s390/qdio: bridgeport support - CHSC part
authorEugene Crosser <Eugene.Crosser@ru.ibm.com>
Tue, 14 Jan 2014 14:54:12 +0000 (15:54 +0100)
committerDavid S. Miller <davem@davemloft.net>
Wed, 15 Jan 2014 22:48:01 +0000 (14:48 -0800)
Introduce function for the "Perform network-subchannel operation"
CHSC command with operation code "bridgeport information",
and bit definitions for "characteristics" pertaning to this command.

Signed-off-by: Eugene Crosser <eugene.crosser@ru.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
arch/s390/include/asm/css_chars.h
arch/s390/include/asm/qdio.h
drivers/s390/cio/chsc.c
drivers/s390/cio/chsc.h
drivers/s390/cio/qdio_main.c

index 7e1c917..09d1dd4 100644 (file)
@@ -29,6 +29,8 @@ struct css_general_char {
        u32 fcx : 1;     /* bit 88 */
        u32 : 19;
        u32 alt_ssi : 1; /* bit 108 */
+       u32:1;
+       u32 narf:1;      /* bit 110 */
 } __packed;
 
 extern struct css_general_char css_general_characteristics;
index 57d0d7e..0a1abf1 100644 (file)
@@ -378,6 +378,34 @@ struct qdio_initialize {
        struct qdio_outbuf_state *output_sbal_state_array;
 };
 
+/**
+ * enum qdio_brinfo_entry_type - type of address entry for qdio_brinfo_desc()
+ * @l3_ipv6_addr: entry contains IPv6 address
+ * @l3_ipv4_addr: entry contains IPv4 address
+ * @l2_addr_lnid: entry contains MAC address and VLAN ID
+ */
+enum qdio_brinfo_entry_type {l3_ipv6_addr, l3_ipv4_addr, l2_addr_lnid};
+
+/**
+ * struct qdio_brinfo_entry_XXX - Address entry for qdio_brinfo_desc()
+ * @nit:  Network interface token
+ * @addr: Address of one of the three types
+ *
+ * The struct is passed to the callback function by qdio_brinfo_desc()
+ */
+struct qdio_brinfo_entry_l3_ipv6 {
+       u64 nit;
+       struct { unsigned char _s6_addr[16]; } addr;
+} __packed;
+struct qdio_brinfo_entry_l3_ipv4 {
+       u64 nit;
+       struct { uint32_t _s_addr; } addr;
+} __packed;
+struct qdio_brinfo_entry_l2 {
+       u64 nit;
+       struct { u8 mac[6]; u16 lnid; } addr_lnid;
+} __packed;
+
 #define QDIO_STATE_INACTIVE            0x00000002 /* after qdio_cleanup */
 #define QDIO_STATE_ESTABLISHED         0x00000004 /* after qdio_establish */
 #define QDIO_STATE_ACTIVE              0x00000008 /* after qdio_activate */
@@ -399,5 +427,10 @@ extern int qdio_get_next_buffers(struct ccw_device *, int, int *, int *);
 extern int qdio_shutdown(struct ccw_device *, int);
 extern int qdio_free(struct ccw_device *);
 extern int qdio_get_ssqd_desc(struct ccw_device *, struct qdio_ssqd_desc *);
+extern int qdio_pnso_brinfo(struct subchannel_id schid,
+               int cnc, u16 *response,
+               void (*cb)(void *priv, enum qdio_brinfo_entry_type type,
+                               void *entry),
+               void *priv);
 
 #endif /* __QDIO_H__ */
index 13299f9..d24b367 100644 (file)
@@ -55,6 +55,7 @@ int chsc_error_from_response(int response)
        case 0x0004:
                return -EOPNOTSUPP;
        case 0x000b:
+       case 0x0107:            /* "Channel busy" for the op 0x003d */
                return -EBUSY;
        case 0x0100:
        case 0x0102:
@@ -1234,3 +1235,35 @@ 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);
index 23d072e..7e53a9c 100644 (file)
@@ -61,7 +61,9 @@ struct css_chsc_char {
        u32 : 20;
        u32 scssc : 1;  /* bit 107 */
        u32 scsscf : 1; /* bit 108 */
-       u32 : 19;
+       u32:7;
+       u32 pnso:1; /* bit 116 */
+       u32:11;
 }__attribute__((packed));
 
 extern struct css_chsc_char css_chsc_characteristics;
@@ -188,6 +190,53 @@ struct chsc_scm_info {
 
