int nvhost_syncpt_is_expired_ext(struct platform_device *dev,
u32 id, u32 thresh)
{
struct nvhost_master *master = nvhost_get_host(dev);
struct nvhost_syncpt *sp = &master->syncpt;
return nvhost_syncpt_is_expired(sp, id, thresh);
}
/**
* Updated sync point form hardware, and returns true if syncpoint is expired,
* false if we may need to wait
*/
static bool syncpt_update_min_is_expired(
struct nvhost_syncpt *sp,
u32 id,
u32 thresh)
{
syncpt_op().update_min(sp, id);
return nvhost_syncpt_is_expired(sp, id, thresh);
}
/* check for old WAITs to be removed (avoiding a wrap) */
static int t20_syncpt_wait_check(struct nvhost_syncpt *sp,
struct nvmap_client *nvmap,
u32 waitchk_mask,
struct nvhost_waitchk *wait,
int num_waitchk)
{
u32 idx;
int err = 0;
/* get current syncpt values */
for (idx = 0; idx < NV_HOST1X_SYNCPT_NB_PTS; idx++) {
if (BIT(idx) & waitchk_mask)
nvhost_syncpt_update_min(sp, idx);
}
BUG_ON(!wait && !num_waitchk);
/* compare syncpt vs wait threshold */
while (num_waitchk) {
u32 override;
BUG_ON(wait->syncpt_id >= NV_HOST1X_SYNCPT_NB_PTS);
trace_nvhost_syncpt_wait_check(wait->mem, wait->offset,
wait->syncpt_id, wait->thresh);
if (nvhost_syncpt_is_expired(sp,
wait->syncpt_id, wait->thresh)) {
/*
* NULL an already satisfied WAIT_SYNCPT host method,
* by patching its args in the command stream. The
* method data is changed to reference a reserved
* (never given out or incr) NVSYNCPT_GRAPHICS_HOST
* syncpt with a matching threshold value of 0, so
* is guaranteed to be popped by the host HW.
*/
dev_dbg(&syncpt_to_dev(sp)->dev->dev,
"drop WAIT id %d (%s) thresh 0x%x, min 0x%x\n",
wait->syncpt_id,
syncpt_op(sp).name(sp, wait->syncpt_id),
wait->thresh,
nvhost_syncpt_read_min(sp, wait->syncpt_id));
/* patch the wait */
override = nvhost_class_host_wait_syncpt(
NVSYNCPT_GRAPHICS_HOST, 0);
err = nvmap_patch_word(nvmap,
(struct nvmap_handle *)wait->mem,
wait->offset, override);
if (err)
break;
}
/*
* Check driver supplied waitchk structs for syncpt thresholds
* that have already been satisfied and NULL the comparison (to
* avoid a wrap condition in the HW).
*/
static int do_waitchks(struct nvhost_job *job, struct nvhost_syncpt *sp,
u32 patch_mem, void *patch_addr)
{
int i;
/* compare syncpt vs wait threshold */
for (i = 0; i < job->num_waitchk; i++) {
struct nvhost_waitchk *wait = &job->waitchk[i];
/* skip all other gathers */
if (patch_mem != wait->mem)
continue;
trace_nvhost_syncpt_wait_check(wait->mem, wait->offset,
wait->syncpt_id, wait->thresh,
nvhost_syncpt_read(sp, wait->syncpt_id));
if (nvhost_syncpt_is_expired(sp,
wait->syncpt_id, wait->thresh)) {
/*
* NULL an already satisfied WAIT_SYNCPT host method,
* by patching its args in the command stream. The
* method data is changed to reference a reserved
* (never given out or incr) NVSYNCPT_GRAPHICS_HOST
* syncpt with a matching threshold value of 0, so
* is guaranteed to be popped by the host HW.
*/
dev_dbg(&syncpt_to_dev(sp)->dev->dev,
"drop WAIT id %d (%s) thresh 0x%x, min 0x%x\n",
wait->syncpt_id,
syncpt_op().name(sp, wait->syncpt_id),
wait->thresh,
nvhost_syncpt_read_min(sp, wait->syncpt_id));
/* patch the wait */
nvhost_syncpt_patch_wait(sp,
(patch_addr + wait->offset));
}
wait->mem = 0;
}
return 0;
}
/**
* Main entrypoint for syncpoint value waits.
