[PATCH 01/11] dma-buf: make fence sequence numbers 64 bit v2

[Chunming Zhou]

From: Christian König <***@gmail.com>

For a lot of use cases we need 64bit sequence numbers. Currently drivers
overload the dma_fence structure to store the additional bits.

Stop doing that and make the sequence number in the dma_fence always
64bit.

For compatibility with hardware which can do only 32bit sequences the
comparisons in __dma_fence_is_later only takes the lower 32bits as significant
when the upper 32bits are all zero.

v2: change the logic in __dma_fence_is_later

Signed-off-by: Christian König <***@amd.com>
---
drivers/dma-buf/dma-fence.c | 2 +-
drivers/dma-buf/sw_sync.c | 2 +-
drivers/dma-buf/sync_file.c | 4 ++--
drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c | 2 +-
drivers/gpu/drm/i915/i915_sw_fence.c | 2 +-
drivers/gpu/drm/i915/intel_engine_cs.c | 2 +-
drivers/gpu/drm/vgem/vgem_fence.c | 4 ++--
include/linux/dma-fence.h | 22 +++++++++++++++-------
8 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 136ec04d683f..3aa8733f832a 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -649,7 +649,7 @@ EXPORT_SYMBOL(dma_fence_wait_any_timeout);
*/
void
dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops,
- spinlock_t *lock, u64 context, unsigned seqno)
+ spinlock_t *lock, u64 context, u64 seqno)
{
BUG_ON(!lock);
BUG_ON(!ops || !ops->get_driver_name || !ops->get_timeline_name);
diff --git a/drivers/dma-buf/sw_sync.c b/drivers/dma-buf/sw_sync.c
index 53c1d6d36a64..32dcf7b4c935 100644
--- a/drivers/dma-buf/sw_sync.c
+++ b/drivers/dma-buf/sw_sync.c
@@ -172,7 +172,7 @@ static bool timeline_fence_enable_signaling(struct dma_fence *fence)
static void timeline_fence_value_str(struct dma_fence *fence,
char *str, int size)
{
- snprintf(str, size, "%d", fence->seqno);
+ snprintf(str, size, "%lld", fence->seqno);
}

static void timeline_fence_timeline_value_str(struct dma_fence *fence,
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index 35dd06479867..4f6305ca52c8 100644
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -144,7 +144,7 @@ char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len)
} else {
struct dma_fence *fence = sync_file->fence;

- snprintf(buf, len, "%s-%s%llu-%d",
+ snprintf(buf, len, "%s-%s%llu-%lld",
fence->ops->get_driver_name(fence),
fence->ops->get_timeline_name(fence),
fence->context,
@@ -258,7 +258,7 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,

i_b++;
} else {
- if (pt_a->seqno - pt_b->seqno <= INT_MAX)
+ if (__dma_fence_is_later(pt_a->seqno, pt_b->seqno))
add_fence(fences, &i, pt_a);
else
add_fence(fences, &i, pt_b);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
index 12f2bf97611f..bfaf5c6323be 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
@@ -388,7 +388,7 @@ void amdgpu_sa_bo_dump_debug_info(struct amdgpu_sa_manager *sa_manager,
soffset, eoffset, eoffset - soffset);

if (i->fence)
- seq_printf(m, " protected by 0x%08x on context %llu",
+ seq_printf(m, " protected by 0x%016llx on context %llu",
i->fence->seqno, i->fence->context);

seq_printf(m, "\n");
diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c b/drivers/gpu/drm/i915/i915_sw_fence.c
index 6dbeed079ae5..11bcdabd5177 100644
--- a/drivers/gpu/drm/i915/i915_sw_fence.c
+++ b/drivers/gpu/drm/i915/i915_sw_fence.c
@@ -393,7 +393,7 @@ static void timer_i915_sw_fence_wake(struct timer_list *t)
if (!fence)
return;

- pr_notice("Asynchronous wait on fence %s:%s:%x timed out (hint:%pS)\n",
+ pr_notice("Asynchronous wait on fence %s:%s:%llx timed out (hint:%pS)\n",
cb->dma->ops->get_driver_name(cb->dma),
cb->dma->ops->get_timeline_name(cb->dma),
cb->dma->seqno,
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 759c0fd58f8c..dfafa79171df 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1239,7 +1239,7 @@ static void print_request(struct drm_printer *m,

x = print_sched_attr(rq->i915, &rq->sched.attr, buf, x, sizeof(buf));

- drm_printf(m, "%s%x%s [%llx:%x]%s @ %dms: %s\n",
+ drm_printf(m, "%s%x%s [%llx:%llx]%s @ %dms: %s\n",
prefix,
rq->global_seqno,
i915_request_completed(rq) ? "!" : "",
diff --git a/drivers/gpu/drm/vgem/vgem_fence.c b/drivers/gpu/drm/vgem/vgem_fence.c
index c1c420afe2dd..eb17c0cd3727 100644
--- a/drivers/gpu/drm/vgem/vgem_fence.c
+++ b/drivers/gpu/drm/vgem/vgem_fence.c
@@ -53,13 +53,13 @@ static void vgem_fence_release(struct dma_fence *base)

static void vgem_fence_value_str(struct dma_fence *fence, char *str, int size)
{
- snprintf(str, size, "%u", fence->seqno);
+ snprintf(str, size, "%llu", fence->seqno);
}

static void vgem_fence_timeline_value_str(struct dma_fence *fence, char *str,
int size)
{
- snprintf(str, size, "%u",
+ snprintf(str, size, "%llu",
dma_fence_is_signaled(fence) ? fence->seqno : 0);
}

diff --git a/include/linux/dma-fence.h b/include/linux/dma-fence.h
index 999e4b104410..6b788467b2e3 100644
--- a/include/linux/dma-fence.h
+++ b/include/linux/dma-fence.h
@@ -77,7 +77,7 @@ struct dma_fence {
struct list_head cb_list;
spinlock_t *lock;
u64 context;
- unsigned seqno;
+ u64 seqno;
unsigned long flags;
ktime_t timestamp;
int error;
@@ -244,7 +244,7 @@ struct dma_fence_ops {
};

void dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops,
- spinlock_t *lock, u64 context, unsigned seqno);
+ spinlock_t *lock, u64 context, u64 seqno);

void dma_fence_release(struct kref *kref);
void dma_fence_free(struct dma_fence *fence);
@@ -414,9 +414,17 @@ dma_fence_is_signaled(struct dma_fence *fence)
* Returns true if f1 is chronologically later than f2. Both fences must be
* from the same context, since a seqno is not common across contexts.
*/
-static inline bool __dma_fence_is_later(u32 f1, u32 f2)
+static inline bool __dma_fence_is_later(u64 f1, u64 f2)
{
- return (int)(f1 - f2) > 0;
+ /* This is for backward compatibility with drivers which can only handle
+ * 32bit sequence numbers. Use a 64bit compare when any of the higher
+ * bits are none zero, otherwise use a 32bit compare with wrap around
+ * handling.
+ */
+ if (upper_32_bits(f1) || upper_32_bits(f2))
+ return f1 > f2;
+
+ return (int)(lower_32_bits(f1) - lower_32_bits(f2)) > 0;
}

/**
@@ -548,21 +556,21 @@ u64 dma_fence_context_alloc(unsigned num);
do { \
struct dma_fence *__ff = (f); \
if (IS_ENABLED(CONFIG_DMA_FENCE_TRACE)) \
- pr_info("f %llu#%u: " fmt, \
+ pr_info("f %llu#%llu: " fmt, \
__ff->context, __ff->seqno, ##args); \
} while (0)

#define DMA_FENCE_WARN(f, fmt, args...) \
do { \
struct dma_fence *__ff = (f); \
- pr_warn("f %llu#%u: " fmt, __ff->context, __ff->seqno, \
+ pr_warn("f %llu#%llu: " fmt, __ff->context, __ff->seqno,\
##args); \
} while (0)

#define DMA_FENCE_ERR(f, fmt, args...) \
do { \
struct dma_fence *__ff = (f); \
- pr_err("f %llu#%u: " fmt, __ff->context, __ff->seqno, \
+ pr_err("f %llu#%llu: " fmt, __ff->context, __ff->seqno, \
##args); \
} while (0)

[Chunming Zhou]

From: Christian König <***@gmail.com>

Lockless container implementation similar to a dma_fence_array, but with
only two elements per node and automatic garbage collection.

v2: properly document dma_fence_chain_for_each, add dma_fence_chain_find_seqno,
drop prev reference during garbage collection if it's not a chain fence.
v3: use head and iterator for dma_fence_chain_for_each
v4: fix reference count in dma_fence_chain_enable_signaling

Signed-off-by: Christian König <***@amd.com>
---
drivers/dma-buf/Makefile | 3 +-
drivers/dma-buf/dma-fence-chain.c | 241 ++++++++++++++++++++++++++++++
include/linux/dma-fence-chain.h | 81 ++++++++++
3 files changed, 324 insertions(+), 1 deletion(-)
create mode 100644 drivers/dma-buf/dma-fence-chain.c
create mode 100644 include/linux/dma-fence-chain.h

