| # View driver information |
| |
| The `ffx driver` command can retrieve various types of information about drivers |
| on a Fuchsia device. |
| |
| ## Concepts {:#concepts} |
| |
| The `ffx driver` command can retrieve information related to drivers that are |
| currently [available](#view-drivers) or [running](#view-running-drivers) on |
| your target [Fuchsia device][flash-a-device] (or [emulator][fuchsia-emulator]). |
| However, the `ffx driver` command expects that you can establish an |
| [SSH connection][ssh-connection] to the target Fuchsia device from your host |
| machine. To verify this connection to the device, you can run the |
| [`ffx target show`][ffx-target-show] command. |
| |
| Before using the `ffx driver` command, it is recommended that you familiarize |
| yourself with the fundamental concepts in [Driver framework (DFv2)][dfv2], |
| particularly the following: |
| |
| - [Device nodes][device-nodes] - A device node represents a hardware component, |
| a virtual device, or a part of a hardware device. |
| - [Node topology][node-topology] - A node topology describes the parent-child |
| relationships between device nodes in the system. |
| - [Driver host][driver-host] - A driver host, which runs as a Fuchsia component, |
| provides isolation between drivers in a Fuchsia system. In Fuchsia, every |
| driver lives in a driver host, and more than one driver can be co-located |
| within a single driver host. |
| |
| ## View drivers {:#view-drivers} |
| |
| To view all drivers available on your Fuchsia device, run the following command: |
| |
| ```posix-terminal |
| ffx driver list |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list |
| fuchsia-boot:///alc5663#meta/alc5663.cm |
| fuchsia-boot:///asix-88179#meta/asix-88179.cm |
| fuchsia-boot:///asix-88772b#meta/asix-88772b.cm |
| fuchsia-boot:///block-core#meta/block.core.cm |
| fuchsia-boot:///bt-transport-usb#meta/bt-transport-usb.cm |
| fuchsia-boot:///bus-pci#meta/bus-pci.cm |
| fuchsia-boot:///buttons#meta/buttons.cm |
| fuchsia-boot:///clock#meta/clock.cm |
| fuchsia-boot:///ctaphid#meta/ctaphid.cm |
| fuchsia-boot:///display-coordinator#meta/display-coordinator.cm |
| fuchsia-boot:///e1000#meta/e1000.cm |
| fuchsia-boot:///ftdi#meta/ftdi.cm |
| fuchsia-boot:///fvm#meta/fvm.cm |
| ... |
| ``` |
| |
| To view all drivers available on your Fuchsia device with more detailed |
| information, run the command with the -`v` flag: |
| |
| ```posix-terminal |
| ffx driver list -v |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list -v |
| URL : fuchsia-pkg://fuchsia.com/iwlwifi#meta/iwlwifi.cm |
| DF Version: 2 |
| Device Categories: [misc] |
| Bind rules bytecode: |
| fuchsia.BIND_FIDL_PROTOCOL == 4 |
| fuchsia.BIND_PCI_VID == 32902 |
| Jump if fuchsia.BIND_PCI_DID == 2394 to ?? |
| Jump if fuchsia.BIND_PCI_DID == 2395 to ?? |
| Jump if fuchsia.BIND_PCI_DID == 9469 to ?? |
| Jump if fuchsia.BIND_PCI_DID == 9510 to ?? |
| Jump if fuchsia.BIND_PCI_DID == 41200 to ?? |
| Abort |
| Label ?? |
| fuchsia.BIND_COMPOSITE == 1 |
| |
| URL : fuchsia-boot:///virtio_rng#meta/virtio_rng.cm |
| DF Version: 1 |
| Device Categories: [misc] |
| Bind rules bytecode: |
| Node (primary): pci |
| fuchsia.BIND_FIDL_PROTOCOL == 4 |
| fuchsia.BIND_PCI_VID == 6900 |
| Jump if fuchsia.BIND_PCI_DID == 4164 to ?? |
