/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* * x86 root nexus driver */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * enable/disable extra checking of function parameters. Useful for debugging * drivers. */ #ifdef DEBUG int rootnex_alloc_check_parms = 1; int rootnex_bind_check_parms = 1; int rootnex_bind_check_inuse = 1; int rootnex_unbind_verify_buffer = 0; int rootnex_sync_check_parms = 1; #else int rootnex_alloc_check_parms = 0; int rootnex_bind_check_parms = 0; int rootnex_bind_check_inuse = 0; int rootnex_unbind_verify_buffer = 0; int rootnex_sync_check_parms = 0; #endif /* Semi-temporary patchables to phase in bug fixes, test drivers, etc. */ int rootnex_bind_fail = 1; int rootnex_bind_warn = 1; uint8_t *rootnex_warn_list; /* bitmasks for rootnex_warn_list. Up to 8 different warnings with uint8_t */ #define ROOTNEX_BIND_WARNING (0x1 << 0) /* * revert back to old broken behavior of always sync'ing entire copy buffer. * This is useful if be have a buggy driver which doesn't correctly pass in * the offset and size into ddi_dma_sync(). */ int rootnex_sync_ignore_params = 0; /* * maximum size that we will allow for a copy buffer. Can be patched on the * fly */ size_t rootnex_max_copybuf_size = 0x100000; /* * For the 64-bit kernel, pre-alloc enough cookies for a 256K buffer plus 1 * page for alignment. For the 32-bit kernel, pre-alloc enough cookies for a * 64K buffer plus 1 page for alignment (we have less kernel space in a 32-bit * kernel). Allocate enough windows to handle a 256K buffer w/ at least 65 * sgllen DMA engine, and enough copybuf buffer state pages to handle 2 pages * (< 8K). We will still need to allocate the copy buffer during bind though * (if we need one). These can only be modified in /etc/system before rootnex * attach. */ #if defined(__amd64) int rootnex_prealloc_cookies = 65; int rootnex_prealloc_windows = 4; int rootnex_prealloc_copybuf = 2; #else int rootnex_prealloc_cookies = 33; int rootnex_prealloc_windows = 4; int rootnex_prealloc_copybuf = 2; #endif /* driver global state */ static rootnex_state_t *rootnex_state; /* shortcut to rootnex counters */ static uint64_t *rootnex_cnt; /* * XXX - does x86 even need these or are they left over from the SPARC days? */ /* statically defined integer/boolean properties for the root node */ static rootnex_intprop_t rootnex_intprp[] = { { "PAGESIZE", PAGESIZE }, { "MMU_PAGESIZE", MMU_PAGESIZE }, { "MMU_PAGEOFFSET", MMU_PAGEOFFSET }, { DDI_RELATIVE_ADDRESSING, 1 }, }; #define NROOT_INTPROPS (sizeof (rootnex_intprp) / sizeof (rootnex_intprop_t)) static struct cb_ops rootnex_cb_ops = { nodev, /* open */ nodev, /* close */ nodev, /* strategy */ nodev, /* print */ nodev, /* dump */ nodev, /* read */ nodev, /* write */ nodev, /* ioctl */ nodev, /* devmap */ nodev, /* mmap */ nodev, /* segmap */ nochpoll, /* chpoll */ ddi_prop_op, /* cb_prop_op */ NULL, /* struct streamtab */ D_NEW | D_MP | D_HOTPLUG, /* compatibility flags */ CB_REV, /* Rev */ nodev, /* cb_aread */ nodev /* cb_awrite */ }; static int rootnex_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp, off_t offset, off_t len, caddr_t *vaddrp); static int rootnex_map_fault(dev_info_t *dip, dev_info_t *rdip, struct hat *hat, struct seg *seg, caddr_t addr, struct devpage *dp, pfn_t pfn, uint_t prot, uint_t lock); static int rootnex_dma_map(dev_info_t *dip, dev_info_t *rdip, struct ddi_dma_req *dmareq, ddi_dma_handle_t *handlep); static int rootnex_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_attr_t *attr, int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep); static int rootnex_dma_freehdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle); static int rootnex_dma_bindhdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, ddi_dma_cookie_t *cookiep, uint_t *ccountp); static int rootnex_dma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle); static int rootnex_dma_sync(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, off_t off, size_t len, uint_t cache_flags); static int rootnex_dma_win(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, uint_t win, off_t *offp, size_t *lenp, ddi_dma_cookie_t *cookiep, uint_t *ccountp); static int rootnex_dma_mctl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, enum ddi_dma_ctlops request, off_t *offp, size_t *lenp, caddr_t *objp, uint_t cache_flags); static int rootnex_ctlops(dev_info_t *dip, dev_info_t *rdip, ddi_ctl_enum_t ctlop, void *arg, void *result); static int rootnex_intr_ops(dev_info_t *pdip, dev_info_t *rdip, ddi_intr_op_t intr_op, ddi_intr_handle_impl_t *hdlp, void *result); static struct bus_ops rootnex_bus_ops = { BUSO_REV, rootnex_map, NULL, NULL, NULL, rootnex_map_fault, rootnex_dma_map, rootnex_dma_allochdl, rootnex_dma_freehdl, rootnex_dma_bindhdl, rootnex_dma_unbindhdl, rootnex_dma_sync, rootnex_dma_win, rootnex_dma_mctl, rootnex_ctlops, ddi_bus_prop_op, i_ddi_rootnex_get_eventcookie, i_ddi_rootnex_add_eventcall, i_ddi_rootnex_remove_eventcall, i_ddi_rootnex_post_event, 0, /* bus_intr_ctl */ 0, /* bus_config */ 0, /* bus_unconfig */ NULL, /* bus_fm_init */ NULL, /* bus_fm_fini */ NULL, /* bus_fm_access_enter */ NULL, /* bus_fm_access_exit */ NULL, /* bus_powr */ rootnex_intr_ops /* bus_intr_op */ }; static int rootnex_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); static int rootnex_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); static struct dev_ops rootnex_ops = { DEVO_REV, 0, ddi_no_info, nulldev, nulldev, rootnex_attach, rootnex_detach, nulldev, &rootnex_cb_ops, &rootnex_bus_ops }; static struct modldrv rootnex_modldrv = { &mod_driverops, "i86pc root nexus %I%", &rootnex_ops }; static struct modlinkage rootnex_modlinkage = { MODREV_1, (void *)&rootnex_modldrv, NULL }; /* * extern hacks */ extern struct seg_ops segdev_ops; extern int ignore_hardware_nodes; /* force flag from ddi_impl.c */ #ifdef DDI_MAP_DEBUG extern int ddi_map_debug_flag; #define ddi_map_debug if (ddi_map_debug_flag) prom_printf #endif #define ptob64(x) (((uint64_t)(x)) << MMU_PAGESHIFT) extern void i86_pp_map(page_t *pp, caddr_t kaddr); extern void i86_va_map(caddr_t vaddr, struct as *asp, caddr_t kaddr); extern int (*psm_intr_ops)(dev_info_t *, ddi_intr_handle_impl_t *, psm_intr_op_t, int *); extern int impl_ddi_sunbus_initchild(dev_info_t *dip); extern void impl_ddi_sunbus_removechild(dev_info_t *dip); /* * Use device arena to use for device control register mappings. * Various kernel memory walkers (debugger, dtrace) need to know * to avoid this address range to prevent undesired device activity. */ extern void *device_arena_alloc(size_t size, int vm_flag); extern void device_arena_free(void * vaddr, size_t size); /* * Internal functions */ static int rootnex_dma_init(); static void rootnex_add_props(dev_info_t *); static int rootnex_ctl_reportdev(dev_info_t *dip); static struct intrspec *rootnex_get_ispec(dev_info_t *rdip, int inum); static int rootnex_ctlops_poke(peekpoke_ctlops_t *in_args); static int rootnex_ctlops_peek(peekpoke_ctlops_t *in_args, void *result); static int rootnex_map_regspec(ddi_map_req_t *mp, caddr_t *vaddrp); static int rootnex_unmap_regspec(ddi_map_req_t *mp, caddr_t *vaddrp); static int rootnex_map_handle(ddi_map_req_t *mp); static void rootnex_clean_dmahdl(ddi_dma_impl_t *hp); static int rootnex_valid_alloc_parms(ddi_dma_attr_t *attr, uint_t maxsegsize); static int rootnex_valid_bind_parms(ddi_dma_req_t *dmareq, ddi_dma_attr_t *attr); static void rootnex_get_sgl(ddi_dma_obj_t *dmar_object, ddi_dma_cookie_t *sgl, rootnex_sglinfo_t *sglinfo); static int rootnex_bind_slowpath(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, rootnex_dma_t *dma, ddi_dma_attr_t *attr, int kmflag); static int rootnex_setup_copybuf(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, rootnex_dma_t *dma, ddi_dma_attr_t *attr); static void rootnex_teardown_copybuf(rootnex_dma_t *dma); static int rootnex_setup_windows(ddi_dma_impl_t *hp, rootnex_dma_t *dma, ddi_dma_attr_t *attr, int kmflag); static void rootnex_teardown_windows(rootnex_dma_t *dma); static void rootnex_init_win(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t *window, ddi_dma_cookie_t *cookie, off_t cur_offset); static void rootnex_setup_cookie(ddi_dma_obj_t *dmar_object, rootnex_dma_t *dma, ddi_dma_cookie_t *cookie, off_t cur_offset, size_t *copybuf_used, page_t **cur_pp); static int rootnex_sgllen_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie, ddi_dma_attr_t *attr, off_t cur_offset); static int rootnex_copybuf_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie, off_t cur_offset, size_t *copybuf_used); static int rootnex_maxxfer_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie); static int rootnex_valid_sync_parms(ddi_dma_impl_t *hp, rootnex_window_t *win, off_t offset, size_t size, uint_t cache_flags); static int rootnex_verify_buffer(rootnex_dma_t *dma); /* * _init() * */ int _init(void) { rootnex_state = NULL; return (mod_install(&rootnex_modlinkage)); } /* * _info() * */ int _info(struct modinfo *modinfop) { return (mod_info(&rootnex_modlinkage, modinfop)); } /* * _fini() * */ int _fini(void) { return (EBUSY); } /* * rootnex_attach() * */ static int rootnex_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) { int e; switch (cmd) { case DDI_ATTACH: break; case DDI_RESUME: return (DDI_SUCCESS); default: return (DDI_FAILURE); } /* * We should only have one instance of rootnex. Save it away since we * don't have an easy way to get it back later. */ ASSERT(rootnex_state == NULL); rootnex_state = kmem_zalloc(sizeof (rootnex_state_t), KM_SLEEP); rootnex_state->r_dip = dip; rootnex_state->r_reserved_msg_printed = B_FALSE; rootnex_cnt = &rootnex_state->r_counters[0]; mutex_init(&rootnex_state->r_peekpoke_mutex, NULL, MUTEX_SPIN, (void *)ipltospl(15)); /* initialize DMA related state */ e = rootnex_dma_init(); if (e != DDI_SUCCESS) { mutex_destroy(&rootnex_state->r_peekpoke_mutex); kmem_free(rootnex_state, sizeof (rootnex_state_t)); return (DDI_FAILURE); } /* Add static root node properties */ rootnex_add_props(dip); /* since we can't call ddi_report_dev() */ cmn_err(CE_CONT, "?root nexus = %s\n", ddi_get_name(dip)); /* Initialize rootnex event handle */ i_ddi_rootnex_init_events(dip); return (DDI_SUCCESS); } /* * rootnex_detach() * */ /*ARGSUSED*/ static int rootnex_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) { switch (cmd) { case DDI_SUSPEND: break; default: return (DDI_FAILURE); } return (DDI_SUCCESS); } /* * rootnex_dma_init() * */ /*ARGSUSED*/ static int rootnex_dma_init() { size_t bufsize; /* * size of our cookie/window/copybuf state needed in dma bind that we * pre-alloc in dma_alloc_handle */ rootnex_state->r_prealloc_cookies = rootnex_prealloc_cookies; rootnex_state->r_prealloc_size = (rootnex_state->r_prealloc_cookies * sizeof (ddi_dma_cookie_t)) + (rootnex_prealloc_windows * sizeof (rootnex_window_t)) + (rootnex_prealloc_copybuf * sizeof (rootnex_pgmap_t)); /* * setup DDI DMA handle kmem cache, align each handle on 64 bytes, * allocate 16 extra bytes for struct pointer alignment * (p->dmai_private & dma->dp_prealloc_buffer) */ bufsize = sizeof (ddi_dma_impl_t) + sizeof (rootnex_dma_t) + rootnex_state->r_prealloc_size + 0x10; rootnex_state->r_dmahdl_cache = kmem_cache_create("rootnex_dmahdl", bufsize, 64, NULL, NULL, NULL, NULL, NULL, 0); if (rootnex_state->r_dmahdl_cache == NULL) { return (DDI_FAILURE); } /* * allocate array to track which major numbers we have printed warnings * for. */ rootnex_warn_list = kmem_zalloc(devcnt * sizeof (*rootnex_warn_list), KM_SLEEP); return (DDI_SUCCESS); } /* * rootnex_add_props() * */ static void rootnex_add_props(dev_info_t *dip) { rootnex_intprop_t *rpp; int i; /* Add static integer/boolean properties to the root node */ rpp = rootnex_intprp; for (i = 0; i < NROOT_INTPROPS; i++) { (void) e_ddi_prop_update_int(DDI_DEV_T_NONE, dip, rpp[i].prop_name, rpp[i].prop_value); } } /* * ************************* * ctlops related routines * ************************* */ /* * rootnex_ctlops() * */ /*ARGSUSED*/ static int rootnex_ctlops(dev_info_t *dip, dev_info_t *rdip, ddi_ctl_enum_t ctlop, void *arg, void *result) { int n, *ptr; struct ddi_parent_private_data *pdp; switch (ctlop) { case DDI_CTLOPS_DMAPMAPC: /* * Return 'partial' to indicate that dma mapping * has to be done in the main MMU. */ return (DDI_DMA_PARTIAL); case DDI_CTLOPS_BTOP: /* * Convert byte count input to physical page units. * (byte counts that are not a page-size multiple * are rounded down) */ *(ulong_t *)result = btop(*(ulong_t *)arg); return (DDI_SUCCESS); case DDI_CTLOPS_PTOB: /* * Convert size in physical pages to bytes */ *(ulong_t *)result = ptob(*(ulong_t *)arg); return (DDI_SUCCESS); case DDI_CTLOPS_BTOPR: /* * Convert byte count input to physical page units * (byte counts that are not a page-size multiple * are rounded up) */ *(ulong_t *)result = btopr(*(ulong_t *)arg); return (DDI_SUCCESS); case DDI_CTLOPS_POKE: return (rootnex_ctlops_poke((peekpoke_ctlops_t *)arg)); case DDI_CTLOPS_PEEK: return (rootnex_ctlops_peek((peekpoke_ctlops_t *)arg, result)); case DDI_CTLOPS_INITCHILD: return (impl_ddi_sunbus_initchild(arg)); case DDI_CTLOPS_UNINITCHILD: impl_ddi_sunbus_removechild(arg); return (DDI_SUCCESS); case DDI_CTLOPS_REPORTDEV: return (rootnex_ctl_reportdev(rdip)); case DDI_CTLOPS_IOMIN: /* * Nothing to do here but reflect back.. */ return (DDI_SUCCESS); case DDI_CTLOPS_REGSIZE: case DDI_CTLOPS_NREGS: break; case DDI_CTLOPS_SIDDEV: if (ndi_dev_is_prom_node(rdip)) return (DDI_SUCCESS); if (ndi_dev_is_persistent_node(rdip)) return (DDI_SUCCESS); return (DDI_FAILURE); case DDI_CTLOPS_POWER: return ((*pm_platform_power)((power_req_t *)arg)); case DDI_CTLOPS_RESERVED0: /* Was DDI_CTLOPS_NINTRS, obsolete */ case DDI_CTLOPS_RESERVED1: /* Was DDI_CTLOPS_POKE_INIT, obsolete */ case DDI_CTLOPS_RESERVED2: /* Was DDI_CTLOPS_POKE_FLUSH, obsolete */ case DDI_CTLOPS_RESERVED3: /* Was DDI_CTLOPS_POKE_FINI, obsolete */ case