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|
/*
* drivers/video/tegra/host/dev.c
*
* Tegra Graphics Host Driver Entrypoint
*
* Copyright (c) 2010, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "dev.h"
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/fs.h>
#include <linux/cdev.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <linux/file.h>
#include <linux/clk.h>
#include <asm/io.h>
#include <mach/nvhost.h>
#include <mach/nvmap.h>
#define DRIVER_NAME "tegra_grhost"
#define IFACE_NAME "nvhost"
static int nvhost_major = NVHOST_MAJOR;
static int nvhost_minor = NVHOST_CHANNEL_BASE;
struct nvhost_channel_userctx {
struct nvhost_channel *ch;
struct nvhost_hwctx *hwctx;
u32 syncpt_id;
u32 syncpt_incrs;
u32 cmdbufs_pending;
u32 relocs_pending;
u32 waitchk_pending;
u32 waitchk_ref;
struct nvmap_handle_ref *gather_mem;
struct nvhost_op_pair *gathers;
int num_gathers;
int pinarray_size;
struct nvmap_pinarray_elem pinarray[NVHOST_MAX_HANDLES];
struct nvmap_handle *unpinarray[NVHOST_MAX_HANDLES];
struct nvmap_client *nvmap;
struct nvhost_waitchk waitchks[NVHOST_MAX_WAIT_CHECKS];
u32 num_waitchks;
u32 waitchk_mask;
};
struct nvhost_ctrl_userctx {
struct nvhost_master *dev;
u32 mod_locks[NV_HOST1X_NB_MLOCKS];
};
static int nvhost_channelrelease(struct inode *inode, struct file *filp)
{
struct nvhost_channel_userctx *priv = filp->private_data;
filp->private_data = NULL;
nvhost_putchannel(priv->ch, priv->hwctx);
if (priv->hwctx)
priv->ch->ctxhandler.put(priv->hwctx);
if (priv->gathers)
nvmap_munmap(priv->gather_mem, priv->gathers);
if (!IS_ERR_OR_NULL(priv->gather_mem))
nvmap_free(priv->ch->dev->nvmap, priv->gather_mem);
nvmap_client_put(priv->nvmap);
kfree(priv);
return 0;
}
static int nvhost_channelopen(struct inode *inode, struct file *filp)
{
struct nvhost_channel_userctx *priv;
struct nvhost_channel *ch;
size_t gather_size;
ch = container_of(inode->i_cdev, struct nvhost_channel, cdev);
ch = nvhost_getchannel(ch);
if (!ch)
return -ENOMEM;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
nvhost_putchannel(ch, NULL);
return -ENOMEM;
}
filp->private_data = priv;
priv->ch = ch;
gather_size = sizeof(struct nvhost_op_pair) * NVHOST_MAX_GATHERS;
priv->gather_mem = nvmap_alloc(ch->dev->nvmap, gather_size, 32,
NVMAP_HANDLE_CACHEABLE);
if (IS_ERR(priv->gather_mem))
goto fail;
if (ch->ctxhandler.alloc) {
priv->hwctx = ch->ctxhandler.alloc(ch);
if (!priv->hwctx)
goto fail;
}
priv->gathers = (struct nvhost_op_pair *)nvmap_mmap(priv->gather_mem);
return 0;
fail:
nvhost_channelrelease(inode, filp);
return -ENOMEM;
}
static void add_gather(struct nvhost_channel_userctx *ctx, int idx,
u32 mem_id, u32 words, u32 offset)
{
struct nvmap_pinarray_elem *pin;
pin = &ctx->pinarray[ctx->pinarray_size++];
pin->patch_mem = (u32)nvmap_ref_to_handle(ctx->gather_mem);
pin->patch_offset = (idx * sizeof(struct nvhost_op_pair)) +
