18cfab3cfSBjorn Helgaas // SPDX-License-Identifier: GPL-2.0 29b41d19aSKrzysztof Kozlowski /* 35e8cb403SKishon Vijay Abraham I * PCI Endpoint *Controller* (EPC) library 45e8cb403SKishon Vijay Abraham I * 55e8cb403SKishon Vijay Abraham I * Copyright (C) 2017 Texas Instruments 65e8cb403SKishon Vijay Abraham I * Author: Kishon Vijay Abraham I <kishon@ti.com> 75e8cb403SKishon Vijay Abraham I */ 85e8cb403SKishon Vijay Abraham I 95e8cb403SKishon Vijay Abraham I #include <linux/device.h> 105e8cb403SKishon Vijay Abraham I #include <linux/slab.h> 115e8cb403SKishon Vijay Abraham I #include <linux/module.h> 1264c1a02aSKishon Vijay Abraham I #include <linux/of_device.h> 135e8cb403SKishon Vijay Abraham I 145e8cb403SKishon Vijay Abraham I #include <linux/pci-epc.h> 155e8cb403SKishon Vijay Abraham I #include <linux/pci-epf.h> 163a401a2cSKishon Vijay Abraham I #include <linux/pci-ep-cfs.h> 175e8cb403SKishon Vijay Abraham I 185e8cb403SKishon Vijay Abraham I static struct class *pci_epc_class; 195e8cb403SKishon Vijay Abraham I 205e8cb403SKishon Vijay Abraham I static void devm_pci_epc_release(struct device *dev, void *res) 215e8cb403SKishon Vijay Abraham I { 225e8cb403SKishon Vijay Abraham I struct pci_epc *epc = *(struct pci_epc **)res; 235e8cb403SKishon Vijay Abraham I 245e8cb403SKishon Vijay Abraham I pci_epc_destroy(epc); 255e8cb403SKishon Vijay Abraham I } 265e8cb403SKishon Vijay Abraham I 275e8cb403SKishon Vijay Abraham I static int devm_pci_epc_match(struct device *dev, void *res, void *match_data) 285e8cb403SKishon Vijay Abraham I { 295e8cb403SKishon Vijay Abraham I struct pci_epc **epc = res; 305e8cb403SKishon Vijay Abraham I 315e8cb403SKishon Vijay Abraham I return *epc == match_data; 325e8cb403SKishon Vijay Abraham I } 335e8cb403SKishon Vijay Abraham I 345e8cb403SKishon Vijay Abraham I /** 355e8cb403SKishon Vijay Abraham I * pci_epc_put() - release the PCI endpoint controller 365e8cb403SKishon Vijay Abraham I * @epc: epc returned by pci_epc_get() 375e8cb403SKishon Vijay Abraham I * 385e8cb403SKishon Vijay Abraham I * release the refcount the caller obtained by invoking pci_epc_get() 395e8cb403SKishon Vijay Abraham I */ 405e8cb403SKishon Vijay Abraham I void pci_epc_put(struct pci_epc *epc) 415e8cb403SKishon Vijay Abraham I { 425e8cb403SKishon Vijay Abraham I if (!epc || IS_ERR(epc)) 435e8cb403SKishon Vijay Abraham I return; 445e8cb403SKishon Vijay Abraham I 455e8cb403SKishon Vijay Abraham I module_put(epc->ops->owner); 465e8cb403SKishon Vijay Abraham I put_device(&epc->dev); 475e8cb403SKishon Vijay Abraham I } 485e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_put); 495e8cb403SKishon Vijay Abraham I 505e8cb403SKishon Vijay Abraham I /** 515e8cb403SKishon Vijay Abraham I * pci_epc_get() - get the PCI endpoint controller 525e8cb403SKishon Vijay Abraham I * @epc_name: device name of the endpoint controller 535e8cb403SKishon Vijay Abraham I * 545e8cb403SKishon Vijay Abraham I * Invoke to get struct pci_epc * corresponding to the device name of the 555e8cb403SKishon Vijay Abraham I * endpoint controller 565e8cb403SKishon Vijay Abraham I */ 575e8cb403SKishon Vijay Abraham I struct pci_epc *pci_epc_get(const char *epc_name) 585e8cb403SKishon Vijay Abraham I { 595e8cb403SKishon Vijay Abraham I int ret = -EINVAL; 605e8cb403SKishon Vijay Abraham I struct pci_epc *epc; 615e8cb403SKishon Vijay Abraham I struct device *dev; 625e8cb403SKishon Vijay Abraham I struct class_dev_iter iter; 635e8cb403SKishon Vijay Abraham I 645e8cb403SKishon Vijay Abraham I class_dev_iter_init(&iter, pci_epc_class, NULL, NULL); 655e8cb403SKishon Vijay Abraham I while ((dev = class_dev_iter_next(&iter))) { 665e8cb403SKishon Vijay Abraham I if (strcmp(epc_name, dev_name(dev))) 675e8cb403SKishon Vijay Abraham I continue; 685e8cb403SKishon Vijay Abraham I 695e8cb403SKishon Vijay Abraham I epc = to_pci_epc(dev); 705e8cb403SKishon Vijay Abraham I if (!try_module_get(epc->ops->owner)) { 715e8cb403SKishon Vijay Abraham I ret = -EINVAL; 725e8cb403SKishon Vijay Abraham I goto err; 735e8cb403SKishon Vijay Abraham I } 745e8cb403SKishon Vijay Abraham I 755e8cb403SKishon Vijay Abraham I class_dev_iter_exit(&iter); 765e8cb403SKishon Vijay Abraham I get_device(&epc->dev); 775e8cb403SKishon Vijay Abraham I return epc; 785e8cb403SKishon Vijay Abraham I } 795e8cb403SKishon Vijay Abraham I 805e8cb403SKishon Vijay Abraham I err: 815e8cb403SKishon Vijay Abraham I class_dev_iter_exit(&iter); 825e8cb403SKishon Vijay Abraham I return ERR_PTR(ret); 835e8cb403SKishon Vijay Abraham I } 845e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_get); 855e8cb403SKishon Vijay Abraham I 865e8cb403SKishon Vijay Abraham I /** 871e9efe6cSKishon Vijay Abraham I * pci_epc_get_first_free_bar() - helper to get first unreserved BAR 881e9efe6cSKishon Vijay Abraham I * @epc_features: pci_epc_features structure that holds the reserved bar bitmap 891e9efe6cSKishon Vijay Abraham I * 90fa8fef0eSKishon Vijay Abraham I * Invoke to get the first unreserved BAR that can be used by the endpoint 911e9efe6cSKishon Vijay Abraham I * function. For any incorrect value in reserved_bar return '0'. 921e9efe6cSKishon Vijay Abraham I */ 93*0e27aeccSKishon Vijay Abraham I enum pci_barno 94*0e27aeccSKishon Vijay Abraham I pci_epc_get_first_free_bar(const struct pci_epc_features *epc_features) 951e9efe6cSKishon Vijay Abraham I { 96fa8fef0eSKishon Vijay Abraham I return pci_epc_get_next_free_bar(epc_features, BAR_0); 97fa8fef0eSKishon Vijay Abraham I } 98fa8fef0eSKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_get_first_free_bar); 99fa8fef0eSKishon Vijay Abraham I 100fa8fef0eSKishon Vijay Abraham I /** 101fa8fef0eSKishon Vijay Abraham I * pci_epc_get_next_free_bar() - helper to get unreserved BAR starting from @bar 102fa8fef0eSKishon Vijay Abraham I * @epc_features: pci_epc_features structure that holds the reserved bar bitmap 103fa8fef0eSKishon Vijay Abraham I * @bar: the starting BAR number from where unreserved BAR should be searched 104fa8fef0eSKishon Vijay Abraham I * 105fa8fef0eSKishon Vijay Abraham I * Invoke to get the next unreserved BAR starting from @bar that can be used 106fa8fef0eSKishon Vijay Abraham I * for endpoint function. For any incorrect value in reserved_bar return '0'. 107fa8fef0eSKishon Vijay Abraham I */ 108*0e27aeccSKishon Vijay Abraham I enum pci_barno pci_epc_get_next_free_bar(const struct pci_epc_features 109fa8fef0eSKishon Vijay Abraham I *epc_features, enum pci_barno bar) 110fa8fef0eSKishon Vijay Abraham I { 111959a48d0SKishon Vijay Abraham I unsigned long free_bar; 1121e9efe6cSKishon Vijay Abraham I 1131e9efe6cSKishon Vijay Abraham I if (!epc_features) 114*0e27aeccSKishon Vijay Abraham I return BAR_0; 1151e9efe6cSKishon Vijay Abraham I 116fa8fef0eSKishon Vijay Abraham I /* If 'bar - 1' is a 64-bit BAR, move to the next BAR */ 117fa8fef0eSKishon Vijay Abraham I if ((epc_features->bar_fixed_64bit << 1) & 1 << bar) 118fa8fef0eSKishon Vijay Abraham I bar++; 119fa8fef0eSKishon Vijay Abraham I 120959a48d0SKishon Vijay Abraham I /* Find if the reserved BAR is also a 64-bit BAR */ 121959a48d0SKishon Vijay Abraham I free_bar = epc_features->reserved_bar & epc_features->bar_fixed_64bit; 122959a48d0SKishon Vijay Abraham I 123959a48d0SKishon Vijay Abraham I /* Set the adjacent bit if the reserved BAR is also a 64-bit BAR */ 124959a48d0SKishon Vijay Abraham I free_bar <<= 1; 125959a48d0SKishon Vijay Abraham I free_bar |= epc_features->reserved_bar; 126959a48d0SKishon Vijay Abraham I 127fa8fef0eSKishon Vijay Abraham I free_bar = find_next_zero_bit(&free_bar, 6, bar); 1281e9efe6cSKishon Vijay Abraham I if (free_bar > 5) 129*0e27aeccSKishon Vijay Abraham I return NO_BAR; 1301e9efe6cSKishon Vijay Abraham I 1311e9efe6cSKishon Vijay Abraham I return free_bar; 1321e9efe6cSKishon Vijay Abraham I } 133fa8fef0eSKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_get_next_free_bar); 1341e9efe6cSKishon Vijay Abraham I 1351e9efe6cSKishon Vijay Abraham I /** 13641cb8d18SKishon Vijay Abraham I * pci_epc_get_features() - get the features supported by EPC 13741cb8d18SKishon Vijay Abraham I * @epc: the features supported by *this* EPC device will be returned 13841cb8d18SKishon Vijay Abraham I * @func_no: the features supported by the EPC device specific to the 13941cb8d18SKishon Vijay Abraham I * endpoint function with func_no will be returned 14041cb8d18SKishon Vijay Abraham I * 14141cb8d18SKishon Vijay Abraham I * Invoke to get the features provided by the EPC which may be 14241cb8d18SKishon Vijay Abraham I * specific to an endpoint function. Returns pci_epc_features on success 14341cb8d18SKishon Vijay Abraham I * and NULL for any failures. 14441cb8d18SKishon Vijay Abraham I */ 14541cb8d18SKishon Vijay Abraham I const struct pci_epc_features *pci_epc_get_features(struct pci_epc *epc, 14641cb8d18SKishon Vijay Abraham I u8 func_no) 14741cb8d18SKishon Vijay Abraham I { 14841cb8d18SKishon Vijay Abraham I const struct pci_epc_features *epc_features; 14941cb8d18SKishon Vijay Abraham I 15041cb8d18SKishon Vijay Abraham I if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) 15141cb8d18SKishon Vijay Abraham I return NULL; 15241cb8d18SKishon Vijay Abraham I 15341cb8d18SKishon Vijay Abraham I if (!epc->ops->get_features) 15441cb8d18SKishon Vijay Abraham I return NULL; 15541cb8d18SKishon Vijay Abraham I 1563d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 15741cb8d18SKishon Vijay Abraham I epc_features = epc->ops->get_features(epc, func_no); 1583d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 15941cb8d18SKishon Vijay Abraham I 16041cb8d18SKishon Vijay Abraham I return epc_features; 16141cb8d18SKishon Vijay Abraham I } 16241cb8d18SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_get_features); 16341cb8d18SKishon Vijay Abraham I 16441cb8d18SKishon Vijay Abraham I /** 1655e8cb403SKishon Vijay Abraham I * pci_epc_stop() - stop the PCI link 1665e8cb403SKishon Vijay Abraham I * @epc: the link of the EPC device that has to be stopped 1675e8cb403SKishon Vijay Abraham I * 1685e8cb403SKishon Vijay Abraham I * Invoke to stop the PCI link 1695e8cb403SKishon Vijay Abraham I */ 1705e8cb403SKishon Vijay Abraham I void pci_epc_stop(struct pci_epc *epc) 1715e8cb403SKishon Vijay Abraham I { 1725e8cb403SKishon Vijay Abraham I if (IS_ERR(epc) || !epc->ops->stop) 1735e8cb403SKishon Vijay Abraham I return; 1745e8cb403SKishon Vijay Abraham I 1753d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 1765e8cb403SKishon Vijay Abraham I epc->ops->stop(epc); 1773d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 1785e8cb403SKishon Vijay Abraham I } 1795e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_stop); 1805e8cb403SKishon Vijay Abraham I 