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![Stefan Richter](/assets/img/avatar_default.png)
The - raw1394 (/dev/raw1394), - video1394 (/dev/video1394/*), - dv1394 (/dev/dv1394/*) character device file ABIs do not make any use of lseek(), pread(), or pwrite(). Therefore use nonseekable_open() and, redundantly, set file_operations.llseek to no_llseek to remove any doubt whether the BKL- grabbing default_llseek handler is used. Although all this is legacy code which should be left in peace until it is eventually removed (as it is superseded by firewire-core's <linux/firewire-cdev.h> ABI), this change seems still worth doing to further minimize the presence of BKL usage in the kernel. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
3097 lines
83 KiB
C
3097 lines
83 KiB
C
/*
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* IEEE 1394 for Linux
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*
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* Raw interface to the bus
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*
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* Copyright (C) 1999, 2000 Andreas E. Bombe
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* 2001, 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
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* 2002 Christian Toegel <christian.toegel@gmx.at>
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*
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* This code is licensed under the GPL. See the file COPYING in the root
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* directory of the kernel sources for details.
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*
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*
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* Contributions:
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*
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* Manfred Weihs <weihs@ict.tuwien.ac.at>
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* configuration ROM manipulation
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* address range mapping
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* adaptation for new (transparent) loopback mechanism
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* sending of arbitrary async packets
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* Christian Toegel <christian.toegel@gmx.at>
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* address range mapping
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* lock64 request
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* transmit physical packet
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* busreset notification control (switch on/off)
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* busreset with selection of type (short/long)
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* request_reply
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*/
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/poll.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/vmalloc.h>
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#include <linux/cdev.h>
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#include <asm/uaccess.h>
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#include <asm/atomic.h>
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#include <linux/compat.h>
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#include "csr1212.h"
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#include "highlevel.h"
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#include "hosts.h"
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#include "ieee1394.h"
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#include "ieee1394_core.h"
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#include "ieee1394_hotplug.h"
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#include "ieee1394_transactions.h"
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#include "ieee1394_types.h"
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#include "iso.h"
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#include "nodemgr.h"
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#include "raw1394.h"
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#include "raw1394-private.h"
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#define int2ptr(x) ((void __user *)(unsigned long)x)
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#define ptr2int(x) ((u64)(unsigned long)(void __user *)x)
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#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
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#define RAW1394_DEBUG
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#endif
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#ifdef RAW1394_DEBUG
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#define DBGMSG(fmt, args...) \
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printk(KERN_INFO "raw1394:" fmt "\n" , ## args)
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#else
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#define DBGMSG(fmt, args...) do {} while (0)
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#endif
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static LIST_HEAD(host_info_list);
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static int host_count;
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static DEFINE_SPINLOCK(host_info_lock);
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static atomic_t internal_generation = ATOMIC_INIT(0);
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static atomic_t iso_buffer_size;
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static const int iso_buffer_max = 4 * 1024 * 1024; /* 4 MB */
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static struct hpsb_highlevel raw1394_highlevel;
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static int arm_read(struct hpsb_host *host, int nodeid, quadlet_t * buffer,
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u64 addr, size_t length, u16 flags);
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static int arm_write(struct hpsb_host *host, int nodeid, int destid,
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quadlet_t * data, u64 addr, size_t length, u16 flags);
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static int arm_lock(struct hpsb_host *host, int nodeid, quadlet_t * store,
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u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
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u16 flags);
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static int arm_lock64(struct hpsb_host *host, int nodeid, octlet_t * store,
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u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
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u16 flags);
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static const struct hpsb_address_ops arm_ops = {
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.read = arm_read,
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.write = arm_write,
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.lock = arm_lock,
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.lock64 = arm_lock64,
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};
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static void queue_complete_cb(struct pending_request *req);
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static struct pending_request *__alloc_pending_request(gfp_t flags)
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{
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struct pending_request *req;
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req = kzalloc(sizeof(*req), flags);
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if (req)
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INIT_LIST_HEAD(&req->list);
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return req;
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}
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static inline struct pending_request *alloc_pending_request(void)
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{
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return __alloc_pending_request(GFP_KERNEL);
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}
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static void free_pending_request(struct pending_request *req)
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{
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if (req->ibs) {
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if (atomic_dec_and_test(&req->ibs->refcount)) {
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atomic_sub(req->ibs->data_size, &iso_buffer_size);
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kfree(req->ibs);
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}
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} else if (req->free_data) {
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kfree(req->data);
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}
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hpsb_free_packet(req->packet);
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kfree(req);
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}
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/* fi->reqlists_lock must be taken */
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static void __queue_complete_req(struct pending_request *req)
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{
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struct file_info *fi = req->file_info;
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list_move_tail(&req->list, &fi->req_complete);
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wake_up(&fi->wait_complete);
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}
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static void queue_complete_req(struct pending_request *req)
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{
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unsigned long flags;
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struct file_info *fi = req->file_info;
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spin_lock_irqsave(&fi->reqlists_lock, flags);
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__queue_complete_req(req);
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spin_unlock_irqrestore(&fi->reqlists_lock, flags);
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}
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static void queue_complete_cb(struct pending_request *req)
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{
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struct hpsb_packet *packet = req->packet;
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int rcode = (packet->header[1] >> 12) & 0xf;
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switch (packet->ack_code) {
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case ACKX_NONE:
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case ACKX_SEND_ERROR:
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req->req.error = RAW1394_ERROR_SEND_ERROR;
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break;
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case ACKX_ABORTED:
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req->req.error = RAW1394_ERROR_ABORTED;
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break;
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case ACKX_TIMEOUT:
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req->req.error = RAW1394_ERROR_TIMEOUT;
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break;
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default:
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req->req.error = (packet->ack_code << 16) | rcode;
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break;
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}
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if (!((packet->ack_code == ACK_PENDING) && (rcode == RCODE_COMPLETE))) {
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req->req.length = 0;
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}
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if ((req->req.type == RAW1394_REQ_ASYNC_READ) ||
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(req->req.type == RAW1394_REQ_ASYNC_WRITE) ||
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(req->req.type == RAW1394_REQ_ASYNC_STREAM) ||
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(req->req.type == RAW1394_REQ_LOCK) ||
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(req->req.type == RAW1394_REQ_LOCK64))
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hpsb_free_tlabel(packet);
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queue_complete_req(req);
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}
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static void add_host(struct hpsb_host *host)
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{
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struct host_info *hi;
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unsigned long flags;
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hi = kmalloc(sizeof(*hi), GFP_KERNEL);
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if (hi) {
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INIT_LIST_HEAD(&hi->list);
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hi->host = host;
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INIT_LIST_HEAD(&hi->file_info_list);
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spin_lock_irqsave(&host_info_lock, flags);
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list_add_tail(&hi->list, &host_info_list);
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host_count++;
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spin_unlock_irqrestore(&host_info_lock, flags);
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}
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atomic_inc(&internal_generation);
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}
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static struct host_info *find_host_info(struct hpsb_host *host)
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{
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struct host_info *hi;
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list_for_each_entry(hi, &host_info_list, list)
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if (hi->host == host)
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return hi;
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return NULL;
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}
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static void remove_host(struct hpsb_host *host)
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{
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struct host_info *hi;
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unsigned long flags;
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spin_lock_irqsave(&host_info_lock, flags);
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hi = find_host_info(host);
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if (hi != NULL) {
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list_del(&hi->list);
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host_count--;
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/*
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FIXME: address ranges should be removed
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and fileinfo states should be initialized
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(including setting generation to
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internal-generation ...)
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*/
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}
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spin_unlock_irqrestore(&host_info_lock, flags);
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if (hi == NULL) {
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printk(KERN_ERR "raw1394: attempt to remove unknown host "
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"0x%p\n", host);
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return;
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}
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kfree(hi);
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atomic_inc(&internal_generation);
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}
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static void host_reset(struct hpsb_host *host)
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{
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unsigned long flags;
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struct host_info *hi;
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struct file_info *fi;
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struct pending_request *req;
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spin_lock_irqsave(&host_info_lock, flags);
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hi = find_host_info(host);
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if (hi != NULL) {
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list_for_each_entry(fi, &hi->file_info_list, list) {
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if (fi->notification == RAW1394_NOTIFY_ON) {
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req = __alloc_pending_request(GFP_ATOMIC);
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if (req != NULL) {
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req->file_info = fi;
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req->req.type = RAW1394_REQ_BUS_RESET;
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req->req.generation =
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get_hpsb_generation(host);
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req->req.misc = (host->node_id << 16)
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| host->node_count;
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if (fi->protocol_version > 3) {
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req->req.misc |=
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(NODEID_TO_NODE
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(host->irm_id)
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<< 8);
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}
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queue_complete_req(req);
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}
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}
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}
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}
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spin_unlock_irqrestore(&host_info_lock, flags);
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}
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static void fcp_request(struct hpsb_host *host, int nodeid, int direction,
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int cts, u8 * data, size_t length)
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{
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unsigned long flags;
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struct host_info *hi;
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struct file_info *fi;
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struct pending_request *req, *req_next;
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struct iso_block_store *ibs = NULL;
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LIST_HEAD(reqs);
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if ((atomic_read(&iso_buffer_size) + length) > iso_buffer_max) {
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HPSB_INFO("dropped fcp request");
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return;
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}
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spin_lock_irqsave(&host_info_lock, flags);
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hi = find_host_info(host);
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if (hi != NULL) {
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list_for_each_entry(fi, &hi->file_info_list, list) {
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if (!fi->fcp_buffer)
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continue;
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req = __alloc_pending_request(GFP_ATOMIC);
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if (!req)
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break;
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if (!ibs) {
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ibs = kmalloc(sizeof(*ibs) + length,
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GFP_ATOMIC);
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if (!ibs) {
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kfree(req);
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break;
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}
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atomic_add(length, &iso_buffer_size);
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atomic_set(&ibs->refcount, 0);
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ibs->data_size = length;
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memcpy(ibs->data, data, length);
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}
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atomic_inc(&ibs->refcount);
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req->file_info = fi;
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req->ibs = ibs;
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req->data = ibs->data;
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req->req.type = RAW1394_REQ_FCP_REQUEST;
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req->req.generation = get_hpsb_generation(host);
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req->req.misc = nodeid | (direction << 16);
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req->req.recvb = ptr2int(fi->fcp_buffer);
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req->req.length = length;
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list_add_tail(&req->list, &reqs);
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}
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}
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spin_unlock_irqrestore(&host_info_lock, flags);
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list_for_each_entry_safe(req, req_next, &reqs, list)
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queue_complete_req(req);
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}
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#ifdef CONFIG_COMPAT
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struct compat_raw1394_req {
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__u32 type;
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__s32 error;
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__u32 misc;
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__u32 generation;
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__u32 length;
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__u64 address;
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__u64 tag;
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__u64 sendb;
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__u64 recvb;
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}
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#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
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__attribute__((packed))
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#endif
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;
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static const char __user *raw1394_compat_write(const char __user *buf)
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{
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struct compat_raw1394_req __user *cr = (typeof(cr)) buf;
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struct raw1394_request __user *r;
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r = compat_alloc_user_space(sizeof(struct raw1394_request));
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#define C(x) __copy_in_user(&r->x, &cr->x, sizeof(r->x))
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if (copy_in_user(r, cr, sizeof(struct compat_raw1394_req)) ||
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C(address) ||
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C(tag) ||
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C(sendb) ||
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C(recvb))
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return (__force const char __user *)ERR_PTR(-EFAULT);
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return (const char __user *)r;
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}
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#undef C
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#define P(x) __put_user(r->x, &cr->x)
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static int
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raw1394_compat_read(const char __user *buf, struct raw1394_request *r)
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{
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struct compat_raw1394_req __user *cr = (typeof(cr)) buf;
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if (!access_ok(VERIFY_WRITE, cr, sizeof(struct compat_raw1394_req)) ||
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P(type) ||
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P(error) ||
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P(misc) ||
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P(generation) ||
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P(length) ||
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P(address) ||
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P(tag) ||
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P(sendb) ||
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P(recvb))
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return -EFAULT;
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|
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return sizeof(struct compat_raw1394_req);
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}
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#undef P
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#endif
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|
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/* get next completed request (caller must hold fi->reqlists_lock) */
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static inline struct pending_request *__next_complete_req(struct file_info *fi)
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{
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struct list_head *lh;
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struct pending_request *req = NULL;
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|
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if (!list_empty(&fi->req_complete)) {
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lh = fi->req_complete.next;
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list_del(lh);
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req = list_entry(lh, struct pending_request, list);
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}
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return req;
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}
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|
|
/* atomically get next completed request */
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static struct pending_request *next_complete_req(struct file_info *fi)
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{
|
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unsigned long flags;
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struct pending_request *req;
|
|
|
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spin_lock_irqsave(&fi->reqlists_lock, flags);
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req = __next_complete_req(fi);
|
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spin_unlock_irqrestore(&fi->reqlists_lock, flags);
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return req;
|
|
}
|
|
|
|
static ssize_t raw1394_read(struct file *file, char __user * buffer,
|
|
size_t count, loff_t * offset_is_ignored)
|
|
{
|
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struct file_info *fi = (struct file_info *)file->private_data;
|
|
struct pending_request *req;
|
|
ssize_t ret;
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
if (count == sizeof(struct compat_raw1394_req)) {
|
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/* ok */
|
|
} else
|
|
#endif
|
|
if (count != sizeof(struct raw1394_request)) {
|
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return -EINVAL;
|
|
}
|
|
|
|
if (!access_ok(VERIFY_WRITE, buffer, count)) {
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
if (!(req = next_complete_req(fi)))
|
|
return -EAGAIN;
|
|
} else {
|
|
/*
|
|
* NB: We call the macro wait_event_interruptible() with a
|
|
* condition argument with side effect. This is only possible
|
|
* because the side effect does not occur until the condition
|
|
* became true, and wait_event_interruptible() won't evaluate
|
|
* the condition again after that.
