From ea96ceac80cc82cb1c54a37bb8aaf4e695e87d0a Mon Sep 17 00:00:00 2001 From: Thomas Klein Date: Tue, 20 Apr 2010 23:10:55 +0000 Subject: [PATCH] ehea: error handling improvement Reset a port's resources only if they're actually in an error state Signed-off-by: Thomas Klein Signed-off-by: David S. Miller --- drivers/net/ehea/ehea_main.c | 31 +++++++++++++++++++++----- drivers/net/ehea/ehea_qmr.c | 43 +++++++++++++++++++----------------- drivers/net/ehea/ehea_qmr.h | 14 +++++++++++- 3 files changed, 62 insertions(+), 26 deletions(-) diff --git a/drivers/net/ehea/ehea_main.c b/drivers/net/ehea/ehea_main.c index 3f445efa9482..c35d1e3631d1 100644 --- a/drivers/net/ehea/ehea_main.c +++ b/drivers/net/ehea/ehea_main.c @@ -791,11 +791,17 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) cqe_counter++; rmb(); if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { - ehea_error("Send Completion Error: Resetting port"); + ehea_error("Bad send completion status=0x%04X", + cqe->status); + if (netif_msg_tx_err(pr->port)) ehea_dump(cqe, sizeof(*cqe), "Send CQE"); - ehea_schedule_port_reset(pr->port); - break; + + if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { + ehea_error("Resetting port"); + ehea_schedule_port_reset(pr->port); + break; + } } if (netif_msg_tx_done(pr->port)) @@ -901,6 +907,8 @@ static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) struct ehea_eqe *eqe; struct ehea_qp *qp; u32 qp_token; + u64 resource_type, aer, aerr; + int reset_port = 0; eqe = ehea_poll_eq(port->qp_eq); @@ -910,11 +918,24 @@ static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) eqe->entry, qp_token); qp = port->port_res[qp_token].qp; - ehea_error_data(port->adapter, qp->fw_handle); + + resource_type = ehea_error_data(port->adapter, qp->fw_handle, + &aer, &aerr); + + if (resource_type == EHEA_AER_RESTYPE_QP) { + if ((aer & EHEA_AER_RESET_MASK) || + (aerr & EHEA_AERR_RESET_MASK)) + reset_port = 1; + } else + reset_port = 1; /* Reset in case of CQ or EQ error */ + eqe = ehea_poll_eq(port->qp_eq); } - ehea_schedule_port_reset(port); + if (reset_port) { + ehea_error("Resetting port"); + ehea_schedule_port_reset(port); + } return IRQ_HANDLED; } diff --git a/drivers/net/ehea/ehea_qmr.c b/drivers/net/ehea/ehea_qmr.c index a1b4c7e56367..89128b6373e3 100644 --- a/drivers/net/ehea/ehea_qmr.c +++ b/drivers/net/ehea/ehea_qmr.c @@ -229,14 +229,14 @@ u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force) int ehea_destroy_cq(struct ehea_cq *cq) { - u64 hret; + u64 hret, aer, aerr; if (!cq) return 0; hcp_epas_dtor(&cq->epas); hret = ehea_destroy_cq_res(cq, NORMAL_FREE); if (hret == H_R_STATE) { - ehea_error_data(cq->adapter, cq->fw_handle); + ehea_error_data(cq->adapter, cq->fw_handle, &aer, &aerr); hret = ehea_destroy_cq_res(cq, FORCE_FREE); } @@ -357,7 +357,7 @@ u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force) int ehea_destroy_eq(struct ehea_eq *eq) { - u64 hret; + u64 hret, aer, aerr; if (!eq) return 0; @@ -365,7 +365,7 @@ int ehea_destroy_eq(struct ehea_eq *eq) hret = ehea_destroy_eq_res(eq, NORMAL_FREE); if (hret == H_R_STATE) { - ehea_error_data(eq->adapter, eq->fw_handle); + ehea_error_data(eq->adapter, eq->fw_handle, &aer, &aerr); hret = ehea_destroy_eq_res(eq, FORCE_FREE); } @@ -540,7 +540,7 @@ u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force) int