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Diffstat (limited to 'arch/s390/include/asm/qdio.h')
| -rw-r--r-- | arch/s390/include/asm/qdio.h | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h new file mode 100644 index 000000000..2f983e0b9 --- /dev/null +++ b/arch/s390/include/asm/qdio.h @@ -0,0 +1,364 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp. 2000, 2008 + * Author(s): Utz Bacher <utz.bacher@de.ibm.com> + * Jan Glauber <jang@linux.vnet.ibm.com> + * + */ +#ifndef __QDIO_H__ +#define __QDIO_H__ + +#include <linux/interrupt.h> +#include <asm/cio.h> +#include <asm/ccwdev.h> + +/* only use 4 queues to save some cachelines */ +#define QDIO_MAX_QUEUES_PER_IRQ 4 +#define QDIO_MAX_BUFFERS_PER_Q 128 +#define QDIO_MAX_BUFFERS_MASK (QDIO_MAX_BUFFERS_PER_Q - 1) +#define QDIO_BUFNR(num) ((num) & QDIO_MAX_BUFFERS_MASK) +#define QDIO_MAX_ELEMENTS_PER_BUFFER 16 + +#define QDIO_QETH_QFMT 0 +#define QDIO_ZFCP_QFMT 1 +#define QDIO_IQDIO_QFMT 2 + +/** + * struct qdesfmt0 - queue descriptor, format 0 + * @sliba: absolute address of storage list information block + * @sla: absolute address of storage list + * @slsba: absolute address of storage list state block + * @akey: access key for SLIB + * @bkey: access key for SL + * @ckey: access key for SBALs + * @dkey: access key for SLSB + */ +struct qdesfmt0 { + u64 sliba; + u64 sla; + u64 slsba; + u32 : 32; + u32 akey : 4; + u32 bkey : 4; + u32 ckey : 4; + u32 dkey : 4; + u32 : 16; +} __attribute__ ((packed)); + +#define QDR_AC_MULTI_BUFFER_ENABLE 0x01 + +/** + * struct qdr - queue description record (QDR) + * @qfmt: queue format + * @ac: adapter characteristics + * @iqdcnt: input queue descriptor count + * @oqdcnt: output queue descriptor count + * @iqdsz: input queue descriptor size + * @oqdsz: output queue descriptor size + * @qiba: absolute address of queue information block + * @qkey: queue information block key + * @qdf0: queue descriptions + */ +struct qdr { + u32 qfmt : 8; + u32 : 16; + u32 ac : 8; + u32 : 8; + u32 iqdcnt : 8; + u32 : 8; + u32 oqdcnt : 8; + u32 : 8; + u32 iqdsz : 8; + u32 : 8; + u32 oqdsz : 8; + /* private: */ + u32 res[9]; + /* public: */ + u64 qiba; + u32 : 32; + u32 qkey : 4; + u32 : 28; + struct qdesfmt0 qdf0[126]; +} __packed __aligned(PAGE_SIZE); + +#define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40 +#define QIB_RFLAGS_ENABLE_QEBSM 0x80 +#define QIB_RFLAGS_ENABLE_DATA_DIV 0x02 + +/** + * struct qib - queue information block (QIB) + * @qfmt: queue format + * @pfmt: implementation dependent parameter format + * @rflags: QEBSM + * @ac: adapter characteristics + * @isliba: logical address of first input SLIB + * @osliba: logical address of first output SLIB + * @ebcnam: adapter identifier in EBCDIC + * @parm: implementation dependent parameters + */ +struct qib { + u32 qfmt : 8; + u32 pfmt : 8; + u32 rflags : 8; + u32 ac : 8; + u32 : 32; + u64 isliba; + u64 osliba; + u32 : 32; + u32 : 32; + u8 ebcnam[8]; + /* private: */ + u8 res[88]; + /* public: */ + u8 parm[128]; +} __attribute__ ((packed, aligned(256))); + +/** + * struct slibe - storage list information block element (SLIBE) + * @parms: implementation dependent parameters + */ +struct slibe { + u64 parms; +}; + +/** + * struct qaob - queue asynchronous operation block + * @res0: reserved parameters + * @res1: reserved parameter + * @res2: reserved parameter + * @res3: reserved parameter + * @aorc: asynchronous operation return code + * @flags: internal flags + * @cbtbs: control block type + * @sb_count: number of storage blocks + * @sba: storage block element addresses + * @dcount: size of storage block elements + * @user0: user definable value + * @res4: reserved parameter + * @user1: user definable value + */ +struct qaob { + u64 res0[6]; + u8 res1; + u8 res2; + u8 res3; + u8 aorc; + u8 flags; + u16 cbtbs; + u8 sb_count; + u64 sba[QDIO_MAX_ELEMENTS_PER_BUFFER]; + u16 dcount[QDIO_MAX_ELEMENTS_PER_BUFFER]; + u64 user0; + u64 res4[2]; + u8 user1[16]; +} __attribute__ ((packed, aligned(256))); + +/** + * struct slib - storage list information block (SLIB) + * @nsliba: next SLIB address (if any) + * @sla: SL address + * @slsba: SLSB address + * @slibe: SLIB elements + */ +struct slib { + u64 nsliba; + u64 sla; + u64 slsba; + /* private: */ + u8 res[1000]; + /* public: */ + struct slibe slibe[QDIO_MAX_BUFFERS_PER_Q]; +} __attribute__ ((packed, aligned(2048))); + +#define SBAL_EFLAGS_LAST_ENTRY 0x40 +#define SBAL_EFLAGS_CONTIGUOUS 0x20 +#define SBAL_EFLAGS_FIRST_FRAG 0x04 +#define SBAL_EFLAGS_MIDDLE_FRAG 0x08 +#define SBAL_EFLAGS_LAST_FRAG 0x0c +#define SBAL_EFLAGS_MASK 0x6f + +#define SBAL_SFLAGS0_PCI_REQ 0x40 +#define SBAL_SFLAGS0_DATA_CONTINUATION 0x20 + +/* Awesome OpenFCP extensions */ +#define SBAL_SFLAGS0_TYPE_STATUS 0x00 +#define SBAL_SFLAGS0_TYPE_WRITE 0x08 +#define SBAL_SFLAGS0_TYPE_READ 0x10 +#define SBAL_SFLAGS0_TYPE_WRITE_READ 0x18 +#define SBAL_SFLAGS0_MORE_SBALS 0x04 +#define SBAL_SFLAGS0_COMMAND 0x02 +#define SBAL_SFLAGS0_LAST_SBAL 0x00 +#define SBAL_SFLAGS0_ONLY_SBAL SBAL_SFLAGS0_COMMAND +#define SBAL_SFLAGS0_MIDDLE_SBAL SBAL_SFLAGS0_MORE_SBALS +#define SBAL_SFLAGS0_FIRST_SBAL (SBAL_SFLAGS0_MORE_SBALS | SBAL_SFLAGS0_COMMAND) + +/** + * struct qdio_buffer_element - SBAL entry + * @eflags: SBAL entry flags + * @scount: SBAL count + * @sflags: whole SBAL flags + * @length: length + * @addr: absolute data address +*/ +struct qdio_buffer_element { + u8 eflags; + /* private: */ + u8 res1; + /* public: */ + u8 scount; + u8 sflags; + u32 length; + u64 addr; +} __attribute__ ((packed, aligned(16))); + +/** + * struct qdio_buffer - storage block address list (SBAL) + * @element: SBAL entries + */ +struct qdio_buffer { + struct qdio_buffer_element element[QDIO_MAX_ELEMENTS_PER_BUFFER]; +} __attribute__ ((packed, aligned(256))); + +/** + * struct sl_element - storage list entry + * @sbal: absolute SBAL address + */ +struct sl_element { + u64 sbal; +} __attribute__ ((packed)); + +/** + * struct sl - storage list (SL) + * @element: SL entries + */ +struct sl { + struct sl_element element[QDIO_MAX_BUFFERS_PER_Q]; +} __attribute__ ((packed, aligned(1024))); + +/** + * struct slsb - storage list state block (SLSB) + * @val: state per buffer + */ +struct slsb { + u8 val[QDIO_MAX_BUFFERS_PER_Q]; +} __attribute__ ((packed, aligned(256))); + +/* qdio adapter-characteristics-1 flag */ +#define CHSC_AC1_INITIATE_INPUTQ 0x80 +#define AC1_SIGA_INPUT_NEEDED 0x40 /* process input queues */ +#define AC1_SIGA_OUTPUT_NEEDED 0x20 /* process output queues */ +#define AC1_SIGA_SYNC_NEEDED 0x10 /* ask hypervisor to sync */ +#define AC1_AUTOMATIC_SYNC_ON_THININT 0x08 /* set by hypervisor */ +#define AC1_AUTOMATIC_SYNC_ON_OUT_PCI 0x04 /* set by hypervisor */ +#define AC1_SC_QEBSM_AVAILABLE 0x02 /* available for subchannel */ +#define AC1_SC_QEBSM_ENABLED 0x01 /* enabled for subchannel */ + +#define CHSC_AC2_MULTI_BUFFER_AVAILABLE 0x0080 +#define CHSC_AC2_MULTI_BUFFER_ENABLED 0x0040 +#define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 +#define CHSC_AC2_SNIFFER_AVAILABLE 0x0008 +#define CHSC_AC2_DATA_DIV_ENABLED 0x0002 + +#define