Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Matthew R. Ochs | 25b8e08 | 2018-01-03 16:55:26 -0600 | [diff] [blame] | 2 | /* |
| 3 | * CXL Flash Device Driver |
| 4 | * |
| 5 | * Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation |
| 6 | * Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation |
| 7 | * |
| 8 | * Copyright (C) 2018 IBM Corporation |
Matthew R. Ochs | 25b8e08 | 2018-01-03 16:55:26 -0600 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <misc/cxl.h> |
| 12 | |
| 13 | #include "backend.h" |
| 14 | |
| 15 | /* |
| 16 | * The following routines map the cxlflash backend operations to existing CXL |
| 17 | * kernel API function and are largely simple shims that provide an abstraction |
| 18 | * for converting generic context and AFU cookies into cxl_context or cxl_afu |
| 19 | * pointers. |
| 20 | */ |
| 21 | |
| 22 | static void __iomem *cxlflash_psa_map(void *ctx_cookie) |
| 23 | { |
| 24 | return cxl_psa_map(ctx_cookie); |
| 25 | } |
| 26 | |
| 27 | static void cxlflash_psa_unmap(void __iomem *addr) |
| 28 | { |
| 29 | cxl_psa_unmap(addr); |
| 30 | } |
| 31 | |
| 32 | static int cxlflash_process_element(void *ctx_cookie) |
| 33 | { |
| 34 | return cxl_process_element(ctx_cookie); |
| 35 | } |
| 36 | |
| 37 | static int cxlflash_map_afu_irq(void *ctx_cookie, int num, |
| 38 | irq_handler_t handler, void *cookie, char *name) |
| 39 | { |
| 40 | return cxl_map_afu_irq(ctx_cookie, num, handler, cookie, name); |
| 41 | } |
| 42 | |
| 43 | static void cxlflash_unmap_afu_irq(void *ctx_cookie, int num, void *cookie) |
| 44 | { |
| 45 | cxl_unmap_afu_irq(ctx_cookie, num, cookie); |
| 46 | } |
| 47 | |
Uma Krishnan | 402a55e | 2018-03-26 11:34:35 -0500 | [diff] [blame] | 48 | static u64 cxlflash_get_irq_objhndl(void *ctx_cookie, int irq) |
| 49 | { |
| 50 | /* Dummy fop for cxl */ |
| 51 | return 0; |
| 52 | } |
| 53 | |
Matthew R. Ochs | 25b8e08 | 2018-01-03 16:55:26 -0600 | [diff] [blame] | 54 | static int cxlflash_start_context(void *ctx_cookie) |
| 55 | { |
| 56 | return cxl_start_context(ctx_cookie, 0, NULL); |
| 57 | } |
| 58 | |
| 59 | static int cxlflash_stop_context(void *ctx_cookie) |
| 60 | { |
| 61 | return cxl_stop_context(ctx_cookie); |
| 62 | } |
| 63 | |
| 64 | static int cxlflash_afu_reset(void *ctx_cookie) |
| 65 | { |
| 66 | return cxl_afu_reset(ctx_cookie); |
| 67 | } |
| 68 | |
| 69 | static void cxlflash_set_master(void *ctx_cookie) |
| 70 | { |
| 71 | cxl_set_master(ctx_cookie); |
| 72 | } |
| 73 | |
| 74 | static void *cxlflash_get_context(struct pci_dev *dev, void *afu_cookie) |
| 75 | { |
| 76 | return cxl_get_context(dev); |
| 77 | } |
| 78 | |
| 79 | static void *cxlflash_dev_context_init(struct pci_dev *dev, void *afu_cookie) |
| 80 | { |
| 81 | return cxl_dev_context_init(dev); |
| 82 | } |
| 83 | |
| 84 | static int cxlflash_release_context(void *ctx_cookie) |
| 85 | { |
| 86 | return cxl_release_context(ctx_cookie); |
| 87 | } |
| 88 | |
| 89 | static void cxlflash_perst_reloads_same_image(void *afu_cookie, bool image) |
| 90 | { |
| 91 | cxl_perst_reloads_same_image(afu_cookie, image); |
| 92 | } |
| 93 | |
| 94 | static ssize_t cxlflash_read_adapter_vpd(struct pci_dev *dev, |
| 95 | void *buf, size_t count) |
| 96 | { |
| 97 | return cxl_read_adapter_vpd(dev, buf, count); |
