From 10ebd8556b7990499c896a550e3d416b444211e6 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 02:23:07 +0000
Subject: [PATCH] add led
---
kernel/include/linux/swiotlb.h | 108 ++++++++++++++++++++++--------------------------------
1 files changed, 44 insertions(+), 64 deletions(-)
diff --git a/kernel/include/linux/swiotlb.h b/kernel/include/linux/swiotlb.h
index 965be92..5d2dbe7 100644
--- a/kernel/include/linux/swiotlb.h
+++ b/kernel/include/linux/swiotlb.h
@@ -5,6 +5,7 @@
#include <linux/dma-direction.h>
#include <linux/init.h>
#include <linux/types.h>
+#include <linux/limits.h>
struct device;
struct page;
@@ -15,8 +16,6 @@
SWIOTLB_FORCE, /* swiotlb=force */
SWIOTLB_NO_FORCE, /* swiotlb=noforce */
};
-
-extern enum swiotlb_force swiotlb_force;
/*
* Maximum allowable number of contiguous slabs to map,
@@ -30,12 +29,14 @@
* controllable.
*/
#define IO_TLB_SHIFT 11
+#define IO_TLB_SIZE (1 << IO_TLB_SHIFT)
extern void swiotlb_init(int verbose);
int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
extern unsigned long swiotlb_nr_tbl(void);
unsigned long swiotlb_size_or_default(void);
extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);
+extern int swiotlb_late_init_with_default_size(size_t default_size);
extern void __init swiotlb_update_mem_attributes(void);
/*
@@ -46,18 +47,15 @@
SYNC_FOR_DEVICE = 1,
};
-/* define the last possible byte of physical address space as a mapping error */
-#define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0)
-
-extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
- dma_addr_t tbl_dma_addr,
- phys_addr_t phys, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs);
+phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys,
+ size_t mapping_size, size_t alloc_size,
+ enum dma_data_direction dir, unsigned long attrs);
extern void swiotlb_tbl_unmap_single(struct device *hwdev,
phys_addr_t tlb_addr,
- size_t size, enum dma_data_direction dir,
+ size_t mapping_size,
+ size_t alloc_size,
+ enum dma_data_direction dir,
unsigned long attrs);
extern void swiotlb_tbl_sync_single(struct device *hwdev,
@@ -65,65 +63,47 @@
size_t size, enum dma_data_direction dir,
enum dma_sync_target target);
-/* Accessory functions. */
-
-void *swiotlb_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle,
- gfp_t flags, unsigned long attrs);
-void swiotlb_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_addr, unsigned long attrs);
-
-extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs);
-extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir,
- unsigned long attrs);
-
-extern int
-swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
- enum dma_data_direction dir,
- unsigned long attrs);
-
-extern void
-swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
- int nelems, enum dma_data_direction dir,
- unsigned long attrs);
-
-extern void
-swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir);
-
-extern void
-swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
- int nelems, enum dma_data_direction dir);
-
-extern void
-swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, enum dma_data_direction dir);
-
-extern void
-swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
- int nelems, enum dma_data_direction dir);
-
-extern int
-swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);
-
-extern int
-swiotlb_dma_supported(struct device *hwdev, u64 mask);
+dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys,
+ size_t size, enum dma_data_direction dir, unsigned long attrs);
#ifdef CONFIG_SWIOTLB
-extern void __init swiotlb_exit(void);
+extern enum swiotlb_force swiotlb_force;
+extern phys_addr_t io_tlb_start, io_tlb_end;
+
+static inline bool is_swiotlb_buffer(phys_addr_t paddr)
+{
+ return paddr >= io_tlb_start && paddr < io_tlb_end;
+}
+
+void __init swiotlb_exit(void);
unsigned int swiotlb_max_segment(void);
+size_t swiotlb_max_mapping_size(struct device *dev);
+bool is_swiotlb_active(void);
#else
-static inline void swiotlb_exit(void) { }
-static inline unsigned int swiotlb_max_segment(void) { return 0; }
-#endif
+#define swiotlb_force SWIOTLB_NO_FORCE
+static inline bool is_swiotlb_buffer(phys_addr_t paddr)
+{
+ return false;
+}
+static inline void swiotlb_exit(void)
+{
+}
+static inline unsigned int swiotlb_max_segment(void)
+{
+ return 0;
+}
+static inline size_t swiotlb_max_mapping_size(struct device *dev)
+{
+ return SIZE_MAX;
+}
+
+static inline bool is_swiotlb_active(void)
+{
+ return false;
+}
+#endif /* CONFIG_SWIOTLB */
extern void swiotlb_print_info(void);
-extern int is_swiotlb_buffer(phys_addr_t paddr);
extern void swiotlb_set_max_segment(unsigned int);
-
-extern const struct dma_map_ops swiotlb_dma_ops;
#endif /* __LINUX_SWIOTLB_H */
--
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