Select Git revision
pvr_drv.c 29.30 KiB
// SPDX-License-Identifier: GPL-2.0-only OR MIT
/* Copyright (c) 2023 Imagination Technologies Ltd. */
#include "pvr_device.h"
#include "pvr_drv.h"
#include "pvr_rogue_defs.h"
#include "pvr_rogue_fwif_client.h"
#include "pvr_rogue_fwif_shared.h"
#include <uapi/drm/pvr_drm.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_gem.h>
#include <drm/drm_ioctl.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
/**
* DOC: PowerVR (Series 6 and later) and IMG Graphics Driver
*
* This driver supports the following PowerVR/IMG graphics cores from Imagination Technologies:
*
* * AXE-1-16M (found in Texas Instruments AM62)
*/
/**
* pvr_ioctl_create_bo() - IOCTL to create a GEM buffer object.
* @drm_dev: [IN] Target DRM device.
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_create_bo_args.
* @file: [IN] DRM file-private data.
*
* Called from userspace with %DRM_IOCTL_PVR_CREATE_BO.
*
* Return:
* * 0 on success,
* * -%EINVAL if the value of &drm_pvr_ioctl_create_bo_args.size is zero
* or wider than &typedef size_t,
* * -%EINVAL if any bits in &drm_pvr_ioctl_create_bo_args.flags that are
* reserved or undefined are set,
* * -%EINVAL if any padding fields in &drm_pvr_ioctl_create_bo_args are not
* zero,
* * Any error encountered while creating the object (see
* pvr_gem_object_create()), or
* * Any error encountered while transferring ownership of the object into a
* userspace-accessible handle (see pvr_gem_object_into_handle()).
*/
static int
pvr_ioctl_create_bo(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_get_bo_mmap_offset() - IOCTL to generate a "fake" offset to be
* used when calling mmap() from userspace to map the given GEM buffer object
* @drm_dev: [IN] DRM device (unused).
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type * &struct drm_pvr_ioctl_get_bo_mmap_offset_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_GET_BO_MMAP_OFFSET.
*
* This IOCTL does *not* perform an mmap. See the docs on
* &struct drm_pvr_ioctl_get_bo_mmap_offset_args for details.
*
* Return:
* * 0 on success,
* * -%ENOENT if the handle does not reference a valid GEM buffer object,
* * -%EINVAL if any padding fields in &struct
* drm_pvr_ioctl_get_bo_mmap_offset_args are not zero, or
* * Any error returned by drm_gem_create_mmap_offset().
*/
static int
pvr_ioctl_get_bo_mmap_offset(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
static __always_inline u64
pvr_fw_version_packed(u32 major, u32 minor)
{
return ((u64)major << 32) | minor;
}
static u32
rogue_get_common_store_partition_space_size(struct pvr_device *pvr_dev)
{
u32 max_partitions = 0;
u32 tile_size_x = 0;
u32 tile_size_y = 0;
PVR_FEATURE_VALUE(pvr_dev, tile_size_x, &tile_size_x);
PVR_FEATURE_VALUE(pvr_dev, tile_size_y, &tile_size_y);
PVR_FEATURE_VALUE(pvr_dev, max_partitions, &max_partitions);
if (tile_size_x == 16 && tile_size_y == 16) {
u32 usc_min_output_registers_per_pix = 0;
PVR_FEATURE_VALUE(pvr_dev, usc_min_output_registers_per_pix,
&usc_min_output_registers_per_pix);
return tile_size_x * tile_size_y * max_partitions *
usc_min_output_registers_per_pix;
}
return max_partitions * 1024;
}
static u32
