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11#include <linux/kernel.h>
12#include <linux/types.h>
13#include <linux/module.h>
14#include <linux/fs.h>
15#include <linux/pci.h>
16#include <linux/interrupt.h>
17#include <linux/ioport.h>
18#include <linux/device.h>
19#include <linux/file.h>
20#include <linux/cdev.h>
21#include <linux/sched.h>
22#include <linux/spinlock.h>
23#include <linux/delay.h>
24#include <linux/uaccess.h>
25#include <linux/io.h>
26#include <linux/wait.h>
27#include <linux/poll.h>
28#include <linux/slab.h>
29#include "hpilo.h"
30
31static struct class *ilo_class;
32static unsigned int ilo_major;
33static unsigned int max_ccb = 16;
34static char ilo_hwdev[MAX_ILO_DEV];
35
36static inline int get_entry_id(int entry)
37{
38 return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR;
39}
40
41static inline int get_entry_len(int entry)
42{
43 return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3;
44}
45
46static inline int mk_entry(int id, int len)
47{
48 int qlen = len & 7 ? (len >> 3) + 1 : len >> 3;
49 return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS;
50}
51
52static inline int desc_mem_sz(int nr_entry)
53{
54 return nr_entry << L2_QENTRY_SZ;
55}
56
57
58
59
60
61
62
63
64
65
66
67static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry)
68{
69 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
70 unsigned long flags;
71 int ret = 0;
72
73 spin_lock_irqsave(&hw->fifo_lock, flags);
74 if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask]
75 & ENTRY_MASK_O)) {
76 fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |=
77 (entry & ENTRY_MASK_NOSTATE) | fifo_q->merge;
78 fifo_q->tail += 1;
79 ret = 1;
80 }
81 spin_unlock_irqrestore(&hw->fifo_lock, flags);
82
83 return ret;
84}
85
86static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry)
87{
88 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
89 unsigned long flags;
90 int ret = 0;
91 u64 c;
92
93 spin_lock_irqsave(&hw->fifo_lock, flags);
94 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
95 if (c & ENTRY_MASK_C) {
96 if (entry)
97 *entry = c & ENTRY_MASK_NOSTATE;
98
99 fifo_q->fifobar[fifo_q->head & fifo_q->imask] =
100 (c | ENTRY_MASK) + 1;
101 fifo_q->head += 1;
102 ret = 1;
103 }
104 spin_unlock_irqrestore(&hw->fifo_lock, flags);
105
106 return ret;
107}
108
109static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar)
110{
111 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
112 unsigned long flags;
113 int ret = 0;
114 u64 c;
115
116 spin_lock_irqsave(&hw->fifo_lock, flags);
117 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
118 if (c & ENTRY_MASK_C)
119 ret = 1;
120 spin_unlock_irqrestore(&hw->fifo_lock, flags);
121
122 return ret;
123}
124
125static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb,
126 int dir, int id, int len)
127{
128 char *fifobar;
129 int entry;
130
131 if (dir == SENDQ)
132 fifobar = ccb->ccb_u1.send_fifobar;
133 else
134 fifobar = ccb->ccb_u3.recv_fifobar;
135
136 entry = mk_entry(id, len);
137 return fifo_enqueue(hw, fifobar, entry);
138}
139
140static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb,
141 int dir, int *id, int *len, void **pkt)
142{
143 char *fifobar, *desc;
144 int entry = 0, pkt_id = 0;
145 int ret;
146
147 if (dir == SENDQ) {
148 fifobar = ccb->ccb_u1.send_fifobar;
149 desc = ccb->ccb_u2.send_desc;
150 } else {
151 fifobar = ccb->ccb_u3.recv_fifobar;
152 desc = ccb->ccb_u4.recv_desc;
153 }
154
155 ret = fifo_dequeue(hw, fifobar, &entry);
156 if (ret) {
157 pkt_id = get_entry_id(entry);
158 if (id)
159 *id = pkt_id;
160 if (len)
161 *len = get_entry_len(entry);
162 if (pkt)
163 *pkt = (void *)(desc + desc_mem_sz(pkt_id));
164 }
165
166 return ret;
167}
168
169static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb)
170{
171 char *fifobar = ccb->ccb_u3.recv_fifobar;
172
173 return fifo_check_recv(hw, fifobar);
174}
175
176static inline void doorbell_set(struct ccb *ccb)
177{
178 iowrite8(1, ccb->ccb_u5.db_base);
179}
180
181static inline void doorbell_clr(struct ccb *ccb)
182{
183 iowrite8(2, ccb->ccb_u5.db_base);
184}
185
186static inline int ctrl_set(int l2sz, int idxmask, int desclim)
187{
188 int active = 0, go = 1;
189 return l2sz << CTRL_BITPOS_L2SZ |
190 idxmask << CTRL_BITPOS_FIFOINDEXMASK |
191 desclim << CTRL_BITPOS_DESCLIMIT |
192 active << CTRL_BITPOS_A |
193 go << CTRL_BITPOS_G;
194}
195
196static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz)
197{
198
199 ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
200 ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
201}
202
203static inline int fifo_sz(int nr_entry)
204{
205
206 return (nr_entry * sizeof(u64)) + FIFOHANDLESIZE;
207}
208
209static void fifo_setup(void *base_addr, int nr_entry)
210{
211 struct fifo *fifo_q = base_addr;
212 int i;
213
214
215 fifo_q->head = 0;
216 fifo_q->tail = 0;
217 fifo_q->reset = 0;
218 fifo_q->nrents = nr_entry;
219 fifo_q->imask = nr_entry - 1;
220 fifo_q->merge = ENTRY_MASK_O;
221
222 for (i = 0; i < nr_entry; i++)
223 fifo_q->fifobar[i] = 0;
224}
225
226static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
227{
228 struct ccb *driver_ccb = &data->driver_ccb;
229 struct ccb __iomem *device_ccb = data->mapped_ccb;
230 int retries;
231
232
233 doorbell_clr(driver_ccb);
234 iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G),
235 &device_ccb->send_ctrl);
236 iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G),
237 &device_ccb->recv_ctrl);
238
239
240 for (retries = MAX_WAIT; retries > 0; retries--) {
241 doorbell_set(driver_ccb);
242 udelay(WAIT_TIME);
243 if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A))
244 &&
245 !(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A)))
246 break;
247 }
248 if (retries == 0)
249 dev_err(&pdev->dev, "Closing, but controller still active\n");
250
251
252 memset_io(device_ccb, 0, sizeof(struct ccb));
253
254
255 pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa);
256}
257
258static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
259{
260 char *dma_va;
261 dma_addr_t dma_pa;
262 struct ccb *driver_ccb, *ilo_ccb;
263
264 driver_ccb = &data->driver_ccb;
265 ilo_ccb = &data->ilo_ccb;
266
267 data->dma_size = 2 * fifo_sz(NR_QENTRY) +
268 2 * desc_mem_sz(NR_QENTRY) +
269 ILO_START_ALIGN + ILO_CACHE_SZ;
270
271 data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size,
272 &data->dma_pa);
273 if (!data->dma_va)
274 return -ENOMEM;
275
276 dma_va = (char *)data->dma_va;
277 dma_pa = data->dma_pa;
278
279 memset(dma_va, 0, data->dma_size);
280
281 dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN);
282 dma_pa = roundup(dma_pa, ILO_START_ALIGN);
283
284
285
286
287
288 ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ);
289 ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ);
290
291 fifo_setup(dma_va, NR_QENTRY);
292 driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE;
293 ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE;
294 dma_va += fifo_sz(NR_QENTRY);
