From 3a8f77e48666a39adb3ac4d5ce8261563e039e31 Mon Sep 17 00:00:00 2001 From: Cyrille Pitchen Date: Tue, 30 Jan 2018 21:56:50 +0100 Subject: PCI: OF: Add generic function to parse and allocate PCI resources The patch moves the gen_pci_parse_request_of_pci_ranges() function from drivers/pci/host/pci-host-common.c into drivers/pci/of.c to easily share common source code between PCI host drivers. Signed-off-by: Cyrille Pitchen Signed-off-by: Lorenzo Pieralisi --- include/linux/pci.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include') diff --git a/include/linux/pci.h b/include/linux/pci.h index c170c9250c8b..c7a701abbf17 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2182,6 +2182,9 @@ void pci_release_of_node(struct pci_dev *dev); void pci_set_bus_of_node(struct pci_bus *bus); void pci_release_bus_of_node(struct pci_bus *bus); struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus); +int pci_parse_request_of_pci_ranges(struct device *dev, + struct list_head *resources, + struct resource **bus_range); /* Arch may override this (weak) */ struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus); @@ -2206,6 +2209,12 @@ static inline struct device_node * pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; } static inline struct irq_domain * pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; } +static inline int pci_parse_request_of_pci_ranges(struct device *dev, + struct list_head *resources, + struct resource **bus_range) +{ + return -EINVAL; +} #endif /* CONFIG_OF */ #ifdef CONFIG_ACPI -- cgit v1.3-14-g43fede From 49b8e3f3ed1d411a8f8fa5fbe72c88f3d1d43824 Mon Sep 17 00:00:00 2001 From: Cyrille Pitchen Date: Tue, 30 Jan 2018 21:56:52 +0100 Subject: PCI: Add generic function to probe PCI host controllers This patchs moves generic source code from drivers/pci/host/pci-host-common.c into drivers/pci/probe.c. Indeed the extracted lines of code were duplicated by many host controller drivers. Regrouping them into a generic function gives a change to properly share this code without introducing a useless dependency to PCI_HOST_COMMON, which selects PCI_ECAM when not needed by most host controller drivers. Signed-off-by: Cyrille Pitchen Signed-off-by: Lorenzo Pieralisi --- drivers/pci/host/pci-host-common.c | 22 +--------------------- drivers/pci/probe.c | 33 +++++++++++++++++++++++++++++++++ include/linux/pci.h | 1 + 3 files changed, 35 insertions(+), 21 deletions(-) (limited to 'include') diff --git a/drivers/pci/host/pci-host-common.c b/drivers/pci/host/pci-host-common.c index 10e3f5b39499..160b3c1cb5a0 100644 --- a/drivers/pci/host/pci-host-common.c +++ b/drivers/pci/host/pci-host-common.c @@ -72,7 +72,6 @@ int pci_host_common_probe(struct platform_device *pdev, const char *type; struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; - struct pci_bus *bus, *child; struct pci_host_bridge *bridge; struct pci_config_window *cfg; struct list_head resources; @@ -107,30 +106,11 @@ int pci_host_common_probe(struct platform_device *pdev, bridge->map_irq = of_irq_parse_and_map_pci; bridge->swizzle_irq = pci_common_swizzle; - ret = pci_scan_root_bus_bridge(bridge); + ret = pci_host_probe(bridge); if (ret < 0) { - dev_err(dev, "Scanning root bridge failed"); pci_free_resource_list(&resources); return ret; } - bus = bridge->bus; - - /* - * We insert PCI resources into the iomem_resource and - * ioport_resource trees in either pci_bus_claim_resources() - * or pci_bus_assign_resources(). - */ - if (pci_has_flag(PCI_PROBE_ONLY)) { - pci_bus_claim_resources(bus); - } else { - pci_bus_size_bridges(bus); - pci_bus_assign_resources(bus); - - list_for_each_entry(child, &bus->children, node) - pcie_bus_configure_settings(child); - } - - pci_bus_add_devices(bus); return 0; } diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 