2086 lines
51 KiB
C
2086 lines
51 KiB
C
/*-
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* Copyright (C) 2012 Intel Corporation
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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 <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/bus.h>
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#include <sys/conf.h>
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#include <sys/ioccom.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <sys/sbuf.h>
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#include <sys/sysctl.h>
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#include <sys/taskqueue.h>
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#include <sys/time.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <machine/stdarg.h>
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#include "ioat.h"
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#include "ioat_hw.h"
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#include "ioat_internal.h"
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#ifndef BUS_SPACE_MAXADDR_40BIT
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#define BUS_SPACE_MAXADDR_40BIT 0xFFFFFFFFFFULL
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#endif
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#define IOAT_INTR_TIMO (hz / 10)
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#define IOAT_REFLK (&ioat->submit_lock)
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static int ioat_probe(device_t device);
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static int ioat_attach(device_t device);
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static int ioat_detach(device_t device);
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static int ioat_setup_intr(struct ioat_softc *ioat);
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static int ioat_teardown_intr(struct ioat_softc *ioat);
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static int ioat3_attach(device_t device);
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static int ioat_start_channel(struct ioat_softc *ioat);
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static int ioat_map_pci_bar(struct ioat_softc *ioat);
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static void ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg,
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int error);
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static void ioat_interrupt_handler(void *arg);
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static boolean_t ioat_model_resets_msix(struct ioat_softc *ioat);
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static int chanerr_to_errno(uint32_t);
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static void ioat_process_events(struct ioat_softc *ioat);
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static inline uint32_t ioat_get_active(struct ioat_softc *ioat);
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static inline uint32_t ioat_get_ring_space(struct ioat_softc *ioat);
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static void ioat_free_ring(struct ioat_softc *, uint32_t size,
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struct ioat_descriptor **);
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static void ioat_free_ring_entry(struct ioat_softc *ioat,
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struct ioat_descriptor *desc);
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static struct ioat_descriptor *ioat_alloc_ring_entry(struct ioat_softc *,
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int mflags);
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static int ioat_reserve_space(struct ioat_softc *, uint32_t, int mflags);
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static struct ioat_descriptor *ioat_get_ring_entry(struct ioat_softc *ioat,
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uint32_t index);
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static struct ioat_descriptor **ioat_prealloc_ring(struct ioat_softc *,
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uint32_t size, boolean_t need_dscr, int mflags);
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static int ring_grow(struct ioat_softc *, uint32_t oldorder,
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struct ioat_descriptor **);
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static int ring_shrink(struct ioat_softc *, uint32_t oldorder,
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struct ioat_descriptor **);
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static void ioat_halted_debug(struct ioat_softc *, uint32_t);
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static void ioat_timer_callback(void *arg);
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static void dump_descriptor(void *hw_desc);
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static void ioat_submit_single(struct ioat_softc *ioat);
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static void ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg,
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int error);
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static int ioat_reset_hw(struct ioat_softc *ioat);
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static void ioat_reset_hw_task(void *, int);
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static void ioat_setup_sysctl(device_t device);
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static int sysctl_handle_reset(SYSCTL_HANDLER_ARGS);
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static inline struct ioat_softc *ioat_get(struct ioat_softc *,
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enum ioat_ref_kind);
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static inline void ioat_put(struct ioat_softc *, enum ioat_ref_kind);
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static inline void _ioat_putn(struct ioat_softc *, uint32_t,
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enum ioat_ref_kind, boolean_t);
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static inline void ioat_putn(struct ioat_softc *, uint32_t,
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enum ioat_ref_kind);
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static inline void ioat_putn_locked(struct ioat_softc *, uint32_t,
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enum ioat_ref_kind);
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static void ioat_drain_locked(struct ioat_softc *);
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#define ioat_log_message(v, ...) do { \
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if ((v) <= g_ioat_debug_level) { \
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device_printf(ioat->device, __VA_ARGS__); \
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} \
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} while (0)
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MALLOC_DEFINE(M_IOAT, "ioat", "ioat driver memory allocations");
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SYSCTL_NODE(_hw, OID_AUTO, ioat, CTLFLAG_RD, 0, "ioat node");
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static int g_force_legacy_interrupts;
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SYSCTL_INT(_hw_ioat, OID_AUTO, force_legacy_interrupts, CTLFLAG_RDTUN,
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&g_force_legacy_interrupts, 0, "Set to non-zero to force MSI-X disabled");
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int g_ioat_debug_level = 0;
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SYSCTL_INT(_hw_ioat, OID_AUTO, debug_level, CTLFLAG_RWTUN, &g_ioat_debug_level,
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0, "Set log level (0-3) for ioat(4). Higher is more verbose.");
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/*
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* OS <-> Driver interface structures
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*/
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static device_method_t ioat_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ioat_probe),
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DEVMETHOD(device_attach, ioat_attach),
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DEVMETHOD(device_detach, ioat_detach),
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DEVMETHOD_END
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};
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static driver_t ioat_pci_driver = {
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"ioat",
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ioat_pci_methods,
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sizeof(struct ioat_softc),
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};
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static devclass_t ioat_devclass;
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DRIVER_MODULE(ioat, pci, ioat_pci_driver, ioat_devclass, 0, 0);
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MODULE_VERSION(ioat, 1);
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/*
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* Private data structures
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*/
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static struct ioat_softc *ioat_channel[IOAT_MAX_CHANNELS];
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static int ioat_channel_index = 0;
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SYSCTL_INT(_hw_ioat, OID_AUTO, channels, CTLFLAG_RD, &ioat_channel_index, 0,
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"Number of IOAT channels attached");
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static struct _pcsid
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{
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u_int32_t type;
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const char *desc;
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} pci_ids[] = {
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{ 0x34308086, "TBG IOAT Ch0" },
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{ 0x34318086, "TBG IOAT Ch1" },
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{ 0x34328086, "TBG IOAT Ch2" },
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{ 0x34338086, "TBG IOAT Ch3" },
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{ 0x34298086, "TBG IOAT Ch4" },
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{ 0x342a8086, "TBG IOAT Ch5" },
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{ 0x342b8086, "TBG IOAT Ch6" },
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{ 0x342c8086, "TBG IOAT Ch7" },
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{ 0x37108086, "JSF IOAT Ch0" },
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{ 0x37118086, "JSF IOAT Ch1" },
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{ 0x37128086, "JSF IOAT Ch2" },
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{ 0x37138086, "JSF IOAT Ch3" },
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{ 0x37148086, "JSF IOAT Ch4" },
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{ 0x37158086, "JSF IOAT Ch5" },
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{ 0x37168086, "JSF IOAT Ch6" },
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{ 0x37178086, "JSF IOAT Ch7" },
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{ 0x37188086, "JSF IOAT Ch0 (RAID)" },
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{ 0x37198086, "JSF IOAT Ch1 (RAID)" },
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{ 0x3c208086, "SNB IOAT Ch0" },
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{ 0x3c218086, "SNB IOAT Ch1" },
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{ 0x3c228086, "SNB IOAT Ch2" },
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{ 0x3c238086, "SNB IOAT Ch3" },
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{ 0x3c248086, "SNB IOAT Ch4" },
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{ 0x3c258086, "SNB IOAT Ch5" },
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{ 0x3c268086, "SNB IOAT Ch6" },
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{ 0x3c278086, "SNB IOAT Ch7" },
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{ 0x3c2e8086, "SNB IOAT Ch0 (RAID)" },
