svn commit: r300661 - in stable/10: share/man/man4 sys/conf sys/dev/ioat sys/modules sys/modules/ioat tools/tools/ioat
Alexander Motin
mav at FreeBSD.org
Wed May 25 07:09:55 UTC 2016
Author: mav
Date: Wed May 25 07:09:54 2016
New Revision: 300661
URL: https://svnweb.freebsd.org/changeset/base/300661
Log:
MFC ioat(4) driver in its present state.
Added:
stable/10/sys/dev/ioat/
stable/10/sys/dev/ioat/ioat.c (contents, props changed)
stable/10/sys/dev/ioat/ioat.h (contents, props changed)
stable/10/sys/dev/ioat/ioat_hw.h (contents, props changed)
stable/10/sys/dev/ioat/ioat_internal.h (contents, props changed)
stable/10/sys/dev/ioat/ioat_test.c (contents, props changed)
stable/10/sys/dev/ioat/ioat_test.h (contents, props changed)
stable/10/sys/modules/ioat/
stable/10/sys/modules/ioat/Makefile (contents, props changed)
stable/10/tools/tools/ioat/
stable/10/tools/tools/ioat/Makefile (contents, props changed)
stable/10/tools/tools/ioat/ioatcontrol.8 (contents, props changed)
stable/10/tools/tools/ioat/ioatcontrol.c (contents, props changed)
Modified:
stable/10/share/man/man4/Makefile
stable/10/sys/conf/files.amd64
stable/10/sys/modules/Makefile
Modified: stable/10/share/man/man4/Makefile
==============================================================================
--- stable/10/share/man/man4/Makefile Wed May 25 06:55:53 2016 (r300660)
+++ stable/10/share/man/man4/Makefile Wed May 25 07:09:54 2016 (r300661)
@@ -199,6 +199,7 @@ MAN= aac.4 \
intpm.4 \
intro.4 \
${_io.4} \
+ ${_ioat.4} \
ip.4 \
ip6.4 \
ipfirewall.4 \
@@ -797,6 +798,7 @@ MLINKS+=lindev.4 full.4
.if ${MACHINE_CPUARCH} == "amd64"
_if_ntb.4= if_ntb.4
+_ioat.4= ioat.4
_ntb.4= ntb.4
_ntb_hw.4= ntb_hw.4
_qlxge.4= qlxge.4
Modified: stable/10/sys/conf/files.amd64
==============================================================================
--- stable/10/sys/conf/files.amd64 Wed May 25 06:55:53 2016 (r300660)
+++ stable/10/sys/conf/files.amd64 Wed May 25 07:09:54 2016 (r300661)
@@ -203,6 +203,8 @@ dev/if_ndis/if_ndis_pccard.c optional nd
dev/if_ndis/if_ndis_pci.c optional ndis cardbus | ndis pci
dev/if_ndis/if_ndis_usb.c optional ndis usb
dev/io/iodev.c optional io
+dev/ioat/ioat.c optional ioat pci
+dev/ioat/ioat_test.c optional ioat pci
dev/ipmi/ipmi.c optional ipmi
dev/ipmi/ipmi_acpi.c optional ipmi acpi
dev/ipmi/ipmi_isa.c optional ipmi isa
Added: stable/10/sys/dev/ioat/ioat.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/sys/dev/ioat/ioat.c Wed May 25 07:09:54 2016 (r300661)
@@ -0,0 +1,2091 @@
+/*-
+ * Copyright (C) 2012 Intel Corporation
+ * 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/conf.h>
+#include <sys/ioccom.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/rman.h>
+#include <sys/sbuf.h>
+#include <sys/sysctl.h>
+#include <sys/taskqueue.h>
+#include <sys/time.h>
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <machine/stdarg.h>
