2 * Copyright (c) 2009 Yahoo! Inc.
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26 * $FreeBSD: src/sys/dev/mps/mps_pci.c,v 1.2 2010/11/30 22:39:46 ken Exp $
29 /* PCI/PCI-X/PCIe bus interface for the LSI MPT2 controllers */
31 #include <sys/types.h>
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
38 #include <sys/malloc.h>
39 #include <sys/sysctl.h>
45 #include <bus/pci/pcireg.h>
46 #include <bus/pci/pcivar.h>
48 #include <dev/disk/mps/mpi/mpi2_type.h>
49 #include <dev/disk/mps/mpi/mpi2.h>
50 #include <dev/disk/mps/mpi/mpi2_ioc.h>
51 #include <dev/disk/mps/mpi/mpi2_cnfg.h>
53 #include <dev/disk/mps/mpsvar.h>
55 static int mps_pci_probe(device_t);
56 static int mps_pci_attach(device_t);
57 static int mps_pci_detach(device_t);
58 static int mps_pci_suspend(device_t);
59 static int mps_pci_resume(device_t);
60 static void mps_pci_free(struct mps_softc *);
62 static int mps_alloc_msix(struct mps_softc *sc, int msgs);
63 static int mps_alloc_msi(struct mps_softc *sc, int msgs);
66 int mps_disable_msix = 0;
67 TUNABLE_INT("hw.mps.disable_msix", &mps_disable_msix);
68 SYSCTL_INT(_hw_mps, OID_AUTO, disable_msix, CTLFLAG_RD, &mps_disable_msix, 0,
69 "Disable MSIX interrupts\n");
70 int mps_disable_msi = 0;
71 TUNABLE_INT("hw.mps.disable_msi", &mps_disable_msi);
72 SYSCTL_INT(_hw_mps, OID_AUTO, disable_msi, CTLFLAG_RD, &mps_disable_msi, 0,
73 "Disable MSI interrupts\n");
75 static device_method_t mps_methods[] = {
76 DEVMETHOD(device_probe, mps_pci_probe),
77 DEVMETHOD(device_attach, mps_pci_attach),
78 DEVMETHOD(device_detach, mps_pci_detach),
79 DEVMETHOD(device_suspend, mps_pci_suspend),
80 DEVMETHOD(device_resume, mps_pci_resume),
81 DEVMETHOD(bus_print_child, bus_generic_print_child),
82 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
86 static driver_t mps_pci_driver = {
89 sizeof(struct mps_softc)
92 static devclass_t mps_devclass;
93 DRIVER_MODULE(mps, pci, mps_pci_driver, mps_devclass, NULL, NULL);
102 } mps_identifiers[] = {
103 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2004,
104 0xffff, 0xffff, 0, "LSI SAS2004" },
105 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2008,
106 0xffff, 0xffff, 0, "LSI SAS2008" },
107 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_1,
108 0xffff, 0xffff, 0, "LSI SAS2108" },
109 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_2,
110 0xffff, 0xffff, 0, "LSI SAS2108" },
111 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_3,
112 0xffff, 0xffff, 0, "LSI SAS2108" },
113 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_1,
114 0xffff, 0xffff, 0, "LSI SAS2116" },
115 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_2,
116 0xffff, 0xffff, 0, "LSI SAS2116" },
117 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_1,
118 0xffff, 0xffff, 0, "LSI SAS2208" },
119 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_2,
120 0xffff, 0xffff, 0, "LSI SAS2208" },
121 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_3,
122 0xffff, 0xffff, 0, "LSI SAS2208" },
123 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_4,
124 0xffff, 0xffff, 0, "LSI SAS2208" },
125 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_5,
126 0xffff, 0xffff, 0, "LSI SAS2208" },
127 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_6,
128 0xffff, 0xffff, 0, "LSI SAS2208" },
129 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_7,
130 0xffff, 0xffff, 0, "LSI SAS2208" },
131 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_8,
132 0xffff, 0xffff, 0, "LSI SAS2208" },
133 { 0, 0, 0, 0, 0, NULL }
136 static struct mps_ident *
137 mps_find_ident(device_t dev)
141 for (m = mps_identifiers; m->vendor != 0; m++) {
142 if (m->vendor != pci_get_vendor(dev))
144 if (m->device != pci_get_device(dev))
146 if ((m->subvendor != 0xffff) &&
147 (m->subvendor != pci_get_subvendor(dev)))
149 if ((m->subdevice != 0xffff) &&
150 (m->subdevice != pci_get_subdevice(dev)))
159 mps_pci_probe(device_t dev)
161 struct mps_ident *id;
163 if ((id = mps_find_ident(dev)) != NULL) {
164 device_set_desc(dev, id->desc);
