Introducing module to mmap iopci bar region. Applicable for linuxapp for non-x86
archs, Tested for arm64/ThunderX platform for linux. For that adding two global
api.
- virtio_ioport_init
- virtio_ioport_unmap
Signed-off-by: Santosh Shukla <sshukla at mvista.com>
Signed-off-by: Rizwan Ansari <ransari at mvista.com>
Signed-off-by: Rakesh Krishnamurthy <rakeshk at mvista.com>
---
drivers/net/virtio/Makefile | 1 +
drivers/net/virtio/virtio_ioport.c | 163 ++++++++++++++++++++++++++++++++++++
drivers/net/virtio/virtio_ioport.h | 42 ++++++++++
3 files changed, 206 insertions(+)
create mode 100644 drivers/net/virtio/virtio_ioport.c
create mode 100644 drivers/net/virtio/virtio_ioport.h
diff --git a/drivers/net/virtio/Makefile b/drivers/net/virtio/Makefile
index 25a842d..5cba6d3 100644
--- a/drivers/net/virtio/Makefile
+++ b/drivers/net/virtio/Makefile
@@ -50,6 +50,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtqueue.c
SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_pci.c
SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_rxtx.c
SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_ethdev.c
+SRCS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += virtio_ioport.c
SRCS-$(CONFIG_RTE_VIRTIO_INC_VECTOR) += virtio_rxtx_simple.c
# this lib depends upon:
diff --git a/drivers/net/virtio/virtio_ioport.c
b/drivers/net/virtio/virtio_ioport.c
new file mode 100644
index 0000000..ffeb8e9
--- /dev/null
+++ b/drivers/net/virtio/virtio_ioport.c
@@ -0,0 +1,163 @@
+/*
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Cavium Networks. All rights reserved.
+ * 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 Intel 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 "virtio_ioport.h"
+
+#if defined(RTE_EXEC_ENV_LINUXAPP) && (defined(RTE_ARCH_ARM) || \
+ defined(RTE_ARCH_ARM64))
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <exec-env/rte_virt_ioport.h>
+
+#include "virtio_logs.h"
+
+/* start address of first pci_iobar slot (user-space virtual-addres) */
+void *ioport_map;
+/**
+ * ioport map count,
+ * Use-case: virtio-net-pci.
+ * Keeps track of number of virtio-net-pci device mapped/unmapped. Max device
+ * support by linux kernel is 31, so ioport_map_cnt can not be greater than 31.
+ */
+static int ioport_map_cnt;
+
+static int
+virtio_map_ioport(void **resource_addr)
+{
+ int fd;
+ int ret = 0;
+
+ /* avoid -Werror=unused-parameter, keep compiler happy */
+ (void)resource_addr;
+ fd = open(VIRT_IOPORT_DEV, O_RDWR);
+ if (fd < 0) {
+ PMD_INIT_LOG(ERR, "device file %s open error: %d\n",
+ DEV_NAME, fd);
+ ret = -1;
+ goto out;
+ }
+
+ ioport_map = mmap(NULL, PCI_VIRT_IOPORT_SIZE,
+ PROT_EXEC | PROT_WRITE | PROT_READ, MAP_SHARED, fd, 0);
+
+ if (ioport_map == MAP_FAILED) {
+ PMD_INIT_LOG(ERR, "mmap: failed to map bar Address=%p\n",
+ *resource_addr);
+ ret = -ENOMEM;
+ goto out1;
+ }
+
+ PMD_INIT_LOG(INFO, "First pci_iobar mapped at %p\n", ioport_map);
+
+out1:
+ close(fd);
+out:
+ return ret;
+}
+
+static int
+virtio_set_ioport_addr(void **resource_addr, unsigned long offset)
+{
+ int ret = 0;
+
+ if (ioport_map_cnt >= PCI_VIRT_IOPORT_MAX) {
+ ret = -1;
+ PMD_INIT_LOG(ERR,
+ "ioport_map_cnt(%d) greater than"
+ "PCI_VIRT_IOPORT_MAX(%d)\n",
+ ioport_map_cnt, PCI_VIRT_IOPORT_MAX);
+ return ret;
+ }
+ *resource_addr = (void *)((char *)ioport_map + (ioport_map_cnt)*offset);
+ ioport_map_cnt++;
+
+ PMD_INIT_LOG(DEBUG, "pci.resource_addr %p ioport_map_cnt %d\n",
+ *resource_addr, ioport_map_cnt);
+ return ret;
+}
+
+int virtio_ioport_init(struct rte_pci_resource *mem_resource)
+{
+ int ret = 0;
+
+ /**
+ * Map the all IOBAR entry from /proc/ioport to 4k page_size only once.
+ * Later virtio_set_ioport_addr() func will update correct bar_addr for
+ * each ioport (i.e..pci_dev->mem_resource[0].addr)
+ */
+ if (!ioport_map) {
+ ret = virtio_map_ioport(&mem_resource->addr);
+ if (ret < 0)
+ return ret;
+ PMD_INIT_LOG(INFO, "ioport_map %p\n", ioport_map);
+ }
+
+ ret = virtio_set_ioport_addr(&mem_resource->addr, mem_resource->len);
+ if (ret < 0)
+ return ret;
+
+ PMD_INIT_LOG(INFO, "resource_addr %p resource_len :%ld\n",
+ mem_resource->addr, (unsigned long)mem_resource->len);
+ return ret;
+}
+
+void virtio_ioport_unmap(void)
+{
+ /* unmap ioport memory */
+ ioport_map_cnt--;
+ if (!ioport_map_cnt)
+ munmap(ioport_map, PCI_VIRT_IOPORT_SIZE);
+
+ PMD_INIT_LOG(DEBUG, "unmapping ioport_mem %d\n", ioport_map_cnt);
+}
+
+#else /* !LINUXAPP && !ARM/64 */
+
+int virtio_ioport_init(struct rte_pci_resource *mem_resource)
+{
+ (void)mem_resource;
+ return 0;
+}
+
+void virtio_ioport_unmap(void)
+{
+ return;
+}
+
+#endif /* LINUXAPP, ARM/64 */
diff --git a/drivers/net/virtio/virtio_ioport.h
b/drivers/net/virtio/virtio_ioport.h
new file mode 100644
index 0000000..bf79551
--- /dev/null
+++ b/drivers/net/virtio/virtio_ioport.h
@@ -0,0 +1,42 @@
+/*
+ * BSD LICENSE
+ *
+ * Copyright(c) 2015 Cavium Networks. All rights reserved.
+ * 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 Intel 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.
+ *
+ */
+#ifndef _VIRTIO_IOPORT_H_
+#define _VIRTIO_IOPORT_H_
+
+#include <rte_pci.h>
+
+int virtio_ioport_init(struct rte_pci_resource *mem_resource);
+void virtio_ioport_unmap(void);
+
+#endif /* _VIRTIO_IOPORT_H_ */
--
1.7.9.5
