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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / rapidio / devices / tsi721.c
blobeeca70ddbf61e1cd8c7331d54c51c842ddc784fd
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_exact(priv->pdev, entries, ARRAY_SIZE(entries));
772 if (err) {
773 dev_err(&priv->pdev->dev,
774 "Failed to enable MSI-X (err=%d)\n", err);
775 return err;
776 }
777
778 /*
779 * Copy MSI-X vector information into tsi721 private structure
780 */
781 priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector;
782 snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX,
783 DRV_NAME "-idb@pci:%s", pci_name(priv->pdev));
784 priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector;
785 snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX,
786 DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev));
787
788 for (i = 0; i < RIO_MAX_MBOX; i++) {
789 priv->msix[TSI721_VECT_IMB0_RCV + i].vector =
790 entries[TSI721_VECT_IMB0_RCV + i].vector;
791 snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name,
792 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s",
793 i, pci_name(priv->pdev));
794
795 priv->msix[TSI721_VECT_IMB0_INT + i].vector =
796 entries[TSI721_VECT_IMB0_INT + i].vector;
797 snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name,
798 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s",
799 i, pci_name(priv->pdev));
800
801 priv->msix[TSI721_VECT_OMB0_DONE + i].vector =
802 entries[TSI721_VECT_OMB0_DONE + i].vector;
803 snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name,
804 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s",
805 i, pci_name(priv->pdev));
806
807 priv->msix[TSI721_VECT_OMB0_INT + i].vector =
808 entries[TSI721_VECT_OMB0_INT + i].vector;
809 snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name,
810 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s",
811 i, pci_name(priv->pdev));
812 }
813
814 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
815 for (i = 0; i < TSI721_DMA_CHNUM; i++) {
816 priv->msix[TSI721_VECT_DMA0_DONE + i].vector =
817 entries[TSI721_VECT_DMA0_DONE + i].vector;
818 snprintf(priv->msix[TSI721_VECT_DMA0_DONE + i].irq_name,
819 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmad%d@pci:%s",
820 i, pci_name(priv->pdev));
821
822 priv->msix[TSI721_VECT_DMA0_INT + i].vector =
823 entries[TSI721_VECT_DMA0_INT + i].vector;
824 snprintf(priv->msix[TSI721_VECT_DMA0_INT + i].irq_name,
825 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmai%d@pci:%s",
826 i, pci_name(priv->pdev));
827 }
828 #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
829
830 return 0;
831 }
832 #endif /* CONFIG_PCI_MSI */
833
834 static int tsi721_request_irq(struct rio_mport *mport)
835 {
836 struct tsi721_device *priv = mport->priv;
837 int err;
838
839 #ifdef CONFIG_PCI_MSI
840 if (priv->flags & TSI721_USING_MSIX)
841 err = tsi721_request_msix(mport);
842 else
843 #endif
844 err = request_irq(priv->pdev->irq, tsi721_irqhandler,
845 (priv->flags & TSI721_USING_MSI) ? 0 : IRQF_SHARED,
846 DRV_NAME, (void *)mport);
847
848 if (err)
849 dev_err(&priv->pdev->dev,
850 "Unable to allocate interrupt, Error: %d\n", err);
851
852 return err;
853 }
854
855 /**
856 * tsi721_init_pc2sr_mapping - initializes outbound (PCIe->SRIO)
857 * translation regions.
858 * @priv: pointer to tsi721 private data
859 *
860 * Disables SREP translation regions.
861 */
862 static void tsi721_init_pc2sr_mapping(struct tsi721_device *priv)
863 {
864 int i;
865
866 /* Disable all PC2SR translation windows */
867 for (i = 0; i < TSI721_OBWIN_NUM; i++)
868 iowrite32(0, priv->regs + TSI721_OBWINLB(i));
869 }
870
871 /**
872 * tsi721_rio_map_inb_mem -- Mapping inbound memory region.
873 * @mport: RapidIO master port
874 * @lstart: Local memory space start address.
875 * @rstart: RapidIO space start address.
876 * @size: The mapping region size.
877 * @flags: Flags for mapping. 0 for using default flags.
878 *
879 * Return: 0 -- Success.
880 *
881 * This function will create the inbound mapping
882 * from rstart to lstart.
883 */
884 static int tsi721_rio_map_inb_mem(struct rio_mport *mport, dma_addr_t lstart,
885 u64 rstart, u32 size, u32 flags)
886 {
887 struct tsi721_device *priv = mport->priv;
888 int i;
889 u32 regval;
890
891 if (!is_power_of_2(size) || size < 0x1000 ||
892 ((u64)lstart & (size - 1)) || (rstart & (size - 1)))
893 return -EINVAL;
894
895 /* Search for free inbound translation window */
896 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
897 regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
898 if (!(regval & TSI721_IBWIN_LB_WEN))
899 break;
900 }
901
902 if (i >= TSI721_IBWIN_NUM) {
903 dev_err(&priv->pdev->dev,
904 "Unable to find free inbound window\n");
905 return -EBUSY;
906 }
907
908 iowrite32(TSI721_IBWIN_SIZE(size) << 8,
909 priv->regs + TSI721_IBWIN_SZ(i));
910
911 iowrite32(((u64)lstart >> 32), priv->regs + TSI721_IBWIN_TUA(i));
912 iowrite32(((u64)lstart & TSI721_IBWIN_TLA_ADD),
913 priv->regs + TSI721_IBWIN_TLA(i));
914
915 iowrite32(rstart >> 32, priv->regs + TSI721_IBWIN_UB(i));
916 iowrite32((rstart & TSI721_IBWIN_LB_BA) | TSI721_IBWIN_LB_WEN,
917 priv->regs + TSI721_IBWIN_LB(i));
918 dev_dbg(&priv->pdev->dev,
919 "Configured IBWIN%d mapping (RIO_0x%llx -> PCIe_0x%llx)\n",
920 i, rstart, (unsigned long long)lstart);
921
922 return 0;
923 }
924
925 /**
926 * fsl_rio_unmap_inb_mem -- Unmapping inbound memory region.
927 * @mport: RapidIO master port
928 * @lstart: Local memory space start address.
929 */
930 static void tsi721_rio_unmap_inb_mem(struct rio_mport *mport,
931 dma_addr_t lstart)
932 {
933 struct tsi721_device *priv = mport->priv;
934 int i;
935 u64 addr;
936 u32 regval;
937
938 /* Search for matching active inbound translation window */
939 for (i = 0; i < TSI721_IBWIN_NUM; i++) {
940 regval = ioread32(priv->regs + TSI721_IBWIN_LB(i));
941 if (regval & TSI721_IBWIN_LB_WEN) {
942 regval = ioread32(priv->regs + TSI721_IBWIN_TUA(i));
943 addr = (u64)regval << 32;
944 regval = ioread32(priv->regs + TSI721_IBWIN_TLA(i));
945 addr |= regval & TSI721_IBWIN_TLA_ADD;
946
947 if (addr == (u64)lstart) {
948 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
949 break;
950 }
951 }
952 }
953 }
954
955 /**
956 * tsi721_init_sr2pc_mapping - initializes inbound (SRIO->PCIe)
957 * translation regions.
958 * @priv: pointer to tsi721 private data
959 *
960 * Disables inbound windows.
961 */
962 static void tsi721_init_sr2pc_mapping(struct tsi721_device *priv)
963 {
964 int i;
965
966 /* Disable all SR2PC inbound windows */
967 for (i = 0; i < TSI721_IBWIN_NUM; i++)
968 iowrite32(0, priv->regs + TSI721_IBWIN_LB(i));
969 }
970
971 /**
972 * tsi721_port_write_init - Inbound port write interface init
973 * @priv: pointer to tsi721 private data
974 *
975 * Initializes inbound port write handler.
976 * Returns %0 on success or %-ENOMEM on failure.
977 */
978 static int tsi721_port_write_init(struct tsi721_device *priv)
979 {
980 priv->pw_discard_count = 0;
981 INIT_WORK(&priv->pw_work, tsi721_pw_dpc);
982 spin_lock_init(&priv->pw_fifo_lock);
983 if (kfifo_alloc(&priv->pw_fifo,
984 TSI721_RIO_PW_MSG_SIZE * 32, GFP_KERNEL)) {
985 dev_err(&priv->pdev->dev, "PW FIFO allocation failed\n");
986 return -ENOMEM;
987 }
988
989 /* Use reliable port-write capture mode */
990 iowrite32(TSI721_RIO_PW_CTL_PWC_REL, priv->regs + TSI721_RIO_PW_CTL);
991 return 0;
992 }
993
994 static int tsi721_doorbell_init(struct tsi721_device *priv)
995 {
996 /* Outbound Doorbells do not require any setup.
997 * Tsi721 uses dedicated PCI BAR1 to generate doorbells.
998 * That BAR1 was mapped during the probe routine.
