#include <linux/device.h>
#include <linux/io.h>
#include <linux/uaccess.h>
+#include <linux/security.h>
#include <asm/pgtable.h>
#include "gru.h"
#include "grutables.h"
#include "gru_instructions.h"
#include <asm/uv/uv_hub.h>
+/* Return codes for vtop functions */
+#define VTOP_SUCCESS 0
+#define VTOP_INVALID -1
+#define VTOP_RETRY -2
+
+
/*
* Test if a physical address is a valid GRU GSEG address
*/
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
- struct gru_thread_state *gts = NULL;
+ struct gru_thread_state *gts = ERR_PTR(-EINVAL);
down_write(&mm->mmap_sem);
vma = gru_find_vma(vaddr);
- if (vma)
- gts = gru_alloc_thread_state(vma, TSID(vaddr, vma));
- if (gts) {
- mutex_lock(>s->ts_ctxlock);
- downgrade_write(&mm->mmap_sem);
- } else {
- up_write(&mm->mmap_sem);
- }
+ if (!vma)
+ goto err;
+ gts = gru_alloc_thread_state(vma, TSID(vaddr, vma));
+ if (IS_ERR(gts))
+ goto err;
+ mutex_lock(>s->ts_ctxlock);
+ downgrade_write(&mm->mmap_sem);
+ return gts;
+
+err:
+ up_write(&mm->mmap_sem);
return gts;
}
* is necessary to prevent the user from seeing a stale cb.istatus that will
* change as soon as the TFH restart is complete. Races may cause an
* occasional failure to clear the cb.istatus, but that is ok.
- *
- * If the cb address is not valid (should not happen, but...), nothing
- * bad will happen.. The get_user()/put_user() will fail but there
- * are no bad side-effects.
*/
-static void gru_cb_set_istatus_active(unsigned long __user *cb)
+static void gru_cb_set_istatus_active(struct gru_instruction_bits *cbk)
{
- union {
- struct gru_instruction_bits bits;
- unsigned long dw;
- } u;
-
- if (cb) {
- get_user(u.dw, cb);
- u.bits.istatus = CBS_ACTIVE;
- put_user(u.dw, cb);
+ if (cbk) {
+ cbk->istatus = CBS_ACTIVE;
}
}
-/*
- * Convert a interrupt IRQ to a pointer to the GRU GTS that caused the
- * interrupt. Interrupts are always sent to a cpu on the blade that contains the
- * GRU (except for headless blades which are not currently supported). A blade
- * has N grus; a block of N consecutive IRQs is assigned to the GRUs. The IRQ
- * number uniquely identifies the GRU chiplet on the local blade that caused the
- * interrupt. Always called in interrupt context.
- */
-static inline struct gru_state *irq_to_gru(int irq)
-{
- return &gru_base[uv_numa_blade_id()]->bs_grus[irq - IRQ_GRU];
-}
-
/*
* Read & clear a TFM
*
* the GRU, atomic operations must be used to clear bits.
*/
static void get_clear_fault_map(struct gru_state *gru,
- struct gru_tlb_fault_map *map)
+ struct gru_tlb_fault_map *imap,
+ struct gru_tlb_fault_map *dmap)
{
unsigned long i, k;
struct gru_tlb_fault_map *tfm;
k = tfm->fault_bits[i];
if (k)
k = xchg(&tfm->fault_bits[i], 0UL);
- map->fault_bits[i] = k;
+ imap->fault_bits[i] = k;
+ k = tfm->done_bits[i];
+ if (k)
+ k = xchg(&tfm->done_bits[i], 0UL);
+ dmap->fault_bits[i] = k;
}
/*
return 0;
err:
- local_irq_enable();
return 1;
}
+static int gru_vtop(struct gru_thread_state *gts, unsigned long vaddr,
+ int write, int atomic, unsigned long *gpa, int *pageshift)
+{
+ struct mm_struct *mm = gts->ts_mm;
+ struct vm_area_struct *vma;
+ unsigned long paddr;
+ int ret, ps;
+
+ vma = find_vma(mm, vaddr);
+ if (!vma)
+ goto inval;
+
+ /*
+ * Atomic lookup is faster & usually works even if called in non-atomic
+ * context.
