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-rw-r--r--sys/dev/drm2/ttm/ttm_memory.c471
1 files changed, 471 insertions, 0 deletions
diff --git a/sys/dev/drm2/ttm/ttm_memory.c b/sys/dev/drm2/ttm/ttm_memory.c
new file mode 100644
index 0000000..ee74d94
--- /dev/null
+++ b/sys/dev/drm2/ttm/ttm_memory.c
@@ -0,0 +1,471 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <dev/drm2/drmP.h>
+#include <dev/drm2/ttm/ttm_memory.h>
+#include <dev/drm2/ttm/ttm_module.h>
+#include <dev/drm2/ttm/ttm_page_alloc.h>
+
+#define TTM_MEMORY_ALLOC_RETRIES 4
+
+struct ttm_mem_zone {
+ u_int kobj_ref;
+ struct ttm_mem_global *glob;
+ const char *name;
+ uint64_t zone_mem;
+ uint64_t emer_mem;
+ uint64_t max_mem;
+ uint64_t swap_limit;
+ uint64_t used_mem;
+};
+
+MALLOC_DEFINE(M_TTM_ZONE, "ttm_zone", "TTM Zone");
+
+static void ttm_mem_zone_kobj_release(struct ttm_mem_zone *zone)
+{
+
+ printf("pTTM] Zone %7s: Used memory at exit: %llu kiB\n",
+ zone->name, (unsigned long long)zone->used_mem >> 10);
+ free(zone, M_TTM_ZONE);
+}
+
+#if 0
+/* XXXKIB sysctl */
+static ssize_t ttm_mem_zone_show(struct ttm_mem_zone *zone;
+ struct attribute *attr,
+ char *buffer)
+{
+ uint64_t val = 0;
+
+ mtx_lock(&zone->glob->lock);
+ if (attr == &ttm_mem_sys)
+ val = zone->zone_mem;
+ else if (attr == &ttm_mem_emer)
+ val = zone->emer_mem;
+ else if (attr == &ttm_mem_max)
+ val = zone->max_mem;
+ else if (attr == &ttm_mem_swap)
+ val = zone->swap_limit;
+ else if (attr == &ttm_mem_used)
+ val = zone->used_mem;
+ mtx_unlock(&zone->glob->lock);
+
+ return snprintf(buffer, PAGE_SIZE, "%llu\n",
+ (unsigned long long) val >> 10);
+}
+#endif
+
+static void ttm_check_swapping(struct ttm_mem_global *glob);
+
+#if 0
+/* XXXKIB sysctl */
+static ssize_t ttm_mem_zone_store(struct ttm_mem_zone *zone,
+ struct attribute *attr,
+ const char *buffer,
+ size_t size)
+{
+ int chars;
+ unsigned long val;
+ uint64_t val64;
+
+ chars = sscanf(buffer, "%lu", &val);
+ if (chars == 0)
+ return size;
+
+ val64 = val;
+ val64 <<= 10;
+
+ mtx_lock(&zone->glob->lock);
+ if (val64 > zone->zone_mem)
+ val64 = zone->zone_mem;
+ if (attr == &ttm_mem_emer) {
+ zone->emer_mem = val64;
+ if (zone->max_mem > val64)
+ zone->max_mem = val64;
+ } else if (attr == &ttm_mem_max) {
+ zone->max_mem = val64;
+ if (zone->emer_mem < val64)
+ zone->emer_mem = val64;
+ } else if (attr == &ttm_mem_swap)
+ zone->swap_limit = val64;
+ mtx_unlock(&zone->glob->lock);
+
+ ttm_check_swapping(zone->glob);
+
+ return size;
+}
+#endif
+
+static void ttm_mem_global_kobj_release(struct ttm_mem_global *glob)
+{
+
+ free(glob, M_TTM_ZONE);
+}
+
+static bool ttm_zones_above_swap_target(struct ttm_mem_global *glob,
+ bool from_wq, uint64_t extra)
+{
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+ uint64_t target;
+
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+
+ if (from_wq)
+ target = zone->swap_limit;
+ else if (priv_check(curthread, PRIV_VM_MLOCK) == 0)
+ target = zone->emer_mem;
+ else
+ target = zone->max_mem;
+
+ target = (extra > target) ? 0ULL : target;
+
+ if (zone->used_mem > target)
+ return true;
+ }
+ return false;
+}
+
+/**
+ * At this point we only support a single shrink callback.
+ * Extend this if needed, perhaps using a linked list of callbacks.
+ * Note that this function is reentrant:
+ * many threads may try to swap out at any given time.
