--- /dev/null
+/*
+ * 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.
+ */
+
+#undef DEBUG
+
+#include <linux/fs.h>
+#include <linux/ioctl.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <linux/poll.h>
+#include <linux/ptrace.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);
+ struct spu_context *ctx = i->i_ctx;
+ file->private_data = ctx;
+ file->f_mapping = inode->i_mapping;
+ ctx->local_store = inode->i_mapping;
+ return 0;
+}
+
+static ssize_t
+spufs_mem_read(struct file *file, char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ char *local_store;
+ int ret;
+
+ spu_acquire(ctx);
+
+ local_store = ctx->ops->get_ls(ctx);
+ ret = simple_read_from_buffer(buffer, size, pos, local_store, LS_SIZE);
+
+ spu_release(ctx);
+ 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;
+ char *local_store;
+ int ret;
+
+ size = min_t(ssize_t, LS_SIZE - *pos, size);
+ if (size <= 0)
+ return -EFBIG;
+ *pos += size;
+
+ spu_acquire(ctx);
+
+ local_store = ctx->ops->get_ls(ctx);
+ ret = copy_from_user(local_store + *pos - size,
+ buffer, size) ? -EFAULT : size;
+
+ spu_release(ctx);
+ return ret;
+}
+
+#ifdef CONFIG_SPUFS_MMAP
+static struct page *
+spufs_mem_mmap_nopage(struct vm_area_struct *vma,
+ unsigned long address, int *type)
+{
+ struct page *page = NOPAGE_SIGBUS;
+
+ struct spu_context *ctx = vma->vm_file->private_data;
+ unsigned long offset = address - vma->vm_start;
+ offset += vma->vm_pgoff << PAGE_SHIFT;
+
+ spu_acquire(ctx);
+
+ if (ctx->state == SPU_STATE_SAVED)
+ page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
+ else
+ page = pfn_to_page((ctx->spu->local_store_phys + offset)
+ >> PAGE_SHIFT);
+
+ spu_release(ctx);
+
+ if (type)
+ *type = VM_FAULT_MINOR;
+
+ page_cache_get(page);
+ return page;
+}
+
+static struct vm_operations_struct spufs_mem_mmap_vmops = {
+ .nopage = spufs_mem_mmap_nopage,
+};
+
+static int
+spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ if (!(vma->vm_flags & VM_SHARED))
+ return -EINVAL;
+
+ /* FIXME: */
+ vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+ | _PAGE_NO_CACHE);
+
+ vma->vm_ops = &spufs_mem_mmap_vmops;
+ return 0;
+}
+#endif
+
+static struct file_operations spufs_mem_fops = {
+ .open = spufs_mem_open,
+ .read = spufs_mem_read,
+ .write = spufs_mem_write,
+ .llseek = generic_file_llseek,
+#ifdef CONFIG_SPUFS_MMAP
+ .mmap = spufs_mem_mmap,
+#endif
+};
+
+#ifdef CONFIG_SPUFS_MMAP
+static struct page *spufs_ps_nopage(struct vm_area_struct *vma,
+ unsigned long address,
+ int *type, unsigned long ps_offs)
+{
+ struct page *page = NOPAGE_SIGBUS;
+ int fault_type = VM_FAULT_SIGBUS;
+ struct spu_context *ctx = vma->vm_file->private_data;
+ unsigned long offset = address - vma->vm_start;
+ unsigned long area;
+ int ret;
+
+ offset += vma->vm_pgoff << PAGE_SHIFT;
+ if (offset >= 0x4000)
+ goto out;
+
+ ret = spu_acquire_runnable(ctx);
+ if (ret)
+ goto out;
+
+ area = ctx->spu->problem_phys + ps_offs;
+ page = pfn_to_page((area + offset) >> PAGE_SHIFT);
+ fault_type = VM_FAULT_MINOR;
+ page_cache_get(page);
+
+ spu_release(ctx);
+
+ out:
+ if (type)
+ *type = fault_type;
+
+ return page;
+}
+
+static struct page *spufs_cntl_mmap_nopage(struct vm_area_struct *vma,
+ unsigned long address, int *type)
+{
+ return spufs_ps_nopage(vma, address, type, 0x4000);
+}
+
+static struct vm_operations_struct spufs_cntl_mmap_vmops = {
+ .nopage = spufs_cntl_mmap_nopage,
+};
+
+/*
+ * mmap support for problem state control area [0x4000 - 0x4fff].
