x86: Add NumaChip support

Adds support for Numascale NumaChip large-SMP systems. It is needed to enable the booting of more than ~168 cores. v2: - [Steffen] enumerate only accessible northbridges - [Daniel] rediffed and validated against 3.1-rc10 v3: - [Daniel] use x86_init core numbering override - [Daniel] cleanups as per feedback v4: - [Daniel] use updated x86_cpuinit override v5: - drop disabling interrupts locally, as ISR write is atomic; drop delay - added read-mostly annotations where appropriate - require CONFIG_SMP, so drop conditional path Workload tested on 96 cores/16 sockets. Signed-off-by: Steffen Persvold <sp@numascale.com> Signed-off-by: Daniel J Blueman <daniel@numascale-asia.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Link: http://lkml.kernel.org/r/1323101246-2400-1-git-send-email-daniel@numascale-asia.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
git-mirror · Dec 5, 2011 · 44b111b · 44b111b
1 parent 64be4c1
commit 44b111b
Show file tree

Hide file tree

Showing 4 changed files with 475 additions and 0 deletions.
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
@@ -343,6 +343,7 @@ config X86_EXTENDED_PLATFORM
 
 	  If you enable this option then you'll be able to select support
 	  for the following (non-PC) 64 bit x86 platforms:
+		Numascale NumaChip
 		ScaleMP vSMP
 		SGI Ultraviolet
 
@@ -351,6 +352,18 @@ config X86_EXTENDED_PLATFORM
 endif
 # This is an alphabetically sorted list of 64 bit extended platforms
 # Please maintain the alphabetic order if and when there are additions
+config X86_NUMACHIP
+	bool "Numascale NumaChip"
+	depends on X86_64
+	depends on X86_EXTENDED_PLATFORM
+	depends on NUMA
+	depends on SMP
+	depends on X86_X2APIC
+	depends on !EDAC_AMD64
+	---help---
+	  Adds support for Numascale NumaChip large-SMP systems. Needed to
+	  enable more than ~168 cores.
+	  If you don't have one of these, you should say N here.
 
 config X86_VSMP
 	bool "ScaleMP vSMP"

