?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
sched: s/sched_latency/sched_min_granularity
[usb.git] / drivers / scsi / qlogicpti.c
blob594887205b0fe7876a3fea97493a89f9402d9fb9
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 /* this is very important to set! */
314 qpti->sbits = 1 << qpti->scsi_id;
315 }
316
317 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
318 {
319 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
320 u_short param[6];
321 unsigned short risc_code_addr;
322 int loop_count, i;
323 unsigned long flags;
324
325 risc_code_addr = 0x1000; /* all load addresses are at 0x1000 */
326
327 spin_lock_irqsave(host->host_lock, flags);
328
329 sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
330
331 /* Only reset the scsi bus if it is not free. */
332 if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
333 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
334 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
335 udelay(400);
336 }
337
338 sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
339 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
340 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
341
342 loop_count = DEFAULT_LOOP_COUNT;
343 while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
344 udelay(20);
345 if (!loop_count)
346 printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
347 qpti->qpti_id);
348
349 sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
350 set_sbus_cfg1(qpti);
351 qlogicpti_enable_irqs(qpti);
352
353 if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
354 qpti->ultra = 1;
355 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
356 qpti->qregs + RISC_MTREG);
357 } else {
358 qpti->ultra = 0;
359 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
360 qpti->qregs + RISC_MTREG);
361 }
362
363 /* reset adapter and per-device default values. */
364 /* do it after finding out whether we're ultra mode capable */
365 qlogicpti_set_hostdev_defaults(qpti);
366
367 /* Release the RISC processor. */
368 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
369
370 /* Get RISC to start executing the firmware code. */
371 param[0] = MBOX_EXEC_FIRMWARE;
372 param[1] = risc_code_addr;
373 if (qlogicpti_mbox_command(qpti, param, 1)) {
374 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
375 qpti->qpti_id);
376 spin_unlock_irqrestore(host->host_lock, flags);
377 return 1;
378 }
379
380 /* Set initiator scsi ID. */
381 param[0] = MBOX_SET_INIT_SCSI_ID;
382 param[1] = qpti->host_param.initiator_scsi_id;
383 if (qlogicpti_mbox_command(qpti, param, 1) ||
384 (param[0] != MBOX_COMMAND_COMPLETE)) {
385 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
386 qpti->qpti_id);
387 spin_unlock_irqrestore(host->host_lock, flags);
388 return 1;
389 }
390
391 /* Initialize state of the queues, both hw and sw. */
392 qpti->req_in_ptr = qpti->res_out_ptr = 0;
393
394 param[0] = MBOX_INIT_RES_QUEUE;
395 param[1] = RES_QUEUE_LEN + 1;
396 param[2] = (u_short) (qpti->res_dvma >> 16);
397 param[3] = (u_short) (qpti->res_dvma & 0xffff);
398 param[4] = param[5] = 0;
399 if (qlogicpti_mbox_command(qpti, param, 1)) {
400 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
401 qpti->qpti_id);
402 spin_unlock_irqrestore(host->host_lock, flags);
403 return 1;
404 }
405
406 param[0] = MBOX_INIT_REQ_QUEUE;
407 param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
408 param[2] = (u_short) (qpti->req_dvma >> 16);
409 param[3] = (u_short) (qpti->req_dvma & 0xffff);
410 param[4] = param[5] = 0;
411 if (qlogicpti_mbox_command(qpti, param, 1)) {
412 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
413 qpti->qpti_id);
414 spin_unlock_irqrestore(host->host_lock, flags);
415 return 1;
416 }
417
418 param[0] = MBOX_SET_RETRY_COUNT;
419 param[1] = qpti->host_param.retry_count;
420 param[2] = qpti->host_param.retry_delay;
421 qlogicpti_mbox_command(qpti, param, 0);
422
423 param[0] = MBOX_SET_TAG_AGE_LIMIT;
424 param[1] = qpti->host_param.tag_aging;
425 qlogicpti_mbox_command(qpti, param, 0);
426
427 for (i = 0; i < MAX_TARGETS; i++) {
428 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
429 param[1] = (i << 8);
430 qlogicpti_mbox_command(qpti, param, 0);
431 }
432
433 param[0] = MBOX_GET_FIRMWARE_STATUS;
434 qlogicpti_mbox_command(qpti, param, 0);
435
436 param[0] = MBOX_SET_SELECT_TIMEOUT;
437 param[1] = qpti->host_param.selection_timeout;
438 qlogicpti_mbox_command(qpti, param, 0);
439
440 for (i = 0; i < MAX_TARGETS; i++) {
441 param[0] = MBOX_SET_TARGET_PARAMS;
442 param[1] = (i << 8);
443 param[2] = (qpti->dev_param[i].device_flags << 8);
444 /*
445 * Since we're now loading 1.31 f/w, force narrow/async.
446 */
447 param[2] |= 0xc0;
448 param[3] = 0; /* no offset, we do not have sync mode yet */
449 qlogicpti_mbox_command(qpti, param, 0);
450 }
451
452 /*
453 * Always (sigh) do an initial bus reset (kicks f/w).
