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Char: cyclades, remove bottom half processing
[linux-2.6/mini2440.git] / drivers / scsi / qlogicpti.c
blob7a2e7986b038f16185875fe95bc8e2a32acc80a4
1 /* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
2 *
3 * Copyright (C) 1996, 2006 David S. Miller (davem@davemloft.net)
4 *
5 * A lot of this driver was directly stolen from Erik H. Moe's PCI
6 * Qlogic ISP driver. Mucho kudos to him for this code.
7 *
8 * An even bigger kudos to John Grana at Performance Technologies
9 * for providing me with the hardware to write this driver, you rule
10 * John you really do.
11 *
12 * May, 2, 1997: Added support for QLGC,isp --jj
13 */
14
15 #include <linux/kernel.h>
16 #include <linux/delay.h>
17 #include <linux/types.h>
18 #include <linux/string.h>
19 #include <linux/slab.h>
20 #include <linux/blkdev.h>
21 #include <linux/proc_fs.h>
22 #include <linux/stat.h>
23 #include <linux/init.h>
24 #include <linux/spinlock.h>
25 #include <linux/interrupt.h>
26 #include <linux/module.h>
27 #include <linux/jiffies.h>
28
29 #include <asm/byteorder.h>
30
31 #include "qlogicpti.h"
32
33 #include <asm/sbus.h>
34 #include <asm/dma.h>
35 #include <asm/system.h>
36 #include <asm/ptrace.h>
37 #include <asm/pgtable.h>
38 #include <asm/oplib.h>
39 #include <asm/io.h>
40 #include <asm/irq.h>
41
42 #include <scsi/scsi.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_eh.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_host.h>
48
49 #define MAX_TARGETS 16
50 #define MAX_LUNS 8 /* 32 for 1.31 F/W */
51
52 #define DEFAULT_LOOP_COUNT 10000
53
54 #include "qlogicpti_asm.c"
55
56 static struct qlogicpti *qptichain = NULL;
57 static DEFINE_SPINLOCK(qptichain_lock);
58
59 #define PACKB(a, b) (((a)<<4)|(b))
60
61 static const u_char mbox_param[] = {
62 PACKB(1, 1), /* MBOX_NO_OP */
63 PACKB(5, 5), /* MBOX_LOAD_RAM */
64 PACKB(2, 0), /* MBOX_EXEC_FIRMWARE */
65 PACKB(5, 5), /* MBOX_DUMP_RAM */
66 PACKB(3, 3), /* MBOX_WRITE_RAM_WORD */
67 PACKB(2, 3), /* MBOX_READ_RAM_WORD */
68 PACKB(6, 6), /* MBOX_MAILBOX_REG_TEST */
69 PACKB(2, 3), /* MBOX_VERIFY_CHECKSUM */
70 PACKB(1, 3), /* MBOX_ABOUT_FIRMWARE */
71 PACKB(0, 0), /* 0x0009 */
72 PACKB(0, 0), /* 0x000a */
73 PACKB(0, 0), /* 0x000b */
74 PACKB(0, 0), /* 0x000c */
75 PACKB(0, 0), /* 0x000d */
76 PACKB(1, 2), /* MBOX_CHECK_FIRMWARE */
77 PACKB(0, 0), /* 0x000f */
78 PACKB(5, 5), /* MBOX_INIT_REQ_QUEUE */
79 PACKB(6, 6), /* MBOX_INIT_RES_QUEUE */
80 PACKB(4, 4), /* MBOX_EXECUTE_IOCB */
81 PACKB(2, 2), /* MBOX_WAKE_UP */
82 PACKB(1, 6), /* MBOX_STOP_FIRMWARE */
83 PACKB(4, 4), /* MBOX_ABORT */
84 PACKB(2, 2), /* MBOX_ABORT_DEVICE */
85 PACKB(3, 3), /* MBOX_ABORT_TARGET */
86 PACKB(2, 2), /* MBOX_BUS_RESET */
87 PACKB(2, 3), /* MBOX_STOP_QUEUE */
88 PACKB(2, 3), /* MBOX_START_QUEUE */
89 PACKB(2, 3), /* MBOX_SINGLE_STEP_QUEUE */
90 PACKB(2, 3), /* MBOX_ABORT_QUEUE */
91 PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_STATUS */
92 PACKB(0, 0), /* 0x001e */
93 PACKB(1, 3), /* MBOX_GET_FIRMWARE_STATUS */
94 PACKB(1, 2), /* MBOX_GET_INIT_SCSI_ID */
95 PACKB(1, 2), /* MBOX_GET_SELECT_TIMEOUT */
96 PACKB(1, 3), /* MBOX_GET_RETRY_COUNT */
97 PACKB(1, 2), /* MBOX_GET_TAG_AGE_LIMIT */
98 PACKB(1, 2), /* MBOX_GET_CLOCK_RATE */
99 PACKB(1, 2), /* MBOX_GET_ACT_NEG_STATE */
100 PACKB(1, 2), /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
101 PACKB(1, 3), /* MBOX_GET_SBUS_PARAMS */
102 PACKB(2, 4), /* MBOX_GET_TARGET_PARAMS */
103 PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_PARAMS */
104 PACKB(0, 0), /* 0x002a */
105 PACKB(0, 0), /* 0x002b */
106 PACKB(0, 0), /* 0x002c */
107 PACKB(0, 0), /* 0x002d */
108 PACKB(0, 0), /* 0x002e */
109 PACKB(0, 0), /* 0x002f */
110 PACKB(2, 2), /* MBOX_SET_INIT_SCSI_ID */
111 PACKB(2, 2), /* MBOX_SET_SELECT_TIMEOUT */
112 PACKB(3, 3), /* MBOX_SET_RETRY_COUNT */
113 PACKB(2, 2), /* MBOX_SET_TAG_AGE_LIMIT */
114 PACKB(2, 2), /* MBOX_SET_CLOCK_RATE */
115 PACKB(2, 2), /* MBOX_SET_ACTIVE_NEG_STATE */
116 PACKB(2, 2), /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
117 PACKB(3, 3), /* MBOX_SET_SBUS_CONTROL_PARAMS */
118 PACKB(4, 4), /* MBOX_SET_TARGET_PARAMS */
119 PACKB(4, 4), /* MBOX_SET_DEV_QUEUE_PARAMS */
120 PACKB(0, 0), /* 0x003a */
121 PACKB(0, 0), /* 0x003b */
122 PACKB(0, 0), /* 0x003c */
123 PACKB(0, 0), /* 0x003d */
124 PACKB(0, 0), /* 0x003e */
125 PACKB(0, 0), /* 0x003f */
126 PACKB(0, 0), /* 0x0040 */
127 PACKB(0, 0), /* 0x0041 */
128 PACKB(0, 0) /* 0x0042 */
129 };
130
131 #define MAX_MBOX_COMMAND ARRAY_SIZE(mbox_param)
132
133 /* queue length's _must_ be power of two: */
134 #define QUEUE_DEPTH(in, out, ql) ((in - out) & (ql))
135 #define REQ_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, \
136 QLOGICPTI_REQ_QUEUE_LEN)
137 #define RES_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
138
139 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
140 {
141 sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
142 qpti->qregs + SBUS_CTRL);
143 }
144
145 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
146 {
147 sbus_writew(0, qpti->qregs + SBUS_CTRL);
148 }
149
150 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