+ * Mapping this area requires that the application have CAP_SYS_RAWIO,
+ * as these registers require special care when read/writing.
+ */
+static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ if (!(vma->vm_flags & VM_SHARED))
+ return -EINVAL;
+
+ if (!capable(CAP_SYS_RAWIO))
+ return -EPERM;
+
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+ | _PAGE_NO_CACHE);
+
+ vma->vm_ops = &spufs_cntl_mmap_vmops;
+ return 0;
+}
+#endif
+
+static int spufs_cntl_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ struct spu_context *ctx = i->i_ctx;
+
+ file->private_data = ctx;
+ file->f_mapping = inode->i_mapping;
+ ctx->cntl = inode->i_mapping;
+ return 0;
+}
+
+static ssize_t
+spufs_cntl_read(struct file *file, char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ /* FIXME: read from spu status */
+ return -EINVAL;
+}
+
+static ssize_t
+spufs_cntl_write(struct file *file, const char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ /* FIXME: write to runctl bit */
+ return -EINVAL;
+}
+
+static struct file_operations spufs_cntl_fops = {
+ .open = spufs_cntl_open,
+ .read = spufs_cntl_read,
+ .write = spufs_cntl_write,
+#ifdef CONFIG_SPUFS_MMAP
+ .mmap = spufs_cntl_mmap,
+#endif
+};
+
+static int
+spufs_regs_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_regs_read(struct file *file, char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ int ret;
+
+ spu_acquire_saved(ctx);
+
+ ret = simple_read_from_buffer(buffer, size, pos,
+ lscsa->gprs, sizeof lscsa->gprs);
+
+ spu_release(ctx);
+ return ret;
+}
+
+static ssize_t
+spufs_regs_write(struct file *file, const char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ int ret;
+
+ size = min_t(ssize_t, sizeof lscsa->gprs - *pos, size);
+ if (size <= 0)
+ return -EFBIG;
+ *pos += size;
+
+ spu_acquire_saved(ctx);
+
+ ret = copy_from_user(lscsa->gprs + *pos - size,
+ buffer, size) ? -EFAULT : size;
+
+ spu_release(ctx);
+ return ret;
+}
+
+static struct file_operations spufs_regs_fops = {
+ .open = spufs_regs_open,
+ .read = spufs_regs_read,
+ .write = spufs_regs_write,
+ .llseek = generic_file_llseek,
+};
+
+static ssize_t
+spufs_fpcr_read(struct file *file, char __user * buffer,
+ size_t size, loff_t * pos)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ int ret;
+
+ spu_acquire_saved(ctx);
+
+ ret = simple_read_from_buffer(buffer, size, pos,
+ &lscsa->fpcr, sizeof(lscsa->fpcr));
+
+ spu_release(ctx);
+ return ret;
+}
+
+static ssize_t
+spufs_fpcr_write(struct file *file, const char __user * buffer,
+ size_t size, loff_t * pos)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ int ret;
+
+ size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size);
+ if (size <= 0)
+ return -EFBIG;
+ *pos += size;
+
+ spu_acquire_saved(ctx);
+
+ ret = copy_from_user((char *)&lscsa->fpcr + *pos - size,
+ buffer, size) ? -EFAULT : size;
+
+ spu_release(ctx);
+ return ret;
+}
+
+static struct file_operations spufs_fpcr_fops = {
+ .open = spufs_regs_open,
+ .read = spufs_fpcr_read,
+ .write = spufs_fpcr_write,
+ .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 = file->private_data;
+ u32 mbox_data;
+ int ret;
+
+ if (len < 4)
+ return -EINVAL;
+
+ spu_acquire(ctx);
+ ret = ctx->ops->mbox_read(ctx, &mbox_data);
+ spu_release(ctx);
+
+ if (!ret)
+ return -EAGAIN;
+
+ 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 = file->private_data;
+ u32 mbox_stat;
+
+ if (len < 4)
+ return -EINVAL;
+
+ spu_acquire(ctx);
+
+ mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff;
+
+ spu_release(ctx);
+
+ 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_context *ctx, u32 *data)
