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- /*
- * 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/export.h>
- #include <linux/pagemap.h>
- #include <linux/poll.h>
- #include <linux/ptrace.h>
- #include <linux/seq_file.h>
- #include <linux/slab.h>
- #include <asm/io.h>
- #include <asm/time.h>
- #include <asm/spu.h>
- #include <asm/spu_info.h>
- #include <asm/uaccess.h>
- #include "spufs.h"
- #include "sputrace.h"
- #define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000)
- /* Simple attribute files */
- struct spufs_attr {
- int (*get)(void *, u64 *);
- int (*set)(void *, u64);
- char get_buf[24]; /* enough to store a u64 and "\n\0" */
- char set_buf[24];
- void *data;
- const char *fmt; /* format for read operation */
- struct mutex mutex; /* protects access to these buffers */
- };
- static int spufs_attr_open(struct inode *inode, struct file *file,
- int (*get)(void *, u64 *), int (*set)(void *, u64),
- const char *fmt)
- {
- struct spufs_attr *attr;
- attr = kmalloc(sizeof(*attr), GFP_KERNEL);
- if (!attr)
- return -ENOMEM;
- attr->get = get;
- attr->set = set;
- attr->data = inode->i_private;
- attr->fmt = fmt;
- mutex_init(&attr->mutex);
- file->private_data = attr;
- return nonseekable_open(inode, file);
- }
- static int spufs_attr_release(struct inode *inode, struct file *file)
- {
- kfree(file->private_data);
- return 0;
- }
- static ssize_t spufs_attr_read(struct file *file, char __user *buf,
- size_t len, loff_t *ppos)
- {
- struct spufs_attr *attr;
- size_t size;
- ssize_t ret;
- attr = file->private_data;
- if (!attr->get)
- return -EACCES;
- ret = mutex_lock_interruptible(&attr->mutex);
- if (ret)
- return ret;
- if (*ppos) { /* continued read */
- size = strlen(attr->get_buf);
- } else { /* first read */
- u64 val;
- ret = attr->get(attr->data, &val);
- if (ret)
- goto out;
- size = scnprintf(attr->get_buf, sizeof(attr->get_buf),
- attr->fmt, (unsigned long long)val);
- }
- ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);
- out:
- mutex_unlock(&attr->mutex);
- return ret;
- }
- static ssize_t spufs_attr_write(struct file *file, const char __user *buf,
- size_t len, loff_t *ppos)
- {
- struct spufs_attr *attr;
- u64 val;
- size_t size;
- ssize_t ret;
- attr = file->private_data;
- if (!attr->set)
- return -EACCES;
- ret = mutex_lock_interruptible(&attr->mutex);
- if (ret)
- return ret;
- ret = -EFAULT;
- size = min(sizeof(attr->set_buf) - 1, len);
- if (copy_from_user(attr->set_buf, buf, size))
- goto out;
- ret = len; /* claim we got the whole input */
- attr->set_buf[size] = '\0';
- val = simple_strtol(attr->set_buf, NULL, 0);
- attr->set(attr->data, val);
- out:
- mutex_unlock(&attr->mutex);
- return ret;
- }
- #define DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \
- static int __fops ## _open(struct inode *inode, struct file *file) \
- { \
- __simple_attr_check_format(__fmt, 0ull); \
- return spufs_attr_open(inode, file, __get, __set, __fmt); \
- } \
- static const struct file_operations __fops = { \
- .open = __fops ## _open, \
- .release = spufs_attr_release, \
- .read = spufs_attr_read, \
- .write = spufs_attr_write, \
- .llseek = generic_file_llseek, \
- };
- 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;
- mutex_lock(&ctx->mapping_lock);
- file->private_data = ctx;
- if (!i->i_openers++)
- ctx->local_store = inode->i_mapping;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- static int
- spufs_mem_release(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- if (!--i->i_openers)
- ctx->local_store = NULL;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- static ssize_t
- __spufs_mem_read(struct spu_context *ctx, char __user *buffer,
- size_t size, loff_t *pos)
- {
- char *local_store = ctx->ops->get_ls(ctx);
- return simple_read_from_buffer(buffer, size, pos, local_store,
- LS_SIZE);
- }
- 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;
- ssize_t ret;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ret = __spufs_mem_read(ctx, buffer, size, pos);
- spu_release(ctx);
- return ret;
- }
- static ssize_t
- spufs_mem_write(struct file *file, const char __user *buffer,
- size_t size, loff_t *ppos)
- {
- struct spu_context *ctx = file->private_data;
- char *local_store;
- loff_t pos = *ppos;
- int ret;
- if (pos > LS_SIZE)
- return -EFBIG;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- local_store = ctx->ops->get_ls(ctx);
- size = simple_write_to_buffer(local_store, LS_SIZE, ppos, buffer, size);
- spu_release(ctx);
- return size;
- }
- static int
- spufs_mem_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
- {
- struct spu_context *ctx = vma->vm_file->private_data;
- unsigned long address = (unsigned long)vmf->virtual_address;
- unsigned long pfn, offset;
- offset = vmf->pgoff << PAGE_SHIFT;
- if (offset >= LS_SIZE)
- return VM_FAULT_SIGBUS;
- pr_debug("spufs_mem_mmap_fault address=0x%lx, offset=0x%lx\n",
- address, offset);
- if (spu_acquire(ctx))
- return VM_FAULT_NOPAGE;
- if (ctx->state == SPU_STATE_SAVED) {
- vma->vm_page_prot = pgprot_cached(vma->vm_page_prot);
- pfn = vmalloc_to_pfn(ctx->csa.lscsa->ls + offset);
- } else {
- vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot);
- pfn = (ctx->spu->local_store_phys + offset) >> PAGE_SHIFT;
- }
- vm_insert_pfn(vma, address, pfn);
- spu_release(ctx);
- return VM_FAULT_NOPAGE;
- }
- static int spufs_mem_mmap_access(struct vm_area_struct *vma,
- unsigned long address,
- void *buf, int len, int write)
- {
- struct spu_context *ctx = vma->vm_file->private_data;
- unsigned long offset = address - vma->vm_start;
- char *local_store;
- if (write && !(vma->vm_flags & VM_WRITE))
- return -EACCES;
- if (spu_acquire(ctx))
- return -EINTR;
- if ((offset + len) > vma->vm_end)
- len = vma->vm_end - offset;
- local_store = ctx->ops->get_ls(ctx);
- if (write)
- memcpy_toio(local_store + offset, buf, len);
- else
- memcpy_fromio(buf, local_store + offset, len);
- spu_release(ctx);
- return len;
- }
- static const struct vm_operations_struct spufs_mem_mmap_vmops = {
- .fault = spufs_mem_mmap_fault,
- .access = spufs_mem_mmap_access,
- };
- static int spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
- {
- if (!(vma->vm_flags & VM_SHARED))
- return -EINVAL;
- vma->vm_flags |= VM_IO | VM_PFNMAP;
- vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot);
- vma->vm_ops = &spufs_mem_mmap_vmops;
- return 0;
- }
- static const struct file_operations spufs_mem_fops = {
- .open = spufs_mem_open,
- .release = spufs_mem_release,
- .read = spufs_mem_read,
- .write = spufs_mem_write,
- .llseek = generic_file_llseek,
- .mmap = spufs_mem_mmap,
- };
- static int spufs_ps_fault(struct vm_area_struct *vma,
- struct vm_fault *vmf,
- unsigned long ps_offs,
- unsigned long ps_size)
- {
- struct spu_context *ctx = vma->vm_file->private_data;
- unsigned long area, offset = vmf->pgoff << PAGE_SHIFT;
- int ret = 0;
- spu_context_nospu_trace(spufs_ps_fault__enter, ctx);
- if (offset >= ps_size)
- return VM_FAULT_SIGBUS;
- if (fatal_signal_pending(current))
- return VM_FAULT_SIGBUS;
- /*
- * Because we release the mmap_sem, the context may be destroyed while
- * we're in spu_wait. Grab an extra reference so it isn't destroyed
- * in the meantime.
