1 /* 2 * RapidIO mport driver for Tsi721 PCIExpress-to-SRIO bridge 3 * 4 * Copyright 2011 Integrated Device Technology, Inc. 5 * Alexandre Bounine <alexandre.bounine@idt.com> 6 * Chul Kim <chul.kim@idt.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the Free 10 * Software Foundation; either version 2 of the License, or (at your option) 11 * any later version. 12 * 13 * This program is distributed in the hope that it will be useful, but WITHOUT 14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 16 * more details. 17 * 18 * You should have received a copy of the GNU General Public License along with 19 * this program; if not, write to the Free Software Foundation, Inc., 59 20 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. 21 */ 22 23 #include <linux/io.h> 24 #include <linux/errno.h> 25 #include <linux/init.h> 26 #include <linux/ioport.h> 27 #include <linux/kernel.h> 28 #include <linux/module.h> 29 #include <linux/pci.h> 30 #include <linux/rio.h> 31 #include <linux/rio_drv.h> 32 #include <linux/dma-mapping.h> 33 #include <linux/interrupt.h> 34 #include <linux/kfifo.h> 35 #include <linux/delay.h> 36 37 #include "tsi721.h" 38 39 #ifdef DEBUG 40 u32 tsi_dbg_level; 41 module_param_named(dbg_level, tsi_dbg_level, uint, S_IWUSR | S_IRUGO); 42 MODULE_PARM_DESC(dbg_level, "Debugging output level (default 0 = none)"); 43 #endif 44 45 static int pcie_mrrs = -1; 46 module_param(pcie_mrrs, int, S_IRUGO); 47 MODULE_PARM_DESC(pcie_mrrs, "PCIe MRRS override value (0...5)"); 48 49 static u8 mbox_sel = 0x0f; 50 module_param(mbox_sel, byte, S_IRUGO); 51 MODULE_PARM_DESC(mbox_sel, 52 "RIO Messaging MBOX Selection Mask (default: 0x0f = all)"); 53 54 static DEFINE_SPINLOCK(tsi721_maint_lock); 55 56 static void tsi721_omsg_handler(struct tsi721_device *priv, int ch); 57 static void tsi721_imsg_handler(struct tsi721_device *priv, int ch); 58 59 /** 60 * tsi721_lcread - read from local SREP config space 61 * @mport: RapidIO master port info 62 * @index: ID of RapdiIO interface 63 * @offset: Offset into configuration space 64 * @len: Length (in bytes) of the maintenance transaction 65 * @data: Value to be read into 66 * 67 * Generates a local SREP space read. Returns %0 on 68 * success or %-EINVAL on failure. 69 */ 70 static int tsi721_lcread(struct rio_mport *mport, int index, u32 offset, 71 int len, u32 *data) 72 { 73 struct tsi721_device *priv = mport->priv; 74 75 if (len != sizeof(u32)) 76 return -EINVAL; /* only 32-bit access is supported */ 77 78 *data = ioread32(priv->regs + offset); 79 80 return 0; 81 } 82 83 /** 84 * tsi721_lcwrite - write into local SREP config space 85 * @mport: RapidIO master port info 86 * @index: ID of RapdiIO interface 87 * @offset: Offset into configuration space 88 * @len: Length (in bytes) of the maintenance transaction 89 * @data: Value to be written 90 * 91 * Generates a local write into SREP configuration space. Returns %0 on 92 * success or %-EINVAL on failure. 93 */ 94 static int tsi721_lcwrite(struct rio_mport *mport, int index, u32 offset, 95 int len, u32 data) 96 { 97 struct tsi721_device *priv = mport->priv; 98 99 if (len != sizeof(u32)) 100 return -EINVAL; /* only 32-bit access is supported */ 101 102 iowrite32(data, priv->regs + offset); 103 104 return 0; 105 } 106 107 /** 108 * tsi721_maint_dma - Helper function to generate RapidIO maintenance 109 * transactions using designated Tsi721 DMA channel. 110 * @priv: pointer to tsi721 private data 111 * @sys_size: RapdiIO transport system size 112 * @destid: Destination ID of transaction 113 * @hopcount: Number of hops to target device 114 * @offset: Offset into configuration space 115 * @len: Length (in bytes) of the maintenance transaction 116 * @data: Location to be read from or write into 117 * @do_wr: Operation flag (1 == MAINT_WR) 118 * 119 * Generates a RapidIO maintenance transaction (Read or Write). 120 * Returns %0 on success and %-EINVAL or %-EFAULT on failure. 121 */ 122 static int tsi721_maint_dma(struct tsi721_device *priv, u32 sys_size, 123 u16 destid, u8 hopcount, u32 offset, int len, 124 u32 *data, int do_wr) 125 { 126 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(priv->mdma.ch_id); 127 struct tsi721_dma_desc *bd_ptr; 128 u32 rd_count, swr_ptr, ch_stat; 129 unsigned long flags; 130 int i, err = 0; 131 u32 op = do_wr ? MAINT_WR : MAINT_RD; 132 133 if (offset > (RIO_MAINT_SPACE_SZ - len) || (len != sizeof(u32))) 134 return -EINVAL; 135 136 spin_lock_irqsave(&tsi721_maint_lock, flags); 137 138 bd_ptr = priv->mdma.bd_base; 139 140 rd_count = ioread32(regs + TSI721_DMAC_DRDCNT); 141 142 /* Initialize DMA descriptor */ 143 bd_ptr[0].type_id = cpu_to_le32((DTYPE2 << 29) | (op << 19) | destid); 144 bd_ptr[0].bcount = cpu_to_le32((sys_size << 26) | 0x04); 145 bd_ptr[0].raddr_lo = cpu_to_le32((hopcount << 24) | offset); 146 bd_ptr[0].raddr_hi = 0; 147 if (do_wr) 148 bd_ptr[0].data[0] = cpu_to_be32p(data); 149 else 150 bd_ptr[0].data[0] = 0xffffffff; 151 152 mb(); 153 154 /* Start DMA operation */ 155 iowrite32(rd_count + 2, regs + TSI721_DMAC_DWRCNT); 156 ioread32(regs + TSI721_DMAC_DWRCNT); 157 i = 0; 158 159 /* Wait until DMA transfer is finished */ 160 while ((ch_stat = ioread32(regs + TSI721_DMAC_STS)) 161 & TSI721_DMAC_STS_RUN) { 162 udelay(1); 163 if (++i >= 5000000) { 164 tsi_debug(MAINT, &priv->pdev->dev, 165 "DMA[%d] read timeout ch_status=%x", 166 priv->mdma.ch_id, ch_stat); 167 if (!do_wr) 168 *data = 0xffffffff; 169 err = -EIO; 170 goto err_out; 171 } 172 } 173 174 if (ch_stat & TSI721_DMAC_STS_ABORT) { 175 /* If DMA operation aborted due to error, 176 * reinitialize DMA channel 177 */ 178 tsi_debug(MAINT, &priv->pdev->dev, "DMA ABORT ch_stat=%x", 179 ch_stat); 180 tsi_debug(MAINT, &priv->pdev->dev, 181 "OP=%d : destid=%x hc=%x off=%x", 182 do_wr ? MAINT_WR : MAINT_RD, 183 destid, hopcount, offset); 184 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT); 185 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL); 186 udelay(10); 187 iowrite32(0, regs + TSI721_DMAC_DWRCNT); 188 udelay(1); 189 if (!do_wr) 190 *data = 0xffffffff; 191 err = -EIO; 192 goto err_out; 193 } 194 195 if (!do_wr) 196 *data = be32_to_cpu(bd_ptr[0].data[0]); 197 198 /* 199 * Update descriptor status FIFO RD pointer. 200 * NOTE: Skipping check and clear FIFO entries because we are waiting 201 * for transfer to be completed. 202 */ 203 swr_ptr = ioread32(regs + TSI721_DMAC_DSWP); 204 iowrite32(swr_ptr, regs + TSI721_DMAC_DSRP); 205 206 err_out: 207 spin_unlock_irqrestore(&tsi721_maint_lock, flags); 208 209 return err; 210 } 211 212 /** 213 * tsi721_cread_dma - Generate a RapidIO maintenance read transaction 214 * using Tsi721 BDMA engine. 215 * @mport: RapidIO master port control structure 216 * @index: ID of RapdiIO interface 217 * @destid: Destination ID of transaction 218 * @hopcount: Number of hops to target device 219 * @offset: Offset into configuration space 220 * @len: Length (in bytes) of the maintenance transaction 221 * @val: Location to be read into 222 * 223 * Generates a RapidIO maintenance read transaction. 224 * Returns %0 on success and %-EINVAL or %-EFAULT on failure. 225 */ 226 static int tsi721_cread_dma(struct rio_mport *mport, int index, u16 destid, 227 u8 hopcount, u32 offset, int len, u32 *data) 228 { 229 struct tsi721_device *priv = mport->priv; 230 231 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount, 232 offset, len, data, 0); 233 } 234 235 /** 236 * tsi721_cwrite_dma - Generate a RapidIO maintenance write transaction 237 * using Tsi721 BDMA engine 238 * @mport: RapidIO master port control structure 239 * @index: ID of RapdiIO interface 240 * @destid: Destination ID of transaction 241 * @hopcount: Number of hops to target device 242 * @offset: Offset into configuration space 243 * @len: Length (in bytes) of the maintenance transaction 244 * @val: Value to be written 245 * 246 * Generates a RapidIO maintenance write transaction. 247 * Returns %0 on success and %-EINVAL or %-EFAULT on failure. 248 */ 249 static int tsi721_cwrite_dma(struct rio_mport *mport, int index, u16 destid, 250 u8 hopcount, u32 offset, int len, u32 data) 251 { 252 struct tsi721_device *priv = mport->priv; 253 u32 temp = data; 254 255 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount, 256 offset, len, &temp, 1); 257 } 258 259 /** 260 * tsi721_pw_handler - Tsi721 inbound port-write interrupt handler 261 * @priv: tsi721 device private structure 262 * 263 * Handles inbound port-write interrupts. Copies PW message from an internal 264 * buffer into PW message FIFO and schedules deferred routine to process 265 * queued messages. 266 */ 267 static int 268 tsi721_pw_handler(struct tsi721_device *priv) 269 { 270 u32 pw_stat; 271 u32 pw_buf[TSI721_RIO_PW_MSG_SIZE/sizeof(u32)]; 272 273 274 pw_stat = ioread32(priv->regs + TSI721_RIO_PW_RX_STAT); 275 276 if (pw_stat & TSI721_RIO_PW_RX_STAT_PW_VAL) { 277 pw_buf[0] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(0)); 278 pw_buf[1] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(1)); 279 pw_buf[2] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(2)); 280 pw_buf[3] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(3)); 281 282 /* Queue PW message (if there is room in FIFO), 283 * otherwise discard it. 284 */ 285 spin_lock(&priv->pw_fifo_lock); 286 if (kfifo_avail(&priv->pw_fifo) >= TSI721_RIO_PW_MSG_SIZE) 287 kfifo_in(&priv->pw_fifo, pw_buf, 288 TSI721_RIO_PW_MSG_SIZE); 289 else 290 priv->pw_discard_count++; 291 spin_unlock(&priv->pw_fifo_lock); 292 } 293 294 /* Clear pending PW interrupts */ 295 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL, 296 priv->regs + TSI721_RIO_PW_RX_STAT); 297 298 schedule_work(&priv->pw_work); 299 300 return 0; 301 } 302 303 static void tsi721_pw_dpc(struct work_struct *work) 304 { 305 struct tsi721_device *priv = container_of(work, struct tsi721_device, 306 pw_work); 307 union rio_pw_msg pwmsg; 308 309 /* 310 * Process port-write messages 311 */ 312 while (kfifo_out_spinlocked(&priv->pw_fifo, (unsigned char *)&pwmsg, 313 TSI721_RIO_PW_MSG_SIZE, &priv->pw_fifo_lock)) { 314 /* Pass the port-write message to RIO core for processing */ 315 rio_inb_pwrite_handler(&priv->mport, &pwmsg); 316 } 317 } 318 319 /** 320 * tsi721_pw_enable - enable/disable port-write interface init 321 * @mport: Master port implementing the port write unit 322 * @enable: 1=enable; 0=disable port-write message handling 323 */ 324 static int tsi721_pw_enable(struct rio_mport *mport, int enable) 325 { 326 struct tsi721_device *priv = mport->priv; 327 u32 rval; 328 329 rval = ioread32(priv->regs + TSI721_RIO_EM_INT_ENABLE); 330 331 if (enable) 332 rval |= TSI721_RIO_EM_INT_ENABLE_PW_RX; 333 else 334 rval &= ~TSI721_RIO_EM_INT_ENABLE_PW_RX; 335 336 /* Clear pending PW interrupts */ 337 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL, 338 priv->regs + TSI721_RIO_PW_RX_STAT); 339 /* Update enable bits */ 340 iowrite32(rval, priv->regs + TSI721_RIO_EM_INT_ENABLE); 341 342 return 0; 343 } 344 345 /** 346 * tsi721_dsend - Send a RapidIO doorbell 347 * @mport: RapidIO master port info 348 * @index: ID of RapidIO interface 349 * @destid: Destination ID of target device 350 * @data: 16-bit info field of RapidIO doorbell 351 * 352 * Sends a RapidIO doorbell message. Always returns %0. 