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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / drivers / rapidio / devices / tsi721.c
blobff7cbf2d28e3aca513a21999334ae01352208600
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 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(priv->mdma.ch_id);
112 struct tsi721_dma_desc *bd_ptr;
113 u32 rd_count, swr_ptr, ch_stat;
114 int i, err = 0;
115 u32 op = do_wr ? MAINT_WR : MAINT_RD;
116
117 if (offset > (RIO_MAINT_SPACE_SZ - len) || (len != sizeof(u32)))
118 return -EINVAL;
119
120 bd_ptr = priv->mdma.bd_base;
121
122 rd_count = ioread32(regs + TSI721_DMAC_DRDCNT);
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, regs + TSI721_DMAC_DWRCNT);
138 ioread32(regs + TSI721_DMAC_DWRCNT);
139 i = 0;
140
141 /* Wait until DMA transfer is finished */
142 while ((ch_stat = ioread32(regs + TSI721_DMAC_STS))
143 & TSI721_DMAC_STS_RUN) {
144 udelay(1);
145 if (++i >= 5000000) {
146 dev_dbg(&priv->pdev->dev,
147 "%s : DMA[%d] read timeout ch_status=%x\n",
148 __func__, priv->mdma.ch_id, ch_stat);
149 if (!do_wr)
150 *data = 0xffffffff;
151 err = -EIO;
152 goto err_out;
153 }
154 }
155
156 if (ch_stat & TSI721_DMAC_STS_ABORT) {
157 /* If DMA operation aborted due to error,
158 * reinitialize DMA channel
159 */
160 dev_dbg(&priv->pdev->dev, "%s : DMA ABORT ch_stat=%x\n",
161 __func__, ch_stat);
162 dev_dbg(&priv->pdev->dev, "OP=%d : destid=%x hc=%x off=%x\n",
163 do_wr ? MAINT_WR : MAINT_RD, destid, hopcount, offset);
164 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
165 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
166 udelay(10);
167 iowrite32(0, regs + TSI721_DMAC_DWRCNT);
168 udelay(1);
169 if (!do_wr)
170 *data = 0xffffffff;
171 err = -EIO;
172 goto err_out;
173 }
174
175 if (!do_wr)
176 *data = be32_to_cpu(bd_ptr[0].data[0]);
177
178 /*
179 * Update descriptor status FIFO RD pointer.
180 * NOTE: Skipping check and clear FIFO entries because we are waiting
181 * for transfer to be completed.
182 */
183 swr_ptr = ioread32(regs + TSI721_DMAC_DSWP);
184 iowrite32(swr_ptr, regs + TSI721_DMAC_DSRP);
185 err_out:
186
187 return err;
188 }
189
190 /**
191 * tsi721_cread_dma - Generate a RapidIO maintenance read transaction
192 * using Tsi721 BDMA engine.
193 * @mport: RapidIO master port control structure
194 * @index: ID of RapdiIO interface
195 * @destid: Destination ID of transaction
196 * @hopcount: Number of hops to target device
197 * @offset: Offset into configuration space
198 * @len: Length (in bytes) of the maintenance transaction
199 * @val: Location to be read into
200 *
201 * Generates a RapidIO maintenance read transaction.
202 * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
203 */
204 static int tsi721_cread_dma(struct rio_mport *mport, int index, u16 destid,
205 u8 hopcount, u32 offset, int len, u32 *data)
206 {
207 struct tsi721_device *priv = mport->priv;
208
209 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
210 offset, len, data, 0);
211 }
212
213 /**
214 * tsi721_cwrite_dma - Generate a RapidIO maintenance write transaction
215 * using Tsi721 BDMA engine
216 * @mport: RapidIO master port control structure
217 * @index: ID of RapdiIO interface
218 * @destid: Destination ID of transaction
219 * @hopcount: Number of hops to target device
220 * @offset: Offset into configuration space
221 * @len: Length (in bytes) of the maintenance transaction
222 * @val: Value to be written
223 *
224 * Generates a RapidIO maintenance write transaction.
225 * Returns %0 on success and %-EINVAL or %-EFAULT on failure.
226 */
227 static int tsi721_cwrite_dma(struct rio_mport *mport, int index, u16 destid,
228 u8 hopcount, u32 offset, int len, u32 data)
229 {
230 struct tsi721_device *priv = mport->priv;
231 u32 temp = data;
232
233 return tsi721_maint_dma(priv, mport->sys_size, destid, hopcount,
234 offset, len, &temp, 1);
235 }
236
237 /**
238 * tsi721_pw_handler - Tsi721 inbound port-write interrupt handler
239 * @mport: RapidIO master port structure
240 *
241 * Handles inbound port-write interrupts. Copies PW message from an internal
242 * buffer into PW message FIFO and schedules deferred routine to process
243 * queued messages.
244 */
245 static int
246 tsi721_pw_handler(struct rio_mport *mport)
247 {
248 struct tsi721_device *priv = mport->priv;
249 u32 pw_stat;
250 u32 pw_buf[TSI721_RIO_PW_MSG_SIZE/sizeof(u32)];
251
252
253 pw_stat = ioread32(priv->regs + TSI721_RIO_PW_RX_STAT);
254
255 if (pw_stat & TSI721_RIO_PW_RX_STAT_PW_VAL) {
256 pw_buf[0] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(0));
257 pw_buf[1] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(1));
258 pw_buf[2] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(2));
259 pw_buf[3] = ioread32(priv->regs + TSI721_RIO_PW_RX_CAPT(3));
260
261 /* Queue PW message (if there is room in FIFO),
262 * otherwise discard it.
263 */
264 spin_lock(&priv->pw_fifo_lock);
265 if (kfifo_avail(&priv->pw_fifo) >= TSI721_RIO_PW_MSG_SIZE)
266 kfifo_in(&priv->pw_fifo, pw_buf,
267 TSI721_RIO_PW_MSG_SIZE);
268 else
269 priv->pw_discard_count++;
270 spin_unlock(&priv->pw_fifo_lock);
271 }
272
273 /* Clear pending PW interrupts */
274 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
275 priv->regs + TSI721_RIO_PW_RX_STAT);
276
277 schedule_work(&priv->pw_work);
278
279 return 0;
280 }
281
282 static void tsi721_pw_dpc(struct work_struct *work)
283 {
284 struct tsi721_device *priv = container_of(work, struct tsi721_device,
285 pw_work);
286 u32 msg_buffer[RIO_PW_MSG_SIZE/sizeof(u32)]; /* Use full size PW message
287 buffer for RIO layer */
288
289 /*
290 * Process port-write messages
291 */
292 while (kfifo_out_spinlocked(&priv->pw_fifo, (unsigned char *)msg_buffer,
293 TSI721_RIO_PW_MSG_SIZE, &priv->pw_fifo_lock)) {
294 /* Process one message */
295 #ifdef DEBUG_PW
296 {
297 u32 i;
298 pr_debug("%s : Port-Write Message:", __func__);
299 for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32); ) {
300 pr_debug("0x%02x: %08x %08x %08x %08x", i*4,
301 msg_buffer[i], msg_buffer[i + 1],
302 msg_buffer[i + 2], msg_buffer[i + 3]);
303 i += 4;
304 }
305 pr_debug("\n");
306 }
307 #endif
308 /* Pass the port-write message to RIO core for processing */
309 rio_inb_pwrite_handler((union rio_pw_msg *)msg_buffer);
310 }
311 }
312
313 /**
314 * tsi721_pw_enable - enable/disable port-write interface init
315 * @mport: Master port implementing the port write unit
316 * @enable: 1=enable; 0=disable port-write message handling
317 */
318 static int tsi721_pw_enable(struct rio_mport *mport, int enable)
319 {
320 struct tsi721_device *priv = mport->priv;
321 u32 rval;
322
323 rval = ioread32(priv->regs + TSI721_RIO_EM_INT_ENABLE);
324
325 if (enable)
326 rval |= TSI721_RIO_EM_INT_ENABLE_PW_RX;
327 else
328 rval &= ~TSI721_RIO_EM_INT_ENABLE_PW_RX;
329
330 /* Clear pending PW interrupts */
331 iowrite32(TSI721_RIO_PW_RX_STAT_PW_DISC | TSI721_RIO_PW_RX_STAT_PW_VAL,
332 priv->regs + TSI721_RIO_PW_RX_STAT);
333 /* Update enable bits */
334 iowrite32(rval, priv->regs + TSI721_RIO_EM_INT_ENABLE);
335
336 return 0;
337 }
338
339 /**
340 * tsi721_dsend - Send a RapidIO doorbell
341 * @mport: RapidIO master port info
342 * @index: ID of RapidIO interface
343 * @destid: Destination ID of target device
344 * @data: 16-bit info field of RapidIO doorbell
345 *
346 * Sends a RapidIO doorbell message. Always returns %0.
347 */
348 static int tsi721_dsend(struct rio_mport *mport, int index,
349 u16 destid, u16 data)
350 {
351 struct tsi721_device *priv = mport->priv;
352 u32 offset;
353
354 offset = (((mport->sys_size) ? RIO_TT_CODE_16 : RIO_TT_CODE_8) << 18) |
355 (destid << 2);
356
357 dev_dbg(&priv->pdev->dev,
358 "Send Doorbell 0x%04x to destID 0x%x\n", data, destid);
359 iowrite16be(data, priv->odb_base + offset);
360
361 return 0;
362 }
363
364 /**
365 * tsi721_dbell_handler - Tsi721 doorbell interrupt handler
366 * @mport: RapidIO master port structure
367 *
368 * Handles inbound doorbell interrupts. Copies doorbell entry from an internal
369 * buffer into DB message FIFO and schedules deferred routine to process
370 * queued DBs.
