From b888751a02e7b2bfa4c9660bd8c5af0ef886aeef Mon Sep 17 00:00:00 2001 From: Oded Gabbay Date: Mon, 15 Jul 2019 21:55:57 +0300 Subject: [PATCH] habanalabs: add handle field to context structure This patch adds a field to the context's structure that will hold a unique handle for the context. This will be needed when the user will create the context. Signed-off-by: Oded Gabbay Reviewed-by: Greg Kroah-Hartman --- drivers/misc/habanalabs/context.c | 27 ++++++++++++++++----------- drivers/misc/habanalabs/habanalabs.h | 2 ++ 2 files changed, 18 insertions(+), 11 deletions(-) diff --git a/drivers/misc/habanalabs/context.c b/drivers/misc/habanalabs/context.c index 8682590e3f6e..1d8390418234 100644 --- a/drivers/misc/habanalabs/context.c +++ b/drivers/misc/habanalabs/context.c @@ -67,9 +67,20 @@ int hl_ctx_create(struct hl_device *hdev, struct hl_fpriv *hpriv) goto out_err; } + mutex_lock(&mgr->ctx_lock); + rc = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL); + mutex_unlock(&mgr->ctx_lock); + + if (rc < 0) { + dev_err(hdev->dev, "Failed to allocate IDR for a new CTX\n"); + goto free_ctx; + } + + ctx->handle = rc; + rc = hl_ctx_init(hdev, ctx, false); if (rc) - goto free_ctx; + goto remove_from_idr; hl_hpriv_get(hpriv); ctx->hpriv = hpriv; @@ -78,18 +89,12 @@ int hl_ctx_create(struct hl_device *hdev, struct hl_fpriv *hpriv) hpriv->ctx = ctx; hdev->user_ctx = ctx; - mutex_lock(&mgr->ctx_lock); - rc = idr_alloc(&mgr->ctx_handles, ctx, 1, 0, GFP_KERNEL); - mutex_unlock(&mgr->ctx_lock); - - if (rc < 0) { - dev_err(hdev->dev, "Failed to allocate IDR for a new CTX\n"); - hl_ctx_free(hdev, ctx); - goto out_err; - } - return 0; +remove_from_idr: + mutex_lock(&mgr->ctx_lock); + idr_remove(&mgr->ctx_handles, ctx->handle); + mutex_unlock(&mgr->ctx_lock); free_ctx: kfree(ctx); out_err: diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h index e041afe895cf..16f16f7c1e3a 100644 --- a/drivers/misc/habanalabs/habanalabs.h +++ b/drivers/misc/habanalabs/habanalabs.h @@ -636,6 +636,7 @@ struct hl_va_range { * execution phase before the context switch phase * has finished. * @asid: context's unique address space ID in the device's MMU. + * @handle: context's opaque handle for user */ struct hl_ctx { DECLARE_HASHTABLE(mem_hash, MEM_HASH_TABLE_BITS); @@ -657,6 +658,7 @@ struct hl_ctx { atomic_t thread_ctx_switch_token; u32 thread_ctx_switch_wait_token; u32 asid; + u32 handle; }; /**