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linux/drivers/s390/crypto/zcrypt_cex4.c
Harald Freudenberger 91ffc519c1 s390/zcrypt: introduce msg tracking in zcrypt functions 
Introduce a new internal struct zcrypt_track with an retry counter
field and a last return code field. Fill and update these fields at
certain points during processing of an request/reply. This tracking
info is then used to
- avoid trying to resend the message forever. Now each message is
  tried to be send TRACK_AGAIN_MAX (currently 10) times and then the
  ioctl returns to userspace with errno EAGAIN.
- avoid trying to resend the message on the very same card/domain. If
  possible (more than one APQN with same quality) don't use the very
  same qid as the previous attempt when again scheduling the request.
  This is done by adding penalty weight values when the dispatching
  takes place. There is a penalty TRACK_AGAIN_CARD_WEIGHT_PENALTY for
  using the same card as previously and another penalty define
  TRACK_AGAIN_QUEUE_WEIGHT_PENALTY to be considered when the same qid
  as the previous sent attempt is calculated. Both values make it
  harder to choose the very same card/domain but not impossible. For
  example when only one APQN is available a resend can only address the
  very same APQN.

There are some more ideas for the future to extend the use of this
tracking information. For example the last response code at NQAP and
DQAP could be stored there, giving the possibility to extended tracing
and debugging about requests failing to get processed properly.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2020-10-07 21:49:59 +02:00

713 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright IBM Corp. 2012, 2019
* Author(s): Holger Dengler <hd@linux.vnet.ibm.com>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/atomic.h>
#include <linux/uaccess.h>
#include <linux/mod_devicetable.h>
#include "ap_bus.h"
#include "zcrypt_api.h"
#include "zcrypt_msgtype6.h"
#include "zcrypt_msgtype50.h"
#include "zcrypt_error.h"
#include "zcrypt_cex4.h"
#include "zcrypt_ccamisc.h"
#include "zcrypt_ep11misc.h"
#define CEX4A_MIN_MOD_SIZE 1 /* 8 bits */
#define CEX4A_MAX_MOD_SIZE_2K 256 /* 2048 bits */
#define CEX4A_MAX_MOD_SIZE_4K 512 /* 4096 bits */
#define CEX4C_MIN_MOD_SIZE 16 /* 256 bits */
#define CEX4C_MAX_MOD_SIZE 512 /* 4096 bits */
#define CEX4A_MAX_MESSAGE_SIZE MSGTYPE50_CRB3_MAX_MSG_SIZE
#define CEX4C_MAX_MESSAGE_SIZE MSGTYPE06_MAX_MSG_SIZE
/* Waiting time for requests to be processed.
* Currently there are some types of request which are not deterministic.
* But the maximum time limit managed by the stomper code is set to 60sec.
* Hence we have to wait at least that time period.
*/
#define CEX4_CLEANUP_TIME (900*HZ)
MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("CEX4/CEX5/CEX6/CEX7 Cryptographic Card device driver, " \
"Copyright IBM Corp. 2019");
MODULE_LICENSE("GPL");
static struct ap_device_id zcrypt_cex4_card_ids[] = {
{ .dev_type = AP_DEVICE_TYPE_CEX4,
.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX5,
.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX6,
.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX7,
.match_flags = AP_DEVICE_ID_MATCH_CARD_TYPE },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(ap, zcrypt_cex4_card_ids);
static struct ap_device_id zcrypt_cex4_queue_ids[] = {
{ .dev_type = AP_DEVICE_TYPE_CEX4,
.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX5,
