summaryrefslogtreecommitdiff
path: root/lib/i915
diff options
context:
space:
mode:
Diffstat (limited to 'lib/i915')
-rw-r--r--lib/i915/gem_ring.c117
-rw-r--r--lib/i915/gem_ring.h36
2 files changed, 153 insertions, 0 deletions
diff --git a/lib/i915/gem_ring.c b/lib/i915/gem_ring.c
new file mode 100644
index 00000000..7326673a
--- /dev/null
+++ b/lib/i915/gem_ring.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "gem_ring.h"
+
+#include <signal.h>
+#include <sys/ioctl.h>
+
+#include "intel_reg.h"
+#include "drmtest.h"
+#include "ioctl_wrappers.h"
+#include "igt_dummyload.h"
+
+static void alarm_handler(int sig)
+{
+}
+
+/**
+ * gem_measure_ring_inflight:
+ * @fd: open i915 drm file descriptor
+ * @engine: execbuf engine flag
+ * @flags: flags to affect measurement:
+ * - MEASURE_RING_NEW_CTX: use a new context to account for the space
+ * used by the lrc init.
+ *
+ * This function calculates the maximum number of batches that can be inserted
+ * at the same time in the ring on the selected engine.
+ *
+ * Returns:
+ * Number of batches that fit in the ring
+ */
+unsigned int
+gem_measure_ring_inflight(int fd, unsigned int engine, enum measure_ring_flags flags)
+{
+ struct sigaction old_sa, sa = { .sa_handler = alarm_handler };
+ struct drm_i915_gem_exec_object2 obj[2];
+ struct drm_i915_gem_execbuffer2 execbuf;
+ const uint32_t bbe = MI_BATCH_BUFFER_END;
+ unsigned int count, last;
+ struct itimerval itv;
+ IGT_CORK_HANDLE(cork);
+
+ memset(obj, 0, sizeof(obj));
+ obj[1].handle = gem_create(fd, 4096);
+ gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe));
+
+ memset(&execbuf, 0, sizeof(execbuf));
+ execbuf.buffers_ptr = to_user_pointer(&obj[1]);
+ execbuf.buffer_count = 1;
+ execbuf.flags = engine;
+ gem_execbuf(fd, &execbuf);
+ gem_sync(fd, obj[1].handle);
+
+ obj[0].handle = igt_cork_plug(&cork, fd);
+
+ execbuf.buffers_ptr = to_user_pointer(obj);
+ execbuf.buffer_count = 2;
+
+ if (flags & MEASURE_RING_NEW_CTX)
+ execbuf.rsvd1 = gem_context_create(fd);
+
+ sigaction(SIGALRM, &sa, &old_sa);
+ itv.it_interval.tv_sec = 0;
+ itv.it_interval.tv_usec = 100;
+ itv.it_value.tv_sec = 0;
+ itv.it_value.tv_usec = 1000;
+ setitimer(ITIMER_REAL, &itv, NULL);
+
+ last = -1;
+ count = 0;
+ do {
+ if (ioctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf) == 0) {
+ count++;
+ continue;
+ }
+
+ if (last == count)
+ break;
+
+ last = count;
+ } while (1);
+
+ memset(&itv, 0, sizeof(itv));
+ setitimer(ITIMER_REAL, &itv, NULL);
+ sigaction(SIGALRM, &old_sa, NULL);
+
+ igt_cork_unplug(&cork);
+ gem_close(fd, obj[0].handle);
+ gem_close(fd, obj[1].handle);
+
+ if (flags & MEASURE_RING_NEW_CTX)
+ gem_context_destroy(fd, execbuf.rsvd1);
+
+ gem_quiescent_gpu(fd);
+
+ return count;
+}
diff --git a/lib/i915/gem_ring.h b/lib/i915/gem_ring.h
new file mode 100644
index 00000000..c69adce0
--- /dev/null
+++ b/lib/i915/gem_ring.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef GEM_RING_H
+#define GEM_RING_H
+
+#include <stdbool.h>
+
+enum measure_ring_flags {
+ MEASURE_RING_NEW_CTX = 1
+};
+
+unsigned int
+gem_measure_ring_inflight(int fd, unsigned int engine, enum measure_ring_flags flags);
+
+#endif /* GEM_RING_H */