drm/amdgpu: Move EEPROM I2C adapter to amdgpu_device

Puts the i2c adapter in common place for sharing by RAS
and upcoming data read from FRU EEPROM feature.

v2:
Move i2c adapter to amdgpu_pm and rename it.

v3: Move i2c adapter init to ASIC specific code and get rid
of the switch case in amdgpu_device

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h

@@ -448,6 +448,8 @@ struct amdgpu_pm {
 	/* powerplay feature */
 	uint32_t pp_feature;
 
+	/* Used for I2C access to various EEPROMs on relevant ASICs */
+	struct i2c_adapter smu_i2c;
 };
 
 #define R600_SSTU_DFLT                               0

drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c

@@ -25,7 +25,6 @@
 #include "amdgpu.h"
 #include "amdgpu_ras.h"
 #include <linux/bits.h>
-#include "smu_v11_0_i2c.h"
 #include "atom.h"
 
 #define EEPROM_I2C_TARGET_ADDR_VEGA20    	0xA0
@@ -124,6 +123,7 @@ static int __update_table_header(struct amdgpu_ras_eeprom_control *control,
 				 unsigned char *buff)
 {
 	int ret = 0;
+	struct amdgpu_device *adev = to_amdgpu_device(control);
 	struct i2c_msg msg = {
 			.addr	= 0,
 			.flags	= 0,
@@ -137,7 +137,7 @@ static int __update_table_header(struct amdgpu_ras_eeprom_control *control,
 
 	msg.addr = control->i2c_address;
 
-	ret = i2c_transfer(&control->eeprom_accessor, &msg, 1);
+	ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1);
 	if (ret < 1)
 		DRM_ERROR("Failed to write EEPROM table header, ret:%d", ret);
 
@@ -251,33 +251,18 @@ int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control)
 			.buf	= buff,
 	};
 
+	/* Verify i2c adapter is initialized */
+	if (!adev->pm.smu_i2c.algo)
+		return -ENOENT;
+
 	if (!__get_eeprom_i2c_addr(adev, &control->i2c_address))
 		return -EINVAL;
 
 	mutex_init(&control->tbl_mutex);
 
-	switch (adev->asic_type) {
-	case CHIP_VEGA20:
-		ret = smu_v11_0_i2c_eeprom_control_init(&control->eeprom_accessor);
-		break;
-
-	case CHIP_ARCTURUS:
-		ret = smu_i2c_eeprom_init(&adev->smu, &control->eeprom_accessor);
-		break;
-
-	default:
-		return 0;
-	}
-
-	if (ret) {
-		DRM_ERROR("Failed to init I2C controller, ret:%d", ret);
-		return ret;
-	}
-
 	msg.addr = control->i2c_address;
-
 	/* Read/Create table header from EEPROM address 0 */
-	ret = i2c_transfer(&control->eeprom_accessor, &msg, 1);
+	ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1);
 	if (ret < 1) {
 		DRM_ERROR("Failed to read EEPROM table header, ret:%d", ret);
 		return ret;
@@ -303,23 +288,6 @@ int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control)
 	return ret == 1 ? 0 : -EIO;
 }
 
-void amdgpu_ras_eeprom_fini(struct amdgpu_ras_eeprom_control *control)
-{
-	struct amdgpu_device *adev = to_amdgpu_device(control);
-
-	switch (adev->asic_type) {
-	case CHIP_VEGA20:
-		smu_v11_0_i2c_eeprom_control_fini(&control->eeprom_accessor);
-		break;
-	case CHIP_ARCTURUS:
-		smu_i2c_eeprom_fini(&adev->smu, &control->eeprom_accessor);
-		break;
-
-	default:
-		return;
-	}
-}
-
 static void __encode_table_record_to_buff(struct amdgpu_ras_eeprom_control *control,
 					  struct eeprom_table_record *record,
 					  unsigned char *buff)
@@ -476,7 +444,7 @@ int amdgpu_ras_eeprom_process_recods(struct amdgpu_ras_eeprom_control *control,
 		control->next_addr += EEPROM_TABLE_RECORD_SIZE;
 	}
 
