2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
3 * Copyright (c) 2014 The FreeBSD Foundation
6 * This software was developed by Semihalf under
7 * the sponsorship of the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 /* Generic ECAM PCIe driver */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include "opt_platform.h"
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/kernel.h>
43 #include <sys/module.h>
45 #include <sys/endian.h>
47 #include <dev/pci/pcivar.h>
48 #include <dev/pci/pcireg.h>
49 #include <dev/pci/pcib_private.h>
50 #include <dev/pci/pci_host_generic.h>
52 #include <machine/bus.h>
53 #include <machine/intr.h>
57 /* Assembling ECAM Configuration Address */
58 #define PCIE_BUS_SHIFT 20
59 #define PCIE_SLOT_SHIFT 15
60 #define PCIE_FUNC_SHIFT 12
61 #define PCIE_BUS_MASK 0xFF
62 #define PCIE_SLOT_MASK 0x1F
63 #define PCIE_FUNC_MASK 0x07
64 #define PCIE_REG_MASK 0xFFF
66 #define PCIE_ADDR_OFFSET(bus, slot, func, reg) \
67 ((((bus) & PCIE_BUS_MASK) << PCIE_BUS_SHIFT) | \
68 (((slot) & PCIE_SLOT_MASK) << PCIE_SLOT_SHIFT) | \
69 (((func) & PCIE_FUNC_MASK) << PCIE_FUNC_SHIFT) | \
70 ((reg) & PCIE_REG_MASK))
72 typedef void (*pci_host_generic_quirk_function)(device_t);
74 struct pci_host_generic_quirk_entry {
79 pci_host_generic_quirk_function func;
82 struct pci_host_generic_block_entry {
91 /* Forward prototypes */
93 static uint32_t generic_pcie_read_config(device_t dev, u_int bus, u_int slot,
94 u_int func, u_int reg, int bytes);
95 static void generic_pcie_write_config(device_t dev, u_int bus, u_int slot,
96 u_int func, u_int reg, uint32_t val, int bytes);
97 static int generic_pcie_maxslots(device_t dev);
98 static int generic_pcie_read_ivar(device_t dev, device_t child, int index,
100 static int generic_pcie_write_ivar(device_t dev, device_t child, int index,
103 #if defined(__aarch64__)
104 static void pci_host_generic_apply_quirks(device_t);
105 static void thunderx2_ahci_bar_quirk(device_t);
107 struct pci_host_generic_quirk_entry pci_host_generic_quirks[] =
109 {CPU_IMPL_CAVIUM, CPU_PART_THUNDERX2, 0, 0, thunderx2_ahci_bar_quirk},
113 struct pci_host_generic_block_entry pci_host_generic_blocked[] =
115 /* ThunderX2 AHCI on second socket */
116 {CPU_IMPL_CAVIUM, CPU_PART_THUNDERX2, 0, 0, 0x80, 0x10},
122 pci_host_generic_core_attach(device_t dev)
124 struct generic_pcie_core_softc *sc;
128 sc = device_get_softc(dev);
131 /* Create the parent DMA tag to pass down the coherent flag */
132 error = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
133 1, 0, /* alignment, bounds */
134 BUS_SPACE_MAXADDR, /* lowaddr */
135 BUS_SPACE_MAXADDR, /* highaddr */
136 NULL, NULL, /* filter, filterarg */
137 BUS_SPACE_MAXSIZE, /* maxsize */
138 BUS_SPACE_UNRESTRICTED, /* nsegments */
139 BUS_SPACE_MAXSIZE, /* maxsegsize */
140 sc->coherent ? BUS_DMA_COHERENT : 0, /* flags */
141 NULL, NULL, /* lockfunc, lockarg */
147 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE | RF_SHAREABLE);
148 if (sc->res == NULL) {
149 device_printf(dev, "could not map memory.\n");
153 sc->bst = rman_get_bustag(sc->res);
154 sc->bsh = rman_get_bushandle(sc->res);
156 sc->mem_rman.rm_type = RMAN_ARRAY;
