drivers/rapidio/devices/tsi721.c

   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 #define DEBUG_PW        /* Inbound Port-Write debugging */
  40
  41 static void tsi721_omsg_handler(struct tsi721_device *priv, int ch);
  42 static void tsi721_imsg_handler(struct tsi721_device *priv, int ch);
  43
  44 /**
  45  * tsi721_lcread - read from local SREP config space
  46  * @mport: RapidIO master port info
  47  * @index: ID of RapdiIO interface
  48  * @offset: Offset into configuration space
  49  * @len: Length (in bytes) of the maintenance transaction
  50  * @data: Value to be read into
  51  *
  52  * Generates a local SREP space read. Returns %0 on
  53  * success or %-EINVAL on failure.
  54  */
  55 static int tsi721_lcread(struct rio_mport *mport, int index, u32 offset,
  56                          int len, u32 *data)
  57 {
  58         struct tsi721_device *priv = mport->priv;
  59
  60         if (len != sizeof(u32))
  61                 return -EINVAL; /* only 32-bit access is supported */
  62
  63         *data = ioread32(priv->regs + offset);
  64
  65         return 0;
  66 }
  67
  68 /**
  69  * tsi721_lcwrite - write into local SREP config space
  70  * @mport: RapidIO master port info
  71  * @index: ID of RapdiIO interface
  72  * @offset: Offset into configuration space
  73  * @len: Length (in bytes) of the maintenance transaction
  74  * @data: Value to be written
  75  *
  76  * Generates a local write into SREP configuration space. Returns %0 on
  77  * success or %-EINVAL on failure.
  78  */
  79 static int tsi721_lcwrite(struct rio_mport *mport, int index, u32 offset,
  80                           int len, u32 data)
  81 {
  82         struct tsi721_device *priv = mport->priv;
  83
  84         if (len != sizeof(u32))
  85                 return -EINVAL; /* only 32-bit access is supported */
  86
  87         iowrite32(data, priv->regs + offset);
  88
  89         return 0;
  90 }
  91
  92 /**
  93  * tsi721_maint_dma - Helper function to generate RapidIO maintenance
  94  *                    transactions using designated Tsi721 DMA channel.
  95  * @priv: pointer to tsi721 private data
  96  * @sys_size: RapdiIO transport system size
  97  * @destid: Destination ID of transaction
  98  * @hopcount: Number of hops to target device
  99  * @offset: Offset into configuration space
 100  * @len: Length (in bytes) of the maintenance transaction
 101  * @data: Location to be read from or write into
 102  * @do_wr: Operation flag (1 == MAINT_WR)
 103  *
 104  * Generates a RapidIO maintenance transaction (Read or Write).
 105  * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
 106  */
 107 static int tsi721_maint_dma(struct tsi721_device *priv, u32 sys_size,
 108                         u16 destid, u8 hopcount, u32 offset, int len,
 109                         u32 *data, int do_wr)
 110 {
 111         struct tsi721_dma_desc *bd_ptr;
 112         u32 rd_count, swr_ptr, ch_stat;
 113         int i, err = 0;
 114         u32 op = do_wr ? MAINT_WR : MAINT_RD;
 115
 116         if (offset > (RIO_MAINT_SPACE_SZ - len) || (len != sizeof(u32)))
 117                 return -EINVAL;
 118
 119         bd_ptr = priv->bdma[TSI721_DMACH_MAINT].bd_base;
 120
 121         rd_count = ioread32(
 122                         priv->regs + TSI721_DMAC_DRDCNT(TSI721_DMACH_MAINT));
 123
 124         /* Initialize DMA descriptor */
 125         bd_ptr[0].type_id = cpu_to_le32((DTYPE2 << 29) | (op << 19) | destid);
 126         bd_ptr[0].bcount = cpu_to_le32((sys_size << 26) | 0x04);
 127         bd_ptr[0].raddr_lo = cpu_to_le32((hopcount << 24) | offset);
 128         bd_ptr[0].raddr_hi = 0;
 129         if (do_wr)
 130                 bd_ptr[0].data[0] = cpu_to_be32p(data);
 131         else
 132                 bd_ptr[0].data[0] = 0xffffffff;
 133
 134         mb();
 135
 136         /* Start DMA operation */
 137         iowrite32(rd_count + 2,
 138                 priv->regs + TSI721_DMAC_DWRCNT(TSI721_DMACH_MAINT));
 139         ioread32(priv->regs + TSI721_DMAC_DWRCNT(TSI721_DMACH_MAINT));
 140         i = 0;
 141
 142         /* Wait until DMA transfer is finished */
 143         while ((ch_stat = ioread32(priv->regs +
 144                 TSI721_DMAC_STS(TSI721_DMACH_MAINT))) & TSI721_DMAC_STS_RUN) {
 145                 udelay(1);
 146                 if (++i >= 5000000) {
 147                         dev_dbg(&priv->pdev->dev,
 148                                 "%s : DMA[%d] read timeout ch_status=%x\n",
 149                                 __func__, TSI721_DMACH_MAINT, ch_stat);
 150                         if (!do_wr)
 151                                 *data = 0xffffffff;
 152                         err = -EIO;
 153                         goto err_out;
 154                 }
 155         }
 156
 157         if (ch_stat & TSI721_DMAC_STS_ABORT) {
 158                 /* If DMA operation aborted due to error,
 159                  * reinitialize DMA channel
 160                  */
 161                 dev_dbg(&priv->pdev->dev, "%s : DMA ABORT ch_stat=%x\n",
 162                         __func__, ch_stat);
 163                 dev_dbg(&priv->pdev->dev, "OP=%d : destid=%x hc=%x off=%x\n",
 164                         do_wr ? MAINT_WR : MAINT_RD, destid, hopcount, offset);
 165                 iowrite32(TSI721_DMAC_INT_ALL,
 166                         priv->regs + TSI721_DMAC_INT(TSI721_DMACH_MAINT));
 167                 iowrite32(TSI721_DMAC_CTL_INIT,
 168                         priv->regs + TSI721_DMAC_CTL(TSI721_DMACH_MAINT));
 169                 udelay(10);
 170                 iowrite32(0, priv->regs +
 171                                 TSI721_DMAC_DWRCNT(TSI721_DMACH_MAINT));
 172                 udelay(1);
 173                 if (!do_wr)
 174                         *data = 0xffffffff;
 175                 err = -EIO;
 176                 goto err_out;
 177         }
 178
 179         if (!do_wr)
 180                 *data = be32_to_cpu(bd_ptr[0].data[0]);
 181
 182         /*
 183          * Update descriptor status FIFO RD pointer.
 184          * NOTE: Skipping check and clear FIFO entries because we are waiting
 185          * for transfer to be completed.
 186          */
 187         swr_ptr = ioread32(priv->regs + TSI721_DMAC_DSWP(TSI721_DMACH_MAINT));
 188         iowrite32(swr_ptr, priv->regs + TSI721_DMAC_DSRP(TSI721_DMACH_MAINT));
 189 err_out:
 190
 191         return err;
 192 }
 193
 194 /**
 195  * tsi721_cread_dma - Generate a RapidIO maintenance read transaction
 196  *                    using Tsi721 BDMA engine.
 197  * @mport: RapidIO master port control structure
 198  * @index: ID of RapdiIO interface
 199  * @destid: Destination ID of transaction
 200  * @hopcount: Number of hops to target device
 201  * @offset: Offset into configuration space
 202  * @len: Length (in bytes) of the maintenance transaction
 203  * @val: Location to be read into
 204  *
 205  * Generates a RapidIO maintenance read transaction.
 206  * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
 207  */
 208 static int tsi721_cread_dma(struct rio_mport *mport, int index, u16 destid,
 209                         u8 hopcount, u32 offset, int len, u32 *data)
 210 {
 211         struct tsi721_device *priv = mport->priv;
 212
 213         return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
 214                                 offset, len, data, 0);
 215 }
 216
 217 /**
 218  * tsi721_cwrite_dma - Generate a RapidIO maintenance write transaction
 219  *                     using Tsi721 BDMA engine
 220  * @mport: RapidIO master port control structure
 221  * @index: ID of RapdiIO interface
 222  * @destid: Destination ID of transaction
 223  * @hopcount: Number of hops to target device
 224  * @offset: Offset into configuration space
 225  * @len: Length (in bytes) of the maintenance transaction
 226  * @val: Value to be written
 227  *
 228  * Generates a RapidIO maintenance write transaction.
 229  * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
 230  */
 231 static int tsi721_cwrite_dma(struct rio_mport *mport, int index, u16 destid,
 232                          u8 hopcount, u32 offset, int len, u32 data)
 233 {
 234         struct tsi721_device *priv = mport->priv;
 235         u32 temp = data;
 236
 237         return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
 238                                 offset, len, &temp, 1);
 239 }
 240
 241 /**
 242  * tsi721_pw_handler - Tsi721 inbound port-write interrupt handler
 243  * @mport: RapidIO master port structure
 244  *
 245  * Handles inbound port-write interrupts. Copies PW message from an internal
 246  * buffer into PW message FIFO and schedules deferred routine to process
 247  * queued messages.
 248  */
 249 static int
 250 tsi721_pw_handler(struct rio_mport *mport)
 251 {
 252         struct tsi721_device *priv = mport->priv;
 253         u32 pw_stat;
 254         u32 pw_buf[TSI721_RIO_PW_MSG_SIZE/sizeof(u32)];
 255
 256
 257         pw_stat = ioread32(priv->regs + TSI721_RIO_PW_RX_STAT);
 258
 259         if (pw_stat & TSI721_RIO_PW_RX_STAT_PW_VAL) {
 260                 pw_buf[0] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(0));
 261                 pw_buf[1] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(1));
 262                 pw_buf[2] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(2));
 263                 pw_buf[3] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(3));
 264
 265                 /* Queue PW message (if there is room in FIFO),
 266                  * otherwise discard it.
