drm/lima: use drm_gem_shmem_helpers

Do not need to maintain our own shmem memory management
code as drm_gem_shmem_helpers provides it. And we can
also benifit from the work of others with shared code.

This is also a preparation for implementing buffer madv.

Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191010140152.17747-2-yuq825@gmail.com

12 files changed, 145 insertions, 360 deletions

diff --git a/drivers/gpu/drm/lima/Kconfig b/drivers/gpu/drm/lima/Kconfig
index bb4ddc6bb0a6..571dc369a7e9 100644
--- a/drivers/gpu/drm/lima/Kconfig
+++ b/drivers/gpu/drm/lima/Kconfig
@@ -9,5 +9,6 @@ config DRM_LIMA
        depends on COMMON_CLK
        depends on OF
        select DRM_SCHED
+       select DRM_GEM_SHMEM_HELPER
        help
          DRM driver for ARM Mali 400/450 GPUs.
diff --git a/drivers/gpu/drm/lima/Makefile b/drivers/gpu/drm/lima/Makefile
index 38cc70281ba5..a85444b0a1d4 100644
--- a/drivers/gpu/drm/lima/Makefile
+++ b/drivers/gpu/drm/lima/Makefile
@@ -13,9 +13,7 @@ lima-y := \
 	lima_vm.o \
 	lima_sched.o \
 	lima_ctx.o \
-	lima_gem_prime.o \
 	lima_dlbu.o \
-	lima_bcast.o \
-	lima_object.o
+	lima_bcast.o
 
 obj-$(CONFIG_DRM_LIMA) += lima.o
diff --git a/drivers/gpu/drm/lima/lima_drv.c b/drivers/gpu/drm/lima/lima_drv.c
index 75ec703d22e0..124efe4fa97b 100644
--- a/drivers/gpu/drm/lima/lima_drv.c
+++ b/drivers/gpu/drm/lima/lima_drv.c
@@ -12,7 +12,6 @@
 
 #include "lima_drv.h"
 #include "lima_gem.h"
-#include "lima_gem_prime.h"
 #include "lima_vm.h"
 
 int lima_sched_timeout_ms;
@@ -240,16 +239,7 @@ static const struct drm_ioctl_desc lima_drm_driver_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(LIMA_CTX_FREE, lima_ioctl_ctx_free, DRM_RENDER_ALLOW),
 };
 
-static const struct file_operations lima_drm_driver_fops = {
-	.owner              = THIS_MODULE,
-	.open               = drm_open,
-	.release            = drm_release,
-	.unlocked_ioctl     = drm_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl       = drm_compat_ioctl,
-#endif
-	.mmap               = lima_gem_mmap,
-};
+DEFINE_DRM_GEM_FOPS(lima_drm_driver_fops);
 
 static struct drm_driver lima_drm_driver = {
 	.driver_features    = DRIVER_RENDER | DRIVER_GEM | DRIVER_SYNCOBJ,
@@ -258,10 +248,6 @@ static struct drm_driver lima_drm_driver = {
 	.ioctls             = lima_drm_driver_ioctls,
 	.num_ioctls         = ARRAY_SIZE(lima_drm_driver_ioctls),
 	.fops               = &lima_drm_driver_fops,
-	.gem_free_object_unlocked = lima_gem_free_object,
-	.gem_open_object    = lima_gem_object_open,
-	.gem_close_object   = lima_gem_object_close,
-	.gem_vm_ops         = &lima_gem_vm_ops,
 	.name               = "lima",
 	.desc               = "lima DRM",
 	.date               = "20190217",
@@ -269,11 +255,11 @@ static struct drm_driver lima_drm_driver = {
 	.minor              = 0,
 	.patchlevel         = 0,
 
+	.gem_create_object  = lima_gem_create_object,
 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
-	.gem_prime_import_sg_table = lima_gem_prime_import_sg_table,
+	.gem_prime_import_sg_table = drm_gem_shmem_prime_import_sg_table,
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
-	.gem_prime_get_sg_table = lima_gem_prime_get_sg_table,
-	.gem_prime_mmap = lima_gem_prime_mmap,
+	.gem_prime_mmap = drm_gem_prime_mmap,
 };
 
 static int lima_pdev_probe(struct platform_device *pdev)
diff --git a/drivers/gpu/drm/lima/lima_gem.c b/drivers/gpu/drm/lima/lima_gem.c
index 4da21353c3a2..4a62455fa0aa 100644
--- a/drivers/gpu/drm/lima/lima_gem.c
+++ b/drivers/gpu/drm/lima/lima_gem.c
@@ -3,7 +3,7 @@
 
