ioat.c revision 289983
1287117Scem/*- 2287117Scem * Copyright (C) 2012 Intel Corporation 3287117Scem * All rights reserved. 4287117Scem * 5287117Scem * Redistribution and use in source and binary forms, with or without 6287117Scem * modification, are permitted provided that the following conditions 7287117Scem * are met: 8287117Scem * 1. Redistributions of source code must retain the above copyright 9287117Scem * notice, this list of conditions and the following disclaimer. 10287117Scem * 2. Redistributions in binary form must reproduce the above copyright 11287117Scem * notice, this list of conditions and the following disclaimer in the 12287117Scem * documentation and/or other materials provided with the distribution. 13287117Scem * 14287117Scem * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15287117Scem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16287117Scem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17287117Scem * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18287117Scem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19287117Scem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20287117Scem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21287117Scem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22287117Scem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23287117Scem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24287117Scem * SUCH DAMAGE. 25287117Scem */ 26287117Scem 27287117Scem#include <sys/cdefs.h> 28287117Scem__FBSDID("$FreeBSD: head/sys/dev/ioat/ioat.c 289983 2015-10-26 03:30:50Z cem $"); 29287117Scem 30287117Scem#include <sys/param.h> 31287117Scem#include <sys/systm.h> 32287117Scem#include <sys/bus.h> 33287117Scem#include <sys/conf.h> 34287117Scem#include <sys/ioccom.h> 35287117Scem#include <sys/kernel.h> 36287117Scem#include <sys/lock.h> 37287117Scem#include <sys/malloc.h> 38287117Scem#include <sys/module.h> 39287117Scem#include <sys/mutex.h> 40287117Scem#include <sys/rman.h> 41287117Scem#include <sys/sysctl.h> 42287117Scem#include <sys/time.h> 43287117Scem#include <dev/pci/pcireg.h> 44287117Scem#include <dev/pci/pcivar.h> 45287117Scem#include <machine/bus.h> 46287117Scem#include <machine/resource.h> 47287117Scem#include <machine/stdarg.h> 48287117Scem 49287117Scem#include "ioat.h" 50287117Scem#include "ioat_hw.h" 51287117Scem#include "ioat_internal.h" 52287117Scem 53289904Scem#define IOAT_INTR_TIMO (hz / 10) 54289907Scem#define IOAT_REFLK (&ioat->submit_lock) 55289904Scem 56287117Scemstatic int ioat_probe(device_t device); 57287117Scemstatic int ioat_attach(device_t device); 58287117Scemstatic int ioat_detach(device_t device); 59287403Scemstatic int ioat_setup_intr(struct ioat_softc *ioat); 60287403Scemstatic int ioat_teardown_intr(struct ioat_softc *ioat); 61287117Scemstatic int ioat3_attach(device_t device); 62289912Scemstatic int ioat_start_channel(struct ioat_softc *ioat); 63287117Scemstatic int ioat_map_pci_bar(struct ioat_softc *ioat); 64287117Scemstatic void ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, 65287117Scem int error); 66287117Scemstatic void ioat_interrupt_handler(void *arg); 67287414Scemstatic boolean_t ioat_model_resets_msix(struct ioat_softc *ioat); 68287117Scemstatic void ioat_process_events(struct ioat_softc *ioat); 69287117Scemstatic inline uint32_t ioat_get_active(struct ioat_softc *ioat); 70287117Scemstatic inline uint32_t ioat_get_ring_space(struct ioat_softc *ioat); 71289982Scemstatic void ioat_free_ring(struct ioat_softc *, uint32_t size, 72289982Scem struct ioat_descriptor **); 73287117Scemstatic void ioat_free_ring_entry(struct ioat_softc *ioat, 74287117Scem struct ioat_descriptor *desc); 75289982Scemstatic struct ioat_descriptor *ioat_alloc_ring_entry(struct ioat_softc *, 76289982Scem int mflags); 77289982Scemstatic int ioat_reserve_space(struct ioat_softc *, uint32_t, int mflags); 78289907Scemstatic struct ioat_descriptor *ioat_get_ring_entry(struct ioat_softc *ioat, 79287117Scem uint32_t index); 80289982Scemstatic struct ioat_descriptor **ioat_prealloc_ring(struct ioat_softc *, 81289982Scem uint32_t size, boolean_t need_dscr, int mflags); 82289982Scemstatic int ring_grow(struct ioat_softc *, uint32_t oldorder, 83289982Scem struct ioat_descriptor **); 84289982Scemstatic int ring_shrink(struct ioat_softc *, uint32_t oldorder, 85289982Scem struct ioat_descriptor **); 86287117Scemstatic void ioat_timer_callback(void *arg); 87287117Scemstatic void dump_descriptor(void *hw_desc); 88287117Scemstatic void ioat_submit_single(struct ioat_softc *ioat); 89287117Scemstatic void ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg, 90287117Scem int error); 91287117Scemstatic int ioat_reset_hw(struct ioat_softc *ioat); 92287117Scemstatic void ioat_setup_sysctl(device_t device); 93289908Scemstatic int sysctl_handle_reset(SYSCTL_HANDLER_ARGS); 94289907Scemstatic inline struct ioat_softc *ioat_get(struct ioat_softc *, 95289907Scem enum ioat_ref_kind); 96289907Scemstatic inline void ioat_put(struct ioat_softc *, enum ioat_ref_kind); 97289907Scemstatic inline void ioat_putn(struct ioat_softc *, uint32_t, 98289907Scem enum ioat_ref_kind); 99289907Scemstatic void ioat_drain(struct ioat_softc *); 100287117Scem 101289776Scem#define ioat_log_message(v, ...) do { \ 102289776Scem if ((v) <= g_ioat_debug_level) { \ 103289776Scem device_printf(ioat->device, __VA_ARGS__); \ 104289776Scem } \ 105289776Scem} while (0) 106289776Scem 107287117ScemMALLOC_DEFINE(M_IOAT, "ioat", "ioat driver memory allocations"); 108287117ScemSYSCTL_NODE(_hw, OID_AUTO, ioat, CTLFLAG_RD, 0, "ioat node"); 109287117Scem 110287117Scemstatic int g_force_legacy_interrupts; 111287117ScemSYSCTL_INT(_hw_ioat, OID_AUTO, force_legacy_interrupts, CTLFLAG_RDTUN, 112287117Scem &g_force_legacy_interrupts, 0, "Set to non-zero to force MSI-X disabled"); 113287117Scem 114289776Scemint g_ioat_debug_level = 0; 115287117ScemSYSCTL_INT(_hw_ioat, OID_AUTO, debug_level, CTLFLAG_RWTUN, &g_ioat_debug_level, 116287117Scem 0, "Set log level (0-3) for ioat(4). Higher is more verbose."); 117287117Scem 118287117Scem/* 119287117Scem * OS <-> Driver interface structures 120287117Scem */ 121287117Scemstatic device_method_t ioat_pci_methods[] = { 122287117Scem /* Device interface */ 123287117Scem DEVMETHOD(device_probe, ioat_probe), 124287117Scem DEVMETHOD(device_attach, ioat_attach), 125287117Scem DEVMETHOD(device_detach, ioat_detach), 126287117Scem { 0, 0 } 127287117Scem}; 128287117Scem 129287117Scemstatic driver_t ioat_pci_driver = { 130287117Scem "ioat", 131287117Scem ioat_pci_methods, 132287117Scem sizeof(struct ioat_softc), 133287117Scem}; 134287117Scem 135287117Scemstatic devclass_t ioat_devclass; 136287117ScemDRIVER_MODULE(ioat, pci, ioat_pci_driver, ioat_devclass, 