 267                  */
 268                 spin_lock(&priv->pw_fifo_lock);
 269                 if (kfifo_avail(&priv->pw_fifo) >= TSI721_RIO_PW_MSG_SIZE)
 270                         kfifo_in(&priv->pw_fifo, pw_buf,
 271                                                 TSI721_RIO_PW_MSG_SIZE);
 272                 else
 273                         priv->pw_discard_count++;
 274                 spin_unlock(&priv->pw_fifo_lock);
 275         }
 276
 277         /* Clear pending PW interrupts */
 278         iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
 279                   priv->regs + TSI721_RIO_PW_RX_STAT);
 280
 281         schedule_work(&priv->pw_work);
 282
 283         return 0;
 284 }
 285
 286 static void tsi721_pw_dpc(struct work_struct *work)
 287 {
 288         struct tsi721_device *priv = container_of(work, struct tsi721_device,
 289                                                     pw_work);
 290         u32 msg_buffer[RIO_PW_MSG_SIZE/sizeof(u32)]; /* Use full size PW message
 291                                                         buffer for RIO layer */
 292
 293         /*
 294          * Process port-write messages
 295          */
 296         while (kfifo_out_spinlocked(&priv->pw_fifo, (unsigned char *)msg_buffer,
 297                          TSI721_RIO_PW_MSG_SIZE, &priv->pw_fifo_lock)) {
 298                 /* Process one message */
 299 #ifdef DEBUG_PW
 300                 {
 301                 u32 i;
 302                 pr_debug("%s : Port-Write Message:", __func__);
 303                 for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32); ) {
 304                         pr_debug("0x%02x: %08x %08x %08x %08x", i*4,
 305                                 msg_buffer[i], msg_buffer[i + 1],
 306                                 msg_buffer[i + 2], msg_buffer[i + 3]);
 307                         i += 4;
 308                 }
 309                 pr_debug("\n");
 310                 }
 311 #endif
 312                 /* Pass the port-write message to RIO core for processing */
 313                 rio_inb_pwrite_handler((union rio_pw_msg *)msg_buffer);
 314         }
 315 }
 316
 317 /**
 318  * tsi721_pw_enable - enable/disable port-write interface init
 319  * @mport: Master port implementing the port write unit
 320  * @enable:    1=enable; 0=disable port-write message handling
 321  */
 322 static int tsi721_pw_enable(struct rio_mport *mport, int enable)
 323 {
 324         struct tsi721_device *priv = mport->priv;
 325         u32 rval;
 326
 327         rval = ioread32(priv->regs + TSI721_RIO_EM_INT_ENABLE);
 328
 329         if (enable)
 330                 rval |= TSI721_RIO_EM_INT_ENABLE_PW_RX;
 331         else
 332                 rval &= ~TSI721_RIO_EM_INT_ENABLE_PW_RX;
 333
 334         /* Clear pending PW interrupts */
 335         iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
 336                   priv->regs + TSI721_RIO_PW_RX_STAT);
 337         /* Update enable bits */
 338         iowrite32(rval, priv->regs + TSI721_RIO_EM_INT_ENABLE);
 339
 340         return 0;
 341 }
 342
 343 /**
 344  * tsi721_dsend - Send a RapidIO doorbell
 345  * @mport: RapidIO master port info
 346  * @index: ID of RapidIO interface
 347  * @destid: Destination ID of target device
 348  * @data: 16-bit info field of RapidIO doorbell
 349  *
 350  * Sends a RapidIO doorbell message. Always returns %0.
 351  */
 352 static int tsi721_dsend(struct rio_mport *mport, int index,
 353                         u16 destid, u16 data)
 354 {
 355         struct tsi721_device *priv = mport->priv;
 356         u32 offset;
 357
 358         offset = (((mport->sys_size) ? RIO_TT_CODE_16 : RIO_TT_CODE_8) << 18) |
 359                  (destid << 2);
 360
 361         dev_dbg(&priv->pdev->dev,
 362                 "Send Doorbell 0x%04x to destID 0x%x\n", data, destid);
 363         iowrite16be(data, priv->odb_base + offset);
 364
 365         return 0;
 366 }
 367
 368 /**
 369  * tsi721_dbell_handler - Tsi721 doorbell interrupt handler
 370  * @mport: RapidIO master port structure
 371  *
 372  * Handles inbound doorbell interrupts. Copies doorbell entry from an internal
 373  * buffer into DB message FIFO and schedules deferred  routine to process
 374  * queued DBs.
 375  */
 376 static int
 377 tsi721_dbell_handler(struct rio_mport *mport)
 378 {
 379         struct tsi721_device *priv = mport->priv;
 380         u32 regval;
 381
 382         /* Disable IDB interrupts */
 383         regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
 384         regval &= ~TSI721_SR_CHINT_IDBQRCV;
 385         iowrite32(regval,
 386                 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
 387
 388         schedule_work(&priv->idb_work);
 389
 390         return 0;
 391 }
 392
 393 static void tsi721_db_dpc(struct work_struct *work)
 394 {
 395         struct tsi721_device *priv = container_of(work, struct tsi721_device,
 396                                                     idb_work);
 397         struct rio_mport *mport;
 398         struct rio_dbell *dbell;
 399         int found = 0;
 400         u32 wr_ptr, rd_ptr;
 401         u64 *idb_entry;
 402         u32 regval;
 403         union {
 404                 u64 msg;
 405                 u8  bytes[8];
 406         } idb;
 407
 408         /*
 409          * Process queued inbound doorbells
 410          */
 411         mport = priv->mport;
 412
 413         wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE));
 414         rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
 415
 416         while (wr_ptr != rd_ptr) {
 417                 idb_entry = (u64 *)(priv->idb_base +
 418                                         (TSI721_IDB_ENTRY_SIZE * rd_ptr));
 419                 rd_ptr++;
 420                 idb.msg = *idb_entry;
 421                 *idb_entry = 0;
 422
 423                 /* Process one doorbell */
 424                 list_for_each_entry(dbell, &mport->dbells, node) {
 425                         if ((dbell->res->start <= DBELL_INF(idb.bytes)) &&
 426                             (dbell->res->end >= DBELL_INF(idb.bytes))) {
 427                                 found = 1;
 428                                 break;
 429                         }
 430                 }
 431
 432                 if (found) {
 433                         dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes),
 434                                     DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
 435                 } else {
 436                         dev_dbg(&priv->pdev->dev,
 437                                 "spurious inb doorbell, sid %2.2x tid %2.2x"
 438                                 " info %4.4x\n", DBELL_SID(idb.bytes),
 439                                 DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
 440                 }
 441         }
 442
 443         iowrite32(rd_ptr & (IDB_QSIZE - 1),
 444                 priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
 445
 446         /* Re-enable IDB interrupts */
 447         regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
 448         regval |= TSI721_SR_CHINT_IDBQRCV;
 449         iowrite32(regval,
 450                 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
 451 }
 452
 453 /**
 454  * tsi721_irqhandler - Tsi721 interrupt handler
 455  * @irq: Linux interrupt number
 456  * @ptr: Pointer to interrupt-specific data (mport structure)
 457  *
 458  * Handles Tsi721 interrupts signaled using MSI and INTA. Checks reported
 459  * interrupt events and calls an event-specific handler(s).
 460  */
 461 static irqreturn_t tsi721_irqhandler(int irq, void *ptr)
 462 {
 463         struct rio_mport *mport = (struct rio_mport *)ptr;
 464         struct tsi721_device *priv = mport->priv;
 465         u32 dev_int;
 466         u32 dev_ch_int;
 467         u32 intval;
 468         u32 ch_inte;
 469
 470         dev_int = ioread32(priv->regs + TSI721_DEV_INT);
 471         if (!dev_int)
 472                 return IRQ_NONE;
 473
 474         dev_ch_int = ioread32(priv->regs + TSI721_DEV_CHAN_INT);
 475
 476         if (dev_int & TSI721_DEV_INT_SR2PC_CH) {
 477                 /* Service SR2PC Channel interrupts */
 478                 if (dev_ch_int & TSI721_INT_SR2PC_CHAN(IDB_QUEUE)) {
 479                         /* Service Inbound Doorbell interrupt */
 480                         intval = ioread32(priv->regs +
 481                                                 TSI721_SR_CHINT(IDB_QUEUE));
 482                         if (intval & TSI721_SR_CHINT_IDBQRCV)
 483                                 tsi721_dbell_handler(mport);
 484                         else
 485                                 dev_info(&priv->pdev->dev,
 486                                         "Unsupported SR_CH_INT %x\n", intval);
 487
 488                         /* Clear interrupts */
 489                         iowrite32(intval,
 490                                 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
 491                         ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
 492                 }
 493         }
 494
 495         if (dev_int & TSI721_DEV_INT_SMSG_CH) {
 496                 int ch;
 497
 498                 /*
 499                  * Service channel interrupts from Messaging Engine
 500                  */
 501
 502                 if (dev_ch_int & TSI721_INT_IMSG_CHAN_M) { /* Inbound Msg */
 503                         /* Disable signaled OB MSG Channel interrupts */
 504                         ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
 505                         ch_inte &= ~(dev_ch_int & TSI721_INT_IMSG_CHAN_M);
 506                         iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
 507
 508                         /*
 509                          * Process Inbound Message interrupt for each MBOX
 510                          */
 511                         for (ch = 4; ch < RIO_MAX_MBOX + 4; ch++) {
 512                                 if (!(dev_ch_int & TSI721_INT_IMSG_CHAN(ch)))
 513                                         continue;
 514                                 tsi721_imsg_handler(priv, ch);
 515                         }
 516                 }
 517
 518                 if (dev_ch_int & TSI721_INT_OMSG_CHAN_M) { /* Outbound Msg */
 519                         /* Disable signaled OB MSG Channel interrupts */
 520                         ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
 521                         ch_inte &= ~(dev_ch_int & TSI721_INT_OMSG_CHAN_M);
 522                         iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
 523
 524                         /*
 525                          * Process Outbound Message interrupts for each MBOX
 526                          */
 527
 528                         for (ch = 0; ch < RIO_MAX_MBOX; ch++) {
 529                                 if (!(dev_ch_int & TSI721_INT_OMSG_CHAN(ch)))
 530                                         continue;
 531                                 tsi721_omsg_handler(priv, ch);
 532                         }
 533                 }
 534         }
 535
 536         if (dev_int & TSI721_DEV_INT_SRIO) {
 537                 /* Service SRIO MAC interrupts */
 538                 intval = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
 539                 if (intval & TSI721_RIO_EM_INT_STAT_PW_RX)
 540                         tsi721_pw_handler(mport);
 541         }
 542
 543         return IRQ_HANDLED;
 544 }
 545
 546 static void tsi721_interrupts_init(struct tsi721_device *priv)
 547 {
 548         u32 intr;
 549
 550         /* Enable IDB interrupts */
 551         iowrite32(TSI721_SR_CHINT_ALL,
 552                 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
 553         iowrite32(TSI721_SR_CHINT_IDBQRCV,
 554                 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
 555         iowrite32(TSI721_INT_SR2PC_CHAN(IDB_QUEUE),
 556                 priv->regs + TSI721_DEV_CHAN_INTE);
 557
 558         /* Enable SRIO MAC interrupts */
 559         iowrite32(TSI721_RIO_EM_DEV_INT_EN_INT,
 560                 priv->regs + TSI721_RIO_EM_DEV_INT_EN);
 561
 562         if (priv->flags & TSI721_USING_MSIX)
 563                 intr = TSI721_DEV_INT_SRIO;
 564         else
 565                 intr = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
 566                         TSI721_DEV_INT_SMSG_CH;
 567
 568         iowrite32(intr, priv->regs + TSI721_DEV_INTE);
 569         ioread32(priv->regs + TSI721_DEV_INTE);
 570 }
 571
 572 #ifdef CONFIG_PCI_MSI
 573 /**
 574  * tsi721_omsg_msix - MSI-X interrupt handler for outbound messaging
 575  * @irq: Linux interrupt number
 576  * @ptr: Pointer to interrupt-specific data (mport structure)
 577  *
 578  * Handles outbound messaging interrupts signaled using MSI-X.
