mirror of
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df5e198723
before adding/removing packets from the queue. Also, the if_obytes and if_omcasts fields should only be manipulated under protection of the mutex. IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on the queue. An IF_LOCK macro is provided, as well as the old (mutex-less) versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which needs them, but their use is discouraged. Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF, which takes care of locking/enqueue, and also statistics updating/start if necessary.
881 lines
17 KiB
C
881 lines
17 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $FreeBSD$
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*
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*/
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/*
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* Core ATM Services
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* -----------------
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*
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* ATM device support functions
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/syslog.h>
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#include <net/if.h>
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#include <netatm/port.h>
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#include <netatm/queue.h>
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#include <netatm/atm.h>
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#include <netatm/atm_sys.h>
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#include <netatm/atm_sap.h>
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#include <netatm/atm_cm.h>
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#include <netatm/atm_if.h>
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#include <netatm/atm_vc.h>
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#include <netatm/atm_stack.h>
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#include <netatm/atm_pcb.h>
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#include <netatm/atm_var.h>
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#ifndef lint
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__RCSID("@(#) $FreeBSD$");
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#endif
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/*
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* Private structures for managing allocated kernel memory resources
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*
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* For each allocation of kernel memory, one Mem_ent will be used.
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* The Mem_ent structures will be allocated in blocks inside of a
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* Mem_blk structure.
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*/
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#define MEM_NMEMENT 10 /* How many Mem_ent's in a Mem_blk */
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struct mem_ent {
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void *me_kaddr; /* Allocated memory address */
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u_int me_ksize; /* Allocated memory length */
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void *me_uaddr; /* Memory address returned to caller */
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u_int me_flags; /* Flags (see below) */
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};
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typedef struct mem_ent Mem_ent;
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/*
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* Memory entry flags
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*/
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#define MEF_NONCACHE 1 /* Memory is noncacheable */
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struct mem_blk {
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struct mem_blk *mb_next; /* Next block in chain */
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Mem_ent mb_mement[MEM_NMEMENT]; /* Allocated memory entries */
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};
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typedef struct mem_blk Mem_blk;
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static Mem_blk *atm_mem_head = NULL;
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static struct t_atm_cause atm_dev_cause = {
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T_ATM_ITU_CODING,
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T_ATM_LOC_USER,
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T_ATM_CAUSE_VPCI_VCI_ASSIGNMENT_FAILURE,
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{0, 0, 0, 0}
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};
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/*
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* ATM Device Stack Instantiation
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*
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* Called at splnet.
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*
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* Arguments
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* ssp pointer to array of stack definition pointers
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* for connection
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* ssp[0] points to upper layer's stack definition
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* ssp[1] points to this layer's stack definition
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* ssp[2] points to lower layer's stack definition
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* cvcp pointer to connection vcc for this stack
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*
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* Returns
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* 0 instantiation successful
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* err instantiation failed - reason indicated
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*
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*/
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int
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atm_dev_inst(ssp, cvcp)
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struct stack_defn **ssp;
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Atm_connvc *cvcp;
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{
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Cmn_unit *cup = (Cmn_unit *)cvcp->cvc_attr.nif->nif_pif;
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Cmn_vcc *cvp;
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int err;
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/*
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* Check to see if device has been initialized
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*/
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if ((cup->cu_flags & CUF_INITED) == 0)
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return ( EIO );
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/*
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* Validate lower SAP
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*/
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/*
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* Device driver is the lowest layer - no need to validate
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*/
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/*
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* Validate PVC vpi.vci
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*/
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if (cvcp->cvc_attr.called.addr.address_format == T_ATM_PVC_ADDR) {
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/*
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* Look through existing circuits - return error if found
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*/
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Atm_addr_pvc *pp;
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pp = (Atm_addr_pvc *)cvcp->cvc_attr.called.addr.address;
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if (atm_dev_vcc_find(cup, ATM_PVC_GET_VPI(pp),
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ATM_PVC_GET_VCI(pp), 0))
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return ( EADDRINUSE );
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}
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/*
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* Validate our SAP type
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*/
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switch ((*(ssp+1))->sd_sap) {
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case SAP_CPCS_AAL3_4:
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case SAP_CPCS_AAL5:
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case SAP_ATM:
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break;
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default:
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return (EINVAL);
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}
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/*
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* Allocate a VCC control block
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*/
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if ( ( cvp = (Cmn_vcc *)atm_allocate(cup->cu_vcc_pool) ) == NULL )
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return ( ENOMEM );
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cvp->cv_state = CVS_INST;
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cvp->cv_toku = (*ssp)->sd_toku;
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cvp->cv_upper = (*ssp)->sd_upper;
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cvp->cv_connvc = cvcp;
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/*
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* Let device have a look at the connection request
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*/
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err = (*cup->cu_instvcc)(cup, cvp);
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if (err) {
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atm_free((caddr_t)cvp);
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return (err);
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}
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/*
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* Looks good so far, so link in device VCC
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*/
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LINK2TAIL ( cvp, Cmn_vcc, cup->cu_vcc, cv_next );
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/*
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* Save my token
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*/
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(*++ssp)->sd_toku = cvp;
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/*
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* Pass instantiation down the stack
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*/
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/*
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* No need - we're the lowest point.