371 */
372 static int
373 tsi721_dbell_handler(struct rio_mport *mport)
374 {
375 struct tsi721_device *priv = mport->priv;
376 u32 regval;
377
378 /* Disable IDB interrupts */
379 regval = ioread32(priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
380 regval &= ~TSI721_SR_CHINT_IDBQRCV;
381 iowrite32(regval,
382 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
383
384 schedule_work(&priv->idb_work);
385
386 return 0;
387 }
388
389 static void tsi721_db_dpc(struct work_struct *work)
390 {
391 struct tsi721_device *priv = container_of(work, struct tsi721_device,
392 idb_work);
393 struct rio_mport *mport;
394 struct rio_dbell *dbell;
395 int found = 0;
396 u32 wr_ptr, rd_ptr;
397 u64 *idb_entry;
398 u32 regval;
399 union {
400 u64 msg;
401 u8 bytes[8];
402 } idb;
403
404 /*
405 * Process queued inbound doorbells
406 */
407 mport = priv->mport;
408
409 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
410 rd_ptr = ioread32(priv->regs + TSI721_IDQ_RP(IDB_QUEUE)) % IDB_QSIZE;
411
412 while (wr_ptr != rd_ptr) {
413 idb_entry = (u64 *)(priv->idb_base +
414 (TSI721_IDB_ENTRY_SIZE * rd_ptr));
415 rd_ptr++;
416 rd_ptr %= IDB_QSIZE;
417 idb.msg = *idb_entry;
418 *idb_entry = 0;
419
420 /* Process one doorbell */
421 list_for_each_entry(dbell, &mport->dbells, node) {
422 if ((dbell->res->start <= DBELL_INF(idb.bytes)) &&
423 (dbell->res->end >= DBELL_INF(idb.bytes))) {
424 found = 1;
425 break;
426 }
427 }
428
429 if (found) {
430 dbell->dinb(mport, dbell->dev_id, DBELL_SID(idb.bytes),
431 DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
432 } else {
433 dev_dbg(&priv->pdev->dev,
434 "spurious inb doorbell, sid %2.2x tid %2.2x"
435 " info %4.4x\n", DBELL_SID(idb.bytes),
436 DBELL_TID(idb.bytes), DBELL_INF(idb.bytes));
437 }
438
439 wr_ptr = ioread32(priv->regs +
440 TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
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 wr_ptr = ioread32(priv->regs + TSI721_IDQ_WP(IDB_QUEUE)) % IDB_QSIZE;
453 if (wr_ptr != rd_ptr)
454 schedule_work(&priv->idb_work);
455 }
456
457 /**
458 * tsi721_irqhandler - Tsi721 interrupt handler
459 * @irq: Linux interrupt number
460 * @ptr: Pointer to interrupt-specific data (mport structure)
461 *
462 * Handles Tsi721 interrupts signaled using MSI and INTA. Checks reported
463 * interrupt events and calls an event-specific handler(s).
464 */
465 static irqreturn_t tsi721_irqhandler(int irq, void *ptr)
466 {
467 struct rio_mport *mport = (struct rio_mport *)ptr;
468 struct tsi721_device *priv = mport->priv;
469 u32 dev_int;
470 u32 dev_ch_int;
471 u32 intval;
472 u32 ch_inte;
473
474 /* For MSI mode disable all device-level interrupts */
475 if (priv->flags & TSI721_USING_MSI)
476 iowrite32(0, priv->regs + TSI721_DEV_INTE);
477
478 dev_int = ioread32(priv->regs + TSI721_DEV_INT);
479 if (!dev_int)
480 return IRQ_NONE;
481
482 dev_ch_int = ioread32(priv->regs + TSI721_DEV_CHAN_INT);
483
484 if (dev_int & TSI721_DEV_INT_SR2PC_CH) {
485 /* Service SR2PC Channel interrupts */
486 if (dev_ch_int & TSI721_INT_SR2PC_CHAN(IDB_QUEUE)) {
487 /* Service Inbound Doorbell interrupt */
488 intval = ioread32(priv->regs +
489 TSI721_SR_CHINT(IDB_QUEUE));
490 if (intval & TSI721_SR_CHINT_IDBQRCV)
491 tsi721_dbell_handler(mport);
492 else
493 dev_info(&priv->pdev->dev,
494 "Unsupported SR_CH_INT %x\n", intval);
495
496 /* Clear interrupts */
497 iowrite32(intval,
498 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
499 ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
500 }
501 }
502
503 if (dev_int & TSI721_DEV_INT_SMSG_CH) {
504 int ch;
505
506 /*
507 * Service channel interrupts from Messaging Engine
508 */
509
510 if (dev_ch_int & TSI721_INT_IMSG_CHAN_M) { /* Inbound Msg */
511 /* Disable signaled OB MSG Channel interrupts */
512 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
513 ch_inte &= ~(dev_ch_int & TSI721_INT_IMSG_CHAN_M);
514 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
515
516 /*
517 * Process Inbound Message interrupt for each MBOX
518 */
519 for (ch = 4; ch < RIO_MAX_MBOX + 4; ch++) {
520 if (!(dev_ch_int & TSI721_INT_IMSG_CHAN(ch)))
521 continue;
522 tsi721_imsg_handler(priv, ch);
523 }
524 }
525
526 if (dev_ch_int & TSI721_INT_OMSG_CHAN_M) { /* Outbound Msg */
527 /* Disable signaled OB MSG Channel interrupts */
528 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
529 ch_inte &= ~(dev_ch_int & TSI721_INT_OMSG_CHAN_M);
530 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
531
532 /*
533 * Process Outbound Message interrupts for each MBOX
534 */
535
536 for (ch = 0; ch < RIO_MAX_MBOX; ch++) {
537 if (!(dev_ch_int & TSI721_INT_OMSG_CHAN(ch)))
538 continue;
539 tsi721_omsg_handler(priv, ch);
540 }
541 }
542 }
543
544 if (dev_int & TSI721_DEV_INT_SRIO) {
545 /* Service SRIO MAC interrupts */
546 intval = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
547 if (intval & TSI721_RIO_EM_INT_STAT_PW_RX)
548 tsi721_pw_handler(mport);
549 }
550
551 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
552 if (dev_int & TSI721_DEV_INT_BDMA_CH) {
553 int ch;
554
555 if (dev_ch_int & TSI721_INT_BDMA_CHAN_M) {
556 dev_dbg(&priv->pdev->dev,
557 "IRQ from DMA channel 0x%08x\n", dev_ch_int);
558
559 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++) {
560 if (!(dev_ch_int & TSI721_INT_BDMA_CHAN(ch)))
561 continue;
562 tsi721_bdma_handler(&priv->bdma[ch]);
563 }
564 }
565 }
566 #endif
567
568 /* For MSI mode re-enable device-level interrupts */
569 if (priv->flags & TSI721_USING_MSI) {
570 dev_int = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
571 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
572 iowrite32(dev_int, priv->regs + TSI721_DEV_INTE);
573 }
574
575 return IRQ_HANDLED;
576 }
577
578 static void tsi721_interrupts_init(struct tsi721_device *priv)
579 {
580 u32 intr;
581
582 /* Enable IDB interrupts */
583 iowrite32(TSI721_SR_CHINT_ALL,
584 priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
585 iowrite32(TSI721_SR_CHINT_IDBQRCV,
586 priv->regs + TSI721_SR_CHINTE(IDB_QUEUE));
587
588 /* Enable SRIO MAC interrupts */
589 iowrite32(TSI721_RIO_EM_DEV_INT_EN_INT,
590 priv->regs + TSI721_RIO_EM_DEV_INT_EN);
591
592 /* Enable interrupts from channels in use */
593 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
594 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE) |
595 (TSI721_INT_BDMA_CHAN_M &
596 ~TSI721_INT_BDMA_CHAN(TSI721_DMACH_MAINT));
597 #else
598 intr = TSI721_INT_SR2PC_CHAN(IDB_QUEUE);
599 #endif
600 iowrite32(intr, priv->regs + TSI721_DEV_CHAN_INTE);
601
602 if (priv->flags & TSI721_USING_MSIX)
603 intr = TSI721_DEV_INT_SRIO;
604 else
605 intr = TSI721_DEV_INT_SR2PC_CH | TSI721_DEV_INT_SRIO |
606 TSI721_DEV_INT_SMSG_CH | TSI721_DEV_INT_BDMA_CH;
607
608 iowrite32(intr, priv->regs + TSI721_DEV_INTE);
609 ioread32(priv->regs + TSI721_DEV_INTE);
610 }
611
612 #ifdef CONFIG_PCI_MSI
613 /**
614 * tsi721_omsg_msix - MSI-X interrupt handler for outbound messaging
615 * @irq: Linux interrupt number
616 * @ptr: Pointer to interrupt-specific data (mport structure)
617 *
618 * Handles outbound messaging interrupts signaled using MSI-X.
619 */
620 static irqreturn_t tsi721_omsg_msix(int irq, void *ptr)
621 {
622 struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
623 int mbox;
624
625 mbox = (irq - priv->msix[TSI721_VECT_OMB0_DONE].vector) % RIO_MAX_MBOX;
626 tsi721_omsg_handler(priv, mbox);
627 return IRQ_HANDLED;
628 }
629
630 /**
631 * tsi721_imsg_msix - MSI-X interrupt handler for inbound messaging
632 * @irq: Linux interrupt number
633 * @ptr: Pointer to interrupt-specific data (mport structure)
634 *
635 * Handles inbound messaging interrupts signaled using MSI-X.
636 */
637 static irqreturn_t tsi721_imsg_msix(int irq, void *ptr)
638 {
639 struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
640 int mbox;
641
642 mbox = (irq - priv->msix[TSI721_VECT_IMB0_RCV].vector) % RIO_MAX_MBOX;
643 tsi721_imsg_handler(priv, mbox + 4);
644 return IRQ_HANDLED;
645 }
646
647 /**
648 * tsi721_srio_msix - Tsi721 MSI-X SRIO MAC interrupt handler
649 * @irq: Linux interrupt number
650 * @ptr: Pointer to interrupt-specific data (mport structure)
651 *
652 * Handles Tsi721 interrupts from SRIO MAC.
653 */
654 static irqreturn_t tsi721_srio_msix(int irq, void *ptr)
655 {
656 struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
657 u32 srio_int;
658
659 /* Service SRIO MAC interrupts */
660 srio_int = ioread32(priv->regs + TSI721_RIO_EM_INT_STAT);
661 if (srio_int & TSI721_RIO_EM_INT_STAT_PW_RX)
662 tsi721_pw_handler((struct rio_mport *)ptr);
663
664 return IRQ_HANDLED;
665 }
666
667 /**
668 * tsi721_sr2pc_ch_msix - Tsi721 MSI-X SR2PC Channel interrupt handler
669 * @irq: Linux interrupt number
670 * @ptr: Pointer to interrupt-specific data (mport structure)
671 *
672 * Handles Tsi721 interrupts from SR2PC Channel.
673 * NOTE: At this moment services only one SR2PC channel associated with inbound
674 * doorbells.
675 */
676 static irqreturn_t tsi721_sr2pc_ch_msix(int irq, void *ptr)
677 {
678 struct tsi721_device *priv = ((struct rio_mport *)ptr)->priv;
679 u32 sr_ch_int;
680
681 /* Service Inbound DB interrupt from SR2PC channel */
682 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
683 if (sr_ch_int & TSI721_SR_CHINT_IDBQRCV)
684 tsi721_dbell_handler((struct rio_mport *)ptr);
685
686 /* Clear interrupts */
687 iowrite32(sr_ch_int, priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
688 /* Read back to ensure that interrupt was cleared */
689 sr_ch_int = ioread32(priv->regs + TSI721_SR_CHINT(IDB_QUEUE));
690
691 return IRQ_HANDLED;
692 }
693
694 /**
695 * tsi721_request_msix - register interrupt service for MSI-X mode.
