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- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2017 Conrad Meyer <cem@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #include <sys/types.h>
- #include <sys/bus.h>
- #include <sys/malloc.h>
- #include <sys/sysctl.h>
- #include <opencrypto/xform.h>
- #include "ccp.h"
- #include "ccp_lsb.h"
- void
- ccp_queue_decode_lsb_regions(struct ccp_softc *sc, uint64_t lsbmask,
- unsigned queue)
- {
- struct ccp_queue *qp;
- unsigned i;
- qp = &sc->queues[queue];
- qp->lsb_mask = 0;
- for (i = 0; i < MAX_LSB_REGIONS; i++) {
- if (((1 << queue) & lsbmask) != 0)
- qp->lsb_mask |= (1 << i);
- lsbmask >>= MAX_HW_QUEUES;
- }
- /*
- * Ignore region 0, which has special entries that cannot be used
- * generally.
- */
- qp->lsb_mask &= ~(1 << 0);
- }
- /*
- * Look for a private LSB for each queue. There are 7 general purpose LSBs
- * total and 5 queues. PSP will reserve some of both. Firmware limits some
- * queues' access to some LSBs; we hope it is fairly sane and just use a dumb
- * greedy algorithm to assign LSBs to queues.
- */
- void
- ccp_assign_lsb_regions(struct ccp_softc *sc, uint64_t lsbmask)
- {
- unsigned q, i;
- for (q = 0; q < nitems(sc->queues); q++) {
- if (((1 << q) & sc->valid_queues) == 0)
- continue;
- sc->queues[q].private_lsb = -1;
- /* Intentionally skip specialized 0th LSB */
- for (i = 1; i < MAX_LSB_REGIONS; i++) {
- if ((lsbmask &
- (1ull << (q + (MAX_HW_QUEUES * i)))) != 0) {
- sc->queues[q].private_lsb = i;
- lsbmask &= ~(0x1Full << (MAX_HW_QUEUES * i));
- break;
- }
- }
- if (i == MAX_LSB_REGIONS) {
- device_printf(sc->dev,
- "Ignoring queue %u with no private LSB\n", q);
- sc->valid_queues &= ~(1 << q);
- }
- }
- }
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