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Code Issues Releases Wiki Activity

gpu: host1x: firewall: Refactor register check

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The same code sequence is used in various places to validate a register
access in the command stream. This can be refactored into a separate
function.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2013-10-10 10:24:04 +02:00
parent d7fbcf477a
commit d77563ff56
1 changed files with 31 additions and 26 deletions
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57
drivers/gpu/host1x/job.c
View file

@ -291,25 +291,37 @@ struct host1x_firewall {
u32 count;
};
static int check_register(struct host1x_firewall *fw, unsigned long offset)
{
if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
if (!fw->num_relocs)
return -EINVAL;
if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
return -EINVAL;
fw->num_relocs--;
fw->reloc++;
}
return 0;
}
static int check_mask(struct host1x_firewall *fw)
{
u32 mask = fw->mask;
u32 reg = fw->reg;
int ret;
while (mask) {
if (fw->words == 0)
return -EINVAL;
if (mask & 1) {
if (fw->job->is_addr_reg(fw->dev, fw->class, reg)) {
if (!fw->num_relocs)
return -EINVAL;
if (!check_reloc(fw->reloc, fw->cmdbuf,
fw->offset))
return -EINVAL;
fw->reloc++;
fw->num_relocs--;
}
ret = check_register(fw, reg);
if (ret < 0)
return ret;
fw->words--;
fw->offset++;
}
@ -324,19 +336,16 @@ static int check_incr(struct host1x_firewall *fw)
{
u32 count = fw->count;
u32 reg = fw->reg;
int ret;
while (count) {
if (fw->words == 0)
return -EINVAL;
if (fw->job->is_addr_reg(fw->dev, fw->class, reg)) {
if (!fw->num_relocs)
return -EINVAL;
if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
return -EINVAL;
fw->reloc++;
fw->num_relocs--;
}
ret = check_register(fw, reg);
if (ret < 0)
return ret;
reg++;
fw->words--;
fw->offset++;
@ -348,21 +357,17 @@ static int check_incr(struct host1x_firewall *fw)
static int check_nonincr(struct host1x_firewall *fw)
{
int is_addr_reg = fw->job->is_addr_reg(fw->dev, fw->class, fw->reg);
u32 count = fw->count;
int ret;
while (count) {
if (fw->words == 0)
return -EINVAL;
if (is_addr_reg) {
if (!fw->num_relocs)
return -EINVAL;
if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
return -EINVAL;
fw->reloc++;
fw->num_relocs--;
}
ret = check_register(fw, fw->reg);
if (ret < 0)
return ret;
fw->words--;
fw->offset++;
count--;