* [PATCH 01/15] iommu/arm-smmu: Convert GR0 registers to bitfields
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-14 17:20 ` Will Deacon
2019-08-09 17:07 ` [PATCH 02/15] iommu/arm-smmu: Convert GR1 " Robin Murphy
` (15 subsequent siblings)
16 siblings, 1 reply; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
FIELD_PREP remains a terrible name, but the overall simplification will
make further work on this stuff that much more manageable. This also
serves as an audit of the header, wherein we can impose a consistent
grouping and ordering of the offset and field definitions
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-regs.h | 126 ++++++++++++++++------------------
drivers/iommu/arm-smmu.c | 51 +++++++-------
2 files changed, 84 insertions(+), 93 deletions(-)
diff --git a/drivers/iommu/arm-smmu-regs.h b/drivers/iommu/arm-smmu-regs.h
index 1c278f7ae888..d189f025537a 100644
--- a/drivers/iommu/arm-smmu-regs.h
+++ b/drivers/iommu/arm-smmu-regs.h
@@ -10,111 +10,101 @@
#ifndef _ARM_SMMU_REGS_H
#define _ARM_SMMU_REGS_H
+#include <linux/bits.h>
+
/* Configuration registers */
#define ARM_SMMU_GR0_sCR0 0x0
-#define sCR0_CLIENTPD (1 << 0)
-#define sCR0_GFRE (1 << 1)
-#define sCR0_GFIE (1 << 2)
-#define sCR0_EXIDENABLE (1 << 3)
-#define sCR0_GCFGFRE (1 << 4)
-#define sCR0_GCFGFIE (1 << 5)
-#define sCR0_USFCFG (1 << 10)
-#define sCR0_VMIDPNE (1 << 11)
-#define sCR0_PTM (1 << 12)
-#define sCR0_FB (1 << 13)
-#define sCR0_VMID16EN (1 << 31)
-#define sCR0_BSU_SHIFT 14
-#define sCR0_BSU_MASK 0x3
+#define sCR0_VMID16EN BIT(31)
+#define sCR0_BSU GENMASK(15, 14)
+#define sCR0_FB BIT(13)
+#define sCR0_PTM BIT(12)
+#define sCR0_VMIDPNE BIT(11)
+#define sCR0_USFCFG BIT(10)
+#define sCR0_GCFGFIE BIT(5)
+#define sCR0_GCFGFRE BIT(4)
+#define sCR0_EXIDENABLE BIT(3)
+#define sCR0_GFIE BIT(2)
+#define sCR0_GFRE BIT(1)
+#define sCR0_CLIENTPD BIT(0)
/* Auxiliary Configuration register */
#define ARM_SMMU_GR0_sACR 0x10
/* Identification registers */
#define ARM_SMMU_GR0_ID0 0x20
+#define ID0_S1TS BIT(30)
+#define ID0_S2TS BIT(29)
+#define ID0_NTS BIT(28)
+#define ID0_SMS BIT(27)
+#define ID0_ATOSNS BIT(26)
+#define ID0_PTFS_NO_AARCH32 BIT(25)
+#define ID0_PTFS_NO_AARCH32S BIT(24)
+#define ID0_CTTW BIT(14)
+#define ID0_NUMIRPT GENMASK(23, 16)
+#define ID0_NUMSIDB GENMASK(12, 9)
+#define ID0_EXIDS BIT(8)
+#define ID0_NUMSMRG GENMASK(7, 0)
+
#define ARM_SMMU_GR0_ID1 0x24
+#define ID1_PAGESIZE BIT(31)
+#define ID1_NUMPAGENDXB GENMASK(30, 28)
+#define ID1_NUMS2CB GENMASK(23, 16)
+#define ID1_NUMCB GENMASK(7, 0)
+
#define ARM_SMMU_GR0_ID2 0x28
+#define ID2_VMID16 BIT(15)
+#define ID2_PTFS_64K BIT(14)
+#define ID2_PTFS_16K BIT(13)
+#define ID2_PTFS_4K BIT(12)
+#define ID2_UBS GENMASK(11, 8)
+#define ID2_OAS GENMASK(7, 4)
+#define ID2_IAS GENMASK(3, 0)
+
#define ARM_SMMU_GR0_ID3 0x2c
#define ARM_SMMU_GR0_ID4 0x30
#define ARM_SMMU_GR0_ID5 0x34
#define ARM_SMMU_GR0_ID6 0x38
+
#define ARM_SMMU_GR0_ID7 0x3c
+#define ID7_MAJOR GENMASK(7, 4)
+#define ID7_MINOR GENMASK(3, 0)
+
#define ARM_SMMU_GR0_sGFSR 0x48
#define ARM_SMMU_GR0_sGFSYNR0 0x50
#define ARM_SMMU_GR0_sGFSYNR1 0x54
#define ARM_SMMU_GR0_sGFSYNR2 0x58
-#define ID0_S1TS (1 << 30)
-#define ID0_S2TS (1 << 29)
-#define ID0_NTS (1 << 28)
-#define ID0_SMS (1 << 27)
-#define ID0_ATOSNS (1 << 26)
-#define ID0_PTFS_NO_AARCH32 (1 << 25)
-#define ID0_PTFS_NO_AARCH32S (1 << 24)
-#define ID0_CTTW (1 << 14)
-#define ID0_NUMIRPT_SHIFT 16
-#define ID0_NUMIRPT_MASK 0xff
-#define ID0_NUMSIDB_SHIFT 9
-#define ID0_NUMSIDB_MASK 0xf
