blob: 7b2b0980ec412c034c4fc1323cdc2d4128867c9d [file] [log] [blame]
/*
* Copyright 2016 Advanced Micro Devices, Inc.
*
* 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, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* Authors: Christian K├Ânig
*/
#include <linux/dma-mapping.h>
#include <drm/ttm/ttm_range_manager.h>
#include "amdgpu.h"
#include "amdgpu_vm.h"
#include "amdgpu_res_cursor.h"
#include "amdgpu_atomfirmware.h"
#include "atom.h"
struct amdgpu_vram_reservation {
struct list_head node;
struct drm_mm_node mm_node;
};
static inline struct amdgpu_vram_mgr *
to_vram_mgr(struct ttm_resource_manager *man)
{
return container_of(man, struct amdgpu_vram_mgr, manager);
}
static inline struct amdgpu_device *
to_amdgpu_device(struct amdgpu_vram_mgr *mgr)
{
return container_of(mgr, struct amdgpu_device, mman.vram_mgr);
}
/**
* DOC: mem_info_vram_total
*
* The amdgpu driver provides a sysfs API for reporting current total VRAM
* available on the device
* The file mem_info_vram_total is used for this and returns the total
* amount of VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
return sysfs_emit(buf, "%llu\n", adev->gmc.real_vram_size);
}
/**
* DOC: mem_info_vis_vram_total
*
* The amdgpu driver provides a sysfs API for reporting current total
* visible VRAM available on the device
* The file mem_info_vis_vram_total is used for this and returns the total
* amount of visible VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
return sysfs_emit(buf, "%llu\n", adev->gmc.visible_vram_size);
}
/**
* DOC: mem_info_vram_used
*
* The amdgpu driver provides a sysfs API for reporting current total VRAM
* available on the device
* The file mem_info_vram_used is used for this and returns the total
* amount of currently used VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
struct ttm_resource_manager *man;
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_usage(man));
}
/**
* DOC: mem_info_vis_vram_used
*
* The amdgpu driver provides a sysfs API for reporting current total of
* used visible VRAM
* The file mem_info_vis_vram_used is used for this and returns the total
* amount of currently used visible VRAM in bytes
*/
static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
struct ttm_resource_manager *man;
man = ttm_manager_type(&adev->mman.bdev, TTM_PL_VRAM);
return sysfs_emit(buf, "%llu\n", amdgpu_vram_mgr_vis_usage(man));
}
/**
* DOC: mem_info_vram_vendor
*
* The amdgpu driver provides a sysfs API for reporting the vendor of the
* installed VRAM
* The file mem_info_vram_vendor is used for this and returns the name of the
* vendor.
*/
static ssize_t amdgpu_mem_info_vram_vendor(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
switch (adev->gmc.vram_vendor) {
case SAMSUNG:
return sysfs_emit(buf, "samsung\n");
case INFINEON:
return sysfs_emit(buf, "infineon\n");
case ELPIDA:
return sysfs_emit(buf, "elpida\n");
case ETRON:
return sysfs_emit(buf, "etron\n");
case NANYA:
return sysfs_emit(buf, "nanya\n");
case HYNIX:
return sysfs_emit(buf, "hynix\n");
case MOSEL:
return sysfs_emit(buf, "mosel\n");
case WINBOND:
return sysfs_emit(buf, "winbond\n");
case ESMT:
return sysfs_emit(buf, "esmt\n");
case MICRON:
return sysfs_emit(buf, "micron\n");
default:
return sysfs_emit(buf, "unknown\n");
}
}
static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
amdgpu_mem_info_vram_total_show, NULL);
static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
amdgpu_mem_info_vis_vram_total_show,NULL);
static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
amdgpu_mem_info_vram_used_show, NULL);
static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
amdgpu_mem_info_vis_vram_used_show, NULL);
static DEVICE_ATTR(mem_info_vram_vendor, S_IRUGO,
amdgpu_mem_info_vram_vendor, NULL);
static struct attribute *amdgpu_vram_mgr_attributes[] = {
&dev_attr_mem_info_vram_total.attr,
&dev_attr_mem_info_vis_vram_total.attr,
&dev_attr_mem_info_vram_used.attr,
&dev_attr_mem_info_vis_vram_used.attr,
&dev_attr_mem_info_vram_vendor.attr,
NULL
};
const struct attribute_group amdgpu_vram_mgr_attr_group = {
.attrs = amdgpu_vram_mgr_attributes
};
/**
* amdgpu_vram_mgr_vis_size - Calculate visible node size
*
* @adev: amdgpu_device pointer
* @node: MM node structure
*
* Calculate how many bytes of the MM node are inside visible VRAM
*/
static u64 amdgpu_vram_mgr_vis_size(struct amdgpu_device *adev,
struct drm_mm_node *node)
{
uint64_t start = node->start << PAGE_SHIFT;
uint64_t end = (node->size + node->start) << PAGE_SHIFT;
if (start >= adev->gmc.visible_vram_size)
return 0;
return (end > adev->gmc.visible_vram_size ?
