src - OpenBSD base system

Age	Commit message (Collapse)	Author
2006-12-12	small cleanup after feng shui	David Gwynne

2006-12-12	after allocating the ahci_port bits, stash it in the softc rather than	David Gwynne
	drop it. im guessing at some point we'll want to use each port, knowing where they are can help.
2006-12-12	feng shui	David Gwynne

2006-12-12	for each port the controller says is hooked up, go and allocate our	David Gwynne
	ahci_port structs for it.
2006-12-12	start implementing the bits that allocate the per port structures and their	David Gwynne
	ccb lists. this is missing handling of the dmamem each port needs to manage, but that can wait till i figure out how it fits together. insane stuff.
2006-12-12	remember our dma tag. be able to do dma is like, really cool. man.	David Gwynne

2006-12-12	add functions to get and put ccbs out of each ports command free list.	David Gwynne

2006-12-12	add wrappers for reading and writing a ports registers called ahci_pread,	David Gwynne
	and ahci_pwrite. these will use an io handle into a window of the controllers register space that can be created with bus_space_subregion, and which is stored in the ahci_port struct.
2006-12-12	introduce the command control blocks, and the concept that they are managed	David Gwynne
	per port rather than as a big list for the whole controller. the softc has an array of pointers to a struct that manages all the shizz relevant to a particular port. when we map the controllers ports, we'll allocate these as needed. if the port isnt implemented, we leave its pointer in the softc null and use that to decide if a drive might be there or not, rather than lookup up the PI register all the time. a comparison has to null has to be cheaper than doing bit operations, surely.
2006-12-12	stash the number of commands each port can do in the softc	David Gwynne

2006-12-11	use oct bits consistently in the format string for %b. pointed out by	David Gwynne
	deraadt@
2006-12-11	oops, we want to return when everything goes well in ahci_attach, rather	David Gwynne
	than fall through to the bits that do cleanup when an error occurs.
2006-12-11	remove the argument to all the port registers that say which port you want	David Gwynne
	to address. instead make them simply offsets from the start of a ports register space, which is something we can easily set up with bus_space_subregion. this should make the code a lot easier to read later on.
2006-12-11	dont stash the implemented ports map, im going to use a different	David Gwynne
	mechanism to figure out if a port is usable or not later on.
2006-12-11	define the command structs used by the ports.	David Gwynne
	this stuff isnt endearing me to ata at all, and apparently ahci is a good ata controller. the command path looks way more complicated than it needs to be (or maybe i am used to really good scsi controllers, i dont know). a lot of the terminology seems annoyingly different just for the sake of being different. i mean, what is the advantage of calling a scatter gather lement a "physical region descriptor table"? noone else calls it that. there's a lot of weird stuff in here. blah.
2006-12-11	pull the wrapper for allocations of dma mem with a single segment in from	David Gwynne
	arc, which got it from mpi, which got it from ami. grange is right, we should look at pushing it back up into the bus_dma api somewhere.
2006-12-11	oops, too far for the match/attach funcs	David Gwynne

2006-12-11	give the function prototypes a bit more room for the return type.	David Gwynne

2006-12-11	per port register definitions	David Gwynne

2006-12-11	fix %b format string now that deraadt fixed printf	David Gwynne

2006-12-11	stash the field showing which ports are hooked up, and dump it if verbose	David Gwynne
	debug is on
2006-12-11	if ahci debug and verbose output is enabled, then dump the cap register.	David Gwynne
	this also fixes a few reg definition errors i found after having them dumped. something seems really screwy with %b. i cant select the 32nd bit position using \x20 or \040, so im using \32 and the rest are octal (\oNN). hex (\xNN) seems really really borked, and the compiler doesnt like eating some of the dec ones (eg, \8BITNAME).
2006-12-09	sigh, split the bus space mapping and interrupt hookup apart so i can	David Gwynne
	reset the controller and clear interrupts off it before doing the hookup.
2006-12-09	reset the hba and set the enable bit.	David Gwynne

2006-12-09	figure out which revision of ahci we're trying to use and print it out.	David Gwynne
	if we don't know about it, bomb out.
2006-12-09	split the mapping of the pci resources out of the main attach func	David Gwynne

2006-12-09	add wrappers for safe access to the register space. stolen from arc (which	David Gwynne
	stole them from mpi).
2006-12-09	add macros for debug shizz	David Gwynne

2006-12-09	bit definitions for the cap and ghc registers	David Gwynne

2006-12-09	registers for hba control	David Gwynne

2006-12-09	the start of a driver for ahci controllers. this does nothing but map the	David Gwynne
	register space and hook an interrupt up for the controller i have, but it is going into the tree so i can work on it. commit early, commit often