Intel 80310 I/O Processor Chipset AAU Coding Techniques

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562 spin_unlock_irqrestore(&aau->hold_lock, flags);563 }564565 return 0;566 }567568 /*=======================================================================*/569 /* Procedure: aau_free() */570 /* */571 /* Description: This function frees the AAU from usage. */572 /* */573 /* Parameters: aau -- AAU device context */574 /* */575 /* Returns: int: success -- OK */576 /* */577 /* Notes/Assumptions: */578 /* */579 /* History: Dave Jiang 07/19/01 Initial Creation */580 /*=======================================================================*/581 void aau_free(u32 aau_context)582 {583 iop310_aau_t *aau = (iop310_aau_t *) aau_context;584585 atomic_dec(&aau->ref_count);586587 /* if ref count is 1 or less, you are the last owner */588 if(atomic_read(&aau->ref_count) last_aau)
Intel ® 80310 I/O Processor Chipset AAU Coding TechniquesAAU Source Code596 {597 aau->last_aau = NULL;598 }599600 DPRINTK("Freeing IRQ %d\n", aau->irq);601 /* free the IRQ */602 free_irq(aau->irq, (void *)aau);603 }604605 DPRINTK("freed\n");606 }607608 /*=======================================================================*/609 /* Procedure: aau_irq_handler() */610 /* */611 /* Description: This function is the int handler for the AAU */612 /* driver. It removes the done AAU descriptors from the */613 /* process queue and put them on the holding Q. it */614 /* continues to process until process queue empty or */615 /* the current AAU desc on the accelerator is the one */616 /* we are inspecting */617 /* */618 /* Parameters: irq: IRQ activated */619 /* dev_id: device */620 /* regs: registers */621 /* */622 /* Returns: NONE */623 /* */624 /* Notes/Assumptions: Interrupt is masked */625 /* */626 /* History: Dave Jiang 07/19/01 Initial Creation */627 /* Dave Jiang 07/20/01 Check FIQ1 instead of ASR for INTs */628 /*=======================================================================*/629 static void aau_irq_handler(int irq, void *dev_id, struct pt_regs *regs)White Paper 51
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Intel 80310 I/O Processor Chipset AAU Coding Techniques

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