linux-dev/drivers/gpu/drm/etnaviv/etnaviv_cmdbuf.h, branch linus/master

drm/etnaviv: rework MMU handling

2019-08-15T08:56:45Z

This reworks the MMU handling to make it possible to have multiple MMU contexts. A context is basically one instance of GPU page tables. Currently we have one set of page tables per GPU, which isn't all that clever, as it has the following two consequences: 1. All GPU clients (aka processes) are sharing the same pagetables, which means there is no isolation between clients, but only between GPU assigned memory spaces and the rest of the system. Better than nothing, but also not great. 2. Clients operating on the same set of buffers with different etnaviv GPU cores, e.g. a workload using both the 2D and 3D GPU, need to map the used buffers into the pagetable sets of each used GPU. This patch reworks all the MMU handling to introduce the abstraction of the MMU context. A context can be shared across different GPU cores, as long as they have compatible MMU implementations, which is the case for all systems with Vivante GPUs seen in the wild. As MMUv1 is not able to change pagetables on the fly, without a "stop the world" operation, which stops GPU, changes pagetables via CPU interaction, restarts GPU, the implementation introduces a shared context on MMUv1, which is returned whenever there is a request for a new context. This patch assigns a MMU context to each GPU, so on MMUv2 systems there is still one set of pagetables per GPU, but due to the shared context MMUv1 systems see a change in behavior as now a single pagetable set is used across all GPU cores. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel Reviewed-by: Guido Günther

drm/etnaviv: share a single cmdbuf suballoc region across all GPUs

2019-08-15T08:55:30Z

There is no need for each GPU to have it's own cmdbuf suballocation region. Only allocate a single one for the the etnaviv virtual device and share it across all GPUs. As the suballoc space is now potentially shared by more hardware jobs running in parallel, double its size to 512KB to avoid contention. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel Reviewed-by: Guido Günther

drm/etnaviv: split out cmdbuf mapping into address space

2019-08-15T08:55:03Z

This allows to decouple the cmdbuf suballocator create and mapping the region into the GPU address space. Allowing multiple AS to share a single cmdbuf suballoc. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel Reviewed-by: Guido Günther

drm/etnaviv: move job context pointer to etnaviv_gem_submit

2019-01-07T15:10:20Z

The context isn't really related to the cmdbuf, but is a property of the job. This has been missed when moving to a properly refcounted etnaviv_gem_submit. Signed-off-by: Lucas Stach Reviewed-by: Christian Gmeiner

drm/etnaviv: replace license text with SPDX tags

2018-05-18T13:27:56Z

This replaces the repetitive GPL-2.0 license text in code and header files with the SPDX tags. Generated hardware headers aren't changed, as any changes there need to be done in the upstream rnndb repository. Signed-off-by: Lucas Stach Reviewed-by: Christian Gmeiner

drm/etnaviv: move cmdbuf into submit object

2018-01-02T16:33:36Z

Less dynamic allocations and slims down the cmdbuf object to only the required information, as everything else is already available in the submit object. This also simplifies buffer and mappings lifetime management, as they are now exlusively attached to the submit object and not additionally to the cmdbuf. Signed-off-by: Lucas Stach

drm/etnaviv: move exec_state to submit object

2018-01-02T16:32:40Z

We'll need this in some places where only the submit is available. Also this is a first step at slimming down the cmdbuf object. Signed-off-by: Lucas Stach

drm/etnaviv: move PMRs to submit object

2018-01-02T16:31:59Z

To make them available to the event worker even after the actual command stream execution has finished. Signed-off-by: Lucas Stach

drm/etnaviv: extend etnaviv_gpu_cmdbuf_new(..) with nr_pmrs

2017-10-10T09:45:43Z

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: Christian Gmeiner Signed-off-by: Lucas Stach

drm/etnaviv: add internal representation of perfmon_request

2017-10-10T09:45:42Z

Signed-off-by: Christian Gmeiner Signed-off-by: Lucas Stach