static int nvhost_ioctl_channel_flush(
struct nvhost_channel_userctx *ctx,
struct nvhost_get_param_args *args,
int null_kickoff)
{
struct device *device = &ctx->ch->dev->pdev->dev;
int err;
trace_nvhost_ioctl_channel_flush(ctx->ch->desc->name);
if (!ctx->job ||
ctx->hdr.num_relocs ||
ctx->hdr.num_cmdbufs ||
ctx->hdr.num_waitchks) {
reset_submit(ctx);
dev_err(device, "channel submit out of sync\n");
return -EFAULT;
}
err = nvhost_job_pin(ctx->job);
if (err) {
dev_warn(device, "nvhost_job_pin failed: %d\n", err);
return err;
}
if (nvhost_debug_null_kickoff_pid == current->tgid)
null_kickoff = 1;
ctx->job->null_kickoff = null_kickoff;
if ((nvhost_debug_force_timeout_pid == current->tgid) &&
(nvhost_debug_force_timeout_channel == ctx->ch->chid)) {
ctx->timeout = nvhost_debug_force_timeout_val;
}
trace_write_cmdbufs(ctx->job);
/* context switch if needed, and submit user's gathers to the channel */
err = nvhost_channel_submit(ctx->job);
args->value = ctx->job->syncpt_end;
if (err)
nvhost_job_unpin(ctx->job);
return err;
}
int nvhost_gr3d_t30_read_reg(
struct platform_device *dev,
struct nvhost_channel *channel,
struct nvhost_hwctx *hwctx,
u32 offset,
u32 *value)
{
struct host1x_hwctx_handler *h = to_host1x_hwctx_handler(hwctx->h);
u32 syncpt_incrs = 1;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
void *ref;
void *read_waiter = NULL;
struct nvhost_job *job;
int err;
struct mem_handle *mem = NULL;
u32 *mem_ptr = NULL;
u32 *cmdbuf_ptr = NULL;
struct sg_table *mem_sgt = NULL;
struct mem_mgr *memmgr = hwctx->memmgr;
u32 opcodes[] = {
/* Switch to 3D - set up output to memory */
nvhost_opcode_setclass(NV_GRAPHICS_3D_CLASS_ID, 0, 0),
nvhost_opcode_imm(AR3D_GLOBAL_MEMORY_OUTPUT_READS, 1),
nvhost_opcode_nonincr(AR3D_DW_MEMORY_OUTPUT_ADDRESS, 1),
0xdeadbeef,
/* Get host1x to request a register read */
nvhost_opcode_setclass(NV_HOST1X_CLASS_ID,
host1x_uclass_indoff_r(), 1),
nvhost_class_host_indoff_reg_read(
host1x_uclass_indoff_indmodid_gr3d_v(),
offset, false),
nvhost_opcode_imm(host1x_uclass_inddata_r(), 0),
/* send reg reads back to host */
nvhost_opcode_setclass(NV_GRAPHICS_3D_CLASS_ID, 0, 0),
nvhost_opcode_imm(AR3D_GLOBAL_MEMORY_OUTPUT_READS, 0),
/* Finalize with syncpt increment */
nvhost_opcode_setclass(NV_HOST1X_CLASS_ID,
host1x_uclass_incr_syncpt_base_r(), 1),
nvhost_class_host_incr_syncpt_base(h->h.waitbase,
1),
nvhost_opcode_imm_incr_syncpt(
host1x_uclass_incr_syncpt_cond_immediate_v(),
h->h.syncpt),
};
/* 12 slots for gather, and one slot for storing the result value */
mem = nvhost_memmgr_alloc(memmgr, sizeof(opcodes)+4,
32, mem_mgr_flag_uncacheable);
if (IS_ERR(mem))
return PTR_ERR(mem);
mem_ptr = nvhost_memmgr_mmap(mem);
if (!mem_ptr) {
err = -ENOMEM;
goto done;
}
cmdbuf_ptr = mem_ptr + 1;
mem_sgt = nvhost_memmgr_pin(memmgr, mem, &channel->dev->dev);
if (IS_ERR(mem_sgt)) {
err = -ENOMEM;
mem_sgt = NULL;
goto done;
}
/* Set address of target memory slot to the stream */
opcodes[3] = sg_dma_address(mem_sgt->sgl);
read_waiter = nvhost_intr_alloc_waiter();
if (!read_waiter) {
err = -ENOMEM;
goto done;
}
job = nvhost_job_alloc(channel, hwctx, 1, 0, 0, 1, memmgr);
if (!job) {
err = -ENOMEM;
goto done;
}
job->hwctx_syncpt_idx = 0;
job->sp->id = h->h.syncpt;
job->sp->waitbase = h->h.waitbase;
job->sp->incrs = syncpt_incrs;
job->num_syncpts = 1;
job->serialize = 1;
memcpy(cmdbuf_ptr, opcodes, sizeof(opcodes));
/* Submit job */
nvhost_job_add_gather(job, nvhost_memmgr_handle_to_id(mem),
ARRAY_SIZE(opcodes), 4);
err = nvhost_job_pin(job, &nvhost_get_host(dev)->syncpt);
if (err)
goto done;
err = nvhost_channel_submit(job);
if (err)
goto done;
/* Wait for read to be ready */
err = nvhost_intr_add_action(&nvhost_get_host(dev)->intr,
h->h.syncpt, job->sp->fence,
NVHOST_INTR_ACTION_WAKEUP, &wq,
read_waiter,
&ref);
read_waiter = NULL;
WARN(err, "Failed to set wakeup interrupt");
wait_event(wq,
nvhost_syncpt_is_expired(&nvhost_get_host(dev)->syncpt,
h->h.syncpt, job->sp->fence));
nvhost_job_put(job);
job = NULL;
nvhost_intr_put_ref(&nvhost_get_host(dev)->intr, h->h.syncpt,
ref);
*value = *mem_ptr;
done:
kfree(read_waiter);
if (mem_ptr)
nvhost_memmgr_munmap(mem, mem_ptr);
if (mem_sgt)
nvhost_memmgr_unpin(memmgr, mem, &channel->dev->dev, mem_sgt);
if (mem)
nvhost_memmgr_put(memmgr, mem);
return err;
}