mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 15:20:53 +07:00
37b61890d7
Convert to the much saner new idr interface. v2: Stefan pointed out that add_client_resource() may be called from non-process context. Preload iff @gfp_mask contains __GFP_WAIT. Also updated to include minor upper limit check. [tim.gardner@canonical.com: fix accidentally orphaned 'minor'[ Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1821 lines
46 KiB
C
1821 lines
46 KiB
C
/*
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* Char device for device raw access
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*
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* Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/bug.h>
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#include <linux/compat.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/errno.h>
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#include <linux/firewire.h>
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#include <linux/firewire-cdev.h>
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#include <linux/idr.h>
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#include <linux/irqflags.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/kref.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/poll.h>
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#include <linux/sched.h> /* required for linux/wait.h */
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <linux/time.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/wait.h>
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#include <linux/workqueue.h>
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#include "core.h"
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/*
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* ABI version history is documented in linux/firewire-cdev.h.
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*/
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#define FW_CDEV_KERNEL_VERSION 5
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#define FW_CDEV_VERSION_EVENT_REQUEST2 4
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#define FW_CDEV_VERSION_ALLOCATE_REGION_END 4
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struct client {
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u32 version;
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struct fw_device *device;
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spinlock_t lock;
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bool in_shutdown;
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struct idr resource_idr;
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struct list_head event_list;
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wait_queue_head_t wait;
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wait_queue_head_t tx_flush_wait;
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u64 bus_reset_closure;
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struct fw_iso_context *iso_context;
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u64 iso_closure;
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struct fw_iso_buffer buffer;
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unsigned long vm_start;
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bool buffer_is_mapped;
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struct list_head phy_receiver_link;
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u64 phy_receiver_closure;
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struct list_head link;
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struct kref kref;
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};
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static inline void client_get(struct client *client)
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{
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kref_get(&client->kref);
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}
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static void client_release(struct kref *kref)
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{
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struct client *client = container_of(kref, struct client, kref);
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fw_device_put(client->device);
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kfree(client);
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}
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static void client_put(struct client *client)
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{
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kref_put(&client->kref, client_release);
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}
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struct client_resource;
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typedef void (*client_resource_release_fn_t)(struct client *,
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struct client_resource *);
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struct client_resource {
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client_resource_release_fn_t release;
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int handle;
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};
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struct address_handler_resource {
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struct client_resource resource;
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struct fw_address_handler handler;
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__u64 closure;
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struct client *client;
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};
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struct outbound_transaction_resource {
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struct client_resource resource;
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struct fw_transaction transaction;
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};
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struct inbound_transaction_resource {
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struct client_resource resource;
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struct fw_card *card;
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struct fw_request *request;
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void *data;
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size_t length;
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};
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struct descriptor_resource {
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struct client_resource resource;
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struct fw_descriptor descriptor;
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u32 data[0];
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};
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struct iso_resource {
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struct client_resource resource;
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struct client *client;
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/* Schedule work and access todo only with client->lock held. */
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struct delayed_work work;
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enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC,
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ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo;
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int generation;
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u64 channels;
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s32 bandwidth;
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struct iso_resource_event *e_alloc, *e_dealloc;
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};
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static void release_iso_resource(struct client *, struct client_resource *);
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static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
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{
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client_get(r->client);
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if (!queue_delayed_work(fw_workqueue, &r->work, delay))
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client_put(r->client);
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}
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static void schedule_if_iso_resource(struct client_resource *resource)
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{
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if (resource->release == release_iso_resource)
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schedule_iso_resource(container_of(resource,
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struct iso_resource, resource), 0);
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}
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/*
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* dequeue_event() just kfree()'s the event, so the event has to be
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* the first field in a struct XYZ_event.
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*/
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struct event {
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struct { void *data; size_t size; } v[2];
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struct list_head link;
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};
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struct bus_reset_event {
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struct event event;
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struct fw_cdev_event_bus_reset reset;
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};
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struct outbound_transaction_event {
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struct event event;
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struct client *client;
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struct outbound_transaction_resource r;
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struct fw_cdev_event_response response;
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};
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struct inbound_transaction_event {
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struct event event;
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union {
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struct fw_cdev_event_request request;
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struct fw_cdev_event_request2 request2;
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} req;
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};
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struct iso_interrupt_event {
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struct event event;
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struct fw_cdev_event_iso_interrupt interrupt;
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};
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struct iso_interrupt_mc_event {
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struct event event;
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struct fw_cdev_event_iso_interrupt_mc interrupt;
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};
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struct iso_resource_event {
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struct event event;
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struct fw_cdev_event_iso_resource iso_resource;
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};
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struct outbound_phy_packet_event {
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struct event event;
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struct client *client;
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struct fw_packet p;
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struct fw_cdev_event_phy_packet phy_packet;
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};
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struct inbound_phy_packet_event {
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struct event event;
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struct fw_cdev_event_phy_packet phy_packet;
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};
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#ifdef CONFIG_COMPAT
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static void __user *u64_to_uptr(u64 value)
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{
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if (is_compat_task())
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return compat_ptr(value);
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else
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return (void __user *)(unsigned long)value;
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}
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static u64 uptr_to_u64(void __user *ptr)
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{
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if (is_compat_task())
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return ptr_to_compat(ptr);
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else
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return (u64)(unsigned long)ptr;
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}
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#else
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static inline void __user *u64_to_uptr(u64 value)
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{
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return (void __user *)(unsigned long)value;
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}
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static inline u64 uptr_to_u64(void __user *ptr)
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{
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return (u64)(unsigned long)ptr;
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}
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#endif /* CONFIG_COMPAT */
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static int fw_device_op_open(struct inode *inode, struct file *file)
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{
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struct fw_device *device;
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struct client *client;
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device = fw_device_get_by_devt(inode->i_rdev);
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if (device == NULL)
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return -ENODEV;
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if (fw_device_is_shutdown(device)) {
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fw_device_put(device);
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return -ENODEV;
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}
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client = kzalloc(sizeof(*client), GFP_KERNEL);
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if (client == NULL) {
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fw_device_put(device);
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return -ENOMEM;
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}
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client->device = device;
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spin_lock_init(&client->lock);
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idr_init(&client->resource_idr);
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INIT_LIST_HEAD(&client->event_list);
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init_waitqueue_head(&client->wait);
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init_waitqueue_head(&client->tx_flush_wait);
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INIT_LIST_HEAD(&client->phy_receiver_link);
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INIT_LIST_HEAD(&client->link);
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kref_init(&client->kref);
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file->private_data = client;
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return nonseekable_open(inode, file);
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}
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static void queue_event(struct client *client, struct event *event,
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void *data0, size_t size0, void *data1, size_t size1)
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{
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unsigned long flags;
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event->v[0].data = data0;