*/
int nvhost_syncpt_wait_timeout(struct nvhost_syncpt *sp, u32 id,
u32 thresh, u32 timeout, u32 *value)
{
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
void *ref;
void *waiter;
int err = 0, check_count = 0, low_timeout = 0;
u32 val;
if (value)
*value = 0;
/* first check cache */
if (nvhost_syncpt_is_expired(sp, id, thresh)) {
if (value)
*value = nvhost_syncpt_read_min(sp, id);
return 0;
}
/* keep host alive */
nvhost_module_busy(syncpt_to_dev(sp)->dev);
/* try to read from register */
val = syncpt_op().update_min(sp, id);
if (nvhost_syncpt_is_expired(sp, id, thresh)) {
if (value)
*value = val;
goto done;
}
if (!timeout) {
err = -EAGAIN;
goto done;
}
/* schedule a wakeup when the syncpoint value is reached */
waiter = nvhost_intr_alloc_waiter();
if (!waiter) {
err = -ENOMEM;
goto done;
}
err = nvhost_intr_add_action(&(syncpt_to_dev(sp)->intr), id, thresh,
NVHOST_INTR_ACTION_WAKEUP_INTERRUPTIBLE, &wq,
waiter,
&ref);
if (err)
goto done;
err = -EAGAIN;
/* Caller-specified timeout may be impractically low */
if (timeout < SYNCPT_CHECK_PERIOD)
low_timeout = timeout;
/* wait for the syncpoint, or timeout, or signal */
while (timeout) {
u32 check = min_t(u32, SYNCPT_CHECK_PERIOD, timeout);
int remain = wait_event_interruptible_timeout(wq,
syncpt_update_min_is_expired(sp, id, thresh),
check);
if (remain > 0 || nvhost_syncpt_is_expired(sp, id, thresh)) {
if (value)
*value = nvhost_syncpt_read_min(sp, id);
err = 0;
break;
}
if (remain < 0) {
err = remain;
break;
}
if (timeout != NVHOST_NO_TIMEOUT)
timeout -= check;
if (timeout && check_count <= MAX_STUCK_CHECK_COUNT) {
dev_warn(&syncpt_to_dev(sp)->dev->dev,
"%s: syncpoint id %d (%s) stuck waiting %d, timeout=%d\n",
current->comm, id, syncpt_op().name(sp, id),
thresh, timeout);
syncpt_op().debug(sp);
if (check_count == MAX_STUCK_CHECK_COUNT) {
if (low_timeout) {
dev_warn(&syncpt_to_dev(sp)->dev->dev,
"is timeout %d too low?\n",
low_timeout);
}
nvhost_debug_dump(syncpt_to_dev(sp));
}
check_count++;
}
}
nvhost_intr_put_ref(&(syncpt_to_dev(sp)->intr), id, ref);
done:
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return err;
}
int nvhost_gr3d_t20_read_reg(
struct nvhost_device *dev,
struct nvhost_channel *channel,
struct nvhost_hwctx *hwctx,
u32 offset,
u32 *value)
{
struct host1x_hwctx *hwctx_to_save = NULL;
struct nvhost_hwctx_handler *h = hwctx->h;
struct host1x_hwctx_handler *p = to_host1x_hwctx_handler(h);
bool need_restore = false;
u32 syncpt_incrs = 4;
unsigned int pending = 0;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
void *ref;
void *ctx_waiter, *read_waiter, *completed_waiter;
struct nvhost_job *job;
u32 syncval;
int err;
if (hwctx->has_timedout)
return -ETIMEDOUT;
ctx_waiter = nvhost_intr_alloc_waiter();
read_waiter = nvhost_intr_alloc_waiter();
completed_waiter = nvhost_intr_alloc_waiter();
if (!ctx_waiter || !read_waiter || !completed_waiter) {
err = -ENOMEM;
goto done;
}
job = nvhost_job_alloc(channel, hwctx,
NULL,
nvhost_get_host(dev)->memmgr, 0, 0);
if (!job) {
err = -ENOMEM;
goto done;
}
/* keep module powered */
nvhost_module_busy(dev);
/* get submit lock */
err = mutex_lock_interruptible(&channel->submitlock);
if (err) {
nvhost_module_idle(dev);
return err;
}
/* context switch */
if (channel->cur_ctx != hwctx) {
hwctx_to_save = channel->cur_ctx ?
