UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity
OpenCloudOS-Kernel/drivers/memory/tegra/tegra20.c

703 lines
18 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <dt-bindings/memory/tegra20-mc.h>
#include "mc.h"
#define MC_STAT_CONTROL 0x90
#define MC_STAT_EMC_CLOCK_LIMIT 0xa0
#define MC_STAT_EMC_CLOCKS 0xa4
#define MC_STAT_EMC_CONTROL_0 0xa8
#define MC_STAT_EMC_CONTROL_1 0xac
#define MC_STAT_EMC_COUNT_0 0xb8
#define MC_STAT_EMC_COUNT_1 0xbc
#define MC_STAT_CONTROL_CLIENT_ID GENMASK(13, 8)
#define MC_STAT_CONTROL_EVENT GENMASK(23, 16)
#define MC_STAT_CONTROL_PRI_EVENT GENMASK(25, 24)
#define MC_STAT_CONTROL_FILTER_CLIENT_ENABLE GENMASK(26, 26)
#define MC_STAT_CONTROL_FILTER_PRI GENMASK(29, 28)
#define MC_STAT_CONTROL_PRI_EVENT_HP 0
#define MC_STAT_CONTROL_PRI_EVENT_TM 1
#define MC_STAT_CONTROL_PRI_EVENT_BW 2
#define MC_STAT_CONTROL_FILTER_PRI_DISABLE 0
#define MC_STAT_CONTROL_FILTER_PRI_NO 1
#define MC_STAT_CONTROL_FILTER_PRI_YES 2
#define MC_STAT_CONTROL_EVENT_QUALIFIED 0
#define MC_STAT_CONTROL_EVENT_ANY_READ 1
#define MC_STAT_CONTROL_EVENT_ANY_WRITE 2
#define MC_STAT_CONTROL_EVENT_RD_WR_CHANGE 3
#define MC_STAT_CONTROL_EVENT_SUCCESSIVE 4
#define MC_STAT_CONTROL_EVENT_ARB_BANK_AA 5
#define MC_STAT_CONTROL_EVENT_ARB_BANK_BB 6
#define MC_STAT_CONTROL_EVENT_PAGE_MISS 7
#define MC_STAT_CONTROL_EVENT_AUTO_PRECHARGE 8
#define EMC_GATHER_RST (0 << 8)
#define EMC_GATHER_CLEAR (1 << 8)
#define EMC_GATHER_DISABLE (2 << 8)
#define EMC_GATHER_ENABLE (3 << 8)
#define MC_STAT_SAMPLE_TIME_USEC 16000
/* we store collected statistics as a fixed point values */
#define MC_FX_FRAC_SCALE 100
static DEFINE_MUTEX(tegra20_mc_stat_lock);
struct tegra20_mc_stat_gather {
unsigned int pri_filter;
unsigned int pri_event;
unsigned int result;
unsigned int client;
unsigned int event;
bool client_enb;
};
struct tegra20_mc_stat {
struct tegra20_mc_stat_gather gather0;
struct tegra20_mc_stat_gather gather1;
unsigned int sample_time_usec;
const struct tegra_mc *mc;
};
struct tegra20_mc_client_stat {
unsigned int events;
unsigned int arb_high_prio;
unsigned int arb_timeout;
unsigned int arb_bandwidth;
unsigned int rd_wr_change;
unsigned int successive;
unsigned int page_miss;
unsigned int auto_precharge;
unsigned int arb_bank_aa;
unsigned int arb_bank_bb;
};
static const struct tegra_mc_client tegra20_mc_clients[] = {
{
.id = 0x00,
.name = "display0a",
}, {
.id = 0x01,
.name = "display0ab",
}, {
.id = 0x02,
.name = "display0b",
}, {
.id = 0x03,
.name = "display0bb",
}, {
.id = 0x04,
.name = "display0c",
}, {
.id = 0x05,
.name = "display0cb",
}, {
.id = 0x06,
.name = "display1b",
}, {
.id = 0x07,
.name = "display1bb",
}, {
.id = 0x08,
.name = "eppup",
}, {
.id = 0x09,
.name = "g2pr",
}, {
.id = 0x0a,
.name = "g2sr",
}, {
.id = 0x0b,
.name = "mpeunifbr",
}, {
.id = 0x0c,
.name = "viruv",
}, {
.id = 0x0d,
.name = "avpcarm7r",
}, {
.id = 0x0e,
.name = "displayhc",
}, {
.id = 0x0f,
.name = "displayhcb",
}, {
.id = 0x10,
.name = "fdcdrd",
}, {
.id = 0x11,
.name = "g2dr",
}, {
.id = 0x12,
.name = "host1xdmar",
}, {
.id = 0x13,
.name = "host1xr",
}, {
.id = 0x14,
.name = "idxsrd",
}, {
.id = 0x15,
.name = "mpcorer",
}, {
.id = 0x16,
.name = "mpe_ipred",
}, {
.id = 0x17,
