Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1 | /* |
| 2 | * VME Bridge Framework |
| 3 | * |
Martyn Welch | 66bd8db | 2010-02-18 15:12:52 +0000 | [diff] [blame] | 4 | * Author: Martyn Welch <martyn.welch@ge.com> |
| 5 | * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc. |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 6 | * |
| 7 | * Based on work by Tom Armistead and Ajit Prem |
| 8 | * Copyright 2004 Motorola Inc. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | */ |
| 15 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/moduleparam.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/pci.h> |
| 23 | #include <linux/poll.h> |
| 24 | #include <linux/highmem.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/pagemap.h> |
| 27 | #include <linux/device.h> |
| 28 | #include <linux/dma-mapping.h> |
| 29 | #include <linux/syscalls.h> |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 30 | #include <linux/mutex.h> |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 32 | #include <linux/slab.h> |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 33 | |
| 34 | #include "vme.h" |
| 35 | #include "vme_bridge.h" |
| 36 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 37 | /* Bitmask and mutex to keep track of bridge numbers */ |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 38 | static unsigned int vme_bus_numbers; |
Bill Pemberton | 1fe923e | 2010-04-28 16:40:10 -0400 | [diff] [blame] | 39 | static DEFINE_MUTEX(vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 40 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 41 | static void __exit vme_exit(void); |
| 42 | static int __init vme_init(void); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 43 | |
| 44 | |
| 45 | /* |
| 46 | * Find the bridge resource associated with a specific device resource |
| 47 | */ |
| 48 | static struct vme_bridge *dev_to_bridge(struct device *dev) |
| 49 | { |
| 50 | return dev->platform_data; |
| 51 | } |
| 52 | |
| 53 | /* |
| 54 | * Find the bridge that the resource is associated with. |
| 55 | */ |
| 56 | static struct vme_bridge *find_bridge(struct vme_resource *resource) |
| 57 | { |
| 58 | /* Get list to search */ |
| 59 | switch (resource->type) { |
| 60 | case VME_MASTER: |
| 61 | return list_entry(resource->entry, struct vme_master_resource, |
| 62 | list)->parent; |
| 63 | break; |
| 64 | case VME_SLAVE: |
| 65 | return list_entry(resource->entry, struct vme_slave_resource, |
| 66 | list)->parent; |
| 67 | break; |
| 68 | case VME_DMA: |
| 69 | return list_entry(resource->entry, struct vme_dma_resource, |
| 70 | list)->parent; |
| 71 | break; |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 72 | case VME_LM: |
| 73 | return list_entry(resource->entry, struct vme_lm_resource, |
| 74 | list)->parent; |
| 75 | break; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 76 | default: |
| 77 | printk(KERN_ERR "Unknown resource type\n"); |
| 78 | return NULL; |
| 79 | break; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * Allocate a contiguous block of memory for use by the driver. This is used to |
| 85 | * create the buffers for the slave windows. |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 86 | */ |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 87 | void *vme_alloc_consistent(struct vme_resource *resource, size_t size, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 88 | dma_addr_t *dma) |
| 89 | { |
| 90 | struct vme_bridge *bridge; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 91 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 92 | if (resource == NULL) { |
| 93 | printk(KERN_ERR "No resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 94 | return NULL; |
| 95 | } |
| 96 | |
| 97 | bridge = find_bridge(resource); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 98 | if (bridge == NULL) { |
| 99 | printk(KERN_ERR "Can't find bridge\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 100 | return NULL; |
| 101 | } |
| 102 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 103 | if (bridge->parent == NULL) { |
Manohar Vanga | 7f58f02 | 2011-08-10 11:33:46 +0200 | [diff] [blame^] | 104 | printk(KERN_ERR "Dev entry NULL for" |
| 105 | " bridge %s\n", bridge->name); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 106 | return NULL; |
| 107 | } |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 108 | |
Manohar Vanga | 7f58f02 | 2011-08-10 11:33:46 +0200 | [diff] [blame^] | 109 | if (bridge->alloc_consistent == NULL) { |
| 110 | printk(KERN_ERR "alloc_consistent not supported by" |
| 111 | " bridge %s\n", bridge->name); |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | return bridge->alloc_consistent(bridge->parent, size, dma); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 116 | } |
| 117 | EXPORT_SYMBOL(vme_alloc_consistent); |
| 118 | |
| 119 | /* |
| 120 | * Free previously allocated contiguous block of memory. |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 121 | */ |
| 122 | void vme_free_consistent(struct vme_resource *resource, size_t size, |
| 123 | void *vaddr, dma_addr_t dma) |
| 124 | { |
| 125 | struct vme_bridge *bridge; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 126 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 127 | if (resource == NULL) { |
| 128 | printk(KERN_ERR "No resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 129 | return; |
| 130 | } |
| 131 | |
| 132 | bridge = find_bridge(resource); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 133 | if (bridge == NULL) { |
| 134 | printk(KERN_ERR "Can't find bridge\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 135 | return; |
| 136 | } |
| 137 | |
Manohar Vanga | 7f58f02 | 2011-08-10 11:33:46 +0200 | [diff] [blame^] | 138 | if (bridge->parent == NULL) { |
| 139 | printk(KERN_ERR "Dev entry NULL for" |
| 140 | " bridge %s\n", bridge->name); |
| 141 | return; |
| 142 | } |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 143 | |
Manohar Vanga | 7f58f02 | 2011-08-10 11:33:46 +0200 | [diff] [blame^] | 144 | if (bridge->free_consistent == NULL) { |
| 145 | printk(KERN_ERR "free_consistent not supported by" |
| 146 | " bridge %s\n", bridge->name); |
| 147 | return; |
| 148 | } |
| 149 | |
| 150 | bridge->free_consistent(bridge->parent, size, vaddr, dma); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 151 | } |
| 152 | EXPORT_SYMBOL(vme_free_consistent); |
| 153 | |
| 154 | size_t vme_get_size(struct vme_resource *resource) |
| 155 | { |
| 156 | int enabled, retval; |
| 157 | unsigned long long base, size; |
| 158 | dma_addr_t buf_base; |
| 159 | vme_address_t aspace; |
| 160 | vme_cycle_t cycle; |
| 161 | vme_width_t dwidth; |
| 162 | |
| 163 | switch (resource->type) { |
| 164 | case VME_MASTER: |
| 165 | retval = vme_master_get(resource, &enabled, &base, &size, |
| 166 | &aspace, &cycle, &dwidth); |
| 167 | |
| 168 | return size; |
| 169 | break; |
| 170 | case VME_SLAVE: |
| 171 | retval = vme_slave_get(resource, &enabled, &base, &size, |
| 172 | &buf_base, &aspace, &cycle); |
| 173 | |
| 174 | return size; |
| 175 | break; |
| 176 | case VME_DMA: |
| 177 | return 0; |
| 178 | break; |
| 179 | default: |
| 180 | printk(KERN_ERR "Unknown resource type\n"); |
| 181 | return 0; |
| 182 | break; |
| 183 | } |
| 184 | } |
| 185 | EXPORT_SYMBOL(vme_get_size); |
| 186 | |
| 187 | static int vme_check_window(vme_address_t aspace, unsigned long long vme_base, |
| 188 | unsigned long long size) |
| 189 | { |
| 190 | int retval = 0; |
| 191 | |
| 192 | switch (aspace) { |
| 193 | case VME_A16: |
| 194 | if (((vme_base + size) > VME_A16_MAX) || |
| 195 | (vme_base > VME_A16_MAX)) |
| 196 | retval = -EFAULT; |
| 197 | break; |
| 198 | case VME_A24: |
| 199 | if (((vme_base + size) > VME_A24_MAX) || |
| 200 | (vme_base > VME_A24_MAX)) |
| 201 | retval = -EFAULT; |
| 202 | break; |
| 203 | case VME_A32: |
| 204 | if (((vme_base + size) > VME_A32_MAX) || |
| 205 | (vme_base > VME_A32_MAX)) |
| 206 | retval = -EFAULT; |
| 207 | break; |
| 208 | case VME_A64: |
| 209 | /* |
| 210 | * Any value held in an unsigned long long can be used as the |
| 211 | * base |
| 212 | */ |
| 213 | break; |
| 214 | case VME_CRCSR: |
| 215 | if (((vme_base + size) > VME_CRCSR_MAX) || |
| 216 | (vme_base > VME_CRCSR_MAX)) |
| 217 | retval = -EFAULT; |
| 218 | break; |
| 219 | case VME_USER1: |
| 220 | case VME_USER2: |
| 221 | case VME_USER3: |
| 222 | case VME_USER4: |
| 223 | /* User Defined */ |
| 224 | break; |
