1733b79740
This was found while reworking the device tree nodes for dtsec to match the Linux device tree. Instead of waiting and expecting later code to call dpaa_portal_map_registers(), do the equivalent immediately upon mapping. Otherwise, it's possible to access the pages before that function is called, and hang the CPU.
171 lines
5.2 KiB
C
171 lines
5.2 KiB
C
/*-
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* Copyright (c) 2012 Semihalf.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "opt_platform.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/proc.h>
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#include <sys/pcpu.h>
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#include <sys/rman.h>
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#include <sys/sched.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/resource.h>
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#include <machine/tlb.h>
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#include <contrib/ncsw/inc/error_ext.h>
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#include <contrib/ncsw/inc/xx_ext.h>
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#include "portals.h"
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int
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dpaa_portal_alloc_res(device_t dev, struct dpaa_portals_devinfo *di, int cpu)
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{
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struct dpaa_portals_softc *sc = device_get_softc(dev);
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struct resource_list_entry *rle;
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int err;
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struct resource_list *res;
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/* Check if MallocSmart allocator is ready */
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if (XX_MallocSmartInit() != E_OK)
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return (ENXIO);
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res = &di->di_res;
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/*
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* Allocate memory.
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* Reserve only one pair of CE/CI virtual memory regions
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* for all CPUs, in order to save the space.
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*/
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if (sc->sc_rres[0] == NULL) {
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/* Cache enabled area */
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rle = resource_list_find(res, SYS_RES_MEMORY, 0);
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sc->sc_rrid[0] = 0;
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sc->sc_rres[0] = bus_alloc_resource(dev,
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SYS_RES_MEMORY, &sc->sc_rrid[0], rle->start + sc->sc_dp_pa,
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rle->end + sc->sc_dp_pa, rle->count, RF_ACTIVE);
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if (sc->sc_rres[0] == NULL) {
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device_printf(dev,
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"Could not allocate cache enabled memory.\n");
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return (ENXIO);
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}
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tlb1_set_entry(rman_get_bushandle(sc->sc_rres[0]),
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rle->start + sc->sc_dp_pa, rle->count, _TLB_ENTRY_MEM);
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/* Cache inhibited area */
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rle = resource_list_find(res, SYS_RES_MEMORY, 1);
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sc->sc_rrid[1] = 1;
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sc->sc_rres[1] = bus_alloc_resource(dev,
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SYS_RES_MEMORY, &sc->sc_rrid[1], rle->start + sc->sc_dp_pa,
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rle->end + sc->sc_dp_pa, rle->count, RF_ACTIVE);
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if (sc->sc_rres[1] == NULL) {
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device_printf(dev,
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"Could not allocate cache inhibited memory.\n");
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bus_release_resource(dev, SYS_RES_MEMORY,
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sc->sc_rrid[0], sc->sc_rres[0]);
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return (ENXIO);
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}
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tlb1_set_entry(rman_get_bushandle(sc->sc_rres[1]),
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rle->start + sc->sc_dp_pa, rle->count, _TLB_ENTRY_IO);
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sc->sc_dp[cpu].dp_regs_mapped = 1;
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}
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/* Acquire portal's CE_PA and CI_PA */
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rle = resource_list_find(res, SYS_RES_MEMORY, 0);
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sc->sc_dp[cpu].dp_ce_pa = rle->start + sc->sc_dp_pa;
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sc->sc_dp[cpu].dp_ce_size = rle->count;
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rle = resource_list_find(res, SYS_RES_MEMORY, 1);
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sc->sc_dp[cpu].dp_ci_pa = rle->start + sc->sc_dp_pa;
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sc->sc_dp[cpu].dp_ci_size = rle->count;
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/* Allocate interrupts */
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rle = resource_list_find(res, SYS_RES_IRQ, 0);
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sc->sc_dp[cpu].dp_irid = 0;
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sc->sc_dp[cpu].dp_ires = bus_alloc_resource(dev,
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SYS_RES_IRQ, &sc->sc_dp[cpu].dp_irid, rle->start, rle->end,
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rle->count, RF_ACTIVE);
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/* Save interrupt number for later use */
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sc->sc_dp[cpu].dp_intr_num = rle->start;
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if (sc->sc_dp[cpu].dp_ires == NULL) {
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device_printf(dev, "Could not allocate irq.\n");
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return (ENXIO);
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}
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err = XX_PreallocAndBindIntr((int)sc->sc_dp[cpu].dp_ires, cpu);
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if (err != E_OK) {
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device_printf(dev, "Could not prealloc and bind interrupt\n");
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bus_release_resource(dev, SYS_RES_IRQ,
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sc->sc_dp[cpu].dp_irid, sc->sc_dp[cpu].dp_ires);
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sc->sc_dp[cpu].dp_ires = NULL;
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return (ENXIO);
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}
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#if 0
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err = bus_generic_config_intr(dev, rle->start, di->di_intr_trig,
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di->di_intr_pol);
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if (err != 0) {
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device_printf(dev, "Could not configure interrupt\n");
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bus_release_resource(dev, SYS_RES_IRQ,
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sc->sc_dp[cpu].dp_irid, sc->sc_dp[cpu].dp_ires);
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sc->sc_dp[cpu].dp_ires = NULL;
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return (err);
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}
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#endif
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return (0);
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}
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void
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dpaa_portal_map_registers(struct dpaa_portals_softc *sc)
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{
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unsigned int cpu;
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sched_pin();
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cpu = PCPU_GET(cpuid);
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if (sc->sc_dp[cpu].dp_regs_mapped)
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goto out;
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tlb1_set_entry(rman_get_bushandle(sc->sc_rres[0]),
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sc->sc_dp[cpu].dp_ce_pa, sc->sc_dp[cpu].dp_ce_size,
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_TLB_ENTRY_MEM);
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tlb1_set_entry(rman_get_bushandle(sc->sc_rres[1]),
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sc->sc_dp[cpu].dp_ci_pa, sc->sc_dp[cpu].dp_ci_size,
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_TLB_ENTRY_IO);
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sc->sc_dp[cpu].dp_regs_mapped = 1;
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out:
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sched_unpin();
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}
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