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Subject[PATCH 3/4] habanalabs: sync stream refactor functions
Date
From: Ofir Bitton <obitton@habana.ai>

Refactor sync stream implementation by reducing function length
for better readability.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
.../habanalabs/common/command_submission.c | 210 ++++++++++--------
1 file changed, 119 insertions(+), 91 deletions(-)

diff --git a/drivers/misc/habanalabs/common/command_submission.c b/drivers/misc/habanalabs/common/command_submission.c
index 0d82c7dd93d0..b0f33579ca7f 100644
--- a/drivers/misc/habanalabs/common/command_submission.c
+++ b/drivers/misc/habanalabs/common/command_submission.c
@@ -792,22 +792,121 @@ static int cs_ioctl_default(struct hl_fpriv *hpriv, void __user *chunks,
return rc;
}

+static int cs_ioctl_extract_signal_seq(struct hl_device *hdev,
+ struct hl_cs_chunk *chunk, u64 *signal_seq)
+{
+ u64 *signal_seq_arr = NULL;
+ u32 size_to_copy, signal_seq_arr_len;
+ int rc = 0;
+
+ signal_seq_arr_len = chunk->num_signal_seq_arr;
+
+ /* currently only one signal seq is supported */
+ if (signal_seq_arr_len != 1) {
+ dev_err(hdev->dev,
+ "Wait for signal CS supports only one signal CS seq\n");
+ return -EINVAL;
+ }
+
+ signal_seq_arr = kmalloc_array(signal_seq_arr_len,
+ sizeof(*signal_seq_arr),
+ GFP_ATOMIC);
+ if (!signal_seq_arr)
+ return -ENOMEM;
+
+ size_to_copy = chunk->num_signal_seq_arr * sizeof(*signal_seq_arr);
+ if (copy_from_user(signal_seq_arr,
+ u64_to_user_ptr(chunk->signal_seq_arr),
+ size_to_copy)) {
+ dev_err(hdev->dev,
+ "Failed to copy signal seq array from user\n");
+ rc = -EFAULT;
+ goto out;
+ }
+
+ /* currently it is guaranteed to have only one signal seq */
+ *signal_seq = signal_seq_arr[0];
+
+out:
+ kfree(signal_seq_arr);
+
+ return rc;
+}
+
+static int cs_ioctl_signal_wait_create_jobs(struct hl_device *hdev,
+ struct hl_ctx *ctx, struct hl_cs *cs, enum hl_queue_type q_type,
+ u32 q_idx)
+{
+ struct hl_cs_counters_atomic *cntr;
+ struct hl_cs_job *job;
+ struct hl_cb *cb;
+ u32 cb_size;
+
+ cntr = &hdev->aggregated_cs_counters;
+
+ job = hl_cs_allocate_job(hdev, q_type, true);
+ if (!job) {
+ ctx->cs_counters.out_of_mem_drop_cnt++;
+ atomic64_inc(&cntr->out_of_mem_drop_cnt);
+ dev_err(hdev->dev, "Failed to allocate a new job\n");
+ return -ENOMEM;
+ }
+
+ if (cs->type == CS_TYPE_WAIT)
+ cb_size = hdev->asic_funcs->get_wait_cb_size(hdev);
+ else
+ cb_size = hdev->asic_funcs->get_signal_cb_size(hdev);
+
+ cb = hl_cb_kernel_create(hdev, cb_size,
+ q_type == QUEUE_TYPE_HW && hdev->mmu_enable);
+ if (!cb) {
+ ctx->cs_counters.out_of_mem_drop_cnt++;
+ atomic64_inc(&cntr->out_of_mem_drop_cnt);
+ kfree(job);
+ return -EFAULT;
+ }
+
+ job->id = 0;
+ job->cs = cs;
+ job->user_cb = cb;
+ job->user_cb->cs_cnt++;
+ job->user_cb_size = cb_size;
+ job->hw_queue_id = q_idx;
+
+ /*
+ * No need in parsing, user CB is the patched CB.
+ * We call hl_cb_destroy() out of two reasons - we don't need the CB in
+ * the CB idr anymore and to decrement its refcount as it was
+ * incremented inside hl_cb_kernel_create().
+ */
+ job->patched_cb = job->user_cb;
+ job->job_cb_size = job->user_cb_size;
+ hl_cb_destroy(hdev, &hdev->kernel_cb_mgr, cb->id << PAGE_SHIFT);
+
+ cs->jobs_in_queue_cnt[job->hw_queue_id]++;
+
+ list_add_tail(&job->cs_node, &cs->job_list);
+
+ hl_debugfs_add_job(hdev, job);
+
+ return 0;
+}
+
static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
void __user *chunks, u32 num_chunks,
u64 *cs_seq)
{
- u32 size_to_copy, q_idx, signal_seq_arr_len, cb_size;
+ struct hl_device *hdev = hpriv->hdev;
+ struct hl_ctx *ctx = hpriv->ctx;
struct hl_cs_chunk *cs_chunk_array, *chunk;
struct hw_queue_properties *hw_queue_prop;
- u64 *signal_seq_arr = NULL, signal_seq;
- struct hl_device *hdev = hpriv->hdev;
- struct hl_cs_counters_atomic *cntr;
struct hl_fence *sig_fence = NULL;
- struct hl_ctx *ctx = hpriv->ctx;
- enum hl_queue_type q_type;
- struct hl_cs_job *job;
+ struct hl_cs_counters_atomic *cntr;
+ struct hl_cs_compl *sig_waitcs_cmpl;
struct hl_cs *cs;
- struct hl_cb *cb;
+ enum hl_queue_type q_type;
+ u32 size_to_copy, q_idx;
+ u64 signal_seq;
int rc;