| Jump if fuchsia.BIND_PCI_DID == 4101 to ?? |
| ... |
| ``` |
| |
| ### View running drivers {:#view-running-drivers} |
| |
| To view all drivers that are currently running (loaded) on your Fuchsia |
| device, run the command with the -`loaded` flag: |
| |
| ```posix-terminal |
| ffx driver list --loaded |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list --loaded |
| fuchsia-boot:///#meta/block.core.cm |
| fuchsia-boot:///#meta/bus-pci.cm |
| fuchsia-boot:///#meta/display.cm |
| fuchsia-boot:///#meta/fvm.cm |
| fuchsia-boot:///#meta/goldfish-display.cm |
| fuchsia-boot:///#meta/goldfish.cm |
| fuchsia-boot:///#meta/goldfish_address_space.cm |
| fuchsia-boot:///#meta/goldfish_control.cm |
| fuchsia-boot:///#meta/goldfish_sensor.cm |
| fuchsia-boot:///#meta/goldfish_sync.cm |
| fuchsia-boot:///#meta/hid-input-report.cm |
| fuchsia-boot:///#meta/hid.cm |
| fuchsia-boot:///#meta/intel-hda.cm |
| ... |
| ``` |
| |
| ## View driver hosts {:#view-driver-hosts} |
| |
| To view all [driver hosts][driver-host] running on your Fuchsia device |
| as well as the drivers they host, run the following command: |
| |
| ```posix-terminal |
| ffx driver list-hosts |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list-hosts |
| Driver Host: 5416 |
| fuchsia-boot:///#meta/bus-pci.cm |
| fuchsia-boot:///#meta/display.cm |
| fuchsia-boot:///#meta/goldfish-display.cm |
| fuchsia-boot:///#meta/goldfish.cm |
| fuchsia-boot:///#meta/goldfish_control.cm |
| ... |
| |
| Driver Host: 8248 |
| fuchsia-boot:///#meta/intel-rtc.cm |
| |
| Driver Host: 8317 |
| fuchsia-boot:///#meta/pc-ps2.cm |
| |
| Driver Host: 9604 |
| fuchsia-boot:///#meta/block.core.cm |
| fuchsia-boot:///#meta/fvm.cm |
| fuchsia-boot:///#meta/virtio_block.cm |
| ... |
| ``` |
| |
| ## View the node topology {:#view-the-node-topology} |
| |
| To view the entire [node topology][node-topology] of your Fuchsia device, |
| run the following command: |
| |
| ```posix-terminal |
| ffx driver dump |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver dump |
| [dev] pid=5521 fuchsia-boot:///platform-bus#meta/platform-bus.cm |
| [sys] pid=None unbound |
| [platform] pid=None unbound |
| [ram-disk] pid=7584 fuchsia-boot:///ramdisk#meta/ramdisk.cm |
| [ramctl] pid=None unbound |
| [ram-nand] pid=None unbound |
| [virtual-audio] pid=25117 fuchsia-pkg://fuchsia.com/virtual_audio#meta/virtual_audio_driver.cm |
| [virtual_audio] pid=None unbound |
| [bt-hci-emulator] pid=None unbound |
| [fake-battery] pid=24707 fuchsia-pkg://fuchsia.com/fake-battery#meta/fake_battery.cm |
| [fake-battery] pid=None unbound |
| [power-simulator] pid=None unbound |
| [pt] pid=5521 fuchsia-boot:///platform-bus-x86#meta/pl |
| ... |
| ``` |
| |
| ### View the node topology under a specific node {:#view-the-node-topology-under-a-specific-node} |
| |
| To view only a subgraph of the node topology under a specific node, |
| run the following command: |
| |
| ```posix-terminal |
| ffx driver dump <NODE_NAME> |
| ``` |
| |
| Replace `NODE_NAME` with the name of your target node, for example: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver dump goldfish-control |
| [goldfish-control] pid=5521 fuchsia-boot:///goldfish_display#meta/goldfish-display.cm |
| [goldfish-display] pid=5521 fuchsia-boot:///display-coordinator#meta/display-coordinator.cm |
| [display-coordinator] pid=None unbound |
