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

drm/etnaviv: implement softpin

2019-08-15T10:07:47Z

With softpin we allow the userspace to take control over the GPU virtual address space. The new capability is relected by a bump of the minor DRM version. There are a few restrictions for userspace to take into account: 1. The kernel reserves a bit of the address space to implement zero page faulting and mapping of the kernel internal ring buffer. Userspace can query the kernel for the first usable GPU VM address via ETNAVIV_PARAM_SOFTPIN_START_ADDR. 2. We only allow softpin on GPUs, which implement proper process separation via PPAS. If softpin is not available the softpin start address will be set to ~0. 3. Softpin is all or nothing. A submit using softpin must not use any address fixups via relocs. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel Reviewed-by: Guido Günther

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: fix etnaviv_cmdbuf_suballoc_new return value

2019-08-09T09:06:38Z

The call site expects to get either a valid suballoc or an error pointer, so a NULL return will not be treated as an error. Make sure to always return a proper error pointer in case something goes wrong. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel Reviewed-by: Guido Günther

drm/etnaviv: drop use of drmP.h

2019-08-02T17:14:51Z

Drop use of the deprecated drmP.h header file. Fix fallout in all .c files. The etnaviv_drv.h header file was made self-contained, and missing includes was then added to the .c files that needed them. In a few cases the list of include files was sorted. Signed-off-by: Sam Ravnborg Cc: Lucas Stach Cc: Russell King Cc: Christian Gmeiner Cc: David Airlie Cc: Daniel Vetter Cc: etnaviv@lists.freedesktop.org Signed-off-by: Lucas Stach

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 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