1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
30*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
31*0Sstevel@tonic-gate /* All Rights Reserved */
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate /*
34*0Sstevel@tonic-gate * This is the implementation of the kernel DMA interface for the
35*0Sstevel@tonic-gate * AT Class machines using Intel 8237A DMAC.
36*0Sstevel@tonic-gate *
37*0Sstevel@tonic-gate * The following routines in the interface are implemented:
38*0Sstevel@tonic-gate * i_dmae_init()
39*0Sstevel@tonic-gate * _dmae_nxcookie()
40*0Sstevel@tonic-gate * i_dmae_acquire()
41*0Sstevel@tonic-gate * i_dmae_free()
42*0Sstevel@tonic-gate * i_dmae_prog()
43*0Sstevel@tonic-gate * i_dmae_swsetup()
44*0Sstevel@tonic-gate * i_dmae_swstart()
45*0Sstevel@tonic-gate * i_dmae_stop()
46*0Sstevel@tonic-gate * i_dmae_enable()
47*0Sstevel@tonic-gate * i_dmae_disable()
48*0Sstevel@tonic-gate * i_dmae_get_best_mode()
49*0Sstevel@tonic-gate * i_dmae_get_chan_stat()
50*0Sstevel@tonic-gate *
51*0Sstevel@tonic-gate */
52*0Sstevel@tonic-gate
53*0Sstevel@tonic-gate #include <sys/types.h>
54*0Sstevel@tonic-gate #include <sys/param.h>
55*0Sstevel@tonic-gate #include <sys/buf.h>
56*0Sstevel@tonic-gate #include <sys/kmem.h>
57*0Sstevel@tonic-gate #include <sys/sunddi.h>
58*0Sstevel@tonic-gate #include <sys/cmn_err.h>
59*0Sstevel@tonic-gate #include <sys/dma_engine.h>
60*0Sstevel@tonic-gate #include <sys/dma_i8237A.h>
61*0Sstevel@tonic-gate
62*0Sstevel@tonic-gate #ifdef DEBUG
63*0Sstevel@tonic-gate #include <sys/promif.h>
64*0Sstevel@tonic-gate static int dmaedebug = 0;
65*0Sstevel@tonic-gate #define dprintf(x) if (dmaedebug) prom_printf x
66*0Sstevel@tonic-gate #else
67*0Sstevel@tonic-gate #define dprintf(x)
68*0Sstevel@tonic-gate #endif
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate static struct dmae_chnl dmae_stat[NCHANS];
72*0Sstevel@tonic-gate static uintptr_t dmae_call_list[NCHANS] = {0, 0, 0, 0, 0, 0, 0, 0};
73*0Sstevel@tonic-gate
74*0Sstevel@tonic-gate /*
75*0Sstevel@tonic-gate * routine: i_dmae_init()
76*0Sstevel@tonic-gate * purpose: called to initialize the dma interface, the DMAC, and any
77*0Sstevel@tonic-gate * dma data structures. Called during system initialization.
78*0Sstevel@tonic-gate * caller: main()
79*0Sstevel@tonic-gate * calls: d37A_init()
80*0Sstevel@tonic-gate */
81*0Sstevel@tonic-gate
82*0Sstevel@tonic-gate int
i_dmae_init(dev_info_t * dip)83*0Sstevel@tonic-gate i_dmae_init(dev_info_t *dip)
84*0Sstevel@tonic-gate {
85*0Sstevel@tonic-gate int chnl;
86*0Sstevel@tonic-gate
87*0Sstevel@tonic-gate dprintf(("i_dmae_init: initializing dma.\n"));
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate /* initialize semaphore map */
90*0Sstevel@tonic-gate for (chnl = 0; chnl < NCHANS; chnl++) {
91*0Sstevel@tonic-gate sema_init(&dmae_stat[chnl].dch_lock, 1, NULL, SEMA_DRIVER,
92*0Sstevel@tonic-gate (void *)NULL);
93*0Sstevel@tonic-gate }
94*0Sstevel@tonic-gate return (d37A_init(dip));
95*0Sstevel@tonic-gate }
96*0Sstevel@tonic-gate
97*0Sstevel@tonic-gate
98*0Sstevel@tonic-gate /*
99*0Sstevel@tonic-gate * routine: i_dmae_acquire()
100*0Sstevel@tonic-gate * purpose: Request the semaphore for the indicated channel.