-#define ID0_EXIDS (1 << 8)
-#define ID0_NUMSMRG_SHIFT 0
-#define ID0_NUMSMRG_MASK 0xff
-
-#define ID1_PAGESIZE (1 << 31)
-#define ID1_NUMPAGENDXB_SHIFT 28
-#define ID1_NUMPAGENDXB_MASK 7
-#define ID1_NUMS2CB_SHIFT 16
-#define ID1_NUMS2CB_MASK 0xff
-#define ID1_NUMCB_SHIFT 0
-#define ID1_NUMCB_MASK 0xff
-
-#define ID2_OAS_SHIFT 4
-#define ID2_OAS_MASK 0xf
-#define ID2_IAS_SHIFT 0
-#define ID2_IAS_MASK 0xf
-#define ID2_UBS_SHIFT 8
-#define ID2_UBS_MASK 0xf
-#define ID2_PTFS_4K (1 << 12)
-#define ID2_PTFS_16K (1 << 13)
-#define ID2_PTFS_64K (1 << 14)
-#define ID2_VMID16 (1 << 15)
-
-#define ID7_MAJOR_SHIFT 4
-#define ID7_MAJOR_MASK 0xf
-
/* Global TLB invalidation */
#define ARM_SMMU_GR0_TLBIVMID 0x64
#define ARM_SMMU_GR0_TLBIALLNSNH 0x68
#define ARM_SMMU_GR0_TLBIALLH 0x6c
#define ARM_SMMU_GR0_sTLBGSYNC 0x70
+
#define ARM_SMMU_GR0_sTLBGSTATUS 0x74
-#define sTLBGSTATUS_GSACTIVE (1 << 0)
+#define sTLBGSTATUS_GSACTIVE BIT(0)
/* Stream mapping registers */
#define ARM_SMMU_GR0_SMR(n) (0x800 + ((n) << 2))
-#define SMR_VALID (1 << 31)
-#define SMR_MASK_SHIFT 16
-#define SMR_ID_SHIFT 0
+#define SMR_VALID BIT(31)
+#define SMR_MASK GENMASK(31, 16)
+#define SMR_ID GENMASK(15, 0)
#define ARM_SMMU_GR0_S2CR(n) (0xc00 + ((n) << 2))
-#define S2CR_CBNDX_SHIFT 0
-#define S2CR_CBNDX_MASK 0xff
-#define S2CR_EXIDVALID (1 << 10)
-#define S2CR_TYPE_SHIFT 16
-#define S2CR_TYPE_MASK 0x3
-enum arm_smmu_s2cr_type {
- S2CR_TYPE_TRANS,
- S2CR_TYPE_BYPASS,
- S2CR_TYPE_FAULT,
-};
-
-#define S2CR_PRIVCFG_SHIFT 24
-#define S2CR_PRIVCFG_MASK 0x3
+#define S2CR_PRIVCFG GENMASK(25, 24)
enum arm_smmu_s2cr_privcfg {
S2CR_PRIVCFG_DEFAULT,
S2CR_PRIVCFG_DIPAN,
S2CR_PRIVCFG_UNPRIV,
S2CR_PRIVCFG_PRIV,
};
+#define S2CR_TYPE GENMASK(17, 16)
+enum arm_smmu_s2cr_type {
+ S2CR_TYPE_TRANS,
+ S2CR_TYPE_BYPASS,
+ S2CR_TYPE_FAULT,
+};
+#define S2CR_EXIDVALID BIT(10)
+#define S2CR_CBNDX GENMASK(7, 0)
/* Context bank attribute registers */
#define ARM_SMMU_GR1_CBAR(n) (0x0 + ((n) << 2))
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 64977c131ee6..89eddc54e41c 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -20,6 +20,7 @@
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
#include <linux/atomic.h>
+#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/dma-iommu.h>
#include <linux/dma-mapping.h>
@@ -1019,7 +1020,7 @@ static void arm_smmu_domain_free(struct iommu_domain *domain)
static void arm_smmu_write_smr(struct arm_smmu_device *smmu, int idx)
{
struct arm_smmu_smr *smr = smmu->smrs + idx;
- u32 reg = smr->id << SMR_ID_SHIFT | smr->mask << SMR_MASK_SHIFT;
+ u32 reg = FIELD_PREP(SMR_ID, smr->id) | FIELD_PREP(SMR_MASK, smr->mask);
if (!(smmu->features & ARM_SMMU_FEAT_EXIDS) && smr->valid)
reg |= SMR_VALID;
@@ -1029,9 +1030,9 @@ static void arm_smmu_write_smr(struct arm_smmu_device *smmu, int idx)
static void arm_smmu_write_s2cr(struct arm_smmu_device *smmu, int idx)
{
struct arm_smmu_s2cr *s2cr = smmu->s2crs + idx;
- u32 reg = (s2cr->type & S2CR_TYPE_MASK) << S2CR_TYPE_SHIFT |
- (s2cr->cbndx & S2CR_CBNDX_MASK) << S2CR_CBNDX_SHIFT |
- (s2cr->privcfg & S2CR_PRIVCFG_MASK) << S2CR_PRIVCFG_SHIFT;
+ u32 reg = FIELD_PREP(S2CR_TYPE, s2cr->type) |
+ FIELD_PREP(S2CR_CBNDX, s2cr->cbndx) |
+ FIELD_PREP(S2CR_PRIVCFG, s2cr->privcfg);
if (smmu->features & ARM_SMMU_FEAT_EXIDS && smmu->smrs &&
smmu->smrs[idx].valid)
@@ -1063,15 +1064,15 @@ static void arm_smmu_test_smr_masks(struct arm_smmu_device *smmu)
* bits are set, so check each one separately. We can reject
* masters later if they try to claim IDs outside these masks.
