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-rw-r--r--drivers/misc/sgi-gru/grufile.c3
-rw-r--r--drivers/misc/sgi-gru/grukservices.c150
-rw-r--r--drivers/misc/sgi-gru/grulib.h3
-rw-r--r--drivers/misc/sgi-gru/grutables.h2
4 files changed, 142 insertions, 16 deletions
diff --git a/drivers/misc/sgi-gru/grufile.c b/drivers/misc/sgi-gru/grufile.c
index b1567ce868e9..796ac704795e 100644
--- a/drivers/misc/sgi-gru/grufile.c
+++ b/drivers/misc/sgi-gru/grufile.c
@@ -250,6 +250,9 @@ static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
case GRU_USER_CALL_OS:
err = gru_handle_user_call_os(arg);
break;
+ case GRU_KTEST:
+ err = gru_ktest(arg);
+ break;
case GRU_GET_CONFIG_INFO:
err = gru_get_config_info(arg);
break;
diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c
index 9dff33cb72e3..7d7952b27e03 100644
--- a/drivers/misc/sgi-gru/grukservices.c
+++ b/drivers/misc/sgi-gru/grukservices.c
@@ -846,13 +846,14 @@ EXPORT_SYMBOL_GPL(gru_copy_gpa);
/* ------------------- KERNEL QUICKTESTS RUN AT STARTUP ----------------*/
/* Temp - will delete after we gain confidence in the GRU */
-int quicktest(void)
+static int quicktest0(unsigned long arg)
{
unsigned long word0;
unsigned long word1;
void *cb;
void *dsr;
unsigned long *p;
+ int ret = -EIO;
if (gru_get_cpu_resources(GRU_CACHE_LINE_BYTES, &cb, &dsr))
return MQE_BUG_NO_RESOURCES;
@@ -861,26 +862,148 @@ int quicktest(void)
word1 = 0;
gru_vload(cb, uv_gpa(&word0), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
- if (gru_wait(cb) != CBS_IDLE)
- BUG();
+ if (gru_wait(cb) != CBS_IDLE) {
+ printk(KERN_DEBUG "GRU quicktest0: CBR failure 1\n");
+ goto done;
+ }
- if (*p != MAGIC)
- BUG();
+ if (*p != MAGIC) {
+ printk(KERN_DEBUG "GRU: quicktest0 bad magic 0x%lx\n", *p);
+ goto done;
+ }
gru_vstore(cb, uv_gpa(&word1), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
- if (gru_wait(cb) != CBS_IDLE)
- BUG();
- gru_free_cpu_resources(cb, dsr);
+ if (gru_wait(cb) != CBS_IDLE) {
+ printk(KERN_DEBUG "GRU quicktest0: CBR failure 2\n");
+ goto done;
+ }
if (word0 != word1 || word1 != MAGIC) {
- printk
- ("GRU quicktest err: found 0x%lx, expected 0x%lx\n",
+ printk(KERN_DEBUG
+ "GRU quicktest0 err: found 0x%lx, expected 0x%lx\n",
word1, MAGIC);
- BUG(); /* ZZZ should not be fatal */
+ goto done;
}
+ ret = 0;
- return 0;
+done:
+ gru_free_cpu_resources(cb, dsr);
+ return ret;
}
+#define ALIGNUP(p, q) ((void *)(((unsigned long)(p) + (q) - 1) & ~(q - 1)))
+
+static int quicktest1(unsigned long arg)
+{
+ struct gru_message_queue_desc mqd;
+ void *p, *mq;
+ unsigned long *dw;
+ int i, ret = -EIO;
+ char mes[GRU_CACHE_LINE_BYTES], *m;
+
+ /* Need 1K cacheline aligned that does not cross page boundary */
+ p = kmalloc(4096, 0);
+ mq = ALIGNUP(p, 1024);
+ memset(mes, 0xee, sizeof(mes));
+ dw = mq;
+
+ gru_create_message_queue(&mqd, mq, 8 * GRU_CACHE_LINE_BYTES, 0, 0, 0);
+ for (i = 0; i < 6; i++) {
+ mes[8] = i;
+ do {
+ ret = gru_send_message_gpa(&mqd, mes, sizeof(mes));
+ } while (ret == MQE_CONGESTION);
+ if (ret)
+ break;
+ }
+ if (ret != MQE_QUEUE_FULL || i != 4)
+ goto done;
+
+ for (i = 0; i < 6; i++) {