| 225 | default: |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 226 | printk(KERN_ERR "Invalid address space\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 227 | retval = -EINVAL; |
| 228 | break; |
| 229 | } |
| 230 | |
| 231 | return retval; |
| 232 | } |
| 233 | |
| 234 | /* |
| 235 | * Request a slave image with specific attributes, return some unique |
| 236 | * identifier. |
| 237 | */ |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 238 | struct vme_resource *vme_slave_request(struct device *dev, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 239 | vme_address_t address, vme_cycle_t cycle) |
| 240 | { |
| 241 | struct vme_bridge *bridge; |
| 242 | struct list_head *slave_pos = NULL; |
| 243 | struct vme_slave_resource *allocated_image = NULL; |
| 244 | struct vme_slave_resource *slave_image = NULL; |
| 245 | struct vme_resource *resource = NULL; |
| 246 | |
| 247 | bridge = dev_to_bridge(dev); |
| 248 | if (bridge == NULL) { |
| 249 | printk(KERN_ERR "Can't find VME bus\n"); |
| 250 | goto err_bus; |
| 251 | } |
| 252 | |
| 253 | /* Loop through slave resources */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 254 | list_for_each(slave_pos, &bridge->slave_resources) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 255 | slave_image = list_entry(slave_pos, |
| 256 | struct vme_slave_resource, list); |
| 257 | |
| 258 | if (slave_image == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 259 | printk(KERN_ERR "Registered NULL Slave resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 260 | continue; |
| 261 | } |
| 262 | |
| 263 | /* Find an unlocked and compatible image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 264 | mutex_lock(&slave_image->mtx); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 265 | if (((slave_image->address_attr & address) == address) && |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 266 | ((slave_image->cycle_attr & cycle) == cycle) && |
| 267 | (slave_image->locked == 0)) { |
| 268 | |
| 269 | slave_image->locked = 1; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 270 | mutex_unlock(&slave_image->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 271 | allocated_image = slave_image; |
| 272 | break; |
| 273 | } |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 274 | mutex_unlock(&slave_image->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | /* No free image */ |
| 278 | if (allocated_image == NULL) |
| 279 | goto err_image; |
| 280 | |
| 281 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 282 | if (resource == NULL) { |
| 283 | printk(KERN_WARNING "Unable to allocate resource structure\n"); |
| 284 | goto err_alloc; |
| 285 | } |
| 286 | resource->type = VME_SLAVE; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 287 | resource->entry = &allocated_image->list; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 288 | |
| 289 | return resource; |
| 290 | |
| 291 | err_alloc: |
| 292 | /* Unlock image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 293 | mutex_lock(&slave_image->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 294 | slave_image->locked = 0; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 295 | mutex_unlock(&slave_image->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 296 | err_image: |
| 297 | err_bus: |
| 298 | return NULL; |
| 299 | } |
| 300 | EXPORT_SYMBOL(vme_slave_request); |
| 301 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 302 | int vme_slave_set(struct vme_resource *resource, int enabled, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 303 | unsigned long long vme_base, unsigned long long size, |
| 304 | dma_addr_t buf_base, vme_address_t aspace, vme_cycle_t cycle) |
| 305 | { |
| 306 | struct vme_bridge *bridge = find_bridge(resource); |
| 307 | struct vme_slave_resource *image; |
| 308 | int retval; |
| 309 | |
| 310 | if (resource->type != VME_SLAVE) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 311 | printk(KERN_ERR "Not a slave resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 312 | return -EINVAL; |
| 313 | } |
| 314 | |
| 315 | image = list_entry(resource->entry, struct vme_slave_resource, list); |
| 316 | |
| 317 | if (bridge->slave_set == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 318 | printk(KERN_ERR "Function not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 319 | return -ENOSYS; |
| 320 | } |
| 321 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 322 | if (!(((image->address_attr & aspace) == aspace) && |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 323 | ((image->cycle_attr & cycle) == cycle))) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 324 | printk(KERN_ERR "Invalid attributes\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 325 | return -EINVAL; |
| 326 | } |
| 327 | |
| 328 | retval = vme_check_window(aspace, vme_base, size); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 329 | if (retval) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 330 | return retval; |
| 331 | |
| 332 | return bridge->slave_set(image, enabled, vme_base, size, buf_base, |
| 333 | aspace, cycle); |
| 334 | } |
| 335 | EXPORT_SYMBOL(vme_slave_set); |
| 336 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 337 | int vme_slave_get(struct vme_resource *resource, int *enabled, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 338 | unsigned long long *vme_base, unsigned long long *size, |
| 339 | dma_addr_t *buf_base, vme_address_t *aspace, vme_cycle_t *cycle) |
| 340 | { |
| 341 | struct vme_bridge *bridge = find_bridge(resource); |
| 342 | struct vme_slave_resource *image; |
| 343 | |
| 344 | if (resource->type != VME_SLAVE) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 345 | printk(KERN_ERR "Not a slave resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 346 | return -EINVAL; |
| 347 | } |
| 348 | |
| 349 | image = list_entry(resource->entry, struct vme_slave_resource, list); |
| 350 | |
Emilio G. Cota | 51a569f | 2009-08-10 16:52:42 +0200 | [diff] [blame] | 351 | if (bridge->slave_get == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 352 | printk(KERN_ERR "vme_slave_get not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 353 | return -EINVAL; |
| 354 | } |
| 355 | |
| 356 | return bridge->slave_get(image, enabled, vme_base, size, buf_base, |
| 357 | aspace, cycle); |
| 358 | } |
| 359 | EXPORT_SYMBOL(vme_slave_get); |
| 360 | |
| 361 | void vme_slave_free(struct vme_resource *resource) |
| 362 | { |
| 363 | struct vme_slave_resource *slave_image; |
| 364 | |
| 365 | if (resource->type != VME_SLAVE) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 366 | printk(KERN_ERR "Not a slave resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 367 | return; |
| 368 | } |
| 369 | |
| 370 | slave_image = list_entry(resource->entry, struct vme_slave_resource, |
| 371 | list); |
| 372 | if (slave_image == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 373 | printk(KERN_ERR "Can't find slave resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 374 | return; |
| 375 | } |
| 376 | |
| 377 | /* Unlock image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 378 | mutex_lock(&slave_image->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 379 | if (slave_image->locked == 0) |
| 380 | printk(KERN_ERR "Image is already free\n"); |
| 381 | |
| 382 | slave_image->locked = 0; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 383 | mutex_unlock(&slave_image->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 384 | |
| 385 | /* Free up resource memory */ |
| 386 | kfree(resource); |
| 387 | } |
| 388 | EXPORT_SYMBOL(vme_slave_free); |
| 389 | |
| 390 | /* |
| 391 | * Request a master image with specific attributes, return some unique |
| 392 | * identifier. |
| 393 | */ |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 394 | struct vme_resource *vme_master_request(struct device *dev, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 395 | vme_address_t address, vme_cycle_t cycle, vme_width_t dwidth) |
| 396 | { |
| 397 | struct vme_bridge *bridge; |
| 398 | struct list_head *master_pos = NULL; |
| 399 | struct vme_master_resource *allocated_image = NULL; |
| 400 | struct vme_master_resource *master_image = NULL; |
| 401 | struct vme_resource *resource = NULL; |
| 402 | |
| 403 | bridge = dev_to_bridge(dev); |
| 404 | if (bridge == NULL) { |
| 405 | printk(KERN_ERR "Can't find VME bus\n"); |
| 406 | goto err_bus; |
| 407 | } |
| 408 | |
