Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / drivers / char / drm / drm_pci.c

diff --git a/drivers/char/drm/drm_pci.c b/drivers/char/drm/drm_pci.c
index 192e876..86a0f1c 100644 (file)
--- a/drivers/char/drm/drm_pci.c
+++ b/drivers/char/drm/drm_pci.c
@@ -37,6 +37,7 @@
  */
 
 #include <linux/pci.h>
+#include <linux/dma-mapping.h>
 #include "drmP.h"
 
 /**********************************************************************/
@@ -46,11 +47,15 @@
 /**
  * \brief Allocate a PCI consistent memory block, for DMA.
  */
-void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
-                   dma_addr_t maxaddr, dma_addr_t * busaddr)
+drm_dma_handle_t *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
+                               dma_addr_t maxaddr)
 {
-       void *address;
-#if DRM_DEBUG_MEMORY
+       drm_dma_handle_t *dmah;
+#if 1
+       unsigned long addr;
+       size_t sz;
+#endif
+#ifdef DRM_DEBUG_MEMORY
        int area = DRM_MEM_DMA;
 
        spin_lock(&drm_mem_lock);
@@ -74,13 +79,19 @@ void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
                return NULL;
        }
 
-       address = pci_alloc_consistent(dev->pdev, size, busaddr);
+       dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
+       if (!dmah)
+               return NULL;
+
+       dmah->size = size;
+       dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP);
 
-#if DRM_DEBUG_MEMORY
-       if (address == NULL) {
+#ifdef DRM_DEBUG_MEMORY
+       if (dmah->vaddr == NULL) {
                spin_lock(&drm_mem_lock);
                ++drm_mem_stats[area].fail_count;
                spin_unlock(&drm_mem_lock);
+               kfree(dmah);
                return NULL;
        }
 
@@ -90,37 +101,59 @@ void *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align,
        drm_ram_used += size;
        spin_unlock(&drm_mem_lock);
 #else
-       if (address == NULL)
+       if (dmah->vaddr == NULL) {
+               kfree(dmah);
                return NULL;
+       }
 #endif
 
-       memset(address, 0, size);
+       memset(dmah->vaddr, 0, size);
 
-       return address;
+       /* XXX - Is virt_to_page() legal for consistent mem? */
+       /* Reserve */
+       for (addr = (unsigned long)dmah->vaddr, sz = size;
+            sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+               SetPageReserved(virt_to_page(addr));
+       }
+
+       return dmah;
 }
+
 EXPORT_SYMBOL(drm_pci_alloc);
 
 /**
- * \brief Free a PCI consistent memory block.
+ * \brief Free a PCI consistent memory block without freeing its descriptor.
+ *
+ * This function is for internal use in the Linux-specific DRM core code.
  */
-void
-drm_pci_free(drm_device_t * dev, size_t size, void *vaddr, dma_addr_t busaddr)
+void __drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah)
 {
-#if DRM_DEBUG_MEMORY
+#if 1
+       unsigned long addr;
+       size_t sz;
+#endif
+#ifdef DRM_DEBUG_MEMORY
        int area = DRM_MEM_DMA;
        int alloc_count;
        int free_count;
 #endif
 
-       if (!vaddr) {
-#if DRM_DEBUG_MEMORY
+       if (!dmah->vaddr) {
+#ifdef DRM_DEBUG_MEMORY
                DRM_MEM_ERROR(area, "Attempt to free address 0\n");
 #endif
        } else {
-               pci_free_consistent(dev->pdev, size, vaddr, busaddr);
+               /* XXX - Is virt_to_page() legal for consistent mem? */
+               /* Unreserve */
+               for (addr = (unsigned long)dmah->vaddr, sz = dmah->size;
+                    sz > 0; addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+                       ClearPageReserved(virt_to_page(addr));
+               }
+               dma_free_coherent(&dev->pdev->dev, dmah->size, dmah->vaddr,
+                                 dmah->busaddr);
        }
 
-#if DRM_DEBUG_MEMORY
+#ifdef DRM_DEBUG_MEMORY
        spin_lock(&drm_mem_lock);
        free_count = ++drm_mem_stats[area].free_count;
        alloc_count = drm_mem_stats[area].succeed_count;
@@ -135,6 +168,16 @@ drm_pci_free(drm_device_t * dev, size_t size, void *vaddr, dma_addr_t busaddr)
 #endif
 
 }
+
+/**
+ * \brief Free a PCI consistent memory block
+ */
+void drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah)
+{
+       __drm_pci_free(dev, dmah);
+       kfree(dmah);
+}
+
 EXPORT_SYMBOL(drm_pci_free);
 
 /*@}*/