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Commit d77563ff authored by Thierry Reding's avatar Thierry Reding
Browse files

gpu: host1x: firewall: Refactor register check 



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: default avatarThierry Reding <treding@nvidia.com>
parent d7fbcf47

drivers/gpu/host1x/job.c

+31 −26
Original line number Diff line number Diff line
@@ -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--;