454 */
455 param[0] = MBOX_BUS_RESET;
456 param[1] = qpti->host_param.bus_reset_delay;
457 qlogicpti_mbox_command(qpti, param, 0);
458 qpti->send_marker = 1;
459
460 spin_unlock_irqrestore(host->host_lock, flags);
461 return 0;
462 }
463
464 #define PTI_RESET_LIMIT 400
465
466 static int __devinit qlogicpti_load_firmware(struct qlogicpti *qpti)
467 {
468 struct Scsi_Host *host = qpti->qhost;
469 unsigned short csum = 0;
470 unsigned short param[6];
471 unsigned short *risc_code, risc_code_addr, risc_code_length;
472 unsigned long flags;
473 int i, timeout;
474
475 risc_code = &sbus_risc_code01[0];
476 risc_code_addr = 0x1000; /* all f/w modules load at 0x1000 */
477 risc_code_length = sbus_risc_code_length01;
478
479 spin_lock_irqsave(host->host_lock, flags);
480
481 /* Verify the checksum twice, one before loading it, and once
482 * afterwards via the mailbox commands.
483 */
484 for (i = 0; i < risc_code_length; i++)
485 csum += risc_code[i];
486 if (csum) {
487 spin_unlock_irqrestore(host->host_lock, flags);
488 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
489 qpti->qpti_id);
490 return 1;
491 }
492 sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
493 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
494 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
495 timeout = PTI_RESET_LIMIT;
496 while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
497 udelay(20);
498 if (!timeout) {
499 spin_unlock_irqrestore(host->host_lock, flags);
500 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
501 return 1;
502 }
503
504 sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
505 mdelay(1);
506
507 sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
508 set_sbus_cfg1(qpti);
509 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
510
511 if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
512 qpti->ultra = 1;
513 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
514 qpti->qregs + RISC_MTREG);
515 } else {
516 qpti->ultra = 0;
517 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
518 qpti->qregs + RISC_MTREG);
519 }
520
521 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
522
523 /* Pin lines are only stable while RISC is paused. */
524 sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
525 if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
526 qpti->differential = 1;
527 else
528 qpti->differential = 0;
529 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
530
531 /* This shouldn't be necessary- we've reset things so we should be
532 running from the ROM now.. */
533
534 param[0] = MBOX_STOP_FIRMWARE;
535 param[1] = param[2] = param[3] = param[4] = param[5] = 0;
536 if (qlogicpti_mbox_command(qpti, param, 1)) {
537 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
538 qpti->qpti_id);
539 spin_unlock_irqrestore(host->host_lock, flags);
540 return 1;
541 }
542
543 /* Load it up.. */
544 for (i = 0; i < risc_code_length; i++) {
545 param[0] = MBOX_WRITE_RAM_WORD;
546 param[1] = risc_code_addr + i;
547 param[2] = risc_code[i];
548 if (qlogicpti_mbox_command(qpti, param, 1) ||
549 param[0] != MBOX_COMMAND_COMPLETE) {
550 printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
551 qpti->qpti_id);
552 spin_unlock_irqrestore(host->host_lock, flags);
553 return 1;
554 }
555 }
556
557 /* Reset the ISP again. */
558 sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
559 mdelay(1);
560
561 qlogicpti_enable_irqs(qpti);
562 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
563 sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
564
565 /* Ask ISP to verify the checksum of the new code. */
566 param[0] = MBOX_VERIFY_CHECKSUM;
567 param[1] = risc_code_addr;
568 if (qlogicpti_mbox_command(qpti, param, 1) ||
569 (param[0] != MBOX_COMMAND_COMPLETE)) {
570 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
571 qpti->qpti_id);
572 spin_unlock_irqrestore(host->host_lock, flags);
573 return 1;
574 }
575
576 /* Start using newly downloaded firmware. */
577 param[0] = MBOX_EXEC_FIRMWARE;
578 param[1] = risc_code_addr;
579 qlogicpti_mbox_command(qpti, param, 1);
580
581 param[0] = MBOX_ABOUT_FIRMWARE;
582 if (qlogicpti_mbox_command(qpti, param, 1) ||
583 (param[0] != MBOX_COMMAND_COMPLETE)) {
584 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
585 qpti->qpti_id);
586 spin_unlock_irqrestore(host->host_lock, flags);
587 return 1;
588 }
589
590 /* Snag the major and minor revisions from the result. */
591 qpti->fware_majrev = param[1];
592 qpti->fware_minrev = param[2];
593 qpti->fware_micrev = param[3];
594
595 /* Set the clock rate */
596 param[0] = MBOX_SET_CLOCK_RATE;
597 param[1] = qpti->clock;
598 if (qlogicpti_mbox_command(qpti, param, 1) ||
599 (param[0] != MBOX_COMMAND_COMPLETE)) {
600 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
601 qpti->qpti_id);
602 spin_unlock_irqrestore(host->host_lock, flags);
603 return 1;
604 }
605
606 if (qpti->is_pti != 0) {
