ExternalVendorCode/genode
1
0
Fork 0
mirror of https://github.com/genodelabs/genode.git synced 2025-01-30 16:14:13 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

lx_emul: manage page structs per buffer range

Browse Source 
The management of Linux page structs is now tied to the life time of DMA
buffers. Thus, page structs are created when a buffer is allocated and
deallocated only when a buffer is freed - not on lx_emul_mem_free()
because DMA buffers are cached. Page struct refcounting was entirely
reworked in lx_emul/shadow/mm/page_alloc.c.

Fixes #4809
This commit is contained in:
Christian Helmuth 2023-08-21 14:28:22 +02:00 committed by Norman Feske
parent 73bf682b62
commit 1e7116fcc1
25 changed files with 310 additions and 335 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
repos/dde_linux/lib/import/import-lx_emul_common.inc
View File

@ -146,7 +146,7 @@ CC_C_OPT += -Wno-restrict -Wno-maybe-uninitialized -Werror=date-time
CC_C_OPT += -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 -Werror=date-time
CC_C_OPT += -Werror=incompatible-pointer-types -Werror=designated-init
CC_C_OPT += -Wno-packed-not-aligned -Wno-unused-but-set-variable
CC_C_OPT += -Wno-discarded-qualifiers
CC_C_OPT += -Wno-discarded-qualifiers -Wno-unused-function
# avoid build errors because with CC_OLEVEL = -O0/-Og - not supported by Linux
override CC_OLEVEL := -O2

21
repos/dde_linux/src/include/lx_emul/page_virt.h
View File

@ -1,6 +1,7 @@
/*
* \brief Lx_emul support for page-struct management
* \author Norman Feske
* \author Christian Helmuth
* \date 2021-07-01
*/
@ -27,29 +28,27 @@ struct page;
void lx_emul_associate_page_with_virt_addr(struct page *, void const *virt);
void lx_emul_disassociate_page_from_virt_addr(void const *virt);
struct page *lx_emul_associated_page(void const *virt, unsigned long size);
struct page *lx_emul_associated_page(void const *virt);
/**
* Return page struct for the page at a given virtual address
* Return page struct for the page at a given virtual address (virt_to_page.cc)
*
* If no page struct exists for the virtual address, it is created.
* As in Linux page structs of contiguous pages of attached DMA/RAM buffers
* (i.e., page ranges) are contiguous too.
*/
struct page *lx_emul_virt_to_pages(void const *virt, unsigned long num);
struct page *lx_emul_virt_to_page(void const *virt);
/**
* Release page structs for specified virtual-address range
*
* \param size size of range in bytes
* Release page structs for specified virtual-address range (virt_to_page.c)
*/
void lx_emul_forget_pages(void const *virt, unsigned long size);
void lx_emul_remove_page_range(void const *virt_addr, unsigned long size);
/**
* Perform unit test
* Initialize page structs for specified virtual-address range (virt_to_page.c)
*/
void lx_emul_associate_page_selftest(void);
void lx_emul_add_page_range(void const *virt_addr, unsigned long size);
#ifdef __cplusplus

2
repos/dde_linux/src/include/lx_emul/shadow/arch/arm/include/asm/page.h
View File

@ -50,7 +50,7 @@ typedef struct page *pgtable_t;
#define page_to_phys(p) __pa((p)->virtual)
#define page_to_virt(p) ((p)->virtual)
static inline struct page *virt_to_page(void const *v) { return lx_emul_virt_to_pages(v, 1U); }
static inline struct page *virt_to_page(void const *v) { return lx_emul_virt_to_page(v); }
/* needed by mm/internal.h */
#define pfn_valid(pfn) (pfn != 0UL)

2
repos/dde_linux/src/include/lx_emul/shadow/arch/arm64/include/asm/memory.h
View File

@ -53,7 +53,7 @@ extern u64 vabits_actual;
#define page_to_phys(p) __pa((p)->virtual)
#define page_to_virt(p) ((p)->virtual)
static inline struct page *virt_to_page(void const *v) { return lx_emul_virt_to_pages(v, 1U); }
static inline struct page *virt_to_page(void const *v) { return lx_emul_virt_to_page(v); }
#define pfn_to_page(pfn) ( (struct page *)(__va(pfn << PAGE_SHIFT)) )
#define page_to_pfn(page) ( page_to_phys(page) >> PAGE_SHIFT )

