mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Mikko Perttunen](/assets/img/avatar_default.png)
On Tegra194, due to both BPMP and TCU using mailboxes, we get a lockdep spew at boot. Both are using different instances of HSP, so this is harmless. As such give each HSP instance a different lockdep class. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
858 lines
20 KiB
C
858 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2016-2018, NVIDIA CORPORATION. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/mailbox_controller.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <soc/tegra/fuse.h>
|
|
|
|
#include <dt-bindings/mailbox/tegra186-hsp.h>
|
|
|
|
#include "mailbox.h"
|
|
|
|
#define HSP_INT_IE(x) (0x100 + ((x) * 4))
|
|
#define HSP_INT_IV 0x300
|
|
#define HSP_INT_IR 0x304
|
|
|
|
#define HSP_INT_EMPTY_SHIFT 0
|
|
#define HSP_INT_EMPTY_MASK 0xff
|
|
#define HSP_INT_FULL_SHIFT 8
|
|
#define HSP_INT_FULL_MASK 0xff
|
|
|
|
#define HSP_INT_DIMENSIONING 0x380
|
|
#define HSP_nSM_SHIFT 0
|
|
#define HSP_nSS_SHIFT 4
|
|
#define HSP_nAS_SHIFT 8
|
|
#define HSP_nDB_SHIFT 12
|
|
#define HSP_nSI_SHIFT 16
|
|
#define HSP_nINT_MASK 0xf
|
|
|
|
#define HSP_DB_TRIGGER 0x0
|
|
#define HSP_DB_ENABLE 0x4
|
|
#define HSP_DB_RAW 0x8
|
|
#define HSP_DB_PENDING 0xc
|
|
|
|
#define HSP_SM_SHRD_MBOX 0x0
|
|
#define HSP_SM_SHRD_MBOX_FULL BIT(31)
|
|
#define HSP_SM_SHRD_MBOX_FULL_INT_IE 0x04
|
|
#define HSP_SM_SHRD_MBOX_EMPTY_INT_IE 0x08
|
|
|
|
#define HSP_DB_CCPLEX 1
|
|
#define HSP_DB_BPMP 3
|
|
#define HSP_DB_MAX 7
|
|
|
|
struct tegra_hsp_channel;
|
|
struct tegra_hsp;
|
|
|
|
struct tegra_hsp_channel {
|
|
struct tegra_hsp *hsp;
|
|
struct mbox_chan *chan;
|
|
void __iomem *regs;
|
|
};
|
|
|
|
struct tegra_hsp_doorbell {
|
|
struct tegra_hsp_channel channel;
|
|
struct list_head list;
|
|
const char *name;
|
|
unsigned int master;
|
|
unsigned int index;
|
|
};
|
|
|
|
struct tegra_hsp_mailbox {
|
|
struct tegra_hsp_channel channel;
|
|
unsigned int index;
|
|
bool producer;
|
|
};
|
|
|
|
struct tegra_hsp_db_map {
|
|
const char *name;
|
|
unsigned int master;
|
|
unsigned int index;
|
|
};
|
|
|
|
struct tegra_hsp_soc {
|
|
const struct tegra_hsp_db_map *map;
|
|
bool has_per_mb_ie;
|
|
};
|
|
|
|
struct tegra_hsp {
|
|
struct device *dev;
|
|
const struct tegra_hsp_soc *soc;
|
|
struct mbox_controller mbox_db;
|
|
struct mbox_controller mbox_sm;
|
|
void __iomem *regs;
|
|
unsigned int doorbell_irq;
|
|
unsigned int *shared_irqs;
|
|
unsigned int shared_irq;
|
|
unsigned int num_sm;
|
|
unsigned int num_as;
|
|
unsigned int num_ss;
|
|
unsigned int num_db;
|
|
unsigned int num_si;
|
|
|
|
spinlock_t lock;
