75e303a758
o Separate TX/RX buffer DMA tag from TX/RX descriptor ring DMA tag. o Separate RX buffer DMA tag from common buffer DMA tag. RX DMA tag has different restriction compared to TX DMA tag. o Add 40bit DMA address support. o Adjust TX/RX descriptor ring alignment to 64 bytes from 256 bytes as documented in datasheet. o Added check to ensure TX/RX ring reside within a 4GB boundary. Since TX/RX ring shares the same high address register they should have the same high address. o TX/RX side bus_dmamap_load_mbuf_sg(9) support. o Add lock assertion to vge_setmulti(). o Add RX spare DMA map to recover from DMA map load failure. o Add optimized RX buffer handler, vge_discard_rxbuf which is activated when vge(4) sees bad frames. o Don't blindly update VGE_RXDESC_RESIDUECNT register. Datasheet says the register should be updated only when number of available RX descriptors are multiple of 4. o Use __NO_STRICT_ALIGNMENT instead of defining VGE_FIXUP_RX which is only set for i386 architecture. Previously vge(4) also performed expensive copy operation to align IP header on amd64. This change should give RX performance boost on amd64 architecture. o Don't reinitialize controller if driver is already running. This should reduce number of link state flipping. o Since vge(4) drops a driver lock before passing received frame to upper layer, make sure vge(4) is still running after re-acquiring driver lock. o Add second argument count to vge_rxeof(). The argument will limit number of packets could be processed in RX handler. o Rearrange vge_rxeof() not to allocate RX buffer if received frame was bad packet. o Removed if_printf that prints DMA map failure. This type of message shouldn't be used in fast path of driver. o Reduce number of allowed TX buffer fragments to 6 from 7. A TX descriptor allows 7 fragments of a frame. However the CMZ field of descriptor has just 3bits and the controller wants to see fragment + 1 in the field. So if we have 7 fragments the field value would be 0 which seems to cause unexpected results under certain conditions. This change should fix occasional TX hang observed on vge(4). o Simplify vge_stat_locked() and add number of available TX descriptor check. o vge(4) controllers lack padding short frames. Make sure to fill zero for the padded bytes. This closes unintended information disclosure. o Don't set VGE_TDCTL_JUMBO flag. Datasheet is not clear whether this bit should be set by driver or write-back status bit after transmission. At least vendor's driver does not set this bit so remove it. Without this bit vge(4) still can send jumbo frames. o Don't start driver when vge(4) know there are not enough RX buffers. o Remove volatile keyword in RX descriptor structure. This should be handled by bus_dma(9). o Collapse two 16bits member of TX/RX descriptor into single 32bits member. o Reduce number of RX descriptors to 252 from 256. The VGE_RXDESCNUM is 16bits register but only lower 8bits are valid. So the maximum number of RX descriptors would be 255. However the number of should be multiple of 4 as controller wants to update 4 RX descriptors at a time. This limits the maximum number of RX descriptor to be 252. Tested by: Dewayne Geraghty (dewayne.geraghty <> heuristicsystems dot com dot au) Carey Jones (m.carey.jones <> gmail dot com) Yoshiaki Kasahara (kasahara <> nc dor kyushu-u dot ac dotjp) |
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| .. | ||
| if_vge.c | ||
| if_vgereg.h | ||
| if_vgevar.h | ||