999 */
1000
1001 /* Initialize Inbound Doorbell processing DPC and queue */
1002 priv->db_discard_count = 0;
1003 INIT_WORK(&priv->idb_work, tsi721_db_dpc);
1004
1005 /* Allocate buffer for inbound doorbells queue */
1006 priv->idb_base = dma_zalloc_coherent(&priv->pdev->dev,
1007 IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1008 &priv->idb_dma, GFP_KERNEL);
1009 if (!priv->idb_base)
1010 return -ENOMEM;
1011
1012 dev_dbg(&priv->pdev->dev, "Allocated IDB buffer @ %p (phys = %llx)\n",
1013 priv->idb_base, (unsigned long long)priv->idb_dma);
1014
1015 iowrite32(TSI721_IDQ_SIZE_VAL(IDB_QSIZE),
1016 priv->regs + TSI721_IDQ_SIZE(IDB_QUEUE));
1017 iowrite32(((u64)priv->idb_dma >> 32),
1018 priv->regs + TSI721_IDQ_BASEU(IDB_QUEUE));
1019 iowrite32(((u64)priv->idb_dma & TSI721_IDQ_BASEL_ADDR),
1020 priv->regs + TSI721_IDQ_BASEL(IDB_QUEUE));
1021 /* Enable accepting all inbound doorbells */
1022 iowrite32(0, priv->regs + TSI721_IDQ_MASK(IDB_QUEUE));
1023
1024 iowrite32(TSI721_IDQ_INIT, priv->regs + TSI721_IDQ_CTL(IDB_QUEUE));
1025
1026 iowrite32(0, priv->regs + TSI721_IDQ_RP(IDB_QUEUE));
1027
1028 return 0;
1029 }
1030
1031 static void tsi721_doorbell_free(struct tsi721_device *priv)
1032 {
1033 if (priv->idb_base == NULL)
1034 return;
1035
1036 /* Free buffer allocated for inbound doorbell queue */
1037 dma_free_coherent(&priv->pdev->dev, IDB_QSIZE * TSI721_IDB_ENTRY_SIZE,
1038 priv->idb_base, priv->idb_dma);
1039 priv->idb_base = NULL;
1040 }
1041
1042 /**
1043 * tsi721_bdma_maint_init - Initialize maintenance request BDMA channel.
1044 * @priv: pointer to tsi721 private data
1045 *
1046 * Initialize BDMA channel allocated for RapidIO maintenance read/write
1047 * request generation
1048 * Returns %0 on success or %-ENOMEM on failure.
1049 */
1050 static int tsi721_bdma_maint_init(struct tsi721_device *priv)
1051 {
1052 struct tsi721_dma_desc *bd_ptr;
1053 u64 *sts_ptr;
1054 dma_addr_t bd_phys, sts_phys;
1055 int sts_size;
1056 int bd_num = 2;
1057 void __iomem *regs;
1058
1059 dev_dbg(&priv->pdev->dev,
1060 "Init Block DMA Engine for Maintenance requests, CH%d\n",
1061 TSI721_DMACH_MAINT);
1062
1063 /*
1064 * Initialize DMA channel for maintenance requests
1065 */
1066
1067 priv->mdma.ch_id = TSI721_DMACH_MAINT;
1068 regs = priv->regs + TSI721_DMAC_BASE(TSI721_DMACH_MAINT);
1069
1070 /* Allocate space for DMA descriptors */
1071 bd_ptr = dma_zalloc_coherent(&priv->pdev->dev,
1072 bd_num * sizeof(struct tsi721_dma_desc),
1073 &bd_phys, GFP_KERNEL);
1074 if (!bd_ptr)
1075 return -ENOMEM;
1076
1077 priv->mdma.bd_num = bd_num;
1078 priv->mdma.bd_phys = bd_phys;
1079 priv->mdma.bd_base = bd_ptr;
1080
1081 dev_dbg(&priv->pdev->dev, "DMA descriptors @ %p (phys = %llx)\n",
1082 bd_ptr, (unsigned long long)bd_phys);
1083
1084 /* Allocate space for descriptor status FIFO */
1085 sts_size = (bd_num >= TSI721_DMA_MINSTSSZ) ?
1086 bd_num : TSI721_DMA_MINSTSSZ;
1087 sts_size = roundup_pow_of_two(sts_size);
1088 sts_ptr = dma_zalloc_coherent(&priv->pdev->dev,
1089 sts_size * sizeof(struct tsi721_dma_sts),
1090 &sts_phys, GFP_KERNEL);
1091 if (!sts_ptr) {
1092 /* Free space allocated for DMA descriptors */
1093 dma_free_coherent(&priv->pdev->dev,
1094 bd_num * sizeof(struct tsi721_dma_desc),
1095 bd_ptr, bd_phys);
1096 priv->mdma.bd_base = NULL;
1097 return -ENOMEM;
1098 }
1099
1100 priv->mdma.sts_phys = sts_phys;
1101 priv->mdma.sts_base = sts_ptr;
1102 priv->mdma.sts_size = sts_size;
1103
1104 dev_dbg(&priv->pdev->dev,
1105 "desc status FIFO @ %p (phys = %llx) size=0x%x\n",
1106 sts_ptr, (unsigned long long)sts_phys, sts_size);
1107
1108 /* Initialize DMA descriptors ring */
1109 bd_ptr[bd_num - 1].type_id = cpu_to_le32(DTYPE3 << 29);
1110 bd_ptr[bd_num - 1].next_lo = cpu_to_le32((u64)bd_phys &
1111 TSI721_DMAC_DPTRL_MASK);
1112 bd_ptr[bd_num - 1].next_hi = cpu_to_le32((u64)bd_phys >> 32);
1113
1114 /* Setup DMA descriptor pointers */
1115 iowrite32(((u64)bd_phys >> 32), regs + TSI721_DMAC_DPTRH);
1116 iowrite32(((u64)bd_phys & TSI721_DMAC_DPTRL_MASK),
1117 regs + TSI721_DMAC_DPTRL);
1118
1119 /* Setup descriptor status FIFO */
1120 iowrite32(((u64)sts_phys >> 32), regs + TSI721_DMAC_DSBH);
1121 iowrite32(((u64)sts_phys & TSI721_DMAC_DSBL_MASK),
1122 regs + TSI721_DMAC_DSBL);
1123 iowrite32(TSI721_DMAC_DSSZ_SIZE(sts_size),
1124 regs + TSI721_DMAC_DSSZ);
1125
1126 /* Clear interrupt bits */
1127 iowrite32(TSI721_DMAC_INT_ALL, regs + TSI721_DMAC_INT);
1128
1129 ioread32(regs + TSI721_DMAC_INT);
1130
1131 /* Toggle DMA channel initialization */
1132 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1133 ioread32(regs + TSI721_DMAC_CTL);
1134 udelay(10);
1135
1136 return 0;
1137 }
1138
1139 static int tsi721_bdma_maint_free(struct tsi721_device *priv)
1140 {
1141 u32 ch_stat;
1142 struct tsi721_bdma_maint *mdma = &priv->mdma;
1143 void __iomem *regs = priv->regs + TSI721_DMAC_BASE(mdma->ch_id);
1144
1145 if (mdma->bd_base == NULL)
1146 return 0;
1147
1148 /* Check if DMA channel still running */
1149 ch_stat = ioread32(regs + TSI721_DMAC_STS);
1150 if (ch_stat & TSI721_DMAC_STS_RUN)
1151 return -EFAULT;
1152
1153 /* Put DMA channel into init state */
1154 iowrite32(TSI721_DMAC_CTL_INIT, regs + TSI721_DMAC_CTL);
1155
1156 /* Free space allocated for DMA descriptors */
1157 dma_free_coherent(&priv->pdev->dev,
1158 mdma->bd_num * sizeof(struct tsi721_dma_desc),
1159 mdma->bd_base, mdma->bd_phys);
1160 mdma->bd_base = NULL;
1161
1162 /* Free space allocated for status FIFO */
1163 dma_free_coherent(&priv->pdev->dev,
1164 mdma->sts_size * sizeof(struct tsi721_dma_sts),
1165 mdma->sts_base, mdma->sts_phys);
1166 mdma->sts_base = NULL;
1167 return 0;
1168 }
1169
1170 /* Enable Inbound Messaging Interrupts */
1171 static void
1172 tsi721_imsg_interrupt_enable(struct tsi721_device *priv, int ch,
1173 u32 inte_mask)
1174 {
1175 u32 rval;
1176
1177 if (!inte_mask)
1178 return;
1179
1180 /* Clear pending Inbound Messaging interrupts */
1181 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1182
1183 /* Enable Inbound Messaging interrupts */
1184 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1185 iowrite32(rval | inte_mask, priv->regs + TSI721_IBDMAC_INTE(ch));
1186
1187 if (priv->flags & TSI721_USING_MSIX)
1188 return; /* Finished if we are in MSI-X mode */
1189
1190 /*
1191 * For MSI and INTA interrupt signalling we need to enable next levels
1192 */
1193
1194 /* Enable Device Channel Interrupt */
1195 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1196 iowrite32(rval | TSI721_INT_IMSG_CHAN(ch),
1197 priv->regs + TSI721_DEV_CHAN_INTE);
1198 }
1199
1200 /* Disable Inbound Messaging Interrupts */
