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From: "Xu, Rosen" <rosen.xu@intel.com>
To: "Zhang, Tianfei" <tianfei.zhang@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
CC: "stable@dpdk.org" <stable@dpdk.org>
Thread-Topic: [PATCH v3 2/2] raw/ifpga/base: fix NIOS SPI initial
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Subject: Re: [dpdk-dev] [PATCH v3 2/2] raw/ifpga/base: fix NIOS SPI initial
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-----Original Message-----
From: Zhang, Tianfei <tianfei.zhang@intel.com>=20
Sent: Wednesday, July 15, 2020 5:35 AM
To: dev@dpdk.org; Xu, Rosen <rosen.xu@intel.com>
Cc: Zhang, Tianfei <tianfei.zhang@intel.com>; stable@dpdk.org
Subject: [PATCH v3 2/2] raw/ifpga/base: fix NIOS SPI initial

From: Tianfei Zhang <tianfei.zhang@intel.com>

Add fecmode setting on NIOS SPI primary initialization.
this SPI is shared by NIOS core inside FPGA, NIOS will use this SPI primary=
 to do some one-time initialization after power up, and then release the co=
ntrol to DPDK.

Fix the timeout initialization for polling the NIOS_INIT_DONE.

Fixes: bc44402f ("raw/ifpga/base: configure FEC mode")
Cc: stable@dpdk.org

Signed-off-by: Tianfei Zhang <tianfei.zhang@intel.com>

---
v3: resend the patch with threaded option for git send-email
v2: fix coding style issue
---
 drivers/raw/ifpga/base/ifpga_fme.c | 27 ++++++++++++++++++++-------  drive=
rs/raw/ifpga/base/opae_spi.h  |  1 +
 2 files changed, 21 insertions(+), 7 deletions(-)

diff --git a/drivers/raw/ifpga/base/ifpga_fme.c b/drivers/raw/ifpga/base/if=
pga_fme.c
index c31a94cf8..9057087b5 100644
--- a/drivers/raw/ifpga/base/ifpga_fme.c
+++ b/drivers/raw/ifpga/base/ifpga_fme.c
@@ -979,28 +979,32 @@ struct ifpga_feature_ops fme_spi_master_ops =3D {  st=
atic int nios_spi_wait_init_done(struct altera_spi_device *dev)  {
 	u32 val =3D 0;
-	unsigned long timeout =3D msecs_to_timer_cycles(10000);
+	unsigned long timeout =3D rte_get_timer_cycles() +
+			msecs_to_timer_cycles(10000);
 	unsigned long ticks;
 	int major_version;
+	int fecmode =3D FEC_MODE_NO;
=20
 	if (spi_reg_read(dev, NIOS_VERSION, &val))
 		return -EIO;
=20
-	major_version =3D (val >> NIOS_VERSION_MAJOR_SHIFT) &
-		NIOS_VERSION_MAJOR;
-	dev_debug(dev, "A10 NIOS FW version %d\n", major_version);
+	major_version =3D
+		(val & NIOS_VERSION_MAJOR) >> NIOS_VERSION_MAJOR_SHIFT;
+	dev_info(dev, "A10 NIOS FW version %d\n", major_version);
=20
 	if (major_version >=3D 3) {
 		/* read NIOS_INIT to check if PKVL INIT done or not */
 		if (spi_reg_read(dev, NIOS_INIT, &val))
 			return -EIO;
=20
+		dev_debug(dev, "read NIOS_INIT: 0x%x\n", val);
+
 		/* check if PKVLs are initialized already */
 		if (val & NIOS_INIT_DONE || val & NIOS_INIT_START)
 			goto nios_init_done;
=20
 		/* start to config the default FEC mode */
-		val =3D NIOS_INIT_START;
+		val =3D fecmode | NIOS_INIT_START;
=20
 		if (spi_reg_write(dev, NIOS_INIT, val))
 			return -EIO;
@@ -1010,14 +1014,23 @@ static int nios_spi_wait_init_done(struct altera_sp=
i_device *dev)
 	do {
 		if (spi_reg_read(dev, NIOS_INIT, &val))
 			return -EIO;
-		if (val)
+		if (val & NIOS_INIT_DONE)
 			break;
=20
 		ticks =3D rte_get_timer_cycles();
 		if (time_after(ticks, timeout))
 			return -ETIMEDOUT;
 		msleep(100);
-	} while (!val);
+	} while (1);
+
+	/* get the fecmode */
+	if (spi_reg_read(dev, NIOS_INIT, &val))
+		return -EIO;
+	dev_debug(dev, "read NIOS_INIT: 0x%x\n", val);
+	fecmode =3D (val & REQ_FEC_MODE) >> REQ_FEC_MODE_SHIFT;
+	dev_info(dev, "fecmode: 0x%x, %s\n", fecmode,
+			(fecmode =3D=3D FEC_MODE_KR) ? "kr" :
+			((fecmode =3D=3D FEC_MODE_RS) ? "rs" : "no"));
=20
 	return 0;
 }
diff --git a/drivers/raw/ifpga/base/opae_spi.h b/drivers/raw/ifpga/base/opa=
e_spi.h
index d20a4c3ed..73a227673 100644
--- a/drivers/raw/ifpga/base/opae_spi.h
+++ b/drivers/raw/ifpga/base/opae_spi.h
@@ -153,6 +153,7 @@ int spi_reg_read(struct altera_spi_device *dev, u32 reg=
, u32 *val);
=20
 #define NIOS_INIT		0x1000
 #define REQ_FEC_MODE		GENMASK(23, 8)
+#define REQ_FEC_MODE_SHIFT      8
 #define FEC_MODE_NO		0x0
 #define FEC_MODE_KR		0x5555
 #define FEC_MODE_RS		0xaaaa
--
2.17.1

Acked-by: Rosen Xu <rosen.xu@intel.com>