- */
- get_spu_context(ctx);
- /*
- * We have to wait for context to be loaded before we have
- * pages to hand out to the user, but we don't want to wait
- * with the mmap_sem held.
- * It is possible to drop the mmap_sem here, but then we need
- * to return VM_FAULT_NOPAGE because the mappings may have
- * hanged.
- */
- if (spu_acquire(ctx))
- goto refault;
- if (ctx->state == SPU_STATE_SAVED) {
- up_read(¤t->mm->mmap_sem);
- spu_context_nospu_trace(spufs_ps_fault__sleep, ctx);
- ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
- spu_context_trace(spufs_ps_fault__wake, ctx, ctx->spu);
- down_read(¤t->mm->mmap_sem);
- } else {
- area = ctx->spu->problem_phys + ps_offs;
- vm_insert_pfn(vma, (unsigned long)vmf->virtual_address,
- (area + offset) >> PAGE_SHIFT);
- spu_context_trace(spufs_ps_fault__insert, ctx, ctx->spu);
- }
- if (!ret)
- spu_release(ctx);
- refault:
- put_spu_context(ctx);
- return VM_FAULT_NOPAGE;
- }
- #if SPUFS_MMAP_4K
- static int spufs_cntl_mmap_fault(struct vm_area_struct *vma,
- struct vm_fault *vmf)
- {
- return spufs_ps_fault(vma, vmf, 0x4000, SPUFS_CNTL_MAP_SIZE);
- }
- static const struct vm_operations_struct spufs_cntl_mmap_vmops = {
- .fault = spufs_cntl_mmap_fault,
- };
- /*
- * mmap support for problem state control area [0x4000 - 0x4fff].
- */
- static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
- {
- if (!(vma->vm_flags & VM_SHARED))
- return -EINVAL;
- vma->vm_flags |= VM_IO | VM_PFNMAP;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_ops = &spufs_cntl_mmap_vmops;
- return 0;
- }
- #else /* SPUFS_MMAP_4K */
- #define spufs_cntl_mmap NULL
- #endif /* !SPUFS_MMAP_4K */
- static int spufs_cntl_get(void *data, u64 *val)
- {
- struct spu_context *ctx = data;
- int ret;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- *val = ctx->ops->status_read(ctx);
- spu_release(ctx);
- return 0;
- }
- static int spufs_cntl_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- int ret;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ctx->ops->runcntl_write(ctx, val);
- spu_release(ctx);
- return 0;
- }
- 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;
- mutex_lock(&ctx->mapping_lock);
- file->private_data = ctx;
- if (!i->i_openers++)
- ctx->cntl = inode->i_mapping;
- mutex_unlock(&ctx->mapping_lock);
- return simple_attr_open(inode, file, spufs_cntl_get,
- spufs_cntl_set, "0x%08lx");
- }
- static int
- spufs_cntl_release(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- simple_attr_release(inode, file);
- mutex_lock(&ctx->mapping_lock);
- if (!--i->i_openers)
- ctx->cntl = NULL;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- static const struct file_operations spufs_cntl_fops = {
- .open = spufs_cntl_open,
- .release = spufs_cntl_release,
- .read = simple_attr_read,
- .write = simple_attr_write,
- .llseek = generic_file_llseek,
- .mmap = spufs_cntl_mmap,
- };
- 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 spu_context *ctx, char __user *buffer,
- size_t size, loff_t *pos)
- {
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- return simple_read_from_buffer(buffer, size, pos,
- lscsa->gprs, sizeof lscsa->gprs);
- }
- static ssize_t
- spufs_regs_read(struct file *file, char __user *buffer,
- size_t size, loff_t *pos)
- {
- int ret;
- struct spu_context *ctx = file->private_data;
- /* pre-check for file position: if we'd return EOF, there's no point
- * causing a deschedule */
- if (*pos >= sizeof(ctx->csa.lscsa->gprs))
- return 0;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- ret = __spufs_regs_read(ctx, buffer, size, pos);
- spu_release_saved(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;
- if (*pos >= sizeof(lscsa->gprs))
- return -EFBIG;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- size = simple_write_to_buffer(lscsa->gprs, sizeof(lscsa->gprs), pos,
- buffer, size);
- spu_release_saved(ctx);
- return size;
- }
- static const 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 spu_context *ctx, char __user * buffer,
- size_t size, loff_t * pos)
- {
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- return simple_read_from_buffer(buffer, size, pos,
- &lscsa->fpcr, sizeof(lscsa->fpcr));
- }
- static ssize_t
- spufs_fpcr_read(struct file *file, char __user * buffer,
- size_t size, loff_t * pos)
- {
- int ret;
- struct spu_context *ctx = file->private_data;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- ret = __spufs_fpcr_read(ctx, buffer, size, pos);
- spu_release_saved(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;
- if (*pos >= sizeof(lscsa->fpcr))
- return -EFBIG;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- size = simple_write_to_buffer(&lscsa->fpcr, sizeof(lscsa->fpcr), pos,
- buffer, size);
- spu_release_saved(ctx);
- return size;
- }
- static const 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);
- }
- /*
- * Read as many bytes from the mailbox as possible, until
- * one of the conditions becomes true:
- *
- * - no more data available in the mailbox
- * - end of the user provided buffer
- * - end of the mapped area
- */
- 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, __user *udata;
- ssize_t count;
- if (len < 4)
- return -EINVAL;
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
- udata = (void __user *)buf;
- count = spu_acquire(ctx);
- if (count)
- return count;
- for (count = 0; (count + 4) <= len; count += 4, udata++) {
- int ret;
- ret = ctx->ops->mbox_read(ctx, &mbox_data);
- if (ret == 0)
- break;
- /*
- * at the end of the mapped area, we can fault
- * but still need to return the data we have
- * read successfully so far.
- */
- ret = __put_user(mbox_data, udata);
- if (ret) {
- if (!count)
- count = -EFAULT;
- break;
- }
- }
- spu_release(ctx);
- if (!count)
- count = -EAGAIN;
- return count;
- }
- static const struct file_operations spufs_mbox_fops = {
- .open = spufs_pipe_open,
- .read = spufs_mbox_read,
- .llseek = no_llseek,
- };
- 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;
- ssize_t ret;
- u32 mbox_stat;
- if (len < 4)
- return -EINVAL;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- 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 const struct file_operations spufs_mbox_stat_fops = {
- .open = spufs_pipe_open,
- .read = spufs_mbox_stat_read,
- .llseek = no_llseek,
- };
- /* 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;
- if (!ctx)
- return;
- wake_up_all(&ctx->ibox_wq);
- kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
- }
- /*
- * Read as many bytes from the interrupt mailbox as possible, until
- * one of the conditions becomes true:
- *
- * - no more data available in the mailbox
- * - end of the user provided buffer
- * - end of the mapped area
- *
- * If the file is opened without O_NONBLOCK, we wait here until
- * any data is available, but return when we have been able to
- * read something.
