/* $NetBSD: glxsb.c,v 1.9 2009/05/16 16:52:03 cegger Exp $ */ /* $OpenBSD: glxsb.c,v 1.7 2007/02/12 14:31:45 tom Exp $ */ /* * Copyright (c) 2006 Tom Cosgrove * Copyright (c) 2003, 2004 Theo de Raadt * Copyright (c) 2003 Jason Wright * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * Driver for the security block on the AMD Geode LX processors * http://www.amd.com/files/connectivitysolutions/geode/geode_lx/33234d_lx_ds.pdf */ #include __KERNEL_RCSID(0, "$NetBSD: glxsb.c,v 1.9 2009/05/16 16:52:03 cegger Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define SB_GLD_MSR_CAP 0x58002000 /* RO - Capabilities */ #define SB_GLD_MSR_CONFIG 0x58002001 /* RW - Master Config */ #define SB_GLD_MSR_SMI 0x58002002 /* RW - SMI */ #define SB_GLD_MSR_ERROR 0x58002003 /* RW - Error */ #define SB_GLD_MSR_PM 0x58002004 /* RW - Power Mgmt */ #define SB_GLD_MSR_DIAG 0x58002005 /* RW - Diagnostic */ #define SB_GLD_MSR_CTRL 0x58002006 /* RW - Security Block Cntrl */ /* For GLD_MSR_CTRL: */ #define SB_GMC_DIV0 0x0000 /* AES update divisor values */ #define SB_GMC_DIV1 0x0001 #define SB_GMC_DIV2 0x0002 #define SB_GMC_DIV3 0x0003 #define SB_GMC_DIV_MASK 0x0003 #define SB_GMC_SBI 0x0004 /* AES swap bits */ #define SB_GMC_SBY 0x0008 /* AES swap bytes */ #define SB_GMC_TW 0x0010 /* Time write (EEPROM) */ #define SB_GMC_T_SEL0 0x0000 /* RNG post-proc: none */ #define SB_GMC_T_SEL1 0x0100 /* RNG post-proc: LFSR */ #define SB_GMC_T_SEL2 0x0200 /* RNG post-proc: whitener */ #define SB_GMC_T_SEL3 0x0300 /* RNG LFSR+whitener */ #define SB_GMC_T_SEL_MASK 0x0300 #define SB_GMC_T_NE 0x0400 /* Noise (generator) Enable */ #define SB_GMC_T_TM 0x0800 /* RNG test mode */ /* (deterministic) */ /* Security Block configuration/control registers (offsets from base) */ #define SB_CTL_A 0x0000 /* RW - SB Control A */ #define SB_CTL_B 0x0004 /* RW - SB Control B */ #define SB_AES_INT 0x0008 /* RW - SB AES Interrupt */ #define SB_SOURCE_A 0x0010 /* RW - Source A */ #define SB_DEST_A 0x0014 /* RW - Destination A */ #define SB_LENGTH_A 0x0018 /* RW - Length A */ #define SB_SOURCE_B 0x0020 /* RW - Source B */ #define SB_DEST_B 0x0024 /* RW - Destination B */ #define SB_LENGTH_B 0x0028 /* RW - Length B */ #define SB_WKEY 0x0030 /* WO - Writable Key 0-3 */ #define SB_WKEY_0 0x0030 /* WO - Writable Key 0 */ #define SB_WKEY_1 0x0034 /* WO - Writable Key 1 */ #define SB_WKEY_2 0x0038 /* WO - Writable Key 2 */ #define SB_WKEY_3 0x003C /* WO - Writable Key 3 */ #define SB_CBC_IV 0x0040 /* RW - CBC IV 0-3 */ #define SB_CBC_IV_0 0x0040 /* RW - CBC IV 0 */ #define SB_CBC_IV_1 0x0044 /* RW - CBC IV 1 */ #define SB_CBC_IV_2 0x0048 /* RW - CBC IV 2 */ #define SB_CBC_IV_3 0x004C /* RW - CBC IV 3 */ #define SB_RANDOM_NUM 0x0050 /* RW - Random Number */ #define SB_RANDOM_NUM_STATUS 0x0054 /* RW - Random Number Status */ #define SB_EEPROM_COMM 0x0800 /* RW - EEPROM Command */ #define SB_EEPROM_ADDR 0x0804 /* RW - EEPROM Address */ #define SB_EEPROM_DATA 0x0808 /* RW - EEPROM Data */ #define SB_EEPROM_SEC_STATE 0x080C /* RW - EEPROM Security State */ /* For SB_CTL_A and _B */ #define SB_CTL_ST 0x0001 /* Start operation (enc/dec) */ #define SB_CTL_ENC 0x0002 /* Encrypt (0 is decrypt) */ #define SB_CTL_DEC 0x0000 /* Decrypt */ #define SB_CTL_WK 0x0004 /* Use writable key (we set) */ #define SB_CTL_DC 0x0008 /* Destination coherent */ #define SB_CTL_SC 0x0010 /* Source coherent */ #define SB_CTL_CBC 0x0020 /* CBC (0 is ECB) */ /* For SB_AES_INT */ #define SB_AI_DISABLE_AES_A 0x0001 /* Disable AES A compl int */ #define SB_AI_ENABLE_AES_A 0x0000 /* Enable AES A compl int */ #define SB_AI_DISABLE_AES_B 0x0002 /* Disable AES B compl int */ #define SB_AI_ENABLE_AES_B 0x0000 /* Enable AES B compl int */ #define SB_AI_DISABLE_EEPROM 0x0004 /* Disable EEPROM op comp int */ #define SB_AI_ENABLE_EEPROM 0x0000 /* Enable EEPROM op compl int */ #define SB_AI_AES_A_COMPLETE 0x0100 /* AES A operation complete */ #define SB_AI_AES_B_COMPLETE 0x0200 /* AES B operation complete */ #define SB_AI_EEPROM_COMPLETE 0x0400 /* EEPROM operation complete */ #define SB_RNS_TRNG_VALID 0x0001 /* in SB_RANDOM_NUM_STATUS */ #define SB_MEM_SIZE 0x0810 /* Size of memory block */ #define SB_AES_ALIGN 0x0010 /* Source and dest buffers */ /* must be 16-byte aligned */ #define SB_AES_BLOCK_SIZE 0x0010 /* * The Geode LX security block AES acceleration doesn't perform scatter- * gather: it just takes source and destination addresses. Therefore the * plain- and ciphertexts need to be contiguous. To this end, we allocate * a buffer for both, and accept the overhead of copying in and out. If * the number of bytes in one operation is bigger than allowed for by the * buffer (buffer is twice the size of the max length, as it has both input * and output) then we have to perform multiple encryptions/decryptions. */ #define GLXSB_MAX_AES_LEN 16384 struct glxsb_dma_map { bus_dmamap_t dma_map; bus_dma_segment_t dma_seg; int dma_nsegs; int dma_size; void * dma_vaddr; uint32_t dma_paddr; }; struct glxsb_session { uint32_t ses_key[4]; uint8_t ses_iv[SB_AES_BLOCK_SIZE]; int ses_klen; int ses_used; }; struct glxsb_softc { device_t sc_dev; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; struct callout sc_co; bus_dma_tag_t sc_dmat; struct glxsb_dma_map sc_dma; int32_t sc_cid; int sc_nsessions; struct glxsb_session *sc_sessions; rndsource_element_t sc_rnd_source; }; int glxsb_match(device_t, cfdata_t, void *); void glxsb_attach(device_t, device_t, void *); void glxsb_rnd(void *); CFATTACH_DECL_NEW(glxsb, sizeof(struct glxsb_softc), glxsb_match, glxsb_attach, NULL, NULL); #define GLXSB_SESSION(sid) ((sid) & 0x0fffffff) #define GLXSB_SID(crd,ses) (((crd) << 28) | ((ses) & 0x0fffffff)) int glxsb_crypto_setup(struct glxsb_softc *); int glxsb_crypto_newsession(void *, uint32_t *, struct cryptoini *); int glxsb_crypto_process(void *, struct cryptop *, int); int glxsb_crypto_freesession(void *, uint64_t); static __inline void glxsb_aes(struct glxsb_softc *, uint32_t, uint32_t, uint32_t, void *, int, void *); int glxsb_dma_alloc(struct glxsb_softc *, int, struct glxsb_dma_map *); void glxsb_dma_pre_op(struct glxsb_softc *, struct glxsb_dma_map *); void glxsb_dma_post_op(struct glxsb_softc *, struct glxsb_dma_map *); void glxsb_dma_free(struct glxsb_softc *, struct glxsb_dma_map *); int glxsb_match(device_t parent, cfdata_t match, void *aux) { struct pci_attach_args *pa = aux; if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_GEODELX_AES) return (1); return (0); } void glxsb_attach(device_t parent, device_t self, void *aux) { struct glxsb_softc *sc = device_private(self); struct pci_attach_args *pa = aux; bus_addr_t membase; bus_size_t memsize; uint64_t msr; uint32_t intr; msr = rdmsr(SB_GLD_MSR_CAP); if ((msr & 0xFFFF00) != 0x130400) { printf(": unknown ID 0x%x\n", (int) ((msr & 0xFFFF00) >> 16)); return; } /* printf(": revision %d", (int) (msr & 0xFF)); */ /* Map in the security block configuration/control registers */ if (pci_mapreg_map(pa, PCI_MAPREG_START, PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT, 0, &sc->sc_iot, &sc->sc_ioh, &membase, &memsize)) { printf(": can't find mem space\n"); return; } sc->sc_dev = self; /* * Configure the Security Block. * * We want to enable the noise generator (T_NE), and enable the * linear feedback shift register and whitener post-processing * (T_SEL = 3). Also ensure that test mode (deterministic values) * is disabled. */ msr = rdmsr(SB_GLD_MSR_CTRL); msr &= ~(SB_GMC_T_TM | SB_GMC_T_SEL_MASK); msr |= SB_GMC_T_NE | SB_GMC_T_SEL3; #if 0 msr |= SB_GMC_SBI | SB_GMC_SBY; /* for AES, if necessary */ #endif wrmsr(SB_GLD_MSR_CTRL, msr); rnd_attach_source(&sc->sc_rnd_source, device_xname(self), RND_TYPE_RNG, RND_FLAG_NO_ESTIMATE); /* Install a periodic collector for the "true" (AMD's word) RNG */ callout_init(&sc->sc_co, 0); callout_setfunc(&sc->sc_co, glxsb_rnd, sc); glxsb_rnd(sc); printf(": RNG"); /* We don't have an interrupt handler, so disable completion INTs */ intr = SB_AI_DISABLE_AES_A | SB_AI_DISABLE_AES_B | SB_AI_DISABLE_EEPROM | SB_AI_AES_A_COMPLETE | SB_AI_AES_B_COMPLETE | SB_AI_EEPROM_COMPLETE; bus_space_write_4(sc->sc_iot, sc->sc_ioh, SB_AES_INT, intr); sc->sc_dmat = pa->pa_dmat; if (glxsb_crypto_setup(sc)) printf(" AES"); printf("\n"); } void glxsb_rnd(void *v) { struct glxsb_softc *sc = v; uint32_t status, value; extern int hz; status = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SB_RANDOM_NUM_STATUS); if (status & SB_RNS_TRNG_VALID) { value = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SB_RANDOM_NUM); rnd_add_uint32(&sc->sc_rnd_source, value); } callout_schedule(&sc->sc_co, (hz > 100) ? (hz / 100) : 1); } int glxsb_crypto_setup(struct glxsb_softc *sc) { /* Allocate a contiguous DMA-able buffer to work in */ if (glxsb_dma_alloc(sc, GLXSB_MAX_AES_LEN * 2, &sc->sc_dma) != 0) return 0; sc->sc_cid = crypto_get_driverid(0); if (sc->sc_cid < 0) return 0; crypto_register(sc->sc_cid, CRYPTO_AES_CBC, 0, 