to_host1x_hwctx(channel->cur_ctx) : NULL;
if (hwctx_to_save) {
syncpt_incrs += hwctx_to_save->save_incrs;
hwctx_to_save->hwctx.valid = true;
nvhost_job_get_hwctx(job, &hwctx_to_save->hwctx);
}
channel->cur_ctx = hwctx;
if (channel->cur_ctx && channel->cur_ctx->valid) {
need_restore = true;
syncpt_incrs += to_host1x_hwctx(channel->cur_ctx)
->restore_incrs;
}
}
syncval = nvhost_syncpt_incr_max(&nvhost_get_host(dev)->syncpt,
p->syncpt, syncpt_incrs);
job->syncpt_id = p->syncpt;
job->syncpt_incrs = syncpt_incrs;
job->syncpt_end = syncval;
/* begin a CDMA submit */
nvhost_cdma_begin(&channel->cdma, job);
/* push save buffer (pre-gather setup depends on unit) */
if (hwctx_to_save)
h->save_push(&hwctx_to_save->hwctx, &channel->cdma);
/* gather restore buffer */
if (need_restore)
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_gather(to_host1x_hwctx(channel->cur_ctx)
->restore_size),
to_host1x_hwctx(channel->cur_ctx)->restore_phys);
/* Switch to 3D - wait for it to complete what it was doing */
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_setclass(NV_GRAPHICS_3D_CLASS_ID, 0, 0),
nvhost_opcode_imm_incr_syncpt(
host1x_uclass_incr_syncpt_cond_op_done_v(),
p->syncpt));
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_setclass(NV_HOST1X_CLASS_ID,
host1x_uclass_wait_syncpt_base_r(), 1),
nvhost_class_host_wait_syncpt_base(p->syncpt,
p->waitbase, 1));
/* Tell 3D to send register value to FIFO */
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_nonincr(host1x_uclass_indoff_r(), 1),
nvhost_class_host_indoff_reg_read(
host1x_uclass_indoff_indmodid_gr3d_v(),
offset, false));
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_imm(host1x_uclass_inddata_r(), 0),
NVHOST_OPCODE_NOOP);
/* Increment syncpt to indicate that FIFO can be read */
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_imm_incr_syncpt(
host1x_uclass_incr_syncpt_cond_immediate_v(),
p->syncpt),
NVHOST_OPCODE_NOOP);
/* Wait for value to be read from FIFO */
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_nonincr(host1x_uclass_wait_syncpt_base_r(), 1),
nvhost_class_host_wait_syncpt_base(p->syncpt,
p->waitbase, 3));
/* Indicate submit complete */
nvhost_cdma_push(&channel->cdma,
nvhost_opcode_nonincr(host1x_uclass_incr_syncpt_base_r(), 1),
nvhost_class_host_incr_syncpt_base(p->waitbase, 4));
nvhost_cdma_push(&channel->cdma,
NVHOST_OPCODE_NOOP,
nvhost_opcode_imm_incr_syncpt(
host1x_uclass_incr_syncpt_cond_immediate_v(),
p->syncpt));
/* end CDMA submit */
nvhost_cdma_end(&channel->cdma, job);
nvhost_job_put(job);
job = NULL;
/*
* schedule a context save interrupt (to drain the host FIFO
* if necessary, and to release the restore buffer)
*/
if (hwctx_to_save) {
err = nvhost_intr_add_action(
&nvhost_get_host(dev)->intr,
p->syncpt,
syncval - syncpt_incrs
+ hwctx_to_save->save_incrs
- 1,
NVHOST_INTR_ACTION_CTXSAVE, hwctx_to_save,
ctx_waiter,
NULL);
ctx_waiter = NULL;
WARN(err, "Failed to set context save interrupt");
}
/* Wait for FIFO to be ready */
err = nvhost_intr_add_action(&nvhost_get_host(dev)->intr,
p->syncpt, syncval - 2,
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,
p->syncpt, syncval - 2));
nvhost_intr_put_ref(&nvhost_get_host(dev)->intr, p->syncpt,
ref);
/* Read the register value from FIFO */
err = nvhost_channel_drain_read_fifo(channel, value, 1, &pending);
/* Indicate we've read the value */
nvhost_syncpt_cpu_incr(&nvhost_get_host(dev)->syncpt,
p->syncpt);
/* Schedule a submit complete interrupt */
err = nvhost_intr_add_action(&nvhost_get_host(dev)->intr,
p->syncpt, syncval,
NVHOST_INTR_ACTION_SUBMIT_COMPLETE, channel,
completed_waiter, NULL);
completed_waiter = NULL;
WARN(err, "Failed to set submit complete interrupt");
mutex_unlock(&channel->submitlock);
done:
kfree(ctx_waiter);
kfree(read_waiter);
kfree(completed_waiter);
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;
}