151 {
152 u16 val;
153 u8 bursts = qpti->bursts;
154
155 #if 0 /* It appears that at least PTI cards do not support
156 * 64-byte bursts and that setting the B64 bit actually
157 * is a nop and the chip ends up using the smallest burst
158 * size. -DaveM
159 */
160 if (sbus_can_burst64(qpti->sdev) && (bursts & DMA_BURST64)) {
161 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
162 } else
163 #endif
164 if (bursts & DMA_BURST32) {
165 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
166 } else if (bursts & DMA_BURST16) {
167 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
168 } else if (bursts & DMA_BURST8) {
169 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
170 } else {
171 val = 0; /* No sbus bursts for you... */
172 }
173 sbus_writew(val, qpti->qregs + SBUS_CFG1);
174 }
175
176 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
177 {
178 int loop_count;
179 u16 tmp;
180
181 if (mbox_param[param[0]] == 0)
182 return 1;
183
184 /* Set SBUS semaphore. */
185 tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
186 tmp |= SBUS_SEMAPHORE_LCK;
187 sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
188
189 /* Wait for host IRQ bit to clear. */
190 loop_count = DEFAULT_LOOP_COUNT;
191 while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
192 barrier();
193 cpu_relax();
194 }
195 if (!loop_count)
196 printk(KERN_EMERG "qlogicpti%d: mbox_command loop timeout #1\n",
197 qpti->qpti_id);
198
199 /* Write mailbox command registers. */
200 switch (mbox_param[param[0]] >> 4) {
201 case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
202 case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
203 case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
204 case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
205 case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
206 case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
207 }
208
209 /* Clear RISC interrupt. */
210 tmp = sbus_readw(qpti->qregs + HCCTRL);
211 tmp |= HCCTRL_CRIRQ;
212 sbus_writew(tmp, qpti->qregs + HCCTRL);
213
214 /* Clear SBUS semaphore. */
215 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
216
217 /* Set HOST interrupt. */
218 tmp = sbus_readw(qpti->qregs + HCCTRL);
219 tmp |= HCCTRL_SHIRQ;
220 sbus_writew(tmp, qpti->qregs + HCCTRL);
221
222 /* Wait for HOST interrupt clears. */
223 loop_count = DEFAULT_LOOP_COUNT;
224 while (--loop_count &&
225 (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
226 udelay(20);
227 if (!loop_count)
228 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #2\n",
229 qpti->qpti_id, param[0]);
230
231 /* Wait for SBUS semaphore to get set. */
232 loop_count = DEFAULT_LOOP_COUNT;
233 while (--loop_count &&
234 !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
235 udelay(20);
236
237 /* Workaround for some buggy chips. */
238 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
239 break;
240 }
241 if (!loop_count)
242 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #3\n",
243 qpti->qpti_id, param[0]);
244
245 /* Wait for MBOX busy condition to go away. */
246 loop_count = DEFAULT_LOOP_COUNT;
247 while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
248 udelay(20);
249 if (!loop_count)
250 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #4\n",
251 qpti->qpti_id, param[0]);
252
253 /* Read back output parameters. */
254 switch (mbox_param[param[0]] & 0xf) {
255 case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
256 case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
257 case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
258 case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
259 case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
260 case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
261 }
262
263 /* Clear RISC interrupt. */
264 tmp = sbus_readw(qpti->qregs + HCCTRL);
265 tmp |= HCCTRL_CRIRQ;
266 sbus_writew(tmp, qpti->qregs + HCCTRL);
267
268 /* Release SBUS semaphore. */
269 tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
270 tmp &= ~(SBUS_SEMAPHORE_LCK);
271 sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
272
273 /* We're done. */
274 return 0;
275 }
276
277 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
278 {
279 int i;
280
281 qpti->host_param.initiator_scsi_id = qpti->scsi_id;
282 qpti->host_param.bus_reset_delay = 3;
283 qpti->host_param.retry_count = 0;
284 qpti->host_param.retry_delay = 5;
285 qpti->host_param.async_data_setup_time = 3;
286 qpti->host_param.req_ack_active_negation = 1;
287 qpti->host_param.data_line_active_negation = 1;
288 qpti->host_param.data_dma_burst_enable = 1;
289 qpti->host_param.command_dma_burst_enable = 1;
290 qpti->host_param.tag_aging = 8;
291 qpti->host_param.selection_timeout = 250;
292 qpti->host_param.max_queue_depth = 256;
293
294 for(i = 0; i < MAX_TARGETS; i++) {
295 /*
296 * disconnect, parity, arq, reneg on reset, and, oddly enough
297 * tags...the midlayer's notion of tagged support has to match
298 * our device settings, and since we base whether we enable a
299 * tag on a per-cmnd basis upon what the midlayer sez, we
300 * actually enable the capability here.
301 */
302 qpti->dev_param[i].device_flags = 0xcd;
303 qpti->dev_param[i].execution_throttle = 16;
304 if (qpti->ultra) {
305 qpti->dev_param[i].synchronous_period = 12;
306 qpti->dev_param[i].synchronous_offset = 8;
307 } else {
308 qpti->dev_param[i].synchronous_period = 25;
309 qpti->dev_param[i].synchronous_offset = 12;
310 }
311 qpti->dev_param[i].device_enable = 1;
312 }
313 }
314
315 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
316 {
317 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
318 u_short param[6];
319 unsigned short risc_code_addr;
320 int loop_count, i;
321 unsigned long flags;
322
323 risc_code_addr = 0x1000; /* all load addresses are at 0x1000 */
324
325 spin_lock_irqsave(host->host_lock, flags);
326
327 sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
328
329 /* Only reset the scsi bus if it is not free. */
330 if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
331 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
332 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
333 udelay(400);
334 }
335
336 sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
337 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
338 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
339
340 loop_count = DEFAULT_LOOP_COUNT;
341 while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
342 udelay(20);
343 if (!loop_count)
344 printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
345 qpti->qpti_id);
346
347 sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
348 set_sbus_cfg1(qpti);
349 qlogicpti_enable_irqs(qpti);
350
351 if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
352 qpti->ultra = 1;
353 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
354 qpti->qregs + RISC_MTREG);
355 } else {
356 qpti->ultra = 0;
357 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
358 qpti->qregs + RISC_MTREG);
359 }
360
361 /* reset adapter and per-device default values. */
362 /* do it after finding out whether we're ultra mode capable */
363 qlogicpti_set_hostdev_defaults(qpti);
364
365 /* Release the RISC processor. */
366 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
367
368 /* Get RISC to start executing the firmware code. */
369 param[0] = MBOX_EXEC_FIRMWARE;
370 param[1] = risc_code_addr;
371 if (qlogicpti_mbox_command(qpti, param, 1)) {
372 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
373 qpti->qpti_id);
374 spin_unlock_irqrestore(host->host_lock, flags);
375 return 1;
376 }
377
378 /* Set initiator scsi ID. */
379 param[0] = MBOX_SET_INIT_SCSI_ID;
380 param[1] = qpti->host_param.initiator_scsi_id;
381 if (qlogicpti_mbox_command(qpti, param, 1) ||
382 (param[0] != MBOX_COMMAND_COMPLETE)) {
383 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
384 qpti->qpti_id);
385 spin_unlock_irqrestore(host->host_lock, flags);
386 return 1;
387 }
388
389 /* Initialize state of the queues, both hw and sw. */
390 qpti->req_in_ptr = qpti->res_out_ptr = 0;
391
392 param[0] = MBOX_INIT_RES_QUEUE;
393 param[1] = RES_QUEUE_LEN + 1;
394 param[2] = (u_short) (qpti->res_dvma >> 16);
395 param[3] = (u_short) (qpti->res_dvma & 0xffff);
396 param[4] = param[5] = 0;
397 if (qlogicpti_mbox_command(qpti, param, 1)) {
398 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
399 qpti->qpti_id);
400 spin_unlock_irqrestore(host->host_lock, flags);
401 return 1;
402 }
403
404 param[0] = MBOX_INIT_REQ_QUEUE;
405 param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
406 param[2] = (u_short) (qpti->req_dvma >> 16);
407 param[3] = (u_short) (qpti->req_dvma & 0xffff);
408 param[4] = param[5] = 0;
409 if (qlogicpti_mbox_command(qpti, param, 1)) {
410 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
411 qpti->qpti_id);
412 spin_unlock_irqrestore(host->host_lock, flags);
413 return 1;
414 }
415
416 param[0] = MBOX_SET_RETRY_COUNT;
417 param[1] = qpti->host_param.retry_count;
418 param[2] = qpti->host_param.retry_delay;
419 qlogicpti_mbox_command(qpti, param, 0);
420
421 param[0] = MBOX_SET_TAG_AGE_LIMIT;
422 param[1] = qpti->host_param.tag_aging;
423 qlogicpti_mbox_command(qpti, param, 0);
424
425 for (i = 0; i < MAX_TARGETS; i++) {
426 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
427 param[1] = (i << 8);
428 qlogicpti_mbox_command(qpti, param, 0);
429 }
430
431 param[0] = MBOX_GET_FIRMWARE_STATUS;
432 qlogicpti_mbox_command(qpti, param, 0);
433
434 param[0] = MBOX_SET_SELECT_TIMEOUT;
435 param[1] = qpti->host_param.selection_timeout;
436 qlogicpti_mbox_command(qpti, param, 0);
437
438 for (i = 0; i < MAX_TARGETS; i++) {
439 param[0] = MBOX_SET_TARGET_PARAMS;
440 param[1] = (i << 8);
441 param[2] = (qpti->dev_param[i].device_flags << 8);
442 /*
443 * Since we're now loading 1.31 f/w, force narrow/async.
444 */
445 param[2] |= 0xc0;
446 param[3] = 0; /* no offset, we do not have sync mode yet */
447 qlogicpti_mbox_command(qpti, param, 0);
448 }
449
450 /*
451 * Always (sigh) do an initial bus reset (kicks f/w).
452 */
453 param[0] = MBOX_BUS_RESET;
454 param[1] = qpti->host_param.bus_reset_delay;
455 qlogicpti_mbox_command(qpti, param, 0);
456 qpti->send_marker = 1;
457
458 spin_unlock_irqrestore(host->host_lock, flags);
459 return 0;
460 }
461
462 #define PTI_RESET_LIMIT 400
463
464 static int __devinit qlogicpti_load_firmware(struct qlogicpti *qpti)
465 {
466 struct Scsi_Host *host = qpti->qhost;
467 unsigned short csum = 0;
468 unsigned short param[6];
469 unsigned short *risc_code, risc_code_addr, risc_code_length;
470 unsigned long flags;
471 int i, timeout;
472
473 risc_code = &sbus_risc_code01[0];
474 risc_code_addr = 0x1000; /* all f/w modules load at 0x1000 */
475 risc_code_length = sbus_risc_code_length01;
476
477 spin_lock_irqsave(host->host_lock, flags);
478
479 /* Verify the checksum twice, one before loading it, and once
480 * afterwards via the mailbox commands.
481 */
482 for (i = 0; i < risc_code_length; i++)
483 csum += risc_code[i];
484 if (csum) {
485 spin_unlock_irqrestore(host->host_lock, flags);
486 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
487 qpti->qpti_id);
488 return 1;
489 }
490 sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
491 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
492 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
493 timeout = PTI_RESET_LIMIT;
494 while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
495 udelay(20);
496 if (!timeout) {
497 spin_unlock_irqrestore(host->host_lock, flags);
498 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
499 return 1;
500 }
501
502 sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
503 mdelay(1);
504
505 sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
506 set_sbus_cfg1(qpti);
507 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
508
509 if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
510 qpti->ultra = 1;
511 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
512 qpti->qregs + RISC_MTREG);
513 } else {
514 qpti->ultra = 0;
515 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
516 qpti->qregs + RISC_MTREG);
517 }
518
519 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
520
521 /* Pin lines are only stable while RISC is paused. */
522 sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
523 if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
524 qpti->differential = 1;
525 else
526 qpti->differential = 0;
527 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
528
529 /* This shouldn't be necessary- we've reset things so we should be
530 running from the ROM now.. */
531
532 param[0] = MBOX_STOP_FIRMWARE;
533 param[1] = param[2] = param[3] = param[4] = param[5] = 0;
534 if (qlogicpti_mbox_command(qpti, param, 1)) {
535 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
536 qpti->qpti_id);
537 spin_unlock_irqrestore(host->host_lock, flags);
538 return 1;
539 }
540
541 /* Load it up.. */
542 for (i = 0; i < risc_code_length; i++) {
543 param[0] = MBOX_WRITE_RAM_WORD;
544 param[1] = risc_code_addr + i;
545 param[2] = risc_code[i];
546 if (qlogicpti_mbox_command(qpti, param, 1) ||
547 param[0] != MBOX_COMMAND_COMPLETE) {
548 printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
549 qpti->qpti_id);
550 spin_unlock_irqrestore(host->host_lock, flags);
551 return 1;
552 }
553 }
554
555 /* Reset the ISP again. */
556 sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
557 mdelay(1);
558
559 qlogicpti_enable_irqs(qpti);
560 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
561 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
562
563 /* Ask ISP to verify the checksum of the new code. */
564 param[0] = MBOX_VERIFY_CHECKSUM;
565 param[1] = risc_code_addr;
566 if (qlogicpti_mbox_command(qpti, param, 1) ||
567 (param[0] != MBOX_COMMAND_COMPLETE)) {
568 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
569 qpti->qpti_id);
570 spin_unlock_irqrestore(host->host_lock, flags);
571 return 1;
572 }
573
574 /* Start using newly downloaded firmware. */
575 param[0] = MBOX_EXEC_FIRMWARE;
576 param[1] = risc_code_addr;
577 qlogicpti_mbox_command(qpti, param, 1);
578
579 param[0] = MBOX_ABOUT_FIRMWARE;
580 if (qlogicpti_mbox_command(qpti, param, 1) ||
581 (param[0] != MBOX_COMMAND_COMPLETE)) {
582 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
583 qpti->qpti_id);
584 spin_unlock_irqrestore(host->host_lock, flags);
585 return 1;
586 }
587
588 /* Snag the major and minor revisions from the result. */
589 qpti->fware_majrev = param[1];
590 qpti->fware_minrev = param[2];
591 qpti->fware_micrev = param[3];
592
593 /* Set the clock rate */
594 param[0] = MBOX_SET_CLOCK_RATE;
595 param[1] = qpti->clock;
596 if (qlogicpti_mbox_command(qpti, param, 1) ||
597 (param[0] != MBOX_COMMAND_COMPLETE)) {
598 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
599 qpti->qpti_id);
600 spin_unlock_irqrestore(host->host_lock, flags);
601 return 1;
602 }
603
604 if (qpti->is_pti != 0) {
605 /* Load scsi initiator ID and interrupt level into sbus static ram. */
606 param[0] = MBOX_WRITE_RAM_WORD;
607 param[1] = 0xff80;
608 param[2] = (unsigned short) qpti->scsi_id;
609 qlogicpti_mbox_command(qpti, param, 1);
610
611 param[0] = MBOX_WRITE_RAM_WORD;
612 param[1] = 0xff00;
613 param[2] = (unsigned short) 3;
614 qlogicpti_mbox_command(qpti, param, 1);
615 }
616
617 spin_unlock_irqrestore(host->host_lock, flags);
618 return 0;
619 }
620
621 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
622 {
623 int curstat = sbus_readb(qpti->sreg);
624
625 curstat &= 0xf0;
626 if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
627 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
628 if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
629 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
630 if (curstat != qpti->swsreg) {
631 int error = 0;
632 if (curstat & SREG_FUSE) {
633 error++;
634 printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
635 }
636 if (curstat & SREG_TPOWER) {
637 error++;
638 printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
639 }
640 if (qpti->differential &&
641 (curstat & SREG_DSENSE) != SREG_DSENSE) {
642 error++;
643 printk("qlogicpti%d: You have a single ended device on a "
644 "differential bus! Please fix!\n", qpti->qpti_id);
645 }
646 qpti->swsreg = curstat;
647 return error;
648 }
649 return 0;
650 }
651
652 static irqreturn_t qpti_intr(int irq, void *dev_id);
653
654 static void __init qpti_chain_add(struct qlogicpti *qpti)
655 {
656 spin_lock_irq(&qptichain_lock);
657 if (qptichain != NULL) {
658 struct qlogicpti *qlink = qptichain;
659
660 while(qlink->next)
661 qlink = qlink->next;
662 qlink->next = qpti;
663 } else {
664 qptichain = qpti;
665 }
666 qpti->next = NULL;
667 spin_unlock_irq(&qptichain_lock);
668 }
669
670 static void __init qpti_chain_del(struct qlogicpti *qpti)
671 {
672 spin_lock_irq(&qptichain_lock);
673 if (qptichain == qpti) {
674 qptichain = qpti->next;
675 } else {
676 struct qlogicpti *qlink = qptichain;
677 while(qlink->next != qpti)
678 qlink = qlink->next;
679 qlink->next = qpti->next;
680 }
681 qpti->next = NULL;
682 spin_unlock_irq(&qptichain_lock);
683 }
684
685 static int __init qpti_map_regs(struct qlogicpti *qpti)
686 {
687 struct sbus_dev *sdev = qpti->sdev;
688
689 qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
690 sdev->reg_addrs[0].reg_size,
691 "PTI Qlogic/ISP");
692 if (!qpti->qregs) {
693 printk("PTI: Qlogic/ISP registers are unmappable\n");
694 return -1;
695 }
696 if (qpti->is_pti) {
697 qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
698 sizeof(unsigned char),
699 "PTI Qlogic/ISP statreg");
700 if (!qpti->sreg) {
701 printk("PTI: Qlogic/ISP status register is unmappable\n");
702 return -1;
703 }
704 }
705 return 0;
706 }
707
708 static int __init qpti_register_irq(struct qlogicpti *qpti)
709 {
710 struct sbus_dev *sdev = qpti->sdev;
711
712 qpti->qhost->irq = qpti->irq = sdev->irqs[0];
713
714 /* We used to try various overly-clever things to
715 * reduce the interrupt processing overhead on
716 * sun4c/sun4m when multiple PTI's shared the
717 * same IRQ. It was too complex and messy to
718 * sanely maintain.
