d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

BCM5719 cannot handle DMA requests for DMA segments that have

Browse Source 
larger than 4KB in size.  However the maximum DMA segment size
created in DMA tag is 4KB, so we wouldn't encounter the issue here.
Just record this issue such that let developers not to create a DMA
segment that is larger than 4KB for BCM5719. It's possible to split
a DMA segment into multiple smaller ones in run time but I believe
it's not worth to implement that.
This commit is contained in:
Pyun YongHyeon 2011-10-26 18:37:02 +00:00
parent d9820cd85e
commit a7fcfcf3ba
2 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/dev/bge/if_bge.c
View File

@ -2927,6 +2927,15 @@ bge_attach(device_t dev)
if (BGE_IS_5755_PLUS(sc) || sc->bge_asicrev == BGE_ASICREV_BCM5906)
sc->bge_flags |= BGE_FLAG_SHORT_DMA_BUG;
/*
* BCM5719 cannot handle DMA requests for DMA segments that
* have larger than 4KB in size. However the maximum DMA
* segment size created in DMA tag is 4KB for TSO, so we
* wouldn't encounter the issue here.
*/
if (sc->bge_asicrev == BGE_ASICREV_BCM5719)
sc->bge_flags |= BGE_FLAG_4K_RDMA_BUG;
misccfg = CSR_READ_4(sc, BGE_MISC_CFG) & BGE_MISCCFG_BOARD_ID;
if (sc->bge_asicrev == BGE_ASICREV_BCM5705) {
if (misccfg == BGE_MISCCFG_BOARD_ID_5788 ||

1
sys/dev/bge/if_bgereg.h
View File

@ -2797,6 +2797,7 @@ struct bge_softc {
#define BGE_FLAG_4G_BNDRY_BUG 0x02000000
#define BGE_FLAG_RX_ALIGNBUG 0x04000000
#define BGE_FLAG_SHORT_DMA_BUG 0x08000000
#define BGE_FLAG_4K_RDMA_BUG 0x10000000
uint32_t bge_phy_flags;
#define BGE_PHY_NO_WIRESPEED 0x00000001
#define BGE_PHY_ADC_BUG 0x00000002