295 dma_pa += fifo_sz(NR_QENTRY);
296
297 dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ);
298 dma_pa = roundup(dma_pa, ILO_CACHE_SZ);
299
300 fifo_setup(dma_va, NR_QENTRY);
301 driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE;
302 ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE;
303 dma_va += fifo_sz(NR_QENTRY);
304 dma_pa += fifo_sz(NR_QENTRY);
305
306 driver_ccb->ccb_u2.send_desc = dma_va;
307 ilo_ccb->ccb_u2.send_desc_pa = dma_pa;
308 dma_pa += desc_mem_sz(NR_QENTRY);
309 dma_va += desc_mem_sz(NR_QENTRY);
310
311 driver_ccb->ccb_u4.recv_desc = dma_va;
312 ilo_ccb->ccb_u4.recv_desc_pa = dma_pa;
313
314 driver_ccb->channel = slot;
315 ilo_ccb->channel = slot;
316
317 driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE);
318 ilo_ccb->ccb_u5.db_base = NULL;
319
320 return 0;
321}
322
323static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
324{
325 int pkt_id, pkt_sz;
326 struct ccb *driver_ccb = &data->driver_ccb;
327
328
329 data->mapped_ccb = (struct ccb __iomem *)
330 (hw->ram_vaddr + (slot * ILOHW_CCB_SZ));
331 memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb));
332
333
334 pkt_sz = 0;
335 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) {
336 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz);
337 doorbell_set(driver_ccb);
338 }
339
340 pkt_sz = desc_mem_sz(1);
341 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++)
342 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz);
343
344
345 doorbell_clr(driver_ccb);
346}
347
348static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data)
349{
350 int pkt_id, i;
351 struct ccb *driver_ccb = &data->driver_ccb;
352
353
354 for (i = MAX_WAIT; i > 0; i--) {
355 if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL))
356 break;
357 udelay(WAIT_TIME);
358 }
359
360 if (i == 0) {
361 dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n");
362 return -EBUSY;
363 }
364
365 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
366 doorbell_set(driver_ccb);
367 return 0;
368}
369
370static inline int is_channel_reset(struct ccb *ccb)
371{
372
373 return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset;
374}
375
376static inline void set_channel_reset(struct ccb *ccb)
377{
378
379 FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1;
380}
381
382static inline int get_device_outbound(struct ilo_hwinfo *hw)
383{
384 return ioread32(&hw->mmio_vaddr[DB_OUT]);
385}
386
387static inline int is_db_reset(int db_out)
388{
389 return db_out & (1 << DB_RESET);
390}
391
392static inline int is_device_reset(struct ilo_hwinfo *hw)
393{
394
395 return is_db_reset(get_device_outbound(hw));
396}
397
398static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr)
399{
400 iowrite32(clr, &hw->mmio_vaddr[DB_OUT]);
401}
402
403static inline void clear_device(struct ilo_hwinfo *hw)
404{
405
406 clear_pending_db(hw, -1);
407}
408
409static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw)
410{
411 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]);
412}
413
414static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw)
415{
416 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1,
417 &hw->mmio_vaddr[DB_IRQ]);
418}
419
420static void ilo_set_reset(struct ilo_hwinfo *hw)
421{
422 int slot;
423
424
425
426
427
428 for (slot = 0; slot < max_ccb; slot++) {
429 if (!hw->ccb_alloc[slot])
430 continue;
431 set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb);
432 }
433}
434