+{
+ return ctx->ops->ibox_read(ctx, data);
+}
+
+static int spufs_ibox_fasync(int fd, struct file *file, int on)
+{
+ struct spu_context *ctx = file->private_data;
+
+ return fasync_helper(fd, file, on, &ctx->ibox_fasync);
+}
+
+/* interrupt-level ibox callback function. */
+void spufs_ibox_callback(struct spu *spu)
+{
+ struct spu_context *ctx = spu->ctx;
+
+ wake_up_all(&ctx->ibox_wq);
+ kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
+}
+
+static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ u32 ibox_data;
+ ssize_t ret;
+
+ if (len < 4)
+ return -EINVAL;
+
+ spu_acquire(ctx);
+
+ ret = 0;
+ if (file->f_flags & O_NONBLOCK) {
+ if (!spu_ibox_read(ctx, &ibox_data))
+ ret = -EAGAIN;
+ } else {
+ ret = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
+ }
+
+ spu_release(ctx);
+
+ 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 = file->private_data;
+ unsigned int mask;
+
+ poll_wait(file, &ctx->ibox_wq, wait);
+
+ spu_acquire(ctx);
+ mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
+ spu_release(ctx);
+
+ 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 = file->private_data;
+ u32 ibox_stat;
+
+ if (len < 4)
+ return -EINVAL;
+
+ spu_acquire(ctx);
+ ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff;
+ spu_release(ctx);
+
+ 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_context *ctx, u32 data)
+{
+ return ctx->ops->wbox_write(ctx, data);
+}
+
+static int spufs_wbox_fasync(int fd, struct file *file, int on)
+{
+ struct spu_context *ctx = file->private_data;
+ int ret;
+
+ ret = fasync_helper(fd, file, on, &ctx->wbox_fasync);
+
+ return ret;
+}
+
+/* interrupt-level wbox callback function. */
+void spufs_wbox_callback(struct spu *spu)
+{
+ struct spu_context *ctx = spu->ctx;
+
+ wake_up_all(&ctx->wbox_wq);
+ kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
+}
+
+static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ u32 wbox_data;
+ int ret;
+
+ if (len < 4)
+ return -EINVAL;
+
+ if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
+ return -EFAULT;
+
+ spu_acquire(ctx);
+
+ ret = 0;
+ if (file->f_flags & O_NONBLOCK) {
+ if (!spu_wbox_write(ctx, wbox_data))
+ ret = -EAGAIN;
+ } else {
+ ret = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
+ }
+
+ spu_release(ctx);
+
+ return ret ? ret : sizeof wbox_data;
+}
+
+static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
+{
+ struct spu_context *ctx = file->private_data;
+ unsigned int mask;
+
+ poll_wait(file, &ctx->wbox_wq, wait);
+
+ spu_acquire(ctx);
+ mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
+ spu_release(ctx);
+
+ 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 = file->private_data;
+ u32 wbox_stat;
+
+ if (len < 4)
+ return -EINVAL;
+
+ spu_acquire(ctx);
+ wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff;
+ spu_release(ctx);
+
+ 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,
+};
+
+static int spufs_signal1_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ struct spu_context *ctx = i->i_ctx;
+ file->private_data = ctx;
+ file->f_mapping = inode->i_mapping;
+ ctx->signal1 = inode->i_mapping;
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ u32 data;
+
+ if (len < 4)
+ return -EINVAL;
+
+ spu_acquire(ctx);
+ data = ctx->ops->signal1_read(ctx);
+ spu_release(ctx);
+
+ 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;
+ u32 data;
+
+ ctx = file->private_data;
+
+ if (len < 4)
+ return -EINVAL;
+
+ if (copy_from_user(&data, buf, 4))
+ return -EFAULT;
+
+ spu_acquire(ctx);
+ ctx->ops->signal1_write(ctx, data);
+ spu_release(ctx);
+
+ return 4;
