ffx driver 指令可擷取 Fuchsia 裝置上的驅動程式的各種相關資訊。
概念
ffx driver 指令可擷取目前「可用」，或目標「Fuchia 裝置」 (或「模擬器」) 上「可用」的驅動程式相關資訊。不過，ffx driver 指令預期您可以從主機機器與目標 Fuchsia 裝置建立SSH 連線。如要驗證與裝置的連線，可以執行 ffx target show 指令。
使用 ffx driver 指令之前，建議您先熟悉驅動程式架構 (DFv2) 中的基本概念，特別是下列各項：
- 裝置節點：裝置節點代表硬體元件、虛擬裝置或硬體裝置的一部分。
- 節點拓撲 - 節點拓撲可說明系統中裝置節點之間的父項與子項關係。
- 驅動程式主機 - 驅動程式主機是以 Fuchsia 元件的形式執行，可區隔 Fuchsia 系統中的驅動程式。在 Fuchsia 中，每位驅動程式庫都住在驅動程式代管程序中，且可將多個驅動程式庫置於同一驅動程式代管程序中。
查看司機
如要查看 Fuchsia 裝置上所有可用的驅動程式，請執行下列指令：
ffx driver list
這個指令會輸出類似以下的輸出內容：
$ 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
...
如要查看 Fuchsia 裝置上所有可用驅動程式的詳細資訊，並加上 -v 標記，請執行下列指令：
ffx driver list -v
這個指令會輸出類似以下的輸出內容：
$ 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 ??
...
查看執行中的驅動程式
如要查看 Fuchsia 裝置上目前正在執行 (已載入) 的所有驅動程式，請搭配 -loaded 標記執行下列指令：
ffx driver list --loaded
這個指令會輸出類似以下的輸出內容：
$ 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
...
查看驅動程式庫主機
如要查看在 Fuchsia 裝置上執行的所有驅動程式主機，以及這些主機的驅動程式，請執行下列指令：
ffx driver list-hosts
這個指令會輸出類似以下的輸出內容：
$ 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
...
查看節點拓撲
如要查看 Fuchsia 裝置的完整節點拓撲，請執行下列指令：
ffx driver dump
這個指令會輸出類似以下的輸出內容：
$ ffx driver dump
[dev] pid=5521 fuchsia-boot:///platform-bus#meta/platform-bus.cm
[sys] pid=None unbound
[platform] pid=None unbound
[00_00_2d] pid=7584 fuchsia-boot:///ramdisk#meta/ramdisk.cm
[ramctl] pid=None unbound
[00_00_2e] pid=None unbound
[00_00_2f] pid=25117 fuchsia-pkg://fuchsia.com/virtual_audio#meta/virtual_audio_driver.cm
[virtual_audio] pid=None unbound
[00_00_30] pid=None unbound
[00_00_33] 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
...
查看特定節點下的節點拓撲
如果只要查看特定節點下節點拓撲的子圖表，請執行下列指令：
ffx driver dump <NODE_NAME>
將 NODE_NAME 替換成目標節點的名稱，例如：
$ 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
...
繪製節點拓撲的圖形
如要繪製節點拓撲圖，請執行下列指令：
ffx driver driver dump --graph
這個指令會輸出類似以下的輸出內容：
$ ffx driver driver dump --graph
digraph {
forcelabels = true; splines="ortho"; ranksep = 1.2; nodesep = 0.5;
node [ shape = "box" color = " #2a5b4f" penwidth = 2.25 fontname = "prompt medium" fontsize = 10 margin = 0.22 ];
edge [ color = " #37474f" penwidth = 1 style = dashed fontname = "roboto mono" fontsize = 10 ];
"3675787314320" [label="dev"]
"3675787305008" [label="sys"]
"3675787315872" [label="platform"]
"3675787309664" [label="00_00_2d"]
"3675787306560" [label="00_00_2e"]
"3675787308112" [label="00_00_2f"]
"3675787312768" [label="00_00_30"]
"3675787311216" [label="00_00_33"]
"3675787325184" [label="pt"]
"3675787317424" [label="00_00_1b"]
...
如要將此輸出內容轉換為 png 檔案，您可以安裝 dot 指令，並傳遞輸出內容，藉此產生 png 檔案。您也可以將輸出內容貼到 GraphViz。
查看裝置節點
如要查看 Fuuchsia 裝置上所有裝置節點的屬性，請執行下列指令：
ffx driver list-devices
這個指令會輸出類似以下的輸出內容：
$ ffx driver list-devices
dev
dev.sys
dev.sys.platform
dev.sys.platform.00_00_2d
dev.sys.platform.00_00_2e
dev.sys.platform.00_00_2f
dev.sys.platform.00_00_30
dev.sys.platform.00_00_33
dev.sys.platform.pt
dev.sys.platform.00_00_1b
dev.sys.platform.00_00_2d.ramctl
dev.sys.platform.00_00_2f.virtual_audio
dev.sys.platform.00_00_33.fake-battery
dev.sys.platform.00_00_33.power-simulator
dev.sys.platform.pt.PCI0
dev.sys.platform.pt.acpi
dev.sys.platform.00_00_1b.sysmem
dev.sys.platform.pt.PCI0.bus
dev.sys.platform.pt.acpi.acpi-_SB_
dev.sys.platform.pt.acpi.acpi-_TZ_
dev.sys.platform.00_00_1b.sysmem.sysmem-banjo
dev.sys.platform.00_00_1b.sysmem.sysmem-fidl
dev.sys.platform.pt.PCI0.bus.00_00.0
dev.sys.platform.pt.PCI0.bus.00_01.0
dev.sys.platform.pt.PCI0.bus.00_02.0
...
如要查看裝置節點的屬性以及更詳細的資訊，請以 -v 標記執行指令：
ffx driver list-devices -v
這個指令會輸出類似以下的輸出內容：
$ ffx driver list-devices -v
...
Name : i2c-child
Moniker : root.sys.platform.platform-passthrough.acpi.acpi-FWCF.i2c-child
Driver : None
3 Properties
[ 1/ 3] : Key "fuchsia.hardware.i2c" Value Enum(fuchsia.hardware.i2c.Device.ZirconTransport)
[ 2/ 3] : Key fuchsia.BIND_I2C_ADDRESS Value 0x0000ff
[ 3/ 3] : Key "fuchsia.driver.framework.dfv2" Value true
...
查看特定路徑下的裝置節點
如要查看節點拓撲中特定路徑篩選的裝置節點，請在指令中加入確切的拓撲路徑或裝置名稱：
ffx driver list-devices <NODE>
將 NODE 替換為拓撲路徑或裝置名稱。例如，以下範例顯示結果會依 acpi 的拓撲路徑進行篩選：
$ ffx driver list-devices acpi
dev.sys.platform.pt.acpi
dev.sys.platform.pt.acpi.acpi-_SB_
dev.sys.platform.pt.acpi.acpi-_TZ_
dev.sys.platform.pt.acpi.acpi-_SB_.pt
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-PCI0
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-HPET
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-LNKE
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-LNKF
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-LNKG
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-LNKH
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-GSIE
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-GSIF
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-GSIG
dev.sys.platform.pt.acpi.acpi-_SB_.acpi-GSIH
...
您也可以將這個引數與 -v 旗標結合使用，取得更詳細的資訊，例如：
$ ffx driver list-devices acpi -v
Name : acpi
Moniker : dev.sys.platform.pt.acpi
Driver : unbound
2 Properties
[ 1/ 2] : Key fuchsia.BIND_PROTOCOL Value 0x00001c
[ 2/ 2] : Key "fuchsia.platform.DRIVER_FRAMEWORK_VERSION" Value 0x000002
1 Offers
Service: fuchsia.driver.compat.Service
Source: dev.sys.platform.pt
Instances: default
Name : acpi-_SB_
Moniker : dev.sys.platform.pt.acpi.acpi-_SB_
Driver : unbound
2 Properties
[ 1/ 2] : Key fuchsia.BIND_PROTOCOL Value 0x00001c
[ 2/ 2] : Key "fuchsia.platform.DRIVER_FRAMEWORK_VERSION" Value 0x000002
1 Offers
Service: fuchsia.driver.compat.Service
Source: dev.sys.platform.pt
Instances: default
...
查看複合式節點
如要查看 Fuchsia 裝置上的所有複合節點，請執行下列指令：
ffx driver list-composites
這個指令會輸出類似以下的輸出內容：
$ 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
...
如要查看含有更詳細的資訊的複合式節點，請搭配 -v 標記執行指令：
ffx driver list-composites -v
這個指令會輸出類似以下的輸出內容：
$ 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
...
查看複合式節點規格
如要查看 Fuchsia 裝置上的所有複合節點規格，請執行下列指令：
ffx driver list-composite-node-specs
這個指令會輸出類似以下的輸出內容：
$ 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
...
如要查看含有更詳細的資訊的複合式節點規格，請搭配 -v 標記執行指令：
ffx driver list-composite-node-specs -v
這個指令會輸出類似以下的輸出內容：
$ 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"
...
附錄
將元件註冊為驅動程式庫
如要將元件註冊為 Fuchsia 裝置的驅動程式庫，請執行下列指令：
ffx driver register <URL>
將 URL 換成 Fuchsia 套件伺服器的元件網址，例如：
$ ffx driver register fuchsia-pkg://fuchsia.com/my_example#meta/my_new_driver.cm
停用驅動程式庫
如要從 Fuchsia 裝置停用 (即取消註冊) 驅動程式庫，請執行下列指令：
ffx driver disable <URL>
將 URL 換成 Fuchsia 套件伺服器的元件網址，例如：
$ ffx driver disable fuchsia-pkg://fuchsia.com/my_example#meta/my_driver.cm