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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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static const struct class ilo_class = { .name = "iLO",};static unsigned int ilo_major;static unsigned int max_ccb = 16;static char ilo_hwdev[MAX_ILO_DEV];static const struct pci_device_id ilo_blacklist[] = { /* auxiliary iLO */ {PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3307, PCI_VENDOR_ID_HP, 0x1979)}, /* CL */ {PCI_DEVICE_SUB(PCI_VENDOR_ID_HP, 0x3307, PCI_VENDOR_ID_HP_3PAR, 0x0289)}, {}};
static inline int get_entry_id(int entry){ return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR;}
static inline int get_entry_len(int entry){ return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3;}
static inline int mk_entry(int id, int len){ int qlen = len & 7 ? (len >> 3) + 1 : len >> 3; return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS;}
static inline int desc_mem_sz(int nr_entry){ return nr_entry << L2_QENTRY_SZ;}
/* * FIFO queues, shared with hardware. * * If a queue has empty slots, an entry is added to the queue tail, * and that entry is marked as occupied. * Entries can be dequeued from the head of the list, when the device * has marked the entry as consumed. * * Returns true on successful queue/dequeue, false on failure. */static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry){ struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); unsigned long flags; int ret = 0;
spin_lock_irqsave(&hw->fifo_lock, flags); if (!(fifo_q->fifobar[(fifo_q->tail + 1) & fifo_q->imask] & ENTRY_MASK_O)) { fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |= (entry & ENTRY_MASK_NOSTATE) | fifo_q->merge; fifo_q->tail += 1; ret = 1; } spin_unlock_irqrestore(&hw->fifo_lock, flags);
return ret;}
static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry){ struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); unsigned long flags; int ret = 0; u64 c;
spin_lock_irqsave(&hw->fifo_lock, flags); c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; if (c & ENTRY_MASK_C) { if (entry) *entry = c & ENTRY_MASK_NOSTATE;
fifo_q->fifobar[fifo_q->head & fifo_q->imask] = (c | ENTRY_MASK) + 1; fifo_q->head += 1; ret = 1; } spin_unlock_irqrestore(&hw->fifo_lock, flags);
return ret;}
static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar){ struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); unsigned long flags; int ret = 0; u64 c;
spin_lock_irqsave(&hw->fifo_lock, flags); c = fifo_q->fifobar[fifo_q->head & fifo_q->imask]; if (c & ENTRY_MASK_C) ret = 1; spin_unlock_irqrestore(&hw->fifo_lock, flags);
return ret;}
static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb, int dir, int id, int len){ char *fifobar; int entry;
if (dir == SENDQ) fifobar = ccb->ccb_u1.send_fifobar; else fifobar = ccb->ccb_u3.recv_fifobar;
entry = mk_entry(id, len); return fifo_enqueue(hw, fifobar, entry);}
static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb, int dir, int *id, int *len, void **pkt){ char *fifobar, *desc; int entry = 0, pkt_id = 0; int ret;
if (dir == SENDQ) { fifobar = ccb->ccb_u1.send_fifobar; desc = ccb->ccb_u2.send_desc; } else { fifobar = ccb->ccb_u3.recv_fifobar; desc = ccb->ccb_u4.recv_desc; }
ret = fifo_dequeue(hw, fifobar, &entry); if (ret) { pkt_id = get_entry_id(entry); if (id) *id = pkt_id; if (len) *len = get_entry_len(entry); if (pkt) *pkt = (void *)(desc + desc_mem_sz(pkt_id)); }
return ret;}
static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb){ char *fifobar = ccb->ccb_u3.recv_fifobar;
return fifo_check_recv(hw, fifobar);}
static inline void doorbell_set(struct ccb *ccb){ iowrite8(1, ccb->ccb_u5.db_base);}
static inline void doorbell_clr(struct ccb *ccb){ iowrite8(2, ccb->ccb_u5.db_base);}
static inline int ctrl_set(int l2sz, int idxmask, int desclim){ int active = 0, go = 1; return l2sz << CTRL_BITPOS_L2SZ | idxmask << CTRL_BITPOS_FIFOINDEXMASK | desclim << CTRL_BITPOS_DESCLIMIT | active << CTRL_BITPOS_A | go << CTRL_BITPOS_G;}
