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PCI: endpoint: Simplify epc->ops->set_bar()/pci_epc_set_bar() 

Add barno and flags to struct epf_bar.
That way we can simplify epc->ops->set_bar()/pci_epc_set_bar()
by passing a struct *epf_bar instead of a whole lot of arguments.

This is needed so that epc->ops->set_bar() implementations can
modify BAR flags. Will be utilized in a succeeding patch.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Niklas Cassel 2018-03-28 13:50:07 +02:00 committed by Lorenzo Pieralisi
parent bf597574b6
commit bc4a48976f
7 changed files with 25 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/pci/cadence/pcie-cadence-ep.c
View File

@ -77,16 +77,19 @@ static int cdns_pcie_ep_write_header(struct pci_epc *epc, u8 fn,
return 0;
}
static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn, enum pci_barno bar,
dma_addr_t bar_phys, size_t size, int flags)
static int cdns_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
struct pci_epf_bar *epf_bar)
{
struct cdns_pcie_ep *ep = epc_get_drvdata(epc);
struct cdns_pcie *pcie = &ep->pcie;
dma_addr_t bar_phys = epf_bar->phys_addr;
enum pci_barno bar = epf_bar->barno;
int flags = epf_bar->flags;
u32 addr0, addr1, reg, cfg, b, aperture, ctrl;
u64 sz;
/* BAR size is 2^(aperture + 7) */
sz = max_t(size_t, size, CDNS_PCIE_EP_MIN_APERTURE);
sz = max_t(size_t, epf_bar->size, CDNS_PCIE_EP_MIN_APERTURE);
/*
* roundup_pow_of_two() returns an unsigned long, which is not suited
* for 64bit values.

8
drivers/pci/dwc/pcie-designware-ep.c
View File

@ -117,12 +117,14 @@ static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
}
static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
enum pci_barno bar,
dma_addr_t bar_phys, size_t size, int flags)
struct pci_epf_bar *epf_bar)
{
int ret;
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;
size_t size = epf_bar->size;
int flags = epf_bar->flags;
enum dw_pcie_as_type as_type;
u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
@ -131,7 +133,7 @@ static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
else
as_type = DW_PCIE_AS_IO;
ret = dw_pcie_ep_inbound_atu(ep, bar, bar_phys, as_type);
ret = dw_pcie_ep_inbound_atu(ep, bar, epf_bar->phys_addr, as_type);
if (ret)
return ret;

8
drivers/pci/endpoint/functions/pci-epf-test.c
View File

@ -358,7 +358,6 @@ static void pci_epf_test_unbind(struct pci_epf *epf)
static int pci_epf_test_set_bar(struct pci_epf *epf)
{
int flags;
int bar;
int ret;
struct pci_epf_bar *epf_bar;
@ -370,14 +369,11 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
for (bar = BAR_0; bar <= BAR_5; bar++) {
epf_bar = &epf->bar[bar];
flags = PCI_BASE_ADDRESS_SPACE_MEMORY;
flags |= upper_32_bits(epf_bar->size) ?
epf_bar->flags |= upper_32_bits(epf_bar->size) ?
PCI_BASE_ADDRESS_MEM_TYPE_64 :
PCI_BASE_ADDRESS_MEM_TYPE_32;
ret = pci_epc_set_bar(epc, epf->func_no, bar,
epf_bar->phys_addr,
epf_bar->size, flags);
ret = pci_epc_set_bar(epc, epf->func_no, epf_bar);
if (ret) {
pci_epf_free_space(epf, epf_test->reg[bar], bar);
dev_err(dev, "failed to set BAR%d\n", bar);

10
drivers/pci/endpoint/pci-epc-core.c
View File

@ -300,14 +300,12 @@ EXPORT_SYMBOL_GPL(pci_epc_clear_bar);
* pci_epc_set_bar() - configure BAR in order for host to assign PCI addr space
* @epc: the EPC device on which BAR has to be configured
* @func_no: the endpoint function number in the EPC device
* @bar: the BAR number that has to be configured
* @size: the size of the addr space
* @flags: specify memory allocation/io allocation/32bit address/64 bit address
* @epf_bar: the struct epf_bar that contains the BAR information
*
* Invoke to configure the BAR of the endpoint device.
*/
int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, enum pci_barno bar,
dma_addr_t bar_phys, size_t size, int flags)
int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
struct pci_epf_bar *epf_bar)
{
int ret;
unsigned long irq_flags;
@ -319,7 +317,7 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, enum pci_barno bar,
return 0;
spin_lock_irqsave(&epc->lock, irq_flags);
ret = epc->ops->set_bar(epc, func_no, bar, bar_phys, size, flags);
ret = epc->ops->set_bar(epc, func_no, epf_bar);
spin_unlock_irqrestore(&epc->lock, irq_flags);
return ret;

4
drivers/pci/endpoint/pci-epf-core.c
View File

@ -98,6 +98,8 @@ void pci_epf_free_space(struct pci_epf *epf, void *addr, enum pci_barno bar)
epf->bar[bar].phys_addr = 0;
epf->bar[bar].size = 0;
epf->bar[bar].barno = 0;
epf->bar[bar].flags = 0;
}
EXPORT_SYMBOL_GPL(pci_epf_free_space);
@ -126,6 +128,8 @@ void *pci_epf_alloc_space(struct pci_epf *epf, size_t size, enum pci_barno bar)
epf->bar[bar].phys_addr = phys_addr;
epf->bar[bar].size = size;
epf->bar[bar].barno = bar;
epf->bar[bar].flags = PCI_BASE_ADDRESS_SPACE_MEMORY;
return space;
}

6
include/linux/pci-epc.h
View File

@ -39,8 +39,7 @@ struct pci_epc_ops {
int (*write_header)(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);
int (*set_bar)(struct pci_epc *epc, u8 func_no,
enum pci_barno bar,
dma_addr_t bar_phys, size_t size, int flags);
struct pci_epf_bar *epf_bar);
void (*clear_bar)(struct pci_epc *epc, u8 func_no,
enum pci_barno bar);
int (*map_addr)(struct pci_epc *epc, u8 func_no,
@ -127,8 +126,7 @@ void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
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,
enum pci_barno bar,
dma_addr_t bar_phys, size_t size, int flags);
struct pci_epf_bar *epf_bar);
void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar);
int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr,

2
include/linux/pci-epf.h
View File

@ -97,6 +97,8 @@ struct pci_epf_driver {
struct pci_epf_bar {
dma_addr_t phys_addr;
size_t size;
enum pci_barno barno;
int flags;
};
/**