0, 0); 137287117Scem 138287117Scem/* 139287117Scem * Private data structures 140287117Scem */ 141287117Scemstatic struct ioat_softc *ioat_channel[IOAT_MAX_CHANNELS]; 142287117Scemstatic int ioat_channel_index = 0; 143287117ScemSYSCTL_INT(_hw_ioat, OID_AUTO, channels, CTLFLAG_RD, &ioat_channel_index, 0, 144287117Scem "Number of IOAT channels attached"); 145287117Scem 146287117Scemstatic struct _pcsid 147287117Scem{ 148287117Scem u_int32_t type; 149287117Scem const char *desc; 150287117Scem} pci_ids[] = { 151287117Scem { 0x34308086, "TBG IOAT Ch0" }, 152287117Scem { 0x34318086, "TBG IOAT Ch1" }, 153287117Scem { 0x34328086, "TBG IOAT Ch2" }, 154287117Scem { 0x34338086, "TBG IOAT Ch3" }, 155287117Scem { 0x34298086, "TBG IOAT Ch4" }, 156287117Scem { 0x342a8086, "TBG IOAT Ch5" }, 157287117Scem { 0x342b8086, "TBG IOAT Ch6" }, 158287117Scem { 0x342c8086, "TBG IOAT Ch7" }, 159287117Scem 160287117Scem { 0x37108086, "JSF IOAT Ch0" }, 161287117Scem { 0x37118086, "JSF IOAT Ch1" }, 162287117Scem { 0x37128086, "JSF IOAT Ch2" }, 163287117Scem { 0x37138086, "JSF IOAT Ch3" }, 164287117Scem { 0x37148086, "JSF IOAT Ch4" }, 165287117Scem { 0x37158086, "JSF IOAT Ch5" }, 166287117Scem { 0x37168086, "JSF IOAT Ch6" }, 167287117Scem { 0x37178086, "JSF IOAT Ch7" }, 168287117Scem { 0x37188086, "JSF IOAT Ch0 (RAID)" }, 169287117Scem { 0x37198086, "JSF IOAT Ch1 (RAID)" }, 170287117Scem 171287117Scem { 0x3c208086, "SNB IOAT Ch0" }, 172287117Scem { 0x3c218086, "SNB IOAT Ch1" }, 173287117Scem { 0x3c228086, "SNB IOAT Ch2" }, 174287117Scem { 0x3c238086, "SNB IOAT Ch3" }, 175287117Scem { 0x3c248086, "SNB IOAT Ch4" }, 176287117Scem { 0x3c258086, "SNB IOAT Ch5" }, 177287117Scem { 0x3c268086, "SNB IOAT Ch6" }, 178287117Scem { 0x3c278086, "SNB IOAT Ch7" }, 179287117Scem { 0x3c2e8086, "SNB IOAT Ch0 (RAID)" }, 180287117Scem { 0x3c2f8086, "SNB IOAT Ch1 (RAID)" }, 181287117Scem 182287117Scem { 0x0e208086, "IVB IOAT Ch0" }, 183287117Scem { 0x0e218086, "IVB IOAT Ch1" }, 184287117Scem { 0x0e228086, "IVB IOAT Ch2" }, 185287117Scem { 0x0e238086, "IVB IOAT Ch3" }, 186287117Scem { 0x0e248086, "IVB IOAT Ch4" }, 187287117Scem { 0x0e258086, "IVB IOAT Ch5" }, 188287117Scem { 0x0e268086, "IVB IOAT Ch6" }, 189287117Scem { 0x0e278086, "IVB IOAT Ch7" }, 190287117Scem { 0x0e2e8086, "IVB IOAT Ch0 (RAID)" }, 191287117Scem { 0x0e2f8086, "IVB IOAT Ch1 (RAID)" }, 192287117Scem 193287117Scem { 0x2f208086, "HSW IOAT Ch0" }, 194287117Scem { 0x2f218086, "HSW IOAT Ch1" }, 195287117Scem { 0x2f228086, "HSW IOAT Ch2" }, 196287117Scem { 0x2f238086, "HSW IOAT Ch3" }, 197287117Scem { 0x2f248086, "HSW IOAT Ch4" }, 198287117Scem { 0x2f258086, "HSW IOAT Ch5" }, 199287117Scem { 0x2f268086, "HSW IOAT Ch6" }, 200287117Scem { 0x2f278086, "HSW IOAT Ch7" }, 201287117Scem { 0x2f2e8086, "HSW IOAT Ch0 (RAID)" }, 202287117Scem { 0x2f2f8086, "HSW IOAT Ch1 (RAID)" }, 203287117Scem 204287117Scem { 0x0c508086, "BWD IOAT Ch0" }, 205287117Scem { 0x0c518086, "BWD IOAT Ch1" }, 206287117Scem { 0x0c528086, "BWD IOAT Ch2" }, 207287117Scem { 0x0c538086, "BWD IOAT Ch3" }, 208287117Scem 209287117Scem { 0x6f508086, "BDXDE IOAT Ch0" }, 210287117Scem { 0x6f518086, "BDXDE IOAT Ch1" }, 211287117Scem { 0x6f528086, "BDXDE IOAT Ch2" }, 212287117Scem { 0x6f538086, "BDXDE IOAT Ch3" }, 213287117Scem 214287117Scem { 0x00000000, NULL } 215287117Scem}; 216287117Scem 217287117Scem/* 218287117Scem * OS <-> Driver linkage functions 219287117Scem */ 220287117Scemstatic int 221287117Scemioat_probe(device_t device) 222287117Scem{ 223287117Scem struct _pcsid *ep; 224287117Scem u_int32_t type; 225287117Scem 226287117Scem type = pci_get_devid(device); 227287117Scem for (ep = pci_ids; ep->type; ep++) { 228287117Scem if (ep->type == type) { 229287117Scem device_set_desc(device, ep->desc); 230287117Scem return (0); 231287117Scem } 232287117Scem } 233287117Scem return (ENXIO); 234287117Scem} 235287117Scem 236287117Scemstatic int 237287117Scemioat_attach(device_t device) 238287117Scem{ 239287117Scem struct ioat_softc *ioat; 240287117Scem int error; 241287117Scem 242287117Scem ioat = DEVICE2SOFTC(device); 243287117Scem ioat->device = device; 244287117Scem 245287117Scem error = ioat_map_pci_bar(ioat); 246287117Scem if (error != 0) 247287117Scem goto err; 248287117Scem 249287117Scem ioat->version = ioat_read_cbver(ioat); 250287117Scem if (ioat->version < IOAT_VER_3_0) { 251287117Scem error = ENODEV; 252287117Scem goto err; 253287117Scem } 254287117Scem 255287117Scem error = ioat3_attach(device); 256287117Scem if (error != 0) 257287117Scem goto err; 258287117Scem 259287117Scem error = pci_enable_busmaster(device); 260287117Scem if (error != 0) 261287117Scem goto err; 262287117Scem 263289907Scem error = ioat_setup_intr(ioat); 264289907Scem if (error != 0) 265289907Scem goto err; 266289907Scem 267289912Scem error = ioat_reset_hw(ioat); 268289760Scem if (error != 0) 269289907Scem goto err; 270289760Scem 271289760Scem ioat_process_events(ioat); 272289760Scem ioat_setup_sysctl(device); 273289760Scem 274287117Scem ioat_channel[ioat_channel_index++] = ioat; 275289760Scem ioat_test_attach(); 276287117Scem 277287117Scemerr: 278287117Scem if (error != 0) 279287117Scem ioat_detach(device); 280287117Scem return (error); 281287117Scem} 282287117Scem 283287117Scemstatic int 284287117Scemioat_detach(device_t device) 285287117Scem{ 286287117Scem struct ioat_softc *ioat; 287287117Scem 288287117Scem ioat = DEVICE2SOFTC(device); 289289760Scem 290289760Scem ioat_test_detach(); 291289907Scem ioat_drain(ioat); 292289904Scem 293289904Scem ioat_teardown_intr(ioat); 294287117Scem callout_drain(&ioat->timer); 295287117Scem 296287117Scem pci_disable_busmaster(device); 297287117Scem 298287117Scem if (ioat->pci_resource != NULL) 299287117Scem bus_release_resource(device, SYS_RES_MEMORY, 300287117Scem ioat->pci_resource_id, ioat->pci_resource); 301287117Scem 302289982Scem if (ioat->ring != NULL) 303289982Scem ioat_free_ring(ioat, 1 << ioat->ring_size_order, ioat->ring); 304287117Scem 305287117Scem if (ioat->comp_update != NULL) { 306287117Scem bus_dmamap_unload(ioat->comp_update_tag, ioat->comp_update_map); 307287117Scem bus_dmamem_free(ioat->comp_update_tag, ioat->comp_update, 308287117Scem ioat->comp_update_map); 309287117Scem bus_dma_tag_destroy(ioat->comp_update_tag); 310287117Scem } 311287117Scem 312287117Scem bus_dma_tag_destroy(ioat->hw_desc_tag); 313287117Scem 314287403Scem return (0); 315287403Scem} 316287403Scem 317287403Scemstatic int 318287403Scemioat_teardown_intr(struct ioat_softc *ioat) 319287403Scem{ 320287403Scem 321287117Scem if (ioat->tag != NULL) 322287403Scem bus_teardown_intr(ioat->device, ioat->res, ioat->tag); 323287117Scem 324287117Scem if (ioat->res != NULL) 325287403Scem