696 * @mport: RapidIO master port structure
697 *
698 * Registers MSI-X interrupt service routines for interrupts that are active
699 * immediately after mport initialization. Messaging interrupt service routines
700 * should be registered during corresponding open requests.
701 */
702 static int tsi721_request_msix(struct rio_mport *mport)
703 {
704 struct tsi721_device *priv = mport->priv;
705 int err = 0;
706
707 err = request_irq(priv->msix[TSI721_VECT_IDB].vector,
708 tsi721_sr2pc_ch_msix, 0,
709 priv->msix[TSI721_VECT_IDB].irq_name, (void *)mport);
710 if (err)
711 goto out;
712
713 err = request_irq(priv->msix[TSI721_VECT_PWRX].vector,
714 tsi721_srio_msix, 0,
715 priv->msix[TSI721_VECT_PWRX].irq_name, (void *)mport);
716 if (err)
717 free_irq(
718 priv->msix[TSI721_VECT_IDB].vector,
719 (void *)mport);
720 out:
721 return err;
722 }
723
724 /**
725 * tsi721_enable_msix - Attempts to enable MSI-X support for Tsi721.
726 * @priv: pointer to tsi721 private data
727 *
728 * Configures MSI-X support for Tsi721. Supports only an exact number
729 * of requested vectors.
730 */
731 static int tsi721_enable_msix(struct tsi721_device *priv)
732 {
733 struct msix_entry entries[TSI721_VECT_MAX];
734 int err;
735 int i;
736
737 entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE);
738 entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT;
739
740 /*
741 * Initialize MSI-X entries for Messaging Engine:
742 * this driver supports four RIO mailboxes (inbound and outbound)
743 * NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore
744 * offset +4 is added to IB MBOX number.
745 */
746 for (i = 0; i < RIO_MAX_MBOX; i++) {
747 entries[TSI721_VECT_IMB0_RCV + i].entry =
748 TSI721_MSIX_IMSG_DQ_RCV(i + 4);
749 entries[TSI721_VECT_IMB0_INT + i].entry =
750 TSI721_MSIX_IMSG_INT(i + 4);
751 entries[TSI721_VECT_OMB0_DONE + i].entry =
752 TSI721_MSIX_OMSG_DONE(i);
753 entries[TSI721_VECT_OMB0_INT + i].entry =
754 TSI721_MSIX_OMSG_INT(i);
755 }
756
757 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
758 /*
759 * Initialize MSI-X entries for Block DMA Engine:
760 * this driver supports XXX DMA channels
761 * (one is reserved for SRIO maintenance transactions)
762 */
763 for (i = 0; i < TSI721_DMA_CHNUM; i++) {
764 entries[TSI721_VECT_DMA0_DONE + i].entry =
765 TSI721_MSIX_DMACH_DONE(i);
766 entries[TSI721_VECT_DMA0_INT + i].entry =
767 TSI721_MSIX_DMACH_INT(i);
768 }
769 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
770
771 err = pci_enable_msix(priv->pdev, entries, ARRAY_SIZE(entries));
772 if (err) {
773 if (err > 0)
774 dev_info(&priv->pdev->dev,
775 "Only %d MSI-X vectors available, "
776 "not using MSI-X\n", err);
777 else
778 dev_err(&priv->pdev->dev,
779 "Failed to enable MSI-X (err=%d)\n", err);
780 return err;
781 }
782
783 /*
784 * Copy MSI-X vector information into tsi721 private structure
785 */
786 priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector;
787 snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX,
788 DRV_NAME "-idb@pci:%s", pci_name(priv->pdev));
789 priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector;
790 snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX,
791 DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev));
792
793 for (i = 0; i < RIO_MAX_MBOX; i++) {
794 priv->msix[TSI721_VECT_IMB0_RCV + i].vector =
795 entries[TSI721_VECT_IMB0_RCV + i].vector;
796 snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name,
797 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s",
798 i, pci_name(priv->pdev));
799
800 priv->msix[TSI721_VECT_IMB0_INT + i].vector =
801 entries[TSI721_VECT_IMB0_INT + i].vector;
802 snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name,
803 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s",
804 i, pci_name(priv->pdev));
805
806 priv->msix[TSI721_VECT_OMB0_DONE + i].vector =
807 entries[TSI721_VECT_OMB0_DONE + i].vector;
808 snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name,
809 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s",
810 i, pci_name(priv->pdev));
811
812 priv->msix[TSI721_VECT_OMB0_INT + i].vector =
813 entries[TSI721_VECT_OMB0_INT + i].vector;
814 snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name,
815 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s",
816 i, pci_name(priv->pdev));
817 }
818
819 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
820 for (i = 0; i < TSI721_DMA_CHNUM; i++) {
821 priv->msix[TSI721_VECT_DMA0_DONE + i].vector =
822 entries[TSI721_VECT_DMA0_DONE + i].vector;
823 snprintf(priv->msix[TSI721_VECT_DMA0_DONE + i].irq_name,
824 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmad%d@pci:%s",
825 i, pci_name(priv->pdev));
826
827 priv->msix[TSI721_VECT_DMA0_INT + i].vector =
828 entries[TSI721_VECT_DMA0_INT + i].vector;
829 snprintf(priv->msix[TSI721_VECT_DMA0_INT + i].irq_name,
830 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmai%d@pci:%s",
831 i, pci_name(priv->pdev));
832 }
833 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
834
835 return 0;
836 }
837 #endif /* CONFIG_PCI_MSI */
838
839 static int tsi721_request_irq(struct rio_mport *mport)
840 {
841 struct tsi721_device *priv = mport->priv;
842 int err;
843
844 #ifdef CONFIG_PCI_MSI
845 if (priv->flags & TSI721_USING_MSIX)
846 err = tsi721_request_msix(mport);
847 else
848 #endif
849 err = request_irq(priv->pdev->irq, tsi721_irqhandler,
850 (priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED,
851 DRV_NAME, (void *)mport);
852
853 if (err)
854 dev_err(&priv->pdev->dev,
855 "Unable to allocate interrupt, Error: %d\n", err);
856
857 return err;
858 }
859
860 /**
861 * tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO)
862 * translation regions.
863 * @priv: pointer to tsi721 private data
864 *
865 * Disables SREP translation regions.
866 */
867 static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv)
868 {
869 int i;
870
871 /* Disable all PC2SR translation windows */
872 for (i = 0; i < TSI721_OBWIN_NUM; i++)
873 iowrite32(0, priv->regs + TSI721_OBWINLB(i));
874 }
875
876 /**
877 * tsi721_rio_map_inb_mem -- Mapping inbound memory region.
878 * @mport: RapidIO master port
879 * @lstart: Local memory space start address.
880 * @rstart: RapidIO space start address.
881 * @size: The mapping region size.
882 * @flags: Flags for mapping. 0 for using default flags.
883 *
884 * Return: 0 -- Success.
885 *
886 * This function will create the inbound mapping
887 * from rstart to lstart.
888 */
889 static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
890 u64 rstart, u32 size, u32 flags)
891 {
892 struct tsi721_device *priv = mport->priv;
893 int i;
894 u32 regval;
895
896 if (!is_power_of_2(size) || size < 0x1000 ||
897 ((u64)lstart & (size - 1)) || (rstart & (size - 1)))
898 return -EINVAL;
899
900 /* Search for free inbound translation window */
901 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
902 regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
903 if (!(regval & TSI721_IBWIN_LB_WEN))
904 break;
905 }
906
907 if (i >= TSI721_IBWIN_NUM) {
908 dev_err(&priv->pdev->dev,
909 "Unable to find free inbound window\n");
910 return -EBUSY;
911 }
912
913 iowrite32(TSI721_IBWIN_SIZE(size) << 8,
914 priv->regs + TSI721_IBWIN_SZ(i));
915
916 iowrite32(((u64)lstart >> 32), priv->regs + TSI721_IBWIN_TUA(i));
917 iowrite32(((u64)lstart & TSI721_IBWIN_TLA_ADD),
918 priv->regs + TSI721_IBWIN_TLA(i));
919
920 iowrite32(rstart >> 32, priv->regs + TSI721_IBWIN_UB(i));
921 iowrite32((rstart & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
922 priv->regs + TSI721_IBWIN_LB(i));
923 dev_dbg(&priv->pdev->dev,
924 "Configured IBWIN%d mapping (RIO_0x%llx -> PCIe_0x%llx)\n",
925 i, rstart, (unsigned long long)lstart);
926
927 return 0;
928 }
929
930 /**
931 * fsl_rio_unmap_inb_mem -- Unmapping inbound memory region.
932 * @mport: RapidIO master port
933 * @lstart: Local memory space start address.
934 */
935 static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
936 dma_addr_t lstart)
937 {
938 struct tsi721_device *priv = mport->priv;
939 int i;
940 u64 addr;
941 u32 regval;
942
943 /* Search for matching active inbound translation window */
944 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
945 regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
946 if (regval & TSI721_IBWIN_LB_WEN) {
947 regval = ioread32(priv->regs + TSI721_IBWIN_TUA(i));
948 addr = (u64)regval << 32;
949 regval = ioread32(priv->regs + TSI721_IBWIN_TLA(i));
950 addr |= regval & TSI721_IBWIN_TLA_ADD;
951
952 if (addr == (u64)lstart) {
953 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
954 break;
955 }
956 }
957 }
958 }
959
960 /**
961 * tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe)
962 * translation regions.
963 * @priv: pointer to tsi721 private data
964 *
965 * Disables inbound windows.
966 */
967 static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv)
968 {
969 int i;
970
971 /* Disable all SR2PC inbound windows */
972 for (i = 0; i < TSI721_IBWIN_NUM; i++)
973 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
974 }
975
976 /**
977 * tsi721_port_write_init - Inbound port write interface init
978 * @priv: pointer to tsi721 private data
979 *
980 * Initializes inbound port write handler.
981 * Returns %0 on success or %-ENOMEM on failure.
982 */
983 static int tsi721_port_write_init(struct tsi721_device *priv)
984 {
985 priv->pw_discard_count = 0;
986 INIT_WORK(&priv->pw_work, tsi721_pw_dpc);
987 spin_lock_init(&priv->pw_fifo_lock);
988 if (kfifo_alloc(&priv->pw_fifo,
989 TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) {
990 dev_err(&priv->pdev->dev, "PW FIFO allocation failed\n");
991 return -ENOMEM;
992 }
993
994 /* Use reliable port-write capture mode */
995 iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL);
996 return 0;
997 }
998
999 static int tsi721_doorbell_init(struct tsi721_device *priv)
1000 {
1001 /* Outbound Doorbells do not require any setup.
1002 * Tsi721 uses dedicated PCI BAR1 to generate doorbells.
1003 * That BAR1 was mapped during the probe routine.