2
repos/dde_linux/src/include/lx_emul/shadow/arch/x86/include/asm/page.h
View File

@ -61,7 +61,7 @@ typedef struct page *pgtable_t;
#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
static inline struct page *virt_to_page(void const *v) { return lx_emul_virt_to_pages(v, 1U); }
static inline struct page *virt_to_page(void const *v) { return lx_emul_virt_to_page(v); }
#define page_to_virt(p) ((p)->virtual)
#define virt_addr_valid(kaddr) ((unsigned long)kaddr != 0UL)

2
repos/dde_linux/src/include/lx_emul/shared_dma_buffer.h
View File

@ -25,6 +25,8 @@ lx_emul_shared_dma_buffer_allocate(unsigned long size);
void lx_emul_shared_dma_buffer_free(struct genode_shared_dataspace * ds);
void * lx_emul_shared_dma_buffer_virt_addr(struct genode_shared_dataspace * ds);
#ifdef __cplusplus
}
#endif

153
repos/dde_linux/src/include/lx_emul/shmem_file.h Normal file
View File

@ -0,0 +1,153 @@
/*
* \brief Shared-memory file utility
* \author Christian Helmuth
* \author Josef Söntgen
* \date 2023-12-04
*
* This utility implements limited shared-memory file semantics as required by
* Linux graphics drivers (e.g., intel_fb and lima_gpu_drv)
*/
/*
* Copyright (C) 2023 Genode Labs GmbH
*
* This file is distributed under the terms of the GNU General Public License
* version 2.
*/
#include <lx_emul/shared_dma_buffer.h>
#include <linux/shmem_fs.h>
struct shmem_file_buffer
{
struct genode_shared_dataspace *dataspace;
void *addr;
struct page *pages;
};
struct file *shmem_file_setup(char const *name, loff_t size,
unsigned long flags)
{
struct file *f;
struct inode *inode;
struct address_space *mapping;
struct shmem_file_buffer *private_data;
loff_t const nrpages = DIV_ROUND_UP(size, PAGE_SIZE);
if (!size)
return (struct file*)ERR_PTR(-EINVAL);
f = kzalloc(sizeof (struct file), 0);
if (!f) {
return (struct file*)ERR_PTR(-ENOMEM);
}
inode = kzalloc(sizeof (struct inode), 0);
if (!inode) {
goto err_inode;
}
mapping = kzalloc(sizeof (struct address_space), 0);
if (!mapping) {
goto err_mapping;
}
private_data = kzalloc(sizeof (struct shmem_file_buffer), 0);
if (!private_data) {
goto err_private_data;
}
private_data->dataspace = lx_emul_shared_dma_buffer_allocate(nrpages * PAGE_SIZE);
if (!private_data->dataspace)
goto err_private_data_addr;
private_data->addr = lx_emul_shared_dma_buffer_virt_addr(private_data->dataspace);
private_data->pages = lx_emul_virt_to_page(private_data->addr);
mapping->private_data = private_data;
mapping->nrpages = nrpages;
inode->i_mapping = mapping;
atomic_long_set(&f->f_count, 1);
f->f_inode = inode;
f->f_mapping = mapping;
f->f_flags = flags;
f->f_mode = OPEN_FMODE(flags);
f->f_mode |= FMODE_OPENED;
return f;
err_private_data_addr:
kfree(private_data);
err_private_data:
kfree(mapping);
err_mapping:
kfree(inode);
err_inode:
kfree(f);
return (struct file*)ERR_PTR(-ENOMEM);
}
struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
pgoff_t index, gfp_t gfp)
{
struct page *p;
struct shmem_file_buffer *private_data;
if (index > mapping->nrpages)
return NULL;
private_data = mapping->private_data;
p = private_data->pages;
return (p + index);
}
#include <linux/pagevec.h>
void __pagevec_release(struct pagevec * pvec)
{
/* XXX check if we have to call release_pages */
pagevec_reinit(pvec);
}
#include <linux/file.h>
static void _free_file(struct file *file)
{
struct inode *inode;
struct address_space *mapping;
struct shmem_file_buffer *private_data;
mapping = file->f_mapping;
inode = file->f_inode;
if (mapping) {
private_data = mapping->private_data;
lx_emul_shared_dma_buffer_free(private_data->dataspace);
kfree(private_data);
kfree(mapping);
}
kfree(inode);
kfree(file->f_path.dentry);
kfree(file);
}
void fput(struct file *file)
{
if (!file)
return;
if (atomic_long_sub_and_test(1, &file->f_count)) {
_free_file(file);
}
}