*/
- smr = smmu->streamid_mask << SMR_ID_SHIFT;
+ smr = FIELD_PREP(SMR_ID, smmu->streamid_mask);
writel_relaxed(smr, gr0_base + ARM_SMMU_GR0_SMR(0));
smr = readl_relaxed(gr0_base + ARM_SMMU_GR0_SMR(0));
- smmu->streamid_mask = smr >> SMR_ID_SHIFT;
+ smmu->streamid_mask = FIELD_GET(SMR_ID, smr);
- smr = smmu->streamid_mask << SMR_MASK_SHIFT;
+ smr = FIELD_PREP(SMR_MASK, smmu->streamid_mask);
writel_relaxed(smr, gr0_base + ARM_SMMU_GR0_SMR(0));
smr = readl_relaxed(gr0_base + ARM_SMMU_GR0_SMR(0));
- smmu->smr_mask_mask = smr >> SMR_MASK_SHIFT;
+ smmu->smr_mask_mask = FIELD_GET(SMR_MASK, smr);
}
static int arm_smmu_find_sme(struct arm_smmu_device *smmu, u16 id, u16 mask)
@@ -1140,8 +1141,8 @@ static int arm_smmu_master_alloc_smes(struct device *dev)
mutex_lock(&smmu->stream_map_mutex);
/* Figure out a viable stream map entry allocation */
for_each_cfg_sme(fwspec, i, idx) {
- u16 sid = fwspec->ids[i];
- u16 mask = fwspec->ids[i] >> SMR_MASK_SHIFT;
+ u16 sid = FIELD_GET(SMR_ID, fwspec->ids[i]);
+ u16 mask = FIELD_GET(SMR_MASK, fwspec->ids[i]);
if (idx != INVALID_SMENDX) {
ret = -EEXIST;
@@ -1466,8 +1467,8 @@ static int arm_smmu_add_device(struct device *dev)
ret = -EINVAL;
for (i = 0; i < fwspec->num_ids; i++) {
- u16 sid = fwspec->ids[i];
- u16 mask = fwspec->ids[i] >> SMR_MASK_SHIFT;
+ u16 sid = FIELD_GET(SMR_ID, fwspec->ids[i]);
+ u16 mask = FIELD_GET(SMR_MASK, fwspec->ids[i]);
if (sid & ~smmu->streamid_mask) {
dev_err(dev, "stream ID 0x%x out of range for SMMU (0x%x)\n",
@@ -1648,12 +1649,12 @@ static int arm_smmu_of_xlate(struct device *dev, struct of_phandle_args *args)
u32 mask, fwid = 0;
if (args->args_count > 0)
- fwid |= (u16)args->args[0];
+ fwid |= FIELD_PREP(SMR_ID, args->args[0]);
if (args->args_count > 1)
- fwid |= (u16)args->args[1] << SMR_MASK_SHIFT;
+ fwid |= FIELD_PREP(SMR_MASK, args->args[1]);
else if (!of_property_read_u32(args->np, "stream-match-mask", &mask))
- fwid |= (u16)mask << SMR_MASK_SHIFT;
+ fwid |= FIELD_PREP(SMR_MASK, mask);
return iommu_fwspec_add_ids(dev, &fwid, 1);
}
@@ -1728,7 +1729,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
* bit is only present in MMU-500r2 onwards.
*/
reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID7);
- major = (reg >> ID7_MAJOR_SHIFT) & ID7_MAJOR_MASK;
+ major = FIELD_GET(ID7_MAJOR, reg);
reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_sACR);
if (major >= 2)
reg &= ~ARM_MMU500_ACR_CACHE_LOCK;
@@ -1780,7 +1781,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
reg &= ~sCR0_FB;
/* Don't upgrade barriers */
- reg &= ~(sCR0_BSU_MASK << sCR0_BSU_SHIFT);
+ reg &= ~(sCR0_BSU);
if (smmu->features & ARM_SMMU_FEAT_VMID16)
reg |= sCR0_VMID16EN;
@@ -1879,12 +1880,12 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
smmu->features |= ARM_SMMU_FEAT_EXIDS;
size = 1 << 16;
} else {
- size = 1 << ((id >> ID0_NUMSIDB_SHIFT) & ID0_NUMSIDB_MASK);
+ size = 1 << FIELD_GET(ID0_NUMSIDB, id);
}
smmu->streamid_mask = size - 1;
if (id & ID0_SMS) {
smmu->features |= ARM_SMMU_FEAT_STREAM_MATCH;
- size = (id >> ID0_NUMSMRG_SHIFT) & ID0_NUMSMRG_MASK;
+ size = FIELD_GET(ID0_NUMSMRG, id);
if (size == 0) {
dev_err(smmu->dev,
"stream-matching supported, but no SMRs present!\n");
@@ -1923,15 +1924,15 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
smmu->pgshift = (id & ID1_PAGESIZE) ? 16 : 12;
/* Check for size mismatch of SMMU address space from mapped region */
- size = 1 << (((id >> ID1_NUMPAGENDXB_SHIFT) & ID1_NUMPAGENDXB_MASK) + 1);
+ size = 1 << (FIELD_GET(ID1_NUMPAGENDXB, id) + 1);
size <<= smmu->pgshift;
if (smmu->cb_base != gr0_base + size)
dev_warn(smmu->dev,
"SMMU address space size (0x%lx) differs from mapped region size (0x%tx)!\n",
size * 2, (smmu->cb_base - gr0_base) * 2);
- smmu->num_s2_context_banks = (id >> ID1_NUMS2CB_SHIFT) & ID1_NUMS2CB_MASK;
- smmu->num_context_banks = (id >> ID1_NUMCB_SHIFT) & ID1_NUMCB_MASK;
+ smmu->num_s2_context_banks = FIELD_GET(ID1_NUMS2CB, id);
+ smmu->num_context_banks = FIELD_GET(ID1_NUMCB, id);
if (smmu->num_s2_context_banks > smmu->num_context_banks) {
dev_err(smmu->dev, "impossible number of S2 context banks!\n");
return -ENODEV;
@@ -1957,11 +1958,11 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
/* ID2 */
id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID2);
- size = arm_smmu_id_size_to_bits((id >> ID2_IAS_SHIFT) & ID2_IAS_MASK);
+ size = arm_smmu_id_size_to_bits(FIELD_GET(ID2_IAS, id));
smmu->ipa_size = size;
/* The output mask is also applied for bypass */
- size = arm_smmu_id_size_to_bits((id >> ID2_OAS_SHIFT) & ID2_OAS_MASK);
+ size = arm_smmu_id_size_to_bits(FIELD_GET(ID2_OAS, id));
smmu->pa_size = size;
if (id & ID2_VMID16)
@@ -1981,7 +1982,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
if (smmu->version == ARM_SMMU_V1_64K)
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH64_64K;
} else {
- size = (id >> ID2_UBS_SHIFT) & ID2_UBS_MASK;
+ size = FIELD_GET(ID2_UBS, id);
smmu->va_size = arm_smmu_id_size_to_bits(size);
if (id & ID2_PTFS_4K)
smmu->features |= ARM_SMMU_FEAT_FMT_AARCH64_4K;
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* Re: [PATCH 01/15] iommu/arm-smmu: Convert GR0 registers to bitfields
2019-08-09 17:07 ` [PATCH 01/15] iommu/arm-smmu: Convert GR0 registers to bitfields Robin Murphy
