linux-kernel - [v5 02/12] soc/fsl/qbman: Use shared-dma-pool for BMan private memory allocations

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Date:   Mon, 18 Sep 2017 16:39:37 -0400
From:   Roy Pledge <roy.pledge@....com>
To:     <leoyang.li@....com>, <linuxppc-dev@...ts.ozlabs.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
CC:     <oss@...error.net>, <madalin.bucur@....com>,
        <catalin.marinas@....com>, <linux@...linux.org.uk>,
        <arnd@...db.de>, <mark.rutland@....com>,
        Roy Pledge <roy.pledge@....com>
Subject: [v5 02/12] soc/fsl/qbman: Use shared-dma-pool for BMan private memory allocations

Use the shared-memory-pool mechanism for free buffer proxy record
area allocation.

Signed-off-by: Roy Pledge <roy.pledge@....com>
---
 drivers/soc/fsl/qbman/bman_ccsr.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/soc/fsl/qbman/bman_ccsr.c b/drivers/soc/fsl/qbman/bman_ccsr.c
index eaa9585..05c4223 100644
--- a/drivers/soc/fsl/qbman/bman_ccsr.c
+++ b/drivers/soc/fsl/qbman/bman_ccsr.c
@@ -201,6 +201,21 @@ static int fsl_bman_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	/*
+	 * If FBPR memory wasn't defined using the qbman compatible string
+	 * try using the of_reserved_mem_device method
+	 */
+	if (!fbpr_a) {
+		ret = qbman_init_private_mem(dev, 0, &fbpr_a, &fbpr_sz);
+		if (ret) {
+			dev_err(dev, "qbman_init_private_mem() failed 0x%x\n",
+				ret);
+			return -ENODEV;
+		}
+	}
+
+	dev_dbg(dev, "Allocated FBPR 0x%llx 0x%zx\n", fbpr_a, fbpr_sz);
+
 	bm_set_memory(fbpr_a, fbpr_sz);
 
 	err_irq = platform_get_irq(pdev, 0);
-- 
2.7.4