- */
- 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, __user *udata;
- ssize_t count;
- if (len < 4)
- return -EINVAL;
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
- udata = (void __user *)buf;
- count = spu_acquire(ctx);
- if (count)
- goto out;
- /* wait only for the first element */
- count = 0;
- if (file->f_flags & O_NONBLOCK) {
- if (!spu_ibox_read(ctx, &ibox_data)) {
- count = -EAGAIN;
- goto out_unlock;
- }
- } else {
- count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
- if (count)
- goto out;
- }
- /* if we can't write at all, return -EFAULT */
- count = __put_user(ibox_data, udata);
- if (count)
- goto out_unlock;
- for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
- int ret;
- ret = ctx->ops->ibox_read(ctx, &ibox_data);
- if (ret == 0)
- break;
- /*
- * at the end of the mapped area, we can fault
- * but still need to return the data we have
- * read successfully so far.
- */
- ret = __put_user(ibox_data, udata);
- if (ret)
- break;
- }
- out_unlock:
- spu_release(ctx);
- out:
- return count;
- }
- 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);
- /*
- * For now keep this uninterruptible and also ignore the rule
- * that poll should not sleep. Will be fixed later.
- */
- mutex_lock(&ctx->state_mutex);
- mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
- spu_release(ctx);
- return mask;
- }
- static const struct file_operations spufs_ibox_fops = {
- .open = spufs_pipe_open,
- .read = spufs_ibox_read,
- .poll = spufs_ibox_poll,
- .fasync = spufs_ibox_fasync,
- .llseek = no_llseek,
- };
- 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;
- ssize_t ret;
- u32 ibox_stat;
- if (len < 4)
- return -EINVAL;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- 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 const struct file_operations spufs_ibox_stat_fops = {
- .open = spufs_pipe_open,
- .read = spufs_ibox_stat_read,
- .llseek = no_llseek,
- };
- /* 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;
- if (!ctx)
- return;
- wake_up_all(&ctx->wbox_wq);
- kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
- }
- /*
- * Write as many bytes to the interrupt mailbox as possible, until
- * one of the conditions becomes true:
- *
- * - the mailbox is full
- * - end of the user provided buffer
- * - end of the mapped area
- *
- * If the file is opened without O_NONBLOCK, we wait here until
- * space is availabyl, but return when we have been able to
- * write something.
- */
- 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, __user *udata;
- ssize_t count;
- if (len < 4)
- return -EINVAL;
- udata = (void __user *)buf;
- if (!access_ok(VERIFY_READ, buf, len))
- return -EFAULT;
- if (__get_user(wbox_data, udata))
- return -EFAULT;
- count = spu_acquire(ctx);
- if (count)
- goto out;
- /*
- * make sure we can at least write one element, by waiting
- * in case of !O_NONBLOCK
- */
- count = 0;
- if (file->f_flags & O_NONBLOCK) {
- if (!spu_wbox_write(ctx, wbox_data)) {
- count = -EAGAIN;
- goto out_unlock;
- }
- } else {
- count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
- if (count)
- goto out;
- }
- /* write as much as possible */
- for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
- int ret;
- ret = __get_user(wbox_data, udata);
- if (ret)
- break;
- ret = spu_wbox_write(ctx, wbox_data);
- if (ret == 0)
- break;
- }
- out_unlock:
- spu_release(ctx);
- out:
- return count;
- }
- 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);
- /*
- * For now keep this uninterruptible and also ignore the rule
- * that poll should not sleep. Will be fixed later.
- */
- mutex_lock(&ctx->state_mutex);
- mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
- spu_release(ctx);
- return mask;
- }
- static const struct file_operations spufs_wbox_fops = {
- .open = spufs_pipe_open,
- .write = spufs_wbox_write,
- .poll = spufs_wbox_poll,
- .fasync = spufs_wbox_fasync,
- .llseek = no_llseek,
- };
- 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;
- ssize_t ret;
- u32 wbox_stat;
- if (len < 4)
- return -EINVAL;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- 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 const struct file_operations spufs_wbox_stat_fops = {
- .open = spufs_pipe_open,
- .read = spufs_wbox_stat_read,
- .llseek = no_llseek,
- };
- 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;
- mutex_lock(&ctx->mapping_lock);
- file->private_data = ctx;
- if (!i->i_openers++)
- ctx->signal1 = inode->i_mapping;
- mutex_unlock(&ctx->mapping_lock);
- return nonseekable_open(inode, file);
- }
- static int
- spufs_signal1_release(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- if (!--i->i_openers)
- ctx->signal1 = NULL;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- static ssize_t __spufs_signal1_read(struct spu_context *ctx, char __user *buf,
- size_t len, loff_t *pos)
- {
- int ret = 0;
- u32 data;
- if (len < 4)
- return -EINVAL;
- if (ctx->csa.spu_chnlcnt_RW[3]) {
- data = ctx->csa.spu_chnldata_RW[3];
- ret = 4;
- }
- if (!ret)
- goto out;
- if (copy_to_user(buf, &data, 4))
- return -EFAULT;
- out:
- return ret;
- }
- static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
- {
- int ret;
- struct spu_context *ctx = file->private_data;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- ret = __spufs_signal1_read(ctx, buf, len, pos);
- spu_release_saved(ctx);
- return ret;
- }
- static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
- size_t len, loff_t *pos)
- {
- struct spu_context *ctx;
- ssize_t ret;
- u32 data;
- ctx = file->private_data;
- if (len < 4)
- return -EINVAL;
- if (copy_from_user(&data, buf, 4))
- return -EFAULT;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ctx->ops->signal1_write(ctx, data);
- spu_release(ctx);
- return 4;
- }
- static int
- spufs_signal1_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
- {
- #if SPUFS_SIGNAL_MAP_SIZE == 0x1000
- return spufs_ps_fault(vma, vmf, 0x14000, SPUFS_SIGNAL_MAP_SIZE);
- #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000
- /* For 64k pages, both signal1 and signal2 can be used to mmap the whole
- * signal 1 and 2 area
- */
- return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE);
- #else
- #error unsupported page size
- #endif
- }
- static const struct vm_operations_struct spufs_signal1_mmap_vmops = {
- .fault = spufs_signal1_mmap_fault,
- };
- 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_IO | VM_PFNMAP;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_ops = &spufs_signal1_mmap_vmops;
- return 0;
- }
- static const struct file_operations spufs_signal1_fops = {
- .open = spufs_signal1_open,
- .release = spufs_signal1_release,
- .read = spufs_signal1_read,
