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-rw-r--r--arch/powerpc/platforms/cell/spufs/file.c2633
1 files changed, 2633 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
new file mode 100644
index 000000000..62d90a5e2
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -0,0 +1,2633 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SPU file system -- file contents
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.com>
+ */
+
+#undef DEBUG
+
+#include <linux/coredump.h>
+#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 <linux/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;
+}
+
+static ssize_t spufs_dump_emit(struct coredump_params *cprm, void *buf,
+ size_t size)
+{
+ if (!dump_emit(cprm, buf, size))
+ return -EIO;
+ return size;
+}
+
+#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_dump(struct spu_context *ctx, struct coredump_params *cprm)
+{
+ return spufs_dump_emit(cprm, ctx->ops->get_ls(ctx), 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 = simple_read_from_buffer(buffer, size, pos, ctx->ops->get_ls(ctx),
+ LS_SIZE);
+ spu_release(ctx);
+
+ return ret;
+}
+
+static ssize_t
+spufs_mem_write(struct file *file, const char __user *buffer,
+ size_t size, loff_t *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 vm_fault_t
+spufs_mem_mmap_fault(struct vm_fault *vmf)
+{
+ struct vm_area_struct *vma = vmf->vma;
+ struct spu_context *ctx = vma->vm_file->private_data;
+ unsigned long pfn, offset;
+ vm_fault_t ret;
+
+ 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;
+ }
+ ret = vmf_insert_pfn(vma, vmf->address, pfn);
+
+ spu_release(ctx);
+
+ return ret;
+}
+
+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 vm_fault_t spufs_ps_fault(struct vm_fault *vmf,
+ unsigned long ps_offs,
+ unsigned long ps_size)
+{
+ struct spu_context *ctx = vmf->vma->vm_file->private_data;
+ unsigned long area, offset = vmf->pgoff << PAGE_SHIFT;
+ int err = 0;
+ vm_fault_t ret = VM_FAULT_NOPAGE;
+
+ 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_lock, 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_lock held.
+ * It is possible to drop the mmap_lock 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) {
+ mmap_read_unlock(current->mm);
+ spu_context_nospu_trace(spufs_ps_fault__sleep, ctx);
+ err = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
+ spu_context_trace(spufs_ps_fault__wake, ctx, ctx->spu);
+ mmap_read_lock(current->mm);
+ } else {
+ area = ctx->spu->problem_phys + ps_offs;
+ ret = vmf_insert_pfn(vmf->vma, vmf->address,
+ (area + offset) >> PAGE_SHIFT);
+ spu_context_trace(spufs_ps_fault__insert, ctx, ctx->spu);
+ }
+
+ if (!err)
+ spu_release(ctx);
+
+refault:
+ put_spu_context(ctx);
+ return ret;
+}
+
+#if SPUFS_MMAP_4K
+static vm_fault_t spufs_cntl_mmap_fault(struct vm_fault *vmf)
+{
+ return spufs_ps_fault(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 = no_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_dump(struct spu_context *ctx, struct coredump_params *cprm)
+{
+ return spufs_dump_emit(cprm, ctx->csa.lscsa->gprs,
+ sizeof(ctx->csa.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 = simple_read_from_buffer(buffer, size, pos, ctx->csa.lscsa->gprs,
+ sizeof(ctx->csa.lscsa->gprs));
+ 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_dump(struct spu_context *ctx, struct coredump_params *cprm)
+{
+ return spufs_dump_emit(cprm, &ctx->csa.lscsa->fpcr,
+ sizeof(ctx->csa.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 = simple_read_from_buffer(buffer, size, pos, &ctx->csa.lscsa->fpcr,
