lby/lk
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[dev][block][ahci] continue if PxSIG is 0xfffffffff

Browse Source 
This seems to happen if the device had not been frobbed by any firmware
prior to handing off to the system. Seems that a proper reset is in
order, but for now simply ignore it, assume it's a disk, and continue.
This commit is contained in:
Travis Geiselbrecht
2022-02-06 01:32:42 -08:00
committed by Travis Geiselbrecht
parent f16fd2e9c6
commit e9079cb7ee
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
dev/block/ahci/port.cpp
View File

@@ -48,13 +48,15 @@ status_t ahci_port::probe(ahci_disk **found_disk) {
if (BITS_SHIFT(ssts, 11, 8) != 1) { // check SSTS.IPM == 1 (interface in active state)
return ERR_NOT_FOUND;
}
dprintf(INFO, "ahci%d port %u: device present and interface in active state\n",
ahci_.get_unit_num(), num_);
dprintf(INFO, "ahci%d port %u: ssts %#x device present and interface in active state\n",
ahci_.get_unit_num(), num_, ssts);
auto sig = read_port_reg(ahci_port_reg::PxSIG);
LTRACEF("port %u: sig %#x\n", num_, sig);
if (sig != 0x101) { // we can only handle SATA drives now
// if sig is all 1s then it hasn't been scanned yet, so assume it's a disk.
// otherwise if its 0x101 it's a disk
if (sig != 0xffffffff && sig != 0x101) {
TRACEF("skipping unhandled signature %#x\n", sig);
return ERR_NOT_FOUND;
}