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tilelink: more detailed fragmenter requirements

This commit is contained in:
Henry Cook 2018-09-30 01:19:55 -07:00
parent 1121226259
commit 001572ca74
1 changed files with 8 additions and 8 deletions
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16
src/main/scala/tilelink/Fragmenter.scala
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@ -34,9 +34,9 @@ class TLFragmenter(val minSize: Int, val maxSize: Int, val alwaysMin: Boolean =
val toggleBits = 1
val addedBits = fragmentBits + toggleBits + fullBits
def expandTransfer(x: TransferSizes) = if (!x) x else {
def expandTransfer(x: TransferSizes, op: String) = if (!x) x else {
// validate that we can apply the fragmenter correctly
require (x.max >= minSize, s"max transfer size (${x.max}) must be >= min transfer size (${minSize})")
require (x.max >= minSize, s"TLFragmenter (with parent $parent) max transfer size $op(${x.max}) must be >= min transfer size (${minSize})")
TransferSizes(x.min, maxSize)
}
def shrinkTransfer(x: TransferSizes) =
@ -46,10 +46,10 @@ class TLFragmenter(val minSize: Int, val maxSize: Int, val alwaysMin: Boolean =
def mapManager(m: TLManagerParameters) = m.copy(
supportsArithmetic = shrinkTransfer(m.supportsArithmetic),
supportsLogical = shrinkTransfer(m.supportsLogical),
supportsGet = expandTransfer(m.supportsGet),
supportsPutFull = expandTransfer(m.supportsPutFull),
supportsPutPartial = expandTransfer(m.supportsPutPartial),
supportsHint = expandTransfer(m.supportsHint))
supportsGet = expandTransfer(m.supportsGet, "Get"),
supportsPutFull = expandTransfer(m.supportsPutFull, "PutFull"),
supportsPutPartial = expandTransfer(m.supportsPutPartial, "PutParital"),
supportsHint = expandTransfer(m.supportsHint, "Hint"))
val node = TLAdapterNode(
// We require that all the responses are mutually FIFO
@ -70,11 +70,11 @@ class TLFragmenter(val minSize: Int, val maxSize: Int, val alwaysMin: Boolean =
require (fifoId.isDefined && managers.map(_.fifoId == fifoId).reduce(_ && _))
require (!manager.anySupportAcquireB)
require (minSize >= beatBytes, s"We don't support fragmenting ($minSize) to sub-beat ($beatBytes) accesses")
require (minSize >= beatBytes, s"TLFragmenter (with parent $parent) can't support fragmenting ($minSize) to sub-beat ($beatBytes) accesses")
// We can't support devices which are cached on both sides of us
require (!edgeOut.manager.anySupportAcquireB || !edgeIn.client.anySupportProbe)
// We can't support denied because we reassemble fragments
require (!edgeOut.manager.mayDenyGet || holdFirstDeny)
require (!edgeOut.manager.mayDenyGet || holdFirstDeny, s"TLFragmenter (with parent $parent) can't support denials without holdFirstDeny=true")
require (!edgeOut.manager.mayDenyPut || earlyAck == EarlyAck.None)
/* The Fragmenter is a bit tricky, because there are 5 sizes in play: