aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/samsung/ump/linux/ump_osk_low_level_mem.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/samsung/ump/linux/ump_osk_low_level_mem.c')
-rw-r--r--drivers/media/video/samsung/ump/linux/ump_osk_low_level_mem.c485
1 files changed, 0 insertions, 485 deletions
diff --git a/drivers/media/video/samsung/ump/linux/ump_osk_low_level_mem.c b/drivers/media/video/samsung/ump/linux/ump_osk_low_level_mem.c
deleted file mode 100644
index 8ae169a..0000000
--- a/drivers/media/video/samsung/ump/linux/ump_osk_low_level_mem.c
+++ /dev/null
@@ -1,485 +0,0 @@
-/*
- * Copyright (C) 2010-2012 ARM Limited. All rights reserved.
- *
- * This program is free software and is provided to you under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
- *
- * A copy of the licence is included with the program, and can also be obtained from Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
-
-/**
- * @file ump_osk_memory.c
- * Implementation of the OS abstraction layer for the kernel device driver
- */
-
-/* needed to detect kernel version specific code */
-#include <linux/version.h>
-
-#include "ump_osk.h"
-#include "ump_uk_types.h"
-#include "ump_ukk.h"
-#include "ump_kernel_common.h"
-#include <linux/module.h> /* kernel module definitions */
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-
-#include <asm/memory.h>
-#include <asm/uaccess.h> /* to verify pointers from user space */
-#include <asm/cacheflush.h>
-#include <linux/dma-mapping.h>
-
-typedef struct ump_vma_usage_tracker
-{
- atomic_t references;
- ump_memory_allocation *descriptor;
-} ump_vma_usage_tracker;
-
-static void ump_vma_open(struct vm_area_struct * vma);
-static void ump_vma_close(struct vm_area_struct * vma);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
-static int ump_cpu_page_fault_handler(struct vm_area_struct *vma, struct vm_fault *vmf);
-#else
-static unsigned long ump_cpu_page_fault_handler(struct vm_area_struct * vma, unsigned long address);
-#endif
-
-static struct vm_operations_struct ump_vm_ops =
-{
- .open = ump_vma_open,
- .close = ump_vma_close,
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
- .fault = ump_cpu_page_fault_handler
-#else
- .nopfn = ump_cpu_page_fault_handler
-#endif
-};
-
-/*
- * Page fault for VMA region
- * This should never happen since we always map in the entire virtual memory range.
- */
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
-static int ump_cpu_page_fault_handler(struct vm_area_struct *vma, struct vm_fault *vmf)
-#else
-static unsigned long ump_cpu_page_fault_handler(struct vm_area_struct * vma, unsigned long address)
-#endif
-{
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
- void __user * address;
- address = vmf->virtual_address;
-#endif
- MSG_ERR(("Page-fault in UMP memory region caused by the CPU\n"));
- MSG_ERR(("VMA: 0x%08lx, virtual address: 0x%08lx\n", (unsigned long)vma, address));
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26)
- return VM_FAULT_SIGBUS;
-#else
- return NOPFN_SIGBUS;
-#endif
-}
-
-static void ump_vma_open(struct vm_area_struct * vma)
-{
- ump_vma_usage_tracker * vma_usage_tracker;
- int new_val;
-
- vma_usage_tracker = (ump_vma_usage_tracker*)vma->vm_private_data;
- BUG_ON(NULL == vma_usage_tracker);
-
- new_val = atomic_inc_return(&vma_usage_tracker->references);
-