101*0Sstevel@tonic-gate * A call_back function can be passed if caller does/cannot
102*0Sstevel@tonic-gate * wait for the semaphore.
103*0Sstevel@tonic-gate * caller: drivers
104*0Sstevel@tonic-gate * calls: sema_p(), sema_tryp(), ddi_set_callback()
105*0Sstevel@tonic-gate */
106*0Sstevel@tonic-gate int
i_dmae_acquire(dev_info_t * dip,int chnl,int (* dmae_waitfp)(),caddr_t arg)107*0Sstevel@tonic-gate i_dmae_acquire(dev_info_t *dip, int chnl, int (*dmae_waitfp)(), caddr_t arg)
108*0Sstevel@tonic-gate {
109*0Sstevel@tonic-gate #if defined(lint)
110*0Sstevel@tonic-gate dip = dip;
111*0Sstevel@tonic-gate #endif
112*0Sstevel@tonic-gate dprintf(("i_dmae_acquire: channel %d, waitfp %p\n",
113*0Sstevel@tonic-gate chnl, (void *)dmae_waitfp));
114*0Sstevel@tonic-gate
115*0Sstevel@tonic-gate if (!d37A_dma_valid(chnl))
116*0Sstevel@tonic-gate return (DDI_FAILURE);
117*0Sstevel@tonic-gate
118*0Sstevel@tonic-gate if (dmae_waitfp == DDI_DMA_SLEEP) {
119*0Sstevel@tonic-gate sema_p(&dmae_stat[chnl].dch_lock);
120*0Sstevel@tonic-gate } else if (sema_tryp(&dmae_stat[chnl].dch_lock) == 0) {
121*0Sstevel@tonic-gate if (dmae_waitfp == DDI_DMA_DONTWAIT) {
122*0Sstevel@tonic-gate dprintf(("_dma_acquire: channel %d is busy.\n", chnl));
123*0Sstevel@tonic-gate } else {
124*0Sstevel@tonic-gate ddi_set_callback(dmae_waitfp, arg,
125*0Sstevel@tonic-gate &dmae_call_list[chnl]);
126*0Sstevel@tonic-gate }
127*0Sstevel@tonic-gate return (DDI_DMA_NORESOURCES);
128*0Sstevel@tonic-gate }
129*0Sstevel@tonic-gate
130*0Sstevel@tonic-gate /*
131*0Sstevel@tonic-gate * XXX - save dip for authentication later ??
132*0Sstevel@tonic-gate */
133*0Sstevel@tonic-gate dprintf(("_dma_acquire: channel %d now allocated.\n", chnl));
134*0Sstevel@tonic-gate return (DDI_SUCCESS);
135*0Sstevel@tonic-gate }
136*0Sstevel@tonic-gate
137*0Sstevel@tonic-gate
138*0Sstevel@tonic-gate /*
139*0Sstevel@tonic-gate * routine: i_dmae_free()
140*0Sstevel@tonic-gate * purpose: Release the channel semaphore on chnl. Assumes caller actually
141*0Sstevel@tonic-gate * owns the semaphore (no check made for this).
142*0Sstevel@tonic-gate * caller: drivers
143*0Sstevel@tonic-gate * calls: none
144*0Sstevel@tonic-gate */
145*0Sstevel@tonic-gate
146*0Sstevel@tonic-gate int
i_dmae_free(dev_info_t * dip,int chnl)147*0Sstevel@tonic-gate i_dmae_free(dev_info_t *dip, int chnl)
148*0Sstevel@tonic-gate {
149*0Sstevel@tonic-gate #if defined(lint)
150*0Sstevel@tonic-gate dip = dip;
151*0Sstevel@tonic-gate #endif
152*0Sstevel@tonic-gate dprintf(("i_dmae_free: channel %d\n", chnl));
153*0Sstevel@tonic-gate
154*0Sstevel@tonic-gate d37A_dma_release(chnl);
155*0Sstevel@tonic-gate /*
156*0Sstevel@tonic-gate * XXX - should dip be authenticated as the one that did acquire?
