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// SPDX-License-Identifier: GPL-2.0
use core::{
array,
convert::Infallible, //
};
use kernel::{
device,
pci,
prelude::*,
time::Delta,
transmute::{
AsBytes,
FromBytes, //
}, //
};
use crate::{
driver::Bar0,
gsp::{
cmdq::{
Cmdq,
CommandToGsp,
MessageFromGsp, //
},
fw::{
commands::*,
MsgFunction, //
},
},
sbuffer::SBufferIter,
util,
};
/// The `GspSetSystemInfo` command.
pub(crate) struct SetSystemInfo<'a> {
pdev: &'a pci::Device<device::Bound>,
}
impl<'a> SetSystemInfo<'a> {
/// Creates a new `GspSetSystemInfo` command using the parameters of `pdev`.
pub(crate) fn new(pdev: &'a pci::Device<device::Bound>) -> Self {
Self { pdev }
}
}
impl<'a> CommandToGsp for SetSystemInfo<'a> {
const FUNCTION: MsgFunction = MsgFunction::GspSetSystemInfo;
type Command = GspSetSystemInfo;
type InitError = Error;
fn init(&self) -> impl Init<Self::Command, Self::InitError> {
GspSetSystemInfo::init(self.pdev)
}
}
struct RegistryEntry {
key: &'static str,
value: u32,
}
/// The `SetRegistry` command.
pub(crate) struct SetRegistry {
entries: [RegistryEntry; Self::NUM_ENTRIES],
}
impl SetRegistry {
// For now we hard-code the registry entries. Future work will allow others to
// be added as module parameters.
const NUM_ENTRIES: usize = 3;
/// Creates a new `SetRegistry` command, using a set of hardcoded entries.
pub(crate) fn new() -> Self {
Self {
entries: [
// RMSecBusResetEnable - enables PCI secondary bus reset
RegistryEntry {
key: "RMSecBusResetEnable",
value: 1,
},
// RMForcePcieConfigSave - forces GSP-RM to preserve PCI configuration registers on
// any PCI reset.
RegistryEntry {
key: "RMForcePcieConfigSave",
value: 1,
},
// RMDevidCheckIgnore - allows GSP-RM to boot even if the PCI dev ID is not found
// in the internal product name database.
RegistryEntry {
key: "RMDevidCheckIgnore",
value: 1,
},
],
}
}
}
impl CommandToGsp for SetRegistry {
const FUNCTION: MsgFunction = MsgFunction::SetRegistry;
type Command = PackedRegistryTable;
type InitError = Infallible;
fn init(&self) -> impl Init<Self::Command, Self::InitError> {
PackedRegistryTable::init(Self::NUM_ENTRIES as u32, self.variable_payload_len() as u32)
}
fn variable_payload_len(&self) -> usize {
let mut key_size = 0;
for i in 0..Self::NUM_ENTRIES {
key_size += self.entries[i].key.len() + 1; // +1 for NULL terminator
}
Self::NUM_ENTRIES * size_of::<PackedRegistryEntry>() + key_size
}
fn init_variable_payload(
&self,
dst: &mut SBufferIter<core::array::IntoIter<&mut [u8], 2>>,
) -> Result {
let string_data_start_offset =
size_of::<PackedRegistryTable>() + Self::NUM_ENTRIES * size_of::<PackedRegistryEntry>();
// Array for string data.
let mut string_data = KVec::new();
for entry in self.entries.iter().take(Self::NUM_ENTRIES) {
dst.write_all(
PackedRegistryEntry::new(
(string_data_start_offset + string_data.len()) as u32,
entry.value,
)
.as_bytes(),
)?;
let key_bytes = entry.key.as_bytes();
string_data.extend_from_slice(key_bytes, GFP_KERNEL)?;
string_data.push(0, GFP_KERNEL)?;
}
dst.write_all(string_data.as_slice())
}
}
/// Message type for GSP initialization done notification.
struct GspInitDone {}
// SAFETY: `GspInitDone` is a zero-sized type with no bytes, therefore it
// trivially has no uninitialized bytes.
unsafe impl FromBytes for GspInitDone {}
impl MessageFromGsp for GspInitDone {
const FUNCTION: MsgFunction = MsgFunction::GspInitDone;
type InitError = Infallible;
type Message = GspInitDone;
fn read(
_msg: &Self::Message,
_sbuffer: &mut SBufferIter<array::IntoIter<&[u8], 2>>,
) -> Result<Self, Self::InitError> {
Ok(GspInitDone {})
}
}
/// Waits for GSP initialization to complete.
pub(crate) fn wait_gsp_init_done(cmdq: &mut Cmdq) -> Result {
loop {
match cmdq.receive_msg::<GspInitDone>(Delta::from_secs(10)) {
Ok(_) => break Ok(()),
Err(ERANGE) => continue,
Err(e) => break Err(e),
}
}
}
/// The `GetGspStaticInfo` command.
struct GetGspStaticInfo;
impl CommandToGsp for GetGspStaticInfo {
const FUNCTION: MsgFunction = MsgFunction::GetGspStaticInfo;
type Command = GspStaticConfigInfo;
type InitError = Infallible;
fn init(&self) -> impl Init<Self::Command, Self::InitError> {
GspStaticConfigInfo::init_zeroed()
}
}
/// The reply from the GSP to the [`GetGspInfo`] command.
pub(crate) struct GetGspStaticInfoReply {
gpu_name: [u8; 64],
}
impl MessageFromGsp for GetGspStaticInfoReply {
const FUNCTION: MsgFunction = MsgFunction::GetGspStaticInfo;
type Message = GspStaticConfigInfo;
type InitError = Infallible;
fn read(
msg: &Self::Message,
_sbuffer: &mut SBufferIter<array::IntoIter<&[u8], 2>>,
) -> Result<Self, Self::InitError> {
Ok(GetGspStaticInfoReply {
gpu_name: msg.gpu_name_str(),
})
}
}
impl GetGspStaticInfoReply {
/// Returns the name of the GPU as a string, or `None` if the string given by the GSP was
/// invalid.
pub(crate) fn gpu_name(&self) -> Option<&str> {
util::str_from_null_terminated(&self.gpu_name)
}
}
/// Send the [`GetGspInfo`] command and awaits for its reply.
pub(crate) fn get_gsp_info(cmdq: &mut Cmdq, bar: &Bar0) -> Result<GetGspStaticInfoReply> {
cmdq.send_command(bar, GetGspStaticInfo)?;
loop {
match cmdq.receive_msg::<GetGspStaticInfoReply>(Delta::from_secs(5)) {
Ok(info) => return Ok(info),
Err(ERANGE) => continue,
Err(e) => return Err(e),
}
}
}
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