353 */ 354 static int tsi721_dsend(struct rio_mport *mport, int index, 355 u16 destid, u16 data) 356 { 357 struct tsi721_device *priv = mport->priv; 358 u32 offset; 359 360 offset = (((mport->sys_size) ? RIO_TT_CODE_16 : RIO_TT_CODE_8) << 18) | 361 (destid << 2); 362 363 tsi_debug(DBELL, &priv->pdev->dev, 364 "Send Doorbell 0x%04x to destID 0x%x", data, destid); 365 iowrite16be(data, priv->odb_base + offset); 366 367 return 0; 368 } 369 370 /** 371 * tsi721_dbell_handler - Tsi721 doorbell interrupt handler 372 * @priv: tsi721 device-specific data structure 373 * 374 * Handles inbound doorbell interrupts. Copies doorbell entry from an internal 375 * buffer into DB message FIFO and schedules deferred routine to process 376 * queued DBs. 377 */ 378 static int 379 tsi721_dbell_handler(struct tsi721_device *priv) 380 { 381 u32 regval; 382 383 /* Disable IDB interrupts */ 384 regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); 385 regval &= ~TSI721_SR_CHINT_IDBQRCV; 386 iowrite32(regval, 387 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); 388 389 schedule_work(&priv->idb_work); 390 391 return 0; 392 } 393 394 static void tsi721_db_dpc(struct work_struct *work) 395 { 396 struct tsi721_device *priv = container_of(work, struct tsi721_device, 397 idb_work); 398 struct rio_mport *mport; 399 struct rio_dbell *dbell; 400 int found = 0; 401 u32 wr_ptr, rd_ptr; 402 u64 *idb_entry; 403 u32 regval; 404 union { 405 u64 msg; 406 u8 bytes[8]; 407 } idb; 408 409 /* 410 * Process queued inbound doorbells 411 */ 412 mport = &priv->mport; 413 414 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE; 415 rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE; 416 417 while (wr_ptr != rd_ptr) { 418 idb_entry = (u64 *)(priv->idb_base + 419 (TSI721_IDB_ENTRY_SIZE * rd_ptr)); 420 rd_ptr++; 421 rd_ptr %= IDB_QSIZE; 422 idb.msg = *idb_entry; 423 *idb_entry = 0; 424 425 /* Process one doorbell */ 426 list_for_each_entry(dbell, &mport->dbells, node) { 427 if ((dbell->res->start <= DBELL_INF(idb.bytes)) && 428 (dbell->res->end >= DBELL_INF(idb.bytes))) { 429 found = 1; 430 break; 431 } 432 } 433 434 if (found) { 435 dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes), 436 DBELL_TID(idb.bytes), DBELL_INF(idb.bytes)); 437 } else { 438 tsi_debug(DBELL, &priv->pdev->dev, 439 "spurious IDB sid %2.2x tid %2.2x info %4.4x", 440 DBELL_SID(idb.bytes), DBELL_TID(idb.bytes), 441 DBELL_INF(idb.bytes)); 442 } 443 444 wr_ptr = ioread32(priv->regs + 445 TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE; 446 } 447 448 iowrite32(rd_ptr & (IDB_QSIZE - 1), 449 priv->regs + TSI721_IDQ_RP(IDB_QUEUE)); 450 451 /* Re-enable IDB interrupts */ 452 regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); 453 regval |= TSI721_SR_CHINT_IDBQRCV; 454 iowrite32(regval, 455 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); 456 457 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE; 458 if (wr_ptr != rd_ptr) 459 schedule_work(&priv->idb_work); 460 } 461 462 /** 463 * tsi721_irqhandler - Tsi721 interrupt handler 464 * @irq: Linux interrupt number 465 * @ptr: Pointer to interrupt-specific data (tsi721_device structure) 466 * 467 * Handles Tsi721 interrupts signaled using MSI and INTA. Checks reported 468 * interrupt events and calls an event-specific handler(s). 469 */ 470 static irqreturn_t tsi721_irqhandler(int irq, void *ptr) 471 { 472 struct tsi721_device *priv = (struct tsi721_device *)ptr; 473 u32 dev_int; 474 u32 dev_ch_int; 475 u32 intval; 476 u32 ch_inte; 477 478 /* For MSI mode disable all device-level interrupts */ 479 if (priv->flags & TSI721_USING_MSI) 480 iowrite32(0, priv->regs + TSI721_DEV_INTE); 481 482 dev_int = ioread32(priv->regs + TSI721_DEV_INT); 483 if (!dev_int) 484 return IRQ_NONE; 485 486 dev_ch_int = ioread32(priv->regs + TSI721_DEV_CHAN_INT); 487 488 if (dev_int & TSI721_DEV_INT_SR2PC_CH) { 489 /* Service SR2PC Channel interrupts */ 490 if (dev_ch_int & TSI721_INT_SR2PC_CHAN(IDB_QUEUE)) { 491 /* Service Inbound Doorbell interrupt */ 492 intval = ioread32(priv->regs + 493 TSI721_SR_CHINT(IDB_QUEUE)); 494 if (intval & TSI721_SR_CHINT_IDBQRCV) 495 tsi721_dbell_handler(priv); 496 else 497 tsi_info(&priv->pdev->dev, 498 "Unsupported SR_CH_INT %x", intval); 499 500 /* Clear interrupts */ 501 iowrite32(intval, 502 priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); 503 ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); 504 } 505 } 506 507 if (dev_int & TSI721_DEV_INT_SMSG_CH) { 508 int ch; 509 510 /* 511 * Service channel interrupts from Messaging Engine 512 */ 513 514 if (dev_ch_int & TSI721_INT_IMSG_CHAN_M) { /* Inbound Msg */ 515 /* Disable signaled OB MSG Channel interrupts */ 516 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 517 ch_inte &= ~(dev_ch_int & TSI721_INT_IMSG_CHAN_M); 518 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); 519 520 /* 521 * Process Inbound Message interrupt for each MBOX 522 */ 523 for (ch = 4; ch < RIO_MAX_MBOX + 4; ch++) { 524 if (!(dev_ch_int & TSI721_INT_IMSG_CHAN(ch))) 525 continue; 526 tsi721_imsg_handler(priv, ch); 527 } 528 } 529 530 if (dev_ch_int & TSI721_INT_OMSG_CHAN_M) { /* Outbound Msg */ 531 /* Disable signaled OB MSG Channel interrupts */ 532 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 533 ch_inte &= ~(dev_ch_int & TSI721_INT_OMSG_CHAN_M); 534 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); 535 536 /* 537 * Process Outbound Message interrupts for each MBOX 538 */ 539 540 for (ch = 0; ch < RIO_MAX_MBOX; ch++) { 541 if (!(dev_ch_int & TSI721_INT_OMSG_CHAN(ch))) 542 continue; 543 tsi721_omsg_handler(priv, ch); 544 } 545 } 546 } 547 548 if (dev_int & TSI721_DEV_INT_SRIO) { 549 /* Service SRIO MAC interrupts */ 550 intval = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT); 551 if (intval & TSI721_RIO_EM_INT_STAT_PW_RX) 552 tsi721_pw_handler(priv); 553 } 554 555 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 556 if (dev_int & TSI721_DEV_INT_BDMA_CH) { 557 int ch; 558 559 if (dev_ch_int & TSI721_INT_BDMA_CHAN_M) { 560 tsi_debug(DMA, &priv->pdev->dev, 561 "IRQ from DMA channel 0x%08x", dev_ch_int); 562 563 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++) { 564 if (!(dev_ch_int & TSI721_INT_BDMA_CHAN(ch))) 565 continue; 566 tsi721_bdma_handler(&priv->bdma[ch]); 567 } 568 } 569 } 570 #endif 571 572 /* For MSI mode re-enable device-level interrupts */ 573 if (priv->flags & TSI721_USING_MSI) { 574 dev_int = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO | 575 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH; 576 iowrite32(dev_int, priv->regs + TSI721_DEV_INTE); 577 } 578 579 return IRQ_HANDLED; 580 } 581 582 static void tsi721_interrupts_init(struct tsi721_device *priv) 583 { 584 u32 intr; 585 586 /* Enable IDB interrupts */ 587 iowrite32(TSI721_SR_CHINT_ALL, 588 priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); 589 iowrite32(TSI721_SR_CHINT_IDBQRCV, 590 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); 591 592 /* Enable SRIO MAC interrupts */ 593 iowrite32(TSI721_RIO_EM_DEV_INT_EN_INT, 594 priv->regs + TSI721_RIO_EM_DEV_INT_EN); 595 596 /* Enable interrupts from channels in use */ 597 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 598 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE) | 599 (TSI721_INT_BDMA_CHAN_M & 600 ~TSI721_INT_BDMA_CHAN(TSI721_DMACH_MAINT)); 601 #else 602 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE); 603 #endif 604 iowrite32(intr, priv->regs + TSI721_DEV_CHAN_INTE); 605 606 if (priv->flags & TSI721_USING_MSIX) 607 intr = TSI721_DEV_INT_SRIO; 608 else 609 intr = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO | 610 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH; 611 612 iowrite32(intr, priv->regs + TSI721_DEV_INTE); 613 ioread32(priv->regs + TSI721_DEV_INTE); 614 } 615 616 #ifdef CONFIG_PCI_MSI 617 /** 618 * tsi721_omsg_msix - MSI-X interrupt handler for outbound messaging 619 * @irq: Linux interrupt number 620 * @ptr: Pointer to interrupt-specific data (tsi721_device structure) 621 * 622 * Handles outbound messaging interrupts signaled using MSI-X. 623 */ 624 static irqreturn_t tsi721_omsg_msix(int irq, void *ptr) 625 { 626 struct tsi721_device *priv = (struct tsi721_device *)ptr; 627 int mbox; 628 629 mbox = (irq - priv->msix[TSI721_VECT_OMB0_DONE].vector) % RIO_MAX_MBOX; 630 tsi721_omsg_handler(priv, mbox); 631 return IRQ_HANDLED; 632 } 633 634 /** 635 * tsi721_imsg_msix - MSI-X interrupt handler for inbound messaging 636 * @irq: Linux interrupt number 637 * @ptr: Pointer to interrupt-specific data (tsi721_device structure) 638 * 639 * Handles inbound messaging interrupts signaled using MSI-X. 640 */ 641 static irqreturn_t tsi721_imsg_msix(int irq, void *ptr) 642 { 643 struct tsi721_device *priv = (struct tsi721_device *)ptr; 644 int mbox; 645 646 mbox = (irq - priv->msix[TSI721_VECT_IMB0_RCV].vector) % RIO_MAX_MBOX; 647 tsi721_imsg_handler(priv, mbox + 4); 648 return IRQ_HANDLED; 649 } 650 651 /** 652 * tsi721_srio_msix - Tsi721 MSI-X SRIO MAC interrupt handler 653 * @irq: Linux interrupt number 654 * @ptr: Pointer to interrupt-specific data (tsi721_device structure) 655 * 656 * Handles Tsi721 interrupts from SRIO MAC. 657 */ 658 static irqreturn_t tsi721_srio_msix(int irq, void *ptr) 659 { 660 struct tsi721_device *priv = (struct tsi721_device *)ptr; 661 u32 srio_int; 662 663 /* Service SRIO MAC interrupts */ 664 srio_int = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT); 665 if (srio_int & TSI721_RIO_EM_INT_STAT_PW_RX) 666 tsi721_pw_handler(priv); 667 668 return IRQ_HANDLED; 669 } 670 671 /** 672 * tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler 673 * @irq: Linux interrupt number 674 * @ptr: Pointer to interrupt-specific data (tsi721_device structure) 675 * 676 * Handles Tsi721 interrupts from SR2PC Channel. 677 * NOTE: At this moment services only one SR2PC channel associated with inbound 678 * doorbells. 679 */ 680 static irqreturn_t tsi721_sr2pc_ch_msix(int irq, void *ptr) 681 { 682 struct tsi721_device *priv = (struct tsi721_device *)ptr; 683 u32 sr_ch_int; 684 685 /* Service Inbound DB interrupt from SR2PC channel */ 686 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); 687 if (sr_ch_int & TSI721_SR_CHINT_IDBQRCV) 688 tsi721_dbell_handler(priv); 689 690 /* Clear interrupts */ 691 iowrite32(sr_ch_int, priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); 692 /* Read back to ensure that interrupt was cleared */ 693 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); 694 695 return IRQ_HANDLED; 696 } 697 698 /** 699 * tsi721_request_msix - register interrupt service for MSI-X mode. 700 * @priv: tsi721 device-specific data structure 701 * 702 * Registers MSI-X interrupt service routines for interrupts that are active 703 * immediately after mport initialization. Messaging interrupt service routines 704 * should be registered during corresponding open requests. 705 */ 706 static int tsi721_request_msix(struct tsi721_device *priv) 707 { 708 int err = 0; 709 710 err = request_irq(priv->msix[TSI721_VECT_IDB].vector, 711 tsi721_sr2pc_ch_msix, 0, 712 priv->msix[TSI721_VECT_IDB].irq_name, (void *)priv); 713 if (err) 714 return err; 715 716 err = request_irq(priv->msix[TSI721_VECT_PWRX].vector, 717 tsi721_srio_msix, 0, 718 priv->msix[TSI721_VECT_PWRX].irq_name, (void *)priv); 719 if (err) { 720 free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv); 721 return err; 722 } 723 724 return 0; 725 } 726 727 /** 728 * tsi721_enable_msix - Attempts to enable MSI-X support for Tsi721. 729 * @priv: pointer to tsi721 private data 730 * 731 * Configures MSI-X support for Tsi721. Supports only an exact number 732 * of requested vectors. 733 */ 734 static int tsi721_enable_msix(struct tsi721_device *priv) 735 { 736 struct msix_entry entries[TSI721_VECT_MAX]; 737 int err; 738 int i; 739 740 entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE); 741 entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT; 742 743 /* 744 * Initialize MSI-X entries for Messaging Engine: 745 * this driver supports four RIO mailboxes (inbound and outbound) 746 * NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore 747 * offset +4 is added to IB MBOX number. 