static void chsc_process_sei_nt0(struct chsc_sei_nt0_area *sei_area)
{
/* which kind of information was stored? */
switch (sei_area->cc) {
case 1: /* link incident*/
chsc_process_sei_link_incident(sei_area);
break;
case 2: /* i/o resource accessibility */
chsc_process_sei_res_acc(sei_area);
break;
case 7: /* channel-path-availability information */
chsc_process_sei_chp_avail(sei_area);
break;
case 8: /* channel-path-configuration notification */
chsc_process_sei_chp_config(sei_area);
break;
case 12: /* scm change notification */
chsc_process_sei_scm_change(sei_area);
break;
case 14: /* scm available notification */
chsc_process_sei_scm_avail(sei_area);
break;
default: /* other stuff */
CIO_CRW_EVENT(2, "chsc: sei nt0 unhandled cc=%d\n",
sei_area->cc);
break;
}
/* Check if we might have lost some information. */
if (sei_area->flags & 0x40) {
CIO_CRW_EVENT(2, "chsc: event overflow\n");
css_schedule_eval_all();
}
}
static void chsc_process_sei_chp_avail(struct chsc_sei_nt0_area *sei_area)
{
struct channel_path *chp;
struct chp_id chpid;
u8 *data;
int num;
CIO_CRW_EVENT(4, "chsc: channel path availability information\n");
if (sei_area->rs != 0)
return;
data = sei_area->ccdf;
chp_id_init(&chpid);
for (num = 0; num <= __MAX_CHPID; num++) {
if (!chp_test_bit(data, num))
continue;
chpid.id = num;
CIO_CRW_EVENT(4, "Update information for channel path "
"%x.%02x\n", chpid.cssid, chpid.id);
chp = chpid_to_chp(chpid);
if (!chp) {
chp_new(chpid);
continue;
}
mutex_lock(&chp->lock);
chsc_determine_base_channel_path_desc(chpid, &chp->desc);
mutex_unlock(&chp->lock);
}
}
static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
{
do {
memset(sei, 0, sizeof(*sei));
sei->request.length = 0x0010;
sei->request.code = 0x000e;
sei->ntsm = ntsm;
if (chsc(sei))
break;
if (sei->response.code != 0x0001) {
CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
sei->response.code);
break;
}
CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
switch (sei->nt) {
case 0:
chsc_process_sei_nt0(&sei->u.nt0_area);
break;
case 2:
chsc_process_sei_nt2(&sei->u.nt2_area);
break;
default:
CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
break;
}
} while (sei->u.nt0_area.flags & 0x80);
}
/*
* Called from the machine check handler for subchannel report words.
*/
static void css_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
struct subchannel_id mchk_schid;
struct subchannel *sch;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW0 reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
if (crw1)
CIO_CRW_EVENT(2, "CRW1 reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw1->slct, crw1->oflw, crw1->chn, crw1->rsc,
crw1->anc, crw1->erc, crw1->rsid);
init_subchannel_id(&mchk_schid);
mchk_schid.sch_no = crw0->rsid;
if (crw1)
mchk_schid.ssid = (crw1->rsid >> 4) & 3;
if (crw0->erc == CRW_ERC_PMOD) {
sch = get_subchannel_by_schid(mchk_schid);
if (sch) {
css_update_ssd_info(sch);
put_device(&sch->dev);
}
}
/*
static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
{
int ret;
CIO_CRW_EVENT(4, "chsc: scm change notification\n");
if (sei_area->rs != 7)
return;
ret = scm_update_information();
if (ret)
CIO_CRW_EVENT(0, "chsc: updating change notification"
" failed (rc=%d).\n", ret);
}
static void chsc_process_sei_scm_avail(struct chsc_sei_nt0_area *sei_area)
{
int ret;
CIO_CRW_EVENT(4, "chsc: scm available information\n");
if (sei_area->rs != 7)
return;
ret = scm_process_availability_information();
if (ret)
CIO_CRW_EVENT(0, "chsc: process availability information"
" failed (rc=%d).\n", ret);
}
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;
}
static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
{
struct chp_config_data *data;
struct chp_id chpid;
int num;
CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
if (sei_area->rs != 0)
return;
data = (struct chp_config_data *) &(sei_area->ccdf);
chp_id_init(&chpid);
for (num = 0; num <= __MAX_CHPID; num++) {
if (!chp_test_bit(data->map, num))
continue;
chpid.id = num;
printk(KERN_WARNING "cio: processing configure event %d for "
"chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
switch (data->op) {
case 0:
chp_cfg_schedule(chpid, 1);
break;
case 1:
chp_cfg_schedule(chpid, 0);
break;
case 2:
chp_cfg_cancel_deconfigure(chpid);
break;
}
}
}
static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
{
struct chp_config_data *data;
struct chp_id chpid;
int num;
char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
if (sei_area->rs != 0)
return;
data = (struct chp_config_data *) &(sei_area->ccdf);
chp_id_init(&chpid);
for (num = 0; num <= __MAX_CHPID; num++) {
if (!chp_test_bit(data->map, num))
continue;
chpid.id = num;
pr_notice("Processing %s for channel path %x.%02x\n",
events[data->op], chpid.cssid, chpid.id);
switch (data->op) {
case 0:
chp_cfg_schedule(chpid, 1);
break;
case 1:
chp_cfg_schedule(chpid, 0);
break;
case 2:
chp_cfg_cancel_deconfigure(chpid);