+
+#include "ioat.h"
+#include "ioat_hw.h"
+#include "ioat_internal.h"
+
+#ifndef BUS_SPACE_MAXADDR_40BIT
+#define BUS_SPACE_MAXADDR_40BIT 0xFFFFFFFFFFULL
+#endif
+#define IOAT_INTR_TIMO (hz / 10)
+#define IOAT_REFLK (&ioat->submit_lock)
+
+static int ioat_probe(device_t device);
+static int ioat_attach(device_t device);
+static int ioat_detach(device_t device);
+static int ioat_setup_intr(struct ioat_softc *ioat);
+static int ioat_teardown_intr(struct ioat_softc *ioat);
+static int ioat3_attach(device_t device);
+static int ioat_start_channel(struct ioat_softc *ioat);
+static int ioat_map_pci_bar(struct ioat_softc *ioat);
+static void ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg,
+ int error);
+static void ioat_interrupt_handler(void *arg);
+static boolean_t ioat_model_resets_msix(struct ioat_softc *ioat);
+static int chanerr_to_errno(uint32_t);
+static void ioat_process_events(struct ioat_softc *ioat);
+static inline uint32_t ioat_get_active(struct ioat_softc *ioat);
+static inline uint32_t ioat_get_ring_space(struct ioat_softc *ioat);
+static void ioat_free_ring(struct ioat_softc *, uint32_t size,
+ struct ioat_descriptor **);
+static void ioat_free_ring_entry(struct ioat_softc *ioat,
+ struct ioat_descriptor *desc);
+static struct ioat_descriptor *ioat_alloc_ring_entry(struct ioat_softc *,
+ int mflags);
+static int ioat_reserve_space(struct ioat_softc *, uint32_t, int mflags);
+static struct ioat_descriptor *ioat_get_ring_entry(struct ioat_softc *ioat,
+ uint32_t index);
+static struct ioat_descriptor **ioat_prealloc_ring(struct ioat_softc *,
+ uint32_t size, boolean_t need_dscr, int mflags);
+static int ring_grow(struct ioat_softc *, uint32_t oldorder,
+ struct ioat_descriptor **);
+static int ring_shrink(struct ioat_softc *, uint32_t oldorder,
+ struct ioat_descriptor **);
+static void ioat_halted_debug(struct ioat_softc *, uint32_t);
+static void ioat_timer_callback(void *arg);
+static void dump_descriptor(void *hw_desc);
+static void ioat_submit_single(struct ioat_softc *ioat);
+static void ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg,
+ int error);
+static int ioat_reset_hw(struct ioat_softc *ioat);
+static void ioat_reset_hw_task(void *, int);
+static void ioat_setup_sysctl(device_t device);
+static int sysctl_handle_reset(SYSCTL_HANDLER_ARGS);
+static inline struct ioat_softc *ioat_get(struct ioat_softc *,
+ enum ioat_ref_kind);
+static inline void ioat_put(struct ioat_softc *, enum ioat_ref_kind);
+static inline void _ioat_putn(struct ioat_softc *, uint32_t,
+ enum ioat_ref_kind, boolean_t);
+static inline void ioat_putn(struct ioat_softc *, uint32_t,
+ enum ioat_ref_kind);
+static inline void ioat_putn_locked(struct ioat_softc *, uint32_t,
+ enum ioat_ref_kind);
+static void ioat_drain_locked(struct ioat_softc *);
+
+#define ioat_log_message(v, ...) do { \
