[SCSI] megaraid_sas: Fix FastPath I/O to work on degraded raid 1
[linux-2.6.git] / drivers / scsi / qlogicpti.c
1 /* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
2  *
3  * Copyright (C) 1996, 2006, 2008 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/gfp.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 #include <linux/dma-mapping.h>
29 #include <linux/of.h>
30 #include <linux/of_device.h>
31 #include <linux/firmware.h>
32
33 #include <asm/byteorder.h>
34
35 #include "qlogicpti.h"
36
37 #include <asm/dma.h>
38 #include <asm/system.h>
39 #include <asm/ptrace.h>
40 #include <asm/pgtable.h>
41 #include <asm/oplib.h>
42 #include <asm/io.h>
43 #include <asm/irq.h>
44
45 #include <scsi/scsi.h>
46 #include <scsi/scsi_cmnd.h>
47 #include <scsi/scsi_device.h>
48 #include <scsi/scsi_eh.h>
49 #include <scsi/scsi_tcq.h>
50 #include <scsi/scsi_host.h>
51
52 #define MAX_TARGETS     16
53 #define MAX_LUNS        8       /* 32 for 1.31 F/W */
54
55 #define DEFAULT_LOOP_COUNT      10000
56
57 static struct qlogicpti *qptichain = NULL;
58 static DEFINE_SPINLOCK(qptichain_lock);
59
60 #define PACKB(a, b)                     (((a)<<4)|(b))
61
62 static const u_char mbox_param[] = {
63         PACKB(1, 1),    /* MBOX_NO_OP */
64         PACKB(5, 5),    /* MBOX_LOAD_RAM */
65         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
66         PACKB(5, 5),    /* MBOX_DUMP_RAM */
67         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
68         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
69         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
70         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
71         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
72         PACKB(0, 0),    /* 0x0009 */
73         PACKB(0, 0),    /* 0x000a */
74         PACKB(0, 0),    /* 0x000b */
75         PACKB(0, 0),    /* 0x000c */
76         PACKB(0, 0),    /* 0x000d */
77         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
78         PACKB(0, 0),    /* 0x000f */
79         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
80         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
81         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
82         PACKB(2, 2),    /* MBOX_WAKE_UP */
83         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
84         PACKB(4, 4),    /* MBOX_ABORT */
85         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
86         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
87         PACKB(2, 2),    /* MBOX_BUS_RESET */
88         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
89         PACKB(2, 3),    /* MBOX_START_QUEUE */
90         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
91         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
92         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
93         PACKB(0, 0),    /* 0x001e */
94         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
95         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
96         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
97         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
98         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
99         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
100         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
101         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
102         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
103         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
104         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
105         PACKB(0, 0),    /* 0x002a */
106         PACKB(0, 0),    /* 0x002b */
107         PACKB(0, 0),    /* 0x002c */
108         PACKB(0, 0),    /* 0x002d */
109         PACKB(0, 0),    /* 0x002e */
110         PACKB(0, 0),    /* 0x002f */
111         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
112         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
113         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
114         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
115         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
116         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
117         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
118         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
119         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
120         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
121         PACKB(0, 0),    /* 0x003a */
122         PACKB(0, 0),    /* 0x003b */
123         PACKB(0, 0),    /* 0x003c */
124         PACKB(0, 0),    /* 0x003d */
125         PACKB(0, 0),    /* 0x003e */
126         PACKB(0, 0),    /* 0x003f */
127         PACKB(0, 0),    /* 0x0040 */
128         PACKB(0, 0),    /* 0x0041 */
129         PACKB(0, 0)     /* 0x0042 */
130 };
131
132 #define MAX_MBOX_COMMAND        ARRAY_SIZE(mbox_param)
133
134 /* queue length's _must_ be power of two: */
135 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
136 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
137                                                     QLOGICPTI_REQ_QUEUE_LEN)
138 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
139
140 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
141 {
142         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
143                     qpti->qregs + SBUS_CTRL);
144 }
145
146 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
147 {
148         sbus_writew(0, qpti->qregs + SBUS_CTRL);
149 }
150
151 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
152 {
153         u16 val;
154         u8 bursts = qpti->bursts;
155
156 #if 0   /* It appears that at least PTI cards do not support
157          * 64-byte bursts and that setting the B64 bit actually
158          * is a nop and the chip ends up using the smallest burst
159          * size. -DaveM
160          */
161         if (sbus_can_burst64() && (bursts & DMA_BURST64)) {
162                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
163         } else
164 #endif
165         if (bursts & DMA_BURST32) {
166                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
167         } else if (bursts & DMA_BURST16) {
168                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
169         } else if (bursts & DMA_BURST8) {
170                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
171         } else {
172                 val = 0; /* No sbus bursts for you... */
173         }
174         sbus_writew(val, qpti->qregs + SBUS_CFG1);
175 }
176
177 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
178 {
179         int loop_count;
180         u16 tmp;
181
182         if (mbox_param[param[0]] == 0)
183                 return 1;
184
185         /* Set SBUS semaphore. */
186         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
187         tmp |= SBUS_SEMAPHORE_LCK;
188         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
189
190         /* Wait for host IRQ bit to clear. */
191         loop_count = DEFAULT_LOOP_COUNT;
192         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
193                 barrier();
194                 cpu_relax();
195         }
196         if (!loop_count)
197                 printk(KERN_EMERG "qlogicpti%d: mbox_command loop timeout #1\n",
198                        qpti->qpti_id);
199
200         /* Write mailbox command registers. */
201         switch (mbox_param[param[0]] >> 4) {
202         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
203         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
204         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
205         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
206         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
207         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
208         }
209
210         /* Clear RISC interrupt. */
211         tmp = sbus_readw(qpti->qregs + HCCTRL);
212         tmp |= HCCTRL_CRIRQ;
213         sbus_writew(tmp, qpti->qregs + HCCTRL);
214
215         /* Clear SBUS semaphore. */
216         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
217
218         /* Set HOST interrupt. */
219         tmp = sbus_readw(qpti->qregs + HCCTRL);
220         tmp |= HCCTRL_SHIRQ;
221         sbus_writew(tmp, qpti->qregs + HCCTRL);
222
223         /* Wait for HOST interrupt clears. */
224         loop_count = DEFAULT_LOOP_COUNT;
225         while (--loop_count &&
226                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
227                 udelay(20);
228         if (!loop_count)
229                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #2\n",
230                        qpti->qpti_id, param[0]);
231
232         /* Wait for SBUS semaphore to get set. */
233         loop_count = DEFAULT_LOOP_COUNT;
234         while (--loop_count &&
235                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
236                 udelay(20);
237
238                 /* Workaround for some buggy chips. */
239                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
240                         break;
241         }
242         if (!loop_count)
243                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #3\n",
244                        qpti->qpti_id, param[0]);
245
246         /* Wait for MBOX busy condition to go away. */
247         loop_count = DEFAULT_LOOP_COUNT;
248         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
249                 udelay(20);
250         if (!loop_count)
251                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #4\n",
252                        qpti->qpti_id, param[0]);
253
254         /* Read back output parameters. */
255         switch (mbox_param[param[0]] & 0xf) {
256         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
257         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
258         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
259         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
260         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
261         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
262         }
263
264         /* Clear RISC interrupt. */
265         tmp = sbus_readw(qpti->qregs + HCCTRL);
266         tmp |= HCCTRL_CRIRQ;
267         sbus_writew(tmp, qpti->qregs + HCCTRL);
268
269         /* Release SBUS semaphore. */
270         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
271         tmp &= ~(SBUS_SEMAPHORE_LCK);
272         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
273
274         /* We're done. */
275         return 0;
276 }
277
278 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
279 {
280         int i;
281
282         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
283         qpti->host_param.bus_reset_delay = 3;
284         qpti->host_param.retry_count = 0;
285         qpti->host_param.retry_delay = 5;
286         qpti->host_param.async_data_setup_time = 3;
287         qpti->host_param.req_ack_active_negation = 1;
288         qpti->host_param.data_line_active_negation = 1;
289         qpti->host_param.data_dma_burst_enable = 1;
290         qpti->host_param.command_dma_burst_enable = 1;
291         qpti->host_param.tag_aging = 8;
292         qpti->host_param.selection_timeout = 250;
293         qpti->host_param.max_queue_depth = 256;
294
295         for(i = 0; i < MAX_TARGETS; i++) {
296                 /*
297                  * disconnect, parity, arq, reneg on reset, and, oddly enough
298                  * tags...the midlayer's notion of tagged support has to match
299                  * our device settings, and since we base whether we enable a
300                  * tag on a  per-cmnd basis upon what the midlayer sez, we
301                  * actually enable the capability here.
302                  */
303                 qpti->dev_param[i].device_flags = 0xcd;
304                 qpti->dev_param[i].execution_throttle = 16;
305                 if (qpti->ultra) {
306                         qpti->dev_param[i].synchronous_period = 12;
307                         qpti->dev_param[i].synchronous_offset = 8;
308                 } else {
309                         qpti->dev_param[i].synchronous_period = 25;
310                         qpti->dev_param[i].synchronous_offset = 12;
311                 }
312                 qpti->dev_param[i].device_enable = 1;
313         }
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%d: reset_hardware loop timeout\n",
346                        qpti->qpti_id);
347
348         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
349         set_sbus_cfg1(qpti);
350         qlogicpti_enable_irqs(qpti);
351
352         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
353                 qpti->ultra = 1;
354                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
355                             qpti->qregs + RISC_MTREG);
356         } else {
357                 qpti->ultra = 0;
358                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
359                             qpti->qregs + RISC_MTREG);
360         }
361
362         /* reset adapter and per-device default values. */
363         /* do it after finding out whether we're ultra mode capable */
364         qlogicpti_set_hostdev_defaults(qpti);
365
366         /* Release the RISC processor. */
367         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
368
369         /* Get RISC to start executing the firmware code. */
370         param[0] = MBOX_EXEC_FIRMWARE;
371         param[1] = risc_code_addr;
372         if (qlogicpti_mbox_command(qpti, param, 1)) {
373                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
374                        qpti->qpti_id);
375                 spin_unlock_irqrestore(host->host_lock, flags);
376                 return 1;
377         }
378
379         /* Set initiator scsi ID. */
380         param[0] = MBOX_SET_INIT_SCSI_ID;
381         param[1] = qpti->host_param.initiator_scsi_id;
382         if (qlogicpti_mbox_command(qpti, param, 1) ||
383            (param[0] != MBOX_COMMAND_COMPLETE)) {
384                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
385                        qpti->qpti_id);
386                 spin_unlock_irqrestore(host->host_lock, flags);
387                 return 1;
388         }
389
390         /* Initialize state of the queues, both hw and sw. */
391         qpti->req_in_ptr = qpti->res_out_ptr = 0;
392
393         param[0] = MBOX_INIT_RES_QUEUE;
394         param[1] = RES_QUEUE_LEN + 1;
395         param[2] = (u_short) (qpti->res_dvma >> 16);
396         param[3] = (u_short) (qpti->res_dvma & 0xffff);
397         param[4] = param[5] = 0;
398         if (qlogicpti_mbox_command(qpti, param, 1)) {
399                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
400                        qpti->qpti_id);
401                 spin_unlock_irqrestore(host->host_lock, flags);
402                 return 1;
403         }
404
405         param[0] = MBOX_INIT_REQ_QUEUE;
406         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
407         param[2] = (u_short) (qpti->req_dvma >> 16);
408         param[3] = (u_short) (qpti->req_dvma & 0xffff);
409         param[4] = param[5] = 0;
410         if (qlogicpti_mbox_command(qpti, param, 1)) {
411                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
412                        qpti->qpti_id);
413                 spin_unlock_irqrestore(host->host_lock, flags);
414                 return 1;
415         }
416
417         param[0] = MBOX_SET_RETRY_COUNT;
418         param[1] = qpti->host_param.retry_count;
419         param[2] = qpti->host_param.retry_delay;
420         qlogicpti_mbox_command(qpti, param, 0);
421
422         param[0] = MBOX_SET_TAG_AGE_LIMIT;
423         param[1] = qpti->host_param.tag_aging;
424         qlogicpti_mbox_command(qpti, param, 0);
425
426         for (i = 0; i < MAX_TARGETS; i++) {
427                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
428                 param[1] = (i << 8);
429                 qlogicpti_mbox_command(qpti, param, 0);
430         }
431
432         param[0] = MBOX_GET_FIRMWARE_STATUS;
433         qlogicpti_mbox_command(qpti, param, 0);
434
435         param[0] = MBOX_SET_SELECT_TIMEOUT;
436         param[1] = qpti->host_param.selection_timeout;
437         qlogicpti_mbox_command(qpti, param, 0);
438
439         for (i = 0; i < MAX_TARGETS; i++) {
440                 param[0] = MBOX_SET_TARGET_PARAMS;
441                 param[1] = (i << 8);
442                 param[2] = (qpti->dev_param[i].device_flags << 8);
443                 /*
444                  * Since we're now loading 1.31 f/w, force narrow/async.
445                  */
446                 param[2] |= 0xc0;
447                 param[3] = 0;   /* no offset, we do not have sync mode yet */
448                 qlogicpti_mbox_command(qpti, param, 0);
449         }
450
451         /*
452          * Always (sigh) do an initial bus reset (kicks f/w).
453          */
454         param[0] = MBOX_BUS_RESET;
455         param[1] = qpti->host_param.bus_reset_delay;
456         qlogicpti_mbox_command(qpti, param, 0);
457         qpti->send_marker = 1;
458
459         spin_unlock_irqrestore(host->host_lock, flags);
460         return 0;
461 }
462
463 #define PTI_RESET_LIMIT 400
464
465 static int __devinit qlogicpti_load_firmware(struct qlogicpti *qpti)
466 {
467         const struct firmware *fw;
468         const char fwname[] = "qlogic/isp1000.bin";
469         const __le16 *fw_data;
470         struct Scsi_Host *host = qpti->qhost;
471         unsigned short csum = 0;
472         unsigned short param[6];
473         unsigned short risc_code_addr, risc_code_length;
474         int err;
475         unsigned long flags;
476         int i, timeout;
477
478         err = request_firmware(&fw, fwname, &qpti->op->dev);
479         if (err) {
480                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
481                        fwname, err);
482                 return err;
483         }
484         if (fw->size % 2) {
485                 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
486                        fw->size, fwname);
487                 err = -EINVAL;
488                 goto outfirm;
489         }
490         fw_data = (const __le16 *)&fw->data[0];
491         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
492         risc_code_length = fw->size / 2;
493
494         spin_lock_irqsave(host->host_lock, flags);
495
496         /* Verify the checksum twice, one before loading it, and once
497          * afterwards via the mailbox commands.
498          */
499         for (i = 0; i < risc_code_length; i++)
500                 csum += __le16_to_cpu(fw_data[i]);
501         if (csum) {
502                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
503                        qpti->qpti_id);
504                 err = 1;
505                 goto out;
506         }               
507         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
508         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
509         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
510         timeout = PTI_RESET_LIMIT;
511         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
512                 udelay(20);
513         if (!timeout) {
514                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
515                 err = 1;
516                 goto out;
517         }
518
519         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
520         mdelay(1);
521
522         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
523         set_sbus_cfg1(qpti);
524         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
525
526         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
527                 qpti->ultra = 1;
528                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
529                             qpti->qregs + RISC_MTREG);
530         } else {
531                 qpti->ultra = 0;
532                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
533                             qpti->qregs + RISC_MTREG);
534         }
535
536         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
537
538         /* Pin lines are only stable while RISC is paused. */
539         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
540         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
541                 qpti->differential = 1;
542         else
543                 qpti->differential = 0;
544         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
545
546         /* This shouldn't be necessary- we've reset things so we should be
547            running from the ROM now.. */
548
549         param[0] = MBOX_STOP_FIRMWARE;
550         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
551         if (qlogicpti_mbox_command(qpti, param, 1)) {
552                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
553                        qpti->qpti_id);
554                 err = 1;
555                 goto out;
556         }               
557
558         /* Load it up.. */
559         for (i = 0; i < risc_code_length; i++) {
560                 param[0] = MBOX_WRITE_RAM_WORD;
561                 param[1] = risc_code_addr + i;
562                 param[2] = __le16_to_cpu(fw_data[i]);
563                 if (qlogicpti_mbox_command(qpti, param, 1) ||
564                     param[0] != MBOX_COMMAND_COMPLETE) {
565                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
566                                qpti->qpti_id);
567                         err = 1;
568                         goto out;
569                 }
570         }
571
572         /* Reset the ISP again. */
573         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
574         mdelay(1);
575
576         qlogicpti_enable_irqs(qpti);
577         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
578         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
579
580         /* Ask ISP to verify the checksum of the new code. */
581         param[0] = MBOX_VERIFY_CHECKSUM;
582         param[1] = risc_code_addr;
583         if (qlogicpti_mbox_command(qpti, param, 1) ||
584             (param[0] != MBOX_COMMAND_COMPLETE)) {
585                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
586                        qpti->qpti_id);
587                 err = 1;
588                 goto out;
589         }
590
591         /* Start using newly downloaded firmware. */
592         param[0] = MBOX_EXEC_FIRMWARE;
593         param[1] = risc_code_addr;
594         qlogicpti_mbox_command(qpti, param, 1);
595
596         param[0] = MBOX_ABOUT_FIRMWARE;
597         if (qlogicpti_mbox_command(qpti, param, 1) ||
598             (param[0] != MBOX_COMMAND_COMPLETE)) {
599                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
600                        qpti->qpti_id);
601                 err = 1;
602                 goto out;
603         }
604
605         /* Snag the major and minor revisions from the result. */
606         qpti->fware_majrev = param[1];
607         qpti->fware_minrev = param[2];
608         qpti->fware_micrev = param[3];
609
610         /* Set the clock rate */
611         param[0] = MBOX_SET_CLOCK_RATE;
612         param[1] = qpti->clock;
613         if (qlogicpti_mbox_command(qpti, param, 1) ||
