Commit eee549e1 authored by Raghava Aditya Renukunta's avatar Raghava Aditya Renukunta Committed by Martin K. Petersen
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scsi: aacraid: Auto detect INTx or MSIx mode during sync cmd processing 



During sync command processing, if legacy INTx status indicates command
is not completed, sample the MSIx register and check if it indicates
command completion, set controller MSIx enabled flag.

Signed-off-by: default avatarPrasad B Munirathnam <prasad.munirathnam@microsemi.com>
Signed-off-by: default avatarRaghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: default avatarDave Carroll <david.carroll@microsemi.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent a5799d74

drivers/scsi/aacraid/aacraid.h

+1 −0
Original line number Diff line number Diff line
@@ -1231,6 +1231,7 @@ struct src_registers { 


#define SRC_ODR_SHIFT		12

#define SRC_IDR_SHIFT		9

#define SRC_MSI_READ_MASK	0x1000



typedef void (*fib_callback)(void *ctxt, struct fib *fibctx);

drivers/scsi/aacraid/src.c

+16 −6
Original line number Diff line number Diff line
@@ -1405,13 +1405,23 @@ void aac_src_access_devreg(struct aac_dev *dev, int mode) 


static int aac_src_get_sync_status(struct aac_dev *dev)

{

	int msix_val = 0;

	int legacy_val = 0;



	int val;

	msix_val = src_readl(dev, MUnit.ODR_MSI) & SRC_MSI_READ_MASK ? 1 : 0;



	if (dev->msi_enabled)

		val = src_readl(dev, MUnit.ODR_MSI) & 0x1000 ? 1 : 0;

	else

		val = src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT;

	if (!dev->msi_enabled) {

		/*

		 * if Legacy int status indicates cmd is not complete

		 * sample MSIx register to see if it indiactes cmd complete,

		 * if yes set the controller in MSIx mode and consider cmd

		 * completed

		 */

		legacy_val = src_readl(dev, MUnit.ODR_R) >> SRC_ODR_SHIFT;

		if (!(legacy_val & 1) && msix_val)

			dev->msi_enabled = 1;

		return legacy_val;

	}



	return val;

	return msix_val;

}

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