 579  */
 580 static irqreturn_t tsi721_omsg_msix(int irq, void *ptr)
 581 {
 582         struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
 583         int mbox;
 584
 585         mbox = (irq - priv->msix[TSI721_VECT_OMB0_DONE].vector) % RIO_MAX_MBOX;
 586         tsi721_omsg_handler(priv, mbox);
 587         return IRQ_HANDLED;
 588 }
 589
 590 /**
 591  * tsi721_imsg_msix - MSI-X interrupt handler for inbound messaging
 592  * @irq: Linux interrupt number
 593  * @ptr: Pointer to interrupt-specific data (mport structure)
 594  *
 595  * Handles inbound messaging interrupts signaled using MSI-X.
 596  */
 597 static irqreturn_t tsi721_imsg_msix(int irq, void *ptr)
 598 {
 599         struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
 600         int mbox;
 601
 602         mbox = (irq - priv->msix[TSI721_VECT_IMB0_RCV].vector) % RIO_MAX_MBOX;
 603         tsi721_imsg_handler(priv, mbox + 4);
 604         return IRQ_HANDLED;
 605 }
 606
 607 /**
 608  * tsi721_srio_msix - Tsi721 MSI-X SRIO MAC interrupt handler
 609  * @irq: Linux interrupt number
 610  * @ptr: Pointer to interrupt-specific data (mport structure)
 611  *
 612  * Handles Tsi721 interrupts from SRIO MAC.
 613  */
 614 static irqreturn_t tsi721_srio_msix(int irq, void *ptr)
 615 {
 616         struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
 617         u32 srio_int;
 618
 619         /* Service SRIO MAC interrupts */
 620         srio_int = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
 621         if (srio_int & TSI721_RIO_EM_INT_STAT_PW_RX)
 622                 tsi721_pw_handler((struct rio_mport *)ptr);
 623
 624         return IRQ_HANDLED;
 625 }
 626
 627 /**
 628  * tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler
 629  * @irq: Linux interrupt number
 630  * @ptr: Pointer to interrupt-specific data (mport structure)
 631  *
 632  * Handles Tsi721 interrupts from SR2PC Channel.
 633  * NOTE: At this moment services only one SR2PC channel associated with inbound
 634  * doorbells.
 635  */
 636 static irqreturn_t tsi721_sr2pc_ch_msix(int irq, void *ptr)
 637 {
 638         struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
 639         u32 sr_ch_int;
 640
 641         /* Service Inbound DB interrupt from SR2PC channel */
 642         sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
 643         if (sr_ch_int & TSI721_SR_CHINT_IDBQRCV)
 644                 tsi721_dbell_handler((struct rio_mport *)ptr);
 645
 646         /* Clear interrupts */
 647         iowrite32(sr_ch_int, priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
 648         /* Read back to ensure that interrupt was cleared */
 649         sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
 650
 651         return IRQ_HANDLED;
 652 }
 653
 654 /**
 655  * tsi721_request_msix - register interrupt service for MSI-X mode.
 656  * @mport: RapidIO master port structure
 657  *
 658  * Registers MSI-X interrupt service routines for interrupts that are active
 659  * immediately after mport initialization. Messaging interrupt service routines
 660  * should be registered during corresponding open requests.
 661  */
 662 static int tsi721_request_msix(struct rio_mport *mport)
 663 {
 664         struct tsi721_device *priv = mport->priv;
 665         int err = 0;
 666
 667         err = request_irq(priv->msix[TSI721_VECT_IDB].vector,
 668                         tsi721_sr2pc_ch_msix, 0,
 669                         priv->msix[TSI721_VECT_IDB].irq_name, (void *)mport);
 670         if (err)
 671                 goto out;
 672
 673         err = request_irq(priv->msix[TSI721_VECT_PWRX].vector,
 674                         tsi721_srio_msix, 0,
 675                         priv->msix[TSI721_VECT_PWRX].irq_name, (void *)mport);
 676         if (err)
 677                 free_irq(
 678                         priv->msix[TSI721_VECT_IDB].vector,
 679                         (void *)mport);
 680 out:
 681         return err;
 682 }
 683
 684 /**
 685  * tsi721_enable_msix - Attempts to enable MSI-X support for Tsi721.
 686  * @priv: pointer to tsi721 private data
 687  *
 688  * Configures MSI-X support for Tsi721. Supports only an exact number
 689  * of requested vectors.
 690  */
 691 static int tsi721_enable_msix(struct tsi721_device *priv)
 692 {
 693         struct msix_entry entries[TSI721_VECT_MAX];
 694         int err;
 695         int i;
 696
 697         entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE);
 698         entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT;
 699
 700         /*
 701          * Initialize MSI-X entries for Messaging Engine:
 702          * this driver supports four RIO mailboxes (inbound and outbound)
 703          * NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore
 704          * offset +4 is added to IB MBOX number.
 705          */
 706         for (i = 0; i < RIO_MAX_MBOX; i++) {
 707                 entries[TSI721_VECT_IMB0_RCV + i].entry =
 708                                         TSI721_MSIX_IMSG_DQ_RCV(i + 4);
 709                 entries[TSI721_VECT_IMB0_INT + i].entry =
 710                                         TSI721_MSIX_IMSG_INT(i + 4);
 711                 entries[TSI721_VECT_OMB0_DONE + i].entry =
 712                                         TSI721_MSIX_OMSG_DONE(i);
 713                 entries[TSI721_VECT_OMB0_INT + i].entry =
 714                                         TSI721_MSIX_OMSG_INT(i);
 715         }
 716
 717         err = pci_enable_msix(priv->pdev, entries, ARRAY_SIZE(entries));
 718         if (err) {
 719                 if (err > 0)
 720                         dev_info(&priv->pdev->dev,
 721                                  "Only %d MSI-X vectors available, "
 722                                  "not using MSI-X\n", err);
 723                 return err;
 724         }
 725
 726         /*
 727          * Copy MSI-X vector information into tsi721 private structure
 728          */
 729         priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector;
 730         snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX,
 731                  DRV_NAME "-idb@pci:%s", pci_name(priv->pdev));
 732         priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector;
 733         snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX,
 734                  DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev));
 735
 736         for (i = 0; i < RIO_MAX_MBOX; i++) {
 737                 priv->msix[TSI721_VECT_IMB0_RCV + i].vector =
 738                                 entries[TSI721_VECT_IMB0_RCV + i].vector;
 739                 snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name,
 740                          IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s",
 741                          i, pci_name(priv->pdev));
 742
 743                 priv->msix[TSI721_VECT_IMB0_INT + i].vector =
 744                                 entries[TSI721_VECT_IMB0_INT + i].vector;
 745                 snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name,
 746                          IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s",
 747                          i, pci_name(priv->pdev));
 748
 749                 priv->msix[TSI721_VECT_OMB0_DONE + i].vector =
 750                                 entries[TSI721_VECT_OMB0_DONE + i].vector;
 751                 snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name,
 752                          IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s",
 753                          i, pci_name(priv->pdev));
 754
 755                 priv->msix[TSI721_VECT_OMB0_INT + i].vector =
 756                                 entries[TSI721_VECT_OMB0_INT + i].vector;
 757                 snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name,
 758                          IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s",
 759                          i, pci_name(priv->pdev));
 760         }
 761
 762         return 0;
 763 }
 764 #endif /* CONFIG_PCI_MSI */
 765
 766 static int tsi721_request_irq(struct rio_mport *mport)
 767 {
 768         struct tsi721_device *priv = mport->priv;
 769         int err;
 770
 771 #ifdef CONFIG_PCI_MSI
 772         if (priv->flags & TSI721_USING_MSIX)
 773                 err = tsi721_request_msix(mport);
 774         else
 775 #endif
 776                 err = request_irq(priv->pdev->irq, tsi721_irqhandler,
 777                           (priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED,
 778                           DRV_NAME, (void *)mport);
 779
 780         if (err)
 781                 dev_err(&priv->pdev->dev,
 782                         "Unable to allocate interrupt, Error: %d\n", err);
 783
 784         return err;
 785 }
 786
 787 /**
 788  * tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO)
 789  * translation regions.
 790  * @priv: pointer to tsi721 private data
 791  *
 792  * Disables SREP translation regions.
 793  */
 794 static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv)
 795 {
 796         int i;
 797
 798         /* Disable all PC2SR translation windows */
 799         for (i = 0; i < TSI721_OBWIN_NUM; i++)
 800                 iowrite32(0, priv->regs + TSI721_OBWINLB(i));
 801 }
 802
 803 /**
 804  * tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe)
 805  * translation regions.
 806  * @priv: pointer to tsi721 private data
 807  *
 808  * Disables inbound windows.
 809  */
 810 static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv)
 811 {
 812         int i;
 813
 814         /* Disable all SR2PC inbound windows */
 815         for (i = 0; i < TSI721_IBWIN_NUM; i++)
 816                 iowrite32(0, priv->regs + TSI721_IBWINLB(i));
 817 }
 818
 819 /**
 820  * tsi721_port_write_init - Inbound port write interface init
 821  * @priv: pointer to tsi721 private data
 822  *
 823  * Initializes inbound port write handler.
 824  * Returns %0 on success or %-ENOMEM on failure.
 825  */
 826 static int tsi721_port_write_init(struct tsi721_device *priv)
 827 {
 828         priv->pw_discard_count = 0;
 829         INIT_WORK(&priv->pw_work, tsi721_pw_dpc);
 830         spin_lock_init(&priv->pw_fifo_lock);
 831         if (kfifo_alloc(&priv->pw_fifo,
 832                         TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) {
 833                 dev_err(&priv->pdev->dev, "PW FIFO allocation failed\n");
 834                 return -ENOMEM;
 835         }
 836
 837         /* Use reliable port-write capture mode */
 838         iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL);
 839         return 0;
 840 }
 841
 842 static int tsi721_doorbell_init(struct tsi721_device *priv)
 843 {
 844         /* Outbound Doorbells do not require any setup.
 845          * Tsi721 uses dedicated PCI BAR1 to generate doorbells.
 846          * That BAR1 was mapped during the probe routine.
