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Commit 7d6034d3 authored by Doug Thompson's avatar Doug Thompson Committed by Borislav Petkov
Browse files

amd64_edac: add module registration routines 



Also, link into Kbuild by adding Kconfig and Makefile entries.

Borislav:
- Kconfig/Makefile splitting
- use zero-sized arrays for the sysfs attrs if not enabled
- rename sysfs attrs to more conform values
- shorten CONFIG_ names
- make multiple structure members assignment vertically aligned
- fix/cleanup comments
- fix function return value patterns
- fix err labels
- fix a memleak bug caught by Ingo
- remove the NUMA dependency and use num_k8_northbrides for initializing
  a driver instance per NB.
- do not copy the pvt contents into the mci struct in
  amd64_init_2nd_stage() and save it in the mci->pvt_info void ptr
  instead.
- cleanup debug calls
- simplify amd64_setup_pci_device()

Reviewed-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: default avatarDoug Thompson <dougthompson@xmission.com>
Signed-off-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
parent f9431992

drivers/edac/Kconfig

+26 −0
Original line number Diff line number Diff line
@@ -58,6 +58,32 @@ config EDAC_MM_EDAC 
	  occurred so that a particular failing memory module can be

	  replaced.  If unsure, select 'Y'.



config EDAC_AMD64

	tristate "AMD64 (Opteron, Athlon64) K8, F10h, F11h"

	depends on EDAC_MM_EDAC && X86 && PCI

	default m

	help

	Support for error detection and correction on the AMD 64

	Families of Memory Controllers (K8, F10h and F11h)



config EDAC_AMD64_ERROR_INJECTION

	bool "Sysfs Error Injection facilities"

	depends on EDAC_AMD64

	help

	  Recent Opterons (Family 10h and later) provide for Memory Error

	  Injection into the ECC detection circuits. The amd64_edac module

	  allows the operator/user to inject Uncorrectable and Correctable

	  errors into DRAM.



	  When enabled, in each of the respective memory controller directories

	  (/sys/devices/system/edac/mc/mcX), there are 3 input files:



	  - inject_section (0..3, 16-byte section of 64-byte cacheline),

	  - inject_word (0..8, 16-bit word of 16-byte section),

	  - inject_ecc_vector (hex ecc vector: select bits of inject word)



	  In addition, there are two control files, inject_read and inject_write,

	  which trigger the DRAM ECC Read and Write respectively.



config EDAC_AMD76X

	tristate "AMD 76x (760, 762, 768)"

drivers/edac/Makefile

+7 −0
Original line number Diff line number Diff line
@@ -30,6 +30,13 @@ obj-$(CONFIG_EDAC_I3000) += i3000_edac.o 
obj-$(CONFIG_EDAC_X38)			+= x38_edac.o

obj-$(CONFIG_EDAC_I82860)		+= i82860_edac.o

obj-$(CONFIG_EDAC_R82600)		+= r82600_edac.o



amd64_edac_mod-y :=  amd64_edac_err_types.o amd64_edac.o

amd64_edac_mod-$(CONFIG_EDAC_DEBUG) += amd64_edac_dbg.o

amd64_edac_mod-$(CONFIG_EDAC_AMD64_ERROR_INJECTION) += amd64_edac_inj.o



obj-$(CONFIG_EDAC_AMD64)		+= amd64_edac_mod.o



obj-$(CONFIG_EDAC_PASEMI)		+= pasemi_edac.o

obj-$(CONFIG_EDAC_MPC85XX)		+= mpc85xx_edac.o

obj-$(CONFIG_EDAC_MV64X60)		+= mv64x60_edac.o

drivers/edac/amd64_edac.c

+374 −0
Original line number Diff line number Diff line 
#include "amd64_edac.h"

#include <asm/k8.h>



static struct edac_pci_ctl_info *amd64_ctl_pci;
@@ -2978,3 +2979,376 @@ static int amd64_check_ecc_enabled(struct amd64_pvt *pvt) 
	return ret;

}



struct mcidev_sysfs_attribute sysfs_attrs[ARRAY_SIZE(amd64_dbg_attrs) +

					  ARRAY_SIZE(amd64_inj_attrs) +

					  1];



struct mcidev_sysfs_attribute terminator = { .attr = { .name = NULL } };



static void amd64_set_mc_sysfs_attributes(struct mem_ctl_info *mci)