DDI_CTLOPS_RESERVED4: /* Was DDI_CTLOPS_INTR_HILEVEL, obsolete */ case DDI_CTLOPS_RESERVED5: /* Was DDI_CTLOPS_XLATE_INTRS, obsolete */ if (!rootnex_state->r_reserved_msg_printed) { rootnex_state->r_reserved_msg_printed = B_TRUE; cmn_err(CE_WARN, "Failing ddi_ctlops call(s) for " "1 or more reserved/obsolete operations."); } return (DDI_FAILURE); default: return (DDI_FAILURE); } /* * The rest are for "hardware" properties */ if ((pdp = ddi_get_parent_data(rdip)) == NULL) return (DDI_FAILURE); if (ctlop == DDI_CTLOPS_NREGS) { ptr = (int *)result; *ptr = pdp->par_nreg; } else { off_t *size = (off_t *)result; ptr = (int *)arg; n = *ptr; if (n >= pdp->par_nreg) { return (DDI_FAILURE); } *size = (off_t)pdp->par_reg[n].regspec_size; } return (DDI_SUCCESS); } /* * rootnex_ctl_reportdev() * */ static int rootnex_ctl_reportdev(dev_info_t *dev) { int i, n, len, f_len = 0; char *buf; buf = kmem_alloc(REPORTDEV_BUFSIZE, KM_SLEEP); f_len += snprintf(buf, REPORTDEV_BUFSIZE, "%s%d at root", ddi_driver_name(dev), ddi_get_instance(dev)); len = strlen(buf); for (i = 0; i < sparc_pd_getnreg(dev); i++) { struct regspec *rp = sparc_pd_getreg(dev, i); if (i == 0) f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, ": "); else f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, " and "); len = strlen(buf); switch (rp->regspec_bustype) { case BTEISA: f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, "%s 0x%x", DEVI_EISA_NEXNAME, rp->regspec_addr); break; case BTISA: f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, "%s 0x%x", DEVI_ISA_NEXNAME, rp->regspec_addr); break; default: f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, "space %x offset %x", rp->regspec_bustype, rp->regspec_addr); break; } len = strlen(buf); } for (i = 0, n = sparc_pd_getnintr(dev); i < n; i++) { int pri; if (i != 0) { f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, ","); len = strlen(buf); } pri = INT_IPL(sparc_pd_getintr(dev, i)->intrspec_pri); f_len += snprintf(buf + len, REPORTDEV_BUFSIZE - len, " sparc ipl %d", pri); len = strlen(buf); } #ifdef DEBUG if (f_len + 1 >= REPORTDEV_BUFSIZE) { cmn_err(CE_NOTE, "next message is truncated: " "printed length 1024, real length %d", f_len); } #endif /* DEBUG */ cmn_err(CE_CONT, "?%s\n", buf); kmem_free(buf, REPORTDEV_BUFSIZE); return (DDI_SUCCESS); } /* * rootnex_ctlops_poke() * */ static int rootnex_ctlops_poke(peekpoke_ctlops_t *in_args) { int err = DDI_SUCCESS; on_trap_data_t otd; /* Cautious access not supported. */ if (in_args->handle != NULL) return (DDI_FAILURE); mutex_enter(&rootnex_state->r_peekpoke_mutex); /* Set up protected environment. */ if (!on_trap(&otd, OT_DATA_ACCESS)) { switch (in_args->size) { case sizeof (uint8_t): *(uint8_t *)in_args->dev_addr = *(uint8_t *) in_args->host_addr; break; case sizeof (uint16_t): *(uint16_t *)in_args->dev_addr = *(uint16_t *)in_args->host_addr; break; case sizeof (uint32_t): *(uint32_t *)in_args->dev_addr = *(uint32_t *)in_args->host_addr; break; case sizeof (uint64_t): *(uint64_t *)in_args->dev_addr = *(uint64_t *)in_args->host_addr; break; default: err = DDI_FAILURE; break; } } else err = DDI_FAILURE; /* Take down protected environment. */ no_trap(); mutex_exit(&rootnex_state->r_peekpoke_mutex); return (err); } /* * rootnex_ctlops_peek() * */ static int rootnex_ctlops_peek(peekpoke_ctlops_t *in_args, void *result) { int err = DDI_SUCCESS; on_trap_data_t otd; /* Cautious access not supported. */ if (in_args->handle != NULL) return (DDI_FAILURE); mutex_enter(&rootnex_state->r_peekpoke_mutex); if (!on_trap(&otd, OT_DATA_ACCESS)) { switch (in_args->size) { case sizeof (uint8_t): *(uint8_t *)in_args->host_addr = *(uint8_t *)in_args->dev_addr; break; case sizeof (uint16_t): *(uint16_t *)in_args->host_addr = *(uint16_t *)in_args->dev_addr; break; case sizeof (uint32_t): *(uint32_t *)in_args->host_addr = *(uint32_t *)in_args->dev_addr; break; case sizeof (uint64_t): *(uint64_t *)in_args->host_addr = *(uint64_t *)in_args->dev_addr; break; default: err = DDI_FAILURE; break; } result = (void *)in_args->host_addr; } else err = DDI_FAILURE; no_trap(); mutex_exit(&rootnex_state->r_peekpoke_mutex); return (err); } /* * ****************** * map related code * ****************** */ /* * rootnex_map() * */ static int rootnex_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp, off_t offset, off_t len, caddr_t *vaddrp) { struct regspec *rp, tmp_reg; ddi_map_req_t mr = *mp; /* Get private copy of request */ int error; mp = &mr; switch (mp->map_op) { case DDI_MO_MAP_LOCKED: case DDI_MO_UNMAP: case DDI_MO_MAP_HANDLE: break; default: #ifdef DDI_MAP_DEBUG cmn_err(CE_WARN, "rootnex_map: unimplemented map op %d.", mp->map_op); #endif /* DDI_MAP_DEBUG */ return (DDI_ME_UNIMPLEMENTED); } if (mp->map_flags & DDI_MF_USER_MAPPING) { #ifdef DDI_MAP_DEBUG cmn_err(CE_WARN, "rootnex_map: unimplemented map type: user."); #endif /* DDI_MAP_DEBUG */ return (DDI_ME_UNIMPLEMENTED); } /* * First, if given an rnumber, convert it to a regspec... * (Presumably, this is on behalf of a child of the root node?) */ if (mp->map_type == DDI_MT_RNUMBER) { int rnumber = mp->map_obj.rnumber; #ifdef DDI_MAP_DEBUG static char *out_of_range = "rootnex_map: Out of range rnumber <%d>, device <%s>"; #endif /* DDI_MAP_DEBUG */ rp = i_ddi_rnumber_to_regspec(rdip, rnumber); if (rp == NULL) { #ifdef DDI_MAP_DEBUG cmn_err(CE_WARN, out_of_range, rnumber, ddi_get_name(rdip)); #endif /* DDI_MAP_DEBUG */ return (DDI_ME_RNUMBER_RANGE); } /* * Convert the given ddi_map_req_t from rnumber to regspec... */ mp->map_type = DDI_MT_REGSPEC; mp->map_obj.rp = rp; } /* * Adjust offset and length correspnding to called values... * XXX: A non-zero length means override the one in the regspec * XXX: (regardless of what's in the parent's range?) */ tmp_reg = *(mp->map_obj.rp); /* Preserve underlying data */ rp = mp->map_obj.rp = &tmp_reg; /* Use tmp_reg in request */ #ifdef DDI_MAP_DEBUG cmn_err(CE_CONT, "rootnex: <%s,%s> <0x%x, 0x%x, 0x%d>" " offset %d len %d handle 0x%x\n", ddi_get_name(dip), ddi_get_name(rdip), rp->regspec_bustype, rp->regspec_addr, rp->regspec_size, offset, len, mp->map_handlep); #endif /* DDI_MAP_DEBUG */ /* * I/O or memory mapping: * * : memory * : i/o * 1, addr=0, len=x>: x86-compatibility i/o */ if (rp->regspec_bustype > 1 && rp->regspec_addr != 0) { cmn_err(CE_WARN, "<%s,%s> invalid register spec" " <0x%x, 0x%x, 0x%x>", ddi_get_name(dip), ddi_get_name(rdip), rp->regspec_bustype, rp->regspec_addr, rp->regspec_size); return (DDI_ME_INVAL); } if (rp->regspec_bustype > 1 && rp->regspec_addr == 0) { /* * compatibility i/o mapping */ rp->regspec_bustype += (uint_t)offset; } else { /* * Normal memory or i/o mapping */ rp->regspec_addr += (uint_t)offset; } if (len != 0) rp->regspec_size = (uint_t)len; #ifdef DDI_MAP_DEBUG cmn_err(CE_CONT, " <%s,%s> <0x%x, 0x%x, 0x%d>" " offset %d len %d handle 0x%x\n", ddi_get_name(dip), ddi_get_name(rdip), rp->regspec_bustype, rp->regspec_addr, rp->regspec_size, offset, len, mp->map_handlep); #endif /* DDI_MAP_DEBUG */ /* * Apply any parent ranges at this level, if applicable. * (This is where nexus specific regspec translation takes place. * Use of this function is implicit agreement that translation is * provided via ddi_apply_range.) */ #ifdef DDI_MAP_DEBUG ddi_map_debug("applying range of parent <%s> to child <%s>...\n", ddi_get_name(dip), ddi_get_name(rdip)); #endif /* DDI_MAP_DEBUG */ if ((error = i_ddi_apply_range(dip, rdip, mp->map_obj.rp)) != 0) return (error); switch (mp->map_op) { case DDI_MO_MAP_LOCKED: /* * Set up the locked down kernel mapping to the regspec... */ return (rootnex_map_regspec(mp, vaddrp)); case DDI_MO_UNMAP: /* * Release mapping... */ return (rootnex_unmap_regspec(mp, vaddrp)); case DDI_MO_MAP_HANDLE: return (rootnex_map_handle(mp)); default: return (DDI_ME_UNIMPLEMENTED); } } /* * rootnex_map_fault() * * fault in mappings for requestors */ /*ARGSUSED*/ static int rootnex_map_fault(dev_info_t *dip, dev_info_t *rdip, struct hat *hat, struct seg *seg, caddr_t addr, struct devpage *dp, pfn_t pfn, uint_t prot, uint_t lock) { #ifdef DDI_MAP_DEBUG ddi_map_debug("rootnex_map_fault: address <%x> pfn <%x>", addr, pfn); ddi_map_debug(" Seg <%s>\n", seg->s_ops == &segdev_ops ? "segdev" : seg == &kvseg ? "segkmem" : "NONE!"); #endif /* DDI_MAP_DEBUG */ /* * This is all terribly broken, but it is a start * * XXX Note that this test means that segdev_ops * must be exported from seg_dev.c. * XXX What about devices with their own segment drivers? */ if (seg->s_ops == &segdev_ops) { struct segdev_data *sdp = (struct segdev_data *)seg->s_data; if (hat == NULL) { /* * This is one plausible interpretation of * a null hat i.e. use the first hat on the * address space hat list which by convention is * the hat of the system MMU. At alternative * would be to panic .. this might well be better .. */ ASSERT(AS_READ_HELD(seg->s_as, &seg->s_as->a_lock)); hat = seg->s_as->a_hat; cmn_err(CE_NOTE, "rootnex_map_fault: nil hat"); } hat_devload(hat, addr, MMU_PAGESIZE, pfn, prot | sdp->hat_attr, (lock ? HAT_LOAD_LOCK : HAT_LOAD)); } else if (seg == &kvseg && dp == NULL) { hat_devload(kas.a_hat, addr, MMU_PAGESIZE, pfn, prot, HAT_LOAD_LOCK); } else return (DDI_FAILURE); return (DDI_SUCCESS); } /* * rootnex_map_regspec() * we don't support mapping of I/O cards above 4Gb */ static int rootnex_map_regspec(ddi_map_req_t *mp, caddr_t *vaddrp) { ulong_t base; void *cvaddr; uint_t npages, pgoffset; struct regspec *rp; ddi_acc_hdl_t *hp; ddi_acc_impl_t *ap; uint_t hat_acc_flags; rp = mp->map_obj.rp; hp = mp->map_handlep; #ifdef DDI_MAP_DEBUG ddi_map_debug( "rootnex_map_regspec: <0x%x 0x%x 0x%x> handle 0x%x\n", rp->regspec_bustype, rp->regspec_addr, rp->regspec_size, mp->map_handlep); #endif /* DDI_MAP_DEBUG */ /* * I/O or memory mapping * * : memory * : i/o * 1, addr=0, len=x>: x86-compatibility i/o */ if (rp->regspec_bustype > 1 && rp->regspec_addr != 0) { cmn_err(CE_WARN, "rootnex: invalid register spec" " <0x%x, 0x%x, 0x%x>", rp->regspec_bustype, rp->regspec_addr, rp->regspec_size); return (DDI_FAILURE); } if (rp->regspec_bustype != 0) { /* * I/O space - needs a handle. */ if (hp == NULL) { return (DDI_FAILURE); } ap = (ddi_acc_impl_t *)hp->ah_platform_private; ap->ahi_acc_attr |= DDI_ACCATTR_IO_SPACE; impl_acc_hdl_init(hp); if (mp->map_flags & DDI_MF_DEVICE_MAPPING) { #ifdef DDI_MAP_DEBUG ddi_map_debug("rootnex_map_regspec: mmap() \ to I/O space is not supported.\n"); #endif /* DDI_MAP_DEBUG */ return (DDI_ME_INVAL); } else { /* * 1275-compliant vs. compatibility i/o mapping */ *vaddrp = (rp->regspec_bustype > 1 && rp->regspec_addr == 0) ? ((caddr_t)(uintptr_t)rp->regspec_bustype) : ((caddr_t)(uintptr_t)rp->regspec_addr); } #ifdef DDI_MAP_DEBUG ddi_map_debug( "rootnex_map_regspec: \"Mapping\" %d bytes I/O space at 0x%x\n", rp->regspec_size, *vaddrp); #endif /* DDI_MAP_DEBUG */ return (DDI_SUCCESS); } /* * Memory space */ if (hp != NULL) { /* * hat layer ignores * hp->ah_acc.devacc_attr_endian_flags. */ switch (hp->ah_acc.devacc_attr_dataorder) { case DDI_STRICTORDER_ACC: hat_acc_flags = HAT_STRICTORDER; break; case DDI_UNORDERED_OK_ACC: hat_acc_flags = HAT_UNORDERED_OK; break; case DDI_MERGING_OK_ACC: hat_acc_flags = HAT_MERGING_OK; break; case DDI_LOADCACHING_OK_ACC: hat_acc_flags = HAT_LOADCACHING_OK; break; case DDI_STORECACHING_OK_ACC: hat_acc_flags = HAT_STORECACHING_OK; break; } ap = (ddi_acc_impl_t *)hp->ah_platform_private; ap->ahi_acc_attr |= DDI_ACCATTR_CPU_VADDR; impl_acc_hdl_init(hp); hp->ah_hat_flags = hat_acc_flags; } else { hat_acc_flags = HAT_STRICTORDER; } base = (ulong_t)rp->regspec_addr & (~MMU_PAGEOFFSET); /* base addr */ pgoffset = (ulong_t)rp->regspec_addr & MMU_PAGEOFFSET; /* offset */ if (rp->regspec_size == 0) { #ifdef DDI_MAP_DEBUG ddi_map_debug("rootnex_map_regspec: zero regspec_size\n"); #endif /* DDI_MAP_DEBUG */ return (DDI_ME_INVAL); } if (mp->map_flags & DDI_MF_DEVICE_MAPPING) { *vaddrp = (caddr_t)mmu_btop(base); } else { npages = mmu_btopr(rp->regspec_size + pgoffset); #ifdef DDI_MAP_DEBUG ddi_map_debug("rootnex_map_regspec: Mapping %d pages \ physical %x ", npages, base); #endif /* DDI_MAP_DEBUG */ cvaddr = device_arena_alloc(ptob(npages), VM_NOSLEEP); if (cvaddr == NULL) return (DDI_ME_NORESOURCES); /* * Now map in the pages we've allocated... */ hat_devload(kas.a_hat, cvaddr, mmu_ptob(npages), mmu_btop(base), mp->map_prot | hat_acc_flags, HAT_LOAD_LOCK); *vaddrp = (caddr_t)cvaddr + pgoffset; } #ifdef DDI_MAP_DEBUG ddi_map_debug("at virtual 0x%x\n", *vaddrp); #endif /* DDI_MAP_DEBUG */ return (DDI_SUCCESS); } /* * rootnex_unmap_regspec() * */ static int rootnex_unmap_regspec(ddi_map_req_t *mp, caddr_t *vaddrp) { caddr_t addr = (caddr_t)*vaddrp; uint_t npages, pgoffset; struct regspec *rp; if (mp->map_flags & DDI_MF_DEVICE_MAPPING) return (0); rp = mp->map_obj.rp; if (rp->regspec_size == 0) { #ifdef DDI_MAP_DEBUG ddi_map_debug("rootnex_unmap_regspec: zero regspec_size\n"); #endif /* DDI_MAP_DEBUG */ return (DDI_ME_INVAL); } /* * I/O or memory mapping: * * : memory * : i/o * 1, addr=0, len=x>: x86-compatibility i/o */ if (rp->regspec_bustype != 0) { /* * This is I/O space, which requires no particular * processing on unmap since it isn't mapped in the * first place. */ return (DDI_SUCCESS); } /* * Memory space */ pgoffset = (uintptr_t)addr & MMU_PAGEOFFSET; npages = mmu_btopr(rp->regspec_size + pgoffset); hat_unload(kas.a_hat, addr - pgoffset, ptob(npages), HAT_UNLOAD_UNLOCK); device_arena_free(addr - pgoffset, ptob(npages)); /* * Destroy the pointer - the mapping has logically gone */ *vaddrp = NULL; return (DDI_SUCCESS); } /* * rootnex_map_handle() * */ static int rootnex_map_handle(ddi_map_req_t *mp) { ddi_acc_hdl_t *hp; ulong_t base; uint_t pgoffset; struct regspec *rp; rp = mp->map_obj.rp; #ifdef DDI_MAP_DEBUG ddi_map_debug( "rootnex_map_handle: <0x%x 0x%x 0x%x> handle 0x%x\n", rp->regspec_bustype, rp->regspec_addr, rp->regspec_size, mp->map_handlep); #endif /* DDI_MAP_DEBUG */ /* * I/O or memory mapping: * * : memory * : i/o * 1, addr=0, len=x>: x86-compatibility i/o */ if (rp->regspec_bustype != 0) { /* * This refers to I/O space, and we don't support "mapping" * I/O space to a user. */ return (DDI_FAILURE); } /* * Set up the hat_flags for the mapping. */ hp = mp->map_handlep; switch (hp->ah_acc.devacc_attr_endian_flags) { case DDI_NEVERSWAP_ACC: hp->ah_hat_flags = HAT_NEVERSWAP | HAT_STRICTORDER; break; case DDI_STRUCTURE_LE_ACC: hp->ah_hat_flags = HAT_STRUCTURE_LE; break; case DDI_STRUCTURE_BE_ACC: return (DDI_FAILURE); default: return (DDI_REGS_ACC_CONFLICT); } switch (hp->ah_acc.devacc_attr_dataorder) { case DDI_STRICTORDER_ACC: break; case DDI_UNORDERED_OK_ACC: hp->ah_hat_flags |= HAT_UNORDERED_OK; break; case DDI_MERGING_OK_ACC: hp->ah_hat_flags |= HAT_MERGING_OK; break; case DDI_LOADCACHING_OK_ACC: hp->ah_hat_flags |= HAT_LOADCACHING_OK; break; case DDI_STORECACHING_OK_ACC: hp->ah_hat_flags |= HAT_STORECACHING_OK; break; default: return (DDI_FAILURE); } base = (ulong_t)rp->regspec_addr & (~MMU_PAGEOFFSET); /* base addr */ pgoffset = (ulong_t)rp->regspec_addr & MMU_PAGEOFFSET; /* offset */ if (rp->regspec_size == 0) return (DDI_ME_INVAL); hp->ah_pfn = mmu_btop(base); hp->ah_pnum = mmu_btopr(rp->regspec_size + pgoffset); return (DDI_SUCCESS); } /* * ************************ * interrupt related code * ************************ */ /* * rootnex_intr_ops() * bus_intr_op() function for interrupt support */ /* ARGSUSED */ static int rootnex_intr_ops(dev_info_t *pdip, dev_info_t *rdip, ddi_intr_op_t intr_op, ddi_intr_handle_impl_t *hdlp, void *result) { struct intrspec *ispec; struct ddi_parent_private_data *pdp; DDI_INTR_NEXDBG((CE_CONT, "rootnex_intr_ops: pdip = %p, rdip = %p, intr_op = %x, hdlp = %p\n", (void *)pdip, (void *)rdip, intr_op, (void *)hdlp)); /* Process the interrupt operation */ switch (intr_op) { case DDI_INTROP_GETCAP: /* First check with pcplusmp */ if (psm_intr_ops == NULL) return (DDI_FAILURE); if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_GET_CAP, result)) { *(int *)result = 0; return (DDI_FAILURE); } break; case DDI_INTROP_SETCAP: if (psm_intr_ops == NULL) return (DDI_FAILURE); if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_CAP, result)) return (DDI_FAILURE); break; case DDI_INTROP_ALLOC: if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) return (DDI_FAILURE); hdlp->ih_pri = ispec->intrspec_pri; *(int *)result = hdlp->ih_scratch1; break; case DDI_INTROP_FREE: pdp = ddi_get_parent_data(rdip); /* * Special case for 'pcic' driver' only. * If an intrspec was created for it, clean it up here * See detailed comments on this in the function * rootnex_get_ispec(). */ if (pdp->par_intr && strcmp(ddi_get_name(rdip), "pcic") == 0) { kmem_free(pdp->par_intr, sizeof (struct intrspec) * pdp->par_nintr); /* * Set it to zero; so that * DDI framework doesn't free it again */ pdp->par_intr = NULL; pdp->par_nintr = 0; } break; case DDI_INTROP_GETPRI: if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) return (DDI_FAILURE); *(int *)result = ispec->intrspec_pri; break; case DDI_INTROP_SETPRI: /* Validate the interrupt priority passed to us */ if (*(int *)result > LOCK_LEVEL) return (DDI_FAILURE); /* Ensure that PSM is all initialized and ispec is ok */ if ((psm_intr_ops == NULL) || ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL)) return (DDI_FAILURE); /* Change the priority */ if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_PRI, result) == PSM_FAILURE) return (DDI_FAILURE); /* update the ispec with the new priority */ ispec->intrspec_pri = *(int *)result; break; case DDI_INTROP_ADDISR: if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) return (DDI_FAILURE); ispec->intrspec_func = hdlp->ih_cb_func; break; case DDI_INTROP_REMISR: if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) return (DDI_FAILURE); ispec->intrspec_func = (uint_t (*)()) 0; break; case DDI_INTROP_ENABLE: if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) return (DDI_FAILURE); /* Call psmi to translate irq with the dip */ if (psm_intr_ops == NULL) return (DDI_FAILURE); ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec; (void) (*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_XLATE_VECTOR, (int *)&hdlp->ih_vector); /* Add the interrupt handler */ if (!add_avintr((void *)hdlp, ispec->intrspec_pri, hdlp->ih_cb_func, DEVI(rdip)->devi_name, hdlp->ih_vector, hdlp->ih_cb_arg1, hdlp->ih_cb_arg2, NULL, rdip)) return (DDI_FAILURE); break; case DDI_INTROP_DISABLE: if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) return (DDI_FAILURE); /* Call psm_ops() to translate irq with the dip */ if (psm_intr_ops == NULL) return (DDI_FAILURE); ((ihdl_plat_t *)hdlp->ih_private)->ip_ispecp = ispec; (void) (*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_XLATE_VECTOR, (int *)&hdlp->ih_vector); /* Remove the interrupt handler */ rem_avintr((void *)hdlp, ispec->intrspec_pri, hdlp->ih_cb_func, hdlp->ih_vector); break; case DDI_INTROP_SETMASK: if (psm_intr_ops == NULL) return (DDI_FAILURE); if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_SET_MASK, NULL)) return (DDI_FAILURE); break; case DDI_INTROP_CLRMASK: if (psm_intr_ops == NULL) return (DDI_FAILURE); if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_CLEAR_MASK, NULL)) return (DDI_FAILURE); break; case DDI_INTROP_GETPENDING: if (psm_intr_ops == NULL) return (DDI_FAILURE); if ((*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_GET_PENDING, result)) { *(int *)result = 0; return (DDI_FAILURE); } break; case DDI_INTROP_NINTRS: if ((pdp = ddi_get_parent_data(rdip)) == NULL) return (DDI_FAILURE); *(int *)result = pdp->par_nintr; if (pdp->par_nintr == 0) { /* * Special case for 'pcic' driver' only. This driver * driver is a child of 'isa' and 'rootnex' drivers. * * See detailed comments on this in the function * rootnex_get_ispec(). * * Children of 'pcic' send 'NINITR' request all the * way to rootnex driver. But, the 'pdp->par_nintr' * field may not initialized. So, we fake it here * to return 1 (a la what PCMCIA nexus does). */ if (strcmp(ddi_get_name(rdip), "pcic") == 0) *(int *)result = 1; } break; case DDI_INTROP_SUPPORTED_TYPES: *(int *)result = 0; *(int *)result |= DDI_INTR_TYPE_FIXED; /* Always ... */ break; case DDI_INTROP_NAVAIL: if ((ispec = rootnex_get_ispec(rdip, hdlp->ih_inum)) == NULL) return (DDI_FAILURE); if (psm_intr_ops == NULL) { *(int *)result = 1; break; } /* Priority in the handle not initialized yet */ hdlp->ih_pri = ispec->intrspec_pri; (void) (*psm_intr_ops)(rdip, hdlp, PSM_INTR_OP_NAVAIL_VECTORS, result); break; default: return (DDI_FAILURE); } return (DDI_SUCCESS); } /* * rootnex_get_ispec() * convert an interrupt number to an interrupt specification. * The interrupt number determines which interrupt spec will be * returned if more than one exists. * * Look into the parent private data area of the 'rdip' to find out * the interrupt specification. First check to make sure there is * one that matchs "inumber" and then return a pointer to it. * * Return NULL if one could not be found. * * NOTE: This is needed for rootnex_intr_ops() */ static struct intrspec * rootnex_get_ispec(dev_info_t *rdip, int inum) { struct ddi_parent_private_data *pdp = ddi_get_parent_data(rdip); /* * Special case handling for drivers that provide their own * intrspec structures instead of relying on the DDI framework. * * A broken hardware driver in ON could potentially provide its * own intrspec structure, instead of relying on the hardware. * If these drivers are children of 'rootnex' then we need to * continue to provide backward compatibility to them here. * * Following check is a special case for 'pcic' driver which * was found to have broken hardwre andby provides its own intrspec. * * Verbatim comments from this driver are shown here: * "Don't use the ddi_add_intr since we don't have a * default intrspec in all cases." * * Since an 'ispec' may not be always created for it, * check for that and create one if so. * * NOTE: Currently 'pcic' is the only driver found to do this. */ if (!pdp->par_intr && strcmp(ddi_get_name(rdip), "pcic") == 0) { pdp->par_nintr = 1; pdp->par_intr = kmem_zalloc(sizeof (struct intrspec) * pdp->par_nintr, KM_SLEEP); } /* Validate the interrupt number */ if (inum >= pdp->par_nintr) return (NULL); /* Get the interrupt structure pointer and return that */ return ((struct intrspec *)&pdp->par_intr[inum]); } /* * ****************** * dma related code * ****************** */ /* * rootnex_dma_allochdl() * called from ddi_dma_alloc_handle(). */ /*ARGSUSED*/ static int rootnex_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_attr_t *attr, int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep) { uint64_t maxsegmentsize_ll; uint_t maxsegmentsize; ddi_dma_impl_t *hp; rootnex_dma_t *dma; uint64_t count_max; uint64_t seg; int kmflag; int e; /* convert our sleep flags */ if (waitfp == DDI_DMA_SLEEP) { kmflag = KM_SLEEP; } else { kmflag = KM_NOSLEEP; } /* * We try to do only one memory allocation here. We'll do a little * pointer manipulation later. If the bind ends up taking more than * our prealloc's space, we'll have to allocate more memory in the * bind operation. Not great, but much better than before and the * best we can do with the current bind interfaces. */ hp = kmem_cache_alloc(rootnex_state->r_dmahdl_cache, kmflag); if (hp == NULL) { if (waitfp != DDI_DMA_DONTWAIT) { ddi_set_callback(waitfp, arg, &rootnex_state->r_dvma_call_list_id); } return (DDI_DMA_NORESOURCES); } /* Do our pointer manipulation now, align the structures */ hp->dmai_private = (void *)(((uintptr_t)hp + (uintptr_t)sizeof (ddi_dma_impl_t) + 0x7) & ~0x7); dma = (rootnex_dma_t *)hp->dmai_private; dma->dp_prealloc_buffer = (uchar_t *)(((uintptr_t)dma + sizeof (rootnex_dma_t) + 0x7) & ~0x7); /* setup the handle */ rootnex_clean_dmahdl(hp); dma->dp_dip = rdip; dma->dp_sglinfo.si_min_addr = attr->dma_attr_addr_lo; dma->dp_sglinfo.si_max_addr = attr->dma_attr_addr_hi; hp->dmai_minxfer = attr->dma_attr_minxfer; hp->dmai_burstsizes = attr->dma_attr_burstsizes; hp->dmai_rdip = rdip; hp->dmai_attr = *attr; /* we don't need to worry about the SPL since we do a tryenter */ mutex_init(&dma->dp_mutex, NULL, MUTEX_DRIVER, NULL); /* * Figure out our maximum segment size. If the segment size is greater * than 4G, we will limit it to (4G - 1) since the max size of a dma * object (ddi_dma_obj_t.dmao_size) is 32 bits. dma_attr_seg and * dma_attr_count_max are size-1 type values. * * Maximum segment size is the largest physically contiguous chunk of * memory that we can return from a bind (i.e. the maximum size of a * single cookie). */ /* handle the rollover cases */ seg = attr->dma_attr_seg + 1; if (seg < attr->dma_attr_seg) { seg = attr->dma_attr_seg; } count_max = attr->dma_attr_count_max + 1; if (count_max < attr->dma_attr_count_max) { count_max = attr->dma_attr_count_max; } /* * granularity may or may not be a power of two. If it isn't, we can't * use a simple mask. */ if (attr->dma_attr_granular & (attr->dma_attr_granular - 1)) { dma->dp_granularity_power_2 = B_FALSE; } else { dma->dp_granularity_power_2 = B_TRUE; } /* * maxxfer should be a whole multiple of granularity. If we're going to * break up a window because we're greater than maxxfer, we might as * well make sure it's maxxfer is a whole multiple so we don't have to * worry about triming the window later on for this case. */ if (attr->dma_attr_granular > 1) { if (dma->dp_granularity_power_2) { dma->dp_maxxfer = attr->dma_attr_maxxfer - (attr->dma_attr_maxxfer & (attr->dma_attr_granular - 1)); } else { dma->dp_maxxfer = attr->dma_attr_maxxfer - (attr->dma_attr_maxxfer % attr->dma_attr_granular); } } else { dma->dp_maxxfer = attr->dma_attr_maxxfer; } maxsegmentsize_ll = MIN(seg, dma->dp_maxxfer); maxsegmentsize_ll = MIN(maxsegmentsize_ll, count_max); if (maxsegmentsize_ll == 0 || (maxsegmentsize_ll > 0xFFFFFFFF)) { maxsegmentsize = 0xFFFFFFFF; } else { maxsegmentsize = maxsegmentsize_ll; } dma->dp_sglinfo.si_max_cookie_size = maxsegmentsize; dma->dp_sglinfo.si_segmask = attr->dma_attr_seg; /* check the ddi_dma_attr arg to make sure it makes a little sense */ if (rootnex_alloc_check_parms) { e = rootnex_valid_alloc_parms(attr, maxsegmentsize); if (e != DDI_SUCCESS) { ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_ALLOC_FAIL]); (void) rootnex_dma_freehdl(dip, rdip, (ddi_dma_handle_t)hp); return (e); } } *handlep = (ddi_dma_handle_t)hp; ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); DTRACE_PROBE1(rootnex__alloc__handle, uint64_t, rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); return (DDI_SUCCESS); } /* * rootnex_dma_freehdl() * called from ddi_dma_free_handle(). */ /*ARGSUSED*/ static int rootnex_dma_freehdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle) { ddi_dma_impl_t *hp; rootnex_dma_t *dma; hp = (ddi_dma_impl_t *)handle; dma = (rootnex_dma_t *)hp->dmai_private; /* unbind should have been called first */ ASSERT(!dma->dp_inuse); mutex_destroy(&dma->dp_mutex); kmem_cache_free(rootnex_state->r_dmahdl_cache, hp); ROOTNEX_PROF_DEC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); DTRACE_PROBE1(rootnex__free__handle, uint64_t, rootnex_cnt[ROOTNEX_CNT_ACTIVE_HDLS]); if (rootnex_state->r_dvma_call_list_id) ddi_run_callback(&rootnex_state->r_dvma_call_list_id); return (DDI_SUCCESS); } /* * rootnex_dma_bindhdl() * called from ddi_dma_addr_bind_handle() and ddi_dma_buf_bind_handle(). */ /*ARGSUSED*/ static int rootnex_dma_bindhdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, struct ddi_dma_req *dmareq, ddi_dma_cookie_t *cookiep, uint_t *ccountp) { rootnex_sglinfo_t *sinfo; ddi_dma_attr_t *attr; ddi_dma_impl_t *hp; rootnex_dma_t *dma; int kmflag; int e; hp = (ddi_dma_impl_t *)handle; dma = (rootnex_dma_t *)hp->dmai_private; sinfo = &dma->dp_sglinfo; attr = &hp->dmai_attr; hp->dmai_rflags = dmareq->dmar_flags & DMP_DDIFLAGS; /* * This is useful for debugging