netdev - [PATCH 6/7] octeontx2-af: Enable PCI master

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Date:   Mon,  2 Mar 2020 12:49:27 +0530
From:   sunil.kovvuri@...il.com
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, Sunil Goutham <sgoutham@...vell.com>
Subject: [PATCH 6/7] octeontx2-af: Enable PCI master

From: Sunil Goutham <sgoutham@...vell.com>

Bus mastering is enabled by firmware, but when this driver
is unbinded bus mastering gets disabled by the PCI subsystem
which results interrupts not working when driver is reloaded.
Hence set bus mastering everytime in probe().

Also
- Converted pci_set_dma_mask() and pci_set_consistent_dma_mask()
  to dma_set_mask_and_coherent().
- Cleared transaction pending bit which gets set during
  driver unbind due to clearing of bus mastering (ME bit).

Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
---
 drivers/net/ethernet/marvell/octeontx2/af/rvu.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
index e851477..3b794df 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.c
@@ -2243,6 +2243,9 @@ static int rvu_register_interrupts(struct rvu *rvu)
 	}
 	rvu->irq_allocated[RVU_AF_INT_VEC_PFME] = true;
 
+	/* Clear TRPEND bit for all PF */
+	rvu_write64(rvu, BLKADDR_RVUM,
+		    RVU_AF_PFTRPEND, INTR_MASK(rvu->hw->total_pfs));
 	/* Enable ME interrupt for all PFs*/
 	rvu_write64(rvu, BLKADDR_RVUM,
 		    RVU_AF_PFME_INT, INTR_MASK(rvu->hw->total_pfs));
@@ -2554,17 +2557,13 @@ static int rvu_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto err_disable_device;
 	}
 
-	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(48));
+	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48));
 	if (err) {
-		dev_err(dev, "Unable to set DMA mask\n");
+		dev_err(dev, "DMA mask config failed, abort\n");
 		goto err_release_regions;
 	}
 
-	err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(48));
-	if (err) {
-		dev_err(dev, "Unable to set consistent DMA mask\n");
-		goto err_release_regions;
-	}
+	pci_set_master(pdev);
 
 	/* Map Admin function CSRs */
 	rvu->afreg_base = pcim_iomap(pdev, PCI_AF_REG_BAR_NUM, 0);
-- 
2.7.4