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authorMichel Daenzer <michel@daenzer.net>2003-05-16 23:41:27 +0000
committerMichel Daenzer <michel@daenzer.net>2003-05-16 23:41:27 +0000
commite5d3c7f260d18168eec755c73f01ac617390d96c (patch)
tree9628a3f566362142f10f7d0109a1a218cbc5ddc4 /linux-core
parent1d5bf7a7de35f87e68cce740151fd46cd8fa2ff3 (diff)
Support AGP bridges where the AGP aperture can't be accessed directly by
the CPU (David Mosberger, Benjamin Herrenschmidt, myself, Paul Mackerras, Jeff Wiedemeier)
Diffstat (limited to 'linux-core')
-rw-r--r--linux-core/drmP.h23
-rw-r--r--linux-core/drm_bufs.c4
-rw-r--r--linux-core/drm_drv.c2
-rw-r--r--linux-core/drm_memory.h165
-rw-r--r--linux-core/drm_memory_debug.h12
-rw-r--r--linux-core/drm_vm.c41
-rw-r--r--linux-core/i810_dma.c8
-rw-r--r--linux-core/i830_dma.c8
8 files changed, 215 insertions, 48 deletions
diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 43d3776f..1f0ef128 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -251,16 +251,16 @@ static inline struct page * vmalloc_to_page(void * vmalloc_addr)
if (len > DRM_PROC_LIMIT) { ret; *eof = 1; return len - offset; }
/* Mapping helper macros */
-#define DRM_IOREMAP(map) \
- (map)->handle = DRM(ioremap)( (map)->offset, (map)->size )
+#define DRM_IOREMAP(map, dev) \
+ (map)->handle = DRM(ioremap)( (map)->offset, (map)->size, (dev) )
-#define DRM_IOREMAP_NOCACHE(map) \
- (map)->handle = DRM(ioremap_nocache)((map)->offset, (map)->size)
+#define DRM_IOREMAP_NOCACHE(map, dev) \
+ (map)->handle = DRM(ioremap_nocache)((map)->offset, (map)->size, (dev))
-#define DRM_IOREMAPFREE(map) \
- do { \
- if ( (map)->handle && (map)->size ) \
- DRM(ioremapfree)( (map)->handle, (map)->size ); \
+#define DRM_IOREMAPFREE(map, dev) \
+ do { \
+ if ( (map)->handle && (map)->size ) \
+ DRM(ioremapfree)( (map)->handle, (map)->size, (dev) ); \
} while (0)
#define DRM_FIND_MAP(_map, _o) \
@@ -682,9 +682,10 @@ extern void DRM(free)(void *pt, size_t size, int area);
extern unsigned long DRM(alloc_pages)(int order, int area);
extern void DRM(free_pages)(unsigned long address, int order,
int area);
-extern void *DRM(ioremap)(unsigned long offset, unsigned long size);
-extern void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size);
-extern void DRM(ioremapfree)(void *pt, unsigned long size);
+extern void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev);
+extern void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size,
+ drm_device_t *dev);
+extern void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev);
#if __REALLY_HAVE_AGP
extern agp_memory *DRM(alloc_agp)(int pages, u32 type);
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index 84a9a611..6943eb3d 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -124,7 +124,7 @@ int DRM(addmap)( struct inode *inode, struct file *filp,
MTRR_TYPE_WRCOMB, 1 );
}
#endif
- map->handle = DRM(ioremap)( map->offset, map->size );
+ map->handle = DRM(ioremap)( map->offset, map->size, dev );
break;
case _DRM_SHM:
@@ -246,7 +246,7 @@ int DRM(rmmap)(struct inode *inode, struct file *filp,
DRM_DEBUG("mtrr_del = %d\n", retcode);
}
#endif
- DRM(ioremapfree)(map->handle, map->size);
+ DRM(ioremapfree)(map->handle, map->size, dev);
break;
case _DRM_SHM:
vfree(map->handle);
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 2d1a9448..0a4390d3 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -454,7 +454,7 @@ static int DRM(takedown)( drm_device_t *dev )
DRM_DEBUG( "mtrr_del=%d\n", retcode );
}
#endif
- DRM(ioremapfree)( map->handle, map->size );
+ DRM(ioremapfree)( map->handle, map->size, dev );
break;
case _DRM_SHM:
vfree(map->handle);
diff --git a/linux-core/drm_memory.h b/linux-core/drm_memory.h
index ae5737f1..5f111459 100644
--- a/linux-core/drm_memory.h
+++ b/linux-core/drm_memory.h
@@ -39,6 +39,159 @@
*/
#define DEBUG_MEMORY 0
