Annotation of sys/arch/alpha/pci/mcpcia_dma.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: mcpcia_dma.c,v 1.1 2007/03/16 21:22:27 robert Exp $ */
! 2: /* $NetBSD: mcpcia_dma.c,v 1.15 2001/07/19 18:55:40 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe and Matthew Jacob of the Numerical Aerospace Simulation
! 10: * Facility, NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: #define _ALPHA_BUS_DMA_PRIVATE
! 42:
! 43: #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
! 44: #include <sys/param.h>
! 45: #include <sys/systm.h>
! 46: #include <sys/kernel.h>
! 47: #include <sys/device.h>
! 48: #include <sys/malloc.h>
! 49:
! 50: #include <uvm/uvm_extern.h>
! 51:
! 52: #include <machine/bus.h>
! 53: #include <machine/rpb.h>
! 54:
! 55: #include <dev/pci/pcireg.h>
! 56: #include <dev/pci/pcivar.h>
! 57: #include <alpha/pci/mcpciareg.h>
! 58: #include <alpha/pci/mcpciavar.h>
! 59: #include <alpha/pci/pci_kn300.h>
! 60:
! 61: bus_dma_tag_t mcpcia_dma_get_tag (bus_dma_tag_t, alpha_bus_t);
! 62:
! 63: int mcpcia_bus_dmamap_load_sgmap (bus_dma_tag_t, bus_dmamap_t, void *,
! 64: bus_size_t, struct proc *, int);
! 65:
! 66: int mcpcia_bus_dmamap_load_mbuf_sgmap (bus_dma_tag_t, bus_dmamap_t,
! 67: struct mbuf *, int);
! 68:
! 69: int mcpcia_bus_dmamap_load_uio_sgmap (bus_dma_tag_t, bus_dmamap_t,
! 70: struct uio *, int);
! 71:
! 72: int mcpcia_bus_dmamap_load_raw_sgmap (bus_dma_tag_t, bus_dmamap_t,
! 73: bus_dma_segment_t *, int, bus_size_t, int);
! 74:
! 75: void mcpcia_bus_dmamap_unload_sgmap (bus_dma_tag_t, bus_dmamap_t);
! 76:
! 77: /*
! 78: * Direct-mapped window: 2G at 2G
! 79: */
! 80: #define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL)
! 81: #define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL)
! 82:
! 83: /*
! 84: * SGMAP window for PCI: 1G at 1G
! 85: */
! 86: #define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL)
! 87: #define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL)
! 88:
! 89: /*
! 90: * SGMAP window for ISA: 8M at 8M
! 91: */
! 92: #define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024)
! 93: #define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024)
! 94:
! 95: /* MCPCIA has a 256-byte out-bound DMA prefetch threshold. */
! 96: #define MCPCIA_SG_MAPPED_PFTHRESH 256
! 97:
! 98: #define MCPCIA_SGTLB_INVALIDATE(ccp) \
! 99: do { \
! 100: alpha_mb(); \
! 101: REGVAL(MCPCIA_SG_TBIA(ccp)) = 0xdeadbeef; \
! 102: alpha_mb(); \
! 103: } while (0)
! 104:
! 105: void
! 106: mcpcia_dma_init(ccp)
! 107: struct mcpcia_config *ccp;
! 108: {
! 109: bus_dma_tag_t t;
! 110:
! 111: /*
! 112: * Initialize the DMA tag used for direct-mapped DMA.
! 113: */
! 114: t = &ccp->cc_dmat_direct;
! 115: t->_cookie = ccp;
! 116: t->_wbase = MCPCIA_DIRECT_MAPPED_BASE;
! 117: t->_wsize = MCPCIA_DIRECT_MAPPED_SIZE;
! 118: t->_next_window = &ccp->cc_dmat_pci_sgmap;
! 119: t->_boundary = 0;
! 120: t->_sgmap = NULL;
! 121: t->_get_tag = mcpcia_dma_get_tag;
! 122: t->_dmamap_create = _bus_dmamap_create;
! 123: t->_dmamap_destroy = _bus_dmamap_destroy;
! 124: t->_dmamap_load = _bus_dmamap_load_direct;
! 125: t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct;
! 126: t->_dmamap_load_uio = _bus_dmamap_load_uio_direct;
! 127: t->_dmamap_load_raw = _bus_dmamap_load_raw_direct;
! 128: t->_dmamap_unload = _bus_dmamap_unload;
! 129: t->_dmamap_sync = _bus_dmamap_sync;
! 130:
! 131: t->_dmamem_alloc = _bus_dmamem_alloc;
! 132: t->_dmamem_free = _bus_dmamem_free;
! 133: t->_dmamem_map = _bus_dmamem_map;
! 134: t->_dmamem_unmap = _bus_dmamem_unmap;
! 135: t->_dmamem_mmap = _bus_dmamem_mmap;
! 136:
! 137: /*
! 138: * Initialize the DMA tag used for sgmap-mapped PCI DMA.