+ */
+ rmb(); /* Must/check ms_range_active before loading PTEs */
+ ret = atomic_pte_lookup(vma, vaddr, write, &paddr, &ps);
+ if (ret) {
+ if (atomic)
+ goto upm;
+ if (non_atomic_pte_lookup(vma, vaddr, write, &paddr, &ps))
+ goto inval;
+ }
+ if (is_gru_paddr(paddr))
+ goto inval;
+ paddr = paddr & ~((1UL << ps) - 1);
+ *gpa = uv_soc_phys_ram_to_gpa(paddr);
+ *pageshift = ps;
+ return VTOP_SUCCESS;
+
+inval:
+ return VTOP_INVALID;
+upm:
+ return VTOP_RETRY;
+}
+
+
+/*
+ * Flush a CBE from cache. The CBE is clean in the cache. Dirty the
+ * CBE cacheline so that the line will be written back to home agent.
+ * Otherwise the line may be silently dropped. This has no impact
+ * except on performance.
+ */
+static void gru_flush_cache_cbe(struct gru_control_block_extended *cbe)
+{
+ if (unlikely(cbe)) {
+ cbe->cbrexecstatus = 0; /* make CL dirty */
+ gru_flush_cache(cbe);
+ }
+}
+
+/*
+ * Preload the TLB with entries that may be required. Currently, preloading
+ * is implemented only for BCOPY. Preload <tlb_preload_count> pages OR to
+ * the end of the bcopy tranfer, whichever is smaller.
+ */
+static void gru_preload_tlb(struct gru_state *gru,
+ struct gru_thread_state *gts, int atomic,
+ unsigned long fault_vaddr, int asid, int write,
+ unsigned char tlb_preload_count,
+ struct gru_tlb_fault_handle *tfh,
+ struct gru_control_block_extended *cbe)
+{
+ unsigned long vaddr = 0, gpa;
+ int ret, pageshift;
+
+ if (cbe->opccpy != OP_BCOPY)
+ return;
+
+ if (fault_vaddr == cbe->cbe_baddr0)
+ vaddr = fault_vaddr + GRU_CACHE_LINE_BYTES * cbe->cbe_src_cl - 1;
+ else if (fault_vaddr == cbe->cbe_baddr1)
+ vaddr = fault_vaddr + (1 << cbe->xtypecpy) * cbe->cbe_nelemcur - 1;
+
+ fault_vaddr &= PAGE_MASK;
+ vaddr &= PAGE_MASK;
+ vaddr = min(vaddr, fault_vaddr + tlb_preload_count * PAGE_SIZE);
+
+ while (vaddr > fault_vaddr) {
+ ret = gru_vtop(gts, vaddr, write, atomic, &gpa, &pageshift);
+ if (ret || tfh_write_only(tfh, gpa, GAA_RAM, vaddr, asid, write,
+ GRU_PAGESIZE(pageshift)))
+ return;
+ gru_dbg(grudev,
+ "%s: gid %d, gts 0x%p, tfh 0x%p, vaddr 0x%lx, asid 0x%x, rw %d, ps %d, gpa 0x%lx\n",
+ atomic ? "atomic" : "non-atomic", gru->gs_gid, gts, tfh,
+ vaddr, asid, write, pageshift, gpa);
+ vaddr -= PAGE_SIZE;
+ STAT(tlb_preload_page);
+ }
+}
+
/*
* Drop a TLB entry into the GRU. The fault is described by info in an TFH.
