diff options
Diffstat (limited to 'drivers/gator/gator_annotate.c')
| -rw-r--r-- | drivers/gator/gator_annotate.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/drivers/gator/gator_annotate.c b/drivers/gator/gator_annotate.c deleted file mode 100644 index b2288b3ad81..00000000000 --- a/drivers/gator/gator_annotate.c +++ /dev/null @@ -1,149 +0,0 @@ -/** - * Copyright (C) ARM Limited 2010-2012. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include <linux/slab.h> -#include <linux/fs.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <asm/uaccess.h> -#include <asm/current.h> -#include <linux/spinlock.h> - -static DEFINE_SPINLOCK(annotate_lock); -static bool collect_annotations = false; - -static int annotate_copy(struct file *file, char const __user *buf, size_t count) -{ - int cpu = 0; - int write = per_cpu(gator_buffer_write, cpu)[ANNOTATE_BUF]; - - if (file == NULL) { - // copy from kernel - memcpy(&per_cpu(gator_buffer, cpu)[ANNOTATE_BUF][write], buf, count); - } else { - // copy from user space - if (copy_from_user(&per_cpu(gator_buffer, cpu)[ANNOTATE_BUF][write], buf, count) != 0) - return -1; - } - per_cpu(gator_buffer_write, cpu)[ANNOTATE_BUF] = (write + count) & gator_buffer_mask[ANNOTATE_BUF]; - - return 0; -} - -static ssize_t annotate_write(struct file *file, char const __user *buf, size_t count_orig, loff_t *offset) -{ - int tid, cpu, header_size, available, contiguous, length1, length2, size, count = count_orig & 0x7fffffff; - - if (*offset) - return -EINVAL; - - if (!collect_annotations) { - return count_orig; - } - - cpu = 0; // Annotation only uses a single per-cpu buffer as the data must be in order to the engine - - if (file == NULL) { - tid = -1; // set the thread id to the kernel thread - } else { - tid = current->pid; - } - - // synchronize between cores - spin_lock(&annotate_lock); - - // determine total size of the payload - header_size = MAXSIZE_PACK32 * 3 + MAXSIZE_PACK64; - available = buffer_bytes_available(cpu, ANNOTATE_BUF) - header_size; - size = count < available ? count : available; - - if (size <= 0) { - size = 0; - goto annotate_write_out; - } - - // synchronize shared variables annotateBuf and annotatePos - if (collect_annotations && per_cpu(gator_buffer, cpu)[ANNOTATE_BUF]) { - gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, smp_processor_id()); - gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, tid); - gator_buffer_write_packed_int64(cpu, ANNOTATE_BUF, gator_get_time()); - gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, size); - - // determine the sizes to capture, length1 + length2 will equal size - contiguous = contiguous_space_available(cpu, ANNOTATE_BUF); - if (size < contiguous) { - length1 = size; - length2 = 0; - } else { - length1 = contiguous; - length2 = size - contiguous; - } - - if (annotate_copy(file, buf, length1) != 0) { - size = -EINVAL; - goto annotate_write_out; - } - - if (length2 > 0 && annotate_copy(file, &buf[length1], length2) != 0) { - size = -EINVAL; - goto annotate_write_out; - } - - // Check and commit; commit is set to occur once buffer is 3/4 full - buffer_check(cpu, ANNOTATE_BUF); - } - -annotate_write_out: - spin_unlock(&annotate_lock); - - // return the number of bytes written - return size; -} - -#include "gator_annotate_kernel.c" - -static int annotate_release(struct inode *inode, struct file *file) -{ - int cpu = 0; - - // synchronize between cores - spin_lock(&annotate_lock); - - if (per_cpu(gator_buffer, cpu)[ANNOTATE_BUF] && buffer_check_space(cpu, ANNOTATE_BUF, MAXSIZE_PACK64 + 2 * MAXSIZE_PACK32)) { - uint32_t tid = current->pid; - gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, tid); - gator_buffer_write_packed_int64(cpu, ANNOTATE_BUF, 0); // time - gator_buffer_write_packed_int(cpu, ANNOTATE_BUF, 0); // size - } - - spin_unlock(&annotate_lock); - - return 0; -} - -static const struct file_operations annotate_fops = { - .write = annotate_write, - .release = annotate_release -}; - -static int gator_annotate_create_files(struct super_block *sb, struct dentry *root) -{ - return gatorfs_create_file_perm(sb, root, "annotate", &annotate_fops, 0666); -} - -static int gator_annotate_start(void) -{ - collect_annotations = true; - return 0; -} - -static void gator_annotate_stop(void) -{ - collect_annotations = false; -} |