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 <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1569698
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c b/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
index 9010c4a3..73a67d91 100644
--- a/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
+++ b/drivers/gpu/nvgpu/vgpu/fifo_vgpu.c
@@ -268,6 +268,7 @@ clean_up_runlist:
 
 static int vgpu_init_fifo_setup_sw(struct gk20a *g)
 {
+        struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
         struct fifo_gk20a *f = &g->fifo;
         struct device *d = dev_from_gk20a(g);
         struct vgpu_priv_data *priv = vgpu_get_priv_data(g);
@@ -305,7 +306,7 @@ static int vgpu_init_fifo_setup_sw(struct gk20a *g)
                 /* if reduced BAR1 range is specified, use offset of 0
                  * (server returns offset assuming full BAR1 range)
                  */
-                if (resource_size(g->bar1_mem) ==
+                if (resource_size(l->bar1_mem) ==
                                 (resource_size_t)f->userd.size)
                         f->userd.gpu_va = 0;
         }