+ m = gru_get_next_message(&mqd);
+ if (!m || m[8] != i)
+ break;
+ gru_free_message(&mqd, m);
+ }
+ ret = (i == 4) ? 0 : -EIO;
+
+done:
+ kfree(p);
+ return ret;
+}
+
+static int quicktest2(unsigned long arg)
+{
+ static DECLARE_COMPLETION(cmp);
+ unsigned long han;
+ int blade_id = 0;
+ int numcb = 4;
+ int ret = 0;
+ unsigned long *buf;
+ void *cb0, *cb;
+ int i, k, istatus, bytes;
+
+ bytes = numcb * 4 * 8;
+ buf = kmalloc(bytes, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = -EBUSY;
+ han = gru_reserve_async_resources(blade_id, numcb, 0, &cmp);
+ if (!han)
+ goto done;
+
+ gru_lock_async_resource(han, &cb0, NULL);
+ memset(buf, 0xee, bytes);
+ for (i = 0; i < numcb; i++)
+ gru_vset(cb0 + i * GRU_HANDLE_STRIDE, uv_gpa(&buf[i * 4]), 0,
+ XTYPE_DW, 4, 1, IMA_INTERRUPT);
+
+ ret = 0;
+ for (k = 0; k < numcb; k++) {
+ gru_wait_async_cbr(han);
+ for (i = 0; i < numcb; i++) {
+ cb = cb0 + i * GRU_HANDLE_STRIDE;
+ istatus = gru_check_status(cb);
+ if (istatus == CBS_ACTIVE)
+ continue;
+ if (istatus == CBS_EXCEPTION)
+ ret = -EFAULT;
+ else if (buf[i] || buf[i + 1] || buf[i + 2] ||
+ buf[i + 3])
+ ret = -EIO;
+ }
+ }
+ BUG_ON(cmp.done);
+
+ gru_unlock_async_resource(han);
+ gru_release_async_resources(han);
+done:
+ kfree(buf);
+ return ret;
+}
+
+/*
+ * Debugging only. User hook for various kernel tests
+ * of driver & gru.
+ */
+int gru_ktest(unsigned long arg)
+{
+ int ret = -EINVAL;
+
+ switch (arg & 0xff) {
+ case 0:
+ ret = quicktest0(arg);
+ break;
+ case 1:
+ ret = quicktest1(arg);
+ break;
+ case 2:
+ ret = quicktest2(arg);
+ break;
+ }
+ return ret;
+
+}
int gru_kservices_init(struct gru_state *gru)
{
@@ -891,9 +1014,6 @@ int gru_kservices_init(struct gru_state *gru)
return 0;
init_rwsem(&bs->bs_kgts_sema);
-
- if (gru_options & GRU_QUICKLOOK)
- quicktest();
return 0;
}
diff --git a/drivers/misc/sgi-gru/grulib.h b/drivers/misc/sgi-gru/grulib.h
index 6ab872665e7f..87586551d16f 100644
--- a/drivers/misc/sgi-gru/grulib.h
+++ b/drivers/misc/sgi-gru/grulib.h
@@ -56,6 +56,9 @@
/* Get some config options (primarily for tests & emulator) */
#define GRU_GET_CONFIG_INFO _IOWR(GRU_IOCTL_NUM, 51, void *)
+/* Various kernel self-tests */
+#define GRU_KTEST _IOWR(GRU_IOCTL_NUM, 52, void *)
+
#define CONTEXT_WINDOW_BYTES(th) (GRU_GSEG_PAGESIZE * (th))
#define THREAD_POINTER(p, th) (p + GRU_GSEG_PAGESIZE * (th))
diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index ca81800146ff..6dfb3e69411f 100644
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -258,7 +258,6 @@ extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];
#define OPT_DPRINT 1
#define OPT_STATS 2
-#define GRU_QUICKLOOK 4
#define IRQ_GRU 110 /* Starting IRQ number for interrupts */
@@ -662,6 +661,7 @@ extern int gru_fault(struct vm_area_struct *, struct vm_fault *vmf);
extern struct gru_mm_struct *gru_register_mmu_notifier(void);
extern void gru_drop_mmu_notifier(struct gru_mm_struct *gms);
+extern int gru_ktest(unsigned long arg);
extern void gru_flush_tlb_range(struct gru_mm_struct *gms, unsigned long start,
unsigned long len);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.