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event->v[0].size = size0;
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event->v[1].data = data1;
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event->v[1].size = size1;
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spin_lock_irqsave(&client->lock, flags);
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if (client->in_shutdown)
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kfree(event);
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else
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list_add_tail(&event->link, &client->event_list);
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spin_unlock_irqrestore(&client->lock, flags);
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wake_up_interruptible(&client->wait);
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}
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static int dequeue_event(struct client *client,
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char __user *buffer, size_t count)
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{
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struct event *event;
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size_t size, total;
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int i, ret;
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ret = wait_event_interruptible(client->wait,
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!list_empty(&client->event_list) ||
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fw_device_is_shutdown(client->device));
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if (ret < 0)
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return ret;
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if (list_empty(&client->event_list) &&
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fw_device_is_shutdown(client->device))
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return -ENODEV;
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spin_lock_irq(&client->lock);
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event = list_first_entry(&client->event_list, struct event, link);
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list_del(&event->link);
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spin_unlock_irq(&client->lock);
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total = 0;
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for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
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size = min(event->v[i].size, count - total);
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if (copy_to_user(buffer + total, event->v[i].data, size)) {
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ret = -EFAULT;
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goto out;
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}
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total += size;
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}
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ret = total;
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out:
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kfree(event);
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return ret;
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}
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static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
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size_t count, loff_t *offset)
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{
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struct client *client = file->private_data;
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return dequeue_event(client, buffer, count);
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}
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static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
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struct client *client)
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{
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struct fw_card *card = client->device->card;
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spin_lock_irq(&card->lock);
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event->closure = client->bus_reset_closure;
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event->type = FW_CDEV_EVENT_BUS_RESET;
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event->generation = client->device->generation;
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event->node_id = client->device->node_id;
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event->local_node_id = card->local_node->node_id;
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event->bm_node_id = card->bm_node_id;
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event->irm_node_id = card->irm_node->node_id;
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event->root_node_id = card->root_node->node_id;
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spin_unlock_irq(&card->lock);
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}
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static void for_each_client(struct fw_device *device,
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void (*callback)(struct client *client))
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{
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struct client *c;
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mutex_lock(&device->client_list_mutex);
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list_for_each_entry(c, &device->client_list, link)
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callback(c);
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mutex_unlock(&device->client_list_mutex);
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}
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static int schedule_reallocations(int id, void *p, void *data)
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{
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schedule_if_iso_resource(p);
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return 0;
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}
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static void queue_bus_reset_event(struct client *client)
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{
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struct bus_reset_event *e;
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e = kzalloc(sizeof(*e), GFP_KERNEL);
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if (e == NULL) {
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fw_notice(client->device->card, "out of memory when allocating event\n");
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return;
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}
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fill_bus_reset_event(&e->reset, client);
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queue_event(client, &e->event,
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&e->reset, sizeof(e->reset), NULL, 0);
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spin_lock_irq(&client->lock);
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idr_for_each(&client->resource_idr, schedule_reallocations, client);
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spin_unlock_irq(&client->lock);
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}
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void fw_device_cdev_update(struct fw_device *device)
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{
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for_each_client(device, queue_bus_reset_event);
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}
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static void wake_up_client(struct client *client)
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{
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wake_up_interruptible(&client->wait);
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}
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void fw_device_cdev_remove(struct fw_device *device)
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{
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for_each_client(device, wake_up_client);
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}
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union ioctl_arg {
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struct fw_cdev_get_info get_info;
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struct fw_cdev_send_request send_request;
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struct fw_cdev_allocate allocate;
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struct fw_cdev_deallocate deallocate;
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struct fw_cdev_send_response send_response;
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struct fw_cdev_initiate_bus_reset initiate_bus_reset;
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struct fw_cdev_add_descriptor add_descriptor;
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struct fw_cdev_remove_descriptor remove_descriptor;
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struct fw_cdev_create_iso_context create_iso_context;
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struct fw_cdev_queue_iso queue_iso;
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struct fw_cdev_start_iso start_iso;
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struct fw_cdev_stop_iso stop_iso;
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struct fw_cdev_get_cycle_timer get_cycle_timer;
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struct fw_cdev_allocate_iso_resource allocate_iso_resource;
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struct fw_cdev_send_stream_packet send_stream_packet;
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struct fw_cdev_get_cycle_timer2 get_cycle_timer2;
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struct fw_cdev_send_phy_packet send_phy_packet;
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struct fw_cdev_receive_phy_packets receive_phy_packets;
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struct fw_cdev_set_iso_channels set_iso_channels;
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struct fw_cdev_flush_iso flush_iso;
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};
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static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
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{
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struct fw_cdev_get_info *a = &arg->get_info;
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struct fw_cdev_event_bus_reset bus_reset;
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unsigned long ret = 0;
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client->version = a->version;
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a->version = FW_CDEV_KERNEL_VERSION;
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a->card = client->device->card->index;
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down_read(&fw_device_rwsem);
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if (a->rom != 0) {
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size_t want = a->rom_length;
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size_t have = client->device->config_rom_length * 4;
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ret = copy_to_user(u64_to_uptr(a->rom),
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client->device->config_rom, min(want, have));
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}
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a->rom_length = client->device->config_rom_length * 4;
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up_read(&fw_device_rwsem);
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|
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if (ret != 0)
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return -EFAULT;
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mutex_lock(&client->device->client_list_mutex);
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client->bus_reset_closure = a->bus_reset_closure;
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if (a->bus_reset != 0) {
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fill_bus_reset_event(&bus_reset, client);
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/* unaligned size of bus_reset is 36 bytes */
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ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36);
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}
|
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if (ret == 0 && list_empty(&client->link))
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list_add_tail(&client->link, &client->device->client_list);
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|
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mutex_unlock(&client->device->client_list_mutex);
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|
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return ret ? -EFAULT : 0;
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}
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|
|
|
static int add_client_resource(struct client *client,
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|
struct client_resource *resource, gfp_t gfp_mask)
|
|
{
|
|
bool preload = gfp_mask & __GFP_WAIT;
|
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unsigned long flags;
|
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int ret;
|
|
|
|
if (preload)
|
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idr_preload(gfp_mask);
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spin_lock_irqsave(&client->lock, flags);
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|
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if (client->in_shutdown)
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ret = -ECANCELED;
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else
|
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ret = idr_alloc(&client->resource_idr, resource, 0, 0,
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GFP_NOWAIT);
|
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if (ret >= 0) {
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resource->handle = ret;
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client_get(client);
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schedule_if_iso_resource(resource);
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}
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|
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spin_unlock_irqrestore(&client->lock, flags);
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if (preload)
|
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idr_preload_end();
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|
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return ret < 0 ? ret : 0;
|
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}
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|
|
|
static int release_client_resource(struct client *client, u32 handle,
|
|
client_resource_release_fn_t release,
|
|
struct client_resource **return_resource)
|
|
{
|
|
struct client_resource *resource;
|
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|
|
spin_lock_irq(&client->lock);
|
|
if (client->in_shutdown)
|
|
resource = NULL;
|
|
else
|
|
resource = idr_find(&client->resource_idr, handle);
|
|
if (resource && resource->release == release)
|
|
idr_remove(&client->resource_idr, handle);
|
|
spin_unlock_irq(&client->lock);
|
|
|
|
if (!(resource && resource->release == release))
|
|
return -EINVAL;
|
|
|
|
if (return_resource)
|
|
*return_resource = resource;
|
|
else
|
|
resource->release(client, resource);
|
|
|
|
client_put(client);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void release_transaction(struct client *client,
|
|
struct client_resource *resource)
|
|
{
|
|
}
|
|
|
|
static void complete_transaction(struct fw_card *card, int rcode,
|
|
void *payload, size_t length, void *data)
|
|
{
|
|
struct outbound_transaction_event *e = data;
|
|
struct fw_cdev_event_response *rsp = &e->response;
|
|
struct client *client = e->client;
|
|
unsigned long flags;
|
|
|
|
if (length < rsp->length)
|
|
rsp->length = length;
|
|
if (rcode == RCODE_COMPLETE)
|
|
memcpy(rsp->data, payload, rsp->length);
|
|
|
|
spin_lock_irqsave(&client->lock, flags);
|
|
idr_remove(&client->resource_idr, e->r.resource.handle);
|
|
if (client->in_shutdown)
|
|
wake_up(&client->tx_flush_wait);
|
|
spin_unlock_irqrestore(&client->lock, flags);
|
|
|
|
rsp->type = FW_CDEV_EVENT_RESPONSE;
|
|
rsp->rcode = rcode;
|
|
|
|
/*
|
|
* In the case that sizeof(*rsp) doesn't align with the position of the
|
|
* data, and the read is short, preserve an extra copy of the data
|
|
* to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
|
|
* for short reads and some apps depended on it, this is both safe
|
|
* and prudent for compatibility.
