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EDAC/amd64: Gather hardware information early

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Split out gathering hardware information from init_one_instance()
into a separate function hw_info_get(). This is necessary so that
the information can be cached earlier and used to check if memory is
populated and if ECC is enabled on a node.

Also, define a function hw_info_put() to back out changes made in
hw_info_get().

Check for an allocated PCI device (Function 0 for Family 17h or Function
1 for pre-Family 17h) before freeing, since hw_info_put() may be called
before PCI siblings are reserved.

Drop the family check when freeing pvt->umc. This will be NULL on
pre-Family 17h systems. However, kfree() is safe and will check for a
NULL pointer before freeing.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "linux-edac@vger.kernel.org" <linux-edac@vger.kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Robert Richter <rrichter@marvell.com>
Cc: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20191106012448.243970-3-Yazen.Ghannam@amd.com
This commit is contained in:
Yazen Ghannam 2019-10-22 20:35:10 +00:00 committed by Borislav Petkov
parent 38ddd4d157
commit 80355a3b2d
1 changed files with 51 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

101
drivers/edac/amd64_edac.c
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@ -3418,34 +3418,15 @@ static void compute_num_umcs(void)
edac_dbg(1, "Number of UMCs: %x", num_umcs);
}
static int init_one_instance(unsigned int nid)
static int hw_info_get(struct amd64_pvt *pvt)
{
struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
struct mem_ctl_info *mci = NULL;
struct edac_mc_layer layers[2];
struct amd64_pvt *pvt = NULL;
u16 pci_id1, pci_id2;
int err = 0, ret;
ret = -ENOMEM;
pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);
if (!pvt)
goto err_ret;
pvt->mc_node_id = nid;
pvt->F3 = F3;
ret = -EINVAL;
fam_type = per_family_init(pvt);
if (!fam_type)
goto err_free;
int ret = -EINVAL;
if (pvt->fam >= 0x17) {
pvt->umc = kcalloc(num_umcs, sizeof(struct amd64_umc), GFP_KERNEL);
if (!pvt->umc) {
ret = -ENOMEM;
goto err_free;
}
if (!pvt->umc)
return -ENOMEM;
pci_id1 = fam_type->f0_id;
pci_id2 = fam_type->f6_id;
@ -3454,21 +3435,37 @@ static int init_one_instance(unsigned int nid)
pci_id2 = fam_type->f2_id;
}
err = reserve_mc_sibling_devs(pvt, pci_id1, pci_id2);
if (err)
goto err_post_init;
ret = reserve_mc_sibling_devs(pvt, pci_id1, pci_id2);
if (ret)
return ret;
read_mc_regs(pvt);
return 0;
}
static void hw_info_put(struct amd64_pvt *pvt)
{
if (pvt->F0 || pvt->F1)
free_mc_sibling_devs(pvt);
kfree(pvt->umc);
}
static int init_one_instance(struct amd64_pvt *pvt)
{
struct mem_ctl_info *mci = NULL;
struct edac_mc_layer layers[2];
int ret = -EINVAL;
/*
* 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.
*/
ret = -EINVAL;
pvt->channel_count = pvt->ops->early_channel_count(pvt);
if (pvt->channel_count < 0)
goto err_siblings;
return ret;
ret = -ENOMEM;
layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
@ -3490,9 +3487,9 @@ static int init_one_instance(unsigned int nid)
layers[1].size = 2;
layers[1].is_virt_csrow = false;
mci = edac_mc_alloc(nid, ARRAY_SIZE(layers), layers, 0);
mci = edac_mc_alloc(pvt->mc_node_id, ARRAY_SIZE(layers), layers, 0);
if (!mci)
goto err_siblings;
return ret;
mci->pvt_info = pvt;
mci->pdev = &pvt->F3->dev;
@ -3505,31 +3502,17 @@ static int init_one_instance(unsigned int nid)
ret = -ENODEV;
if (edac_mc_add_mc_with_groups(mci, amd64_edac_attr_groups)) {
edac_dbg(1, "failed edac_mc_add_mc()\n");
goto err_add_mc;
edac_mc_free(mci);
return ret;
}
return 0;
err_add_mc:
edac_mc_free(mci);
err_siblings:
free_mc_sibling_devs(pvt);
err_post_init:
if (pvt->fam >= 0x17)
kfree(pvt->umc);
err_free:
kfree(pvt);
err_ret:
return ret;
}
static int probe_one_instance(unsigned int nid)
{
struct pci_dev *F3 = node_to_amd_nb(nid)->misc;
struct amd64_pvt *pvt = NULL;
struct ecc_settings *s;
int ret;
@ -3540,6 +3523,21 @@ static int probe_one_instance(unsigned int nid)
ecc_stngs[nid] = s;
pvt = kzalloc(sizeof(struct amd64_pvt), GFP_KERNEL);
if (!pvt)
goto err_settings;
pvt->mc_node_id = nid;
pvt->F3 = F3;
fam_type = per_family_init(pvt);
if (!fam_type)
goto err_enable;
ret = hw_info_get(pvt);
if (ret < 0)
goto err_enable;
if (!ecc_enabled(F3, nid)) {
ret = 0;
@ -3556,7 +3554,7 @@ static int probe_one_instance(unsigned int nid)
goto err_enable;
}
ret = init_one_instance(nid);
ret = init_one_instance(pvt);
if (ret < 0) {
amd64_err("Error probing instance: %d\n", nid);
@ -3569,6 +3567,10 @@ static int probe_one_instance(unsigned int nid)
return ret;
err_enable:
hw_info_put(pvt);
kfree(pvt);
err_settings:
kfree(s);
ecc_stngs[nid] = NULL;
@ -3595,14 +3597,13 @@ static void remove_one_instance(unsigned int nid)
restore_ecc_error_reporting(s, nid, F3);
free_mc_sibling_devs(pvt);
kfree(ecc_stngs[nid]);
ecc_stngs[nid] = NULL;
/* Free the EDAC CORE resources */
mci->pvt_info = NULL;
hw_info_put(pvt);
kfree(pvt);
edac_mc_free(mci);
}