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drivers/misc/hpilo.c
21.8 KB
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/* |
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* Driver for the HP iLO management processor. |
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* * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. |
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* David Altobelli <david.altobelli@hpe.com> |
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* * 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> |
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#include <linux/interrupt.h> |
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#include <linux/ioport.h> #include <linux/device.h> #include <linux/file.h> #include <linux/cdev.h> |
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#include <linux/sched.h> |
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#include <linux/spinlock.h> #include <linux/delay.h> #include <linux/uaccess.h> #include <linux/io.h> |
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#include <linux/wait.h> |
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#include <linux/poll.h> |
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#include <linux/slab.h> |
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#include "hpilo.h" static struct class *ilo_class; static unsigned int ilo_major; |
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static unsigned int max_ccb = 16; |
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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); |
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unsigned long flags; |
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int ret = 0; |
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spin_lock_irqsave(&hw->fifo_lock, flags); |
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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; } |
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spin_unlock_irqrestore(&hw->fifo_lock, flags); |
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return ret; } static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry) { struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar); |
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unsigned long flags; |
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int ret = 0; u64 c; |
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spin_lock_irqsave(&hw->fifo_lock, flags); |
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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; } |
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spin_unlock_irqrestore(&hw->fifo_lock, flags); |
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return ret; } |
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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; } |
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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; } |
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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); } |
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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); } |
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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; } |
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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) { |
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struct ccb *driver_ccb = &data->driver_ccb; struct ccb __iomem *device_ccb = data->mapped_ccb; |
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int retries; |
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/* 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 */ |
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for (retries = MAX_WAIT; retries > 0; retries--) { |
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doorbell_set(driver_ccb); |
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udelay(WAIT_TIME); |
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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 "); /* 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); } |
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static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot) |
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{ |
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char *dma_va; dma_addr_t dma_pa; |
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struct ccb *driver_ccb, *ilo_ccb; |
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driver_ccb = &data->driver_ccb; ilo_ccb = &data->ilo_ccb; |
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data->dma_size = 2 * fifo_sz(NR_QENTRY) + 2 * desc_mem_sz(NR_QENTRY) + ILO_START_ALIGN + ILO_CACHE_SZ; |
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data->dma_va = pci_alloc_consistent(hw->ilo_dev, data->dma_size, |
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&data->dma_pa); if (!data->dma_va) |
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return -ENOMEM; |
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dma_va = (char *)data->dma_va; |
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dma_pa = data->dma_pa; |