748 */ 749 for (i = 0; i < RIO_MAX_MBOX; i++) { 750 entries[TSI721_VECT_IMB0_RCV + i].entry = 751 TSI721_MSIX_IMSG_DQ_RCV(i + 4); 752 entries[TSI721_VECT_IMB0_INT + i].entry = 753 TSI721_MSIX_IMSG_INT(i + 4); 754 entries[TSI721_VECT_OMB0_DONE + i].entry = 755 TSI721_MSIX_OMSG_DONE(i); 756 entries[TSI721_VECT_OMB0_INT + i].entry = 757 TSI721_MSIX_OMSG_INT(i); 758 } 759 760 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 761 /* 762 * Initialize MSI-X entries for Block DMA Engine: 763 * this driver supports XXX DMA channels 764 * (one is reserved for SRIO maintenance transactions) 765 */ 766 for (i = 0; i < TSI721_DMA_CHNUM; i++) { 767 entries[TSI721_VECT_DMA0_DONE + i].entry = 768 TSI721_MSIX_DMACH_DONE(i); 769 entries[TSI721_VECT_DMA0_INT + i].entry = 770 TSI721_MSIX_DMACH_INT(i); 771 } 772 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ 773 774 err = pci_enable_msix_exact(priv->pdev, entries, ARRAY_SIZE(entries)); 775 if (err) { 776 tsi_err(&priv->pdev->dev, 777 "Failed to enable MSI-X (err=%d)", err); 778 return err; 779 } 780 781 /* 782 * Copy MSI-X vector information into tsi721 private structure 783 */ 784 priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector; 785 snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX, 786 DRV_NAME "-idb@pci:%s", pci_name(priv->pdev)); 787 priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector; 788 snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX, 789 DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev)); 790 791 for (i = 0; i < RIO_MAX_MBOX; i++) { 792 priv->msix[TSI721_VECT_IMB0_RCV + i].vector = 793 entries[TSI721_VECT_IMB0_RCV + i].vector; 794 snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name, 795 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s", 796 i, pci_name(priv->pdev)); 797 798 priv->msix[TSI721_VECT_IMB0_INT + i].vector = 799 entries[TSI721_VECT_IMB0_INT + i].vector; 800 snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name, 801 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s", 802 i, pci_name(priv->pdev)); 803 804 priv->msix[TSI721_VECT_OMB0_DONE + i].vector = 805 entries[TSI721_VECT_OMB0_DONE + i].vector; 806 snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name, 807 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s", 808 i, pci_name(priv->pdev)); 809 810 priv->msix[TSI721_VECT_OMB0_INT + i].vector = 811 entries[TSI721_VECT_OMB0_INT + i].vector; 812 snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name, 813 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s", 814 i, pci_name(priv->pdev)); 815 } 816 817 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 818 for (i = 0; i < TSI721_DMA_CHNUM; i++) { 819 priv->msix[TSI721_VECT_DMA0_DONE + i].vector = 820 entries[TSI721_VECT_DMA0_DONE + i].vector; 821 snprintf(priv->msix[TSI721_VECT_DMA0_DONE + i].irq_name, 822 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmad%d@pci:%s", 823 i, pci_name(priv->pdev)); 824 825 priv->msix[TSI721_VECT_DMA0_INT + i].vector = 826 entries[TSI721_VECT_DMA0_INT + i].vector; 827 snprintf(priv->msix[TSI721_VECT_DMA0_INT + i].irq_name, 828 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmai%d@pci:%s", 829 i, pci_name(priv->pdev)); 830 } 831 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */ 832 833 return 0; 834 } 835 #endif /* CONFIG_PCI_MSI */ 836 837 static int tsi721_request_irq(struct tsi721_device *priv) 838 { 839 int err; 840 841 #ifdef CONFIG_PCI_MSI 842 if (priv->flags & TSI721_USING_MSIX) 843 err = tsi721_request_msix(priv); 844 else 845 #endif 846 err = request_irq(priv->pdev->irq, tsi721_irqhandler, 847 (priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED, 848 DRV_NAME, (void *)priv); 849 850 if (err) 851 tsi_err(&priv->pdev->dev, 852 "Unable to allocate interrupt, err=%d", err); 853 854 return err; 855 } 856 857 static void tsi721_free_irq(struct tsi721_device *priv) 858 { 859 #ifdef CONFIG_PCI_MSI 860 if (priv->flags & TSI721_USING_MSIX) { 861 free_irq(priv->msix[TSI721_VECT_IDB].vector, (void *)priv); 862 free_irq(priv->msix[TSI721_VECT_PWRX].vector, (void *)priv); 863 } else 864 #endif 865 free_irq(priv->pdev->irq, (void *)priv); 866 } 867 868 static int 869 tsi721_obw_alloc(struct tsi721_device *priv, struct tsi721_obw_bar *pbar, 870 u32 size, int *win_id) 871 { 872 u64 win_base; 873 u64 bar_base; 874 u64 bar_end; 875 u32 align; 876 struct tsi721_ob_win *win; 877 struct tsi721_ob_win *new_win = NULL; 878 int new_win_idx = -1; 879 int i = 0; 880 881 bar_base = pbar->base; 882 bar_end = bar_base + pbar->size; 883 win_base = bar_base; 884 align = size/TSI721_PC2SR_ZONES; 885 886 while (i < TSI721_IBWIN_NUM) { 887 for (i = 0; i < TSI721_IBWIN_NUM; i++) { 888 if (!priv->ob_win[i].active) { 889 if (new_win == NULL) { 890 new_win = &priv->ob_win[i]; 891 new_win_idx = i; 892 } 893 continue; 894 } 895 896 /* 897 * If this window belongs to the current BAR check it 898 * for overlap 899 */ 900 win = &priv->ob_win[i]; 901 902 if (win->base >= bar_base && win->base < bar_end) { 903 if (win_base < (win->base + win->size) && 904 (win_base + size) > win->base) { 905 /* Overlap detected */ 906 win_base = win->base + win->size; 907 win_base = ALIGN(win_base, align); 908 break; 909 } 910 } 911 } 912 } 913 914 if (win_base + size > bar_end) 915 return -ENOMEM; 916 917 if (!new_win) { 918 tsi_err(&priv->pdev->dev, "OBW count tracking failed"); 919 return -EIO; 920 } 921 922 new_win->active = true; 923 new_win->base = win_base; 924 new_win->size = size; 925 new_win->pbar = pbar; 926 priv->obwin_cnt--; 927 pbar->free -= size; 928 *win_id = new_win_idx; 929 return 0; 930 } 931 932 static int tsi721_map_outb_win(struct rio_mport *mport, u16 destid, u64 rstart, 933 u32 size, u32 flags, dma_addr_t *laddr) 934 { 935 struct tsi721_device *priv = mport->priv; 936 int i; 937 struct tsi721_obw_bar *pbar; 938 struct tsi721_ob_win *ob_win; 939 int obw = -1; 940 u32 rval; 941 u64 rio_addr; 942 u32 zsize; 943 int ret = -ENOMEM; 944 945 tsi_debug(OBW, &priv->pdev->dev, 946 "did=%d ra=0x%llx sz=0x%x", destid, rstart, size); 947 948 if (!is_power_of_2(size) || (size < 0x8000) || (rstart & (size - 1))) 949 return -EINVAL; 950 951 if (priv->obwin_cnt == 0) 952 return -EBUSY; 953 954 for (i = 0; i < 2; i++) { 955 if (priv->p2r_bar[i].free >= size) { 956 pbar = &priv->p2r_bar[i]; 957 ret = tsi721_obw_alloc(priv, pbar, size, &obw); 958 if (!ret) 959 break; 960 } 961 } 962 963 if (ret) 964 return ret; 965 966 WARN_ON(obw == -1); 967 ob_win = &priv->ob_win[obw]; 968 ob_win->destid = destid; 969 ob_win->rstart = rstart; 970 tsi_debug(OBW, &priv->pdev->dev, 971 "allocated OBW%d @%llx", obw, ob_win->base); 972 973 /* 974 * Configure Outbound Window 975 */ 976 977 zsize = size/TSI721_PC2SR_ZONES; 978 rio_addr = rstart; 979 980 /* 981 * Program Address Translation Zones: 982 * This implementation uses all 8 zones associated wit window. 983 */ 984 for (i = 0; i < TSI721_PC2SR_ZONES; i++) { 985 986 while (ioread32(priv->regs + TSI721_ZONE_SEL) & 987 TSI721_ZONE_SEL_GO) { 988 udelay(1); 989 } 990 991 rval = (u32)(rio_addr & TSI721_LUT_DATA0_ADD) | 992 TSI721_LUT_DATA0_NREAD | TSI721_LUT_DATA0_NWR; 993 iowrite32(rval, priv->regs + TSI721_LUT_DATA0); 994 rval = (u32)(rio_addr >> 32); 995 iowrite32(rval, priv->regs + TSI721_LUT_DATA1); 996 rval = destid; 997 iowrite32(rval, priv->regs + TSI721_LUT_DATA2); 998 999 rval = TSI721_ZONE_SEL_GO | (obw << 3) | i; 1000 iowrite32(rval, priv->regs + TSI721_ZONE_SEL); 1001 1002 rio_addr += zsize; 1003 } 1004 1005 iowrite32(TSI721_OBWIN_SIZE(size) << 8, 1006 priv->regs + TSI721_OBWINSZ(obw)); 1007 iowrite32((u32)(ob_win->base >> 32), priv->regs + TSI721_OBWINUB(obw)); 1008 iowrite32((u32)(ob_win->base & TSI721_OBWINLB_BA) | TSI721_OBWINLB_WEN, 1009 priv->regs + TSI721_OBWINLB(obw)); 1010 1011 *laddr = ob_win->base; 1012 return 0; 1013 } 1014 1015 static void tsi721_unmap_outb_win(struct rio_mport *mport, 1016 u16 destid, u64 rstart) 1017 { 1018 struct tsi721_device *priv = mport->priv; 1019 struct tsi721_ob_win *ob_win; 1020 int i; 1021 1022 tsi_debug(OBW, &priv->pdev->dev, "did=%d ra=0x%llx", destid, rstart); 1023 1024 for (i = 0; i < TSI721_OBWIN_NUM; i++) { 1025 ob_win = &priv->ob_win[i]; 1026 1027 if (ob_win->active && 1028 ob_win->destid == destid && ob_win->rstart == rstart) { 1029 tsi_debug(OBW, &priv->pdev->dev, 1030 "free OBW%d @%llx", i, ob_win->base); 1031 ob_win->active = false; 1032 iowrite32(0, priv->regs + TSI721_OBWINLB(i)); 1033 ob_win->pbar->free += ob_win->size; 1034 priv->obwin_cnt++; 1035 break; 1036 } 1037 } 1038 } 1039 1040 /** 1041 * tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO) 1042 * translation regions. 1043 * @priv: pointer to tsi721 private data 1044 * 1045 * Disables SREP translation regions. 1046 */ 1047 static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv) 1048 { 1049 int i, z; 1050 u32 rval; 1051 1052 /* Disable all PC2SR translation windows */ 1053 for (i = 0; i < TSI721_OBWIN_NUM; i++) 1054 iowrite32(0, priv->regs + TSI721_OBWINLB(i)); 1055 1056 /* Initialize zone lookup tables to avoid ECC errors on reads */ 1057 iowrite32(0, priv->regs + TSI721_LUT_DATA0); 1058 iowrite32(0, priv->regs + TSI721_LUT_DATA1); 1059 iowrite32(0, priv->regs + TSI721_LUT_DATA2); 1060 1061 for (i = 0; i < TSI721_OBWIN_NUM; i++) { 1062 for (z = 0; z < TSI721_PC2SR_ZONES; z++) { 1063 while (ioread32(priv->regs + TSI721_ZONE_SEL) & 1064 TSI721_ZONE_SEL_GO) { 1065 udelay(1); 1066 } 1067 rval = TSI721_ZONE_SEL_GO | (i << 3) | z; 1068 iowrite32(rval, priv->regs + TSI721_ZONE_SEL); 1069 } 1070 } 1071 1072 if (priv->p2r_bar[0].size == 0 && priv->p2r_bar[1].size == 0) { 1073 priv->obwin_cnt = 0; 1074 return; 1075 } 1076 1077 priv->p2r_bar[0].free = priv->p2r_bar[0].size; 1078 priv->p2r_bar[1].free = priv->p2r_bar[1].size; 1079 1080 for (i = 0; i < TSI721_OBWIN_NUM; i++) 1081 priv->ob_win[i].active = false; 1082 1083 priv->obwin_cnt = TSI721_OBWIN_NUM; 1084 } 1085 1086 /** 1087 * tsi721_rio_map_inb_mem -- Mapping inbound memory region. 1088 * @mport: RapidIO master port 1089 * @lstart: Local memory space start address. 1090 * @rstart: RapidIO space start address. 1091 * @size: The mapping region size. 1092 * @flags: Flags for mapping. 0 for using default flags. 1093 * 1094 * Return: 0 -- Success. 1095 * 1096 * This function will create the inbound mapping 1097 * from rstart to lstart. 