[PATCH v9 01/10] PCI: dwc: ep: Remove deinit() callback from struct dw_pcie_ep_ops

Manivannan Sadhasivam
2024-03-04T09:22:56Z

deinit() callback was solely introduced for the pcie-rcar-gen4 driver where
it is used to do platform specific resource deallocation. And this callback
is called right at the end of the dw_pcie_ep_exit() API. So it doesn't
matter whether it is called within or outside of dw_pcie_ep_exit() API.

So let's remove this callback and directly call rcar_gen4_pcie_ep_deinit()
in pcie-rcar-gen4 driver to do resource deallocation after the completion
of dw_pcie_ep_exit() API in rcar_gen4_remove_dw_pcie_ep().

This simplifies the DWC layer.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pci/controller/dwc/pcie-designware-ep.c | 9 +--------
drivers/pci/controller/dwc/pcie-designware.h | 1 -
drivers/pci/controller/dwc/pcie-rcar-gen4.c | 14 ++++++++------
3 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 5befed2dc02b..d305f9b4cdfe 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -575,9 +575,6 @@ 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);

@@ -738,7 +735,7 @@ 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");
- goto err_ep_deinit;
+ return ret;
}

ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
@@ -775,10 +772,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
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);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 26dae4837462..ab7431a37209 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -333,7 +333,6 @@ struct dw_pcie_rp {
struct dw_pcie_ep_ops {
void (*pre_init)(struct dw_pcie_ep *ep);
void (*init)(struct dw_pcie_ep *ep);
- void (*deinit)(struct dw_pcie_ep *ep);
int (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
unsigned int type, u16 interrupt_num);
const struct pci_epc_features* (*get_features)(struct dw_pcie_ep *ep);
diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
index e9166619b1f9..ac97d594ea47 100644
--- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c
+++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c
@@ -352,11 +352,8 @@ static void rcar_gen4_pcie_ep_init(struct dw_pcie_ep *ep)
dw_pcie_ep_reset_bar(pci, bar);
}

-static void rcar_gen4_pcie_ep_deinit(struct dw_pcie_ep *ep)
+static void rcar_gen4_pcie_ep_deinit(struct rcar_gen4_pcie *rcar)
{
- struct dw_pcie *dw = to_dw_pcie_from_ep(ep);
- struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw);
-
writel(0, rcar->base + PCIEDMAINTSTSEN);
rcar_gen4_pcie_common_deinit(rcar);
}
@@ -408,7 +405,6 @@ static unsigned int rcar_gen4_pcie_ep_get_dbi2_offset(struct dw_pcie_ep *ep,
static const struct dw_pcie_ep_ops pcie_ep_ops = {
.pre_init = rcar_gen4_pcie_ep_pre_init,
.init = rcar_gen4_pcie_ep_init,
- .deinit = rcar_gen4_pcie_ep_deinit,
.raise_irq = rcar_gen4_pcie_ep_raise_irq,
.get_features = rcar_gen4_pcie_ep_get_features,
.get_dbi_offset = rcar_gen4_pcie_ep_get_dbi_offset,
@@ -418,18 +414,24 @@ static const struct dw_pcie_ep_ops pcie_ep_ops = {
static int rcar_gen4_add_dw_pcie_ep(struct rcar_gen4_pcie *rcar)
{
struct dw_pcie_ep *ep = &rcar->dw.ep;
+ int ret;

if (!IS_ENABLED(CONFIG_PCIE_RCAR_GEN4_EP))
return -ENODEV;

ep->ops = &pcie_ep_ops;

- return dw_pcie_ep_init(ep);
+ ret = dw_pcie_ep_init(ep);
+ if (ret)
+ rcar_gen4_pcie_ep_deinit(rcar);
+
+ return ret;
}

static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar)
{
dw_pcie_ep_exit(&rcar->dw.ep);
+ rcar_gen4_pcie_ep_deinit(rcar);
}

/* Common */

--
2.25.1