1004 */
1005
1006 /* Initialize Inbound Doorbell processing DPC and queue */
1007 priv->db_discard_count = 0;
1008 INIT_WORK(&priv->idb_work, tsi721_db_dpc);
1009
1010 /* Allocate buffer for inbound doorbells queue */
1011 priv->idb_base = dma_zalloc_coherent(&priv->pdev->dev,
1012 IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1013 &priv->idb_dma, GFP_KERNEL);
1014 if (!priv->idb_base)
1015 return -ENOMEM;
1016
1017 dev_dbg(&priv->pdev->dev, "Allocated IDB buffer @ %p (phys = %llx)\n",
1018 priv->idb_base, (unsigned long long)priv->idb_dma);
1019
1020 iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE),
1021 priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE));
1022 iowrite32(((u64)priv->idb_dma >> 32),
1023 priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE));
1024 iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR),
1025 priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE));
1026 /* Enable accepting all inbound doorbells */
1027 iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE));
1028
1029 iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE));
1030
1031 iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
1032
1033 return 0;
1034 }
1035
1036 static void tsi721_doorbell_free(struct tsi721_device *priv)
1037 {
1038 if (priv->idb_base == NULL)
1039 return;
1040
1041 /* Free buffer allocated for inbound doorbell queue */
1042 dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1043 priv->idb_base, priv->idb_dma);
1044 priv->idb_base = NULL;
1045 }
1046
1047 /**
1048 * tsi721_bdma_maint_init - Initialize maintenance request BDMA channel.
1049 * @priv: pointer to tsi721 private data
1050 *
1051 * Initialize BDMA channel allocated for RapidIO maintenance read/write
1052 * request generation
1053 * Returns %0 on success or %-ENOMEM on failure.
1054 */
1055 static int tsi721_bdma_maint_init(struct tsi721_device *priv)
1056 {
1057 struct tsi721_dma_desc *bd_ptr;
1058 u64 *sts_ptr;
1059 dma_addr_t bd_phys, sts_phys;
1060 int sts_size;
1061 int bd_num = 2;
1062 void __iomem *regs;
1063
1064 dev_dbg(&priv->pdev->dev,
1065 "Init Block DMA Engine for Maintenance requests, CH%d\n",
1066 TSI721_DMACH_MAINT);
1067
1068 /*
1069 * Initialize DMA channel for maintenance requests
1070 */
1071
1072 priv->mdma.ch_id = TSI721_DMACH_MAINT;
1073 regs = priv->regs + TSI721_DMAC_BASE(TSI721_DMACH_MAINT);
1074
1075 /* Allocate space for DMA descriptors */
1076 bd_ptr = dma_zalloc_coherent(&priv->pdev->dev,
1077 bd_num * sizeof(struct tsi721_dma_desc),
1078 &bd_phys, GFP_KERNEL);
1079 if (!bd_ptr)
1080 return -ENOMEM;
1081
1082 priv->mdma.bd_num = bd_num;
1083 priv->mdma.bd_phys = bd_phys;
1084 priv->mdma.bd_base = bd_ptr;
1085
1086 dev_dbg(&priv->pdev->dev, "DMA descriptors @ %p (phys = %llx)\n",
1087 bd_ptr, (unsigned long long)bd_phys);
1088
1089 /* Allocate space for descriptor status FIFO */
1090 sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ?
1091 bd_num : TSI721_DMA_MINSTSSZ;
1092 sts_size = roundup_pow_of_two(sts_size);
1093 sts_ptr = dma_zalloc_coherent(&priv->pdev->dev,
1094 sts_size * sizeof(struct tsi721_dma_sts),
1095 &sts_phys, GFP_KERNEL);
1096 if (!sts_ptr) {
1097 /* Free space allocated for DMA descriptors */
1098 dma_free_coherent(&priv->pdev->dev,
1099 bd_num * sizeof(struct tsi721_dma_desc),
1100 bd_ptr, bd_phys);
1101 priv->mdma.bd_base = NULL;
1102 return -ENOMEM;
1103 }
1104
1105 priv->mdma.sts_phys = sts_phys;
1106 priv->mdma.sts_base = sts_ptr;
1107 priv->mdma.sts_size = sts_size;
1108
1109 dev_dbg(&priv->pdev->dev,
1110 "desc status FIFO @ %p (phys = %llx) size=0x%x\n",
1111 sts_ptr, (unsigned long long)sts_phys, sts_size);
1112
1113 /* Initialize DMA descriptors ring */
1114 bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29);
1115 bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys &
1116 TSI721_DMAC_DPTRL_MASK);
1117 bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32);
1118
1119 /* Setup DMA descriptor pointers */
1120 iowrite32(((u64)bd_phys >> 32), regs + TSI721_DMAC_DPTRH);
1121 iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK),
1122 regs + TSI721_DMAC_DPTRL);
1123
1124 /* Setup descriptor status FIFO */
1125 iowrite32(((u64)sts_phys >> 32), regs + TSI721_DMAC_DSBH);
1126 iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK),
1127 regs + TSI721_DMAC_DSBL);
1128 iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size),
1129 regs + TSI721_DMAC_DSSZ);
1130
1131 /* Clear interrupt bits */
1132 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
1133
1134 ioread32(regs + TSI721_DMAC_INT);
1135
1136 /* Toggle DMA channel initialization */
1137 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1138 ioread32(regs + TSI721_DMAC_CTL);
1139 udelay(10);
1140
1141 return 0;
1142 }
1143
1144 static int tsi721_bdma_maint_free(struct tsi721_device *priv)
1145 {
1146 u32 ch_stat;
1147 struct tsi721_bdma_maint *mdma = &priv->mdma;
1148 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(mdma->ch_id);
1149
1150 if (mdma->bd_base == NULL)
1151 return 0;
1152
1153 /* Check if DMA channel still running */
1154 ch_stat = ioread32(regs + TSI721_DMAC_STS);
1155 if (ch_stat & TSI721_DMAC_STS_RUN)
1156 return -EFAULT;
1157
1158 /* Put DMA channel into init state */
1159 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1160
1161 /* Free space allocated for DMA descriptors */
1162 dma_free_coherent(&priv->pdev->dev,
1163 mdma->bd_num * sizeof(struct tsi721_dma_desc),
1164 mdma->bd_base, mdma->bd_phys);
1165 mdma->bd_base = NULL;
1166
1167 /* Free space allocated for status FIFO */
1168 dma_free_coherent(&priv->pdev->dev,
1169 mdma->sts_size * sizeof(struct tsi721_dma_sts),
1170 mdma->sts_base, mdma->sts_phys);
1171 mdma->sts_base = NULL;
1172 return 0;
1173 }
1174
1175 /* Enable Inbound Messaging Interrupts */
1176 static void
1177 tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch,
1178 u32 inte_mask)
1179 {
1180 u32 rval;
1181
1182 if (!inte_mask)
1183 return;
1184
1185 /* Clear pending Inbound Messaging interrupts */
1186 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1187
1188 /* Enable Inbound Messaging interrupts */
1189 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1190 iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch));
1191
1192 if (priv->flags & TSI721_USING_MSIX)
1193 return; /* Finished if we are in MSI-X mode */
1194
1195 /*
1196 * For MSI and INTA interrupt signalling we need to enable next levels
1197 */
1198
1199 /* Enable Device Channel Interrupt */
1200 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1201 iowrite32(rval | TSI721_INT_IMSG_CHAN(ch),
1202 priv->regs + TSI721_DEV_CHAN_INTE);
1203 }
1204
1205 /* Disable Inbound Messaging Interrupts */
1206 static void
1207 tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch,
1208 u32 inte_mask)
1209 {
1210 u32 rval;
1211
1212 if (!inte_mask)
1213 return;
1214
1215 /* Clear pending Inbound Messaging interrupts */
1216 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1217
1218 /* Disable Inbound Messaging interrupts */
1219 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1220 rval &= ~inte_mask;
1221 iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch));
1222
1223 if (priv->flags & TSI721_USING_MSIX)
1224 return; /* Finished if we are in MSI-X mode */
1225
1226 /*
1227 * For MSI and INTA interrupt signalling we need to disable next levels
1228 */
1229
1230 /* Disable Device Channel Interrupt */
1231 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1232 rval &= ~TSI721_INT_IMSG_CHAN(ch);
1233 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1234 }
1235
1236 /* Enable Outbound Messaging interrupts */
1237 static void
1238 tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch,
1239 u32 inte_mask)
1240 {
1241 u32 rval;
1242
1243 if (!inte_mask)
1244 return;
1245
1246 /* Clear pending Outbound Messaging interrupts */
1247 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1248
1249 /* Enable Outbound Messaging channel interrupts */
1250 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1251 iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch));
1252
1253 if (priv->flags & TSI721_USING_MSIX)
1254 return; /* Finished if we are in MSI-X mode */
1255
1256 /*
1257 * For MSI and INTA interrupt signalling we need to enable next levels
1258 */
1259
1260 /* Enable Device Channel Interrupt */
1261 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1262 iowrite32(rval | TSI721_INT_OMSG_CHAN(ch),
1263 priv->regs + TSI721_DEV_CHAN_INTE);
1264 }
1265
1266 /* Disable Outbound Messaging interrupts */
1267 static void
1268 tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch,
1269 u32 inte_mask)
1270 {
1271 u32 rval;
1272
1273 if (!inte_mask)
1274 return;
1275
1276 /* Clear pending Outbound Messaging interrupts */
1277 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1278
1279 /* Disable Outbound Messaging interrupts */
1280 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1281 rval &= ~inte_mask;
1282 iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch));
1283
1284 if (priv->flags & TSI721_USING_MSIX)
1285 return; /* Finished if we are in MSI-X mode */
1286
1287 /*
1288 * For MSI and INTA interrupt signalling we need to disable next levels
1289 */
1290
1291 /* Disable Device Channel Interrupt */
1292 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1293 rval &= ~TSI721_INT_OMSG_CHAN(ch);
1294 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1295 }
1296
1297 /**
1298 * tsi721_add_outb_message - Add message to the Tsi721 outbound message queue
1299 * @mport: Master port with outbound message queue
1300 * @rdev: Target of outbound message
1301 * @mbox: Outbound mailbox
1302 * @buffer: Message to add to outbound queue
1303 * @len: Length of message
1304 */
1305 static int
1306 tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
1307 void *buffer, size_t len)
1308 {
1309 struct tsi721_device *priv = mport->priv;
1310 struct tsi721_omsg_desc *desc;
1311 u32 tx_slot;
1312
1313 if (!priv->omsg_init[mbox] ||
1314 len > TSI721_MSG_MAX_SIZE || len < 8)
1315 return -EINVAL;
1316
1317 tx_slot = priv->omsg_ring[mbox].tx_slot;
1318
1319 /* Copy copy message into transfer buffer */
1320 memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len);
1321
1322 if (len & 0x7)
1323 len += 8;
1324
1325 /* Build descriptor associated with buffer */
1326 desc = priv->omsg_ring[mbox].omd_base;
1327 desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid);
1328 if (tx_slot % 4 == 0)
1329 desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF);
1330
1331 desc[tx_slot].msg_info =
1332 cpu_to_le32((mport->sys_size << 26) | (mbox << 22) |
1333 (0xe << 12) | (len & 0xff8));
1334 desc[tx_slot].bufptr_lo =
1335 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] &
1336 0xffffffff);
1337 desc[tx_slot].bufptr_hi =
1338 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32);
1339
1340 priv->omsg_ring[mbox].wr_count++;
1341
1342 /* Go to next descriptor */
1343 if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) {
1344 priv->omsg_ring[mbox].tx_slot = 0;
1345 /* Move through the ring link descriptor at the end */
1346 priv->omsg_ring[mbox].wr_count++;
1347 }
1348
1349 mb();
1350
1351 /* Set new write count value */
1352 iowrite32(priv->omsg_ring[mbox].wr_count,
1353 priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1354 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1355
1356 return 0;
1357 }
1358
1359 /**
1360 * tsi721_omsg_handler - Outbound Message Interrupt Handler
1361 * @priv: pointer to tsi721 private data
1362 * @ch: number of OB MSG channel to service
1363 *
1364 * Services channel interrupts from outbound messaging engine.
