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PCI: dwc: endpoint: Introduce .pre_init() and .deinit()

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Renesas R-Car Gen4 PCIe controllers require vendor-specific
initialization before .init().

To use dw->dbi and dw->num-lanes in the initialization code,
introduce .pre_init() into struct dw_pcie_ep_ops. While at it,
also introduce .deinit() to disable the controller by using
vendor-specific de-initialization.

Note that the ep_init in the struct dw_pcie_ep_ops should be
renamed to init later.

Link: https://lore.kernel.org/linux-pci/20231018085631.1121289-9-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
This commit is contained in:
Yoshihiro Shimoda 2023-10-18 17:56:24 +09:00 committed by Krzysztof Wilczyński
parent 303e845351
commit 9baa8a18e3
No known key found for this signature in database
GPG Key ID: 7C64768D3DE334E7
2 changed files with 13 additions and 1 deletions
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12
drivers/pci/controller/dwc/pcie-designware-ep.c
View File

@ -637,6 +637,9 @@ void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
epc->mem->window.page_size);
pci_epc_mem_exit(epc);
if (ep->ops->deinit)
ep->ops->deinit(ep);
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_exit);
@ -740,6 +743,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
ep->phys_base = res->start;
ep->addr_size = resource_size(res);
if (ep->ops->pre_init)
ep->ops->pre_init(ep);
dw_pcie_version_detect(pci);
dw_pcie_iatu_detect(pci);
@ -794,7 +800,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
ep->page_size);
if (ret < 0) {
dev_err(dev, "Failed to initialize address space\n");
return ret;
goto err_ep_deinit;
}
ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
@ -831,6 +837,10 @@ err_free_epc_mem:
err_exit_epc_mem:
pci_epc_mem_exit(epc);
err_ep_deinit:
if (ep->ops->deinit)
ep->ops->deinit(ep);
return ret;
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_init);

2
drivers/pci/controller/dwc/pcie-designware.h
View File

@ -330,7 +330,9 @@ struct dw_pcie_rp {
};
struct dw_pcie_ep_ops {
void (*pre_init)(struct dw_pcie_ep *ep);
void (*ep_init)(struct dw_pcie_ep *ep);
void (*deinit)(struct dw_pcie_ep *ep);
int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
enum pci_epc_irq_type type, u16 interrupt_num);
const struct pci_epc_features* (*get_features)(struct dw_pcie_ep *ep);