drm/freedreno/msm/msm_ringbuffer.c

582 lines
15 KiB
C

/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
/*
* Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
*
* 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.
*
* Authors:
* Rob Clark <robclark@freedesktop.org>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <assert.h>
#include <inttypes.h>
#include "freedreno_ringbuffer.h"
#include "msm_priv.h"
/* represents a single cmd buffer in the submit ioctl. Each cmd buffer has
* a backing bo, and a reloc table.
*/
struct msm_cmd {
struct list_head list;
struct fd_ringbuffer *ring;
struct fd_bo *ring_bo;
/* reloc's table: */
struct drm_msm_gem_submit_reloc *relocs;
uint32_t nr_relocs, max_relocs;
uint32_t size;
};
struct msm_ringbuffer {
struct fd_ringbuffer base;
/* submit ioctl related tables:
* Note that bos and cmds are tracked by the parent ringbuffer, since
* that is global to the submit ioctl call. The reloc's table is tracked
* per cmd-buffer.
*/
struct {
/* bo's table: */
struct drm_msm_gem_submit_bo *bos;
uint32_t nr_bos, max_bos;
/* cmd's table: */
struct drm_msm_gem_submit_cmd *cmds;
uint32_t nr_cmds, max_cmds;
} submit;
/* should have matching entries in submit.bos: */
/* Note, only in parent ringbuffer */
struct fd_bo **bos;
uint32_t nr_bos, max_bos;
/* should have matching entries in submit.cmds: */
struct msm_cmd **cmds;
uint32_t nr_cmds, max_cmds;
/* List of physical cmdstream buffers (msm_cmd) assocated with this
* logical fd_ringbuffer.
*
* Note that this is different from msm_ringbuffer::cmds (which
* shadows msm_ringbuffer::submit::cmds for tracking submit ioctl
* related stuff, and *only* is tracked in the parent ringbuffer.
* And only has "completed" cmd buffers (ie. we already know the
* size) added via get_cmd().
*/
struct list_head cmd_list;
int is_growable;
unsigned cmd_count;
unsigned seqno;
/* maps fd_bo to idx: */
void *bo_table;
};
static inline struct msm_ringbuffer * to_msm_ringbuffer(struct fd_ringbuffer *x)
{
return (struct msm_ringbuffer *)x;
}
#define INIT_SIZE 0x1000
static pthread_mutex_t idx_lock = PTHREAD_MUTEX_INITIALIZER;
drm_private extern pthread_mutex_t table_lock;
static void ring_bo_del(struct fd_device *dev, struct fd_bo *bo)
{
int ret;
pthread_mutex_lock(&table_lock);
ret = fd_bo_cache_free(&to_msm_device(dev)->ring_cache, bo);
pthread_mutex_unlock(&table_lock);
if (ret == 0)
return;
fd_bo_del(bo);
}
static struct fd_bo * ring_bo_new(struct fd_device *dev, uint32_t size)
{
struct fd_bo *bo;
bo = fd_bo_cache_alloc(&to_msm_device(dev)->ring_cache, &size, 0);
if (bo)
return bo;
bo = fd_bo_new(dev, size, 0);
if (!bo)
return NULL;
/* keep ringbuffer bo's out of the normal bo cache: */
bo->bo_reuse = FALSE;
return bo;
}
static void ring_cmd_del(struct msm_cmd *cmd)
{
if (cmd->ring_bo)
ring_bo_del(cmd->ring->pipe->dev, cmd->ring_bo);
list_del(&cmd->list);
to_msm_ringbuffer(cmd->ring)->cmd_count--;
free(cmd->relocs);
free(cmd);
}
static struct msm_cmd * ring_cmd_new(struct fd_ringbuffer *ring, uint32_t size)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
struct msm_cmd *cmd = calloc(1, sizeof(*cmd));
if (!cmd)
return NULL;
cmd->ring = ring;
cmd->ring_bo = ring_bo_new(ring->pipe->dev, size);
if (!cmd->ring_bo)
goto fail;
list_addtail(&cmd->list, &msm_ring->cmd_list);
msm_ring->cmd_count++;
return cmd;
fail:
ring_cmd_del(cmd);
return NULL;
}
static void *grow(void *ptr, uint32_t nr, uint32_t *max, uint32_t sz)
{
if ((nr + 1) > *max) {