|
|
*/
|
|
if (wait_event_interruptible(fi->wait_complete,
|
|
(req = next_complete_req(fi))))
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
if (req->req.length) {
|
|
if (copy_to_user(int2ptr(req->req.recvb), req->data,
|
|
req->req.length)) {
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
if (count == sizeof(struct compat_raw1394_req) &&
|
|
sizeof(struct compat_raw1394_req) !=
|
|
sizeof(struct raw1394_request)) {
|
|
ret = raw1394_compat_read(buffer, &req->req);
|
|
} else
|
|
#endif
|
|
{
|
|
if (copy_to_user(buffer, &req->req, sizeof(req->req))) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
ret = (ssize_t) sizeof(struct raw1394_request);
|
|
}
|
|
out:
|
|
free_pending_request(req);
|
|
return ret;
|
|
}
|
|
|
|
static int state_opened(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
if (req->req.type == RAW1394_REQ_INITIALIZE) {
|
|
switch (req->req.misc) {
|
|
case RAW1394_KERNELAPI_VERSION:
|
|
case 3:
|
|
fi->state = initialized;
|
|
fi->protocol_version = req->req.misc;
|
|
req->req.error = RAW1394_ERROR_NONE;
|
|
req->req.generation = atomic_read(&internal_generation);
|
|
break;
|
|
|
|
default:
|
|
req->req.error = RAW1394_ERROR_COMPAT;
|
|
req->req.misc = RAW1394_KERNELAPI_VERSION;
|
|
}
|
|
} else {
|
|
req->req.error = RAW1394_ERROR_STATE_ORDER;
|
|
}
|
|
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
static int state_initialized(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
unsigned long flags;
|
|
struct host_info *hi;
|
|
struct raw1394_khost_list *khl;
|
|
|
|
if (req->req.generation != atomic_read(&internal_generation)) {
|
|
req->req.error = RAW1394_ERROR_GENERATION;
|
|
req->req.generation = atomic_read(&internal_generation);
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
switch (req->req.type) {
|
|
case RAW1394_REQ_LIST_CARDS:
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
khl = kmalloc(sizeof(*khl) * host_count, GFP_ATOMIC);
|
|
|
|
if (khl) {
|
|
req->req.misc = host_count;
|
|
req->data = (quadlet_t *) khl;
|
|
|
|
list_for_each_entry(hi, &host_info_list, list) {
|
|
khl->nodes = hi->host->node_count;
|
|
strcpy(khl->name, hi->host->driver->name);
|
|
khl++;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
|
|
if (khl) {
|
|
req->req.error = RAW1394_ERROR_NONE;
|
|
req->req.length = min(req->req.length,
|
|
(u32) (sizeof
|
|
(struct raw1394_khost_list)
|
|
* req->req.misc));
|
|
req->free_data = 1;
|
|
} else {
|
|
return -ENOMEM;
|
|
}
|
|
break;
|
|
|
|
case RAW1394_REQ_SET_CARD:
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
if (req->req.misc >= host_count) {
|
|
req->req.error = RAW1394_ERROR_INVALID_ARG;
|
|
goto out_set_card;
|
|
}
|
|
list_for_each_entry(hi, &host_info_list, list)
|
|
if (!req->req.misc--)
|
|
break;
|
|
get_device(&hi->host->device); /* FIXME handle failure case */
|
|
list_add_tail(&fi->list, &hi->file_info_list);
|
|
|
|
/* prevent unloading of the host's low-level driver */
|
|
if (!try_module_get(hi->host->driver->owner)) {
|
|
req->req.error = RAW1394_ERROR_ABORTED;
|
|
goto out_set_card;
|
|
}
|
|
WARN_ON(fi->host);
|
|
fi->host = hi->host;
|
|
fi->state = connected;
|
|
|
|
req->req.error = RAW1394_ERROR_NONE;
|
|
req->req.generation = get_hpsb_generation(fi->host);
|
|
req->req.misc = (fi->host->node_id << 16)
|
|
| fi->host->node_count;
|
|
if (fi->protocol_version > 3)
|
|
req->req.misc |= NODEID_TO_NODE(fi->host->irm_id) << 8;
|
|
out_set_card:
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
|
|
req->req.length = 0;
|
|
break;
|
|
|
|
default:
|
|
req->req.error = RAW1394_ERROR_STATE_ORDER;
|
|
req->req.length = 0;
|
|
break;
|
|
}
|
|
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
static void handle_fcp_listen(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
if (req->req.misc) {
|
|
if (fi->fcp_buffer) {
|
|
req->req.error = RAW1394_ERROR_ALREADY;
|
|
} else {
|
|
fi->fcp_buffer = int2ptr(req->req.recvb);
|
|
}
|
|
} else {
|
|
if (!fi->fcp_buffer) {
|
|
req->req.error = RAW1394_ERROR_ALREADY;
|
|
} else {
|
|
fi->fcp_buffer = NULL;
|
|
}
|
|
}
|
|
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
}
|
|
|
|
static int handle_async_request(struct file_info *fi,
|
|
struct pending_request *req, int node)
|
|
{
|
|
unsigned long flags;
|
|
struct hpsb_packet *packet = NULL;
|
|
u64 addr = req->req.address & 0xffffffffffffULL;
|
|
|
|
switch (req->req.type) {
|
|
case RAW1394_REQ_ASYNC_READ:
|
|
DBGMSG("read_request called");
|
|
packet =
|
|
hpsb_make_readpacket(fi->host, node, addr, req->req.length);
|
|
|
|
if (!packet)
|
|
return -ENOMEM;
|
|
|
|
if (req->req.length == 4)
|
|
req->data = &packet->header[3];
|
|
else
|
|
req->data = packet->data;
|
|
|
|
break;
|
|
|
|
case RAW1394_REQ_ASYNC_WRITE:
|
|
DBGMSG("write_request called");
|
|
|
|
packet = hpsb_make_writepacket(fi->host, node, addr, NULL,
|
|
req->req.length);
|
|
if (!packet)
|
|
return -ENOMEM;
|
|
|
|
if (req->req.length == 4) {
|
|
if (copy_from_user
|
|
(&packet->header[3], int2ptr(req->req.sendb),
|
|
req->req.length))
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
} else {
|
|
if (copy_from_user
|
|
(packet->data, int2ptr(req->req.sendb),
|
|
req->req.length))
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
}
|
|
|
|
req->req.length = 0;
|
|
break;
|
|
|
|
case RAW1394_REQ_ASYNC_STREAM:
|
|
DBGMSG("stream_request called");
|
|
|
|
packet =
|
|
hpsb_make_streampacket(fi->host, NULL, req->req.length,
|
|
node & 0x3f /*channel */ ,
|
|
(req->req.misc >> 16) & 0x3,
|
|
req->req.misc & 0xf);
|
|
if (!packet)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(packet->data, int2ptr(req->req.sendb),
|
|
req->req.length))
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
|
|
req->req.length = 0;
|
|
break;
|
|
|
|
case RAW1394_REQ_LOCK:
|
|
DBGMSG("lock_request called");
|
|
if ((req->req.misc == EXTCODE_FETCH_ADD)
|
|
|| (req->req.misc == EXTCODE_LITTLE_ADD)) {
|
|
if (req->req.length != 4) {
|
|
req->req.error = RAW1394_ERROR_INVALID_ARG;
|
|
break;
|
|
}
|
|
} else {
|
|
if (req->req.length != 8) {
|
|
req->req.error = RAW1394_ERROR_INVALID_ARG;
|
|
break;
|
|
}
|
|
}
|
|
|
|
packet = hpsb_make_lockpacket(fi->host, node, addr,
|
|
req->req.misc, NULL, 0);
|
|
if (!packet)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(packet->data, int2ptr(req->req.sendb),
|
|
req->req.length)) {
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
break;
|
|
}
|
|
|
|
req->data = packet->data;
|
|
req->req.length = 4;
|
|
break;
|
|
|
|
case RAW1394_REQ_LOCK64:
|
|
DBGMSG("lock64_request called");
|
|
if ((req->req.misc == EXTCODE_FETCH_ADD)
|
|
|| (req->req.misc == EXTCODE_LITTLE_ADD)) {
|
|
if (req->req.length != 8) {
|
|
req->req.error = RAW1394_ERROR_INVALID_ARG;
|
|
break;
|
|
}
|
|
} else {
|
|
if (req->req.length != 16) {
|
|
req->req.error = RAW1394_ERROR_INVALID_ARG;
|
|
break;
|
|
}
|
|
}
|
|
packet = hpsb_make_lock64packet(fi->host, node, addr,
|
|
req->req.misc, NULL, 0);
|
|
if (!packet)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(packet->data, int2ptr(req->req.sendb),
|
|
req->req.length)) {
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
break;
|
|
}
|
|
|
|
req->data = packet->data;
|
|
req->req.length = 8;
|
|
break;
|
|
|
|
default:
|
|
req->req.error = RAW1394_ERROR_STATE_ORDER;
|
|
}
|
|
|
|
req->packet = packet;
|
|
|
|
if (req->req.error) {
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
hpsb_set_packet_complete_task(packet,
|
|
(void (*)(void *))queue_complete_cb, req);
|
|
|
|
spin_lock_irqsave(&fi->reqlists_lock, flags);
|
|
list_add_tail(&req->list, &fi->req_pending);
|
|
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
|
|
|
|
packet->generation = req->req.generation;
|
|
|
|
if (hpsb_send_packet(packet) < 0) {
|
|
req->req.error = RAW1394_ERROR_SEND_ERROR;
|
|
req->req.length = 0;
|
|
hpsb_free_tlabel(packet);
|
|
queue_complete_req(req);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int handle_async_send(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
unsigned long flags;
|
|
struct hpsb_packet *packet;
|
|
int header_length = req->req.misc & 0xffff;
|
|
int expect_response = req->req.misc >> 16;
|
|
size_t data_size;
|
|
|
|
if (header_length > req->req.length || header_length < 12 ||
|
|
header_length > FIELD_SIZEOF(struct hpsb_packet, header)) {
|
|
req->req.error = RAW1394_ERROR_INVALID_ARG;
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
data_size = req->req.length - header_length;
|
|
packet = hpsb_alloc_packet(data_size);
|
|
req->packet = packet;
|
|
if (!packet)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(packet->header, int2ptr(req->req.sendb),
|
|
header_length)) {
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
if (copy_from_user
|
|
(packet->data, int2ptr(req->req.sendb) + header_length,
|
|
data_size)) {
|
|
req->req.error = RAW1394_ERROR_MEMFAULT;
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
packet->type = hpsb_async;
|
|
packet->node_id = packet->header[0] >> 16;
|
|
packet->tcode = (packet->header[0] >> 4) & 0xf;
|
|
packet->tlabel = (packet->header[0] >> 10) & 0x3f;
|
|
packet->host = fi->host;
|
|
packet->expect_response = expect_response;
|
|
packet->header_size = header_length;
|
|
packet->data_size = data_size;
|
|
|
|
req->req.length = 0;
|
|
hpsb_set_packet_complete_task(packet,
|
|
(void (*)(void *))queue_complete_cb, req);
|
|
|
|
spin_lock_irqsave(&fi->reqlists_lock, flags);
|
|
list_add_tail(&req->list, &fi->req_pending);
|
|
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
|
|
|
|
/* Update the generation of the packet just before sending. */
|
|
packet->generation = req->req.generation;
|
|
|
|
if (hpsb_send_packet(packet) < 0) {
|
|
req->req.error = RAW1394_ERROR_SEND_ERROR;
|
|
queue_complete_req(req);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int arm_read(struct hpsb_host *host, int nodeid, quadlet_t * buffer,
|
|
u64 addr, size_t length, u16 flags)