diff --git a/drivers/dma-buf/Makefile b/drivers/dma-buf/Makefile
index 0913a6ccab5a..1f006e083eb9 100644
--- a/drivers/dma-buf/Makefile
+++ b/drivers/dma-buf/Makefile
@@ -1,4 +1,5 @@
-obj-y := dma-buf.o dma-fence.o dma-fence-array.o reservation.o seqno-fence.o
+obj-y := dma-buf.o dma-fence.o dma-fence-array.o dma-fence-chain.o \
+ reservation.o seqno-fence.o
obj-$(CONFIG_SYNC_FILE) += sync_file.o
obj-$(CONFIG_SW_SYNC) += sw_sync.o sync_debug.o
obj-$(CONFIG_UDMABUF) += udmabuf.o
diff --git a/drivers/dma-buf/dma-fence-chain.c b/drivers/dma-buf/dma-fence-chain.c
new file mode 100644
index 000000000000..0c5e3c902fa0
--- /dev/null
+++ b/drivers/dma-buf/dma-fence-chain.c
@@ -0,0 +1,241 @@
+/*
+ * fence-chain: chain fences together in a timeline
+ *
+ * Copyright (C) 2018 Advanced Micro Devices, Inc.
+ * Authors:
+ * Christian König <***@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/dma-fence-chain.h>
+
+static bool dma_fence_chain_enable_signaling(struct dma_fence *fence);
+
+/**
+ * dma_fence_chain_get_prev - use RCU to get a reference to the previous fence
+ * @chain: chain node to get the previous node from
+ *
+ * Use dma_fence_get_rcu_safe to get a reference to the previous fence of the
+ * chain node.
+ */
+static struct dma_fence *dma_fence_chain_get_prev(struct dma_fence_chain *chain)
+{
+ struct dma_fence *prev;
+
+ rcu_read_lock();
+ prev = dma_fence_get_rcu_safe(&chain->prev);
+ rcu_read_unlock();
+ return prev;
+}
+
+/**
+ * dma_fence_chain_walk - chain walking function
+ * @fence: current chain node
+ *
+ * Walk the chain to the next node. Returns the next fence or NULL if we are at
+ * the end of the chain. Garbage collects chain nodes which are already
+ * signaled.
+ */
+struct dma_fence *dma_fence_chain_walk(struct dma_fence *fence)
+{
+ struct dma_fence_chain *chain, *prev_chain;
+ struct dma_fence *prev, *replacement, *tmp;
+
+ chain = to_dma_fence_chain(fence);
+ if (!chain) {
+ dma_fence_put(fence);
+ return NULL;
+ }
+
+ while ((prev = dma_fence_chain_get_prev(chain))) {
+
+ prev_chain = to_dma_fence_chain(prev);
+ if (prev_chain) {
+ if (!dma_fence_is_signaled(prev_chain->fence))
+ break;
+
+ replacement = dma_fence_chain_get_prev(prev_chain);
+ } else {
+ if (!dma_fence_is_signaled(prev))
+ break;
+
+ replacement = NULL;
+ }
+
+ tmp = cmpxchg(&chain->prev, prev, replacement);
+ if (tmp == prev)
+ dma_fence_put(tmp);
+ else
+ dma_fence_put(replacement);
+ dma_fence_put(prev);
+ }
+
+ dma_fence_put(fence);
+ return prev;
+}
+EXPORT_SYMBOL(dma_fence_chain_walk);
+
+/**
+ * dma_fence_chain_find_seqno - find fence chain node by seqno
+ * @pfence: pointer to the chain node where to start
+ * @seqno: the sequence number to search for
+ *
+ * Advance the fence pointer to the chain node which will signal this sequence
+ * number. If no sequence number is provided then this is a no-op.
+ *
+ * Returns EINVAL if the fence is not a chain node or the sequence number has
+ * not yet advanced far enough.
+ */
+int dma_fence_chain_find_seqno(struct dma_fence **pfence, uint64_t seqno)
+{
+ struct dma_fence_chain *chain;
+
+ if (!seqno)
+ return 0;
+
+ chain = to_dma_fence_chain(*pfence);
+ if (!chain || chain->base.seqno < seqno)
+ return -EINVAL;
+
+ dma_fence_chain_for_each(*pfence, &chain->base) {
+ if ((*pfence)->context != chain->base.context ||
+ to_dma_fence_chain(*pfence)->prev_seqno < seqno)
+ break;
+ }
+ dma_fence_put(&chain->base);
+
+ return 0;
+}
+EXPORT_SYMBOL(dma_fence_chain_find_seqno);
+
+static const char *dma_fence_chain_get_driver_name(struct dma_fence *fence)
+{
+ return "dma_fence_chain";
+}
+
+static const char *dma_fence_chain_get_timeline_name(struct dma_fence *fence)
+{
+ return "unbound";
+}
+
+static void dma_fence_chain_irq_work(struct irq_work *work)
+{
+ struct dma_fence_chain *chain;
+
+ chain = container_of(work, typeof(*chain), work);
+
+ /* Try to rearm the callback */
+ if (!dma_fence_chain_enable_signaling(&chain->base))
+ /* Ok, we are done. No more unsignaled fences left */
+ dma_fence_signal(&chain->base);
+ dma_fence_put(&chain->base);
+}
+
+static void dma_fence_chain_cb(struct dma_fence *f, struct dma_fence_cb *cb)
+{
+ struct dma_fence_chain *chain;
+
+ chain = container_of(cb, typeof(*chain), cb);
+ irq_work_queue(&chain->work);
+ dma_fence_put(f);
+}
+
+static bool dma_fence_chain_enable_signaling(struct dma_fence *fence)
+{
+ struct dma_fence_chain *head = to_dma_fence_chain(fence);
+
+ dma_fence_get(&head->base);
+ dma_fence_chain_for_each(fence, &head->base) {
+ struct dma_fence_chain *chain = to_dma_fence_chain(fence);
+ struct dma_fence *f = chain ? chain->fence : fence;
+
+ dma_fence_get(f);
+ if (!dma_fence_add_callback(f, &head->cb, dma_fence_chain_cb)) {
+ dma_fence_put(fence);
+ return true;
+ }
+ dma_fence_put(f);
+ }
+ dma_fence_put(&head->base);
+ return false;
+}
+
+static bool dma_fence_chain_signaled(struct dma_fence *fence)
+{
+ dma_fence_chain_for_each(fence, fence) {
+ struct dma_fence_chain *chain = to_dma_fence_chain(fence);
+ struct dma_fence *f = chain ? chain->fence : fence;
+
+ if (!dma_fence_is_signaled(f)) {
+ dma_fence_put(fence);
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static void dma_fence_chain_release(struct dma_fence *fence)
+{
+ struct dma_fence_chain *chain = to_dma_fence_chain(fence);
+
+ dma_fence_put(chain->prev);
+ dma_fence_put(chain->fence);
+ dma_fence_free(fence);
+}
+
+const struct dma_fence_ops dma_fence_chain_ops = {
+ .get_driver_name = dma_fence_chain_get_driver_name,
+ .get_timeline_name = dma_fence_chain_get_timeline_name,
+ .enable_signaling = dma_fence_chain_enable_signaling,
+ .signaled = dma_fence_chain_signaled,
+ .release = dma_fence_chain_release,
+};
+EXPORT_SYMBOL(dma_fence_chain_ops);
+
+/**
+ * dma_fence_chain_init - initialize a fence chain
+ * @chain: the chain node to initialize
+ * @prev: the previous fence
+ * @fence: the current fence
+ *
+ * Initialize a new chain node and either start a new chain or add the node to
+ * the existing chain of the previous fence.
+ */
+void dma_fence_chain_init(struct dma_fence_chain *chain,
+ struct dma_fence *prev,
+ struct dma_fence *fence,
+ uint64_t seqno)
+{
+ struct dma_fence_chain *prev_chain = to_dma_fence_chain(prev);
+ uint64_t context;
+
+ spin_lock_init(&chain->lock);
+ chain->prev = prev;
+ chain->fence = fence;
+ chain->prev_seqno = 0;
+ init_irq_work(&chain->work, dma_fence_chain_irq_work);
+
+ /* Try to reuse the context of the previous chain node. */
+ if (prev_chain && __dma_fence_is_later(seqno, prev->seqno)) {
+ context = prev->context;
+ chain->prev_seqno = prev->seqno;
+ } else {
+ context = dma_fence_context_alloc(1);
+ /* Make sure that we always have a valid sequence number. */
+ if (prev_chain)
+ seqno = max(prev->seqno, seqno);
+ }
+
+ dma_fence_init(&chain->base, &dma_fence_chain_ops,
+ &chain->lock, context, seqno);
+}
+EXPORT_SYMBOL(dma_fence_chain_init);
diff --git a/include/linux/dma-fence-chain.h b/include/linux/dma-fence-chain.h
new file mode 100644
index 000000000000..a5c2e8c6915c
--- /dev/null
+++ b/include/linux/dma-fence-chain.h
@@ -0,0 +1,81 @@
+/*
+ * fence-chain: chain fences together in a timeline
+ *
+ * Copyright (C) 2018 Advanced Micro Devices, Inc.
+ * Authors:
+ * Christian König <***@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __LINUX_DMA_FENCE_CHAIN_H
+#define __LINUX_DMA_FENCE_CHAIN_H
+
+#include <linux/dma-fence.h>
+#include <linux/irq_work.h>
+
+/**
+ * struct dma_fence_chain - fence to represent an node of a fence chain
+ * @base: fence base class
+ * @lock: spinlock for fence handling
+ * @prev: previous fence of the chain
+ * @prev_seqno: original previous seqno before garbage collection
+ * @fence: encapsulated fence
+ * @cb: callback structure for signaling
+ * @work: irq work item for signaling
+ */
+struct dma_fence_chain {
+ struct dma_fence base;
+ spinlock_t lock;
+ struct dma_fence *prev;
+ u64 prev_seqno;
+ struct dma_fence *fence;
+ struct dma_fence_cb cb;
+ struct irq_work work;
+};
+
+extern const struct dma_fence_ops dma_fence_chain_ops;
+
+/**
+ * to_dma_fence_chain - cast a fence to a dma_fence_chain
+ * @fence: fence to cast to a dma_fence_array
+ *
+ * Returns NULL if the fence is not a dma_fence_chain,
+ * or the dma_fence_chain otherwise.
+ */
+static inline struct dma_fence_chain *
+to_dma_fence_chain(struct dma_fence *fence)
+{
+ if (!fence || fence->ops != &dma_fence_chain_ops)
+ return NULL;
+
+ return container_of(fence, struct dma_fence_chain, base);
+}
+
+/**
+ * dma_fence_chain_for_each - iterate over all fences in chain
+ * @iter: current fence
+ * @head: starting point
+ *
+ * Iterate over all fences in the chain. We keep a reference to the current
+ * fence while inside the loop which must be dropped when breaking out.
+ */
+#define dma_fence_chain_for_each(iter, head) \
+ for (iter = dma_fence_get(head); iter; \
+ iter = dma_fence_chain_walk(head))
+
+struct dma_fence *dma_fence_chain_walk(struct dma_fence *fence);
+int dma_fence_chain_find_seqno(struct dma_fence **pfence, uint64_t seqno);
+void dma_fence_chain_init(struct dma_fence_chain *chain,
+ struct dma_fence *prev,
+ struct dma_fence *fence,
+ uint64_t seqno);
+
+#endif /* __LINUX_DMA_FENCE_CHAIN_H */

[Chunming Zhou]

From: Christian König <***@gmail.com>

This completes "drm/syncobj: Drop add/remove_callback from driver
interface" and cleans up the implementation a bit.

