[linux-block.git] / drivers / gpu / drm / amd / amdgpu / amdgpu_fru_eeprom.c

/*
 * Copyright 2019 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */
#include <linux/pci.h>

#include "amdgpu.h"
#include "amdgpu_i2c.h"
#include "smu_v11_0_i2c.h"
#include "atom.h"
#include "amdgpu_fru_eeprom.h"
#include "amdgpu_eeprom.h"

#define FRU_EEPROM_MADDR        0x60000

static bool is_fru_eeprom_supported(struct amdgpu_device *adev)
{
	/* Only server cards have the FRU EEPROM
	 * TODO: See if we can figure this out dynamically instead of
	 * having to parse VBIOS versions.
	 */
	struct atom_context *atom_ctx = adev->mode_info.atom_context;

	/* The i2c access is blocked on VF
	 * TODO: Need other way to get the info
	 */
	if (amdgpu_sriov_vf(adev))
		return false;

	/* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
	 * we can use just the "DXXX" portion. If there were more models, we
	 * could convert the 3 characters to a hex integer and use a switch
	 * for ease/speed/readability. For now, 2 string comparisons are
	 * reasonable and not too expensive
	 */
	switch (adev->asic_type) {
	case CHIP_VEGA20:
		/* D161 and D163 are the VG20 server SKUs */
		if (strnstr(atom_ctx->vbios_version, "D161",
			    sizeof(atom_ctx->vbios_version)) ||
		    strnstr(atom_ctx->vbios_version, "D163",
			    sizeof(atom_ctx->vbios_version)))
			return true;
		else
			return false;
	case CHIP_ALDEBARAN:
		/* All Aldebaran SKUs have the FRU */
		return true;
	case CHIP_SIENNA_CICHLID:
		if (strnstr(atom_ctx->vbios_version, "D603",
			    sizeof(atom_ctx->vbios_version)))
			return true;
		else
			return false;
	default:
		return false;
	}
}

static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr,
				  unsigned char *buf, size_t buf_size)
{
	int ret;
	u8 size;

	ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr, buf, 1);
	if (ret < 1) {
		DRM_WARN("FRU: Failed to get size field");
		return ret;
	}

	/* The size returned by the i2c requires subtraction of 0xC0 since the
	 * size apparently always reports as 0xC0+actual size.
	 */
	size = buf[0] & 0x3F;
	size = min_t(size_t, size, buf_size);

	ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr + 1,
				 buf, size);
	if (ret < 1) {
		DRM_WARN("FRU: Failed to get data field");
		return ret;
	}

	return size;
}

int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
{
	unsigned char buf[AMDGPU_PRODUCT_NAME_LEN];
	u32 addrptr;
	int size, len;

	if (!is_fru_eeprom_supported(adev))
		return 0;

	/* If algo exists, it means that the i2c_adapter's initialized */
	if (!adev->pm.fru_eeprom_i2c_bus || !adev->pm.fru_eeprom_i2c_bus->algo) {
		DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
		return -ENODEV;
	}

	/* There's a lot of repetition here. This is due to the FRU having
	 * variable-length fields. To get the information, we have to find the
	 * size of each field, and then keep reading along and reading along
	 * until we get all of the data that we want. We use addrptr to track
	 * the address as we go
	 */

	/* The first fields are all of size 1-byte, from 0-7 are offsets that
	 * contain information that isn't useful to us.
	 * Bytes 8-a are all 1-byte and refer to the size of the entire struct,
	 * and the language field, so just start from 0xb, manufacturer size
	 */
	addrptr = FRU_EEPROM_MADDR + 0xb;
	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
	if (size < 1) {
		DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size);
		return -EINVAL;
	}

	/* Increment the addrptr by the size of the field, and 1 due to the
	 * size field being 1 byte. This pattern continues below.
	 */
	addrptr += size + 1;
	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
	if (size < 1) {
		DRM_ERROR("Failed to read FRU product name, ret:%d", size);
		return -EINVAL;
	}

	len = size;
	if (len >= AMDGPU_PRODUCT_NAME_LEN) {
		DRM_WARN("FRU Product Name is larger than %d characters. This is likely a mistake",
				AMDGPU_PRODUCT_NAME_LEN);
		len = AMDGPU_PRODUCT_NAME_LEN - 1;
	}
	memcpy(adev->product_name, buf, len);
	adev->product_name[len] = '\0';

	addrptr += size + 1;
	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
	if (size < 1) {
		DRM_ERROR("Failed to read FRU product number, ret:%d", size);
		return -EINVAL;
	}

