Annotation of sys/arch/alpha/pci/tsp_dma.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: tsp_dma.c,v 1.5 2006/04/04 21:20:40 brad Exp $ */
! 2: /* $NetBSD: tsp_dma.c,v 1.1 1999/06/29 06:46:47 ross Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1999 by Ross Harvey. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Ross Harvey.
! 18: * 4. The name of Ross Harvey may not be used to endorse or promote products
! 19: * derived from this software without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
! 22: * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 23: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
! 24: * ARE DISCLAIMED. IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
! 25: * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 31: * SUCH DAMAGE.
! 32: *
! 33: */
! 34:
! 35: /*-
! 36: * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
! 37: * All rights reserved.
! 38: *
! 39: * This code is derived from software contributed to The NetBSD Foundation
! 40: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 41: * NASA Ames Research Center.
! 42: *
! 43: * Redistribution and use in source and binary forms, with or without
! 44: * modification, are permitted provided that the following conditions
! 45: * are met:
! 46: * 1. Redistributions of source code must retain the above copyright
! 47: * notice, this list of conditions and the following disclaimer.
! 48: * 2. Redistributions in binary form must reproduce the above copyright
! 49: * notice, this list of conditions and the following disclaimer in the
! 50: * documentation and/or other materials provided with the distribution.
! 51: * 3. All advertising materials mentioning features or use of this software
! 52: * must display the following acknowledgement:
! 53: * This product includes software developed by the NetBSD
! 54: * Foundation, Inc. and its contributors.
! 55: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 56: * contributors may be used to endorse or promote products derived
! 57: * from this software without specific prior written permission.
! 58: *
! 59: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 60: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 61: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 62: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 63: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 64: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 65: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 66: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 67: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 68: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 69: * POSSIBILITY OF SUCH DAMAGE.
! 70: */
! 71:
! 72: #define _ALPHA_BUS_DMA_PRIVATE
! 73:
! 74: #include <sys/param.h>
! 75: #include <sys/systm.h>
! 76: #include <sys/kernel.h>
! 77: #include <sys/device.h>
! 78: #include <sys/malloc.h>
! 79:
! 80: #include <uvm/uvm_extern.h>
! 81:
! 82: #include <machine/autoconf.h>
! 83:
! 84: #include <machine/bus.h>
! 85: #include <machine/rpb.h>
! 86:
! 87: #include <dev/pci/pcireg.h>
! 88: #include <dev/pci/pcivar.h>
! 89: #include <alpha/pci/tsreg.h>
! 90: #include <alpha/pci/tsvar.h>
! 91:
! 92: #define tsp_dma() { Generate ctags(1) key. }
! 93:
! 94: #define EDIFF(a, b) (((a) | WSBA_ENA | WSBA_SG) != ((b) | WSBA_ENA | WSBA_SG))
! 95:
! 96: bus_dma_tag_t tsp_dma_get_tag(bus_dma_tag_t, alpha_bus_t);
! 97:
! 98: int tsp_bus_dmamap_load_sgmap(bus_dma_tag_t, bus_dmamap_t, void *,
! 99: bus_size_t, struct proc *, int);
! 100:
! 101: int tsp_bus_dmamap_load_mbuf_sgmap(bus_dma_tag_t, bus_dmamap_t,
! 102: struct mbuf *, int);
! 103:
! 104: int tsp_bus_dmamap_load_uio_sgmap(bus_dma_tag_t, bus_dmamap_t,
! 105: struct uio *, int);
! 106:
! 107: int tsp_bus_dmamap_load_raw_sgmap(bus_dma_tag_t, bus_dmamap_t,
! 108: bus_dma_segment_t *, int, bus_size_t, int);
! 109:
! 110: void tsp_bus_dmamap_unload_sgmap(bus_dma_tag_t, bus_dmamap_t);
! 111:
! 112: void tsp_tlb_invalidate(struct tsp_config *);
! 113:
! 114: /*
! 115: * XXX Need to figure out what this is, if any. Initialize it to
! 116: * XXX something that should be safe.