1201 static void
1202 tsi721_imsg_interrupt_disable(struct tsi721_device *priv, int ch,
1203 u32 inte_mask)
1204 {
1205 u32 rval;
1206
1207 if (!inte_mask)
1208 return;
1209
1210 /* Clear pending Inbound Messaging interrupts */
1211 iowrite32(inte_mask, priv->regs + TSI721_IBDMAC_INT(ch));
1212
1213 /* Disable Inbound Messaging interrupts */
1214 rval = ioread32(priv->regs + TSI721_IBDMAC_INTE(ch));
1215 rval &= ~inte_mask;
1216 iowrite32(rval, priv->regs + TSI721_IBDMAC_INTE(ch));
1217
1218 if (priv->flags & TSI721_USING_MSIX)
1219 return; /* Finished if we are in MSI-X mode */
1220
1221 /*
1222 * For MSI and INTA interrupt signalling we need to disable next levels
1223 */
1224
1225 /* Disable Device Channel Interrupt */
1226 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1227 rval &= ~TSI721_INT_IMSG_CHAN(ch);
1228 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1229 }
1230
1231 /* Enable Outbound Messaging interrupts */
1232 static void
1233 tsi721_omsg_interrupt_enable(struct tsi721_device *priv, int ch,
1234 u32 inte_mask)
1235 {
1236 u32 rval;
1237
1238 if (!inte_mask)
1239 return;
1240
1241 /* Clear pending Outbound Messaging interrupts */
1242 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1243
1244 /* Enable Outbound Messaging channel interrupts */
1245 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1246 iowrite32(rval | inte_mask, priv->regs + TSI721_OBDMAC_INTE(ch));
1247
1248 if (priv->flags & TSI721_USING_MSIX)
1249 return; /* Finished if we are in MSI-X mode */
1250
1251 /*
1252 * For MSI and INTA interrupt signalling we need to enable next levels
1253 */
1254
1255 /* Enable Device Channel Interrupt */
1256 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1257 iowrite32(rval | TSI721_INT_OMSG_CHAN(ch),
1258 priv->regs + TSI721_DEV_CHAN_INTE);
1259 }
1260
1261 /* Disable Outbound Messaging interrupts */
1262 static void
1263 tsi721_omsg_interrupt_disable(struct tsi721_device *priv, int ch,
1264 u32 inte_mask)
1265 {
1266 u32 rval;
1267
1268 if (!inte_mask)
1269 return;
1270
1271 /* Clear pending Outbound Messaging interrupts */
1272 iowrite32(inte_mask, priv->regs + TSI721_OBDMAC_INT(ch));
1273
1274 /* Disable Outbound Messaging interrupts */
1275 rval = ioread32(priv->regs + TSI721_OBDMAC_INTE(ch));
1276 rval &= ~inte_mask;
1277 iowrite32(rval, priv->regs + TSI721_OBDMAC_INTE(ch));
1278
1279 if (priv->flags & TSI721_USING_MSIX)
1280 return; /* Finished if we are in MSI-X mode */
1281
1282 /*
1283 * For MSI and INTA interrupt signalling we need to disable next levels
1284 */
1285
1286 /* Disable Device Channel Interrupt */
1287 rval = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1288 rval &= ~TSI721_INT_OMSG_CHAN(ch);
1289 iowrite32(rval, priv->regs + TSI721_DEV_CHAN_INTE);
1290 }
1291
1292 /**
1293 * tsi721_add_outb_message - Add message to the Tsi721 outbound message queue
1294 * @mport: Master port with outbound message queue
1295 * @rdev: Target of outbound message
1296 * @mbox: Outbound mailbox
1297 * @buffer: Message to add to outbound queue
1298 * @len: Length of message
1299 */
1300 static int
1301 tsi721_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
1302 void *buffer, size_t len)
1303 {
1304 struct tsi721_device *priv = mport->priv;
1305 struct tsi721_omsg_desc *desc;
1306 u32 tx_slot;
1307
1308 if (!priv->omsg_init[mbox] ||
1309 len > TSI721_MSG_MAX_SIZE || len < 8)
1310 return -EINVAL;
1311
1312 tx_slot = priv->omsg_ring[mbox].tx_slot;
1313
1314 /* Copy copy message into transfer buffer */
1315 memcpy(priv->omsg_ring[mbox].omq_base[tx_slot], buffer, len);
1316
1317 if (len & 0x7)
1318 len += 8;
1319
1320 /* Build descriptor associated with buffer */
1321 desc = priv->omsg_ring[mbox].omd_base;
1322 desc[tx_slot].type_id = cpu_to_le32((DTYPE4 << 29) | rdev->destid);
1323 if (tx_slot % 4 == 0)
1324 desc[tx_slot].type_id |= cpu_to_le32(TSI721_OMD_IOF);
1325
1326 desc[tx_slot].msg_info =
1327 cpu_to_le32((mport->sys_size << 26) | (mbox << 22) |
1328 (0xe << 12) | (len & 0xff8));
1329 desc[tx_slot].bufptr_lo =
1330 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] &
1331 0xffffffff);
1332 desc[tx_slot].bufptr_hi =
1333 cpu_to_le32((u64)priv->omsg_ring[mbox].omq_phys[tx_slot] >> 32);
1334
1335 priv->omsg_ring[mbox].wr_count++;
1336
1337 /* Go to next descriptor */
1338 if (++priv->omsg_ring[mbox].tx_slot == priv->omsg_ring[mbox].size) {
1339 priv->omsg_ring[mbox].tx_slot = 0;
1340 /* Move through the ring link descriptor at the end */
1341 priv->omsg_ring[mbox].wr_count++;
1342 }
1343
1344 mb();
1345
1346 /* Set new write count value */
1347 iowrite32(priv->omsg_ring[mbox].wr_count,
1348 priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1349 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1350
1351 return 0;
1352 }
1353
1354 /**
1355 * tsi721_omsg_handler - Outbound Message Interrupt Handler
1356 * @priv: pointer to tsi721 private data
1357 * @ch: number of OB MSG channel to service
1358 *
1359 * Services channel interrupts from outbound messaging engine.
1360 */
1361 static void tsi721_omsg_handler(struct tsi721_device *priv, int ch)
1362 {
1363 u32 omsg_int;
1364
1365 spin_lock(&priv->omsg_ring[ch].lock);
1366
1367 omsg_int = ioread32(priv->regs + TSI721_OBDMAC_INT(ch));
1368
1369 if (omsg_int & TSI721_OBDMAC_INT_ST_FULL)
1370 dev_info(&priv->pdev->dev,
1371 "OB MBOX%d: Status FIFO is full\n", ch);
1372
1373 if (omsg_int & (TSI721_OBDMAC_INT_DONE | TSI721_OBDMAC_INT_IOF_DONE)) {
1374 u32 srd_ptr;
1375 u64 *sts_ptr, last_ptr = 0, prev_ptr = 0;
1376 int i, j;
1377 u32 tx_slot;
1378
1379 /*
1380 * Find last successfully processed descriptor
1381 */
1382
1383 /* Check and clear descriptor status FIFO entries */
1384 srd_ptr = priv->omsg_ring[ch].sts_rdptr;
1385 sts_ptr = priv->omsg_ring[ch].sts_base;
1386 j = srd_ptr * 8;
1387 while (sts_ptr[j]) {
1388 for (i = 0; i < 8 && sts_ptr[j]; i++, j++) {
1389 prev_ptr = last_ptr;
1390 last_ptr = le64_to_cpu(sts_ptr[j]);
1391 sts_ptr[j] = 0;
1392 }
1393
1394 ++srd_ptr;
1395 srd_ptr %= priv->omsg_ring[ch].sts_size;
1396 j = srd_ptr * 8;
1397 }
1398
1399 if (last_ptr == 0)
1400 goto no_sts_update;
1401
1402 priv->omsg_ring[ch].sts_rdptr = srd_ptr;
1403 iowrite32(srd_ptr, priv->regs + TSI721_OBDMAC_DSRP(ch));
1404
1405 if (!priv->mport->outb_msg[ch].mcback)
1406 goto no_sts_update;
1407
1408 /* Inform upper layer about transfer completion */
1409
1410 tx_slot = (last_ptr - (u64)priv->omsg_ring[ch].omd_phys)/
1411 sizeof(struct tsi721_omsg_desc);
1412
1413 /*
1414 * Check if this is a Link Descriptor (LD).
1415 * If yes, ignore LD and use descriptor processed
1416 * before LD.
