diff options
| author | Yinjun Zhang <yinjun.zhang@corigine.com> | 2022-06-13 12:58:31 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-06-13 15:31:39 +0300 |
| commit | 5f30671d8dc6b7a489435ce8c40a2036e3c16d04 (patch) | |
| tree | 60269c71c82c89e66bf94799343e8fcdfa4b1b24 /drivers/net/ethernet/netronome/nfp/nfp_net.h | |
| parent | 11a1585f26f7adcc800bd392fe7c29806f88dbbf (diff) | |
| download | linux-5f30671d8dc6b7a489435ce8c40a2036e3c16d04.tar.xz | |
nfp: support 48-bit DMA addressing for NFP3800
48-bit DMA addressing is supported in NFP3800 HW and implemented
in NFDK firmware, so enable this feature in driver now. Note that
with this change, NFD3 firmware, which doesn't implement 48-bit
DMA, cannot be used for NFP3800 any more.
RX free list descriptor, used by both NFD3 and NFDK, is also modified
to support 48-bit DMA. That's OK because the top bits is always get
set to 0 when assigned with 40-bit address.
Based on initial work of Jakub Kicinski <jakub.kicinski@netronome.com>.
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/nfp_net.h')
| -rw-r--r-- | drivers/net/ethernet/netronome/nfp/nfp_net.h | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h index 3dd3a92d2e7f..b07cea8e354c 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net.h +++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h @@ -115,7 +115,7 @@ struct nfp_nfdk_tx_buf; #define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1)) /* Convenience macro for writing dma address into RX/TX descriptors */ -#define nfp_desc_set_dma_addr(desc, dma_addr) \ +#define nfp_desc_set_dma_addr_40b(desc, dma_addr) \ do { \ __typeof__(desc) __d = (desc); \ dma_addr_t __addr = (dma_addr); \ @@ -124,13 +124,13 @@ struct nfp_nfdk_tx_buf; __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ } while (0) -#define nfp_nfdk_tx_desc_set_dma_addr(desc, dma_addr) \ - do { \ - __typeof__(desc) __d = (desc); \ - dma_addr_t __addr = (dma_addr); \ - \ - __d->dma_addr_hi = cpu_to_le16(upper_32_bits(__addr) & 0xff); \ - __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ +#define nfp_desc_set_dma_addr_48b(desc, dma_addr) \ + do { \ + __typeof__(desc) __d = (desc); \ + dma_addr_t __addr = (dma_addr); \ + \ + __d->dma_addr_hi = cpu_to_le16(upper_32_bits(__addr)); \ + __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ } while (0) /** @@ -225,8 +225,8 @@ struct nfp_net_tx_ring { struct nfp_net_rx_desc { union { struct { - u8 dma_addr_hi; /* High bits of the buf address */ - __le16 reserved; /* Must be zero */ + __le16 dma_addr_hi; /* High bits of the buf address */ + u8 reserved; /* Must be zero */ u8 meta_len_dd; /* Must be zero */ __le32 dma_addr_lo; /* Low bits of the buffer address */ |