From f0cbe19b12524f5df6466eaf86acbfb349def6b1 Mon Sep 17 00:00:00 2001 From: Deepak Nibade Date: Tue, 16 Jan 2018 03:07:37 -0800 Subject: gpu: nvgpu: add user API to get read-only syncpoint address map Add User space API NVGPU_AS_IOCTL_GET_SYNC_RO_MAP to get read-only syncpoint address map in user space We already map whole syncpoint shim to each address space with base address being vm->syncpt_ro_map_gpu_va This new API exposes this base GPU_VA address of syncpoint map, and unit size of each syncpoint to user space. User space can then calculate address of each syncpoint as syncpoint_address = base_gpu_va + (syncpoint_id * syncpoint_unit_size) Note that this syncpoint address is read_only, and should be only used for inserting semaphore acquires. Adding semaphore release with this address would result in MMU_FAULT Define new HAL g->ops.fifo.get_sync_ro_map and set this for all GPUs supported on Xavier SoC Bug 200327559 Change-Id: Ica0db48fc28fdd0ff2a5eb09574dac843dc5e4fd Signed-off-by: Deepak Nibade Reviewed-on: https://git-master.nvidia.com/r/1649365 Reviewed-by: svc-mobile-coverity GVS: Gerrit_Virtual_Submit Reviewed-by: Terje Bergstrom Reviewed-by: mobile promotions Tested-by: mobile promotions --- drivers/gpu/nvgpu/gk20a/gk20a.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/nvgpu/gk20a/gk20a.h') diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.h b/drivers/gpu/nvgpu/gk20a/gk20a.h index 5e46344a..02c7d0d9 100644 --- a/drivers/gpu/nvgpu/gk20a/gk20a.h +++ b/drivers/gpu/nvgpu/gk20a/gk20a.h @@ -617,6 +617,8 @@ struct gpu_ops { bool wfi_cmd, struct priv_cmd_entry *cmd, u32 id, u64 gpu_va); u32 (*get_syncpt_incr_cmd_size)(bool wfi_cmd); + int (*get_sync_ro_map)(struct vm_gk20a *vm, + u64 *base_gpuva, u32 *sync_size); #endif } fifo; struct pmu_v { -- cgit v1.2.2