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drm/libdrm/radeon/radeon_cs_gem.c

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/*
* Copyright © 2008 Jérôme Glisse
* All Rights Reserved.
*
* 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, sub license, 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 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
* NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
* AND/OR ITS SUPPLIERS 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.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*/
/*
* Authors:
* Aapo Tahkola <aet@rasterburn.org>
* Nicolai Haehnle <prefect_@gmx.net>
* Jérôme Glisse <glisse@freedesktop.org>
*/
#include <errno.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include "radeon_cs.h"
#include "radeon_cs_gem.h"
#include "radeon_bo_gem.h"
#include "drm.h"
#include "xf86drm.h"
#include "radeon_drm.h"
#pragma pack(1)
struct cs_reloc_gem {
uint32_t handle;
uint32_t start_offset;
uint32_t end_offset;
uint32_t read_domain;
uint32_t write_domain;
uint32_t flags;
};
#pragma pack()
struct cs_gem {
struct radeon_cs base;
struct drm_radeon_cs2 cs;
struct drm_radeon_cs_chunk chunks[2];
unsigned nrelocs;
uint32_t *relocs;
struct radeon_bo **relocs_bo;
};
static struct radeon_cs *cs_gem_create(struct radeon_cs_manager *csm,
uint32_t ndw)
{
struct cs_gem *csg;
/* max cmd buffer size is 64Kb */
if (ndw > (64 * 1024 / 4)) {
return NULL;
}
csg = (struct cs_gem*)calloc(1, sizeof(struct cs_gem));
if (csg == NULL) {
return NULL;
}
csg->base.csm = csm;
csg->base.ndw = 64 * 1024 / 4;
csg->base.packets = (uint32_t*)calloc(1, 64 * 1024);
if (csg->base.packets == NULL) {
free(csg);
return NULL;
}
csg->base.relocs_total_size = 0;
csg->base.crelocs = 0;
csg->nrelocs = 4096 / (4 * 4) ;
csg->relocs_bo = (struct radeon_bo**)calloc(1,
csg->nrelocs*sizeof(void*));
if (csg->relocs_bo == NULL) {
free(csg->base.packets);
free(csg);
return NULL;
}
csg->base.relocs = csg->relocs = (uint32_t*)calloc(1, 4096);
if (csg->relocs == NULL) {
free(csg->relocs_bo);
free(csg->base.packets);
free(csg);
return NULL;
}
csg->chunks[0].chunk_id = RADEON_CHUNK_ID_IB;
csg->chunks[0].length_dw = 0;
csg->chunks[0].chunk_data = (uint64_t)(intptr_t)csg->base.packets;
csg->chunks[1].chunk_id = RADEON_CHUNK_ID_RELOCS;
csg->chunks[1].length_dw = 0;
csg->chunks[1].chunk_data = (uint64_t)(intptr_t)csg->relocs;
return (struct radeon_cs*)csg;
}
static int cs_gem_write_dword(struct radeon_cs *cs, uint32_t dword)
{
struct cs_gem *csg = (struct cs_gem*)cs;
if (cs->cdw >= cs->ndw) {
uint32_t tmp, *ptr;
tmp = (cs->cdw + 1 + 0x3FF) & (~0x3FF);
ptr = (uint32_t*)realloc(cs->packets, 4 * tmp);
if (ptr == NULL) {
return -ENOMEM;
}
cs->packets = ptr;
cs->ndw = tmp;
csg->chunks[0].chunk_data = (uint64_t)(intptr_t)csg->base.packets;
}
cs->packets[cs->cdw++] = dword;
csg->chunks[0].length_dw += 1;
return 0;
}
static int cs_gem_write_reloc(struct radeon_cs *cs,
struct radeon_bo *bo,
uint32_t start_offset,
uint32_t end_offset,
uint32_t read_domain,
uint32_t write_domain,
uint32_t flags)
{
struct cs_gem *csg = (struct cs_gem*)cs;
struct cs_reloc_gem *reloc;
uint32_t idx;
unsigned i;
/* check domains */
if ((read_domain && write_domain) || (!read_domain && !write_domain)) {
/* in one CS a bo can only be in read or write domain but not
* in read & write domain at the same sime
*/
return -EINVAL;
}
if (read_domain == RADEON_GEM_DOMAIN_CPU) {
return -EINVAL;
}
if (write_domain == RADEON_GEM_DOMAIN_CPU) {
return -EINVAL;
}
/* check reloc window */
if (end_offset > bo->size) {
return -EINVAL;
}
if (start_offset > end_offset) {
return -EINVAL;
}
/* check if bo is already referenced */
for(i = 0; i < cs->crelocs; i++) {
idx = i * 6;
reloc = (struct cs_reloc_gem*)&csg->relocs[idx];
if (reloc->handle == bo->handle) {
/* Check domains must be in read or write. As we check already
* checked that in argument one of the read or write domain was
* set we only need to check that if previous reloc as the read
* domain set then the read_domain should also be set for this
* new relocation.