+}
+
+#ifdef CONFIG_SPUFS_MMAP
+static struct page *spufs_signal1_mmap_nopage(struct vm_area_struct *vma,
+ unsigned long address, int *type)
+{
+ return spufs_ps_nopage(vma, address, type, 0x14000);
+}
+
+static struct vm_operations_struct spufs_signal1_mmap_vmops = {
+ .nopage = spufs_signal1_mmap_nopage,
+};
+
+static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ if (!(vma->vm_flags & VM_SHARED))
+ return -EINVAL;
+
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+ | _PAGE_NO_CACHE);
+
+ vma->vm_ops = &spufs_signal1_mmap_vmops;
+ return 0;
+}
+#endif
+
+static struct file_operations spufs_signal1_fops = {
+ .open = spufs_signal1_open,
+ .read = spufs_signal1_read,
+ .write = spufs_signal1_write,
+#ifdef CONFIG_SPUFS_MMAP
+ .mmap = spufs_signal1_mmap,
+#endif
+};
+
+static int spufs_signal2_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ struct spu_context *ctx = i->i_ctx;
+ file->private_data = ctx;
+ file->f_mapping = inode->i_mapping;
+ ctx->signal2 = inode->i_mapping;
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ u32 data;
+
+ ctx = file->private_data;
+
+ if (len < 4)
+ return -EINVAL;
+
+ spu_acquire(ctx);
+ data = ctx->ops->signal2_read(ctx);
+ spu_release(ctx);
+
+ 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;
+ u32 data;
+
+ ctx = file->private_data;
+
+ if (len < 4)
+ return -EINVAL;
+
+ if (copy_from_user(&data, buf, 4))
+ return -EFAULT;
+
+ spu_acquire(ctx);
+ ctx->ops->signal2_write(ctx, data);
+ spu_release(ctx);
+
+ return 4;
+}
+
+#ifdef CONFIG_SPUFS_MMAP
+static struct page *spufs_signal2_mmap_nopage(struct vm_area_struct *vma,
+ unsigned long address, int *type)
+{
+ return spufs_ps_nopage(vma, address, type, 0x1c000);
+}
+
+static struct vm_operations_struct spufs_signal2_mmap_vmops = {
+ .nopage = spufs_signal2_mmap_nopage,
+};
+
+static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ if (!(vma->vm_flags & VM_SHARED))
+ return -EINVAL;
+
+ /* FIXME: */
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+ | _PAGE_NO_CACHE);
+
+ vma->vm_ops = &spufs_signal2_mmap_vmops;
+ return 0;
+}
+#endif
+
+static struct file_operations spufs_signal2_fops = {
+ .open = spufs_signal2_open,
+ .read = spufs_signal2_read,
+ .write = spufs_signal2_write,
+#ifdef CONFIG_SPUFS_MMAP
+ .mmap = spufs_signal2_mmap,
+#endif
+};
+
+static void spufs_signal1_type_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+
+ spu_acquire(ctx);
+ ctx->ops->signal1_type_set(ctx, val);
+ spu_release(ctx);
+}
+
+static u64 spufs_signal1_type_get(void *data)
+{
+ struct spu_context *ctx = data;
+ u64 ret;
+
+ spu_acquire(ctx);
+ ret = ctx->ops->signal1_type_get(ctx);
+ spu_release(ctx);
+
+ return ret;
+}
+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;
+
+ spu_acquire(ctx);
+ ctx->ops->signal2_type_set(ctx, val);
+ spu_release(ctx);
+}
+
+static u64 spufs_signal2_type_get(void *data)
+{
+ struct spu_context *ctx = data;
+ u64 ret;
+
+ spu_acquire(ctx);
+ ret = ctx->ops->signal2_type_get(ctx);
+ spu_release(ctx);
+
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
+ spufs_signal2_type_set, "%llu");
+
+#ifdef CONFIG_SPUFS_MMAP
+static struct page *spufs_mfc_mmap_nopage(struct vm_area_struct *vma,
+ unsigned long address, int *type)
+{
+ return spufs_ps_nopage(vma, address, type, 0x3000);
+}
+
+static struct vm_operations_struct spufs_mfc_mmap_vmops = {
+ .nopage = spufs_mfc_mmap_nopage,
+};
+
+/*
+ * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
+ * Mapping this area requires that the application have CAP_SYS_RAWIO,
+ * as these registers require special care when read/writing.
