msm: kgsl: Add a new API to allow sharing of GPU performance counters
Adreno uses programmable performance counters, meaning that while there
are a limited number of physical counters each counter can be programmed
to count a vast number of different measurements (we refer to these as
countables). This could cause problems if multiple apps want to use
the performance counters, so this API and infrastructure allows the
counters to be safely shared.
The kernel tracks which countable is selected for each of the physical
counters for each counter group (where groups closely match hardware
blocks). If the desired countable is already in use, or there is an
open physical counter, then the process is allowed to use the counter.
The get ioctl reserves the counter and returns the dword offset of the
register associated with that physical counter. The put ioctl
releases the physical counter. The query ioctl gets the countables
used for all of the counters in the block - up to 8 values can be
returned. The read ioctl gets the current hardware value in the counter
Change-Id: Ic0dedbadae1dedadba60f8a3e685e2ce7d84fb33
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>
diff --git a/include/linux/msm_kgsl.h b/include/linux/msm_kgsl.h
index b2bae10..e19f338 100644
--- a/include/linux/msm_kgsl.h
+++ b/include/linux/msm_kgsl.h
@@ -209,6 +209,26 @@
unsigned int dev_minor;
};
+/* Performance counter groups */
+
+#define KGSL_PERFCOUNTER_GROUP_CP 0x0
+#define KGSL_PERFCOUNTER_GROUP_RBBM 0x1
+#define KGSL_PERFCOUNTER_GROUP_PC 0x2
+#define KGSL_PERFCOUNTER_GROUP_VFD 0x3
+#define KGSL_PERFCOUNTER_GROUP_HLSQ 0x4
+#define KGSL_PERFCOUNTER_GROUP_VPC 0x5
+#define KGSL_PERFCOUNTER_GROUP_TSE 0x6
+#define KGSL_PERFCOUNTER_GROUP_RAS 0x7
+#define KGSL_PERFCOUNTER_GROUP_UCHE 0x8
+#define KGSL_PERFCOUNTER_GROUP_TP 0x9
+#define KGSL_PERFCOUNTER_GROUP_SP 0xA
+#define KGSL_PERFCOUNTER_GROUP_RB 0xB
+#define KGSL_PERFCOUNTER_GROUP_PWR 0xC
+#define KGSL_PERFCOUNTER_GROUP_VBIF 0xD
+#define KGSL_PERFCOUNTER_GROUP_VBIF_PWR 0xE
+
+#define KGSL_PERFCOUNTER_NOT_USED 0xFFFFFFFF
+
/* structure holds list of ibs */
struct kgsl_ibdesc {
unsigned int gpuaddr;
@@ -659,6 +679,110 @@
#define IOCTL_KGSL_GPUMEM_SYNC_CACHE \
_IOW(KGSL_IOC_TYPE, 0x37, struct kgsl_gpumem_sync_cache)
+/**
+ * struct kgsl_perfcounter_get - argument to IOCTL_KGSL_PERFCOUNTER_GET
+ * @groupid: Performance counter group ID
+ * @countable: Countable to select within the group
+ * @offset: Return offset of the reserved counter
+ *
+ * Get an available performance counter from a specified groupid. The offset
+ * of the performance counter will be returned after successfully assigning
+ * the countable to the counter for the specified group. An error will be
+ * returned and an offset of 0 if the groupid is invalid or there are no
+ * more counters left. After successfully getting a perfcounter, the user
+ * must call kgsl_perfcounter_put(groupid, contable) when finished with
+ * the perfcounter to clear up perfcounter resources.
+ *
+ */
+struct kgsl_perfcounter_get {
+ unsigned int groupid;
+ unsigned int countable;
+ unsigned int offset;
+/* private: reserved for future use */
+ unsigned int __pad[2]; /* For future binary compatibility */
+};
+
+#define IOCTL_KGSL_PERFCOUNTER_GET \
+ _IOWR(KGSL_IOC_TYPE, 0x38, struct kgsl_perfcounter_get)
+
+/**
+ * struct kgsl_perfcounter_put - argument to IOCTL_KGSL_PERFCOUNTER_PUT
+ * @groupid: Performance counter group ID
+ * @countable: Countable to release within the group
+ *
+ * Put an allocated performance counter to allow others to have access to the
+ * resource that was previously taken. This is only to be called after
+ * successfully getting a performance counter from kgsl_perfcounter_get().
+ *
+ */
+struct kgsl_perfcounter_put {
+ unsigned int groupid;
+ unsigned int countable;
+/* private: reserved for future use */
+ unsigned int __pad[2]; /* For future binary compatibility */
+};
+
+#define IOCTL_KGSL_PERFCOUNTER_PUT \
+ _IOW(KGSL_IOC_TYPE, 0x39, struct kgsl_perfcounter_put)
+
+/**
+ * struct kgsl_perfcounter_query - argument to IOCTL_KGSL_PERFCOUNTER_QUERY
+ * @groupid: Performance counter group ID
+ * @countable: Return active countables array
+ * @size: Size of active countables array
+ * @max_counters: Return total number counters for the group ID
+ *
+ * Query the available performance counters given a groupid. The array
+ * *countables is used to return the current active countables in counters.
+ * The size of the array is passed in so the kernel will only write at most
+ * size or counter->size for the group id. The total number of available
+ * counters for the group ID is returned in max_counters.
+ * If the array or size passed in are invalid, then only the maximum number
+ * of counters will be returned, no data will be written to *countables.
+ * If the groupid is invalid an error code will be returned.
+ *
+ */
+struct kgsl_perfcounter_query {
+ unsigned int groupid;
+ /* Array to return the current countable for up to size counters */
+ unsigned int *countables;
+ unsigned int count;
+ unsigned int max_counters;
+/* private: reserved for future use */
+ unsigned int __pad[2]; /* For future binary compatibility */
+};
+
+#define IOCTL_KGSL_PERFCOUNTER_QUERY \
+ _IOWR(KGSL_IOC_TYPE, 0x3A, struct kgsl_perfcounter_query)
+
+/**
+ * struct kgsl_perfcounter_query - argument to IOCTL_KGSL_PERFCOUNTER_QUERY
+ * @groupid: Performance counter group IDs
+ * @countable: Performance counter countable IDs
+ * @value: Return performance counter reads
+ * @size: Size of all arrays (groupid/countable pair and return value)
+ *
+ * Read in the current value of a performance counter given by the groupid
+ * and countable.
+ *
+ */
+
+struct kgsl_perfcounter_read_group {
+ unsigned int groupid;
+ unsigned int countable;
+ uint64_t value;
+};
+
+struct kgsl_perfcounter_read {
+ struct kgsl_perfcounter_read_group *reads;
+ unsigned int count;
+/* private: reserved for future use */
+ unsigned int __pad[2]; /* For future binary compatibility */
+};
+
+#define IOCTL_KGSL_PERFCOUNTER_READ \
+ _IOWR(KGSL_IOC_TYPE, 0x3B, struct kgsl_perfcounter_read)
+
#ifdef __KERNEL__
#ifdef CONFIG_MSM_KGSL_DRM
int kgsl_gem_obj_addr(int drm_fd, int handle, unsigned long *start,