1 // SPDX-License-Identifier: GPL-2.0
3 * Driver for the HP iLO management processor.
5 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
6 * David Altobelli <david.altobelli@hpe.com>
8 #include <linux/kernel.h>
9 #include <linux/types.h>
10 #include <linux/module.h>
12 #include <linux/pci.h>
13 #include <linux/interrupt.h>
14 #include <linux/ioport.h>
15 #include <linux/device.h>
16 #include <linux/file.h>
17 #include <linux/cdev.h>
18 #include <linux/sched.h>
19 #include <linux/spinlock.h>
20 #include <linux/delay.h>
21 #include <linux/uaccess.h>
23 #include <linux/wait.h>
24 #include <linux/poll.h>
25 #include <linux/slab.h>
28 static const struct class ilo_class = {
31 static unsigned int ilo_major;
32 static unsigned int max_ccb = 16;
33 static char ilo_hwdev[MAX_ILO_DEV];
34 static const struct pci_device_id ilo_blacklist[] = {
36 {PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3307, PCI_VENDOR_ID_HP, 0x1979)},
38 {PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3307, PCI_VENDOR_ID_HP_3PAR, 0x0289)},
42 static inline int get_entry_id(int entry)
44 return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR;
47 static inline int get_entry_len(int entry)
49 return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3;
52 static inline int mk_entry(int id, int len)
54 int qlen = len & 7 ? (len >> 3) + 1 : len >> 3;
55 return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS;
58 static inline int desc_mem_sz(int nr_entry)
60 return nr_entry << L2_QENTRY_SZ;
64 * FIFO queues, shared with hardware.
66 * If a queue has empty slots, an entry is added to the queue tail,
67 * and that entry is marked as occupied.
68 * Entries can be dequeued from the head of the list, when the device
69 * has marked the entry as consumed.
71 * Returns true on successful queue/dequeue, false on failure.
73 static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry)
75 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
79 spin_lock_irqsave(&hw->fifo_lock, flags);
80 if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask]
82 fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |=
83 (entry & ENTRY_MASK_NOSTATE) | fifo_q->merge;
87 spin_unlock_irqrestore(&hw->fifo_lock, flags);
92 static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry)
94 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
99 spin_lock_irqsave(&hw->fifo_lock, flags);
100 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
101 if (c & ENTRY_MASK_C) {
103 *entry = c & ENTRY_MASK_NOSTATE;
105 fifo_q->fifobar[fifo_q->head & fifo_q->imask] =
106 (c | ENTRY_MASK) + 1;
110 spin_unlock_irqrestore(&hw->fifo_lock, flags);
115 static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar)
117 struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
122 spin_lock_irqsave(&hw->fifo_lock, flags);
123 c = fifo_q->fifobar[fifo_q->head & fifo_q->imask];
124 if (c & ENTRY_MASK_C)
126 spin_unlock_irqrestore(&hw->fifo_lock, flags);
131 static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb,
132 int dir, int id, int len)
138 fifobar = ccb->ccb_u1.send_fifobar;
140 fifobar = ccb->ccb_u3.recv_fifobar;
142 entry = mk_entry(id, len);
143 return fifo_enqueue(hw, fifobar, entry);
146 static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb,
147 int dir, int *id, int *len, void **pkt)
149 char *fifobar, *desc;
150 int entry = 0, pkt_id = 0;
154 fifobar = ccb->ccb_u1.send_fifobar;
155 desc = ccb->ccb_u2.send_desc;
157 fifobar = ccb->ccb_u3.recv_fifobar;
158 desc = ccb->ccb_u4.recv_desc;
161 ret = fifo_dequeue(hw, fifobar, &entry);
163 pkt_id = get_entry_id(entry);
167 *len = get_entry_len(entry);
169 *pkt = (void *)(desc + desc_mem_sz(pkt_id));
175 static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb)
177 char *fifobar = ccb->ccb_u3.recv_fifobar;
179 return fifo_check_recv(hw, fifobar);
182 static inline void doorbell_set(struct ccb *ccb)
184 iowrite8(1, ccb->ccb_u5.db_base);
187 static inline void doorbell_clr(struct ccb *ccb)
189 iowrite8(2, ccb->ccb_u5.db_base);
192 static inline int ctrl_set(int l2sz, int idxmask, int desclim)
194 int active = 0, go = 1;
195 return l2sz << CTRL_BITPOS_L2SZ |
196 idxmask << CTRL_BITPOS_FIFOINDEXMASK |
197 desclim << CTRL_BITPOS_DESCLIMIT |
198 active << CTRL_BITPOS_A |
202 static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz)
204 /* for simplicity, use the same parameters for send and recv ctrls */
205 ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
206 ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
209 static inline int fifo_sz(int nr_entry)
211 /* size of a fifo is determined by the number of entries it contains */
212 return nr_entry * sizeof(u64) + FIFOHANDLESIZE;
215 static void fifo_setup(void *base_addr, int nr_entry)
217 struct fifo *fifo_q = base_addr;
220 /* set up an empty fifo */
224 fifo_q->nrents = nr_entry;
225 fifo_q->imask = nr_entry - 1;
226 fifo_q->merge = ENTRY_MASK_O;
228 for (i = 0; i < nr_entry; i++)
229 fifo_q->fifobar[i] = 0;
232 static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
234 struct ccb *driver_ccb = &data->driver_ccb;
235 struct ccb __iomem *device_ccb = data->mapped_ccb;
238 /* complicated dance to tell the hw we are stopping */
239 doorbell_clr(driver_ccb);
240 iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G),
241 &device_ccb->send_ctrl);
242 iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G),
243 &device_ccb->recv_ctrl);
245 /* give iLO some time to process stop request */
246 for (retries = MAX_WAIT; retries > 0; retries--) {
247 doorbell_set(driver_ccb);
249 if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A))
251 !(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A)))
255 dev_err(&pdev->dev, "Closing, but controller still active\n");
257 /* clear the hw ccb */
258 memset_io(device_ccb, 0, sizeof(struct ccb));
260 /* free resources used to back send/recv queues */
261 dma_free_coherent(&pdev->dev, data->dma_size, data->dma_va,
265 static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
269 struct ccb *driver_ccb, *ilo_ccb;
271 driver_ccb = &data->driver_ccb;
272 ilo_ccb = &data->ilo_ccb;
274 data->dma_size = 2 * fifo_sz(NR_QENTRY) +
275 2 * desc_mem_sz(NR_QENTRY) +
276 ILO_START_ALIGN + ILO_CACHE_SZ;
278 data->dma_va = dma_alloc_coherent(&hw->ilo_dev->dev, data->dma_size,
279 &data->dma_pa, GFP_ATOMIC);
283 dma_va = (char *)data->dma_va;
284 dma_pa = data->dma_pa;
286 dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN);
287 dma_pa = roundup(dma_pa, ILO_START_ALIGN);
290 * Create two ccb's, one with virt addrs, one with phys addrs.
291 * Copy the phys addr ccb to device shared mem.
293 ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ);
294 ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ);
296 fifo_setup(dma_va, NR_QENTRY);
297 driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE;
298 ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE;
299 dma_va += fifo_sz(NR_QENTRY);
300 dma_pa += fifo_sz(NR_QENTRY);
302 dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ);
303 dma_pa = roundup(dma_pa, ILO_CACHE_SZ);
305 fifo_setup(dma_va, NR_QENTRY);
306 driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE;
307 ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE;
308 dma_va += fifo_sz(NR_QENTRY);
309 dma_pa += fifo_sz(NR_QENTRY);
311 driver_ccb->ccb_u2.send_desc = dma_va;
312 ilo_ccb->ccb_u2.send_desc_pa = dma_pa;
313 dma_pa += desc_mem_sz(NR_QENTRY);
314 dma_va += desc_mem_sz(NR_QENTRY);
316 driver_ccb->ccb_u4.recv_desc = dma_va;
317 ilo_ccb->ccb_u4.recv_desc_pa = dma_pa;
319 driver_ccb->channel = slot;
320 ilo_ccb->channel = slot;
322 driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE);
323 ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */
328 static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
331 struct ccb *driver_ccb = &data->driver_ccb;
333 /* copy the ccb with physical addrs to device memory */
334 data->mapped_ccb = (struct ccb __iomem *)
335 (hw->ram_vaddr + (slot * ILOHW_CCB_SZ));
336 memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb));
338 /* put packets on the send and receive queues */
340 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) {
341 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz);
342 doorbell_set(driver_ccb);
345 pkt_sz = desc_mem_sz(1);
346 for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++)
347 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz);
349 /* the ccb is ready to use */
350 doorbell_clr(driver_ccb);
353 static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data)
356 struct ccb *driver_ccb = &data->driver_ccb;
358 /* make sure iLO is really handling requests */
359 for (i = MAX_WAIT; i > 0; i--) {
360 if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL))
366 dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n");
370 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
371 doorbell_set(driver_ccb);
375 static inline int is_channel_reset(struct ccb *ccb)
377 /* check for this particular channel needing a reset */
378 return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset;
381 static inline void set_channel_reset(struct ccb *ccb)
383 /* set a flag indicating this channel needs a reset */
384 FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1;
387 static inline int get_device_outbound(struct ilo_hwinfo *hw)
389 return ioread32(&hw->mmio_vaddr[DB_OUT]);
392 static inline int is_db_reset(int db_out)
394 return db_out & (1 << DB_RESET);
397 static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr)
399 iowrite32(clr, &hw->mmio_vaddr[DB_OUT]);
402 static inline void clear_device(struct ilo_hwinfo *hw)
404 /* clear the device (reset bits, pending channel entries) */
405 clear_pending_db(hw, -1);
408 static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw)
410 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]);
413 static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw)
415 iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1,
416 &hw->mmio_vaddr[DB_IRQ]);
419 static void ilo_set_reset(struct ilo_hwinfo *hw)
424 * Mapped memory is zeroed on ilo reset, so set a per ccb flag
425 * to indicate that this ccb needs to be closed and reopened.