|
|
struct lock_class_key lock_key;
|
|
|
|
struct list_head doorbells;
|
|
struct tegra_hsp_mailbox *mailboxes;
|
|
|
|
unsigned long mask;
|
|
};
|
|
|
|
static inline u32 tegra_hsp_readl(struct tegra_hsp *hsp, unsigned int offset)
|
|
{
|
|
return readl(hsp->regs + offset);
|
|
}
|
|
|
|
static inline void tegra_hsp_writel(struct tegra_hsp *hsp, u32 value,
|
|
unsigned int offset)
|
|
{
|
|
writel(value, hsp->regs + offset);
|
|
}
|
|
|
|
static inline u32 tegra_hsp_channel_readl(struct tegra_hsp_channel *channel,
|
|
unsigned int offset)
|
|
{
|
|
return readl(channel->regs + offset);
|
|
}
|
|
|
|
static inline void tegra_hsp_channel_writel(struct tegra_hsp_channel *channel,
|
|
u32 value, unsigned int offset)
|
|
{
|
|
writel(value, channel->regs + offset);
|
|
}
|
|
|
|
static bool tegra_hsp_doorbell_can_ring(struct tegra_hsp_doorbell *db)
|
|
{
|
|
u32 value;
|
|
|
|
value = tegra_hsp_channel_readl(&db->channel, HSP_DB_ENABLE);
|
|
|
|
return (value & BIT(TEGRA_HSP_DB_MASTER_CCPLEX)) != 0;
|
|
}
|
|
|
|
static struct tegra_hsp_doorbell *
|
|
__tegra_hsp_doorbell_get(struct tegra_hsp *hsp, unsigned int master)
|
|
{
|
|
struct tegra_hsp_doorbell *entry;
|
|
|
|
list_for_each_entry(entry, &hsp->doorbells, list)
|
|
if (entry->master == master)
|
|
return entry;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct tegra_hsp_doorbell *
|
|
tegra_hsp_doorbell_get(struct tegra_hsp *hsp, unsigned int master)
|
|
{
|
|
struct tegra_hsp_doorbell *db;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
db = __tegra_hsp_doorbell_get(hsp, master);
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
|
|
return db;
|
|
}
|
|
|
|
static irqreturn_t tegra_hsp_doorbell_irq(int irq, void *data)
|
|
{
|
|
struct tegra_hsp *hsp = data;
|
|
struct tegra_hsp_doorbell *db;
|
|
unsigned long master, value;
|
|
|
|
db = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
|
|
if (!db)
|
|
return IRQ_NONE;
|
|
|
|
value = tegra_hsp_channel_readl(&db->channel, HSP_DB_PENDING);
|
|
tegra_hsp_channel_writel(&db->channel, value, HSP_DB_PENDING);
|
|
|
|
spin_lock(&hsp->lock);
|
|
|
|
for_each_set_bit(master, &value, hsp->mbox_db.num_chans) {
|
|
struct tegra_hsp_doorbell *db;
|
|
|
|
db = __tegra_hsp_doorbell_get(hsp, master);
|
|
/*
|
|
* Depending on the bootloader chain, the CCPLEX doorbell will
|
|
* have some doorbells enabled, which means that requesting an
|
|
* interrupt will immediately fire.
|
|
*
|
|
* In that case, db->channel.chan will still be NULL here and
|
|
* cause a crash if not properly guarded.
|
|
*
|
|
* It remains to be seen if ignoring the doorbell in that case
|
|
* is the correct solution.
