diff options
Diffstat (limited to 'drivers/s390/cio/qdio_main.c')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 700 |
1 files changed, 444 insertions, 256 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index 5fcfa7f9e9e..848e3b64ea6 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -1,9 +1,7 @@ /* - * linux/drivers/s390/cio/qdio_main.c - * * Linux for s390 qdio support, buffer handling, qdio API and module support. * - * Copyright 2000,2008 IBM Corp. + * Copyright IBM Corp. 2000, 2008 * Author(s): Utz Bacher <utz.bacher@de.ibm.com> * Jan Glauber <jang@linux.vnet.ibm.com> * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com> @@ -14,9 +12,11 @@ #include <linux/timer.h> #include <linux/delay.h> #include <linux/gfp.h> -#include <asm/atomic.h> +#include <linux/io.h> +#include <linux/atomic.h> #include <asm/debug.h> #include <asm/qdio.h> +#include <asm/ipl.h> #include "cio.h" #include "css.h" @@ -29,11 +29,12 @@ MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\ MODULE_DESCRIPTION("QDIO base support"); MODULE_LICENSE("GPL"); -static inline int do_siga_sync(struct subchannel_id schid, - unsigned int out_mask, unsigned int in_mask) +static inline int do_siga_sync(unsigned long schid, + unsigned int out_mask, unsigned int in_mask, + unsigned int fc) { - register unsigned long __fc asm ("0") = 2; - register struct subchannel_id __schid asm ("1") = schid; + register unsigned long __fc asm ("0") = fc; + register unsigned long __schid asm ("1") = schid; register unsigned long out asm ("2") = out_mask; register unsigned long in asm ("3") = in_mask; int cc; @@ -47,10 +48,11 @@ static inline int do_siga_sync(struct subchannel_id schid, return cc; } -static inline int do_siga_input(struct subchannel_id schid, unsigned int mask) +static inline int do_siga_input(unsigned long schid, unsigned int mask, + unsigned int fc) { - register unsigned long __fc asm ("0") = 1; - register struct subchannel_id __schid asm ("1") = schid; + register unsigned long __fc asm ("0") = fc; + register unsigned long __schid asm ("1") = schid; register unsigned long __mask asm ("2") = mask; int cc; @@ -59,7 +61,7 @@ static inline int do_siga_input(struct subchannel_id schid, unsigned int mask) " ipm %0\n" " srl %0,28\n" : "=d" (cc) - : "d" (__fc), "d" (__schid), "d" (__mask) : "cc", "memory"); + : "d" (__fc), "d" (__schid), "d" (__mask) : "cc"); return cc; } @@ -70,26 +72,27 @@ static inline int do_siga_input(struct subchannel_id schid, unsigned int mask) * @bb: busy bit indicator, set only if SIGA-w/wt could not access a buffer * @fc: function code to perform * - * Returns cc or QDIO_ERROR_SIGA_ACCESS_EXCEPTION. + * Returns condition code. * Note: For IQDC unicast queues only the highest priority queue is processed. */ static inline int do_siga_output(unsigned long schid, unsigned long mask, - unsigned int *bb, unsigned int fc) + unsigned int *bb, unsigned int fc, + unsigned long aob) { register unsigned long __fc asm("0") = fc; register unsigned long __schid asm("1") = schid; register unsigned long __mask asm("2") = mask; - int cc = QDIO_ERROR_SIGA_ACCESS_EXCEPTION; + register unsigned long __aob asm("3") = aob; + int cc; asm volatile( " siga 0\n" - "0: ipm %0\n" + " ipm %0\n" " srl %0,28\n" - "1:\n" - EX_TABLE(0b, 1b) - : "+d" (cc), "+d" (__fc), "+d" (__schid), "+d" (__mask) - : : "cc", "memory"); - *bb = ((unsigned int) __fc) >> 31; + : "=d" (cc), "+d" (__fc), "+d" (__aob) + : "d" (__schid), "d" (__mask) + : "cc"); + *bb = __fc >> 31; return cc; } @@ -98,9 +101,12 @@ static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq) /* all done or next buffer state different */ if (ccq == 0 || ccq == 32) return 0; - /* not all buffers processed */ - if (ccq == 96 || ccq == 97) + /* no buffer processed */ + if (ccq == 97) return 1; + /* not all buffers processed */ + if (ccq == 96) + return 2; /* notify devices immediately */ DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq); return -EIO; @@ -120,12 +126,9 @@ static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq) static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state, int start, int count, int auto_ack) { + int rc, tmp_count = count, tmp_start = start, nr = q->nr, retried = 0; unsigned int ccq = 0; - int tmp_count = count, tmp_start = start; - int nr = q->nr; - int rc; - BUG_ON(!q->irq_ptr->sch_token); qperf_inc(q, eqbs); if (!q->is_input_q) @@ -134,29 +137,33 @@ again: ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count, auto_ack); rc = qdio_check_ccq(q, ccq); - - /* At least one buffer