+/* Need the 4-argument version of vmap(). */
+#if __REALLY_HAVE_AGP && defined(VMAP_4_ARGS)
+
+#include <linux/vmalloc.h>
+
+#ifdef HAVE_PAGE_AGP
+#include <asm/agp.h>
+#else
+# ifdef __powerpc__
+# define PAGE_AGP __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
+# else
+# define PAGE_AGP PAGE_KERNEL
+# endif
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+# include <asm/tlbflush.h>
+#else
+# define pte_offset_kernel(dir, address) pte_offset(dir, address)
+# define pte_pfn(pte) (pte_page(pte) - mem_map)
+# define pfn_to_page(pfn) (mem_map + (pfn))
+# define flush_tlb_kernel_range(s,e) flush_tlb_all()
+#endif
+
+/*
+ * Find the drm_map that covers the range [offset, offset+size).
+ */
+static inline drm_map_t *
+drm_lookup_map (unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+ struct list_head *list;
+ drm_map_list_t *r_list;
+ drm_map_t *map;
+
+ list_for_each(list, &dev->maplist->head) {
+ r_list = (drm_map_list_t *) list;
+ map = r_list->map;
+ if (!map)
+ continue;
+ if (map->offset <= offset && (offset + size) <= (map->offset + map->size))
+ return map;
+ }
+ return NULL;
+}
+
+static inline void *
+agp_remap (unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+ unsigned long *phys_addr_map, i, num_pages = PAGE_ALIGN(size) / PAGE_SIZE;
+ struct drm_agp_mem *agpmem;
+ struct page **page_map;
+ void *addr;
+
+ size = PAGE_ALIGN(size);
+
+#ifdef __alpha__
+ offset -= dev->hose->mem_space->start;
+#endif
+
+ for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next)
+ if (agpmem->bound <= offset
+ && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= (offset + size))
+ break;
+ if (!agpmem)
+ return NULL;
+
+ /*
+ * OK, we're mapping AGP space on a chipset/platform on which memory accesses by
+ * the CPU do not get remapped by the GART. We fix this by using the kernel's
+ * page-table instead (that's probably faster anyhow...).
+ */
+ /* note: use vmalloc() because num_pages could be large... */
+ page_map = vmalloc(num_pages * sizeof(struct page *));
+ if (!page_map)
+ return NULL;
+
+ phys_addr_map = agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE;
+ for (i = 0; i < num_pages; ++i)
+ page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
+ addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
+ vfree(page_map);
+ if (!addr)
+ return NULL;
+
+ flush_tlb_kernel_range((unsigned long) addr, (unsigned long) addr + size);
+ return addr;
+}
+
+static inline unsigned long
+drm_follow_page (void *vaddr)
+{
+ pgd_t *pgd = pgd_offset_k((unsigned long) vaddr);
+ pmd_t *pmd = pmd_offset(pgd, (unsigned long) vaddr);
+ pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr);
+ return pte_pfn(*ptep) << PAGE_SHIFT;
+}
+
+#endif /* __REALLY_HAVE_AGP && defined(VMAP_4_ARGS) */
+
+static inline void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+#if __REALLY_HAVE_AGP && defined(VMAP_4_ARGS)
+ if (dev->agp && dev->agp->cant_use_aperture) {
+ drm_map_t *map = drm_lookup_map(offset, size, dev);
+
+ if (map && map->type == _DRM_AGP)
+ return agp_remap(offset, size, dev);
+ }
+#endif
+
+ return ioremap(offset, size);
+}
+
+static inline void *drm_ioremap_nocache(unsigned long offset, unsigned long size,
+ drm_device_t *dev)
+{
+#if __REALLY_HAVE_AGP && defined(VMAP_4_ARGS)
+ if (dev->agp && dev->agp->cant_use_aperture) {
+ drm_map_t *map = drm_lookup_map(offset, size, dev);
+
+ if (map && map->type == _DRM_AGP)
+ return agp_remap(offset, size, dev);
+ }
+#endif
+
+ return ioremap_nocache(offset, size);
+}
+
+static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev)
+{
+#if __REALLY_HAVE_AGP && defined(VMAP_4_ARGS)
+ /*
+ * This is a bit ugly. It would be much cleaner if the DRM API would use separate
+ * routines for handling mappings in the AGP space. Hopefully this can be done in
+ * a future revision of the interface...