 #include <linux/mm.h>
 #include <linux/sync_file.h>
-#include <linux/pfn_t.h>
+#include <linux/pagemap.h>
 
 #include <drm/drm_file.h>
 #include <drm/drm_syncobj.h>
@@ -13,40 +13,55 @@
 
 #include "lima_drv.h"
 #include "lima_gem.h"
-#include "lima_gem_prime.h"
 #include "lima_vm.h"
-#include "lima_object.h"
 
 int lima_gem_create_handle(struct drm_device *dev, struct drm_file *file,
 			   u32 size, u32 flags, u32 *handle)
 {
 	int err;
-	struct lima_bo *bo;
-	struct lima_device *ldev = to_lima_dev(dev);
+	gfp_t mask;
+	struct drm_gem_shmem_object *shmem;
+	struct drm_gem_object *obj;
+	struct sg_table *sgt;
+
+	shmem = drm_gem_shmem_create(dev, size);
+	if (IS_ERR(shmem))
+		return PTR_ERR(shmem);
 
-	bo = lima_bo_create(ldev, size, flags, NULL);
-	if (IS_ERR(bo))
-		return PTR_ERR(bo);
+	obj = &shmem->base;
 
-	err = drm_gem_handle_create(file, &bo->gem, handle);
+	/* Mali Utgard GPU can only support 32bit address space */
+	mask = mapping_gfp_mask(obj->filp->f_mapping);
+	mask &= ~__GFP_HIGHMEM;
+	mask |= __GFP_DMA32;
+	mapping_set_gfp_mask(obj->filp->f_mapping, mask);
+
+	sgt = drm_gem_shmem_get_pages_sgt(obj);
+	if (IS_ERR(sgt)) {
+		err = PTR_ERR(sgt);
+		goto out;
+	}
 
+	err = drm_gem_handle_create(file, obj, handle);
+
+out:
 	/* drop reference from allocate - handle holds it now */
-	drm_gem_object_put_unlocked(&bo->gem);
+	drm_gem_object_put_unlocked(obj);
 
 	return err;
 }
 
-void lima_gem_free_object(struct drm_gem_object *obj)
+static void lima_gem_free_object(struct drm_gem_object *obj)
 {
 	struct lima_bo *bo = to_lima_bo(obj);
 
 	if (!list_empty(&bo->va))
 		dev_err(obj->dev->dev, "lima gem free bo still has va\n");
 
-	lima_bo_destroy(bo);
+	drm_gem_shmem_free_object(obj);
 }
 
-int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file)
+static int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file)
 {
 	struct lima_bo *bo = to_lima_bo(obj);
 	struct lima_drm_priv *priv = to_lima_drm_priv(file);
@@ -55,7 +70,7 @@ int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file)
 	return lima_vm_bo_add(vm, bo, true);
 }
 
-void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file)
+static void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file)
 {
 	struct lima_bo *bo = to_lima_bo(obj);
 	struct lima_drm_priv *priv = to_lima_drm_priv(file);
@@ -64,13 +79,41 @@ void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file)
 	lima_vm_bo_del(vm, bo);
 }
 