 847          */
 848
 849         /* Initialize Inbound Doorbell processing DPC and queue */
 850         priv->db_discard_count = 0;
 851         INIT_WORK(&priv->idb_work, tsi721_db_dpc);
 852
 853         /* Allocate buffer for inbound doorbells queue */
 854         priv->idb_base = dma_zalloc_coherent(&priv->pdev->dev,
 855                                 IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
 856                                 &priv->idb_dma, GFP_KERNEL);
 857         if (!priv->idb_base)
 858                 return -ENOMEM;
 859
 860         dev_dbg(&priv->pdev->dev, "Allocated IDB buffer @ %p (phys = %llx)\n",
 861                 priv->idb_base, (unsigned long long)priv->idb_dma);
 862
 863         iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE),
 864                 priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE));
 865         iowrite32(((u64)priv->idb_dma >> 32),
 866                 priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE));
 867         iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR),
 868                 priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE));
 869         /* Enable accepting all inbound doorbells */
 870         iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE));
 871
 872         iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE));
 873
 874         iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
 875
 876         return 0;
 877 }
 878
 879 static void tsi721_doorbell_free(struct tsi721_device *priv)
 880 {
 881         if (priv->idb_base == NULL)
 882                 return;
 883
 884         /* Free buffer allocated for inbound doorbell queue */
 885         dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
 886                           priv->idb_base, priv->idb_dma);
 887         priv->idb_base = NULL;
 888 }
 889
 890 static int tsi721_bdma_ch_init(struct tsi721_device *priv, int chnum)
 891 {
 892         struct tsi721_dma_desc *bd_ptr;
 893         u64             *sts_ptr;
 894         dma_addr_t      bd_phys, sts_phys;
 895         int             sts_size;
 896         int             bd_num = priv->bdma[chnum].bd_num;
 897
 898         dev_dbg(&priv->pdev->dev, "Init Block DMA Engine, CH%d\n", chnum);
 899
 900         /*
 901          * Initialize DMA channel for maintenance requests
 902          */
 903
 904         /* Allocate space for DMA descriptors */
 905         bd_ptr = dma_zalloc_coherent(&priv->pdev->dev,
 906                                         bd_num * sizeof(struct tsi721_dma_desc),
 907                                         &bd_phys, GFP_KERNEL);
 908         if (!bd_ptr)
 909                 return -ENOMEM;
 910
 911         priv->bdma[chnum].bd_phys = bd_phys;
 912         priv->bdma[chnum].bd_base = bd_ptr;
 913
 914         dev_dbg(&priv->pdev->dev, "DMA descriptors @ %p (phys = %llx)\n",
 915                 bd_ptr, (unsigned long long)bd_phys);
 916
 917         /* Allocate space for descriptor status FIFO */
 918         sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ?
 919                                         bd_num : TSI721_DMA_MINSTSSZ;
 920         sts_size = roundup_pow_of_two(sts_size);
 921         sts_ptr = dma_zalloc_coherent(&priv->pdev->dev,
 922                                      sts_size * sizeof(struct tsi721_dma_sts),
 923                                      &sts_phys, GFP_KERNEL);
 924         if (!sts_ptr) {
 925                 /* Free space allocated for DMA descriptors */
 926                 dma_free_coherent(&priv->pdev->dev,
 927                                   bd_num * sizeof(struct tsi721_dma_desc),
 928                                   bd_ptr, bd_phys);
 929                 priv->bdma[chnum].bd_base = NULL;
 930                 return -ENOMEM;
 931         }
 932
 933         priv->bdma[chnum].sts_phys = sts_phys;
 934         priv->bdma[chnum].sts_base = sts_ptr;
 935         priv->bdma[chnum].sts_size = sts_size;
 936
 937         dev_dbg(&priv->pdev->dev,
 938                 "desc status FIFO @ %p (phys = %llx) size=0x%x\n",
 939                 sts_ptr, (unsigned long long)sts_phys, sts_size);
 940
 941         /* Initialize DMA descriptors ring */
 942         bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29);
 943         bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys &
 944                                                  TSI721_DMAC_DPTRL_MASK);
 945         bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32);
 946
 947         /* Setup DMA descriptor pointers */
 948         iowrite32(((u64)bd_phys >> 32),
 949                 priv->regs + TSI721_DMAC_DPTRH(chnum));
 950         iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK),
 951                 priv->regs + TSI721_DMAC_DPTRL(chnum));
 952
 953         /* Setup descriptor status FIFO */
 954         iowrite32(((u64)sts_phys >> 32),
 955                 priv->regs + TSI721_DMAC_DSBH(chnum));
 956         iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK),
 957                 priv->regs + TSI721_DMAC_DSBL(chnum));
 958         iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size),
 959                 priv->regs + TSI721_DMAC_DSSZ(chnum));
 960
 961         /* Clear interrupt bits */
 962         iowrite32(TSI721_DMAC_INT_ALL,
 963                 priv->regs + TSI721_DMAC_INT(chnum));
 964
 965         ioread32(priv->regs + TSI721_DMAC_INT(chnum));
 966
 967         /* Toggle DMA channel initialization */
 968         iowrite32(TSI721_DMAC_CTL_INIT, priv->regs + TSI721_DMAC_CTL(chnum));
 969         ioread32(priv->regs + TSI721_DMAC_CTL(chnum));
 970         udelay(10);
 971
 972         return 0;
 973 }
 974
 975 static int tsi721_bdma_ch_free(struct tsi721_device *priv, int chnum)
 976 {
 977         u32 ch_stat;
 978
 979         if (priv->bdma[chnum].bd_base == NULL)
 980                 return 0;
 981
 982         /* Check if DMA channel still running */
 983         ch_stat = ioread32(priv->regs + TSI721_DMAC_STS(chnum));
 984         if (ch_stat & TSI721_DMAC_STS_RUN)
 985                 return -EFAULT;
 986
 987         /* Put DMA channel into init state */
 988         iowrite32(TSI721_DMAC_CTL_INIT,
 989                 priv->regs + TSI721_DMAC_CTL(chnum));
 990
 991         /* Free space allocated for DMA descriptors */
 992         dma_free_coherent(&priv->pdev->dev,
 993                 priv->bdma[chnum].bd_num * sizeof(struct tsi721_dma_desc),
 994                 priv->bdma[chnum].bd_base, priv->bdma[chnum].bd_phys);
 995         priv->bdma[chnum].bd_base = NULL;
 996
 997         /* Free space allocated for status FIFO */
 998         dma_free_coherent(&priv->pdev->dev,
 999                 priv->bdma[chnum].sts_size * sizeof(struct tsi721_dma_sts),
1000                 priv->bdma[chnum].sts_base, priv->bdma[chnum].sts_phys);
1001         priv->bdma[chnum].sts_base = NULL;
1002         return 0;
1003 }
1004
1005 static int tsi721_bdma_init(struct tsi721_device *priv)
1006 {
1007         /* Initialize BDMA channel allocated for RapidIO maintenance read/write
1008          * request generation
1009          */
1010         priv->bdma[TSI721_DMACH_MAINT].bd_num = 2;
1011         if (tsi721_bdma_ch_init(priv, TSI721_DMACH_MAINT)) {
1012                 dev_err(&priv->pdev->dev, "Unable to initialize maintenance DMA"
1013                         " channel %d, aborting\n", TSI721_DMACH_MAINT);
1014                 return -ENOMEM;
1015         }
1016
1017         return 0;
1018 }
1019
1020 static void tsi721_bdma_free(struct tsi721_device *priv)
1021 {
1022         tsi721_bdma_ch_free(priv, TSI721_DMACH_MAINT);
1023 }
1024
1025 /* Enable Inbound Messaging Interrupts */
1026 static void
1027 tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch,
1028                                   u32 inte_mask)
1029 {
1030         u32 rval;
1031
1032         if (!inte_mask)
1033                 return;
1034
1035         /* Clear pending Inbound Messaging interrupts */
1036         iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1037
1038         /* Enable Inbound Messaging interrupts */
1039         rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1040         iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch));
1041
1042         if (priv->flags & TSI721_USING_MSIX)
1043                 return; /* Finished if we are in MSI-X mode */
1044
1045         /*
1046          * For MSI and INTA interrupt signalling we need to enable next levels
1047          */
1048
1049         /* Enable Device Channel Interrupt */
1050         rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1051         iowrite32(rval | TSI721_INT_IMSG_CHAN(ch),
1052                   priv->regs + TSI721_DEV_CHAN_INTE);
1053 }
1054
1055 /* Disable Inbound Messaging Interrupts */
1056 static void
1057 tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch,
1058                                    u32 inte_mask)
1059 {
1060         u32 rval;
1061
1062         if (!inte_mask)
1063                 return;
1064
1065         /* Clear pending Inbound Messaging interrupts */
1066         iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1067
1068         /* Disable Inbound Messaging interrupts */
1069         rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1070         rval &= ~inte_mask;
1071         iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch));
1072
1073         if (priv->flags & TSI721_USING_MSIX)
1074                 return; /* Finished if we are in MSI-X mode */
1075
1076         /*
1077          * For MSI and INTA interrupt signalling we need to disable next levels
1078          */
1079
1080         /* Disable Device Channel Interrupt */
1081         rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1082         rval &= ~TSI721_INT_IMSG_CHAN(ch);
1083         iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1084 }
1085
1086 /* Enable Outbound Messaging interrupts */
1087 static void
1088 tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch,
1089                                   u32 inte_mask)
1090 {
1091         u32 rval;
1092
1093         if (!inte_mask)
1094                 return;
1095
1096         /* Clear pending Outbound Messaging interrupts */
1097         iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1098
1099         /* Enable Outbound Messaging channel interrupts */
1100         rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1101         iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch));
1102
1103         if (priv->flags & TSI721_USING_MSIX)
1104                 return; /* Finished if we are in MSI-X mode */
1105
1106         /*
1107          * For MSI and INTA interrupt signalling we need to enable next levels
1108          */
1109
1110         /* Enable Device Channel Interrupt */
1111         rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1112         iowrite32(rval | TSI721_INT_OMSG_CHAN(ch),
1113                   priv->regs + TSI721_DEV_CHAN_INTE);
1114 }
1115
1116 /* Disable Outbound Messaging interrupts */
1117 static void
1118 tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch,
1119                                    u32 inte_mask)
1120 {
1121         u32 rval;
1122
1123         if (!inte_mask)
1124                 return;
1125
1126         /* Clear pending Outbound Messaging interrupts */
1127         iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1128
1129         /* Disable Outbound Messaging interrupts */
1130         rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1131         rval &= ~inte_mask;
1132         iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch));
1133
1134         if (priv->flags & TSI721_USING_MSIX)
1135                 return; /* Finished if we are in MSI-X mode */
1136
1137         /*
1138          * For MSI and INTA interrupt signalling we need to disable next levels
1139          */
1140
1141         /* Disable Device Channel Interrupt */
1142         rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1143         rval &= ~TSI721_INT_OMSG_CHAN(ch);
1144         iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1145 }
1146
1147 /**
1148  * tsi721_add_outb_message - Add message to the Tsi721 outbound message queue
1149  * @mport: Master port with outbound message queue
1150  * @rdev: Target of outbound message
1151  * @mbox: Outbound mailbox
1152  * @buffer: Message to add to outbound queue
1153  * @len: Length of message
1154  */
1155 static int
1156 tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
1157                         void *buffer, size_t len)
1158 {
1159         struct tsi721_device *priv = mport->priv;
1160         struct tsi721_omsg_desc *desc;
1161         u32 tx_slot;
1162
1163         if (!priv->omsg_init[mbox] ||
1164             len > TSI721_MSG_MAX_SIZE || len < 8)
1165                 return -EINVAL;
1166
1167         tx_slot = priv->omsg_ring[mbox].tx_slot;
1168
1169         /* Copy copy message into transfer buffer */
1170         memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len);
1171
1172         if (len & 0x7)
1173                 len += 8;
1174
1175         /* Build descriptor associated with buffer */
1176         desc = priv->omsg_ring[mbox].omd_base;
1177         desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid);
1178         if (tx_slot % 4 == 0)
1179                 desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF);
1180
1181         desc[tx_slot].msg_info =
1182                 cpu_to_le32((mport->sys_size << 26) | (mbox << 22) |
1183                             (0xe << 12) | (len & 0xff8));
1184         desc[tx_slot].bufptr_lo =
1185                 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] &
1186                             0xffffffff);
1187         desc[tx_slot].bufptr_hi =
1188                 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32);
1189
1190         priv->omsg_ring[mbox].wr_count++;
1191
1192         /* Go to next descriptor */
1193         if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) {
1194                 priv->omsg_ring[mbox].tx_slot = 0;
1195                 /* Move through the ring link descriptor at the end */
1196                 priv->omsg_ring[mbox].wr_count++;
1197         }
1198
1199         mb();
1200
1201         /* Set new write count value */
1202         iowrite32(priv->omsg_ring[mbox].wr_count,
1203                 priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1204         ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1205
1206         return 0;
1207 }
1208
1209 /**
1210  * tsi721_omsg_handler - Outbound Message Interrupt Handler
1211  * @priv: pointer to tsi721 private data
1212  * @ch:   number of OB MSG channel to service
1213  *
1214  * Services channel interrupts from outbound messaging engine.
