// SPDX-License-Identifier: GPL-2.0-only OR MIT
/* Copyright (c) 2023 Imagination Technologies Ltd. */
#include "pvr_device.h"
#include "pvr_rogue_fwif_stream.h"
#include "pvr_stream.h"
#include <linux/align.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <uapi/drm/pvr_drm.h>
static __always_inline bool
stream_def_is_supported(struct pvr_device *pvr_dev, const struct pvr_stream_def *stream_def)
{
if (stream_def->feature == PVR_FEATURE_NONE)
return true;
if (!(stream_def->feature & PVR_FEATURE_NOT) &&
pvr_device_has_feature(pvr_dev, stream_def->feature)) {
return true;
}
if ((stream_def->feature & PVR_FEATURE_NOT) &&
!pvr_device_has_feature(pvr_dev, stream_def->feature & ~PVR_FEATURE_NOT)) {
return true;
}
return false;
}
static int
pvr_stream_get_data(u8 *stream, u32 *stream_offset, u32 stream_size, u32 data_size, u32 align_size,
void *dest)
{
*stream_offset = ALIGN(*stream_offset, align_size);
if ((*stream_offset + data_size) > stream_size)
return -EINVAL;
memcpy(dest, stream + *stream_offset, data_size);
(*stream_offset) += data_size;
return 0;
}
/**
* pvr_stream_process_1() - Process a single stream and fill destination structure
* @pvr_dev: Device pointer.
* @stream_def: Stream definition.
* @nr_entries: Number of entries in &stream_def.
* @stream: Pointer to stream.
* @stream_offset: Starting offset within stream.
* @stream_size: Size of input stream, in bytes.
* @dest: Pointer to destination structure.
* @dest_size: Size of destination structure.
* @stream_offset_out: Pointer to variable to write updated stream offset to. May be NULL.
*
* Returns:
* * 0 on success, or
* * -%EINVAL on malformed stream.
*/
static int
pvr_stream_process_1(struct pvr_device *pvr_dev, const struct pvr_stream_def *stream_def,
u32 nr_entries, u8 *stream, u32 stream_offset, u32 stream_size,
u8 *dest, u32 dest_size, u32 *stream_offset_out)
{
int err = 0;
u32 i;
for (i = 0; i < nr_entries; i++) {
if (stream_def[i].offset >= dest_size) {
err = -EINVAL;
break;
}
if (!stream_def_is_supported(pvr_dev, &stream_def[i]))
continue;
switch (stream_def[i].size) {
case PVR_STREAM_SIZE_8:
err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u8),
sizeof(u8), dest + stream_def[i].offset);
if (err)
return err;
break;
case PVR_STREAM_SIZE_16:
err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u16),
sizeof(u16), dest + stream_def[i].offset);
if (err)
return err;
break;
case PVR_STREAM_SIZE_32:
err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32),
sizeof(u32), dest + stream_def[i].offset);
if (err)
return err;
break;
case PVR_STREAM_SIZE_64:
err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u64),
sizeof(u64), dest + stream_def[i].offset);
if (err)
return err;
break;
case PVR_STREAM_SIZE_ARRAY:
err = pvr_stream_get_data(stream, &stream_offset, stream_size,
stream_def[i].array_size, sizeof(u64),
dest + stream_def[i].offset);
if (err)
return err;
break;
}
}
if (stream_offset_out)
*stream_offset_out = stream_offset;
return err;
}
static int
pvr_stream_process_ext_stream(struct pvr_device *pvr_dev,
const struct pvr_stream_cmd_defs *cmd_defs, void *ext_stream,
u32 stream_offset, u32 ext_stream_size, void *dest)
{
u32 musthave_masks[PVR_STREAM_EXTHDR_TYPE_MAX];
u32 ext_header;
int err = 0;
u32 i;
/* Copy "must have" mask from device. We clear this as we process the stream. */
memcpy(musthave_masks, pvr_dev->stream_musthave_quirks[cmd_defs->type],
sizeof(musthave_masks));
do {
const struct pvr_stream_ext_header *header;
u32 type;
u32 data;
err = pvr_stream_get_data(ext_stream, &stream_offset, ext_stream_size, sizeof(u32),
sizeof(ext_header), &ext_header);
if (err)
return err;
type = (ext_header & PVR_STREAM_EXTHDR_TYPE_MASK) >> PVR_STREAM_EXTHDR_TYPE_SHIFT;
data = ext_header & PVR_STREAM_EXTHDR_DATA_MASK;
if (type >= cmd_defs->ext_nr_headers)
return -EINVAL;
header = &cmd_defs->ext_headers[type];
if (data & ~header->valid_mask)
return -EINVAL;
musthave_masks[type] &= ~data;
for (i = 0; i < header->ext_streams_num; i++) {
const struct pvr_stream_ext_def *ext_def = &header->ext_streams[i];
if (!(ext_header & ext_def->header_mask))
continue;
if (!pvr_device_has_uapi_quirk(pvr_dev, ext_def->quirk))
return -EINVAL;
err = pvr_stream_process_1(pvr_dev, ext_def->stream, ext_def->stream_len,
ext_stream, stream_offset,
ext_stream_size, dest,
cmd_defs->dest_size, &stream_offset);
if (err)
return err;
}
} while (ext_header & PVR_STREAM_EXTHDR_CONTINUATION);
/*
* Verify that "must have" mask is now zero. If it isn't then one of the "must have" quirks
* for this command was not present.