+static const struct drm_gem_object_funcs lima_gem_funcs = {
+	.free = lima_gem_free_object,
+	.open = lima_gem_object_open,
+	.close = lima_gem_object_close,
+	.print_info = drm_gem_shmem_print_info,
+	.pin = drm_gem_shmem_pin,
+	.unpin = drm_gem_shmem_unpin,
+	.get_sg_table = drm_gem_shmem_get_sg_table,
+	.vmap = drm_gem_shmem_vmap,
+	.vunmap = drm_gem_shmem_vunmap,
+	.mmap = drm_gem_shmem_mmap,
+};
+
+struct drm_gem_object *lima_gem_create_object(struct drm_device *dev, size_t size)
+{
+	struct lima_bo *bo;
+
+	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
+	if (!bo)
+		return NULL;
+
+	mutex_init(&bo->lock);
+	INIT_LIST_HEAD(&bo->va);
+
+	bo->base.base.funcs = &lima_gem_funcs;
+
+	return &bo->base.base;
+}
+
 int lima_gem_get_info(struct drm_file *file, u32 handle, u32 *va, u64 *offset)
 {
 	struct drm_gem_object *obj;
 	struct lima_bo *bo;
 	struct lima_drm_priv *priv = to_lima_drm_priv(file);
 	struct lima_vm *vm = priv->vm;
-	int err;
 
 	obj = drm_gem_object_lookup(file, handle);
 	if (!obj)
@@ -80,53 +123,9 @@ int lima_gem_get_info(struct drm_file *file, u32 handle, u32 *va, u64 *offset)
 
 	*va = lima_vm_get_va(vm, bo);
 
-	err = drm_gem_create_mmap_offset(obj);
-	if (!err)
-		*offset = drm_vma_node_offset_addr(&obj->vma_node);
+	*offset = drm_vma_node_offset_addr(&obj->vma_node);
 
 	drm_gem_object_put_unlocked(obj);
-	return err;
-}
-
-static vm_fault_t lima_gem_fault(struct vm_fault *vmf)
-{
-	struct vm_area_struct *vma = vmf->vma;
-	struct drm_gem_object *obj = vma->vm_private_data;
-	struct lima_bo *bo = to_lima_bo(obj);
-	pfn_t pfn;
-	pgoff_t pgoff;
-
-	/* We don't use vmf->pgoff since that has the fake offset: */
-	pgoff = (vmf->address - vma->vm_start) >> PAGE_SHIFT;
-	pfn = __pfn_to_pfn_t(page_to_pfn(bo->pages[pgoff]), PFN_DEV);
-
-	return vmf_insert_mixed(vma, vmf->address, pfn);
-}
-
-const struct vm_operations_struct lima_gem_vm_ops = {
-	.fault = lima_gem_fault,
-	.open = drm_gem_vm_open,
-	.close = drm_gem_vm_close,
-};
-
-void lima_set_vma_flags(struct vm_area_struct *vma)
-{
-	pgprot_t prot = vm_get_page_prot(vma->vm_flags);
-
-	vma->vm_flags |= VM_MIXEDMAP;
-	vma->vm_flags &= ~VM_PFNMAP;
-	vma->vm_page_prot = pgprot_writecombine(prot);
-}
-
-int lima_gem_mmap(struct file *filp, struct vm_area_struct *vma)
-{
-	int ret;
-
-	ret = drm_gem_mmap(filp, vma);
-	if (ret)
-		return ret;
-
-	lima_set_vma_flags(vma);
 	return 0;
 }
 
@@ -136,7 +135,7 @@ static int lima_gem_sync_bo(struct lima_sched_task *task, struct lima_bo *bo,
 	int err = 0;
 
 	if (!write) {
-		err = dma_resv_reserve_shared(bo->gem.resv, 1);
+		err = dma_resv_reserve_shared(lima_bo_resv(bo), 1);
 		if (err)
 			return err;
 	}
@@ -145,7 +144,7 @@ static int lima_gem_sync_bo(struct lima_sched_task *task, struct lima_bo *bo,
 	if (explicit)
 		return 0;
 
-	return drm_gem_fence_array_add_implicit(&task->deps, &bo->gem, write);
+	return drm_gem_fence_array_add_implicit(&task->deps, &bo->base.base, write);
 }
 
 static int lima_gem_lock_bos(struct lima_bo **bos, u32 nr_bos,
@@ -162,7 +161,7 @@ retry:
 			continue;
 		}
 