614             (param[0] != MBOX_COMMAND_COMPLETE)) {
615                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
616                        qpti->qpti_id);
617                 err = 1;
618                 goto out;
619         }
620
621         if (qpti->is_pti != 0) {
622                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
623                 param[0] = MBOX_WRITE_RAM_WORD;
624                 param[1] = 0xff80;
625                 param[2] = (unsigned short) qpti->scsi_id;
626                 qlogicpti_mbox_command(qpti, param, 1);
627
628                 param[0] = MBOX_WRITE_RAM_WORD;
629                 param[1] = 0xff00;
630                 param[2] = (unsigned short) 3;
631                 qlogicpti_mbox_command(qpti, param, 1);
632         }
633
634 out:
635         spin_unlock_irqrestore(host->host_lock, flags);
636 outfirm:
637         release_firmware(fw);
638         return err;
639 }
640
641 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
642 {
643         int curstat = sbus_readb(qpti->sreg);
644
645         curstat &= 0xf0;
646         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
647                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
648         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
649                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
650         if (curstat != qpti->swsreg) {
651                 int error = 0;
652                 if (curstat & SREG_FUSE) {
653                         error++;
654                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
655                 }
656                 if (curstat & SREG_TPOWER) {
657                         error++;
658                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
659                 }
660                 if (qpti->differential &&
661                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
662                         error++;
663                         printk("qlogicpti%d: You have a single ended device on a "
664                                "differential bus!  Please fix!\n", qpti->qpti_id);
665                 }
666                 qpti->swsreg = curstat;
667                 return error;
668         }
669         return 0;
670 }
671
672 static irqreturn_t qpti_intr(int irq, void *dev_id);
673
674 static void __devinit qpti_chain_add(struct qlogicpti *qpti)
675 {
676         spin_lock_irq(&qptichain_lock);
677         if (qptichain != NULL) {
678                 struct qlogicpti *qlink = qptichain;
679
680                 while(qlink->next)
681                         qlink = qlink->next;
682                 qlink->next = qpti;
683         } else {
684                 qptichain = qpti;
685         }
686         qpti->next = NULL;
687         spin_unlock_irq(&qptichain_lock);
688 }
689
690 static void __devexit qpti_chain_del(struct qlogicpti *qpti)
691 {
692         spin_lock_irq(&qptichain_lock);
693         if (qptichain == qpti) {
694                 qptichain = qpti->next;
695         } else {
696                 struct qlogicpti *qlink = qptichain;
697                 while(qlink->next != qpti)
698                         qlink = qlink->next;
699                 qlink->next = qpti->next;
700         }
701         qpti->next = NULL;
702         spin_unlock_irq(&qptichain_lock);
703 }
704
705 static int __devinit qpti_map_regs(struct qlogicpti *qpti)
706 {
707         struct platform_device *op = qpti->op;
708
709         qpti->qregs = of_ioremap(&op->resource[0], 0,
710                                  resource_size(&op->resource[0]),
711                                  "PTI Qlogic/ISP");
712         if (!qpti->qregs) {
713                 printk("PTI: Qlogic/ISP registers are unmappable\n");
714                 return -1;
715         }
716         if (qpti->is_pti) {
717                 qpti->sreg = of_ioremap(&op->resource[0], (16 * 4096),
718                                         sizeof(unsigned char),
719                                         "PTI Qlogic/ISP statreg");
720                 if (!qpti->sreg) {
721                         printk("PTI: Qlogic/ISP status register is unmappable\n");
722                         return -1;
723                 }
724         }
725         return 0;
726 }
727
728 static int __devinit qpti_register_irq(struct qlogicpti *qpti)
729 {
730         struct platform_device *op = qpti->op;
731
732         qpti->qhost->irq = qpti->irq = op->archdata.irqs[0];
733
734         /* We used to try various overly-clever things to
735          * reduce the interrupt processing overhead on
736          * sun4c/sun4m when multiple PTI's shared the
737          * same IRQ.  It was too complex and messy to
738          * sanely maintain.
739          */
740         if (request_irq(qpti->irq, qpti_intr,
741                         IRQF_SHARED, "QlogicPTI", qpti))
742                 goto fail;
743
744         printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
745
746         return 0;
747
748 fail:
749         printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
750         return -1;
751 }
752
753 static void __devinit qpti_get_scsi_id(struct qlogicpti *qpti)
754 {
755         struct platform_device *op = qpti->op;
756         struct device_node *dp;
757
758         dp = op->dev.of_node;
759
760         qpti->scsi_id = of_getintprop_default(dp, "initiator-id", -1);
761         if (qpti->scsi_id == -1)
762                 qpti->scsi_id = of_getintprop_default(dp, "scsi-initiator-id",
763                                                       -1);
764         if (qpti->scsi_id == -1)
765                 qpti->scsi_id =
766                         of_getintprop_default(dp->parent,
767                                               "scsi-initiator-id", 7);
768         qpti->qhost->this_id = qpti->scsi_id;
769         qpti->qhost->max_sectors = 64;
770
771         printk("SCSI ID %d ", qpti->scsi_id);
772 }
773
774 static void qpti_get_bursts(struct qlogicpti *qpti)
775 {
776         struct platform_device *op = qpti->op;
777         u8 bursts, bmask;
778
779         bursts = of_getintprop_default(op->dev.of_node, "burst-sizes", 0xff);
780         bmask = of_getintprop_default(op->dev.of_node->parent, "burst-sizes", 0xff);
781         if (bmask != 0xff)
782                 bursts &= bmask;
783         if (bursts == 0xff ||
784             (bursts & DMA_BURST16) == 0 ||
785             (bursts & DMA_BURST32) == 0)
786                 bursts = (DMA_BURST32 - 1);
787
788         qpti->bursts = bursts;
789 }
790
791 static void qpti_get_clock(struct qlogicpti *qpti)
792 {
793         unsigned int cfreq;
794
795         /* Check for what the clock input to this card is.