157 sc->mem_rman.rm_descr = "PCIe Memory";
158 sc->io_rman.rm_type = RMAN_ARRAY;
159 sc->io_rman.rm_descr = "PCIe IO window";
161 /* Initialize rman and allocate memory regions */
162 error = rman_init(&sc->mem_rman);
164 device_printf(dev, "rman_init() failed. error = %d\n", error);
168 error = rman_init(&sc->io_rman);
170 device_printf(dev, "rman_init() failed. error = %d\n", error);
174 #if defined(__aarch64__)
175 pci_host_generic_apply_quirks(dev);
181 #if defined(__aarch64__)
183 pci_host_generic_apply_quirks(device_t dev)
185 struct pci_host_generic_quirk_entry *quirk;
187 quirk = pci_host_generic_quirks;
189 if (quirk->impl == 0)
192 if (CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
193 quirk->impl, quirk->part, quirk->var, quirk->rev) &&
203 generic_pcie_read_config(device_t dev, u_int bus, u_int slot,
204 u_int func, u_int reg, int bytes)
206 struct generic_pcie_core_softc *sc;
207 bus_space_handle_t h;
211 #if defined(__aarch64__)
212 struct pci_host_generic_block_entry *block;
215 if ((bus > PCI_BUSMAX) || (slot > PCI_SLOTMAX) ||
216 (func > PCI_FUNCMAX) || (reg > PCIE_REGMAX))
219 #if defined(__aarch64__)
220 block = pci_host_generic_blocked;
222 if (block->impl == 0)
225 if (CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
226 block->impl, block->part, block->var, block->rev) &&
227 block->bus == bus && block->slot == slot)
234 sc = device_get_softc(dev);
236 offset = PCIE_ADDR_OFFSET(bus, slot, func, reg);
242 data = bus_space_read_1(t, h, offset);
245 data = le16toh(bus_space_read_2(t, h, offset));
248 data = le32toh(bus_space_read_4(t, h, offset));
258 generic_pcie_write_config(device_t dev, u_int bus, u_int slot,
259 u_int func, u_int reg, uint32_t val, int bytes)
261 struct generic_pcie_core_softc *sc;
262 bus_space_handle_t h;
266 if ((bus > PCI_BUSMAX) || (slot > PCI_SLOTMAX) ||
267 (func > PCI_FUNCMAX) || (reg > PCIE_REGMAX))
270 sc = device_get_softc(dev);
272 offset = PCIE_ADDR_OFFSET(bus, slot, func, reg);
279 bus_space_write_1(t, h, offset, val);
282 bus_space_write_2(t, h, offset, htole16(val));
285 bus_space_write_4(t, h, offset, htole32(val));
293 generic_pcie_maxslots(device_t dev)
296 return (31); /* max slots per bus acc. to standard */
300 generic_pcie_read_ivar(device_t dev, device_t child, int index,
303 struct generic_pcie_core_softc *sc;
306 sc = device_get_softc(dev);
308 if (index == PCIB_IVAR_BUS) {
309 /* this pcib adds only pci bus 0 as child */
311 *result = secondary_bus;
316 if (index == PCIB_IVAR_DOMAIN) {
322 device_printf(dev, "ERROR: Unknown index %d.\n", index);
327 generic_pcie_write_ivar(device_t dev, device_t child, int index,
335 generic_pcie_rman(struct generic_pcie_core_softc *sc, int type)
340 return (&sc->io_rman);
342 return (&sc->mem_rman);
351 pci_host_generic_core_release_resource(device_t dev, device_t child, int type,
352 int rid, struct resource *res)
354 struct generic_pcie_core_softc *sc;
357 sc = device_get_softc(dev);
359 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
360 if (type == PCI_RES_BUS) {
361 return (pci_domain_release_bus(sc->ecam, child, rid, res));
365 rm = generic_pcie_rman(sc, type);
367 KASSERT(rman_is_region_manager(res, rm), ("rman mismatch"));