|
|
*/
|
|
if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data))
|
|
queue_event(client, &e->event, rsp, sizeof(*rsp),
|
|
rsp->data, rsp->length);
|
|
else
|
|
queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
|
|
NULL, 0);
|
|
|
|
/* Drop the idr's reference */
|
|
client_put(client);
|
|
}
|
|
|
|
static int init_request(struct client *client,
|
|
struct fw_cdev_send_request *request,
|
|
int destination_id, int speed)
|
|
{
|
|
struct outbound_transaction_event *e;
|
|
int ret;
|
|
|
|
if (request->tcode != TCODE_STREAM_DATA &&
|
|
(request->length > 4096 || request->length > 512 << speed))
|
|
return -EIO;
|
|
|
|
if (request->tcode == TCODE_WRITE_QUADLET_REQUEST &&
|
|
request->length < 4)
|
|
return -EINVAL;
|
|
|
|
e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
|
|
if (e == NULL)
|
|
return -ENOMEM;
|
|
|
|
e->client = client;
|
|
e->response.length = request->length;
|
|
e->response.closure = request->closure;
|
|
|
|
if (request->data &&
|
|
copy_from_user(e->response.data,
|
|
u64_to_uptr(request->data), request->length)) {
|
|
ret = -EFAULT;
|
|
goto failed;
|
|
}
|
|
|
|
e->r.resource.release = release_transaction;
|
|
ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
|
|
if (ret < 0)
|
|
goto failed;
|
|
|
|
fw_send_request(client->device->card, &e->r.transaction,
|
|
request->tcode, destination_id, request->generation,
|
|
speed, request->offset, e->response.data,
|
|
request->length, complete_transaction, e);
|
|
return 0;
|
|
|
|
failed:
|
|
kfree(e);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
switch (arg->send_request.tcode) {
|
|
case TCODE_WRITE_QUADLET_REQUEST:
|
|
case TCODE_WRITE_BLOCK_REQUEST:
|
|
case TCODE_READ_QUADLET_REQUEST:
|
|
case TCODE_READ_BLOCK_REQUEST:
|
|
case TCODE_LOCK_MASK_SWAP:
|
|
case TCODE_LOCK_COMPARE_SWAP:
|
|
case TCODE_LOCK_FETCH_ADD:
|
|
case TCODE_LOCK_LITTLE_ADD:
|
|
case TCODE_LOCK_BOUNDED_ADD:
|
|
case TCODE_LOCK_WRAP_ADD:
|
|
case TCODE_LOCK_VENDOR_DEPENDENT:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return init_request(client, &arg->send_request, client->device->node_id,
|
|
client->device->max_speed);
|
|
}
|
|
|
|
static inline bool is_fcp_request(struct fw_request *request)
|
|
{
|
|
return request == NULL;
|
|
}
|
|
|
|
static void release_request(struct client *client,
|
|
struct client_resource *resource)
|
|
{
|
|
struct inbound_transaction_resource *r = container_of(resource,
|
|
struct inbound_transaction_resource, resource);
|
|
|
|
if (is_fcp_request(r->request))
|
|
kfree(r->data);
|
|
else
|
|
fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR);
|
|
|
|
fw_card_put(r->card);
|
|
kfree(r);
|
|
}
|
|
|
|
static void handle_request(struct fw_card *card, struct fw_request *request,
|
|
int tcode, int destination, int source,
|
|
int generation, unsigned long long offset,
|
|
void *payload, size_t length, void *callback_data)
|
|
{
|
|
struct address_handler_resource *handler = callback_data;
|
|
struct inbound_transaction_resource *r;
|
|
struct inbound_transaction_event *e;
|
|
size_t event_size0;
|
|
void *fcp_frame = NULL;
|
|
int ret;
|
|
|
|
/* card may be different from handler->client->device->card */
|
|
fw_card_get(card);
|
|
|
|
r = kmalloc(sizeof(*r), GFP_ATOMIC);
|
|
e = kmalloc(sizeof(*e), GFP_ATOMIC);
|
|
if (r == NULL || e == NULL) {
|
|
fw_notice(card, "out of memory when allocating event\n");
|
|
goto failed;
|
|
}
|
|
r->card = card;
|
|
r->request = request;
|
|
r->data = payload;
|
|
r->length = length;
|
|
|
|
if (is_fcp_request(request)) {
|
|
/*
|
|
* FIXME: Let core-transaction.c manage a
|
|
* single reference-counted copy?
|
|
*/
|
|
fcp_frame = kmemdup(payload, length, GFP_ATOMIC);
|
|
if (fcp_frame == NULL)
|
|
goto failed;
|
|
|
|
r->data = fcp_frame;
|
|
}
|
|
|
|
r->resource.release = release_request;
|
|
ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
|
|
if (ret < 0)
|
|
goto failed;
|
|
|
|
if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) {
|
|
struct fw_cdev_event_request *req = &e->req.request;
|
|
|
|
if (tcode & 0x10)
|
|
tcode = TCODE_LOCK_REQUEST;
|
|
|
|
req->type = FW_CDEV_EVENT_REQUEST;
|
|
req->tcode = tcode;
|
|
req->offset = offset;
|
|
req->length = length;
|
|
req->handle = r->resource.handle;
|
|
req->closure = handler->closure;
|
|
event_size0 = sizeof(*req);
|
|
} else {
|
|
struct fw_cdev_event_request2 *req = &e->req.request2;
|
|
|
|
req->type = FW_CDEV_EVENT_REQUEST2;
|
|
req->tcode = tcode;
|
|
req->offset = offset;
|
|
req->source_node_id = source;
|
|
req->destination_node_id = destination;
|
|
req->card = card->index;
|
|
req->generation = generation;
|
|
req->length = length;
|
|
req->handle = r->resource.handle;
|
|
req->closure = handler->closure;
|
|
event_size0 = sizeof(*req);
|
|
}
|
|
|
|
queue_event(handler->client, &e->event,
|
|
&e->req, event_size0, r->data, length);
|
|
return;
|
|
|
|
failed:
|
|
kfree(r);
|
|
kfree(e);
|
|
kfree(fcp_frame);
|
|
|
|
if (!is_fcp_request(request))
|
|
fw_send_response(card, request, RCODE_CONFLICT_ERROR);
|
|
|
|
fw_card_put(card);
|
|
}
|
|
|
|
static void release_address_handler(struct client *client,
|
|
struct client_resource *resource)
|
|
{
|
|
struct address_handler_resource *r =
|
|
container_of(resource, struct address_handler_resource, resource);
|
|
|
|
fw_core_remove_address_handler(&r->handler);
|
|
kfree(r);
|
|
}
|
|
|
|
static int ioctl_allocate(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_allocate *a = &arg->allocate;
|
|
struct address_handler_resource *r;
|
|
struct fw_address_region region;
|
|
int ret;
|
|
|
|
r = kmalloc(sizeof(*r), GFP_KERNEL);
|
|
if (r == NULL)
|
|
return -ENOMEM;
|
|
|
|
region.start = a->offset;
|
|
if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END)
|
|
region.end = a->offset + a->length;
|
|
else
|
|
region.end = a->region_end;
|
|
|
|
r->handler.length = a->length;
|
|
r->handler.address_callback = handle_request;
|
|
r->handler.callback_data = r;
|
|
r->closure = a->closure;
|
|
r->client = client;
|
|
|
|
ret = fw_core_add_address_handler(&r->handler, ®ion);
|
|
if (ret < 0) {
|
|
kfree(r);
|
|
return ret;
|
|
}
|
|
a->offset = r->handler.offset;
|
|
|
|
r->resource.release = release_address_handler;
|
|
ret = add_client_resource(client, &r->resource, GFP_KERNEL);
|
|
if (ret < 0) {
|
|
release_address_handler(client, &r->resource);
|
|
return ret;
|
|
}
|
|
a->handle = r->resource.handle;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ioctl_deallocate(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
return release_client_resource(client, arg->deallocate.handle,
|
|
release_address_handler, NULL);
|
|
}
|
|
|
|
static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_send_response *a = &arg->send_response;
|
|
struct client_resource *resource;
|
|
struct inbound_transaction_resource *r;
|
|
int ret = 0;
|
|
|
|
if (release_client_resource(client, a->handle,
|
|
release_request, &resource) < 0)
|
|
return -EINVAL;
|
|
|
|
r = container_of(resource, struct inbound_transaction_resource,
|
|
resource);
|
|
if (is_fcp_request(r->request))
|
|
goto out;
|
|
|
|
if (a->length != fw_get_response_length(r->request)) {
|
|
ret = -EINVAL;
|
|
kfree(r->request);
|
|
goto out;
|
|
}
|
|
if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) {
|
|
ret = -EFAULT;
|
|
kfree(r->request);
|
|
goto out;
|
|
}
|
|
fw_send_response(r->card, r->request, a->rcode);
|
|
out:
|
|
fw_card_put(r->card);
|
|
kfree(r);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
fw_schedule_bus_reset(client->device->card, true,
|
|
arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET);
|
|
return 0;
|
|
}
|
|
|
|
static void release_descriptor(struct client *client,
|
|
struct client_resource *resource)
|
|
{
|
|
struct descriptor_resource *r =
|
|
container_of(resource, struct descriptor_resource, resource);
|
|
|
|
fw_core_remove_descriptor(&r->descriptor);
|
|
kfree(r);
|
|
}
|
|
|
|
static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_add_descriptor *a = &arg->add_descriptor;
|
|
struct descriptor_resource *r;
|
|
int ret;
|
|
|
|
/* Access policy: Allow this ioctl only on local nodes' device files. */
|
|
if (!client->device->is_local)
|
|
return -ENOSYS;
|
|
|
|
if (a->length > 256)
|
|
return -EINVAL;
|
|
|
|
r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL);
|
|
if (r == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) {
|
|
ret = -EFAULT;
|
|
goto failed;
|
|
}
|
|
|
|
r->descriptor.length = a->length;
|
|
r->descriptor.immediate = a->immediate;
|
|
r->descriptor.key = a->key;
|
|
r->descriptor.data = r->data;
|
|
|
|
ret = fw_core_add_descriptor(&r->descriptor);
|
|
if (ret < 0)
|
|
goto failed;
|
|
|
|
r->resource.release = release_descriptor;
|
|
ret = add_client_resource(client, &r->resource, GFP_KERNEL);
|
|
if (ret < 0) {
|
|
fw_core_remove_descriptor(&r->descriptor);
|
|
goto failed;
|
|
}
|
|
a->handle = r->resource.handle;
|
|
|
|
return 0;
|
|
failed:
|
|
kfree(r);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
return release_client_resource(client, arg->remove_descriptor.handle,
|
|
release_descriptor, NULL);
|
|
}
|
|
|
|
static void iso_callback(struct fw_iso_context *context, u32 cycle,
|
|
size_t header_length, void *header, void *data)
|
|
{
|
|
struct client *client = data;
|
|
struct iso_interrupt_event *e;
|
|
|
|
e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
|
|
if (e == NULL) {
|
|
fw_notice(context->card, "out of memory when allocating event\n");
|
|
return;
|
|
}
|
|
e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
|
|
e->interrupt.closure = client->iso_closure;
|
|
e->interrupt.cycle = cycle;
|
|
e->interrupt.header_length = header_length;
|
|
memcpy(e->interrupt.header, header, header_length);
|
|
queue_event(client, &e->event, &e->interrupt,
|
|
