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
next prev parent 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240403064610.GB25309@thinkpad \
--to=manivannan.sadhasivam@linaro.org \
--cc=bhelgaas@google.com \
--cc=cassel@kernel.org \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dlemoal@kernel.org \
--cc=heiko@sntech.de \
--cc=kishon@kernel.org \
--cc=krzysztof.kozlowski+dt@linaro.org \
--cc=kw@linux.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-rockchip@lists.infradead.org \
--cc=lpieralisi@kernel.org \
--cc=rick.wertenbroek@gmail.com \
--cc=robh@kernel.org \
--cc=shawn.lin@rock-chips.com \
--cc=wilfred.mallawa@wdc.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).