435static ssize_t ilo_read(struct file *fp, char __user *buf,
436 size_t len, loff_t *off)
437{
438 int err, found, cnt, pkt_id, pkt_len;
439 struct ccb_data *data = fp->private_data;
440 struct ccb *driver_ccb = &data->driver_ccb;
441 struct ilo_hwinfo *hw = data->ilo_hw;
442 void *pkt;
443
444 if (is_channel_reset(driver_ccb)) {
445
446
447
448
449 return -ENODEV;
450 }
451
452
453
454
455
456
457
458
459 cnt = 20;
460 do {
461
462 found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id,
463 &pkt_len, &pkt);
464 if (found)
465 break;
466 cnt--;
467 msleep(100);
468 } while (!found && cnt);
469
470 if (!found)
471 return -EAGAIN;
472
473
474 if (pkt_len < len)
475 len = pkt_len;
476
477 err = copy_to_user(buf, pkt, len);
478
479
480 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, desc_mem_sz(1));
481
482 return err ? -EFAULT : len;
483}
484
485static ssize_t ilo_write(struct file *fp, const char __user *buf,
486 size_t len, loff_t *off)
487{
488 int err, pkt_id, pkt_len;
489 struct ccb_data *data = fp->private_data;
490 struct ccb *driver_ccb = &data->driver_ccb;
491 struct ilo_hwinfo *hw = data->ilo_hw;
492 void *pkt;
493
494 if (is_channel_reset(driver_ccb))
495 return -ENODEV;
496
497
498 if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt))
499 return -EBUSY;
500
501
502 if (pkt_len < len)
503 len = pkt_len;
504
505
506 err = copy_from_user(pkt, buf, len);
507 if (err)
508 len = 0;
509
510
511 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, len);
512 doorbell_set(driver_ccb);
513
514 return err ? -EFAULT : len;
515}
516
517static unsigned int ilo_poll(struct file *fp, poll_table *wait)
518{
519 struct ccb_data *data = fp->private_data;
520 struct ccb *driver_ccb = &data->driver_ccb;
521
522 poll_wait(fp, &data->ccb_waitq, wait);
523
524 if (is_channel_reset(driver_ccb))
525 return POLLERR;
526 else if (ilo_pkt_recv(data->ilo_hw, driver_ccb))
527 return POLLIN | POLLRDNORM;
528
529 return 0;
530}
531
532static int ilo_close(struct inode *ip, struct file *fp)
533{
534 int slot;
535 struct ccb_data *data;
536 struct ilo_hwinfo *hw;
537 unsigned long flags;
538
539 slot = iminor(ip) % max_ccb;
540 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
541
542 spin_lock(&hw->open_lock);
543
544 if (hw->ccb_alloc[slot]->ccb_cnt == 1) {
545
546 data = fp->private_data;
547
548 spin_lock_irqsave(&hw->alloc_lock, flags);
549 hw->ccb_alloc[slot] = NULL;
550 spin_unlock_irqrestore(&hw->alloc_lock, flags);
551
552 ilo_ccb_close(hw->ilo_dev, data);
553
554 kfree(data);
555 } else
556 hw->ccb_alloc[slot]->ccb_cnt--;
557
558 spin_unlock(&hw->open_lock);
559
560 return 0;
561}
562
563static int ilo_open(struct inode *ip, struct file *fp)
564{
565 int slot, error;
566 struct ccb_data *data;
567 struct ilo_hwinfo *hw;
568 unsigned long flags;
569
570 slot = iminor(ip) % max_ccb;
571 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
572
573
574 data = kzalloc(sizeof(*data), GFP_KERNEL);
575 if (!data)
576 return -ENOMEM;
577
578 spin_lock(&hw->open_lock);
579
580
581 if (hw->ccb_alloc[slot] == NULL) {
582
583 error = ilo_ccb_setup(hw, data, slot);
584 if (error) {
585 kfree(data);
586 goto out;
587 }
588
589 data->ccb_cnt = 1;
590 data->ccb_excl = fp->f_flags & O_EXCL;
591 data->ilo_hw = hw;
592 init_waitqueue_head(&data->ccb_waitq);
593
594
595 spin_lock_irqsave(&hw->alloc_lock, flags);
596 ilo_ccb_open(hw, data, slot);
597 hw->ccb_alloc[slot] = data;
598 spin_unlock_irqrestore(&hw->alloc_lock, flags);
599
600
601 error = ilo_ccb_verify(hw, data);
