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[WIP] mmngr carveout debugfs #4

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[WIP] mmngr carveout debugfs #4

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157 changes: 157 additions & 0 deletions mmngr_drv/mmngr/mmngr-module/files/mmngr/drv/mmngr_drv.c
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Original file line number Diff line number Diff line change
Expand Up @@ -75,6 +75,12 @@
#include <linux/of_reserved_mem.h>
#include <linux/sizes.h>
#include <linux/sys_soc.h>
#ifdef MMNGR_CO_DEBUGFS
#include <linux/debugfs.h>
#ifdef MMNGR_CO_DEBUGFS_TEST
#include <linux/random.h>
#endif
#endif

#include "mmngr_public.h"
#include "mmngr_private.h"
Expand All @@ -97,6 +103,9 @@ static bool is_sspbuf_valid;
static u64 mm_sspbuf_addr;
static u64 mm_sspbuf_size;
#endif
#ifdef MMNGR_CO_DEBUGFS
static struct dentry *debugfs_root;
#endif
#ifdef IPMMU_MMU_SUPPORT
static bool ipmmu_common_init_done;
static bool is_mmu_tlb_disabled;
Expand Down Expand Up @@ -678,6 +687,9 @@ static int alloc_bm(struct BM *pb,
pb->order = order;
pb->top_phy_addr = top_phy_addr;
pb->end_bit = nbits;
#ifdef MMNGR_CO_DEBUGFS
atomic_set(&pb->used, 0);
#endif

return 0;
}
Expand Down Expand Up @@ -726,6 +738,10 @@ static int mm_ioc_alloc_co(struct BM *pb, int __user *in, struct MM_PARAM *out)
#endif
out->flag = tmp.flag;

#ifdef MMNGR_CO_DEBUGFS
atomic_add(nbits << pb->order, &pb->used);
#endif

return 0;
}

Expand Down Expand Up @@ -805,6 +821,9 @@ static void mm_ioc_free_co(struct BM *pb, struct MM_PARAM *p)
spin_lock(&lock);
bitmap_clear(pb->bits, start_bit, nbits);
spin_unlock(&lock);
#ifdef MMNGR_CO_DEBUGFS
atomic_sub(nbits << pb->order, &pb->used);
#endif
memset(p, 0, sizeof(struct MM_PARAM));
}

Expand Down Expand Up @@ -1696,6 +1715,136 @@ static struct miscdevice misc = {
.fops = &fops,
};

#ifdef MMNGR_CO_DEBUGFS

static inline void bitmap_next_clear_region(unsigned long *bitmap,
unsigned int *rs, unsigned int *re,
unsigned int end)
{
*rs = find_next_zero_bit(bitmap, end, *rs);
*re = find_next_bit(bitmap, end, *rs + 1);
}

#define bitmap_for_each_clear_region(bitmap, rs, re, start, end) \
for ((rs) = (start), \
bitmap_next_clear_region((bitmap), &(rs), &(re), (end)); \
(rs) < (re); \
(rs) = (re) + 1, \
bitmap_next_clear_region((bitmap), &(rs), &(re), (end)))

#define DEFINE_SHOW_ATTRIBUTE(__name) \
static int __name ## _open(struct inode *inode, struct file *file) \
{ \
return single_open(file, __name ## _show, inode->i_private); \
} \
\
static const struct file_operations __name ## _fops = { \
.owner = THIS_MODULE, \
.open = __name ## _open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
}

static int mm_co_info_show(struct seq_file *s, void *v)
{
struct BM *pb = s->private;
seq_printf(s, "top_phy_addr=0x%llx\n", pb->top_phy_addr);
seq_printf(s, "order=%lu\n", pb->order);
seq_printf(s, "end_bit=%lu\n", pb->end_bit);
return 0;
}

DEFINE_SHOW_ATTRIBUTE(mm_co_info);

static int mm_co_maxchunk_get(void *data, u64 *val)
{
struct BM *pb = data;
unsigned int rs, re;
*val = 0;
spin_lock(&lock);
bitmap_for_each_clear_region(pb->bits, rs, re, 0, pb->end_bit) {
*val = max(*val, (u64)re - rs);
}
spin_unlock(&lock);
*val <<= pb->order;
return 0;
}