427 for (slot = 0; slot < max_ccb; slot++) {
428 if (!hw->ccb_alloc[slot])
430 set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb);
434 static ssize_t ilo_read(struct file *fp, char __user *buf,
435 size_t len, loff_t *off)
437 int err, found, cnt, pkt_id, pkt_len;
438 struct ccb_data *data = fp->private_data;
439 struct ccb *driver_ccb = &data->driver_ccb;
440 struct ilo_hwinfo *hw = data->ilo_hw;
443 if (is_channel_reset(driver_ccb)) {
445 * If the device has been reset, applications
446 * need to close and reopen all ccbs.
452 * This function is to be called when data is expected
453 * in the channel, and will return an error if no packet is found
454 * during the loop below. The sleep/retry logic is to allow
455 * applications to call read() immediately post write(),
456 * and give iLO some time to process the sent packet.
460 /* look for a received packet */
461 found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id,
467 } while (!found && cnt);
472 /* only copy the length of the received packet */
476 err = copy_to_user(buf, pkt, len);
478 /* return the received packet to the queue */
479 ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, desc_mem_sz(1));
481 return err ? -EFAULT : len;
484 static ssize_t ilo_write(struct file *fp, const char __user *buf,
485 size_t len, loff_t *off)
487 int err, pkt_id, pkt_len;
488 struct ccb_data *data = fp->private_data;
489 struct ccb *driver_ccb = &data->driver_ccb;
490 struct ilo_hwinfo *hw = data->ilo_hw;
493 if (is_channel_reset(driver_ccb))
496 /* get a packet to send the user command */
497 if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt))
500 /* limit the length to the length of the packet */
504 /* on failure, set the len to 0 to return empty packet to the device */
505 err = copy_from_user(pkt, buf, len);
509 /* send the packet */
510 ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, len);
511 doorbell_set(driver_ccb);
513 return err ? -EFAULT : len;
516 static __poll_t ilo_poll(struct file *fp, poll_table *wait)
518 struct ccb_data *data = fp->private_data;
519 struct ccb *driver_ccb = &data->driver_ccb;
521 poll_wait(fp, &data->ccb_waitq, wait);
523 if (is_channel_reset(driver_ccb))
525 else if (ilo_pkt_recv(data->ilo_hw, driver_ccb))
526 return EPOLLIN | EPOLLRDNORM;
531 static int ilo_close(struct inode *ip, struct file *fp)
534 struct ccb_data *data;
535 struct ilo_hwinfo *hw;
538 slot = iminor(ip) % max_ccb;
539 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
541 spin_lock(&hw->open_lock);
543 if (hw->ccb_alloc[slot]->ccb_cnt == 1) {
545 data = fp->private_data;
547 spin_lock_irqsave(&hw->alloc_lock, flags);
548 hw->ccb_alloc[slot] = NULL;
549 spin_unlock_irqrestore(&hw->alloc_lock, flags);
551 ilo_ccb_close(hw->ilo_dev, data);
555 hw->ccb_alloc[slot]->ccb_cnt--;
557 spin_unlock(&hw->open_lock);
562 static int ilo_open(struct inode *ip, struct file *fp)
565 struct ccb_data *data;
566 struct ilo_hwinfo *hw;
569 slot = iminor(ip) % max_ccb;
570 hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
572 /* new ccb allocation */
573 data = kzalloc(sizeof(*data), GFP_KERNEL);
577 spin_lock(&hw->open_lock);
579 /* each fd private_data holds sw/hw view of ccb */
580 if (hw->ccb_alloc[slot] == NULL) {
581 /* create a channel control block for this minor */
582 error = ilo_ccb_setup(hw, data, slot);
589 data->ccb_excl = fp->f_flags & O_EXCL;
591 init_waitqueue_head(&data->ccb_waitq);
593 /* write the ccb to hw */
