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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
H. Peter Anvin
parent
6c1c325de9
commit
2525789b46
@ -180,6 +180,18 @@ struct xpc_vars_part_sn2 {
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(XPC_RP_MACH_NASIDS(_rp) + \
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xpc_nasid_mask_nlongs))
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/*
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* Info pertinent to a GRU message queue using a watch list for irq generation.
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*/
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struct xpc_gru_mq_uv {
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void *address; /* address of GRU message queue */
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unsigned int order; /* size of GRU message queue as a power of 2 */
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int irq; /* irq raised when message is received in mq */
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int mmr_blade; /* blade where watchlist was allocated from */
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unsigned long mmr_offset; /* offset of irq mmr located on mmr_blade */
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int watchlist_num; /* number of watchlist allocatd by BIOS */
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};
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/*
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* The activate_mq is used to send/receive GRU messages that affect XPC's
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* heartbeat, partition active state, and channel state. This is UV only.
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@ -18,7 +18,15 @@
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <asm/uv/uv_hub.h>
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#if defined CONFIG_X86_64
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#include <asm/uv/bios.h>
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#include <asm/uv/uv_irq.h>
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#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
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#include <asm/sn/intr.h>
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#include <asm/sn/sn_sal.h>
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#endif
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#include "../sgi-gru/gru.h"
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#include "../sgi-gru/grukservices.h"
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#include "xpc.h"
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@ -27,15 +35,17 @@ static atomic64_t xpc_heartbeat_uv;
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static DECLARE_BITMAP(xpc_heartbeating_to_mask_uv, XP_MAX_NPARTITIONS_UV);
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#define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES)
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#define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
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XPC_ACTIVATE_MSG_SIZE_UV)
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#define XPC_ACTIVATE_IRQ_NAME "xpc_activate"
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#define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES)
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#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
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XPC_NOTIFY_MSG_SIZE_UV)
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#define XPC_NOTIFY_IRQ_NAME "xpc_notify"
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#define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
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XPC_ACTIVATE_MSG_SIZE_UV)
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#define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \
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XPC_NOTIFY_MSG_SIZE_UV)
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static void *xpc_activate_mq_uv;
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static void *xpc_notify_mq_uv;
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static struct xpc_gru_mq_uv *xpc_activate_mq_uv;
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static struct xpc_gru_mq_uv *xpc_notify_mq_uv;
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static int
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xpc_setup_partitions_sn_uv(void)
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@ -52,62 +62,209 @@ xpc_setup_partitions_sn_uv(void)
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return 0;
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}
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static void *
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xpc_create_gru_mq_uv(unsigned int mq_size, int cpuid, unsigned int irq,
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irq_handler_t irq_handler)
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static int
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xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name)
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{
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int ret;
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int nid;
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int mq_order;
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struct page *page;
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void *mq;
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nid = cpu_to_node(cpuid);
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mq_order = get_order(mq_size);
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page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
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mq_order);
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if (page == NULL) {
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dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
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"bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
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return NULL;
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#if defined CONFIG_X86_64
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mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset);
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if (mq->irq < 0) {
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dev_err(xpc_part, "uv_setup_irq() returned error=%d\n",
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mq->irq);
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}
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mq = page_address(page);
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ret = gru_create_message_queue(mq, mq_size);
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if (ret != 0) {
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dev_err(xpc_part, "gru_create_message_queue() returned "
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"error=%d\n", ret);
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free_pages((unsigned long)mq, mq_order);
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return NULL;
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}
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#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
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int mmr_pnode;
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unsigned long mmr_value;
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/* !!! Need to do some other things to set up IRQ */
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if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0)
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mq->irq = SGI_XPC_ACTIVATE;
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else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0)
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mq->irq = SGI_XPC_NOTIFY;
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else
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return -EINVAL;
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ret = request_irq(irq, irq_handler, 0, "xpc", NULL);
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if (ret != 0) {
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dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
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irq, ret);
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free_pages((unsigned long)mq, mq_order);
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return NULL;
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}
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mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
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mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq;
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/* !!! enable generation of irq when GRU mq op occurs to this mq */