adev->gmc.visible_vram_size : end) - start;
}
/**
* amdgpu_vram_mgr_bo_visible_size - CPU visible BO size
*
* @bo: &amdgpu_bo buffer object (must be in VRAM)
*
* Returns:
* How much of the given &amdgpu_bo buffer object lies in CPU visible VRAM.
*/
u64 amdgpu_vram_mgr_bo_visible_size(struct amdgpu_bo *bo)
{
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct ttm_resource *res = bo->tbo.resource;
unsigned pages = res->num_pages;
struct drm_mm_node *mm;
u64 usage;
if (amdgpu_gmc_vram_full_visible(&adev->gmc))
return amdgpu_bo_size(bo);
if (res->start >= adev->gmc.visible_vram_size >> PAGE_SHIFT)
return 0;
mm = &container_of(res, struct ttm_range_mgr_node, base)->mm_nodes[0];
for (usage = 0; pages; pages -= mm->size, mm++)
usage += amdgpu_vram_mgr_vis_size(adev, mm);
return usage;
}
/* Commit the reservation of VRAM pages */
static void amdgpu_vram_mgr_do_reserve(struct ttm_resource_manager *man)
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_device *adev = to_amdgpu_device(mgr);
struct drm_mm *mm = &mgr->mm;
struct amdgpu_vram_reservation *rsv, *temp;
uint64_t vis_usage;
list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node) {
if (drm_mm_reserve_node(mm, &rsv->mm_node))
continue;
dev_dbg(adev->dev, "Reservation 0x%llx - %lld, Succeeded\n",
rsv->mm_node.start, rsv->mm_node.size);
vis_usage = amdgpu_vram_mgr_vis_size(adev, &rsv->mm_node);
atomic64_add(vis_usage, &mgr->vis_usage);
atomic64_add(rsv->mm_node.size << PAGE_SHIFT, &mgr->usage);
list_move(&rsv->node, &mgr->reserved_pages);
}
}
/**
* amdgpu_vram_mgr_reserve_range - Reserve a range from VRAM
*
* @man: TTM memory type manager
* @start: start address of the range in VRAM
* @size: size of the range
*
* Reserve memory from start addess with the specified size in VRAM
*/
int amdgpu_vram_mgr_reserve_range(struct ttm_resource_manager *man,
uint64_t start, uint64_t size)
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_vram_reservation *rsv;
rsv = kzalloc(sizeof(*rsv), GFP_KERNEL);
if (!rsv)
return -ENOMEM;
INIT_LIST_HEAD(&rsv->node);
rsv->mm_node.start = start >> PAGE_SHIFT;
rsv->mm_node.size = size >> PAGE_SHIFT;
spin_lock(&mgr->lock);
list_add_tail(&mgr->reservations_pending, &rsv->node);
amdgpu_vram_mgr_do_reserve(man);
spin_unlock(&mgr->lock);
return 0;
}
/**
* amdgpu_vram_mgr_query_page_status - query the reservation status
*
* @man: TTM memory type manager
* @start: start address of a page in VRAM
*
* Returns:
* -EBUSY: the page is still hold and in pending list
* 0: the page has been reserved
* -ENOENT: the input page is not a reservation
*/
int amdgpu_vram_mgr_query_page_status(struct ttm_resource_manager *man,
uint64_t start)
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_vram_reservation *rsv;
int ret;
spin_lock(&mgr->lock);
list_for_each_entry(rsv, &mgr->reservations_pending, node) {
if ((rsv->mm_node.start <= start) &&
(start < (rsv->mm_node.start + rsv->mm_node.size))) {
ret = -EBUSY;
goto out;
}
}
list_for_each_entry(rsv, &mgr->reserved_pages, node) {
if ((rsv->mm_node.start <= start) &&
(start < (rsv->mm_node.start + rsv->mm_node.size))) {
ret = 0;
goto out;
}
}
ret = -ENOENT;
out:
spin_unlock(&mgr->lock);
return ret;
}
/**
* amdgpu_vram_mgr_virt_start - update virtual start address
*
* @mem: ttm_resource to update
* @node: just allocated node
*
* Calculate a virtual BO start address to easily check if everything is CPU
* accessible.
