Commit 05916bed authored by Christian Gmeiner's avatar Christian Gmeiner Committed by Lucas Stach
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drm/etnaviv: add uapi for perfmon feature 



Sadly we can not read any registers via command stream so we need
to extend the drm_etnaviv_gem_submit struct with performance monitor
requests. Those requests gets process before or after the actual
submitted command stream.

The Vivante kernel driver has a special ioctl to read all perfmon
registers at once and return it.

Changes from v1 -> v2:
- use a 16 bit value for signals
- fix padding issues

Signed-off-by: default avatarChristian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: default avatarLucas Stach <l.stach@pengutronix.de>
parent 9e2c2e27

include/uapi/drm/etnaviv_drm.h

+16 −0
Original line number Diff line number Diff line
@@ -150,6 +150,19 @@ struct drm_etnaviv_gem_submit_bo { 
	__u64 presumed;       /* in/out, presumed buffer address */

};



/* performance monitor request (pmr) */

#define ETNA_PM_PROCESS_PRE             0x0001

#define ETNA_PM_PROCESS_POST            0x0002

struct drm_etnaviv_gem_submit_pmr {

	__u32 flags;          /* in, when to process request (ETNA_PM_PROCESS_x) */

	__u8  domain;         /* in, pm domain */

	__u8  pad;

	__u16 signal;         /* in, pm signal */

	__u32 sequence;       /* in, sequence number */

	__u32 read_offset;    /* in, offset from read_bo */

	__u32 read_idx;       /* in, index of read_bo buffer */

};



/* Each cmdstream submit consists of a table of buffers involved, and

 * one or more cmdstream buffers.  This allows for conditional execution

 * (context-restore), and IB buffers needed for per tile/bin draw cmds.
@@ -175,6 +188,9 @@ struct drm_etnaviv_gem_submit { 
	__u64 stream;         /* in, ptr to cmdstream */

	__u32 flags;          /* in, mask of ETNA_SUBMIT_x */

	__s32 fence_fd;       /* in/out, fence fd (see ETNA_SUBMIT_FENCE_FD_x) */

	__u64 pmrs;           /* in, ptr to array of submit_pmr's */

	__u32 nr_pmrs;        /* in, number of submit_pmr's */

	__u32 pad;

};



/* The normal way to synchronize with the GPU is just to CPU_PREP on

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