.name = "mpeamemrd",
}, {
.id = 0x18,
.name = "mpecsrd",
}, {
.id = 0x19,
.name = "ppcsahbdmar",
}, {
.id = 0x1a,
.name = "ppcsahbslvr",
}, {
.id = 0x1b,
.name = "texsrd",
}, {
.id = 0x1c,
.name = "vdebsevr",
}, {
.id = 0x1d,
.name = "vdember",
}, {
.id = 0x1e,
.name = "vdemcer",
}, {
.id = 0x1f,
.name = "vdetper",
}, {
.id = 0x20,
.name = "eppu",
}, {
.id = 0x21,
.name = "eppv",
}, {
.id = 0x22,
.name = "eppy",
}, {
.id = 0x23,
.name = "mpeunifbw",
}, {
.id = 0x24,
.name = "viwsb",
}, {
.id = 0x25,
.name = "viwu",
}, {
.id = 0x26,
.name = "viwv",
}, {
.id = 0x27,
.name = "viwy",
}, {
.id = 0x28,
.name = "g2dw",
}, {
.id = 0x29,
.name = "avpcarm7w",
}, {
.id = 0x2a,
.name = "fdcdwr",
}, {
.id = 0x2b,
.name = "host1xw",
}, {
.id = 0x2c,
.name = "ispw",
}, {
.id = 0x2d,
.name = "mpcorew",
}, {
.id = 0x2e,
.name = "mpecswr",
}, {
.id = 0x2f,
.name = "ppcsahbdmaw",
}, {
.id = 0x30,
.name = "ppcsahbslvw",
}, {
.id = 0x31,
.name = "vdebsevw",
}, {
.id = 0x32,
.name = "vdembew",
}, {
.id = 0x33,
.name = "vdetpmw",
},
};
#define TEGRA20_MC_RESET(_name, _control, _status, _reset, _bit) \
{ \
.name = #_name, \
.id = TEGRA20_MC_RESET_##_name, \
.control = _control, \
.status = _status, \
.reset = _reset, \
.bit = _bit, \
}
static const struct tegra_mc_reset tegra20_mc_resets[] = {
TEGRA20_MC_RESET(AVPC, 0x100, 0x140, 0x104, 0),
TEGRA20_MC_RESET(DC, 0x100, 0x144, 0x104, 1),
TEGRA20_MC_RESET(DCB, 0x100, 0x148, 0x104, 2),
TEGRA20_MC_RESET(EPP, 0x100, 0x14c, 0x104, 3),
TEGRA20_MC_RESET(2D, 0x100, 0x150, 0x104, 4),
TEGRA20_MC_RESET(HC, 0x100, 0x154, 0x104, 5),
TEGRA20_MC_RESET(ISP, 0x100, 0x158, 0x104, 6),
TEGRA20_MC_RESET(MPCORE, 0x100, 0x15c, 0x104, 7),
TEGRA20_MC_RESET(MPEA, 0x100, 0x160, 0x104, 8),
TEGRA20_MC_RESET(MPEB, 0x100, 0x164, 0x104, 9),
TEGRA20_MC_RESET(MPEC, 0x100, 0x168, 0x104, 10),
TEGRA20_MC_RESET(3D, 0x100, 0x16c, 0x104, 11),
TEGRA20_MC_RESET(PPCS, 0x100, 0x170, 0x104, 12),
TEGRA20_MC_RESET(VDE, 0x100, 0x174, 0x104, 13),
TEGRA20_MC_RESET(VI, 0x100, 0x178, 0x104, 14),
};
static int tegra20_mc_hotreset_assert(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
unsigned long flags;
u32 value;
spin_lock_irqsave(&mc->lock, flags);
value = mc_readl(mc, rst->reset);
mc_writel(mc, value & ~BIT(rst->bit), rst->reset);
spin_unlock_irqrestore(&mc->lock, flags);
return 0;
}
static int tegra20_mc_hotreset_deassert(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
unsigned long flags;
u32 value;
spin_lock_irqsave(&mc->lock, flags);
value = mc_readl(mc, rst->reset);
mc_writel(mc, value | BIT(rst->bit), rst->reset);
spin_unlock_irqrestore(&mc->lock, flags);
return 0;
}
static int tegra20_mc_block_dma(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
unsigned long flags;
u32 value;
spin_lock_irqsave(&mc->lock, flags);
value = mc_readl(mc, rst->control) & ~BIT(rst->bit);
mc_writel(mc, value, rst->control);
spin_unlock_irqrestore(&mc->lock, flags);
return 0;
}
static bool tegra20_mc_dma_idling(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
return mc_readl(mc, rst->status) == 0;
}
static int tegra20_mc_reset_status(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
return (mc_readl(mc, rst->reset) & BIT(rst->bit)) == 0;
}