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memset(dma_va, 0, data->dma_size); dma_va = (char *)roundup((unsigned long)dma_va, ILO_START_ALIGN); |
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dma_pa = roundup(dma_pa, ILO_START_ALIGN); |
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/* * 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; |
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ilo_ccb->ccb_u1.send_fifobar_pa = dma_pa + FIFOHANDLESIZE; |
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dma_va += fifo_sz(NR_QENTRY); dma_pa += fifo_sz(NR_QENTRY); dma_va = (char *)roundup((unsigned long)dma_va, ILO_CACHE_SZ); |
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dma_pa = roundup(dma_pa, ILO_CACHE_SZ); |
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fifo_setup(dma_va, NR_QENTRY); driver_ccb->ccb_u3.recv_fifobar = dma_va + FIFOHANDLESIZE; |
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ilo_ccb->ccb_u3.recv_fifobar_pa = dma_pa + FIFOHANDLESIZE; |
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dma_va += fifo_sz(NR_QENTRY); dma_pa += fifo_sz(NR_QENTRY); driver_ccb->ccb_u2.send_desc = dma_va; |
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ilo_ccb->ccb_u2.send_desc_pa = dma_pa; |
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dma_pa += desc_mem_sz(NR_QENTRY); dma_va += desc_mem_sz(NR_QENTRY); driver_ccb->ccb_u4.recv_desc = dma_va; |
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ilo_ccb->ccb_u4.recv_desc_pa = dma_pa; |
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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 */ |
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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; |
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/* copy the ccb with physical addrs to device memory */ data->mapped_ccb = (struct ccb __iomem *) (hw->ram_vaddr + (slot * ILOHW_CCB_SZ)); |
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memcpy_toio(data->mapped_ccb, &data->ilo_ccb, sizeof(struct ccb)); |
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/* 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); |
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/* the ccb is ready to use */ |
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doorbell_clr(driver_ccb); |
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} static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data) { int pkt_id, i; struct ccb *driver_ccb = &data->driver_ccb; |
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/* make sure iLO is really handling requests */ |
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for (i = MAX_WAIT; i > 0; i--) { |
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if (ilo_pkt_dequeue(hw, driver_ccb, SENDQ, &pkt_id, NULL, NULL)) break; |
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udelay(WAIT_TIME); |
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} |
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if (i == 0) { dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet "); return -EBUSY; |
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} |
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ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0); doorbell_set(driver_ccb); |
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return 0; |
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} 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; } |
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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); } |
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static inline int is_device_reset(struct ilo_hwinfo *hw) { /* check for global reset condition */ |
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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]); |
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} static inline void clear_device(struct ilo_hwinfo *hw) { /* clear the device (reset bits, pending channel entries) */ |
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clear_pending_db(hw, -1); |
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} |
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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) |
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{ 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. */ |
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for (slot = 0; slot < max_ccb; slot++) { |
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if (!hw->ccb_alloc[slot]) continue; set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb); } |
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} 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; |
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struct ccb_data *data = fp->private_data; struct ccb *driver_ccb = &data->driver_ccb; struct ilo_hwinfo *hw = data->ilo_hw; |
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void *pkt; |
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if (is_channel_reset(driver_ccb)) { |
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/* * If the device has been reset, applications * need to close and reopen all ccbs. */ |
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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; |
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struct ccb_data *data = fp->private_data; struct ccb *driver_ccb = &data->driver_ccb; struct ilo_hwinfo *hw = data->ilo_hw; |