+ sizeof(ctx->csa.lscsa->fpcr));
+ 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 stream_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 = (void __user *)buf;
+ ssize_t count;
+
+ if (len < 4)
+ return -EINVAL;
+
+ 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);
+}
+
+/* interrupt-level ibox callback function. */
+void spufs_ibox_callback(struct spu *spu)
+{
+ struct spu_context *ctx = spu->ctx;
+
+ if (ctx)
+ wake_up_all(&ctx->ibox_wq);
+}
+
+/*
+ * 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 = (void __user *)buf;
+ ssize_t count;
+
+ if (len < 4)
+ return -EINVAL;
+
+ 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 __poll_t spufs_ibox_poll(struct file *file, poll_table *wait)
+{
+ struct spu_context *ctx = file->private_data;
+ __poll_t 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, EPOLLIN | EPOLLRDNORM);
+ 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,
+ .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);
+}
+
+/* interrupt-level wbox callback function. */
+void spufs_wbox_callback(struct spu *spu)
+{
+ struct spu_context *ctx = spu->ctx;
+
+ if (ctx)
+ wake_up_all(&ctx->wbox_wq);
+}
+
+/*
+ * 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 = (void __user *)buf;
+ ssize_t count;
+
+ if (len < 4)
+ return -EINVAL;
+
+ 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 __poll_t spufs_wbox_poll(struct file *file, poll_table *wait)
+{
+ struct spu_context *ctx = file->private_data;
+ __poll_t 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, EPOLLOUT | EPOLLWRNORM);
+ 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,
+ .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_dump(struct spu_context *ctx,
+ struct coredump_params *cprm)
+{
+ if (!ctx->csa.spu_chnlcnt_RW[3])
+ return 0;
+ return spufs_dump_emit(cprm, &ctx->csa.spu_chnldata_RW[3],
+ sizeof(ctx->csa.spu_chnldata_RW[3]));
+}
+
+static ssize_t __spufs_signal1_read(struct spu_context *ctx, char __user *buf,
+ size_t len)
+{
+ if (len < sizeof(ctx->csa.spu_chnldata_RW[3]))
+ return -EINVAL;
+ if (!ctx->csa.spu_chnlcnt_RW[3])
+ return 0;
+ if (copy_to_user(buf, &ctx->csa.spu_chnldata_RW[3],
+ sizeof(ctx->csa.spu_chnldata_RW[3])))
+ return -EFAULT;
+ return sizeof(ctx->csa.spu_chnldata_RW[3]);
+}
+
+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);
+ 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 vm_fault_t
+spufs_signal1_mmap_fault(struct vm_fault *vmf)
+{
+#if SPUFS_SIGNAL_MAP_SIZE == 0x1000
+ return spufs_ps_fault(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(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_dump(struct spu_context *ctx,
+ struct coredump_params *cprm)
+{
+ if (!ctx->csa.spu_chnlcnt_RW[4])
+ return 0;
+ return spufs_dump_emit(cprm, &ctx->csa.spu_chnldata_RW[4],
+ sizeof(ctx->csa.spu_chnldata_RW[4]));
+}
+
+static ssize_t __spufs_signal2_read(struct spu_context *ctx, char __user *buf,
+ size_t len)
+{
+ if (len < sizeof(ctx->csa.spu_chnldata_RW[4]))
+ return -EINVAL;
+ if (!ctx->csa.spu_chnlcnt_RW[4])
+ return 0;
+ if (copy_to_user(buf, &ctx->csa.spu_chnldata_RW[4],
+ sizeof(ctx->csa.spu_chnldata_RW[4])))
+ return -EFAULT;
+ return sizeof(ctx->csa.spu_chnldata_RW[4]);
+}
+
+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);
+ 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 vm_fault_t
+spufs_signal2_mmap_fault(struct vm_fault *vmf)
+{
+#if SPUFS_SIGNAL_MAP_SIZE == 0x1000
