gpu: nvgpu: gm20b: Fix build warnings

Fix build warnings by removing the unused variables, functions and
duplicated code.

Enable -Werror to prevent new build warnings.

Change-Id: Ifd73344a6e12497e6dca595ac7a6edd7ca698f88
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/497374
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
GVS: Gerrit_Virtual_Submit

drivers/gpu/nvgpu/gm20b/Makefile

@@ -1,6 +1,7 @@
 GCOV_PROFILE := y
 ccflags-y += -Idrivers/gpu/nvgpu
 ccflags-y += -Wno-multichar
+ccflags-y += -Werror
 
 obj-$(CONFIG_GK20A)  = \
 	hal_gm20b.o \

drivers/gpu/nvgpu/gm20b/acr_gm20b.c

@@ -838,8 +838,8 @@ int gm20b_bootstrap_hs_flcn(struct gk20a *g)
 	int i, err = 0;
 	struct sg_table *sgt_pmu_ucode = NULL;
 	dma_addr_t iova;
-	u64 *pacr_ucode_cpuva = NULL, pacr_ucode_pmu_va, *acr_dmem;
+	u64 *pacr_ucode_cpuva = NULL, pacr_ucode_pmu_va = 0, *acr_dmem;
-	u32 img_size_in_bytes;
+	u32 img_size_in_bytes = 0;
 	u32 status, size;
 	u64 start;
 	struct acr_gm20b *acr = &g->acr;
@@ -980,9 +980,7 @@ err_release_acr_fw:
 
 u8 pmu_is_debug_mode_en(struct gk20a *g)
 {
-	int ctl_stat =  gk20a_readl(g, pwr_pmu_scpctl_stat_r());
 	return 1;
-	/*TODO return (ctl_stat & pwr_pmu_scpctl_stat_debug_mode_m());*/
 }
 
 /*

drivers/gpu/nvgpu/gm20b/gr_gm20b.c

@@ -497,7 +497,7 @@ static int gr_gm20b_ctx_state_floorsweep(struct gk20a *g)
 	u32 sm_id = 0, gpc_id = 0;
 	u32 sm_id_to_gpc_id[proj_scal_max_gpcs_v() * proj_scal_max_tpc_per_gpc_v()];
 	u32 tpc_per_gpc;
-	u32 tpc_fs_mask = 0, tpc_sm_id, gpc_tpc_id;
+	u32 tpc_fs_mask = 0, tpc_sm_id = 0, gpc_tpc_id = 0;
 
 	gk20a_dbg_fn("");
 
@@ -689,10 +689,6 @@ static void gr_gm20b_load_gpccs_with_bootloader(struct gk20a *g)
 
 static int gr_gm20b_load_ctxsw_ucode(struct gk20a *g)
 {
-	struct gk20a_ctxsw_ucode_info *ucode_info = &g->ctxsw_ucode_info;
-	u64 addr_base = ucode_info->ucode_gpuva;
-	int i;
-
 	gk20a_dbg_fn("");
 
 	if (tegra_platform_is_linsim()) {
@@ -702,11 +698,7 @@ static int gr_gm20b_load_ctxsw_ucode(struct gk20a *g)
 			gr_gpccs_ctxsw_mailbox_value_f(0xc0de7777));
 	}
 
-	gr_gk20a_load_falcon_bind_instblk(g);
+	gr_gm20b_load_gpccs_with_bootloader(g);
-	g->ops.gr.falcon_load_ucode(g, addr_base,
-		&g->ctxsw_ucode_info.gpccs,
-		gr_gpcs_gpccs_falcon_hwcfg_r() -
-		gr_fecs_falcon_hwcfg_r());
 
 	gk20a_writel(g, gr_fecs_ctxsw_mailbox_clear_r(0), 0x0);
 	gk20a_writel(g, gr_fecs_ctxsw_mailbox_r(1), 0x1);

drivers/gpu/nvgpu/gm20b/ltc_gm20b.c

@@ -364,4 +364,7 @@ void gm20b_init_ltc(struct gpu_ops *gops)
 	gops->ltc.isr = gm20b_ltc_isr;
 	gops->ltc.cbc_fix_config = gm20b_ltc_cbc_fix_config;
 	gops->ltc.flush = gm20b_flush_ltc;
+#ifdef CONFIG_DEBUG_FS
+	gops->ltc.sync_debugfs = gk20a_ltc_sync_debugfs;
+#endif
 }

drivers/gpu/nvgpu/gm20b/mm_gm20b.c

@@ -90,52 +90,6 @@ fail:
 
 }
 
-static void allocate_gmmu_pde_sparse(struct vm_gk20a *vm, u32 i)
-{
-	bool small_valid, big_valid;
-	u64 pte_addr[2] = {0, 0};
-	struct page_table_gk20a *small_pte =
-		vm->pdes.ptes[gmmu_page_size_small] + i;
-	struct page_table_gk20a *big_pte =
-		vm->pdes.ptes[gmmu_page_size_big] + i;
-	u32 pde_v[2] = {0, 0};
-	u32 *pde;
-
-	gk20a_dbg_fn("");
-
-	small_valid = small_pte && small_pte->ref;
-	big_valid   = big_pte && big_pte->ref;
-
-	if (small_valid)
-		pte_addr[gmmu_page_size_small] =
-			gk20a_mm_iova_addr(small_pte->sgt->sgl);
-	if (big_valid)
-		pte_addr[gmmu_page_size_big] =
-			gk20a_mm_iova_addr(big_pte->sgt->sgl);
-
-	pde_v[0] = gmmu_pde_size_full_f();
-	pde_v[0] |= gmmu_pde_aperture_big_invalid_f();
-	pde_v[1] |= gmmu_pde_aperture_small_invalid_f() |
-			gmmu_pde_vol_big_true_f();
-
-	pde = pde_from_index(vm, i);
-
-	gk20a_mem_wr32(pde, 0, pde_v[0]);
-	gk20a_mem_wr32(pde, 1, pde_v[1]);
-
-	smp_mb();
-
-	FLUSH_CPU_DCACHE(pde,
-			 sg_phys(vm->pdes.sgt->sgl) + (i*gmmu_pde__size_v()),
-			 sizeof(u32)*2);
-
-	gk20a_mm_l2_invalidate(vm->mm->g);
-
-	gk20a_dbg(gpu_dbg_pte, "pde:%d = 0x%x,0x%08x\n", i, pde_v[1], pde_v[0]);
-
-	vm->tlb_dirty  = true;
-}
-
 static bool gm20b_vm_is_pde_in_range(struct vm_gk20a *vm, u64 vaddr_lo,
 					u64 vaddr_hi, u32 pde)
 {
@@ -289,10 +243,6 @@ void gm20b_vm_clear_sparse(struct vm_gk20a *vm, u64 vaddr,
 			vm->mm->pde_stride_shift);
 
 	for (pde_i = pde_lo; pde_i <= pde_hi; pde_i++) {
-		u32 pte_lo, pte_hi;
-		u32 pte_cur;
-		void *pte_kv_cur;
-
 		struct page_table_gk20a *pte = vm->pdes.ptes[pgsz_idx] + pde_i;
 		pte->ref_cnt--;