| ... |
| ``` |
| |
| ### Graph the node topology {:#graph-the-node-topology} |
| |
| To graph the node topology, run the following command: |
| |
| ```posix-terminal |
| ffx driver node graph |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver node graph |
| digraph { |
| forcelabels = true; splines="ortho"; ranksep = 5; nodesep = 1; |
| node [ shape = "box" color = " #0a7965" penwidth = 2.25 fontname = "prompt medium" fontsize = 10 margin = 0.22 ]; |
| edge [ color = " #283238" penwidth = 1 style = solid fontname = "roboto mono" fontsize = 10 ]; |
| rankdir = "TB" |
| subgraph "cluster_19434" { |
| label = "Host 19434"; |
| style = "filled,rounded"; |
| fillcolor = " #b1b9be"; |
| subgraph "cluster_19434_virtual-audio-driver.cm" { |
| label = "virtual-audio-driver.cm"; |
| style = "filled,rounded"; |
| fillcolor = " #dce0e3"; |
| "4358549555312" [label="virtual-audio", id = "4358549555312"] |
| "4358549791216" [label="virtual-audio", id = "4358549791216"] |
| } |
| } |
| ... |
| ``` |
| |
| #### Filtering {:#graph-the-node-topology-filtering} |
| |
| A full Fuchsia system graph can be quite large. Use the `--only` (or `-o`) |
| flag to filter the graph to specific sections. You can also use this flag |
| to filter for only bound or unbound nodes. |
| For example, the following command only graphs the relatives |
| of the 'virtio-input' node: |
| |
| ```posix-terminal |
| ffx driver node graph -o relatives:PCI0.bus.00_03_0.00_03_0.virtio-input |
| ``` |
| |
| Use the following filters with the `--only` flag |
| (the plural form, i.e., `ancestors`, is also accepted and has the same effect): |
| |
| - `--only bound` |
| Shows only bound nodes. A node is bound if it meets any of the following conditions: |
| - A driver binds to it directly. |
| - It is a parent to a composite node. |
| - Its parent node explicitly owns it. |
| - `--only unbound` |
| Shows only unbound nodes (nodes that meet none of the bound conditions). |
| - `--only ancestor(s):dev.sys.xyz` |
| Shows only the ancestors of the specified node. |
| - `--only descendant(s):dev.sys.xyz` |
| Shows only the descendants of the specified node. |
| - `--only relative(s):dev.sys.xyz` |
| Shows only the relatives of the specified node. Relatives are both ancestors and descendants. |
| - `--only sibling(s):dev.sys.xyz` |
| Shows only the siblings of the specified node. |
| - `--only primary_ancestor(s):dev.sys.xyz` |
| Same as ancestor, but for composite nodes, it only traverses the primary parent. |
| - `--only primary_relative(s):dev.sys.xyz` |
| Same as relative, but for composite nodes, it only traverses the primary parent. |
| - `--only primary_sibling(s):dev.sys.xyz` |
| Same as sibling, but if the filter target is a composite node, this filter only |
| includes children from its primary parent. |
| |
| #### Showing service routes {:#graph-the-node-topology-services} |
| |
| You can add service routes to the graph with the `--services` flag. The graph |
| displays these routes with an arrowhead to distinguish them from |
| parent/child relationships. |
| |
| Adding service routes can create a very large graph that can overwhelm the graphic engine. |
| To avoid this, always use this flag with a filter. For example: |
| |
| |
| ```posix-terminal |
| ffx driver node graph --services -o relatives:PCI0.bus.00_03_0.00_03_0.virtio-input |