719 */
720 if (request_irq(qpti->irq, qpti_intr,
721 IRQF_SHARED, "Qlogic/PTI", qpti))
722 goto fail;
723
724 printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
725
726 return 0;
727
728 fail:
729 printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
730 return -1;
731 }
732
733 static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
734 {
735 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
736 "initiator-id",
737 -1);
738 if (qpti->scsi_id == -1)
739 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
740 "scsi-initiator-id",
741 -1);
742 if (qpti->scsi_id == -1)
743 qpti->scsi_id =
744 prom_getintdefault(qpti->sdev->bus->prom_node,
745 "scsi-initiator-id", 7);
746 qpti->qhost->this_id = qpti->scsi_id;
747 qpti->qhost->max_sectors = 64;
748
749 printk("SCSI ID %d ", qpti->scsi_id);
750 }
751
752 static void qpti_get_bursts(struct qlogicpti *qpti)
753 {
754 struct sbus_dev *sdev = qpti->sdev;
755 u8 bursts, bmask;
756
757 bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
758 bmask = prom_getintdefault(sdev->bus->prom_node,
759 "burst-sizes", 0xff);
760 if (bmask != 0xff)
761 bursts &= bmask;
762 if (bursts == 0xff ||
763 (bursts & DMA_BURST16) == 0 ||
764 (bursts & DMA_BURST32) == 0)
765 bursts = (DMA_BURST32 - 1);
766
767 qpti->bursts = bursts;
768 }
769
770 static void qpti_get_clock(struct qlogicpti *qpti)
771 {
772 unsigned int cfreq;
773
774 /* Check for what the clock input to this card is.
775 * Default to 40Mhz.
776 */
777 cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
778 qpti->clock = (cfreq + 500000)/1000000;
779 if (qpti->clock == 0) /* bullshit */
780 qpti->clock = 40;
781 }
782
783 /* The request and response queues must each be aligned
784 * on a page boundary.
785 */
786 static int __init qpti_map_queues(struct qlogicpti *qpti)
787 {
788 struct sbus_dev *sdev = qpti->sdev;
789
790 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
791 qpti->res_cpu = sbus_alloc_consistent(sdev,
792 QSIZE(RES_QUEUE_LEN),
793 &qpti->res_dvma);
794 if (qpti->res_cpu == NULL ||
795 qpti->res_dvma == 0) {
796 printk("QPTI: Cannot map response queue.\n");
797 return -1;
798 }
799
800 qpti->req_cpu = sbus_alloc_consistent(sdev,
801 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
802 &qpti->req_dvma);
803 if (qpti->req_cpu == NULL ||
804 qpti->req_dvma == 0) {
805 sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
806 qpti->res_cpu, qpti->res_dvma);
807 printk("QPTI: Cannot map request queue.\n");
808 return -1;
809 }
810 memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
811 memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
812 return 0;
813 }
814
815 const char *qlogicpti_info(struct Scsi_Host *host)
816 {
817 static char buf[80];
818 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
819
820 sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
821 qpti->qhost->irq, qpti->qregs);
822 return buf;
823 }
824
825 /* I am a certified frobtronicist. */
826 static inline void marker_frob(struct Command_Entry *cmd)
827 {
828 struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
829
830 memset(marker, 0, sizeof(struct Marker_Entry));
831 marker->hdr.entry_cnt = 1;
832 marker->hdr.entry_type = ENTRY_MARKER;
833 marker->modifier = SYNC_ALL;
834 marker->rsvd = 0;
835 }
836
837 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
838 struct qlogicpti *qpti)
839 {
840 memset(cmd, 0, sizeof(struct Command_Entry));
841 cmd->hdr.entry_cnt = 1;
842 cmd->hdr.entry_type = ENTRY_COMMAND;
843 cmd->target_id = Cmnd->device->id;
844 cmd->target_lun = Cmnd->device->lun;
845 cmd->cdb_length = Cmnd->cmd_len;
846 cmd->control_flags = 0;
847 if (Cmnd->device->tagged_supported) {
848 if (qpti->cmd_count[Cmnd->device->id] == 0)
849 qpti->tag_ages[Cmnd->device->id] = jiffies;
850 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
851 cmd->control_flags = CFLAG_ORDERED_TAG;
852 qpti->tag_ages[Cmnd->device->id] = jiffies;
853 } else
854 cmd->control_flags = CFLAG_SIMPLE_TAG;
855 }
856 if ((Cmnd->cmnd[0] == WRITE_6) ||
857 (Cmnd->cmnd[0] == WRITE_10) ||
858 (Cmnd->cmnd[0] == WRITE_12))
859 cmd->control_flags |= CFLAG_WRITE;
860 else
861 cmd->control_flags |= CFLAG_READ;
862 cmd->time_out = 30;
863 memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
864 }
865
866 /* Do it to it baby. */
867 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
868 struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
869 {
870 struct dataseg *ds;
871 struct scatterlist *sg, *s;
872 int i, n;
873
874 if (Cmnd->use_sg) {
875 int sg_count;
876
877 sg = (struct scatterlist *) Cmnd->request_buffer;
878 sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction);
879
880 ds = cmd->dataseg;
881 cmd->segment_cnt = sg_count;
882
883 /* Fill in first four sg entries: */
884 n = sg_count;
885 if (n > 4)
886 n = 4;
887 for_each_sg(sg, s, n, i) {
888 ds[i].d_base = sg_dma_address(s);
889 ds[i].d_count = sg_dma_len(s);
890 }
891 sg_count -= 4;
892 sg = s;
893 while (sg_count > 0) {
894 struct Continuation_Entry *cont;
895
896 ++cmd->hdr.entry_cnt;
897 cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
898 in_ptr = NEXT_REQ_PTR(in_ptr);
899 if (in_ptr == out_ptr)
900 return -1;
901
902 cont->hdr.entry_type = ENTRY_CONTINUATION;
903 cont->hdr.entry_cnt = 0;
904 cont->hdr.sys_def_1 = 0;
905 cont->hdr.flags = 0;
906 cont->reserved = 0;
907 ds = cont->dataseg;
908 n = sg_count;
909 if (n > 7)
910 n = 7;
911 for_each_sg(sg, s, n, i) {
912 ds[i].d_base = sg_dma_address(s);
913 ds[i].d_count = sg_dma_len(s);
914 }
915 sg_count -= n;
916 }
917 } else if (Cmnd->request_bufflen) {
918 Cmnd->SCp.ptr = (char *)(unsigned long)