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{ 0x3c2f8086, "SNB IOAT Ch1 (RAID)" },
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{ 0x0e208086, "IVB IOAT Ch0" },
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{ 0x0e218086, "IVB IOAT Ch1" },
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{ 0x0e228086, "IVB IOAT Ch2" },
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{ 0x0e238086, "IVB IOAT Ch3" },
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{ 0x0e248086, "IVB IOAT Ch4" },
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{ 0x0e258086, "IVB IOAT Ch5" },
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{ 0x0e268086, "IVB IOAT Ch6" },
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{ 0x0e278086, "IVB IOAT Ch7" },
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{ 0x0e2e8086, "IVB IOAT Ch0 (RAID)" },
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{ 0x0e2f8086, "IVB IOAT Ch1 (RAID)" },
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{ 0x2f208086, "HSW IOAT Ch0" },
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{ 0x2f218086, "HSW IOAT Ch1" },
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{ 0x2f228086, "HSW IOAT Ch2" },
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{ 0x2f238086, "HSW IOAT Ch3" },
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{ 0x2f248086, "HSW IOAT Ch4" },
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{ 0x2f258086, "HSW IOAT Ch5" },
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{ 0x2f268086, "HSW IOAT Ch6" },
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{ 0x2f278086, "HSW IOAT Ch7" },
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{ 0x2f2e8086, "HSW IOAT Ch0 (RAID)" },
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{ 0x2f2f8086, "HSW IOAT Ch1 (RAID)" },
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{ 0x0c508086, "BWD IOAT Ch0" },
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{ 0x0c518086, "BWD IOAT Ch1" },
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{ 0x0c528086, "BWD IOAT Ch2" },
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{ 0x0c538086, "BWD IOAT Ch3" },
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{ 0x6f508086, "BDXDE IOAT Ch0" },
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{ 0x6f518086, "BDXDE IOAT Ch1" },
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{ 0x6f528086, "BDXDE IOAT Ch2" },
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{ 0x6f538086, "BDXDE IOAT Ch3" },
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{ 0x6f208086, "BDX IOAT Ch0" },
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{ 0x6f218086, "BDX IOAT Ch1" },
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{ 0x6f228086, "BDX IOAT Ch2" },
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{ 0x6f238086, "BDX IOAT Ch3" },
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{ 0x6f248086, "BDX IOAT Ch4" },
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{ 0x6f258086, "BDX IOAT Ch5" },
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{ 0x6f268086, "BDX IOAT Ch6" },
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{ 0x6f278086, "BDX IOAT Ch7" },
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{ 0x6f2e8086, "BDX IOAT Ch0 (RAID)" },
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{ 0x6f2f8086, "BDX IOAT Ch1 (RAID)" },
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{ 0x00000000, NULL }
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};
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/*
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* OS <-> Driver linkage functions
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*/
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static int
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ioat_probe(device_t device)
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{
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struct _pcsid *ep;
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u_int32_t type;
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type = pci_get_devid(device);
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for (ep = pci_ids; ep->type; ep++) {
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if (ep->type == type) {
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device_set_desc(device, ep->desc);
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return (0);
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}
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}
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return (ENXIO);
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}
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static int
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ioat_attach(device_t device)
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{
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struct ioat_softc *ioat;
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int error;
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ioat = DEVICE2SOFTC(device);
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ioat->device = device;
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error = ioat_map_pci_bar(ioat);
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if (error != 0)
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goto err;
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ioat->version = ioat_read_cbver(ioat);
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if (ioat->version < IOAT_VER_3_0) {
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error = ENODEV;
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goto err;
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}
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error = ioat3_attach(device);
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if (error != 0)
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goto err;
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error = pci_enable_busmaster(device);
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if (error != 0)
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goto err;
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error = ioat_setup_intr(ioat);
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if (error != 0)
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goto err;
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error = ioat_reset_hw(ioat);
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if (error != 0)
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goto err;
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ioat_process_events(ioat);
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ioat_setup_sysctl(device);
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ioat->chan_idx = ioat_channel_index;
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ioat_channel[ioat_channel_index++] = ioat;
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ioat_test_attach();
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err:
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if (error != 0)
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ioat_detach(device);
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return (error);
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}
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static int
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ioat_detach(device_t device)
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{
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struct ioat_softc *ioat;
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ioat = DEVICE2SOFTC(device);
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ioat_test_detach();
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taskqueue_drain(taskqueue_thread, &ioat->reset_task);
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mtx_lock(IOAT_REFLK);
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ioat->quiescing = TRUE;
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ioat->destroying = TRUE;
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wakeup(&ioat->quiescing);
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ioat_channel[ioat->chan_idx] = NULL;
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ioat_drain_locked(ioat);
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mtx_unlock(IOAT_REFLK);
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ioat_teardown_intr(ioat);
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callout_drain(&ioat->timer);
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pci_disable_busmaster(device);
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if (ioat->pci_resource != NULL)
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bus_release_resource(device, SYS_RES_MEMORY,
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ioat->pci_resource_id, ioat->pci_resource);
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if (ioat->ring != NULL)
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ioat_free_ring(ioat, 1 << ioat->ring_size_order, ioat->ring);
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if (ioat->comp_update != NULL) {
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bus_dmamap_unload(ioat->comp_update_tag, ioat->comp_update_map);
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bus_dmamem_free(ioat->comp_update_tag, ioat->comp_update,
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ioat->comp_update_map);
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bus_dma_tag_destroy(ioat->comp_update_tag);
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}
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bus_dma_tag_destroy(ioat->hw_desc_tag);
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return (0);
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}
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static int
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ioat_teardown_intr(struct ioat_softc *ioat)
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{
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if (ioat->tag != NULL)
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bus_teardown_intr(ioat->device, ioat->res, ioat->tag);
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if (ioat->res != NULL)
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bus_release_resource(ioat->device, SYS_RES_IRQ,
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rman_get_rid(ioat->res), ioat->res);
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pci_release_msi(ioat->device);
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return (0);
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}
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static int
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ioat_start_channel(struct ioat_softc *ioat)
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{
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uint64_t status;
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uint32_t chanerr;
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int i;
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ioat_acquire(&ioat->dmaengine);
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ioat_null(&ioat->dmaengine, NULL, NULL, 0);
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ioat_release(&ioat->dmaengine);
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for (i = 0; i < 100; i++) {
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DELAY(1);
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status = ioat_get_chansts(ioat);
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if (is_ioat_idle(status))
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return (0);
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}
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chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET);
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ioat_log_message(0, "could not start channel: "
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"status = %#jx error = %b\n", (uintmax_t)status, (int)chanerr,
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IOAT_CHANERR_STR);
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return (ENXIO);
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}
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/*
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* Initialize Hardware