1098 */ 1099 static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart, 1100 u64 rstart, u64 size, u32 flags) 1101 { 1102 struct tsi721_device *priv = mport->priv; 1103 int i, avail = -1; 1104 u32 regval; 1105 struct tsi721_ib_win *ib_win; 1106 bool direct = (lstart == rstart); 1107 u64 ibw_size; 1108 dma_addr_t loc_start; 1109 u64 ibw_start; 1110 struct tsi721_ib_win_mapping *map = NULL; 1111 int ret = -EBUSY; 1112 1113 /* Max IBW size supported by HW is 16GB */ 1114 if (size > 0x400000000UL) 1115 return -EINVAL; 1116 1117 if (direct) { 1118 /* Calculate minimal acceptable window size and base address */ 1119 1120 ibw_size = roundup_pow_of_two(size); 1121 ibw_start = lstart & ~(ibw_size - 1); 1122 1123 tsi_debug(IBW, &priv->pdev->dev, 1124 "Direct (RIO_0x%llx -> PCIe_%pad), size=0x%llx, ibw_start = 0x%llx", 1125 rstart, &lstart, size, ibw_start); 1126 1127 while ((lstart + size) > (ibw_start + ibw_size)) { 1128 ibw_size *= 2; 1129 ibw_start = lstart & ~(ibw_size - 1); 1130 /* Check for crossing IBW max size 16GB */ 1131 if (ibw_size > 0x400000000UL) 1132 return -EBUSY; 1133 } 1134 1135 loc_start = ibw_start; 1136 1137 map = kzalloc(sizeof(struct tsi721_ib_win_mapping), GFP_ATOMIC); 1138 if (map == NULL) 1139 return -ENOMEM; 1140 1141 } else { 1142 tsi_debug(IBW, &priv->pdev->dev, 1143 "Translated (RIO_0x%llx -> PCIe_%pad), size=0x%llx", 1144 rstart, &lstart, size); 1145 1146 if (!is_power_of_2(size) || size < 0x1000 || 1147 ((u64)lstart & (size - 1)) || (rstart & (size - 1))) 1148 return -EINVAL; 1149 if (priv->ibwin_cnt == 0) 1150 return -EBUSY; 1151 ibw_start = rstart; 1152 ibw_size = size; 1153 loc_start = lstart; 1154 } 1155 1156 /* 1157 * Scan for overlapping with active regions and mark the first available 1158 * IB window at the same time. 1159 */ 1160 for (i = 0; i < TSI721_IBWIN_NUM; i++) { 1161 ib_win = &priv->ib_win[i]; 1162 1163 if (!ib_win->active) { 1164 if (avail == -1) { 1165 avail = i; 1166 ret = 0; 1167 } 1168 } else if (ibw_start < (ib_win->rstart + ib_win->size) && 1169 (ibw_start + ibw_size) > ib_win->rstart) { 1170 /* Return error if address translation involved */ 1171 if (!direct || ib_win->xlat) { 1172 ret = -EFAULT; 1173 break; 1174 } 1175 1176 /* 1177 * Direct mappings usually are larger than originally 1178 * requested fragments - check if this new request fits 1179 * into it. 1180 */ 1181 if (rstart >= ib_win->rstart && 1182 (rstart + size) <= (ib_win->rstart + 1183 ib_win->size)) { 1184 /* We are in - no further mapping required */ 1185 map->lstart = lstart; 1186 list_add_tail(&map->node, &ib_win->mappings); 1187 return 0; 1188 } 1189 1190 ret = -EFAULT; 1191 break; 1192 } 1193 } 1194 1195 if (ret) 1196 goto out; 1197 i = avail; 1198 1199 /* Sanity check: available IB window must be disabled at this point */ 1200 regval = ioread32(priv->regs + TSI721_IBWIN_LB(i)); 1201 if (WARN_ON(regval & TSI721_IBWIN_LB_WEN)) { 1202 ret = -EIO; 1203 goto out; 1204 } 1205 1206 ib_win = &priv->ib_win[i]; 1207 ib_win->active = true; 1208 ib_win->rstart = ibw_start; 1209 ib_win->lstart = loc_start; 1210 ib_win->size = ibw_size; 1211 ib_win->xlat = (lstart != rstart); 1212 INIT_LIST_HEAD(&ib_win->mappings); 1213 1214 /* 1215 * When using direct IBW mapping and have larger than requested IBW size 1216 * we can have multiple local memory blocks mapped through the same IBW 1217 * To handle this situation we maintain list of "clients" for such IBWs. 1218 */ 1219 if (direct) { 1220 map->lstart = lstart; 1221 list_add_tail(&map->node, &ib_win->mappings); 1222 } 1223 1224 iowrite32(TSI721_IBWIN_SIZE(ibw_size) << 8, 1225 priv->regs + TSI721_IBWIN_SZ(i)); 1226 1227 iowrite32(((u64)loc_start >> 32), priv->regs + TSI721_IBWIN_TUA(i)); 1228 iowrite32(((u64)loc_start & TSI721_IBWIN_TLA_ADD), 1229 priv->regs + TSI721_IBWIN_TLA(i)); 1230 1231 iowrite32(ibw_start >> 32, priv->regs + TSI721_IBWIN_UB(i)); 1232 iowrite32((ibw_start & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN, 1233 priv->regs + TSI721_IBWIN_LB(i)); 1234 1235 priv->ibwin_cnt--; 1236 1237 tsi_debug(IBW, &priv->pdev->dev, 1238 "Configured IBWIN%d (RIO_0x%llx -> PCIe_%pad), size=0x%llx", 1239 i, ibw_start, &loc_start, ibw_size); 1240 1241 return 0; 1242 out: 1243 kfree(map); 1244 return ret; 1245 } 1246 1247 /** 1248 * tsi721_rio_unmap_inb_mem -- Unmapping inbound memory region. 1249 * @mport: RapidIO master port 1250 * @lstart: Local memory space start address. 1251 */ 1252 static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport, 1253 dma_addr_t lstart) 1254 { 1255 struct tsi721_device *priv = mport->priv; 1256 struct tsi721_ib_win *ib_win; 1257 int i; 1258 1259 tsi_debug(IBW, &priv->pdev->dev, 1260 "Unmap IBW mapped to PCIe_%pad", &lstart); 1261 1262 /* Search for matching active inbound translation window */ 1263 for (i = 0; i < TSI721_IBWIN_NUM; i++) { 1264 ib_win = &priv->ib_win[i]; 1265 1266 /* Address translating IBWs must to be an exact march */ 1267 if (!ib_win->active || 1268 (ib_win->xlat && lstart != ib_win->lstart)) 1269 continue; 1270 1271 if (lstart >= ib_win->lstart && 1272 lstart < (ib_win->lstart + ib_win->size)) { 1273 1274 if (!ib_win->xlat) { 1275 struct tsi721_ib_win_mapping *map; 1276 int found = 0; 1277 1278 list_for_each_entry(map, 1279 &ib_win->mappings, node) { 1280 if (map->lstart == lstart) { 1281 list_del(&map->node); 1282 kfree(map); 1283 found = 1; 1284 break; 1285 } 1286 } 1287 1288 if (!found) 1289 continue; 1290 1291 if (!list_empty(&ib_win->mappings)) 1292 break; 1293 } 1294 1295 tsi_debug(IBW, &priv->pdev->dev, "Disable IBWIN_%d", i); 1296 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i)); 1297 ib_win->active = false; 1298 priv->ibwin_cnt++; 1299 break; 1300 } 1301 } 1302 1303 if (i == TSI721_IBWIN_NUM) 1304 tsi_debug(IBW, &priv->pdev->dev, 1305 "IB window mapped to %pad not found", &lstart); 1306 } 1307 1308 /** 1309 * tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe) 1310 * translation regions. 1311 * @priv: pointer to tsi721 private data 1312 * 1313 * Disables inbound windows. 1314 */ 1315 static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv) 1316 { 1317 int i; 1318 1319 /* Disable all SR2PC inbound windows */ 1320 for (i = 0; i < TSI721_IBWIN_NUM; i++) 1321 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i)); 1322 priv->ibwin_cnt = TSI721_IBWIN_NUM; 1323 } 1324 1325 /* 1326 * tsi721_close_sr2pc_mapping - closes all active inbound (SRIO->PCIe) 1327 * translation regions. 1328 * @priv: pointer to tsi721 device private data 1329 */ 1330 static void tsi721_close_sr2pc_mapping(struct tsi721_device *priv) 1331 { 1332 struct tsi721_ib_win *ib_win; 1333 int i; 1334 1335 /* Disable all active SR2PC inbound windows */ 1336 for (i = 0; i < TSI721_IBWIN_NUM; i++) { 1337 ib_win = &priv->ib_win[i]; 1338 if (ib_win->active) { 1339 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i)); 1340 ib_win->active = false; 1341 } 1342 } 1343 } 1344 1345 /** 1346 * tsi721_port_write_init - Inbound port write interface init 1347 * @priv: pointer to tsi721 private data 1348 * 1349 * Initializes inbound port write handler. 1350 * Returns %0 on success or %-ENOMEM on failure. 1351 */ 1352 static int tsi721_port_write_init(struct tsi721_device *priv) 1353 { 1354 priv->pw_discard_count = 0; 1355 INIT_WORK(&priv->pw_work, tsi721_pw_dpc); 1356 spin_lock_init(&priv->pw_fifo_lock); 1357 if (kfifo_alloc(&priv->pw_fifo, 1358 TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) { 1359 tsi_err(&priv->pdev->dev, "PW FIFO allocation failed"); 1360 return -ENOMEM; 1361 } 1362 1363 /* Use reliable port-write capture mode */ 1364 iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL); 1365 return 0; 1366 } 1367 1368 static void tsi721_port_write_free(struct tsi721_device *priv) 1369 { 1370 kfifo_free(&priv->pw_fifo); 1371 } 1372 1373 static int tsi721_doorbell_init(struct tsi721_device *priv) 1374 { 1375 /* Outbound Doorbells do not require any setup. 1376 * Tsi721 uses dedicated PCI BAR1 to generate doorbells. 1377 * That BAR1 was mapped during the probe routine. 1378 */ 1379 1380 /* Initialize Inbound Doorbell processing DPC and queue */ 1381 priv->db_discard_count = 0; 1382 INIT_WORK(&priv->idb_work, tsi721_db_dpc); 1383 1384 /* Allocate buffer for inbound doorbells queue */ 1385 priv->idb_base = dma_zalloc_coherent(&priv->pdev->dev, 1386 IDB_QSIZE * TSI721_IDB_ENTRY_SIZE, 1387 &priv->idb_dma, GFP_KERNEL); 1388 if (!priv->idb_base) 1389 return -ENOMEM; 1390 1391 tsi_debug(DBELL, &priv->pdev->dev, 1392 "Allocated IDB buffer @ %p (phys = %pad)", 1393 priv->idb_base, &priv->idb_dma); 1394 1395 iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE), 1396 priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE)); 1397 iowrite32(((u64)priv->idb_dma >> 32), 1398 priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE)); 1399 iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR), 1400 priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE)); 1401 /* Enable accepting all inbound doorbells */ 1402 iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE)); 1403 1404 iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE)); 1405 1406 iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE)); 1407 1408 return 0; 1409 } 1410 1411 static void tsi721_doorbell_free(struct tsi721_device *priv) 1412 { 1413 if (priv->idb_base == NULL) 1414 return; 1415 1416 /* Free buffer allocated for inbound doorbell queue */ 1417 dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE, 1418 priv->idb_base, priv->idb_dma); 1419 priv->idb_base = NULL; 1420 } 1421 1422 /** 1423 * tsi721_bdma_maint_init - Initialize maintenance request BDMA channel. 1424 * @priv: pointer to tsi721 private data 1425 * 1426 * Initialize BDMA channel allocated for RapidIO maintenance read/write 1427 * request generation 1428 * Returns %0 on success or %-ENOMEM on failure. 1429 */ 1430 static int tsi721_bdma_maint_init(struct tsi721_device *priv) 1431 { 1432 struct tsi721_dma_desc *bd_ptr; 1433 u64 *sts_ptr; 1434 dma_addr_t bd_phys, sts_phys; 1435 int sts_size; 1436 int bd_num = 2; 1437 void __iomem *regs; 1438 1439 tsi_debug(MAINT, &priv->pdev->dev, 1440 "Init BDMA_%d Maintenance requests", TSI721_DMACH_MAINT); 1441 1442 /* 1443 * Initialize DMA channel for maintenance requests 1444 */ 1445 1446 priv->mdma.ch_id = TSI721_DMACH_MAINT; 1447 regs = priv->regs + TSI721_DMAC_BASE(TSI721_DMACH_MAINT); 1448 1449 /* Allocate space for DMA descriptors */ 1450 bd_ptr = dma_zalloc_coherent(&priv->pdev->dev, 1451 bd_num * sizeof(struct tsi721_dma_desc), 1452 &bd_phys, GFP_KERNEL); 1453 if (!bd_ptr) 1454 return -ENOMEM; 1455 1456 priv->mdma.bd_num = bd_num; 1457 priv->mdma.bd_phys = bd_phys; 1458 priv->mdma.bd_base = bd_ptr; 1459 1460 tsi_debug(MAINT, &priv->pdev->dev, "DMA descriptors @ %p (phys = %pad)", 1461 bd_ptr, &bd_phys); 1462 1463 /* Allocate space for descriptor status FIFO */ 1464 sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ? 1465 bd_num : TSI721_DMA_MINSTSSZ; 1466 sts_size = roundup_pow_of_two(sts_size); 1467 sts_ptr = dma_zalloc_coherent(&priv->pdev->dev, 1468 sts_size * sizeof(struct tsi721_dma_sts), 1469 &sts_phys, GFP_KERNEL); 1470 if (!sts_ptr) { 1471 /* Free space allocated for DMA descriptors */ 1472 dma_free_coherent(&priv->pdev->dev, 1473 bd_num * sizeof(struct tsi721_dma_desc), 1474 bd_ptr, bd_phys); 1475 priv->mdma.bd_base = NULL; 1476 return -ENOMEM; 1477 } 1478 1479 priv->mdma.sts_phys = sts_phys; 1480 priv->mdma.sts_base = sts_ptr; 1481 priv->mdma.sts_size = sts_size; 1482 1483 tsi_debug(MAINT, &priv->pdev->dev, 1484 "desc status FIFO @ %p (phys = %pad) size=0x%x", 1485 sts_ptr, &sts_phys, sts_size); 1486 1487 /* Initialize DMA descriptors ring */ 1488 bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29); 1489 bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys & 1490 TSI721_DMAC_DPTRL_MASK); 1491 bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32); 1492 1493 /* Setup DMA descriptor pointers */ 1494 iowrite32(((u64)bd_phys >> 32), regs + TSI721_DMAC_DPTRH); 1495 iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK), 1496 regs + TSI721_DMAC_DPTRL); 1497 1498 /* Setup descriptor status FIFO */ 1499 iowrite32(((u64)sts_phys >> 32), regs + TSI721_DMAC_DSBH); 1500 iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK), 1501 regs + TSI721_DMAC_DSBL); 1502 iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size), 1503 regs + TSI721_DMAC_DSSZ); 1504 1505 /* Clear interrupt bits */ 1506 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT); 1507 1508 ioread32(regs + TSI721_DMAC_INT); 1509 1510 /* Toggle DMA channel initialization */ 1511 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL); 1512 ioread32(regs + TSI721_DMAC_CTL); 1513 udelay(10); 1514 1515 return 0; 1516 } 1517 1518 static int tsi721_bdma_maint_free(struct tsi721_device *priv) 1519 { 1520 u32 ch_stat; 1521 struct tsi721_bdma_maint *mdma = &priv->mdma; 1522 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(mdma->ch_id); 1523 1524 if (mdma->bd_base == NULL) 1525 return 0; 