1 // SPDX-License-Identifier: GPL-2.0
28  * struct tb_nvm_vendor_ops - Vendor specific NVM operations
40  * struct tb_nvm_vendor - Vendor to &struct tb_nvm_vendor_ops mapping
54 	struct tb_switch *sw = tb_to_switch(nvm->dev);  in intel_switch_nvm_version()
59 	 * If the switch is in safe-mode the only accessible portion of  in intel_switch_nvm_version()
60 	 * the NVM is the non-active one where userspace is expected to  in intel_switch_nvm_version()
63 	if (sw->safe_mode)  in intel_switch_nvm_version()
70 	hdr_size = sw->generation < 3 ? SZ_8K : SZ_16K;  in intel_switch_nvm_version()
72 	nvm_size = (nvm_size - hdr_size) / 2;  in intel_switch_nvm_version()
78 	nvm->major = (val >> 16) & 0xff;  in intel_switch_nvm_version()
79 	nvm->minor = (val >> 8) & 0xff;  in intel_switch_nvm_version()
80 	nvm->active_size = nvm_size;  in intel_switch_nvm_version()
87 	struct tb_switch *sw = tb_to_switch(nvm->dev);  in intel_switch_nvm_validate()
90 	u8 *buf = nvm->buf;  in intel_switch_nvm_validate()
92 	image_size = nvm->buf_data_size;  in intel_switch_nvm_validate()
100 		return -EINVAL;  in intel_switch_nvm_validate()
104 		return -EINVAL;  in intel_switch_nvm_validate()
112 		return -EINVAL;  in intel_switch_nvm_validate()
114 	if (sw->safe_mode)  in intel_switch_nvm_validate()
122 	if (device_id != sw->config.device_id)  in intel_switch_nvm_validate()
123 		return -EINVAL;  in intel_switch_nvm_validate()
126 	nvm->buf_data_start = buf + hdr_size;  in intel_switch_nvm_validate()
127 	nvm->buf_data_size = image_size - hdr_size;  in intel_switch_nvm_validate()
134 	struct tb_switch *sw = tb_to_switch(nvm->dev);  in intel_switch_nvm_write_headers()
136 	if (sw->generation < 3) {  in intel_switch_nvm_write_headers()
140 		ret = dma_port_flash_write(sw->dma_port,  in intel_switch_nvm_write_headers()
141 			DMA_PORT_CSS_ADDRESS, nvm->buf + INTEL_NVM_CSS,  in intel_switch_nvm_write_headers()
158 	struct tb_switch *sw = tb_to_switch(nvm->dev);  in asmedia_switch_nvm_version()
166 	nvm->major = (val << 16) & 0xff0000;  in asmedia_switch_nvm_version()
167 	nvm->major |= val & 0x00ff00;  in asmedia_switch_nvm_version()
168 	nvm->major |= (val >> 16) & 0x0000ff;  in asmedia_switch_nvm_version()
174 	nvm->minor = (val << 16) & 0xff0000;  in asmedia_switch_nvm_version()
175 	nvm->minor |= val & 0x00ff00;  in asmedia_switch_nvm_version()
176 	nvm->minor |= (val >> 16) & 0x0000ff;  in asmedia_switch_nvm_version()
179 	nvm->active_size = SZ_512K;  in asmedia_switch_nvm_version()
197 	struct tb_retimer *rt = tb_to_retimer(nvm->dev);  in intel_retimer_nvm_version()
205 	nvm->major = (val >> 16) & 0xff;  in intel_retimer_nvm_version()
206 	nvm->minor = (val >> 8) & 0xff;  in intel_retimer_nvm_version()
213 	nvm_size = (nvm_size - SZ_16K) / 2;  in intel_retimer_nvm_version()
214 	nvm->active_size = nvm_size;  in intel_retimer_nvm_version()
221 	struct tb_retimer *rt = tb_to_retimer(nvm->dev);  in intel_retimer_nvm_validate()
223 	u8 *buf = nvm->buf;  in intel_retimer_nvm_validate()
226 	image_size = nvm->buf_data_size;  in intel_retimer_nvm_validate()
234 		return -EINVAL;  in intel_retimer_nvm_validate()
238 		return -EINVAL;  in intel_retimer_nvm_validate()
246 		return -EINVAL;  in intel_retimer_nvm_validate()
253 	if (device != rt->device)  in intel_retimer_nvm_validate()
254 		return -EINVAL;  in intel_retimer_nvm_validate()
257 	nvm->buf_data_start = buf + hdr_size;  in intel_retimer_nvm_validate()
258 	nvm->buf_data_size = image_size - hdr_size;  in intel_retimer_nvm_validate()
274  * tb_nvm_alloc() - Allocate new NVM structure
278  * of error returns ERR_PTR(). Specifically returns %-EOPNOTSUPP if the
293 			if (v->vendor == sw->config.vendor_id) {  in tb_nvm_alloc()
294 				vops = v->vops;  in tb_nvm_alloc()
301 				  sw->config.vendor_id);  in tb_nvm_alloc()
302 			return ERR_PTR(-EOPNOTSUPP);  in tb_nvm_alloc()
310 			if (v->vendor == rt->vendor) {  in tb_nvm_alloc()
311 				vops = v->vops;  in tb_nvm_alloc()
318 				rt->vendor);  in tb_nvm_alloc()
319 			return ERR_PTR(-EOPNOTSUPP);  in tb_nvm_alloc()
322 		return ERR_PTR(-EOPNOTSUPP);  in tb_nvm_alloc()
327 		return ERR_PTR(-ENOMEM);  in tb_nvm_alloc()
335 	nvm->id = ret;  in tb_nvm_alloc()
336 	nvm->dev = dev;  in tb_nvm_alloc()
337 	nvm->vops = vops;  in tb_nvm_alloc()
343  * tb_nvm_read_version() - Read and populate NVM version
347  * active NVM version. Returns %0 in case of success and negative errno
352 	const struct tb_nvm_vendor_ops *vops = nvm->vops;  in tb_nvm_read_version()
354 	if (vops && vops->read_version)  in tb_nvm_read_version()
355 		return vops->read_version(nvm);  in tb_nvm_read_version()
357 	return -EOPNOTSUPP;  in tb_nvm_read_version()
361  * tb_nvm_validate() - Validate new NVM image
365  * checks pass returns %0. As side effect updates @nvm->buf_data_start
366  * and @nvm->buf_data_size fields to match the actual data to be written
369  * If the validation does not pass then returns negative errno.
373 	const struct tb_nvm_vendor_ops *vops = nvm->vops;  in tb_nvm_validate()
375 	u8 *buf = nvm->buf;  in tb_nvm_validate()
378 		return -EINVAL;  in tb_nvm_validate()
380 		return -EOPNOTSUPP;  in tb_nvm_validate()
383 	image_size = nvm->buf_data_size;  in tb_nvm_validate()
385 		return -EINVAL;  in tb_nvm_validate()
391 	nvm->buf_data_start = buf;  in tb_nvm_validate()
393 	return vops->validate ? vops->validate(nvm) : 0;  in tb_nvm_validate()
397  * tb_nvm_write_headers() - Write headers before the rest of the image
404  * Returns %0 in case of success and negative errno otherwise.
408 	const struct tb_nvm_vendor_ops *vops = nvm->vops;  in tb_nvm_write_headers()
410 	return vops->write_headers ? vops->write_headers(nvm) : 0;  in tb_nvm_write_headers()
414  * tb_nvm_add_active() - Adds active NVMem device to NVM
422  * Returns %0 in success and negative errno otherwise.
434 	config.id = nvm->id;  in tb_nvm_add_active()
437 	config.size = nvm->active_size;  in tb_nvm_add_active()
438 	config.dev = nvm->dev;  in tb_nvm_add_active()
446 	nvm->active = nvmem;  in tb_nvm_add_active()
451  * tb_nvm_write_buf() - Write data to @nvm buffer
458  * written to the flash. Copies @bytes from @val to @nvm->buf starting
464 	if (!nvm->buf) {  in tb_nvm_write_buf()
465 		nvm->buf = vmalloc(NVM_MAX_SIZE);  in tb_nvm_write_buf()
466 		if (!nvm->buf)  in tb_nvm_write_buf()
467 			return -ENOMEM;  in tb_nvm_write_buf()
470 	nvm->flushed = false;  in tb_nvm_write_buf()
471 	nvm->buf_data_size = offset + bytes;  in tb_nvm_write_buf()
472 	memcpy(nvm->buf + offset, val, bytes);  in tb_nvm_write_buf()
477  * tb_nvm_add_non_active() - Adds non-active NVMem device to NVM
482  * Registers new non-active NVmem device for @nvm. The @reg_write is called
487  * Returns %0 in success and negative errno otherwise.
499 	config.id = nvm->id;  in tb_nvm_add_non_active()
503 	config.dev = nvm->dev;  in tb_nvm_add_non_active()
511 	nvm->non_active = nvmem;  in tb_nvm_add_non_active()
516  * tb_nvm_free() - Release NVM and its resources
524 		nvmem_unregister(nvm->non_active);  in tb_nvm_free()
525 		nvmem_unregister(nvm->active);  in tb_nvm_free()
526 		vfree(nvm->buf);  in tb_nvm_free()
527 		ida_simple_remove(&nvm_ida, nvm->id);  in tb_nvm_free()
533  * tb_nvm_read_data() - Read data from NVM
544  * Returns %0 on success and negative errno otherwise.
564 			if (ret != -ENODEV && retries--)  in tb_nvm_read_data()
569 		nbytes -= offset;  in tb_nvm_read_data()
572 		size -= nbytes;  in tb_nvm_read_data()
581  * tb_nvm_write_data() - Write data to NVM
591  * Returns %0 on success and negative errno otherwise.
611 			if (ret == -ETIMEDOUT) {  in tb_nvm_write_data()
612 				if (retries--)  in tb_nvm_write_data()
614 				ret = -EIO;  in tb_nvm_write_data()
619 		size -= nbytes;  in tb_nvm_write_data()