1 files changed, 0 insertions, 275 deletions
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
deleted file mode 100644
index 79d5ed6c38cc..000000000000
--- a/tools/perf/lib/mmap.c
+++ /dev/null
@@ -1,275 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <sys/mman.h>
-#include <inttypes.h>
-#include <asm/bug.h>
-#include <errno.h>
-#include <string.h>
-#include <linux/ring_buffer.h>
-#include <linux/perf_event.h>
-#include <perf/mmap.h>
-#include <perf/event.h>
-#include <internal/mmap.h>
-#include <internal/lib.h>
-#include <linux/kernel.h>
-#include "internal.h"
-
-void perf_mmap__init(struct perf_mmap *map, struct perf_mmap *prev,
-		     bool overwrite, libperf_unmap_cb_t unmap_cb)
-{
-	map->fd = -1;
-	map->overwrite = overwrite;
-	map->unmap_cb  = unmap_cb;
-	refcount_set(&map->refcnt, 0);
-	if (prev)
-		prev->next = map;
-}
-
-size_t perf_mmap__mmap_len(struct perf_mmap *map)
-{
-	return map->mask + 1 + page_size;
-}
-
-int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
-		    int fd, int cpu)
-{
-	map->prev = 0;
-	map->mask = mp->mask;
-	map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot,
-			 MAP_SHARED, fd, 0);
-	if (map->base == MAP_FAILED) {
-		map->base = NULL;
-		return -1;
-	}
-
-	map->fd  = fd;
-	map->cpu = cpu;
-	return 0;
-}
-
-void perf_mmap__munmap(struct perf_mmap *map)
-{
-	if (map && map->base != NULL) {
-		munmap(map->base, perf_mmap__mmap_len(map));
-		map->base = NULL;
-		map->fd = -1;
-		refcount_set(&map->refcnt, 0);
-	}
-	if (map && map->unmap_cb)
-		map->unmap_cb(map);
-}
-
-void perf_mmap__get(struct perf_mmap *map)
-{
-	refcount_inc(&map->refcnt);
-}
-
-void perf_mmap__put(struct perf_mmap *map)
-{
-	BUG_ON(map->base && refcount_read(&map->refcnt) == 0);
-
-	if (refcount_dec_and_test(&map->refcnt))
-		perf_mmap__munmap(map);
-}
-
-static inline void perf_mmap__write_tail(struct perf_mmap *md, u64 tail)
-{
-	ring_buffer_write_tail(md->base, tail);
-}
-
-u64 perf_mmap__read_head(struct perf_mmap *map)
-{
-	return ring_buffer_read_head(map->base);
-}
-
-static bool perf_mmap__empty(struct perf_mmap *map)
-{
-	struct perf_event_mmap_page *pc = map->base;
-
-	return perf_mmap__read_head(map) == map->prev && !pc->aux_size;
-}
-
-void perf_mmap__consume(struct perf_mmap *map)
-{
-	if (!map->overwrite) {
-		u64 old = map->prev;
-
-		perf_mmap__write_tail(map, old);
-	}
-
-	if (refcount_read(&map->refcnt) == 1 && perf_mmap__empty(map))
-		perf_mmap__put(map);
-}
-
-static int overwrite_rb_find_range(void *buf, int mask, u64 *start, u64 *end)
-{
-	struct perf_event_header *pheader;
-	u64 evt_head = *start;
-	int size = mask + 1;
-
-	pr_debug2("%s: buf=%p, start=%"PRIx64"\n", __func__, buf, *start);
-	pheader = (struct perf_event_header *)(buf + (*start & mask));
-	while (true) {
-		if (evt_head - *start >= (unsigned int)size) {
-			pr_debug("Finished reading overwrite ring buffer: rewind\n");
-			if (evt_head - *start > (unsigned int)size)
-				evt_head -= pheader->size;
-			*end = evt_head;
-			return 0;
-		}
-
-		pheader = (struct perf_event_header *)(buf + (evt_head & mask));
-
-		if (pheader->size == 0) {
-			pr_debug("Finished reading overwrite ring buffer: get start\n");
-			*end = evt_head;
-			return 0;
-		}
-
-		evt_head += pheader->size;
-		pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
-	}
-	WARN_ONCE(1, "Shouldn't get here\n");
-	return -1;
-}
-
-/*
- * Report the start and end of the available data in ringbuffer
- */
-static int __perf_mmap__read_init(struct perf_mmap *md)
-{
-	u64 head = perf_mmap__read_head(md);
-	u64 old = md->prev;
-	unsigned char *data = md->base + page_size;
-	unsigned long size;
-
-	md->start = md->overwrite ? head : old;
-	md->end = md->overwrite ? old : head;
-
-	if ((md->end - md->start) < md->flush)
-		return -EAGAIN;
-
-	size = md->end - md->start;
-	if (size > (unsigned long)(md->mask) + 1) {
-		if (!md->overwrite) {
-			WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
-
-			md->prev = head;
-			perf_mmap__consume(md);
-			return -EAGAIN;
-		}
-
-		/*
-		 * Backward ring buffer is full. We still have a chance to read
-		 * most of data from it.
