/**
* Get the current syncpoint value
*/
u32 nvhost_syncpt_read(struct nvhost_syncpt *sp, u32 id)
{
u32 val;
BUG_ON(!syncpt_op().update_min);
nvhost_module_busy(syncpt_to_dev(sp)->dev);
val = syncpt_op().update_min(sp, id);
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return val;
}
/**
* Resets syncpoint and waitbase values to sw shadows
*/
void nvhost_syncpt_reset(struct nvhost_syncpt *sp)
{
u32 i;
for (i = 0; i < nvhost_syncpt_nb_pts(sp); i++)
syncpt_op().reset(sp, i);
for (i = 0; i < nvhost_syncpt_nb_bases(sp); i++)
syncpt_op().reset_wait_base(sp, i);
wmb();
}
/**
* Get the current syncpoint base
*/
u32 nvhost_syncpt_read_wait_base(struct nvhost_syncpt *sp, u32 id)
{
u32 val;
BUG_ON(!syncpt_op().read_wait_base);
nvhost_module_busy(syncpt_to_dev(sp)->dev);
syncpt_op().read_wait_base(sp, id);
val = sp->base_val[id];
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return val;
}
/**
* Resets syncpoint and waitbase values to sw shadows
*/
void nvhost_syncpt_reset(struct nvhost_syncpt *sp)
{
u32 i;
BUG_ON(!(syncpt_op(sp).reset && syncpt_op(sp).reset_wait_base));
for (i = 0; i < sp->nb_pts; i++)
syncpt_op(sp).reset(sp, i);
for (i = 0; i < sp->nb_bases; i++)
syncpt_op(sp).reset_wait_base(sp, i);
wmb();
}
/**
* Updates the last value read from hardware.
*/
u32 nvhost_syncpt_update_min(struct nvhost_syncpt *sp, u32 id)
{
u32 val;
BUG_ON(!syncpt_op().update_min);
val = syncpt_op().update_min(sp, id);
trace_nvhost_syncpt_update_min(id, val);
return val;
}
/**
* Updates sw shadow state for client managed registers
*/
void nvhost_syncpt_save(struct nvhost_syncpt *sp)
{
u32 i;
for (i = 0; i < nvhost_syncpt_nb_pts(sp); i++) {
if (nvhost_syncpt_client_managed(sp, i))
syncpt_op().update_min(sp, i);
else
WARN_ON(!nvhost_syncpt_min_eq_max(sp, i));
}
for (i = 0; i < nvhost_syncpt_nb_bases(sp); i++)
syncpt_op().read_wait_base(sp, i);
}
/**
* Resets syncpoint and waitbase values of a
* single client to sw shadows
*/
void nvhost_syncpt_reset_client(struct platform_device *pdev)
{
struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
struct nvhost_master *nvhost_master = nvhost_get_host(pdev);
u32 id;
BUG_ON(!(syncpt_op().reset && syncpt_op().reset_wait_base));
for_each_set_bit(id, (unsigned long *)&pdata->syncpts, BITS_PER_LONG)
syncpt_op().reset(&nvhost_master->syncpt, id);
for_each_set_bit(id, (unsigned long *)&pdata->waitbases, BITS_PER_LONG)
syncpt_op().reset_wait_base(&nvhost_master->syncpt, id);
wmb();
}
/**
* Updates sw shadow state for client managed registers
*/
void nvhost_syncpt_save(struct nvhost_syncpt *sp)
{
u32 i;
BUG_ON(!(syncpt_op(sp).update_min && syncpt_op(sp).read_wait_base));
for (i = 0; i < sp->nb_pts; i++) {
if (client_managed(i))
syncpt_op(sp).update_min(sp, i);
else
BUG_ON(!nvhost_syncpt_min_eq_max(sp, i));
}
for (i = 0; i < sp->nb_bases; i++)
syncpt_op(sp).read_wait_base(sp, i);
}
void nvhost_syncpt_set_min_eq_max_ext(struct platform_device *dev, u32 id)
{
struct nvhost_master *master = nvhost_get_host(dev);
struct nvhost_syncpt *sp = &master->syncpt;
atomic_set(&sp->min_val[id], atomic_read(&sp->max_val[id]));
syncpt_op().reset(sp, id);
}
/**
* 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);
}
/**
* Resets syncpoint and waitbase values of a
* single client to sw shadows
*/
void nvhost_syncpt_reset_client(struct platform_device *pdev)
{
struct nvhost_device_data *pdata = platform_get_drvdata(pdev);
