From 1fd722f592c2e0523c5e399a2406a4e387057188 Mon Sep 17 00:00:00 2001 From: Aingara Paramakuru Date: Mon, 5 May 2014 21:14:22 -0400 Subject: gpu: nvgpu: support gk20a virtualization The nvgpu driver now supports using the Tegra graphics virtualization interfaces to support gk20a in a virtualized environment. Bug 1509608 Change-Id: I6ede15ee7bf0b0ad8a13e8eb5f557c3516ead676 Signed-off-by: Aingara Paramakuru Reviewed-on: http://git-master/r/440122 Reviewed-by: Terje Bergstrom Tested-by: Terje Bergstrom --- drivers/gpu/nvgpu/vgpu/ltc_vgpu.c | 55 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 drivers/gpu/nvgpu/vgpu/ltc_vgpu.c (limited to 'drivers/gpu/nvgpu/vgpu/ltc_vgpu.c') diff --git a/drivers/gpu/nvgpu/vgpu/ltc_vgpu.c b/drivers/gpu/nvgpu/vgpu/ltc_vgpu.c new file mode 100644 index 00000000..ddff23b7 --- /dev/null +++ b/drivers/gpu/nvgpu/vgpu/ltc_vgpu.c @@ -0,0 +1,55 @@ +/* + * Virtualized GPU L2 + * + * Copyright (c) 2014 NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include "vgpu/vgpu.h" + +static int vgpu_determine_L2_size_bytes(struct gk20a *g) +{ + struct gk20a_platform *platform = gk20a_get_platform(g->dev); + u32 cache_size = 0; + + gk20a_dbg_fn(""); + + if (vgpu_get_attribute(platform->virt_handle, + TEGRA_VGPU_ATTRIB_L2_SIZE, &cache_size)) + dev_err(dev_from_gk20a(g), "unable to get L2 size"); + + return cache_size; +} + +static int vgpu_ltc_init_comptags(struct gk20a *g, struct gr_gk20a *gr) +{ + struct gk20a_platform *platform = gk20a_get_platform(g->dev); + u32 max_comptag_lines = 0; + + gk20a_dbg_fn(""); + + vgpu_get_attribute(platform->virt_handle, + TEGRA_VGPU_ATTRIB_COMPTAG_LINES, &max_comptag_lines); + if (max_comptag_lines < 2) + return -ENXIO; + + gk20a_allocator_init(&gr->comp_tags, "comptag", + 1, /* start */ + max_comptag_lines - 1, /* length*/ + 1); /* align */ + return 0; +} + +void vgpu_init_ltc_ops(struct gpu_ops *gops) +{ + gops->ltc.determine_L2_size_bytes = vgpu_determine_L2_size_bytes; + gops->ltc.init_comptags = vgpu_ltc_init_comptags; +} -- cgit v1.2.2