| 409 | /* Loop through master resources */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 410 | list_for_each(master_pos, &bridge->master_resources) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 411 | master_image = list_entry(master_pos, |
| 412 | struct vme_master_resource, list); |
| 413 | |
| 414 | if (master_image == NULL) { |
| 415 | printk(KERN_WARNING "Registered NULL master resource\n"); |
| 416 | continue; |
| 417 | } |
| 418 | |
| 419 | /* Find an unlocked and compatible image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 420 | spin_lock(&master_image->lock); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 421 | if (((master_image->address_attr & address) == address) && |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 422 | ((master_image->cycle_attr & cycle) == cycle) && |
| 423 | ((master_image->width_attr & dwidth) == dwidth) && |
| 424 | (master_image->locked == 0)) { |
| 425 | |
| 426 | master_image->locked = 1; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 427 | spin_unlock(&master_image->lock); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 428 | allocated_image = master_image; |
| 429 | break; |
| 430 | } |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 431 | spin_unlock(&master_image->lock); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | /* Check to see if we found a resource */ |
| 435 | if (allocated_image == NULL) { |
| 436 | printk(KERN_ERR "Can't find a suitable resource\n"); |
| 437 | goto err_image; |
| 438 | } |
| 439 | |
| 440 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 441 | if (resource == NULL) { |
| 442 | printk(KERN_ERR "Unable to allocate resource structure\n"); |
| 443 | goto err_alloc; |
| 444 | } |
| 445 | resource->type = VME_MASTER; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 446 | resource->entry = &allocated_image->list; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 447 | |
| 448 | return resource; |
| 449 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 450 | err_alloc: |
| 451 | /* Unlock image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 452 | spin_lock(&master_image->lock); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 453 | master_image->locked = 0; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 454 | spin_unlock(&master_image->lock); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 455 | err_image: |
| 456 | err_bus: |
| 457 | return NULL; |
| 458 | } |
| 459 | EXPORT_SYMBOL(vme_master_request); |
| 460 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 461 | int vme_master_set(struct vme_resource *resource, int enabled, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 462 | unsigned long long vme_base, unsigned long long size, |
| 463 | vme_address_t aspace, vme_cycle_t cycle, vme_width_t dwidth) |
| 464 | { |
| 465 | struct vme_bridge *bridge = find_bridge(resource); |
| 466 | struct vme_master_resource *image; |
| 467 | int retval; |
| 468 | |
| 469 | if (resource->type != VME_MASTER) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 470 | printk(KERN_ERR "Not a master resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 471 | return -EINVAL; |
| 472 | } |
| 473 | |
| 474 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 475 | |
| 476 | if (bridge->master_set == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 477 | printk(KERN_WARNING "vme_master_set not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 478 | return -EINVAL; |
| 479 | } |
| 480 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 481 | if (!(((image->address_attr & aspace) == aspace) && |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 482 | ((image->cycle_attr & cycle) == cycle) && |
| 483 | ((image->width_attr & dwidth) == dwidth))) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 484 | printk(KERN_WARNING "Invalid attributes\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 485 | return -EINVAL; |
| 486 | } |
| 487 | |
| 488 | retval = vme_check_window(aspace, vme_base, size); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 489 | if (retval) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 490 | return retval; |
| 491 | |
| 492 | return bridge->master_set(image, enabled, vme_base, size, aspace, |
| 493 | cycle, dwidth); |
| 494 | } |
| 495 | EXPORT_SYMBOL(vme_master_set); |
| 496 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 497 | int vme_master_get(struct vme_resource *resource, int *enabled, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 498 | unsigned long long *vme_base, unsigned long long *size, |
| 499 | vme_address_t *aspace, vme_cycle_t *cycle, vme_width_t *dwidth) |
| 500 | { |
| 501 | struct vme_bridge *bridge = find_bridge(resource); |
| 502 | struct vme_master_resource *image; |
| 503 | |
| 504 | if (resource->type != VME_MASTER) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 505 | printk(KERN_ERR "Not a master resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 506 | return -EINVAL; |
| 507 | } |
| 508 | |
| 509 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 510 | |
Emilio G. Cota | 51a569f | 2009-08-10 16:52:42 +0200 | [diff] [blame] | 511 | if (bridge->master_get == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 512 | printk(KERN_WARNING "vme_master_set not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 513 | return -EINVAL; |
| 514 | } |
| 515 | |
| 516 | return bridge->master_get(image, enabled, vme_base, size, aspace, |
| 517 | cycle, dwidth); |
| 518 | } |
| 519 | EXPORT_SYMBOL(vme_master_get); |
| 520 | |
| 521 | /* |
| 522 | * Read data out of VME space into a buffer. |
| 523 | */ |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 524 | ssize_t vme_master_read(struct vme_resource *resource, void *buf, size_t count, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 525 | loff_t offset) |
| 526 | { |
| 527 | struct vme_bridge *bridge = find_bridge(resource); |
| 528 | struct vme_master_resource *image; |
| 529 | size_t length; |
| 530 | |
| 531 | if (bridge->master_read == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 532 | printk(KERN_WARNING "Reading from resource not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 533 | return -EINVAL; |
| 534 | } |
| 535 | |
| 536 | if (resource->type != VME_MASTER) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 537 | printk(KERN_ERR "Not a master resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 538 | return -EINVAL; |
| 539 | } |
| 540 | |
| 541 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 542 | |
| 543 | length = vme_get_size(resource); |
| 544 | |
| 545 | if (offset > length) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 546 | printk(KERN_WARNING "Invalid Offset\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 547 | return -EFAULT; |
| 548 | } |
| 549 | |
| 550 | if ((offset + count) > length) |
| 551 | count = length - offset; |
| 552 | |
| 553 | return bridge->master_read(image, buf, count, offset); |
| 554 | |
| 555 | } |
| 556 | EXPORT_SYMBOL(vme_master_read); |
| 557 | |
| 558 | /* |
| 559 | * Write data out to VME space from a buffer. |
| 560 | */ |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 561 | ssize_t vme_master_write(struct vme_resource *resource, void *buf, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 562 | size_t count, loff_t offset) |
| 563 | { |
| 564 | struct vme_bridge *bridge = find_bridge(resource); |
| 565 | struct vme_master_resource *image; |
| 566 | size_t length; |
| 567 | |
| 568 | if (bridge->master_write == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 569 | printk(KERN_WARNING "Writing to resource not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 570 | return -EINVAL; |
| 571 | } |
| 572 | |
| 573 | if (resource->type != VME_MASTER) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 574 | printk(KERN_ERR "Not a master resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 575 | return -EINVAL; |
| 576 | } |
| 577 | |
| 578 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 579 | |
| 580 | length = vme_get_size(resource); |
| 581 | |
| 582 | if (offset > length) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 583 | printk(KERN_WARNING "Invalid Offset\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 584 | return -EFAULT; |
| 585 | } |
| 586 | |
| 587 | if ((offset + count) > length) |
| 588 | count = length - offset; |
| 589 | |
| 590 | return bridge->master_write(image, buf, count, offset); |
| 591 | } |
| 592 | EXPORT_SYMBOL(vme_master_write); |
| 593 | |
| 594 | /* |
