I2O_PCI_ALLOC(9) Message-based devices I2O_PCI_ALLOC(9)NAME
i2o_pci_alloc - Allocate DMA memory, map IO memory for I2O controller
int i2o_pci_alloc(struct i2o_controller * c);
Allocate DMA memory for a PCI (or in theory AGP) I2O controller. All IO mappings are also done here. If MTRR is enabled, also do add memory
Returns 0 on success or negative error code on failure.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 I2O_PCI_ALLOC(9)
Check Out this Related Man Page
STPCIDE(4) BSD Kernel Interfaces Manual STPCIDE(4)NAME
stpcide -- STMicroelectronics STPC IDE disk controllers driver
stpcide* at pci? dev ? function ? flags 0x0000
The stpcide driver supports the STMicroelectronics STPC x86 SoC internal IDE controllers, and provides the interface with the hardware for
the ata(4) driver. The driver features DMA mode 2 and PIO mode 4 transfer speeds.
The 0x0002 flag forces the stpcide driver to disable DMA on chipsets for which DMA would normally be enabled. This can be used as a debug-
ging aid, or to work around problems where the IDE controller is wired up to the system incorrectly.
SEE ALSO ata(4), atapi(4), intro(4), pci(4), pciide(4), wd(4), wdc(4)BUGS
The timings used for the DMA and PIO modes are for STPC Atlas and its siblings with their PCI clock configured at 33 MHz. Other speeds
including the STPC Vega Ultra-IDE controller will need adjustments.
BSD October 31, 2003 BSD
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