a driver. Not as useful in a production * system. The only time this will fail is if you have a driver bug. */ if (rootnex_bind_check_inuse) { /* * No one else should ever have this lock unless someone else * is trying to use this handle. So contention on the lock * is the same as inuse being set. */ e = mutex_tryenter(&dma->dp_mutex); if (e == 0) { ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); return (DDI_DMA_INUSE); } if (dma->dp_inuse) { mutex_exit(&dma->dp_mutex); ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); return (DDI_DMA_INUSE); } dma->dp_inuse = B_TRUE; mutex_exit(&dma->dp_mutex); } /* check the ddi_dma_attr arg to make sure it makes a little sense */ if (rootnex_bind_check_parms) { e = rootnex_valid_bind_parms(dmareq, attr); if (e != DDI_SUCCESS) { ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); rootnex_clean_dmahdl(hp); return (e); } } /* save away the original bind info */ dma->dp_dma = dmareq->dmar_object; /* * Figure out a rough estimate of what maximum number of pages this * buffer could use (a high estimate of course). */ sinfo->si_max_pages = mmu_btopr(dma->dp_dma.dmao_size) + 1; /* * We'll use the pre-allocated cookies for any bind that will *always* * fit (more important to be consistent, we don't want to create * additional degenerate cases). */ if (sinfo->si_max_pages <= rootnex_state->r_prealloc_cookies) { dma->dp_cookies = (ddi_dma_cookie_t *)dma->dp_prealloc_buffer; dma->dp_need_to_free_cookie = B_FALSE; DTRACE_PROBE2(rootnex__bind__prealloc, dev_info_t *, rdip, uint_t, sinfo->si_max_pages); /* * For anything larger than that, we'll go ahead and allocate the * maximum number of pages we expect to see. Hopefuly, we won't be * seeing this path in the fast path for high performance devices very * frequently. * * a ddi bind interface that allowed the driver to provide storage to * the bind interface would speed this case up. */ } else { /* convert the sleep flags */ if (dmareq->dmar_fp == DDI_DMA_SLEEP) { kmflag = KM_SLEEP; } else { kmflag = KM_NOSLEEP; } /* * Save away how much memory we allocated. If we're doing a * nosleep, the alloc could fail... */ dma->dp_cookie_size = sinfo->si_max_pages * sizeof (ddi_dma_cookie_t); dma->dp_cookies = kmem_alloc(dma->dp_cookie_size, kmflag); if (dma->dp_cookies == NULL) { ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); rootnex_clean_dmahdl(hp); return (DDI_DMA_NORESOURCES); } dma->dp_need_to_free_cookie = B_TRUE; DTRACE_PROBE2(rootnex__bind__alloc, dev_info_t *, rdip, uint_t, sinfo->si_max_pages); } hp->dmai_cookie = dma->dp_cookies; /* * Get the real sgl. rootnex_get_sgl will fill in cookie array while * looking at the contraints in the dma structure. It will then put some * additional state about the sgl in the dma struct (i.e. is the sgl * clean, or do we need to do some munging; how many pages need to be * copied, etc.) */ rootnex_get_sgl(&dmareq->dmar_object, dma->dp_cookies, &dma->dp_sglinfo); ASSERT(sinfo->si_sgl_size <= sinfo->si_max_pages); /* if we don't need a copy buffer, we don't need to sync */ if (sinfo->si_copybuf_req == 0) { hp->dmai_rflags |= DMP_NOSYNC; } /* * if we don't need the copybuf and we don't need to do a partial, we * hit the fast path. All the high performance devices should be trying * to hit this path. To hit this path, a device should be able to reach * all of memory, shouldn't try to bind more than it can transfer, and * the buffer shouldn't require more cookies than the driver/device can * handle [sgllen]). */ if ((sinfo->si_copybuf_req == 0) && (sinfo->si_sgl_size <= attr->dma_attr_sgllen) && (dma->dp_dma.dmao_size < dma->dp_maxxfer)) { /* * copy out the first cookie and ccountp, set the cookie * pointer to the second cookie. The first cookie is passed * back on the stack. Additional cookies are accessed via * ddi_dma_nextcookie() */ *cookiep = dma->dp_cookies[0]; *ccountp = sinfo->si_sgl_size; hp->dmai_cookie++; hp->dmai_rflags &= ~DDI_DMA_PARTIAL; hp->dmai_nwin = 1; ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); DTRACE_PROBE3(rootnex__bind__fast, dev_info_t *, rdip, uint64_t, rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS], uint_t, dma->dp_dma.dmao_size); return (DDI_DMA_MAPPED); } /* * go to the slow path, we may need to alloc more memory, create * multiple windows, and munge up a sgl to make the device happy. */ e = rootnex_bind_slowpath(hp, dmareq, dma, attr, kmflag); if ((e != DDI_DMA_MAPPED) && (e != DDI_DMA_PARTIAL_MAP)) { if (dma->dp_need_to_free_cookie) { kmem_free(dma->dp_cookies, dma->dp_cookie_size); } ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_BIND_FAIL]); rootnex_clean_dmahdl(hp); /* must be after free cookie */ return (e); } /* if the first window uses the copy buffer, sync it for the device */ if ((dma->dp_window[dma->dp_current_win].wd_dosync) && (hp->dmai_rflags & DDI_DMA_WRITE)) { (void) rootnex_dma_sync(dip, rdip, handle, 0, 0, DDI_DMA_SYNC_FORDEV); } /* * copy out the first cookie and ccountp, set the cookie pointer to the * second cookie. Make sure the partial flag is set/cleared correctly. * If we have a partial map (i.e. multiple windows), the number of * cookies we return is the number of cookies in the first window. */ if (e == DDI_DMA_MAPPED) { hp->dmai_rflags &= ~DDI_DMA_PARTIAL; *ccountp = sinfo->si_sgl_size; } else { hp->dmai_rflags |= DDI_DMA_PARTIAL; *ccountp = dma->dp_window[dma->dp_current_win].wd_cookie_cnt; ASSERT(hp->dmai_nwin <= dma->dp_max_win); } *cookiep = dma->dp_cookies[0]; hp->dmai_cookie++; ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); DTRACE_PROBE3(rootnex__bind__slow, dev_info_t *, rdip, uint64_t, rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS], uint_t, dma->dp_dma.dmao_size); return (e); } /* * rootnex_dma_unbindhdl() * called from ddi_dma_unbind_handle() */ /*ARGSUSED*/ static int rootnex_dma_unbindhdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle) { ddi_dma_impl_t *hp; rootnex_dma_t *dma; int e; hp = (ddi_dma_impl_t *)handle; dma = (rootnex_dma_t *)hp->dmai_private; /* make sure the buffer wasn't free'd before calling unbind */ if (rootnex_unbind_verify_buffer) { e = rootnex_verify_buffer(dma); if (e != DDI_SUCCESS) { ASSERT(0); return (DDI_FAILURE); } } /* sync the current window before unbinding the buffer */ if (dma->dp_window && dma->dp_window[dma->dp_current_win].wd_dosync && (hp->dmai_rflags & DDI_DMA_READ)) { (void) rootnex_dma_sync(dip, rdip, handle, 0, 0, DDI_DMA_SYNC_FORCPU); } /* * cleanup and copy buffer or window state. if we didn't use the copy * buffer or windows, there won't be much to do :-) */ rootnex_teardown_copybuf(dma); rootnex_teardown_windows(dma); /* * If we had to allocate space to for the worse case sgl (it didn't * fit into our pre-allocate buffer), free that up now */ if (dma->dp_need_to_free_cookie) { kmem_free(dma->dp_cookies, dma->dp_cookie_size); } /* * clean up the handle so it's ready for the next bind (i.e. if the * handle is reused). */ rootnex_clean_dmahdl(hp); if (rootnex_state->r_dvma_call_list_id) ddi_run_callback(&rootnex_state->r_dvma_call_list_id); ROOTNEX_PROF_DEC(&rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); DTRACE_PROBE1(rootnex__unbind, uint64_t, rootnex_cnt[ROOTNEX_CNT_ACTIVE_BINDS]); return (DDI_SUCCESS); } /* * rootnex_verify_buffer() * verify buffer wasn't free'd */ static int rootnex_verify_buffer(rootnex_dma_t *dma) { peekpoke_ctlops_t peek; page_t **pplist; caddr_t vaddr; uint_t pcnt; uint_t poff; page_t *pp; uint8_t b; int i; int e; /* Figure out how many pages this buffer occupies */ if (dma->dp_dma.dmao_type == DMA_OTYP_PAGES) { poff = dma->dp_dma.dmao_obj.pp_obj.pp_offset & MMU_PAGEOFFSET; } else { vaddr = dma->dp_dma.dmao_obj.virt_obj.v_addr; poff = (uintptr_t)vaddr & MMU_PAGEOFFSET; } pcnt = mmu_btopr(dma->dp_dma.dmao_size + poff); switch (dma->dp_dma.dmao_type) { case DMA_OTYP_PAGES: /* * for a linked list of pp's walk through them to make sure * they're locked and not free. */ pp = dma->dp_dma.dmao_obj.pp_obj.pp_pp; for (i = 0; i < pcnt; i++) { if (PP_ISFREE(pp) || !PAGE_LOCKED(pp)) { return (DDI_FAILURE); } pp = pp->p_next; } break; case DMA_OTYP_VADDR: case DMA_OTYP_BUFVADDR: pplist = dma->dp_dma.dmao_obj.virt_obj.v_priv; /* * for an array of pp's walk through them to make sure they're * not free. It's possible that they may not be locked. */ if (pplist) { for (i = 0; i < pcnt; i++) { if (PP_ISFREE(pplist[i])) { return (DDI_FAILURE); } } /* For a virtual address, try to peek at each page */ } else { if (dma->dp_sglinfo.si_asp == &kas) { bzero(&peek, sizeof (peekpoke_ctlops_t)); peek.host_addr = (uintptr_t)&b; peek.size = sizeof (uint8_t); peek.dev_addr = (uintptr_t)vaddr; for (i = 0; i < pcnt; i++) { e = rootnex_ctlops_peek(&peek, &b); if (e != DDI_SUCCESS) { return (DDI_FAILURE); } peek.dev_addr += MMU_PAGESIZE; } } } break; default: ASSERT(0); break; } return (DDI_SUCCESS); } /* * rootnex_clean_dmahdl() * Clean the dma handle. This should be called on a handle alloc and an * unbind handle. Set the handle state to the default settings. */ static void rootnex_clean_dmahdl(ddi_dma_impl_t *hp) { rootnex_dma_t *dma; dma = (rootnex_dma_t *)hp->dmai_private; hp->dmai_nwin = 0; dma->dp_current_cookie = 0; dma->dp_copybuf_size = 0; dma->dp_window = NULL; dma->dp_cbaddr = NULL; dma->dp_inuse = B_FALSE; dma->dp_need_to_free_cookie = B_FALSE; dma->dp_need_to_free_window = B_FALSE; dma->dp_partial_required = B_FALSE; dma->dp_trim_required = B_FALSE; dma->dp_sglinfo.si_copybuf_req = 0; #if !defined(__amd64) dma->dp_cb_remaping = B_FALSE; dma->dp_kva = NULL; #endif /* FMA related initialization */ hp->dmai_fault = 0; hp->dmai_fault_check = NULL; hp->dmai_fault_notify = NULL; hp->dmai_error.err_ena = 0; hp->dmai_error.err_status = DDI_FM_OK; hp->dmai_error.err_expected = DDI_FM_ERR_UNEXPECTED; hp->dmai_error.err_ontrap = NULL; hp->dmai_error.err_fep = NULL; } /* * rootnex_valid_alloc_parms() * Called in ddi_dma_alloc_handle path to validate its parameters. */ static int rootnex_valid_alloc_parms(ddi_dma_attr_t *attr, uint_t maxsegmentsize) { if ((attr->dma_attr_seg < MMU_PAGEOFFSET) || (attr->dma_attr_count_max < MMU_PAGEOFFSET) || (attr->dma_attr_granular > MMU_PAGESIZE) || (attr->dma_attr_maxxfer < MMU_PAGESIZE)) { return (DDI_DMA_BADATTR); } if (attr->dma_attr_addr_hi <= attr->dma_attr_addr_lo) { return (DDI_DMA_BADATTR); } if ((attr->dma_attr_seg & MMU_PAGEOFFSET) != MMU_PAGEOFFSET || MMU_PAGESIZE & (attr->dma_attr_granular - 1) || attr->dma_attr_sgllen <= 0) { return (DDI_DMA_BADATTR); } /* We should be able to DMA into every byte offset in a page */ if (maxsegmentsize < MMU_PAGESIZE) { return (DDI_DMA_BADATTR); } return (DDI_SUCCESS); } /* * rootnex_valid_bind_parms() * Called in ddi_dma_*_bind_handle path to validate its parameters. */ /* ARGSUSED */ static int rootnex_valid_bind_parms(ddi_dma_req_t *dmareq, ddi_dma_attr_t *attr) { #if !defined(__amd64) /* * we only support up to a 2G-1 transfer size on 32-bit kernels so * we can track the offset for the obsoleted interfaces. */ if (dmareq->dmar_object.dmao_size > 0x7FFFFFFF) { return (DDI_DMA_TOOBIG); } #endif return (DDI_SUCCESS); } /* * rootnex_get_sgl() * Called in bind fastpath to get the sgl. Most of this will be replaced * with a call to the vm layer when vm2.0 comes around... */ static void rootnex_get_sgl(ddi_dma_obj_t *dmar_object, ddi_dma_cookie_t *sgl, rootnex_sglinfo_t *sglinfo) { ddi_dma_atyp_t buftype; uint64_t last_page; uint64_t offset; uint64_t addrhi; uint64_t addrlo; uint64_t maxseg; page_t **pplist; uint64_t paddr; uint32_t psize; uint32_t size; caddr_t vaddr; uint_t pcnt; page_t *pp; uint_t cnt; /* shortcuts */ pplist = dmar_object->dmao_obj.virt_obj.v_priv; vaddr = dmar_object->dmao_obj.virt_obj.v_addr; maxseg = sglinfo->si_max_cookie_size; buftype = dmar_object->dmao_type; addrhi = sglinfo->si_max_addr; addrlo = sglinfo->si_min_addr; size = dmar_object->dmao_size; pcnt = 0; cnt = 0; /* * if we were passed down a linked list of pages, i.e. pointer to * page_t, use this to get our physical address and buf offset. */ if (buftype == DMA_OTYP_PAGES) { pp = dmar_object->dmao_obj.pp_obj.pp_pp; ASSERT(!PP_ISFREE(pp) && PAGE_LOCKED(pp)); offset = dmar_object->dmao_obj.pp_obj.pp_offset & MMU_PAGEOFFSET; paddr = ptob64(pp->p_pagenum) + offset; psize = MIN(size, (MMU_PAGESIZE - offset)); pp = pp->p_next; sglinfo->si_asp = NULL; /* * We weren't passed down a linked list of pages, but if we were passed * down an array of pages, use this to get our physical address and buf * offset. */ } else if (pplist != NULL) { ASSERT((buftype == DMA_OTYP_VADDR) || (buftype == DMA_OTYP_BUFVADDR)); offset = (uintptr_t)vaddr & MMU_PAGEOFFSET; sglinfo->si_asp = dmar_object->dmao_obj.virt_obj.v_as; if (sglinfo->si_asp == NULL) { sglinfo->si_asp = &kas; } ASSERT(!PP_ISFREE(pplist[pcnt])); paddr = ptob64(pplist[pcnt]->p_pagenum); paddr += offset; psize = MIN(size, (MMU_PAGESIZE - offset)); pcnt++; /* * All we have is a virtual address, we'll need to call into the VM * to get the physical address. */ } else { ASSERT((buftype == DMA_OTYP_VADDR) || (buftype == DMA_OTYP_BUFVADDR)); offset = (uintptr_t)vaddr & MMU_PAGEOFFSET; sglinfo->si_asp = dmar_object->dmao_obj.virt_obj.v_as; if (sglinfo->si_asp == NULL) { sglinfo->si_asp = &kas; } paddr = ptob64(hat_getpfnum(sglinfo->si_asp->a_hat, vaddr)); paddr += offset; psize = MIN(size, (MMU_PAGESIZE - offset)); vaddr += psize; } /* * Setup the first cookie with the physical address of the page and the * size of the page (which takes into account the initial offset into * the page. */ sgl[cnt].dmac_laddress = paddr; sgl[cnt].dmac_size = psize; sgl[cnt].dmac_type = 0; /* * Save away the buffer offset into the page. We'll need this later in * the copy buffer code to help figure out the page index within the * buffer and the offset into the current page. */ sglinfo->si_buf_offset = offset; /* * If the DMA engine can't reach the physical address, increase how * much copy