157*0Sstevel@tonic-gate */
158*0Sstevel@tonic-gate sema_v(&dmae_stat[chnl].dch_lock);
159*0Sstevel@tonic-gate
160*0Sstevel@tonic-gate if (dmae_call_list[chnl])
161*0Sstevel@tonic-gate ddi_run_callback(&dmae_call_list[chnl]);
162*0Sstevel@tonic-gate return (DDI_SUCCESS);
163*0Sstevel@tonic-gate }
164*0Sstevel@tonic-gate
165*0Sstevel@tonic-gate /*
166*0Sstevel@tonic-gate * routine: i_dmae_get_best_mode()
167*0Sstevel@tonic-gate * purpose: confirm that data is aligned for efficient flyby mode
168*0Sstevel@tonic-gate * caller: driver routines.
169*0Sstevel@tonic-gate * calls: d37A_get_best_mode.
170*0Sstevel@tonic-gate */
171*0Sstevel@tonic-gate
172*0Sstevel@tonic-gate uchar_t
i_dmae_get_best_mode(dev_info_t * dip,struct ddi_dmae_req * dmaereqp)173*0Sstevel@tonic-gate i_dmae_get_best_mode(dev_info_t *dip, struct ddi_dmae_req *dmaereqp)
174*0Sstevel@tonic-gate {
175*0Sstevel@tonic-gate #if defined(lint)
176*0Sstevel@tonic-gate dip = dip;
177*0Sstevel@tonic-gate #endif
178*0Sstevel@tonic-gate return (d37A_get_best_mode(dmaereqp));
179*0Sstevel@tonic-gate }
180*0Sstevel@tonic-gate
181*0Sstevel@tonic-gate /*
182*0Sstevel@tonic-gate * routine: _dmae_nxcookie()
183*0Sstevel@tonic-gate * purpose: service the interrupt by calling device driver routine for next
184*0Sstevel@tonic-gate * DMA cookie.
185*0Sstevel@tonic-gate * caller: d37A_intr()
186*0Sstevel@tonic-gate * calls: routine provided in request structure
187*0Sstevel@tonic-gate */
188*0Sstevel@tonic-gate
189*0Sstevel@tonic-gate ddi_dma_cookie_t *
_dmae_nxcookie(int chnl)190*0Sstevel@tonic-gate _dmae_nxcookie(int chnl)
191*0Sstevel@tonic-gate {
192*0Sstevel@tonic-gate ddi_dma_cookie_t *cookiep = NULL;
193*0Sstevel@tonic-gate
194*0Sstevel@tonic-gate dprintf(("_dmae_nxcookie: chnl %d\n", chnl));
195*0Sstevel@tonic-gate
196*0Sstevel@tonic-gate if (dmae_stat[chnl].proc) {
197*0Sstevel@tonic-gate
198*0Sstevel@tonic-gate cookiep = dmae_stat[chnl].proc(dmae_stat[chnl].procparms);
199*0Sstevel@tonic-gate /*
200*0Sstevel@tonic-gate * expect a cookie pointer from user's routine;
201*0Sstevel@tonic-gate * null cookie pointer will terminate chaining
202*0Sstevel@tonic-gate */
203*0Sstevel@tonic-gate }
204*0Sstevel@tonic-gate return (cookiep);
205*0Sstevel@tonic-gate }
206*0Sstevel@tonic-gate
207*0Sstevel@tonic-gate
208*0Sstevel@tonic-gate /*
209*0Sstevel@tonic-gate * routine: i_dmae_prog()
210*0Sstevel@tonic-gate * purpose: Program channel for the to_be_initiated_by_hardware operation.
211*0Sstevel@tonic-gate * _dma_acquire is called to request the channel semaphore and
212*0Sstevel@tonic-gate * mode is passed as the sleep parameter.