4
repos/dde_linux/src/include/lx_kit/memory.h
View File

@ -1,6 +1,7 @@
/*
* \brief Lx_kit memory allocation backend
* \author Stefan Kalkowski
* \author Christian Helmuth
* \date 2021-03-25
*/
@ -99,7 +100,8 @@ class Lx_kit::Mem_allocator
void free_buffer(void *addr);
Dataspace_capability attached_dataspace_cap(void *addr);
void * alloc(size_t size, size_t align);
void * alloc(size_t size, size_t align,
void (*new_range_cb)(void const *virt_addr, unsigned long size));
addr_t dma_addr(void * addr);
addr_t virt_addr(void * dma_addr);
addr_t virt_region_start(void * virt_addr);

8
repos/dde_linux/src/lib/lx_emul/alloc.cc
View File

@ -21,8 +21,7 @@
extern "C" void * lx_emul_mem_alloc_aligned(unsigned long size, unsigned long align)
{
void * const ptr = Lx_kit::env().memory.alloc(size, align);
lx_emul_forget_pages(ptr, size);
void * const ptr = Lx_kit::env().memory.alloc(size, align, &lx_emul_add_page_range);
return ptr;
};
@ -30,8 +29,7 @@ extern "C" void * lx_emul_mem_alloc_aligned(unsigned long size, unsigned long al
extern "C" void * lx_emul_mem_alloc_aligned_uncached(unsigned long size,
unsigned long align)
{
void * const ptr = Lx_kit::env().uncached_memory.alloc(size, align);
lx_emul_forget_pages(ptr, size);
void * const ptr = Lx_kit::env().uncached_memory.alloc(size, align, &lx_emul_add_page_range);
return ptr;
};
@ -53,7 +51,7 @@ extern "C" unsigned long lx_emul_mem_virt_addr(void * dma_addr)
if (ret)
return ret;
if (!(ret = Lx_kit::env().uncached_memory.virt_addr(dma_addr)))
Genode::error(__func__, " called with invalid addr ", dma_addr);
Genode::error(__func__, " called with invalid dma_addr ", dma_addr);
return ret;
}

17
repos/dde_linux/src/lib/lx_emul/page_virt.cc
View File

@ -1,6 +1,7 @@
/*
* \brief Lx_emul backend for page-struct management
* \author Norman Feske
* \author Christian Helmuth
* \date 2021-07-01
*/
@ -35,28 +36,22 @@ struct Lx_emul::Page_info
return key.virt > other_key.virt;
}
struct Query_virt_range
struct Query_virt_addr
{
addr_t virt;
size_t size;
bool matches(Page_info const &page_info) const
{
size_t const page_size = 4096;
Lx_kit::Byte_range page_range { page_info.key.virt, page_size };
Lx_kit::Byte_range virt_range { virt, size };
Lx_kit::Byte_range virt_range { virt, 1 };
return page_range.intersects(virt_range);
}
Key key() const { return Key { virt }; }
};
struct Query_virt_addr : Query_virt_range
{
Query_virt_addr(void const *virt) : Query_virt_range{(addr_t)virt, 1} { }
};
};
@ -75,13 +70,13 @@ extern "C" void lx_emul_associate_page_with_virt_addr(struct page *page, void co
void lx_emul_disassociate_page_from_virt_addr(void const *virt)
{
page_registry().remove(Lx_emul::Page_info::Query_virt_addr(virt));
page_registry().remove(Lx_emul::Page_info::Query_virt_addr { (addr_t)virt });
}
struct page *lx_emul_associated_page(void const *virt, unsigned long size)
struct page *lx_emul_associated_page(void const *virt)
{
Lx_emul::Page_info::Query_virt_range query { .virt = (addr_t)virt, .size = size };
Lx_emul::Page_info::Query_virt_addr query { (addr_t)virt };
struct page *page_ptr = nullptr;
page_registry().apply(query, [&] (Lx_emul::Page_info const &page_info) {

