From 12283a4035691697977083a5ac1e00ad5cfa6a3d Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Fri, 27 Nov 2015 11:18:02 +0100 Subject: [PATCH] s390/sclp: add error notification command Add SCLP event 24 "Adapter-error notification". Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/sclp.h | 13 ++++ drivers/s390/char/sclp.h | 2 + drivers/s390/char/sclp_pci.c | 120 ++++++++++++++++++++++++++++++++++- 3 files changed, 133 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index bab456be9a4f..bd7893d274fa 100644 --- a/arch/s390/include/asm/sclp.h +++ b/arch/s390/include/asm/sclp.h @@ -72,6 +72,18 @@ struct sclp_info { }; extern struct sclp_info sclp; +struct zpci_report_error_header { + u8 version; /* Interface version byte */ + u8 action; /* Action qualifier byte + * 1: Deconfigure and repair action requested + * (OpenCrypto Problem Call Home) + * 2: Informational Report + * (OpenCrypto Successful Diagnostics Execution) + */ + u16 length; /* Length of Subsequent Data (up to 4K – SCLP header */ + u8 data[0]; /* Subsequent Data passed verbatim to SCLP ET 24 */ +} __packed; + int sclp_get_core_info(struct sclp_core_info *info); int sclp_core_configure(u8 core); int sclp_core_deconfigure(u8 core); @@ -83,6 +95,7 @@ int sclp_chp_read_info(struct sclp_chp_info *info); void sclp_get_ipl_info(struct sclp_ipl_info *info); int sclp_pci_configure(u32 fid); int sclp_pci_deconfigure(u32 fid); +int sclp_pci_report(struct zpci_report_error_header *report, u32 fh, u32 fid); int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count); int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count); void sclp_early_detect(void); diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h index 026e38990952..6079efa95eaa 100644 --- a/drivers/s390/char/sclp.h +++ b/drivers/s390/char/sclp.h @@ -22,6 +22,7 @@ #define EVTYP_DIAG_TEST 0x07 #define EVTYP_STATECHANGE 0x08 #define EVTYP_PMSGCMD 0x09 +#define EVTYP_ERRNOTIFY 0x18 #define EVTYP_CNTLPROGOPCMD 0x20 #define EVTYP_CNTLPROGIDENT 0x0B #define EVTYP_SIGQUIESCE 0x1D @@ -36,6 +37,7 @@ #define EVTYP_DIAG_TEST_MASK 0x02000000 #define EVTYP_STATECHANGE_MASK 0x01000000 #define EVTYP_PMSGCMD_MASK 0x00800000 +#define EVTYP_ERRNOTIFY_MASK 0x00000100 #define EVTYP_CTLPROGOPCMD_MASK 0x00000001 #define EVTYP_CTLPROGIDENT_MASK 0x00200000 #define EVTYP_SIGQUIESCE_MASK 0x00000008 diff --git a/drivers/s390/char/sclp_pci.c b/drivers/s390/char/sclp_pci.c index 943e92539e65..0c8973c45b48 100644 --- a/drivers/s390/char/sclp_pci.c +++ b/drivers/s390/char/sclp_pci.c @@ -8,6 +8,7 @@ #include #include +#include #include #include #include @@ -20,7 +21,29 @@ #define SCLP_CMDW_CONFIGURE_PCI 0x001a0001 #define SCLP_CMDW_DECONFIGURE_PCI 0x001b0001 -#define SCLP_RECONFIG_PCI_ATPYE 2 +#define SCLP_ATYPE_PCI 2 + +#define SCLP_ERRNOTIFY_AQ_REPAIR 1 +#define SCLP_ERRNOTIFY_AQ_INFO_LOG 2 + +static DEFINE_MUTEX(sclp_pci_mutex); +static struct sclp_register sclp_pci_event = { + .send_mask = EVTYP_ERRNOTIFY_MASK, +}; + +struct err_notify_evbuf { + struct evbuf_header header; + u8 action; + u8 atype; + u32 fh; + u32 fid; + u8 data[0]; +} __packed; + +struct err_notify_sccb { + struct sccb_header header; + struct err_notify_evbuf evbuf; +} __packed; struct pci_cfg_sccb { struct sccb_header header; @@ -43,7 +66,7 @@ static int do_pci_configure(sclp_cmdw_t cmd, u32 fid) return -ENOMEM; sccb->header.length = PAGE_SIZE; - sccb->atype = SCLP_RECONFIG_PCI_ATPYE; + sccb->atype = SCLP_ATYPE_PCI; sccb->aid = fid; rc = sclp_sync_request(cmd, sccb); if (rc) @@ -74,3 +97,96 @@ int sclp_pci_deconfigure(u32 fid) return do_pci_configure(SCLP_CMDW_DECONFIGURE_PCI, fid); } EXPORT_SYMBOL(sclp_pci_deconfigure); + +static void sclp_pci_callback(struct sclp_req *req, void *data) +{ + struct completion *completion = data; + + complete(completion); +} + +static int sclp_pci_check_report(struct zpci_report_error_header *report) +{ + if (report->version != 1) + return -EINVAL; + + if (report->action != SCLP_ERRNOTIFY_AQ_REPAIR && + report->action != SCLP_ERRNOTIFY_AQ_INFO_LOG) + return -EINVAL; + + if (report->length > (PAGE_SIZE - sizeof(struct err_notify_sccb))) + return -EINVAL; + + return 0; +} + +int sclp_pci_report(struct zpci_report_error_header *report, u32 fh, u32 fid) +{ + DECLARE_COMPLETION_ONSTACK(completion); + struct err_notify_sccb *sccb; + struct sclp_req req = {0}; + int ret; + + ret = sclp_pci_check_report(report); + if (ret) + return ret; + + mutex_lock(&sclp_pci_mutex); + ret = sclp_register(&sclp_pci_event); + if (ret) + goto out_unlock; + + if (!(sclp_pci_event.sclp_receive_mask & EVTYP_ERRNOTIFY_MASK)) { + ret = -EOPNOTSUPP; + goto out_unregister; + } + + sccb = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); + if (!sccb) { + ret = -ENOMEM; + goto out_unregister; + } + + req.callback_data = &completion; + req.callback = sclp_pci_callback; + req.command = SCLP_CMDW_WRITE_EVENT_DATA; + req.status = SCLP_REQ_FILLED; + req.sccb = sccb; + + sccb->evbuf.header.length = sizeof(sccb->evbuf) + report->length; + sccb->evbuf.header.type = EVTYP_ERRNOTIFY; + sccb->header.length = sizeof(sccb->header) + sccb->evbuf.header.length; + + sccb->evbuf.action = report->action; + sccb->evbuf.atype = SCLP_ATYPE_PCI; + sccb->evbuf.fh = fh; + sccb->evbuf.fid = fid; + + memcpy(sccb->evbuf.data, report->data, report->length); + + ret = sclp_add_request(&req); + if (ret) + goto out_free_req; + + wait_for_completion(&completion); + if (req.status != SCLP_REQ_DONE) { + pr_warn("request failed (status=0x%02x)\n", + req.status); + ret = -EIO; + goto out_free_req; + } + + if (sccb->header.response_code != 0x0020) { + pr_warn("request failed with response code 0x%x\n", + sccb->header.response_code); + ret = -EIO; + } + +out_free_req: + free_page((unsigned long) sccb); +out_unregister: + sclp_unregister(&sclp_pci_event); +out_unlock: + mutex_unlock(&sclp_pci_mutex); + return ret; +}