static int tegra20_mc_unblock_dma(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
unsigned long flags;
u32 value;
spin_lock_irqsave(&mc->lock, flags);
value = mc_readl(mc, rst->control) | BIT(rst->bit);
mc_writel(mc, value, rst->control);
spin_unlock_irqrestore(&mc->lock, flags);
return 0;
}
static const struct tegra_mc_reset_ops tegra20_mc_reset_ops = {
.hotreset_assert = tegra20_mc_hotreset_assert,
.hotreset_deassert = tegra20_mc_hotreset_deassert,
.block_dma = tegra20_mc_block_dma,
.dma_idling = tegra20_mc_dma_idling,
.unblock_dma = tegra20_mc_unblock_dma,
.reset_status = tegra20_mc_reset_status,
};
static int tegra20_mc_icc_set(struct icc_node *src, struct icc_node *dst)
{
/*
* It should be possible to tune arbitration knobs here, but the
* default values are known to work well on all devices. Hence
* nothing to do here so far.
*/
return 0;
}
static int tegra20_mc_icc_aggreate(struct icc_node *node, u32 tag, u32 avg_bw,
u32 peak_bw, u32 *agg_avg, u32 *agg_peak)
{
/*
* ISO clients need to reserve extra bandwidth up-front because
* there could be high bandwidth pressure during initial filling
* of the client's FIFO buffers. Secondly, we need to take into
* account impurities of the memory subsystem.
*/
if (tag & TEGRA_MC_ICC_TAG_ISO)
peak_bw = tegra_mc_scale_percents(peak_bw, 300);
*agg_avg += avg_bw;
*agg_peak = max(*agg_peak, peak_bw);
return 0;
}
static struct icc_node_data *
tegra20_mc_of_icc_xlate_extended(struct of_phandle_args *spec, void *data)
{
struct tegra_mc *mc = icc_provider_to_tegra_mc(data);
unsigned int i, idx = spec->args[0];
struct icc_node_data *ndata;
struct icc_node *node;
list_for_each_entry(node, &mc->provider.nodes, node_list) {
if (node->id != idx)
continue;
ndata = kzalloc(sizeof(*ndata), GFP_KERNEL);
if (!ndata)
return ERR_PTR(-ENOMEM);
ndata->node = node;
/* these clients are isochronous by default */
if (strstarts(node->name, "display") ||
strstarts(node->name, "vi"))
ndata->tag = TEGRA_MC_ICC_TAG_ISO;
else
ndata->tag = TEGRA_MC_ICC_TAG_DEFAULT;
return ndata;
}
for (i = 0; i < mc->soc->num_clients; i++) {
if (mc->soc->clients[i].id == idx)
return ERR_PTR(-EPROBE_DEFER);
}
dev_err(mc->dev, "invalid ICC client ID %u\n", idx);
return ERR_PTR(-EINVAL);
}
static const struct tegra_mc_icc_ops tegra20_mc_icc_ops = {
.xlate_extended = tegra20_mc_of_icc_xlate_extended,
.aggregate = tegra20_mc_icc_aggreate,
.set = tegra20_mc_icc_set,
};
static u32 tegra20_mc_stat_gather_control(const struct tegra20_mc_stat_gather *g)
{
u32 control;
control = FIELD_PREP(MC_STAT_CONTROL_EVENT, g->event);
control |= FIELD_PREP(MC_STAT_CONTROL_CLIENT_ID, g->client);
control |= FIELD_PREP(MC_STAT_CONTROL_PRI_EVENT, g->pri_event);
control |= FIELD_PREP(MC_STAT_CONTROL_FILTER_PRI, g->pri_filter);
control |= FIELD_PREP(MC_STAT_CONTROL_FILTER_CLIENT_ENABLE, g->client_enb);
return control;
}
static void tegra20_mc_stat_gather(struct tegra20_mc_stat *stat)
{
u32 clocks, count0, count1, control_0, control_1;
const struct tegra_mc *mc = stat->mc;
control_0 = tegra20_mc_stat_gather_control(&stat->gather0);
control_1 = tegra20_mc_stat_gather_control(&stat->gather1);
/*
* Reset statistic gathers state, select statistics collection mode
* and set clocks counter saturation limit to maximum.