@ 2019-08-14 17:20 ` Will Deacon
2019-08-14 17:35 ` Robin Murphy
0 siblings, 1 reply; 30+ messages in thread
From: Will Deacon @ 2019-08-14 17:20 UTC (permalink / raw)
To: Robin Murphy; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On Fri, Aug 09, 2019 at 06:07:38PM +0100, Robin Murphy wrote:
> FIELD_PREP remains a terrible name, but the overall simplification will
> make further work on this stuff that much more manageable. This also
> serves as an audit of the header, wherein we can impose a consistent
> grouping and ordering of the offset and field definitions
>
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
> drivers/iommu/arm-smmu-regs.h | 126 ++++++++++++++++------------------
> drivers/iommu/arm-smmu.c | 51 +++++++-------
> 2 files changed, 84 insertions(+), 93 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu-regs.h b/drivers/iommu/arm-smmu-regs.h
> index 1c278f7ae888..d189f025537a 100644
> --- a/drivers/iommu/arm-smmu-regs.h
> +++ b/drivers/iommu/arm-smmu-regs.h
> @@ -10,111 +10,101 @@
> #ifndef _ARM_SMMU_REGS_H
> #define _ARM_SMMU_REGS_H
>
> +#include <linux/bits.h>
> +
> /* Configuration registers */
> #define ARM_SMMU_GR0_sCR0 0x0
> -#define sCR0_CLIENTPD (1 << 0)
> -#define sCR0_GFRE (1 << 1)
> -#define sCR0_GFIE (1 << 2)
> -#define sCR0_EXIDENABLE (1 << 3)
> -#define sCR0_GCFGFRE (1 << 4)
> -#define sCR0_GCFGFIE (1 << 5)
> -#define sCR0_USFCFG (1 << 10)
> -#define sCR0_VMIDPNE (1 << 11)
> -#define sCR0_PTM (1 << 12)
> -#define sCR0_FB (1 << 13)
> -#define sCR0_VMID16EN (1 << 31)
> -#define sCR0_BSU_SHIFT 14
> -#define sCR0_BSU_MASK 0x3
> +#define sCR0_VMID16EN BIT(31)
> +#define sCR0_BSU GENMASK(15, 14)
> +#define sCR0_FB BIT(13)
> +#define sCR0_PTM BIT(12)
> +#define sCR0_VMIDPNE BIT(11)
> +#define sCR0_USFCFG BIT(10)
> +#define sCR0_GCFGFIE BIT(5)
> +#define sCR0_GCFGFRE BIT(4)
> +#define sCR0_EXIDENABLE BIT(3)
> +#define sCR0_GFIE BIT(2)
> +#define sCR0_GFRE BIT(1)
> +#define sCR0_CLIENTPD BIT(0)
>
> /* Auxiliary Configuration register */
> #define ARM_SMMU_GR0_sACR 0x10
>
> /* Identification registers */
> #define ARM_SMMU_GR0_ID0 0x20
> +#define ID0_S1TS BIT(30)
> +#define ID0_S2TS BIT(29)
> +#define ID0_NTS BIT(28)
> +#define ID0_SMS BIT(27)
> +#define ID0_ATOSNS BIT(26)
> +#define ID0_PTFS_NO_AARCH32 BIT(25)
> +#define ID0_PTFS_NO_AARCH32S BIT(24)
> +#define ID0_CTTW BIT(14)
> +#define ID0_NUMIRPT GENMASK(23, 16)
nit: assuming this should be above ID0_CTTW so things are in descending
bit order?
Other than that, looks good to me.
Will
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 01/15] iommu/arm-smmu: Convert GR0 registers to bitfields
2019-08-14 17:20 ` Will Deacon
@ 2019-08-14 17:35 ` Robin Murphy
0 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-14 17:35 UTC (permalink / raw)
To: Will Deacon; +Cc: gregory.clement, iommu, bjorn.andersson, linux-arm-kernel
On 14/08/2019 18:20, Will Deacon wrote:
> On Fri, Aug 09, 2019 at 06:07:38PM +0100, Robin Murphy wrote:
>> FIELD_PREP remains a terrible name, but the overall simplification will
>> make further work on this stuff that much more manageable. This also
>> serves as an audit of the header, wherein we can impose a consistent
>> grouping and ordering of the offset and field definitions
>>
>> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
>> ---
>> drivers/iommu/arm-smmu-regs.h | 126 ++++++++++++++++------------------
>> drivers/iommu/arm-smmu.c | 51 +++++++-------
>> 2 files changed, 84 insertions(+), 93 deletions(-)
>>
>> diff --git a/drivers/iommu/arm-smmu-regs.h b/drivers/iommu/arm-smmu-regs.h
>> index 1c278f7ae888..d189f025537a 100644
>> --- a/drivers/iommu/arm-smmu-regs.h
>> +++ b/drivers/iommu/arm-smmu-regs.h
>> @@ -10,111 +10,101 @@
>> #ifndef _ARM_SMMU_REGS_H
>> #define _ARM_SMMU_REGS_H
>>
>> +#include <linux/bits.h>
>> +
>> /* Configuration registers */
>> #define ARM_SMMU_GR0_sCR0 0x0
>> -#define sCR0_CLIENTPD (1 << 0)
>> -#define sCR0_GFRE (1 << 1)
>> -#define sCR0_GFIE (1 << 2)
>> -#define sCR0_EXIDENABLE (1 << 3)
>> -#define sCR0_GCFGFRE (1 << 4)
>> -#define sCR0_GCFGFIE (1 << 5)
>> -#define sCR0_USFCFG (1 << 10)
>> -#define sCR0_VMIDPNE (1 << 11)
>> -#define sCR0_PTM (1 << 12)
>> -#define sCR0_FB (1 << 13)
>> -#define sCR0_VMID16EN (1 << 31)
>> -#define sCR0_BSU_SHIFT 14
>> -#define sCR0_BSU_MASK 0x3
>> +#define sCR0_VMID16EN BIT(31)
>> +#define sCR0_BSU GENMASK(15, 14)
>> +#define sCR0_FB BIT(13)
>> +#define sCR0_PTM BIT(12)
>> +#define sCR0_VMIDPNE BIT(11)
>> +#define sCR0_USFCFG BIT(10)
>> +#define sCR0_GCFGFIE BIT(5)
>> +#define sCR0_GCFGFRE BIT(4)
>> +#define sCR0_EXIDENABLE BIT(3)
>> +#define sCR0_GFIE BIT(2)
>> +#define sCR0_GFRE BIT(1)
>> +#define sCR0_CLIENTPD BIT(0)
>>
>> /* Auxiliary Configuration register */
>> #define ARM_SMMU_GR0_sACR 0x10
>>
>> /* Identification registers */
>> #define ARM_SMMU_GR0_ID0 0x20
>> +#define ID0_S1TS BIT(30)
>> +#define ID0_S2TS BIT(29)
>> +#define ID0_NTS BIT(28)
>> +#define ID0_SMS BIT(27)
>> +#define ID0_ATOSNS BIT(26)
>> +#define ID0_PTFS_NO_AARCH32 BIT(25)
>> +#define ID0_PTFS_NO_AARCH32S BIT(24)
>> +#define ID0_CTTW BIT(14)
>> +#define ID0_NUMIRPT GENMASK(23, 16)
>
> nit: assuming this should be above ID0_CTTW so things are in descending
> bit order?