1215  */
1216 static void tsi721_omsg_handler(struct tsi721_device *priv, int ch)
1217 {
1218         u32 omsg_int;
1219
1220         spin_lock(&priv->omsg_ring[ch].lock);
1221
1222         omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch));
1223
1224         if (omsg_int & TSI721_OBDMAC_INT_ST_FULL)
1225                 dev_info(&priv->pdev->dev,
1226                         "OB MBOX%d: Status FIFO is full\n", ch);
1227
1228         if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) {
1229                 u32 srd_ptr;
1230                 u64 *sts_ptr, last_ptr = 0, prev_ptr = 0;
1231                 int i, j;
1232                 u32 tx_slot;
1233
1234                 /*
1235                  * Find last successfully processed descriptor
1236                  */
1237
1238                 /* Check and clear descriptor status FIFO entries */
1239                 srd_ptr = priv->omsg_ring[ch].sts_rdptr;
1240                 sts_ptr = priv->omsg_ring[ch].sts_base;
1241                 j = srd_ptr * 8;
1242                 while (sts_ptr[j]) {
1243                         for (i = 0; i < 8 && sts_ptr[j]; i++, j++) {
1244                                 prev_ptr = last_ptr;
1245                                 last_ptr = le64_to_cpu(sts_ptr[j]);
1246                                 sts_ptr[j] = 0;
1247                         }
1248
1249                         ++srd_ptr;
1250                         srd_ptr %= priv->omsg_ring[ch].sts_size;
1251                         j = srd_ptr * 8;
1252                 }
1253
1254                 if (last_ptr == 0)
1255                         goto no_sts_update;
1256
1257                 priv->omsg_ring[ch].sts_rdptr = srd_ptr;
1258                 iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch));
1259
1260                 if (!priv->mport->outb_msg[ch].mcback)
1261                         goto no_sts_update;
1262
1263                 /* Inform upper layer about transfer completion */
1264
1265                 tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/
1266                                                 sizeof(struct tsi721_omsg_desc);
1267
1268                 /*
1269                  * Check if this is a Link Descriptor (LD).
1270                  * If yes, ignore LD and use descriptor processed
1271                  * before LD.
1272                  */
1273                 if (tx_slot == priv->omsg_ring[ch].size) {
1274                         if (prev_ptr)
1275                                 tx_slot = (prev_ptr -
1276                                         (u64)priv->omsg_ring[ch].omd_phys)/
1277                                                 sizeof(struct tsi721_omsg_desc);
1278                         else
1279                                 goto no_sts_update;
1280                 }
1281
1282                 /* Move slot index to the next message to be sent */
1283                 ++tx_slot;
1284                 if (tx_slot == priv->omsg_ring[ch].size)
1285                         tx_slot = 0;
1286                 BUG_ON(tx_slot >= priv->omsg_ring[ch].size);
1287                 priv->mport->outb_msg[ch].mcback(priv->mport,
1288                                 priv->omsg_ring[ch].dev_id, ch,
1289                                 tx_slot);
1290         }
1291
1292 no_sts_update:
1293
1294         if (omsg_int & TSI721_OBDMAC_INT_ERROR) {
1295                 /*
1296                 * Outbound message operation aborted due to error,
1297                 * reinitialize OB MSG channel
1298                 */
1299
1300                 dev_dbg(&priv->pdev->dev, "OB MSG ABORT ch_stat=%x\n",
1301                         ioread32(priv->regs + TSI721_OBDMAC_STS(ch)));
1302
1303                 iowrite32(TSI721_OBDMAC_INT_ERROR,
1304                                 priv->regs + TSI721_OBDMAC_INT(ch));
1305                 iowrite32(TSI721_OBDMAC_CTL_INIT,
1306                                 priv->regs + TSI721_OBDMAC_CTL(ch));
1307                 ioread32(priv->regs + TSI721_OBDMAC_CTL(ch));
1308
1309                 /* Inform upper level to clear all pending tx slots */
1310                 if (priv->mport->outb_msg[ch].mcback)
1311                         priv->mport->outb_msg[ch].mcback(priv->mport,
1312                                         priv->omsg_ring[ch].dev_id, ch,
1313                                         priv->omsg_ring[ch].tx_slot);
1314                 /* Synch tx_slot tracking */
1315                 iowrite32(priv->omsg_ring[ch].tx_slot,
1316                         priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1317                 ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1318                 priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot;
1319                 priv->omsg_ring[ch].sts_rdptr = 0;
1320         }
1321
1322         /* Clear channel interrupts */
1323         iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch));
1324
1325         if (!(priv->flags & TSI721_USING_MSIX)) {
1326                 u32 ch_inte;
1327
1328                 /* Re-enable channel interrupts */
1329                 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1330                 ch_inte |= TSI721_INT_OMSG_CHAN(ch);
1331                 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1332         }
1333
1334         spin_unlock(&priv->omsg_ring[ch].lock);
1335 }
1336
1337 /**
1338  * tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox
1339  * @mport: Master port implementing Outbound Messaging Engine
1340  * @dev_id: Device specific pointer to pass on event
1341  * @mbox: Mailbox to open
1342  * @entries: Number of entries in the outbound mailbox ring
1343  */
1344 static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id,
1345                                  int mbox, int entries)
1346 {
1347         struct tsi721_device *priv = mport->priv;
1348         struct tsi721_omsg_desc *bd_ptr;
1349         int i, rc = 0;
1350
1351         if ((entries < TSI721_OMSGD_MIN_RING_SIZE) ||
1352             (entries > (TSI721_OMSGD_RING_SIZE)) ||
1353             (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1354                 rc = -EINVAL;
1355                 goto out;
1356         }
1357
1358         priv->omsg_ring[mbox].dev_id = dev_id;
1359         priv->omsg_ring[mbox].size = entries;
1360         priv->omsg_ring[mbox].sts_rdptr = 0;
1361         spin_lock_init(&priv->omsg_ring[mbox].lock);
1362
1363         /* Outbound Msg Buffer allocation based on
1364            the number of maximum descriptor entries */
1365         for (i = 0; i < entries; i++) {
1366                 priv->omsg_ring[mbox].omq_base[i] =
1367                         dma_alloc_coherent(
1368                                 &priv->pdev->dev, TSI721_MSG_BUFFER_SIZE,
1369                                 &priv->omsg_ring[mbox].omq_phys[i],
1370                                 GFP_KERNEL);
1371                 if (priv->omsg_ring[mbox].omq_base[i] == NULL) {
1372                         dev_dbg(&priv->pdev->dev,
1373                                 "Unable to allocate OB MSG data buffer for"
1374                                 " MBOX%d\n", mbox);
1375                         rc = -ENOMEM;
1376                         goto out_buf;
1377                 }
1378         }
1379
1380         /* Outbound message descriptor allocation */
1381         priv->omsg_ring[mbox].omd_base = dma_alloc_coherent(
1382                                 &priv->pdev->dev,
1383                                 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1384                                 &priv->omsg_ring[mbox].omd_phys, GFP_KERNEL);
1385         if (priv->omsg_ring[mbox].omd_base == NULL) {
1386                 dev_dbg(&priv->pdev->dev,
1387                         "Unable to allocate OB MSG descriptor memory "
1388                         "for MBOX%d\n", mbox);
1389                 rc = -ENOMEM;
1390                 goto out_buf;
1391         }
1392
1393         priv->omsg_ring[mbox].tx_slot = 0;
1394
1395         /* Outbound message descriptor status FIFO allocation */
1396         priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1);
1397         priv->omsg_ring[mbox].sts_base = dma_zalloc_coherent(&priv->pdev->dev,
1398                         priv->omsg_ring[mbox].sts_size *
1399                                                 sizeof(struct tsi721_dma_sts),
1400                         &priv->omsg_ring[mbox].sts_phys, GFP_KERNEL);
1401         if (priv->omsg_ring[mbox].sts_base == NULL) {
1402                 dev_dbg(&priv->pdev->dev,
1403                         "Unable to allocate OB MSG descriptor status FIFO "
1404                         "for MBOX%d\n", mbox);
1405                 rc = -ENOMEM;
1406                 goto out_desc;
1407         }
1408
1409         /*
1410          * Configure Outbound Messaging Engine
1411          */
1412
1413         /* Setup Outbound Message descriptor pointer */
1414         iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32),
1415                         priv->regs + TSI721_OBDMAC_DPTRH(mbox));
1416         iowrite32(((u64)priv->omsg_ring[mbox].omd_phys &
1417                                         TSI721_OBDMAC_DPTRL_MASK),
1418                         priv->regs + TSI721_OBDMAC_DPTRL(mbox));
1419
1420         /* Setup Outbound Message descriptor status FIFO */
1421         iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32),
1422                         priv->regs + TSI721_OBDMAC_DSBH(mbox));
1423         iowrite32(((u64)priv->omsg_ring[mbox].sts_phys &
1424                                         TSI721_OBDMAC_DSBL_MASK),
1425                         priv->regs + TSI721_OBDMAC_DSBL(mbox));
1426         iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size),
1427                 priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox));
1428
1429         /* Enable interrupts */
1430
1431 #ifdef CONFIG_PCI_MSI
1432         if (priv->flags & TSI721_USING_MSIX) {
1433                 /* Request interrupt service if we are in MSI-X mode */
1434                 rc = request_irq(
1435                         priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1436                         tsi721_omsg_msix, 0,
1437                         priv->msix[TSI721_VECT_OMB0_DONE + mbox].irq_name,
1438                         (void *)mport);
1439
1440                 if (rc) {
1441                         dev_dbg(&priv->pdev->dev,
1442                                 "Unable to allocate MSI-X interrupt for "
1443                                 "OBOX%d-DONE\n", mbox);
1444                         goto out_stat;
1445                 }
1446
1447                 rc = request_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
1448                         tsi721_omsg_msix, 0,
1449                         priv->msix[TSI721_VECT_OMB0_INT + mbox].irq_name,