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*/
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static int
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ioat3_attach(device_t device)
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{
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struct ioat_softc *ioat;
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struct ioat_descriptor **ring;
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struct ioat_descriptor *next;
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struct ioat_dma_hw_descriptor *dma_hw_desc;
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int i, num_descriptors;
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int error;
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uint8_t xfercap;
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error = 0;
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ioat = DEVICE2SOFTC(device);
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ioat->capabilities = ioat_read_dmacapability(ioat);
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ioat_log_message(1, "Capabilities: %b\n", (int)ioat->capabilities,
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IOAT_DMACAP_STR);
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xfercap = ioat_read_xfercap(ioat);
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ioat->max_xfer_size = 1 << xfercap;
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ioat->intrdelay_supported = (ioat_read_2(ioat, IOAT_INTRDELAY_OFFSET) &
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IOAT_INTRDELAY_SUPPORTED) != 0;
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if (ioat->intrdelay_supported)
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ioat->intrdelay_max = IOAT_INTRDELAY_US_MASK;
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/* TODO: need to check DCA here if we ever do XOR/PQ */
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mtx_init(&ioat->submit_lock, "ioat_submit", NULL, MTX_DEF);
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mtx_init(&ioat->cleanup_lock, "ioat_cleanup", NULL, MTX_DEF);
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callout_init(&ioat->timer, 1);
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TASK_INIT(&ioat->reset_task, 0, ioat_reset_hw_task, ioat);
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|
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/* Establish lock order for Witness */
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mtx_lock(&ioat->submit_lock);
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mtx_lock(&ioat->cleanup_lock);
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mtx_unlock(&ioat->cleanup_lock);
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mtx_unlock(&ioat->submit_lock);
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ioat->is_resize_pending = FALSE;
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ioat->is_completion_pending = FALSE;
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ioat->is_reset_pending = FALSE;
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ioat->is_channel_running = FALSE;
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bus_dma_tag_create(bus_get_dma_tag(ioat->device), sizeof(uint64_t), 0x0,
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BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
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sizeof(uint64_t), 1, sizeof(uint64_t), 0, NULL, NULL,
|
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&ioat->comp_update_tag);
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|
|
|
error = bus_dmamem_alloc(ioat->comp_update_tag,
|
|
(void **)&ioat->comp_update, BUS_DMA_ZERO, &ioat->comp_update_map);
|
|
if (ioat->comp_update == NULL)
|
|
return (ENOMEM);
|
|
|
|
error = bus_dmamap_load(ioat->comp_update_tag, ioat->comp_update_map,
|
|
ioat->comp_update, sizeof(uint64_t), ioat_comp_update_map, ioat,
|
|
0);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
ioat->ring_size_order = IOAT_MIN_ORDER;
|
|
|
|
num_descriptors = 1 << ioat->ring_size_order;
|
|
|
|
bus_dma_tag_create(bus_get_dma_tag(ioat->device), 0x40, 0x0,
|
|
BUS_SPACE_MAXADDR_40BIT, BUS_SPACE_MAXADDR, NULL, NULL,
|
|
sizeof(struct ioat_dma_hw_descriptor), 1,
|
|
sizeof(struct ioat_dma_hw_descriptor), 0, NULL, NULL,
|
|
&ioat->hw_desc_tag);
|
|
|
|
ioat->ring = malloc(num_descriptors * sizeof(*ring), M_IOAT,
|
|
M_ZERO | M_WAITOK);
|
|
|
|
ring = ioat->ring;
|
|
for (i = 0; i < num_descriptors; i++) {
|
|
ring[i] = ioat_alloc_ring_entry(ioat, M_WAITOK);
|
|
if (ring[i] == NULL)
|
|
return (ENOMEM);
|
|
|
|
ring[i]->id = i;
|
|
}
|
|
|
|
for (i = 0; i < num_descriptors - 1; i++) {
|
|
next = ring[i + 1];
|
|
dma_hw_desc = ring[i]->u.dma;
|
|
|
|
dma_hw_desc->next = next->hw_desc_bus_addr;
|
|
}
|
|
|
|
ring[i]->u.dma->next = ring[0]->hw_desc_bus_addr;
|
|
|
|
ioat->head = ioat->hw_head = 0;
|
|
ioat->tail = 0;
|
|
ioat->last_seen = 0;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ioat_map_pci_bar(struct ioat_softc *ioat)
|
|
{
|
|
|
|
ioat->pci_resource_id = PCIR_BAR(0);
|
|
ioat->pci_resource = bus_alloc_resource_any(ioat->device,
|
|
SYS_RES_MEMORY, &ioat->pci_resource_id, RF_ACTIVE);
|
|
|
|
if (ioat->pci_resource == NULL) {
|
|
ioat_log_message(0, "unable to allocate pci resource\n");
|
|
return (ENODEV);
|
|
}
|
|
|
|
ioat->pci_bus_tag = rman_get_bustag(ioat->pci_resource);
|
|
ioat->pci_bus_handle = rman_get_bushandle(ioat->pci_resource);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg, int error)
|
|
{
|
|
struct ioat_softc *ioat = arg;
|
|
|
|
KASSERT(error == 0, ("%s: error:%d", __func__, error));
|
|
ioat->comp_update_bus_addr = seg[0].ds_addr;
|
|
}
|
|
|
|
static void
|
|
ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
|
|
{
|
|
bus_addr_t *baddr;
|
|
|
|
KASSERT(error == 0, ("%s: error:%d", __func__, error));
|
|
baddr = arg;
|
|
*baddr = segs->ds_addr;
|
|
}
|
|
|
|
/*
|
|
* Interrupt setup and handlers
|
|
*/
|
|
static int
|
|
ioat_setup_intr(struct ioat_softc *ioat)
|
|
{
|
|
uint32_t num_vectors;
|
|
int error;
|
|
boolean_t use_msix;
|
|
boolean_t force_legacy_interrupts;
|
|
|
|
use_msix = FALSE;
|
|
force_legacy_interrupts = FALSE;
|
|
|
|
if (!g_force_legacy_interrupts && pci_msix_count(ioat->device) >= 1) {
|
|
num_vectors = 1;
|
|
pci_alloc_msix(ioat->device, &num_vectors);
|
|
if (num_vectors == 1)
|
|
use_msix = TRUE;
|
|
}
|
|
|
|
if (use_msix) {
|
|
ioat->rid = 1;
|
|
ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ,
|
|
&ioat->rid, RF_ACTIVE);
|
|
} else {
|
|
ioat->rid = 0;
|
|
ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ,
|
|
&ioat->rid, RF_SHAREABLE | RF_ACTIVE);
|
|
}
|
|
if (ioat->res == NULL) {
|
|
ioat_log_message(0, "bus_alloc_resource failed\n");
|
|
return (ENOMEM);
|
|
}
|
|
|
|
ioat->tag = NULL;
|
|
error = bus_setup_intr(ioat->device, ioat->res, INTR_MPSAFE |
|
|
INTR_TYPE_MISC, NULL, ioat_interrupt_handler, ioat, &ioat->tag);
|
|
if (error != 0) {
|
|
ioat_log_message(0, "bus_setup_intr failed\n");
|
|
return (error);
|
|
}
|
|
|
|
ioat_write_intrctrl(ioat, IOAT_INTRCTRL_MASTER_INT_EN);
|
|
return (0);
|
|
}
|
|
|
|
static boolean_t
|
|
ioat_model_resets_msix(struct ioat_softc *ioat)
|
|
{
|
|
u_int32_t pciid;
|
|
|
|
pciid = pci_get_devid(ioat->device);
|
|
switch (pciid) {
|
|
/* BWD: */
|
|
case 0x0c508086:
|
|
case 0x0c518086:
|
|
case 0x0c528086:
|
|
case 0x0c538086:
|
|
/* BDXDE: */
|
|
case 0x6f508086:
|
|
case 0x6f518086:
|
|
case 0x6f528086:
|
|
case 0x6f538086:
|
|
return (TRUE);
|
|
}
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
static void
|
|
ioat_interrupt_handler(void *arg)
|
|
{
|
|
struct ioat_softc *ioat = arg;
|
|
|
|
ioat->stats.interrupts++;
|
|
ioat_process_events(ioat);
|
|
}
|
|
|
|
static int
|
|
chanerr_to_errno(uint32_t chanerr)
|
|
{
|
|
|
|
if (chanerr == 0)
|
|
return (0);
|
|
if ((chanerr & (IOAT_CHANERR_XSADDERR | IOAT_CHANERR_XDADDERR)) != 0)
|
|
return (EFAULT);
|
|
if ((chanerr & (IOAT_CHANERR_RDERR | IOAT_CHANERR_WDERR)) != 0)
|
|
return (EIO);
|
|
/* This one is probably our fault: */
|
|
if ((chanerr & IOAT_CHANERR_NDADDERR) != 0)
|
|
return (EIO);
|
|
return (EIO);
|
|
}
|
|
|
|
static void
|
|
ioat_process_events(struct ioat_softc *ioat)
|
|
{
|
|
struct ioat_descriptor *desc;
|
|
struct bus_dmadesc *dmadesc;
|
|
uint64_t comp_update, status;
|
|
uint32_t completed, chanerr;
|
|
int error;
|
|
|
|
mtx_lock(&ioat->cleanup_lock);
|
|
|
|
completed = 0;
|
|
comp_update = *ioat->comp_update;
|
|
status = comp_update & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_MASK;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
|
|
if (status == ioat->last_seen) {
|
|
/*
|
|
* If we landed in process_events and nothing has been
|
|
* completed, check for a timeout due to channel halt.
|
|
*/
|
|
comp_update = ioat_get_chansts(ioat);
|
|
goto out;
|
|
}
|
|
|
|
while (1) {
|
|
desc = ioat_get_ring_entry(ioat, ioat->tail);
|
|
dmadesc = &desc->bus_dmadesc;
|
|
CTR1(KTR_IOAT, "completing desc %d", ioat->tail);
|
|
|
|
if (dmadesc->callback_fn != NULL)
|
|
dmadesc->callback_fn(dmadesc->callback_arg, 0);
|
|
|
|
completed++;
|
|
ioat->tail++;
|
|
if (desc->hw_desc_bus_addr == status)
|
|
break;
|
|
}
|
|
|
|
ioat->last_seen = desc->hw_desc_bus_addr;
|
|
|
|
if (ioat->head == ioat->tail) {
|
|
ioat->is_completion_pending = FALSE;
|
|
callout_reset(&ioat->timer, IOAT_INTR_TIMO,
|
|
ioat_timer_callback, ioat);
|
|
}
|
|
|
|
ioat->stats.descriptors_processed += completed;
|
|
|
|
out:
|
|
ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN);
|
|
mtx_unlock(&ioat->cleanup_lock);
|
|
|
|
if (completed != 0) {
|
|
ioat_putn(ioat, completed, IOAT_ACTIVE_DESCR_REF);
|
|
wakeup(&ioat->tail);
|
|
}
|
|
|
|
if (!is_ioat_halted(comp_update) && !is_ioat_suspended(comp_update))
|
|
return;
|
|
|
|
ioat->stats.channel_halts++;
|
|
|
|
/*
|
|
* Fatal programming error on this DMA channel. Flush any outstanding
|
|
* work with error status and restart the engine.
|
|
*/
|
|
ioat_log_message(0, "Channel halted due to fatal programming error\n");
|
|
mtx_lock(&ioat->submit_lock);
|
|
mtx_lock(&ioat->cleanup_lock);
|
|
ioat->quiescing = TRUE;
|
|
|
|
chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET);
|
|
ioat_halted_debug(ioat, chanerr);
|
|
ioat->stats.last_halt_chanerr = chanerr;
|
|
|
|
while (ioat_get_active(ioat) > 0) {
|
|
desc = ioat_get_ring_entry(ioat, ioat->tail);
|
|
dmadesc = &desc->bus_dmadesc;
|
|
CTR1(KTR_IOAT, "completing err desc %d", ioat->tail);
|
|
|
|
if (dmadesc->callback_fn != NULL)
|
|
dmadesc->callback_fn(dmadesc->callback_arg,
|
|
chanerr_to_errno(chanerr));
|
|
|
|
ioat_putn_locked(ioat, 1, IOAT_ACTIVE_DESCR_REF);
|
|
ioat->tail++;
|
|
ioat->stats.descriptors_processed++;
|
|
ioat->stats.descriptors_error++;
|
|
}
|
|
|
|
/* Clear error status */
|
|
ioat_write_4(ioat, IOAT_CHANERR_OFFSET, chanerr);
|
|
|
|
mtx_unlock(&ioat->cleanup_lock);
|
|
mtx_unlock(&ioat->submit_lock);
|
|
|
|
ioat_log_message(0, "Resetting channel to recover from error\n");
|
|
error = taskqueue_enqueue(taskqueue_thread, &ioat->reset_task);
|
|
KASSERT(error == 0,
|
|
("%s: taskqueue_enqueue failed: %d", __func__, error));
|
|
}
|
|
|
|
static void
|
|
ioat_reset_hw_task(void *ctx, int pending __unused)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
int error;
|
|
|
|
ioat = ctx;
|
|
ioat_log_message(1, "%s: Resetting channel\n", __func__);
|
|
|
|
error = ioat_reset_hw(ioat);
|
|
KASSERT(error == 0, ("%s: reset failed: %d", __func__, error));
|
|
(void)error;
|
|
}
|
|
|
|
/*
|
|
* User API functions
|
|
*/
|
|
bus_dmaengine_t
|
|
ioat_get_dmaengine(uint32_t index, int flags)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
KASSERT((flags & ~(M_NOWAIT | M_WAITOK)) == 0,
|
|
("invalid flags: 0x%08x", flags));
|
|
KASSERT((flags & (M_NOWAIT | M_WAITOK)) != (M_NOWAIT | M_WAITOK),
|
|
("invalid wait | nowait"));
|
|
|
|
if (index >= ioat_channel_index)
|
|
return (NULL);
|
|
|
|
ioat = ioat_channel[index];
|
|
if (ioat == NULL || ioat->destroying)
|
|
return (NULL);
|
|
|
|
if (ioat->quiescing) {
|
|
if ((flags & M_NOWAIT) != 0)
|
|
return (NULL);
|
|
|
|
mtx_lock(IOAT_REFLK);
|
|
while (ioat->quiescing && !ioat->destroying)
|
|
msleep(&ioat->quiescing, IOAT_REFLK, 0, "getdma", 0);
|
|
mtx_unlock(IOAT_REFLK);
|
|
|
|
if (ioat->destroying)
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* There's a race here between the quiescing check and HW reset or
|
|
* module destroy.