Bah, indeed it should. Fixed now.
> Other than that, looks good to me.
Thanks!
Robin.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH 02/15] iommu/arm-smmu: Convert GR1 registers to bitfields
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
2019-08-09 17:07 ` [PATCH 01/15] iommu/arm-smmu: Convert GR0 registers to bitfields Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 03/15] iommu/arm-smmu: Convert context bank " Robin Murphy
` (14 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
As for GR0, use the bitfield helpers to make GR1 usage a little cleaner,
and use it as an opportunity to audit and tidy the definitions. This
tweaks the handling of CBAR types to match what we did for S2CR a while
back, and fixes a couple of names which didn't quite match the latest
architecture spec (IHI0062D.c).
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-regs.h | 33 ++++++++++++++-------------------
drivers/iommu/arm-smmu.c | 18 +++++++++---------
2 files changed, 23 insertions(+), 28 deletions(-)
diff --git a/drivers/iommu/arm-smmu-regs.h b/drivers/iommu/arm-smmu-regs.h
index d189f025537a..671c2d98c9da 100644
--- a/drivers/iommu/arm-smmu-regs.h
+++ b/drivers/iommu/arm-smmu-regs.h
@@ -108,30 +108,25 @@ enum arm_smmu_s2cr_type {
/* Context bank attribute registers */
#define ARM_SMMU_GR1_CBAR(n) (0x0 + ((n) << 2))
-#define CBAR_VMID_SHIFT 0
-#define CBAR_VMID_MASK 0xff
-#define CBAR_S1_BPSHCFG_SHIFT 8
-#define CBAR_S1_BPSHCFG_MASK 3
-#define CBAR_S1_BPSHCFG_NSH 3
-#define CBAR_S1_MEMATTR_SHIFT 12
-#define CBAR_S1_MEMATTR_MASK 0xf
+#define CBAR_IRPTNDX GENMASK(31, 24)
+#define CBAR_TYPE GENMASK(17, 16)
+enum arm_smmu_cbar_type {
+ CBAR_TYPE_S2_TRANS,
+ CBAR_TYPE_S1_TRANS_S2_BYPASS,
+ CBAR_TYPE_S1_TRANS_S2_FAULT,
+ CBAR_TYPE_S1_TRANS_S2_TRANS,
+};
+#define CBAR_S1_MEMATTR GENMASK(15, 12)
#define CBAR_S1_MEMATTR_WB 0xf
-#define CBAR_TYPE_SHIFT 16
-#define CBAR_TYPE_MASK 0x3
-#define CBAR_TYPE_S2_TRANS (0 << CBAR_TYPE_SHIFT)
-#define CBAR_TYPE_S1_TRANS_S2_BYPASS (1 << CBAR_TYPE_SHIFT)
-#define CBAR_TYPE_S1_TRANS_S2_FAULT (2 << CBAR_TYPE_SHIFT)
-#define CBAR_TYPE_S1_TRANS_S2_TRANS (3 << CBAR_TYPE_SHIFT)
-#define CBAR_IRPTNDX_SHIFT 24
-#define CBAR_IRPTNDX_MASK 0xff
+#define CBAR_S1_BPSHCFG GENMASK(9, 8)
+#define CBAR_S1_BPSHCFG_NSH 3
+#define CBAR_VMID GENMASK(7, 0)
#define ARM_SMMU_GR1_CBFRSYNRA(n) (0x400 + ((n) << 2))
#define ARM_SMMU_GR1_CBA2R(n) (0x800 + ((n) << 2))
-#define CBA2R_RW64_32BIT (0 << 0)
-#define CBA2R_RW64_64BIT (1 << 0)
-#define CBA2R_VMID_SHIFT 16
-#define CBA2R_VMID_MASK 0xffff
+#define CBA2R_VMID16 GENMASK(31, 16)
+#define CBA2R_VA64 BIT(0)
#define ARM_SMMU_CB_SCTLR 0x0
#define ARM_SMMU_CB_ACTLR 0x4
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 89eddc54e41c..515fb1ce39ed 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -237,7 +237,7 @@ struct arm_smmu_cfg {
u16 asid;
u16 vmid;
};
- u32 cbar;
+ enum arm_smmu_cbar_type cbar;
enum arm_smmu_context_fmt fmt;
};
#define INVALID_IRPTNDX 0xff
@@ -692,31 +692,31 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
/* CBA2R */
if (smmu->version > ARM_SMMU_V1) {
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
- reg = CBA2R_RW64_64BIT;
+ reg = CBA2R_VA64;
else
- reg = CBA2R_RW64_32BIT;
+ reg = 0;
/* 16-bit VMIDs live in CBA2R */
if (smmu->features & ARM_SMMU_FEAT_VMID16)
- reg |= cfg->vmid << CBA2R_VMID_SHIFT;
+ reg |= FIELD_PREP(CBA2R_VMID16, cfg->vmid);
writel_relaxed(reg, gr1_base + ARM_SMMU_GR1_CBA2R(idx));
}
/* CBAR */
- reg = cfg->cbar;
+ reg = FIELD_PREP(CBAR_TYPE, cfg->cbar);
if (smmu->version < ARM_SMMU_V2)
- reg |= cfg->irptndx << CBAR_IRPTNDX_SHIFT;
+ reg |= FIELD_PREP(CBAR_IRPTNDX, cfg->irptndx);
/*
* Use the weakest shareability/memory types, so they are
* overridden by the ttbcr/pte.