796          * Default to 40Mhz.
797          */
798         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
799         qpti->clock = (cfreq + 500000)/1000000;
800         if (qpti->clock == 0) /* bullshit */
801                 qpti->clock = 40;
802 }
803
804 /* The request and response queues must each be aligned
805  * on a page boundary.
806  */
807 static int __devinit qpti_map_queues(struct qlogicpti *qpti)
808 {
809         struct platform_device *op = qpti->op;
810
811 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
812         qpti->res_cpu = dma_alloc_coherent(&op->dev,
813                                            QSIZE(RES_QUEUE_LEN),
814                                            &qpti->res_dvma, GFP_ATOMIC);
815         if (qpti->res_cpu == NULL ||
816             qpti->res_dvma == 0) {
817                 printk("QPTI: Cannot map response queue.\n");
818                 return -1;
819         }
820
821         qpti->req_cpu = dma_alloc_coherent(&op->dev,
822                                            QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
823                                            &qpti->req_dvma, GFP_ATOMIC);
824         if (qpti->req_cpu == NULL ||
825             qpti->req_dvma == 0) {
826                 dma_free_coherent(&op->dev, QSIZE(RES_QUEUE_LEN),
827                                   qpti->res_cpu, qpti->res_dvma);
828                 printk("QPTI: Cannot map request queue.\n");
829                 return -1;
830         }
831         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
832         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
833         return 0;
834 }
835
836 const char *qlogicpti_info(struct Scsi_Host *host)
837 {
838         static char buf[80];
839         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
840
841         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
842                 qpti->qhost->irq, qpti->qregs);
843         return buf;
844 }
845
846 /* I am a certified frobtronicist. */
847 static inline void marker_frob(struct Command_Entry *cmd)
848 {
849         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
850
851         memset(marker, 0, sizeof(struct Marker_Entry));
852         marker->hdr.entry_cnt = 1;
853         marker->hdr.entry_type = ENTRY_MARKER;
854         marker->modifier = SYNC_ALL;
855         marker->rsvd = 0;
856 }
857
858 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
859                             struct qlogicpti *qpti)
860 {
861         memset(cmd, 0, sizeof(struct Command_Entry));
862         cmd->hdr.entry_cnt = 1;
863         cmd->hdr.entry_type = ENTRY_COMMAND;
864         cmd->target_id = Cmnd->device->id;
865         cmd->target_lun = Cmnd->device->lun;
866         cmd->cdb_length = Cmnd->cmd_len;
867         cmd->control_flags = 0;
868         if (Cmnd->device->tagged_supported) {
869                 if (qpti->cmd_count[Cmnd->device->id] == 0)
870                         qpti->tag_ages[Cmnd->device->id] = jiffies;
871                 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
872                         cmd->control_flags = CFLAG_ORDERED_TAG;
873                         qpti->tag_ages[Cmnd->device->id] = jiffies;
874                 } else
875                         cmd->control_flags = CFLAG_SIMPLE_TAG;
876         }
877         if ((Cmnd->cmnd[0] == WRITE_6) ||
878             (Cmnd->cmnd[0] == WRITE_10) ||
879             (Cmnd->cmnd[0] == WRITE_12))
880                 cmd->control_flags |= CFLAG_WRITE;
881         else
882                 cmd->control_flags |= CFLAG_READ;
883         cmd->time_out = 30;
884         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
885 }
886
887 /* Do it to it baby. */
888 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
889                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
890 {
891         struct dataseg *ds;
892         struct scatterlist *sg, *s;
893         int i, n;
894
895         if (scsi_bufflen(Cmnd)) {
896                 int sg_count;
897
898                 sg = scsi_sglist(Cmnd);
899                 sg_count = dma_map_sg(&qpti->op->dev, sg,
900                                       scsi_sg_count(Cmnd),
901                                       Cmnd->sc_data_direction);
902
903                 ds = cmd->dataseg;
904                 cmd->segment_cnt = sg_count;
905
906                 /* Fill in first four sg entries: */
907                 n = sg_count;
908                 if (n > 4)
909                         n = 4;
910                 for_each_sg(sg, s, n, i) {
911                         ds[i].d_base = sg_dma_address(s);
912                         ds[i].d_count = sg_dma_len(s);
913                 }
914                 sg_count -= 4;
915                 sg = s;
916                 while (sg_count > 0) {
917                         struct Continuation_Entry *cont;
918
919                         ++cmd->hdr.entry_cnt;
920                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
921                         in_ptr = NEXT_REQ_PTR(in_ptr);
922                         if (in_ptr == out_ptr)
923                                 return -1;
924
925                         cont->hdr.entry_type = ENTRY_CONTINUATION;
926                         cont->hdr.entry_cnt = 0;
927                         cont->hdr.sys_def_1 = 0;
928                         cont->hdr.flags = 0;
929                         cont->reserved = 0;
930                         ds = cont->dataseg;
931                         n = sg_count;
932                         if (n > 7)
933                                 n = 7;
934                         for_each_sg(sg, s, n, i) {
935                                 ds[i].d_base = sg_dma_address(s);
936                                 ds[i].d_count = sg_dma_len(s);
937                         }
938                         sg_count -= n;
939                         sg = s;
940                 }
941         } else {
942                 cmd->dataseg[0].d_base = 0;
943                 cmd->dataseg[0].d_count = 0;
944                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
945         }
946
947         /* Committed, record Scsi_Cmd so we can find it later. */
948         cmd->handle = in_ptr;
949         qpti->cmd_slots[in_ptr] = Cmnd;
950
951         qpti->cmd_count[Cmnd->device->id]++;
952         sbus_writew(in_ptr, qpti->qregs + MBOX4);
953         qpti->req_in_ptr = in_ptr;
954
955         return in_ptr;
956 }
957
958 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
959 {
960         /* Temporary workaround until bug is found and fixed (one bug has been found
961            already, but fixing it makes things even worse) -jj */
962         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
963         host->can_queue = host->host_busy + num_free;
964         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
965 }
966
967 static int qlogicpti_slave_configure(struct scsi_device *sdev)
968 {
969         struct qlogicpti *qpti = shost_priv(sdev->host);
970         int tgt = sdev->id;
971         u_short param[6];
972
973         /* tags handled in midlayer */
974         /* enable sync mode? */
975         if (sdev->sdtr) {
976                 qpti->dev_param[tgt].device_flags |= 0x10;
977         } else {
978                 qpti->dev_param[tgt].synchronous_offset = 0;
979                 qpti->dev_param[tgt].synchronous_period = 0;
980         }
981         /* are we wide capable? */
982         if (sdev->wdtr)
983                 qpti->dev_param[tgt].device_flags |= 0x20;
984
985         param[0] = MBOX_SET_TARGET_PARAMS;
986         param[1] = (tgt << 8);
987         param[2] = (qpti->dev_param[tgt].device_flags << 8);
988         if (qpti->dev_param[tgt].device_flags & 0x10) {
989                 param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
990                         qpti->dev_param[tgt].synchronous_period;
991         } else {
992                 param[3] = 0;
993         }
994         qlogicpti_mbox_command(qpti, param, 0);
995         return 0;
996 }
997
998 /*
999  * The middle SCSI layer ensures that queuecommand never gets invoked
1000  * concurrently with itself or the interrupt handler (though the
1001  * interrupt handler may call this routine as part of
1002  * request-completion handling).