|
|
*/
|
|
return (&ioat_get(ioat, IOAT_DMAENGINE_REF)->dmaengine);
|
|
}
|
|
|
|
void
|
|
ioat_put_dmaengine(bus_dmaengine_t dmaengine)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
ioat_put(ioat, IOAT_DMAENGINE_REF);
|
|
}
|
|
|
|
int
|
|
ioat_get_hwversion(bus_dmaengine_t dmaengine)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
return (ioat->version);
|
|
}
|
|
|
|
size_t
|
|
ioat_get_max_io_size(bus_dmaengine_t dmaengine)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
return (ioat->max_xfer_size);
|
|
}
|
|
|
|
int
|
|
ioat_set_interrupt_coalesce(bus_dmaengine_t dmaengine, uint16_t delay)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
if (!ioat->intrdelay_supported)
|
|
return (ENODEV);
|
|
if (delay > ioat->intrdelay_max)
|
|
return (ERANGE);
|
|
|
|
ioat_write_2(ioat, IOAT_INTRDELAY_OFFSET, delay);
|
|
ioat->cached_intrdelay =
|
|
ioat_read_2(ioat, IOAT_INTRDELAY_OFFSET) & IOAT_INTRDELAY_US_MASK;
|
|
return (0);
|
|
}
|
|
|
|
uint16_t
|
|
ioat_get_max_coalesce_period(bus_dmaengine_t dmaengine)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
return (ioat->intrdelay_max);
|
|
}
|
|
|
|
void
|
|
ioat_acquire(bus_dmaengine_t dmaengine)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
mtx_lock(&ioat->submit_lock);
|
|
CTR0(KTR_IOAT, __func__);
|
|
}
|
|
|
|
int
|
|
ioat_acquire_reserve(bus_dmaengine_t dmaengine, unsigned n, int mflags)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
int error;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
ioat_acquire(dmaengine);
|
|
|
|
error = ioat_reserve_space(ioat, n, mflags);
|
|
if (error != 0)
|
|
ioat_release(dmaengine);
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
ioat_release(bus_dmaengine_t dmaengine)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = to_ioat_softc(dmaengine);
|
|
CTR0(KTR_IOAT, __func__);
|
|
ioat_write_2(ioat, IOAT_DMACOUNT_OFFSET, (uint16_t)ioat->hw_head);
|
|
mtx_unlock(&ioat->submit_lock);
|
|
}
|
|
|
|
static struct ioat_descriptor *
|
|
ioat_op_generic(struct ioat_softc *ioat, uint8_t op,
|
|
uint32_t size, uint64_t src, uint64_t dst,
|
|
bus_dmaengine_callback_t callback_fn, void *callback_arg,
|
|
uint32_t flags)
|
|
{
|
|
struct ioat_generic_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
int mflags;
|
|
|
|
mtx_assert(&ioat->submit_lock, MA_OWNED);
|
|
|
|
KASSERT((flags & ~_DMA_GENERIC_FLAGS) == 0,
|
|
("Unrecognized flag(s): %#x", flags & ~_DMA_GENERIC_FLAGS));
|
|
if ((flags & DMA_NO_WAIT) != 0)
|
|
mflags = M_NOWAIT;
|
|
else
|
|
mflags = M_WAITOK;
|
|
|
|
if (size > ioat->max_xfer_size) {
|
|
ioat_log_message(0, "%s: max_xfer_size = %d, requested = %u\n",
|
|
__func__, ioat->max_xfer_size, (unsigned)size);
|
|
return (NULL);
|
|
}
|
|
|
|
if (ioat_reserve_space(ioat, 1, mflags) != 0)
|
|
return (NULL);
|
|
|
|
desc = ioat_get_ring_entry(ioat, ioat->head);
|
|
hw_desc = desc->u.generic;
|
|
|
|
hw_desc->u.control_raw = 0;
|
|
hw_desc->u.control_generic.op = op;
|
|
hw_desc->u.control_generic.completion_update = 1;
|
|
|
|
if ((flags & DMA_INT_EN) != 0)
|
|
hw_desc->u.control_generic.int_enable = 1;
|
|
if ((flags & DMA_FENCE) != 0)
|
|
hw_desc->u.control_generic.fence = 1;
|
|
|
|
hw_desc->size = size;
|
|
hw_desc->src_addr = src;
|
|
hw_desc->dest_addr = dst;
|
|
|
|
desc->bus_dmadesc.callback_fn = callback_fn;
|
|
desc->bus_dmadesc.callback_arg = callback_arg;
|
|
return (desc);
|
|
}
|
|
|
|
struct bus_dmadesc *
|
|
ioat_null(bus_dmaengine_t dmaengine, bus_dmaengine_callback_t callback_fn,
|
|
void *callback_arg, uint32_t flags)
|
|
{
|
|
struct ioat_dma_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
struct ioat_softc *ioat;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
ioat = to_ioat_softc(dmaengine);
|
|
|
|
desc = ioat_op_generic(ioat, IOAT_OP_COPY, 8, 0, 0, callback_fn,
|
|
callback_arg, flags);
|
|
if (desc == NULL)
|
|
return (NULL);
|
|
|
|
hw_desc = desc->u.dma;
|
|
hw_desc->u.control.null = 1;
|
|
ioat_submit_single(ioat);
|
|
return (&desc->bus_dmadesc);
|
|
}
|
|
|
|
struct bus_dmadesc *
|
|
ioat_copy(bus_dmaengine_t dmaengine, bus_addr_t dst,
|
|
bus_addr_t src, bus_size_t len, bus_dmaengine_callback_t callback_fn,
|
|
void *callback_arg, uint32_t flags)
|
|
{
|
|
struct ioat_dma_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
struct ioat_softc *ioat;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
ioat = to_ioat_softc(dmaengine);
|
|
|
|
if (((src | dst) & (0xffffull << 48)) != 0) {
|
|
ioat_log_message(0, "%s: High 16 bits of src/dst invalid\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
|
|
desc = ioat_op_generic(ioat, IOAT_OP_COPY, len, src, dst, callback_fn,
|
|
callback_arg, flags);
|
|
if (desc == NULL)
|
|
return (NULL);
|
|
|
|
hw_desc = desc->u.dma;
|
|
if (g_ioat_debug_level >= 3)
|
|
dump_descriptor(hw_desc);
|
|
|
|
ioat_submit_single(ioat);
|
|
return (&desc->bus_dmadesc);
|
|
}
|
|
|
|
struct bus_dmadesc *
|
|
ioat_copy_8k_aligned(bus_dmaengine_t dmaengine, bus_addr_t dst1,
|
|
bus_addr_t dst2, bus_addr_t src1, bus_addr_t src2,
|
|
bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags)
|
|
{
|
|
struct ioat_dma_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
struct ioat_softc *ioat;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
ioat = to_ioat_softc(dmaengine);
|
|
|
|
if (((src1 | src2 | dst1 | dst2) & (0xffffull << 48)) != 0) {
|
|
ioat_log_message(0, "%s: High 16 bits of src/dst invalid\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
if (((src1 | src2 | dst1 | dst2) & PAGE_MASK) != 0) {
|
|
ioat_log_message(0, "%s: Addresses must be page-aligned\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
|
|
desc = ioat_op_generic(ioat, IOAT_OP_COPY, 2 * PAGE_SIZE, src1, dst1,
|
|
callback_fn, callback_arg, flags);
|
|
if (desc == NULL)
|
|
return (NULL);
|
|
|
|
hw_desc = desc->u.dma;
|
|
if (src2 != src1 + PAGE_SIZE) {
|
|
hw_desc->u.control.src_page_break = 1;
|
|
hw_desc->next_src_addr = src2;
|
|
}
|
|
if (dst2 != dst1 + PAGE_SIZE) {
|
|
hw_desc->u.control.dest_page_break = 1;
|
|
hw_desc->next_dest_addr = dst2;
|
|
}
|
|
|
|
if (g_ioat_debug_level >= 3)
|
|
dump_descriptor(hw_desc);
|
|
|
|
ioat_submit_single(ioat);
|
|
return (&desc->bus_dmadesc);
|
|
}
|
|
|
|
struct bus_dmadesc *
|
|
ioat_copy_crc(bus_dmaengine_t dmaengine, bus_addr_t dst, bus_addr_t src,
|
|
bus_size_t len, uint32_t *initialseed, bus_addr_t crcptr,
|
|
bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags)
|
|
{
|
|
struct ioat_crc32_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
struct ioat_softc *ioat;
|
|
uint32_t teststore;
|
|
uint8_t op;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
ioat = to_ioat_softc(dmaengine);
|
|
|
|
if ((ioat->capabilities & IOAT_DMACAP_MOVECRC) == 0) {
|
|
ioat_log_message(0, "%s: Device lacks MOVECRC capability\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
if (((src | dst) & (0xffffffull << 40)) != 0) {
|
|
