gpu: nvgpu: remove dependency on linux header for sim_gk20a*

This patch removes linux dependencies from sim_gk20a.h under
gk20a/sim_gk20a.h. The following changes are made in this patch.

1) Created a linux based structure sim_gk20a_linux that contains a
common sim_gk20a struct inside it. The common struct sim_gk20a doesn't
contain any linux specific structs.
2) The common struct sim_gk20a contains an added function pointer which
is used to invoke gk20a_sim_esc_readl() method.
3) sim_gk20a.c is moved to nvgpu/common/linux along with a new header
sim_gk20a.h that contains the definition of struct sim_gk20a_linux.
4) struct gk20a now contains a pointer of sim_gk20a instead of the
entire object. The memory for this struct is allocated and  initialized during
gk20a_init_support() and freed during invocation of
gk20_remove_support().
5) We first obtain the pointer for struct sim_gk20a_linux from the
pointer of sim_gk20a using the container_of method in order to work on
the struct.

JIRA NVGPU-386

Change-Id: Ic82b8702642377f82694577a53c3ca0b9c1bb2ab
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1603073
GVS: Gerrit_Virtual_Submit
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 15 insertions, 8 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/module.c b/drivers/gpu/nvgpu/common/linux/module.c
index 4af62d5f..950b1581 100644
--- a/drivers/gpu/nvgpu/common/linux/module.c
+++ b/drivers/gpu/nvgpu/common/linux/module.c
@@ -47,6 +47,7 @@
 #include "intr.h"
 #include "cde.h"
 #include "ioctl.h"
+#include "sim_gk20a.h"
 #ifdef CONFIG_TEGRA_19x_GPU
 #include "nvgpu_gpuid_t19x.h"
 #ifdef CONFIG_TEGRA_GR_VIRTUALIZATION
@@ -637,11 +638,10 @@ void gk20a_remove_support(struct gk20a *g)
         if (g->mm.remove_support)
                 g->mm.remove_support(&g->mm);
 
-        if (g->sim.remove_support)
-                g->sim.remove_support(&g->sim);
+        if (g->sim->remove_support)
+                g->sim->remove_support(g->sim);
 
         /* free mappings to registers, etc */
-
         if (l->regs) {
                 iounmap(l->regs);
                 l->regs = NULL;
@@ -661,6 +661,11 @@ static int gk20a_init_support(struct platform_device *dev)
         int err = 0;
         struct gk20a *g = get_gk20a(&dev->dev);
         struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
+        struct sim_gk20a_linux *sim_linux = nvgpu_kzalloc(g, sizeof(*sim_linux));
+        if (!sim_linux)
+                goto fail;
+
+        g->sim = &sim_linux->sim;
 
         tegra_register_idle_unidle(gk20a_do_idle, gk20a_do_unidle, g);
 
@@ -681,13 +686,13 @@ static int gk20a_init_support(struct platform_device *dev)
         }
 
         if (nvgpu_platform_is_simulation(g)) {
-                g->sim.g = g;
-                g->sim.regs = gk20a_ioremap_resource(dev,
+                g->sim->g = g;
+                sim_linux->regs = gk20a_ioremap_resource(dev,
                                                      GK20A_SIM_IORESOURCE_MEM,
-                                                     &g->sim.reg_mem);
-                if (IS_ERR(g->sim.regs)) {
+                                                     &sim_linux->reg_mem);
+                if (IS_ERR(sim_linux->regs)) {
                         nvgpu_err(g, "failed to remap gk20a sim regs");
-                        err = PTR_ERR(g->sim.regs);
+                        err = PTR_ERR(sim_linux->regs);
                         goto fail;
                 }
 
@@ -703,6 +708,8 @@ static int gk20a_init_support(struct platform_device *dev)
         return 0;
 
 fail:
+        nvgpu_kfree(g, sim_linux);
+        g->sim = NULL;
         return err;
 }