diff options
Diffstat (limited to 'arch/arm/mach-tegra/iovmm.c')
| -rw-r--r-- | arch/arm/mach-tegra/iovmm.c | 22 |
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, |