linux-kernel - [PATCH v3 03/14] intel_gna: read hardware info in the driver

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Message-Id: <20210513110040.2268-4-maciej.kwapulinski@linux.intel.com>
Date:   Thu, 13 May 2021 13:00:29 +0200
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>,
        Andy Shevchenko <andy.shevchenko@...il.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>,
        Jianxun Zhang <jianxun.zhang@...ux.intel.com>
Subject: [PATCH v3 03/14] intel_gna: read hardware info in the driver

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

Get the hardware information from register MMIO_IBUFFS

Signed-off-by: Tomasz Jankowski <tomasz1.jankowski@...el.com>
Tested-by: Savo Novakovic <savox.novakovic@...el.com>
Co-developed-by: Jianxun Zhang <jianxun.zhang@...ux.intel.com>
Signed-off-by: Jianxun Zhang <jianxun.zhang@...ux.intel.com>
Co-developed-by: Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>
Signed-off-by: Maciej Kwapulinski <maciej.kwapulinski@...ux.intel.com>
---
 drivers/misc/intel/gna/device.c | 4 ++++
 drivers/misc/intel/gna/device.h | 1 +
 drivers/misc/intel/gna/hw.h     | 4 ++++
 3 files changed, 9 insertions(+)

diff --git a/drivers/misc/intel/gna/device.c b/drivers/misc/intel/gna/device.c
index 8722935d26bf..45b4b6df64ef 100644
--- a/drivers/misc/intel/gna/device.c
+++ b/drivers/misc/intel/gna/device.c
@@ -21,6 +21,7 @@ int gna_probe(struct device *parent, struct gna_dev_info *dev_info, void __iomem
 	static atomic_t dev_last_idx = ATOMIC_INIT(-1);
 	struct gna_private *gna_priv;
 	const char *dev_misc_name;
+	u32 bld_reg;
 	int ret;
 
 	gna_priv = devm_kzalloc(parent, sizeof(*gna_priv), GFP_KERNEL);
@@ -48,6 +49,9 @@ int gna_probe(struct device *parent, struct gna_dev_info *dev_info, void __iomem
 		}
 	}
 
+	bld_reg = gna_reg_read(gna_priv, GNA_MMIO_IBUFFS);
+	gna_priv->hw_info.in_buf_s = bld_reg & GENMASK(7, 0);
+
 	return 0;
 }
 
diff --git a/drivers/misc/intel/gna/device.h b/drivers/misc/intel/gna/device.h
index a188f482a273..057dec0e1983 100644
--- a/drivers/misc/intel/gna/device.h
+++ b/drivers/misc/intel/gna/device.h
@@ -24,6 +24,7 @@ struct gna_private {
 	/* device related resources */
 	void __iomem *iobase;
 	struct gna_dev_info info;
+	struct gna_hw_info hw_info;
 };
 
 int gna_probe(struct device *parent, struct gna_dev_info *dev_info, void __iomem *iobase);
diff --git a/drivers/misc/intel/gna/hw.h b/drivers/misc/intel/gna/hw.h
index f9c0566cbe60..f61792f9dd52 100644
--- a/drivers/misc/intel/gna/hw.h
+++ b/drivers/misc/intel/gna/hw.h
@@ -47,6 +47,10 @@ struct gna_desc_info {
 	struct gna_mmu_info mmu_info;
 };
 
+struct gna_hw_info {
+	u8 in_buf_s;
+};
+
 struct gna_dev_info {
 	u32 hwid;
 	u32 num_pagetables;
-- 
2.28.0