|
|
{
|
|
unsigned long irqflags;
|
|
struct pending_request *req;
|
|
struct host_info *hi;
|
|
struct file_info *fi = NULL;
|
|
struct list_head *entry;
|
|
struct arm_addr *arm_addr = NULL;
|
|
struct arm_request *arm_req = NULL;
|
|
struct arm_response *arm_resp = NULL;
|
|
int found = 0, size = 0, rcode = -1;
|
|
struct arm_request_response *arm_req_resp = NULL;
|
|
|
|
DBGMSG("arm_read called by node: %X "
|
|
"addr: %4.4x %8.8x length: %Zu", nodeid,
|
|
(u16) ((addr >> 32) & 0xFFFF), (u32) (addr & 0xFFFFFFFF),
|
|
length);
|
|
spin_lock_irqsave(&host_info_lock, irqflags);
|
|
hi = find_host_info(host); /* search address-entry */
|
|
if (hi != NULL) {
|
|
list_for_each_entry(fi, &hi->file_info_list, list) {
|
|
entry = fi->addr_list.next;
|
|
while (entry != &(fi->addr_list)) {
|
|
arm_addr =
|
|
list_entry(entry, struct arm_addr,
|
|
addr_list);
|
|
if (((arm_addr->start) <= (addr))
|
|
&& ((arm_addr->end) >= (addr + length))) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (found) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
rcode = -1;
|
|
if (!found) {
|
|
printk(KERN_ERR "raw1394: arm_read FAILED addr_entry not found"
|
|
" -> rcode_address_error\n");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_ADDRESS_ERROR);
|
|
} else {
|
|
DBGMSG("arm_read addr_entry FOUND");
|
|
}
|
|
if (arm_addr->rec_length < length) {
|
|
DBGMSG("arm_read blocklength too big -> rcode_data_error");
|
|
rcode = RCODE_DATA_ERROR; /* hardware error, data is unavailable */
|
|
}
|
|
if (rcode == -1) {
|
|
if (arm_addr->access_rights & ARM_READ) {
|
|
if (!(arm_addr->client_transactions & ARM_READ)) {
|
|
memcpy(buffer,
|
|
(arm_addr->addr_space_buffer) + (addr -
|
|
(arm_addr->
|
|
start)),
|
|
length);
|
|
DBGMSG("arm_read -> (rcode_complete)");
|
|
rcode = RCODE_COMPLETE;
|
|
}
|
|
} else {
|
|
rcode = RCODE_TYPE_ERROR; /* function not allowed */
|
|
DBGMSG("arm_read -> rcode_type_error (access denied)");
|
|
}
|
|
}
|
|
if (arm_addr->notification_options & ARM_READ) {
|
|
DBGMSG("arm_read -> entering notification-section");
|
|
req = __alloc_pending_request(GFP_ATOMIC);
|
|
if (!req) {
|
|
DBGMSG("arm_read -> rcode_conflict_error");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request may be retried */
|
|
}
|
|
if (rcode == RCODE_COMPLETE) {
|
|
size =
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response) +
|
|
length * sizeof(byte_t) +
|
|
sizeof(struct arm_request_response);
|
|
} else {
|
|
size =
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response) +
|
|
sizeof(struct arm_request_response);
|
|
}
|
|
req->data = kmalloc(size, GFP_ATOMIC);
|
|
if (!(req->data)) {
|
|
free_pending_request(req);
|
|
DBGMSG("arm_read -> rcode_conflict_error");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request may be retried */
|
|
}
|
|
req->free_data = 1;
|
|
req->file_info = fi;
|
|
req->req.type = RAW1394_REQ_ARM;
|
|
req->req.generation = get_hpsb_generation(host);
|
|
req->req.misc =
|
|
(((length << 16) & (0xFFFF0000)) | (ARM_READ & 0xFF));
|
|
req->req.tag = arm_addr->arm_tag;
|
|
req->req.recvb = arm_addr->recvb;
|
|
req->req.length = size;
|
|
arm_req_resp = (struct arm_request_response *)(req->data);
|
|
arm_req = (struct arm_request *)((byte_t *) (req->data) +
|
|
(sizeof
|
|
(struct
|
|
arm_request_response)));
|
|
arm_resp =
|
|
(struct arm_response *)((byte_t *) (arm_req) +
|
|
(sizeof(struct arm_request)));
|
|
arm_req->buffer = NULL;
|
|
arm_resp->buffer = NULL;
|
|
if (rcode == RCODE_COMPLETE) {
|
|
byte_t *buf =
|
|
(byte_t *) arm_resp + sizeof(struct arm_response);
|
|
memcpy(buf,
|
|
(arm_addr->addr_space_buffer) + (addr -
|
|
(arm_addr->
|
|
start)),
|
|
length);
|
|
arm_resp->buffer =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response));
|
|
}
|
|
arm_resp->buffer_length =
|
|
(rcode == RCODE_COMPLETE) ? length : 0;
|
|
arm_resp->response_code = rcode;
|
|
arm_req->buffer_length = 0;
|
|
arm_req->generation = req->req.generation;
|
|
arm_req->extended_transaction_code = 0;
|
|
arm_req->destination_offset = addr;
|
|
arm_req->source_nodeid = nodeid;
|
|
arm_req->destination_nodeid = host->node_id;
|
|
arm_req->tlabel = (flags >> 10) & 0x3f;
|
|
arm_req->tcode = (flags >> 4) & 0x0f;
|
|
arm_req_resp->request = int2ptr((arm_addr->recvb) +
|
|
sizeof(struct
|
|
arm_request_response));
|
|
arm_req_resp->response =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request));
|
|
queue_complete_req(req);
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (rcode);
|
|
}
|
|
|
|
static int arm_write(struct hpsb_host *host, int nodeid, int destid,
|
|
quadlet_t * data, u64 addr, size_t length, u16 flags)
|
|
{
|
|
unsigned long irqflags;
|
|
struct pending_request *req;
|
|
struct host_info *hi;
|
|
struct file_info *fi = NULL;
|
|
struct list_head *entry;
|
|
struct arm_addr *arm_addr = NULL;
|
|
struct arm_request *arm_req = NULL;
|
|
struct arm_response *arm_resp = NULL;
|
|
int found = 0, size = 0, rcode = -1, length_conflict = 0;
|
|
struct arm_request_response *arm_req_resp = NULL;
|
|
|
|
DBGMSG("arm_write called by node: %X "
|
|
"addr: %4.4x %8.8x length: %Zu", nodeid,
|
|
(u16) ((addr >> 32) & 0xFFFF), (u32) (addr & 0xFFFFFFFF),
|
|
length);
|
|
spin_lock_irqsave(&host_info_lock, irqflags);
|
|
hi = find_host_info(host); /* search address-entry */
|
|
if (hi != NULL) {
|
|
list_for_each_entry(fi, &hi->file_info_list, list) {
|
|
entry = fi->addr_list.next;
|
|
while (entry != &(fi->addr_list)) {
|
|
arm_addr =
|
|
list_entry(entry, struct arm_addr,
|
|
addr_list);
|
|
if (((arm_addr->start) <= (addr))
|
|
&& ((arm_addr->end) >= (addr + length))) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (found) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
rcode = -1;
|
|
if (!found) {
|
|
printk(KERN_ERR "raw1394: arm_write FAILED addr_entry not found"
|
|
" -> rcode_address_error\n");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_ADDRESS_ERROR);
|
|
} else {
|
|
DBGMSG("arm_write addr_entry FOUND");
|
|
}
|
|
if (arm_addr->rec_length < length) {
|
|
DBGMSG("arm_write blocklength too big -> rcode_data_error");
|
|
length_conflict = 1;
|
|
rcode = RCODE_DATA_ERROR; /* hardware error, data is unavailable */
|
|
}
|
|
if (rcode == -1) {
|
|
if (arm_addr->access_rights & ARM_WRITE) {
|
|
if (!(arm_addr->client_transactions & ARM_WRITE)) {
|
|
memcpy((arm_addr->addr_space_buffer) +
|
|
(addr - (arm_addr->start)), data,
|
|
length);
|
|
DBGMSG("arm_write -> (rcode_complete)");
|
|
rcode = RCODE_COMPLETE;
|
|
}
|
|
} else {
|
|
rcode = RCODE_TYPE_ERROR; /* function not allowed */
|
|
DBGMSG("arm_write -> rcode_type_error (access denied)");
|
|
}
|
|
}
|
|
if (arm_addr->notification_options & ARM_WRITE) {
|
|
DBGMSG("arm_write -> entering notification-section");
|
|
req = __alloc_pending_request(GFP_ATOMIC);
|
|
if (!req) {
|
|
DBGMSG("arm_write -> rcode_conflict_error");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request my be retried */
|
|
}
|
|
size =
|
|
sizeof(struct arm_request) + sizeof(struct arm_response) +
|
|
(length) * sizeof(byte_t) +
|
|
sizeof(struct arm_request_response);
|
|
req->data = kmalloc(size, GFP_ATOMIC);
|
|
if (!(req->data)) {
|
|
free_pending_request(req);
|
|
DBGMSG("arm_write -> rcode_conflict_error");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request may be retried */
|
|
}
|
|
req->free_data = 1;
|
|
req->file_info = fi;
|
|
req->req.type = RAW1394_REQ_ARM;
|
|
req->req.generation = get_hpsb_generation(host);
|
|
req->req.misc =
|
|
(((length << 16) & (0xFFFF0000)) | (ARM_WRITE & 0xFF));
|
|
req->req.tag = arm_addr->arm_tag;
|
|
req->req.recvb = arm_addr->recvb;
|
|
req->req.length = size;
|
|
arm_req_resp = (struct arm_request_response *)(req->data);
|
|
arm_req = (struct arm_request *)((byte_t *) (req->data) +
|
|
(sizeof
|
|
(struct
|
|
arm_request_response)));
|
|
arm_resp =
|
|
(struct arm_response *)((byte_t *) (arm_req) +
|
|
(sizeof(struct arm_request)));
|
|
arm_resp->buffer = NULL;
|
|
memcpy((byte_t *) arm_resp + sizeof(struct arm_response),
|
|
data, length);
|
|
arm_req->buffer = int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response));
|
|
arm_req->buffer_length = length;
|
|
arm_req->generation = req->req.generation;
|
|
arm_req->extended_transaction_code = 0;
|
|
arm_req->destination_offset = addr;
|
|
arm_req->source_nodeid = nodeid;
|
|
arm_req->destination_nodeid = destid;
|
|
arm_req->tlabel = (flags >> 10) & 0x3f;
|
|
arm_req->tcode = (flags >> 4) & 0x0f;
|
|
arm_resp->buffer_length = 0;
|
|
arm_resp->response_code = rcode;
|
|
arm_req_resp->request = int2ptr((arm_addr->recvb) +
|
|
sizeof(struct
|
|
arm_request_response));
|
|
arm_req_resp->response =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request));
|
|
queue_complete_req(req);
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (rcode);
|
|
}
|
|
|
|
static int arm_lock(struct hpsb_host *host, int nodeid, quadlet_t * store,
|
|
u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
|
|
u16 flags)
|
|
{
|
|
unsigned long irqflags;
|
|
struct pending_request *req;
|
|
struct host_info *hi;
|
|
struct file_info *fi = NULL;
|
|
struct list_head *entry;
|
|
struct arm_addr *arm_addr = NULL;
|
|
struct arm_request *arm_req = NULL;
|
|
struct arm_response *arm_resp = NULL;
|
|
int found = 0, size = 0, rcode = -1;
|
|
quadlet_t old, new;
|
|
struct arm_request_response *arm_req_resp = NULL;
|
|
|
|
if (((ext_tcode & 0xFF) == EXTCODE_FETCH_ADD) ||
|
|
((ext_tcode & 0xFF) == EXTCODE_LITTLE_ADD)) {
|
|
DBGMSG("arm_lock called by node: %X "
|
|
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X",
|
|
nodeid, (u16) ((addr >> 32) & 0xFFFF),
|
|
(u32) (addr & 0xFFFFFFFF), ext_tcode & 0xFF,
|
|
be32_to_cpu(data));
|
|
} else {
|
|
DBGMSG("arm_lock called by node: %X "
|
|
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X arg: %8.8X",
|
|
nodeid, (u16) ((addr >> 32) & 0xFFFF),
|
|
(u32) (addr & 0xFFFFFFFF), ext_tcode & 0xFF,