offsetof(struct nvhost_op_pair, op2);
pin->pin_mem = mem_id;
pin->pin_offset = offset;
ctx->gathers[idx].op1 = nvhost_opcode_gather(0, words);
}
static void reset_submit(struct nvhost_channel_userctx *ctx)
{
ctx->cmdbufs_pending = 0;
ctx->relocs_pending = 0;
ctx->waitchk_pending = 0;
}
static ssize_t nvhost_channelwrite(struct file *filp, const char __user *buf,
size_t count, loff_t *offp)
{
struct nvhost_channel_userctx *priv = filp->private_data;
size_t remaining = count;
int err = 0;
while (remaining) {
size_t consumed;
if (!priv->relocs_pending && !priv->cmdbufs_pending && !priv->waitchk_pending) {
consumed = sizeof(struct nvhost_submit_hdr);
if (remaining < consumed)
break;
if (copy_from_user(&priv->syncpt_id, buf, consumed)) {
err = -EFAULT;
break;
}
if (!priv->cmdbufs_pending) {
err = -EFAULT;
break;
}
/* leave room for ctx switch */
priv->num_gathers = 2;
priv->pinarray_size = 0;
priv->waitchk_mask |= priv->waitchk_ref;
} else if (priv->cmdbufs_pending) {
struct nvhost_cmdbuf cmdbuf;
consumed = sizeof(cmdbuf);
if (remaining < consumed)
break;
if (copy_from_user(&cmdbuf, buf, consumed)) {
err = -EFAULT;
break;
}
add_gather(priv, priv->num_gathers++,
cmdbuf.mem, cmdbuf.words, cmdbuf.offset);
priv->cmdbufs_pending--;
} else if (priv->relocs_pending) {
int numrelocs = remaining / sizeof(struct nvhost_reloc);
if (!numrelocs)
break;
numrelocs = min_t(int, numrelocs, priv->relocs_pending);
consumed = numrelocs * sizeof(struct nvhost_reloc);
if (copy_from_user(&priv->pinarray[priv->pinarray_size],
buf, consumed)) {
err = -EFAULT;
break;
}
priv->pinarray_size += numrelocs;
priv->relocs_pending -= numrelocs;
} else if (priv->waitchk_pending) {
struct nvhost_waitchk *waitp;
consumed = sizeof(struct nvhost_waitchk);
if (remaining < consumed)
break;
waitp = &priv->waitchks[priv->num_waitchks];
if (copy_from_user(waitp, buf, consumed)) {
err = -EFAULT;
break;
}
priv->num_waitchks++;
priv->waitchk_pending--;
} else {
err = -EFAULT;
break;
}
remaining -= consumed;
buf += consumed;
}
if (err < 0) {
dev_err(&priv->ch->dev->pdev->dev, "channel write error\n");
reset_submit(priv);
return err;
}
return (count - remaining);
}
static int nvhost_ioctl_channel_flush(struct nvhost_channel_userctx *ctx,
struct nvhost_get_param_args *args)
{
struct nvhost_cpuinterrupt ctxsw;
int gather_idx = 2;
int num_intrs = 0;
u32 syncval;
int num_unpin;
int err;
if (ctx->relocs_pending || ctx->cmdbufs_pending || ctx->waitchk_pending) {
reset_submit(ctx);
dev_err(&ctx->ch->dev->pdev->dev, "channel submit out of sync\n");
return -EFAULT;
}
if (!ctx->nvmap) {
dev_err(&ctx->ch->dev->pdev->dev, "no nvmap context set\n");
return -EFAULT;
}
if (ctx->num_gathers <= 2)
return 0;
/* keep module powered */
nvhost_module_busy(&ctx->ch->mod);
/* pin mem handles and patch physical addresses */
num_unpin = nvmap_pin_array(ctx->nvmap,