sizeof(e->interrupt) + header_length, NULL, 0);
|
|
}
|
|
|
|
static void iso_mc_callback(struct fw_iso_context *context,
|
|
dma_addr_t completed, void *data)
|
|
{
|
|
struct client *client = data;
|
|
struct iso_interrupt_mc_event *e;
|
|
|
|
e = kmalloc(sizeof(*e), GFP_ATOMIC);
|
|
if (e == NULL) {
|
|
fw_notice(context->card, "out of memory when allocating event\n");
|
|
return;
|
|
}
|
|
e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL;
|
|
e->interrupt.closure = client->iso_closure;
|
|
e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer,
|
|
completed);
|
|
queue_event(client, &e->event, &e->interrupt,
|
|
sizeof(e->interrupt), NULL, 0);
|
|
}
|
|
|
|
static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context)
|
|
{
|
|
if (context->type == FW_ISO_CONTEXT_TRANSMIT)
|
|
return DMA_TO_DEVICE;
|
|
else
|
|
return DMA_FROM_DEVICE;
|
|
}
|
|
|
|
static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
|
|
struct fw_iso_context *context;
|
|
fw_iso_callback_t cb;
|
|
int ret;
|
|
|
|
BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT ||
|
|
FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE ||
|
|
FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL !=
|
|
FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL);
|
|
|
|
switch (a->type) {
|
|
case FW_ISO_CONTEXT_TRANSMIT:
|
|
if (a->speed > SCODE_3200 || a->channel > 63)
|
|
return -EINVAL;
|
|
|
|
cb = iso_callback;
|
|
break;
|
|
|
|
case FW_ISO_CONTEXT_RECEIVE:
|
|
if (a->header_size < 4 || (a->header_size & 3) ||
|
|
a->channel > 63)
|
|
return -EINVAL;
|
|
|
|
cb = iso_callback;
|
|
break;
|
|
|
|
case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
|
|
cb = (fw_iso_callback_t)iso_mc_callback;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
context = fw_iso_context_create(client->device->card, a->type,
|
|
a->channel, a->speed, a->header_size, cb, client);
|
|
if (IS_ERR(context))
|
|
return PTR_ERR(context);
|
|
|
|
/* We only support one context at this time. */
|
|
spin_lock_irq(&client->lock);
|
|
if (client->iso_context != NULL) {
|
|
spin_unlock_irq(&client->lock);
|
|
fw_iso_context_destroy(context);
|
|
|
|
return -EBUSY;
|
|
}
|
|
if (!client->buffer_is_mapped) {
|
|
ret = fw_iso_buffer_map_dma(&client->buffer,
|
|
client->device->card,
|
|
iso_dma_direction(context));
|
|
if (ret < 0) {
|
|
spin_unlock_irq(&client->lock);
|
|
fw_iso_context_destroy(context);
|
|
|
|
return ret;
|
|
}
|
|
client->buffer_is_mapped = true;
|
|
}
|
|
client->iso_closure = a->closure;
|
|
client->iso_context = context;
|
|
spin_unlock_irq(&client->lock);
|
|
|
|
a->handle = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels;
|
|
struct fw_iso_context *ctx = client->iso_context;
|
|
|
|
if (ctx == NULL || a->handle != 0)
|
|
return -EINVAL;
|
|
|
|
return fw_iso_context_set_channels(ctx, &a->channels);
|
|
}
|
|
|
|
/* Macros for decoding the iso packet control header. */
|
|
#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
|
|
#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
|
|
#define GET_SKIP(v) (((v) >> 17) & 0x01)
|
|
#define GET_TAG(v) (((v) >> 18) & 0x03)
|
|
#define GET_SY(v) (((v) >> 20) & 0x0f)
|
|
#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
|
|
|
|
static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_queue_iso *a = &arg->queue_iso;
|
|
struct fw_cdev_iso_packet __user *p, *end, *next;
|
|
struct fw_iso_context *ctx = client->iso_context;
|
|
unsigned long payload, buffer_end, transmit_header_bytes = 0;
|
|
u32 control;
|
|
int count;
|
|
struct {
|
|
struct fw_iso_packet packet;
|
|
u8 header[256];
|
|
} u;
|
|
|
|
if (ctx == NULL || a->handle != 0)
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* If the user passes a non-NULL data pointer, has mmap()'ed
|
|
* the iso buffer, and the pointer points inside the buffer,
|
|
* we setup the payload pointers accordingly. Otherwise we
|
|
* set them both to 0, which will still let packets with
|
|
* payload_length == 0 through. In other words, if no packets
|
|
* use the indirect payload, the iso buffer need not be mapped
|
|
* and the a->data pointer is ignored.
|
|
*/
|
|
payload = (unsigned long)a->data - client->vm_start;
|
|
buffer_end = client->buffer.page_count << PAGE_SHIFT;
|
|
if (a->data == 0 || client->buffer.pages == NULL ||
|
|
payload >= buffer_end) {
|
|
payload = 0;
|
|
buffer_end = 0;
|
|
}
|
|
|
|
if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3)
|
|
return -EINVAL;
|
|
|
|
p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
|
|
if (!access_ok(VERIFY_READ, p, a->size))
|
|
return -EFAULT;
|
|
|
|
end = (void __user *)p + a->size;
|
|
count = 0;
|
|
while (p < end) {
|
|
if (get_user(control, &p->control))
|
|
return -EFAULT;
|
|
u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
|
|
u.packet.interrupt = GET_INTERRUPT(control);
|
|
u.packet.skip = GET_SKIP(control);
|
|
u.packet.tag = GET_TAG(control);
|
|
u.packet.sy = GET_SY(control);
|
|
u.packet.header_length = GET_HEADER_LENGTH(control);
|
|
|
|
switch (ctx->type) {
|
|
case FW_ISO_CONTEXT_TRANSMIT:
|
|
if (u.packet.header_length & 3)
|
|
return -EINVAL;
|
|
transmit_header_bytes = u.packet.header_length;
|
|
break;
|
|
|
|
case FW_ISO_CONTEXT_RECEIVE:
|
|
if (u.packet.header_length == 0 ||
|
|
u.packet.header_length % ctx->header_size != 0)
|
|
return -EINVAL;
|
|
break;
|
|
|
|
case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
|
|
if (u.packet.payload_length == 0 ||
|
|
u.packet.payload_length & 3)
|
|
return -EINVAL;
|
|
break;
|
|
}
|
|
|
|
next = (struct fw_cdev_iso_packet __user *)
|
|
&p->header[transmit_header_bytes / 4];
|
|
if (next > end)
|
|
return -EINVAL;
|
|
if (__copy_from_user
|
|
(u.packet.header, p->header, transmit_header_bytes))
|
|
return -EFAULT;
|
|
if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
|
|
u.packet.header_length + u.packet.payload_length > 0)
|
|
return -EINVAL;
|
|
if (payload + u.packet.payload_length > buffer_end)
|
|
return -EINVAL;
|
|
|
|
if (fw_iso_context_queue(ctx, &u.packet,
|
|
&client->buffer, payload))
|
|
break;
|
|
|
|
p = next;
|
|
payload += u.packet.payload_length;
|
|
count++;
|
|
}
|
|
fw_iso_context_queue_flush(ctx);
|
|
|
|