Signed-off-by: Christian König <***@amd.com>
---
drivers/gpu/drm/drm_syncobj.c | 91 ++++++++++++-----------------------
include/drm/drm_syncobj.h | 21 --------
2 files changed, 30 insertions(+), 82 deletions(-)

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index db30a0e89db8..e19525af0cce 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -56,6 +56,16 @@
#include "drm_internal.h"
#include <drm/drm_syncobj.h>

+struct syncobj_wait_entry {
+ struct list_head node;
+ struct task_struct *task;
+ struct dma_fence *fence;
+ struct dma_fence_cb fence_cb;
+};
+
+static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
+ struct syncobj_wait_entry *wait);
+
/**
* drm_syncobj_find - lookup and reference a sync object.
* @file_private: drm file private pointer
@@ -82,58 +92,33 @@ struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
}
EXPORT_SYMBOL(drm_syncobj_find);

-static void drm_syncobj_add_callback_locked(struct drm_syncobj *syncobj,
- struct drm_syncobj_cb *cb,
- drm_syncobj_func_t func)
+static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
+ struct syncobj_wait_entry *wait)
{
- cb->func = func;
- list_add_tail(&cb->node, &syncobj->cb_list);
-}
-
-static int drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj,
- struct dma_fence **fence,
- struct drm_syncobj_cb *cb,
- drm_syncobj_func_t func)
-{
- int ret;
-
- *fence = drm_syncobj_fence_get(syncobj);
- if (*fence)
- return 1;
+ if (wait->fence)
+ return;

spin_lock(&syncobj->lock);
/* We've already tried once to get a fence and failed. Now that we
* have the lock, try one more time just to be sure we don't add a
* callback when a fence has already been set.
*/
- if (syncobj->fence) {
- *fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
- lockdep_is_held(&syncobj->lock)));
- ret = 1;
- } else {
- *fence = NULL;
- drm_syncobj_add_callback_locked(syncobj, cb, func);
- ret = 0;
- }
+ if (syncobj->fence)
+ wait->fence = dma_fence_get(
+ rcu_dereference_protected(syncobj->fence, 1));
+ else
+ list_add_tail(&wait->node, &syncobj->cb_list);
spin_unlock(&syncobj->lock);
-
- return ret;
}

-void drm_syncobj_add_callback(struct drm_syncobj *syncobj,
- struct drm_syncobj_cb *cb,
- drm_syncobj_func_t func)
+static void drm_syncobj_remove_wait(struct drm_syncobj *syncobj,
+ struct syncobj_wait_entry *wait)
{
- spin_lock(&syncobj->lock);
- drm_syncobj_add_callback_locked(syncobj, cb, func);
- spin_unlock(&syncobj->lock);
-}
+ if (!wait->node.next)
+ return;

-void drm_syncobj_remove_callback(struct drm_syncobj *syncobj,
- struct drm_syncobj_cb *cb)
-{
spin_lock(&syncobj->lock);
- list_del_init(&cb->node);
+ list_del_init(&wait->node);
spin_unlock(&syncobj->lock);
}

@@ -148,7 +133,7 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
struct dma_fence *fence)
{
struct dma_fence *old_fence;
- struct drm_syncobj_cb *cur, *tmp;
+ struct syncobj_wait_entry *cur, *tmp;

if (fence)
dma_fence_get(fence);
@@ -162,7 +147,7 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
if (fence != old_fence) {
list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
list_del_init(&cur->node);
- cur->func(syncobj, cur);
+ syncobj_wait_syncobj_func(syncobj, cur);
}
}

@@ -608,13 +593,6 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
&args->handle);
}

-struct syncobj_wait_entry {
- struct task_struct *task;
- struct dma_fence *fence;
- struct dma_fence_cb fence_cb;
- struct drm_syncobj_cb syncobj_cb;
-};
-
static void syncobj_wait_fence_func(struct dma_fence *fence,
struct dma_fence_cb *cb)
{
@@ -625,11 +603,8 @@ static void syncobj_wait_fence_func(struct dma_fence *fence,
}

static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
- struct drm_syncobj_cb *cb)
+ struct syncobj_wait_entry *wait)
{
- struct syncobj_wait_entry *wait =
- container_of(cb, struct syncobj_wait_entry, syncobj_cb);
-
/* This happens inside the syncobj lock */
wait->fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
lockdep_is_held(&syncobj->lock)));
@@ -688,12 +663,8 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
*/

if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
- for (i = 0; i < count; ++i) {
- drm_syncobj_fence_get_or_add_callback(syncobjs[i],
- &entries[i].fence,
- &entries[i].syncobj_cb,
- syncobj_wait_syncobj_func);
- }
+ for (i = 0; i < count; ++i)
+ drm_syncobj_fence_add_wait(syncobjs[i], &entries[i]);
}

do {
@@ -742,9 +713,7 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,

cleanup_entries:
for (i = 0; i < count; ++i) {
- if (entries[i].syncobj_cb.func)
- drm_syncobj_remove_callback(syncobjs[i],
- &entries[i].syncobj_cb);
+ drm_syncobj_remove_wait(syncobjs[i], &entries[i]);
if (entries[i].fence_cb.func)
dma_fence_remove_callback(entries[i].fence,
&entries[i].fence_cb);
diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h
index b1fe921f8e8f..7c6ed845c70d 100644
--- a/include/drm/drm_syncobj.h
+++ b/include/drm/drm_syncobj.h
@@ -28,8 +28,6 @@

#include "linux/dma-fence.h"

-struct drm_syncobj_cb;
-
/**
* struct drm_syncobj - sync object.
*
@@ -62,25 +60,6 @@ struct drm_syncobj {
struct file *file;
};

-typedef void (*drm_syncobj_func_t)(struct drm_syncobj *syncobj,
- struct drm_syncobj_cb *cb);
-
-/**
- * struct drm_syncobj_cb - callback for drm_syncobj_add_callback
- * @node: used by drm_syncob_add_callback to append this struct to
- * &drm_syncobj.cb_list
- * @func: drm_syncobj_func_t to call
- *
- * This struct will be initialized by drm_syncobj_add_callback, additional
- * data can be passed along by embedding drm_syncobj_cb in another struct.
- * The callback will get called the next time drm_syncobj_replace_fence is
- * called.
- */
-struct drm_syncobj_cb {
- struct list_head node;
- drm_syncobj_func_t func;
-};
-
void drm_syncobj_free(struct kref *kref);

/**

[Chunming Zhou]

From: Christian König <***@gmail.com>

Use the dma_fence_chain object to create a timeline of fence objects
instead of just replacing the existing fence.

v2: rebase and cleanup

Signed-off-by: Christian König <***@amd.com>
---
drivers/gpu/drm/drm_syncobj.c | 37 +++++++++++++++++++++++++++++++++++
include/drm/drm_syncobj.h | 5 +++++
2 files changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index e19525af0cce..51f798e2194f 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -122,6 +122,43 @@ static void drm_syncobj_remove_wait(struct drm_syncobj *syncobj,
spin_unlock(&syncobj->lock);
}

+/**
+ * drm_syncobj_add_point - add new timeline point to the syncobj
+ * @syncobj: sync object to add timeline point do
+ * @chain: chain node to use to add the point
+ * @fence: fence to encapsulate in the chain node
+ * @point: sequence number to use for the point
+ *
+ * Add the chain node as new timeline point to the syncobj.
+ */
+void drm_syncobj_add_point(struct drm_syncobj *syncobj,
+ struct dma_fence_chain *chain,
+ struct dma_fence *fence,
+ uint64_t point)
+{
+ struct syncobj_wait_entry *cur, *tmp;
+ struct dma_fence *prev;
+
+ dma_fence_get(fence);
+
+ spin_lock(&syncobj->lock);
+
+ prev = rcu_dereference_protected(syncobj->fence,
+ lockdep_is_held(&syncobj->lock));
+ dma_fence_chain_init(chain, prev, fence, point);
+ rcu_assign_pointer(syncobj->fence, &chain->base);
+
+ list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
+ list_del_init(&cur->node);
+ syncobj_wait_syncobj_func(syncobj, cur);
+ }
+ spin_unlock(&syncobj->lock);
+
+ /* Walk the chain once to trigger garbage collection */
+ dma_fence_chain_for_each(prev, fence);
+}
+EXPORT_SYMBOL(drm_syncobj_add_point);
+
/**
* drm_syncobj_replace_fence - replace fence in a sync object.
* @syncobj: Sync object to replace fence in
diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h
index 7c6ed845c70d..8acb4ae4f311 100644
--- a/include/drm/drm_syncobj.h
+++ b/include/drm/drm_syncobj.h
@@ -27,6 +27,7 @@
#define __DRM_SYNCOBJ_H__

#include "linux/dma-fence.h"
+#include "linux/dma-fence-chain.h"

/**
* struct drm_syncobj - sync object.
@@ -110,6 +111,10 @@ drm_syncobj_fence_get(struct drm_syncobj *syncobj)

struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
u32 handle);
+void drm_syncobj_add_point(struct drm_syncobj *syncobj,
+ struct dma_fence_chain *chain,
+ struct dma_fence *fence,
+ uint64_t point);
void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
struct dma_fence *fence);
int drm_syncobj_find_fence(struct drm_file *file_private,

[Chunming Zhou]

points array is one-to-one match with syncobjs array.
v2:
add seperate ioctl for timeline point wait, otherwise break uapi.
v3:
userspace can specify two kinds waits::
a. Wait for time point to be completed.
b. and wait for time point to become available
v4:
rebase
v5:
add comment for xxx_WAIT_AVAILABLE
v6: rebase and rework on new container
v7: drop _WAIT_COMPLETED, it is the default anyway
v8: correctly handle garbage collected fences

