- 10 10月, 2017 1 次提交
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由 Christian Gmeiner 提交于
This commits extends etnaviv_gpu_cmdbuf_new(..) to define the number of struct etnaviv_perfmon elements gets used. Changes from v1 -> v2: - make use of goto as requested by Lucas Signed-off-by: NChristian Gmeiner <christian.gmeiner@gmail.com> Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
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- 02 2月, 2017 4 次提交
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由 Lucas Stach 提交于
There are 3 big benefits to suballocating a single big DMA buffer for command submission: 1. Avoid hammering CMA. The old way of allocating and freeing a DMA buffer for each submission was hitting some of the real slow pathes in CMA, as this allocator was not designed for a concurrent small buffers load. 2. Less TLB flushes on IOMMUv2. If a new command buffer is mapped into the GPU address space the MMU TLBs need to be flushed. By having one big buffer statically mapped to the GPU, a lot of those flushes can be avoided. 3. No funky workarounds for GC3000. The FE TLB flush on GC3000 isn't reliable. To work around that we tried to lay out the cmdbufs in the GPU address space in a way to avoid this issue. This hasn't always worked if the address space is crowded. A single statically mapped buffer avoids the erratum completely. Signed-off-by: NLucas Stach <l.stach@pengutronix.de> Reviewed-by: NChristian Gmeiner <christian.gmeiner@gmail.com>
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由 Lucas Stach 提交于
Don't allow IOMMUv2 to peek directly into the cmdbuf, but get the needed PA through a dedicated function. Signed-off-by: NLucas Stach <l.stach@pengutronix.de> Reviewed-by: NChristian Gmeiner <christian.gmeiner@gmail.com>
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由 Lucas Stach 提交于
Don't call the IOMMU directly, but go through the new cmdbuf abstraction. Signed-off-by: NLucas Stach <l.stach@pengutronix.de> Reviewed-by: NChristian Gmeiner <christian.gmeiner@gmail.com>
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由 Lucas Stach 提交于
This will get more complex with the following changes, so move it into its own place. Signed-off-by: NLucas Stach <l.stach@pengutronix.de> Reviewed-by: NChristian Gmeiner <christian.gmeiner@gmail.com>
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