1526 1527 /* Check if DMA channel still running */ 1528 ch_stat = ioread32(regs + TSI721_DMAC_STS); 1529 if (ch_stat & TSI721_DMAC_STS_RUN) 1530 return -EFAULT; 1531 1532 /* Put DMA channel into init state */ 1533 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL); 1534 1535 /* Free space allocated for DMA descriptors */ 1536 dma_free_coherent(&priv->pdev->dev, 1537 mdma->bd_num * sizeof(struct tsi721_dma_desc), 1538 mdma->bd_base, mdma->bd_phys); 1539 mdma->bd_base = NULL; 1540 1541 /* Free space allocated for status FIFO */ 1542 dma_free_coherent(&priv->pdev->dev, 1543 mdma->sts_size * sizeof(struct tsi721_dma_sts), 1544 mdma->sts_base, mdma->sts_phys); 1545 mdma->sts_base = NULL; 1546 return 0; 1547 } 1548 1549 /* Enable Inbound Messaging Interrupts */ 1550 static void 1551 tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch, 1552 u32 inte_mask) 1553 { 1554 u32 rval; 1555 1556 if (!inte_mask) 1557 return; 1558 1559 /* Clear pending Inbound Messaging interrupts */ 1560 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch)); 1561 1562 /* Enable Inbound Messaging interrupts */ 1563 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch)); 1564 iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch)); 1565 1566 if (priv->flags & TSI721_USING_MSIX) 1567 return; /* Finished if we are in MSI-X mode */ 1568 1569 /* 1570 * For MSI and INTA interrupt signalling we need to enable next levels 1571 */ 1572 1573 /* Enable Device Channel Interrupt */ 1574 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 1575 iowrite32(rval | TSI721_INT_IMSG_CHAN(ch), 1576 priv->regs + TSI721_DEV_CHAN_INTE); 1577 } 1578 1579 /* Disable Inbound Messaging Interrupts */ 1580 static void 1581 tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch, 1582 u32 inte_mask) 1583 { 1584 u32 rval; 1585 1586 if (!inte_mask) 1587 return; 1588 1589 /* Clear pending Inbound Messaging interrupts */ 1590 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch)); 1591 1592 /* Disable Inbound Messaging interrupts */ 1593 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch)); 1594 rval &= ~inte_mask; 1595 iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch)); 1596 1597 if (priv->flags & TSI721_USING_MSIX) 1598 return; /* Finished if we are in MSI-X mode */ 1599 1600 /* 1601 * For MSI and INTA interrupt signalling we need to disable next levels 1602 */ 1603 1604 /* Disable Device Channel Interrupt */ 1605 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 1606 rval &= ~TSI721_INT_IMSG_CHAN(ch); 1607 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE); 1608 } 1609 1610 /* Enable Outbound Messaging interrupts */ 1611 static void 1612 tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch, 1613 u32 inte_mask) 1614 { 1615 u32 rval; 1616 1617 if (!inte_mask) 1618 return; 1619 1620 /* Clear pending Outbound Messaging interrupts */ 1621 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch)); 1622 1623 /* Enable Outbound Messaging channel interrupts */ 1624 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch)); 1625 iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch)); 1626 1627 if (priv->flags & TSI721_USING_MSIX) 1628 return; /* Finished if we are in MSI-X mode */ 1629 1630 /* 1631 * For MSI and INTA interrupt signalling we need to enable next levels 1632 */ 1633 1634 /* Enable Device Channel Interrupt */ 1635 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 1636 iowrite32(rval | TSI721_INT_OMSG_CHAN(ch), 1637 priv->regs + TSI721_DEV_CHAN_INTE); 1638 } 1639 1640 /* Disable Outbound Messaging interrupts */ 1641 static void 1642 tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch, 1643 u32 inte_mask) 1644 { 1645 u32 rval; 1646 1647 if (!inte_mask) 1648 return; 1649 1650 /* Clear pending Outbound Messaging interrupts */ 1651 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch)); 1652 1653 /* Disable Outbound Messaging interrupts */ 1654 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch)); 1655 rval &= ~inte_mask; 1656 iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch)); 1657 1658 if (priv->flags & TSI721_USING_MSIX) 1659 return; /* Finished if we are in MSI-X mode */ 1660 1661 /* 1662 * For MSI and INTA interrupt signalling we need to disable next levels 1663 */ 1664 1665 /* Disable Device Channel Interrupt */ 1666 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 1667 rval &= ~TSI721_INT_OMSG_CHAN(ch); 1668 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE); 1669 } 1670 1671 /** 1672 * tsi721_add_outb_message - Add message to the Tsi721 outbound message queue 1673 * @mport: Master port with outbound message queue 1674 * @rdev: Target of outbound message 1675 * @mbox: Outbound mailbox 1676 * @buffer: Message to add to outbound queue 1677 * @len: Length of message 1678 */ 1679 static int 1680 tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox, 1681 void *buffer, size_t len) 1682 { 1683 struct tsi721_device *priv = mport->priv; 1684 struct tsi721_omsg_desc *desc; 1685 u32 tx_slot; 1686 unsigned long flags; 1687 1688 if (!priv->omsg_init[mbox] || 1689 len > TSI721_MSG_MAX_SIZE || len < 8) 1690 return -EINVAL; 1691 1692 spin_lock_irqsave(&priv->omsg_ring[mbox].lock, flags); 1693 1694 tx_slot = priv->omsg_ring[mbox].tx_slot; 1695 1696 /* Copy copy message into transfer buffer */ 1697 memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len); 1698 1699 if (len & 0x7) 1700 len += 8; 1701 1702 /* Build descriptor associated with buffer */ 1703 desc = priv->omsg_ring[mbox].omd_base; 1704 desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid); 1705 #ifdef TSI721_OMSG_DESC_INT 1706 /* Request IOF_DONE interrupt generation for each N-th frame in queue */ 1707 if (tx_slot % 4 == 0) 1708 desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF); 1709 #endif 1710 desc[tx_slot].msg_info = 1711 cpu_to_le32((mport->sys_size << 26) | (mbox << 22) | 1712 (0xe << 12) | (len & 0xff8)); 1713 desc[tx_slot].bufptr_lo = 1714 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] & 1715 0xffffffff); 1716 desc[tx_slot].bufptr_hi = 1717 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32); 1718 1719 priv->omsg_ring[mbox].wr_count++; 1720 1721 /* Go to next descriptor */ 1722 if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) { 1723 priv->omsg_ring[mbox].tx_slot = 0; 1724 /* Move through the ring link descriptor at the end */ 1725 priv->omsg_ring[mbox].wr_count++; 1726 } 1727 1728 mb(); 1729 1730 /* Set new write count value */ 1731 iowrite32(priv->omsg_ring[mbox].wr_count, 1732 priv->regs + TSI721_OBDMAC_DWRCNT(mbox)); 1733 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox)); 1734 1735 spin_unlock_irqrestore(&priv->omsg_ring[mbox].lock, flags); 1736 1737 return 0; 1738 } 1739 1740 /** 1741 * tsi721_omsg_handler - Outbound Message Interrupt Handler 1742 * @priv: pointer to tsi721 private data 1743 * @ch: number of OB MSG channel to service 1744 * 1745 * Services channel interrupts from outbound messaging engine. 1746 */ 1747 static void tsi721_omsg_handler(struct tsi721_device *priv, int ch) 1748 { 1749 u32 omsg_int; 1750 struct rio_mport *mport = &priv->mport; 1751 void *dev_id = NULL; 1752 u32 tx_slot = 0xffffffff; 1753 int do_callback = 0; 1754 1755 spin_lock(&priv->omsg_ring[ch].lock); 1756 1757 omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch)); 1758 1759 if (omsg_int & TSI721_OBDMAC_INT_ST_FULL) 1760 tsi_info(&priv->pdev->dev, 1761 "OB MBOX%d: Status FIFO is full", ch); 1762 1763 if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) { 1764 u32 srd_ptr; 1765 u64 *sts_ptr, last_ptr = 0, prev_ptr = 0; 1766 int i, j; 1767 1768 /* 1769 * Find last successfully processed descriptor 1770 */ 1771 1772 /* Check and clear descriptor status FIFO entries */ 1773 srd_ptr = priv->omsg_ring[ch].sts_rdptr; 1774 sts_ptr = priv->omsg_ring[ch].sts_base; 1775 j = srd_ptr * 8; 1776 while (sts_ptr[j]) { 1777 for (i = 0; i < 8 && sts_ptr[j]; i++, j++) { 1778 prev_ptr = last_ptr; 1779 last_ptr = le64_to_cpu(sts_ptr[j]); 1780 sts_ptr[j] = 0; 1781 } 1782 1783 ++srd_ptr; 1784 srd_ptr %= priv->omsg_ring[ch].sts_size; 1785 j = srd_ptr * 8; 1786 } 1787 1788 if (last_ptr == 0) 1789 goto no_sts_update; 1790 1791 priv->omsg_ring[ch].sts_rdptr = srd_ptr; 1792 iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch)); 1793 1794 if (!mport->outb_msg[ch].mcback) 1795 goto no_sts_update; 1796 1797 /* Inform upper layer about transfer completion */ 1798 1799 tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/ 1800 sizeof(struct tsi721_omsg_desc); 1801 1802 /* 1803 * Check if this is a Link Descriptor (LD). 1804 * If yes, ignore LD and use descriptor processed 1805 * before LD. 1806 */ 1807 if (tx_slot == priv->omsg_ring[ch].size) { 1808 if (prev_ptr) 1809 tx_slot = (prev_ptr - 1810 (u64)priv->omsg_ring[ch].omd_phys)/ 1811 sizeof(struct tsi721_omsg_desc); 1812 else 1813 goto no_sts_update; 1814 } 1815 1816 if (tx_slot >= priv->omsg_ring[ch].size) 1817 tsi_debug(OMSG, &priv->pdev->dev, 1818 "OB_MSG tx_slot=%x > size=%x", 1819 tx_slot, priv->omsg_ring[ch].size); 1820 WARN_ON(tx_slot >= priv->omsg_ring[ch].size); 1821 1822 /* Move slot index to the next message to be sent */ 1823 ++tx_slot; 1824 if (tx_slot == priv->omsg_ring[ch].size) 1825 tx_slot = 0; 1826 1827 dev_id = priv->omsg_ring[ch].dev_id; 1828 do_callback = 1; 1829 } 1830 1831 no_sts_update: 1832 1833 if (omsg_int & TSI721_OBDMAC_INT_ERROR) { 1834 /* 1835 * Outbound message operation aborted due to error, 1836 * reinitialize OB MSG channel 1837 */ 1838 1839 tsi_debug(OMSG, &priv->pdev->dev, "OB MSG ABORT ch_stat=%x", 1840 ioread32(priv->regs + TSI721_OBDMAC_STS(ch))); 1841 1842 iowrite32(TSI721_OBDMAC_INT_ERROR, 1843 priv->regs + TSI721_OBDMAC_INT(ch)); 1844 iowrite32(TSI721_OBDMAC_CTL_RETRY_THR | TSI721_OBDMAC_CTL_INIT, 1845 priv->regs + TSI721_OBDMAC_CTL(ch)); 1846 ioread32(priv->regs + TSI721_OBDMAC_CTL(ch)); 1847 1848 /* Inform upper level to clear all pending tx slots */ 1849 dev_id = priv->omsg_ring[ch].dev_id; 1850 tx_slot = priv->omsg_ring[ch].tx_slot; 1851 do_callback = 1; 1852 1853 /* Synch tx_slot tracking */ 1854 iowrite32(priv->omsg_ring[ch].tx_slot, 1855 priv->regs + TSI721_OBDMAC_DRDCNT(ch)); 1856 ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch)); 1857 priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot; 1858 priv->omsg_ring[ch].sts_rdptr = 0; 1859 } 1860 1861 /* Clear channel interrupts */ 1862 iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch)); 1863 1864 if (!