was processed, return and extract the remaining - * buffers later. - */ - if ((ccq == 96) && (count != tmp_count)) { - qperf_inc(q, eqbs_partial); - return (count - tmp_count); - } + if (!rc) + return count - tmp_count; if (rc == 1) { DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq); goto again; } - if (rc < 0) { - DBF_ERROR("%4x EQBS ERROR", SCH_NO(q)); - DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); - q->handler(q->irq_ptr->cdev, - QDIO_ERROR_ACTIVATE_CHECK_CONDITION, - 0, -1, -1, q->irq_ptr->int_parm); - return 0; + if (rc == 2) { + qperf_inc(q, eqbs_partial); + DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS part:%02x", + tmp_count); + /* + * Retry once, if that fails bail out and process the + * extracted buffers before trying again. + */ + if (!retried++) + goto again; + else + return count - tmp_count; } - return count - tmp_count; + + DBF_ERROR("%4x EQBS ERROR", SCH_NO(q)); + DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); + q->handler(q->irq_ptr->cdev, QDIO_ERROR_GET_BUF_STATE, + q->nr, q->first_to_kick, count, q->irq_ptr->int_parm); + return 0; } /** @@ -180,8 +187,6 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start, if (!count) return 0; - - BUG_ON(!q->irq_ptr->sch_token); qperf_inc(q, sqbs); if (!q->is_input_q) @@ -189,41 +194,44 @@ static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start, again: ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count); rc = qdio_check_ccq(q, ccq); - if (rc == 1) { + if (!rc) { + WARN_ON_ONCE(tmp_count); + return count - tmp_count; + } + + if (rc == 1 || rc == 2) { DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq); qperf_inc(q, sqbs_partial); goto again; } - if (rc < 0) { - DBF_ERROR("%4x SQBS ERROR", SCH_NO(q)); - DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); - q->handler(q->irq_ptr->cdev, - QDIO_ERROR_ACTIVATE_CHECK_CONDITION, - 0, -1, -1, q->irq_ptr->int_parm); - return 0; - } - WARN_ON(tmp_count); - return count - tmp_count; + + DBF_ERROR("%4x SQBS ERROR", SCH_NO(q)); + DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); + q->handler(q->irq_ptr->cdev, QDIO_ERROR_SET_BUF_STATE, + q->nr, q->first_to_kick, count, q->irq_ptr->int_parm); + return 0; } /* returns number of examined buffers and their common state in *state */ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr, unsigned char *state, unsigned int count, - int auto_ack) + int auto_ack, int merge_pending) { unsigned char __state = 0; int i; - BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK); - BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q); - if (is_qebsm(q)) return qdio_do_eqbs(q, state, bufnr, count, auto_ack); for (i = 0; i < count; i++) { - if (!__state) + if (!__state) { __state = q->slsb.val[bufnr]; - else if (q->slsb.val[bufnr] != __state) + if (merge_pending && __state == SLSB_P_OUTPUT_PENDING) + __state = SLSB_P_OUTPUT_EMPTY; + } else if (merge_pending) { + if ((q->slsb.val[bufnr] & __state) != __state) + break; + } else if (q->slsb.val[bufnr] != __state) break; bufnr = next_buf(bufnr); } @@ -234,7 +242,7 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr, static inline int get_buf_state(struct qdio_q *q, unsigned int bufnr, unsigned char *state, int auto_ack) { - return get_buf_states(q, bufnr, state, 1, auto_ack); + return get_buf_states(q, bufnr, state, 1, auto_ack, 0); } /* wrap-around safe setting of slsb states, returns number of changed buffers */ @@ -243,9 +251,6 @@ static inline int set_buf_states(struct qdio_q *q, int bufnr, { int i; - BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK); - BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q); - if (is_qebsm(q)) return qdio_do_sqbs(q, state, bufnr, count); @@ -263,7 +268,7 @@ static inline int set_buf_state(struct qdio_q *q, int bufnr, } /* set slsb states to initial state */ -void qdio_init_buf_states(struct qdio_irq *irq_ptr) +static void qdio_init_buf_states(struct qdio_irq *irq_ptr) { struct qdio_q *q; int i; @@ -279,18 +284,22 @@ void qdio_init_buf_states(struct qdio_irq *irq_ptr) static inline int qdio_siga_sync(struct qdio_q *q, unsigned int output, unsigned int input) { + unsigned long schid = *((u32 *) &q->irq_ptr->schid); + unsigned int fc = QDIO_SIGA_SYNC; int cc; - if (!need_siga_sync(q)) - return 0; - DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:%1d", q->nr); qperf_inc(q, siga_sync); - cc = do_siga_sync(q->irq_ptr->schid, output, input); - if (cc) + if (is_qebsm(q)) { + schid = q->irq_ptr->sch_token; + fc |= QDIO_SIGA_QEBSM_FLAG; + } + + cc = do_siga_sync(schid, output, input, fc); + if (unlikely(cc)) DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc); - return cc; + return (cc) ? -EIO : 0; } static inline int qdio_siga_sync_q(struct qdio_q *q) @@ -301,79 +310,86 @@ static inline int qdio_siga_sync_q(struct qdio_q *q) return qdio_siga_sync(q, q->mask, 0); } -static inline int qdio_siga_sync_out(struct qdio_q *q) -{ - return qdio_siga_sync(q, ~0U, 0); -} - -static inline int qdio_siga_sync_all(struct qdio_q *q) +static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit, + unsigned long aob) { - return qdio_siga_sync(q, ~0U, ~0U); -} - -static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit) -{ - unsigned long schid; - unsigned int fc = 0; + unsigned long schid = *((u32 *) &q->irq_ptr->schid); + unsigned int fc = QDIO_SIGA_WRITE; u64 start_time = 0; - int cc; + int retries = 0, cc; + unsigned long laob = 0; - if (q->u.out.use_enh_siga) - fc = 3; + if (q->u.out.use_cq && aob != 0) { + fc = QDIO_SIGA_WRITEQ; + laob = aob; + } if (is_qebsm(q)) { schid = q->irq_ptr->sch_token; - fc |= 0x80; + fc |= QDIO_SIGA_QEBSM_FLAG; } - else - schid = *((u32 *)&q->irq_ptr->schid); - again: - cc = do_siga_output(schid, q->mask, busy_bit, fc); + WARN_ON_ONCE((aob && queue_type(q) != QDIO_IQDIO_QFMT) || + (aob && fc != QDIO_SIGA_WRITEQ)); + cc = do_siga_output(schid, q->mask, busy_bit, fc, laob); /* hipersocket busy condition */ - if (*busy_bit) { - WARN_ON(queue_type(q) != QDIO_IQDIO_QFMT || cc != 2); + if (unlikely(*busy_bit)) { + retries++; if (!start_time) { - start_time = get_clock(); + start_time = get_tod_clock_fast(); goto again; } - if ((get_clock() - start_time) < QDIO_BUSY_BIT_PATIENCE) + if (get_tod_clock_fast() - start_time < QDIO_BUSY_BIT_PATIENCE) goto again; } + if (retries) { + DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, + "%4x cc2 BB1:%1d", SCH_NO(q), q->nr); + DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "count:%u", retries); + } return cc; } static inline int qdio_siga_input(struct qdio_q *q) { + unsigned long schid = *((u32 *) &q->irq_ptr->schid); + unsigned int fc = QDIO_SIGA_READ; int cc; DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr); qperf_inc(q, siga_read); - cc = do_siga_input(q->irq_ptr->schid, q->mask); - if (cc) + if (is_qebsm(q)) { + schid = q->irq_ptr->sch_token; + fc |= QDIO_SIGA_QEBSM_FLAG; + } + + cc = do_siga_input(schid, q->mask, fc); + if (unlikely(cc)) DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc); - return cc; + return (cc) ? -EIO : 0; } -static inline void qdio_sync_after_thinint(struct qdio_q *q) +#define qdio_siga_sync_out(q) qdio_siga_sync(q, ~0U, 0) +#define qdio_siga_sync_all(q) qdio_siga_sync(q, ~0U, ~0U) + +static inline void qdio_sync_queues(struct qdio_q *q) { - if (pci_out_supported(q)) { - if (need_siga_sync_thinint(q)) - qdio_siga_sync_all(q); - else if (need_siga_sync_out_thinint(q)) - qdio_siga_sync_out(q); - } else + /* PCI capable outbound queues will also be scanned so sync them too */ + if (pci_out_supported(q)) + qdio_siga_sync_all(q); + else qdio_siga_sync_q(q); } int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr, unsigned char *state) { - qdio_siga_sync_q(q); - return get_buf_states(q, bufnr, state, 1, 0); + if (need_siga_sync(q)) + qdio_siga_sync_q(q); + return get_buf_states(q, bufnr, state, 1, 0, 0); } static inline void qdio_stop_polling(struct qdio_q *q) @@ -393,39 +409,48 @@ static inline void qdio_stop_polling(struct qdio_q *q) set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT); } -static inline void account_sbals(struct qdio_q *q, int count) +static inline void account_sbals(struct qdio_q *q, unsigned int count) { - int pos = 0; + int pos; q->q_stats.nr_sbal_total += count; if (count == QDIO_MAX_BUFFERS_MASK) { q->q_stats.nr_sbals[7]++; return; } - while (count >>= 1) - pos++; + pos = ilog2(count); q->q_stats.nr_sbals[pos]++; } -static void announce_buffer_error(struct qdio_q *q, int count) +static void process_buffer_error(struct qdio_q *q, int count) { - q->qdio_error |= QDIO_ERROR_SLSB_STATE; + unsigned char state = (q->is_input_q) ? SLSB_P_INPUT_NOT_INIT : + SLSB_P_OUTPUT_NOT_INIT; + + q->qdio_error = QDIO_ERROR_SLSB_STATE; /* special handling for no target buffer empty */ if ((!q->is_input_q && - (q->sbal[q->first_to_check]->element[15].flags & 0xff) == 0x10)) { + (q->sbal[q->first_to_check]->element[15].sflags) == 0x10)) { qperf_inc(q, target_full); DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%02x", q->first_to_check); - return; + goto set; } DBF_ERROR("%4x