[Intel-gfx] [PATCH i-g-t 1/5] i915: Start putting the mmio_base to wider use
Chris Wilson
chris at chris-wilson.co.uk
Mon Jan 27 12:18:14 UTC 2020
Several tests depend upon the implicit engine->mmio_base but have no
means of determining the physical layout. Since the kernel has started
providing this information, start putting it to use.
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
lib/i915/gem_engine_topology.c | 84 ++++++++++++++++++++++++++++++++++
lib/i915/gem_engine_topology.h | 5 ++
tests/i915/gem_ctx_shared.c | 38 +++++----------
tests/i915/gem_exec_latency.c | 17 ++++---
4 files changed, 111 insertions(+), 33 deletions(-)
diff --git a/lib/i915/gem_engine_topology.c b/lib/i915/gem_engine_topology.c
index 43a99e0ff..058983123 100644
--- a/lib/i915/gem_engine_topology.c
+++ b/lib/i915/gem_engine_topology.c
@@ -21,7 +21,12 @@
* IN THE SOFTWARE.
*/
+#include <fcntl.h>
+#include <unistd.h>
+
#include "drmtest.h"
+#include "igt_sysfs.h"
+#include "intel_chipset.h"
#include "ioctl_wrappers.h"
#include "i915/gem_engine_topology.h"
@@ -331,3 +336,82 @@ bool gem_engine_is_equal(const struct intel_execution_engine2 *e1,
{
return e1->class == e2->class && e1->instance == e2->instance;
}
+
+static int descend(int dir, const char *path)
+{
+ int fd;
+
+ fd = openat(dir, path, O_RDONLY);
+ close(dir);
+
+ return fd;
+}
+
+int gem_engine_property_scanf(int i915, const char *engine, const char *attr,
+ const char *fmt, ...)
+{
+ FILE *file;
+ va_list ap;
+ int ret;
+ int fd;
+
+ fd = igt_sysfs_open(i915);
+ if (fd < 0)
+ return fd;
+
+ fd = descend(fd, "engine");
+ if (fd < 0)
+ return fd;
+
+ fd = descend(fd, engine);
+ if (fd < 0)
+ return fd;
+
+ fd = descend(fd, attr);
+ if (fd < 0)
+ return fd;
+
+ file = fdopen(fd, "r");
+ if (!file) {
+ close(fd);
+ return -1;
+ }
+
+ va_start(ap, fmt);
+ ret = vfscanf(file, fmt, ap);
+ va_end(ap);
+
+ fclose(file);
+ return ret;
+}
+
+uint32_t gem_engine_mmio_base(int i915, const char *engine)
+{
+ unsigned int mmio = 0;
+
+ if (gem_engine_property_scanf(i915, engine, "mmio_base",
+ "%x", &mmio) < 0) {
+ int gen = intel_gen(intel_get_drm_devid(i915));
+
+ /* The layout of xcs1+ is unreliable -- hence the property! */
+ if (!strcmp(engine, "rcs0")) {
+ mmio = 0x2000;
+ } else if (!strcmp(engine, "bcs0")) {
+ mmio = 0x22000;
+ } else if (!strcmp(engine, "vcs0")) {
+ if (gen < 6)
+ mmio = 0x4000;
+ else if (gen < 11)
+ mmio = 0x12000;
+ else
+ mmio = 0x1c0000;
+ } else if (!strcmp(engine, "vecs0")) {
+ if (gen < 11)
+ mmio = 0x1a000;
+ else
+ mmio = 0x1c8000;
+ }
+ }
+
+ return mmio;
+}
diff --git a/lib/i915/gem_engine_topology.h b/lib/i915/gem_engine_topology.h
index e40d7ec83..7a2e21f66 100644
--- a/lib/i915/gem_engine_topology.h
+++ b/lib/i915/gem_engine_topology.h
@@ -72,4 +72,9 @@ struct intel_execution_engine2 gem_eb_flags_to_engine(unsigned int flags);
((e__) = intel_get_current_physical_engine(&i__)); \
intel_next_engine(&i__))
+__attribute__((format(scanf, 4, 5)))
+int gem_engine_property_scanf(int i915, const char *engine, const char *attr,
+ const char *fmt, ...);
+uint32_t gem_engine_mmio_base(int i915, const char *engine);
+
#endif /* GEM_ENGINE_TOPOLOGY_H */
diff --git a/tests/i915/gem_ctx_shared.c b/tests/i915/gem_ctx_shared.c
index 30e37c3cc..6fc3f8cd8 100644
--- a/tests/i915/gem_ctx_shared.c
+++ b/tests/i915/gem_ctx_shared.c
@@ -38,6 +38,7 @@
#include <drm.h>
+#include "i915/gem_engine_topology.h"
#include "igt_rand.h"
#include "igt_vgem.h"
#include "sync_file.h"
@@ -548,6 +549,14 @@ static uint32_t store_timestamp(int i915,
return obj.handle;
}
+static uint32_t ring_base(int i915, unsigned ring)
+{
+ if (ring == I915_EXEC_DEFAULT)
+ ring = I915_EXEC_RENDER; /* XXX */
+
+ return gem_engine_mmio_base(i915, gem_eb_flags_to_engine(ring).name);
