[S390] qdio (new feature): enhancing info-retrieval from QDIO-adapters
Next generation of OSA adapters allows retrieval of further self-describing
infos. This is the preparational infrastructure patch for further exploitation
in the qeth driver.
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index b1d18aa..c359386 100644
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -2217,9 +2217,78 @@
return cc;
}
+static int
+qdio_get_ssqd_information(struct subchannel_id *schid,
+ struct qdio_chsc_ssqd **ssqd_area)
+{
+ int result;
+
+ QDIO_DBF_TEXT0(0, setup, "getssqd");
+ *ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
+ if (!ssqd_area) {
+ QDIO_PRINT_WARN("Could not get memory for chsc on sch x%x.\n",
+ schid->sch_no);
+ return -ENOMEM;
+ }
+
+ (*ssqd_area)->request = (struct chsc_header) {
+ .length = 0x0010,
+ .code = 0x0024,
+ };
+ (*ssqd_area)->first_sch = schid->sch_no;
+ (*ssqd_area)->last_sch = schid->sch_no;
+ (*ssqd_area)->ssid = schid->ssid;
+ result = chsc(*ssqd_area);
+
+ if (result) {
+ QDIO_PRINT_WARN("CHSC returned cc %i on sch 0.%x.%x.\n",
+ result, schid->ssid, schid->sch_no);
+ goto out;
+ }
+
+ if ((*ssqd_area)->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
+ QDIO_PRINT_WARN("CHSC response is 0x%x on sch 0.%x.%x.\n",
+ (*ssqd_area)->response.code,
+ schid->ssid, schid->sch_no);
+ goto out;
+ }
+ if (!((*ssqd_area)->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
+ !((*ssqd_area)->flags & CHSC_FLAG_VALIDITY) ||
+ ((*ssqd_area)->sch != schid->sch_no)) {
+ QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
+ "using all SIGAs.\n",
+ schid->ssid, schid->sch_no);
+ goto out;
+ }
+ return 0;
+out:
+ return -EINVAL;
+}
+
+int
+qdio_get_ssqd_pct(struct ccw_device *cdev)
+{
+ struct qdio_chsc_ssqd *ssqd_area;
+ struct subchannel_id schid;
+ char dbf_text[15];
+ int rc;
+ int pct = 0;
+
+ QDIO_DBF_TEXT0(0, setup, "getpct");
+ schid = ccw_device_get_subchannel_id(cdev);
+ rc = qdio_get_ssqd_information(&schid, &ssqd_area);
+ if (!rc)
+ pct = (int)ssqd_area->pct;
+ if (rc != -ENOMEM)
+ mempool_free(ssqd_area, qdio_mempool_scssc);
+ sprintf(dbf_text, "pct: %d", pct);
+ QDIO_DBF_TEXT2(0, setup, dbf_text);
+ return pct;
+}
+EXPORT_SYMBOL(qdio_get_ssqd_pct);
+
static void
-qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
- unsigned long token)
+qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned long token)
{
struct qdio_q *q;
int i;
@@ -2227,7 +2296,7 @@
char dbf_text[15];
/*check if QEBSM is disabled */
- if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
+ if (!(irq_ptr->is_qebsm) || !(irq_ptr->qdioac & 0x01)) {
irq_ptr->is_qebsm = 0;
irq_ptr->sch_token = 0;
irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
@@ -2256,102 +2325,27 @@
}
static void
-qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
+qdio_get_ssqd_siga(struct qdio_irq *irq_ptr)
{
- int result;
- unsigned char qdioac;
- struct {
- struct chsc_header request;
- u16 reserved1:10;
- u16 ssid:2;
- u16 fmt:4;
- u16 first_sch;
- u16 reserved2;
- u16 last_sch;
- u32 reserved3;
- struct chsc_header response;
- u32 reserved4;
- u8 flags;
- u8 reserved5;
- u16 sch;
- u8 qfmt;
- u8 parm;
- u8 qdioac1;
- u8 sch_class;
- u8 reserved7;
- u8 icnt;
- u8 reserved8;
- u8 ocnt;
- u8 reserved9;
- u8 mbccnt;
- u16 qdioac2;
- u64 sch_token;
- } *ssqd_area;
+ int rc;
+ struct qdio_chsc_ssqd *ssqd_area;
QDIO_DBF_TEXT0(0,setup,"getssqd");
- qdioac = 0;
- ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
- if (!ssqd_area) {
- QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
- "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
+ irq_ptr->qdioac = 0;
+ rc = qdio_get_ssqd_information(&irq_ptr->schid, &ssqd_area);
+ if (rc) {
+ QDIO_PRINT_WARN("using all SIGAs for sch x%x.n",
+ irq_ptr->schid.sch_no);
irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
irq_ptr->is_qebsm = 0;
- irq_ptr->sch_token = 0;
- irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
- return;
- }
+ } else
+ irq_ptr->qdioac = ssqd_area->qdioac1;
- ssqd_area->request = (struct chsc_header) {
- .length = 0x0010,
- .code = 0x0024,
- };
- ssqd_area->first_sch = irq_ptr->schid.sch_no;
- ssqd_area->last_sch = irq_ptr->schid.sch_no;
- ssqd_area->ssid = irq_ptr->schid.ssid;
- result = chsc(ssqd_area);
-
- if (result) {
- QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
- "SIGAs for sch 0.%x.%x.\n", result,
- irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
- qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
- CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
- CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
- irq_ptr->is_qebsm = 0;
- goto out;
- }
-
- if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
- QDIO_PRINT_WARN("response upon checking SIGA needs " \
- "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
- ssqd_area->response.code,
- irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
- qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
- CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
- CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
- irq_ptr->is_qebsm = 0;
- goto out;
- }
- if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
- !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
- (ssqd_area->sch != irq_ptr->schid.sch_no)) {
- QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
- "using all SIGAs.\n",
- irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
- qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
- CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
- CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
- irq_ptr->is_qebsm = 0;
- goto out;
- }
- qdioac = ssqd_area->qdioac1;
-out:
- qdio_check_subchannel_qebsm(irq_ptr, qdioac,
- ssqd_area->sch_token);
- mempool_free(ssqd_area, qdio_mempool_scssc);
- irq_ptr->qdioac = qdioac;
+ qdio_check_subchannel_qebsm(irq_ptr, ssqd_area->sch_token);
+ if (rc != -ENOMEM)
+ mempool_free(ssqd_area, qdio_mempool_scssc);
}
static unsigned int
@@ -3227,7 +3221,7 @@
return -EIO;
}
- qdio_get_ssqd_information(irq_ptr);
+ qdio_get_ssqd_siga(irq_ptr);
/* if this gets set once, we're running under VM and can omit SVSes */
if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
omit_svs=1;
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index da8a272..c3df6b2 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -406,6 +406,34 @@
#define CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS 0x08
#define CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS 0x04
+struct qdio_chsc_ssqd {
+ struct chsc_header request;
+ u16 reserved1:10;
+ u16 ssid:2;
+ u16 fmt:4;
+ u16 first_sch;
+ u16 reserved2;
+ u16 last_sch;
+ u32 reserved3;
+ struct chsc_header response;
+ u32 reserved4;
+ u8 flags;
+ u8 reserved5;
+ u16 sch;
+ u8 qfmt;
+ u8 parm;
+ u8 qdioac1;
+ u8 sch_class;
+ u8 pct;
+ u8 icnt;
+ u8 reserved7;
+ u8 ocnt;
+ u8 reserved8;
+ u8 mbccnt;
+ u16 qdioac2;
+ u64 sch_token;
+};
+
struct qdio_perf_stats {
#ifdef CONFIG_64BIT
atomic64_t tl_runs;