int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
int c, int m, void *page)
{
struct chsc_scpd *scpd_area;
int ccode, ret;
if ((rfmt == 1) && !css_general_characteristics.fcs)
return -EINVAL;
if ((rfmt == 2) && !css_general_characteristics.cib)
return -EINVAL;
memset(page, 0, PAGE_SIZE);
scpd_area = page;
scpd_area->request.length = 0x0010;
scpd_area->request.code = 0x0002;
scpd_area->cssid = chpid.cssid;
scpd_area->first_chpid = chpid.id;
scpd_area->last_chpid = chpid.id;
scpd_area->m = m;
scpd_area->c = c;
scpd_area->fmt = fmt;
scpd_area->rfmt = rfmt;
ccode = chsc(scpd_area);
if (ccode > 0)
return (ccode == 3) ? -ENODEV : -EBUSY;
ret = chsc_error_from_response(scpd_area->response.code);
if (ret)
CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
scpd_area->response.code);
return ret;
}
/**
* chsc_sadc() - set adapter device controls (SADC)
* @schid: id of the subchannel on which SADC is performed
* @scssc: request and response block for SADC
* @summary_indicator_addr: summary indicator address
* @subchannel_indicator_addr: subchannel indicator address
*
* Returns 0 on success.
*/
int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,
u64 summary_indicator_addr, u64 subchannel_indicator_addr)
{
memset(scssc, 0, sizeof(*scssc));
scssc->request.length = 0x0fe0;
scssc->request.code = 0x0021;
scssc->operation_code = 0;
scssc->summary_indicator_addr = summary_indicator_addr;
scssc->subchannel_indicator_addr = subchannel_indicator_addr;
scssc->ks = PAGE_DEFAULT_KEY >> 4;
scssc->kc = PAGE_DEFAULT_KEY >> 4;
scssc->isc = QDIO_AIRQ_ISC;
scssc->schid = schid;
/* enable the time delay disablement facility */
if (css_general_characteristics.aif_tdd)
scssc->word_with_d_bit = 0x10000000;
if (chsc(scssc))
return -EIO;
return chsc_error_from_response(scssc->response.code);
}
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
int c, int m,
struct chsc_response_struct *resp)
{
int ccode, ret;
struct {
struct chsc_header request;
u32 : 2;
u32 m : 1;
u32 c : 1;
u32 fmt : 4;
u32 cssid : 8;
u32 : 4;
u32 rfmt : 4;
u32 first_chpid : 8;
u32 : 24;
u32 last_chpid : 8;
u32 zeroes1;
struct chsc_header response;
u8 data[PAGE_SIZE - 20];
} __attribute__ ((packed)) *scpd_area;
if ((rfmt == 1) && !css_general_characteristics.fcs)
return -EINVAL;
if ((rfmt == 2) && !css_general_characteristics.cib)
return -EINVAL;
scpd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!scpd_area)
return -ENOMEM;
scpd_area->request.length = 0x0010;
scpd_area->request.code = 0x0002;
scpd_area->cssid = chpid.cssid;
scpd_area->first_chpid = chpid.id;
scpd_area->last_chpid = chpid.id;
scpd_area->m = m;
scpd_area->c = c;
scpd_area->fmt = fmt;
scpd_area->rfmt = rfmt;
ccode = chsc(scpd_area);
if (ccode > 0) {
ret = (ccode == 3) ? -ENODEV : -EBUSY;
goto out;
}
ret = chsc_error_from_response(scpd_area->response.code);
if (ret == 0)
/* Success. */
memcpy(resp, &scpd_area->response, scpd_area->response.length);
else
CIO_CRW_EVENT(2, "chsc: scpd failed (rc=%04x)\n",
scpd_area->response.code);
out:
free_page((unsigned long)scpd_area);
return ret;
}
int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
{
unsigned long page;
struct chsc_ssd_area *ssd_area;
int ccode;
int ret;
int i;
int mask;
page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!page)
return -ENOMEM;
ssd_area = (struct chsc_ssd_area *) page;
ssd_area->request.length = 0x0010;
ssd_area->request.code = 0x0004;
ssd_area->ssid = schid.ssid;
ssd_area->f_sch = schid.sch_no;
ssd_area->l_sch = schid.sch_no;