+ return spufs_ps_fault(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(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 vm_fault_t
+spufs_mss_mmap_fault(struct vm_fault *vmf)
+{
+ return spufs_ps_fault(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 vm_fault_t
+spufs_psmap_mmap_fault(struct vm_fault *vmf)
+{
+ return spufs_ps_fault(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 vm_fault_t
+spufs_mfc_mmap_fault(struct vm_fault *vmf)
+{
+ return spufs_ps_fault(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)
+ wake_up_all(&ctx->mfc_wq);
+}
+
+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 __poll_t spufs_mfc_poll(struct file *file,poll_table *wait)
+{
+ struct spu_context *ctx = file->private_data;
+ u32 free_elements, tagstatus;
+ __poll_t 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 |= EPOLLOUT | EPOLLWRNORM;
+ if (tagstatus & ctx->tagwait)
+ mask |= EPOLLIN | EPOLLRDNORM;
+
+ 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 = file_write_and_wait_range(file, start, end);
+ if (!err) {
+ inode_lock(inode);
+ err = spufs_mfc_flush(file, NULL);
+ inode_unlock(inode);
+ }
+ return err;
+}
+
+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,
+ .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_dump(struct spu_context *ctx,
+ struct coredump_params *cprm)
+{
+ if (!(ctx->csa.prob.mb_stat_R & 0x0000ff))
+ return 0;
+ return spufs_dump_emit(cprm, &ctx->csa.prob.pu_mb_R,
+ sizeof(ctx->csa.prob.pu_mb_R));
+}
+
+static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ u32 stat, data;
+ int ret;
+
+ ret = spu_acquire_saved(ctx);
+ if (ret)
+ return ret;
+ spin_lock(&ctx->csa.register_lock);
+ stat = ctx->csa.prob.mb_stat_R;
+ data = ctx->csa.prob.pu_mb_R;
+ spin_unlock(&ctx->csa.register_lock);
+ spu_release_saved(ctx);
+
+ /* EOF if there's no entry in the mbox */
+ if (!(stat & 0x0000ff))
+ return 0;
+
+ return simple_read_from_buffer(buf, len, pos, &data, sizeof(data));
+}
+
+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_dump(struct spu_context *ctx,
+ struct coredump_params *cprm)
+{
+ if (!(ctx->csa.prob.mb_stat_R & 0xff0000))
+ return 0;
+ return spufs_dump_emit(cprm, &ctx->csa.priv2.puint_mb_R,
+ sizeof(ctx->csa.priv2.puint_mb_R));
+}
+
+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;
+ u32 stat, data;
+ int ret;
+
+ ret = spu_acquire_saved(ctx);
+ if (ret)
+ return ret;
+ spin_lock(&ctx->csa.register_lock);
+ stat = ctx->csa.prob.mb_stat_R;
+ data = ctx->csa.priv2.puint_mb_R;
+ spin_unlock(&ctx->csa.register_lock);
+ spu_release_saved(ctx);
+
+ /* EOF if there's no entry in the ibox */
+ if (!(stat & 0xff0000))
+ return 0;
+
+ return simple_read_from_buffer(buf, len, pos, &data, sizeof(data));
+}
+
+static const struct file_operations spufs_ibox_info_fops = {
+ .open = spufs_info_open,
+ .read = spufs_ibox_info_read,
+ .llseek = generic_file_llseek,
+};
+
+static size_t spufs_wbox_info_cnt(struct spu_context *ctx)
+{
+ return (4 - ((ctx->csa.prob.mb_stat_R & 0x00ff00) >> 8)) * sizeof(u32);
+}
+
+static ssize_t spufs_wbox_info_dump(struct spu_context *ctx,
+ struct coredump_params *cprm)
+{
+ return spufs_dump_emit(cprm, &ctx->csa.spu_mailbox_data,
+ spufs_wbox_info_cnt(ctx));
+}
+
+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;
+ u32 data[ARRAY_SIZE(ctx->csa.spu_mailbox_data)];
+ int ret, count;
+
+ ret = spu_acquire_saved(ctx);
+ if (ret)
+ return ret;
+ spin_lock(&ctx->csa.register_lock);
+ count = spufs_wbox_info_cnt(ctx);
+ memcpy(&data, &ctx->csa.spu_mailbox_data, sizeof(data));
+ spin_unlock(&ctx->csa.register_lock);