nvmap_ref_to_handle(ctx->gather_mem),
ctx->pinarray, ctx->pinarray_size,
ctx->unpinarray);
if (num_unpin < 0) {
dev_warn(&ctx->ch->dev->pdev->dev, "nvmap_pin_array failed: "
"%d\n", num_unpin);
nvhost_module_idle(&ctx->ch->mod);
return num_unpin;
}
/* get submit lock */
err = mutex_lock_interruptible(&ctx->ch->submitlock);
if (err) {
nvmap_unpin_handles(ctx->nvmap, ctx->unpinarray, num_unpin);
nvhost_module_idle(&ctx->ch->mod);
return err;
}
/* remove stale waits */
if (ctx->num_waitchks) {
err = nvhost_syncpt_wait_check(ctx->nvmap,
&ctx->ch->dev->syncpt, ctx->waitchk_mask,
ctx->waitchks, ctx->num_waitchks);
if (err) {
dev_warn(&ctx->ch->dev->pdev->dev,
"nvhost_syncpt_wait_check failed: %d\n", err);
mutex_unlock(&ctx->ch->submitlock);
nvmap_unpin_handles(ctx->nvmap, ctx->unpinarray, num_unpin);
nvhost_module_idle(&ctx->ch->mod);
return err;
}
ctx->num_waitchks = 0;
ctx->waitchk_mask = 0;
}
/* context switch */
if (ctx->ch->cur_ctx != ctx->hwctx) {
struct nvhost_hwctx *hw = ctx->hwctx;
if (hw && hw->valid) {
gather_idx--;
ctx->gathers[gather_idx].op1 =
nvhost_opcode_gather(0, hw->restore_size);
ctx->gathers[gather_idx].op2 = hw->restore_phys;
ctx->syncpt_incrs += hw->restore_incrs;
}
hw = ctx->ch->cur_ctx;
if (hw) {
gather_idx--;
ctx->gathers[gather_idx].op1 =
nvhost_opcode_gather(0, hw->save_size);
ctx->gathers[gather_idx].op2 = hw->save_phys;
ctx->syncpt_incrs += hw->save_incrs;
num_intrs = 1;
ctxsw.syncpt_val = hw->save_incrs - 1;
ctxsw.intr_data = hw;
hw->valid = true;
ctx->ch->ctxhandler.get(hw);
}
ctx->ch->cur_ctx = ctx->hwctx;
}
/* add a setclass for modules that require it */
if (gather_idx == 2 && ctx->ch->desc->class) {
gather_idx--;
ctx->gathers[gather_idx].op1 =
nvhost_opcode_setclass(ctx->ch->desc->class, 0, 0);
ctx->gathers[gather_idx].op2 = NVHOST_OPCODE_NOOP;
}
/* get absolute sync value */
if (BIT(ctx->syncpt_id) & NVSYNCPTS_CLIENT_MANAGED)
syncval = nvhost_syncpt_set_max(&ctx->ch->dev->syncpt,
ctx->syncpt_id, ctx->syncpt_incrs);
else
syncval = nvhost_syncpt_incr_max(&ctx->ch->dev->syncpt,
ctx->syncpt_id, ctx->syncpt_incrs);
/* patch absolute syncpt value into interrupt triggers */
ctxsw.syncpt_val += syncval - ctx->syncpt_incrs;
nvhost_channel_submit(ctx->ch, ctx->nvmap, &ctx->gathers[gather_idx],
ctx->num_gathers - gather_idx, &ctxsw, num_intrs,
ctx->unpinarray, num_unpin,
ctx->syncpt_id, syncval);
/* schedule a submit complete interrupt */
nvhost_intr_add_action(&ctx->ch->dev->intr, ctx->syncpt_id, syncval,
NVHOST_INTR_ACTION_SUBMIT_COMPLETE, ctx->ch, NULL);
mutex_unlock(&ctx->ch->submitlock);
args->value = syncval;
return 0;
}
static long nvhost_channelctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct nvhost_channel_userctx *priv = filp->private_data;
u8 buf[NVHOST_IOCTL_CHANNEL_MAX_ARG_SIZE];
int err = 0;
if ((_IOC_TYPE(cmd) != NVHOST_IOCTL_MAGIC) ||
(_IOC_NR(cmd) == 0) ||