-	ret = i2c_transfer(&control->eeprom_accessor, msgs, num);
+	ret = i2c_transfer(&adev->pm.smu_i2c, msgs, num);
 	if (ret < 1) {
 		DRM_ERROR("Failed to process EEPROM table records, ret:%d", ret);
 

drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.h

@@ -44,7 +44,6 @@ struct amdgpu_ras_eeprom_table_header {
 
 struct amdgpu_ras_eeprom_control {
 	struct amdgpu_ras_eeprom_table_header tbl_hdr;
-	struct i2c_adapter eeprom_accessor;
 	uint32_t next_addr;
 	unsigned int num_recs;
 	struct mutex tbl_mutex;
@@ -79,7 +78,6 @@ struct eeprom_table_record {
 }__attribute__((__packed__));
 
 int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control);
-void amdgpu_ras_eeprom_fini(struct amdgpu_ras_eeprom_control *control);
 int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control);
 
 int amdgpu_ras_eeprom_process_recods(struct amdgpu_ras_eeprom_control *control,

drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c

@@ -46,8 +46,7 @@
 #define I2C_NO_STOP	1
 #define I2C_RESTART	2
 
-#define to_amdgpu_device(x) (container_of(x, struct amdgpu_ras, eeprom_control.eeprom_accessor))->adev
+#define to_amdgpu_device(x) (container_of(x, struct amdgpu_device, pm.smu_i2c))
-#define to_eeprom_control(x) container_of(x, struct amdgpu_ras_eeprom_control, eeprom_accessor)
 
 static void smu_v11_0_i2c_set_clock_gating(struct i2c_adapter *control, bool en)
 {
@@ -592,7 +591,8 @@ static uint32_t smu_v11_0_i2c_eeprom_write_data(struct i2c_adapter *control,
 
 static void lock_bus(struct i2c_adapter *i2c, unsigned int flags)
 {
-	struct amdgpu_ras_eeprom_control *control = to_eeprom_control(i2c);
+	struct amdgpu_device *adev = to_amdgpu_device(i2c);
+	struct amdgpu_ras_eeprom_control *control = &adev->psp.ras.ras->eeprom_control;
 
 	if (!smu_v11_0_i2c_bus_lock(i2c)) {
 		DRM_ERROR("Failed to lock the bus from SMU");
@@ -610,7 +610,8 @@ static int trylock_bus(struct i2c_adapter *i2c, unsigned int flags)
 
 static void unlock_bus(struct i2c_adapter *i2c, unsigned int flags)
 {
-	struct amdgpu_ras_eeprom_control *control = to_eeprom_control(i2c);
+	struct amdgpu_device *adev = to_amdgpu_device(i2c);
+	struct amdgpu_ras_eeprom_control *control = &adev->psp.ras.ras->eeprom_control;
 
 	if (!smu_v11_0_i2c_bus_unlock(i2c)) {
 		DRM_ERROR("Failed to unlock the bus from SMU");
@@ -630,7 +631,8 @@ static int smu_v11_0_i2c_eeprom_i2c_xfer(struct i2c_adapter *i2c_adap,
 			      struct i2c_msg *msgs, int num)
 {
 	int i, ret;
-	struct amdgpu_ras_eeprom_control *control = to_eeprom_control(i2c_adap);
+	struct amdgpu_device *adev = to_amdgpu_device(i2c_adap);
+	struct amdgpu_ras_eeprom_control *control = &adev->psp.ras.ras->eeprom_control;
 
 	if (!control->bus_locked) {
 		DRM_ERROR("I2C bus unlocked, stopping transaction!");
@@ -679,7 +681,7 @@ int smu_v11_0_i2c_eeprom_control_init(struct i2c_adapter *control)
 	control->class = I2C_CLASS_SPD;
 	control->dev.parent = &adev->pdev->dev;
 	control->algo = &smu_v11_0_i2c_eeprom_i2c_algo;
-	snprintf(control->name, sizeof(control->name), "RAS EEPROM");
+	snprintf(control->name, sizeof(control->name), "AMDGPU EEPROM");
 	control->lock_ops = &smu_v11_0_i2c_i2c_lock_ops;
 
 	res = i2c_add_adapter(control);

drivers/gpu/drm/amd/powerplay/amdgpu_smu.c

@@ -932,6 +932,13 @@ static int smu_sw_init(void *handle)
 		return ret;
 	}
 
+	if (adev->smu.ppt_funcs->i2c_eeprom_init) {
+		ret = smu_i2c_eeprom_init(smu, &adev->pm.smu_i2c);
+
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }
 