+ spu_release_saved(ctx);
+
+ return simple_read_from_buffer(buf, len, pos, &data,
+ count * sizeof(u32));
+}
+
+static const struct file_operations spufs_wbox_info_fops = {
+ .open = spufs_info_open,
+ .read = spufs_wbox_info_read,
+ .llseek = generic_file_llseek,
+};
+
+static void spufs_get_dma_info(struct spu_context *ctx,
+ struct spu_dma_info *info)
+{
+ 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++) {
+ struct mfc_cq_sr *qp = &info->dma_info_command_data[i];
+ struct mfc_cq_sr *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;
+ }
+}
+
+static ssize_t spufs_dma_info_dump(struct spu_context *ctx,
+ struct coredump_params *cprm)
+{
+ struct spu_dma_info info;
+
+ spufs_get_dma_info(ctx, &info);
+ return spufs_dump_emit(cprm, &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;
+ struct spu_dma_info info;
+ int ret;
+
+ ret = spu_acquire_saved(ctx);
+ if (ret)
+ return ret;
+ spin_lock(&ctx->csa.register_lock);
+ spufs_get_dma_info(ctx, &info);
+ spin_unlock(&ctx->csa.register_lock);
+ spu_release_saved(ctx);
+
+ return simple_read_from_buffer(buf, len, pos, &info,
+ sizeof(info));
+}
+
+static const struct file_operations spufs_dma_info_fops = {
+ .open = spufs_info_open,
+ .read = spufs_dma_info_read,
+ .llseek = no_llseek,
+};
+
+static void spufs_get_proxydma_info(struct spu_context *ctx,
+ struct spu_proxydma_info *info)
+{
+ int i;
+
+ 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++) {
+ struct mfc_cq_sr *qp = &info->proxydma_info_command_data[i];
+ struct mfc_cq_sr *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;
+ }
+}
+
+static ssize_t spufs_proxydma_info_dump(struct spu_context *ctx,
+ struct coredump_params *cprm)
+{
+ struct spu_proxydma_info info;
+
+ spufs_get_proxydma_info(ctx, &info);
+ return spufs_dump_emit(cprm, &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;
+ struct spu_proxydma_info info;
+ int ret;
+
+ if (len < sizeof(info))
+ return -EINVAL;
+
+ ret = spu_acquire_saved(ctx);
+ if (ret)
+ return ret;
+ spin_lock(&ctx->csa.register_lock);
+ spufs_get_proxydma_info(ctx, &info);
+ spin_unlock(&ctx->csa.register_lock);
+ spu_release_saved(ctx);
+
+ return simple_read_from_buffer(buf, len, pos, &info,
+ sizeof(info));
+}
+
+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(struct_size(ctx->switch_log, log,
+ SWITCH_LOG_BUFSIZE), 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, "%llu.%09u %d %u %u %llu\n",
+ (unsigned long long) 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 __poll_t 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;
+ __poll_t 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 |= EPOLLIN;
+
+ 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_ts64(&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_dump, NULL, sizeof(struct spu_reg128[128])},
+ { "fpcr", spufs_fpcr_dump, 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_dump, NULL, LS_SIZE, },
+ { "signal1", spufs_signal1_dump, NULL, sizeof(u32) },
+ { "signal1_type", NULL, spufs_signal1_type_get, 19 },
+ { "signal2", spufs_signal2_dump, 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_dump, NULL, sizeof(u32) },
+ { "ibox_info", spufs_ibox_info_dump, NULL, sizeof(u32) },
+ { "wbox_info", spufs_wbox_info_dump, NULL, 4 * sizeof(u32)},
+ { "dma_info", spufs_dma_info_dump, NULL, sizeof(struct spu_dma_info)},
+ { "proxydma_info", spufs_proxydma_info_dump,
+ NULL, sizeof(struct spu_proxydma_info)},
+ { "object-id", NULL, spufs_object_id_get, 19 },
+ { "npc", NULL, spufs_npc_get, 19 },
+ { NULL },
+};