buffer we need. We always increase by pagesize so we don't * have to worry about converting offsets. Set a flag in the cookies * dmac_type to indicate that it uses the copy buffer. If this isn't the * last cookie, go to the next cookie (since we separate each page which * uses the copy buffer in case the copy buffer is not physically * contiguous. */ if ((paddr < addrlo) || ((paddr + psize) > addrhi)) { sglinfo->si_copybuf_req += MMU_PAGESIZE; sgl[cnt].dmac_type = ROOTNEX_USES_COPYBUF; if ((cnt + 1) < sglinfo->si_max_pages) { cnt++; sgl[cnt].dmac_laddress = 0; sgl[cnt].dmac_size = 0; sgl[cnt].dmac_type = 0; } } /* * save this page's physical address so we can figure out if the next * page is physically contiguous. Keep decrementing size until we are * done with the buffer. */ last_page = paddr & MMU_PAGEMASK; size -= psize; while (size > 0) { /* Get the size for this page (i.e. partial or full page) */ psize = MIN(size, MMU_PAGESIZE); if (buftype == DMA_OTYP_PAGES) { /* get the paddr from the page_t */ ASSERT(!PP_ISFREE(pp) && PAGE_LOCKED(pp)); paddr = ptob64(pp->p_pagenum); pp = pp->p_next; } else if (pplist != NULL) { /* index into the array of page_t's to get the paddr */ ASSERT(!PP_ISFREE(pplist[pcnt])); paddr = ptob64(pplist[pcnt]->p_pagenum); pcnt++; } else { /* call into the VM to get the paddr */ paddr = ptob64(hat_getpfnum(sglinfo->si_asp->a_hat, vaddr)); vaddr += psize; } /* check to see if this page needs the copy buffer */ if ((paddr < addrlo) || ((paddr + psize) > addrhi)) { sglinfo->si_copybuf_req += MMU_PAGESIZE; /* * if there is something in the current cookie, go to * the next one. We only want one page in a cookie which * uses the copybuf since the copybuf doesn't have to * be physically contiguous. */ if (sgl[cnt].dmac_size != 0) { cnt++; } sgl[cnt].dmac_laddress = paddr; sgl[cnt].dmac_size = psize; #if defined(__amd64) sgl[cnt].dmac_type = ROOTNEX_USES_COPYBUF; #else /* * save the buf offset for 32-bit kernel. used in the * obsoleted interfaces. */ sgl[cnt].dmac_type = ROOTNEX_USES_COPYBUF | (dmar_object->dmao_size - size); #endif /* if this isn't the last cookie, go to the next one */ if ((cnt + 1) < sglinfo->si_max_pages) { cnt++; sgl[cnt].dmac_laddress = 0; sgl[cnt].dmac_size = 0; sgl[cnt].dmac_type = 0; } /* * this page didn't need the copy buffer, if it's not physically * contiguous, or it would put us over a segment boundary, or it * puts us over the max cookie size, or the current sgl doesn't * have anything in it. */ } else if (((last_page + MMU_PAGESIZE) != paddr) || !(paddr & sglinfo->si_segmask) || ((sgl[cnt].dmac_size + psize) > maxseg) || (sgl[cnt].dmac_size == 0)) { /* * if we're not already in a new cookie, go to the next * cookie. */ if (sgl[cnt].dmac_size != 0) { cnt++; } /* save the cookie information */ sgl[cnt].dmac_laddress = paddr; sgl[cnt].dmac_size = psize; #if defined(__amd64) sgl[cnt].dmac_type = 0; #else /* * save the buf offset for 32-bit kernel. used in the * obsoleted interfaces. */ sgl[cnt].dmac_type = dmar_object->dmao_size - size; #endif /* * this page didn't need the copy buffer, it is physically * contiguous with the last page, and it's <= the max cookie * size. */ } else { sgl[cnt].dmac_size += psize; /* * if this exactly == the maximum cookie size, and * it isn't the last cookie, go to the next cookie. */ if (((sgl[cnt].dmac_size + psize) == maxseg) && ((cnt + 1) < sglinfo->si_max_pages)) { cnt++; sgl[cnt].dmac_laddress = 0; sgl[cnt].dmac_size = 0; sgl[cnt].dmac_type = 0; } } /* * save this page's physical address so we can figure out if the * next page is physically contiguous. Keep decrementing size * until we are done with the buffer. */ last_page = paddr; size -= psize; } /* we're done, save away how many cookies the sgl has */ if (sgl[cnt].dmac_size == 0) { ASSERT(cnt < sglinfo->si_max_pages); sglinfo->si_sgl_size = cnt; } else { sglinfo->si_sgl_size = cnt + 1; } } /* * rootnex_bind_slowpath() * Call in the bind path if the calling driver can't use the sgl without * modifying it. We either need to use the copy buffer and/or we will end up * with a partial bind. */ static int rootnex_bind_slowpath(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, rootnex_dma_t *dma, ddi_dma_attr_t *attr, int kmflag) { rootnex_sglinfo_t *sinfo; rootnex_window_t *window; ddi_dma_cookie_t *cookie; size_t copybuf_used; size_t dmac_size; boolean_t partial; off_t cur_offset; page_t *cur_pp; major_t mnum; int e; int i; sinfo = &dma->dp_sglinfo; copybuf_used = 0; partial = B_FALSE; /* * If we're using the copybuf, set the copybuf state in dma struct. * Needs to be first since it sets the copy buffer size. */ if (sinfo->si_copybuf_req != 0) { e = rootnex_setup_copybuf(hp, dmareq, dma, attr); if (e != DDI_SUCCESS) { return (e); } } else { dma->dp_copybuf_size = 0; } /* * Figure out if we need to do a partial mapping. If so, figure out * if we need to trim the buffers when we munge the sgl. */ if ((dma->dp_copybuf_size < sinfo->si_copybuf_req) || (dma->dp_dma.dmao_size > dma->dp_maxxfer) || (attr->dma_attr_sgllen < sinfo->si_sgl_size)) { dma->dp_partial_required = B_TRUE; if (attr->dma_attr_granular != 1) { dma->dp_trim_required = B_TRUE; } } else { dma->dp_partial_required = B_FALSE; dma->dp_trim_required = B_FALSE; } /* If we need to do a partial bind, make sure the driver supports it */ if (dma->dp_partial_required && !(dmareq->dmar_flags & DDI_DMA_PARTIAL)) { mnum = ddi_driver_major(dma->dp_dip); /* * patchable which allows us to print one warning per major * number. */ if ((rootnex_bind_warn) && ((rootnex_warn_list[mnum] & ROOTNEX_BIND_WARNING) == 0)) { rootnex_warn_list[mnum] |= ROOTNEX_BIND_WARNING; cmn_err(CE_WARN, "!%s: coding error detected, the " "driver is using ddi_dma_attr(9S) incorrectly. " "There is a small risk of data corruption in " "particular with large I/Os. The driver should be " "replaced with a corrected version for proper " "system operation. To disable this warning, add " "'set rootnex:rootnex_bind_warn=0' to " "/etc/system(4).", ddi_driver_name(dma->dp_dip)); } return (DDI_DMA_TOOBIG); } /* * we might need multiple windows, setup state to handle them. In this * code path, we will have at least one window. */ e = rootnex_setup_windows(hp, dma, attr, kmflag); if (e != DDI_SUCCESS) { rootnex_teardown_copybuf(dma); return (e); } window = &dma->dp_window[0]; cookie = &dma->dp_cookies[0]; cur_offset = 0; rootnex_init_win(hp, dma, window, cookie, cur_offset); if (dmareq->dmar_object.dmao_type == DMA_OTYP_PAGES) { cur_pp = dmareq->dmar_object.dmao_obj.pp_obj.pp_pp; } /* loop though all the cookies we got back from get_sgl() */ for (i = 0; i < sinfo->si_sgl_size; i++) { /* * If we're using the copy buffer, check this cookie and setup * its associated copy buffer state. If this cookie uses the * copy buffer, make sure we sync this window during dma_sync. */ if (dma->dp_copybuf_size > 0) { rootnex_setup_cookie(&dmareq->dmar_object, dma, cookie, cur_offset, ©buf_used, &cur_pp); if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { window->wd_dosync = B_TRUE; } } /* * save away the cookie size, since it could be modified in * the windowing code. */ dmac_size = cookie->dmac_size; /* if we went over max copybuf size */ if (dma->dp_copybuf_size && (copybuf_used > dma->dp_copybuf_size)) { partial = B_TRUE; e = rootnex_copybuf_window_boundary(hp, dma, &window, cookie, cur_offset, ©buf_used); if (e != DDI_SUCCESS) { rootnex_teardown_copybuf(dma); rootnex_teardown_windows(dma); return (e); } /* * if the coookie uses the copy buffer, make sure the * new window we just moved to is set to sync. */ if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { window->wd_dosync = B_TRUE; } DTRACE_PROBE1(rootnex__copybuf__window, dev_info_t *, dma->dp_dip); /* if the cookie cnt == max sgllen, move to the next window */ } else if (window->wd_cookie_cnt >= attr->dma_attr_sgllen) { partial = B_TRUE; ASSERT(window->wd_cookie_cnt == attr->dma_attr_sgllen); e = rootnex_sgllen_window_boundary(hp, dma, &window, cookie, attr, cur_offset); if (e != DDI_SUCCESS) { rootnex_teardown_copybuf(dma); rootnex_teardown_windows(dma); return (e); } /* * if the coookie uses the copy buffer, make sure the * new window we just moved to is set to sync. */ if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { window->wd_dosync = B_TRUE; } DTRACE_PROBE1(rootnex__sgllen__window, dev_info_t *, dma->dp_dip); /* else if we will be over maxxfer */ } else if ((window->wd_size + dmac_size) > dma->dp_maxxfer) { partial = B_TRUE; e = rootnex_maxxfer_window_boundary(hp, dma, &window, cookie); if (e != DDI_SUCCESS) { rootnex_teardown_copybuf(dma); rootnex_teardown_windows(dma); return (e); } /* * if the coookie uses the copy buffer, make sure the * new window we just moved to is set to sync. */ if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { window->wd_dosync = B_TRUE; } DTRACE_PROBE1(rootnex__maxxfer__window, dev_info_t *, dma->dp_dip); /* else this cookie fits in the current window */ } else { window->wd_cookie_cnt++; window->wd_size += dmac_size; } /* track our offset into the buffer, go to the next cookie */ ASSERT(dmac_size <= dma->dp_dma.dmao_size); ASSERT(cookie->dmac_size <= dmac_size); cur_offset += dmac_size; cookie++; } /* if we ended up with a zero sized window in the end, clean it up */ if (window->wd_size == 0) { hp->dmai_nwin--; window--; } ASSERT(window->wd_trim.tr_trim_last == B_FALSE); if (!partial) { return (DDI_DMA_MAPPED); } ASSERT(dma->dp_partial_required); return (DDI_DMA_PARTIAL_MAP); } /* * rootnex_setup_copybuf() * Called in bind slowpath. Figures out if we're going to use the copy * buffer, and if we do, sets up the basic state to handle it. */ static int rootnex_setup_copybuf(ddi_dma_impl_t *hp, struct ddi_dma_req *dmareq, rootnex_dma_t *dma, ddi_dma_attr_t *attr) { rootnex_sglinfo_t *sinfo; ddi_dma_attr_t lattr; size_t max_copybuf; int cansleep; int e; #if !defined(__amd64) int vmflag; #endif sinfo = &dma->dp_sglinfo; /* * read this first so it's consistent through the routine so we can * patch it on the fly. */ max_copybuf = rootnex_max_copybuf_size & MMU_PAGEMASK; /* We need to call into the rootnex on ddi_dma_sync() */ hp->dmai_rflags &= ~DMP_NOSYNC; /* make sure the copybuf size <= the max size */ dma->dp_copybuf_size = MIN(sinfo->si_copybuf_req, max_copybuf); ASSERT((dma->dp_copybuf_size & MMU_PAGEOFFSET) == 0); #if !defined(__amd64) /* * if we don't have kva space to copy to/from, allocate the KVA space * now. We only do this for the 32-bit kernel. We use seg kpm space for * the 64-bit kernel. */ if ((dmareq->dmar_object.dmao_type == DMA_OTYP_PAGES) || (dmareq->dmar_object.dmao_obj.virt_obj.v_as != NULL)) { /* convert the sleep flags */ if (dmareq->dmar_fp == DDI_DMA_SLEEP) { vmflag = VM_SLEEP; } else { vmflag = VM_NOSLEEP; } /* allocate Kernel VA space that we can bcopy to/from */ dma->dp_kva = vmem_alloc(heap_arena, dma->dp_copybuf_size, vmflag); if (dma->dp_kva == NULL) { return (DDI_DMA_NORESOURCES); } } #endif /* convert the sleep flags */ if (dmareq->dmar_fp == DDI_DMA_SLEEP) { cansleep = 1; } else { cansleep = 0; } /* * Allocated the actual copy buffer. This needs to fit within the DMA * engines limits, so we can't use kmem_alloc... */ lattr = *attr; lattr.dma_attr_align = MMU_PAGESIZE; e = i_ddi_mem_alloc(dma->dp_dip, &lattr, dma->dp_copybuf_size, cansleep, 0, NULL, &dma->dp_cbaddr, &dma->dp_cbsize, NULL); if (e != DDI_SUCCESS) { #if !defined(__amd64) if (dma->dp_kva != NULL) { vmem_free(heap_arena, dma->dp_kva, dma->dp_copybuf_size); } #endif return (DDI_DMA_NORESOURCES); } DTRACE_PROBE2(rootnex__alloc__copybuf, dev_info_t *, dma->dp_dip, size_t, dma->dp_copybuf_size); return (DDI_SUCCESS); } /* * rootnex_setup_windows() * Called in bind slowpath to setup the window state. We always have windows * in the slowpath. Even if the window count = 1. */ static int rootnex_setup_windows(ddi_dma_impl_t *hp, rootnex_dma_t *dma, ddi_dma_attr_t *attr, int kmflag) { rootnex_window_t *windowp; rootnex_sglinfo_t *sinfo; size_t copy_state_size; size_t win_state_size; size_t state_available; size_t space_needed; uint_t copybuf_win; uint_t maxxfer_win; size_t space_used; uint_t sglwin; sinfo = &dma->dp_sglinfo; dma->dp_current_win = 0; hp->dmai_nwin = 0; /* If we don't need to do a partial, we only have one window */ if (!dma->dp_partial_required) { dma->dp_max_win = 1; /* * we need multiple windows, need to figure out the worse case number * of windows. */ } else { /* * if we need windows because we need more copy buffer that * we allow, the worse case number of windows we could need * here would be (copybuf space required / copybuf space that * we have) plus one for remainder, and plus 2 to handle the * extra pages on the trim for the first and last pages of the * buffer (a page is the minimum window size so under the right * attr settings, you could have a window for each page). * The last page will only be hit here if the size is not a * multiple of the granularity (which theoretically shouldn't * be the case but never has been enforced, so we could have * broken things without it). */ if (sinfo->si_copybuf_req > dma->dp_copybuf_size) { ASSERT(dma->dp_copybuf_size > 0); copybuf_win = (sinfo->si_copybuf_req / dma->dp_copybuf_size) + 1 + 2; } else { copybuf_win = 0; } /* * if we need windows because we have more cookies than the H/W * can handle, the number of windows we would need here would * be (cookie count / cookies count H/W supports) plus one for * remainder, and plus 2 to handle the extra pages on the trim * (see above comment about trim) */ if (attr->dma_attr_sgllen < sinfo->si_sgl_size) { sglwin = ((sinfo->si_sgl_size / attr->dma_attr_sgllen) + 1) + 2; } else { sglwin = 0; } /* * if we need windows because we're binding more memory than the * H/W can transfer at once, the number of windows we would need * here would be (xfer count / max xfer H/W supports) plus one * for remainder, and plus 2 to handle the