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/*
* © Copyright 2018 Alyssa Rosenzweig
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <panfrost-misc.h>
#include <panfrost-job.h>
#include "pan_context.h"
/* TODO: What does this actually have to be? */
#define ALIGNMENT 128
/* Allocate a mapped chunk directly from a heap */
struct panfrost_transfer
panfrost_allocate_chunk(struct panfrost_context *ctx, size_t size, unsigned heap_id)
{
size = ALIGN(size, ALIGNMENT);
struct pipe_context *gallium = (struct pipe_context *) ctx;
struct panfrost_screen *screen = panfrost_screen(gallium->screen);
struct pb_slab_entry *entry = pb_slab_alloc(&screen->slabs, size, heap_id);
struct panfrost_memory_entry *p_entry = (struct panfrost_memory_entry *) entry;
struct panfrost_memory *backing = (struct panfrost_memory *) entry->slab;
struct panfrost_transfer transfer = {
.cpu = backing->cpu + p_entry->offset,
.gpu = backing->gpu + p_entry->offset
};
return transfer;
}
/* Transient command stream pooling: command stream uploads try to simply copy
* into whereever we left off. If there isn't space, we allocate a new entry
* into the pool and copy there */
struct panfrost_transfer
panfrost_allocate_transient(struct panfrost_context *ctx, size_t sz)
{
/* Pad the size */
sz = ALIGN(sz, ALIGNMENT);
/* Check if there is room in the current entry */
struct panfrost_transient_pool *pool = &ctx->transient_pools[ctx->cmdstream_i];
if ((pool->entry_offset + sz) > pool->entry_size) {
/* Don't overflow this entry -- advance to the next */
pool->entry_offset = 0;
pool->entry_index++;
assert(pool->entry_index < PANFROST_MAX_TRANSIENT_ENTRIES);
/* Check if this entry exists */
if (pool->entry_index >= pool->entry_count) {
/* Don't overflow the pool -- allocate a new one */
struct pipe_context *gallium = (struct pipe_context *) ctx;
struct panfrost_screen *screen = panfrost_screen(gallium->screen);
struct pb_slab_entry *entry = pb_slab_alloc(&screen->slabs, pool->entry_size, HEAP_TRANSIENT);
pool->entry_count++;
pool->entries[pool->entry_index] = (struct panfrost_memory_entry *) entry;
}
/* Make sure we -still- won't overflow */
assert(sz < pool->entry_size);
}
/* We have an entry we can write to, so do the upload! */
struct panfrost_memory_entry *p_entry = pool->entries[pool->entry_index];
struct panfrost_memory *backing = (struct panfrost_memory *) p_entry->base.slab;
struct panfrost_transfer ret = {
.cpu = backing->cpu + p_entry->offset + pool->entry_offset,
.gpu = backing->gpu + p_entry->offset + pool->entry_offset
};
/* Advance the pointer */
pool->entry_offset += sz;
return ret;
}
mali_ptr
panfrost_upload_transient(struct panfrost_context *ctx, const void *data, size_t sz)
{
struct panfrost_transfer transfer = panfrost_allocate_transient(ctx, sz);
memcpy(transfer.cpu, data, sz);
return transfer.gpu;
}
// TODO: An actual allocator, perhaps
// TODO: Multiple stacks for multiple bases?
int hack_stack_bottom = 4096; /* Don't interfere with constant offsets */
int last_offset = 0;
static inline int
pandev_allocate_offset(int *stack, size_t sz)
{
/* First, align the stack bottom to something nice; it's not critical
* at this point if we waste a little space to do so. */
int excess = *stack & (ALIGNMENT - 1);
/* Add the secret of my */
if (excess)
*stack += ALIGNMENT - excess;
/* Finally, use the new bottom for the allocation and move down the
* stack */
int ret = *stack;
*stack += sz;
return ret;
}
inline mali_ptr
pandev_upload(int cheating_offset, int *stack_bottom, mali_ptr base, void *base_map, const void *data, size_t sz, bool no_pad)
{
int offset;
/* We're not positive about the sizes of all objects, but we don't want
* them to crash against each other either. Let the caller disable
* padding if they so choose, though. */
size_t padded_size = no_pad ? sz : sz * 2;
/* If no specific bottom is specified, use a global one... don't do
* this in production, kids */
if (!stack_bottom)
stack_bottom = &hack_stack_bottom;
/* Allocate space for the new GPU object, if required */
if (cheating_offset == -1) {
offset = pandev_allocate_offset(stack_bottom, padded_size);
} else {
offset = cheating_offset;
*stack_bottom = offset + sz;
}
/* Save last offset for sequential uploads (job descriptors) */
last_offset = offset + padded_size;
/* Upload it */
memcpy((uint8_t *) base_map + offset, data, sz);
/* Return the GPU address */
return base + offset;
}
/* Upload immediately after the last allocation */
mali_ptr
pandev_upload_sequential(mali_ptr base, void *base_map, const void *data, size_t sz)
{
return pandev_upload(last_offset, NULL, base, base_map, data, sz, /* false */ true);
}
/* Simplified APIs for the real driver, rather than replays */
mali_ptr
panfrost_upload(struct panfrost_memory *mem, const void *data, size_t sz, bool no_pad)
{
/* Bounds check */
if ((mem->stack_bottom + sz) >= mem->size) {
printf("Out of memory, tried to upload %zd but only %zd available\n", sz, mem->size - mem->stack_bottom);
assert(0);
}
return pandev_upload(-1, &mem->stack_bottom, mem->gpu, mem->cpu, data, sz, no_pad);
}
mali_ptr
panfrost_upload_sequential(struct panfrost_memory *mem, const void *data, size_t sz)
{
return pandev_upload(last_offset, &mem->stack_bottom, mem->gpu, mem->cpu, data, sz, true);
}
/* Simplified interface to allocate a chunk without any upload, to allow
* zero-copy uploads. This is particularly useful when the copy would happen
* anyway, for instance with texture swizzling. */
void *
panfrost_allocate_transfer(struct panfrost_memory *mem, size_t sz, mali_ptr *gpu)
{
int offset = pandev_allocate_offset(&mem->stack_bottom, sz);
*gpu = mem->gpu + offset;
return mem->cpu + offset;
}
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