+ */
+ if (dev->agp && dev->agp->cant_use_aperture
+ && ((unsigned long) pt >= VMALLOC_START && (unsigned long) pt < VMALLOC_END))
+ {
+ unsigned long offset;
+ drm_map_t *map;
+
+ offset = drm_follow_page(pt) | ((unsigned long) pt & ~PAGE_MASK);
+ map = drm_lookup_map(offset, size, dev);
+ if (map && map->type == _DRM_AGP) {
+ vunmap(pt);
+ return;
+ }
+ }
+#endif
+
+ iounmap(pt);
+}
#if DEBUG_MEMORY
#include "drm_memory_debug.h"
@@ -119,19 +272,19 @@ void DRM(free_pages)(unsigned long address, int order, int area)
free_pages(address, order);
}
-void *DRM(ioremap)(unsigned long offset, unsigned long size)
+void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev)
{
- return ioremap(offset, size);
+ return drm_ioremap(offset, size, dev);
}
-void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size)
+void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size, drm_device_t *dev)
{
- return ioremap_nocache(offset, size);
+ return drm_ioremap_nocache(offset, size, dev);
}
-void DRM(ioremapfree)(void *pt, unsigned long size)
+void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev)
{
- iounmap(pt);
+ drm_ioremapfree(pt, size, dev);
}
#if __REALLY_HAVE_AGP
diff --git a/linux-core/drm_memory_debug.h b/linux-core/drm_memory_debug.h
index f4fd2425..d74267fb 100644
--- a/linux-core/drm_memory_debug.h
+++ b/linux-core/drm_memory_debug.h
@@ -270,7 +270,7 @@ void DRM(free_pages)(unsigned long address, int order, int area)
}
}
-void *DRM(ioremap)(unsigned long offset, unsigned long size)
+void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev)
{
void *pt;
@@ -280,7 +280,7 @@ void *DRM(ioremap)(unsigned long offset, unsigned long size)
return NULL;
}
- if (!(pt = ioremap(offset, size))) {
+ if (!(pt = drm_ioremap(offset, size, dev))) {
spin_lock(&DRM(mem_lock));
++DRM(mem_stats)[DRM_MEM_MAPPINGS].fail_count;
spin_unlock(&DRM(mem_lock));
@@ -293,7 +293,7 @@ void *DRM(ioremap)(unsigned long offset, unsigned long size)
return pt;
}
-void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size)
+void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size, drm_device_t *dev)
{
void *pt;
@@ -303,7 +303,7 @@ void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size)
return NULL;
}
- if (!(pt = ioremap_nocache(offset, size))) {
+ if (!(pt = drm_ioremap_nocache(offset, size, dev))) {
spin_lock(&DRM(mem_lock));
++DRM(mem_stats)[DRM_MEM_MAPPINGS].fail_count;
spin_unlock(&DRM(mem_lock));
@@ -316,7 +316,7 @@ void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size)
return pt;
}
-void DRM(ioremapfree)(void *pt, unsigned long size)
+void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev)
{
int alloc_count;
int free_count;
@@ -325,7 +325,7 @@ void DRM(ioremapfree)(void *pt, unsigned long size)
DRM_MEM_ERROR(DRM_MEM_MAPPINGS,
"Attempt to free NULL pointer\n");
else
