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authorRobert Jennings <rcj@linux.vnet.ibm.com>2008-07-24 04:34:52 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-25 15:44:44 +1000
commit1096d63d8e7d226630706e15648705d0187787e4 (patch)
tree0233951b529ee7b537d527e6d57c8e5d80d48ae7 /drivers/scsi/ibmvscsi
parentea866e6526b8a2ead92875732d41b26fdb470312 (diff)
ibmveth: enable driver for CMO
Enable ibmveth for Cooperative Memory Overcommitment (CMO). For this driver it means calculating a desired amount of IO memory based on the current MTU and updating this value with the bus when MTU changes occur. Because DMA mappings can fail, we have added a bounce buffer for temporary cases where the driver can not map IO memory for the buffer pool. The following changes are made to enable the driver for CMO: * DMA mapping errors will not result in error messages if entitlement has been exceeded and resources were not available. * DMA mapping errors are handled gracefully, ibmveth_replenish_buffer_pool() is corrected to check the return from dma_map_single and fail gracefully. * The driver will have a get_desired_dma function defined to function in a CMO environment. * When the MTU is changed, the driver will update the device IO entitlement Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com> Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Santiago Leon <santil@us.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/scsi/ibmvscsi')
0 files changed, 0 insertions, 0 deletions