Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 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 | |
Alexandre Bounine | b24823e | 2012-03-05 14:59:21 -0800 | [diff] [blame] | 413 | wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE; |
| 414 | rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE; |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 415 | |
| 416 | while (wr_ptr != rd_ptr) { |
| 417 | idb_entry = (u64 *)(priv->idb_base + |
| 418 | (TSI721_IDB_ENTRY_SIZE * rd_ptr)); |
| 419 | rd_ptr++; |
Alexandre Bounine | b24823e | 2012-03-05 14:59:21 -0800 | [diff] [blame] | 420 | rd_ptr %= IDB_QSIZE; |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 421 | idb.msg = *idb_entry; |
| 422 | *idb_entry = 0; |
| 423 | |
| 424 | /* Process one doorbell */ |
| 425 | list_for_each_entry(dbell, &mport->dbells, node) { |
| 426 | if ((dbell->res->start <= DBELL_INF(idb.bytes)) && |
| 427 | (dbell->res->end >= DBELL_INF(idb.bytes))) { |
| 428 | found = 1; |
| 429 | break; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | if (found) { |
| 434 | dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes), |
| 435 | DBELL_TID(idb.bytes), DBELL_INF(idb.bytes)); |
| 436 | } else { |
| 437 | dev_dbg(&priv->pdev->dev, |
| 438 | "spurious inb doorbell, sid %2.2x tid %2.2x" |
| 439 | " info %4.4x\n", DBELL_SID(idb.bytes), |
| 440 | DBELL_TID(idb.bytes), DBELL_INF(idb.bytes)); |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | iowrite32(rd_ptr & (IDB_QSIZE - 1), |
| 445 | priv->regs + TSI721_IDQ_RP(IDB_QUEUE)); |
| 446 | |
| 447 | /* Re-enable IDB interrupts */ |
| 448 | regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); |
| 449 | regval |= TSI721_SR_CHINT_IDBQRCV; |
| 450 | iowrite32(regval, |
| 451 | priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); |
| 452 | } |
| 453 | |
| 454 | /** |
| 455 | * tsi721_irqhandler - Tsi721 interrupt handler |
| 456 | * @irq: Linux interrupt number |
| 457 | * @ptr: Pointer to interrupt-specific data (mport structure) |
| 458 | * |
| 459 | * Handles Tsi721 interrupts signaled using MSI and INTA. Checks reported |
| 460 | * interrupt events and calls an event-specific handler(s). |
| 461 | */ |
| 462 | static irqreturn_t tsi721_irqhandler(int irq, void *ptr) |
| 463 | { |
| 464 | struct rio_mport *mport = (struct rio_mport *)ptr; |
| 465 | struct tsi721_device *priv = mport->priv; |
| 466 | u32 dev_int; |
| 467 | u32 dev_ch_int; |
| 468 | u32 intval; |
| 469 | u32 ch_inte; |
| 470 | |
| 471 | dev_int = ioread32(priv->regs + TSI721_DEV_INT); |
| 472 | if (!dev_int) |
| 473 | return IRQ_NONE; |
| 474 | |
| 475 | dev_ch_int = ioread32(priv->regs + TSI721_DEV_CHAN_INT); |
| 476 | |
| 477 | if (dev_int & TSI721_DEV_INT_SR2PC_CH) { |
| 478 | /* Service SR2PC Channel interrupts */ |
| 479 | if (dev_ch_int & TSI721_INT_SR2PC_CHAN(IDB_QUEUE)) { |
| 480 | /* Service Inbound Doorbell interrupt */ |
| 481 | intval = ioread32(priv->regs + |
| 482 | TSI721_SR_CHINT(IDB_QUEUE)); |
| 483 | if (intval & TSI721_SR_CHINT_IDBQRCV) |
| 484 | tsi721_dbell_handler(mport); |
| 485 | else |
| 486 | dev_info(&priv->pdev->dev, |
| 487 | "Unsupported SR_CH_INT %x\n", intval); |
| 488 | |
| 489 | /* Clear interrupts */ |
| 490 | iowrite32(intval, |
| 491 | priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); |
| 492 | ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | if (dev_int & TSI721_DEV_INT_SMSG_CH) { |
| 497 | int ch; |
| 498 | |
| 499 | /* |
| 500 | * Service channel interrupts from Messaging Engine |
| 501 | */ |
| 502 | |
| 503 | if (dev_ch_int & TSI721_INT_IMSG_CHAN_M) { /* Inbound Msg */ |
| 504 | /* Disable signaled OB MSG Channel interrupts */ |
| 505 | ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 506 | ch_inte &= ~(dev_ch_int & TSI721_INT_IMSG_CHAN_M); |
| 507 | iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); |
| 508 | |
| 509 | /* |
| 510 | * Process Inbound Message interrupt for each MBOX |
| 511 | */ |
| 512 | for (ch = 4; ch < RIO_MAX_MBOX + 4; ch++) { |
| 513 | if (!(dev_ch_int & TSI721_INT_IMSG_CHAN(ch))) |
| 514 | continue; |
| 515 | tsi721_imsg_handler(priv, ch); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | if (dev_ch_int & TSI721_INT_OMSG_CHAN_M) { /* Outbound Msg */ |
| 520 | /* Disable signaled OB MSG Channel interrupts */ |
| 521 | ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 522 | ch_inte &= ~(dev_ch_int & TSI721_INT_OMSG_CHAN_M); |
| 523 | iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); |
| 524 | |
| 525 | /* |
| 526 | * Process Outbound Message interrupts for each MBOX |
| 527 | */ |
| 528 | |
| 529 | for (ch = 0; ch < RIO_MAX_MBOX; ch++) { |
| 530 | if (!(dev_ch_int & TSI721_INT_OMSG_CHAN(ch))) |
| 531 | continue; |
| 532 | tsi721_omsg_handler(priv, ch); |
| 533 | } |
| 534 | } |
| 535 | } |
| 536 | |
| 537 | if (dev_int & TSI721_DEV_INT_SRIO) { |
| 538 | /* Service SRIO MAC interrupts */ |
| 539 | intval = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT); |
| 540 | if (intval & TSI721_RIO_EM_INT_STAT_PW_RX) |
| 541 | tsi721_pw_handler(mport); |
| 542 | } |
| 543 | |
| 544 | return IRQ_HANDLED; |
| 545 | } |
| 546 | |
| 547 | static void tsi721_interrupts_init(struct tsi721_device *priv) |
| 548 | { |
| 549 | u32 intr; |
| 550 | |
| 551 | /* Enable IDB interrupts */ |
| 552 | iowrite32(TSI721_SR_CHINT_ALL, |
| 553 | priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); |
| 554 | iowrite32(TSI721_SR_CHINT_IDBQRCV, |
| 555 | priv->regs + TSI721_SR_CHINTE(IDB_QUEUE)); |
| 556 | iowrite32(TSI721_INT_SR2PC_CHAN(IDB_QUEUE), |
| 557 | priv->regs + TSI721_DEV_CHAN_INTE); |
| 558 | |
| 559 | /* Enable SRIO MAC interrupts */ |
| 560 | iowrite32(TSI721_RIO_EM_DEV_INT_EN_INT, |
| 561 | priv->regs + TSI721_RIO_EM_DEV_INT_EN); |
| 562 | |
| 563 | if (priv->flags & TSI721_USING_MSIX) |
| 564 | intr = TSI721_DEV_INT_SRIO; |
| 565 | else |
| 566 | intr = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO | |
| 567 | TSI721_DEV_INT_SMSG_CH; |
| 568 | |
| 569 | iowrite32(intr, priv->regs + TSI721_DEV_INTE); |
| 570 | ioread32(priv->regs + TSI721_DEV_INTE); |
| 571 | } |
| 572 | |
| 573 | #ifdef CONFIG_PCI_MSI |
| 574 | /** |
| 575 | * tsi721_omsg_msix - MSI-X interrupt handler for outbound messaging |
| 576 | * @irq: Linux interrupt number |
| 577 | * @ptr: Pointer to interrupt-specific data (mport structure) |
| 578 | * |
| 579 | * Handles outbound messaging interrupts signaled using MSI-X. |
| 580 | */ |
| 581 | static irqreturn_t tsi721_omsg_msix(int irq, void *ptr) |
| 582 | { |
| 583 | struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv; |
| 584 | int mbox; |
| 585 | |
| 586 | mbox = (irq - priv->msix[TSI721_VECT_OMB0_DONE].vector) % RIO_MAX_MBOX; |
| 587 | tsi721_omsg_handler(priv, mbox); |
| 588 | return IRQ_HANDLED; |
| 589 | } |
| 590 | |
| 591 | /** |
| 592 | * tsi721_imsg_msix - MSI-X interrupt handler for inbound messaging |
| 593 | * @irq: Linux interrupt number |
| 594 | * @ptr: Pointer to interrupt-specific data (mport structure) |
| 595 | * |
| 596 | * Handles inbound messaging interrupts signaled using MSI-X. |
| 597 | */ |
| 598 | static irqreturn_t tsi721_imsg_msix(int irq, void *ptr) |
| 599 | { |
| 600 | struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv; |
| 601 | int mbox; |
| 602 | |
| 603 | mbox = (irq - priv->msix[TSI721_VECT_IMB0_RCV].vector) % RIO_MAX_MBOX; |
| 604 | tsi721_imsg_handler(priv, mbox + 4); |
| 605 | return IRQ_HANDLED; |
| 606 | } |
| 607 | |
| 608 | /** |
| 609 | * tsi721_srio_msix - Tsi721 MSI-X SRIO MAC interrupt handler |
| 610 | * @irq: Linux interrupt number |
| 611 | * @ptr: Pointer to interrupt-specific data (mport structure) |
| 612 | * |
| 613 | * Handles Tsi721 interrupts from SRIO MAC. |
| 614 | */ |
| 615 | static irqreturn_t tsi721_srio_msix(int irq, void *ptr) |
| 616 | { |
| 617 | struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv; |
| 618 | u32 srio_int; |
| 619 | |
| 620 | /* Service SRIO MAC interrupts */ |
| 621 | srio_int = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT); |
| 622 | if (srio_int & TSI721_RIO_EM_INT_STAT_PW_RX) |
| 623 | tsi721_pw_handler((struct rio_mport *)ptr); |
| 624 | |
| 625 | return IRQ_HANDLED; |
| 626 | } |
| 627 | |
| 628 | /** |
| 629 | * tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler |
| 630 | * @irq: Linux interrupt number |
| 631 | * @ptr: Pointer to interrupt-specific data (mport structure) |
| 632 | * |
| 633 | * Handles Tsi721 interrupts from SR2PC Channel. |
| 634 | * NOTE: At this moment services only one SR2PC channel associated with inbound |
| 635 | * doorbells. |
| 636 | */ |
| 637 | static irqreturn_t tsi721_sr2pc_ch_msix(int irq, void *ptr) |
| 638 | { |
| 639 | struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv; |
| 640 | u32 sr_ch_int; |
| 641 | |
| 642 | /* Service Inbound DB interrupt from SR2PC channel */ |
| 643 | sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); |
| 644 | if (sr_ch_int & TSI721_SR_CHINT_IDBQRCV) |
| 645 | tsi721_dbell_handler((struct rio_mport *)ptr); |
| 646 | |
| 647 | /* Clear interrupts */ |
| 648 | iowrite32(sr_ch_int, priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); |
| 649 | /* Read back to ensure that interrupt was cleared */ |
| 650 | sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE)); |
| 651 | |
| 652 | return IRQ_HANDLED; |
| 653 | } |
| 654 | |
| 655 | /** |
