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PCI: endpoint: Add the function number as argument to EPC ops 

This patch updates the prototype of most handlers from 'struct
pci_epc_ops' so the EPC library can now support multi-function devices.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@free-electrons.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Cyrille Pitchen 2018-01-30 21:56:56 +01:00 committed by Lorenzo Pieralisi
parent 1b79c52844
commit 4494738de0
4 changed files with 96 additions and 70 deletions
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20
drivers/pci/dwc/pcie-designware-ep.c
View File

@ -39,7 +39,7 @@ static void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
dw_pcie_writel_dbi(pci, reg, 0x0);
}
static int dw_pcie_ep_write_header(struct pci_epc *epc,
static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
@ -112,7 +112,8 @@ static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, phys_addr_t phys_addr,
return 0;
}
static void dw_pcie_ep_clear_bar(struct pci_epc *epc, enum pci_barno bar)
static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
enum pci_barno bar)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
@ -124,7 +125,8 @@ static void dw_pcie_ep_clear_bar(struct pci_epc *epc, enum pci_barno bar)
clear_bit(atu_index, &ep->ib_window_map);
}
static int dw_pcie_ep_set_bar(struct pci_epc *epc, enum pci_barno bar,
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)
{
int ret;
@ -163,7 +165,8 @@ static int dw_pcie_find_index(struct dw_pcie_ep *ep, phys_addr_t addr,
return -EINVAL;
}
static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, phys_addr_t addr)
static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t addr)
{
int ret;
u32 atu_index;
@ -178,7 +181,8 @@ static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, phys_addr_t addr)
clear_bit(atu_index, &ep->ob_window_map);
}
static int dw_pcie_ep_map_addr(struct pci_epc *epc, phys_addr_t addr,
static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t addr,
u64 pci_addr, size_t size)
{
int ret;
@ -194,7 +198,7 @@ static int dw_pcie_ep_map_addr(struct pci_epc *epc, phys_addr_t addr,
return 0;
}
static int dw_pcie_ep_get_msi(struct pci_epc *epc)
static int dw_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no)
{
int val;
u32 lower_addr;
@ -214,7 +218,7 @@ static int dw_pcie_ep_get_msi(struct pci_epc *epc)
return val;
}
static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 encode_int)
static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 encode_int)
{
int val;
struct dw_pcie_ep *ep = epc_get_drvdata(epc);
@ -226,7 +230,7 @@ static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 encode_int)
return 0;
}
static int dw_pcie_ep_raise_irq(struct pci_epc *epc,
static int dw_pcie_ep_raise_irq(struct pci_epc *epc, u8 func_no,
enum pci_epc_irq_type type, u8 interrupt_num)
{
struct dw_pcie_ep *ep = epc_get_drvdata(epc);

41
drivers/pci/endpoint/functions/pci-epf-test.c
View File

@ -104,7 +104,8 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
goto err;
}
ret = pci_epc_map_addr(epc, src_phys_addr, reg->src_addr, reg->size);
ret = pci_epc_map_addr(epc, epf->func_no, src_phys_addr, reg->src_addr,
reg->size);
if (ret) {
dev_err(dev, "failed to map source address\n");
reg->status = STATUS_SRC_ADDR_INVALID;
@ -119,7 +120,8 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
goto err_src_map_addr;
}
ret = pci_epc_map_addr(epc, dst_phys_addr, reg->dst_addr, reg->size);
ret = pci_epc_map_addr(epc, epf->func_no, dst_phys_addr, reg->dst_addr,
reg->size);
if (ret) {
dev_err(dev, "failed to map destination address\n");
reg->status = STATUS_DST_ADDR_INVALID;
@ -128,13 +130,13 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
memcpy(dst_addr, src_addr, reg->size);
pci_epc_unmap_addr(epc, dst_phys_addr);
pci_epc_unmap_addr(epc, epf->func_no, dst_phys_addr);
err_dst_addr:
pci_epc_mem_free_addr(epc, dst_phys_addr, dst_addr, reg->size);
err_src_map_addr:
pci_epc_unmap_addr(epc, src_phys_addr);
pci_epc_unmap_addr(epc, epf->func_no, src_phys_addr);
err_src_addr:
pci_epc_mem_free_addr(epc, src_phys_addr, src_addr, reg->size);
@ -164,7 +166,8 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test)
goto err;
}
ret = pci_epc_map_addr(epc, phys_addr, reg->src_addr, reg->size);
ret = pci_epc_map_addr(epc, epf->func_no, phys_addr, reg->src_addr,
reg->size);
if (ret) {
dev_err(dev, "failed to map address\n");
reg->status = STATUS_SRC_ADDR_INVALID;
@ -186,7 +189,7 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test)
kfree(buf);
err_map_addr:
pci_epc_unmap_addr(epc, phys_addr);
pci_epc_unmap_addr(epc, epf->func_no, phys_addr);
err_addr:
pci_epc_mem_free_addr(epc, phys_addr, src_addr, reg->size);
@ -215,7 +218,8 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
goto err;
}
ret = pci_epc_map_addr(epc, phys_addr, reg->dst_addr, reg->size);
ret = pci_epc_map_addr(epc, epf->func_no, phys_addr, reg->dst_addr,
reg->size);
if (ret) {
dev_err(dev, "failed to map address\n");
reg->status = STATUS_DST_ADDR_INVALID;
@ -242,7 +246,7 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
kfree(buf);
err_map_addr:
pci_epc_unmap_addr(epc, phys_addr);
pci_epc_unmap_addr(epc, epf->func_no, phys_addr);
err_addr:
pci_epc_mem_free_addr(epc, phys_addr, dst_addr, reg->size);
@ -260,11 +264,11 @@ static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test, u8 irq)
struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar];
reg->status |= STATUS_IRQ_RAISED;
msi_count = pci_epc_get_msi(epc);
msi_count = pci_epc_get_msi(epc, epf->func_no);
if (irq > msi_count || msi_count <= 0)
pci_epc_raise_irq(epc, PCI_EPC_IRQ_LEGACY, 0);
pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_LEGACY, 0);
else
pci_epc_raise_irq(epc, PCI_EPC_IRQ_MSI, irq);
pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, irq);
}
static void pci_epf_test_cmd_handler(struct work_struct *work)
@ -291,7 +295,7 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
if (command & COMMAND_RAISE_LEGACY_IRQ) {
reg->status = STATUS_IRQ_RAISED;
pci_epc_raise_irq(epc, PCI_EPC_IRQ_LEGACY, 0);
pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_LEGACY, 0);
goto reset_handler;
}
@ -326,11 +330,11 @@ static void pci_epf_test_cmd_handler(struct work_struct *work)
}
if (command & COMMAND_RAISE_MSI_IRQ) {
msi_count = pci_epc_get_msi(epc);
msi_count = pci_epc_get_msi(epc, epf->func_no);
if (irq > msi_count || msi_count <= 0)
goto reset_handler;
reg->status = STATUS_IRQ_RAISED;
pci_epc_raise_irq(epc, PCI_EPC_IRQ_MSI, irq);
pci_epc_raise_irq(epc, epf->func_no, PCI_EPC_IRQ_MSI, irq);
goto reset_handler;
}
@ -358,7 +362,7 @@ static void pci_epf_test_unbind(struct pci_epf *epf)
for (bar = BAR_0; bar <= BAR_5; bar++) {
if (epf_test->reg[bar]) {
pci_epf_free_space(epf, epf_test->reg[bar], bar);
pci_epc_clear_bar(epc, bar);
pci_epc_clear_bar(epc, epf->func_no, bar);
}
}
}
@ -380,7 +384,8 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
for (bar = BAR_0; bar <= BAR_5; bar++) {
epf_bar = &epf->bar[bar];
ret = pci_epc_set_bar(epc, bar, epf_bar->phys_addr,
ret = pci_epc_set_bar(epc, epf->func_no, bar,
epf_bar->phys_addr,
epf_bar->size, flags);
if (ret) {
pci_epf_free_space(epf, epf_test->reg[bar], bar);
@ -433,7 +438,7 @@ static int pci_epf_test_bind(struct pci_epf *epf)
if (WARN_ON_ONCE(!epc))
return -EINVAL;
ret = pci_epc_write_header(epc, header);
ret = pci_epc_write_header(epc, epf->func_no, header);
if (ret) {
dev_err(dev, "configuration header write failed\n");
return ret;
@ -447,7 +452,7 @@ static int pci_epf_test_bind(struct pci_epf *epf)
if (ret)
return ret;
ret = pci_epc_set_msi(epc, epf->msi_interrupts);
ret = pci_epc_set_msi(epc, epf->func_no, epf->msi_interrupts);
if (ret)
return ret;

62
drivers/pci/endpoint/pci-epc-core.c
View File

@ -142,25 +142,26 @@ EXPORT_SYMBOL_GPL(pci_epc_start);
/**
* pci_epc_raise_irq() - interrupt the host system
* @epc: the EPC device which has to interrupt the host
* @func_no: the endpoint function number in the EPC device
* @type: specify the type of interrupt; legacy or MSI
* @interrupt_num: the MSI interrupt number
*
* Invoke to raise an MSI or legacy interrupt
*/
int pci_epc_raise_irq(struct pci_epc *epc, enum pci_epc_irq_type type,
u8 interrupt_num)
int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
enum pci_epc_irq_type type, u8 interrupt_num)
{
int ret;
unsigned long flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
if (!epc->ops->raise_irq)
return 0;
spin_lock_irqsave(&epc->lock, flags);
ret = epc->ops->raise_irq(epc, type, interrupt_num);
ret = epc->ops->raise_irq(epc, func_no, type, interrupt_num);
spin_unlock_irqrestore(&epc->lock, flags);
return ret;
@ -170,22 +171,23 @@ EXPORT_SYMBOL_GPL(pci_epc_raise_irq);
/**
* pci_epc_get_msi() - get the number of MSI interrupt numbers allocated
* @epc: the EPC device to which MSI interrupts was requested
* @func_no: the endpoint function number in the EPC device
*
* Invoke to get the number of MSI interrupts allocated by the RC
*/
int pci_epc_get_msi(struct pci_epc *epc)
int pci_epc_get_msi(struct pci_epc *epc, u8 func_no)
{
int interrupt;
unsigned long flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return 0;
if (!epc->ops->get_msi)
return 0;
spin_lock_irqsave(&epc->lock, flags);
interrupt = epc->ops->get_msi(epc);
interrupt = epc->ops->get_msi(epc, func_no);
spin_unlock_irqrestore(&epc->lock, flags);
if (interrupt < 0)
@ -200,17 +202,18 @@ EXPORT_SYMBOL_GPL(pci_epc_get_msi);
/**
* pci_epc_set_msi() - set the number of MSI interrupt numbers required
* @epc: the EPC device on which MSI has to be configured
* @func_no: the endpoint function number in the EPC device
* @interrupts: number of MSI interrupts required by the EPF
*
* Invoke to set the required number of MSI interrupts.
*/
int pci_epc_set_msi(struct pci_epc *epc, u8 interrupts)
int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
{
int ret;
u8 encode_int;
unsigned long flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
if (!epc->ops->set_msi)
@ -219,7 +222,7 @@ int pci_epc_set_msi(struct pci_epc *epc, u8 interrupts)
encode_int = order_base_2(interrupts);
spin_lock_irqsave(&epc->lock, flags);
ret = epc->ops->set_msi(epc, encode_int);
ret = epc->ops->set_msi(epc, func_no, encode_int);
spin_unlock_irqrestore(&epc->lock, flags);
return ret;
@ -229,22 +232,24 @@ EXPORT_SYMBOL_GPL(pci_epc_set_msi);
/**
* pci_epc_unmap_addr() - unmap CPU address from PCI address
* @epc: the EPC device on which address is allocated
* @func_no: the endpoint function number in the EPC device
* @phys_addr: physical address of the local system
*
* Invoke to unmap the CPU address from PCI address.
*/
void pci_epc_unmap_addr(struct pci_epc *epc, phys_addr_t phys_addr)
void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr)
{
unsigned long flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return;
if (!epc->ops->unmap_addr)
return;
spin_lock_irqsave(&epc->lock, flags);
epc->ops->unmap_addr(epc, phys_addr);
epc->ops->unmap_addr(epc, func_no, phys_addr);
spin_unlock_irqrestore(&epc->lock, flags);
}
EXPORT_SYMBOL_GPL(pci_epc_unmap_addr);
@ -252,26 +257,27 @@ EXPORT_SYMBOL_GPL(pci_epc_unmap_addr);
/**
* pci_epc_map_addr() - map CPU address to PCI address
* @epc: the EPC device on which address is allocated
* @func_no: the endpoint function number in the EPC device
* @phys_addr: physical address of the local system
* @pci_addr: PCI address to which the physical address should be mapped
* @size: the size of the allocation
*
* Invoke to map CPU address with PCI address.
*/
int pci_epc_map_addr(struct pci_epc *epc, phys_addr_t phys_addr,
u64 pci_addr, size_t size)
int pci_epc_map_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr, u64 pci_addr, size_t size)
{
int ret;
unsigned long flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
if (!epc->ops->map_addr)
return 0;
spin_lock_irqsave(&epc->lock, flags);
ret = epc->ops->map_addr(epc, phys_addr, pci_addr, size);
ret = epc->ops->map_addr(epc, func_no, phys_addr, pci_addr, size);
spin_unlock_irqrestore(&epc->lock, flags);
return ret;
@ -281,22 +287,23 @@ 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
*
* Invoke to reset the BAR of the endpoint device.
*/
void pci_epc_clear_bar(struct pci_epc *epc, int bar)
void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, int bar)
{
unsigned long flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return;
if (!epc->ops->clear_bar)
return;
spin_lock_irqsave(&epc->lock, flags);
epc->ops->clear_bar(epc, bar);
epc->ops->clear_bar(epc, func_no, bar);
spin_unlock_irqrestore(&epc->lock, flags);
}
EXPORT_SYMBOL_GPL(pci_epc_clear_bar);
@ -304,26 +311,27 @@ 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
*
* Invoke to configure the BAR of the endpoint device.
*/
int pci_epc_set_bar(struct pci_epc *epc, enum pci_barno bar,
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 ret;
unsigned long irq_flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
if (!epc->ops->set_bar)
return 0;
spin_lock_irqsave(&epc->lock, irq_flags);
ret = epc->ops->set_bar(epc, bar, bar_phys, size, flags);
ret = epc->ops->set_bar(epc, func_no, bar, bar_phys, size, flags);
spin_unlock_irqrestore(&epc->lock, irq_flags);
return ret;
@ -333,6 +341,7 @@ EXPORT_SYMBOL_GPL(pci_epc_set_bar);
/**
* pci_epc_write_header() - write standard configuration header
* @epc: the EPC device to which the configuration header should be written
* @func_no: the endpoint function number in the EPC device
* @header: standard configuration header fields
*
* Invoke to write the configuration header to the endpoint controller. Every
@ -340,19 +349,20 @@ EXPORT_SYMBOL_GPL(pci_epc_set_bar);
* configuration header would be written. The callback function should write
* the header fields to this dedicated location.
*/
int pci_epc_write_header(struct pci_epc *epc, struct pci_epf_header *header)
int pci_epc_write_header(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *header)
{
int ret;
unsigned long flags;
if (IS_ERR(epc))
if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions)
return -EINVAL;
if (!epc->ops->write_header)
return 0;
spin_lock_irqsave(&epc->lock, flags);
ret = epc->ops->write_header(epc, header);
ret = epc->ops->write_header(epc, func_no, header);
spin_unlock_irqrestore(&epc->lock, flags);
return ret;