! 117: */
! 118: #define TSP_SGMAP_PFTHRESH 256
! 119:
! 120: void
! 121: tsp_dma_init(pcp)
! 122: struct tsp_config *pcp;
! 123: {
! 124: int i;
! 125: bus_dma_tag_t t;
! 126: struct ts_pchip *pccsr = pcp->pc_csr;
! 127: bus_addr_t dwbase, dwlen, sgwbase, sgwlen, tbase;
! 128: static struct map_expected {
! 129: u_int32_t base, mask, enables;
! 130: } premap[4] = {
! 131: { 0x800000, 0x700000, WSBA_ENA | WSBA_SG },
! 132: { 0x80000000 | WSBA_ENA, 0x3ff00000, WSBA_ENA },
! 133: { 0, 0 },
! 134: { 0, 0 }
! 135: };
! 136:
! 137: alpha_mb();
! 138: for(i = 0; i < 4; ++i) {
! 139: if (EDIFF(pccsr->tsp_wsba[i].tsg_r, premap[i].base) ||
! 140: EDIFF(pccsr->tsp_wsm[i].tsg_r, premap[i].mask))
! 141: printf("tsp%d: window %d: %lx/base %lx/mask %lx"
! 142: " reinitialized\n",
! 143: pcp->pc_pslot, i,
! 144: pccsr->tsp_wsba[i].tsg_r,
! 145: pccsr->tsp_wsm[i].tsg_r,
! 146: pccsr->tsp_tba[i].tsg_r);
! 147: pccsr->tsp_wsba[i].tsg_r = premap[i].base | premap[i].enables;
! 148: pccsr->tsp_wsm[i].tsg_r = premap[i].mask;
! 149: }
! 150: alpha_mb();
! 151:
! 152: /*
! 153: * Initialize the DMA tag used for direct-mapped DMA.
! 154: */
! 155: t = &pcp->pc_dmat_direct;
! 156: t->_cookie = pcp;
! 157: t->_wbase = dwbase = WSBA_ADDR(pccsr->tsp_wsba[1].tsg_r);
! 158: t->_wsize = dwlen = WSM_LEN(pccsr->tsp_wsm[1].tsg_r);
! 159: t->_next_window = &pcp->pc_dmat_sgmap;
! 160: t->_boundary = 0;
! 161: t->_sgmap = NULL;
! 162: t->_get_tag = tsp_dma_get_tag;
! 163: t->_dmamap_create = _bus_dmamap_create;
! 164: t->_dmamap_destroy = _bus_dmamap_destroy;
! 165: t->_dmamap_load = _bus_dmamap_load_direct;
! 166: t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct;
! 167: t->_dmamap_load_uio = _bus_dmamap_load_uio_direct;
! 168: t->_dmamap_load_raw = _bus_dmamap_load_raw_direct;
! 169: t->_dmamap_unload = _bus_dmamap_unload;
! 170: t->_dmamap_sync = _bus_dmamap_sync;
! 171:
! 172: t->_dmamem_alloc = _bus_dmamem_alloc;
! 173: t->_dmamem_free = _bus_dmamem_free;
! 174: t->_dmamem_map = _bus_dmamem_map;
! 175: t->_dmamem_unmap = _bus_dmamem_unmap;
! 176: t->_dmamem_mmap = _bus_dmamem_mmap;
! 177:
! 178: /*
! 179: * Initialize the DMA tag used for sgmap-mapped DMA.