! 139: */
! 140: t = &ccp->cc_dmat_pci_sgmap;
! 141: t->_cookie = ccp;
! 142: t->_wbase = MCPCIA_PCI_SG_MAPPED_BASE;
! 143: t->_wsize = MCPCIA_PCI_SG_MAPPED_SIZE;
! 144: t->_next_window = NULL;
! 145: t->_boundary = 0;
! 146: t->_sgmap = &ccp->cc_pci_sgmap;
! 147: t->_pfthresh = MCPCIA_SG_MAPPED_PFTHRESH;
! 148: t->_get_tag = mcpcia_dma_get_tag;
! 149: t->_dmamap_create = alpha_sgmap_dmamap_create;
! 150: t->_dmamap_destroy = alpha_sgmap_dmamap_destroy;
! 151: t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap;
! 152: t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap;
! 153: t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap;
! 154: t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap;
! 155: t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap;
! 156: t->_dmamap_sync = _bus_dmamap_sync;
! 157:
! 158: t->_dmamem_alloc = _bus_dmamem_alloc;
! 159: t->_dmamem_free = _bus_dmamem_free;
! 160: t->_dmamem_map = _bus_dmamem_map;
! 161: t->_dmamem_unmap = _bus_dmamem_unmap;
! 162: t->_dmamem_mmap = _bus_dmamem_mmap;
! 163:
! 164: /*
! 165: * Initialize the DMA tag used for sgmap-mapped ISA DMA.
! 166: */
! 167: t = &ccp->cc_dmat_isa_sgmap;
! 168: t->_cookie = ccp;
! 169: t->_wbase = MCPCIA_ISA_SG_MAPPED_BASE;
! 170: t->_wsize = MCPCIA_ISA_SG_MAPPED_SIZE;
! 171: t->_next_window = NULL;
! 172: t->_boundary = 0;
! 173: t->_sgmap = &ccp->cc_isa_sgmap;
! 174: t->_pfthresh = MCPCIA_SG_MAPPED_PFTHRESH;
! 175: t->_get_tag = mcpcia_dma_get_tag;
! 176: t->_dmamap_create = alpha_sgmap_dmamap_create;
! 177: t->_dmamap_destroy = alpha_sgmap_dmamap_destroy;
! 178: t->_dmamap_load = mcpcia_bus_dmamap_load_sgmap;
! 179: t->_dmamap_load_mbuf = mcpcia_bus_dmamap_load_mbuf_sgmap;
! 180: t->_dmamap_load_uio = mcpcia_bus_dmamap_load_uio_sgmap;
! 181: t->_dmamap_load_raw = mcpcia_bus_dmamap_load_raw_sgmap;
! 182: t->_dmamap_unload = mcpcia_bus_dmamap_unload_sgmap;
! 183: t->_dmamap_sync = _bus_dmamap_sync;
! 184:
! 185: t->_dmamem_alloc = _bus_dmamem_alloc;
! 186: t->_dmamem_free = _bus_dmamem_free;
! 187: t->_dmamem_map = _bus_dmamem_map;
! 188: t->_dmamem_unmap = _bus_dmamem_unmap;
! 189: t->_dmamem_mmap = _bus_dmamem_mmap;
! 190:
! 191: /*
! 192: * Initialize the SGMAPs.