struct nvhost_master *nvhost_master = nvhost_get_host(pdev);
u32 id;
BUG_ON(!(syncpt_op().reset && syncpt_op().reset_wait_base));
for (id = 0; pdata->syncpts[id] &&
(id < NVHOST_MODULE_MAX_SYNCPTS); ++id)
syncpt_op().reset(&nvhost_master->syncpt, pdata->syncpts[id]);
for (id = 0; pdata->waitbases[id] &&
(id < NVHOST_MODULE_MAX_WAITBASES); ++id)
syncpt_op().reset_wait_base(&nvhost_master->syncpt,
pdata->waitbases[id]);
wmb();
}
void nvhost_syncpt_cpu_set_wait_base(struct platform_device *pdev, u32 id,
u32 val)
{
struct nvhost_syncpt *sp = &(nvhost_get_host(pdev)->syncpt);
sp->base_val[id] = val;
syncpt_op().reset_wait_base(sp, id);
wmb();
}
/* check for old WAITs to be removed (avoiding a wrap) */
int nvhost_syncpt_wait_check(struct nvhost_syncpt *sp,
struct nvmap_client *nvmap,
u32 waitchk_mask,
struct nvhost_waitchk *wait,
int num_waitchk)
{
return syncpt_op(sp).wait_check(sp, nvmap,
waitchk_mask, wait, num_waitchk);
}
/**
* Return current syncpoint value on success
*/
int nvhost_syncpt_read_check(struct nvhost_syncpt *sp, u32 id, u32 *val)
{
if (nvhost_module_busy(syncpt_to_dev(sp)->dev))
return -EINVAL;
*val = syncpt_op().update_min(sp, id);
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return 0;
}
/**
* Updates the last value read from hardware.
*/
u32 nvhost_syncpt_update_min(struct nvhost_syncpt *sp, u32 id)
{
u32 val;
nvhost_module_busy(syncpt_to_dev(sp)->dev);
val = syncpt_op().update_min(sp, id);
nvhost_module_idle(syncpt_to_dev(sp)->dev);
trace_nvhost_syncpt_update_min(id, val);
return val;
}
/**
* Get the current syncpoint value
*/
u32 nvhost_syncpt_read(struct nvhost_syncpt *sp, u32 id)
{
u32 val = 0xffffffff;
int err;
err = nvhost_module_busy(syncpt_to_dev(sp)->dev);
if (err)
return val;
val = syncpt_op().update_min(sp, id);
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return val;
}
/* 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;
}
/**
* Get the current syncpoint base
*/
u32 nvhost_syncpt_read_wait_base(struct nvhost_syncpt *sp, u32 id)
{
u32 val = 0xffffffff;
int err;
err = nvhost_module_busy(syncpt_to_dev(sp)->dev);
if (err)
return val;
syncpt_op().read_wait_base(sp, id);
val = sp->base_val[id];
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return val;
}
int nvhost_mutex_try_lock(struct nvhost_syncpt *sp, int idx)
{
struct nvhost_master *host = syncpt_to_dev(sp);
u32 reg;
nvhost_module_busy(host->dev);
reg = syncpt_op().mutex_try_lock(sp, idx);
if (reg) {
nvhost_module_idle(host->dev);
return -EBUSY;
}
atomic_inc(&sp->lock_counts[idx]);
return 0;
}
/*
* 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;
}
void nvhost_syncpt_patch_check(struct nvhost_syncpt *sp)
{
/* reset syncpoint value back to 0 */
atomic_set(&sp->min_val[0], 0);
syncpt_op().reset(sp, 0);
}
/* remove a wait pointed to by patch_addr */
int nvhost_syncpt_patch_wait(struct nvhost_syncpt *sp, void *patch_addr)
{
return syncpt_op().patch_wait(sp, patch_addr);
}
void nvhost_mutex_unlock(struct nvhost_syncpt *sp, int idx)
{
syncpt_op().mutex_unlock(sp, idx);
nvhost_module_idle(syncpt_to_dev(sp)->dev);
atomic_dec(&sp->lock_counts[idx]);
}
void nvhost_syncpt_debug(struct nvhost_syncpt *sp)
{
syncpt_op().debug(sp);
}
/**
* 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;
}
/**
* Write a cpu syncpoint increment to the hardware, without touching
* the cache. Caller is responsible for host being powered.