rogue_get_common_store_alloc_region_size(struct pvr_device *pvr_dev)
{
u32 common_store_size_in_dwords = 512 * 4 * 4;
u32 alloc_region_size;
PVR_FEATURE_VALUE(pvr_dev, common_store_size_in_dwords, &common_store_size_in_dwords);
alloc_region_size = common_store_size_in_dwords - (256U * 4U) -
rogue_get_common_store_partition_space_size(pvr_dev);
if (PVR_HAS_QUIRK(pvr_dev, 44079)) {
u32 common_store_split_point = (768U * 4U * 4U);
return min(common_store_split_point - (256U * 4U), alloc_region_size);
}
return alloc_region_size;}
static inline u32
rogue_get_num_phantoms(struct pvr_device *pvr_dev)
{
u32 num_clusters = 1;
PVR_FEATURE_VALUE(pvr_dev, num_clusters, &num_clusters);
return ROGUE_REQ_NUM_PHANTOMS(num_clusters);
}
static inline u32
rogue_get_max_coeffs(struct pvr_device *pvr_dev)
{
u32 max_coeff_additional_portion = ROGUE_MAX_VERTEX_SHARED_REGISTERS;
u32 pending_allocation_shared_regs = 2U * 1024U;
u32 pending_allocation_coeff_regs = 0U;
u32 num_phantoms = rogue_get_num_phantoms(pvr_dev);
u32 tiles_in_flight = 0;
u32 max_coeff_pixel_portion;
PVR_FEATURE_VALUE(pvr_dev, isp_max_tiles_in_flight, &tiles_in_flight);
max_coeff_pixel_portion = DIV_ROUND_UP(tiles_in_flight, num_phantoms);
max_coeff_pixel_portion *= ROGUE_MAX_PIXEL_SHARED_REGISTERS;
/*
* Compute tasks on cores with BRN48492 and without compute overlap may lock
* up without two additional lines of coeffs.
*/
if (PVR_HAS_QUIRK(pvr_dev, 48492) && !PVR_HAS_FEATURE(pvr_dev, compute_overlap))
pending_allocation_coeff_regs = 2U * 1024U;
if (PVR_HAS_ENHANCEMENT(pvr_dev, 38748))
pending_allocation_shared_regs = 0;
if (PVR_HAS_ENHANCEMENT(pvr_dev, 38020))
max_coeff_additional_portion += ROGUE_MAX_COMPUTE_SHARED_REGISTERS;
return rogue_get_common_store_alloc_region_size(pvr_dev) + pending_allocation_coeff_regs -
(max_coeff_pixel_portion + max_coeff_additional_portion +
pending_allocation_shared_regs);
}
static inline u32
rogue_get_cdm_max_local_mem_size_regs(struct pvr_device *pvr_dev)
{
u32 available_coeffs_in_dwords = rogue_get_max_coeffs(pvr_dev);
if (PVR_HAS_QUIRK(pvr_dev, 48492) && PVR_HAS_FEATURE(pvr_dev, roguexe) &&
!PVR_HAS_FEATURE(pvr_dev, compute_overlap)) {
/* Driver must not use the 2 reserved lines. */
available_coeffs_in_dwords -= ROGUE_CSRM_LINE_SIZE_IN_DWORDS * 2;
}
/*
* The maximum amount of local memory available to a kernel is the minimum
* of the total number of coefficient registers available and the max common
* store allocation size which can be made by the CDM.
*
* If any coeff lines are reserved for tessellation or pixel then we need to
* subtract those too.
*/
return min(available_coeffs_in_dwords, (u32)ROGUE_MAX_PER_KERNEL_LOCAL_MEM_SIZE_REGS);
}
/**
* pvr_dev_query_gpu_info_get()
* @pvr_dev: Device pointer.
* @args: [IN] Device query arguments containing a pointer to a userspace * struct drm_pvr_dev_query_gpu_info.
*
* If the query object pointer is NULL, the size field is updated with the
* expected size of the query object.
*
* Returns:
* * 0 on success, or if size is requested using a NULL pointer, or
* * -%E2BIG if the indicated length of the allocation is less than is
* required to contain the copied data, or
* * -%EFAULT if local memory could not be copied to userspace.
