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Date: Fri, 2 Aug 2013 17:43:39 -0500
From: Aravind Gopalakrishnan <aravind.gopalakrishnan@....com>
To: Borislav Petkov <bp@...en8.de>
CC: <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
<dougthompson@...ssion.com>, <bhelgaas@...gle.com>,
<jbeulich@...e.com>, <linux-kernel@...r.kernel.org>,
<linux-edac@...r.kernel.org>, <linux-pci@...r.kernel.org>
Subject: Re: [PATCH 1/1] EDAC, AMD64_EDAC: Add ECC decoding support for newer
F15h models.
On 8/2/2013 12:02 PM, Aravind Gopalakrishnan wrote:
> On 8/2/2013 11:25 AM, Borislav Petkov wrote:
>> On Fri, Aug 02, 2013 at 10:33:12AM -0500, Aravind Gopalakrishnan wrote:
>>> Adding support for handling ECC error decoding for new F15 models.
>>> On newer models, support has been included for upto 4 DCT's,
>>> however, only DCT0 and DCT3 are currently configured. (Refer BKDG
>>> Section 2.10)
>>> There is also a new "Routing DRAM Requests" algorithm for this model.
>>>
>>> Tested on Fam15h M30h with ECC turned on using mce_amd_inj facility and
>>> verified to be functionally correct.
>> This patch is huge and before we do any serious reviewing, it needs
>> splitting.
>>
>> So I'm gonna go over it and give you only rough points what needs
>> changing.
>>
>>> Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>
>>>
>>> diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
>>> index 3048ded..3ee7a4d 100644
>>> --- a/arch/x86/kernel/amd_nb.c
>>> +++ b/arch/x86/kernel/amd_nb.c
>>> @@ -20,6 +20,7 @@ const struct pci_device_id amd_nb_misc_ids[] = {
>>> { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
>>> { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F3) },
>>> { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_M10H_F3) },
>>> + { PCI_DEVICE(PCI_VENDOR_ID_AMD,
>>> PCI_DEVICE_ID_AMD_15H_M30H_NB_F3) },
>>> { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_NB_F3) },
>>> {}
>>> };
>>> @@ -27,6 +28,7 @@ EXPORT_SYMBOL(amd_nb_misc_ids);
>>> static const struct pci_device_id amd_nb_link_ids[] = {
>>> { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_15H_NB_F4) },
>>> + { PCI_DEVICE(PCI_VENDOR_ID_AMD,
>>> PCI_DEVICE_ID_AMD_15H_M30H_NB_F4) },
>>> { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_16H_NB_F4) },
>>> {}
>>> };
>>> @@ -81,13 +83,21 @@ int amd_cache_northbridges(void)
>>> next_northbridge(misc, amd_nb_misc_ids);
>>> node_to_amd_nb(i)->link = link =
>>> next_northbridge(link, amd_nb_link_ids);
>>> - }
>>> + }
>>> + /* GART present only on Fam15h upto model 0fh */
>>> if (boot_cpu_data.x86 == 0xf || boot_cpu_data.x86 == 0x10 ||
>>> - boot_cpu_data.x86 == 0x15)
>>> + (boot_cpu_data.x86 == 0x15 && boot_cpu_data.x86_model < 0x10))
>>> amd_northbridges.flags |= AMD_NB_GART;
>>> /*
>>> + * Check CPUID Fn8000_0006_EDX: L3 Cache Identifiers.
>>> + * If == 0, then no need to proceed as there is no L3.
>>> + */
>>> + if (cpuid_edx(0x80000006) == 0)
>>> + return 0;
>> Is this for real? Model 0x30 can have no L3 cache?!
> AFAIK, Yes. But I'll double check this..
>
Checked again, and - there is no L3 cache.
>>> +
>>> + /*
>>> * Some CPU families support L3 Cache Index Disable. There are
>>> some
>>> * limitations because of E382 and E388 on family 0x10.
>>> */
>> Whatever it is, the amd_nb.c stuff needs to be a separate patch.