1365 */
1366 static void tsi721_omsg_handler(struct tsi721_device *priv, int ch)
1367 {
1368 u32 omsg_int;
1369
1370 spin_lock(&priv->omsg_ring[ch].lock);
1371
1372 omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch));
1373
1374 if (omsg_int & TSI721_OBDMAC_INT_ST_FULL)
1375 dev_info(&priv->pdev->dev,
1376 "OB MBOX%d: Status FIFO is full\n", ch);
1377
1378 if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) {
1379 u32 srd_ptr;
1380 u64 *sts_ptr, last_ptr = 0, prev_ptr = 0;
1381 int i, j;
1382 u32 tx_slot;
1383
1384 /*
1385 * Find last successfully processed descriptor
1386 */
1387
1388 /* Check and clear descriptor status FIFO entries */
1389 srd_ptr = priv->omsg_ring[ch].sts_rdptr;
1390 sts_ptr = priv->omsg_ring[ch].sts_base;
1391 j = srd_ptr * 8;
1392 while (sts_ptr[j]) {
1393 for (i = 0; i < 8 && sts_ptr[j]; i++, j++) {
1394 prev_ptr = last_ptr;
1395 last_ptr = le64_to_cpu(sts_ptr[j]);
1396 sts_ptr[j] = 0;
1397 }
1398
1399 ++srd_ptr;
1400 srd_ptr %= priv->omsg_ring[ch].sts_size;
1401 j = srd_ptr * 8;
1402 }
1403
1404 if (last_ptr == 0)
1405 goto no_sts_update;
1406
1407 priv->omsg_ring[ch].sts_rdptr = srd_ptr;
1408 iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch));
1409
1410 if (!priv->mport->outb_msg[ch].mcback)
1411 goto no_sts_update;
1412
1413 /* Inform upper layer about transfer completion */
1414
1415 tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/
1416 sizeof(struct tsi721_omsg_desc);
1417
1418 /*
1419 * Check if this is a Link Descriptor (LD).
1420 * If yes, ignore LD and use descriptor processed
1421 * before LD.
1422 */
1423 if (tx_slot == priv->omsg_ring[ch].size) {
1424 if (prev_ptr)
1425 tx_slot = (prev_ptr -
1426 (u64)priv->omsg_ring[ch].omd_phys)/
1427 sizeof(struct tsi721_omsg_desc);
1428 else
1429 goto no_sts_update;
1430 }
1431
1432 /* Move slot index to the next message to be sent */
1433 ++tx_slot;
1434 if (tx_slot == priv->omsg_ring[ch].size)
1435 tx_slot = 0;
1436 BUG_ON(tx_slot >= priv->omsg_ring[ch].size);
1437 priv->mport->outb_msg[ch].mcback(priv->mport,
1438 priv->omsg_ring[ch].dev_id, ch,
1439 tx_slot);
1440 }
1441
1442 no_sts_update:
1443
1444 if (omsg_int & TSI721_OBDMAC_INT_ERROR) {
1445 /*
1446 * Outbound message operation aborted due to error,
1447 * reinitialize OB MSG channel
1448 */
1449
1450 dev_dbg(&priv->pdev->dev, "OB MSG ABORT ch_stat=%x\n",
1451 ioread32(priv->regs + TSI721_OBDMAC_STS(ch)));
1452
1453 iowrite32(TSI721_OBDMAC_INT_ERROR,
1454 priv->regs + TSI721_OBDMAC_INT(ch));
1455 iowrite32(TSI721_OBDMAC_CTL_INIT,
1456 priv->regs + TSI721_OBDMAC_CTL(ch));
1457 ioread32(priv->regs + TSI721_OBDMAC_CTL(ch));
1458
1459 /* Inform upper level to clear all pending tx slots */
1460 if (priv->mport->outb_msg[ch].mcback)
1461 priv->mport->outb_msg[ch].mcback(priv->mport,
1462 priv->omsg_ring[ch].dev_id, ch,
1463 priv->omsg_ring[ch].tx_slot);
1464 /* Synch tx_slot tracking */
1465 iowrite32(priv->omsg_ring[ch].tx_slot,
1466 priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1467 ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1468 priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot;
1469 priv->omsg_ring[ch].sts_rdptr = 0;
1470 }
1471
1472 /* Clear channel interrupts */
1473 iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch));
1474
1475 if (!(priv->flags & TSI721_USING_MSIX)) {
1476 u32 ch_inte;
1477
1478 /* Re-enable channel interrupts */
1479 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1480 ch_inte |= TSI721_INT_OMSG_CHAN(ch);
1481 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1482 }
1483
1484 spin_unlock(&priv->omsg_ring[ch].lock);
1485 }
1486
1487 /**
1488 * tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox
1489 * @mport: Master port implementing Outbound Messaging Engine
1490 * @dev_id: Device specific pointer to pass on event
1491 * @mbox: Mailbox to open
1492 * @entries: Number of entries in the outbound mailbox ring
1493 */
1494 static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id,
1495 int mbox, int entries)
1496 {
1497 struct tsi721_device *priv = mport->priv;
1498 struct tsi721_omsg_desc *bd_ptr;
1499 int i, rc = 0;
1500
1501 if ((entries < TSI721_OMSGD_MIN_RING_SIZE) ||
1502 (entries > (TSI721_OMSGD_RING_SIZE)) ||
1503 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1504 rc = -EINVAL;
1505 goto out;
1506 }
1507
1508 priv->omsg_ring[mbox].dev_id = dev_id;
1509 priv->omsg_ring[mbox].size = entries;
1510 priv->omsg_ring[mbox].sts_rdptr = 0;
1511 spin_lock_init(&priv->omsg_ring[mbox].lock);
1512
1513 /* Outbound Msg Buffer allocation based on
1514 the number of maximum descriptor entries */
1515 for (i = 0; i < entries; i++) {
1516 priv->omsg_ring[mbox].omq_base[i] =
1517 dma_alloc_coherent(
1518 &priv->pdev->dev, TSI721_MSG_BUFFER_SIZE,
1519 &priv->omsg_ring[mbox].omq_phys[i],
1520 GFP_KERNEL);
1521 if (priv->omsg_ring[mbox].omq_base[i] == NULL) {
1522 dev_dbg(&priv->pdev->dev,
1523 "Unable to allocate OB MSG data buffer for"
1524 " MBOX%d\n", mbox);
1525 rc = -ENOMEM;
1526 goto out_buf;
1527 }
1528 }
1529
1530 /* Outbound message descriptor allocation */
1531 priv->omsg_ring[mbox].omd_base = dma_alloc_coherent(
1532 &priv->pdev->dev,
1533 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1534 &priv->omsg_ring[mbox].omd_phys, GFP_KERNEL);
1535 if (priv->omsg_ring[mbox].omd_base == NULL) {
1536 dev_dbg(&priv->pdev->dev,
1537 "Unable to allocate OB MSG descriptor memory "
1538 "for MBOX%d\n", mbox);
1539 rc = -ENOMEM;
1540 goto out_buf;
1541 }
1542
1543 priv->omsg_ring[mbox].tx_slot = 0;
1544
1545 /* Outbound message descriptor status FIFO allocation */
1546 priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1);
1547 priv->omsg_ring[mbox].sts_base = dma_zalloc_coherent(&priv->pdev->dev,
1548 priv->omsg_ring[mbox].sts_size *
1549 sizeof(struct tsi721_dma_sts),
1550 &priv->omsg_ring[mbox].sts_phys, GFP_KERNEL);
1551 if (priv->omsg_ring[mbox].sts_base == NULL) {
1552 dev_dbg(&priv->pdev->dev,
1553 "Unable to allocate OB MSG descriptor status FIFO "
1554 "for MBOX%d\n", mbox);
1555 rc = -ENOMEM;
1556 goto out_desc;
1557 }
1558
1559 /*
1560 * Configure Outbound Messaging Engine
1561 */
1562
1563 /* Setup Outbound Message descriptor pointer */
1564 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32),
1565 priv->regs + TSI721_OBDMAC_DPTRH(mbox));
1566 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys &
1567 TSI721_OBDMAC_DPTRL_MASK),
1568 priv->regs + TSI721_OBDMAC_DPTRL(mbox));
1569
1570 /* Setup Outbound Message descriptor status FIFO */
1571 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32),
1572 priv->regs + TSI721_OBDMAC_DSBH(mbox));
1573 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys &
1574 TSI721_OBDMAC_DSBL_MASK),
1575 priv->regs + TSI721_OBDMAC_DSBL(mbox));
1576 iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size),
1577 priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox));
1578
1579 /* Enable interrupts */
1580
1581 #ifdef CONFIG_PCI_MSI
1582 if (priv->flags & TSI721_USING_MSIX) {
1583 /* Request interrupt service if we are in MSI-X mode */
1584 rc = request_irq(
1585 priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1586 tsi721_omsg_msix, 0,
1587 priv->msix[TSI721_VECT_OMB0_DONE + mbox].irq_name,
1588 (void *)mport);
1589
1590 if (rc) {
1591 dev_dbg(&priv->pdev->dev,
1592 "Unable to allocate MSI-X interrupt for "
1593 "OBOX%d-DONE\n", mbox);
1594 goto out_stat;
1595 }
1596
1597 rc = request_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
1598 tsi721_omsg_msix, 0,
1599 priv->msix[TSI721_VECT_OMB0_INT + mbox].irq_name,
1600 (void *)mport);
1601
1602 if (rc) {
1603 dev_dbg(&priv->pdev->dev,
1604 "Unable to allocate MSI-X interrupt for "
1605 "MBOX%d-INT\n", mbox);
1606 free_irq(
1607 priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1608 (void *)mport);
1609 goto out_stat;
1610 }
1611 }
1612 #endif /* CONFIG_PCI_MSI */
1613