1417 */
1418 if (tx_slot == priv->omsg_ring[ch].size) {
1419 if (prev_ptr)
1420 tx_slot = (prev_ptr -
1421 (u64)priv->omsg_ring[ch].omd_phys)/
1422 sizeof(struct tsi721_omsg_desc);
1423 else
1424 goto no_sts_update;
1425 }
1426
1427 /* Move slot index to the next message to be sent */
1428 ++tx_slot;
1429 if (tx_slot == priv->omsg_ring[ch].size)
1430 tx_slot = 0;
1431 BUG_ON(tx_slot >= priv->omsg_ring[ch].size);
1432 priv->mport->outb_msg[ch].mcback(priv->mport,
1433 priv->omsg_ring[ch].dev_id, ch,
1434 tx_slot);
1435 }
1436
1437 no_sts_update:
1438
1439 if (omsg_int & TSI721_OBDMAC_INT_ERROR) {
1440 /*
1441 * Outbound message operation aborted due to error,
1442 * reinitialize OB MSG channel
1443 */
1444
1445 dev_dbg(&priv->pdev->dev, "OB MSG ABORT ch_stat=%x\n",
1446 ioread32(priv->regs + TSI721_OBDMAC_STS(ch)));
1447
1448 iowrite32(TSI721_OBDMAC_INT_ERROR,
1449 priv->regs + TSI721_OBDMAC_INT(ch));
1450 iowrite32(TSI721_OBDMAC_CTL_INIT,
1451 priv->regs + TSI721_OBDMAC_CTL(ch));
1452 ioread32(priv->regs + TSI721_OBDMAC_CTL(ch));
1453
1454 /* Inform upper level to clear all pending tx slots */
1455 if (priv->mport->outb_msg[ch].mcback)
1456 priv->mport->outb_msg[ch].mcback(priv->mport,
1457 priv->omsg_ring[ch].dev_id, ch,
1458 priv->omsg_ring[ch].tx_slot);
1459 /* Synch tx_slot tracking */
1460 iowrite32(priv->omsg_ring[ch].tx_slot,
1461 priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1462 ioread32(priv->regs + TSI721_OBDMAC_DRDCNT(ch));
1463 priv->omsg_ring[ch].wr_count = priv->omsg_ring[ch].tx_slot;
1464 priv->omsg_ring[ch].sts_rdptr = 0;
1465 }
1466
1467 /* Clear channel interrupts */
1468 iowrite32(omsg_int, priv->regs + TSI721_OBDMAC_INT(ch));
1469
1470 if (!(priv->flags & TSI721_USING_MSIX)) {
1471 u32 ch_inte;
1472
1473 /* Re-enable channel interrupts */
1474 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1475 ch_inte |= TSI721_INT_OMSG_CHAN(ch);
1476 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1477 }
1478
1479 spin_unlock(&priv->omsg_ring[ch].lock);
1480 }
1481
1482 /**
1483 * tsi721_open_outb_mbox - Initialize Tsi721 outbound mailbox
1484 * @mport: Master port implementing Outbound Messaging Engine
1485 * @dev_id: Device specific pointer to pass on event
1486 * @mbox: Mailbox to open
1487 * @entries: Number of entries in the outbound mailbox ring
1488 */
1489 static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id,
1490 int mbox, int entries)
1491 {
1492 struct tsi721_device *priv = mport->priv;
1493 struct tsi721_omsg_desc *bd_ptr;
1494 int i, rc = 0;
1495
1496 if ((entries < TSI721_OMSGD_MIN_RING_SIZE) ||
1497 (entries > (TSI721_OMSGD_RING_SIZE)) ||
1498 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1499 rc = -EINVAL;
1500 goto out;
1501 }
1502
1503 priv->omsg_ring[mbox].dev_id = dev_id;
1504 priv->omsg_ring[mbox].size = entries;
1505 priv->omsg_ring[mbox].sts_rdptr = 0;
1506 spin_lock_init(&priv->omsg_ring[mbox].lock);
1507
1508 /* Outbound Msg Buffer allocation based on
1509 the number of maximum descriptor entries */
1510 for (i = 0; i < entries; i++) {
1511 priv->omsg_ring[mbox].omq_base[i] =
1512 dma_alloc_coherent(
1513 &priv->pdev->dev, TSI721_MSG_BUFFER_SIZE,
1514 &priv->omsg_ring[mbox].omq_phys[i],
1515 GFP_KERNEL);
1516 if (priv->omsg_ring[mbox].omq_base[i] == NULL) {
1517 dev_dbg(&priv->pdev->dev,
1518 "Unable to allocate OB MSG data buffer for"
1519 " MBOX%d\n", mbox);
1520 rc = -ENOMEM;
1521 goto out_buf;
1522 }
1523 }
1524
1525 /* Outbound message descriptor allocation */
1526 priv->omsg_ring[mbox].omd_base = dma_alloc_coherent(
1527 &priv->pdev->dev,
1528 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1529 &priv->omsg_ring[mbox].omd_phys, GFP_KERNEL);
1530 if (priv->omsg_ring[mbox].omd_base == NULL) {
1531 dev_dbg(&priv->pdev->dev,
1532 "Unable to allocate OB MSG descriptor memory "
1533 "for MBOX%d\n", mbox);
1534 rc = -ENOMEM;
1535 goto out_buf;
1536 }
1537
1538 priv->omsg_ring[mbox].tx_slot = 0;
1539
1540 /* Outbound message descriptor status FIFO allocation */
1541 priv->omsg_ring[mbox].sts_size = roundup_pow_of_two(entries + 1);
1542 priv->omsg_ring[mbox].sts_base = dma_zalloc_coherent(&priv->pdev->dev,
1543 priv->omsg_ring[mbox].sts_size *
1544 sizeof(struct tsi721_dma_sts),
1545 &priv->omsg_ring[mbox].sts_phys, GFP_KERNEL);
1546 if (priv->omsg_ring[mbox].sts_base == NULL) {
1547 dev_dbg(&priv->pdev->dev,
1548 "Unable to allocate OB MSG descriptor status FIFO "
1549 "for MBOX%d\n", mbox);
1550 rc = -ENOMEM;
1551 goto out_desc;
1552 }
1553
1554 /*
1555 * Configure Outbound Messaging Engine
1556 */
1557
1558 /* Setup Outbound Message descriptor pointer */
1559 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys >> 32),
1560 priv->regs + TSI721_OBDMAC_DPTRH(mbox));
1561 iowrite32(((u64)priv->omsg_ring[mbox].omd_phys &
1562 TSI721_OBDMAC_DPTRL_MASK),
1563 priv->regs + TSI721_OBDMAC_DPTRL(mbox));
1564
1565 /* Setup Outbound Message descriptor status FIFO */
1566 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys >> 32),
1567 priv->regs + TSI721_OBDMAC_DSBH(mbox));
1568 iowrite32(((u64)priv->omsg_ring[mbox].sts_phys &
1569 TSI721_OBDMAC_DSBL_MASK),
1570 priv->regs + TSI721_OBDMAC_DSBL(mbox));
1571 iowrite32(TSI721_DMAC_DSSZ_SIZE(priv->omsg_ring[mbox].sts_size),
1572 priv->regs + (u32)TSI721_OBDMAC_DSSZ(mbox));
1573
1574 /* Enable interrupts */
1575
1576 #ifdef CONFIG_PCI_MSI
1577 if (priv->flags & TSI721_USING_MSIX) {
1578 /* Request interrupt service if we are in MSI-X mode */
1579 rc = request_irq(
1580 priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1581 tsi721_omsg_msix, 0,
1582 priv->msix[TSI721_VECT_OMB0_DONE + mbox].irq_name,
1583 (void *)mport);
1584
1585 if (rc) {
1586 dev_dbg(&priv->pdev->dev,
1587 "Unable to allocate MSI-X interrupt for "
1588 "OBOX%d-DONE\n", mbox);
1589 goto out_stat;
1590 }
1591
1592 rc = request_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
1593 tsi721_omsg_msix, 0,
1594 priv->msix[TSI721_VECT_OMB0_INT + mbox].irq_name,
1595 (void *)mport);
1596
1597 if (rc) {
1598 dev_dbg(&priv->pdev->dev,
1599 "Unable to allocate MSI-X interrupt for "
1600 "MBOX%d-INT\n", mbox);
1601 free_irq(
1602 priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1603 (void *)mport);
1604 goto out_stat;
1605 }
1606 }
1607 #endif /* CONFIG_PCI_MSI */
1608
1609 tsi721_omsg_interrupt_enable(priv, mbox, TSI721_OBDMAC_INT_ALL);
1610
1611 /* Initialize Outbound Message descriptors ring */
1612 bd_ptr = priv->omsg_ring[mbox].omd_base;
1613 bd_ptr[entries].type_id = cpu_to_le32(DTYPE5 << 29);
1614 bd_ptr[entries].msg_info = 0;
1615 bd_ptr[entries].next_lo =
1616 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys &
1617 TSI721_OBDMAC_DPTRL_MASK);
1618 bd_ptr[entries].next_hi =
1619 cpu_to_le32((u64)priv->omsg_ring[mbox].omd_phys >> 32);
1620 priv->omsg_ring[mbox].wr_count = 0;
1621 mb();
1622
1623 /* Initialize Outbound Message engine */
1624 iowrite32(TSI721_OBDMAC_CTL_INIT, priv->regs + TSI721_OBDMAC_CTL(mbox));
1625 ioread32(priv->regs + TSI721_OBDMAC_DWRCNT(mbox));
1626 udelay(10);
1627
1628 priv->omsg_init[mbox] = 1;
1629
1630 return 0;