*cs_seq = ULLONG_MAX;
@@ -857,52 +956,23 @@ static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
}

if (cs_type == CS_TYPE_WAIT) {
- struct hl_cs_compl *sig_waitcs_cmpl;
-
- signal_seq_arr_len = chunk->num_signal_seq_arr;
-
- /* currently only one signal seq is supported */
- if (signal_seq_arr_len != 1) {
- dev_err(hdev->dev,
- "Wait for signal CS supports only one signal CS seq\n");
- rc = -EINVAL;
+ rc = cs_ioctl_extract_signal_seq(hdev, chunk, &signal_seq);
+ if (rc)
goto free_cs_chunk_array;
- }

- signal_seq_arr = kmalloc_array(signal_seq_arr_len,
- sizeof(*signal_seq_arr),
- GFP_ATOMIC);
- if (!signal_seq_arr) {
- rc = -ENOMEM;
- goto free_cs_chunk_array;
- }
-
- size_to_copy = chunk->num_signal_seq_arr *
- sizeof(*signal_seq_arr);
- if (copy_from_user(signal_seq_arr,
- u64_to_user_ptr(chunk->signal_seq_arr),
- size_to_copy)) {
- dev_err(hdev->dev,
- "Failed to copy signal seq array from user\n");
- rc = -EFAULT;
- goto free_signal_seq_array;
- }
-
- /* currently it is guaranteed to have only one signal seq */
- signal_seq = signal_seq_arr[0];
sig_fence = hl_ctx_get_fence(ctx, signal_seq);
if (IS_ERR(sig_fence)) {
dev_err(hdev->dev,
"Failed to get signal CS with seq 0x%llx\n",
signal_seq);
rc = PTR_ERR(sig_fence);
- goto free_signal_seq_array;
+ goto free_cs_chunk_array;
}

if (!sig_fence) {
/* signal CS already finished */
rc = 0;
- goto free_signal_seq_array;
+ goto free_cs_chunk_array;
}

sig_waitcs_cmpl =
@@ -914,14 +984,14 @@ static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
signal_seq);
hl_fence_put(sig_fence);
rc = -EINVAL;
- goto free_signal_seq_array;
+ goto free_cs_chunk_array;
}

if (completion_done(&sig_fence->completion)) {
/* signal CS already finished */
hl_fence_put(sig_fence);
rc = 0;
- goto free_signal_seq_array;
+ goto free_cs_chunk_array;
}
}

@@ -933,70 +1003,31 @@ static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
if (cs_type == CS_TYPE_WAIT)
hl_fence_put(sig_fence);
hl_ctx_put(ctx);
- goto free_signal_seq_array;
+ goto free_cs_chunk_array;
}

/*
* Save the signal CS fence for later initialization right before
* hanging the wait CS on the queue.
*/
- if (cs->type == CS_TYPE_WAIT)
+ if (cs_type == CS_TYPE_WAIT)
cs->signal_fence = sig_fence;

hl_debugfs_add_cs(cs);

*cs_seq = cs->sequence;

- job = hl_cs_allocate_job(hdev, q_type, true);
- if (!job) {
- ctx->cs_counters.out_of_mem_drop_cnt++;
- atomic64_inc(&cntr->out_of_mem_drop_cnt);
- dev_err(hdev->dev, "Failed to allocate a new job\n");
- rc = -ENOMEM;
- goto put_cs;
- }
-
- if (cs->type == CS_TYPE_WAIT)
- cb_size = hdev->asic_funcs->get_wait_cb_size(hdev);
- else
- cb_size = hdev->asic_funcs->get_signal_cb_size(hdev);
+ if (cs_type == CS_TYPE_WAIT || cs_type == CS_TYPE_SIGNAL)
+ rc = cs_ioctl_signal_wait_create_jobs(hdev, ctx, cs, q_type,
+ q_idx);

- cb = hl_cb_kernel_create(hdev, cb_size,
- q_type == QUEUE_TYPE_HW && hdev->mmu_enable);
- if (!cb) {
- ctx->cs_counters.out_of_mem_drop_cnt++;
- atomic64_inc(&cntr->out_of_mem_drop_cnt);
- kfree(job);
- rc = -EFAULT;
+ if (rc)
goto put_cs;
- }

- job->id = 0;
- job->cs = cs;
- job->user_cb = cb;
- job->user_cb->cs_cnt++;
- job->user_cb_size = cb_size;
- job->hw_queue_id = q_idx;
-
- /*
- * No need in parsing, user CB is the patched CB.
- * We call hl_cb_destroy() out of two reasons - we don't need the CB in
- * the CB idr anymore and to decrement its refcount as it was
- * incremented inside hl_cb_kernel_create().
- */
- job->patched_cb = job->user_cb;
- job->job_cb_size = job->user_cb_size;
- hl_cb_destroy(hdev, &hdev->kernel_cb_mgr, cb->id << PAGE_SHIFT);
-
- cs->jobs_in_queue_cnt[job->hw_queue_id]++;
-
- list_add_tail(&job->cs_node, &cs->job_list);

/* increment refcount as for external queues we get completion */
cs_get(cs);

- hl_debugfs_add_job(hdev, job);
-
rc = hl_hw_queue_schedule_cs(cs);
if (rc) {
if (rc != -EAGAIN)
@@ -1016,9 +1047,6 @@ static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
put_cs:
/* We finished with the CS in this function, so put the ref */
cs_put(cs);
-free_signal_seq_array:
- if (cs_type == CS_TYPE_WAIT)
- kfree(signal_seq_arr);
free_cs_chunk_array:
kfree(cs_chunk_array);
out:
--
2.17.1
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