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*/
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/* err = (*(ssp + 1))->sd_inst(ssp, cvcp); */
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/*
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* Save the lower layer's interface info
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*/
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/*
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* No need - we're the lowest point
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*/
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/* cvp->cv_lower = (*++ssp)->sd_lower; */
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/* cvp->cv_tok1 = (*ssp)->sd_toku; */
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return (0);
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}
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/*
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* ATM Device Stack Command Handler
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*
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* Arguments
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* cmd stack command code
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* tok session token (Cmn_vcc)
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* arg1 command specific argument
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* arg2 command specific argument
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*
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* Returns
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* none
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*
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*/
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/*ARGSUSED*/
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void
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atm_dev_lower(cmd, tok, arg1, arg2)
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int cmd;
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void *tok;
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int arg1;
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int arg2;
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{
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Cmn_vcc *cvp = (Cmn_vcc *)tok;
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Atm_connvc *cvcp = cvp->cv_connvc;
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Cmn_unit *cup = (Cmn_unit *)cvcp->cvc_attr.nif->nif_pif;
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struct vccb *vcp;
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u_int state;
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int s;
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switch ( cmd ) {
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case CPCS_INIT:
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/*
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* Sanity check
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*/
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if ( cvp->cv_state != CVS_INST ) {
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log ( LOG_ERR,
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"atm_dev_lower: INIT: tok=%p, state=%d\n",
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tok, cvp->cv_state );
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break;
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}
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vcp = cvp->cv_connvc->cvc_vcc;
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/*
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* Validate SVC vpi.vci
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*/
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if ( vcp->vc_type & VCC_SVC ) {
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if (atm_dev_vcc_find(cup, vcp->vc_vpi, vcp->vc_vci,
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vcp->vc_type & (VCC_IN | VCC_OUT))
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!= cvp){
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log ( LOG_ERR,
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"atm_dev_lower: dup SVC (%d,%d) tok=%p\n",
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vcp->vc_vpi, vcp->vc_vci, tok );
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atm_cm_abort(cvp->cv_connvc, &atm_dev_cause);
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break;
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}
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}
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/*
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* Tell the device to open the VCC
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*/
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cvp->cv_state = CVS_INITED;
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s = splimp();
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if ((*cup->cu_openvcc)(cup, cvp)) {
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atm_cm_abort(cvp->cv_connvc, &atm_dev_cause);
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(void) splx(s);
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break;
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}
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(void) splx(s);
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break;
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case CPCS_TERM: {
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KBuffer *m, *prev, *next;
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int *ip;
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s = splimp();
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/*
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* Disconnect the VCC - ignore return code
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*/
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if ((cvp->cv_state == CVS_INITED) ||
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(cvp->cv_state == CVS_ACTIVE)) {
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(void) (*cup->cu_closevcc)(cup, cvp);
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}
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cvp->cv_state = CVS_TERM;
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/*
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* Remove from interface list
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*/
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UNLINK ( cvp, Cmn_vcc, cup->cu_vcc, cv_next );
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/*
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* Free any buffers from this VCC on the ATM interrupt queue
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*/
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prev = NULL;
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IF_LOCK(&atm_intrq);
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for (m = atm_intrq.ifq_head; m; m = next) {
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next = KB_QNEXT(m);
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/*
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* See if this entry is for the terminating VCC
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*/
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KB_DATASTART(m, ip, int *);
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ip++;
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if (*ip == (int)cvp) {
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/*
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* Yep, so dequeue the entry
