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Working AHCI DMA IPC from yellowstone to denali.

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We have a weird bug in context switching where a process's rsp0 ends up
pointing at the wrong value sometimes which crashes the OS.
This commit is contained in:
Drew Galbraith 2023-06-16 01:31:23 -07:00
parent ccfe1b15ab
commit e5da93757a
11 changed files with 171 additions and 84 deletions
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38
sys/denali/denali_server.cpp
View file

@ -3,8 +3,17 @@
#include <mammoth/debug.h>
#include <zcall.h>
namespace {
DenaliServer* gServer = nullptr;
void HandleResponse(uint64_t lba, uint64_t size, uint64_t cap) {
gServer->HandleResponse(lba, size, cap);
}
} // namespace
DenaliServer::DenaliServer(uint64_t channel_cap, AhciDriver& driver)
: channel_cap_(channel_cap), driver_(driver) {}
: channel_cap_(channel_cap), driver_(driver) {
gServer = this;
}
z_err_t DenaliServer::RunServer() {
while (true) {
@ -20,12 +29,7 @@ z_err_t DenaliServer::RunServer() {
case DENALI_READ: {
DenaliRead* read_req = reinterpret_cast<DenaliRead*>(read_buffer_);
uint64_t memcap = 0;
DenaliReadResponse resp;
RET_ERR(HandleRead(*read_req, resp, memcap));
uint64_t caps_len = memcap ? 1 : 0;
RET_ERR(ZChannelSend(channel_cap_, 0, sizeof(DenaliReadResponse),
reinterpret_cast<uint8_t*>(&resp), caps_len,
&memcap));
RET_ERR(HandleRead(*read_req));
break;
}
default:
@ -35,10 +39,22 @@ z_err_t DenaliServer::RunServer() {
}
}
z_err_t DenaliServer::HandleRead(const DenaliRead& read,
DenaliReadResponse& resp, uint64_t& memcap) {
AhciDevice device;
RET_ERR(driver_.GetDevice(read.device_id, device));
z_err_t DenaliServer::HandleRead(const DenaliRead& read) {
AhciDevice* device;
RET_ERR(driver_.GetDevice(read.device_id, &device));
device->IssueCommand(
new DmaReadCommand(read.lba, read.size, ::HandleResponse));
return Z_OK;
}
void DenaliServer::HandleResponse(uint64_t lba, uint64_t size, uint64_t cap) {
DenaliReadResponse resp{
.device_id = 0,
.lba = lba,
.size = size,
};
check(ZChannelSend(channel_cap_, DENALI_READ, sizeof(resp),
reinterpret_cast<uint8_t*>(&resp), 1, &cap));
}