You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
389 lines
11 KiB
389 lines
11 KiB
From 361974032ae1b0eec36c51a8f1cd9b447864fcbd Mon Sep 17 00:00:00 2001
|
|
From: Sugizaki Yukimasa <i.can.speak.c.and.basic@gmail.com>
|
|
Date: Fri, 5 Jan 2018 00:44:00 +0900
|
|
Subject: [PATCH 150/454] vcsm: Unify cache manipulating functions
|
|
|
|
Signed-off-by: Sugizaki Yukimasa <i.can.speak.c.and.basic@gmail.com>
|
|
---
|
|
drivers/char/broadcom/vc_sm/vmcs_sm.c | 309 +++++++++++---------------
|
|
1 file changed, 132 insertions(+), 177 deletions(-)
|
|
|
|
--- a/drivers/char/broadcom/vc_sm/vmcs_sm.c
|
|
+++ b/drivers/char/broadcom/vc_sm/vmcs_sm.c
|
|
@@ -1256,61 +1256,106 @@ static const struct vm_operations_struct
|
|
.fault = vcsm_vma_fault,
|
|
};
|
|
|
|
-/* Walks a VMA and clean each valid page from the cache */
|
|
-static void vcsm_vma_cache_clean_page_range(unsigned long addr,
|
|
- unsigned long end)
|
|
+static int clean_invalid_mem_2d(const void __user *addr,
|
|
+ const size_t block_count, const size_t block_size, const size_t stride,
|
|
+ const unsigned cache_op)
|
|
{
|
|
- pgd_t *pgd;
|
|
- pud_t *pud;
|
|
- pmd_t *pmd;
|
|
- pte_t *pte;
|
|
- unsigned long pgd_next, pud_next, pmd_next;
|
|
-
|
|
- if (addr >= end)
|
|
- return;
|
|
-
|
|
- /* Walk PGD */
|
|
- pgd = pgd_offset(current->mm, addr);
|
|
- do {
|
|
- pgd_next = pgd_addr_end(addr, end);
|
|
-
|
|
- if (pgd_none(*pgd) || pgd_bad(*pgd))
|
|
- continue;
|
|
-
|
|
- /* Walk PUD */
|
|
- pud = pud_offset(pgd, addr);
|
|
- do {
|
|
- pud_next = pud_addr_end(addr, pgd_next);
|
|
- if (pud_none(*pud) || pud_bad(*pud))
|
|
- continue;
|
|
-
|
|
- /* Walk PMD */
|
|
- pmd = pmd_offset(pud, addr);
|
|
- do {
|
|
- pmd_next = pmd_addr_end(addr, pud_next);
|
|
- if (pmd_none(*pmd) || pmd_bad(*pmd))
|
|
- continue;
|
|
-
|
|
- /* Walk PTE */
|
|
- pte = pte_offset_map(pmd, addr);
|
|
- do {
|
|
- if (pte_none(*pte)
|
|
- || !pte_present(*pte))
|
|
- continue;
|
|
-
|
|
- /* Clean + invalidate */
|
|
- dmac_flush_range((const void *) addr,
|
|
- (const void *)
|
|
- (addr + PAGE_SIZE));
|
|
-
|
|
- } while (pte++, addr +=
|
|
- PAGE_SIZE, addr != pmd_next);
|
|
- pte_unmap(pte);
|
|
+ size_t i;
|
|
+ void (*op_fn)(const void*, const void*);
|
|
|
|
- } while (pmd++, addr = pmd_next, addr != pud_next);
|
|
+ if (block_size <= 0) {
|
|
+ pr_err("[%s]: size cannot be 0\n", __func__);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ switch (cache_op) {
|
|
+ case VCSM_CACHE_OP_INV:
|
|
+ op_fn = dmac_inv_range;
|
|
+ break;
|
|
+ case VCSM_CACHE_OP_CLEAN:
|
|
+ op_fn = dmac_clean_range;
|
|
+ break;
|
|
+ case VCSM_CACHE_OP_FLUSH:
|
|
+ op_fn = dmac_flush_range;
|
|
+ break;
|
|
+ default:
|
|
+ pr_err("[%s]: Invalid cache_op: 0x%08x\n", __func__, cache_op);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ for (i = 0; i < block_count; i ++, addr += stride)
|
|