if ((*max * 2) < (nr + 1))
*max = nr + 5;
else
*max = *max * 2;
ptr = realloc(ptr, *max * sz);
}
return ptr;
}
#define APPEND(x, name) ({ \
(x)->name = grow((x)->name, (x)->nr_ ## name, &(x)->max_ ## name, sizeof((x)->name[0])); \
(x)->nr_ ## name ++; \
})
static struct msm_cmd *current_cmd(struct fd_ringbuffer *ring)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
assert(!LIST_IS_EMPTY(&msm_ring->cmd_list));
return LIST_LAST_ENTRY(&msm_ring->cmd_list, struct msm_cmd, list);
}
static uint32_t append_bo(struct fd_ringbuffer *ring, struct fd_bo *bo)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
uint32_t idx;
idx = APPEND(&msm_ring->submit, bos);
idx = APPEND(msm_ring, bos);
msm_ring->submit.bos[idx].flags = 0;
msm_ring->submit.bos[idx].handle = bo->handle;
msm_ring->submit.bos[idx].presumed = to_msm_bo(bo)->presumed;
msm_ring->bos[idx] = fd_bo_ref(bo);
return idx;
}
/* add (if needed) bo, return idx: */
static uint32_t bo2idx(struct fd_ringbuffer *ring, struct fd_bo *bo, uint32_t flags)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
struct msm_bo *msm_bo = to_msm_bo(bo);
uint32_t idx;
pthread_mutex_lock(&idx_lock);
if (msm_bo->current_ring_seqno == msm_ring->seqno) {
idx = msm_bo->idx;
} else {
void *val;
if (!msm_ring->bo_table)
msm_ring->bo_table = drmHashCreate();
if (!drmHashLookup(msm_ring->bo_table, bo->handle, &val)) {
/* found */
idx = (uint32_t)(uintptr_t)val;
} else {
idx = append_bo(ring, bo);
val = (void *)(uintptr_t)idx;
drmHashInsert(msm_ring->bo_table, bo->handle, val);
}
msm_bo->current_ring_seqno = msm_ring->seqno;
msm_bo->idx = idx;
}
pthread_mutex_unlock(&idx_lock);
if (flags & FD_RELOC_READ)
msm_ring->submit.bos[idx].flags |= MSM_SUBMIT_BO_READ;
if (flags & FD_RELOC_WRITE)
msm_ring->submit.bos[idx].flags |= MSM_SUBMIT_BO_WRITE;
return idx;
}
static int check_cmd_bo(struct fd_ringbuffer *ring,
struct drm_msm_gem_submit_cmd *cmd, struct fd_bo *bo)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
return msm_ring->submit.bos[cmd->submit_idx].handle == bo->handle;
}
/* Ensure that submit has corresponding entry in cmds table for the
* target cmdstream buffer:
*/
static void get_cmd(struct fd_ringbuffer *ring, struct msm_cmd *target_cmd,
uint32_t submit_offset, uint32_t size, uint32_t type)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
struct drm_msm_gem_submit_cmd *cmd;
uint32_t i;
/* figure out if we already have a cmd buf: */
for (i = 0; i < msm_ring->submit.nr_cmds; i++) {
cmd = &msm_ring->submit.cmds[i];
if ((cmd->submit_offset == submit_offset) &&
(cmd->size == size) &&
(cmd->type == type) &&
check_cmd_bo(ring, cmd, target_cmd->ring_bo))
return;
}
/* create cmd buf if not: */
i = APPEND(&msm_ring->submit, cmds);
APPEND(msm_ring, cmds);
msm_ring->cmds[i] = target_cmd;
cmd = &msm_ring->submit.cmds[i];
cmd->type = type;
cmd->submit_idx = bo2idx(ring, target_cmd->ring_bo, FD_RELOC_READ);
cmd->submit_offset = submit_offset;
cmd->size = size;
cmd->pad = 0;
target_cmd->size = size;
}
static void * msm_ringbuffer_hostptr(struct fd_ringbuffer *ring)
{
return fd_bo_map(current_cmd(ring)->ring_bo);
}
static uint32_t find_next_reloc_idx(struct msm_cmd *msm_cmd,
uint32_t start, uint32_t offset)
{
uint32_t i;
/* a binary search would be more clever.. */
for (i = start; i < msm_cmd->nr_relocs; i++) {
struct drm_msm_gem_submit_reloc *reloc = &msm_cmd->relocs[i];
if (reloc->submit_offset >= offset)
return i;
}
return i;
}
static void delete_cmds(struct msm_ringbuffer *msm_ring)