1614 tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL);
1615
1616 /* Initialize Outbound Message descriptors ring */
1617 bd_ptr = priv->omsg_ring[mbox].omd_base;
1618 bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29);
1619 bd_ptr[entries].msg_info = 0;
1620 bd_ptr[entries].next_lo =
1621 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys &
1622 TSI721_OBDMAC_DPTRL_MASK);
1623 bd_ptr[entries].next_hi =
1624 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32);
1625 priv->omsg_ring[mbox].wr_count = 0;
1626 mb();
1627
1628 /* Initialize Outbound Message engine */
1629 iowrite32(TSI721_OBDMAC_CTL_INIT, priv->regs + TSI721_OBDMAC_CTL(mbox));
1630 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1631 udelay(10);
1632
1633 priv->omsg_init[mbox] = 1;
1634
1635 return 0;
1636
1637 #ifdef CONFIG_PCI_MSI
1638 out_stat:
1639 dma_free_coherent(&priv->pdev->dev,
1640 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1641 priv->omsg_ring[mbox].sts_base,
1642 priv->omsg_ring[mbox].sts_phys);
1643
1644 priv->omsg_ring[mbox].sts_base = NULL;
1645 #endif /* CONFIG_PCI_MSI */
1646
1647 out_desc:
1648 dma_free_coherent(&priv->pdev->dev,
1649 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1650 priv->omsg_ring[mbox].omd_base,
1651 priv->omsg_ring[mbox].omd_phys);
1652
1653 priv->omsg_ring[mbox].omd_base = NULL;
1654
1655 out_buf:
1656 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
1657 if (priv->omsg_ring[mbox].omq_base[i]) {
1658 dma_free_coherent(&priv->pdev->dev,
1659 TSI721_MSG_BUFFER_SIZE,
1660 priv->omsg_ring[mbox].omq_base[i],
1661 priv->omsg_ring[mbox].omq_phys[i]);
1662
1663 priv->omsg_ring[mbox].omq_base[i] = NULL;
1664 }
1665 }
1666
1667 out:
1668 return rc;
1669 }
1670
1671 /**
1672 * tsi721_close_outb_mbox - Close Tsi721 outbound mailbox
1673 * @mport: Master port implementing the outbound message unit
1674 * @mbox: Mailbox to close
1675 */
1676 static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox)
1677 {
1678 struct tsi721_device *priv = mport->priv;
1679 u32 i;
1680
1681 if (!priv->omsg_init[mbox])
1682 return;
1683 priv->omsg_init[mbox] = 0;
1684
1685 /* Disable Interrupts */
1686
1687 tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL);
1688
1689 #ifdef CONFIG_PCI_MSI
1690 if (priv->flags & TSI721_USING_MSIX) {
1691 free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1692 (void *)mport);
1693 free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
1694 (void *)mport);
1695 }
1696 #endif /* CONFIG_PCI_MSI */
1697
1698 /* Free OMSG Descriptor Status FIFO */
1699 dma_free_coherent(&priv->pdev->dev,
1700 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1701 priv->omsg_ring[mbox].sts_base,
1702 priv->omsg_ring[mbox].sts_phys);
1703
1704 priv->omsg_ring[mbox].sts_base = NULL;
1705
1706 /* Free OMSG descriptors */
1707 dma_free_coherent(&priv->pdev->dev,
1708 (priv->omsg_ring[mbox].size + 1) *
1709 sizeof(struct tsi721_omsg_desc),
1710 priv->omsg_ring[mbox].omd_base,
1711 priv->omsg_ring[mbox].omd_phys);
1712
1713 priv->omsg_ring[mbox].omd_base = NULL;
1714
1715 /* Free message buffers */
1716 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
1717 if (priv->omsg_ring[mbox].omq_base[i]) {
1718 dma_free_coherent(&priv->pdev->dev,
1719 TSI721_MSG_BUFFER_SIZE,
1720 priv->omsg_ring[mbox].omq_base[i],
1721 priv->omsg_ring[mbox].omq_phys[i]);
1722
1723 priv->omsg_ring[mbox].omq_base[i] = NULL;
1724 }
1725 }
1726 }
1727
1728 /**
1729 * tsi721_imsg_handler - Inbound Message Interrupt Handler
1730 * @priv: pointer to tsi721 private data
1731 * @ch: inbound message channel number to service
1732 *
1733 * Services channel interrupts from inbound messaging engine.
1734 */
1735 static void tsi721_imsg_handler(struct tsi721_device *priv, int ch)
1736 {
1737 u32 mbox = ch - 4;
1738 u32 imsg_int;
1739
1740 spin_lock(&priv->imsg_ring[mbox].lock);
1741
1742 imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch));
1743
1744 if (imsg_int & TSI721_IBDMAC_INT_SRTO)
1745 dev_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout\n",
1746 mbox);
1747
1748 if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR)
1749 dev_info(&priv->pdev->dev, "IB MBOX%d PCIe error\n",
1750 mbox);
1751
1752 if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW)
1753 dev_info(&priv->pdev->dev,
1754 "IB MBOX%d IB free queue low\n", mbox);
1755
1756 /* Clear IB channel interrupts */
1757 iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch));
1758
1759 /* If an IB Msg is received notify the upper layer */
1760 if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV &&
1761 priv->mport->inb_msg[mbox].mcback)
1762 priv->mport->inb_msg[mbox].mcback(priv->mport,
1763 priv->imsg_ring[mbox].dev_id, mbox, -1);
1764
1765 if (!(priv->flags & TSI721_USING_MSIX)) {
1766 u32 ch_inte;
1767
1768 /* Re-enable channel interrupts */
1769 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1770 ch_inte |= TSI721_INT_IMSG_CHAN(ch);
1771 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1772 }
1773
1774 spin_unlock(&priv->imsg_ring[mbox].lock);
1775 }
1776
1777 /**
1778 * tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox
1779 * @mport: Master port implementing the Inbound Messaging Engine
1780 * @dev_id: Device specific pointer to pass on event
1781 * @mbox: Mailbox to open
1782 * @entries: Number of entries in the inbound mailbox ring
1783 */
1784 static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id,
1785 int mbox, int entries)
1786 {
1787 struct tsi721_device *priv = mport->priv;
1788 int ch = mbox + 4;
1789 int i;
1790 u64 *free_ptr;
1791 int rc = 0;
1792
1793 if ((entries < TSI721_IMSGD_MIN_RING_SIZE) ||
1794 (entries > TSI721_IMSGD_RING_SIZE) ||
1795 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1796 rc = -EINVAL;
1797 goto out;
1798 }
1799
1800 /* Initialize IB Messaging Ring */
1801 priv->imsg_ring[mbox].dev_id = dev_id;
1802 priv->imsg_ring[mbox].size = entries;
1803 priv->imsg_ring[mbox].rx_slot = 0;
1804 priv->imsg_ring[mbox].desc_rdptr = 0;
1805 priv->imsg_ring[mbox].fq_wrptr = 0;
1806 for (i = 0; i < priv->imsg_ring[mbox].size; i++)
1807 priv->imsg_ring[mbox].imq_base[i] = NULL;
1808 spin_lock_init(&priv->imsg_ring[mbox].lock);
1809
1810 /* Allocate buffers for incoming messages */
1811 priv->imsg_ring[mbox].buf_base =
1812 dma_alloc_coherent(&priv->pdev->dev,
1813 entries * TSI721_MSG_BUFFER_SIZE,
1814 &priv->imsg_ring[mbox].buf_phys,
1815 GFP_KERNEL);
1816
1817 if (priv->imsg_ring[mbox].buf_base == NULL) {
1818 dev_err(&priv->pdev->dev,
1819 "Failed to allocate buffers for IB MBOX%d\n", mbox);
1820 rc = -ENOMEM;
1821 goto out;
1822 }
1823
1824 /* Allocate memory for circular free list */
1825 priv->imsg_ring[mbox].imfq_base =
1826 dma_alloc_coherent(&priv->pdev->dev,
1827 entries * 8,
1828 &priv->imsg_ring[mbox].imfq_phys,
1829 GFP_KERNEL);
1830
1831 if (priv->imsg_ring[mbox].imfq_base == NULL) {
1832 dev_err(&priv->pdev->dev,
1833 "Failed to allocate free queue for IB MBOX%d\n", mbox);
1834 rc = -ENOMEM;
1835 goto out_buf;
1836 }
1837
1838 /* Allocate memory for Inbound message descriptors */
1839 priv->imsg_ring[mbox].imd_base =
1840 dma_alloc_coherent(&priv->pdev->dev,
1841 entries * sizeof(struct tsi721_imsg_desc),
1842 &priv->imsg_ring[mbox].imd_phys, GFP_KERNEL);
1843
1844 if (priv->imsg_ring[mbox].imd_base == NULL) {
1845 dev_err(&priv->pdev->dev,
1846 "Failed to allocate descriptor memory for IB MBOX%d\n",
1847 mbox);
1848 rc = -ENOMEM;
1849 goto out_dma;
1850 }
1851
1852 /* Fill free buffer pointer list */
1853 free_ptr = priv->imsg_ring[mbox].imfq_base;
1854 for (i = 0; i < entries; i++)
1855 free_ptr[i] = cpu_to_le64(
1856 (u64)(priv->imsg_ring[mbox].buf_phys) +
1857 i * 0x1000);
1858
1859 mb();
1860
1861 /*
1862 * For mapping of inbound SRIO Messages into appropriate queues we need
1863 * to set Inbound Device ID register in the messaging engine. We do it
1864 * once when first inbound mailbox is requested.