- .write = spufs_signal1_write,
- .mmap = spufs_signal1_mmap,
- .llseek = no_llseek,
- };
- static const struct file_operations spufs_signal1_nosched_fops = {
- .open = spufs_signal1_open,
- .release = spufs_signal1_release,
- .write = spufs_signal1_write,
- .mmap = spufs_signal1_mmap,
- .llseek = no_llseek,
- };
- 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;
- mutex_lock(&ctx->mapping_lock);
- file->private_data = ctx;
- if (!i->i_openers++)
- ctx->signal2 = inode->i_mapping;
- mutex_unlock(&ctx->mapping_lock);
- return nonseekable_open(inode, file);
- }
- static int
- spufs_signal2_release(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- if (!--i->i_openers)
- ctx->signal2 = NULL;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- static ssize_t __spufs_signal2_read(struct spu_context *ctx, char __user *buf,
- size_t len, loff_t *pos)
- {
- int ret = 0;
- u32 data;
- if (len < 4)
- return -EINVAL;
- if (ctx->csa.spu_chnlcnt_RW[4]) {
- data = ctx->csa.spu_chnldata_RW[4];
- ret = 4;
- }
- if (!ret)
- goto out;
- if (copy_to_user(buf, &data, 4))
- return -EFAULT;
- out:
- return ret;
- }
- static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
- {
- struct spu_context *ctx = file->private_data;
- int ret;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- ret = __spufs_signal2_read(ctx, buf, len, pos);
- spu_release_saved(ctx);
- return ret;
- }
- static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
- size_t len, loff_t *pos)
- {
- struct spu_context *ctx;
- ssize_t ret;
- u32 data;
- ctx = file->private_data;
- if (len < 4)
- return -EINVAL;
- if (copy_from_user(&data, buf, 4))
- return -EFAULT;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ctx->ops->signal2_write(ctx, data);
- spu_release(ctx);
- return 4;
- }
- #if SPUFS_MMAP_4K
- static int
- spufs_signal2_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
- {
- #if SPUFS_SIGNAL_MAP_SIZE == 0x1000
- return spufs_ps_fault(vma, vmf, 0x1c000, SPUFS_SIGNAL_MAP_SIZE);
- #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000
- /* For 64k pages, both signal1 and signal2 can be used to mmap the whole
- * signal 1 and 2 area
- */
- return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE);
- #else
- #error unsupported page size
- #endif
- }
- static const struct vm_operations_struct spufs_signal2_mmap_vmops = {
- .fault = spufs_signal2_mmap_fault,
- };
- static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
- {
- if (!(vma->vm_flags & VM_SHARED))
- return -EINVAL;
- vma->vm_flags |= VM_IO | VM_PFNMAP;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_ops = &spufs_signal2_mmap_vmops;
- return 0;
- }
- #else /* SPUFS_MMAP_4K */
- #define spufs_signal2_mmap NULL
- #endif /* !SPUFS_MMAP_4K */
- static const struct file_operations spufs_signal2_fops = {
- .open = spufs_signal2_open,
- .release = spufs_signal2_release,
- .read = spufs_signal2_read,
- .write = spufs_signal2_write,
- .mmap = spufs_signal2_mmap,
- .llseek = no_llseek,
- };
- static const struct file_operations spufs_signal2_nosched_fops = {
- .open = spufs_signal2_open,
- .release = spufs_signal2_release,
- .write = spufs_signal2_write,
- .mmap = spufs_signal2_mmap,
- .llseek = no_llseek,
- };
- /*
- * This is a wrapper around DEFINE_SIMPLE_ATTRIBUTE which does the
- * work of acquiring (or not) the SPU context before calling through
- * to the actual get routine. The set routine is called directly.
- */
- #define SPU_ATTR_NOACQUIRE 0
- #define SPU_ATTR_ACQUIRE 1
- #define SPU_ATTR_ACQUIRE_SAVED 2
- #define DEFINE_SPUFS_ATTRIBUTE(__name, __get, __set, __fmt, __acquire) \
- static int __##__get(void *data, u64 *val) \
- { \
- struct spu_context *ctx = data; \
- int ret = 0; \
- \
- if (__acquire == SPU_ATTR_ACQUIRE) { \
- ret = spu_acquire(ctx); \
- if (ret) \
- return ret; \
- *val = __get(ctx); \
- spu_release(ctx); \
- } else if (__acquire == SPU_ATTR_ACQUIRE_SAVED) { \
- ret = spu_acquire_saved(ctx); \
- if (ret) \
- return ret; \
- *val = __get(ctx); \
- spu_release_saved(ctx); \
- } else \
- *val = __get(ctx); \
- \
- return 0; \
- } \
- DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__name, __##__get, __set, __fmt);
- static int spufs_signal1_type_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- int ret;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ctx->ops->signal1_type_set(ctx, val);
- spu_release(ctx);
- return 0;
- }
- static u64 spufs_signal1_type_get(struct spu_context *ctx)
- {
- return ctx->ops->signal1_type_get(ctx);
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
- spufs_signal1_type_set, "%llu\n", SPU_ATTR_ACQUIRE);
- static int spufs_signal2_type_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- int ret;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ctx->ops->signal2_type_set(ctx, val);
- spu_release(ctx);
- return 0;
- }
- static u64 spufs_signal2_type_get(struct spu_context *ctx)
- {
- return ctx->ops->signal2_type_get(ctx);
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
- spufs_signal2_type_set, "%llu\n", SPU_ATTR_ACQUIRE);
- #if SPUFS_MMAP_4K
- static int
- spufs_mss_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
- {
- return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_MSS_MAP_SIZE);
- }
- static const struct vm_operations_struct spufs_mss_mmap_vmops = {
- .fault = spufs_mss_mmap_fault,
- };
- /*
- * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
- */
- static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
- {
- if (!(vma->vm_flags & VM_SHARED))
- return -EINVAL;
- vma->vm_flags |= VM_IO | VM_PFNMAP;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_ops = &spufs_mss_mmap_vmops;
- return 0;
- }
- #else /* SPUFS_MMAP_4K */
- #define spufs_mss_mmap NULL
- #endif /* !SPUFS_MMAP_4K */
- static int spufs_mss_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 = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- if (!i->i_openers++)
- ctx->mss = inode->i_mapping;
- mutex_unlock(&ctx->mapping_lock);
- return nonseekable_open(inode, file);
- }
- static int
- spufs_mss_release(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- if (!--i->i_openers)
- ctx->mss = NULL;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- static const struct file_operations spufs_mss_fops = {
- .open = spufs_mss_open,
- .release = spufs_mss_release,
- .mmap = spufs_mss_mmap,
- .llseek = no_llseek,
- };
- static int
- spufs_psmap_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
- {
- return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_PS_MAP_SIZE);
- }
- static const struct vm_operations_struct spufs_psmap_mmap_vmops = {
- .fault = spufs_psmap_mmap_fault,
- };
- /*
- * mmap support for full problem state area [0x00000 - 0x1ffff].
