libhsakmt: Query KFD version once after opening /dev/kfd

Query the KFD interface version once and store it in a global variable.
This makes it more efficient for KFD APIs to query the API version
later.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Change-Id: I267f3465f754e78fb21a7c42c5877cd68eaa9d05


[ROCm/ROCR-Runtime commit: 43ce63b68b]

projects/rocr-runtime/src/libhsakmt.h

@@ -38,6 +38,8 @@ extern bool hsakmt_forked;
 extern pthread_mutex_t hsakmt_mutex;
 extern bool is_dgpu;
 
+extern HsaVersionInfo kfd_version_info;
+
 extern int force_asic;
 extern char force_asic_name[HSA_PUBLIC_NAME_SIZE];
 extern struct hsa_gfxip_table force_asic_entry;
@@ -54,6 +56,10 @@ extern struct hsa_gfxip_table force_asic_entry;
 #define CHECK_KFD_OPEN() \
 	do { if (kfd_open_count == 0 || hsakmt_forked) return HSAKMT_STATUS_KERNEL_IO_CHANNEL_NOT_OPENED; } while (0)
 
+#define CHECK_KFD_MINOR_VERSION(minor)					\
+	do { if ((minor) > kfd_version_info.KernelInterfaceMinorVersion)\
+		return HSAKMT_STATUS_NOT_SUPPORTED; } while (0)
+
 extern int PAGE_SIZE;
 extern int PAGE_SHIFT;
 
@@ -145,6 +151,8 @@ struct hsa_gfxip_table {
 	enum asic_family_type asic_family;	// Device family id
 };
 
+HSAKMT_STATUS init_kfd_version(void);
+
 #define IS_SOC15(chip) ((chip) >= CHIP_VEGA10)
 
 HSAKMT_STATUS validate_nodeid(uint32_t nodeid, uint32_t *gpu_id);

projects/rocr-runtime/src/openclose.c

@@ -196,6 +196,10 @@ HSAKMT_STATUS HSAKMTAPI hsaKmtOpenKFD(void)
 
 		init_page_size();
 
+		result = init_kfd_version();
+		if (result != HSAKMT_STATUS_SUCCESS)
+			goto kfd_version_failed;
+
 		result = topology_sysfs_get_system_props(&sys_props);
 		if (result != HSAKMT_STATUS_SUCCESS)
 			goto topology_sysfs_failed;
@@ -238,6 +242,7 @@ init_doorbell_failed:
 	fmm_destroy_process_apertures();
 init_process_aperture_failed:
 topology_sysfs_failed:
+kfd_version_failed:
 	close(fd);
 open_failed:
 	pthread_mutex_unlock(&hsakmt_mutex);

projects/rocr-runtime/src/version.c

@@ -28,17 +28,29 @@
 #include <string.h>
 #include "linux/kfd_ioctl.h"
 
+HsaVersionInfo kfd_version_info;
+
 HSAKMT_STATUS HSAKMTAPI hsaKmtGetVersion(HsaVersionInfo *VersionInfo)
 {
 	CHECK_KFD_OPEN();
 
+	*VersionInfo = kfd_version_info;
+
+	return HSAKMT_STATUS_SUCCESS;
+}
+
+HSAKMT_STATUS init_kfd_version(void)
+{
 	struct kfd_ioctl_get_version_args args = {0};
 
 	if (kmtIoctl(kfd_fd, AMDKFD_IOC_GET_VERSION, &args) == -1)
 		return HSAKMT_STATUS_ERROR;
 
-	VersionInfo->KernelInterfaceMajorVersion = args.major_version;
-	VersionInfo->KernelInterfaceMinorVersion = args.minor_version;
+	kfd_version_info.KernelInterfaceMajorVersion = args.major_version;
+	kfd_version_info.KernelInterfaceMinorVersion = args.minor_version;
+
+	if (args.major_version != 1)
+		return HSAKMT_STATUS_DRIVER_MISMATCH;
 
 	return HSAKMT_STATUS_SUCCESS;
 }