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[MIPS] vr41xx: Removed old v2.4 VRC4173 driver
[linux-2.6/linux-mips/linux-dm7025.git] / drivers / scsi / qlogicpti.c
blob69e0551a81d26abf80e5a4a53dda1ed9f8c6459e
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: mbox_command loop timeout #1\n");
197
198 /* Write mailbox command registers. */
199 switch (mbox_param[param[0]] >> 4) {
200 case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
201 case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
202 case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
203 case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
204 case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
205 case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
206 }
207
208 /* Clear RISC interrupt. */
209 tmp = sbus_readw(qpti->qregs + HCCTRL);
210 tmp |= HCCTRL_CRIRQ;
211 sbus_writew(tmp, qpti->qregs + HCCTRL);
212
213 /* Clear SBUS semaphore. */
214 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
215
216 /* Set HOST interrupt. */
217 tmp = sbus_readw(qpti->qregs + HCCTRL);
218 tmp |= HCCTRL_SHIRQ;
219 sbus_writew(tmp, qpti->qregs + HCCTRL);
220
221 /* Wait for HOST interrupt clears. */
222 loop_count = DEFAULT_LOOP_COUNT;
223 while (--loop_count &&
224 (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
225 udelay(20);
226 if (!loop_count)
227 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #2\n",
228 param[0]);
229
230 /* Wait for SBUS semaphore to get set. */
231 loop_count = DEFAULT_LOOP_COUNT;
232 while (--loop_count &&
233 !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
234 udelay(20);
235
236 /* Workaround for some buggy chips. */
237 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
238 break;
239 }
240 if (!loop_count)
241 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #3\n",
242 param[0]);
243
244 /* Wait for MBOX busy condition to go away. */
245 loop_count = DEFAULT_LOOP_COUNT;
246 while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
247 udelay(20);
248 if (!loop_count)
249 printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #4\n",
250 param[0]);
251
252 /* Read back output parameters. */
253 switch (mbox_param[param[0]] & 0xf) {
254 case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
255 case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
256 case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
257 case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
258 case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
259 case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
260 }
261
262 /* Clear RISC interrupt. */
263 tmp = sbus_readw(qpti->qregs + HCCTRL);
264 tmp |= HCCTRL_CRIRQ;
265 sbus_writew(tmp, qpti->qregs + HCCTRL);
266
267 /* Release SBUS semaphore. */
268 tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
269 tmp &= ~(SBUS_SEMAPHORE_LCK);
270 sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
271
272 /* We're done. */
273 return 0;
274 }
275
276 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
277 {
278 int i;
279
280 qpti->host_param.initiator_scsi_id = qpti->scsi_id;
281 qpti->host_param.bus_reset_delay = 3;
282 qpti->host_param.retry_count = 0;
283 qpti->host_param.retry_delay = 5;
284 qpti->host_param.async_data_setup_time = 3;
285 qpti->host_param.req_ack_active_negation = 1;
286 qpti->host_param.data_line_active_negation = 1;
287 qpti->host_param.data_dma_burst_enable = 1;
288 qpti->host_param.command_dma_burst_enable = 1;
289 qpti->host_param.tag_aging = 8;
290 qpti->host_param.selection_timeout = 250;
291 qpti->host_param.max_queue_depth = 256;
292
293 for(i = 0; i < MAX_TARGETS; i++) {
294 /*
295 * disconnect, parity, arq, reneg on reset, and, oddly enough
296 * tags...the midlayer's notion of tagged support has to match
297 * our device settings, and since we base whether we enable a
298 * tag on a per-cmnd basis upon what the midlayer sez, we
299 * actually enable the capability here.
