diff options
| author | Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | 2009-08-28 10:54:41 -0700 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2009-08-28 10:54:41 -0700 |
| commit | 14e0e6796a0d460ac6f7727616161dc317bbbf3a (patch) | |
| tree | 06ff0894445ad8b08aa15e479742131396e1021b /arch/arm/plat-omap/iommu.c | |
| parent | 613f77696e2c489e87def86a443fb4889acb95aa (diff) | |
OMAP: iommu: add initial debugfs support
This enables to peek the following data.
$ /debug/iommu/isp# ls
mem nr_tlb_entries regs
mmap pagetable tlb
$ /debug/iommu/isp# head pagetable
L: da: pa:
-----------------------------------------
2: 00001000 8ae4a002
2: 00002000 8e7bb002
2: 00003000 8ae49002
2: 00004000 8ae65002
.....
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/iommu.c')
| -rw-r--r-- | arch/arm/plat-omap/iommu.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c index 4a0301399013..4b6012707307 100644 --- a/arch/arm/plat-omap/iommu.c +++ b/arch/arm/plat-omap/iommu.c @@ -351,16 +351,14 @@ EXPORT_SYMBOL_GPL(flush_iotlb_all); #if defined(CONFIG_OMAP_IOMMU_DEBUG_MODULE) -ssize_t iommu_dump_ctx(struct iommu *obj, char *buf) +ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t bytes) { - ssize_t bytes; - if (!obj || !buf) return -EINVAL; clk_enable(obj->clk); - bytes = arch_iommu->dump_ctx(obj, buf); + bytes = arch_iommu->dump_ctx(obj, buf, bytes); clk_disable(obj->clk); @@ -368,7 +366,7 @@ ssize_t iommu_dump_ctx(struct iommu *obj, char *buf) } EXPORT_SYMBOL_GPL(iommu_dump_ctx); -static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs) +static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs, int num) { int i; struct iotlb_lock saved, l; @@ -379,7 +377,7 @@ static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs) iotlb_lock_get(obj, &saved); memcpy(&l, &saved, sizeof(saved)); - for (i = 0; i < obj->nr_tlb_entries; i++) { + for (i = 0; i < num; i++) { struct cr_regs tmp; iotlb_lock_get(obj, &l); @@ -402,18 +400,21 @@ static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs) * @obj: target iommu * @buf: output buffer **/ -size_t dump_tlb_entries(struct iommu *obj, char *buf) +size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t bytes) { - int i, n; + int i, num; struct cr_regs *cr; char *p = buf; - cr = kcalloc(obj->nr_tlb_entries, sizeof(*cr), GFP_KERNEL); + num = bytes / sizeof(*cr); + num = min(obj->nr_tlb_entries, num); + + cr = kcalloc(num, sizeof(*cr), GFP_KERNEL); if (!cr) return 0; - n = __dump_tlb_entries(obj, cr); - for (i = 0; i < n; i++) + num = __dump_tlb_entries(obj, cr, num); + for (i = 0; i < num; i++) p += iotlb_dump_cr(obj, cr + i, p); kfree(cr); |