-/*-
- * BSD LICENSE
- *
- * Copyright 2016 NXP.
- *
- * 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 NXP 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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2016 NXP
*/
#include <stdio.h>
enum rte_iova_mode
rte_bus_get_iommu_class(void)
{
- int mode = RTE_IOVA_DC;
+ enum rte_iova_mode mode = RTE_IOVA_DC;
+ bool buses_want_va = false;
+ bool buses_want_pa = false;
struct rte_bus *bus;
TAILQ_FOREACH(bus, &rte_bus_list, next) {
+ enum rte_iova_mode bus_iova_mode;
- if (bus->get_iommu_class)
- mode |= bus->get_iommu_class();
- }
+ if (bus->get_iommu_class == NULL)
+ continue;
- if (mode != RTE_IOVA_VA) {
- /* Use default IOVA mode */
+ bus_iova_mode = bus->get_iommu_class();
+ RTE_LOG(DEBUG, EAL, "Bus %s wants IOVA as '%s'\n",
+ bus->name,
+ bus_iova_mode == RTE_IOVA_DC ? "DC" :
+ (bus_iova_mode == RTE_IOVA_PA ? "PA" : "VA"));
+ if (bus_iova_mode == RTE_IOVA_PA)
+ buses_want_pa = true;
+ else if (bus_iova_mode == RTE_IOVA_VA)
+ buses_want_va = true;
+ }
+ if (buses_want_va && !buses_want_pa) {
+ mode = RTE_IOVA_VA;
+ } else if (buses_want_pa && !buses_want_va) {
mode = RTE_IOVA_PA;
+ } else {
+ mode = RTE_IOVA_DC;
+ if (buses_want_va) {
+ RTE_LOG(WARNING, EAL, "Some buses want 'VA' but forcing 'DC' because other buses want 'PA'.\n");
+ RTE_LOG(WARNING, EAL, "Depending on the final decision by the EAL, not all buses may be able to initialize.\n");
+ }
}
+
return mode;
}