{

	unsigned int i = 0, j = 0;



	for (; i < ARRAY_SIZE(amd64_dbg_attrs); i++)

		sysfs_attrs[i] = amd64_dbg_attrs[i];



	for (j = 0; j < ARRAY_SIZE(amd64_inj_attrs); j++, i++)

		sysfs_attrs[i] = amd64_inj_attrs[j];



	sysfs_attrs[i] = terminator;



	mci->mc_driver_sysfs_attributes = sysfs_attrs;

}



static void amd64_setup_mci_misc_attributes(struct mem_ctl_info *mci)

{

	struct amd64_pvt *pvt = mci->pvt_info;



	mci->mtype_cap		= MEM_FLAG_DDR2 | MEM_FLAG_RDDR2;

	mci->edac_ctl_cap	= EDAC_FLAG_NONE;

	mci->edac_cap		= EDAC_FLAG_NONE;



	if (pvt->nbcap & K8_NBCAP_SECDED)

		mci->edac_ctl_cap |= EDAC_FLAG_SECDED;



	if (pvt->nbcap & K8_NBCAP_CHIPKILL)

		mci->edac_ctl_cap |= EDAC_FLAG_S4ECD4ED;



	mci->edac_cap		= amd64_determine_edac_cap(pvt);

	mci->mod_name		= EDAC_MOD_STR;

	mci->mod_ver		= EDAC_AMD64_VERSION;

	mci->ctl_name		= get_amd_family_name(pvt->mc_type_index);

	mci->dev_name		= pci_name(pvt->dram_f2_ctl);

	mci->ctl_page_to_phys	= NULL;



	/* IMPORTANT: Set the polling 'check' function in this module */

	mci->edac_check		= amd64_check;



	/* memory scrubber interface */

	mci->set_sdram_scrub_rate = amd64_set_scrub_rate;

	mci->get_sdram_scrub_rate = amd64_get_scrub_rate;

}



/*

 * Init stuff for this DRAM Controller device.

 *

 * Due to a hardware feature on Fam10h CPUs, the Enable Extended Configuration

 * Space feature MUST be enabled on ALL Processors prior to actually reading

 * from the ECS registers. Since the loading of the module can occur on any

 * 'core', and cores don't 'see' all the other processors ECS data when the

 * others are NOT enabled. Our solution is to first enable ECS access in this

 * routine on all processors, gather some data in a amd64_pvt structure and

 * later come back in a finish-setup function to perform that final

 * initialization. See also amd64_init_2nd_stage() for that.

 */

static int amd64_probe_one_instance(struct pci_dev *dram_f2_ctl,

				    int mc_type_index)

{

	struct amd64_pvt *pvt = NULL;

	int err = 0, ret;



	ret = -ENOMEM;

	pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);

	if (!pvt)

		goto err_exit;



	pvt->mc_node_id = get_mc_node_id_from_pdev(dram_f2_ctl);



	pvt->dram_f2_ctl	= dram_f2_ctl;

	pvt->ext_model		= boot_cpu_data.x86_model >> 4;

	pvt->mc_type_index	= mc_type_index;

	pvt->ops		= family_ops(mc_type_index);

	pvt->old_mcgctl		= 0;



	/*

	 * We have the dram_f2_ctl device as an argument, now go reserve its

	 * sibling devices from the PCI system.

	 */

	ret = -ENODEV;

	err = amd64_reserve_mc_sibling_devices(pvt, mc_type_index);

	if (err)

		goto err_free;



	ret = -EINVAL;

	err = amd64_check_ecc_enabled(pvt);

	if (err)

		goto err_put;



	/*

	 * Key operation here: setup of HW prior to performing ops on it. Some

	 * setup is required to access ECS data. After this is performed, the

	 * 'teardown' function must be called upon error and normal exit paths.

	 */

	if (boot_cpu_data.x86 >= 0x10)

		amd64_setup(pvt);



	/*

	 * Save the pointer to the private data for use in 2nd initialization

	 * stage

	 */

	pvt_lookup[pvt->mc_node_id] = pvt;



	return 0;



err_put:

	amd64_free_mc_sibling_devices(pvt);



err_free:

	kfree(pvt);



err_exit:

	return ret;

}



/*

 * This is the finishing stage of the init code. Needs to be performed after all

 * MCs' hardware have been prepped for accessing extended config space.

 */

static int amd64_init_2nd_stage(struct amd64_pvt *pvt)

{

	int node_id = pvt->mc_node_id;

	struct mem_ctl_info *mci;

	int ret, err = 0;



	amd64_read_mc_registers(pvt);



	ret = -ENODEV;

	if (pvt->ops->probe_valid_hardware) {

		err = pvt->ops->probe_valid_hardware(pvt);

		if (err)

			goto err_exit;

	}



	/*

	 * We need to determine how many memory channels there are. Then use

	 * that information for calculating the size of the dynamic instance

	 * tables in the 'mci' structure

	 */

	pvt->channel_count = pvt->ops->early_channel_count(pvt);

	if (pvt->channel_count < 0)

		goto err_exit;



	ret = -ENOMEM;

	mci = edac_mc_alloc(0, CHIPSELECT_COUNT, pvt->channel_count, node_id);

	if (!mci)

		goto err_exit;



	mci->pvt_info = pvt;



	mci->dev = &pvt->dram_f2_ctl->dev;

	amd64_setup_mci_misc_attributes(mci);



	if (amd64_init_csrows(mci))

		mci->edac_cap = EDAC_FLAG_NONE;



	amd64_enable_ecc_error_reporting(mci);

	amd64_set_mc_sysfs_attributes(mci);



	ret = -ENODEV;

	if (edac_mc_add_mc(mci)) {

		debugf1("failed edac_mc_add_mc()\n");

		goto err_add_mc;

	}



	mci_lookup[node_id] = mci;

	pvt_lookup[node_id] = NULL;

	return 0;



err_add_mc:

	edac_mc_free(mci);



err_exit:

	debugf0("failure to init 2nd stage: ret=%d\n", ret);



	amd64_restore_ecc_error_reporting(pvt);



	if (boot_cpu_data.x86 > 0xf)

		amd64_teardown(pvt);



	amd64_free_mc_sibling_devices(pvt);



	kfree(pvt_lookup[pvt->mc_node_id]);

	pvt_lookup[node_id] = NULL;



	return ret;

}





static int __devinit amd64_init_one_instance(struct pci_dev *pdev,

				 const struct pci_device_id *mc_type)

{

	int ret = 0;



	debugf0("(MC node=%d,mc_type='%s')\n",

		get_mc_node_id_from_pdev(pdev),

		get_amd_family_name(mc_type->driver_data));



	ret = pci_enable_device(pdev);

	if (ret < 0)

		ret = -EIO;

	else

		ret = amd64_probe_one_instance(pdev, mc_type->driver_data);



	if (ret < 0)

		debugf0("ret=%d\n", ret);



	return ret;

}



static void __devexit amd64_remove_one_instance(struct pci_dev *pdev)

{

	struct mem_ctl_info *mci;

	struct amd64_pvt *pvt;



	/* Remove from EDAC CORE tracking list */

	mci = edac_mc_del_mc(&pdev->dev);

	if (!mci)

		return;



	pvt = mci->pvt_info;



	amd64_restore_ecc_error_reporting(pvt);



	if (boot_cpu_data.x86 > 0xf)

		amd64_teardown(pvt);



	amd64_free_mc_sibling_devices(pvt);



	kfree(pvt);

	mci->pvt_info = NULL;



	mci_lookup[pvt->mc_node_id] = NULL;



	/* Free the EDAC CORE resources */

	edac_mc_free(mci);

}



/*

 * This table is part of the interface for loading drivers for PCI devices. The

 * PCI core identifies what devices are on a system during boot, and then

 * inquiry this table to see if this driver is for a given device found.

