virtio: drop name parameter for virtio_init()

This patch drops the name parameter for the virtio_init function.

The pair between the numeric device ID and the string device ID
(name) of a virtio device already exists, but not in a way that
lets us map between them.

This patch lets us do this and removes the need for the name
parameter in the virtio_init function.

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1648819405-25696-2-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

13 files changed, 65 insertions, 27 deletions

diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c
index c595957983..b875640147 100644
--- a/hw/virtio/vhost-user-fs.c
+++ b/hw/virtio/vhost-user-fs.c
@@ -219,8 +219,7 @@ static void vuf_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "vhost-user-fs", VIRTIO_ID_FS,
-                sizeof(struct virtio_fs_config));
+    virtio_init(vdev, VIRTIO_ID_FS, sizeof(struct virtio_fs_config));
 
     /* Hiprio queue */
     fs->hiprio_vq = virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c
index 42c7f6d9e5..6020eee093 100644
--- a/hw/virtio/vhost-user-i2c.c
+++ b/hw/virtio/vhost-user-i2c.c
@@ -14,11 +14,6 @@
 #include "qemu/error-report.h"
 #include "standard-headers/linux/virtio_ids.h"
 
-/* Remove this once the header is updated in Linux kernel */
-#ifndef VIRTIO_ID_I2C_ADAPTER
-#define VIRTIO_ID_I2C_ADAPTER                34
-#endif
-
 static const int feature_bits[] = {
     VIRTIO_I2C_F_ZERO_LENGTH_REQUEST,
     VHOST_INVALID_FEATURE_BIT
@@ -227,7 +222,7 @@ static void vu_i2c_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "vhost-user-i2c", VIRTIO_ID_I2C_ADAPTER, 0);
+    virtio_init(vdev, VIRTIO_ID_I2C_ADAPTER, 0);
 
     i2c->vhost_dev.nvqs = 1;
     i2c->vq = virtio_add_queue(vdev, 4, vu_i2c_handle_output);
diff --git a/hw/virtio/vhost-user-rng.c b/hw/virtio/vhost-user-rng.c
index 209ee5bf9a..08bccba9dc 100644
--- a/hw/virtio/vhost-user-rng.c
+++ b/hw/virtio/vhost-user-rng.c
@@ -203,7 +203,7 @@ static void vu_rng_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "vhost-user-rng", VIRTIO_ID_RNG, 0);
+    virtio_init(vdev, VIRTIO_ID_RNG, 0);
 
     rng->req_vq = virtio_add_queue(vdev, 4, vu_rng_handle_output);
     if (!rng->req_vq) {
diff --git a/hw/virtio/vhost-user-vsock.c b/hw/virtio/vhost-user-vsock.c
index 52bd682c34..0f8ff99f85 100644
--- a/hw/virtio/vhost-user-vsock.c
+++ b/hw/virtio/vhost-user-vsock.c
@@ -107,7 +107,7 @@ static void vuv_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    vhost_vsock_common_realize(vdev, "vhost-user-vsock");
+    vhost_vsock_common_realize(vdev);
 
     vhost_dev_set_config_notifier(&vvc->vhost_dev, &vsock_ops);
 
diff --git a/hw/virtio/vhost-vsock-common.c b/hw/virtio/vhost-vsock-common.c
index ed706681ac..ad5c8ff5d5 100644
--- a/hw/virtio/vhost-vsock-common.c
+++ b/hw/virtio/vhost-vsock-common.c
@@ -224,12 +224,11 @@ int vhost_vsock_common_post_load(void *opaque, int version_id)
     return 0;
 }
 
-void vhost_vsock_common_realize(VirtIODevice *vdev, const char *name)
+void vhost_vsock_common_realize(VirtIODevice *vdev)
 {
     VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
 
-    virtio_init(vdev, name, VIRTIO_ID_VSOCK,
-                sizeof(struct virtio_vsock_config));
+    virtio_init(vdev, VIRTIO_ID_VSOCK, sizeof(struct virtio_vsock_config));
 
     /* Receive and transmit queues belong to vhost */
     vvc->recv_vq = virtio_add_queue(vdev, VHOST_VSOCK_QUEUE_SIZE,
diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c
index 714046210b..0338de892f 100644
--- a/hw/virtio/vhost-vsock.c
+++ b/hw/virtio/vhost-vsock.c
@@ -169,7 +169,7 @@ static void vhost_vsock_device_realize(DeviceState *dev, Error **errp)
         }
     }
 
