1 files changed, 225 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c b/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
new file mode 100644
index 00000000..31c79aff
--- /dev/null
+++ b/drivers/gpu/nvgpu/gp10b/ltc_gp10b.c
@@ -0,0 +1,225 @@
+/*
+ * GP10B L2
+ *
+ * Copyright (c) 2014-2016, 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 <linux/types.h>
+
+#include <dt-bindings/memory/tegra-swgroup.h>
+
+#include "gk20a/gk20a.h"
+#include "gm20b/ltc_gm20b.h"
+#include "hw_mc_gp10b.h"
+#include "hw_ltc_gp10b.h"
+
+#include "gk20a/ltc_common.c"
+
+static int gp10b_determine_L2_size_bytes(struct gk20a *g)
+{
+        u32 tmp;
+        int ret;
+
+        gk20a_dbg_fn("");
+
+        tmp = gk20a_readl(g, ltc_ltc0_lts0_tstg_info_1_r());
+
+        ret = g->ltc_count *
+                ltc_ltc0_lts0_tstg_info_1_slice_size_in_kb_v(tmp)*1024 *
+                ltc_ltc0_lts0_tstg_info_1_slices_per_l2_v(tmp);
+
+        gk20a_dbg(gpu_dbg_info, "L2 size: %d\n", ret);
+
+        gk20a_dbg_fn("done");
+
+        return ret;
+}
+
+static int gp10b_ltc_init_comptags(struct gk20a *g, struct gr_gk20a *gr)
+{
+        /* max memory size (MB) to cover */
+        u32 max_size = gr->max_comptag_mem;
+        /* one tag line covers 64KB */
+        u32 max_comptag_lines = max_size << 4;
+
+        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 cacheline_size =
+                512 << ltc_ltcs_ltss_cbc_param_cache_line_size_v(cbc_param);
+        u32 slices_per_ltc =
+                ltc_ltcs_ltss_cbc_param_slices_per_ltc_v(cbc_param);
+        u32 cbc_param2 =
+                gk20a_readl(g, ltc_ltcs_ltss_cbc_param2_r());
+        u32 gobs_per_comptagline_per_slice =
+                ltc_ltcs_ltss_cbc_param2_gobs_per_comptagline_per_slice_v(cbc_param2);
+
+        u32 compbit_backing_size;
+
+        int err;
+        struct gk20a_platform *platform = dev_get_drvdata(g->dev);
+
+        gk20a_dbg_fn("");
+
+        if (max_comptag_lines == 0)
+                return 0;
+
+        if (max_comptag_lines > hw_max_comptag_lines)
+                max_comptag_lines = hw_max_comptag_lines;
+
+        compbit_backing_size =
+                roundup(max_comptag_lines * gobs_per_comptagline_per_slice,
+                        cacheline_size);
+        compbit_backing_size =
+                roundup(compbit_backing_size * slices_per_ltc * g->ltc_count,
+                        g->ops.fb.compressible_page_size(g));
+
+        /* aligned to 2KB * ltc_count */
+        compbit_backing_size +=
+                g->ltc_count << ltc_ltcs_ltss_cbc_base_alignment_shift_v();
+
+        /* must be a multiple of 64KB */
+        compbit_backing_size = roundup(compbit_backing_size, 64*1024);
+
+        gk20a_dbg_info("compbit backing store size : %d",
+                compbit_backing_size);
+        gk20a_dbg_info("max comptag lines : %d",
+                max_comptag_lines);
+        gk20a_dbg_info("gobs_per_comptagline_per_slice: %d",
+                gobs_per_comptagline_per_slice);
+
+        if (platform->is_fmodel)
+                err = gk20a_ltc_alloc_phys_cbc(g, compbit_backing_size);
+        else
+                err = gk20a_ltc_alloc_virt_cbc(g, compbit_backing_size);
+
+        if (err)
+                return err;
+
+        err = gk20a_comptag_allocator_init(&gr->comp_tags, max_comptag_lines);
+        if (err)
+                return err;
+
+        gr->comptags_per_cacheline = comptags_per_cacheline;
+        gr->slices_per_ltc = slices_per_ltc;
+        gr->cacheline_size = cacheline_size;
+        gr->gobs_per_comptagline_per_slice = gobs_per_comptagline_per_slice;
+
+        return 0;
+}
+
+static void gp10b_ltc_isr(struct gk20a *g)
+{
+        u32 mc_intr, ltc_intr;
+        unsigned int ltc, slice;
+        u32 ltc_stride = nvgpu_get_litter_value(g, GPU_LIT_LTC_STRIDE);
+        u32 lts_stride = nvgpu_get_litter_value(g, GPU_LIT_LTS_STRIDE);
+
+        mc_intr = gk20a_readl(g, mc_intr_ltc_r());
+        gk20a_err(dev_from_gk20a(g), "mc_ltc_intr: %08x",
+                  mc_intr);
+        for (ltc = 0; ltc < g->ltc_count; ltc++) {