1631
1632 #ifdef CONFIG_PCI_MSI
1633 out_stat:
1634 dma_free_coherent(&priv->pdev->dev,
1635 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1636 priv->omsg_ring[mbox].sts_base,
1637 priv->omsg_ring[mbox].sts_phys);
1638
1639 priv->omsg_ring[mbox].sts_base = NULL;
1640 #endif /* CONFIG_PCI_MSI */
1641
1642 out_desc:
1643 dma_free_coherent(&priv->pdev->dev,
1644 (entries + 1) * sizeof(struct tsi721_omsg_desc),
1645 priv->omsg_ring[mbox].omd_base,
1646 priv->omsg_ring[mbox].omd_phys);
1647
1648 priv->omsg_ring[mbox].omd_base = NULL;
1649
1650 out_buf:
1651 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
1652 if (priv->omsg_ring[mbox].omq_base[i]) {
1653 dma_free_coherent(&priv->pdev->dev,
1654 TSI721_MSG_BUFFER_SIZE,
1655 priv->omsg_ring[mbox].omq_base[i],
1656 priv->omsg_ring[mbox].omq_phys[i]);
1657
1658 priv->omsg_ring[mbox].omq_base[i] = NULL;
1659 }
1660 }
1661
1662 out:
1663 return rc;
1664 }
1665
1666 /**
1667 * tsi721_close_outb_mbox - Close Tsi721 outbound mailbox
1668 * @mport: Master port implementing the outbound message unit
1669 * @mbox: Mailbox to close
1670 */
1671 static void tsi721_close_outb_mbox(struct rio_mport *mport, int mbox)
1672 {
1673 struct tsi721_device *priv = mport->priv;
1674 u32 i;
1675
1676 if (!priv->omsg_init[mbox])
1677 return;
1678 priv->omsg_init[mbox] = 0;
1679
1680 /* Disable Interrupts */
1681
1682 tsi721_omsg_interrupt_disable(priv, mbox, TSI721_OBDMAC_INT_ALL);
1683
1684 #ifdef CONFIG_PCI_MSI
1685 if (priv->flags & TSI721_USING_MSIX) {
1686 free_irq(priv->msix[TSI721_VECT_OMB0_DONE + mbox].vector,
1687 (void *)mport);
1688 free_irq(priv->msix[TSI721_VECT_OMB0_INT + mbox].vector,
1689 (void *)mport);
1690 }
1691 #endif /* CONFIG_PCI_MSI */
1692
1693 /* Free OMSG Descriptor Status FIFO */
1694 dma_free_coherent(&priv->pdev->dev,
1695 priv->omsg_ring[mbox].sts_size * sizeof(struct tsi721_dma_sts),
1696 priv->omsg_ring[mbox].sts_base,
1697 priv->omsg_ring[mbox].sts_phys);
1698
1699 priv->omsg_ring[mbox].sts_base = NULL;
1700
1701 /* Free OMSG descriptors */
1702 dma_free_coherent(&priv->pdev->dev,
1703 (priv->omsg_ring[mbox].size + 1) *
1704 sizeof(struct tsi721_omsg_desc),
1705 priv->omsg_ring[mbox].omd_base,
1706 priv->omsg_ring[mbox].omd_phys);
1707
1708 priv->omsg_ring[mbox].omd_base = NULL;
1709
1710 /* Free message buffers */
1711 for (i = 0; i < priv->omsg_ring[mbox].size; i++) {
1712 if (priv->omsg_ring[mbox].omq_base[i]) {
1713 dma_free_coherent(&priv->pdev->dev,
1714 TSI721_MSG_BUFFER_SIZE,
1715 priv->omsg_ring[mbox].omq_base[i],
1716 priv->omsg_ring[mbox].omq_phys[i]);
1717
1718 priv->omsg_ring[mbox].omq_base[i] = NULL;
1719 }
1720 }
1721 }
1722
1723 /**
1724 * tsi721_imsg_handler - Inbound Message Interrupt Handler
1725 * @priv: pointer to tsi721 private data
1726 * @ch: inbound message channel number to service
1727 *
1728 * Services channel interrupts from inbound messaging engine.
1729 */
1730 static void tsi721_imsg_handler(struct tsi721_device *priv, int ch)
1731 {
1732 u32 mbox = ch - 4;
1733 u32 imsg_int;
1734
1735 spin_lock(&priv->imsg_ring[mbox].lock);
1736
1737 imsg_int = ioread32(priv->regs + TSI721_IBDMAC_INT(ch));
1738
1739 if (imsg_int & TSI721_IBDMAC_INT_SRTO)
1740 dev_info(&priv->pdev->dev, "IB MBOX%d SRIO timeout\n",
1741 mbox);
1742
1743 if (imsg_int & TSI721_IBDMAC_INT_PC_ERROR)
1744 dev_info(&priv->pdev->dev, "IB MBOX%d PCIe error\n",
1745 mbox);
1746
1747 if (imsg_int & TSI721_IBDMAC_INT_FQ_LOW)
1748 dev_info(&priv->pdev->dev,
1749 "IB MBOX%d IB free queue low\n", mbox);
1750
1751 /* Clear IB channel interrupts */
1752 iowrite32(imsg_int, priv->regs + TSI721_IBDMAC_INT(ch));
1753
1754 /* If an IB Msg is received notify the upper layer */
1755 if (imsg_int & TSI721_IBDMAC_INT_DQ_RCV &&
1756 priv->mport->inb_msg[mbox].mcback)
1757 priv->mport->inb_msg[mbox].mcback(priv->mport,
1758 priv->imsg_ring[mbox].dev_id, mbox, -1);
1759
1760 if (!(priv->flags & TSI721_USING_MSIX)) {
1761 u32 ch_inte;
1762
1763 /* Re-enable channel interrupts */
1764 ch_inte = ioread32(priv->regs + TSI721_DEV_CHAN_INTE);
1765 ch_inte |= TSI721_INT_IMSG_CHAN(ch);
1766 iowrite32(ch_inte, priv->regs + TSI721_DEV_CHAN_INTE);
1767 }
1768
1769 spin_unlock(&priv->imsg_ring[mbox].lock);
1770 }
1771
1772 /**
1773 * tsi721_open_inb_mbox - Initialize Tsi721 inbound mailbox
1774 * @mport: Master port implementing the Inbound Messaging Engine
1775 * @dev_id: Device specific pointer to pass on event
1776 * @mbox: Mailbox to open
1777 * @entries: Number of entries in the inbound mailbox ring
1778 */
1779 static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id,
1780 int mbox, int entries)
1781 {
1782 struct tsi721_device *priv = mport->priv;
1783 int ch = mbox + 4;
1784 int i;
1785 u64 *free_ptr;
1786 int rc = 0;
1787
1788 if ((entries < TSI721_IMSGD_MIN_RING_SIZE) ||
1789 (entries > TSI721_IMSGD_RING_SIZE) ||
1790 (!is_power_of_2(entries)) || mbox >= RIO_MAX_MBOX) {
1791 rc = -EINVAL;
1792 goto out;
1793 }
1794
1795 /* Initialize IB Messaging Ring */
1796 priv->imsg_ring[mbox].dev_id = dev_id;
1797 priv->imsg_ring[mbox].size = entries;
1798 priv->imsg_ring[mbox].rx_slot = 0;
1799 priv->imsg_ring[mbox].desc_rdptr = 0;
1800 priv->imsg_ring[mbox].fq_wrptr = 0;
1801 for (i = 0; i < priv->imsg_ring[mbox].size; i++)
1802 priv->imsg_ring[mbox].imq_base[i] = NULL;
1803 spin_lock_init(&priv->imsg_ring[mbox].lock);
1804
1805 /* Allocate buffers for incoming messages */
1806 priv->imsg_ring[mbox].buf_base =
1807 dma_alloc_coherent(&priv->pdev->dev,
1808 entries * TSI721_MSG_BUFFER_SIZE,
1809 &priv->imsg_ring[mbox].buf_phys,
1810 GFP_KERNEL);
1811
1812 if (priv->imsg_ring[mbox].buf_base == NULL) {
1813 dev_err(&priv->pdev->dev,
1814 "Failed to allocate buffers for IB MBOX%d\n", mbox);
1815 rc = -ENOMEM;
1816 goto out;
1817 }
1818
1819 /* Allocate memory for circular free list */
1820 priv->imsg_ring[mbox].imfq_base =
1821 dma_alloc_coherent(&priv->pdev->dev,
1822 entries * 8,
1823 &priv->imsg_ring[mbox].imfq_phys,
1824 GFP_KERNEL);
1825
1826 if (priv->imsg_ring[mbox].imfq_base == NULL) {
1827 dev_err(&priv->pdev->dev,
1828 "Failed to allocate free queue for IB MBOX%d\n", mbox);
1829 rc = -ENOMEM;
1830 goto out_buf;
1831 }
1832
1833 /* Allocate memory for Inbound message descriptors */
1834 priv->imsg_ring[mbox].imd_base =
1835 dma_alloc_coherent(&priv->pdev->dev,
1836 entries * sizeof(struct tsi721_imsg_desc),
1837 &priv->imsg_ring[mbox].imd_phys, GFP_KERNEL);
1838
1839 if (priv->imsg_ring[mbox].imd_base == NULL) {
1840 dev_err(&priv->pdev->dev,
1841 "Failed to allocate descriptor memory for IB MBOX%d\n",
1842 mbox);
1843 rc = -ENOMEM;
1844 goto out_dma;
1845 }
1846
1847 /* Fill free buffer pointer list */
1848 free_ptr = priv->imsg_ring[mbox].imfq_base;
1849 for (i = 0; i < entries; i++)
1850 free_ptr[i] = cpu_to_le64(
1851 (u64)(priv->imsg_ring[mbox].buf_phys) +
1852 i * 0x1000);
1853
1854 mb();
1855
1856 /*
1857 * For mapping of inbound SRIO Messages into appropriate queues we need
1858 * to set Inbound Device ID register in the messaging engine. We do it
1859 * once when first inbound mailbox is requested.