213*0Sstevel@tonic-gate * The channel is enabled after it is setup.
214*0Sstevel@tonic-gate * Note that the ddi_dmae_req pointer can be to NULL if the mode
215*0Sstevel@tonic-gate * registers have already been setup by a prior call; this implements
216*0Sstevel@tonic-gate * a prog_next() to update the address and count registers.
217*0Sstevel@tonic-gate * caller: driver routines
218*0Sstevel@tonic-gate * calls: d37A_prog_chan()
219*0Sstevel@tonic-gate */
220*0Sstevel@tonic-gate
221*0Sstevel@tonic-gate int
i_dmae_prog(dev_info_t * dip,struct ddi_dmae_req * dmaereqp,ddi_dma_cookie_t * cp,int chnl)222*0Sstevel@tonic-gate i_dmae_prog(dev_info_t *dip, struct ddi_dmae_req *dmaereqp,
223*0Sstevel@tonic-gate ddi_dma_cookie_t *cp, int chnl)
224*0Sstevel@tonic-gate {
225*0Sstevel@tonic-gate struct dmae_chnl *dcp;
226*0Sstevel@tonic-gate int rval;
227*0Sstevel@tonic-gate
228*0Sstevel@tonic-gate #if defined(lint)
229*0Sstevel@tonic-gate dip = dip;
230*0Sstevel@tonic-gate #endif
231*0Sstevel@tonic-gate rval = d37A_prog_chan(dmaereqp, cp, chnl);
232*0Sstevel@tonic-gate if (rval != DDI_SUCCESS) {
233*0Sstevel@tonic-gate dprintf(("i_dmae_prog: failure on channel %d dmaereq=%p\n",
234*0Sstevel@tonic-gate chnl, (void *)dmaereqp));
235*0Sstevel@tonic-gate } else {
236*0Sstevel@tonic-gate dprintf(("i_dmae_prog: channel %d dmaereq=%p\n",
237*0Sstevel@tonic-gate chnl, (void *)dmaereqp));
238*0Sstevel@tonic-gate dcp = &dmae_stat[chnl];
239*0Sstevel@tonic-gate dcp->dch_cookiep = cp;
240*0Sstevel@tonic-gate if (dmaereqp) {
241*0Sstevel@tonic-gate dcp->proc = dmaereqp->proc;
242*0Sstevel@tonic-gate dcp->procparms = dmaereqp->procparms;
243*0Sstevel@tonic-gate }
244*0Sstevel@tonic-gate d37A_dma_enable(chnl);
245*0Sstevel@tonic-gate }
246*0Sstevel@tonic-gate return (rval);
247*0Sstevel@tonic-gate }
248*0Sstevel@tonic-gate
249*0Sstevel@tonic-gate
250*0Sstevel@tonic-gate /*
251*0Sstevel@tonic-gate * routine: i_dmae_swsetup()
252*0Sstevel@tonic-gate * purpose: Setup chan for the operation given in dmacbptr.
253*0Sstevel@tonic-gate * _dma_acquire is first called
254*0Sstevel@tonic-gate * to request the channel semaphore for chnl; mode is
255*0Sstevel@tonic-gate * passed to _dma_acquire().
