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sgi-xp: create activate and notify gru message queues 

For UV add the code to create the activate and notify gru message queues.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Dean Nelson 2008-11-05 17:28:00 -06:00 committed by H. Peter Anvin
parent 6c1c325de9
commit 2525789b46
2 changed files with 235 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/misc/sgi-xp/xpc.h
View File

@ -180,6 +180,18 @@ struct xpc_vars_part_sn2 {
(XPC_RP_MACH_NASIDS(_rp) + \ (XPC_RP_MACH_NASIDS(_rp) + \
xpc_nasid_mask_nlongs)) xpc_nasid_mask_nlongs))
/*
* Info pertinent to a GRU message queue using a watch list for irq generation.
*/
struct xpc_gru_mq_uv {
void *address; /* address of GRU message queue */
unsigned int order; /* size of GRU message queue as a power of 2 */
int irq; /* irq raised when message is received in mq */
int mmr_blade; /* blade where watchlist was allocated from */
unsigned long mmr_offset; /* offset of irq mmr located on mmr_blade */
int watchlist_num; /* number of watchlist allocatd by BIOS */
};
/* /*
* The activate_mq is used to send/receive GRU messages that affect XPC's * The activate_mq is used to send/receive GRU messages that affect XPC's
* heartbeat, partition active state, and channel state. This is UV only. * heartbeat, partition active state, and channel state. This is UV only.