1815e8cb403SKishon Vijay Abraham I /** 1825e8cb403SKishon Vijay Abraham I * pci_epc_start() - start the PCI link 1835e8cb403SKishon Vijay Abraham I * @epc: the link of *this* EPC device has to be started 1845e8cb403SKishon Vijay Abraham I * 1855e8cb403SKishon Vijay Abraham I * Invoke to start the PCI link 1865e8cb403SKishon Vijay Abraham I */ 1875e8cb403SKishon Vijay Abraham I int pci_epc_start(struct pci_epc *epc) 1885e8cb403SKishon Vijay Abraham I { 1895e8cb403SKishon Vijay Abraham I int ret; 1905e8cb403SKishon Vijay Abraham I 1915e8cb403SKishon Vijay Abraham I if (IS_ERR(epc)) 1925e8cb403SKishon Vijay Abraham I return -EINVAL; 1935e8cb403SKishon Vijay Abraham I 1945e8cb403SKishon Vijay Abraham I if (!epc->ops->start) 1955e8cb403SKishon Vijay Abraham I return 0; 1965e8cb403SKishon Vijay Abraham I 1973d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 1985e8cb403SKishon Vijay Abraham I ret = epc->ops->start(epc); 1993d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 2005e8cb403SKishon Vijay Abraham I 2015e8cb403SKishon Vijay Abraham I return ret; 2025e8cb403SKishon Vijay Abraham I } 2035e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_start); 2045e8cb403SKishon Vijay Abraham I 2055e8cb403SKishon Vijay Abraham I /** 2065e8cb403SKishon Vijay Abraham I * pci_epc_raise_irq() - interrupt the host system 2075e8cb403SKishon Vijay Abraham I * @epc: the EPC device which has to interrupt the host 2084494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 209d3c70a98SGustavo Pimentel * @type: specify the type of interrupt; legacy, MSI or MSI-X 210d3c70a98SGustavo Pimentel * @interrupt_num: the MSI or MSI-X interrupt number 2115e8cb403SKishon Vijay Abraham I * 212d3c70a98SGustavo Pimentel * Invoke to raise an legacy, MSI or MSI-X interrupt 2135e8cb403SKishon Vijay Abraham I */ 2144494738dSCyrille Pitchen int pci_epc_raise_irq(struct pci_epc *epc, u8 func_no, 215d3c70a98SGustavo Pimentel enum pci_epc_irq_type type, u16 interrupt_num) 2165e8cb403SKishon Vijay Abraham I { 2175e8cb403SKishon Vijay Abraham I int ret; 2185e8cb403SKishon Vijay Abraham I 2194494738dSCyrille Pitchen if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) 2205e8cb403SKishon Vijay Abraham I return -EINVAL; 2215e8cb403SKishon Vijay Abraham I 2225e8cb403SKishon Vijay Abraham I if (!epc->ops->raise_irq) 2235e8cb403SKishon Vijay Abraham I return 0; 2245e8cb403SKishon Vijay Abraham I 2253d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 2264494738dSCyrille Pitchen ret = epc->ops->raise_irq(epc, func_no, type, interrupt_num); 2273d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 2285e8cb403SKishon Vijay Abraham I 2295e8cb403SKishon Vijay Abraham I return ret; 2305e8cb403SKishon Vijay Abraham I } 2315e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_raise_irq); 2325e8cb403SKishon Vijay Abraham I 2335e8cb403SKishon Vijay Abraham I /** 2345e8cb403SKishon Vijay Abraham I * pci_epc_get_msi() - get the number of MSI interrupt numbers allocated 2355e8cb403SKishon Vijay Abraham I * @epc: the EPC device to which MSI interrupts was requested 2364494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 2375e8cb403SKishon Vijay Abraham I * 2385e8cb403SKishon Vijay Abraham I * Invoke to get the number of MSI interrupts allocated by the RC 2395e8cb403SKishon Vijay Abraham I */ 2404494738dSCyrille Pitchen int pci_epc_get_msi(struct pci_epc *epc, u8 func_no) 2415e8cb403SKishon Vijay Abraham I { 2425e8cb403SKishon Vijay Abraham I int interrupt; 2435e8cb403SKishon Vijay Abraham I 2444494738dSCyrille Pitchen if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) 2455e8cb403SKishon Vijay Abraham I return 0; 2465e8cb403SKishon Vijay Abraham I 2475e8cb403SKishon Vijay Abraham I if (!epc->ops->get_msi) 2485e8cb403SKishon Vijay Abraham I return 0; 2495e8cb403SKishon Vijay Abraham I 2503d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 2514494738dSCyrille Pitchen interrupt = epc->ops->get_msi(epc, func_no); 2523d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 2535e8cb403SKishon Vijay Abraham I 2545e8cb403SKishon Vijay Abraham I if (interrupt < 0) 2555e8cb403SKishon Vijay Abraham I return 0; 2565e8cb403SKishon Vijay Abraham I 2575e8cb403SKishon Vijay Abraham I interrupt = 1 << interrupt; 2585e8cb403SKishon Vijay Abraham I 2595e8cb403SKishon Vijay Abraham I return interrupt; 2605e8cb403SKishon Vijay Abraham I } 2615e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_get_msi); 2625e8cb403SKishon Vijay Abraham I 2635e8cb403SKishon Vijay Abraham I /** 2645e8cb403SKishon Vijay Abraham I * pci_epc_set_msi() - set the number of MSI interrupt numbers required 2655e8cb403SKishon Vijay Abraham I * @epc: the EPC device on which MSI has to be configured 2664494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 2675e8cb403SKishon Vijay Abraham I * @interrupts: number of MSI interrupts required by the EPF 2685e8cb403SKishon Vijay Abraham I * 2695e8cb403SKishon Vijay Abraham I * Invoke to set the required number of MSI interrupts. 2705e8cb403SKishon Vijay Abraham I */ 2714494738dSCyrille Pitchen int pci_epc_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts) 2725e8cb403SKishon Vijay Abraham I { 2735e8cb403SKishon Vijay Abraham I int ret; 2745e8cb403SKishon Vijay Abraham I u8 encode_int; 2755e8cb403SKishon Vijay Abraham I 27615c972dfSGustavo Pimentel if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions || 27715c972dfSGustavo Pimentel interrupts > 32) 2785e8cb403SKishon Vijay Abraham I return -EINVAL; 2795e8cb403SKishon Vijay Abraham I 2805e8cb403SKishon Vijay Abraham I if (!epc->ops->set_msi) 2815e8cb403SKishon Vijay Abraham I return 0; 2825e8cb403SKishon Vijay Abraham I 2835e8cb403SKishon Vijay Abraham I encode_int = order_base_2(interrupts); 2845e8cb403SKishon Vijay Abraham I 2853d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 2864494738dSCyrille Pitchen ret = epc->ops->set_msi(epc, func_no, encode_int); 2873d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 2885e8cb403SKishon Vijay Abraham I 2895e8cb403SKishon Vijay Abraham I return ret; 2905e8cb403SKishon Vijay Abraham I } 2915e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_set_msi); 2925e8cb403SKishon Vijay Abraham I 2935e8cb403SKishon Vijay Abraham I /** 2948963106eSGustavo Pimentel * pci_epc_get_msix() - get the number of MSI-X interrupt numbers allocated 2958963106eSGustavo Pimentel * @epc: the EPC device to which MSI-X interrupts was requested 2968963106eSGustavo Pimentel * @func_no: the endpoint function number in the EPC device 2978963106eSGustavo Pimentel * 2988963106eSGustavo Pimentel * Invoke to get the number of MSI-X interrupts allocated by the RC 2998963106eSGustavo Pimentel */ 3008963106eSGustavo Pimentel int pci_epc_get_msix(struct pci_epc *epc, u8 func_no) 3018963106eSGustavo Pimentel { 3028963106eSGustavo Pimentel int interrupt; 3038963106eSGustavo Pimentel 3048963106eSGustavo Pimentel if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) 3058963106eSGustavo Pimentel return 0; 3068963106eSGustavo Pimentel 3078963106eSGustavo Pimentel if (!epc->ops->get_msix) 3088963106eSGustavo Pimentel return 0; 3098963106eSGustavo Pimentel 3103d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 3118963106eSGustavo Pimentel interrupt = epc->ops->get_msix(epc, func_no); 3123d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 3138963106eSGustavo Pimentel 3148963106eSGustavo Pimentel if (interrupt < 0) 3158963106eSGustavo Pimentel return 0; 3168963106eSGustavo Pimentel 3178963106eSGustavo Pimentel return interrupt + 1; 3188963106eSGustavo Pimentel } 3198963106eSGustavo Pimentel EXPORT_SYMBOL_GPL(pci_epc_get_msix); 3208963106eSGustavo Pimentel 3218963106eSGustavo Pimentel /** 3228963106eSGustavo Pimentel * pci_epc_set_msix() - set the number of MSI-X interrupt numbers required 3238963106eSGustavo Pimentel * @epc: the EPC device on which MSI-X has to be configured 3248963106eSGustavo Pimentel * @func_no: the endpoint function number in the EPC device 3258963106eSGustavo Pimentel * @interrupts: number of MSI-X interrupts required by the EPF 32683153d9fSKishon Vijay Abraham I * @bir: BAR where the MSI-X table resides 32783153d9fSKishon Vijay Abraham I * @offset: Offset pointing to the start of MSI-X table 3288963106eSGustavo Pimentel * 3298963106eSGustavo Pimentel * Invoke to set the required number of MSI-X interrupts. 3308963106eSGustavo Pimentel */ 33183153d9fSKishon Vijay Abraham I int pci_epc_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts, 33283153d9fSKishon Vijay Abraham I enum pci_barno bir, u32 offset) 3338963106eSGustavo Pimentel { 3348963106eSGustavo Pimentel int ret; 3358963106eSGustavo Pimentel 3368963106eSGustavo Pimentel if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions || 3378963106eSGustavo Pimentel interrupts < 1 || interrupts > 2048) 3388963106eSGustavo Pimentel return -EINVAL; 3398963106eSGustavo Pimentel 3408963106eSGustavo Pimentel if (!epc->ops->set_msix) 3418963106eSGustavo Pimentel return 0; 3428963106eSGustavo Pimentel 3433d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 34483153d9fSKishon Vijay Abraham I ret = epc->ops->set_msix(epc, func_no, interrupts - 1, bir, offset); 3453d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 3468963106eSGustavo Pimentel 3478963106eSGustavo Pimentel return ret; 3488963106eSGustavo Pimentel } 3498963106eSGustavo Pimentel EXPORT_SYMBOL_GPL(pci_epc_set_msix); 3508963106eSGustavo Pimentel 3518963106eSGustavo Pimentel /** 3525e8cb403SKishon Vijay Abraham I * pci_epc_unmap_addr() - unmap CPU address from PCI address 3535e8cb403SKishon Vijay Abraham I * @epc: the EPC device on which address is allocated 3544494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 3555e8cb403SKishon Vijay Abraham I * @phys_addr: physical address of the local system 3565e8cb403SKishon Vijay Abraham I * 3575e8cb403SKishon Vijay Abraham I * Invoke to unmap the CPU address from PCI address. 3585e8cb403SKishon Vijay Abraham I */ 3594494738dSCyrille Pitchen void pci_epc_unmap_addr(struct pci_epc *epc, u8 func_no, 3604494738dSCyrille Pitchen phys_addr_t phys_addr) 3615e8cb403SKishon Vijay Abraham I { 3624494738dSCyrille Pitchen if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) 3635e8cb403SKishon Vijay Abraham I return; 3645e8cb403SKishon Vijay Abraham I 3655e8cb403SKishon Vijay Abraham I if (!epc->ops->unmap_addr) 3665e8cb403SKishon Vijay Abraham I return; 3675e8cb403SKishon Vijay Abraham I 3683d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 3694494738dSCyrille Pitchen epc->ops->unmap_addr(epc, func_no, phys_addr); 3703d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 3715e8cb403SKishon Vijay Abraham I } 3725e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_unmap_addr); 3735e8cb403SKishon Vijay Abraham I 3745e8cb403SKishon Vijay Abraham I /** 3755e8cb403SKishon Vijay Abraham I * pci_epc_map_addr() - map CPU address to PCI address 3765e8cb403SKishon Vijay Abraham I * @epc: the EPC device on which address is allocated 3774494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 3785e8cb403SKishon Vijay Abraham I * @phys_addr: physical address of the local system 3795e8cb403SKishon Vijay Abraham I * @pci_addr: PCI address to which the physical address should be mapped 3805e8cb403SKishon Vijay Abraham I * @size: the size of the allocation 3815e8cb403SKishon Vijay Abraham I * 3825e8cb403SKishon Vijay Abraham I * Invoke to map CPU address with PCI address. 