*/
static int
pvr_dev_query_gpu_info_get(struct pvr_device *pvr_dev,
struct drm_pvr_ioctl_dev_query_args *args)
{
struct drm_pvr_dev_query_gpu_info gpu_info = {0};
int err;
if (!args->pointer) {
args->size = sizeof(struct drm_pvr_dev_query_gpu_info);
return 0;
}
gpu_info.gpu_id =
pvr_gpu_id_to_packed_bvnc(&pvr_dev->gpu_id);
gpu_info.num_phantoms = rogue_get_num_phantoms(pvr_dev);
err = PVR_UOBJ_SET(args->pointer, args->size, gpu_info);
if (err < 0)
return err;
if (args->size > sizeof(gpu_info))
args->size = sizeof(gpu_info);
return 0;
}
/**
* pvr_dev_query_runtime_info_get()
* @pvr_dev: Device pointer.
* @args: [IN] Device query arguments containing a pointer to a userspace
* struct drm_pvr_dev_query_runtime_info.
*
* If the query object pointer is NULL, the size field is updated with the
* expected size of the query object.
*
* Returns:
* * 0 on success, or if size is requested using a NULL pointer, or
* * -%E2BIG if the indicated length of the allocation is less than is
* required to contain the copied data, or
* * -%EFAULT if local memory could not be copied to userspace.
*/
static int
pvr_dev_query_runtime_info_get(struct pvr_device *pvr_dev,
struct drm_pvr_ioctl_dev_query_args *args)
{
struct drm_pvr_dev_query_runtime_info runtime_info = {0};
int err;
if (!args->pointer) {
args->size = sizeof(struct drm_pvr_dev_query_runtime_info);
return 0;
}
runtime_info.free_list_min_pages = 0; /* FIXME */
runtime_info.free_list_max_pages =
ROGUE_PM_MAX_FREELIST_SIZE / ROGUE_PM_PAGE_SIZE;
runtime_info.common_store_alloc_region_size =
rogue_get_common_store_alloc_region_size(pvr_dev);
runtime_info.common_store_partition_space_size =
rogue_get_common_store_partition_space_size(pvr_dev); runtime_info.max_coeffs = rogue_get_max_coeffs(pvr_dev);
runtime_info.cdm_max_local_mem_size_regs =
rogue_get_cdm_max_local_mem_size_regs(pvr_dev);
err = PVR_UOBJ_SET(args->pointer, args->size, runtime_info);
if (err < 0)
return err;
if (args->size > sizeof(runtime_info))
args->size = sizeof(runtime_info);
return 0;
}
/**
* pvr_dev_query_quirks_get() - Unpack array of quirks at the address given
* in a struct drm_pvr_dev_query_quirks, or gets the amount of space required
* for it.
* @pvr_dev: Device pointer.
* @args: [IN] Device query arguments containing a pointer to a userspace
* struct drm_pvr_dev_query_query_quirks.
*
* If the query object pointer is NULL, the size field is updated with the
* expected size of the query object.
* If the userspace pointer in the query object is NULL, or the count is
* short, no data is copied.
* The count field will be updated to that copied, or if either pointer is
* NULL, that which would have been copied.
* The size field in the query object will be updated to the size copied.
*
* Returns:
* * 0 on success, or if size/count is requested using a NULL pointer, or
* * -%EINVAL if args contained non-zero reserved fields, or
* * -%E2BIG if the indicated length of the allocation is less than is
* required to contain the copied data, or
* * -%EFAULT if local memory could not be copied to userspace.