1003  *
1004  * "This code must fly." -davem
1005  */
1006 static int qlogicpti_queuecommand_lck(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1007 {
1008         struct Scsi_Host *host = Cmnd->device->host;
1009         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1010         struct Command_Entry *cmd;
1011         u_int out_ptr;
1012         int in_ptr;
1013
1014         Cmnd->scsi_done = done;
1015
1016         in_ptr = qpti->req_in_ptr;
1017         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1018         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1019         in_ptr = NEXT_REQ_PTR(in_ptr);
1020         if (in_ptr == out_ptr)
1021                 goto toss_command;
1022
1023         if (qpti->send_marker) {
1024                 marker_frob(cmd);
1025                 qpti->send_marker = 0;
1026                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1027                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1028                         qpti->req_in_ptr = in_ptr;
1029                         goto toss_command;
1030                 }
1031                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1032                 in_ptr = NEXT_REQ_PTR(in_ptr);
1033         }
1034         cmd_frob(cmd, Cmnd, qpti);
1035         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1036                 goto toss_command;
1037
1038         update_can_queue(host, in_ptr, out_ptr);
1039
1040         return 0;
1041
1042 toss_command:
1043         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1044                qpti->qpti_id);
1045
1046         /* Unfortunately, unless you use the new EH code, which
1047          * we don't, the midlayer will ignore the return value,
1048          * which is insane.  We pick up the pieces like this.
1049          */
1050         Cmnd->result = DID_BUS_BUSY;
1051         done(Cmnd);
1052         return 1;
1053 }
1054
1055 static DEF_SCSI_QCMD(qlogicpti_queuecommand)
1056
1057 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1058 {
1059         int host_status = DID_ERROR;
1060
1061         switch (sts->completion_status) {
1062               case CS_COMPLETE:
1063                 host_status = DID_OK;
1064                 break;
1065               case CS_INCOMPLETE:
1066                 if (!(sts->state_flags & SF_GOT_BUS))
1067                         host_status = DID_NO_CONNECT;
1068                 else if (!(sts->state_flags & SF_GOT_TARGET))
1069                         host_status = DID_BAD_TARGET;
1070                 else if (!(sts->state_flags & SF_SENT_CDB))
1071                         host_status = DID_ERROR;
1072                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1073                         host_status = DID_ERROR;
1074                 else if (!(sts->state_flags & SF_GOT_STATUS))
1075                         host_status = DID_ERROR;
1076                 else if (!(sts->state_flags & SF_GOT_SENSE))
1077                         host_status = DID_ERROR;
1078                 break;
1079               case CS_DMA_ERROR:
1080               case CS_TRANSPORT_ERROR:
1081                 host_status = DID_ERROR;
1082                 break;
1083               case CS_RESET_OCCURRED:
1084               case CS_BUS_RESET:
1085                 host_status = DID_RESET;
1086                 break;
1087               case CS_ABORTED:
1088                 host_status = DID_ABORT;
1089                 break;
1090               case CS_TIMEOUT:
1091                 host_status = DID_TIME_OUT;
1092                 break;
1093               case CS_DATA_OVERRUN:
1094               case CS_COMMAND_OVERRUN:
1095               case CS_STATUS_OVERRUN:
1096               case CS_BAD_MESSAGE:
1097               case CS_NO_MESSAGE_OUT:
1098               case CS_EXT_ID_FAILED:
1099               case CS_IDE_MSG_FAILED:
1100               case CS_ABORT_MSG_FAILED:
1101               case CS_NOP_MSG_FAILED:
1102               case CS_PARITY_ERROR_MSG_FAILED:
1103               case CS_DEVICE_RESET_MSG_FAILED:
1104               case CS_ID_MSG_FAILED:
1105               case CS_UNEXP_BUS_FREE:
1106                 host_status = DID_ERROR;
1107                 break;
1108               case CS_DATA_UNDERRUN:
1109                 host_status = DID_OK;
1110                 break;
1111               default:
1112                 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1113                        id, sts->completion_status);
1114                 host_status = DID_ERROR;
1115                 break;
1116         }
1117
1118         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1119 }
1120
1121 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1122 {
1123         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1124         struct Status_Entry *sts;
1125         u_int in_ptr, out_ptr;
1126
1127         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1128                 return NULL;
1129                 
1130         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1131         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1132         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1133                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1134                 case ASYNC_SCSI_BUS_RESET:
1135                 case EXECUTION_TIMEOUT_RESET:
1136                         qpti->send_marker = 1;
1137                         break;
1138                 case INVALID_COMMAND:
1139                 case HOST_INTERFACE_ERROR:
1140                 case COMMAND_ERROR:
1141                 case COMMAND_PARAM_ERROR:
1142                         break;
1143                 };
1144                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1145         }
1146
1147         /* This looks like a network driver! */
1148         out_ptr = qpti->res_out_ptr;
1149         while (out_ptr != in_ptr) {
1150                 u_int cmd_slot;
1151
1152                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1153                 out_ptr = NEXT_RES_PTR(out_ptr);
1154
1155                 /* We store an index in the handle, not the pointer in
