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|
// SPDX-License-Identifier: GPL-2.0 or MIT
use kernel::c_str;
use kernel::clk::Clk;
use kernel::clk::OptionalClk;
use kernel::device::Bound;
use kernel::device::Core;
use kernel::device::Device;
use kernel::devres::Devres;
use kernel::drm;
use kernel::drm::ioctl;
use kernel::new_mutex;
use kernel::of;
use kernel::platform;
use kernel::prelude::*;
use kernel::regulator;
use kernel::regulator::Regulator;
use kernel::sizes::SZ_2M;
use kernel::sync::Arc;
use kernel::sync::Mutex;
use kernel::time;
use kernel::types::ARef;
use crate::file::File;
use crate::gem::TyrObject;
use crate::gpu;
use crate::gpu::GpuInfo;
use crate::regs;
pub(crate) type IoMem = kernel::io::mem::IoMem<SZ_2M>;
/// Convenience type alias for the DRM device type for this driver.
pub(crate) type TyrDevice = drm::Device<TyrDriver>;
#[pin_data(PinnedDrop)]
pub(crate) struct TyrDriver {
device: ARef<TyrDevice>,
}
#[pin_data(PinnedDrop)]
pub(crate) struct TyrData {
pub(crate) pdev: ARef<platform::Device>,
#[pin]
clks: Mutex<Clocks>,
#[pin]
regulators: Mutex<Regulators>,
/// Some information on the GPU.
///
/// This is mainly queried by userspace, i.e.: Mesa.
pub(crate) gpu_info: GpuInfo,
}
// Both `Clk` and `Regulator` do not implement `Send` or `Sync`, but they
// should. There are patches on the mailing list to address this, but they have
// not landed yet.
//
// For now, add this workaround so that this patch compiles with the promise
// that it will be removed in a future patch.
//
// SAFETY: This will be removed in a future patch.
unsafe impl Send for TyrData {}
// SAFETY: This will be removed in a future patch.
unsafe impl Sync for TyrData {}
fn issue_soft_reset(dev: &Device<Bound>, iomem: &Devres<IoMem>) -> Result {
regs::GPU_CMD.write(dev, iomem, regs::GPU_CMD_SOFT_RESET)?;
// TODO: We cannot poll, as there is no support in Rust currently, so we
// sleep. Change this when read_poll_timeout() is implemented in Rust.
kernel::time::delay::fsleep(time::Delta::from_millis(100));
if regs::GPU_IRQ_RAWSTAT.read(dev, iomem)? & regs::GPU_IRQ_RAWSTAT_RESET_COMPLETED == 0 {
dev_err!(dev, "GPU reset failed with errno\n");
dev_err!(
dev,
"GPU_INT_RAWSTAT is {}\n",
regs::GPU_IRQ_RAWSTAT.read(dev, iomem)?
);
return Err(EIO);
}
Ok(())
}
kernel::of_device_table!(
OF_TABLE,
MODULE_OF_TABLE,
<TyrDriver as platform::Driver>::IdInfo,
[
(of::DeviceId::new(c_str!("rockchip,rk3588-mali")), ()),
(of::DeviceId::new(c_str!("arm,mali-valhall-csf")), ())
]
);
impl platform::Driver for TyrDriver {
type IdInfo = ();
const OF_ID_TABLE: Option<of::IdTable<Self::IdInfo>> = Some(&OF_TABLE);
fn probe(
pdev: &platform::Device<Core>,
_info: Option<&Self::IdInfo>,
) -> Result<Pin<KBox<Self>>> {
let core_clk = Clk::get(pdev.as_ref(), Some(c_str!("core")))?;
let stacks_clk = OptionalClk::get(pdev.as_ref(), Some(c_str!("stacks")))?;
let coregroup_clk = OptionalClk::get(pdev.as_ref(), Some(c_str!("coregroup")))?;
core_clk.prepare_enable()?;
stacks_clk.prepare_enable()?;
coregroup_clk.prepare_enable()?;
let mali_regulator = Regulator::<regulator::Enabled>::get(pdev.as_ref(), c_str!("mali"))?;
let sram_regulator = Regulator::<regulator::Enabled>::get(pdev.as_ref(), c_str!("sram"))?;
let request = pdev.io_request_by_index(0).ok_or(ENODEV)?;
let iomem = Arc::pin_init(request.iomap_sized::<SZ_2M>(), GFP_KERNEL)?;
issue_soft_reset(pdev.as_ref(), &iomem)?;
gpu::l2_power_on(pdev.as_ref(), &iomem)?;
let gpu_info = GpuInfo::new(pdev.as_ref(), &iomem)?;
gpu_info.log(pdev);
let platform: ARef<platform::Device> = pdev.into();
let data = try_pin_init!(TyrData {
pdev: platform.clone(),
clks <- new_mutex!(Clocks {
core: core_clk,
stacks: stacks_clk,
coregroup: coregroup_clk,
}),
regulators <- new_mutex!(Regulators {
mali: mali_regulator,
sram: sram_regulator,
}),
gpu_info,
});
let tdev: ARef<TyrDevice> = drm::Device::new(pdev.as_ref(), data)?;
drm::driver::Registration::new_foreign_owned(&tdev, pdev.as_ref(), 0)?;
let driver = KBox::pin_init(try_pin_init!(TyrDriver { device: tdev }), GFP_KERNEL)?;
// We need this to be dev_info!() because dev_dbg!() does not work at
// all in Rust for now, and we need to see whether probe succeeded.
dev_info!(pdev.as_ref(), "Tyr initialized correctly.\n");
Ok(driver)
}
}
#[pinned_drop]
impl PinnedDrop for TyrDriver {
fn drop(self: Pin<&mut Self>) {}
}
#[pinned_drop]
impl PinnedDrop for TyrData {
fn drop(self: Pin<&mut Self>) {
// TODO: the type-state pattern for Clks will fix this.
let clks = self.clks.lock();
clks.core.disable_unprepare();
clks.stacks.disable_unprepare();
clks.coregroup.disable_unprepare();
}
}
// We need to retain the name "panthor" to achieve drop-in compatibility with
// the C driver in the userspace stack.
const INFO: drm::DriverInfo = drm::DriverInfo {
major: 1,
minor: 5,
patchlevel: 0,
name: c_str!("panthor"),
desc: c_str!("ARM Mali Tyr DRM driver"),
};
#[vtable]
impl drm::Driver for TyrDriver {
type Data = TyrData;
type File = File;
type Object = drm::gem::Object<TyrObject>;
const INFO: drm::DriverInfo = INFO;
kernel::declare_drm_ioctls! {
(PANTHOR_DEV_QUERY, drm_panthor_dev_query, ioctl::RENDER_ALLOW, File::dev_query),
}
}
#[pin_data]
struct Clocks {
core: Clk,
stacks: OptionalClk,
coregroup: OptionalClk,
}
#[pin_data]
struct Regulators {
mali: Regulator<regulator::Enabled>,
sram: Regulator<regulator::Enabled>,
}
|
