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URL https://opencores.org/ocsvn/pcie_ds_dma/pcie_ds_dma/trunk

Subversion Repositories pcie_ds_dma

[/] [pcie_ds_dma/] [trunk/] [soft/] [linux/] [driver/] [pexdrv/] [memory.c] - Diff between revs 7 and 54

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Rev 7 Rev 54
Line 1... Line 1...
 
 
#include <linux/kernel.h>
#include <linux/kernel.h>
#define __NO_VERSION__
#include <linux/version.h>
#include <linux/module.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/pci.h>
#include <linux/pagemap.h>
#include <linux/pagemap.h>
#include <linux/interrupt.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/proc_fs.h>
 
#include <linux/sched.h>
 
 
#include <asm/io.h>
#include <asm/io.h>
 
 
#include "memory.h"
 
#include "pexmodule.h"
#include "pexmodule.h"
 
#include "memory.h"
 
 
//--------------------------------------------------------------------
//--------------------------------------------------------------------
 
 
int lock_pages( void *va, u32 size )
int lock_pages( void *va, u32 size )
{
{
    struct page *start_page_addr = virt_to_page(va);
    struct page *start_page_addr = virt_to_page(va);
    int i = 0;
    int i = 0;
 
 
    for (i=0; i < (size >> PAGE_CACHE_SHIFT); i++) {
    for (i=0; i < (size >> PAGE_SHIFT); i++) {
        SetPageReserved(start_page_addr+i);
        SetPageReserved(start_page_addr+i);
        //dbg_msg(dbg_trace, "%s(): page_addr[%d] = 0x%x\n", __FUNCTION__, i, (int)(start_page_addr+i));
        //dbg_msg(dbg_trace, "%s(): page_addr[%d] = 0x%x\n", __FUNCTION__, i, (int)(start_page_addr+i));
    }
    }
 
 
    return i;
    return i;
Line 33... Line 36...
int unlock_pages( void *va, u32 size )
int unlock_pages( void *va, u32 size )
{
{
    struct page *start_page_addr = virt_to_page(va);
    struct page *start_page_addr = virt_to_page(va);
    int i = 0;
    int i = 0;
 
 
    for (i=0; i < (size >> PAGE_CACHE_SHIFT); i++) {
    for (i=0; i < (size >> PAGE_SHIFT); i++) {
        ClearPageReserved(start_page_addr+i);
        ClearPageReserved(start_page_addr+i);
        //dbg_msg(dbg_trace, "%s(): page_addr[%d] = 0x%x\n", __FUNCTION__, i, (int)(start_page_addr+i));
        //dbg_msg(dbg_trace, "%s(): page_addr[%d] = 0x%x\n", __FUNCTION__, i, (int)(start_page_addr+i));
    }
    }
 
 
    return i;
    return i;
}
}
 
 
//--------------------------------------------------------------------
//--------------------------------------------------------------------
 
 
 
int check_address( void *pMemUserAddr )
 
{
 
        size_t addr = (size_t)pMemUserAddr;
 
        size_t mask = (size_t)~PAGE_MASK;
 
 
 
        printk("%s()\n", __FUNCTION__);
 
 
 
        // адрес пользовательского буфера должен быть выровнен на страницу
 
        if(addr & mask) {
 
            printk("%s(): %p - Error! Address must be aling at PAGE_SIZE border\n", __FUNCTION__, pMemUserAddr );
 
            return 1;
 
        }
 
 
 
        return 0;
 
    }
 
 
 
//--------------------------------------------------------------------
 
 
 
int check_size( size_t userSize )
 
{
 
        printk("%s()\n", __FUNCTION__);
 
 
 
        // размер пользовательского буфера должен быть кратен размеру страницы
 
        if((userSize % PAGE_SIZE) != 0) {
 
            printk("%s(): Invalid user memory block size - 0x%lX.\n", __FUNCTION__, userSize);
 
            return 1;
 
        }
 
 
 
        return 0;
 
}
 
 
 
//--------------------------------------------------------------------
 
 
 
int lock_user_memory( SHARED_MEMORY_DESCRIPTION *MemDscr, void* userSpaceAddress, size_t userSpaceSize )
 
{
 
        int i = 0;
 
        int requested_page_count = 0;
 
        int allocated_page_count = 0;
 
 
 
        printk("%s()\n", __FUNCTION__);
 
 
 
        if(!MemDscr) {
 
            printk("%s(): Invalid memory descriptor.\n", __FUNCTION__);
 
            return -EINVAL;
 
        }
 
 
 
        requested_page_count = (userSpaceSize >> PAGE_SHIFT);
 
 
 
        MemDscr->LockedPages = (struct page**)kmalloc(requested_page_count*sizeof(struct page*), GFP_KERNEL);
 
        if(!MemDscr->LockedPages) {
 
            printk("%s(): Cant allocate memory for locked pages pointers.\n", __FUNCTION__);
 
            return -ENOMEM;
 
        }
 
 
 
        memset(MemDscr->LockedPages,0,requested_page_count*sizeof(struct page*));
 
 
 
        down_read(&current->mm->mmap_sem);
 
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
 
        allocated_page_count = get_user_pages(current,
 
                                          current->mm,
 
                                          (size_t)userSpaceAddress,
 
                                          requested_page_count,
 
                                          1,
 
                                          0,
 
                                          MemDscr->LockedPages,
 
                                          0);
 
#endif
 
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,5,0)) && (LINUX_VERSION_CODE < KERNEL_VERSION(4,9,0))
 
        allocated_page_count = get_user_pages((size_t)userSpaceAddress,
 
                                          requested_page_count,
 
                                          1,
 
                                          0,
 
                                          MemDscr->LockedPages,
 
                                          0);
 
