From 0f9bf924b2be88502c9920ace258c27e0172e3d5 Mon Sep 17 00:00:00 2001 From: Alex Waterman Date: Fri, 23 May 2014 13:29:53 -0700 Subject: gpu: nvgpu: Remove GPU MMIO access on power/rail gate This is to weed out accesses to the GPU while it is gated. Otherwise the accesses are silently dropped or cause a HW hang (on older chips). Bug 1514949 Change-Id: Ice4cdb9f1f736978ebb3db847f39c7439bf98134 Signed-off-by: Alex Waterman Reviewed-on: http://git-master/r/416339 Reviewed-by: Mitch Luban --- drivers/gpu/nvgpu/gk20a/gk20a.h | 5 +++++ 1 file changed, 5 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 991891c5..3871eb17 100644 --- a/drivers/gpu/nvgpu/gk20a/gk20a.h +++ b/drivers/gpu/nvgpu/gk20a/gk20a.h @@ -232,9 +232,11 @@ struct gk20a { struct resource *reg_mem; void __iomem *regs; + void __iomem *regs_saved; struct resource *bar1_mem; void __iomem *bar1; + void __iomem *bar1_saved; bool power_on; @@ -487,6 +489,9 @@ static inline void gk20a_mem_wr32(void *ptr, int w, u32 data) } /* register accessors */ +int gk20a_lockout_registers(struct gk20a *g); +int gk20a_restore_registers(struct gk20a *g); + static inline void gk20a_writel(struct gk20a *g, u32 r, u32 v) { gk20a_dbg(gpu_dbg_reg, " r=0x%x v=0x%x", r, v); -- cgit v1.2.2