*/
void nvhost_syncpt_cpu_incr(struct nvhost_syncpt *sp, u32 id)
{
BUG_ON(!syncpt_op().cpu_incr);
syncpt_op().cpu_incr(sp, id);
}
void nvhost_syncpt_set_min_eq_max(struct nvhost_syncpt *sp, u32 id)
{
atomic_set(&sp->min_val[id], atomic_read(&sp->max_val[id]));
syncpt_op().reset(sp, id);
}
/**
* 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;
static int print_once = 0;
if (value)
*value = 0;
BUG_ON(!syncpt_op(sp).update_min);
if (!nvhost_syncpt_check_max(sp, id, thresh)) {
dev_warn(&syncpt_to_dev(sp)->pdev->dev,
"wait %d (%s) for (%d) wouldn't be met (max %d)\n",
id, syncpt_op(sp).name(sp, id), thresh,
nvhost_syncpt_read_max(sp, id));
nvhost_debug_dump(syncpt_to_dev(sp));
return -EINVAL;
}
/* first check cache */
if (nvhost_syncpt_min_cmp(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);
if (client_managed(id) || !nvhost_syncpt_min_eq_max(sp, id)) {
/* try to read from register */
u32 val = syncpt_op(sp).update_min(sp, id);
if ((s32)(val - thresh) >= 0) {
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;
/* 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,
nvhost_syncpt_min_cmp(sp, id, thresh),
check);
if (remain > 0 || nvhost_syncpt_min_cmp(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) {
if (timeout < SYNCPT_CHECK_PERIOD) {
/* Caller-specified timeout may be impractically low */
low_timeout = timeout;
}
timeout -= check;
}
if (timeout) {
dev_warn(&syncpt_to_dev(sp)->pdev->dev,
"%s: syncpoint id %d (%s) stuck waiting %d, timeout=%d\n",
current->comm, id, syncpt_op(sp).name(sp, id),
thresh, timeout);
syncpt_op(sp).debug(sp);
print_once++;
if (print_once == 1)
{
nvhost_debug_dump(syncpt_to_dev(sp));
debug_stuck_syncpoint();
}
if (check_count > MAX_STUCK_CHECK_COUNT) {
if (low_timeout) {
dev_warn(&syncpt_to_dev(sp)->pdev->dev,
"is timeout %d too low?\n",
low_timeout);
}
nvhost_debug_dump(syncpt_to_dev(sp));
BUG();
}
check_count++;
}
}
nvhost_intr_put_ref(&(syncpt_to_dev(sp)->intr), ref);
done:
nvhost_module_idle(syncpt_to_dev(sp)->dev);
return err;
}
/**
* Updates the last value read from hardware.
*/
u32 nvhost_syncpt_update_min(struct nvhost_syncpt *sp, u32 id)
{
BUG_ON(!syncpt_op(sp).update_min);
return syncpt_op(sp).update_min(sp, id);
}
/**
* Write a cpu syncpoint increment to the hardware, without touching
* the cache. Caller is responsible for host being powered.
*/
void nvhost_syncpt_cpu_incr(struct nvhost_syncpt *sp, u32 id)
{
syncpt_op().cpu_incr(sp, id);
}