256*0Sstevel@tonic-gate * caller: driver routines
257*0Sstevel@tonic-gate * calls: d37A_dma_swsetup()
258*0Sstevel@tonic-gate */
259*0Sstevel@tonic-gate
260*0Sstevel@tonic-gate int
i_dmae_swsetup(dev_info_t * dip,struct ddi_dmae_req * dmaereqp,ddi_dma_cookie_t * cp,int chnl)261*0Sstevel@tonic-gate i_dmae_swsetup(dev_info_t *dip, struct ddi_dmae_req *dmaereqp,
262*0Sstevel@tonic-gate ddi_dma_cookie_t *cp, int chnl)
263*0Sstevel@tonic-gate {
264*0Sstevel@tonic-gate struct dmae_chnl *dcp;
265*0Sstevel@tonic-gate int rval;
266*0Sstevel@tonic-gate
267*0Sstevel@tonic-gate #if defined(lint)
268*0Sstevel@tonic-gate dip = dip;
269*0Sstevel@tonic-gate #endif
270*0Sstevel@tonic-gate rval = d37A_dma_swsetup(dmaereqp, cp, chnl);
271*0Sstevel@tonic-gate if (rval != DDI_SUCCESS) {
272*0Sstevel@tonic-gate dprintf(("i_dmae_swsetup: failure on channel %d dmaereq=%p\n",
273*0Sstevel@tonic-gate chnl, (void *)dmaereqp));
274*0Sstevel@tonic-gate } else {
275*0Sstevel@tonic-gate dprintf(("i_dmae_swsetup: channel %d: dmaereq=%p\n",
276*0Sstevel@tonic-gate chnl, (void *)dmaereqp));
277*0Sstevel@tonic-gate dcp = &dmae_stat[chnl];
278*0Sstevel@tonic-gate dcp->dch_cookiep = cp;
279*0Sstevel@tonic-gate dcp->proc = dmaereqp->proc;
280*0Sstevel@tonic-gate dcp->procparms = dmaereqp->procparms;
281*0Sstevel@tonic-gate }
282*0Sstevel@tonic-gate return (rval);
283*0Sstevel@tonic-gate }
284*0Sstevel@tonic-gate
285*0Sstevel@tonic-gate
286*0Sstevel@tonic-gate /*
287*0Sstevel@tonic-gate * routine: i_dmae_swstart()
288*0Sstevel@tonic-gate * purpose: Start the operation setup by i_dmae_swsetup().
289*0Sstevel@tonic-gate * caller: driver routines
290*0Sstevel@tonic-gate * calls: d37A_dma_swstart().
291*0Sstevel@tonic-gate */
292*0Sstevel@tonic-gate
293*0Sstevel@tonic-gate void
i_dmae_swstart(dev_info_t * dip,int chnl)294*0Sstevel@tonic-gate i_dmae_swstart(dev_info_t *dip, int chnl)
295*0Sstevel@tonic-gate {
296*0Sstevel@tonic-gate #if defined(lint)
297*0Sstevel@tonic-gate dip = dip;
298*0Sstevel@tonic-gate #endif
299*0Sstevel@tonic-gate dprintf(("i_dmae_swstart: channel %d.\n", chnl));
300*0Sstevel@tonic-gate
301*0Sstevel@tonic-gate d37A_dma_swstart(chnl);
302*0Sstevel@tonic-gate }
303*0Sstevel@tonic-gate
304*0Sstevel@tonic-gate
305*0Sstevel@tonic-gate /*
306*0Sstevel@tonic-gate * routine: i_dmae_stop()
307*0Sstevel@tonic-gate * purpose: stop DMA activity on chnl.
308*0Sstevel@tonic-gate * caller: driver routines
309*0Sstevel@tonic-gate * calls: splhi(), _dma_relse(), splx(),
310*0Sstevel@tonic-gate * d37A_dma_stop().
311*0Sstevel@tonic-gate */
312*0Sstevel@tonic-gate
313*0Sstevel@tonic-gate void
i_dmae_stop(dev_info_t * dip,int chnl)314*0Sstevel@tonic-gate i_dmae_stop(dev_info_t *dip, int chnl)
315*0Sstevel@tonic-gate {
316*0Sstevel@tonic-gate #if defined(lint)
317*0Sstevel@tonic-gate dip = dip;
318*0Sstevel@tonic-gate #endif
319*0Sstevel@tonic-gate dprintf(("i_dmae_stop: channel %d\n", chnl));
320*0Sstevel@tonic-gate
321*0Sstevel@tonic-gate /* call d37A the stop the channel */
322*0Sstevel@tonic-gate d37A_dma_stop(chnl);
323*0Sstevel@tonic-gate
324*0Sstevel@tonic-gate dmae_stat[chnl].dch_cookiep = NULL;
325*0Sstevel@tonic-gate }
326*0Sstevel@tonic-gate
327*0Sstevel@tonic-gate
328*0Sstevel@tonic-gate /*
329*0Sstevel@tonic-gate * routine: i_dmae_enable()
330*0Sstevel@tonic-gate * purpose: Allow the hardware tied to channel chnl to request service
331*0Sstevel@tonic-gate * from the DMAC. i_dmae_prog() should have been called prior
332*0Sstevel@tonic-gate * to this.
