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Use environment variable to force gfx version

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For experimental purpose, we need an option to change compute capability
by forcing the GfxIp version. This patch allows to use environment
variable HSA_OVERRIDE_GFX_VERSION=major.minor.stepping to replace the
default version. For example:
export HSA_OVERRIDE_GFX_VERSION=9.0.1

Change-Id: I90cfbd43619d9d3aebf53321d4e058f01bcd7088
Signed-off-by: Amber Lin <Amber.Lin@amd.com>
This commit is contained in:
Amber Lin
2017-06-22 12:12:17 -04:00
parent 5b3c9f0b31
commit 13aadde56e
1 changed files with 22 additions and 7 deletions
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src/topology.c
+22 -7
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@@ -73,7 +73,6 @@ static const char *supported_processor_vendor_name[] = {
static HSAKMT_STATUS topology_take_snapshot(void);
static HSAKMT_STATUS topology_drop_snapshot(void);
//static int get_cpu_stepping(uint16_t* stepping);
static struct hsa_gfxip_table {
uint16_t device_id; // Device ID
@@ -706,11 +705,11 @@ HSAKMT_STATUS topology_sysfs_get_node_props(uint32_t node_id,
struct pci_access *pacc)
{
FILE *fd;
char *read_buf, *p;
char *read_buf, *p, *envvar, dummy;
char prop_name[256];
char path[256];
unsigned long long prop_val;
uint32_t i, prog;
uint32_t i, prog, major, minor, step;
uint16_t fw_version = 0;
int read_size;
const struct hsa_gfxip_table *hsa_gfxip;
@@ -802,7 +801,6 @@ HSAKMT_STATUS topology_sysfs_get_node_props(uint32_t node_id,
}
// get_cpu_stepping(&stepping);
props->EngineId.ui32.uCode = fw_version & 0x3ff;
props->EngineId.ui32.Major = 0;
props->EngineId.ui32.Minor = 0;
@@ -810,9 +808,26 @@ HSAKMT_STATUS topology_sysfs_get_node_props(uint32_t node_id,
hsa_gfxip = find_hsa_gfxip_device(props->DeviceId);
if (hsa_gfxip) {
props->EngineId.ui32.Major = hsa_gfxip->major & 0x3f;
props->EngineId.ui32.Minor = hsa_gfxip->minor;
props->EngineId.ui32.Stepping = hsa_gfxip->stepping;
envvar = getenv("HSA_OVERRIDE_GFX_VERSION");
if (envvar) {
/* HSA_OVERRIDE_GFX_VERSION=major.minor.stepping */
if ((sscanf(envvar, "%u.%u.%u%c",
&major, &minor, &step, &dummy) != 3) ||
(major > 63 || minor > 255 || step > 255)) {
fprintf(stderr,
"HSA_OVERRIDE_GFX_VERSION %s is invalid\n",
envvar);
ret = HSAKMT_STATUS_ERROR;
goto err;
}
props->EngineId.ui32.Major = major & 0x3f;
props->EngineId.ui32.Minor = minor & 0xff;
props->EngineId.ui32.Stepping = step & 0xff;
} else {
props->EngineId.ui32.Major = hsa_gfxip->major & 0x3f;
props->EngineId.ui32.Minor = hsa_gfxip->minor;
props->EngineId.ui32.Stepping = hsa_gfxip->stepping;
}
if (!hsa_gfxip->amd_name) {
ret = HSAKMT_STATUS_ERROR;