3835e8cb403SKishon Vijay Abraham I */ 3844494738dSCyrille Pitchen int pci_epc_map_addr(struct pci_epc *epc, u8 func_no, 3854494738dSCyrille Pitchen phys_addr_t phys_addr, u64 pci_addr, size_t size) 3865e8cb403SKishon Vijay Abraham I { 3875e8cb403SKishon Vijay Abraham I int ret; 3885e8cb403SKishon Vijay Abraham I 3894494738dSCyrille Pitchen if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) 3905e8cb403SKishon Vijay Abraham I return -EINVAL; 3915e8cb403SKishon Vijay Abraham I 3925e8cb403SKishon Vijay Abraham I if (!epc->ops->map_addr) 3935e8cb403SKishon Vijay Abraham I return 0; 3945e8cb403SKishon Vijay Abraham I 3953d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 3964494738dSCyrille Pitchen ret = epc->ops->map_addr(epc, func_no, phys_addr, pci_addr, size); 3973d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 3985e8cb403SKishon Vijay Abraham I 3995e8cb403SKishon Vijay Abraham I return ret; 4005e8cb403SKishon Vijay Abraham I } 4015e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_map_addr); 4025e8cb403SKishon Vijay Abraham I 4035e8cb403SKishon Vijay Abraham I /** 4045e8cb403SKishon Vijay Abraham I * pci_epc_clear_bar() - reset the BAR 4055e8cb403SKishon Vijay Abraham I * @epc: the EPC device for which the BAR has to be cleared 4064494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 40777d08dbdSNiklas Cassel * @epf_bar: the struct epf_bar that contains the BAR information 4085e8cb403SKishon Vijay Abraham I * 4095e8cb403SKishon Vijay Abraham I * Invoke to reset the BAR of the endpoint device. 4105e8cb403SKishon Vijay Abraham I */ 41177d08dbdSNiklas Cassel void pci_epc_clear_bar(struct pci_epc *epc, u8 func_no, 41277d08dbdSNiklas Cassel struct pci_epf_bar *epf_bar) 4135e8cb403SKishon Vijay Abraham I { 4146474a4e5SNiklas Cassel if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions || 4156474a4e5SNiklas Cassel (epf_bar->barno == BAR_5 && 4166474a4e5SNiklas Cassel epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64)) 4175e8cb403SKishon Vijay Abraham I return; 4185e8cb403SKishon Vijay Abraham I 4195e8cb403SKishon Vijay Abraham I if (!epc->ops->clear_bar) 4205e8cb403SKishon Vijay Abraham I return; 4215e8cb403SKishon Vijay Abraham I 4223d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 42377d08dbdSNiklas Cassel epc->ops->clear_bar(epc, func_no, epf_bar); 4243d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 4255e8cb403SKishon Vijay Abraham I } 4265e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_clear_bar); 4275e8cb403SKishon Vijay Abraham I 4285e8cb403SKishon Vijay Abraham I /** 4295e8cb403SKishon Vijay Abraham I * pci_epc_set_bar() - configure BAR in order for host to assign PCI addr space 4305e8cb403SKishon Vijay Abraham I * @epc: the EPC device on which BAR has to be configured 4314494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 432bc4a4897SNiklas Cassel * @epf_bar: the struct epf_bar that contains the BAR information 4335e8cb403SKishon Vijay Abraham I * 4345e8cb403SKishon Vijay Abraham I * Invoke to configure the BAR of the endpoint device. 4355e8cb403SKishon Vijay Abraham I */ 436bc4a4897SNiklas Cassel int pci_epc_set_bar(struct pci_epc *epc, u8 func_no, 437bc4a4897SNiklas Cassel struct pci_epf_bar *epf_bar) 4385e8cb403SKishon Vijay Abraham I { 4395e8cb403SKishon Vijay Abraham I int ret; 4403567a4edSNiklas Cassel int flags = epf_bar->flags; 4415e8cb403SKishon Vijay Abraham I 442f16b1f6fSNiklas Cassel if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions || 443f16b1f6fSNiklas Cassel (epf_bar->barno == BAR_5 && 4443567a4edSNiklas Cassel flags & PCI_BASE_ADDRESS_MEM_TYPE_64) || 4453567a4edSNiklas Cassel (flags & PCI_BASE_ADDRESS_SPACE_IO && 446f25b5faeSNiklas Cassel flags & PCI_BASE_ADDRESS_IO_MASK) || 447f25b5faeSNiklas Cassel (upper_32_bits(epf_bar->size) && 448f25b5faeSNiklas Cassel !