| 656 | * tsi721_request_msix - register interrupt service for MSI-X mode. |
| 657 | * @mport: RapidIO master port structure |
| 658 | * |
| 659 | * Registers MSI-X interrupt service routines for interrupts that are active |
| 660 | * immediately after mport initialization. Messaging interrupt service routines |
| 661 | * should be registered during corresponding open requests. |
| 662 | */ |
| 663 | static int tsi721_request_msix(struct rio_mport *mport) |
| 664 | { |
| 665 | struct tsi721_device *priv = mport->priv; |
| 666 | int err = 0; |
| 667 | |
| 668 | err = request_irq(priv->msix[TSI721_VECT_IDB].vector, |
| 669 | tsi721_sr2pc_ch_msix, 0, |
| 670 | priv->msix[TSI721_VECT_IDB].irq_name, (void *)mport); |
| 671 | if (err) |
| 672 | goto out; |
| 673 | |
| 674 | err = request_irq(priv->msix[TSI721_VECT_PWRX].vector, |
| 675 | tsi721_srio_msix, 0, |
| 676 | priv->msix[TSI721_VECT_PWRX].irq_name, (void *)mport); |
| 677 | if (err) |
| 678 | free_irq( |
| 679 | priv->msix[TSI721_VECT_IDB].vector, |
| 680 | (void *)mport); |
| 681 | out: |
| 682 | return err; |
| 683 | } |
| 684 | |
| 685 | /** |
| 686 | * tsi721_enable_msix - Attempts to enable MSI-X support for Tsi721. |
| 687 | * @priv: pointer to tsi721 private data |
| 688 | * |
| 689 | * Configures MSI-X support for Tsi721. Supports only an exact number |
| 690 | * of requested vectors. |
| 691 | */ |
| 692 | static int tsi721_enable_msix(struct tsi721_device *priv) |
| 693 | { |
| 694 | struct msix_entry entries[TSI721_VECT_MAX]; |
| 695 | int err; |
| 696 | int i; |
| 697 | |
| 698 | entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE); |
| 699 | entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT; |
| 700 | |
| 701 | /* |
| 702 | * Initialize MSI-X entries for Messaging Engine: |
| 703 | * this driver supports four RIO mailboxes (inbound and outbound) |
| 704 | * NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore |
| 705 | * offset +4 is added to IB MBOX number. |
| 706 | */ |
| 707 | for (i = 0; i < RIO_MAX_MBOX; i++) { |
| 708 | entries[TSI721_VECT_IMB0_RCV + i].entry = |
| 709 | TSI721_MSIX_IMSG_DQ_RCV(i + 4); |
| 710 | entries[TSI721_VECT_IMB0_INT + i].entry = |
| 711 | TSI721_MSIX_IMSG_INT(i + 4); |
| 712 | entries[TSI721_VECT_OMB0_DONE + i].entry = |
| 713 | TSI721_MSIX_OMSG_DONE(i); |
| 714 | entries[TSI721_VECT_OMB0_INT + i].entry = |
| 715 | TSI721_MSIX_OMSG_INT(i); |
| 716 | } |
| 717 | |
| 718 | err = pci_enable_msix(priv->pdev, entries, ARRAY_SIZE(entries)); |
| 719 | if (err) { |
| 720 | if (err > 0) |
| 721 | dev_info(&priv->pdev->dev, |
| 722 | "Only %d MSI-X vectors available, " |
| 723 | "not using MSI-X\n", err); |
| 724 | return err; |
| 725 | } |
| 726 | |
| 727 | /* |
| 728 | * Copy MSI-X vector information into tsi721 private structure |
| 729 | */ |
| 730 | priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector; |
| 731 | snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX, |
| 732 | DRV_NAME "-idb@pci:%s", pci_name(priv->pdev)); |
| 733 | priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector; |
| 734 | snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX, |
| 735 | DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev)); |
| 736 | |
| 737 | for (i = 0; i < RIO_MAX_MBOX; i++) { |
| 738 | priv->msix[TSI721_VECT_IMB0_RCV + i].vector = |
| 739 | entries[TSI721_VECT_IMB0_RCV + i].vector; |
| 740 | snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name, |
| 741 | IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s", |
| 742 | i, pci_name(priv->pdev)); |
| 743 | |
| 744 | priv->msix[TSI721_VECT_IMB0_INT + i].vector = |
| 745 | entries[TSI721_VECT_IMB0_INT + i].vector; |
| 746 | snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name, |
| 747 | IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s", |
| 748 | i, pci_name(priv->pdev)); |
| 749 | |
| 750 | priv->msix[TSI721_VECT_OMB0_DONE + i].vector = |
| 751 | entries[TSI721_VECT_OMB0_DONE + i].vector; |
| 752 | snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name, |
| 753 | IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s", |
| 754 | i, pci_name(priv->pdev)); |
| 755 | |
| 756 | priv->msix[TSI721_VECT_OMB0_INT + i].vector = |
| 757 | entries[TSI721_VECT_OMB0_INT + i].vector; |
| 758 | snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name, |
| 759 | IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s", |
| 760 | i, pci_name(priv->pdev)); |
| 761 | } |
| 762 | |
| 763 | return 0; |
| 764 | } |
| 765 | #endif /* CONFIG_PCI_MSI */ |
| 766 | |
| 767 | static int tsi721_request_irq(struct rio_mport *mport) |
| 768 | { |
| 769 | struct tsi721_device *priv = mport->priv; |
| 770 | int err; |
| 771 | |
| 772 | #ifdef CONFIG_PCI_MSI |
| 773 | if (priv->flags & TSI721_USING_MSIX) |
| 774 | err = tsi721_request_msix(mport); |
| 775 | else |
| 776 | #endif |
| 777 | err = request_irq(priv->pdev->irq, tsi721_irqhandler, |
| 778 | (priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED, |
| 779 | DRV_NAME, (void *)mport); |
| 780 | |
| 781 | if (err) |
| 782 | dev_err(&priv->pdev->dev, |
| 783 | "Unable to allocate interrupt, Error: %d\n", err); |
| 784 | |
| 785 | return err; |
| 786 | } |
| 787 | |
| 788 | /** |
| 789 | * tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO) |
| 790 | * translation regions. |
| 791 | * @priv: pointer to tsi721 private data |
| 792 | * |
| 793 | * Disables SREP translation regions. |
| 794 | */ |
| 795 | static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv) |
| 796 | { |
| 797 | int i; |
| 798 | |
| 799 | /* Disable all PC2SR translation windows */ |
| 800 | for (i = 0; i < TSI721_OBWIN_NUM; i++) |
| 801 | iowrite32(0, priv->regs + TSI721_OBWINLB(i)); |
| 802 | } |
| 803 | |
| 804 | /** |
| 805 | * tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe) |
| 806 | * translation regions. |
| 807 | * @priv: pointer to tsi721 private data |
| 808 | * |
| 809 | * Disables inbound windows. |
| 810 | */ |
| 811 | static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv) |
| 812 | { |
| 813 | int i; |
| 814 | |
| 815 | /* Disable all SR2PC inbound windows */ |
| 816 | for (i = 0; i < TSI721_IBWIN_NUM; i++) |
| 817 | iowrite32(0, priv->regs + TSI721_IBWINLB(i)); |
| 818 | } |
| 819 | |
| 820 | /** |
| 821 | * tsi721_port_write_init - Inbound port write interface init |
| 822 | * @priv: pointer to tsi721 private data |
| 823 | * |
| 824 | * Initializes inbound port write handler. |
| 825 | * Returns %0 on success or %-ENOMEM on failure. |
| 826 | */ |
| 827 | static int tsi721_port_write_init(struct tsi721_device *priv) |
| 828 | { |
| 829 | priv->pw_discard_count = 0; |
| 830 | INIT_WORK(&priv->pw_work, tsi721_pw_dpc); |
| 831 | spin_lock_init(&priv->pw_fifo_lock); |
| 832 | if (kfifo_alloc(&priv->pw_fifo, |
| 833 | TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) { |
| 834 | dev_err(&priv->pdev->dev, "PW FIFO allocation failed\n"); |
| 835 | return -ENOMEM; |
| 836 | } |
| 837 | |
| 838 | /* Use reliable port-write capture mode */ |
| 839 | iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL); |
| 840 | return 0; |
| 841 | } |
| 842 | |
| 843 | static int tsi721_doorbell_init(struct tsi721_device *priv) |
| 844 | { |
| 845 | /* Outbound Doorbells do not require any setup. |
| 846 | * Tsi721 uses dedicated PCI BAR1 to generate doorbells. |
| 847 | * That BAR1 was mapped during the probe routine. |
| 848 | */ |
| 849 | |
| 850 | /* Initialize Inbound Doorbell processing DPC and queue */ |
| 851 | priv->db_discard_count = 0; |
| 852 | INIT_WORK(&priv->idb_work, tsi721_db_dpc); |
| 853 | |
| 854 | /* Allocate buffer for inbound doorbells queue */ |
Alexandre Bounine | ceb9639 | 2011-12-08 14:34:35 -0800 | [diff] [blame] | 855 | priv->idb_base = dma_zalloc_coherent(&priv->pdev->dev, |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 856 | IDB_QSIZE * TSI721_IDB_ENTRY_SIZE, |
| 857 | &priv->idb_dma, GFP_KERNEL); |
| 858 | if (!priv->idb_base) |
| 859 | return -ENOMEM; |
| 860 | |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 861 | dev_dbg(&priv->pdev->dev, "Allocated IDB buffer @ %p (phys = %llx)\n", |
| 862 | priv->idb_base, (unsigned long long)priv->idb_dma); |
| 863 | |
| 864 | iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE), |
| 865 | priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE)); |
| 866 | iowrite32(((u64)priv->idb_dma >> 32), |
| 867 | priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE)); |
| 868 | iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR), |
| 869 | priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE)); |
| 870 | /* Enable accepting all inbound doorbells */ |
| 871 | iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE)); |
| 872 | |
| 873 | iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE)); |
| 874 | |
| 875 | iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE)); |
| 876 | |
| 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | static void tsi721_doorbell_free(struct tsi721_device *priv) |
| 881 | { |
| 882 | if (priv->idb_base == NULL) |
| 883 | return; |
| 884 | |
| 885 | /* Free buffer allocated for inbound doorbell queue */ |
| 886 | dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE, |
| 887 | priv->idb_base, priv->idb_dma); |
| 888 | priv->idb_base = NULL; |
| 889 | } |
| 890 | |
| 891 | static int tsi721_bdma_ch_init(struct tsi721_device *priv, int chnum) |
| 892 | { |