602 if (error) {
603
604 spin_lock_irqsave(&hw->alloc_lock, flags);
605 hw->ccb_alloc[slot] = NULL;
606 spin_unlock_irqrestore(&hw->alloc_lock, flags);
607
608 ilo_ccb_close(hw->ilo_dev, data);
609
610 kfree(data);
611 goto out;
612 }
613
614 } else {
615 kfree(data);
616 if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) {
617
618
619
620
621
622 error = -EBUSY;
623 } else {
624 hw->ccb_alloc[slot]->ccb_cnt++;
625 error = 0;
626 }
627 }
628out:
629 spin_unlock(&hw->open_lock);
630
631 if (!error)
632 fp->private_data = hw->ccb_alloc[slot];
633
634 return error;
635}
636
637static const struct file_operations ilo_fops = {
638 .owner = THIS_MODULE,
639 .read = ilo_read,
640 .write = ilo_write,
641 .poll = ilo_poll,
642 .open = ilo_open,
643 .release = ilo_close,
644 .llseek = noop_llseek,
645};
646
647static irqreturn_t ilo_isr(int irq, void *data)
648{
649 struct ilo_hwinfo *hw = data;
650 int pending, i;
651
652 spin_lock(&hw->alloc_lock);
653
654
655 pending = get_device_outbound(hw);
656 if (!pending) {
657 spin_unlock(&hw->alloc_lock);
658 return IRQ_NONE;
659 }
660
661 if (is_db_reset(pending)) {
662
663 pending = -1;
664 ilo_set_reset(hw);
665 }
666
667 for (i = 0; i < max_ccb; i++) {
668 if (!hw->ccb_alloc[i])
669 continue;
670 if (pending & (1 << i))
671 wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq);
672 }
673
674
675 clear_pending_db(hw, pending);
676
677 spin_unlock(&hw->alloc_lock);
678
679 return IRQ_HANDLED;
680}
681
682static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
683{
684 pci_iounmap(pdev, hw->db_vaddr);
685 pci_iounmap(pdev, hw->ram_vaddr);
686 pci_iounmap(pdev, hw->mmio_vaddr);
687}
688
689static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
690{
691 int bar;
692 unsigned long off;
693
694
695 hw->mmio_vaddr = pci_iomap(pdev, 1, 0);
696 if (hw->mmio_vaddr == NULL) {
697 dev_err(&pdev->dev, "Error mapping mmio\n");
698 goto out;
699 }
700
701
702 if (pdev->subsystem_device == 0x00E4) {
703 bar = 5;
704
705 off = pci_resource_len(pdev, bar) - 0x2000;
706 } else {
707 bar = 2;
708 off = 0;
709 }
710 hw->ram_vaddr = pci_iomap_range(pdev, bar, off, max_ccb * ILOHW_CCB_SZ);
711 if (hw->ram_vaddr == NULL) {
712 dev_err(&pdev->dev, "Error mapping shared mem\n");
713 goto mmio_free;
714 }
715
716
717 hw->db_vaddr = pci_iomap(pdev, 3, max_ccb * ONE_DB_SIZE);
718 if (hw->db_vaddr == NULL) {
719 dev_err(&pdev->dev, "Error mapping doorbell\n");
720 goto ram_free;
721 }
722
723 return 0;
724ram_free:
725 pci_iounmap(pdev, hw->ram_vaddr);
726mmio_free:
727 pci_iounmap(pdev, hw->mmio_vaddr);
728out:
729 return -ENOMEM;
730}
731
732static void ilo_remove(struct pci_dev *pdev)
733{
734 int i, minor;
735 struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev);
736
737 if (!ilo_hw)
738 return;
739
740 clear_device(ilo_hw);
741
742 minor = MINOR(ilo_hw->cdev.dev);
743 for (i = minor; i < minor + max_ccb; i++)
744 device_destroy(ilo_class, MKDEV(ilo_major, i));
745
746 cdev_del(&ilo_hw->cdev);
747 ilo_disable_interrupts(ilo_hw);
748 free_irq(pdev->irq, ilo_hw);
749 ilo_unmap_device(pdev, ilo_hw);
750 pci_release_regions(pdev);
751
752
753
754
755
756
757
758
759 kfree(ilo_hw);
760 ilo_hwdev[(minor / max_ccb)] = 0;
761}
762
763static int ilo_probe(struct pci_dev *pdev,
764 const struct pci_device_id *ent)
765{
766 int devnum, minor, start, error = 0;
767 struct ilo_hwinfo *ilo_hw;
768
769
770 if (pdev->subsystem_device == 0x1979)
771 return 0;
772
773 if (max_ccb > MAX_CCB)