(flags & PCI_BASE_ADDRESS_MEM_TYPE_64))) 4495e8cb403SKishon Vijay Abraham I return -EINVAL; 4505e8cb403SKishon Vijay Abraham I 4515e8cb403SKishon Vijay Abraham I if (!epc->ops->set_bar) 4525e8cb403SKishon Vijay Abraham I return 0; 4535e8cb403SKishon Vijay Abraham I 4543d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 455bc4a4897SNiklas Cassel ret = epc->ops->set_bar(epc, func_no, epf_bar); 4563d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 4575e8cb403SKishon Vijay Abraham I 4585e8cb403SKishon Vijay Abraham I return ret; 4595e8cb403SKishon Vijay Abraham I } 4605e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_set_bar); 4615e8cb403SKishon Vijay Abraham I 4625e8cb403SKishon Vijay Abraham I /** 4635e8cb403SKishon Vijay Abraham I * pci_epc_write_header() - write standard configuration header 4645e8cb403SKishon Vijay Abraham I * @epc: the EPC device to which the configuration header should be written 4654494738dSCyrille Pitchen * @func_no: the endpoint function number in the EPC device 4665e8cb403SKishon Vijay Abraham I * @header: standard configuration header fields 4675e8cb403SKishon Vijay Abraham I * 4685e8cb403SKishon Vijay Abraham I * Invoke to write the configuration header to the endpoint controller. Every 4695e8cb403SKishon Vijay Abraham I * endpoint controller will have a dedicated location to which the standard 4705e8cb403SKishon Vijay Abraham I * configuration header would be written. The callback function should write 4715e8cb403SKishon Vijay Abraham I * the header fields to this dedicated location. 4725e8cb403SKishon Vijay Abraham I */ 4734494738dSCyrille Pitchen int pci_epc_write_header(struct pci_epc *epc, u8 func_no, 4744494738dSCyrille Pitchen struct pci_epf_header *header) 4755e8cb403SKishon Vijay Abraham I { 4765e8cb403SKishon Vijay Abraham I int ret; 4775e8cb403SKishon Vijay Abraham I 4784494738dSCyrille Pitchen if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions) 4795e8cb403SKishon Vijay Abraham I return -EINVAL; 4805e8cb403SKishon Vijay Abraham I 4815e8cb403SKishon Vijay Abraham I if (!epc->ops->write_header) 4825e8cb403SKishon Vijay Abraham I return 0; 4835e8cb403SKishon Vijay Abraham I 4843d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 4854494738dSCyrille Pitchen ret = epc->ops->write_header(epc, func_no, header); 4863d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 4875e8cb403SKishon Vijay Abraham I 4885e8cb403SKishon Vijay Abraham I return ret; 4895e8cb403SKishon Vijay Abraham I } 4905e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_write_header); 4915e8cb403SKishon Vijay Abraham I 4925e8cb403SKishon Vijay Abraham I /** 4935e8cb403SKishon Vijay Abraham I * pci_epc_add_epf() - bind PCI endpoint function to an endpoint controller 4945e8cb403SKishon Vijay Abraham I * @epc: the EPC device to which the endpoint function should be added 4955e8cb403SKishon Vijay Abraham I * @epf: the endpoint function to be added 4965e8cb403SKishon Vijay Abraham I * 4975e8cb403SKishon Vijay Abraham I * A PCI endpoint device can have one or more functions. In the case of PCIe, 4985e8cb403SKishon Vijay Abraham I * the specification allows up to 8 PCIe endpoint functions. Invoke 4995e8cb403SKishon Vijay Abraham I * pci_epc_add_epf() to add a PCI endpoint function to an endpoint controller. 5005e8cb403SKishon Vijay Abraham I */ 5015e8cb403SKishon Vijay Abraham I int pci_epc_add_epf(struct pci_epc *epc, struct pci_epf *epf) 5025e8cb403SKishon Vijay Abraham I { 5032499ee84SKishon Vijay Abraham I u32 func_no; 5042499ee84SKishon Vijay Abraham I int ret = 0; 5052499ee84SKishon Vijay Abraham I 5065e8cb403SKishon Vijay Abraham I if (epf->epc) 5075e8cb403SKishon Vijay Abraham I return -EBUSY; 5085e8cb403SKishon Vijay Abraham I 5095e8cb403SKishon Vijay Abraham I if (IS_ERR(epc)) 5105e8cb403SKishon Vijay Abraham I return -EINVAL; 5115e8cb403SKishon Vijay Abraham I 5122499ee84SKishon Vijay Abraham I mutex_lock(&epc->lock); 5132499ee84SKishon Vijay Abraham I func_no = find_first_zero_bit(&epc->function_num_map, 5142499ee84SKishon Vijay Abraham I BITS_PER_LONG); 5152499ee84SKishon Vijay Abraham I if (func_no >= BITS_PER_LONG) { 5162499ee84SKishon Vijay Abraham I ret = -EINVAL; 5172499ee84SKishon Vijay Abraham I goto ret; 5182499ee84SKishon Vijay Abraham I } 5195e8cb403SKishon Vijay Abraham I 5202499ee84SKishon Vijay Abraham I if (func_no > epc->max_functions - 1) { 5212499ee84SKishon Vijay Abraham I dev_err(&epc->dev, "Exceeding max supported Function Number\n"); 5222499ee84SKishon Vijay Abraham I ret = -EINVAL; 5232499ee84SKishon Vijay Abraham I goto ret; 5242499ee84SKishon Vijay Abraham I } 5252499ee84SKishon Vijay Abraham I 5262499ee84SKishon Vijay Abraham I set_bit(func_no, &epc->function_num_map); 5272499ee84SKishon Vijay Abraham I epf->func_no = func_no; 5285e8cb403SKishon Vijay Abraham I epf->epc = epc; 5295e8cb403SKishon Vijay Abraham I 5305e8cb403SKishon Vijay Abraham I list_add_tail(&epf->list, &epc->pci_epf); 5312499ee84SKishon Vijay Abraham I 5322499ee84SKishon Vijay Abraham I ret: 5333d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 5345e8cb403SKishon Vijay Abraham I 5352499ee84SKishon Vijay Abraham I return ret; 5365e8cb403SKishon Vijay Abraham I } 5375e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_add_epf); 5385e8cb403SKishon Vijay Abraham I 5395e8cb403SKishon Vijay Abraham I /** 5405e8cb403SKishon Vijay Abraham I * pci_epc_remove_epf() - remove PCI endpoint function from endpoint controller 5415e8cb403SKishon Vijay Abraham I * @epc: the EPC device from which the endpoint function should be removed 5425e8cb403SKishon Vijay Abraham I * @epf: the endpoint function to be removed 5435e8cb403SKishon Vijay Abraham I * 5445e8cb403SKishon Vijay Abraham I * Invoke to remove PCI endpoint function from the endpoint controller. 