diff options
Diffstat (limited to 'arch/s390/include/asm/cio.h')
| -rw-r--r-- | arch/s390/include/asm/cio.h | 99 |
1 files changed, 84 insertions, 15 deletions
diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h index ffb898961c8d..0a82ae2300b6 100644 --- a/arch/s390/include/asm/cio.h +++ b/arch/s390/include/asm/cio.h @@ -1,11 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Common interface for I/O on S/390 */ #ifndef _ASM_S390_CIO_H_ #define _ASM_S390_CIO_H_ -#include <linux/spinlock.h> +#include <linux/bitops.h> +#include <linux/genalloc.h> +#include <asm/dma-types.h> #include <asm/types.h> +#include <asm/tpi.h> #define LPM_ANYPATH 0xff #define __MAX_CSSID 0 @@ -14,6 +18,8 @@ #include <asm/scsw.h> +#define CCW_MAX_BYTE_COUNT 65535 + /** * struct ccw1 - channel command word * @cmd_code: command code @@ -29,9 +35,27 @@ struct ccw1 { __u8 cmd_code; __u8 flags; __u16 count; - __u32 cda; + dma32_t cda; } __attribute__ ((packed,aligned(8))); +/** + * struct ccw0 - channel command word + * @cmd_code: command code + * @cda: data address + * @flags: flags, like IDA addressing, etc. + * @reserved: will be ignored + * @count: byte count + * + * The format-0 ccw structure. + */ +struct ccw0 { + __u8 cmd_code; + __u32 cda : 24; + __u8 flags; + __u8 reserved; + __u16 count; +} __packed __aligned(8); + #define CCW_FLAG_DC 0x80 #define CCW_FLAG_CC 0x40 #define CCW_FLAG_SLI 0x20 @@ -131,8 +155,8 @@ struct sublog { struct esw0 { struct sublog sublog; struct erw erw; - __u32 faddr[2]; - __u32 saddr; + dma32_t faddr[2]; + dma32_t saddr; } __attribute__ ((packed)); /** @@ -199,7 +223,7 @@ struct esw_eadm { /** * struct irb - interruption response block * @scsw: subchannel status word - * @esw: extened status word + * @esw: extended status word * @ecw: extended control word * * The irb that is handed to the device driver when an interrupt occurs. For @@ -207,7 +231,7 @@ struct esw_eadm { * a field is valid; a field not being valid is always passed as %0. * If a unit check occurred, @ecw may contain sense data; this is retrieved * by the common I/O layer itself if the device doesn't support concurrent - * sense (so that the device driver never needs to perform basic sene itself). + * sense (so that the device driver never needs to perform basic sense itself). * For unsolicited interrupts, the irb is passed as-is (expect for sense data, * if applicable). */ @@ -244,6 +268,36 @@ struct ciw { #define CIW_TYPE_RNI 0x2 /* read node identifier */ /* + * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands" + */ + +#define ND_VALIDITY_VALID 0 +#define ND_VALIDITY_OUTDATED 1 +#define ND_VALIDITY_INVALID 2 + +struct node_descriptor { + /* Flags. */ + union { + struct { + u32 validity:3; + u32 reserved:5; + } __packed; + u8 byte0; + } __packed; + + /* Node parameters. */ + u32 params:24; + + /* Node ID. */ + char type[6]; + char model[3]; + char manufacturer[3]; + char plant[2]; + char seq[12]; + u16 tag; +} __packed; + +/* * Flags used as input parameters for do_IO() */ #define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */ @@ -278,7 +332,7 @@ struct ccw_dev_id { }; /** - * ccw_device_id_is_equal() - compare two ccw_dev_ids + * ccw_dev_id_is_equal() - compare two ccw_dev_ids * @dev_id1: a ccw_dev_id * @dev_id2: another ccw_dev_id * Returns: @@ -296,19 +350,34 @@ static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, return 0; } -extern void css_schedule_reprobe(void); +/** + * pathmask_to_pos() - find the position of the left-most bit in a pathmask + * @mask: pathmask with at least one bit set + */ +static inline u8 pathmask_to_pos(u8 mask) +{ + return 8 - ffs(mask); +} -extern void reipl_ccw_dev(struct ccw_dev_id *id); +extern void css_schedule_reprobe(void); -struct cio_iplinfo { - u16 devno; - int is_qdio; -}; +extern void *cio_dma_zalloc(size_t size); +extern void cio_dma_free(void *cpu_addr, size_t size); +extern struct device *cio_get_dma_css_dev(void); -extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo); +void *cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev, + size_t size); +void *__cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev, + size_t size, dma32_t *dma_handle); +void cio_gp_dma_free(struct gen_pool *gp_dma, void *cpu_addr, size_t size); +void cio_gp_dma_destroy(struct gen_pool *gp_dma, struct device *dma_dev); +struct gen_pool *cio_gp_dma_create(struct device *dma_dev, int nr_pages); /* Function from drivers/s390/cio/chsc.c */ -int chsc_sstpc(void *page, unsigned int op, u16 ctrl); +int chsc_sstpc(void *page, unsigned int op, u16 ctrl, long *clock_delta); int chsc_sstpi(void *page, void *result, size_t size); +int chsc_stzi(void *page, void *result, size_t size); +int chsc_sgib(u32 origin); +int chsc_scud(u16 cu, u64 *esm, u8 *esm_valid); #endif |