| 595 | * Perform RMW cycle to provided location. |
| 596 | */ |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 597 | unsigned int vme_master_rmw(struct vme_resource *resource, unsigned int mask, |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 598 | unsigned int compare, unsigned int swap, loff_t offset) |
| 599 | { |
| 600 | struct vme_bridge *bridge = find_bridge(resource); |
| 601 | struct vme_master_resource *image; |
| 602 | |
| 603 | if (bridge->master_rmw == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 604 | printk(KERN_WARNING "Writing to resource not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 605 | return -EINVAL; |
| 606 | } |
| 607 | |
| 608 | if (resource->type != VME_MASTER) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 609 | printk(KERN_ERR "Not a master resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 610 | return -EINVAL; |
| 611 | } |
| 612 | |
| 613 | image = list_entry(resource->entry, struct vme_master_resource, list); |
| 614 | |
| 615 | return bridge->master_rmw(image, mask, compare, swap, offset); |
| 616 | } |
| 617 | EXPORT_SYMBOL(vme_master_rmw); |
| 618 | |
| 619 | void vme_master_free(struct vme_resource *resource) |
| 620 | { |
| 621 | struct vme_master_resource *master_image; |
| 622 | |
| 623 | if (resource->type != VME_MASTER) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 624 | printk(KERN_ERR "Not a master resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 625 | return; |
| 626 | } |
| 627 | |
| 628 | master_image = list_entry(resource->entry, struct vme_master_resource, |
| 629 | list); |
| 630 | if (master_image == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 631 | printk(KERN_ERR "Can't find master resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 632 | return; |
| 633 | } |
| 634 | |
| 635 | /* Unlock image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 636 | spin_lock(&master_image->lock); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 637 | if (master_image->locked == 0) |
| 638 | printk(KERN_ERR "Image is already free\n"); |
| 639 | |
| 640 | master_image->locked = 0; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 641 | spin_unlock(&master_image->lock); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 642 | |
| 643 | /* Free up resource memory */ |
| 644 | kfree(resource); |
| 645 | } |
| 646 | EXPORT_SYMBOL(vme_master_free); |
| 647 | |
| 648 | /* |
| 649 | * Request a DMA controller with specific attributes, return some unique |
| 650 | * identifier. |
| 651 | */ |
Martyn Welch | 4f723df | 2010-02-18 15:12:58 +0000 | [diff] [blame] | 652 | struct vme_resource *vme_dma_request(struct device *dev, vme_dma_route_t route) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 653 | { |
| 654 | struct vme_bridge *bridge; |
| 655 | struct list_head *dma_pos = NULL; |
| 656 | struct vme_dma_resource *allocated_ctrlr = NULL; |
| 657 | struct vme_dma_resource *dma_ctrlr = NULL; |
| 658 | struct vme_resource *resource = NULL; |
| 659 | |
| 660 | /* XXX Not checking resource attributes */ |
| 661 | printk(KERN_ERR "No VME resource Attribute tests done\n"); |
| 662 | |
| 663 | bridge = dev_to_bridge(dev); |
| 664 | if (bridge == NULL) { |
| 665 | printk(KERN_ERR "Can't find VME bus\n"); |
| 666 | goto err_bus; |
| 667 | } |
| 668 | |
| 669 | /* Loop through DMA resources */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 670 | list_for_each(dma_pos, &bridge->dma_resources) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 671 | dma_ctrlr = list_entry(dma_pos, |
| 672 | struct vme_dma_resource, list); |
| 673 | |
| 674 | if (dma_ctrlr == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 675 | printk(KERN_ERR "Registered NULL DMA resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 676 | continue; |
| 677 | } |
| 678 | |
Martyn Welch | 4f723df | 2010-02-18 15:12:58 +0000 | [diff] [blame] | 679 | /* Find an unlocked and compatible controller */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 680 | mutex_lock(&dma_ctrlr->mtx); |
Martyn Welch | 4f723df | 2010-02-18 15:12:58 +0000 | [diff] [blame] | 681 | if (((dma_ctrlr->route_attr & route) == route) && |
| 682 | (dma_ctrlr->locked == 0)) { |
| 683 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 684 | dma_ctrlr->locked = 1; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 685 | mutex_unlock(&dma_ctrlr->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 686 | allocated_ctrlr = dma_ctrlr; |
| 687 | break; |
| 688 | } |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 689 | mutex_unlock(&dma_ctrlr->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | /* Check to see if we found a resource */ |
| 693 | if (allocated_ctrlr == NULL) |
| 694 | goto err_ctrlr; |
| 695 | |
| 696 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 697 | if (resource == NULL) { |
| 698 | printk(KERN_WARNING "Unable to allocate resource structure\n"); |
| 699 | goto err_alloc; |
| 700 | } |
| 701 | resource->type = VME_DMA; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 702 | resource->entry = &allocated_ctrlr->list; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 703 | |
| 704 | return resource; |
| 705 | |
| 706 | err_alloc: |
| 707 | /* Unlock image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 708 | mutex_lock(&dma_ctrlr->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 709 | dma_ctrlr->locked = 0; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 710 | mutex_unlock(&dma_ctrlr->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 711 | err_ctrlr: |
| 712 | err_bus: |
| 713 | return NULL; |
| 714 | } |
Martyn Welch | 58e5079 | 2009-10-29 16:35:20 +0000 | [diff] [blame] | 715 | EXPORT_SYMBOL(vme_dma_request); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 716 | |
| 717 | /* |
| 718 | * Start new list |
| 719 | */ |
| 720 | struct vme_dma_list *vme_new_dma_list(struct vme_resource *resource) |
| 721 | { |
| 722 | struct vme_dma_resource *ctrlr; |
| 723 | struct vme_dma_list *dma_list; |
| 724 | |
| 725 | if (resource->type != VME_DMA) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 726 | printk(KERN_ERR "Not a DMA resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 727 | return NULL; |
| 728 | } |
| 729 | |
| 730 | ctrlr = list_entry(resource->entry, struct vme_dma_resource, list); |
| 731 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 732 | dma_list = kmalloc(sizeof(struct vme_dma_list), GFP_KERNEL); |
| 733 | if (dma_list == NULL) { |
| 734 | printk(KERN_ERR "Unable to allocate memory for new dma list\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 735 | return NULL; |
| 736 | } |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 737 | INIT_LIST_HEAD(&dma_list->entries); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 738 | dma_list->parent = ctrlr; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 739 | mutex_init(&dma_list->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 740 | |
| 741 | return dma_list; |
| 742 | } |
| 743 | EXPORT_SYMBOL(vme_new_dma_list); |
| 744 | |
| 745 | /* |
| 746 | * Create "Pattern" type attributes |
| 747 | */ |
| 748 | struct vme_dma_attr *vme_dma_pattern_attribute(u32 pattern, |
| 749 | vme_pattern_t type) |
| 750 | { |
| 751 | struct vme_dma_attr *attributes; |
| 752 | struct vme_dma_pattern *pattern_attr; |
| 753 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 754 | attributes = kmalloc(sizeof(struct vme_dma_attr), GFP_KERNEL); |
| 755 | if (attributes == NULL) { |
| 756 | printk(KERN_ERR "Unable to allocate memory for attributes " |
| 757 | "structure\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 758 | goto err_attr; |
| 759 | } |
| 760 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 761 | pattern_attr = kmalloc(sizeof(struct vme_dma_pattern), GFP_KERNEL); |
| 762 | if (pattern_attr == NULL) { |
| 763 | printk(KERN_ERR "Unable to allocate memory for pattern " |
| 764 | "attributes\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 765 | goto err_pat; |
| 766 | } |
| 767 | |
| 768 | attributes->type = VME_DMA_PATTERN; |
| 769 | attributes->private = (void *)pattern_attr; |
| 770 | |
| 771 | pattern_attr->pattern = pattern; |
| 772 | pattern_attr->type = type; |
| 773 | |
| 774 | return attributes; |
| 775 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 776 | err_pat: |
| 777 | kfree(attributes); |
| 778 | err_attr: |
| 779 | return NULL; |
| 780 | } |
| 781 | EXPORT_SYMBOL(vme_dma_pattern_attribute); |
| 782 | |
| 783 | /* |
