diff options
| author | Kirill Artamonov <kartamonov@nvidia.com> | 2011-06-26 21:37:18 +0300 |
|---|---|---|
| committer | Rohan Somvanshi <rsomvanshi@nvidia.com> | 2011-06-28 22:57:12 -0700 |
| commit | 4a4cae3323d3287e77fdc504e38656974ef24848 (patch) | |
| tree | 87fcc00355de2566fca2a0104770cbf57dcb1e1b /arch | |
| parent | ddfc93d27830a28a1c9786fd5bce6dc35727e9ff (diff) | |
video: tegra: nvmap: fix GART pin lockups
Fix GART lockups caused by fragmentation by evicting
mapped areas from iovm space after unsuccessful array
pinning attempt.
Fix double unpin error happening during interrupted
submit.
Fix possible sleep in atomic context in iovmm code
(semaphore inside spinlock) by replacing spinlock
with mutex.
Fix race between handle_unpin and pin_handle.
bug 838579
bug 838073
bug 818058
bug 844307
Conflicts:
drivers/video/tegra/nvmap/nvmap_mru.c
Change-Id: Ie44fa88510f62ce5c7d31af3b07afdf69a3ad4a6
Reviewed-on: http://git-master/r/38430
Reviewed-by: Kirill Artamonov <kartamonov@nvidia.com>
Tested-by: Kirill Artamonov <kartamonov@nvidia.com>
Tested-by: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-tegra/include/mach/iovmm.h | 3 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/iovmm.c | 22 |
2 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/include/mach/iovmm.h b/arch/arm/mach-tegra/include/mach/iovmm.h index 8f111605e065..e30d3dcf2859 100644 --- a/arch/arm/mach-tegra/include/mach/iovmm.h +++ b/arch/arm/mach-tegra/include/mach/iovmm.h @@ -166,6 +166,9 @@ void tegra_iovmm_unzap_vm(struct tegra_iovmm_area *vm); /* called by clients to return an iovmm_area to the free pool for the domain */ void tegra_iovmm_free_vm(struct tegra_iovmm_area *vm); +/* returns size of largest free iovm block */ +size_t tegra_iovmm_get_max_free(struct tegra_iovmm_client *client); + /* called by client software to map the page-aligned I/O address vaddr to * a specific physical address pfn. I/O VMA should have been created with * a NULL tegra_iovmm_area_ops structure. */ 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, |