*/
static int
pvr_dev_query_quirks_get(struct pvr_device *pvr_dev,
struct drm_pvr_ioctl_dev_query_args *args)
{
/*
* @FIXME - hardcoding of numbers here is intended as an
* intermediate step so the UAPI can be fixed, but requires a
* a refactor in the future to store them in a more appropriate
* location
*/
static const u32 umd_quirks_musthave[] = {
47217,
49927,
62269,
};
static const u32 umd_quirks[] = {
48545,
51764,
};
struct drm_pvr_dev_query_quirks query;
u32 out[ARRAY_SIZE(umd_quirks_musthave) + ARRAY_SIZE(umd_quirks)];
size_t out_musthave_count = 0;
size_t out_count = 0;
int err;
if (!args->pointer) {
args->size = sizeof(struct drm_pvr_dev_query_quirks);
return 0;
}
err = PVR_UOBJ_GET(query, args->size, args->pointer);
if (err < 0)
return err; if (query._padding_c)
return -EINVAL;
for (int i = 0; i < ARRAY_SIZE(umd_quirks_musthave); i++) {
if (pvr_device_has_uapi_quirk(pvr_dev, umd_quirks_musthave[i])) {
out[out_count++] = umd_quirks_musthave[i];
out_musthave_count++;
}
}
for (int i = 0; i < ARRAY_SIZE(umd_quirks); i++) {
if (pvr_device_has_uapi_quirk(pvr_dev, umd_quirks[i]))
out[out_count++] = umd_quirks[i];
}
if (!query.quirks)
goto copy_out;
if (query.count < out_count)
return -E2BIG;
if (copy_to_user(u64_to_user_ptr(query.quirks), out,
out_count * sizeof(u32))) {
return -EFAULT;
}
query.musthave_count = out_musthave_count;
copy_out:
query.count = out_count;
err = PVR_UOBJ_SET(args->pointer, args->size, query);
if (err < 0)
return err;
args->size = sizeof(query);
return 0;
}
/**
* pvr_dev_query_enhancements_get() - Unpack array of enhancements at the
* address given in a struct drm_pvr_dev_query_enhancements, or gets the amount
* of space required for it.
* @pvr_dev: Device pointer.
* @args: [IN] Device query arguments containing a pointer to a userspace
* struct drm_pvr_dev_query_enhancements.
*
* If the query object pointer is NULL, the size field is updated with the
* expected size of the query object.
* If the userspace pointer in the query object is NULL, or the count is
* short, no data is copied.
* The count field will be updated to that copied, or if either pointer is
* NULL, that which would have been copied.
* The size field in the query object will be updated to the size copied.
*
* Returns:
* * 0 on success, or if size/count is requested using a NULL pointer, or
* * -%EINVAL if args contained non-zero reserved fields, or
* * -%E2BIG if the indicated length of the allocation is less than is
* required to contain the copied data, or
* * -%EFAULT if local memory could not be copied to userspace.
*/
static int
pvr_dev_query_enhancements_get(struct pvr_device *pvr_dev,
struct drm_pvr_ioctl_dev_query_args *args)
{
/*
* @FIXME - hardcoding of numbers here is intended as an
* intermediate step so the UAPI can be fixed, but requires a
* a refactor in the future to store them in a more appropriate
* location
*/ const u32 umd_enhancements[] = {
35421,
42064,
};
struct drm_pvr_dev_query_enhancements query;
u32 out[ARRAY_SIZE(umd_enhancements)];
size_t out_idx = 0;
int err;
if (!args->pointer) {
args->size = sizeof(struct drm_pvr_dev_query_enhancements);
return 0;
}
err = PVR_UOBJ_GET(query, args->size, args->pointer);
if (err < 0)
return err;
if (query._padding_a)
return -EINVAL;
if (query._padding_c)
return -EINVAL;
for (int i = 0; i < ARRAY_SIZE(umd_enhancements); i++) {
if (pvr_device_has_uapi_enhancement(pvr_dev, umd_enhancements[i]))
out[out_idx++] = umd_enhancements[i];
}
if (!query.enhancements)
goto copy_out;
if (query.count < out_idx)
return -E2BIG;
if (copy_to_user(u64_to_user_ptr(query.enhancements), out,
out_idx * sizeof(u32))) {
return -EFAULT;
}
copy_out:
query.count = out_idx;
err = PVR_UOBJ_SET(args->pointer, args->size, query);
if (err < 0)
return err;
args->size = sizeof(query);
return 0;
}
/**
* pvr_ioctl_dev_query() - IOCTL to copy information about a device
* @drm_dev: [IN] DRM device.
