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Command queueing is now generally disabled in PIO modes. No matter what

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the cause is, it didn't work over here at all in this combination.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10629 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2005-01-10 07:17:55 +00:00
parent c776c35a04
commit f04715b8fe
1 changed files with 20 additions and 9 deletions
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src/add-ons/kernel/bus_managers/ide/ide_sim.c
+20 -9
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@@ -1,5 +1,7 @@
/*
* Copyright 2005, Axel Dörfler, [email protected]. All rights reserved.
* Copyright 2002/03, Thomas Kurschel. All rights reserved.
*
* Distributed under the terms of the MIT License.
*/
@@ -166,7 +168,7 @@ err_inv_device:
return;
err_bus_busy:
SHOW_FLOW0( 3, "Bus busy" );
SHOW_FLOW0(3, "Bus busy");
FAST_LOG1(bus->log, ev_ide_scsi_io_bus_busy, (uint32)request);
IDE_UNLOCK(bus);
@@ -175,7 +177,7 @@ err_bus_busy:
return;
err_device_busy:
SHOW_FLOW0( 3, "Device busy" );
SHOW_FLOW0(3, "Device busy");
FAST_LOG1(bus->log, ev_ide_scsi_io_device_busy, (uint32)request);
IDE_UNLOCK(bus);
@@ -184,7 +186,7 @@ err_device_busy:
return;
err_disconnected:
SHOW_ERROR0( 3, "No controller anymore" );
SHOW_ERROR0(3, "No controller anymore");
FAST_LOG1(bus->log, ev_ide_scsi_io_disconnected, (uint32)request);
request->subsys_status = SCSI_NO_HBA;
scsi->finished(request, 1);
@@ -617,12 +619,21 @@ ide_sim_init_bus(pnp_node_handle node, void *user_cookie, void **cookie)
SHOW_FLOW(2, "can_dma: %d", bus->can_DMA);
if (pnp->get_attr_uint8(node, IDE_CONTROLLER_CAN_CQ_ITEM, &bus->can_CQ, true) != B_OK)
// per default, command queuing is supported unless the driver
// reports problems (queuing should be transparent to
// controller, but for sure there is some buggy, over-optimizing
// controller out there)
bus->can_CQ = true;
if (bus->can_DMA) {
if (pnp->get_attr_uint8(node, IDE_CONTROLLER_CAN_CQ_ITEM, &bus->can_CQ, true) != B_OK) {
// per default, command queuing is supported unless the driver
// reports problems (queuing should be transparent to
// controller, but for sure there is some buggy, over-optimizing
// controller out there)
bus->can_CQ = true;
}
} else {
// I am not sure if it's a problem of the driver or the drive (probably the
// former), but we're generally disable command queueing in case of PIO
// transfers. Since those should be rare on a real system (as is CQ support
// in the drive), it's not really worth investigating, though.
bus->can_CQ = false;
}
res = pnp->load_driver(pnp->get_parent(node), bus,
(pnp_driver_info **)&bus->controller,