gpu: nvgpu: Add NVIDIA GPU Driver

This patch moves the NVIDIA GPU driver to a new location.

Bug 1482562

Change-Id: I24293810b9d0f1504fd9be00135e21dad656ccb6
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/383722
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 203 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c b/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
new file mode 100644
index 00000000..08aedecd
--- /dev/null
+++ b/drivers/gpu/nvgpu/gk20a/ltc_gk20a.c
@@ -0,0 +1,203 @@
+/*
+ * drivers/video/tegra/host/gk20a/ltc_gk20a.c
+ *
+ * GK20A Graphics
+ *
+ * Copyright (c) 2011-2014, 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+
+#include "hw_ltc_gk20a.h"
+#include "hw_proj_gk20a.h"
+
+#include "ltc_common.c"
+
+static int gk20a_ltc_init_comptags(struct gk20a *g, struct gr_gk20a *gr)
+{
+        struct device *d = dev_from_gk20a(g);
+        DEFINE_DMA_ATTRS(attrs);
+        dma_addr_t iova;
+
+        /* max memory size (MB) to cover */
+        u32 max_size = gr->max_comptag_mem;
+        /* one tag line covers 128KB */
+        u32 max_comptag_lines = max_size << 3;
+
+        u32 hw_max_comptag_lines =
+                ltc_ltcs_ltss_cbc_ctrl3_clear_upper_bound_init_v();
+
+        u32 cbc_param =
+                gk20a_readl(g, ltc_ltcs_ltss_cbc_param_r());
+        u32 comptags_per_cacheline =
+                ltc_ltcs_ltss_cbc_param_comptags_per_cache_line_v(cbc_param);
+        u32 slices_per_fbp =
+                ltc_ltcs_ltss_cbc_param_slices_per_fbp_v(cbc_param);
+        u32 cacheline_size =
+                512 << ltc_ltcs_ltss_cbc_param_cache_line_size_v(cbc_param);
+
+        u32 compbit_backing_size;
+
+        gk20a_dbg_fn("");
+
+        if (max_comptag_lines == 0) {
+                gr->compbit_store.size = 0;
+                return 0;
+        }
+
+        if (max_comptag_lines > hw_max_comptag_lines)
+                max_comptag_lines = hw_max_comptag_lines;
+
+        /* no hybird fb */
+        compbit_backing_size =
+                DIV_ROUND_UP(max_comptag_lines, comptags_per_cacheline) *
+                cacheline_size * slices_per_fbp * gr->num_fbps;
+
+        /* aligned to 2KB * num_fbps */
+        compbit_backing_size +=
+                gr->num_fbps << ltc_ltcs_ltss_cbc_base_alignment_shift_v();
+
+        /* must be a multiple of 64KB */
+        compbit_backing_size = roundup(compbit_backing_size, 64*1024);
+
+        max_comptag_lines =
+                (compbit_backing_size * comptags_per_cacheline) /
+                cacheline_size * slices_per_fbp * gr->num_fbps;
+
+        if (max_comptag_lines > hw_max_comptag_lines)
+                max_comptag_lines = hw_max_comptag_lines;
+
+        gk20a_dbg_info("compbit backing store size : %d",
+                compbit_backing_size);
+        gk20a_dbg_info("max comptag lines : %d",
+                max_comptag_lines);
+
+        dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs);
+        gr->compbit_store.size = compbit_backing_size;
+        gr->compbit_store.pages = dma_alloc_attrs(d, gr->compbit_store.size,
+                                        &iova, GFP_KERNEL, &attrs);
+        if (!gr->compbit_store.pages) {
+                gk20a_err(dev_from_gk20a(g), "failed to allocate"
+                           "backing store for compbit : size %d",
+                           compbit_backing_size);
+                return -ENOMEM;
+        }
+        gr->compbit_store.base_iova = iova;
+
+        gk20a_allocator_init(&gr->comp_tags, "comptag",
+                              1, /* start */
+                              max_comptag_lines - 1, /* length*/
+                              1); /* align */
+
+        return 0;
+}
+
+static int gk20a_ltc_clear_comptags(struct gk20a *g, u32 min, u32 max)
+{
+        struct gr_gk20a *gr = &g->gr;
+        u32 fbp, slice, ctrl1, val;