1865 */
1866 if (!(priv->flags & TSI721_IMSGID_SET)) {
1867 iowrite32((u32)priv->mport->host_deviceid,
1868 priv->regs + TSI721_IB_DEVID);
1869 priv->flags |= TSI721_IMSGID_SET;
1870 }
1871
1872 /*
1873 * Configure Inbound Messaging channel (ch = mbox + 4)
1874 */
1875
1876 /* Setup Inbound Message free queue */
1877 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32),
1878 priv->regs + TSI721_IBDMAC_FQBH(ch));
1879 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys &
1880 TSI721_IBDMAC_FQBL_MASK),
1881 priv->regs+TSI721_IBDMAC_FQBL(ch));
1882 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
1883 priv->regs + TSI721_IBDMAC_FQSZ(ch));
1884
1885 /* Setup Inbound Message descriptor queue */
1886 iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32),
1887 priv->regs + TSI721_IBDMAC_DQBH(ch));
1888 iowrite32(((u32)priv->imsg_ring[mbox].imd_phys &
1889 (u32)TSI721_IBDMAC_DQBL_MASK),
1890 priv->regs+TSI721_IBDMAC_DQBL(ch));
1891 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
1892 priv->regs + TSI721_IBDMAC_DQSZ(ch));
1893
1894 /* Enable interrupts */
1895
1896 #ifdef CONFIG_PCI_MSI
1897 if (priv->flags & TSI721_USING_MSIX) {
1898 /* Request interrupt service if we are in MSI-X mode */
1899 rc = request_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1900 tsi721_imsg_msix, 0,
1901 priv->msix[TSI721_VECT_IMB0_RCV + mbox].irq_name,
1902 (void *)mport);
1903
1904 if (rc) {
1905 dev_dbg(&priv->pdev->dev,
1906 "Unable to allocate MSI-X interrupt for "
1907 "IBOX%d-DONE\n", mbox);
1908 goto out_desc;
1909 }
1910
1911 rc = request_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
1912 tsi721_imsg_msix, 0,
1913 priv->msix[TSI721_VECT_IMB0_INT + mbox].irq_name,
1914 (void *)mport);
1915
1916 if (rc) {
1917 dev_dbg(&priv->pdev->dev,
1918 "Unable to allocate MSI-X interrupt for "
1919 "IBOX%d-INT\n", mbox);
1920 free_irq(
1921 priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1922 (void *)mport);
1923 goto out_desc;
1924 }
1925 }
1926 #endif /* CONFIG_PCI_MSI */
1927
1928 tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL);
1929
1930 /* Initialize Inbound Message Engine */
1931 iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch));
1932 ioread32(priv->regs + TSI721_IBDMAC_CTL(ch));
1933 udelay(10);
1934 priv->imsg_ring[mbox].fq_wrptr = entries - 1;
1935 iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch));
1936
1937 priv->imsg_init[mbox] = 1;
1938 return 0;
1939
1940 #ifdef CONFIG_PCI_MSI
1941 out_desc:
1942 dma_free_coherent(&priv->pdev->dev,
1943 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
1944 priv->imsg_ring[mbox].imd_base,
1945 priv->imsg_ring[mbox].imd_phys);
1946
1947 priv->imsg_ring[mbox].imd_base = NULL;
1948 #endif /* CONFIG_PCI_MSI */
1949
1950 out_dma:
1951 dma_free_coherent(&priv->pdev->dev,
1952 priv->imsg_ring[mbox].size * 8,
1953 priv->imsg_ring[mbox].imfq_base,
1954 priv->imsg_ring[mbox].imfq_phys);
1955
1956 priv->imsg_ring[mbox].imfq_base = NULL;
1957
1958 out_buf:
1959 dma_free_coherent(&priv->pdev->dev,
1960 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
1961 priv->imsg_ring[mbox].buf_base,
1962 priv->imsg_ring[mbox].buf_phys);
1963
1964 priv->imsg_ring[mbox].buf_base = NULL;
1965
1966 out:
1967 return rc;
1968 }
1969
1970 /**
1971 * tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox
1972 * @mport: Master port implementing the Inbound Messaging Engine
1973 * @mbox: Mailbox to close
1974 */
1975 static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox)
1976 {
1977 struct tsi721_device *priv = mport->priv;
1978 u32 rx_slot;
1979 int ch = mbox + 4;
1980
1981 if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */
1982 return;
1983 priv->imsg_init[mbox] = 0;
1984
1985 /* Disable Inbound Messaging Engine */
1986
1987 /* Disable Interrupts */
1988 tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK);
1989
1990 #ifdef CONFIG_PCI_MSI
1991 if (priv->flags & TSI721_USING_MSIX) {
1992 free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1993 (void *)mport);
1994 free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
1995 (void *)mport);
1996 }
1997 #endif /* CONFIG_PCI_MSI */
1998
1999 /* Clear Inbound Buffer Queue */
2000 for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++)
2001 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
2002
2003 /* Free memory allocated for message buffers */
2004 dma_free_coherent(&priv->pdev->dev,
2005 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
2006 priv->imsg_ring[mbox].buf_base,
2007 priv->imsg_ring[mbox].buf_phys);
2008
2009 priv->imsg_ring[mbox].buf_base = NULL;
2010
2011 /* Free memory allocated for free pointr list */
2012 dma_free_coherent(&priv->pdev->dev,
2013 priv->imsg_ring[mbox].size * 8,
2014 priv->imsg_ring[mbox].imfq_base,
2015 priv->imsg_ring[mbox].imfq_phys);
2016
2017 priv->imsg_ring[mbox].imfq_base = NULL;
2018
2019 /* Free memory allocated for RX descriptors */
2020 dma_free_coherent(&priv->pdev->dev,
2021 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
2022 priv->imsg_ring[mbox].imd_base,
2023 priv->imsg_ring[mbox].imd_phys);
2024
2025 priv->imsg_ring[mbox].imd_base = NULL;
2026 }
2027
2028 /**
2029 * tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue
2030 * @mport: Master port implementing the Inbound Messaging Engine
2031 * @mbox: Inbound mailbox number
2032 * @buf: Buffer to add to inbound queue
2033 */
2034 static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
2035 {
2036 struct tsi721_device *priv = mport->priv;
2037 u32 rx_slot;
2038 int rc = 0;
2039
2040 rx_slot = priv->imsg_ring[mbox].rx_slot;
2041 if (priv->imsg_ring[mbox].imq_base[rx_slot]) {
2042 dev_err(&priv->pdev->dev,
2043 "Error adding inbound buffer %d, buffer exists\n",
2044 rx_slot);
2045 rc = -EINVAL;
2046 goto out;
2047 }
2048
2049 priv->imsg_ring[mbox].imq_base[rx_slot] = buf;
2050
2051 if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size)
2052 priv->imsg_ring[mbox].rx_slot = 0;
2053
2054 out:
2055 return rc;
2056 }
2057
2058 /**
2059 * tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue
2060 * @mport: Master port implementing the Inbound Messaging Engine
2061 * @mbox: Inbound mailbox number
2062 *
2063 * Returns pointer to the message on success or NULL on failure.
2064 */
2065 static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox)
2066 {
2067 struct tsi721_device *priv = mport->priv;
2068 struct tsi721_imsg_desc *desc;
2069 u32 rx_slot;
2070 void *rx_virt = NULL;
2071 u64 rx_phys;
2072 void *buf = NULL;
2073 u64 *free_ptr;
2074 int ch = mbox + 4;
2075 int msg_size;
2076
2077 if (!priv->imsg_init[mbox])
2078 return NULL;
2079
2080 desc = priv->imsg_ring[mbox].imd_base;
2081 desc += priv->imsg_ring[mbox].desc_rdptr;
2082
2083 if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO))
2084 goto out;
2085
2086 rx_slot = priv->imsg_ring[mbox].rx_slot;
2087 while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) {
2088 if (++rx_slot == priv->imsg_ring[mbox].size)
2089 rx_slot = 0;
2090 }
2091
2092 rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) |
2093 le32_to_cpu(desc->bufptr_lo);
2094
2095 rx_virt = priv->imsg_ring[mbox].buf_base +
2096 (rx_phys - (u64)priv->imsg_ring[mbox].buf_phys);
2097
2098 buf = priv->imsg_ring[mbox].imq_base[rx_slot];
2099 msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT;
2100 if (msg_size == 0)
2101 msg_size = RIO_MAX_MSG_SIZE;
2102
2103 memcpy(buf, rx_virt, msg_size);
2104 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
2105
2106 desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO);
2107 if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size)
2108 priv->imsg_ring[mbox].desc_rdptr = 0;
2109
2110 iowrite32(priv->imsg_ring[mbox].desc_rdptr,
2111 priv->regs + TSI721_IBDMAC_DQRP(ch));
2112
2113 /* Return free buffer into the pointer list */
2114 free_ptr = priv->imsg_ring[mbox].imfq_base;
2115 free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys);
2116
2117 if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size)
2118 priv->imsg_ring[mbox].fq_wrptr = 0;
2119
2120 iowrite32(priv->imsg_ring[mbox].fq_wrptr,
2121 priv->regs + TSI721_IBDMAC_FQWP(ch));
2122 out:
2123 return buf;
2124 }
2125
2126 /**
2127 * tsi721_messages_init - Initialization of Messaging Engine
2128 * @priv: pointer to tsi721 private data
2129 *
2130 * Configures Tsi721 messaging engine.
2131 */
2132 static int tsi721_messages_init(struct tsi721_device *priv)
2133 {
2134 int ch;
2135
2136 iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG);
2137 iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT);
2138 iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT);
2139
2140 /* Set SRIO Message Request/Response Timeout */
2141 iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO);
2142
2143 /* Initialize Inbound Messaging Engine Registers */
2144 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) {
2145 /* Clear interrupt bits */
2146 iowrite32(TSI721_IBDMAC_INT_MASK,
2147 priv->regs + TSI721_IBDMAC_INT(ch));
2148 /* Clear Status */
2149 iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch));
2150
2151 iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK,
2152 priv->regs + TSI721_SMSG_ECC_COR_LOG(ch));
2153 iowrite32(TSI721_SMSG_ECC_NCOR_MASK,
2154 priv->regs + TSI721_SMSG_ECC_NCOR(ch));
2155 }
2156
2157 return 0;
2158 }
2159
2160 /**
2161 * tsi721_disable_ints - disables all device interrupts
2162 * @priv: pointer to tsi721 private data
2163 */
2164 static void tsi721_disable_ints(struct tsi721_device *priv)
2165 {
2166 int ch;
2167
2168 /* Disable all device level interrupts */
2169 iowrite32(0, priv->regs + TSI721_DEV_INTE);
2170
2171 /* Disable all Device Channel interrupts */
2172 iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE);
2173
2174 /* Disable all Inbound Msg Channel interrupts */
2175 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++)
2176 iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch));
2177
2178 /* Disable all Outbound Msg Channel interrupts */
2179 for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++)
2180 iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch));
2181
2182 /* Disable all general messaging interrupts */
2183 iowrite32(0, priv->regs + TSI721_SMSG_INTE);
2184
2185 /* Disable all BDMA Channel interrupts */
2186 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++)
2187 iowrite32(0,
2188 priv->regs + TSI721_DMAC_BASE(ch) + TSI721_DMAC_INTE);
2189
2190 /* Disable all general BDMA interrupts */
2191 iowrite32(0, priv->regs + TSI721_BDMA_INTE);
2192
2193 /* Disable all SRIO Channel interrupts */
2194 for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++)
2195 iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch));
2196
2197 /* Disable all general SR2PC interrupts */
2198 iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE);
2199
2200 /* Disable all PC2SR interrupts */
2201 iowrite32(0, priv->regs + TSI721_PC2SR_INTE);
2202
2203 /* Disable all I2C interrupts */
2204 iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE);
2205
2206 /* Disable SRIO MAC interrupts */
2207 iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE);
2208 iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN);
2209 }
2210
2211 /**
2212 * tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port
2213 * @priv: pointer to tsi721 private data
2214 *
2215 * Configures Tsi721 as RapidIO master port.