ccode = chsc(ssd_area);
/* Check response. */
if (ccode > 0) {
ret = (ccode == 3) ? -ENODEV : -EBUSY;
goto out_free;
}
ret = chsc_error_from_response(ssd_area->response.code);
if (ret != 0) {
CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
schid.ssid, schid.sch_no,
ssd_area->response.code);
goto out_free;
}
if (!ssd_area->sch_valid) {
ret = -ENODEV;
goto out_free;
}
/* Copy data */
ret = 0;
memset(ssd, 0, sizeof(struct chsc_ssd_info));
if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
(ssd_area->st != SUBCHANNEL_TYPE_MSG))
goto out_free;
ssd->path_mask = ssd_area->path_mask;
ssd->fla_valid_mask = ssd_area->fla_valid_mask;
for (i = 0; i < 8; i++) {
mask = 0x80 >> i;
if (ssd_area->path_mask & mask) {
chp_id_init(&ssd->chpid[i]);
ssd->chpid[i].id = ssd_area->chpid[i];
}
if (ssd_area->fla_valid_mask & mask)
ssd->fla[i] = ssd_area->fla[i];
}
out_free:
free_page(page);
return ret;
}
int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
{
struct chsc_ssd_area *ssd_area;
unsigned long flags;
int ccode;
int ret;
int i;
int mask;
spin_lock_irqsave(&chsc_page_lock, flags);
memset(chsc_page, 0, PAGE_SIZE);
ssd_area = chsc_page;
ssd_area->request.length = 0x0010;
ssd_area->request.code = 0x0004;
ssd_area->ssid = schid.ssid;
ssd_area->f_sch = schid.sch_no;
ssd_area->l_sch = schid.sch_no;
ccode = chsc(ssd_area);
/* Check response. */
if (ccode > 0) {
ret = (ccode == 3) ? -ENODEV : -EBUSY;
goto out;
}
ret = chsc_error_from_response(ssd_area->response.code);
if (ret != 0) {
CIO_MSG_EVENT(2, "chsc: ssd failed for 0.%x.%04x (rc=%04x)\n",
schid.ssid, schid.sch_no,
ssd_area->response.code);
goto out;
}
if (!ssd_area->sch_valid) {
ret = -ENODEV;
goto out;
}
/* Copy data */
ret = 0;
memset(ssd, 0, sizeof(struct chsc_ssd_info));
if ((ssd_area->st != SUBCHANNEL_TYPE_IO) &&
(ssd_area->st != SUBCHANNEL_TYPE_MSG))
goto out;
ssd->path_mask = ssd_area->path_mask;
ssd->fla_valid_mask = ssd_area->fla_valid_mask;
for (i = 0; i < 8; i++) {
mask = 0x80 >> i;
if (ssd_area->path_mask & mask) {
chp_id_init(&ssd->chpid[i]);
ssd->chpid[i].id = ssd_area->chpid[i];
}
if (ssd_area->fla_valid_mask & mask)
ssd->fla[i] = ssd_area->fla[i];
}
out:
spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}
int __chsc_do_secm(struct channel_subsystem *css, int enable)
{
struct {
struct chsc_header request;
u32 operation_code : 2;
u32 : 30;
u32 key : 4;
u32 : 28;
u32 zeroes1;
u32 cub_addr1;
u32 zeroes2;
u32 cub_addr2;
u32 reserved[13];
struct chsc_header response;
u32 status : 8;
u32 : 4;
u32 fmt : 4;
u32 : 16;
} __attribute__ ((packed)) *secm_area;
int ret, ccode;
spin_lock_irq(&chsc_page_lock);
memset(chsc_page, 0, PAGE_SIZE);
secm_area = chsc_page;
secm_area->request.length = 0x0050;
secm_area->request.code = 0x0016;
secm_area->key = PAGE_DEFAULT_KEY >> 4;
secm_area->cub_addr1 = (u64)(unsigned long)css->cub_addr1;
secm_area->cub_addr2 = (u64)(unsigned long)css->cub_addr2;
secm_area->operation_code = enable ? 0 : 1;
ccode = chsc(secm_area);
if (ccode > 0) {
ret = (ccode == 3) ? -ENODEV : -EBUSY;
goto out;
}
switch (secm_area->response.code) {
case 0x0102:
case 0x0103:
ret = -EINVAL;
break;
default:
ret = chsc_error_from_response(secm_area->response.code);
}
if (ret != 0)
CIO_CRW_EVENT(2, "chsc: secm failed (rc=%04x)\n",
secm_area->response.code);
out:
spin_unlock_irq(&chsc_page_lock);
return ret;
}
/**
* chsc_ssqd() - store subchannel QDIO data (SSQD)
* @schid: id of the subchannel on which SSQD is performed
* @ssqd: request and response block for SSQD
*
* Returns 0 on success.
