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author | Jan Glauber <jang@linux.vnet.ibm.com> | 2012-11-29 13:34:48 (GMT) |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-30 16:47:24 (GMT) |
commit | cbc0dd1f856b52b59c2c73a477b6cb210c8c66ad (patch) | |
tree | 064ceb4d1b2acb8716867b2a3fb65ae05bef1a31 /arch/s390/pci/pci_event.c | |
parent | 828b35f60eb0148f994bb13e328df94578b07142 (diff) | |
download | linux-fsl-qoriq-cbc0dd1f856b52b59c2c73a477b6cb210c8c66ad.tar.xz |
s390/pci: CHSC PCI support for error and availability events
Add CHSC store-event-information support for PCI (notfication type 2)
and report error and availability events to the PCI architecture layer.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci/pci_event.c')
-rw-r--r-- | arch/s390/pci/pci_event.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c new file mode 100644 index 0000000..dbed8cd --- /dev/null +++ b/arch/s390/pci/pci_event.c @@ -0,0 +1,93 @@ +/* + * Copyright IBM Corp. 2012 + * + * Author(s): + * Jan Glauber <jang@linux.vnet.ibm.com> + */ + +#define COMPONENT "zPCI" +#define pr_fmt(fmt) COMPONENT ": " fmt + +#include <linux/kernel.h> +#include <linux/pci.h> + +/* Content Code Description for PCI Function Error */ +struct zpci_ccdf_err { + u32 reserved1; + u32 fh; /* function handle */ + u32 fid; /* function id */ + u32 ett : 4; /* expected table type */ + u32 mvn : 12; /* MSI vector number */ + u32 dmaas : 8; /* DMA address space */ + u32 : 6; + u32 q : 1; /* event qualifier */ + u32 rw : 1; /* read/write */ + u64 faddr; /* failing address */ + u32 reserved3; + u16 reserved4; + u16 pec; /* PCI event code */ +} __packed; + +/* Content Code Description for PCI Function Availability */ +struct zpci_ccdf_avail { + u32 reserved1; + u32 fh; /* function handle */ + u32 fid; /* function id */ + u32 reserved2; + u32 reserved3; + u32 reserved4; + u32 reserved5; + u16 reserved6; + u16 pec; /* PCI event code */ +} __packed; + +static void zpci_event_log_err(struct zpci_ccdf_err *ccdf) +{ + struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid); + + dev_err(&zdev->pdev->dev, "event code: 0x%x\n", ccdf->pec); +} + +static void zpci_event_log_avail(struct zpci_ccdf_avail *ccdf) +{ + struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid); + + pr_err("%s%s: availability event: fh: 0x%x fid: 0x%x event code: 0x%x reason:", + (zdev) ? dev_driver_string(&zdev->pdev->dev) : "?", + (zdev) ? dev_name(&zdev->pdev->dev) : "?", + ccdf->fh, ccdf->fid, ccdf->pec); + print_hex_dump(KERN_CONT, "ccdf", DUMP_PREFIX_OFFSET, + 16, 1, ccdf, sizeof(*ccdf), false); + + switch (ccdf->pec) { + case 0x0301: + zpci_enable_device(zdev); + break; + case 0x0302: + clp_add_pci_device(ccdf->fid, ccdf->fh, 0); + break; + case 0x0306: + clp_find_pci_devices(); + break; + default: + break; + } +} + +void zpci_event_error(void *data) +{ + struct zpci_ccdf_err *ccdf = data; + struct zpci_dev *zdev; + + zpci_event_log_err(ccdf); + zdev = get_zdev_by_fid(ccdf->fid); + if (!zdev) { + pr_err("Error event for unknown fid: %x", ccdf->fid); + return; + } +} + +void zpci_event_availability(void *data) +{ + zpci_event_log_avail(data); +} |