+ */
+
+static void ttm_shrink(struct ttm_mem_global *glob, bool from_wq,
+ uint64_t extra)
+{
+ int ret;
+ struct ttm_mem_shrink *shrink;
+
+ mtx_lock(&glob->lock);
+ if (glob->shrink == NULL)
+ goto out;
+
+ while (ttm_zones_above_swap_target(glob, from_wq, extra)) {
+ shrink = glob->shrink;
+ mtx_unlock(&glob->lock);
+ ret = shrink->do_shrink(shrink);
+ mtx_lock(&glob->lock);
+ if (unlikely(ret != 0))
+ goto out;
+ }
+out:
+ mtx_unlock(&glob->lock);
+}
+
+
+
+static void ttm_shrink_work(void *arg, int pending __unused)
+{
+ struct ttm_mem_global *glob = arg;
+
+ ttm_shrink(glob, true, 0ULL);
+}
+
+static int ttm_mem_init_kernel_zone(struct ttm_mem_global *glob,
+ uint64_t mem)
+{
+ struct ttm_mem_zone *zone;
+
+ zone = malloc(sizeof(*zone), M_TTM_ZONE, M_WAITOK | M_ZERO);
+
+ zone->name = "kernel";
+ zone->zone_mem = mem;
+ zone->max_mem = mem >> 1;
+ zone->emer_mem = (mem >> 1) + (mem >> 2);
+ zone->swap_limit = zone->max_mem - (mem >> 3);
+ zone->used_mem = 0;
+ zone->glob = glob;
+ glob->zone_kernel = zone;
+ refcount_init(&zone->kobj_ref, 1);
+ glob->zones[glob->num_zones++] = zone;
+ return 0;
+}
+
+static int ttm_mem_init_dma32_zone(struct ttm_mem_global *glob,
+ uint64_t mem)
+{
+ struct ttm_mem_zone *zone;
+
+ zone = malloc(sizeof(*zone), M_TTM_ZONE, M_WAITOK | M_ZERO);
+
+ /**
+ * No special dma32 zone needed.
+ */
+
+ if (mem <= ((uint64_t) 1ULL << 32)) {
+ free(zone, M_TTM_ZONE);
+ return 0;
+ }
+
+ /*
+ * Limit max dma32 memory to 4GB for now
+ * until we can figure out how big this
+ * zone really is.
+ */
+
+ mem = ((uint64_t) 1ULL << 32);
+ zone->name = "dma32";
+ zone->zone_mem = mem;
+ zone->max_mem = mem >> 1;
+ zone->emer_mem = (mem >> 1) + (mem >> 2);
+ zone->swap_limit = zone->max_mem - (mem >> 3);
+ zone->used_mem = 0;
+ zone->glob = glob;
+ glob->zone_dma32 = zone;
+ refcount_init(&zone->kobj_ref, 1);
+ glob->zones[glob->num_zones++] = zone;
+ return 0;
+}
+
+int ttm_mem_global_init(struct ttm_mem_global *glob)
+{
+ u_int64_t mem;
+ int ret;
+ int i;
+ struct ttm_mem_zone *zone;
+
+ mtx_init(&glob->lock, "ttmgz", NULL, MTX_DEF);
+ glob->swap_queue = taskqueue_create("ttm_swap", M_WAITOK,
+ taskqueue_thread_enqueue, &glob->swap_queue);
+ taskqueue_start_threads(&glob->swap_queue, 1, PVM, "ttm swap");
+ TASK_INIT(&glob->work, 0, ttm_shrink_work, glob);
+
+ refcount_init(&glob->kobj_ref, 1);
+
+ mem = physmem * PAGE_SIZE;
+
+ ret = ttm_mem_init_kernel_zone(glob, mem);
+ if (unlikely(ret != 0))
+ goto out_no_zone;
+ ret = ttm_mem_init_dma32_zone(glob, mem);
+ if (unlikely(ret != 0))
+ goto out_no_zone;
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ printf("[TTM] Zone %7s: Available graphics memory: %llu kiB\n",
+ zone->name, (unsigned long long)zone->max_mem >> 10);
+ }
+ ttm_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
+ ttm_dma_page_alloc_init(glob, glob->zone_kernel->max_mem/(2*PAGE_SIZE));
+ return 0;
+out_no_zone:
+ ttm_mem_global_release(glob);
+ return ret;
+}
+
+void ttm_mem_global_release(struct ttm_mem_global *glob)
+{
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ /* let the page allocator first stop the shrink work. */
+ ttm_page_alloc_fini();
+ ttm_dma_page_alloc_fini();
+
+ taskqueue_drain(glob->swap_queue, &glob->work);
+ taskqueue_free(glob->swap_queue);
+ glob->swap_queue = NULL;
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (refcount_release(&zone->kobj_ref))
+ ttm_mem_zone_kobj_release(zone);
+ }
+ if (refcount_release(&glob->kobj_ref))
+ ttm_mem_global_kobj_release(glob);
+}