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_dev_query_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_DEV_QUERY.
* If the given receiving struct pointer is NULL, or the indicated size is too
* small, the expected size of the struct type will be returned in the size
* argument field.
*
* Return:
* * 0 on success or when fetching the size with args->pointer == NULL, or
* * -%E2BIG if the indicated size of the receiving struct is less than is
* required to contain the copied data, or
* * -%EINVAL if the indicated struct type is unknown, or
* * -%ENOMEM if local memory could not be allocated, or
* * -%EFAULT if local memory could not be copied to userspace.
*/
static int
pvr_ioctl_dev_query(struct drm_device *drm_dev, void *raw_args, struct drm_file *file)
{
struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
struct drm_pvr_ioctl_dev_query_args *args = raw_args;
int idx;
int ret = -EINVAL;
if (!drm_dev_enter(drm_dev, &idx))
return -EIO;
switch ((enum drm_pvr_dev_query)args->type) {
case DRM_PVR_DEV_QUERY_GPU_INFO_GET:
ret = pvr_dev_query_gpu_info_get(pvr_dev, args);
break;
case DRM_PVR_DEV_QUERY_RUNTIME_INFO_GET:
ret = pvr_dev_query_runtime_info_get(pvr_dev, args);
break;
case DRM_PVR_DEV_QUERY_QUIRKS_GET:
ret = pvr_dev_query_quirks_get(pvr_dev, args);
break;
case DRM_PVR_DEV_QUERY_ENHANCEMENTS_GET:
ret = pvr_dev_query_enhancements_get(pvr_dev, args);
break;
case DRM_PVR_DEV_QUERY_HEAP_INFO_GET:
return -EINVAL;
case DRM_PVR_DEV_QUERY_STATIC_DATA_AREAS_GET:
return -EINVAL;
}
drm_dev_exit(idx);
return ret;
}
/**
* pvr_ioctl_create_context() - IOCTL to create a context
* @drm_dev: [IN] DRM device.
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_create_context_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_CREATE_CONTEXT.
*
* Return:
* * 0 on success, or
* * -%EINVAL if provided arguments are invalid, or
* * -%EFAULT if arguments can't be copied from userspace, or
* * Any error returned by pvr_create_render_context().
*/
static int
pvr_ioctl_create_context(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_destroy_context() - IOCTL to destroy a context
* @drm_dev: [IN] DRM device.
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_destroy_context_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_DESTROY_CONTEXT.
* * Return:
* * 0 on success, or
* * -%EINVAL if context not in context list.
*/
static int
pvr_ioctl_destroy_context(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_create_free_list() - IOCTL to create a free list
* @drm_dev: [IN] DRM device.
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_create_free_list_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_CREATE_FREE_LIST.
*
* Return:
* * 0 on success, or
* * Any error returned by pvr_free_list_create().
*/
static int
pvr_ioctl_create_free_list(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_destroy_free_list() - IOCTL to destroy a free list
* @drm_dev: [IN] DRM device.
* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_destroy_free_list_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_DESTROY_FREE_LIST.
*
* Return:
* * 0 on success, or
* * -%EINVAL if free list not in object list.
*/
static int
pvr_ioctl_destroy_free_list(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_create_hwrt_dataset() - IOCTL to create a HWRT dataset
* @drm_dev: [IN] DRM device.
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_create_hwrt_dataset_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_CREATE_HWRT_DATASET.
*
* Return:
* * 0 on success, or
* * Any error returned by pvr_hwrt_dataset_create().