1156                  * some form.  This avoids problems due to the fact
1157                  * that the handle provided is only 32-bits. -DaveM
1158                  */
1159                 cmd_slot = sts->handle;
1160                 Cmnd = qpti->cmd_slots[cmd_slot];
1161                 qpti->cmd_slots[cmd_slot] = NULL;
1162
1163                 if (sts->completion_status == CS_RESET_OCCURRED ||
1164                     sts->completion_status == CS_ABORTED ||
1165                     (sts->status_flags & STF_BUS_RESET))
1166                         qpti->send_marker = 1;
1167
1168                 if (sts->state_flags & SF_GOT_SENSE)
1169                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1170                                SCSI_SENSE_BUFFERSIZE);
1171
1172                 if (sts->hdr.entry_type == ENTRY_STATUS)
1173                         Cmnd->result =
1174                             qlogicpti_return_status(sts, qpti->qpti_id);
1175                 else
1176                         Cmnd->result = DID_ERROR << 16;
1177
1178                 if (scsi_bufflen(Cmnd))
1179                         dma_unmap_sg(&qpti->op->dev,
1180                                      scsi_sglist(Cmnd), scsi_sg_count(Cmnd),
1181                                      Cmnd->sc_data_direction);
1182
1183                 qpti->cmd_count[Cmnd->device->id]--;
1184                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1185                 Cmnd->host_scribble = (unsigned char *) done_queue;
1186                 done_queue = Cmnd;
1187         }
1188         qpti->res_out_ptr = out_ptr;
1189
1190         return done_queue;
1191 }
1192
1193 static irqreturn_t qpti_intr(int irq, void *dev_id)
1194 {
1195         struct qlogicpti *qpti = dev_id;
1196         unsigned long flags;
1197         struct scsi_cmnd *dq;
1198
1199         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1200         dq = qlogicpti_intr_handler(qpti);
1201
1202         if (dq != NULL) {
1203                 do {
1204                         struct scsi_cmnd *next;
1205
1206                         next = (struct scsi_cmnd *) dq->host_scribble;
1207                         dq->scsi_done(dq);
1208                         dq = next;
1209                 } while (dq != NULL);
1210         }
1211         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1212
1213         return IRQ_HANDLED;
1214 }
1215
1216 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1217 {
1218         u_short param[6];
1219         struct Scsi_Host *host = Cmnd->device->host;
1220         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1221         int return_status = SUCCESS;
1222         u32 cmd_cookie;
1223         int i;
1224
1225         printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1226                qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1227
1228         qlogicpti_disable_irqs(qpti);
1229
1230         /* Find the 32-bit cookie we gave to the firmware for
1231          * this command.
1232          */
1233         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1234                 if (qpti->cmd_slots[i] == Cmnd)
1235                         break;
1236         cmd_cookie = i;
1237
1238         param[0] = MBOX_ABORT;
1239         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1240         param[2] = cmd_cookie >> 16;
1241         param[3] = cmd_cookie & 0xffff;
1242         if (qlogicpti_mbox_command(qpti, param, 0) ||
1243             (param[0] != MBOX_COMMAND_COMPLETE)) {
1244                 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1245                        qpti->qpti_id, param[0]);
1246                 return_status = FAILED;
1247         }
1248
1249         qlogicpti_enable_irqs(qpti);
1250
1251         return return_status;
1252 }
1253
1254 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1255 {
1256         u_short param[6];
1257         struct Scsi_Host *host = Cmnd->device->host;
1258         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1259         int return_status = SUCCESS;
1260
1261         printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1262                qpti->qpti_id);
1263
1264         qlogicpti_disable_irqs(qpti);
1265
1266         param[0] = MBOX_BUS_RESET;
1267         param[1] = qpti->host_param.bus_reset_delay;
1268         if (qlogicpti_mbox_command(qpti, param, 0) ||
1269            (param[0] != MBOX_COMMAND_COMPLETE)) {
1270                 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1271                        qpti->qpti_id, param[0]);
1272                 return_status = FAILED;
1273         }
1274
1275         qlogicpti_enable_irqs(qpti);
1276
1277         return return_status;
1278 }
1279
1280 static struct scsi_host_template qpti_template = {
1281         .module                 = THIS_MODULE,
1282         .name                   = "qlogicpti",
1283         .info                   = qlogicpti_info,
1284         .queuecommand           = qlogicpti_queuecommand,
1285         .slave_configure        = qlogicpti_slave_configure,
1286         .eh_abort_handler       = qlogicpti_abort,
1287         .eh_bus_reset_handler   = qlogicpti_reset,
1288         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1289         .this_id                = 7,
1290         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1291         .cmd_per_lun            = 1,
1292         .use_clustering         = ENABLE_CLUSTERING,
1293 };
1294
1295 static const struct of_device_id qpti_match[];
1296 static int __devinit qpti_sbus_probe(struct platform_device *op)
1297 {
1298         const struct of_device_id *match;
1299         struct scsi_host_template *tpnt;
1300         struct device_node *dp = op->dev.of_node;
1301         struct Scsi_Host *host;
1302         struct qlogicpti *qpti;
1303         static int nqptis;
1304         const char *fcode;
1305
1306         match = of_match_device(qpti_match, &op->dev);
1307         if (!match)
1308                 return -EINVAL;
1309         tpnt = match->data;
1310
1311         /* Sometimes Antares cards come up not completely
1312          * setup, and we get a report of a zero IRQ.