607 /* Load scsi initiator ID and interrupt level into sbus static ram. */
608 param[0] = MBOX_WRITE_RAM_WORD;
609 param[1] = 0xff80;
610 param[2] = (unsigned short) qpti->scsi_id;
611 qlogicpti_mbox_command(qpti, param, 1);
612
613 param[0] = MBOX_WRITE_RAM_WORD;
614 param[1] = 0xff00;
615 param[2] = (unsigned short) 3;
616 qlogicpti_mbox_command(qpti, param, 1);
617 }
618
619 spin_unlock_irqrestore(host->host_lock, flags);
620 return 0;
621 }
622
623 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
624 {
625 int curstat = sbus_readb(qpti->sreg);
626
627 curstat &= 0xf0;
628 if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
629 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
630 if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
631 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
632 if (curstat != qpti->swsreg) {
633 int error = 0;
634 if (curstat & SREG_FUSE) {
635 error++;
636 printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
637 }
638 if (curstat & SREG_TPOWER) {
639 error++;
640 printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
641 }
642 if (qpti->differential &&
643 (curstat & SREG_DSENSE) != SREG_DSENSE) {
644 error++;
645 printk("qlogicpti%d: You have a single ended device on a "
646 "differential bus! Please fix!\n", qpti->qpti_id);
647 }
648 qpti->swsreg = curstat;
649 return error;
650 }
651 return 0;
652 }
653
654 static irqreturn_t qpti_intr(int irq, void *dev_id);
655
656 static void __init qpti_chain_add(struct qlogicpti *qpti)
657 {
658 spin_lock_irq(&qptichain_lock);
659 if (qptichain != NULL) {
660 struct qlogicpti *qlink = qptichain;
661
662 while(qlink->next)
663 qlink = qlink->next;
664 qlink->next = qpti;
665 } else {
666 qptichain = qpti;
667 }
668 qpti->next = NULL;
669 spin_unlock_irq(&qptichain_lock);
670 }
671
672 static void __init qpti_chain_del(struct qlogicpti *qpti)
673 {
674 spin_lock_irq(&qptichain_lock);
675 if (qptichain == qpti) {
676 qptichain = qpti->next;
677 } else {
678 struct qlogicpti *qlink = qptichain;
679 while(qlink->next != qpti)
680 qlink = qlink->next;
681 qlink->next = qpti->next;
682 }
683 qpti->next = NULL;
684 spin_unlock_irq(&qptichain_lock);
685 }
686
687 static int __init qpti_map_regs(struct qlogicpti *qpti)
688 {
689 struct sbus_dev *sdev = qpti->sdev;
690
691 qpti->qregs = sbus_ioremap(&sdev->resource[0], 0,
692 sdev->reg_addrs[0].reg_size,
693 "PTI Qlogic/ISP");
694 if (!qpti->qregs) {
695 printk("PTI: Qlogic/ISP registers are unmappable\n");
696 return -1;
697 }
698 if (qpti->is_pti) {
699 qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096),
700 sizeof(unsigned char),
701 "PTI Qlogic/ISP statreg");
702 if (!qpti->sreg) {
703 printk("PTI: Qlogic/ISP status register is unmappable\n");
704 return -1;
705 }
706 }
707 return 0;
708 }
709
710 static int __init qpti_register_irq(struct qlogicpti *qpti)
711 {
712 struct sbus_dev *sdev = qpti->sdev;
713
714 qpti->qhost->irq = qpti->irq = sdev->irqs[0];
715
716 /* We used to try various overly-clever things to
717 * reduce the interrupt processing overhead on
718 * sun4c/sun4m when multiple PTI's shared the
719 * same IRQ. It was too complex and messy to
720 * sanely maintain.
721 */
722 if (request_irq(qpti->irq, qpti_intr,
723 IRQF_SHARED, "Qlogic/PTI", qpti))
724 goto fail;
725
726 printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
727
728 return 0;
729
730 fail:
731 printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
732 return -1;
733 }
734
735 static void __init qpti_get_scsi_id(struct qlogicpti *qpti)
736 {
737 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
738 "initiator-id",
739 -1);
740 if (qpti->scsi_id == -1)
741 qpti->scsi_id = prom_getintdefault(qpti->prom_node,
742 "scsi-initiator-id",
743 -1);
744 if (qpti->scsi_id == -1)
745 qpti->scsi_id =
746 prom_getintdefault(qpti->sdev->bus->prom_node,
747 "scsi-initiator-id", 7);
748 qpti->qhost->this_id = qpti->scsi_id;
749 qpti->qhost->max_sectors = 64;
750
751 printk("SCSI ID %d ", qpti->scsi_id);
752 }
753
754 static void qpti_get_bursts(struct qlogicpti *qpti)
755 {
756 struct sbus_dev *sdev = qpti->sdev;
757 u8 bursts, bmask;
758
759 bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff);
760 bmask = prom_getintdefault(sdev->bus->prom_node,
761 "burst-sizes", 0xff);
762 if (bmask != 0xff)
763 bursts &= bmask;
764 if (bursts == 0xff ||
765 (bursts & DMA_BURST16) == 0 ||
766 (bursts & DMA_BURST32) == 0)
767 bursts = (DMA_BURST32 - 1);
768
769 qpti->bursts = bursts;
770 }
771
772 static void qpti_get_clock(struct qlogicpti *qpti)
773 {
774 unsigned int cfreq;
775
776 /* Check for what the clock input to this card is.
777 * Default to 40Mhz.
778 */
779 cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
780 qpti->clock = (cfreq + 500000)/1000000;
781 if (qpti->clock == 0) /* bullshit */
782 qpti->clock = 40;
783 }
784
785 /* The request and response queues must each be aligned
786 * on a page boundary.
