+++ /dev/null
-/*
- * SRAM allocator for Blackfin on-chip memory
- *
- * Copyright 2004-2009 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/miscdevice.h>
-#include <linux/ioport.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/spinlock.h>
-#include <linux/rtc.h>
-#include <linux/slab.h>
-#include <linux/mm_types.h>
-
-#include <asm/blackfin.h>
-#include <asm/mem_map.h>
-#include "blackfin_sram.h"
-
-/* the data structure for L1 scratchpad and DATA SRAM */
-struct sram_piece {
- void *paddr;
- int size;
- pid_t pid;
- struct sram_piece *next;
-};
-
-static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1sram_lock);
-static DEFINE_PER_CPU(struct sram_piece, free_l1_ssram_head);
-static DEFINE_PER_CPU(struct sram_piece, used_l1_ssram_head);
-
-#if L1_DATA_A_LENGTH != 0
-static DEFINE_PER_CPU(struct sram_piece, free_l1_data_A_sram_head);
-static DEFINE_PER_CPU(struct sram_piece, used_l1_data_A_sram_head);
-#endif
-
-#if L1_DATA_B_LENGTH != 0
-static DEFINE_PER_CPU(struct sram_piece, free_l1_data_B_sram_head);
-static DEFINE_PER_CPU(struct sram_piece, used_l1_data_B_sram_head);
-#endif
-
-#if L1_DATA_A_LENGTH || L1_DATA_B_LENGTH
-static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_data_sram_lock);
-#endif
-
-#if L1_CODE_LENGTH != 0
-static DEFINE_PER_CPU_SHARED_ALIGNED(spinlock_t, l1_inst_sram_lock);
-static DEFINE_PER_CPU(struct sram_piece, free_l1_inst_sram_head);
-static DEFINE_PER_CPU(struct sram_piece, used_l1_inst_sram_head);
-#endif
-
-#if L2_LENGTH != 0
-static spinlock_t l2_sram_lock ____cacheline_aligned_in_smp;
-static struct sram_piece free_l2_sram_head, used_l2_sram_head;
-#endif
-
-static struct kmem_cache *sram_piece_cache;
-
-/* L1 Scratchpad SRAM initialization function */
-static void __init l1sram_init(void)
-{
- unsigned int cpu;
- unsigned long reserve;
-
-#ifdef CONFIG_SMP
- reserve = 0;
-#else
- reserve = sizeof(struct l1_scratch_task_info);
-#endif
-
- for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
- per_cpu(free_l1_ssram_head, cpu).next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!per_cpu(free_l1_ssram_head, cpu).next) {
- printk(KERN_INFO "Fail to initialize Scratchpad data SRAM.\n");
- return;
- }
-
- per_cpu(free_l1_ssram_head, cpu).next->paddr = (void *)get_l1_scratch_start_cpu(cpu) + reserve;
- per_cpu(free_l1_ssram_head, cpu).next->size = L1_SCRATCH_LENGTH - reserve;
- per_cpu(free_l1_ssram_head, cpu).next->pid = 0;
- per_cpu(free_l1_ssram_head, cpu).next->next = NULL;
-
- per_cpu(used_l1_ssram_head, cpu).next = NULL;
-
- /* mutex initialize */
- spin_lock_init(&per_cpu(l1sram_lock, cpu));
- printk(KERN_INFO "Blackfin Scratchpad data SRAM: %d KB\n",
- L1_SCRATCH_LENGTH >> 10);
- }
-}
-
-static void __init l1_data_sram_init(void)
-{
-#if L1_DATA_A_LENGTH != 0 || L1_DATA_B_LENGTH != 0
- unsigned int cpu;
-#endif
-#if L1_DATA_A_LENGTH != 0
- for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
- per_cpu(free_l1_data_A_sram_head, cpu).next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!per_cpu(free_l1_data_A_sram_head, cpu).next) {
- printk(KERN_INFO "Fail to initialize L1 Data A SRAM.\n");
- return;
- }
-
- per_cpu(free_l1_data_A_sram_head, cpu).next->paddr =
- (void *)get_l1_data_a_start_cpu(cpu) + (_ebss_l1 - _sdata_l1);
- per_cpu(free_l1_data_A_sram_head, cpu).next->size =
- L1_DATA_A_LENGTH - (_ebss_l1 - _sdata_l1);
- per_cpu(free_l1_data_A_sram_head, cpu).next->pid = 0;
- per_cpu(free_l1_data_A_sram_head, cpu).next->next = NULL;
