drm: remove usage of drm_pci_alloc/free

Remove usage of legacy dma-api abstraction in preparation for removal

Signed-off-by: Joseph Kogut <joseph.kogut@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210423020248.3427369-1-joseph.kogut@gmail.com

drivers/gpu/drm/drm_bufs.c

@@ -675,12 +675,17 @@ int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data,
 static void drm_cleanup_buf_error(struct drm_device *dev,
 				  struct drm_buf_entry *entry)
 {
+	drm_dma_handle_t *dmah;
 	int i;
 
 	if (entry->seg_count) {
 		for (i = 0; i < entry->seg_count; i++) {
 			if (entry->seglist[i]) {
-				drm_pci_free(dev, entry->seglist[i]);
+				dmah = entry->seglist[i];
+				dma_free_coherent(dev->dev,
+						  dmah->size,
+						  dmah->vaddr,
+						  dmah->busaddr);
 			}
 		}
 		kfree(entry->seglist);
@@ -979,10 +984,18 @@ int drm_legacy_addbufs_pci(struct drm_device *dev,
 	page_count = 0;
 
 	while (entry->buf_count < count) {
+		dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
+		if (!dmah)
+			return -ENOMEM;
 
-		dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000);
+		dmah->size = total;
+		dmah->vaddr = dma_alloc_coherent(dev->dev,
+						 dmah->size,
+						 &dmah->busaddr,
+						 GFP_KERNEL);
+		if (!dmah->vaddr) {
+			kfree(dmah);
 
-		if (!dmah) {
 			/* Set count correctly so we free the proper amount. */
 			entry->buf_count = count;
 			entry->seg_count = count;

drivers/gpu/drm/drm_dma.c

@@ -81,6 +81,7 @@ int drm_legacy_dma_setup(struct drm_device *dev)
 void drm_legacy_dma_takedown(struct drm_device *dev)
 {
 	struct drm_device_dma *dma = dev->dma;
+	drm_dma_handle_t *dmah;
 	int i, j;
 
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA) ||
@@ -100,7 +101,12 @@ void drm_legacy_dma_takedown(struct drm_device *dev)
 				  dma->bufs[i].seg_count);
 			for (j = 0; j < dma->bufs[i].seg_count; j++) {
 				if (dma->bufs[i].seglist[j]) {
-					drm_pci_free(dev, dma->bufs[i].seglist[j]);
+					dmah = dma->bufs[i].seglist[j];
+					dma_free_coherent(dev->dev,
+							  dmah->size,
+							  dmah->vaddr,
+							  dmah->busaddr);
+					kfree(dmah);
 				}
 			}
 			kfree(dma->bufs[i].seglist);

drivers/gpu/drm/r128/ati_pcigart.c

@@ -45,18 +45,32 @@
 static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
 				       struct drm_ati_pcigart_info *gart_info)
 {
-	gart_info->table_handle = drm_pci_alloc(dev, gart_info->table_size,
-						PAGE_SIZE);
-	if (gart_info->table_handle == NULL)
+	drm_dma_handle_t *dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
+
+	if (!dmah)
 		return -ENOMEM;
 
+	dmah->size = gart_info->table_size;
+	dmah->vaddr = dma_alloc_coherent(dev->dev,
+					 dmah->size,
+					 &dmah->busaddr,
+					 GFP_KERNEL);
+
+	if (!dmah->vaddr) {
+		kfree(dmah);
+		return -ENOMEM;
+	}
+
+	gart_info->table_handle = dmah;
 	return 0;
 }
 
 static void drm_ati_free_pcigart_table(struct drm_device *dev,
 				       struct drm_ati_pcigart_info *gart_info)
 {
-	drm_pci_free(dev, gart_info->table_handle);
+	drm_dma_handle_t *dmah = gart_info->table_handle;
+
+	dma_free_coherent(dev->dev, dmah->size, dmah->vaddr, dmah->busaddr);
 	gart_info->table_handle = NULL;
 }