*/
mc_writel(mc, 0x00000000, MC_STAT_CONTROL);
mc_writel(mc, control_0, MC_STAT_EMC_CONTROL_0);
mc_writel(mc, control_1, MC_STAT_EMC_CONTROL_1);
mc_writel(mc, 0xffffffff, MC_STAT_EMC_CLOCK_LIMIT);
mc_writel(mc, EMC_GATHER_ENABLE, MC_STAT_CONTROL);
fsleep(stat->sample_time_usec);
mc_writel(mc, EMC_GATHER_DISABLE, MC_STAT_CONTROL);
count0 = mc_readl(mc, MC_STAT_EMC_COUNT_0);
count1 = mc_readl(mc, MC_STAT_EMC_COUNT_1);
clocks = mc_readl(mc, MC_STAT_EMC_CLOCKS);
clocks = max(clocks / 100 / MC_FX_FRAC_SCALE, 1u);
stat->gather0.result = DIV_ROUND_UP(count0, clocks);
stat->gather1.result = DIV_ROUND_UP(count1, clocks);
}
static void tegra20_mc_stat_events(const struct tegra_mc *mc,
const struct tegra_mc_client *client0,
const struct tegra_mc_client *client1,
unsigned int pri_filter,
unsigned int pri_event,
unsigned int event,
unsigned int *result0,
unsigned int *result1)
{
struct tegra20_mc_stat stat = {};
stat.gather0.client = client0 ? client0->id : 0;
stat.gather0.pri_filter = pri_filter;
stat.gather0.client_enb = !!client0;
stat.gather0.pri_event = pri_event;
stat.gather0.event = event;
stat.gather1.client = client1 ? client1->id : 0;
stat.gather1.pri_filter = pri_filter;
stat.gather1.client_enb = !!client1;
stat.gather1.pri_event = pri_event;
stat.gather1.event = event;
stat.sample_time_usec = MC_STAT_SAMPLE_TIME_USEC;
stat.mc = mc;
tegra20_mc_stat_gather(&stat);
*result0 = stat.gather0.result;
*result1 = stat.gather1.result;
}
static void tegra20_mc_collect_stats(const struct tegra_mc *mc,
struct tegra20_mc_client_stat *stats)
{
const struct tegra_mc_client *client0, *client1;
unsigned int i;
/* collect memory controller utilization percent for each client */
for (i = 0; i < mc->soc->num_clients; i += 2) {
client0 = &mc->soc->clients[i];
client1 = &mc->soc->clients[i + 1];
if (i + 1 == mc->soc->num_clients)
client1 = NULL;
tegra20_mc_stat_events(mc, client0, client1,
MC_STAT_CONTROL_FILTER_PRI_DISABLE,
MC_STAT_CONTROL_PRI_EVENT_HP,
MC_STAT_CONTROL_EVENT_QUALIFIED,
&stats[i + 0].events,
&stats[i + 1].events);
}
/* collect more info from active clients */
for (i = 0; i < mc->soc->num_clients; i++) {
unsigned int clienta, clientb = mc->soc->num_clients;
for (client0 = NULL; i < mc->soc->num_clients; i++) {
if (stats[i].events) {
client0 = &mc->soc->clients[i];
clienta = i++;
break;
}
}
for (client1 = NULL; i < mc->soc->num_clients; i++) {
if (stats[i].events) {
client1 = &mc->soc->clients[i];
clientb = i;
break;
}
}
if (!client0 && !client1)
break;
tegra20_mc_stat_events(mc, client0, client1,
MC_STAT_CONTROL_FILTER_PRI_YES,
MC_STAT_CONTROL_PRI_EVENT_HP,
MC_STAT_CONTROL_EVENT_QUALIFIED,
&stats[clienta].arb_high_prio,
&stats[clientb].arb_high_prio);
tegra20_mc_stat_events(mc, client0, client1,
MC_STAT_CONTROL_FILTER_PRI_YES,
MC_STAT_CONTROL_PRI_EVENT_TM,
MC_STAT_CONTROL_EVENT_QUALIFIED,
&stats[clienta].arb_timeout,
&stats[clientb].arb_timeout);
tegra20_mc_stat_events(mc, client0, client1,
MC_STAT_CONTROL_FILTER_PRI_YES,
MC_STAT_CONTROL_PRI_EVENT_BW,
MC_STAT_CONTROL_EVENT_QUALIFIED,
&stats[clienta].arb_bandwidth,
&stats[clientb].arb_bandwidth);
tegra20_mc_stat_events(mc, client0, client1,
MC_STAT_CONTROL_FILTER_PRI_DISABLE,
MC_STAT_CONTROL_PRI_EVENT_HP,
MC_STAT_CONTROL_EVENT_RD_WR_CHANGE,
&stats[clienta].rd_wr_change,
&stats[clientb].rd_wr_change);
tegra20_mc_stat_events(mc, client0, client1,
MC_STAT_CONTROL_FILTER_PRI_DISABLE,