extra pages on the * trim (see above comment about trim) */ if (dma->dp_dma.dmao_size > dma->dp_maxxfer) { maxxfer_win = (dma->dp_dma.dmao_size / dma->dp_maxxfer) + 1 + 2; } else { maxxfer_win = 0; } dma->dp_max_win = copybuf_win + sglwin + maxxfer_win; ASSERT(dma->dp_max_win > 0); } win_state_size = dma->dp_max_win * sizeof (rootnex_window_t); /* * Get space for window and potential copy buffer state. Before we * go and allocate memory, see if we can get away with using what's * left in the pre-allocted state or the dynamically allocated sgl. */ space_used = (uintptr_t)(sinfo->si_sgl_size * sizeof (ddi_dma_cookie_t)); /* if we dynamically allocated space for the cookies */ if (dma->dp_need_to_free_cookie) { /* if we have more space in the pre-allocted buffer, use it */ ASSERT(space_used <= dma->dp_cookie_size); if ((dma->dp_cookie_size - space_used) <= rootnex_state->r_prealloc_size) { state_available = rootnex_state->r_prealloc_size; windowp = (rootnex_window_t *)dma->dp_prealloc_buffer; /* * else, we have more free space in the dynamically allocated * buffer, i.e. the buffer wasn't worse case fragmented so we * didn't need a lot of cookies. */ } else { state_available = dma->dp_cookie_size - space_used; windowp = (rootnex_window_t *) &dma->dp_cookies[sinfo->si_sgl_size]; } /* we used the pre-alloced buffer */ } else { ASSERT(space_used <= rootnex_state->r_prealloc_size); state_available = rootnex_state->r_prealloc_size - space_used; windowp = (rootnex_window_t *) &dma->dp_cookies[sinfo->si_sgl_size]; } /* * figure out how much state we need to track the copy buffer. Add an * addition 8 bytes for pointer alignemnt later. */ if (dma->dp_copybuf_size > 0) { copy_state_size = sinfo->si_max_pages * sizeof (rootnex_pgmap_t); } else { copy_state_size = 0; } /* add an additional 8 bytes for pointer alignment */ space_needed = win_state_size + copy_state_size + 0x8; /* if we have enough space already, use it */ if (state_available >= space_needed) { dma->dp_window = windowp; dma->dp_need_to_free_window = B_FALSE; /* not enough space, need to allocate more. */ } else { dma->dp_window = kmem_alloc(space_needed, kmflag); if (dma->dp_window == NULL) { return (DDI_DMA_NORESOURCES); } dma->dp_need_to_free_window = B_TRUE; dma->dp_window_size = space_needed; DTRACE_PROBE2(rootnex__bind__sp__alloc, dev_info_t *, dma->dp_dip, size_t, space_needed); } /* * we allocate copy buffer state and window state at the same time. * setup our copy buffer state pointers. Make sure it's aligned. */ if (dma->dp_copybuf_size > 0) { dma->dp_pgmap = (rootnex_pgmap_t *)(((uintptr_t) &dma->dp_window[dma->dp_max_win] + 0x7) & ~0x7); #if !defined(__amd64) /* * make sure all pm_mapped, pm_vaddr, and pm_pp are set to * false/NULL. Should be quicker to bzero vs loop and set. */ bzero(dma->dp_pgmap, copy_state_size); #endif } else { dma->dp_pgmap = NULL; } return (DDI_SUCCESS); } /* * rootnex_teardown_copybuf() * cleans up after rootnex_setup_copybuf() */ static void rootnex_teardown_copybuf(rootnex_dma_t *dma) { #if !defined(__amd64) int i; /* * if we allocated kernel heap VMEM space, go through all the pages and * map out any of the ones that we're mapped into the kernel heap VMEM * arena. Then free the VMEM space. */ if (dma->dp_kva != NULL) { for (i = 0; i < dma->dp_sglinfo.si_max_pages; i++) { if (dma->dp_pgmap[i].pm_mapped) { hat_unload(kas.a_hat, dma->dp_pgmap[i].pm_kaddr, MMU_PAGESIZE, HAT_UNLOAD); dma->dp_pgmap[i].pm_mapped = B_FALSE; } } vmem_free(heap_arena, dma->dp_kva, dma->dp_copybuf_size); } #endif /* if we allocated a copy buffer, free it */ if (dma->dp_cbaddr != NULL) { i_ddi_mem_free(dma->dp_cbaddr, 0); } } /* * rootnex_teardown_windows() * cleans up after rootnex_setup_windows() */ static void rootnex_teardown_windows(rootnex_dma_t *dma) { /* * if we had to allocate window state on the last bind (because we * didn't have enough pre-allocated space in the handle), free it. */ if (dma->dp_need_to_free_window) { kmem_free(dma->dp_window, dma->dp_window_size); } } /* * rootnex_init_win() * Called in bind slow path during creation of a new window. Initializes * window state to default values. */ /*ARGSUSED*/ static void rootnex_init_win(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t *window, ddi_dma_cookie_t *cookie, off_t cur_offset) { hp->dmai_nwin++; window->wd_dosync = B_FALSE; window->wd_offset = cur_offset; window->wd_size = 0; window->wd_first_cookie = cookie; window->wd_cookie_cnt = 0; window->wd_trim.tr_trim_first = B_FALSE; window->wd_trim.tr_trim_last = B_FALSE; window->wd_trim.tr_first_copybuf_win = B_FALSE; window->wd_trim.tr_last_copybuf_win = B_FALSE; #if !defined(__amd64) window->wd_remap_copybuf = dma->dp_cb_remaping; #endif } /* * rootnex_setup_cookie() * Called in the bind slow path when the sgl uses the copy buffer. If any of * the sgl uses the copy buffer, we need to go through each cookie, figure * out if it uses the copy buffer, and if it does, save away everything we'll * need during sync. */ static void rootnex_setup_cookie(ddi_dma_obj_t *dmar_object, rootnex_dma_t *dma, ddi_dma_cookie_t *cookie, off_t cur_offset, size_t *copybuf_used, page_t **cur_pp) { boolean_t copybuf_sz_power_2; rootnex_sglinfo_t *sinfo; uint_t pidx; uint_t pcnt; off_t poff; #if defined(__amd64) pfn_t pfn; #else page_t **pplist; #endif sinfo = &dma->dp_sglinfo; /* * Calculate the page index relative to the start of the buffer. The * index to the current page for our buffer is the offset into the * first page of the buffer plus our current offset into the buffer * itself, shifted of course... */ pidx = (sinfo->si_buf_offset + cur_offset) >> MMU_PAGESHIFT; ASSERT(pidx < sinfo->si_max_pages); /* if this cookie uses the copy buffer */ if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { /* * NOTE: we know that since this cookie uses the copy buffer, it * is <= MMU_PAGESIZE. */ /* * get the offset into the page. For the 64-bit kernel, get the * pfn which we'll use with seg kpm. */ poff = cookie->_dmu._dmac_ll & MMU_PAGEOFFSET; #if defined(__amd64) pfn = cookie->_dmu._dmac_ll >> MMU_PAGESHIFT; #endif /* figure out if the copybuf size is a power of 2 */ if (dma->dp_copybuf_size & (dma->dp_copybuf_size - 1)) { copybuf_sz_power_2 = B_FALSE; } else { copybuf_sz_power_2 = B_TRUE; } /* This page uses the copy buffer */ dma->dp_pgmap[pidx].pm_uses_copybuf = B_TRUE; /* * save the copy buffer KVA that we'll use with this page. * if we still fit within the copybuf, it's a simple add. * otherwise, we need to wrap over using & or % accordingly. */ if ((*copybuf_used + MMU_PAGESIZE) <= dma->dp_copybuf_size) { dma->dp_pgmap[pidx].pm_cbaddr = dma->dp_cbaddr + *copybuf_used; } else { if (copybuf_sz_power_2) { dma->dp_pgmap[pidx].pm_cbaddr = (caddr_t)( (uintptr_t)dma->dp_cbaddr + (*copybuf_used & (dma->dp_copybuf_size - 1))); } else { dma->dp_pgmap[pidx].pm_cbaddr = (caddr_t)( (uintptr_t)dma->dp_cbaddr + (*copybuf_used % dma->dp_copybuf_size)); } } /* * over write the cookie physical address with the address of * the physical address of the copy buffer page that we will * use. */ cookie->_dmu._dmac_ll = ptob64(hat_getpfnum(kas.a_hat, dma->dp_pgmap[pidx].pm_cbaddr)) + poff; /* if we have a kernel VA, it's easy, just save that address */ if ((dmar_object->dmao_type != DMA_OTYP_PAGES) && (sinfo->si_asp == &kas)) { /* * save away the page aligned virtual address of the * driver buffer. Offsets are handled in the sync code. */ dma->dp_pgmap[pidx].pm_kaddr = (caddr_t)(((uintptr_t) dmar_object->dmao_obj.virt_obj.v_addr + cur_offset) & MMU_PAGEMASK); #if !defined(__amd64) /* * we didn't need to, and will never need to map this * page. */ dma->dp_pgmap[pidx].pm_mapped = B_FALSE; #endif /* we don't have a kernel VA. We need one for the bcopy. */ } else { #if defined(__amd64) /* * for the 64-bit kernel, it's easy. We use seg kpm to * get a Kernel VA for the corresponding pfn. */ dma->dp_pgmap[pidx].pm_kaddr = hat_kpm_pfn2va(pfn); #else /* * for the 32-bit kernel, this is a pain. First we'll * save away the page_t or user VA for this page. This * is needed in rootnex_dma_win() when we switch to a * new window which requires us to re-map the copy * buffer. */ pplist = dmar_object->dmao_obj.virt_obj.v_priv; if (dmar_object->dmao_type == DMA_OTYP_PAGES) { dma->dp_pgmap[pidx].pm_pp = *cur_pp; dma->dp_pgmap[pidx].pm_vaddr = NULL; } else if (pplist != NULL) { dma->dp_pgmap[pidx].pm_pp = pplist[pidx]; dma->dp_pgmap[pidx].pm_vaddr = NULL; } else { dma->dp_pgmap[pidx].pm_pp = NULL; dma->dp_pgmap[pidx].pm_vaddr = (caddr_t) (((uintptr_t) dmar_object->dmao_obj.virt_obj.v_addr + cur_offset) & MMU_PAGEMASK); } /* * save away the page aligned virtual address which was * allocated from the kernel heap arena (taking into * account if we need more copy buffer than we alloced * and use multiple windows to handle this, i.e. &,%). * NOTE: there isn't and physical memory backing up this * virtual address space currently. */ if ((*copybuf_used + MMU_PAGESIZE) <= dma->dp_copybuf_size) { dma->dp_pgmap[pidx].pm_kaddr = (caddr_t) (((uintptr_t)dma->dp_kva + *copybuf_used) & MMU_PAGEMASK); } else { if (copybuf_sz_power_2) { dma->dp_pgmap[pidx].pm_kaddr = (caddr_t) (((uintptr_t)dma->dp_kva + (*copybuf_used & (dma->dp_copybuf_size - 1))) & MMU_PAGEMASK); } else { dma->dp_pgmap[pidx].pm_kaddr = (caddr_t) (((uintptr_t)dma->dp_kva + (*copybuf_used % dma->dp_copybuf_size)) & MMU_PAGEMASK); } } /* * if we haven't used up the available copy buffer yet, * map the kva to the physical page. */ if (!dma->dp_cb_remaping && ((*copybuf_used + MMU_PAGESIZE) <= dma->dp_copybuf_size)) { dma->dp_pgmap[pidx].pm_mapped = B_TRUE; if (dma->dp_pgmap[pidx].pm_pp != NULL) { i86_pp_map(dma->dp_pgmap[pidx].pm_pp, dma->dp_pgmap[pidx].pm_kaddr); } else { i86_va_map(dma->dp_pgmap[pidx].pm_vaddr, sinfo->si_asp, dma->dp_pgmap[pidx].pm_kaddr); } /* * we've used up the available copy buffer, this page * will have to be mapped during rootnex_dma_win() when * we switch to a new window which requires a re-map * the copy buffer. (32-bit kernel only) */ } else { dma->dp_pgmap[pidx].pm_mapped = B_FALSE; } #endif /* go to the next page_t */ if (dmar_object->dmao_type == DMA_OTYP_PAGES) { *cur_pp = (*cur_pp)->p_next; } } /* add to the copy buffer count */ *copybuf_used += MMU_PAGESIZE; /* * This cookie doesn't use the copy buffer. Walk through the pages this * cookie occupies to reflect this. */ } else { /* * figure out how many pages the cookie occupies. We need to * use the original page offset of the buffer and the cookies * offset in the buffer to do this. */ poff = (sinfo->si_buf_offset + cur_offset) & MMU_PAGEOFFSET; pcnt = mmu_btopr(cookie->dmac_size + poff); while (pcnt > 0) { #if !defined(__amd64) /* * the 32-bit kernel doesn't have seg kpm, so we need * to map in the driver buffer (if it didn't come down * with a kernel VA) on the fly. Since this page doesn't * use the copy buffer, it's not, or will it ever, have * to be mapped in. */ dma->dp_pgmap[pidx].pm_mapped = B_FALSE; #endif dma->dp_pgmap[pidx].pm_uses_copybuf = B_FALSE; /* * we need to update pidx and cur_pp or we'll loose * track of where we are. */ if (dmar_object->dmao_type == DMA_OTYP_PAGES) { *cur_pp = (*cur_pp)->p_next; } pidx++; pcnt--; } } } /* * rootnex_sgllen_window_boundary() * Called in the bind slow path when the next cookie causes us to exceed (in * this case == since we start at 0 and sgllen starts at 1) the maximum sgl * length supported by the DMA H/W. */ static int rootnex_sgllen_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie, ddi_dma_attr_t *attr, off_t cur_offset) { off_t new_offset; size_t trim_sz; off_t coffset; /* * if we know we'll never have to trim, it's pretty easy. Just move to * the next window and init it. We're done. */ if (!dma->dp_trim_required) { (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); (*windowp)->wd_cookie_cnt++; (*windowp)->wd_size = cookie->dmac_size; return (DDI_SUCCESS); } /* figure out how much we need to trim from the window */ ASSERT(attr->dma_attr_granular != 0); if (dma->dp_granularity_power_2) { trim_sz = (*windowp)->wd_size & (attr->dma_attr_granular - 1); } else { trim_sz = (*windowp)->wd_size % attr->dma_attr_granular; } /* The window's a whole multiple of granularity. We're done */ if (trim_sz == 0) { (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); (*windowp)->wd_cookie_cnt++; (*windowp)->wd_size = cookie->dmac_size; return (DDI_SUCCESS); } /* * The window's not a whole multiple of granularity, since we know this * is due to the sgllen, we need to go back to the last cookie and trim * that one, add the left over part of the old cookie into the new * window, and then add in the new cookie into the new window. */ /* * make sure the driver isn't making us do something bad... Trimming and * sgllen == 1 don't go together. */ if (attr->dma_attr_sgllen == 1) { return (DDI_DMA_NOMAPPING); } /* * first, setup the current window to account for the trim. Need to go * back to the last cookie for this. */ cookie--; (*windowp)->wd_trim.tr_trim_last = B_TRUE; (*windowp)->wd_trim.tr_last_cookie = cookie; (*windowp)->wd_trim.tr_last_paddr = cookie->_dmu._dmac_ll; ASSERT(cookie->dmac_size > trim_sz); (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; (*windowp)->wd_size -= trim_sz; /* save the buffer offsets for the next window */ coffset = cookie->dmac_size - trim_sz; new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; /* * set this now in case this is the first window. all other cases are * set in dma_win() */ cookie->dmac_size = (*windowp)->wd_trim.tr_last_size; /* * initialize the next window using what's left over in the previous * cookie. */ (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, new_offset); (*windowp)->wd_cookie_cnt++; (*windowp)->wd_trim.tr_trim_first = B_TRUE; (*windowp)->wd_trim.tr_first_paddr = cookie->_dmu._dmac_ll + coffset; (*windowp)->wd_trim.tr_first_size = trim_sz; if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { (*windowp)->wd_dosync = B_TRUE; } /* * now go back to the current cookie and add it to the new window. set * the new window size to the what was left over from the previous * cookie and what's in the current cookie. */ cookie++; (*windowp)->wd_cookie_cnt++; (*windowp)->wd_size = trim_sz + cookie->dmac_size; /* * trim plus the next cookie could put us over maxxfer (a cookie can be * a max size of maxxfer). Handle that case. */ if ((*windowp)->wd_size > dma->dp_maxxfer) { /* * maxxfer is already a whole multiple of granularity, and this * trim will be <= the previous trim (since a cookie can't be * larger than maxxfer). Make things simple here. */ trim_sz = (*windowp)->wd_size - dma->dp_maxxfer; (*windowp)->wd_trim.tr_trim_last = B_TRUE; (*windowp)->wd_trim.tr_last_cookie = cookie; (*windowp)->wd_trim.tr_last_paddr = cookie->_dmu._dmac_ll; (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; (*windowp)->wd_size -= trim_sz; ASSERT((*windowp)->wd_size == dma->dp_maxxfer); /* save the buffer offsets for the next window */ coffset = cookie->dmac_size - trim_sz; new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; /* setup the next window */ (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, new_offset); (*windowp)->wd_cookie_cnt++; (*windowp)->wd_trim.tr_trim_first = B_TRUE; (*windowp)->wd_trim.tr_first_paddr = cookie->_dmu._dmac_ll + coffset; (*windowp)->wd_trim.tr_first_size = trim_sz; } return (DDI_SUCCESS); } /* * rootnex_copybuf_window_boundary() * Called in bind slowpath when we get to a window boundary because we used * up all the copy buffer that we have. */ static int rootnex_copybuf_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie, off_t cur_offset, size_t *copybuf_used) { rootnex_sglinfo_t *sinfo; off_t new_offset; size_t trim_sz; off_t coffset; uint_t pidx; off_t poff; sinfo = &dma->dp_sglinfo; /* * the copy buffer should be a whole multiple of page size. We know that * this cookie is <= MMU_PAGESIZE. */ ASSERT(cookie->dmac_size <= MMU_PAGESIZE); /* * from now on, all new windows in this bind need to be re-mapped during * ddi_dma_getwin() (32-bit kernel only). i.e. we ran out out copybuf * space... */ #if !defined(__amd64) dma->dp_cb_remaping = B_TRUE; #endif /* reset copybuf used */ *copybuf_used = 0; /* * if we don't have to trim (since granularity is set to 1), go to the * next window and add the current cookie to it. We know the current * cookie uses the copy buffer since we're in this code path. */ if (!dma->dp_trim_required) { (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); /* Add this cookie to the new window */ (*windowp)->wd_cookie_cnt++; (*windowp)->wd_size += cookie->dmac_size; *copybuf_used += MMU_PAGESIZE; return (DDI_SUCCESS); } /* * *** may need to trim, figure it out. */ /* figure out how much we need to trim from the window */ if (dma->dp_granularity_power_2) { trim_sz = (*windowp)->wd_size & (hp->dmai_attr.dma_attr_granular - 1); } else { trim_sz = (*windowp)->wd_size % hp->dmai_attr.dma_attr_granular; } /* * if the window's a whole multiple of granularity, go to the next * window, init it, then add in the current cookie. We know the current * cookie uses the copy buffer since we're in this code path. */ if (trim_sz == 0) { (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, cur_offset); /* Add this cookie to the new window */ (*windowp)->wd_cookie_cnt++; (*windowp)->wd_size += cookie->dmac_size; *copybuf_used += MMU_PAGESIZE; return (DDI_SUCCESS); } /* * *** We figured it out, we definitly need to trim */ /* * make sure the driver isn't making us do something bad... * Trimming and sgllen == 1 don't go together. */ if (hp->dmai_attr.dma_attr_sgllen == 1) { return (DDI_DMA_NOMAPPING); } /* * first, setup the current window to account for the trim. Need to go * back to the last cookie for this. Some of the last cookie will be in * the current window, and some of the last cookie will be in the new * window. All of the current cookie will be in the new window. */ cookie--; (*windowp)->wd_trim.tr_trim_last = B_TRUE; (*windowp)->wd_trim.tr_last_cookie = cookie; (*windowp)->wd_trim.tr_last_paddr = cookie->_dmu._dmac_ll; ASSERT(cookie->dmac_size > trim_sz); (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; (*windowp)->wd_size -= trim_sz; /* * we're trimming the last cookie (not the current cookie). So that * last cookie may have or may not have been using the copy buffer ( * we know the cookie passed in uses the copy buffer since we're in * this code path). * * If the last cookie doesn't use the copy buffer, nothing special to * do. However, if it does uses the copy buffer, it will be both the * last page in the current window and the first page in the next * window. Since we are reusing the copy buffer (and KVA space on the * 32-bit kernel), this page will use the end of the copy buffer in the * current window, and the start of the copy buffer in the next window. * Track that info... The cookie physical address was already set to * the copy buffer physical address in setup_cookie.. */ if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { pidx = (sinfo->si_buf_offset + (*windowp)->wd_offset + (*windowp)->wd_size) >> MMU_PAGESHIFT; (*windowp)->wd_trim.tr_last_copybuf_win = B_TRUE; (*windowp)->wd_trim.tr_last_pidx = pidx; (*windowp)->wd_trim.tr_last_cbaddr = dma->dp_pgmap[pidx].pm_cbaddr; #if !defined(__amd64) (*windowp)->wd_trim.tr_last_kaddr = dma->dp_pgmap[pidx].pm_kaddr; #endif } /* save the buffer offsets for the next window */ coffset = cookie->dmac_size - trim_sz; new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; /* * set this now in case this is the first window. all other cases are * set in dma_win() */ cookie->dmac_size = (*windowp)->wd_trim.tr_last_size; /* * initialize the next window using what's left over in the previous * cookie. */ (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, new_offset); (*windowp)->wd_cookie_cnt++; (*windowp)->wd_trim.tr_trim_first = B_TRUE; (*windowp)->wd_trim.tr_first_paddr = cookie->_dmu._dmac_ll + coffset; (*windowp)->wd_trim.tr_first_size = trim_sz; /* * again, we're tracking if the last cookie uses the copy buffer. * read the comment above for more info on why we need to track * additional state. * * For the first cookie in the new window, we need reset the physical * address to DMA into to the start of the copy buffer plus any * initial page offset which may be present. */ if (cookie->dmac_type & ROOTNEX_USES_COPYBUF) { (*windowp)->wd_dosync = B_TRUE; (*windowp)->wd_trim.tr_first_copybuf_win = B_TRUE; (*windowp)->wd_trim.tr_first_pidx = pidx; (*windowp)->wd_trim.tr_first_cbaddr = dma->dp_cbaddr; poff = (*windowp)->wd_trim.tr_first_paddr & MMU_PAGEOFFSET; (*windowp)->wd_trim.tr_first_paddr = ptob64(hat_getpfnum( kas.a_hat, dma->dp_cbaddr)) + poff; #if !defined(__amd64) (*windowp)->wd_trim.tr_first_kaddr = dma->dp_kva; #endif /* account for the cookie copybuf usage in the new window */ *copybuf_used += MMU_PAGESIZE; /* * every piece of code has to have a hack, and here is this * ones :-) * * There is a complex interaction between setup_cookie and the * copybuf window boundary. The complexity had to be in either * the maxxfer window, or the copybuf window, and I chose the * copybuf code. * * So in this code path, we have taken the last cookie, * virtually broken it in half due to the trim, and it happens * to use the copybuf which further complicates life. At the * same time, we have already setup the current cookie, which * is now wrong. More background info: the current cookie uses * the copybuf, so it is only a page long max. So we need to * fix the current cookies copy buffer address, physical * address, and kva for the 32-bit kernel. We due this by * bumping them by page size (of course, we can't due this on * the physical address since the copy buffer may not be * physically contiguous). */ cookie++; dma->dp_pgmap[pidx + 1].pm_cbaddr += MMU_PAGESIZE; poff = cookie->_dmu._dmac_ll & MMU_PAGEOFFSET; cookie->_dmu._dmac_ll = ptob64(hat_getpfnum(kas.a_hat, dma->dp_pgmap[pidx + 1].pm_cbaddr)) + poff; #if !defined(__amd64) ASSERT(dma->dp_pgmap[pidx + 1].pm_mapped == B_FALSE); dma->dp_pgmap[pidx + 1].pm_kaddr += MMU_PAGESIZE; #endif } else { /* go back to the current cookie */ cookie++; } /* * add the current cookie to the new window. set the new window size to * the what was left over from the previous cookie and what's in the * current cookie. */ (*windowp)->wd_cookie_cnt++; (*windowp)->wd_size = trim_sz + cookie->dmac_size; ASSERT((*windowp)->wd_size < dma->dp_maxxfer); /* * we know that the cookie passed in always uses the copy buffer. We * wouldn't be here if it didn't. */ *copybuf_used += MMU_PAGESIZE; return (DDI_SUCCESS); } /* * rootnex_maxxfer_window_boundary() * Called in bind slowpath when we get to a window boundary because we will * go over maxxfer. */ static int rootnex_maxxfer_window_boundary(ddi_dma_impl_t *hp, rootnex_dma_t *dma, rootnex_window_t **windowp, ddi_dma_cookie_t *cookie) { size_t dmac_size; off_t new_offset; size_t trim_sz; off_t coffset; /* * calculate how much we have to trim off of the current cookie to equal * maxxfer. We don't have to account for granularity here since our * maxxfer already takes that into account. */ trim_sz = ((*windowp)->wd_size + cookie->dmac_size) - dma->dp_maxxfer; ASSERT(trim_sz <= cookie->dmac_size); ASSERT(trim_sz <= dma->dp_maxxfer); /* save cookie size since we need it later and we might change it */ dmac_size = cookie->dmac_size; /* * if we're not trimming the entire cookie, setup the current window to * account for the trim. */ if (trim_sz < cookie->dmac_size) { (*windowp)->wd_cookie_cnt++; (*windowp)->wd_trim.tr_trim_last = B_TRUE; (*windowp)->wd_trim.tr_last_cookie = cookie; (*windowp)->wd_trim.tr_last_paddr = cookie->_dmu._dmac_ll; (*windowp)->wd_trim.tr_last_size = cookie->dmac_size - trim_sz; (*windowp)->wd_size = dma->dp_maxxfer; /* * set the adjusted cookie size now in case this is the first * window. All other windows are taken care of in get win */ cookie->dmac_size = (*windowp)->wd_trim.tr_last_size; } /* * coffset is the current offset within the cookie, new_offset is the * current offset with the entire buffer. */ coffset = dmac_size - trim_sz; new_offset = (*windowp)->wd_offset + (*windowp)->wd_size; /* initialize the next window */ (*windowp)++; rootnex_init_win(hp, dma, *windowp, cookie, new_offset); (*windowp)->wd_cookie_cnt++; (*windowp)->wd_size = trim_sz; if (trim_sz < dmac_size) { (*windowp)->wd_trim.tr_trim_first = B_TRUE; (*windowp)->wd_trim.tr_first_paddr = cookie->_dmu._dmac_ll + coffset; (*windowp)->wd_trim.tr_first_size = trim_sz; } return (DDI_SUCCESS); } /* * rootnex_dma_sync() * called from ddi_dma_sync() if DMP_NOSYNC is not set in hp->dmai_rflags. * We set DMP_NOSYNC if we're not using the copy buffer. If DMP_NOSYNC * is set, ddi_dma_sync() returns immediately passing back success. */ /*ARGSUSED*/ static int rootnex_dma_sync(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, off_t off, size_t len, uint_t cache_flags) { rootnex_sglinfo_t *sinfo; rootnex_pgmap_t *cbpage; rootnex_window_t *win; ddi_dma_impl_t *hp; rootnex_dma_t *dma; caddr_t fromaddr; caddr_t toaddr; uint_t psize; off_t offset; uint_t pidx; size_t size; off_t poff; int e; hp = (ddi_dma_impl_t *)handle; dma = (rootnex_dma_t *)hp->dmai_private; sinfo = &dma->dp_sglinfo; /* * if we don't have any windows, we don't need to sync. A copybuf * will cause us to have at least one window. */ if (dma->dp_window == NULL) { return (DDI_SUCCESS); } /* This window may not need to be sync'd */ win = &dma->dp_window[dma->dp_current_win]; if (!win->wd_dosync) { return (DDI_SUCCESS); } /* handle off and len special cases */ if ((off == 0) || (rootnex_sync_ignore_params)) { offset = win->wd_offset; } else { offset = off; } if ((len == 0) || (rootnex_sync_ignore_params)) { size = win->wd_size; } else { size = len; } /* check the sync args to make sure they make a little sense */ if (rootnex_sync_check_parms) { e = rootnex_valid_sync_parms(hp, win, offset, size, cache_flags); if (e != DDI_SUCCESS) { ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_SYNC_FAIL]); return (DDI_FAILURE); } } /* * special case the first page to handle the offset into the page. The * offset to the current page for our buffer is the offset into the * first page of the buffer plus our current offset into the buffer * itself, masked of course. */ poff = (sinfo->si_buf_offset + offset) & MMU_PAGEOFFSET; psize = MIN((MMU_PAGESIZE - poff), size); /* go through all the pages that we want to sync */ while (size > 0) { /* * Calculate the page index relative to the start of the buffer. * The index to the current page for our buffer is the offset * into the first page of the buffer plus our current offset * into the buffer itself, shifted of course... */ pidx = (sinfo->si_buf_offset + offset) >> MMU_PAGESHIFT; ASSERT(pidx < sinfo->si_max_pages); /* * if this page uses the copy buffer, we need to sync it, * otherwise, go on to the next page. */ cbpage = &dma->dp_pgmap[pidx]; ASSERT((cbpage->pm_uses_copybuf == B_TRUE) || (cbpage->pm_uses_copybuf == B_FALSE)); if (cbpage->pm_uses_copybuf) { /* cbaddr and kaddr should be page aligned */ ASSERT(((uintptr_t)cbpage->pm_cbaddr & MMU_PAGEOFFSET) == 0); ASSERT(((uintptr_t)cbpage->pm_kaddr & MMU_PAGEOFFSET) == 0); /* * if we're copying for the device, we are going to * copy from the drivers buffer and to the rootnex * allocated copy buffer. */ if (cache_flags == DDI_DMA_SYNC_FORDEV) { fromaddr = cbpage->pm_kaddr + poff; toaddr = cbpage->pm_cbaddr + poff; DTRACE_PROBE2(rootnex__sync__dev, dev_info_t *, dma->dp_dip, size_t, psize); /* * if we're copying for the cpu/kernel, we are going to * copy from the rootnex allocated copy buffer to the * drivers buffer. */ } else { fromaddr = cbpage->pm_cbaddr + poff; toaddr = cbpage->pm_kaddr + poff; DTRACE_PROBE2(rootnex__sync__cpu, dev_info_t *, dma->dp_dip, size_t, psize); } bcopy(fromaddr, toaddr, psize); } /* * decrement size until we're done, update our offset into the * buffer, and get the next page size. */ size -= psize; offset += psize; psize = MIN(MMU_PAGESIZE, size); /* page offset is zero for the rest of this loop */ poff = 0; } return (DDI_SUCCESS); } /* * rootnex_valid_sync_parms() * checks the parameters passed to sync to verify they are correct. */ static int rootnex_valid_sync_parms(ddi_dma_impl_t *hp, rootnex_window_t *win, off_t offset, size_t size, uint_t cache_flags) { off_t woffset; /* * the first part of the test to make sure the offset passed in is * within the window. */ if (offset < win->wd_offset) { return (DDI_FAILURE); } /* * second and last part of the test to make sure the offset and length * passed in is within the window. */ woffset = offset - win->wd_offset; if ((woffset + size) > win->wd_size) { return (DDI_FAILURE); } /* * if we are sync'ing for the device, the DDI_DMA_WRITE flag should * be set too. */ if ((cache_flags == DDI_DMA_SYNC_FORDEV) && (hp->dmai_rflags & DDI_DMA_WRITE)) { return (DDI_SUCCESS); } /* * at this point, either DDI_DMA_SYNC_FORCPU or DDI_DMA_SYNC_FORKERNEL * should be set. Also DDI_DMA_READ should be set in the flags. */ if (((cache_flags == DDI_DMA_SYNC_FORCPU) || (cache_flags == DDI_DMA_SYNC_FORKERNEL)) && (hp->dmai_rflags & DDI_DMA_READ)) { return (DDI_SUCCESS); } return (DDI_FAILURE); } /* * rootnex_dma_win() * called from ddi_dma_getwin() */ /*ARGSUSED*/ static int rootnex_dma_win(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, uint_t win, off_t *offp, size_t *lenp, ddi_dma_cookie_t *cookiep, uint_t *ccountp) { rootnex_window_t *window; rootnex_trim_t *trim; ddi_dma_impl_t *hp; rootnex_dma_t *dma; #if !defined(__amd64) rootnex_sglinfo_t *sinfo; rootnex_pgmap_t *pmap; uint_t pidx; uint_t pcnt; off_t poff; int i; #endif hp = (ddi_dma_impl_t *)handle; dma = (rootnex_dma_t *)hp->dmai_private; #if !defined(__amd64) sinfo = &dma->dp_sglinfo; #endif /* If we try and get a window which doesn't exist, return failure */ if (win >= hp->dmai_nwin) { ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_GETWIN_FAIL]); return (DDI_FAILURE); } /* * if we don't have any windows, and they're asking for the first * window, setup the cookie pointer to the first cookie in the bind. * setup our return values, then increment the cookie since we return * the first cookie on the stack. */ if (dma->dp_window == NULL) { if (win != 0) { ROOTNEX_PROF_INC(&rootnex_cnt[ROOTNEX_CNT_GETWIN_FAIL]); return (DDI_FAILURE); } hp->dmai_cookie = dma->dp_cookies; *offp = 0; *lenp = dma->dp_dma.dmao_size; *ccountp = dma->dp_sglinfo.si_sgl_size; *cookiep = hp->dmai_cookie[0]; hp->dmai_cookie++; return (DDI_SUCCESS); } /* sync the old window before moving on to the new one */ window = &dma->dp_window[dma->dp_current_win]; if ((window->wd_dosync) && (hp->dmai_rflags & DDI_DMA_READ)) { (void) rootnex_dma_sync(dip, rdip, handle, 0, 0, DDI_DMA_SYNC_FORCPU); } #if !defined(__amd64) /* * before we move to the next window, if we need to re-map, unmap all * the pages in this window. */ if (dma->dp_cb_remaping) { /* * If we switch to this window again, we'll need to map in * on the fly next time. */ window->wd_remap_copybuf = B_TRUE; /* * calculate the page index into the buffer where this window * starts, and the number of pages this window takes up. */ pidx = (sinfo->si_buf_offset + window->wd_offset) >> MMU_PAGESHIFT; poff = (sinfo->si_buf_offset + window->wd_offset) & MMU_PAGEOFFSET; pcnt = mmu_btopr(window->wd_size + poff); ASSERT((pidx + pcnt) <= sinfo->si_max_pages); /* unmap pages which are currently mapped in this window */ for (i = 0; i < pcnt; i++) { if (dma->dp_pgmap[pidx].pm_mapped) { hat_unload(kas.a_hat, dma->dp_pgmap[pidx].pm_kaddr, MMU_PAGESIZE, HAT_UNLOAD); dma->dp_pgmap[pidx].pm_mapped = B_FALSE; } pidx++; } } #endif /* * Move to the new window. * NOTE: current_win must be set for sync to work right */ dma->dp_current_win = win; window = &dma->dp_window[win]; /* if needed, adjust the first and/or last cookies for trim */ trim = &window->wd_trim; if (trim->tr_trim_first) { window->wd_first_cookie->_dmu._dmac_ll = trim->tr_first_paddr; window->wd_first_cookie->dmac_size = trim->tr_first_size; #if !defined(__amd64) window->wd_first_cookie->dmac_type = (window->wd_first_cookie->dmac_type & ROOTNEX_USES_COPYBUF) + window->wd_offset; #endif if (trim->tr_first_copybuf_win) { dma->dp_pgmap[trim->tr_first_pidx].pm_cbaddr = trim->tr_first_cbaddr; #if !defined(__amd64) dma->dp_pgmap[trim->tr_first_pidx].pm_kaddr = trim->tr_first_kaddr; #endif } } if (trim->tr_trim_last) { trim->tr_last_cookie->_dmu._dmac_ll = trim->tr_last_paddr; trim->tr_last_cookie->dmac_size = trim->tr_last_size; if (trim->tr_last_copybuf_win) { dma->dp_pgmap[trim->tr_last_pidx].pm_cbaddr = trim->tr_last_cbaddr; #if !defined(__amd64) dma->dp_pgmap[trim->tr_last_pidx].pm_kaddr = trim->tr_last_kaddr; #endif } } /* * setup the cookie pointer to the first cookie in the window. setup * our return values, then increment the cookie since we return the * first cookie on the stack. */ hp->dmai_cookie = window->wd_first_cookie; *offp = window->wd_offset; *lenp = window->wd_size; *ccountp = window->wd_cookie_cnt; *cookiep = hp->dmai_cookie[0]; hp->dmai_cookie++; #if !defined(__amd64) /* re-map copybuf if required for this window */ if (dma->dp_cb_remaping) { /* * calculate the page index into the buffer where this * window starts. */ pidx = (sinfo->si_buf_offset + window->wd_offset) >> MMU_PAGESHIFT; ASSERT(pidx < sinfo->si_max_pages); /* * the first page can get unmapped if it's shared with the * previous window. Even if the rest of this window is already * mapped in, we need to still check this one. */ pmap = &dma->dp_pgmap[pidx]; if ((pmap->pm_uses_copybuf) && (pmap->pm_mapped == B_FALSE)) { if (pmap->pm_pp != NULL) { pmap->pm_mapped = B_TRUE; i86_pp_map(pmap->pm_pp, pmap->pm_kaddr); } else if (pmap->pm_vaddr != NULL) { pmap->pm_mapped = B_TRUE; i86_va_map(pmap->pm_vaddr, sinfo->si_asp, pmap->pm_kaddr); } } pidx++; /* map in the rest of the pages if required */ if (window->wd_remap_copybuf) { window->wd_remap_copybuf = B_FALSE; /* figure out many pages this window takes up */ poff = (sinfo->si_buf_offset + window->wd_offset) & MMU_PAGEOFFSET; pcnt = mmu_btopr(window->wd_size + poff); ASSERT(((pidx - 1) + pcnt) <= sinfo->si_max_pages); /* map pages which require it */ for (i = 1; i < pcnt; i++) { pmap = &dma->dp_pgmap[pidx]; if (pmap->pm_uses_copybuf) { ASSERT(pmap->pm_mapped == B_FALSE); if (pmap->pm_pp != NULL) { pmap->pm_mapped = B_TRUE; i86_pp_map(pmap->pm_pp, pmap->pm_kaddr); } else if (pmap->pm_vaddr != NULL) { pmap->pm_mapped = B_TRUE; i86_va_map(pmap->pm_vaddr, sinfo->si_asp, pmap->pm_kaddr); } } pidx++; } } } #endif /* if the new window uses the copy buffer, sync it for the device */ if ((window->wd_dosync) && (hp->dmai_rflags & DDI_DMA_WRITE)) { (void) rootnex_dma_sync(dip, rdip, handle, 0, 0, DDI_DMA_SYNC_FORDEV); } return (DDI_SUCCESS); } /* * ************************ * obsoleted dma routines * ************************ */ /* * rootnex_dma_map() * called from ddi_dma_setup() */ /* ARGSUSED */ static int rootnex_dma_map(dev_info_t *dip, dev_info_t *rdip, struct ddi_dma_req *dmareq, ddi_dma_handle_t *handlep) { #if defined(__amd64) /* * this interface is not supported in 64-bit x86 kernel. See comment in * rootnex_dma_mctl() */ return (DDI_DMA_NORESOURCES); #else /* 32-bit x86 kernel */ ddi_dma_handle_t *lhandlep; ddi_dma_handle_t lhandle; ddi_dma_cookie_t cookie; ddi_dma_attr_t dma_attr; ddi_dma_lim_t *dma_lim; uint_t ccnt; int e; /* * if the driver is just testing to see if it's possible to do the bind, * we'll use local state. Otherwise, use the handle pointer passed in. */ if (handlep == NULL) { lhandlep = &lhandle; } else { lhandlep = handlep; } /* convert the limit structure to a dma_attr one */ dma_lim = dmareq->dmar_limits; dma_attr.dma_attr_version = DMA_ATTR_V0; dma_attr.dma_attr_addr_lo = dma_lim->dlim_addr_lo; dma_attr.dma_attr_addr_hi = dma_lim->dlim_addr_hi; dma_attr.dma_attr_minxfer = dma_lim->dlim_minxfer; dma_attr.dma_attr_seg = dma_lim->dlim_adreg_max; dma_attr.dma_attr_count_max = dma_lim->dlim_ctreg_max; dma_attr.dma_attr_granular = dma_lim->dlim_granular; dma_attr.dma_attr_sgllen = dma_lim->dlim_sgllen; dma_attr.dma_attr_maxxfer = dma_lim->dlim_reqsize; dma_attr.dma_attr_burstsizes = dma_lim->dlim_burstsizes; dma_attr.dma_attr_align = MMU_PAGESIZE; dma_attr.dma_attr_flags = 0; e = rootnex_dma_allochdl(dip, rdip, &dma_attr, dmareq->dmar_fp, dmareq->dmar_arg, lhandlep); if (e != DDI_SUCCESS) { return (e); } e = rootnex_dma_bindhdl(dip, rdip, *lhandlep, dmareq, &cookie, &ccnt); if ((e != DDI_DMA_MAPPED) && (e != DDI_DMA_PARTIAL_MAP)) { (void) rootnex_dma_freehdl(dip, rdip, *lhandlep); return (e); } /* * if the driver is just testing to see if it's possible to do the bind, * free up the local state and return the result. */ if (handlep == NULL) { (void) rootnex_dma_unbindhdl(dip, rdip, *lhandlep); (void) rootnex_dma_freehdl(dip, rdip, *lhandlep); if (e == DDI_DMA_MAPPED) { return (DDI_DMA_MAPOK); } else { return (DDI_DMA_NOMAPPING); } } return (e); #endif /* defined(__amd64) */ } /* * rootnex_dma_mctl() * */ /* ARGSUSED */ static int rootnex_dma_mctl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_handle_t handle, enum ddi_dma_ctlops request, off_t *offp, size_t *lenp, caddr_t *objpp, uint_t cache_flags) { #if defined(__amd64) /* * DDI_DMA_SMEM_ALLOC & DDI_DMA_IOPB_ALLOC we're changed to have a * common implementation in genunix, so they no longer have x86 * specific functionality which called into dma_ctl. * * The rest of the obsoleted interfaces were never supported in the * 64-bit x86 kernel. For s10, the obsoleted DDI_DMA_SEGTOC interface * was not ported to the x86 64-bit kernel do to serious x86 rootnex * implementation issues. * * If you can't use DDI_DMA_SEGTOC; DDI_DMA_NEXTSEG, DDI_DMA_FREE, and * DDI_DMA_NEXTWIN are useless since you can get to the cookie, so we * reflect that now too... * * Even though we fixed the pointer problem in DDI_DMA_SEGTOC, we are * not going to put this functionality into the 64-bit x86 kernel now. * It wasn't ported to the 64-bit kernel for s10, no reason to change * that in a future release. */ return (DDI_FAILURE); #else /* 32-bit x86 kernel */ ddi_dma_cookie_t lcookie; ddi_dma_cookie_t *cookie; rootnex_window_t *window; ddi_dma_impl_t *hp; rootnex_dma_t *dma; uint_t nwin; uint_t ccnt; size_t len; off_t off; int e; /* * DDI_DMA_SEGTOC, DDI_DMA_NEXTSEG, and DDI_DMA_NEXTWIN are a little * hacky since were optimizing for the current interfaces and so we can * cleanup the mess in genunix. Hopefully we will remove the this * obsoleted routines someday soon. */ switch (request) { case DDI_DMA_SEGTOC: /* ddi_dma_segtocookie() */ hp = (ddi_dma_impl_t *)handle; cookie = (ddi_dma_cookie_t *)objpp; /* * convert segment to cookie. We don't distinguish between the * two :-) */ *cookie = *hp->dmai_cookie; *lenp = cookie->dmac_size; *offp = cookie->dmac_type & ~ROOTNEX_USES_COPYBUF; return (DDI_SUCCESS); case DDI_DMA_NEXTSEG: /* ddi_dma_nextseg() */ hp = (ddi_dma_impl_t *)handle; dma = (rootnex_dma_t *)hp->dmai_private; if ((*lenp != NULL) && ((uintptr_t)*lenp != (uintptr_t)hp)) { return (DDI_DMA_STALE); } /* handle the case where we don't have any windows */ if (dma->dp_window == NULL) { /* * if seg == NULL, and we don't have any windows, * return the first cookie in the sgl. */ if (*lenp == NULL) { dma->dp_current_cookie = 0; hp->dmai_cookie = dma->dp_cookies; *objpp = (caddr_t)handle; return (DDI_SUCCESS); /* if we have more cookies, go to the next cookie */ } else { if ((dma->dp_current_cookie + 1) >= dma->dp_sglinfo.si_sgl_size) { return (DDI_DMA_DONE); } dma->dp_current_cookie++; hp->dmai_cookie++; return (DDI_SUCCESS); } } /* We have one or more windows */ window = &dma->dp_window[dma->dp_current_win]; /* * if seg == NULL, return the first cookie in the current * window */ if (*lenp == NULL) { dma->dp_current_cookie = 0; hp->dmai_cookie = window->wd_first_cookie; /* * go to the next cookie in the window then see if we done with * this window. */ } else { if ((dma->dp_current_cookie + 1) >= window->wd_cookie_cnt) { return (DDI_DMA_DONE); } dma->dp_current_cookie++; hp->dmai_cookie++; } *objpp = (caddr_t)handle; return (DDI_SUCCESS); case DDI_DMA_NEXTWIN: /* ddi_dma_nextwin() */ hp = (ddi_dma_impl_t *)handle; dma = (rootnex_dma_t *)hp->dmai_private; if ((*offp != NULL) && ((uintptr_t)*offp != (uintptr_t)hp)) { return (DDI_DMA_STALE); } /* if win == NULL, return the first window in the bind */ if (*offp == NULL) { nwin = 0; /* * else, go to the next window then see if we're done with all * the windows. */ } else { nwin = dma->dp_current_win + 1; if (nwin >= hp->dmai_nwin) { return (DDI_DMA_DONE); } } /* switch to the next window */ e = rootnex_dma_win(dip, rdip, handle, nwin, &off, &len, &lcookie, &ccnt); ASSERT(e == DDI_SUCCESS); if (e != DDI_SUCCESS) { return (DDI_DMA_STALE); } /* reset the cookie back to the first cookie in the window */ if (dma->dp_window != NULL) { window = &dma->dp_window[dma->dp_current_win]; hp->dmai_cookie = window->wd_first_cookie; } else { hp->dmai_cookie = dma->dp_cookies; } *objpp = (caddr_t)handle; return (DDI_SUCCESS); case DDI_DMA_FREE: /* ddi_dma_free() */ (void) rootnex_dma_unbindhdl(dip, rdip, handle); (void) rootnex_dma_freehdl(dip, rdip, handle); if (rootnex_state->r_dvma_call_list_id) { ddi_run_callback(&rootnex_state->r_dvma_call_list_id); } return (DDI_SUCCESS); case DDI_DMA_IOPB_ALLOC: /* get contiguous DMA-able memory */ case DDI_DMA_SMEM_ALLOC: /* get contiguous DMA-able memory */ /* should never get here, handled in genunix */ ASSERT(0); return (DDI_FAILURE); case DDI_DMA_KVADDR: case DDI_DMA_GETERR: case DDI_DMA_COFF: return (DDI_FAILURE); } return (DDI_FAILURE); #endif /* defined(__amd64) */ }