| 893 | struct tsi721_dma_desc *bd_ptr; |
| 894 | u64 *sts_ptr; |
| 895 | dma_addr_t bd_phys, sts_phys; |
| 896 | int sts_size; |
| 897 | int bd_num = priv->bdma[chnum].bd_num; |
| 898 | |
| 899 | dev_dbg(&priv->pdev->dev, "Init Block DMA Engine, CH%d\n", chnum); |
| 900 | |
| 901 | /* |
| 902 | * Initialize DMA channel for maintenance requests |
| 903 | */ |
| 904 | |
| 905 | /* Allocate space for DMA descriptors */ |
Alexandre Bounine | ceb9639 | 2011-12-08 14:34:35 -0800 | [diff] [blame] | 906 | bd_ptr = dma_zalloc_coherent(&priv->pdev->dev, |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 907 | bd_num * sizeof(struct tsi721_dma_desc), |
| 908 | &bd_phys, GFP_KERNEL); |
| 909 | if (!bd_ptr) |
| 910 | return -ENOMEM; |
| 911 | |
| 912 | priv->bdma[chnum].bd_phys = bd_phys; |
| 913 | priv->bdma[chnum].bd_base = bd_ptr; |
| 914 | |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 915 | dev_dbg(&priv->pdev->dev, "DMA descriptors @ %p (phys = %llx)\n", |
| 916 | bd_ptr, (unsigned long long)bd_phys); |
| 917 | |
| 918 | /* Allocate space for descriptor status FIFO */ |
| 919 | sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ? |
| 920 | bd_num : TSI721_DMA_MINSTSSZ; |
| 921 | sts_size = roundup_pow_of_two(sts_size); |
Alexandre Bounine | ceb9639 | 2011-12-08 14:34:35 -0800 | [diff] [blame] | 922 | sts_ptr = dma_zalloc_coherent(&priv->pdev->dev, |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 923 | sts_size * sizeof(struct tsi721_dma_sts), |
| 924 | &sts_phys, GFP_KERNEL); |
| 925 | if (!sts_ptr) { |
| 926 | /* Free space allocated for DMA descriptors */ |
| 927 | dma_free_coherent(&priv->pdev->dev, |
| 928 | bd_num * sizeof(struct tsi721_dma_desc), |
| 929 | bd_ptr, bd_phys); |
| 930 | priv->bdma[chnum].bd_base = NULL; |
| 931 | return -ENOMEM; |
| 932 | } |
| 933 | |
| 934 | priv->bdma[chnum].sts_phys = sts_phys; |
| 935 | priv->bdma[chnum].sts_base = sts_ptr; |
| 936 | priv->bdma[chnum].sts_size = sts_size; |
| 937 | |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 938 | dev_dbg(&priv->pdev->dev, |
| 939 | "desc status FIFO @ %p (phys = %llx) size=0x%x\n", |
| 940 | sts_ptr, (unsigned long long)sts_phys, sts_size); |
| 941 | |
| 942 | /* Initialize DMA descriptors ring */ |
| 943 | bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29); |
| 944 | bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys & |
| 945 | TSI721_DMAC_DPTRL_MASK); |
| 946 | bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32); |
| 947 | |
| 948 | /* Setup DMA descriptor pointers */ |
| 949 | iowrite32(((u64)bd_phys >> 32), |
| 950 | priv->regs + TSI721_DMAC_DPTRH(chnum)); |
| 951 | iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK), |
| 952 | priv->regs + TSI721_DMAC_DPTRL(chnum)); |
| 953 | |
| 954 | /* Setup descriptor status FIFO */ |
| 955 | iowrite32(((u64)sts_phys >> 32), |
| 956 | priv->regs + TSI721_DMAC_DSBH(chnum)); |
| 957 | iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK), |
| 958 | priv->regs + TSI721_DMAC_DSBL(chnum)); |
| 959 | iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size), |
| 960 | priv->regs + TSI721_DMAC_DSSZ(chnum)); |
| 961 | |
| 962 | /* Clear interrupt bits */ |
| 963 | iowrite32(TSI721_DMAC_INT_ALL, |
| 964 | priv->regs + TSI721_DMAC_INT(chnum)); |
| 965 | |
| 966 | ioread32(priv->regs + TSI721_DMAC_INT(chnum)); |
| 967 | |
| 968 | /* Toggle DMA channel initialization */ |
| 969 | iowrite32(TSI721_DMAC_CTL_INIT, priv->regs + TSI721_DMAC_CTL(chnum)); |
| 970 | ioread32(priv->regs + TSI721_DMAC_CTL(chnum)); |
| 971 | udelay(10); |
| 972 | |
| 973 | return 0; |
| 974 | } |
| 975 | |
| 976 | static int tsi721_bdma_ch_free(struct tsi721_device *priv, int chnum) |
| 977 | { |
| 978 | u32 ch_stat; |
| 979 | |
| 980 | if (priv->bdma[chnum].bd_base == NULL) |
| 981 | return 0; |
| 982 | |
| 983 | /* Check if DMA channel still running */ |
| 984 | ch_stat = ioread32(priv->regs + TSI721_DMAC_STS(chnum)); |
| 985 | if (ch_stat & TSI721_DMAC_STS_RUN) |
| 986 | return -EFAULT; |
| 987 | |
| 988 | /* Put DMA channel into init state */ |
| 989 | iowrite32(TSI721_DMAC_CTL_INIT, |
| 990 | priv->regs + TSI721_DMAC_CTL(chnum)); |
| 991 | |
| 992 | /* Free space allocated for DMA descriptors */ |
| 993 | dma_free_coherent(&priv->pdev->dev, |
| 994 | priv->bdma[chnum].bd_num * sizeof(struct tsi721_dma_desc), |
| 995 | priv->bdma[chnum].bd_base, priv->bdma[chnum].bd_phys); |
| 996 | priv->bdma[chnum].bd_base = NULL; |
| 997 | |
| 998 | /* Free space allocated for status FIFO */ |
| 999 | dma_free_coherent(&priv->pdev->dev, |
| 1000 | priv->bdma[chnum].sts_size * sizeof(struct tsi721_dma_sts), |
| 1001 | priv->bdma[chnum].sts_base, priv->bdma[chnum].sts_phys); |
| 1002 | priv->bdma[chnum].sts_base = NULL; |
| 1003 | return 0; |
| 1004 | } |
| 1005 | |
| 1006 | static int tsi721_bdma_init(struct tsi721_device *priv) |
| 1007 | { |
| 1008 | /* Initialize BDMA channel allocated for RapidIO maintenance read/write |
| 1009 | * request generation |
| 1010 | */ |
| 1011 | priv->bdma[TSI721_DMACH_MAINT].bd_num = 2; |
| 1012 | if (tsi721_bdma_ch_init(priv, TSI721_DMACH_MAINT)) { |
| 1013 | dev_err(&priv->pdev->dev, "Unable to initialize maintenance DMA" |
| 1014 | " channel %d, aborting\n", TSI721_DMACH_MAINT); |
| 1015 | return -ENOMEM; |
| 1016 | } |
| 1017 | |
| 1018 | return 0; |
| 1019 | } |
| 1020 | |
| 1021 | static void tsi721_bdma_free(struct tsi721_device *priv) |
| 1022 | { |
| 1023 | tsi721_bdma_ch_free(priv, TSI721_DMACH_MAINT); |
| 1024 | } |
| 1025 | |
| 1026 | /* Enable Inbound Messaging Interrupts */ |
| 1027 | static void |
| 1028 | tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch, |
| 1029 | u32 inte_mask) |
| 1030 | { |
| 1031 | u32 rval; |
| 1032 | |
| 1033 | if (!inte_mask) |
| 1034 | return; |
| 1035 | |
| 1036 | /* Clear pending Inbound Messaging interrupts */ |
| 1037 | iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch)); |
| 1038 | |
| 1039 | /* Enable Inbound Messaging interrupts */ |
| 1040 | rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch)); |
| 1041 | iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch)); |
| 1042 | |
| 1043 | if (priv->flags & TSI721_USING_MSIX) |
| 1044 | return; /* Finished if we are in MSI-X mode */ |
| 1045 | |
| 1046 | /* |
| 1047 | * For MSI and INTA interrupt signalling we need to enable next levels |
| 1048 | */ |
| 1049 | |
| 1050 | /* Enable Device Channel Interrupt */ |
| 1051 | rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 1052 | iowrite32(rval | TSI721_INT_IMSG_CHAN(ch), |
| 1053 | priv->regs + TSI721_DEV_CHAN_INTE); |
| 1054 | } |
| 1055 | |
| 1056 | /* Disable Inbound Messaging Interrupts */ |
| 1057 | static void |
| 1058 | tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch, |
| 1059 | u32 inte_mask) |
| 1060 | { |
| 1061 | u32 rval; |
| 1062 | |
| 1063 | if (!inte_mask) |
| 1064 | return; |
| 1065 | |
| 1066 | /* Clear pending Inbound Messaging interrupts */ |
| 1067 | iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch)); |
| 1068 | |
| 1069 | /* Disable Inbound Messaging interrupts */ |
| 1070 | rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch)); |
| 1071 | rval &= ~inte_mask; |
| 1072 | iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch)); |
| 1073 | |
| 1074 | if (priv->flags & TSI721_USING_MSIX) |
| 1075 | return; /* Finished if we are in MSI-X mode */ |
| 1076 | |
| 1077 | /* |
| 1078 | * For MSI and INTA interrupt signalling we need to disable next levels |
| 1079 | */ |
| 1080 | |
| 1081 | /* Disable Device Channel Interrupt */ |
| 1082 | rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 1083 | rval &= ~TSI721_INT_IMSG_CHAN(ch); |
| 1084 | iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE); |
| 1085 | } |
| 1086 | |
| 1087 | /* Enable Outbound Messaging interrupts */ |
| 1088 | static void |
| 1089 | tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch, |
| 1090 | u32 inte_mask) |
| 1091 | { |
| 1092 | u32 rval; |
| 1093 | |
| 1094 | if (!inte_mask) |
| 1095 | return; |
| 1096 | |
| 1097 | /* Clear pending Outbound Messaging interrupts */ |
| 1098 | iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch)); |
| 1099 | |
| 1100 | /* Enable Outbound Messaging channel interrupts */ |
| 1101 | rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch)); |
| 1102 | iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch)); |
| 1103 | |
| 1104 | if (priv->flags & TSI721_USING_MSIX) |
| 1105 | return; /* Finished if we are in MSI-X mode */ |
| 1106 | |
| 1107 | /* |
| 1108 | * For MSI and INTA interrupt signalling we need to enable next levels |
| 1109 | */ |
| 1110 | |
| 1111 | /* Enable Device Channel Interrupt */ |
| 1112 | rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 1113 | iowrite32(rval | TSI721_INT_OMSG_CHAN(ch), |
| 1114 | priv->regs + TSI721_DEV_CHAN_INTE); |
| 1115 | } |
| 1116 | |
| 1117 | /* Disable Outbound Messaging interrupts */ |
| 1118 | static void |
| 1119 | tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch, |
| 1120 | u32 inte_mask) |
| 1121 | { |
| 1122 | u32 rval; |
| 1123 | |
| 1124 | if (!inte_mask) |
| 1125 | return; |
| 1126 | |
| 1127 | /* Clear pending Outbound Messaging interrupts */ |
| 1128 | iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch)); |
| 1129 | |
| 1130 | /* Disable Outbound Messaging interrupts */ |
| 1131 | rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch)); |