1313          */
1314         if (op->archdata.irqs[0] == 0)
1315                 return -ENODEV;
1316
1317         host = scsi_host_alloc(tpnt, sizeof(struct qlogicpti));
1318         if (!host)
1319                 return -ENOMEM;
1320
1321         qpti = shost_priv(host);
1322
1323         host->max_id = MAX_TARGETS;
1324         qpti->qhost = host;
1325         qpti->op = op;
1326         qpti->qpti_id = nqptis;
1327         strcpy(qpti->prom_name, op->dev.of_node->name);
1328         qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1329
1330         if (qpti_map_regs(qpti) < 0)
1331                 goto fail_unlink;
1332
1333         if (qpti_register_irq(qpti) < 0)
1334                 goto fail_unmap_regs;
1335
1336         qpti_get_scsi_id(qpti);
1337         qpti_get_bursts(qpti);
1338         qpti_get_clock(qpti);
1339
1340         /* Clear out scsi_cmnd array. */
1341         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1342
1343         if (qpti_map_queues(qpti) < 0)
1344                 goto fail_free_irq;
1345
1346         /* Load the firmware. */
1347         if (qlogicpti_load_firmware(qpti))
1348                 goto fail_unmap_queues;
1349         if (qpti->is_pti) {
1350                 /* Check the PTI status reg. */
1351                 if (qlogicpti_verify_tmon(qpti))
1352                         goto fail_unmap_queues;
1353         }
1354
1355         /* Reset the ISP and init res/req queues. */
1356         if (qlogicpti_reset_hardware(host))
1357                 goto fail_unmap_queues;
1358
1359         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1360                qpti->fware_minrev, qpti->fware_micrev);
1361
1362         fcode = of_get_property(dp, "isp-fcode", NULL);
1363         if (fcode && fcode[0])
1364                 printk("(FCode %s)", fcode);
1365         if (of_find_property(dp, "differential", NULL) != NULL)
1366                 qpti->differential = 1;
1367                         
1368         printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1369                 qpti->qpti_id,
1370                 (qpti->ultra ? "Ultra" : "Fast"),
1371                 (qpti->differential ? "differential" : "single ended"));
1372
1373         if (scsi_add_host(host, &op->dev)) {
1374                 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1375                 goto fail_unmap_queues;
1376         }
1377
1378         dev_set_drvdata(&op->dev, qpti);
1379
1380         qpti_chain_add(qpti);
1381
1382         scsi_scan_host(host);
1383         nqptis++;
1384
1385         return 0;
1386
1387 fail_unmap_queues:
1388 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1389         dma_free_coherent(&op->dev,
1390                           QSIZE(RES_QUEUE_LEN),
1391                           qpti->res_cpu, qpti->res_dvma);
1392         dma_free_coherent(&op->dev,
1393                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1394                           qpti->req_cpu, qpti->req_dvma);
1395 #undef QSIZE
1396
1397 fail_unmap_regs:
1398         of_iounmap(&op->resource[0], qpti->qregs,
1399                    resource_size(&op->resource[0]));
1400         if (qpti->is_pti)
1401                 of_iounmap(&op->resource[0], qpti->sreg,
1402                            sizeof(unsigned char));
1403
1404 fail_free_irq:
1405         free_irq(qpti->irq, qpti);
1406
1407 fail_unlink:
1408         scsi_host_put(host);
1409
1410         return -ENODEV;
1411 }
1412
1413 static int __devexit qpti_sbus_remove(struct platform_device *op)
1414 {
1415         struct qlogicpti *qpti = dev_get_drvdata(&op->dev);
1416
1417         qpti_chain_del(qpti);
1418
1419         scsi_remove_host(qpti->qhost);
1420
1421         /* Shut up the card. */
1422         sbus_writew(0, qpti->qregs + SBUS_CTRL);
1423
1424         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1425         free_irq(qpti->irq, qpti);
1426
1427 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1428         dma_free_coherent(&op->dev,
1429                           QSIZE(RES_QUEUE_LEN),
1430                           qpti->res_cpu, qpti->res_dvma);
1431         dma_free_coherent(&op->dev,
1432                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1433                           qpti->req_cpu, qpti->req_dvma);
1434 #undef QSIZE
1435
1436         of_iounmap(&op->resource[0], qpti->qregs,
1437                    resource_size(&op->resource[0]));
1438         if (qpti->is_pti)
1439                 of_iounmap(&op->resource[0], qpti->sreg, sizeof(unsigned char));
1440
1441         scsi_host_put(qpti->qhost);
1442
1443         return 0;
1444 }
1445
1446 static const struct of_device_id qpti_match[] = {
1447         {
1448                 .name = "ptisp",
1449                 .data = &qpti_template,
1450         },
1451         {
1452                 .name = "PTI,ptisp",
1453                 .data = &qpti_template,
1454         },
1455         {
1456                 .name = "QLGC,isp",
1457                 .data = &qpti_template,
1458         },
1459         {
1460                 .name = "SUNW,isp",
1461                 .data = &qpti_template,
1462         },
1463         {},
1464 };
1465 MODULE_DEVICE_TABLE(of, qpti_match);
1466
1467 static struct platform_driver qpti_sbus_driver = {
1468         .driver = {
1469                 .name = "qpti",
1470                 .owner = THIS_MODULE,
1471                 .of_match_table = qpti_match,
1472         },
1473         .probe          = qpti_sbus_probe,
1474         .remove         = __devexit_p(qpti_sbus_remove),
1475 };
1476
1477 static int __init qpti_init(void)
1478 {
1479         return platform_driver_register(&qpti_sbus_driver);
1480 }
1481
1482 static void __exit qpti_exit(void)
1483 {
1484         platform_driver_unregister(&qpti_sbus_driver);
1485 }
1486
1487 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1488 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1489 MODULE_LICENSE("GPL");
1490 MODULE_VERSION("2.1");
1491 MODULE_FIRMWARE("qlogic/isp1000.bin");
1492
1493 module_init(qpti_init);
1494 module_exit(qpti_exit);