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| author | Mika Kuoppala <mika.kuoppala@linux.intel.com> | 2017-09-22 15:43:07 +0300 |
|---|---|---|
| committer | Mika Kuoppala <mika.kuoppala@intel.com> | 2017-09-25 11:33:53 +0300 |
| commit | 76e70087d360fdbe97f24c205d585ada04126e5f (patch) | |
| tree | 2ad0fd9d5614b6d79367055577528318ececda1d /drivers/gpu/drm/i915/intel_ringbuffer.h | |
| parent | 7a62cc6107f31e119a0df6f79fa9fae566b1a22e (diff) | |
| download | linux-76e70087d360fdbe97f24c205d585ada04126e5f.tar.xz | |
drm/i915: Make execlist port count variable
As we emulate execlists on top of the GuC workqueue, it is not
restricted to just 2 ports and we can increase that number arbitrarily
to trade-off queue depth (i.e. scheduling latency) against pipeline
bubbles.
v2: rebase. better commit msg (Chris)
v3: rebase
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20170922124307.10914-5-mika.kuoppala@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_ringbuffer.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 0eae5936bc3c..56d7ae9f298b 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -234,7 +234,14 @@ struct intel_engine_execlists { * @context_id: context ID for port */ GEM_DEBUG_DECL(u32 context_id); - } port[2]; + +#define EXECLIST_MAX_PORTS 2 + } port[EXECLIST_MAX_PORTS]; + + /** + * @port_mask: number of execlist ports - 1 + */ + unsigned int port_mask; /** * @queue: queue of requests, in priority lists @@ -511,16 +518,22 @@ struct intel_engine_cs { u32 (*get_cmd_length_mask)(u32 cmd_header); }; +static inline unsigned int +execlists_num_ports(const struct intel_engine_execlists * const execlists) +{ + return execlists->port_mask + 1; +} + static inline void execlists_port_complete(struct intel_engine_execlists * const execlists, struct execlist_port * const port) { - struct execlist_port * const port1 = &execlists->port[1]; + const unsigned int m = execlists->port_mask; GEM_BUG_ON(port_index(port, execlists) != 0); - *port = *port1; - memset(port1, 0, sizeof(struct execlist_port)); + memmove(port, port + 1, m * sizeof(struct execlist_port)); + memset(port + m, 0, sizeof(struct execlist_port)); } static inline unsigned int |