|
|
be32_to_cpu(data), be32_to_cpu(arg));
|
|
}
|
|
spin_lock_irqsave(&host_info_lock, irqflags);
|
|
hi = find_host_info(host); /* search address-entry */
|
|
if (hi != NULL) {
|
|
list_for_each_entry(fi, &hi->file_info_list, list) {
|
|
entry = fi->addr_list.next;
|
|
while (entry != &(fi->addr_list)) {
|
|
arm_addr =
|
|
list_entry(entry, struct arm_addr,
|
|
addr_list);
|
|
if (((arm_addr->start) <= (addr))
|
|
&& ((arm_addr->end) >=
|
|
(addr + sizeof(*store)))) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (found) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
rcode = -1;
|
|
if (!found) {
|
|
printk(KERN_ERR "raw1394: arm_lock FAILED addr_entry not found"
|
|
" -> rcode_address_error\n");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_ADDRESS_ERROR);
|
|
} else {
|
|
DBGMSG("arm_lock addr_entry FOUND");
|
|
}
|
|
if (rcode == -1) {
|
|
if (arm_addr->access_rights & ARM_LOCK) {
|
|
if (!(arm_addr->client_transactions & ARM_LOCK)) {
|
|
memcpy(&old,
|
|
(arm_addr->addr_space_buffer) + (addr -
|
|
(arm_addr->
|
|
start)),
|
|
sizeof(old));
|
|
switch (ext_tcode) {
|
|
case (EXTCODE_MASK_SWAP):
|
|
new = data | (old & ~arg);
|
|
break;
|
|
case (EXTCODE_COMPARE_SWAP):
|
|
if (old == arg) {
|
|
new = data;
|
|
} else {
|
|
new = old;
|
|
}
|
|
break;
|
|
case (EXTCODE_FETCH_ADD):
|
|
new =
|
|
cpu_to_be32(be32_to_cpu(data) +
|
|
be32_to_cpu(old));
|
|
break;
|
|
case (EXTCODE_LITTLE_ADD):
|
|
new =
|
|
cpu_to_le32(le32_to_cpu(data) +
|
|
le32_to_cpu(old));
|
|
break;
|
|
case (EXTCODE_BOUNDED_ADD):
|
|
if (old != arg) {
|
|
new =
|
|
cpu_to_be32(be32_to_cpu
|
|
(data) +
|
|
be32_to_cpu
|
|
(old));
|
|
} else {
|
|
new = old;
|
|
}
|
|
break;
|
|
case (EXTCODE_WRAP_ADD):
|
|
if (old != arg) {
|
|
new =
|
|
cpu_to_be32(be32_to_cpu
|
|
(data) +
|
|
be32_to_cpu
|
|
(old));
|
|
} else {
|
|
new = data;
|
|
}
|
|
break;
|
|
default:
|
|
rcode = RCODE_TYPE_ERROR; /* function not allowed */
|
|
printk(KERN_ERR
|
|
"raw1394: arm_lock FAILED "
|
|
"ext_tcode not allowed -> rcode_type_error\n");
|
|
break;
|
|
} /*switch */
|
|
if (rcode == -1) {
|
|
DBGMSG("arm_lock -> (rcode_complete)");
|
|
rcode = RCODE_COMPLETE;
|
|
memcpy(store, &old, sizeof(*store));
|
|
memcpy((arm_addr->addr_space_buffer) +
|
|
(addr - (arm_addr->start)),
|
|
&new, sizeof(*store));
|
|
}
|
|
}
|
|
} else {
|
|
rcode = RCODE_TYPE_ERROR; /* function not allowed */
|
|
DBGMSG("arm_lock -> rcode_type_error (access denied)");
|
|
}
|
|
}
|
|
if (arm_addr->notification_options & ARM_LOCK) {
|
|
byte_t *buf1, *buf2;
|
|
DBGMSG("arm_lock -> entering notification-section");
|
|
req = __alloc_pending_request(GFP_ATOMIC);
|
|
if (!req) {
|
|
DBGMSG("arm_lock -> rcode_conflict_error");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request may be retried */
|
|
}
|
|
size = sizeof(struct arm_request) + sizeof(struct arm_response) + 3 * sizeof(*store) + sizeof(struct arm_request_response); /* maximum */
|
|
req->data = kmalloc(size, GFP_ATOMIC);
|
|
if (!(req->data)) {
|
|
free_pending_request(req);
|
|
DBGMSG("arm_lock -> rcode_conflict_error");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request may be retried */
|
|
}
|
|
req->free_data = 1;
|
|
arm_req_resp = (struct arm_request_response *)(req->data);
|
|
arm_req = (struct arm_request *)((byte_t *) (req->data) +
|
|
(sizeof
|
|
(struct
|
|
arm_request_response)));
|
|
arm_resp =
|
|
(struct arm_response *)((byte_t *) (arm_req) +
|
|
(sizeof(struct arm_request)));
|
|
buf1 = (byte_t *) arm_resp + sizeof(struct arm_response);
|
|
buf2 = buf1 + 2 * sizeof(*store);
|
|
if ((ext_tcode == EXTCODE_FETCH_ADD) ||
|
|
(ext_tcode == EXTCODE_LITTLE_ADD)) {
|
|
arm_req->buffer_length = sizeof(*store);
|
|
memcpy(buf1, &data, sizeof(*store));
|
|
|
|
} else {
|
|
arm_req->buffer_length = 2 * sizeof(*store);
|
|
memcpy(buf1, &arg, sizeof(*store));
|
|
memcpy(buf1 + sizeof(*store), &data, sizeof(*store));
|
|
}
|
|
if (rcode == RCODE_COMPLETE) {
|
|
arm_resp->buffer_length = sizeof(*store);
|
|
memcpy(buf2, &old, sizeof(*store));
|
|
} else {
|
|
arm_resp->buffer_length = 0;
|
|
}
|
|
req->file_info = fi;
|
|
req->req.type = RAW1394_REQ_ARM;
|
|
req->req.generation = get_hpsb_generation(host);
|
|
req->req.misc = ((((sizeof(*store)) << 16) & (0xFFFF0000)) |
|
|
(ARM_LOCK & 0xFF));
|
|
req->req.tag = arm_addr->arm_tag;
|
|
req->req.recvb = arm_addr->recvb;
|
|
req->req.length = size;
|
|
arm_req->generation = req->req.generation;
|
|
arm_req->extended_transaction_code = ext_tcode;
|
|
arm_req->destination_offset = addr;
|
|
arm_req->source_nodeid = nodeid;
|
|
arm_req->destination_nodeid = host->node_id;
|
|
arm_req->tlabel = (flags >> 10) & 0x3f;
|
|
arm_req->tcode = (flags >> 4) & 0x0f;
|
|
arm_resp->response_code = rcode;
|
|
arm_req_resp->request = int2ptr((arm_addr->recvb) +
|
|
sizeof(struct
|
|
arm_request_response));
|
|
arm_req_resp->response =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request));
|
|
arm_req->buffer =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response));
|
|
arm_resp->buffer =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response) + 2 * sizeof(*store));
|
|
queue_complete_req(req);
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (rcode);
|
|
}
|
|
|
|
static int arm_lock64(struct hpsb_host *host, int nodeid, octlet_t * store,
|
|
u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
|
|
u16 flags)
|
|
{
|
|
unsigned long irqflags;
|
|
struct pending_request *req;
|
|
struct host_info *hi;
|
|
struct file_info *fi = NULL;
|
|
struct list_head *entry;
|
|
struct arm_addr *arm_addr = NULL;
|
|
struct arm_request *arm_req = NULL;
|
|
struct arm_response *arm_resp = NULL;
|
|
int found = 0, size = 0, rcode = -1;
|
|
octlet_t old, new;
|
|
struct arm_request_response *arm_req_resp = NULL;
|
|
|
|
if (((ext_tcode & 0xFF) == EXTCODE_FETCH_ADD) ||
|
|
((ext_tcode & 0xFF) == EXTCODE_LITTLE_ADD)) {
|
|
DBGMSG("arm_lock64 called by node: %X "
|
|
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X %8.8X ",
|
|
nodeid, (u16) ((addr >> 32) & 0xFFFF),
|
|
(u32) (addr & 0xFFFFFFFF),
|
|
ext_tcode & 0xFF,
|
|
(u32) ((be64_to_cpu(data) >> 32) & 0xFFFFFFFF),
|
|
(u32) (be64_to_cpu(data) & 0xFFFFFFFF));
|
|
} else {
|
|
DBGMSG("arm_lock64 called by node: %X "
|
|
"addr: %4.4x %8.8x extcode: %2.2X data: %8.8X %8.8X arg: "
|
|
"%8.8X %8.8X ",
|
|
nodeid, (u16) ((addr >> 32) & 0xFFFF),
|
|
(u32) (addr & 0xFFFFFFFF),
|
|
ext_tcode & 0xFF,
|
|
(u32) ((be64_to_cpu(data) >> 32) & 0xFFFFFFFF),
|
|
(u32) (be64_to_cpu(data) & 0xFFFFFFFF),
|
|
(u32) ((be64_to_cpu(arg) >> 32) & 0xFFFFFFFF),
|
|
(u32) (be64_to_cpu(arg) & 0xFFFFFFFF));
|
|
}
|
|
spin_lock_irqsave(&host_info_lock, irqflags);
|
|
hi = find_host_info(host); /* search addressentry in file_info's for host */
|
|
if (hi != NULL) {
|
|
list_for_each_entry(fi, &hi->file_info_list, list) {
|
|
entry = fi->addr_list.next;
|
|
while (entry != &(fi->addr_list)) {
|
|
arm_addr =
|
|
list_entry(entry, struct arm_addr,
|
|
addr_list);
|
|
if (((arm_addr->start) <= (addr))
|
|
&& ((arm_addr->end) >=
|
|
(addr + sizeof(*store)))) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (found) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
rcode = -1;
|
|
if (!found) {
|
|
printk(KERN_ERR
|
|
"raw1394: arm_lock64 FAILED addr_entry not found"
|
|
" -> rcode_address_error\n");
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (RCODE_ADDRESS_ERROR);
|
|
} else {
|
|
DBGMSG("arm_lock64 addr_entry FOUND");
|
|
}
|
|
if (rcode == -1) {
|
|
if (arm_addr->access_rights & ARM_LOCK) {
|
|
if (!(arm_addr->client_transactions & ARM_LOCK)) {
|
|
memcpy(&old,
|
|
(arm_addr->addr_space_buffer) + (addr -
|
|
(arm_addr->
|
|
start)),
|
|
sizeof(old));
|
|
switch (ext_tcode) {
|
|
case (EXTCODE_MASK_SWAP):
|
|
new = data | (old & ~arg);
|
|
break;
|
|
case (EXTCODE_COMPARE_SWAP):
|
|
if (old == arg) {
|
|
new = data;
|
|
} else {
|
|
new = old;
|
|
}
|
|
break;
|
|
case (EXTCODE_FETCH_ADD):
|
|
new =
|
|
cpu_to_be64(be64_to_cpu(data) +
|
|
be64_to_cpu(old));
|
|
break;
|
|
case (EXTCODE_LITTLE_ADD):
|
|
new =
|
|
cpu_to_le64(le64_to_cpu(data) +
|
|
le64_to_cpu(old));
|
|
break;
|
|
case (EXTCODE_BOUNDED_ADD):
|
|
if (old != arg) {
|
|
new =
|
|
cpu_to_be64(be64_to_cpu
|
|
(data) +
|
|
be64_to_cpu
|
|
(old));
|
|
} else {
|
|
new = old;
|
|
}
|
|
break;
|
|
case (EXTCODE_WRAP_ADD):
|
|
if (old != arg) {
|
|
new =
|
|
cpu_to_be64(be64_to_cpu
|
|
(data) +
|
|
be64_to_cpu
|
|
(old));
|
|
} else {
|
|
new = data;
|
|
}
|
|
break;
|
|
default:
|
|
printk(KERN_ERR
|
|
"raw1394: arm_lock64 FAILED "
|
|
"ext_tcode not allowed -> rcode_type_error\n");
|
|
rcode = RCODE_TYPE_ERROR; /* function not allowed */
|
|
break;
|
|
} /*switch */
|
|
if (rcode == -1) {
|
|
DBGMSG
|
|
("arm_lock64 -> (rcode_complete)");
|
|
rcode = RCODE_COMPLETE;
|
|
memcpy(store, &old, sizeof(*store));
|
|
memcpy((arm_addr->addr_space_buffer) +
|
|
(addr - (arm_addr->start)),
|
|
&new, sizeof(*store));
|
|
}
|
|
}
|
|
} else {
|
|
rcode = RCODE_TYPE_ERROR; /* function not allowed */
|
|
DBGMSG
|
|
("arm_lock64 -> rcode_type_error (access denied)");
|
|
}
|
|
}
|
|
if (arm_addr->notification_options & ARM_LOCK) {
|
|
byte_t *buf1, *buf2;
|
|
DBGMSG("arm_lock64 -> entering notification-section");
|
|
req = __alloc_pending_request(GFP_ATOMIC);
|
|
if (!req) {
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
DBGMSG("arm_lock64 -> rcode_conflict_error");
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request may be retried */
|
|
}
|
|
size = sizeof(struct arm_request) + sizeof(struct arm_response) + 3 * sizeof(*store) + sizeof(struct arm_request_response); /* maximum */
|
|
req->data = kmalloc(size, GFP_ATOMIC);
|
|
if (!(req->data)) {
|
|
free_pending_request(req);
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
DBGMSG("arm_lock64 -> rcode_conflict_error");
|
|
return (RCODE_CONFLICT_ERROR); /* A resource conflict was detected.
|
|
The request may be retried */
|
|
}
|
|
req->free_data = 1;
|
|
arm_req_resp = (struct arm_request_response *)(req->data);
|
|
arm_req = (struct arm_request *)((byte_t *) (req->data) +
|
|
(sizeof
|
|
(struct
|
|
arm_request_response)));
|
|
arm_resp =
|
|
(struct arm_response *)((byte_t *) (arm_req) +
|
|
(sizeof(struct arm_request)));
|
|
buf1 = (byte_t *) arm_resp + sizeof(struct arm_response);
|
|
buf2 = buf1 + 2 * sizeof(*store);
|
|
if ((ext_tcode == EXTCODE_FETCH_ADD) ||
|
|
(ext_tcode == EXTCODE_LITTLE_ADD)) {
|
|
arm_req->buffer_length = sizeof(*store);
|
|
memcpy(buf1, &data, sizeof(*store));
|
|
|
|
} else {
|
|
arm_req->buffer_length = 2 * sizeof(*store);
|
|
memcpy(buf1, &arg, sizeof(*store));
|
|
memcpy(buf1 + sizeof(*store), &data, sizeof(*store));
|
|
}
|
|
if (rcode == RCODE_COMPLETE) {
|
|
arm_resp->buffer_length = sizeof(*store);
|
|
memcpy(buf2, &old, sizeof(*store));
|
|
} else {
|
|
arm_resp->buffer_length = 0;
|
|
}
|
|
req->file_info = fi;
|
|
req->req.type = RAW1394_REQ_ARM;
|
|
req->req.generation = get_hpsb_generation(host);
|
|
req->req.misc = ((((sizeof(*store)) << 16) & (0xFFFF0000)) |
|
|
(ARM_LOCK & 0xFF));
|
|
req->req.tag = arm_addr->arm_tag;
|
|
req->req.recvb = arm_addr->recvb;
|
|
req->req.length = size;
|
|
arm_req->generation = req->req.generation;
|
|
arm_req->extended_transaction_code = ext_tcode;
|
|
arm_req->destination_offset = addr;
|
|
arm_req->source_nodeid = nodeid;
|
|
arm_req->destination_nodeid = host->node_id;
|
|
arm_req->tlabel = (flags >> 10) & 0x3f;
|
|
arm_req->tcode = (flags >> 4) & 0x0f;
|
|
arm_resp->response_code = rcode;
|
|
arm_req_resp->request = int2ptr((arm_addr->recvb) +
|
|
sizeof(struct
|
|
arm_request_response));
|
|
arm_req_resp->response =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request));
|
|
arm_req->buffer =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response));
|
|
arm_resp->buffer =
|
|
int2ptr((arm_addr->recvb) +
|
|
sizeof(struct arm_request_response) +
|
|
sizeof(struct arm_request) +
|
|
sizeof(struct arm_response) + 2 * sizeof(*store));
|
|
queue_complete_req(req);
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, irqflags);
|
|
return (rcode);
|
|
}
|
|
|
|
static int arm_register(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
int retval;
|
|
struct arm_addr *addr;
|
|
struct host_info *hi;
|
|
struct file_info *fi_hlp = NULL;
|
|
struct list_head *entry;
|
|
struct arm_addr *arm_addr = NULL;
|
|
int same_host, another_host;
|
|
unsigned long flags;
|
|
|
|
DBGMSG("arm_register called "
|
|
"addr(Offset): %8.8x %8.8x length: %u "
|
|
"rights: %2.2X notify: %2.2X "
|
|
"max_blk_len: %4.4X",
|
|
(u32) ((req->req.address >> 32) & 0xFFFF),
|
|
(u32) (req->req.address & 0xFFFFFFFF),
|
|
req->req.length, ((req->req.misc >> 8) & 0xFF),
|
|
(req->req.misc & 0xFF), ((req->req.misc >> 16) & 0xFFFF));
|
|
/* check addressrange */
|
|
if ((((req->req.address) & ~(0xFFFFFFFFFFFFULL)) != 0) ||
|
|
(((req->req.address + req->req.length) & ~(0xFFFFFFFFFFFFULL)) !=
|
|
0)) {
|
|
req->req.length = 0;
|
|
return (-EINVAL);
|
|
}
|
|
/* addr-list-entry for fileinfo */
|
|
addr = kmalloc(sizeof(*addr), GFP_KERNEL);
|
|
if (!addr) {
|
|
req->req.length = 0;
|
|
return (-ENOMEM);
|
|
}
|
|
/* allocation of addr_space_buffer */
|
|
addr->addr_space_buffer = vmalloc(req->req.length);
|
|
if (!(addr->addr_space_buffer)) {
|
|
kfree(addr);
|
|
req->req.length = 0;
|
|
return (-ENOMEM);
|
|
}
|
|
/* initialization of addr_space_buffer */
|
|
if ((req->req.sendb) == (unsigned long)NULL) {
|
|
/* init: set 0 */
|
|
memset(addr->addr_space_buffer, 0, req->req.length);
|
|
} else {
|
|
/* init: user -> kernel */
|
|
if (copy_from_user
|
|
(addr->addr_space_buffer, int2ptr(req->req.sendb),
|
|
req->req.length)) {
|
|
vfree(addr->addr_space_buffer);
|
|
kfree(addr);
|
|
return (-EFAULT);
|
|
}
|
|
}
|
|
INIT_LIST_HEAD(&addr->addr_list);
|
|
addr->arm_tag = req->req.tag;
|
|
addr->start = req->req.address;
|
|
addr->end = req->req.address + req->req.length;
|
|
addr->access_rights = (u8) (req->req.misc & 0x0F);
|
|
addr->notification_options = (u8) ((req->req.misc >> 4) & 0x0F);
|
|
addr->client_transactions = (u8) ((req->req.misc >> 8) & 0x0F);
|
|
addr->access_rights |= addr->client_transactions;
|
|
addr->notification_options |= addr->client_transactions;
|
|
addr->recvb = req->req.recvb;
|
|
addr->rec_length = (u16) ((req->req.misc >> 16) & 0xFFFF);
|
|
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
hi = find_host_info(fi->host);
|
|
same_host = 0;
|
|
another_host = 0;
|
|
/* same host with address-entry containing same addressrange ? */
|
|
list_for_each_entry(fi_hlp, &hi->file_info_list, list) {
|
|
entry = fi_hlp->addr_list.next;
|
|
while (entry != &(fi_hlp->addr_list)) {
|
|
arm_addr =
|
|
list_entry(entry, struct arm_addr, addr_list);
|
|
if ((arm_addr->start == addr->start)
|
|
&& (arm_addr->end == addr->end)) {
|
|
DBGMSG("same host ownes same "
|
|
"addressrange -> EALREADY");
|
|
same_host = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (same_host) {
|
|
break;
|
|
}
|
|
}
|
|
if (same_host) {
|
|
/* addressrange occupied by same host */
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
vfree(addr->addr_space_buffer);
|
|
kfree(addr);
|
|
return (-EALREADY);
|
|
}
|
|
/* another host with valid address-entry containing same addressrange */
|
|
list_for_each_entry(hi, &host_info_list, list) {
|
|
if (hi->host != fi->host) {
|
|
list_for_each_entry(fi_hlp, &hi->file_info_list, list) {
|
|
entry = fi_hlp->addr_list.next;
|
|
while (entry != &(fi_hlp->addr_list)) {
|
|
arm_addr =
|
|
list_entry(entry, struct arm_addr,
|
|
addr_list);
|
|
if ((arm_addr->start == addr->start)
|
|
&& (arm_addr->end == addr->end)) {
|
|
DBGMSG
|
|
("another host ownes same "
|
|
"addressrange");
|
|
another_host = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (another_host) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
|
|
if (another_host) {
|
|
DBGMSG("another hosts entry is valid -> SUCCESS");
|
|
if (copy_to_user(int2ptr(req->req.recvb),
|
|
&addr->start, sizeof(u64))) {
|
|
printk(KERN_ERR "raw1394: arm_register failed "
|
|
" address-range-entry is invalid -> EFAULT !!!\n");
|
|
vfree(addr->addr_space_buffer);
|
|
kfree(addr);
|
|
return (-EFAULT);
|
|
}
|
|
free_pending_request(req); /* immediate success or fail */
|
|
/* INSERT ENTRY */
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
list_add_tail(&addr->addr_list, &fi->addr_list);
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
return 0;
|
|
}
|
|
retval =
|
|
hpsb_register_addrspace(&raw1394_highlevel, fi->host, &arm_ops,
|
|
req->req.address,
|
|
req->req.address + req->req.length);
|
|
if (retval) {
|
|
/* INSERT ENTRY */
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
list_add_tail(&addr->addr_list, &fi->addr_list);
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
} else {
|
|
DBGMSG("arm_register failed errno: %d \n", retval);
|
|
vfree(addr->addr_space_buffer);
|
|
kfree(addr);
|
|
return (-EALREADY);
|
|
}
|
|
free_pending_request(req); /* immediate success or fail */
|
|
return 0;
|
|
}
|
|
|
|
static int arm_unregister(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
int found = 0;
|
|
int retval = 0;
|
|
struct list_head *entry;
|
|
struct arm_addr *addr = NULL;
|
|
struct host_info *hi;
|
|
struct file_info *fi_hlp = NULL;
|
|
struct arm_addr *arm_addr = NULL;
|
|
int another_host;
|
|
unsigned long flags;
|
|
|
|
DBGMSG("arm_Unregister called addr(Offset): "
|
|
"%8.8x %8.8x",
|
|
(u32) ((req->req.address >> 32) & 0xFFFF),
|
|
(u32) (req->req.address & 0xFFFFFFFF));
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
/* get addr */
|
|
entry = fi->addr_list.next;
|
|
while (entry != &(fi->addr_list)) {
|
|
addr = list_entry(entry, struct arm_addr, addr_list);
|
|
if (addr->start == req->req.address) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (!found) {
|
|
DBGMSG("arm_Unregister addr not found");
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
return (-EINVAL);
|
|
}
|
|
DBGMSG("arm_Unregister addr found");
|
|
another_host = 0;
|
|
/* another host with valid address-entry containing
|
|
same addressrange */
|
|
list_for_each_entry(hi, &host_info_list, list) {
|
|
if (hi->host != fi->host) {
|
|
list_for_each_entry(fi_hlp, &hi->file_info_list, list) {
|
|
entry = fi_hlp->addr_list.next;
|
|
while (entry != &(fi_hlp->addr_list)) {
|
|
arm_addr = list_entry(entry,
|
|
struct arm_addr,
|
|
addr_list);
|
|
if (arm_addr->start == addr->start) {
|
|
DBGMSG("another host ownes "
|
|
"same addressrange");
|
|
another_host = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (another_host) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (another_host) {
|
|
DBGMSG("delete entry from list -> success");
|
|
list_del(&addr->addr_list);
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
vfree(addr->addr_space_buffer);
|
|
kfree(addr);
|
|
free_pending_request(req); /* immediate success or fail */
|
|
return 0;
|
|
}
|
|
retval =
|
|
hpsb_unregister_addrspace(&raw1394_highlevel, fi->host,
|
|
addr->start);
|
|
if (!retval) {
|
|
printk(KERN_ERR "raw1394: arm_Unregister failed -> EINVAL\n");
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
return (-EINVAL);
|
|
}
|
|
DBGMSG("delete entry from list -> success");
|
|
list_del(&addr->addr_list);
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
vfree(addr->addr_space_buffer);
|
|
kfree(addr);
|
|
free_pending_request(req); /* immediate success or fail */
|
|
return 0;
|
|
}
|
|
|
|
/* Copy data from ARM buffer(s) to user buffer. */
|
|
static int arm_get_buf(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
struct arm_addr *arm_addr = NULL;
|
|
unsigned long flags;
|
|
unsigned long offset;
|
|
|
|
struct list_head *entry;
|
|
|
|
DBGMSG("arm_get_buf "
|
|
"addr(Offset): %04X %08X length: %u",
|
|
(u32) ((req->req.address >> 32) & 0xFFFF),
|
|
(u32) (req->req.address & 0xFFFFFFFF), (u32) req->req.length);
|
|
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
entry = fi->addr_list.next;
|
|
while (entry != &(fi->addr_list)) {
|
|
arm_addr = list_entry(entry, struct arm_addr, addr_list);
|
|
if ((arm_addr->start <= req->req.address) &&
|
|
(arm_addr->end > req->req.address)) {
|
|
if (req->req.address + req->req.length <= arm_addr->end) {
|
|
offset = req->req.address - arm_addr->start;
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
|
|
DBGMSG
|
|
("arm_get_buf copy_to_user( %08X, %p, %u )",
|
|
(u32) req->req.recvb,
|
|
arm_addr->addr_space_buffer + offset,
|
|
(u32) req->req.length);
|
|
if (copy_to_user
|
|
(int2ptr(req->req.recvb),
|
|
arm_addr->addr_space_buffer + offset,
|
|
req->req.length))
|
|
return (-EFAULT);
|
|
|
|
/* We have to free the request, because we
|
|
* queue no response, and therefore nobody
|
|
* will free it. */
|
|
free_pending_request(req);
|
|
return 0;
|
|
} else {
|
|
DBGMSG("arm_get_buf request exceeded mapping");
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
return (-EINVAL);
|
|
}
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
return (-EINVAL);
|
|
}
|
|
|
|
/* Copy data from user buffer to ARM buffer(s). */
|
|
static int arm_set_buf(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
struct arm_addr *arm_addr = NULL;
|
|
unsigned long flags;
|
|
unsigned long offset;
|
|
|
|
struct list_head *entry;
|
|
|
|
DBGMSG("arm_set_buf "
|
|
"addr(Offset): %04X %08X length: %u",
|
|
(u32) ((req->req.address >> 32) & 0xFFFF),
|
|
(u32) (req->req.address & 0xFFFFFFFF), (u32) req->req.length);
|
|
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
entry = fi->addr_list.next;
|
|
while (entry != &(fi->addr_list)) {
|
|
arm_addr = list_entry(entry, struct arm_addr, addr_list);
|
|
if ((arm_addr->start <= req->req.address) &&
|
|
(arm_addr->end > req->req.address)) {
|
|
if (req->req.address + req->req.length <= arm_addr->end) {
|
|
offset = req->req.address - arm_addr->start;
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
|
|
DBGMSG
|
|
("arm_set_buf copy_from_user( %p, %08X, %u )",
|
|
arm_addr->addr_space_buffer + offset,
|
|
(u32) req->req.sendb,
|
|
(u32) req->req.length);
|
|
if (copy_from_user
|
|
(arm_addr->addr_space_buffer + offset,
|
|
int2ptr(req->req.sendb),
|
|
req->req.length))
|
|
return (-EFAULT);
|
|
|
|
/* We have to free the request, because we
|
|
* queue no response, and therefore nobody
|
|
* will free it. */
|
|
free_pending_request(req);
|
|
return 0;
|
|
} else {
|
|
DBGMSG("arm_set_buf request exceeded mapping");
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
return (-EINVAL);
|
|
}
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
return (-EINVAL);
|
|
}
|
|
|
|
static int reset_notification(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
DBGMSG("reset_notification called - switch %s ",
|
|
(req->req.misc == RAW1394_NOTIFY_OFF) ? "OFF" : "ON");
|
|
if ((req->req.misc == RAW1394_NOTIFY_OFF) ||
|
|
(req->req.misc == RAW1394_NOTIFY_ON)) {
|
|
fi->notification = (u8) req->req.misc;
|
|
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
|
|
return 0;
|
|
}
|
|
/* error EINVAL (22) invalid argument */
|
|
return (-EINVAL);
|
|
}
|
|
|
|
static int write_phypacket(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
struct hpsb_packet *packet = NULL;
|
|
int retval = 0;
|
|
quadlet_t data;
|
|
unsigned long flags;
|
|
|
|
data = be32_to_cpu((u32) req->req.sendb);
|
|
DBGMSG("write_phypacket called - quadlet 0x%8.8x ", data);
|
|
packet = hpsb_make_phypacket(fi->host, data);
|
|
if (!packet)
|
|
return -ENOMEM;
|
|
req->req.length = 0;
|
|
req->packet = packet;
|
|
hpsb_set_packet_complete_task(packet,
|
|
(void (*)(void *))queue_complete_cb, req);
|
|
spin_lock_irqsave(&fi->reqlists_lock, flags);
|
|
list_add_tail(&req->list, &fi->req_pending);
|
|
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
|
|
packet->generation = req->req.generation;
|
|
retval = hpsb_send_packet(packet);
|
|
DBGMSG("write_phypacket send_packet called => retval: %d ", retval);
|
|
if (retval < 0) {
|
|
req->req.error = RAW1394_ERROR_SEND_ERROR;
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int get_config_rom(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
int ret = 0;
|
|
quadlet_t *data = kmalloc(req->req.length, GFP_KERNEL);
|
|
int status;
|
|
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
status =
|
|
csr1212_read(fi->host->csr.rom, CSR1212_CONFIG_ROM_SPACE_OFFSET,
|
|
data, req->req.length);
|
|
if (copy_to_user(int2ptr(req->req.recvb), data, req->req.length))
|
|
ret = -EFAULT;
|
|
if (copy_to_user
|
|
(int2ptr(req->req.tag), &fi->host->csr.rom->cache_head->len,
|
|
sizeof(fi->host->csr.rom->cache_head->len)))
|
|
ret = -EFAULT;
|
|
if (copy_to_user(int2ptr(req->req.address), &fi->host->csr.generation,
|
|
sizeof(fi->host->csr.generation)))
|
|
ret = -EFAULT;
|
|
if (copy_to_user(int2ptr(req->req.sendb), &status, sizeof(status)))
|
|
ret = -EFAULT;
|
|
kfree(data);
|
|
if (ret >= 0) {
|
|
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int update_config_rom(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
int ret = 0;
|
|
quadlet_t *data = kmalloc(req->req.length, GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
if (copy_from_user(data, int2ptr(req->req.sendb), req->req.length)) {
|
|
ret = -EFAULT;
|
|
} else {
|
|
int status = hpsb_update_config_rom(fi->host,
|
|
data, req->req.length,
|
|
(unsigned char)req->req.