+ */
+static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ if (!(vma->vm_flags & VM_SHARED))
+ return -EINVAL;
+
+ if (!capable(CAP_SYS_RAWIO))
+ return -EPERM;
+
+ vma->vm_flags |= VM_RESERVED;
+ vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
+ | _PAGE_NO_CACHE);
+
+ vma->vm_ops = &spufs_mfc_mmap_vmops;
+ return 0;
+}
+#endif
+
+static int spufs_mfc_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ struct spu_context *ctx = i->i_ctx;
+
+ /* we don't want to deal with DMA into other processes */
+ if (ctx->owner != current->mm)
+ return -EINVAL;
+
+ if (atomic_read(&inode->i_count) != 1)
+ return -EBUSY;
+
+ file->private_data = ctx;
+ return nonseekable_open(inode, file);
+}
+
+/* interrupt-level mfc callback function. */
+void spufs_mfc_callback(struct spu *spu)
+{
+ struct spu_context *ctx = spu->ctx;
+
+ wake_up_all(&ctx->mfc_wq);
+
+ pr_debug("%s %s\n", __FUNCTION__, spu->name);
+ if (ctx->mfc_fasync) {
+ u32 free_elements, tagstatus;
+ unsigned int mask;
+
+ /* no need for spu_acquire in interrupt context */
+ free_elements = ctx->ops->get_mfc_free_elements(ctx);
+ tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
+
+ mask = 0;
+ if (free_elements & 0xffff)
+ mask |= POLLOUT;
+ if (tagstatus & ctx->tagwait)
+ mask |= POLLIN;
+
+ kill_fasync(&ctx->mfc_fasync, SIGIO, mask);
+ }
+}
+
+static int spufs_read_mfc_tagstatus(struct spu_context *ctx, u32 *status)
+{
+ /* See if there is one tag group is complete */
+ /* FIXME we need locking around tagwait */
+ *status = ctx->ops->read_mfc_tagstatus(ctx) & ctx->tagwait;
+ ctx->tagwait &= ~*status;
+ if (*status)
+ return 1;
+
+ /* enable interrupt waiting for any tag group,
+ may silently fail if interrupts are already enabled */
+ ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
+ return 0;
+}
+
+static ssize_t spufs_mfc_read(struct file *file, char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ int ret = -EINVAL;
+ u32 status;
+
+ if (size != 4)
+ goto out;
+
+ spu_acquire(ctx);
+ if (file->f_flags & O_NONBLOCK) {
+ status = ctx->ops->read_mfc_tagstatus(ctx);
+ if (!(status & ctx->tagwait))
+ ret = -EAGAIN;
+ else
+ ctx->tagwait &= ~status;
+ } else {
+ ret = spufs_wait(ctx->mfc_wq,
+ spufs_read_mfc_tagstatus(ctx, &status));
+ }
+ spu_release(ctx);
+
+ if (ret)
+ goto out;
+
+ ret = 4;
+ if (copy_to_user(buffer, &status, 4))
+ ret = -EFAULT;
+
+out:
+ return ret;
+}
+
+static int spufs_check_valid_dma(struct mfc_dma_command *cmd)
+{
+ pr_debug("queueing DMA %x %lx %x %x %x\n", cmd->lsa,
+ cmd->ea, cmd->size, cmd->tag, cmd->cmd);
+
+ switch (cmd->cmd) {
+ case MFC_PUT_CMD:
+ case MFC_PUTF_CMD:
+ case MFC_PUTB_CMD:
+ case MFC_GET_CMD:
+ case MFC_GETF_CMD:
+ case MFC_GETB_CMD:
+ break;
+ default:
+ pr_debug("invalid DMA opcode %x\n", cmd->cmd);
+ return -EIO;
+ }
+
+ if ((cmd->lsa & 0xf) != (cmd->ea &0xf)) {
+ pr_debug("invalid DMA alignment, ea %lx lsa %x\n",
+ cmd->ea, cmd->lsa);
+ return -EIO;
+ }
+
+ switch (cmd->size & 0xf) {
+ case 1:
+ break;
+ case 2:
+ if (cmd->lsa & 1)
+ goto error;
+ break;
+ case 4:
+ if (cmd->lsa & 3)
+ goto error;
+ break;
+ case 8:
+ if (cmd->lsa & 7)
+ goto error;
+ break;
+ case 0:
+ if (cmd->lsa & 15)
+ goto error;
+ break;
+ error:
+ default:
+ pr_debug("invalid DMA alignment %x for size %x\n",
+ cmd->lsa & 0xf, cmd->size);
+ return -EIO;
