1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org> 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/types.h> 33 #include <sys/bus.h> 34 #include <sys/malloc.h> 35 #include <sys/sysctl.h> 36 37 #include <opencrypto/xform.h> 38 39 #include "ccp.h" 40 #include "ccp_lsb.h" 41 42 void 43 ccp_queue_decode_lsb_regions(struct ccp_softc *sc, uint64_t lsbmask, 44 unsigned queue) 45 { 46 struct ccp_queue *qp; 47 unsigned i; 48 49 qp = &sc->queues[queue]; 50 51 qp->lsb_mask = 0; 52 53 for (i = 0; i < MAX_LSB_REGIONS; i++) { 54 if (((1 << queue) & lsbmask) != 0) 55 qp->lsb_mask |= (1 << i); 56 lsbmask >>= MAX_HW_QUEUES; 57 } 58 59 /* 60 * Ignore region 0, which has special entries that cannot be used 61 * generally. 62 */ 63 qp->lsb_mask &= ~(1 << 0); 64 } 65 66 /* 67 * Look for a private LSB for each queue. There are 7 general purpose LSBs 68 * total and 5 queues. PSP will reserve some of both. Firmware limits some 69 * queues' access to some LSBs; we hope it is fairly sane and just use a dumb 70 * greedy algorithm to assign LSBs to queues. 71 */ 72 void 73 ccp_assign_lsb_regions(struct ccp_softc *sc, uint64_t lsbmask) 74 { 75 unsigned q, i; 76 77 for (q = 0; q < nitems(sc->queues); q++) { 78 if (((1 << q) & sc->valid_queues) == 0) 79 continue; 80 81 sc->queues[q].private_lsb = -1; 82 83 /* Intentionally skip specialized 0th LSB */ 84 for (i = 1; i < MAX_LSB_REGIONS; i++) { 85 if ((lsbmask & 86 (1ull << (q + (MAX_HW_QUEUES * i)))) != 0) { 87 sc->queues[q].private_lsb = i; 88 lsbmask &= ~(0x1Full << (MAX_HW_QUEUES * i)); 89 break; 90 } 91 } 92 93 if (i == MAX_LSB_REGIONS) { 94 device_printf(sc->dev, 95 "Ignoring queue %u with no private LSB\n", q); 96 sc->valid_queues &= ~(1 << q); 97 } 98 } 99 } 100