Make the remote copy buffer an sn2 only item.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
#define XP_MAX_NPARTITIONS_SN2 64
#define XP_MAX_NPARTITIONS_UV 256
-/*
- * Define the number of u64s required to represent all the C-brick nasids
- * as a bitmap. The cross-partition kernel modules deal only with
- * C-brick nasids, thus the need for bitmaps which don't account for
- * odd-numbered (non C-brick) nasids.
- */
-#define XP_MAX_PHYSNODE_ID (MAX_NUMALINK_NODES / 2)
-#define XP_NASID_MASK_BYTES ((XP_MAX_PHYSNODE_ID + 7) / 8)
-#define XP_NASID_MASK_WORDS ((XP_MAX_PHYSNODE_ID + 63) / 64)
-
/*
* XPC establishes channel connections between the local partition and any
* other partition that is currently up. Over these channels, kernel-level
#define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */
-/*
- * The following pertains to ia64-sn2 only.
- *
- * Memory for XPC's amo variables is allocated by the MSPEC driver. These
- * pages are located in the lowest granule. The lowest granule uses 4k pages
- * for cached references and an alternate TLB handler to never provide a
- * cacheable mapping for the entire region. This will prevent speculative
- * reading of cached copies of our lines from being issued which will cause
- * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
- * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
- * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS) to identify
- * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
- * partitions (i.e., XPCs) consider themselves currently engaged with the
- * local XPC and 1 amo variable to request partition deactivation.
- */
-#define XPC_NOTIFY_IRQ_AMOS 0
-#define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2)
-#define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS)
-#define XPC_DEACTIVATE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1)
-
/*
* The following structure describes the per partition specific variables.
*
#define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2))
#define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE))
-#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words)
-#define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *)(XPC_RP_MACH_NASIDS(_rp) + \
- xp_nasid_mask_words))
+#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xpc_nasid_mask_words)
+#define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *) \
+ (XPC_RP_MACH_NASIDS(_rp) + \
+ xpc_nasid_mask_words))
/*
* Functions registered by add_timer() or called by kernel_thread() only
* the passed argument.
*/
#define XPC_PACK_ARGS(_arg1, _arg2) \
- ((((u64) _arg1) & 0xffffffff) | \
- ((((u64) _arg2) & 0xffffffff) << 32))
+ ((((u64)_arg1) & 0xffffffff) | \
+ ((((u64)_arg2) & 0xffffffff) << 32))
-#define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff)
-#define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff)
+#define XPC_UNPACK_ARG1(_args) (((u64)_args) & 0xffffffff)
+#define XPC_UNPACK_ARG2(_args) ((((u64)_args) >> 32) & 0xffffffff)
/*
* Define a Get/Put value pair (pointers) used with a message queue.
/* found in xpc_partition.c */
extern int xpc_exiting;
-extern int xp_nasid_mask_words;
+extern int xpc_nasid_mask_words;
extern struct xpc_rsvd_page *xpc_rsvd_page;
extern u64 *xpc_mach_nasids;
extern struct xpc_partition *xpc_partitions;
-extern char *xpc_remote_copy_buffer;
-extern void *xpc_remote_copy_buffer_base;
extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void);
extern int xpc_identify_activate_IRQ_sender(void);
unregister_sysctl_table(xpc_sysctl);
kfree(xpc_partitions);
- kfree(xpc_remote_copy_buffer_base);
if (is_shub())
xpc_exit_sn2();
short partid;
struct xpc_partition *part;
struct task_struct *kthread;
- size_t buf_size;
+
+ snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
+ snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
if (is_shub()) {
/*
return -ENODEV;
}
- snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
- snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
-
- buf_size = max(XPC_RP_VARS_SIZE,
- XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
- xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
- GFP_KERNEL,
- &xpc_remote_copy_buffer_base);
- if (xpc_remote_copy_buffer == NULL) {
- dev_err(xpc_part, "can't get memory for remote copy buffer\n");
- ret = -ENOMEM;
- goto out_1;
- }
-
xpc_partitions = kzalloc(sizeof(struct xpc_partition) *
xp_max_npartitions, GFP_KERNEL);
if (xpc_partitions == NULL) {
dev_err(xpc_part, "can't get memory for partition structure\n");
ret = -ENOMEM;
- goto out_2;
+ goto out_1;
}
/*
if (xpc_rsvd_page == NULL) {
dev_err(xpc_part, "can't setup our reserved page\n");
ret = -EBUSY;
- goto out_3;
+ goto out_2;
}
/* add ourselves to the reboot_notifier_list */
if (IS_ERR(kthread)) {
dev_err(xpc_part, "failed while forking hb check thread\n");
ret = -EBUSY;
- goto out_4;
+ goto out_3;
}
/*
return 0;
/* initialization was not successful */
-out_4:
+out_3:
/* indicate to others that our reserved page is uninitialized */
xpc_rsvd_page->stamp = 0;
(void)unregister_die_notifier(&xpc_die_notifier);
(void)unregister_reboot_notifier(&xpc_reboot_notifier);
-out_3:
+out_2:
if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
kfree(xpc_partitions);
-out_2:
- kfree(xpc_remote_copy_buffer_base);
out_1:
if (is_shub())
xpc_exit_sn2();
static u64 *xpc_part_nasids;
u64 *xpc_mach_nasids;
-/* >>> next two variables should be 'xpc_' if they remain here */
-static int xp_sizeof_nasid_mask; /* actual size in bytes of nasid mask */
-int xp_nasid_mask_words; /* actual size in words of nasid mask */
+static int xpc_sizeof_nasid_mask; /* actual size in bytes of nasid mask */
+int xpc_nasid_mask_words; /* actual size in words of nasid mask */
struct xpc_partition *xpc_partitions;
-/*
- * Generic buffer used to store a local copy of portions of a remote
- * partition's reserved page (either its header and part_nasids mask,
- * or its vars).
- */
-char *xpc_remote_copy_buffer;
-void *xpc_remote_copy_buffer_base;
-
/*
* Guarantee that the kmalloc'd memory is cacheline aligned.
*/
/* SAL_version 1 didn't set the nasids_size field */
rp->SAL_nasids_size = 128;
}
- xp_sizeof_nasid_mask = rp->SAL_nasids_size;
- xp_nasid_mask_words = DIV_ROUND_UP(xp_sizeof_nasid_mask,
- BYTES_PER_WORD);
+ xpc_sizeof_nasid_mask = rp->SAL_nasids_size;
+ xpc_nasid_mask_words = DIV_ROUND_UP(xpc_sizeof_nasid_mask,
+ BYTES_PER_WORD);
/* setup the pointers to the various items in the reserved page */
xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
/* pull over the reserved page header and part_nasids mask */
ret = xp_remote_memcpy(remote_rp, (void *)*remote_rp_pa,
- XPC_RP_HEADER_SIZE + xp_sizeof_nasid_mask);
+ XPC_RP_HEADER_SIZE + xpc_sizeof_nasid_mask);
if (ret != xpSuccess)
return ret;
if (discovered_nasids != NULL) {
u64 *remote_part_nasids = XPC_RP_PART_NASIDS(remote_rp);
- for (i = 0; i < xp_nasid_mask_words; i++)
+ for (i = 0; i < xpc_nasid_mask_words; i++)
discovered_nasids[i] |= remote_part_nasids[i];
}
enum xp_retval ret;
remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
- xp_sizeof_nasid_mask,
+ xpc_sizeof_nasid_mask,
GFP_KERNEL, &remote_rp_base);
if (remote_rp == NULL)
return;
- discovered_nasids = kzalloc(sizeof(u64) * xp_nasid_mask_words,
+ discovered_nasids = kzalloc(sizeof(u64) * xpc_nasid_mask_words,
GFP_KERNEL);
if (discovered_nasids == NULL) {
kfree(remote_rp_base);
if (part->remote_rp_pa == 0)
return xpPartitionDown;
- memset(nasid_mask, 0, XP_NASID_MASK_BYTES);
+ memset(nasid_mask, 0, xpc_sizeof_nasid_mask);
part_nasid_pa = (u64)XPC_RP_PART_NASIDS(part->remote_rp_pa);
return xp_remote_memcpy(nasid_mask, (void *)part_nasid_pa,
- xp_sizeof_nasid_mask);
+ xpc_sizeof_nasid_mask);
}
#include <asm/sn/sn_sal.h>
#include "xpc.h"
+/*
+ * Define the number of u64s required to represent all the C-brick nasids
+ * as a bitmap. The cross-partition kernel modules deal only with
+ * C-brick nasids, thus the need for bitmaps which don't account for
+ * odd-numbered (non C-brick) nasids.
+ */
+#define XPC_MAX_PHYSNODES_SN2 (MAX_NUMALINK_NODES / 2)
+#define XP_NASID_MASK_BYTES_SN2 ((XPC_MAX_PHYSNODES_SN2 + 7) / 8)
+#define XP_NASID_MASK_WORDS_SN2 ((XPC_MAX_PHYSNODES_SN2 + 63) / 64)
+
+/*
+ * Memory for XPC's amo variables is allocated by the MSPEC driver. These
+ * pages are located in the lowest granule. The lowest granule uses 4k pages
+ * for cached references and an alternate TLB handler to never provide a
+ * cacheable mapping for the entire region. This will prevent speculative
+ * reading of cached copies of our lines from being issued which will cause
+ * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
+ * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
+ * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS_SN2) to identify
+ * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
+ * partitions (i.e., XPCs) consider themselves currently engaged with the
+ * local XPC and 1 amo variable to request partition deactivation.