93
repos/dde_linux/src/lib/lx_emul/shadow/mm/page_alloc.c
View File

@ -1,6 +1,7 @@
/*
* \brief Replaces mm/page_alloc.c
* \author Stefan Kalkowski
* \author Christian Helmuth
* \date 2021-06-03
*/
@ -27,7 +28,7 @@ unsigned long __alloc_pages_bulk(gfp_t gfp,int preferred_nid,
{
void const *ptr = lx_emul_mem_alloc_aligned(PAGE_SIZE*nr_pages, PAGE_SIZE);
struct page *page = lx_emul_virt_to_pages(ptr, nr_pages);
struct page *page = lx_emul_virt_to_page(ptr);
int i;
for (i = 0; i < nr_pages; i++) {
@ -42,40 +43,38 @@ unsigned long __alloc_pages_bulk(gfp_t gfp,int preferred_nid,
return nr_pages;
}
static void lx_free_pages(struct page *page, unsigned const num_pages)
static void lx_free_pages(struct page *page, bool force)
{
unsigned i;
void * const virt_addr = page->virtual;
void * const virt_addr = page_address(page);
if (atomic_read(&page->_refcount) && !atomic_dec_and_test(&page->_refcount))
if (force)
set_page_count(page, 0);
else if (!put_page_testzero(page))
return;
for (i = 0; i < num_pages; i++)
lx_emul_disassociate_page_from_virt_addr(page[i].virtual);
lx_emul_mem_free(virt_addr);
lx_emul_mem_free(page);
}
void __free_pages(struct page * page, unsigned int order)
{
lx_free_pages(page, (1u << order));
lx_free_pages(page, false);
}
void free_pages_exact(void *virt_addr, size_t size)
void free_pages(unsigned long addr,unsigned int order)
{
lx_free_pages(virt_to_page(virt_addr), PAGE_ALIGN(size) / PAGE_SIZE);
if (addr != 0ul)
__free_pages(virt_to_page((void *)addr), order);
}
static struct page * lx_alloc_pages(unsigned const nr_pages)
{
void const *ptr = lx_emul_mem_alloc_aligned(PAGE_SIZE*nr_pages, PAGE_SIZE);
struct page *page = lx_emul_virt_to_pages(ptr, nr_pages);
struct page *page = lx_emul_virt_to_page(ptr);
atomic_set(&page->_refcount, 1);
init_page_count(page);
return page;
}
@ -84,26 +83,16 @@ static struct page * lx_alloc_pages(unsigned const nr_pages)
/*
* In earlier kernel versions, '__alloc_pages' was an inline function.
*/
#if LINUX_VERSION_CODE > KERNEL_VERSION(5,12,0)
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,13,0)
struct page * __alloc_pages_nodemask(gfp_t gfp, unsigned int order, int preferred_nid,
nodemask_t * nodemask)
#else
struct page * __alloc_pages(gfp_t gfp, unsigned int order, int preferred_nid,
nodemask_t * nodemask)
#endif
{
return lx_alloc_pages(1u << order);
}
#endif
void *alloc_pages_exact(size_t size, gfp_t gfp_mask)
{
return lx_alloc_pages(PAGE_ALIGN(size) / PAGE_SIZE)->virtual;
}
void free_pages(unsigned long addr,unsigned int order)
{
if (addr != 0ul)
__free_pages(virt_to_page((void *)addr), order);
}
unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order)
@ -115,3 +104,49 @@ unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order)
return (unsigned long)page_address(page);
}
/*
* Exact page allocation
*
* This implementation does only support alloc-free pairs that use the same
* size and does not set the page_count of pages beyond the head page. It is
* currently not possible to allocate individual but contiguous pages, which is
* required to satisfy Linux semantics.
*/
void free_pages_exact(void *virt_addr, size_t size)
{
struct page *page = lx_emul_virt_to_page(virt_addr);
if (!page)
return;
lx_free_pages(page, false);
}
void *alloc_pages_exact(size_t size, gfp_t gfp_mask)
{
size_t const nr_pages = DIV_ROUND_UP(size, PAGE_SIZE);
struct page *page = lx_alloc_pages(nr_pages);
if (!page)
return NULL;
return page_address(page);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6,0,0)
void __folio_put(struct folio * folio)
{
struct page *page = folio_page(folio, 0);
/* should only be called if refcount is 0 */
if (page_count(page) != 0)
printk("%s: page refocunt not 0 for page=%px\n", __func__, page);
lx_free_pages(&folio->page, true);
}
#endif