| 784 | * Create "PCI" type attributes |
| 785 | */ |
| 786 | struct vme_dma_attr *vme_dma_pci_attribute(dma_addr_t address) |
| 787 | { |
| 788 | struct vme_dma_attr *attributes; |
| 789 | struct vme_dma_pci *pci_attr; |
| 790 | |
| 791 | /* XXX Run some sanity checks here */ |
| 792 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 793 | attributes = kmalloc(sizeof(struct vme_dma_attr), GFP_KERNEL); |
| 794 | if (attributes == NULL) { |
| 795 | printk(KERN_ERR "Unable to allocate memory for attributes " |
| 796 | "structure\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 797 | goto err_attr; |
| 798 | } |
| 799 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 800 | pci_attr = kmalloc(sizeof(struct vme_dma_pci), GFP_KERNEL); |
| 801 | if (pci_attr == NULL) { |
| 802 | printk(KERN_ERR "Unable to allocate memory for pci " |
| 803 | "attributes\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 804 | goto err_pci; |
| 805 | } |
| 806 | |
| 807 | |
| 808 | |
| 809 | attributes->type = VME_DMA_PCI; |
| 810 | attributes->private = (void *)pci_attr; |
| 811 | |
| 812 | pci_attr->address = address; |
| 813 | |
| 814 | return attributes; |
| 815 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 816 | err_pci: |
| 817 | kfree(attributes); |
| 818 | err_attr: |
| 819 | return NULL; |
| 820 | } |
| 821 | EXPORT_SYMBOL(vme_dma_pci_attribute); |
| 822 | |
| 823 | /* |
| 824 | * Create "VME" type attributes |
| 825 | */ |
| 826 | struct vme_dma_attr *vme_dma_vme_attribute(unsigned long long address, |
| 827 | vme_address_t aspace, vme_cycle_t cycle, vme_width_t dwidth) |
| 828 | { |
| 829 | struct vme_dma_attr *attributes; |
| 830 | struct vme_dma_vme *vme_attr; |
| 831 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 832 | attributes = kmalloc( |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 833 | sizeof(struct vme_dma_attr), GFP_KERNEL); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 834 | if (attributes == NULL) { |
| 835 | printk(KERN_ERR "Unable to allocate memory for attributes " |
| 836 | "structure\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 837 | goto err_attr; |
| 838 | } |
| 839 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 840 | vme_attr = kmalloc(sizeof(struct vme_dma_vme), GFP_KERNEL); |
| 841 | if (vme_attr == NULL) { |
| 842 | printk(KERN_ERR "Unable to allocate memory for vme " |
| 843 | "attributes\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 844 | goto err_vme; |
| 845 | } |
| 846 | |
| 847 | attributes->type = VME_DMA_VME; |
| 848 | attributes->private = (void *)vme_attr; |
| 849 | |
| 850 | vme_attr->address = address; |
| 851 | vme_attr->aspace = aspace; |
| 852 | vme_attr->cycle = cycle; |
| 853 | vme_attr->dwidth = dwidth; |
| 854 | |
| 855 | return attributes; |
| 856 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 857 | err_vme: |
| 858 | kfree(attributes); |
| 859 | err_attr: |
| 860 | return NULL; |
| 861 | } |
| 862 | EXPORT_SYMBOL(vme_dma_vme_attribute); |
| 863 | |
| 864 | /* |
| 865 | * Free attribute |
| 866 | */ |
| 867 | void vme_dma_free_attribute(struct vme_dma_attr *attributes) |
| 868 | { |
| 869 | kfree(attributes->private); |
| 870 | kfree(attributes); |
| 871 | } |
| 872 | EXPORT_SYMBOL(vme_dma_free_attribute); |
| 873 | |
| 874 | int vme_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src, |
| 875 | struct vme_dma_attr *dest, size_t count) |
| 876 | { |
| 877 | struct vme_bridge *bridge = list->parent->parent; |
| 878 | int retval; |
| 879 | |
| 880 | if (bridge->dma_list_add == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 881 | printk(KERN_WARNING "Link List DMA generation not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 882 | return -EINVAL; |
| 883 | } |
| 884 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 885 | if (!mutex_trylock(&list->mtx)) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 886 | printk(KERN_ERR "Link List already submitted\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 887 | return -EINVAL; |
| 888 | } |
| 889 | |
| 890 | retval = bridge->dma_list_add(list, src, dest, count); |
| 891 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 892 | mutex_unlock(&list->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 893 | |
| 894 | return retval; |
| 895 | } |
| 896 | EXPORT_SYMBOL(vme_dma_list_add); |
| 897 | |
| 898 | int vme_dma_list_exec(struct vme_dma_list *list) |
| 899 | { |
| 900 | struct vme_bridge *bridge = list->parent->parent; |
| 901 | int retval; |
| 902 | |
| 903 | if (bridge->dma_list_exec == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 904 | printk(KERN_ERR "Link List DMA execution not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 905 | return -EINVAL; |
| 906 | } |
| 907 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 908 | mutex_lock(&list->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 909 | |
| 910 | retval = bridge->dma_list_exec(list); |
| 911 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 912 | mutex_unlock(&list->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 913 | |
| 914 | return retval; |
| 915 | } |
| 916 | EXPORT_SYMBOL(vme_dma_list_exec); |
| 917 | |
| 918 | int vme_dma_list_free(struct vme_dma_list *list) |
| 919 | { |
| 920 | struct vme_bridge *bridge = list->parent->parent; |
| 921 | int retval; |
| 922 | |
| 923 | if (bridge->dma_list_empty == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 924 | printk(KERN_WARNING "Emptying of Link Lists not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 925 | return -EINVAL; |
| 926 | } |
| 927 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 928 | if (!mutex_trylock(&list->mtx)) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 929 | printk(KERN_ERR "Link List in use\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 930 | return -EINVAL; |
| 931 | } |
| 932 | |
| 933 | /* |
| 934 | * Empty out all of the entries from the dma list. We need to go to the |
| 935 | * low level driver as dma entries are driver specific. |
| 936 | */ |
| 937 | retval = bridge->dma_list_empty(list); |
| 938 | if (retval) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 939 | printk(KERN_ERR "Unable to empty link-list entries\n"); |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 940 | mutex_unlock(&list->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 941 | return retval; |
| 942 | } |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 943 | mutex_unlock(&list->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 944 | kfree(list); |
| 945 | |
| 946 | return retval; |
| 947 | } |
| 948 | EXPORT_SYMBOL(vme_dma_list_free); |
| 949 | |
| 950 | int vme_dma_free(struct vme_resource *resource) |
| 951 | { |
| 952 | struct vme_dma_resource *ctrlr; |
| 953 | |
| 954 | if (resource->type != VME_DMA) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 955 | printk(KERN_ERR "Not a DMA resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 956 | return -EINVAL; |
| 957 | } |
| 958 | |
| 959 | ctrlr = list_entry(resource->entry, struct vme_dma_resource, list); |
| 960 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 961 | if (!mutex_trylock(&ctrlr->mtx)) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 962 | printk(KERN_ERR "Resource busy, can't free\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 963 | return -EBUSY; |
| 964 | } |
| 965 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 966 | if (!(list_empty(&ctrlr->pending) && list_empty(&ctrlr->running))) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 967 | printk(KERN_WARNING "Resource still processing transfers\n"); |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 968 | mutex_unlock(&ctrlr->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 969 | return -EBUSY; |
| 970 | } |
| 971 | |
| 972 | ctrlr->locked = 0; |
| 973 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 974 | mutex_unlock(&ctrlr->mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 975 | |
| 976 | return 0; |
| 977 | } |
| 978 | EXPORT_SYMBOL(vme_dma_free); |
| 979 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 980 | void vme_irq_handler(struct vme_bridge *bridge, int level, int statid) |
| 981 | { |
| 982 | void (*call)(int, int, void *); |
| 983 | void *priv_data; |
| 984 | |
| 985 | call = bridge->irq[level - 1].callback[statid].func; |
| 986 | priv_data = bridge->irq[level - 1].callback[statid].priv_data; |
| 987 | |
| 988 | if (call != NULL) |
| 989 | call(level, statid, priv_data); |
| 990 | else |
