| /* |
| * Driver for HP iLO/iLO2 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/spinlock.h> |
| #include <linux/delay.h> |
| #include <linux/uaccess.h> |
| #include <linux/io.h> |
| #include <linux/wait.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 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 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_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 = (char *)data->dma_pa; |
| |
| memset(dma_va, 0, data->dma_size); |
| |
| dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN); |
| dma_pa = (char *)roundup((unsigned long)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 = 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 = (char *)roundup((unsigned long)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 = 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 = 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 = 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 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, |
| .open = ilo_open, |
| .release = ilo_close, |
| }; |
| |
| 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("1.1"); |
| 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); |