1860 */
1861 if (!(priv->flags & TSI721_IMSGID_SET)) {
1862 iowrite32((u32)priv->mport->host_deviceid,
1863 priv->regs + TSI721_IB_DEVID);
1864 priv->flags |= TSI721_IMSGID_SET;
1865 }
1866
1867 /*
1868 * Configure Inbound Messaging channel (ch = mbox + 4)
1869 */
1870
1871 /* Setup Inbound Message free queue */
1872 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys >> 32),
1873 priv->regs + TSI721_IBDMAC_FQBH(ch));
1874 iowrite32(((u64)priv->imsg_ring[mbox].imfq_phys &
1875 TSI721_IBDMAC_FQBL_MASK),
1876 priv->regs+TSI721_IBDMAC_FQBL(ch));
1877 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
1878 priv->regs + TSI721_IBDMAC_FQSZ(ch));
1879
1880 /* Setup Inbound Message descriptor queue */
1881 iowrite32(((u64)priv->imsg_ring[mbox].imd_phys >> 32),
1882 priv->regs + TSI721_IBDMAC_DQBH(ch));
1883 iowrite32(((u32)priv->imsg_ring[mbox].imd_phys &
1884 (u32)TSI721_IBDMAC_DQBL_MASK),
1885 priv->regs+TSI721_IBDMAC_DQBL(ch));
1886 iowrite32(TSI721_DMAC_DSSZ_SIZE(entries),
1887 priv->regs + TSI721_IBDMAC_DQSZ(ch));
1888
1889 /* Enable interrupts */
1890
1891 #ifdef CONFIG_PCI_MSI
1892 if (priv->flags & TSI721_USING_MSIX) {
1893 /* Request interrupt service if we are in MSI-X mode */
1894 rc = request_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1895 tsi721_imsg_msix, 0,
1896 priv->msix[TSI721_VECT_IMB0_RCV + mbox].irq_name,
1897 (void *)mport);
1898
1899 if (rc) {
1900 dev_dbg(&priv->pdev->dev,
1901 "Unable to allocate MSI-X interrupt for "
1902 "IBOX%d-DONE\n", mbox);
1903 goto out_desc;
1904 }
1905
1906 rc = request_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
1907 tsi721_imsg_msix, 0,
1908 priv->msix[TSI721_VECT_IMB0_INT + mbox].irq_name,
1909 (void *)mport);
1910
1911 if (rc) {
1912 dev_dbg(&priv->pdev->dev,
1913 "Unable to allocate MSI-X interrupt for "
1914 "IBOX%d-INT\n", mbox);
1915 free_irq(
1916 priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1917 (void *)mport);
1918 goto out_desc;
1919 }
1920 }
1921 #endif /* CONFIG_PCI_MSI */
1922
1923 tsi721_imsg_interrupt_enable(priv, ch, TSI721_IBDMAC_INT_ALL);
1924
1925 /* Initialize Inbound Message Engine */
1926 iowrite32(TSI721_IBDMAC_CTL_INIT, priv->regs + TSI721_IBDMAC_CTL(ch));
1927 ioread32(priv->regs + TSI721_IBDMAC_CTL(ch));
1928 udelay(10);
1929 priv->imsg_ring[mbox].fq_wrptr = entries - 1;
1930 iowrite32(entries - 1, priv->regs + TSI721_IBDMAC_FQWP(ch));
1931
1932 priv->imsg_init[mbox] = 1;
1933 return 0;
1934
1935 #ifdef CONFIG_PCI_MSI
1936 out_desc:
1937 dma_free_coherent(&priv->pdev->dev,
1938 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
1939 priv->imsg_ring[mbox].imd_base,
1940 priv->imsg_ring[mbox].imd_phys);
1941
1942 priv->imsg_ring[mbox].imd_base = NULL;
1943 #endif /* CONFIG_PCI_MSI */
1944
1945 out_dma:
1946 dma_free_coherent(&priv->pdev->dev,
1947 priv->imsg_ring[mbox].size * 8,
1948 priv->imsg_ring[mbox].imfq_base,
1949 priv->imsg_ring[mbox].imfq_phys);
1950
1951 priv->imsg_ring[mbox].imfq_base = NULL;
1952
1953 out_buf:
1954 dma_free_coherent(&priv->pdev->dev,
1955 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
1956 priv->imsg_ring[mbox].buf_base,
1957 priv->imsg_ring[mbox].buf_phys);
1958
1959 priv->imsg_ring[mbox].buf_base = NULL;
1960
1961 out:
1962 return rc;
1963 }
1964
1965 /**
1966 * tsi721_close_inb_mbox - Shut down Tsi721 inbound mailbox
1967 * @mport: Master port implementing the Inbound Messaging Engine
1968 * @mbox: Mailbox to close
1969 */
1970 static void tsi721_close_inb_mbox(struct rio_mport *mport, int mbox)
1971 {
1972 struct tsi721_device *priv = mport->priv;
1973 u32 rx_slot;
1974 int ch = mbox + 4;
1975
1976 if (!priv->imsg_init[mbox]) /* mbox isn't initialized yet */
1977 return;
1978 priv->imsg_init[mbox] = 0;
1979
1980 /* Disable Inbound Messaging Engine */
1981
1982 /* Disable Interrupts */
1983 tsi721_imsg_interrupt_disable(priv, ch, TSI721_OBDMAC_INT_MASK);
1984
1985 #ifdef CONFIG_PCI_MSI
1986 if (priv->flags & TSI721_USING_MSIX) {
1987 free_irq(priv->msix[TSI721_VECT_IMB0_RCV + mbox].vector,
1988 (void *)mport);
1989 free_irq(priv->msix[TSI721_VECT_IMB0_INT + mbox].vector,
1990 (void *)mport);
1991 }
1992 #endif /* CONFIG_PCI_MSI */
1993
1994 /* Clear Inbound Buffer Queue */
1995 for (rx_slot = 0; rx_slot < priv->imsg_ring[mbox].size; rx_slot++)
1996 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
1997
1998 /* Free memory allocated for message buffers */
1999 dma_free_coherent(&priv->pdev->dev,
2000 priv->imsg_ring[mbox].size * TSI721_MSG_BUFFER_SIZE,
2001 priv->imsg_ring[mbox].buf_base,
2002 priv->imsg_ring[mbox].buf_phys);
2003
2004 priv->imsg_ring[mbox].buf_base = NULL;
2005
2006 /* Free memory allocated for free pointr list */
2007 dma_free_coherent(&priv->pdev->dev,
2008 priv->imsg_ring[mbox].size * 8,
2009 priv->imsg_ring[mbox].imfq_base,
2010 priv->imsg_ring[mbox].imfq_phys);
2011
2012 priv->imsg_ring[mbox].imfq_base = NULL;
2013
2014 /* Free memory allocated for RX descriptors */
2015 dma_free_coherent(&priv->pdev->dev,
2016 priv->imsg_ring[mbox].size * sizeof(struct tsi721_imsg_desc),
2017 priv->imsg_ring[mbox].imd_base,
2018 priv->imsg_ring[mbox].imd_phys);
2019
2020 priv->imsg_ring[mbox].imd_base = NULL;
2021 }
2022
2023 /**
2024 * tsi721_add_inb_buffer - Add buffer to the Tsi721 inbound message queue
2025 * @mport: Master port implementing the Inbound Messaging Engine
2026 * @mbox: Inbound mailbox number
2027 * @buf: Buffer to add to inbound queue
2028 */
2029 static int tsi721_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
2030 {
2031 struct tsi721_device *priv = mport->priv;
2032 u32 rx_slot;
2033 int rc = 0;
2034
2035 rx_slot = priv->imsg_ring[mbox].rx_slot;
2036 if (priv->imsg_ring[mbox].imq_base[rx_slot]) {
2037 dev_err(&priv->pdev->dev,
2038 "Error adding inbound buffer %d, buffer exists\n",
2039 rx_slot);
2040 rc = -EINVAL;
2041 goto out;
2042 }
2043
2044 priv->imsg_ring[mbox].imq_base[rx_slot] = buf;
2045
2046 if (++priv->imsg_ring[mbox].rx_slot == priv->imsg_ring[mbox].size)
2047 priv->imsg_ring[mbox].rx_slot = 0;
2048
2049 out:
2050 return rc;
2051 }
2052
2053 /**
2054 * tsi721_get_inb_message - Fetch inbound message from the Tsi721 MSG Queue
2055 * @mport: Master port implementing the Inbound Messaging Engine
2056 * @mbox: Inbound mailbox number
2057 *
2058 * Returns pointer to the message on success or NULL on failure.