*/
int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd)
{
memset(ssqd, 0, sizeof(*ssqd));
ssqd->request.length = 0x0010;
ssqd->request.code = 0x0024;
ssqd->first_sch = schid.sch_no;
ssqd->last_sch = schid.sch_no;
ssqd->ssid = schid.ssid;
if (chsc(ssqd))
return -EIO;
return chsc_error_from_response(ssqd->response.code);
}
int chsc_enable_facility(int operation_code)
{
unsigned long flags;
int ret;
struct {
struct chsc_header request;
u8 reserved1:4;
u8 format:4;
u8 reserved2;
u16 operation_code;
u32 reserved3;
u32 reserved4;
u32 operation_data_area[252];
struct chsc_header response;
u32 reserved5:4;
u32 format2:4;
u32 reserved6:24;
} __attribute__ ((packed)) *sda_area;
spin_lock_irqsave(&chsc_page_lock, flags);
memset(chsc_page, 0, PAGE_SIZE);
sda_area = chsc_page;
sda_area->request.length = 0x0400;
sda_area->request.code = 0x0031;
sda_area->operation_code = operation_code;
ret = chsc(sda_area);
if (ret > 0) {
ret = (ret == 3) ? -ENODEV : -EBUSY;
goto out;
}
switch (sda_area->response.code) {
case 0x0101:
ret = -EOPNOTSUPP;
break;
default:
ret = chsc_error_from_response(sda_area->response.code);
}
if (ret != 0)
CIO_CRW_EVENT(2, "chsc: sda (oc=%x) failed (rc=%04x)\n",
operation_code, sda_area->response.code);
out:
spin_unlock_irqrestore(&chsc_page_lock, flags);
return ret;
}
int chsc_siosl(struct subchannel_id schid)
{
struct {
struct chsc_header request;
u32 word1;
struct subchannel_id sid;
u32 word3;
struct chsc_header response;
u32 word[11];
} __attribute__ ((packed)) *siosl_area;
unsigned long flags;
int ccode;
int rc;
spin_lock_irqsave(&chsc_page_lock, flags);
memset(chsc_page, 0, PAGE_SIZE);
siosl_area = chsc_page;
siosl_area->request.length = 0x0010;
siosl_area->request.code = 0x0046;
siosl_area->word1 = 0x80000000;
siosl_area->sid = schid;
ccode = chsc(siosl_area);
if (ccode > 0) {
if (ccode == 3)
rc = -ENODEV;
else
rc = -EBUSY;
CIO_MSG_EVENT(2, "chsc: chsc failed for 0.%x.%04x (ccode=%d)\n",
schid.ssid, schid.sch_no, ccode);
goto out;
}
rc = chsc_error_from_response(siosl_area->response.code);
if (rc)
CIO_MSG_EVENT(2, "chsc: siosl failed for 0.%x.%04x (rc=%04x)\n",
schid.ssid, schid.sch_no,
siosl_area->response.code);
else
CIO_MSG_EVENT(4, "chsc: siosl succeeded for 0.%x.%04x\n",
schid.ssid, schid.sch_no);
out:
spin_unlock_irqrestore(&chsc_page_lock, flags);
return rc;
}
/**
* chsc_scm_info() - store SCM information (SSI)
* @scm_area: request and response block for SSI
* @token: continuation token
*
* Returns 0 on success.