-
- per_cpu(used_l1_data_A_sram_head, cpu).next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Data A SRAM: %d KB (%d KB free)\n",
- L1_DATA_A_LENGTH >> 10,
- per_cpu(free_l1_data_A_sram_head, cpu).next->size >> 10);
- }
-#endif
-#if L1_DATA_B_LENGTH != 0
- for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
- per_cpu(free_l1_data_B_sram_head, cpu).next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!per_cpu(free_l1_data_B_sram_head, cpu).next) {
- printk(KERN_INFO "Fail to initialize L1 Data B SRAM.\n");
- return;
- }
-
- per_cpu(free_l1_data_B_sram_head, cpu).next->paddr =
- (void *)get_l1_data_b_start_cpu(cpu) + (_ebss_b_l1 - _sdata_b_l1);
- per_cpu(free_l1_data_B_sram_head, cpu).next->size =
- L1_DATA_B_LENGTH - (_ebss_b_l1 - _sdata_b_l1);
- per_cpu(free_l1_data_B_sram_head, cpu).next->pid = 0;
- per_cpu(free_l1_data_B_sram_head, cpu).next->next = NULL;
-
- per_cpu(used_l1_data_B_sram_head, cpu).next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Data B SRAM: %d KB (%d KB free)\n",
- L1_DATA_B_LENGTH >> 10,
- per_cpu(free_l1_data_B_sram_head, cpu).next->size >> 10);
- /* mutex initialize */
- }
-#endif
-
-#if L1_DATA_A_LENGTH != 0 || L1_DATA_B_LENGTH != 0
- for (cpu = 0; cpu < num_possible_cpus(); ++cpu)
- spin_lock_init(&per_cpu(l1_data_sram_lock, cpu));
-#endif
-}
-
-static void __init l1_inst_sram_init(void)
-{
-#if L1_CODE_LENGTH != 0
- unsigned int cpu;
- for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
- per_cpu(free_l1_inst_sram_head, cpu).next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!per_cpu(free_l1_inst_sram_head, cpu).next) {
- printk(KERN_INFO "Failed to initialize L1 Instruction SRAM\n");
- return;
- }
-
- per_cpu(free_l1_inst_sram_head, cpu).next->paddr =
- (void *)get_l1_code_start_cpu(cpu) + (_etext_l1 - _stext_l1);
- per_cpu(free_l1_inst_sram_head, cpu).next->size =
- L1_CODE_LENGTH - (_etext_l1 - _stext_l1);
- per_cpu(free_l1_inst_sram_head, cpu).next->pid = 0;
- per_cpu(free_l1_inst_sram_head, cpu).next->next = NULL;
-
- per_cpu(used_l1_inst_sram_head, cpu).next = NULL;
-
- printk(KERN_INFO "Blackfin L1 Instruction SRAM: %d KB (%d KB free)\n",
- L1_CODE_LENGTH >> 10,
- per_cpu(free_l1_inst_sram_head, cpu).next->size >> 10);
-
- /* mutex initialize */
- spin_lock_init(&per_cpu(l1_inst_sram_lock, cpu));
- }
-#endif
-}
-
-#ifdef __ADSPBF60x__
-static irqreturn_t l2_ecc_err(int irq, void *dev_id)
-{
- int status;
-
- printk(KERN_ERR "L2 ecc error happened\n");
- status = bfin_read32(L2CTL0_STAT);
- if (status & 0x1)
- printk(KERN_ERR "Core channel error type:0x%x, addr:0x%x\n",
- bfin_read32(L2CTL0_ET0), bfin_read32(L2CTL0_EADDR0));
- if (status & 0x2)
- printk(KERN_ERR "System channel error type:0x%x, addr:0x%x\n",
- bfin_read32(L2CTL0_ET1), bfin_read32(L2CTL0_EADDR1));
-
- status = status >> 8;
- if (status)
- printk(KERN_ERR "L2 Bank%d error, addr:0x%x\n",
- status, bfin_read32(L2CTL0_ERRADDR0 + status));
-
- panic("L2 Ecc error");
- return IRQ_HANDLED;
-}
-#endif
-
-static void __init l2_sram_init(void)
-{
-#if L2_LENGTH != 0
-
-#ifdef __ADSPBF60x__
- int ret;
-
- ret = request_irq(IRQ_L2CTL0_ECC_ERR, l2_ecc_err, 0, "l2-ecc-err",
- NULL);
- if (unlikely(ret < 0)) {
- printk(KERN_INFO "Fail to request l2 ecc error interrupt");
- return;
- }
-#endif
-
- free_l2_sram_head.next =
- kmem_cache_alloc(sram_piece_cache, GFP_KERNEL);
- if (!free_l2_sram_head.next) {
- printk(KERN_INFO "Fail to initialize L2 SRAM.\n");
