From: Damien Le Moal <dlemoal@kernel.org>
To: "Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.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
Cc: linux-rockchip@lists.infradead.org
Subject: [PATCH 01/19] PCI: endpoint: Introduce pci_epc_check_func()
Date: Fri, 29 Mar 2024 18:09:27 +0900 [thread overview]
Message-ID: <20240329090945.1097609-2-dlemoal@kernel.org> (raw)
In-Reply-To: <20240329090945.1097609-1-dlemoal@kernel.org>
Introduce the small epc core helper function pci_epc_check_func() to
check 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>
---
drivers/pci/endpoint/pci-epc-core.c | 78 +++++++++++------------------
1 file changed, 30 insertions(+), 48 deletions(-)
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index da3fc0795b0b..26fe2c255fc9 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -126,6 +126,17 @@ enum pci_barno pci_epc_get_next_free_bar(const struct pci_epc_features
}
EXPORT_SYMBOL_GPL(pci_epc_get_next_free_bar);
+static bool pci_epc_check_func(struct pci_epc *epc, u8 func_no, u8 vfunc_no)
+{
+ 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 +154,7 @@ 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_check_func(epc, func_no, vfunc_no))
return NULL;
if (!epc->ops->get_features)
@@ -216,10 +224,7 @@ 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_check_func(epc, func_no, vfunc_no))
return -EINVAL;
if (!epc->ops->raise_irq)
@@ -260,10 +265,7 @@ 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_check_func(epc, func_no, vfunc_no))
return -EINVAL;
if (!epc->ops->map_msi_irq)
@@ -291,10 +293,7 @@ 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_check_func(epc, func_no, vfunc_no))
return 0;
if (!epc->ops->get_msi)
@@ -327,11 +326,10 @@ 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_check_func(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 +357,7 @@ 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_check_func(epc, func_no, vfunc_no))
return 0;
if (!epc->ops->get_msix)
@@ -395,11 +390,10 @@ 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_check_func(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 +420,7 @@ 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_check_func(epc, func_no, vfunc_no))
return;
if (!epc->ops->unmap_addr)
@@ -457,10 +448,7 @@ 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_check_func(epc, func_no, vfunc_no))
return -EINVAL;
if (!epc->ops->map_addr)
@@ -487,12 +475,11 @@ 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_check_func(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 +506,16 @@ 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_check_func(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 +544,7 @@ 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_check_func(epc, func_no, vfunc_no))
return -EINVAL;
/* Only Virtual Function #1 has deviceID */
--
2.44.0
next prev parent reply other threads:[~2024-03-29 9:09 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-29 9:09 [PATCH 00/19] Improve PCI memory mapping API Damien Le Moal
2024-03-29 9:09 ` Damien Le Moal [this message]
2024-03-29 12:33 ` [PATCH 01/19] PCI: endpoint: Introduce pci_epc_check_func() Bjorn Helgaas
2024-03-29 9:09 ` [PATCH 02/19] PCI: endpoint: Improve pci_epc_mem_alloc_addr() Damien Le Moal
2024-03-29 15:32 ` Frank Li
2024-03-29 9:09 ` [PATCH 03/19] PCI: endpoint: Introduce pci_epc_map_align() Damien Le Moal
2024-03-29 9:09 ` [PATCH 04/19] PCI: endpoint: Introduce pci_epc_mem_map()/unmap() Damien Le Moal
2024-03-29 9:09 ` [PATCH 05/19] PCI: endpoint: test: Use pci_epc_mem_map/unmap() Damien Le Moal
2024-03-29 9:09 ` [PATCH 06/19] PCI: endpoint: test: Synchronously cancel command handler work Damien Le Moal
2024-03-29 15:36 ` Frank Li
2024-03-29 9:09 ` [PATCH 07/19] PCI: endpoint: test: Implement link_down event operation Damien Le Moal
2024-03-29 15:37 ` Frank Li
2024-03-29 9:09 ` [PATCH 08/19] PCI: rockchip-ep: Fix address translation unit programming Damien Le Moal
2024-03-29 9:09 ` [PATCH 09/19] PCI: rockchip-ep: use macro to define EP controller .align feature Damien Le Moal
2024-03-29 9:09 ` [PATCH 10/19] PCI: rockchip-ep: Improve rockchip_pcie_ep_unmap_addr() Damien Le Moal
2024-03-29 9:09 ` [PATCH 11/19] PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr() Damien Le Moal
2024-03-29 9:09 ` [PATCH 12/19] PCI: rockchip-ep: Implement the map_info endpoint controller operation Damien Le Moal
2024-03-29 9:09 ` [PATCH 13/19] PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() memory allocations Damien Le Moal
2024-03-29 9:09 ` [PATCH 14/19] PCI: rockchip-ep: Refactor rockchip_pcie_ep_probe() MSIX hiding Damien Le Moal
2024-03-29 9:09 ` [PATCH 15/19] PCI: rockchip-ep: Refactor endpoint link training enable Damien Le Moal
2024-03-29 9:09 ` [PATCH 16/19] PCI: rockship-ep: Introduce rockchip_pcie_ep_stop() Damien Le Moal
2024-03-29 9:09 ` [PATCH 17/19] PCI: rockchip-ep: Improve link training Damien Le Moal
2024-03-31 2:03 ` kernel test robot
2024-03-29 9:09 ` [PATCH 18/19] dt-bindings: pci: rockchip,rk3399-pcie-ep: Add ep-gpios property Damien Le Moal
2024-03-29 12:28 ` Krzysztof Kozlowski
2024-03-29 9:09 ` [PATCH 19/19] PCI: rockchip-ep: Handle PERST signal in endpoint mode Damien Le Moal
2024-03-30 10:31 ` kernel test robot
2024-03-31 5:40 ` kernel test robot
2024-03-29 12:41 ` [PATCH 00/19] Improve PCI memory mapping API Bjorn Helgaas
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