On Tue, Mar 21, 2017 at 9:27 AM, Stefan Roese sr@denx.de wrote:
From: Thomas Petazzoni thomas.petazzoni@free-electrons.com
This commit adjusts the allocation and freeing of BM pools to support PPv2.2. This involves:
Checking that the number of buffer pointers is a multiple of 16, as required by the hardware.
Adjusting the size of the DMA coherent area allocated for buffer pointers. Indeed, PPv2.2 needs space for 2 pointers of 64-bits per buffer, as opposed to 2 pointers of 32-bits per buffer in PPv2.1. The size in bytes is now stored in a new field of the mvpp2_bm_pool structure.
On PPv2.2, getting the physical and virtual address of each buffer requires reading the MVPP2_BM_ADDR_HIGH_ALLOC to get the high order bits of those addresses. A new utility function mvpp2_bm_bufs_get_addrs() is introduced to handle this.
On PPv2.2, releasing a buffer requires writing the high order 32 bits of the physical address to MVPP2_BM_PHY_VIRT_HIGH_RLS_REG. We no longer need to write the virtual address to MVPP2_BM_VIRT_RLS_REG.
Signed-off-by: Thomas Petazzoni thomas.petazzoni@free-electrons.com Signed-off-by: Stefan Roese sr@denx.de
Acked-by: Joe Hershberger joe.hershberger@ni.com