| 98 | } |
| 99 | |
| 100 | static int cxlflash_allocate_afu_irqs(void *ctx_cookie, int num) |
| 101 | { |
| 102 | return cxl_allocate_afu_irqs(ctx_cookie, num); |
| 103 | } |
| 104 | |
| 105 | static void cxlflash_free_afu_irqs(void *ctx_cookie) |
| 106 | { |
| 107 | cxl_free_afu_irqs(ctx_cookie); |
| 108 | } |
| 109 | |
| 110 | static void *cxlflash_create_afu(struct pci_dev *dev) |
| 111 | { |
| 112 | return cxl_pci_to_afu(dev); |
| 113 | } |
| 114 | |
Uma Krishnan | 48e077d | 2018-03-26 11:31:01 -0500 | [diff] [blame] | 115 | static void cxlflash_destroy_afu(void *afu) |
| 116 | { |
| 117 | /* Dummy fop for cxl */ |
| 118 | } |
| 119 | |
Matthew R. Ochs | 25b8e08 | 2018-01-03 16:55:26 -0600 | [diff] [blame] | 120 | static struct file *cxlflash_get_fd(void *ctx_cookie, |
| 121 | struct file_operations *fops, int *fd) |
| 122 | { |
| 123 | return cxl_get_fd(ctx_cookie, fops, fd); |
| 124 | } |
| 125 | |
| 126 | static void *cxlflash_fops_get_context(struct file *file) |
| 127 | { |
| 128 | return cxl_fops_get_context(file); |
| 129 | } |
| 130 | |
| 131 | static int cxlflash_start_work(void *ctx_cookie, u64 irqs) |
| 132 | { |
| 133 | struct cxl_ioctl_start_work work = { 0 }; |
| 134 | |
| 135 | work.num_interrupts = irqs; |
| 136 | work.flags = CXL_START_WORK_NUM_IRQS; |
| 137 | |
| 138 | return cxl_start_work(ctx_cookie, &work); |
| 139 | } |
| 140 | |
| 141 | static int cxlflash_fd_mmap(struct file *file, struct vm_area_struct *vm) |
| 142 | { |
| 143 | return cxl_fd_mmap(file, vm); |
| 144 | } |
| 145 | |
| 146 | static int cxlflash_fd_release(struct inode *inode, struct file *file) |
| 147 | { |
| 148 | return cxl_fd_release(inode, file); |
| 149 | } |
| 150 | |
| 151 | const struct cxlflash_backend_ops cxlflash_cxl_ops = { |
| 152 | .module = THIS_MODULE, |
| 153 | .psa_map = cxlflash_psa_map, |
| 154 | .psa_unmap = cxlflash_psa_unmap, |
| 155 | .process_element = cxlflash_process_element, |
| 156 | .map_afu_irq = cxlflash_map_afu_irq, |
| 157 | .unmap_afu_irq = cxlflash_unmap_afu_irq, |
Uma Krishnan | 402a55e | 2018-03-26 11:34:35 -0500 | [diff] [blame] | 158 | .get_irq_objhndl = cxlflash_get_irq_objhndl, |
Matthew R. Ochs | 25b8e08 | 2018-01-03 16:55:26 -0600 | [diff] [blame] | 159 | .start_context = cxlflash_start_context, |
| 160 | .stop_context = cxlflash_stop_context, |
| 161 | .afu_reset = cxlflash_afu_reset, |
| 162 | .set_master = cxlflash_set_master, |
| 163 | .get_context = cxlflash_get_context, |
| 164 | .dev_context_init = cxlflash_dev_context_init, |
| 165 | .release_context = cxlflash_release_context, |
| 166 | .perst_reloads_same_image = cxlflash_perst_reloads_same_image, |
| 167 | .read_adapter_vpd = cxlflash_read_adapter_vpd, |
| 168 | .allocate_afu_irqs = cxlflash_allocate_afu_irqs, |
| 169 | .free_afu_irqs = cxlflash_free_afu_irqs, |
| 170 | .create_afu = cxlflash_create_afu, |
Uma Krishnan | 48e077d | 2018-03-26 11:31:01 -0500 | [diff] [blame] | 171 | .destroy_afu = cxlflash_destroy_afu, |
Matthew R. Ochs | 25b8e08 | 2018-01-03 16:55:26 -0600 | [diff] [blame] | 172 | .get_fd = cxlflash_get_fd, |
| 173 | .fops_get_context = cxlflash_fops_get_context, |
| 174 | .start_work = cxlflash_start_work, |
| 175 | .fd_mmap = cxlflash_fd_mmap, |
| 176 | .fd_release = cxlflash_fd_release, |
| 177 | }; |