+ if ((v) <= g_ioat_debug_level) { \
+ device_printf(ioat->device, __VA_ARGS__); \
+ } \
+} while (0)
+
+MALLOC_DEFINE(M_IOAT, "ioat", "ioat driver memory allocations");
+SYSCTL_NODE(_hw, OID_AUTO, ioat, CTLFLAG_RD, 0, "ioat node");
+
+static int g_force_legacy_interrupts;
+SYSCTL_INT(_hw_ioat, OID_AUTO, force_legacy_interrupts, CTLFLAG_RDTUN,
+ &g_force_legacy_interrupts, 0, "Set to non-zero to force MSI-X disabled");
+
+int g_ioat_debug_level = 0;
+SYSCTL_INT(_hw_ioat, OID_AUTO, debug_level, CTLFLAG_RWTUN, &g_ioat_debug_level,
+ 0, "Set log level (0-3) for ioat(4). Higher is more verbose.");
+
+/*
+ * OS <-> Driver interface structures
+ */
+static device_method_t ioat_pci_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, ioat_probe),
+ DEVMETHOD(device_attach, ioat_attach),
+ DEVMETHOD(device_detach, ioat_detach),
+ DEVMETHOD_END
+};
+
+static driver_t ioat_pci_driver = {
+ "ioat",
+ ioat_pci_methods,
+ sizeof(struct ioat_softc),
+};
+
+static devclass_t ioat_devclass;
+DRIVER_MODULE(ioat, pci, ioat_pci_driver, ioat_devclass, 0, 0);
+MODULE_VERSION(ioat, 1);
+
+/*
+ * Private data structures
+ */
+static struct ioat_softc *ioat_channel[IOAT_MAX_CHANNELS];
+static int ioat_channel_index = 0;
+SYSCTL_INT(_hw_ioat, OID_AUTO, channels, CTLFLAG_RD, &ioat_channel_index, 0,
+ "Number of IOAT channels attached");
+
+static struct _pcsid
+{
+ u_int32_t type;
+ const char *desc;
+} pci_ids[] = {
+ { 0x34308086, "TBG IOAT Ch0" },
+ { 0x34318086, "TBG IOAT Ch1" },
+ { 0x34328086, "TBG IOAT Ch2" },
+ { 0x34338086, "TBG IOAT Ch3" },
+ { 0x34298086, "TBG IOAT Ch4" },
+ { 0x342a8086, "TBG IOAT Ch5" },
+ { 0x342b8086, "TBG IOAT Ch6" },
+ { 0x342c8086, "TBG IOAT Ch7" },
+
+ { 0x37108086, "JSF IOAT Ch0" },
+ { 0x37118086, "JSF IOAT Ch1" },
+ { 0x37128086, "JSF IOAT Ch2" },
+ { 0x37138086, "JSF IOAT Ch3" },
+ { 0x37148086, "JSF IOAT Ch4" },
+ { 0x37158086, "JSF IOAT Ch5" },
+ { 0x37168086, "JSF IOAT Ch6" },
+ { 0x37178086, "JSF IOAT Ch7" },
+ { 0x37188086, "JSF IOAT Ch0 (RAID)" },
+ { 0x37198086, "JSF IOAT Ch1 (RAID)" },
+
+ { 0x3c208086, "SNB IOAT Ch0" },
+ { 0x3c218086, "SNB IOAT Ch1" },
+ { 0x3c228086, "SNB IOAT Ch2" },
+ { 0x3c238086, "SNB IOAT Ch3" },
+ { 0x3c248086, "SNB IOAT Ch4" },
+ { 0x3c258086, "SNB IOAT Ch5" },
+ { 0x3c268086, "SNB IOAT Ch6" },
+ { 0x3c278086, "SNB IOAT Ch7" },
+ { 0x3c2e8086, "SNB IOAT Ch0 (RAID)" },
+ { 0x3c2f8086, "SNB IOAT Ch1 (RAID)" },
+
+ { 0x0e208086, "IVB IOAT Ch0" },
+ { 0x0e218086, "IVB IOAT Ch1" },
+ { 0x0e228086, "IVB IOAT Ch2" },
+ { 0x0e238086, "IVB IOAT Ch3" },
+ { 0x0e248086, "IVB IOAT Ch4" },
+ { 0x0e258086, "IVB IOAT Ch5" },
+ { 0x0e268086, "IVB IOAT Ch6" },
+ { 0x0e278086, "IVB IOAT Ch7" },
+ { 0x0e2e8086, "IVB IOAT Ch0 (RAID)" },
+ { 0x0e2f8086, "IVB IOAT Ch1 (RAID)" },
+
+ { 0x2f208086, "HSW IOAT Ch0" },
+ { 0x2f218086, "HSW IOAT Ch1" },