static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz){ /* for simplicity, use the same parameters for send and recv ctrls */ ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1); ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);}
static inline int fifo_sz(int nr_entry){ /* size of a fifo is determined by the number of entries it contains */ return nr_entry * sizeof(u64) + FIFOHANDLESIZE;}
static void fifo_setup(void *base_addr, int nr_entry){ struct fifo *fifo_q = base_addr; int i;
/* set up an empty fifo */ fifo_q->head = 0; fifo_q->tail = 0; fifo_q->reset = 0; fifo_q->nrents = nr_entry; fifo_q->imask = nr_entry - 1; fifo_q->merge = ENTRY_MASK_O;
for (i = 0; i < nr_entry; i++) fifo_q->fifobar[i] = 0;}
static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data){ struct ccb *driver_ccb = &data->driver_ccb; struct ccb __iomem *device_ccb = data->mapped_ccb; int retries;
/* complicated dance to tell the hw we are stopping */ doorbell_clr(driver_ccb); iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G), &device_ccb->send_ctrl); iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G), &device_ccb->recv_ctrl);
/* give iLO some time to process stop request */ for (retries = MAX_WAIT; retries > 0; retries--) { doorbell_set(driver_ccb); udelay(WAIT_TIME); if (!(ioread32(&device_ccb->send_ctrl) & (1 << CTRL_BITPOS_A)) && !(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A))) break; } if (retries == 0) dev_err(&pdev->dev, "Closing, but controller still active\n");
/* clear the hw ccb */ memset_io(device_ccb, 0, sizeof(struct ccb));
/* free resources used to back send/recv queues */ dma_free_coherent(&pdev->dev, data->dma_size, data->dma_va, data->dma_pa);}
static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot){ char *dma_va; dma_addr_t dma_pa; struct ccb *driver_ccb, *ilo_ccb;
driver_ccb = &data->driver_ccb; ilo_ccb = &data->ilo_ccb;
data->dma_size = 2 * fifo_sz(NR_QENTRY) + 2 * desc_mem_sz(NR_QENTRY) + ILO_START_ALIGN + ILO_CACHE_SZ;
data->dma_va = dma_alloc_coherent(&hw->ilo_dev->dev, data->dma_size, &data->dma_pa, GFP_ATOMIC); if (!data->dma_va) return -ENOMEM;
dma_va = (char *)data->dma_va; dma_pa = data->dma_pa;
dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN); dma_pa = roundup(dma_pa, ILO_START_ALIGN);
/* * Create two ccb's, one with virt addrs, one with phys addrs. * Copy the phys addr ccb to device shared mem. */ ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ); ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ);
fifo_setup(dma_va, NR_QENTRY); driver_ccb->ccb_u1.send_fifobar = dma_va + FIFOHANDLESIZE; ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE; dma_va += fifo_sz(NR_QENTRY); dma_pa += fifo_sz(NR_QENTRY);
dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ); dma_pa = roundup(dma_pa, ILO_CACHE_SZ);
fifo_setup(dma_va, NR_QENTRY); driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE; ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE; dma_va += fifo_sz(NR_QENTRY); dma_pa += fifo_sz(NR_QENTRY);
driver_ccb->ccb_u2.send_desc = dma_va; ilo_ccb->ccb_u2.send_desc_pa = dma_pa; dma_pa += desc_mem_sz(NR_QENTRY); dma_va += desc_mem_sz(NR_QENTRY);
driver_ccb->ccb_u4.recv_desc = dma_va; ilo_ccb->ccb_u4.recv_desc_pa = dma_pa;
driver_ccb->channel = slot; ilo_ccb->channel = slot;
driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE); ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */
return 0;}
static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot){ int pkt_id, pkt_sz; struct ccb *driver_ccb = &data->driver_ccb;
/* copy the ccb with physical addrs to device memory */ data->mapped_ccb = (struct ccb __iomem *) (hw->ram_vaddr + (slot * ILOHW_CCB_SZ)); memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb));
/* put packets on the send and receive queues */ pkt_sz = 0; for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) { ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz); doorbell_set(driver_ccb); }
pkt_sz = desc_mem_sz(1); for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, pkt_sz);
/* the ccb is ready to use */ doorbell_clr(driver_ccb);}
static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data){ int pkt_id, i; struct ccb *driver_ccb = &data->driver_ccb;