(priv->flags & TSI721_USING_MSIX)) { 1865 u32 ch_inte; 1866 1867 /* Re-enable channel interrupts */ 1868 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 1869 ch_inte |= TSI721_INT_OMSG_CHAN(ch); 1870 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); 1871 } 1872 1873 spin_unlock(&priv->omsg_ring[ch].lock); 1874 1875 if (mport->outb_msg[ch].mcback && do_callback) 1876 mport->outb_msg[ch].mcback(mport, dev_id, ch, tx_slot); 1877 } 1878 1879 /** 1880 * tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox 1881 * @mport: Master port implementing Outbound Messaging Engine 1882 * @dev_id: Device specific pointer to pass on event 1883 * @mbox: Mailbox to open 1884 * @entries: Number of entries in the outbound mailbox ring 1885 */ 1886 static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id, 1887 int mbox, int entries) 1888 { 1889 struct tsi721_device *priv = mport->priv; 1890 struct tsi721_omsg_desc *bd_ptr; 1891 int i, rc = 0; 1892 1893 if ((entries < TSI721_OMSGD_MIN_RING_SIZE) || 1894 (entries > (TSI721_OMSGD_RING_SIZE)) || 1895 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) { 1896 rc = -EINVAL; 1897 goto out; 1898 } 1899 1900 if ((mbox_sel & (1 << mbox)) == 0) { 1901 rc = -ENODEV; 1902 goto out; 1903 } 1904 1905 priv->omsg_ring[mbox].dev_id = dev_id; 1906 priv->omsg_ring[mbox].size = entries; 1907 priv->omsg_ring[mbox].sts_rdptr = 0; 1908 spin_lock_init(&priv->omsg_ring[mbox].lock); 1909 1910 /* Outbound Msg Buffer allocation based on 1911 the number of maximum descriptor entries */ 1912 for (i = 0; i < entries; i++) { 1913 priv->omsg_ring[mbox].omq_base[i] = 1914 dma_alloc_coherent( 1915 &priv->pdev->dev, TSI721_MSG_BUFFER_SIZE, 1916 &priv->omsg_ring[mbox].omq_phys[i], 1917 GFP_KERNEL); 1918 if (priv->omsg_ring[mbox].omq_base[i] == NULL) { 1919 tsi_debug(OMSG, &priv->pdev->dev, 1920 "ENOMEM for OB_MSG_%d data buffer", mbox); 1921 rc = -ENOMEM; 1922 goto out_buf; 1923 } 1924 } 1925 1926 /* Outbound message descriptor allocation */ 1927 priv->omsg_ring[mbox].omd_base = dma_alloc_coherent( 1928 &priv->pdev->dev, 1929 (entries + 1) * sizeof(struct tsi721_omsg_desc), 1930 &priv->omsg_ring[mbox].omd_phys, GFP_KERNEL); 1931 if (priv->omsg_ring[mbox].omd_base == NULL) { 1932 tsi_debug(OMSG, &priv->pdev->dev, 1933 "ENOMEM for OB_MSG_%d descriptor memory", mbox); 1934 rc = -ENOMEM; 1935 goto out_buf; 1936 } 1937 1938 priv->omsg_ring[mbox].tx_slot = 0; 1939 1940 /* Outbound message descriptor status FIFO allocation */ 1941 priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1); 1942 priv->omsg_ring[mbox].sts_base = dma_zalloc_coherent(&priv->pdev->dev, 1943 priv->omsg_ring[mbox].sts_size * 1944 sizeof(struct tsi721_dma_sts), 1945 &priv->omsg_ring[mbox].sts_phys, GFP_KERNEL); 1946 if (priv->omsg_ring[mbox].sts_base == NULL) { 1947 tsi_debug(OMSG, &priv->pdev->dev, 1948 "ENOMEM for OB_MSG_%d status FIFO", mbox); 1949 rc = -ENOMEM; 1950 goto out_desc; 1951 } 1952 1953 /* 1954 * Configure Outbound Messaging Engine 1955 */ 1956 1957 /* Setup Outbound Message descriptor pointer */ 1958 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32), 1959 priv->regs + TSI721_OBDMAC_DPTRH(mbox)); 1960 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys & 1961 TSI721_OBDMAC_DPTRL_MASK), 1962 priv->regs + TSI721_OBDMAC_DPTRL(mbox)); 1963 1964 /* Setup Outbound Message descriptor status FIFO */ 1965 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32), 1966 priv->regs + TSI721_OBDMAC_DSBH(mbox)); 1967 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys & 1968 TSI721_OBDMAC_DSBL_MASK), 1969 priv->regs + TSI721_OBDMAC_DSBL(mbox)); 1970 iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size), 1971 priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox)); 1972 1973 /* Enable interrupts */ 1974 1975 #ifdef CONFIG_PCI_MSI 1976 if (priv->flags & TSI721_USING_MSIX) { 1977 int idx = TSI721_VECT_OMB0_DONE + mbox; 1978 1979 /* Request interrupt service if we are in MSI-X mode */ 1980 rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0, 1981 priv->msix[idx].irq_name, (void *)priv); 1982 1983 if (rc) { 1984 tsi_debug(OMSG, &priv->pdev->dev, 1985 "Unable to get MSI-X IRQ for OBOX%d-DONE", 1986 mbox); 1987 goto out_stat; 1988 } 1989 1990 idx = TSI721_VECT_OMB0_INT + mbox; 1991 rc = request_irq(priv->msix[idx].vector, tsi721_omsg_msix, 0, 1992 priv->msix[idx].irq_name, (void *)priv); 1993 1994 if (rc) { 1995 tsi_debug(OMSG, &priv->pdev->dev, 1996 "Unable to get MSI-X IRQ for MBOX%d-INT", mbox); 1997 idx = TSI721_VECT_OMB0_DONE + mbox; 1998 free_irq(priv->msix[idx].vector, (void *)priv); 1999 goto out_stat; 2000 } 2001 } 2002 #endif /* CONFIG_PCI_MSI */ 2003 2004 tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL); 2005 2006 /* Initialize Outbound Message descriptors ring */ 2007 bd_ptr = priv->omsg_ring[mbox].omd_base; 2008 bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29); 2009 bd_ptr[entries].msg_info = 0; 2010 bd_ptr[entries].next_lo = 2011 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys & 2012 TSI721_OBDMAC_DPTRL_MASK); 2013 bd_ptr[entries].next_hi = 2014 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32); 2015 priv->omsg_ring[mbox].wr_count = 0; 2016 mb(); 2017 2018 /* Initialize Outbound Message engine */ 2019 iowrite32(TSI721_OBDMAC_CTL_RETRY_THR | TSI721_OBDMAC_CTL_INIT, 2020 priv->regs + TSI721_OBDMAC_CTL(mbox)); 2021 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox)); 2022 udelay(10); 2023 2024 priv->omsg_init[mbox] = 1; 2025 2026 return 0; 2027 2028 #ifdef CONFIG_PCI_MSI 2029 out_stat: 2030 dma_free_coherent(&priv->pdev->dev, 2031 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts), 2032 priv->omsg_ring[mbox].sts_base, 2033 priv->omsg_ring[mbox].sts_phys); 2034 2035 priv->omsg_ring[mbox].sts_base = NULL; 2036 #endif /* CONFIG_PCI_MSI */ 2037 2038 out_desc: 2039 dma_free_coherent(&priv->pdev->dev, 2040 (entries + 1) * sizeof(struct tsi721_omsg_desc), 2041 priv->omsg_ring[mbox].omd_base, 2042 priv->omsg_ring[mbox].omd_phys); 2043 2044 priv->omsg_ring[mbox].omd_base = NULL; 2045 2046 out_buf: 2047 for (i = 0; i < priv->omsg_ring[mbox].size; i++) { 2048 if (priv->omsg_ring[mbox].omq_base[i]) { 2049 dma_free_coherent(&priv->pdev->dev, 2050 TSI721_MSG_BUFFER_SIZE, 2051 priv->omsg_ring[mbox].omq_base[i], 2052 priv->omsg_ring[mbox].omq_phys[i]); 2053 2054 priv->omsg_ring[mbox].omq_base[i] = NULL; 2055 } 2056 } 2057 2058 out: 2059 return rc; 2060 } 2061 2062 /** 2063 * tsi721_close_outb_mbox - Close Tsi721 outbound mailbox 2064 * @mport: Master port implementing the outbound message unit 2065 * @mbox: Mailbox to close 2066 */ 2067 static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox) 2068 { 2069 struct tsi721_device *priv = mport->priv; 2070 u32 i; 2071 2072 if (!priv->omsg_init[mbox]) 2073 return; 2074 priv->omsg_init[mbox] = 0; 2075 2076 /* Disable Interrupts */ 2077 2078 tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL); 2079 2080 #ifdef CONFIG_PCI_MSI 2081 if (priv->flags & TSI721_USING_MSIX) { 2082 free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector, 2083 (void *)priv); 2084 free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector, 2085 (void *)priv); 2086 } 2087 #endif /* CONFIG_PCI_MSI */ 2088 2089 /* Free OMSG Descriptor Status FIFO */ 2090 dma_free_coherent(&priv->pdev->dev, 2091 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts), 2092 priv->omsg_ring[mbox].sts_base, 2093 priv->omsg_ring[mbox].sts_phys); 2094 2095 priv->omsg_ring[mbox].sts_base = NULL; 2096 2097 /* Free OMSG descriptors */ 2098 dma_free_coherent(&priv->pdev->dev, 2099 (priv->omsg_ring[mbox].size + 1) * 2100 sizeof(struct tsi721_omsg_desc), 2101 priv->omsg_ring[mbox].omd_base, 2102 priv->omsg_ring[mbox].omd_phys); 2103 2104 priv->omsg_ring[mbox].omd_base = NULL; 2105 2106 /* Free message buffers */ 2107 for (i = 0; i < priv->omsg_ring[mbox].size; i++) { 2108 if (priv->omsg_ring[mbox].omq_base[i]) { 2109 dma_free_coherent(&priv->pdev->dev, 2110 TSI721_MSG_BUFFER_SIZE, 2111 priv->omsg_ring[mbox].omq_base[i], 2112 priv->omsg_ring[mbox].omq_phys[i]); 2113 2114 priv->omsg_ring[mbox].omq_base[i] = NULL; 2115 } 2116 } 2117 } 2118 2119 /** 2120 * tsi721_imsg_handler - Inbound Message Interrupt Handler 2121 * @priv: pointer to tsi721 private data 2122 * @ch: inbound message channel number to service 2123 * 2124 * Services channel interrupts from inbound messaging engine. 2125 */ 2126 static void tsi721_imsg_handler(struct tsi721_device *priv, int ch) 2127 { 2128 u32 mbox = ch - 4; 2129 u32 imsg_int; 2130 struct rio_mport *mport = &priv->mport; 2131 2132 spin_lock(&priv->imsg_ring[mbox].lock); 2133 2134 imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch)); 2135 2136 if (imsg_int & TSI721_IBDMAC_INT_SRTO) 2137 tsi_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout", mbox); 2138 2139 if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR) 2140 tsi_info(&priv->pdev->dev, "IB MBOX%d PCIe error", mbox); 2141 2142 if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW) 2143 tsi_info(&priv->pdev->dev, "IB MBOX%d IB free queue low", mbox); 2144 2145 /* Clear IB channel interrupts */ 2146 iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch)); 2147 2148 /* If an IB Msg is received notify the upper layer */ 2149 if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV && 2150 mport->inb_msg[mbox].mcback) 2151 mport->inb_msg[mbox].mcback(mport, 2152 priv->imsg_ring[mbox].dev_id, mbox, -1); 2153 2154 if (!(priv->flags & TSI721_USING_MSIX)) { 2155 u32 ch_inte; 2156 2157 /* Re-enable channel interrupts */ 2158 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); 2159 ch_inte |= TSI721_INT_IMSG_CHAN(ch); 2160 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); 2161 } 2162 2163 spin_unlock(&priv->imsg_ring[mbox].lock); 2164 } 2165 2166 /** 2167 * tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox 2168 * @mport: Master port implementing the Inbound Messaging Engine 2169 * @dev_id: Device specific pointer to pass on event 2170 * @mbox: Mailbox to open 2171 * @entries: Number of entries in the inbound mailbox ring 2172 */ 2173 static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id, 2174 int mbox, int entries) 2175 { 2176 struct tsi721_device *priv = mport->priv; 2177 int ch = mbox + 4; 2178 int i; 2179 u64 *free_ptr; 2180 int rc = 0; 2181 2182 if ((entries < TSI721_IMSGD_MIN_RING_SIZE) || 2183 (entries > TSI721_IMSGD_RING_SIZE) || 2184 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) { 2185 rc = -EINVAL; 2186 goto out; 2187 } 2188 2189 if ((mbox_sel & (1 << mbox)) == 0) { 2190 rc = -ENODEV; 2191 goto out; 2192 } 2193 2194 /* Initialize IB Messaging Ring */ 2195 priv->imsg_ring[mbox].dev_id = dev_id; 2196 priv->imsg_ring[mbox].size = entries; 2197 priv->imsg_ring[mbox].rx_slot = 0; 2198 priv->imsg_ring[mbox].desc_rdptr = 0; 2199 priv->imsg_ring[mbox].fq_wrptr = 0; 2200 for (i = 0; i < priv->imsg_ring[mbox].size; i++) 2201 priv->imsg_ring[mbox].imq_base[i] = NULL; 2202 spin_lock_init(&priv->imsg_ring[mbox].lock); 2203 2204 /* Allocate buffers for incoming messages */ 2205 priv->imsg_ring[mbox].buf_base = 2206 dma_alloc_coherent(&priv->pdev->dev, 2207 entries * TSI721_MSG_BUFFER_SIZE, 2208 &priv->imsg_ring[mbox].buf_phys, 2209 GFP_KERNEL); 2210 2211 if (priv->imsg_ring[mbox].buf_base == NULL) { 2212 tsi_err(&priv->pdev->dev, 2213 "Failed to allocate buffers for IB MBOX%d", mbox); 2214 rc = -ENOMEM; 2215 goto out; 2216 } 2217 2218 /* Allocate memory for circular free list */ 2219 priv->imsg_ring[mbox].imfq_base = 2220 dma_alloc_coherent(&priv->pdev->dev, 2221 entries * 8, 2222 &priv->imsg_ring[mbox].imfq_phys, 2223 GFP_KERNEL); 2224 2225 if (priv->imsg_ring[mbox].imfq_base == NULL) { 2226 tsi_err(&priv->pdev->dev, 2227 "Failed to allocate free queue for IB MBOX%d", mbox); 2228 rc = -ENOMEM; 2229 goto out_buf; 2230 } 2231 2232 /* Allocate memory for Inbound message descriptors */ 2233 priv->imsg_ring[mbox].imd_base = 2234 dma_alloc_coherent(&priv->pdev->dev, 2235 entries * sizeof(struct tsi721_imsg_desc), 2236 &priv->imsg_ring[mbox].imd_phys, GFP_KERNEL); 2237 2238 if (priv->imsg_ring[mbox].imd_base == NULL) { 2239 tsi_err(&priv->pdev->dev, 2240 "Failed to allocate descriptor memory for IB MBOX%d", 2241 mbox); 2242 rc = -ENOMEM; 2243 goto out_dma; 2244 } 2245 2246 /* Fill free buffer pointer list */ 2247 free_ptr = priv->imsg_ring[mbox].imfq_base; 2248 for (i = 0; i < entries; i++) 2249 free_ptr[i] = cpu_to_le64( 2250 (u64)(priv->imsg_ring[mbox].buf_phys) + 2251 i * 0x1000); 2252 2253 mb(); 2254 2255 /* 2256 * For mapping of inbound SRIO Messages into appropriate queues we need 2257 * to set Inbound Device ID register in the messaging engine. We do it 2258 * once when first inbound mailbox is requested. 2259 */ 2260 if (!