293
drivers/misc/sgi-xp/xpc_uv.c
View File

@ -18,7 +18,15 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/err.h>
#include <asm/uv/uv_hub.h> #include <asm/uv/uv_hub.h>
#if defined CONFIG_X86_64
#include <asm/uv/bios.h>
#include <asm/uv/uv_irq.h>
#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
#include <asm/sn/intr.h>
#include <asm/sn/sn_sal.h>
#endif
#include "../sgi-gru/gru.h" #include "../sgi-gru/gru.h"
#include "../sgi-gru/grukservices.h" #include "../sgi-gru/grukservices.h"
#include "xpc.h" #include "xpc.h"
@ -27,15 +35,17 @@ static atomic64_t xpc_heartbeat_uv;
static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV); static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
#define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES)
#define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
XPC_ACTIVATE_MSG_SIZE_UV)
#define XPC_ACTIVATE_IRQ_NAME "xpc_activate"
#define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES)
#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
XPC_NOTIFY_MSG_SIZE_UV)
#define XPC_NOTIFY_IRQ_NAME "xpc_notify"
#define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ static struct xpc_gru_mq_uv *xpc_activate_mq_uv;
XPC_ACTIVATE_MSG_SIZE_UV) static struct xpc_gru_mq_uv *xpc_notify_mq_uv;
#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
XPC_NOTIFY_MSG_SIZE_UV)
static void *xpc_activate_mq_uv;
static void *xpc_notify_mq_uv;
static int static int
xpc_setup_partitions_sn_uv(void) xpc_setup_partitions_sn_uv(void)
@ -52,62 +62,209 @@ xpc_setup_partitions_sn_uv(void)
return 0; return 0;
} }
static void * static int
xpc_create_gru_mq_uv(unsigned int mq_size, int cpuid, unsigned int irq, xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
irq_handler_t irq_handler)
{ {
int ret; #if defined CONFIG_X86_64
int nid; mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset);
int mq_order; if (mq->irq < 0) {
struct page *page; dev_err(xpc_part, "uv_setup_irq() returned error=%d\n",
void *mq; mq->irq);
nid = cpu_to_node(cpuid);
mq_order = get_order(mq_size);
page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
mq_order);
if (page == NULL) {
dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
"bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
return NULL;
} }
mq = page_address(page); #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
ret = gru_create_message_queue(mq, mq_size); int mmr_pnode;
if (ret != 0) { unsigned long mmr_value;
dev_err(xpc_part, "gru_create_message_queue() returned "
"error=%d\n", ret);
free_pages((unsigned long)mq, mq_order);
return NULL;
}
/* !!! Need to do some other things to set up IRQ */ if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0)
mq->irq = SGI_XPC_ACTIVATE;
else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0)
mq->irq = SGI_XPC_NOTIFY;
else
return -EINVAL;
ret = request_irq(irq, irq_handler, 0, "xpc", NULL); mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
if (ret != 0) { mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
irq, ret);
free_pages((unsigned long)mq, mq_order);
return NULL;
}
/* !!! enable generation of irq when GRU mq op occurs to this mq */ uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
#else
#error not a supported configuration
#endif
/* ??? allow other partitions to access GRU mq? */ return 0;
return mq;
} }
static void static void
xpc_destroy_gru_mq_uv(void *mq, unsigned int mq_size, unsigned int irq) xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
{ {
/* ??? disallow other partitions to access GRU mq? */ #if defined CONFIG_X86_64
uv_teardown_irq(mq->irq, mq->mmr_blade, mq->mmr_offset);
/* !!! disable generation of irq when GRU mq op occurs to this mq */ #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
int mmr_pnode;
unsigned long mmr_value;
free_irq(irq, NULL); mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
mmr_value = 1UL << 16;
free_pages((unsigned long)mq, get_order(mq_size)); uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
#else
#error not a supported configuration
#endif
}
static int
xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq)
{
int ret;
#if defined CONFIG_X86_64
ret = uv_bios_mq_watchlist_alloc(mq->mmr_blade, mq->address, mq->order,
&mq->mmr_offset);
if (ret < 0) {
dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, "
"ret=%d\n", ret);
return ret;
}
#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
ret = sn_mq_watchlist_alloc(mq->mmr_blade, mq->address, mq->order,
&mq->mmr_offset);
if (ret < 0) {
dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n",
ret);
return -EBUSY;
}
#else
#error not a supported configuration
#endif
mq->watchlist_num = ret;
return 0;
}
static void
xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq)
{
int ret;
#if defined CONFIG_X86_64
ret = uv_bios_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num);
BUG_ON(ret != BIOS_STATUS_SUCCESS);
#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
ret = sn_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num);
BUG_ON(ret != SALRET_OK);
#else
#error not a supported configuration
#endif
}
static struct xpc_gru_mq_uv *
xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name,
irq_handler_t irq_handler)
{
enum xp_retval xp_ret;
int ret;
int nid;
int pg_order;
struct page *page;
struct xpc_gru_mq_uv *mq;
mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL);
if (mq == NULL) {
dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
"a xpc_gru_mq_uv structure\n");
ret = -ENOMEM;
goto out_1;
}
pg_order = get_order(mq_size);
mq->order = pg_order + PAGE_SHIFT;
mq_size = 1UL << mq->order;
mq->mmr_blade = uv_cpu_to_blade_id(cpu);
nid = cpu_to_node(cpu);
page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
pg_order);
if (page == NULL) {
dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
"bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
ret = -ENOMEM;
goto out_2;
}
mq->address = page_address(page);
ret = gru_create_message_queue(mq->address, mq_size);
if (ret != 0) {
dev_err(xpc_part, "gru_create_message_queue() returned "
"error=%d\n", ret);
ret = -EINVAL;
goto out_3;
}
/* enable generation of irq when GRU mq operation occurs to this mq */
ret = xpc_gru_mq_watchlist_alloc_uv(mq);
if (ret != 0)
goto out_3;
ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name);
if (ret != 0)
goto out_4;
ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL);
if (ret != 0) {
dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
mq->irq, ret);
goto out_5;
}
/* allow other partitions to access this GRU mq */
xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size);
if (xp_ret != xpSuccess) {
ret = -EACCES;
goto out_6;
}
return mq;
/* something went wrong */
out_6:
free_irq(mq->irq, NULL);
out_5:
xpc_release_gru_mq_irq_uv(mq);
out_4:
xpc_gru_mq_watchlist_free_uv(mq);
out_3:
free_pages((unsigned long)mq->address, pg_order);
out_2:
kfree(mq);
out_1:
return ERR_PTR(ret);
}
static void
xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq)
{
unsigned int mq_size;
int pg_order;
int ret;
/* disallow other partitions to access GRU mq */
mq_size = 1UL << mq->order;
ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size);
BUG_ON(ret != xpSuccess);
/* unregister irq handler and release mq irq/vector mapping */
free_irq(mq->irq, NULL);
xpc_release_gru_mq_irq_uv(mq);
/* disable generation of irq when GRU mq op occurs to this mq */
xpc_gru_mq_watchlist_free_uv(mq);
pg_order = mq->order - PAGE_SHIFT;
free_pages((unsigned long)mq->address, pg_order);
kfree(mq);
} }
static enum xp_retval static enum xp_retval
@ -402,7 +559,10 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
struct xpc_partition *part; struct xpc_partition *part;
int wakeup_hb_checker = 0; int wakeup_hb_checker = 0;
while ((msg_hdr = gru_get_next_message(xpc_activate_mq_uv)) != NULL) { while (1) {
msg_hdr = gru_get_next_message(xpc_activate_mq_uv->address);
if (msg_hdr == NULL)
break;
partid = msg_hdr->partid; partid = msg_hdr->partid;
if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
@ -418,7 +578,7 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
} }
} }
gru_free_message(xpc_activate_mq_uv, msg_hdr); gru_free_message(xpc_activate_mq_uv->address, msg_hdr);
} }
if (wakeup_hb_checker) if (wakeup_hb_checker)
@ -507,7 +667,7 @@ xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
static int static int
xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp) xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp)
{ {
rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv); rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv->address);
return 0; return 0;
} }
@ -1411,22 +1571,18 @@ xpc_init_uv(void)
return -E2BIG; return -E2BIG;
} }
/* ??? The cpuid argument's value is 0, is that what we want? */ xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0,
/* !!! The irq argument's value isn't correct. */ XPC_ACTIVATE_IRQ_NAME,
xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, 0,
xpc_handle_activate_IRQ_uv); xpc_handle_activate_IRQ_uv);
if (xpc_activate_mq_uv == NULL) if (IS_ERR(xpc_activate_mq_uv))
return -ENOMEM; return PTR_ERR(xpc_activate_mq_uv);
/* ??? The cpuid argument's value is 0, is that what we want? */ xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0,
/* !!! The irq argument's value isn't correct. */ XPC_NOTIFY_IRQ_NAME,
xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, 0,
xpc_handle_notify_IRQ_uv); xpc_handle_notify_IRQ_uv);
if (xpc_notify_mq_uv == NULL) { if (IS_ERR(xpc_notify_mq_uv)) {
/* !!! The irq argument's value isn't correct. */ xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
xpc_destroy_gru_mq_uv(xpc_activate_mq_uv, return PTR_ERR(xpc_notify_mq_uv);
XPC_ACTIVATE_MQ_SIZE_UV, 0);
return -ENOMEM;
} }
return 0; return 0;
@ -1435,9 +1591,6 @@ xpc_init_uv(void)
void void
xpc_exit_uv(void) xpc_exit_uv(void)
{ {
/* !!! The irq argument's value isn't correct. */ xpc_destroy_gru_mq_uv(xpc_notify_mq_uv);
xpc_destroy_gru_mq_uv(xpc_notify_mq_uv, XPC_NOTIFY_MQ_SIZE_UV, 0); xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
/* !!! The irq argument's value isn't correct. */
xpc_destroy_gru_mq_uv(xpc_activate_mq_uv, XPC_ACTIVATE_MQ_SIZE_UV, 0);
} }