787 */
788 static int __init qpti_map_queues(struct qlogicpti *qpti)
789 {
790 struct sbus_dev *sdev = qpti->sdev;
791
792 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
793 qpti->res_cpu = sbus_alloc_consistent(sdev,
794 QSIZE(RES_QUEUE_LEN),
795 &qpti->res_dvma);
796 if (qpti->res_cpu == NULL ||
797 qpti->res_dvma == 0) {
798 printk("QPTI: Cannot map response queue.\n");
799 return -1;
800 }
801
802 qpti->req_cpu = sbus_alloc_consistent(sdev,
803 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
804 &qpti->req_dvma);
805 if (qpti->req_cpu == NULL ||
806 qpti->req_dvma == 0) {
807 sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN),
808 qpti->res_cpu, qpti->res_dvma);
809 printk("QPTI: Cannot map request queue.\n");
810 return -1;
811 }
812 memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
813 memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
814 return 0;
815 }
816
817 const char *qlogicpti_info(struct Scsi_Host *host)
818 {
819 static char buf[80];
820 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
821
822 sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
823 qpti->qhost->irq, qpti->qregs);
824 return buf;
825 }
826
827 /* I am a certified frobtronicist. */
828 static inline void marker_frob(struct Command_Entry *cmd)
829 {
830 struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
831
832 memset(marker, 0, sizeof(struct Marker_Entry));
833 marker->hdr.entry_cnt = 1;
834 marker->hdr.entry_type = ENTRY_MARKER;
835 marker->modifier = SYNC_ALL;
836 marker->rsvd = 0;
837 }
838
839 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
840 struct qlogicpti *qpti)
841 {
842 memset(cmd, 0, sizeof(struct Command_Entry));
843 cmd->hdr.entry_cnt = 1;
844 cmd->hdr.entry_type = ENTRY_COMMAND;
845 cmd->target_id = Cmnd->device->id;
846 cmd->target_lun = Cmnd->device->lun;
847 cmd->cdb_length = Cmnd->cmd_len;
848 cmd->control_flags = 0;
849 if (Cmnd->device->tagged_supported) {
850 if (qpti->cmd_count[Cmnd->device->id] == 0)
851 qpti->tag_ages[Cmnd->device->id] = jiffies;
852 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
853 cmd->control_flags = CFLAG_ORDERED_TAG;
854 qpti->tag_ages[Cmnd->device->id] = jiffies;
855 } else
856 cmd->control_flags = CFLAG_SIMPLE_TAG;
857 }
858 if ((Cmnd->cmnd[0] == WRITE_6) ||
859 (Cmnd->cmnd[0] == WRITE_10) ||
860 (Cmnd->cmnd[0] == WRITE_12))
861 cmd->control_flags |= CFLAG_WRITE;
862 else
863 cmd->control_flags |= CFLAG_READ;
864 cmd->time_out = 30;
865 memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
866 }
867
868 /* Do it to it baby. */
869 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
870 struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
871 {
872 struct dataseg *ds;
873 struct scatterlist *sg;
874 int i, n;
875
876 if (Cmnd->use_sg) {
877 int sg_count;
878
879 sg = (struct scatterlist *) Cmnd->request_buffer;
880 sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction);
881
882 ds = cmd->dataseg;
883 cmd->segment_cnt = sg_count;
884
885 /* Fill in first four sg entries: */
886 n = sg_count;
887 if (n > 4)
888 n = 4;
889 for (i = 0; i < n; i++, sg++) {
890 ds[i].d_base = sg_dma_address(sg);
891 ds[i].d_count = sg_dma_len(sg);
892 }
893 sg_count -= 4;
894 while (sg_count > 0) {
895 struct Continuation_Entry *cont;
896
897 ++cmd->hdr.entry_cnt;
898 cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
899 in_ptr = NEXT_REQ_PTR(in_ptr);
900 if (in_ptr == out_ptr)
901 return -1;
902
903 cont->hdr.entry_type = ENTRY_CONTINUATION;
904 cont->hdr.entry_cnt = 0;
905 cont->hdr.sys_def_1 = 0;
906 cont->hdr.flags = 0;
907 cont->reserved = 0;
908 ds = cont->dataseg;
909 n = sg_count;
910 if (n > 7)
911 n = 7;
912 for (i = 0; i < n; i++, sg++) {
913 ds[i].d_base = sg_dma_address(sg);
914 ds[i].d_count = sg_dma_len(sg);
915 }
916 sg_count -= n;
917 }
918 } else if (Cmnd->request_bufflen) {
919 Cmnd->SCp.ptr = (char *)(unsigned long)
920 sbus_map_single(qpti->sdev,
921 Cmnd->request_buffer,
922 Cmnd->request_bufflen,
923 Cmnd->sc_data_direction);
924
925 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
926 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
927 cmd->segment_cnt = 1;
928 } else {
929 cmd->dataseg[0].d_base = 0;
930 cmd->dataseg[0].d_count = 0;
931 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
932 }
933
934 /* Committed, record Scsi_Cmd so we can find it later. */
935 cmd->handle = in_ptr;
936 qpti->cmd_slots[in_ptr] = Cmnd;
937
938 qpti->cmd_count[Cmnd->device->id]++;
939 sbus_writew(in_ptr, qpti->qregs + MBOX4);
940 qpti->req_in_ptr = in_ptr;
941
942 return in_ptr;
943 }
944
945 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
946 {
947 /* Temporary workaround until bug is found and fixed (one bug has been found
948 already, but fixing it makes things even worse) -jj */
949 int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
950 host->can_queue = host->host_busy + num_free;
951 host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
952 }
953
954 static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
955 {
956 unsigned char *buf;
957 unsigned int buflen;
958
959 if (cmd->use_sg) {
960 struct scatterlist *sg;
961
962 sg = (struct scatterlist *) cmd->request_buffer;
963 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
964 buflen = sg->length;
965 } else {
966 buf = cmd->request_buffer;
967 buflen = cmd->request_bufflen;
968 }
969
970 *buf_out = buf;
971 return buflen;
972 }
973
974 static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
975 {
976 if (cmd->use_sg) {
977 struct scatterlist *sg;
978
979 sg = (struct scatterlist *) cmd->request_buffer;
980 kunmap_atomic(buf - sg->offset, KM_IRQ0);
981 }
982 }
983
984 /*
985 * Until we scan the entire bus with inquiries, go throught this fella...
