linux-kernel - [tip:x86/platform] x86/platform/uv/BAU: Add UV4-specific functions

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Message-ID: <tip-4f059d514f7119a4fdd9934189ff31f2c26b2647@git.kernel.org>
Date:   Thu, 22 Sep 2016 03:33:01 -0700
From:   tip-bot for Andrew Banman <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     travis@....com, tglx@...utronix.de, hpa@...or.com, abanman@....com,
        linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        peterz@...radead.org, sivanich@....com, mingo@...nel.org
Subject: [tip:x86/platform] x86/platform/uv/BAU: Add UV4-specific functions

Commit-ID:  4f059d514f7119a4fdd9934189ff31f2c26b2647
Gitweb:     http://git.kernel.org/tip/4f059d514f7119a4fdd9934189ff31f2c26b2647
Author:     Andrew Banman <abanman@....com>
AuthorDate: Wed, 21 Sep 2016 11:09:21 -0500
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 22 Sep 2016 11:16:15 +0200

x86/platform/uv/BAU: Add UV4-specific functions

Add the UV4-specific function definitions and define an operations struct
to implement them in the BAU driver.

Many BAU MMRs, although functionally the same, have new addresses on UV4
due to hardware changes. Each MMR requires new read/write functions, but
their implementation in the driver does not change. Thus, it is enough to
enumerate them in the operations struct for the changes to take effect.

Signed-off-by: Andrew Banman <abanman@....com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Mike Travis <travis@....com>
Acked-by: Dimitri Sivanich <sivanich@....com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: akpm@...ux-foundation.org
Cc: rja@....com
Link: http://lkml.kernel.org/r/1474474161-265604-11-git-send-email-abanman@sgi.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/asm/uv/uv_bau.h | 30 ++++++++++++++++++++++++++++++
 arch/x86/platform/uv/tlb_uv.c    | 15 ++++++++++++++-
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h
index a7a93a5..57ab86d 100644
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -664,6 +664,16 @@ static inline void write_gmmr_activation(int pnode, unsigned long mmr_image)
 	write_gmmr(pnode, UVH_LB_BAU_SB_ACTIVATION_CONTROL, mmr_image);
 }
 
+static inline void write_mmr_proc_payload_first(int pnode, unsigned long mmr_image)
+{
+	write_gmmr(pnode, UV4H_LB_PROC_INTD_QUEUE_FIRST, mmr_image);
+}
+
+static inline void write_mmr_proc_payload_last(int pnode, unsigned long mmr_image)
+{
+	write_gmmr(pnode, UV4H_LB_PROC_INTD_QUEUE_LAST, mmr_image);
+}
+
 static inline void write_mmr_payload_first(int pnode, unsigned long mmr_image)
 {
 	write_gmmr(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST, mmr_image);
@@ -709,6 +719,26 @@ static inline unsigned long read_gmmr_sw_ack(int pnode)
 	return read_gmmr(pnode, UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
 }
 
+static inline void write_mmr_proc_sw_ack(unsigned long mr)
+{
+	uv_write_local_mmr(UV4H_LB_PROC_INTD_SOFT_ACK_CLEAR, mr);
+}
+
+static inline void write_gmmr_proc_sw_ack(int pnode, unsigned long mr)
+{
+	write_gmmr(pnode, UV4H_LB_PROC_INTD_SOFT_ACK_CLEAR, mr);
+}
+
+static inline unsigned long read_mmr_proc_sw_ack(void)
+{
+	return read_lmmr(UV4H_LB_PROC_INTD_SOFT_ACK_PENDING);
+}
+
+static inline unsigned long read_gmmr_proc_sw_ack(int pnode)
+{
+	return read_gmmr(pnode, UV4H_LB_PROC_INTD_SOFT_ACK_PENDING);
+}
+
 static inline void write_mmr_data_config(int pnode, unsigned long mr)
 {
 	uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG, mr);
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 7ca0e5c..56c5a3a 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -36,6 +36,17 @@ static struct bau_operations uv123_bau_ops = {
 	.write_payload_last      = write_mmr_payload_last,
 };
 
+static struct bau_operations uv4_bau_ops = {
+	.bau_gpa_to_offset       = uv_gpa_to_soc_phys_ram,
+	.read_l_sw_ack           = read_mmr_proc_sw_ack,
+	.read_g_sw_ack           = read_gmmr_proc_sw_ack,
+	.write_l_sw_ack          = write_mmr_proc_sw_ack,
+	.write_g_sw_ack          = write_gmmr_proc_sw_ack,
+	.write_payload_first     = write_mmr_proc_payload_first,
+	.write_payload_last      = write_mmr_proc_payload_last,
+};
+
+
 /* timeouts in nanoseconds (indexed by UVH_AGING_PRESCALE_SEL urgency7 30:28) */
 static int timeout_base_ns[] = {
 		20,
@@ -2158,7 +2169,9 @@ static int __init uv_bau_init(void)
 	if (!is_uv_system())
 		return 0;
 
-	if (is_uv3_hub())
+	if (is_uv4_hub())
+		ops = uv4_bau_ops;
+	else if (is_uv3_hub())
 		ops = uv123_bau_ops;
 	else if (is_uv2_hub())
 		ops = uv123_bau_ops;