| ``` |
| |
| #### Creating the graph image {:#graph-the-node-topology-creating} |
| |
| To convert this output to a `png` file, you can install the |
| [`dot`][dot]{:.external} command and pass the output to generate |
| the `png` file. Alternatively, you can paste the output to |
| [GraphViz][graphviz]{:.external}. |
| |
| #### Generating an interactive graph {:#graph-the-node-topology-interactive} |
| |
| You can generate an interactive HTML page from the SVG output to more easily |
| explore the graph. This HTML page lets you hover over and highlight service or parent/child routes. |
| |
| To create the HTML file with a single command, pipe the graph output through `dot` |
| and then pipe the resulting SVG back into the graph command with the `--html` flag. |
| |
| For example: |
| |
| ```posix-terminal |
| ffx driver node graph --services -o relatives:PCI0.bus.00_03_0.00_03_0.virtio-input | \ |
| dot -Tsvg | \ |
| ffx driver node graph --html > local/graph.html |
| ``` |
| |
| If you use `GraphViz`, you can provide an existing SVG file with the `--svg` flag |
| instead of piping the output from `dot`. |
| |
| ## View device nodes {:#view-device-nodes} |
| |
| To view the properties of all [device nodes][device-nodes] on your |
| Fuchsia device, run the following command: |
| |
| ```posix-terminal |
| ffx driver node list |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver node list |
| root |
| dev.sys |
| dev.sys.platform |
| ram-disk |
| ram-nand |
| virtual-audio |
| bt-hci-emulator |
| fake-battery |
| board |
| 00_00_1b |
| ram-disk.ramctl |
| virtual-audio.virtual_audio |
| fake-battery.fake-battery |
| fake-battery.power-simulator |
| PCI0 |
| acpi |
| 00_00_1b.sysmem |
| PCI0.bus |
| acpi.acpi-_SB_ |
| acpi.acpi-_TZ_ |
| 00_00_1b.sysmem.sysmem-banjo |
| 00_00_1b.sysmem.sysmem-fidl |
| PCI0.bus.00_00_0 |
| PCI0.bus.00_01_0 |
| PCI0.bus.00_02_0 |
| ... |
| ``` |
| |
| To view the state and owner information of device nodes, run the command with the -`v` flag: |
| |
| ```posix-terminal |
| ffx driver node list -v |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver node list -v |
| ... |
| State Moniker Owner |
| Bound root fuchsia-boot:///platform-bus#meta/platform-bus.cm |
| Bound dev.sys parent |
| Bound dev.sys.platform parent |
| Bound board fuchsia-boot:///platform-bus-x86#meta/platform-bus-x86.cm |
| Bound virtual-audio fuchsia-pkg://fuchsia.com/virtual-audio#meta/virtual-audio-driver.cm |
| Bound virtual-audio-legacy fuchsia-pkg://fuchsia.com/virtual-audio-legacy#meta/virtual-audio-legacy-driver.cm |
| Bound fake-battery fuchsia-pkg://fuchsia.com/fake_battery#meta/fake_battery.cm |
| Bound PCI0 fuchsia-boot:///bus-pci#meta/bus-pci.cm |
| Bound acpi parent |
| Bound virtual-audio.virtual-audio parent |
| Bound virtual-audio-legacy.virtual-audio-legacy parent |
| Bound PCI0.bus parent |
| Bound acpi._SB_ parent |
| Bound acpi._TZ_ parent |
| Unbound PCI0.bus.00_00_0 none |
| ... |
| ``` |
| |
| To view the properties of a specific device node with more detailed information use `ffx driver node show`: |
| |
| ```posix-terminal |
| ffx driver node show virtual-audio |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver node show virtual-audio |
| Name: virtual-audio |
| Moniker: virtual-audio |
| Owner: fuchsia-pkg://fuchsia.com/virtual-audio#meta/virtual-audio-driver.cm |
