From: Dave Airlie Date: Sun, 19 Mar 2006 07:56:12 +0000 (+1100) Subject: drm: fixup PCI DMA support X-Git-Tag: firefly_0821_release~36570^2~11 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ddf19b973be5a96d77c8467f657fe5bd7d126e0f;p=firefly-linux-kernel-4.4.55.git drm: fixup PCI DMA support This patch makes the PCI support use the correct Linux interfaces finally. Tested in DRM CVS on PCI MGA card. Signed-off-by: Dave Airlie --- diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h index 107df9fdba4e..dbe952f899c0 100644 --- a/drivers/char/drm/drmP.h +++ b/drivers/char/drm/drmP.h @@ -357,6 +357,12 @@ typedef struct drm_freelist { spinlock_t lock; } drm_freelist_t; +typedef struct drm_dma_handle { + dma_addr_t busaddr; + void *vaddr; + size_t size; +} drm_dma_handle_t; + /** * Buffer entry. There is one of this for each buffer size order. */ @@ -366,7 +372,7 @@ typedef struct drm_buf_entry { drm_buf_t *buflist; /**< buffer list */ int seg_count; int page_order; - unsigned long *seglist; + drm_dma_handle_t **seglist; drm_freelist_t freelist; } drm_buf_entry_t; @@ -483,12 +489,6 @@ typedef struct drm_sigdata { drm_hw_lock_t *lock; } drm_sigdata_t; -typedef struct drm_dma_handle { - dma_addr_t busaddr; - void *vaddr; - size_t size; -} drm_dma_handle_t; - /** * Mappings list */ diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c index e2637b4d51de..8a9cf12e6183 100644 --- a/drivers/char/drm/drm_bufs.c +++ b/drivers/char/drm/drm_bufs.c @@ -474,8 +474,7 @@ static void drm_cleanup_buf_error(drm_device_t * dev, drm_buf_entry_t * entry) if (entry->seg_count) { for (i = 0; i < entry->seg_count; i++) { if (entry->seglist[i]) { - drm_free_pages(entry->seglist[i], - entry->page_order, DRM_MEM_DMA); + drm_pci_free(dev, entry->seglist[i]); } } drm_free(entry->seglist, @@ -678,7 +677,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) int total; int page_order; drm_buf_entry_t *entry; - unsigned long page; + drm_dma_handle_t *dmah; drm_buf_t *buf; int alignment; unsigned long offset; @@ -781,8 +780,10 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) page_count = 0; while (entry->buf_count < count) { - page = drm_alloc_pages(page_order, DRM_MEM_DMA); - if (!page) { + + dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000, 0xfffffffful); + + if (!dmah) { /* Set count correctly so we free the proper amount. */ entry->buf_count = count; entry->seg_count = count; @@ -794,13 +795,13 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) atomic_dec(&dev->buf_alloc); return -ENOMEM; } - entry->seglist[entry->seg_count++] = page; + entry->seglist[entry->seg_count++] = dmah; for (i = 0; i < (1 << page_order); i++) { DRM_DEBUG("page %d @ 0x%08lx\n", dma->page_count + page_count, - page + PAGE_SIZE * i); + (unsigned long)dmah->vaddr + PAGE_SIZE * i); temp_pagelist[dma->page_count + page_count++] - = page + PAGE_SIZE * i; + = (unsigned long)dmah->vaddr + PAGE_SIZE * i; } for (offset = 0; offset + size <= total && entry->buf_count < count; @@ -811,7 +812,8 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request) buf->order = order; buf->used = 0; buf->offset = (dma->byte_count + byte_count + offset); - buf->address = (void *)(page + offset); + buf->address = (void *)(dmah->vaddr + offset); + buf->bus_address = dmah->busaddr + offset; buf->next = NULL; buf->waiting = 0; buf->pending = 0; diff --git a/drivers/char/drm/drm_dma.c b/drivers/char/drm/drm_dma.c index 2afab95ca036..892db7096986 100644 --- a/drivers/char/drm/drm_dma.c +++ b/drivers/char/drm/drm_dma.c @@ -85,9 +85,7 @@ void drm_dma_takedown(drm_device_t * dev) dma->bufs[i].seg_count); for (j = 0; j < dma->bufs[i].seg_count; j++) { if (dma->bufs[i].seglist[j]) { - drm_free_pages(dma->bufs[i].seglist[j], - dma->bufs[i].page_order, - DRM_MEM_DMA); + drm_pci_free(dev, dma->bufs[i].seglist[j]); } } drm_free(dma->bufs[i].seglist, diff --git a/drivers/char/drm/drm_pci.c b/drivers/char/drm/drm_pci.c index 1fd7ff164817..b28ca9cea8a2 100644 --- a/drivers/char/drm/drm_pci.c +++ b/drivers/char/drm/drm_pci.c @@ -50,6 +50,10 @@ drm_dma_handle_t *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align, dma_addr_t maxaddr) { drm_dma_handle_t *dmah; +#if 1 + unsigned long addr; + size_t sz; +#endif #ifdef DRM_DEBUG_MEMORY int area = DRM_MEM_DMA; @@ -79,7 +83,7 @@ drm_dma_handle_t *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align, return NULL; dmah->size = size; - dmah->vaddr = pci_alloc_consistent(dev->pdev, size, &dmah->busaddr); + dmah->vaddr = dma_alloc_coherent(&dev->pdev->dev, size, &dmah->busaddr, GFP_KERNEL | __GFP_COMP); #ifdef DRM_DEBUG_MEMORY if (dmah->vaddr == NULL) { @@ -104,18 +108,29 @@ drm_dma_handle_t *drm_pci_alloc(drm_device_t * dev, size_t size, size_t align, memset(dmah->vaddr, 0, size); + /* 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 with freeing its descriptor. + * \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, drm_dma_handle_t * dmah) { +#if 1 + unsigned long addr; + size_t sz; +#endif #ifdef DRM_DEBUG_MEMORY int area = DRM_MEM_DMA; int alloc_count; @@ -127,8 +142,14 @@ void __drm_pci_free(drm_device_t * dev, drm_dma_handle_t * dmah) DRM_MEM_ERROR(area, "Attempt to free address 0\n"); #endif } else { - pci_free_consistent(dev->pdev, dmah->size, dmah->vaddr, - dmah->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); } #ifdef DRM_DEBUG_MEMORY