DEFINE_DEBUGFS_ATTRIBUTE(mm_co_maxchunk_fops, mm_co_maxchunk_get, NULL, "%llu\n");

static int mm_co_bitmapx_show(struct seq_file *s, void *v)
{
struct BM *pb = s->private;
seq_printf(s, "%*pb\n", pb->end_bit, pb->bits);
return 0;
}

DEFINE_SHOW_ATTRIBUTE(mm_co_bitmapx);

static int mm_co_bitmapl_show(struct seq_file *s, void *v)
{
struct BM *pb = s->private;
seq_printf(s, "%*pbl\n", pb->end_bit, pb->bits);
return 0;
}

DEFINE_SHOW_ATTRIBUTE(mm_co_bitmapl);

#ifdef MMNGR_CO_DEBUGFS_TEST

static int mm_co_test(void *data, u64 val)
{
struct BM *pb = data;
int i;
unsigned int start;
bitmap_zero(pb->bits, pb->end_bit);
if (val == 0) {
return 0;
}
for (i = 0; i < pb->end_bit / 2; i++) {
bitmap_set(pb->bits, i * 2, 1);
}
start = get_random_int() % (pb->end_bit - val - 1);
start = find_next_zero_bit(pb->bits, pb->end_bit, start);
bitmap_clear(pb->bits, start, val);
return 0;
}

DEFINE_DEBUGFS_ATTRIBUTE(mm_co_test_fops, NULL, mm_co_test, "%llu\n");

#endif

static void mm_co_debugfs_add(struct dentry *root, const char *name, struct BM *pb)
{
struct dentry *dir = debugfs_create_dir(name, root);

debugfs_create_file("info", S_IRUGO, dir, pb, &mm_co_info_fops);
debugfs_create_atomic_t("used", S_IRUGO, dir, &pb->used);
debugfs_create_file("maxchunk", S_IRUGO, dir, pb, &mm_co_maxchunk_fops);

debugfs_create_u32_array("bitmap32", S_IRUGO, dir, (u32*)pb->bits, DIV_ROUND_UP(pb->end_bit, BITS_PER_BYTE * sizeof(u32)));
debugfs_create_file("bitmapx", S_IRUGO, dir, pb, &mm_co_bitmapx_fops);
debugfs_create_file("bitmapl", S_IRUGO, dir, pb, &mm_co_bitmapl_fops);

#ifdef MMNGR_CO_DEBUGFS_TEST
debugfs_create_file("test", S_IWUSR, dir, pb, &mm_co_test_fops);
#endif
}

static void mm_co_debugfs_init(void)
{
debugfs_root = debugfs_create_dir("mmngr", NULL);
mm_co_debugfs_add(debugfs_root, "co", &bm);
}

static void mm_co_debugfs_deinit(void)
{
debugfs_remove_recursive(debugfs_root);
}

#endif

static int mm_probe(struct platform_device *pdev)
{
int ret = 0;
Expand Down Expand Up @@ -1795,6 +1944,10 @@ static int mm_probe(struct platform_device *pdev)

spin_lock_init(&lock);

#ifdef MMNGR_CO_DEBUGFS
mm_co_debugfs_init();
#endif

return 0;

err_alloc:
Expand All @@ -1806,6 +1959,10 @@ static int mm_remove(struct platform_device *pdev)
{
u32 i;

#ifdef MMNGR_CO_DEBUGFS
mm_co_debugfs_deinit();
#endif

misc_deregister(&misc);

#ifdef IPMMU_MMU_SUPPORT
Expand Down
3 changes: 3 additions & 0 deletions mmngr_drv/mmngr/mmngr-module/files/mmngr/include/mmngr_private.h
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Original file line number Diff line number Diff line change
Expand Up @@ -81,6 +81,9 @@ struct BM {
unsigned long order;
unsigned long end_bit;
unsigned long *bits;
#ifdef MMNGR_CO_DEBUGFS
atomic_t used;
#endif
};

struct LOSSY_INFO {
Expand Down