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eefbc594ab
Using an uninitialized variable 'devnum' after 'goto out;' was causing panic. Just go ahead and return, we need to ignore AUX iLO devs. Oops: 0002 [#1] SMP . . . RIP [<ffffffffa033e270>] ilo_probe+0xec/0xe7c [hpilo] Signed-off-by: Mark Rusk <mark.rusk@hp.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
913 lines
22 KiB
C
913 lines
22 KiB
C
/*
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* Driver for the HP iLO management processor.
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*
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* Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
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* David Altobelli <david.altobelli@hp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/device.h>
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#include <linux/file.h>
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#include <linux/cdev.h>
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#include <linux/sched.h>
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#include <linux/spinlock.h>
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#include <linux/delay.h>
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#include <linux/uaccess.h>
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#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"
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static struct class *ilo_class;
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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];
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static inline int get_entry_id(int entry)
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{
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return (entry & ENTRY_MASK_DESCRIPTOR) >> ENTRY_BITPOS_DESCRIPTOR;
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}
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static inline int get_entry_len(int entry)
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{
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return ((entry & ENTRY_MASK_QWORDS) >> ENTRY_BITPOS_QWORDS) << 3;
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}
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static inline int mk_entry(int id, int len)
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{
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int qlen = len & 7 ? (len >> 3) + 1 : len >> 3;
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return id << ENTRY_BITPOS_DESCRIPTOR | qlen << ENTRY_BITPOS_QWORDS;
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}
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static inline int desc_mem_sz(int nr_entry)
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{
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return nr_entry << L2_QENTRY_SZ;
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}
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/*
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* FIFO queues, shared with hardware.
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*
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* If a queue has empty slots, an entry is added to the queue tail,
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* and that entry is marked as occupied.
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* Entries can be dequeued from the head of the list, when the device
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* has marked the entry as consumed.
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*
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* Returns true on successful queue/dequeue, false on failure.
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*/
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static int fifo_enqueue(struct ilo_hwinfo *hw, char *fifobar, int entry)
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{
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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]
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& ENTRY_MASK_O)) {
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fifo_q->fifobar[fifo_q->tail & fifo_q->imask] |=
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(entry & ENTRY_MASK_NOSTATE) | fifo_q->merge;
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fifo_q->tail += 1;
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ret = 1;
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}
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spin_unlock_irqrestore(&hw->fifo_lock, flags);
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return ret;
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}
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static int fifo_dequeue(struct ilo_hwinfo *hw, char *fifobar, int *entry)
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{
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struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
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unsigned long flags;
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int ret = 0;
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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];
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if (c & ENTRY_MASK_C) {
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if (entry)
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*entry = c & ENTRY_MASK_NOSTATE;
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fifo_q->fifobar[fifo_q->head & fifo_q->imask] =
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(c | ENTRY_MASK) + 1;
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fifo_q->head += 1;
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ret = 1;
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}
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spin_unlock_irqrestore(&hw->fifo_lock, flags);
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return ret;
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}
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static int fifo_check_recv(struct ilo_hwinfo *hw, char *fifobar)
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{
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struct fifo *fifo_q = FIFOBARTOHANDLE(fifobar);
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unsigned long flags;
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int ret = 0;
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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];
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if (c & ENTRY_MASK_C)
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ret = 1;
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spin_unlock_irqrestore(&hw->fifo_lock, flags);
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return ret;
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}
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static int ilo_pkt_enqueue(struct ilo_hwinfo *hw, struct ccb *ccb,
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int dir, int id, int len)
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{
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char *fifobar;
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int entry;
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if (dir == SENDQ)
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fifobar = ccb->ccb_u1.send_fifobar;
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else
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fifobar = ccb->ccb_u3.recv_fifobar;
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entry = mk_entry(id, len);
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return fifo_enqueue(hw, fifobar, entry);
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}
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static int ilo_pkt_dequeue(struct ilo_hwinfo *hw, struct ccb *ccb,
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int dir, int *id, int *len, void **pkt)
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{
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char *fifobar, *desc;
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int entry = 0, pkt_id = 0;