| 1132 | rval &= ~inte_mask; |
| 1133 | iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch)); |
| 1134 | |
| 1135 | if (priv->flags & TSI721_USING_MSIX) |
| 1136 | return; /* Finished if we are in MSI-X mode */ |
| 1137 | |
| 1138 | /* |
| 1139 | * For MSI and INTA interrupt signalling we need to disable next levels |
| 1140 | */ |
| 1141 | |
| 1142 | /* Disable Device Channel Interrupt */ |
| 1143 | rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 1144 | rval &= ~TSI721_INT_OMSG_CHAN(ch); |
| 1145 | iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE); |
| 1146 | } |
| 1147 | |
| 1148 | /** |
| 1149 | * tsi721_add_outb_message - Add message to the Tsi721 outbound message queue |
| 1150 | * @mport: Master port with outbound message queue |
| 1151 | * @rdev: Target of outbound message |
| 1152 | * @mbox: Outbound mailbox |
| 1153 | * @buffer: Message to add to outbound queue |
| 1154 | * @len: Length of message |
| 1155 | */ |
| 1156 | static int |
| 1157 | tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox, |
| 1158 | void *buffer, size_t len) |
| 1159 | { |
| 1160 | struct tsi721_device *priv = mport->priv; |
| 1161 | struct tsi721_omsg_desc *desc; |
| 1162 | u32 tx_slot; |
| 1163 | |
| 1164 | if (!priv->omsg_init[mbox] || |
| 1165 | len > TSI721_MSG_MAX_SIZE || len < 8) |
| 1166 | return -EINVAL; |
| 1167 | |
| 1168 | tx_slot = priv->omsg_ring[mbox].tx_slot; |
| 1169 | |
| 1170 | /* Copy copy message into transfer buffer */ |
| 1171 | memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len); |
| 1172 | |
| 1173 | if (len & 0x7) |
| 1174 | len += 8; |
| 1175 | |
| 1176 | /* Build descriptor associated with buffer */ |
| 1177 | desc = priv->omsg_ring[mbox].omd_base; |
| 1178 | desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid); |
| 1179 | if (tx_slot % 4 == 0) |
| 1180 | desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF); |
| 1181 | |
| 1182 | desc[tx_slot].msg_info = |
| 1183 | cpu_to_le32((mport->sys_size << 26) | (mbox << 22) | |
| 1184 | (0xe << 12) | (len & 0xff8)); |
| 1185 | desc[tx_slot].bufptr_lo = |
| 1186 | cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] & |
| 1187 | 0xffffffff); |
| 1188 | desc[tx_slot].bufptr_hi = |
| 1189 | cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32); |
| 1190 | |
| 1191 | priv->omsg_ring[mbox].wr_count++; |
| 1192 | |
| 1193 | /* Go to next descriptor */ |
| 1194 | if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) { |
| 1195 | priv->omsg_ring[mbox].tx_slot = 0; |
| 1196 | /* Move through the ring link descriptor at the end */ |
| 1197 | priv->omsg_ring[mbox].wr_count++; |
| 1198 | } |
| 1199 | |
| 1200 | mb(); |
| 1201 | |
| 1202 | /* Set new write count value */ |
| 1203 | iowrite32(priv->omsg_ring[mbox].wr_count, |
| 1204 | priv->regs + TSI721_OBDMAC_DWRCNT(mbox)); |
| 1205 | ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox)); |
| 1206 | |
| 1207 | return 0; |
| 1208 | } |
| 1209 | |
| 1210 | /** |
| 1211 | * tsi721_omsg_handler - Outbound Message Interrupt Handler |
| 1212 | * @priv: pointer to tsi721 private data |
| 1213 | * @ch: number of OB MSG channel to service |
| 1214 | * |
| 1215 | * Services channel interrupts from outbound messaging engine. |
| 1216 | */ |
| 1217 | static void tsi721_omsg_handler(struct tsi721_device *priv, int ch) |
| 1218 | { |
| 1219 | u32 omsg_int; |
| 1220 | |
| 1221 | spin_lock(&priv->omsg_ring[ch].lock); |
| 1222 | |
| 1223 | omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch)); |
| 1224 | |
| 1225 | if (omsg_int & TSI721_OBDMAC_INT_ST_FULL) |
| 1226 | dev_info(&priv->pdev->dev, |
| 1227 | "OB MBOX%d: Status FIFO is full\n", ch); |
| 1228 | |
| 1229 | if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) { |
| 1230 | u32 srd_ptr; |
| 1231 | u64 *sts_ptr, last_ptr = 0, prev_ptr = 0; |
| 1232 | int i, j; |
| 1233 | u32 tx_slot; |
| 1234 | |
| 1235 | /* |
| 1236 | * Find last successfully processed descriptor |
| 1237 | */ |
| 1238 | |
| 1239 | /* Check and clear descriptor status FIFO entries */ |
| 1240 | srd_ptr = priv->omsg_ring[ch].sts_rdptr; |
| 1241 | sts_ptr = priv->omsg_ring[ch].sts_base; |
| 1242 | j = srd_ptr * 8; |
| 1243 | while (sts_ptr[j]) { |
| 1244 | for (i = 0; i < 8 && sts_ptr[j]; i++, j++) { |
| 1245 | prev_ptr = last_ptr; |
| 1246 | last_ptr = le64_to_cpu(sts_ptr[j]); |
| 1247 | sts_ptr[j] = 0; |
| 1248 | } |
| 1249 | |
| 1250 | ++srd_ptr; |
| 1251 | srd_ptr %= priv->omsg_ring[ch].sts_size; |
| 1252 | j = srd_ptr * 8; |
| 1253 | } |
| 1254 | |
| 1255 | if (last_ptr == 0) |
| 1256 | goto no_sts_update; |
| 1257 | |
| 1258 | priv->omsg_ring[ch].sts_rdptr = srd_ptr; |
| 1259 | iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch)); |
| 1260 | |
| 1261 | if (!priv->mport->outb_msg[ch].mcback) |
| 1262 | goto no_sts_update; |
| 1263 | |
| 1264 | /* Inform upper layer about transfer completion */ |
| 1265 | |
| 1266 | tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/ |
| 1267 | sizeof(struct tsi721_omsg_desc); |
| 1268 | |
| 1269 | /* |
| 1270 | * Check if this is a Link Descriptor (LD). |
| 1271 | * If yes, ignore LD and use descriptor processed |
| 1272 | * before LD. |
| 1273 | */ |
| 1274 | if (tx_slot == priv->omsg_ring[ch].size) { |
| 1275 | if (prev_ptr) |
| 1276 | tx_slot = (prev_ptr - |
| 1277 | (u64)priv->omsg_ring[ch].omd_phys)/ |
| 1278 | sizeof(struct tsi721_omsg_desc); |
| 1279 | else |
| 1280 | goto no_sts_update; |
| 1281 | } |
| 1282 | |
| 1283 | /* Move slot index to the next message to be sent */ |
| 1284 | ++tx_slot; |
| 1285 | if (tx_slot == priv->omsg_ring[ch].size) |
| 1286 | tx_slot = 0; |
| 1287 | BUG_ON(tx_slot >= priv->omsg_ring[ch].size); |
| 1288 | priv->mport->outb_msg[ch].mcback(priv->mport, |
| 1289 | priv->omsg_ring[ch].dev_id, ch, |
| 1290 | tx_slot); |
| 1291 | } |
| 1292 | |
| 1293 | no_sts_update: |
| 1294 | |
| 1295 | if (omsg_int & TSI721_OBDMAC_INT_ERROR) { |
| 1296 | /* |
| 1297 | * Outbound message operation aborted due to error, |
| 1298 | * reinitialize OB MSG channel |
| 1299 | */ |
| 1300 | |
| 1301 | dev_dbg(&priv->pdev->dev, "OB MSG ABORT ch_stat=%x\n", |
| 1302 | ioread32(priv->regs + TSI721_OBDMAC_STS(ch))); |
| 1303 | |
| 1304 | iowrite32(TSI721_OBDMAC_INT_ERROR, |
| 1305 | priv->regs + TSI721_OBDMAC_INT(ch)); |
| 1306 | iowrite32(TSI721_OBDMAC_CTL_INIT, |
| 1307 | priv->regs + TSI721_OBDMAC_CTL(ch)); |
| 1308 | ioread32(priv->regs + TSI721_OBDMAC_CTL(ch)); |
| 1309 | |
| 1310 | /* Inform upper level to clear all pending tx slots */ |
| 1311 | if (priv->mport->outb_msg[ch].mcback) |
| 1312 | priv->mport->outb_msg[ch].mcback(priv->mport, |
| 1313 | priv->omsg_ring[ch].dev_id, ch, |
| 1314 | priv->omsg_ring[ch].tx_slot); |
| 1315 | /* Synch tx_slot tracking */ |
| 1316 | iowrite32(priv->omsg_ring[ch].tx_slot, |
| 1317 | priv->regs + TSI721_OBDMAC_DRDCNT(ch)); |
| 1318 | ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch)); |
| 1319 | priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot; |
| 1320 | priv->omsg_ring[ch].sts_rdptr = 0; |
| 1321 | } |
| 1322 | |
| 1323 | /* Clear channel interrupts */ |
| 1324 | iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch)); |
| 1325 | |
| 1326 | if (!(priv->flags & TSI721_USING_MSIX)) { |
| 1327 | u32 ch_inte; |
| 1328 | |
| 1329 | /* Re-enable channel interrupts */ |
| 1330 | ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 1331 | ch_inte |= TSI721_INT_OMSG_CHAN(ch); |
| 1332 | iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); |
| 1333 | } |
| 1334 | |
| 1335 | spin_unlock(&priv->omsg_ring[ch].lock); |
| 1336 | } |
| 1337 | |
| 1338 | /** |
| 1339 | * tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox |
| 1340 | * @mport: Master port implementing Outbound Messaging Engine |
| 1341 | * @dev_id: Device specific pointer to pass on event |
| 1342 | * @mbox: Mailbox to open |
| 1343 | * @entries: Number of entries in the outbound mailbox ring |
| 1344 | */ |
| 1345 | static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id, |
| 1346 | int mbox, int entries) |
| 1347 | { |
| 1348 | struct tsi721_device *priv = mport->priv; |
| 1349 | struct tsi721_omsg_desc *bd_ptr; |
| 1350 | int i, rc = 0; |
| 1351 | |
| 1352 | if ((entries < TSI721_OMSGD_MIN_RING_SIZE) || |
| 1353 | (entries > (TSI721_OMSGD_RING_SIZE)) || |
| 1354 | (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) { |
| 1355 | rc = -EINVAL; |
| 1356 | goto out; |
| 1357 | } |
| 1358 | |
| 1359 | priv->omsg_ring[mbox].dev_id = dev_id; |
| 1360 | priv->omsg_ring[mbox].size = entries; |
| 1361 | priv->omsg_ring[mbox].sts_rdptr = 0; |
| 1362 | spin_lock_init(&priv->omsg_ring[mbox].lock); |
| 1363 | |
| 1364 | /* Outbound Msg Buffer allocation based on |
| 1365 | the number of maximum descriptor entries */ |
| 1366 | for (i = 0; i < entries; i++) { |
| 1367 | priv->omsg_ring[mbox].omq_base[i] = |
| 1368 | dma_alloc_coherent( |
| 1369 | &priv->pdev->dev, TSI721_MSG_BUFFER_SIZE, |
| 1370 | &priv->omsg_ring[mbox].omq_phys[i], |
| 1371 | GFP_KERNEL); |
| 1372 | if (priv->omsg_ring[mbox].omq_base[i] == NULL) { |
| 1373 | dev_dbg(&priv->pdev->dev, |
| 1374 | "Unable to allocate OB MSG data buffer for" |
| 1375 | " MBOX%d\n", mbox); |
| 1376 | rc = -ENOMEM; |
| 1377 | goto out_buf; |
| 1378 | } |
| 1379 | } |
| 1380 | |
| 1381 | /* Outbound message descriptor allocation */ |
| 1382 | priv->omsg_ring[mbox].omd_base = dma_alloc_coherent( |
| 1383 | &priv->pdev->dev, |