*/
if (reloc->read_domain && !read_domain) {
return -EINVAL;
}
if (reloc->write_domain && !write_domain) {
return -EINVAL;
}
reloc->read_domain |= read_domain;
reloc->write_domain |= write_domain;
/* update start and end offset */
if (start_offset < reloc->start_offset) {
reloc->start_offset = start_offset;
}
if (end_offset > reloc->end_offset) {
reloc->end_offset = end_offset;
}
/* update flags */
reloc->flags |= (flags & reloc->flags);
/* write relocation packet */
cs_gem_write_dword(cs, 0xc0001000);
cs_gem_write_dword(cs, idx);
return 0;
}
}
/* new relocation */
if (csg->base.crelocs >= csg->nrelocs) {
/* allocate more memory (TODO: should use a slab allocatore maybe) */
uint32_t *tmp, size;
size = ((csg->nrelocs + 1) * sizeof(struct radeon_bo*));
tmp = (uint32_t*)realloc(csg->relocs_bo, size);
if (tmp == NULL) {
return -ENOMEM;
}
csg->relocs_bo = (struct radeon_bo**)tmp;
size = ((csg->nrelocs + 1) * 6 * 4);
tmp = (uint32_t*)realloc(csg->relocs, size);
if (tmp == NULL) {
return -ENOMEM;
}
cs->relocs = csg->relocs = tmp;
csg->nrelocs += 1;
csg->chunks[1].chunk_data = (uint64_t)(intptr_t)csg->relocs;
}
csg->relocs_bo[csg->base.crelocs] = bo;
idx = (csg->base.crelocs++) * 6;
reloc = (struct cs_reloc_gem*)&csg->relocs[idx];
reloc->handle = bo->handle;
reloc->start_offset = start_offset;
reloc->end_offset = end_offset;
reloc->read_domain = read_domain;
reloc->write_domain = write_domain;
reloc->flags = flags;
csg->chunks[1].length_dw += 6;
radeon_bo_ref(bo);
cs->relocs_total_size += bo->size;
cs_gem_write_dword(cs, 0xc0001000);
cs_gem_write_dword(cs, idx);
return 0;
}
static int cs_gem_begin(struct radeon_cs *cs,
uint32_t ndw,
const char *file,
const char *func,
int line)
{
return 0;
}
static int cs_gem_end(struct radeon_cs *cs,
const char *file,
const char *func,
int line)
{
cs->section = 0;
return 0;
}
static int cs_gem_emit(struct radeon_cs *cs)
{
struct cs_gem *csg = (struct cs_gem*)cs;
uint64_t chunk_array[2];
int r, i;
chunk_array[0] = (uint64_t)(intptr_t)&csg->chunks[0];
chunk_array[1] = (uint64_t)(intptr_t)&csg->chunks[1];
csg->cs.num_chunks = 2;
csg->cs.chunks = (uint64_t)(intptr_t)chunk_array;
r = drmCommandWriteRead(cs->csm->fd, DRM_RADEON_CS2,
&csg->cs, sizeof(struct drm_radeon_cs2));
for (i = 0; i < csg->base.crelocs; i++) {
radeon_bo_unref(csg->relocs_bo[i]);
csg->relocs_bo[i] = NULL;
}
return r;
}
static int cs_gem_destroy(struct radeon_cs *cs)
{
struct cs_gem *csg = (struct cs_gem*)cs;
free(csg->relocs_bo);
free(cs->relocs);
free(cs->packets);
free(cs);
return 0;
}
static int cs_gem_erase(struct radeon_cs *cs)
{
struct cs_gem *csg = (struct cs_gem*)cs;
int i;
if (csg->relocs_bo) {
for (i = 0; i < csg->base.crelocs; i++) {
if (csg->relocs_bo[i]) {
radeon_bo_unref(csg->relocs_bo[i]);
csg->relocs_bo[i] = NULL;
}
}
}
cs->relocs_total_size = 0;
cs->cdw = 0;
cs->section = 0;
cs->crelocs = 0;
csg->chunks[0].length_dw = 0;
csg->chunks[1].length_dw = 0;
return 0;
}
static int cs_gem_need_flush(struct radeon_cs *cs)
{
return (cs->relocs_total_size > (16*1024*1024));
}
static struct radeon_cs_funcs radeon_cs_gem_funcs = {
cs_gem_create,
cs_gem_write_dword,
cs_gem_write_reloc,
cs_gem_begin,
cs_gem_end,
cs_gem_emit,
cs_gem_destroy,
cs_gem_erase,
cs_gem_need_flush
};
struct radeon_cs_manager *radeon_cs_manager_gem(int fd)
{
struct radeon_cs_manager *csm;
csm = (struct radeon_cs_manager*)calloc(1,
sizeof(struct radeon_cs_manager));
if (csm == NULL) {
return NULL;
}
csm->funcs = &radeon_cs_gem_funcs;
csm->fd = fd;
return csm;
}
void radeon_cs_manager_gem_shutdown(struct radeon_cs_manager *csm)
{
free(csm);
}
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