|
|
misc);
|
|
if (copy_to_user
|
|
(int2ptr(req->req.recvb), &status, sizeof(status)))
|
|
ret = -ENOMEM;
|
|
}
|
|
kfree(data);
|
|
if (ret >= 0) {
|
|
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
|
|
fi->cfgrom_upd = 1;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int modify_config_rom(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
struct csr1212_keyval *kv;
|
|
struct csr1212_csr_rom_cache *cache;
|
|
struct csr1212_dentry *dentry;
|
|
u32 dr;
|
|
int ret = 0;
|
|
|
|
if (req->req.misc == ~0) {
|
|
if (req->req.length == 0)
|
|
return -EINVAL;
|
|
|
|
/* Find an unused slot */
|
|
for (dr = 0;
|
|
dr < RAW1394_MAX_USER_CSR_DIRS && fi->csr1212_dirs[dr];
|
|
dr++) ;
|
|
|
|
if (dr == RAW1394_MAX_USER_CSR_DIRS)
|
|
return -ENOMEM;
|
|
|
|
fi->csr1212_dirs[dr] =
|
|
csr1212_new_directory(CSR1212_KV_ID_VENDOR);
|
|
if (!fi->csr1212_dirs[dr])
|
|
return -ENOMEM;
|
|
} else {
|
|
dr = req->req.misc;
|
|
if (!fi->csr1212_dirs[dr])
|
|
return -EINVAL;
|
|
|
|
/* Delete old stuff */
|
|
for (dentry =
|
|
fi->csr1212_dirs[dr]->value.directory.dentries_head;
|
|
dentry; dentry = dentry->next) {
|
|
csr1212_detach_keyval_from_directory(fi->host->csr.rom->
|
|
root_kv,
|
|
dentry->kv);
|
|
}
|
|
|
|
if (req->req.length == 0) {
|
|
csr1212_release_keyval(fi->csr1212_dirs[dr]);
|
|
fi->csr1212_dirs[dr] = NULL;
|
|
|
|
hpsb_update_config_rom_image(fi->host);
|
|
free_pending_request(req);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
cache = csr1212_rom_cache_malloc(0, req->req.length);
|
|
if (!cache) {
|
|
csr1212_release_keyval(fi->csr1212_dirs[dr]);
|
|
fi->csr1212_dirs[dr] = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cache->filled_head = kmalloc(sizeof(*cache->filled_head), GFP_KERNEL);
|
|
if (!cache->filled_head) {
|
|
csr1212_release_keyval(fi->csr1212_dirs[dr]);
|
|
fi->csr1212_dirs[dr] = NULL;
|
|
CSR1212_FREE(cache);
|
|
return -ENOMEM;
|
|
}
|
|
cache->filled_tail = cache->filled_head;
|
|
|
|
if (copy_from_user(cache->data, int2ptr(req->req.sendb),
|
|
req->req.length)) {
|
|
csr1212_release_keyval(fi->csr1212_dirs[dr]);
|
|
fi->csr1212_dirs[dr] = NULL;
|
|
ret = -EFAULT;
|
|
} else {
|
|
cache->len = req->req.length;
|
|
cache->filled_head->offset_start = 0;
|
|
cache->filled_head->offset_end = cache->size - 1;
|
|
|
|
cache->layout_head = cache->layout_tail = fi->csr1212_dirs[dr];
|
|
|
|
ret = CSR1212_SUCCESS;
|
|
/* parse all the items */
|
|
for (kv = cache->layout_head; ret == CSR1212_SUCCESS && kv;
|
|
kv = kv->next) {
|
|
ret = csr1212_parse_keyval(kv, cache);
|
|
}
|
|
|
|
/* attach top level items to the root directory */
|
|
for (dentry =
|
|
fi->csr1212_dirs[dr]->value.directory.dentries_head;
|
|
ret == CSR1212_SUCCESS && dentry; dentry = dentry->next) {
|
|
ret =
|
|
csr1212_attach_keyval_to_directory(fi->host->csr.
|
|
rom->root_kv,
|
|
dentry->kv);
|
|
}
|
|
|
|
if (ret == CSR1212_SUCCESS) {
|
|
ret = hpsb_update_config_rom_image(fi->host);
|
|
|
|
if (ret >= 0 && copy_to_user(int2ptr(req->req.recvb),
|
|
&dr, sizeof(dr))) {
|
|
ret = -ENOMEM;
|
|
}
|
|
}
|
|
}
|
|
kfree(cache->filled_head);
|
|
CSR1212_FREE(cache);
|
|
|
|
if (ret >= 0) {
|
|
/* we have to free the request, because we queue no response,
|
|
* and therefore nobody will free it */
|
|
free_pending_request(req);
|
|
return 0;
|
|
} else {
|
|
for (dentry =
|
|
fi->csr1212_dirs[dr]->value.directory.dentries_head;
|
|
dentry; dentry = dentry->next) {
|
|
csr1212_detach_keyval_from_directory(fi->host->csr.rom->
|
|
root_kv,
|
|
dentry->kv);
|
|
}
|
|
csr1212_release_keyval(fi->csr1212_dirs[dr]);
|
|
fi->csr1212_dirs[dr] = NULL;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static int state_connected(struct file_info *fi, struct pending_request *req)
|
|
{
|
|
int node = req->req.address >> 48;
|
|
|
|
req->req.error = RAW1394_ERROR_NONE;
|
|
|
|
switch (req->req.type) {
|
|
|
|
case RAW1394_REQ_ECHO:
|
|
queue_complete_req(req);
|
|
return 0;
|
|
|
|
case RAW1394_REQ_ARM_REGISTER:
|
|
return arm_register(fi, req);
|
|
|
|
case RAW1394_REQ_ARM_UNREGISTER:
|
|
return arm_unregister(fi, req);
|
|
|
|
case RAW1394_REQ_ARM_SET_BUF:
|
|
return arm_set_buf(fi, req);
|
|
|
|
case RAW1394_REQ_ARM_GET_BUF:
|
|
return arm_get_buf(fi, req);
|
|
|
|
case RAW1394_REQ_RESET_NOTIFY:
|
|
return reset_notification(fi, req);
|
|
|
|
case RAW1394_REQ_ISO_SEND:
|
|
case RAW1394_REQ_ISO_LISTEN:
|
|
printk(KERN_DEBUG "raw1394: old iso ABI has been removed\n");
|
|
req->req.error = RAW1394_ERROR_COMPAT;
|
|
req->req.misc = RAW1394_KERNELAPI_VERSION;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
|
|
case RAW1394_REQ_FCP_LISTEN:
|
|
handle_fcp_listen(fi, req);
|
|
return 0;
|
|
|
|
case RAW1394_REQ_RESET_BUS:
|
|
if (req->req.misc == RAW1394_LONG_RESET) {
|
|
DBGMSG("busreset called (type: LONG)");
|
|
hpsb_reset_bus(fi->host, LONG_RESET);
|
|
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
|
|
return 0;
|
|
}
|
|
if (req->req.misc == RAW1394_SHORT_RESET) {
|
|
DBGMSG("busreset called (type: SHORT)");
|
|
hpsb_reset_bus(fi->host, SHORT_RESET);
|
|
free_pending_request(req); /* we have to free the request, because we queue no response, and therefore nobody will free it */
|
|
return 0;
|
|
}
|
|
/* error EINVAL (22) invalid argument */
|
|
return (-EINVAL);
|
|
case RAW1394_REQ_GET_ROM:
|
|
return get_config_rom(fi, req);
|
|
|
|
case RAW1394_REQ_UPDATE_ROM:
|
|
return update_config_rom(fi, req);
|
|
|
|
case RAW1394_REQ_MODIFY_ROM:
|
|
return modify_config_rom(fi, req);
|
|
}
|
|
|
|
if (req->req.generation != get_hpsb_generation(fi->host)) {
|
|
req->req.error = RAW1394_ERROR_GENERATION;
|
|
req->req.generation = get_hpsb_generation(fi->host);
|
|
req->req.length = 0;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
switch (req->req.type) {
|
|
case RAW1394_REQ_PHYPACKET:
|
|
return write_phypacket(fi, req);
|
|
case RAW1394_REQ_ASYNC_SEND:
|
|
return handle_async_send(fi, req);
|
|
}
|
|
|
|
if (req->req.length == 0) {
|
|
req->req.error = RAW1394_ERROR_INVALID_ARG;
|
|
queue_complete_req(req);
|
|
return 0;
|
|
}
|
|
|
|
return handle_async_request(fi, req, node);
|
|
}
|
|
|
|
static ssize_t raw1394_write(struct file *file, const char __user * buffer,
|
|
size_t count, loff_t * offset_is_ignored)
|
|
{
|
|
struct file_info *fi = (struct file_info *)file->private_data;
|
|
struct pending_request *req;
|
|
ssize_t retval = -EBADFD;
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
if (count == sizeof(struct compat_raw1394_req) &&
|
|
sizeof(struct compat_raw1394_req) !=
|
|
sizeof(struct raw1394_request)) {
|
|
buffer = raw1394_compat_write(buffer);
|
|
if (IS_ERR((__force void *)buffer))
|
|
return PTR_ERR((__force void *)buffer);
|
|
} else
|
|
#endif
|
|
if (count != sizeof(struct raw1394_request)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
req = alloc_pending_request();
|
|
if (req == NULL) {
|
|
return -ENOMEM;
|
|
}
|
|
req->file_info = fi;
|
|
|
|
if (copy_from_user(&req->req, buffer, sizeof(struct raw1394_request))) {
|
|
free_pending_request(req);
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (!mutex_trylock(&fi->state_mutex)) {
|
|
free_pending_request(req);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
switch (fi->state) {
|
|
case opened:
|
|
retval = state_opened(fi, req);
|
|
break;
|
|
|
|
case initialized:
|
|
retval = state_initialized(fi, req);
|
|
break;
|
|
|
|
case connected:
|
|
retval = state_connected(fi, req);
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&fi->state_mutex);
|
|
|
|
if (retval < 0) {
|
|
free_pending_request(req);
|
|
} else {
|
|
BUG_ON(retval);
|
|
retval = count;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* rawiso operations */
|
|
|
|
/* check if any RAW1394_REQ_RAWISO_ACTIVITY event is already in the
|
|
* completion queue (reqlists_lock must be taken) */
|
|
static inline int __rawiso_event_in_queue(struct file_info *fi)
|
|
{
|
|
struct pending_request *req;
|
|
|
|
list_for_each_entry(req, &fi->req_complete, list)
|
|
if (req->req.type == RAW1394_REQ_RAWISO_ACTIVITY)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* put a RAWISO_ACTIVITY event in the queue, if one isn't there already */
|
|
static void queue_rawiso_event(struct file_info *fi)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&fi->reqlists_lock, flags);
|
|
|
|
/* only one ISO activity event may be in the queue */
|
|
if (!__rawiso_event_in_queue(fi)) {
|
|
struct pending_request *req =
|
|
__alloc_pending_request(GFP_ATOMIC);
|
|
|
|
if (req) {
|
|
req->file_info = fi;
|
|
req->req.type = RAW1394_REQ_RAWISO_ACTIVITY;
|
|
req->req.generation = get_hpsb_generation(fi->host);
|
|
__queue_complete_req(req);
|
|
} else {
|
|
/* on allocation failure, signal an overflow */
|
|
if (fi->iso_handle) {
|
|
atomic_inc(&fi->iso_handle->overflows);
|
|
}
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
|
|
}
|
|
|
|
static void rawiso_activity_cb(struct hpsb_iso *iso)
|
|
{
|
|
unsigned long flags;
|
|
struct host_info *hi;
|
|
struct file_info *fi;
|
|
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
hi = find_host_info(iso->host);
|
|
|
|
if (hi != NULL) {
|
|
list_for_each_entry(fi, &hi->file_info_list, list) {
|
|
if (fi->iso_handle == iso)
|
|
queue_rawiso_event(fi);
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
}
|
|
|
|
/* helper function - gather all the kernel iso status bits for returning to user-space */
|
|
static void raw1394_iso_fill_status(struct hpsb_iso *iso,
|
|
struct raw1394_iso_status *stat)
|
|
{
|
|
int overflows = atomic_read(&iso->overflows);
|
|
int skips = atomic_read(&iso->skips);
|
|
|
|
stat->config.data_buf_size = iso->buf_size;
|
|
stat->config.buf_packets = iso->buf_packets;
|
|
stat->config.channel = iso->channel;
|
|
stat->config.speed = iso->speed;
|
|
stat->config.irq_interval = iso->irq_interval;
|
|
stat->n_packets = hpsb_iso_n_ready(iso);
|
|
stat->overflows = ((skips & 0xFFFF) << 16) | ((overflows & 0xFFFF));
|
|
stat->xmit_cycle = iso->xmit_cycle;
