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From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: Damien Le Moal <dlemoal@kernel.org>
Cc: "Lorenzo Pieralisi" <lpieralisi@kernel.org>,
	"Kishon Vijay Abraham I" <kishon@kernel.org>,
	"Shawn Lin" <shawn.lin@rock-chips.com>,
	"Krzysztof Wilczyński" <kw@linux.com>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Heiko Stuebner" <heiko@sntech.de>,
	linux-pci@vger.kernel.org, "Rob Herring" <robh@kernel.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	"Rick Wertenbroek" <rick.wertenbroek@gmail.com>,
	"Wilfred Mallawa" <wilfred.mallawa@wdc.com>,
	"Niklas Cassel" <cassel@kernel.org>
Subject: Re: [PATCH v2 01/18] PCI: endpoint: Introduce pci_epc_function_is_valid()
Date: Wed, 3 Apr 2024 12:16:10 +0530	[thread overview]
Message-ID: <20240403064610.GB25309@thinkpad> (raw)
In-Reply-To: <20240330041928.1555578-2-dlemoal@kernel.org>

On Sat, Mar 30, 2024 at 01:19:11PM +0900, Damien Le Moal wrote:
> Introduce the epc core helper function pci_epc_function_is_valid() to
> verify that an epc pointer, a physical function number and a virtual
> function number are all valid. This avoids repeating the code pattern:
> 
> if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> 	return err;
> 
> if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> 	return err;
> 
> in many functions of the endpoint controller core code.
> 
> Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

One nit below. With that fixed,

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

> ---
>  drivers/pci/endpoint/pci-epc-core.c | 79 +++++++++++------------------
>  1 file changed, 31 insertions(+), 48 deletions(-)
> 
> diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
> index da3fc0795b0b..754afd115bbd 100644
> --- a/drivers/pci/endpoint/pci-epc-core.c
> +++ b/drivers/pci/endpoint/pci-epc-core.c
> @@ -126,6 +126,18 @@ enum pci_barno pci_epc_get_next_free_bar(const struct pci_epc_features
>  }
>  EXPORT_SYMBOL_GPL(pci_epc_get_next_free_bar);
>  
> +static inline bool pci_epc_function_is_valid(struct pci_epc *epc,
> +					     u8 func_no, u8 vfunc_no)

No need to add 'inline' keyword to function definitions in a .c file. Compiler
will handle that.

- Mani

> +{
> +	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> +		return false;
> +
> +	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +		return false;
> +
> +	return true;
> +}
> +
>  /**
>   * pci_epc_get_features() - get the features supported by EPC
>   * @epc: the features supported by *this* EPC device will be returned
> @@ -143,10 +155,7 @@ const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc,
>  {
>  	const struct pci_epc_features *epc_features;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> -		return NULL;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return NULL;
>  
>  	if (!epc->ops->get_features)
> @@ -216,10 +225,7 @@ int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  {
>  	int ret;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> -		return -EINVAL;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return -EINVAL;
>  
>  	if (!epc->ops->raise_irq)
> @@ -260,10 +266,7 @@ int pci_epc_map_msi_irq(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  {
>  	int ret;
>  
> -	if (IS_ERR_OR_NULL(epc))
> -		return -EINVAL;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return -EINVAL;
>  
>  	if (!epc->ops->map_msi_irq)
> @@ -291,10 +294,7 @@ int pci_epc_get_msi(struct pci_epc *epc, u8 func_no, u8 vfunc_no)
>  {
>  	int interrupt;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> -		return 0;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return 0;
>  
>  	if (!epc->ops->get_msi)
> @@ -327,11 +327,10 @@ int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 vfunc_no, u8 interrupts)
>  	int ret;
>  	u8 encode_int;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
> -	    interrupts < 1 || interrupts > 32)
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return -EINVAL;
>  
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (interrupts < 1 || interrupts > 32)
>  		return -EINVAL;
>  
>  	if (!epc->ops->set_msi)
> @@ -359,10 +358,7 @@ int pci_epc_get_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no)
>  {
>  	int interrupt;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> -		return 0;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return 0;
>  
>  	if (!epc->ops->get_msix)
> @@ -395,11 +391,10 @@ int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  {
>  	int ret;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
> -	    interrupts < 1 || interrupts > 2048)
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return -EINVAL;
>  
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (interrupts < 1 || interrupts > 2048)
>  		return -EINVAL;
>  
>  	if (!epc->ops->set_msix)
> @@ -426,10 +421,7 @@ EXPORT_SYMBOL_GPL(pci_epc_set_msix);
>  void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  			phys_addr_t phys_addr)
>  {
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> -		return;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return;
>  
>  	if (!epc->ops->unmap_addr)
> @@ -457,10 +449,7 @@ int pci_epc_map_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  {
>  	int ret;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> -		return -EINVAL;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return -EINVAL;
>  
>  	if (!epc->ops->map_addr)
> @@ -487,12 +476,11 @@ EXPORT_SYMBOL_GPL(pci_epc_map_addr);
>  void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  		       struct pci_epf_bar *epf_bar)
>  {
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
> -	    (epf_bar->barno == BAR_5 &&
> -	     epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return;
>  
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (epf_bar->barno == BAR_5 &&
> +	    epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64)
>  		return;
>  
>  	if (!epc->ops->clear_bar)
> @@ -519,18 +507,16 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  	int ret;
>  	int flags = epf_bar->flags;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
> -	    (epf_bar->barno == BAR_5 &&
> -	     flags & PCI_BASE_ADDRESS_MEM_TYPE_64) ||
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
> +		return -EINVAL;
> +
> +	if ((epf_bar->barno == BAR_5 && flags & PCI_BASE_ADDRESS_MEM_TYPE_64) ||
>  	    (flags & PCI_BASE_ADDRESS_SPACE_IO &&
>  	     flags & PCI_BASE_ADDRESS_IO_MASK) ||
>  	    (upper_32_bits(epf_bar->size) &&
>  	     !(flags & PCI_BASE_ADDRESS_MEM_TYPE_64)))
>  		return -EINVAL;
>  
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> -		return -EINVAL;
> -
>  	if (!epc->ops->set_bar)
>  		return 0;
>  
> @@ -559,10 +545,7 @@ int pci_epc_write_header(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
>  {
>  	int ret;
>  
> -	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
> -		return -EINVAL;
> -
> -	if (vfunc_no > 0 && (!epc->max_vfs || vfunc_no > epc->max_vfs[func_no]))
> +	if (!pci_epc_function_is_valid(epc, func_no, vfunc_no))
>  		return -EINVAL;
>  
>  	/* Only Virtual Function #1 has deviceID */
> -- 
> 2.44.0
> 

