From 2eb6dcb4694c8b83e22c50d9fd4d3fdd85b93c46 Mon Sep 17 00:00:00 2001 From: Terje Bergstrom Date: Thu, 16 Oct 2014 15:15:11 +0300 Subject: gpu: nvgpu: Implement 64k large page support Implement support for 64kB large page size. Add an API to create an address space via IOCTL so that we can accept flags, and assign one flag for enabling 64kB large page size. Also adds APIs to set per-context large page size. This is possible only on Maxwell, so return error if caller tries to set large page size on Kepler. Default large page size is still 128kB. Change-Id: I20b51c8f6d4a984acae8411ace3de9000c78e82f Signed-off-by: Terje Bergstrom --- drivers/gpu/nvgpu/gm20b/mm_gm20b.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/gpu/nvgpu/gm20b/mm_gm20b.c') diff --git a/drivers/gpu/nvgpu/gm20b/mm_gm20b.c b/drivers/gpu/nvgpu/gm20b/mm_gm20b.c index b4622c0b..13e7859f 100644 --- a/drivers/gpu/nvgpu/gm20b/mm_gm20b.c +++ b/drivers/gpu/nvgpu/gm20b/mm_gm20b.c @@ -19,6 +19,7 @@ #include "hw_gmmu_gm20b.h" #include "hw_fb_gm20b.h" #include "hw_gr_gm20b.h" +#include "hw_ram_gm20b.h" static int allocate_gmmu_ptes_sparse(struct vm_gk20a *vm, enum gmmu_pgsz_gk20a pgsz_idx, @@ -259,6 +260,25 @@ bool gm20b_mm_mmu_debug_mode_enabled(struct gk20a *g) gr_gpcs_pri_mmu_debug_ctrl_debug_enabled_v(); } +void gm20b_mm_set_big_page_size(struct gk20a *g, void *inst_ptr, int size) +{ + u32 val; + + gk20a_dbg_fn(""); + + gk20a_dbg_info("big page size %d\n", size); + val = gk20a_mem_rd32(inst_ptr, ram_in_big_page_size_w()); + val &= ~ram_in_big_page_size_m(); + + if (size == SZ_64K) + val |= ram_in_big_page_size_64kb_f(); + else + val |= ram_in_big_page_size_128kb_f(); + + gk20a_mem_wr32(inst_ptr, ram_in_big_page_size_w(), val); + gk20a_dbg_fn("done"); +} + void gm20b_init_mm(struct gpu_ops *gops) { gops->mm.set_sparse = gm20b_vm_put_sparse; @@ -273,4 +293,5 @@ void gm20b_init_mm(struct gpu_ops *gops) gops->mm.l2_invalidate = gk20a_mm_l2_invalidate; gops->mm.l2_flush = gk20a_mm_l2_flush; gops->mm.tlb_invalidate = gk20a_mm_tlb_invalidate; + gops->mm.set_big_page_size = gm20b_mm_set_big_page_size; } -- cgit v1.2.2