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/gp106/hal_gp106.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/gpu/nvgpu/gp106/hal_gp106.c') diff --git a/drivers/gpu/nvgpu/gp106/hal_gp106.c b/drivers/gpu/nvgpu/gp106/hal_gp106.c index 77a1b8f6..502a6778 100644 --- a/drivers/gpu/nvgpu/gp106/hal_gp106.c +++ b/drivers/gpu/nvgpu/gp106/hal_gp106.c @@ -496,6 +496,7 @@ static const struct gpu_ops gp106_ops = { .get_syncpt_wait_cmd_size = gk20a_fifo_get_syncpt_wait_cmd_size, .add_syncpt_incr_cmd = gk20a_fifo_add_syncpt_incr_cmd, .get_syncpt_incr_cmd_size = gk20a_fifo_get_syncpt_incr_cmd_size, + .get_sync_ro_map = NULL, #endif .resetup_ramfc = gp10b_fifo_resetup_ramfc, .device_info_fault_id = top_device_info_data_fault_id_enum_v, -- cgit v1.2.2