-    vhost_vsock_common_realize(vdev, "vhost-vsock");
+    vhost_vsock_common_realize(vdev);
 
     ret = vhost_dev_init(&vvc->vhost_dev, (void *)(uintptr_t)vhostfd,
                          VHOST_BACKEND_TYPE_KERNEL, 0, errp);
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 8f1b38ef5c..73ac5eb675 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -882,8 +882,7 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp)
     VirtIOBalloon *s = VIRTIO_BALLOON(dev);
     int ret;
 
-    virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON,
-                virtio_balloon_config_size(s));
+    virtio_init(vdev, VIRTIO_ID_BALLOON, virtio_balloon_config_size(s));
 
     ret = qemu_add_balloon_handler(virtio_balloon_to_target,
                                    virtio_balloon_stat, s);
diff --git a/hw/virtio/virtio-crypto.c b/hw/virtio/virtio-crypto.c
index 0e31e3cc04..df9adb2c07 100644
--- a/hw/virtio/virtio-crypto.c
+++ b/hw/virtio/virtio-crypto.c
@@ -810,7 +810,7 @@ static void virtio_crypto_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "virtio-crypto", VIRTIO_ID_CRYPTO, vcrypto->config_size);
+    virtio_init(vdev, VIRTIO_ID_CRYPTO, vcrypto->config_size);
     vcrypto->curr_queues = 1;
     vcrypto->vqs = g_new0(VirtIOCryptoQueue, vcrypto->max_queues);
     for (i = 0; i < vcrypto->max_queues; i++) {
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 57c09d98a9..2597e166f9 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -1033,8 +1033,7 @@ static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIOIOMMU *s = VIRTIO_IOMMU(dev);
 
-    virtio_init(vdev, "virtio-iommu", VIRTIO_ID_IOMMU,
-                sizeof(struct virtio_iommu_config));
+    virtio_init(vdev, VIRTIO_ID_IOMMU, sizeof(struct virtio_iommu_config));
 
     memset(s->iommu_pcibus_by_bus_num, 0, sizeof(s->iommu_pcibus_by_bus_num));
 
diff --git a/hw/virtio/virtio-mem.c b/hw/virtio/virtio-mem.c
index 5aca408726..30d03e987a 100644
--- a/hw/virtio/virtio-mem.c
+++ b/hw/virtio/virtio-mem.c
@@ -867,8 +867,7 @@ static void virtio_mem_device_realize(DeviceState *dev, Error **errp)
                         vmem->block_size;
     vmem->bitmap = bitmap_new(vmem->bitmap_size);
 
-    virtio_init(vdev, TYPE_VIRTIO_MEM, VIRTIO_ID_MEM,
-                sizeof(struct virtio_mem_config));
+    virtio_init(vdev, VIRTIO_ID_MEM, sizeof(struct virtio_mem_config));
     vmem->vq = virtio_add_queue(vdev, 128, virtio_mem_handle_request);
 
     host_memory_backend_set_mapped(vmem->memdev, true);
diff --git a/hw/virtio/virtio-pmem.c b/hw/virtio/virtio-pmem.c
index 5dd21c2c44..a1abfe0e1b 100644
--- a/hw/virtio/virtio-pmem.c
+++ b/hw/virtio/virtio-pmem.c
@@ -122,8 +122,7 @@ static void virtio_pmem_realize(DeviceState *dev, Error **errp)
     }
 
     host_memory_backend_set_mapped(pmem->memdev, true);
-    virtio_init(vdev, TYPE_VIRTIO_PMEM, VIRTIO_ID_PMEM,
-                sizeof(struct virtio_pmem_config));
+    virtio_init(vdev, VIRTIO_ID_PMEM, sizeof(struct virtio_pmem_config));
     pmem->rq_vq = virtio_add_queue(vdev, 128, virtio_pmem_flush);
 }
 
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index cc8e9f775d..7e12fc03bf 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -215,7 +215,7 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    virtio_init(vdev, "virtio-rng", VIRTIO_ID_RNG, 0);
+    virtio_init(vdev, VIRTIO_ID_RNG, 0);
 
     vrng->vq = virtio_add_queue(vdev, 8, handle_input);
     vrng->quota_remaining = vrng->conf.max_bytes;
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 67a873f54a..7f9fcfd06d 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -132,6 +132,56 @@ struct VirtQueue
     QLIST_ENTRY(VirtQueue) node;
 };
 