16
repos/dde_linux/src/lib/lx_emul/shared_dma_buffer.cc
View File

@ -1,6 +1,7 @@
/*
* \brief Lx_emul backend for shared dma buffers
* \author Stefan Kalkowski
* \author Christian Helmuth
* \date 2022-03-02
*/
@ -24,11 +25,8 @@ lx_emul_shared_dma_buffer_allocate(unsigned long size)
{
Lx_kit::Mem_allocator::Buffer & b = Lx_kit::env().memory.alloc_buffer(size);
/*
* We have to call virt_to_pages eagerly here,
* to get contingous page objects registered
*/
lx_emul_virt_to_pages((void*)b.virt_addr(), size >> 12);
lx_emul_add_page_range((void *)b.virt_addr(), b.size());
return static_cast<genode_shared_dataspace*>(&b);
}
@ -36,10 +34,16 @@ lx_emul_shared_dma_buffer_allocate(unsigned long size)
extern "C" void
lx_emul_shared_dma_buffer_free(struct genode_shared_dataspace * ds)
{
lx_emul_forget_pages((void*)ds->virt_addr(), ds->size());
lx_emul_remove_page_range((void *)ds->virt_addr(), ds->size());
Lx_kit::env().memory.free_buffer((void*)ds->virt_addr());
}
extern "C" void *
lx_emul_shared_dma_buffer_virt_addr(struct genode_shared_dataspace * ds)
{
return (void *)ds->virt_addr();
}
Genode::addr_t
genode_shared_dataspace_local_address(struct genode_shared_dataspace * ds)

6
repos/dde_linux/src/lib/lx_emul/start.c
View File

@ -50,6 +50,9 @@ static int kernel_init(void * args)
struct task_struct *tsk = current;
set_task_comm(tsk, "init");
/* setup page struct for zero page in BSS */
lx_emul_add_page_range(empty_zero_page, PAGE_SIZE);
wait_for_completion(&kthreadd_done);
workqueue_init();
@ -119,9 +122,6 @@ int lx_emul_init_task_function(void * dtb)
static struct pt_regs regs;
set_irq_regs(&regs);
/* Run emulation library self-tests before starting kernel */
lx_emul_associate_page_selftest();
/**
* Here we do the minimum normally done start_kernel() of init/main.c
*/

96
repos/dde_linux/src/lib/lx_emul/virt_to_page.c
View File

@ -1,6 +1,7 @@
/*
* \brief Linux DDE virt-to-page implementation
* \author Norman Feske
* \author Christian Helmuth
* \date 2021-07-02
*/
@ -17,78 +18,49 @@
#include <lx_emul/page_virt.h>
struct page *lx_emul_virt_to_pages(void const *virt, unsigned long count)
struct page *lx_emul_virt_to_page(void const *virt)
{
/* sanitize argument */
void * const page_aligned_virt = (void *)((uintptr_t)virt & PAGE_MASK);
struct page *page = lx_emul_associated_page(page_aligned_virt, 1);
if (!page) {
unsigned long i;
struct page * p = kzalloc(sizeof(struct page)*count, 0);
page = p;
for (i = 0; i < count; i++, p++) {
p->virtual = (void*)((uintptr_t)page_aligned_virt + i*PAGE_SIZE);
init_page_count(p);
lx_emul_associate_page_with_virt_addr(p, p->virtual);
}
}
/* consistency check */
if (page_aligned_virt != page->virtual)
BUG();
struct page * const page = lx_emul_associated_page(page_aligned_virt);
return page;
}
void lx_emul_forget_pages(void const *virt, unsigned long size)
void lx_emul_remove_page_range(void const *virt_addr, unsigned long size)
{
for (;;) {
struct page *page = lx_emul_associated_page(virt, size);
if (!page)
return;
unsigned i;
struct page *p;
lx_emul_disassociate_page_from_virt_addr(page->virtual);
kfree(page);
unsigned const nr_pages = DIV_ROUND_UP(size, PAGE_SIZE);
/* sanitize argument */
void * const page_aligned_virt = (void *)((uintptr_t)virt_addr & PAGE_MASK);
struct page * const page = lx_emul_associated_page(page_aligned_virt);
for (i = 0, p = page; i < nr_pages; i++, p++)
lx_emul_disassociate_page_from_virt_addr(p->virtual);
lx_emul_heap_free(page);
}
void lx_emul_add_page_range(void const *virt_addr, unsigned long size)
{
unsigned i;
struct page *p;
/* range may comprise a partial page at the end that needs a page struct too */
unsigned const nr_pages = DIV_ROUND_UP(size, PAGE_SIZE);
unsigned const space = sizeof(struct page)*nr_pages;
struct page * const page = lx_emul_heap_alloc(space);
for (i = 0, p = page; i < nr_pages; i++, p++) {
p->virtual = (void *)((uintptr_t)virt_addr + i*PAGE_SIZE);
set_page_count(p, 0);
lx_emul_associate_page_with_virt_addr(p, p->virtual);
}
}
#define LX_EMUL_ASSERT(cond) { if (!(cond)) {\
printk("assertion failed at line %d: %s\n", __LINE__, #cond); \
lx_emul_trace_and_stop("abort"); } }
void lx_emul_associate_page_selftest()
{
struct page *p1 = (struct page *)1;
struct page *p2 = (struct page *)2;
struct page *p3 = (struct page *)3;
void *v1 = (void *)0x11000;
void *v2 = (void *)0x12000;
void *v3 = (void *)0x13000;
lx_emul_associate_page_with_virt_addr(p1, v1);
lx_emul_associate_page_with_virt_addr(p2, v2);
lx_emul_associate_page_with_virt_addr(p3, v3);
LX_EMUL_ASSERT(lx_emul_associated_page(v1, 1) == p1);
LX_EMUL_ASSERT(lx_emul_associated_page(v2, 1) == p2);
LX_EMUL_ASSERT(lx_emul_associated_page(v3, 1) == p3);
LX_EMUL_ASSERT(lx_emul_associated_page((void *)((uintptr_t)v1 + 4095), 1) == p1);
LX_EMUL_ASSERT(lx_emul_associated_page((void *)((uintptr_t)v1 - 1), 1) == NULL);
LX_EMUL_ASSERT(lx_emul_associated_page((void *)((uintptr_t)v2 & PAGE_MASK), 1) == p2);
LX_EMUL_ASSERT(lx_emul_associated_page((void *)0x10000, 0x10000) == p2);
lx_emul_disassociate_page_from_virt_addr(v2);
LX_EMUL_ASSERT(lx_emul_associated_page((void *)0x10000, 0x10000) == p3);
lx_emul_disassociate_page_from_virt_addr(v3);
LX_EMUL_ASSERT(lx_emul_associated_page((void *)0x10000, 0x10000) == p1);
lx_emul_disassociate_page_from_virt_addr(v1);
LX_EMUL_ASSERT(lx_emul_associated_page((void *)0x10000, 0x10000) == NULL);
}