ioat_log_message(0, "%s: High 24 bits of src/dst invalid\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
teststore = (flags & _DMA_CRC_TESTSTORE);
|
|
if (teststore == _DMA_CRC_TESTSTORE) {
|
|
ioat_log_message(0, "%s: TEST and STORE invalid\n", __func__);
|
|
return (NULL);
|
|
}
|
|
if (teststore == 0 && (flags & DMA_CRC_INLINE) != 0) {
|
|
ioat_log_message(0, "%s: INLINE invalid without TEST or STORE\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
|
|
switch (teststore) {
|
|
case DMA_CRC_STORE:
|
|
op = IOAT_OP_MOVECRC_STORE;
|
|
break;
|
|
case DMA_CRC_TEST:
|
|
op = IOAT_OP_MOVECRC_TEST;
|
|
break;
|
|
default:
|
|
KASSERT(teststore == 0, ("bogus"));
|
|
op = IOAT_OP_MOVECRC;
|
|
break;
|
|
}
|
|
|
|
if ((flags & DMA_CRC_INLINE) == 0 &&
|
|
(crcptr & (0xffffffull << 40)) != 0) {
|
|
ioat_log_message(0,
|
|
"%s: High 24 bits of crcptr invalid\n", __func__);
|
|
return (NULL);
|
|
}
|
|
|
|
desc = ioat_op_generic(ioat, op, len, src, dst, callback_fn,
|
|
callback_arg, flags & ~_DMA_CRC_FLAGS);
|
|
if (desc == NULL)
|
|
return (NULL);
|
|
|
|
hw_desc = desc->u.crc32;
|
|
|
|
if ((flags & DMA_CRC_INLINE) == 0)
|
|
hw_desc->crc_address = crcptr;
|
|
else
|
|
hw_desc->u.control.crc_location = 1;
|
|
|
|
if (initialseed != NULL) {
|
|
hw_desc->u.control.use_seed = 1;
|
|
hw_desc->seed = *initialseed;
|
|
}
|
|
|
|
if (g_ioat_debug_level >= 3)
|
|
dump_descriptor(hw_desc);
|
|
|
|
ioat_submit_single(ioat);
|
|
return (&desc->bus_dmadesc);
|
|
}
|
|
|
|
struct bus_dmadesc *
|
|
ioat_crc(bus_dmaengine_t dmaengine, bus_addr_t src, bus_size_t len,
|
|
uint32_t *initialseed, bus_addr_t crcptr,
|
|
bus_dmaengine_callback_t callback_fn, void *callback_arg, uint32_t flags)
|
|
{
|
|
struct ioat_crc32_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
struct ioat_softc *ioat;
|
|
uint32_t teststore;
|
|
uint8_t op;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
ioat = to_ioat_softc(dmaengine);
|
|
|
|
if ((ioat->capabilities & IOAT_DMACAP_CRC) == 0) {
|
|
ioat_log_message(0, "%s: Device lacks CRC capability\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
if ((src & (0xffffffull << 40)) != 0) {
|
|
ioat_log_message(0, "%s: High 24 bits of src invalid\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
teststore = (flags & _DMA_CRC_TESTSTORE);
|
|
if (teststore == _DMA_CRC_TESTSTORE) {
|
|
ioat_log_message(0, "%s: TEST and STORE invalid\n", __func__);
|
|
return (NULL);
|
|
}
|
|
if (teststore == 0 && (flags & DMA_CRC_INLINE) != 0) {
|
|
ioat_log_message(0, "%s: INLINE invalid without TEST or STORE\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
|
|
switch (teststore) {
|
|
case DMA_CRC_STORE:
|
|
op = IOAT_OP_CRC_STORE;
|
|
break;
|
|
case DMA_CRC_TEST:
|
|
op = IOAT_OP_CRC_TEST;
|
|
break;
|
|
default:
|
|
KASSERT(teststore == 0, ("bogus"));
|
|
op = IOAT_OP_CRC;
|
|
break;
|
|
}
|
|
|
|
if ((flags & DMA_CRC_INLINE) == 0 &&
|
|
(crcptr & (0xffffffull << 40)) != 0) {
|
|
ioat_log_message(0,
|
|
"%s: High 24 bits of crcptr invalid\n", __func__);
|
|
return (NULL);
|
|
}
|
|
|
|
desc = ioat_op_generic(ioat, op, len, src, 0, callback_fn,
|
|
callback_arg, flags & ~_DMA_CRC_FLAGS);
|
|
if (desc == NULL)
|
|
return (NULL);
|
|
|
|
hw_desc = desc->u.crc32;
|
|
|
|
if ((flags & DMA_CRC_INLINE) == 0)
|
|
hw_desc->crc_address = crcptr;
|
|
else
|
|
hw_desc->u.control.crc_location = 1;
|
|
|
|
if (initialseed != NULL) {
|
|
hw_desc->u.control.use_seed = 1;
|
|
hw_desc->seed = *initialseed;
|
|
}
|
|
|
|
if (g_ioat_debug_level >= 3)
|
|
dump_descriptor(hw_desc);
|
|
|
|
ioat_submit_single(ioat);
|
|
return (&desc->bus_dmadesc);
|
|
}
|
|
|
|
struct bus_dmadesc *
|
|
ioat_blockfill(bus_dmaengine_t dmaengine, bus_addr_t dst, uint64_t fillpattern,
|
|
bus_size_t len, bus_dmaengine_callback_t callback_fn, void *callback_arg,
|
|
uint32_t flags)
|
|
{
|
|
struct ioat_fill_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
struct ioat_softc *ioat;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
ioat = to_ioat_softc(dmaengine);
|
|
|
|
if ((ioat->capabilities & IOAT_DMACAP_BFILL) == 0) {
|
|
ioat_log_message(0, "%s: Device lacks BFILL capability\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
|
|
if ((dst & (0xffffull << 48)) != 0) {
|
|
ioat_log_message(0, "%s: High 16 bits of dst invalid\n",
|
|
__func__);
|
|
return (NULL);
|
|
}
|
|
|
|
desc = ioat_op_generic(ioat, IOAT_OP_FILL, len, fillpattern, dst,
|
|
callback_fn, callback_arg, flags);
|
|
if (desc == NULL)
|
|
return (NULL);
|
|
|
|
hw_desc = desc->u.fill;
|
|
if (g_ioat_debug_level >= 3)
|
|
dump_descriptor(hw_desc);
|
|
|
|
ioat_submit_single(ioat);
|
|
return (&desc->bus_dmadesc);
|
|
}
|
|
|
|
/*
|
|
* Ring Management
|
|
*/
|
|
static inline uint32_t
|
|
ioat_get_active(struct ioat_softc *ioat)
|
|
{
|
|
|
|
return ((ioat->head - ioat->tail) & ((1 << ioat->ring_size_order) - 1));
|
|
}
|
|
|
|
static inline uint32_t
|
|
ioat_get_ring_space(struct ioat_softc *ioat)
|
|
{
|
|
|
|
return ((1 << ioat->ring_size_order) - ioat_get_active(ioat) - 1);
|
|
}
|
|
|
|
static struct ioat_descriptor *
|
|
ioat_alloc_ring_entry(struct ioat_softc *ioat, int mflags)
|
|
{
|
|
struct ioat_generic_hw_descriptor *hw_desc;
|
|
struct ioat_descriptor *desc;
|
|
int error, busdmaflag;
|
|
|
|
error = ENOMEM;
|
|
hw_desc = NULL;
|
|
|
|
if ((mflags & M_WAITOK) != 0)
|
|
busdmaflag = BUS_DMA_WAITOK;
|
|
else
|
|
busdmaflag = BUS_DMA_NOWAIT;
|
|
|
|
desc = malloc(sizeof(*desc), M_IOAT, mflags);
|
|
if (desc == NULL)
|
|
goto out;
|
|
|
|
bus_dmamem_alloc(ioat->hw_desc_tag, (void **)&hw_desc,
|
|
BUS_DMA_ZERO | busdmaflag, &ioat->hw_desc_map);
|
|
if (hw_desc == NULL)
|
|
goto out;
|
|
|
|
memset(&desc->bus_dmadesc, 0, sizeof(desc->bus_dmadesc));
|
|
desc->u.generic = hw_desc;
|
|
|
|
error = bus_dmamap_load(ioat->hw_desc_tag, ioat->hw_desc_map, hw_desc,
|
|
sizeof(*hw_desc), ioat_dmamap_cb, &desc->hw_desc_bus_addr,
|
|
busdmaflag);
|
|
if (error)
|
|
goto out;
|
|
|
|
out:
|
|
if (error) {
|
|
ioat_free_ring_entry(ioat, desc);
|
|
return (NULL);
|
|
}
|
|
return (desc);
|
|
}
|
|
|
|
static void
|
|
ioat_free_ring_entry(struct ioat_softc *ioat, struct ioat_descriptor *desc)
|
|
{
|
|
|
|
if (desc == NULL)
|
|
return;
|
|
|
|
if (desc->u.generic)
|
|
bus_dmamem_free(ioat->hw_desc_tag, desc->u.generic,
|
|
ioat->hw_desc_map);
|
|
free(desc, M_IOAT);
|
|
}
|
|
|
|
/*
|
|
* Reserves space in this IOAT descriptor ring by ensuring enough slots remain
|
|
* for 'num_descs'.
|
|
*
|
|
* If mflags contains M_WAITOK, blocks until enough space is available.
|
|
*
|
|
* Returns zero on success, or an errno on error. If num_descs is beyond the
|
|
* maximum ring size, returns EINVAl; if allocation would block and mflags
|
|
* contains M_NOWAIT, returns EAGAIN.
|
|
*
|
|
* Must be called with the submit_lock held; returns with the lock held. The
|
|
* lock may be dropped to allocate the ring.
|
|
*
|
|
* (The submit_lock is needed to add any entries to the ring, so callers are
|
|
* assured enough room is available.)