|
|
*/
|
|
if (db && db->channel.chan)
|
|
mbox_chan_received_data(db->channel.chan, NULL);
|
|
}
|
|
|
|
spin_unlock(&hsp->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t tegra_hsp_shared_irq(int irq, void *data)
|
|
{
|
|
struct tegra_hsp *hsp = data;
|
|
unsigned long bit, mask;
|
|
u32 status, value;
|
|
void *msg;
|
|
|
|
status = tegra_hsp_readl(hsp, HSP_INT_IR) & hsp->mask;
|
|
|
|
/* process EMPTY interrupts first */
|
|
mask = (status >> HSP_INT_EMPTY_SHIFT) & HSP_INT_EMPTY_MASK;
|
|
|
|
for_each_set_bit(bit, &mask, hsp->num_sm) {
|
|
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[bit];
|
|
|
|
if (mb->producer) {
|
|
/*
|
|
* Disable EMPTY interrupts until data is sent with
|
|
* the next message. These interrupts are level-
|
|
* triggered, so if we kept them enabled they would
|
|
* constantly trigger until we next write data into
|
|
* the message.
|
|
*/
|
|
spin_lock(&hsp->lock);
|
|
|
|
hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
|
|
tegra_hsp_writel(hsp, hsp->mask,
|
|
HSP_INT_IE(hsp->shared_irq));
|
|
|
|
spin_unlock(&hsp->lock);
|
|
|
|
mbox_chan_txdone(mb->channel.chan, 0);
|
|
}
|
|
}
|
|
|
|
/* process FULL interrupts */
|
|
mask = (status >> HSP_INT_FULL_SHIFT) & HSP_INT_FULL_MASK;
|
|
|
|
for_each_set_bit(bit, &mask, hsp->num_sm) {
|
|
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[bit];
|
|
|
|
if (!mb->producer) {
|
|
value = tegra_hsp_channel_readl(&mb->channel,
|
|
HSP_SM_SHRD_MBOX);
|
|
value &= ~HSP_SM_SHRD_MBOX_FULL;
|
|
msg = (void *)(unsigned long)value;
|
|
mbox_chan_received_data(mb->channel.chan, msg);
|
|
|
|
/*
|
|
* Need to clear all bits here since some producers,
|
|
* such as TCU, depend on fields in the register
|
|
* getting cleared by the consumer.
|
|
*
|
|
* The mailbox API doesn't give the consumers a way
|
|
* of doing that explicitly, so we have to make sure
|
|
* we cover all possible cases.
|
|
*/
|
|
tegra_hsp_channel_writel(&mb->channel, 0x0,
|
|
HSP_SM_SHRD_MBOX);
|
|
}
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct tegra_hsp_channel *
|
|
tegra_hsp_doorbell_create(struct tegra_hsp *hsp, const char *name,
|
|
unsigned int master, unsigned int index)
|
|
{
|
|
struct tegra_hsp_doorbell *db;
|
|
unsigned int offset;
|
|
unsigned long flags;
|
|
|
|
db = devm_kzalloc(hsp->dev, sizeof(*db), GFP_KERNEL);
|
|
if (!db)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
offset = (1 + (hsp->num_sm / 2) + hsp->num_ss + hsp->num_as) * SZ_64K;
|
|
offset += index * 0x100;
|
|
|
|
db->channel.regs = hsp->regs + offset;
|
|
db->channel.hsp = hsp;
|
|
|
|
db->name = devm_kstrdup_const(hsp->dev, name, GFP_KERNEL);
|
|
db->master = master;
|
|
db->index = index;
|
|
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
list_add_tail(&db->list, &hsp->doorbells);
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
|
|
return &db->channel;
|
|
}
|
|
|
|
static int tegra_hsp_doorbell_send_data(struct mbox_chan *chan, void *data)
|
|
{
|
|
struct tegra_hsp_doorbell *db = chan->con_priv;
|
|
|
|
tegra_hsp_channel_writel(&db->channel, 1, HSP_DB_TRIGGER);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_hsp_doorbell_startup(struct mbox_chan *chan)
|
|
{
|
|
struct tegra_hsp_doorbell *db = chan->con_priv;
|
|
struct tegra_hsp *hsp = db->channel.hsp;
|
|
struct tegra_hsp_doorbell *ccplex;
|
|
unsigned long flags;
|
|
u32 value;
|
|
|
|
if (db->master >= chan->mbox->num_chans) {
|
|
dev_err(chan->mbox->dev,
|
|
"invalid master ID %u for HSP channel\n",
|
|
db->master);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ccplex = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
|
|
if (!ccplex)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* On simulation platforms the BPMP hasn't had a chance yet to mark
|
|
* the doorbell as ringable by the CCPLEX, so we want to skip extra
|
|
* checks here.