 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
 
+struct chsc_brinfo_resume_token {
+       u64 t1;
+       u64 t2;
+} __packed;
+
+struct chsc_brinfo_naihdr {
+       struct chsc_brinfo_resume_token resume_token;
+       u32:32;
+       u32 instance;
+       u32:24;
+       u8 naids;
+       u32 reserved[3];
+} __packed;
+
+struct chsc_pnso_area {
+       struct chsc_header request;
+       u8:2;
+       u8 m:1;
+       u8:5;
+       u8:2;
+       u8 ssid:2;
+       u8 fmt:4;
+       u16 sch;
+       u8:8;
+       u8 cssid;
+       u16:16;
+       u8 oc;
+       u32:24;
+       struct chsc_brinfo_resume_token resume_token;
+       u32 n:1;
+       u32:31;
+       u32 reserved[3];
+       struct chsc_header response;
+       u32:32;
+       struct chsc_brinfo_naihdr naihdr;
+       union {
+               struct qdio_brinfo_entry_l3_ipv6 l3_ipv6[0];
+               struct qdio_brinfo_entry_l3_ipv4 l3_ipv4[0];
+               struct qdio_brinfo_entry_l2      l2[0];
+       } entries;
+} __packed;
+
+int chsc_pnso_brinfo(struct subchannel_id schid,
+               struct chsc_pnso_area *brinfo_area,
+               struct chsc_brinfo_resume_token resume_token,
+               int cnc);
+
 #ifdef CONFIG_SCM_BUS
 int scm_update_information(void);
 int scm_process_availability_information(void);
index 3e602e8..5f99af4 100644 (file)
@@ -1752,6 +1752,97 @@ int qdio_stop_irq(struct ccw_device *cdev, int nr)
 }
 EXPORT_SYMBOL(qdio_stop_irq);
 
+/**
+ * qdio_pnso_brinfo() - perform network subchannel op #0 - bridge info.
+ * @schid:             Subchannel ID.
+ * @cnc:               Boolean Change-Notification Control
+ * @response:          Response code will be stored at this address
+ * @cb:                        Callback function will be executed for each element
+ *                     of the address list
+ * @priv:              Pointer passed from the caller to qdio_pnso_brinfo()
+ * @type:              Type of the address entry passed to the callback
+ * @entry:             Entry containg the address of the specified type
+ * @priv:              Pointer to pass to the callback function.
+ *
+ * Performs "Store-network-bridging-information list" operation and calls
+ * the callback function for every entry in the list. If "change-
+ * notification-control" is set, further changes in the address list
+ * will be reported via the IPA command.
+ */
+int qdio_pnso_brinfo(struct subchannel_id schid,
+               int cnc, u16 *response,
+               void (*cb)(void *priv, enum qdio_brinfo_entry_type type,
+                               void *entry),
+               void *priv)
+{
+       struct chsc_pnso_area *rr;
+       int rc;
+       u32 prev_instance = 0;
+       int isfirstblock = 1;
+       int i, size, elems;
+
+       rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
+       if (rr == NULL)
+               return -ENOMEM;
+       do {
+               /* on the first iteration, naihdr.resume_token will be zero */
+               rc = chsc_pnso_brinfo(schid, rr, rr->naihdr.resume_token, cnc);
+               if (rc != 0 && rc != -EBUSY)
+                       goto out;
+               if (rr->response.code != 1) {
+                       rc = -EIO;
+                       continue;
+               } else
+                       rc = 0;
+
+               if (cb == NULL)
+                       continue;
+
+               size = rr->naihdr.naids;
+               elems = (rr->response.length -
+                               sizeof(struct chsc_header) -
+                               sizeof(struct chsc_brinfo_naihdr)) /
+                               size;
+
+               if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
+                       /* Inform the caller that they need to scrap */
+                       /* the data that was already reported via cb */
+                               rc = -EAGAIN;
+                               break;
+               }
+               isfirstblock = 0;
+               prev_instance = rr->naihdr.instance;
+               for (i = 0; i < elems; i++)
+                       switch (size) {
+                       case sizeof(struct qdio_brinfo_entry_l3_ipv6):
+                               (*cb)(priv, l3_ipv6_addr,
+                                               &rr->entries.l3_ipv6[i]);
+                               break;
+                       case sizeof(struct qdio_brinfo_entry_l3_ipv4):
+                               (*cb)(priv, l3_ipv4_addr,
+                                               &rr->entries.l3_ipv4[i]);
+                               break;
+                       case sizeof(struct qdio_brinfo_entry_l2):
+                               (*cb)(priv, l2_addr_lnid,
+                                               &rr->entries.l2[i]);
+                               break;
+                       default:
+                               WARN_ON_ONCE(1);
+                               rc = -EIO;
+                               goto out;
+                       }
+       } while (rr->response.code == 0x0107 ||  /* channel busy */
+                 (rr->response.code == 1 && /* list stored */
+                  /* resume token is non-zero => list incomplete */
+                  (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
+       (*response) = rr->response.code;
+
+out:
+       free_page((unsigned long)rr);
+       return rc;
+}
+EXPORT_SYMBOL_GPL(qdio_pnso_brinfo);
+
 static int __init init_QDIO(void)
 {
        int rc;