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Diffstat (limited to 'arch/arm/mach-tegra/iovmm.c')
-rw-r--r--arch/arm/mach-tegra/iovmm.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/iovmm.c b/arch/arm/mach-tegra/iovmm.c
index 1f9e49902188..1afdaf3b53cc 100644
--- a/arch/arm/mach-tegra/iovmm.c
+++ b/arch/arm/mach-tegra/iovmm.c
@@ -90,6 +90,28 @@ static tegra_iovmm_addr_t iovmm_align_down(struct tegra_iovmm_device *dev,
#define iovmprint(fmt, arg...) snprintf(page+len, count-len, fmt, ## arg)
+size_t tegra_iovmm_get_max_free(struct tegra_iovmm_client *client)
+{
+ struct rb_node *n;
+ struct tegra_iovmm_block *b;
+ struct tegra_iovmm_domain *domain = client->domain;
+
+ spin_lock(&domain->block_lock);
+ n = rb_first(&domain->all_blocks);
+ tegra_iovmm_addr_t max_free = 0;
+ while (n) {
+ b = rb_entry(n, struct tegra_iovmm_block, all_node);
+ n = rb_next(n);
+ if (test_bit(BK_free, &b->flags)) {
+ max_free = max_t(tegra_iovmm_addr_t,
+ max_free, iovmm_length(b));
+ }
+ }
+ spin_unlock(&domain->block_lock);
+ return max_free;
+}
+
+
static void tegra_iovmm_block_stats(struct tegra_iovmm_domain *domain,
unsigned int *num_blocks, unsigned int *num_free,
tegra_iovmm_addr_t *total, tegra_iovmm_addr_t *total_free,