Daniel Samson
23bcd77c58
Every user binary and the two device-logic library modules (pci, usb) now
`@import` the concern modules directly instead of aliasing through `runtime`:
runtime.ipc/process/time/service/input/block/display -> @import("<module>")
runtime.device / runtime.device_manager -> @import("driver")
runtime.fs -> @import("file-system")
runtime.Thread -> @import("thread").Thread
runtime.system.{write,writeRecord,klog*} -> logging.*
runtime.system.{sleep,timerOnce,wallClock,clock} -> time.*
runtime.system.{spawn*,kill,exit,yield,processes,...}-> process.*
runtime.system.{mmap,munmap,PROT_*} -> memory.*
runtime.dma.* / runtime.shared_memory.* / runtime.allocator -> memory.*
Each consumer keeps its own alias name (e.g. `const device = @import("driver")`),
so call sites are unchanged and there are no collisions with local `driver`
variables. build.zig now injects the concern modules into every user binary via
`default_imports`; pci/usb module import lists were updated to match.
The `runtime` and `system` shims remain for one more step (root.zig still uses
runtime); they are deleted in C5. Nothing but root.zig imports `runtime` now.
Verified: zig build, zig build test, and 17 QEMU cases (smoke, device-manager,
logger, fat-mount, fat-mutations, usb-storage, usb-hid, display-native,
virtio-gpu, input, thread-spawn, thread-mutex, process-kill, shared-memory,
driver-restart, acpi-ps2, pci-scan).
60 lines
2.3 KiB
Zig
60 lines
2.3 KiB
Zig
//! /system/drivers/display - the generic display engine driver.
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//! This driver is a non official driver for GPU vendors like Intel, NVIDIA, AMD. It provides basic
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//! display engine features to the display engine protocol used by the display server, compositor
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//! and graphical user interface libraries like Zooeee.
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//!
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//! This driver is acts like BUS driver, in that it detects the GPU, its capabilities and loads
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//! sub-drivers for each device detected. Similar The device manager
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//! finds display adaptor e.g. over the PCI/ACPI, and passes the buck on to this driver to handle.
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//!
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//! The display driver provides the low level part of identifying the device and launching the
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//! generic device driver for a GPU vendor.
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//!
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//! It takes over the framebuffer feature that was setup during system boot.
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const std = @import("std");
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const device = @import("driver");
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const ipc = @import("ipc");
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const process = @import("process");
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const service = @import("service");
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const device_manager = @import("driver");
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const logging = @import("logging");
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const mmio = @import("mmio");
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const display_protocol = @import("display-protocol");
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const scanout_protocol = @import("scanout-protocol");
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var device_id: u64 = 0;
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fn initialise(endpoint: ipc.Handle) bool {
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_ = endpoint;
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// Hello the device manager (role: device — we claim one GPU's PCI function
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// and serve its display engine; we report no children). Best-effort: without a
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// manager the driver still runs standalone; when present, the manager marks us
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// up before the hello deadline and restarts us if we die.
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_ = device_manager.hello(.device, device_id);
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return true;
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}
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fn onMessage(message: []const u8, reply: []u8, sender: u32, capability: ?ipc.Handle) usize {
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_ = sender;
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_ = capability;
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_ = reply;
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if (message.len < scanout_protocol.request_size) return 0;
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return 0;
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}
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pub fn main(init: process.Init) void {
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const argument = init.arguments.get(1) orelse {
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_ = logging.write("display: missing device id (argv[1])\n");
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return;
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};
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device_id = std.fmt.parseInt(u64, argument, 10) catch {
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std.log.info("malformed device id '{s}'", .{argument});
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return;
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};
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service.run(256, .{
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.service = .scanout,
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.init = initialise,
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.on_message = onMessage,
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});
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}
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