From: Borislav Petkov <bp@alien8.de>
To: Yazen Ghannam <yazen.ghannam@amd.com>
Cc: linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org,
mchehab@kernel.org, tony.luck@intel.com,
Smita.KoralahalliChannabasappa@amd.com
Subject: Re: [PATCH v2 04/31] EDAC/amd64: Allow for DF Indirect Broadcast reads
Date: Wed, 30 Jun 2021 18:22:54 +0200 [thread overview]
Message-ID: <YNyaXr9yfi/paLt/@zn.tnic> (raw)
In-Reply-To: <20210623192002.3671647-5-yazen.ghannam@amd.com>
On Wed, Jun 23, 2021 at 07:19:35PM +0000, Yazen Ghannam wrote:
> The DF Indirect Access method allows for "Broadcast" accesses in which
> case no specific instance is targeted. Add support using a reserved
> instance ID of 0xFF to indicate a broadcast access. Set the FICAA
> register appropriately.
>
> Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
> ---
> Link:
> https://lkml.kernel.org/r/20210507190140.18854-1-Yazen.Ghannam@amd.com
>
> v1->v2:
> * New in v2.
>
> drivers/edac/amd64_edac.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
> index b94067e3952b..d67cd8f57b94 100644
> --- a/drivers/edac/amd64_edac.c
> +++ b/drivers/edac/amd64_edac.c
> @@ -1010,7 +1010,11 @@ struct df_reg {
> *
> * Fabric Indirect Configuration Access Data (FICAD): There are FICAD LO
> * and FICAD HI registers but so far we only need the LO register.
> + *
> + * Use Instance Id 0xFF to indicate a broadcast read.
> */
> +
> +#define DF_BROADCAST 0xFF
> static int amd_df_indirect_read(u16 node, struct df_reg reg, u8 instance_id, u32 *lo)
> {
> struct pci_dev *F4;
> @@ -1024,7 +1028,7 @@ static int amd_df_indirect_read(u16 node, struct df_reg reg, u8 instance_id, u32
> if (!F4)
> goto out;
>
> - ficaa = 1;
> + ficaa = (instance_id == DF_BROADCAST) ? 0 : 1;
Or, you can define two functions:
df_indirect_read_broadcast()
df_indirect_read_umc()
(no need for the "amd_" prefix either - this is a static function now)
which both call a low-level helper:
static int __df_indirect_read(u16 node, struct df_reg reg, u8 instance_id, u32 *lo)
and there you either pass the instance_id or 0xff depending on which
outer function is calling it...
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-06-30 16:23 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-23 19:19 [PATCH v2 00/31] AMD MCA Address Translation Updates Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 01/31] x86/MCE/AMD, EDAC/amd64: Move address translation to AMD64 EDAC Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 02/31] x86/amd_nb, EDAC/amd64: Move DF Indirect Read " Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 03/31] EDAC/amd64: Don't use naked values for DF registers Yazen Ghannam
2021-06-25 15:21 ` Borislav Petkov
2021-07-08 19:35 ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 04/31] EDAC/amd64: Allow for DF Indirect Broadcast reads Yazen Ghannam
2021-06-30 16:22 ` Borislav Petkov [this message]
2021-07-08 19:44 ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 05/31] EDAC/amd64: Add context struct Yazen Ghannam
2021-06-30 17:17 ` Borislav Petkov
2021-07-08 19:53 ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 06/31] EDAC/amd64: Define Data Fabric operations Yazen Ghannam
2021-06-30 17:19 ` Borislav Petkov
2021-07-08 19:55 ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 07/31] EDAC/amd64: Define functions for DramOffset Yazen Ghannam
2021-06-30 17:27 ` Borislav Petkov
2021-07-08 20:08 ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 08/31] EDAC/amd64: Define function to read DRAM address map registers Yazen Ghannam
2021-06-30 17:29 ` Borislav Petkov
2021-06-23 19:19 ` [PATCH v2 09/31] EDAC/amd64: Define function to find interleaving mode Yazen Ghannam
2021-06-30 17:33 ` Borislav Petkov
2021-07-08 20:09 ` Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 10/31] EDAC/amd64: Define function to denormalize address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 11/31] EDAC/amd64: Define function to add DRAM base and hole Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 12/31] EDAC/amd64: Define function to dehash address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 13/31] EDAC/amd64: Define function to check DRAM limit address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 14/31] EDAC/amd64: Remove goto statements Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 15/31] EDAC/amd64: Simplify function parameters Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 16/31] EDAC/amd64: Define function to get Interleave Address Bit Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 17/31] EDAC/amd64: Skip denormalization if no interleaving Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 18/31] EDAC/amd64: Define function to get number of interleaved channels Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 19/31] EDAC/amd64: Define function to get number of interleaved dies Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 20/31] EDAC/amd64: Define function to get number of interleaved sockets Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 21/31] EDAC/amd64: Remove unnecessary assert Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 22/31] EDAC/amd64: Define function to make space for CS ID Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 23/31] EDAC/amd64: Define function to calculate " Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 24/31] EDAC/amd64: Define function to insert CS ID into address Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 25/31] EDAC/amd64: Define function to get CS Fabric ID Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 26/31] EDAC/amd64: Define function to find shift and mask values Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 27/31] EDAC/amd64: Update CS ID calculation to match reference code Yazen Ghannam
2021-06-23 19:19 ` [PATCH v2 28/31] EDAC/amd64: Match hash function to " Yazen Ghannam
2021-06-23 19:20 ` [PATCH v2 29/31] EDAC/amd64: Define helper function to get interleave address select bit Yazen Ghannam
2021-06-23 19:20 ` [PATCH v2 30/31] EDAC/amd64: Add support for address translation on DF3 systems Yazen Ghannam
2021-06-23 19:20 ` [PATCH v2 31/31] EDAC/amd64: Add glossary of acronyms for address translation Yazen Ghannam
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