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-rw-r--r--linux/agpsupport.c146
1 files changed, 63 insertions, 83 deletions
diff --git a/linux/agpsupport.c b/linux/agpsupport.c
index 24fd59cd..bc383041 100644
--- a/linux/agpsupport.c
+++ b/linux/agpsupport.c
@@ -11,11 +11,11 @@
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
- *
+ *
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
- *
+ *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
@@ -23,7 +23,7 @@
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
- *
+ *
* Author: Rickard E. (Rik) Faith <faith@valinux.com>
*
*/
@@ -31,48 +31,14 @@
#define __NO_VERSION__
#include "drmP.h"
#include <linux/module.h>
+#if LINUX_VERSION_CODE < 0x020400
+#include "agpsupport-pre24.h"
+#else
+#define DRM_AGP_GET (drm_agp_t *)inter_module_get("drm_agp")
+#define DRM_AGP_PUT inter_module_put("drm_agp")
+#endif
-drm_agp_func_t drm_agp = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
-
-/* The C standard says that 'void *' is not guaranteed to hold a function
- pointer, so we use this union to define a generic pointer that is
- guaranteed to hold any of the function pointers we care about. */
-typedef union {
- void (*free_memory)(agp_memory *);
- agp_memory *(*allocate_memory)(size_t, u32);
- int (*bind_memory)(agp_memory *, off_t);
- int (*unbind_memory)(agp_memory *);
- void (*enable)(u32);
- int (*acquire)(void);
- void (*release)(void);
- void (*copy_info)(agp_kern_info *);
- unsigned long address;
-} drm_agp_func_u;
-
-typedef struct drm_agp_fill {
- const char *name;
- drm_agp_func_u *f;
-} drm_agp_fill_t;
-
-static drm_agp_fill_t drm_agp_fill[] = {
- { __MODULE_STRING(agp_free_memory),
- (drm_agp_func_u *)&drm_agp.free_memory },
- { __MODULE_STRING(agp_allocate_memory),
- (drm_agp_func_u *)&drm_agp.allocate_memory },
- { __MODULE_STRING(agp_bind_memory),
- (drm_agp_func_u *)&drm_agp.bind_memory },
- { __MODULE_STRING(agp_unbind_memory),
- (drm_agp_func_u *)&drm_agp.unbind_memory },
- { __MODULE_STRING(agp_enable),
- (drm_agp_func_u *)&drm_agp.enable },
- { __MODULE_STRING(agp_backend_acquire),
- (drm_agp_func_u *)&drm_agp.acquire },
- { __MODULE_STRING(agp_backend_release),
- (drm_agp_func_u *)&drm_agp.release },
- { __MODULE_STRING(agp_copy_info),
- (drm_agp_func_u *)&drm_agp.copy_info },
- { NULL, NULL }
-};
+static const drm_agp_t *drm_agp = NULL;
int drm_agp_info(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
@@ -82,7 +48,7 @@ int drm_agp_info(struct inode *inode, struct file *filp, unsigned int cmd,
agp_kern_info *kern;
drm_agp_info_t info;
- if (!dev->agp->acquired || !drm_agp.copy_info) return -EINVAL;
+ if (!dev->agp->acquired || !drm_agp->copy_info) return -EINVAL;
kern = &dev->agp->agp_info;
info.agp_version_major = kern->version.major;
@@ -107,8 +73,8 @@ int drm_agp_acquire(struct inode *inode, struct file *filp, unsigned int cmd,
drm_device_t *dev = priv->dev;
int retcode;
- if (dev->agp->acquired || !drm_agp.acquire) return -EINVAL;
- if ((retcode = (*drm_agp.acquire)())) return retcode;
+ if (dev->agp->acquired || !drm_agp->acquire) return -EINVAL;
+ if ((retcode = drm_agp->acquire())) return retcode;
dev->agp->acquired = 1;
return 0;
}
@@ -119,11 +85,16 @@ int drm_agp_release(struct inode *inode, struct file *filp, unsigned int cmd,
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
- if (!dev->agp->acquired || !drm_agp.release) return -EINVAL;
- (*drm_agp.release)();
+ if (!dev->agp->acquired || !drm_agp->release) return -EINVAL;
+ drm_agp->release();
dev->agp->acquired = 0;
return 0;
-
+
+}
+
+void _drm_agp_release(void)
+{
+ if (drm_agp->release) drm_agp->release();
}
int drm_agp_enable(struct inode *inode, struct file *filp, unsigned int cmd,
@@ -133,13 +104,13 @@ int drm_agp_enable(struct inode *inode, struct file *filp, unsigned int cmd,
drm_device_t *dev = priv->dev;
drm_agp_mode_t mode;
- if (!dev->agp->acquired || !drm_agp.enable) return -EINVAL;
+ if (!dev->agp->acquired || !drm_agp->enable) return -EINVAL;
if (copy_from_user(&mode, (drm_agp_mode_t *)arg, sizeof(mode)))
return -EFAULT;
-
+
dev->agp->mode = mode.mode;
- (*drm_agp.enable)(mode.mode);
+ drm_agp->enable(mode.mode);
dev->agp->base = dev->agp->agp_info.aper_base;
dev->agp->enabled = 1;
return 0;