14e0ea1ff38b..a42bbfc5f2ec 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2620,6 +2620,39 @@ err_out: } EXPORT_SYMBOL_GPL(pci_create_root_bus); +int pci_host_probe(struct pci_host_bridge *bridge) +{ + struct pci_bus *bus, *child; + int ret; + + ret = pci_scan_root_bus_bridge(bridge); + if (ret < 0) { + dev_err(bridge->dev.parent, "Scanning root bridge failed"); + return ret; + } + + bus = bridge->bus; + + /* + * We insert PCI resources into the iomem_resource and + * ioport_resource trees in either pci_bus_claim_resources() + * or pci_bus_assign_resources(). + */ + if (pci_has_flag(PCI_PROBE_ONLY)) { + pci_bus_claim_resources(bus); + } else { + pci_bus_size_bridges(bus); + pci_bus_assign_resources(bus); + + list_for_each_entry(child, &bus->children, node) + pcie_bus_configure_settings(child); + } + + pci_bus_add_devices(bus); + return 0; +} +EXPORT_SYMBOL_GPL(pci_host_probe); + int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max) { struct resource *res = &b->busn_res; diff --git a/include/linux/pci.h b/include/linux/pci.h index c7a701abbf17..db6700137bd2 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -887,6 +887,7 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata); struct pci_bus *pci_create_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources); +int pci_host_probe(struct pci_host_bridge *bridge); int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax); int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax); void pci_bus_release_busn_res(struct pci_bus *b); -- cgit v1.3-14-g43fede From 74b307012ff7ea9f8dffd5a44c83a5e8ec44ca0a Mon Sep 17 00:00:00 2001 From: Cyrille Pitchen Date: Tue, 30 Jan 2018 21:56:53 +0100 Subject: PCI: Add vendor ID for Cadence This patch adds a new PCI vendor ID for Cadence. Signed-off-by: Cyrille Pitchen Signed-off-by: Lorenzo Pieralisi --- include/linux/pci_ids.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index ab20dc5db423..eb13e84e1fef 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -2381,6 +2381,8 @@ #define PCI_VENDOR_ID_LENOVO 0x17aa +#define PCI_VENDOR_ID_CDNS 0x17cd + #define PCI_VENDOR_ID_ARECA 0x17d3 #define PCI_DEVICE_ID_ARECA_1110 0x1110 #define PCI_DEVICE_ID_ARECA_1120 0x1120 -- cgit v1.3-14-g43fede From 4494738de0d9dc79343fba7c8a57235e684fc549 Mon Sep 17 00:00:00 2001 From: Cyrille Pitchen Date: Tue, 30 Jan 2018 21:56:56 +0100 Subject: 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 Signed-off-by: Lorenzo Pieralisi --- drivers/pci/dwc/pcie-designware-ep.c | 20 +++++---- drivers/pci/endpoint/functions/pci-epf-test.c | 41 ++++++++++-------- drivers/pci/endpoint/pci-epc-core.c | 62 ++++++++++++++++----------- include/linux/pci-epc.h | 43 +++++++++++-------- 4 files changed, 96 insertions(+), 70 deletions(-) (limited to 'include') diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-designware-ep.c index d53d5f168363..7a573d8bb62d 100644 --- a/drivers/pci/dwc/pcie-designware-ep.c +++ b/drivers/pci/dwc/pcie-designware-ep.c @@ -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); diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index f9308c2f22e6..7bacca8daec6 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -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; diff --git a/drivers/pci/endpoint/pci-epc-core.c b/drivers/pci/endpoint/pci-epc-core.c index 42c2a1156325..e8908e0792ad 100644 --- a/drivers/pci/endpoint/pci-epc-core.c +++ b/drivers/pci/endpoint/pci-epc-core.c @@ -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; diff --git a/include/linux/pci-epc.h b/include/linux/pci-epc.h index f7a04e1af112..e58e2de8936b 100644 --- a/include/linux/pci-epc.h +++ b/include/linux/pci-epc.h @@ -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); -- cgit v1.3-14-g43fede