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/* -*- 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>
*/
#include <assert.h>
#include "freedreno_ringbuffer.h"
#include "kgsl_priv.h"
/* because kgsl tries to validate the gpuaddr on kernel side in ISSUEIBCMDS,
* we can't use normal gem bo's for ringbuffer.. someday the kernel part
* needs to be reworked into a single sane drm driver :-/
*/
struct kgsl_rb_bo {
struct kgsl_pipe *pipe;
void *hostptr;
uint32_t gpuaddr;
uint32_t size;
};
struct kgsl_ringbuffer {
struct fd_ringbuffer base;
struct kgsl_rb_bo *bo;
};
static inline struct kgsl_ringbuffer * to_kgsl_ringbuffer(struct fd_ringbuffer *x)
{
return (struct kgsl_ringbuffer *)x;
}
static void kgsl_rb_bo_del(struct kgsl_rb_bo *bo)
{
struct kgsl_sharedmem_free req = {
.gpuaddr = bo->gpuaddr,
};
int ret;
munmap(bo->hostptr, bo->size);
ret = ioctl(bo->pipe->fd, IOCTL_KGSL_SHAREDMEM_FREE, &req);
if (ret) {
ERROR_MSG("sharedmem free failed: %s", strerror(errno));
}
free(bo);
}
static struct kgsl_rb_bo * kgsl_rb_bo_new(struct kgsl_pipe *pipe, uint32_t size)
{
struct kgsl_rb_bo *bo;
struct kgsl_gpumem_alloc req = {
.size = ALIGN(size, 4096),
.flags = KGSL_MEMFLAGS_GPUREADONLY,
};
int ret;
bo = calloc(1, sizeof(*bo));
if (!bo) {
ERROR_MSG("allocation failed");
return NULL;
}
ret = ioctl(pipe->fd, IOCTL_KGSL_GPUMEM_ALLOC, &req);
if (ret) {
ERROR_MSG("gpumem allocation failed: %s", strerror(errno));
goto fail;
}
bo->pipe = pipe;
bo->gpuaddr = req.gpuaddr;
bo->size = size;
bo->hostptr = mmap(NULL, size, PROT_WRITE|PROT_READ,
MAP_SHARED, pipe->fd, req.gpuaddr);
return bo;
fail:
if (bo)
kgsl_rb_bo_del(bo);
return NULL;
}
static void * kgsl_ringbuffer_hostptr(struct fd_ringbuffer *ring)
{
struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring);
return kgsl_ring->bo->hostptr;
}
static int kgsl_ringbuffer_flush(struct fd_ringbuffer *ring, uint32_t *last_start)
{
struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring);
struct kgsl_pipe *kgsl_pipe = to_kgsl_pipe(ring->pipe);
uint32_t offset = (uint8_t *)last_start - (uint8_t *)ring->start;
struct kgsl_ibdesc ibdesc = {
.gpuaddr = kgsl_ring->bo->gpuaddr + offset,
.hostptr = last_start,
.sizedwords = ring->cur - last_start,
};
struct kgsl_ringbuffer_issueibcmds req = {
.drawctxt_id = kgsl_pipe->drawctxt_id,
.ibdesc_addr = (unsigned long)&ibdesc,
.numibs = 1,
.flags = KGSL_CONTEXT_SUBMIT_IB_LIST,
};
int ret;
kgsl_pipe_pre_submit(kgsl_pipe);
/* z180_cmdstream_issueibcmds() is made of fail: */
if (ring->pipe->id == FD_PIPE_2D) {
/* fix up size field in last cmd packet */
uint32_t last_size = (uint32_t)(ring->cur - last_start);
/* 5 is length of first packet, 2 for the two 7f000000's */
last_start[2] = last_size - (5 + 2);
ibdesc.gpuaddr = kgsl_ring->bo->gpuaddr;
ibdesc.hostptr = kgsl_ring->bo->hostptr;
ibdesc.sizedwords = 0x145;
req.timestamp = (uint32_t)kgsl_ring->bo->hostptr;
}
do {
ret = ioctl(kgsl_pipe->fd, IOCTL_KGSL_RINGBUFFER_ISSUEIBCMDS, &req);
} while ((ret == -1) && ((errno == EINTR) || (errno == EAGAIN)));
if (ret)
ERROR_MSG("issueibcmds failed! %d (%s)", ret, strerror(errno));
ring->last_timestamp = req.timestamp;
ring->last_start = ring->cur;
kgsl_pipe_post_submit(kgsl_pipe, req.timestamp);
return ret;
}
static void kgsl_ringbuffer_emit_reloc(struct fd_ringbuffer *ring,
const struct fd_reloc *r)
{
struct kgsl_bo *kgsl_bo = to_kgsl_bo(r->bo);
uint32_t addr = kgsl_bo_gpuaddr(kgsl_bo, r->offset);
assert(addr);
if (r->shift < 0)
addr >>= -r->shift;
else
addr <<= r->shift;
(*ring->cur++) = addr | r->or;
kgsl_pipe_add_submit(to_kgsl_pipe(ring->pipe), kgsl_bo);
}
static void kgsl_ringbuffer_emit_reloc_ring(struct fd_ringbuffer *ring,
struct fd_ringmarker *target, struct fd_ringmarker *end)
{
struct kgsl_ringbuffer *target_ring = to_kgsl_ringbuffer(target->ring);
(*ring->cur++) = target_ring->bo->gpuaddr +
(uint8_t *)target->cur - (uint8_t *)target->ring->start;
}
static void kgsl_ringbuffer_destroy(struct fd_ringbuffer *ring)
{
struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring);
if (ring->last_timestamp)
fd_pipe_wait(ring->pipe, ring->last_timestamp);
if (kgsl_ring->bo)
kgsl_rb_bo_del(kgsl_ring->bo);
free(kgsl_ring);
}
static struct fd_ringbuffer_funcs funcs = {
.hostptr = kgsl_ringbuffer_hostptr,
.flush = kgsl_ringbuffer_flush,
.emit_reloc = kgsl_ringbuffer_emit_reloc,
.emit_reloc_ring = kgsl_ringbuffer_emit_reloc_ring,
.destroy = kgsl_ringbuffer_destroy,
};
struct fd_ringbuffer * kgsl_ringbuffer_new(struct fd_pipe *pipe,
uint32_t size)
{
struct kgsl_ringbuffer *kgsl_ring;
struct fd_ringbuffer *ring = NULL;
kgsl_ring = calloc(1, sizeof(*kgsl_ring));
if (!kgsl_ring) {
ERROR_MSG("allocation failed");
goto fail;
}
ring = &kgsl_ring->base;
ring->funcs = &funcs;
kgsl_ring->bo = kgsl_rb_bo_new(to_kgsl_pipe(pipe), size);
if (!kgsl_ring->bo) {
ERROR_MSG("ringbuffer allocation failed");
goto fail;
}
return ring;
fail:
if (ring)
fd_ringbuffer_del(ring);
return NULL;
}
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