2059 */
2060 static void *tsi721_get_inb_message(struct rio_mport *mport, int mbox)
2061 {
2062 struct tsi721_device *priv = mport->priv;
2063 struct tsi721_imsg_desc *desc;
2064 u32 rx_slot;
2065 void *rx_virt = NULL;
2066 u64 rx_phys;
2067 void *buf = NULL;
2068 u64 *free_ptr;
2069 int ch = mbox + 4;
2070 int msg_size;
2071
2072 if (!priv->imsg_init[mbox])
2073 return NULL;
2074
2075 desc = priv->imsg_ring[mbox].imd_base;
2076 desc += priv->imsg_ring[mbox].desc_rdptr;
2077
2078 if (!(le32_to_cpu(desc->msg_info) & TSI721_IMD_HO))
2079 goto out;
2080
2081 rx_slot = priv->imsg_ring[mbox].rx_slot;
2082 while (priv->imsg_ring[mbox].imq_base[rx_slot] == NULL) {
2083 if (++rx_slot == priv->imsg_ring[mbox].size)
2084 rx_slot = 0;
2085 }
2086
2087 rx_phys = ((u64)le32_to_cpu(desc->bufptr_hi) << 32) |
2088 le32_to_cpu(desc->bufptr_lo);
2089
2090 rx_virt = priv->imsg_ring[mbox].buf_base +
2091 (rx_phys - (u64)priv->imsg_ring[mbox].buf_phys);
2092
2093 buf = priv->imsg_ring[mbox].imq_base[rx_slot];
2094 msg_size = le32_to_cpu(desc->msg_info) & TSI721_IMD_BCOUNT;
2095 if (msg_size == 0)
2096 msg_size = RIO_MAX_MSG_SIZE;
2097
2098 memcpy(buf, rx_virt, msg_size);
2099 priv->imsg_ring[mbox].imq_base[rx_slot] = NULL;
2100
2101 desc->msg_info &= cpu_to_le32(~TSI721_IMD_HO);
2102 if (++priv->imsg_ring[mbox].desc_rdptr == priv->imsg_ring[mbox].size)
2103 priv->imsg_ring[mbox].desc_rdptr = 0;
2104
2105 iowrite32(priv->imsg_ring[mbox].desc_rdptr,
2106 priv->regs + TSI721_IBDMAC_DQRP(ch));
2107
2108 /* Return free buffer into the pointer list */
2109 free_ptr = priv->imsg_ring[mbox].imfq_base;
2110 free_ptr[priv->imsg_ring[mbox].fq_wrptr] = cpu_to_le64(rx_phys);
2111
2112 if (++priv->imsg_ring[mbox].fq_wrptr == priv->imsg_ring[mbox].size)
2113 priv->imsg_ring[mbox].fq_wrptr = 0;
2114
2115 iowrite32(priv->imsg_ring[mbox].fq_wrptr,
2116 priv->regs + TSI721_IBDMAC_FQWP(ch));
2117 out:
2118 return buf;
2119 }
2120
2121 /**
2122 * tsi721_messages_init - Initialization of Messaging Engine
2123 * @priv: pointer to tsi721 private data
2124 *
2125 * Configures Tsi721 messaging engine.
2126 */
2127 static int tsi721_messages_init(struct tsi721_device *priv)
2128 {
2129 int ch;
2130
2131 iowrite32(0, priv->regs + TSI721_SMSG_ECC_LOG);
2132 iowrite32(0, priv->regs + TSI721_RETRY_GEN_CNT);
2133 iowrite32(0, priv->regs + TSI721_RETRY_RX_CNT);
2134
2135 /* Set SRIO Message Request/Response Timeout */
2136 iowrite32(TSI721_RQRPTO_VAL, priv->regs + TSI721_RQRPTO);
2137
2138 /* Initialize Inbound Messaging Engine Registers */
2139 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++) {
2140 /* Clear interrupt bits */
2141 iowrite32(TSI721_IBDMAC_INT_MASK,
2142 priv->regs + TSI721_IBDMAC_INT(ch));
2143 /* Clear Status */
2144 iowrite32(0, priv->regs + TSI721_IBDMAC_STS(ch));
2145
2146 iowrite32(TSI721_SMSG_ECC_COR_LOG_MASK,
2147 priv->regs + TSI721_SMSG_ECC_COR_LOG(ch));
2148 iowrite32(TSI721_SMSG_ECC_NCOR_MASK,
2149 priv->regs + TSI721_SMSG_ECC_NCOR(ch));
2150 }
2151
2152 return 0;
2153 }
2154
2155 /**
2156 * tsi721_disable_ints - disables all device interrupts
2157 * @priv: pointer to tsi721 private data
2158 */
2159 static void tsi721_disable_ints(struct tsi721_device *priv)
2160 {
2161 int ch;
2162
2163 /* Disable all device level interrupts */
2164 iowrite32(0, priv->regs + TSI721_DEV_INTE);
2165
2166 /* Disable all Device Channel interrupts */
2167 iowrite32(0, priv->regs + TSI721_DEV_CHAN_INTE);
2168
2169 /* Disable all Inbound Msg Channel interrupts */
2170 for (ch = 0; ch < TSI721_IMSG_CHNUM; ch++)
2171 iowrite32(0, priv->regs + TSI721_IBDMAC_INTE(ch));
2172
2173 /* Disable all Outbound Msg Channel interrupts */
2174 for (ch = 0; ch < TSI721_OMSG_CHNUM; ch++)
2175 iowrite32(0, priv->regs + TSI721_OBDMAC_INTE(ch));
2176
2177 /* Disable all general messaging interrupts */
2178 iowrite32(0, priv->regs + TSI721_SMSG_INTE);
2179
2180 /* Disable all BDMA Channel interrupts */
2181 for (ch = 0; ch < TSI721_DMA_MAXCH; ch++)
2182 iowrite32(0,
2183 priv->regs + TSI721_DMAC_BASE(ch) + TSI721_DMAC_INTE);
2184
2185 /* Disable all general BDMA interrupts */
2186 iowrite32(0, priv->regs + TSI721_BDMA_INTE);
2187
2188 /* Disable all SRIO Channel interrupts */
2189 for (ch = 0; ch < TSI721_SRIO_MAXCH; ch++)
2190 iowrite32(0, priv->regs + TSI721_SR_CHINTE(ch));
2191
2192 /* Disable all general SR2PC interrupts */
2193 iowrite32(0, priv->regs + TSI721_SR2PC_GEN_INTE);
2194
2195 /* Disable all PC2SR interrupts */
2196 iowrite32(0, priv->regs + TSI721_PC2SR_INTE);
2197
2198 /* Disable all I2C interrupts */
2199 iowrite32(0, priv->regs + TSI721_I2C_INT_ENABLE);
2200
2201 /* Disable SRIO MAC interrupts */
2202 iowrite32(0, priv->regs + TSI721_RIO_EM_INT_ENABLE);
2203 iowrite32(0, priv->regs + TSI721_RIO_EM_DEV_INT_EN);
2204 }
2205
2206 /**
2207 * tsi721_setup_mport - Setup Tsi721 as RapidIO subsystem master port
2208 * @priv: pointer to tsi721 private data
2209 *
2210 * Configures Tsi721 as RapidIO master port.