.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX6,
.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
{ .dev_type = AP_DEVICE_TYPE_CEX7,
.match_flags = AP_DEVICE_ID_MATCH_QUEUE_TYPE },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(ap, zcrypt_cex4_queue_ids);
/*
* CCA card additional device attributes
*/
static ssize_t cca_serialnr_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct cca_info ci;
struct ap_card *ac = to_ap_card(dev);
struct zcrypt_card *zc = ac->private;
memset(&ci, 0, sizeof(ci));
if (ap_domain_index >= 0)
cca_get_info(ac->id, ap_domain_index, &ci, zc->online);
return scnprintf(buf, PAGE_SIZE, "%s\n", ci.serial);
}
static struct device_attribute dev_attr_cca_serialnr =
__ATTR(serialnr, 0444, cca_serialnr_show, NULL);
static struct attribute *cca_card_attrs[] = {
&dev_attr_cca_serialnr.attr,
NULL,
};
static const struct attribute_group cca_card_attr_grp = {
.attrs = cca_card_attrs,
};
/*
* CCA queue additional device attributes
*/
static ssize_t cca_mkvps_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int n = 0;
struct cca_info ci;
struct zcrypt_queue *zq = to_ap_queue(dev)->private;
static const char * const cao_state[] = { "invalid", "valid" };
static const char * const new_state[] = { "empty", "partial", "full" };
memset(&ci, 0, sizeof(ci));
cca_get_info(AP_QID_CARD(zq->queue->qid),
AP_QID_QUEUE(zq->queue->qid),
&ci, zq->online);
if (ci.new_aes_mk_state >= '1' && ci.new_aes_mk_state <= '3')
n = scnprintf(buf, PAGE_SIZE, "AES NEW: %s 0x%016llx\n",
new_state[ci.new_aes_mk_state - '1'],
ci.new_aes_mkvp);
else
n = scnprintf(buf, PAGE_SIZE, "AES NEW: - -\n");
if (ci.cur_aes_mk_state >= '1' && ci.cur_aes_mk_state <= '2')
n += scnprintf(buf + n, PAGE_SIZE - n,
"AES CUR: %s 0x%016llx\n",
cao_state[ci.cur_aes_mk_state - '1'],
ci.cur_aes_mkvp);
else
n += scnprintf(buf + n, PAGE_SIZE - n, "AES CUR: - -\n");
if (ci.old_aes_mk_state >= '1' && ci.old_aes_mk_state <= '2')
n += scnprintf(buf + n, PAGE_SIZE - n,
"AES OLD: %s 0x%016llx\n",
cao_state[ci.old_aes_mk_state - '1'],
ci.old_aes_mkvp);
else
n += scnprintf(buf + n, PAGE_SIZE - n, "AES OLD: - -\n");
if (ci.new_apka_mk_state >= '1' && ci.new_apka_mk_state <= '3')
n += scnprintf(buf + n, PAGE_SIZE - n,
"APKA NEW: %s 0x%016llx\n",
new_state[ci.new_apka_mk_state - '1'],
ci.new_apka_mkvp);
else
n += scnprintf(buf + n, PAGE_SIZE - n, "APKA NEW: - -\n");
if (ci.cur_apka_mk_state >= '1' && ci.cur_apka_mk_state <= '2')
n += scnprintf(buf + n, PAGE_SIZE - n,
"APKA CUR: %s 0x%016llx\n",
cao_state[ci.cur_apka_mk_state - '1'],
ci.cur_apka_mkvp);
else
n += scnprintf(buf + n, PAGE_SIZE - n, "APKA CUR: - -\n");
if (ci.old_apka_mk_state >= '1' && ci.old_apka_mk_state <= '2')
n += scnprintf(buf + n, PAGE_SIZE - n,
"APKA OLD: %s 0x%016llx\n",
cao_state[ci.old_apka_mk_state - '1'],
ci.old_apka_mkvp);
else
n += scnprintf(buf + n, PAGE_SIZE - n, "APKA OLD: - -\n");
return n;
}
static struct device_attribute dev_attr_cca_mkvps =
__ATTR(mkvps, 0444, cca_mkvps_show, NULL);
static struct attribute *cca_queue_attrs[] = {
&dev_attr_cca_mkvps.attr,
NULL,
};
static const struct attribute_group cca_queue_attr_grp = {
.attrs = cca_queue_attrs,
};
/*
* EP11 card additional device attributes
*/
static ssize_t ep11_api_ordinalnr_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ep11_card_info ci;
struct ap_card *ac = to_ap_card(dev);
struct zcrypt_card *zc = ac->private;
memset(&ci, 0, sizeof(ci));
ep11_get_card_info(ac->id, &ci, zc->online);