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uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
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#else
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#error not a supported configuration
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#endif
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/* ??? allow other partitions to access GRU mq? */
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return mq;
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return 0;
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}
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static void
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xpc_destroy_gru_mq_uv(void *mq, unsigned int mq_size, unsigned int irq)
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xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq)
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{
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/* ??? disallow other partitions to access GRU mq? */
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#if defined CONFIG_X86_64
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uv_teardown_irq(mq->irq, mq->mmr_blade, mq->mmr_offset);
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/* !!! disable generation of irq when GRU mq op occurs to this mq */
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#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
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int mmr_pnode;
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unsigned long mmr_value;
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free_irq(irq, NULL);
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mmr_pnode = uv_blade_to_pnode(mq->mmr_blade);
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mmr_value = 1UL << 16;
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free_pages((unsigned long)mq, get_order(mq_size));
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uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value);
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#else
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#error not a supported configuration
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#endif
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}
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static int
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xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq)
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{
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int ret;
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#if defined CONFIG_X86_64
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ret = uv_bios_mq_watchlist_alloc(mq->mmr_blade, mq->address, mq->order,
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&mq->mmr_offset);
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if (ret < 0) {
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dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, "
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"ret=%d\n", ret);
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return ret;
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}
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#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
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ret = sn_mq_watchlist_alloc(mq->mmr_blade, mq->address, mq->order,
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&mq->mmr_offset);
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if (ret < 0) {
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dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n",
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ret);
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return -EBUSY;
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}
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#else
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#error not a supported configuration
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#endif
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mq->watchlist_num = ret;
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return 0;
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}
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static void
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xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq)
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{
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int ret;
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#if defined CONFIG_X86_64
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ret = uv_bios_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num);
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BUG_ON(ret != BIOS_STATUS_SUCCESS);
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#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
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ret = sn_mq_watchlist_free(mq->mmr_blade, mq->watchlist_num);
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BUG_ON(ret != SALRET_OK);
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#else
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#error not a supported configuration
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#endif
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}
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static struct xpc_gru_mq_uv *
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xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name,
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irq_handler_t irq_handler)
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{
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enum xp_retval xp_ret;
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int ret;
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int nid;
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int pg_order;
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struct page *page;
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struct xpc_gru_mq_uv *mq;
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mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL);
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if (mq == NULL) {
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dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() "
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"a xpc_gru_mq_uv structure\n");
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ret = -ENOMEM;
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goto out_1;
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}
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pg_order = get_order(mq_size);
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mq->order = pg_order + PAGE_SHIFT;
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mq_size = 1UL << mq->order;
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mq->mmr_blade = uv_cpu_to_blade_id(cpu);
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nid = cpu_to_node(cpu);
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page = alloc_pages_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE,
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pg_order);
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if (page == NULL) {
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dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d "
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"bytes of memory on nid=%d for GRU mq\n", mq_size, nid);
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ret = -ENOMEM;
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goto out_2;
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}
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mq->address = page_address(page);
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ret = gru_create_message_queue(mq->address, mq_size);
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if (ret != 0) {
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dev_err(xpc_part, "gru_create_message_queue() returned "
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"error=%d\n", ret);
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ret = -EINVAL;
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goto out_3;
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}
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/* enable generation of irq when GRU mq operation occurs to this mq */
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ret = xpc_gru_mq_watchlist_alloc_uv(mq);
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if (ret != 0)
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goto out_3;
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ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name);
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if (ret != 0)
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goto out_4;
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ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL);
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if (ret != 0) {