bus_release_resource(ioat->device, SYS_RES_IRQ, 326287117Scem rman_get_rid(ioat->res), ioat->res); 327287117Scem 328287403Scem pci_release_msi(ioat->device); 329287117Scem return (0); 330287117Scem} 331287117Scem 332287117Scemstatic int 333289912Scemioat_start_channel(struct ioat_softc *ioat) 334287117Scem{ 335287117Scem uint64_t status; 336287117Scem uint32_t chanerr; 337287117Scem int i; 338287117Scem 339287117Scem ioat_acquire(&ioat->dmaengine); 340287117Scem ioat_null(&ioat->dmaengine, NULL, NULL, 0); 341287117Scem ioat_release(&ioat->dmaengine); 342287117Scem 343287117Scem for (i = 0; i < 100; i++) { 344287117Scem DELAY(1); 345287117Scem status = ioat_get_chansts(ioat); 346287117Scem if (is_ioat_idle(status)) 347287117Scem return (0); 348287117Scem } 349287117Scem 350287117Scem chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 351287117Scem ioat_log_message(0, "could not start channel: " 352289983Scem "status = %#jx error = %b\n", (uintmax_t)status, (int)chanerr, 353289983Scem IOAT_CHANERR_STR); 354287117Scem return (ENXIO); 355287117Scem} 356287117Scem 357287117Scem/* 358287117Scem * Initialize Hardware 359287117Scem */ 360287117Scemstatic int 361287117Scemioat3_attach(device_t device) 362287117Scem{ 363287117Scem struct ioat_softc *ioat; 364287117Scem struct ioat_descriptor **ring; 365287117Scem struct ioat_descriptor *next; 366287117Scem struct ioat_dma_hw_descriptor *dma_hw_desc; 367287117Scem uint32_t capabilities; 368287117Scem int i, num_descriptors; 369287117Scem int error; 370287117Scem uint8_t xfercap; 371287117Scem 372287117Scem error = 0; 373287117Scem ioat = DEVICE2SOFTC(device); 374287117Scem capabilities = ioat_read_dmacapability(ioat); 375287117Scem 376287117Scem xfercap = ioat_read_xfercap(ioat); 377287117Scem ioat->max_xfer_size = 1 << xfercap; 378287117Scem 379287117Scem /* TODO: need to check DCA here if we ever do XOR/PQ */ 380287117Scem 381287117Scem mtx_init(&ioat->submit_lock, "ioat_submit", NULL, MTX_DEF); 382287117Scem mtx_init(&ioat->cleanup_lock, "ioat_process_events", NULL, MTX_DEF); 383289760Scem callout_init(&ioat->timer, 1); 384287117Scem 385287117Scem ioat->is_resize_pending = FALSE; 386287117Scem ioat->is_completion_pending = FALSE; 387287117Scem ioat->is_reset_pending = FALSE; 388287117Scem ioat->is_channel_running = FALSE; 389287117Scem 390287117Scem bus_dma_tag_create(bus_get_dma_tag(ioat->device), sizeof(uint64_t), 0x0, 391287117Scem BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 392287117Scem sizeof(uint64_t), 1, sizeof(uint64_t), 0, NULL, NULL, 393287117Scem &ioat->comp_update_tag); 394287117Scem 395287117Scem error = bus_dmamem_alloc(ioat->comp_update_tag, 396287117Scem (void **)&ioat->comp_update, BUS_DMA_ZERO, &ioat->comp_update_map); 397287117Scem if (ioat->comp_update == NULL) 398287117Scem return (ENOMEM); 399287117Scem 400287117Scem error = bus_dmamap_load(ioat->comp_update_tag, ioat->comp_update_map, 401287117Scem ioat->comp_update, sizeof(uint64_t), ioat_comp_update_map, ioat, 402287117Scem 0); 403287117Scem if (error != 0) 404287117Scem return (error); 405287117Scem 406287117Scem ioat->ring_size_order = IOAT_MIN_ORDER; 407287117Scem 408287117Scem num_descriptors = 1 << ioat->ring_size_order; 409287117Scem 410287117Scem bus_dma_tag_create(bus_get_dma_tag(ioat->device), 0x40, 0x0, 411287117Scem BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 412287117Scem sizeof(struct ioat_dma_hw_descriptor), 1, 413287117Scem sizeof(struct ioat_dma_hw_descriptor), 0, NULL, NULL, 414287117Scem &ioat->hw_desc_tag); 415287117Scem 416287117Scem ioat->ring = malloc(num_descriptors * sizeof(*ring), M_IOAT, 417289982Scem M_ZERO | M_WAITOK); 418287117Scem if (ioat->ring == NULL) 419287117Scem return (ENOMEM); 420287117Scem 421287117Scem ring = ioat->ring; 422287117Scem for (i = 0; i < num_descriptors; i++) { 423289982Scem ring[i] = ioat_alloc_ring_entry(ioat, M_WAITOK); 424287117Scem if (ring[i] == NULL) 425287117Scem return (ENOMEM); 426287117Scem 427287117Scem ring[i]->id = i; 428287117Scem } 429287117Scem 430287117Scem for (i = 0; i < num_descriptors - 1; i++) { 431287117Scem next = ring[i + 1]; 432287117Scem dma_hw_desc = ring[i]->u.dma; 433287117Scem 434287117Scem dma_hw_desc->next = next->hw_desc_bus_addr; 435287117Scem } 436287117Scem 437287117Scem ring[i]->u.dma->next = ring[0]->hw_desc_bus_addr; 438287117Scem 439289982Scem ioat->head = ioat->hw_head = 0; 440287117Scem ioat->tail = 0; 441287117Scem ioat->last_seen = 0; 442287117Scem return (0); 443287117Scem} 444287117Scem 445287117Scemstatic int 446287117Scemioat_map_pci_bar(struct ioat_softc *ioat) 447287117Scem{ 448287117Scem 449287117Scem ioat->pci_resource_id = PCIR_BAR(0); 450289911Scem ioat->pci_resource = bus_alloc_resource_any(ioat->device, 451289911Scem SYS_RES_MEMORY, &ioat->pci_resource_id, RF_ACTIVE); 452287117Scem 453287117Scem if (ioat->pci_resource == NULL) { 454287117Scem ioat_log_message(0, "unable to allocate pci resource\n"); 455287117Scem return (ENODEV); 456287117Scem } 457287117Scem 458287117Scem ioat->pci_bus_tag = rman_get_bustag(ioat->pci_resource); 459287117Scem ioat->pci_bus_handle = rman_get_bushandle(ioat->pci_resource); 460287117Scem return (0); 461287117Scem} 462287117Scem 463287117Scemstatic void 464287117Scemioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg, int error) 465287117Scem{ 466287117Scem struct ioat_softc *ioat = arg; 467287117Scem 468289912Scem KASSERT(error == 0, ("%s: error:%d", __func__, error)); 469287117Scem ioat->comp_update_bus_addr = seg[0].ds_addr; 470287117Scem} 471287117Scem 472287117Scemstatic void 473287117Scemioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 474287117Scem{ 475287117Scem bus_addr_t *baddr; 476287117Scem 477289912Scem KASSERT(error == 0, ("%s: error:%d", __func__, error)); 478287117Scem baddr = arg; 479287117Scem *baddr = segs->ds_addr; 480287117Scem} 481287117Scem 482287117Scem/* 483287117Scem * Interrupt setup and handlers 484287117Scem */ 485287117Scemstatic int 486287403Scemioat_setup_intr(struct ioat_softc *ioat) 487287117Scem{ 488287117Scem uint32_t num_vectors; 489287117Scem int error; 490287117Scem boolean_t use_msix; 491287117Scem boolean_t force_legacy_interrupts; 492287117Scem 493287117Scem use_msix = FALSE; 494287117Scem force_legacy_interrupts = FALSE; 495287117Scem 496287117Scem if (!g_force_legacy_interrupts && pci_msix_count(ioat->device) >= 1) { 497287117Scem num_vectors = 1; 498287117Scem pci_alloc_msix(ioat->device, &num_vectors); 499287117Scem if (num_vectors == 1) 500287117Scem use_msix = TRUE; 501287117Scem } 502287117Scem 503287117Scem if (use_msix) { 504287117Scem ioat->rid = 1; 505287117Scem ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ, 506287117Scem &ioat->rid, RF_ACTIVE); 507287117Scem } else { 508287117Scem ioat->rid = 0; 509287117Scem ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ, 510287117Scem &ioat->rid, RF_SHAREABLE | RF_ACTIVE); 511287117Scem } 512287117Scem if (ioat->res == NULL) { 513287117Scem ioat_log_message(0, "bus_alloc_resource failed\n"); 514287117Scem return (ENOMEM); 515287117Scem } 516287117Scem 517287117Scem ioat->tag = NULL; 518287117Scem error = bus_setup_intr(ioat->device, ioat->res, INTR_MPSAFE | 519287117Scem INTR_TYPE_MISC, NULL, ioat_interrupt_handler, ioat, &ioat->tag); 520287117Scem if (error != 0) { 521287117Scem ioat_log_message(0, "bus_setup_intr failed\n"); 522287117Scem return (error); 523287117Scem } 524287117Scem 525287117Scem ioat_write_intrctrl(ioat, IOAT_INTRCTRL_MASTER_INT_EN); 526287117Scem return (0); 527287117Scem} 528287117Scem 529287403Scemstatic boolean_t 530287414Scemioat_model_resets_msix(struct ioat_softc *ioat) 531287403Scem{ 532287403Scem u_int32_t pciid; 533287403Scem 534287403Scem pciid = pci_get_devid(ioat->device); 535287403Scem switch (pciid) { 536287414Scem /* BWD: */ 537287414Scem case 0x0c508086: 538287414Scem case 0x0c518086: 539287414Scem case 0x0c528086: 540287414Scem case 0x0c538086: 541287414Scem /* BDXDE: */ 542287403Scem case 0x6f508086: 543287403Scem case 0x6f518086: 544287403Scem case 0x6f528086: 545287403Scem case 0x6f538086: 546287403Scem return (TRUE); 547287403Scem } 548287403Scem 549287403Scem return (FALSE); 550287403Scem} 551287403Scem 552287117Scemstatic void 553287117Scemioat_interrupt_handler(void *arg) 554287117Scem{ 555287117Scem struct ioat_softc *ioat = arg; 556287117Scem 557287117Scem ioat_process_events(ioat); 558287117Scem} 559287117Scem 560287117Scemstatic void 561287117Scemioat_process_events(struct ioat_softc *ioat) 562287117Scem{ 563287117Scem struct ioat_descriptor *desc; 564287117Scem struct bus_dmadesc *dmadesc; 565287117Scem uint64_t comp_update, status; 566287117Scem uint32_t completed; 567287117Scem 568287117Scem mtx_lock(&ioat->cleanup_lock); 569287117Scem 570287117Scem completed = 0; 571287117Scem comp_update = *ioat->comp_update; 572287117Scem status = comp_update & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_MASK; 573287117Scem 574289979Scem CTR0(KTR_IOAT, __func__); 575287117Scem 576289909Scem if (status == ioat->last_seen) 577289909Scem goto out; 578287117Scem 579287117Scem while (1) { 580287117Scem desc = ioat_get_ring_entry(ioat, ioat->tail); 581287117Scem dmadesc = &desc->bus_dmadesc; 582289979Scem CTR1(KTR_IOAT, "completing desc %d", ioat->tail); 583287117Scem 584287117Scem if (dmadesc->callback_fn) 585287117Scem (*dmadesc->callback_fn)(dmadesc->callback_arg); 586287117Scem 587289907Scem completed++; 588287117Scem ioat->tail++; 589287117Scem if (desc->hw_desc_bus_addr == status) 590287117Scem break; 591287117Scem } 592287117Scem 593287117Scem ioat->last_seen = desc->hw_desc_bus_addr; 594287117Scem 595287117Scem if (ioat->head == ioat->tail) { 596287117Scem ioat->is_completion_pending = FALSE; 597289904Scem callout_reset(&ioat->timer, IOAT_INTR_TIMO, 598289904Scem ioat_timer_callback, ioat); 599287117Scem } 600287117Scem 601289909Scemout: 602287117Scem ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 603287117Scem mtx_unlock(&ioat->cleanup_lock); 604289907Scem 605289907Scem ioat_putn(ioat, completed, IOAT_ACTIVE_DESCR_REF); 606289982Scem wakeup(&ioat->tail); 607287117Scem} 608287117Scem 609287117Scem/* 610287117Scem * User API functions 611287117Scem */ 612287117Scembus_dmaengine_t 613287117Scemioat_get_dmaengine(uint32_t index) 614287117Scem{ 615287117Scem 616289907Scem if (index >= ioat_channel_index) 617289907Scem return (NULL); 618289907Scem return (&ioat_get(ioat_channel[index], IOAT_DMAENGINE_REF)->dmaengine); 619287117Scem} 620287117Scem 621287117Scemvoid 622289907Scemioat_put_dmaengine(bus_dmaengine_t dmaengine) 623289907Scem{ 624289907Scem struct ioat_softc *ioat; 625289907Scem 626289907Scem ioat = to_ioat_softc(dmaengine); 627289907Scem ioat_put(ioat, IOAT_DMAENGINE_REF); 628289907Scem} 629289907Scem 630289907Scemvoid 631287117Scemioat_acquire(bus_dmaengine_t dmaengine) 632287117Scem{ 633287117Scem struct ioat_softc *ioat; 634287117Scem 635287117Scem ioat = to_ioat_softc(dmaengine); 636287117Scem mtx_lock(&ioat->submit_lock); 637289979Scem CTR0(KTR_IOAT, __func__); 638287117Scem} 639287117Scem 640287117Scemvoid 641287117Scemioat_release(bus_dmaengine_t dmaengine) 642287117Scem{ 643287117Scem struct ioat_softc *ioat; 644287117Scem 645289776Scem ioat = to_ioat_softc(dmaengine); 646289979Scem CTR0(KTR_IOAT, __func__); 647289982Scem ioat_write_2(ioat, IOAT_DMACOUNT_OFFSET, (uint16_t)ioat->hw_head); 648287117Scem mtx_unlock(&ioat->submit_lock); 649287117Scem} 650287117Scem 651287117Scemstruct bus_dmadesc * 652287117Scemioat_null(bus_dmaengine_t dmaengine, bus_dmaengine_callback_t callback_fn, 653287117Scem void *callback_arg, uint32_t flags) 654287117Scem{ 655287117Scem struct ioat_softc *ioat; 656287117Scem struct ioat_descriptor *desc; 657287117Scem struct ioat_dma_hw_descriptor *hw_desc; 658289982Scem int mflags; 659287117Scem 660287117Scem KASSERT((flags & ~DMA_ALL_FLAGS) == 0, ("Unrecognized flag(s): %#x", 661287117Scem flags & ~DMA_ALL_FLAGS)); 662289982Scem if ((flags & DMA_NO_WAIT) != 0) 663289982Scem mflags = M_NOWAIT; 664289982Scem else 665289982Scem mflags = M_WAITOK; 666287117Scem 667287117Scem ioat = to_ioat_softc(dmaengine); 668289906Scem mtx_assert(&ioat->submit_lock, MA_OWNED); 669287117Scem 670289982Scem if (ioat_reserve_space(ioat, 1, mflags) != 0) 671287117Scem return (NULL); 672287117Scem 673289979Scem CTR0(KTR_IOAT, __func__); 674287117Scem 675287117Scem desc = ioat_get_ring_entry(ioat, ioat->head); 676287117Scem hw_desc = desc->u.dma; 677287117Scem 678287117Scem hw_desc->u.control_raw = 0; 679287117Scem hw_desc->u.control.null = 1; 680287117Scem hw_desc->u.control.completion_update = 1; 681287117Scem 682287117Scem if ((flags & DMA_INT_EN) != 0) 683287117Scem hw_desc->u.control.int_enable = 1; 684287117Scem 685287117Scem hw_desc->size = 8; 686287117Scem hw_desc->src_addr = 0; 687287117Scem hw_desc->dest_addr = 0; 688287117Scem 689287117Scem desc->bus_dmadesc.callback_fn = callback_fn; 690287117Scem desc->bus_dmadesc.callback_arg = callback_arg; 691287117Scem 692287117Scem ioat_submit_single(ioat); 693287117Scem return (&desc->bus_dmadesc); 694287117Scem} 695287117Scem 696287117Scemstruct bus_dmadesc * 697287117Scemioat_copy(bus_dmaengine_t dmaengine, bus_addr_t dst, 698287117Scem bus_addr_t src, bus_size_t len, bus_dmaengine_callback_t callback_fn, 699287117Scem void *callback_arg, uint32_t flags) 700287117Scem{ 701287117Scem struct ioat_descriptor *desc; 702287117Scem struct