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Subject[PATCH v5 09/12] PCI: endpoint: Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar
Date
Make epc->ops->clear_bar()/pci_epc_clear_bar() take struct *epf_bar.

This is needed so that epc->ops->clear_bar() can clear the BAR pair,
if the BAR is 64-bits wide.

This also makes it possible for pci_epc_clear_bar() to sanity check
the flags.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
---
drivers/pci/cadence/pcie-cadence-ep.c | 3 ++-
drivers/pci/dwc/pcie-designware-ep.c | 13 ++++++++++---
drivers/pci/endpoint/functions/pci-epf-test.c | 5 ++++-
drivers/pci/endpoint/pci-epc-core.c | 7 ++++---
include/linux/pci-epc.h | 5 +++--
5 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/drivers/pci/cadence/pcie-cadence-ep.c b/drivers/pci/cadence/pcie-cadence-ep.c
index 2905e098678c..3d8283e450a9 100644
--- a/drivers/pci/cadence/pcie-cadence-ep.c
+++ b/drivers/pci/cadence/pcie-cadence-ep.c
@@ -145,10 +145,11 @@ static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
}

static void cdns_pcie_ep_clear_bar(struct pci_epc *epc, u8 fn,
- enum pci_barno bar)
+ struct pci_epf_bar *epf_bar)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
+ enum pci_barno bar = epf_bar->barno;
u32 reg, cfg, b, ctrl;

if (bar < BAR_4) {
diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-designware-ep.c
index 571b90f88d84..cc4d8381c1dc 100644
--- a/drivers/pci/dwc/pcie-designware-ep.c
+++ b/drivers/pci/dwc/pcie-designware-ep.c
@@ -19,7 +19,8 @@ void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
pci_epc_linkup(epc);
}

-void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
+static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar,
+ int flags)
{
u32 reg;

@@ -30,6 +31,11 @@ void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
dw_pcie_dbi_ro_wr_dis(pci);
}

+void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
+{
+ __dw_pcie_ep_reset_bar(pci, bar, 0);
+}
+
static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr)
{
@@ -104,13 +110,14 @@ static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, phys_addr_t phys_addr,
}

static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
- enum pci_barno bar)
+ struct pci_epf_bar *epf_bar)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ enum pci_barno bar = epf_bar->barno;
u32 atu_index = ep->bar_to_atu[bar];

- dw_pcie_ep_reset_bar(pci, bar);
+ __dw_pcie_ep_reset_bar(pci, bar, epf_bar->flags);

dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_INBOUND);
clear_bit(atu_index, ep->ib_window_map);
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index d46e3ebabb8e..7cef85124325 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -344,14 +344,17 @@ static void pci_epf_test_unbind(struct pci_epf *epf)
{
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
struct pci_epc *epc = epf->epc;
+ struct pci_epf_bar *epf_bar;
int bar;

cancel_delayed_work(&epf_test->cmd_handler);
pci_epc_stop(epc);
for (bar = BAR_0; bar <= BAR_5; bar++) {
+ epf_bar = &epf->bar[bar];
+
if (epf_test->reg[bar]) {
pci_epf_free_space(epf, epf_test->reg[bar], bar);
- pci_epc_clear_bar(epc, epf->func_no, bar);
+ pci_epc_clear_bar(epc, epf->func_no, epf_bar);
}
}
}
diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c
index 8637822605ff..eccc942043cb 100644
--- a/drivers/pci/endpoint/pci-epc-core.c
+++ b/drivers/pci/endpoint/pci-epc-core.c
@@ -276,11 +276,12 @@ EXPORT_SYMBOL_GPL(pci_epc_map_addr);
* pci_epc_clear_bar() - reset the BAR
* @epc: the EPC device for which the BAR has to be cleared
* @func_no: the endpoint function number in the EPC device
- * @bar: the BAR number that has to be reset
+ * @epf_bar: the struct epf_bar that contains the BAR information
*
* Invoke to reset the BAR of the endpoint device.
*/
-void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar)
+void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_bar *epf_bar)
{
unsigned long flags;

@@ -291,7 +292,7 @@ void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar)
return;

spin_lock_irqsave(&epc->lock, flags);
- epc->ops->clear_bar(epc, func_no, bar);
+ epc->ops->clear_bar(epc, func_no, epf_bar);
spin_unlock_irqrestore(&epc->lock, flags);
}
EXPORT_SYMBOL_GPL(pci_epc_clear_bar);
diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h
index 75bae8aabbf9..af657ca58b70 100644
--- a/include/linux/pci-epc.h
+++ b/include/linux/pci-epc.h
@@ -41,7 +41,7 @@ struct pci_epc_ops {
int (*set_bar)(struct pci_epc *epc, u8 func_no,
struct pci_epf_bar *epf_bar);
void (*clear_bar)(struct pci_epc *epc, u8 func_no,
- enum pci_barno bar);
+ struct pci_epf_bar *epf_bar);
int (*map_addr)(struct pci_epc *epc, u8 func_no,
phys_addr_t addr, u64 pci_addr, size_t size);
void (*unmap_addr)(struct pci_epc *epc, u8 func_no,
@@ -127,7 +127,8 @@ int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);
int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
struct pci_epf_bar *epf_bar);
-void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar);
+void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no,
+ struct pci_epf_bar *epf_bar);
int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr,
u64 pci_addr, size_t size);
--
2.14.2
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