/* make sure iLO is really handling requests */ for (i = MAX_WAIT; i > 0; i--) { if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL)) break; udelay(WAIT_TIME); }
if (i == 0) { dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n"); return -EBUSY; }
ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0); doorbell_set(driver_ccb); return 0;}
static inline int is_channel_reset(struct ccb *ccb){ /* check for this particular channel needing a reset */ return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset;}
static inline void set_channel_reset(struct ccb *ccb){ /* set a flag indicating this channel needs a reset */ FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1;}
static inline int get_device_outbound(struct ilo_hwinfo *hw){ return ioread32(&hw->mmio_vaddr[DB_OUT]);}
static inline int is_db_reset(int db_out){ return db_out & (1 << DB_RESET);}
static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr){ iowrite32(clr, &hw->mmio_vaddr[DB_OUT]);}
static inline void clear_device(struct ilo_hwinfo *hw){ /* clear the device (reset bits, pending channel entries) */ clear_pending_db(hw, -1);}
static inline void ilo_enable_interrupts(struct ilo_hwinfo *hw){ iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]);}
static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw){ iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1, &hw->mmio_vaddr[DB_IRQ]);}
static void ilo_set_reset(struct ilo_hwinfo *hw){ int slot;
/* * Mapped memory is zeroed on ilo reset, so set a per ccb flag * to indicate that this ccb needs to be closed and reopened. */ for (slot = 0; slot < max_ccb; slot++) { if (!hw->ccb_alloc[slot]) continue; set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb); }}
static ssize_t ilo_read(struct file *fp, char __user *buf, size_t len, loff_t *off){ int err, found, cnt, pkt_id, pkt_len; struct ccb_data *data = fp->private_data; struct ccb *driver_ccb = &data->driver_ccb; struct ilo_hwinfo *hw = data->ilo_hw; void *pkt;
if (is_channel_reset(driver_ccb)) { /* * If the device has been reset, applications * need to close and reopen all ccbs. */ return -ENODEV; }
/* * This function is to be called when data is expected * in the channel, and will return an error if no packet is found * during the loop below. The sleep/retry logic is to allow * applications to call read() immediately post write(), * and give iLO some time to process the sent packet. */ cnt = 20; do { /* look for a received packet */ found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id, &pkt_len, &pkt); if (found) break; cnt--; msleep(100); } while (!found && cnt);
if (!found) return -EAGAIN;
/* only copy the length of the received packet */ if (pkt_len < len) len = pkt_len;
err = copy_to_user(buf, pkt, len);
/* return the received packet to the queue */ ilo_pkt_enqueue(hw, driver_ccb, RECVQ, pkt_id, desc_mem_sz(1));
return err ? -EFAULT : len;}
static ssize_t ilo_write(struct file *fp, const char __user *buf, size_t len, loff_t *off){ int err, pkt_id, pkt_len; struct ccb_data *data = fp->private_data; struct ccb *driver_ccb = &data->driver_ccb; struct ilo_hwinfo *hw = data->ilo_hw; void *pkt;
if (is_channel_reset(driver_ccb)) return -ENODEV;
/* get a packet to send the user command */ if (!ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, &pkt_len, &pkt)) return -EBUSY;
/* limit the length to the length of the packet */ if (pkt_len < len) len = pkt_len;
/* on failure, set the len to 0 to return empty packet to the device */ err = copy_from_user(pkt, buf, len); if (err) len = 0;
/* send the packet */ ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, len); doorbell_set(driver_ccb);
return err ? -EFAULT : len;}
static __poll_t ilo_poll(struct file *fp, poll_table *wait){ struct ccb_data *data = fp->private_data; struct ccb *driver_ccb = &data->driver_ccb;
poll_wait(fp, &data->ccb_waitq, wait);
if (is_channel_reset(driver_ccb)) return EPOLLERR; else if (ilo_pkt_recv(data->ilo_hw, driver_ccb)) return EPOLLIN | EPOLLRDNORM;
return 0;}
static int ilo_close(struct inode *ip, struct file *fp){ int slot; struct ccb_data *data; struct ilo_hwinfo *hw; unsigned long flags;