| 991 | printk(KERN_WARNING "Spurilous VME interrupt, level:%x, " |
| 992 | "vector:%x\n", level, statid); |
| 993 | } |
| 994 | EXPORT_SYMBOL(vme_irq_handler); |
| 995 | |
| 996 | int vme_irq_request(struct device *dev, int level, int statid, |
Martyn Welch | 29848ac | 2010-02-18 15:13:05 +0000 | [diff] [blame] | 997 | void (*callback)(int, int, void *), |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 998 | void *priv_data) |
| 999 | { |
| 1000 | struct vme_bridge *bridge; |
| 1001 | |
| 1002 | bridge = dev_to_bridge(dev); |
| 1003 | if (bridge == NULL) { |
| 1004 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1005 | return -EINVAL; |
| 1006 | } |
| 1007 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1008 | if ((level < 1) || (level > 7)) { |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1009 | printk(KERN_ERR "Invalid interrupt level\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1010 | return -EINVAL; |
| 1011 | } |
| 1012 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1013 | if (bridge->irq_set == NULL) { |
| 1014 | printk(KERN_ERR "Configuring interrupts not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1015 | return -EINVAL; |
| 1016 | } |
| 1017 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1018 | mutex_lock(&bridge->irq_mtx); |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1019 | |
| 1020 | if (bridge->irq[level - 1].callback[statid].func) { |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1021 | mutex_unlock(&bridge->irq_mtx); |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1022 | printk(KERN_WARNING "VME Interrupt already taken\n"); |
| 1023 | return -EBUSY; |
| 1024 | } |
| 1025 | |
| 1026 | bridge->irq[level - 1].count++; |
| 1027 | bridge->irq[level - 1].callback[statid].priv_data = priv_data; |
| 1028 | bridge->irq[level - 1].callback[statid].func = callback; |
| 1029 | |
| 1030 | /* Enable IRQ level */ |
Martyn Welch | 29848ac | 2010-02-18 15:13:05 +0000 | [diff] [blame] | 1031 | bridge->irq_set(bridge, level, 1, 1); |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1032 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1033 | mutex_unlock(&bridge->irq_mtx); |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1034 | |
| 1035 | return 0; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1036 | } |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1037 | EXPORT_SYMBOL(vme_irq_request); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1038 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1039 | void vme_irq_free(struct device *dev, int level, int statid) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1040 | { |
| 1041 | struct vme_bridge *bridge; |
| 1042 | |
| 1043 | bridge = dev_to_bridge(dev); |
| 1044 | if (bridge == NULL) { |
| 1045 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1046 | return; |
| 1047 | } |
| 1048 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1049 | if ((level < 1) || (level > 7)) { |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1050 | printk(KERN_ERR "Invalid interrupt level\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1051 | return; |
| 1052 | } |
| 1053 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1054 | if (bridge->irq_set == NULL) { |
| 1055 | printk(KERN_ERR "Configuring interrupts not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1056 | return; |
| 1057 | } |
| 1058 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1059 | mutex_lock(&bridge->irq_mtx); |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1060 | |
| 1061 | bridge->irq[level - 1].count--; |
| 1062 | |
| 1063 | /* Disable IRQ level if no more interrupts attached at this level*/ |
| 1064 | if (bridge->irq[level - 1].count == 0) |
Martyn Welch | 29848ac | 2010-02-18 15:13:05 +0000 | [diff] [blame] | 1065 | bridge->irq_set(bridge, level, 0, 1); |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1066 | |
| 1067 | bridge->irq[level - 1].callback[statid].func = NULL; |
| 1068 | bridge->irq[level - 1].callback[statid].priv_data = NULL; |
| 1069 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1070 | mutex_unlock(&bridge->irq_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1071 | } |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1072 | EXPORT_SYMBOL(vme_irq_free); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1073 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1074 | int vme_irq_generate(struct device *dev, int level, int statid) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1075 | { |
| 1076 | struct vme_bridge *bridge; |
| 1077 | |
| 1078 | bridge = dev_to_bridge(dev); |
| 1079 | if (bridge == NULL) { |
| 1080 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1081 | return -EINVAL; |
| 1082 | } |
| 1083 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1084 | if ((level < 1) || (level > 7)) { |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1085 | printk(KERN_WARNING "Invalid interrupt level\n"); |
| 1086 | return -EINVAL; |
| 1087 | } |
| 1088 | |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1089 | if (bridge->irq_generate == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1090 | printk(KERN_WARNING "Interrupt generation not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1091 | return -EINVAL; |
| 1092 | } |
| 1093 | |
Martyn Welch | 29848ac | 2010-02-18 15:13:05 +0000 | [diff] [blame] | 1094 | return bridge->irq_generate(bridge, level, statid); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1095 | } |
Martyn Welch | c813f59 | 2009-10-29 16:34:54 +0000 | [diff] [blame] | 1096 | EXPORT_SYMBOL(vme_irq_generate); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1097 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1098 | /* |
| 1099 | * Request the location monitor, return resource or NULL |
| 1100 | */ |
| 1101 | struct vme_resource *vme_lm_request(struct device *dev) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1102 | { |
| 1103 | struct vme_bridge *bridge; |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1104 | struct list_head *lm_pos = NULL; |
| 1105 | struct vme_lm_resource *allocated_lm = NULL; |
| 1106 | struct vme_lm_resource *lm = NULL; |
| 1107 | struct vme_resource *resource = NULL; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1108 | |
| 1109 | bridge = dev_to_bridge(dev); |
| 1110 | if (bridge == NULL) { |
| 1111 | printk(KERN_ERR "Can't find VME bus\n"); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1112 | goto err_bus; |
| 1113 | } |
| 1114 | |
| 1115 | /* Loop through DMA resources */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1116 | list_for_each(lm_pos, &bridge->lm_resources) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1117 | lm = list_entry(lm_pos, |
| 1118 | struct vme_lm_resource, list); |
| 1119 | |
| 1120 | if (lm == NULL) { |
| 1121 | printk(KERN_ERR "Registered NULL Location Monitor " |
| 1122 | "resource\n"); |
| 1123 | continue; |
| 1124 | } |
| 1125 | |
| 1126 | /* Find an unlocked controller */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1127 | mutex_lock(&lm->mtx); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1128 | if (lm->locked == 0) { |
| 1129 | lm->locked = 1; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1130 | mutex_unlock(&lm->mtx); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1131 | allocated_lm = lm; |
| 1132 | break; |
| 1133 | } |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1134 | mutex_unlock(&lm->mtx); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1135 | } |
| 1136 | |
| 1137 | /* Check to see if we found a resource */ |
| 1138 | if (allocated_lm == NULL) |
| 1139 | goto err_lm; |
| 1140 | |
| 1141 | resource = kmalloc(sizeof(struct vme_resource), GFP_KERNEL); |
| 1142 | if (resource == NULL) { |
| 1143 | printk(KERN_ERR "Unable to allocate resource structure\n"); |
| 1144 | goto err_alloc; |
| 1145 | } |
| 1146 | resource->type = VME_LM; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1147 | resource->entry = &allocated_lm->list; |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1148 | |
| 1149 | return resource; |
| 1150 | |
| 1151 | err_alloc: |
| 1152 | /* Unlock image */ |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1153 | mutex_lock(&lm->mtx); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1154 | lm->locked = 0; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1155 | mutex_unlock(&lm->mtx); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1156 | err_lm: |
| 1157 | err_bus: |