+ }
+
+ if (cmd->size > 16 * 1024) {
+ pr_debug("invalid DMA size %x\n", cmd->size);
+ return -EIO;
+ }
+
+ if (cmd->tag & 0xfff0) {
+ /* we reserve the higher tag numbers for kernel use */
+ pr_debug("invalid DMA tag\n");
+ return -EIO;
+ }
+
+ if (cmd->class) {
+ /* not supported in this version */
+ pr_debug("invalid DMA class\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int spu_send_mfc_command(struct spu_context *ctx,
+ struct mfc_dma_command cmd,
+ int *error)
+{
+ *error = ctx->ops->send_mfc_command(ctx, &cmd);
+ if (*error == -EAGAIN) {
+ /* wait for any tag group to complete
+ so we have space for the new command */
+ ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
+ /* try again, because the queue might be
+ empty again */
+ *error = ctx->ops->send_mfc_command(ctx, &cmd);
+ if (*error == -EAGAIN)
+ return 0;
+ }
+ return 1;
+}
+
+static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer,
+ size_t size, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ struct mfc_dma_command cmd;
+ int ret = -EINVAL;
+
+ if (size != sizeof cmd)
+ goto out;
+
+ ret = -EFAULT;
+ if (copy_from_user(&cmd, buffer, sizeof cmd))
+ goto out;
+
+ ret = spufs_check_valid_dma(&cmd);
+ if (ret)
+ goto out;
+
+ spu_acquire_runnable(ctx);
+ if (file->f_flags & O_NONBLOCK) {
+ ret = ctx->ops->send_mfc_command(ctx, &cmd);
+ } else {
+ int status;
+ ret = spufs_wait(ctx->mfc_wq,
+ spu_send_mfc_command(ctx, cmd, &status));
+ if (status)
+ ret = status;
+ }
+ spu_release(ctx);
+
+ if (ret)
+ goto out;
+
+ ctx->tagwait |= 1 << cmd.tag;
+
+out:
+ return ret;
+}
+
+static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait)
+{
+ struct spu_context *ctx = file->private_data;
+ u32 free_elements, tagstatus;
+ unsigned int mask;
+
+ spu_acquire(ctx);
+ ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2);
+ free_elements = ctx->ops->get_mfc_free_elements(ctx);
+ tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
+ spu_release(ctx);
+
+ poll_wait(file, &ctx->mfc_wq, wait);
+
+ mask = 0;
+ if (free_elements & 0xffff)
+ mask |= POLLOUT | POLLWRNORM;
+ if (tagstatus & ctx->tagwait)
+ mask |= POLLIN | POLLRDNORM;
+
+ pr_debug("%s: free %d tagstatus %d tagwait %d\n", __FUNCTION__,
+ free_elements, tagstatus, ctx->tagwait);
+
+ return mask;
+}
+
+static int spufs_mfc_flush(struct file *file)
+{
+ struct spu_context *ctx = file->private_data;
+ int ret;
+
+ spu_acquire(ctx);
+#if 0
+/* this currently hangs */
+ ret = spufs_wait(ctx->mfc_wq,
+ ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2));
+ if (ret)
+ goto out;
+ ret = spufs_wait(ctx->mfc_wq,
+ ctx->ops->read_mfc_tagstatus(ctx) == ctx->tagwait);
+out:
+#else
+ ret = 0;
+#endif
+ spu_release(ctx);
+
+ return ret;
+}
+
+static int spufs_mfc_fsync(struct file *file, struct dentry *dentry,
+ int datasync)
+{
+ return spufs_mfc_flush(file);
+}
+
+static int spufs_mfc_fasync(int fd, struct file *file, int on)
+{
+ struct spu_context *ctx = file->private_data;
+
+ return fasync_helper(fd, file, on, &ctx->mfc_fasync);
+}
+
+static struct file_operations spufs_mfc_fops = {
+ .open = spufs_mfc_open,
+ .read = spufs_mfc_read,
+ .write = spufs_mfc_write,
+ .poll = spufs_mfc_poll,
+ .flush = spufs_mfc_flush,
+ .fsync = spufs_mfc_fsync,
+ .fasync = spufs_mfc_fasync,
+#ifdef CONFIG_SPUFS_MMAP
+ .mmap = spufs_mfc_mmap,