- return;
- }
-
- free_l2_sram_head.next->paddr =
- (void *)L2_START + (_ebss_l2 - _stext_l2);
- free_l2_sram_head.next->size =
- L2_LENGTH - (_ebss_l2 - _stext_l2);
- free_l2_sram_head.next->pid = 0;
- free_l2_sram_head.next->next = NULL;
-
- used_l2_sram_head.next = NULL;
-
- printk(KERN_INFO "Blackfin L2 SRAM: %d KB (%d KB free)\n",
- L2_LENGTH >> 10,
- free_l2_sram_head.next->size >> 10);
-
- /* mutex initialize */
- spin_lock_init(&l2_sram_lock);
-#endif
-}
-
-static int __init bfin_sram_init(void)
-{
- sram_piece_cache = kmem_cache_create("sram_piece_cache",
- sizeof(struct sram_piece),
- 0, SLAB_PANIC, NULL);
-
- l1sram_init();
- l1_data_sram_init();
- l1_inst_sram_init();
- l2_sram_init();
-
- return 0;
-}
-pure_initcall(bfin_sram_init);
-
-/* SRAM allocate function */
-static void *_sram_alloc(size_t size, struct sram_piece *pfree_head,
- struct sram_piece *pused_head)
-{
- struct sram_piece *pslot, *plast, *pavail;
-
- if (size <= 0 || !pfree_head || !pused_head)
- return NULL;
-
- /* Align the size */
- size = (size + 3) & ~3;
-
- pslot = pfree_head->next;
- plast = pfree_head;
-
- /* search an available piece slot */
- while (pslot != NULL && size > pslot->size) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- if (!pslot)
- return NULL;
-
- if (pslot->size == size) {
- plast->next = pslot->next;
- pavail = pslot;
- } else {
- /* use atomic so our L1 allocator can be used atomically */
- pavail = kmem_cache_alloc(sram_piece_cache, GFP_ATOMIC);
-
- if (!pavail)
- return NULL;
-
- pavail->paddr = pslot->paddr;
- pavail->size = size;
- pslot->paddr += size;
- pslot->size -= size;
- }
-
- pavail->pid = current->pid;
-
- pslot = pused_head->next;
- plast = pused_head;
-
- /* insert new piece into used piece list !!! */
- while (pslot != NULL && pavail->paddr < pslot->paddr) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- pavail->next = pslot;
- plast->next = pavail;
-
- return pavail->paddr;
-}
-
-/* Allocate the largest available block. */
-static void *_sram_alloc_max(struct sram_piece *pfree_head,
- struct sram_piece *pused_head,
- unsigned long *psize)
-{
- struct sram_piece *pslot, *pmax;
-
- if (!pfree_head || !pused_head)
- return NULL;
-
- pmax = pslot = pfree_head->next;
-
- /* search an available piece slot */
- while (pslot != NULL) {
- if (pslot->size > pmax->size)
- pmax = pslot;
- pslot = pslot->next;
- }
-
- if (!pmax)
- return NULL;
-
- *psize = pmax->size;
-
- return _sram_alloc(*psize, pfree_head, pused_head);
-}
-
-/* SRAM free function */
-static int _sram_free(const void *addr,
- struct sram_piece *pfree_head,
- struct sram_piece *pused_head)
-{
- struct sram_piece *pslot, *plast, *pavail;
-
- if (!pfree_head || !pused_head)
- return -1;
-
- /* search the relevant memory slot */
- pslot = pused_head->next;
- plast = pused_head;
-
- /* search an available piece slot */
- while (pslot != NULL && pslot->paddr != addr) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- if (!pslot)
- return -1;
-
- plast->next = pslot->next;
- pavail = pslot;
- pavail->pid = 0;
-
- /* insert free pieces back to the free list */
- pslot = pfree_head->next;
- plast = pfree_head;
-
- while (pslot != NULL && addr > pslot->paddr) {
- plast = pslot;
- pslot = pslot->next;
- }
-
- if (plast != pfree_head && plast->paddr + plast->size == pavail->paddr) {
- plast->size += pavail->size;
- kmem_cache_free(sram_piece_cache, pavail);
- } else {
- pavail->next = plast->next;
- plast->next = pavail;