- DBG_MSG(4, ("VMA open, VMA reference count incremented. VMA: 0x%08lx, reference count: %d\n", (unsigned long)vma, new_val));
-}
-
-static void ump_vma_close(struct vm_area_struct * vma)
-{
- ump_vma_usage_tracker * vma_usage_tracker;
- _ump_uk_unmap_mem_s args;
- int new_val;
-
- vma_usage_tracker = (ump_vma_usage_tracker*)vma->vm_private_data;
- BUG_ON(NULL == vma_usage_tracker);
-
- new_val = atomic_dec_return(&vma_usage_tracker->references);
-
- DBG_MSG(4, ("VMA close, VMA reference count decremented. VMA: 0x%08lx, reference count: %d\n", (unsigned long)vma, new_val));
-
- if (0 == new_val)
- {
- ump_memory_allocation * descriptor;
-
- descriptor = vma_usage_tracker->descriptor;
-
- args.ctx = descriptor->ump_session;
- args.cookie = descriptor->cookie;
- args.mapping = descriptor->mapping;
- args.size = descriptor->size;
-
- args._ukk_private = NULL; /** @note unused */
-
- DBG_MSG(4, ("No more VMA references left, releasing UMP memory\n"));
- _ump_ukk_unmap_mem( & args );
-
- /* vma_usage_tracker is free()d by _ump_osk_mem_mapregion_term() */
- }
-}
-
-_mali_osk_errcode_t _ump_osk_mem_mapregion_init( ump_memory_allocation * descriptor )
-{
- ump_vma_usage_tracker * vma_usage_tracker;
- struct vm_area_struct *vma;
-
- if (NULL == descriptor) return _MALI_OSK_ERR_FAULT;
-
- vma_usage_tracker = kmalloc(sizeof(ump_vma_usage_tracker), GFP_KERNEL);
- if (NULL == vma_usage_tracker)
- {
- DBG_MSG(1, ("Failed to allocate memory for ump_vma_usage_tracker in _mali_osk_mem_mapregion_init\n"));
- return -_MALI_OSK_ERR_FAULT;
- }
-
- vma = (struct vm_area_struct*)descriptor->process_mapping_info;
- if (NULL == vma )
- {
- kfree(vma_usage_tracker);
- return _MALI_OSK_ERR_FAULT;
- }
-
- vma->vm_private_data = vma_usage_tracker;
- vma->vm_flags |= VM_IO;
- vma->vm_flags |= VM_RESERVED;
-
- if (0==descriptor->is_cached)
- {
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
- }
- DBG_MSG(3, ("Mapping with page_prot: 0x%x\n", vma->vm_page_prot ));
-
- /* Setup the functions which handle further VMA handling */
- vma->vm_ops = &ump_vm_ops;
-
- /* Do the va range allocation - in this case, it was done earlier, so we copy in that information */
- descriptor->mapping = (void __user*)vma->vm_start;
-
- atomic_set(&vma_usage_tracker->references, 1); /*this can later be increased if process is forked, see ump_vma_open() */
- vma_usage_tracker->descriptor = descriptor;
-
- return _MALI_OSK_ERR_OK;
-}
-
-void _ump_osk_mem_mapregion_term( ump_memory_allocation * descriptor )
-{
- struct vm_area_struct* vma;
- ump_vma_usage_tracker * vma_usage_tracker;
-
- if (NULL == descriptor) return;
-
- /* Linux does the right thing as part of munmap to remove the mapping
- * All that remains is that we remove the vma_usage_tracker setup in init() */
- vma = (struct vm_area_struct*)descriptor->process_mapping_info;
-
- vma_usage_tracker = vma->vm_private_data;
-
- /* We only get called if mem_mapregion_init succeeded */
- kfree(vma_usage_tracker);
- return;
-}
-
-_mali_osk_errcode_t _ump_osk_mem_mapregion_map( ump_memory_allocation * descriptor, u32 offset, u32 * phys_addr, unsigned long size )
-{
- struct vm_area_struct *vma;
- _mali_osk_errcode_t retval;
-
- if (NULL == descriptor) return _MALI_OSK_ERR_FAULT;
-
- vma = (struct vm_area_struct*)descriptor->process_mapping_info;
-
- if (NULL == vma ) return _MALI_OSK_ERR_FAULT;
-