+        unsigned long end_jiffies = jiffies +
+                msecs_to_jiffies(gk20a_get_gr_idle_timeout(g));
+        u32 delay = GR_IDLE_CHECK_DEFAULT;
+        u32 slices_per_fbp =
+                ltc_ltcs_ltss_cbc_param_slices_per_fbp_v(
+                        gk20a_readl(g, ltc_ltcs_ltss_cbc_param_r()));
+
+        gk20a_dbg_fn("");
+
+        if (gr->compbit_store.size == 0)
+                return 0;
+
+        gk20a_writel(g, ltc_ltcs_ltss_cbc_ctrl2_r(),
+                     ltc_ltcs_ltss_cbc_ctrl2_clear_lower_bound_f(min));
+        gk20a_writel(g, ltc_ltcs_ltss_cbc_ctrl3_r(),
+                     ltc_ltcs_ltss_cbc_ctrl3_clear_upper_bound_f(max));
+        gk20a_writel(g, ltc_ltcs_ltss_cbc_ctrl1_r(),
+                     gk20a_readl(g, ltc_ltcs_ltss_cbc_ctrl1_r()) |
+                     ltc_ltcs_ltss_cbc_ctrl1_clear_active_f());
+
+        for (fbp = 0; fbp < gr->num_fbps; fbp++) {
+                for (slice = 0; slice < slices_per_fbp; slice++) {
+
+                        delay = GR_IDLE_CHECK_DEFAULT;
+
+                        ctrl1 = ltc_ltc0_lts0_cbc_ctrl1_r() +
+                                fbp * proj_ltc_stride_v() +
+                                slice * proj_lts_stride_v();
+
+                        do {
+                                val = gk20a_readl(g, ctrl1);
+                                if (ltc_ltcs_ltss_cbc_ctrl1_clear_v(val) !=
+                                    ltc_ltcs_ltss_cbc_ctrl1_clear_active_v())
+                                        break;
+
+                                usleep_range(delay, delay * 2);
+                                delay = min_t(u32, delay << 1,
+                                        GR_IDLE_CHECK_MAX);
+
+                        } while (time_before(jiffies, end_jiffies) ||
+                                        !tegra_platform_is_silicon());
+
+                        if (!time_before(jiffies, end_jiffies)) {
+                                gk20a_err(dev_from_gk20a(g),
+                                           "comp tag clear timeout\n");
+                                return -EBUSY;
+                        }
+                }
+        }
+
+        return 0;
+}
+
+
+#ifdef CONFIG_DEBUG_FS
+static void gk20a_ltc_sync_debugfs(struct gk20a *g)
+{
+        u32 reg_f = ltc_ltcs_ltss_tstg_set_mgmt_2_l2_bypass_mode_enabled_f();
+
+        spin_lock(&g->debugfs_lock);
+        if (g->mm.ltc_enabled != g->mm.ltc_enabled_debug) {
+                u32 reg = gk20a_readl(g, ltc_ltcs_ltss_tstg_set_mgmt_2_r());
+                if (g->mm.ltc_enabled_debug)
+                        /* bypass disabled (normal caching ops)*/
+                        reg &= ~reg_f;
+                else
+                        /* bypass enabled (no caching) */
+                        reg |= reg_f;
+
+                gk20a_writel(g, ltc_ltcs_ltss_tstg_set_mgmt_2_r(), reg);
+                g->mm.ltc_enabled = g->mm.ltc_enabled_debug;
+        }
+        spin_unlock(&g->debugfs_lock);
+}
+#endif
+
+void gk20a_init_ltc(struct gpu_ops *gops)
+{
+        gops->ltc.determine_L2_size_bytes = gk20a_determine_L2_size_bytes;
+        gops->ltc.set_max_ways_evict_last = gk20a_ltc_set_max_ways_evict_last;
+        gops->ltc.init_comptags = gk20a_ltc_init_comptags;
+        gops->ltc.clear_comptags = gk20a_ltc_clear_comptags;
+        gops->ltc.set_zbc_color_entry = gk20a_ltc_set_zbc_color_entry;
+        gops->ltc.set_zbc_depth_entry = gk20a_ltc_set_zbc_depth_entry;
+        gops->ltc.clear_zbc_color_entry = gk20a_ltc_clear_zbc_color_entry;
+        gops->ltc.clear_zbc_depth_entry = gk20a_ltc_clear_zbc_depth_entry;
+        gops->ltc.init_zbc = gk20a_ltc_init_zbc;
+        gops->ltc.init_cbc = gk20a_ltc_init_cbc;
+#ifdef CONFIG_DEBUG_FS
+        gops->ltc.sync_debugfs = gk20a_ltc_sync_debugfs;
+#endif
+        gops->ltc.elpg_flush = gk20a_mm_g_elpg_flush_locked;
+}