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[Denali] Use mutexes to synchronize the AHCI responses.

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This is a temporary solution to allow denali to migrate to the
yunq framework until we have a good async solution.
This commit is contained in:
Drew Galbraith 2023-10-25 19:39:09 -07:00
parent adfffdd3c3
commit acfaf26391
4 changed files with 20 additions and 30 deletions
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31
sys/denali/denali_server.cpp
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@ -5,14 +5,6 @@
#include <mammoth/debug.h>
#include <zcall.h>
namespace {
DenaliServer* gServer = nullptr;
void HandleResponse(ResponseContext& response, uint64_t lba, uint64_t size,
z_cap_t mem) {
gServer->HandleResponse(response, lba, size, mem);
}
} // namespace
glcr::ErrorOr<glcr::UniquePtr<DenaliServer>> DenaliServer::Create(
AhciDriver& driver) {
z_cap_t cap;
@ -45,19 +37,20 @@ glcr::ErrorCode DenaliServer::HandleRequest(RequestContext& request,
glcr::ErrorCode DenaliServer::HandleRead(DenaliReadRequest* request,
ResponseContext& context) {
ASSIGN_OR_RETURN(AhciDevice * device, driver_.GetDevice(request->device_id));
ASSIGN_OR_RETURN(Mutex mutex, Mutex::Create());
RET_ERR(mutex.Lock());
device->IssueCommand(new DmaReadCommand(request->lba, request->size,
::HandleResponse, context));
DmaReadCommand command(request->lba, request->size, mutex, context);
device->IssueCommand(&command);
return glcr::OK;
}
void DenaliServer::HandleResponse(ResponseContext& response, uint64_t lba,
uint64_t size, z_cap_t mem) {
// Wait for read operation to complete.
RET_ERR(mutex.Lock());
RET_ERR(mutex.Release());
DenaliReadResponse resp{
.device_id = 0,
.lba = lba,
.size = size,
.device_id = request->device_id,
.lba = request->lba,
.size = request->size,
};
check(response.WriteStructWithCap<DenaliReadResponse>(resp, mem));
return context.WriteStructWithCap<DenaliReadResponse>(
resp, command.GetMemoryRegion());
}