diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c index 4abb6c74a9388836d82b6b8983040e2b28cf1428..e45350cb6ac8356f9bbc161344a5875a976f430b 100644 --- a/drivers/acpi/apei/apei-base.c +++ b/drivers/acpi/apei/apei-base.c @@ -34,13 +34,13 @@ #include #include #include +#include #include #include #include #include #include #include -#include #include "apei-internal.h" @@ -70,7 +70,7 @@ int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val) { int rc; - rc = acpi_atomic_read(val, &entry->register_region); + rc = apei_read(val, &entry->register_region); if (rc) return rc; *val >>= entry->register_region.bit_offset; @@ -116,13 +116,13 @@ int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val) val <<= entry->register_region.bit_offset; if (entry->flags & APEI_EXEC_PRESERVE_REGISTER) { u64 valr = 0; - rc = acpi_atomic_read(&valr, &entry->register_region); + rc = apei_read(&valr, &entry->register_region); if (rc) return rc; valr &= ~(entry->mask << entry->register_region.bit_offset); val |= valr; } - rc = acpi_atomic_write(val, &entry->register_region); + rc = apei_write(val, &entry->register_region); return rc; } @@ -243,7 +243,7 @@ static int pre_map_gar_callback(struct apei_exec_context *ctx, u8 ins = entry->instruction; if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER) - return acpi_pre_map_gar(&entry->register_region); + return acpi_os_map_generic_address(&entry->register_region); return 0; } @@ -276,7 +276,7 @@ static int post_unmap_gar_callback(struct apei_exec_context *ctx, u8 ins = entry->instruction; if (ctx->ins_table[ins].flags & APEI_EXEC_INS_ACCESS_REGISTER) - acpi_post_unmap_gar(&entry->register_region); + acpi_os_unmap_generic_address(&entry->register_region); return 0; } @@ -591,6 +591,96 @@ static int apei_check_gar(struct acpi_generic_address *reg, u64 *paddr) return 0; } +/* read GAR in interrupt (including NMI) or process context */ +int apei_read(u64 *val, struct acpi_generic_address *reg) +{ + int rc; + u64 address; + u32 tmp, width = reg->bit_width; + acpi_status status; + + rc = apei_check_gar(reg, &address); + if (rc) + return rc; + + if (width == 64) + width = 32; /* Break into two 32-bit transfers */ + + *val = 0; + switch(reg->space_id) { + case ACPI_ADR_SPACE_SYSTEM_MEMORY: + status = acpi_os_read_memory((acpi_physical_address) + address, &tmp, width); + if (ACPI_FAILURE(status)) + return -EIO; + *val = tmp; + + if (reg->bit_width == 64) { + /* Read the top 32 bits */ + status = acpi_os_read_memory((acpi_physical_address) + (address + 4), &tmp, 32); + if (ACPI_FAILURE(status)) + return -EIO; + *val |= ((u64)tmp << 32); + } + break; + case ACPI_ADR_SPACE_SYSTEM_IO: + status = acpi_os_read_port(address, (u32 *)val, reg->bit_width); + if (ACPI_FAILURE(status)) + return -EIO; + break; + default: + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(apei_read); + +/* write GAR in interrupt (including NMI) or process context */ +int apei_write(u64 val, struct acpi_generic_address *reg) +{ + int rc; + u64 address; + u32 width = reg->bit_width; + acpi_status status; + + rc = apei_check_gar(reg, &address); + if (rc) + return rc; + + if (width == 64) + width = 32; /* Break into two 32-bit transfers */ + + switch (reg->space_id) { + case ACPI_ADR_SPACE_SYSTEM_MEMORY: + status = acpi_os_write_memory((acpi_physical_address) + address, ACPI_LODWORD(val), + width); + if (ACPI_FAILURE(status)) + return -EIO; + + if (reg->bit_width == 64) { + status = acpi_os_write_memory((acpi_physical_address) + (address + 4), + ACPI_HIDWORD(val), 32); + if (ACPI_FAILURE(status)) + return -EIO; + } + break; + case ACPI_ADR_SPACE_SYSTEM_IO: + status = acpi_os_write_port(address, val, reg->bit_width); + if (ACPI_FAILURE(status)) + return -EIO; + break; + default: + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(apei_write); + static int collect_res_callback(struct apei_exec_context *ctx, struct acpi_whea_header *entry, void *data) diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h index d778edd34fbaec85ba0e24f0710eefaf44c543c2..cca240a33038fe148ca5e9324214ba988c62c6c2 100644 --- a/drivers/acpi/apei/apei-internal.h +++ b/drivers/acpi/apei/apei-internal.h @@ -68,6 +68,9 @@ static inline int apei_exec_run_optional(struct apei_exec_context *ctx, u8 actio /* IP has been set in instruction function */ #define APEI_EXEC_SET_IP 1 +int apei_read(u64 *val, struct acpi_generic_address *reg); +int apei_write(u64 val, struct acpi_generic_address *reg); + int __apei_exec_read_register(struct acpi_whea_header *entry, u64 *val); int __apei_exec_write_register(struct acpi_whea_header *entry, u64 val); int apei_exec_read_register(struct apei_exec_context *ctx, diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index aaf36090de1e242ce96d5df4e990d7c842f43c05..b3207e16670e5a231ae6d0c72ee226f2415a8efc 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include #include @@ -48,7 +49,6 @@ #include #include #include -#include #include #include #include @@ -301,7 +301,7 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic) if (!ghes) return ERR_PTR(-ENOMEM); ghes->generic = generic; - rc = acpi_pre_map_gar(&generic->error_status_address); + rc = acpi_os_map_generic_address(&generic->error_status_address); if (rc) goto err_free; error_block_length = generic->error_block_length; @@ -321,7 +321,7 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic) return ghes; err_unmap: - acpi_post_unmap_gar(&generic->error_status_address); + acpi_os_unmap_generic_address(&generic->error_status_address); err_free: kfree(ghes); return ERR_PTR(rc); @@ -330,7 +330,7 @@ static struct ghes *ghes_new(struct acpi_hest_generic *generic) static void ghes_fini(struct ghes *ghes) { kfree(ghes->estatus); - acpi_post_unmap_gar(&ghes->generic->error_status_address); + acpi_os_unmap_generic_address(&ghes->generic->error_status_address); } enum { @@ -401,7 +401,7 @@ static int ghes_read_estatus(struct ghes *ghes, int silent) u32 len; int rc; - rc = acpi_atomic_read(&buf_paddr, &g->error_status_address); + rc = apei_read(&buf_paddr, &g->error_status_address); if (rc) { if (!silent && printk_ratelimit()) pr_warning(FW_WARN GHES_PFX