- */
- static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma)
- {
- if (!(vma->vm_flags & VM_SHARED))
- return -EINVAL;
- vma->vm_flags |= VM_IO | VM_PFNMAP;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_ops = &spufs_psmap_mmap_vmops;
- return 0;
- }
- static int spufs_psmap_open(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- file->private_data = i->i_ctx;
- if (!i->i_openers++)
- ctx->psmap = inode->i_mapping;
- mutex_unlock(&ctx->mapping_lock);
- return nonseekable_open(inode, file);
- }
- static int
- spufs_psmap_release(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- if (!--i->i_openers)
- ctx->psmap = NULL;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- static const struct file_operations spufs_psmap_fops = {
- .open = spufs_psmap_open,
- .release = spufs_psmap_release,
- .mmap = spufs_psmap_mmap,
- .llseek = no_llseek,
- };
- #if SPUFS_MMAP_4K
- static int
- spufs_mfc_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
- {
- return spufs_ps_fault(vma, vmf, 0x3000, SPUFS_MFC_MAP_SIZE);
- }
- static const struct vm_operations_struct spufs_mfc_mmap_vmops = {
- .fault = spufs_mfc_mmap_fault,
- };
- /*
- * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
- */
- static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
- {
- if (!(vma->vm_flags & VM_SHARED))
- return -EINVAL;
- vma->vm_flags |= VM_IO | VM_PFNMAP;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- vma->vm_ops = &spufs_mfc_mmap_vmops;
- return 0;
- }
- #else /* SPUFS_MMAP_4K */
- #define spufs_mfc_mmap NULL
- #endif /* !SPUFS_MMAP_4K */
- 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;
- mutex_lock(&ctx->mapping_lock);
- file->private_data = ctx;
- if (!i->i_openers++)
- ctx->mfc = inode->i_mapping;
- mutex_unlock(&ctx->mapping_lock);
- return nonseekable_open(inode, file);
- }
- static int
- spufs_mfc_release(struct inode *inode, struct file *file)
- {
- struct spufs_inode_info *i = SPUFS_I(inode);
- struct spu_context *ctx = i->i_ctx;
- mutex_lock(&ctx->mapping_lock);
- if (!--i->i_openers)
- ctx->mfc = NULL;
- mutex_unlock(&ctx->mapping_lock);
- return 0;
- }
- /* interrupt-level mfc callback function. */
- void spufs_mfc_callback(struct spu *spu)
- {
- struct spu_context *ctx = spu->ctx;
- if (!ctx)
- return;
- wake_up_all(&ctx->mfc_wq);
- pr_debug("%s %s\n", __func__, 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;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ret = -EINVAL;
- if (file->f_flags & O_NONBLOCK) {
- status = ctx->ops->read_mfc_tagstatus(ctx);
- if (!(status & ctx->tagwait))
- ret = -EAGAIN;
- else
- /* XXX(hch): shouldn't we clear ret here? */
- ctx->tagwait &= ~status;
- } else {
- ret = spufs_wait(ctx->mfc_wq,
- spufs_read_mfc_tagstatus(ctx, &status));
- if (ret)
- goto out;
- }
- spu_release(ctx);
- 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 %llx %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 %llx 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;
- ret = spu_acquire(ctx);
- if (ret)
- goto out;
- ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
- if (ret)
- goto out;
- 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 (ret)
- goto out;
- if (status)
- ret = status;
- }
- if (ret)
- goto out_unlock;
- ctx->tagwait |= 1 << cmd.tag;
- ret = size;
- out_unlock:
- spu_release(ctx);
- 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;
- poll_wait(file, &ctx->mfc_wq, wait);
- /*
- * For now keep this uninterruptible and also ignore the rule
- * that poll should not sleep. Will be fixed later.
- */
- mutex_lock(&ctx->state_mutex);
- 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);
- 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", __func__,
- free_elements, tagstatus, ctx->tagwait);
- return mask;
- }
- static int spufs_mfc_flush(struct file *file, fl_owner_t id)
- {
- struct spu_context *ctx = file->private_data;
- int ret;
- ret = spu_acquire(ctx);
- if (ret)
- goto out;
- #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);
- if (ret)
- goto out;
- #else
- ret = 0;
- #endif
- spu_release(ctx);
- out:
- return ret;
- }
- static int spufs_mfc_fsync(struct file *file, loff_t start, loff_t end, int datasync)
- {
- struct inode *inode = file_inode(file);
- int err = filemap_write_and_wait_range(inode->i_mapping, start, end);
- if (!err) {
- mutex_lock(&inode->i_mutex);
- err = spufs_mfc_flush(file, NULL);
- mutex_unlock(&inode->i_mutex);
- }
- return err;
- }
- 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 const struct file_operations spufs_mfc_fops = {
- .open = spufs_mfc_open,
- .release = spufs_mfc_release,
- .read = spufs_mfc_read,
- .write = spufs_mfc_write,
- .poll = spufs_mfc_poll,
- .flush = spufs_mfc_flush,
- .fsync = spufs_mfc_fsync,
- .fasync = spufs_mfc_fasync,
- .mmap = spufs_mfc_mmap,
- .llseek = no_llseek,
- };
- static int spufs_npc_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- int ret;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- ctx->ops->npc_write(ctx, val);
- spu_release(ctx);
- return 0;
- }
- static u64 spufs_npc_get(struct spu_context *ctx)
- {
- return ctx->ops->npc_read(ctx);
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set,
- "0x%llx\n", SPU_ATTR_ACQUIRE);
- static int spufs_decr_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- int ret;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- lscsa->decr.slot[0] = (u32) val;
- spu_release_saved(ctx);
- return 0;
- }
- static u64 spufs_decr_get(struct spu_context *ctx)
- {
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- return lscsa->decr.slot[0];
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
- "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED);
- static int spufs_decr_status_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- int ret;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- if (val)
- ctx->csa.priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
- else
- ctx->csa.priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING;
- spu_release_saved(ctx);
- return 0;
- }
- static u64 spufs_decr_status_get(struct spu_context *ctx)
- {
- if (ctx->csa.priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING)
- return SPU_DECR_STATUS_RUNNING;
- else
- return 0;
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
- spufs_decr_status_set, "0x%llx\n",
- SPU_ATTR_ACQUIRE_SAVED);
- static int spufs_event_mask_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- int ret;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- lscsa->event_mask.slot[0] = (u32) val;
- spu_release_saved(ctx);
- return 0;
- }
- static u64 spufs_event_mask_get(struct spu_context *ctx)
- {
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- return lscsa->event_mask.slot[0];
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
- spufs_event_mask_set, "0x%llx\n",
- SPU_ATTR_ACQUIRE_SAVED);
- static u64 spufs_event_status_get(struct spu_context *ctx)
- {
- struct spu_state *state = &ctx->csa;
- u64 stat;
- stat = state->spu_chnlcnt_RW[0];
- if (stat)
- return state->spu_chnldata_RW[0];
- return 0;
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_event_status_ops, spufs_event_status_get,
- NULL, "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)
- static int spufs_srr0_set(void *data, u64 val)
- {
- struct spu_context *ctx = data;
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- int ret;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- lscsa->srr0.slot[0] = (u32) val;
- spu_release_saved(ctx);
- return 0;
- }
- static u64 spufs_srr0_get(struct spu_context *ctx)
- {
- struct spu_lscsa *lscsa = ctx->csa.lscsa;
- return lscsa->srr0.slot[0];
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
- "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)
- static u64 spufs_id_get(struct spu_context *ctx)
- {
- u64 num;
- if (ctx->state == SPU_STATE_RUNNABLE)
- num = ctx->spu->number;
- else
- num = (unsigned int)-1;
- return num;
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n",
- SPU_ATTR_ACQUIRE)
- static u64 spufs_object_id_get(struct spu_context *ctx)
- {
- /* FIXME: Should there really be no locking here? */
- return ctx->object_id;
- }
- static int spufs_object_id_set(void *data, u64 id)
- {
- struct spu_context *ctx = data;
- ctx->object_id = id;
- return 0;
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get,
- spufs_object_id_set, "0x%llx\n", SPU_ATTR_NOACQUIRE);
- static u64 spufs_lslr_get(struct spu_context *ctx)
- {
- return ctx->csa.priv2.spu_lslr_RW;
- }
- DEFINE_SPUFS_ATTRIBUTE(spufs_lslr_ops, spufs_lslr_get, NULL, "0x%llx\n",
- SPU_ATTR_ACQUIRE_SAVED);
- static int spufs_info_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;
- return 0;
- }
- static int spufs_caps_show(struct seq_file *s, void *private)
- {
- struct spu_context *ctx = s->private;
- if (!(ctx->flags & SPU_CREATE_NOSCHED))
- seq_puts(s, "sched\n");
- if (!(ctx->flags & SPU_CREATE_ISOLATE))
- seq_puts(s, "step\n");
- return 0;
- }
- static int spufs_caps_open(struct inode *inode, struct file *file)
- {
- return single_open(file, spufs_caps_show, SPUFS_I(inode)->i_ctx);
- }
- static const struct file_operations spufs_caps_fops = {
- .open = spufs_caps_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static ssize_t __spufs_mbox_info_read(struct spu_context *ctx,
- char __user *buf, size_t len, loff_t *pos)
- {
- u32 data;
- /* EOF if there's no entry in the mbox */
- if (!(ctx->csa.prob.mb_stat_R & 0x0000ff))
- return 0;
- data = ctx->csa.prob.pu_mb_R;
- return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
- }
- static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
- {
- int ret;
- struct spu_context *ctx = file->private_data;
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- spin_lock(&ctx->csa.register_lock);
- ret = __spufs_mbox_info_read(ctx, buf, len, pos);
- spin_unlock(&ctx->csa.register_lock);
- spu_release_saved(ctx);
- return ret;
- }
- static const struct file_operations spufs_mbox_info_fops = {
- .open = spufs_info_open,
- .read = spufs_mbox_info_read,
- .llseek = generic_file_llseek,
- };
- static ssize_t __spufs_ibox_info_read(struct spu_context *ctx,
- char __user *buf, size_t len, loff_t *pos)
- {
- u32 data;
- /* EOF if there's no entry in the ibox */
- if (!(ctx->csa.prob.mb_stat_R & 0xff0000))
- return 0;
- data = ctx->csa.priv2.puint_mb_R;
- return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
- }
- static ssize_t spufs_ibox_info_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
- {
- struct spu_context *ctx = file->private_data;
- int ret;
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- spin_lock(&ctx->csa.register_lock);
- ret = __spufs_ibox_info_read(ctx, buf, len, pos);
- spin_unlock(&ctx->csa.register_lock);
- spu_release_saved(ctx);
- return ret;
- }
- static const struct file_operations spufs_ibox_info_fops = {
- .open = spufs_info_open,
- .read = spufs_ibox_info_read,
- .llseek = generic_file_llseek,
- };
- static ssize_t __spufs_wbox_info_read(struct spu_context *ctx,
- char __user *buf, size_t len, loff_t *pos)
- {
- int i, cnt;
- u32 data[4];
- u32 wbox_stat;
- wbox_stat = ctx->csa.prob.mb_stat_R;
- cnt = 4 - ((wbox_stat & 0x00ff00) >> 8);
- for (i = 0; i < cnt; i++) {
- data[i] = ctx->csa.spu_mailbox_data[i];
- }
- return simple_read_from_buffer(buf, len, pos, &data,
- cnt * sizeof(u32));
- }
- static ssize_t spufs_wbox_info_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
- {
- struct spu_context *ctx = file->private_data;
- int ret;
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- spin_lock(&ctx->csa.register_lock);
- ret = __spufs_wbox_info_read(ctx, buf, len, pos);
- spin_unlock(&ctx->csa.register_lock);
- spu_release_saved(ctx);
- return ret;
- }
- static const struct file_operations spufs_wbox_info_fops = {
- .open = spufs_info_open,
- .read = spufs_wbox_info_read,
- .llseek = generic_file_llseek,
- };
- static ssize_t __spufs_dma_info_read(struct spu_context *ctx,
- char __user *buf, size_t len, loff_t *pos)
- {
- struct spu_dma_info info;
- struct mfc_cq_sr *qp, *spuqp;
- int i;
- info.dma_info_type = ctx->csa.priv2.spu_tag_status_query_RW;
- info.dma_info_mask = ctx->csa.lscsa->tag_mask.slot[0];
- info.dma_info_status = ctx->csa.spu_chnldata_RW[24];
- info.dma_info_stall_and_notify = ctx->csa.spu_chnldata_RW[25];
- info.dma_info_atomic_command_status = ctx->csa.spu_chnldata_RW[27];
- for (i = 0; i < 16; i++) {
- qp = &info.dma_info_command_data[i];
- spuqp = &ctx->csa.priv2.spuq[i];
- qp->mfc_cq_data0_RW = spuqp->mfc_cq_data0_RW;
- qp->mfc_cq_data1_RW = spuqp->mfc_cq_data1_RW;
- qp->mfc_cq_data2_RW = spuqp->mfc_cq_data2_RW;
- qp->mfc_cq_data3_RW = spuqp->mfc_cq_data3_RW;
- }
- return simple_read_from_buffer(buf, len, pos, &info,
- sizeof info);
- }
- static ssize_t spufs_dma_info_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
- {
- struct spu_context *ctx = file->private_data;
- int ret;
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- spin_lock(&ctx->csa.register_lock);
- ret = __spufs_dma_info_read(ctx, buf, len, pos);
- spin_unlock(&ctx->csa.register_lock);
- spu_release_saved(ctx);
- return ret;
- }
- static const struct file_operations spufs_dma_info_fops = {
- .open = spufs_info_open,
- .read = spufs_dma_info_read,
- .llseek = no_llseek,
- };
- static ssize_t __spufs_proxydma_info_read(struct spu_context *ctx,
- char __user *buf, size_t len, loff_t *pos)
- {
- struct spu_proxydma_info info;
- struct mfc_cq_sr *qp, *puqp;
- int ret = sizeof info;
- int i;
- if (len < ret)
- return -EINVAL;
- if (!access_ok(VERIFY_WRITE, buf, len))
- return -EFAULT;
- info.proxydma_info_type = ctx->csa.prob.dma_querytype_RW;
- info.proxydma_info_mask = ctx->csa.prob.dma_querymask_RW;
- info.proxydma_info_status = ctx->csa.prob.dma_tagstatus_R;
- for (i = 0; i < 8; i++) {
- qp = &info.proxydma_info_command_data[i];
- puqp = &ctx->csa.priv2.puq[i];
- qp->mfc_cq_data0_RW = puqp->mfc_cq_data0_RW;
- qp->mfc_cq_data1_RW = puqp->mfc_cq_data1_RW;
- qp->mfc_cq_data2_RW = puqp->mfc_cq_data2_RW;
- qp->mfc_cq_data3_RW = puqp->mfc_cq_data3_RW;
- }
- return simple_read_from_buffer(buf, len, pos, &info,
- sizeof info);
- }
- static ssize_t spufs_proxydma_info_read(struct file *file, char __user *buf,
- size_t len, loff_t *pos)
- {
- struct spu_context *ctx = file->private_data;
- int ret;
- ret = spu_acquire_saved(ctx);
- if (ret)
- return ret;
- spin_lock(&ctx->csa.register_lock);
- ret = __spufs_proxydma_info_read(ctx, buf, len, pos);
- spin_unlock(&ctx->csa.register_lock);
- spu_release_saved(ctx);
- return ret;
- }
- static const struct file_operations spufs_proxydma_info_fops = {
- .open = spufs_info_open,
- .read = spufs_proxydma_info_read,
- .llseek = no_llseek,
- };
- static int spufs_show_tid(struct seq_file *s, void *private)
- {
- struct spu_context *ctx = s->private;
- seq_printf(s, "%d\n", ctx->tid);
- return 0;
- }
- static int spufs_tid_open(struct inode *inode, struct file *file)
- {
- return single_open(file, spufs_show_tid, SPUFS_I(inode)->i_ctx);
- }
- static const struct file_operations spufs_tid_fops = {
- .open = spufs_tid_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static const char *ctx_state_names[] = {
- "user", "system", "iowait", "loaded"
- };
- static unsigned long long spufs_acct_time(struct spu_context *ctx,
- enum spu_utilization_state state)
- {
- unsigned long long time = ctx->stats.times[state];
- /*
- * In general, utilization statistics are updated by the controlling
- * thread as the spu context moves through various well defined
- * state transitions, but if the context is lazily loaded its
- * utilization statistics are not updated as the controlling thread
- * is not tightly coupled with the execution of the spu context. We
- * calculate and apply the time delta from the last recorded state
- * of the spu context.