* Input:
*/
static int gru_try_dropin(struct gru_thread_state *gts,
struct gru_tlb_fault_handle *tfh,
- unsigned long __user *cb)
+ struct gru_instruction_bits *cbk)
{
- struct mm_struct *mm = gts->ts_mm;
- struct vm_area_struct *vma;
- int pageshift, asid, write, ret;
- unsigned long paddr, gpa, vaddr;
+ struct gru_control_block_extended *cbe = NULL;
+ unsigned char tlb_preload_count = gts->ts_tlb_preload_count;
+ int pageshift = 0, asid, write, ret, atomic = !cbk, indexway;
+ unsigned long gpa = 0, vaddr = 0;
/*
* NOTE: The GRU contains magic hardware that eliminates races between
* the dropin is ignored. This eliminates the need for additional locks.
*/
+ /*
+ * Prefetch the CBE if doing TLB preloading
+ */
+ if (unlikely(tlb_preload_count)) {
+ cbe = gru_tfh_to_cbe(tfh);
+ prefetchw(cbe);
+ }
+
/*
* Error if TFH state is IDLE or FMM mode & the user issuing a UPM call.
* Might be a hardware race OR a stupid user. Ignore FMM because FMM
* is a transient state.
*/
+ if (tfh->status != TFHSTATUS_EXCEPTION) {
+ gru_flush_cache(tfh);
+ sync_core();
+ if (tfh->status != TFHSTATUS_EXCEPTION)
+ goto failnoexception;
+ STAT(tfh_stale_on_fault);
+ }
if (tfh->state == TFHSTATE_IDLE)
goto failidle;
- if (tfh->state == TFHSTATE_MISS_FMM && cb)
+ if (tfh->state == TFHSTATE_MISS_FMM && cbk)
goto failfmm;
write = (tfh->cause & TFHCAUSE_TLB_MOD) != 0;
vaddr = tfh->missvaddr;
asid = tfh->missasid;
+ indexway = tfh->indexway;
if (asid == 0)
goto failnoasid;
if (atomic_read(>s->ts_gms->ms_range_active))
goto failactive;
- vma = find_vma(mm, vaddr);
- if (!vma)
+ ret = gru_vtop(gts, vaddr, write, atomic, &gpa, &pageshift);
+ if (ret == VTOP_INVALID)
goto failinval;
+ if (ret == VTOP_RETRY)
+ goto failupm;
- /*
- * Atomic lookup is faster & usually works even if called in non-atomic
- * context.
- */
- rmb(); /* Must/check ms_range_active before loading PTEs */
- ret = atomic_pte_lookup(vma, vaddr, write, &paddr, &pageshift);
- if (ret) {
- if (!cb)
+ if (!(gts->ts_sizeavail & GRU_SIZEAVAIL(pageshift))) {
+ gts->ts_sizeavail |= GRU_SIZEAVAIL(pageshift);
+ if (atomic || !gru_update_cch(gts)) {
+ gts->ts_force_cch_reload = 1;
goto failupm;
- if (non_atomic_pte_lookup(vma, vaddr, write, &paddr,
- &pageshift))
- goto failinval;
+ }
+ }
+
+ if (unlikely(cbe) && pageshift == PAGE_SHIFT) {
+ gru_preload_tlb(gts->ts_gru, gts, atomic, vaddr, asid, write, tlb_preload_count, tfh, cbe);
+ gru_flush_cache_cbe(cbe);
}
- if (is_gru_paddr(paddr))
- goto failinval;
- paddr = paddr & ~((1UL << pageshift) - 1);
- gpa = uv_soc_phys_ram_to_gpa(paddr);
