2 * CXL Flash Device Driver
4 * Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
5 * Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation
7 * Copyright (C) 2018 IBM Corporation
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
20 * The following routines map the cxlflash backend operations to existing CXL
21 * kernel API function and are largely simple shims that provide an abstraction
22 * for converting generic context and AFU cookies into cxl_context or cxl_afu
26 static void __iomem
*cxlflash_psa_map(void *ctx_cookie
)
28 return cxl_psa_map(ctx_cookie
);
31 static void cxlflash_psa_unmap(void __iomem
*addr
)
36 static int cxlflash_process_element(void *ctx_cookie
)
38 return cxl_process_element(ctx_cookie
);
41 static int cxlflash_map_afu_irq(void *ctx_cookie
, int num
,
42 irq_handler_t handler
, void *cookie
, char *name
)
44 return cxl_map_afu_irq(ctx_cookie
, num
, handler
, cookie
, name
);
47 static void cxlflash_unmap_afu_irq(void *ctx_cookie
, int num
, void *cookie
)
49 cxl_unmap_afu_irq(ctx_cookie
, num
, cookie
);
52 static int cxlflash_start_context(void *ctx_cookie
)
54 return cxl_start_context(ctx_cookie
, 0, NULL
);
57 static int cxlflash_stop_context(void *ctx_cookie
)
59 return cxl_stop_context(ctx_cookie
);
62 static int cxlflash_afu_reset(void *ctx_cookie
)
64 return cxl_afu_reset(ctx_cookie
);
67 static void cxlflash_set_master(void *ctx_cookie
)
69 cxl_set_master(ctx_cookie
);
72 static void *cxlflash_get_context(struct pci_dev
*dev
, void *afu_cookie
)
74 return cxl_get_context(dev
);
77 static void *cxlflash_dev_context_init(struct pci_dev
*dev
, void *afu_cookie
)
79 return cxl_dev_context_init(dev
);
82 static int cxlflash_release_context(void *ctx_cookie
)
84 return cxl_release_context(ctx_cookie
);
87 static void cxlflash_perst_reloads_same_image(void *afu_cookie
, bool image
)
89 cxl_perst_reloads_same_image(afu_cookie
, image
);
92 static ssize_t
cxlflash_read_adapter_vpd(struct pci_dev
*dev
,
93 void *buf
, size_t count
)
95 return cxl_read_adapter_vpd(dev
, buf
, count
);
98 static int cxlflash_allocate_afu_irqs(void *ctx_cookie
, int num
)
100 return cxl_allocate_afu_irqs(ctx_cookie
, num
);
103 static void cxlflash_free_afu_irqs(void *ctx_cookie
)
105 cxl_free_afu_irqs(ctx_cookie
);
108 static void *cxlflash_create_afu(struct pci_dev
*dev
)
110 return cxl_pci_to_afu(dev
);
113 static struct file
*cxlflash_get_fd(void *ctx_cookie
,
114 struct file_operations
*fops
, int *fd
)
116 return cxl_get_fd(ctx_cookie
, fops
, fd
);
119 static void *cxlflash_fops_get_context(struct file
*file
)
121 return cxl_fops_get_context(file
);
124 static int cxlflash_start_work(void *ctx_cookie
, u64 irqs
)
126 struct cxl_ioctl_start_work work
= { 0 };
128 work
.num_interrupts
= irqs
;
129 work
.flags
= CXL_START_WORK_NUM_IRQS
;
131 return cxl_start_work(ctx_cookie
, &work
);
134 static int cxlflash_fd_mmap(struct file
*file
, struct vm_area_struct
*vm
)
136 return cxl_fd_mmap(file
, vm
);
139 static int cxlflash_fd_release(struct inode
*inode
, struct file
*file
)
141 return cxl_fd_release(inode
, file
);
144 const struct cxlflash_backend_ops cxlflash_cxl_ops
= {
145 .module
= THIS_MODULE
,
146 .psa_map
= cxlflash_psa_map
,
147 .psa_unmap
= cxlflash_psa_unmap
,
148 .process_element
= cxlflash_process_element
,
149 .map_afu_irq
= cxlflash_map_afu_irq
,
150 .unmap_afu_irq
= cxlflash_unmap_afu_irq
,
151 .start_context
= cxlflash_start_context
,
152 .stop_context
= cxlflash_stop_context
,
153 .afu_reset
= cxlflash_afu_reset
,
154 .set_master
= cxlflash_set_master
,
155 .get_context
= cxlflash_get_context
,
156 .dev_context_init
= cxlflash_dev_context_init
,
157 .release_context
= cxlflash_release_context
,
158 .perst_reloads_same_image
= cxlflash_perst_reloads_same_image
,
159 .read_adapter_vpd
= cxlflash_read_adapter_vpd
,
160 .allocate_afu_irqs
= cxlflash_allocate_afu_irqs
,
161 .free_afu_irqs
= cxlflash_free_afu_irqs
,
162 .create_afu
= cxlflash_create_afu
,
163 .get_fd
= cxlflash_get_fd
,
164 .fops_get_context
= cxlflash_fops_get_context
,
165 .start_work
= cxlflash_start_work
,
166 .fd_mmap
= cxlflash_fd_mmap
,
167 .fd_release
= cxlflash_fd_release
,