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Commit 4494738d authored by Cyrille Pitchen's avatar Cyrille Pitchen Committed by Lorenzo Pieralisi
Browse files

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: default avatarCyrille Pitchen <cyrille.pitchen@free-electrons.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
parent 1b79c528

drivers/pci/dwc/pcie-designware-ep.c

+12 −8
Original line number Diff line number Diff line
@@ -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);

drivers/pci/endpoint/functions/pci-epf-test.c

+23 −18
Original line number Diff line number Diff line
@@ -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;

drivers/pci/endpoint/pci-epc-core.c

+36 −26
Original line number Diff line number Diff line
@@ -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;

include/linux/pci-epc.h

+25 −18
Original line number Diff line number Diff line
@@ -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);