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Add error interrupt handler for Freescale PCI errors

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This eliminates a 'interrupt storm' warning spam with the P5020.

Obtained from:	Semihalf
This commit is contained in:
jhibbits 2016-01-03 15:24:57 +00:00
parent 9e2574043b
commit f77e82d7d2
1 changed files with 112 additions and 1 deletions
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113
sys/powerpc/mpc85xx/pci_mpc85xx.c
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@ -94,6 +94,29 @@ __FBSDID("$FreeBSD$");
#define REG_PEX_ERR_DR 0x0e00
#define REG_PEX_ERR_EN 0x0e08
#define REG_PEX_ERR_DR 0x0e00
#define REG_PEX_ERR_DR_ME 0x80000000
#define REG_PEX_ERR_DR_PCT 0x800000
#define REG_PEX_ERR_DR_PAT 0x400000
#define REG_PEX_ERR_DR_PCAC 0x200000
#define REG_PEX_ERR_DR_PNM 0x100000
#define REG_PEX_ERR_DR_CDNSC 0x80000
#define REG_PEX_ERR_DR_CRSNC 0x40000
#define REG_PEX_ERR_DR_ICCA 0x20000
#define REG_PEX_ERR_DR_IACA 0x10000
#define REG_PEX_ERR_DR_CRST 0x8000
#define REG_PEX_ERR_DR_MIS 0x4000
#define REG_PEX_ERR_DR_IOIS 0x2000
#define REG_PEX_ERR_DR_CIS 0x1000
#define REG_PEX_ERR_DR_CIEP 0x800
#define REG_PEX_ERR_DR_IOIEP 0x400
#define REG_PEX_ERR_DR_OAC 0x200
#define REG_PEX_ERR_DR_IOIA 0x100
#define REG_PEX_ERR_DR_IMBA 0x80
#define REG_PEX_ERR_DR_IIOBA 0x40
#define REG_PEX_ERR_DR_LDDE 0x20
#define REG_PEX_ERR_EN 0x0e08
#define PCIR_LTSSM 0x404
#define LTSSM_STAT_L0 0x16
@ -113,6 +136,9 @@ struct fsl_pcib_softc {
bus_space_tag_t sc_bst;
int sc_rid;
struct resource *sc_irq_res;
void *sc_ih;
int sc_busnr;
int sc_pcie;
uint8_t sc_pcie_capreg; /* PCI-E Capability Reg Set */
@ -122,6 +148,34 @@ struct fsl_pcib_softc {
int sc_devfn_via_ide;
};
struct fsl_pcib_err_dr {
const char *msg;
uint32_t err_dr_mask;
};
static const struct fsl_pcib_err_dr pci_err[] = {
{"ME", REG_PEX_ERR_DR_ME},
{"PCT", REG_PEX_ERR_DR_PCT},
{"PAT", REG_PEX_ERR_DR_PAT},
{"PCAC", REG_PEX_ERR_DR_PCAC},
{"PNM", REG_PEX_ERR_DR_PNM},
{"CDNSC", REG_PEX_ERR_DR_CDNSC},
{"CRSNC", REG_PEX_ERR_DR_CRSNC},
{"ICCA", REG_PEX_ERR_DR_ICCA},
{"IACA", REG_PEX_ERR_DR_IACA},
{"CRST", REG_PEX_ERR_DR_CRST},
{"MIS", REG_PEX_ERR_DR_MIS},
{"IOIS", REG_PEX_ERR_DR_IOIS},
{"CIS", REG_PEX_ERR_DR_CIS},
{"CIEP", REG_PEX_ERR_DR_CIEP},
{"IOIEP", REG_PEX_ERR_DR_IOIEP},
{"OAC", REG_PEX_ERR_DR_OAC},
{"IOIA", REG_PEX_ERR_DR_IOIA},
{"IMBA", REG_PEX_ERR_DR_IMBA},
{"IIOBA", REG_PEX_ERR_DR_IIOBA},
{"LDDE", REG_PEX_ERR_DR_LDDE}
};
/* Local forward declerations. */
static uint32_t fsl_pcib_cfgread(struct fsl_pcib_softc *, u_int, u_int, u_int,
u_int, int);
@ -172,6 +226,35 @@ DEFINE_CLASS_1(pcib, fsl_pcib_driver, fsl_pcib_methods,
sizeof(struct fsl_pcib_softc), ofw_pci_driver);
DRIVER_MODULE(pcib, ofwbus, fsl_pcib_driver, fsl_pcib_devclass, 0, 0);
static int
fsl_pcib_err_intr(void *v)
{
struct fsl_pcib_softc *sc;
device_t dev;
uint32_t err_reg, clear_reg;
uint8_t i;
dev = (device_t)v;
sc = device_get_softc(dev);
clear_reg = 0;
err_reg = bus_space_read_4(sc->sc_bst, sc->sc_bsh, REG_PEX_ERR_DR);
/* Check which one error occurred */
for (i = 0; i < sizeof(pci_err)/sizeof(struct fsl_pcib_err_dr); i++) {
if (err_reg & pci_err[i].err_dr_mask) {
device_printf(dev, "PCI %d: report %s error\n",
device_get_unit(dev), pci_err[i].msg);
clear_reg |= pci_err[i].err_dr_mask;
}
}
/* Clear pending errors */
bus_space_write_4(sc->sc_bst, sc->sc_bsh, REG_PEX_ERR_DR, clear_reg);
return (0);
}
static int
fsl_pcib_probe(device_t dev)
{
@ -198,7 +281,7 @@ fsl_pcib_attach(device_t dev)
struct fsl_pcib_softc *sc;
phandle_t node;
uint32_t cfgreg;
int maxslot, error;
int error, maxslot, rid;
uint8_t ltssm, capptr;
sc = device_get_softc(dev);
@ -279,6 +362,34 @@ fsl_pcib_attach(device_t dev)
}
}
/* Allocate irq */
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE | RF_SHAREABLE);
if (sc->sc_irq_res == NULL) {
error = fsl_pcib_detach(dev);
if (error != 0) {
device_printf(dev,
"Detach of the driver failed with error %d\n",
error);
}
return (ENXIO);
}
/* Setup interrupt handler */
error = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
NULL, (driver_intr_t *)fsl_pcib_err_intr, dev, &sc->sc_ih);
if (error != 0) {
device_printf(dev, "Could not setup irq, %d\n", error);
sc->sc_ih = NULL;
error = fsl_pcib_detach(dev);
if (error != 0) {
device_printf(dev,
"Detach of the driver failed with error %d\n",
error);
}
return (ENXIO);
}
fsl_pcib_err_init(dev);
return (ofw_pci_attach(dev));