diff --git a/sys/conf/files b/sys/conf/files
index 204ca3a0af..7df20ff711 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -2267,7 +2267,6 @@ opencrypto/skipjack.c			optional crypto
 opencrypto/xform.c			optional crypto
 dev/crypto/hifn/hifn7751.c		optional hifn
 dev/crypto/ubsec/ubsec.c		optional ubsec
-dev/drm/ati_pcigart.c			optional drm compile-with "${NORMAL_C} -include $S/dev/drm/kconfig.h ${WERROR}"
 # drm_agpsupport.c must be included if CONFIG_AGP is set
 #dev/drm/drm_agpsupport.c		optional drm compile-with "${NORMAL_C} -include $S/dev/drm/kconfig.h ${WERROR}"
 dev/drm/drm_atomic.c			optional drm compile-with "${NORMAL_C} -include $S/dev/drm/kconfig.h ${WERROR}"
diff --git a/sys/dev/drm/ati_pcigart.c b/sys/dev/drm/ati_pcigart.c
deleted file mode 100644
index c00d4552c3..0000000000
--- a/sys/dev/drm/ati_pcigart.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/**
- * \file ati_pcigart.c
- * ATI PCI GART support
- *
- * \author Gareth Hughes <gareth@valinux.com>
- */
-
-/*
- * Created: Wed Dec 13 21:52:19 2000 by gareth@valinux.com
- *
- * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * 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
- * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * 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.
- *
- * $FreeBSD: head/sys/dev/drm2/ati_pcigart.c 254885 2013-08-25 19:37:15Z dumbbell $
- */
-
-#include <drm/drmP.h>
-
-#include <drm/ati_pcigart.h>
-
-#define ATI_PCIGART_PAGE_SIZE		4096	/**< PCI GART page size */
-
-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)
-		return -ENOMEM;
-
-	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);
-	gart_info->table_handle = NULL;
-}
-
-int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
-{
-	struct drm_sg_mem *entry = dev->sg;
-#ifdef __linux__
-	unsigned long pages;
-	int i;
-	int max_pages;
-#endif
-
-	/* we need to support large memory configurations */
-	if (!entry) {
-		DRM_ERROR("no scatter/gather memory!\n");
-		return 0;
-	}
-
-	if (gart_info->bus_addr) {
-#ifdef __linux__
-
-		max_pages = (gart_info->table_size / sizeof(u32));
-		pages = (entry->pages <= max_pages)
-		  ? entry->pages : max_pages;
-
-		for (i = 0; i < pages; i++) {
-			if (!entry->busaddr[i])
-				break;
-			pci_unmap_page(dev->pdev, entry->busaddr[i],
-					 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
-		}
-#endif
-
-		if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
-			gart_info->bus_addr = 0;
-	}
-
-	if (gart_info->gart_table_location == DRM_ATI_GART_MAIN &&
-	    gart_info->table_handle) {
-		drm_ati_free_pcigart_table(dev, gart_info);
-	}
-
-	return 1;
-}
-
-int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
-{
-	struct drm_local_map *map = &gart_info->mapping;
-	struct drm_sg_mem *entry = dev->sg;
-	void *address = NULL;
-	unsigned long pages;
-	u32 *pci_gart = NULL, page_base, gart_idx;
-	dma_addr_t bus_address = 0;
-	int i, j, ret = 0;
-	int max_ati_pages, max_real_pages;
-
-	if (!entry) {
-		DRM_ERROR("no scatter/gather memory!\n");
-		goto done;
-	}
-
-	if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
-		DRM_DEBUG("PCI: no table in VRAM: using normal RAM\n");
-
-#ifdef __linux__
-		if (pci_set_dma_mask(dev->pdev, gart_info->table_mask)) {
-			DRM_ERROR("fail to set dma mask to 0x%Lx\n",
-				  (unsigned long long)gart_info->table_mask);
-			ret = 1;
-			goto done;
-		}
-#endif
-
-		ret = drm_ati_alloc_pcigart_table(dev, gart_info);
-		if (ret) {
-			DRM_ERROR("cannot allocate PCI GART page!\n");
-			goto done;
-		}
-
-		pci_gart = gart_info->table_handle->vaddr;