2211 */
2212 static int tsi721_setup_mport(struct tsi721_device *priv)
2213 {
2214 struct pci_dev *pdev = priv->pdev;
2215 int err = 0;
2216 struct rio_ops *ops;
2217
2218 struct rio_mport *mport;
2219
2220 ops = kzalloc(sizeof(struct rio_ops), GFP_KERNEL);
2221 if (!ops) {
2222 dev_dbg(&pdev->dev, "Unable to allocate memory for rio_ops\n");
2223 return -ENOMEM;
2224 }
2225
2226 ops->lcread = tsi721_lcread;
2227 ops->lcwrite = tsi721_lcwrite;
2228 ops->cread = tsi721_cread_dma;
2229 ops->cwrite = tsi721_cwrite_dma;
2230 ops->dsend = tsi721_dsend;
2231 ops->open_inb_mbox = tsi721_open_inb_mbox;
2232 ops->close_inb_mbox = tsi721_close_inb_mbox;
2233 ops->open_outb_mbox = tsi721_open_outb_mbox;
2234 ops->close_outb_mbox = tsi721_close_outb_mbox;
2235 ops->add_outb_message = tsi721_add_outb_message;
2236 ops->add_inb_buffer = tsi721_add_inb_buffer;
2237 ops->get_inb_message = tsi721_get_inb_message;
2238 ops->map_inb = tsi721_rio_map_inb_mem;
2239 ops->unmap_inb = tsi721_rio_unmap_inb_mem;
2240
2241 mport = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
2242 if (!mport) {
2243 kfree(ops);
2244 dev_dbg(&pdev->dev, "Unable to allocate memory for mport\n");
2245 return -ENOMEM;
2246 }
2247
2248 mport->ops = ops;
2249 mport->index = 0;
2250 mport->sys_size = 0; /* small system */
2251 mport->phy_type = RIO_PHY_SERIAL;
2252 mport->priv = (void *)priv;
2253 mport->phys_efptr = 0x100;
2254 mport->dev.parent = &pdev->dev;
2255 priv->mport = mport;
2256
2257 INIT_LIST_HEAD(&mport->dbells);
2258
2259 rio_init_dbell_res(&mport->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
2260 rio_init_mbox_res(&mport->riores[RIO_INB_MBOX_RESOURCE], 0, 3);
2261 rio_init_mbox_res(&mport->riores[RIO_OUTB_MBOX_RESOURCE], 0, 3);
2262 snprintf(mport->name, RIO_MAX_MPORT_NAME, "%s(%s)",
2263 dev_driver_string(&pdev->dev), dev_name(&pdev->dev));
2264
2265 /* Hook up interrupt handler */
2266
2267 #ifdef CONFIG_PCI_MSI
2268 if (!tsi721_enable_msix(priv))
2269 priv->flags |= TSI721_USING_MSIX;
2270 else if (!pci_enable_msi(pdev))
2271 priv->flags |= TSI721_USING_MSI;
2272 else
2273 dev_info(&pdev->dev,
2274 "MSI/MSI-X is not available. Using legacy INTx.\n");
2275 #endif /* CONFIG_PCI_MSI */
2276
2277 err = tsi721_request_irq(mport);
2278
2279 if (!err) {
2280 tsi721_interrupts_init(priv);
2281 ops->pwenable = tsi721_pw_enable;
2282 } else {
2283 dev_err(&pdev->dev, "Unable to get assigned PCI IRQ "
2284 "vector %02X err=0x%x\n", pdev->irq, err);
2285 goto err_exit;
2286 }
2287
2288 #ifdef CONFIG_RAPIDIO_DMA_ENGINE
2289 tsi721_register_dma(priv);
2290 #endif
2291 /* Enable SRIO link */
2292 iowrite32(ioread32(priv->regs + TSI721_DEVCTL) |
2293 TSI721_DEVCTL_SRBOOT_CMPL,
2294 priv->regs + TSI721_DEVCTL);
2295
2296 rio_register_mport(mport);
2297
2298 if (mport->host_deviceid >= 0)
2299 iowrite32(RIO_PORT_GEN_HOST | RIO_PORT_GEN_MASTER |
2300 RIO_PORT_GEN_DISCOVERED,
2301 priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2302 else
2303 iowrite32(0, priv->regs + (0x100 + RIO_PORT_GEN_CTL_CSR));
2304
2305 return 0;
2306
2307 err_exit:
2308 kfree(mport);
2309 kfree(ops);
2310 return err;
2311 }
2312
2313 static int tsi721_probe(struct pci_dev *pdev,
2314 const struct pci_device_id *id)
2315 {
2316 struct tsi721_device *priv;
2317 int err;
2318
2319 priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL);
2320 if (priv == NULL) {
2321 dev_err(&pdev->dev, "Failed to allocate memory for device\n");
2322 err = -ENOMEM;
2323 goto err_exit;
2324 }
2325
2326 err = pci_enable_device(pdev);
2327 if (err) {
2328 dev_err(&pdev->dev, "Failed to enable PCI device\n");
2329 goto err_clean;
2330 }
2331
2332 priv->pdev = pdev;
2333
2334 #ifdef DEBUG
2335 {
2336 int i;
2337 for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
2338 dev_dbg(&pdev->dev, "res[%d] @ 0x%llx (0x%lx, 0x%lx)\n",
2339 i, (unsigned long long)pci_resource_start(pdev, i),
2340 (unsigned long)pci_resource_len(pdev, i),
2341 pci_resource_flags(pdev, i));
2342 }
2343 }
2344 #endif
2345 /*
2346 * Verify BAR configuration
2347 */
2348
2349 /* BAR_0 (registers) must be 512KB+ in 32-bit address space */
2350 if (!(pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM) ||
2351 pci_resource_flags(pdev, BAR_0) & IORESOURCE_MEM_64 ||
2352 pci_resource_len(pdev, BAR_0) < TSI721_REG_SPACE_SIZE) {
2353 dev_err(&pdev->dev,
2354 "Missing or misconfigured CSR BAR0, aborting.\n");
2355 err = -ENODEV;
2356 goto err_disable_pdev;
2357 }
2358
2359 /* BAR_1 (outbound doorbells) must be 16MB+ in 32-bit address space */
2360 if (!(pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM) ||
2361 pci_resource_flags(pdev, BAR_1) & IORESOURCE_MEM_64 ||
2362 pci_resource_len(pdev, BAR_1) < TSI721_DB_WIN_SIZE) {
2363 dev_err(&pdev->dev,
2364 "Missing or misconfigured Doorbell BAR1, aborting.\n");
2365 err = -ENODEV;
2366 goto err_disable_pdev;
2367 }
2368
2369 /*
2370 * BAR_2 and BAR_4 (outbound translation) must be in 64-bit PCIe address
2371 * space.
2372 * NOTE: BAR_2 and BAR_4 are not used by this version of driver.
2373 * It may be a good idea to keep them disabled using HW configuration
2374 * to save PCI memory space.
2375 */
2376 if ((pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM) &&
2377 (pci_resource_flags(pdev, BAR_2) & IORESOURCE_MEM_64)) {
2378 dev_info(&pdev->dev, "Outbound BAR2 is not used but enabled.\n");
2379 }
2380
2381 if ((pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM) &&
2382 (pci_resource_flags(pdev, BAR_4) & IORESOURCE_MEM_64)) {
2383 dev_info(&pdev->dev, "Outbound BAR4 is not used but enabled.\n");
2384 }
2385
2386 err = pci_request_regions(pdev, DRV_NAME);
2387 if (err) {
2388 dev_err(&pdev->dev, "Cannot obtain PCI resources, "
2389 "aborting.\n");
2390 goto err_disable_pdev;
2391 }
2392
2393 pci_set_master(pdev);
2394
2395 priv->regs = pci_ioremap_bar(pdev, BAR_0);
2396 if (!priv->regs) {
2397 dev_err(&pdev->dev,
2398 "Unable to map device registers space, aborting\n");
2399 err = -ENOMEM;
2400 goto err_free_res;
2401 }
2402
2403 priv->odb_base = pci_ioremap_bar(pdev, BAR_1);
2404 if (!priv->odb_base) {
2405 dev_err(&pdev->dev,
2406 "Unable to map outbound doorbells space, aborting\n");
2407 err = -ENOMEM;
2408 goto err_unmap_bars;
2409 }
2410
2411 /* Configure DMA attributes. */
2412 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
2413 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2414 if (err) {
2415 dev_info(&pdev->dev, "Unable to set DMA mask\n");
2416 goto err_unmap_bars;
2417 }
2418
2419 if (pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)))
2420 dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
2421 } else {
2422 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2423 if (err)
2424 dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
2425 }
2426
2427 BUG_ON(!pci_is_pcie(pdev));
2428
2429 /* Clear "no snoop" and "relaxed ordering" bits, use default MRRS. */
2430 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
2431 PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_RELAX_EN |
2432 PCI_EXP_DEVCTL_NOSNOOP_EN,
2433 PCI_EXP_DEVCTL_READRQ_512B);
2434
2435 /* Adjust PCIe completion timeout. */
2436 pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL2, 0xf, 0x2);
2437
2438 /*
2439 * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block
2440 */
2441 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0x01);
2442 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXTBL,
2443 TSI721_MSIXTBL_OFFSET);
2444 pci_write_config_dword(pdev, TSI721_PCIECFG_MSIXPBA,
2445 TSI721_MSIXPBA_OFFSET);
2446 pci_write_config_dword(pdev, TSI721_PCIECFG_EPCTL, 0);
2447 /* End of FIXUP */
2448
2449 tsi721_disable_ints(priv);
2450
2451 tsi721_init_pc2sr_mapping(priv);
2452 tsi721_init_sr2pc_mapping(priv);
2453
2454 if (tsi721_bdma_maint_init(priv)) {
2455 dev_err(&pdev->dev, "BDMA initialization failed, aborting\n");
2456 err = -ENOMEM;
2457 goto err_unmap_bars;
2458 }
2459
2460 err = tsi721_doorbell_init(priv);
2461 if (err)
2462 goto err_free_bdma;
2463
2464 tsi721_port_write_init(priv);
2465
2466 err = tsi721_messages_init(priv);
2467 if (err)
2468 goto err_free_consistent;
2469
2470 err = tsi721_setup_mport(priv);
2471 if (err)
2472 goto err_free_consistent;
2473
2474 return 0;
2475
2476 err_free_consistent:
2477 tsi721_doorbell_free(priv);
2478 err_free_bdma:
2479 tsi721_bdma_maint_free(priv);
2480 err_unmap_bars:
2481 if (priv->regs)
2482 iounmap(priv->regs);
2483 if (priv->odb_base)
2484 iounmap(priv->odb_base);
2485 err_free_res:
2486 pci_release_regions(pdev);
2487 pci_clear_master(pdev);
2488 err_disable_pdev:
2489 pci_disable_device(pdev);
2490 err_clean:
2491 kfree(priv);
2492 err_exit:
2493 return err;
2494 }
2495
2496 static const struct pci_device_id tsi721_pci_tbl[] = {
2497 { PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) },
2498 { 0, } /* terminate list */
2499 };
2500
2501 MODULE_DEVICE_TABLE(pci, tsi721_pci_tbl);
2502
2503 static struct pci_driver tsi721_driver = {
2504 .name = "tsi721",
2505 .id_table = tsi721_pci_tbl,
2506 .probe = tsi721_probe,
2507 };
2508
2509 static int __init tsi721_init(void)
2510 {
2511 return pci_register_driver(&tsi721_driver);
2512 }
2513
2514 device_initcall(tsi721_init);
2515
2516 MODULE_DESCRIPTION("IDT Tsi721 PCIExpress-to-SRIO bridge driver");
2517 MODULE_AUTHOR("Integrated Device Technology, Inc.");
2518 MODULE_LICENSE("GPL");
Linux with added FPC-III support