Imported Upstream version 16.11

[deb_dpdk.git] / drivers / net / bnxt / bnxt_irq.c

diff --git a/drivers/net/bnxt/bnxt_irq.c b/drivers/net/bnxt/bnxt_irq.c
new file mode 100644 (file)
index 0000000..e93585a
--- /dev/null
+++ b/drivers/net/bnxt/bnxt_irq.c
@@ -0,0 +1,156 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2014-2015 Broadcom Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Broadcom Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <inttypes.h>
+
+#include <rte_malloc.h>
+
+#include "bnxt.h"
+#include "bnxt_cpr.h"
+#include "bnxt_irq.h"
+#include "bnxt_ring.h"
+#include "hsi_struct_def_dpdk.h"
+
+/*
+ * Interrupts
+ */
+
+static void bnxt_int_handler(struct rte_intr_handle *handle __rte_unused,
+                            void *param)
+{
+       struct rte_eth_dev *eth_dev = (struct rte_eth_dev *)param;
+       struct bnxt *bp = (struct bnxt *)eth_dev->data->dev_private;
+       struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
+       uint32_t raw_cons = cpr->cp_raw_cons;
+       uint32_t cons;
+       struct cmpl_base *cmp;
+
+       while (1) {
+               cons = RING_CMP(cpr->cp_ring_struct, raw_cons);
+               cmp = &cpr->cp_desc_ring[cons];
+
+               if (!CMP_VALID(cmp, raw_cons, cpr->cp_ring_struct))
+                       break;
+
+               switch (CMP_TYPE(cmp)) {
+               case CMPL_BASE_TYPE_HWRM_ASYNC_EVENT:
+                       /* Handle any async event */
+                       bnxt_handle_async_event(bp, cmp);
+                       break;
+               case CMPL_BASE_TYPE_HWRM_FWD_RESP:
+                       /* Handle HWRM forwarded responses */
+                       bnxt_handle_fwd_req(bp, cmp);
+                       break;
+               default:
+                       /* Ignore any other events */
+                       break;
+               }
+               raw_cons = NEXT_RAW_CMP(raw_cons);
+       }
+       B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
+}
+
+void bnxt_free_int(struct bnxt *bp)
+{
+       struct bnxt_irq *irq;
+
+       irq = bp->irq_tbl;
+       if (irq) {
+               if (irq->requested) {
+                       rte_intr_disable(&bp->pdev->intr_handle);
+                       rte_intr_callback_unregister(&bp->pdev->intr_handle,
+                                                    irq->handler,
+                                                    (void *)bp->eth_dev);
+                       irq->requested = 0;
+               }
+               rte_free((void *)bp->irq_tbl);
+               bp->irq_tbl = NULL;
+       }
+}
+
+void bnxt_disable_int(struct bnxt *bp)
+{
+       struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
+
+       /* Only the default completion ring */
+       B_CP_DIS_DB(cpr, cpr->cp_raw_cons);
+}
+
+void bnxt_enable_int(struct bnxt *bp)
+{
+       struct bnxt_cp_ring_info *cpr = bp->def_cp_ring;
+
+       B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
+}
+
+int bnxt_setup_int(struct bnxt *bp)
+{
+       uint16_t total_vecs;
+       const int len = sizeof(bp->irq_tbl[0].name);
+       int i, rc = 0;
+
+       /* DPDK host only supports 1 MSI-X vector */
+       total_vecs = 1;
+       bp->irq_tbl = rte_calloc("bnxt_irq_tbl", total_vecs,
+                                sizeof(struct bnxt_irq), 0);
+       if (bp->irq_tbl) {
+               for (i = 0; i < total_vecs; i++) {
+                       bp->irq_tbl[i].vector = i;
+                       snprintf(bp->irq_tbl[i].name, len,
+                                "%s-%d", bp->eth_dev->data->name, i);
+                       bp->irq_tbl[i].handler = bnxt_int_handler;
+               }
+       } else {
+               rc = -ENOMEM;
+               goto setup_exit;
+       }
+       return 0;
+
+setup_exit:
+       RTE_LOG(ERR, PMD, "bnxt_irq_tbl setup failed");
+       return rc;
+}
+
+int bnxt_request_int(struct bnxt *bp)
+{
+       int rc = 0;
+
+       struct bnxt_irq *irq = bp->irq_tbl;
+
+       rte_intr_callback_register(&bp->pdev->intr_handle, irq->handler,
+                                  (void *)bp->eth_dev);
+       rte_intr_enable(&bp->pdev->intr_handle);
+
+       irq->requested = 1;
+       return rc;
+}