>>
>>> diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
>>> index 8b6a034..365beda 100644
>>> --- a/drivers/edac/amd64_edac.c
>>> +++ b/drivers/edac/amd64_edac.c
>>> @@ -123,7 +123,11 @@ static void f15h_select_dct(struct amd64_pvt
>>> *pvt, u8 dct)
>>> u32 reg = 0;
>>> amd64_read_pci_cfg(pvt->F1, DCT_CFG_SEL, ®);
>>> - reg &= 0xfffffffe;
>>> + /*
>>> + * If Fam15h M30h, mask out last two bits for programming dct.
>>> + * Else, only mask out the last bit.
>>> + */
>>> + reg &= is_f15h_m30h ? 0xfffffffc : 0xfffffff8;
>>> reg |= dct;
>>> amd64_write_pci_cfg(pvt->F1, DCT_CFG_SEL, reg);
>>> }
>>> @@ -133,8 +137,12 @@ static int f15_read_dct_pci_cfg(struct
>>> amd64_pvt *pvt, int addr, u32 *val,
>>> {
>>> u8 dct = 0;
>>> + /*
>>> + * For F15 M30h, the second dct is DCT 3.
>>> + * Refer BKDG Section 2.10
>>> + */
>>> if (addr >= 0x140 && addr <= 0x1a0) {
>>> - dct = 1;
>>> + dct = is_f15h_m30h ? 3 : 1;
>>> addr -= 0x100;
>>> }
>>> @@ -205,8 +213,9 @@ static int amd64_set_scrub_rate(struct
>>> mem_ctl_info *mci, u32 bw)
>>> if (boot_cpu_data.x86 == 0xf)
>>> min_scrubrate = 0x0;
>>> - /* F15h Erratum #505 */
>>> - if (boot_cpu_data.x86 == 0x15)
>>> + /* F15h Models 0x00 - 0x0f Erratum #505 */
>>> + if (boot_cpu_data.x86 == 0x15 &&
>>> + boot_cpu_data.x86_model != 0x30)
>>> f15h_select_dct(pvt, 0);
>>> return __amd64_set_scrub_rate(pvt->F3, bw, min_scrubrate);
>>> @@ -218,8 +227,9 @@ static int amd64_get_scrub_rate(struct
>>> mem_ctl_info *mci)
>>> u32 scrubval = 0;
>>> int i, retval = -EINVAL;
>>> - /* F15h Erratum #505 */
>>> - if (boot_cpu_data.x86 == 0x15)
>>> + /* F15h Models 0x00 - 0x0f Erratum #505 */
>>> + if (boot_cpu_data.x86 == 0x15 &&
>>> + boot_cpu_data.x86_model != 0x30)
>>> f15h_select_dct(pvt, 0);
>>> amd64_read_pci_cfg(pvt->F3, SCRCTRL, &scrubval);
>>> @@ -343,10 +353,10 @@ static void get_cs_base_and_mask(struct
>>> amd64_pvt *pvt, int csrow, u8 dct,
>>> addr_shift = 4;
>>> /*
>>> - * F16h needs two addr_shift values: 8 for high and 6 for low
>>> - * (cf. F16h BKDG).
>>> + * F16h and F15h(model 30h) needs two addr_shift values:
>>> + * 8 for high and 6 for low (cf. F16h BKDG).
>>> */
>>> - } else if (boot_cpu_data.x86 == 0x16) {
>>> + } else if (boot_cpu_data.x86 == 0x16 || is_f15h_m30h) {
>>> csbase = pvt->csels[dct].csbases[csrow];
>>> csmask = pvt->csels[dct].csmasks[csrow >> 1];
>>> @@ -743,6 +753,9 @@ static void prep_chip_selects(struct amd64_pvt
>>> *pvt)
>>> if (boot_cpu_data.x86 == 0xf && pvt->ext_model < K8_REV_F) {
>>> pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
>>> pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 8;
>>> + } else if (is_f15h_m30h) {
>>> + pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 4;
>>> + pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 2;
>>> } else {
>>> pvt->csels[0].b_cnt = pvt->csels[1].b_cnt = 8;
>>> pvt->csels[0].m_cnt = pvt->csels[1].m_cnt = 4;
>>> @@ -850,9 +863,9 @@ static u64 get_error_address(struct mce *m)
>>> addr = m->addr & GENMASK(start_bit, end_bit);
>>> /*
>>> - * Erratum 637 workaround
>>> + * Erratum 637 workaround for F15h Models 0x00 - 0x0f
>>> */
>>> - if (c->x86 == 0x15) {
>>> + if (c->x86 == 0x15 && boot_cpu_data.x86_model != 0x30) {
>> Huh,
>>
>> c->x86_model is there too, you know.
>
> Oops.. I'll fix this.
>
>>> struct amd64_pvt *pvt;
>>> u64 cc6_base, tmp_addr;
>>> u32 tmp;
>>> @@ -942,7 +955,15 @@ static void read_dram_base_limit_regs(struct
>>> amd64_pvt *pvt, unsigned range)
>>> return;
>>> misc = nb->misc;
>>> - f1 = pci_get_related_function(misc->vendor,
>>> PCI_DEVICE_ID_AMD_15H_NB_F1, misc);
>>> +
>>> + if (c->x86_model == 0x30)
>>> + f1 = pci_get_related_function(misc->vendor,
>>> + PCI_DEVICE_ID_AMD_15H_M30H_NB_F1,
>>> + misc);
>> Indentation.
>>
>>> + else
>>> + f1 = pci_get_related_function(misc->vendor,
>>> + PCI_DEVICE_ID_AMD_15H_NB_F1,
>>> + misc);
>> Simpler:
>>
>> pci_func = (pvt->x86_model == 0x30 ?
>> PCI_DEVICE_ID_AMD_15H_M30H_NB_F1
>> : PCI_DEVICE_ID_AMD_15H_NB_F1);
>>
>> f1 = pci_get_related_function(misc->vendor, pci_func, misc);
>
> Yes, I'll fix this.
>
>>> if (WARN_ON(!f1))
>>> return;
>>> @@ -1173,7 +1194,8 @@ static int f15_dbam_to_chip_select(struct
>>> amd64_pvt *pvt, u8 dct,
>>> }
>>> /*
>>> - * F16h has only limited cs_modes
>>> + * F16h has only limited cs_modes.
>>> + * F15 M30h follows the same pattern.
>>> */
>>> static int f16_dbam_to_chip_select(struct amd64_pvt *pvt, u8 dct,
>>> unsigned cs_mode)
>>> @@ -1218,6 +1240,65 @@ static void read_dram_ctl_register(struct
>>> amd64_pvt *pvt)
>>> }
>>> /*
>>> + * Determine channel (DCT) based on the interleaving mode:
>>> + * F15h M30h BKDG, 2.10.12 Memory Interleaving Modes.
>>> + */
>>> +static u8 f15_m30h_determine_channel(struct amd64_pvt *pvt, u64
>>> sys_addr,
>>> + u8 intlv_en, int num_dcts_intlv, u32 dct_sel)
>>> +{
>>> + u8 channel = 0;
>>> + u8 select;
>>> + u8 intlv_addr = dct_sel_interleave_addr(pvt);
>>> +
>>> + if (!(intlv_en))
>>> + return (u8)(dct_sel);
>>> + /*
>>> + * If num_dcts_intlv == 2, them consider addr bit 8 or addr bit 9
>>> + * depending on intlv_addr, then return either channel = 0/1/2/3.
>>> + * If num_dcts_intlv == 4, consider either bits[8:9] or bits[9:10]
>>> + * depending on intlv_addr, then return the value obtained.