-		 */
-		if (overwrite_rb_find_range(data, md->mask, &md->start, &md->end))
-			return -EINVAL;
-	}
-
-	return 0;
-}
-
-int perf_mmap__read_init(struct perf_mmap *map)
-{
-	/*
-	 * Check if event was unmapped due to a POLLHUP/POLLERR.
-	 */
-	if (!refcount_read(&map->refcnt))
-		return -ENOENT;
-
-	return __perf_mmap__read_init(map);
-}
-
-/*
- * Mandatory for overwrite mode
- * The direction of overwrite mode is backward.
- * The last perf_mmap__read() will set tail to map->core.prev.
- * Need to correct the map->core.prev to head which is the end of next read.
- */
-void perf_mmap__read_done(struct perf_mmap *map)
-{
-	/*
-	 * Check if event was unmapped due to a POLLHUP/POLLERR.
-	 */
-	if (!refcount_read(&map->refcnt))
-		return;
-
-	map->prev = perf_mmap__read_head(map);
-}
-
-/* When check_messup is true, 'end' must points to a good entry */
-static union perf_event *perf_mmap__read(struct perf_mmap *map,
-					 u64 *startp, u64 end)
-{
-	unsigned char *data = map->base + page_size;
-	union perf_event *event = NULL;
-	int diff = end - *startp;
-
-	if (diff >= (int)sizeof(event->header)) {
-		size_t size;
-
-		event = (union perf_event *)&data[*startp & map->mask];
-		size = event->header.size;
-
-		if (size < sizeof(event->header) || diff < (int)size)
-			return NULL;
-
-		/*
-		 * Event straddles the mmap boundary -- header should always
-		 * be inside due to u64 alignment of output.
-		 */
-		if ((*startp & map->mask) + size != ((*startp + size) & map->mask)) {
-			unsigned int offset = *startp;
-			unsigned int len = min(sizeof(*event), size), cpy;
-			void *dst = map->event_copy;
-
-			do {
-				cpy = min(map->mask + 1 - (offset & map->mask), len);
-				memcpy(dst, &data[offset & map->mask], cpy);
-				offset += cpy;
-				dst += cpy;
-				len -= cpy;
-			} while (len);
-
-			event = (union perf_event *)map->event_copy;
-		}
-
-		*startp += size;
-	}
-
-	return event;
-}
-
-/*
- * Read event from ring buffer one by one.
- * Return one event for each call.
- *
- * Usage:
- * perf_mmap__read_init()
- * while(event = perf_mmap__read_event()) {
- *	//process the event
- *	perf_mmap__consume()
- * }
- * perf_mmap__read_done()
- */
-union perf_event *perf_mmap__read_event(struct perf_mmap *map)
-{
-	union perf_event *event;
-
-	/*
-	 * Check if event was unmapped due to a POLLHUP/POLLERR.
-	 */
-	if (!refcount_read(&map->refcnt))
-		return NULL;
-
-	/* non-overwirte doesn't pause the ringbuffer */
-	if (!map->overwrite)
-		map->end = perf_mmap__read_head(map);
-
-	event = perf_mmap__read(map, &map->start, map->end);
-
-	if (!map->overwrite)
-		map->prev = map->start;
-
-	return event;
-}