*/
for (i = 0; i < cmd_defs->ext_nr_headers; i++) {
if (musthave_masks[i])
return -EINVAL;
}
return 0;
}
/**
* pvr_stream_process() - Build FW structure from stream
* @pvr_dev: Device pointer.
* @cmd_defs: Stream definition.
* @stream: Pointer to command stream.
* @stream_size: Size of command stream, in bytes.
* @dest_out: Pointer to destination buffer.
*
* Caller is responsible for freeing the output structure.
*
* Returns:
* * 0 on success,
* * -%ENOMEM on out of memory, or
* * -%EINVAL on malformed stream.
*/
int
pvr_stream_process(struct pvr_device *pvr_dev, const struct pvr_stream_cmd_defs *cmd_defs,
void *stream, u32 stream_size, void *dest_out)
{
u32 stream_offset = 0;
u32 main_stream_len;
u32 padding;
int err;
if (!stream || !stream_size)
return -EINVAL;
err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32),
sizeof(u32), &main_stream_len);
if (err)
return err;
/*
* u32 after stream length is padding to ensure u64 alignment, but may be used for expansion
* in the future. Verify it's zero.
*/
err = pvr_stream_get_data(stream, &stream_offset, stream_size, sizeof(u32),
sizeof(u32), &padding);
if (err)
return err;
if (main_stream_len < stream_offset || main_stream_len > stream_size || padding)
return -EINVAL;
err = pvr_stream_process_1(pvr_dev, cmd_defs->main_stream, cmd_defs->main_stream_len,
stream, stream_offset, main_stream_len, dest_out,
cmd_defs->dest_size, &stream_offset);
if (err)
return err;
if (stream_offset < stream_size) {
err = pvr_stream_process_ext_stream(pvr_dev, cmd_defs, stream, stream_offset,
stream_size, dest_out);
if (err)
return err;
} else {
u32 i;
/*
* If we don't have an extension stream then there must not be any "must have"
* quirks for this command.
*/
for (i = 0; i < cmd_defs->ext_nr_headers; i++) {
if (pvr_dev->stream_musthave_quirks[cmd_defs->type][i])
return -EINVAL;
}
}
return 0;
}
/**
* pvr_stream_create_musthave_masks() - Create "must have" masks for streams based on current device
* quirks
* @pvr_dev: Device pointer.
*/
void
pvr_stream_create_musthave_masks(struct pvr_device *pvr_dev)
{
memset(pvr_dev->stream_musthave_quirks, 0, sizeof(pvr_dev->stream_musthave_quirks));
if (pvr_device_has_uapi_quirk(pvr_dev, 47217))
pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_FRAG][0] |=
PVR_STREAM_EXTHDR_FRAG0_BRN47217;
if (pvr_device_has_uapi_quirk(pvr_dev, 49927)) {
pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_GEOM][0] |=
PVR_STREAM_EXTHDR_GEOM0_BRN49927;
pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_FRAG][0] |=
PVR_STREAM_EXTHDR_FRAG0_BRN49927;
pvr_dev->stream_musthave_quirks[PVR_STREAM_TYPE_COMPUTE][0] |=
PVR_STREAM_EXTHDR_COMPUTE0_BRN49927;
}
}
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