|
|
*/
|
|
if (tegra_is_silicon() && !tegra_hsp_doorbell_can_ring(db))
|
|
return -ENODEV;
|
|
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
|
|
value = tegra_hsp_channel_readl(&ccplex->channel, HSP_DB_ENABLE);
|
|
value |= BIT(db->master);
|
|
tegra_hsp_channel_writel(&ccplex->channel, value, HSP_DB_ENABLE);
|
|
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tegra_hsp_doorbell_shutdown(struct mbox_chan *chan)
|
|
{
|
|
struct tegra_hsp_doorbell *db = chan->con_priv;
|
|
struct tegra_hsp *hsp = db->channel.hsp;
|
|
struct tegra_hsp_doorbell *ccplex;
|
|
unsigned long flags;
|
|
u32 value;
|
|
|
|
ccplex = tegra_hsp_doorbell_get(hsp, TEGRA_HSP_DB_MASTER_CCPLEX);
|
|
if (!ccplex)
|
|
return;
|
|
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
|
|
value = tegra_hsp_channel_readl(&ccplex->channel, HSP_DB_ENABLE);
|
|
value &= ~BIT(db->master);
|
|
tegra_hsp_channel_writel(&ccplex->channel, value, HSP_DB_ENABLE);
|
|
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
}
|
|
|
|
static const struct mbox_chan_ops tegra_hsp_db_ops = {
|
|
.send_data = tegra_hsp_doorbell_send_data,
|
|
.startup = tegra_hsp_doorbell_startup,
|
|
.shutdown = tegra_hsp_doorbell_shutdown,
|
|
};
|
|
|
|
static int tegra_hsp_mailbox_send_data(struct mbox_chan *chan, void *data)
|
|
{
|
|
struct tegra_hsp_mailbox *mb = chan->con_priv;
|
|
struct tegra_hsp *hsp = mb->channel.hsp;
|
|
unsigned long flags;
|
|
u32 value;
|
|
|
|
if (WARN_ON(!mb->producer))
|
|
return -EPERM;
|
|
|
|
/* copy data and mark mailbox full */
|
|
value = (u32)(unsigned long)data;
|
|
value |= HSP_SM_SHRD_MBOX_FULL;
|
|
|
|
tegra_hsp_channel_writel(&mb->channel, value, HSP_SM_SHRD_MBOX);
|
|
|
|
/* enable EMPTY interrupt for the shared mailbox */
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
|
|
hsp->mask |= BIT(HSP_INT_EMPTY_SHIFT + mb->index);
|
|
tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
|
|
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_hsp_mailbox_flush(struct mbox_chan *chan,
|
|
unsigned long timeout)
|
|
{
|
|
struct tegra_hsp_mailbox *mb = chan->con_priv;
|
|
struct tegra_hsp_channel *ch = &mb->channel;
|
|
u32 value;
|
|
|
|
timeout = jiffies + msecs_to_jiffies(timeout);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
value = tegra_hsp_channel_readl(ch, HSP_SM_SHRD_MBOX);
|
|
if ((value & HSP_SM_SHRD_MBOX_FULL) == 0) {
|
|
mbox_chan_txdone(chan, 0);
|
|
return 0;
|
|
}
|
|
|
|
udelay(1);
|
|
}
|
|
|
|
return -ETIME;
|
|
}
|
|
|
|
static int tegra_hsp_mailbox_startup(struct mbox_chan *chan)
|
|
{
|
|
struct tegra_hsp_mailbox *mb = chan->con_priv;
|
|
struct tegra_hsp_channel *ch = &mb->channel;
|
|
struct tegra_hsp *hsp = mb->channel.hsp;
|
|
unsigned long flags;
|
|
|
|
chan->txdone_method = TXDONE_BY_IRQ;
|
|
|
|
/*
|
|
* Shared mailboxes start out as consumers by default. FULL and EMPTY
|
|
* interrupts are coalesced at the same shared interrupt.
