linux_dsm_epyc7002/drivers/gpu/drm/qxl/qxl_ttm.c
Gerd Hoffmann 11ca1b663a drm/qxl: use ttm_tt
qxl device will not dma, so we don't need ttm_dma_tt.  Go use ttm_tt
instead, to avoid wasting resources (swiotlb bounce buffers for
example).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190129082541.1392-1-kraxel@redhat.com
2019-01-30 10:51:35 +01:00

412 lines
11 KiB
C

/*
* Copyright 2013 Red Hat Inc.
*
* 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 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: Dave Airlie
* Alon Levy
*/
#include <drm/ttm/ttm_bo_api.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_page_alloc.h>
#include <drm/ttm/ttm_module.h>
#include <drm/drmP.h>
#include <drm/drm.h>
#include <drm/qxl_drm.h>
#include "qxl_drv.h"
#include "qxl_object.h"
#include <linux/delay.h>
static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
{
struct qxl_mman *mman;
struct qxl_device *qdev;
mman = container_of(bdev, struct qxl_mman, bdev);
qdev = container_of(mman, struct qxl_device, mman);
return qdev;
}
static struct vm_operations_struct qxl_ttm_vm_ops;
static const struct vm_operations_struct *ttm_vm_ops;
static vm_fault_t qxl_ttm_fault(struct vm_fault *vmf)
{
struct ttm_buffer_object *bo;
vm_fault_t ret;
bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
if (bo == NULL)
return VM_FAULT_NOPAGE;
ret = ttm_vm_ops->fault(vmf);
return ret;
}
int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct drm_file *file_priv;
struct qxl_device *qdev;
int r;
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
return -EINVAL;
file_priv = filp->private_data;
qdev = file_priv->minor->dev->dev_private;
if (qdev == NULL) {
DRM_ERROR(
"filp->private_data->minor->dev->dev_private == NULL\n");
return -EINVAL;
}
DRM_DEBUG_DRIVER("filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
filp->private_data, vma->vm_pgoff);
r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
if (unlikely(r != 0))
return r;
if (unlikely(ttm_vm_ops == NULL)) {
ttm_vm_ops = vma->vm_ops;
qxl_ttm_vm_ops = *ttm_vm_ops;
qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
}
vma->vm_ops = &qxl_ttm_vm_ops;
return 0;
}
static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
{
return 0;
}
static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
struct ttm_mem_type_manager *man)
{
struct qxl_device *qdev = qxl_get_qdev(bdev);
unsigned int gpu_offset_shift =
64 - (qdev->rom->slot_gen_bits + qdev->rom->slot_id_bits + 8);
struct qxl_memslot *slot;
switch (type) {
case TTM_PL_SYSTEM:
/* System memory */
man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_MASK_CACHING;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
case TTM_PL_VRAM:
case TTM_PL_PRIV:
/* "On-card" video ram */
slot = (type == TTM_PL_VRAM) ?
&qdev->main_slot : &qdev->surfaces_slot;
slot->gpu_offset = (uint64_t)type << gpu_offset_shift;
man->func = &ttm_bo_manager_func;
man->gpu_offset = slot->gpu_offset;
man->flags = TTM_MEMTYPE_FLAG_FIXED |
TTM_MEMTYPE_FLAG_MAPPABLE;
man->available_caching = TTM_PL_MASK_CACHING;
man->default_caching = TTM_PL_FLAG_CACHED;
break;
default:
DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
return -EINVAL;
}
return 0;
}
static void qxl_evict_flags(struct ttm_buffer_object *bo,
struct ttm_placement *placement)
{
struct qxl_bo *qbo;
static const struct ttm_place placements = {
.fpfn = 0,
.lpfn = 0,
.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM
};
if (!qxl_ttm_bo_is_qxl_bo(bo)) {
placement->placement = &placements;
placement->busy_placement = &placements;
placement->num_placement = 1;
placement->num_busy_placement = 1;
return;
}
qbo = to_qxl_bo(bo);
qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU, false);
*placement = qbo->placement;
}
static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
struct qxl_bo *qbo = to_qxl_bo(bo);
return drm_vma_node_verify_access(&qbo->gem_base.vma_node,
filp->private_data);
}
static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
struct qxl_device *qdev = qxl_get_qdev(bdev);
mem->bus.addr = NULL;
mem->bus.offset = 0;
mem->bus.size = mem->num_pages << PAGE_SHIFT;
mem->bus.base = 0;
mem->bus.is_iomem = false;
if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
return -EINVAL;
switch (mem->mem_type) {
case TTM_PL_SYSTEM:
/* system memory */
return 0;
case TTM_PL_VRAM:
mem->bus.is_iomem = true;
mem->bus.base = qdev->vram_base;
mem->bus.offset = mem->start << PAGE_SHIFT;
break;
case TTM_PL_PRIV:
mem->bus.is_iomem = true;
mem->bus.base = qdev->surfaceram_base;
mem->bus.offset = mem->start << PAGE_SHIFT;
break;
default:
return -EINVAL;
}
return 0;
}
static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
struct ttm_mem_reg *mem)
{
}
/*
* TTM backend functions.
*/
struct qxl_ttm_tt {
struct ttm_tt ttm;
struct qxl_device *qdev;
u64 offset;
};
static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
struct ttm_mem_reg *bo_mem)
{
struct qxl_ttm_tt *gtt = (void *)ttm;
gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
if (!ttm->num_pages) {
WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
ttm->num_pages, bo_mem, ttm);
}
/* Not implemented */
return -1;
}
static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
{
/* Not implemented */
return -1;
}
static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
{
struct qxl_ttm_tt *gtt = (void *)ttm;
ttm_tt_fini(&gtt->ttm);
kfree(gtt);
}
static struct ttm_backend_func qxl_backend_func = {
.bind = &qxl_ttm_backend_bind,
.unbind = &qxl_ttm_backend_unbind,
.destroy = &qxl_ttm_backend_destroy,
};
static struct ttm_tt *qxl_ttm_tt_create(struct ttm_buffer_object *bo,
uint32_t page_flags)
{
struct qxl_device *qdev;
struct qxl_ttm_tt *gtt;
qdev = qxl_get_qdev(bo->bdev);
gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
if (gtt == NULL)
return NULL;
gtt->ttm.func = &qxl_backend_func;
gtt->qdev = qdev;
if (ttm_tt_init(&gtt->ttm, bo, page_flags)) {
kfree(gtt);
return NULL;
}
return &gtt->ttm;
}
static void qxl_move_null(struct ttm_buffer_object *bo,
struct ttm_mem_reg *new_mem)
{
struct ttm_mem_reg *old_mem = &bo->mem;
BUG_ON(old_mem->mm_node != NULL);
*old_mem = *new_mem;
new_mem->mm_node = NULL;
}
static int qxl_bo_move(struct ttm_buffer_object *bo, bool evict,
struct ttm_operation_ctx *ctx,
struct ttm_mem_reg *new_mem)
{
struct ttm_mem_reg *old_mem = &bo->mem;
int ret;
ret = ttm_bo_wait(bo, ctx->interruptible, ctx->no_wait_gpu);
if (ret)
return ret;
if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
qxl_move_null(bo, new_mem);
return 0;
}
return ttm_bo_move_memcpy(bo, ctx, new_mem);
}
static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
bool evict,
struct ttm_mem_reg *new_mem)
{
struct qxl_bo *qbo;
struct qxl_device *qdev;
if (!qxl_ttm_bo_is_qxl_bo(bo))
return;
qbo = to_qxl_bo(bo);
qdev = qbo->gem_base.dev->dev_private;
if (bo->mem.mem_type == TTM_PL_PRIV && qbo->surface_id)
qxl_surface_evict(qdev, qbo, new_mem ? true : false);
}
static struct ttm_bo_driver qxl_bo_driver = {
.ttm_tt_create = &qxl_ttm_tt_create,
.invalidate_caches = &qxl_invalidate_caches,
.init_mem_type = &qxl_init_mem_type,
.eviction_valuable = ttm_bo_eviction_valuable,
.evict_flags = &qxl_evict_flags,
.move = &qxl_bo_move,
.verify_access = &qxl_verify_access,
.io_mem_reserve = &qxl_ttm_io_mem_reserve,
.io_mem_free = &qxl_ttm_io_mem_free,
.move_notify = &qxl_bo_move_notify,
};
int qxl_ttm_init(struct qxl_device *qdev)
{
int r;
int num_io_pages; /* != rom->num_io_pages, we include surface0 */
/* No others user of address space so set it to 0 */
r = ttm_bo_device_init(&qdev->mman.bdev,
&qxl_bo_driver,
qdev->ddev.anon_inode->i_mapping,
DRM_FILE_PAGE_OFFSET, 0);
if (r) {
DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
return r;
}
/* NOTE: this includes the framebuffer (aka surface 0) */
num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
num_io_pages);
if (r) {
DRM_ERROR("Failed initializing VRAM heap.\n");
return r;
}
r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV,
qdev->surfaceram_size / PAGE_SIZE);
if (r) {
DRM_ERROR("Failed initializing Surfaces heap.\n");
return r;
}
DRM_INFO("qxl: %uM of VRAM memory size\n",
(unsigned int)qdev->vram_size / (1024 * 1024));
DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
((unsigned int)num_io_pages * PAGE_SIZE) / (1024 * 1024));
DRM_INFO("qxl: %uM of Surface memory size\n",
(unsigned int)qdev->surfaceram_size / (1024 * 1024));
return 0;
}
void qxl_ttm_fini(struct qxl_device *qdev)
{
ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV);
ttm_bo_device_release(&qdev->mman.bdev);
DRM_INFO("qxl: ttm finalized\n");
}
#define QXL_DEBUGFS_MEM_TYPES 2
#if defined(CONFIG_DEBUG_FS)
static int qxl_mm_dump_table(struct seq_file *m, void *data)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
struct drm_device *dev = node->minor->dev;
struct qxl_device *rdev = dev->dev_private;
struct ttm_bo_global *glob = rdev->mman.bdev.glob;
struct drm_printer p = drm_seq_file_printer(m);
spin_lock(&glob->lru_lock);
drm_mm_print(mm, &p);
spin_unlock(&glob->lru_lock);
return 0;
}
#endif
int qxl_ttm_debugfs_init(struct qxl_device *qdev)
{
#if defined(CONFIG_DEBUG_FS)
static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
unsigned int i;
for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
if (i == 0)
sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
else
sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
qxl_mem_types_list[i].name = qxl_mem_types_names[i];
qxl_mem_types_list[i].show = &qxl_mm_dump_table;
qxl_mem_types_list[i].driver_features = 0;
if (i == 0)
qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
else
qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV].priv;
}
return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
#else
return 0;
#endif
}