^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * AGPGART driver frontend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2004 Silicon Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2002-2003 Dave Jones
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1999 Jeff Hartmann
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1999 Precision Insight, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1999 Xi Graphics, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Permission is hereby granted, free of charge, to any person obtaining a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * copy of this software and associated documentation files (the "Software"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * to deal in the Software without restriction, including without limitation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * the rights to use, copy, modify, merge, publish, distribute, sublicense,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * and/or sell copies of the Software, and to permit persons to whom the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Software is furnished to do so, subject to the following conditions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * The above copyright notice and this permission notice shall be included
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * in all copies or substantial portions of the Software.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/miscdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/agp_backend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/agpgart.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include "agp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct agp_front_data agp_fe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct agp_memory *agp_find_mem_by_key(int key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct agp_memory *curr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (agp_fe.current_controller == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) curr = agp_fe.current_controller->pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) while (curr != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (curr->key == key)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) curr = curr->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) DBG("key=%d -> mem=%p", key, curr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return curr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static void agp_remove_from_pool(struct agp_memory *temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct agp_memory *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct agp_memory *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* Check to see if this is even in the memory pool */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) DBG("mem=%p", temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (agp_find_mem_by_key(temp->key) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) next = temp->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) prev = temp->prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (prev != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) prev->next = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (next != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) next->prev = prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /* This is the first item on the list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (next != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) next->prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) agp_fe.current_controller->pool = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * Routines for managing each client's segment list -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * These routines handle adding and removing segments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * to each auth'ed client.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) agp_segment_priv *agp_find_seg_in_client(const struct agp_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) unsigned long offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) int size, pgprot_t page_prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct agp_segment_priv *seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) off_t pg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) size_t pg_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) pg_start = offset / 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) pg_count = size / 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) seg = *(client->segments);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) for (i = 0; i < client->num_segments; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if ((seg[i].pg_start == pg_start) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) (seg[i].pg_count == pg_count) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) (pgprot_val(seg[i].prot) == pgprot_val(page_prot))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return seg + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static void agp_remove_seg_from_client(struct agp_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) DBG("client=%p", client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (client->segments != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (*(client->segments) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) DBG("Freeing %p from client %p", *(client->segments), client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) kfree(*(client->segments));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) DBG("Freeing %p from client %p", client->segments, client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) kfree(client->segments);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) client->segments = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static void agp_add_seg_to_client(struct agp_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct agp_segment_priv ** seg, int num_segments)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) struct agp_segment_priv **prev_seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) prev_seg = client->segments;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (prev_seg != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) agp_remove_seg_from_client(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) DBG("Adding seg %p (%d segments) to client %p", seg, num_segments, client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) client->num_segments = num_segments;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) client->segments = seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static pgprot_t agp_convert_mmap_flags(int prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) unsigned long prot_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) prot_bits = calc_vm_prot_bits(prot, 0) | VM_SHARED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return vm_get_page_prot(prot_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int agp_create_segment(struct agp_client *client, struct agp_region *region)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct agp_segment_priv **ret_seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct agp_segment_priv *seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct agp_segment *user_seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) seg = kzalloc((sizeof(struct agp_segment_priv) * region->seg_count), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (seg == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) kfree(region->seg_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) region->seg_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) user_seg = region->seg_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) for (i = 0; i < region->seg_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) seg[i].pg_start = user_seg[i].pg_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) seg[i].pg_count = user_seg[i].pg_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) seg[i].prot = agp_convert_mmap_flags(user_seg[i].prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) kfree(region->seg_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) region->seg_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ret_seg = kmalloc(sizeof(void *), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (ret_seg == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) kfree(seg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) *ret_seg = seg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) agp_add_seg_to_client(client, ret_seg, region->seg_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /* End - Routines for managing each client's segment list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) /* This function must only be called when current_controller != NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static void agp_insert_into_pool(struct agp_memory * temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct agp_memory *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) prev = agp_fe.current_controller->pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (prev != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) prev->prev = temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) temp->next = prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) agp_fe.current_controller->pool = temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /* File private list routines */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct agp_file_private *agp_find_private(pid_t pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct agp_file_private *curr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) curr = agp_fe.file_priv_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) while (curr != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (curr->my_pid == pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) return curr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) curr = curr->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static void agp_insert_file_private(struct agp_file_private * priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) struct agp_file_private *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) prev = agp_fe.file_priv_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (prev != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) prev->prev = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) priv->next = prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) agp_fe.file_priv_list = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) static void agp_remove_file_private(struct agp_file_private * priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct agp_file_private *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct agp_file_private *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) next = priv->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) prev = priv->prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (prev != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) prev->next = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (next != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) next->prev = prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (next != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) next->prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) agp_fe.file_priv_list = next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) /* End - File flag list routines */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * Wrappers for agp_free_memory & agp_allocate_memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * These make sure that internal lists are kept updated.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) void agp_free_memory_wrap(struct agp_memory *memory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) agp_remove_from_pool(memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) agp_free_memory(memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) struct agp_memory *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) memory = agp_allocate_memory(agp_bridge, pg_count, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (memory == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) agp_insert_into_pool(memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) /* Routines for managing the list of controllers -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) * These routines manage the current controller, and the list of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) * controllers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static struct agp_controller *agp_find_controller_by_pid(pid_t id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct agp_controller *controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) controller = agp_fe.controllers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) while (controller != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (controller->pid == id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) controller = controller->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static struct agp_controller *agp_create_controller(pid_t id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) struct agp_controller *controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) controller = kzalloc(sizeof(struct agp_controller), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (controller == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) controller->pid = id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static int agp_insert_controller(struct agp_controller *controller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) struct agp_controller *prev_controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) prev_controller = agp_fe.controllers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) controller->next = prev_controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (prev_controller != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) prev_controller->prev = controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) agp_fe.controllers = controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) static void agp_remove_all_clients(struct agp_controller *controller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) struct agp_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) struct agp_client *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) client = controller->clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) while (client) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) struct agp_file_private *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) temp = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) agp_remove_seg_from_client(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) priv = agp_find_private(temp->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (priv != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) clear_bit(AGP_FF_IS_VALID, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) clear_bit(AGP_FF_IS_CLIENT, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) client = client->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) kfree(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static void agp_remove_all_memory(struct agp_controller *controller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) struct agp_memory *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) struct agp_memory *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) memory = controller->pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) while (memory) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) temp = memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) memory = memory->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) agp_free_memory_wrap(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) static int agp_remove_controller(struct agp_controller *controller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) struct agp_controller *prev_controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) struct agp_controller *next_controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) prev_controller = controller->prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) next_controller = controller->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (prev_controller != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) prev_controller->next = next_controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (next_controller != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) next_controller->prev = prev_controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (next_controller != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) next_controller->prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) agp_fe.controllers = next_controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) agp_remove_all_memory(controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) agp_remove_all_clients(controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (agp_fe.current_controller == controller) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) agp_fe.current_controller = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) agp_fe.backend_acquired = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) agp_backend_release(agp_bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) kfree(controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) static void agp_controller_make_current(struct agp_controller *controller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) struct agp_client *clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) clients = controller->clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) while (clients != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) struct agp_file_private *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) priv = agp_find_private(clients->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (priv != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) set_bit(AGP_FF_IS_VALID, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) set_bit(AGP_FF_IS_CLIENT, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) clients = clients->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) agp_fe.current_controller = controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) static void agp_controller_release_current(struct agp_controller *controller,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) struct agp_file_private *controller_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) struct agp_client *clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) clear_bit(AGP_FF_IS_VALID, &controller_priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) clients = controller->clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) while (clients != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) struct agp_file_private *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) priv = agp_find_private(clients->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) if (priv != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) clear_bit(AGP_FF_IS_VALID, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) clients = clients->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) agp_fe.current_controller = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) agp_fe.used_by_controller = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) agp_backend_release(agp_bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * Routines for managing client lists -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * These routines are for managing the list of auth'ed clients.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) static struct agp_client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) *agp_find_client_in_controller(struct agp_controller *controller, pid_t id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct agp_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (controller == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) client = controller->clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) while (client != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (client->pid == id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) client = client->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) static struct agp_controller *agp_find_controller_for_client(pid_t id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) struct agp_controller *controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) controller = agp_fe.controllers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) while (controller != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if ((agp_find_client_in_controller(controller, id)) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) controller = controller->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) struct agp_client *agp_find_client_by_pid(pid_t id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct agp_client *temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (agp_fe.current_controller == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) temp = agp_find_client_in_controller(agp_fe.current_controller, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) static void agp_insert_client(struct agp_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) struct agp_client *prev_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) prev_client = agp_fe.current_controller->clients;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) client->next = prev_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (prev_client != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) prev_client->prev = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) agp_fe.current_controller->clients = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) agp_fe.current_controller->num_clients++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) struct agp_client *agp_create_client(pid_t id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) struct agp_client *new_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) new_client = kzalloc(sizeof(struct agp_client), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (new_client == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) new_client->pid = id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) agp_insert_client(new_client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return new_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) int agp_remove_client(pid_t id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) struct agp_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) struct agp_client *prev_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) struct agp_client *next_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) struct agp_controller *controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) controller = agp_find_controller_for_client(id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (controller == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) client = agp_find_client_in_controller(controller, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (client == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) prev_client = client->prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) next_client = client->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (prev_client != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) prev_client->next = next_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) if (next_client != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) next_client->prev = prev_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (next_client != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) next_client->prev = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) controller->clients = next_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) controller->num_clients--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) agp_remove_seg_from_client(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) kfree(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) /* End - Routines for managing client lists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* File Operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) static int agp_mmap(struct file *file, struct vm_area_struct *vma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) unsigned int size, current_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) struct agp_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct agp_file_private *priv = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct agp_kern_info kerninfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) mutex_lock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) if (agp_fe.backend_acquired != true)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) goto out_eperm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (!(test_bit(AGP_FF_IS_VALID, &priv->access_flags)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) goto out_eperm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) agp_copy_info(agp_bridge, &kerninfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) size = vma->vm_end - vma->vm_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) current_size = kerninfo.aper_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) current_size = current_size * 0x100000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) offset = vma->vm_pgoff << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) DBG("%lx:%lx", offset, offset+size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if ((size + offset) > current_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) goto out_inval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) client = agp_find_client_by_pid(current->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) if (client == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) goto out_eperm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) if (!agp_find_seg_in_client(client, offset, size, vma->vm_page_prot))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) goto out_inval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) DBG("client vm_ops=%p", kerninfo.vm_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (kerninfo.vm_ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) vma->vm_ops = kerninfo.vm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) } else if (io_remap_pfn_range(vma, vma->vm_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) (kerninfo.aper_base + offset) >> PAGE_SHIFT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) pgprot_writecombine(vma->vm_page_prot))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) goto out_again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (size != current_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) goto out_inval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) DBG("controller vm_ops=%p", kerninfo.vm_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (kerninfo.vm_ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) vma->vm_ops = kerninfo.vm_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) } else if (io_remap_pfn_range(vma, vma->vm_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) kerninfo.aper_base >> PAGE_SHIFT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) pgprot_writecombine(vma->vm_page_prot))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) goto out_again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) out_eperm:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) out_inval:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) out_again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) static int agp_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) struct agp_file_private *priv = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) mutex_lock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) DBG("priv=%p", priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) struct agp_controller *controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) controller = agp_find_controller_by_pid(priv->my_pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) if (controller != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) if (controller == agp_fe.current_controller)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) agp_controller_release_current(controller, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) agp_remove_controller(controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) controller = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) agp_remove_client(priv->my_pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) agp_remove_file_private(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) kfree(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) file->private_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) static int agp_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) int minor = iminor(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) struct agp_file_private *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) struct agp_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (minor != AGPGART_MINOR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) mutex_lock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) priv = kzalloc(sizeof(struct agp_file_private), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (priv == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) set_bit(AGP_FF_ALLOW_CLIENT, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) priv->my_pid = current->pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) if (capable(CAP_SYS_RAWIO))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) /* Root priv, can be controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) set_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) client = agp_find_client_by_pid(current->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (client != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) set_bit(AGP_FF_IS_CLIENT, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) set_bit(AGP_FF_IS_VALID, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) file->private_data = (void *) priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) agp_insert_file_private(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) DBG("private=%p, client=%p", priv, client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) static int agpioc_info_wrap(struct agp_file_private *priv, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) struct agp_info userinfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct agp_kern_info kerninfo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) agp_copy_info(agp_bridge, &kerninfo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) memset(&userinfo, 0, sizeof(userinfo));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) userinfo.version.major = kerninfo.version.major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) userinfo.version.minor = kerninfo.version.minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) userinfo.bridge_id = kerninfo.device->vendor |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) (kerninfo.device->device << 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) userinfo.agp_mode = kerninfo.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) userinfo.aper_base = kerninfo.aper_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) userinfo.aper_size = kerninfo.aper_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) userinfo.pg_used = kerninfo.current_memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) if (copy_to_user(arg, &userinfo, sizeof(struct agp_info)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) int agpioc_acquire_wrap(struct agp_file_private *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) struct agp_controller *controller;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) if (!(test_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (agp_fe.current_controller != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (!agp_bridge)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) if (atomic_read(&agp_bridge->agp_in_use))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) atomic_inc(&agp_bridge->agp_in_use);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) agp_fe.backend_acquired = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) controller = agp_find_controller_by_pid(priv->my_pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) if (controller != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) agp_controller_make_current(controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) controller = agp_create_controller(priv->my_pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) if (controller == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) agp_fe.backend_acquired = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) agp_backend_release(agp_bridge);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) agp_insert_controller(controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) agp_controller_make_current(controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) set_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) set_bit(AGP_FF_IS_VALID, &priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) int agpioc_release_wrap(struct agp_file_private *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) agp_controller_release_current(agp_fe.current_controller, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) int agpioc_setup_wrap(struct agp_file_private *priv, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) struct agp_setup mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) if (copy_from_user(&mode, arg, sizeof(struct agp_setup)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) agp_enable(agp_bridge, mode.agp_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) static int agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) struct agp_region reserve;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) struct agp_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) struct agp_file_private *client_priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) if (copy_from_user(&reserve, arg, sizeof(struct agp_region)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) if ((unsigned) reserve.seg_count >= ~0U/sizeof(struct agp_segment))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) client = agp_find_client_by_pid(reserve.pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if (reserve.seg_count == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) /* remove a client */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) client_priv = agp_find_private(reserve.pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) if (client_priv != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) if (client == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) /* client is already removed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) return agp_remove_client(reserve.pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) struct agp_segment *segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) if (reserve.seg_count >= 16384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) segment = kmalloc((sizeof(struct agp_segment) * reserve.seg_count),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) if (segment == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) if (copy_from_user(segment, (void __user *) reserve.seg_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) sizeof(struct agp_segment) * reserve.seg_count)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) kfree(segment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) reserve.seg_list = segment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (client == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) /* Create the client and add the segment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) client = agp_create_client(reserve.pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) if (client == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) kfree(segment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) client_priv = agp_find_private(reserve.pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (client_priv != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) return agp_create_segment(client, &reserve);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) /* Will never really happen */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) int agpioc_protect_wrap(struct agp_file_private *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) /* This function is not currently implemented */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) static int agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) struct agp_memory *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) struct agp_allocate alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) if (copy_from_user(&alloc, arg, sizeof(struct agp_allocate)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) if (alloc.type >= AGP_USER_TYPES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) memory = agp_allocate_memory_wrap(alloc.pg_count, alloc.type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) if (memory == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) alloc.key = memory->key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) alloc.physical = memory->physical;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (copy_to_user(arg, &alloc, sizeof(struct agp_allocate))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) agp_free_memory_wrap(memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) int agpioc_deallocate_wrap(struct agp_file_private *priv, int arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) struct agp_memory *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) memory = agp_find_mem_by_key(arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) if (memory == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) agp_free_memory_wrap(memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) static int agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) struct agp_bind bind_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) struct agp_memory *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (copy_from_user(&bind_info, arg, sizeof(struct agp_bind)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) memory = agp_find_mem_by_key(bind_info.key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) if (memory == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) return agp_bind_memory(memory, bind_info.pg_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) static int agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct agp_memory *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) struct agp_unbind unbind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) DBG("");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) if (copy_from_user(&unbind, arg, sizeof(struct agp_unbind)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) memory = agp_find_mem_by_key(unbind.key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) if (memory == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) return agp_unbind_memory(memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) static long agp_ioctl(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) struct agp_file_private *curr_priv = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) int ret_val = -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) DBG("priv=%p, cmd=%x", curr_priv, cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) mutex_lock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) if ((agp_fe.current_controller == NULL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) (cmd != AGPIOC_ACQUIRE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) ret_val = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) goto ioctl_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if ((agp_fe.backend_acquired != true) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) (cmd != AGPIOC_ACQUIRE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) ret_val = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) goto ioctl_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (cmd != AGPIOC_ACQUIRE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) if (!(test_bit(AGP_FF_IS_CONTROLLER, &curr_priv->access_flags))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) ret_val = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) goto ioctl_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) /* Use the original pid of the controller,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) * in case it's threaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) if (agp_fe.current_controller->pid != curr_priv->my_pid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) ret_val = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) goto ioctl_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) case AGPIOC_INFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) ret_val = agpioc_info_wrap(curr_priv, (void __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) case AGPIOC_ACQUIRE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) ret_val = agpioc_acquire_wrap(curr_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) case AGPIOC_RELEASE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) ret_val = agpioc_release_wrap(curr_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) case AGPIOC_SETUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) case AGPIOC_RESERVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) ret_val = agpioc_reserve_wrap(curr_priv, (void __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) case AGPIOC_PROTECT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) ret_val = agpioc_protect_wrap(curr_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) case AGPIOC_ALLOCATE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) ret_val = agpioc_allocate_wrap(curr_priv, (void __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) case AGPIOC_DEALLOCATE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) case AGPIOC_BIND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) ret_val = agpioc_bind_wrap(curr_priv, (void __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) case AGPIOC_UNBIND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) ret_val = agpioc_unbind_wrap(curr_priv, (void __user *) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) case AGPIOC_CHIPSET_FLUSH:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) ioctl_out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) DBG("ioctl returns %d\n", ret_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) mutex_unlock(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) return ret_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) static const struct file_operations agp_fops =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) .llseek = no_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) .unlocked_ioctl = agp_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) .compat_ioctl = compat_agp_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) .mmap = agp_mmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) .open = agp_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) .release = agp_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) static struct miscdevice agp_miscdev =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) .minor = AGPGART_MINOR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) .name = "agpgart",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) .fops = &agp_fops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) int agp_frontend_initialize(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) memset(&agp_fe, 0, sizeof(struct agp_front_data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) mutex_init(&(agp_fe.agp_mutex));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) if (misc_register(&agp_miscdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) printk(KERN_ERR PFX "unable to get minor: %d\n", AGPGART_MINOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) void agp_frontend_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) misc_deregister(&agp_miscdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags