| /* |
| * 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 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", |
| vmf->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, vmf->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, vmf->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 available, 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) { |
| inode_lock(inode); |
| err = spufs_mfc_flush(file, NULL); |
| inode_unlock(inode); |
| } |
| 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 }, |
| }; |