| 1158 | return NULL; |
| 1159 | } |
| 1160 | EXPORT_SYMBOL(vme_lm_request); |
| 1161 | |
| 1162 | int vme_lm_count(struct vme_resource *resource) |
| 1163 | { |
| 1164 | struct vme_lm_resource *lm; |
| 1165 | |
| 1166 | if (resource->type != VME_LM) { |
| 1167 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1168 | return -EINVAL; |
| 1169 | } |
| 1170 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1171 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1172 | |
| 1173 | return lm->monitors; |
| 1174 | } |
| 1175 | EXPORT_SYMBOL(vme_lm_count); |
| 1176 | |
| 1177 | int vme_lm_set(struct vme_resource *resource, unsigned long long lm_base, |
| 1178 | vme_address_t aspace, vme_cycle_t cycle) |
| 1179 | { |
| 1180 | struct vme_bridge *bridge = find_bridge(resource); |
| 1181 | struct vme_lm_resource *lm; |
| 1182 | |
| 1183 | if (resource->type != VME_LM) { |
| 1184 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
| 1185 | return -EINVAL; |
| 1186 | } |
| 1187 | |
| 1188 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1189 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1190 | if (bridge->lm_set == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1191 | printk(KERN_ERR "vme_lm_set not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1192 | return -EINVAL; |
| 1193 | } |
| 1194 | |
Martyn Welch | 8be9226 | 2009-10-29 16:35:08 +0000 | [diff] [blame] | 1195 | return bridge->lm_set(lm, lm_base, aspace, cycle); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1196 | } |
| 1197 | EXPORT_SYMBOL(vme_lm_set); |
| 1198 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1199 | int vme_lm_get(struct vme_resource *resource, unsigned long long *lm_base, |
| 1200 | vme_address_t *aspace, vme_cycle_t *cycle) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1201 | { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1202 | struct vme_bridge *bridge = find_bridge(resource); |
| 1203 | struct vme_lm_resource *lm; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1204 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1205 | if (resource->type != VME_LM) { |
| 1206 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1207 | return -EINVAL; |
| 1208 | } |
| 1209 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1210 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1211 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1212 | if (bridge->lm_get == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1213 | printk(KERN_ERR "vme_lm_get not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1214 | return -EINVAL; |
| 1215 | } |
| 1216 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1217 | return bridge->lm_get(lm, lm_base, aspace, cycle); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1218 | } |
| 1219 | EXPORT_SYMBOL(vme_lm_get); |
| 1220 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1221 | int vme_lm_attach(struct vme_resource *resource, int monitor, |
| 1222 | void (*callback)(int)) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1223 | { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1224 | struct vme_bridge *bridge = find_bridge(resource); |
| 1225 | struct vme_lm_resource *lm; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1226 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1227 | if (resource->type != VME_LM) { |
| 1228 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1229 | return -EINVAL; |
| 1230 | } |
| 1231 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1232 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1233 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1234 | if (bridge->lm_attach == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1235 | printk(KERN_ERR "vme_lm_attach not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1236 | return -EINVAL; |
| 1237 | } |
| 1238 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1239 | return bridge->lm_attach(lm, monitor, callback); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1240 | } |
| 1241 | EXPORT_SYMBOL(vme_lm_attach); |
| 1242 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1243 | int vme_lm_detach(struct vme_resource *resource, int monitor) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1244 | { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1245 | struct vme_bridge *bridge = find_bridge(resource); |
| 1246 | struct vme_lm_resource *lm; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1247 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1248 | if (resource->type != VME_LM) { |
| 1249 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1250 | return -EINVAL; |
| 1251 | } |
| 1252 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1253 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1254 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1255 | if (bridge->lm_detach == NULL) { |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1256 | printk(KERN_ERR "vme_lm_detach not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1257 | return -EINVAL; |
| 1258 | } |
| 1259 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1260 | return bridge->lm_detach(lm, monitor); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1261 | } |
| 1262 | EXPORT_SYMBOL(vme_lm_detach); |
| 1263 | |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1264 | void vme_lm_free(struct vme_resource *resource) |
| 1265 | { |
| 1266 | struct vme_lm_resource *lm; |
| 1267 | |
| 1268 | if (resource->type != VME_LM) { |
| 1269 | printk(KERN_ERR "Not a Location Monitor resource\n"); |
| 1270 | return; |
| 1271 | } |
| 1272 | |
| 1273 | lm = list_entry(resource->entry, struct vme_lm_resource, list); |
| 1274 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1275 | mutex_lock(&lm->mtx); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1276 | |
Martyn Welch | 8be9226 | 2009-10-29 16:35:08 +0000 | [diff] [blame] | 1277 | /* XXX |
| 1278 | * Check to see that there aren't any callbacks still attached, if |
| 1279 | * there are we should probably be detaching them! |
| 1280 | */ |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1281 | |
| 1282 | lm->locked = 0; |
| 1283 | |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1284 | mutex_unlock(&lm->mtx); |
Martyn Welch | 8be9226 | 2009-10-29 16:35:08 +0000 | [diff] [blame] | 1285 | |
| 1286 | kfree(resource); |
Martyn Welch | 42fb503 | 2009-08-11 17:44:56 +0100 | [diff] [blame] | 1287 | } |
| 1288 | EXPORT_SYMBOL(vme_lm_free); |
| 1289 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1290 | int vme_slot_get(struct device *bus) |
| 1291 | { |
| 1292 | struct vme_bridge *bridge; |
| 1293 | |
| 1294 | bridge = dev_to_bridge(bus); |
| 1295 | if (bridge == NULL) { |
| 1296 | printk(KERN_ERR "Can't find VME bus\n"); |
| 1297 | return -EINVAL; |
| 1298 | } |
| 1299 | |
| 1300 | if (bridge->slot_get == NULL) { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1301 | printk(KERN_WARNING "vme_slot_get not supported\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1302 | return -EINVAL; |
| 1303 | } |
| 1304 | |
Martyn Welch | 29848ac | 2010-02-18 15:13:05 +0000 | [diff] [blame] | 1305 | return bridge->slot_get(bridge); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1306 | } |
| 1307 | EXPORT_SYMBOL(vme_slot_get); |
| 1308 | |
| 1309 | |
| 1310 | /* - Bridge Registration --------------------------------------------------- */ |
| 1311 | |
| 1312 | static int vme_alloc_bus_num(void) |
| 1313 | { |
| 1314 | int i; |
| 1315 | |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1316 | mutex_lock(&vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1317 | for (i = 0; i < sizeof(vme_bus_numbers) * 8; i++) { |
| 1318 | if (((vme_bus_numbers >> i) & 0x1) == 0) { |
| 1319 | vme_bus_numbers |= (0x1 << i); |
| 1320 | break; |
| 1321 | } |
| 1322 | } |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1323 | mutex_unlock(&vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1324 | |
| 1325 | return i; |
| 1326 | } |
| 1327 | |
| 1328 | static void vme_free_bus_num(int bus) |
| 1329 | { |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1330 | mutex_lock(&vme_bus_num_mtx); |
Emilio G. Cota | db6d8fc | 2010-11-12 11:14:27 +0000 | [diff] [blame] | 1331 | vme_bus_numbers &= ~(0x1 << bus); |
Martyn Welch | 400822f | 2009-08-11 16:20:22 +0100 | [diff] [blame] | 1332 | mutex_unlock(&vme_bus_num_mtx); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1333 | } |