368 rman_release_resource(res);
371 return (bus_generic_release_resource(dev, child, type, rid, res));
375 pci_host_generic_core_alloc_resource(device_t dev, device_t child, int type,
376 int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
378 struct generic_pcie_core_softc *sc;
379 struct resource *res;
382 sc = device_get_softc(dev);
384 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
385 if (type == PCI_RES_BUS) {
386 return (pci_domain_alloc_bus(sc->ecam, child, rid, start, end,
391 rm = generic_pcie_rman(sc, type);
393 return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
394 type, rid, start, end, count, flags));
398 "rman_reserve_resource: start=%#jx, end=%#jx, count=%#jx\n",
402 res = rman_reserve_resource(rm, start, end, count, flags, child);
406 rman_set_rid(res, *rid);
408 if (flags & RF_ACTIVE)
409 if (bus_activate_resource(child, type, *rid, res)) {
410 rman_release_resource(res);
417 device_printf(dev, "%s FAIL: type=%d, rid=%d, "
418 "start=%016jx, end=%016jx, count=%016jx, flags=%x\n",
419 __func__, type, *rid, start, end, count, flags);
425 generic_pcie_adjust_resource(device_t dev, device_t child, int type,
426 struct resource *res, rman_res_t start, rman_res_t end)
428 struct generic_pcie_core_softc *sc;
431 sc = device_get_softc(dev);
432 #if defined(NEW_PCIB) && defined(PCI_RES_BUS)
433 if (type == PCI_RES_BUS)
434 return (pci_domain_adjust_bus(sc->ecam, child, res, start,
438 rm = generic_pcie_rman(sc, type);
440 return (rman_adjust_resource(res, start, end));
441 return (bus_generic_adjust_resource(dev, child, type, res, start, end));
445 generic_pcie_get_dma_tag(device_t dev, device_t child)
447 struct generic_pcie_core_softc *sc;
449 sc = device_get_softc(dev);
453 static device_method_t generic_pcie_methods[] = {
454 DEVMETHOD(device_attach, pci_host_generic_core_attach),
455 DEVMETHOD(bus_read_ivar, generic_pcie_read_ivar),
456 DEVMETHOD(bus_write_ivar, generic_pcie_write_ivar),
457 DEVMETHOD(bus_alloc_resource, pci_host_generic_core_alloc_resource),
458 DEVMETHOD(bus_adjust_resource, generic_pcie_adjust_resource),
459 DEVMETHOD(bus_release_resource, pci_host_generic_core_release_resource),
460 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
461 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
463 DEVMETHOD(bus_get_dma_tag, generic_pcie_get_dma_tag),
466 DEVMETHOD(pcib_maxslots, generic_pcie_maxslots),
467 DEVMETHOD(pcib_read_config, generic_pcie_read_config),
468 DEVMETHOD(pcib_write_config, generic_pcie_write_config),
473 DEFINE_CLASS_0(pcib, generic_pcie_core_driver,
474 generic_pcie_methods, sizeof(struct generic_pcie_core_softc));
476 #if defined(__aarch64__)
477 static void thunderx2_ahci_bar_quirk(device_t dev)
482 * On ThunderX2, AHCI BAR2 address is wrong. It needs to precisely
483 * match the one described in datasheet. Fixup it unconditionally.
485 if (device_get_unit(dev) == 0) {
486 device_printf(dev, "running AHCI BAR fixup\n");
487 PCIB_WRITE_CONFIG(dev, 0, 16, 0, 0x18, 0x01440000, 4);
488 PCIB_WRITE_CONFIG(dev, 0, 16, 0, 0x1c, 0x40, 4);
489 PCIB_WRITE_CONFIG(dev, 0, 16, 1, 0x18, 0x01450000, 4);
490 PCIB_WRITE_CONFIG(dev, 0, 16, 1, 0x1c, 0x40, 4);