/* $NetBSD: vsbus.c,v 1.68.2.1 2024/02/19 08:58:58 martin Exp $ */ /* * Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden. * All rights reserved. * * This code is derived from software contributed to Ludd by Bertram Barth. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: vsbus.c,v 1.68.2.1 2024/02/19 08:58:58 martin Exp $"); #include "opt_cputype.h" #define _VAX_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ioconf.h" #include "locators.h" static int vsbus_match(device_t, cfdata_t, void *); static void vsbus_attach(device_t, device_t, void *); static int vsbus_print(void *, const char *); static int vsbus_search(device_t, cfdata_t, const int *, void *); static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; CFATTACH_DECL_NEW(vsbus, sizeof(struct vsbus_softc), vsbus_match, vsbus_attach, NULL, NULL); static struct vax_bus_dma_tag vsbus_bus_dma_tag = { ._dmamap_create = _bus_dmamap_create, ._dmamap_destroy = _bus_dmamap_destroy, ._dmamap_load = _bus_dmamap_load, ._dmamap_load_mbuf = _bus_dmamap_load_mbuf, ._dmamap_load_uio = _bus_dmamap_load_uio, ._dmamap_load_raw = _bus_dmamap_load_raw, ._dmamap_unload = _bus_dmamap_unload, ._dmamap_sync = _bus_dmamap_sync, ._dmamem_alloc = _bus_dmamem_alloc, ._dmamem_free = _bus_dmamem_free, ._dmamem_map = _bus_dmamem_map, ._dmamem_unmap = _bus_dmamem_unmap, ._dmamem_mmap = _bus_dmamem_mmap, }; int vsbus_print(void *aux, const char *name) { struct vsbus_attach_args * const va = aux; aprint_normal(" csr 0x%lx vec %o ipl %x maskbit %d", va->va_paddr, va->va_cvec & 511, va->va_br, va->va_maskno - 1); return UNCONF; } int vsbus_match(device_t parent, cfdata_t cf, void *aux) { struct mainbus_attach_args * const ma = aux; return !strcmp("vsbus", ma->ma_type); } void vsbus_attach(device_t parent, device_t self, void *aux) { struct mainbus_attach_args * const ma = aux; struct vsbus_softc *sc = device_private(self); int dbase, dsize; aprint_normal("\n"); sc->sc_dev = self; sc->sc_iot = ma->ma_iot; sc->sc_dmatag = vsbus_bus_dma_tag; switch (vax_boardtype) { #if VAX49 || VAX53 case VAX_BTYP_53: case VAX_BTYP_49: sc->sc_vsregs = vax_map_physmem(VS_REGS_KA49, 1); sc->sc_intreq = (char *)sc->sc_vsregs + 12; sc->sc_intclr = (char *)sc->sc_vsregs + 12; sc->sc_intmsk = (char *)sc->sc_vsregs + 8; vsbus_dma_init(sc, 8192); break; #endif #if VAX46 || VAX48 case VAX_BTYP_48: case VAX_BTYP_46: sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); sc->sc_intreq = (char *)sc->sc_vsregs + 15; sc->sc_intclr = (char *)sc->sc_vsregs + 15; sc->sc_intmsk = (char *)sc->sc_vsregs + 12; vsbus_dma_init(sc, 32768); break; #endif default: sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); sc->sc_intreq = (char *)sc->sc_vsregs + 15; sc->sc_intclr = (char *)sc->sc_vsregs + 15; sc->sc_intmsk = (char *)sc->sc_vsregs + 12; if (vax_boardtype == VAX_BTYP_410) { dbase = KA410_DMA_BASE; dsize = KA410_DMA_SIZE; } else { dbase = KA420_DMA_BASE; dsize = KA420_DMA_SIZE; } sc->sc_dmasize = dsize; sc->sc_dmaaddr = uvm_km_alloc(kernel_map, dsize, 0, UVM_KMF_VAONLY); ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); break; } SIMPLEQ_INIT(&vsbus_dma); /* * First: find which interrupts we won't care about. * There are interrupts that interrupt on a periodic basic * that we don't want to interfere with the rest of the * interrupt probing. */ *sc->sc_intmsk = 0; *sc->sc_intclr = 0xff; DELAY(1000000); /* Wait a second */ sc->sc_mask = *sc->sc_intreq; aprint_normal_dev(self, "interrupt mask %x\n", sc->sc_mask); /* * now check for all possible devices on this "bus" */ config_search(self, NULL, CFARGS(.search = vsbus_search)); /* Autoconfig finished, enable interrupts */ *sc->sc_intmsk = ~sc->sc_mask; } int vsbus_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) { struct vsbus_softc *sc = device_private(parent); struct vsbus_attach_args va; int i, vec, br; u_char c; va.va_paddr = cf->cf_loc[VSBUSCF_CSR]; va.va_addr = vax_map_physmem(va.va_paddr, 1); va.va_dmat = &sc->sc_dmatag; va.va_memt = sc->sc_iot; *sc->sc_intmsk = 0; *sc->sc_intclr = 0xff; scb_vecref(0, 0); /* Clear vector ref */ i = config_probe(parent, cf, &va); vax_unmap_physmem(va.va_addr, 1); c = *sc->sc_intreq & ~sc->sc_mask; if (i == 0) goto forgetit; if (i > 10) c = sc->sc_mask; /* Fooling interrupt */ else if (c == 0) goto forgetit; *sc->sc_intmsk = c; DELAY(100); *sc->sc_intmsk = 0; va.va_maskno = ffs((u_int)c); i = scb_vecref(&vec, &br); if (i == 0) goto fail; if (vec == 0) goto fail; va.va_br = br; va.va_cvec = vec; va.va_dmaaddr = sc->sc_dmaaddr; va.va_dmasize = sc->sc_dmasize; *sc->sc_intmsk = c; /* Allow interrupts during attach */ config_attach(parent, cf, &va, vsbus_print, CFARGS_NONE); *sc->sc_intmsk = 0; return 0; fail: printf("%s%d at %s csr 0x%x %s\n", cf->cf_name, cf->cf_unit, device_xname(parent), cf->cf_loc[VSBUSCF_CSR], (i ? "zero vector" : "didn't interrupt")); forgetit: return 0; } /* * Sets a new interrupt mask. Returns the old one. * Works like spl functions. */ unsigned char vsbus_setmask(int mask) { struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); unsigned char ch; if (sc == NULL) return 0; ch = *sc->sc_intmsk; *sc->sc_intmsk = mask; return ch; } /* * Clears the interrupts in mask. */ void vsbus_clrintr(int mask) { struct vsbus_softc * const sc = device_lookup_private(&vsbus_cd, 0); if (sc == NULL) return; *sc->sc_intclr = mask; } #define puvtopte(va, pmap) \ (((vaddr_t)va < 0x40000000) ? \ &(((pmap)->pm_p0br)[PG_PFNUM(va)]) : \ &(((pmap)->pm_p1br)[PG_PFNUM(va)])) /* * Copy data from/to a user process' space from the DMA area. * Use the physical memory directly. */ void vsbus_copytoproc(struct proc *p, void *fromv, void *tov, int len) { char *from = fromv, *to = tov; struct pmap *pm; struct pte *pte; paddr_t pa; if ((vaddr_t)to & KERNBASE) { /* In kernel space */ memcpy(to, from, len); return; } #ifdef DIAGNOSTIC if (p == NULL) panic("vsbus_copytoproc: no proc"); #endif pm = p->p_vmspace->vm_map.pmap; pte = puvtopte(trunc_page((vaddr_t)to), pm); if ((vaddr_t)to & PGOFSET) { int cz = round_page((vaddr_t)to) - (vaddr_t)to; pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; memcpy((void *)pa, from, uimin(cz, len)); from += cz; to += cz; len -= cz; pte += 8; /* XXX */ } while (len > 0) { pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; memcpy((void *)pa, from, uimin(PAGE_SIZE, len)); from += PAGE_SIZE; to += PAGE_SIZE; len -= PAGE_SIZE; pte += 8; /* XXX */ } } void vsbus_copyfromproc(struct proc *p, void *fromv, void *tov, int len) { char *from = fromv, *to = tov; struct pmap *pm; struct pte *pte; paddr_t pa; if ((vaddr_t)from & KERNBASE) { /* In kernel space */ memcpy(to, from, len); return; } #ifdef DIAGNOSTIC if (p == NULL) panic("vsbus_copyfromproc: no proc"); #endif pm = p->p_vmspace->vm_map.pmap; pte = puvtopte(trunc_page((vaddr_t)from), pm); if ((vaddr_t)from & PGOFSET) { int cz = round_page((vaddr_t)from) - (vaddr_t)from; pa = (pte->pg_pfn << VAX_PGSHIFT) | (PAGE_SIZE - cz) | KERNBASE; memcpy(to, (void *)pa, uimin(cz, len)); from += cz; to += cz; len -= cz; pte += 8; /* XXX */ } while (len > 0) { pa = (pte->pg_pfn << VAX_PGSHIFT) | KERNBASE; memcpy(to, (void *)pa, uimin(PAGE_SIZE, len)); from += PAGE_SIZE; to += PAGE_SIZE; len -= PAGE_SIZE; pte += 8; /* XXX */ } } /* * There can only be one user of the DMA area on VS2k/VS3100 at one * time, so keep track of it here. */ static int vsbus_active = 0; void vsbus_dma_start(struct vsbus_dma *vd) { SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); if (vsbus_active == 0) vsbus_dma_intr(); } void vsbus_dma_intr(void) { struct vsbus_dma *vd; vd = SIMPLEQ_FIRST(&vsbus_dma); if (vd == NULL) { vsbus_active = 0; return; } vsbus_active = 1; SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd_q); (*vd->vd_go)(vd->vd_arg); }