From 1f0998baa796f4b25fd745536a8ad71356fb8048 Mon Sep 17 00:00:00 2001
From: Hristo Gueorguiev <prem.nirved@gmail.com>
Date: Thu, 8 Jun 2017 05:08:52 -0400
Subject: [PATCH] Cycles: Blacklist unsupported OpenCL devices

Due to various driver issues with AMD GCN 1 cards we can no longer support
these GPUs. This patch makes them unavailable to select for Cycles rendering.

GCN cards 2 and higher are still supported. Please use the most recent
drivers available to ensure proper functionality.

See here for a list to check which GPUs are supported:
https://en.wikipedia.org/wiki/List_of_AMD_graphics_processing_units
---
 intern/cycles/device/opencl/opencl.h        |  5 ++
 intern/cycles/device/opencl/opencl_util.cpp | 51 +++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/intern/cycles/device/opencl/opencl.h b/intern/cycles/device/opencl/opencl.h
index 52851061d7b..399fae9b42e 100644
--- a/intern/cycles/device/opencl/opencl.h
+++ b/intern/cycles/device/opencl/opencl.h
@@ -130,6 +130,11 @@ public:
 	                            cl_int* error = NULL);
 	static cl_device_type get_device_type(cl_device_id device_id);
 
+	static bool get_driver_version(cl_device_id device_id,
+	                               int *major,
+	                               int *minor,
+	                               cl_int* error = NULL);
+
 	static int mem_address_alignment(cl_device_id device_id);
 
 	/* Get somewhat more readable device name.
diff --git a/intern/cycles/device/opencl/opencl_util.cpp b/intern/cycles/device/opencl/opencl_util.cpp
index d27aa05c312..4c6de60e8aa 100644
--- a/intern/cycles/device/opencl/opencl_util.cpp
+++ b/intern/cycles/device/opencl/opencl_util.cpp
@@ -608,6 +608,14 @@ bool OpenCLInfo::device_supported(const string& platform_name,
 	if(!get_device_name(device_id, &device_name)) {
 		return false;
 	}
+
+	int driver_major = 0;
+	int driver_minor = 0;
+	if(!get_driver_version(device_id, &driver_major, &driver_minor)) {
+		return false;
+	}
+	VLOG(3) << "OpenCL driver version " << driver_major << "." << driver_minor;
+
 	/* It is possible tyo have Iris GPU on AMD/Apple OpenCL framework
 	 * (aka, it will not be on Intel framework). This isn't supported
 	 * and needs an explicit blacklist.
@@ -618,6 +626,21 @@ bool OpenCLInfo::device_supported(const string& platform_name,
 	if(platform_name == "AMD Accelerated Parallel Processing" &&
 	   device_type == CL_DEVICE_TYPE_GPU)
 	{
+		if(driver_major < 2348) {
+			VLOG(1) << "AMD driver version " << driver_major << "." << driver_minor << " not supported";
+			return false;
+		}
+		const char *blacklist[] = {
+			/* GCN 1 */
+			"Tahiti", "Pitcairn", "Capeverde", "Oland",
+			NULL
+		};
+		for (int i = 0; blacklist[i] != NULL; i++) {
+			if(device_name == blacklist[i]) {
+				VLOG(1) << "AMD device " << device_name << " not supported";
+				return false;
+			}
+		}
 		return true;
 	}
 	if(platform_name == "Apple" && device_type == CL_DEVICE_TYPE_GPU) {
@@ -1073,6 +1096,34 @@ string OpenCLInfo::get_readable_device_name(cl_device_id device_id)
 	return get_device_name(device_id);
 }
 
+bool OpenCLInfo::get_driver_version(cl_device_id device_id,
+                                    int *major,
+                                    int *minor,
+                                    cl_int* error)
+{
+	char buffer[1024];
+	cl_int err;
+	if((err = clGetDeviceInfo(device_id,
+	                          CL_DRIVER_VERSION,
+	                          sizeof(buffer),
+	                          &buffer,
+	                          NULL)) != CL_SUCCESS)
+	{
+		if(error != NULL) {
+			*error = err;
+		}
+		return false;
+	}
+	if(error != NULL) {
+		*error = CL_SUCCESS;
+	}
+	if(sscanf(buffer, "%d.%d", major, minor) < 2) {
+		VLOG(1) << string_printf("OpenCL: failed to parse driver version string (%s).", buffer);
+		return false;
+	}
+	return true;
+}
+
 int OpenCLInfo::mem_address_alignment(cl_device_id device_id)
 {
 	int base_align_bits;