iommu/amd: Remove statistics code
The statistics are not really used for anything and should
be replaced by generic and per-device statistic counters.
Remove the code for now.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index dd1dc39..3bd2548 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -124,16 +124,6 @@
your BIOS for an option to enable it or if you have an IVRS ACPI
table.
-config AMD_IOMMU_STATS
- bool "Export AMD IOMMU statistics to debugfs"
- depends on AMD_IOMMU
- select DEBUG_FS
- ---help---
- This option enables code in the AMD IOMMU driver to collect various
- statistics about whats happening in the driver and exports that
- information to userspace via debugfs.
- If unsure, say N.
-
config AMD_IOMMU_V2
tristate "AMD IOMMU Version 2 driver"
depends on AMD_IOMMU
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 1191485..de9f028 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -489,70 +489,6 @@
*/
}
-#ifdef CONFIG_AMD_IOMMU_STATS
-
-/*
- * Initialization code for statistics collection
- */
-
-DECLARE_STATS_COUNTER(compl_wait);
-DECLARE_STATS_COUNTER(cnt_map_single);
-DECLARE_STATS_COUNTER(cnt_unmap_single);
-DECLARE_STATS_COUNTER(cnt_map_sg);
-DECLARE_STATS_COUNTER(cnt_unmap_sg);
-DECLARE_STATS_COUNTER(cnt_alloc_coherent);
-DECLARE_STATS_COUNTER(cnt_free_coherent);
-DECLARE_STATS_COUNTER(cross_page);
-DECLARE_STATS_COUNTER(domain_flush_single);
-DECLARE_STATS_COUNTER(domain_flush_all);
-DECLARE_STATS_COUNTER(alloced_io_mem);
-DECLARE_STATS_COUNTER(total_map_requests);
-DECLARE_STATS_COUNTER(complete_ppr);
-DECLARE_STATS_COUNTER(invalidate_iotlb);
-DECLARE_STATS_COUNTER(invalidate_iotlb_all);
-DECLARE_STATS_COUNTER(pri_requests);
-
-static struct dentry *stats_dir;
-static struct dentry *de_fflush;
-
-static void amd_iommu_stats_add(struct __iommu_counter *cnt)
-{
- if (stats_dir == NULL)
- return;
-
- cnt->dent = debugfs_create_u64(cnt->name, 0444, stats_dir,
- &cnt->value);
-}
-
-static void amd_iommu_stats_init(void)
-{
- stats_dir = debugfs_create_dir("amd-iommu", NULL);
- if (stats_dir == NULL)
- return;
-
- de_fflush = debugfs_create_bool("fullflush", 0444, stats_dir,
- &amd_iommu_unmap_flush);
-
- amd_iommu_stats_add(&compl_wait);
- amd_iommu_stats_add(&cnt_map_single);
- amd_iommu_stats_add(&cnt_unmap_single);
- amd_iommu_stats_add(&cnt_map_sg);
- amd_iommu_stats_add(&cnt_unmap_sg);
- amd_iommu_stats_add(&cnt_alloc_coherent);
- amd_iommu_stats_add(&cnt_free_coherent);
- amd_iommu_stats_add(&cross_page);
- amd_iommu_stats_add(&domain_flush_single);
- amd_iommu_stats_add(&domain_flush_all);
- amd_iommu_stats_add(&alloced_io_mem);
- amd_iommu_stats_add(&total_map_requests);
- amd_iommu_stats_add(&complete_ppr);
- amd_iommu_stats_add(&invalidate_iotlb);
- amd_iommu_stats_add(&invalidate_iotlb_all);
- amd_iommu_stats_add(&pri_requests);
-}
-
-#endif
-
/****************************************************************************
*
* Interrupt handling functions
@@ -675,8 +611,6 @@
{
struct amd_iommu_fault fault;
- INC_STATS_COUNTER(pri_requests);
-
if (PPR_REQ_TYPE(raw[0]) != PPR_REQ_FAULT) {
pr_err_ratelimited("AMD-Vi: Unknown PPR request received\n");
return;
@@ -2641,11 +2575,6 @@
pages = iommu_num_pages(paddr, size, PAGE_SIZE);
