/*
* GK20A L2
*
* Copyright (c) 2011-2016, 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.
*
* 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 <trace/events/gk20a.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)
{
/* 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;
int err;
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;
/* 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);
if (tegra_platform_is_linsim())
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_fbp / g->ltc_count;
gr->cacheline_size = cacheline_size;
return 0;
}
static int gk20a_ltc_cbc_ctrl(struct gk20a *g, enum gk20a_cbc_op op,
u32 min, u32 max)
{
int err = 0;
struct gr_gk20a *gr = &g->gr;
u32 fbp, slice, ctrl1, val, hw_op = 0;
int retry = 200;
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("");
trace_gk20a_ltc_cbc_ctrl_start(g->dev->name, op, min, max);
if (gr->compbit_store.mem.size == 0)
return 0;
mutex_lock(&g->mm.l2_op_lock);
if (op == gk20a_cbc_op_clear) {
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));
hw_op = ltc_ltcs_ltss_cbc_ctrl1_clear_active_f();
} else if (op == gk20a_cbc_op_clean) {
hw_op = ltc_ltcs_ltss_cbc_ctrl1_clean_active_f();
} else if (op == gk20a_cbc_op_invalidate) {
hw_op = ltc_ltcs_ltss_cbc_ctrl1_invalidate_active_f();
} else {
BUG_ON(1);
}
gk20a_writel(g, ltc_ltcs_ltss_cbc_ctrl1_r(),
gk20a_readl(g, ltc_ltcs_ltss_cbc_ctrl1_r()) | hw_op);
for (fbp = 0; fbp < gr->num_fbps; fbp++) {
for (slice = 0; slice < slices_per_fbp; slice++) {
ctrl1 = ltc_ltc0_lts0_cbc_ctrl1_r() +
fbp * proj_ltc_stride_v() +
slice * proj_lts_stride_v();
retry = 200;
do {
val = gk20a_readl(g, ctrl1);
if (!(val & hw_op))
break;
retry--;
udelay(5);
} while (retry >= 0 ||
!tegra_platform_is_silicon());
if (retry < 0 && tegra_platform_is_silicon()) {
gk20a_err(dev_from_gk20a(g),
"comp tag clear timeout\n");
err = -EBUSY;
goto out;
}
}
}
out:
trace_gk20a_ltc_cbc_ctrl_done(g->dev->name);
mutex_unlock(&g->mm.l2_op_lock);
return err;
}
static void gk20a_ltc_init_fs_state(struct gk20a *g)
{
u32 reg;
gk20a_dbg_info("initialize gk20a L2");
g->max_ltc_count = g->ltc_count = 1;
/* Disable LTC interrupts */
reg = gk20a_readl(g, ltc_ltcs_ltss_intr_r());
reg &= ~ltc_ltcs_ltss_intr_en_evicted_cb_m();
reg &= ~ltc_ltcs_ltss_intr_en_illegal_compstat_m();
gk20a_writel(g, ltc_ltcs_ltss_intr_r(), reg);
}
static void gk20a_ltc_isr(struct gk20a *g)
{
u32 intr;
intr = gk20a_readl(g, ltc_ltc0_ltss_intr_r());
gk20a_err(dev_from_gk20a(g), "ltc: %08x\n", intr);
gk20a_writel(g, ltc_ltc0_ltss_intr_r(), intr);
}
/* Flushes the compression bit cache as well as "data".
* Note: the name here is a bit of a misnomer. ELPG uses this
* internally... but ELPG doesn't have to be on to do it manually.
*/
static void gk20a_mm_g_elpg_flush_locked(struct gk20a *g)
{
u32 data;
s32 retry = 100;
gk20a_dbg_fn("");
trace_gk20a_mm_g_elpg_flush_locked(g->dev->name);
/* Make sure all previous writes are committed to the L2. There's no
guarantee that writes are to DRAM. This will be a sysmembar internal
to the L2. */
gk20a_writel(g, ltc_ltcs_ltss_g_elpg_r(),
ltc_ltcs_ltss_g_elpg_flush_pending_f());
do {
data = gk20a_readl(g, ltc_ltc0_ltss_g_elpg_r());
if (ltc_ltc0_ltss_g_elpg_flush_v(data) ==
ltc_ltc0_ltss_g_elpg_flush_pending_v()) {
gk20a_dbg_info("g_elpg_flush 0x%x", data);
retry--;
udelay(5);
} else
break;
} while (retry >= 0 || !tegra_platform_is_silicon());
if (tegra_platform_is_silicon() && retry < 0)
gk20a_warn(dev_from_gk20a(g),
"g_elpg_flush too many retries");
trace_gk20a_mm_g_elpg_flush_locked_done(g->dev->name);
}
static int gk20a_determine_L2_size_bytes(struct gk20a *g)
{
u32 lts_per_ltc;
u32 ways;
u32 sets;
u32 bytes_per_line;
u32 active_ltcs;
u32 cache_size;
u32 tmp;
u32 active_sets_value;
tmp = gk20a_readl(g, ltc_ltc0_lts0_tstg_cfg1_r());
ways = hweight32(ltc_ltc0_lts0_tstg_cfg1_active_ways_v(tmp));
active_sets_value = ltc_ltc0_lts0_tstg_cfg1_active_sets_v(tmp);
if (active_sets_value == ltc_ltc0_lts0_tstg_cfg1_active_sets_all_v()) {
sets = 64;
} else if (active_sets_value ==
ltc_ltc0_lts0_tstg_cfg1_active_sets_half_v()) {
sets = 32;
} else if (active_sets_value ==
ltc_ltc0_lts0_tstg_cfg1_active_sets_quarter_v()) {
sets = 16;
} else {
dev_err(dev_from_gk20a(g),
"Unknown constant %u for active sets",
(unsigned)active_sets_value);
sets = 0;
}
active_ltcs = g->gr.num_fbps;
/* chip-specific values */
lts_per_ltc = 1;
bytes_per_line = 128;
cache_size = active_ltcs * lts_per_ltc * ways * sets * bytes_per_line;
return cache_size;
}
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.cbc_ctrl = gk20a_ltc_cbc_ctrl;
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;
#ifdef CONFIG_DEBUG_FS
gops->ltc.sync_debugfs = gk20a_ltc_sync_debugfs;
#endif
gops->ltc.elpg_flush = gk20a_mm_g_elpg_flush_locked;
gops->ltc.init_fs_state = gk20a_ltc_init_fs_state;
gops->ltc.isr = gk20a_ltc_isr;
}