300 */
301 qpti->dev_param[i].device_flags = 0xcd;
302 qpti->dev_param[i].execution_throttle = 16;
303 if (qpti->ultra) {
304 qpti->dev_param[i].synchronous_period = 12;
305 qpti->dev_param[i].synchronous_offset = 8;
306 } else {
307 qpti->dev_param[i].synchronous_period = 25;
308 qpti->dev_param[i].synchronous_offset = 12;
309 }
310 qpti->dev_param[i].device_enable = 1;
311 }
312 /* this is very important to set! */
313 qpti->sbits = 1 << qpti->scsi_id;
314 }
315
316 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
317 {
318 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
319 u_short param[6];
320 unsigned short risc_code_addr;
321 int loop_count, i;
322 unsigned long flags;
323
324 risc_code_addr = 0x1000; /* all load addresses are at 0x1000 */
325
326 spin_lock_irqsave(host->host_lock, flags);
327
328 sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
329
330 /* Only reset the scsi bus if it is not free. */
331 if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
332 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
333 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
334 udelay(400);
335 }
336
337 sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
338 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
339 sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
340
341 loop_count = DEFAULT_LOOP_COUNT;
342 while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
343 udelay(20);
344 if (!loop_count)
345 printk(KERN_EMERG "qlogicpti: reset_hardware loop timeout\n");
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 __init 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, struct pt_regs *regs);
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("qpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
725
726 return 0;
727
728 fail:
729 printk("qpti%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;
872 int i, n;
873
874 if (Cmnd->use_sg) {
875 int sg_count;
876
877 sg = (struct scatterlist *) Cmnd->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 (i = 0; i < n; i++, sg++) {
888 ds[i].d_base = sg_dma_address(sg);
889 ds[i].d_count = sg_dma_len(sg);
890 }
891 sg_count -= 4;
892 while (sg_count > 0) {
893 struct Continuation_Entry *cont;
894
895 ++cmd->hdr.entry_cnt;
896 cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
897 in_ptr = NEXT_REQ_PTR(in_ptr);
898 if (in_ptr == out_ptr)
899 return -1;
900
901 cont->hdr.entry_type = ENTRY_CONTINUATION;
902 cont->hdr.entry_cnt = 0;
903 cont->hdr.sys_def_1 = 0;
904 cont->hdr.flags = 0;
905 cont->reserved = 0;
906 ds = cont->dataseg;
907 n = sg_count;
908 if (n > 7)
909 n = 7;
910 for (i = 0; i < n; i++, sg++) {
911 ds[i].d_base = sg_dma_address(sg);
912 ds[i].d_count = sg_dma_len(sg);
913 }
914 sg_count -= n;
915 }
916 } else if (Cmnd->request_bufflen) {
917 Cmnd->SCp.ptr = (char *)(unsigned long)
918 sbus_map_single(qpti->sdev,
919 Cmnd->request_buffer,
920 Cmnd->request_bufflen,
921 Cmnd->sc_data_direction);
922
923 cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr);
924 cmd->dataseg[0].d_count = Cmnd->request_bufflen;
925 cmd->segment_cnt = 1;
926 } else {
927 cmd->dataseg[0].d_base = 0;
928 cmd->dataseg[0].d_count = 0;
929 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
930 }
931
932 /* Committed, record Scsi_Cmd so we can find it later. */
933 cmd->handle = in_ptr;
934 qpti->cmd_slots[in_ptr] = Cmnd;
935
936 qpti->cmd_count[Cmnd->device->id]++;
937 sbus_writew(in_ptr, qpti->qregs + MBOX4);
938 qpti->req_in_ptr = in_ptr;
939
940 return in_ptr;
941 }
942
943 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
944 {
945 /* Temporary workaround until bug is found and fixed (one bug has been found
946 already, but fixing it makes things even worse) -jj */
947 int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
948 host->can_queue = host->host_busy + num_free;
949 host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
950 }
951
952 static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
953 {
954 unsigned char *buf;
955 unsigned int buflen;
956
957 if (cmd->use_sg) {
958 struct scatterlist *sg;
959
960 sg = (struct scatterlist *) cmd->request_buffer;
961 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
962 buflen = sg->length;
963 } else {
964 buf = cmd->request_buffer;
965 buflen = cmd->request_bufflen;
966 }
967
968 *buf_out = buf;
969 return buflen;
970 }
971
972 static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
973 {
974 if (cmd->use_sg) {
975 struct scatterlist *sg;
976
977 sg = (struct scatterlist *) cmd->request_buffer;
978 kunmap_atomic(buf - sg->offset, KM_IRQ0);
979 }
980 }
981
982 /*
983 * Until we scan the entire bus with inquiries, go throught this fella...