ioat_dma_hw_descriptor *hw_desc; 703287117Scem struct ioat_softc *ioat; 704289982Scem int mflags; 705287117Scem 706287117Scem KASSERT((flags & ~DMA_ALL_FLAGS) == 0, ("Unrecognized flag(s): %#x", 707287117Scem flags & ~DMA_ALL_FLAGS)); 708289982Scem if ((flags & DMA_NO_WAIT) != 0) 709289982Scem mflags = M_NOWAIT; 710289982Scem else 711289982Scem mflags = M_WAITOK; 712287117Scem 713287117Scem ioat = to_ioat_softc(dmaengine); 714289906Scem mtx_assert(&ioat->submit_lock, MA_OWNED); 715287117Scem 716287117Scem if (len > ioat->max_xfer_size) { 717287117Scem ioat_log_message(0, "%s: max_xfer_size = %d, requested = %d\n", 718287117Scem __func__, ioat->max_xfer_size, (int)len); 719287117Scem return (NULL); 720287117Scem } 721287117Scem 722289982Scem if (ioat_reserve_space(ioat, 1, mflags) != 0) 723287117Scem return (NULL); 724287117Scem 725289979Scem CTR0(KTR_IOAT, __func__); 726287117Scem 727287117Scem desc = ioat_get_ring_entry(ioat, ioat->head); 728287117Scem hw_desc = desc->u.dma; 729287117Scem 730287117Scem hw_desc->u.control_raw = 0; 731287117Scem hw_desc->u.control.completion_update = 1; 732287117Scem 733287117Scem if ((flags & DMA_INT_EN) != 0) 734287117Scem hw_desc->u.control.int_enable = 1; 735287117Scem 736287117Scem hw_desc->size = len; 737287117Scem hw_desc->src_addr = src; 738287117Scem hw_desc->dest_addr = dst; 739287117Scem 740287117Scem if (g_ioat_debug_level >= 3) 741287117Scem dump_descriptor(hw_desc); 742287117Scem 743287117Scem desc->bus_dmadesc.callback_fn = callback_fn; 744287117Scem desc->bus_dmadesc.callback_arg = callback_arg; 745287117Scem 746287117Scem ioat_submit_single(ioat); 747287117Scem return (&desc->bus_dmadesc); 748287117Scem} 749287117Scem 750287117Scem/* 751287117Scem * Ring Management 752287117Scem */ 753287117Scemstatic inline uint32_t 754287117Scemioat_get_active(struct ioat_softc *ioat) 755287117Scem{ 756287117Scem 757287117Scem return ((ioat->head - ioat->tail) & ((1 << ioat->ring_size_order) - 1)); 758287117Scem} 759287117Scem 760287117Scemstatic inline uint32_t 761287117Scemioat_get_ring_space(struct ioat_softc *ioat) 762287117Scem{ 763287117Scem 764287117Scem return ((1 << ioat->ring_size_order) - ioat_get_active(ioat) - 1); 765287117Scem} 766287117Scem 767287117Scemstatic struct ioat_descriptor * 768289982Scemioat_alloc_ring_entry(struct ioat_softc *ioat, int mflags) 769287117Scem{ 770287117Scem struct ioat_dma_hw_descriptor *hw_desc; 771287117Scem struct ioat_descriptor *desc; 772289982Scem int error, busdmaflag; 773287117Scem 774289905Scem error = ENOMEM; 775289905Scem hw_desc = NULL; 776289905Scem 777289982Scem if ((mflags & M_WAITOK) != 0) 778289982Scem busdmaflag = BUS_DMA_WAITOK; 779289982Scem else 780289982Scem busdmaflag = BUS_DMA_NOWAIT; 781289982Scem 782289982Scem desc = malloc(sizeof(*desc), M_IOAT, mflags); 783287117Scem if (desc == NULL) 784289905Scem goto out; 785287117Scem 786289905Scem bus_dmamem_alloc(ioat->hw_desc_tag, (void **)&hw_desc, 787289982Scem BUS_DMA_ZERO | busdmaflag, &ioat->hw_desc_map); 788289905Scem if (hw_desc == NULL) 789289905Scem goto out; 790289905Scem 791289905Scem desc->u.dma = hw_desc; 792289905Scem 793289905Scem error = bus_dmamap_load(ioat->hw_desc_tag, ioat->hw_desc_map, hw_desc, 794289905Scem sizeof(*hw_desc), ioat_dmamap_cb, &desc->hw_desc_bus_addr, 795289982Scem busdmaflag); 796289905Scem if (error) 797289905Scem goto out; 798289905Scem 799289905Scemout: 800289905Scem if (error) { 801289905Scem ioat_free_ring_entry(ioat, desc); 802287117Scem return (NULL); 803287117Scem } 804287117Scem return (desc); 805287117Scem} 806287117Scem 807287117Scemstatic void 808287117Scemioat_free_ring_entry(struct ioat_softc *ioat, struct ioat_descriptor *desc) 809287117Scem{ 810287117Scem 811287117Scem if (desc == NULL) 812287117Scem return; 813287117Scem 814287117Scem if (desc->u.dma) 815287117Scem bus_dmamem_free(ioat->hw_desc_tag, desc->u.dma, 816287117Scem ioat->hw_desc_map); 817287117Scem free(desc, M_IOAT); 818287117Scem} 819287117Scem 820289982Scem/* 821289982Scem * Reserves space in this IOAT descriptor ring by ensuring enough slots remain 822289982Scem * for 'num_descs'. 823289982Scem * 824289982Scem * If mflags contains M_WAITOK, blocks until enough space is available. 825289982Scem * 826289982Scem * Returns zero on success, or an errno on error. If num_descs is beyond the 827289982Scem * maximum ring size, returns EINVAl; if allocation would block and mflags 828289982Scem * contains M_NOWAIT, returns EAGAIN. 829289982Scem * 830289982Scem * Must be called with the submit_lock held; returns with the lock held. The 831289982Scem * lock may be dropped to allocate the ring. 832289982Scem * 833289982Scem * (The submit_lock is needed to add any entries to the ring, so callers are 834289982Scem * assured enough room is available.) 835289982Scem */ 836287117Scemstatic int 837289982Scemioat_reserve_space(struct ioat_softc *ioat, uint32_t num_descs, int mflags) 838287117Scem{ 839289982Scem struct ioat_descriptor **new_ring; 840289982Scem uint32_t order; 841289982Scem int error; 842287117Scem 843289982Scem mtx_assert(&ioat->submit_lock, MA_OWNED); 844289982Scem error = 0; 845289982Scem 846289982Scem if (num_descs < 1 || num_descs > (1 << IOAT_MAX_ORDER)) { 847289982Scem error = EINVAL; 848289982Scem goto out; 849289982Scem } 850289982Scem 851289982Scem for (;;) { 852287117Scem if (ioat_get_ring_space(ioat) >= num_descs) 853289982Scem goto out; 854287117Scem 855289982Scem order = ioat->ring_size_order; 856289982Scem if (ioat->is_resize_pending || order == IOAT_MAX_ORDER) { 857289982Scem if ((mflags & M_WAITOK) != 0) { 858289982Scem msleep(&ioat->tail, &ioat->submit_lock, 0, 859289982Scem "ioat_rsz", 0); 860289982Scem continue; 861289982Scem } 862287117Scem 863289982Scem error = EAGAIN; 864289982Scem break; 865289982Scem } 866289982Scem 867289982Scem ioat->is_resize_pending = TRUE; 868289982Scem for (;;) { 869289982Scem mtx_unlock(&ioat->submit_lock); 870289982Scem 871289982Scem new_ring = ioat_prealloc_ring(ioat, 1 << (order + 1), 872289982Scem TRUE, mflags); 873289982Scem 874289982Scem mtx_lock(&ioat->submit_lock); 875289982Scem KASSERT(ioat->ring_size_order == order, 876289982Scem ("is_resize_pending should protect order")); 877289982Scem 878289982Scem if (new_ring == NULL) { 879289982Scem KASSERT((mflags & M_WAITOK) == 0, 880289982Scem ("allocation failed")); 881289982Scem error = EAGAIN; 882289982Scem break; 883289982Scem } 884289982Scem 885289982Scem error = ring_grow(ioat, order, new_ring); 886289982Scem if (error == 0) 887289982Scem break; 888289982Scem } 889289982Scem ioat->is_resize_pending = FALSE; 890289982Scem wakeup(&ioat->tail); 891289982Scem if (error) 892289982Scem break; 893287117Scem } 894289982Scem 