Signed-off-by: Chunming Zhou <***@amd.com>
Signed-off-by: Christian König <***@amd.com>
Cc: Daniel Rakos <***@amd.com>
Cc: Jason Ekstrand <***@jlekstrand.net>
Cc: Bas Nieuwenhuizen <***@basnieuwenhuizen.nl>
Cc: Dave Airlie <***@redhat.com>
Cc: Chris Wilson <***@chris-wilson.co.uk>
---
drivers/gpu/drm/drm_internal.h | 2 +
drivers/gpu/drm/drm_ioctl.c | 2 +
drivers/gpu/drm/drm_syncobj.c | 153 ++++++++++++++++++++++++++-------
include/uapi/drm/drm.h | 15 ++++
4 files changed, 143 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index c7a7d7ce5d1c..18b41e10195c 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -178,6 +178,8 @@ int drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
+int drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 94bd872d56c4..a9a17ed35cc4 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -675,6 +675,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_WAIT, drm_syncobj_wait_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, drm_syncobj_timeline_wait_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_RESET, drm_syncobj_reset_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 51f798e2194f..348079bb0965 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -61,6 +61,7 @@ struct syncobj_wait_entry {
struct task_struct *task;
struct dma_fence *fence;
struct dma_fence_cb fence_cb;
+ u64 point;
};

static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
@@ -95,6 +96,8 @@ EXPORT_SYMBOL(drm_syncobj_find);
static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait)
{
+ struct dma_fence *fence;
+
if (wait->fence)
return;

@@ -103,11 +106,15 @@ static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj,
* have the lock, try one more time just to be sure we don't add a
* callback when a fence has already been set.
*/
- if (syncobj->fence)
- wait->fence = dma_fence_get(
- rcu_dereference_protected(syncobj->fence, 1));
- else
+ fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1));
+ if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
+ dma_fence_put(fence);
list_add_tail(&wait->node, &syncobj->cb_list);
+ } else if (!fence) {
+ wait->fence = dma_fence_get_stub();
+ } else {
+ wait->fence = fence;
+ }
spin_unlock(&syncobj->lock);
}

@@ -148,10 +155,8 @@ void drm_syncobj_add_point(struct drm_syncobj *syncobj,
dma_fence_chain_init(chain, prev, fence, point);
rcu_assign_pointer(syncobj->fence, &chain->base);

- list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
- list_del_init(&cur->node);
+ list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
syncobj_wait_syncobj_func(syncobj, cur);
- }
spin_unlock(&syncobj->lock);

/* Walk the chain once to trigger garbage collection */
@@ -182,10 +187,8 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
rcu_assign_pointer(syncobj->fence, fence);

if (fence != old_fence) {
- list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) {
- list_del_init(&cur->node);
+ list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
syncobj_wait_syncobj_func(syncobj, cur);
- }
}

spin_unlock(&syncobj->lock);
@@ -642,13 +645,27 @@ static void syncobj_wait_fence_func(struct dma_fence *fence,
static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
struct syncobj_wait_entry *wait)
{
+ struct dma_fence *fence;
+
/* This happens inside the syncobj lock */
- wait->fence = dma_fence_get(rcu_dereference_protected(syncobj->fence,
- lockdep_is_held(&syncobj->lock)));
+ fence = rcu_dereference_protected(syncobj->fence,
+ lockdep_is_held(&syncobj->lock));
+ dma_fence_get(fence);
+ if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) {
+ dma_fence_put(fence);
+ return;
+ } else if (!fence) {
+ wait->fence = dma_fence_get_stub();
+ } else {
+ wait->fence = fence;
+ }
+
wake_up_process(wait->task);
+ list_del_init(&wait->node);
}

static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
+ void __user *user_points,
uint32_t count,
uint32_t flags,
signed long timeout,
@@ -656,12 +673,27 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
{
struct syncobj_wait_entry *entries;
struct dma_fence *fence;
+ uint64_t *points;
uint32_t signaled_count, i;

- entries = kcalloc(count, sizeof(*entries), GFP_KERNEL);
- if (!entries)
+ points = kmalloc_array(count, sizeof(*points), GFP_KERNEL);
+ if (points == NULL)
return -ENOMEM;

+ if (!user_points) {
+ memset(points, 0, count * sizeof(uint64_t));
+
+ } else if (copy_from_user(points, user_points,
+ sizeof(uint64_t) * count)) {
+ timeout = -EFAULT;
+ goto err_free_points;
+ }
+
+ entries = kcalloc(count, sizeof(*entries), GFP_KERNEL);
+ if (!entries) {
+ timeout = -ENOMEM;
+ goto err_free_points;
+ }
/* Walk the list of sync objects and initialize entries. We do
* this up-front so that we can properly return -EINVAL if there is
* a syncobj with a missing fence and then never have the chance of
@@ -669,9 +701,13 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
*/
signaled_count = 0;
for (i = 0; i < count; ++i) {
+ struct dma_fence *fence;
+
entries[i].task = current;
- entries[i].fence = drm_syncobj_fence_get(syncobjs[i]);
- if (!entries[i].fence) {
+ entries[i].point = points[i];
+ fence = drm_syncobj_fence_get(syncobjs[i]);
+ if (!fence || dma_fence_chain_find_seqno(&fence, points[i])) {
+ dma_fence_put(fence);
if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
continue;
} else {
@@ -680,7 +716,13 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
}
}

- if (dma_fence_is_signaled(entries[i].fence)) {
+ if (fence)
+ entries[i].fence = fence;
+ else
+ entries[i].fence = dma_fence_get_stub();
+
+ if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
+ dma_fence_is_signaled(entries[i].fence)) {
if (signaled_count == 0 && idx)
*idx = i;
signaled_count++;
@@ -713,7 +755,8 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
if (!fence)
continue;

- if (dma_fence_is_signaled(fence) ||
+ if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) ||
+ dma_fence_is_signaled(fence) ||
(!entries[i].fence_cb.func &&
dma_fence_add_callback(fence,
&entries[i].fence_cb,
@@ -758,6 +801,9 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
}
kfree(entries);

+err_free_points:
+ kfree(points);
+
return timeout;
}

@@ -796,19 +842,33 @@ static signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec)
static int drm_syncobj_array_wait(struct drm_device *dev,
struct drm_file *file_private,
struct drm_syncobj_wait *wait,
- struct drm_syncobj **syncobjs)
+ struct drm_syncobj_timeline_wait *timeline_wait,
+ struct drm_syncobj **syncobjs, bool timeline)
{
- signed long timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);
+ signed long timeout = 0;
uint32_t first = ~0;

- timeout = drm_syncobj_array_wait_timeout(syncobjs,
- wait->count_handles,
- wait->flags,
- timeout, &first);
- if (timeout < 0)
- return timeout;
-
- wait->first_signaled = first;
+ if (!timeline) {
+ timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec);
+ timeout = drm_syncobj_array_wait_timeout(syncobjs,
+ NULL,
+ wait->count_handles,
+ wait->flags,
+ timeout, &first);
+ if (timeout < 0)
+ return timeout;
+ wait->first_signaled = first;
+ } else {
+ timeout = drm_timeout_abs_to_jiffies(timeline_wait->timeout_nsec);
+ timeout = drm_syncobj_array_wait_timeout(syncobjs,
+ u64_to_user_ptr(timeline_wait->points),
+ timeline_wait->count_handles,
+ timeline_wait->flags,
+ timeout, &first);
+ if (timeout < 0)
+ return timeout;
+ timeline_wait->first_signaled = first;
+ }
return 0;
}

@@ -894,13 +954,48 @@ drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
return ret;

ret = drm_syncobj_array_wait(dev, file_private,
- args, syncobjs);
+ args, NULL, syncobjs, false);

drm_syncobj_array_free(syncobjs, args->count_handles);

return ret;
}

+int
+drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_timeline_wait *args = data;
+ struct drm_syncobj **syncobjs;
+ int ret = 0;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -ENODEV;
+
+ if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL |
+ DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
+ DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE))
+ return -EINVAL;
+
+ if (args->count_handles == 0)
+ return -EINVAL;
+
+ ret = drm_syncobj_array_find(file_private,
+ u64_to_user_ptr(args->handles),
+ args->count_handles,
+ &syncobjs);
+ if (ret < 0)
+ return ret;
+
+ ret = drm_syncobj_array_wait(dev, file_private,
+ NULL, args, syncobjs, true);
+
+ drm_syncobj_array_free(syncobjs, args->count_handles);
+
+ return ret;
+}
+
+
int
drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private)
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 300f336633f2..0092111d002c 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -737,6 +737,7 @@ struct drm_syncobj_handle {

#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 << 0)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 << 1)
+#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE (1 << 2)
struct drm_syncobj_wait {
__u64 handles;
/* absolute timeout */
@@ -747,6 +748,19 @@ struct drm_syncobj_wait {
__u32 pad;
};

+struct drm_syncobj_timeline_wait {
+ __u64 handles;
+ /* wait on specific timeline point for every handles*/
+ __u64 points;
+ /* absolute timeout */
+ __s64 timeout_nsec;
+ __u32 count_handles;
+ __u32 flags;
+ __u32 first_signaled; /* only valid when not waiting all */
+ __u32 pad;
+};
+
+
struct drm_syncobj_array {
__u64 handles;
__u32 count_handles;
@@ -909,6 +923,7 @@ extern "C" {
#define DRM_IOCTL_MODE_GET_LEASE DRM_IOWR(0xC8, struct drm_mode_get_lease)
#define DRM_IOCTL_MODE_REVOKE_LEASE DRM_IOWR(0xC9, struct drm_mode_revoke_lease)

+#define DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT DRM_IOWR(0xCA, struct drm_syncobj_timeline_wait)
/**
* Device specific ioctls should only be in their respective headers
* The device specific ioctl range is from 0x40 to 0x9f.

[Chunming Zhou]

user mode can query timeline payload.
v2: check return value of copy_to_user
v3: handle querying entry by entry
v4: rebase on new chain container, simplify interface

Signed-off-by: Chunming Zhou <***@amd.com>
Cc: Daniel Rakos <***@amd.com>
Cc: Jason Ekstrand <***@jlekstrand.net>
Cc: Bas Nieuwenhuizen <***@basnieuwenhuizen.nl>
Cc: Dave Airlie <***@redhat.com>
Cc: Christian König <***@amd.com>
Cc: Chris Wilson <***@chris-wilson.co.uk>
---
drivers/gpu/drm/drm_internal.h | 2 ++
drivers/gpu/drm/drm_ioctl.c | 2 ++
drivers/gpu/drm/drm_syncobj.c | 43 ++++++++++++++++++++++++++++++++++
include/uapi/drm/drm.h | 10 ++++++++
4 files changed, 57 insertions(+)

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 18b41e10195c..dab4d5936441 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -184,6 +184,8 @@ int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
+int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);

/* drm_framebuffer.c */
void drm_framebuffer_print_info(struct drm_printer *p, unsigned int indent,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index a9a17ed35cc4..7578ef6dc1d1 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -681,6 +681,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_QUERY, drm_syncobj_query_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_CRTC_GET_SEQUENCE, drm_crtc_get_sequence_ioctl, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_CRTC_QUEUE_SEQUENCE, drm_crtc_queue_sequence_ioctl, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_LEASE, drm_mode_create_lease_ioctl, DRM_MASTER|DRM_UNLOCKED),
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 348079bb0965..f97fa00ca1d0 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -1061,3 +1061,46 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,

return ret;
}
+
+int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_timeline_array *args = data;
+ struct drm_syncobj **syncobjs;
+ uint64_t __user *points = u64_to_user_ptr(args->points);
+ uint32_t i;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -ENODEV;
+
+ if (args->pad != 0)
+ return -EINVAL;
+
+ if (args->count_handles == 0)
+ return -EINVAL;
+
+ ret = drm_syncobj_array_find(file_private,
+ u64_to_user_ptr(args->handles),
+ args->count_handles,
+ &syncobjs);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < args->count_handles; i++) {
+ struct dma_fence_chain *chain;
+ struct dma_fence *fence;
+ uint64_t point;
+
+ fence = drm_syncobj_fence_get(syncobjs[i]);
+ chain = to_dma_fence_chain(fence);
+ point = chain ? fence->seqno : 0;
+ ret = copy_to_user(&points[i], &point, sizeof(uint64_t));
+ ret = ret ? -EFAULT : 0;
+ if (ret)
+ break;
+ }
+ drm_syncobj_array_free(syncobjs, args->count_handles);
+
+ return ret;
+}
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 0092111d002c..b2c36f2b2599 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -767,6 +767,14 @@ struct drm_syncobj_array {
__u32 pad;
};

+struct drm_syncobj_timeline_array {
+ __u64 handles;
+ __u64 points;
+ __u32 count_handles;
+ __u32 pad;
+};
+
+
/* Query current scanout sequence number */
struct drm_crtc_get_sequence {
__u32 crtc_id; /* requested crtc_id */
@@ -924,6 +932,8 @@ extern "C" {
#define DRM_IOCTL_MODE_REVOKE_LEASE DRM_IOWR(0xC9, struct drm_mode_revoke_lease)

#define DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT DRM_IOWR(0xCA, struct drm_syncobj_timeline_wait)
+#define DRM_IOCTL_SYNCOBJ_QUERY DRM_IOWR(0xCB, struct drm_syncobj_timeline_array)
+
/**
* Device specific ioctls should only be in their respective headers
* The device specific ioctl range is from 0x40 to 0x9f.

[Chunming Zhou]

From: Christian König <***@gmail.com>

Implement finding the right timeline point in drm_syncobj_find_fence.

v2: return -EINVAL when the point is not submitted yet.
v3: fix reference counting bug, add flags handling as well

Signed-off-by: Christian König <***@amd.com>
---
drivers/gpu/drm/drm_syncobj.c | 43 ++++++++++++++++++++++++++++++++---
1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index f97fa00ca1d0..282982e58dbd 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -231,16 +231,53 @@ int drm_syncobj_find_fence(struct drm_file *file_private,
struct dma_fence **fence)
{
struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle);
- int ret = 0;
+ struct syncobj_wait_entry wait;
+ int ret;

if (!syncobj)
return -ENOENT;

*fence = drm_syncobj_fence_get(syncobj);
- if (!*fence) {
+ drm_syncobj_put(syncobj);
+
+ if (*fence) {
+ ret = dma_fence_chain_find_seqno(fence, point);
+ if (!ret)
+ return 0;
+ dma_fence_put(*fence);
+ } else {
ret = -EINVAL;
}
- drm_syncobj_put(syncobj);
+
+ if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT))
+ return ret;
+
+ memset(&wait, 0, sizeof(wait));
+ wait.task = current;
+ wait.point = point;
+ drm_syncobj_fence_add_wait(syncobj, &wait);
+
+ do {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (wait.fence) {
+ ret = 0;
+ break;
+ }
+
+ if (signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
+ }
+
+ schedule();
+ } while (1);
+
+ __set_current_state(TASK_RUNNING);
+ *fence = wait.fence;
+
+ if (wait.node.next)
+ drm_syncobj_remove_wait(syncobj, &wait);
+
return ret;
}
EXPORT_SYMBOL(drm_syncobj_find_fence);

[Chunming Zhou]

syncobj wait/signal operation is appending in command submission.
v2: separate to two kinds in/out_deps functions

Signed-off-by: Chunming Zhou <***@amd.com>
Cc: Daniel Rakos <***@amd.com>
Cc: Jason Ekstrand <***@jlekstrand.net>
Cc: Bas Nieuwenhuizen <***@basnieuwenhuizen.nl>
Cc: Dave Airlie <***@redhat.com>
Cc: Christian König <***@amd.com>
Cc: Chris Wilson <***@chris-wilson.co.uk>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 10 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 147 +++++++++++++++++++++----
include/uapi/drm/amdgpu_drm.h | 8 ++
3 files changed, 140 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 42f882c633ee..f9160ea1396a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -545,6 +545,12 @@ struct amdgpu_cs_chunk {
void *kdata;
};

+struct amdgpu_cs_post_dep {
+ struct drm_syncobj *syncobj;
+ struct dma_fence_chain *chain;
+ u64 point;
+};
+
struct amdgpu_cs_parser {
struct amdgpu_device *adev;
struct drm_file *filp;
@@ -574,8 +580,8 @@ struct amdgpu_cs_parser {
/* user fence */
struct amdgpu_bo_list_entry uf_entry;

- unsigned num_post_dep_syncobjs;
- struct drm_syncobj **post_dep_syncobjs;
+ unsigned num_post_deps;
+ struct amdgpu_cs_post_dep *post_deps;
};

static inline u32 amdgpu_get_ib_value(struct amdgpu_cs_parser *p,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index dc54e9efd910..580f1ea27157 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -213,6 +213,8 @@ static int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, union drm_amdgpu_cs
case AMDGPU_CHUNK_ID_DEPENDENCIES:
case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
+ case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT:
+ case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL:
break;

default:
@@ -792,9 +794,11 @@ static void amdgpu_cs_parser_fini(struct amdgpu_cs_parser *parser, int error,
ttm_eu_backoff_reservation(&parser->ticket,
&parser->validated);

- for (i = 0; i < parser->num_post_dep_syncobjs; i++)
- drm_syncobj_put(parser->post_dep_syncobjs[i]);
- kfree(parser->post_dep_syncobjs);
+ for (i = 0; i < parser->num_post_deps; i++) {
+ drm_syncobj_put(parser->post_deps[i].syncobj);
+ kfree(parser->post_deps[i].chain);
+ }
+ kfree(parser->post_deps);

dma_fence_put(parser->fence);

@@ -1100,13 +1104,18 @@ static int amdgpu_cs_process_fence_dep(struct amdgpu_cs_parser *p,
}

static int amdgpu_syncobj_lookup_and_add_to_sync(struct amdgpu_cs_parser *p,
- uint32_t handle)
+ uint32_t handle, u64 point,
+ u64 flags)
{
- int r;
struct dma_fence *fence;
- r = drm_syncobj_find_fence(p->filp, handle, 0, 0, &fence);
- if (r)
+ int r;
+
+ r = drm_syncobj_find_fence(p->filp, handle, point, flags, &fence);
+ if (r) {
+ DRM_ERROR("syncobj %u failed to find fence @ %llu (%d)!\n",
+ handle, point, r);
return r;
+ }

r = amdgpu_sync_fence(p->adev, &p->job->sync, fence, true);
dma_fence_put(fence);
@@ -1117,46 +1126,115 @@ static int amdgpu_syncobj_lookup_and_add_to_sync(struct amdgpu_cs_parser *p,
static int amdgpu_cs_process_syncobj_in_dep(struct amdgpu_cs_parser *p,
struct amdgpu_cs_chunk *chunk)
{
+ struct drm_amdgpu_cs_chunk_sem *deps;
unsigned num_deps;
int i, r;
- struct drm_amdgpu_cs_chunk_sem *deps;

deps = (struct drm_amdgpu_cs_chunk_sem *)chunk->kdata;
num_deps = chunk->length_dw * 4 /
sizeof(struct drm_amdgpu_cs_chunk_sem);
+ for (i = 0; i < num_deps; ++i) {
+ r = amdgpu_syncobj_lookup_and_add_to_sync(p, deps[i].handle,
+ 0, 0);
+ if (r)
+ return r;
+ }
+
+ return 0;
+}

+
+static int amdgpu_cs_process_syncobj_timeline_in_dep(struct amdgpu_cs_parser *p,
+ struct amdgpu_cs_chunk *chunk)
+{
+ struct drm_amdgpu_cs_chunk_syncobj *syncobj_deps;
+ unsigned num_deps;
+ int i, r;
+
+ syncobj_deps = (struct drm_amdgpu_cs_chunk_syncobj *)chunk->kdata;
+ num_deps = chunk->length_dw * 4 /
+ sizeof(struct drm_amdgpu_cs_chunk_syncobj);
for (i = 0; i < num_deps; ++i) {
- r = amdgpu_syncobj_lookup_and_add_to_sync(p, deps[i].handle);
+ r = amdgpu_syncobj_lookup_and_add_to_sync(p,
+ syncobj_deps[i].handle,
+ syncobj_deps[i].point,
+ syncobj_deps[i].flags);
if (r)
return r;
}
+
return 0;
}

static int amdgpu_cs_process_syncobj_out_dep(struct amdgpu_cs_parser *p,
struct amdgpu_cs_chunk *chunk)
{
+ struct drm_amdgpu_cs_chunk_sem *deps;
unsigned num_deps;
int i;
- struct drm_amdgpu_cs_chunk_sem *deps;
+
deps = (struct drm_amdgpu_cs_chunk_sem *)chunk->kdata;
num_deps = chunk->length_dw * 4 /
sizeof(struct drm_amdgpu_cs_chunk_sem);

- p->post_dep_syncobjs = kmalloc_array(num_deps,
- sizeof(struct drm_syncobj *),
- GFP_KERNEL);
- p->num_post_dep_syncobjs = 0;
+ p->post_deps = kmalloc_array(num_deps, sizeof(*p->post_deps),
+ GFP_KERNEL);
+ p->num_post_deps = 0;
+
+ if (!p->post_deps)
+ return -ENOMEM;
+
+
+ for (i = 0; i < num_deps; ++i) {
+ p->post_deps[i].syncobj =
+ drm_syncobj_find(p->filp, deps[i].handle);
+ if (!p->post_deps[i].syncobj)
+ return -EINVAL;
+ p->post_deps[i].chain = NULL;
+ p->post_deps[i].point = 0;
+ p->num_post_deps++;
+ }
+
+ return 0;
+}
+
+
+static int amdgpu_cs_process_syncobj_timeline_out_dep(struct amdgpu_cs_parser *p,
+ struct amdgpu_cs_chunk
+ *chunk)
+{
+ struct drm_amdgpu_cs_chunk_syncobj *syncobj_deps;
+ unsigned num_deps;
+ int i;
+
+ syncobj_deps = (struct drm_amdgpu_cs_chunk_syncobj *)chunk->kdata;
+ num_deps = chunk->length_dw * 4 /
+ sizeof(struct drm_amdgpu_cs_chunk_syncobj);
+
+ p->post_deps = kmalloc_array(num_deps, sizeof(*p->post_deps),
+ GFP_KERNEL);
+ p->num_post_deps = 0;

- if (!p->post_dep_syncobjs)
+ if (!p->post_deps)
return -ENOMEM;

for (i = 0; i < num_deps; ++i) {
- p->post_dep_syncobjs[i] = drm_syncobj_find(p->filp, deps[i].handle);
- if (!p->post_dep_syncobjs[i])
+ struct amdgpu_cs_post_dep *dep = &p->post_deps[i];
+
+ dep->chain = kmalloc(sizeof(*dep->chain), GFP_KERNEL);
+ if (!dep->chain)
+ return -ENOMEM;
+
+ dep->syncobj = drm_syncobj_find(p->filp,
+ syncobj_deps[i].handle);
+ if (!dep->syncobj) {
+ kfree(dep->chain);
return -EINVAL;
- p->num_post_dep_syncobjs++;
+ }
+ dep->point = syncobj_deps[i].point;
+ p->num_post_deps++;
}
+
return 0;
}

@@ -1170,18 +1248,32 @@ static int amdgpu_cs_dependencies(struct amdgpu_device *adev,

chunk = &p->chunks[i];

- if (chunk->chunk_id == AMDGPU_CHUNK_ID_DEPENDENCIES) {
+ switch (chunk->chunk_id) {
+ case AMDGPU_CHUNK_ID_DEPENDENCIES:
r = amdgpu_cs_process_fence_dep(p, chunk);
if (r)
return r;
- } else if (chunk->chunk_id == AMDGPU_CHUNK_ID_SYNCOBJ_IN) {
+ break;
+ case AMDGPU_CHUNK_ID_SYNCOBJ_IN:
r = amdgpu_cs_process_syncobj_in_dep(p, chunk);
if (r)
return r;
- } else if (chunk->chunk_id == AMDGPU_CHUNK_ID_SYNCOBJ_OUT) {
+ break;
+ case AMDGPU_CHUNK_ID_SYNCOBJ_OUT:
r = amdgpu_cs_process_syncobj_out_dep(p, chunk);
if (r)
return r;
+ break;
+ case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT:
+ r = amdgpu_cs_process_syncobj_timeline_in_dep(p, chunk);
+ if (r)
+ return r;
+ break;
+ case AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL:
+ r = amdgpu_cs_process_syncobj_timeline_out_dep(p, chunk);
+ if (r)
+ return r;
+ break;
}
}

@@ -1192,8 +1284,17 @@ static void amdgpu_cs_post_dependencies(struct amdgpu_cs_parser *p)
{
int i;

- for (i = 0; i < p->num_post_dep_syncobjs; ++i)
- drm_syncobj_replace_fence(p->post_dep_syncobjs[i], p->fence);
+ for (i = 0; i < p->num_post_deps; ++i) {
+ if (p->post_deps[i].chain) {
+ drm_syncobj_add_point(p->post_deps[i].syncobj,
+ p->post_deps[i].chain,
+ p->fence, p->post_deps[i].point);
+ p->post_deps[i].chain = NULL;
+ } else {
+ drm_syncobj_replace_fence(p->post_deps[i].syncobj,
+ p->fence);
+ }
+ }
}

static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index be84e43c1e19..997222bc1afe 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -523,6 +523,8 @@ struct drm_amdgpu_gem_va {
#define AMDGPU_CHUNK_ID_SYNCOBJ_IN 0x04
#define AMDGPU_CHUNK_ID_SYNCOBJ_OUT 0x05
#define AMDGPU_CHUNK_ID_BO_HANDLES 0x06
+#define AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT 0x07
+#define AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL 0x08

struct drm_amdgpu_cs_chunk {
__u32 chunk_id;
@@ -598,6 +600,12 @@ struct drm_amdgpu_cs_chunk_sem {
__u32 handle;
};

+struct drm_amdgpu_cs_chunk_syncobj {
+ __u32 handle;
+ __u32 flags;
+ __u64 point;
+};
+
#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ 0
#define AMDGPU_FENCE_TO_HANDLE_GET_SYNCOBJ_FD 1
#define AMDGPU_FENCE_TO_HANDLE_GET_SYNC_FILE_FD 2

[Chunming Zhou]

we need to import/export timeline point

Signed-off-by: Chunming Zhou <***@amd.com>
---
drivers/gpu/drm/drm_internal.h | 4 +++
drivers/gpu/drm/drm_ioctl.c | 6 ++++
drivers/gpu/drm/drm_syncobj.c | 66 ++++++++++++++++++++++++++++++++++
include/uapi/drm/drm.h | 10 ++++++
4 files changed, 86 insertions(+)

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index dab4d5936441..ecbe3d51a702 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -176,6 +176,10 @@ int drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
+int drm_syncobj_binary_to_timeline_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
+int drm_syncobj_timeline_to_binary_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
int drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 7578ef6dc1d1..6b417e3c3ea5 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -673,6 +673,12 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, drm_syncobj_fd_to_handle_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE,
+ drm_syncobj_binary_to_timeline_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY,
+ drm_syncobj_timeline_to_binary_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_WAIT, drm_syncobj_wait_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, drm_syncobj_timeline_wait_ioctl,
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 282982e58dbd..cf4daa670252 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -670,6 +670,72 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
&args->handle);
}

+int
+drm_syncobj_binary_to_timeline_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_transfer *args = data;
+ struct drm_syncobj *timeline_syncobj = NULL;
+ struct dma_fence *fence;
+ struct dma_fence_chain *chain;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -ENODEV;
+
+ if (args->pad)
+ return -EINVAL;
+
+ timeline_syncobj = drm_syncobj_find(file_private, args->timeline_handle);
+ if (!timeline_syncobj) {
+ return -ENOENT;
+ }
+ ret = drm_syncobj_find_fence(file_private, args->binary_handle, 0, 0,
+ &fence);
+ if (ret)
+ goto err;
+ chain = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
+ if (!chain)
+ goto err1;
+ drm_syncobj_add_point(timeline_syncobj, chain, fence, args->point);
+err1:
+ dma_fence_put(fence);
+err:
+ drm_syncobj_put(timeline_syncobj);
+
+ return ret;
+}
+
+int
+drm_syncobj_timeline_to_binary_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_transfer *args = data;
+ struct drm_syncobj *binary_syncobj = NULL;
+ struct dma_fence *fence;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -ENODEV;
+
+ if (args->pad)
+ return -EINVAL;
+
+ binary_syncobj = drm_syncobj_find(file_private, args->binary_handle);
+ if (!binary_syncobj)
+ return -ENOENT;
+ ret = drm_syncobj_find_fence(file_private, args->timeline_handle,
+ args->point, args->flags, &fence);
+ if (ret)
+ goto err;
+ drm_syncobj_replace_fence(binary_syncobj, fence);
+ dma_fence_put(fence);
+err:
+ drm_syncobj_put(binary_syncobj);
+
+ return ret;
+}
+
static void syncobj_wait_fence_func(struct dma_fence *fence,
struct dma_fence_cb *cb)
{
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index b2c36f2b2599..88d6129d4a18 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -735,6 +735,14 @@ struct drm_syncobj_handle {
__u32 pad;
};

+struct drm_syncobj_transfer {
+ __u32 binary_handle;
+ __u32 timeline_handle;
+ __u64 point;
+ __u32 flags;
+ __u32 pad;
+};
+
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 << 0)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 << 1)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE (1 << 2)
@@ -933,6 +941,8 @@ extern "C" {

#define DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT DRM_IOWR(0xCA, struct drm_syncobj_timeline_wait)
#define DRM_IOCTL_SYNCOBJ_QUERY DRM_IOWR(0xCB, struct drm_syncobj_timeline_array)
+#define DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE DRM_IOWR(0xCC, struct drm_syncobj_transfer)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY DRM_IOWR(0xCD, struct drm_syncobj_transfer)

/**
* Device specific ioctls should only be in their respective headers

[Koenig, Christian]

I would rather just use a single IOCTL for this and handle point 0 as
distinction if we should add a new point or replace the binary one.

Christian.

Post by Chunming Zhou
we need to import/export timeline point
---
drivers/gpu/drm/drm_internal.h | 4 +++
drivers/gpu/drm/drm_ioctl.c | 6 ++++
drivers/gpu/drm/drm_syncobj.c | 66 ++++++++++++++++++++++++++++++++++
include/uapi/drm/drm.h | 10 ++++++
4 files changed, 86 insertions(+)
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index dab4d5936441..ecbe3d51a702 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -176,6 +176,10 @@ int drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
+int drm_syncobj_binary_to_timeline_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
+int drm_syncobj_timeline_to_binary_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
int drm_syncobj_wait_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 7578ef6dc1d1..6b417e3c3ea5 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -673,6 +673,12 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE, drm_syncobj_fd_to_handle_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE,
+ drm_syncobj_binary_to_timeline_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY,
+ drm_syncobj_timeline_to_binary_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_WAIT, drm_syncobj_wait_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, drm_syncobj_timeline_wait_ioctl,
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index 282982e58dbd..cf4daa670252 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -670,6 +670,72 @@ drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data,
&args->handle);
}
+int
+drm_syncobj_binary_to_timeline_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_transfer *args = data;
+ struct drm_syncobj *timeline_syncobj = NULL;
+ struct dma_fence *fence;
+ struct dma_fence_chain *chain;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -ENODEV;
+
+ if (args->pad)
+ return -EINVAL;
+
+ timeline_syncobj = drm_syncobj_find(file_private, args->timeline_handle);
+ if (!timeline_syncobj) {
+ return -ENOENT;
+ }
+ ret = drm_syncobj_find_fence(file_private, args->binary_handle, 0, 0,
+ &fence);
+ if (ret)
+ goto err;
+ chain = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL);
+ if (!chain)
+ goto err1;
+ drm_syncobj_add_point(timeline_syncobj, chain, fence, args->point);
+ dma_fence_put(fence);
+ drm_syncobj_put(timeline_syncobj);
+
+ return ret;
+}
+
+int
+drm_syncobj_timeline_to_binary_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_transfer *args = data;
+ struct drm_syncobj *binary_syncobj = NULL;
+ struct dma_fence *fence;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -ENODEV;
+
+ if (args->pad)
+ return -EINVAL;
+
+ binary_syncobj = drm_syncobj_find(file_private, args->binary_handle);
+ if (!binary_syncobj)
+ return -ENOENT;
+ ret = drm_syncobj_find_fence(file_private, args->timeline_handle,
+ args->point, args->flags, &fence);
+ if (ret)
+ goto err;
+ drm_syncobj_replace_fence(binary_syncobj, fence);
+ dma_fence_put(fence);
+ drm_syncobj_put(binary_syncobj);
+
+ return ret;
+}
+
static void syncobj_wait_fence_func(struct dma_fence *fence,
struct dma_fence_cb *cb)
{
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index b2c36f2b2599..88d6129d4a18 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -735,6 +735,14 @@ struct drm_syncobj_handle {
__u32 pad;
};
+struct drm_syncobj_transfer {
+ __u32 binary_handle;
+ __u32 timeline_handle;
+ __u64 point;
+ __u32 flags;
+ __u32 pad;
+};
+
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL (1 << 0)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT (1 << 1)
#define DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE (1 << 2)
@@ -933,6 +941,8 @@ extern "C" {
#define DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT DRM_IOWR(0xCA, struct drm_syncobj_timeline_wait)
#define DRM_IOCTL_SYNCOBJ_QUERY DRM_IOWR(0xCB, struct drm_syncobj_timeline_array)
+#define DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE DRM_IOWR(0xCC, struct drm_syncobj_transfer)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY DRM_IOWR(0xCD, struct drm_syncobj_transfer)
/**
* Device specific ioctls should only be in their respective headers

[Chunming Zhou]

Signed-off-by: Chunming Zhou <***@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 8de55f7f1a3a..cafafdb1d03f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -71,9 +71,10 @@
* - 3.25.0 - Add support for sensor query info (stable pstate sclk/mclk).
* - 3.26.0 - GFX9: Process AMDGPU_IB_FLAG_TC_WB_NOT_INVALIDATE.
* - 3.27.0 - Add new chunk to to AMDGPU_CS to enable BO_LIST creation.
+ * - 3.28.0 - Add syncobj timeline support to AMDGPU_CS.
*/
#define KMS_DRIVER_MAJOR 3
-#define KMS_DRIVER_MINOR 27
+#define KMS_DRIVER_MINOR 28
#define KMS_DRIVER_PATCHLEVEL 0

int amdgpu_vram_limit = 0;

[Chunming Zhou]

Signed-off-by: Chunming Zhou <***@amd.com>
---
drivers/gpu/drm/drm_internal.h | 2 +
drivers/gpu/drm/drm_ioctl.c | 2 +
drivers/gpu/drm/drm_syncobj.c | 70 ++++++++++++++++++++++++++++++++++
include/uapi/drm/drm.h | 1 +
4 files changed, 75 insertions(+)

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index ecbe3d51a702..149c2f589ec9 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -188,6 +188,8 @@ int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
+int drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);

diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 6b417e3c3ea5..d05586601eb5 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -687,6 +687,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL, drm_syncobj_timeline_signal_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_QUERY, drm_syncobj_query_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_CRTC_GET_SEQUENCE, drm_crtc_get_sequence_ioctl, DRM_UNLOCKED),
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index cf4daa670252..238ed89593a7 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -1165,6 +1165,76 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
return ret;
}

+int
+drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_timeline_array *args = data;
+ struct drm_syncobj **syncobjs;
+ struct dma_fence_chain *chains;
+ uint64_t *points;
+ uint32_t i, j, timeline_count = 0;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -EOPNOTSUPP;
+
+ if (args->pad != 0)
+ return -EINVAL;
+
+ if (args->count_handles == 0)
+ return -EINVAL;
+
+ ret = drm_syncobj_array_find(file_private,
+ u64_to_user_ptr(args->handles),
+ args->count_handles,
+ &syncobjs);
+ if (ret < 0)
+ return ret;
+
+ points = kmalloc_array(args->count_handles, sizeof(*points),
+ GFP_KERNEL);
+ if (!points) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (!u64_to_user_ptr(args->points)) {
+ memset(points, 0, args->count_handles * sizeof(uint64_t));
+ } else if (copy_from_user(points, u64_to_user_ptr(args->points),
+ sizeof(uint64_t) * args->count_handles)) {
+ ret = -EFAULT;
+ goto err_points;
+ }
+
+
+ for (i = 0; i < args->count_handles; i++) {
+ if (points[i])
+ timeline_count++;
+ }
+ chains = kmalloc_array(timeline_count, sizeof(*chains), GFP_KERNEL);
+ if (!chains) {
+ ret = -ENOMEM;
+ goto err_points;
+ }
+
+ for (i = 0, j = 0; i < args->count_handles; i++) {
+ if (points[i]) {
+ struct dma_fence *fence = dma_fence_get_stub();
+
+ drm_syncobj_add_point(syncobjs[i], &chains[j++],
+ fence, points[i]);
+ dma_fence_put(fence);
+ } else
+ drm_syncobj_assign_null_handle(syncobjs[i]);
+ }
+err_points:
+ kfree(points);
+out:
+ drm_syncobj_array_free(syncobjs, args->count_handles);
+
+ return ret;
+}
+
int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private)
{
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 88d6129d4a18..9a5fa3c26f22 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -943,6 +943,7 @@ extern "C" {
#define DRM_IOCTL_SYNCOBJ_QUERY DRM_IOWR(0xCB, struct drm_syncobj_timeline_array)
#define DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE DRM_IOWR(0xCC, struct drm_syncobj_transfer)
#define DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY DRM_IOWR(0xCD, struct drm_syncobj_transfer)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL DRM_IOWR(0xCE, struct drm_syncobj_timeline_array)

/**
* Device specific ioctls should only be in their respective headers

[Christian König]

Post by Chunming Zhou
---
drivers/gpu/drm/drm_internal.h | 2 +
drivers/gpu/drm/drm_ioctl.c | 2 +
drivers/gpu/drm/drm_syncobj.c | 70 ++++++++++++++++++++++++++++++++++
include/uapi/drm/drm.h | 1 +
4 files changed, 75 insertions(+)
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index ecbe3d51a702..149c2f589ec9 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -188,6 +188,8 @@ int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
+int drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private);
int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private);
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 6b417e3c3ea5..d05586601eb5 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -687,6 +687,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
+ DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL, drm_syncobj_timeline_signal_ioctl,
+ DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_QUERY, drm_syncobj_query_ioctl,
DRM_UNLOCKED|DRM_RENDER_ALLOW),
DRM_IOCTL_DEF(DRM_IOCTL_CRTC_GET_SEQUENCE, drm_crtc_get_sequence_ioctl, DRM_UNLOCKED),
diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
index cf4daa670252..238ed89593a7 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -1165,6 +1165,76 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
return ret;
}
+int
+drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+ struct drm_file *file_private)
+{
+ struct drm_syncobj_timeline_array *args = data;
+ struct drm_syncobj **syncobjs;
+ struct dma_fence_chain *chains;
+ uint64_t *points;
+ uint32_t i, j, timeline_count = 0;
+ int ret;
+
+ if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+ return -EOPNOTSUPP;
+
+ if (args->pad != 0)
+ return -EINVAL;
+
+ if (args->count_handles == 0)
+ return -EINVAL;
+
+ ret = drm_syncobj_array_find(file_private,
+ u64_to_user_ptr(args->handles),
+ args->count_handles,
+ &syncobjs);
+ if (ret < 0)
+ return ret;
+
+ points = kmalloc_array(args->count_handles, sizeof(*points),
+ GFP_KERNEL);
+ if (!points) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (!u64_to_user_ptr(args->points)) {
+ memset(points, 0, args->count_handles * sizeof(uint64_t));
+ } else if (copy_from_user(points, u64_to_user_ptr(args->points),
+ sizeof(uint64_t) * args->count_handles)) {
+ ret = -EFAULT;
+ goto err_points;
+ }
+
+
+ for (i = 0; i < args->count_handles; i++) {
+ if (points[i])
+ timeline_count++;
+ }
+ chains = kmalloc_array(timeline_count, sizeof(*chains), GFP_KERNEL);

I don't think that this will work. We need individually allocated chain
objects.

Apart from that this looks good to me,
Christian.

Post by Chunming Zhou
+ if (!chains) {
+ ret = -ENOMEM;
+ goto err_points;
+ }
+
+ for (i = 0, j = 0; i < args->count_handles; i++) {
+ if (points[i]) {
+ struct dma_fence *fence = dma_fence_get_stub();
+
+ drm_syncobj_add_point(syncobjs[i], &chains[j++],
+ fence, points[i]);
+ dma_fence_put(fence);
+ } else
+ drm_syncobj_assign_null_handle(syncobjs[i]);
+ }
+ kfree(points);
+ drm_syncobj_array_free(syncobjs, args->count_handles);
+
+ return ret;
+}
+
int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_private)
{
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 88d6129d4a18..9a5fa3c26f22 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -943,6 +943,7 @@ extern "C" {
#define DRM_IOCTL_SYNCOBJ_QUERY DRM_IOWR(0xCB, struct drm_syncobj_timeline_array)
#define DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE DRM_IOWR(0xCC, struct drm_syncobj_transfer)
#define DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY DRM_IOWR(0xCD, struct drm_syncobj_transfer)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL DRM_IOWR(0xCE, struct drm_syncobj_timeline_array)
/**
* Device specific ioctls should only be in their respective headers

[Chunming Zhou]

Post by Christian König

---
  drivers/gpu/drm/drm_internal.h |  2 +
  drivers/gpu/drm/drm_ioctl.c    |  2 +
  drivers/gpu/drm/drm_syncobj.c  | 70 ++++++++++++++++++++++++++++++++++
  include/uapi/drm/drm.h         |  1 +
  4 files changed, 75 insertions(+)
diff --git a/drivers/gpu/drm/drm_internal.h
b/drivers/gpu/drm/drm_internal.h
index ecbe3d51a702..149c2f589ec9 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -188,6 +188,8 @@ int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
                  struct drm_file *file_private);
  int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
                   struct drm_file *file_private);
+int drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+                      struct drm_file *file_private);
  int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
                  struct drm_file *file_private);
  diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 6b417e3c3ea5..d05586601eb5 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -687,6 +687,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
                DRM_UNLOCKED|DRM_RENDER_ALLOW),
      DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
                DRM_UNLOCKED|DRM_RENDER_ALLOW),
+    DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL,
drm_syncobj_timeline_signal_ioctl,
+              DRM_UNLOCKED|DRM_RENDER_ALLOW),
      DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_QUERY, drm_syncobj_query_ioctl,
                DRM_UNLOCKED|DRM_RENDER_ALLOW),
      DRM_IOCTL_DEF(DRM_IOCTL_CRTC_GET_SEQUENCE,
drm_crtc_get_sequence_ioctl, DRM_UNLOCKED),
diff --git a/drivers/gpu/drm/drm_syncobj.c
b/drivers/gpu/drm/drm_syncobj.c
index cf4daa670252..238ed89593a7 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -1165,6 +1165,76 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
      return ret;
  }
  +int
+drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+                  struct drm_file *file_private)
+{
+    struct drm_syncobj_timeline_array *args = data;
+    struct drm_syncobj **syncobjs;
+    struct dma_fence_chain *chains;
+    uint64_t *points;
+    uint32_t i, j, timeline_count = 0;
+    int ret;
+
+    if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+        return -EOPNOTSUPP;
+
+    if (args->pad != 0)
+        return -EINVAL;
+
+    if (args->count_handles == 0)
+        return -EINVAL;
+
+    ret = drm_syncobj_array_find(file_private,
+                     u64_to_user_ptr(args->handles),
+                     args->count_handles,
+                     &syncobjs);
+    if (ret < 0)
+        return ret;
+
+    points = kmalloc_array(args->count_handles, sizeof(*points),
+                   GFP_KERNEL);
+    if (!points) {
+        ret = -ENOMEM;
+        goto out;
+    }
+    if (!u64_to_user_ptr(args->points)) {
+        memset(points, 0, args->count_handles * sizeof(uint64_t));
+    } else if (copy_from_user(points, u64_to_user_ptr(args->points),
+                  sizeof(uint64_t) * args->count_handles)) {
+        ret = -EFAULT;
+        goto err_points;
+    }
+
+
+    for (i = 0; i < args->count_handles; i++) {
+        if (points[i])
+            timeline_count++;
+    }
+    chains = kmalloc_array(timeline_count, sizeof(*chains),
GFP_KERNEL);

I don't think that this will work. We need individually allocated
chain objects.

Yeah, I shouldn't use &chains[i] to get address, how about using cast
like "(struct dma_fence_chain *)chains[i]".

btw, I will add a test case for signal array in igt.


-David

Post by Christian König
Apart from that this looks good to me,
Christian.

+    if (!chains) {
+        ret = -ENOMEM;
+        goto err_points;
+    }
+
+    for (i = 0, j = 0; i < args->count_handles; i++) {
+        if (points[i]) {
+            struct dma_fence *fence = dma_fence_get_stub();
+
+            drm_syncobj_add_point(syncobjs[i], &chains[j++],
+                          fence, points[i]);
+            dma_fence_put(fence);
+        } else
+            drm_syncobj_assign_null_handle(syncobjs[i]);
+    }
+    kfree(points);
+    drm_syncobj_array_free(syncobjs, args->count_handles);
+
+    return ret;
+}
+
  int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
                  struct drm_file *file_private)
  {
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 88d6129d4a18..9a5fa3c26f22 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -943,6 +943,7 @@ extern "C" {
  #define DRM_IOCTL_SYNCOBJ_QUERY        DRM_IOWR(0xCB, struct
drm_syncobj_timeline_array)
  #define DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE    DRM_IOWR(0xCC,
struct drm_syncobj_transfer)
  #define DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY    DRM_IOWR(0xCD,
struct drm_syncobj_transfer)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL    DRM_IOWR(0xCE, struct
drm_syncobj_timeline_array)
    /**
   * Device specific ioctls should only be in their respective headers

[Koenig, Christian]

Post by Chunming Zhou

Post by Christian König

---
  drivers/gpu/drm/drm_internal.h |  2 +
  drivers/gpu/drm/drm_ioctl.c    |  2 +
  drivers/gpu/drm/drm_syncobj.c  | 70 ++++++++++++++++++++++++++++++++++
  include/uapi/drm/drm.h         |  1 +
  4 files changed, 75 insertions(+)
diff --git a/drivers/gpu/drm/drm_internal.h
b/drivers/gpu/drm/drm_internal.h
index ecbe3d51a702..149c2f589ec9 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -188,6 +188,8 @@ int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
                  struct drm_file *file_private);
  int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
                   struct drm_file *file_private);
+int drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+                      struct drm_file *file_private);
  int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
                  struct drm_file *file_private);
  diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index 6b417e3c3ea5..d05586601eb5 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -687,6 +687,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
                DRM_UNLOCKED|DRM_RENDER_ALLOW),
      DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,
                DRM_UNLOCKED|DRM_RENDER_ALLOW),
+    DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL,
drm_syncobj_timeline_signal_ioctl,
+              DRM_UNLOCKED|DRM_RENDER_ALLOW),
      DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_QUERY, drm_syncobj_query_ioctl,
                DRM_UNLOCKED|DRM_RENDER_ALLOW),
      DRM_IOCTL_DEF(DRM_IOCTL_CRTC_GET_SEQUENCE,
drm_crtc_get_sequence_ioctl, DRM_UNLOCKED),
diff --git a/drivers/gpu/drm/drm_syncobj.c
b/drivers/gpu/drm/drm_syncobj.c
index cf4daa670252..238ed89593a7 100644
--- a/drivers/gpu/drm/drm_syncobj.c
+++ b/drivers/gpu/drm/drm_syncobj.c
@@ -1165,6 +1165,76 @@ drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,
      return ret;
  }
  +int
+drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data,
+                  struct drm_file *file_private)
+{
+    struct drm_syncobj_timeline_array *args = data;
+    struct drm_syncobj **syncobjs;
+    struct dma_fence_chain *chains;
+    uint64_t *points;
+    uint32_t i, j, timeline_count = 0;
+    int ret;
+
+    if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ))
+        return -EOPNOTSUPP;
+
+    if (args->pad != 0)
+        return -EINVAL;
+
+    if (args->count_handles == 0)
+        return -EINVAL;
+
+    ret = drm_syncobj_array_find(file_private,
+                     u64_to_user_ptr(args->handles),
+                     args->count_handles,
+                     &syncobjs);
+    if (ret < 0)
+        return ret;
+
+    points = kmalloc_array(args->count_handles, sizeof(*points),
+                   GFP_KERNEL);
+    if (!points) {
+        ret = -ENOMEM;
+        goto out;
+    }
+    if (!u64_to_user_ptr(args->points)) {
+        memset(points, 0, args->count_handles * sizeof(uint64_t));
+    } else if (copy_from_user(points, u64_to_user_ptr(args->points),
+                  sizeof(uint64_t) * args->count_handles)) {
+        ret = -EFAULT;
+        goto err_points;
+    }
+
+
+    for (i = 0; i < args->count_handles; i++) {
+        if (points[i])
+            timeline_count++;
+    }
+    chains = kmalloc_array(timeline_count, sizeof(*chains),
GFP_KERNEL);

I don't think that this will work. We need individually allocated
chain objects.

Yeah, I shouldn't use &chains[i] to get address, how about using cast
like "(struct dma_fence_chain *)chains[i]".

No, that still won't work. You need an array of individual objects here,
not a single array with many entries.

E.g. something like this:

struct dma_fence_chain **chains = kmalloc_array(count, sizeof(void*));

for (i = 0; i < count; ++i)
    chains[i] = kmalloc(....);

Christian.

Post by Chunming Zhou
btw, I will add a test case for signal array in igt.
-David

Post by Christian König
Apart from that this looks good to me,
Christian.

+    if (!chains) {
+        ret = -ENOMEM;
+        goto err_points;
+    }
+
+    for (i = 0, j = 0; i < args->count_handles; i++) {
+        if (points[i]) {
+            struct dma_fence *fence = dma_fence_get_stub();
+
+            drm_syncobj_add_point(syncobjs[i], &chains[j++],
+                          fence, points[i]);
+            dma_fence_put(fence);
+        } else
+            drm_syncobj_assign_null_handle(syncobjs[i]);
+    }
+    kfree(points);
+    drm_syncobj_array_free(syncobjs, args->count_handles);
+
+    return ret;
+}
+
  int drm_syncobj_query_ioctl(struct drm_device *dev, void *data,
                  struct drm_file *file_private)
  {
diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h
index 88d6129d4a18..9a5fa3c26f22 100644
--- a/include/uapi/drm/drm.h
+++ b/include/uapi/drm/drm.h
@@ -943,6 +943,7 @@ extern "C" {
  #define DRM_IOCTL_SYNCOBJ_QUERY        DRM_IOWR(0xCB, struct
drm_syncobj_timeline_array)
  #define DRM_IOCTL_SYNCOBJ_BINARY_TO_TIMELINE    DRM_IOWR(0xCC,
struct drm_syncobj_transfer)
  #define DRM_IOCTL_SYNCOBJ_TIMELINE_TO_BINARY    DRM_IOWR(0xCD,
struct drm_syncobj_transfer)
+#define DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL    DRM_IOWR(0xCE, struct
drm_syncobj_timeline_array)
    /**
   * Device specific ioctls should only be in their respective headers