|
|
*/
|
|
static int
|
|
ioat_reserve_space(struct ioat_softc *ioat, uint32_t num_descs, int mflags)
|
|
{
|
|
struct ioat_descriptor **new_ring;
|
|
uint32_t order;
|
|
int error;
|
|
|
|
mtx_assert(&ioat->submit_lock, MA_OWNED);
|
|
error = 0;
|
|
|
|
if (num_descs < 1 || num_descs > (1 << IOAT_MAX_ORDER)) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (ioat->quiescing) {
|
|
error = ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
for (;;) {
|
|
if (ioat_get_ring_space(ioat) >= num_descs)
|
|
goto out;
|
|
|
|
order = ioat->ring_size_order;
|
|
if (ioat->is_resize_pending || order == IOAT_MAX_ORDER) {
|
|
if ((mflags & M_WAITOK) != 0) {
|
|
msleep(&ioat->tail, &ioat->submit_lock, 0,
|
|
"ioat_rsz", 0);
|
|
continue;
|
|
}
|
|
|
|
error = EAGAIN;
|
|
break;
|
|
}
|
|
|
|
ioat->is_resize_pending = TRUE;
|
|
for (;;) {
|
|
mtx_unlock(&ioat->submit_lock);
|
|
|
|
new_ring = ioat_prealloc_ring(ioat, 1 << (order + 1),
|
|
TRUE, mflags);
|
|
|
|
mtx_lock(&ioat->submit_lock);
|
|
KASSERT(ioat->ring_size_order == order,
|
|
("is_resize_pending should protect order"));
|
|
|
|
if (new_ring == NULL) {
|
|
KASSERT((mflags & M_WAITOK) == 0,
|
|
("allocation failed"));
|
|
error = EAGAIN;
|
|
break;
|
|
}
|
|
|
|
error = ring_grow(ioat, order, new_ring);
|
|
if (error == 0)
|
|
break;
|
|
}
|
|
ioat->is_resize_pending = FALSE;
|
|
wakeup(&ioat->tail);
|
|
if (error)
|
|
break;
|
|
}
|
|
|
|
out:
|
|
mtx_assert(&ioat->submit_lock, MA_OWNED);
|
|
return (error);
|
|
}
|
|
|
|
static struct ioat_descriptor **
|
|
ioat_prealloc_ring(struct ioat_softc *ioat, uint32_t size, boolean_t need_dscr,
|
|
int mflags)
|
|
{
|
|
struct ioat_descriptor **ring;
|
|
uint32_t i;
|
|
int error;
|
|
|
|
KASSERT(size > 0 && powerof2(size), ("bogus size"));
|
|
|
|
ring = malloc(size * sizeof(*ring), M_IOAT, M_ZERO | mflags);
|
|
if (ring == NULL)
|
|
return (NULL);
|
|
|
|
if (need_dscr) {
|
|
error = ENOMEM;
|
|
for (i = size / 2; i < size; i++) {
|
|
ring[i] = ioat_alloc_ring_entry(ioat, mflags);
|
|
if (ring[i] == NULL)
|
|
goto out;
|
|
ring[i]->id = i;
|
|
}
|
|
}
|
|
error = 0;
|
|
|
|
out:
|
|
if (error != 0 && ring != NULL) {
|
|
ioat_free_ring(ioat, size, ring);
|
|
ring = NULL;
|
|
}
|
|
return (ring);
|
|
}
|
|
|
|
static void
|
|
ioat_free_ring(struct ioat_softc *ioat, uint32_t size,
|
|
struct ioat_descriptor **ring)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
if (ring[i] != NULL)
|
|
ioat_free_ring_entry(ioat, ring[i]);
|
|
}
|
|
free(ring, M_IOAT);
|
|
}
|
|
|
|
static struct ioat_descriptor *
|
|
ioat_get_ring_entry(struct ioat_softc *ioat, uint32_t index)
|
|
{
|
|
|
|
return (ioat->ring[index % (1 << ioat->ring_size_order)]);
|
|
}
|
|
|
|
static int
|
|
ring_grow(struct ioat_softc *ioat, uint32_t oldorder,
|
|
struct ioat_descriptor **newring)
|
|
{
|
|
struct ioat_descriptor *tmp, *next;
|
|
struct ioat_dma_hw_descriptor *hw;
|
|
uint32_t oldsize, newsize, head, tail, i, end;
|
|
int error;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
|
|
mtx_assert(&ioat->submit_lock, MA_OWNED);
|
|
|
|
if (oldorder != ioat->ring_size_order || oldorder >= IOAT_MAX_ORDER) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
oldsize = (1 << oldorder);
|
|
newsize = (1 << (oldorder + 1));
|
|
|
|
mtx_lock(&ioat->cleanup_lock);
|
|
|
|
head = ioat->head & (oldsize - 1);
|
|
tail = ioat->tail & (oldsize - 1);
|
|
|
|
/* Copy old descriptors to new ring */
|
|
for (i = 0; i < oldsize; i++)
|
|
newring[i] = ioat->ring[i];
|
|
|
|
/*
|
|
* If head has wrapped but tail hasn't, we must swap some descriptors
|
|
* around so that tail can increment directly to head.
|
|
*/
|
|
if (head < tail) {
|
|
for (i = 0; i <= head; i++) {
|
|
tmp = newring[oldsize + i];
|
|
|
|
newring[oldsize + i] = newring[i];
|
|
newring[oldsize + i]->id = oldsize + i;
|
|
|
|
newring[i] = tmp;
|
|
newring[i]->id = i;
|
|
}
|
|
head += oldsize;
|
|
}
|
|
|
|
KASSERT(head >= tail, ("invariants"));
|
|
|
|
/* Head didn't wrap; we only need to link in oldsize..newsize */
|
|
if (head < oldsize) {
|
|
i = oldsize - 1;
|
|
end = newsize;
|
|
} else {
|
|
/* Head did wrap; link newhead..newsize and 0..oldhead */
|
|
i = head;
|
|
end = newsize + (head - oldsize) + 1;
|
|
}
|
|
|
|
/*
|
|
* Fix up hardware ring, being careful not to trample the active
|
|
* section (tail -> head).
|
|
*/
|
|
for (; i < end; i++) {
|
|
KASSERT((i & (newsize - 1)) < tail ||
|
|
(i & (newsize - 1)) >= head, ("trampling snake"));
|
|
|
|
next = newring[(i + 1) & (newsize - 1)];
|
|
hw = newring[i & (newsize - 1)]->u.dma;
|
|
hw->next = next->hw_desc_bus_addr;
|
|
}
|
|
|
|
free(ioat->ring, M_IOAT);
|
|
ioat->ring = newring;
|
|
ioat->ring_size_order = oldorder + 1;
|
|
ioat->tail = tail;
|
|
ioat->head = head;
|
|
error = 0;
|
|
|
|
mtx_unlock(&ioat->cleanup_lock);
|
|
out:
|
|
if (error)
|
|
ioat_free_ring(ioat, (1 << (oldorder + 1)), newring);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
ring_shrink(struct ioat_softc *ioat, uint32_t oldorder,
|
|
struct ioat_descriptor **newring)
|
|
{
|
|
struct ioat_dma_hw_descriptor *hw;
|
|
struct ioat_descriptor *ent, *next;
|
|
uint32_t oldsize, newsize, current_idx, new_idx, i;
|
|
int error;
|
|
|
|
CTR0(KTR_IOAT, __func__);
|
|
|
|
mtx_assert(&ioat->submit_lock, MA_OWNED);
|
|
|
|
if (oldorder != ioat->ring_size_order || oldorder <= IOAT_MIN_ORDER) {
|
|
error = EINVAL;
|
|
goto out_unlocked;
|
|
}
|
|
|
|
oldsize = (1 << oldorder);
|
|
newsize = (1 << (oldorder - 1));
|
|
|
|
mtx_lock(&ioat->cleanup_lock);
|
|
|
|
/* Can't shrink below current active set! */
|
|
if (ioat_get_active(ioat) >= newsize) {
|
|
error = ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Copy current descriptors to the new ring, dropping the removed
|
|
* descriptors.
|
|
*/
|
|
for (i = 0; i < newsize; i++) {
|
|
current_idx = (ioat->tail + i) & (oldsize - 1);
|
|
new_idx = (ioat->tail + i) & (newsize - 1);
|
|
|
|
newring[new_idx] = ioat->ring[current_idx];
|
|
newring[new_idx]->id = new_idx;
|
|
}
|
|
|
|
/* Free deleted descriptors */
|
|
for (i = newsize; i < oldsize; i++) {
|
|
ent = ioat_get_ring_entry(ioat, ioat->tail + i);
|
|
ioat_free_ring_entry(ioat, ent);
|
|
}
|
|
|
|
/* Fix up hardware ring. */
|
|
hw = newring[(ioat->tail + newsize - 1) & (newsize - 1)]->u.dma;
|
|
next = newring[(ioat->tail + newsize) & (newsize - 1)];
|
|
hw->next = next->hw_desc_bus_addr;
|
|
|
|
free(ioat->ring, M_IOAT);
|
|
ioat->ring = newring;
|
|
ioat->ring_size_order = oldorder - 1;
|
|
error = 0;
|
|
|
|
out:
|
|
mtx_unlock(&ioat->cleanup_lock);
|
|
out_unlocked:
|
|
if (error)
|
|
ioat_free_ring(ioat, (1 << (oldorder - 1)), newring);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
ioat_halted_debug(struct ioat_softc *ioat, uint32_t chanerr)
|
|
{
|
|
struct ioat_descriptor *desc;
|
|
|
|
ioat_log_message(0, "Channel halted (%b)\n", (int)chanerr,
|
|
IOAT_CHANERR_STR);
|
|
if (chanerr == 0)
|
|
return;
|
|
|
|
mtx_assert(&ioat->cleanup_lock, MA_OWNED);
|
|
|
|
desc = ioat_get_ring_entry(ioat, ioat->tail + 0);
|
|
dump_descriptor(desc->u.raw);
|
|
|
|
desc = ioat_get_ring_entry(ioat, ioat->tail + 1);
|
|
dump_descriptor(desc->u.raw);
|
|
}
|
|
|
|
static void
|
|
ioat_timer_callback(void *arg)
|
|
{
|
|
struct ioat_descriptor **newring;
|
|
struct ioat_softc *ioat;
|
|
uint32_t order;
|
|
|
|
ioat = arg;
|
|
ioat_log_message(1, "%s\n", __func__);
|
|
|
|
if (ioat->is_completion_pending) {
|
|
ioat_process_events(ioat);
|
|
return;
|
|
}
|
|
|
|
/* Slowly scale the ring down if idle. */
|
|
mtx_lock(&ioat->submit_lock);
|
|
order = ioat->ring_size_order;
|
|
if (ioat->is_resize_pending || order == IOAT_MIN_ORDER) {
|
|
mtx_unlock(&ioat->submit_lock);
|
|
goto out;
|
|
}
|
|
ioat->is_resize_pending = TRUE;
|
|
mtx_unlock(&ioat->submit_lock);
|
|
|
|
newring = ioat_prealloc_ring(ioat, 1 << (order - 1), FALSE,
|
|
M_NOWAIT);
|
|
|
|
mtx_lock(&ioat->submit_lock);
|
|
KASSERT(ioat->ring_size_order == order,
|
|
("resize_pending protects order"));
|
|
|
|
if (newring != NULL)
|
|
ring_shrink(ioat, order, newring);
|
|
|
|
ioat->is_resize_pending = FALSE;
|
|
mtx_unlock(&ioat->submit_lock);
|
|
|
|
out:
|
|
if (ioat->ring_size_order > IOAT_MIN_ORDER)
|
|
callout_reset(&ioat->timer, 10 * hz,
|
|
ioat_timer_callback, ioat);
|
|
}
|
|
|
|
/*
|
|
* Support Functions
|
|
*/
|
|
static void
|
|
ioat_submit_single(struct ioat_softc *ioat)
|
|
{
|
|
|
|
ioat_get(ioat, IOAT_ACTIVE_DESCR_REF);
|
|
atomic_add_rel_int(&ioat->head, 1);
|
|
atomic_add_rel_int(&ioat->hw_head, 1);
|
|
|
|
if (!ioat->is_completion_pending) {
|
|
ioat->is_completion_pending = TRUE;
|
|
callout_reset(&ioat->timer, IOAT_INTR_TIMO,
|
|
ioat_timer_callback, ioat);
|
|
}
|
|
|
|
ioat->stats.descriptors_submitted++;
|
|
}
|
|
|
|
static int
|
|
ioat_reset_hw(struct ioat_softc *ioat)
|
|
{
|
|
uint64_t status;
|
|
uint32_t chanerr;
|
|
unsigned timeout;
|
|
int error;
|
|
|
|
mtx_lock(IOAT_REFLK);
|
|
ioat->quiescing = TRUE;
|
|
ioat_drain_locked(ioat);
|
|
mtx_unlock(IOAT_REFLK);
|
|
|
|
status = ioat_get_chansts(ioat);
|
|
if (is_ioat_active(status) || is_ioat_idle(status))
|
|
ioat_suspend(ioat);
|
|
|
|
/* Wait at most 20 ms */
|
|
for (timeout = 0; (is_ioat_active(status) || is_ioat_idle(status)) &&
|
|
timeout < 20; timeout++) {
|
|
DELAY(1000);
|
|
status = ioat_get_chansts(ioat);
|
|
}
|
|
if (timeout == 20) {
|
|
error = ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
|
|
KASSERT(ioat_get_active(ioat) == 0, ("active after quiesce"));
|
|
|
|
chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET);
|
|
ioat_write_4(ioat, IOAT_CHANERR_OFFSET, chanerr);
|
|
|
|
/*
|
|
* IOAT v3 workaround - CHANERRMSK_INT with 3E07h to masks out errors
|
|
* that can cause stability issues for IOAT v3.