! 193: */
! 194: alpha_sgmap_init(&ccp->cc_dmat_pci_sgmap, &ccp->cc_pci_sgmap,
! 195: "mcpcia pci sgmap",
! 196: MCPCIA_PCI_SG_MAPPED_BASE, 0, MCPCIA_PCI_SG_MAPPED_SIZE,
! 197: sizeof(u_int64_t), NULL, 0);
! 198:
! 199: alpha_sgmap_init(&ccp->cc_dmat_isa_sgmap, &ccp->cc_isa_sgmap,
! 200: "mcpcia isa sgmap",
! 201: MCPCIA_ISA_SG_MAPPED_BASE, 0, MCPCIA_ISA_SG_MAPPED_SIZE,
! 202: sizeof(u_int64_t), NULL, 0);
! 203:
! 204: /*
! 205: * Disable windows first.
! 206: */
! 207: REGVAL(MCPCIA_W0_BASE(ccp)) = 0;
! 208: REGVAL(MCPCIA_W1_BASE(ccp)) = 0;
! 209: REGVAL(MCPCIA_W2_BASE(ccp)) = 0;
! 210: REGVAL(MCPCIA_W3_BASE(ccp)) = 0;
! 211: REGVAL(MCPCIA_T0_BASE(ccp)) = 0;
! 212: REGVAL(MCPCIA_T1_BASE(ccp)) = 0;
! 213: REGVAL(MCPCIA_T2_BASE(ccp)) = 0;
! 214: REGVAL(MCPCIA_T3_BASE(ccp)) = 0;
! 215: alpha_mb();
! 216:
! 217: /*
! 218: * Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB.
! 219: */
! 220: REGVAL(MCPCIA_W0_MASK(ccp)) = MCPCIA_WMASK_8M;
! 221: REGVAL(MCPCIA_T0_BASE(ccp)) =
! 222: ccp->cc_isa_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT;
! 223: alpha_mb();
! 224: REGVAL(MCPCIA_W0_BASE(ccp)) =
! 225: MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE;
! 226: alpha_mb();
! 227:
! 228: MCPCIA_SGTLB_INVALIDATE(ccp);
! 229:
! 230: /*
! 231: * Set up window 1 as a 2 GB Direct-mapped window starting at 2GB.
! 232: */
! 233: REGVAL(MCPCIA_W1_MASK(ccp)) = MCPCIA_WMASK_2G;
! 234: REGVAL(MCPCIA_T1_BASE(ccp)) = 0;
! 235: alpha_mb();
! 236: REGVAL(MCPCIA_W1_BASE(ccp)) =
! 237: MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN;
! 238: alpha_mb();
! 239:
! 240: /*
! 241: * Set up window 2 as a 1G SGMAP-mapped window starting at 1G.
! 242: */
! 243: REGVAL(MCPCIA_W2_MASK(ccp)) = MCPCIA_WMASK_1G;
! 244: REGVAL(MCPCIA_T2_BASE(ccp)) =
! 245: ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT;
! 246: alpha_mb();
! 247: REGVAL(MCPCIA_W2_BASE(ccp)) =
! 248: MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE;
! 249: alpha_mb();
! 250:
! 251: /* XXX XXX BEGIN XXX XXX */
! 252: { /* XXX */
! 253: extern paddr_t alpha_XXX_dmamap_or; /* XXX */
! 254: alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */
! 255: } /* XXX */
! 256: /* XXX XXX END XXX XXX */
! 257: }
! 258:
! 259: /*
! 260: * Return the bus dma tag to be used for the specified bus type.
! 261: * INTERNAL USE ONLY!
! 262: */
! 263: bus_dma_tag_t
! 264: mcpcia_dma_get_tag(t, bustype)
! 265: bus_dma_tag_t t;
! 266: alpha_bus_t bustype;
! 267: {
! 268: struct mcpcia_config *ccp = t->_cookie;
! 269:
! 270: switch (bustype) {
! 271: case ALPHA_BUS_PCI:
! 272: case ALPHA_BUS_EISA:
! 273: /*
! 274: * Start off using the direct-mapped window. We will
! 275: * automatically fall backed onto the chained PCI SGMAP
! 276: * window if necessary.
! 277: */
! 278: return (&ccp->cc_dmat_direct);
! 279:
! 280: case ALPHA_BUS_ISA:
! 281: /*
! 282: * ISA doesn't have enough address bits to use
! 283: * the direct-mapped DMA window, so we must use
! 284: * SGMAPs.