5455e8cb403SKishon Vijay Abraham I */ 5465e8cb403SKishon Vijay Abraham I void pci_epc_remove_epf(struct pci_epc *epc, struct pci_epf *epf) 5475e8cb403SKishon Vijay Abraham I { 548db7a6248SAlan Mikhak if (!epc || IS_ERR(epc) || !epf) 5495e8cb403SKishon Vijay Abraham I return; 5505e8cb403SKishon Vijay Abraham I 5513d3248dbSKishon Vijay Abraham I mutex_lock(&epc->lock); 5522499ee84SKishon Vijay Abraham I clear_bit(epf->func_no, &epc->function_num_map); 5535e8cb403SKishon Vijay Abraham I list_del(&epf->list); 554db7a6248SAlan Mikhak epf->epc = NULL; 5553d3248dbSKishon Vijay Abraham I mutex_unlock(&epc->lock); 5565e8cb403SKishon Vijay Abraham I } 5575e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_remove_epf); 5585e8cb403SKishon Vijay Abraham I 5595e8cb403SKishon Vijay Abraham I /** 5605e8cb403SKishon Vijay Abraham I * pci_epc_linkup() - Notify the EPF device that EPC device has established a 5615e8cb403SKishon Vijay Abraham I * connection with the Root Complex. 5625e8cb403SKishon Vijay Abraham I * @epc: the EPC device which has established link with the host 5635e8cb403SKishon Vijay Abraham I * 5645e8cb403SKishon Vijay Abraham I * Invoke to Notify the EPF device that the EPC device has established a 5655e8cb403SKishon Vijay Abraham I * connection with the Root Complex. 5665e8cb403SKishon Vijay Abraham I */ 5675e8cb403SKishon Vijay Abraham I void pci_epc_linkup(struct pci_epc *epc) 5685e8cb403SKishon Vijay Abraham I { 5695e8cb403SKishon Vijay Abraham I if (!epc || IS_ERR(epc)) 5705e8cb403SKishon Vijay Abraham I return; 5715e8cb403SKishon Vijay Abraham I 5720ef22dcfSVidya Sagar atomic_notifier_call_chain(&epc->notifier, LINK_UP, NULL); 5735e8cb403SKishon Vijay Abraham I } 5745e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_linkup); 5755e8cb403SKishon Vijay Abraham I 5765e8cb403SKishon Vijay Abraham I /** 5770ef22dcfSVidya Sagar * pci_epc_init_notify() - Notify the EPF device that EPC device's core 5780ef22dcfSVidya Sagar * initialization is completed. 5790ef22dcfSVidya Sagar * @epc: the EPC device whose core initialization is completeds 5800ef22dcfSVidya Sagar * 5810ef22dcfSVidya Sagar * Invoke to Notify the EPF device that the EPC device's initialization 5820ef22dcfSVidya Sagar * is completed. 5830ef22dcfSVidya Sagar */ 5840ef22dcfSVidya Sagar void pci_epc_init_notify(struct pci_epc *epc) 5850ef22dcfSVidya Sagar { 5860ef22dcfSVidya Sagar if (!epc || IS_ERR(epc)) 5870ef22dcfSVidya Sagar return; 5880ef22dcfSVidya Sagar 5890ef22dcfSVidya Sagar atomic_notifier_call_chain(&epc->notifier, CORE_INIT, NULL); 5900ef22dcfSVidya Sagar } 5910ef22dcfSVidya Sagar EXPORT_SYMBOL_GPL(pci_epc_init_notify); 5920ef22dcfSVidya Sagar 5930ef22dcfSVidya Sagar /** 5945e8cb403SKishon Vijay Abraham I * pci_epc_destroy() - destroy the EPC device 5955e8cb403SKishon Vijay Abraham I * @epc: the EPC device that has to be destroyed 5965e8cb403SKishon Vijay Abraham I * 5975e8cb403SKishon Vijay Abraham I * Invoke to destroy the PCI EPC device 5985e8cb403SKishon Vijay Abraham I */ 5995e8cb403SKishon Vijay Abraham I void pci_epc_destroy(struct pci_epc *epc) 6005e8cb403SKishon Vijay Abraham I { 6013a401a2cSKishon Vijay Abraham I pci_ep_cfs_remove_epc_group(epc->group); 6025e8cb403SKishon Vijay Abraham I device_unregister(&epc->dev); 6035e8cb403SKishon Vijay Abraham I kfree(epc); 6045e8cb403SKishon Vijay Abraham I } 6055e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(pci_epc_destroy); 6065e8cb403SKishon Vijay Abraham I 6075e8cb403SKishon Vijay Abraham I /** 6085e8cb403SKishon Vijay Abraham I * devm_pci_epc_destroy() - destroy the EPC device 6095e8cb403SKishon Vijay Abraham I * @dev: device that wants to destroy the EPC 6105e8cb403SKishon Vijay Abraham I * @epc: the EPC device that has to be destroyed 6115e8cb403SKishon Vijay Abraham I * 6125e8cb403SKishon Vijay Abraham I * Invoke to destroy the devres associated with this 6135e8cb403SKishon Vijay Abraham I * pci_epc and destroy the EPC device. 6145e8cb403SKishon Vijay Abraham I */ 6155e8cb403SKishon Vijay Abraham I void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc) 6165e8cb403SKishon Vijay Abraham I { 6175e8cb403SKishon Vijay Abraham I int r; 6185e8cb403SKishon Vijay Abraham I 6195e8cb403SKishon Vijay Abraham I r = devres_destroy(dev, devm_pci_epc_release, devm_pci_epc_match, 6205e8cb403SKishon Vijay Abraham I epc); 6215e8cb403SKishon Vijay Abraham I dev_WARN_ONCE(dev, r, "couldn't find PCI EPC resource\n"); 6225e8cb403SKishon Vijay Abraham I } 6235e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(devm_pci_epc_destroy); 6245e8cb403SKishon Vijay Abraham I 6255e8cb403SKishon Vijay Abraham I /** 6265e8cb403SKishon Vijay Abraham I * __pci_epc_create() - create a new endpoint controller (EPC) device 6275e8cb403SKishon Vijay Abraham I * @dev: device that is creating the new EPC 6285e8cb403SKishon Vijay Abraham I * @ops: function pointers for performing EPC operations 6295e8cb403SKishon Vijay Abraham I * @owner: the owner of the module that creates the EPC device 6305e8cb403SKishon Vijay Abraham I * 6315e8cb403SKishon Vijay Abraham I * Invoke to create a new EPC device and add it to pci_epc class. 