|
|
*/
|
|
pci_write_config(ioat->device, IOAT_CFG_CHANERRMASK_INT_OFFSET, 0x3e07,
|
|
4);
|
|
chanerr = pci_read_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, 4);
|
|
pci_write_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, chanerr, 4);
|
|
|
|
/*
|
|
* BDXDE and BWD models reset MSI-X registers on device reset.
|
|
* Save/restore their contents manually.
|
|
*/
|
|
if (ioat_model_resets_msix(ioat)) {
|
|
ioat_log_message(1, "device resets MSI-X registers; saving\n");
|
|
pci_save_state(ioat->device);
|
|
}
|
|
|
|
ioat_reset(ioat);
|
|
|
|
/* Wait at most 20 ms */
|
|
for (timeout = 0; ioat_reset_pending(ioat) && timeout < 20; timeout++)
|
|
DELAY(1000);
|
|
if (timeout == 20) {
|
|
error = ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
|
|
if (ioat_model_resets_msix(ioat)) {
|
|
ioat_log_message(1, "device resets registers; restored\n");
|
|
pci_restore_state(ioat->device);
|
|
}
|
|
|
|
/* Reset attempts to return the hardware to "halted." */
|
|
status = ioat_get_chansts(ioat);
|
|
if (is_ioat_active(status) || is_ioat_idle(status)) {
|
|
/* So this really shouldn't happen... */
|
|
ioat_log_message(0, "Device is active after a reset?\n");
|
|
ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN);
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
|
|
chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET);
|
|
if (chanerr != 0) {
|
|
mtx_lock(&ioat->cleanup_lock);
|
|
ioat_halted_debug(ioat, chanerr);
|
|
mtx_unlock(&ioat->cleanup_lock);
|
|
error = EIO;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Bring device back online after reset. Writing CHAINADDR brings the
|
|
* device back to active.
|
|
*
|
|
* The internal ring counter resets to zero, so we have to start over
|
|
* at zero as well.
|
|
*/
|
|
ioat->tail = ioat->head = ioat->hw_head = 0;
|
|
ioat->last_seen = 0;
|
|
|
|
ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN);
|
|
ioat_write_chancmp(ioat, ioat->comp_update_bus_addr);
|
|
ioat_write_chainaddr(ioat, ioat->ring[0]->hw_desc_bus_addr);
|
|
error = 0;
|
|
|
|
out:
|
|
mtx_lock(IOAT_REFLK);
|
|
ioat->quiescing = FALSE;
|
|
wakeup(&ioat->quiescing);
|
|
mtx_unlock(IOAT_REFLK);
|
|
|
|
if (error == 0)
|
|
error = ioat_start_channel(ioat);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sysctl_handle_chansts(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
struct sbuf sb;
|
|
uint64_t status;
|
|
int error;
|
|
|
|
ioat = arg1;
|
|
|
|
status = ioat_get_chansts(ioat) & IOAT_CHANSTS_STATUS;
|
|
|
|
sbuf_new_for_sysctl(&sb, NULL, 256, req);
|
|
switch (status) {
|
|
case IOAT_CHANSTS_ACTIVE:
|
|
sbuf_printf(&sb, "ACTIVE");
|
|
break;
|
|
case IOAT_CHANSTS_IDLE:
|
|
sbuf_printf(&sb, "IDLE");
|
|
break;
|
|
case IOAT_CHANSTS_SUSPENDED:
|
|
sbuf_printf(&sb, "SUSPENDED");
|
|
break;
|
|
case IOAT_CHANSTS_HALTED:
|
|
sbuf_printf(&sb, "HALTED");
|
|
break;
|
|
case IOAT_CHANSTS_ARMED:
|
|
sbuf_printf(&sb, "ARMED");
|
|
break;
|
|
default:
|
|
sbuf_printf(&sb, "UNKNOWN");
|
|
break;
|
|
}
|
|
error = sbuf_finish(&sb);
|
|
sbuf_delete(&sb);
|
|
|
|
if (error != 0 || req->newptr == NULL)
|
|
return (error);
|
|
return (EINVAL);
|
|
}
|
|
|
|
static int
|
|
sysctl_handle_dpi(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
struct sbuf sb;
|
|
#define PRECISION "1"
|
|
const uintmax_t factor = 10;
|
|
uintmax_t rate;
|
|
int error;
|
|
|
|
ioat = arg1;
|
|
sbuf_new_for_sysctl(&sb, NULL, 16, req);
|
|
|
|
if (ioat->stats.interrupts == 0) {
|
|
sbuf_printf(&sb, "NaN");
|
|
goto out;
|
|
}
|
|
rate = ioat->stats.descriptors_processed * factor /
|
|
ioat->stats.interrupts;
|
|
sbuf_printf(&sb, "%ju.%." PRECISION "ju", rate / factor,
|
|
rate % factor);
|
|
#undef PRECISION
|
|
out:
|
|
error = sbuf_finish(&sb);
|
|
sbuf_delete(&sb);
|
|
if (error != 0 || req->newptr == NULL)
|
|
return (error);
|
|
return (EINVAL);
|
|
}
|
|
|
|
static int
|
|
sysctl_handle_error(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct ioat_descriptor *desc;
|
|
struct ioat_softc *ioat;
|
|
int error, arg;
|
|
|
|
ioat = arg1;
|
|
|
|
arg = 0;
|
|
error = SYSCTL_OUT(req, &arg, sizeof(arg));
|
|
if (error != 0 || req->newptr == NULL)
|
|
return (error);
|
|
|
|
error = SYSCTL_IN(req, &arg, sizeof(arg));
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (arg != 0) {
|
|
ioat_acquire(&ioat->dmaengine);
|
|
desc = ioat_op_generic(ioat, IOAT_OP_COPY, 1,
|
|
0xffff000000000000ull, 0xffff000000000000ull, NULL, NULL,
|
|
0);
|
|
if (desc == NULL)
|
|
error = ENOMEM;
|
|
else
|
|
ioat_submit_single(ioat);
|
|
ioat_release(&ioat->dmaengine);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
sysctl_handle_reset(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct ioat_softc *ioat;
|
|
int error, arg;
|
|
|
|
ioat = arg1;
|
|
|
|
arg = 0;
|
|
error = SYSCTL_OUT(req, &arg, sizeof(arg));
|
|
if (error != 0 || req->newptr == NULL)
|
|
return (error);
|
|
|
|
error = SYSCTL_IN(req, &arg, sizeof(arg));
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
if (arg != 0)
|
|
error = ioat_reset_hw(ioat);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
dump_descriptor(void *hw_desc)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
for (j = 0; j < 8; j++)
|
|
printf("%08x ", ((uint32_t *)hw_desc)[i * 8 + j]);
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
static void
|
|
ioat_setup_sysctl(device_t device)
|
|
{
|
|
struct sysctl_oid_list *par, *statpar, *state, *hammer;
|
|
struct sysctl_ctx_list *ctx;
|
|
struct sysctl_oid *tree, *tmp;
|
|
struct ioat_softc *ioat;
|
|
|
|
ioat = DEVICE2SOFTC(device);
|
|
ctx = device_get_sysctl_ctx(device);
|
|
tree = device_get_sysctl_tree(device);
|
|
par = SYSCTL_CHILDREN(tree);
|
|
|
|
SYSCTL_ADD_INT(ctx, par, OID_AUTO, "version", CTLFLAG_RD,
|
|
&ioat->version, 0, "HW version (0xMM form)");
|
|
SYSCTL_ADD_UINT(ctx, par, OID_AUTO, "max_xfer_size", CTLFLAG_RD,