895289982Scemout: 896289982Scem mtx_assert(&ioat->submit_lock, MA_OWNED); 897289982Scem return (error); 898287117Scem} 899287117Scem 900289982Scemstatic struct ioat_descriptor ** 901289982Scemioat_prealloc_ring(struct ioat_softc *ioat, uint32_t size, boolean_t need_dscr, 902289982Scem int mflags) 903289982Scem{ 904289982Scem struct ioat_descriptor **ring; 905289982Scem uint32_t i; 906289982Scem int error; 907289982Scem 908289982Scem KASSERT(size > 0 && powerof2(size), ("bogus size")); 909289982Scem 910289982Scem ring = malloc(size * sizeof(*ring), M_IOAT, M_ZERO | mflags); 911289982Scem if (ring == NULL) 912289982Scem return (NULL); 913289982Scem 914289982Scem if (need_dscr) { 915289982Scem error = ENOMEM; 916289982Scem for (i = size / 2; i < size; i++) { 917289982Scem ring[i] = ioat_alloc_ring_entry(ioat, mflags); 918289982Scem if (ring[i] == NULL) 919289982Scem goto out; 920289982Scem ring[i]->id = i; 921289982Scem } 922289982Scem } 923289982Scem error = 0; 924289982Scem 925289982Scemout: 926289982Scem if (error != 0 && ring != NULL) { 927289982Scem ioat_free_ring(ioat, size, ring); 928289982Scem ring = NULL; 929289982Scem } 930289982Scem return (ring); 931289982Scem} 932289982Scem 933289982Scemstatic void 934289982Scemioat_free_ring(struct ioat_softc *ioat, uint32_t size, 935289982Scem struct ioat_descriptor **ring) 936289982Scem{ 937289982Scem uint32_t i; 938289982Scem 939289982Scem for (i = 0; i < size; i++) { 940289982Scem if (ring[i] != NULL) 941289982Scem ioat_free_ring_entry(ioat, ring[i]); 942289982Scem } 943289982Scem free(ring, M_IOAT); 944289982Scem} 945289982Scem 946287117Scemstatic struct ioat_descriptor * 947287117Scemioat_get_ring_entry(struct ioat_softc *ioat, uint32_t index) 948287117Scem{ 949287117Scem 950287117Scem return (ioat->ring[index % (1 << ioat->ring_size_order)]); 951287117Scem} 952287117Scem 953289982Scemstatic int 954289982Scemring_grow(struct ioat_softc *ioat, uint32_t oldorder, 955289982Scem struct ioat_descriptor **newring) 956287117Scem{ 957289982Scem struct ioat_descriptor *tmp, *next; 958287117Scem struct ioat_dma_hw_descriptor *hw; 959289982Scem uint32_t oldsize, newsize, head, tail, i, end; 960289982Scem int error; 961287117Scem 962289982Scem CTR0(KTR_IOAT, __func__); 963287117Scem 964289982Scem mtx_assert(&ioat->submit_lock, MA_OWNED); 965287117Scem 966289982Scem if (oldorder != ioat->ring_size_order || oldorder >= IOAT_MAX_ORDER) { 967289982Scem error = EINVAL; 968289982Scem goto out; 969289982Scem } 970287117Scem 971289982Scem oldsize = (1 << oldorder); 972289982Scem newsize = (1 << (oldorder + 1)); 973287117Scem 974289982Scem mtx_lock(&ioat->cleanup_lock); 975287117Scem 976289982Scem head = ioat->head & (oldsize - 1); 977289982Scem tail = ioat->tail & (oldsize - 1); 978287117Scem 979289982Scem /* Copy old descriptors to new ring */ 980289982Scem for (i = 0; i < oldsize; i++) 981289982Scem newring[i] = ioat->ring[i]; 982287117Scem 983289982Scem /* 984289982Scem * If head has wrapped but tail hasn't, we must swap some descriptors 985289982Scem * around so that tail can increment directly to head. 986289982Scem */ 987289982Scem if (head < tail) { 988289982Scem for (i = 0; i <= head; i++) { 989289982Scem tmp = newring[oldsize + i]; 990287117Scem 991289982Scem newring[oldsize + i] = newring[i]; 992289982Scem newring[oldsize + i]->id = oldsize + i; 993287117Scem 994289982Scem newring[i] = tmp; 995289982Scem newring[i]->id = i; 996287117Scem } 997289982Scem head += oldsize; 998289982Scem } 999287117Scem 1000289982Scem KASSERT(head >= tail, ("invariants")); 1001287117Scem 1002289982Scem /* Head didn't wrap; we only need to link in oldsize..newsize */ 1003289982Scem if (head < oldsize) { 1004289982Scem i = oldsize - 1; 1005289982Scem end = newsize; 1006287117Scem } else { 1007289982Scem /* Head did wrap; link newhead..newsize and 0..oldhead */ 1008289982Scem i = head; 1009289982Scem end = newsize + (head - oldsize) + 1; 1010289982Scem } 1011287117Scem 1012289982Scem /* 1013289982Scem * Fix up hardware ring, being careful not to trample the active 1014289982Scem * section (tail -> head). 1015289982Scem */ 1016289982Scem for (; i < end; i++) { 1017289982Scem KASSERT((i & (newsize - 1)) < tail || 1018289982Scem (i & (newsize - 1)) >= head, ("trampling snake")); 1019287117Scem 1020289982Scem next = newring[(i + 1) & (newsize - 1)]; 1021289982Scem hw = newring[i & (newsize - 1)]->u.dma; 1022287117Scem hw->next = next->hw_desc_bus_addr; 1023287117Scem } 1024287117Scem 1025287117Scem free(ioat->ring, M_IOAT); 1026289982Scem ioat->ring = newring; 1027289982Scem ioat->ring_size_order = oldorder + 1; 1028289982Scem ioat->tail = tail; 1029289982Scem ioat->head = head; 1030289982Scem error = 0; 1031287117Scem 1032289982Scem mtx_unlock(&ioat->cleanup_lock); 1033289982Scemout: 1034289982Scem if (error) 1035289982Scem ioat_free_ring(ioat, (1 << (oldorder + 1)), newring); 1036289982Scem return (error); 1037287117Scem} 1038287117Scem 1039289982Scemstatic int 1040289982Scemring_shrink(struct ioat_softc *ioat, uint32_t oldorder, 1041289982Scem struct ioat_descriptor **newring) 1042289982Scem{ 1043289982Scem struct ioat_dma_hw_descriptor *hw; 1044289982Scem struct ioat_descriptor *ent, *next; 1045289982Scem uint32_t oldsize, newsize, current_idx, new_idx, i; 1046289982Scem int error; 1047289982Scem 1048289982Scem CTR0(KTR_IOAT, __func__); 1049289982Scem 1050289982Scem mtx_assert(&ioat->submit_lock, MA_OWNED); 1051289982Scem 1052289982Scem if (oldorder != ioat->ring_size_order || oldorder <= IOAT_MIN_ORDER) { 1053289982Scem error = EINVAL; 1054289982Scem goto out_unlocked; 1055289982Scem } 1056289982Scem 1057289982Scem oldsize = (1 << oldorder); 1058289982Scem newsize = (1 << (oldorder - 1)); 1059289982Scem 1060289982Scem mtx_lock(&ioat->cleanup_lock); 1061289982Scem 1062289982Scem /* Can't shrink below current active set! */ 1063289982Scem if (ioat_get_active(ioat) >= newsize) { 1064289982Scem error = ENOMEM; 1065289982Scem goto out; 1066289982Scem } 1067289982Scem 1068289982Scem /* 1069289982Scem * Copy current descriptors to the new ring, dropping the removed 1070289982Scem * descriptors. 