a->size -= uptr_to_u64(p) - a->packets;
|
|
a->packets = uptr_to_u64(p);
|
|
a->data = client->vm_start + payload;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_start_iso *a = &arg->start_iso;
|
|
|
|
BUILD_BUG_ON(
|
|
FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 ||
|
|
FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 ||
|
|
FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 ||
|
|
FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 ||
|
|
FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS);
|
|
|
|
if (client->iso_context == NULL || a->handle != 0)
|
|
return -EINVAL;
|
|
|
|
if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
|
|
(a->tags == 0 || a->tags > 15 || a->sync > 15))
|
|
return -EINVAL;
|
|
|
|
return fw_iso_context_start(client->iso_context,
|
|
a->cycle, a->sync, a->tags);
|
|
}
|
|
|
|
static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_stop_iso *a = &arg->stop_iso;
|
|
|
|
if (client->iso_context == NULL || a->handle != 0)
|
|
return -EINVAL;
|
|
|
|
return fw_iso_context_stop(client->iso_context);
|
|
}
|
|
|
|
static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_flush_iso *a = &arg->flush_iso;
|
|
|
|
if (client->iso_context == NULL || a->handle != 0)
|
|
return -EINVAL;
|
|
|
|
return fw_iso_context_flush_completions(client->iso_context);
|
|
}
|
|
|
|
static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
|
|
struct fw_card *card = client->device->card;
|
|
struct timespec ts = {0, 0};
|
|
u32 cycle_time;
|
|
int ret = 0;
|
|
|
|
local_irq_disable();
|
|
|
|
cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
|
|
|
|
switch (a->clk_id) {
|
|
case CLOCK_REALTIME: getnstimeofday(&ts); break;
|
|
case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break;
|
|
case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
|
|
local_irq_enable();
|
|
|
|
a->tv_sec = ts.tv_sec;
|
|
a->tv_nsec = ts.tv_nsec;
|
|
a->cycle_timer = cycle_time;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
|
|
struct fw_cdev_get_cycle_timer2 ct2;
|
|
|
|
ct2.clk_id = CLOCK_REALTIME;
|
|
ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
|
|
|
|
a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
|
|
a->cycle_timer = ct2.cycle_timer;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void iso_resource_work(struct work_struct *work)
|
|
{
|
|
struct iso_resource_event *e;
|
|
struct iso_resource *r =
|
|
container_of(work, struct iso_resource, work.work);
|
|
struct client *client = r->client;
|
|
int generation, channel, bandwidth, todo;
|
|
bool skip, free, success;
|
|
|
|
spin_lock_irq(&client->lock);
|
|
generation = client->device->generation;
|
|
todo = r->todo;
|
|
/* Allow 1000ms grace period for other reallocations. */
|
|
if (todo == ISO_RES_ALLOC &&
|
|
time_before64(get_jiffies_64(),
|
|
client->device->card->reset_jiffies + HZ)) {
|
|
schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
|
|
skip = true;
|
|
} else {
|
|
/* We could be called twice within the same generation. */
|
|
skip = todo == ISO_RES_REALLOC &&
|
|
r->generation == generation;
|
|
}
|
|
free = todo == ISO_RES_DEALLOC ||
|
|
todo == ISO_RES_ALLOC_ONCE ||
|
|
todo == ISO_RES_DEALLOC_ONCE;
|
|
r->generation = generation;
|
|
spin_unlock_irq(&client->lock);
|
|
|
|
if (skip)
|
|
goto out;
|
|
|
|
bandwidth = r->bandwidth;
|
|
|
|
fw_iso_resource_manage(client->device->card, generation,
|
|
r->channels, &channel, &bandwidth,
|
|
todo == ISO_RES_ALLOC ||
|
|
todo == ISO_RES_REALLOC ||
|
|
todo == ISO_RES_ALLOC_ONCE);
|
|
/*
|
|
* Is this generation outdated already? As long as this resource sticks
|
|
* in the idr, it will be scheduled again for a newer generation or at
|
|
* shutdown.
|
|
*/
|
|
if (channel == -EAGAIN &&
|
|
(todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
|
|
goto out;
|
|
|
|
success = channel >= 0 || bandwidth > 0;
|
|
|
|
spin_lock_irq(&client->lock);
|
|
/*
|
|
* Transit from allocation to reallocation, except if the client
|
|
* requested deallocation in the meantime.
|
|
*/
|
|
if (r->todo == ISO_RES_ALLOC)
|
|
r->todo = ISO_RES_REALLOC;
|
|
/*
|
|
* Allocation or reallocation failure? Pull this resource out of the
|
|
* idr and prepare for deletion, unless the client is shutting down.
|
|
*/
|
|
if (r->todo == ISO_RES_REALLOC && !success &&
|
|
!client->in_shutdown &&
|
|
idr_find(&client->resource_idr, r->resource.handle)) {
|
|
idr_remove(&client->resource_idr, r->resource.handle);
|
|
client_put(client);
|
|
free = true;
|
|
}
|
|
spin_unlock_irq(&client->lock);
|
|
|
|
if (todo == ISO_RES_ALLOC && channel >= 0)
|
|
r->channels = 1ULL << channel;
|
|
|
|
if (todo == ISO_RES_REALLOC && success)
|
|
goto out;
|
|
|
|
if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
|
|
e = r->e_alloc;
|
|
r->e_alloc = NULL;
|
|
} else {
|
|
e = r->e_dealloc;
|
|
r->e_dealloc = NULL;
|
|
}
|
|
e->iso_resource.handle = r->resource.handle;
|
|
e->iso_resource.channel = channel;
|
|
e->iso_resource.bandwidth = bandwidth;
|
|
|
|
queue_event(client, &e->event,
|
|
&e->iso_resource, sizeof(e->iso_resource), NULL, 0);
|
|
|
|
if (free) {
|
|
cancel_delayed_work(&r->work);
|
|
kfree(r->e_alloc);
|
|
kfree(r->e_dealloc);
|
|
kfree(r);
|
|
}
|
|
out:
|
|
client_put(client);
|
|
}
|
|
|
|
static void release_iso_resource(struct client *client,
|
|
struct client_resource *resource)
|
|
{
|
|
struct iso_resource *r =
|
|
container_of(resource, struct iso_resource, resource);
|
|
|
|
spin_lock_irq(&client->lock);
|
|
r->todo = ISO_RES_DEALLOC;
|
|
schedule_iso_resource(r, 0);
|
|
spin_unlock_irq(&client->lock);
|
|
}
|
|
|
|
static int init_iso_resource(struct client *client,
|
|
struct fw_cdev_allocate_iso_resource *request, int todo)
|
|
{
|
|
struct iso_resource_event *e1, *e2;
|
|
struct iso_resource *r;
|
|
int ret;
|
|
|
|
if ((request->channels == 0 && request->bandwidth == 0) ||
|
|
request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL ||
|
|
request->bandwidth < 0)
|
|
return -EINVAL;
|
|
|
|
r = kmalloc(sizeof(*r), GFP_KERNEL);
|
|
e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
|
|
e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
|
|
if (r == NULL || e1 == NULL || e2 == NULL) {