@@ -941,6 +948,9 @@ static int smu_sw_fini(void *handle)
 	struct smu_context *smu = &adev->smu;
 	int ret;
 
+	if (adev->smu.ppt_funcs->i2c_eeprom_fini)
+		smu_i2c_eeprom_fini(smu, &adev->pm.smu_i2c);
+
 	kfree(smu->irq_source);
 	smu->irq_source = NULL;
 

drivers/gpu/drm/amd/powerplay/arcturus_ppt.c

@@ -41,7 +41,7 @@
 #include <linux/pci.h>
 #include "amdgpu_ras.h"
 
-#define to_amdgpu_device(x) (container_of(x, struct amdgpu_ras, eeprom_control.eeprom_accessor))->adev
+#define to_amdgpu_device(x) (container_of(x, struct amdgpu_device, pm.smu_i2c))
 
 #define CTF_OFFSET_EDGE			5
 #define CTF_OFFSET_HOTSPOT		5
@@ -2190,7 +2190,7 @@ static int arcturus_i2c_eeprom_control_init(struct i2c_adapter *control)
 	control->class = I2C_CLASS_SPD;
 	control->dev.parent = &adev->pdev->dev;
 	control->algo = &arcturus_i2c_eeprom_i2c_algo;
-	snprintf(control->name, sizeof(control->name), "RAS EEPROM");
+	snprintf(control->name, sizeof(control->name), "AMDGPU EEPROM");
 
 	res = i2c_add_adapter(control);
 	if (res)

drivers/gpu/drm/amd/powerplay/smumgr/vega20_smumgr.c

@@ -33,6 +33,8 @@
 #include "smu7_smumgr.h"
 #include "vega20_hwmgr.h"
 
+#include "smu_v11_0_i2c.h"
+
 /* MP Apertures */
 #define MP0_Public			0x03800000
 #define MP0_SRAM			0x03900000
@@ -406,6 +408,7 @@ static int vega20_smu_init(struct pp_hwmgr *hwmgr)
 	struct vega20_smumgr *priv;
 	unsigned long tools_size = 0x19000;
 	int ret = 0;
+	struct amdgpu_device *adev = hwmgr->adev;
 
 	struct cgs_firmware_info info = {0};
 
@@ -505,6 +508,10 @@ static int vega20_smu_init(struct pp_hwmgr *hwmgr)
 	priv->smu_tables.entry[TABLE_ACTIVITY_MONITOR_COEFF].version = 0x01;
 	priv->smu_tables.entry[TABLE_ACTIVITY_MONITOR_COEFF].size = sizeof(DpmActivityMonitorCoeffInt_t);
 
+	ret = smu_v11_0_i2c_eeprom_control_init(&adev->pm.smu_i2c);
+	if (ret)
+		goto err4;
+
 	return 0;
 
 err4:
@@ -537,6 +544,9 @@ static int vega20_smu_fini(struct pp_hwmgr *hwmgr)
 {
 	struct vega20_smumgr *priv =
 			(struct vega20_smumgr *)(hwmgr->smu_backend);
+	struct amdgpu_device *adev = hwmgr->adev;
+
+	smu_v11_0_i2c_eeprom_control_fini(&adev->pm.smu_i2c);
 
 	if (priv) {
 		amdgpu_bo_free_kernel(&priv->smu_tables.entry[TABLE_PPTABLE].handle,
@@ -560,6 +570,7 @@ static int vega20_smu_fini(struct pp_hwmgr *hwmgr)
 		kfree(hwmgr->smu_backend);
 		hwmgr->smu_backend = NULL;
 	}
+
 	return 0;
 }