From 9baa8a18e31b7167885c11c38841ce92bbe20f4f Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Wed, 18 Oct 2023 17:56:24 +0900
Subject: [PATCH] PCI: dwc: endpoint: Introduce .pre_init() and .deinit()
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Git-commit: 9baa8a18e31b7167885c11c38841ce92bbe20f4f
References: git-fixes
Patch-mainline: v6.7-rc1
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 WilczyĆski <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/pci/controller/dwc/pcie-designware-ep.c | 12 +++++++++++-
drivers/pci/controller/dwc/pcie-designware.h | 2 ++
2 files changed, 13 insertions(+), 1 deletion(-)
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -621,6 +621,9 @@ void dw_pcie_ep_exit(struct dw_pcie_ep *
epc->mem->window.page_size);
pci_epc_mem_exit(epc);
+
+ if (ep->ops->deinit)
+ ep->ops->deinit(ep);
}
static unsigned int dw_pcie_ep_find_ext_capability(struct dw_pcie *pci, int cap)
@@ -723,6 +726,9 @@ int dw_pcie_ep_init(struct dw_pcie_ep *e
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);
@@ -777,7 +783,7 @@ int dw_pcie_ep_init(struct dw_pcie_ep *e
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,
@@ -814,6 +820,10 @@ 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);
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -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);