s390/qdio: bridgeport support - CHSC part (59b55a4d) · Commits · EulixOS / Software / Kernel

arch/s390/include/asm/css_chars.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;

arch/s390/include/asm/qdio.h

+33 −0

Original line number	Diff line number	Diff line
		@@ -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__ */

drivers/s390/cio/chsc.c

+33 −0

Original line number	Diff line number	Diff line
		@@ -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 @@ int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token)
		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);

drivers/s390/cio/chsc.h

+50 −1

Original line number	Diff line number	Diff line
		@@ -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);

drivers/s390/cio/qdio_main.c

+91 −0

Original line number	Diff line number	Diff line
		@@ -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;