-- 
மணிவண்ணன் சதாசிவம்

  reply	other threads:[~2024-04-03  6:46 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-30  4:19 [PATCH v2 00/18] Improve PCI memory mapping API Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 01/18] PCI: endpoint: Introduce pci_epc_function_is_valid() Damien Le Moal
2024-04-03  6:46   ` Manivannan Sadhasivam [this message]
2024-04-05 13:33   ` Niklas Cassel
2024-03-30  4:19 ` [PATCH v2 02/18] PCI: endpoint: Introduce pci_epc_map_align() Damien Le Moal
2024-04-03  7:45   ` Manivannan Sadhasivam
2024-04-03  7:54     ` Damien Le Moal
2024-04-03  9:21       ` Manivannan Sadhasivam
2024-04-03 12:33   ` Kishon Vijay Abraham I
2024-04-04  2:43     ` Damien Le Moal
2024-04-05 12:20       ` Niklas Cassel
2024-04-05 12:43         ` Damien Le Moal
2024-04-05 15:18           ` Niklas Cassel
2024-04-10 11:57         ` Kishon Vijay Abraham I
2024-04-05  8:38   ` Dan Carpenter
2024-03-30  4:19 ` [PATCH v2 03/18] PCI: endpoint: Introduce pci_epc_mem_map()/unmap() Damien Le Moal
2024-04-03  9:48   ` Manivannan Sadhasivam
2024-04-05 14:10   ` Niklas Cassel
2024-03-30  4:19 ` [PATCH v2 04/18] PCI: endpoint: test: Use pci_epc_mem_map/unmap() Damien Le Moal
2024-04-05 13:37   ` Niklas Cassel
2024-03-30  4:19 ` [PATCH v2 05/18] PCI: endpoint: test: Synchronously cancel command handler work Damien Le Moal
2024-04-03  7:47   ` Manivannan Sadhasivam
2024-04-05 13:41     ` Niklas Cassel
2024-03-30  4:19 ` [PATCH v2 06/18] PCI: endpoint: test: Implement link_down event operation Damien Le Moal
2024-04-03  7:48   ` Manivannan Sadhasivam
2024-04-05 13:39     ` Niklas Cassel
2024-04-06  2:24       ` Manivannan Sadhasivam
2024-03-30  4:19 ` [PATCH v2 07/18] PCI: rockchip-ep: Fix address translation unit programming Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 08/18] PCI: rockchip-ep: Use a macro to define EP controller .align feature Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 09/18] PCI: rockchip-ep: Improve rockchip_pcie_ep_unmap_addr() Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 10/18] PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr() Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 11/18] PCI: rockchip-ep: Implement the map_align endpoint controller operation Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 12/18] PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() memory allocations Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 13/18] PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() MSI-X hiding Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 14/18] PCI: rockchip-ep: Refactor endpoint link training enable Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 15/18] PCI: rockship-ep: Introduce rockchip_pcie_ep_stop() Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 16/18] PCI: rockchip-ep: Improve link training Damien Le Moal
2024-04-03 11:54   ` Rick Wertenbroek
2024-03-30  4:19 ` [PATCH v2 17/18] dt-bindings: pci: rockchip,rk3399-pcie-ep: Add ep-gpios property Damien Le Moal
2024-03-30  9:16   ` Krzysztof Kozlowski
2024-03-31 23:06     ` Damien Le Moal
2024-04-01  9:57       ` Krzysztof Kozlowski
2024-04-01 23:36         ` Damien Le Moal
2024-04-02  7:33           ` Krzysztof Kozlowski
2024-04-02  7:38             ` Damien Le Moal
2024-04-02  7:55               ` Damien Le Moal
2024-04-02 18:10                 ` Krzysztof Kozlowski
2024-04-02 23:23                   ` Damien Le Moal
2024-04-02  7:38             ` Damien Le Moal
2024-03-30  4:19 ` [PATCH v2 18/18] PCI: rockchip-ep: Handle PERST# signal in endpoint mode Damien Le Moal
2024-04-02 12:36 ` [PATCH v2 00/18] Improve PCI memory mapping API Rick Wertenbroek
2024-04-03  7:50 ` Manivannan Sadhasivam
2024-04-03  7:58   ` Damien Le Moal
2024-04-03  9:25     ` Manivannan Sadhasivam

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