>>> + */
>>> +
>>> + if (num_dcts_intlv == 2) {
>>> + if (intlv_addr == 0x4)
>>> + select = (sys_addr >> 8) & BIT(0);
>>> + else if (intlv_addr == 0x5)
>>> + select = (sys_addr >> 9) & BIT(0);
>>> + else
>>> + return -EINVAL;
>>> +
>>> + /* Upper DCT selected */
>>> + if (select > 0) {
>>> + if (intlv_en & 0x8)
>>> + channel = 0x3;
>>> + else if (intlv_en & 0x4)
>>> + channel = 0x2;
>>> + else
>>> + channel = 0x1;
>> Can intlv_en be a three-bit field with only one bit set? If so, we have
>> these functions like fls() for example which should give you what you
>> want. IOW:
>>
>> if (select)
>> channel = fls(intlv_en);
>>
>>> + } else {
>>> + /* Lower DCT selected */
>>> + if (intlv_en & BIT(0))
>>> + channel = 0;
>>> + else if (intlv_en & 0x2)
>>> + channel = 0x1;
>>> + else
>>> + channel = 0x2;
>> I'm sure you can come up with a similar thing here :)
>
> Okay, thanks for the pointer!
>
Actually, here, since DCT's 1 and 2 are in isolation, channel value is
*always*
either 0 or 3. So this just reduces to -
channel = select ? 0x3 : 0;
>>> + }
>>> + } else if (num_dcts_intlv == 4) {
>>> + if (intlv_addr == 0x4)
>>> + select = (sys_addr >> 8) & 0x3;
>>> + else if (intlv_addr == 0x5)
>>> + select = (sys_addr >> 9) & 0x3;
>>> + else
>>> + return -EINVAL;
>> You know that this function cannot return an error, right? Look at
>> f1x_lookup_addr_in_dct() for example.
>>
>> I can see that you handle this but is there any possibility not to be
>> able to determine the channel?
>
> Some bits are reserved.. Hence the safety of returning error value..
> (In case hardware programs the bits wrongly)
>
>>> +
>>> + channel = select;
>>> + }
>>> +
>>> + return channel;
>>> +}
>>> +
>>> +/*
>>> * Determine channel (DCT) based on the interleaving mode: F10h
>>> BKDG, 2.8.9 Memory
>>> * Interleaving Modes.
>>> */
>>> @@ -1366,6 +1447,10 @@ static int f1x_lookup_addr_in_dct(u64
>>> in_addr, u8 nid, u8 dct)
>>> (in_addr & cs_mask), (cs_base & cs_mask));
>>> if ((in_addr & cs_mask) == (cs_base & cs_mask)) {
>>> + if (is_f15h_m30h) {
>>> + cs_found = csrow;
>>> + break;
>>> + }
>>> cs_found = f10_process_possible_spare(pvt, dct, csrow);
>>> edac_dbg(1, " MATCH csrow=%d\n", cs_found);
>>> @@ -1492,20 +1577,147 @@ static int f1x_match_to_this_node(struct
>>> amd64_pvt *pvt, unsigned range,
>>> return cs_found;
>>> }
>>> -static int f1x_translate_sysaddr_to_cs(struct amd64_pvt *pvt, u64
>>> sys_addr,
>>> - int *chan_sel)
>>> +/*
>>> + * Routing DRAM Requests algorithm is different for F15h M30h.
>>> + * It is cleaner to use a brand new function rather than
>>> + * adding quirks in the more generic 'f1x_match_to_this_node'.
>>> + * Refer "2.10.5 DRAM Routing Requests" in BKDG for info.
>>> + */
>>> +static int f15_m30h_match_to_this_node(struct amd64_pvt *pvt,
>>> unsigned range,
>>> + u64 sys_addr, int *chan_sel)
>>> +{
>>> + int cs_found = -EINVAL;
>>> + int num_dcts_intlv = 0;
>>> + u8 leg_mmio_hole;
>>> + u64 chan_addr, chan_offset, high_addr_offset;
>>> + u64 dct_base, dct_limit;
>>> + u8 channel, alias_channel;
>>> +
>>> + /*
>>> + * Read DRAM Control registers specific to F15 M30h.
>>> + */
>>> + u64 dhar_offset = f10_dhar_offset(pvt);
>>> + u8 dct_offset_en = f15_m30h_dct_offset_en(pvt);
>>> + u8 dct_sel = f15_m30h_dct_sel(pvt);
>>> + u8 intlv_addr = dct_sel_interleave_addr(pvt);
>>> + u8 node_id = dram_dst_node(pvt, range);
>>> + u8 intlv_en = dram_intlv_en(pvt, range);
>>> +
>>> + edac_dbg(1, "(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
>>> + range, sys_addr, get_dram_limit(pvt, range));
>>> +
>>> + if (!(get_dram_base(pvt, range) <= sys_addr) &&
>>> + !(get_dram_limit(pvt, range) >= sys_addr))
>>> + return -EINVAL;
>>> +
>>> + if (dhar_valid(pvt) &&
>>> + dhar_base(pvt) <= sys_addr &&
>>> + sys_addr < BIT_64(32)) {
>>> + amd64_warn("Huh? Address is in the MMIO hole: 0x%016llx\n",
>>> + sys_addr);
>>> + return -EINVAL;
>>> + }
>>> +
>>> + /* Verify sys_addr is within DCT Range. */
>>> + dct_base = (dct_sel_baseaddr(pvt) << 27);
>>> + dct_limit = (f15_m30h_dct_limit_addr(pvt) << 27) | 0x7FFFFFF;
>>> + if (!(f15_m30h_dct_addr_val(pvt)) &&
>>> + !(dct_base <= sys_addr && dct_limit >= sys_addr)) {
>>> + return -EINVAL;
>>> + }
>>> +
>>> + /* Verify number of dct's that participate in channel
>>> interleaving. */
>>> + num_dcts_intlv = (int) hweight8(intlv_en);
>>> +
>>> + if (!(num_dcts_intlv % 2 == 0) || (num_dcts_intlv > 4))
>>> + return -EINVAL;
>>> +
>>> + channel = f15_m30h_determine_channel(pvt, sys_addr,
>>> + intlv_en,
>>> + num_dcts_intlv,
>>> + dct_sel);
>>> +
>>> + /* Verify if we stay within the MAX number of channels allowed */
>>> + if (channel > 4 || channel < 0)
>>> + return -EINVAL;
>>> +
>>> + leg_mmio_hole = f15_m30h_leg_mmio_en(pvt);
>>> +
>>> + /* Get normalized DCT addr */
>>> + if (leg_mmio_hole && (sys_addr >= BIT_64(32)))
>>> + chan_offset = dhar_offset;
>>> + else
>>> + chan_offset = dct_base;
>>> +
>>> + chan_addr = sys_addr - chan_offset;
>>> +
>>> + /* remove channel interleave */
>>> + if (num_dcts_intlv == 2) {
>>> + if (intlv_addr == 0x4)
>>> + chan_addr = ((chan_addr >> 9) << 8) |
>>> + (chan_addr & 0xff);
>>> + else if (intlv_addr == 0x5)
>>> + chan_addr = ((chan_addr >> 10) << 9) |
>>> + (chan_addr & 0x1ff);
>>> + else
>>> + return -EINVAL;
>>> +
>>> + } else if (num_dcts_intlv == 4) {
>>> + if (intlv_addr == 0x4)
>>> + chan_addr = ((chan_addr >> 10) << 8) |
>>> + (chan_addr & 0xff);
>>> + else if (intlv_addr == 0x5)
>>> + chan_addr = ((chan_addr >> 11) << 9) |
>>> + (chan_addr & 0x1ff);
>>> + else
>>> + return -EINVAL;
>>> + }
>>> +
>>> + if (dct_offset_en) {
>>> + high_addr_offset = f15_m30h_dct_high_offset(pvt, channel);
>>> + chan_addr += high_addr_offset;
>>> + }
>>> +
>>> + /* Set DCTCFGSEL = ChannelSelect */
>>> + f15h_select_dct(pvt, channel);
>>> +
>>> + edac_dbg(1, " Normalized DCT addr: 0x%llx\n", chan_addr);
>>> + /* Find the Chip select.. */
>>> + /*
>>> + * NOTE: if channel = 3, then alias it to 1.
>>> + * This is because, in F15 M30h, there is support for
>>> + * 4 DCT's, but only 2 are currently included in the architecture.