#endif
 
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,9,0))
 
        allocated_page_count = get_user_pages((size_t)userSpaceAddress,
 
                                          requested_page_count,
 
                                          1,
 
                                          MemDscr->LockedPages,
 
                                          0);
 
#endif
 
 
 
        up_read(&current->mm->mmap_sem);
 
 
 
        // если все ok то result содержит число страниц в массиве struct page *pages
 
        if(MemDscr->PageCount <= 0) {
 
            printk("%s(): Error to lock memory pages.\n", __FUNCTION__);
 
            kfree(MemDscr->LockedPages);
 
            MemDscr->LockedPages = NULL;
 
            MemDscr->PageCount = 0;
 
            return -ENOMEM;
 
        }
 
 
 
        printk("%s(): MemDscr->PageCount = %ld\n", __FUNCTION__, MemDscr->PageCount);
 
        printk("%s(): MemDscr->LockedPages = %p\n", __FUNCTION__, MemDscr->LockedPages);
 
 
 
        for(i=0; i<MemDscr->PageCount; i++) {
 
 
 
            printk("%s(): LockedPages[%d] = %p\n", __FUNCTION__, i, MemDscr->LockedPages[i]);
 
            printk("%s(): PhysicalAddress = %p\n", __FUNCTION__, (void*)page_to_phys(MemDscr->LockedPages[i]));
 
 
 
            if(!PageReserved(MemDscr->LockedPages[i])) {
 
                SetPageReserved(MemDscr->LockedPages[i]);
 
            }
 
        }
 
 
 
        printk("%s(): Lock %ld memory pages\n", __FUNCTION__, MemDscr->PageCount);
 
 
 
        return 0;
 
}
 
 
//--------------------------------------------------------------------
//--------------------------------------------------------------------
/*
 
static int copy_memory_descriptors(unsigned long arg, struct memory_descriptor *md, struct memory_block **mb)
int unlock_user_memory( SHARED_MEMORY_DESCRIPTION *MemDscr )
{
{
    struct memory_block *mblocks = NULL;
        int i = 0;
    int error = 0;
 
    //int i = 0;
        printk("%s()\n", __FUNCTION__);
 
 
    if(copy_from_user((void*)md, (void*)arg, sizeof(struct memory_descriptor))) {
        if(!MemDscr) {
        err_msg(err_trace, "%s(): Error copy memory descriptor from user space\n", __FUNCTION__);
            printk("%s(): Invalid parameter MemDscr = %p\n", __FUNCTION__, MemDscr);
        error = -EINVAL;
            return -EINVAL;
        goto do_exit;
        }
    }
 
 
        printk("%s(): MemDscr = %p\n", __FUNCTION__, MemDscr);
    dbg_msg(dbg_trace, "%s(): md.total_blocks = %zd\n", __FUNCTION__, md->total_blocks );
 
    dbg_msg(dbg_trace, "%s(): md.blocks = %p\n", __FUNCTION__, md->blocks );
        if(MemDscr->LockedPages)
 
            printk("%s(): MemDscr->LockedPages = %p\n", __FUNCTION__, MemDscr->LockedPages);
    mblocks = kzalloc(md->total_blocks*sizeof(struct memory_block), GFP_KERNEL);
 
    if(!mblocks) {
        for(i=0; i<MemDscr->PageCount; i++) {
        err_msg(err_trace, "%s(): Error allocate memory for memory descriptors\n", __FUNCTION__);
            if(MemDscr->LockedPages[i]) {
        error = -ENOMEM;
                ClearPageReserved(MemDscr->LockedPages[i]);
        goto do_exit;
                //page_cache_release(MemDscr->LockedPages[i]);
    }
                printk("%s(): Unlock page %p\n", __FUNCTION__, MemDscr->LockedPages[i]);
 
 
    if(copy_from_user((void*)mblocks, (void*)md->blocks, md->total_blocks*sizeof(struct memory_block))) {
 
        err_msg(err_trace, "%s(): Error copy memory blocks from user space\n", __FUNCTION__);
 
        error = -EINVAL;
 
        goto do_free_mem;
 
    }
 
 
 
    //for(i=0; i<md->total_blocks; i++) {
 
    //    dbg_msg(dbg_trace, "%s(): mb[%d].size = 0x%x\n", __FUNCTION__, i, mblocks[i].size );
 
    //}
 
 
 
    *mb = mblocks;
 
 
 
    return 0;
 
 
 
do_free_mem:
 
    kfree(mb);
 
 
 
do_exit:
 
    return error;
 
}
 
*/
 
//-----------------------------------------------------------------------------
 
 
 
int lock_user_pages(unsigned long addr, int size)
 
{
 
    //int res = 0;
 
    //res = get_user_pages(current, current->mm, unsigned long start, int nr_pages, int write, int force,
 
    //                     struct page **pages, struct vm_area_struct **vmas);
 
    return -1;
 
}
}
 
        }
 
 
 
        if(MemDscr->LockedPages)
 
            kfree(MemDscr->LockedPages);
 
 
//-----------------------------------------------------------------------------
        return 0;
 
}
 
 
 
//--------------------------------------------------------------------
 
 
void* allocate_memory_block(struct pex_device *brd, size_t block_size, dma_addr_t *dma_addr)
void* allocate_memory_block(struct pex_device *brd, size_t block_size, dma_addr_t *dma_addr)
{
{
    struct mem_t *m = NULL;
    struct mem_t *m = NULL;
    void *cpu_addr = NULL;
    void *cpu_addr = NULL;

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