// SPDX-License-Identifier: GPL-2.0 /* * Test driver to test endpoint functionality * * Copyright (C) 2017 Texas Instruments * Author: Kishon Vijay Abraham I <[email protected]> */ #include <linux/crc32.h> #include <linux/delay.h> #include <linux/dmaengine.h> #include <linux/io.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/pci_ids.h> #include <linux/random.h> #include <linux/pci-epc.h> #include <linux/pci-epf.h> #include <linux/pci_regs.h> #define IRQ_TYPE_INTX … #define IRQ_TYPE_MSI … #define IRQ_TYPE_MSIX … #define COMMAND_RAISE_INTX_IRQ … #define COMMAND_RAISE_MSI_IRQ … #define COMMAND_RAISE_MSIX_IRQ … #define COMMAND_READ … #define COMMAND_WRITE … #define COMMAND_COPY … #define STATUS_READ_SUCCESS … #define STATUS_READ_FAIL … #define STATUS_WRITE_SUCCESS … #define STATUS_WRITE_FAIL … #define STATUS_COPY_SUCCESS … #define STATUS_COPY_FAIL … #define STATUS_IRQ_RAISED … #define STATUS_SRC_ADDR_INVALID … #define STATUS_DST_ADDR_INVALID … #define FLAG_USE_DMA … #define TIMER_RESOLUTION … static struct workqueue_struct *kpcitest_workqueue; struct pci_epf_test { … }; struct pci_epf_test_reg { … } __packed; static struct pci_epf_header test_header = …; static size_t bar_size[] = …; static void pci_epf_test_dma_callback(void *param) { … } /** * pci_epf_test_data_transfer() - Function that uses dmaengine API to transfer * data between PCIe EP and remote PCIe RC * @epf_test: the EPF test device that performs the data transfer operation * @dma_dst: The destination address of the data transfer. It can be a physical * address given by pci_epc_mem_alloc_addr or DMA mapping APIs. * @dma_src: The source address of the data transfer. It can be a physical * address given by pci_epc_mem_alloc_addr or DMA mapping APIs. * @len: The size of the data transfer * @dma_remote: remote RC physical address * @dir: DMA transfer direction * * Function that uses dmaengine API to transfer data between PCIe EP and remote * PCIe RC. The source and destination address can be a physical address given * by pci_epc_mem_alloc_addr or the one obtained using DMA mapping APIs. * * The function returns '0' on success and negative value on failure. */ static int pci_epf_test_data_transfer(struct pci_epf_test *epf_test, dma_addr_t dma_dst, dma_addr_t dma_src, size_t len, dma_addr_t dma_remote, enum dma_transfer_direction dir) { … } struct epf_dma_filter { … }; static bool epf_dma_filter_fn(struct dma_chan *chan, void *node) { … } /** * pci_epf_test_init_dma_chan() - Function to initialize EPF test DMA channel * @epf_test: the EPF test device that performs data transfer operation * * Function to initialize EPF test DMA channel. */ static int pci_epf_test_init_dma_chan(struct pci_epf_test *epf_test) { … } /** * pci_epf_test_clean_dma_chan() - Function to cleanup EPF test DMA channel * @epf_test: the EPF test device that performs data transfer operation * * Helper to cleanup EPF test DMA channel. */ static void pci_epf_test_clean_dma_chan(struct pci_epf_test *epf_test) { … } static void pci_epf_test_print_rate(struct pci_epf_test *epf_test, const char *op, u64 size, struct timespec64 *start, struct timespec64 *end, bool dma) { … } static void pci_epf_test_copy(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { … } static void pci_epf_test_read(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { … } static void pci_epf_test_write(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { … } static void pci_epf_test_raise_irq(struct pci_epf_test *epf_test, struct pci_epf_test_reg *reg) { … } static void pci_epf_test_cmd_handler(struct work_struct *work) { … } static int pci_epf_test_set_bar(struct pci_epf *epf) { … } static void pci_epf_test_clear_bar(struct pci_epf *epf) { … } static int pci_epf_test_epc_init(struct pci_epf *epf) { … } static void pci_epf_test_epc_deinit(struct pci_epf *epf) { … } static int pci_epf_test_link_up(struct pci_epf *epf) { … } static int pci_epf_test_link_down(struct pci_epf *epf) { … } static const struct pci_epc_event_ops pci_epf_test_event_ops = …; static int pci_epf_test_alloc_space(struct pci_epf *epf) { … } static void pci_epf_test_free_space(struct pci_epf *epf) { … } static int pci_epf_test_bind(struct pci_epf *epf) { … } static void pci_epf_test_unbind(struct pci_epf *epf) { … } static const struct pci_epf_device_id pci_epf_test_ids[] = …; static int pci_epf_test_probe(struct pci_epf *epf, const struct pci_epf_device_id *id) { … } static const struct pci_epf_ops ops = …; static struct pci_epf_driver test_driver = …; static int __init pci_epf_test_init(void) { … } module_init(…) …; static void __exit pci_epf_test_exit(void) { … } module_exit(pci_epf_test_exit); MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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