slot = iminor(ip) % max_ccb; hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
spin_lock(&hw->open_lock);
if (hw->ccb_alloc[slot]->ccb_cnt == 1) {
data = fp->private_data;
spin_lock_irqsave(&hw->alloc_lock, flags); hw->ccb_alloc[slot] = NULL; spin_unlock_irqrestore(&hw->alloc_lock, flags);
ilo_ccb_close(hw->ilo_dev, data);
kfree(data); } else hw->ccb_alloc[slot]->ccb_cnt--;
spin_unlock(&hw->open_lock);
return 0;}
static int ilo_open(struct inode *ip, struct file *fp){ int slot, error; struct ccb_data *data; struct ilo_hwinfo *hw; unsigned long flags;
slot = iminor(ip) % max_ccb; hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev);
/* new ccb allocation */ data = kzalloc_obj(*data); if (!data) return -ENOMEM;
spin_lock(&hw->open_lock);
/* each fd private_data holds sw/hw view of ccb */ if (hw->ccb_alloc[slot] == NULL) { /* create a channel control block for this minor */ error = ilo_ccb_setup(hw, data, slot); if (error) { kfree(data); goto out; }
data->ccb_cnt = 1; data->ccb_excl = fp->f_flags & O_EXCL; data->ilo_hw = hw; init_waitqueue_head(&data->ccb_waitq);
/* write the ccb to hw */ spin_lock_irqsave(&hw->alloc_lock, flags); ilo_ccb_open(hw, data, slot); hw->ccb_alloc[slot] = data; spin_unlock_irqrestore(&hw->alloc_lock, flags);
/* make sure the channel is functional */ error = ilo_ccb_verify(hw, data); if (error) {
spin_lock_irqsave(&hw->alloc_lock, flags); hw->ccb_alloc[slot] = NULL; spin_unlock_irqrestore(&hw->alloc_lock, flags);
ilo_ccb_close(hw->ilo_dev, data);
kfree(data); goto out; }
} else { kfree(data); if (fp->f_flags & O_EXCL || hw->ccb_alloc[slot]->ccb_excl) { /* * The channel exists, and either this open * or a previous open of this channel wants * exclusive access. */ error = -EBUSY; } else { hw->ccb_alloc[slot]->ccb_cnt++; error = 0; } }out: spin_unlock(&hw->open_lock);
if (!error) fp->private_data = hw->ccb_alloc[slot];
return error;}
static const struct file_operations ilo_fops = { .owner = THIS_MODULE, .read = ilo_read, .write = ilo_write, .poll = ilo_poll, .open = ilo_open, .release = ilo_close, .llseek = noop_llseek,};
static irqreturn_t ilo_isr(int irq, void *data){ struct ilo_hwinfo *hw = data; int pending, i;
spin_lock(&hw->alloc_lock);
/* check for ccbs which have data */ pending = get_device_outbound(hw); if (!pending) { spin_unlock(&hw->alloc_lock); return IRQ_NONE; }
if (is_db_reset(pending)) { /* wake up all ccbs if the device was reset */ pending = -1; ilo_set_reset(hw); }
for (i = 0; i < max_ccb; i++) { if (!hw->ccb_alloc[i]) continue; if (pending & (1 << i)) wake_up_interruptible(&hw->ccb_alloc[i]->ccb_waitq); }
/* clear the device of the channels that have been handled */ clear_pending_db(hw, pending);
spin_unlock(&hw->alloc_lock);
return IRQ_HANDLED;}
static void ilo_unmap_device(struct pci_dev *pdev, struct ilo_hwinfo *hw){ pci_iounmap(pdev, hw->db_vaddr); pci_iounmap(pdev, hw->ram_vaddr); pci_iounmap(pdev, hw->mmio_vaddr);}
static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw){ int bar; unsigned long off; u8 pci_rev_id; int rc;
/* map the memory mapped i/o registers */ hw->mmio_vaddr = pci_iomap(pdev, 1, 0); if (hw->mmio_vaddr == NULL) { dev_err(&pdev->dev, "Error mapping mmio\n"); goto out; }
/* map the adapter shared memory region */ rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &pci_rev_id); if (rc != 0) { dev_err(&pdev->dev, "Error reading PCI rev id: %d\n", rc); goto out; }
if (pci_rev_id >= PCI_REV_ID_NECHES) { bar = 5; /* Last 8k is reserved for CCBs */ off = pci_resource_len(pdev, bar) - 0x2000; } else { bar = 2; off = 0; } hw->ram_vaddr = pci_iomap_range(pdev, bar, off, max_ccb * ILOHW_CCB_SZ); if (hw->ram_vaddr == NULL) { dev_err(&pdev->dev, "Error mapping shared mem\n"); goto mmio_free; }
/* map the doorbell aperture */ hw->db_vaddr = pci_iomap(pdev, 3, max_ccb * ONE_DB_SIZE); if (hw->db_vaddr == NULL) { dev_err(&pdev->dev, "Error mapping doorbell\n"); goto ram_free; }
return 0;ram_free: pci_iounmap(pdev, hw->ram_vaddr);mmio_free: pci_iounmap(pdev, hw->mmio_vaddr);out: return -ENOMEM;}