- plast = pavail;
- }
-
- if (pslot && plast->paddr + plast->size == pslot->paddr) {
- plast->size += pslot->size;
- plast->next = pslot->next;
- kmem_cache_free(sram_piece_cache, pslot);
- }
-
- return 0;
-}
-
-int sram_free(const void *addr)
-{
-
-#if L1_CODE_LENGTH != 0
- if (addr >= (void *)get_l1_code_start()
- && addr < (void *)(get_l1_code_start() + L1_CODE_LENGTH))
- return l1_inst_sram_free(addr);
- else
-#endif
-#if L1_DATA_A_LENGTH != 0
- if (addr >= (void *)get_l1_data_a_start()
- && addr < (void *)(get_l1_data_a_start() + L1_DATA_A_LENGTH))
- return l1_data_A_sram_free(addr);
- else
-#endif
-#if L1_DATA_B_LENGTH != 0
- if (addr >= (void *)get_l1_data_b_start()
- && addr < (void *)(get_l1_data_b_start() + L1_DATA_B_LENGTH))
- return l1_data_B_sram_free(addr);
- else
-#endif
-#if L2_LENGTH != 0
- if (addr >= (void *)L2_START
- && addr < (void *)(L2_START + L2_LENGTH))
- return l2_sram_free(addr);
- else
-#endif
- return -1;
-}
-EXPORT_SYMBOL(sram_free);
-
-void *l1_data_A_sram_alloc(size_t size)
-{
-#if L1_DATA_A_LENGTH != 0
- unsigned long flags;
- void *addr;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- addr = _sram_alloc(size, &per_cpu(free_l1_data_A_sram_head, cpu),
- &per_cpu(used_l1_data_A_sram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- pr_debug("Allocated address in l1_data_A_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL(l1_data_A_sram_alloc);
-
-int l1_data_A_sram_free(const void *addr)
-{
-#if L1_DATA_A_LENGTH != 0
- unsigned long flags;
- int ret;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- ret = _sram_free(addr, &per_cpu(free_l1_data_A_sram_head, cpu),
- &per_cpu(used_l1_data_A_sram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- return ret;
-#else
- return -1;
-#endif
-}
-EXPORT_SYMBOL(l1_data_A_sram_free);
-
-void *l1_data_B_sram_alloc(size_t size)
-{
-#if L1_DATA_B_LENGTH != 0
- unsigned long flags;
- void *addr;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- addr = _sram_alloc(size, &per_cpu(free_l1_data_B_sram_head, cpu),
- &per_cpu(used_l1_data_B_sram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- pr_debug("Allocated address in l1_data_B_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL(l1_data_B_sram_alloc);
-
-int l1_data_B_sram_free(const void *addr)
-{
-#if L1_DATA_B_LENGTH != 0
- unsigned long flags;
- int ret;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- ret = _sram_free(addr, &per_cpu(free_l1_data_B_sram_head, cpu),
- &per_cpu(used_l1_data_B_sram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1_data_sram_lock, cpu), flags);
-
- return ret;
-#else
- return -1;
-#endif
-}
-EXPORT_SYMBOL(l1_data_B_sram_free);
-
-void *l1_data_sram_alloc(size_t size)
-{
- void *addr = l1_data_A_sram_alloc(size);
-
- if (!addr)
- addr = l1_data_B_sram_alloc(size);
-
- return addr;
-}
-EXPORT_SYMBOL(l1_data_sram_alloc);
-
-void *l1_data_sram_zalloc(size_t size)
-{
- void *addr = l1_data_sram_alloc(size);
-
- if (addr)
- memset(addr, 0x00, size);
-
- return addr;
-}
-EXPORT_SYMBOL(l1_data_sram_zalloc);
-
-int l1_data_sram_free(const void *addr)
-{
- int ret;
- ret = l1_data_A_sram_free(addr);
- if (ret == -1)
- ret = l1_data_B_sram_free(addr);
- return ret;
-}
-EXPORT_SYMBOL(l1_data_sram_free);
-
-void *l1_inst_sram_alloc(size_t size)
-{
-#if L1_CODE_LENGTH != 0
- unsigned long flags;
- void *addr;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
-
- addr = _sram_alloc(size, &per_cpu(free_l1_inst_sram_head, cpu),