2216 */
2217 static int tsi721_setup_mport(struct tsi721_device *priv)
2218 {
2219 struct pci_dev *pdev = priv->pdev;
2220 int err = 0;
2221 struct rio_ops *ops;
2222
2223 struct rio_mport *mport;
2224
2225 ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL);
2226 if (!ops) {
2227 dev_dbg(&pdev->dev, "Unable to allocate memory for rio_ops\n");
2228 return -ENOMEM;
2229 }
2230
2231 ops->lcread = tsi721_lcread;
2232 ops->lcwrite = tsi721_lcwrite;
2233 ops->cread = tsi721_cread_dma;
2234 ops->cwrite = tsi721_cwrite_dma;
2235 ops->dsend = tsi721_dsend;
2236 ops->open_inb_mbox = tsi721_open_inb_mbox;
2237 ops->close_inb_mbox = tsi721_close_inb_mbox;
2238 ops->open_outb_mbox = tsi721_open_outb_mbox;
2239 ops->close_outb_mbox = tsi721_close_outb_mbox;
2240 ops->add_outb_message = tsi721_add_outb_message;
2241 ops->add_inb_buffer = tsi721_add_inb_buffer;
2242 ops->get_inb_message = tsi721_get_inb_message;
2243 ops->map_inb = tsi721_rio_map_inb_mem;
2244 ops->unmap_inb = tsi721_rio_unmap_inb_mem;
2245
2246 mport = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
2247 if (!mport) {
2248 kfree(ops);
2249 dev_dbg(&pdev->dev, "Unable to allocate memory for mport\n");
2250 return -ENOMEM;
2251 }
2252
2253 mport->ops = ops;
2254 mport->index = 0;
2255 mport->sys_size = 0; /* small system */
2256 mport->phy_type = RIO_PHY_SERIAL;
2257 mport->priv = (void *)priv;
2258 mport->phys_efptr = 0x100;
2259 priv->mport = mport;
2260
2261 INIT_LIST_HEAD(&mport->dbells);
2262
2263 rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
2264 rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3);
2265 rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3);
2266 snprintf(mport->name, RIO_MAX_MPORT_NAME, "%s(%s)",
2267 dev_driver_string(&pdev->dev), dev_name(&pdev->dev));
2268
2269 /* Hook up interrupt handler */
2270
2271 #ifdef CONFIG_PCI_MSI
2272 if (!tsi721_enable_msix(priv))
2273 priv->flags |= TSI721_USING_MSIX;
2274 else if (!pci_enable_msi(pdev))
2275 priv->flags |= TSI721_USING_MSI;
2276 else
2277 dev_info(&pdev->dev,
2278 "MSI/MSI-X is not available. Using legacy INTx.\n");
2279 #endif /* CONFIG_PCI_MSI */
2280
2281 err = tsi721_request_irq(mport);
2282
2283 if (!err) {
2284 tsi721_interrupts_init(priv);
2285 ops->pwenable = tsi721_pw_enable;
2286 } else {
2287 dev_err(&pdev->dev, "Unable to get assigned PCI IRQ "
2288 "vector %02X err=0x%x\n", pdev->irq, err);
2289 goto err_exit;
2290 }
2291
2292 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
2293 tsi721_register_dma(priv);
2294 #endif
2295 /* Enable SRIO link */
2296 iowrite32(ioread32(priv->regs + TSI721_DEVCTL) |
2297 TSI721_DEVCTL_SRBOOT_CMPL,
2298 priv->regs + TSI721_DEVCTL);
2299
2300 rio_register_mport(mport);
2301
2302 if (mport->host_deviceid >= 0)
2303 iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER |
2304 RIO_PORT_GEN_DISCOVERED,
2305 priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2306 else
2307 iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2308
2309 return 0;
2310
2311 err_exit:
2312 kfree(mport);
2313 kfree(ops);
2314 return err;
2315 }
2316
2317 static int tsi721_probe(struct pci_dev *pdev,
2318 const struct pci_device_id *id)
2319 {
2320 struct tsi721_device *priv;
2321 int err;
2322
2323 priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL);
2324 if (priv == NULL) {
2325 dev_err(&pdev->dev, "Failed to allocate memory for device\n");
2326 err = -ENOMEM;
2327 goto err_exit;
2328 }
2329
2330 err = pci_enable_device(pdev);
2331 if (err) {
2332 dev_err(&pdev->dev, "Failed to enable PCI device\n");
2333 goto err_clean;
2334 }
2335
2336 priv->pdev = pdev;
2337
2338 #ifdef DEBUG
2339 {
2340 int i;
2341 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
2342 dev_dbg(&pdev->dev, "res[%d] @ 0x%llx (0x%lx, 0x%lx)\n",
2343 i, (unsigned long long)pci_resource_start(pdev, i),
2344 (unsigned long)pci_resource_len(pdev, i),
2345 pci_resource_flags(pdev, i));
2346 }
2347 }
2348 #endif
2349 /*
2350 * Verify BAR configuration
2351 */
2352
2353 /* BAR_0 (registers) must be 512KB+ in 32-bit address space */
2354 if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) ||
2355 pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 ||
2356 pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) {
2357 dev_err(&pdev->dev,
2358 "Missing or misconfigured CSR BAR0, aborting.\n");
2359 err = -ENODEV;
2360 goto err_disable_pdev;
2361 }
2362
2363 /* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */
2364 if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) ||
2365 pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 ||
2366 pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) {
2367 dev_err(&pdev->dev,
2368 "Missing or misconfigured Doorbell BAR1, aborting.\n");
2369 err = -ENODEV;
2370 goto err_disable_pdev;
2371 }
2372
2373 /*
2374 * BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address
2375 * space.
2376 * NOTE: BAR_2 and BAR_4 are not used by this version of driver.
2377 * It may be a good idea to keep them disabled using HW configuration
2378 * to save PCI memory space.
2379 */
2380 if ((pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM) &&
2381 (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64)) {
2382 dev_info(&pdev->dev, "Outbound BAR2 is not used but enabled.\n");
2383 }
2384
2385 if ((pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM) &&
2386 (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64)) {
2387 dev_info(&pdev->dev, "Outbound BAR4 is not used but enabled.\n");
2388 }
2389
2390 err = pci_request_regions(pdev, DRV_NAME);
2391 if (err) {
2392 dev_err(&pdev->dev, "Cannot obtain PCI resources, "
2393 "aborting.\n");
2394 goto err_disable_pdev;
2395 }
2396
2397 pci_set_master(pdev);
2398
2399 priv->regs = pci_ioremap_bar(pdev, BAR_0);
2400 if (!priv->regs) {
2401 dev_err(&pdev->dev,
2402 "Unable to map device registers space, aborting\n");
2403 err = -ENOMEM;
2404 goto err_free_res;
2405 }
2406
2407 priv->odb_base = pci_ioremap_bar(pdev, BAR_1);
2408 if (!priv->odb_base) {
2409 dev_err(&pdev->dev,
2410 "Unable to map outbound doorbells space, aborting\n");
2411 err = -ENOMEM;
2412 goto err_unmap_bars;
2413 }
2414
2415 /* Configure DMA attributes. */
2416 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
2417 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2418 if (err) {
2419 dev_info(&pdev->dev, "Unable to set DMA mask\n");
2420 goto err_unmap_bars;
2421 }
2422
2423 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2424 dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
2425 } else {
2426 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2427 if (err)
2428 dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
2429 }
2430
2431 BUG_ON(!pci_is_pcie(pdev));
2432
2433 /* Clear "no snoop" and "relaxed ordering" bits, use default MRRS. */
2434 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
2435 PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_RELAX_EN |
2436 PCI_EXP_DEVCTL_NOSNOOP_EN,
2437 0x2 << MAX_READ_REQUEST_SZ_SHIFT);
2438
2439 /* Adjust PCIe completion timeout. */
2440 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL2, 0xf, 0x2);
2441
2442 /*
2443 * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block
2444 */
2445 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01);
2446 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL,
2447 TSI721_MSIXTBL_OFFSET);
2448 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA,
2449 TSI721_MSIXPBA_OFFSET);
2450 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0);
2451 /* End of FIXUP */
2452
2453 tsi721_disable_ints(priv);
2454
2455 tsi721_init_pc2sr_mapping(priv);
2456 tsi721_init_sr2pc_mapping(priv);
2457
2458 if (tsi721_bdma_maint_init(priv)) {
2459 dev_err(&pdev->dev, "BDMA initialization failed, aborting\n");
2460 err = -ENOMEM;
2461 goto err_unmap_bars;
2462 }
2463
2464 err = tsi721_doorbell_init(priv);
2465 if (err)
2466 goto err_free_bdma;
2467
2468 tsi721_port_write_init(priv);
2469
2470 err = tsi721_messages_init(priv);
2471 if (err)
2472 goto err_free_consistent;
2473
2474 err = tsi721_setup_mport(priv);
2475 if (err)
2476 goto err_free_consistent;
2477
2478 return 0;
2479
2480 err_free_consistent:
2481 tsi721_doorbell_free(priv);
2482 err_free_bdma:
2483 tsi721_bdma_maint_free(priv);
2484 err_unmap_bars:
2485 if (priv->regs)
2486 iounmap(priv->regs);
2487 if (priv->odb_base)
2488 iounmap(priv->odb_base);
2489 err_free_res:
2490 pci_release_regions(pdev);
2491 pci_clear_master(pdev);
2492 err_disable_pdev:
2493 pci_disable_device(pdev);
2494 err_clean:
2495 kfree(priv);
2496 err_exit:
2497 return err;
2498 }
2499
2500 static DEFINE_PCI_DEVICE_TABLE(tsi721_pci_tbl) = {
2501 { PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) },
2502 { 0, } /* terminate list */
2503 };
2504
2505 MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl);
2506
2507 static struct pci_driver tsi721_driver = {
2508 .name = "tsi721",
2509 .id_table = tsi721_pci_tbl,
2510 .probe = tsi721_probe,
2511 };
2512
2513 static int __init tsi721_init(void)
2514 {
2515 return pci_register_driver(&tsi721_driver);
2516 }
2517
2518 device_initcall(tsi721_init);
2519
2520 MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver");
2521 MODULE_AUTHOR("Integrated Device Technology, Inc.");
2522 MODULE_LICENSE("GPL");
Linux with added FPC-III support