CHSC_AC3_FORMAT2_CQ_AVAILABLE 0x8000 + +struct qdio_ssqd_desc { + u8 flags; + u8:8; + u16 sch; + u8 qfmt; + u8 parm; + u8 qdioac1; + u8 sch_class; + u8 pcnt; + u8 icnt; + u8:8; + u8 ocnt; + u8:8; + u8 mbccnt; + u16 qdioac2; + u64 sch_token; + u8 mro; + u8 mri; + u16 qdioac3; + u16:16; + u8:8; + u8 mmwc; +} __attribute__ ((packed)); + +/* params are: ccw_device, qdio_error, queue_number, + first element processed, number of elements processed, int_parm */ +typedef void qdio_handler_t(struct ccw_device *, unsigned int, int, + int, int, unsigned long); + +/* qdio errors reported through the queue handlers: */ +#define QDIO_ERROR_ACTIVATE 0x0001 +#define QDIO_ERROR_GET_BUF_STATE 0x0002 +#define QDIO_ERROR_SET_BUF_STATE 0x0004 + +/* extra info for completed SBALs: */ +#define QDIO_ERROR_SLSB_STATE 0x0100 +#define QDIO_ERROR_SLSB_PENDING 0x0200 + +/* for qdio_cleanup */ +#define QDIO_FLAG_CLEANUP_USING_CLEAR 0x01 +#define QDIO_FLAG_CLEANUP_USING_HALT 0x02 + +/** + * struct qdio_initialize - qdio initialization data + * @q_format: queue format + * @qdr_ac: feature flags to set + * @qib_param_field_format: format for qib_parm_field + * @qib_param_field: pointer to 128 bytes or NULL, if no param field + * @qib_rflags: rflags to set + * @no_input_qs: number of input queues + * @no_output_qs: number of output queues + * @input_handler: handler to be called for input queues, and device-wide errors + * @output_handler: handler to be called for output queues + * @irq_poll: Data IRQ polling handler + * @scan_threshold: # of in-use buffers that triggers scan on output queue + * @int_parm: interruption parameter + * @input_sbal_addr_array: per-queue array, each element points to 128 SBALs + * @output_sbal_addr_array: per-queue array, each element points to 128 SBALs + */ +struct qdio_initialize { + unsigned char q_format; + unsigned char qdr_ac; + unsigned int qib_param_field_format; + unsigned char *qib_param_field; + unsigned char qib_rflags; + unsigned int no_input_qs; + unsigned int no_output_qs; + qdio_handler_t *input_handler; + qdio_handler_t *output_handler; + void (*irq_poll)(struct ccw_device *cdev, unsigned long data); + unsigned long int_parm; + struct qdio_buffer ***input_sbal_addr_array; + struct qdio_buffer ***output_sbal_addr_array; +}; + +int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count); +void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count); +void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count); + +extern int qdio_allocate(struct ccw_device *cdev, unsigned int no_input_qs, + unsigned int no_output_qs); +extern int qdio_establish(struct ccw_device *cdev, + struct qdio_initialize *init_data); +extern int qdio_activate(struct ccw_device *); +extern int qdio_start_irq(struct ccw_device *cdev); +extern int qdio_stop_irq(struct ccw_device *cdev); +extern int qdio_inspect_input_queue(struct ccw_device *cdev, unsigned int nr, + unsigned int *bufnr, unsigned int *error); +extern int qdio_inspect_output_queue(struct ccw_device *cdev, unsigned int nr, + unsigned int *bufnr, unsigned int *error); +extern int qdio_add_bufs_to_input_queue(struct ccw_device *cdev, + unsigned int q_nr, unsigned int bufnr, + unsigned int count); +extern int qdio_add_bufs_to_output_queue(struct ccw_device *cdev, + unsigned int q_nr, unsigned int bufnr, + unsigned int count, struct qaob *aob); +extern int qdio_shutdown(struct ccw_device *, int); +extern int qdio_free(struct ccw_device *); +extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *); + +#endif /* __QDIO_H__ */ |