6325e8cb403SKishon Vijay Abraham I */ 6335e8cb403SKishon Vijay Abraham I struct pci_epc * 6345e8cb403SKishon Vijay Abraham I __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, 6355e8cb403SKishon Vijay Abraham I struct module *owner) 6365e8cb403SKishon Vijay Abraham I { 6375e8cb403SKishon Vijay Abraham I int ret; 6385e8cb403SKishon Vijay Abraham I struct pci_epc *epc; 6395e8cb403SKishon Vijay Abraham I 6405e8cb403SKishon Vijay Abraham I if (WARN_ON(!dev)) { 6415e8cb403SKishon Vijay Abraham I ret = -EINVAL; 6425e8cb403SKishon Vijay Abraham I goto err_ret; 6435e8cb403SKishon Vijay Abraham I } 6445e8cb403SKishon Vijay Abraham I 6455e8cb403SKishon Vijay Abraham I epc = kzalloc(sizeof(*epc), GFP_KERNEL); 6465e8cb403SKishon Vijay Abraham I if (!epc) { 6475e8cb403SKishon Vijay Abraham I ret = -ENOMEM; 6485e8cb403SKishon Vijay Abraham I goto err_ret; 6495e8cb403SKishon Vijay Abraham I } 6505e8cb403SKishon Vijay Abraham I 6513d3248dbSKishon Vijay Abraham I mutex_init(&epc->lock); 6525e8cb403SKishon Vijay Abraham I INIT_LIST_HEAD(&epc->pci_epf); 6535779dd0aSKishon Vijay Abraham I ATOMIC_INIT_NOTIFIER_HEAD(&epc->notifier); 6545e8cb403SKishon Vijay Abraham I 6555e8cb403SKishon Vijay Abraham I device_initialize(&epc->dev); 6565e8cb403SKishon Vijay Abraham I epc->dev.class = pci_epc_class; 65764c1a02aSKishon Vijay Abraham I epc->dev.parent = dev; 6585e8cb403SKishon Vijay Abraham I epc->ops = ops; 6595e8cb403SKishon Vijay Abraham I 6605e8cb403SKishon Vijay Abraham I ret = dev_set_name(&epc->dev, "%s", dev_name(dev)); 6615e8cb403SKishon Vijay Abraham I if (ret) 6625e8cb403SKishon Vijay Abraham I goto put_dev; 6635e8cb403SKishon Vijay Abraham I 6645e8cb403SKishon Vijay Abraham I ret = device_add(&epc->dev); 6655e8cb403SKishon Vijay Abraham I if (ret) 6665e8cb403SKishon Vijay Abraham I goto put_dev; 6675e8cb403SKishon Vijay Abraham I 6683a401a2cSKishon Vijay Abraham I epc->group = pci_ep_cfs_add_epc_group(dev_name(dev)); 6693a401a2cSKishon Vijay Abraham I 6705e8cb403SKishon Vijay Abraham I return epc; 6715e8cb403SKishon Vijay Abraham I 6725e8cb403SKishon Vijay Abraham I put_dev: 6735e8cb403SKishon Vijay Abraham I put_device(&epc->dev); 6745e8cb403SKishon Vijay Abraham I kfree(epc); 6755e8cb403SKishon Vijay Abraham I 6765e8cb403SKishon Vijay Abraham I err_ret: 6775e8cb403SKishon Vijay Abraham I return ERR_PTR(ret); 6785e8cb403SKishon Vijay Abraham I } 6795e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(__pci_epc_create); 6805e8cb403SKishon Vijay Abraham I 6815e8cb403SKishon Vijay Abraham I /** 6825e8cb403SKishon Vijay Abraham I * __devm_pci_epc_create() - create a new endpoint controller (EPC) device 6835e8cb403SKishon Vijay Abraham I * @dev: device that is creating the new EPC 6845e8cb403SKishon Vijay Abraham I * @ops: function pointers for performing EPC operations 6855e8cb403SKishon Vijay Abraham I * @owner: the owner of the module that creates the EPC device 6865e8cb403SKishon Vijay Abraham I * 6875e8cb403SKishon Vijay Abraham I * Invoke to create a new EPC device and add it to pci_epc class. 6885e8cb403SKishon Vijay Abraham I * While at that, it also associates the device with the pci_epc using devres. 6895e8cb403SKishon Vijay Abraham I * On driver detach, release function is invoked on the devres data, 6905e8cb403SKishon Vijay Abraham I * then, devres data is freed. 6915e8cb403SKishon Vijay Abraham I */ 6925e8cb403SKishon Vijay Abraham I struct pci_epc * 6935e8cb403SKishon Vijay Abraham I __devm_pci_epc_create(struct device *dev, const struct pci_epc_ops *ops, 6945e8cb403SKishon Vijay Abraham I struct module *owner) 6955e8cb403SKishon Vijay Abraham I { 6965e8cb403SKishon Vijay Abraham I struct pci_epc **ptr, *epc; 6975e8cb403SKishon Vijay Abraham I 6985e8cb403SKishon Vijay Abraham I ptr = devres_alloc(devm_pci_epc_release, sizeof(*ptr), GFP_KERNEL); 6995e8cb403SKishon Vijay Abraham I if (!ptr) 7005e8cb403SKishon Vijay Abraham I return ERR_PTR(-ENOMEM); 7015e8cb403SKishon Vijay Abraham I 7025e8cb403SKishon Vijay Abraham I epc = __pci_epc_create(dev, ops, owner); 7035e8cb403SKishon Vijay Abraham I if (!IS_ERR(epc)) { 7045e8cb403SKishon Vijay Abraham I *ptr = epc; 7055e8cb403SKishon Vijay Abraham I devres_add(dev, ptr); 7065e8cb403SKishon Vijay Abraham I } else { 7075e8cb403SKishon Vijay Abraham I devres_free(ptr); 7085e8cb403SKishon Vijay Abraham I } 7095e8cb403SKishon Vijay Abraham I 7105e8cb403SKishon Vijay Abraham I return epc; 7115e8cb403SKishon Vijay Abraham I } 7125e8cb403SKishon Vijay Abraham I EXPORT_SYMBOL_GPL(__devm_pci_epc_create); 7135e8cb403SKishon Vijay Abraham I 7145e8cb403SKishon Vijay Abraham I static int __init pci_epc_init(void) 7155e8cb403SKishon Vijay Abraham I { 7165e8cb403SKishon Vijay Abraham I pci_epc_class = class_create(THIS_MODULE, "pci_epc"); 7175e8cb403SKishon Vijay Abraham I if (IS_ERR(pci_epc_class)) { 7185e8cb403SKishon Vijay Abraham I pr_err("failed to create pci epc class --> %ld\n", 7195e8cb403SKishon Vijay Abraham I PTR_ERR(pci_epc_class)); 7205e8cb403SKishon Vijay Abraham I return PTR_ERR(pci_epc_class); 7215e8cb403SKishon Vijay Abraham I } 7225e8cb403SKishon Vijay Abraham I 7235e8cb403SKishon Vijay Abraham I return 0; 7245e8cb403SKishon Vijay Abraham I } 7255e8cb403SKishon Vijay Abraham I module_init(pci_epc_init); 7265e8cb403SKishon Vijay Abraham I 7275e8cb403SKishon Vijay Abraham I static void __exit pci_epc_exit(void) 7285e8cb403SKishon Vijay Abraham I { 7295e8cb403SKishon Vijay Abraham I class_destroy(pci_epc_class); 7305e8cb403SKishon Vijay Abraham I } 7315e8cb403SKishon Vijay Abraham I module_exit(pci_epc_exit); 7325e8cb403SKishon Vijay Abraham I 7335e8cb403SKishon Vijay Abraham I MODULE_DESCRIPTION("PCI EPC Library"); 7345e8cb403SKishon Vijay Abraham I MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>"); 7355e8cb403SKishon Vijay Abraham I MODULE_LICENSE("GPL v2"); 736