X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/14353aa8f494621e510528b7be0e0f4ff82fdefb..5eebf7385fedb1517b66b53c28e5aa6bb0a2be50:/iokit/Kernel/IOInterruptController.cpp?ds=inline diff --git a/iokit/Kernel/IOInterruptController.cpp b/iokit/Kernel/IOInterruptController.cpp index bd3baa04d..438d93d87 100644 --- a/iokit/Kernel/IOInterruptController.cpp +++ b/iokit/Kernel/IOInterruptController.cpp @@ -96,10 +96,10 @@ IOReturn IOInterruptController::registerInterrupt(IOService *nub, int source, originalNub = vector->nub; originalSource = vector->source; - // Save the dis/enable state for the original consumer's interrupt. - // Then disable the source - wasDisabledSoft = vector->interruptDisabledSoft; - disableInterrupt(originalNub, originalSource); + // Physically disable the interrupt, but mark it as being enables in the hardware. + // The interruptDisabledSoft now indicates the driver's request for enablement. + disableVectorHard(vectorNumber, vector); + vector->interruptDisabledHard = 0; // Initialize the new shared interrupt controller. error = vector->sharedController->initInterruptController(this, @@ -125,7 +125,17 @@ IOReturn IOInterruptController::registerInterrupt(IOService *nub, int source, // put the original consumor's interrupt back to normal and // get rid of whats left of the shared controller. if (error != kIOReturnSuccess) { + // Save the driver's interrupt enablement state. + wasDisabledSoft = vector->interruptDisabledSoft; + + // Make the interrupt really hard disabled. + vector->interruptDisabledSoft = 1; + vector->interruptDisabledHard = 1; + + // Enable the original consumer's interrupt if needed. + if (!wasDisabledSoft) originalNub->enableInterrupt(originalSource); enableInterrupt(originalNub, originalSource); + vector->sharedController->release(); vector->sharedController = 0; IOUnlock(vector->interruptLock); @@ -139,6 +149,13 @@ IOReturn IOInterruptController::registerInterrupt(IOService *nub, int source, vector->target = vector->sharedController; vector->refCon = 0; + // Save the driver's interrupt enablement state. + wasDisabledSoft = vector->interruptDisabledSoft; + + // Make the interrupt really hard disabled. + vector->interruptDisabledSoft = 1; + vector->interruptDisabledHard = 1; + // Enable the original consumer's interrupt if needed. if (!wasDisabledSoft) originalNub->enableInterrupt(originalSource); } @@ -399,7 +416,7 @@ IOReturn IOSharedInterruptController::initInterruptController(IOInterruptControl } // Allocate the memory for the vectors - numVectors = 8; // For now a constant number. + numVectors = 32; // For now a constant number. vectors = (IOInterruptVector *)IOMalloc(numVectors * sizeof(IOInterruptVector)); if (vectors == NULL) { IOFree(_interruptSources, sizeof(IOInterruptSource));