|
|
*
|
|
* Keep EMPTY interrupts disabled at startup and only enable them when
|
|
* the mailbox is actually full. This is required because the FULL and
|
|
* EMPTY interrupts are level-triggered, so keeping EMPTY interrupts
|
|
* enabled all the time would cause an interrupt storm while mailboxes
|
|
* are idle.
|
|
*/
|
|
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
|
|
if (mb->producer)
|
|
hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
|
|
else
|
|
hsp->mask |= BIT(HSP_INT_FULL_SHIFT + mb->index);
|
|
|
|
tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
|
|
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
|
|
if (hsp->soc->has_per_mb_ie) {
|
|
if (mb->producer)
|
|
tegra_hsp_channel_writel(ch, 0x0,
|
|
HSP_SM_SHRD_MBOX_EMPTY_INT_IE);
|
|
else
|
|
tegra_hsp_channel_writel(ch, 0x1,
|
|
HSP_SM_SHRD_MBOX_FULL_INT_IE);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tegra_hsp_mailbox_shutdown(struct mbox_chan *chan)
|
|
{
|
|
struct tegra_hsp_mailbox *mb = chan->con_priv;
|
|
struct tegra_hsp_channel *ch = &mb->channel;
|
|
struct tegra_hsp *hsp = mb->channel.hsp;
|
|
unsigned long flags;
|
|
|
|
if (hsp->soc->has_per_mb_ie) {
|
|
if (mb->producer)
|
|
tegra_hsp_channel_writel(ch, 0x0,
|
|
HSP_SM_SHRD_MBOX_EMPTY_INT_IE);
|
|
else
|
|
tegra_hsp_channel_writel(ch, 0x0,
|
|
HSP_SM_SHRD_MBOX_FULL_INT_IE);
|
|
}
|
|
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
|
|
if (mb->producer)
|
|
hsp->mask &= ~BIT(HSP_INT_EMPTY_SHIFT + mb->index);
|
|
else
|
|
hsp->mask &= ~BIT(HSP_INT_FULL_SHIFT + mb->index);
|
|
|
|
tegra_hsp_writel(hsp, hsp->mask, HSP_INT_IE(hsp->shared_irq));
|
|
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
}
|
|
|
|
static const struct mbox_chan_ops tegra_hsp_sm_ops = {
|
|
.send_data = tegra_hsp_mailbox_send_data,
|
|
.flush = tegra_hsp_mailbox_flush,
|
|
.startup = tegra_hsp_mailbox_startup,
|
|
.shutdown = tegra_hsp_mailbox_shutdown,
|
|
};
|
|
|
|
static struct mbox_chan *tegra_hsp_db_xlate(struct mbox_controller *mbox,
|
|
const struct of_phandle_args *args)
|
|
{
|
|
struct tegra_hsp *hsp = container_of(mbox, struct tegra_hsp, mbox_db);
|
|
unsigned int type = args->args[0], master = args->args[1];
|
|
struct tegra_hsp_channel *channel = ERR_PTR(-ENODEV);
|
|
struct tegra_hsp_doorbell *db;
|
|
struct mbox_chan *chan;
|
|
unsigned long flags;
|
|
unsigned int i;
|
|
|
|
if (type != TEGRA_HSP_MBOX_TYPE_DB || !hsp->doorbell_irq)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
db = tegra_hsp_doorbell_get(hsp, master);
|
|
if (db)
|
|
channel = &db->channel;
|
|
|
|
if (IS_ERR(channel))
|
|
return ERR_CAST(channel);
|
|
|
|
spin_lock_irqsave(&hsp->lock, flags);
|
|
|
|
for (i = 0; i < mbox->num_chans; i++) {
|
|
chan = &mbox->chans[i];
|
|
if (!chan->con_priv) {
|
|
channel->chan = chan;