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*/
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if (prev == NULL)
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atm_intrq.ifq_head = next;
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else
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KB_QNEXT(prev) = next;
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if (next == NULL)
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atm_intrq.ifq_tail = prev;
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atm_intrq.ifq_len--;
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/*
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* Free the unwanted buffers
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*/
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KB_FREEALL(m);
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} else {
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prev = m;
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}
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}
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IF_UNLOCK(&atm_intrq);
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(void) splx(s);
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/*
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* Free VCC resources
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*/
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(void) atm_free((caddr_t)cvp);
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break;
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}
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case CPCS_UNITDATA_INV:
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/*
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* Sanity check
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*
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* Use temp state variable since we dont want to lock out
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* interrupts, but initial VC activation interrupt may
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* happen here, changing state somewhere in the middle.
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*/
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state = cvp->cv_state;
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if ((state != CVS_ACTIVE) &&
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(state != CVS_INITED)) {
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log ( LOG_ERR,
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"atm_dev_lower: UNITDATA: tok=%p, state=%d\n",
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tok, state );
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KB_FREEALL((KBuffer *)arg1);
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break;
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}
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/*
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* Hand the data off to the device
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*/
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(*cup->cu_output)(cup, cvp, (KBuffer *)arg1);
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break;
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case CPCS_UABORT_INV:
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log ( LOG_ERR,
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"atm_dev_lower: unimplemented stack cmd 0x%x, tok=%p\n",
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cmd, tok );
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break;
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default:
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log ( LOG_ERR,
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"atm_dev_lower: unknown stack cmd 0x%x, tok=%p\n",
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cmd, tok );
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}
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return;
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}
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/*
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* Allocate kernel memory block
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*
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* This function will allocate a kernel memory block of the type specified
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* in the flags parameter. The returned address will point to a memory
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* block of the requested size and alignment. The memory block will also
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* be zeroed. The alloc/free functions will manage/mask both the OS-specific
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* kernel memory management requirements and the bookkeeping required to
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* deal with data alignment issues.
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*
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* This function should not be called from interrupt level.
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*
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* Arguments:
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* size size of memory block to allocate
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* align data alignment requirement
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* flags allocation flags (ATM_DEV_*)
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*
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* Returns:
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* uaddr pointer to aligned memory block
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* NULL unable to allocate memory
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*
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*/
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void *
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atm_dev_alloc(size, align, flags)
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u_int size;
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u_int align;
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u_int flags;
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{
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Mem_blk *mbp;
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Mem_ent *mep;
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u_int kalign, ksize;
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int s, i;
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s = splimp();
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/*
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* Find a free Mem_ent
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*/
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mep = NULL;
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for (mbp = atm_mem_head; mbp && mep == NULL; mbp = mbp->mb_next) {
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for (i = 0; i < MEM_NMEMENT; i++) {
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if (mbp->mb_mement[i].me_uaddr == NULL) {
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mep = &mbp->mb_mement[i];
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break;
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}
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}
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}
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/*
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* If there are no free Mem_ent's, then allocate a new Mem_blk
