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Create controller-level DMA tag, handling range of supported addresses.

Browse source 
That simplifies logic for channels and gives the bus information about what
device actually allocated the tag.

Submitted by:	jhb@
This commit is contained in:
Alexander Motin 2013-04-10 20:38:15 +00:00
parent 29dde48df4
commit 234aa0297c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=249346
2 changed files with 28 additions and 8 deletions
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34
sys/dev/ahci/ahci.c
View file

@ -452,9 +452,23 @@ ahci_attach(device_t dev)
if ((ctlr->caps & AHCI_CAP_CCCS) == 0)
ctlr->ccc = 0;
ctlr->emloc = ATA_INL(ctlr->r_mem, AHCI_EM_LOC);
/* Create controller-wide DMA tag. */
if (bus_dma_tag_create(bus_get_dma_tag(dev), 0, 0,
(ctlr->caps & AHCI_CAP_64BIT) ? BUS_SPACE_MAXADDR :
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
BUS_SPACE_MAXSIZE, BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE,
0, NULL, NULL, &ctlr->dma_tag)) {
bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid,
ctlr->r_mem);
rman_fini(&ctlr->sc_iomem);
return ENXIO;
}
ahci_ctlr_setup(dev);
/* Setup interrupts. */
if (ahci_setup_interrupt(dev)) {
bus_dma_tag_destroy(ctlr->dma_tag);
bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);
rman_fini(&ctlr->sc_iomem);
return ENXIO;
@ -544,6 +558,7 @@ ahci_detach(device_t dev)
}
}
pci_release_msi(dev);
bus_dma_tag_destroy(ctlr->dma_tag);
/* Free memory. */
rman_fini(&ctlr->sc_iomem);
if (ctlr->r_mem)
@ -876,6 +891,14 @@ ahci_child_location_str(device_t dev, device_t child, char *buf,
return (0);
}
static bus_dma_tag_t
ahci_get_dma_tag(device_t dev, device_t child)
{
struct ahci_controller *ctlr = device_get_softc(dev);
return (ctlr->dma_tag);
}
devclass_t ahci_devclass;
static device_method_t ahci_methods[] = {
DEVMETHOD(device_probe, ahci_probe),
@ -889,6 +912,7 @@ static device_method_t ahci_methods[] = {
DEVMETHOD(bus_setup_intr, ahci_setup_intr),
DEVMETHOD(bus_teardown_intr,ahci_teardown_intr),
DEVMETHOD(bus_child_location_str, ahci_child_location_str),
DEVMETHOD(bus_get_dma_tag, ahci_get_dma_tag),
{ 0, 0 }
};
static driver_t ahci_driver = {
@ -1198,13 +1222,9 @@ ahci_dmainit(device_t dev)
struct ahci_dc_cb_args dcba;
size_t rfsize;
if (ch->caps & AHCI_CAP_64BIT)
ch->dma.max_address = BUS_SPACE_MAXADDR;
else
ch->dma.max_address = BUS_SPACE_MAXADDR_32BIT;
/* Command area. */
if (bus_dma_tag_create(bus_get_dma_tag(dev), 1024, 0,
ch->dma.max_address, BUS_SPACE_MAXADDR,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
NULL, NULL, AHCI_WORK_SIZE, 1, AHCI_WORK_SIZE,
0, NULL, NULL, &ch->dma.work_tag))
goto error;
@ -1223,7 +1243,7 @@ ahci_dmainit(device_t dev)
else
rfsize = 256;
if (bus_dma_tag_create(bus_get_dma_tag(dev), rfsize, 0,
ch->dma.max_address, BUS_SPACE_MAXADDR,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
NULL, NULL, rfsize, 1, rfsize,
0, NULL, NULL, &ch->dma.rfis_tag))
goto error;
@ -1238,7 +1258,7 @@ ahci_dmainit(device_t dev)
ch->dma.rfis_bus = dcba.maddr;
/* Data area. */
if (bus_dma_tag_create(bus_get_dma_tag(dev), 2, 0,
ch->dma.max_address, BUS_SPACE_MAXADDR,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR,
NULL, NULL,
AHCI_SG_ENTRIES * PAGE_SIZE * ch->numslots,
AHCI_SG_ENTRIES, AHCI_PRD_MAX,

2
sys/dev/ahci/ahci.h
View file

@ -348,7 +348,6 @@ struct ata_dma {
uint8_t *rfis; /* FIS receive area */
bus_addr_t rfis_bus; /* bus address of rfis */
bus_dma_tag_t data_tag; /* data DMA tag */
u_int64_t max_address; /* highest DMA'able address */
};
enum ahci_slot_states {
@ -453,6 +452,7 @@ struct ahci_enclosure {
/* structure describing a AHCI controller */
struct ahci_controller {
device_t dev;
bus_dma_tag_t dma_tag;
int r_rid;
struct resource *r_mem;
struct rman sc_iomem;