984 */
985 static void ourdone(struct scsi_cmnd *Cmnd)
986 {
987 struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
988 int tgt = Cmnd->device->id;
989 void (*done) (struct scsi_cmnd *);
990
991 /* This grot added by DaveM, blame him for ugliness.
992 * The issue is that in the 2.3.x driver we use the
993 * host_scribble portion of the scsi command as a
994 * completion linked list at interrupt service time,
995 * so we have to store the done function pointer elsewhere.
996 */
997 done = (void (*)(struct scsi_cmnd *))
998 (((unsigned long) Cmnd->SCp.Message)
999 #ifdef __sparc_v9__
1000 | ((unsigned long) Cmnd->SCp.Status << 32UL)
1001 #endif
1002 );
1003
1004 if ((qpti->sbits & (1 << tgt)) == 0) {
1005 int ok = host_byte(Cmnd->result) == DID_OK;
1006 if (Cmnd->cmnd[0] == 0x12 && ok) {
1007 unsigned char *iqd;
1008 unsigned int iqd_len;
1009
1010 iqd_len = scsi_rbuf_get(Cmnd, &iqd);
1011
1012 /* tags handled in midlayer */
1013 /* enable sync mode? */
1014 if (iqd[7] & 0x10) {
1015 qpti->dev_param[tgt].device_flags |= 0x10;
1016 } else {
1017 qpti->dev_param[tgt].synchronous_offset = 0;
1018 qpti->dev_param[tgt].synchronous_period = 0;
1019 }
1020 /* are we wide capable? */
1021 if (iqd[7] & 0x20) {
1022 qpti->dev_param[tgt].device_flags |= 0x20;
1023 }
1024
1025 scsi_rbuf_put(Cmnd, iqd);
1026
1027 qpti->sbits |= (1 << tgt);
1028 } else if (!ok) {
1029 qpti->sbits |= (1 << tgt);
1030 }
1031 }
1032 done(Cmnd);
1033 }
1034
1035 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *));
1036
1037 static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd,
1038 void (*done)(struct scsi_cmnd *))
1039 {
1040 struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata;
1041
1042 /*
1043 * done checking this host adapter?
1044 * If not, then rewrite the command
1045 * to finish through ourdone so we
1046 * can peek at Inquiry data results.
1047 */
1048 if (qpti->sbits && qpti->sbits != 0xffff) {
1049 /* See above about in ourdone this ugliness... */
1050 Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff;
1051 #ifdef CONFIG_SPARC64
1052 Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff;
1053 #endif
1054 return qlogicpti_queuecommand(Cmnd, ourdone);
1055 }
1056
1057 /*
1058 * We've peeked at all targets for this bus- time
1059 * to set parameters for devices for real now.
1060 */
1061 if (qpti->sbits == 0xffff) {
1062 int i;
1063 for(i = 0; i < MAX_TARGETS; i++) {
1064 u_short param[6];
1065 param[0] = MBOX_SET_TARGET_PARAMS;
1066 param[1] = (i << 8);
1067 param[2] = (qpti->dev_param[i].device_flags << 8);
1068 if (qpti->dev_param[i].device_flags & 0x10) {
1069 param[3] = (qpti->dev_param[i].synchronous_offset << 8) |
1070 qpti->dev_param[i].synchronous_period;
1071 } else {
1072 param[3] = 0;
1073 }
1074 (void) qlogicpti_mbox_command(qpti, param, 0);
1075 }
1076 /*
1077 * set to zero so any traverse through ourdone
1078 * doesn't start the whole process again,
1079 */
1080 qpti->sbits = 0;
1081 }
1082
1083 /* check to see if we're done with all adapters... */
1084 for (qpti = qptichain; qpti != NULL; qpti = qpti->next) {
1085 if (qpti->sbits) {
1086 break;
1087 }
1088 }
1089
1090 /*
1091 * if we hit the end of the chain w/o finding adapters still
1092 * capability-configuring, then we're done with all adapters
1093 * and can rock on..
1094 */
1095 if (qpti == NULL)
1096 Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand;
1097
1098 return qlogicpti_queuecommand(Cmnd, done);
1099 }
1100
1101 /*
1102 * The middle SCSI layer ensures that queuecommand never gets invoked
1103 * concurrently with itself or the interrupt handler (though the
1104 * interrupt handler may call this routine as part of
1105 * request-completion handling).
