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-rw-r--r--arch/powerpc/platforms/cell/spufs/file.c596
1 files changed, 596 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
new file mode 100644
index 00000000000..c1e64331049
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -0,0 +1,596 @@
+/*
+ * SPU file system -- file contents
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.com>
+ *
+ * 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/fs.h>
+#include <linux/ioctl.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+
+#include <asm/io.h>
+#include <asm/semaphore.h>
+#include <asm/spu.h>
+#include <asm/uaccess.h>
+
+#include "spufs.h"
+
+static int
+spufs_mem_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ file->private_data = i->i_ctx;
+ return 0;
+}
+
+static ssize_t
+spufs_mem_read(struct file *file, char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ struct spu *spu;
+ struct spu_context *ctx;
+ int ret;
+
+ ctx = file->private_data;
+ spu = ctx->spu;
+
+ down_read(&ctx->backing_sema);
+ if (spu->number & 0/*1*/) {
+ ret = generic_file_read(file, buffer, size, pos);
+ goto out;
+ }
+
+ ret = simple_read_from_buffer(buffer, size, pos,
+ spu->local_store, LS_SIZE);
+out:
+ up_read(&ctx->backing_sema);
+ return ret;
+}
+
+static ssize_t
+spufs_mem_write(struct file *file, const char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu *spu = ctx->spu;
+
+ if (spu->number & 0) //1)
+ return generic_file_write(file, buffer, size, pos);
+
+ size = min_t(ssize_t, LS_SIZE - *pos, size);
+ if (size <= 0)
+ return -EFBIG;
+ *pos += size;
+ return copy_from_user(spu->local_store + *pos - size,
+ buffer, size) ? -EFAULT : size;
+}
+
+static int
+spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu *spu = ctx->spu;
+ unsigned long pfn;
+
+ if (spu->number & 0) //1)
+ return generic_file_mmap(file, vma);
+
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_page_prot = __pgprot(pgprot_val (vma->vm_page_prot)
+ | _PAGE_NO_CACHE);
+ pfn = spu->local_store_phys >> PAGE_SHIFT;
+ /*
+ * This will work for actual SPUs, but not for vmalloc memory:
+ */
+ if (remap_pfn_range(vma, vma->vm_start, pfn,
+ vma->vm_end-vma->vm_start, vma->vm_page_prot))
+ return -EAGAIN;
+ return 0;
+}
+
+static struct file_operations spufs_mem_fops = {
+ .open = spufs_mem_open,
+ .read = spufs_mem_read,
+ .write = spufs_mem_write,
+ .mmap = spufs_mem_mmap,
+ .llseek = generic_file_llseek,
+};
+
+/* generic open function for all pipe-like files */
+static int spufs_pipe_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ file->private_data = i->i_ctx;
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ u32 mbox_stat;
+ u32 mbox_data;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ mbox_stat = in_be32(&prob->mb_stat_R);
+ if (!(mbox_stat & 0x0000ff))
+ return -EAGAIN;
+
+ mbox_data = in_be32(&prob->pu_mb_R);
+
+ if (copy_to_user(buf, &mbox_data, sizeof mbox_data))
+ return -EFAULT;
+
+ return 4;
+}
+
+static struct file_operations spufs_mbox_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_mbox_read,
+};
+
+static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ u32 mbox_stat;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+ mbox_stat = in_be32(&ctx->spu->problem->mb_stat_R) & 0xff;
+
+ if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat))
+ return -EFAULT;
+
+ return 4;
+}
+
+static struct file_operations spufs_mbox_stat_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_mbox_stat_read,
+};
+
+/* low-level ibox access function */
+size_t spu_ibox_read(struct spu *spu, u32 *data)
+{
+ int ret;
+
+ spin_lock_irq(&spu->register_lock);
+
+ if (in_be32(&spu->problem->mb_stat_R) & 0xff0000) {
+ /* read the first available word */
+ *data = in_be64(&spu->priv2->puint_mb_R);
+ ret = 4;
+ } else {
+ /* make sure we get woken up by the interrupt */
+ out_be64(&spu->priv1->int_mask_class2_RW,
+ in_be64(&spu->priv1->int_mask_class2_RW) | 0x1);
+ ret = 0;
+ }
+
+ spin_unlock_irq(&spu->register_lock);
+ return ret;
+}
+EXPORT_SYMBOL(spu_ibox_read);
+
+static int spufs_ibox_fasync(int fd, struct file *file, int on)
+{
+ struct spu_context *ctx;
+ ctx = file->private_data;
+ return fasync_helper(fd, file, on, &ctx->spu->ibox_fasync);
+}
+
+static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ u32 ibox_data;
+ ssize_t ret;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+
+ ret = 0;
+ if (file->f_flags & O_NONBLOCK) {
+ if (!spu_ibox_read(ctx->spu, &ibox_data))
+ ret = -EAGAIN;
+ } else {
+ ret = wait_event_interruptible(ctx->spu->ibox_wq,
+ spu_ibox_read(ctx->spu, &ibox_data));
+ }
+
+ if (ret)
+ return ret;
+
+ ret = 4;
+ if (copy_to_user(buf, &ibox_data, sizeof ibox_data))
+ ret = -EFAULT;
+
+ return ret;
+}
+
+static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ u32 mbox_stat;
+ unsigned int mask;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ mbox_stat = in_be32(&prob->mb_stat_R);
+
+ poll_wait(file, &ctx->spu->ibox_wq, wait);
+
+ mask = 0;
+ if (mbox_stat & 0xff0000)
+ mask |= POLLIN | POLLRDNORM;
+
+ return mask;
+}
+
+static struct file_operations spufs_ibox_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_ibox_read,
+ .poll = spufs_ibox_poll,
+ .fasync = spufs_ibox_fasync,
+};
+
+static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ u32 ibox_stat;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+ ibox_stat = (in_be32(&ctx->spu->problem->mb_stat_R) >> 16) & 0xff;
+
+ if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat))
+ return -EFAULT;
+
+ return 4;
+}
+
+static struct file_operations spufs_ibox_stat_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_ibox_stat_read,
+};
+
+/* low-level mailbox write */
+size_t spu_wbox_write(struct spu *spu, u32 data)
+{
+ int ret;
+
+ spin_lock_irq(&spu->register_lock);
+
+ if (in_be32(&spu->problem->mb_stat_R) & 0x00ff00) {
+ /* we have space to write wbox_data to */
+ out_be32(&spu->problem->spu_mb_W, data);
+ ret = 4;
+ } else {
+ /* make sure we get woken up by the interrupt when space
+ becomes available */
+ out_be64(&spu->priv1->int_mask_class2_RW,
+ in_be64(&spu->priv1->int_mask_class2_RW) | 0x10);
+ ret = 0;
+ }
+
+ spin_unlock_irq(&spu->register_lock);
+ return ret;
+}
+EXPORT_SYMBOL(spu_wbox_write);
+
+static int spufs_wbox_fasync(int fd, struct file *file, int on)
+{
+ struct spu_context *ctx;
+ ctx = file->private_data;
+ return fasync_helper(fd, file, on, &ctx->spu->wbox_fasync);
+}
+
+static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ u32 wbox_data;
+ int ret;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+
+ if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
+ return -EFAULT;
+
+ ret = 0;
+ if (file->f_flags & O_NONBLOCK) {
+ if (!spu_wbox_write(ctx->spu, wbox_data))
+ ret = -EAGAIN;
+ } else {
+ ret = wait_event_interruptible(ctx->spu->wbox_wq,
+ spu_wbox_write(ctx->spu, wbox_data));
+ }
+
+ return ret ? ret : sizeof wbox_data;
+}
+
+static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ u32 mbox_stat;
+ unsigned int mask;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ mbox_stat = in_be32(&prob->mb_stat_R);
+
+ poll_wait(file, &ctx->spu->wbox_wq, wait);
+
+ mask = 0;
+ if (mbox_stat & 0x00ff00)
+ mask = POLLOUT | POLLWRNORM;
+
+ return mask;
+}
+
+static struct file_operations spufs_wbox_fops = {
+ .open = spufs_pipe_open,
+ .write = spufs_wbox_write,
+ .poll = spufs_wbox_poll,
+ .fasync = spufs_wbox_fasync,
+};
+
+static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ u32 wbox_stat;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+ wbox_stat = (in_be32(&ctx->spu->problem->mb_stat_R) >> 8) & 0xff;
+
+ if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat))
+ return -EFAULT;
+
+ return 4;
+}
+
+static struct file_operations spufs_wbox_stat_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_wbox_stat_read,
+};
+
+long spufs_run_spu(struct file *file, struct spu_context *ctx,
+ u32 *npc, u32 *status)
+{
+ struct spu_problem __iomem *prob;
+ int ret;
+
+ if (file->f_flags & O_NONBLOCK) {
+ ret = -EAGAIN;
+ if (!down_write_trylock(&ctx->backing_sema))
+ goto out;
+ } else {
+ down_write(&ctx->backing_sema);
+ }
+
+ prob = ctx->spu->problem;
+ out_be32(&prob->spu_npc_RW, *npc);
+
+ ret = spu_run(ctx->spu);
+
+ *status = in_be32(&prob->spu_status_R);
+ *npc = in_be32(&prob->spu_npc_RW);
+
+ up_write(&ctx->backing_sema);
+
+out:
+ return ret;
+}
+
+static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem *prob;
+ u32 data;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+
+ if (len < 4)
+ return -EINVAL;
+
+ data = in_be32(&prob->signal_notify1);
+ if (copy_to_user(buf, &data, 4))
+ return -EFAULT;
+
+ return 4;
+}
+
+static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem *prob;
+ u32 data;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+
+ if (len < 4)
+ return -EINVAL;
+
+ if (copy_from_user(&data, buf, 4))
+ return -EFAULT;
+
+ out_be32(&prob->signal_notify1, data);
+
+ return 4;
+}
+
+static struct file_operations spufs_signal1_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_signal1_read,
+ .write = spufs_signal1_write,
+};
+
+static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem *prob;
+ u32 data;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+
+ if (len < 4)
+ return -EINVAL;
+
+ data = in_be32(&prob->signal_notify2);
+ if (copy_to_user(buf, &data, 4))
+ return -EFAULT;
+
+ return 4;
+}
+
+static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem *prob;
+ u32 data;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+
+ if (len < 4)
+ return -EINVAL;
+
+ if (copy_from_user(&data, buf, 4))
+ return -EFAULT;
+
+ out_be32(&prob->signal_notify2, data);
+
+ return 4;
+}
+
+static struct file_operations spufs_signal2_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_signal2_read,
+ .write = spufs_signal2_write,
+};
+
+static void spufs_signal1_type_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ struct spu_priv2 *priv2 = ctx->spu->priv2;
+ u64 tmp;
+
+ spin_lock_irq(&ctx->spu->register_lock);
+ tmp = in_be64(&priv2->spu_cfg_RW);
+ if (val)
+ tmp |= 1;
+ else
+ tmp &= ~1;
+ out_be64(&priv2->spu_cfg_RW, tmp);
+ spin_unlock_irq(&ctx->spu->register_lock);
+}
+
+static u64 spufs_signal1_type_get(void *data)
+{
+ struct spu_context *ctx = data;
+ return (in_be64(&ctx->spu->priv2->spu_cfg_RW) & 1) != 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
+ spufs_signal1_type_set, "%llu");
+
+static void spufs_signal2_type_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ struct spu_priv2 *priv2 = ctx->spu->priv2;
+ u64 tmp;
+
+ spin_lock_irq(&ctx->spu->register_lock);
+ tmp = in_be64(&priv2->spu_cfg_RW);
+ if (val)
+ tmp |= 2;
+ else
+ tmp &= ~2;
+ out_be64(&priv2->spu_cfg_RW, tmp);
+ spin_unlock_irq(&ctx->spu->register_lock);
+}
+
+static u64 spufs_signal2_type_get(void *data)
+{
+ struct spu_context *ctx = data;
+ return (in_be64(&ctx->spu->priv2->spu_cfg_RW) & 2) != 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
+ spufs_signal2_type_set, "%llu");
+
+static void spufs_npc_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ out_be32(&ctx->spu->problem->spu_npc_RW, val);
+}
+
+static u64 spufs_npc_get(void *data)
+{
+ struct spu_context *ctx = data;
+ u64 ret;
+ ret = in_be32(&ctx->spu->problem->spu_npc_RW);
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n")
+
+struct tree_descr spufs_dir_contents[] = {
+ { "mem", &spufs_mem_fops, 0666, },
+ { "mbox", &spufs_mbox_fops, 0444, },
+ { "ibox", &spufs_ibox_fops, 0444, },
+ { "wbox", &spufs_wbox_fops, 0222, },
+ { "mbox_stat", &spufs_mbox_stat_fops, 0444, },
+ { "ibox_stat", &spufs_ibox_stat_fops, 0444, },
+ { "wbox_stat", &spufs_wbox_stat_fops, 0444, },
+ { "signal1", &spufs_signal1_fops, 0666, },
+ { "signal2", &spufs_signal2_fops, 0666, },
+ { "signal1_type", &spufs_signal1_type, 0666, },
+ { "signal2_type", &spufs_signal2_type, 0666, },
+ { "npc", &spufs_npc_ops, 0666, },
+ {},
+};