0, glxsb_crypto_newsession, glxsb_crypto_freesession, glxsb_crypto_process, sc); sc->sc_nsessions = 0; return 1; } int glxsb_crypto_newsession(void *aux, uint32_t *sidp, struct cryptoini *cri) { struct glxsb_softc *sc = aux; struct glxsb_session *ses = NULL; int sesn; if (sc == NULL || sidp == NULL || cri == NULL || cri->cri_next != NULL || cri->cri_alg != CRYPTO_AES_CBC || cri->cri_klen != 128) return (EINVAL); for (sesn = 0; sesn < sc->sc_nsessions; sesn++) { if (sc->sc_sessions[sesn].ses_used == 0) { ses = &sc->sc_sessions[sesn]; break; } } if (ses == NULL) { sesn = sc->sc_nsessions; ses = malloc((sesn + 1) * sizeof(*ses), M_DEVBUF, M_NOWAIT); if (ses == NULL) return (ENOMEM); if (sesn != 0) { memcpy(ses, sc->sc_sessions, sesn * sizeof(*ses)); memset(sc->sc_sessions, 0, sesn * sizeof(*ses)); free(sc->sc_sessions, M_DEVBUF); } sc->sc_sessions = ses; ses = &sc->sc_sessions[sesn]; sc->sc_nsessions++; } memset(ses, 0, sizeof(*ses)); ses->ses_used = 1; arc4randbytes(ses->ses_iv, sizeof(ses->ses_iv)); ses->ses_klen = cri->cri_klen; /* Copy the key (Geode LX wants the primary key only) */ memcpy(ses->ses_key, cri->cri_key, sizeof(ses->ses_key)); *sidp = GLXSB_SID(0, sesn); return (0); } int glxsb_crypto_freesession(void *aux, uint64_t tid) { struct glxsb_softc *sc = aux; int sesn; uint32_t sid = ((uint32_t)tid) & 0xffffffff; if (sc == NULL) return (EINVAL); sesn = GLXSB_SESSION(sid); if (sesn >= sc->sc_nsessions) return (EINVAL); memset(&sc->sc_sessions[sesn], 0, sizeof(sc->sc_sessions[sesn])); return (0); } /* * Must be called at splnet() or higher */ static __inline void glxsb_aes(struct glxsb_softc *sc, uint32_t control, uint32_t psrc, uint32_t pdst, void *key, int len, void *iv) { uint32_t status; int i; if (len & 0xF) { printf("%s: len must be a multiple of 16 (not %d)\n", device_xname(sc->sc_dev), len); return; } /* Set the source */ bus_space_write_4(sc->sc_iot, sc->sc_ioh, SB_SOURCE_A, psrc); /* Set the destination address */ bus_space_write_4(sc->sc_iot, sc->sc_ioh, SB_DEST_A, pdst); /* Set the data length */ bus_space_write_4(sc->sc_iot, sc->sc_ioh, SB_LENGTH_A, len); /* Set the IV */ if (iv != NULL) { bus_space_write_region_4(sc->sc_iot, sc->sc_ioh, SB_CBC_IV, iv, 4); control |= SB_CTL_CBC; } /* Set the key */ bus_space_write_region_4(sc->sc_iot, sc->sc_ioh, SB_WKEY, key, 4); /* Ask the security block to do it */ bus_space_write_4(sc->sc_iot, sc->sc_ioh, SB_CTL_A, control | SB_CTL_WK | SB_CTL_DC | SB_CTL_SC | SB_CTL_ST); /* * Now wait until it is done. * * We do a busy wait. Obviously the number of iterations of * the loop required to perform the AES operation depends upon * the number of bytes to process. * * On a 500 MHz Geode LX we see * * length (bytes) typical max iterations * 16 12 * 64 22 * 256 59 * 1024 212 * 8192 1,537 * * Since we have a maximum size of operation defined in * GLXSB_MAX_AES_LEN, we use this constant to decide how long * to wait. Allow an order of magnitude longer than it should * really