1106 *
1107 * "This code must fly." -davem
1108 */
1109 static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1110 {
1111 struct Scsi_Host *host = Cmnd->device->host;
1112 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1113 struct Command_Entry *cmd;
1114 u_int out_ptr;
1115 int in_ptr;
1116
1117 Cmnd->scsi_done = done;
1118
1119 in_ptr = qpti->req_in_ptr;
1120 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1121 out_ptr = sbus_readw(qpti->qregs + MBOX4);
1122 in_ptr = NEXT_REQ_PTR(in_ptr);
1123 if (in_ptr == out_ptr)
1124 goto toss_command;
1125
1126 if (qpti->send_marker) {
1127 marker_frob(cmd);
1128 qpti->send_marker = 0;
1129 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1130 sbus_writew(in_ptr, qpti->qregs + MBOX4);
1131 qpti->req_in_ptr = in_ptr;
1132 goto toss_command;
1133 }
1134 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1135 in_ptr = NEXT_REQ_PTR(in_ptr);
1136 }
1137 cmd_frob(cmd, Cmnd, qpti);
1138 if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1139 goto toss_command;
1140
1141 update_can_queue(host, in_ptr, out_ptr);
1142
1143 return 0;
1144
1145 toss_command:
1146 printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1147 qpti->qpti_id);
1148
1149 /* Unfortunately, unless you use the new EH code, which
1150 * we don't, the midlayer will ignore the return value,
1151 * which is insane. We pick up the pieces like this.
1152 */
1153 Cmnd->result = DID_BUS_BUSY;
1154 done(Cmnd);
1155 return 1;
1156 }
1157
1158 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1159 {
1160 int host_status = DID_ERROR;
1161
1162 switch (sts->completion_status) {
1163 case CS_COMPLETE:
1164 host_status = DID_OK;
1165 break;
1166 case CS_INCOMPLETE:
1167 if (!(sts->state_flags & SF_GOT_BUS))
1168 host_status = DID_NO_CONNECT;
1169 else if (!(sts->state_flags & SF_GOT_TARGET))
1170 host_status = DID_BAD_TARGET;
1171 else if (!(sts->state_flags & SF_SENT_CDB))
1172 host_status = DID_ERROR;
1173 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1174 host_status = DID_ERROR;
1175 else if (!(sts->state_flags & SF_GOT_STATUS))
1176 host_status = DID_ERROR;
1177 else if (!(sts->state_flags & SF_GOT_SENSE))
1178 host_status = DID_ERROR;
1179 break;
1180 case CS_DMA_ERROR:
1181 case CS_TRANSPORT_ERROR:
1182 host_status = DID_ERROR;
1183 break;
1184 case CS_RESET_OCCURRED:
1185 case CS_BUS_RESET:
1186 host_status = DID_RESET;
1187 break;
1188 case CS_ABORTED:
1189 host_status = DID_ABORT;
1190 break;
1191 case CS_TIMEOUT:
1192 host_status = DID_TIME_OUT;
1193 break;
1194 case CS_DATA_OVERRUN:
1195 case CS_COMMAND_OVERRUN:
1196 case CS_STATUS_OVERRUN:
1197 case CS_BAD_MESSAGE:
1198 case CS_NO_MESSAGE_OUT:
1199 case CS_EXT_ID_FAILED:
1200 case CS_IDE_MSG_FAILED:
1201 case CS_ABORT_MSG_FAILED:
1202 case CS_NOP_MSG_FAILED:
1203 case CS_PARITY_ERROR_MSG_FAILED:
1204 case CS_DEVICE_RESET_MSG_FAILED:
1205 case CS_ID_MSG_FAILED:
1206 case CS_UNEXP_BUS_FREE:
1207 host_status = DID_ERROR;
1208 break;
1209 case CS_DATA_UNDERRUN:
1210 host_status = DID_OK;
1211 break;
1212 default:
1213 printk(KERN_EMERG "qpti%d: unknown completion status 0x%04x\n",
1214 id, sts->completion_status);
1215 host_status = DID_ERROR;
1216 break;
1217 }
1218
1219 return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1220 }
1221
1222 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1223 {