|
|
chan->con_priv = db;
|
|
break;
|
|
}
|
|
|
|
chan = NULL;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&hsp->lock, flags);
|
|
|
|
return chan ?: ERR_PTR(-EBUSY);
|
|
}
|
|
|
|
static struct mbox_chan *tegra_hsp_sm_xlate(struct mbox_controller *mbox,
|
|
const struct of_phandle_args *args)
|
|
{
|
|
struct tegra_hsp *hsp = container_of(mbox, struct tegra_hsp, mbox_sm);
|
|
unsigned int type = args->args[0], index;
|
|
struct tegra_hsp_mailbox *mb;
|
|
|
|
index = args->args[1] & TEGRA_HSP_SM_MASK;
|
|
|
|
if (type != TEGRA_HSP_MBOX_TYPE_SM || !hsp->shared_irqs ||
|
|
index >= hsp->num_sm)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
mb = &hsp->mailboxes[index];
|
|
|
|
if ((args->args[1] & TEGRA_HSP_SM_FLAG_TX) == 0)
|
|
mb->producer = false;
|
|
else
|
|
mb->producer = true;
|
|
|
|
return mb->channel.chan;
|
|
}
|
|
|
|
static int tegra_hsp_add_doorbells(struct tegra_hsp *hsp)
|
|
{
|
|
const struct tegra_hsp_db_map *map = hsp->soc->map;
|
|
struct tegra_hsp_channel *channel;
|
|
|
|
while (map->name) {
|
|
channel = tegra_hsp_doorbell_create(hsp, map->name,
|
|
map->master, map->index);
|
|
if (IS_ERR(channel))
|
|
return PTR_ERR(channel);
|
|
|
|
map++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_hsp_add_mailboxes(struct tegra_hsp *hsp, struct device *dev)
|
|
{
|
|
int i;
|
|
|
|
hsp->mailboxes = devm_kcalloc(dev, hsp->num_sm, sizeof(*hsp->mailboxes),
|
|
GFP_KERNEL);
|
|
if (!hsp->mailboxes)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < hsp->num_sm; i++) {
|
|
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
|
|
|
|
mb->index = i;
|
|
|
|
mb->channel.hsp = hsp;
|
|
mb->channel.regs = hsp->regs + SZ_64K + i * SZ_32K;
|
|
mb->channel.chan = &hsp->mbox_sm.chans[i];
|
|
mb->channel.chan->con_priv = mb;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_hsp_request_shared_irq(struct tegra_hsp *hsp)
|
|
{
|
|
unsigned int i, irq = 0;
|
|
int err;
|
|
|
|
for (i = 0; i < hsp->num_si; i++) {
|
|
irq = hsp->shared_irqs[i];
|
|
if (irq <= 0)
|
|
continue;
|
|
|
|
err = devm_request_irq(hsp->dev, irq, tegra_hsp_shared_irq, 0,
|
|
dev_name(hsp->dev), hsp);
|
|
if (err < 0) {
|
|
dev_err(hsp->dev, "failed to request interrupt: %d\n",
|
|
err);
|
|
continue;
|
|
}
|
|
|
|
hsp->shared_irq = i;
|
|
|
|
/* disable all interrupts */
|
|
tegra_hsp_writel(hsp, 0, HSP_INT_IE(hsp->shared_irq));
|
|
|
|
dev_dbg(hsp->dev, "interrupt requested: %u\n", irq);
|
|
|
|
break;
|
|
}
|
|
|
|
if (i == hsp->num_si) {
|
|
dev_err(hsp->dev, "failed to find available interrupt\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_hsp_probe(struct platform_device *pdev)
|
|
{
|
|
struct tegra_hsp *hsp;
|
|
struct resource *res;
|
|
unsigned int i;
|
|
u32 value;
|
|
int err;
|
|
|
|
hsp = devm_kzalloc(&pdev->dev, sizeof(*hsp), GFP_KERNEL);