594 spin_lock_irqsave(&hw->alloc_lock, flags);
595 ilo_ccb_open(hw, data, slot);
596 hw->ccb_alloc[slot] = data;
597 spin_unlock_irqrestore(&hw->alloc_lock, flags);
599 /* make sure the channel is functional */
600 error = ilo_ccb_verify(hw, data);
603 spin_lock_irqsave(&hw->alloc_lock, flags);
604 hw->ccb_alloc[slot] = NULL;
605 spin_unlock_irqrestore(&hw->alloc_lock, flags);
607 ilo_ccb_close(hw->ilo_dev, data);
615 if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) {
617 * The channel exists, and either this open
618 * or a previous open of this channel wants
623 hw->ccb_alloc[slot]->ccb_cnt++;
628 spin_unlock(&hw->open_lock);
631 fp->private_data = hw->ccb_alloc[slot];
636 static const struct file_operations ilo_fops = {
637 .owner = THIS_MODULE,
642 .release = ilo_close,
643 .llseek = noop_llseek,
646 static irqreturn_t ilo_isr(int irq, void *data)
648 struct ilo_hwinfo *hw = data;
651 spin_lock(&hw->alloc_lock);
653 /* check for ccbs which have data */
654 pending = get_device_outbound(hw);
656 spin_unlock(&hw->alloc_lock);
660 if (is_db_reset(pending)) {
661 /* wake up all ccbs if the device was reset */
666 for (i = 0; i < max_ccb; i++) {
667 if (!hw->ccb_alloc[i])
669 if (pending & (1 << i))
670 wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq);
673 /* clear the device of the channels that have been handled */
674 clear_pending_db(hw, pending);
676 spin_unlock(&hw->alloc_lock);
681 static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
683 pci_iounmap(pdev, hw->db_vaddr);
684 pci_iounmap(pdev, hw->ram_vaddr);
685 pci_iounmap(pdev, hw->mmio_vaddr);
688 static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw)
695 /* map the memory mapped i/o registers */
696 hw->mmio_vaddr = pci_iomap(pdev, 1, 0);
697 if (hw->mmio_vaddr == NULL) {
698 dev_err(&pdev->dev, "Error mapping mmio\n");
702 /* map the adapter shared memory region */
703 rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &pci_rev_id);
705 dev_err(&pdev->dev, "Error reading PCI rev id: %d\n", rc);
709 if (pci_rev_id >= PCI_REV_ID_NECHES) {
711 /* Last 8k is reserved for CCBs */
712 off = pci_resource_len(pdev, bar) - 0x2000;
717 hw->ram_vaddr = pci_iomap_range(pdev, bar, off, max_ccb * ILOHW_CCB_SZ);
718 if (hw->ram_vaddr == NULL) {
719 dev_err(&pdev->dev, "Error mapping shared mem\n");
723 /* map the doorbell aperture */
724 hw->db_vaddr = pci_iomap(pdev, 3, max_ccb * ONE_DB_SIZE);
725 if (hw->db_vaddr == NULL) {
726 dev_err(&pdev->dev, "Error mapping doorbell\n");
732 pci_iounmap(pdev, hw->ram_vaddr);
734 pci_iounmap(pdev, hw->mmio_vaddr);
739 static void ilo_remove(struct pci_dev *pdev)
742 struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev);
747 clear_device(ilo_hw);
749 minor = MINOR(ilo_hw->cdev.dev);
750 for (i = minor; i < minor + max_ccb; i++)
751 device_destroy(&ilo_class, MKDEV(ilo_major, i));
753 cdev_del(&ilo_hw->cdev);
754 ilo_disable_interrupts(ilo_hw);
755 free_irq(pdev->irq, ilo_hw);
756 ilo_unmap_device(pdev, ilo_hw);
757 pci_release_regions(pdev);
759 * pci_disable_device(pdev) used to be here. But this PCI device has
760 * two functions with interrupt lines connected to a single pin. The
761 * other one is a USB host controller. So when we disable the PIN here
762 * e.g. by rmmod hpilo, the controller stops working. It is because
763 * the interrupt link is disabled in ACPI since it is not refcounted
764 * yet. See acpi_pci_link_free_irq called from acpi_pci_irq_disable.