|
|
}
|
|
|
|
static int raw1394_iso_xmit_init(struct file_info *fi, void __user * uaddr)
|
|
{
|
|
struct raw1394_iso_status stat;
|
|
|
|
if (!fi->host)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&stat, uaddr, sizeof(stat)))
|
|
return -EFAULT;
|
|
|
|
fi->iso_handle = hpsb_iso_xmit_init(fi->host,
|
|
stat.config.data_buf_size,
|
|
stat.config.buf_packets,
|
|
stat.config.channel,
|
|
stat.config.speed,
|
|
stat.config.irq_interval,
|
|
rawiso_activity_cb);
|
|
if (!fi->iso_handle)
|
|
return -ENOMEM;
|
|
|
|
fi->iso_state = RAW1394_ISO_XMIT;
|
|
|
|
raw1394_iso_fill_status(fi->iso_handle, &stat);
|
|
if (copy_to_user(uaddr, &stat, sizeof(stat)))
|
|
return -EFAULT;
|
|
|
|
/* queue an event to get things started */
|
|
rawiso_activity_cb(fi->iso_handle);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int raw1394_iso_recv_init(struct file_info *fi, void __user * uaddr)
|
|
{
|
|
struct raw1394_iso_status stat;
|
|
|
|
if (!fi->host)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&stat, uaddr, sizeof(stat)))
|
|
return -EFAULT;
|
|
|
|
fi->iso_handle = hpsb_iso_recv_init(fi->host,
|
|
stat.config.data_buf_size,
|
|
stat.config.buf_packets,
|
|
stat.config.channel,
|
|
stat.config.dma_mode,
|
|
stat.config.irq_interval,
|
|
rawiso_activity_cb);
|
|
if (!fi->iso_handle)
|
|
return -ENOMEM;
|
|
|
|
fi->iso_state = RAW1394_ISO_RECV;
|
|
|
|
raw1394_iso_fill_status(fi->iso_handle, &stat);
|
|
if (copy_to_user(uaddr, &stat, sizeof(stat)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int raw1394_iso_get_status(struct file_info *fi, void __user * uaddr)
|
|
{
|
|
struct raw1394_iso_status stat;
|
|
struct hpsb_iso *iso = fi->iso_handle;
|
|
|
|
raw1394_iso_fill_status(fi->iso_handle, &stat);
|
|
if (copy_to_user(uaddr, &stat, sizeof(stat)))
|
|
return -EFAULT;
|
|
|
|
/* reset overflow counter */
|
|
atomic_set(&iso->overflows, 0);
|
|
/* reset skip counter */
|
|
atomic_set(&iso->skips, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* copy N packet_infos out of the ringbuffer into user-supplied array */
|
|
static int raw1394_iso_recv_packets(struct file_info *fi, void __user * uaddr)
|
|
{
|
|
struct raw1394_iso_packets upackets;
|
|
unsigned int packet = fi->iso_handle->first_packet;
|
|
int i;
|
|
|
|
if (copy_from_user(&upackets, uaddr, sizeof(upackets)))
|
|
return -EFAULT;
|
|
|
|
if (upackets.n_packets > hpsb_iso_n_ready(fi->iso_handle))
|
|
return -EINVAL;
|
|
|
|
/* ensure user-supplied buffer is accessible and big enough */
|
|
if (!access_ok(VERIFY_WRITE, upackets.infos,
|
|
upackets.n_packets *
|
|
sizeof(struct raw1394_iso_packet_info)))
|
|
return -EFAULT;
|
|
|
|
/* copy the packet_infos out */
|
|
for (i = 0; i < upackets.n_packets; i++) {
|
|
if (__copy_to_user(&upackets.infos[i],
|
|
&fi->iso_handle->infos[packet],
|
|
sizeof(struct raw1394_iso_packet_info)))
|
|
return -EFAULT;
|
|
|
|
packet = (packet + 1) % fi->iso_handle->buf_packets;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* copy N packet_infos from user to ringbuffer, and queue them for transmission */
|
|
static int raw1394_iso_send_packets(struct file_info *fi, void __user * uaddr)
|
|
{
|
|
struct raw1394_iso_packets upackets;
|
|
int i, rv;
|
|
|
|
if (copy_from_user(&upackets, uaddr, sizeof(upackets)))
|
|
return -EFAULT;
|
|
|
|
if (upackets.n_packets >= fi->iso_handle->buf_packets)
|
|
return -EINVAL;
|
|
|
|
if (upackets.n_packets >= hpsb_iso_n_ready(fi->iso_handle))
|
|
return -EAGAIN;
|
|
|
|
/* ensure user-supplied buffer is accessible and big enough */
|
|
if (!access_ok(VERIFY_READ, upackets.infos,
|
|
upackets.n_packets *
|
|
sizeof(struct raw1394_iso_packet_info)))
|
|
return -EFAULT;
|
|
|
|
/* copy the infos structs in and queue the packets */
|
|
for (i = 0; i < upackets.n_packets; i++) {
|
|
struct raw1394_iso_packet_info info;
|
|
|
|
if (__copy_from_user(&info, &upackets.infos[i],
|
|
sizeof(struct raw1394_iso_packet_info)))
|
|
return -EFAULT;
|
|
|
|
rv = hpsb_iso_xmit_queue_packet(fi->iso_handle, info.offset,
|
|
info.len, info.tag, info.sy);
|
|
if (rv)
|
|
return rv;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void raw1394_iso_shutdown(struct file_info *fi)
|
|
{
|
|
if (fi->iso_handle)
|
|
hpsb_iso_shutdown(fi->iso_handle);
|
|
|
|
fi->iso_handle = NULL;
|
|
fi->iso_state = RAW1394_ISO_INACTIVE;
|
|
}
|
|
|
|
static int raw1394_read_cycle_timer(struct file_info *fi, void __user * uaddr)
|
|
{
|
|
struct raw1394_cycle_timer ct;
|
|
int err;
|
|
|
|
err = hpsb_read_cycle_timer(fi->host, &ct.cycle_timer, &ct.local_time);
|
|
if (!err)
|
|
if (copy_to_user(uaddr, &ct, sizeof(ct)))
|
|
err = -EFAULT;
|
|
return err;
|
|
}
|
|
|
|
/* mmap the rawiso xmit/recv buffer */
|
|
static int raw1394_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct file_info *fi = file->private_data;
|
|
int ret;
|
|
|
|
if (!mutex_trylock(&fi->state_mutex))
|
|
return -EAGAIN;
|
|
|
|
if (fi->iso_state == RAW1394_ISO_INACTIVE)
|
|
ret = -EINVAL;
|
|
else
|
|
ret = dma_region_mmap(&fi->iso_handle->data_buf, file, vma);
|
|
|
|
mutex_unlock(&fi->state_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static long raw1394_ioctl_inactive(struct file_info *fi, unsigned int cmd,
|
|
void __user *argp)
|
|
{
|
|
switch (cmd) {
|
|
case RAW1394_IOC_ISO_XMIT_INIT:
|
|
return raw1394_iso_xmit_init(fi, argp);
|
|
case RAW1394_IOC_ISO_RECV_INIT:
|
|
return raw1394_iso_recv_init(fi, argp);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static long raw1394_ioctl_recv(struct file_info *fi, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case RAW1394_IOC_ISO_RECV_START:{
|
|
int args[3];
|
|
|
|
if (copy_from_user(&args[0], argp, sizeof(args)))
|
|
return -EFAULT;
|
|
return hpsb_iso_recv_start(fi->iso_handle,
|
|
args[0], args[1], args[2]);
|
|
}
|
|
case RAW1394_IOC_ISO_XMIT_RECV_STOP:
|
|
hpsb_iso_stop(fi->iso_handle);
|
|
return 0;
|
|
case RAW1394_IOC_ISO_RECV_LISTEN_CHANNEL:
|
|
return hpsb_iso_recv_listen_channel(fi->iso_handle, arg);
|
|
case RAW1394_IOC_ISO_RECV_UNLISTEN_CHANNEL:
|
|
return hpsb_iso_recv_unlisten_channel(fi->iso_handle, arg);
|
|
case RAW1394_IOC_ISO_RECV_SET_CHANNEL_MASK:{
|
|
u64 mask;
|
|
|
|
if (copy_from_user(&mask, argp, sizeof(mask)))
|
|
return -EFAULT;
|
|
return hpsb_iso_recv_set_channel_mask(fi->iso_handle,
|
|
mask);
|
|
}
|
|
case RAW1394_IOC_ISO_GET_STATUS:
|
|
return raw1394_iso_get_status(fi, argp);
|
|
case RAW1394_IOC_ISO_RECV_PACKETS:
|
|
return raw1394_iso_recv_packets(fi, argp);
|
|
case RAW1394_IOC_ISO_RECV_RELEASE_PACKETS:
|
|
return hpsb_iso_recv_release_packets(fi->iso_handle, arg);
|
|
case RAW1394_IOC_ISO_RECV_FLUSH:
|
|
return hpsb_iso_recv_flush(fi->iso_handle);
|
|
case RAW1394_IOC_ISO_SHUTDOWN:
|
|
raw1394_iso_shutdown(fi);
|
|
return 0;
|
|
case RAW1394_IOC_ISO_QUEUE_ACTIVITY:
|
|
queue_rawiso_event(fi);
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static long raw1394_ioctl_xmit(struct file_info *fi, unsigned int cmd,
|
|
void __user *argp)
|
|
{
|
|
switch (cmd) {
|
|
case RAW1394_IOC_ISO_XMIT_START:{
|
|
int args[2];
|
|
|
|
if (copy_from_user(&args[0], argp, sizeof(args)))
|
|
return -EFAULT;
|
|
return hpsb_iso_xmit_start(fi->iso_handle,
|
|
args[0], args[1]);
|
|
}
|
|
case RAW1394_IOC_ISO_XMIT_SYNC:
|
|
return hpsb_iso_xmit_sync(fi->iso_handle);
|
|
case RAW1394_IOC_ISO_XMIT_RECV_STOP:
|
|
hpsb_iso_stop(fi->iso_handle);
|
|
return 0;
|
|
case RAW1394_IOC_ISO_GET_STATUS:
|
|
return raw1394_iso_get_status(fi, argp);
|
|
case RAW1394_IOC_ISO_XMIT_PACKETS:
|
|
return raw1394_iso_send_packets(fi, argp);
|
|
case RAW1394_IOC_ISO_SHUTDOWN:
|
|
raw1394_iso_shutdown(fi);
|
|
return 0;
|
|
case RAW1394_IOC_ISO_QUEUE_ACTIVITY:
|
|
queue_rawiso_event(fi);
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* ioctl is only used for rawiso operations */
|
|
static long raw1394_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct file_info *fi = file->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
long ret;
|
|
|
|
/* state-independent commands */
|
|
switch(cmd) {
|
|
case RAW1394_IOC_GET_CYCLE_TIMER:
|
|
return raw1394_read_cycle_timer(fi, argp);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!mutex_trylock(&fi->state_mutex))
|
|
return -EAGAIN;
|
|
|
|
switch (fi->iso_state) {
|
|
case RAW1394_ISO_INACTIVE:
|
|
ret = raw1394_ioctl_inactive(fi, cmd, argp);
|
|
break;
|
|
case RAW1394_ISO_RECV:
|
|
ret = raw1394_ioctl_recv(fi, cmd, arg);
|
|
break;
|
|
case RAW1394_ISO_XMIT:
|
|
ret = raw1394_ioctl_xmit(fi, cmd, argp);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&fi->state_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
struct raw1394_iso_packets32 {
|
|
__u32 n_packets;
|
|
compat_uptr_t infos;
|
|
} __attribute__((packed));
|
|
|
|
struct raw1394_cycle_timer32 {
|
|
__u32 cycle_timer;
|
|
__u64 local_time;
|
|
}
|
|
#if defined(CONFIG_X86_64) || defined(CONFIG_IA64)
|
|
__attribute__((packed))
|
|
#endif
|
|
;
|
|
|
|
#define RAW1394_IOC_ISO_RECV_PACKETS32 \
|
|
_IOW ('#', 0x25, struct raw1394_iso_packets32)
|
|
#define RAW1394_IOC_ISO_XMIT_PACKETS32 \
|
|
_IOW ('#', 0x27, struct raw1394_iso_packets32)
|
|
#define RAW1394_IOC_GET_CYCLE_TIMER32 \
|
|
_IOR ('#', 0x30, struct raw1394_cycle_timer32)
|
|
|
|
static long raw1394_iso_xmit_recv_packets32(struct file *file, unsigned int cmd,
|
|
struct raw1394_iso_packets32 __user *arg)
|
|
{
|
|
compat_uptr_t infos32;
|
|
void __user *infos;
|
|
long err = -EFAULT;
|
|
struct raw1394_iso_packets __user *dst = compat_alloc_user_space(sizeof(struct raw1394_iso_packets));
|
|
|
|
if (!copy_in_user(&dst->n_packets, &arg->n_packets, sizeof arg->n_packets) &&
|
|
!copy_from_user(&infos32, &arg->infos, sizeof infos32)) {
|
|
infos = compat_ptr(infos32);
|
|
if (!copy_to_user(&dst->infos, &infos, sizeof infos))
|
|
err = raw1394_ioctl(file, cmd, (unsigned long)dst);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static long raw1394_read_cycle_timer32(struct file_info *fi, void __user * uaddr)
|
|
{
|
|
