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path: root/drivers/s390/cio/chsc.c
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Diffstat (limited to 'drivers/s390/cio/chsc.c')
-rw-r--r--drivers/s390/cio/chsc.c433
1 files changed, 341 insertions, 92 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 1aaddea673e..e3bf885f4a6 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -1,8 +1,7 @@
/*
- * drivers/s390/cio/chsc.c
* S/390 common I/O routines -- channel subsystem call
*
- * Copyright IBM Corp. 1999,2010
+ * Copyright IBM Corp. 1999,2012
* Author(s): Ingo Adlung (adlung@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
* Arnd Bergmann (arndb@de.ibm.com)
@@ -15,11 +14,13 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/device.h>
+#include <linux/pci.h>
#include <asm/cio.h>
#include <asm/chpid.h>
#include <asm/chsc.h>
#include <asm/crw.h>
+#include <asm/isc.h>
#include "css.h"
#include "cio.h"
@@ -53,6 +54,12 @@ int chsc_error_from_response(int response)
return -EINVAL;
case 0x0004:
return -EOPNOTSUPP;
+ case 0x000b:
+ case 0x0107: /* "Channel busy" for the op 0x003d */
+ return -EBUSY;
+ case 0x0100:
+ case 0x0102:
+ return -ENOMEM;
default:
return -EIO;
}
@@ -139,6 +146,65 @@ out:
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);
+}
+EXPORT_SYMBOL_GPL(chsc_ssqd);
+
+/**
+ * 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);
+}
+EXPORT_SYMBOL_GPL(chsc_sadc);
+
static int s390_subchannel_remove_chpid(struct subchannel *sch, void *data)
{
spin_lock_irq(sch->lock);
@@ -172,26 +238,6 @@ void chsc_chp_offline(struct chp_id chpid)
for_each_subchannel_staged(s390_subchannel_remove_chpid, NULL, &link);
}
-static int s390_process_res_acc_new_sch(struct subchannel_id schid, void *data)
-{
- struct schib schib;
- /*
- * We don't know the device yet, but since a path
- * may be available now to the device we'll have
- * to do recognition again.
- * Since we don't have any idea about which chpid
- * that beast may be on we'll have to do a stsch
- * on all devices, grr...
- */
- if (stsch_err(schid, &schib))
- /* We're through */
- return -ENXIO;
-
- /* Put it on the slow path. */
- css_schedule_eval(schid);
- return 0;
-}
-
static int __s390_process_res_acc(struct subchannel *sch, void *data)
{
spin_lock_irq(sch->lock);
@@ -222,8 +268,8 @@ static void s390_process_res_acc(struct chp_link *link)
* The more information we have (info), the less scanning
* will we have to do.
*/
- for_each_subchannel_staged(__s390_process_res_acc,
- s390_process_res_acc_new_sch, link);
+ for_each_subchannel_staged(__s390_process_res_acc, NULL, link);
+ css_schedule_reprobe();
}
static int
@@ -256,26 +302,46 @@ __get_chpid_from_lir(void *data)
return (u16) (lir->indesc[0]&0x000000ff);
}
-struct chsc_sei_area {
- struct chsc_header request;
+struct chsc_sei_nt0_area {
+ u8 flags;
+ u8 vf; /* validity flags */
+ u8 rs; /* reporting source */
+ u8 cc; /* content code */
+ u16 fla; /* full link address */
+ u16 rsid; /* reporting source id */
u32 reserved1;
u32 reserved2;
- u32 reserved3;
- struct chsc_header response;
- u32 reserved4;
- u8 flags;
- u8 vf; /* validity flags */
- u8 rs; /* reporting source */
- u8 cc; /* content code */
- u16 fla; /* full link address */
- u16 rsid; /* reporting source id */
- u32 reserved5;
- u32 reserved6;
- u8 ccdf[4096 - 16 - 24]; /* content-code dependent field */
/* ccdf has to be big enough for a link-incident record */
-} __attribute__ ((packed));
-
-static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
+ u8 ccdf[PAGE_SIZE - 24 - 16]; /* content-code dependent field */
+} __packed;
+
+struct chsc_sei_nt2_area {
+ u8 flags; /* p and v bit */
+ u8 reserved1;
+ u8 reserved2;
+ u8 cc; /* content code */
+ u32 reserved3[13];
+ u8 ccdf[PAGE_SIZE - 24 - 56]; /* content-code dependent field */
+} __packed;
+
+#define CHSC_SEI_NT0 (1ULL << 63)
+#define CHSC_SEI_NT2 (1ULL << 61)
+
+struct chsc_sei {
+ struct chsc_header request;
+ u32 reserved1;
+ u64 ntsm; /* notification type mask */
+ struct chsc_header response;
+ u32 :24;
+ u8 nt;
+ union {
+ struct chsc_sei_nt0_area nt0_area;
+ struct chsc_sei_nt2_area nt2_area;
+ u8 nt_area[PAGE_SIZE - 24];
+ } u;
+} __packed;
+
+static void chsc_process_sei_link_incident(struct chsc_sei_nt0_area *sei_area)
{
struct chp_id chpid;
int id;
@@ -294,7 +360,7 @@ static void chsc_process_sei_link_incident(struct chsc_sei_area *sei_area)
}
}
-static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
+static void chsc_process_sei_res_acc(struct chsc_sei_nt0_area *sei_area)
{
struct chp_link link;
struct chp_id chpid;
@@ -326,13 +392,43 @@ static void chsc_process_sei_res_acc(struct chsc_sei_area *sei_area)
s390_process_res_acc(&link);
}
+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);
+ chp_update_desc(chp);
+ mutex_unlock(&chp->lock);
+ }
+}
+
struct chp_config_data {
u8 map[32];
u8 op;
u8 pc;
};
-static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
+static void chsc_process_sei_chp_config(struct chsc_sei_nt0_area *sei_area)
{
struct chp_config_data *data;
struct chp_id chpid;
@@ -364,34 +460,139 @@ static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
}
}
-static void chsc_process_sei(struct chsc_sei_area *sei_area)
+static void chsc_process_sei_scm_change(struct chsc_sei_nt0_area *sei_area)
{
- /* 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();
+ 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);
+}
+
+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;
}
+}
+
+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 accessibiliy */
+ 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(4, "chsc: unhandled sei content code %d\n",
+ 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_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;
+ }
+}
+
+/*
+ * 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_area *sei_area;
+ struct chsc_sei *sei = sei_page;
if (overflow) {
css_schedule_eval_all();
@@ -401,29 +602,9 @@ static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
"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);
+ chsc_process_event_information(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
}
void chsc_chp_online(struct chp_id chpid)
@@ -441,6 +622,7 @@ void chsc_chp_online(struct chp_id chpid)
css_wait_for_slow_path();
for_each_subchannel_staged(__s390_process_res_acc, NULL,
&link);
+ css_schedule_reprobe();
}
}
@@ -475,19 +657,6 @@ static int s390_subchannel_vary_chpid_on(struct subchannel *sch, void *data)
return 0;
}
-static int
-__s390_vary_chpid_on(struct subchannel_id schid, void *data)
-{
- struct schib schib;
-
- if (stsch_err(schid, &schib))
- /* We're through */
- return -ENXIO;
- /* Put it on the slow path. */
- css_schedule_eval(schid);
- return 0;
-}
-
/**
* chsc_chp_vary - propagate channel-path vary operation to subchannels
* @chpid: channl-path ID
@@ -496,23 +665,21 @@ __s390_vary_chpid_on(struct subchannel_id schid, void *data)
int chsc_chp_vary(struct chp_id chpid, int on)
{
struct channel_path *chp = chpid_to_chp(chpid);
- struct chp_link link;
- memset(&link, 0, sizeof(struct chp_link));
- link.chpid = chpid;
/* Wait until previous actions have settled. */
css_wait_for_slow_path();
/*
* Redo PathVerification on the devices the chpid connects to
*/
if (on) {
- /* Try to update the channel path descritor. */
- chsc_determine_base_channel_path_desc(chpid, &chp->desc);
+ /* Try to update the channel path description. */
+ chp_update_desc(chp);
for_each_subchannel_staged(s390_subchannel_vary_chpid_on,
- __s390_vary_chpid_on, &link);
+ NULL, &chpid);
+ css_schedule_reprobe();
} else
for_each_subchannel_staged(s390_subchannel_vary_chpid_off,
- NULL, &link);
+ NULL, &chpid);
return 0;
}
@@ -695,6 +862,26 @@ out:
return ret;
}
+int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
+ struct channel_path_desc_fmt1 *desc)
+{
+ struct chsc_response_struct *chsc_resp;
+ struct chsc_scpd *scpd_area;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&chsc_page_lock, flags);
+ scpd_area = chsc_page;
+ ret = chsc_determine_channel_path_desc(chpid, 0, 0, 1, 0, scpd_area);
+ if (ret)
+ goto out;
+ chsc_resp = (void *)&scpd_area->response;
+ memcpy(desc, &chsc_resp->data, sizeof(*desc));
+out:
+ spin_unlock_irqrestore(&chsc_page_lock, flags);
+ return ret;
+}
+
static void
chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv,
struct cmg_chars *chars)
@@ -999,3 +1186,65 @@ out:
return rc;
}
EXPORT_SYMBOL_GPL(chsc_siosl);
+
+/**
+ * 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;
+}
+EXPORT_SYMBOL_GPL(chsc_scm_info);
+
+/**
+ * chsc_pnso_brinfo() - Perform Network-Subchannel Operation, Bridge Info.
+ * @schid: id of the subchannel on which PNSO is performed
+ * @brinfo_area: request and response block for the operation
+ * @resume_token: resume token for multiblock response
+ * @cnc: Boolean change-notification control
+ *
+ * brinfo_area must be allocated by the caller with get_zeroed_page(GFP_KERNEL)
+ *
+ * Returns 0 on success.
+ */
+int chsc_pnso_brinfo(struct subchannel_id schid,
+ struct chsc_pnso_area *brinfo_area,
+ struct chsc_brinfo_resume_token resume_token,
+ int cnc)
+{
+ memset(brinfo_area, 0, sizeof(*brinfo_area));
+ brinfo_area->request.length = 0x0030;
+ brinfo_area->request.code = 0x003d; /* network-subchannel operation */
+ brinfo_area->m = schid.m;
+ brinfo_area->ssid = schid.ssid;
+ brinfo_area->sch = schid.sch_no;
+ brinfo_area->cssid = schid.cssid;
+ brinfo_area->oc = 0; /* Store-network-bridging-information list */
+ brinfo_area->resume_token = resume_token;
+ brinfo_area->n = (cnc != 0);
+ if (chsc(brinfo_area))
+ return -EIO;
+ return chsc_error_from_response(brinfo_area->response.code);
+}
+EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 18:30:17 +0000