1 // SPDX-License-Identifier: GPL-2.0+
7 #include <linux/fsi-occ.h>
21 	struct occ occ;  member
30 #define to_p9_sbe_occ(x)	container_of((x), struct p9_sbe_occ, occ)
37 	struct occ *occ = dev_get_drvdata(kobj_to_dev(kobj));  in ffdc_read()  local
38 	struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ);  in ffdc_read()
40 	mutex_lock(&ctx->sbe_error_lock);  in ffdc_read()
41 	if (ctx->sbe_error) {  in ffdc_read()
42 		rc = memory_read_from_buffer(buf, count, &pos, ctx->ffdc,  in ffdc_read()
43 					     ctx->ffdc_len);  in ffdc_read()
44 		if (pos >= ctx->ffdc_len)  in ffdc_read()
45 			ctx->sbe_error = false;  in ffdc_read()
47 	mutex_unlock(&ctx->sbe_error_lock);  in ffdc_read()
58 	mutex_lock(&ctx->sbe_error_lock);  in p9_sbe_occ_save_ffdc()
59 	if (!ctx->sbe_error) {  in p9_sbe_occ_save_ffdc()
60 		if (resp_len > ctx->ffdc_size) {  in p9_sbe_occ_save_ffdc()
61 			kvfree(ctx->ffdc);  in p9_sbe_occ_save_ffdc()
62 			ctx->ffdc = kvmalloc(resp_len, GFP_KERNEL);  in p9_sbe_occ_save_ffdc()
63 			if (!ctx->ffdc) {  in p9_sbe_occ_save_ffdc()
64 				ctx->ffdc_len = 0;  in p9_sbe_occ_save_ffdc()
65 				ctx->ffdc_size = 0;  in p9_sbe_occ_save_ffdc()
69 			ctx->ffdc_size = resp_len;  in p9_sbe_occ_save_ffdc()
73 		ctx->sbe_error = true;  in p9_sbe_occ_save_ffdc()
74 		ctx->ffdc_len = resp_len;  in p9_sbe_occ_save_ffdc()
75 		memcpy(ctx->ffdc, resp, resp_len);  in p9_sbe_occ_save_ffdc()
79 	mutex_unlock(&ctx->sbe_error_lock);  in p9_sbe_occ_save_ffdc()
83 static int p9_sbe_occ_send_cmd(struct occ *occ, u8 *cmd, size_t len,  in p9_sbe_occ_send_cmd()  argument
87 	struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ);  in p9_sbe_occ_send_cmd()
91 		rc = fsi_occ_submit(ctx->sbe, cmd, len, resp, &resp_len);  in p9_sbe_occ_send_cmd()
96 				sysfs_notify(&occ->bus_dev->kobj, NULL,  in p9_sbe_occ_send_cmd()
100 		if (rc != -EBADE)  in p9_sbe_occ_send_cmd()
105 	switch (((struct occ_response *)resp)->return_status) {  in p9_sbe_occ_send_cmd()
107 		rc = -ETIMEDOUT;  in p9_sbe_occ_send_cmd()
116 		rc = -EINVAL;  in p9_sbe_occ_send_cmd()
125 		rc = -EREMOTEIO;  in p9_sbe_occ_send_cmd()
128 		rc = -EPROTO;  in p9_sbe_occ_send_cmd()
137 	struct occ *occ;  in p9_sbe_occ_probe()  local
138 	struct p9_sbe_occ *ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx),  in p9_sbe_occ_probe()
141 		return -ENOMEM;  in p9_sbe_occ_probe()
143 	mutex_init(&ctx->sbe_error_lock);  in p9_sbe_occ_probe()
145 	ctx->sbe = pdev->dev.parent;  in p9_sbe_occ_probe()
146 	occ = &ctx->occ;  in p9_sbe_occ_probe()
147 	occ->bus_dev = &pdev->dev;  in p9_sbe_occ_probe()
148 	platform_set_drvdata(pdev, occ);  in p9_sbe_occ_probe()
150 	occ->powr_sample_time_us = 500;  in p9_sbe_occ_probe()
151 	occ->poll_cmd_data = 0x20;		/* P9 OCC poll data */  in p9_sbe_occ_probe()
152 	occ->send_cmd = p9_sbe_occ_send_cmd;  in p9_sbe_occ_probe()
154 	rc = occ_setup(occ);  in p9_sbe_occ_probe()
155 	if (rc == -ESHUTDOWN)  in p9_sbe_occ_probe()
156 		rc = -ENODEV;	/* Host is shutdown, don't spew errors */  in p9_sbe_occ_probe()
159 		rc = device_create_bin_file(occ->bus_dev, &bin_attr_ffdc);  in p9_sbe_occ_probe()
161 			dev_warn(occ->bus_dev,  in p9_sbe_occ_probe()
172 	struct occ *occ = platform_get_drvdata(pdev);  in p9_sbe_occ_remove()  local
173 	struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ);  in p9_sbe_occ_remove()
175 	device_remove_bin_file(occ->bus_dev, &bin_attr_ffdc);  in p9_sbe_occ_remove()
177 	ctx->sbe = NULL;  in p9_sbe_occ_remove()
178 	occ_shutdown(occ);  in p9_sbe_occ_remove()
180 	kvfree(ctx->ffdc);  in p9_sbe_occ_remove()
184 	{ .compatible = "ibm,p9-occ-hwmon" },
185 	{ .compatible = "ibm,p10-occ-hwmon" },
192 		.name = "occ-hwmon",
202 MODULE_DESCRIPTION("BMC P9 OCC hwmon driver");