(_IOC_NR(cmd) > NVHOST_IOCTL_CHANNEL_LAST))
return -EFAULT;
BUG_ON(_IOC_SIZE(cmd) > NVHOST_IOCTL_CHANNEL_MAX_ARG_SIZE);
if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (copy_from_user(buf, (void __user *)arg, _IOC_SIZE(cmd)))
return -EFAULT;
}
switch (cmd) {
case NVHOST_IOCTL_CHANNEL_FLUSH:
err = nvhost_ioctl_channel_flush(priv, (void *)buf);
break;
case NVHOST_IOCTL_CHANNEL_GET_SYNCPOINTS:
/* host syncpt ID is used by the RM (and never be given out) */
BUG_ON(priv->ch->desc->syncpts & (1 << NVSYNCPT_GRAPHICS_HOST));
((struct nvhost_get_param_args *)buf)->value =
priv->ch->desc->syncpts;
break;
case NVHOST_IOCTL_CHANNEL_GET_WAITBASES:
((struct nvhost_get_param_args *)buf)->value =
priv->ch->desc->waitbases;
break;
case NVHOST_IOCTL_CHANNEL_GET_MODMUTEXES:
((struct nvhost_get_param_args *)buf)->value =
priv->ch->desc->modulemutexes;
break;
case NVHOST_IOCTL_CHANNEL_SET_NVMAP_FD:
{
int fd = (int)((struct nvhost_set_nvmap_fd_args *)buf)->fd;
struct nvmap_client *new_client = nvmap_client_get_file(fd);
if (IS_ERR(new_client)) {
err = PTR_ERR(new_client);
break;
}
if (priv->nvmap)
nvmap_client_put(priv->nvmap);
priv->nvmap = new_client;
break;
}
default:
err = -ENOTTY;
break;
}
if ((err == 0) && (_IOC_DIR(cmd) & _IOC_READ))
err = copy_to_user((void __user *)arg, buf, _IOC_SIZE(cmd));
return err;
}
static struct file_operations nvhost_channelops = {
.owner = THIS_MODULE,
.release = nvhost_channelrelease,
.open = nvhost_channelopen,
.write = nvhost_channelwrite,
.unlocked_ioctl = nvhost_channelctl
};
static int nvhost_ctrlrelease(struct inode *inode, struct file *filp)
{
struct nvhost_ctrl_userctx *priv = filp->private_data;
int i;
filp->private_data = NULL;
if (priv->mod_locks[0])
nvhost_module_idle(&priv->dev->mod);
for (i = 1; i < NV_HOST1X_NB_MLOCKS; i++)
if (priv->mod_locks[i])
nvhost_mutex_unlock(&priv->dev->cpuaccess, i);
kfree(priv);
return 0;
}
static int nvhost_ctrlopen(struct inode *inode, struct file *filp)
{
struct nvhost_master *host = container_of(inode->i_cdev, struct nvhost_master, cdev);
struct nvhost_ctrl_userctx *priv;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = host;
filp->private_data = priv;
return 0;
}
static int nvhost_ioctl_ctrl_syncpt_read(
struct nvhost_ctrl_userctx *ctx,
struct nvhost_ctrl_syncpt_read_args *args)
{
if (args->id >= NV_HOST1X_SYNCPT_NB_PTS)
return -EINVAL;
args->value = nvhost_syncpt_read(&ctx->dev->syncpt, args->id);
return 0;
}
static int nvhost_ioctl_ctrl_syncpt_incr(
struct nvhost_ctrl_userctx *ctx,
struct nvhost_ctrl_syncpt_incr_args *args)
{
if (args->id >= NV_HOST1X_SYNCPT_NB_PTS)
return -EINVAL;
nvhost_syncpt_incr(&ctx->dev->syncpt, args->id);
return 0;
}
static int nvhost_ioctl_ctrl_syncpt_wait(
struct nvhost_ctrl_userctx *ctx,
struct nvhost_ctrl_syncpt_wait_args *args)
{
u32 timeout;
if (args->id >= NV_HOST1X_SYNCPT_NB_PTS)
return -EINVAL;
