diff options
Diffstat (limited to 'drivers/parisc/ccio-dma.c')
| -rw-r--r-- | drivers/parisc/ccio-dma.c | 43 |
1 files changed, 17 insertions, 26 deletions
diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c index b30e38f..dcc1e99 100644 --- a/drivers/parisc/ccio-dma.c +++ b/drivers/parisc/ccio-dma.c @@ -66,15 +66,8 @@ #undef DEBUG_CCIO_RUN_SG #ifdef CONFIG_PROC_FS -/* - * CCIO_SEARCH_TIME can help measure how fast the bitmap search is. - * impacts performance though - ditch it if you don't use it. - */ -#define CCIO_SEARCH_TIME -#undef CCIO_MAP_STATS -#else -#undef CCIO_SEARCH_TIME -#undef CCIO_MAP_STATS +/* depends on proc fs support. But costs CPU performance. */ +#undef CCIO_COLLECT_STATS #endif #include <linux/proc_fs.h> @@ -239,12 +232,10 @@ struct ioc { u32 res_size; /* size of resource map in bytes */ spinlock_t res_lock; -#ifdef CCIO_SEARCH_TIME +#ifdef CCIO_COLLECT_STATS #define CCIO_SEARCH_SAMPLE 0x100 unsigned long avg_search[CCIO_SEARCH_SAMPLE]; unsigned long avg_idx; /* current index into avg_search */ -#endif -#ifdef CCIO_MAP_STATS unsigned long used_pages; unsigned long msingle_calls; unsigned long msingle_pages; @@ -351,7 +342,7 @@ ccio_alloc_range(struct ioc *ioc, struct device *dev, size_t size) unsigned int pages_needed = size >> IOVP_SHIFT; unsigned int res_idx; unsigned long boundary_size; -#ifdef CCIO_SEARCH_TIME +#ifdef CCIO_COLLECT_STATS unsigned long cr_start = mfctl(16); #endif @@ -406,7 +397,7 @@ resource_found: DBG_RES("%s() res_idx %d res_hint: %d\n", __func__, res_idx, ioc->res_hint); -#ifdef CCIO_SEARCH_TIME +#ifdef CCIO_COLLECT_STATS { unsigned long cr_end = mfctl(16); unsigned long tmp = cr_end - cr_start; @@ -416,7 +407,7 @@ resource_found: ioc->avg_search[ioc->avg_idx++] = cr_start; ioc->avg_idx &= CCIO_SEARCH_SAMPLE - 1; #endif -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS ioc->used_pages += pages_needed; #endif /* @@ -452,7 +443,7 @@ ccio_free_range(struct ioc *ioc, dma_addr_t iova, unsigned long pages_mapped) DBG_RES("%s(): res_idx: %d pages_mapped %d\n", __func__, res_idx, pages_mapped); -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS ioc->used_pages -= pages_mapped; #endif @@ -764,7 +755,7 @@ ccio_map_single(struct device *dev, void *addr, size_t size, size = ALIGN(size + offset, IOVP_SIZE); spin_lock_irqsave(&ioc->res_lock, flags); -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS ioc->msingle_calls++; ioc->msingle_pages += size >> IOVP_SHIFT; #endif @@ -828,7 +819,7 @@ ccio_unmap_single(struct device *dev, dma_addr_t iova, size_t size, spin_lock_irqsave(&ioc->res_lock, flags); -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS ioc->usingle_calls++; ioc->usingle_pages += size >> IOVP_SHIFT; #endif @@ -894,7 +885,7 @@ ccio_free_consistent(struct device *dev, size_t size, void *cpu_addr, */ #define PIDE_FLAG 0x80000000UL -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS #define IOMMU_MAP_STATS #endif #include "iommu-helpers.h" @@ -938,7 +929,7 @@ ccio_map_sg(struct device *dev, struct scatterlist *sglist, int nents, spin_lock_irqsave(&ioc->res_lock, flags); -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS ioc->msg_calls++; #endif @@ -997,13 +988,13 @@ ccio_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents, DBG_RUN_SG("%s() START %d entries, %08lx,%x\n", __func__, nents, sg_virt_addr(sglist), sglist->length); -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS ioc->usg_calls++; #endif while(sg_dma_len(sglist) && nents--) { -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS ioc->usg_pages += sg_dma_len(sglist) >> PAGE_SHIFT; #endif ccio_unmap_single(dev, sg_dma_address(sglist), @@ -1048,7 +1039,7 @@ static int ccio_proc_info(struct seq_file *m, void *p) len += seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n", total_pages * 8, total_pages); -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS len += seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n", total_pages - ioc->used_pages, ioc->used_pages, (int)(ioc->used_pages * 100 / total_pages)); @@ -1057,7 +1048,7 @@ static int ccio_proc_info(struct seq_file *m, void *p) len += seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n", ioc->res_size, total_pages); -#ifdef CCIO_SEARCH_TIME +#ifdef CCIO_COLLECT_STATS min = max = ioc->avg_search[0]; for(j = 0; j < CCIO_SEARCH_SAMPLE; ++j) { avg += ioc->avg_search[j]; @@ -1070,7 +1061,7 @@ static int ccio_proc_info(struct seq_file *m, void *p) len += seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n", min, avg, max); #endif -#ifdef CCIO_MAP_STATS +#ifdef CCIO_COLLECT_STATS len += seq_printf(m, "pci_map_single(): %8ld calls %8ld pages (avg %d/1000)\n", ioc->msingle_calls, ioc->msingle_pages, (int)((ioc->msingle_pages * 1000)/ioc->msingle_calls)); @@ -1088,7 +1079,7 @@ static int ccio_proc_info(struct seq_file *m, void *p) len += seq_printf(m, "pci_unmap_sg() : %8ld calls %8ld pages (avg %d/1000)\n\n\n", ioc->usg_calls, ioc->usg_pages, (int)((ioc->usg_pages * 1000)/ioc->usg_calls)); -#endif /* CCIO_MAP_STATS */ +#endif /* CCIO_COLLECT_STATS */ ioc = ioc->next; } |
