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From: Bjorn Helgaas <helgaas@kernel.org>
To: "Pali Rohár" <pali@kernel.org>
Cc: "Jason Cooper" <jason@lakedaemon.net>,
	"Andrew Lunn" <andrew@lunn.ch>,
	"Gregory Clement" <gregory.clement@bootlin.com>,
	"Sebastian Hesselbarth" <sebastian.hesselbarth@gmail.com>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
	"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Andrew Murray" <amurray@thegoodpenguin.co.uk>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Remi Pommarel" <repk@triplefau.lt>,
	"Marek Behún" <marek.behun@nic.cz>,
	"Tomasz Maciej Nowak" <tmn505@gmail.com>,
	Xogium <contact@xogium.me>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-pci@vger.kernel.org
Subject: Re: [PATCH v4 08/12] PCI: aardvark: Replace custom macros by standard linux/pci_regs.h macros
Date: Mon, 4 May 2020 10:52:47 -0500	[thread overview]
Message-ID: <20200504155247.GA271721@bjorn-Precision-5520> (raw)
In-Reply-To: <20200430080625.26070-9-pali@kernel.org>

On Thu, Apr 30, 2020 at 10:06:21AM +0200, Pali Rohár wrote:
> PCI-E capability macros are already defined in linux/pci_regs.h.
> Remove their reimplementation in pcie-aardvark.

s/PCI-E/PCIe/

I mentioned this last time, but I guess you missed it.

> Signed-off-by: Pali Rohár <pali@kernel.org>
> ---
>  drivers/pci/controller/pci-aardvark.c | 41 ++++++++++++---------------
>  1 file changed, 18 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c
> index 053ae6c19a3d..c53ae2511a9c 100644
> --- a/drivers/pci/controller/pci-aardvark.c
> +++ b/drivers/pci/controller/pci-aardvark.c
> @@ -34,17 +34,6 @@
>  #define     PCIE_CORE_CMD_MEM_IO_REQ_EN				BIT(2)
>  #define PCIE_CORE_DEV_REV_REG					0x8
>  #define PCIE_CORE_PCIEXP_CAP					0xc0
> -#define PCIE_CORE_DEV_CTRL_STATS_REG				0xc8
> -#define     PCIE_CORE_DEV_CTRL_STATS_RELAX_ORDER_DISABLE	(0 << 4)
> -#define     PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SZ_SHIFT	5
> -#define     PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE		(0 << 11)
> -#define     PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT	12
> -#define     PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SZ		0x2
> -#define PCIE_CORE_LINK_CTRL_STAT_REG				0xd0
> -#define     PCIE_CORE_LINK_L0S_ENTRY				BIT(0)
> -#define     PCIE_CORE_LINK_TRAINING				BIT(5)
> -#define     PCIE_CORE_LINK_SPEED_SHIFT				16
> -#define     PCIE_CORE_LINK_WIDTH_SHIFT				20
>  #define PCIE_CORE_ERR_CAPCTL_REG				0x118
>  #define     PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX			BIT(5)
>  #define     PCIE_CORE_ERR_CAPCTL_ECRC_CHK_TX_EN			BIT(6)
> @@ -223,6 +212,11 @@ static inline u32 advk_readl(struct advk_pcie *pcie, u64 reg)
>  	return readl(pcie->base + reg);
>  }
>  
> +static inline u16 advk_read16(struct advk_pcie *pcie, u64 reg)
> +{
> +	return advk_readl(pcie, (reg & ~0x3)) >> ((reg & 0x3) * 8);
> +}
> +
>  static int advk_pcie_link_up(struct advk_pcie *pcie)
>  {
>  	u32 val, ltssm_state;
> @@ -286,16 +280,16 @@ static int advk_pcie_train_at_gen(struct advk_pcie *pcie, int gen)
>  	 * Start link training immediately after enabling it.
>  	 * This solves problems for some buggy cards.
>  	 */
> -	reg = advk_readl(pcie, PCIE_CORE_LINK_CTRL_STAT_REG);
> -	reg |= PCIE_CORE_LINK_TRAINING;
> -	advk_writel(pcie, reg, PCIE_CORE_LINK_CTRL_STAT_REG);
> +	reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL);
> +	reg |= PCI_EXP_LNKCTL_RL;
> +	advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKCTL);
>  
>  	ret = advk_pcie_wait_for_link(pcie);
>  	if (ret)
>  		return ret;
>  
> -	reg = advk_readl(pcie, PCIE_CORE_LINK_CTRL_STAT_REG);
> -	neg_gen = (reg >> PCIE_CORE_LINK_SPEED_SHIFT) & 0xf;
> +	reg = advk_read16(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_LNKSTA);
> +	neg_gen = reg & PCI_EXP_LNKSTA_CLS;
>  
>  	return neg_gen;
>  }
> @@ -385,13 +379,14 @@ static void advk_pcie_setup_hw(struct advk_pcie *pcie)
>  		PCIE_CORE_ERR_CAPCTL_ECRC_CHCK_RCV;
>  	advk_writel(pcie, reg, PCIE_CORE_ERR_CAPCTL_REG);
>  
> -	/* Set PCIe Device Control and Status 1 PF0 register */
> -	reg = PCIE_CORE_DEV_CTRL_STATS_RELAX_ORDER_DISABLE |
> -		(7 << PCIE_CORE_DEV_CTRL_STATS_MAX_PAYLOAD_SZ_SHIFT) |
> -		PCIE_CORE_DEV_CTRL_STATS_SNOOP_DISABLE |
> -		(PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SZ <<
> -		 PCIE_CORE_DEV_CTRL_STATS_MAX_RD_REQ_SIZE_SHIFT);
> -	advk_writel(pcie, reg, PCIE_CORE_DEV_CTRL_STATS_REG);
> +	/* Set PCIe Device Control register */
> +	reg = advk_readl(pcie, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL);
> +	reg &= ~PCI_EXP_DEVCTL_RELAX_EN;
> +	reg &= ~PCI_EXP_DEVCTL_NOSNOOP_EN;
> +	reg &= ~PCI_EXP_DEVCTL_READRQ;
> +	reg |= PCI_EXP_DEVCTL_PAYLOAD; /* Set max payload size */
> +	reg |= PCI_EXP_DEVCTL_READRQ_512B;
> +	advk_writel(pcie, reg, PCIE_CORE_PCIEXP_CAP + PCI_EXP_DEVCTL);
>  
>  	/* Program PCIe Control 2 to disable strict ordering */
>  	reg = PCIE_CORE_CTRL2_RESERVED |
> -- 
> 2.20.1
> 