+
+static void ttm_check_swapping(struct ttm_mem_global *glob)
+{
+ bool needs_swapping = false;
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ mtx_lock(&glob->lock);
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (zone->used_mem > zone->swap_limit) {
+ needs_swapping = true;
+ break;
+ }
+ }
+
+ mtx_unlock(&glob->lock);
+
+ if (unlikely(needs_swapping))
+ taskqueue_enqueue(glob->swap_queue, &glob->work);
+
+}
+
+static void ttm_mem_global_free_zone(struct ttm_mem_global *glob,
+ struct ttm_mem_zone *single_zone,
+ uint64_t amount)
+{
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ mtx_lock(&glob->lock);
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (single_zone && zone != single_zone)
+ continue;
+ zone->used_mem -= amount;
+ }
+ mtx_unlock(&glob->lock);
+}
+
+void ttm_mem_global_free(struct ttm_mem_global *glob,
+ uint64_t amount)
+{
+ return ttm_mem_global_free_zone(glob, NULL, amount);
+}
+
+static int ttm_mem_global_reserve(struct ttm_mem_global *glob,
+ struct ttm_mem_zone *single_zone,
+ uint64_t amount, bool reserve)
+{
+ uint64_t limit;
+ int ret = -ENOMEM;
+ unsigned int i;
+ struct ttm_mem_zone *zone;
+
+ mtx_lock(&glob->lock);
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (single_zone && zone != single_zone)
+ continue;
+
+ limit = (priv_check(curthread, PRIV_VM_MLOCK) == 0) ?
+ zone->emer_mem : zone->max_mem;
+
+ if (zone->used_mem > limit)
+ goto out_unlock;
+ }
+
+ if (reserve) {
+ for (i = 0; i < glob->num_zones; ++i) {
+ zone = glob->zones[i];
+ if (single_zone && zone != single_zone)
+ continue;
+ zone->used_mem += amount;
+ }
+ }
+
+ ret = 0;
+out_unlock:
+ mtx_unlock(&glob->lock);
+ ttm_check_swapping(glob);
+
+ return ret;
+}
+
+
+static int ttm_mem_global_alloc_zone(struct ttm_mem_global *glob,
+ struct ttm_mem_zone *single_zone,
+ uint64_t memory,
+ bool no_wait, bool interruptible)
+{
+ int count = TTM_MEMORY_ALLOC_RETRIES;
+
+ while (unlikely(ttm_mem_global_reserve(glob,
+ single_zone,
+ memory, true)
+ != 0)) {
+ if (no_wait)
+ return -ENOMEM;
+ if (unlikely(count-- == 0))
+ return -ENOMEM;
+ ttm_shrink(glob, false, memory + (memory >> 2) + 16);
+ }
+
+ return 0;
+}
+
+int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
+ bool no_wait, bool interruptible)
+{
+ /**
+ * Normal allocations of kernel memory are registered in
+ * all zones.
+ */
+
+ return ttm_mem_global_alloc_zone(glob, NULL, memory, no_wait,
+ interruptible);
+}
+
+#define page_to_pfn(pp) OFF_TO_IDX(VM_PAGE_TO_PHYS(pp))
+
+int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
+ struct vm_page *page,
+ bool no_wait, bool interruptible)
+{
+
+ struct ttm_mem_zone *zone = NULL;
+
+ /**
+ * Page allocations may be registed in a single zone
+ * only if highmem or !dma32.
+ */
+
+ if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
+ zone = glob->zone_kernel;
+ return ttm_mem_global_alloc_zone(glob, zone, PAGE_SIZE, no_wait,
+ interruptible);
+}
+
+void ttm_mem_global_free_page(struct ttm_mem_global *glob, struct vm_page *page)
+{
+ struct ttm_mem_zone *zone = NULL;
+
+ if (glob->zone_dma32 && page_to_pfn(page) > 0x00100000UL)
+ zone = glob->zone_kernel;
+ ttm_mem_global_free_zone(glob, zone, PAGE_SIZE);
+}
+
+
+size_t ttm_round_pot(size_t size)
+{
+ if ((size & (size - 1)) == 0)
+ return size;
+ else if (size > PAGE_SIZE)
+ return PAGE_ALIGN(size);
+ else {
+ size_t tmp_size = 4;
+
+ while (tmp_size < size)
+ tmp_size <<= 1;
+
+ return tmp_size;
+ }
+ return 0;
+}
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