diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/hpilo.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/misc/hpilo.c | 889 |
1 files changed, 0 insertions, 889 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/hpilo.c b/ANDROID_3.4.5/drivers/misc/hpilo.c deleted file mode 100644 index fffc2271..00000000 --- a/ANDROID_3.4.5/drivers/misc/hpilo.c +++ /dev/null @@ -1,889 +0,0 @@ -/* - * Driver for the HP iLO management processor. - * - * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. - * David Altobelli <david.altobelli@hp.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/module.h> -#include <linux/fs.h> -#include <linux/pci.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/device.h> -#include <linux/file.h> -#include <linux/cdev.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include <linux/delay.h> -#include <linux/uaccess.h> -#include <linux/io.h> -#include <linux/wait.h> -#include <linux/poll.h> -#include <linux/slab.h> -#include "hpilo.h" - -static struct class *ilo_class; -static unsigned int ilo_major; -static char ilo_hwdev[MAX_ILO_DEV]; - -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 */ - pci_free_consistent(pdev, 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 = pci_alloc_consistent(hw->ilo_dev, data->dma_size, - &data->dma_pa); - if (!data->dma_va) - return -ENOMEM; - - dma_va = (char *)data->dma_va; - dma_pa = data->dma_pa; - - memset(dma_va, 0, data->dma_size); - - 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 int is_device_reset(struct ilo_hwinfo *hw) -{ - /* check for global reset condition */ - return is_db_reset(get_device_outbound(hw)); -} - -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 unsigned int 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 POLLERR; - else if (ilo_pkt_recv(data->ilo_hw, driver_ccb)) - return POLLIN | POLLRDNORM; - - 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(sizeof(*data), GFP_KERNEL); - 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 __devinit ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) -{ - int error = -ENOMEM; - - /* 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 */ - hw->ram_vaddr = pci_iomap(pdev, 2, 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 error; -} - -static void ilo_remove(struct pci_dev *pdev) -{ - int i, minor; - struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev); - - 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); - kfree(ilo_hw); - ilo_hwdev[(minor / MAX_CCB)] = 0; -} - -static int __devinit ilo_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - int devnum, minor, start, error; - struct ilo_hwinfo *ilo_hw; - - /* 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(sizeof(*ilo_hw), GFP_KERNEL); - 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 (minor = 0 ; minor < MAX_CCB; minor++) { - struct device *dev; - dev = device_create(ilo_class, &pdev->dev, - MKDEV(ilo_major, minor), NULL, - "hpilo!d%dccb%d", devnum, minor); - 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); -free: - kfree(ilo_hw); -out: - ilo_hwdev[devnum] = 0; - return error; -} - -static 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 = __devexit_p(ilo_remove), -}; - -static int __init ilo_init(void) -{ - int error; - dev_t dev; - - ilo_class = class_create(THIS_MODULE, "iLO"); - if (IS_ERR(ilo_class)) { - error = PTR_ERR(ilo_class); - 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_destroy(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_destroy(ilo_class); -} - -MODULE_VERSION("1.2"); -MODULE_ALIAS(ILO_NAME); -MODULE_DESCRIPTION(ILO_NAME); -MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>"); -MODULE_LICENSE("GPL v2"); - -module_init(ilo_init); -module_exit(ilo_exit); |