BUF ERROR", SCH_NO(q)); DBF_ERROR((q->is_input_q) ? "IN:%2d" : "OUT:%2d", q->nr); DBF_ERROR("FTC:%3d C:%3d", q->first_to_check, count); DBF_ERROR("F14:%2x F15:%2x", - q->sbal[q->first_to_check]->element[14].flags & 0xff, - q->sbal[q->first_to_check]->element[15].flags & 0xff); + q->sbal[q->first_to_check]->element[14].sflags, + q->sbal[q->first_to_check]->element[15].sflags); + +set: + /* + * Interrupts may be avoided as long as the error is present + * so change the buffer state immediately to avoid starvation. + */ + set_buf_states(q, q->first_to_check, state, count); } static inline void inbound_primed(struct qdio_q *q, int count) @@ -476,7 +501,9 @@ static inline void inbound_primed(struct qdio_q *q, int count) static int get_inbound_buffer_frontier(struct qdio_q *q) { int count, stop; - unsigned char state; + unsigned char state = 0; + + q->timestamp = get_tod_clock_fast(); /* * Don't check 128 buffers, as otherwise qdio_inbound_q_moved @@ -492,7 +519,7 @@ static int get_inbound_buffer_frontier(struct qdio_q *q) * No siga sync here, as a PCI or we after a thin interrupt * already sync'ed the queues. */ - count = get_buf_states(q, q->first_to_check, &state, count, 1); + count = get_buf_states(q, q->first_to_check, &state, count, 1, 0); if (!count) goto out; @@ -500,14 +527,13 @@ static int get_inbound_buffer_frontier(struct qdio_q *q) case SLSB_P_INPUT_PRIMED: inbound_primed(q, count); q->first_to_check = add_buf(q->first_to_check, count); - if (atomic_sub(count, &q->nr_buf_used) == 0) + if (atomic_sub_return(count, &q->nr_buf_used) == 0) qperf_inc(q, inbound_queue_full); if (q->irq_ptr->perf_stat_enabled) account_sbals(q, count); break; case SLSB_P_INPUT_ERROR: - announce_buffer_error(q, count); - /* process the buffer, the upper layer will take care of it */ + process_buffer_error(q, count); q->first_to_check = add_buf(q->first_to_check, count); atomic_sub(count, &q->nr_buf_used); if (q->irq_ptr->perf_stat_enabled) @@ -521,7 +547,7 @@ static int get_inbound_buffer_frontier(struct qdio_q *q) DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in nop"); break; default: - BUG(); + WARN_ON_ONCE(1); } out: return q->first_to_check; @@ -533,10 +559,10 @@ static int qdio_inbound_q_moved(struct qdio_q *q) bufnr = get_inbound_buffer_frontier(q); - if ((bufnr != q->last_move) || q->qdio_error) { + if (bufnr != q->last_move) { q->last_move = bufnr; if (!is_thinint_irq(q->irq_ptr) && MACHINE_IS_LPAR) - q->u.in.timestamp = get_clock(); + q->u.in.timestamp = get_tod_clock(); return 1; } else return 0; @@ -549,7 +575,8 @@ static inline int qdio_inbound_q_done(struct qdio_q *q) if (!atomic_read(&q->nr_buf_used)) return 1; - qdio_siga_sync_q(q); + if (need_siga_sync(q)) + qdio_siga_sync_q(q); get_buf_state(q, q->first_to_check, &state, 0); if (state == SLSB_P_INPUT_PRIMED || state == SLSB_P_INPUT_ERROR) @@ -567,7 +594,7 @@ static inline int qdio_inbound_q_done(struct qdio_q *q) * At this point we know, that inbound first_to_check * has (probably) not moved (see qdio_inbound_processing). */ - if (get_clock() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) { + if (get_tod_clock_fast() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) { DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in done:%02x", q->first_to_check); return 1; @@ -575,6 +602,60 @@ static inline int qdio_inbound_q_done(struct qdio_q *q) return 0; } +static inline int contains_aobs(struct qdio_q *q) +{ + return !q->is_input_q && q->u.out.use_cq; +} + +static inline void qdio_handle_aobs(struct qdio_q *q, int start, int count) +{ + unsigned char state = 0; + int j, b = start; + + if (!contains_aobs(q)) + return; + + for (j = 0; j < count; ++j) { + get_buf_state(q, b, &state, 0); + if (state == SLSB_P_OUTPUT_PENDING) { + struct qaob *aob = q->u.out.aobs[b]; + if (aob == NULL) + continue; + + q->u.out.sbal_state[b].flags |= + QDIO_OUTBUF_STATE_FLAG_PENDING; + q->u.out.aobs[b] = NULL; + } else if (state == SLSB_P_OUTPUT_EMPTY) { + q->u.out.sbal_state[b].aob = NULL; + } + b = next_buf(b); + } +} + +static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q, + int bufnr) +{ + unsigned long phys_aob = 0; + + if (!q->use_cq) + goto out; + + if (!q->aobs[bufnr]) { + struct qaob *aob = qdio_allocate_aob(); + q->aobs[bufnr] = aob; + } + if (q->aobs[bufnr]) { + q->sbal_state[bufnr].flags = QDIO_OUTBUF_STATE_FLAG_NONE; + q->sbal_state[bufnr].aob = q->aobs[bufnr]; + q->aobs[bufnr]->user1 = (u64) q->sbal_state[bufnr].user; + phys_aob = virt_to_phys(q->aobs[bufnr]); + WARN_ON_ONCE(phys_aob & 0xFF); + } + +out: + return phys_aob; +} + static void qdio_kick_handler(struct qdio_q *q) { int start = q->first_to_kick; @@ -595,6 +676,8 @@ static void qdio_kick_handler(struct qdio_q *q) start, count); } + qdio_handle_aobs(q, start, count); + q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count, q->irq_ptr->int_parm); @@ -642,11 +725,16 @@ void qdio_inbound_processing(unsigned long data) static int get_outbound_buffer_frontier(struct qdio_q *q) { int count, stop; - unsigned char state; + unsigned char state = 0; - if (((queue_type(q) != QDIO_IQDIO_QFMT) && !pci_out_supported(q)) || - (queue_type(q) == QDIO_IQDIO_QFMT && multicast_outbound(q))) - qdio_siga_sync_q(q); + q->timestamp = get_tod_clock_fast(); + + if (need_siga_sync(q)) + if (((queue_type(q) != QDIO_IQDIO_QFMT) && + !pci_out_supported(q)) || + (queue_type(q) == QDIO_IQDIO_QFMT && + multicast_outbound(q))) + qdio_siga_sync_q(q); /* * Don't check 128 buffers, as otherwise qdio_inbound_q_moved @@ -654,27 +742,27 @@ static int get_outbound_buffer_frontier(struct qdio_q *q) */ count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK); stop = add_buf(q->first_to_check, count); - if (q->first_to_check == stop) - return q->first_to_check; + goto out; - count = get_buf_states(q, q->first_to_check, &state, count, 0); + count = get_buf_states(q, q->first_to_check, &state, count, 0, 1); if (!count) - return q->first_to_check; + goto out; switch (state) { case SLSB_P_OUTPUT_EMPTY: /* the adapter got it */ - DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out empty:%1d %02x", q->nr, count); + DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, + "out empty:%1d %02x", q->nr, count); atomic_sub(count, &q->nr_buf_used); q->first_to_check = add_buf(q->first_to_check, count); if (q->irq_ptr->perf_stat_enabled) account_sbals(q, count); + break; case SLSB_P_OUTPUT_ERROR: - announce_buffer_error(q, count); - /* process the buffer, the upper layer will take care of it */ + process_buffer_error(q, count); q->first_to_check = add_buf(q->first_to_check, count); atomic_sub(count, &q->nr_buf_used); if (q->irq_ptr->perf_stat_enabled) @@ -684,14 +772,17 @@ static int get_outbound_buffer_frontier(struct qdio_q *q) /* the adapter has not fetched the output yet */ if (q->irq_ptr->perf_stat_enabled) q->q_stats.nr_sbal_nop++; - DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out primed:%1d", q->nr); + DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out primed:%1d", + q->nr); break; case SLSB_P_OUTPUT_NOT_INIT: case SLSB_P_OUTPUT_HALTED: break; default: - BUG(); + WARN_ON_ONCE(1); } + +out: return q->first_to_check; } @@ -707,7 +798,7 @@ static inline int qdio_outbound_q_moved(struct qdio_q *q) bufnr = get_outbound_buffer_frontier(q); - if ((bufnr != q->last_move) || q->qdio_error) { + if (bufnr != q->last_move) { q->last_move = bufnr; DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out moved:%1d", q->nr); return 1; @@ -715,40 +806,52 @@ static inline int qdio_outbound_q_moved(struct qdio_q *q) return 0; } -static int qdio_kick_outbound_q(struct qdio_q *q) +static int qdio_kick_outbound_q(struct qdio_q *q, unsigned long aob) { + int retries = 0, cc; unsigned int busy_bit; - int cc; if (!need_siga_out(q)) return 0; DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w:%1d", q->nr); +retry: qperf_inc(q, siga_write); - cc = qdio_siga_output(q, &busy_bit); + cc = qdio_siga_output(q, &busy_bit, aob); switch (cc) { case 0: break; case 2: if (busy_bit) { - DBF_ERROR("%4x cc2 REP:%1d", SCH_NO(q), q->nr); - cc |= QDIO_ERROR_SIGA_BUSY; - } else + while (++retries < QDIO_BUSY_BIT_RETRIES) { + mdelay(QDIO_BUSY_BIT_RETRY_DELAY); + goto retry; + } + DBF_ERROR("%4x cc2 BBC:%1d", SCH_NO(q), q->nr); + cc = -EBUSY; + } else { DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w cc2:%1d", q->nr); + cc = -ENOBUFS; + } break; case 1: case 3: DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q), cc); + cc = -EIO; break; } + if (retries) { + DBF_ERROR("%4x cc2 BB2:%1d", SCH_NO(q), q->nr); + DBF_ERROR("count:%u", retries); + } return cc; } static void __qdio_outbound_processing(struct qdio_q *q) { qperf_inc(q, tasklet_outbound); - BUG_ON(atomic_read(&q->nr_buf_used) < 0); + WARN_ON_ONCE(atomic_read(&q->nr_buf_used) < 0); if (qdio_outbound_q_moved(q)) qdio_kick_handler(q); @@ -757,21 +860,13 @@ static void __qdio_outbound_processing(struct qdio_q *q) if (!pci_out_supported(q) && !qdio_outbound_q_done(q)) goto sched; - /* bail out for HiperSockets unicast queues */ - if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q)) - return; - - if ((queue_type(q) == QDIO_IQDIO_QFMT) && - (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL) - goto sched; - if (q->u.out.pci_out_enabled) return; /* * Now we know that queue type is either qeth without pci enabled - * or HiperSockets multicast. Make sure buffer switch from PRIMED to - * EMPTY is noticed and outbound_handler is called after some time. + * or HiperSockets. Make sure buffer switch from PRIMED to EMPTY + * is noticed and outbound_handler is called after some time. */ if (qdio_outbound_q_done(q)) del_timer(&q->u.out.timer); @@ -818,7 +913,8 @@ static inline void qdio_check_outbound_after_thinint(struct qdio_q *q) static void __tiqdio_inbound_processing(struct qdio_q *q) { qperf_inc(q, tasklet_inbound); - qdio_sync_after_thinint(q); + if (need_siga_sync(q) && need_siga_sync_after_ai(q)) + qdio_sync_queues(q); /* * The interrupt could be caused by a PCI request. Check the @@ -894,8 +990,9 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr) } q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr, q->irq_ptr->int_parm); - } else + } else { tasklet_schedule(&q->tasklet); + } } if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)) @@ -904,10 +1001,8 @@ static void qdio_int_handler_pci(struct qdio_irq *irq_ptr) for_each_output_queue(irq_ptr, q, i) { if (qdio_outbound_q_done(q)) continue; - - if (!siga_syncs_out_pci(q)) + if (need_siga_sync(q) && need_siga_sync_out_after_pci(q)) qdio_siga_sync_q(q); - tasklet_schedule(&q->tasklet); } } @@ -917,6 +1012,7 @@ static void qdio_handle_activate_check(struct ccw_device *cdev, { struct qdio_irq *irq_ptr = cdev->private->qdio_data; struct qdio_q *q; + int count; DBF_ERROR("%4x ACT CHECK", irq_ptr->schid.sch_no); DBF_ERROR("intp :%lx", intparm); @@ -930,10 +1026,17 @@ static void qdio_handle_activate_check(struct ccw_device *cdev, dump_stack(); goto no_handler; } - q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE_CHECK_CONDITION, - 0, -1, -1, irq_ptr->int_parm); + + count = sub_buf(q->first_to_check, q->first_to_kick); + q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE, + q->nr, q->first_to_kick, count, irq_ptr->int_parm); no_handler: qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); + /* + * In case of z/VM LGR (Live Guest Migration) QDIO recovery will happen. + * Therefore we call the LGR detection function here. + */ + lgr_info_log(); } static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, @@ -974,16 +1077,10 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm, irq_ptr->perf_stat.qdio_int++; if (IS_ERR(irb)) { - switch (PTR_ERR(irb)) { - case -EIO: - DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no); - qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); - wake_up(&cdev->private->wait_q); - return; - default: - WARN_ON(1); - return; - } + DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no); + qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); + wake_up(&cdev->private->wait_q); + return; } qdio_irq_check_sense(irq_ptr, irb); cstat = irb->scsw.cmd.cstat; @@ -1009,7 +1106,7 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm, case QDIO_IRQ_STATE_STOPPED: break; default: - WARN_ON(1); + WARN_ON_ONCE(1); } wake_up(&cdev->private->wait_q); } @@ -1063,7 +1160,7 @@ int qdio_shutdown(struct ccw_device *cdev, int how) if (!irq_ptr) return -ENODEV; - BUG_ON(irqs_disabled()); + WARN_ON_ONCE(irqs_disabled()); DBF_EVENT("qshutdown:%4x", cdev->private->schid.sch_no); mutex_lock(&irq_ptr->setup_mutex); @@ -1084,7 +1181,7 @@ int qdio_shutdown(struct ccw_device *cdev, int how) tiqdio_remove_input_queues(irq_ptr); qdio_shutdown_queues(cdev); - qdio_shutdown_debug_entries(irq_ptr, cdev); + qdio_shutdown_debug_entries(irq_ptr); /* cleanup subchannel */ spin_lock_irqsave(get_ccwdev_lock(cdev), flags); @@ -1136,12 +1233,10 @@ int qdio_free(struct ccw_device *cdev) return -ENODEV; DBF_EVENT("qfree:%4x", cdev->private->schid.sch_no); + DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf abandoned"); mutex_lock(&irq_ptr->setup_mutex); - if (irq_ptr->debug_area != NULL) { - debug_unregister(irq_ptr->debug_area); - irq_ptr->debug_area = NULL; - } + irq_ptr->debug_area = NULL; cdev->private->qdio_data = NULL; mutex_unlock(&irq_ptr->setup_mutex); @@ -1178,7 +1273,8 @@ int qdio_allocate(struct qdio_initialize *init_data) goto out_err; mutex_init(&irq_ptr->setup_mutex); - qdio_allocate_dbf(init_data, irq_ptr); + if (qdio_allocate_dbf(init_data, irq_ptr)) + goto out_rel; /* * Allocate a page for the chsc