{
struct msm_cmd *cmd, *tmp;
LIST_FOR_EACH_ENTRY_SAFE(cmd, tmp, &msm_ring->cmd_list, list) {
ring_cmd_del(cmd);
}
}
static void flush_reset(struct fd_ringbuffer *ring)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
unsigned i;
for (i = 0; i < msm_ring->nr_bos; i++) {
struct msm_bo *msm_bo = to_msm_bo(msm_ring->bos[i]);
msm_bo->current_ring_seqno = 0;
fd_bo_del(&msm_bo->base);
}
/* for each of the cmd buffers, clear their reloc's: */
for (i = 0; i < msm_ring->submit.nr_cmds; i++) {
struct msm_cmd *target_cmd = msm_ring->cmds[i];
target_cmd->nr_relocs = 0;
}
msm_ring->submit.nr_cmds = 0;
msm_ring->submit.nr_bos = 0;
msm_ring->nr_cmds = 0;
msm_ring->nr_bos = 0;
if (msm_ring->bo_table) {
drmHashDestroy(msm_ring->bo_table);
msm_ring->bo_table = NULL;
}
if (msm_ring->is_growable) {
delete_cmds(msm_ring);
} else {
/* in old mode, just reset the # of relocs: */
current_cmd(ring)->nr_relocs = 0;
}
}
static void finalize_current_cmd(struct fd_ringbuffer *ring, uint32_t *last_start)
{
uint32_t submit_offset, size, type;
struct fd_ringbuffer *parent;
if (ring->parent) {
parent = ring->parent;
type = MSM_SUBMIT_CMD_IB_TARGET_BUF;
} else {
parent = ring;
type = MSM_SUBMIT_CMD_BUF;
}
submit_offset = offset_bytes(last_start, ring->start);
size = offset_bytes(ring->cur, last_start);
get_cmd(parent, current_cmd(ring), submit_offset, size, type);
}
static void dump_submit(struct msm_ringbuffer *msm_ring)
{
uint32_t i, j;
for (i = 0; i < msm_ring->submit.nr_bos; i++) {
struct drm_msm_gem_submit_bo *bo = &msm_ring->submit.bos[i];
ERROR_MSG(" bos[%d]: handle=%u, flags=%x", i, bo->handle, bo->flags);
}
for (i = 0; i < msm_ring->submit.nr_cmds; i++) {
struct drm_msm_gem_submit_cmd *cmd = &msm_ring->submit.cmds[i];
struct drm_msm_gem_submit_reloc *relocs = U642VOID(cmd->relocs);
ERROR_MSG(" cmd[%d]: type=%u, submit_idx=%u, submit_offset=%u, size=%u",
i, cmd->type, cmd->submit_idx, cmd->submit_offset, cmd->size);
for (j = 0; j < cmd->nr_relocs; j++) {
struct drm_msm_gem_submit_reloc *r = &relocs[j];
ERROR_MSG(" reloc[%d]: submit_offset=%u, or=%08x, shift=%d, reloc_idx=%u"
", reloc_offset=%"PRIu64, j, r->submit_offset, r->or, r->shift,
r->reloc_idx, r->reloc_offset);
}
}
}
static int msm_ringbuffer_flush(struct fd_ringbuffer *ring, uint32_t *last_start)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
struct drm_msm_gem_submit req = {
.pipe = to_msm_pipe(ring->pipe)->pipe,
};
uint32_t i;
int ret;
finalize_current_cmd(ring, last_start);
/* needs to be after get_cmd() as that could create bos/cmds table: */
req.bos = VOID2U64(msm_ring->submit.bos),
req.nr_bos = msm_ring->submit.nr_bos;
req.cmds = VOID2U64(msm_ring->submit.cmds),
req.nr_cmds = msm_ring->submit.nr_cmds;
/* for each of the cmd's fix up their reloc's: */
for (i = 0; i < msm_ring->submit.nr_cmds; i++) {
struct drm_msm_gem_submit_cmd *cmd = &msm_ring->submit.cmds[i];
struct msm_cmd *msm_cmd = msm_ring->cmds[i];
uint32_t a = find_next_reloc_idx(msm_cmd, 0, cmd->submit_offset);
uint32_t b = find_next_reloc_idx(msm_cmd, a, cmd->submit_offset + cmd->size);
cmd->relocs = VOID2U64(&msm_cmd->relocs[a]);
cmd->nr_relocs = (b > a) ? b - a : 0;
}
DEBUG_MSG("nr_cmds=%u, nr_bos=%u", req.nr_cmds, req.nr_bos);
ret = drmCommandWriteRead(ring->pipe->dev->fd, DRM_MSM_GEM_SUBMIT,
&req, sizeof(req));
if (ret) {
ERROR_MSG("submit failed: %d (%s)", ret, strerror(errno));
dump_submit(msm_ring);
} else if (!ret) {
/* update timestamp on all rings associated with submit: */