- gru_cb_set_istatus_active(cb);
+ gru_cb_set_istatus_active(cbk);
tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write,
GRU_PAGESIZE(pageshift));
- STAT(tlb_dropin);
gru_dbg(grudev,
- "%s: tfh 0x%p, vaddr 0x%lx, asid 0x%x, ps %d, gpa 0x%lx\n",
- ret ? "non-atomic" : "atomic", tfh, vaddr, asid,
- pageshift, gpa);
+ "%s: gid %d, gts 0x%p, tfh 0x%p, vaddr 0x%lx, asid 0x%x, indexway 0x%x,"
+ " rw %d, ps %d, gpa 0x%lx\n",
+ atomic ? "atomic" : "non-atomic", gts->ts_gru->gs_gid, gts, tfh, vaddr, asid,
+ indexway, write, pageshift, gpa);
+ STAT(tlb_dropin);
return 0;
failnoasid:
/* No asid (delayed unload). */
STAT(tlb_dropin_fail_no_asid);
gru_dbg(grudev, "FAILED no_asid tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr);
- if (!cb)
+ if (!cbk)
tfh_user_polling_mode(tfh);
else
gru_flush_cache(tfh);
+ gru_flush_cache_cbe(cbe);
return -EAGAIN;
failupm:
/* Atomic failure switch CBR to UPM */
tfh_user_polling_mode(tfh);
+ gru_flush_cache_cbe(cbe);
STAT(tlb_dropin_fail_upm);
gru_dbg(grudev, "FAILED upm tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr);
return 1;
failfmm:
/* FMM state on UPM call */
gru_flush_cache(tfh);
+ gru_flush_cache_cbe(cbe);
STAT(tlb_dropin_fail_fmm);
gru_dbg(grudev, "FAILED fmm tfh: 0x%p, state %d\n", tfh, tfh->state);
return 0;
+failnoexception:
+ /* TFH status did not show exception pending */
+ gru_flush_cache(tfh);
+ gru_flush_cache_cbe(cbe);
+ if (cbk)
+ gru_flush_cache(cbk);
+ STAT(tlb_dropin_fail_no_exception);
+ gru_dbg(grudev, "FAILED non-exception tfh: 0x%p, status %d, state %d\n",
+ tfh, tfh->status, tfh->state);
+ return 0;
+
failidle:
- /* TFH was idle - no miss pending */
+ /* TFH state was idle - no miss pending */
gru_flush_cache(tfh);
- if (cb)
- gru_flush_cache(cb);
+ gru_flush_cache_cbe(cbe);
+ if (cbk)
+ gru_flush_cache(cbk);
STAT(tlb_dropin_fail_idle);
gru_dbg(grudev, "FAILED idle tfh: 0x%p, state %d\n", tfh, tfh->state);
return 0;
failinval:
/* All errors (atomic & non-atomic) switch CBR to EXCEPTION state */
tfh_exception(tfh);
+ gru_flush_cache_cbe(cbe);
STAT(tlb_dropin_fail_invalid);
gru_dbg(grudev, "FAILED inval tfh: 0x%p, vaddr 0x%lx\n", tfh, vaddr);
return -EFAULT;
failactive:
/* Range invalidate active. Switch to UPM iff atomic */
- if (!cb)
+ if (!cbk)
tfh_user_polling_mode(tfh);
else
gru_flush_cache(tfh);
+ gru_flush_cache_cbe(cbe);
STAT(tlb_dropin_fail_range_active);
gru_dbg(grudev, "FAILED range active: tfh 0x%p, vaddr 0x%lx\n",
tfh, vaddr);
* Note that this is the interrupt handler that is registered with linux
* interrupt handlers.