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int ret;
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if (dir == SENDQ) {
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fifobar = ccb->ccb_u1.send_fifobar;
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desc = ccb->ccb_u2.send_desc;
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} else {
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fifobar = ccb->ccb_u3.recv_fifobar;
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desc = ccb->ccb_u4.recv_desc;
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}
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ret = fifo_dequeue(hw, fifobar, &entry);
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if (ret) {
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pkt_id = get_entry_id(entry);
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if (id)
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*id = pkt_id;
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if (len)
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*len = get_entry_len(entry);
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if (pkt)
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*pkt = (void *)(desc + desc_mem_sz(pkt_id));
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}
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return ret;
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}
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static int ilo_pkt_recv(struct ilo_hwinfo *hw, struct ccb *ccb)
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{
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char *fifobar = ccb->ccb_u3.recv_fifobar;
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return fifo_check_recv(hw, fifobar);
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}
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static inline void doorbell_set(struct ccb *ccb)
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{
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iowrite8(1, ccb->ccb_u5.db_base);
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}
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static inline void doorbell_clr(struct ccb *ccb)
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{
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iowrite8(2, ccb->ccb_u5.db_base);
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}
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static inline int ctrl_set(int l2sz, int idxmask, int desclim)
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{
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int active = 0, go = 1;
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return l2sz << CTRL_BITPOS_L2SZ |
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idxmask << CTRL_BITPOS_FIFOINDEXMASK |
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desclim << CTRL_BITPOS_DESCLIMIT |
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active << CTRL_BITPOS_A |
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go << CTRL_BITPOS_G;
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}
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static void ctrl_setup(struct ccb *ccb, int nr_desc, int l2desc_sz)
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{
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/* for simplicity, use the same parameters for send and recv ctrls */
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ccb->send_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
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ccb->recv_ctrl = ctrl_set(l2desc_sz, nr_desc-1, nr_desc-1);
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}
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static inline int fifo_sz(int nr_entry)
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{
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/* size of a fifo is determined by the number of entries it contains */
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return (nr_entry * sizeof(u64)) + FIFOHANDLESIZE;
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}
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static void fifo_setup(void *base_addr, int nr_entry)
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{
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struct fifo *fifo_q = base_addr;
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int i;
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/* set up an empty fifo */
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fifo_q->head = 0;
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fifo_q->tail = 0;
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fifo_q->reset = 0;
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fifo_q->nrents = nr_entry;
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fifo_q->imask = nr_entry - 1;
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fifo_q->merge = ENTRY_MASK_O;
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for (i = 0; i < nr_entry; i++)
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fifo_q->fifobar[i] = 0;
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}
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static void ilo_ccb_close(struct pci_dev *pdev, struct ccb_data *data)
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{
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struct ccb *driver_ccb = &data->driver_ccb;
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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 */
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doorbell_clr(driver_ccb);
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iowrite32(ioread32(&device_ccb->send_ctrl) & ~(1 << CTRL_BITPOS_G),
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&device_ccb->send_ctrl);
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iowrite32(ioread32(&device_ccb->recv_ctrl) & ~(1 << CTRL_BITPOS_G),
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&device_ccb->recv_ctrl);
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/* 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))
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&&
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!(ioread32(&device_ccb->recv_ctrl) & (1 << CTRL_BITPOS_A)))
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break;
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}
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if (retries == 0)
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dev_err(&pdev->dev, "Closing, but controller still active\n");
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/* clear the hw ccb */
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memset_io(device_ccb, 0, sizeof(struct ccb));
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/* free resources used to back send/recv queues */
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pci_free_consistent(pdev, data->dma_size, data->dma_va, data->dma_pa);
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}
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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;
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dma_addr_t dma_pa;
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struct ccb *driver_ccb, *ilo_ccb;
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driver_ccb = &data->driver_ccb;
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ilo_ccb = &data->ilo_ccb;
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data->dma_size = 2 * fifo_sz(NR_QENTRY) +
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2 * desc_mem_sz(NR_QENTRY) +
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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);
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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);
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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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/*
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* Create two ccb's, one with virt addrs, one with phys addrs.
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* Copy the phys addr ccb to device shared mem.