*/
static void amdgpu_vram_mgr_virt_start(struct ttm_resource *mem,
struct drm_mm_node *node)
{
unsigned long start;
start = node->start + node->size;
if (start > mem->num_pages)
start -= mem->num_pages;
else
start = 0;
mem->start = max(mem->start, start);
}
/**
* amdgpu_vram_mgr_new - allocate new ranges
*
* @man: TTM memory type manager
* @tbo: TTM BO we need this range for
* @place: placement flags and restrictions
* @res: the resulting mem object
*
* Allocate VRAM for the given BO.
*/
static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_resource **res)
{
unsigned long lpfn, num_nodes, pages_per_node, pages_left, pages;
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_device *adev = to_amdgpu_device(mgr);
uint64_t vis_usage = 0, mem_bytes, max_bytes;
struct ttm_range_mgr_node *node;
struct drm_mm *mm = &mgr->mm;
enum drm_mm_insert_mode mode;
unsigned i;
int r;
lpfn = place->lpfn;
if (!lpfn)
lpfn = man->size;
max_bytes = adev->gmc.mc_vram_size;
if (tbo->type != ttm_bo_type_kernel)
max_bytes -= AMDGPU_VM_RESERVED_VRAM;
/* bail out quickly if there's likely not enough VRAM for this BO */
mem_bytes = tbo->base.size;
if (atomic64_add_return(mem_bytes, &mgr->usage) > max_bytes) {
r = -ENOSPC;
goto error_sub;
}
if (place->flags & TTM_PL_FLAG_CONTIGUOUS) {
pages_per_node = ~0ul;
num_nodes = 1;
} else {
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
pages_per_node = HPAGE_PMD_NR;
#else
/* default to 2MB */
pages_per_node = 2UL << (20UL - PAGE_SHIFT);
#endif
pages_per_node = max_t(uint32_t, pages_per_node,
tbo->page_alignment);
num_nodes = DIV_ROUND_UP_ULL(PFN_UP(mem_bytes), pages_per_node);
}
node = kvmalloc(struct_size(node, mm_nodes, num_nodes),
GFP_KERNEL | __GFP_ZERO);
if (!node) {
r = -ENOMEM;
goto error_sub;
}
ttm_resource_init(tbo, place, &node->base);
mode = DRM_MM_INSERT_BEST;
if (place->flags & TTM_PL_FLAG_TOPDOWN)
mode = DRM_MM_INSERT_HIGH;
pages_left = node->base.num_pages;
/* Limit maximum size to 2GB due to SG table limitations */
pages = min(pages_left, 2UL << (30 - PAGE_SHIFT));
i = 0;
spin_lock(&mgr->lock);
while (pages_left) {
uint32_t alignment = tbo->page_alignment;
if (pages >= pages_per_node)
alignment = pages_per_node;
r = drm_mm_insert_node_in_range(mm, &node->mm_nodes[i], pages,
alignment, 0, place->fpfn,
lpfn, mode);
if (unlikely(r)) {
if (pages > pages_per_node) {
if (is_power_of_2(pages))
pages = pages / 2;
else
pages = rounddown_pow_of_two(pages);
continue;
}
goto error_free;
}
vis_usage += amdgpu_vram_mgr_vis_size(adev, &node->mm_nodes[i]);
amdgpu_vram_mgr_virt_start(&node->base, &node->mm_nodes[i]);
pages_left -= pages;
++i;
if (pages > pages_left)
pages = pages_left;
}
spin_unlock(&mgr->lock);
if (i == 1)
node->base.placement |= TTM_PL_FLAG_CONTIGUOUS;
if (adev->gmc.xgmi.connected_to_cpu)
node->base.bus.caching = ttm_cached;
else
node->base.bus.caching = ttm_write_combined;
atomic64_add(vis_usage, &mgr->vis_usage);
*res = &node->base;
return 0;
error_free:
while (i--)
drm_mm_remove_node(&node->mm_nodes[i]);
spin_unlock(&mgr->lock);
kvfree(node);
error_sub:
atomic64_sub(mem_bytes, &mgr->usage);
return r;
}
/**
* amdgpu_vram_mgr_del - free ranges
*
* @man: TTM memory type manager
* @res: TTM memory object
*
* Free the allocated VRAM again.