*/
-irqreturn_t gru_intr(int irq, void *dev_id)
+static irqreturn_t gru_intr(int chiplet, int blade)
{
struct gru_state *gru;
- struct gru_tlb_fault_map map;
+ struct gru_tlb_fault_map imap, dmap;
struct gru_thread_state *gts;
struct gru_tlb_fault_handle *tfh = NULL;
int cbrnum, ctxnum;
STAT(intr);
- gru = irq_to_gru(irq);
+ gru = &gru_base[blade]->bs_grus[chiplet];
if (!gru) {
- dev_err(grudev, "GRU: invalid interrupt: cpu %d, irq %d\n",
- raw_smp_processor_id(), irq);
+ dev_err(grudev, "GRU: invalid interrupt: cpu %d, chiplet %d\n",
+ raw_smp_processor_id(), chiplet);
return IRQ_NONE;
}
- get_clear_fault_map(gru, &map);
- gru_dbg(grudev, "irq %d, gru %x, map 0x%lx\n", irq, gru->gs_gid,
- map.fault_bits[0]);
+ get_clear_fault_map(gru, &imap, &dmap);
+ gru_dbg(grudev,
+ "cpu %d, chiplet %d, gid %d, imap %016lx %016lx, dmap %016lx %016lx\n",
+ smp_processor_id(), chiplet, gru->gs_gid,
+ imap.fault_bits[0], imap.fault_bits[1],
+ dmap.fault_bits[0], dmap.fault_bits[1]);
+
+ for_each_cbr_in_tfm(cbrnum, dmap.fault_bits) {
+ STAT(intr_cbr);
+ complete(gru->gs_blade->bs_async_wq);
+ gru_dbg(grudev, "gid %d, cbr_done %d, done %d\n",
+ gru->gs_gid, cbrnum, gru->gs_blade->bs_async_wq->done);
+ }
- for_each_cbr_in_tfm(cbrnum, map.fault_bits) {
+ for_each_cbr_in_tfm(cbrnum, imap.fault_bits) {
+ STAT(intr_tfh);
tfh = get_tfh_by_index(gru, cbrnum);
prefetchw(tfh); /* Helps on hdw, required for emulator */
* This is running in interrupt context. Trylock the mmap_sem.
* If it fails, retry the fault in user context.
*/
- if (down_read_trylock(>s->ts_mm->mmap_sem)) {
+ if (!gts->ts_force_cch_reload &&
+ down_read_trylock(>s->ts_mm->mmap_sem)) {
+ gts->ustats.fmm_tlbdropin++;
gru_try_dropin(gts, tfh, NULL);
up_read(>s->ts_mm->mmap_sem);
} else {
return IRQ_HANDLED;
}
+irqreturn_t gru0_intr(int irq, void *dev_id)
+{
+ return gru_intr(0, uv_numa_blade_id());
+}
+
+irqreturn_t gru1_intr(int irq, void *dev_id)
+{
+ return gru_intr(1, uv_numa_blade_id());
+}
+
+irqreturn_t gru_intr_mblade(int irq, void *dev_id)
+{
+ int blade;
+
+ for_each_possible_blade(blade) {
+ if (uv_blade_nr_possible_cpus(blade))
+ continue;
+ gru_intr(0, blade);
+ gru_intr(1, blade);
+ }
+ return IRQ_HANDLED;
+}
+
static int gru_user_dropin(struct gru_thread_state *gts,
struct gru_tlb_fault_handle *tfh,
- unsigned long __user *cb)
+ void *cb)
{
struct gru_mm_struct *gms = gts->ts_gms;
int ret;
+ gts->ustats.upm_tlbdropin++;
while (1) {
wait_event(gms->ms_wait_queue,
atomic_read(&gms->ms_range_active) == 0);
{
struct gru_tlb_fault_handle *tfh;
struct gru_thread_state *gts;
- unsigned long __user *cbp;
+ void *cbk;
int ucbnum, cbrnum, ret = -EINVAL;
STAT(call_os);
- gru_dbg(grudev, "address 0x%lx\n", cb);
/* sanity check the cb pointer */
ucbnum = get_cb_number((void *)cb);
if ((cb & (GRU_HANDLE_STRIDE - 1)) || ucbnum >= GRU_NUM_CB)
return -EINVAL;
- cbp = (unsigned long *)cb;
gts = gru_find_lock_gts(cb);
if (!gts)
return -EINVAL;
+ gru_dbg(grudev, "address 0x%lx, gid %d, gts 0x%p\n", cb, gts->ts_gru ? gts->ts_gru->gs_gid : -1, gts);
if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE)
goto exit;
+ gru_check_context_placement(gts);
+
/*
- * If force_unload is set, the UPM TLB fault is phony. The task
- * has migrated to another node and the GSEG must be moved. Just
- * unload the context. The task will page fault and assign a new
- * context.
