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, 14 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/os_linux.h b/drivers/gpu/nvgpu/common/linux/os_linux.h
index 48479843..4a3128c3 100644
--- a/drivers/gpu/nvgpu/common/linux/os_linux.h
+++ b/drivers/gpu/nvgpu/common/linux/os_linux.h
@@ -18,6 +18,9 @@
 
 #include <linux/cdev.h>
 
+#ifdef CONFIG_TEGRA_19x_GPU
+#include <nvgpu/linux/os_linux_t19x.h>
+#endif
 #include "gk20a/gk20a.h"
 #include "cde.h"
 
@@ -85,6 +88,17 @@ struct nvgpu_os_linux {
         struct work_struct nonstall_fn_work;
         struct workqueue_struct *nonstall_work_queue;
 
+        struct resource *reg_mem;
+        void __iomem *regs;
+        void __iomem *regs_saved;
+
+        struct resource *bar1_mem;
+        void __iomem *bar1;
+        void __iomem *bar1_saved;
+
+#ifdef CONFIG_TEGRA_19x_GPU
+        struct nvgpu_os_linux_t19x t19x;
+#endif
 #ifdef CONFIG_DEBUG_FS
         struct dentry *debugfs;
         struct dentry *debugfs_alias;