	len = size;
	/* Product number should only be 16 characters. Any more,
	 * and something could be wrong. Cap it at 16 to be safe
	 */
	if (len >= sizeof(adev->product_number)) {
		DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
		len = sizeof(adev->product_number) - 1;
	}
	memcpy(adev->product_number, buf, len);
	adev->product_number[len] = '\0';

	addrptr += size + 1;
	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));

	if (size < 1) {
		DRM_ERROR("Failed to read FRU product version, ret:%d", size);
		return -EINVAL;
	}

	addrptr += size + 1;
	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));

	if (size < 1) {
		DRM_ERROR("Failed to read FRU serial number, ret:%d", size);
		return -EINVAL;
	}

	len = size;
	/* Serial number should only be 16 characters. Any more,
	 * and something could be wrong. Cap it at 16 to be safe
	 */
	if (len >= sizeof(adev->serial)) {
		DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
		len = sizeof(adev->serial) - 1;
	}
	memcpy(adev->serial, buf, len);
	adev->serial[len] = '\0';

	return 0;
}
Commit	Line	Data
bd607166 KR	1	/*
	2	* Copyright 2019 Advanced Micro Devices, Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	*/
1ea2b260 KR	23	#include <linux/pci.h>
1ea2b260 KR	24
bd607166 KR	25	#include "amdgpu.h"
	26	#include "amdgpu_i2c.h"
	27	#include "smu_v11_0_i2c.h"
	28	#include "atom.h"
d43f7ff6	29	#include "amdgpu_fru_eeprom.h"
25e5c09f	30	#include "amdgpu_eeprom.h"
bd607166	31
ccdfbfec	32	#define FRU_EEPROM_MADDR 0x60000
bd607166	33
f3167919	34	static bool is_fru_eeprom_supported(struct amdgpu_device *adev)
fabe01d7	35	{
f94582e4 KR	36	/* Only server cards have the FRU EEPROM
	37	* TODO: See if we can figure this out dynamically instead of
	38	* having to parse VBIOS versions.
1ea2b260	39	*/
f94582e4 KR	40	struct atom_context *atom_ctx = adev->mode_info.atom_context;
f94582e4 KR	41
901abf36	42	/* The i2c access is blocked on VF
	43	* TODO: Need other way to get the info
	44	*/
	45	if (amdgpu_sriov_vf(adev))
	46	return false;
	47
3ed89339	48	/* VBIOS is of the format ###-DXXXYYYY-##. For SKU identification,
f94582e4 KR	49	* we can use just the "DXXX" portion. If there were more models, we
	50	* could convert the 3 characters to a hex integer and use a switch
	51	* for ease/speed/readability. For now, 2 string comparisons are
	52	* reasonable and not too expensive
	53	*/
	54	switch (adev->asic_type) {
	55	case CHIP_VEGA20:
	56	/* D161 and D163 are the VG20 server SKUs */
	57	if (strnstr(atom_ctx->vbios_version, "D161",
	58	sizeof(atom_ctx->vbios_version)) \|\|
	59	strnstr(atom_ctx->vbios_version, "D163",
	60	sizeof(atom_ctx->vbios_version)))
	61	return true;
	62	else
	63	return false;
67416bf8 KR	64	case CHIP_ALDEBARAN:
	65	/* All Aldebaran SKUs have the FRU */
	66	return true;
3ed89339 LT	67	case CHIP_SIENNA_CICHLID:
	68	if (strnstr(atom_ctx->vbios_version, "D603",
	69	sizeof(atom_ctx->vbios_version)))
	70	return true;
	71	else
	72	return false;
f94582e4 KR	73	default:
	74	return false;
	75	}
fabe01d7 JC	76	}
fabe01d7 JC	77
f3167919	78	static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr,
00b14ce0	79	unsigned char *buf, size_t buf_size)
bd607166	80	{
00b14ce0 LT	81	int ret;
00b14ce0 LT	82	u8 size;
bd607166	83
3f1e2e9d	84	ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr, buf, 1);
bd607166 KR	85	if (ret < 1) {
	86	DRM_WARN("FRU: Failed to get size field");
	87	return ret;
	88	}
	89
	90	/* The size returned by the i2c requires subtraction of 0xC0 since the
	91	* size apparently always reports as 0xC0+actual size.
	92	*/
00b14ce0 LT	93	size = buf[0] & 0x3F;
00b14ce0 LT	94	size = min_t(size_t, size, buf_size);
bd607166	95
00b14ce0 LT	96	ret = amdgpu_eeprom_read(adev->pm.fru_eeprom_i2c_bus, addrptr + 1,
00b14ce0 LT	97	buf, size);
bd607166 KR	98	if (ret < 1) {
	99	DRM_WARN("FRU: Failed to get data field");
	100	return ret;
	101	}
	102
	103	return size;
	104	}
	105
	106	int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
