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author | mav <mav@FreeBSD.org> | 2013-04-10 20:38:15 +0000 |
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committer | mav <mav@FreeBSD.org> | 2013-04-10 20:38:15 +0000 |
commit | 695c50ff24460c5a7a186dd0adf77c976f32ec06 (patch) | |
tree | 53680c0721b6be0a80a9e8cf5458b4ecfab98648 /sys/dev/ahci | |
parent | 21122c283428cb5befbc9946b8191cc085c8d996 (diff) | |
download | FreeBSD-src-695c50ff24460c5a7a186dd0adf77c976f32ec06.zip FreeBSD-src-695c50ff24460c5a7a186dd0adf77c976f32ec06.tar.gz |
Create controller-level DMA tag, handling range of supported addresses.
That simplifies logic for channels and gives the bus information about what
device actually allocated the tag.
Submitted by: jhb@
Diffstat (limited to 'sys/dev/ahci')
-rw-r--r-- | sys/dev/ahci/ahci.c | 34 | ||||
-rw-r--r-- | sys/dev/ahci/ahci.h | 2 |
2 files changed, 28 insertions, 8 deletions
diff --git a/sys/dev/ahci/ahci.c b/sys/dev/ahci/ahci.c index f7dba1e..6ec63ba 100644 --- a/sys/dev/ahci/ahci.c +++ b/sys/dev/ahci/ahci.c @@ -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, diff --git a/sys/dev/ahci/ahci.h b/sys/dev/ahci/ahci.h index 2eef321..c3bee40 100644 --- a/sys/dev/ahci/ahci.h +++ b/sys/dev/ahci/ahci.h @@ -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; |