- &per_cpu(used_l1_inst_sram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
-
- pr_debug("Allocated address in l1_inst_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL(l1_inst_sram_alloc);
-
-int l1_inst_sram_free(const void *addr)
-{
-#if L1_CODE_LENGTH != 0
- unsigned long flags;
- int ret;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1_inst_sram_lock, cpu), flags);
-
- ret = _sram_free(addr, &per_cpu(free_l1_inst_sram_head, cpu),
- &per_cpu(used_l1_inst_sram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1_inst_sram_lock, cpu), flags);
-
- return ret;
-#else
- return -1;
-#endif
-}
-EXPORT_SYMBOL(l1_inst_sram_free);
-
-/* L1 Scratchpad memory allocate function */
-void *l1sram_alloc(size_t size)
-{
- unsigned long flags;
- void *addr;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
-
- addr = _sram_alloc(size, &per_cpu(free_l1_ssram_head, cpu),
- &per_cpu(used_l1_ssram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
-
- return addr;
-}
-
-/* L1 Scratchpad memory allocate function */
-void *l1sram_alloc_max(size_t *psize)
-{
- unsigned long flags;
- void *addr;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
-
- addr = _sram_alloc_max(&per_cpu(free_l1_ssram_head, cpu),
- &per_cpu(used_l1_ssram_head, cpu), psize);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
-
- return addr;
-}
-
-/* L1 Scratchpad memory free function */
-int l1sram_free(const void *addr)
-{
- unsigned long flags;
- int ret;
- unsigned int cpu;
-
- cpu = smp_processor_id();
- /* add mutex operation */
- spin_lock_irqsave(&per_cpu(l1sram_lock, cpu), flags);
-
- ret = _sram_free(addr, &per_cpu(free_l1_ssram_head, cpu),
- &per_cpu(used_l1_ssram_head, cpu));
-
- /* add mutex operation */
- spin_unlock_irqrestore(&per_cpu(l1sram_lock, cpu), flags);
-
- return ret;
-}
-
-void *l2_sram_alloc(size_t size)
-{
-#if L2_LENGTH != 0
- unsigned long flags;
- void *addr;
-
- /* add mutex operation */
- spin_lock_irqsave(&l2_sram_lock, flags);
-
- addr = _sram_alloc(size, &free_l2_sram_head,
- &used_l2_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l2_sram_lock, flags);
-
- pr_debug("Allocated address in l2_sram_alloc is 0x%lx+0x%lx\n",
- (long unsigned int)addr, size);
-
- return addr;
-#else
- return NULL;
-#endif
-}
-EXPORT_SYMBOL(l2_sram_alloc);
-
-void *l2_sram_zalloc(size_t size)
-{
- void *addr = l2_sram_alloc(size);
-
- if (addr)
- memset(addr, 0x00, size);
-
- return addr;
-}
-EXPORT_SYMBOL(l2_sram_zalloc);
-
-int l2_sram_free(const void *addr)
-{
-#if L2_LENGTH != 0
- unsigned long flags;
- int ret;
-
- /* add mutex operation */
- spin_lock_irqsave(&l2_sram_lock, flags);
-
- ret = _sram_free(addr, &free_l2_sram_head,
- &used_l2_sram_head);
-
- /* add mutex operation */
- spin_unlock_irqrestore(&l2_sram_lock, flags);
-
- return ret;
-#else
- return -1;
-#endif
-}
-EXPORT_SYMBOL(l2_sram_free);
-
-int sram_free_with_lsl(const void *addr)
-{
- struct sram_list_struct *lsl, **tmp;
- struct mm_struct *mm = current->mm;
- int ret = -1;
-
- for (tmp = &mm->context.sram_list; *tmp; tmp = &(*tmp)->next)
- if ((*tmp)->addr == addr) {
- lsl = *tmp;
- ret = sram_free(addr);
- *tmp = lsl->next;
- kfree(lsl);
- break;
- }
-
- return ret;
-}
-EXPORT_SYMBOL(sram_free_with_lsl);
-
-/* Allocate memory and keep in L1 SRAM List (lsl) so that the resources are
- * tracked. These are designed for userspace so that when a process exits,
- * we can safely reap their resources.