	107	{
3f3a24a0	108	unsigned char buf[AMDGPU_PRODUCT_NAME_LEN];
ccdfbfec LT	109	u32 addrptr;
ccdfbfec LT	110	int size, len;
bd607166	111
fabe01d7 JC	112	if (!is_fru_eeprom_supported(adev))
	113	return 0;
	114
bd607166	115	/* If algo exists, it means that the i2c_adapter's initialized */
2f60dd50	116	if (!adev->pm.fru_eeprom_i2c_bus \|\| !adev->pm.fru_eeprom_i2c_bus->algo) {
bd607166	117	DRM_WARN("Cannot access FRU, EEPROM accessor not initialized");
02b865f8	118	return -ENODEV;
bd607166 KR	119	}
	120
	121	/* There's a lot of repetition here. This is due to the FRU having
	122	* variable-length fields. To get the information, we have to find the
	123	* size of each field, and then keep reading along and reading along
	124	* until we get all of the data that we want. We use addrptr to track
	125	* the address as we go
	126	*/
	127
	128	/* The first fields are all of size 1-byte, from 0-7 are offsets that
	129	* contain information that isn't useful to us.
	130	* Bytes 8-a are all 1-byte and refer to the size of the entire struct,
	131	* and the language field, so just start from 0xb, manufacturer size
	132	*/
ccdfbfec	133	addrptr = FRU_EEPROM_MADDR + 0xb;
00b14ce0	134	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
bd607166 KR	135	if (size < 1) {
bd607166 KR	136	DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size);
02b865f8	137	return -EINVAL;
bd607166 KR	138	}
	139
	140	/* Increment the addrptr by the size of the field, and 1 due to the
	141	* size field being 1 byte. This pattern continues below.
	142	*/
	143	addrptr += size + 1;
00b14ce0	144	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
bd607166 KR	145	if (size < 1) {
bd607166 KR	146	DRM_ERROR("Failed to read FRU product name, ret:%d", size);
02b865f8	147	return -EINVAL;
bd607166 KR	148	}
bd607166 KR	149
02b865f8	150	len = size;
6c92fe5f KR	151	if (len >= AMDGPU_PRODUCT_NAME_LEN) {
	152	DRM_WARN("FRU Product Name is larger than %d characters. This is likely a mistake",
	153	AMDGPU_PRODUCT_NAME_LEN);
	154	len = AMDGPU_PRODUCT_NAME_LEN - 1;
714309f0	155	}
3f3a24a0	156	memcpy(adev->product_name, buf, len);
02b865f8	157	adev->product_name[len] = '\0';
bd607166 KR	158
bd607166 KR	159	addrptr += size + 1;
00b14ce0	160	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
bd607166 KR	161	if (size < 1) {
bd607166 KR	162	DRM_ERROR("Failed to read FRU product number, ret:%d", size);
02b865f8	163	return -EINVAL;
bd607166 KR	164	}
bd607166 KR	165
02b865f8	166	len = size;
714309f0 KR	167	/* Product number should only be 16 characters. Any more,
	168	* and something could be wrong. Cap it at 16 to be safe
	169	*/
02b865f8	170	if (len >= sizeof(adev->product_number)) {
714309f0	171	DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake");
02b865f8	172	len = sizeof(adev->product_number) - 1;
714309f0	173	}
3f3a24a0	174	memcpy(adev->product_number, buf, len);
02b865f8	175	adev->product_number[len] = '\0';
bd607166 KR	176
bd607166 KR	177	addrptr += size + 1;
00b14ce0	178	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
bd607166 KR	179
	180	if (size < 1) {
	181	DRM_ERROR("Failed to read FRU product version, ret:%d", size);
02b865f8	182	return -EINVAL;
bd607166 KR	183	}
	184
	185	addrptr += size + 1;
00b14ce0	186	size = amdgpu_fru_read_eeprom(adev, addrptr, buf, sizeof(buf));
bd607166 KR	187
	188	if (size < 1) {
	189	DRM_ERROR("Failed to read FRU serial number, ret:%d", size);
02b865f8	190	return -EINVAL;
bd607166 KR	191	}
bd607166 KR	192
02b865f8	193	len = size;
714309f0 KR	194	/* Serial number should only be 16 characters. Any more,
	195	* and something could be wrong. Cap it at 16 to be safe
	196	*/
02b865f8	197	if (len >= sizeof(adev->serial)) {
714309f0	198	DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake");
02b865f8	199	len = sizeof(adev->serial) - 1;
714309f0	200	}
3f3a24a0	201	memcpy(adev->serial, buf, len);
02b865f8	202	adev->serial[len] = '\0';
bd607166 KR	203
	204	return 0;
	205	}