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: Christian Gmeiner <christian.gmeiner@gmail.com> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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@ -150,6 +150,19 @@ struct drm_etnaviv_gem_submit_bo {
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__u64 presumed; /* in/out, presumed buffer address */
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};
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/* performance monitor request (pmr) */
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#define ETNA_PM_PROCESS_PRE 0x0001
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#define ETNA_PM_PROCESS_POST 0x0002
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struct drm_etnaviv_gem_submit_pmr {
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__u32 flags; /* in, when to process request (ETNA_PM_PROCESS_x) */
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__u8 domain; /* in, pm domain */
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__u8 pad;
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__u16 signal; /* in, pm signal */
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__u32 sequence; /* in, sequence number */
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__u32 read_offset; /* in, offset from read_bo */
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__u32 read_idx; /* in, index of read_bo buffer */
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};
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/* Each cmdstream submit consists of a table of buffers involved, and
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* one or more cmdstream buffers. This allows for conditional execution
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* (context-restore), and IB buffers needed for per tile/bin draw cmds.
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@ -175,6 +188,9 @@ struct drm_etnaviv_gem_submit {
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__u64 stream; /* in, ptr to cmdstream */
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__u32 flags; /* in, mask of ETNA_SUBMIT_x */
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__s32 fence_fd; /* in/out, fence fd (see ETNA_SUBMIT_FENCE_FD_x) */
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__u64 pmrs; /* in, ptr to array of submit_pmr's */
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__u32 nr_pmrs; /* in, number of submit_pmr's */
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__u32 pad;
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};
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/* The normal way to synchronize with the GPU is just to CPU_PREP on
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