calls in qdio_establish. @@ -1194,7 +1290,6 @@ int qdio_allocate(struct qdio_initialize *init_data) irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA); if (!irq_ptr->qdr) goto out_rel; - WARN_ON((unsigned long)irq_ptr->qdr & 0xfff); if (qdio_allocate_qs(irq_ptr, init_data->no_input_qs, init_data->no_output_qs)) @@ -1210,6 +1305,26 @@ out_err: } EXPORT_SYMBOL_GPL(qdio_allocate); +static void qdio_detect_hsicq(struct qdio_irq *irq_ptr) +{ + struct qdio_q *q = irq_ptr->input_qs[0]; + int i, use_cq = 0; + + if (irq_ptr->nr_input_qs > 1 && queue_type(q) == QDIO_IQDIO_QFMT) + use_cq = 1; + + for_each_output_queue(irq_ptr, q, i) { + if (use_cq) { + if (qdio_enable_async_operation(&q->u.out) < 0) { + use_cq = 0; + continue; + } + } else + qdio_disable_async_operation(&q->u.out); + } + DBF_EVENT("use_cq:%d", use_cq); +} + /** * qdio_establish - establish queues on a qdio subchannel * @init_data: initialization data @@ -1273,8 +1388,8 @@ int qdio_establish(struct qdio_initialize *init_data) } qdio_setup_ssqd_info(irq_ptr); - DBF_EVENT("qDmmwc:%2x", irq_ptr->ssqd_desc.mmwc); - DBF_EVENT("qib ac:%4x", irq_ptr->qib.ac); + + qdio_detect_hsicq(irq_ptr); /* qebsm is now setup if available, initialize buffer states */ qdio_init_buf_states(irq_ptr); @@ -1380,7 +1495,7 @@ static inline int buf_in_between(int bufnr, int start, int count) static int handle_inbound(struct qdio_q *q, unsigned int callflags, int bufnr, int count) { - int used, diff; + int diff; qperf_inc(q, inbound_call); @@ -1413,16 +1528,11 @@ static int handle_inbound(struct qdio_q *q, unsigned int callflags, set: count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count); - - 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; + atomic_add(count, &q->nr_buf_used); if (need_siga_in(q)) return qdio_siga_input(q); + return 0; } @@ -1436,61 +1546,50 @@ set: static int handle_outbound(struct qdio_q *q, unsigned int callflags, int bufnr, int count) { - unsigned char state; + unsigned char state = 0; int used, rc = 0; qperf_inc(q, outbound_call); count = set_buf_states(q, bufnr, SLSB_CU_OUTPUT_PRIMED, count); used = atomic_add_return(count, &q->nr_buf_used); - BUG_ON(used > QDIO_MAX_BUFFERS_PER_Q); + + if (used == QDIO_MAX_BUFFERS_PER_Q) + qperf_inc(q, outbound_queue_full); if (callflags & QDIO_FLAG_PCI_OUT) { q->u.out.pci_out_enabled = 1; qperf_inc(q, pci_request_int); - } - else + } else q->u.out.pci_out_enabled = 0; if (queue_type(q) == QDIO_IQDIO_QFMT) { - if (multicast_outbound(q)) - rc = qdio_kick_outbound_q(q); - else - if ((q->irq_ptr->ssqd_desc.mmwc > 1) && - (count > 1) && - (count <= q->irq_ptr->ssqd_desc.mmwc)) { - /* exploit enhanced SIGA */ - q->u.out.use_enh_siga = 1; - rc = qdio_kick_outbound_q(q); - } else { - /* - * One siga-w per buffer required for unicast - * HiperSockets. - */ - q->u.out.use_enh_siga = 0; - while (count--) { - rc = qdio_kick_outbound_q(q); - if (rc) - goto out; - } - } - goto out; - } + unsigned long phys_aob = 0; - if (need_siga_sync(q)) { - qdio_siga_sync_q(q); - goto out; + /* One SIGA-W per buffer required for unicast HSI */ + WARN_ON_ONCE(count > 1 && !multicast_outbound(q)); + + phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr); + + rc = qdio_kick_outbound_q(q, phys_aob); + } else if (need_siga_sync(q)) { + rc = qdio_siga_sync_q(q); + } else { + /* try to fast requeue buffers */ + get_buf_state(q, prev_buf(bufnr), &state, 0); + if (state != SLSB_CU_OUTPUT_PRIMED) + rc = qdio_kick_outbound_q(q, 0); + else + qperf_inc(q, fast_requeue); } - /* try to fast requeue buffers */ - get_buf_state(q, prev_buf(bufnr), &state, 0); - if (state != SLSB_CU_OUTPUT_PRIMED) - rc = qdio_kick_outbound_q(q); + /* in case of SIGA errors we must process the error immediately */ + if (used >= q->u.out.scan_threshold || rc) + tasklet_schedule(&q->tasklet); else - qperf_inc(q, fast_requeue); - -out: - tasklet_schedule(&q->tasklet); + /* free the SBALs in case of no further traffic */ + if (!timer_pending(&q->u.out.timer)) + mod_timer(&q->u.out.timer, jiffies + HZ); return rc; } @@ -1518,8 +1617,9 @@ int do_QDIO(struct ccw_device *cdev, unsigned int callflags, "do%02x b:%02x c:%02x", callflags, bufnr, count); if (irq_ptr->state != QDIO_IRQ_STATE_ACTIVE) - return -EBUSY; - + return -EIO; + if (!count) + return 0; if (callflags & QDIO_FLAG_SYNC_INPUT) return handle_inbound(irq_ptr->input_qs[q_nr], callflags, bufnr, count); @@ -1548,11 +1648,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr) return -ENODEV; q = irq_ptr->input_qs[nr]; - WARN_ON(queue_irqs_enabled(q)); - - if (!shared_ind(q->irq_ptr)) - xchg(q->irq_ptr->dsci, 0); - + clear_nonshared_ind(irq_ptr); qdio_stop_polling(q); clear_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state); @@ -1560,7 +1656,7 @@ int qdio_start_irq(struct ccw_device *cdev, int nr) * We need to check again to not lose initiative after * resetting the ACK state. */ - if (!shared_ind(q->irq_ptr) && *q->irq_ptr->dsci) + if (test_nonshared_ind(irq_ptr)) goto rescan; if (!qdio_inbound_q_done(q)) goto rescan; @@ -1598,14 +1694,15 @@ int qdio_get_next_buffers(struct ccw_device *cdev, int nr, int *bufnr, if (!irq_ptr) return -ENODEV; q = irq_ptr->input_qs[nr]; - WARN_ON(queue_irqs_enabled(q)); - - qdio_sync_after_thinint(q); /* - * The interrupt could be caused by a PCI request. Check the - * PCI capable outbound queues. + * Cannot rely on automatic sync after interrupt since queues may + * also be examined without interrupt. */ + if (need_siga_sync(q)) + qdio_sync_queues(q); + + /* check the PCI capable outbound queues. */ qdio_check_outbound_after_thinint(q); if (!qdio_inbound_q_moved(q)) @@ -1653,30 +1750,121 @@ int qdio_stop_irq(struct ccw_device *cdev, int nr) } EXPORT_SYMBOL(qdio_stop_irq); +/** + * qdio_pnso_brinfo() - perform network subchannel op #0 - bridge info. + * @schid: Subchannel ID. + * @cnc: Boolean Change-Notification Control + * @response: Response code will be stored at this address + * @cb: Callback function will be executed for each element + * of the address list + * @priv: Pointer passed from the caller to qdio_pnso_brinfo() + * @type: Type of the address entry passed to the callback + * @entry: Entry containg the address of the specified type + * @priv: Pointer to pass to the callback function. + * + * Performs "Store-network-bridging-information list" operation and calls + * the callback function for every entry in the list. If "change- + * notification-control" is set, further changes in the address list + * will be reported via the IPA command. + */ +int qdio_pnso_brinfo(struct subchannel_id schid, + int cnc, u16 *response, + void (*cb)(void *priv, enum qdio_brinfo_entry_type type, + void *entry), + void *priv) +{ + struct chsc_pnso_area *rr; + int rc; + u32 prev_instance = 0; + int isfirstblock = 1; + int i, size, elems; + + rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL); + if (rr == NULL) + return -ENOMEM; + do { + /* on the first iteration, naihdr.resume_token will be zero */ + rc = chsc_pnso_brinfo(schid, rr, rr->naihdr.resume_token, cnc); + if (rc != 0 && rc != -EBUSY) + goto out; + if (rr->response.code != 1) { + rc = -EIO; + continue; + } else + rc = 0; + + if (cb == NULL) + continue; + + size = rr->naihdr.naids; + elems = (rr->response.length - + sizeof(struct chsc_header) - + sizeof(struct chsc_brinfo_naihdr)) / + size; + + if (!isfirstblock && (rr->naihdr.instance != prev_instance)) { + /* Inform the caller that they need to scrap */ + /* the data that was already reported via cb */ + rc = -EAGAIN; + break; + } + isfirstblock = 0; + prev_instance = rr->naihdr.instance; + for (i = 0; i < elems; i++) + switch (size) { + case sizeof(struct qdio_brinfo_entry_l3_ipv6): + (*cb)(priv, l3_ipv6_addr, + &rr->entries.l3_ipv6[i]); + break; + case sizeof(struct qdio_brinfo_entry_l3_ipv4): + (*cb)(priv, l3_ipv4_addr, + &rr->entries.l3_ipv4[i]); + break; + case sizeof(struct qdio_brinfo_entry_l2): + (*cb)(priv, l2_addr_lnid, + &rr->entries.l2[i]); + break; + default: + WARN_ON_ONCE(1); + rc = -EIO; + goto out; + } + } while (rr->response.code == 0x0107 || /* channel busy */ + (rr->response.code == 1 && /* list stored */ + /* resume token is non-zero => list incomplete */ + (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2))); + (*response) = rr->response.code; + +out: + free_page((unsigned long)rr); + return rc; +} +EXPORT_SYMBOL_GPL(qdio_pnso_brinfo); + static int __init init_QDIO(void) { int rc; - rc = qdio_setup_init(); + rc = qdio_debug_init(); if (rc) return rc; + rc = qdio_setup_init(); + if (rc) + goto out_debug; rc = tiqdio_allocate_memory(); if (rc) goto out_cache; - rc = qdio_debug_init(); - if (rc) - goto out_ti; rc = tiqdio_register_thinints(); if (rc) - goto out_debug; + goto out_ti; return 0; -out_debug: - qdio_debug_exit(); out_ti: tiqdio_free_memory(); out_cache: qdio_setup_exit(); +out_debug: + qdio_debug_exit(); return rc; } @@ -1684,8 +1872,8 @@ static void __exit exit_QDIO(void) { tiqdio_unregister_thinints(); tiqdio_free_memory(); - qdio_debug_exit(); qdio_setup_exit(); + qdio_debug_exit(); } module_init(init_QDIO); |