1450                         (void *)mport);
1451
1452                 if (rc) {
1453                         dev_dbg(&priv->pdev->dev,
1454                                 "Unable to allocate MSI-X interrupt for "
1455                                 "MBOX%d-INT\n", mbox);
1456                         free_irq(
1457                                 priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1458                                 (void *)mport);
1459                         goto out_stat;
1460                 }
1461         }
1462 #endif /* CONFIG_PCI_MSI */
1463
1464         tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL);
1465
1466         /* Initialize Outbound Message descriptors ring */
1467         bd_ptr = priv->omsg_ring[mbox].omd_base;
1468         bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29);
1469         bd_ptr[entries].msg_info = 0;
1470         bd_ptr[entries].next_lo =
1471                 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys &
1472                 TSI721_OBDMAC_DPTRL_MASK);
1473         bd_ptr[entries].next_hi =
1474                 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32);
1475         priv->omsg_ring[mbox].wr_count = 0;
1476         mb();
1477
1478         /* Initialize Outbound Message engine */
1479         iowrite32(TSI721_OBDMAC_CTL_INIT, priv->regs + TSI721_OBDMAC_CTL(mbox));
1480         ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1481         udelay(10);
1482
1483         priv->omsg_init[mbox] = 1;
1484
1485         return 0;
1486
1487 #ifdef CONFIG_PCI_MSI
1488 out_stat:
1489         dma_free_coherent(&priv->pdev->dev,
1490                 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1491                 priv->omsg_ring[mbox].sts_base,
1492                 priv->omsg_ring[mbox].sts_phys);
1493
1494         priv->omsg_ring[mbox].sts_base = NULL;
1495 #endif /* CONFIG_PCI_MSI */
1496
1497 out_desc:
1498         dma_free_coherent(&priv->pdev->dev,
1499                 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1500                 priv->omsg_ring[mbox].omd_base,
1501                 priv->omsg_ring[mbox].omd_phys);
1502
1503         priv->omsg_ring[mbox].omd_base = NULL;
1504
1505 out_buf:
1506         for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
1507                 if (priv->omsg_ring[mbox].omq_base[i]) {
1508                         dma_free_coherent(&priv->pdev->dev,
1509                                 TSI721_MSG_BUFFER_SIZE,
1510                                 priv->omsg_ring[mbox].omq_base[i],
1511                                 priv->omsg_ring[mbox].omq_phys[i]);
1512
1513                         priv->omsg_ring[mbox].omq_base[i] = NULL;
1514                 }
1515         }
1516
1517 out:
1518         return rc;
1519 }
1520
1521 /**
1522  * tsi721_close_outb_mbox - Close Tsi721 outbound mailbox
1523  * @mport: Master port implementing the outbound message unit
1524  * @mbox: Mailbox to close
1525  */
1526 static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox)
1527 {
1528         struct tsi721_device *priv = mport->priv;
1529         u32 i;
1530
1531         if (!priv->omsg_init[mbox])
1532                 return;
1533         priv->omsg_init[mbox] = 0;
1534
1535         /* Disable Interrupts */
1536
1537         tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL);
1538
1539 #ifdef CONFIG_PCI_MSI
1540         if (priv->flags & TSI721_USING_MSIX) {
1541                 free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1542                          (void *)mport);
1543                 free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
1544                          (void *)mport);
1545         }
1546 #endif /* CONFIG_PCI_MSI */
1547
1548         /* Free OMSG Descriptor Status FIFO */
1549         dma_free_coherent(&priv->pdev->dev,
1550                 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1551                 priv->omsg_ring[mbox].sts_base,
1552                 priv->omsg_ring[mbox].sts_phys);
1553
1554         priv->omsg_ring[mbox].sts_base = NULL;
1555
1556         /* Free OMSG descriptors */
1557         dma_free_coherent(&priv->pdev->dev,
1558                 (priv->omsg_ring[mbox].size + 1) *
1559                         sizeof(struct tsi721_omsg_desc),
1560                 priv->omsg_ring[mbox].omd_base,
1561                 priv->omsg_ring[mbox].omd_phys);
1562
1563         priv->omsg_ring[mbox].omd_base = NULL;
1564
1565         /* Free message buffers */
1566         for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
1567                 if (priv->omsg_ring[mbox].omq_base[i]) {
1568                         dma_free_coherent(&priv->pdev->dev,
1569                                 TSI721_MSG_BUFFER_SIZE,
1570                                 priv->omsg_ring[mbox].omq_base[i],
1571                                 priv->omsg_ring[mbox].omq_phys[i]);
1572
1573                         priv->omsg_ring[mbox].omq_base[i] = NULL;
1574                 }
1575         }
1576 }
1577
1578 /**
1579  * tsi721_imsg_handler - Inbound Message Interrupt Handler
1580  * @priv: pointer to tsi721 private data
1581  * @ch: inbound message channel number to service
1582  *
1583  * Services channel interrupts from inbound messaging engine.
1584  */
1585 static void tsi721_imsg_handler(struct tsi721_device *priv, int ch)
1586 {
1587         u32 mbox = ch - 4;
1588         u32 imsg_int;
1589
1590         spin_lock(&priv->imsg_ring[mbox].lock);
1591
1592         imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch));
1593
1594         if (imsg_int & TSI721_IBDMAC_INT_SRTO)
1595                 dev_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout\n",
1596                         mbox);
1597
1598         if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR)
1599                 dev_info(&priv->pdev->dev, "IB MBOX%d PCIe error\n",
1600                         mbox);
1601
1602         if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW)
1603                 dev_info(&priv->pdev->dev,
1604                         "IB MBOX%d IB free queue low\n", mbox);
1605
1606         /* Clear IB channel interrupts */
1607         iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch));
1608
1609         /* If an IB Msg is received notify the upper layer */
1610         if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV &&
1611                 priv->mport->inb_msg[mbox].mcback)
1612                 priv->mport->inb_msg[mbox].mcback(priv->mport,
1613                                 priv->imsg_ring[mbox].dev_id, mbox, -1);
1614
1615         if (!(priv->flags & TSI721_USING_MSIX)) {
1616                 u32 ch_inte;
1617
1618                 /* Re-enable channel interrupts */
1619                 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1620                 ch_inte |= TSI721_INT_IMSG_CHAN(ch);
1621                 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1622         }
1623
1624         spin_unlock(&priv->imsg_ring[mbox].lock);
1625 }
1626
1627 /**
1628  * tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox
1629  * @mport: Master port implementing the Inbound Messaging Engine
1630  * @dev_id: Device specific pointer to pass on event
1631  * @mbox: Mailbox to open
1632  * @entries: Number of entries in the inbound mailbox ring
1633  */
1634 static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id,
1635                                 int mbox, int entries)
1636 {
1637         struct tsi721_device *priv = mport->priv;
1638         int ch = mbox + 4;
1639         int i;
1640         u64 *free_ptr;
1641         int rc = 0;
1642
1643         if ((entries < TSI721_IMSGD_MIN_RING_SIZE) ||
1644             (entries > TSI721_IMSGD_RING_SIZE) ||
1645             (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1646                 rc = -EINVAL;
1647                 goto out;
1648         }
1649
1650         /* Initialize IB Messaging Ring */
1651         priv->imsg_ring[mbox].dev_id = dev_id;
1652         priv->imsg_ring[mbox].size = entries;
1653         priv->imsg_ring[mbox].rx_slot = 0;
1654         priv->imsg_ring[mbox].desc_rdptr = 0;
1655         priv->imsg_ring[mbox].fq_wrptr = 0;
1656         for (i = 0; i < priv->imsg_ring[mbox].size; i++)
1657                 priv->imsg_ring[mbox].imq_base[i] = NULL;
1658         spin_lock_init(&priv->imsg_ring[mbox].lock);
1659
1660         /* Allocate buffers for incoming messages */
1661         priv->imsg_ring[mbox].buf_base =
1662                 dma_alloc_coherent(&priv->pdev->dev,
1663                                    entries * TSI721_MSG_BUFFER_SIZE,
1664                                    &priv->imsg_ring[mbox].buf_phys,
1665                                    GFP_KERNEL);
1666
1667         if (priv->imsg_ring[mbox].buf_base == NULL) {
1668                 dev_err(&priv->pdev->dev,
1669                         "Failed to allocate buffers for IB MBOX%d\n", mbox);
1670                 rc = -ENOMEM;
1671                 goto out;
1672         }
1673
1674         /* Allocate memory for circular free list */
1675         priv->imsg_ring[mbox].imfq_base =
1676                 dma_alloc_coherent(&priv->pdev->dev,
1677                                    entries * 8,
1678                                    &priv->imsg_ring[mbox].imfq_phys,
1679                                    GFP_KERNEL);
1680
1681         if (priv->imsg_ring[mbox].imfq_base == NULL) {
1682                 dev_err(&priv->pdev->dev,
1683                         "Failed to allocate free queue for IB MBOX%d\n", mbox);
1684                 rc = -ENOMEM;
1685                 goto out_buf;
1686         }
1687
1688         /* Allocate memory for Inbound message descriptors */
1689         priv->imsg_ring[mbox].imd_base =
1690                 dma_alloc_coherent(&priv->pdev->dev,
1691                                    entries * sizeof(struct tsi721_imsg_desc),
1692                                    &priv->imsg_ring[mbox].imd_phys, GFP_KERNEL);
1693
1694         if (priv->imsg_ring[mbox].imd_base == NULL) {
1695                 dev_err(&priv->pdev->dev,
1696                         "Failed to allocate descriptor memory for IB MBOX%d\n",
1697                         mbox);
1698                 rc = -ENOMEM;
1699                 goto out_dma;
1700         }
1701
1702         /* Fill free buffer pointer list */
1703         free_ptr = priv->imsg_ring[mbox].imfq_base;
1704         for (i = 0; i < entries; i++)
1705                 free_ptr[i] = cpu_to_le64(
1706                                 (u64)(priv->imsg_ring[mbox].buf_phys) +
1707                                 i * 0x1000);
1708
1709         mb();
1710
1711         /*
1712          * For mapping of inbound SRIO Messages into appropriate queues we need
1713          * to set Inbound Device ID register in the messaging engine. We do it
1714          * once when first inbound mailbox is requested.