>>> + * They are DCT0 and DCT3. But we have read all registers of DCT3
>>> + * into pvt->csels[1]. So we need to use '1' here to get correct
>>> + * info. Refer F15 M30h BKDG Section 2.10 and 2.10.3 for
>>> clarifications
>>> + */
>>> +
>>> + alias_channel = (channel == 3) ? 1 : channel;
>>> +
>>> + cs_found = f1x_lookup_addr_in_dct(chan_addr, node_id,
>>> alias_channel);
>>> +
>>> + if (cs_found >= 0)
>>> + *chan_sel = alias_channel;
>>> +
>>> + return cs_found;
>>> +}
>>> +
>>> +static int
>>> +f1x_translate_sysaddr_to_cs(struct amd64_pvt *pvt,
>>> + u64 sys_addr,
>>> + int *chan_sel)
>>> {
>>> int cs_found = -EINVAL;
>>> unsigned range;
>>> for (range = 0; range < DRAM_RANGES; range++) {
>>> -
>>> if (!dram_rw(pvt, range))
>>> continue;
>>> -
>>> - if ((get_dram_base(pvt, range) <= sys_addr) &&
>>> - (get_dram_limit(pvt, range) >= sys_addr)) {
>>> -
>>> + if (is_f15h_m30h)
>>> + cs_found = f15_m30h_match_to_this_node(pvt, range,
>>> + sys_addr, chan_sel);
>>> + else if ((get_dram_base(pvt, range) <= sys_addr) &&
>>> + (get_dram_limit(pvt, range) >= sys_addr)) {
>>> cs_found = f1x_match_to_this_node(pvt, range,
>>> sys_addr, chan_sel);
>>> if (cs_found >= 0)
>>> @@ -1624,6 +1836,17 @@ static struct amd64_family_type
>>> amd64_family_types[] = {
>>> .read_dct_pci_cfg = f15_read_dct_pci_cfg,
>>> }
>>> },
>>> + [F15_M30H_CPUS] = {
>>> + .ctl_name = "F15h_M30h",
>>> + .f1_id = PCI_DEVICE_ID_AMD_15H_M30H_NB_F1,
>>> + .f3_id = PCI_DEVICE_ID_AMD_15H_M30H_NB_F3,
>>> + .ops = {
>>> + .early_channel_count = f1x_early_channel_count,
>>> + .map_sysaddr_to_csrow = f1x_map_sysaddr_to_csrow,
>>> + .dbam_to_cs = f16_dbam_to_chip_select,
>>> + .read_dct_pci_cfg = f15_read_dct_pci_cfg,
>>> + }
>>> + },
>>> [F16_CPUS] = {
>>> .ctl_name = "F16h",
>>> .f1_id = PCI_DEVICE_ID_AMD_16H_NB_F1,
>>> @@ -2402,6 +2625,12 @@ static struct amd64_family_type
>>> *amd64_per_family_init(struct amd64_pvt *pvt)
>>> break;
>>> case 0x15:
>>> + if (boot_cpu_data.x86_model == 0x30) {
>>> + fam_type = &amd64_family_types[F15_M30H_CPUS];
>>> + pvt->ops = &amd64_family_types[F15_M30H_CPUS].ops;
>>> + break;
>>> + }
>>> +
>>> fam_type = &amd64_family_types[F15_CPUS];
>>> pvt->ops = &amd64_family_types[F15_CPUS].ops;
>>> break;
>>> @@ -2638,6 +2867,14 @@ static
>>> DEFINE_PCI_DEVICE_TABLE(amd64_pci_table) = {
>>> },
>>> {
>>> .vendor = PCI_VENDOR_ID_AMD,
>>> + .device = PCI_DEVICE_ID_AMD_15H_M30H_NB_F2,
>>> + .subvendor = PCI_ANY_ID,
>>> + .subdevice = PCI_ANY_ID,
>>> + .class = 0,
>>> + .class_mask = 0,
>>> + },
>>> + {
>>> + .vendor = PCI_VENDOR_ID_AMD,
>>> .device = PCI_DEVICE_ID_AMD_16H_NB_F2,