1071289982Scem */ 1072289982Scem for (i = 0; i < newsize; i++) { 1073289982Scem current_idx = (ioat->tail + i) & (oldsize - 1); 1074289982Scem new_idx = (ioat->tail + i) & (newsize - 1); 1075289982Scem 1076289982Scem newring[new_idx] = ioat->ring[current_idx]; 1077289982Scem newring[new_idx]->id = new_idx; 1078289982Scem } 1079289982Scem 1080289982Scem /* Free deleted descriptors */ 1081289982Scem for (i = newsize; i < oldsize; i++) { 1082289982Scem ent = ioat_get_ring_entry(ioat, ioat->tail + i); 1083289982Scem ioat_free_ring_entry(ioat, ent); 1084289982Scem } 1085289982Scem 1086289982Scem /* Fix up hardware ring. */ 1087289982Scem hw = newring[(ioat->tail + newsize - 1) & (newsize - 1)]->u.dma; 1088289982Scem next = newring[(ioat->tail + newsize) & (newsize - 1)]; 1089289982Scem hw->next = next->hw_desc_bus_addr; 1090289982Scem 1091289982Scem free(ioat->ring, M_IOAT); 1092289982Scem ioat->ring = newring; 1093289982Scem ioat->ring_size_order = oldorder - 1; 1094289982Scem error = 0; 1095289982Scem 1096289982Scemout: 1097289982Scem mtx_unlock(&ioat->cleanup_lock); 1098289982Scemout_unlocked: 1099289982Scem if (error) 1100289982Scem ioat_free_ring(ioat, (1 << (oldorder - 1)), newring); 1101289982Scem return (error); 1102289982Scem} 1103289982Scem 1104287117Scemstatic void 1105289910Scemioat_halted_debug(struct ioat_softc *ioat, uint32_t chanerr) 1106289910Scem{ 1107289910Scem struct ioat_descriptor *desc; 1108289910Scem 1109289983Scem ioat_log_message(0, "Channel halted (%b)\n", (int)chanerr, 1110289983Scem IOAT_CHANERR_STR); 1111289910Scem if (chanerr == 0) 1112289910Scem return; 1113289910Scem 1114289982Scem mtx_lock(&ioat->submit_lock); 1115289910Scem desc = ioat_get_ring_entry(ioat, ioat->tail + 0); 1116289910Scem dump_descriptor(desc->u.raw); 1117289910Scem 1118289910Scem desc = ioat_get_ring_entry(ioat, ioat->tail + 1); 1119289910Scem dump_descriptor(desc->u.raw); 1120289982Scem mtx_unlock(&ioat->submit_lock); 1121289910Scem} 1122289910Scem 1123289910Scemstatic void 1124287117Scemioat_timer_callback(void *arg) 1125287117Scem{ 1126289982Scem struct ioat_descriptor **newring; 1127287117Scem struct ioat_softc *ioat; 1128287117Scem uint64_t status; 1129289982Scem uint32_t chanerr, order; 1130287117Scem 1131287117Scem ioat = arg; 1132289904Scem ioat_log_message(1, "%s\n", __func__); 1133287117Scem 1134287117Scem if (ioat->is_completion_pending) { 1135287117Scem status = ioat_get_chansts(ioat); 1136287117Scem 1137287117Scem /* 1138287117Scem * When halted due to errors, check for channel programming 1139287117Scem * errors before advancing the completion state. 1140287117Scem */ 1141287117Scem if (is_ioat_halted(status)) { 1142287117Scem chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 1143289910Scem ioat_halted_debug(ioat, chanerr); 1144287117Scem } 1145287117Scem ioat_process_events(ioat); 1146287117Scem } else { 1147287117Scem mtx_lock(&ioat->submit_lock); 1148289982Scem order = ioat->ring_size_order; 1149289982Scem if (ioat->is_resize_pending || order == IOAT_MIN_ORDER) { 1150289982Scem mtx_unlock(&ioat->submit_lock); 1151289982Scem goto out; 1152289982Scem } 1153289982Scem ioat->is_resize_pending = TRUE; 1154289982Scem mtx_unlock(&ioat->submit_lock); 1155287117Scem 1156289982Scem newring = ioat_prealloc_ring(ioat, 1 << (order - 1), FALSE, 1157289982Scem M_NOWAIT); 1158287117Scem 1159289982Scem mtx_lock(&ioat->submit_lock); 1160289982Scem KASSERT(ioat->ring_size_order == order, 1161289982Scem ("resize_pending protects order")); 1162289982Scem 1163289982Scem if (newring != NULL) 1164289982Scem ring_shrink(ioat, order, newring); 1165289982Scem 1166289982Scem ioat->is_resize_pending = FALSE; 1167287117Scem mtx_unlock(&ioat->submit_lock); 1168287117Scem 1169289982Scemout: 1170289982Scem /* Slowly scale the ring down if idle. */ 1171287117Scem if (ioat->ring_size_order > IOAT_MIN_ORDER) 1172289982Scem callout_reset(&ioat->timer, 10 * hz, 1173287117Scem ioat_timer_callback, ioat); 1174287117Scem } 1175287117Scem} 1176287117Scem 1177287117Scem/* 1178287117Scem * Support Functions 1179287117Scem */ 1180287117Scemstatic void 1181287117Scemioat_submit_single(struct ioat_softc *ioat) 1182287117Scem{ 1183287117Scem 1184289907Scem ioat_get(ioat, IOAT_ACTIVE_DESCR_REF); 1185287117Scem atomic_add_rel_int(&ioat->head, 1); 1186289982Scem atomic_add_rel_int(&ioat->hw_head, 1); 1187287117Scem 1188287117Scem if (!ioat->is_completion_pending) { 1189287117Scem ioat->is_completion_pending = TRUE; 1190289904Scem callout_reset(&ioat->timer, IOAT_INTR_TIMO, 1191289904Scem ioat_timer_callback, ioat); 1192287117Scem } 1193287117Scem} 1194287117Scem 1195287117Scemstatic int 1196287117Scemioat_reset_hw(struct ioat_softc *ioat) 1197287117Scem{ 1198287117Scem uint64_t status; 1199287117Scem uint32_t chanerr; 1200289912Scem unsigned timeout; 1201287117Scem 1202287117Scem status = ioat_get_chansts(ioat); 1203287117Scem if (is_ioat_active(status) || is_ioat_idle(status)) 1204287117Scem ioat_suspend(ioat); 1205287117Scem 1206287117Scem /* Wait at most 20 ms */ 1207287117Scem for (timeout = 0; (is_ioat_active(status) || is_ioat_idle(status)) && 1208287117Scem timeout < 20; timeout++) { 1209287117Scem DELAY(1000); 1210287117Scem status = ioat_get_chansts(ioat); 1211287117Scem } 1212287117Scem if (timeout == 20) 1213287117Scem return (ETIMEDOUT); 1214287117Scem 1215289912Scem KASSERT(ioat_get_active(ioat) == 0, ("active after quiesce")); 1216289912Scem 1217287117Scem chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 1218287117Scem ioat_write_4(ioat, IOAT_CHANERR_OFFSET, chanerr); 1219287117Scem 1220287117Scem /* 1221287117Scem * IOAT v3 workaround - CHANERRMSK_INT with 3E07h to masks out errors 1222287117Scem * that can cause stability issues for IOAT v3. 1223287117Scem */ 1224287117Scem pci_write_config(ioat->device, IOAT_CFG_CHANERRMASK_INT_OFFSET, 0x3e07, 1225287117Scem 4); 1226287117Scem chanerr = pci_read_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, 4); 1227287117Scem pci_write_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, chanerr, 4); 1228287117Scem 1229287414Scem /* 1230287414Scem * BDXDE and BWD models reset MSI-X registers on device reset. 1231287414Scem * Save/restore their contents manually. 1232287414Scem */ 1233289908Scem if (ioat_model_resets_msix(ioat)) { 1234289908Scem ioat_log_message(1, "device resets MSI-X registers; saving\n"); 1235287414Scem pci_save_state(ioat->device); 1236289908Scem } 1237287414Scem 1238287117Scem ioat_reset(ioat); 1239287117Scem 1240287117Scem /* Wait at most 20 ms */ 1241287117Scem for (timeout = 0; ioat_reset_pending(ioat) && timeout < 20; timeout++) 1242287117Scem DELAY(1000); 1243287117Scem if (timeout == 20) 1244287117Scem return (ETIMEDOUT); 1245287117Scem 1246289908Scem if (ioat_model_resets_msix(ioat)) { 1247289908Scem ioat_log_message(1, "device resets registers; restored\n"); 1248287414Scem pci_restore_state(ioat->device); 1249289908Scem } 1250287403Scem 1251289912Scem /* Reset attempts to return the hardware to "halted." */ 1252289912Scem status = ioat_get_chansts(ioat); 1253289912Scem if (is_ioat_active(status) || is_ioat_idle(status)) { 1254289912Scem /* So this really shouldn't happen... */ 1255289912Scem ioat_log_message(0, "Device is active after a reset?