From 9a97a7f4d7b26cb61cdbb328b9d8982d94c99170 Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Fri, 27 Jan 2023 17:04:08 +0000 Subject: EDAC/amd64: Rework hw_info_{get,put} The bulk of system-specific information is gathered at init time with hw_info_get(). This function calls a number of helper functions, and many of these helper functions are split between a modern UMC/DF path and a legacy DCT path. Split hw_info_get() into legacy and modern versions. This creates two separate code paths early on, and legacy and modern helper functions can be called directly in the appropriate code path. Also, simplify hw_info_put() and share it between legacy and modern systems. NULL pointer checks are done in pci_dev_put() and kfree(), so they can be called unconditionally. Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20230127170419.1824692-12-yazen.ghannam@amd.com --- drivers/edac/amd64_edac.c | 78 ++++++++++++++++++++--------------------------- 1 file changed, 33 insertions(+), 45 deletions(-) (limited to 'drivers/edac/amd64_edac.c') diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index ac64d27387c8..d2a9793c097e 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -3045,9 +3045,6 @@ log_error: static int reserve_mc_sibling_devs(struct amd64_pvt *pvt, u16 pci_id1, u16 pci_id2) { - if (pvt->umc) - return 0; - /* Reserve the ADDRESS MAP Device */ pvt->F1 = pci_get_related_function(pvt->F3->vendor, pci_id1, pvt->F3); if (!pvt->F1) { @@ -3075,16 +3072,6 @@ reserve_mc_sibling_devs(struct amd64_pvt *pvt, u16 pci_id1, u16 pci_id2) return 0; } -static void free_mc_sibling_devs(struct amd64_pvt *pvt) -{ - if (pvt->umc) { - return; - } else { - pci_dev_put(pvt->F1); - pci_dev_put(pvt->F2); - } -} - static void determine_ecc_sym_sz(struct amd64_pvt *pvt) { pvt->ecc_sym_sz = 4; @@ -3671,13 +3658,45 @@ static void setup_mci_misc_attrs(struct mem_ctl_info *mci) mci->get_sdram_scrub_rate = get_scrub_rate; } +static int dct_hw_info_get(struct amd64_pvt *pvt) +{ + int ret = reserve_mc_sibling_devs(pvt, pvt->f1_id, pvt->f2_id); + + if (ret) + return ret; + + read_mc_regs(pvt); + + return 0; +} + +static int umc_hw_info_get(struct amd64_pvt *pvt) +{ + pvt->umc = kcalloc(pvt->max_mcs, sizeof(struct amd64_umc), GFP_KERNEL); + if (!pvt->umc) + return -ENOMEM; + + read_mc_regs(pvt); + + return 0; +} + +static void hw_info_put(struct amd64_pvt *pvt) +{ + pci_dev_put(pvt->F1); + pci_dev_put(pvt->F2); + kfree(pvt->umc); +} + static struct low_ops umc_ops = { + .hw_info_get = umc_hw_info_get, }; /* Use Family 16h versions for defaults and adjust as needed below. */ static struct low_ops dct_ops = { .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow, .dbam_to_cs = f16_dbam_to_chip_select, + .hw_info_get = dct_hw_info_get, }; static int per_family_init(struct amd64_pvt *pvt) @@ -3820,37 +3839,6 @@ static const struct attribute_group *amd64_edac_attr_groups[] = { NULL }; -static int hw_info_get(struct amd64_pvt *pvt) -{ - u16 pci_id1 = 0, pci_id2 = 0; - int ret; - - if (pvt->fam >= 0x17) { - pvt->umc = kcalloc(pvt->max_mcs, sizeof(struct amd64_umc), GFP_KERNEL); - if (!pvt->umc) - return -ENOMEM; - } else { - pci_id1 = pvt->f1_id; - pci_id2 = pvt->f2_id; - } - - 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->F1) - free_mc_sibling_devs(pvt); - - kfree(pvt->umc); -} - static int init_one_instance(struct amd64_pvt *pvt) { struct mem_ctl_info *mci = NULL; @@ -3924,7 +3912,7 @@ static int probe_one_instance(unsigned int nid) if (ret < 0) goto err_enable; - ret = hw_info_get(pvt); + ret = pvt->ops->hw_info_get(pvt); if (ret < 0) goto err_enable; -- cgit v1.2.3