linux-kernel - [PATCH v1 05/12] gna: initialize mmu

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Date:   Tue, 16 Feb 2021 17:05:18 +0100
From:   Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Jonathan Corbet <corbet@....net>,
        Derek Kiernan <derek.kiernan@...inx.com>,
        Dragan Cvetic <dragan.cvetic@...inx.com>
Cc:     linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>,
        Tomasz Jankowski <tomasz1.jankowski@...el.com>,
        Savo Novakovic <savox.novakovic@...el.com>
Subject: [PATCH v1 05/12] gna: initialize mmu

From: Tomasz Jankowski <tomasz1.jankowski@...el.com>

Setup mmu in the driver with a new memory component.

Signed-off-by: Tomasz Jankowski <tomasz1.jankowski@...el.com>
Tested-by: Savo Novakovic <savox.novakovic@...el.com>
Signed-off-by: Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>
---
 drivers/misc/gna/gna_device.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/misc/gna/gna_device.c b/drivers/misc/gna/gna_device.c
index f962c7e1e5e9..d6a6d3cab570 100644
--- a/drivers/misc/gna/gna_device.c
+++ b/drivers/misc/gna/gna_device.c
@@ -23,6 +23,16 @@ static int gna_dev_init(struct gna_private *gna_priv, struct pci_dev *pcidev,
 	bld_reg = gna_reg_read(gna_priv->bar0.mem_addr, GNA_MMIO_IBUFFS);
 	gna_priv->hw_info.in_buf_s = bld_reg & GENMASK(7, 0);
 
+	if (gna_mmu_alloc(gna_priv)) {
+		dev_err(&gna_priv->dev, "gna mmu allocation failed\n");
+		return -EFAULT;
+	}
+	dev_dbg(&pcidev->dev, "maximum memory size %llu num pd %d\n",
+		gna_priv->info.max_hw_mem, gna_priv->info.num_pagetables);
+	dev_dbg(&pcidev->dev, "desc rsvd size %d mmu vamax size %d\n",
+		gna_priv->info.desc_info.rsvd_size,
+		gna_priv->info.desc_info.mmu_info.vamax_size);
+
 	mutex_init(&gna_priv->mmu_lock);
 
 	idr_init(&gna_priv->memory_idr);
@@ -35,6 +45,7 @@ static int gna_dev_init(struct gna_private *gna_priv, struct pci_dev *pcidev,
 static void gna_dev_deinit(struct gna_private *gna_priv)
 {
 	idr_destroy(&gna_priv->memory_idr);
+	gna_mmu_free(gna_priv);
 	pci_set_drvdata(gna_priv->pdev, NULL);
 }
 
-- 
2.28.0