+ { 0x2f228086, "HSW IOAT Ch2" },
+ { 0x2f238086, "HSW IOAT Ch3" },
+ { 0x2f248086, "HSW IOAT Ch4" },
+ { 0x2f258086, "HSW IOAT Ch5" },
+ { 0x2f268086, "HSW IOAT Ch6" },
+ { 0x2f278086, "HSW IOAT Ch7" },
+ { 0x2f2e8086, "HSW IOAT Ch0 (RAID)" },
+ { 0x2f2f8086, "HSW IOAT Ch1 (RAID)" },
+
+ { 0x0c508086, "BWD IOAT Ch0" },
+ { 0x0c518086, "BWD IOAT Ch1" },
+ { 0x0c528086, "BWD IOAT Ch2" },
+ { 0x0c538086, "BWD IOAT Ch3" },
+
+ { 0x6f508086, "BDXDE IOAT Ch0" },
+ { 0x6f518086, "BDXDE IOAT Ch1" },
+ { 0x6f528086, "BDXDE IOAT Ch2" },
+ { 0x6f538086, "BDXDE IOAT Ch3" },
+
+ { 0x6f208086, "BDX IOAT Ch0" },
+ { 0x6f218086, "BDX IOAT Ch1" },
+ { 0x6f228086, "BDX IOAT Ch2" },
+ { 0x6f238086, "BDX IOAT Ch3" },
+ { 0x6f248086, "BDX IOAT Ch4" },
+ { 0x6f258086, "BDX IOAT Ch5" },
+ { 0x6f268086, "BDX IOAT Ch6" },
+ { 0x6f278086, "BDX IOAT Ch7" },
+ { 0x6f2e8086, "BDX IOAT Ch0 (RAID)" },
+ { 0x6f2f8086, "BDX IOAT Ch1 (RAID)" },
+
+ { 0x00000000, NULL }
+};
+
+/*
+ * OS <-> Driver linkage functions
+ */
+static int
+ioat_probe(device_t device)
+{
+ struct _pcsid *ep;
+ u_int32_t type;
+
+ type = pci_get_devid(device);
+ for (ep = pci_ids; ep->type; ep++) {
+ if (ep->type == type) {
+ device_set_desc(device, ep->desc);
+ return (0);
+ }
+ }
+ return (ENXIO);
+}
+
+static int
+ioat_attach(device_t device)
+{
+ struct ioat_softc *ioat;
+ int error;
+
+ ioat = DEVICE2SOFTC(device);
+ ioat->device = device;
+
+ error = ioat_map_pci_bar(ioat);
+ if (error != 0)
+ goto err;
+
+ ioat->version = ioat_read_cbver(ioat);
+ if (ioat->version < IOAT_VER_3_0) {
+ error = ENODEV;
+ goto err;
+ }
+
+ error = ioat3_attach(device);
+ if (error != 0)
+ goto err;
+
+ error = pci_enable_busmaster(device);
+ if (error != 0)
+ goto err;
+
+ error = ioat_setup_intr(ioat);
+ if (error != 0)
+ goto err;
+
+ error = ioat_reset_hw(ioat);
+ if (error != 0)
+ goto err;
+
+ ioat_process_events(ioat);
+ ioat_setup_sysctl(device);
+
+ ioat->chan_idx = ioat_channel_index;
+ ioat_channel[ioat_channel_index++] = ioat;
+ ioat_test_attach();
+
+err:
+ if (error != 0)
+ ioat_detach(device);
+ return (error);
+}
+
+static int
+ioat_detach(device_t device)
+{
+ struct ioat_softc *ioat;
+
+ ioat = DEVICE2SOFTC(device);
+
+ ioat_test_detach();
+ taskqueue_drain(taskqueue_thread, &ioat->reset_task);
+
+ mtx_lock(IOAT_REFLK);
+ ioat->quiescing = TRUE;
+ ioat->destroying = TRUE;
+ wakeup(&ioat->quiescing);
+
+ ioat_channel[ioat->chan_idx] = NULL;
+
+ ioat_drain_locked(ioat);
+ mtx_unlock(IOAT_REFLK);
+
+ ioat_teardown_intr(ioat);
+ callout_drain(&ioat->timer);
+
+ pci_disable_busmaster(device);
+
+ if (ioat->pci_resource != NULL)
+ bus_release_resource(device, SYS_RES_MEMORY,
+ ioat->pci_resource_id, ioat->pci_resource);
+
+ if (ioat->ring != NULL)
+ ioat_free_ring(ioat, 1 << ioat->ring_size_order, ioat->ring);
+
+ if (ioat->comp_update != NULL) {