paddr &= PAGE_MASK;
- INC_STATS_COUNTER(total_map_requests);
-
- if (pages > 1)
- INC_STATS_COUNTER(cross_page);
-
if (align)
align_mask = (1UL << get_order(size)) - 1;
@@ -2666,8 +2595,6 @@
}
address += offset;
- ADD_STATS_COUNTER(alloced_io_mem, size);
-
if (unlikely(amd_iommu_np_cache)) {
domain_flush_pages(&dma_dom->domain, address, size);
domain_flush_complete(&dma_dom->domain);
@@ -2715,8 +2642,6 @@
start += PAGE_SIZE;
}
- SUB_STATS_COUNTER(alloced_io_mem, size);
-
dma_ops_free_addresses(dma_dom, dma_addr, pages);
}
@@ -2732,8 +2657,6 @@
struct protection_domain *domain;
u64 dma_mask;
- INC_STATS_COUNTER(cnt_map_single);
-
domain = get_domain(dev);
if (PTR_ERR(domain) == -EINVAL)
return (dma_addr_t)paddr;
@@ -2754,8 +2677,6 @@
{
struct protection_domain *domain;
- INC_STATS_COUNTER(cnt_unmap_single);
-
domain = get_domain(dev);
if (IS_ERR(domain))
return;
@@ -2778,8 +2699,6 @@
int mapped_elems = 0;
u64 dma_mask;
- INC_STATS_COUNTER(cnt_map_sg);
-
domain = get_domain(dev);
if (IS_ERR(domain))
return 0;
@@ -2825,8 +2744,6 @@
struct scatterlist *s;
int i;
- INC_STATS_COUNTER(cnt_unmap_sg);
-
domain = get_domain(dev);
if (IS_ERR(domain))
return;
@@ -2849,8 +2766,6 @@
struct protection_domain *domain;
struct page *page;
- INC_STATS_COUNTER(cnt_alloc_coherent);
-
domain = get_domain(dev);
if (PTR_ERR(domain) == -EINVAL) {
page = alloc_pages(flag, get_order(size));
@@ -2904,8 +2819,6 @@
struct protection_domain *domain;
struct page *page;
- INC_STATS_COUNTER(cnt_free_coherent);
-
page = virt_to_page(virt_addr);
size = PAGE_ALIGN(size);
@@ -2997,8 +2910,6 @@
if (!swiotlb)
dma_ops = &nommu_dma_ops;
- amd_iommu_stats_init();
-
if (amd_iommu_unmap_flush)
pr_info("AMD-Vi: IO/TLB flush on unmap enabled\n");
else
@@ -3489,8 +3400,6 @@
static int __amd_iommu_flush_page(struct protection_domain *domain, int pasid,
u64 address)
{
- INC_STATS_COUNTER(invalidate_iotlb);
-
return __flush_pasid(domain, pasid, address, false);
}
@@ -3511,8 +3420,6 @@
static int __amd_iommu_flush_tlb(struct protection_domain *domain, int pasid)
{
- INC_STATS_COUNTER(invalidate_iotlb_all);
-
return __flush_pasid(domain, pasid, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,
true);
}
@@ -3632,8 +3539,6 @@
struct amd_iommu *iommu;
struct iommu_cmd cmd;
- INC_STATS_COUNTER(complete_ppr);
-
dev_data = get_dev_data(&pdev->dev);
iommu = amd_iommu_rlookup_table[dev_data->devid];
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index b6b14d2..590956a 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -682,30 +682,4 @@
return -EINVAL;
}
-#ifdef CONFIG_AMD_IOMMU_STATS
-
-struct __iommu_counter {
- char *name;
- struct dentry *dent;
- u64 value;
-};
-
-#define DECLARE_STATS_COUNTER(nm) \
- static struct __iommu_counter nm = { \
- .name = #nm, \
- }
-
-#define INC_STATS_COUNTER(name) name.value += 1
-#define ADD_STATS_COUNTER(name, x) name.value += (x)
-#define SUB_STATS_COUNTER(name, x) name.value -= (x)
-
-#else /* CONFIG_AMD_IOMMU_STATS */
-
-#define DECLARE_STATS_COUNTER(name)
-#define INC_STATS_COUNTER(name)
-#define ADD_STATS_COUNTER(name, x)
-#define SUB_STATS_COUNTER(name, x)
-
-#endif /* CONFIG_AMD_IOMMU_STATS */
-
#endif /* _ASM_X86_AMD_IOMMU_TYPES_H */
