git: f8ab2f5bae1d - main - LinuxKPI: Add linux/iosys-map.h header
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Date: Sun, 24 Dec 2023 08:23:02 UTC
The branch main has been updated by wulf: URL: https://cgit.FreeBSD.org/src/commit/?id=f8ab2f5bae1d4e4e13f95f4738c9bb49fcda6261 commit f8ab2f5bae1d4e4e13f95f4738c9bb49fcda6261 Author: Vladimir Kondratyev <wulf@FreeBSD.org> AuthorDate: 2023-12-24 08:19:58 +0000 Commit: Vladimir Kondratyev <wulf@FreeBSD.org> CommitDate: 2023-12-24 08:19:58 +0000 LinuxKPI: Add linux/iosys-map.h header Sponsored by: Serenity Cyber Security, LLC Obtained from: OpenBSD MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D42799 --- .../linuxkpi/common/include/linux/iosys-map.h | 161 +++++++++++++++++++++ 1 file changed, 161 insertions(+) diff --git a/sys/compat/linuxkpi/common/include/linux/iosys-map.h b/sys/compat/linuxkpi/common/include/linux/iosys-map.h new file mode 100644 index 000000000000..66c442b8668f --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/iosys-map.h @@ -0,0 +1,161 @@ +/* Public domain. */ + +#ifndef _LINUXKPI_LINUX_IOSYS_MAP_H +#define _LINUXKPI_LINUX_IOSYS_MAP_H + +#include <linux/io.h> +#include <linux/string.h> + +struct iosys_map { + union { + void *vaddr_iomem; + void *vaddr; + }; + bool is_iomem; +#ifdef __OpenBSD__ + bus_space_handle_t bsh; + bus_size_t size; +#endif +}; + +#define IOSYS_MAP_INIT_OFFSET(_ism_src_p, _off) ({ \ + struct iosys_map ism_dst = *(_ism_src_p); \ + iosys_map_incr(&ism_dst, _off); \ + ism_dst; \ +}) + +static inline void +iosys_map_incr(struct iosys_map *ism, size_t n) +{ + if (ism->is_iomem) + ism->vaddr_iomem += n; + else + ism->vaddr += n; +} + +static inline void +iosys_map_memcpy_to(struct iosys_map *ism, size_t off, const void *src, + size_t len) +{ + if (ism->is_iomem) + memcpy_toio(ism->vaddr_iomem + off, src, len); + else + memcpy(ism->vaddr + off, src, len); +} + +static inline bool +iosys_map_is_null(const struct iosys_map *ism) +{ + if (ism->is_iomem) + return (ism->vaddr_iomem == NULL); + else + return (ism->vaddr == NULL); +} + +static inline bool +iosys_map_is_set(const struct iosys_map *ism) +{ + if (ism->is_iomem) + return (ism->vaddr_iomem != NULL); + else + return (ism->vaddr != NULL); +} + +static inline bool +iosys_map_is_equal(const struct iosys_map *ism_a, + const struct iosys_map *ism_b) +{ + if (ism_a->is_iomem != ism_b->is_iomem) + return (false); + + if (ism_a->is_iomem) + return (ism_a->vaddr_iomem == ism_b->vaddr_iomem); + else + return (ism_a->vaddr == ism_b->vaddr); +} + +static inline void +iosys_map_clear(struct iosys_map *ism) +{ + if (ism->is_iomem) { + ism->vaddr_iomem = NULL; + ism->is_iomem = false; + } else { + ism->vaddr = NULL; + } +} + +static inline void +iosys_map_set_vaddr_iomem(struct iosys_map *ism, void *addr) +{ + ism->vaddr_iomem = addr; + ism->is_iomem = true; +} + +static inline void +iosys_map_set_vaddr(struct iosys_map *ism, void *addr) +{ + ism->vaddr = addr; + ism->is_iomem = false; +} + +static inline void +iosys_map_memset(struct iosys_map *ism, size_t off, int value, size_t len) +{ + if (ism->is_iomem) + memset_io(ism->vaddr_iomem + off, value, len); + else + memset(ism->vaddr + off, value, len); +} + +#ifdef __LP64__ +#define _iosys_map_readq(_addr) readq(_addr) +#define _iosys_map_writeq(_val, _addr) writeq(_val, _addr) +#else +#define _iosys_map_readq(_addr) ({ \ + uint64_t val; \ + memcpy_fromio(&val, _addr, sizeof(uint64_t)); \ + val; \ +}) +#define _iosys_map_writeq(_val, _addr) \ + memcpy_toio(_addr, &(_val), sizeof(uint64_t)) +#endif + +#define iosys_map_rd(_ism, _off, _type) ({ \ + _type val; \ + if ((_ism)->is_iomem) { \ + void *addr = (_ism)->vaddr_iomem + (_off); \ + val = _Generic(val, \ + uint8_t : readb(addr), \ + uint16_t: readw(addr), \ + uint32_t: readl(addr), \ + uint64_t: _iosys_map_readq(addr)); \ + } else \ + val = READ_ONCE(*(_type *)((_ism)->vaddr + (_off))); \ + val; \ +}) +#define iosys_map_wr(_ism, _off, _type, _val) ({ \ + _type val = (_val); \ + if ((_ism)->is_iomem) { \ + void *addr = (_ism)->vaddr_iomem + (_off); \ + _Generic(val, \ + uint8_t : writeb(val, addr), \ + uint16_t: writew(val, addr), \ + uint32_t: writel(val, addr), \ + uint64_t: _iosys_map_writeq(val, addr)); \ + } else \ + WRITE_ONCE(*(_type *)((_ism)->vaddr + (_off)), val); \ +}) + +#define iosys_map_rd_field(_ism, _off, _type, _field) ({ \ + _type *s; \ + iosys_map_rd(_ism, (_off) + offsetof(_type, _field), \ + __typeof(s->_field)); \ +}) +#define iosys_map_wr_field(_ism, _off, _type, _field, _val) ({ \ + _type *s; \ + iosys_map_wr(_ism, (_off) + offsetof(_type, _field), \ + __typeof(s->_field), _val); \ +}) + +#endif