\n"); 1256289912Scem ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 1257289912Scem return (0); 1258289912Scem } 1259289912Scem 1260289912Scem chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 1261289912Scem ioat_halted_debug(ioat, chanerr); 1262289912Scem if (chanerr != 0) 1263289912Scem return (EIO); 1264289912Scem 1265289912Scem /* 1266289912Scem * Bring device back online after reset. Writing CHAINADDR brings the 1267289912Scem * device back to active. 1268289912Scem * 1269289912Scem * The internal ring counter resets to zero, so we have to start over 1270289912Scem * at zero as well. 1271289912Scem */ 1272289982Scem ioat->tail = ioat->head = ioat->hw_head = 0; 1273289912Scem ioat->last_seen = 0; 1274289912Scem 1275289912Scem ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 1276289912Scem ioat_write_chancmp(ioat, ioat->comp_update_bus_addr); 1277289912Scem ioat_write_chainaddr(ioat, ioat->ring[0]->hw_desc_bus_addr); 1278289912Scem return (ioat_start_channel(ioat)); 1279287117Scem} 1280287117Scem 1281289908Scemstatic int 1282289908Scemsysctl_handle_reset(SYSCTL_HANDLER_ARGS) 1283289908Scem{ 1284289908Scem struct ioat_softc *ioat; 1285289908Scem int error, arg; 1286289908Scem 1287289908Scem ioat = arg1; 1288289908Scem 1289289908Scem arg = 0; 1290289908Scem error = SYSCTL_OUT(req, &arg, sizeof(arg)); 1291289908Scem if (error != 0 || req->newptr == NULL) 1292289908Scem return (error); 1293289908Scem 1294289908Scem error = SYSCTL_IN(req, &arg, sizeof(arg)); 1295289908Scem if (error != 0) 1296289908Scem return (error); 1297289908Scem 1298289908Scem if (arg != 0) 1299289908Scem error = ioat_reset_hw(ioat); 1300289908Scem 1301289908Scem return (error); 1302289908Scem} 1303289908Scem 1304287117Scemstatic void 1305287117Scemdump_descriptor(void *hw_desc) 1306287117Scem{ 1307287117Scem int i, j; 1308287117Scem 1309287117Scem for (i = 0; i < 2; i++) { 1310287117Scem for (j = 0; j < 8; j++) 1311287117Scem printf("%08x ", ((uint32_t *)hw_desc)[i * 8 + j]); 1312287117Scem printf("\n"); 1313287117Scem } 1314287117Scem} 1315287117Scem 1316287117Scemstatic void 1317287117Scemioat_setup_sysctl(device_t device) 1318287117Scem{ 1319289908Scem struct sysctl_oid_list *par; 1320289908Scem struct sysctl_ctx_list *ctx; 1321289908Scem struct sysctl_oid *tree; 1322287117Scem struct ioat_softc *ioat; 1323287117Scem 1324287117Scem ioat = DEVICE2SOFTC(device); 1325289908Scem ctx = device_get_sysctl_ctx(device); 1326289908Scem tree = device_get_sysctl_tree(device); 1327289908Scem par = SYSCTL_CHILDREN(tree); 1328287117Scem 1329289980Scem SYSCTL_ADD_INT(ctx, par, OID_AUTO, "version", CTLFLAG_RD, 1330289980Scem &ioat->version, 0, "HW version (0xMM form)"); 1331289980Scem SYSCTL_ADD_UINT(ctx, par, OID_AUTO, "max_xfer_size", CTLFLAG_RD, 1332289980Scem &ioat->max_xfer_size, 0, "HW maximum transfer size"); 1333289980Scem 1334289908Scem SYSCTL_ADD_UINT(ctx, par, OID_AUTO, "ring_size_order", CTLFLAG_RD, 1335289982Scem &ioat->ring_size_order, 0, "SW descriptor ring size order"); 1336289908Scem SYSCTL_ADD_UINT(ctx, par, OID_AUTO, "head", CTLFLAG_RD, &ioat->head, 0, 1337289982Scem "SW descriptor head pointer index"); 1338289908Scem SYSCTL_ADD_UINT(ctx, par, OID_AUTO, "tail", CTLFLAG_RD, &ioat->tail, 0, 1339289982Scem "SW descriptor tail pointer index"); 1340289982Scem SYSCTL_ADD_UINT(ctx, par, OID_AUTO, "hw_head", CTLFLAG_RD, 1341289982Scem &ioat->hw_head, 0, "HW DMACOUNT"); 1342289908Scem 1343289980Scem SYSCTL_ADD_UQUAD(ctx, par, OID_AUTO, "last_completion", CTLFLAG_RD, 1344289980Scem ioat->comp_update, "HW addr of last completion"); 1345289980Scem 1346289980Scem SYSCTL_ADD_INT(ctx, par, OID_AUTO, "is_resize_pending", CTLFLAG_RD, 1347289980Scem &ioat->is_resize_pending, 0, "resize pending"); 1348289980Scem SYSCTL_ADD_INT(ctx, par, OID_AUTO, "is_completion_pending", CTLFLAG_RD, 1349289980Scem &ioat->is_completion_pending, 0, "completion pending"); 1350289980Scem SYSCTL_ADD_INT(ctx, par, OID_AUTO, "is_reset_pending", CTLFLAG_RD, 1351289980Scem &ioat->is_reset_pending, 0, "reset pending"); 1352289980Scem SYSCTL_ADD_INT(ctx, par, OID_AUTO, "is_channel_running", CTLFLAG_RD, 1353289980Scem &ioat->is_channel_running, 0, "channel running"); 1354289980Scem 1355289908Scem SYSCTL_ADD_PROC(ctx, par, OID_AUTO, "force_hw_reset", 1356289908Scem CTLTYPE_INT | CTLFLAG_RW, ioat, 0, sysctl_handle_reset, "I", 1357289908Scem "Set to non-zero to reset the hardware"); 1358287117Scem} 1359289907Scem 1360289907Scemstatic inline struct ioat_softc * 1361289907Scemioat_get(struct ioat_softc *ioat, enum ioat_ref_kind kind) 1362289907Scem{ 1363289907Scem uint32_t old; 1364289907Scem 1365289907Scem KASSERT(kind < IOAT_NUM_REF_KINDS, ("bogus")); 1366289907Scem 1367289907Scem old = atomic_fetchadd_32(&ioat->refcnt, 1); 1368289907Scem KASSERT(old < UINT32_MAX, ("refcnt overflow")); 1369289907Scem 1370289907Scem#ifdef INVARIANTS 1371289907Scem old = atomic_fetchadd_32(&ioat->refkinds[kind], 1); 1372289907Scem KASSERT(old < UINT32_MAX, ("refcnt kind overflow")); 1373289907Scem#endif 1374289907Scem 1375289907Scem return (ioat); 1376289907Scem} 1377289907Scem 1378289907Scemstatic inline void 1379289907Scemioat_putn(struct ioat_softc *ioat, uint32_t n, enum ioat_ref_kind kind) 1380289907Scem{ 1381289907Scem uint32_t old; 1382289907Scem 1383289907Scem KASSERT(kind < IOAT_NUM_REF_KINDS, ("bogus")); 1384289907Scem 1385289907Scem if (n == 0) 1386289907Scem return; 1387289907Scem 1388289907Scem#ifdef INVARIANTS 1389289907Scem old = atomic_fetchadd_32(&ioat->refkinds[kind], -n); 1390289907Scem KASSERT(old >= n, ("refcnt kind underflow")); 1391289907Scem#endif 1392289907Scem 1393289907Scem /* Skip acquiring the lock if resulting refcnt > 0. */ 1394289907Scem for (;;) { 1395289907Scem old = ioat->refcnt; 1396289907Scem if (old <= n) 1397289907Scem break; 1398289907Scem if (atomic_cmpset_32(&ioat->refcnt, old, old - n)) 1399289907Scem return; 1400289907Scem } 1401289907Scem 1402289907Scem mtx_lock(IOAT_REFLK); 1403289907Scem old = atomic_fetchadd_32(&ioat->refcnt, -n); 1404289907Scem KASSERT(old >= n, ("refcnt error")); 1405289907Scem 1406289907Scem if (old == n) 1407289907Scem wakeup(IOAT_REFLK); 1408289907Scem mtx_unlock(IOAT_REFLK); 1409289907Scem} 1410289907Scem 1411289907Scemstatic inline void 1412289907Scemioat_put(struct ioat_softc *ioat, enum ioat_ref_kind kind) 1413289907Scem{ 1414289907Scem 1415289907Scem ioat_putn(ioat, 1, kind); 1416289907Scem} 1417289907Scem 1418289907Scemstatic void 1419289907Scemioat_drain(struct ioat_softc *ioat) 1420289907Scem{ 1421289907Scem 1422289907Scem mtx_lock(IOAT_REFLK); 1423289907Scem while (ioat->refcnt > 0) 1424289907Scem msleep(IOAT_REFLK, IOAT_REFLK, 0, "ioat_drain", 0); 1425289907Scem mtx_unlock(IOAT_REFLK); 1426289907Scem} 1427