| 1384 | (entries + 1) * sizeof(struct tsi721_omsg_desc), |
| 1385 | &priv->omsg_ring[mbox].omd_phys, GFP_KERNEL); |
| 1386 | if (priv->omsg_ring[mbox].omd_base == NULL) { |
| 1387 | dev_dbg(&priv->pdev->dev, |
| 1388 | "Unable to allocate OB MSG descriptor memory " |
| 1389 | "for MBOX%d\n", mbox); |
| 1390 | rc = -ENOMEM; |
| 1391 | goto out_buf; |
| 1392 | } |
| 1393 | |
| 1394 | priv->omsg_ring[mbox].tx_slot = 0; |
| 1395 | |
| 1396 | /* Outbound message descriptor status FIFO allocation */ |
| 1397 | priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1); |
Alexandre Bounine | ceb9639 | 2011-12-08 14:34:35 -0800 | [diff] [blame] | 1398 | priv->omsg_ring[mbox].sts_base = dma_zalloc_coherent(&priv->pdev->dev, |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 1399 | priv->omsg_ring[mbox].sts_size * |
| 1400 | sizeof(struct tsi721_dma_sts), |
| 1401 | &priv->omsg_ring[mbox].sts_phys, GFP_KERNEL); |
| 1402 | if (priv->omsg_ring[mbox].sts_base == NULL) { |
| 1403 | dev_dbg(&priv->pdev->dev, |
| 1404 | "Unable to allocate OB MSG descriptor status FIFO " |
| 1405 | "for MBOX%d\n", mbox); |
| 1406 | rc = -ENOMEM; |
| 1407 | goto out_desc; |
| 1408 | } |
| 1409 | |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 1410 | /* |
| 1411 | * Configure Outbound Messaging Engine |
| 1412 | */ |
| 1413 | |
| 1414 | /* Setup Outbound Message descriptor pointer */ |
| 1415 | iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32), |
| 1416 | priv->regs + TSI721_OBDMAC_DPTRH(mbox)); |
| 1417 | iowrite32(((u64)priv->omsg_ring[mbox].omd_phys & |
| 1418 | TSI721_OBDMAC_DPTRL_MASK), |
| 1419 | priv->regs + TSI721_OBDMAC_DPTRL(mbox)); |
| 1420 | |
| 1421 | /* Setup Outbound Message descriptor status FIFO */ |
| 1422 | iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32), |
| 1423 | priv->regs + TSI721_OBDMAC_DSBH(mbox)); |
| 1424 | iowrite32(((u64)priv->omsg_ring[mbox].sts_phys & |
| 1425 | TSI721_OBDMAC_DSBL_MASK), |
| 1426 | priv->regs + TSI721_OBDMAC_DSBL(mbox)); |
| 1427 | iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size), |
| 1428 | priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox)); |
| 1429 | |
| 1430 | /* Enable interrupts */ |
| 1431 | |
| 1432 | #ifdef CONFIG_PCI_MSI |
| 1433 | if (priv->flags & TSI721_USING_MSIX) { |
| 1434 | /* Request interrupt service if we are in MSI-X mode */ |
| 1435 | rc = request_irq( |
| 1436 | priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector, |
| 1437 | tsi721_omsg_msix, 0, |
| 1438 | priv->msix[TSI721_VECT_OMB0_DONE + mbox].irq_name, |
| 1439 | (void *)mport); |
| 1440 | |
| 1441 | if (rc) { |
| 1442 | dev_dbg(&priv->pdev->dev, |
| 1443 | "Unable to allocate MSI-X interrupt for " |
| 1444 | "OBOX%d-DONE\n", mbox); |
| 1445 | goto out_stat; |
| 1446 | } |
| 1447 | |
| 1448 | rc = request_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector, |
| 1449 | tsi721_omsg_msix, 0, |
| 1450 | priv->msix[TSI721_VECT_OMB0_INT + mbox].irq_name, |
| 1451 | (void *)mport); |
| 1452 | |
| 1453 | if (rc) { |
| 1454 | dev_dbg(&priv->pdev->dev, |
| 1455 | "Unable to allocate MSI-X interrupt for " |
| 1456 | "MBOX%d-INT\n", mbox); |
| 1457 | free_irq( |
| 1458 | priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector, |
| 1459 | (void *)mport); |
| 1460 | goto out_stat; |
| 1461 | } |
| 1462 | } |
| 1463 | #endif /* CONFIG_PCI_MSI */ |
| 1464 | |
| 1465 | tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL); |
| 1466 | |
| 1467 | /* Initialize Outbound Message descriptors ring */ |
| 1468 | bd_ptr = priv->omsg_ring[mbox].omd_base; |
| 1469 | bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29); |
| 1470 | bd_ptr[entries].msg_info = 0; |
| 1471 | bd_ptr[entries].next_lo = |
| 1472 | cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys & |
| 1473 | TSI721_OBDMAC_DPTRL_MASK); |
| 1474 | bd_ptr[entries].next_hi = |
| 1475 | cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32); |
| 1476 | priv->omsg_ring[mbox].wr_count = 0; |
| 1477 | mb(); |
| 1478 | |
| 1479 | /* Initialize Outbound Message engine */ |
| 1480 | iowrite32(TSI721_OBDMAC_CTL_INIT, priv->regs + TSI721_OBDMAC_CTL(mbox)); |
| 1481 | ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox)); |
| 1482 | udelay(10); |
| 1483 | |
| 1484 | priv->omsg_init[mbox] = 1; |
| 1485 | |
| 1486 | return 0; |
| 1487 | |
| 1488 | #ifdef CONFIG_PCI_MSI |
| 1489 | out_stat: |
| 1490 | dma_free_coherent(&priv->pdev->dev, |
| 1491 | priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts), |
| 1492 | priv->omsg_ring[mbox].sts_base, |
| 1493 | priv->omsg_ring[mbox].sts_phys); |
| 1494 | |
| 1495 | priv->omsg_ring[mbox].sts_base = NULL; |
| 1496 | #endif /* CONFIG_PCI_MSI */ |
| 1497 | |
| 1498 | out_desc: |
| 1499 | dma_free_coherent(&priv->pdev->dev, |
| 1500 | (entries + 1) * sizeof(struct tsi721_omsg_desc), |
| 1501 | priv->omsg_ring[mbox].omd_base, |
| 1502 | priv->omsg_ring[mbox].omd_phys); |
| 1503 | |
| 1504 | priv->omsg_ring[mbox].omd_base = NULL; |
| 1505 | |
| 1506 | out_buf: |
| 1507 | for (i = 0; i < priv->omsg_ring[mbox].size; i++) { |
| 1508 | if (priv->omsg_ring[mbox].omq_base[i]) { |
| 1509 | dma_free_coherent(&priv->pdev->dev, |
| 1510 | TSI721_MSG_BUFFER_SIZE, |
| 1511 | priv->omsg_ring[mbox].omq_base[i], |
| 1512 | priv->omsg_ring[mbox].omq_phys[i]); |
| 1513 | |
| 1514 | priv->omsg_ring[mbox].omq_base[i] = NULL; |
| 1515 | } |
| 1516 | } |
| 1517 | |
| 1518 | out: |
| 1519 | return rc; |
| 1520 | } |
| 1521 | |
| 1522 | /** |
| 1523 | * tsi721_close_outb_mbox - Close Tsi721 outbound mailbox |
| 1524 | * @mport: Master port implementing the outbound message unit |
| 1525 | * @mbox: Mailbox to close |
| 1526 | */ |
| 1527 | static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox) |
| 1528 | { |
| 1529 | struct tsi721_device *priv = mport->priv; |
| 1530 | u32 i; |
| 1531 | |
| 1532 | if (!priv->omsg_init[mbox]) |
| 1533 | return; |
| 1534 | priv->omsg_init[mbox] = 0; |
| 1535 | |
| 1536 | /* Disable Interrupts */ |
| 1537 | |
| 1538 | tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL); |
| 1539 | |
| 1540 | #ifdef CONFIG_PCI_MSI |
| 1541 | if (priv->flags & TSI721_USING_MSIX) { |
| 1542 | free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector, |
| 1543 | (void *)mport); |
| 1544 | free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector, |
| 1545 | (void *)mport); |
| 1546 | } |
| 1547 | #endif /* CONFIG_PCI_MSI */ |
| 1548 | |
| 1549 | /* Free OMSG Descriptor Status FIFO */ |
| 1550 | dma_free_coherent(&priv->pdev->dev, |
| 1551 | priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts), |
| 1552 | priv->omsg_ring[mbox].sts_base, |
| 1553 | priv->omsg_ring[mbox].sts_phys); |
| 1554 | |
| 1555 | priv->omsg_ring[mbox].sts_base = NULL; |
| 1556 | |
| 1557 | /* Free OMSG descriptors */ |
| 1558 | dma_free_coherent(&priv->pdev->dev, |
| 1559 | (priv->omsg_ring[mbox].size + 1) * |
| 1560 | sizeof(struct tsi721_omsg_desc), |
| 1561 | priv->omsg_ring[mbox].omd_base, |
| 1562 | priv->omsg_ring[mbox].omd_phys); |
| 1563 | |
| 1564 | priv->omsg_ring[mbox].omd_base = NULL; |
| 1565 | |
| 1566 | /* Free message buffers */ |
| 1567 | for (i = 0; i < priv->omsg_ring[mbox].size; i++) { |
| 1568 | if (priv->omsg_ring[mbox].omq_base[i]) { |
| 1569 | dma_free_coherent(&priv->pdev->dev, |
| 1570 | TSI721_MSG_BUFFER_SIZE, |
| 1571 | priv->omsg_ring[mbox].omq_base[i], |
| 1572 | priv->omsg_ring[mbox].omq_phys[i]); |
| 1573 | |
| 1574 | priv->omsg_ring[mbox].omq_base[i] = NULL; |
| 1575 | } |
| 1576 | } |
| 1577 | } |
| 1578 | |
| 1579 | /** |
| 1580 | * tsi721_imsg_handler - Inbound Message Interrupt Handler |
| 1581 | * @priv: pointer to tsi721 private data |
| 1582 | * @ch: inbound message channel number to service |
| 1583 | * |
| 1584 | * Services channel interrupts from inbound messaging engine. |
| 1585 | */ |
| 1586 | static void tsi721_imsg_handler(struct tsi721_device *priv, int ch) |
| 1587 | { |
| 1588 | u32 mbox = ch - 4; |
| 1589 | u32 imsg_int; |
| 1590 | |
| 1591 | spin_lock(&priv->imsg_ring[mbox].lock); |
| 1592 | |
| 1593 | imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch)); |
| 1594 | |
| 1595 | if (imsg_int & TSI721_IBDMAC_INT_SRTO) |
| 1596 | dev_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout\n", |
| 1597 | mbox); |
| 1598 | |
| 1599 | if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR) |
| 1600 | dev_info(&priv->pdev->dev, "IB MBOX%d PCIe error\n", |
| 1601 | mbox); |
| 1602 | |
| 1603 | if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW) |
| 1604 | dev_info(&priv->pdev->dev, |
| 1605 | "IB MBOX%d IB free queue low\n", mbox); |
| 1606 | |
| 1607 | /* Clear IB channel interrupts */ |
| 1608 | iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch)); |
| 1609 | |
| 1610 | /* If an IB Msg is received notify the upper layer */ |
| 1611 | if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV && |
| 1612 | priv->mport->inb_msg[mbox].mcback) |
| 1613 | priv->mport->inb_msg[mbox].mcback(priv->mport, |
| 1614 | priv->imsg_ring[mbox].dev_id, mbox, -1); |
| 1615 | |
| 1616 | if (!(priv->flags & TSI721_USING_MSIX)) { |
| 1617 | u32 ch_inte; |
| 1618 | |
| 1619 | /* Re-enable channel interrupts */ |
| 1620 | ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE); |
| 1621 | ch_inte |= TSI721_INT_IMSG_CHAN(ch); |
| 1622 | iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE); |
| 1623 | } |
| 1624 | |