| 1334 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1335 | int vme_register_bridge(struct vme_bridge *bridge) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1336 | { |
| 1337 | struct device *dev; |
| 1338 | int retval; |
| 1339 | int i; |
| 1340 | |
| 1341 | bridge->num = vme_alloc_bus_num(); |
| 1342 | |
| 1343 | /* This creates 32 vme "slot" devices. This equates to a slot for each |
| 1344 | * ID available in a system conforming to the ANSI/VITA 1-1994 |
| 1345 | * specification. |
| 1346 | */ |
| 1347 | for (i = 0; i < VME_SLOTS_MAX; i++) { |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1348 | dev = &bridge->dev[i]; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1349 | memset(dev, 0, sizeof(struct device)); |
| 1350 | |
| 1351 | dev->parent = bridge->parent; |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1352 | dev->bus = &vme_bus_type; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1353 | /* |
| 1354 | * We save a pointer to the bridge in platform_data so that we |
| 1355 | * can get to it later. We keep driver_data for use by the |
| 1356 | * driver that binds against the slot |
| 1357 | */ |
| 1358 | dev->platform_data = bridge; |
| 1359 | dev_set_name(dev, "vme-%x.%x", bridge->num, i + 1); |
| 1360 | |
| 1361 | retval = device_register(dev); |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1362 | if (retval) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1363 | goto err_reg; |
| 1364 | } |
| 1365 | |
| 1366 | return retval; |
| 1367 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1368 | err_reg: |
Manohar Vanga | da1bbd1 | 2011-02-23 14:25:28 +0100 | [diff] [blame] | 1369 | while (--i >= 0) { |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1370 | dev = &bridge->dev[i]; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1371 | device_unregister(dev); |
| 1372 | } |
| 1373 | vme_free_bus_num(bridge->num); |
| 1374 | return retval; |
| 1375 | } |
| 1376 | EXPORT_SYMBOL(vme_register_bridge); |
| 1377 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1378 | void vme_unregister_bridge(struct vme_bridge *bridge) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1379 | { |
| 1380 | int i; |
| 1381 | struct device *dev; |
| 1382 | |
| 1383 | |
| 1384 | for (i = 0; i < VME_SLOTS_MAX; i++) { |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1385 | dev = &bridge->dev[i]; |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1386 | device_unregister(dev); |
| 1387 | } |
| 1388 | vme_free_bus_num(bridge->num); |
| 1389 | } |
| 1390 | EXPORT_SYMBOL(vme_unregister_bridge); |
| 1391 | |
| 1392 | |
| 1393 | /* - Driver Registration --------------------------------------------------- */ |
| 1394 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1395 | int vme_register_driver(struct vme_driver *drv) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1396 | { |
| 1397 | drv->driver.name = drv->name; |
| 1398 | drv->driver.bus = &vme_bus_type; |
| 1399 | |
| 1400 | return driver_register(&drv->driver); |
| 1401 | } |
| 1402 | EXPORT_SYMBOL(vme_register_driver); |
| 1403 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1404 | void vme_unregister_driver(struct vme_driver *drv) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1405 | { |
| 1406 | driver_unregister(&drv->driver); |
| 1407 | } |
| 1408 | EXPORT_SYMBOL(vme_unregister_driver); |
| 1409 | |
| 1410 | /* - Bus Registration ------------------------------------------------------ */ |
| 1411 | |
Bill Pemberton | b1a5fad4 | 2010-04-28 16:40:11 -0400 | [diff] [blame] | 1412 | static int vme_calc_slot(struct device *dev) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1413 | { |
| 1414 | struct vme_bridge *bridge; |
| 1415 | int num; |
| 1416 | |
| 1417 | bridge = dev_to_bridge(dev); |
| 1418 | |
| 1419 | /* Determine slot number */ |
| 1420 | num = 0; |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1421 | while (num < VME_SLOTS_MAX) { |
Emilio G. Cota | 886953e | 2010-11-12 11:14:07 +0000 | [diff] [blame] | 1422 | if (&bridge->dev[num] == dev) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1423 | break; |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1424 | |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1425 | num++; |
| 1426 | } |
| 1427 | if (num == VME_SLOTS_MAX) { |
| 1428 | dev_err(dev, "Failed to identify slot\n"); |
| 1429 | num = 0; |
| 1430 | goto err_dev; |
| 1431 | } |
| 1432 | num++; |
| 1433 | |
| 1434 | err_dev: |
| 1435 | return num; |
| 1436 | } |
| 1437 | |
| 1438 | static struct vme_driver *dev_to_vme_driver(struct device *dev) |
| 1439 | { |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1440 | if (dev->driver == NULL) |
| 1441 | printk(KERN_ERR "Bugger dev->driver is NULL\n"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1442 | |
| 1443 | return container_of(dev->driver, struct vme_driver, driver); |
| 1444 | } |
| 1445 | |
| 1446 | static int vme_bus_match(struct device *dev, struct device_driver *drv) |
| 1447 | { |
| 1448 | struct vme_bridge *bridge; |
| 1449 | struct vme_driver *driver; |
| 1450 | int i, num; |
| 1451 | |
| 1452 | bridge = dev_to_bridge(dev); |
| 1453 | driver = container_of(drv, struct vme_driver, driver); |
| 1454 | |
| 1455 | num = vme_calc_slot(dev); |
| 1456 | if (!num) |
| 1457 | goto err_dev; |
| 1458 | |
| 1459 | if (driver->bind_table == NULL) { |
| 1460 | dev_err(dev, "Bind table NULL\n"); |
| 1461 | goto err_table; |
| 1462 | } |
| 1463 | |
| 1464 | i = 0; |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1465 | while ((driver->bind_table[i].bus != 0) || |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1466 | (driver->bind_table[i].slot != 0)) { |
| 1467 | |
Martyn Welch | a37b0da | 2009-08-06 09:43:07 +0100 | [diff] [blame] | 1468 | if (bridge->num == driver->bind_table[i].bus) { |
| 1469 | if (num == driver->bind_table[i].slot) |
| 1470 | return 1; |
| 1471 | |
| 1472 | if (driver->bind_table[i].slot == VME_SLOT_ALL) |
| 1473 | return 1; |
| 1474 | |
| 1475 | if ((driver->bind_table[i].slot == VME_SLOT_CURRENT) && |
| 1476 | (num == vme_slot_get(dev))) |
| 1477 | return 1; |
| 1478 | } |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1479 | i++; |
| 1480 | } |
| 1481 | |
| 1482 | err_dev: |
| 1483 | err_table: |
| 1484 | return 0; |
| 1485 | } |
| 1486 | |
| 1487 | static int vme_bus_probe(struct device *dev) |
| 1488 | { |
| 1489 | struct vme_bridge *bridge; |
| 1490 | struct vme_driver *driver; |
| 1491 | int retval = -ENODEV; |
| 1492 | |
| 1493 | driver = dev_to_vme_driver(dev); |
| 1494 | bridge = dev_to_bridge(dev); |
| 1495 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1496 | if (driver->probe != NULL) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1497 | retval = driver->probe(dev, bridge->num, vme_calc_slot(dev)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1498 | |
| 1499 | return retval; |
| 1500 | } |
| 1501 | |
| 1502 | static int vme_bus_remove(struct device *dev) |
| 1503 | { |
| 1504 | struct vme_bridge *bridge; |
| 1505 | struct vme_driver *driver; |
| 1506 | int retval = -ENODEV; |
| 1507 | |
| 1508 | driver = dev_to_vme_driver(dev); |
| 1509 | bridge = dev_to_bridge(dev); |
| 1510 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1511 | if (driver->remove != NULL) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1512 | retval = driver->remove(dev, bridge->num, vme_calc_slot(dev)); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1513 | |
| 1514 | return retval; |
| 1515 | } |
| 1516 | |
| 1517 | struct bus_type vme_bus_type = { |
| 1518 | .name = "vme", |
| 1519 | .match = vme_bus_match, |
| 1520 | .probe = vme_bus_probe, |
| 1521 | .remove = vme_bus_remove, |
| 1522 | }; |
| 1523 | EXPORT_SYMBOL(vme_bus_type); |
| 1524 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1525 | static int __init vme_init(void) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1526 | { |
| 1527 | return bus_register(&vme_bus_type); |
| 1528 | } |
| 1529 | |
Martyn Welch | ead1f3e | 2009-12-15 08:43:02 +0000 | [diff] [blame] | 1530 | static void __exit vme_exit(void) |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1531 | { |
| 1532 | bus_unregister(&vme_bus_type); |
| 1533 | } |
| 1534 | |
| 1535 | MODULE_DESCRIPTION("VME bridge driver framework"); |
Martyn Welch | 66bd8db | 2010-02-18 15:12:52 +0000 | [diff] [blame] | 1536 | MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com"); |
Martyn Welch | a17a75e | 2009-07-31 09:28:17 +0100 | [diff] [blame] | 1537 | MODULE_LICENSE("GPL"); |
| 1538 | |
| 1539 | module_init(vme_init); |
| 1540 | module_exit(vme_exit); |