+ */
+#define XPC_NOTIFY_IRQ_AMOS_SN2 0
+#define XPC_ACTIVATE_IRQ_AMOS_SN2 (XPC_NOTIFY_IRQ_AMOS_SN2 + \
+ XP_MAX_NPARTITIONS_SN2)
+#define XPC_ENGAGED_PARTITIONS_AMO_SN2 (XPC_ACTIVATE_IRQ_AMOS_SN2 + \
+ XP_NASID_MASK_WORDS_SN2)
+#define XPC_DEACTIVATE_REQUEST_AMO_SN2 (XPC_ENGAGED_PARTITIONS_AMO_SN2 + 1)
+
+/*
+ * Buffer used to store a local copy of portions of a remote partition's
+ * reserved page (either its header and part_nasids mask, or its vars).
+ */
+static char *xpc_remote_copy_buffer_sn2;
+static void *xpc_remote_copy_buffer_base_sn2;
+
static struct xpc_vars_sn2 *xpc_vars; /* >>> Add _sn2 suffix? */
static struct xpc_vars_part_sn2 *xpc_vars_part; /* >>> Add _sn2 suffix? */
int w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid);
struct amo *amos = (struct amo *)__va(amos_page_pa +
- (XPC_ACTIVATE_IRQ_AMOS *
+ (XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
(void)xpc_send_IRQ_sn2(&amos[w_index], (1UL << b_index), to_nasid,
int w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid);
struct amo *amos = (struct amo *)__va(xpc_vars->amos_page_pa +
- (XPC_ACTIVATE_IRQ_AMOS *
+ (XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
/* fake the sending and receipt of an activate IRQ from remote nasid */
{
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
- (XPC_ENGAGED_PARTITIONS_AMO *
+ (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
- (XPC_ENGAGED_PARTITIONS_AMO *
+ (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
static int
xpc_partition_engaged_sn2(short partid)
{
- struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
static int
xpc_any_partition_engaged_sn2(void)
{
- struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* our partition's amo variable */
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
static void
xpc_assume_partition_disengaged_sn2(short partid)
{
- struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* clear bit(s) based on partid mask in our partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
xp_max_npartitions);
/* initialize the activate IRQ related amo variables */
- for (i = 0; i < xp_nasid_mask_words; i++)
- (void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS + i);
+ for (i = 0; i < xpc_nasid_mask_words; i++)
+ (void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS_SN2 + i);
/* initialize the engaged remote partitions related amo variables */
- (void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO);
- (void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO);
+ (void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO_SN2);
+ (void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO_SN2);
return xpSuccess;
}
short partid;
enum xp_retval ret;
- remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer;
+ remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
for (partid = 0; partid < xp_max_npartitions; partid++) {
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
- (XPC_DEACTIVATE_REQUEST_AMO *
+ (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
{
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
- (XPC_DEACTIVATE_REQUEST_AMO *
+ (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
static int
xpc_partition_deactivation_requested_sn2(short partid)
{
- struct amo *amo = xpc_vars->amos_page + XPC_DEACTIVATE_REQUEST_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_DEACTIVATE_REQUEST_AMO_SN2;
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
/* pull over the reserved page structure */
- remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer;
+ remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer_sn2;
ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
if (ret != xpSuccess) {
/* pull over the cross partition variables */
- remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer;
+ remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
ret = xpc_get_remote_vars_sn2(remote_vars_pa, remote_vars);
if (ret != xpSuccess) {
int n_IRQs_detected = 0;
struct amo *act_amos;
- act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
+ act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS_SN2;
/* scan through act amo variable looking for non-zero entries */
- for (word = 0; word < xp_nasid_mask_words; word++) {
+ for (word = 0; word < xpc_nasid_mask_words; word++) {
if (xpc_exiting)
break;
xpc_init_sn2(void)
{
int ret;
+ size_t buf_size;
xpc_rsvd_page_init = xpc_rsvd_page_init_sn2;
xpc_increment_heartbeat = xpc_increment_heartbeat_sn2;
xpc_send_msg = xpc_send_msg_sn2;
xpc_received_msg = xpc_received_msg_sn2;
+ buf_size = max(XPC_RP_VARS_SIZE,
+ XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES_SN2);
+ xpc_remote_copy_buffer_sn2 = xpc_kmalloc_cacheline_aligned(buf_size,
+ GFP_KERNEL,
+ &xpc_remote_copy_buffer_base_sn2);
+ if (xpc_remote_copy_buffer_sn2 == NULL) {
+ dev_err(xpc_part, "can't get memory for remote copy buffer\n");
+ return -ENOMEM;
+ }
+
/* open up protections for IPI and [potentially] amo operations */
xpc_allow_IPI_ops_sn2();
xpc_allow_amo_ops_shub_wars_1_1_sn2();
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
"errno=%d\n", -ret);
xpc_disallow_IPI_ops_sn2();
+ kfree(xpc_remote_copy_buffer_base_sn2);
}
return ret;
}
{
free_irq(SGI_XPC_ACTIVATE, NULL);
xpc_disallow_IPI_ops_sn2();
+ kfree(xpc_remote_copy_buffer_base_sn2);
}
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