diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c | 71 |
1 files changed, 50 insertions, 21 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c index 9e3c6b36cde8..0307e9c69a47 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.c @@ -663,22 +663,64 @@ static int uld_attach(struct adapter *adap, unsigned int uld) return 0; } +static bool cxgb4_uld_in_use(struct adapter *adap) +{ + const struct tid_info *t = &adap->tids; + + return (atomic_read(&t->conns_in_use) || t->stids_in_use); +} + #ifdef CONFIG_CHELSIO_TLS_DEVICE /* cxgb4_set_ktls_feature: request FW to enable/disable ktls settings. * @adap: adapter info * @enable: 1 to enable / 0 to disable ktls settings. */ -static void cxgb4_set_ktls_feature(struct adapter *adap, bool enable) +int cxgb4_set_ktls_feature(struct adapter *adap, bool enable) { - u32 params = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | - FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_KTLS_TX_HW) | - FW_PARAMS_PARAM_Y_V(enable)); int ret = 0; + u32 params = + FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | + FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_KTLS_HW) | + FW_PARAMS_PARAM_Y_V(enable) | + FW_PARAMS_PARAM_Z_V(FW_PARAMS_PARAM_DEV_KTLS_HW_USER_ENABLE); + + if (enable) { + if (!refcount_read(&adap->chcr_ktls.ktls_refcount)) { + /* At this moment if ULD connection are up means, other + * ULD is/are already active, return failure. + */ + if (cxgb4_uld_in_use(adap)) { + dev_warn(adap->pdev_dev, + "ULD connections (tid/stid) active. Can't enable kTLS\n"); + return -EINVAL; + } + ret = t4_set_params(adap, adap->mbox, adap->pf, + 0, 1, ¶ms, ¶ms); + if (ret) + return ret; + refcount_set(&adap->chcr_ktls.ktls_refcount, 1); + pr_info("kTLS has been enabled. Restrictions placed on ULD support\n"); + } else { + /* ktls settings already up, just increment refcount. */ + refcount_inc(&adap->chcr_ktls.ktls_refcount); + } + } else { + /* return failure if refcount is already 0. */ + if (!refcount_read(&adap->chcr_ktls.ktls_refcount)) + return -EINVAL; + /* decrement refcount and test, if 0, disable ktls feature, + * else return command success. + */ + if (refcount_dec_and_test(&adap->chcr_ktls.ktls_refcount)) { + ret = t4_set_params(adap, adap->mbox, adap->pf, + 0, 1, ¶ms, ¶ms); + if (ret) + return ret; + pr_info("kTLS is disabled. Restrictions on ULD support removed\n"); + } + } - ret = t4_set_params(adap, adap->mbox, adap->pf, 0, 1, ¶ms, ¶ms); - /* if fw returns failure, clear the ktls flag */ - if (ret) - adap->params.crypto &= ~ULP_CRYPTO_KTLS_INLINE; + return ret; } #endif @@ -706,12 +748,6 @@ static void cxgb4_uld_alloc_resources(struct adapter *adap, } if (adap->flags & CXGB4_FULL_INIT_DONE) enable_rx_uld(adap, type); -#ifdef CONFIG_CHELSIO_TLS_DEVICE - /* send mbox to enable ktls related settings. */ - if (type == CXGB4_ULD_CRYPTO && - (adap->params.crypto & FW_CAPS_CONFIG_TX_TLS_HW)) - cxgb4_set_ktls_feature(adap, 1); -#endif if (adap->uld[type].add) goto free_irq; ret = setup_sge_txq_uld(adap, type, p); @@ -805,13 +841,6 @@ int cxgb4_unregister_uld(enum cxgb4_uld type) continue; cxgb4_shutdown_uld_adapter(adap, type); - -#ifdef CONFIG_CHELSIO_TLS_DEVICE - /* send mbox to disable ktls related settings. */ - if (type == CXGB4_ULD_CRYPTO && - (adap->params.crypto & FW_CAPS_CONFIG_TX_TLS_HW)) - cxgb4_set_ktls_feature(adap, 0); -#endif } list_for_each_entry_safe(uld_entry, tmp, &uld_list, list_node) { |