+ op_fn(addr, addr + block_size);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int clean_invalid_mem(const void __user *addr, const size_t size,
|
|
+ const unsigned cache_op)
|
|
+{
|
|
+ return clean_invalid_mem_2d(addr, 1, size, 0, cache_op);
|
|
+}
|
|
+
|
|
+static int clean_invalid_resource(const void __user *addr, const size_t size,
|
|
+ const unsigned cache_op, const int usr_hdl,
|
|
+ struct sm_resource_t *resource)
|
|
+{
|
|
+ int err;
|
|
+ enum sm_stats_t stat_attempt, stat_failure;
|
|
+ void __user *res_addr;
|
|
+
|
|
+ if (resource == NULL) {
|
|
+ pr_err("[%s]: resource is NULL\n", __func__);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ if (resource->res_cached != VMCS_SM_CACHE_HOST &&
|
|
+ resource->res_cached != VMCS_SM_CACHE_BOTH)
|
|
+ return 0;
|
|
+
|
|
+ switch (cache_op) {
|
|
+ case VCSM_CACHE_OP_INV:
|
|
+ stat_attempt = INVALID;
|
|
+ stat_failure = INVALID_FAIL;
|
|
+ break;
|
|
+ case VCSM_CACHE_OP_CLEAN:
|
|
+ /* Like the original VMCS_SM_CMD_CLEAN_INVALID ioctl handler does. */
|
|
+ stat_attempt = FLUSH;
|
|
+ stat_failure = FLUSH_FAIL;
|
|
+ break;
|
|
+ case VCSM_CACHE_OP_FLUSH:
|
|
+ stat_attempt = FLUSH;
|
|
+ stat_failure = FLUSH_FAIL;
|
|
+ break;
|
|
+ default:
|
|
+ pr_err("[%s]: Invalid cache_op: 0x%08x\n", __func__, cache_op);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ resource->res_stats[stat_attempt]++;
|
|
|
|
- } while (pud++, addr = pud_next, addr != pgd_next);
|
|
- } while (pgd++, addr = pgd_next, addr != end);
|
|
+ if (size > resource->res_size) {
|
|
+ pr_err("[%s]: size (0x%08zu) is larger than res_size (0x%08zu)\n",
|
|
+ __func__, size, resource->res_size);
|
|
+ return -EFAULT;
|
|
+ }
|
|
+ res_addr = (void __user*) vmcs_sm_usr_address_from_pid_and_usr_handle(
|
|
+ current->tgid, usr_hdl);
|
|
+ if (res_addr == NULL) {
|
|
+ pr_err("[%s]: Failed to get user address "
|
|
+ "from pid (%d) and user handle (%d)\n", __func__, current->tgid,
|
|
+ resource->res_handle);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ if (!(res_addr <= addr && addr + size <= res_addr + resource->res_size)) {
|
|
+ pr_err("[%s]: Addr (0x%p-0x%p) out of range (0x%p-0x%p)\n",
|
|
+ __func__, addr, addr + size, res_addr,
|
|
+ res_addr + resource->res_size);
|
|
+ return -EFAULT;
|
|
+ }
|
|
+
|
|
+ err = clean_invalid_mem(addr, size, cache_op);
|
|
+ if (err)
|
|
+ resource->res_stats[stat_failure]++;
|
|
+
|
|
+ return err;
|
|
}
|
|
|
|
/* Map an allocated data into something that the user space. */
|
|
@@ -1952,14 +1997,13 @@ static int vc_sm_ioctl_unlock(struct sm_
|
|
list_for_each_entry(map, &resource->map_list,
|
|
resource_map_list) {
|
|
if (map->vma) {
|
|
- unsigned long start;
|
|
- unsigned long end;
|
|
-
|
|
- start = map->vma->vm_start;
|
|
- end = map->vma->vm_end;
|
|
+ const unsigned long start = map->vma->vm_start;
|
|
+ const unsigned long end = map->vma->vm_end;
|
|
|
|