-		ret = ww_mutex_lock_interruptible(&bos[i]->gem.resv->lock, ctx);
+		ret = ww_mutex_lock_interruptible(&lima_bo_resv(bos[i])->lock, ctx);
 		if (ret < 0) {
 			contended = i;
 			goto err;
@@ -174,15 +173,15 @@ retry:
 
 err:
 	for (i--; i >= 0; i--)
-		ww_mutex_unlock(&bos[i]->gem.resv->lock);
+		ww_mutex_unlock(&lima_bo_resv(bos[i])->lock);
 
 	if (slow_locked >= 0)
-		ww_mutex_unlock(&bos[slow_locked]->gem.resv->lock);
+		ww_mutex_unlock(&lima_bo_resv(bos[slow_locked])->lock);
 
 	if (ret == -EDEADLK) {
 		/* we lost out in a seqno race, lock and retry.. */
 		ret = ww_mutex_lock_slow_interruptible(
-			&bos[contended]->gem.resv->lock, ctx);
+			&lima_bo_resv(bos[contended])->lock, ctx);
 		if (!ret) {
 			slow_locked = contended;
 			goto retry;
@@ -199,7 +198,7 @@ static void lima_gem_unlock_bos(struct lima_bo **bos, u32 nr_bos,
 	int i;
 
 	for (i = 0; i < nr_bos; i++)
-		ww_mutex_unlock(&bos[i]->gem.resv->lock);
+		ww_mutex_unlock(&lima_bo_resv(bos[i])->lock);
 	ww_acquire_fini(ctx);
 }
 
@@ -296,15 +295,15 @@ int lima_gem_submit(struct drm_file *file, struct lima_submit *submit)
 
 	for (i = 0; i < submit->nr_bos; i++) {
 		if (submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE)
-			dma_resv_add_excl_fence(bos[i]->gem.resv, fence);
+			dma_resv_add_excl_fence(lima_bo_resv(bos[i]), fence);
 		else
-			dma_resv_add_shared_fence(bos[i]->gem.resv, fence);
+			dma_resv_add_shared_fence(lima_bo_resv(bos[i]), fence);
 	}
 
 	lima_gem_unlock_bos(bos, submit->nr_bos, &ctx);
 
 	for (i = 0; i < submit->nr_bos; i++)
-		drm_gem_object_put_unlocked(&bos[i]->gem);
+		drm_gem_object_put_unlocked(&bos[i]->base.base);
 
 	if (out_sync) {
 		drm_syncobj_replace_fence(out_sync, fence);
@@ -324,7 +323,7 @@ err_out0:
 		if (!bos[i])
 			break;
 		lima_vm_bo_del(vm, bos[i]);
-		drm_gem_object_put_unlocked(&bos[i]->gem);
+		drm_gem_object_put_unlocked(&bos[i]->base.base);
 	}
 	if (out_sync)
 		drm_syncobj_put(out_sync);
diff --git a/drivers/gpu/drm/lima/lima_gem.h b/drivers/gpu/drm/lima/lima_gem.h
index 556111a01135..1800feb3e47f 100644
--- a/drivers/gpu/drm/lima/lima_gem.h
+++ b/drivers/gpu/drm/lima/lima_gem.h
@@ -4,19 +4,37 @@
 #ifndef __LIMA_GEM_H__
 #define __LIMA_GEM_H__
 
-struct lima_bo;
+#include <drm/drm_gem_shmem_helper.h>
+
 struct lima_submit;
 
-extern const struct vm_operations_struct lima_gem_vm_ops;
+struct lima_bo {
+	struct drm_gem_shmem_object base;
+
+	struct mutex lock;
+	struct list_head va;
+};
+
+static inline struct lima_bo *
+to_lima_bo(struct drm_gem_object *obj)
+{
+	return container_of(to_drm_gem_shmem_obj(obj), struct lima_bo, base);
+}
+
+static inline size_t lima_bo_size(struct lima_bo *bo)
+{
+	return bo->base.base.size;
+}
+
+static inline struct dma_resv *lima_bo_resv(struct lima_bo *bo)
+{
+	return bo->base.base.resv;
+}
 