1224 struct scsi_cmnd *Cmnd, *done_queue = NULL;
1225 struct Status_Entry *sts;
1226 u_int in_ptr, out_ptr;
1227
1228 if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1229 return NULL;
1230
1231 in_ptr = sbus_readw(qpti->qregs + MBOX5);
1232 sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1233 if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1234 switch (sbus_readw(qpti->qregs + MBOX0)) {
1235 case ASYNC_SCSI_BUS_RESET:
1236 case EXECUTION_TIMEOUT_RESET:
1237 qpti->send_marker = 1;
1238 break;
1239 case INVALID_COMMAND:
1240 case HOST_INTERFACE_ERROR:
1241 case COMMAND_ERROR:
1242 case COMMAND_PARAM_ERROR:
1243 break;
1244 };
1245 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1246 }
1247
1248 /* This looks like a network driver! */
1249 out_ptr = qpti->res_out_ptr;
1250 while (out_ptr != in_ptr) {
1251 u_int cmd_slot;
1252
1253 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1254 out_ptr = NEXT_RES_PTR(out_ptr);
1255
1256 /* We store an index in the handle, not the pointer in
1257 * some form. This avoids problems due to the fact
1258 * that the handle provided is only 32-bits. -DaveM
1259 */
1260 cmd_slot = sts->handle;
1261 Cmnd = qpti->cmd_slots[cmd_slot];
1262 qpti->cmd_slots[cmd_slot] = NULL;
1263
1264 if (sts->completion_status == CS_RESET_OCCURRED ||
1265 sts->completion_status == CS_ABORTED ||
1266 (sts->status_flags & STF_BUS_RESET))
1267 qpti->send_marker = 1;
1268
1269 if (sts->state_flags & SF_GOT_SENSE)
1270 memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1271 sizeof(Cmnd->sense_buffer));
1272
1273 if (sts->hdr.entry_type == ENTRY_STATUS)
1274 Cmnd->result =
1275 qlogicpti_return_status(sts, qpti->qpti_id);
1276 else
1277 Cmnd->result = DID_ERROR << 16;
1278
1279 if (Cmnd->use_sg) {
1280 sbus_unmap_sg(qpti->sdev,
1281 (struct scatterlist *)Cmnd->buffer,
1282 Cmnd->use_sg,
1283 Cmnd->sc_data_direction);
1284 } else {
1285 sbus_unmap_single(qpti->sdev,
1286 (__u32)((unsigned long)Cmnd->SCp.ptr),
1287 Cmnd->request_bufflen,
1288 Cmnd->sc_data_direction);
1289 }
1290 qpti->cmd_count[Cmnd->device->id]--;
1291 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1292 Cmnd->host_scribble = (unsigned char *) done_queue;
1293 done_queue = Cmnd;
1294 }
1295 qpti->res_out_ptr = out_ptr;
1296
1297 return done_queue;
1298 }
1299
1300 static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs)
1301 {
1302 struct qlogicpti *qpti = dev_id;
1303 unsigned long flags;
1304 struct scsi_cmnd *dq;
1305
1306 spin_lock_irqsave(qpti->qhost->host_lock, flags);
1307 dq = qlogicpti_intr_handler(qpti);
1308
1309 if (dq != NULL) {
1310 do {
1311 struct scsi_cmnd *next;
1312
1313 next = (struct scsi_cmnd *) dq->host_scribble;
1314 dq->scsi_done(dq);
1315 dq = next;
1316 } while (dq != NULL);
1317 }
1318 spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1319
1320 return IRQ_HANDLED;
1321 }
1322
1323 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1324 {
1325 u_short param[6];
1326 struct Scsi_Host *host = Cmnd->device->host;
1327 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1328 int return_status = SUCCESS;
1329 u32 cmd_cookie;
1330 int i;
1331
1332 printk(KERN_WARNING "qlogicpti : Aborting cmd for tgt[%d] lun[%d]\n",
1333 (int)Cmnd->device->id, (int)Cmnd->device->lun);
1334
1335 qlogicpti_disable_irqs(qpti);
1336
1337 /* Find the 32-bit cookie we gave to the firmware for
1338 * this command.
1339 */
1340 for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1341 if (qpti->cmd_slots[i] == Cmnd)
1342 break;
1343 cmd_cookie = i;
1344
1345 param[0] = MBOX_ABORT;
1346 param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1347 param[2] = cmd_cookie >> 16;
1348 param[3] = cmd_cookie & 0xffff;
1349 if (qlogicpti_mbox_command(qpti, param, 0) ||
1350 (param[0] != MBOX_COMMAND_COMPLETE)) {
1351 printk(KERN_EMERG "qlogicpti : scsi abort failure: %x\n", param[0]);
1352 return_status = FAILED;
1353 }
1354
1355 qlogicpti_enable_irqs(qpti);
1356
1357 return return_status;
1358 }
1359
1360 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1361 {
1362 u_short param[6];
1363 struct Scsi_Host *host = Cmnd->device->host;
1364 struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1365 int return_status = SUCCESS;
1366
1367 printk(KERN_WARNING "qlogicpti : Resetting SCSI bus!\n");
1368
1369 qlogicpti_disable_irqs(qpti);
1370
1371 param[0] = MBOX_BUS_RESET;
1372 param[1] = qpti->host_param.bus_reset_delay;
1373 if (qlogicpti_mbox_command(qpti, param, 0) ||
1374 (param[0] != MBOX_COMMAND_COMPLETE)) {
1375 printk(KERN_EMERG "qlogicisp : scsi bus reset failure: %x\n", param[0]);
1376 return_status = FAILED;
1377 }
1378
1379 qlogicpti_enable_irqs(qpti);
1380
1381 return return_status;
1382 }
1383
1384 static struct scsi_host_template qpti_template = {
1385 .module = THIS_MODULE,
1386 .name = "qlogicpti",
1387 .info = qlogicpti_info,
1388 .queuecommand = qlogicpti_queuecommand_slow,
1389 .eh_abort_handler = qlogicpti_abort,
1390 .eh_bus_reset_handler = qlogicpti_reset,
1391 .can_queue = QLOGICPTI_REQ_QUEUE_LEN,
1392 .this_id = 7,
1393 .sg_tablesize = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1394 .cmd_per_lun = 1,
1395 .use_clustering = ENABLE_CLUSTERING,
1396 };
1397
1398 static int __devinit qpti_sbus_probe(struct of_device *dev, const struct of_device_id *match)
1399 {
1400 static int nqptis;
1401 struct sbus_dev *sdev = to_sbus_device(&dev->dev);
1402 struct device_node *dp = dev->node;
1403 struct scsi_host_template *tpnt = match->data;
1404 struct Scsi_Host *host;
1405 struct qlogicpti *qpti;
1406 char *fcode;
1407
1408 /* Sometimes Antares cards come up not completely
1409 * setup, and we get a report of a zero IRQ.
1410 */
1411 if (sdev->irqs[0] == 0)
1412 return -ENODEV;
1413
1414 host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1415 if (!host)
1416 return -ENOMEM;
1417
1418 qpti = (struct qlogicpti *) host->hostdata;
1419
1420 host->max_id = MAX_TARGETS;
1421 qpti->qhost = host;
1422 qpti->sdev = sdev;
1423 qpti->qpti_id = nqptis;
1424 qpti->prom_node = sdev->prom_node;
1425 strcpy(qpti->prom_name, sdev->ofdev.node->name);
1426 qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1427
1428 if (qpti_map_regs(qpti) < 0)
1429 goto fail_unlink;
1430
1431 if (qpti_register_irq(qpti) < 0)
1432 goto fail_unmap_regs;
1433
1434 qpti_get_scsi_id(qpti);
1435 qpti_get_bursts(qpti);
1436 qpti_get_clock(qpti);
1437
1438 /* Clear out scsi_cmnd array. */
1439 memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1440
1441 if (qpti_map_queues(qpti) < 0)
1442 goto fail_free_irq;
1443
1444 /* Load the firmware. */
1445 if (qlogicpti_load_firmware(qpti))
1446 goto fail_unmap_queues;
1447 if (qpti->is_pti) {
1448 /* Check the PTI status reg. */
1449 if (qlogicpti_verify_tmon(qpti))
1450 goto fail_unmap_queues;
1451 }
1452
1453 /* Reset the ISP and init res/req queues. */
1454 if (qlogicpti_reset_hardware(host))
1455 goto fail_unmap_queues;
1456
1457 if (scsi_add_host(host, &dev->dev))
1458 goto fail_unmap_queues;
1459
1460 printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1461 qpti->fware_minrev, qpti->fware_micrev);
1462
1463 fcode = of_get_property(dp, "isp-fcode", NULL);
1464 if (fcode && fcode[0])
1465 printk("(Firmware %s)", fcode);
1466 if (of_find_property(dp, "differential", NULL) != NULL)
1467 qpti->differential = 1;
1468
1469 printk (" [%s Wide, using %s interface]\n",
1470 (qpti->ultra ? "Ultra" : "Fast"),
1471 (qpti->differential ? "differential" : "single ended"));
1472
1473 dev_set_drvdata(&sdev->ofdev.dev, qpti);
1474
1475 qpti_chain_add(qpti);
1476
1477 scsi_scan_host(host);
1478 nqptis++;
1479
1480 return 0;
1481
1482 fail_unmap_queues:
1483 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
1484 sbus_free_consistent(qpti->sdev,
1485 QSIZE(RES_QUEUE_LEN),
1486 qpti->res_cpu, qpti->res_dvma);
1487 sbus_free_consistent(qpti->sdev,
1488 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1489 qpti->req_cpu, qpti->req_dvma);
1490 #undef QSIZE
1491
1492 fail_unmap_regs:
1493 sbus_iounmap(qpti->qregs,
1494 qpti->sdev->reg_addrs[0].reg_size);
1495 if (qpti->is_pti)
1496 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1497
1498 fail_free_irq:
1499 free_irq(qpti->irq, qpti);
1500
1501 fail_unlink:
1502 scsi_host_put(host);
1503
1504 return -ENODEV;
1505 }
1506
1507 static int __devexit qpti_sbus_remove(struct of_device *dev)
1508 {
1509 struct qlogicpti *qpti = dev_get_drvdata(&dev->dev);
1510
1511 qpti_chain_del(qpti);
1512
1513 scsi_remove_host(qpti->qhost);
1514
1515 /* Shut up the card. */
1516 sbus_writew(0, qpti->qregs + SBUS_CTRL);
1517
1518 /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1519 free_irq(qpti->irq, qpti);
1520
1521 #define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN)
1522 sbus_free_consistent(qpti->sdev,
1523 QSIZE(RES_QUEUE_LEN),
1524 qpti->res_cpu, qpti->res_dvma);
1525 sbus_free_consistent(qpti->sdev,
1526 QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1527 qpti->req_cpu, qpti->req_dvma);
1528 #undef QSIZE
1529
1530 sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size);
1531 if (qpti->is_pti)
1532 sbus_iounmap(qpti->sreg, sizeof(unsigned char));
1533
1534 scsi_host_put(qpti->qhost);
1535
1536 return 0;
1537 }
1538
1539 static struct of_device_id qpti_match[] = {
1540 {
1541 .name = "ptisp",
1542 .data = &qpti_template,
1543 },
1544 {
1545 .name = "PTI,ptisp",
1546 .data = &qpti_template,
1547 },
1548 {
1549 .name = "QLGC,isp",
1550 .data = &qpti_template,
1551 },
1552 {
1553 .name = "SUNW,isp",
1554 .data = &qpti_template,
1555 },
1556 {},
1557 };
1558 MODULE_DEVICE_TABLE(of, qpti_match);
1559
1560 static struct of_platform_driver qpti_sbus_driver = {
1561 .name = "qpti",
1562 .match_table = qpti_match,
1563 .probe = qpti_sbus_probe,
1564 .remove = __devexit_p(qpti_sbus_remove),
1565 };
1566
1567 static int __init qpti_init(void)
1568 {
1569 return of_register_driver(&qpti_sbus_driver, &sbus_bus_type);
1570 }
1571
1572 static void __exit qpti_exit(void)
1573 {
1574 of_unregister_driver(&qpti_sbus_driver);
1575 }
1576
1577 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1578 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1579 MODULE_LICENSE("GPL");
1580 MODULE_VERSION("2.0");
1581
1582 module_init(qpti_init);
1583 module_exit(qpti_exit);
A Kernel for the Dreambox dm7025.