165 return (BUS_PROBE_DEFAULT);
171 mps_pci_attach(device_t dev)
173 struct mps_softc *sc;
178 sc = device_get_softc(dev);
179 bzero(sc, sizeof(*sc));
181 m = mps_find_ident(dev);
182 sc->mps_flags = m->flags;
184 /* Twiddle basic PCI config bits for a sanity check */
185 command = pci_read_config(dev, PCIR_COMMAND, 2);
186 command |= PCIM_CMD_BUSMASTEREN;
187 pci_write_config(dev, PCIR_COMMAND, command, 2);
188 command = pci_read_config(dev, PCIR_COMMAND, 2);
189 if ((command & PCIM_CMD_BUSMASTEREN) == 0) {
190 device_printf(dev, "Cannot enable PCI busmaster\n");
193 if ((command & PCIM_CMD_MEMEN) == 0) {
194 device_printf(dev, "PCI memory window not available\n");
198 /* Allocate the System Interface Register Set */
199 sc->mps_regs_rid = PCIR_BAR(1);
200 if ((sc->mps_regs_resource = bus_alloc_resource_any(dev,
201 SYS_RES_MEMORY, &sc->mps_regs_rid, RF_ACTIVE)) == NULL) {
202 device_printf(dev, "Cannot allocate PCI registers\n");
205 sc->mps_btag = rman_get_bustag(sc->mps_regs_resource);
206 sc->mps_bhandle = rman_get_bushandle(sc->mps_regs_resource);
208 /* Allocate the parent DMA tag */
209 if (bus_dma_tag_create( NULL, /* parent */
210 1, 0, /* algnmnt, boundary */
211 BUS_SPACE_MAXADDR, /* lowaddr */
212 BUS_SPACE_MAXADDR, /* highaddr */
213 NULL, NULL, /* filter, filterarg */
214 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
215 BUS_SPACE_UNRESTRICTED, /* nsegments */
216 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
218 &sc->mps_parent_dmat)) {
219 device_printf(dev, "Cannot allocate parent DMA tag\n");
224 if ((error = mps_attach(sc)) != 0)
231 mps_pci_setup_interrupts(struct mps_softc *sc)
242 if ((mps_disable_msix == 0) &&
243 ((msgs = pci_msix_count(dev)) >= MPS_MSI_COUNT))
244 error = mps_alloc_msix(sc, MPS_MSI_COUNT);
245 if ((error != 0) && (mps_disable_msi == 0) &&
246 ((msgs = pci_msi_count(dev)) >= MPS_MSI_COUNT))
247 error = mps_alloc_msi(sc, MPS_MSI_COUNT);
251 sc->mps_flags |= MPS_FLAGS_INTX;
252 sc->mps_irq_rid[0] = 0;
253 sc->mps_irq[0] = bus_alloc_resource_any(dev, SYS_RES_IRQ,
254 &sc->mps_irq_rid[0], RF_SHAREABLE | RF_ACTIVE);
255 if (sc->mps_irq[0] == NULL) {
256 device_printf(dev, "Cannot allocate INTx interrupt\n");
259 error = bus_setup_intr(dev, sc->mps_irq[0],
260 INTR_MPSAFE, mps_intr, sc,
261 &sc->mps_intrhand[0], NULL);
263 device_printf(dev, "Cannot setup INTx interrupt\n");
265 sc->mps_flags |= MPS_FLAGS_MSI;
266 for (i = 0; i < MPS_MSI_COUNT; i++) {
267 sc->mps_irq_rid[i] = i + 1;
268 sc->mps_irq[i] = bus_alloc_resource_any(dev,
269 SYS_RES_IRQ, &sc->mps_irq_rid[i], RF_ACTIVE);
270 if (sc->mps_irq[i] == NULL) {
272 "Cannot allocate MSI interrupt\n");
275 error = bus_setup_intr(dev, sc->mps_irq[i],
276 INTR_MPSAFE, mps_intr_msi,
277 sc, &sc->mps_intrhand[i], NULL);
280 "Cannot setup MSI interrupt %d\n", i);
290 mps_pci_detach(device_t dev)
292 struct mps_softc *sc;
295 sc = device_get_softc(dev);
297 if ((error = mps_free(sc)) != 0)
305 mps_pci_free(struct mps_softc *sc)
309 if (sc->mps_parent_dmat != NULL) {
310 bus_dma_tag_destroy(sc->mps_parent_dmat);
313 if (sc->mps_flags & MPS_FLAGS_MSI) {
314 for (i = 0; i < MPS_MSI_COUNT; i++) {
315 if (sc->mps_irq[i] != NULL) {
316 bus_teardown_intr(sc->mps_dev, sc->mps_irq[i],
317 sc->mps_intrhand[i]);
318 bus_release_resource(sc->mps_dev, SYS_RES_IRQ,
319 sc->mps_irq_rid[i], sc->mps_irq[i]);
322 pci_release_msi(sc->mps_dev);
325 if (sc->mps_flags & MPS_FLAGS_INTX) {
326 bus_teardown_intr(sc->mps_dev, sc->mps_irq[0],
327 sc->mps_intrhand[0]);
328 bus_release_resource(sc->mps_dev, SYS_RES_IRQ,
329 sc->mps_irq_rid[0], sc->mps_irq[0]);
332 if (sc->mps_regs_resource != NULL) {
333 bus_release_resource(sc->mps_dev, SYS_RES_MEMORY,
334 sc->mps_regs_rid, sc->mps_regs_resource);
341 mps_pci_suspend(device_t dev)
347 mps_pci_resume(device_t dev)
354 mps_alloc_msix(struct mps_softc *sc, int msgs)
358 error = pci_alloc_msix(sc->mps_dev, &msgs);
363 mps_alloc_msi(struct mps_softc *sc, int msgs)
367 error = pci_alloc_msi(sc->mps_dev, &msgs);