static void ilo_remove(struct pci_dev *pdev){ int i, minor; struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev);
if (!ilo_hw) return;
clear_device(ilo_hw);
minor = MINOR(ilo_hw->cdev.dev); for (i = minor; i < minor + max_ccb; i++) device_destroy(&ilo_class, MKDEV(ilo_major, i));
cdev_del(&ilo_hw->cdev); ilo_disable_interrupts(ilo_hw); free_irq(pdev->irq, ilo_hw); ilo_unmap_device(pdev, ilo_hw); pci_release_regions(pdev); /* * pci_disable_device(pdev) used to be here. But this PCI device has * two functions with interrupt lines connected to a single pin. The * other one is a USB host controller. So when we disable the PIN here * e.g. by rmmod hpilo, the controller stops working. It is because * the interrupt link is disabled in ACPI since it is not refcounted * yet. See acpi_pci_link_free_irq called from acpi_pci_irq_disable. */ kfree(ilo_hw); ilo_hwdev[(minor / max_ccb)] = 0;}
static int ilo_probe(struct pci_dev *pdev, const struct pci_device_id *ent){ int devnum, slot, start, error = 0; struct ilo_hwinfo *ilo_hw;
if (pci_match_id(ilo_blacklist, pdev)) { dev_dbg(&pdev->dev, "Not supported on this device\n"); return -ENODEV; }
if (max_ccb > MAX_CCB) max_ccb = MAX_CCB; else if (max_ccb < MIN_CCB) max_ccb = MIN_CCB;
/* find a free range for device files */ for (devnum = 0; devnum < MAX_ILO_DEV; devnum++) { if (ilo_hwdev[devnum] == 0) { ilo_hwdev[devnum] = 1; break; } }
if (devnum == MAX_ILO_DEV) { dev_err(&pdev->dev, "Error finding free device\n"); return -ENODEV; }
/* track global allocations for this device */ error = -ENOMEM; ilo_hw = kzalloc_obj(*ilo_hw); if (!ilo_hw) goto out;
ilo_hw->ilo_dev = pdev; spin_lock_init(&ilo_hw->alloc_lock); spin_lock_init(&ilo_hw->fifo_lock); spin_lock_init(&ilo_hw->open_lock);
error = pci_enable_device(pdev); if (error) goto free;
pci_set_master(pdev);
error = pci_request_regions(pdev, ILO_NAME); if (error) goto disable;
error = ilo_map_device(pdev, ilo_hw); if (error) goto free_regions;
pci_set_drvdata(pdev, ilo_hw); clear_device(ilo_hw);
error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw); if (error) goto unmap;
ilo_enable_interrupts(ilo_hw);
cdev_init(&ilo_hw->cdev, &ilo_fops); ilo_hw->cdev.owner = THIS_MODULE; start = devnum * max_ccb; error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), max_ccb); if (error) { dev_err(&pdev->dev, "Could not add cdev\n"); goto remove_isr; }
for (slot = 0; slot < max_ccb; slot++) { struct device *dev; dev = device_create(&ilo_class, &pdev->dev, MKDEV(ilo_major, start + slot), NULL, "hpilo!d%dccb%d", devnum, slot); if (IS_ERR(dev)) dev_err(&pdev->dev, "Could not create files\n"); }
return 0;remove_isr: ilo_disable_interrupts(ilo_hw); free_irq(pdev->irq, ilo_hw);unmap: ilo_unmap_device(pdev, ilo_hw);free_regions: pci_release_regions(pdev);disable:/* pci_disable_device(pdev); see comment in ilo_remove */free: kfree(ilo_hw);out: ilo_hwdev[devnum] = 0; return error;}
static const struct pci_device_id ilo_devices[] = { { PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) }, { PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) }, { }};MODULE_DEVICE_TABLE(pci, ilo_devices);
static struct pci_driver ilo_driver = { .name = ILO_NAME, .id_table = ilo_devices, .probe = ilo_probe, .remove = ilo_remove,};
static int __init ilo_init(void){ int error; dev_t dev;
error = class_register(&ilo_class); if (error) goto out;
error = alloc_chrdev_region(&dev, 0, MAX_OPEN, ILO_NAME); if (error) goto class_destroy;
ilo_major = MAJOR(dev);
error = pci_register_driver(&ilo_driver); if (error) goto chr_remove;
return 0;chr_remove: unregister_chrdev_region(dev, MAX_OPEN);class_destroy: class_unregister(&ilo_class);out: return error;}
static void __exit ilo_exit(void){ pci_unregister_driver(&ilo_driver); unregister_chrdev_region(MKDEV(ilo_major, 0), MAX_OPEN); class_unregister(&ilo_class);}
MODULE_VERSION("1.5.0");MODULE_ALIAS(ILO_NAME);MODULE_DESCRIPTION(ILO_NAME);MODULE_AUTHOR("David Altobelli <david.altobelli@hpe.com>");MODULE_LICENSE("GPL v2");
module_param(max_ccb, uint, 0444);MODULE_PARM_DESC(max_ccb, "Maximum number of HP iLO channels to attach (8-24)(default=16)");
module_init(ilo_init);module_exit(ilo_exit);