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* and link it into the chain
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*/
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if (mep == NULL) {
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mbp = (Mem_blk *) KM_ALLOC(sizeof(Mem_blk), M_DEVBUF, M_NOWAIT);
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if (mbp == NULL) {
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log(LOG_ERR, "atm_dev_alloc: Mem_blk failure\n");
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(void) splx(s);
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return (NULL);
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}
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KM_ZERO(mbp, sizeof(Mem_blk));
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mbp->mb_next = atm_mem_head;
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atm_mem_head = mbp;
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mep = mbp->mb_mement;
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}
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/*
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* Now we need to get the kernel's allocation alignment minimum
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*
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* This is obviously very OS-specific stuff
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*/
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kalign = MINALLOCSIZE;
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/*
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* Figure out how much memory we must allocate to satify the
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* user's size and alignment needs
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*/
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if (align <= kalign)
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ksize = size;
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else
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ksize = size + align - kalign;
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/*
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* Finally, go get the memory
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*/
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if (flags & ATM_DEV_NONCACHE) {
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mep->me_kaddr = KM_ALLOC(ksize, M_DEVBUF, M_NOWAIT);
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} else {
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mep->me_kaddr = KM_ALLOC(ksize, M_DEVBUF, M_NOWAIT);
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}
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if (mep->me_kaddr == NULL) {
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log(LOG_ERR, "atm_dev_alloc: %skernel memory unavailable\n",
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(flags & ATM_DEV_NONCACHE) ? "non-cacheable " : "");
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(void) splx(s);
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return (NULL);
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}
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/*
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* Calculate correct alignment address to pass back to user
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*/
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mep->me_uaddr = (void *) roundup((u_int)mep->me_kaddr, align);
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mep->me_ksize = ksize;
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mep->me_flags = flags;
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/*
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* Clear memory for user
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*/
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KM_ZERO(mep->me_uaddr, size);
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ATM_DEBUG4("atm_dev_alloc: size=%d, align=%d, flags=%d, uaddr=%p\n",
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size, align, flags, mep->me_uaddr);
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(void) splx(s);
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return (mep->me_uaddr);
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}
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/*
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* Free kernel memory block
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*
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* This function will free a kernel memory block previously allocated by
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* the atm_dev_alloc function.
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*
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* This function should not be called from interrupt level.
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*
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* Arguments:
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* uaddr pointer to allocated aligned memory block
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*
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* Returns:
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* none
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*
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*/
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void
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atm_dev_free(uaddr)
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void *uaddr;
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{
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Mem_blk *mbp;
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Mem_ent *mep;
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int s, i;
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ATM_DEBUG1("atm_dev_free: uaddr=%p\n", uaddr);
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s = splimp();
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/*
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* Protect ourselves...
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*/
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if (uaddr == NULL)
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panic("atm_dev_free: trying to free null address");
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/*
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* Find our associated entry
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*/
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mep = NULL;
|
|
for (mbp = atm_mem_head; mbp && mep == NULL; mbp = mbp->mb_next) {
|
|
for (i = 0; i < MEM_NMEMENT; i++) {
|
|
if (mbp->mb_mement[i].me_uaddr == uaddr) {
|
|
mep = &mbp->mb_mement[i];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we didn't find our entry, then unceremoniously let the caller
|
|
* know they screwed up (it certainly couldn't be a bug here...)
|
|
*/
|
|
if (mep == NULL)
|
|
panic("atm_dev_free: trying to free unknown address");
|
|
|
|
/*
|
|
* Give the memory space back to the kernel
|
|
*/
|
|
if (mep->me_flags & ATM_DEV_NONCACHE) {
|
|
KM_FREE(mep->me_kaddr, mep->me_ksize, M_DEVBUF);
|
|
} else {
|
|
KM_FREE(mep->me_kaddr, mep->me_ksize, M_DEVBUF);
|
|
}
|
|
|
|
/*
|
|
* Free our entry
|
|
*/
|
|
mep->me_uaddr = NULL;
|
|
|
|
(void) splx(s);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
#ifdef sun4m
|
|
|
|
typedef int (*func_t)();
|
|
|
|
/*
|
|
* Map an address into DVMA space
|
|
*
|
|
* This function will take a kernel virtual address and map it to
|
|
* a DMA virtual address which can be used during SBus DMA cycles.