986 */
987 static void ourdone(struct scsi_cmnd *Cmnd)
988 {
989 struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
990 int tgt = Cmnd->device->id;
991 void (*done) (struct scsi_cmnd *);
992
993 /* This grot added by DaveM, blame him for ugliness.
994 * The issue is that in the 2.3.x driver we use the
995 * host_scribble portion of the scsi command as a
996 * completion linked list at interrupt service time,
997 * so we have to store the done function pointer elsewhere.
998 */
999 done = (void (*)(struct scsi_cmnd *))
1000 (((unsigned long) Cmnd->SCp.Message)
1001 #ifdef __sparc_v9__
1002 | ((unsigned long) Cmnd->SCp.Status << 32UL)
1003 #endif
1004 );
1005
1006 if ((qpti->sbits & (1 << tgt)) == 0) {
1007 int ok = host_byte(Cmnd->result) == DID_OK;
1008 if (Cmnd->cmnd[0] == 0x12 && ok) {
1009 unsigned char *iqd;
1010 unsigned int iqd_len;
1011
1012 iqd_len = scsi_rbuf_get(Cmnd, &iqd);
1013
1014 /* tags handled in midlayer */
1015 /* enable sync mode? */
1016 if (iqd[7] & 0x10) {
1017 qpti->dev_param[tgt].device_flags |= 0x10;
1018 } else {
1019 qpti->dev_param[tgt].synchronous_offset = 0;
1020 qpti->dev_param[tgt].synchronous_period = 0;
1021 }
1022 /* are we wide capable? */
1023 if (iqd[7] & 0x20) {
1024 qpti->dev_param[tgt].device_flags |= 0x20;
1025 }
1026
1027 scsi_rbuf_put(Cmnd, iqd);
1028
1029 qpti->sbits |= (1 << tgt);
1030 } else if (!ok) {
1031 qpti->sbits |= (1 << tgt);
1032 }
1033 }
1034 done(Cmnd);
1035 }
1036
1037 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *));
1038
1039 static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
1040 void (*done)(struct scsi_cmnd *))
1041 {
1042 struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
1043
1044 /*
1045 * done checking this host adapter?
1046 * If not, then rewrite the command
1047 * to finish through ourdone so we
1048 * can peek at Inquiry data results.
1049 */
1050 if (qpti->sbits && qpti->sbits != 0xffff) {
1051 /* See above about in ourdone this ugliness... */
1052 Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
1053 #ifdef CONFIG_SPARC64
1054 Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
1055 #endif
1056 return qlogicpti_queuecommand(Cmnd, ourdone);
1057 }
1058
1059 /*
1060 * We've peeked at all targets for this bus- time
1061 * to set parameters for devices for real now.
1062 */
1063 if (qpti->sbits == 0xffff) {
1064 int i;
1065 for(i = 0; i < MAX_TARGETS; i++) {
1066 u_short param[6];
1067 param[0] = MBOX_SET_TARGET_PARAMS;
1068 param[1] = (i << 8);
1069 param[2] = (qpti->dev_param[i].device_flags << 8);
1070 if (qpti->dev_param[i].device_flags & 0x10) {
1071 param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
1072 qpti->dev_param[i].synchronous_period;
1073 } else {
1074 param[3] = 0;
1075 }
1076 (void) qlogicpti_mbox_command(qpti, param, 0);
1077 }
1078 /*
1079 * set to zero so any traverse through ourdone
1080 * doesn't start the whole process again,
1081 */
1082 qpti->sbits = 0;
1083 }
1084
1085 /* check to see if we're done with all adapters... */
1086 for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
1087 if (qpti->sbits) {
1088 break;
1089 }
1090 }
1091
1092 /*
1093 * if we hit the end of the chain w/o finding adapters still
1094 * capability-configuring, then we're done with all adapters
1095 * and can rock on..
1096 */
1097 if (qpti == NULL)
1098 Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand;
1099
1100 return qlogicpti_queuecommand(Cmnd, done);
1101 }
1102
1103 /*
1104 * The middle SCSI layer ensures that queuecommand never gets invoked
1105 * concurrently with itself or the interrupt handler (though the
1106 * interrupt handler may call this routine as part of
1107 * request-completion handling).