*/
static void amdgpu_vram_mgr_del(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
struct amdgpu_device *adev = to_amdgpu_device(mgr);
uint64_t usage = 0, vis_usage = 0;
unsigned i, pages;
spin_lock(&mgr->lock);
for (i = 0, pages = res->num_pages; pages;
pages -= node->mm_nodes[i].size, ++i) {
struct drm_mm_node *mm = &node->mm_nodes[i];
drm_mm_remove_node(mm);
usage += mm->size << PAGE_SHIFT;
vis_usage += amdgpu_vram_mgr_vis_size(adev, mm);
}
amdgpu_vram_mgr_do_reserve(man);
spin_unlock(&mgr->lock);
atomic64_sub(usage, &mgr->usage);
atomic64_sub(vis_usage, &mgr->vis_usage);
kvfree(node);
}
/**
* amdgpu_vram_mgr_alloc_sgt - allocate and fill a sg table
*
* @adev: amdgpu device pointer
* @res: TTM memory object
* @offset: byte offset from the base of VRAM BO
* @length: number of bytes to export in sg_table
* @dev: the other device
* @dir: dma direction
* @sgt: resulting sg table
*
* Allocate and fill a sg table from a VRAM allocation.
*/
int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
struct ttm_resource *res,
u64 offset, u64 length,
struct device *dev,
enum dma_data_direction dir,
struct sg_table **sgt)
{
struct amdgpu_res_cursor cursor;
struct scatterlist *sg;
int num_entries = 0;
int i, r;
*sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
if (!*sgt)
return -ENOMEM;
/* Determine the number of DRM_MM nodes to export */
amdgpu_res_first(res, offset, length, &cursor);
while (cursor.remaining) {
num_entries++;
amdgpu_res_next(&cursor, cursor.size);
}
r = sg_alloc_table(*sgt, num_entries, GFP_KERNEL);
if (r)
goto error_free;
/* Initialize scatterlist nodes of sg_table */
for_each_sgtable_sg((*sgt), sg, i)
sg->length = 0;
/*
* Walk down DRM_MM nodes to populate scatterlist nodes
* @note: Use iterator api to get first the DRM_MM node
* and the number of bytes from it. Access the following
* DRM_MM node(s) if more buffer needs to exported
*/
amdgpu_res_first(res, offset, length, &cursor);
for_each_sgtable_sg((*sgt), sg, i) {
phys_addr_t phys = cursor.start + adev->gmc.aper_base;
size_t size = cursor.size;
dma_addr_t addr;
addr = dma_map_resource(dev, phys, size, dir,
DMA_ATTR_SKIP_CPU_SYNC);
r = dma_mapping_error(dev, addr);
if (r)
goto error_unmap;
sg_set_page(sg, NULL, size, 0);
sg_dma_address(sg) = addr;
sg_dma_len(sg) = size;
amdgpu_res_next(&cursor, cursor.size);
}
return 0;
error_unmap:
for_each_sgtable_sg((*sgt), sg, i) {
if (!sg->length)
continue;
dma_unmap_resource(dev, sg->dma_address,
sg->length, dir,
DMA_ATTR_SKIP_CPU_SYNC);
}
sg_free_table(*sgt);
error_free:
kfree(*sgt);
return r;
}
/**
* amdgpu_vram_mgr_free_sgt - allocate and fill a sg table
*
* @dev: device pointer
* @dir: data direction of resource to unmap
* @sgt: sg table to free
*
* Free a previously allocate sg table.