-struct lima_bo *lima_gem_create_bo(struct drm_device *dev, u32 size, u32 flags);
+struct drm_gem_object *lima_gem_create_object(struct drm_device *dev, size_t size);
 int lima_gem_create_handle(struct drm_device *dev, struct drm_file *file,
 			   u32 size, u32 flags, u32 *handle);
-void lima_gem_free_object(struct drm_gem_object *obj);
-int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file);
-void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file);
 int lima_gem_get_info(struct drm_file *file, u32 handle, u32 *va, u64 *offset);
-int lima_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 int lima_gem_submit(struct drm_file *file, struct lima_submit *submit);
 int lima_gem_wait(struct drm_file *file, u32 handle, u32 op, s64 timeout_ns);
 
diff --git a/drivers/gpu/drm/lima/lima_gem_prime.c b/drivers/gpu/drm/lima/lima_gem_prime.c
deleted file mode 100644
index e3eb251e0a12..000000000000
--- a/drivers/gpu/drm/lima/lima_gem_prime.c
+++ /dev/null
@@ -1,46 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0 OR MIT
-/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
-
-#include <linux/dma-buf.h>
-#include <drm/drm_prime.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-
-#include "lima_device.h"
-#include "lima_object.h"
-#include "lima_gem.h"
-#include "lima_gem_prime.h"
-
-struct drm_gem_object *lima_gem_prime_import_sg_table(
-	struct drm_device *dev, struct dma_buf_attachment *attach,
-	struct sg_table *sgt)
-{
-	struct lima_device *ldev = to_lima_dev(dev);
-	struct lima_bo *bo;
-
-	bo = lima_bo_create(ldev, attach->dmabuf->size, 0, sgt);
-	if (IS_ERR(bo))
-		return ERR_CAST(bo);
-
-	return &bo->gem;
-}
-
-struct sg_table *lima_gem_prime_get_sg_table(struct drm_gem_object *obj)
-{
-	struct lima_bo *bo = to_lima_bo(obj);
-	int npages = obj->size >> PAGE_SHIFT;
-
-	return drm_prime_pages_to_sg(bo->pages, npages);
-}
-
-int lima_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
-{
-	int ret;
-
-	ret = drm_gem_mmap_obj(obj, obj->size, vma);
-	if (ret)
-		return ret;
-
-	lima_set_vma_flags(vma);
-	return 0;
-}
diff --git a/drivers/gpu/drm/lima/lima_gem_prime.h b/drivers/gpu/drm/lima/lima_gem_prime.h
deleted file mode 100644
index 34b4d35c21e3..000000000000
--- a/drivers/gpu/drm/lima/lima_gem_prime.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR MIT */
-/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
-
-#ifndef __LIMA_GEM_PRIME_H__
-#define __LIMA_GEM_PRIME_H__
-
-struct drm_gem_object *lima_gem_prime_import_sg_table(
-	struct drm_device *dev, struct dma_buf_attachment *attach,
-	struct sg_table *sgt);
-struct sg_table *lima_gem_prime_get_sg_table(struct drm_gem_object *obj);
-int lima_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma);
-
-#endif
diff --git a/drivers/gpu/drm/lima/lima_mmu.c b/drivers/gpu/drm/lima/lima_mmu.c
index 8e1651d6a61f..97ec09dee572 100644
--- a/drivers/gpu/drm/lima/lima_mmu.c
+++ b/drivers/gpu/drm/lima/lima_mmu.c
@@ -8,7 +8,6 @@
 #include "lima_device.h"
 #include "lima_mmu.h"
 #include "lima_vm.h"
-#include "lima_object.h"
 #include "lima_regs.h"
 