|
|
if (!hsp)
|
|
return -ENOMEM;
|
|
|
|
hsp->dev = &pdev->dev;
|
|
hsp->soc = of_device_get_match_data(&pdev->dev);
|
|
INIT_LIST_HEAD(&hsp->doorbells);
|
|
spin_lock_init(&hsp->lock);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
hsp->regs = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(hsp->regs))
|
|
return PTR_ERR(hsp->regs);
|
|
|
|
value = tegra_hsp_readl(hsp, HSP_INT_DIMENSIONING);
|
|
hsp->num_sm = (value >> HSP_nSM_SHIFT) & HSP_nINT_MASK;
|
|
hsp->num_ss = (value >> HSP_nSS_SHIFT) & HSP_nINT_MASK;
|
|
hsp->num_as = (value >> HSP_nAS_SHIFT) & HSP_nINT_MASK;
|
|
hsp->num_db = (value >> HSP_nDB_SHIFT) & HSP_nINT_MASK;
|
|
hsp->num_si = (value >> HSP_nSI_SHIFT) & HSP_nINT_MASK;
|
|
|
|
err = platform_get_irq_byname_optional(pdev, "doorbell");
|
|
if (err >= 0)
|
|
hsp->doorbell_irq = err;
|
|
|
|
if (hsp->num_si > 0) {
|
|
unsigned int count = 0;
|
|
|
|
hsp->shared_irqs = devm_kcalloc(&pdev->dev, hsp->num_si,
|
|
sizeof(*hsp->shared_irqs),
|
|
GFP_KERNEL);
|
|
if (!hsp->shared_irqs)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < hsp->num_si; i++) {
|
|
char *name;
|
|
|
|
name = kasprintf(GFP_KERNEL, "shared%u", i);
|
|
if (!name)
|
|
return -ENOMEM;
|
|
|
|
err = platform_get_irq_byname_optional(pdev, name);
|
|
if (err >= 0) {
|
|
hsp->shared_irqs[i] = err;
|
|
count++;
|
|
}
|
|
|
|
kfree(name);
|
|
}
|
|
|
|
if (count == 0) {
|
|
devm_kfree(&pdev->dev, hsp->shared_irqs);
|
|
hsp->shared_irqs = NULL;
|
|
}
|
|
}
|
|
|
|
/* setup the doorbell controller */
|
|
hsp->mbox_db.of_xlate = tegra_hsp_db_xlate;
|
|
hsp->mbox_db.num_chans = 32;
|
|
hsp->mbox_db.dev = &pdev->dev;
|
|
hsp->mbox_db.ops = &tegra_hsp_db_ops;
|
|
|
|
hsp->mbox_db.chans = devm_kcalloc(&pdev->dev, hsp->mbox_db.num_chans,
|
|
sizeof(*hsp->mbox_db.chans),
|
|
GFP_KERNEL);
|
|
if (!hsp->mbox_db.chans)
|
|
return -ENOMEM;
|
|
|
|
if (hsp->doorbell_irq) {
|
|
err = tegra_hsp_add_doorbells(hsp);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to add doorbells: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
err = devm_mbox_controller_register(&pdev->dev, &hsp->mbox_db);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to register doorbell mailbox: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
/* setup the shared mailbox controller */
|
|
hsp->mbox_sm.of_xlate = tegra_hsp_sm_xlate;
|
|
hsp->mbox_sm.num_chans = hsp->num_sm;
|
|
hsp->mbox_sm.dev = &pdev->dev;
|
|
hsp->mbox_sm.ops = &tegra_hsp_sm_ops;
|
|
|
|
hsp->mbox_sm.chans = devm_kcalloc(&pdev->dev, hsp->mbox_sm.num_chans,
|
|
sizeof(*hsp->mbox_sm.chans),
|
|
GFP_KERNEL);
|
|
if (!hsp->mbox_sm.chans)
|
|
return -ENOMEM;
|
|
|
|
if (hsp->shared_irqs) {
|
|
err = tegra_hsp_add_mailboxes(hsp, &pdev->dev);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to add mailboxes: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
