From be3750bc9eb60f8696c20b7298cc282eea17ac1b Mon Sep 17 00:00:00 2001 From: Terje Bergstrom Date: Wed, 27 Sep 2017 13:21:44 -0700 Subject: gpu: nvgpu: Abstract IO aperture accessors Add abstraction of IO aperture accessors. Add new functions gk20a_io_exists() and gk20a_io_valid_reg() to remove dependencies to aperture fields from common code. Implement Linux version of the abstraction by moving gk20a_readl() and gk20a_writel() to new Linux specific io.c. Move the fields defining IO aperture to nvgpu_os_linux. Add t19x specific IO aperture initialization functions and add t19x specific section to nvgpu_os_linux. JIRA NVGPU-259 Change-Id: I09e79cda60d11a20d1099a9aaa6d2375236e94ce Signed-off-by: Terje Bergstrom Reviewed-on: https://git-master.nvidia.com/r/1569698 Reviewed-by: mobile promotions Tested-by: mobile promotions --- drivers/gpu/nvgpu/gk20a/gk20a.c | 26 -------------------------- 1 file changed, 26 deletions(-) (limited to 'drivers/gpu/nvgpu/gk20a/gk20a.c') diff --git a/drivers/gpu/nvgpu/gk20a/gk20a.c b/drivers/gpu/nvgpu/gk20a/gk20a.c index cac62db7..a4becda0 100644 --- a/drivers/gpu/nvgpu/gk20a/gk20a.c +++ b/drivers/gpu/nvgpu/gk20a/gk20a.c @@ -65,32 +65,6 @@ void __nvgpu_check_gpu_state(struct gk20a *g) } } -/* - * Locks out the driver from accessing GPU registers. This prevents access to - * thse registers after the GPU has been clock or power gated. This should help - * find annoying bugs where register reads and writes are silently dropped - * after the GPU has been turned off. On older chips these reads and writes can - * also lock the entire CPU up. - */ -int gk20a_lockout_registers(struct gk20a *g) -{ - g->regs = NULL; - g->bar1 = NULL; - - return 0; -} - -/* - * Undoes gk20a_lockout_registers(). - */ -int gk20a_restore_registers(struct gk20a *g) -{ - g->regs = g->regs_saved; - g->bar1 = g->bar1_saved; - - return 0; -} - void __gk20a_warn_on_no_regs(void) { WARN_ONCE(1, "Attempted access to GPU regs after unmapping!"); -- cgit v1.2.2