From da858deab88eb561f2196bc99b6dbd2320e56456 Mon Sep 17 00:00:00 2001 From: Luben Tuikov Date: Mon, 7 Nov 2022 12:06:44 -0500 Subject: drm/amdgpu: Remove redundant I2C EEPROM address Remove redundant EEPROM_I2C_MADDR_54H address, since we already have it represented (ARCTURUS), and since we don't include the I2C device type identifier in EEPROM memory addresses, i.e. that high up in the device abstraction--we only use EEPROM memory addresses, as memory is continuously represented by EEPROM device(s) on the I2C bus. Add a comment describing what these memory addresses are, how they come about and how they're usually extracted from the device address byte. Cc: Candice Li Cc: Tao Zhou Cc: Alex Deucher Fixes: c9bdc6c3cf39df ("drm/amdgpu: Add EEPROM I2C address support for ip discovery") Signed-off-by: Luben Tuikov Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c index 7268ae65c140..1bb92a64f24a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c @@ -33,12 +33,30 @@ #include "amdgpu_reset.h" +/* These are memory addresses as would be seen by one or more EEPROM + * chips strung on the I2C bus, usually by manipulating pins 1-3 of a + * set of EEPROM devices. They form a continuous memory space. + * + * The I2C device address includes the device type identifier, 1010b, + * which is a reserved value and indicates that this is an I2C EEPROM + * device. It also includes the top 3 bits of the 19 bit EEPROM memory + * address, namely bits 18, 17, and 16. This makes up the 7 bit + * address sent on the I2C bus with bit 0 being the direction bit, + * which is not represented here, and sent by the hardware directly. + * + * For instance, + * 50h = 1010000b => device type identifier 1010b, bits 18:16 = 000b, address 0. + * 54h = 1010100b => --"--, bits 18:16 = 100b, address 40000h. + * 56h = 1010110b => --"--, bits 18:16 = 110b, address 60000h. + * Depending on the size of the I2C EEPROM device(s), bits 18:16 may + * address memory in a device or a device on the I2C bus, depending on + * the status of pins 1-3. See top of amdgpu_eeprom.c. + */ #define EEPROM_I2C_MADDR_VEGA20 0x0 #define EEPROM_I2C_MADDR_ARCTURUS 0x40000 #define EEPROM_I2C_MADDR_ARCTURUS_D342 0x0 #define EEPROM_I2C_MADDR_SIENNA_CICHLID 0x0 #define EEPROM_I2C_MADDR_ALDEBARAN 0x0 -#define EEPROM_I2C_MADDR_54H (0x54UL << 16) /* * The 2 macros bellow represent the actual size in bytes that @@ -130,7 +148,7 @@ static bool __get_eeprom_i2c_addr_ip_discovery(struct amdgpu_device *adev, switch (adev->ip_versions[MP1_HWIP][0]) { case IP_VERSION(13, 0, 0): case IP_VERSION(13, 0, 10): - control->i2c_address = EEPROM_I2C_MADDR_54H; + control->i2c_address = EEPROM_I2C_MADDR_ARCTURUS; return true; default: return false; @@ -185,7 +203,7 @@ static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev, switch (adev->ip_versions[MP1_HWIP][0]) { case IP_VERSION(13, 0, 0): - control->i2c_address = EEPROM_I2C_MADDR_54H; + control->i2c_address = EEPROM_I2C_MADDR_ARCTURUS; break; default: -- cgit v1.2.3-70-g09d2 From 3b8164f8084ff7888ed24970efa230ff5d36eda8 Mon Sep 17 00:00:00 2001 From: Luben Tuikov Date: Mon, 7 Nov 2022 12:38:03 -0500 Subject: drm/amdgpu: Decouple RAS EEPROM addresses from chips Abstract RAS I2C EEPROM addresses from chip names, and set their macro definition names to the address they set, not the chip they attach to. Since most chips either use I2C EEPROM address 0 or 40000h for the RAS table start offset, this leaves us with only two macro definitions as opposed to five, and removes the redundancy of four. Cc: Candice Li Cc: Tao Zhou Cc: Alex Deucher Signed-off-by: Luben Tuikov Reviewed-by: Kent Russell Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c index 1bb92a64f24a..f63bd31e199c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c @@ -51,12 +51,11 @@ * Depending on the size of the I2C EEPROM device(s), bits 18:16 may * address memory in a device or a device on the I2C bus, depending on * the status of pins 1-3. See top of amdgpu_eeprom.c. + * + * The RAS table lives either at address 0 or address 40000h of EEPROM. */ -#define EEPROM_I2C_MADDR_VEGA20 0x0 -#define EEPROM_I2C_MADDR_ARCTURUS 0x40000 -#define EEPROM_I2C_MADDR_ARCTURUS_D342 0x0 -#define EEPROM_I2C_MADDR_SIENNA_CICHLID 0x0 -#define EEPROM_I2C_MADDR_ALDEBARAN 0x0 +#define EEPROM_I2C_MADDR_0 0x0 +#define EEPROM_I2C_MADDR_4 0x40000 /* * The 2 macros bellow represent the actual size in bytes that @@ -135,9 +134,9 @@ static bool __get_eeprom_i2c_addr_arct(struct amdgpu_device *adev, if (strnstr(atom_ctx->vbios_version, "D342", sizeof(atom_ctx->vbios_version))) - control->i2c_address = EEPROM_I2C_MADDR_ARCTURUS_D342; + control->i2c_address = EEPROM_I2C_MADDR_0; else - control->i2c_address = EEPROM_I2C_MADDR_ARCTURUS; + control->i2c_address = EEPROM_I2C_MADDR_4; return true; } @@ -148,7 +147,7 @@ static bool __get_eeprom_i2c_addr_ip_discovery(struct amdgpu_device *adev, switch (adev->ip_versions[MP1_HWIP][0]) { case IP_VERSION(13, 0, 0): case IP_VERSION(13, 0, 10): - control->i2c_address = EEPROM_I2C_MADDR_ARCTURUS; + control->i2c_address = EEPROM_I2C_MADDR_4; return true; default: return false; @@ -180,18 +179,18 @@ static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev, switch (adev->asic_type) { case CHIP_VEGA20: - control->i2c_address = EEPROM_I2C_MADDR_VEGA20; + control->i2c_address = EEPROM_I2C_MADDR_0; break; case CHIP_ARCTURUS: return __get_eeprom_i2c_addr_arct(adev, control); case CHIP_SIENNA_CICHLID: - control->i2c_address = EEPROM_I2C_MADDR_SIENNA_CICHLID; + control->i2c_address = EEPROM_I2C_MADDR_0; break; case CHIP_ALDEBARAN: - control->i2c_address = EEPROM_I2C_MADDR_ALDEBARAN; + control->i2c_address = EEPROM_I2C_MADDR_0; break; case CHIP_IP_DISCOVERY: @@ -203,7 +202,7 @@ static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev, switch (adev->ip_versions[MP1_HWIP][0]) { case IP_VERSION(13, 0, 0): - control->i2c_address = EEPROM_I2C_MADDR_ARCTURUS; + control->i2c_address = EEPROM_I2C_MADDR_4; break; default: -- cgit v1.2.3-70-g09d2 From 64a3dbb06ad88d89a0958ccafc4f01611657f641 Mon Sep 17 00:00:00 2001 From: Luben Tuikov Date: Tue, 15 Nov 2022 00:36:03 -0500 Subject: drm/amdgpu: Add support for RAS table at 0x40000 Add support for RAS table at I2C EEPROM address of 0x40000, since on some ASICs it is not at 0, but at 0x40000. Cc: Alex Deucher Cc: Kent Russell Signed-off-by: Luben Tuikov Tested-by: Kent Russell Reviewed-by: Kent Russell Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c index f63bd31e199c..2d9f3f4cd79e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c @@ -157,6 +157,7 @@ static bool __get_eeprom_i2c_addr_ip_discovery(struct amdgpu_device *adev, static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev, struct amdgpu_ras_eeprom_control *control) { + struct atom_context *atom_ctx = adev->mode_info.atom_context; u8 i2c_addr; if (!control) @@ -190,7 +191,11 @@ static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev, break; case CHIP_ALDEBARAN: - control->i2c_address = EEPROM_I2C_MADDR_0; + if (strnstr(atom_ctx->vbios_version, "D673", + sizeof(atom_ctx->vbios_version))) + control->i2c_address = EEPROM_I2C_MADDR_4; + else + control->i2c_address = EEPROM_I2C_MADDR_0; break; case CHIP_IP_DISCOVERY: -- cgit v1.2.3-70-g09d2