gpu: nvgpu: remove circular dependency between hal.c and gk20a/

gk20a/hal.c depends on HAL init functions in all chips. But all chips
also depend on gk20a. That creates a circular dependency. In order to
solve the above, move gpu_init_hal and gk20a_detect_chip to
common/init/hal_init.c. These methods are declared in
include/nvgpu/hal_init.h. Also, the above methods are renamed to
nvgpu_init_hal and nvgpu_detect_chip respectively.

Jira NVGPU-613

Change-Id: Ib0df90287d4491571e4751475739b75fabd1041b
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1827576
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/Makefile

@@ -203,6 +203,7 @@ nvgpu-y += \
 	common/vbios/bios.o \
 	common/falcon/falcon.o \
 	common/falcon/falcon_queue.o \
+	common/init/hal_init.o \
 	common/pmu/pmu.o \
 	common/pmu/pmu_ipc.o \
 	common/pmu/pmu_fw.o \
@@ -237,7 +238,6 @@ nvgpu-y += \
 	gk20a/fence_gk20a.o \
 	gk20a/gr_ctx_gk20a_sim.o \
 	gk20a/gr_ctx_gk20a.o \
-	gk20a/hal.o \
 	gk20a/tsg_gk20a.o \
 	gk20a/fecs_trace_gk20a.o \
 	gm20b/hal_gm20b.o \

drivers/gpu/nvgpu/Makefile.sources

@@ -68,6 +68,7 @@ srcs :=	os/posix/nvgpu.c \
 	common/fb/fb_gp106.c \
 	common/fb/fb_gv100.c \
 	common/fb/fb_gv11b.c \
+	common/init/hal_init.c \
 	common/xve/xve_gp106.c \
 	common/therm/therm.c \
 	common/therm/therm_gm20b.c \
@@ -157,7 +158,6 @@ srcs :=	os/posix/nvgpu.c \
 	gk20a/fence_gk20a.c \
 	gk20a/gr_ctx_gk20a_sim.c \
 	gk20a/gr_ctx_gk20a.c \
-	gk20a/hal.c \
 	gk20a/tsg_gk20a.c \
 	gm20b/hal_gm20b.c \
 	gm20b/gr_gm20b.c \

drivers/gpu/nvgpu/common/init/hal_init.c

@@ -22,8 +22,12 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#include "gk20a.h"
-#include "hal.h"
+#include <nvgpu/gk20a.h>
+#include <nvgpu/log.h>
+#include <nvgpu/hal_init.h>
+#include <nvgpu/mc.h>
+#include <nvgpu/soc.h>
+
 #include "gm20b/hal_gm20b.h"
 #include "gp10b/hal_gp10b.h"
 #include "gp106/hal_gp106.h"
@@ -33,52 +37,86 @@
 #include "nvgpu_gpuid_next.h"
 #endif
 
-#include <nvgpu/log.h>
-
-int gpu_init_hal(struct gk20a *g)
+int nvgpu_init_hal(struct gk20a *g)
 {
+	int err = 0;
 	u32 ver = g->params.gpu_arch + g->params.gpu_impl;
+
 	switch (ver) {
 	case GK20A_GPUID_GM20B:
+		nvgpu_log_info(g, "gm20b detected");
+		if (gm20b_init_hal(g) != 0) {
+			return -ENODEV;
+		}
+		break;
 	case GK20A_GPUID_GM20B_B:
 		nvgpu_log_info(g, "gm20b detected");
-		if (gm20b_init_hal(g)) {
+		if (gm20b_init_hal(g) != 0) {
 			return -ENODEV;
 		}
 		break;
 	case NVGPU_GPUID_GP10B:
-		if (gp10b_init_hal(g)) {
+		if (gp10b_init_hal(g) != 0) {
 			return -ENODEV;
 		}
 		break;
 	case NVGPU_GPUID_GP104:
+		if (gp106_init_hal(g) != 0) {
+			return -ENODEV;
+		}
+		break;
 	case NVGPU_GPUID_GP106:
-		if (gp106_init_hal(g)) {
+		if (gp106_init_hal(g) != 0) {
 			return -ENODEV;
 		}
 		break;
 	case NVGPU_GPUID_GV11B:
-		if (gv11b_init_hal(g)) {
+		if (gv11b_init_hal(g) != 0) {
 			return -ENODEV;
 		}
 		break;
 	case NVGPU_GPUID_GV100:
-		if (gv100_init_hal(g)) {
+		if (gv100_init_hal(g) != 0) {
 			return -ENODEV;
 		}
 		break;
 #if defined(CONFIG_TEGRA_GPU_NEXT)
 	case NVGPU_GPUID_NEXT:
-		if (NVGPU_NEXT_INIT_HAL(g)) {
+		if (NVGPU_NEXT_INIT_HAL(g) != 0) {
 			return -ENODEV;
 		}
 		break;
 #endif
-
 	default:
 		nvgpu_err(g, "no support for %x", ver);
-		return -ENODEV;
+		err = -ENODEV;
+		break;
 	}
 