767 ilo_hwdev[(minor / max_ccb)] = 0;
770 static int ilo_probe(struct pci_dev *pdev,
771 const struct pci_device_id *ent)
773 int devnum, minor, start, error = 0;
774 struct ilo_hwinfo *ilo_hw;
776 if (pci_match_id(ilo_blacklist, pdev)) {
777 dev_dbg(&pdev->dev, "Not supported on this device\n");
781 if (max_ccb > MAX_CCB)
783 else if (max_ccb < MIN_CCB)
786 /* find a free range for device files */
787 for (devnum = 0; devnum < MAX_ILO_DEV; devnum++) {
788 if (ilo_hwdev[devnum] == 0) {
789 ilo_hwdev[devnum] = 1;
794 if (devnum == MAX_ILO_DEV) {
795 dev_err(&pdev->dev, "Error finding free device\n");
799 /* track global allocations for this device */
801 ilo_hw = kzalloc(sizeof(*ilo_hw), GFP_KERNEL);
805 ilo_hw->ilo_dev = pdev;
806 spin_lock_init(&ilo_hw->alloc_lock);
807 spin_lock_init(&ilo_hw->fifo_lock);
808 spin_lock_init(&ilo_hw->open_lock);
810 error = pci_enable_device(pdev);
814 pci_set_master(pdev);
816 error = pci_request_regions(pdev, ILO_NAME);
820 error = ilo_map_device(pdev, ilo_hw);
824 pci_set_drvdata(pdev, ilo_hw);
825 clear_device(ilo_hw);
827 error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw);
831 ilo_enable_interrupts(ilo_hw);
833 cdev_init(&ilo_hw->cdev, &ilo_fops);
834 ilo_hw->cdev.owner = THIS_MODULE;
835 start = devnum * max_ccb;
836 error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), max_ccb);
838 dev_err(&pdev->dev, "Could not add cdev\n");
842 for (minor = 0 ; minor < max_ccb; minor++) {
844 dev = device_create(&ilo_class, &pdev->dev,
845 MKDEV(ilo_major, minor), NULL,
846 "hpilo!d%dccb%d", devnum, minor);
848 dev_err(&pdev->dev, "Could not create files\n");
853 ilo_disable_interrupts(ilo_hw);
854 free_irq(pdev->irq, ilo_hw);
856 ilo_unmap_device(pdev, ilo_hw);
858 pci_release_regions(pdev);
860 /* pci_disable_device(pdev); see comment in ilo_remove */
864 ilo_hwdev[devnum] = 0;
868 static const struct pci_device_id ilo_devices[] = {
869 { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) },
870 { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) },
873 MODULE_DEVICE_TABLE(pci, ilo_devices);
875 static struct pci_driver ilo_driver = {
877 .id_table = ilo_devices,
879 .remove = ilo_remove,
882 static int __init ilo_init(void)
887 error = class_register(&ilo_class);
891 error = alloc_chrdev_region(&dev, 0, MAX_OPEN, ILO_NAME);
895 ilo_major = MAJOR(dev);
897 error = pci_register_driver(&ilo_driver);
903 unregister_chrdev_region(dev, MAX_OPEN);
905 class_unregister(&ilo_class);
910 static void __exit ilo_exit(void)
912 pci_unregister_driver(&ilo_driver);
913 unregister_chrdev_region(MKDEV(ilo_major, 0), MAX_OPEN);
914 class_unregister(&ilo_class);
917 MODULE_VERSION("1.5.0");
918 MODULE_ALIAS(ILO_NAME);
919 MODULE_DESCRIPTION(ILO_NAME);
920 MODULE_AUTHOR("David Altobelli <david.altobelli@hpe.com>");
921 MODULE_LICENSE("GPL v2");
923 module_param(max_ccb, uint, 0444);
924 MODULE_PARM_DESC(max_ccb, "Maximum number of HP iLO channels to attach (8-24)(default=16)");
926 module_init(ilo_init);
927 module_exit(ilo_exit);