lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Mon, 27 Nov 2017 13:49:34 -0500
From:   Sinan Kaya <okaya@...eaurora.org>
To:     linux-pci@...r.kernel.org, timur@...eaurora.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        intel-gfx@...ts.freedesktop.org,
        Patrik Jakobsson <patrik.r.jakobsson@...il.com>,
        David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH V3 08/29] drm/gma500: deprecate pci_get_bus_and_slot()

+dri-devel@...ts.freedesktop.org

On 11/27/2017 11:57 AM, Sinan Kaya wrote:
> pci_get_bus_and_slot() is restrictive such that it assumes domain=0 as
> where a PCI device is present. This restricts the device drivers to be
> reused for other domain numbers.
> 
> Getting ready to remove pci_get_bus_and_slot() function in favor of
> pci_get_domain_bus_and_slot().
> 
> Add domain parameter to CDV_MSG_READ32, CDV_MSG_WRITE32, MRST_MSG_READ32,
> MRST_MSG_WRITE32, MDFLD_MSG_READ32, MDFLD_MSG_WRITE32.
> 
> Extract pci_dev from struct drm_device and use pdev to find the domain
> number while calling pci_get_domain_bus_and_slot().
> 
> Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
> ---
>  drivers/gpu/drm/gma500/cdv_device.c | 16 +++++++++-------
>  drivers/gpu/drm/gma500/gma_device.c |  4 +++-
>  drivers/gpu/drm/gma500/mid_bios.c   | 12 +++++++++---
>  drivers/gpu/drm/gma500/psb_drv.c    | 10 ++++++++--
>  drivers/gpu/drm/gma500/psb_drv.h    | 18 ++++++++++--------
>  5 files changed, 39 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/gma500/cdv_device.c b/drivers/gpu/drm/gma500/cdv_device.c
> index 8745971..3a3bf75 100644
> --- a/drivers/gpu/drm/gma500/cdv_device.c
> +++ b/drivers/gpu/drm/gma500/cdv_device.c
> @@ -185,21 +185,22 @@ static int cdv_backlight_init(struct drm_device *dev)
>   *	for this and the MID devices.
>   */
>  
> -static inline u32 CDV_MSG_READ32(uint port, uint offset)
> +static inline u32 CDV_MSG_READ32(int domain, uint port, uint offset)
>  {
>  	int mcr = (0x10<<24) | (port << 16) | (offset << 8);
>  	uint32_t ret_val = 0;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
>  	pci_write_config_dword(pci_root, 0xD0, mcr);
>  	pci_read_config_dword(pci_root, 0xD4, &ret_val);
>  	pci_dev_put(pci_root);
>  	return ret_val;
>  }
>  
> -static inline void CDV_MSG_WRITE32(uint port, uint offset, u32 value)
> +static inline void CDV_MSG_WRITE32(int domain, uint port, uint offset,
> +				   u32 value)
>  {
>  	int mcr = (0x11<<24) | (port << 16) | (offset << 8) | 0xF0;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
>  	pci_write_config_dword(pci_root, 0xD4, value);
>  	pci_write_config_dword(pci_root, 0xD0, mcr);
>  	pci_dev_put(pci_root);
> @@ -216,11 +217,12 @@ static void cdv_init_pm(struct drm_device *dev)
>  {
>  	struct drm_psb_private *dev_priv = dev->dev_private;
>  	u32 pwr_cnt;
> +	int domain = pci_domain_nr(dev->pdev->bus);
>  	int i;
>  
> -	dev_priv->apm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
> +	dev_priv->apm_base = CDV_MSG_READ32(domain, PSB_PUNIT_PORT,
>  							PSB_APMBA) & 0xFFFF;
> -	dev_priv->ospm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
> +	dev_priv->ospm_base = CDV_MSG_READ32(domain, PSB_PUNIT_PORT,
>  							PSB_OSPMBA) & 0xFFFF;
>  
>  	/* Power status */
> @@ -251,7 +253,7 @@ static void cdv_errata(struct drm_device *dev)
>  	 *	Bonus Launch to work around the issue, by degrading
>  	 *	performance.
>  	 */
> -	 CDV_MSG_WRITE32(3, 0x30, 0x08027108);
> +	 CDV_MSG_WRITE32(pci_domain_nr(dev->pdev->bus), 3, 0x30, 0x08027108);
>  }
>  
>  /**
> diff --git a/drivers/gpu/drm/gma500/gma_device.c b/drivers/gpu/drm/gma500/gma_device.c
> index 4a295f9..a7fb6de 100644
> --- a/drivers/gpu/drm/gma500/gma_device.c
> +++ b/drivers/gpu/drm/gma500/gma_device.c
> @@ -19,7 +19,9 @@
>  void gma_get_core_freq(struct drm_device *dev)
>  {
>  	uint32_t clock;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root =
> +		pci_get_domain_bus_and_slot(pci_domain_nr(dev->pdev->bus),
> +					    0, 0);
>  	struct drm_psb_private *dev_priv = dev->dev_private;
>  
>  	/*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
> diff --git a/drivers/gpu/drm/gma500/mid_bios.c b/drivers/gpu/drm/gma500/mid_bios.c
> index d75ecb3..5c23d4e 100644
> --- a/drivers/gpu/drm/gma500/mid_bios.c
> +++ b/drivers/gpu/drm/gma500/mid_bios.c
> @@ -32,7 +32,9 @@
>  static void mid_get_fuse_settings(struct drm_device *dev)
>  {
