From bff00202c46ef180123315e9004b71a092fa614c Mon Sep 17 00:00:00 2001
From: Jack Xiao <Jack.Xiao@amd.com>
Date: Fri, 20 Mar 2020 14:53:07 +0800
Subject: drm/amdgpu: use the whole doorbell space for mes
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Git-commit: de33a32968e8e2a22b0d6ae621a4505fccce8234
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

Use the whole doorbell space for mes. Each queue in one process occupies
one doorbell slot to ring the queue submitting.

Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 32 +++++++++++++---------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 53d938d5a00a..9b5d1979ac0e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1044,19 +1044,25 @@ static int amdgpu_device_doorbell_init(struct amdgpu_device *adev)
 	adev->doorbell.base = pci_resource_start(adev->pdev, 2);
 	adev->doorbell.size = pci_resource_len(adev->pdev, 2);
 
-	adev->doorbell.num_doorbells = min_t(u32, adev->doorbell.size / sizeof(u32),
-					     adev->doorbell_index.max_assignment+1);
-	if (adev->doorbell.num_doorbells == 0)
-		return -EINVAL;
-
-	/* For Vega, reserve and map two pages on doorbell BAR since SDMA
-	 * paging queue doorbell use the second page. The
-	 * AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the
-	 * doorbells are in the first page. So with paging queue enabled,
-	 * the max num_doorbells should + 1 page (0x400 in dword)
-	 */
-	if (adev->asic_type >= CHIP_VEGA10)
-		adev->doorbell.num_doorbells += 0x400;
+	if (adev->enable_mes) {
+		adev->doorbell.num_doorbells =
+			adev->doorbell.size / sizeof(u32);
+	} else {
+		adev->doorbell.num_doorbells =
+			min_t(u32, adev->doorbell.size / sizeof(u32),
+			      adev->doorbell_index.max_assignment+1);
+		if (adev->doorbell.num_doorbells == 0)
+			return -EINVAL;
+
+		/* For Vega, reserve and map two pages on doorbell BAR since SDMA
+		 * paging queue doorbell use the second page. The
+		 * AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the
+		 * doorbells are in the first page. So with paging queue enabled,
+		 * the max num_doorbells should + 1 page (0x400 in dword)
+		 */
+		if (adev->asic_type >= CHIP_VEGA10)
+			adev->doorbell.num_doorbells += 0x400;
+	}
 
 	adev->doorbell.ptr = ioremap(adev->doorbell.base,
 				     adev->doorbell.num_doorbells *
-- 
2.38.1