>>> .subvendor = PCI_ANY_ID,
>>> .subdevice = PCI_ANY_ID,
>>> diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
>>> index 2c6f113..8ef5ad3 100644
>>> --- a/drivers/edac/amd64_edac.h
>>> +++ b/drivers/edac/amd64_edac.h
>>> @@ -170,6 +170,8 @@
>>> /*
>>> * PCI-defined configuration space registers
>>> */
>>> +#define PCI_DEVICE_ID_AMD_15H_M30H_NB_F1 0x141b
>>> +#define PCI_DEVICE_ID_AMD_15H_M30H_NB_F2 0x141c
>>> #define PCI_DEVICE_ID_AMD_15H_NB_F1 0x1601
>>> #define PCI_DEVICE_ID_AMD_15H_NB_F2 0x1602
>>> #define PCI_DEVICE_ID_AMD_16H_NB_F1 0x1531
>>> @@ -181,13 +183,24 @@
>>> #define DRAM_BASE_LO 0x40
>>> #define DRAM_LIMIT_LO 0x44
>>> -#define dram_intlv_en(pvt, i) ((u8)((pvt->ranges[i].base.lo >> 8)
>>> & 0x7))
>>> +/*
>>> + * F15 M30h DRAM Controller Base/Limit
>>> + * D18F1x2[1C:00]
>>> + */
>>> +#define DRAM_CONT_BASE 0x200
>>> +#define DRAM_CONT_LIMIT 0x204
>>> +
>>> +/*
>>> + * F15 M30h DRAM Controller High Addre Offset
>>> + * D18F1x2[4C:40]
>>> + */
>>> +#define DRAM_CONT_HIGH_OFF 0x240
>>> +
>>> #define dram_rw(pvt, i) ((u8)(pvt->ranges[i].base.lo & 0x3))
>>> #define dram_intlv_sel(pvt, i) ((u8)((pvt->ranges[i].lim.lo >> 8)
>>> & 0x7))
>>> #define dram_dst_node(pvt, i) ((u8)(pvt->ranges[i].lim.lo & 0x7))
>>> #define DHAR 0xf0
>>> -#define dhar_valid(pvt) ((pvt)->dhar & BIT(0))
>>> #define dhar_mem_hoist_valid(pvt) ((pvt)->dhar & BIT(1))
>>> #define dhar_base(pvt) ((pvt)->dhar & 0xff000000)
>>> #define k8_dhar_offset(pvt) (((pvt)->dhar & 0x0000ff00) << 16)
>>> @@ -234,8 +247,6 @@
>>> #define DDR3_MODE BIT(8)
>>> #define DCT_SEL_LO 0x110
>>> -#define dct_sel_baseaddr(pvt) ((pvt)->dct_sel_lo & 0xFFFFF800)
>>> -#define dct_sel_interleave_addr(pvt) (((pvt)->dct_sel_lo >> 6) & 0x3)
>>> #define dct_high_range_enabled(pvt) ((pvt)->dct_sel_lo & BIT(0))
>>> #define dct_interleave_enabled(pvt) ((pvt)->dct_sel_lo & BIT(2))
>>> @@ -293,10 +304,14 @@
>>> /* MSRs */
>>> #define MSR_MCGCTL_NBE BIT(4)
>>> +/* Helper Macro for F15h M30h */
>>> +#define is_f15h_m30h ((boot_cpu_data.x86 == 0x15) && \
>>> + (boot_cpu_data.x86_model == 0x30))
>> This is ugly.
>>
>> Since most functions have struct amd64_pvt as an argument, you could put
>> the family in there in a nice format, which is easy to check. Off the
>> top of my head, you can copy c->x86 and c->x86_model u8s and that should
>> work.
>
> Okay, Will fix this..
>
I have added family and model as part of amd64_pvt structure as you
suggested.
However, I have retained the macro (renamed it to F15H_M30H_CPU) as it
helps to
save an extra line while writing conditions. Do let me know if this is
acceptable...
Sending it out as V2..