for (i = 0; i < msm_ring->submit.nr_cmds; i++) {
struct msm_cmd *msm_cmd = msm_ring->cmds[i];
msm_cmd->ring->last_timestamp = req.fence;
}
}
flush_reset(ring);
return ret;
}
static void msm_ringbuffer_grow(struct fd_ringbuffer *ring, uint32_t size)
{
assert(to_msm_ringbuffer(ring)->is_growable);
finalize_current_cmd(ring, ring->last_start);
ring_cmd_new(ring, size);
}
static void msm_ringbuffer_reset(struct fd_ringbuffer *ring)
{
flush_reset(ring);
}
static void msm_ringbuffer_emit_reloc(struct fd_ringbuffer *ring,
const struct fd_reloc *r)
{
struct fd_ringbuffer *parent = ring->parent ? ring->parent : ring;
struct msm_bo *msm_bo = to_msm_bo(r->bo);
struct drm_msm_gem_submit_reloc *reloc;
struct msm_cmd *cmd = current_cmd(ring);
uint32_t idx = APPEND(cmd, relocs);
uint32_t addr;
reloc = &cmd->relocs[idx];
reloc->reloc_idx = bo2idx(parent, r->bo, r->flags);
reloc->reloc_offset = r->offset;
reloc->or = r->or;
reloc->shift = r->shift;
reloc->submit_offset = offset_bytes(ring->cur, ring->start);
addr = msm_bo->presumed;
if (r->shift < 0)
addr >>= -r->shift;
else
addr <<= r->shift;
(*ring->cur++) = addr | r->or;
}
static uint32_t msm_ringbuffer_emit_reloc_ring(struct fd_ringbuffer *ring,
struct fd_ringbuffer *target, uint32_t cmd_idx,
uint32_t submit_offset, uint32_t size)
{
struct msm_cmd *cmd = NULL;
uint32_t idx = 0;
LIST_FOR_EACH_ENTRY(cmd, &to_msm_ringbuffer(target)->cmd_list, list) {
if (idx == cmd_idx)
break;
idx++;
}
assert(cmd && (idx == cmd_idx));
if (idx < (to_msm_ringbuffer(target)->cmd_count - 1)) {
/* All but the last cmd buffer is fully "baked" (ie. already has
* done get_cmd() to add it to the cmds table). But in this case,
* the size we get is invalid (since it is calculated from the
* last cmd buffer):
*/
size = cmd->size;
} else {
get_cmd(ring, cmd, submit_offset, size, MSM_SUBMIT_CMD_IB_TARGET_BUF);
}
msm_ringbuffer_emit_reloc(ring, &(struct fd_reloc){
.bo = cmd->ring_bo,
.flags = FD_RELOC_READ,
.offset = submit_offset,
});
return size;
}
static uint32_t msm_ringbuffer_cmd_count(struct fd_ringbuffer *ring)
{
return to_msm_ringbuffer(ring)->cmd_count;
}
static void msm_ringbuffer_destroy(struct fd_ringbuffer *ring)
{
struct msm_ringbuffer *msm_ring = to_msm_ringbuffer(ring);
flush_reset(ring);
delete_cmds(msm_ring);
free(msm_ring->submit.cmds);
free(msm_ring->submit.bos);
free(msm_ring->bos);
free(msm_ring->cmds);
free(msm_ring);
}
static const struct fd_ringbuffer_funcs funcs = {
.hostptr = msm_ringbuffer_hostptr,
.flush = msm_ringbuffer_flush,
.grow = msm_ringbuffer_grow,
.reset = msm_ringbuffer_reset,
.emit_reloc = msm_ringbuffer_emit_reloc,
.emit_reloc_ring = msm_ringbuffer_emit_reloc_ring,
.cmd_count = msm_ringbuffer_cmd_count,
.destroy = msm_ringbuffer_destroy,
};
drm_private struct fd_ringbuffer * msm_ringbuffer_new(struct fd_pipe *pipe,
uint32_t size)
{
struct msm_ringbuffer *msm_ring;
struct fd_ringbuffer *ring = NULL;
msm_ring = calloc(1, sizeof(*msm_ring));
if (!msm_ring) {
ERROR_MSG("allocation failed");
goto fail;
}
if (size == 0) {
assert(pipe->dev->version >= FD_VERSION_UNLIMITED_CMDS);
size = INIT_SIZE;
msm_ring->is_growable = TRUE;
}
list_inithead(&msm_ring->cmd_list);
msm_ring->seqno = ++to_msm_device(pipe->dev)->ring_cnt;
ring = &msm_ring->base;
ring->funcs = &funcs;
ring->size = size;
ring->pipe = pipe; /* needed in ring_cmd_new() */
ring_cmd_new(ring, size);
return ring;
fail:
if (ring)
fd_ringbuffer_del(ring);
return NULL;
}