1715          */
1716         if (!(priv->flags & TSI721_IMSGID_SET)) {
1717                 iowrite32((u32)priv->mport->host_deviceid,
1718                         priv->regs + TSI721_IB_DEVID);
1719                 priv->flags |= TSI721_IMSGID_SET;
1720         }
1721
1722         /*
1723          * Configure Inbound Messaging channel (ch = mbox + 4)
1724          */
1725
1726         /* Setup Inbound Message free queue */
1727         iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32),
1728                 priv->regs + TSI721_IBDMAC_FQBH(ch));
1729         iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys &
1730                         TSI721_IBDMAC_FQBL_MASK),
1731                 priv->regs+TSI721_IBDMAC_FQBL(ch));
1732         iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
1733                 priv->regs + TSI721_IBDMAC_FQSZ(ch));
1734
1735         /* Setup Inbound Message descriptor queue */
1736         iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32),
1737                 priv->regs + TSI721_IBDMAC_DQBH(ch));
1738         iowrite32(((u32)priv->imsg_ring[mbox].imd_phys &
1739                    (u32)TSI721_IBDMAC_DQBL_MASK),
1740                 priv->regs+TSI721_IBDMAC_DQBL(ch));
1741         iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
1742                 priv->regs + TSI721_IBDMAC_DQSZ(ch));
1743
1744         /* Enable interrupts */
1745
1746 #ifdef CONFIG_PCI_MSI
1747         if (priv->flags & TSI721_USING_MSIX) {
1748                 /* Request interrupt service if we are in MSI-X mode */
1749                 rc = request_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1750                         tsi721_imsg_msix, 0,
1751                         priv->msix[TSI721_VECT_IMB0_RCV + mbox].irq_name,
1752                         (void *)mport);
1753
1754                 if (rc) {
1755                         dev_dbg(&priv->pdev->dev,
1756                                 "Unable to allocate MSI-X interrupt for "
1757                                 "IBOX%d-DONE\n", mbox);
1758                         goto out_desc;
1759                 }
1760
1761                 rc = request_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
1762                         tsi721_imsg_msix, 0,
1763                         priv->msix[TSI721_VECT_IMB0_INT + mbox].irq_name,
1764                         (void *)mport);
1765
1766                 if (rc) {
1767                         dev_dbg(&priv->pdev->dev,
1768                                 "Unable to allocate MSI-X interrupt for "
1769                                 "IBOX%d-INT\n", mbox);
1770                         free_irq(
1771                                 priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1772                                 (void *)mport);
1773                         goto out_desc;
1774                 }
1775         }
1776 #endif /* CONFIG_PCI_MSI */
1777
1778         tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL);
1779
1780         /* Initialize Inbound Message Engine */
1781         iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch));
1782         ioread32(priv->regs + TSI721_IBDMAC_CTL(ch));
1783         udelay(10);
1784         priv->imsg_ring[mbox].fq_wrptr = entries - 1;
1785         iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch));
1786
1787         priv->imsg_init[mbox] = 1;
1788         return 0;
1789
1790 #ifdef CONFIG_PCI_MSI
1791 out_desc:
1792         dma_free_coherent(&priv->pdev->dev,
1793                 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
1794                 priv->imsg_ring[mbox].imd_base,
1795                 priv->imsg_ring[mbox].imd_phys);
1796
1797         priv->imsg_ring[mbox].imd_base = NULL;
1798 #endif /* CONFIG_PCI_MSI */
1799
1800 out_dma:
1801         dma_free_coherent(&priv->pdev->dev,
1802                 priv->imsg_ring[mbox].size * 8,
1803                 priv->imsg_ring[mbox].imfq_base,
1804                 priv->imsg_ring[mbox].imfq_phys);
1805
1806         priv->imsg_ring[mbox].imfq_base = NULL;
1807
1808 out_buf:
1809         dma_free_coherent(&priv->pdev->dev,
1810                 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
1811                 priv->imsg_ring[mbox].buf_base,
1812                 priv->imsg_ring[mbox].buf_phys);
1813
1814         priv->imsg_ring[mbox].buf_base = NULL;
1815
1816 out:
1817         return rc;
1818 }
1819
1820 /**
1821  * tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox
1822  * @mport: Master port implementing the Inbound Messaging Engine
1823  * @mbox: Mailbox to close
1824  */
1825 static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox)
1826 {
1827         struct tsi721_device *priv = mport->priv;
1828         u32 rx_slot;
1829         int ch = mbox + 4;
1830
1831         if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */
1832                 return;
1833         priv->imsg_init[mbox] = 0;
1834
1835         /* Disable Inbound Messaging Engine */
1836
1837         /* Disable Interrupts */
1838         tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK);
1839
1840 #ifdef CONFIG_PCI_MSI
1841         if (priv->flags & TSI721_USING_MSIX) {
1842                 free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1843                                 (void *)mport);
1844                 free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
1845                                 (void *)mport);
1846         }
1847 #endif /* CONFIG_PCI_MSI */
1848
1849         /* Clear Inbound Buffer Queue */
1850         for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++)
1851                 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
1852
1853         /* Free memory allocated for message buffers */
1854         dma_free_coherent(&priv->pdev->dev,
1855                 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
1856                 priv->imsg_ring[mbox].buf_base,
1857                 priv->imsg_ring[mbox].buf_phys);
1858
1859         priv->imsg_ring[mbox].buf_base = NULL;
1860
1861         /* Free memory allocated for free pointr list */
1862         dma_free_coherent(&priv->pdev->dev,
1863                 priv->imsg_ring[mbox].size * 8,
1864                 priv->imsg_ring[mbox].imfq_base,
1865                 priv->imsg_ring[mbox].imfq_phys);
1866
1867         priv->imsg_ring[mbox].imfq_base = NULL;
1868
1869         /* Free memory allocated for RX descriptors */
1870         dma_free_coherent(&priv->pdev->dev,
1871                 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
1872                 priv->imsg_ring[mbox].imd_base,
1873                 priv->imsg_ring[mbox].imd_phys);
1874
1875         priv->imsg_ring[mbox].imd_base = NULL;
1876 }
1877
1878 /**
1879  * tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue
1880  * @mport: Master port implementing the Inbound Messaging Engine
1881  * @mbox: Inbound mailbox number
1882  * @buf: Buffer to add to inbound queue
1883  */
1884 static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
1885 {
1886         struct tsi721_device *priv = mport->priv;
1887         u32 rx_slot;
1888         int rc = 0;
1889
1890         rx_slot = priv->imsg_ring[mbox].rx_slot;
1891         if (priv->imsg_ring[mbox].imq_base[rx_slot]) {
1892                 dev_err(&priv->pdev->dev,
1893                         "Error adding inbound buffer %d, buffer exists\n",
1894                         rx_slot);
1895                 rc = -EINVAL;
1896                 goto out;
1897         }
1898
1899         priv->imsg_ring[mbox].imq_base[rx_slot] = buf;
1900
1901         if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size)
1902                 priv->imsg_ring[mbox].rx_slot = 0;
1903
1904 out:
1905         return rc;
1906 }
1907
1908 /**
1909  * tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue
1910  * @mport: Master port implementing the Inbound Messaging Engine
1911  * @mbox: Inbound mailbox number
1912  *
1913  * Returns pointer to the message on success or NULL on failure.
1914  */
1915 static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox)
1916 {
1917         struct tsi721_device *priv = mport->priv;
1918         struct tsi721_imsg_desc *desc;
1919         u32 rx_slot;
1920         void *rx_virt = NULL;
1921         u64 rx_phys;
1922         void *buf = NULL;
1923         u64 *free_ptr;
1924         int ch = mbox + 4;
1925         int msg_size;
1926
1927         if (!priv->imsg_init[mbox])
1928                 return NULL;
1929
1930         desc = priv->imsg_ring[mbox].imd_base;
1931         desc += priv->imsg_ring[mbox].desc_rdptr;
1932
1933         if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO))
1934                 goto out;
1935
1936         rx_slot = priv->imsg_ring[mbox].rx_slot;
1937         while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) {
1938                 if (++rx_slot == priv->imsg_ring[mbox].size)
1939                         rx_slot = 0;
1940         }
1941
1942         rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) |
1943                         le32_to_cpu(desc->bufptr_lo);
1944
1945         rx_virt = priv->imsg_ring[mbox].buf_base +
1946                   (rx_phys - (u64)priv->imsg_ring[mbox].buf_phys);
1947
1948         buf = priv->imsg_ring[mbox].imq_base[rx_slot];
1949         msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT;
1950         if (msg_size == 0)
1951                 msg_size = RIO_MAX_MSG_SIZE;
1952
1953         memcpy(buf, rx_virt, msg_size);
1954         priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
1955
1956         desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO);
1957         if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size)
1958                 priv->imsg_ring[mbox].desc_rdptr = 0;
1959
1960         iowrite32(priv->imsg_ring[mbox].desc_rdptr,
1961                 priv->regs + TSI721_IBDMAC_DQRP(ch));
1962
1963         /* Return free buffer into the pointer list */
1964         free_ptr = priv->imsg_ring[mbox].imfq_base;
1965         free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys);
1966
1967         if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size)
1968                 priv->imsg_ring[mbox].fq_wrptr = 0;
1969
1970         iowrite32(priv->imsg_ring[mbox].fq_wrptr,
1971                 priv->regs + TSI721_IBDMAC_FQWP(ch));
1972 out:
1973         return buf;
1974 }
1975
1976 /**
1977  * tsi721_messages_init - Initialization of Messaging Engine
1978  * @priv: pointer to tsi721 private data
1979  *
1980  * Configures Tsi721 messaging engine.
1981  */
1982 static int tsi721_messages_init(struct tsi721_device *priv)
1983 {
1984         int     ch;
1985
1986         iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG);
1987         iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT);
1988         iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT);
1989
1990         /* Set SRIO Message Request/Response Timeout */
1991         iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO);
1992
1993         /* Initialize Inbound Messaging Engine Registers */
1994         for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) {
1995                 /* Clear interrupt bits */
1996                 iowrite32(TSI721_IBDMAC_INT_MASK,
1997                         priv->regs + TSI721_IBDMAC_INT(ch));
1998                 /* Clear Status */
1999                 iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch));
2000
2001                 iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK,
2002                                 priv->regs + TSI721_SMSG_ECC_COR_LOG(ch));
2003                 iowrite32(TSI721_SMSG_ECC_NCOR_MASK,
2004                                 priv->regs + TSI721_SMSG_ECC_NCOR(ch));
2005         }
2006
2007         return 0;
2008 }
2009
2010 /**
2011  * tsi721_disable_ints - disables all device interrupts
2012  * @priv: pointer to tsi721 private data
2013  */
2014 static void tsi721_disable_ints(struct tsi721_device *priv)
2015 {
2016         int ch;
2017
2018         /* Disable all device level interrupts */
2019         iowrite32(0, priv->regs + TSI721_DEV_INTE);
2020
2021         /* Disable all Device Channel interrupts */
2022         iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE);
2023
2024         /* Disable all Inbound Msg Channel interrupts */
2025         for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++)
2026                 iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch));
2027
2028         /* Disable all Outbound Msg Channel interrupts */
2029         for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++)
2030                 iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch));
2031
2032         /* Disable all general messaging interrupts */
2033         iowrite32(0, priv->regs + TSI721_SMSG_INTE);
2034
2035         /* Disable all BDMA Channel interrupts */
2036         for (ch = 0; ch < TSI721_DMA_MAXCH; ch++)
2037                 iowrite32(0, priv->regs + TSI721_DMAC_INTE(ch));
2038
2039         /* Disable all general BDMA interrupts */
2040         iowrite32(0, priv->regs + TSI721_BDMA_INTE);
2041
2042         /* Disable all SRIO Channel interrupts */
2043         for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++)
2044                 iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch));
2045
2046         /* Disable all general SR2PC interrupts */
2047         iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE);
2048
2049         /* Disable all PC2SR interrupts */
2050         iowrite32(0, priv->regs + TSI721_PC2SR_INTE);
2051
2052         /* Disable all I2C interrupts */
2053         iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE);
2054
2055         /* Disable SRIO MAC interrupts */
2056         iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE);
2057         iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN);
2058 }
2059
2060 /**
2061  * tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port
2062  * @priv: pointer to tsi721 private data
2063  *
2064  * Configures Tsi721 as RapidIO master port.