MC_STAT_CONTROL_PRI_EVENT_HP,
MC_STAT_CONTROL_EVENT_SUCCESSIVE,
&stats[clienta].successive,
&stats[clientb].successive);
tegra20_mc_stat_events(mc, client0, client1,
MC_STAT_CONTROL_FILTER_PRI_DISABLE,
MC_STAT_CONTROL_PRI_EVENT_HP,
MC_STAT_CONTROL_EVENT_PAGE_MISS,
&stats[clienta].page_miss,
&stats[clientb].page_miss);
}
}
static void tegra20_mc_printf_percents(struct seq_file *s,
const char *fmt,
unsigned int percents_fx)
{
char percents_str[8];
snprintf(percents_str, ARRAY_SIZE(percents_str), "%3u.%02u%%",
percents_fx / MC_FX_FRAC_SCALE, percents_fx % MC_FX_FRAC_SCALE);
seq_printf(s, fmt, percents_str);
}
static int tegra20_mc_stats_show(struct seq_file *s, void *unused)
{
const struct tegra_mc *mc = dev_get_drvdata(s->private);
struct tegra20_mc_client_stat *stats;
unsigned int i;
stats = kcalloc(mc->soc->num_clients + 1, sizeof(*stats), GFP_KERNEL);
if (!stats)
return -ENOMEM;
mutex_lock(&tegra20_mc_stat_lock);
tegra20_mc_collect_stats(mc, stats);
mutex_unlock(&tegra20_mc_stat_lock);
seq_puts(s, "Memory client Events Timeout High priority Bandwidth ARB RW change Successive Page miss\n");
seq_puts(s, "-----------------------------------------------------------------------------------------------------\n");
for (i = 0; i < mc->soc->num_clients; i++) {
seq_printf(s, "%-14s ", mc->soc->clients[i].name);
/* An event is generated when client performs R/W request. */
tegra20_mc_printf_percents(s, "%-9s", stats[i].events);
/*
* An event is generated based on the timeout (TM) signal
* accompanying a request for arbitration.
*/
tegra20_mc_printf_percents(s, "%-10s", stats[i].arb_timeout);
/*
* An event is generated based on the high-priority (HP) signal
* accompanying a request for arbitration.
*/
tegra20_mc_printf_percents(s, "%-16s", stats[i].arb_high_prio);
/*
* An event is generated based on the bandwidth (BW) signal
* accompanying a request for arbitration.
*/
tegra20_mc_printf_percents(s, "%-16s", stats[i].arb_bandwidth);
/*
* An event is generated when the memory controller switches
* between making a read request to making a write request.
*/
tegra20_mc_printf_percents(s, "%-12s", stats[i].rd_wr_change);
/*
* An even generated when the chosen client has wins arbitration
* when it was also the winner at the previous request. If a
* client makes N requests in a row that are honored, SUCCESSIVE
* will be counted (N-1) times. Large values for this event
* imply that if we were patient enough, all of those requests
* could have been coalesced.
*/
tegra20_mc_printf_percents(s, "%-13s", stats[i].successive);
/*
* An event is generated when the memory controller detects a
* page miss for the current request.
*/
tegra20_mc_printf_percents(s, "%-12s\n", stats[i].page_miss);
}
kfree(stats);
return 0;
}
static int tegra20_mc_init(struct tegra_mc *mc)
{
debugfs_create_devm_seqfile(mc->dev, "stats", mc->debugfs.root,
tegra20_mc_stats_show);
return 0;
}
const struct tegra_mc_soc tegra20_mc_soc = {
.clients = tegra20_mc_clients,
.num_clients = ARRAY_SIZE(tegra20_mc_clients),
.num_address_bits = 32,
.client_id_mask = 0x3f,
.intmask = MC_INT_SECURITY_VIOLATION | MC_INT_INVALID_GART_PAGE |
MC_INT_DECERR_EMEM,
.reset_ops = &tegra20_mc_reset_ops,
.resets = tegra20_mc_resets,
.num_resets = ARRAY_SIZE(tegra20_mc_resets),
.icc_ops = &tegra20_mc_icc_ops,
.init = tegra20_mc_init,
};
Reference in New Issue View Git Blame Copy Permalink