if (ci.API_ord_nr > 0)
return scnprintf(buf, PAGE_SIZE, "%u\n", ci.API_ord_nr);
else
return scnprintf(buf, PAGE_SIZE, "\n");
}
static struct device_attribute dev_attr_ep11_api_ordinalnr =
__ATTR(API_ordinalnr, 0444, ep11_api_ordinalnr_show, NULL);
static ssize_t ep11_fw_version_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ep11_card_info ci;
struct ap_card *ac = to_ap_card(dev);
struct zcrypt_card *zc = ac->private;
memset(&ci, 0, sizeof(ci));
ep11_get_card_info(ac->id, &ci, zc->online);
if (ci.FW_version > 0)
return scnprintf(buf, PAGE_SIZE, "%d.%d\n",
(int)(ci.FW_version >> 8),
(int)(ci.FW_version & 0xFF));
else
return scnprintf(buf, PAGE_SIZE, "\n");
}
static struct device_attribute dev_attr_ep11_fw_version =
__ATTR(FW_version, 0444, ep11_fw_version_show, NULL);
static ssize_t ep11_serialnr_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ep11_card_info ci;
struct ap_card *ac = to_ap_card(dev);
struct zcrypt_card *zc = ac->private;
memset(&ci, 0, sizeof(ci));
ep11_get_card_info(ac->id, &ci, zc->online);
if (ci.serial[0])
return scnprintf(buf, PAGE_SIZE, "%16.16s\n", ci.serial);
else
return scnprintf(buf, PAGE_SIZE, "\n");
}
static struct device_attribute dev_attr_ep11_serialnr =
__ATTR(serialnr, 0444, ep11_serialnr_show, NULL);
static const struct {
int mode_bit;
const char *mode_txt;
} ep11_op_modes[] = {
{ 0, "FIPS2009" },
{ 1, "BSI2009" },
{ 2, "FIPS2011" },
{ 3, "BSI2011" },
{ 6, "BSICC2017" },
{ 0, NULL }
};
static ssize_t ep11_card_op_modes_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int i, n = 0;
struct ep11_card_info ci;
struct ap_card *ac = to_ap_card(dev);
struct zcrypt_card *zc = ac->private;
memset(&ci, 0, sizeof(ci));
ep11_get_card_info(ac->id, &ci, zc->online);
for (i = 0; ep11_op_modes[i].mode_txt; i++) {
if (ci.op_mode & (1ULL << ep11_op_modes[i].mode_bit)) {
if (n > 0)
buf[n++] = ' ';
n += scnprintf(buf + n, PAGE_SIZE - n,
"%s", ep11_op_modes[i].mode_txt);
}
}
n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
return n;
}
static struct device_attribute dev_attr_ep11_card_op_modes =
__ATTR(op_modes, 0444, ep11_card_op_modes_show, NULL);
static struct attribute *ep11_card_attrs[] = {
&dev_attr_ep11_api_ordinalnr.attr,
&dev_attr_ep11_fw_version.attr,
&dev_attr_ep11_serialnr.attr,
&dev_attr_ep11_card_op_modes.attr,
NULL,
};
static const struct attribute_group ep11_card_attr_grp = {
.attrs = ep11_card_attrs,
};
/*
* EP11 queue additional device attributes
*/
static ssize_t ep11_mkvps_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int n = 0;
struct ep11_domain_info di;
struct zcrypt_queue *zq = to_ap_queue(dev)->private;
static const char * const cwk_state[] = { "invalid", "valid" };
static const char * const nwk_state[] = { "empty", "uncommitted",
"committed" };
memset(&di, 0, sizeof(di));
if (zq->online)
ep11_get_domain_info(AP_QID_CARD(zq->queue->qid),
AP_QID_QUEUE(zq->queue->qid),
&di);
if (di.cur_wk_state == '0') {
n = scnprintf(buf, PAGE_SIZE, "WK CUR: %s -\n",
cwk_state[di.cur_wk_state - '0']);
} else if (di.cur_wk_state == '1') {
n = scnprintf(buf, PAGE_SIZE, "WK CUR: %s 0x",
cwk_state[di.cur_wk_state - '0']);
bin2hex(buf + n, di.cur_wkvp, sizeof(di.cur_wkvp));
n += 2 * sizeof(di.cur_wkvp);
n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
} else
n = scnprintf(buf, PAGE_SIZE, "WK CUR: - -\n");
if (di.new_wk_state == '0') {
n += scnprintf(buf + n, PAGE_SIZE - n, "WK NEW: %s -\n",
nwk_state[di.new_wk_state - '0']);