 #define mmu_write(reg, data) writel(data, ip->iomem + reg)
diff --git a/drivers/gpu/drm/lima/lima_object.c b/drivers/gpu/drm/lima/lima_object.c
deleted file mode 100644
index 87123b1d083c..000000000000
--- a/drivers/gpu/drm/lima/lima_object.c
+++ /dev/null
@@ -1,119 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0 OR MIT
-/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
-
-#include <drm/drm_prime.h>
-#include <linux/pagemap.h>
-#include <linux/dma-mapping.h>
-
-#include "lima_object.h"
-
-void lima_bo_destroy(struct lima_bo *bo)
-{
-	if (bo->sgt) {
-		kfree(bo->pages);
-		drm_prime_gem_destroy(&bo->gem, bo->sgt);
-	} else {
-		if (bo->pages_dma_addr) {
-			int i, npages = bo->gem.size >> PAGE_SHIFT;
-
-			for (i = 0; i < npages; i++) {
-				if (bo->pages_dma_addr[i])
-					dma_unmap_page(bo->gem.dev->dev,
-						       bo->pages_dma_addr[i],
-						       PAGE_SIZE, DMA_BIDIRECTIONAL);
-			}
-		}
-
-		if (bo->pages)
-			drm_gem_put_pages(&bo->gem, bo->pages, true, true);
-	}
-
-	kfree(bo->pages_dma_addr);
-	drm_gem_object_release(&bo->gem);
-	kfree(bo);
-}
-
-static struct lima_bo *lima_bo_create_struct(struct lima_device *dev, u32 size, u32 flags)
-{
-	struct lima_bo *bo;
-	int err;
-
-	size = PAGE_ALIGN(size);
-
-	bo = kzalloc(sizeof(*bo), GFP_KERNEL);
-	if (!bo)
-		return ERR_PTR(-ENOMEM);
-
-	mutex_init(&bo->lock);
-	INIT_LIST_HEAD(&bo->va);
-
-	err = drm_gem_object_init(dev->ddev, &bo->gem, size);
-	if (err) {
-		kfree(bo);
-		return ERR_PTR(err);
-	}
-
-	return bo;
-}
-
-struct lima_bo *lima_bo_create(struct lima_device *dev, u32 size,
-			       u32 flags, struct sg_table *sgt)
-{
-	int i, err;
-	size_t npages;
-	struct lima_bo *bo, *ret;
-
-	bo = lima_bo_create_struct(dev, size, flags);
-	if (IS_ERR(bo))
-		return bo;
-
-	npages = bo->gem.size >> PAGE_SHIFT;
-
-	bo->pages_dma_addr = kcalloc(npages, sizeof(dma_addr_t), GFP_KERNEL);
-	if (!bo->pages_dma_addr) {
-		ret = ERR_PTR(-ENOMEM);
-		goto err_out;
-	}
-
-	if (sgt) {
-		bo->sgt = sgt;
-
-		bo->pages = kcalloc(npages, sizeof(*bo->pages), GFP_KERNEL);
-		if (!bo->pages) {
-			ret = ERR_PTR(-ENOMEM);
-			goto err_out;
-		}
-
-		err = drm_prime_sg_to_page_addr_arrays(
-			sgt, bo->pages, bo->pages_dma_addr, npages);
-		if (err) {
-			ret = ERR_PTR(err);
-			goto err_out;
-		}
-	} else {
-		mapping_set_gfp_mask(bo->gem.filp->f_mapping, GFP_DMA32);
-		bo->pages = drm_gem_get_pages(&bo->gem);
-		if (IS_ERR(bo->pages)) {
-			ret = ERR_CAST(bo->pages);
-			bo->pages = NULL;
-			goto err_out;
-		}
-
-		for (i = 0; i < npages; i++) {
-			dma_addr_t addr = dma_map_page(dev->dev, bo->pages[i], 0,
-						       PAGE_SIZE, DMA_BIDIRECTIONAL);
-			if (dma_mapping_error(dev->dev, addr)) {
-				ret = ERR_PTR(-EFAULT);
-				goto err_out;
-			}
-			bo->pages_dma_addr[i] = addr;
-		}
-
-	}
-
-	return bo;
-
-err_out:
-	lima_bo_destroy(bo);
-	return ret;
-}
diff --git a/drivers/gpu/drm/lima/lima_object.h b/drivers/gpu/drm/lima/lima_object.h
deleted file mode 100644
index 31ca2d8dc0a1..000000000000
--- a/drivers/gpu/drm/lima/lima_object.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR MIT */
-/* Copyright 2018-2019 Qiang Yu <yuq825@gmail.com> */
-
-#ifndef __LIMA_OBJECT_H__
-#define __LIMA_OBJECT_H__
-
-#include <drm/drm_gem.h>
-
-#include "lima_device.h"
-
-struct lima_bo {
-	struct drm_gem_object gem;
-
-	struct page **pages;
-	dma_addr_t *pages_dma_addr;
-	struct sg_table *sgt;
-	void *vaddr;
-
-	struct mutex lock;
-	struct list_head va;
-};
-
-static inline struct lima_bo *
-to_lima_bo(struct drm_gem_object *obj)
-{
-	return container_of(obj, struct lima_bo, gem);
-}
-
-struct lima_bo *lima_bo_create(struct lima_device *dev, u32 size,
-			       u32 flags, struct sg_table *sgt);
-void lima_bo_destroy(struct lima_bo *bo);
-void *lima_bo_vmap(struct lima_bo *bo);
-void lima_bo_vunmap(struct lima_bo *bo);
-
-#endif
diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index 4127cacac454..f522c5f99729 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -10,7 +10,7 @@
 #include "lima_vm.h"
 #include "lima_mmu.h"
 #include "lima_l2_cache.h"
-#include "lima_object.h"
+#include "lima_gem.h"
 
