drivers/thunderbolt/nvm.c

1 // SPDX-License-Identifier: GPL-2.0
18  * tb_nvm_alloc() - Allocate new NVM structure
31 		return ERR_PTR(-ENOMEM);  in tb_nvm_alloc()
39 	nvm->id = ret;  in tb_nvm_alloc()
40 	nvm->dev = dev;  in tb_nvm_alloc()
46  * tb_nvm_add_active() - Adds active NVMem device to NVM
55  * Returns %0 in success and negative errno otherwise.
67 	config.id = nvm->id;  in tb_nvm_add_active()
71 	config.dev = nvm->dev;  in tb_nvm_add_active()
79 	nvm->active = nvmem;  in tb_nvm_add_active()
84  * tb_nvm_write_buf() - Write data to @nvm buffer
91  * written to the flash. Copies @bytes from @val to @nvm->buf starting
97 	if (!nvm->buf) {  in tb_nvm_write_buf()
98 		nvm->buf = vmalloc(NVM_MAX_SIZE);  in tb_nvm_write_buf()
99 		if (!nvm->buf)  in tb_nvm_write_buf()
100 			return -ENOMEM;  in tb_nvm_write_buf()
103 	nvm->flushed = false;  in tb_nvm_write_buf()
104 	nvm->buf_data_size = offset + bytes;  in tb_nvm_write_buf()
105 	memcpy(nvm->buf + offset, val, bytes);  in tb_nvm_write_buf()
110  * tb_nvm_add_non_active() - Adds non-active NVMem device to NVM
112  * @size: Size of the non-active NVM in bytes
116  * Registers new non-active NVmem device for @nvm. The @reg_write is called
119  * Returns %0 in success and negative errno otherwise.
132 	config.id = nvm->id;  in tb_nvm_add_non_active()
136 	config.dev = nvm->dev;  in tb_nvm_add_non_active()
144 	nvm->non_active = nvmem;  in tb_nvm_add_non_active()
149  * tb_nvm_free() - Release NVM and its resources
157 		if (nvm->non_active)  in tb_nvm_free()
158 			nvmem_unregister(nvm->non_active);  in tb_nvm_free()
159 		if (nvm->active)  in tb_nvm_free()
160 			nvmem_unregister(nvm->active);  in tb_nvm_free()
161 		vfree(nvm->buf);  in tb_nvm_free()
162 		ida_simple_remove(&nvm_ida, nvm->id);  in tb_nvm_free()