2065  */
2066 static int __devinit tsi721_setup_mport(struct tsi721_device *priv)
2067 {
2068         struct pci_dev *pdev = priv->pdev;
2069         int err = 0;
2070         struct rio_ops *ops;
2071
2072         struct rio_mport *mport;
2073
2074         ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL);
2075         if (!ops) {
2076                 dev_dbg(&pdev->dev, "Unable to allocate memory for rio_ops\n");
2077                 return -ENOMEM;
2078         }
2079
2080         ops->lcread = tsi721_lcread;
2081         ops->lcwrite = tsi721_lcwrite;
2082         ops->cread = tsi721_cread_dma;
2083         ops->cwrite = tsi721_cwrite_dma;
2084         ops->dsend = tsi721_dsend;
2085         ops->open_inb_mbox = tsi721_open_inb_mbox;
2086         ops->close_inb_mbox = tsi721_close_inb_mbox;
2087         ops->open_outb_mbox = tsi721_open_outb_mbox;
2088         ops->close_outb_mbox = tsi721_close_outb_mbox;
2089         ops->add_outb_message = tsi721_add_outb_message;
2090         ops->add_inb_buffer = tsi721_add_inb_buffer;
2091         ops->get_inb_message = tsi721_get_inb_message;
2092
2093         mport = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
2094         if (!mport) {
2095                 kfree(ops);
2096                 dev_dbg(&pdev->dev, "Unable to allocate memory for mport\n");
2097                 return -ENOMEM;
2098         }
2099
2100         mport->ops = ops;
2101         mport->index = 0;
2102         mport->sys_size = 0; /* small system */
2103         mport->phy_type = RIO_PHY_SERIAL;
2104         mport->priv = (void *)priv;
2105         mport->phys_efptr = 0x100;
2106
2107         INIT_LIST_HEAD(&mport->dbells);
2108
2109         rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
2110         rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3);
2111         rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3);
2112         strcpy(mport->name, "Tsi721 mport");
2113
2114         /* Hook up interrupt handler */
2115
2116 #ifdef CONFIG_PCI_MSI
2117         if (!tsi721_enable_msix(priv))
2118                 priv->flags |= TSI721_USING_MSIX;
2119         else if (!pci_enable_msi(pdev))
2120                 priv->flags |= TSI721_USING_MSI;
2121         else
2122                 dev_info(&pdev->dev,
2123                          "MSI/MSI-X is not available. Using legacy INTx.\n");
2124 #endif /* CONFIG_PCI_MSI */
2125
2126         err = tsi721_request_irq(mport);
2127
2128         if (!err) {
2129                 tsi721_interrupts_init(priv);
2130                 ops->pwenable = tsi721_pw_enable;
2131         } else
2132                 dev_err(&pdev->dev, "Unable to get assigned PCI IRQ "
2133                         "vector %02X err=0x%x\n", pdev->irq, err);
2134
2135         /* Enable SRIO link */
2136         iowrite32(ioread32(priv->regs + TSI721_DEVCTL) |
2137                   TSI721_DEVCTL_SRBOOT_CMPL,
2138                   priv->regs + TSI721_DEVCTL);
2139
2140         rio_register_mport(mport);
2141         priv->mport = mport;
2142
2143         if (mport->host_deviceid >= 0)
2144                 iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER |
2145                           RIO_PORT_GEN_DISCOVERED,
2146                           priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2147         else
2148                 iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2149
2150         return 0;
2151 }
2152
2153 static int __devinit tsi721_probe(struct pci_dev *pdev,
2154                                   const struct pci_device_id *id)
2155 {
2156         struct tsi721_device *priv;
2157         int i;
2158         int err;
2159         u32 regval;
2160
2161         priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL);
2162         if (priv == NULL) {
2163                 dev_err(&pdev->dev, "Failed to allocate memory for device\n");
2164                 err = -ENOMEM;
2165                 goto err_exit;
2166         }
2167
2168         err = pci_enable_device(pdev);
2169         if (err) {
2170                 dev_err(&pdev->dev, "Failed to enable PCI device\n");
2171                 goto err_clean;
2172         }
2173
2174         priv->pdev = pdev;
2175
2176 #ifdef DEBUG
2177         for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
2178                 dev_dbg(&pdev->dev, "res[%d] @ 0x%llx (0x%lx, 0x%lx)\n",
2179                         i, (unsigned long long)pci_resource_start(pdev, i),
2180                         (unsigned long)pci_resource_len(pdev, i),
2181                         pci_resource_flags(pdev, i));
2182         }
2183 #endif
2184         /*
2185          * Verify BAR configuration
2186          */
2187
2188         /* BAR_0 (registers) must be 512KB+ in 32-bit address space */
2189         if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) ||
2190             pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 ||
2191             pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) {
2192                 dev_err(&pdev->dev,
2193                         "Missing or misconfigured CSR BAR0, aborting.\n");
2194                 err = -ENODEV;
2195                 goto err_disable_pdev;
2196         }
2197
2198         /* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */
2199         if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) ||
2200             pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 ||
2201             pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) {
2202                 dev_err(&pdev->dev,
2203                         "Missing or misconfigured Doorbell BAR1, aborting.\n");
2204                 err = -ENODEV;
2205                 goto err_disable_pdev;
2206         }
2207
2208         /*
2209          * BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address
2210          * space.
2211          * NOTE: BAR_2 and BAR_4 are not used by this version of driver.
2212          * It may be a good idea to keep them disabled using HW configuration
2213          * to save PCI memory space.
2214          */
2215         if ((pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM) &&
2216             (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64)) {
2217                 dev_info(&pdev->dev, "Outbound BAR2 is not used but enabled.\n");
2218         }
2219
2220         if ((pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM) &&
2221             (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64)) {
2222                 dev_info(&pdev->dev, "Outbound BAR4 is not used but enabled.\n");
2223         }
2224
2225         err = pci_request_regions(pdev, DRV_NAME);
2226         if (err) {
2227                 dev_err(&pdev->dev, "Cannot obtain PCI resources, "
2228                         "aborting.\n");
2229                 goto err_disable_pdev;
2230         }
2231
2232         pci_set_master(pdev);
2233
2234         priv->regs = pci_ioremap_bar(pdev, BAR_0);
2235         if (!priv->regs) {
2236                 dev_err(&pdev->dev,
2237                         "Unable to map device registers space, aborting\n");
2238                 err = -ENOMEM;
2239                 goto err_free_res;
2240         }
2241
2242         priv->odb_base = pci_ioremap_bar(pdev, BAR_1);
2243         if (!priv->odb_base) {
2244                 dev_err(&pdev->dev,
2245                         "Unable to map outbound doorbells space, aborting\n");
2246                 err = -ENOMEM;
2247                 goto err_unmap_bars;
2248         }
2249
2250         /* Configure DMA attributes. */
2251         if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
2252                 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
2253                         dev_info(&pdev->dev, "Unable to set DMA mask\n");
2254                         goto err_unmap_bars;
2255                 }
2256
2257                 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2258                         dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
2259         } else {
2260                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2261                 if (err)
2262                         dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
2263         }
2264
2265         /* Clear "no snoop" and "relaxed ordering" bits. */
2266         pci_read_config_dword(pdev, 0x40 + PCI_EXP_DEVCTL, &regval);
2267         regval &= ~(PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN);
2268         pci_write_config_dword(pdev, 0x40 + PCI_EXP_DEVCTL, regval);
2269
2270         /*
2271          * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block
2272          */
2273         pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01);
2274         pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL,
2275                                                 TSI721_MSIXTBL_OFFSET);
2276         pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA,
2277                                                 TSI721_MSIXPBA_OFFSET);
2278         pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0);
2279         /* End of FIXUP */
2280
2281         tsi721_disable_ints(priv);
2282
2283         tsi721_init_pc2sr_mapping(priv);
2284         tsi721_init_sr2pc_mapping(priv);
2285
2286         if (tsi721_bdma_init(priv)) {
2287                 dev_err(&pdev->dev, "BDMA initialization failed, aborting\n");
2288                 err = -ENOMEM;
2289                 goto err_unmap_bars;
2290         }
2291
2292         err = tsi721_doorbell_init(priv);
2293         if (err)
2294                 goto err_free_bdma;
2295
2296         tsi721_port_write_init(priv);
2297
2298         err = tsi721_messages_init(priv);
2299         if (err)
2300                 goto err_free_consistent;
2301
2302         err = tsi721_setup_mport(priv);
2303         if (err)
2304                 goto err_free_consistent;
2305
2306         return 0;
2307
2308 err_free_consistent:
2309         tsi721_doorbell_free(priv);
2310 err_free_bdma:
2311         tsi721_bdma_free(priv);
2312 err_unmap_bars:
2313         if (priv->regs)
2314                 iounmap(priv->regs);
2315         if (priv->odb_base)
2316                 iounmap(priv->odb_base);
2317 err_free_res:
2318         pci_release_regions(pdev);
2319         pci_clear_master(pdev);
2320 err_disable_pdev:
2321         pci_disable_device(pdev);
2322 err_clean:
2323         kfree(priv);
2324 err_exit:
2325         return err;
2326 }
2327
2328 static DEFINE_PCI_DEVICE_TABLE(tsi721_pci_tbl) = {
2329         { PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) },
2330         { 0, }  /* terminate list */
2331 };
2332
2333 MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl);
2334
2335 static struct pci_driver tsi721_driver = {
2336         .name           = "tsi721",
2337         .id_table       = tsi721_pci_tbl,
2338         .probe          = tsi721_probe,
2339 };
2340
2341 static int __init tsi721_init(void)
2342 {
2343         return pci_register_driver(&tsi721_driver);
2344 }
2345
2346 static void __exit tsi721_exit(void)
2347 {
2348         pci_unregister_driver(&tsi721_driver);
2349 }
2350
2351 device_initcall(tsi721_init);