>  	struct drm_psb_private *dev_priv = dev->dev_private;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root =
> +		pci_get_domain_bus_and_slot(pci_domain_nr(dev->pdev->bus),
> +					    0, 0);
>  	uint32_t fuse_value = 0;
>  	uint32_t fuse_value_tmp = 0;
>  
> @@ -104,7 +106,9 @@ static void mid_get_fuse_settings(struct drm_device *dev)
>  static void mid_get_pci_revID(struct drm_psb_private *dev_priv)
>  {
>  	uint32_t platform_rev_id = 0;
> -	struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
> +	int domain = pci_domain_nr(dev_priv->dev->pdev->bus);
> +	struct pci_dev *pci_gfx_root =
> +		pci_get_domain_bus_and_slot(domain, 0, PCI_DEVFN(2, 0));
>  
>  	if (pci_gfx_root == NULL) {
>  		WARN_ON(1);
> @@ -281,7 +285,9 @@ static void mid_get_vbt_data(struct drm_psb_private *dev_priv)
>  	u32 addr;
>  	u8 __iomem *vbt_virtual;
>  	struct mid_vbt_header vbt_header;
> -	struct pci_dev *pci_gfx_root = pci_get_bus_and_slot(0, PCI_DEVFN(2, 0));
> +	struct pci_dev *pci_gfx_root =
> +		pci_get_domain_bus_and_slot(pci_domain_nr(dev->pdev->bus),
> +					    0, PCI_DEVFN(2, 0));
>  	int ret = -1;
>  
>  	/* Get the address of the platform config vbt */
> diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c
> index 37a3be7..99d6527 100644
> --- a/drivers/gpu/drm/gma500/psb_drv.c
> +++ b/drivers/gpu/drm/gma500/psb_drv.c
> @@ -261,7 +261,11 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
>  		goto out_err;
>  
>  	if (IS_MRST(dev)) {
> -		dev_priv->aux_pdev = pci_get_bus_and_slot(0, PCI_DEVFN(3, 0));
> +		int domain = pci_domain_nr(dev->pdev->bus);
> +
> +		dev_priv->aux_pdev =
> +			pci_get_domain_bus_and_slot(domain, 0,
> +						    PCI_DEVFN(3, 0));
>  
>  		if (dev_priv->aux_pdev) {
>  			resource_start = pci_resource_start(dev_priv->aux_pdev,
> @@ -281,7 +285,9 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags)
>  		}
>  		dev_priv->gmbus_reg = dev_priv->aux_reg;
>  
> -		dev_priv->lpc_pdev = pci_get_bus_and_slot(0, PCI_DEVFN(31, 0));
> +		dev_priv->lpc_pdev =
> +			pci_get_domain_bus_and_slot(domain, 0,
> +						    PCI_DEVFN(31, 0));
>  		if (dev_priv->lpc_pdev) {
>  			pci_read_config_word(dev_priv->lpc_pdev, PSB_LPC_GBA,
>  				&dev_priv->lpc_gpio_base);
> diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h
> index 821497d..d409e02 100644
> --- a/drivers/gpu/drm/gma500/psb_drv.h
> +++ b/drivers/gpu/drm/gma500/psb_drv.h
> @@ -781,38 +781,40 @@ extern int psb_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
>  extern int drm_idle_check_interval;
>  
>  /* Utilities */
> -static inline u32 MRST_MSG_READ32(uint port, uint offset)
> +static inline u32 MRST_MSG_READ32(int domain, uint port, uint offset)
>  {
>  	int mcr = (0xD0<<24) | (port << 16) | (offset << 8);
>  	uint32_t ret_val = 0;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
>  	pci_write_config_dword(pci_root, 0xD0, mcr);
>  	pci_read_config_dword(pci_root, 0xD4, &ret_val);
>  	pci_dev_put(pci_root);
>  	return ret_val;
>  }
> -static inline void MRST_MSG_WRITE32(uint port, uint offset, u32 value)
> +static inline void MRST_MSG_WRITE32(int domain, uint port, uint offset,
> +				    u32 value)
>  {
>  	int mcr = (0xE0<<24) | (port << 16) | (offset << 8) | 0xF0;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
>  	pci_write_config_dword(pci_root, 0xD4, value);
>  	pci_write_config_dword(pci_root, 0xD0, mcr);
>  	pci_dev_put(pci_root);
>  }
> -static inline u32 MDFLD_MSG_READ32(uint port, uint offset)
> +static inline u32 MDFLD_MSG_READ32(int domain, uint port, uint offset)
>  {
>  	int mcr = (0x10<<24) | (port << 16) | (offset << 8);
>  	uint32_t ret_val = 0;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
>  	pci_write_config_dword(pci_root, 0xD0, mcr);
>  	pci_read_config_dword(pci_root, 0xD4, &ret_val);
>  	pci_dev_put(pci_root);
>  	return ret_val;
>  }
> -static inline void MDFLD_MSG_WRITE32(uint port, uint offset, u32 value)
> +static inline void MDFLD_MSG_WRITE32(int domain, uint port, uint offset,
> +				     u32 value)
>  {
>  	int mcr = (0x11<<24) | (port << 16) | (offset << 8) | 0xF0;
> -	struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
> +	struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
>  	pci_write_config_dword(pci_root, 0xD4, value);
>  	pci_write_config_dword(pci_root, 0xD0, mcr);
>  	pci_dev_put(pci_root);
> 


-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.

Powered by blists - more mailing lists