|
|
&ioat->max_xfer_size, 0, "HW maximum transfer size");
|
|
SYSCTL_ADD_INT(ctx, par, OID_AUTO, "intrdelay_supported", CTLFLAG_RD,
|
|
&ioat->intrdelay_supported, 0, "Is INTRDELAY supported");
|
|
SYSCTL_ADD_U16(ctx, par, OID_AUTO, "intrdelay_max", CTLFLAG_RD,
|
|
&ioat->intrdelay_max, 0,
|
|
"Maximum configurable INTRDELAY on this channel (microseconds)");
|
|
|
|
tmp = SYSCTL_ADD_NODE(ctx, par, OID_AUTO, "state", CTLFLAG_RD, NULL,
|
|
"IOAT channel internal state");
|
|
state = SYSCTL_CHILDREN(tmp);
|
|
|
|
SYSCTL_ADD_UINT(ctx, state, OID_AUTO, "ring_size_order", CTLFLAG_RD,
|
|
&ioat->ring_size_order, 0, "SW descriptor ring size order");
|
|
SYSCTL_ADD_UINT(ctx, state, OID_AUTO, "head", CTLFLAG_RD, &ioat->head,
|
|
0, "SW descriptor head pointer index");
|
|
SYSCTL_ADD_UINT(ctx, state, OID_AUTO, "tail", CTLFLAG_RD, &ioat->tail,
|
|
0, "SW descriptor tail pointer index");
|
|
SYSCTL_ADD_UINT(ctx, state, OID_AUTO, "hw_head", CTLFLAG_RD,
|
|
&ioat->hw_head, 0, "HW DMACOUNT");
|
|
|
|
SYSCTL_ADD_UQUAD(ctx, state, OID_AUTO, "last_completion", CTLFLAG_RD,
|
|
ioat->comp_update, "HW addr of last completion");
|
|
|
|
SYSCTL_ADD_INT(ctx, state, OID_AUTO, "is_resize_pending", CTLFLAG_RD,
|
|
&ioat->is_resize_pending, 0, "resize pending");
|
|
SYSCTL_ADD_INT(ctx, state, OID_AUTO, "is_completion_pending",
|
|
CTLFLAG_RD, &ioat->is_completion_pending, 0, "completion pending");
|
|
SYSCTL_ADD_INT(ctx, state, OID_AUTO, "is_reset_pending", CTLFLAG_RD,
|
|
&ioat->is_reset_pending, 0, "reset pending");
|
|
SYSCTL_ADD_INT(ctx, state, OID_AUTO, "is_channel_running", CTLFLAG_RD,
|
|
&ioat->is_channel_running, 0, "channel running");
|
|
|
|
SYSCTL_ADD_PROC(ctx, state, OID_AUTO, "chansts",
|
|
CTLTYPE_STRING | CTLFLAG_RD, ioat, 0, sysctl_handle_chansts, "A",
|
|
"String of the channel status");
|
|
|
|
SYSCTL_ADD_U16(ctx, state, OID_AUTO, "intrdelay", CTLFLAG_RD,
|
|
&ioat->cached_intrdelay, 0,
|
|
"Current INTRDELAY on this channel (cached, microseconds)");
|
|
|
|
tmp = SYSCTL_ADD_NODE(ctx, par, OID_AUTO, "hammer", CTLFLAG_RD, NULL,
|
|
"Big hammers (mostly for testing)");
|
|
hammer = SYSCTL_CHILDREN(tmp);
|
|
|
|
SYSCTL_ADD_PROC(ctx, hammer, OID_AUTO, "force_hw_reset",
|
|
CTLTYPE_INT | CTLFLAG_RW, ioat, 0, sysctl_handle_reset, "I",
|
|
"Set to non-zero to reset the hardware");
|
|
SYSCTL_ADD_PROC(ctx, hammer, OID_AUTO, "force_hw_error",
|
|
CTLTYPE_INT | CTLFLAG_RW, ioat, 0, sysctl_handle_error, "I",
|
|
"Set to non-zero to inject a recoverable hardware error");
|
|
|
|
tmp = SYSCTL_ADD_NODE(ctx, par, OID_AUTO, "stats", CTLFLAG_RD, NULL,
|
|
"IOAT channel statistics");
|
|
statpar = SYSCTL_CHILDREN(tmp);
|
|
|
|
SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "interrupts", CTLFLAG_RW,
|
|
&ioat->stats.interrupts,
|
|
"Number of interrupts processed on this channel");
|
|
SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "descriptors", CTLFLAG_RW,
|
|
&ioat->stats.descriptors_processed,
|
|
"Number of descriptors processed on this channel");
|
|
SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "submitted", CTLFLAG_RW,
|
|
&ioat->stats.descriptors_submitted,
|
|
"Number of descriptors submitted to this channel");
|
|
SYSCTL_ADD_UQUAD(ctx, statpar, OID_AUTO, "errored", CTLFLAG_RW,
|
|
&ioat->stats.descriptors_error,
|
|
"Number of descriptors failed by channel errors");
|
|
SYSCTL_ADD_U32(ctx, statpar, OID_AUTO, "halts", CTLFLAG_RW,
|
|
&ioat->stats.channel_halts, 0,
|
|
"Number of times the channel has halted");
|
|
SYSCTL_ADD_U32(ctx, statpar, OID_AUTO, "last_halt_chanerr", CTLFLAG_RW,
|
|
&ioat->stats.last_halt_chanerr, 0,
|
|
"The raw CHANERR when the channel was last halted");
|
|
|
|
SYSCTL_ADD_PROC(ctx, statpar, OID_AUTO, "desc_per_interrupt",
|
|
CTLTYPE_STRING | CTLFLAG_RD, ioat, 0, sysctl_handle_dpi, "A",
|
|
"Descriptors per interrupt");
|
|
}
|
|
|
|
static inline struct ioat_softc *
|
|
ioat_get(struct ioat_softc *ioat, enum ioat_ref_kind kind)
|
|
{
|
|
uint32_t old;
|
|
|
|
KASSERT(kind < IOAT_NUM_REF_KINDS, ("bogus"));
|
|
|
|
old = atomic_fetchadd_32(&ioat->refcnt, 1);
|
|
KASSERT(old < UINT32_MAX, ("refcnt overflow"));
|
|
|
|
#ifdef INVARIANTS
|
|
old = atomic_fetchadd_32(&ioat->refkinds[kind], 1);
|
|
KASSERT(old < UINT32_MAX, ("refcnt kind overflow"));
|
|
#endif
|
|
|
|
return (ioat);
|
|
}
|
|
|
|
static inline void
|
|
ioat_putn(struct ioat_softc *ioat, uint32_t n, enum ioat_ref_kind kind)
|
|
{
|
|
|
|
_ioat_putn(ioat, n, kind, FALSE);
|
|
}
|
|
|
|
static inline void
|
|
ioat_putn_locked(struct ioat_softc *ioat, uint32_t n, enum ioat_ref_kind kind)
|
|
{
|
|
|
|
_ioat_putn(ioat, n, kind, TRUE);
|
|
}
|
|
|
|
static inline void
|
|
_ioat_putn(struct ioat_softc *ioat, uint32_t n, enum ioat_ref_kind kind,
|
|
boolean_t locked)
|
|
{
|
|
uint32_t old;
|
|
|
|
KASSERT(kind < IOAT_NUM_REF_KINDS, ("bogus"));
|
|
|
|
if (n == 0)
|
|
return;
|
|
|
|
#ifdef INVARIANTS
|
|
old = atomic_fetchadd_32(&ioat->refkinds[kind], -n);
|
|
KASSERT(old >= n, ("refcnt kind underflow"));
|
|
#endif
|
|
|
|
/* Skip acquiring the lock if resulting refcnt > 0. */
|
|
for (;;) {
|
|
old = ioat->refcnt;
|
|
if (old <= n)
|
|
break;
|
|
if (atomic_cmpset_32(&ioat->refcnt, old, old - n))
|
|
return;
|
|
}
|
|
|
|
if (locked)
|
|
mtx_assert(IOAT_REFLK, MA_OWNED);
|
|
else
|
|
mtx_lock(IOAT_REFLK);
|
|
|
|
old = atomic_fetchadd_32(&ioat->refcnt, -n);
|
|
KASSERT(old >= n, ("refcnt error"));
|
|
|
|
if (old == n)
|
|
wakeup(IOAT_REFLK);
|
|
if (!locked)
|
|
mtx_unlock(IOAT_REFLK);
|
|
}
|
|
|
|
static inline void
|
|
ioat_put(struct ioat_softc *ioat, enum ioat_ref_kind kind)
|
|
{
|
|
|
|
ioat_putn(ioat, 1, kind);
|
|
}
|
|
|
|
static void
|
|
ioat_drain_locked(struct ioat_softc *ioat)
|
|
{
|
|
|
|
mtx_assert(IOAT_REFLK, MA_OWNED);
|
|
while (ioat->refcnt > 0)
|
|
msleep(IOAT_REFLK, IOAT_REFLK, 0, "ioat_drain", 0);
|
|
}
|