ehea_destroy_qp(struct ehea_qp *qp) { - u64 hret; + u64 hret, aer, aerr; if (!qp) return 0; @@ -548,7 +548,7 @@ int ehea_destroy_qp(struct ehea_qp *qp) hret = ehea_destroy_qp_res(qp, NORMAL_FREE); if (hret == H_R_STATE) { - ehea_error_data(qp->adapter, qp->fw_handle); + ehea_error_data(qp->adapter, qp->fw_handle, &aer, &aerr); hret = ehea_destroy_qp_res(qp, FORCE_FREE); } @@ -986,42 +986,45 @@ void print_error_data(u64 *data) if (length > EHEA_PAGESIZE) length = EHEA_PAGESIZE; - if (type == 0x8) /* Queue Pair */ + if (type == EHEA_AER_RESTYPE_QP) ehea_error("QP (resource=%llX) state: AER=0x%llX, AERR=0x%llX, " "port=%llX", resource, data[6], data[12], data[22]); - - if (type == 0x4) /* Completion Queue */ + else if (type == EHEA_AER_RESTYPE_CQ) ehea_error("CQ (resource=%llX) state: AER=0x%llX", resource, data[6]); - - if (type == 0x3) /* Event Queue */ + else if (type == EHEA_AER_RESTYPE_EQ) ehea_error("EQ (resource=%llX) state: AER=0x%llX", resource, data[6]); ehea_dump(data, length, "error data"); } -void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle) +u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle, + u64 *aer, u64 *aerr) { unsigned long ret; u64 *rblock; + u64 type = 0; rblock = (void *)get_zeroed_page(GFP_KERNEL); if (!rblock) { ehea_error("Cannot allocate rblock memory."); - return; + goto out; } - ret = ehea_h_error_data(adapter->handle, - res_handle, - rblock); + ret = ehea_h_error_data(adapter->handle, res_handle, rblock); - if (ret == H_R_STATE) - ehea_error("No error data is available: %llX.", res_handle); - else if (ret == H_SUCCESS) + if (ret == H_SUCCESS) { + type = EHEA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]); + *aer = rblock[6]; + *aerr = rblock[12]; print_error_data(rblock); - else + } else if (ret == H_R_STATE) { + ehea_error("No error data available: %llX.", res_handle); + } else ehea_error("Error data could not be fetched: %llX", res_handle); free_page((unsigned long)rblock); +out: + return type; } diff --git a/drivers/net/ehea/ehea_qmr.h b/drivers/net/ehea/ehea_qmr.h index 0817c1e74a19..882c50c9c34f 100644 --- a/drivers/net/ehea/ehea_qmr.h +++ b/drivers/net/ehea/ehea_qmr.h @@ -154,6 +154,9 @@ struct ehea_rwqe { #define EHEA_CQE_STAT_ERR_IP 0x2000 #define EHEA_CQE_STAT_ERR_CRC 0x1000 +/* Defines which bad send cqe stati lead to a port reset */ +#define EHEA_CQE_STAT_RESET_MASK 0x0002 + struct ehea_cqe { u64 wr_id; /* work request ID from WQE */ u8 type; @@ -187,6 +190,14 @@ struct ehea_cqe { #define EHEA_EQE_SM_MECH_NUMBER EHEA_BMASK_IBM(48, 55) #define EHEA_EQE_SM_PORT_NUMBER EHEA_BMASK_IBM(56, 63) +#define EHEA_AER_RESTYPE_QP 0x8 +#define EHEA_AER_RESTYPE_CQ 0x4 +#define EHEA_AER_RESTYPE_EQ 0x3 + +/* Defines which affiliated errors lead to a port reset */ +#define EHEA_AER_RESET_MASK 0xFFFFFFFFFEFFFFFFULL +#define EHEA_AERR_RESET_MASK 0xFFFFFFFFFFFFFFFFULL + struct ehea_eqe { u64 entry; }; @@ -379,7 +390,8 @@ int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr, int ehea_rem_mr(struct ehea_mr *mr); -void ehea_error_data(struct ehea_adapter *adapter, u64 res_handle); +u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle, + u64 *aer, u64 *aerr); int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages); int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages); -- 2.30.2