>>> enum amd_families {
>>> K8_CPUS = 0,
>>> F10_CPUS,
>>> F15_CPUS,
>>> + F15_M30H_CPUS,
>>> F16_CPUS,
>>> NUM_FAMILIES,
>>> };
>>> @@ -414,6 +429,14 @@ static inline u16 extract_syndrome(u64 status)
>>> return ((status >> 47) & 0xff) | ((status >> 16) & 0xff00);
>>> }
>>> +static inline u8 dct_sel_interleave_addr(struct amd64_pvt *pvt)
>>> +{
>>> + if (is_f15h_m30h)
>>> + return (((pvt->dct_sel_hi >> 9) & 0x1) << 2) |
>>> + ((pvt->dct_sel_lo >> 6) & 0x3);
>>> +
>>> + return ((pvt)->dct_sel_lo >> 6) & 0x3;
>>> +}
>>> /*
>>> * per-node ECC settings descriptor
>>> */
>>> @@ -504,3 +527,80 @@ static inline void enable_caches(void *dummy)
>>> {
>>> write_cr0(read_cr0() & ~X86_CR0_CD);
>>> }
>>> +
>>> +/*
>>> + * Introduce helper functions for F15 M30h
>>> + */
>>> +static inline u8 f15_m30h_dct_offset_en(struct amd64_pvt *pvt)
>>> +{
>>> + u32 tmp;
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
>>> + return (u8) ((tmp >> 3) & BIT(0));
>>> +}
>>> +
>>> +static inline u8 f15_m30h_dct_sel(struct amd64_pvt *pvt)
>>> +{
>>> + u32 tmp;
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
>>> + return (u8) ((tmp >> 4) & 0x7);
>>> +}
>>> +
>>> +static inline u32 f15_m30h_dct_limit_addr(struct amd64_pvt *pvt)
>>> +{
>>> + u32 tmp;
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_LIMIT, &tmp);
>>> + return (tmp >> 11) & 0x1FFF;
>>> +}
>>> +
>>> +static inline u8 f15_m30h_leg_mmio_en(struct amd64_pvt *pvt)
>>> +{
>>> + u32 tmp;
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
>>> + return (u8) ((tmp >> 1) & BIT(0));
>>> +}
>>> +
>>> +static inline u64 f15_m30h_dct_high_offset(struct amd64_pvt *pvt,
>>> u8 channel)
>>> +{
>>> + u32 tmp;
>>> + amd64_read_pci_cfg(pvt->F1,
>>> + DRAM_CONT_HIGH_OFF + (int) channel * 4,
>>> + &tmp);
>>> + return ((tmp >> 11) & 0xfff) << 27;
>>> +}
>>> +
>>> +static inline int f15_m30h_dct_addr_val(struct amd64_pvt *pvt)
>>> +{
>>> + u32 tmp;
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
>>> + return tmp & BIT(0);
>>> +}
>>> +
>>> +static inline u8 dram_intlv_en(struct amd64_pvt *pvt, unsigned int i)
>>> +{
>>> + u32 tmp;
>>> + if (is_f15h_m30h) {
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_LIMIT, &tmp);
>>> + return (u8) tmp & 0xF;
>>> + }
>>> + return (u8) (pvt->ranges[i].base.lo >> 8) & 0x7;
>>> +}
>>> +
>>> +static inline u8 dhar_valid(struct amd64_pvt *pvt)
>>> +{
>>> + u32 tmp;
>>> + if (is_f15h_m30h) {
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
>>> + return (tmp >> 1) & BIT(0);
>>> + }
>>> + return (pvt)->dhar & BIT(0);
>>> +}
>>> +
>>> +static inline u32 dct_sel_baseaddr(struct amd64_pvt *pvt)
>>> +{
>>> + u32 tmp;
>>> + if (is_f15h_m30h) {
>>> + amd64_read_pci_cfg(pvt->F1, DRAM_CONT_BASE, &tmp);
>>> + return (tmp >> 11) & 0x1FFF;
>>> + }
>>> + return (pvt)->dct_sel_lo & 0xFFFFF800;
>>> +}
>> Now this looks like unneeded. Some of those functions are called only
>> once so why do you even have those functions?
>
> Hmm.. You are right.. I will remove these too..
>
>> Whatever it is, the amd64_edac.[ch] stuff needs to be a separate patch.
>>
>> So please split this thing into smaller pieces first.
>>
>> Thanks.
>
> Thanks! I will split it up and make the necessary changes as you
> suggested and send it out as V2.
>
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