netdev - [PATCH net-next 1/6] fsl/fman: don't touch liodn base regs reserved on non-PAMU SoCs

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Message-ID: <1571660862-18313-2-git-send-email-madalin.bucur@nxp.com>
Date:   Mon, 21 Oct 2019 12:27:54 +0000
From:   Madalin-cristian Bucur <madalin.bucur@....com>
To:     "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     Roy Pledge <roy.pledge@....com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Madalin-cristian Bucur <madalin.bucur@....com>
Subject: [PATCH net-next 1/6] fsl/fman: don't touch liodn base regs reserved
 on non-PAMU SoCs

From: Laurentiu Tudor <laurentiu.tudor@....com>

The liodn base registers are specific to PAMU based NXP systems and are
reserved on SMMU based ones. Don't access them unless PAMU is compiled in.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@....com>
Signed-off-by: Madalin Bucur <madalin.bucur@....com>
---
 drivers/net/ethernet/freescale/fman/fman.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/fman/fman.c b/drivers/net/ethernet/freescale/fman/fman.c
index 210749bf1eac..934111def0be 100644
--- a/drivers/net/ethernet/freescale/fman/fman.c
+++ b/drivers/net/ethernet/freescale/fman/fman.c
@@ -634,6 +634,9 @@ static void set_port_liodn(struct fman *fman, u8 port_id,
 {
 	u32 tmp;
 
+	iowrite32be(liodn_ofst, &fman->bmi_regs->fmbm_spliodn[port_id - 1]);
+	if (!IS_ENABLED(CONFIG_FSL_PAMU))
+		return;
 	/* set LIODN base for this port */
 	tmp = ioread32be(&fman->dma_regs->fmdmplr[port_id / 2]);
 	if (port_id % 2) {
@@ -644,7 +647,6 @@ static void set_port_liodn(struct fman *fman, u8 port_id,
 		tmp |= liodn_base << DMA_LIODN_SHIFT;
 	}
 	iowrite32be(tmp, &fman->dma_regs->fmdmplr[port_id / 2]);
-	iowrite32be(liodn_ofst, &fman->bmi_regs->fmbm_spliodn[port_id - 1]);
 }
 
 static void enable_rams_ecc(struct fman_fpm_regs __iomem *fpm_rg)
@@ -1942,6 +1944,8 @@ static int fman_init(struct fman *fman)
 
 		fman->liodn_offset[i] =
 			ioread32be(&fman->bmi_regs->fmbm_spliodn[i - 1]);
+		if (!IS_ENABLED(CONFIG_FSL_PAMU))
+			continue;
 		liodn_base = ioread32be(&fman->dma_regs->fmdmplr[i / 2]);
 		if (i % 2) {
 			/* FMDM_PLR LSB holds LIODN base for odd ports */
-- 
2.1.0