1108 *
1109 * "This code must fly." -davem
1110 */
1111 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1112 {
1113 struct Scsi_Host *host = Cmnd->device->host;
1114 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1115 struct Command_Entry *cmd;
1116 u_int out_ptr;
1117 int in_ptr;
1118
1119 Cmnd->scsi_done = done;
1120
1121 in_ptr = qpti->req_in_ptr;
1122 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1123 out_ptr = sbus_readw(qpti->qregs + MBOX4);
1124 in_ptr = NEXT_REQ_PTR(in_ptr);
1125 if (in_ptr == out_ptr)
1126 goto toss_command;
1127
1128 if (qpti->send_marker) {
1129 marker_frob(cmd);
1130 qpti->send_marker = 0;
1131 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1132 sbus_writew(in_ptr, qpti->qregs + MBOX4);
1133 qpti->req_in_ptr = in_ptr;
1134 goto toss_command;
1135 }
1136 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1137 in_ptr = NEXT_REQ_PTR(in_ptr);
1138 }
1139 cmd_frob(cmd, Cmnd, qpti);
1140 if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1141 goto toss_command;
1142
1143 update_can_queue(host, in_ptr, out_ptr);
1144
1145 return 0;
1146
1147 toss_command:
1148 printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1149 qpti->qpti_id);
1150
1151 /* Unfortunately, unless you use the new EH code, which
1152 * we don't, the midlayer will ignore the return value,
1153 * which is insane. We pick up the pieces like this.
1154 */
1155 Cmnd->result = DID_BUS_BUSY;
1156 done(Cmnd);
1157 return 1;
1158 }
1159
1160 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1161 {
1162 int host_status = DID_ERROR;
1163
1164 switch (sts->completion_status) {
1165 case CS_COMPLETE:
1166 host_status = DID_OK;
1167 break;
1168 case CS_INCOMPLETE:
1169 if (!(sts->state_flags & SF_GOT_BUS))
1170 host_status = DID_NO_CONNECT;
1171 else if (!(sts->state_flags & SF_GOT_TARGET))
1172 host_status = DID_BAD_TARGET;
1173 else if (!(sts->state_flags & SF_SENT_CDB))
1174 host_status = DID_ERROR;
1175 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1176 host_status = DID_ERROR;
1177 else if (!(sts->state_flags & SF_GOT_STATUS))
1178 host_status = DID_ERROR;
1179 else if (!(sts->state_flags & SF_GOT_SENSE))
1180 host_status = DID_ERROR;
1181 break;
1182 case CS_DMA_ERROR:
1183 case CS_TRANSPORT_ERROR:
1184 host_status = DID_ERROR;
1185 break;
1186 case CS_RESET_OCCURRED:
1187 case CS_BUS_RESET:
1188 host_status = DID_RESET;
1189 break;
1190 case CS_ABORTED:
1191 host_status = DID_ABORT;
1192 break;
1193 case CS_TIMEOUT:
1194 host_status = DID_TIME_OUT;
1195 break;
1196 case CS_DATA_OVERRUN:
1197 case CS_COMMAND_OVERRUN:
1198 case CS_STATUS_OVERRUN:
1199 case CS_BAD_MESSAGE:
1200 case CS_NO_MESSAGE_OUT:
1201 case CS_EXT_ID_FAILED:
1202 case CS_IDE_MSG_FAILED:
1203 case CS_ABORT_MSG_FAILED:
1204 case CS_NOP_MSG_FAILED:
1205 case CS_PARITY_ERROR_MSG_FAILED:
1206 case CS_DEVICE_RESET_MSG_FAILED:
1207 case CS_ID_MSG_FAILED:
1208 case CS_UNEXP_BUS_FREE:
1209 host_status = DID_ERROR;
1210 break;
1211 case CS_DATA_UNDERRUN:
1212 host_status = DID_OK;
1213 break;
1214 default:
1215 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1216 id, sts->completion_status);
1217 host_status = DID_ERROR;
1218 break;
1219 }
1220
1221 return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1222 }
1223
1224 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1225 {
1226 struct scsi_cmnd *Cmnd, *done_queue = NULL;
1227 struct Status_Entry *sts;
1228 u_int in_ptr, out_ptr;
1229
1230 if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1231 return NULL;
1232
1233 in_ptr = sbus_readw(qpti->qregs + MBOX5);
1234 sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1235 if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1236 switch (sbus_readw(qpti->qregs + MBOX0)) {
1237 case ASYNC_SCSI_BUS_RESET:
1238 case EXECUTION_TIMEOUT_RESET:
1239 qpti->send_marker = 1;
1240 break;
1241 case INVALID_COMMAND:
1242 case HOST_INTERFACE_ERROR:
1243 case COMMAND_ERROR:
1244 case COMMAND_PARAM_ERROR:
1245 break;
1246 };
1247 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1248 }
1249
1250 /* This looks like a network driver! */
1251 out_ptr = qpti->res_out_ptr;
1252 while (out_ptr != in_ptr) {
1253 u_int cmd_slot;
1254
1255 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1256 out_ptr = NEXT_RES_PTR(out_ptr);
1257
1258 /* We store an index in the handle, not the pointer in
1259 * some form. This avoids problems due to the fact
1260 * that the handle provided is only 32-bits. -DaveM
1261 */
1262 cmd_slot = sts->handle;
1263 Cmnd = qpti->cmd_slots[cmd_slot];
1264 qpti->cmd_slots[cmd_slot] = NULL;
1265
1266 if (sts->completion_status == CS_RESET_OCCURRED ||
1267 sts->completion_status == CS_ABORTED ||
1268 (sts->status_flags & STF_BUS_RESET))
1269 qpti->send_marker = 1;
1270
1271 if (sts->state_flags & SF_GOT_SENSE)
1272 memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1273 sizeof(Cmnd->sense_buffer));
1274
1275 if (sts->hdr.entry_type == ENTRY_STATUS)
1276 Cmnd->result =
1277 qlogicpti_return_status(sts, qpti->qpti_id);
1278 else
1279 Cmnd->result = DID_ERROR << 16;
1280
1281 if (Cmnd->use_sg) {
1282 sbus_unmap_sg(qpti->sdev,
1283 (struct scatterlist *)Cmnd->request_buffer,
1284 Cmnd->use_sg,
1285 Cmnd->sc_data_direction);
1286 } else if (Cmnd->request_bufflen) {
1287 sbus_unmap_single(qpti->sdev,
1288 (__u32)((unsigned long)Cmnd->SCp.ptr),
1289 Cmnd->request_bufflen,
1290 Cmnd->sc_data_direction);
1291 }
1292 qpti->cmd_count[Cmnd->device->id]--;
1293 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1294 Cmnd->host_scribble = (unsigned char *) done_queue;
1295 done_queue = Cmnd;
1296 }
1297 qpti->res_out_ptr = out_ptr;
1298
1299 return done_queue;
1300 }
1301
1302 static irqreturn_t qpti_intr(int irq, void *dev_id)
1303 {
1304 struct qlogicpti *qpti = dev_id;
1305 unsigned long flags;
1306 struct scsi_cmnd *dq;
1307
1308 spin_lock_irqsave(qpti->qhost->host_lock, flags);
1309 dq = qlogicpti_intr_handler(qpti);
1310
1311 if (dq != NULL) {
1312 do {
1313 struct scsi_cmnd *next;
1314
1315 next = (struct scsi_cmnd *) dq->host_scribble;
1316 dq->scsi_done(dq);
1317 dq = next;
1318 } while (dq != NULL);
1319 }
1320 spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1321
1322 return IRQ_HANDLED;
1323 }
1324
1325 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1326 {
1327 u_short param[6];
1328 struct Scsi_Host *host = Cmnd->device->host;
1329 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1330 int return_status = SUCCESS;
1331 u32 cmd_cookie;
1332 int i;
1333
1334 printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1335 qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1336
1337 qlogicpti_disable_irqs(qpti);
1338
1339 /* Find the 32-bit cookie we gave to the firmware for
1340 * this command.
1341 */
1342 for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1343 if (qpti->cmd_slots[i] == Cmnd)
1344 break;
1345 cmd_cookie = i;
1346
1347 param[0] = MBOX_ABORT;
1348 param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1349 param[2] = cmd_cookie >> 16;
1350 param[3] = cmd_cookie & 0xffff;
1351 if (qlogicpti_mbox_command(qpti, param, 0) ||
1352 (param[0] != MBOX_COMMAND_COMPLETE)) {
1353 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1354 qpti->qpti_id, param[0]);
1355 return_status = FAILED;
1356 }
1357
1358 qlogicpti_enable_irqs(qpti);
1359
1360 return return_status;
1361 }
1362
1363 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1364 {
1365 u_short param[6];
1366 struct Scsi_Host *host = Cmnd->device->host;
1367 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1368 int return_status = SUCCESS;
1369
1370 printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1371 qpti->qpti_id);
1372
1373 qlogicpti_disable_irqs(qpti);
1374
1375 param[0] = MBOX_BUS_RESET;
1376 param[1] = qpti->host_param.bus_reset_delay;
1377 if (qlogicpti_mbox_command(qpti, param, 0) ||
1378 (param[0] != MBOX_COMMAND_COMPLETE)) {
1379 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1380 qpti->qpti_id, param[0]);
1381 return_status = FAILED;
1382 }
1383
1384 qlogicpti_enable_irqs(qpti);
1385
1386 return return_status;
1387 }
1388
1389 static struct scsi_host_template qpti_template = {
1390 .module = THIS_MODULE,
1391 .name = "qlogicpti",
1392 .info = qlogicpti_info,
1393 .queuecommand = qlogicpti_queuecommand_slow,
1394 .eh_abort_handler = qlogicpti_abort,
1395 .eh_bus_reset_handler = qlogicpti_reset,
1396 .can_queue = QLOGICPTI_REQ_QUEUE_LEN,
1397 .this_id = 7,
1398 .sg_tablesize = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1399 .cmd_per_lun = 1,
1400 .use_clustering = ENABLE_CLUSTERING,
1401 };
1402
1403 static int __devinit qpti_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1404 {
1405 static int nqptis;
1406 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1407 struct device_node *dp = dev->node;
1408 struct scsi_host_template *tpnt = match->data;
1409 struct Scsi_Host *host;
1410 struct qlogicpti *qpti;
1411 const char *fcode;
1412
1413 /* Sometimes Antares cards come up not completely
1414 * setup, and we get a report of a zero IRQ.