*/
static int
pvr_ioctl_create_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_destroy_hwrt_dataset() - IOCTL to destroy a HWRT dataset
* @drm_dev: [IN] DRM device.
* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_destroy_hwrt_dataset_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_DESTROY_HWRT_DATASET.
*
* Return:
* * 0 on success, or
* * -%EINVAL if HWRT dataset not in object list.
*/
static int
pvr_ioctl_destroy_hwrt_dataset(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_create_vm_context() - IOCTL to create a VM context
* @drm_dev: [IN] DRM device.
* @raw_args: [IN/OUT] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_create_vm_context_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_CREATE_VM_CONTEXT.
*
* Return:
* * 0 on success, or
* * Any error returned by pvr_vm_create_context().
*/
static int
pvr_ioctl_create_vm_context(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_destroy_vm_context() - IOCTL to destroy a VM context
* @drm_dev: [IN] DRM device.
* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_destroy_vm_context_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_DESTROY_VM_CONTEXT.
*
* Return:
* * 0 on success, or
* * -%EINVAL if object not in object list.
*/
static int
pvr_ioctl_destroy_vm_context(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_vm_map() - IOCTL to map buffer to GPU address space.
* @drm_dev: [IN] DRM device.
* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_vm_map_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_VM_MAP.
* * Return:
* * 0 on success,
* * -%EINVAL if &drm_pvr_ioctl_vm_op_map_args.flags is not zero,
* * -%EINVAL if the bounds specified by &drm_pvr_ioctl_vm_op_map_args.offset
* and &drm_pvr_ioctl_vm_op_map_args.size are not valid or do not fall
* within the buffer object specified by
* &drm_pvr_ioctl_vm_op_map_args.handle,
* * -%EINVAL if the bounds specified by
* &drm_pvr_ioctl_vm_op_map_args.device_addr and
* &drm_pvr_ioctl_vm_op_map_args.size do not form a valid device-virtual
* address range which falls entirely within a single heap, or
* * -%ENOENT if &drm_pvr_ioctl_vm_op_map_args.handle does not refer to a
* valid PowerVR buffer object.
*/
static int
pvr_ioctl_vm_map(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/**
* pvr_ioctl_vm_unmap() - IOCTL to unmap buffer from GPU address space.
* @drm_dev: [IN] DRM device.
* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_vm_unmap_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_VM_UNMAP.
*
* Return:
* * 0 on success,
* * -%EINVAL if &drm_pvr_ioctl_vm_op_unmap_args.device_addr is not a valid
* device page-aligned device-virtual address, or
* * -%ENOENT if there is currently no PowerVR buffer object mapped at
* &drm_pvr_ioctl_vm_op_unmap_args.device_addr.
*/
static int
pvr_ioctl_vm_unmap(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
/*
* pvr_ioctl_submit_job() - IOCTL to submit a job to the GPU
* @drm_dev: [IN] DRM device.
* @raw_args: [IN] Arguments passed to this IOCTL. This must be of type
* &struct drm_pvr_ioctl_submit_job_args.
* @file: [IN] DRM file private data.
*
* Called from userspace with %DRM_IOCTL_PVR_SUBMIT_JOB.
*
* Return:
* * 0 on success, or
* * -%EINVAL if arguments are invalid.
*/
static int
pvr_ioctl_submit_jobs(struct drm_device *drm_dev, void *raw_args,
struct drm_file *file)
{
return -ENOTTY;
}
int
pvr_get_uobj(u64 usr_ptr, u32 usr_stride, u32 min_stride, u32 obj_size, void *out)
{
if (usr_stride < min_stride)
return -EINVAL;
return copy_struct_from_user(out, obj_size, u64_to_user_ptr(usr_ptr), usr_stride);
}
int
pvr_set_uobj(u64 usr_ptr, u32 usr_stride, u32 min_stride, u32 obj_size, const void *in)
{
if (usr_stride < min_stride)
return -EINVAL;
if (copy_to_user(u64_to_user_ptr(usr_ptr), in, min_t(u32, usr_stride, obj_size)))
return -EFAULT;
if (usr_stride > obj_size &&
clear_user(u64_to_user_ptr(usr_ptr + obj_size), usr_stride - obj_size)) {
return -EFAULT;
}
return 0;
}
int
pvr_get_uobj_array(const struct drm_pvr_obj_array *in, u32 min_stride, u32 obj_size, void **out)
{
int ret = 0;
void *out_alloc;
if (in->stride < min_stride)
return -EINVAL;
if (!in->count)
return 0;
out_alloc = kvmalloc_array(in->count, obj_size, GFP_KERNEL);
if (!out_alloc)
return -ENOMEM;
if (obj_size == in->stride) {
if (copy_from_user(out_alloc, u64_to_user_ptr(in->array),
(unsigned long)obj_size * in->count))
ret = -EFAULT;
} else {
void __user *in_ptr = u64_to_user_ptr(in->array);
void *out_ptr = out_alloc;
for (u32 i = 0; i < in->count; i++) {
ret = copy_struct_from_user(out_ptr, obj_size, in_ptr, in->stride);
if (ret)
break;
out_ptr += obj_size;
in_ptr += in->stride;
}
}
if (ret) {
kvfree(out_alloc);
return ret;
}
*out = out_alloc;
return 0;
}
int
pvr_set_uobj_array(const struct drm_pvr_obj_array *out, u32 min_stride, u32 obj_size,
const void *in)
{
if (out->stride < min_stride)
return -EINVAL;
if (!out->count)
return 0;
if (obj_size == out->stride) {
if (copy_to_user(u64_to_user_ptr(out->array), in,
(unsigned long)obj_size * out->count))
return -EFAULT;
} else {
u32 cpy_elem_size = min_t(u32, out->stride, obj_size);
void __user *out_ptr = u64_to_user_ptr(out->array);
const void *in_ptr = in;
for (u32 i = 0; i < out->count; i++) {
if (copy_to_user(out_ptr, in_ptr, cpy_elem_size))
return -EFAULT;
out_ptr += obj_size;
in_ptr += out->stride;
}
if (out->stride > obj_size &&
clear_user(u64_to_user_ptr(out->array + obj_size),
out->stride - obj_size)) {
return -EFAULT;
}
}
return 0;
}
#define DRM_PVR_IOCTL(_name, _func, _flags) \
DRM_IOCTL_DEF_DRV(PVR_##_name, pvr_ioctl_##_func, _flags)
/* clang-format off */
static const struct drm_ioctl_desc pvr_drm_driver_ioctls[] = {
DRM_PVR_IOCTL(DEV_QUERY, dev_query, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(CREATE_BO, create_bo, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(GET_BO_MMAP_OFFSET, get_bo_mmap_offset, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(CREATE_VM_CONTEXT, create_vm_context, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(DESTROY_VM_CONTEXT, destroy_vm_context, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(VM_MAP, vm_map, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(VM_UNMAP, vm_unmap, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(CREATE_CONTEXT, create_context, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(DESTROY_CONTEXT, destroy_context, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(CREATE_FREE_LIST, create_free_list, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(DESTROY_FREE_LIST, destroy_free_list, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(CREATE_HWRT_DATASET, create_hwrt_dataset, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(DESTROY_HWRT_DATASET, destroy_hwrt_dataset, DRM_RENDER_ALLOW),
DRM_PVR_IOCTL(SUBMIT_JOBS, submit_jobs, DRM_RENDER_ALLOW),
};
/* clang-format on */
#undef DRM_PVR_IOCTL
/**
* pvr_drm_driver_open() - Driver callback when a new &struct drm_file is opened
* @drm_dev: [IN] DRM device.
* @file: [IN] DRM file private data.
*
* Allocates powervr-specific file private data (&struct pvr_file).
*
* Registered in &pvr_drm_driver.