! 285: */
! 286: return (&ccp->cc_dmat_isa_sgmap);
! 287:
! 288: default:
! 289: panic("mcpcia_dma_get_tag: shouldn't be here, really...");
! 290: }
! 291: }
! 292:
! 293: /*
! 294: * Load a MCPCIA SGMAP-mapped DMA map with a linear buffer.
! 295: */
! 296: int
! 297: mcpcia_bus_dmamap_load_sgmap(t, map, buf, buflen, p, flags)
! 298: bus_dma_tag_t t;
! 299: bus_dmamap_t map;
! 300: void *buf;
! 301: bus_size_t buflen;
! 302: struct proc *p;
! 303: int flags;
! 304: {
! 305: int error;
! 306: struct mcpcia_config *ccp = t->_cookie;
! 307:
! 308: error = pci_sgmap_pte64_load(t, map, buf, buflen, p, flags,
! 309: t->_sgmap);
! 310: if (error == 0)
! 311: MCPCIA_SGTLB_INVALIDATE(ccp);
! 312: return (error);
! 313: }
! 314:
! 315: /*
! 316: * Load a MCPCIA SGMAP-mapped DMA map with an mbuf chain.
! 317: */
! 318: int
! 319: mcpcia_bus_dmamap_load_mbuf_sgmap(t, map, m, flags)
! 320: bus_dma_tag_t t;
! 321: bus_dmamap_t map;
! 322: struct mbuf *m;
! 323: int flags;
! 324: {
! 325: int error;
! 326: struct mcpcia_config *ccp = t->_cookie;
! 327:
! 328: error = pci_sgmap_pte64_load_mbuf(t, map, m, flags, t->_sgmap);
! 329: if (error == 0)
! 330: MCPCIA_SGTLB_INVALIDATE(ccp);
! 331: return (error);
! 332: }
! 333:
! 334: /*
! 335: * Load a MCPCIA SGMAP-mapped DMA map with a uio.
! 336: */
! 337: int
! 338: mcpcia_bus_dmamap_load_uio_sgmap(t, map, uio, flags)
! 339: bus_dma_tag_t t;
! 340: bus_dmamap_t map;
! 341: struct uio *uio;
! 342: int flags;
! 343: {
! 344: int error;
! 345: struct mcpcia_config *ccp = t->_cookie;
! 346:
! 347: error = pci_sgmap_pte64_load_uio(t, map, uio, flags, t->_sgmap);
! 348: if (error == 0)
! 349: MCPCIA_SGTLB_INVALIDATE(ccp);
! 350: return (error);
! 351: }
! 352:
! 353: /*
! 354: * Load a MCPCIA SGMAP-mapped DMA map with raw memory.
! 355: */
! 356: int
! 357: mcpcia_bus_dmamap_load_raw_sgmap(t, map, segs, nsegs, size, flags)
! 358: bus_dma_tag_t t;
! 359: bus_dmamap_t map;
! 360: bus_dma_segment_t *segs;
! 361: int nsegs;
! 362: bus_size_t size;
! 363: int flags;
! 364: {
! 365: int error;
! 366: struct mcpcia_config *ccp = t->_cookie;
! 367:
! 368: error = pci_sgmap_pte64_load_raw(t, map, segs, nsegs, size, flags,
! 369: t->_sgmap);
! 370: if (error == 0)
! 371: MCPCIA_SGTLB_INVALIDATE(ccp);
! 372: return (error);
! 373: }
! 374:
! 375: /*
! 376: * Unload a MCPCIA DMA map.
! 377: */
! 378: void
! 379: mcpcia_bus_dmamap_unload_sgmap(t, map)
! 380: bus_dma_tag_t t;
! 381: bus_dmamap_t map;
! 382: {
! 383: struct mcpcia_config *ccp = t->_cookie;
! 384:
! 385: /*
! 386: * Invalidate any SGMAP page table entries used by this mapping.
! 387: */
! 388: pci_sgmap_pte64_unload(t, map, t->_sgmap);
! 389: MCPCIA_SGTLB_INVALIDATE(ccp);
! 390:
! 391: /*
! 392: * Do the generic bits of the unload.
! 393: */
! 394: _bus_dmamap_unload(t, map);
! 395: }
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