*/
int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
{
int ccode, ret;
memset(scm_area, 0, sizeof(*scm_area));
scm_area->request.length = 0x0020;
scm_area->request.code = 0x004C;
scm_area->reqtok = token;
ccode = chsc(scm_area);
if (ccode > 0) {
ret = (ccode == 3) ? -ENODEV : -EBUSY;
goto out;
}
ret = chsc_error_from_response(scm_area->response.code);
if (ret != 0)
CIO_MSG_EVENT(2, "chsc: scm info failed (rc=%04x)\n",
scm_area->response.code);
out:
return ret;
}
int __init
chsc_determine_css_characteristics(void)
{
int result;
struct {
struct chsc_header request;
u32 reserved1;
u32 reserved2;
u32 reserved3;
struct chsc_header response;
u32 reserved4;
u32 general_char[510];
u32 chsc_char[508];
} __attribute__ ((packed)) *scsc_area;
spin_lock_irq(&chsc_page_lock);
memset(chsc_page, 0, PAGE_SIZE);
scsc_area = chsc_page;
scsc_area->request.length = 0x0010;
scsc_area->request.code = 0x0010;
result = chsc(scsc_area);
if (result) {
result = (result == 3) ? -ENODEV : -EBUSY;
goto exit;
}
result = chsc_error_from_response(scsc_area->response.code);
if (result == 0) {
memcpy(&css_general_characteristics, scsc_area->general_char,
sizeof(css_general_characteristics));
memcpy(&css_chsc_characteristics, scsc_area->chsc_char,
sizeof(css_chsc_characteristics));
} else
CIO_CRW_EVENT(2, "chsc: scsc failed (rc=%04x)\n",
scsc_area->response.code);
exit:
spin_unlock_irq(&chsc_page_lock);
return result;
}
int chsc_get_channel_measurement_chars(struct channel_path *chp)
{
struct cmg_chars *cmg_chars;
int ccode, ret;
struct {
struct chsc_header request;
u32 : 24;
u32 first_chpid : 8;
u32 : 24;
u32 last_chpid : 8;
u32 zeroes1;
struct chsc_header response;
u32 zeroes2;
u32 not_valid : 1;
u32 shared : 1;
u32 : 22;
u32 chpid : 8;
u32 cmcv : 5;
u32 : 11;
u32 cmgq : 8;
u32 cmg : 8;
u32 zeroes3;
u32 data[NR_MEASUREMENT_CHARS];
} __attribute__ ((packed)) *scmc_area;
chp->cmg_chars = NULL;
cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL);
if (!cmg_chars)
return -ENOMEM;
spin_lock_irq(&chsc_page_lock);
memset(chsc_page, 0, PAGE_SIZE);
scmc_area = chsc_page;
scmc_area->request.length = 0x0010;
scmc_area->request.code = 0x0022;
scmc_area->first_chpid = chp->chpid.id;
scmc_area->last_chpid = chp->chpid.id;
ccode = chsc(scmc_area);
if (ccode > 0) {
ret = (ccode == 3) ? -ENODEV : -EBUSY;
goto out;
}
ret = chsc_error_from_response(scmc_area->response.code);
if (ret) {
CIO_CRW_EVENT(2, "chsc: scmc failed (rc=%04x)\n",
scmc_area->response.code);
goto out;
}
if (scmc_area->not_valid) {
chp->cmg = -1;
chp->shared = -1;
goto out;
}
chp->cmg = scmc_area->cmg;
chp->shared = scmc_area->shared;
if (chp->cmg != 2 && chp->cmg != 3) {
/* No cmg-dependent data. */
goto out;
}
chp->cmg_chars = cmg_chars;
chsc_initialize_cmg_chars(chp, scmc_area->cmcv,
(struct cmg_chars *) &scmc_area->data);
out:
spin_unlock_irq(&chsc_page_lock);
if (!chp->cmg_chars)
kfree(cmg_chars);
return ret;
}