diff --git a/arch/x86/include/asm/numachip/numachip_csr.h b/arch/x86/include/asm/numachip/numachip_csr.h
@@ -0,0 +1,167 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Numascale NumaConnect-Specific Header file
+ *
+ * Copyright (C) 2011 Numascale AS. All rights reserved.
+ *
+ * Send feedback to <support@numascale.com>
+ *
+ */
+
+#ifndef _ASM_X86_NUMACHIP_NUMACHIP_CSR_H
+#define _ASM_X86_NUMACHIP_NUMACHIP_CSR_H
+
+#include <linux/numa.h>
+#include <linux/percpu.h>
+#include <linux/io.h>
+#include <linux/swab.h>
+#include <asm/types.h>
+#include <asm/processor.h>
+
+#define CSR_NODE_SHIFT		16
+#define CSR_NODE_BITS(p)	(((unsigned long)(p)) << CSR_NODE_SHIFT)
+#define CSR_NODE_MASK		0x0fff		/* 4K nodes */
+
+/* 32K CSR space, b15 indicates geo/non-geo */
+#define CSR_OFFSET_MASK	0x7fffUL
+
+/* Global CSR space covers all 4K possible nodes with 64K CSR space per node */
+#define NUMACHIP_GCSR_BASE	0x3fff00000000ULL
+#define NUMACHIP_GCSR_LIM	0x3fff0fffffffULL
+#define NUMACHIP_GCSR_SIZE	(NUMACHIP_GCSR_LIM - NUMACHIP_GCSR_BASE + 1)
+
+/*
+ * Local CSR space starts in global CSR space with "nodeid" = 0xfff0, however
+ * when using the direct mapping on x86_64, both start and size needs to be
+ * aligned with PMD_SIZE which is 2M
+ */
+#define NUMACHIP_LCSR_BASE	0x3ffffe000000ULL
+#define NUMACHIP_LCSR_LIM	0x3fffffffffffULL
+#define NUMACHIP_LCSR_SIZE	(NUMACHIP_LCSR_LIM - NUMACHIP_LCSR_BASE + 1)
+
+static inline void *gcsr_address(int node, unsigned long offset)
+{
+	return __va(NUMACHIP_GCSR_BASE | (1UL << 15) |
+		CSR_NODE_BITS(node & CSR_NODE_MASK) | (offset & CSR_OFFSET_MASK));
+}
+
+static inline void *lcsr_address(unsigned long offset)
+{
+	return __va(NUMACHIP_LCSR_BASE | (1UL << 15) |
+		CSR_NODE_BITS(0xfff0) | (offset & CSR_OFFSET_MASK));
+}
+
+static inline unsigned int read_gcsr(int node, unsigned long offset)
+{
+	return swab32(readl(gcsr_address(node, offset)));
+}
+
+static inline void write_gcsr(int node, unsigned long offset, unsigned int val)
+{
+	writel(swab32(val), gcsr_address(node, offset));
+}
+
+static inline unsigned int read_lcsr(unsigned long offset)
+{
+	return swab32(readl(lcsr_address(offset)));
+}
+
+static inline void write_lcsr(unsigned long offset, unsigned int val)
+{
+	writel(swab32(val), lcsr_address(offset));
+}
+
+/* ========================================================================= */
+/*                   CSR_G0_STATE_CLEAR                                      */
+/* ========================================================================= */
+
+#define CSR_G0_STATE_CLEAR (0x000 + (0 << 12))
+union numachip_csr_g0_state_clear {
+	unsigned int v;
+	struct numachip_csr_g0_state_clear_s {
+		unsigned int _state:2;
+		unsigned int _rsvd_2_6:5;
+		unsigned int _lost:1;
+		unsigned int _rsvd_8_31:24;
+	} s;
+};
+
+/* ========================================================================= */
+/*                   CSR_G0_NODE_IDS                                         */
+/* ========================================================================= */
+
+#define CSR_G0_NODE_IDS (0x008 + (0 << 12))
+union numachip_csr_g0_node_ids {
+	unsigned int v;
+	struct numachip_csr_g0_node_ids_s {
+		unsigned int _initialid:16;
+		unsigned int _nodeid:12;
+		unsigned int _rsvd_28_31:4;
+	} s;
+};
+
+/* ========================================================================= */
+/*                   CSR_G3_EXT_IRQ_GEN                                      */
+/* ========================================================================= */
+
+#define CSR_G3_EXT_IRQ_GEN (0x030 + (3 << 12))
+union numachip_csr_g3_ext_irq_gen {
+	unsigned int v;
+	struct numachip_csr_g3_ext_irq_gen_s {
+		unsigned int _vector:8;
+		unsigned int _msgtype:3;
+		unsigned int _index:5;
+		unsigned int _destination_apic_id:16;
+	} s;
+};
+
+/* ========================================================================= */
+/*                   CSR_G3_EXT_IRQ_STATUS                                   */
+/* ========================================================================= */
+
+#define CSR_G3_EXT_IRQ_STATUS (0x034 + (3 << 12))
+union numachip_csr_g3_ext_irq_status {
+	unsigned int v;
+	struct numachip_csr_g3_ext_irq_status_s {
+		unsigned int _result:32;
+	} s;
+};
+
+/* ========================================================================= */
+/*                   CSR_G3_EXT_IRQ_DEST                                     */
+/* ========================================================================= */
+
+#define CSR_G3_EXT_IRQ_DEST (0x038 + (3 << 12))
+union numachip_csr_g3_ext_irq_dest {
+	unsigned int v;
+	struct numachip_csr_g3_ext_irq_dest_s {
+		unsigned int _irq:8;
+		unsigned int _rsvd_8_31:24;
+	} s;
+};
+
+/* ========================================================================= */
+/*                   CSR_G3_NC_ATT_MAP_SELECT                                */
+/* ========================================================================= */
+
+#define CSR_G3_NC_ATT_MAP_SELECT (0x7fc + (3 << 12))
+union numachip_csr_g3_nc_att_map_select {
+	unsigned int v;
+	struct numachip_csr_g3_nc_att_map_select_s {
+		unsigned int _upper_address_bits:4;
+		unsigned int _select_ram:4;
+		unsigned int _rsvd_8_31:24;
+	} s;
+};
+
+/* ========================================================================= */
+/*                   CSR_G3_NC_ATT_MAP_SELECT_0-255                          */
+/* ========================================================================= */
+
+#define CSR_G3_NC_ATT_MAP_SELECT_0 (0x800 + (3 << 12))
+
+#endif /* _ASM_X86_NUMACHIP_NUMACHIP_CSR_H */
+
diff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_SMP)		+= ipi.o
 
 ifeq ($(CONFIG_X86_64),y)
 # APIC probe will depend on the listing order here
+obj-$(CONFIG_X86_NUMACHIP)	+= apic_numachip.o
 obj-$(CONFIG_X86_UV)		+= x2apic_uv_x.o
 obj-$(CONFIG_X86_X2APIC)	+= x2apic_phys.o
 obj-$(CONFIG_X86_X2APIC)	+= x2apic_cluster.o