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*/
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ctrl_setup(driver_ccb, NR_QENTRY, L2_QENTRY_SZ);
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ctrl_setup(ilo_ccb, NR_QENTRY, L2_QENTRY_SZ);
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fifo_setup(dma_va, NR_QENTRY);
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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);
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dma_pa += fifo_sz(NR_QENTRY);
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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);
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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);
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dma_pa += fifo_sz(NR_QENTRY);
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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);
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dma_va += desc_mem_sz(NR_QENTRY);
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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;
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ilo_ccb->channel = slot;
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driver_ccb->ccb_u5.db_base = hw->db_vaddr + (slot << L2_DB_SIZE);
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ilo_ccb->ccb_u5.db_base = NULL; /* hw ccb's doorbell is not used */
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return 0;
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}
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static void ilo_ccb_open(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
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{
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int pkt_id, pkt_sz;
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struct ccb *driver_ccb = &data->driver_ccb;
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/* copy the ccb with physical addrs to device memory */
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data->mapped_ccb = (struct ccb __iomem *)
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(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 */
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pkt_sz = 0;
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for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++) {
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ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, pkt_sz);
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doorbell_set(driver_ccb);
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}
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pkt_sz = desc_mem_sz(1);
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for (pkt_id = 0; pkt_id < NR_QENTRY; pkt_id++)
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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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}
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static int ilo_ccb_verify(struct ilo_hwinfo *hw, struct ccb_data *data)
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{
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int pkt_id, i;
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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))
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break;
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udelay(WAIT_TIME);
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}
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if (i == 0) {
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dev_err(&hw->ilo_dev->dev, "Open could not dequeue a packet\n");
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return -EBUSY;
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}
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ilo_pkt_enqueue(hw, driver_ccb, SENDQ, pkt_id, 0);
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doorbell_set(driver_ccb);
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return 0;
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}
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static inline int is_channel_reset(struct ccb *ccb)
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{
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/* check for this particular channel needing a reset */
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return FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset;
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}
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static inline void set_channel_reset(struct ccb *ccb)
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{
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/* set a flag indicating this channel needs a reset */
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FIFOBARTOHANDLE(ccb->ccb_u1.send_fifobar)->reset = 1;
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}
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static inline int get_device_outbound(struct ilo_hwinfo *hw)
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{
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return ioread32(&hw->mmio_vaddr[DB_OUT]);
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}
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static inline int is_db_reset(int db_out)
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{
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return db_out & (1 << DB_RESET);
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}
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static inline int is_device_reset(struct ilo_hwinfo *hw)
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{
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/* check for global reset condition */
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return is_db_reset(get_device_outbound(hw));
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}
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static inline void clear_pending_db(struct ilo_hwinfo *hw, int clr)
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{
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iowrite32(clr, &hw->mmio_vaddr[DB_OUT]);
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}
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static inline void clear_device(struct ilo_hwinfo *hw)
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{
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/* 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)
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{
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iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) | 1, &hw->mmio_vaddr[DB_IRQ]);
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}
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static inline void ilo_disable_interrupts(struct ilo_hwinfo *hw)
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{
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iowrite8(ioread8(&hw->mmio_vaddr[DB_IRQ]) & ~1,
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&hw->mmio_vaddr[DB_IRQ]);
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}
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static void ilo_set_reset(struct ilo_hwinfo *hw)
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{
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int slot;
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/*
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* Mapped memory is zeroed on ilo reset, so set a per ccb flag
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* to indicate that this ccb needs to be closed and reopened.
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*/
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for (slot = 0; slot < max_ccb; slot++) {
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if (!hw->ccb_alloc[slot])
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continue;
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set_channel_reset(&hw->ccb_alloc[slot]->driver_ccb);
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}
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}
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static ssize_t ilo_read(struct file *fp, char __user *buf,
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size_t len, loff_t *off)
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{
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int err, found, cnt, pkt_id, pkt_len;
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struct ccb_data *data = fp->private_data;
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struct ccb *driver_ccb = &data->driver_ccb;
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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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/*
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* If the device has been reset, applications
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* need to close and reopen all ccbs.
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*/
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return -ENODEV;
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}
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/*
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* This function is to be called when data is expected
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* in the channel, and will return an error if no packet is found
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* during the loop below. The sleep/retry logic is to allow
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* applications to call read() immediately post write(),
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* and give iLO some time to process the sent packet.
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*/
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cnt = 20;
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do {
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/* look for a received packet */
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found = ilo_pkt_dequeue(hw, driver_ccb, RECVQ, &pkt_id,
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&pkt_len, &pkt);
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if (found)
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break;
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cnt--;
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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 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);
|
|
|
|
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, minor, start, error = 0;
|
|
struct ilo_hwinfo *ilo_hw;
|
|
|
|
/* Ignore subsystem_device = 0x1979 (set by BIOS) */
|
|
if (pdev->subsystem_device == 0x1979)
|
|
return 0;
|
|
|
|
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(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); see comment in ilo_remove */
|
|
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 = 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("1.4.1");
|
|
MODULE_ALIAS(ILO_NAME);
|
|
MODULE_DESCRIPTION(ILO_NAME);
|
|
MODULE_AUTHOR("David Altobelli <david.altobelli@hp.com>");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
module_param(max_ccb, uint, 0444);
|
|
MODULE_PARM_DESC(max_ccb, "Maximum number of HP iLO channels to attach (16)");
|
|
|
|
module_init(ilo_init);
|
|
module_exit(ilo_exit);
|