| Node State: Bound |
| Host Koid: 19434 |
| Parent Count: 1 |
| Child Count: 1 |
| |
| Bus Topology: Bus Type Stability Address |
| Platform Stable virtual-audio |
| |
| Node Properties: Key Value |
| fuchsia.BIND_PLATFORM_DEV_VID 0 |
| fuchsia.BIND_PLATFORM_DEV_PID 0 |
| fuchsia.BIND_PLATFORM_DEV_DID 57 |
| fuchsia.BIND_PLATFORM_DEV_INSTANCE_ID 0 |
| fuchsia.BIND_PROTOCOL 85 |
| fuchsia.resource.MMIO_COUNT 0 |
| fuchsia.resource.INTERRUPT_COUNT 0 |
| fuchsia.resource.BTI_COUNT 0 |
| fuchsia.resource.SMC_COUNT 0 |
| fuchsia.hardware.platform.device.Service fuchsia.hardware.platform.device.Service.ZirconTransport |
| |
| Node Offers: Service Source Instances |
| fuchsia.hardware.platform.device.Service dev default |
| |
| |
| ``` |
| |
| ### Filter for specific device nodes {:#view-device-nodes-filtering} |
| |
| You can filter the list of nodes using the same filters described in the |
| [filtering](#graph-the-node-topology-filtering) section. |
| |
| For example, this example only lists the descendants of the specified node: |
| |
| ```posix-terminal |
| ffx driver node list -o descendants:<NODE> |
| ``` |
| |
| Replace `<NODE>` with a component moniker. |
| |
| This example filters the results to only show the descendants of the `acpi` node: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver node list -o descendants:acpi |
| acpi |
| acpi.acpi-_SB_ |
| acpi.acpi-_TZ_ |
| acpi.acpi-_SB_.pt |
| acpi.acpi-_SB_.acpi-PCI0 |
| acpi.acpi-_SB_.acpi-HPET |
| acpi.acpi-_SB_.acpi-LNKE |
| acpi.acpi-_SB_.acpi-LNKF |
| acpi.acpi-_SB_.acpi-LNKG |
| acpi.acpi-_SB_.acpi-LNKH |
| acpi.acpi-_SB_.acpi-GSIE |
| acpi.acpi-_SB_.acpi-GSIF |
| acpi.acpi-_SB_.acpi-GSIG |
| acpi.acpi-_SB_.acpi-GSIH |
| ... |
| ``` |
| |
| ## View composite nodes {:#view-composite-nodes} |
| |
| To view all composite nodes on your Fuchsia device, |
| run the following command: |
| |
| ```posix-terminal |
| ffx driver list-composites |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list-composites |
| ... |
| acpi-GFRO-composite |
| acpi-CPUS-composite |
| acpi-_TZ_-composite |
| goldfish-control-2 |
| 00:00.0 |
| 00:01.0 |
| 00:02.0 |
| 00:03.0 |
| 00:04.0 |
| 00:05.0 |
| 00:06.0 |
| 00:0b.0 |
| ... |
| ``` |
| |
| To view composite nodes with more detailed information, |
| run the command with the -`v` flag: |
| |
| ```posix-terminal |
| ffx driver list-composites -v |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list-composites -v |
| ... |
| Name : 00_02_0 |
| Driver : fuchsia-boot:///#meta/virtio_block.cm |
| Device : dev/sys/platform/pt/PCI0/bus/00:02.0/00_02_0 |
| Parents : 3 |
| Parent 0 : sysmem |
| Device : dev/sys/platform/00:00:1b/sysmem/sysmem-fidl |
| Parent 1 : pci (Primary) |
| Device : dev/sys/platform/pt/PCI0/bus/00:02.0 |
| Parent 2 : acpi |
| Device : dev/sys/platform/pt/acpi/acpi-_SB_/acpi-PCI0/acpi-S10_/pt |
| ... |
| ``` |
| |
| ## View composite node specifications {:#view-composite-node-specifications} |
| |
| To view all composite node specifications on your Fuchsia |
| device, run the following command: |
| |
| ```posix-terminal |
| ffx driver list-composite-node-specs |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list-composite-node-specs |
| ... |
| 00_1f_0 : None |
| 00_1f_2 : fuchsia-boot:///ahci#meta/ahci.cm |
| 00_06_0 : None |