774 max_ccb = MAX_CCB;
775 else if (max_ccb < MIN_CCB)
776 max_ccb = MIN_CCB;
777
778
779 for (devnum = 0; devnum < MAX_ILO_DEV; devnum++) {
780 if (ilo_hwdev[devnum] == 0) {
781 ilo_hwdev[devnum] = 1;
782 break;
783 }
784 }
785
786 if (devnum == MAX_ILO_DEV) {
787 dev_err(&pdev->dev, "Error finding free device\n");
788 return -ENODEV;
789 }
790
791
792 error = -ENOMEM;
793 ilo_hw = kzalloc(sizeof(*ilo_hw), GFP_KERNEL);
794 if (!ilo_hw)
795 goto out;
796
797 ilo_hw->ilo_dev = pdev;
798 spin_lock_init(&ilo_hw->alloc_lock);
799 spin_lock_init(&ilo_hw->fifo_lock);
800 spin_lock_init(&ilo_hw->open_lock);
801
802 error = pci_enable_device(pdev);
803 if (error)
804 goto free;
805
806 pci_set_master(pdev);
807
808 error = pci_request_regions(pdev, ILO_NAME);
809 if (error)
810 goto disable;
811
812 error = ilo_map_device(pdev, ilo_hw);
813 if (error)
814 goto free_regions;
815
816 pci_set_drvdata(pdev, ilo_hw);
817 clear_device(ilo_hw);
818
819 error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw);
820 if (error)
821 goto unmap;
822
823 ilo_enable_interrupts(ilo_hw);
824
825 cdev_init(&ilo_hw->cdev, &ilo_fops);
826 ilo_hw->cdev.owner = THIS_MODULE;
827 start = devnum * max_ccb;
828 error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), max_ccb);
829 if (error) {
830 dev_err(&pdev->dev, "Could not add cdev\n");
831 goto remove_isr;
832 }
833
834 for (minor = 0 ; minor < max_ccb; minor++) {
835 struct device *dev;
836 dev = device_create(ilo_class, &pdev->dev,
837 MKDEV(ilo_major, minor), NULL,
838 "hpilo!d%dccb%d", devnum, minor);
839 if (IS_ERR(dev))
840 dev_err(&pdev->dev, "Could not create files\n");
841 }
842
843 return 0;
844remove_isr:
845 ilo_disable_interrupts(ilo_hw);
846 free_irq(pdev->irq, ilo_hw);
847unmap:
848 ilo_unmap_device(pdev, ilo_hw);
849free_regions:
850 pci_release_regions(pdev);
851disable:
852
853free:
854 kfree(ilo_hw);
855out:
856 ilo_hwdev[devnum] = 0;
857 return error;
858}
859
860static struct pci_device_id ilo_devices[] = {
861 { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) },
862 { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) },
863 { }
864};
865MODULE_DEVICE_TABLE(pci, ilo_devices);
866
867static struct pci_driver ilo_driver = {
868 .name = ILO_NAME,
869 .id_table = ilo_devices,
870 .probe = ilo_probe,
871 .remove = ilo_remove,
872};
873
874static int __init ilo_init(void)
875{
876 int error;
877 dev_t dev;
878
879 ilo_class = class_create(THIS_MODULE, "iLO");
880 if (IS_ERR(ilo_class)) {
881 error = PTR_ERR(ilo_class);
882 goto out;
883 }
884
885 error = alloc_chrdev_region(&dev, 0, MAX_OPEN, ILO_NAME);
886 if (error)
887 goto class_destroy;
888
889 ilo_major = MAJOR(dev);
890
891 error = pci_register_driver(&ilo_driver);
892 if (error)
893 goto chr_remove;
894
895 return 0;
896chr_remove:
897 unregister_chrdev_region(dev, MAX_OPEN);
898class_destroy:
899 class_destroy(ilo_class);
900out:
901 return error;
902}
903
904static void __exit ilo_exit(void)
905{
906 pci_unregister_driver(&ilo_driver);
907 unregister_chrdev_region(MKDEV(ilo_major, 0), MAX_OPEN);
908 class_destroy(ilo_class);
909}
910
911MODULE_VERSION("1.5.0");
912MODULE_ALIAS(ILO_NAME);
913MODULE_DESCRIPTION(ILO_NAME);
914MODULE_AUTHOR("David Altobelli <david.altobelli@hpe.com>");
915MODULE_LICENSE("GPL v2");
916
917module_param(max_ccb, uint, 0444);
918MODULE_PARM_DESC(max_ccb, "Maximum number of HP iLO channels to attach (8-24)(default=16)");
919
920module_init(ilo_init);
921module_exit(ilo_exit);
922