} else if (di.new_wk_state >= '1' && di.new_wk_state <= '2') {
n += scnprintf(buf + n, PAGE_SIZE - n, "WK NEW: %s 0x",
nwk_state[di.new_wk_state - '0']);
bin2hex(buf + n, di.new_wkvp, sizeof(di.new_wkvp));
n += 2 * sizeof(di.new_wkvp);
n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
} else
n += scnprintf(buf + n, PAGE_SIZE - n, "WK NEW: - -\n");
return n;
}
static struct device_attribute dev_attr_ep11_mkvps =
__ATTR(mkvps, 0444, ep11_mkvps_show, NULL);
static ssize_t ep11_queue_op_modes_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int i, n = 0;
struct ep11_domain_info di;
struct zcrypt_queue *zq = to_ap_queue(dev)->private;
memset(&di, 0, sizeof(di));
if (zq->online)
ep11_get_domain_info(AP_QID_CARD(zq->queue->qid),
AP_QID_QUEUE(zq->queue->qid),
&di);
for (i = 0; ep11_op_modes[i].mode_txt; i++) {
if (di.op_mode & (1ULL << ep11_op_modes[i].mode_bit)) {
if (n > 0)
buf[n++] = ' ';
n += scnprintf(buf + n, PAGE_SIZE - n,
"%s", ep11_op_modes[i].mode_txt);
}
}
n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
return n;
}
static struct device_attribute dev_attr_ep11_queue_op_modes =
__ATTR(op_modes, 0444, ep11_queue_op_modes_show, NULL);
static struct attribute *ep11_queue_attrs[] = {
&dev_attr_ep11_mkvps.attr,
&dev_attr_ep11_queue_op_modes.attr,
NULL,
};
static const struct attribute_group ep11_queue_attr_grp = {
.attrs = ep11_queue_attrs,
};
/**
* Probe function for CEX4/CEX5/CEX6/CEX7 card device. It always
* accepts the AP device since the bus_match already checked
* the hardware type.
* @ap_dev: pointer to the AP device.
*/
static int zcrypt_cex4_card_probe(struct ap_device *ap_dev)
{
/*
* Normalized speed ratings per crypto adapter
* MEX_1k, MEX_2k, MEX_4k, CRT_1k, CRT_2k, CRT_4k, RNG, SECKEY
*/
static const int CEX4A_SPEED_IDX[NUM_OPS] = {
14, 19, 249, 42, 228, 1458, 0, 0};
static const int CEX5A_SPEED_IDX[NUM_OPS] = {
8, 9, 20, 18, 66, 458, 0, 0};
static const int CEX6A_SPEED_IDX[NUM_OPS] = {
6, 9, 20, 17, 65, 438, 0, 0};
static const int CEX7A_SPEED_IDX[NUM_OPS] = {
6, 8, 17, 15, 54, 362, 0, 0};
static const int CEX4C_SPEED_IDX[NUM_OPS] = {
59, 69, 308, 83, 278, 2204, 209, 40};
static const int CEX5C_SPEED_IDX[] = {
24, 31, 50, 37, 90, 479, 27, 10};
static const int CEX6C_SPEED_IDX[NUM_OPS] = {
16, 20, 32, 27, 77, 455, 24, 9};
static const int CEX7C_SPEED_IDX[NUM_OPS] = {
14, 16, 26, 23, 64, 376, 23, 8};
static const int CEX4P_SPEED_IDX[NUM_OPS] = {
0, 0, 0, 0, 0, 0, 0, 50};
static const int CEX5P_SPEED_IDX[NUM_OPS] = {
0, 0, 0, 0, 0, 0, 0, 10};
static const int CEX6P_SPEED_IDX[NUM_OPS] = {
0, 0, 0, 0, 0, 0, 0, 9};
static const int CEX7P_SPEED_IDX[NUM_OPS] = {
0, 0, 0, 0, 0, 0, 0, 8};
struct ap_card *ac = to_ap_card(&ap_dev->device);
struct zcrypt_card *zc;
int rc = 0;
zc = zcrypt_card_alloc();
if (!zc)
return -ENOMEM;
zc->card = ac;
ac->private = zc;
if (ap_test_bit(&ac->functions, AP_FUNC_ACCEL)) {
if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
zc->type_string = "CEX4A";
zc->user_space_type = ZCRYPT_CEX4;
zc->speed_rating = CEX4A_SPEED_IDX;
} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) {
zc->type_string = "CEX5A";
zc->user_space_type = ZCRYPT_CEX5;
zc->speed_rating = CEX5A_SPEED_IDX;
} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX6) {
zc->type_string = "CEX6A";
zc->user_space_type = ZCRYPT_CEX6;
zc->speed_rating = CEX6A_SPEED_IDX;
} else {
zc->type_string = "CEX7A";
/* wrong user space type, just for compatibility
* with the ZCRYPT_STATUS_MASK ioctl.