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void *pkt; |
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if (is_channel_reset(driver_ccb)) |
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return -ENODEV; |
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/* 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; } |
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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; } |
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static int ilo_close(struct inode *ip, struct file *fp) { int slot; struct ccb_data *data; struct ilo_hwinfo *hw; |
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unsigned long flags; |
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slot = iminor(ip) % max_ccb; |
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hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); |
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spin_lock(&hw->open_lock); |
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if (hw->ccb_alloc[slot]->ccb_cnt == 1) { data = fp->private_data; |
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spin_lock_irqsave(&hw->alloc_lock, flags); hw->ccb_alloc[slot] = NULL; spin_unlock_irqrestore(&hw->alloc_lock, flags); |
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ilo_ccb_close(hw->ilo_dev, data); kfree(data); |
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} else hw->ccb_alloc[slot]->ccb_cnt--; |
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spin_unlock(&hw->open_lock); |
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return 0; } static int ilo_open(struct inode *ip, struct file *fp) { int slot, error; struct ccb_data *data; struct ilo_hwinfo *hw; |
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unsigned long flags; |
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|
98dcd59dd misc: hpilo: incr... |
547 |
slot = iminor(ip) % max_ccb; |
89bcb05d9 HP iLO driver |
548 549 550 551 552 553 |
hw = container_of(ip->i_cdev, struct ilo_hwinfo, cdev); /* new ccb allocation */ data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; |
9f7048412 hpilo: add interr... |
554 |
spin_lock(&hw->open_lock); |
89bcb05d9 HP iLO driver |
555 556 557 558 |
/* each fd private_data holds sw/hw view of ccb */ if (hw->ccb_alloc[slot] == NULL) { /* create a channel control block for this minor */ |
66d5e5169 hpilo: staging fo... |
559 560 |
error = ilo_ccb_setup(hw, data, slot); if (error) { |
89bcb05d9 HP iLO driver |
561 |
kfree(data); |
66d5e5169 hpilo: staging fo... |
562 563 |
goto out; } |
9f7048412 hpilo: add interr... |
564 565 566 567 |
data->ccb_cnt = 1; data->ccb_excl = fp->f_flags & O_EXCL; data->ilo_hw = hw; init_waitqueue_head(&data->ccb_waitq); |
66d5e5169 hpilo: staging fo... |
568 |
/* write the ccb to hw */ |
9f7048412 hpilo: add interr... |
569 |
spin_lock_irqsave(&hw->alloc_lock, flags); |
66d5e5169 hpilo: staging fo... |
570 |
ilo_ccb_open(hw, data, slot); |
9f7048412 hpilo: add interr... |
571 572 |
hw->ccb_alloc[slot] = data; spin_unlock_irqrestore(&hw->alloc_lock, flags); |
66d5e5169 hpilo: staging fo... |
573 574 575 576 |
/* make sure the channel is functional */ error = ilo_ccb_verify(hw, data); if (error) { |
9f7048412 hpilo: add interr... |
577 578 579 580 |
spin_lock_irqsave(&hw->alloc_lock, flags); hw->ccb_alloc[slot] = NULL; spin_unlock_irqrestore(&hw->alloc_lock, flags); |
66d5e5169 hpilo: staging fo... |
581 |
ilo_ccb_close(hw->ilo_dev, data); |
9f7048412 hpilo: add interr... |
582 |
|
66d5e5169 hpilo: staging fo... |
583 584 585 |
kfree(data); goto out; } |
89bcb05d9 HP iLO driver |
586 587 588 589 590 591 592 593 594 595 596 597 598 599 |
} 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; } } |
66d5e5169 hpilo: staging fo... |
600 |
out: |
9f7048412 hpilo: add interr... |
601 |
spin_unlock(&hw->open_lock); |
89bcb05d9 HP iLO driver |
602 603 604 605 606 607 608 609 610 611 612 |
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, |
4a351471d hpilo: add poll f_op |
613 |
.poll = ilo_poll, |
89bcb05d9 HP iLO driver |
614 615 |
.open = ilo_open, .release = ilo_close, |
6038f373a llseek: automatic... |
616 |
.llseek = noop_llseek, |
89bcb05d9 HP iLO driver |
617 |
}; |
9f7048412 hpilo: add interr... |
618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 |
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); } |
98dcd59dd misc: hpilo: incr... |
637 |
for (i = 0; i < max_ccb; i++) { |
9f7048412 hpilo: add interr... |
638 639 640 641 642 643 644 645 646 647 648 649 650 |
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; } |
89bcb05d9 HP iLO driver |
651 652 653 654 655 656 |
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); } |
80c8ae289 misc: remove use ... |
657 |
static int ilo_map_device(struct pci_dev *pdev, struct ilo_hwinfo *hw) |
89bcb05d9 HP iLO driver |
658 |
{ |
c9fef1cc3 drivers/misc/hpil... |
659 660 |
int bar; unsigned long off; |
89bcb05d9 HP iLO driver |
661 662 663 664 665 666 667 668 669 670 |
/* 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 "); goto out; } /* map the adapter shared memory region */ |
c9fef1cc3 drivers/misc/hpil... |
671 672 673 674 675 676 677 678 679 |
if (pdev->subsystem_device == 0x00E4) { 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); |
89bcb05d9 HP iLO driver |