  reply	other threads:[~2020-05-04 15:52 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-30  8:06 [PATCH v4 00/12] PCI: aardvark: Fix support for Turris MOX and Compex wifi cards Pali Rohár
2020-04-30  8:06 ` [PATCH v4 01/12] PCI: aardvark: Train link immediately after enabling training Pali Rohár
2020-05-04 15:50   ` Bjorn Helgaas
2020-05-07 21:05   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 02/12] PCI: aardvark: Don't blindly enable ASPM L0s and don't write to read-only register Pali Rohár
2020-05-07 21:07   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 03/12] PCI: of: Zero max-link-speed value is invalid Pali Rohár
2020-05-07 21:07   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 04/12] PCI: aardvark: Improve link training Pali Rohár
2020-05-07 21:10   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 05/12] PCI: aardvark: Issue PERST via GPIO Pali Rohár
2020-04-30  8:22   ` Pali Rohár
2020-05-07 21:20     ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 06/12] PCI: aardvark: Add FIXME comment for PCIE_CORE_CMD_STATUS_REG access Pali Rohár
2020-05-07 21:20   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 07/12] PCI: aardvark: Add PHY support Pali Rohár
2020-05-07 21:23   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 08/12] PCI: aardvark: Replace custom macros by standard linux/pci_regs.h macros Pali Rohár
2020-05-04 15:52   ` Bjorn Helgaas [this message]
2020-05-07 21:24   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 09/12] dt-bindings: PCI: aardvark: Describe new properties Pali Rohár
2020-05-07 21:25   ` Rob Herring
2020-04-30  8:06 ` [PATCH v4 10/12] arm64: dts: marvell: armada-37xx: Set pcie_reset_pin to gpio function Pali Rohár
2020-04-30  8:06 ` [PATCH v4 11/12] arm64: dts: marvell: armada-37xx: Move PCIe comphy handle property Pali Rohár
2020-04-30  8:06 ` [PATCH v4 12/12] arm64: dts: marvell: armada-37xx: Move PCIe max-link-speed property Pali Rohár
2020-05-04 15:50   ` Bjorn Helgaas
2020-05-08 13:11 ` [PATCH v4 00/12] PCI: aardvark: Fix support for Turris MOX and Compex wifi cards Tomasz Maciej Nowak
2020-05-13 11:16 ` Pali Rohár
2020-05-13 11:33   ` Lorenzo Pieralisi
2020-05-13 11:59     ` Pali Rohár
2020-05-13 11:56 ` Thomas Petazzoni
2020-05-17 15:57   ` Gregory CLEMENT
2020-05-18 10:30     ` Pali Rohár
2020-05-18 13:46       ` Lorenzo Pieralisi
2020-05-18 13:50         ` Marek Behun

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