From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 10 Oct 2025 19:54:49 +0000 (-0400)
Subject: drm/amdgpu/sdma: add query for CSA size and alignment
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c28a1142766f9d80880c556fde4b94c3ad00ac96;p=thirdparty%2Fkernel%2Flinux.git

drm/amdgpu/sdma: add query for CSA size and alignment

Needed to query the CSA size and alignment for SDMA
user queues.

Reviewed-by: Prike Liang <Prike.Liang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
index cb0f8e8a00007..2bf365609775a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.h
@@ -50,6 +50,11 @@ enum amdgpu_sdma_irq {
 
 #define NUM_SDMA(x) hweight32(x)
 
+struct amdgpu_sdma_csa_info {
+	u32 size;
+	u32 alignment;
+};
+
 struct amdgpu_sdma_funcs {
 	int (*stop_kernel_queue)(struct amdgpu_ring *ring);
 	int (*start_kernel_queue)(struct amdgpu_ring *ring);
@@ -139,6 +144,8 @@ struct amdgpu_sdma {
 	struct list_head	reset_callback_list;
 	bool			no_user_submission;
 	bool			disable_uq;
+	void (*get_csa_info)(struct amdgpu_device *adev,
+			     struct amdgpu_sdma_csa_info *csa_info);
 };
 
 /*
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
index 4996d60751ef7..f38c2bdd01e3c 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
@@ -1268,6 +1268,17 @@ static void sdma_v6_0_set_ras_funcs(struct amdgpu_device *adev)
 	}
 }
 
+/* all sizes are in bytes */
+#define SDMA6_CSA_SIZE       32
+#define SDMA6_CSA_ALIGNMENT  4
+
+static void sdma_v6_0_get_csa_info(struct amdgpu_device *adev,
+				   struct amdgpu_sdma_csa_info *csa_info)
+{
+	csa_info->size = SDMA6_CSA_SIZE;
+	csa_info->alignment = SDMA6_CSA_ALIGNMENT;
+}
+
 static int sdma_v6_0_early_init(struct amdgpu_ip_block *ip_block)
 {
 	struct amdgpu_device *adev = ip_block->adev;
@@ -1300,6 +1311,7 @@ static int sdma_v6_0_early_init(struct amdgpu_ip_block *ip_block)
 	sdma_v6_0_set_irq_funcs(adev);
 	sdma_v6_0_set_mqd_funcs(adev);
 	sdma_v6_0_set_ras_funcs(adev);
+	adev->sdma.get_csa_info = &sdma_v6_0_get_csa_info;
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
index 7fee98d377205..d2a09e7a1bc27 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v7_0.c
@@ -1253,6 +1253,17 @@ static void sdma_v7_0_ring_emit_reg_write_reg_wait(struct amdgpu_ring *ring,
 	amdgpu_ring_emit_reg_wait(ring, reg1, mask, mask);
 }
 
+/* all sizes are in bytes */
+#define SDMA7_CSA_SIZE       32
+#define SDMA7_CSA_ALIGNMENT  4
+
+static void sdma_v7_0_get_csa_info(struct amdgpu_device *adev,
+				   struct amdgpu_sdma_csa_info *csa_info)
+{
+	csa_info->size = SDMA7_CSA_SIZE;
+	csa_info->alignment = SDMA7_CSA_ALIGNMENT;
+}
+
 static int sdma_v7_0_early_init(struct amdgpu_ip_block *ip_block)
 {
 	struct amdgpu_device *adev = ip_block->adev;
@@ -1286,6 +1297,7 @@ static int sdma_v7_0_early_init(struct amdgpu_ip_block *ip_block)
 	sdma_v7_0_set_vm_pte_funcs(adev);
 	sdma_v7_0_set_irq_funcs(adev);
 	sdma_v7_0_set_mqd_funcs(adev);
+	adev->sdma.get_csa_info = &sdma_v7_0_get_csa_info;
 
 	return 0;
 }