*/
if (stage1) {
- reg |= (CBAR_S1_BPSHCFG_NSH << CBAR_S1_BPSHCFG_SHIFT) |
- (CBAR_S1_MEMATTR_WB << CBAR_S1_MEMATTR_SHIFT);
+ reg |= FIELD_PREP(CBAR_S1_BPSHCFG, CBAR_S1_BPSHCFG_NSH) |
+ FIELD_PREP(CBAR_S1_MEMATTR, CBAR_S1_MEMATTR_WB);
} else if (!(smmu->features & ARM_SMMU_FEAT_VMID16)) {
/* 8-bit VMIDs live in CBAR */
- reg |= cfg->vmid << CBAR_VMID_SHIFT;
+ reg |= FIELD_PREP(CBAR_VMID, cfg->vmid);
}
writel_relaxed(reg, gr1_base + ARM_SMMU_GR1_CBAR(idx));
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 03/15] iommu/arm-smmu: Convert context bank registers to bitfields
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
2019-08-09 17:07 ` [PATCH 01/15] iommu/arm-smmu: Convert GR0 registers to bitfields Robin Murphy
2019-08-09 17:07 ` [PATCH 02/15] iommu/arm-smmu: Convert GR1 " Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 04/15] iommu/arm-smmu: Rework cb_base handling Robin Murphy
` (13 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Finish the final part of the job, once again updating some names to
match the current spec.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-regs.h | 86 ++++++++++++++++++-----------------
drivers/iommu/arm-smmu.c | 16 +++----
drivers/iommu/qcom_iommu.c | 13 +++---
3 files changed, 59 insertions(+), 56 deletions(-)
diff --git a/drivers/iommu/arm-smmu-regs.h b/drivers/iommu/arm-smmu-regs.h
index 671c2d98c9da..75056edad31d 100644
--- a/drivers/iommu/arm-smmu-regs.h
+++ b/drivers/iommu/arm-smmu-regs.h
@@ -129,19 +129,59 @@ enum arm_smmu_cbar_type {
#define CBA2R_VA64 BIT(0)
#define ARM_SMMU_CB_SCTLR 0x0
+#define SCTLR_S1_ASIDPNE BIT(12)
+#define SCTLR_CFCFG BIT(7)
+#define SCTLR_CFIE BIT(6)
+#define SCTLR_CFRE BIT(5)
+#define SCTLR_E BIT(4)
+#define SCTLR_AFE BIT(2)
+#define SCTLR_TRE BIT(1)
+#define SCTLR_M BIT(0)
+
#define ARM_SMMU_CB_ACTLR 0x4
+
#define ARM_SMMU_CB_RESUME 0x8
-#define ARM_SMMU_CB_TTBCR2 0x10
+#define RESUME_TERMINATE BIT(0)
+
+#define ARM_SMMU_CB_TCR2 0x10
+#define TCR2_SEP GENMASK(17, 15)
+#define TCR2_SEP_UPSTREAM 0x7
+#define TCR2_AS BIT(4)
+
#define ARM_SMMU_CB_TTBR0 0x20
#define ARM_SMMU_CB_TTBR1 0x28
-#define ARM_SMMU_CB_TTBCR 0x30
+#define TTBRn_ASID GENMASK_ULL(63, 48)
+
+#define ARM_SMMU_CB_TCR 0x30
#define ARM_SMMU_CB_CONTEXTIDR 0x34
#define ARM_SMMU_CB_S1_MAIR0 0x38
#define ARM_SMMU_CB_S1_MAIR1 0x3c
+
#define ARM_SMMU_CB_PAR 0x50
+#define CB_PAR_F BIT(0)
+
#define ARM_SMMU_CB_FSR 0x58
+#define FSR_MULTI BIT(31)
+#define FSR_SS BIT(30)
+#define FSR_UUT BIT(8)
+#define FSR_ASF BIT(7)
+#define FSR_TLBLKF BIT(6)
+#define FSR_TLBMCF BIT(5)
+#define FSR_EF BIT(4)
+#define FSR_PF BIT(3)
+#define FSR_AFF BIT(2)
+#define FSR_TF BIT(1)
+
+#define FSR_IGN (FSR_AFF | FSR_ASF | \
+ FSR_TLBMCF | FSR_TLBLKF)
+#define FSR_FAULT (FSR_MULTI | FSR_SS | FSR_UUT | \
+ FSR_EF | FSR_PF | FSR_TF | FSR_IGN)
+
#define ARM_SMMU_CB_FAR 0x60
+
#define ARM_SMMU_CB_FSYNR0 0x68
+#define FSYNR0_WNR BIT(4)
+
#define ARM_SMMU_CB_S1_TLBIVA 0x600
#define ARM_SMMU_CB_S1_TLBIASID 0x610
#define ARM_SMMU_CB_S1_TLBIVAL 0x620
@@ -150,46 +190,8 @@ enum arm_smmu_cbar_type {
#define ARM_SMMU_CB_TLBSYNC 0x7f0
#define ARM_SMMU_CB_TLBSTATUS 0x7f4
#define ARM_SMMU_CB_ATS1PR 0x800
+
#define ARM_SMMU_CB_ATSR 0x8f0
-
-#define SCTLR_S1_ASIDPNE (1 << 12)
-#define SCTLR_CFCFG (1 << 7)
-#define SCTLR_CFIE (1 << 6)
-#define SCTLR_CFRE (1 << 5)
-#define SCTLR_E (1 << 4)
-#define SCTLR_AFE (1 << 2)
-#define SCTLR_TRE (1 << 1)
-#define SCTLR_M (1 << 0)
-
-#define CB_PAR_F (1 << 0)
-
-#define ATSR_ACTIVE (1 << 0)
-
-#define RESUME_RETRY (0 << 0)
-#define RESUME_TERMINATE (1 << 0)
-
-#define TTBCR2_SEP_SHIFT 15
-#define TTBCR2_SEP_UPSTREAM (0x7 << TTBCR2_SEP_SHIFT)
-#define TTBCR2_AS (1 << 4)
-
-#define TTBRn_ASID_SHIFT 48
-
-#define FSR_MULTI (1 << 31)
-#define FSR_SS (1 << 30)
-#define FSR_UUT (1 << 8)
-#define FSR_ASF (1 << 7)
-#define FSR_TLBLKF (1 << 6)
-#define FSR_TLBMCF (1 << 5)
-#define FSR_EF (1 << 4)
-#define FSR_PF (1 << 3)
-#define FSR_AFF (1 << 2)
-#define FSR_TF (1 << 1)
-
-#define FSR_IGN (FSR_AFF | FSR_ASF | \
- FSR_TLBMCF | FSR_TLBLKF)
-#define FSR_FAULT (FSR_MULTI | FSR_SS | FSR_UUT | \
- FSR_EF | FSR_PF | FSR_TF | FSR_IGN)
-
-#define FSYNR0_WNR (1 << 4)
+#define ATSR_ACTIVE BIT(0)
#endif /* _ARM_SMMU_REGS_H */
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 515fb1ce39ed..d9a93e5f422f 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -628,16 +628,16 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
cb->cfg = cfg;
- /* TTBCR */
+ /* TCR */
if (stage1) {
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_S) {
cb->tcr[0] = pgtbl_cfg->arm_v7s_cfg.tcr;
} else {
cb->tcr[0] = pgtbl_cfg->arm_lpae_s1_cfg.tcr;
cb->tcr[1] = pgtbl_cfg->arm_lpae_s1_cfg.tcr >> 32;
- cb->tcr[1] |= TTBCR2_SEP_UPSTREAM;
+ cb->tcr[1] |= FIELD_PREP(TCR2_SEP, TCR2_SEP_UPSTREAM);