(priv->flags & TSI721_IMSGID_SET)) { 2261 iowrite32((u32)priv->mport.host_deviceid, 2262 priv->regs + TSI721_IB_DEVID); 2263 priv->flags |= TSI721_IMSGID_SET; 2264 } 2265 2266 /* 2267 * Configure Inbound Messaging channel (ch = mbox + 4) 2268 */ 2269 2270 /* Setup Inbound Message free queue */ 2271 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32), 2272 priv->regs + TSI721_IBDMAC_FQBH(ch)); 2273 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys & 2274 TSI721_IBDMAC_FQBL_MASK), 2275 priv->regs+TSI721_IBDMAC_FQBL(ch)); 2276 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries), 2277 priv->regs + TSI721_IBDMAC_FQSZ(ch)); 2278 2279 /* Setup Inbound Message descriptor queue */ 2280 iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32), 2281 priv->regs + TSI721_IBDMAC_DQBH(ch)); 2282 iowrite32(((u32)priv->imsg_ring[mbox].imd_phys & 2283 (u32)TSI721_IBDMAC_DQBL_MASK), 2284 priv->regs+TSI721_IBDMAC_DQBL(ch)); 2285 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries), 2286 priv->regs + TSI721_IBDMAC_DQSZ(ch)); 2287 2288 /* Enable interrupts */ 2289 2290 #ifdef CONFIG_PCI_MSI 2291 if (priv->flags & TSI721_USING_MSIX) { 2292 int idx = TSI721_VECT_IMB0_RCV + mbox; 2293 2294 /* Request interrupt service if we are in MSI-X mode */ 2295 rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0, 2296 priv->msix[idx].irq_name, (void *)priv); 2297 2298 if (rc) { 2299 tsi_debug(IMSG, &priv->pdev->dev, 2300 "Unable to get MSI-X IRQ for IBOX%d-DONE", 2301 mbox); 2302 goto out_desc; 2303 } 2304 2305 idx = TSI721_VECT_IMB0_INT + mbox; 2306 rc = request_irq(priv->msix[idx].vector, tsi721_imsg_msix, 0, 2307 priv->msix[idx].irq_name, (void *)priv); 2308 2309 if (rc) { 2310 tsi_debug(IMSG, &priv->pdev->dev, 2311 "Unable to get MSI-X IRQ for IBOX%d-INT", mbox); 2312 free_irq( 2313 priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector, 2314 (void *)priv); 2315 goto out_desc; 2316 } 2317 } 2318 #endif /* CONFIG_PCI_MSI */ 2319 2320 tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL); 2321 2322 /* Initialize Inbound Message Engine */ 2323 iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch)); 2324 ioread32(priv->regs + TSI721_IBDMAC_CTL(ch)); 2325 udelay(10); 2326 priv->imsg_ring[mbox].fq_wrptr = entries - 1; 2327 iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch)); 2328 2329 priv->imsg_init[mbox] = 1; 2330 return 0; 2331 2332 #ifdef CONFIG_PCI_MSI 2333 out_desc: 2334 dma_free_coherent(&priv->pdev->dev, 2335 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc), 2336 priv->imsg_ring[mbox].imd_base, 2337 priv->imsg_ring[mbox].imd_phys); 2338 2339 priv->imsg_ring[mbox].imd_base = NULL; 2340 #endif /* CONFIG_PCI_MSI */ 2341 2342 out_dma: 2343 dma_free_coherent(&priv->pdev->dev, 2344 priv->imsg_ring[mbox].size * 8, 2345 priv->imsg_ring[mbox].imfq_base, 2346 priv->imsg_ring[mbox].imfq_phys); 2347 2348 priv->imsg_ring[mbox].imfq_base = NULL; 2349 2350 out_buf: 2351 dma_free_coherent(&priv->pdev->dev, 2352 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE, 2353 priv->imsg_ring[mbox].buf_base, 2354 priv->imsg_ring[mbox].buf_phys); 2355 2356 priv->imsg_ring[mbox].buf_base = NULL; 2357 2358 out: 2359 return rc; 2360 } 2361 2362 /** 2363 * tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox 2364 * @mport: Master port implementing the Inbound Messaging Engine 2365 * @mbox: Mailbox to close 2366 */ 2367 static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox) 2368 { 2369 struct tsi721_device *priv = mport->priv; 2370 u32 rx_slot; 2371 int ch = mbox + 4; 2372 2373 if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */ 2374 return; 2375 priv->imsg_init[mbox] = 0; 2376 2377 /* Disable Inbound Messaging Engine */ 2378 2379 /* Disable Interrupts */ 2380 tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK); 2381 2382 #ifdef CONFIG_PCI_MSI 2383 if (priv->flags & TSI721_USING_MSIX) { 2384 free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector, 2385 (void *)priv); 2386 free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector, 2387 (void *)priv); 2388 } 2389 #endif /* CONFIG_PCI_MSI */ 2390 2391 /* Clear Inbound Buffer Queue */ 2392 for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++) 2393 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL; 2394 2395 /* Free memory allocated for message buffers */ 2396 dma_free_coherent(&priv->pdev->dev, 2397 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE, 2398 priv->imsg_ring[mbox].buf_base, 2399 priv->imsg_ring[mbox].buf_phys); 2400 2401 priv->imsg_ring[mbox].buf_base = NULL; 2402 2403 /* Free memory allocated for free pointr list */ 2404 dma_free_coherent(&priv->pdev->dev, 2405 priv->imsg_ring[mbox].size * 8, 2406 priv->imsg_ring[mbox].imfq_base, 2407 priv->imsg_ring[mbox].imfq_phys); 2408 2409 priv->imsg_ring[mbox].imfq_base = NULL; 2410 2411 /* Free memory allocated for RX descriptors */ 2412 dma_free_coherent(&priv->pdev->dev, 2413 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc), 2414 priv->imsg_ring[mbox].imd_base, 2415 priv->imsg_ring[mbox].imd_phys); 2416 2417 priv->imsg_ring[mbox].imd_base = NULL; 2418 } 2419 2420 /** 2421 * tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue 2422 * @mport: Master port implementing the Inbound Messaging Engine 2423 * @mbox: Inbound mailbox number 2424 * @buf: Buffer to add to inbound queue 2425 */ 2426 static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf) 2427 { 2428 struct tsi721_device *priv = mport->priv; 2429 u32 rx_slot; 2430 int rc = 0; 2431 2432 rx_slot = priv->imsg_ring[mbox].rx_slot; 2433 if (priv->imsg_ring[mbox].imq_base[rx_slot]) { 2434 tsi_err(&priv->pdev->dev, 2435 "Error adding inbound buffer %d, buffer exists", 2436 rx_slot); 2437 rc = -EINVAL; 2438 goto out; 2439 } 2440 2441 priv->imsg_ring[mbox].imq_base[rx_slot] = buf; 2442 2443 if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size) 2444 priv->imsg_ring[mbox].rx_slot = 0; 2445 2446 out: 2447 return rc; 2448 } 2449 2450 /** 2451 * tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue 2452 * @mport: Master port implementing the Inbound Messaging Engine 2453 * @mbox: Inbound mailbox number 2454 * 2455 * Returns pointer to the message on success or NULL on failure. 2456 */ 2457 static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox) 2458 { 2459 struct tsi721_device *priv = mport->priv; 2460 struct tsi721_imsg_desc *desc; 2461 u32 rx_slot; 2462 void *rx_virt = NULL; 2463 u64 rx_phys; 2464 void *buf = NULL; 2465 u64 *free_ptr; 2466 int ch = mbox + 4; 2467 int msg_size; 2468 2469 if (!priv->imsg_init[mbox]) 2470 return NULL; 2471 2472 desc = priv->imsg_ring[mbox].imd_base; 2473 desc += priv->imsg_ring[mbox].desc_rdptr; 2474 2475 if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO)) 2476 goto out; 2477 2478 rx_slot = priv->imsg_ring[mbox].rx_slot; 2479 while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) { 2480 if (++rx_slot == priv->imsg_ring[mbox].size) 2481 rx_slot = 0; 2482 } 2483 2484 rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) | 2485 le32_to_cpu(desc->bufptr_lo); 2486 2487 rx_virt = priv->imsg_ring[mbox].buf_base + 2488 (rx_phys - (u64)priv->imsg_ring[mbox].buf_phys); 2489 2490 buf = priv->imsg_ring[mbox].imq_base[rx_slot]; 2491 msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT; 2492 if (msg_size == 0) 2493 msg_size = RIO_MAX_MSG_SIZE; 2494 2495 memcpy(buf, rx_virt, msg_size); 2496 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL; 2497 2498 desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO); 2499 if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size) 2500 priv->imsg_ring[mbox].desc_rdptr = 0; 2501 2502 iowrite32(priv->imsg_ring[mbox].desc_rdptr, 2503 priv->regs + TSI721_IBDMAC_DQRP(ch)); 2504 2505 /* Return free buffer into the pointer list */ 2506 free_ptr = priv->imsg_ring[mbox].imfq_base; 2507 free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys); 2508 2509 if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size) 2510 priv->imsg_ring[mbox].fq_wrptr = 0; 2511 2512 iowrite32(priv->imsg_ring[mbox].fq_wrptr, 2513 priv->regs + TSI721_IBDMAC_FQWP(ch)); 2514 out: 2515 return buf; 2516 } 2517 2518 /** 2519 * tsi721_messages_init - Initialization of Messaging Engine 2520 * @priv: pointer to tsi721 private data 2521 * 2522 * Configures Tsi721 messaging engine. 2523 */ 2524 static int tsi721_messages_init(struct tsi721_device *priv) 2525 { 2526 int ch; 2527 2528 iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG); 2529 iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT); 2530 iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT); 2531 2532 /* Set SRIO Message Request/Response Timeout */ 2533 iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO); 2534 2535 /* Initialize Inbound Messaging Engine Registers */ 2536 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) { 2537 /* Clear interrupt bits */ 2538 iowrite32(TSI721_IBDMAC_INT_MASK, 2539 priv->regs + TSI721_IBDMAC_INT(ch)); 2540 /* Clear Status */ 2541 iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch)); 2542 2543 iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK, 2544 priv->regs + TSI721_SMSG_ECC_COR_LOG(ch)); 2545 iowrite32(TSI721_SMSG_ECC_NCOR_MASK, 2546 priv->regs + TSI721_SMSG_ECC_NCOR(ch)); 2547 } 2548 2549 return 0; 2550 } 2551 2552 /** 2553 * tsi721_query_mport - Fetch inbound message from the Tsi721 MSG Queue 2554 * @mport: Master port implementing the Inbound Messaging Engine 2555 * @mbox: Inbound mailbox number 2556 * 2557 * Returns pointer to the message on success or NULL on failure. 2558 */ 2559 static int tsi721_query_mport(struct rio_mport *mport, 2560 struct rio_mport_attr *attr) 2561 { 2562 struct tsi721_device *priv = mport->priv; 2563 u32 rval; 2564 2565 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_ERR_STS_CSR(0, 0)); 2566 if (rval & RIO_PORT_N_ERR_STS_PORT_OK) { 2567 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL2_CSR(0, 0)); 2568 attr->link_speed = (rval & RIO_PORT_N_CTL2_SEL_BAUD) >> 28; 2569 rval = ioread32(priv->regs + 0x100 + RIO_PORT_N_CTL_CSR(0, 0)); 2570 attr->link_width = (rval & RIO_PORT_N_CTL_IPW) >> 27; 2571 } else 2572 attr->link_speed = RIO_LINK_DOWN; 2573 2574 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 2575 attr->flags = RIO_MPORT_DMA | RIO_MPORT_DMA_SG; 2576 attr->dma_max_sge = 0; 2577 attr->dma_max_size = TSI721_BDMA_MAX_BCOUNT; 2578 attr->dma_align = 0; 2579 #else 2580 attr->flags = 0; 2581 #endif 2582 return 0; 2583 } 2584 2585 /** 2586 * tsi721_disable_ints - disables all device interrupts 2587 * @priv: pointer to tsi721 private data 2588 */ 2589 static void tsi721_disable_ints(struct tsi721_device *priv) 2590 { 2591 int ch; 2592 2593 /* Disable all device level interrupts */ 2594 iowrite32(0, priv->regs + TSI721_DEV_INTE); 2595 2596 /* Disable all Device Channel interrupts */ 2597 iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE); 2598 2599 /* Disable all Inbound Msg Channel interrupts */ 2600 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) 2601 iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch)); 2602 2603 /* Disable all Outbound Msg Channel interrupts */ 2604 for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++) 2605 iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch)); 2606 2607 /* Disable all general messaging interrupts */ 2608 iowrite32(0, priv->regs + TSI721_SMSG_INTE); 2609 2610 /* Disable all BDMA Channel interrupts */ 2611 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++) 2612 iowrite32(0, 2613 priv->regs + TSI721_DMAC_BASE(ch) + TSI721_DMAC_INTE); 2614 2615 /* Disable all general BDMA interrupts */ 2616 iowrite32(0, priv->regs + TSI721_BDMA_INTE); 2617 2618 /* Disable all SRIO Channel interrupts */ 2619 for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++) 2620 iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch)); 2621 2622 /* Disable all