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s390/ipl: Introduce macros for (re)ipl sysfs attribute 'scp_data'

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This is a refactoring change to reduce code duplication and improve code
reuse.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Alexander Egorenkov 2024-05-10 12:41:27 +02:00 committed by Alexander Gordeev
parent 7faacaeaf6
commit 005ca01333
1 changed files with 83 additions and 163 deletions
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246
arch/s390/kernel/ipl.c
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@ -279,6 +279,61 @@ static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store)
#define IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
static ssize_t sys_##_prefix##_scp_data_show(struct file *filp, \
struct kobject *kobj, \
struct bin_attribute *attr, \
char *buf, loff_t off, \
size_t count) \
{ \
size_t size = _ipl_block.scp_data_len; \
void *scp_data = _ipl_block.scp_data; \
\
return memory_read_from_buffer(buf, count, &off, \
scp_data, size); \
}
#define IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
static ssize_t sys_##_prefix##_scp_data_store(struct file *filp, \
struct kobject *kobj, \
struct bin_attribute *attr, \
char *buf, loff_t off, \
size_t count) \
{ \
size_t scpdata_len = count; \
size_t padding; \
\
if (off) \
return -EINVAL; \
\
memcpy(_ipl_block.scp_data, buf, count); \
if (scpdata_len % 8) { \
padding = 8 - (scpdata_len % 8); \
memset(_ipl_block.scp_data + scpdata_len, \
0, padding); \
scpdata_len += padding; \
} \
\
_ipl_block_hdr.len = _ipl_bp_len + scpdata_len; \
_ipl_block.len = _ipl_bp0_len + scpdata_len; \
_ipl_block.scp_data_len = scpdata_len; \
\
return count; \
}
#define DEFINE_IPL_ATTR_SCP_DATA_RO(_prefix, _ipl_block, _size) \
IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
static struct bin_attribute sys_##_prefix##_scp_data_attr = \
__BIN_ATTR(scp_data, 0444, sys_##_prefix##_scp_data_show, \
NULL, _size)
#define DEFINE_IPL_ATTR_SCP_DATA_RW(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len, _size)\
IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
static struct bin_attribute sys_##_prefix##_scp_data_attr = \
__BIN_ATTR(scp_data, 0644, sys_##_prefix##_scp_data_show, \
sys_##_prefix##_scp_data_store, _size)
/*
* ipl section
*/
@ -377,71 +432,38 @@ static ssize_t sys_ipl_device_show(struct kobject *kobj,
static struct kobj_attribute sys_ipl_device_attr =
__ATTR(device, 0444, sys_ipl_device_show, NULL);
static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
static ssize_t sys_ipl_parameter_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
return memory_read_from_buffer(buf, count, &off, &ipl_block,
ipl_block.hdr.len);
}
static struct bin_attribute ipl_parameter_attr =
__BIN_ATTR(binary_parameter, 0444, ipl_parameter_read, NULL,
static struct bin_attribute sys_ipl_parameter_attr =
__BIN_ATTR(binary_parameter, 0444, sys_ipl_parameter_read, NULL,
PAGE_SIZE);
static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
unsigned int size = ipl_block.fcp.scp_data_len;
void *scp_data = &ipl_block.fcp.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
unsigned int size = ipl_block.nvme.scp_data_len;
void *scp_data = &ipl_block.nvme.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static ssize_t ipl_eckd_scp_data_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
unsigned int size = ipl_block.eckd.scp_data_len;
void *scp_data = &ipl_block.eckd.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static struct bin_attribute ipl_scp_data_attr =
__BIN_ATTR(scp_data, 0444, ipl_scp_data_read, NULL, PAGE_SIZE);
static struct bin_attribute ipl_nvme_scp_data_attr =
__BIN_ATTR(scp_data, 0444, ipl_nvme_scp_data_read, NULL, PAGE_SIZE);
static struct bin_attribute ipl_eckd_scp_data_attr =
__BIN_ATTR(scp_data, 0444, ipl_eckd_scp_data_read, NULL, PAGE_SIZE);
DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_fcp, ipl_block.fcp, PAGE_SIZE);
static struct bin_attribute *ipl_fcp_bin_attrs[] = {
&ipl_parameter_attr,
&ipl_scp_data_attr,
&sys_ipl_parameter_attr,
&sys_ipl_fcp_scp_data_attr,
NULL,
};
DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_nvme, ipl_block.nvme, PAGE_SIZE);
static struct bin_attribute *ipl_nvme_bin_attrs[] = {
&ipl_parameter_attr,
&ipl_nvme_scp_data_attr,
&sys_ipl_parameter_attr,
&sys_ipl_nvme_scp_data_attr,
NULL,
};
DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_eckd, ipl_block.eckd, PAGE_SIZE);
static struct bin_attribute *ipl_eckd_bin_attrs[] = {
&ipl_parameter_attr,
&ipl_eckd_scp_data_attr,
&sys_ipl_parameter_attr,
&sys_ipl_eckd_scp_data_attr,
NULL,
};
@ -780,44 +802,10 @@ static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
/* FCP reipl device attributes */
static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t size = reipl_block_fcp->fcp.scp_data_len;
void *scp_data = reipl_block_fcp->fcp.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t scpdata_len = count;
size_t padding;
if (off)
return -EINVAL;
memcpy(reipl_block_fcp->fcp.scp_data, buf, count);
if (scpdata_len % 8) {
padding = 8 - (scpdata_len % 8);
memset(reipl_block_fcp->fcp.scp_data + scpdata_len,
0, padding);
scpdata_len += padding;
}
reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len;
reipl_block_fcp->fcp.scp_data_len = scpdata_len;
return count;
}
static struct bin_attribute sys_reipl_fcp_scp_data_attr =
__BIN_ATTR(scp_data, 0644, reipl_fcp_scpdata_read,
reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_fcp, reipl_block_fcp->hdr,
reipl_block_fcp->fcp,
IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN,
DIAG308_SCPDATA_SIZE);
static struct bin_attribute *reipl_fcp_bin_attrs[] = {
&sys_reipl_fcp_scp_data_attr,
@ -938,44 +926,10 @@ static struct kobj_attribute sys_reipl_fcp_clear_attr =
/* NVME reipl device attributes */
static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t size = reipl_block_nvme->nvme.scp_data_len;
void *scp_data = reipl_block_nvme->nvme.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t scpdata_len = count;
size_t padding;
if (off)
return -EINVAL;
memcpy(reipl_block_nvme->nvme.scp_data, buf, count);
if (scpdata_len % 8) {
padding = 8 - (scpdata_len % 8);
memset(reipl_block_nvme->nvme.scp_data + scpdata_len,
0, padding);
scpdata_len += padding;
}
reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN + scpdata_len;
reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN + scpdata_len;
reipl_block_nvme->nvme.scp_data_len = scpdata_len;
return count;
}
static struct bin_attribute sys_reipl_nvme_scp_data_attr =
__BIN_ATTR(scp_data, 0644, reipl_nvme_scpdata_read,
reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE);
DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_nvme, reipl_block_nvme->hdr,
reipl_block_nvme->nvme,
IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN,
DIAG308_SCPDATA_SIZE);
static struct bin_attribute *reipl_nvme_bin_attrs[] = {
&sys_reipl_nvme_scp_data_attr,
@ -1071,44 +1025,10 @@ static struct attribute_group reipl_ccw_attr_group_lpar = {
/* ECKD reipl device attributes */
static ssize_t reipl_eckd_scpdata_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t size = reipl_block_eckd->eckd.scp_data_len;
void *scp_data = reipl_block_eckd->eckd.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static ssize_t reipl_eckd_scpdata_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t scpdata_len = count;
size_t padding;
if (off)
return -EINVAL;
memcpy(reipl_block_eckd->eckd.scp_data, buf, count);
if (scpdata_len % 8) {
padding = 8 - (scpdata_len % 8);
memset(reipl_block_eckd->eckd.scp_data + scpdata_len,
0, padding);
scpdata_len += padding;
}
reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN + scpdata_len;
reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN + scpdata_len;
reipl_block_eckd->eckd.scp_data_len = scpdata_len;
return count;
}
static struct bin_attribute sys_reipl_eckd_scp_data_attr =
__BIN_ATTR(scp_data, 0644, reipl_eckd_scpdata_read,
reipl_eckd_scpdata_write, DIAG308_SCPDATA_SIZE);
DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_eckd, reipl_block_eckd->hdr,
reipl_block_eckd->eckd,
IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN,
DIAG308_SCPDATA_SIZE);
static struct bin_attribute *reipl_eckd_bin_attrs[] = {
&sys_reipl_eckd_scp_data_attr,