+ bus_dmamap_unload(ioat->comp_update_tag, ioat->comp_update_map);
+ bus_dmamem_free(ioat->comp_update_tag, ioat->comp_update,
+ ioat->comp_update_map);
+ bus_dma_tag_destroy(ioat->comp_update_tag);
+ }
+
+ bus_dma_tag_destroy(ioat->hw_desc_tag);
+
+ return (0);
+}
+
+static int
+ioat_teardown_intr(struct ioat_softc *ioat)
+{
+
+ if (ioat->tag != NULL)
+ bus_teardown_intr(ioat->device, ioat->res, ioat->tag);
+
+ if (ioat->res != NULL)
+ bus_release_resource(ioat->device, SYS_RES_IRQ,
+ rman_get_rid(ioat->res), ioat->res);
+
+ pci_release_msi(ioat->device);
+ return (0);
+}
+
+static int
+ioat_start_channel(struct ioat_softc *ioat)
+{
+ uint64_t status;
+ uint32_t chanerr;
+ int i;
+
+ ioat_acquire(&ioat->dmaengine);
+ ioat_null(&ioat->dmaengine, NULL, NULL, 0);
+ ioat_release(&ioat->dmaengine);
+
+ for (i = 0; i < 100; i++) {
+ DELAY(1);
+ status = ioat_get_chansts(ioat);
+ if (is_ioat_idle(status))
+ return (0);
+ }
+
+ chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET);
+ ioat_log_message(0, "could not start channel: "
+ "status = %#jx error = %b\n", (uintmax_t)status, (int)chanerr,
+ IOAT_CHANERR_STR);
+ return (ENXIO);
+}
+
+/*
+ * Initialize Hardware
+ */
+static int
+ioat3_attach(device_t device)
+{
+ struct ioat_softc *ioat;
+ struct ioat_descriptor **ring;
+ struct ioat_descriptor *next;
+ struct ioat_dma_hw_descriptor *dma_hw_desc;
+ int i, num_descriptors;
+ int error;
+ uint8_t xfercap;
+
+ error = 0;
+ ioat = DEVICE2SOFTC(device);
+ ioat->capabilities = ioat_read_dmacapability(ioat);
+
+ ioat_log_message(1, "Capabilities: %b\n", (int)ioat->capabilities,
+ IOAT_DMACAP_STR);
+
+ xfercap = ioat_read_xfercap(ioat);
+ ioat->max_xfer_size = 1 << xfercap;
+
+ ioat->intrdelay_supported = (ioat_read_2(ioat, IOAT_INTRDELAY_OFFSET) &
+ IOAT_INTRDELAY_SUPPORTED) != 0;
+ if (ioat->intrdelay_supported)
+ ioat->intrdelay_max = IOAT_INTRDELAY_US_MASK;
+
+ /* TODO: need to check DCA here if we ever do XOR/PQ */
+
+ mtx_init(&ioat->submit_lock, "ioat_submit", NULL, MTX_DEF);
+ mtx_init(&ioat->cleanup_lock, "ioat_cleanup", NULL, MTX_DEF);
+ callout_init(&ioat->timer, 1);
+ TASK_INIT(&ioat->reset_task, 0, ioat_reset_hw_task, ioat);
+
+ /* Establish lock order for Witness */
+ mtx_lock(&ioat->submit_lock);
+ mtx_lock(&ioat->cleanup_lock);
+ mtx_unlock(&ioat->cleanup_lock);
+ mtx_unlock(&ioat->submit_lock);
+
+ ioat->is_resize_pending = FALSE;
+ ioat->is_completion_pending = FALSE;
+ ioat->is_reset_pending = FALSE;
+ ioat->is_channel_running = FALSE;
+
+ bus_dma_tag_create(bus_get_dma_tag(ioat->device), sizeof(uint64_t), 0x0,
+ BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
+ sizeof(uint64_t), 1, sizeof(uint64_t), 0, NULL, NULL,
+ &ioat->comp_update_tag);
+
+ 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);
+
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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