*
* Return:
* * 0 on success,
* * -%ENOMEM if the allocation of a &struct ipvr_file fails, or
* * Any error returned by pvr_memory_context_init().
*/static int
pvr_drm_driver_open(struct drm_device *drm_dev, struct drm_file *file)
{
struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
struct pvr_file *pvr_file;
pvr_file = kzalloc(sizeof(*pvr_file), GFP_KERNEL);
if (!pvr_file)
return -ENOMEM;
/*
* Store reference to base DRM file private data for use by
* from_pvr_file.
*/
pvr_file->file = file;
/*
* Store reference to powervr-specific outer device struct in file
* private data for convenient access.
*/
pvr_file->pvr_dev = pvr_dev;
/*
* Store reference to powervr-specific file private data in DRM file
* private data.
*/
file->driver_priv = pvr_file;
return 0;
}
/**
* pvr_drm_driver_postclose() - One of the driver callbacks when a &struct
* drm_file is closed.
* @drm_dev: [IN] DRM device (unused).
* @file: [IN] DRM file private data.
*
* Frees powervr-specific file private data (&struct pvr_file).
*
* Registered in &pvr_drm_driver.
*/
static void
pvr_drm_driver_postclose(__always_unused struct drm_device *drm_dev,
struct drm_file *file)
{
struct pvr_file *pvr_file = to_pvr_file(file);
kfree(pvr_file);
file->driver_priv = NULL;
}
DEFINE_DRM_GEM_FOPS(pvr_drm_driver_fops);
static struct drm_driver pvr_drm_driver = {
.driver_features = DRIVER_RENDER,
.open = pvr_drm_driver_open,
.postclose = pvr_drm_driver_postclose,
.ioctls = pvr_drm_driver_ioctls,
.num_ioctls = ARRAY_SIZE(pvr_drm_driver_ioctls),
.fops = &pvr_drm_driver_fops,
.name = PVR_DRIVER_NAME,
.desc = PVR_DRIVER_DESC,
.date = PVR_DRIVER_DATE,
.major = PVR_DRIVER_MAJOR,
.minor = PVR_DRIVER_MINOR,
.patchlevel = PVR_DRIVER_PATCHLEVEL,
};
static int
pvr_probe(struct platform_device *plat_dev)
{
struct pvr_device *pvr_dev;
struct drm_device *drm_dev;
int err;
pvr_dev = devm_drm_dev_alloc(&plat_dev->dev, &pvr_drm_driver,
struct pvr_device, base);
if (IS_ERR(pvr_dev))
return PTR_ERR(pvr_dev);
drm_dev = &pvr_dev->base;
platform_set_drvdata(plat_dev, drm_dev);
err = pvr_device_init(pvr_dev);
if (err)
return err;
err = drm_dev_register(drm_dev, 0);
if (err)
goto err_device_fini;
return 0;
err_device_fini:
pvr_device_fini(pvr_dev);
return err;
}
static int
pvr_remove(struct platform_device *plat_dev)
{
struct drm_device *drm_dev = platform_get_drvdata(plat_dev);
struct pvr_device *pvr_dev = to_pvr_device(drm_dev);
pvr_device_fini(pvr_dev);
drm_dev_unplug(drm_dev);
return 0;
}
static const struct of_device_id dt_match[] = {
{ .compatible = "img,img-axe", .data = NULL },
{}
};
MODULE_DEVICE_TABLE(of, dt_match);
static struct platform_driver pvr_driver = {
.probe = pvr_probe,
.remove = pvr_remove,
.driver = {
.name = PVR_DRIVER_NAME,
.of_match_table = dt_match,
},
};
module_platform_driver(pvr_driver);
MODULE_AUTHOR("Imagination Technologies Ltd.");
MODULE_DESCRIPTION(PVR_DRIVER_DESC);
MODULE_LICENSE("Dual MIT/GPL");
MODULE_IMPORT_NS(DMA_BUF);