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dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n",
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mq->irq, ret);
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goto out_5;
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}
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/* allow other partitions to access this GRU mq */
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xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size);
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if (xp_ret != xpSuccess) {
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ret = -EACCES;
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goto out_6;
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}
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return mq;
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/* something went wrong */
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out_6:
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free_irq(mq->irq, NULL);
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out_5:
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xpc_release_gru_mq_irq_uv(mq);
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out_4:
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xpc_gru_mq_watchlist_free_uv(mq);
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out_3:
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free_pages((unsigned long)mq->address, pg_order);
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out_2:
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kfree(mq);
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out_1:
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return ERR_PTR(ret);
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}
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static void
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xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq)
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{
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unsigned int mq_size;
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int pg_order;
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int ret;
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/* disallow other partitions to access GRU mq */
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mq_size = 1UL << mq->order;
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ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size);
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BUG_ON(ret != xpSuccess);
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/* unregister irq handler and release mq irq/vector mapping */
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free_irq(mq->irq, NULL);
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xpc_release_gru_mq_irq_uv(mq);
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/* disable generation of irq when GRU mq op occurs to this mq */
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xpc_gru_mq_watchlist_free_uv(mq);
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pg_order = mq->order - PAGE_SHIFT;
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free_pages((unsigned long)mq->address, pg_order);
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kfree(mq);
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}
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static enum xp_retval
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@ -402,7 +559,10 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
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struct xpc_partition *part;
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int wakeup_hb_checker = 0;
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while ((msg_hdr = gru_get_next_message(xpc_activate_mq_uv)) != NULL) {
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while (1) {
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msg_hdr = gru_get_next_message(xpc_activate_mq_uv->address);
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if (msg_hdr == NULL)
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break;
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partid = msg_hdr->partid;
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if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) {
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@ -418,7 +578,7 @@ xpc_handle_activate_IRQ_uv(int irq, void *dev_id)
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}
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}
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gru_free_message(xpc_activate_mq_uv, msg_hdr);
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gru_free_message(xpc_activate_mq_uv->address, msg_hdr);
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}
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if (wakeup_hb_checker)
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@ -507,7 +667,7 @@ xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
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static int
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xpc_setup_rsvd_page_sn_uv(struct xpc_rsvd_page *rp)
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{
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rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv);
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rp->sn.activate_mq_gpa = uv_gpa(xpc_activate_mq_uv->address);
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return 0;
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}
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@ -1411,22 +1571,18 @@ xpc_init_uv(void)
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return -E2BIG;
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}
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/* ??? The cpuid argument's value is 0, is that what we want? */
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/* !!! The irq argument's value isn't correct. */
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xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, 0,
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xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0,
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XPC_ACTIVATE_IRQ_NAME,
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xpc_handle_activate_IRQ_uv);
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if (xpc_activate_mq_uv == NULL)
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return -ENOMEM;
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if (IS_ERR(xpc_activate_mq_uv))
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return PTR_ERR(xpc_activate_mq_uv);
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/* ??? The cpuid argument's value is 0, is that what we want? */
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/* !!! The irq argument's value isn't correct. */
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xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, 0,
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xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0,
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XPC_NOTIFY_IRQ_NAME,
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xpc_handle_notify_IRQ_uv);
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if (xpc_notify_mq_uv == NULL) {
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/* !!! The irq argument's value isn't correct. */
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xpc_destroy_gru_mq_uv(xpc_activate_mq_uv,
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XPC_ACTIVATE_MQ_SIZE_UV, 0);
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return -ENOMEM;
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if (IS_ERR(xpc_notify_mq_uv)) {
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xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
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return PTR_ERR(xpc_notify_mq_uv);
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}
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return 0;
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@ -1435,9 +1591,6 @@ xpc_init_uv(void)
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void
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xpc_exit_uv(void)
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{
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/* !!! The irq argument's value isn't correct. */
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xpc_destroy_gru_mq_uv(xpc_notify_mq_uv, XPC_NOTIFY_MQ_SIZE_UV, 0);
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/* !!! The irq argument's value isn't correct. */
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xpc_destroy_gru_mq_uv(xpc_activate_mq_uv, XPC_ACTIVATE_MQ_SIZE_UV, 0);
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xpc_destroy_gru_mq_uv(xpc_notify_mq_uv);
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xpc_destroy_gru_mq_uv(xpc_activate_mq_uv);
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}
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