-	return 0;
+	return err;
+}
+
+
+int nvgpu_detect_chip(struct gk20a *g)
+{
+	struct nvgpu_gpu_params *p = &g->params;
+
+	if (p->gpu_arch != 0U) {
+		return 0;
+	}
+
+	nvgpu_mc_boot_0(g, &p->gpu_arch, &p->gpu_impl, &p->gpu_rev);
+
+	if ((p->gpu_arch + p->gpu_impl) == (u32)NVGPU_GPUID_GV11B) {
+		/* overwrite gpu revison for A02  */
+		if (!nvgpu_is_soc_t194_a01(g)) {
+			p->gpu_rev = 0xa2;
+		}
+	}
+	nvgpu_log_info(g, "arch: %x, impl: %x, rev: %x\n",
+			g->params.gpu_arch,
+			g->params.gpu_impl,
+			g->params.gpu_rev);
+
+	return nvgpu_init_hal(g);
 }

drivers/gpu/nvgpu/gk20a/gk20a.c

@@ -45,7 +45,6 @@
 #include "gk20a.h"
 
 #include "dbg_gpu_gk20a.h"
-#include "hal.h"
 #include "pstate/pstate.h"
 
 void __nvgpu_check_gpu_state(struct gk20a *g)
@@ -65,33 +64,6 @@ void __gk20a_warn_on_no_regs(void)
 	WARN_ONCE(1, "Attempted access to GPU regs after unmapping!");
 }
 
-int gk20a_detect_chip(struct gk20a *g)
-{
-	struct nvgpu_gpu_params *p = &g->params;
-
-	if (p->gpu_arch) {
-		return 0;
-	}
-
-	nvgpu_mc_boot_0(g, &p->gpu_arch, &p->gpu_impl, &p->gpu_rev);
-
-	if ((p->gpu_arch + p->gpu_impl) == NVGPU_GPUID_GV11B) {
-
-		/* overwrite gpu revison for A02  */
-		if (!nvgpu_is_soc_t194_a01(g)) {
-			p->gpu_rev = 0xa2;
-		}
-
-	}
-
-	nvgpu_log_info(g, "arch: %x, impl: %x, rev: %x\n",
-			g->params.gpu_arch,
-			g->params.gpu_impl,
-			g->params.gpu_rev);
-
-	return gpu_init_hal(g);
-}
-
 static void gk20a_mask_interrupts(struct gk20a *g)
 {
 	if (g->ops.mc.intr_mask != NULL) {

drivers/gpu/nvgpu/include/nvgpu/gk20a.h

@@ -1761,5 +1761,4 @@ static inline bool gk20a_platform_has_syncpoints(struct gk20a *g)
 #endif
 }
 
-int gk20a_detect_chip(struct gk20a *g);
 #endif /* GK20A_H */

drivers/gpu/nvgpu/include/nvgpu/hal_init.h

@@ -22,11 +22,12 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#ifndef NVGPU_GK20A_HAL_H
-#define NVGPU_GK20A_HAL_H
+#ifndef NVGPU_HAL_INIT_H
+#define NVGPU_HAL_INIT_H
 
 struct gk20a;
 
-int gpu_init_hal(struct gk20a *g);
+int nvgpu_init_hal(struct gk20a *g);
+int nvgpu_detect_chip(struct gk20a *g);
 
-#endif /* NVGPU_GK20A_HAL_H */
+#endif /* NVGPU_HAL_INIT_H */

drivers/gpu/nvgpu/os/linux/module.c

@@ -33,6 +33,7 @@
 
 #include <soc/tegra/fuse.h>
 
+#include <nvgpu/hal_init.h>
 #include <nvgpu/dma.h>
 #include <nvgpu/kmem.h>
 #include <nvgpu/nvgpu_common.h>
@@ -266,7 +267,7 @@ int gk20a_pm_finalize_poweron(struct device *dev)
 		INIT_WORK(&l->nonstall_fn_work, nvgpu_intr_nonstall_cb);
 	}
 
-	err = gk20a_detect_chip(g);
+	err = nvgpu_detect_chip(g);
 	if (err)
 		goto done;