 */

static const struct pci_device_id amd64_pci_table[] __devinitdata = {

	{

		.vendor		= PCI_VENDOR_ID_AMD,

		.device		= PCI_DEVICE_ID_AMD_K8_NB_MEMCTL,

		.subvendor	= PCI_ANY_ID,

		.subdevice	= PCI_ANY_ID,

		.class		= 0,

		.class_mask	= 0,

		.driver_data	= K8_CPUS

	},

	{

		.vendor		= PCI_VENDOR_ID_AMD,

		.device		= PCI_DEVICE_ID_AMD_10H_NB_DRAM,

		.subvendor	= PCI_ANY_ID,

		.subdevice	= PCI_ANY_ID,

		.class		= 0,

		.class_mask	= 0,

		.driver_data	= F10_CPUS

	},

	{

		.vendor		= PCI_VENDOR_ID_AMD,

		.device		= PCI_DEVICE_ID_AMD_11H_NB_DRAM,

		.subvendor	= PCI_ANY_ID,

		.subdevice	= PCI_ANY_ID,

		.class		= 0,

		.class_mask	= 0,

		.driver_data	= F11_CPUS

	},

	{0, }

};

MODULE_DEVICE_TABLE(pci, amd64_pci_table);



static struct pci_driver amd64_pci_driver = {

	.name		= EDAC_MOD_STR,

	.probe		= amd64_init_one_instance,

	.remove		= __devexit_p(amd64_remove_one_instance),

	.id_table	= amd64_pci_table,

};



static void amd64_setup_pci_device(void)

{

	struct mem_ctl_info *mci;

	struct amd64_pvt *pvt;



	if (amd64_ctl_pci)

		return;



	mci = mci_lookup[0];

	if (mci) {



		pvt = mci->pvt_info;

		amd64_ctl_pci =

			edac_pci_create_generic_ctl(&pvt->dram_f2_ctl->dev,

						    EDAC_MOD_STR);



		if (!amd64_ctl_pci) {

			pr_warning("%s(): Unable to create PCI control\n",

				   __func__);



			pr_warning("%s(): PCI error report via EDAC not set\n",

				   __func__);

			}

	}

}



static int __init amd64_edac_init(void)

{

	int nb, err = -ENODEV;



	edac_printk(KERN_INFO, EDAC_MOD_STR, EDAC_AMD64_VERSION "\n");



	opstate_init();



	if (cache_k8_northbridges() < 0)

		goto err_exit;



	err = pci_register_driver(&amd64_pci_driver);

	if (err)

		return err;



	/*

	 * At this point, the array 'pvt_lookup[]' contains pointers to alloc'd

	 * amd64_pvt structs. These will be used in the 2nd stage init function

	 * to finish initialization of the MC instances.

	 */

	for (nb = 0; nb < num_k8_northbridges; nb++) {

		if (!pvt_lookup[nb])

			continue;



		err = amd64_init_2nd_stage(pvt_lookup[nb]);

		if (err)

			goto err_exit;

	}



	amd64_setup_pci_device();



	return 0;



err_exit:

	debugf0("'finish_setup' stage failed\n");

	pci_unregister_driver(&amd64_pci_driver);



	return err;

}



static void __exit amd64_edac_exit(void)

{

	if (amd64_ctl_pci)

		edac_pci_release_generic_ctl(amd64_ctl_pci);



	pci_unregister_driver(&amd64_pci_driver);

}



module_init(amd64_edac_init);

module_exit(amd64_edac_exit);



MODULE_LICENSE("GPL");

MODULE_AUTHOR("SoftwareBitMaker: Doug Thompson, "

		"Dave Peterson, Thayne Harbaugh");

MODULE_DESCRIPTION("MC support for AMD64 memory controllers - "

		EDAC_AMD64_VERSION);



module_param(edac_op_state, int, 0444);

MODULE_PARM_DESC(edac_op_state, "EDAC Error Reporting state: 0=Poll,1=NMI");

drivers/edac/amd64_edac.h

+15 −0
Original line number Diff line number Diff line
@@ -577,6 +577,21 @@ extern const char *ii_msgs[4]; 
extern const char *ext_msgs[32];

extern const char *htlink_msgs[8];



#ifdef CONFIG_EDAC_DEBUG

#define NUM_DBG_ATTRS 9

#else

#define NUM_DBG_ATTRS 0

#endif



#ifdef CONFIG_EDAC_AMD64_ERROR_INJECTION

#define NUM_INJ_ATTRS 5

#else

#define NUM_INJ_ATTRS 0

#endif



extern struct mcidev_sysfs_attribute amd64_dbg_attrs[NUM_DBG_ATTRS],

				     amd64_inj_attrs[NUM_INJ_ATTRS];



/*

 * Each of the PCI Device IDs types have their own set of hardware accessor

 * functions and per device encoding/decoding logic.