iommu-helper: use bitmap library
Use bitmap library and kill some unused iommu helper functions.
1. s/iommu_area_free/bitmap_clear/
2. s/iommu_area_reserve/bitmap_set/
3. Use bitmap_find_next_zero_area instead of find_next_zero_area
This cannot be simple substitution because find_next_zero_area
doesn't check the last bit of the limit in bitmap
4. Remove iommu_area_free, iommu_area_reserve, and find_next_zero_area
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index b990b5c..23824fe 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -19,7 +19,7 @@
#include <linux/pci.h>
#include <linux/gfp.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
#include <linux/debugfs.h>
#include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
@@ -1162,7 +1162,7 @@
address = (address % APERTURE_RANGE_SIZE) >> PAGE_SHIFT;
- iommu_area_free(range->bitmap, address, pages);
+ bitmap_clear(range->bitmap, address, pages);
}
diff --git a/arch/x86/kernel/pci-calgary_64.c b/arch/x86/kernel/pci-calgary_64.c
index c563e4c..2bbde60 100644
--- a/arch/x86/kernel/pci-calgary_64.c
+++ b/arch/x86/kernel/pci-calgary_64.c
@@ -31,7 +31,7 @@
#include <linux/string.h>
#include <linux/crash_dump.h>
#include <linux/dma-mapping.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
#include <linux/pci_ids.h>
#include <linux/pci.h>
#include <linux/delay.h>
@@ -212,7 +212,7 @@
spin_lock_irqsave(&tbl->it_lock, flags);
- iommu_area_reserve(tbl->it_map, index, npages);
+ bitmap_set(tbl->it_map, index, npages);
spin_unlock_irqrestore(&tbl->it_lock, flags);
}
@@ -303,7 +303,7 @@
spin_lock_irqsave(&tbl->it_lock, flags);
- iommu_area_free(tbl->it_map, entry, npages);
+ bitmap_clear(tbl->it_map, entry, npages);
spin_unlock_irqrestore(&tbl->it_lock, flags);
}
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index 56c0e73..34de53b 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -23,7 +23,7 @@
#include <linux/module.h>
#include <linux/topology.h>
#include <linux/interrupt.h>
-#include <linux/bitops.h>
+#include <linux/bitmap.h>
#include <linux/kdebug.h>
#include <linux/scatterlist.h>
#include <linux/iommu-helper.h>
@@ -126,7 +126,7 @@
unsigned long flags;
spin_lock_irqsave(&iommu_bitmap_lock, flags);
- iommu_area_free(iommu_gart_bitmap, offset, size);
+ bitmap_clear(iommu_gart_bitmap, offset, size);
if (offset >= next_bit)
next_bit = offset + size;
spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
@@ -792,7 +792,7 @@
* Out of IOMMU space handling.
* Reserve some invalid pages at the beginning of the GART.
*/
- iommu_area_reserve(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
+ bitmap_set(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
pr_info("PCI-DMA: Reserving %luMB of IOMMU area in the AGP aperture\n",
iommu_size >> 20);