*/
void amdgpu_vram_mgr_free_sgt(struct device *dev,
enum dma_data_direction dir,
struct sg_table *sgt)
{
struct scatterlist *sg;
int i;
for_each_sgtable_sg(sgt, sg, i)
dma_unmap_resource(dev, sg->dma_address,
sg->length, dir,
DMA_ATTR_SKIP_CPU_SYNC);
sg_free_table(sgt);
kfree(sgt);
}
/**
* amdgpu_vram_mgr_usage - how many bytes are used in this domain
*
* @man: TTM memory type manager
*
* Returns how many bytes are used in this domain.
*/
uint64_t amdgpu_vram_mgr_usage(struct ttm_resource_manager *man)
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
return atomic64_read(&mgr->usage);
}
/**
* amdgpu_vram_mgr_vis_usage - how many bytes are used in the visible part
*
* @man: TTM memory type manager
*
* Returns how many bytes are used in the visible part of VRAM
*/
uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_resource_manager *man)
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
return atomic64_read(&mgr->vis_usage);
}
/**
* amdgpu_vram_mgr_debug - dump VRAM table
*
* @man: TTM memory type manager
* @printer: DRM printer to use
*
* Dump the table content using printk.
*/
static void amdgpu_vram_mgr_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
struct amdgpu_vram_mgr *mgr = to_vram_mgr(man);
spin_lock(&mgr->lock);
drm_mm_print(&mgr->mm, printer);
spin_unlock(&mgr->lock);
drm_printf(printer, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
man->size, amdgpu_vram_mgr_usage(man) >> 20,
amdgpu_vram_mgr_vis_usage(man) >> 20);
}
static const struct ttm_resource_manager_func amdgpu_vram_mgr_func = {
.alloc = amdgpu_vram_mgr_new,
.free = amdgpu_vram_mgr_del,
.debug = amdgpu_vram_mgr_debug
};
/**
* amdgpu_vram_mgr_init - init VRAM manager and DRM MM
*
* @adev: amdgpu_device pointer
*
* Allocate and initialize the VRAM manager.
*/
int amdgpu_vram_mgr_init(struct amdgpu_device *adev)
{
struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
struct ttm_resource_manager *man = &mgr->manager;
ttm_resource_manager_init(man, adev->gmc.real_vram_size >> PAGE_SHIFT);
man->func = &amdgpu_vram_mgr_func;
drm_mm_init(&mgr->mm, 0, man->size);
spin_lock_init(&mgr->lock);
INIT_LIST_HEAD(&mgr->reservations_pending);
INIT_LIST_HEAD(&mgr->reserved_pages);
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, &mgr->manager);
ttm_resource_manager_set_used(man, true);
return 0;
}
/**
* amdgpu_vram_mgr_fini - free and destroy VRAM manager
*
* @adev: amdgpu_device pointer
*
* Destroy and free the VRAM manager, returns -EBUSY if ranges are still
* allocated inside it.
*/
void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
{
struct amdgpu_vram_mgr *mgr = &adev->mman.vram_mgr;
struct ttm_resource_manager *man = &mgr->manager;
int ret;
struct amdgpu_vram_reservation *rsv, *temp;
ttm_resource_manager_set_used(man, false);
ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
if (ret)
return;
spin_lock(&mgr->lock);
list_for_each_entry_safe(rsv, temp, &mgr->reservations_pending, node)
kfree(rsv);
list_for_each_entry_safe(rsv, temp, &mgr->reserved_pages, node) {
drm_mm_remove_node(&rsv->mm_node);
kfree(rsv);
}
drm_mm_takedown(&mgr->mm);
spin_unlock(&mgr->lock);
ttm_resource_manager_cleanup(man);
ttm_set_driver_manager(&adev->mman.bdev, TTM_PL_VRAM, NULL);
}