+ * CCH may contain stale data if ts_force_cch_reload is set.
*/
- if (gts->ts_tgid_owner == current->tgid && gts->ts_blade >= 0 &&
- gts->ts_blade != uv_numa_blade_id()) {
- STAT(call_os_offnode_reference);
- gts->ts_force_unload = 1;
+ if (gts->ts_gru && gts->ts_force_cch_reload) {
+ gts->ts_force_cch_reload = 0;
+ gru_update_cch(gts);
}
ret = -EAGAIN;
cbrnum = thread_cbr_number(gts, ucbnum);
- if (gts->ts_force_unload) {
- gru_unload_context(gts, 1);
- } else if (gts->ts_gru) {
+ if (gts->ts_gru) {
tfh = get_tfh_by_index(gts->ts_gru, cbrnum);
- ret = gru_user_dropin(gts, tfh, cbp);
+ cbk = get_gseg_base_address_cb(gts->ts_gru->gs_gru_base_vaddr,
+ gts->ts_ctxnum, ucbnum);
+ ret = gru_user_dropin(gts, tfh, cbk);
}
exit:
gru_unlock_gts(gts);
if (copy_from_user(&excdet, (void __user *)arg, sizeof(excdet)))
return -EFAULT;
- gru_dbg(grudev, "address 0x%lx\n", excdet.cb);
gts = gru_find_lock_gts(excdet.cb);
if (!gts)
return -EINVAL;
+ gru_dbg(grudev, "address 0x%lx, gid %d, gts 0x%p\n", excdet.cb, gts->ts_gru ? gts->ts_gru->gs_gid : -1, gts);
ucbnum = get_cb_number((void *)excdet.cb);
if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE) {
ret = -EINVAL;
} else if (gts->ts_gru) {
cbrnum = thread_cbr_number(gts, ucbnum);
cbe = get_cbe_by_index(gts->ts_gru, cbrnum);
- prefetchw(cbe);/* Harmless on hardware, required for emulator */
+ gru_flush_cache(cbe); /* CBE not coherent */
+ sync_core(); /* make sure we are have current data */
excdet.opc = cbe->opccpy;
excdet.exopc = cbe->exopccpy;
excdet.ecause = cbe->ecause;
excdet.exceptdet0 = cbe->idef1upd;
excdet.exceptdet1 = cbe->idef3upd;
+ excdet.cbrstate = cbe->cbrstate;
+ excdet.cbrexecstatus = cbe->cbrexecstatus;
+ gru_flush_cache_cbe(cbe);
ret = 0;
} else {
ret = -EAGAIN;
}
gru_unlock_gts(gts);
- gru_dbg(grudev, "address 0x%lx, ecause 0x%x\n", excdet.cb,
- excdet.ecause);
+ gru_dbg(grudev,
+ "cb 0x%lx, op %d, exopc %d, cbrstate %d, cbrexecstatus 0x%x, ecause 0x%x, "
+ "exdet0 0x%lx, exdet1 0x%x\n",
+ excdet.cb, excdet.opc, excdet.exopc, excdet.cbrstate, excdet.cbrexecstatus,
+ excdet.ecause, excdet.exceptdet0, excdet.exceptdet1);
if (!ret && copy_to_user((void __user *)arg, &excdet, sizeof(excdet)))
ret = -EFAULT;
return ret;
/*
* User request to unload a context. Content is saved for possible reload.
