qdio: support asynchronous delivery of storage blocks

[pandora-kernel.git] / drivers / s390 / cio / qdio.h

diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 7bc643f..2b21f65 100644 (file)
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -14,6 +14,8 @@
 #include "chsc.h"
 
 #define QDIO_BUSY_BIT_PATIENCE         (100 << 12)     /* 100 microseconds */
+#define QDIO_BUSY_BIT_RETRY_DELAY      10              /* 10 milliseconds */
+#define QDIO_BUSY_BIT_RETRIES          1000            /* = 10s retry time */
 #define QDIO_INPUT_THRESHOLD           (500 << 12)     /* 500 microseconds */
 
 /*
@@ -42,6 +44,7 @@ enum qdio_irq_states {
 #define SLSB_STATE_NOT_INIT    0x0
 #define SLSB_STATE_EMPTY       0x1
 #define SLSB_STATE_PRIMED      0x2
+#define SLSB_STATE_PENDING     0x3
 #define SLSB_STATE_HALTED      0xe
 #define SLSB_STATE_ERROR       0xf
 #define SLSB_TYPE_INPUT                0x0
@@ -65,6 +68,8 @@ enum qdio_irq_states {
        (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_NOT_INIT) /* 0xa0 */
 #define SLSB_P_OUTPUT_EMPTY    \
        (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_EMPTY)    /* 0xa1 */
+#define SLSB_P_OUTPUT_PENDING \
+       (SLSB_OWNER_PROG | SLSB_TYPE_OUTPUT | SLSB_STATE_PENDING)  /* 0xa3 */
 #define SLSB_CU_OUTPUT_PRIMED  \
        (SLSB_OWNER_CU | SLSB_TYPE_OUTPUT | SLSB_STATE_PRIMED)     /* 0x62 */
 #define SLSB_P_OUTPUT_HALTED   \
@@ -95,6 +100,7 @@ enum qdio_irq_states {
 #define QDIO_SIGA_WRITE                0x00
 #define QDIO_SIGA_READ         0x01
 #define QDIO_SIGA_SYNC         0x02
+#define QDIO_SIGA_WRITEQ       0x04
 #define QDIO_SIGA_QEBSM_FLAG   0x80
 
 #ifdef CONFIG_64BIT
@@ -251,6 +257,12 @@ struct qdio_input_q {
 struct qdio_output_q {
        /* PCIs are enabled for the queue */
        int pci_out_enabled;
+       /* cq: use asynchronous output buffers */
+       int use_cq;
+       /* cq: aobs used for particual SBAL */
+       struct qaob **aobs;
+       /* cq: sbal state related to asynchronous operation */
+       struct qdio_outbuf_state *sbal_state;
        /* timer to check for more outbound work */
        struct timer_list timer;
        /* used SBALs before tasklet schedule */
@@ -430,9 +442,20 @@ struct indicator_t {
 
 extern struct indicator_t *q_indicators;
 
-static inline int shared_ind(u32 *dsci)
+static inline int has_multiple_inq_on_dsci(struct qdio_irq *irq)
 {
-       return dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
+       return irq->nr_input_qs > 1;
+}
+
+static inline int references_shared_dsci(struct qdio_irq *irq)
+{
+       return irq->dsci == &q_indicators[TIQDIO_SHARED_IND].ind;
+}
+
+static inline int shared_ind(struct qdio_q *q)
+{
+       struct qdio_irq *i = q->irq_ptr;
+       return references_shared_dsci(i) || has_multiple_inq_on_dsci(i);
 }
 
 /* prototypes for thin interrupt */
@@ -447,6 +470,7 @@ void tiqdio_free_memory(void);
 int tiqdio_register_thinints(void);
 void tiqdio_unregister_thinints(void);
 
+
 /* prototypes for setup */
 void qdio_inbound_processing(unsigned long data);
 void qdio_outbound_processing(unsigned long data);
@@ -467,6 +491,9 @@ int qdio_setup_create_sysfs(struct ccw_device *cdev);
 void qdio_setup_destroy_sysfs(struct ccw_device *cdev);
 int qdio_setup_init(void);
 void qdio_setup_exit(void);
+int qdio_enable_async_operation(struct qdio_output_q *q);
+void qdio_disable_async_operation(struct qdio_output_q *q);
+struct qaob *qdio_allocate_aob(void);
 
 int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
                        unsigned char *state);