11
repos/dde_linux/src/lib/lx_kit/memory.cc
View File

@ -1,6 +1,7 @@
/*
* \brief Lx_kit memory allocation backend
* \author Stefan Kalkowski
* \author Christian Helmuth
* \date 2021-03-25
*/
@ -57,7 +58,8 @@ Genode::Dataspace_capability Lx_kit::Mem_allocator::attached_dataspace_cap(void
}
void * Lx_kit::Mem_allocator::alloc(size_t const size, size_t const align)
void * Lx_kit::Mem_allocator::alloc(size_t const size, size_t const align,
void (*new_range_cb)(void const *, unsigned long))
{
if (!size)
return nullptr;
@ -93,7 +95,7 @@ void * Lx_kit::Mem_allocator::alloc(size_t const size, size_t const align)
_mem.add_range(buffer.virt_addr(), buffer.size() - 1);
/* re-try allocation */
return _mem.alloc_aligned(size, (unsigned)log2(align)).convert<void *>(
void * const virt_addr = _mem.alloc_aligned(size, (unsigned)log2(align)).convert<void *>(
[&] (void *ptr) { return cleared_allocation(ptr, size); },
@ -101,6 +103,11 @@ void * Lx_kit::Mem_allocator::alloc(size_t const size, size_t const align)
error("memory allocation failed for ", size, " align ", align);
return nullptr; }
);
if (virt_addr)
new_range_cb((void *)buffer.virt_addr(), buffer.size() - 1);
return virt_addr;
}
);
}

4
repos/dde_linux/src/lib/lx_kit/memory_non_dma.cc
View File

@ -27,7 +27,9 @@ class Non_dma_buffer : Attached_ram_dataspace,
using Attached_ram_dataspace::Attached_ram_dataspace;
size_t dma_addr() const override { return 0UL; }
/* emulate idempotent virt-dma mapping */
size_t dma_addr() const override {
return (size_t) Attached_ram_dataspace::local_addr<void>(); }
size_t size() const override {
return Attached_ram_dataspace::size(); }