|
|
*
|
|
* Arguments:
|
|
* addr kernel virtual address
|
|
* len length of DVMA space requested
|
|
* flags allocation flags (ATM_DEV_*)
|
|
*
|
|
* Returns:
|
|
* a DVMA address
|
|
* NULL unable to map into DMA space
|
|
*
|
|
*/
|
|
void *
|
|
atm_dma_map(addr, len, flags)
|
|
caddr_t addr;
|
|
int len;
|
|
int flags;
|
|
{
|
|
if (flags & ATM_DEV_NONCACHE)
|
|
/*
|
|
* Non-cacheable memory is already DMA'able
|
|
*/
|
|
return ((void *)addr);
|
|
else
|
|
return ((void *)mb_nbmapalloc(bigsbusmap, addr, len,
|
|
MDR_BIGSBUS|MB_CANTWAIT, (func_t)NULL, (caddr_t)NULL));
|
|
}
|
|
|
|
|
|
/*
|
|
* Free a DVMA map address
|
|
*
|
|
* This function will free DVMA map resources (addresses) previously
|
|
* allocated with atm_dma_map().
|
|
*
|
|
* Arguments:
|
|
* addr DMA virtual address
|
|
* flags allocation flags (ATM_DEV_*)
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
atm_dma_free(addr, flags)
|
|
caddr_t addr;
|
|
int flags;
|
|
{
|
|
if ((flags & ATM_DEV_NONCACHE) == 0)
|
|
mb_mapfree(bigsbusmap, (int)&addr);
|
|
|
|
return;
|
|
}
|
|
#endif /* sun4m */
|
|
|
|
|
|
/*
|
|
* Compress buffer chain
|
|
*
|
|
* This function will compress a supplied buffer chain into a minimum number
|
|
* of kernel buffers. Typically, this function will be used because the
|
|
* number of buffers in an output buffer chain is too large for a device's
|
|
* DMA capabilities. This should only be called as a last resort, since
|
|
* all the data copying will surely kill any hopes of decent performance.
|
|
*
|
|
* Arguments:
|
|
* m pointer to source buffer chain
|
|
*
|
|
* Returns:
|
|
* n pointer to compressed buffer chain
|
|
*
|
|
*/
|
|
KBuffer *
|
|
atm_dev_compress(m)
|
|
KBuffer *m;
|
|
{
|
|
KBuffer *n, *n0, **np;
|
|
int len, space;
|
|
caddr_t src, dst;
|
|
|
|
n = n0 = NULL;
|
|
np = &n0;
|
|
dst = NULL;
|
|
space = 0;
|
|
|
|
/*
|
|
* Copy each source buffer into compressed chain
|
|
*/
|
|
while (m) {
|
|
|
|
if (space == 0) {
|
|
|
|
/*
|
|
* Allocate another buffer for compressed chain
|
|
*/
|
|
KB_ALLOCEXT(n, ATM_DEV_CMPR_LG, KB_F_NOWAIT, KB_T_DATA);
|
|
if (n) {
|
|
space = ATM_DEV_CMPR_LG;
|
|
} else {
|
|
KB_ALLOC(n, ATM_DEV_CMPR_SM, KB_F_NOWAIT,
|
|
KB_T_DATA);
|
|
if (n) {
|
|
space = ATM_DEV_CMPR_SM;
|
|
} else {
|
|
/*
|
|
* Unable to get any new buffers, so
|
|
* just return the partially compressed
|
|
* chain and hope...
|
|
*/
|
|
*np = m;
|
|
break;
|
|
}
|
|
}
|
|
|
|
KB_HEADSET(n, 0);
|
|
KB_LEN(n) = 0;
|
|
KB_BFRSTART(n, dst, caddr_t);
|
|
|
|
*np = n;
|
|
np = &KB_NEXT(n);
|
|
}
|
|
|
|
/*
|
|
* Copy what we can from source buffer
|
|
*/
|
|
len = MIN(space, KB_LEN(m));
|
|
KB_DATASTART(m, src, caddr_t);
|
|
KM_COPY(src, dst, len);
|
|
|
|
/*
|
|
* Adjust for copied data
|
|
*/
|
|
dst += len;
|
|
space -= len;
|
|
|
|
KB_HEADADJ(m, -len);
|
|
KB_TAILADJ(n, len);
|
|
|
|
/*
|
|
* If we've exhausted our current source buffer, free it
|
|
* and move to the next one
|
|
*/
|
|
if (KB_LEN(m) == 0) {
|
|
KB_FREEONE(m, m);
|
|
}
|
|
}
|
|
|
|
return (n0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Locate VCC entry
|
|
*
|
|
* This function will return the VCC entry for a specified interface and
|
|
* VPI/VCI value.