break;
}
}
}
static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
{
struct chp_link link;
struct chp_id chpid;
int status;
CIO_CRW_EVENT(4, "chsc: resource accessibility event (rs=%02x, "
"rs_id=%04x)\n", sei_area->rs, sei_area->rsid);
if (sei_area->rs != 4)
return;
chp_id_init(&chpid);
chpid.id = sei_area->rsid;
/* allocate a new channel path structure, if needed */
status = chp_get_status(chpid);
if (status < 0)
chp_new(chpid);
else if (!status)
return;
memset(&link, 0, sizeof(struct chp_link));
link.chpid = chpid;
if ((sei_area->vf & 0xc0) != 0) {
link.fla = sei_area->fla;
if ((sei_area->vf & 0xc0) == 0xc0)
/* full link address */
link.fla_mask = 0xffff;
else
/* link address */
link.fla_mask = 0xff00;
}
s390_process_res_acc(&link);
}
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;
}
static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
{
struct chp_id chpid;
int id;
CIO_CRW_EVENT(4, "chsc: link incident (rs=%02x, rs_id=%04x)\n",
sei_area->rs, sei_area->rsid);
if (sei_area->rs != 4)
return;
id = __get_chpid_from_lir(sei_area->ccdf);
if (id < 0)
CIO_CRW_EVENT(4, "chsc: link incident - invalid LIR\n");
else {
chp_id_init(&chpid);
chpid.id = id;
chsc_chp_offline(chpid);
}
}
static void chsc_process_event_information(struct chsc_sei *sei, u64 ntsm)
{
static int ntsm_unsupported;
while (true) {
memset(sei, 0, sizeof(*sei));
sei->request.length = 0x0010;
sei->request.code = 0x000e;
if (!ntsm_unsupported)
sei->ntsm = ntsm;
if (chsc(sei))
break;
if (sei->response.code != 0x0001) {
CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x, ntsm=%llx)\n",
sei->response.code, sei->ntsm);
if (sei->response.code == 3 && sei->ntsm) {
/* Fallback for old firmware. */
ntsm_unsupported = 1;
continue;
}
break;
}
CIO_CRW_EVENT(2, "chsc: sei successful (nt=%d)\n", sei->nt);
switch (sei->nt) {
case 0:
chsc_process_sei_nt0(&sei->u.nt0_area);
break;
case 2:
chsc_process_sei_nt2(&sei->u.nt2_area);
break;
default:
CIO_CRW_EVENT(2, "chsc: unhandled nt: %d\n", sei->nt);
break;
}
if (!(sei->u.nt0_area.flags & 0x80))
break;
}
}
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;
}
/**
* chp_process_crw - process channel-path status change
* @crw0: channel report-word to handler
* @crw1: second channel-report word (always NULL)
* @overflow: crw overflow indication
*
* Handle channel-report-words indicating that the status of a channel-path
* has changed.
*/
static void chp_process_crw(struct crw *crw0, struct crw *crw1,
int overflow)
{
struct chp_id chpid;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
/*
* Check for solicited machine checks. These are
* created by reset channel path and need not be
* handled here.
*/
if (crw0->slct) {
CIO_CRW_EVENT(2, "solicited machine check for "
"channel path %02X\n", crw0->rsid);
return;
}
chp_id_init(&chpid);
chpid.id = crw0->rsid;
switch (crw0->erc) {
case CRW_ERC_IPARM: /* Path has come. */
if (!chp_is_registered(chpid))
chp_new(chpid);
chsc_chp_online(chpid);
break;
case CRW_ERC_PERRI: /* Path has gone. */
case CRW_ERC_PERRN:
chsc_chp_offline(chpid);
break;
default:
CIO_CRW_EVENT(2, "Don't know how to handle erc=%x\n",
crw0->erc);
}
}
static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
struct chsc_sei_area *sei_area;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
if (!sei_page)
return;
/* Access to sei_page is serialized through machine check handler
* thread, so no need for locking. */
sei_area = sei_page;
CIO_TRACE_EVENT(2, "prcss");
do {
memset(sei_area, 0, sizeof(*sei_area));
sei_area->request.length = 0x0010;
sei_area->request.code = 0x000e;
if (chsc(sei_area))
break;
if (sei_area->response.code == 0x0001) {
CIO_CRW_EVENT(4, "chsc: sei successful\n");
chsc_process_sei(sei_area);
} else {
CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
sei_area->response.code);
break;
}
} while (sei_area->flags & 0x80);
}
static void chsc_process_sei_nt2(struct chsc_sei_nt2_area *sei_area)
{
switch (sei_area->cc) {
case 1:
zpci_event_error(sei_area->ccdf);
break;
case 2:
zpci_event_availability(sei_area->ccdf);
break;
default:
CIO_CRW_EVENT(2, "chsc: sei nt2 unhandled cc=%d\n",
sei_area->cc);
break;
}
}
/*
* Handle channel subsystem related CRWs.
* Use store event information to find out what's going on.
*
* Note: Access to sei_page is serialized through machine check handler
* thread, so no need for locking.
*/
static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
{
struct chsc_sei *sei = sei_page;
if (overflow) {
css_schedule_eval_all();
return;
}
CIO_CRW_EVENT(2, "CRW reports slct=%d, oflw=%d, "
"chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n",
crw0->slct, crw0->oflw, crw0->chn, crw0->rsc, crw0->anc,
crw0->erc, crw0->rsid);
CIO_TRACE_EVENT(2, "prcss");
chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
}
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 __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;
}