! 180: */
! 181: t = &pcp->pc_dmat_sgmap;
! 182: t->_cookie = pcp;
! 183: t->_wbase = sgwbase = WSBA_ADDR(pccsr->tsp_wsba[0].tsg_r);
! 184: t->_wsize = sgwlen = WSM_LEN(pccsr->tsp_wsm[0].tsg_r);
! 185: t->_next_window = NULL;
! 186: t->_boundary = 0;
! 187: t->_sgmap = &pcp->pc_sgmap;
! 188: t->_pfthresh = TSP_SGMAP_PFTHRESH;
! 189: t->_get_tag = tsp_dma_get_tag;
! 190: t->_dmamap_create = alpha_sgmap_dmamap_create;
! 191: t->_dmamap_destroy = alpha_sgmap_dmamap_destroy;
! 192: t->_dmamap_load = tsp_bus_dmamap_load_sgmap;
! 193: t->_dmamap_load_mbuf = tsp_bus_dmamap_load_mbuf_sgmap;
! 194: t->_dmamap_load_uio = tsp_bus_dmamap_load_uio_sgmap;
! 195: t->_dmamap_load_raw = tsp_bus_dmamap_load_raw_sgmap;
! 196: t->_dmamap_unload = tsp_bus_dmamap_unload_sgmap;
! 197: t->_dmamap_sync = _bus_dmamap_sync;
! 198:
! 199: t->_dmamem_alloc = _bus_dmamem_alloc;
! 200: t->_dmamem_free = _bus_dmamem_free;
! 201: t->_dmamem_map = _bus_dmamem_map;
! 202: t->_dmamem_unmap = _bus_dmamem_unmap;
! 203: t->_dmamem_mmap = _bus_dmamem_mmap;
! 204:
! 205: /*
! 206: * Initialize the SGMAP. Align page table to 32k in case
! 207: * window is somewhat larger than expected.
! 208: */
! 209: alpha_sgmap_init(t, &pcp->pc_sgmap, "tsp_sgmap",
! 210: sgwbase, 0, sgwlen, sizeof(u_int64_t), NULL, (32*1024));
! 211:
! 212: /*
! 213: * Enable window 0 and enable SG PTE mapping.
! 214: */
! 215: alpha_mb();
! 216: pccsr->tsp_wsba[0].tsg_r |= WSBA_SG | WSBA_ENA;
! 217: alpha_mb();
! 218:
! 219: /*
! 220: * Check windows for sanity, especially if we later decide to
! 221: * use the firmware's initialization in some cases.
! 222: */
! 223: if ((sgwbase <= dwbase && dwbase < sgwbase + sgwlen) ||
! 224: (dwbase <= sgwbase && sgwbase < dwbase + dwlen))
! 225: panic("tsp_dma_init: overlap");
! 226:
! 227: tbase = pcp->pc_sgmap.aps_ptpa;
! 228: if (tbase & ~0x7fffffc00UL)
! 229: panic("tsp_dma_init: bad page table address");
! 230: alpha_mb();
! 231: pccsr->tsp_tba[0].tsg_r = tbase;
! 232: alpha_mb();
! 233:
! 234: tsp_tlb_invalidate(pcp);
! 235: alpha_mb();
! 236:
! 237: /* XXX XXX BEGIN XXX XXX */
! 238: { /* XXX */
! 239: extern paddr_t alpha_XXX_dmamap_or; /* XXX */
! 240: alpha_XXX_dmamap_or = dwbase; /* XXX */
! 241: } /* XXX */
! 242: /* XXX XXX END XXX XXX */
! 243: }
! 244:
! 245: /*
! 246: * Return the bus dma tag to be used for the specified bus type.
! 247: * INTERNAL USE ONLY!
! 248: */
! 249: bus_dma_tag_t
! 250: tsp_dma_get_tag(t, bustype)
! 251: bus_dma_tag_t t;
! 252: alpha_bus_t bustype;
! 253: {
! 254: struct tsp_config *pcp = t->_cookie;
! 255:
! 256: switch (bustype) {
! 257: case ALPHA_BUS_PCI:
! 258: case ALPHA_BUS_EISA:
! 259: /*
! 260: * The direct mapped window will work for most systems,
! 261: * most of the time. When it doesn't, we chain to the sgmap
! 262: * window automatically.
