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[Denali] Update the read many request to take a sector count as well.

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This greatly reduces the size of the message (we had surpassed the 1
page - 4KiB message limit with the previous method).
This commit is contained in:
Drew Galbraith 2023-11-22 12:17:56 -08:00
parent 9f0e87b51d
commit 41bf78cf98
5 changed files with 71 additions and 22 deletions
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32
sys/denali/denali_server.cpp
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@ -35,28 +35,30 @@ glcr::ErrorCode DenaliServer::HandleReadMany(const ReadManyRequest& req,
ReadResponse& resp) {
ASSIGN_OR_RETURN(AhciDevice * device, driver_.GetDevice(req.device_id()));
uint64_t region_paddr;
OwnedMemoryRegion region = OwnedMemoryRegion::ContiguousPhysical(
req.lba().size() * 512, &region_paddr);
if (req.lba().size() != req.sector_cnt().size()) {
return glcr::INVALID_ARGUMENT;
}
auto& vec = req.lba();
uint64_t curr_run_start = 0;
for (uint64_t i = 0; i < vec.size(); i++) {
if (i + 1 < vec.size() && vec.at(i) + 1 == vec.at(i + 1)) {
continue;
}
uint64_t lba = vec.at(curr_run_start);
uint64_t size = (i - curr_run_start) + 1;
uint64_t paddr = region_paddr + curr_run_start * 512;
DmaReadCommand command(lba, size, paddr);
uint64_t sector_cnt = 0;
for (uint64_t i = 0; i < req.sector_cnt().size(); i++) {
sector_cnt += req.sector_cnt().at(i);
}
uint64_t region_paddr;
OwnedMemoryRegion region =
OwnedMemoryRegion::ContiguousPhysical(sector_cnt * 512, &region_paddr);
for (uint64_t i = 0; i < req.lba().size(); i++) {
uint64_t lba = req.lba().at(i);
uint64_t size = req.sector_cnt().at(i);
DmaReadCommand command(lba, size, region_paddr);
device->IssueCommand(&command);
command.WaitComplete();
curr_run_start = i + 1;
region_paddr += size * 512;
}
resp.set_device_id(req.device_id());
resp.set_size(req.lba().size());
resp.set_size(sector_cnt);
resp.set_memory(region.DuplicateCap());
return glcr::OK;
}