23
repos/dde_linux/src/lib/wifi/lx_emul.c
View File

@ -382,25 +382,6 @@ asmlinkage __visible void dump_stack(void)
}
#include <linux/mm.h>
void __put_page(struct page * page)
{
__free_pages(page, 0);
}
#if LINUX_VERSION_CODE > KERNEL_VERSION(6,1,0)
#include <linux/mm.h>
void __folio_put(struct folio * folio)
{
__free_pages(&folio->page, 0);
kfree(folio);
}
#endif
#include <linux/prandom.h>
void prandom_bytes(void *buf, size_t bytes)
@ -437,7 +418,7 @@ void *page_frag_alloc_align(struct page_frag_cache *nc,
printk("%s: alloc might leak memory: fragsz: %u PAGE_SIZE: %lu "
"order: %u page: %p addr: %p\n", __func__, fragsz, PAGE_SIZE, order, page, page->virtual);
return page->virtual;
return page_address(page);
}
@ -445,7 +426,7 @@ void *page_frag_alloc_align(struct page_frag_cache *nc,
void page_frag_free(void * addr)
{
struct page *page = lx_emul_virt_to_pages(addr, 1ul);
struct page *page = virt_to_page(addr);
if (!page) {
printk("BUG %s: page for addr: %p not found\n", __func__, addr);
lx_emul_backtrace();

16
repos/pc/src/drivers/framebuffer/intel/pc/emul.cc
View File

@ -18,22 +18,6 @@
#include "lx_emul.h"
void *emul_alloc_shmem_file_buffer(unsigned long size)
{
if (!size)
return nullptr;
auto &buffer = Lx_kit::env().memory.alloc_buffer(size);
return reinterpret_cast<void *>(buffer.virt_addr());
}
void emul_free_shmem_file_buffer(void *addr)
{
Lx_kit::env().memory.free_buffer(addr);
}
unsigned short emul_intel_gmch_control_reg()
{
using namespace Genode;

16
repos/pc/src/drivers/framebuffer/intel/pc/generated_dummies.c
View File

@ -28,14 +28,6 @@ int __cond_resched_lock(spinlock_t * lock)
struct cpumask __cpu_active_mask;
#include <linux/mm.h>
void __folio_put(struct folio * folio)
{
lx_emul_trace_and_stop(__func__);
}
extern void __i915_gpu_coredump_free(struct kref * error_ref);
void __i915_gpu_coredump_free(struct kref * error_ref)
{
@ -51,14 +43,6 @@ struct sock * __netlink_kernel_create(struct net * net,int unit,struct module *
}
#include <linux/pagevec.h>
void __pagevec_release(struct pagevec * pvec)
{
lx_emul_trace_and_stop(__func__);
}
#include <linux/printk.h>
void __printk_safe_enter(void)

