Commit 9448ec9b authored by Shyam Sundar S K's avatar Shyam Sundar S K Committed by Hans de Goede
Browse files

platform/x86/amd/pmf: Force load driver on older supported platforms 



Some of the older platforms with _HID "AMDI0100" PMF driver can be force
loaded by interested users but only for experimental purposes.

Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarShyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20220802151149.2123699-11-Shyam-sundar.S-k@amd.com


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent 7d77dcc8

drivers/platform/x86/amd/pmf/core.c

+16 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#define AMD_PMF_RESULT_FAILED                0xFF



/* List of supported CPU ids */

#define AMD_CPU_ID_RMB			0x14b5

#define AMD_CPU_ID_PS			0x14e8



#define PMF_MSG_DELAY_MIN_US		50
@@ -52,6 +53,11 @@ static int metrics_table_loop_ms = 1000; 
module_param(metrics_table_loop_ms, int, 0644);

MODULE_PARM_DESC(metrics_table_loop_ms, "Metrics Table sample size time (default = 1000ms)");



/* Force load on supported older platforms */

static bool force_load;

module_param(force_load, bool, 0444);

MODULE_PARM_DESC(force_load, "Force load this driver on supported older platforms (experimental)");



static int current_power_limits_show(struct seq_file *seq, void *unused)

{

	struct amd_pmf_dev *dev = seq->private;
@@ -208,6 +214,7 @@ int amd_pmf_send_cmd(struct amd_pmf_dev *dev, u8 message, bool get, u32 arg, u32 
}



static const struct pci_device_id pmf_pci_ids[] = {

	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_RMB) },

	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_PS) },

	{ }

};
@@ -265,6 +272,7 @@ static void amd_pmf_deinit_features(struct amd_pmf_dev *dev) 
}



static const struct acpi_device_id amd_pmf_acpi_ids[] = {

	{"AMDI0100", 0x100},

	{"AMDI0102", 0},

	{ }

};
@@ -272,6 +280,7 @@ MODULE_DEVICE_TABLE(acpi, amd_pmf_acpi_ids); 


static int amd_pmf_probe(struct platform_device *pdev)

{

	const struct acpi_device_id *id;

	struct amd_pmf_dev *dev;

	struct pci_dev *rdev;

	u32 base_addr_lo;
@@ -280,6 +289,13 @@ static int amd_pmf_probe(struct platform_device *pdev) 
	u32 val;

	int err;



	id = acpi_match_device(amd_pmf_acpi_ids, &pdev->dev);

	if (!id)

		return -ENODEV;



	if (id->driver_data == 0x100 && !force_load)

		return -ENODEV;



	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);

	if (!dev)

		return -ENOMEM;