919 sbus_map_single(qpti->sdev,
920 Cmnd->request_buffer,
921 Cmnd->request_bufflen,
922 Cmnd->sc_data_direction);
923
924 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
925 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
926 cmd->segment_cnt = 1;
927 } else {
928 cmd->dataseg[0].d_base = 0;
929 cmd->dataseg[0].d_count = 0;
930 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
931 }
932
933 /* Committed, record Scsi_Cmd so we can find it later. */
934 cmd->handle = in_ptr;
935 qpti->cmd_slots[in_ptr] = Cmnd;
936
937 qpti->cmd_count[Cmnd->device->id]++;
938 sbus_writew(in_ptr, qpti->qregs + MBOX4);
939 qpti->req_in_ptr = in_ptr;
940
941 return in_ptr;
942 }
943
944 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
945 {
946 /* Temporary workaround until bug is found and fixed (one bug has been found
947 already, but fixing it makes things even worse) -jj */
948 int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
949 host->can_queue = host->host_busy + num_free;
950 host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
951 }
952
953 static int qlogicpti_slave_configure(struct scsi_device *sdev)
954 {
955 struct qlogicpti *qpti = shost_priv(sdev->host);
956 int tgt = sdev->id;
957 u_short param[6];
958
959 /* tags handled in midlayer */
960 /* enable sync mode? */
961 if (sdev->sdtr) {
962 qpti->dev_param[tgt].device_flags |= 0x10;
963 } else {
964 qpti->dev_param[tgt].synchronous_offset = 0;
965 qpti->dev_param[tgt].synchronous_period = 0;
966 }
967 /* are we wide capable? */
968 if (sdev->wdtr)
969 qpti->dev_param[tgt].device_flags |= 0x20;
970
971 param[0] = MBOX_SET_TARGET_PARAMS;
972 param[1] = (tgt << 8);
973 param[2] = (qpti->dev_param[tgt].device_flags << 8);
974 if (qpti->dev_param[tgt].device_flags & 0x10) {
975 param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
976 qpti->dev_param[tgt].synchronous_period;
977 } else {
978 param[3] = 0;
979 }
980 qlogicpti_mbox_command(qpti, param, 0);
981 return 0;
982 }
983
984 /*
985 * The middle SCSI layer ensures that queuecommand never gets invoked
986 * concurrently with itself or the interrupt handler (though the
987 * interrupt handler may call this routine as part of
988 * request-completion handling).
989 *
990 * "This code must fly." -davem
991 */
992 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
993 {
994 struct Scsi_Host *host = Cmnd->device->host;
995 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
996 struct Command_Entry *cmd;
997 u_int out_ptr;
998 int in_ptr;
999
1000 Cmnd->scsi_done = done;
1001
1002 in_ptr = qpti->req_in_ptr;
1003 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1004 out_ptr = sbus_readw(qpti->qregs + MBOX4);
1005 in_ptr = NEXT_REQ_PTR(in_ptr);
1006 if (in_ptr == out_ptr)
1007 goto toss_command;
1008
1009 if (qpti->send_marker) {
1010 marker_frob(cmd);
1011 qpti->send_marker = 0;
1012 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1013 sbus_writew(in_ptr, qpti->qregs + MBOX4);
1014 qpti->req_in_ptr = in_ptr;
1015 goto toss_command;
1016 }
1017 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1018 in_ptr = NEXT_REQ_PTR(in_ptr);
1019 }
1020 cmd_frob(cmd, Cmnd, qpti);
1021 if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1022 goto toss_command;
1023
1024 update_can_queue(host, in_ptr, out_ptr);
1025
1026 return 0;
1027
1028 toss_command:
1029 printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1030 qpti->qpti_id);
1031
1032 /* Unfortunately, unless you use the new EH code, which
1033 * we don't, the midlayer will ignore the return value,
1034 * which is insane. We pick up the pieces like this.
1035 */
1036 Cmnd->result = DID_BUS_BUSY;
1037 done(Cmnd);
1038 return 1;
1039 }
1040
1041 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1042 {
1043 int host_status = DID_ERROR;
1044
1045 switch (sts->completion_status) {
1046 case CS_COMPLETE:
1047 host_status = DID_OK;
1048 break;
1049 case CS_INCOMPLETE:
1050 if (!(sts->state_flags & SF_GOT_BUS))
1051 host_status = DID_NO_CONNECT;
1052 else if (!(sts->state_flags & SF_GOT_TARGET))
1053 host_status = DID_BAD_TARGET;
1054 else if (!(sts->state_flags & SF_SENT_CDB))
1055 host_status = DID_ERROR;
1056 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1057 host_status = DID_ERROR;
1058 else if (!(sts->state_flags & SF_GOT_STATUS))
1059 host_status = DID_ERROR;
1060 else if (!(sts->state_flags & SF_GOT_SENSE))
1061 host_status = DID_ERROR;
1062 break;
1063 case CS_DMA_ERROR:
1064 case CS_TRANSPORT_ERROR:
1065 host_status = DID_ERROR;
1066 break;
1067 case CS_RESET_OCCURRED:
1068 case CS_BUS_RESET:
1069 host_status = DID_RESET;
1070 break;
1071 case CS_ABORTED:
1072 host_status = DID_ABORT;
1073 break;
1074 case CS_TIMEOUT:
1075 host_status = DID_TIME_OUT;
1076 break;
1077 case CS_DATA_OVERRUN:
1078 case CS_COMMAND_OVERRUN:
1079 case CS_STATUS_OVERRUN:
1080 case CS_BAD_MESSAGE:
1081 case CS_NO_MESSAGE_OUT:
1082 case CS_EXT_ID_FAILED:
1083 case CS_IDE_MSG_FAILED:
1084 case CS_ABORT_MSG_FAILED:
1085 case CS_NOP_MSG_FAILED:
1086 case CS_PARITY_ERROR_MSG_FAILED:
1087 case CS_DEVICE_RESET_MSG_FAILED:
1088 case CS_ID_MSG_FAILED:
1089 case CS_UNEXP_BUS_FREE:
1090 host_status = DID_ERROR;
1091 break;
1092 case CS_DATA_UNDERRUN:
1093 host_status = DID_OK;
1094 break;
1095 default:
1096 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1097 id, sts->completion_status);
1098 host_status = DID_ERROR;
1099 break;
1100 }
1101
1102 return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1103 }
1104
1105 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1106 {
1107 struct scsi_cmnd *Cmnd, *done_queue = NULL;
1108 struct Status_Entry *sts;
1109 u_int in_ptr, out_ptr;
1110