680 681 682 683 684 685 686 |
if (hw->ram_vaddr == NULL) { dev_err(&pdev->dev, "Error mapping shared mem "); goto mmio_free; } /* map the doorbell aperture */ |
98dcd59dd misc: hpilo: incr... |
687 |
hw->db_vaddr = pci_iomap(pdev, 3, max_ccb * ONE_DB_SIZE); |
89bcb05d9 HP iLO driver |
688 689 690 691 692 693 694 695 696 697 698 699 |
if (hw->db_vaddr == NULL) { dev_err(&pdev->dev, "Error mapping doorbell "); goto ram_free; } return 0; ram_free: pci_iounmap(pdev, hw->ram_vaddr); mmio_free: pci_iounmap(pdev, hw->mmio_vaddr); out: |
c9fef1cc3 drivers/misc/hpil... |
700 |
return -ENOMEM; |
89bcb05d9 HP iLO driver |
701 702 703 704 705 706 |
} static void ilo_remove(struct pci_dev *pdev) { int i, minor; struct ilo_hwinfo *ilo_hw = pci_get_drvdata(pdev); |
ebf1b764a misc: hpilo: igno... |
707 708 |
if (!ilo_hw) return; |
89bcb05d9 HP iLO driver |
709 710 711 |
clear_device(ilo_hw); minor = MINOR(ilo_hw->cdev.dev); |
98dcd59dd misc: hpilo: incr... |
712 |
for (i = minor; i < minor + max_ccb; i++) |
89bcb05d9 HP iLO driver |
713 714 715 |
device_destroy(ilo_class, MKDEV(ilo_major, i)); cdev_del(&ilo_hw->cdev); |
9f7048412 hpilo: add interr... |
716 717 |
ilo_disable_interrupts(ilo_hw); free_irq(pdev->irq, ilo_hw); |
89bcb05d9 HP iLO driver |
718 719 |
ilo_unmap_device(pdev, ilo_hw); pci_release_regions(pdev); |
bcdee04ea MISC: hpilo, remo... |
720 721 722 723 724 725 726 727 |
/* * 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. */ |
89bcb05d9 HP iLO driver |
728 |
kfree(ilo_hw); |
98dcd59dd misc: hpilo: incr... |
729 |
ilo_hwdev[(minor / max_ccb)] = 0; |
89bcb05d9 HP iLO driver |
730 |
} |
80c8ae289 misc: remove use ... |
731 |
static int ilo_probe(struct pci_dev *pdev, |
89bcb05d9 HP iLO driver |
732 733 |
const struct pci_device_id *ent) { |
ebf1b764a misc: hpilo: igno... |
734 |
int devnum, minor, start, error = 0; |
89bcb05d9 HP iLO driver |
735 |
struct ilo_hwinfo *ilo_hw; |
ebf1b764a misc: hpilo: igno... |
736 737 |
/* Ignore subsystem_device = 0x1979 (set by BIOS) */ if (pdev->subsystem_device == 0x1979) |
eefbc594a drivers/misc/hpil... |
738 |
return 0; |
ebf1b764a misc: hpilo: igno... |
739 |
|
98dcd59dd misc: hpilo: incr... |
740 741 742 743 |
if (max_ccb > MAX_CCB) max_ccb = MAX_CCB; else if (max_ccb < MIN_CCB) max_ccb = MIN_CCB; |
89bcb05d9 HP iLO driver |
744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 |
/* 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 "); 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); |
9f7048412 hpilo: add interr... |
767 |
spin_lock_init(&ilo_hw->open_lock); |
89bcb05d9 HP iLO driver |
768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 |
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); |
9f7048412 hpilo: add interr... |
785 786 787 788 789 |
error = request_irq(pdev->irq, ilo_isr, IRQF_SHARED, "hpilo", ilo_hw); if (error) goto unmap; ilo_enable_interrupts(ilo_hw); |
89bcb05d9 HP iLO driver |
790 791 |
cdev_init(&ilo_hw->cdev, &ilo_fops); ilo_hw->cdev.owner = THIS_MODULE; |
98dcd59dd misc: hpilo: incr... |
792 793 |
start = devnum * max_ccb; error = cdev_add(&ilo_hw->cdev, MKDEV(ilo_major, start), max_ccb); |
89bcb05d9 HP iLO driver |
794 795 796 |
if (error) { dev_err(&pdev->dev, "Could not add cdev "); |
9f7048412 hpilo: add interr... |
797 |
goto remove_isr; |
89bcb05d9 HP iLO driver |
798 |
} |
98dcd59dd misc: hpilo: incr... |
799 |
for (minor = 0 ; minor < max_ccb; minor++) { |
89bcb05d9 HP iLO driver |
800 801 802 803 804 805 806 807 808 809 |
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 "); } return 0; |
9f7048412 hpilo: add interr... |
810 811 812 |
remove_isr: ilo_disable_interrupts(ilo_hw); free_irq(pdev->irq, ilo_hw); |
89bcb05d9 HP iLO driver |
813 814 815 816 817 |
unmap: ilo_unmap_device(pdev, ilo_hw); free_regions: pci_release_regions(pdev); disable: |
bcdee04ea MISC: hpilo, remo... |
818 |
/* pci_disable_device(pdev); see comment in ilo_remove */ |
89bcb05d9 HP iLO driver |
819 820 821 822 823 824 |
free: kfree(ilo_hw); out: ilo_hwdev[devnum] = 0; return error; } |
8efa6fb50 misc: hpilo: cons... |
825 |
static const struct pci_device_id ilo_devices[] = { |
89bcb05d9 HP iLO driver |
826 |
{ PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xB204) }, |
31d8b5631 hpilo: new pci de... |
827 |
{ PCI_DEVICE(PCI_VENDOR_ID_HP, 0x3307) }, |
89bcb05d9 HP iLO driver |
828 829 830 831 832 833 834 835 |
{ } }; MODULE_DEVICE_TABLE(pci, ilo_devices); static struct pci_driver ilo_driver = { .name = ILO_NAME, .id_table = ilo_devices, .probe = ilo_probe, |
2d6bed9ca drivers/misc: rem... |
836 |
.remove = ilo_remove, |
89bcb05d9 HP iLO driver |
837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 |
}; 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); } |
c9fef1cc3 drivers/misc/hpil... |
875 |
MODULE_VERSION("1.5.0"); |
89bcb05d9 HP iLO driver |
876 877 |
MODULE_ALIAS(ILO_NAME); MODULE_DESCRIPTION(ILO_NAME); |
6b1eb1450 misc: hpilo: Chan... |
878 |
MODULE_AUTHOR("David Altobelli <david.altobelli@hpe.com>"); |
89bcb05d9 HP iLO driver |
879 |
MODULE_LICENSE("GPL v2"); |
98dcd59dd misc: hpilo: incr... |
880 |
module_param(max_ccb, uint, 0444); |
7a56f329c misc: hpilo: Add ... |
881 |
MODULE_PARM_DESC(max_ccb, "Maximum number of HP iLO channels to attach (8-24)(default=16)"); |
98dcd59dd misc: hpilo: incr... |
882 |
|
89bcb05d9 HP iLO driver |
883 884 |
module_init(ilo_init); module_exit(ilo_exit); |