- retval = remap_pfn_range( vma, ((u32)descriptor->mapping) + offset, (*phys_addr) >> PAGE_SHIFT, size, vma->vm_page_prot) ? _MALI_OSK_ERR_FAULT : _MALI_OSK_ERR_OK;;
-
- DBG_MSG(4, ("Mapping virtual to physical memory. ID: %u, vma: 0x%08lx, virtual addr:0x%08lx, physical addr: 0x%08lx, size:%lu, prot:0x%x, vm_flags:0x%x RETVAL: 0x%x\n",
- ump_dd_secure_id_get(descriptor->handle),
- (unsigned long)vma,
- (unsigned long)(vma->vm_start + offset),
- (unsigned long)*phys_addr,
- size,
- (unsigned int)vma->vm_page_prot, vma->vm_flags, retval));
-
- return retval;
-}
-
-static u32 _ump_osk_virt_to_phys_start(ump_dd_mem * mem, u32 start, u32 address, int *index)
-{
- int i;
- u32 offset = address - start;
- ump_dd_physical_block *block;
- u32 sum = 0;
-
- for (i=0; i<mem->nr_blocks; i++) {
- block = &mem->block_array[i];
- sum += block->size;
- if (sum > offset) {
- *index = i;
- DBG_MSG(3, ("_ump_osk_virt_to_phys : index : %d, virtual 0x%x, phys 0x%x\n", i, address, (u32)block->addr + offset - (sum -block->size)));
- return (u32)block->addr + offset - (sum -block->size);
- }
- }
-
- return _MALI_OSK_ERR_FAULT;
-}
-
-static u32 _ump_osk_virt_to_phys_end(ump_dd_mem * mem, u32 start, u32 address, int *index)
-{
- int i;
- u32 offset = address - start;
- ump_dd_physical_block *block;
- u32 sum = 0;
-
- for (i=0; i<mem->nr_blocks; i++) {
- block = &mem->block_array[i];
- sum += block->size;
- if (sum >= offset) {
- *index = i;
- DBG_MSG(3, ("_ump_osk_virt_to_phys : index : %d, virtual 0x%x, phys 0x%x\n", i, address, (u32)block->addr + offset - (sum -block->size)));
- return (u32)block->addr + offset - (sum -block->size);
- }
- }
-
- return _MALI_OSK_ERR_FAULT;
-}
-
-static void _ump_osk_msync_with_virt(ump_dd_mem * mem, ump_uk_msync_op op, u32 start, u32 address, u32 size)
-{
- int start_index, end_index;
- u32 start_p, end_p;
-
- DBG_MSG(3, ("Cache flush with user virtual address. start : 0x%x, end : 0x%x, address 0x%x, size 0x%x\n", start, start+mem->size_bytes, address, size));
-
- start_p = _ump_osk_virt_to_phys_start(mem, start, address, &start_index);
- end_p = _ump_osk_virt_to_phys_end(mem, start, address+size, &end_index);
-
- if (start_index==end_index) {
- if (op == _UMP_UK_MSYNC_CLEAN_AND_INVALIDATE)
- outer_flush_range(start_p, end_p);
- else
- outer_clean_range(start_p, end_p);
- } else {
- ump_dd_physical_block *block;
- int i;
-
- for (i=start_index; i<=end_index; i++) {
- block = &mem->block_array[i];
-
- if (i == start_index) {
- if (op == _UMP_UK_MSYNC_CLEAN_AND_INVALIDATE) {
- outer_flush_range(start_p, block->addr+block->size);
- } else {
- outer_clean_range(start_p, block->addr+block->size);
- }
- }
- else if (i == end_index) {
- if (op == _UMP_UK_MSYNC_CLEAN_AND_INVALIDATE) {
- outer_flush_range(block->addr, end_p);
- } else {
- outer_clean_range(block->addr, end_p);
- }
- break;
- }
- else {
- if (op == _UMP_UK_MSYNC_CLEAN_AND_INVALIDATE) {
- outer_flush_range(block->addr, block->addr+block->size);
- } else {
- outer_clean_range(block->addr, block->addr+block->size);
- }
- }
- }
- }
- return;
-}
-
-static void level1_cache_flush_all(void)
-{
- DBG_MSG(4, ("UMP[xx] Flushing complete L1 cache\n"));
- __cpuc_flush_kern_all();
-}
-
-void _ump_osk_msync( ump_dd_mem * mem, void * virt, u32 offset, u32 size, ump_uk_msync_op op, ump_session_data * session_data )
-{
- int i;
- const void *start_v, *end_v;
-
- /* Flush L1 using virtual address, the entire range in one go.