err = devm_mbox_controller_register(&pdev->dev, &hsp->mbox_sm);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to register shared mailbox: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, hsp);
|
|
|
|
if (hsp->doorbell_irq) {
|
|
err = devm_request_irq(&pdev->dev, hsp->doorbell_irq,
|
|
tegra_hsp_doorbell_irq, IRQF_NO_SUSPEND,
|
|
dev_name(&pdev->dev), hsp);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev,
|
|
"failed to request doorbell IRQ#%u: %d\n",
|
|
hsp->doorbell_irq, err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (hsp->shared_irqs) {
|
|
err = tegra_hsp_request_shared_irq(hsp);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
lockdep_register_key(&hsp->lock_key);
|
|
lockdep_set_class(&hsp->lock, &hsp->lock_key);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_hsp_remove(struct platform_device *pdev)
|
|
{
|
|
struct tegra_hsp *hsp = platform_get_drvdata(pdev);
|
|
|
|
lockdep_unregister_key(&hsp->lock_key);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused tegra_hsp_resume(struct device *dev)
|
|
{
|
|
struct tegra_hsp *hsp = dev_get_drvdata(dev);
|
|
unsigned int i;
|
|
struct tegra_hsp_doorbell *db;
|
|
|
|
list_for_each_entry(db, &hsp->doorbells, list) {
|
|
if (db && db->channel.chan)
|
|
tegra_hsp_doorbell_startup(db->channel.chan);
|
|
}
|
|
|
|
if (hsp->mailboxes) {
|
|
for (i = 0; i < hsp->num_sm; i++) {
|
|
struct tegra_hsp_mailbox *mb = &hsp->mailboxes[i];
|
|
|
|
if (mb->channel.chan->cl)
|
|
tegra_hsp_mailbox_startup(mb->channel.chan);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops tegra_hsp_pm_ops = {
|
|
.resume_noirq = tegra_hsp_resume,
|
|
};
|
|
|
|
static const struct tegra_hsp_db_map tegra186_hsp_db_map[] = {
|
|
{ "ccplex", TEGRA_HSP_DB_MASTER_CCPLEX, HSP_DB_CCPLEX, },
|
|
{ "bpmp", TEGRA_HSP_DB_MASTER_BPMP, HSP_DB_BPMP, },
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static const struct tegra_hsp_soc tegra186_hsp_soc = {
|
|
.map = tegra186_hsp_db_map,
|
|
.has_per_mb_ie = false,
|
|
};
|
|
|
|
static const struct tegra_hsp_soc tegra194_hsp_soc = {
|
|
.map = tegra186_hsp_db_map,
|
|
.has_per_mb_ie = true,
|
|
};
|
|
|
|
static const struct of_device_id tegra_hsp_match[] = {
|
|
{ .compatible = "nvidia,tegra186-hsp", .data = &tegra186_hsp_soc },
|
|
{ .compatible = "nvidia,tegra194-hsp", .data = &tegra194_hsp_soc },
|
|
{ }
|
|
};
|
|
|
|
static struct platform_driver tegra_hsp_driver = {
|
|
.driver = {
|
|
.name = "tegra-hsp",
|
|
.of_match_table = tegra_hsp_match,
|
|
.pm = &tegra_hsp_pm_ops,
|
|
},
|
|
.probe = tegra_hsp_probe,
|
|
.remove = tegra_hsp_remove,
|
|
};
|
|
|
|
static int __init tegra_hsp_init(void)
|
|
{
|
|
return platform_driver_register(&tegra_hsp_driver);
|
|
}
|
|
core_initcall(tegra_hsp_init);
|