@@ -160,7 +131,7 @@ int drm_agp_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
return -EFAULT;
if (!(entry = drm_alloc(sizeof(*entry), DRM_MEM_AGPLISTS)))
return -ENOMEM;
-
+
memset(entry, 0, sizeof(*entry));
pages = (request.size + PAGE_SIZE - 1) / PAGE_SIZE;
@@ -170,7 +141,7 @@ int drm_agp_alloc(struct inode *inode, struct file *filp, unsigned int cmd,
drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS);
return -ENOMEM;
}
-
+
entry->handle = (unsigned long)memory->memory;
entry->memory = memory;
entry->bound = 0;
@@ -230,8 +201,8 @@ int drm_agp_bind(struct inode *inode, struct file *filp, unsigned int cmd,
drm_agp_mem_t *entry;
int retcode;
int page;
-
- if (!dev->agp->acquired || !drm_agp.bind_memory) return -EINVAL;
+
+ if (!dev->agp->acquired || !drm_agp->bind_memory) return -EINVAL;
if (copy_from_user(&request, (drm_agp_binding_t *)arg, sizeof(request)))
return -EFAULT;
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
@@ -240,7 +211,7 @@ int drm_agp_bind(struct inode *inode, struct file *filp, unsigned int cmd,
page = (request.offset + PAGE_SIZE - 1) / PAGE_SIZE;
if ((retcode = drm_bind_agp(entry->memory, page))) return retcode;
entry->bound = dev->agp->base + (page << PAGE_SHIFT);
- DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
+ DRM_DEBUG("base = 0x%lx entry->bound = 0x%lx\n",
dev->agp->base, entry->bound);
return 0;
}
@@ -252,14 +223,14 @@ int drm_agp_free(struct inode *inode, struct file *filp, unsigned int cmd,
drm_device_t *dev = priv->dev;
drm_agp_buffer_t request;
drm_agp_mem_t *entry;
-
+
if (!dev->agp->acquired) return -EINVAL;
if (copy_from_user(&request, (drm_agp_buffer_t *)arg, sizeof(request)))
return -EFAULT;
if (!(entry = drm_agp_lookup_entry(dev, request.handle)))
return -EINVAL;
if (entry->bound) drm_unbind_agp(entry->memory);
-
+
if (entry->prev) entry->prev->next = entry->next;
else dev->agp->memory = entry->next;
if (entry->next) entry->next->prev = entry->prev;
@@ -270,24 +241,14 @@ int drm_agp_free(struct inode *inode, struct file *filp, unsigned int cmd,
drm_agp_head_t *drm_agp_init(void)
{
- drm_agp_fill_t *fill;
drm_agp_head_t *head = NULL;
- int agp_available = 1;
-
- for (fill = &drm_agp_fill[0]; fill->name; fill++) {
- char *n = (char *)fill->name;
- *fill->f = (drm_agp_func_u)get_module_symbol(NULL, n);
- DRM_DEBUG("%s resolves to 0x%08lx\n", n, (*fill->f).address);
- if (!(*fill->f).address) agp_available = 0;
- }
-
- DRM_DEBUG("agp_available = %d\n", agp_available);
- if (agp_available) {
+ drm_agp = DRM_AGP_GET;
+ if (drm_agp) {
if (!(head = drm_alloc(sizeof(*head), DRM_MEM_AGPLISTS)))
return NULL;
memset((void *)head, 0, sizeof(*head));
- (*drm_agp.copy_info)(&head->agp_info);
+ drm_agp->copy_info(&head->agp_info);
if (head->agp_info.chipset == NOT_SUPPORTED) {
drm_free(head, sizeof(*head), DRM_MEM_AGPLISTS);
return NULL;
@@ -310,9 +271,9 @@ drm_agp_head_t *drm_agp_init(void)
#if LINUX_VERSION_CODE >= 0x020400
case VIA_MVP4: head->chipset = "VIA MVP4"; break;
- case VIA_APOLLO_KX133: head->chipset = "VIA Apollo KX133";
+ case VIA_APOLLO_KX133: head->chipset = "VIA Apollo KX133";
break;
- case VIA_APOLLO_KT133: head->chipset = "VIA Apollo KT133";
+ case VIA_APOLLO_KT133: head->chipset = "VIA Apollo KT133";
break;
#endif
@@ -337,12 +298,31 @@ drm_agp_head_t *drm_agp_init(void)
void drm_agp_uninit(void)
{
- drm_agp_fill_t *fill;
-
- for (fill = &drm_agp_fill[0]; fill->name; fill++) {
-#if LINUX_VERSION_CODE >= 0x020400
- if ((*fill->f).address) put_module_symbol((*fill->f).address);
-#endif
- (*fill->f).address = 0;
- }
+ DRM_AGP_PUT;
+ drm_agp = NULL;
+}
+
+agp_memory *drm_agp_allocate_memory(size_t pages, u32 type)
+{
+ if (!drm_agp->allocate_memory) return NULL;
+ return drm_agp->allocate_memory(pages, type);
+}
+
+int drm_agp_free_memory(agp_memory *handle)
+{
+ if (!handle || !drm_agp->free_memory) return 0;
+ drm_agp->free_memory(handle);
+ return 1;
+}
+
+int drm_agp_bind_memory(agp_memory *handle, off_t start)
+{
+ if (!handle || !drm_agp->bind_memory) return -EINVAL;
+ return drm_agp->bind_memory(handle, start);
+}
+
+int drm_agp_unbind_memory(agp_memory *handle)
+{
+ if (!handle || !drm_agp->unbind_memory) return -EINVAL;
+ return drm_agp->unbind_memory(handle);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 01:59:10 +0000