- */
- if (ctx->spu && ctx->stats.util_state == state) {
- time += ktime_get_ns() - ctx->stats.tstamp;
- }
- return time / NSEC_PER_MSEC;
- }
- static unsigned long long spufs_slb_flts(struct spu_context *ctx)
- {
- unsigned long long slb_flts = ctx->stats.slb_flt;
- if (ctx->state == SPU_STATE_RUNNABLE) {
- slb_flts += (ctx->spu->stats.slb_flt -
- ctx->stats.slb_flt_base);
- }
- return slb_flts;
- }
- static unsigned long long spufs_class2_intrs(struct spu_context *ctx)
- {
- unsigned long long class2_intrs = ctx->stats.class2_intr;
- if (ctx->state == SPU_STATE_RUNNABLE) {
- class2_intrs += (ctx->spu->stats.class2_intr -
- ctx->stats.class2_intr_base);
- }
- return class2_intrs;
- }
- static int spufs_show_stat(struct seq_file *s, void *private)
- {
- struct spu_context *ctx = s->private;
- int ret;
- ret = spu_acquire(ctx);
- if (ret)
- return ret;
- seq_printf(s, "%s %llu %llu %llu %llu "
- "%llu %llu %llu %llu %llu %llu %llu %llu\n",
- ctx_state_names[ctx->stats.util_state],
- spufs_acct_time(ctx, SPU_UTIL_USER),
- spufs_acct_time(ctx, SPU_UTIL_SYSTEM),
- spufs_acct_time(ctx, SPU_UTIL_IOWAIT),
- spufs_acct_time(ctx, SPU_UTIL_IDLE_LOADED),
- ctx->stats.vol_ctx_switch,
- ctx->stats.invol_ctx_switch,
- spufs_slb_flts(ctx),
- ctx->stats.hash_flt,
- ctx->stats.min_flt,
- ctx->stats.maj_flt,
- spufs_class2_intrs(ctx),
- ctx->stats.libassist);
- spu_release(ctx);
- return 0;
- }
- static int spufs_stat_open(struct inode *inode, struct file *file)
- {
- return single_open(file, spufs_show_stat, SPUFS_I(inode)->i_ctx);
- }
- static const struct file_operations spufs_stat_fops = {
- .open = spufs_stat_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- static inline int spufs_switch_log_used(struct spu_context *ctx)
- {
- return (ctx->switch_log->head - ctx->switch_log->tail) %
- SWITCH_LOG_BUFSIZE;
- }
- static inline int spufs_switch_log_avail(struct spu_context *ctx)
- {
- return SWITCH_LOG_BUFSIZE - spufs_switch_log_used(ctx);
- }
- static int spufs_switch_log_open(struct inode *inode, struct file *file)
- {
- struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
- int rc;
- rc = spu_acquire(ctx);
- if (rc)
- return rc;
- if (ctx->switch_log) {
- rc = -EBUSY;
- goto out;
- }
- ctx->switch_log = kmalloc(sizeof(struct switch_log) +
- SWITCH_LOG_BUFSIZE * sizeof(struct switch_log_entry),
- GFP_KERNEL);
- if (!ctx->switch_log) {
- rc = -ENOMEM;
- goto out;
- }
- ctx->switch_log->head = ctx->switch_log->tail = 0;
- init_waitqueue_head(&ctx->switch_log->wait);
- rc = 0;
- out:
- spu_release(ctx);
- return rc;
- }
- static int spufs_switch_log_release(struct inode *inode, struct file *file)
- {
- struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
- int rc;
- rc = spu_acquire(ctx);
- if (rc)
- return rc;
- kfree(ctx->switch_log);
- ctx->switch_log = NULL;
- spu_release(ctx);
- return 0;
- }
- static int switch_log_sprint(struct spu_context *ctx, char *tbuf, int n)
- {
- struct switch_log_entry *p;
- p = ctx->switch_log->log + ctx->switch_log->tail % SWITCH_LOG_BUFSIZE;
- return snprintf(tbuf, n, "%u.%09u %d %u %u %llu\n",
- (unsigned int) p->tstamp.tv_sec,
- (unsigned int) p->tstamp.tv_nsec,
- p->spu_id,
- (unsigned int) p->type,
- (unsigned int) p->val,
- (unsigned long long) p->timebase);
- }
- static ssize_t spufs_switch_log_read(struct file *file, char __user *buf,
- size_t len, loff_t *ppos)
- {
- struct inode *inode = file_inode(file);
- struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
- int error = 0, cnt = 0;
- if (!buf)
- return -EINVAL;
- error = spu_acquire(ctx);
- if (error)
- return error;
- while (cnt < len) {
- char tbuf[128];
- int width;
- if (spufs_switch_log_used(ctx) == 0) {
- if (cnt > 0) {
- /* If there's data ready to go, we can
- * just return straight away */
- break;
- } else if (file->f_flags & O_NONBLOCK) {
- error = -EAGAIN;
- break;
- } else {
- /* spufs_wait will drop the mutex and
- * re-acquire, but since we're in read(), the
- * file cannot be _released (and so
- * ctx->switch_log is stable).
- */
- error = spufs_wait(ctx->switch_log->wait,
- spufs_switch_log_used(ctx) > 0);
- /* On error, spufs_wait returns without the
- * state mutex held */
- if (error)
- return error;
- /* We may have had entries read from underneath
- * us while we dropped the mutex in spufs_wait,
- * so re-check */
- if (spufs_switch_log_used(ctx) == 0)
- continue;
- }
- }
- width = switch_log_sprint(ctx, tbuf, sizeof(tbuf));
- if (width < len)
- ctx->switch_log->tail =
- (ctx->switch_log->tail + 1) %
- SWITCH_LOG_BUFSIZE;
- else
- /* If the record is greater than space available return
- * partial buffer (so far) */
- break;
- error = copy_to_user(buf + cnt, tbuf, width);
- if (error)
- break;
- cnt += width;
- }
- spu_release(ctx);
- return cnt == 0 ? error : cnt;
- }
- static unsigned int spufs_switch_log_poll(struct file *file, poll_table *wait)
- {
- struct inode *inode = file_inode(file);
- struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
- unsigned int mask = 0;
- int rc;
- poll_wait(file, &ctx->switch_log->wait, wait);
- rc = spu_acquire(ctx);
- if (rc)
- return rc;
- if (spufs_switch_log_used(ctx) > 0)
- mask |= POLLIN;
- spu_release(ctx);
- return mask;
- }
- static const struct file_operations spufs_switch_log_fops = {
- .open = spufs_switch_log_open,
- .read = spufs_switch_log_read,
- .poll = spufs_switch_log_poll,
- .release = spufs_switch_log_release,
- .llseek = no_llseek,
- };
- /**
- * Log a context switch event to a switch log reader.
- *
- * Must be called with ctx->state_mutex held.