 struct lima_fence {
 	struct dma_fence base;
@@ -117,7 +117,7 @@ int lima_sched_task_init(struct lima_sched_task *task,
 		return -ENOMEM;
 
 	for (i = 0; i < num_bos; i++)
-		drm_gem_object_get(&bos[i]->gem);
+		drm_gem_object_get(&bos[i]->base.base);
 
 	err = drm_sched_job_init(&task->base, &context->base, vm);
 	if (err) {
@@ -148,7 +148,7 @@ void lima_sched_task_fini(struct lima_sched_task *task)
 
 	if (task->bos) {
 		for (i = 0; i < task->num_bos; i++)
-			drm_gem_object_put_unlocked(&task->bos[i]->gem);
+			drm_gem_object_put_unlocked(&task->bos[i]->base.base);
 		kfree(task->bos);
 	}
 
diff --git a/drivers/gpu/drm/lima/lima_vm.c b/drivers/gpu/drm/lima/lima_vm.c
index 19e88ca16527..8e69c4540e8b 100644
--- a/drivers/gpu/drm/lima/lima_vm.c
+++ b/drivers/gpu/drm/lima/lima_vm.c
@@ -6,7 +6,7 @@
 
 #include "lima_device.h"
 #include "lima_vm.h"
-#include "lima_object.h"
+#include "lima_gem.h"
 #include "lima_regs.h"
 
 struct lima_bo_va {
@@ -32,7 +32,7 @@ struct lima_bo_va {
 #define LIMA_BTE(va) ((va & LIMA_VM_BT_MASK) >> LIMA_VM_BT_SHIFT)
 
 
-static void lima_vm_unmap_page_table(struct lima_vm *vm, u32 start, u32 end)
+static void lima_vm_unmap_range(struct lima_vm *vm, u32 start, u32 end)
 {
 	u32 addr;
 
@@ -44,41 +44,32 @@ static void lima_vm_unmap_page_table(struct lima_vm *vm, u32 start, u32 end)
 	}
 }
 
-static int lima_vm_map_page_table(struct lima_vm *vm, dma_addr_t *dma,
-				  u32 start, u32 end)
+static int lima_vm_map_page(struct lima_vm *vm, dma_addr_t pa, u32 va)
 {
-	u64 addr;
-	int i = 0;
-
-	for (addr = start; addr <= end; addr += LIMA_PAGE_SIZE) {
-		u32 pbe = LIMA_PBE(addr);
-		u32 bte = LIMA_BTE(addr);
-
-		if (!vm->bts[pbe].cpu) {
-			dma_addr_t pts;
-			u32 *pd;
-			int j;
-
-			vm->bts[pbe].cpu = dma_alloc_wc(
-				vm->dev->dev, LIMA_PAGE_SIZE << LIMA_VM_NUM_PT_PER_BT_SHIFT,
-				&vm->bts[pbe].dma, GFP_KERNEL | __GFP_ZERO);
-			if (!vm->bts[pbe].cpu) {
-				if (addr != start)
-					lima_vm_unmap_page_table(vm, start, addr - 1);
-				return -ENOMEM;
-			}
-
-			pts = vm->bts[pbe].dma;
-			pd = vm->pd.cpu + (pbe << LIMA_VM_NUM_PT_PER_BT_SHIFT);
-			for (j = 0; j < LIMA_VM_NUM_PT_PER_BT; j++) {
-				pd[j] = pts | LIMA_VM_FLAG_PRESENT;
-				pts += LIMA_PAGE_SIZE;
-			}
+	u32 pbe = LIMA_PBE(va);
+	u32 bte = LIMA_BTE(va);
+
+	if (!vm->bts[pbe].cpu) {
+		dma_addr_t pts;
+		u32 *pd;
+		int j;
+
+		vm->bts[pbe].cpu = dma_alloc_wc(
+			vm->dev->dev, LIMA_PAGE_SIZE << LIMA_VM_NUM_PT_PER_BT_SHIFT,
+			&vm->bts[pbe].dma, GFP_KERNEL | __GFP_ZERO);
+		if (!vm->bts[pbe].cpu)
+			return -ENOMEM;
+
+		pts = vm->bts[pbe].dma;
+		pd = vm->pd.cpu + (pbe << LIMA_VM_NUM_PT_PER_BT_SHIFT);
+		for (j = 0; j < LIMA_VM_NUM_PT_PER_BT; j++) {
+			pd[j] = pts | LIMA_VM_FLAG_PRESENT;
+			pts += LIMA_PAGE_SIZE;
 		}
-
-		vm->bts[pbe].cpu[bte] = dma[i++] | LIMA_VM_FLAGS_CACHE;
 	}
 