1111 if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1112 return NULL;
1113
1114 in_ptr = sbus_readw(qpti->qregs + MBOX5);
1115 sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1116 if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1117 switch (sbus_readw(qpti->qregs + MBOX0)) {
1118 case ASYNC_SCSI_BUS_RESET:
1119 case EXECUTION_TIMEOUT_RESET:
1120 qpti->send_marker = 1;
1121 break;
1122 case INVALID_COMMAND:
1123 case HOST_INTERFACE_ERROR:
1124 case COMMAND_ERROR:
1125 case COMMAND_PARAM_ERROR:
1126 break;
1127 };
1128 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1129 }
1130
1131 /* This looks like a network driver! */
1132 out_ptr = qpti->res_out_ptr;
1133 while (out_ptr != in_ptr) {
1134 u_int cmd_slot;
1135
1136 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1137 out_ptr = NEXT_RES_PTR(out_ptr);
1138
1139 /* We store an index in the handle, not the pointer in
1140 * some form. This avoids problems due to the fact
1141 * that the handle provided is only 32-bits. -DaveM
1142 */
1143 cmd_slot = sts->handle;
1144 Cmnd = qpti->cmd_slots[cmd_slot];
1145 qpti->cmd_slots[cmd_slot] = NULL;
1146
1147 if (sts->completion_status == CS_RESET_OCCURRED ||
1148 sts->completion_status == CS_ABORTED ||
1149 (sts->status_flags & STF_BUS_RESET))
1150 qpti->send_marker = 1;
1151
1152 if (sts->state_flags & SF_GOT_SENSE)
1153 memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1154 sizeof(Cmnd->sense_buffer));
1155
1156 if (sts->hdr.entry_type == ENTRY_STATUS)
1157 Cmnd->result =
1158 qlogicpti_return_status(sts, qpti->qpti_id);
1159 else
1160 Cmnd->result = DID_ERROR << 16;
1161
1162 if (Cmnd->use_sg) {
1163 sbus_unmap_sg(qpti->sdev,
1164 (struct scatterlist *)Cmnd->request_buffer,
1165 Cmnd->use_sg,
1166 Cmnd->sc_data_direction);
1167 } else if (Cmnd->request_bufflen) {
1168 sbus_unmap_single(qpti->sdev,
1169 (__u32)((unsigned long)Cmnd->SCp.ptr),
1170 Cmnd->request_bufflen,
1171 Cmnd->sc_data_direction);
1172 }
1173 qpti->cmd_count[Cmnd->device->id]--;
1174 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1175 Cmnd->host_scribble = (unsigned char *) done_queue;
1176 done_queue = Cmnd;
1177 }
1178 qpti->res_out_ptr = out_ptr;
1179
1180 return done_queue;
1181 }
1182
1183 static irqreturn_t qpti_intr(int irq, void *dev_id)
1184 {
1185 struct qlogicpti *qpti = dev_id;
1186 unsigned long flags;
1187 struct scsi_cmnd *dq;
1188
1189 spin_lock_irqsave(qpti->qhost->host_lock, flags);
1190 dq = qlogicpti_intr_handler(qpti);
1191
1192 if (dq != NULL) {
1193 do {
1194 struct scsi_cmnd *next;
1195
1196 next = (struct scsi_cmnd *) dq->host_scribble;
1197 dq->scsi_done(dq);
1198 dq = next;
1199 } while (dq != NULL);
1200 }
1201 spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1202
1203 return IRQ_HANDLED;
1204 }
1205
1206 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1207 {
1208 u_short param[6];
1209 struct Scsi_Host *host = Cmnd->device->host;
1210 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1211 int return_status = SUCCESS;
1212 u32 cmd_cookie;
1213 int i;
1214
1215 printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1216 qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1217
1218 qlogicpti_disable_irqs(qpti);
1219
1220 /* Find the 32-bit cookie we gave to the firmware for
1221 * this command.
1222 */
1223 for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1224 if (qpti->cmd_slots[i] == Cmnd)
1225 break;
1226 cmd_cookie = i;
1227
1228 param[0] = MBOX_ABORT;
1229 param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1230 param[2] = cmd_cookie >> 16;
1231 param[3] = cmd_cookie & 0xffff;
1232 if (qlogicpti_mbox_command(qpti, param, 0) ||
1233 (param[0] != MBOX_COMMAND_COMPLETE)) {
1234 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1235 qpti->qpti_id, param[0]);
1236 return_status = FAILED;
1237 }
1238
1239 qlogicpti_enable_irqs(qpti);
1240
1241 return return_status;
1242 }
1243
1244 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1245 {
1246 u_short param[6];
1247 struct Scsi_Host *host = Cmnd->device->host;
1248 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1249 int return_status = SUCCESS;
1250
1251 printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1252 qpti->qpti_id);
1253
1254 qlogicpti_disable_irqs(qpti);
1255
1256 param[0] = MBOX_BUS_RESET;
1257 param[1] = qpti->host_param.bus_reset_delay;
1258 if (qlogicpti_mbox_command(qpti, param, 0) ||
1259 (param[0] != MBOX_COMMAND_COMPLETE)) {
1260 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1261 qpti->qpti_id, param[0]);
1262 return_status = FAILED;
1263 }
1264
1265 qlogicpti_enable_irqs(qpti);
1266
1267 return return_status;
1268 }
1269
1270 static struct scsi_host_template qpti_template = {
1271 .module = THIS_MODULE,
1272 .name = "qlogicpti",
1273 .info = qlogicpti_info,
1274 .queuecommand = qlogicpti_queuecommand,
1275 .slave_configure = qlogicpti_slave_configure,
1276 .eh_abort_handler = qlogicpti_abort,
1277 .eh_bus_reset_handler = qlogicpti_reset,
1278 .can_queue = QLOGICPTI_REQ_QUEUE_LEN,
1279 .this_id = 7,
1280 .sg_tablesize = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1281 .cmd_per_lun = 1,
1282 .use_clustering = ENABLE_CLUSTERING,
1283 };
1284
1285 static int __devinit qpti_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1286 {
1287 static int nqptis;
1288 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1289 struct device_node *dp = dev->node;
1290 struct scsi_host_template *tpnt = match->data;
1291 struct Scsi_Host *host;
1292 struct qlogicpti *qpti;
1293 const char *fcode;
1294
1295 /* Sometimes Antares cards come up not completely
1296 * setup, and we get a report of a zero IRQ.
1297 */
1298 if (sdev->irqs[0] == 0)
1299 return -ENODEV;
1300
1301 host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1302 if (!host)
1303 return -ENOMEM;
1304
1305 qpti = (struct qlogicpti *) host->hostdata;
1306
1307 host->max_id = MAX_TARGETS;
1308 qpti->qhost = host;
1309 qpti->sdev = sdev;
1310 qpti->qpti_id = nqptis;
1311 qpti->prom_node = sdev->prom_node;
1312 strcpy(qpti->prom_name, sdev->ofdev.node->name);
1313 qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1314
1315 if (qpti_map_regs(qpti) < 0)
1316 goto fail_unlink;
1317
1318 if (qpti_register_irq(qpti) < 0)
1319 goto fail_unmap_regs;
1320
1321 qpti_get_scsi_id(qpti);
1322 qpti_get_bursts(qpti);
1323 qpti_get_clock(qpti);
1324
1325 /* Clear out scsi_cmnd array. */
1326 memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1327
1328 if (qpti_map_queues(qpti) < 0)
1329 goto fail_free_irq;
1330
1331 /* Load the firmware. */
1332 if (qlogicpti_load_firmware(qpti))
1333 goto fail_unmap_queues;
1334 if (qpti->is_pti) {
1335 /* Check the PTI status reg. */
1336 if (qlogicpti_verify_tmon(qpti))
1337 goto fail_unmap_queues;
1338 }
1339
1340 /* Reset the ISP and init res/req queues. */
1341 if (qlogicpti_reset_hardware(host))
1342 goto fail_unmap_queues;
1343
1344 printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1345 qpti->fware_minrev, qpti->fware_micrev);
1346
1347 fcode = of_get_property(dp, "isp-fcode", NULL);
1348 if (fcode && fcode[0])
1349 printk("(FCode %s)", fcode);
1350 if (of_find_property(dp, "differential", NULL) != NULL)
1351 qpti->differential = 1;
1352
1353 printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1354 qpti->qpti_id,
1355 (qpti->ultra ? "Ultra" : "Fast"),
1356 (qpti->differential ? "differential" : "single ended"));
1357
1358 if (scsi_add_host(host, &dev->dev)) {
1359 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1360 goto fail_unmap_queues;
1361 }
1362
1363 dev_set_drvdata(&sdev->ofdev.dev, qpti);
1364
1365 qpti_chain_add(qpti);
1366
1367 scsi_scan_host(host);
1368 nqptis++;
1369
1370 return 0;
1371
1372 fail_unmap_queues:
1373 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
1374 sbus_free_consistent(qpti->sdev,
1375 QSIZE(RES_QUEUE_LEN),
1376 qpti->res_cpu, qpti->res_dvma);
1377 sbus_free_consistent(qpti->sdev,
1378 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1379 qpti->req_cpu, qpti->req_dvma);
1380 #undef QSIZE
1381
1382 fail_unmap_regs:
1383 sbus_iounmap(qpti->qregs,
1384 qpti->sdev->reg_addrs[0].reg_size);
1385 if (qpti->is_pti)
1386 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1387
1388 fail_free_irq:
1389 free_irq(qpti->irq, qpti);
1390
1391 fail_unlink:
1392 scsi_host_put(host);
1393
1394 return -ENODEV;
1395 }
1396
1397 static int __devexit qpti_sbus_remove(struct of_device *dev)
1398 {
1399 struct qlogicpti *qpti = dev_get_drvdata(&dev->dev);
1400
1401 qpti_chain_del(qpti);
1402
1403 scsi_remove_host(qpti->qhost);
1404
1405 /* Shut up the card. */
1406 sbus_writew(0, qpti->qregs + SBUS_CTRL);
1407
1408 /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1409 free_irq(qpti->irq, qpti);
1410
1411 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
1412 sbus_free_consistent(qpti->sdev,
1413 QSIZE(RES_QUEUE_LEN),
1414 qpti->res_cpu, qpti->res_dvma);
1415 sbus_free_consistent(qpti->sdev,
1416 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1417 qpti->req_cpu, qpti->req_dvma);
1418 #undef QSIZE
1419
1420 sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
1421 if (qpti->is_pti)
1422 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1423
1424 scsi_host_put(qpti->qhost);
1425
1426 return 0;
1427 }
1428
1429 static struct of_device_id qpti_match[] = {
1430 {
1431 .name = "ptisp",
1432 .data = &qpti_template,
1433 },
1434 {
1435 .name = "PTI,ptisp",
1436 .data = &qpti_template,
1437 },
1438 {
1439 .name = "QLGC,isp",
1440 .data = &qpti_template,
1441 },
1442 {
1443 .name = "SUNW,isp",
1444 .data = &qpti_template,
1445 },
1446 {},
1447 };
1448 MODULE_DEVICE_TABLE(of, qpti_match);
1449
1450 static struct of_platform_driver qpti_sbus_driver = {
1451 .name = "qpti",
1452 .match_table = qpti_match,
1453 .probe = qpti_sbus_probe,
1454 .remove = __devexit_p(qpti_sbus_remove),
1455 };
1456
1457 static int __init qpti_init(void)
1458 {
1459 return of_register_driver(&qpti_sbus_driver, &sbus_bus_type);
1460 }
1461
1462 static void __exit qpti_exit(void)
1463 {
1464 of_unregister_driver(&qpti_sbus_driver);
1465 }
1466
1467 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1468 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1469 MODULE_LICENSE("GPL");
1470 MODULE_VERSION("2.0");
1471
1472 module_init(qpti_init);
1473 module_exit(qpti_exit);
Support for the Chinese Samsung S3C2440 based development boards