- iounmap(pt);
+ drm_ioremapfree(pt, size, dev);
spin_lock(&DRM(mem_lock));
DRM(mem_stats)[DRM_MEM_MAPPINGS].bytes_freed += size;
diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index 76a10cf5..59b19da3 100644
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -108,12 +108,12 @@ struct page *DRM(vm_nopage)(struct vm_area_struct *vma,
* Get the page, inc the use count, and return it
*/
offset = (baddr - agpmem->bound) >> PAGE_SHIFT;
- agpmem->memory->memory[offset] &= dev->agp->page_mask;
page = virt_to_page(__va(agpmem->memory->memory[offset]));
get_page(page);
- DRM_DEBUG("baddr = 0x%lx page = 0x%p, offset = 0x%lx\n",
- baddr, __va(agpmem->memory->memory[offset]), offset);
+ DRM_DEBUG("baddr = 0x%lx page = 0x%p, offset = 0x%lx, count=%d\n",
+ baddr, __va(agpmem->memory->memory[offset]), offset,
+ atomic_read(&page->count));
return page;
}
@@ -207,7 +207,7 @@ void DRM(vm_shm_close)(struct vm_area_struct *vma)
DRM_DEBUG("mtrr_del = %d\n", retcode);
}
#endif
- DRM(ioremapfree)(map->handle, map->size);
+ DRM(ioremapfree)(map->handle, map->size, dev);
break;
case _DRM_SHM:
vfree(map->handle);
@@ -381,7 +381,16 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
if ( !priv->authenticated ) return -EACCES;
- if (!VM_OFFSET(vma)) return DRM(mmap_dma)(filp, vma);
+ /* We check for "dma". On Apple's UniNorth, it's valid to have
+ * the AGP mapped at physical address 0
+ * --BenH.
+ */
+ if (!VM_OFFSET(vma)
+#if __REALLY_HAVE_AGP
+ && (!dev->agp || dev->agp->agp_info.device->vendor != PCI_VENDOR_ID_APPLE)
+#endif
+ )
+ return DRM(mmap_dma)(filp, vma);
/* A sequential search of a linked list is
fine here because: 1) there will only be
@@ -421,15 +430,19 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
switch (map->type) {
case _DRM_AGP:
-#if defined(__alpha__)
+#if __REALLY_HAVE_AGP
+ if (dev->agp->cant_use_aperture) {
/*
- * On Alpha we can't talk to bus dma address from the
- * CPU, so for memory of type DRM_AGP, we'll deal with
- * sorting out the real physical pages and mappings
- * in nopage()
+ * On some platforms we can't talk to bus dma address from the CPU, so for
+ * memory of type DRM_AGP, we'll deal with sorting out the real physical
+ * pages and mappings in nopage()
*/
+#if defined(__powerpc__)
+ pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
+#endif
vma->vm_ops = &DRM(vm_ops);
break;
+ }
#endif
/* fall through to _DRM_FRAME_BUFFER... */
case _DRM_FRAME_BUFFER:
@@ -440,15 +453,15 @@ int DRM(mmap)(struct file *filp, struct vm_area_struct *vma)
pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
pgprot_val(vma->vm_page_prot) &= ~_PAGE_PWT;
}
-#elif defined(__ia64__)
- if (map->type != _DRM_AGP)
- vma->vm_page_prot =
- pgprot_writecombine(vma->vm_page_prot);
#elif defined(__powerpc__)
pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE | _PAGE_GUARDED;