333*0Sstevel@tonic-gate * caller: driver routines.
334*0Sstevel@tonic-gate * calls: d37A_dma_enable()
335*0Sstevel@tonic-gate */
336*0Sstevel@tonic-gate
337*0Sstevel@tonic-gate void
i_dmae_enable(dev_info_t * dip,int chnl)338*0Sstevel@tonic-gate i_dmae_enable(dev_info_t *dip, int chnl)
339*0Sstevel@tonic-gate {
340*0Sstevel@tonic-gate #if defined(lint)
341*0Sstevel@tonic-gate dip = dip;
342*0Sstevel@tonic-gate #endif
343*0Sstevel@tonic-gate dprintf(("i_dmae_enable: channel %d\n", chnl));
344*0Sstevel@tonic-gate
345*0Sstevel@tonic-gate d37A_dma_enable(chnl);
346*0Sstevel@tonic-gate }
347*0Sstevel@tonic-gate
348*0Sstevel@tonic-gate
349*0Sstevel@tonic-gate /*
350*0Sstevel@tonic-gate * routine: i_dmae_disable()
351*0Sstevel@tonic-gate * purpose: Called to mask off hardware requests on channel chnl. Assumes
352*0Sstevel@tonic-gate * the caller owns the channel.
353*0Sstevel@tonic-gate * caller: driver routines.
354*0Sstevel@tonic-gate * calls: d37A_dma_disable()
355*0Sstevel@tonic-gate */
356*0Sstevel@tonic-gate
357*0Sstevel@tonic-gate void
i_dmae_disable(dev_info_t * dip,int chnl)358*0Sstevel@tonic-gate i_dmae_disable(dev_info_t *dip, int chnl)
359*0Sstevel@tonic-gate {
360*0Sstevel@tonic-gate #if defined(lint)
361*0Sstevel@tonic-gate dip = dip;
362*0Sstevel@tonic-gate #endif
363*0Sstevel@tonic-gate /* dprintf(("i_dmae_disable: disable channel %d.\n", chnl)); */
364*0Sstevel@tonic-gate
365*0Sstevel@tonic-gate d37A_dma_disable(chnl);
366*0Sstevel@tonic-gate
367*0Sstevel@tonic-gate dmae_stat[chnl].dch_cookiep = NULL;
368*0Sstevel@tonic-gate }
369*0Sstevel@tonic-gate
370*0Sstevel@tonic-gate
371*0Sstevel@tonic-gate /*
372*0Sstevel@tonic-gate * routine: i_dmae_get_chan_stat()
373*0Sstevel@tonic-gate * purpose: Obtain the current channel status from the DMAC
374*0Sstevel@tonic-gate * caller: driver routines.
375*0Sstevel@tonic-gate * calls: d37A_get_chan_stat()
376*0Sstevel@tonic-gate */
377*0Sstevel@tonic-gate
378*0Sstevel@tonic-gate void
i_dmae_get_chan_stat(dev_info_t * dip,int chnl,ulong_t * addressp,int * countp)379*0Sstevel@tonic-gate i_dmae_get_chan_stat(dev_info_t *dip, int chnl, ulong_t *addressp, int *countp)
380*0Sstevel@tonic-gate {
381*0Sstevel@tonic-gate #if defined(lint)
382*0Sstevel@tonic-gate dip = dip;
383*0Sstevel@tonic-gate #endif
384*0Sstevel@tonic-gate dprintf(("i_dmae_get_chan_stat: channel %d", chnl));
385*0Sstevel@tonic-gate
386*0Sstevel@tonic-gate d37A_get_chan_stat(chnl, addressp, countp);
387*0Sstevel@tonic-gate }
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