43
include/linux/pci-epc.h
View File

@ -39,17 +39,20 @@ enum pci_epc_irq_type {
* @owner: the module owner containing the ops
*/
struct pci_epc_ops {
int (*write_header)(struct pci_epc *pci_epc,
int (*write_header)(struct pci_epc *epc, u8 func_no,
struct pci_epf_header *hdr);
int (*set_bar)(struct pci_epc *epc, enum pci_barno bar,
int (*set_bar)(struct pci_epc *epc, u8 func_no,
enum pci_barno bar,
dma_addr_t bar_phys, size_t size, int flags);
void (*clear_bar)(struct pci_epc *epc, enum pci_barno bar);
int (*map_addr)(struct pci_epc *epc, phys_addr_t addr,
u64 pci_addr, size_t size);
void (*unmap_addr)(struct pci_epc *epc, phys_addr_t addr);
int (*set_msi)(struct pci_epc *epc, u8 interrupts);
int (*get_msi)(struct pci_epc *epc);
int (*raise_irq)(struct pci_epc *pci_epc,
void (*clear_bar)(struct pci_epc *epc, u8 func_no,
enum pci_barno 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,
phys_addr_t addr);
int (*set_msi)(struct pci_epc *epc, u8 func_no, u8 interrupts);
int (*get_msi)(struct pci_epc *epc, u8 func_no);
int (*raise_irq)(struct pci_epc *epc, u8 func_no,
enum pci_epc_irq_type type, u8 interrupt_num);
int (*start)(struct pci_epc *epc);
void (*stop)(struct pci_epc *epc);
@ -124,17 +127,21 @@ void pci_epc_destroy(struct pci_epc *epc);
int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf);
void pci_epc_linkup(struct pci_epc *epc);
void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf);
int pci_epc_write_header(struct pci_epc *epc, struct pci_epf_header *hdr);
int pci_epc_set_bar(struct pci_epc *epc, enum pci_barno bar,
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);
void pci_epc_clear_bar(struct pci_epc *epc, int bar);
int pci_epc_map_addr(struct pci_epc *epc, phys_addr_t phys_addr,
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,
u64 pci_addr, size_t size);
void pci_epc_unmap_addr(struct pci_epc *epc, phys_addr_t phys_addr);
int pci_epc_set_msi(struct pci_epc *epc, u8 interrupts);
int pci_epc_get_msi(struct pci_epc *epc);
int pci_epc_raise_irq(struct pci_epc *epc, enum pci_epc_irq_type type,
u8 interrupt_num);
void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no,
phys_addr_t phys_addr);
int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts);
int pci_epc_get_msi(struct pci_epc *epc, u8 func_no);
int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no,
enum pci_epc_irq_type type, u8 interrupt_num);
int pci_epc_start(struct pci_epc *epc);
void pci_epc_stop(struct pci_epc *epc);
struct pci_epc *pci_epc_get(const char *epc_name);