*/
zc->user_space_type = ZCRYPT_CEX6;
zc->speed_rating = CEX7A_SPEED_IDX;
}
zc->min_mod_size = CEX4A_MIN_MOD_SIZE;
if (ap_test_bit(&ac->functions, AP_FUNC_MEX4K) &&
ap_test_bit(&ac->functions, AP_FUNC_CRT4K)) {
zc->max_mod_size = CEX4A_MAX_MOD_SIZE_4K;
zc->max_exp_bit_length =
CEX4A_MAX_MOD_SIZE_4K;
} else {
zc->max_mod_size = CEX4A_MAX_MOD_SIZE_2K;
zc->max_exp_bit_length =
CEX4A_MAX_MOD_SIZE_2K;
}
} else if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
zc->type_string = "CEX4C";
/* wrong user space type, must be CEX4
* just keep it for cca compatibility
*/
zc->user_space_type = ZCRYPT_CEX3C;
zc->speed_rating = CEX4C_SPEED_IDX;
} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) {
zc->type_string = "CEX5C";
/* wrong user space type, must be CEX5
* just keep it for cca compatibility
*/
zc->user_space_type = ZCRYPT_CEX3C;
zc->speed_rating = CEX5C_SPEED_IDX;
} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX6) {
zc->type_string = "CEX6C";
/* wrong user space type, must be CEX6
* just keep it for cca compatibility
*/
zc->user_space_type = ZCRYPT_CEX3C;
zc->speed_rating = CEX6C_SPEED_IDX;
} else {
zc->type_string = "CEX7C";
/* wrong user space type, must be CEX7
* just keep it for cca compatibility
*/
zc->user_space_type = ZCRYPT_CEX3C;
zc->speed_rating = CEX7C_SPEED_IDX;
}
zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
} else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) {
if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX4) {
zc->type_string = "CEX4P";
zc->user_space_type = ZCRYPT_CEX4;
zc->speed_rating = CEX4P_SPEED_IDX;
} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX5) {
zc->type_string = "CEX5P";
zc->user_space_type = ZCRYPT_CEX5;
zc->speed_rating = CEX5P_SPEED_IDX;
} else if (ac->ap_dev.device_type == AP_DEVICE_TYPE_CEX6) {
zc->type_string = "CEX6P";
zc->user_space_type = ZCRYPT_CEX6;
zc->speed_rating = CEX6P_SPEED_IDX;
} else {
zc->type_string = "CEX7P";
/* wrong user space type, just for compatibility
* with the ZCRYPT_STATUS_MASK ioctl.
*/
zc->user_space_type = ZCRYPT_CEX6;
zc->speed_rating = CEX7P_SPEED_IDX;
}
zc->min_mod_size = CEX4C_MIN_MOD_SIZE;
zc->max_mod_size = CEX4C_MAX_MOD_SIZE;
zc->max_exp_bit_length = CEX4C_MAX_MOD_SIZE;
} else {
zcrypt_card_free(zc);
return -ENODEV;
}
zc->online = 1;
rc = zcrypt_card_register(zc);
if (rc) {
ac->private = NULL;
zcrypt_card_free(zc);
return rc;
}
if (ap_test_bit(&ac->functions, AP_FUNC_COPRO)) {
rc = sysfs_create_group(&ap_dev->device.kobj,
&cca_card_attr_grp);
if (rc) {
zcrypt_card_unregister(zc);
ac->private = NULL;
zcrypt_card_free(zc);
}
} else if (ap_test_bit(&ac->functions, AP_FUNC_EP11)) {
rc = sysfs_create_group(&ap_dev->device.kobj,
&ep11_card_attr_grp);
if (rc) {
zcrypt_card_unregister(zc);
ac->private = NULL;
zcrypt_card_free(zc);
}
}
return rc;
}
/**
* This is called to remove the CEX4/CEX5/CEX6/CEX7 card driver
* information if an AP card device is removed.