|
|
ret = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&r->work, iso_resource_work);
|
|
r->client = client;
|
|
r->todo = todo;
|
|
r->generation = -1;
|
|
r->channels = request->channels;
|
|
r->bandwidth = request->bandwidth;
|
|
r->e_alloc = e1;
|
|
r->e_dealloc = e2;
|
|
|
|
e1->iso_resource.closure = request->closure;
|
|
e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
|
|
e2->iso_resource.closure = request->closure;
|
|
e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
|
|
|
|
if (todo == ISO_RES_ALLOC) {
|
|
r->resource.release = release_iso_resource;
|
|
ret = add_client_resource(client, &r->resource, GFP_KERNEL);
|
|
if (ret < 0)
|
|
goto fail;
|
|
} else {
|
|
r->resource.release = NULL;
|
|
r->resource.handle = -1;
|
|
schedule_iso_resource(r, 0);
|
|
}
|
|
request->handle = r->resource.handle;
|
|
|
|
return 0;
|
|
fail:
|
|
kfree(r);
|
|
kfree(e1);
|
|
kfree(e2);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ioctl_allocate_iso_resource(struct client *client,
|
|
union ioctl_arg *arg)
|
|
{
|
|
return init_iso_resource(client,
|
|
&arg->allocate_iso_resource, ISO_RES_ALLOC);
|
|
}
|
|
|
|
static int ioctl_deallocate_iso_resource(struct client *client,
|
|
union ioctl_arg *arg)
|
|
{
|
|
return release_client_resource(client,
|
|
arg->deallocate.handle, release_iso_resource, NULL);
|
|
}
|
|
|
|
static int ioctl_allocate_iso_resource_once(struct client *client,
|
|
union ioctl_arg *arg)
|
|
{
|
|
return init_iso_resource(client,
|
|
&arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
|
|
}
|
|
|
|
static int ioctl_deallocate_iso_resource_once(struct client *client,
|
|
union ioctl_arg *arg)
|
|
{
|
|
return init_iso_resource(client,
|
|
&arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
|
|
}
|
|
|
|
/*
|
|
* Returns a speed code: Maximum speed to or from this device,
|
|
* limited by the device's link speed, the local node's link speed,
|
|
* and all PHY port speeds between the two links.
|
|
*/
|
|
static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
return client->device->max_speed;
|
|
}
|
|
|
|
static int ioctl_send_broadcast_request(struct client *client,
|
|
union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_send_request *a = &arg->send_request;
|
|
|
|
switch (a->tcode) {
|
|
case TCODE_WRITE_QUADLET_REQUEST:
|
|
case TCODE_WRITE_BLOCK_REQUEST:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Security policy: Only allow accesses to Units Space. */
|
|
if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
|
|
return -EACCES;
|
|
|
|
return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
|
|
}
|
|
|
|
static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
|
|
struct fw_cdev_send_request request;
|
|
int dest;
|
|
|
|
if (a->speed > client->device->card->link_speed ||
|
|
a->length > 1024 << a->speed)
|
|
return -EIO;
|
|
|
|
if (a->tag > 3 || a->channel > 63 || a->sy > 15)
|
|
return -EINVAL;
|
|
|
|
dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
|
|
request.tcode = TCODE_STREAM_DATA;
|
|
request.length = a->length;
|
|
request.closure = a->closure;
|
|
request.data = a->data;
|
|
request.generation = a->generation;
|
|
|
|
return init_request(client, &request, dest, a->speed);
|
|
}
|
|
|
|
static void outbound_phy_packet_callback(struct fw_packet *packet,
|
|
struct fw_card *card, int status)
|
|
{
|
|
struct outbound_phy_packet_event *e =
|
|
container_of(packet, struct outbound_phy_packet_event, p);
|
|
|
|
switch (status) {
|
|
/* expected: */
|
|
case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break;
|
|
/* should never happen with PHY packets: */
|
|
case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break;
|
|
case ACK_BUSY_X:
|
|
case ACK_BUSY_A:
|
|
case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break;
|
|
case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break;
|
|
case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break;
|
|
/* stale generation; cancelled; on certain controllers: no ack */
|
|
default: e->phy_packet.rcode = status; break;
|
|
}
|
|
e->phy_packet.data[0] = packet->timestamp;
|
|
|
|
queue_event(e->client, &e->event, &e->phy_packet,
|
|
sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
|
|
client_put(e->client);
|
|
}
|
|
|
|
static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet;
|
|
struct fw_card *card = client->device->card;
|
|
struct outbound_phy_packet_event *e;
|
|
|
|
/* Access policy: Allow this ioctl only on local nodes' device files. */
|
|
if (!client->device->is_local)
|
|
return -ENOSYS;
|
|
|
|
e = kzalloc(sizeof(*e) + 4, GFP_KERNEL);
|
|
if (e == NULL)
|
|
return -ENOMEM;
|
|
|
|
client_get(client);
|
|
e->client = client;
|
|
e->p.speed = SCODE_100;
|
|
e->p.generation = a->generation;
|
|
e->p.header[0] = TCODE_LINK_INTERNAL << 4;
|
|
e->p.header[1] = a->data[0];
|
|
e->p.header[2] = a->data[1];
|
|
e->p.header_length = 12;
|
|
e->p.callback = outbound_phy_packet_callback;
|
|
e->phy_packet.closure = a->closure;
|
|
e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;
|
|
if (is_ping_packet(a->data))
|
|
e->phy_packet.length = 4;
|
|
|
|
card->driver->send_request(card, &e->p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
|
|
{
|
|
struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
|
|
struct fw_card *card = client->device->card;
|
|
|
|
/* Access policy: Allow this ioctl only on local nodes' device files. */
|
|
if (!client->device->is_local)
|
|
return -ENOSYS;
|
|
|
|
spin_lock_irq(&card->lock);
|
|
|
|
list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
|
|
client->phy_receiver_closure = a->closure;
|
|
|
|
spin_unlock_irq(&card->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
|
|
{
|
|
struct client *client;
|
|
struct inbound_phy_packet_event *e;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&card->lock, flags);
|
|
|
|
list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
|
|
e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
|
|
if (e == NULL) {
|
|
fw_notice(card, "out of memory when allocating event\n");
|
|
break;
|
|
}
|
|
e->phy_packet.closure = client->phy_receiver_closure;
|
|
e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