+	vm->bts[pbe].cpu[bte] = pa | LIMA_VM_FLAGS_CACHE;
+
 	return 0;
 }
 
@@ -100,7 +91,8 @@ lima_vm_bo_find(struct lima_vm *vm, struct lima_bo *bo)
 int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create)
 {
 	struct lima_bo_va *bo_va;
-	int err;
+	struct sg_dma_page_iter sg_iter;
+	int offset = 0, err;
 
 	mutex_lock(&bo->lock);
 
@@ -128,14 +120,18 @@ int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create)
 
 	mutex_lock(&vm->lock);
 
-	err = drm_mm_insert_node(&vm->mm, &bo_va->node, bo->gem.size);
+	err = drm_mm_insert_node(&vm->mm, &bo_va->node, lima_bo_size(bo));
 	if (err)
 		goto err_out1;
 
-	err = lima_vm_map_page_table(vm, bo->pages_dma_addr, bo_va->node.start,
-				     bo_va->node.start + bo_va->node.size - 1);
-	if (err)
-		goto err_out2;
+	for_each_sg_dma_page(bo->base.sgt->sgl, &sg_iter, bo->base.sgt->nents, 0) {
+		err = lima_vm_map_page(vm, sg_page_iter_dma_address(&sg_iter),
+				       bo_va->node.start + offset);
+		if (err)
+			goto err_out2;
+
+		offset += PAGE_SIZE;
+	}
 
 	mutex_unlock(&vm->lock);
 
@@ -145,6 +141,8 @@ int lima_vm_bo_add(struct lima_vm *vm, struct lima_bo *bo, bool create)
 	return 0;
 
 err_out2:
+	if (offset)
+		lima_vm_unmap_range(vm, bo_va->node.start, bo_va->node.start + offset - 1);
 	drm_mm_remove_node(&bo_va->node);
 err_out1:
 	mutex_unlock(&vm->lock);
@@ -168,8 +166,8 @@ void lima_vm_bo_del(struct lima_vm *vm, struct lima_bo *bo)
 
 	mutex_lock(&vm->lock);
 
-	lima_vm_unmap_page_table(vm, bo_va->node.start,
-				 bo_va->node.start + bo_va->node.size - 1);
+	lima_vm_unmap_range(vm, bo_va->node.start,
+			    bo_va->node.start + bo_va->node.size - 1);
 
 	drm_mm_remove_node(&bo_va->node);
 
@@ -215,9 +213,8 @@ struct lima_vm *lima_vm_create(struct lima_device *dev)
 		goto err_out0;
 
 	if (dev->dlbu_cpu) {
-		int err = lima_vm_map_page_table(
-			vm, &dev->dlbu_dma, LIMA_VA_RESERVE_DLBU,
-			LIMA_VA_RESERVE_DLBU + LIMA_PAGE_SIZE - 1);
+		int err = lima_vm_map_page(
+			vm, dev->dlbu_dma, LIMA_VA_RESERVE_DLBU);
 		if (err)
 			goto err_out1;
 	}