*/
static void zcrypt_cex4_card_remove(struct ap_device *ap_dev)
{
struct ap_card *ac = to_ap_card(&ap_dev->device);
struct zcrypt_card *zc = ac->private;
if (ap_test_bit(&ac->functions, AP_FUNC_COPRO))
sysfs_remove_group(&ap_dev->device.kobj, &cca_card_attr_grp);
else if (ap_test_bit(&ac->functions, AP_FUNC_EP11))
sysfs_remove_group(&ap_dev->device.kobj, &ep11_card_attr_grp);
if (zc)
zcrypt_card_unregister(zc);
}
static struct ap_driver zcrypt_cex4_card_driver = {
.probe = zcrypt_cex4_card_probe,
.remove = zcrypt_cex4_card_remove,
.ids = zcrypt_cex4_card_ids,
.flags = AP_DRIVER_FLAG_DEFAULT,
};
/**
* Probe function for CEX4/CEX5/CEX6/CEX7 queue device. It always
* accepts the AP device since the bus_match already checked
* the hardware type.
* @ap_dev: pointer to the AP device.
*/
static int zcrypt_cex4_queue_probe(struct ap_device *ap_dev)
{
struct ap_queue *aq = to_ap_queue(&ap_dev->device);
struct zcrypt_queue *zq;
int rc;
if (ap_test_bit(&aq->card->functions, AP_FUNC_ACCEL)) {
zq = zcrypt_queue_alloc(CEX4A_MAX_MESSAGE_SIZE);
if (!zq)
return -ENOMEM;
zq->ops = zcrypt_msgtype(MSGTYPE50_NAME,
MSGTYPE50_VARIANT_DEFAULT);
} else if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
if (!zq)
return -ENOMEM;
zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
MSGTYPE06_VARIANT_DEFAULT);
} else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) {
zq = zcrypt_queue_alloc(CEX4C_MAX_MESSAGE_SIZE);
if (!zq)
return -ENOMEM;
zq->ops = zcrypt_msgtype(MSGTYPE06_NAME,
MSGTYPE06_VARIANT_EP11);
} else {
return -ENODEV;
}
zq->queue = aq;
zq->online = 1;
atomic_set(&zq->load, 0);
ap_queue_init_state(aq);
ap_queue_init_reply(aq, &zq->reply);
aq->request_timeout = CEX4_CLEANUP_TIME,
aq->private = zq;
rc = zcrypt_queue_register(zq);
if (rc) {
aq->private = NULL;
zcrypt_queue_free(zq);
return rc;
}
if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO)) {
rc = sysfs_create_group(&ap_dev->device.kobj,
&cca_queue_attr_grp);
if (rc) {
zcrypt_queue_unregister(zq);
aq->private = NULL;
zcrypt_queue_free(zq);
}
} else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11)) {
rc = sysfs_create_group(&ap_dev->device.kobj,
&ep11_queue_attr_grp);
if (rc) {
zcrypt_queue_unregister(zq);
aq->private = NULL;
zcrypt_queue_free(zq);
}
}
return rc;
}
/**
* This is called to remove the CEX4/CEX5/CEX6/CEX7 queue driver
* information if an AP queue device is removed.
*/
static void zcrypt_cex4_queue_remove(struct ap_device *ap_dev)
{
struct ap_queue *aq = to_ap_queue(&ap_dev->device);
struct zcrypt_queue *zq = aq->private;
if (ap_test_bit(&aq->card->functions, AP_FUNC_COPRO))
sysfs_remove_group(&ap_dev->device.kobj, &cca_queue_attr_grp);
else if (ap_test_bit(&aq->card->functions, AP_FUNC_EP11))
sysfs_remove_group(&ap_dev->device.kobj, &ep11_queue_attr_grp);
if (zq)
zcrypt_queue_unregister(zq);
}
static struct ap_driver zcrypt_cex4_queue_driver = {
.probe = zcrypt_cex4_queue_probe,
.remove = zcrypt_cex4_queue_remove,
.ids = zcrypt_cex4_queue_ids,
.flags = AP_DRIVER_FLAG_DEFAULT,
};
int __init zcrypt_cex4_init(void)
{
int rc;
rc = ap_driver_register(&zcrypt_cex4_card_driver,
THIS_MODULE, "cex4card");
if (rc)
return rc;
rc = ap_driver_register(&zcrypt_cex4_queue_driver,
THIS_MODULE, "cex4queue");
if (rc)
ap_driver_unregister(&zcrypt_cex4_card_driver);
return rc;
}
void __exit zcrypt_cex4_exit(void)
{
ap_driver_unregister(&zcrypt_cex4_queue_driver);
ap_driver_unregister(&zcrypt_cex4_card_driver);
}
module_init(zcrypt_cex4_init);
module_exit(zcrypt_cex4_exit);
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