+}
+
static void independent(int i915, unsigned ring, unsigned flags)
{
const int TIMESTAMP = 1023;
@@ -555,33 +564,8 @@ static void independent(int i915, unsigned ring, unsigned flags)
igt_spin_t *spin[MAX_ELSP_QLEN];
unsigned int mmio_base;
- /* XXX i915_query()! */
- switch (ring) {
- case I915_EXEC_DEFAULT:
- case I915_EXEC_RENDER:
- mmio_base = 0x2000;
- break;
-#if 0
- case I915_EXEC_BSD:
- mmio_base = 0x12000;
- break;
-#endif
- case I915_EXEC_BLT:
- mmio_base = 0x22000;
- break;
-
-#define GEN11_VECS0_BASE 0x1c8000
-#define GEN11_VECS1_BASE 0x1d8000
- case I915_EXEC_VEBOX:
- if (intel_gen(intel_get_drm_devid(i915)) >= 11)
- mmio_base = GEN11_VECS0_BASE;
- else
- mmio_base = 0x1a000;
- break;
-
- default:
- igt_skip("mmio base not known\n");
- }
+ mmio_base = ring_base(i915, ring);
+ igt_require_f(mmio_base, "mmio base not known\n");
for (int n = 0; n < ARRAY_SIZE(spin); n++) {
const struct igt_spin_factory opts = {
diff --git a/tests/i915/gem_exec_latency.c b/tests/i915/gem_exec_latency.c
index 3d99182a0..d2159f317 100644
--- a/tests/i915/gem_exec_latency.c
+++ b/tests/i915/gem_exec_latency.c
@@ -109,7 +109,7 @@ poll_ring(int fd, unsigned ring, const char *name)
igt_spin_free(fd, spin[0]);
}
-#define RCS_TIMESTAMP (0x2000 + 0x358)
+#define TIMESTAMP (0x358)
static void latency_on_ring(int fd,
unsigned ring, const char *name,
unsigned flags)
@@ -119,6 +119,7 @@ static void latency_on_ring(int fd,
struct drm_i915_gem_exec_object2 obj[3];
struct drm_i915_gem_relocation_entry reloc;
struct drm_i915_gem_execbuffer2 execbuf;
+ const uint32_t mmio_base = gem_engine_mmio_base(fd, name);
igt_spin_t *spin = NULL;
IGT_CORK_HANDLE(c);
volatile uint32_t *reg;
@@ -128,7 +129,8 @@ static void latency_on_ring(int fd,
double gpu_latency;
int i, j;
- reg = (volatile uint32_t *)((volatile char *)igt_global_mmio + RCS_TIMESTAMP);
+ igt_require(mmio_base);
+ reg = (volatile uint32_t *)((volatile char *)igt_global_mmio + mmio_base + TIMESTAMP);
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = to_user_pointer(&obj[1]);
@@ -176,7 +178,7 @@ static void latency_on_ring(int fd,
map[i++] = 0x24 << 23 | 1;
if (has_64bit_reloc)
map[i-1]++;
- map[i++] = RCS_TIMESTAMP; /* ring local! */
+ map[i++] = mmio_base + TIMESTAMP;
map[i++] = offset;
if (has_64bit_reloc)
map[i++] = offset >> 32;
@@ -266,11 +268,14 @@ static void latency_from_ring(int fd,
struct drm_i915_gem_exec_object2 obj[3];
struct drm_i915_gem_relocation_entry reloc;
struct drm_i915_gem_execbuffer2 execbuf;
+ const uint32_t mmio_base = gem_engine_mmio_base(fd, name);
const unsigned int repeats = ring_size / 2;
uint32_t *map, *results;
uint32_t ctx[2] = {};
int i, j;
+ igt_require(mmio_base);
+
if (flags & PREEMPT) {
ctx[0] = gem_context_create(fd);
gem_context_set_priority(fd, ctx[0], -1023);
@@ -351,7 +356,7 @@ static void latency_from_ring(int fd,
map[i++] = 0x24 << 23 | 1;
if (has_64bit_reloc)
map[i-1]++;
- map[i++] = RCS_TIMESTAMP; /* ring local! */
+ map[i++] = mmio_base + TIMESTAMP;
map[i++] = offset;
if (has_64bit_reloc)
map[i++] = offset >> 32;
@@ -376,7 +381,7 @@ static void latency_from_ring(int fd,
map[i++] = 0x24 << 23 | 1;
if (has_64bit_reloc)
map[i-1]++;
- map[i++] = RCS_TIMESTAMP; /* ring local! */
+ map[i++] = mmio_base + TIMESTAMP;
map[i++] = offset;
if (has_64bit_reloc)
map[i++] = offset >> 32;
@@ -669,7 +674,7 @@ igt_main
ring_size = 1024;
intel_register_access_init(&mmio_data, intel_get_pci_device(), false, device);
- rcs_clock = clockrate(device, RCS_TIMESTAMP);
+ rcs_clock = clockrate(device, 0x2000 + TIMESTAMP);
igt_info("RCS timestamp clock: %.0fKHz, %.1fns\n",
rcs_clock / 1e3, 1e9 / rcs_clock);
rcs_clock = 1e9 / rcs_clock;
--
2.25.0
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