|
|
e->phy_packet.rcode = RCODE_COMPLETE;
|
|
e->phy_packet.length = 8;
|
|
e->phy_packet.data[0] = p->header[1];
|
|
e->phy_packet.data[1] = p->header[2];
|
|
queue_event(client, &e->event,
|
|
&e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&card->lock, flags);
|
|
}
|
|
|
|
static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
|
|
[0x00] = ioctl_get_info,
|
|
[0x01] = ioctl_send_request,
|
|
[0x02] = ioctl_allocate,
|
|
[0x03] = ioctl_deallocate,
|
|
[0x04] = ioctl_send_response,
|
|
[0x05] = ioctl_initiate_bus_reset,
|
|
[0x06] = ioctl_add_descriptor,
|
|
[0x07] = ioctl_remove_descriptor,
|
|
[0x08] = ioctl_create_iso_context,
|
|
[0x09] = ioctl_queue_iso,
|
|
[0x0a] = ioctl_start_iso,
|
|
[0x0b] = ioctl_stop_iso,
|
|
[0x0c] = ioctl_get_cycle_timer,
|
|
[0x0d] = ioctl_allocate_iso_resource,
|
|
[0x0e] = ioctl_deallocate_iso_resource,
|
|
[0x0f] = ioctl_allocate_iso_resource_once,
|
|
[0x10] = ioctl_deallocate_iso_resource_once,
|
|
[0x11] = ioctl_get_speed,
|
|
[0x12] = ioctl_send_broadcast_request,
|
|
[0x13] = ioctl_send_stream_packet,
|
|
[0x14] = ioctl_get_cycle_timer2,
|
|
[0x15] = ioctl_send_phy_packet,
|
|
[0x16] = ioctl_receive_phy_packets,
|
|
[0x17] = ioctl_set_iso_channels,
|
|
[0x18] = ioctl_flush_iso,
|
|
};
|
|
|
|
static int dispatch_ioctl(struct client *client,
|
|
unsigned int cmd, void __user *arg)
|
|
{
|
|
union ioctl_arg buffer;
|
|
int ret;
|
|
|
|
if (fw_device_is_shutdown(client->device))
|
|
return -ENODEV;
|
|
|
|
if (_IOC_TYPE(cmd) != '#' ||
|
|
_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) ||
|
|
_IOC_SIZE(cmd) > sizeof(buffer))
|
|
return -ENOTTY;
|
|
|
|
if (_IOC_DIR(cmd) == _IOC_READ)
|
|
memset(&buffer, 0, _IOC_SIZE(cmd));
|
|
|
|
if (_IOC_DIR(cmd) & _IOC_WRITE)
|
|
if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
|
|
return -EFAULT;
|
|
|
|
ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (_IOC_DIR(cmd) & _IOC_READ)
|
|
if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
|
|
return -EFAULT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static long fw_device_op_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static long fw_device_op_compat_ioctl(struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
|
|
}
|
|
#endif
|
|
|
|
static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct client *client = file->private_data;
|
|
unsigned long size;
|
|
int page_count, ret;
|
|
|
|
if (fw_device_is_shutdown(client->device))
|
|
return -ENODEV;
|
|
|
|
/* FIXME: We could support multiple buffers, but we don't. */
|
|
if (client->buffer.pages != NULL)
|
|
return -EBUSY;
|
|
|
|
if (!(vma->vm_flags & VM_SHARED))
|
|
return -EINVAL;
|
|
|
|
if (vma->vm_start & ~PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
client->vm_start = vma->vm_start;
|
|
size = vma->vm_end - vma->vm_start;
|
|
page_count = size >> PAGE_SHIFT;
|
|
if (size & ~PAGE_MASK)
|
|
return -EINVAL;
|
|
|
|
ret = fw_iso_buffer_alloc(&client->buffer, page_count);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
spin_lock_irq(&client->lock);
|
|
if (client->iso_context) {
|
|
ret = fw_iso_buffer_map_dma(&client->buffer,
|
|
client->device->card,
|
|
iso_dma_direction(client->iso_context));
|
|
client->buffer_is_mapped = (ret == 0);
|
|
}
|
|
spin_unlock_irq(&client->lock);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
ret = fw_iso_buffer_map_vma(&client->buffer, vma);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
return 0;
|
|
fail:
|
|
fw_iso_buffer_destroy(&client->buffer, client->device->card);
|
|
return ret;
|
|
}
|
|
|
|
static int is_outbound_transaction_resource(int id, void *p, void *data)
|
|
{
|
|
struct client_resource *resource = p;
|
|
|
|
return resource->release == release_transaction;
|
|
}
|
|
|
|
static int has_outbound_transactions(struct client *client)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock_irq(&client->lock);
|
|
ret = idr_for_each(&client->resource_idr,
|
|
is_outbound_transaction_resource, NULL);
|
|
spin_unlock_irq(&client->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int shutdown_resource(int id, void *p, void *data)
|
|
{
|
|
struct client_resource *resource = p;
|
|
struct client *client = data;
|
|
|
|
resource->release(client, resource);
|
|
client_put(client);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fw_device_op_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct client *client = file->private_data;
|
|
struct event *event, *next_event;
|
|
|
|
spin_lock_irq(&client->device->card->lock);
|
|
list_del(&client->phy_receiver_link);
|
|
spin_unlock_irq(&client->device->card->lock);
|
|
|
|
mutex_lock(&client->device->client_list_mutex);
|
|
list_del(&client->link);
|
|
mutex_unlock(&client->device->client_list_mutex);
|
|
|
|
if (client->iso_context)
|
|
fw_iso_context_destroy(client->iso_context);
|
|
|
|
if (client->buffer.pages)
|
|
fw_iso_buffer_destroy(&client->buffer, client->device->card);
|
|
|
|
/* Freeze client->resource_idr and client->event_list */
|
|
spin_lock_irq(&client->lock);
|
|
client->in_shutdown = true;
|
|
spin_unlock_irq(&client->lock);
|
|
|
|
wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
|
|
|
|
idr_for_each(&client->resource_idr, shutdown_resource, client);
|
|
idr_destroy(&client->resource_idr);
|
|
|
|
list_for_each_entry_safe(event, next_event, &client->event_list, link)
|
|
kfree(event);
|
|
|
|
client_put(client);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
|
|
{
|
|
struct client *client = file->private_data;
|
|
unsigned int mask = 0;
|
|
|
|
poll_wait(file, &client->wait, pt);
|
|
|
|
if (fw_device_is_shutdown(client->device))
|
|
mask |= POLLHUP | POLLERR;
|
|
if (!list_empty(&client->event_list))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
return mask;
|
|
}
|
|
|
|
const struct file_operations fw_device_ops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.open = fw_device_op_open,
|
|
.read = fw_device_op_read,
|
|
.unlocked_ioctl = fw_device_op_ioctl,
|
|
.mmap = fw_device_op_mmap,
|
|
.release = fw_device_op_release,
|
|
.poll = fw_device_op_poll,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = fw_device_op_compat_ioctl,
|
|
#endif
|
|
};
|