mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-05 00:20:32 +00:00
Code Issues Releases Wiki Activity

iommu/ipmmu-vmsa: Calculate context registers' offset instead of a macro

Browse source 
Since we will have changed memory mapping of the IPMMU in the future,
this patch uses ipmmu_features values instead of a macro to
calculate context registers offset. No behavior change.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yoshihiro Shimoda 2019-11-06 11:35:48 +09:00 committed by Joerg Roedel
parent 16d9454f5e
commit 3dc28d9f59
1 changed files with 8 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
drivers/iommu/ipmmu-vmsa.c
View file

@ -50,6 +50,8 @@ struct ipmmu_features {
bool twobit_imttbcr_sl0;
bool reserved_context;
bool cache_snoop;
unsigned int ctx_offset_base;
unsigned int ctx_offset_stride;
};
struct ipmmu_vmsa_device {
@ -99,8 +101,6 @@ static struct ipmmu_vmsa_device *to_ipmmu(struct device *dev)
#define IM_NS_ALIAS_OFFSET 0x800
#define IM_CTX_SIZE 0x40
/* MMU "context" registers */
#define IMCTR 0x0000 /* R-Car Gen2/3 */
#define IMCTR_INTEN (1 << 2) /* R-Car Gen2/3 */
@ -193,7 +193,8 @@ static void ipmmu_write(struct ipmmu_vmsa_device *mmu, unsigned int offset,
static unsigned int ipmmu_ctx_reg(struct ipmmu_vmsa_device *mmu,
unsigned int context_id, unsigned int reg)
{
return context_id * IM_CTX_SIZE + reg;
return mmu->features->ctx_offset_base +
context_id * mmu->features->ctx_offset_stride + reg;
}
static u32 ipmmu_ctx_read(struct ipmmu_vmsa_device *mmu,
@ -939,6 +940,8 @@ static const struct ipmmu_features ipmmu_features_default = {
.twobit_imttbcr_sl0 = false,
.reserved_context = false,
.cache_snoop = true,
.ctx_offset_base = 0,
.ctx_offset_stride = 0x40,
};
static const struct ipmmu_features ipmmu_features_rcar_gen3 = {
@ -950,6 +953,8 @@ static const struct ipmmu_features ipmmu_features_rcar_gen3 = {
.twobit_imttbcr_sl0 = true,
.reserved_context = true,
.cache_snoop = false,
.ctx_offset_base = 0,
.ctx_offset_stride = 0x40,
};
static const struct of_device_id ipmmu_of_ids[] = {