[dpdk-dev] [PATCH v4 07/14] virtio: vfio: add api support to rd/wr ioport bar

[Santosh Shukla]

For vfio case - Use pread/pwrite api to access virtio
ioport space.

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>
---
v3->v4:
- Corrected debug error message for oub_ class of apis
- renamed file from virtio_vfio.h to virtio_vfio_rw.h
- Removed #ifdef , #else clutter so that now no #else condition to handle for!
  this file will work for all the arch which is using vfio interface.

drivers/net/virtio/virtio_vfio_rw.h |  107 +++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 drivers/net/virtio/virtio_vfio_rw.h

diff --git a/drivers/net/virtio/virtio_vfio_rw.h b/drivers/net/virtio/virtio_vfio_rw.h
new file mode 100644
index 0000000..80a67f4
--- /dev/null
+++ b/drivers/net/virtio/virtio_vfio_rw.h
@@ -0,0 +1,107 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2016 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_VFIO_RW_H_
+#define _VIRTIO_VFIO_RW_H_
+
+#if defined(RTE_EAL_VFIO) && defined(RTE_LIBRTE_EAL_LINUXAPP)
+
+#include <stdint.h>
+#include <rte_pci.h>
+#include "virtio_logs.h"
+
+/* vfio rd/rw virtio apis */
+static inline void ioport_inb(const struct rte_pci_device *pci_dev,
+			      uint8_t reg, uint8_t *val)
+{
+	if (rte_eal_pci_read_bar(pci_dev, (uint8_t *)val, sizeof(uint8_t), reg,
+				 0) <= 0) {
+		PMD_DRV_LOG(ERR, "Can't read from PCI bar space");
+		return;
+	}
+}
+
+static inline void ioport_inw(const struct rte_pci_device *pci_dev,
+			      uint16_t reg, uint16_t *val)
+{
+	if (rte_eal_pci_read_bar(pci_dev, (uint16_t *)val, sizeof(uint16_t),
+				 reg, 0) <= 0) {
+		PMD_DRV_LOG(ERR, "Can't read from PCI bar space");
+		return;
+	}
+}
+
+static inline void ioport_inl(const struct rte_pci_device *pci_dev,
+			      uint32_t reg, uint32_t *val)
+{
+	if (rte_eal_pci_read_bar(pci_dev, (uint32_t *)val, sizeof(uint32_t),
+				 reg, 0) <= 0) {
+		PMD_DRV_LOG(ERR, "Can't read from PCI bar space");
+		return;
+	}
+}
+
+static inline void ioport_outb_p(const struct rte_pci_device *pci_dev,
+				 uint8_t reg, uint8_t val)
+{
+	if (rte_eal_pci_write_bar(pci_dev, (uint8_t *)&val, sizeof(uint8_t),
+				  reg, 0) <= 0) {
+		PMD_DRV_LOG(ERR, "Can't write to PCI bar space");
+		return;
+	}
+}
+
+
+static inline void ioport_outw_p(const struct rte_pci_device *pci_dev,
+				 uint16_t reg, uint16_t val)
+{
+	if (rte_eal_pci_write_bar(pci_dev, (uint16_t *)&val, sizeof(uint16_t),
+				  reg, 0) <= 0) {
+		PMD_DRV_LOG(ERR, "Can't write to PCI bar space");
+		return;
+	}
+}
+
+
+static inline void ioport_outl_p(const struct rte_pci_device *pci_dev,
+				 uint32_t reg, uint32_t val)
+{
+	if (rte_eal_pci_write_bar(pci_dev, (uint32_t *)&val, sizeof(uint32_t),
+				  reg, 0) <= 0) {
+		PMD_DRV_LOG(ERR, "Can't write to PCI bar space");
+		return;
+	}
+}
+
+#endif /* RTE_EAL_VFIO && RTE_XX_EAL_LINUXAPP */
+#endif /* _VIRTIO_VFIO_RW_H_ */
-- 
1.7.9.5