struct raw1394_cycle_timer32 ct;
|
|
int err;
|
|
|
|
err = hpsb_read_cycle_timer(fi->host, &ct.cycle_timer, &ct.local_time);
|
|
if (!err)
|
|
if (copy_to_user(uaddr, &ct, sizeof(ct)))
|
|
err = -EFAULT;
|
|
return err;
|
|
}
|
|
|
|
static long raw1394_compat_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct file_info *fi = file->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
long err;
|
|
|
|
switch (cmd) {
|
|
/* These requests have same format as long as 'int' has same size. */
|
|
case RAW1394_IOC_ISO_RECV_INIT:
|
|
case RAW1394_IOC_ISO_RECV_START:
|
|
case RAW1394_IOC_ISO_RECV_LISTEN_CHANNEL:
|
|
case RAW1394_IOC_ISO_RECV_UNLISTEN_CHANNEL:
|
|
case RAW1394_IOC_ISO_RECV_SET_CHANNEL_MASK:
|
|
case RAW1394_IOC_ISO_RECV_RELEASE_PACKETS:
|
|
case RAW1394_IOC_ISO_RECV_FLUSH:
|
|
case RAW1394_IOC_ISO_XMIT_RECV_STOP:
|
|
case RAW1394_IOC_ISO_XMIT_INIT:
|
|
case RAW1394_IOC_ISO_XMIT_START:
|
|
case RAW1394_IOC_ISO_XMIT_SYNC:
|
|
case RAW1394_IOC_ISO_GET_STATUS:
|
|
case RAW1394_IOC_ISO_SHUTDOWN:
|
|
case RAW1394_IOC_ISO_QUEUE_ACTIVITY:
|
|
err = raw1394_ioctl(file, cmd, arg);
|
|
break;
|
|
/* These request have different format. */
|
|
case RAW1394_IOC_ISO_RECV_PACKETS32:
|
|
err = raw1394_iso_xmit_recv_packets32(file, RAW1394_IOC_ISO_RECV_PACKETS, argp);
|
|
break;
|
|
case RAW1394_IOC_ISO_XMIT_PACKETS32:
|
|
err = raw1394_iso_xmit_recv_packets32(file, RAW1394_IOC_ISO_XMIT_PACKETS, argp);
|
|
break;
|
|
case RAW1394_IOC_GET_CYCLE_TIMER32:
|
|
err = raw1394_read_cycle_timer32(fi, argp);
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
static unsigned int raw1394_poll(struct file *file, poll_table * pt)
|
|
{
|
|
struct file_info *fi = file->private_data;
|
|
unsigned int mask = POLLOUT | POLLWRNORM;
|
|
unsigned long flags;
|
|
|
|
poll_wait(file, &fi->wait_complete, pt);
|
|
|
|
spin_lock_irqsave(&fi->reqlists_lock, flags);
|
|
if (!list_empty(&fi->req_complete)) {
|
|
mask |= POLLIN | POLLRDNORM;
|
|
}
|
|
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int raw1394_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct file_info *fi;
|
|
|
|
fi = kzalloc(sizeof(*fi), GFP_KERNEL);
|
|
if (!fi)
|
|
return -ENOMEM;
|
|
|
|
fi->notification = (u8) RAW1394_NOTIFY_ON; /* busreset notification */
|
|
|
|
INIT_LIST_HEAD(&fi->list);
|
|
mutex_init(&fi->state_mutex);
|
|
fi->state = opened;
|
|
INIT_LIST_HEAD(&fi->req_pending);
|
|
INIT_LIST_HEAD(&fi->req_complete);
|
|
spin_lock_init(&fi->reqlists_lock);
|
|
init_waitqueue_head(&fi->wait_complete);
|
|
INIT_LIST_HEAD(&fi->addr_list);
|
|
|
|
file->private_data = fi;
|
|
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int raw1394_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct file_info *fi = file->private_data;
|
|
struct list_head *lh;
|
|
struct pending_request *req;
|
|
int i, fail;
|
|
int retval = 0;
|
|
struct list_head *entry;
|
|
struct arm_addr *addr = NULL;
|
|
struct host_info *hi;
|
|
struct file_info *fi_hlp = NULL;
|
|
struct arm_addr *arm_addr = NULL;
|
|
int another_host;
|
|
int csr_mod = 0;
|
|
unsigned long flags;
|
|
|
|
if (fi->iso_state != RAW1394_ISO_INACTIVE)
|
|
raw1394_iso_shutdown(fi);
|
|
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
|
|
fail = 0;
|
|
/* set address-entries invalid */
|
|
|
|
while (!list_empty(&fi->addr_list)) {
|
|
another_host = 0;
|
|
lh = fi->addr_list.next;
|
|
addr = list_entry(lh, struct arm_addr, addr_list);
|
|
/* another host with valid address-entry containing
|
|
same addressrange? */
|
|
list_for_each_entry(hi, &host_info_list, list) {
|
|
if (hi->host != fi->host) {
|
|
list_for_each_entry(fi_hlp, &hi->file_info_list,
|
|
list) {
|
|
entry = fi_hlp->addr_list.next;
|
|
while (entry != &(fi_hlp->addr_list)) {
|
|
arm_addr = list_entry(entry, struct
|
|
arm_addr,
|
|
addr_list);
|
|
if (arm_addr->start ==
|
|
addr->start) {
|
|
DBGMSG
|
|
("raw1394_release: "
|
|
"another host ownes "
|
|
"same addressrange");
|
|
another_host = 1;
|
|
break;
|
|
}
|
|
entry = entry->next;
|
|
}
|
|
if (another_host) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!another_host) {
|
|
DBGMSG("raw1394_release: call hpsb_arm_unregister");
|
|
retval =
|
|
hpsb_unregister_addrspace(&raw1394_highlevel,
|
|
fi->host, addr->start);
|
|
if (!retval) {
|
|
++fail;
|
|
printk(KERN_ERR
|
|
"raw1394_release arm_Unregister failed\n");
|
|
}
|
|
}
|
|
DBGMSG("raw1394_release: delete addr_entry from list");
|
|
list_del(&addr->addr_list);
|
|
vfree(addr->addr_space_buffer);
|
|
kfree(addr);
|
|
} /* while */
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
if (fail > 0) {
|
|
printk(KERN_ERR "raw1394: during addr_list-release "
|
|
"error(s) occurred \n");
|
|
}
|
|
|
|
for (;;) {
|
|
/* This locked section guarantees that neither
|
|
* complete nor pending requests exist once i!=0 */
|
|
spin_lock_irqsave(&fi->reqlists_lock, flags);
|
|
while ((req = __next_complete_req(fi)))
|
|
free_pending_request(req);
|
|
|
|
i = list_empty(&fi->req_pending);
|
|
spin_unlock_irqrestore(&fi->reqlists_lock, flags);
|
|
|
|
if (i)
|
|
break;
|
|
/*
|
|
* Sleep until more requests can be freed.
|
|
*
|
|
* NB: We call the macro wait_event() with a condition argument
|
|
* with side effect. This is only possible because the side
|
|
* effect does not occur until the condition became true, and
|
|
* wait_event() won't evaluate the condition again after that.
|
|
*/
|
|
wait_event(fi->wait_complete, (req = next_complete_req(fi)));
|
|
free_pending_request(req);
|
|
}
|
|
|
|
/* Remove any sub-trees left by user space programs */
|
|
for (i = 0; i < RAW1394_MAX_USER_CSR_DIRS; i++) {
|
|
struct csr1212_dentry *dentry;
|
|
if (!fi->csr1212_dirs[i])
|
|
continue;
|
|
for (dentry =
|
|
fi->csr1212_dirs[i]->value.directory.dentries_head; dentry;
|
|
dentry = dentry->next) {
|
|
csr1212_detach_keyval_from_directory(fi->host->csr.rom->
|
|
root_kv,
|
|
dentry->kv);
|
|
}
|
|
csr1212_release_keyval(fi->csr1212_dirs[i]);
|
|
fi->csr1212_dirs[i] = NULL;
|
|
csr_mod = 1;
|
|
}
|
|
|
|
if ((csr_mod || fi->cfgrom_upd)
|
|
&& hpsb_update_config_rom_image(fi->host) < 0)
|
|
HPSB_ERR
|
|
("Failed to generate Configuration ROM image for host %d",
|
|
fi->host->id);
|
|
|
|
if (fi->state == connected) {
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
list_del(&fi->list);
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
|
|
put_device(&fi->host->device);
|
|
}
|
|
|
|
spin_lock_irqsave(&host_info_lock, flags);
|
|
if (fi->host)
|
|
module_put(fi->host->driver->owner);
|
|
spin_unlock_irqrestore(&host_info_lock, flags);
|
|
|
|
kfree(fi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*** HOTPLUG STUFF **********************************************************/
|
|
/*
|
|
* Export information about protocols/devices supported by this driver.
|
|
*/
|
|
#ifdef MODULE
|
|
static const struct ieee1394_device_id raw1394_id_table[] = {
|
|
{
|
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
|
|
.specifier_id = AVC_UNIT_SPEC_ID_ENTRY & 0xffffff,
|
|
.version = AVC_SW_VERSION_ENTRY & 0xffffff},
|
|
{
|
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
|
|
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
|
|
.version = CAMERA_SW_VERSION_ENTRY & 0xffffff},
|
|
{
|
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
|
|
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
|
|
.version = (CAMERA_SW_VERSION_ENTRY + 1) & 0xffffff},
|
|
{
|
|
.match_flags = IEEE1394_MATCH_SPECIFIER_ID | IEEE1394_MATCH_VERSION,
|
|
.specifier_id = CAMERA_UNIT_SPEC_ID_ENTRY & 0xffffff,
|
|
.version = (CAMERA_SW_VERSION_ENTRY + 2) & 0xffffff},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(ieee1394, raw1394_id_table);
|
|
#endif /* MODULE */
|
|
|
|
static struct hpsb_protocol_driver raw1394_driver = {
|
|
.name = "raw1394",
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
static struct hpsb_highlevel raw1394_highlevel = {
|
|
.name = RAW1394_DEVICE_NAME,
|
|
.add_host = add_host,
|
|
.remove_host = remove_host,
|
|
.host_reset = host_reset,
|
|
.fcp_request = fcp_request,
|
|
};
|
|
|
|
static struct cdev raw1394_cdev;
|
|
static const struct file_operations raw1394_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = raw1394_read,
|
|
.write = raw1394_write,
|
|
.mmap = raw1394_mmap,
|
|
.unlocked_ioctl = raw1394_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = raw1394_compat_ioctl,
|
|
#endif
|
|
.poll = raw1394_poll,
|
|
.open = raw1394_open,
|
|
.release = raw1394_release,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static int __init init_raw1394(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
hpsb_register_highlevel(&raw1394_highlevel);
|
|
|
|
if (IS_ERR
|
|
(device_create(hpsb_protocol_class, NULL,
|
|
MKDEV(IEEE1394_MAJOR,
|
|
IEEE1394_MINOR_BLOCK_RAW1394 * 16),
|
|
NULL, RAW1394_DEVICE_NAME))) {
|
|
ret = -EFAULT;
|
|
goto out_unreg;
|
|
}
|
|
|
|
cdev_init(&raw1394_cdev, &raw1394_fops);
|
|
raw1394_cdev.owner = THIS_MODULE;
|
|
ret = cdev_add(&raw1394_cdev, IEEE1394_RAW1394_DEV, 1);
|
|
if (ret) {
|
|
HPSB_ERR("raw1394 failed to register minor device block");
|
|
goto out_dev;
|
|
}
|
|
|
|
HPSB_INFO("raw1394: /dev/%s device initialized", RAW1394_DEVICE_NAME);
|
|
|
|
ret = hpsb_register_protocol(&raw1394_driver);
|
|
if (ret) {
|
|
HPSB_ERR("raw1394: failed to register protocol");
|
|
cdev_del(&raw1394_cdev);
|
|
goto out_dev;
|
|
}
|
|
|
|
goto out;
|
|
|
|
out_dev:
|
|
device_destroy(hpsb_protocol_class,
|
|
MKDEV(IEEE1394_MAJOR,
|
|
IEEE1394_MINOR_BLOCK_RAW1394 * 16));
|
|
out_unreg:
|
|
hpsb_unregister_highlevel(&raw1394_highlevel);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit cleanup_raw1394(void)
|
|
{
|
|
device_destroy(hpsb_protocol_class,
|
|
MKDEV(IEEE1394_MAJOR,
|
|
IEEE1394_MINOR_BLOCK_RAW1394 * 16));
|
|
cdev_del(&raw1394_cdev);
|
|
hpsb_unregister_highlevel(&raw1394_highlevel);
|
|
hpsb_unregister_protocol(&raw1394_driver);
|
|
}
|
|
|
|
module_init(init_raw1394);
|
|
module_exit(cleanup_raw1394);
|
|
MODULE_LICENSE("GPL");
|