- * Only flush if user space process has a valid write mapping on given address. */
- if( (mem) && (virt!=NULL) && (access_ok(VERIFY_WRITE, virt, size)) )
- {
- start_v = (void *)virt;
- end_v = (void *)(start_v + size - 1);
- /* There is no dmac_clean_range, so the L1 is always flushed,
- * also for UMP_MSYNC_CLEAN. */
- if (size >= SZ_64K)
- flush_all_cpu_caches();
- else
- dmac_flush_range(start_v, end_v);
-
- DBG_MSG(3, ("UMP[%02u] Flushing CPU L1 Cache. Cpu address: %x-%x\n", mem->secure_id, start_v,end_v));
- }
- else
- {
- if (session_data)
- {
- if (op == _UMP_UK_MSYNC_FLUSH_L1 )
- {
- DBG_MSG(4, ("UMP Pending L1 cache flushes: %d\n", session_data->has_pending_level1_cache_flush));
- session_data->has_pending_level1_cache_flush = 0;
- level1_cache_flush_all();
- return;
- }
- else
- {
- if (session_data->cache_operations_ongoing)
- {
- session_data->has_pending_level1_cache_flush++;
- DBG_MSG(4, ("UMP[%02u] Defering the L1 flush. Nr pending:%d\n", mem->secure_id, session_data->has_pending_level1_cache_flush) );
- }
- else
- {
- /* Flushing the L1 cache for each switch_user() if ump_cache_operations_control(START) is not called */
- level1_cache_flush_all();
- }
- }
- }
- else
- {
- DBG_MSG(4, ("Unkown state %s %d\n", __FUNCTION__, __LINE__));
- level1_cache_flush_all();
- }
- }
-
- if ( NULL == mem ) return;
-
- if ( mem->size_bytes==size)
- {
- DBG_MSG(3, ("UMP[%02u] Flushing CPU L2 Cache\n",mem->secure_id));
- }
- else
- {
- DBG_MSG(3, ("UMP[%02u] Flushing CPU L2 Cache. Blocks:%u, TotalSize:%u. FlushSize:%u Offset:0x%x FirstPaddr:0x%08x\n",
- mem->secure_id, mem->nr_blocks, mem->size_bytes, size, offset, mem->block_array[0].addr));
- }
-
-
- /* Flush L2 using physical addresses, block for block. */
- if ((virt!=NULL) && (mem->size_bytes >= SZ_1M)) {
- if (op == _UMP_UK_MSYNC_CLEAN)
- outer_clean_all();
- else if ((op == _UMP_UK_MSYNC_INVALIDATE) || (op == _UMP_UK_MSYNC_CLEAN_AND_INVALIDATE))
- outer_flush_all();
- return;
- }
-
- for (i=0 ; i < mem->nr_blocks; i++)
- {
- u32 start_p, end_p;
- ump_dd_physical_block *block;
- block = &mem->block_array[i];
-
- if(offset >= block->size)
- {
- offset -= block->size;
- continue;
- }
-
- if(offset)
- {
- start_p = (u32)block->addr + offset;
- /* We'll zero the offset later, after using it to calculate end_p. */
- }
- else
- {
- start_p = (u32)block->addr;
- }
-
- if(size < block->size - offset)
- {
- end_p = start_p + size - 1;
- size = 0;
- }
- else
- {
- if(offset)
- {
- end_p = start_p + (block->size - offset - 1);
- size -= block->size - offset;
- offset = 0;
- }
- else
- {
- end_p = start_p + block->size - 1;
- size -= block->size;
- }
- }
-
- switch(op)
- {
- case _UMP_UK_MSYNC_CLEAN:
- outer_clean_range(start_p, end_p);
- break;
- case _UMP_UK_MSYNC_CLEAN_AND_INVALIDATE:
- outer_flush_range(start_p, end_p);
- break;
- case _UMP_UK_MSYNC_INVALIDATE:
- outer_inv_range(start_p, end_p);
- break;
- default:
- break;
- }
-
- if(0 == size)
- {
- /* Nothing left to flush. */
- break;
- }
- }
-
- return;
-}
-
-void _ump_osk_mem_mapregion_get( ump_dd_mem ** mem, unsigned long vaddr)
-{
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- ump_vma_usage_tracker * vma_usage_tracker;
- ump_memory_allocation *descriptor;
- ump_dd_handle handle;
-
- DBG_MSG(3, ("_ump_osk_mem_mapregion_get: vaddr 0x%08lx\n", vaddr));
-
- down_read(&mm->mmap_sem);
- vma = find_vma(mm, vaddr);
- up_read(&mm->mmap_sem);
- if(!vma)
- {
- DBG_MSG(3, ("Not found VMA\n"));
- *mem = NULL;
- return;
- }
- DBG_MSG(4, ("Get vma: 0x%08lx vma->vm_start: 0x%08lx\n", (unsigned long)vma, vma->vm_start));
-
- vma_usage_tracker = (struct ump_vma_usage_tracker*)vma->vm_private_data;
- if(vma_usage_tracker == NULL)
- {
- DBG_MSG(3, ("Not found vma_usage_tracker\n"));
- *mem = NULL;
- return;
- }
-
- descriptor = (struct ump_memory_allocation*)vma_usage_tracker->descriptor;
- handle = (ump_dd_handle)descriptor->handle;
-
- DBG_MSG(3, ("Get handle: 0x%08lx\n", handle));
- *mem = (ump_dd_mem*)handle;
-}
-
generated by cgit v1.1 at 2024-05-30 13:30:07 +0000