- */
-void *sram_alloc_with_lsl(size_t size, unsigned long flags)
-{
- void *addr = NULL;
- struct sram_list_struct *lsl = NULL;
- struct mm_struct *mm = current->mm;
-
- lsl = kzalloc(sizeof(struct sram_list_struct), GFP_KERNEL);
- if (!lsl)
- return NULL;
-
- if (flags & L1_INST_SRAM)
- addr = l1_inst_sram_alloc(size);
-
- if (addr == NULL && (flags & L1_DATA_A_SRAM))
- addr = l1_data_A_sram_alloc(size);
-
- if (addr == NULL && (flags & L1_DATA_B_SRAM))
- addr = l1_data_B_sram_alloc(size);
-
- if (addr == NULL && (flags & L2_SRAM))
- addr = l2_sram_alloc(size);
-
- if (addr == NULL) {
- kfree(lsl);
- return NULL;
- }
- lsl->addr = addr;
- lsl->length = size;
- lsl->next = mm->context.sram_list;
- mm->context.sram_list = lsl;
- return addr;
-}
-EXPORT_SYMBOL(sram_alloc_with_lsl);
-
-#ifdef CONFIG_PROC_FS
-/* Once we get a real allocator, we'll throw all of this away.
- * Until then, we need some sort of visibility into the L1 alloc.
- */
-/* Need to keep line of output the same. Currently, that is 44 bytes
- * (including newline).
- */
-static int _sram_proc_show(struct seq_file *m, const char *desc,
- struct sram_piece *pfree_head,
- struct sram_piece *pused_head)
-{
- struct sram_piece *pslot;
-
- if (!pfree_head || !pused_head)
- return -1;
-
- seq_printf(m, "--- SRAM %-14s Size PID State \n", desc);
-
- /* search the relevant memory slot */
- pslot = pused_head->next;
-
- while (pslot != NULL) {
- seq_printf(m, "%p-%p %10i %5i %-10s\n",
- pslot->paddr, pslot->paddr + pslot->size,
- pslot->size, pslot->pid, "ALLOCATED");
-
- pslot = pslot->next;
- }
-
- pslot = pfree_head->next;
-
- while (pslot != NULL) {
- seq_printf(m, "%p-%p %10i %5i %-10s\n",
- pslot->paddr, pslot->paddr + pslot->size,
- pslot->size, pslot->pid, "FREE");
-
- pslot = pslot->next;
- }
-
- return 0;
-}
-static int sram_proc_show(struct seq_file *m, void *v)
-{
- unsigned int cpu;
-
- for (cpu = 0; cpu < num_possible_cpus(); ++cpu) {
- if (_sram_proc_show(m, "Scratchpad",
- &per_cpu(free_l1_ssram_head, cpu), &per_cpu(used_l1_ssram_head, cpu)))
- goto not_done;
-#if L1_DATA_A_LENGTH != 0
- if (_sram_proc_show(m, "L1 Data A",
- &per_cpu(free_l1_data_A_sram_head, cpu),
- &per_cpu(used_l1_data_A_sram_head, cpu)))
- goto not_done;
-#endif
-#if L1_DATA_B_LENGTH != 0
- if (_sram_proc_show(m, "L1 Data B",
- &per_cpu(free_l1_data_B_sram_head, cpu),
- &per_cpu(used_l1_data_B_sram_head, cpu)))
- goto not_done;
-#endif
-#if L1_CODE_LENGTH != 0
- if (_sram_proc_show(m, "L1 Instruction",
- &per_cpu(free_l1_inst_sram_head, cpu),
- &per_cpu(used_l1_inst_sram_head, cpu)))
- goto not_done;
-#endif
- }
-#if L2_LENGTH != 0
- if (_sram_proc_show(m, "L2", &free_l2_sram_head, &used_l2_sram_head))
- goto not_done;
-#endif
- not_done:
- return 0;
-}
-
-static int sram_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, sram_proc_show, NULL);
-}
-
-static const struct file_operations sram_proc_ops = {
- .open = sram_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int __init sram_proc_init(void)
-{
- struct proc_dir_entry *ptr;
-
- ptr = proc_create("sram", S_IRUGO, NULL, &sram_proc_ops);
- if (!ptr) {
- printk(KERN_WARNING "unable to create /proc/sram\n");
- return -1;
- }
- return 0;
-}
-late_initcall(sram_proc_init);
-#endif
git.samba.org / sfrench / cifs-2.6.git / blobdiff