| 1625 | spin_unlock(&priv->imsg_ring[mbox].lock); |
| 1626 | } |
| 1627 | |
| 1628 | /** |
| 1629 | * tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox |
| 1630 | * @mport: Master port implementing the Inbound Messaging Engine |
| 1631 | * @dev_id: Device specific pointer to pass on event |
| 1632 | * @mbox: Mailbox to open |
| 1633 | * @entries: Number of entries in the inbound mailbox ring |
| 1634 | */ |
| 1635 | static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id, |
| 1636 | int mbox, int entries) |
| 1637 | { |
| 1638 | struct tsi721_device *priv = mport->priv; |
| 1639 | int ch = mbox + 4; |
| 1640 | int i; |
| 1641 | u64 *free_ptr; |
| 1642 | int rc = 0; |
| 1643 | |
| 1644 | if ((entries < TSI721_IMSGD_MIN_RING_SIZE) || |
| 1645 | (entries > TSI721_IMSGD_RING_SIZE) || |
| 1646 | (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) { |
| 1647 | rc = -EINVAL; |
| 1648 | goto out; |
| 1649 | } |
| 1650 | |
| 1651 | /* Initialize IB Messaging Ring */ |
| 1652 | priv->imsg_ring[mbox].dev_id = dev_id; |
| 1653 | priv->imsg_ring[mbox].size = entries; |
| 1654 | priv->imsg_ring[mbox].rx_slot = 0; |
| 1655 | priv->imsg_ring[mbox].desc_rdptr = 0; |
| 1656 | priv->imsg_ring[mbox].fq_wrptr = 0; |
| 1657 | for (i = 0; i < priv->imsg_ring[mbox].size; i++) |
| 1658 | priv->imsg_ring[mbox].imq_base[i] = NULL; |
| 1659 | spin_lock_init(&priv->imsg_ring[mbox].lock); |
| 1660 | |
| 1661 | /* Allocate buffers for incoming messages */ |
| 1662 | priv->imsg_ring[mbox].buf_base = |
| 1663 | dma_alloc_coherent(&priv->pdev->dev, |
| 1664 | entries * TSI721_MSG_BUFFER_SIZE, |
| 1665 | &priv->imsg_ring[mbox].buf_phys, |
| 1666 | GFP_KERNEL); |
| 1667 | |
| 1668 | if (priv->imsg_ring[mbox].buf_base == NULL) { |
| 1669 | dev_err(&priv->pdev->dev, |
| 1670 | "Failed to allocate buffers for IB MBOX%d\n", mbox); |
| 1671 | rc = -ENOMEM; |
| 1672 | goto out; |
| 1673 | } |
| 1674 | |
| 1675 | /* Allocate memory for circular free list */ |
| 1676 | priv->imsg_ring[mbox].imfq_base = |
| 1677 | dma_alloc_coherent(&priv->pdev->dev, |
| 1678 | entries * 8, |
| 1679 | &priv->imsg_ring[mbox].imfq_phys, |
| 1680 | GFP_KERNEL); |
| 1681 | |
| 1682 | if (priv->imsg_ring[mbox].imfq_base == NULL) { |
| 1683 | dev_err(&priv->pdev->dev, |
| 1684 | "Failed to allocate free queue for IB MBOX%d\n", mbox); |
| 1685 | rc = -ENOMEM; |
| 1686 | goto out_buf; |
| 1687 | } |
| 1688 | |
| 1689 | /* Allocate memory for Inbound message descriptors */ |
| 1690 | priv->imsg_ring[mbox].imd_base = |
| 1691 | dma_alloc_coherent(&priv->pdev->dev, |
| 1692 | entries * sizeof(struct tsi721_imsg_desc), |
| 1693 | &priv->imsg_ring[mbox].imd_phys, GFP_KERNEL); |
| 1694 | |
| 1695 | if (priv->imsg_ring[mbox].imd_base == NULL) { |
| 1696 | dev_err(&priv->pdev->dev, |
| 1697 | "Failed to allocate descriptor memory for IB MBOX%d\n", |
| 1698 | mbox); |
| 1699 | rc = -ENOMEM; |
| 1700 | goto out_dma; |
| 1701 | } |
| 1702 | |
| 1703 | /* Fill free buffer pointer list */ |
| 1704 | free_ptr = priv->imsg_ring[mbox].imfq_base; |
| 1705 | for (i = 0; i < entries; i++) |
| 1706 | free_ptr[i] = cpu_to_le64( |
| 1707 | (u64)(priv->imsg_ring[mbox].buf_phys) + |
| 1708 | i * 0x1000); |
| 1709 | |
| 1710 | mb(); |
| 1711 | |
| 1712 | /* |
| 1713 | * For mapping of inbound SRIO Messages into appropriate queues we need |
| 1714 | * to set Inbound Device ID register in the messaging engine. We do it |
| 1715 | * once when first inbound mailbox is requested. |
| 1716 | */ |
| 1717 | if (!(priv->flags & TSI721_IMSGID_SET)) { |
| 1718 | iowrite32((u32)priv->mport->host_deviceid, |
| 1719 | priv->regs + TSI721_IB_DEVID); |
| 1720 | priv->flags |= TSI721_IMSGID_SET; |
| 1721 | } |
| 1722 | |
| 1723 | /* |
| 1724 | * Configure Inbound Messaging channel (ch = mbox + 4) |
| 1725 | */ |
| 1726 | |
| 1727 | /* Setup Inbound Message free queue */ |
| 1728 | iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32), |
| 1729 | priv->regs + TSI721_IBDMAC_FQBH(ch)); |
| 1730 | iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys & |
| 1731 | TSI721_IBDMAC_FQBL_MASK), |
| 1732 | priv->regs+TSI721_IBDMAC_FQBL(ch)); |
| 1733 | iowrite32(TSI721_DMAC_DSSZ_SIZE(entries), |
| 1734 | priv->regs + TSI721_IBDMAC_FQSZ(ch)); |
| 1735 | |
| 1736 | /* Setup Inbound Message descriptor queue */ |
| 1737 | iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32), |
| 1738 | priv->regs + TSI721_IBDMAC_DQBH(ch)); |
| 1739 | iowrite32(((u32)priv->imsg_ring[mbox].imd_phys & |
| 1740 | (u32)TSI721_IBDMAC_DQBL_MASK), |
| 1741 | priv->regs+TSI721_IBDMAC_DQBL(ch)); |
| 1742 | iowrite32(TSI721_DMAC_DSSZ_SIZE(entries), |
| 1743 | priv->regs + TSI721_IBDMAC_DQSZ(ch)); |
| 1744 | |
| 1745 | /* Enable interrupts */ |
| 1746 | |
| 1747 | #ifdef CONFIG_PCI_MSI |
| 1748 | if (priv->flags & TSI721_USING_MSIX) { |
| 1749 | /* Request interrupt service if we are in MSI-X mode */ |
| 1750 | rc = request_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector, |
| 1751 | tsi721_imsg_msix, 0, |
| 1752 | priv->msix[TSI721_VECT_IMB0_RCV + mbox].irq_name, |
| 1753 | (void *)mport); |
| 1754 | |
| 1755 | if (rc) { |
| 1756 | dev_dbg(&priv->pdev->dev, |
| 1757 | "Unable to allocate MSI-X interrupt for " |
| 1758 | "IBOX%d-DONE\n", mbox); |
| 1759 | goto out_desc; |
| 1760 | } |
| 1761 | |
| 1762 | rc = request_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector, |
| 1763 | tsi721_imsg_msix, 0, |
| 1764 | priv->msix[TSI721_VECT_IMB0_INT + mbox].irq_name, |
| 1765 | (void *)mport); |
| 1766 | |
| 1767 | if (rc) { |
| 1768 | dev_dbg(&priv->pdev->dev, |
| 1769 | "Unable to allocate MSI-X interrupt for " |
| 1770 | "IBOX%d-INT\n", mbox); |
| 1771 | free_irq( |
| 1772 | priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector, |
| 1773 | (void *)mport); |
| 1774 | goto out_desc; |
| 1775 | } |
| 1776 | } |
| 1777 | #endif /* CONFIG_PCI_MSI */ |
| 1778 | |
| 1779 | tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL); |
| 1780 | |
| 1781 | /* Initialize Inbound Message Engine */ |
| 1782 | iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch)); |
| 1783 | ioread32(priv->regs + TSI721_IBDMAC_CTL(ch)); |
| 1784 | udelay(10); |
| 1785 | priv->imsg_ring[mbox].fq_wrptr = entries - 1; |
| 1786 | iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch)); |
| 1787 | |
| 1788 | priv->imsg_init[mbox] = 1; |
| 1789 | return 0; |
| 1790 | |
| 1791 | #ifdef CONFIG_PCI_MSI |
| 1792 | out_desc: |
| 1793 | dma_free_coherent(&priv->pdev->dev, |
| 1794 | priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc), |
| 1795 | priv->imsg_ring[mbox].imd_base, |
| 1796 | priv->imsg_ring[mbox].imd_phys); |
| 1797 | |
| 1798 | priv->imsg_ring[mbox].imd_base = NULL; |
| 1799 | #endif /* CONFIG_PCI_MSI */ |
| 1800 | |
| 1801 | out_dma: |
| 1802 | dma_free_coherent(&priv->pdev->dev, |
| 1803 | priv->imsg_ring[mbox].size * 8, |
| 1804 | priv->imsg_ring[mbox].imfq_base, |
| 1805 | priv->imsg_ring[mbox].imfq_phys); |
| 1806 | |
| 1807 | priv->imsg_ring[mbox].imfq_base = NULL; |
| 1808 | |
| 1809 | out_buf: |
| 1810 | dma_free_coherent(&priv->pdev->dev, |
| 1811 | priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE, |
| 1812 | priv->imsg_ring[mbox].buf_base, |
| 1813 | priv->imsg_ring[mbox].buf_phys); |
| 1814 | |
| 1815 | priv->imsg_ring[mbox].buf_base = NULL; |
| 1816 | |
| 1817 | out: |
| 1818 | return rc; |
| 1819 | } |
| 1820 | |
| 1821 | /** |
| 1822 | * tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox |
| 1823 | * @mport: Master port implementing the Inbound Messaging Engine |
| 1824 | * @mbox: Mailbox to close |
| 1825 | */ |
| 1826 | static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox) |
| 1827 | { |
| 1828 | struct tsi721_device *priv = mport->priv; |
| 1829 | u32 rx_slot; |
| 1830 | int ch = mbox + 4; |
| 1831 | |
| 1832 | if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */ |
| 1833 | return; |
| 1834 | priv->imsg_init[mbox] = 0; |
| 1835 | |
| 1836 | /* Disable Inbound Messaging Engine */ |
| 1837 | |
| 1838 | /* Disable Interrupts */ |
| 1839 | tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK); |
| 1840 | |
| 1841 | #ifdef CONFIG_PCI_MSI |
| 1842 | if (priv->flags & TSI721_USING_MSIX) { |
| 1843 | free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector, |
| 1844 | (void *)mport); |
| 1845 | free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector, |
| 1846 | (void *)mport); |
| 1847 | } |
| 1848 | #endif /* CONFIG_PCI_MSI */ |
| 1849 | |
| 1850 | /* Clear Inbound Buffer Queue */ |
| 1851 | for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++) |
| 1852 | priv->imsg_ring[mbox].imq_base[rx_slot] = NULL; |
| 1853 | |
| 1854 | /* Free memory allocated for message buffers */ |
| 1855 | dma_free_coherent(&priv->pdev->dev, |
| 1856 | priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE, |
| 1857 | priv->imsg_ring[mbox].buf_base, |
| 1858 | priv->imsg_ring[mbox].buf_phys); |
| 1859 | |
| 1860 | priv->imsg_ring[mbox].buf_base = NULL; |
| 1861 | |
| 1862 | /* Free memory allocated for free pointr list */ |
| 1863 | dma_free_coherent(&priv->pdev->dev, |
| 1864 | priv->imsg_ring[mbox].size * 8, |
| 1865 | priv->imsg_ring[mbox].imfq_base, |
| 1866 | priv->imsg_ring[mbox].imfq_phys); |
| 1867 | |
| 1868 | priv->imsg_ring[mbox].imfq_base = NULL; |
| 1869 | |
| 1870 | /* Free memory allocated for RX descriptors */ |
| 1871 | dma_free_coherent(&priv->pdev->dev, |
| 1872 | priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc), |
| 1873 | priv->imsg_ring[mbox].imd_base, |
| 1874 | priv->imsg_ring[mbox].imd_phys); |
| 1875 | |
| 1876 | priv->imsg_ring[mbox].imd_base = NULL; |
| 1877 | } |
| 1878 | |
| 1879 | /** |
| 1880 | * tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue |
| 1881 | * @mport: Master port implementing the Inbound Messaging Engine |
| 1882 | * @mbox: Inbound mailbox number |
| 1883 | * @buf: Buffer to add to inbound queue |
| 1884 | */ |
| 1885 | static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf) |
| 1886 | { |
| 1887 | struct tsi721_device *priv = mport->priv; |
| 1888 | u32 rx_slot; |
| 1889 | int rc = 0; |
| 1890 | |
| 1891 | rx_slot = priv->imsg_ring[mbox].rx_slot; |
| 1892 | if (priv->imsg_ring[mbox].imq_base[rx_slot]) { |
| 1893 | dev_err(&priv->pdev->dev, |
| 1894 | "Error adding inbound buffer %d, buffer exists\n", |
| 1895 | rx_slot); |
| 1896 | rc = -EINVAL; |
| 1897 | goto out; |
| 1898 | } |
| 1899 | |
| 1900 | priv->imsg_ring[mbox].imq_base[rx_slot] = buf; |
| 1901 | |
| 1902 | if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size) |
| 1903 | priv->imsg_ring[mbox].rx_slot = 0; |
| 1904 | |
| 1905 | out: |
| 1906 | return rc; |
| 1907 | } |
| 1908 | |
| 1909 | /** |
| 1910 | * tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue |
| 1911 | * @mport: Master port implementing the Inbound Messaging Engine |
| 1912 | * @mbox: Inbound mailbox number |
| 1913 | * |
| 1914 | * Returns pointer to the message on success or NULL on failure. |
| 1915 | */ |
| 1916 | static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox) |
| 1917 | { |
| 1918 | struct tsi721_device *priv = mport->priv; |
| 1919 | struct tsi721_imsg_desc *desc; |
| 1920 | u32 rx_slot; |
| 1921 | void *rx_virt = NULL; |
| 1922 | u64 rx_phys; |
| 1923 | void *buf = NULL; |
| 1924 | u64 *free_ptr; |
| 1925 | int ch = mbox + 4; |
| 1926 | int msg_size; |
| 1927 | |
| 1928 | if (!priv->imsg_init[mbox]) |
| 1929 | return NULL; |
| 1930 | |
| 1931 | desc = priv->imsg_ring[mbox].imd_base; |
| 1932 | desc += priv->imsg_ring[mbox].desc_rdptr; |
| 1933 | |
| 1934 | if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO)) |
| 1935 | goto out; |
| 1936 | |
| 1937 | rx_slot = priv->imsg_ring[mbox].rx_slot; |
| 1938 | while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) { |
| 1939 | if (++rx_slot == priv->imsg_ring[mbox].size) |
| 1940 | rx_slot = 0; |
| 1941 | } |
| 1942 | |
| 1943 | rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) | |
| 1944 | le32_to_cpu(desc->bufptr_lo); |
| 1945 | |
| 1946 | rx_virt = priv->imsg_ring[mbox].buf_base + |
| 1947 | (rx_phys - (u64)priv->imsg_ring[mbox].buf_phys); |
| 1948 | |
| 1949 | buf = priv->imsg_ring[mbox].imq_base[rx_slot]; |
| 1950 | msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT; |
| 1951 | if (msg_size == 0) |
| 1952 | msg_size = RIO_MAX_MSG_SIZE; |
| 1953 | |
| 1954 | memcpy(buf, rx_virt, msg_size); |
| 1955 | priv->imsg_ring[mbox].imq_base[rx_slot] = NULL; |
| 1956 | |
| 1957 | desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO); |
| 1958 | if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size) |
| 1959 | priv->imsg_ring[mbox].desc_rdptr = 0; |
| 1960 | |
| 1961 | iowrite32(priv->imsg_ring[mbox].desc_rdptr, |
| 1962 | priv->regs + TSI721_IBDMAC_DQRP(ch)); |
| 1963 | |
| 1964 | /* Return free buffer into the pointer list */ |
| 1965 | free_ptr = priv->imsg_ring[mbox].imfq_base; |
| 1966 | free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys); |
| 1967 | |
| 1968 | if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size) |
| 1969 | priv->imsg_ring[mbox].fq_wrptr = 0; |
| 1970 | |
| 1971 | iowrite32(priv->imsg_ring[mbox].fq_wrptr, |
| 1972 | priv->regs + TSI721_IBDMAC_FQWP(ch)); |
| 1973 | out: |
| 1974 | return buf; |
| 1975 | } |
| 1976 | |
| 1977 | /** |
| 1978 | * tsi721_messages_init - Initialization of Messaging Engine |
| 1979 | * @priv: pointer to tsi721 private data |
| 1980 | * |
| 1981 | * Configures Tsi721 messaging engine. |
| 1982 | */ |
| 1983 | static int tsi721_messages_init(struct tsi721_device *priv) |
| 1984 | { |
| 1985 | int ch; |
| 1986 | |
| 1987 | iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG); |
| 1988 | iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT); |
| 1989 | iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT); |
| 1990 | |
| 1991 | /* Set SRIO Message Request/Response Timeout */ |
| 1992 | iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO); |
| 1993 | |
| 1994 | /* Initialize Inbound Messaging Engine Registers */ |
| 1995 | for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) { |
| 1996 | /* Clear interrupt bits */ |
| 1997 | iowrite32(TSI721_IBDMAC_INT_MASK, |
| 1998 | priv->regs + TSI721_IBDMAC_INT(ch)); |
| 1999 | /* Clear Status */ |
| 2000 | iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch)); |
| 2001 | |
| 2002 | iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK, |
| 2003 | priv->regs + TSI721_SMSG_ECC_COR_LOG(ch)); |
| 2004 | iowrite32(TSI721_SMSG_ECC_NCOR_MASK, |
| 2005 | priv->regs + TSI721_SMSG_ECC_NCOR(ch)); |
| 2006 | } |
| 2007 | |
| 2008 | return 0; |
| 2009 | } |
| 2010 | |
| 2011 | /** |
| 2012 | * tsi721_disable_ints - disables all device interrupts |
| 2013 | * @priv: pointer to tsi721 private data |
| 2014 | */ |
| 2015 | static void tsi721_disable_ints(struct tsi721_device *priv) |
| 2016 | { |
| 2017 | int ch; |
| 2018 | |
| 2019 | /* Disable all device level interrupts */ |
| 2020 | iowrite32(0, priv->regs + TSI721_DEV_INTE); |
| 2021 | |
| 2022 | /* Disable all Device Channel interrupts */ |
| 2023 | iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE); |
| 2024 | |
| 2025 | /* Disable all Inbound Msg Channel interrupts */ |
| 2026 | for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) |
| 2027 | iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch)); |
| 2028 | |
| 2029 | /* Disable all Outbound Msg Channel interrupts */ |
| 2030 | for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++) |
| 2031 | iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch)); |
| 2032 | |
| 2033 | /* Disable all general messaging interrupts */ |
| 2034 | iowrite32(0, priv->regs + TSI721_SMSG_INTE); |
| 2035 | |
| 2036 | /* Disable all BDMA Channel interrupts */ |
| 2037 | for (ch = 0; ch < TSI721_DMA_MAXCH; ch++) |
| 2038 | iowrite32(0, priv->regs + TSI721_DMAC_INTE(ch)); |
| 2039 | |
| 2040 | /* Disable all general BDMA interrupts */ |
| 2041 | iowrite32(0, priv->regs + TSI721_BDMA_INTE); |
| 2042 | |
| 2043 | /* Disable all SRIO Channel interrupts */ |
| 2044 | for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++) |
| 2045 | iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch)); |
| 2046 | |
| 2047 | /* Disable all general SR2PC interrupts */ |
| 2048 | iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE); |
| 2049 | |
| 2050 | /* Disable all PC2SR interrupts */ |
| 2051 | iowrite32(0, priv->regs + TSI721_PC2SR_INTE); |
| 2052 | |
| 2053 | /* Disable all I2C interrupts */ |
| 2054 | iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE); |
| 2055 | |
| 2056 | /* Disable SRIO MAC interrupts */ |
| 2057 | iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE); |
| 2058 | iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN); |
| 2059 | } |
| 2060 | |
| 2061 | /** |
| 2062 | * tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port |
| 2063 | * @priv: pointer to tsi721 private data |
| 2064 | * |
| 2065 | * Configures Tsi721 as RapidIO master port. |
| 2066 | */ |
| 2067 | static int __devinit tsi721_setup_mport(struct tsi721_device *priv) |
| 2068 | { |
| 2069 | struct pci_dev *pdev = priv->pdev; |
| 2070 | int err = 0; |
| 2071 | struct rio_ops *ops; |
| 2072 | |
| 2073 | struct rio_mport *mport; |
| 2074 | |
| 2075 | ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL); |
| 2076 | if (!ops) { |
| 2077 | dev_dbg(&pdev->dev, "Unable to allocate memory for rio_ops\n"); |
| 2078 | return -ENOMEM; |
| 2079 | } |
| 2080 | |
| 2081 | ops->lcread = tsi721_lcread; |
| 2082 | ops->lcwrite = tsi721_lcwrite; |
| 2083 | ops->cread = tsi721_cread_dma; |
| 2084 | ops->cwrite = tsi721_cwrite_dma; |
| 2085 | ops->dsend = tsi721_dsend; |
| 2086 | ops->open_inb_mbox = tsi721_open_inb_mbox; |
| 2087 | ops->close_inb_mbox = tsi721_close_inb_mbox; |
| 2088 | ops->open_outb_mbox = tsi721_open_outb_mbox; |
| 2089 | ops->close_outb_mbox = tsi721_close_outb_mbox; |
| 2090 | ops->add_outb_message = tsi721_add_outb_message; |
| 2091 | ops->add_inb_buffer = tsi721_add_inb_buffer; |
| 2092 | ops->get_inb_message = tsi721_get_inb_message; |
| 2093 | |
| 2094 | mport = kzalloc(sizeof(struct rio_mport), GFP_KERNEL); |
| 2095 | if (!mport) { |
| 2096 | kfree(ops); |
| 2097 | dev_dbg(&pdev->dev, "Unable to allocate memory for mport\n"); |
| 2098 | return -ENOMEM; |
| 2099 | } |
| 2100 | |
| 2101 | mport->ops = ops; |
| 2102 | mport->index = 0; |
| 2103 | mport->sys_size = 0; /* small system */ |
| 2104 | mport->phy_type = RIO_PHY_SERIAL; |
| 2105 | mport->priv = (void *)priv; |
| 2106 | mport->phys_efptr = 0x100; |
| 2107 | |
| 2108 | INIT_LIST_HEAD(&mport->dbells); |
| 2109 | |
| 2110 | rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff); |
Alexandre Bounine | b439e66 | 2011-12-08 14:34:36 -0800 | [diff] [blame] | 2111 | rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3); |
