Changeset 69927fa in mainline for uspace/drv/nic/virtio-net/virtio-net.c

Timestamp:

2018-05-22T19:06:49Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

00192cde

Parents:

e07257e

git-author:

Jakub Jermar <jakub@…> (2018-04-09 16:40:20)

git-committer:

Jakub Jermar <jakub@…> (2018-05-22 19:06:49)

Message:

Start parsing the Virtio PCI Capabilities

File:

• uspace/drv/nic/virtio-net/virtio-net.c (modified) (2 diffs)

uspace/drv/nic/virtio-net/virtio-net.c

@@ -28 +28 @@
 
 #include <stdio.h>
+#include <stdint.h>
 
 #include <ddf/driver.h>
 #include <ddf/log.h>
 #include <ops/nic.h>
+#include <pci_dev_iface.h>
 
 #include <nic.h>
@@ -37 +39 @@
 #define NAME    "virtio-net"
 
+#define VIRTIO_PCI_CAP_TYPE(c)          ((c) + 3)
+#define VIRTIO_PCI_CAP_BAR(c)           ((c) + 4)
+#define VIRTIO_PCI_CAP_OFFSET(c)        ((c) + 8)
+#define VIRTIO_PCI_CAP_LENGTH(c)        ((c) + 12)
+
+#define VIRTIO_PCI_CAP_COMMON_CFG       1
+#define VIRTIO_PCI_CAP_NOTIFY_CFG       2
+#define VIRTIO_PCI_CAP_ISR_CFG          3
+#define VIRTIO_PCI_CAP_DEVICE_CFG       4
+#define VIRTIO_PCI_CAP_PCI_CFG          5
+
 static errno_t virtio_net_dev_add(ddf_dev_t *dev)
 {
         ddf_msg(LVL_NOTE, "%s %s (handle = %zu)", __func__,
             ddf_dev_get_name(dev), ddf_dev_get_handle(dev));
+
+        async_sess_t *pci_sess = ddf_dev_parent_sess_get(dev);
+        if (!pci_sess)
+                return ENOENT;
+
+        /*
+         * Find the VIRTIO PCI Capabilities
+         */
+        errno_t rc;
+        uint8_t c;
+        uint8_t id;
+        for (rc = pci_config_space_cap_first(pci_sess, &c, &id);
+            (rc == EOK) && c;
+            rc = pci_config_space_cap_next(pci_sess, &c, &id)) {
+                if (id == PCI_CAP_VENDORSPECID) {
+                        uint8_t type;
+
+                        rc = pci_config_space_read_8(pci_sess,
+                            VIRTIO_PCI_CAP_TYPE(c), &type);
+                        if (rc != EOK)
+                                return rc;
+
+                        switch (type) {
+                        case VIRTIO_PCI_CAP_COMMON_CFG:
+                                break;
+                        case VIRTIO_PCI_CAP_NOTIFY_CFG:
+                                break;
+                        case VIRTIO_PCI_CAP_ISR_CFG:
+                                break;
+                        case VIRTIO_PCI_CAP_DEVICE_CFG:
+                                break;
+                        case VIRTIO_PCI_CAP_PCI_CFG:
+                                break;
+                        default:
+                                break;
+                        }
+                }
+        }
+        if (rc != EOK)
+                return rc;
 
         return ENOTSUP;