/*
* GM20B 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 <linux/types.h>
#include "hw_ltc_gm20b.h"
#include "hw_top_gm20b.h"
#include "hw_proj_gm20b.h"
#include "hw_pri_ringmaster_gm20b.h"
#include "gk20a/ltc_common.c"
#include "gk20a/gk20a.h"
#include "gk20a/gk20a_allocator.h"
static int gm20b_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 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 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_ltc * 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_ltc * 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 gm20b_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_ltc = ltc_ltcs_ltss_cbc_param_slices_per_ltc_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_ltc; 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;
}
static void gm20b_ltc_init_fs_state(struct gk20a *g)
{
gk20a_dbg_info("initialize gm20b l2");
g->max_ltc_count = gk20a_readl(g, top_num_ltcs_r());
g->ltc_count = gk20a_readl(g, pri_ringmaster_enum_ltc_r());
gk20a_dbg_info("%d ltcs out of %d", g->ltc_count, g->max_ltc_count);
gk20a_writel(g, ltc_ltcs_ltss_cbc_num_active_ltcs_r(),
g->ltc_count);
gk20a_writel(g, ltc_ltcs_misc_ltc_num_active_ltcs_r(),
g->ltc_count);
gk20a_writel(g, ltc_ltcs_ltss_dstg_cfg0_r(),
gk20a_readl(g, ltc_ltc0_lts0_dstg_cfg0_r()) |
ltc_ltcs_ltss_dstg_cfg0_vdc_4to2_disable_m());
}
void gm20b_init_ltc(struct gpu_ops *gops)
{
/* Gk20a reused ops. */
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.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;
/* GM20b specific ops. */
gops->ltc.init_fs_state = gm20b_ltc_init_fs_state;
gops->ltc.init_comptags = gm20b_ltc_init_comptags;
gops->ltc.clear_comptags = gm20b_ltc_clear_comptags;
gops->ltc.elpg_flush = gk20a_mm_g_elpg_flush_locked;
}