- */
- void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
- u32 type, u32 val)
- {
- if (!ctx->switch_log)
- return;
- if (spufs_switch_log_avail(ctx) > 1) {
- struct switch_log_entry *p;
- p = ctx->switch_log->log + ctx->switch_log->head;
- ktime_get_ts(&p->tstamp);
- p->timebase = get_tb();
- p->spu_id = spu ? spu->number : -1;
- p->type = type;
- p->val = val;
- ctx->switch_log->head =
- (ctx->switch_log->head + 1) % SWITCH_LOG_BUFSIZE;
- }
- wake_up(&ctx->switch_log->wait);
- }
- static int spufs_show_ctx(struct seq_file *s, void *private)
- {
- struct spu_context *ctx = s->private;
- u64 mfc_control_RW;
- mutex_lock(&ctx->state_mutex);
- if (ctx->spu) {
- struct spu *spu = ctx->spu;
- struct spu_priv2 __iomem *priv2 = spu->priv2;
- spin_lock_irq(&spu->register_lock);
- mfc_control_RW = in_be64(&priv2->mfc_control_RW);
- spin_unlock_irq(&spu->register_lock);
- } else {
- struct spu_state *csa = &ctx->csa;
- mfc_control_RW = csa->priv2.mfc_control_RW;
- }
- seq_printf(s, "%c flgs(%lx) sflgs(%lx) pri(%d) ts(%d) spu(%02d)"
- " %c %llx %llx %llx %llx %x %x\n",
- ctx->state == SPU_STATE_SAVED ? 'S' : 'R',
- ctx->flags,
- ctx->sched_flags,
- ctx->prio,
- ctx->time_slice,
- ctx->spu ? ctx->spu->number : -1,
- !list_empty(&ctx->rq) ? 'q' : ' ',
- ctx->csa.class_0_pending,
- ctx->csa.class_0_dar,
- ctx->csa.class_1_dsisr,
- mfc_control_RW,
- ctx->ops->runcntl_read(ctx),
- ctx->ops->status_read(ctx));
- mutex_unlock(&ctx->state_mutex);
- return 0;
- }
- static int spufs_ctx_open(struct inode *inode, struct file *file)
- {
- return single_open(file, spufs_show_ctx, SPUFS_I(inode)->i_ctx);
- }
- static const struct file_operations spufs_ctx_fops = {
- .open = spufs_ctx_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- };
- const struct spufs_tree_descr spufs_dir_contents[] = {
- { "capabilities", &spufs_caps_fops, 0444, },
- { "mem", &spufs_mem_fops, 0666, LS_SIZE, },
- { "regs", &spufs_regs_fops, 0666, sizeof(struct spu_reg128[128]), },
- { "mbox", &spufs_mbox_fops, 0444, },
- { "ibox", &spufs_ibox_fops, 0444, },
- { "wbox", &spufs_wbox_fops, 0222, },
- { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), },
- { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), },
- { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), },
- { "signal1", &spufs_signal1_fops, 0666, },
- { "signal2", &spufs_signal2_fops, 0666, },
- { "signal1_type", &spufs_signal1_type, 0666, },
- { "signal2_type", &spufs_signal2_type, 0666, },
- { "cntl", &spufs_cntl_fops, 0666, },
- { "fpcr", &spufs_fpcr_fops, 0666, sizeof(struct spu_reg128), },
- { "lslr", &spufs_lslr_ops, 0444, },
- { "mfc", &spufs_mfc_fops, 0666, },
- { "mss", &spufs_mss_fops, 0666, },
- { "npc", &spufs_npc_ops, 0666, },
- { "srr0", &spufs_srr0_ops, 0666, },
- { "decr", &spufs_decr_ops, 0666, },
- { "decr_status", &spufs_decr_status_ops, 0666, },
- { "event_mask", &spufs_event_mask_ops, 0666, },
- { "event_status", &spufs_event_status_ops, 0444, },
- { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, },
- { "phys-id", &spufs_id_ops, 0666, },
- { "object-id", &spufs_object_id_ops, 0666, },
- { "mbox_info", &spufs_mbox_info_fops, 0444, sizeof(u32), },
- { "ibox_info", &spufs_ibox_info_fops, 0444, sizeof(u32), },
- { "wbox_info", &spufs_wbox_info_fops, 0444, sizeof(u32), },
- { "dma_info", &spufs_dma_info_fops, 0444,
- sizeof(struct spu_dma_info), },
- { "proxydma_info", &spufs_proxydma_info_fops, 0444,
- sizeof(struct spu_proxydma_info)},
- { "tid", &spufs_tid_fops, 0444, },
- { "stat", &spufs_stat_fops, 0444, },
- { "switch_log", &spufs_switch_log_fops, 0444 },
- {},
- };
- const struct spufs_tree_descr spufs_dir_nosched_contents[] = {
- { "capabilities", &spufs_caps_fops, 0444, },
- { "mem", &spufs_mem_fops, 0666, LS_SIZE, },
- { "mbox", &spufs_mbox_fops, 0444, },
- { "ibox", &spufs_ibox_fops, 0444, },
- { "wbox", &spufs_wbox_fops, 0222, },
- { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), },
- { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), },
- { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), },
- { "signal1", &spufs_signal1_nosched_fops, 0222, },
- { "signal2", &spufs_signal2_nosched_fops, 0222, },
- { "signal1_type", &spufs_signal1_type, 0666, },
- { "signal2_type", &spufs_signal2_type, 0666, },
- { "mss", &spufs_mss_fops, 0666, },
- { "mfc", &spufs_mfc_fops, 0666, },
- { "cntl", &spufs_cntl_fops, 0666, },
- { "npc", &spufs_npc_ops, 0666, },
- { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, },
- { "phys-id", &spufs_id_ops, 0666, },
- { "object-id", &spufs_object_id_ops, 0666, },
- { "tid", &spufs_tid_fops, 0444, },
- { "stat", &spufs_stat_fops, 0444, },
- {},
- };
- const struct spufs_tree_descr spufs_dir_debug_contents[] = {
- { ".ctx", &spufs_ctx_fops, 0444, },
- {},
- };
- const struct spufs_coredump_reader spufs_coredump_read[] = {
- { "regs", __spufs_regs_read, NULL, sizeof(struct spu_reg128[128])},
- { "fpcr", __spufs_fpcr_read, NULL, sizeof(struct spu_reg128) },
- { "lslr", NULL, spufs_lslr_get, 19 },
- { "decr", NULL, spufs_decr_get, 19 },
- { "decr_status", NULL, spufs_decr_status_get, 19 },
- { "mem", __spufs_mem_read, NULL, LS_SIZE, },
- { "signal1", __spufs_signal1_read, NULL, sizeof(u32) },
- { "signal1_type", NULL, spufs_signal1_type_get, 19 },
- { "signal2", __spufs_signal2_read, NULL, sizeof(u32) },
- { "signal2_type", NULL, spufs_signal2_type_get, 19 },
- { "event_mask", NULL, spufs_event_mask_get, 19 },
- { "event_status", NULL, spufs_event_status_get, 19 },
- { "mbox_info", __spufs_mbox_info_read, NULL, sizeof(u32) },
- { "ibox_info", __spufs_ibox_info_read, NULL, sizeof(u32) },
- { "wbox_info", __spufs_wbox_info_read, NULL, 4 * sizeof(u32)},
- { "dma_info", __spufs_dma_info_read, NULL, sizeof(struct spu_dma_info)},
- { "proxydma_info", __spufs_proxydma_info_read,
- NULL, sizeof(struct spu_proxydma_info)},
- { "object-id", NULL, spufs_object_id_get, 19 },
- { "npc", NULL, spufs_npc_get, 19 },
- { NULL },
- };
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