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authorChristof Schmitt <christof.schmitt@de.ibm.com>2010-07-16 15:37:41 +0200
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:48:55 -0500
commitdcc18f48a2f1a44c5e8848f30d0cf53a8066c62a (patch)
tree6bf6e20f2309b0a077f328189d9f6656f554cedf
parentd23948ea38c4c6aa13e4df903dfdd71cabd0e6a3 (diff)
[SCSI] zfcp: Enable data division support for FCP devices
Try to enable data division support for FCP devices and indicate in the adapter status flag if it succeeded. Reviewed-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
-rw-r--r--arch/s390/include/asm/qdio.h6
-rw-r--r--drivers/s390/cio/qdio_setup.c2
-rw-r--r--drivers/s390/scsi/zfcp_def.h1
-rw-r--r--drivers/s390/scsi/zfcp_qdio.c11
4 files changed, 19 insertions, 1 deletions
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 0eaae626027..2ba63027629 100644
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -84,6 +84,7 @@ struct qdr {
#define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40
#define QIB_RFLAGS_ENABLE_QEBSM 0x80
+#define QIB_RFLAGS_ENABLE_DATA_DIV 0x02
/**
* struct qib - queue information block (QIB)
@@ -284,6 +285,9 @@ struct slsb {
u8 val[QDIO_MAX_BUFFERS_PER_Q];
} __attribute__ ((packed, aligned(256)));
+#define CHSC_AC2_DATA_DIV_AVAILABLE 0x0010
+#define CHSC_AC2_DATA_DIV_ENABLED 0x0002
+
struct qdio_ssqd_desc {
u8 flags;
u8:8;
@@ -332,6 +336,7 @@ typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
* @adapter_name: name for the adapter
* @qib_param_field_format: format for qib_parm_field
* @qib_param_field: pointer to 128 bytes or NULL, if no param field
+ * @qib_rflags: rflags to set
* @input_slib_elements: pointer to no_input_qs * 128 words of data or NULL
* @output_slib_elements: pointer to no_output_qs * 128 words of data or NULL
* @no_input_qs: number of input queues
@@ -348,6 +353,7 @@ struct qdio_initialize {
unsigned char adapter_name[8];
unsigned int qib_param_field_format;
unsigned char *qib_param_field;
+ unsigned char qib_rflags;
unsigned long *input_slib_elements;
unsigned long *output_slib_elements;
unsigned int no_input_qs;
diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c
index 6326b67c45d..34c7e4046df 100644
--- a/drivers/s390/cio/qdio_setup.c
+++ b/drivers/s390/cio/qdio_setup.c
@@ -368,6 +368,8 @@ static void setup_qib(struct qdio_irq *irq_ptr,
if (qebsm_possible())
irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
+ irq_ptr->qib.rflags |= init_data->qib_rflags;
+
irq_ptr->qib.qfmt = init_data->q_format;
if (init_data->no_input_qs)
irq_ptr->qib.isliba =
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index cb3640c6477..6c6374ba180 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -77,6 +77,7 @@ struct zfcp_reqlist;
#define ZFCP_STATUS_ADAPTER_HOST_CON_INIT 0x00000010
#define ZFCP_STATUS_ADAPTER_ERP_PENDING 0x00000100
#define ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED 0x00000200
+#define ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED 0x00000400
/* remote port status */
#define ZFCP_STATUS_PORT_PHYS_OPEN 0x00000001
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index a638278c602..c4559b29beb 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -283,6 +283,7 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
id->q_format = QDIO_ZFCP_QFMT;
memcpy(id->adapter_name, dev_name(&id->cdev->dev), 8);
ASCEBC(id->adapter_name, 8);
+ id->qib_rflags = QIB_RFLAGS_ENABLE_DATA_DIV;
id->qib_param_field_format = 0;
id->qib_param_field = NULL;
id->input_slib_elements = NULL;
@@ -294,8 +295,8 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
id->int_parm = (unsigned long) qdio;
id->input_sbal_addr_array = (void **) (qdio->res_q);
id->output_sbal_addr_array = (void **) (qdio->req_q);
-
}
+
/**
* zfcp_qdio_allocate - allocate queue memory and initialize QDIO data
* @adapter: pointer to struct zfcp_adapter
@@ -358,6 +359,7 @@ int zfcp_qdio_open(struct zfcp_qdio *qdio)
struct qdio_initialize init_data;
struct zfcp_adapter *adapter = qdio->adapter;
struct ccw_device *cdev = adapter->ccw_device;
+ struct qdio_ssqd_desc ssqd;
int cc;
if (atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)
@@ -368,6 +370,13 @@ int zfcp_qdio_open(struct zfcp_qdio *qdio)
if (qdio_establish(&init_data))
goto failed_establish;
+ if (qdio_get_ssqd_desc(init_data.cdev, &ssqd))
+ goto failed_qdio;
+
+ if (ssqd.qdioac2 & CHSC_AC2_DATA_DIV_ENABLED)
+ atomic_set_mask(ZFCP_STATUS_ADAPTER_DATA_DIV_ENABLED,
+ &qdio->adapter->status);
+
if (qdio_activate(cdev))
goto failed_qdio;