*/
+static int gru_unload_all_contexts(void)
+{
+ struct gru_thread_state *gts;
+ struct gru_state *gru;
+ int gid, ctxnum;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ foreach_gid(gid) {
+ gru = GID_TO_GRU(gid);
+ spin_lock(&gru->gs_lock);
+ for (ctxnum = 0; ctxnum < GRU_NUM_CCH; ctxnum++) {
+ gts = gru->gs_gts[ctxnum];
+ if (gts && mutex_trylock(>s->ts_ctxlock)) {
+ spin_unlock(&gru->gs_lock);
+ gru_unload_context(gts, 1);
+ mutex_unlock(>s->ts_ctxlock);
+ spin_lock(&gru->gs_lock);
+ }
+ }
+ spin_unlock(&gru->gs_lock);
+ }
+ return 0;
+}
+
int gru_user_unload_context(unsigned long arg)
{
struct gru_thread_state *gts;
gru_dbg(grudev, "gseg 0x%lx\n", req.gseg);
+ if (!req.gseg)
+ return gru_unload_all_contexts();
+
gts = gru_find_lock_gts(req.gseg);
if (!gts)
return -EINVAL;
{
struct gru_thread_state *gts;
struct gru_flush_tlb_req req;
+ struct gru_mm_struct *gms;
STAT(user_flush_tlb);
if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
if (!gts)
return -EINVAL;
- gru_flush_tlb_range(gts->ts_gms, req.vaddr, req.len);
+ gms = gts->ts_gms;
gru_unlock_gts(gts);
+ gru_flush_tlb_range(gms, req.vaddr, req.len);
+
+ return 0;
+}
+
+/*
+ * Fetch GSEG statisticss
+ */
+long gru_get_gseg_statistics(unsigned long arg)
+{
+ struct gru_thread_state *gts;
+ struct gru_get_gseg_statistics_req req;
+
+ if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
+ return -EFAULT;
+
+ /*
+ * The library creates arrays of contexts for threaded programs.
+ * If no gts exists in the array, the context has never been used & all
+ * statistics are implicitly 0.
+ */
+ gts = gru_find_lock_gts(req.gseg);
+ if (gts) {
+ memcpy(&req.stats, >s->ustats, sizeof(gts->ustats));
+ gru_unlock_gts(gts);
+ } else {
+ memset(&req.stats, 0, sizeof(gts->ustats));
+ }
+
+ if (copy_to_user((void __user *)arg, &req, sizeof(req)))
+ return -EFAULT;
return 0;
}
* Register the current task as the user of the GSEG slice.
* Needed for TLB fault interrupt targeting.
*/
-int gru_set_task_slice(long address)
+int gru_set_context_option(unsigned long arg)
{
struct gru_thread_state *gts;
+ struct gru_set_context_option_req req;
+ int ret = 0;
- STAT(set_task_slice);
- gru_dbg(grudev, "address 0x%lx\n", address);
- gts = gru_alloc_locked_gts(address);
- if (!gts)
- return -EINVAL;
+ STAT(set_context_option);
+ if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
+ return -EFAULT;
+ gru_dbg(grudev, "op %d, gseg 0x%lx, value1 0x%lx\n", req.op, req.gseg, req.val1);
- gts->ts_tgid_owner = current->tgid;
+ gts = gru_find_lock_gts(req.gseg);
+ if (!gts) {
+ gts = gru_alloc_locked_gts(req.gseg);
+ if (IS_ERR(gts))
+ return PTR_ERR(gts);
+ }
+
+ switch (req.op) {
+ case sco_blade_chiplet:
+ /* Select blade/chiplet for GRU context */
+ if (req.val1 < -1 || req.val1 >= GRU_MAX_BLADES || !gru_base[req.val1] ||
+ req.val0 < -1 || req.val0 >= GRU_CHIPLETS_PER_HUB) {
+ ret = -EINVAL;
+ } else {
+ gts->ts_user_blade_id = req.val1;
+ gts->ts_user_chiplet_id = req.val0;
+ gru_check_context_placement(gts);
+ }
+ break;
+ case sco_gseg_owner:
+ /* Register the current task as the GSEG owner */
+ gts->ts_tgid_owner = current->tgid;
+ break;
+ case sco_cch_req_slice:
+ /* Set the CCH slice option */
+ gts->ts_cch_req_slice = req.val1 & 3;
+ break;
+ default:
+ ret = -EINVAL;
+ }
gru_unlock_gts(gts);
- return 0;
+ return ret;
}
Code Review / linux-2.6.git / blobdiff