- vcsm_vma_cache_clean_page_range(
|
|
- start, end);
|
|
+ ret = clean_invalid_mem((void __user*) start, end - start,
|
|
+ VCSM_CACHE_OP_FLUSH);
|
|
+ if (ret)
|
|
+ goto error;
|
|
}
|
|
}
|
|
up_read(¤t->mm->mmap_sem);
|
|
@@ -2833,41 +2877,17 @@ static long vc_sm_ioctl(struct file *fil
|
|
/* Locate resource from GUID. */
|
|
resource =
|
|
vmcs_sm_acquire_resource(file_data, ioparam.handle);
|
|
-
|
|
- if ((resource != NULL) && resource->res_cached) {
|
|
- dma_addr_t phys_addr = 0;
|
|
-
|
|
- resource->res_stats[FLUSH]++;
|
|
-
|
|
- phys_addr =
|
|
- (dma_addr_t)((uint32_t)
|
|
- resource->res_base_mem &
|
|
- 0x3FFFFFFF);
|
|
- phys_addr += (dma_addr_t)mm_vc_mem_phys_addr;
|
|
-
|
|
- /* L1 cache flush */
|
|
- down_read(¤t->mm->mmap_sem);
|
|
- vcsm_vma_cache_clean_page_range((unsigned long)
|
|
- ioparam.addr,
|
|
- (unsigned long)
|
|
- ioparam.addr +
|
|
- ioparam.size);
|
|
- up_read(¤t->mm->mmap_sem);
|
|
-
|
|
- /* L2 cache flush */
|
|
- outer_clean_range(phys_addr,
|
|
- phys_addr +
|
|
- (size_t) ioparam.size);
|
|
- } else if (resource == NULL) {
|
|
+ if (resource == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
- if (resource)
|
|
- vmcs_sm_release_resource(resource, 0);
|
|
-
|
|
- /* Done. */
|
|
- goto out;
|
|
+ ret = clean_invalid_resource((void __user*) ioparam.addr,
|
|
+ ioparam.size, VCSM_CACHE_OP_FLUSH, ioparam.handle,
|
|
+ resource);
|
|
+ vmcs_sm_release_resource(resource, 0);
|
|
+ if (ret)
|
|
+ goto out;
|
|
}
|
|
break;
|
|
|
|
@@ -2888,41 +2908,16 @@ static long vc_sm_ioctl(struct file *fil
|
|
/* Locate resource from GUID. */
|
|
resource =
|
|
vmcs_sm_acquire_resource(file_data, ioparam.handle);
|
|
-
|
|
- if ((resource != NULL) && resource->res_cached) {
|
|
- dma_addr_t phys_addr = 0;
|
|
-
|
|
- resource->res_stats[INVALID]++;
|
|
-
|
|
- phys_addr =
|
|
- (dma_addr_t)((uint32_t)
|
|
- resource->res_base_mem &
|
|
- 0x3FFFFFFF);
|
|
- phys_addr += (dma_addr_t)mm_vc_mem_phys_addr;
|
|
-
|
|
- /* L2 cache invalidate */
|
|
- outer_inv_range(phys_addr,
|
|
- phys_addr +
|
|
- (size_t) ioparam.size);
|
|
-
|
|
- /* L1 cache invalidate */
|
|
- down_read(¤t->mm->mmap_sem);
|
|
- vcsm_vma_cache_clean_page_range((unsigned long)
|
|
- ioparam.addr,
|
|
- (unsigned long)
|
|
- ioparam.addr +
|
|
- ioparam.size);
|
|
- up_read(¤t->mm->mmap_sem);
|
|
- } else if (resource == NULL) {
|
|
+ if (resource == NULL) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
- if (resource)
|
|
- vmcs_sm_release_resource(resource, 0);
|
|
-
|
|
- /* Done. */
|
|
- goto out;
|
|
+ ret = clean_invalid_resource((void __user*) ioparam.addr,
|
|
+ ioparam.size, VCSM_CACHE_OP_INV, ioparam.handle, resource);
|
|
+ vmcs_sm_release_resource(resource, 0);
|
|
+ if (ret)
|
|
+ goto out;
|
|
}
|
|
break;
|
|
|
|
@@ -2941,43 +2936,27 @@ static long vc_sm_ioctl(struct file *fil
|
|
goto out;
|
|
}
|
|
for (i = 0; i < sizeof(ioparam.s) / sizeof(*ioparam.s); i++) {