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
- cb->tcr[1] |= TTBCR2_AS;
+ cb->tcr[1] |= TCR2_AS;
}
} else {
cb->tcr[0] = pgtbl_cfg->arm_lpae_s2_cfg.vtcr;
@@ -650,9 +650,9 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
cb->ttbr[1] = pgtbl_cfg->arm_v7s_cfg.ttbr[1];
} else {
cb->ttbr[0] = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[0];
- cb->ttbr[0] |= (u64)cfg->asid << TTBRn_ASID_SHIFT;
+ cb->ttbr[0] |= FIELD_PREP(TTBRn_ASID, cfg->asid);
cb->ttbr[1] = pgtbl_cfg->arm_lpae_s1_cfg.ttbr[1];
- cb->ttbr[1] |= (u64)cfg->asid << TTBRn_ASID_SHIFT;
+ cb->ttbr[1] |= FIELD_PREP(TTBRn_ASID, cfg->asid);
}
} else {
cb->ttbr[0] = pgtbl_cfg->arm_lpae_s2_cfg.vttbr;
@@ -721,13 +721,13 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
writel_relaxed(reg, gr1_base + ARM_SMMU_GR1_CBAR(idx));
/*
- * TTBCR
+ * TCR
* We must write this before the TTBRs, since it determines the
* access behaviour of some fields (in particular, ASID[15:8]).
*/
if (stage1 && smmu->version > ARM_SMMU_V1)
- writel_relaxed(cb->tcr[1], cb_base + ARM_SMMU_CB_TTBCR2);
- writel_relaxed(cb->tcr[0], cb_base + ARM_SMMU_CB_TTBCR);
+ writel_relaxed(cb->tcr[1], cb_base + ARM_SMMU_CB_TCR2);
+ writel_relaxed(cb->tcr[0], cb_base + ARM_SMMU_CB_TCR);
/* TTBRs */
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_S) {
diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c
index 34d0b9783b3e..746bf2a7df05 100644
--- a/drivers/iommu/qcom_iommu.c
+++ b/drivers/iommu/qcom_iommu.c
@@ -7,6 +7,7 @@
*/
#include <linux/atomic.h>
+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma-iommu.h>
@@ -247,16 +248,16 @@ static int qcom_iommu_init_domain(struct iommu_domain *domain,
/* TTBRs */
iommu_writeq(ctx, ARM_SMMU_CB_TTBR0,
pgtbl_cfg.arm_lpae_s1_cfg.ttbr[0] |
- ((u64)ctx->asid << TTBRn_ASID_SHIFT));
+ FIELD_PREP(TTBRn_ASID, ctx->asid));
iommu_writeq(ctx, ARM_SMMU_CB_TTBR1,
pgtbl_cfg.arm_lpae_s1_cfg.ttbr[1] |
- ((u64)ctx->asid << TTBRn_ASID_SHIFT));
+ FIELD_PREP(TTBRn_ASID, ctx->asid));
- /* TTBCR */
- iommu_writel(ctx, ARM_SMMU_CB_TTBCR2,
+ /* TCR */
+ iommu_writel(ctx, ARM_SMMU_CB_TCR2,
(pgtbl_cfg.arm_lpae_s1_cfg.tcr >> 32) |
- TTBCR2_SEP_UPSTREAM);
- iommu_writel(ctx, ARM_SMMU_CB_TTBCR,
+ FIELD_PREP(TCR2_SEP, TCR2_SEP_UPSTREAM));
+ iommu_writel(ctx, ARM_SMMU_CB_TCR,
pgtbl_cfg.arm_lpae_s1_cfg.tcr);
/* MAIRs (stage-1 only) */
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 04/15] iommu/arm-smmu: Rework cb_base handling
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (2 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 03/15] iommu/arm-smmu: Convert context bank " Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-14 18:05 ` Will Deacon
2019-08-09 17:07 ` [PATCH 05/15] iommu/arm-smmu: Split arm_smmu_tlb_inv_range_nosync() Robin Murphy
` (12 subsequent siblings)
16 siblings, 1 reply; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
To keep register-access quirks manageable, we want to structure things
to avoid needing too many individual overrides. It seems fairly clean to
have a single interface which handles both global and context registers
in terms of the architectural pages, so the first preparatory step is to
rework cb_base into a page number rather than an absolute address.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index d9a93e5f422f..463bc8d98adb 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -95,7 +95,7 @@
#endif
/* Translation context bank */
-#define ARM_SMMU_CB(smmu, n) ((smmu)->cb_base + ((n) << (smmu)->pgshift))
+#define ARM_SMMU_CB(smmu, n) ((smmu)->base + (((smmu)->cb_base + (n)) << (smmu)->pgshift))
#define MSI_IOVA_BASE 0x8000000
#define MSI_IOVA_LENGTH 0x100000
@@ -168,8 +168,8 @@ struct arm_smmu_device {
struct device *dev;
void __iomem *base;
- void __iomem *cb_base;
- unsigned long pgshift;
+ unsigned int cb_base;
+ unsigned int pgshift;
#define ARM_SMMU_FEAT_COHERENT_WALK (1 << 0)
#define ARM_SMMU_FEAT_STREAM_MATCH (1 << 1)
@@ -1815,7 +1815,7 @@ static int arm_smmu_id_size_to_bits(int size)
static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
{
- unsigned long size;
+ unsigned int size;
void __iomem *gr0_base = ARM_SMMU_GR0(smmu);
u32 id;
bool cttw_reg, cttw_fw = smmu->features & ARM_SMMU_FEAT_COHERENT_WALK;
@@ -1899,7 +1899,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
return -ENOMEM;
dev_notice(smmu->dev,
- "\tstream matching with %lu register groups", size);
+ "\tstream matching with %u register groups", size);
}
/* s2cr->type == 0 means translation, so initialise explicitly */
smmu->s2crs = devm_kmalloc_array(smmu->dev, size, sizeof(*smmu->s2crs),
@@ -1925,11 +1925,12 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
/* Check for size mismatch of SMMU address space from mapped region */
size = 1 << (FIELD_GET(ID1_NUMPAGENDXB, id) + 1);
- size <<= smmu->pgshift;
