diff options
author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-06-26 15:40:41 +0200 |
---|---|---|
committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-14 14:32:19 +0200 |
commit | 6acbe21f473f5cff8a11546f090967459b63ab3e (patch) | |
tree | b4014950cbaa834720efebc2d5a720ebf9cd2687 | |
parent | 29b0a8250ba63beffba4fe3a42fa75dddf4bd06a (diff) | |
download | linux-6acbe21f473f5cff8a11546f090967459b63ab3e.tar.bz2 |
s390/zcrypt: remove duplicate low level functions
ap_test_queue, ap_query_facilities, __ap_query_functions all use
the same PQAP(TAPQ) command. Consolidate the three into a single
ap_test_queue function that returns the AP status and the 64-bit
result. The exception table entry for PQAP(TAPQ) can be avoided
if the T bit for the APFT facility is set only if test_facility(15)
indicated that the facility is present.
Integrate ap_query_function into ap_query queue to avoid calling
PQAP(TAPQ) twice.
Reviewed-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r-- | drivers/s390/crypto/ap_bus.c | 140 | ||||
-rw-r--r-- | drivers/s390/crypto/ap_bus.h | 9 |
2 files changed, 32 insertions, 117 deletions
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index d78b3d629d78..613c92b22445 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -182,44 +182,27 @@ static int ap_configuration_available(void) /** * ap_test_queue(): Test adjunct processor queue. * @qid: The AP queue number - * @queue_depth: Pointer to queue depth value - * @device_type: Pointer to device type value + * @info: Pointer to queue descriptor * * Returns AP queue status structure. */ static inline struct ap_queue_status -ap_test_queue(ap_qid_t qid, int *queue_depth, int *device_type) +ap_test_queue(ap_qid_t qid, unsigned long *info) { register unsigned long reg0 asm ("0") = qid; register struct ap_queue_status reg1 asm ("1"); register unsigned long reg2 asm ("2") = 0UL; + if (test_facility(15)) + reg0 |= 1UL << 23; /* set APFT T bit*/ asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); - *device_type = (int) (reg2 >> 24); - *queue_depth = (int) (reg2 & 0xff); + if (info) + *info = reg2; return reg1; } /** - * ap_query_facilities(): PQAP(TAPQ) query facilities. - * @qid: The AP queue number - * - * Returns content of general register 2 after the PQAP(TAPQ) - * instruction was called. - */ -static inline unsigned long ap_query_facilities(ap_qid_t qid) -{ - register unsigned long reg0 asm ("0") = qid | 0x00800000UL; - register unsigned long reg1 asm ("1"); - register unsigned long reg2 asm ("2") = 0UL; - - asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ - : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); - return reg2; -} - -/** * ap_reset_queue(): Reset adjunct processor queue. * @qid: The AP queue number * @@ -259,25 +242,6 @@ ap_queue_interruption_control(ap_qid_t qid, void *ind) return reg1_out; } -static inline struct ap_queue_status -__ap_query_functions(ap_qid_t qid, unsigned int *functions) -{ - register unsigned long reg0 asm ("0") = 0UL | qid | (1UL << 23); - register struct ap_queue_status reg1 asm ("1") = AP_QUEUE_STATUS_INVALID; - register unsigned long reg2 asm ("2"); - - asm volatile( - ".long 0xb2af0000\n" /* PQAP(TAPQ) */ - "0:\n" - EX_TABLE(0b, 0b) - : "+d" (reg0), "+d" (reg1), "=d" (reg2) - : - : "cc"); - - *functions = (unsigned int)(reg2 >> 32); - return reg1; -} - static inline int __ap_query_configuration(struct ap_config_info *config) { register unsigned long reg0 asm ("0") = 0x04000000UL; @@ -297,42 +261,6 @@ static inline int __ap_query_configuration(struct ap_config_info *config) } /** - * ap_query_functions(): Query supported functions. - * @qid: The AP queue number - * @functions: Pointer to functions field. - * - * Returns - * 0 on success. - * -ENODEV if queue not valid. - * -EBUSY if device busy. - * -EINVAL if query function is not supported - */ -static int ap_query_functions(ap_qid_t qid, unsigned int *functions) -{ - struct ap_queue_status status; - - status = __ap_query_functions(qid, functions); - - if (ap_queue_status_invalid_test(&status)) - return -ENODEV; - - switch (status.response_code) { - case AP_RESPONSE_NORMAL: - return 0; - case AP_RESPONSE_Q_NOT_AVAIL: - case AP_RESPONSE_DECONFIGURED: - case AP_RESPONSE_CHECKSTOPPED: - case AP_RESPONSE_INVALID_ADDRESS: - return -ENODEV; - case AP_RESPONSE_RESET_IN_PROGRESS: - case AP_RESPONSE_BUSY: - case AP_RESPONSE_OTHERWISE_CHANGED: - default: - return -EBUSY; - } -} - -/** * ap_queue_enable_interruption(): Enable interruption on an AP. * @qid: The AP queue number * @ind: the notification indicator byte @@ -515,17 +443,20 @@ static inline void ap_schedule_poll_timer(void) * @qid: The AP queue number * @queue_depth: Pointer to queue depth value * @device_type: Pointer to device type value + * @facilities: Pointer to facility indicator */ -static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type) +static int ap_query_queue(ap_qid_t qid, int *queue_depth, int *device_type, + unsigned int *facilities) { struct ap_queue_status status; - int t_depth, t_device_type; + unsigned long info; - status = ap_test_queue(qid, &t_depth, &t_device_type); + status = ap_test_queue(qid, &info); switch (status.response_code) { case AP_RESPONSE_NORMAL: - *queue_depth = t_depth + 1; - *device_type = t_device_type; + *queue_depth = (int)(info & 0xff); + *device_type = (int)((info >> 24) & 0xff); + *facilities = (unsigned int)(info >> 32); return 0; case AP_RESPONSE_Q_NOT_AVAIL: case AP_RESPONSE_DECONFIGURED: @@ -1184,6 +1115,7 @@ static BUS_ATTR(poll_timeout, 0644, poll_timeout_show, poll_timeout_store); static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) { + struct ap_queue_status status; ap_qid_t qid; int i, nd, max_domain_id = -1; unsigned long fbits; @@ -1194,7 +1126,9 @@ static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf) if (!ap_test_config_card_id(i)) continue; qid = AP_MKQID(i, ap_domain_index); - fbits = ap_query_facilities(qid); + status = ap_test_queue(qid, &fbits); + if (status.response_code != AP_RESPONSE_NORMAL) + continue; if (fbits & (1UL << 57)) { /* the N bit is 0, Nd field is filled */ nd = (int)((fbits & 0x00FF0000UL)>>16); @@ -1254,9 +1188,9 @@ static void ap_query_configuration(void) */ static int ap_select_domain(void) { - int queue_depth, device_type, count, max_count, best_domain; - ap_qid_t qid; - int rc, i, j; + int count, max_count, best_domain; + struct ap_queue_status status; + int i, j; /* IF APXA isn't installed, only 16 domains could be defined */ if (!ap_configuration->ap_extended && (ap_domain_index > 15)) @@ -1279,9 +1213,8 @@ static int ap_select_domain(void) for (j = 0; j < AP_DEVICES; j++) { if (!ap_test_config_card_id(j)) continue; - qid = AP_MKQID(j, i); - rc = ap_query_queue(qid, &queue_depth, &device_type); - if (rc) + status = ap_test_queue(AP_MKQID(j, i), NULL); + if (status.response_code != AP_RESPONSE_NORMAL) continue; count++; } @@ -1438,7 +1371,8 @@ static void ap_scan_bus(struct work_struct *unused) (void *)(unsigned long)qid, __ap_scan_bus); if (ap_test_config_card_id(i)) - rc = ap_query_queue(qid, &queue_depth, &device_type); + rc = ap_query_queue(qid, &queue_depth, &device_type, + &device_functions); else rc = -ENODEV; if (dev) { @@ -1468,6 +1402,9 @@ static void ap_scan_bus(struct work_struct *unused) continue; } ap_dev->queue_depth = queue_depth; + ap_dev->raw_hwtype = device_type; + ap_dev->device_type = device_type; + ap_dev->functions = device_functions; ap_dev->unregistered = 1; spin_lock_init(&ap_dev->lock); INIT_LIST_HEAD(&ap_dev->pendingq); @@ -1475,24 +1412,12 @@ static void ap_scan_bus(struct work_struct *unused) INIT_LIST_HEAD(&ap_dev->list); setup_timer(&ap_dev->timeout, ap_request_timeout, (unsigned long) ap_dev); - switch (device_type) { - case 0: + if (ap_dev->device_type == 0) /* device type probing for old cards */ if (ap_probe_device_type(ap_dev)) { kfree(ap_dev); continue; } - break; - default: - ap_dev->device_type = device_type; - } - ap_dev->raw_hwtype = device_type; - - rc = ap_query_functions(qid, &device_functions); - if (!rc) - ap_dev->functions = device_functions; - else - ap_dev->functions = 0u; ap_dev->device.bus = &ap_bus_type; ap_dev->device.parent = ap_root_device; @@ -1640,12 +1565,11 @@ static int ap_poll_write(struct ap_device *ap_dev, unsigned long *flags) */ static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) { - int rc, depth, type; struct ap_queue_status status; - + int rc; if (ap_dev->reset == AP_RESET_IN_PROGRESS) { - status = ap_test_queue(ap_dev->qid, &depth, &type); + status = ap_test_queue(ap_dev->qid, NULL); switch (status.response_code) { case AP_RESPONSE_NORMAL: ap_dev->reset = AP_RESET_IGNORE; @@ -1676,7 +1600,7 @@ static inline int ap_poll_queue(struct ap_device *ap_dev, unsigned long *flags) if ((ap_dev->reset != AP_RESET_IN_PROGRESS) && (ap_dev->interrupt == AP_INTR_IN_PROGRESS)) { - status = ap_test_queue(ap_dev->qid, &depth, &type); + status = ap_test_queue(ap_dev->qid, NULL); if (ap_using_interrupts()) { if (status.int_enabled == 1) ap_dev->interrupt = AP_INTR_ENABLED; diff --git a/drivers/s390/crypto/ap_bus.h b/drivers/s390/crypto/ap_bus.h index 00468c8d0781..2e0a21f84f3d 100644 --- a/drivers/s390/crypto/ap_bus.h +++ b/drivers/s390/crypto/ap_bus.h @@ -75,15 +75,6 @@ struct ap_queue_status { unsigned int pad2 : 16; } __packed; -#define AP_QUEUE_STATUS_INVALID \ - { 1, 1, 1, 0xF, 1, 0xFF, 0xFFFF } - -static inline -int ap_queue_status_invalid_test(struct ap_queue_status *status) -{ - struct ap_queue_status invalid = AP_QUEUE_STATUS_INVALID; - return !(memcmp(status, &invalid, sizeof(struct ap_queue_status))); -} #define AP_MAX_BITS 31 static inline int ap_test_bit(unsigned int *ptr, unsigned int nr) |