! 263: */
! 264: return (&pcp->pc_dmat_direct);
! 265:
! 266: case ALPHA_BUS_ISA:
! 267: /*
! 268: * ISA doesn't have enough address bits to use
! 269: * the direct-mapped DMA window, so we must use
! 270: * SGMAPs.
! 271: */
! 272: return (&pcp->pc_dmat_sgmap);
! 273:
! 274: default:
! 275: panic("tsp_dma_get_tag: shouldn't be here, really...");
! 276: }
! 277: }
! 278:
! 279: /*
! 280: * Load a TSP SGMAP-mapped DMA map with a linear buffer.
! 281: */
! 282: int
! 283: tsp_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
! 284: bus_dma_tag_t t;
! 285: bus_dmamap_t map;
! 286: void *buf;
! 287: bus_size_t buflen;
! 288: struct proc *p;
! 289: int flags;
! 290: {
! 291: int error;
! 292:
! 293: error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags,
! 294: t->_sgmap);
! 295: if (error == 0)
! 296: tsp_tlb_invalidate(t->_cookie);
! 297:
! 298: return (error);
! 299: }
! 300:
! 301: /*
! 302: * Load a TSP SGMAP-mapped DMA map with an mbuf chain.
! 303: */
! 304: int
! 305: tsp_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
! 306: bus_dma_tag_t t;
! 307: bus_dmamap_t map;
! 308: struct mbuf *m;
! 309: int flags;
! 310: {
! 311: int error;
! 312:
! 313: error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap);
! 314: if (error == 0)
! 315: tsp_tlb_invalidate(t->_cookie);
! 316:
! 317: return (error);
! 318: }
! 319:
! 320: /*
! 321: * Load a TSP SGMAP-mapped DMA map with a uio.
! 322: */
! 323: int
! 324: tsp_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
! 325: bus_dma_tag_t t;
! 326: bus_dmamap_t map;
! 327: struct uio *uio;
! 328: int flags;
! 329: {
! 330: int error;
! 331:
! 332: error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap);
! 333: if (error == 0)
! 334: tsp_tlb_invalidate(t->_cookie);
! 335:
! 336: return (error);
! 337: }
! 338:
! 339: /*
! 340: * Load a TSP SGMAP-mapped DMA map with raw memory.
! 341: */
! 342: int
! 343: tsp_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
! 344: bus_dma_tag_t t;
! 345: bus_dmamap_t map;
! 346: bus_dma_segment_t *segs;
! 347: int nsegs;
! 348: bus_size_t size;
! 349: int flags;
! 350: {
! 351: int error;
! 352:
! 353: error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags,
! 354: t->_sgmap);
! 355: if (error == 0)
! 356: tsp_tlb_invalidate(t->_cookie);
! 357:
! 358: return (error);
! 359: }
! 360:
! 361: /*
! 362: * Unload a TSP DMA map.
! 363: */
! 364: void
! 365: tsp_bus_dmamap_unload_sgmap(t, map)
! 366: bus_dma_tag_t t;
! 367: bus_dmamap_t map;
! 368: {
! 369:
! 370: /*
! 371: * Invalidate any SGMAP page table entries used by this
! 372: * mapping.
! 373: */
! 374: pci_sgmap_pte64_unload(t, map, t->_sgmap);
! 375: tsp_tlb_invalidate(t->_cookie);
! 376:
! 377: /*
! 378: * Do the generic bits of the unload.
! 379: */
! 380: _bus_dmamap_unload(t, map);
! 381: }
! 382:
! 383: /*
! 384: * Flush the TSP scatter/gather TLB.
! 385: */
! 386: void
! 387: tsp_tlb_invalidate(pcp)
! 388: struct tsp_config *pcp;
! 389: {
! 390:
! 391: alpha_mb();
! 392: pcp->pc_csr->tsp_tlbia.tsg_r = 0;
! 393: alpha_mb();
! 394: }
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