if (args->timeout == NVHOST_NO_TIMEOUT)
timeout = MAX_SCHEDULE_TIMEOUT;
else
timeout = (u32)msecs_to_jiffies(args->timeout);
return nvhost_syncpt_wait_timeout(&ctx->dev->syncpt, args->id,
args->thresh, timeout);
}
static int nvhost_ioctl_ctrl_module_mutex(
struct nvhost_ctrl_userctx *ctx,
struct nvhost_ctrl_module_mutex_args *args)
{
int err = 0;
if (args->id >= NV_HOST1X_NB_MLOCKS ||
args->lock > 1)
return -EINVAL;
if (args->lock && !ctx->mod_locks[args->id]) {
if (args->id == 0)
nvhost_module_busy(&ctx->dev->mod);
else
err = nvhost_mutex_try_lock(&ctx->dev->cpuaccess, args->id);
if (!err)
ctx->mod_locks[args->id] = 1;
}
else if (!args->lock && ctx->mod_locks[args->id]) {
if (args->id == 0)
nvhost_module_idle(&ctx->dev->mod);
else
nvhost_mutex_unlock(&ctx->dev->cpuaccess, args->id);
ctx->mod_locks[args->id] = 0;
}
return err;
}
static int nvhost_ioctl_ctrl_module_regrdwr(
struct nvhost_ctrl_userctx *ctx,
struct nvhost_ctrl_module_regrdwr_args *args)
{
u32 num_offsets = args->num_offsets;
u32 *offsets = args->offsets;
void *values = args->values;
u32 vals[64];
if (!nvhost_access_module_regs(&ctx->dev->cpuaccess, args->id) ||
(num_offsets == 0))
return -EINVAL;
while (num_offsets--) {
u32 remaining = args->block_size;
u32 offs;
if (get_user(offs, offsets))
return -EFAULT;
offsets++;
while (remaining) {
u32 batch = min(remaining, 64*sizeof(u32));
if (args->write) {
if (copy_from_user(vals, values, batch))
return -EFAULT;
nvhost_write_module_regs(&ctx->dev->cpuaccess,
args->id, offs, batch, vals);
} else {
nvhost_read_module_regs(&ctx->dev->cpuaccess,
args->id, offs, batch, vals);
if (copy_to_user(values, vals, batch))
return -EFAULT;
}
remaining -= batch;
offs += batch;
values += batch;
}
}
return 0;
}
static long nvhost_ctrlctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct nvhost_ctrl_userctx *priv = filp->private_data;
u8 buf[NVHOST_IOCTL_CTRL_MAX_ARG_SIZE];
int err = 0;
if ((_IOC_TYPE(cmd) != NVHOST_IOCTL_MAGIC) ||
(_IOC_NR(cmd) == 0) ||
(_IOC_NR(cmd) > NVHOST_IOCTL_CTRL_LAST))
return -EFAULT;
BUG_ON(_IOC_SIZE(cmd) > NVHOST_IOCTL_CTRL_MAX_ARG_SIZE);
if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (copy_from_user(buf, (void __user *)arg, _IOC_SIZE(cmd)))
return -EFAULT;
}
switch (cmd) {
case NVHOST_IOCTL_CTRL_SYNCPT_READ:
err = nvhost_ioctl_ctrl_syncpt_read(priv, (void *)buf);
break;
case NVHOST_IOCTL_CTRL_SYNCPT_INCR:
err = nvhost_ioctl_ctrl_syncpt_incr(priv, (void *)buf);
break;
case NVHOST_IOCTL_CTRL_SYNCPT_WAIT:
err = nvhost_ioctl_ctrl_syncpt_wait(priv, (void *)buf);
break;
case NVHOST_IOCTL_CTRL_MODULE_MUTEX:
err = nvhost_ioctl_ctrl_module_mutex(priv, (void *)buf);
break;
case NVHOST_IOCTL_CTRL_MODULE_REGRDWR:
err = nvhost_ioctl_ctrl_module_regrdwr(priv, (void *)buf);
break;
default:
err = -ENOTTY;
break;
}
if ((err == 0) && (_IOC_DIR(cmd) & _IOC_READ))
err = copy_to_user((void __user *)arg, buf, _IOC_SIZE(cmd));
return err;
}
static struct file_operations nvhost_ctrlops = {
.owner = THIS_MODULE,
.release = nvhost_ctrlrelease,
.open = nvhost_ctrlopen,
.unlocked_ioctl = nvhost_ctrlctl
};
static void power_host(struct nvhost_module *mod, enum nvhost_power_action action)
{
struct nvhost_master *dev = container_of(mod, struct nvhost_master, mod);
if (action == NVHOST_POWER_ACTION_ON) {
nvhost_intr_configure(&dev->intr, clk_get_rate(mod->clk[0]));
}
else if (action == NVHOST_POWER_ACTION_OFF) {
int i;
for (i = 0; i < NVHOST_NUMCHANNELS; i++)
nvhost_channel_suspend(&dev->channels[i]);
nvhost_syncpt_save(&dev->syncpt);
}
}
static int __devinit nvhost_user_init(struct nvhost_master *host)
{
int i, err, devno;
host->nvhost_class = class_create(THIS_MODULE, IFACE_NAME);
if (IS_ERR(host->nvhost_class)) {
err = PTR_ERR(host->nvhost_class);
dev_err(&host->pdev->dev, "failed to create class\n");
goto fail;
}
if (nvhost_major) {
devno = MKDEV(nvhost_major, nvhost_minor);
err = register_chrdev_region(devno, NVHOST_NUMCHANNELS + 1, IFACE_NAME);
} else {
err = alloc_chrdev_region(&devno, nvhost_minor,
NVHOST_NUMCHANNELS + 1, IFACE_NAME);
nvhost_major = MAJOR(devno);
}
if (err < 0) {
dev_err(&host->pdev->dev, "failed to reserve chrdev region\n");
goto fail;
}
for (i = 0; i < NVHOST_NUMCHANNELS; i++) {
struct nvhost_channel *ch = &host->channels[i];
cdev_init(&ch->cdev, &nvhost_channelops);
ch->cdev.owner = THIS_MODULE;
devno = MKDEV(nvhost_major, nvhost_minor + i);
err = cdev_add(&ch->cdev, devno, 1);
if (err < 0) {
dev_err(&host->pdev->dev, "failed to add chan %i cdev\n", i);
goto fail;
}
ch->node = device_create(host->nvhost_class, NULL, devno, NULL,
IFACE_NAME "-%s", ch->desc->name);
if (IS_ERR(ch->node)) {
err = PTR_ERR(ch->node);
dev_err(&host->pdev->dev, "failed to create chan %i device\n", i);
goto fail;
}
}
cdev_init(&host->cdev, &nvhost_ctrlops);
host->cdev.owner = THIS_MODULE;
devno = MKDEV(nvhost_major, nvhost_minor + NVHOST_NUMCHANNELS);
err = cdev_add(&host->cdev, devno, 1);
if (err < 0)
goto fail;
host->ctrl = device_create(host->nvhost_class, NULL, devno, NULL,
IFACE_NAME "-ctrl");
if (IS_ERR(host->ctrl)) {
err = PTR_ERR(host->ctrl);
dev_err(&host->pdev->dev, "failed to create ctrl device\n");
goto fail;
}
return 0;
fail:
return err;
}
static int __devinit nvhost_probe(struct platform_device *pdev)
{
struct nvhost_master *host;
struct resource *regs, *intr0, *intr1;
int i, err;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
intr0 = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
intr1 = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
if (!regs || !intr0 || !intr1) {
dev_err(&pdev->dev, "missing required platform resources\n");
return -ENXIO;
}
host = kzalloc(sizeof(*host), GFP_KERNEL);
if (!host)
return -ENOMEM;
host->pdev = pdev;
host->nvmap = nvmap_create_client(nvmap_dev, "nvhost");