| 00_02_0 : fuchsia-boot:///virtio_block#meta/virtio_block.cm |
| 00_1f_3 : None |
| 00_05_0 : fuchsia-boot:///virtio_input#meta/virtio_input.cm |
| 00_0b_0 : fuchsia-boot:///goldfish_address_space#meta/goldfish_address_space.cm |
| 00_01_0 : fuchsia-boot:///intel-hda#meta/intel-hda.cm |
| 00_03_0 : fuchsia-boot:///virtio_input#meta/virtio_input.cm |
| 00_04_0 : fuchsia-boot:///virtio_netdevice#meta/virtio_netdevice.cm |
| 00_00_0 : None |
| ... |
| ``` |
| |
| To view composite node specifications with more detailed |
| information, run the command with the -`v` flag: |
| |
| ```posix-terminal |
| ffx driver list-composite-node-specs -v |
| ``` |
| |
| This command prints output similar to the following: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver list-composite-node-specs -v |
| ... |
| Name : ft3x27_touch |
| Driver : fuchsia-boot:///#meta/focaltech.cm |
| Nodes : 2 |
| Node 0 : "i2c" (Primary) |
| 3 Bind Rules |
| [ 1/ 3] : Accept "fuchsia.BIND_FIDL_PROTOCOL" { 0x000003 } |
| [ 2/ 3] : Accept "fuchsia.BIND_I2C_BUS_ID" { 0x000001 } |
| [ 3/ 3] : Accept "fuchsia.BIND_I2C_ADDRESS" { 0x000038 } |
| 2 Properties |
| [ 1/ 2] : Key "fuchsia.BIND_FIDL_PROTOCOL" Value 0x000003 |
| [ 2/ 2] : Key "fuchsia.BIND_I2C_ADDRESS" Value 0x000038 |
| Node 1 : "gpio-int" |
| 2 Bind Rules |
| [ 1/ 2] : Accept "fuchsia.BIND_PROTOCOL" { 0x000014 } |
| [ 2/ 2] : Accept "fuchsia.BIND_GPIO_PIN" { 0x000004 } |
| 2 Properties |
| [ 1/ 2] : Key "fuchsia.BIND_PROTOCOL" Value 0x000014 |
| [ 2/ 2] : Key "fuchsia.gpio.FUNCTION" Value "fuchsia.gpio.FUNCTION.TOUCH_INTERRUPT" |
| ... |
| ``` |
| |
| ## Appendices |
| |
| ### Register a component as a driver {:#register-a-component-as-a-driver} |
| |
| To register a component as a driver to your Fuchsia device, |
| run the following command: |
| |
| ```posix-terminal |
| ffx driver register <URL> |
| ``` |
| |
| Replace `URL` with a component URL from your Fuchsia package |
| server, for example: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver register fuchsia-pkg://fuchsia.com/my_example#meta/my_new_driver.cm |
| ``` |
| |
| ### Disable a driver {:#disable-a-driver} |
| |
| To disable (that is, de-register) a driver from your Fuchsia device, |
| run the following command: |
| |
| ```posix-terminal |
| ffx driver disable <URL> |
| ``` |
| |
| Replace `URL` with a component URL from your Fuchsia package |
| server, for example: |
| |
| ```none {:.devsite-disable-click-to-copy} |
| $ ffx driver disable fuchsia-pkg://fuchsia.com/my_example#meta/my_driver.cm |
| ``` |
| |
| <!-- Reference links --> |
| |
| [flash-a-device]: /docs/development/tools/ffx/workflows/flash-a-device.md |
| [fuchsia-emulator]: /docs/development/tools/ffx/workflows/start-the-fuchsia-emulator.md |
| [ssh-connection]: /docs/development/tools/ffx/workflows/create-ssh-keys-for-devices.md |
| [ffx-target-show]: /docs/development/tools/ffx/workflows/view-device-information.md#get_detailed_information_from_a_device |
| [dfv2]: /docs/concepts/drivers/driver_framework.md |
| [device-nodes]: /docs/concepts/drivers/drivers_and_nodes.md |
| [node-topology]: /docs/concepts/drivers/drivers_and_nodes.md#node_topology |
| [driver-host]: /docs/concepts/drivers/driver_framework.md#driver_host |
| [dot]: https://www.mankier.com/1/dot |
| [graphviz]: https://dreampuf.github.io/GraphvizOnline/#digraph |