127
repos/pc/src/drivers/framebuffer/intel/pc/lx_emul.c
View File

@ -14,6 +14,7 @@
#include <lx_emul.h>
#include <lx_emul/io_mem.h>
#include <lx_emul/page_virt.h>
#include <lx_emul/shmem_file.h>
#include <linux/dma-fence.h>
#include <linux/fs.h>
@ -77,132 +78,6 @@ pgprot_t pgprot_writecombine(pgprot_t prot)
}
/*
* shmem handling as done by Josef etnaviv
*/
#include <linux/shmem_fs.h>
struct shmem_file_buffer
{
void *addr;
struct page *pages;
};
struct file *shmem_file_setup(char const *name, loff_t size,
unsigned long flags)
{
struct file *f;
struct inode *inode;
struct address_space *mapping;
struct shmem_file_buffer *private_data;
loff_t const nrpages = (size / PAGE_SIZE) + ((size % (PAGE_SIZE)) ? 1 : 0);
if (!size)
return (struct file*)ERR_PTR(-EINVAL);
f = kzalloc(sizeof (struct file), 0);
if (!f) {
return (struct file*)ERR_PTR(-ENOMEM);
}
inode = kzalloc(sizeof (struct inode), 0);
if (!inode) {
goto err_inode;
}
mapping = kzalloc(sizeof (struct address_space), 0);
if (!mapping) {
goto err_mapping;
}
private_data = kzalloc(sizeof (struct shmem_file_buffer), 0);
if (!private_data) {
goto err_private_data;
}
private_data->addr = emul_alloc_shmem_file_buffer(nrpages * PAGE_SIZE);
if (!private_data->addr)
goto err_private_data_addr;
/*
* We call virt_to_pages eagerly here, to get continuous page
* objects registered in case one wants to use them immediately.
*/
private_data->pages =
lx_emul_virt_to_pages(private_data->addr, nrpages);
mapping->private_data = private_data;
mapping->nrpages = nrpages;
inode->i_mapping = mapping;
atomic_long_set(&f->f_count, 1);
f->f_inode = inode;
f->f_mapping = mapping;
f->f_flags = flags;
f->f_mode = OPEN_FMODE(flags);
f->f_mode |= FMODE_OPENED;
return f;
err_private_data_addr:
kfree(private_data);
err_private_data:
kfree(mapping);
err_mapping:
kfree(inode);
err_inode:
kfree(f);
return (struct file*)ERR_PTR(-ENOMEM);
}
static void _free_file(struct file *file)
{
struct inode *inode;
struct address_space *mapping;
struct shmem_file_buffer *private_data;
mapping = file->f_mapping;
inode = file->f_inode;
private_data = mapping->private_data;
lx_emul_forget_pages(private_data->addr, mapping->nrpages << 12);
emul_free_shmem_file_buffer(private_data->addr);
kfree(private_data);
kfree(mapping);
kfree(inode);
kfree(file->f_path.dentry);
kfree(file);
}
void fput(struct file *file)
{
if (atomic_long_sub_and_test(1, &file->f_count)) {
_free_file(file);
}
}
struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
pgoff_t index, gfp_t gfp)
{
struct page *p;
struct shmem_file_buffer *private_data;
if (index > mapping->nrpages)
return NULL;
private_data = mapping->private_data;
p = private_data->pages;
return (p + index);
}
extern int intel_root_gt_init_early(struct drm_i915_private * i915);
int intel_root_gt_init_early(struct drm_i915_private * i915)
{

3
repos/pc/src/drivers/framebuffer/intel/pc/lx_emul.h
View File

@ -26,9 +26,6 @@ extern "C" {
struct dma_fence_work;
struct dma_fence_work_ops;
void *emul_alloc_shmem_file_buffer(unsigned long);
void emul_free_shmem_file_buffer(void *);
void * intel_io_mem_map(unsigned long offset, unsigned long size);
#include "lx_i915.h"

1
repos/pc/src/drivers/framebuffer/intel/pc/target.inc
View File

@ -10,6 +10,7 @@ INC_DIR += $(REL_PRG_DIR)
SRC_CC += main.cc
SRC_CC += emul.cc
SRC_CC += opregion_io_mem.cc
SRC_CC += lx_emul/shared_dma_buffer.cc
SRC_C += dummies.c
SRC_C += pci.c
SRC_C += lx_emul.c

2
repos/pc/src/drivers/nic/pc/lx_emul.c
View File

@ -63,7 +63,7 @@ void * page_frag_alloc_align(struct page_frag_cache *nc,
void page_frag_free(void * addr)
{
struct page *page = lx_emul_virt_to_pages(addr, 1ul);
struct page *page = lx_emul_virt_to_page(addr);
if (!page) {
printk("BUG %s: page for addr: %p not found\n", __func__, addr);
lx_emul_backtrace();

8
repos/pc/src/drivers/nic/pc/spec/x86_32/generated_dummies.c
View File

@ -28,14 +28,6 @@ int __ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_kse
}
#include <linux/mm.h>
void __folio_put(struct folio * folio)
{
lx_emul_trace_and_stop(__func__);
}
#include <net/netlink.h>
int __nla_parse(struct nlattr ** tb,int maxtype,const struct nlattr * head,int len,const struct nla_policy * policy,unsigned int validate,struct netlink_ext_ack * extack)

10
repos/pc/src/drivers/nic/pc/spec/x86_64/generated_dummies.c
View File

@ -1,7 +1,7 @@
/*
* \brief Dummy definitions of Linux Kernel functions
* \author Automatically generated file - do no edit
* \date 2023-11-02
* \date 2023-11-21
*/
#include <lx_emul.h>
@ -28,14 +28,6 @@ int __ethtool_get_link_ksettings(struct net_device * dev,struct ethtool_link_kse
}
#include <linux/mm.h>
void __folio_put(struct folio * folio)
{
lx_emul_trace_and_stop(__func__);
}
#include <net/netlink.h>
int __nla_parse(struct nlattr ** tb,int maxtype,const struct nlattr * head,int len,const struct nla_policy * policy,unsigned int validate,struct netlink_ext_ack * extack)