From 104ea556ee7f40039c9c635d0c267b1fde084a81 Mon Sep 17 00:00:00 2001 From: "frank.blaschka@de.ibm.com" Date: Mon, 8 Aug 2011 01:33:55 +0000 Subject: qdio: support asynchronous delivery of storage blocks This patch introduces support for asynchronous delivery of storage blocks for Hipersockets. Upper layers may exploit this functionality to reuse SBALs for which the delivery status is still pending. Signed-off-by: Einar Lueck Signed-off-by: Jan Glauber Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- arch/s390/include/asm/qdio.h | 68 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 65 insertions(+), 3 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h index 15c97625df8..3881e9499e1 100644 --- a/arch/s390/include/asm/qdio.h +++ b/arch/s390/include/asm/qdio.h @@ -122,6 +122,40 @@ 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 defineable value + * @res4: reserved paramater + * @user1: user defineable value + * @user2: user defineable 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]; + u64 user1; + u64 user2; +} __attribute__ ((packed, aligned(256))); + /** * struct slib - storage list information block (SLIB) * @nsliba: next SLIB address (if any) @@ -225,6 +259,31 @@ struct slsb { #define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 #define CHSC_AC2_DATA_DIV_ENABLED 0x0002 +/** + * struct qdio_outbuf_state - SBAL related asynchronous operation information + * (for communication with upper layer programs) + * (only required for use with completion queues) + * @flags: flags indicating state of buffer + * @aob: pointer to QAOB used for the particular SBAL + * @user: pointer to upper layer program's state information related to SBAL + * (stored in user1 data of QAOB) + */ +struct qdio_outbuf_state { + u8 flags; + struct qaob *aob; + void *user; +}; + +#define QDIO_OUTBUF_STATE_FLAG_NONE 0x00 +#define QDIO_OUTBUF_STATE_FLAG_PENDING 0x01 + +#define CHSC_AC1_INITIATE_INPUTQ 0x80 + +#define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010 +#define CHSC_AC2_DATA_DIV_ENABLED 0x0002 + +#define CHSC_AC3_FORMAT2_CQ_AVAILABLE 0x8000 + struct qdio_ssqd_desc { u8 flags; u8:8; @@ -243,8 +302,7 @@ struct qdio_ssqd_desc { u64 sch_token; u8 mro; u8 mri; - u8:8; - u8 sbalic; + u16 qdioac3; u16:16; u8:8; u8 mmwc; @@ -280,9 +338,11 @@ typedef void qdio_handler_t(struct ccw_device *, unsigned int, int, * @no_output_qs: number of output queues * @input_handler: handler to be called for input queues * @output_handler: handler to be called for output queues + * @queue_start_poll: polling handlers (one per input queue or NULL) * @int_parm: interruption parameter * @input_sbal_addr_array: address of no_input_qs * 128 pointers * @output_sbal_addr_array: address of no_output_qs * 128 pointers + * @output_sbal_state_array: no_output_qs * 128 state info (for CQ or NULL) */ struct qdio_initialize { struct ccw_device *cdev; @@ -297,11 +357,12 @@ struct qdio_initialize { unsigned int no_output_qs; qdio_handler_t *input_handler; qdio_handler_t *output_handler; - void (*queue_start_poll) (struct ccw_device *, int, unsigned long); + void (**queue_start_poll) (struct ccw_device *, int, unsigned long); int scan_threshold; unsigned long int_parm; void **input_sbal_addr_array; void **output_sbal_addr_array; + struct qdio_outbuf_state *output_sbal_state_array; }; #define QDIO_STATE_INACTIVE 0x00000002 /* after qdio_cleanup */ @@ -316,6 +377,7 @@ struct qdio_initialize { extern int qdio_allocate(struct qdio_initialize *); extern int qdio_establish(struct qdio_initialize *); extern int qdio_activate(struct ccw_device *); +extern void qdio_release_aob(struct qaob *); extern int do_QDIO(struct ccw_device *, unsigned int, int, unsigned int, unsigned int); extern int qdio_start_irq(struct ccw_device *, int); -- cgit v1.2.3-70-g09d2 From 9cb7284f3058d272758ebaaa8f6f924cb99792bc Mon Sep 17 00:00:00 2001 From: "frank.blaschka@de.ibm.com" Date: Mon, 8 Aug 2011 01:33:56 +0000 Subject: qdio: support forced signal adapter indications This patch ensures that signal adapter commands are issued if they are indicated to be required. Signed-off-by: Einar Lueck Signed-off-by: Jan Glauber Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- arch/s390/include/asm/qdio.h | 10 ++++++++++ drivers/s390/cio/qdio.h | 9 --------- drivers/s390/cio/qdio_main.c | 5 +---- 3 files changed, 11 insertions(+), 13 deletions(-) (limited to 'arch/s390') diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h index 3881e9499e1..21993623da9 100644 --- a/arch/s390/include/asm/qdio.h +++ b/arch/s390/include/asm/qdio.h @@ -279,6 +279,16 @@ struct qdio_outbuf_state { #define CHSC_AC1_INITIATE_INPUTQ 0x80 + +/* qdio adapter-characteristics-1 flag */ +#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_DATA_DIV_AVAILABLE 0x0010 #define CHSC_AC2_DATA_DIV_ENABLED 0x0002 diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index 2b21f65a895..3dd86441da3 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -87,15 +87,6 @@ enum qdio_irq_states { #define CHSC_FLAG_QDIO_CAPABILITY 0x80 #define CHSC_FLAG_VALIDITY 0x40 -/* qdio adapter-characteristics-1 flag */ -#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 */ - /* SIGA flags */ #define QDIO_SIGA_WRITE 0x00 #define QDIO_SIGA_READ 0x01 diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index a7153f2f3af..9a122280246 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -1592,12 +1592,9 @@ set: used = atomic_add_return(count, &q->nr_buf_used) - count; BUG_ON(used + count > QDIO_MAX_BUFFERS_PER_Q); - /* no need to signal as long as the adapter had free buffers */ - if (used) - return 0; - if (need_siga_in(q)) return qdio_siga_input(q); + return 0; } -- cgit v1.2.3-70-g09d2