if (!host->nvmap) {
dev_err(&pdev->dev, "unable to create nvmap client\n");
err = -EIO;
goto fail;
}
host->reg_mem = request_mem_region(regs->start,
resource_size(regs), pdev->name);
if (!host->reg_mem) {
dev_err(&pdev->dev, "failed to get host register memory\n");
err = -ENXIO;
goto fail;
}
host->aperture = ioremap(regs->start, resource_size(regs));
if (!host->aperture) {
dev_err(&pdev->dev, "failed to remap host registers\n");
err = -ENXIO;
goto fail;
}
host->sync_aperture = host->aperture +
(NV_HOST1X_CHANNEL0_BASE +
HOST1X_CHANNEL_SYNC_REG_BASE);
for (i = 0; i < NVHOST_NUMCHANNELS; i++) {
struct nvhost_channel *ch = &host->channels[i];
err = nvhost_channel_init(ch, host, i);
if (err < 0) {
dev_err(&pdev->dev, "failed to init channel %d\n", i);
goto fail;
}
}
err = nvhost_cpuaccess_init(&host->cpuaccess, pdev);
if (err) goto fail;
err = nvhost_intr_init(&host->intr, intr1->start, intr0->start);
if (err) goto fail;
err = nvhost_user_init(host);
if (err) goto fail;
err = nvhost_module_init(&host->mod, "host1x", power_host, NULL, &pdev->dev);
if (err) goto fail;
platform_set_drvdata(pdev, host);
clk_enable(host->mod.clk[0]);
nvhost_syncpt_reset(&host->syncpt);
clk_disable(host->mod.clk[0]);
nvhost_bus_register(host);
nvhost_debug_init(host);
dev_info(&pdev->dev, "initialized\n");
return 0;
fail:
if (host->nvmap)
nvmap_client_put(host->nvmap);
/* TODO: [ahatala 2010-05-04] */
kfree(host);
return err;
}
static int __exit nvhost_remove(struct platform_device *pdev)
{
return 0;
}
static int nvhost_suspend(struct platform_device *pdev, pm_message_t state)
{
struct nvhost_master *host = platform_get_drvdata(pdev);
dev_info(&pdev->dev, "suspending\n");
nvhost_module_suspend(&host->mod);
clk_enable(host->mod.clk[0]);
nvhost_syncpt_save(&host->syncpt);
clk_disable(host->mod.clk[0]);
dev_info(&pdev->dev, "suspended\n");
return 0;
}
static int nvhost_resume(struct platform_device *pdev)
{
struct nvhost_master *host = platform_get_drvdata(pdev);
dev_info(&pdev->dev, "resuming\n");
clk_enable(host->mod.clk[0]);
nvhost_syncpt_reset(&host->syncpt);
clk_disable(host->mod.clk[0]);
dev_info(&pdev->dev, "resumed\n");
return 0;
}
static struct platform_driver nvhost_driver = {
.remove = __exit_p(nvhost_remove),
.suspend = nvhost_suspend,
.resume = nvhost_resume,
.driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME
}
};
static int __init nvhost_mod_init(void)
{
return platform_driver_probe(&nvhost_driver, nvhost_probe);
}
static void __exit nvhost_mod_exit(void)
{
platform_driver_unregister(&nvhost_driver);
}
module_init(nvhost_mod_init);
module_exit(nvhost_mod_exit);
MODULE_AUTHOR("NVIDIA");
MODULE_DESCRIPTION("Graphics host driver for Tegra products");
MODULE_VERSION("1.0");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform-nvhost");
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