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Subject[PATCH 2/4] 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>

---
drivers/misc/sgi-xp/xpc.h | 26 +
drivers/misc/sgi-xp/xpc_uv.c | 532 +++++++++++++++++++++++++++++++--------
2 files changed, 452 insertions(+), 106 deletions(-)
Index: linux/drivers/misc/sgi-xp/xpc_uv.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc_uv.c 2008-10-21 09:30:36.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc_uv.c 2008-10-21 12:15:03.000000000 -0500
@@ -18,7 +18,15 @@
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/device.h>
+#include <linux/err.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/grukservices.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);

#define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES)
-#define XPC_NOTIFY_MSG_SIZE_UV (2 * 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_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
- XPC_ACTIVATE_MSG_SIZE_UV)
-#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
- XPC_NOTIFY_MSG_SIZE_UV)
+#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"

-static void *xpc_activate_mq_uv;
-static void *xpc_notify_mq_uv;
+static struct xpc_gru_mq_uv *xpc_activate_mq_uv;
+static struct xpc_gru_mq_uv *xpc_notify_mq_uv;

static int
xpc_setup_partitions_sn_uv(void)
@@ -52,62 +62,209 @@ xpc_setup_partitions_sn_uv(void)
return 0;
}

-static void *
-xpc_create_gru_mq_uv(unsigned int mq_size, int cpuid, unsigned int irq,
+static int
+xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
+{
+#if defined CONFIG_X86_64
+ mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset);
+ if (mq->irq < 0) {
+ dev_err(xpc_part, "uv_setup_irq() returned error=%d\n",
+ mq->irq);
+ }
+
+#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+ int mmr_pnode;
+ unsigned long mmr_value;
+
+ 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;
+
+ mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
+ mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
+
+ uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
+#else
+ #error not a supported configuration
+#endif
+
+ return 0;
+}
+
+static void
+xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
+{
+#if defined CONFIG_X86_64
+ uv_teardown_irq(mq->irq, mq->mmr_blade, mq->mmr_offset);
+
+#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+ int mmr_pnode;
+ unsigned long mmr_value;
+
+ mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
+ mmr_value = 1UL << 16;
+
+ 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 mq_order;
+ int pg_order;
struct page *page;
- void *mq;
+ 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;

- nid = cpu_to_node(cpuid);
- mq_order = get_order(mq_size);
+ 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,
- mq_order);
+ 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);
- return NULL;
+ ret = -ENOMEM;
+ goto out_2;
}
+ mq->address = page_address(page);

- mq = page_address(page);
- ret = gru_create_message_queue(mq, mq_size);
+ 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);
- free_pages((unsigned long)mq, mq_order);
- return NULL;
+ ret = -EINVAL;
+ goto out_3;
}

- /* !!! Need to do some other things to set up IRQ */
+ /* 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(irq, irq_handler, 0, "xpc", NULL);
+ 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",
- irq, ret);
- free_pages((unsigned long)mq, mq_order);
- return NULL;
+ mq->irq, ret);
+ goto out_5;
}

- /* !!! enable generation of irq when GRU mq op occurs to this mq */
-
- /* ??? allow other partitions to access GRU mq? */
+ /* 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(void *mq, unsigned int mq_size, unsigned int irq)
+xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq)
{
- /* ??? disallow other partitions to access GRU 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 */
+ /* disable generation of irq when GRU mq op occurs to this mq */
+ xpc_gru_mq_watchlist_free_uv(mq);

- free_irq(irq, NULL);
+ pg_order = mq->order - PAGE_SHIFT;
+ free_pages((unsigned long)mq->address, pg_order);

- free_pages((unsigned long)mq, get_order(mq_size));
+ kfree(mq);
}

static enum xp_retval
@@ -402,7 +559,10 @@ xpc_handle_activate_IRQ_uv(int irq, void
struct xpc_partition *part;
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;
if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
@@ -418,7 +578,7 @@ xpc_handle_activate_IRQ_uv(int irq, void
}
}

- gru_free_message(xpc_activate_mq_uv, msg_hdr);
+ gru_free_message(xpc_activate_mq_uv->address, msg_hdr);
}

if (wakeup_hb_checker)
@@ -507,7 +667,7 @@ xpc_get_partition_rsvd_page_pa_uv(void *
static int
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;
}

@@ -1411,22 +1571,18 @@ xpc_init_uv(void)
return -E2BIG;
}

- /* ??? The cpuid argument's value is 0, is that what we want? */
- /* !!! The irq argument's value isn't correct. */
- xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, 0,
+ xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0,
+ XPC_ACTIVATE_IRQ_NAME,
xpc_handle_activate_IRQ_uv);
- if (xpc_activate_mq_uv == NULL)
- return -ENOMEM;
+ if (IS_ERR(xpc_activate_mq_uv))
+ return PTR_ERR(xpc_activate_mq_uv);

- /* ??? The cpuid argument's value is 0, is that what we want? */
- /* !!! The irq argument's value isn't correct. */
- xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, 0,
+ xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0,
+ XPC_NOTIFY_IRQ_NAME,
xpc_handle_notify_IRQ_uv);
- if (xpc_notify_mq_uv == NULL) {
- /* !!! The irq argument's value isn't correct. */
- xpc_destroy_gru_mq_uv(xpc_activate_mq_uv,
- XPC_ACTIVATE_MQ_SIZE_UV, 0);
- return -ENOMEM;
+ if (IS_ERR(xpc_notify_mq_uv)) {
+ xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
+ return PTR_ERR(xpc_notify_mq_uv);
}

return 0;
@@ -1435,9 +1591,6 @@ xpc_init_uv(void)
void
xpc_exit_uv(void)
{
- /* !!! The irq argument's value isn't correct. */
- xpc_destroy_gru_mq_uv(xpc_notify_mq_uv, XPC_NOTIFY_MQ_SIZE_UV, 0);
-
- /* !!! The irq argument's value isn't correct. */
- xpc_destroy_gru_mq_uv(xpc_activate_mq_uv, XPC_ACTIVATE_MQ_SIZE_UV, 0);
+ xpc_destroy_gru_mq_uv(xpc_notify_mq_uv);
+ xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
}
Index: linux/drivers/misc/sgi-xp/xpc.h
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc.h 2008-10-21 09:30:36.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc.h 2008-10-21 11:28:31.000000000 -0500
@@ -181,6 +181,18 @@ struct xpc_vars_part_sn2 {
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
* heartbeat, partition active state, and channel state. This is UV only.
*/

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