+                if ((mc_intr & 1 << ltc) == 0)
+                        continue;
+                for (slice = 0; slice < g->gr.slices_per_ltc; slice++) {
+                        u32 offset = ltc_stride * ltc + lts_stride * slice;
+                        ltc_intr = gk20a_readl(g, ltc_ltc0_lts0_intr_r() + offset);
+
+                        /* Detect and handle ECC errors */
+                        if (ltc_intr &
+                                ltc_ltcs_ltss_intr_ecc_sec_error_pending_f()) {
+                                u32 ecc_stats_reg_val;
+
+                                gk20a_err(dev_from_gk20a(g),
+                                        "Single bit error detected in GPU L2!");
+
+                                ecc_stats_reg_val =
+                                        gk20a_readl(g,
+                                                ltc_ltc0_lts0_dstg_ecc_report_r() + offset);
+                                g->gr.t18x.ecc_stats.l2_sec_count.counters[ltc] +=
+                                        ltc_ltc0_lts0_dstg_ecc_report_sec_count_v(ecc_stats_reg_val);
+                                ecc_stats_reg_val &=
+                                        ~(ltc_ltc0_lts0_dstg_ecc_report_sec_count_m());
+                                gk20a_writel(g,
+                                        ltc_ltc0_lts0_dstg_ecc_report_r() + offset,
+                                        ecc_stats_reg_val);
+
+                                g->ops.mm.l2_flush(g, true);
+                        }
+                        if (ltc_intr &
+                                ltc_ltcs_ltss_intr_ecc_ded_error_pending_f()) {
+                                u32 ecc_stats_reg_val;
+
+                                gk20a_err(dev_from_gk20a(g),
+                                        "Double bit error detected in GPU L2!");
+
+                                ecc_stats_reg_val =
+                                        gk20a_readl(g,
+                                                ltc_ltc0_lts0_dstg_ecc_report_r() + offset);
+                                g->gr.t18x.ecc_stats.l2_ded_count.counters[ltc] +=
+                                        ltc_ltc0_lts0_dstg_ecc_report_ded_count_v(ecc_stats_reg_val);
+                                ecc_stats_reg_val &=
+                                        ~(ltc_ltc0_lts0_dstg_ecc_report_ded_count_m());
+                                gk20a_writel(g,
+                                        ltc_ltc0_lts0_dstg_ecc_report_r() + offset,
+                                        ecc_stats_reg_val);
+                        }
+
+                        gk20a_err(dev_from_gk20a(g), "ltc%d, slice %d: %08x",
+                                  ltc, slice, ltc_intr);
+                        gk20a_writel(g, ltc_ltc0_lts0_intr_r() +
+                                           ltc_stride * ltc + lts_stride * slice,
+                                     ltc_intr);
+                }
+        }
+}
+
+static void gp10b_ltc_init_fs_state(struct gk20a *g)
+{
+        u32 ltc_intr;
+
+        gm20b_ltc_init_fs_state(g);
+
+        gk20a_writel(g, ltc_ltca_g_axi_pctrl_r(),
+                        ltc_ltca_g_axi_pctrl_user_sid_f(TEGRA_SID_GPUB));
+
+        /* Enable ECC interrupts */
+        ltc_intr = gk20a_readl(g, ltc_ltcs_ltss_intr_r());
+        ltc_intr |= ltc_ltcs_ltss_intr_en_ecc_sec_error_enabled_f() |
+                        ltc_ltcs_ltss_intr_en_ecc_ded_error_enabled_f();
+        gk20a_writel(g, ltc_ltcs_ltss_intr_r(),
+                        ltc_intr);
+}
+
+void gp10b_init_ltc(struct gpu_ops *gops)
+{
+        gops->ltc.determine_L2_size_bytes = gp10b_determine_L2_size_bytes;
+        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.init_cbc = gk20a_ltc_init_cbc;
+
+        /* GM20b specific ops. */
+        gops->ltc.init_fs_state = gp10b_ltc_init_fs_state;
+        gops->ltc.init_comptags = gp10b_ltc_init_comptags;
+        gops->ltc.cbc_ctrl = gm20b_ltc_cbc_ctrl;
+        gops->ltc.elpg_flush = gm20b_ltc_g_elpg_flush_locked;
+        gops->ltc.isr = gp10b_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
+}