|
|
- switch (ioparam.s[i].cmd) {
|
|
- case VCSM_CACHE_OP_INV: /* L1/L2 invalidate virtual range */
|
|
- case VCSM_CACHE_OP_FLUSH: /* L1/L2 clean physical range */
|
|
- case VCSM_CACHE_OP_CLEAN: /* L1/L2 clean+invalidate all */
|
|
- /* Locate resource from GUID. */
|
|
- resource =
|
|
- vmcs_sm_acquire_resource(file_data, ioparam.s[i].handle);
|
|
-
|
|
- if ((resource != NULL) && resource->res_cached) {
|
|
- unsigned long base = ioparam.s[i].addr & ~(PAGE_SIZE - 1);
|
|
- unsigned long end = (ioparam.s[i].addr + ioparam.s[i].size + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
|
|
-
|
|
- resource->res_stats[ioparam.s[i].cmd == 1 ? INVALID : FLUSH]++;
|
|
-
|
|
- /* L1/L2 cache flush */
|
|
- down_read(¤t->mm->mmap_sem);
|
|
- vcsm_vma_cache_clean_page_range(base, end);
|
|
- up_read(¤t->mm->mmap_sem);
|
|
- } else if (resource == NULL) {
|
|
- ret = -EINVAL;
|
|
- goto out;
|
|
- }
|
|
-
|
|
- if (resource)
|
|
- vmcs_sm_release_resource(resource, 0);
|
|
-
|
|
- break;
|
|
- default:
|
|
- break; /* NOOP */
|
|
+ /* Locate resource from GUID. */
|
|
+ resource =
|
|
+ vmcs_sm_acquire_resource(file_data, ioparam.s[i].handle);
|
|
+ if (resource == NULL) {
|
|
+ ret = -EINVAL;
|
|
+ goto out;
|
|
}
|
|
+
|
|
+ ret = clean_invalid_resource((void __user*) ioparam.s[i].addr,
|
|
+ ioparam.s[i].size, ioparam.s[i].cmd,
|
|
+ ioparam.s[i].handle, resource);
|
|
+ vmcs_sm_release_resource(resource, 0);
|
|
+ if (ret)
|
|
+ goto out;
|
|
}
|
|
}
|
|
break;
|
|
/* Flush/Invalidate the cache for a given mapping. */
|
|
case VMCS_SM_CMD_CLEAN_INVALID2:
|
|
{
|
|
- int i, j;
|
|
+ int i;
|
|
struct vmcs_sm_ioctl_clean_invalid2 ioparam;
|
|
struct vmcs_sm_ioctl_clean_invalid_block *block = NULL;
|
|
|
|
@@ -3006,36 +2985,12 @@ static long vc_sm_ioctl(struct file *fil
|
|
|
|
for (i = 0; i < ioparam.op_count; i++) {
|
|
const struct vmcs_sm_ioctl_clean_invalid_block * const op = block + i;
|
|
- void (*op_fn)(const void *, const void *);
|
|
|
|
- switch(op->invalidate_mode & 3) {
|
|
- case VCSM_CACHE_OP_INV:
|
|
- op_fn = dmac_inv_range;
|
|
- break;
|
|
- case VCSM_CACHE_OP_CLEAN:
|
|
- op_fn = dmac_clean_range;
|
|
- break;
|
|
- case VCSM_CACHE_OP_FLUSH:
|
|
- op_fn = dmac_flush_range;
|
|
- break;
|
|
- default:
|
|
- op_fn = 0;
|
|
- break;
|
|
- }
|
|
-
|
|
- if ((op->invalidate_mode & ~3) != 0) {
|
|
- ret = -EINVAL;
|
|
- break;
|
|
- }
|
|
-
|
|
- if (op_fn == 0)
|
|
- continue;
|
|
-
|
|
- for (j = 0; j < op->block_count; ++j) {
|
|
- const char * const base = (const char *)op->start_address + j * op->inter_block_stride;
|
|
- const char * const end = base + op->block_size;
|
|
- op_fn(base, end);
|
|
- }
|
|
+ ret = clean_invalid_mem_2d((void __user*) op->start_address,
|
|
+ op->block_count, op->block_size,
|
|
+ op->inter_block_stride, op->invalidate_mode);
|
|
+ if (ret)
|
|
+ goto out;
|
|
}
|
|
kfree(block);
|
|
}
|
|
|