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s390/qdio: bridgeport support - CHSC part 

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>
This commit is contained in:
Eugene Crosser 2014-01-14 15:54:12 +01:00 committed by David S. Miller
parent b4d72c08b3
commit 59b55a4df2
5 changed files with 209 additions and 1 deletions
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2
arch/s390/include/asm/css_chars.h
View 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;

33
arch/s390/include/asm/qdio.h
View 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__ */

33
drivers/s390/cio/chsc.c
View 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);

51
drivers/s390/cio/chsc.h
View 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);

91
drivers/s390/cio/qdio_main.c
View 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;