1415 */
1416 if (sdev->irqs[0] == 0)
1417 return -ENODEV;
1418
1419 host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1420 if (!host)
1421 return -ENOMEM;
1422
1423 qpti = (struct qlogicpti *) host->hostdata;
1424
1425 host->max_id = MAX_TARGETS;
1426 qpti->qhost = host;
1427 qpti->sdev = sdev;
1428 qpti->qpti_id = nqptis;
1429 qpti->prom_node = sdev->prom_node;
1430 strcpy(qpti->prom_name, sdev->ofdev.node->name);
1431 qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1432
1433 if (qpti_map_regs(qpti) < 0)
1434 goto fail_unlink;
1435
1436 if (qpti_register_irq(qpti) < 0)
1437 goto fail_unmap_regs;
1438
1439 qpti_get_scsi_id(qpti);
1440 qpti_get_bursts(qpti);
1441 qpti_get_clock(qpti);
1442
1443 /* Clear out scsi_cmnd array. */
1444 memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1445
1446 if (qpti_map_queues(qpti) < 0)
1447 goto fail_free_irq;
1448
1449 /* Load the firmware. */
1450 if (qlogicpti_load_firmware(qpti))
1451 goto fail_unmap_queues;
1452 if (qpti->is_pti) {
1453 /* Check the PTI status reg. */
1454 if (qlogicpti_verify_tmon(qpti))
1455 goto fail_unmap_queues;
1456 }
1457
1458 /* Reset the ISP and init res/req queues. */
1459 if (qlogicpti_reset_hardware(host))
1460 goto fail_unmap_queues;
1461
1462 printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1463 qpti->fware_minrev, qpti->fware_micrev);
1464
1465 fcode = of_get_property(dp, "isp-fcode", NULL);
1466 if (fcode && fcode[0])
1467 printk("(FCode %s)", fcode);
1468 if (of_find_property(dp, "differential", NULL) != NULL)
1469 qpti->differential = 1;
1470
1471 printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1472 qpti->qpti_id,
1473 (qpti->ultra ? "Ultra" : "Fast"),
1474 (qpti->differential ? "differential" : "single ended"));
1475
1476 if (scsi_add_host(host, &dev->dev)) {
1477 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1478 goto fail_unmap_queues;
1479 }
1480
1481 dev_set_drvdata(&sdev->ofdev.dev, qpti);
1482
1483 qpti_chain_add(qpti);
1484
1485 scsi_scan_host(host);
1486 nqptis++;
1487
1488 return 0;
1489
1490 fail_unmap_queues:
1491 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
1492 sbus_free_consistent(qpti->sdev,
1493 QSIZE(RES_QUEUE_LEN),
1494 qpti->res_cpu, qpti->res_dvma);
1495 sbus_free_consistent(qpti->sdev,
1496 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1497 qpti->req_cpu, qpti->req_dvma);
1498 #undef QSIZE
1499
1500 fail_unmap_regs:
1501 sbus_iounmap(qpti->qregs,
1502 qpti->sdev->reg_addrs[0].reg_size);
1503 if (qpti->is_pti)
1504 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1505
1506 fail_free_irq:
1507 free_irq(qpti->irq, qpti);
1508
1509 fail_unlink:
1510 scsi_host_put(host);
1511
1512 return -ENODEV;
1513 }
1514
1515 static int __devexit qpti_sbus_remove(struct of_device *dev)
1516 {
1517 struct qlogicpti *qpti = dev_get_drvdata(&dev->dev);
1518
1519 qpti_chain_del(qpti);
1520
1521 scsi_remove_host(qpti->qhost);
1522
1523 /* Shut up the card. */
1524 sbus_writew(0, qpti->qregs + SBUS_CTRL);
1525
1526 /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1527 free_irq(qpti->irq, qpti);
1528
1529 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
1530 sbus_free_consistent(qpti->sdev,
1531 QSIZE(RES_QUEUE_LEN),
1532 qpti->res_cpu, qpti->res_dvma);
1533 sbus_free_consistent(qpti->sdev,
1534 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1535 qpti->req_cpu, qpti->req_dvma);
1536 #undef QSIZE
1537
1538 sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
1539 if (qpti->is_pti)
1540 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1541
1542 scsi_host_put(qpti->qhost);
1543
1544 return 0;
1545 }
1546
1547 static struct of_device_id qpti_match[] = {
1548 {
1549 .name = "ptisp",
1550 .data = &qpti_template,
1551 },
1552 {
1553 .name = "PTI,ptisp",
1554 .data = &qpti_template,
1555 },
1556 {
1557 .name = "QLGC,isp",
1558 .data = &qpti_template,
1559 },
1560 {
1561 .name = "SUNW,isp",
1562 .data = &qpti_template,
1563 },
1564 {},
1565 };
1566 MODULE_DEVICE_TABLE(of, qpti_match);
1567
1568 static struct of_platform_driver qpti_sbus_driver = {
1569 .name = "qpti",
1570 .match_table = qpti_match,
1571 .probe = qpti_sbus_probe,
1572 .remove = __devexit_p(qpti_sbus_remove),
1573 };
1574
1575 static int __init qpti_init(void)
1576 {
1577 return of_register_driver(&qpti_sbus_driver, &sbus_bus_type);
1578 }
1579
1580 static void __exit qpti_exit(void)
1581 {
1582 of_unregister_driver(&qpti_sbus_driver);
1583 }
1584
1585 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1586 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1587 MODULE_LICENSE("GPL");
1588 MODULE_VERSION("2.0");
1589
1590 module_init(qpti_init);
1591 module_exit(qpti_exit);
USB Experimental Work