#endif
vma->vm_flags |= VM_IO; /* not in core dump */
}
+#if defined(__ia64__)
+ if (map->type != _DRM_AGP)
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+#endif
offset = DRIVER_GET_REG_OFS();
#ifdef __sparc__
if (io_remap_page_range(DRM_RPR_ARG(vma) vma->vm_start,
diff --git a/linux-core/i810_dma.c b/linux-core/i810_dma.c
index 8e0e8f45..678610c6 100644
--- a/linux-core/i810_dma.c
+++ b/linux-core/i810_dma.c
@@ -253,7 +253,7 @@ int i810_dma_cleanup(drm_device_t *dev)
if(dev_priv->ring.virtual_start) {
DRM(ioremapfree)((void *) dev_priv->ring.virtual_start,
- dev_priv->ring.Size);
+ dev_priv->ring.Size, dev);
}
if (dev_priv->hw_status_page) {
pci_free_consistent(dev->pdev, PAGE_SIZE,
@@ -270,7 +270,7 @@ int i810_dma_cleanup(drm_device_t *dev)
drm_buf_t *buf = dma->buflist[ i ];
drm_i810_buf_priv_t *buf_priv = buf->dev_private;
if ( buf_priv->kernel_virtual && buf->total )
- DRM(ioremapfree)(buf_priv->kernel_virtual, buf->total);
+ DRM(ioremapfree)(buf_priv->kernel_virtual, buf->total, dev);
}
}
return 0;
@@ -340,7 +340,7 @@ static int i810_freelist_init(drm_device_t *dev, drm_i810_private_t *dev_priv)
*buf_priv->in_use = I810_BUF_FREE;
buf_priv->kernel_virtual = DRM(ioremap)(buf->bus_address,
- buf->total);
+ buf->total, dev);
}
return 0;
}
@@ -393,7 +393,7 @@ static int i810_dma_initialize(drm_device_t *dev,
dev_priv->ring.virtual_start = DRM(ioremap)(dev->agp->base +
init->ring_start,
- init->ring_size);
+ init->ring_size, dev);
if (dev_priv->ring.virtual_start == NULL) {
dev->dev_private = (void *) dev_priv;
diff --git a/linux-core/i830_dma.c b/linux-core/i830_dma.c
index af9c1cb7..48b64d7c 100644
--- a/linux-core/i830_dma.c
+++ b/linux-core/i830_dma.c
@@ -253,7 +253,7 @@ int i830_dma_cleanup(drm_device_t *dev)
if (dev_priv->ring.virtual_start) {
DRM(ioremapfree)((void *) dev_priv->ring.virtual_start,
- dev_priv->ring.Size);
+ dev_priv->ring.Size, dev);
}
if (dev_priv->hw_status_page) {
pci_free_consistent(dev->pdev, PAGE_SIZE,
@@ -271,7 +271,7 @@ int i830_dma_cleanup(drm_device_t *dev)
drm_buf_t *buf = dma->buflist[ i ];
drm_i830_buf_priv_t *buf_priv = buf->dev_private;
if ( buf_priv->kernel_virtual && buf->total )
- DRM(ioremapfree)(buf_priv->kernel_virtual, buf->total);
+ DRM(ioremapfree)(buf_priv->kernel_virtual, buf->total, dev);
}
}
return 0;
@@ -347,7 +347,7 @@ static int i830_freelist_init(drm_device_t *dev, drm_i830_private_t *dev_priv)
*buf_priv->in_use = I830_BUF_FREE;
buf_priv->kernel_virtual = DRM(ioremap)(buf->bus_address,
- buf->total);
+ buf->total, dev);
}
return 0;
}
@@ -401,7 +401,7 @@ static int i830_dma_initialize(drm_device_t *dev,
dev_priv->ring.virtual_start = DRM(ioremap)(dev->agp->base +
init->ring_start,
- init->ring_size);
+ init->ring_size, dev);
if (dev_priv->ring.virtual_start == NULL) {
dev->dev_private = (void *) dev_priv;