-		address = gart_info->table_handle->vaddr;
-		bus_address = gart_info->table_handle->busaddr;
-	} else {
-		address = gart_info->addr;
-		bus_address = gart_info->bus_addr;
-		DRM_DEBUG("PCI: Gart Table: VRAM %08LX mapped at %08lX\n",
-			  (unsigned long long)bus_address,
-			  (unsigned long)address);
-	}
-
-
-	max_ati_pages = (gart_info->table_size / sizeof(u32));
-	max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
-	pages = (entry->pages <= max_real_pages)
-	    ? entry->pages : max_real_pages;
-
-	if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
-		memset(pci_gart, 0, max_ati_pages * sizeof(u32));
-	} else {
-		memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32));
-	}
-
-	gart_idx = 0;
-	for (i = 0; i < pages; i++) {
-#ifdef __linux__
-		/* we need to support large memory configurations */
-		entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
-						 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
-		if (pci_dma_mapping_error(dev->pdev, entry->busaddr[i])) {
-			DRM_ERROR("unable to map PCIGART pages!\n");
-			drm_ati_pcigart_cleanup(dev, gart_info);
-			address = NULL;
-			bus_address = 0;
-			goto done;
-		}
-#endif
-		page_base = (u32) entry->busaddr[i];
-
-		for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
-			u32 val;
-
-			switch(gart_info->gart_reg_if) {
-			case DRM_ATI_GART_IGP:
-				val = page_base | 0xc;
-				break;
-			case DRM_ATI_GART_PCIE:
-				val = (page_base >> 8) | 0xc;
-				break;
-			default:
-			case DRM_ATI_GART_PCI:
-				val = page_base;
-				break;
-			}
-			if (gart_info->gart_table_location ==
-			    DRM_ATI_GART_MAIN)
-				pci_gart[gart_idx] = cpu_to_le32(val);
-			else
-				DRM_WRITE32(map, gart_idx * sizeof(u32), val);
-			gart_idx++;
-			page_base += ATI_PCIGART_PAGE_SIZE;
-		}
-	}
-	ret = 1;
-
-	wbinvd();
-
-      done:
-	gart_info->addr = address;
-	gart_info->bus_addr = bus_address;
-	return ret;
-}
diff --git a/sys/dev/drm/drm/Makefile b/sys/dev/drm/drm/Makefile
index 1949828330..430fa9057f 100644
--- a/sys/dev/drm/drm/Makefile
+++ b/sys/dev/drm/drm/Makefile
@@ -1,7 +1,6 @@
 .PATH:	${.CURDIR}/.. ${.CURDIR}/../ttm
 KMOD	= drm
 SRCS	= \
-	ati_pcigart.c \
 	drm_atomic.c \
 	drm_atomic_helper.c \
 	drm_auth.c \
diff --git a/sys/dev/drm/include/drm/ati_pcigart.h b/sys/dev/drm/include/drm/ati_pcigart.h
deleted file mode 100644
index 5765648b5e..0000000000
--- a/sys/dev/drm/include/drm/ati_pcigart.h
+++ /dev/null
@@ -1,30 +0,0 @@
-#ifndef DRM_ATI_PCIGART_H
-#define DRM_ATI_PCIGART_H
-
-#include <drm/drm_legacy.h>
-
-/* location of GART table */
-#define DRM_ATI_GART_MAIN 1
-#define DRM_ATI_GART_FB   2
-
-#define DRM_ATI_GART_PCI 1
-#define DRM_ATI_GART_PCIE 2
-#define DRM_ATI_GART_IGP 3
-
-struct drm_ati_pcigart_info {
-	int gart_table_location;
-	int gart_reg_if;
-	void *addr;
-	dma_addr_t bus_addr;
-	dma_addr_t table_mask;
-	struct drm_dma_handle *table_handle;
-	struct drm_local_map mapping;
-	int table_size;
-};
-
-extern int drm_ati_pcigart_init(struct drm_device *dev,
-				struct drm_ati_pcigart_info * gart_info);
-extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
-				   struct drm_ati_pcigart_info * gart_info);
-
-#endif
diff --git a/sys/dev/drm/radeon/radeon_drv.h b/sys/dev/drm/radeon/radeon_drv.h
index afef2d9fcc..173deb4634 100644
--- a/sys/dev/drm/radeon/radeon_drv.h
+++ b/sys/dev/drm/radeon/radeon_drv.h
@@ -35,7 +35,6 @@
 #include <linux/platform_device.h>
 #include <drm/drm_legacy.h>
 
-#include <drm/ati_pcigart.h>
 #include "radeon_family.h"
 
 /* General customization:
