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 *);
61 static int mps_alloc_msix(struct mps_softc *sc, int msgs);
62 static int mps_alloc_msi(struct mps_softc *sc, int msgs);
64 int mps_disable_msix = 0;
65 TUNABLE_INT("hw.mps.disable_msix", &mps_disable_msix);
66 SYSCTL_INT(_hw_mps, OID_AUTO, disable_msix, CTLFLAG_RD, &mps_disable_msix, 0,
67 "Disable MSIX interrupts\n");
68 int mps_disable_msi = 0;
69 TUNABLE_INT("hw.mps.disable_msi", &mps_disable_msi);
70 SYSCTL_INT(_hw_mps, OID_AUTO, disable_msi, CTLFLAG_RD, &mps_disable_msi, 0,
71 "Disable MSI interrupts\n");
73 static device_method_t mps_methods[] = {
74 DEVMETHOD(device_probe, mps_pci_probe),
75 DEVMETHOD(device_attach, mps_pci_attach),
76 DEVMETHOD(device_detach, mps_pci_detach),
77 DEVMETHOD(device_suspend, mps_pci_suspend),
78 DEVMETHOD(device_resume, mps_pci_resume),
79 DEVMETHOD(bus_print_child, bus_generic_print_child),
80 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
84 static driver_t mps_pci_driver = {
87 sizeof(struct mps_softc)
90 static devclass_t mps_devclass;
91 DRIVER_MODULE(mps, pci, mps_pci_driver, mps_devclass, NULL, NULL);
100 } mps_identifiers[] = {
101 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2004,
102 0xffff, 0xffff, 0, "LSI SAS2004" },
103 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2008,
104 0xffff, 0xffff, 0, "LSI SAS2008" },
105 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_1,
106 0xffff, 0xffff, 0, "LSI SAS2108" },
107 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_2,
108 0xffff, 0xffff, 0, "LSI SAS2108" },
109 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2108_3,
110 0xffff, 0xffff, 0, "LSI SAS2108" },
111 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_1,
112 0xffff, 0xffff, 0, "LSI SAS2116" },
113 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2116_2,
114 0xffff, 0xffff, 0, "LSI SAS2116" },
115 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_1,
116 0xffff, 0xffff, 0, "LSI SAS2208" },
117 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_2,
118 0xffff, 0xffff, 0, "LSI SAS2208" },
119 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_3,
120 0xffff, 0xffff, 0, "LSI SAS2208" },
121 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_4,
122 0xffff, 0xffff, 0, "LSI SAS2208" },
123 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_5,
124 0xffff, 0xffff, 0, "LSI SAS2208" },
125 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_6,
126 0xffff, 0xffff, 0, "LSI SAS2208" },
127 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_7,
128 0xffff, 0xffff, 0, "LSI SAS2208" },
129 { MPI2_MFGPAGE_VENDORID_LSI, MPI2_MFGPAGE_DEVID_SAS2208_8,
130 0xffff, 0xffff, 0, "LSI SAS2208" },
131 { 0, 0, 0, 0, 0, NULL }
134 static struct mps_ident *
135 mps_find_ident(device_t dev)
139 for (m = mps_identifiers; m->vendor != 0; m++) {
140 if (m->vendor != pci_get_vendor(dev))
142 if (m->device != pci_get_device(dev))
144 if ((m->subvendor != 0xffff) &&
145 (m->subvendor != pci_get_subvendor(dev)))
147 if ((m->subdevice != 0xffff) &&
148 (m->subdevice != pci_get_subdevice(dev)))
157 mps_pci_probe(device_t dev)
159 struct mps_ident *id;
161 if ((id = mps_find_ident(dev)) != NULL) {
162 device_set_desc(dev, id->desc);
163 return (BUS_PROBE_DEFAULT);
169 mps_pci_attach(device_t dev)
171 struct mps_softc *sc;
176 sc = device_get_softc(dev);
177 bzero(sc, sizeof(*sc));
179 m = mps_find_ident(dev);
180 sc->mps_flags = m->flags;
182 /* Twiddle basic PCI config bits for a sanity check */
183 command = pci_read_config(dev, PCIR_COMMAND, 2);
184 command |= PCIM_CMD_BUSMASTEREN;
185 pci_write_config(dev, PCIR_COMMAND, command, 2);
186 command = pci_read_config(dev, PCIR_COMMAND, 2);
187 if ((command & PCIM_CMD_BUSMASTEREN) == 0) {
188 device_printf(dev, "Cannot enable PCI busmaster\n");
191 if ((command & PCIM_CMD_MEMEN) == 0) {
192 device_printf(dev, "PCI memory window not available\n");
196 /* Allocate the System Interface Register Set */
197 sc->mps_regs_rid = PCIR_BAR(1);
198 if ((sc->mps_regs_resource = bus_alloc_resource_any(dev,
199 SYS_RES_MEMORY, &sc->mps_regs_rid, RF_ACTIVE)) == NULL) {
200 device_printf(dev, "Cannot allocate PCI registers\n");
203 sc->mps_btag = rman_get_bustag(sc->mps_regs_resource);
204 sc->mps_bhandle = rman_get_bushandle(sc->mps_regs_resource);
206 /* Allocate the parent DMA tag */
207 if (bus_dma_tag_create( NULL, /* parent */
208 1, 0, /* algnmnt, boundary */
209 BUS_SPACE_MAXADDR, /* lowaddr */
210 BUS_SPACE_MAXADDR, /* highaddr */
211 NULL, NULL, /* filter, filterarg */
212 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */
213 BUS_SPACE_UNRESTRICTED, /* nsegments */
214 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */
216 &sc->mps_parent_dmat)) {
217 device_printf(dev, "Cannot allocate parent DMA tag\n");
222 if ((error = mps_attach(sc)) != 0)
229 mps_pci_setup_interrupts(struct mps_softc *sc)
236 if ((mps_disable_msix == 0) &&
237 ((msgs = pci_msix_count(dev)) >= MPS_MSI_COUNT))
238 error = mps_alloc_msix(sc, MPS_MSI_COUNT);
239 if ((error != 0) && (mps_disable_msi == 0) &&
240 ((msgs = pci_msi_count(dev)) >= MPS_MSI_COUNT))
241 error = mps_alloc_msi(sc, MPS_MSI_COUNT);
244 sc->mps_flags |= MPS_FLAGS_INTX;
245 sc->mps_irq_rid[0] = 0;
246 sc->mps_irq[0] = bus_alloc_resource_any(dev, SYS_RES_IRQ,
247 &sc->mps_irq_rid[0], RF_SHAREABLE | RF_ACTIVE);
248 if (sc->mps_irq[0] == NULL) {
249 device_printf(dev, "Cannot allocate INTx interrupt\n");
252 error = bus_setup_intr(dev, sc->mps_irq[0],
253 INTR_MPSAFE, mps_intr, sc,
254 &sc->mps_intrhand[0], NULL);
256 device_printf(dev, "Cannot setup INTx interrupt\n");
258 sc->mps_flags |= MPS_FLAGS_MSI;
259 for (i = 0; i < MPS_MSI_COUNT; i++) {
260 sc->mps_irq_rid[i] = i + 1;
261 sc->mps_irq[i] = bus_alloc_resource_any(dev,
262 SYS_RES_IRQ, &sc->mps_irq_rid[i], RF_ACTIVE);
263 if (sc->mps_irq[i] == NULL) {
265 "Cannot allocate MSI interrupt\n");
268 error = bus_setup_intr(dev, sc->mps_irq[i],
269 INTR_MPSAFE, mps_intr_msi,
270 sc, &sc->mps_intrhand[i], NULL);
273 "Cannot setup MSI interrupt %d\n", i);
283 mps_pci_detach(device_t dev)
285 struct mps_softc *sc;
288 sc = device_get_softc(dev);
290 if ((error = mps_free(sc)) != 0)
298 mps_pci_free(struct mps_softc *sc)
302 if (sc->mps_parent_dmat != NULL) {
303 bus_dma_tag_destroy(sc->mps_parent_dmat);
306 if (sc->mps_flags & MPS_FLAGS_MSI) {
307 for (i = 0; i < MPS_MSI_COUNT; i++) {
308 if (sc->mps_irq[i] != NULL) {
309 bus_teardown_intr(sc->mps_dev, sc->mps_irq[i],
310 sc->mps_intrhand[i]);
311 bus_release_resource(sc->mps_dev, SYS_RES_IRQ,
312 sc->mps_irq_rid[i], sc->mps_irq[i]);
315 pci_release_msi(sc->mps_dev);
318 if (sc->mps_flags & MPS_FLAGS_INTX) {
319 bus_teardown_intr(sc->mps_dev, sc->mps_irq[0],
320 sc->mps_intrhand[0]);
321 bus_release_resource(sc->mps_dev, SYS_RES_IRQ,
322 sc->mps_irq_rid[0], sc->mps_irq[0]);
325 if (sc->mps_regs_resource != NULL) {
326 bus_release_resource(sc->mps_dev, SYS_RES_MEMORY,
327 sc->mps_regs_rid, sc->mps_regs_resource);
334 mps_pci_suspend(device_t dev)
340 mps_pci_resume(device_t dev)
346 mps_alloc_msix(struct mps_softc *sc, int msgs)
350 error = pci_alloc_msix(sc->mps_dev, &msgs);
355 mps_alloc_msi(struct mps_softc *sc, int msgs)
359 error = pci_alloc_msi(sc->mps_dev, &msgs);