+const char *virtio_device_names[] = {
+    [VIRTIO_ID_NET] = "virtio-net",
+    [VIRTIO_ID_BLOCK] = "virtio-blk",
+    [VIRTIO_ID_CONSOLE] = "virtio-serial",
+    [VIRTIO_ID_RNG] = "virtio-rng",
+    [VIRTIO_ID_BALLOON] = "virtio-balloon",
+    [VIRTIO_ID_IOMEM] = "virtio-iomem",
+    [VIRTIO_ID_RPMSG] = "virtio-rpmsg",
+    [VIRTIO_ID_SCSI] = "virtio-scsi",
+    [VIRTIO_ID_9P] = "virtio-9p",
+    [VIRTIO_ID_MAC80211_WLAN] = "virtio-mac-wlan",
+    [VIRTIO_ID_RPROC_SERIAL] = "virtio-rproc-serial",
+    [VIRTIO_ID_CAIF] = "virtio-caif",
+    [VIRTIO_ID_MEMORY_BALLOON] = "virtio-mem-balloon",
+    [VIRTIO_ID_GPU] = "virtio-gpu",
+    [VIRTIO_ID_CLOCK] = "virtio-clk",
+    [VIRTIO_ID_INPUT] = "virtio-input",
+    [VIRTIO_ID_VSOCK] = "vhost-vsock",
+    [VIRTIO_ID_CRYPTO] = "virtio-crypto",
+    [VIRTIO_ID_SIGNAL_DIST] = "virtio-signal",
+    [VIRTIO_ID_PSTORE] = "virtio-pstore",
+    [VIRTIO_ID_IOMMU] = "virtio-iommu",
+    [VIRTIO_ID_MEM] = "virtio-mem",
+    [VIRTIO_ID_SOUND] = "virtio-sound",
+    [VIRTIO_ID_FS] = "virtio-user-fs",
+    [VIRTIO_ID_PMEM] = "virtio-pmem",
+    [VIRTIO_ID_RPMB] = "virtio-rpmb",
+    [VIRTIO_ID_MAC80211_HWSIM] = "virtio-mac-hwsim",
+    [VIRTIO_ID_VIDEO_ENCODER] = "virtio-vid-encoder",
+    [VIRTIO_ID_VIDEO_DECODER] = "virtio-vid-decoder",
+    [VIRTIO_ID_SCMI] = "virtio-scmi",
+    [VIRTIO_ID_NITRO_SEC_MOD] = "virtio-nitro-sec-mod",
+    [VIRTIO_ID_I2C_ADAPTER] = "vhost-user-i2c",
+    [VIRTIO_ID_WATCHDOG] = "virtio-watchdog",
+    [VIRTIO_ID_CAN] = "virtio-can",
+    [VIRTIO_ID_DMABUF] = "virtio-dmabuf",
+    [VIRTIO_ID_PARAM_SERV] = "virtio-param-serv",
+    [VIRTIO_ID_AUDIO_POLICY] = "virtio-audio-pol",
+    [VIRTIO_ID_BT] = "virtio-bluetooth",
+    [VIRTIO_ID_GPIO] = "virtio-gpio"
+};
+
+static const char *virtio_id_to_name(uint16_t device_id)
+{
+    assert(device_id < G_N_ELEMENTS(virtio_device_names));
+    const char *name = virtio_device_names[device_id];
+    assert(name != NULL);
+    return name;
+}
+
 /* Called within call_rcu().  */
 static void virtio_free_region_cache(VRingMemoryRegionCaches *caches)
 {
@@ -3207,8 +3257,7 @@ void virtio_instance_init_common(Object *proxy_obj, void *data,
     qdev_alias_all_properties(vdev, proxy_obj);
 }
 
-void virtio_init(VirtIODevice *vdev, const char *name,
-                 uint16_t device_id, size_t config_size)
+void virtio_init(VirtIODevice *vdev, uint16_t device_id, size_t config_size)
 {
     BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
@@ -3237,7 +3286,7 @@ void virtio_init(VirtIODevice *vdev, const char *name,
         vdev->vq[i].host_notifier_enabled = false;
     }
 
-    vdev->name = name;
+    vdev->name = virtio_id_to_name(device_id);
     vdev->config_len = config_size;
     if (vdev->config_len) {
         vdev->config = g_malloc0(config_size);