general SR2PC interrupts */ 2623 iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE); 2624 2625 /* Disable all PC2SR interrupts */ 2626 iowrite32(0, priv->regs + TSI721_PC2SR_INTE); 2627 2628 /* Disable all I2C interrupts */ 2629 iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE); 2630 2631 /* Disable SRIO MAC interrupts */ 2632 iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE); 2633 iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN); 2634 } 2635 2636 static struct rio_ops tsi721_rio_ops = { 2637 .lcread = tsi721_lcread, 2638 .lcwrite = tsi721_lcwrite, 2639 .cread = tsi721_cread_dma, 2640 .cwrite = tsi721_cwrite_dma, 2641 .dsend = tsi721_dsend, 2642 .open_inb_mbox = tsi721_open_inb_mbox, 2643 .close_inb_mbox = tsi721_close_inb_mbox, 2644 .open_outb_mbox = tsi721_open_outb_mbox, 2645 .close_outb_mbox = tsi721_close_outb_mbox, 2646 .add_outb_message = tsi721_add_outb_message, 2647 .add_inb_buffer = tsi721_add_inb_buffer, 2648 .get_inb_message = tsi721_get_inb_message, 2649 .map_inb = tsi721_rio_map_inb_mem, 2650 .unmap_inb = tsi721_rio_unmap_inb_mem, 2651 .pwenable = tsi721_pw_enable, 2652 .query_mport = tsi721_query_mport, 2653 .map_outb = tsi721_map_outb_win, 2654 .unmap_outb = tsi721_unmap_outb_win, 2655 }; 2656 2657 static void tsi721_mport_release(struct device *dev) 2658 { 2659 struct rio_mport *mport = to_rio_mport(dev); 2660 2661 tsi_debug(EXIT, dev, "%s id=%d", mport->name, mport->id); 2662 } 2663 2664 /** 2665 * tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port 2666 * @priv: pointer to tsi721 private data 2667 * 2668 * Configures Tsi721 as RapidIO master port. 2669 */ 2670 static int tsi721_setup_mport(struct tsi721_device *priv) 2671 { 2672 struct pci_dev *pdev = priv->pdev; 2673 int err = 0; 2674 struct rio_mport *mport = &priv->mport; 2675 2676 err = rio_mport_initialize(mport); 2677 if (err) 2678 return err; 2679 2680 mport->ops = &tsi721_rio_ops; 2681 mport->index = 0; 2682 mport->sys_size = 0; /* small system */ 2683 mport->priv = (void *)priv; 2684 mport->phys_efptr = 0x100; 2685 mport->phys_rmap = 1; 2686 mport->dev.parent = &pdev->dev; 2687 mport->dev.release = tsi721_mport_release; 2688 2689 INIT_LIST_HEAD(&mport->dbells); 2690 2691 rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff); 2692 rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3); 2693 rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3); 2694 snprintf(mport->name, RIO_MAX_MPORT_NAME, "%s(%s)", 2695 dev_driver_string(&pdev->dev), dev_name(&pdev->dev)); 2696 2697 /* Hook up interrupt handler */ 2698 2699 #ifdef CONFIG_PCI_MSI 2700 if (!tsi721_enable_msix(priv)) 2701 priv->flags |= TSI721_USING_MSIX; 2702 else if (!pci_enable_msi(pdev)) 2703 priv->flags |= TSI721_USING_MSI; 2704 else 2705 tsi_debug(MPORT, &pdev->dev, 2706 "MSI/MSI-X is not available. Using legacy INTx."); 2707 #endif /* CONFIG_PCI_MSI */ 2708 2709 err = tsi721_request_irq(priv); 2710 2711 if (err) { 2712 tsi_err(&pdev->dev, "Unable to get PCI IRQ %02X (err=0x%x)", 2713 pdev->irq, err); 2714 return err; 2715 } 2716 2717 #ifdef CONFIG_RAPIDIO_DMA_ENGINE 2718 err = tsi721_register_dma(priv); 2719 if (err) 2720 goto err_exit; 2721 #endif 2722 /* Enable SRIO link */ 2723 iowrite32(ioread32(priv->regs + TSI721_DEVCTL) | 2724 TSI721_DEVCTL_SRBOOT_CMPL, 2725 priv->regs + TSI721_DEVCTL); 2726 2727 if (mport->host_deviceid >= 0) 2728 iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER | 2729 RIO_PORT_GEN_DISCOVERED, 2730 priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR)); 2731 else 2732 iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR)); 2733 2734 err = rio_register_mport(mport); 2735 if (err) { 2736 tsi721_unregister_dma(priv); 2737 goto err_exit; 2738 } 2739 2740 return 0; 2741 2742 err_exit: 2743 tsi721_free_irq(priv); 2744 return err; 2745 } 2746 2747 static int tsi721_probe(struct pci_dev *pdev, 2748 const struct pci_device_id *id) 2749 { 2750 struct tsi721_device *priv; 2751 int err; 2752 2753 priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL); 2754 if (!priv) { 2755 err = -ENOMEM; 2756 goto err_exit; 2757 } 2758 2759 err = pci_enable_device(pdev); 2760 if (err) { 2761 tsi_err(&pdev->dev, "Failed to enable PCI device"); 2762 goto err_clean; 2763 } 2764 2765 priv->pdev = pdev; 2766 2767 #ifdef DEBUG 2768 { 2769 int i; 2770 2771 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) { 2772 tsi_debug(INIT, &pdev->dev, "res%d %pR", 2773 i, &pdev->resource[i]); 2774 } 2775 } 2776 #endif 2777 /* 2778 * Verify BAR configuration 2779 */ 2780 2781 /* BAR_0 (registers) must be 512KB+ in 32-bit address space */ 2782 if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) || 2783 pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 || 2784 pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) { 2785 tsi_err(&pdev->dev, "Missing or misconfigured CSR BAR0"); 2786 err = -ENODEV; 2787 goto err_disable_pdev; 2788 } 2789 2790 /* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */ 2791 if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) || 2792 pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 || 2793 pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) { 2794 tsi_err(&pdev->dev, "Missing or misconfigured Doorbell BAR1"); 2795 err = -ENODEV; 2796 goto err_disable_pdev; 2797 } 2798 2799 /* 2800 * BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address 2801 * space. 2802 * NOTE: BAR_2 and BAR_4 are not used by this version of driver. 2803 * It may be a good idea to keep them disabled using HW configuration 2804 * to save PCI memory space. 2805 */ 2806 2807 priv->p2r_bar[0].size = priv->p2r_bar[1].size = 0; 2808 2809 if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64) { 2810 if (pci_resource_flags(pdev, BAR_2) & IORESOURCE_PREFETCH) 2811 tsi_debug(INIT, &pdev->dev, 2812 "Prefetchable OBW BAR2 will not be used"); 2813 else { 2814 priv->p2r_bar[0].base = pci_resource_start(pdev, BAR_2); 2815 priv->p2r_bar[0].size = pci_resource_len(pdev, BAR_2); 2816 } 2817 } 2818 2819 if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64) { 2820 if (pci_resource_flags(pdev, BAR_4) & IORESOURCE_PREFETCH) 2821 tsi_debug(INIT, &pdev->dev, 2822 "Prefetchable OBW BAR4 will not be used"); 2823 else { 2824 priv->p2r_bar[1].base = pci_resource_start(pdev, BAR_4); 2825 priv->p2r_bar[1].size = pci_resource_len(pdev, BAR_4); 2826 } 2827 } 2828 2829 err = pci_request_regions(pdev, DRV_NAME); 2830 if (err) { 2831 tsi_err(&pdev->dev, "Unable to obtain PCI resources"); 2832 goto err_disable_pdev; 2833 } 2834 2835 pci_set_master(pdev); 2836 2837 priv->regs = pci_ioremap_bar(pdev, BAR_0); 2838 if (!priv->regs) { 2839 tsi_err(&pdev->dev, "Unable to map device registers space"); 2840 err = -ENOMEM; 2841 goto err_free_res; 2842 } 2843 2844 priv->odb_base = pci_ioremap_bar(pdev, BAR_1); 2845 if (!priv->odb_base) { 2846 tsi_err(&pdev->dev, "Unable to map outbound doorbells space"); 2847 err = -ENOMEM; 2848 goto err_unmap_bars; 2849 } 2850 2851 /* Configure DMA attributes. */ 2852 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { 2853 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 2854 if (err) { 2855 tsi_err(&pdev->dev, "Unable to set DMA mask"); 2856 goto err_unmap_bars; 2857 } 2858 2859 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) 2860 tsi_info(&pdev->dev, "Unable to set consistent DMA mask"); 2861 } else { 2862 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 2863 if (err) 2864 tsi_info(&pdev->dev, "Unable to set consistent DMA mask"); 2865 } 2866 2867 BUG_ON(!pci_is_pcie(pdev)); 2868 2869 /* Clear "no snoop" and "relaxed ordering" bits. */ 2870 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL, 2871 PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN, 0); 2872 2873 /* Override PCIe Maximum Read Request Size setting if requested */ 2874 if (pcie_mrrs >= 0) { 2875 if (pcie_mrrs <= 5) 2876 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL, 2877 PCI_EXP_DEVCTL_READRQ, pcie_mrrs << 12); 2878 else 2879 tsi_info(&pdev->dev, 2880 "Invalid MRRS override value %d", pcie_mrrs); 2881 } 2882 2883 /* Adjust PCIe completion timeout. */ 2884 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL2, 0xf, 0x2); 2885 2886 /* 2887 * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block 2888 */ 2889 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01); 2890 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL, 2891 TSI721_MSIXTBL_OFFSET); 2892 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA, 2893 TSI721_MSIXPBA_OFFSET); 2894 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0); 2895 /* End of FIXUP */ 2896 2897 tsi721_disable_ints(priv); 2898 2899 tsi721_init_pc2sr_mapping(priv); 2900 tsi721_init_sr2pc_mapping(priv); 2901 2902 if (tsi721_bdma_maint_init(priv)) { 2903 tsi_err(&pdev->dev, "BDMA initialization failed"); 2904 err = -ENOMEM; 2905 goto err_unmap_bars; 2906 } 2907 2908 err = tsi721_doorbell_init(priv); 2909 if (err) 2910 goto err_free_bdma; 2911 2912 tsi721_port_write_init(priv); 2913 2914 err = tsi721_messages_init(priv); 2915 if (err) 2916 goto err_free_consistent; 2917 2918 err = tsi721_setup_mport(priv); 2919 if (err) 2920 goto err_free_consistent; 2921 2922 pci_set_drvdata(pdev, priv); 2923 tsi721_interrupts_init(priv); 2924 2925 return 0; 2926 2927 err_free_consistent: 2928 tsi721_port_write_free(priv); 2929 tsi721_doorbell_free(priv); 2930 err_free_bdma: 2931 tsi721_bdma_maint_free(priv); 2932 err_unmap_bars: 2933 if (priv->regs) 2934 iounmap(priv->regs); 2935 if (priv->odb_base) 2936 iounmap(priv->odb_base); 2937 err_free_res: 2938 pci_release_regions(pdev); 2939 pci_clear_master(pdev); 2940 err_disable_pdev: 2941 pci_disable_device(pdev); 2942 err_clean: 2943 kfree(priv); 2944 err_exit: 2945 return err; 2946 } 2947 2948 static void tsi721_remove(struct pci_dev *pdev) 2949 { 2950 struct tsi721_device *priv = pci_get_drvdata(pdev); 2951 2952 tsi_debug(EXIT, &pdev->dev, "enter"); 2953 2954 tsi721_disable_ints(priv); 2955 tsi721_free_irq(priv); 2956 flush_scheduled_work(); 2957 rio_unregister_mport(&priv->mport); 2958 2959 tsi721_unregister_dma(priv); 2960 tsi721_bdma_maint_free(priv); 2961 tsi721_doorbell_free(priv); 2962 tsi721_port_write_free(priv); 2963 tsi721_close_sr2pc_mapping(priv); 2964 2965 if (priv->regs) 2966 iounmap(priv->regs); 2967 if (priv->odb_base) 2968 iounmap(priv->odb_base); 2969 #ifdef CONFIG_PCI_MSI 2970 if (priv->flags & TSI721_USING_MSIX) 2971 pci_disable_msix(priv->pdev); 2972 else if (priv->flags & TSI721_USING_MSI) 2973 pci_disable_msi(priv->pdev); 2974 #endif 2975 pci_release_regions(pdev); 2976 pci_clear_master(pdev); 2977 pci_disable_device(pdev); 2978 pci_set_drvdata(pdev, NULL); 2979 kfree(priv); 2980 tsi_debug(EXIT, &pdev->dev, "exit"); 2981 } 2982 2983 static void tsi721_shutdown(struct pci_dev *pdev) 2984 { 2985 struct tsi721_device *priv = pci_get_drvdata(pdev); 2986 2987 tsi_debug(EXIT, &pdev->dev, "enter"); 2988 2989 tsi721_disable_ints(priv); 2990 tsi721_dma_stop_all(priv); 2991 pci_clear_master(pdev); 2992 pci_disable_device(pdev); 2993 } 2994 2995 static const struct pci_device_id tsi721_pci_tbl[] = { 2996 { PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) }, 2997 { 0, } /* terminate list */ 2998 }; 2999 3000 MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl); 3001 3002 static struct pci_driver tsi721_driver = { 3003 .name = "tsi721", 3004 .id_table = tsi721_pci_tbl, 3005 .probe = tsi721_probe, 3006 .remove = tsi721_remove, 3007 .shutdown = tsi721_shutdown, 3008 }; 3009 3010 module_pci_driver(tsi721_driver); 3011 3012 MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver"); 3013 MODULE_AUTHOR("Integrated Device Technology, Inc."); 3014 MODULE_LICENSE("GPL"); 3015