgbe_obtain_mbx_lock_pf" ); |
| 629 | |
| 630 | /* Take ownership of the buffer */ |
| 631 | IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_PFU); |
| 632 | |
| 633 | /* reserve mailbox for vf use */ |
| 634 | p2v_mailbox = IXGBE_READ_REG(hw, IXGBE_PFMAILBOX(vf_number)); |
| 635 | if (p2v_mailbox & IXGBE_PFMAILBOX_PFU) |
| 636 | ret_val = IXGBE_SUCCESS; |
| 637 | |
| 638 | return ret_val; |
| 639 | } |
| 640 | |
| 641 | /** |
| 642 | * ixgbe_write_mbx_pf - Places a message in the mailbox |
| 643 | * @hw: pointer to the HW structure |
| 644 | * @msg: The message buffer |
| 645 | * @size: Length of buffer |
| 646 | * @vf_number: the VF index |
| 647 | * |
| 648 | * returns SUCCESS if it successfully copied message into the buffer |
| 649 | **/ |
| 650 | static s32 ixgbe_write_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size, |
| 651 | u16 vf_number) |
| 652 | { |
| 653 | s32 ret_val; |
| 654 | u16 i; |
| 655 | |
| 656 | DEBUGFUNC("ixgbe_write_mbx_pf" ); |
| 657 | |
| 658 | /* lock the mailbox to prevent pf/vf race condition */ |
| 659 | ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number); |
| 660 | if (ret_val) |
| 661 | goto out_no_write; |
| 662 | |
| 663 | /* flush msg and acks as we are overwriting the message buffer */ |
| 664 | ixgbe_check_for_msg_pf(hw, vf_number); |
| 665 | ixgbe_check_for_ack_pf(hw, vf_number); |
| 666 | |
| 667 | /* copy the caller specified message to the mailbox memory buffer */ |
| 668 | for (i = 0; i < size; i++) |
| 669 | IXGBE_WRITE_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i, msg[i]); |
| 670 | |
| 671 | /* Interrupt VF to tell it a message has been sent and release buffer*/ |
| 672 | IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_STS); |
| 673 | |
| 674 | /* update stats */ |
| 675 | hw->mbx.stats.msgs_tx++; |
| 676 | |
| 677 | out_no_write: |
| 678 | return ret_val; |
| 679 | |
| 680 | } |
| 681 | |
| 682 | /** |
| 683 | * ixgbe_read_mbx_pf - Read a message from the mailbox |
| 684 | * @hw: pointer to the HW structure |
| 685 | * @msg: The message buffer |
| 686 | * @size: Length of buffer |
| 687 | * @vf_number: the VF index |
| 688 | * |
| 689 | * This function copies a message from the mailbox buffer to the caller's |
| 690 | * memory buffer. The presumption is that the caller knows that there was |
| 691 | * a message due to a VF request so no polling for message is needed. |
| 692 | **/ |
| 693 | static s32 ixgbe_read_mbx_pf(struct ixgbe_hw *hw, u32 *msg, u16 size, |
| 694 | u16 vf_number) |
| 695 | { |
| 696 | s32 ret_val; |
| 697 | u16 i; |
| 698 | |
| 699 | DEBUGFUNC("ixgbe_read_mbx_pf" ); |
| 700 | |
| 701 | /* lock the mailbox to prevent pf/vf race condition */ |
| 702 | ret_val = ixgbe_obtain_mbx_lock_pf(hw, vf_number); |
| 703 | if (ret_val) |
| 704 | goto out_no_read; |
| 705 | |
| 706 | /* copy the message to the mailbox memory buffer */ |
| 707 | for (i = 0; i < size; i++) |
| 708 | msg[i] = IXGBE_READ_REG_ARRAY(hw, IXGBE_PFMBMEM(vf_number), i); |
| 709 | |
| 710 | /* Acknowledge the message and release buffer */ |
| 711 | IXGBE_WRITE_REG(hw, IXGBE_PFMAILBOX(vf_number), IXGBE_PFMAILBOX_ACK); |
| 712 | |
| 713 | /* update stats */ |
| 714 | hw->mbx.stats.msgs_rx++; |
| 715 | |
| 716 | out_no_read: |
| 717 | return ret_val; |
| 718 | } |
| 719 | |
| 720 | /** |
| 721 | * ixgbe_init_mbx_params_pf - set initial values for pf mailbox |
| 722 | * @hw: pointer to the HW structure |
| 723 | * |
| 724 | * Initializes the hw->mbx struct to correct values for pf mailbox |
| 725 | */ |
| 726 | void ixgbe_init_mbx_params_pf(struct ixgbe_hw *hw) |
| 727 | { |
| 728 | struct ixgbe_mbx_info *mbx = &hw->mbx; |
| 729 | |
| 730 | if (hw->mac.type != ixgbe_mac_82599EB && |
| 731 | hw->mac.type != ixgbe_mac_X540) |
| 732 | return; |
| 733 | |
| 734 | mbx->timeout = 0; |
| 735 | mbx->usec_delay = 0; |
| 736 | |
| 737 | mbx->size = IXGBE_VFMAILBOX_SIZE; |
| 738 | |
| 739 | mbx->ops.read = ixgbe_read_mbx_pf; |
| 740 | mbx->ops.write = ixgbe_write_mbx_pf; |
| 741 | mbx->ops.read_posted = ixgbe_read_posted_mbx; |
| 742 | mbx->ops.write_posted = ixgbe_write_posted_mbx; |
| 743 | mbx->ops.check_for_msg = ixgbe_check_for_msg_pf; |
| 744 | mbx->ops.check_for_ack = ixgbe_check_for_ack_pf; |
| 745 | mbx->ops.check_for_rst = ixgbe_check_for_rst_pf; |
| 746 | |
| 747 | mbx->stats.msgs_tx = 0; |
| 748 | mbx->stats.msgs_rx = 0; |
| 749 | mbx->stats.reqs = 0; |
| 750 | mbx->stats.acks = 0; |
| 751 | mbx->stats.rsts = 0; |
| 752 | } |
| 753 | |