|
|
*
|
|
* Arguments:
|
|
* cup pointer to interface unit structure
|
|
* vpi VPI value
|
|
* vci VCI value
|
|
* type VCC type
|
|
*
|
|
* Returns:
|
|
* vcp pointer to located VCC entry matching
|
|
* NULL no VCC found
|
|
*
|
|
*/
|
|
Cmn_vcc *
|
|
atm_dev_vcc_find(cup, vpi, vci, type)
|
|
Cmn_unit *cup;
|
|
u_int vpi;
|
|
u_int vci;
|
|
u_int type;
|
|
{
|
|
Cmn_vcc *cvp;
|
|
int s = splnet();
|
|
|
|
/*
|
|
* Go find VCC
|
|
*
|
|
* (Probably should stick in a hash table some time)
|
|
*/
|
|
for (cvp = cup->cu_vcc; cvp; cvp = cvp->cv_next) {
|
|
struct vccb *vcp;
|
|
|
|
vcp = cvp->cv_connvc->cvc_vcc;
|
|
if ((vcp->vc_vci == vci) && (vcp->vc_vpi == vpi) &&
|
|
((vcp->vc_type & type) == type))
|
|
break;
|
|
}
|
|
|
|
(void) splx(s);
|
|
return (cvp);
|
|
}
|
|
|
|
|
|
#ifdef notdef
|
|
/*
|
|
* Module unloading notification
|
|
*
|
|
* This function must be called just prior to unloading the module from
|
|
* memory. All allocated memory will be freed here and anything else that
|
|
* needs cleaning up.
|
|
*
|
|
* Arguments:
|
|
* none
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
atm_unload()
|
|
{
|
|
Mem_blk *mbp;
|
|
Mem_ent *mep;
|
|
int s, i;
|
|
|
|
s = splimp();
|
|
|
|
/*
|
|
* Free up all of our memory management storage
|
|
*/
|
|
while (mbp = atm_mem_head) {
|
|
|
|
/*
|
|
* Make sure users have freed up all of their memory
|
|
*/
|
|
for (i = 0; i < MEM_NMEMENT; i++) {
|
|
if (mbp->mb_mement[i].me_uaddr != NULL) {
|
|
panic("atm_unload: unfreed memory");
|
|
}
|
|
}
|
|
|
|
atm_mem_head = mbp->mb_next;
|
|
|
|
/*
|
|
* Hand this block back to the kernel
|
|
*/
|
|
KM_FREE((caddr_t) mbp, sizeof(Mem_blk), M_DEVBUF);
|
|
}
|
|
|
|
(void) splx(s);
|
|
|
|
return;
|
|
}
|
|
#endif /* notdef */
|
|
|
|
|
|
/*
|
|
* Print a PDU
|
|
*
|
|
* Arguments:
|
|
* cup pointer to device unit
|
|
* cvp pointer to VCC control block
|
|
* m pointer to pdu buffer chain
|
|
* msg pointer to message string
|
|
*
|
|
* Returns:
|
|
* none
|
|
*
|
|
*/
|
|
void
|
|
atm_dev_pdu_print(cup, cvp, m, msg)
|
|
Cmn_unit *cup;
|
|
Cmn_vcc *cvp;
|
|
KBuffer *m;
|
|
char *msg;
|
|
{
|
|
char buf[128];
|
|
|
|
snprintf(buf, sizeof(buf), "%s vcc=(%d,%d)", msg,
|
|
cvp->cv_connvc->cvc_vcc->vc_vpi,
|
|
cvp->cv_connvc->cvc_vcc->vc_vci);
|
|
|
|
atm_pdu_print(m, buf);
|
|
}
|
|
|