take, just in case. */ for (i = 0; i < GLXSB_MAX_AES_LEN * 10; i++) { status = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SB_CTL_A); if ((status & SB_CTL_ST) == 0) /* Done */ return; } aprint_error_dev(sc->sc_dev, "operation failed to complete\n"); } int glxsb_crypto_process(void *aux, struct cryptop *crp, int hint) { struct glxsb_softc *sc = aux; struct glxsb_session *ses; struct cryptodesc *crd; char *op_src, *op_dst; uint32_t op_psrc, op_pdst; uint8_t op_iv[SB_AES_BLOCK_SIZE], *piv; int sesn, err = 0; int len, tlen, xlen; int offset; uint32_t control; int s; s = splnet(); if (crp == NULL || crp->crp_callback == NULL) { err = EINVAL; goto out; } crd = crp->crp_desc; if (crd == NULL || crd->crd_next != NULL || crd->crd_alg != CRYPTO_AES_CBC || (crd->crd_len % SB_AES_BLOCK_SIZE) != 0) { err = EINVAL; goto out; } sesn = GLXSB_SESSION(crp->crp_sid); if (sesn >= sc->sc_nsessions) { err = EINVAL; goto out; } ses = &sc->sc_sessions[sesn]; /* How much of our buffer will we need to use? */ xlen = crd->crd_len > GLXSB_MAX_AES_LEN ? GLXSB_MAX_AES_LEN : crd->crd_len; /* * XXX Check if we can have input == output on Geode LX. * XXX In the meantime, use two separate (adjacent) buffers. */ op_src = sc->sc_dma.dma_vaddr; op_dst = (char *)sc->sc_dma.dma_vaddr + xlen; op_psrc = sc->sc_dma.dma_paddr; op_pdst = sc->sc_dma.dma_paddr + xlen; if (crd->crd_flags & CRD_F_ENCRYPT) { control = SB_CTL_ENC; if (crd->crd_flags & CRD_F_IV_EXPLICIT) memcpy(op_iv, crd->crd_iv, sizeof(op_iv)); else memcpy(op_iv, ses->ses_iv, sizeof(op_iv)); if ((crd->crd_flags & CRD_F_IV_PRESENT) == 0) { if (crp->crp_flags & CRYPTO_F_IMBUF) m_copyback((struct mbuf *)crp->crp_buf, crd->crd_inject, sizeof(op_iv), op_iv); else if (crp->crp_flags & CRYPTO_F_IOV) cuio_copyback((struct uio *)crp->crp_buf, crd->crd_inject, sizeof(op_iv), op_iv); else bcopy(op_iv, (char *)crp->crp_buf + crd->crd_inject, sizeof(op_iv)); } } else { control = SB_CTL_DEC; if (crd->crd_flags & CRD_F_IV_EXPLICIT) memcpy(op_iv, crd->crd_iv, sizeof(op_iv)); else { if (crp->crp_flags & CRYPTO_F_IMBUF) m_copydata((struct mbuf *)crp->crp_buf, crd->crd_inject, sizeof(op_iv), op_iv); else if (crp->crp_flags & CRYPTO_F_IOV) cuio_copydata((struct uio *)crp->crp_buf, crd->crd_inject, sizeof(op_iv), op_iv); else bcopy((char *)crp->crp_buf + crd->crd_inject, op_iv, sizeof(op_iv)); } } offset = 0; tlen = crd->crd_len; piv = op_iv; /* Process the data in GLXSB_MAX_AES_LEN chunks */ while (tlen > 0) { len = (tlen > GLXSB_MAX_AES_LEN) ? GLXSB_MAX_AES_LEN : tlen; if (crp->crp_flags & CRYPTO_F_IMBUF) m_copydata((struct mbuf *)crp->crp_buf, crd->crd_skip + offset, len, op_src); else if (crp->crp_flags & CRYPTO_F_IOV) cuio_copydata((struct uio *)crp->crp_buf, crd->crd_skip + offset, len, op_src); else bcopy((char *)crp->crp_buf + crd->crd_skip + offset, op_src, len); glxsb_dma_pre_op(sc, &sc->sc_dma); glxsb_aes(sc, control, op_psrc, op_pdst, ses->ses_key, len, op_iv); glxsb_dma_post_op(sc, &sc->sc_dma); if (crp->crp_flags & CRYPTO_F_IMBUF) m_copyback((struct mbuf *)crp->crp_buf, crd->crd_skip + offset, len, op_dst); else if (crp->crp_flags & CRYPTO_F_IOV) cuio_copyback((struct uio *)crp->crp_buf, crd->crd_skip + offset, len, op_dst); else memcpy((char *)crp->crp_buf + crd->crd_skip + offset, op_dst, len); offset += len; tlen -= len; if (tlen <= 0) { /* Ideally, just == 0 */ /* Finished - put the IV in session IV */ piv = ses->ses_iv; } /* * Copy out last block for use as next iteration/session IV. * * piv is set to op_iv[] before the loop starts, but is * set to ses->ses_iv if we're going to exit the loop this * time. */ if (crd->crd_flags & CRD_F_ENCRYPT) { memcpy(piv, op_dst + len - sizeof(op_iv), sizeof(op_iv)); } else { /* Decryption, only need this if another iteration */ if (tlen > 0) { memcpy(piv, op_src + len - sizeof(op_iv), sizeof(op_iv)); } } } /* All AES processing has now been done. */ memset(sc->sc_dma.dma_vaddr, 0, xlen * 2); out: crp->crp_etype = err; crypto_done(crp); splx(s); return (err); } int glxsb_dma_alloc(struct glxsb_softc *sc, int size, struct glxsb_dma_map *dma) { int rc; dma->dma_nsegs = 1; dma->dma_size = size; rc = bus_dmamap_create(sc->sc_dmat, size, dma->dma_nsegs, size, 0, BUS_DMA_NOWAIT, &dma->dma_map); if (rc != 0) { aprint_error_dev(sc->sc_dev, "couldn't create DMA map for %d bytes (%d)\n", size, rc); goto fail0; } rc = bus_dmamem_alloc(sc->sc_dmat, size, SB_AES_ALIGN, 0, &dma->dma_seg, dma->dma_nsegs, &dma->dma_nsegs, BUS_DMA_NOWAIT); if (rc != 0) { aprint_error_dev(sc->sc_dev, "couldn't allocate DMA memory of %d bytes (%d)\n", size, rc); goto fail1; } rc = bus_dmamem_map(sc->sc_dmat, &dma->dma_seg, 1, size, &dma->dma_vaddr, BUS_DMA_NOWAIT); if (rc != 0) { aprint_error_dev(sc->sc_dev, "couldn't map DMA memory for %d bytes (%d)\n", size, rc); goto fail2; } rc = bus_dmamap_load(sc->sc_dmat, dma->dma_map, dma->dma_vaddr, size, NULL, BUS_DMA_NOWAIT); if (rc != 0) { aprint_error_dev(sc->sc_dev, "couldn't load DMA memory for %d bytes (%d)\n", size, rc); goto fail3; } dma->dma_paddr = dma->dma_map->dm_segs[0].ds_addr; return 0; fail3: bus_dmamem_unmap(sc->sc_dmat, dma->dma_vaddr, size); fail2: bus_dmamem_free(sc->sc_dmat, &dma->dma_seg, dma->dma_nsegs); fail1: bus_dmamap_destroy(sc->sc_dmat, dma->dma_map); fail0: return rc; } void glxsb_dma_pre_op(struct glxsb_softc *sc, struct glxsb_dma_map *dma) { bus_dmamap_sync(sc->sc_dmat, dma->dma_map, 0, dma->dma_size, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); } void glxsb_dma_post_op(struct glxsb_softc *sc, struct glxsb_dma_map *dma) { bus_dmamap_sync(sc->sc_dmat, dma->dma_map, 0, dma->dma_size, BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); } void glxsb_dma_free(struct glxsb_softc *sc, struct glxsb_dma_map *dma) { bus_dmamap_unload(sc->sc_dmat, dma->dma_map); bus_dmamem_unmap(sc->sc_dmat, dma->dma_vaddr, dma->dma_size); bus_dmamem_free(sc->sc_dmat, &dma->dma_seg, dma->dma_nsegs); bus_dmamap_destroy(sc->sc_dmat, dma->dma_map); }