| 2112 | rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3); |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 2113 | strcpy(mport->name, "Tsi721 mport"); |
| 2114 | |
| 2115 | /* Hook up interrupt handler */ |
| 2116 | |
| 2117 | #ifdef CONFIG_PCI_MSI |
| 2118 | if (!tsi721_enable_msix(priv)) |
| 2119 | priv->flags |= TSI721_USING_MSIX; |
| 2120 | else if (!pci_enable_msi(pdev)) |
| 2121 | priv->flags |= TSI721_USING_MSI; |
| 2122 | else |
| 2123 | dev_info(&pdev->dev, |
| 2124 | "MSI/MSI-X is not available. Using legacy INTx.\n"); |
| 2125 | #endif /* CONFIG_PCI_MSI */ |
| 2126 | |
| 2127 | err = tsi721_request_irq(mport); |
| 2128 | |
| 2129 | if (!err) { |
| 2130 | tsi721_interrupts_init(priv); |
| 2131 | ops->pwenable = tsi721_pw_enable; |
| 2132 | } else |
| 2133 | dev_err(&pdev->dev, "Unable to get assigned PCI IRQ " |
| 2134 | "vector %02X err=0x%x\n", pdev->irq, err); |
| 2135 | |
| 2136 | /* Enable SRIO link */ |
| 2137 | iowrite32(ioread32(priv->regs + TSI721_DEVCTL) | |
| 2138 | TSI721_DEVCTL_SRBOOT_CMPL, |
| 2139 | priv->regs + TSI721_DEVCTL); |
| 2140 | |
| 2141 | rio_register_mport(mport); |
| 2142 | priv->mport = mport; |
| 2143 | |
| 2144 | if (mport->host_deviceid >= 0) |
| 2145 | iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER | |
| 2146 | RIO_PORT_GEN_DISCOVERED, |
| 2147 | priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR)); |
| 2148 | else |
| 2149 | iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR)); |
| 2150 | |
| 2151 | return 0; |
| 2152 | } |
| 2153 | |
| 2154 | static int __devinit tsi721_probe(struct pci_dev *pdev, |
| 2155 | const struct pci_device_id *id) |
| 2156 | { |
| 2157 | struct tsi721_device *priv; |
Alexandre Bounine | 1cee22b | 2011-12-08 14:34:42 -0800 | [diff] [blame] | 2158 | int i, cap; |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 2159 | int err; |
| 2160 | u32 regval; |
| 2161 | |
| 2162 | priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL); |
| 2163 | if (priv == NULL) { |
| 2164 | dev_err(&pdev->dev, "Failed to allocate memory for device\n"); |
| 2165 | err = -ENOMEM; |
| 2166 | goto err_exit; |
| 2167 | } |
| 2168 | |
| 2169 | err = pci_enable_device(pdev); |
| 2170 | if (err) { |
| 2171 | dev_err(&pdev->dev, "Failed to enable PCI device\n"); |
| 2172 | goto err_clean; |
| 2173 | } |
| 2174 | |
| 2175 | priv->pdev = pdev; |
| 2176 | |
| 2177 | #ifdef DEBUG |
| 2178 | for (i = 0; i <= PCI_STD_RESOURCE_END; i++) { |
| 2179 | dev_dbg(&pdev->dev, "res[%d] @ 0x%llx (0x%lx, 0x%lx)\n", |
| 2180 | i, (unsigned long long)pci_resource_start(pdev, i), |
| 2181 | (unsigned long)pci_resource_len(pdev, i), |
| 2182 | pci_resource_flags(pdev, i)); |
| 2183 | } |
| 2184 | #endif |
| 2185 | /* |
| 2186 | * Verify BAR configuration |
| 2187 | */ |
| 2188 | |
| 2189 | /* BAR_0 (registers) must be 512KB+ in 32-bit address space */ |
| 2190 | if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) || |
| 2191 | pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 || |
| 2192 | pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) { |
| 2193 | dev_err(&pdev->dev, |
| 2194 | "Missing or misconfigured CSR BAR0, aborting.\n"); |
| 2195 | err = -ENODEV; |
| 2196 | goto err_disable_pdev; |
| 2197 | } |
| 2198 | |
| 2199 | /* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */ |
| 2200 | if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) || |
| 2201 | pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 || |
| 2202 | pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) { |
| 2203 | dev_err(&pdev->dev, |
| 2204 | "Missing or misconfigured Doorbell BAR1, aborting.\n"); |
| 2205 | err = -ENODEV; |
| 2206 | goto err_disable_pdev; |
| 2207 | } |
| 2208 | |
| 2209 | /* |
| 2210 | * BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address |
| 2211 | * space. |
| 2212 | * NOTE: BAR_2 and BAR_4 are not used by this version of driver. |
| 2213 | * It may be a good idea to keep them disabled using HW configuration |
| 2214 | * to save PCI memory space. |
| 2215 | */ |
| 2216 | if ((pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM) && |
| 2217 | (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64)) { |
| 2218 | dev_info(&pdev->dev, "Outbound BAR2 is not used but enabled.\n"); |
| 2219 | } |
| 2220 | |
| 2221 | if ((pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM) && |
| 2222 | (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64)) { |
| 2223 | dev_info(&pdev->dev, "Outbound BAR4 is not used but enabled.\n"); |
| 2224 | } |
| 2225 | |
| 2226 | err = pci_request_regions(pdev, DRV_NAME); |
| 2227 | if (err) { |
| 2228 | dev_err(&pdev->dev, "Cannot obtain PCI resources, " |
| 2229 | "aborting.\n"); |
| 2230 | goto err_disable_pdev; |
| 2231 | } |
| 2232 | |
| 2233 | pci_set_master(pdev); |
| 2234 | |
| 2235 | priv->regs = pci_ioremap_bar(pdev, BAR_0); |
| 2236 | if (!priv->regs) { |
| 2237 | dev_err(&pdev->dev, |
| 2238 | "Unable to map device registers space, aborting\n"); |
| 2239 | err = -ENOMEM; |
| 2240 | goto err_free_res; |
| 2241 | } |
| 2242 | |
| 2243 | priv->odb_base = pci_ioremap_bar(pdev, BAR_1); |
| 2244 | if (!priv->odb_base) { |
| 2245 | dev_err(&pdev->dev, |
| 2246 | "Unable to map outbound doorbells space, aborting\n"); |
| 2247 | err = -ENOMEM; |
| 2248 | goto err_unmap_bars; |
| 2249 | } |
| 2250 | |
| 2251 | /* Configure DMA attributes. */ |
| 2252 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { |
| 2253 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { |
| 2254 | dev_info(&pdev->dev, "Unable to set DMA mask\n"); |
| 2255 | goto err_unmap_bars; |
| 2256 | } |
| 2257 | |
| 2258 | if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) |
| 2259 | dev_info(&pdev->dev, "Unable to set consistent DMA mask\n"); |
| 2260 | } else { |
| 2261 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| 2262 | if (err) |
| 2263 | dev_info(&pdev->dev, "Unable to set consistent DMA mask\n"); |
| 2264 | } |
| 2265 | |
Alexandre Bounine | 1cee22b | 2011-12-08 14:34:42 -0800 | [diff] [blame] | 2266 | cap = pci_pcie_cap(pdev); |
| 2267 | BUG_ON(cap == 0); |
| 2268 | |
| 2269 | /* Clear "no snoop" and "relaxed ordering" bits, use default MRRS. */ |
| 2270 | pci_read_config_dword(pdev, cap + PCI_EXP_DEVCTL, ®val); |
| 2271 | regval &= ~(PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_RELAX_EN | |
| 2272 | PCI_EXP_DEVCTL_NOSNOOP_EN); |
| 2273 | regval |= 0x2 << MAX_READ_REQUEST_SZ_SHIFT; |
| 2274 | pci_write_config_dword(pdev, cap + PCI_EXP_DEVCTL, regval); |
| 2275 | |
| 2276 | /* Adjust PCIe completion timeout. */ |
| 2277 | pci_read_config_dword(pdev, cap + PCI_EXP_DEVCTL2, ®val); |
| 2278 | regval &= ~(0x0f); |
| 2279 | pci_write_config_dword(pdev, cap + PCI_EXP_DEVCTL2, regval | 0x2); |
Alexandre Bounine | 48618fb | 2011-11-02 13:39:09 -0700 | [diff] [blame] | 2280 | |
| 2281 | /* |
| 2282 | * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block |
| 2283 | */ |
| 2284 | pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01); |
| 2285 | pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL, |
| 2286 | TSI721_MSIXTBL_OFFSET); |
| 2287 | pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA, |
| 2288 | TSI721_MSIXPBA_OFFSET); |
| 2289 | pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0); |
| 2290 | /* End of FIXUP */ |
| 2291 | |
| 2292 | tsi721_disable_ints(priv); |
| 2293 | |
| 2294 | tsi721_init_pc2sr_mapping(priv); |
| 2295 | tsi721_init_sr2pc_mapping(priv); |
| 2296 | |
| 2297 | if (tsi721_bdma_init(priv)) { |
| 2298 | dev_err(&pdev->dev, "BDMA initialization failed, aborting\n"); |
| 2299 | err = -ENOMEM; |
| 2300 | goto err_unmap_bars; |
| 2301 | } |
| 2302 | |
| 2303 | err = tsi721_doorbell_init(priv); |
| 2304 | if (err) |
| 2305 | goto err_free_bdma; |
| 2306 | |
| 2307 | tsi721_port_write_init(priv); |
| 2308 | |
| 2309 | err = tsi721_messages_init(priv); |
| 2310 | if (err) |
| 2311 | goto err_free_consistent; |
| 2312 | |
| 2313 | err = tsi721_setup_mport(priv); |
| 2314 | if (err) |
| 2315 | goto err_free_consistent; |
| 2316 | |
| 2317 | return 0; |
| 2318 | |
| 2319 | err_free_consistent: |
| 2320 | tsi721_doorbell_free(priv); |
| 2321 | err_free_bdma: |
| 2322 | tsi721_bdma_free(priv); |
| 2323 | err_unmap_bars: |
| 2324 | if (priv->regs) |
| 2325 | iounmap(priv->regs); |
| 2326 | if (priv->odb_base) |
| 2327 | iounmap(priv->odb_base); |
| 2328 | err_free_res: |
| 2329 | pci_release_regions(pdev); |
| 2330 | pci_clear_master(pdev); |
| 2331 | err_disable_pdev: |
| 2332 | pci_disable_device(pdev); |
| 2333 | err_clean: |
| 2334 | kfree(priv); |
| 2335 | err_exit: |
| 2336 | return err; |
| 2337 | } |
| 2338 | |
| 2339 | static DEFINE_PCI_DEVICE_TABLE(tsi721_pci_tbl) = { |
| 2340 | { PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) }, |
| 2341 | { 0, } /* terminate list */ |
| 2342 | }; |
| 2343 | |
| 2344 | MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl); |
| 2345 | |
| 2346 | static struct pci_driver tsi721_driver = { |
| 2347 | .name = "tsi721", |
| 2348 | .id_table = tsi721_pci_tbl, |
| 2349 | .probe = tsi721_probe, |
| 2350 | }; |
| 2351 | |
| 2352 | static int __init tsi721_init(void) |
| 2353 | { |
| 2354 | return pci_register_driver(&tsi721_driver); |
| 2355 | } |
| 2356 | |
| 2357 | static void __exit tsi721_exit(void) |
| 2358 | { |
| 2359 | pci_unregister_driver(&tsi721_driver); |
| 2360 | } |
| 2361 | |
| 2362 | device_initcall(tsi721_init); |