+#endif
+};
+
+static void spufs_npc_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ spu_acquire(ctx);
+ ctx->ops->npc_write(ctx, val);
+ spu_release(ctx);
+}
+
+static u64 spufs_npc_get(void *data)
+{
+ struct spu_context *ctx = data;
+ u64 ret;
+ spu_acquire(ctx);
+ ret = ctx->ops->npc_read(ctx);
+ spu_release(ctx);
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set, "%llx\n")
+
+static void spufs_decr_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ spu_acquire_saved(ctx);
+ lscsa->decr.slot[0] = (u32) val;
+ spu_release(ctx);
+}
+
+static u64 spufs_decr_get(void *data)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ u64 ret;
+ spu_acquire_saved(ctx);
+ ret = lscsa->decr.slot[0];
+ spu_release(ctx);
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
+ "%llx\n")
+
+static void spufs_decr_status_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ spu_acquire_saved(ctx);
+ lscsa->decr_status.slot[0] = (u32) val;
+ spu_release(ctx);
+}
+
+static u64 spufs_decr_status_get(void *data)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ u64 ret;
+ spu_acquire_saved(ctx);
+ ret = lscsa->decr_status.slot[0];
+ spu_release(ctx);
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
+ spufs_decr_status_set, "%llx\n")
+
+static void spufs_spu_tag_mask_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ spu_acquire_saved(ctx);
+ lscsa->tag_mask.slot[0] = (u32) val;
+ spu_release(ctx);
+}
+
+static u64 spufs_spu_tag_mask_get(void *data)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ u64 ret;
+ spu_acquire_saved(ctx);
+ ret = lscsa->tag_mask.slot[0];
+ spu_release(ctx);
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_spu_tag_mask_ops, spufs_spu_tag_mask_get,
+ spufs_spu_tag_mask_set, "%llx\n")
+
+static void spufs_event_mask_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ spu_acquire_saved(ctx);
+ lscsa->event_mask.slot[0] = (u32) val;
+ spu_release(ctx);
+}
+
+static u64 spufs_event_mask_get(void *data)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ u64 ret;
+ spu_acquire_saved(ctx);
+ ret = lscsa->event_mask.slot[0];
+ spu_release(ctx);
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
+ spufs_event_mask_set, "%llx\n")
+
+static void spufs_srr0_set(void *data, u64 val)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ spu_acquire_saved(ctx);
+ lscsa->srr0.slot[0] = (u32) val;
+ spu_release(ctx);
+}
+
+static u64 spufs_srr0_get(void *data)
+{
+ struct spu_context *ctx = data;
+ struct spu_lscsa *lscsa = ctx->csa.lscsa;
+ u64 ret;
+ spu_acquire_saved(ctx);
+ ret = lscsa->srr0.slot[0];
+ spu_release(ctx);
+ return ret;
+}
+DEFINE_SIMPLE_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
+ "%llx\n")
+
+struct tree_descr spufs_dir_contents[] = {
+ { "mem", &spufs_mem_fops, 0666, },
+ { "regs", &spufs_regs_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, },
+ { "mfc", &spufs_mfc_fops, 0666, },
+ { "cntl", &spufs_cntl_fops, 0666, },
+ { "npc", &spufs_npc_ops, 0666, },
+ { "fpcr", &spufs_fpcr_fops, 0666, },
+ { "decr", &spufs_decr_ops, 0666, },
+ { "decr_status", &spufs_decr_status_ops, 0666, },
+ { "spu_tag_mask", &spufs_spu_tag_mask_ops, 0666, },
+ { "event_mask", &spufs_event_mask_ops, 0666, },
+ { "srr0", &spufs_srr0_ops, 0666, },
+ {},
+};
git://git.onelab.eu / linux-2.6.git / blobdiff