- if (smmu->cb_base != gr0_base + size)
+ if (smmu->cb_base != 2 * size << smmu->pgshift)
dev_warn(smmu->dev,
- "SMMU address space size (0x%lx) differs from mapped region size (0x%tx)!\n",
- size * 2, (smmu->cb_base - gr0_base) * 2);
+ "SMMU address space size (0x%x) differs from mapped region size (0x%x)!\n",
+ 2 * size << smmu->pgshift, smmu->cb_base);
+ /* Now cb_base can reach its final form: a page number */
+ smmu->cb_base = size;
smmu->num_s2_context_banks = FIELD_GET(ID1_NUMS2CB, id);
smmu->num_context_banks = FIELD_GET(ID1_NUMCB, id);
@@ -2200,7 +2201,8 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
smmu->base = devm_ioremap_resource(dev, res);
if (IS_ERR(smmu->base))
return PTR_ERR(smmu->base);
- smmu->cb_base = smmu->base + resource_size(res) / 2;
+ /* We'll finish calculating this later once we know the page size */
+ smmu->cb_base = resource_size(res);
num_irqs = 0;
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, num_irqs))) {
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* Re: [PATCH 04/15] iommu/arm-smmu: Rework cb_base handling
2019-08-09 17:07 ` [PATCH 04/15] iommu/arm-smmu: Rework cb_base handling Robin Murphy
@ 2019-08-14 18:05 ` Will Deacon
2019-08-15 11:14 ` Robin Murphy
0 siblings, 1 reply; 30+ messages in thread
From: Will Deacon @ 2019-08-14 18:05 UTC (permalink / raw)
To: Robin Murphy; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On Fri, Aug 09, 2019 at 06:07:41PM +0100, Robin Murphy wrote:
> To keep register-access quirks manageable, we want to structure things
> to avoid needing too many individual overrides. It seems fairly clean to
> have a single interface which handles both global and context registers
> in terms of the architectural pages, so the first preparatory step is to
> rework cb_base into a page number rather than an absolute address.
>
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
> drivers/iommu/arm-smmu.c | 22 ++++++++++++----------
> 1 file changed, 12 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
> index d9a93e5f422f..463bc8d98adb 100644
> --- a/drivers/iommu/arm-smmu.c
> +++ b/drivers/iommu/arm-smmu.c
> @@ -95,7 +95,7 @@
> #endif
>
> /* Translation context bank */
> -#define ARM_SMMU_CB(smmu, n) ((smmu)->cb_base + ((n) << (smmu)->pgshift))
> +#define ARM_SMMU_CB(smmu, n) ((smmu)->base + (((smmu)->cb_base + (n)) << (smmu)->pgshift))
>
> #define MSI_IOVA_BASE 0x8000000
> #define MSI_IOVA_LENGTH 0x100000
> @@ -168,8 +168,8 @@ struct arm_smmu_device {
> struct device *dev;
>
> void __iomem *base;
> - void __iomem *cb_base;
> - unsigned long pgshift;
> + unsigned int cb_base;
I think this is now a misnomer. Would you be able to rename it cb_pfn or
something, please?
Otherwise, this seems fine.
Will
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread* Re: [PATCH 04/15] iommu/arm-smmu: Rework cb_base handling
2019-08-14 18:05 ` Will Deacon
@ 2019-08-15 11:14 ` Robin Murphy
0 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-15 11:14 UTC (permalink / raw)
To: Will Deacon; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On 14/08/2019 19:05, Will Deacon wrote:
> On Fri, Aug 09, 2019 at 06:07:41PM +0100, Robin Murphy wrote:
>> To keep register-access quirks manageable, we want to structure things
>> to avoid needing too many individual overrides. It seems fairly clean to
>> have a single interface which handles both global and context registers
>> in terms of the architectural pages, so the first preparatory step is to
>> rework cb_base into a page number rather than an absolute address.
>>
>> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
>> ---
>> drivers/iommu/arm-smmu.c | 22 ++++++++++++----------
>> 1 file changed, 12 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
>> index d9a93e5f422f..463bc8d98adb 100644
>> --- a/drivers/iommu/arm-smmu.c
>> +++ b/drivers/iommu/arm-smmu.c
>> @@ -95,7 +95,7 @@
>> #endif
>>
>> /* Translation context bank */
>> -#define ARM_SMMU_CB(smmu, n) ((smmu)->cb_base + ((n) << (smmu)->pgshift))
>> +#define ARM_SMMU_CB(smmu, n) ((smmu)->base + (((smmu)->cb_base + (n)) << (smmu)->pgshift))
>>
>> #define MSI_IOVA_BASE 0x8000000
>> #define MSI_IOVA_LENGTH 0x100000
>> @@ -168,8 +168,8 @@ struct arm_smmu_device {
>> struct device *dev;
>>
>> void __iomem *base;
>> - void __iomem *cb_base;
>> - unsigned long pgshift;
>> + unsigned int cb_base;
>
> I think this is now a misnomer. Would you be able to rename it cb_pfn or
> something, please?
Good point; in the architectural terms (section 8.1 of the spec),
SMMU_CB_BASE is strictly a byte offset from SMMU_BASE, and the quantity
we now have here is actually NUMPAGE. I've renamed it as such and
tweaked the comments to be a bit more useful too.
Robin.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH 05/15] iommu/arm-smmu: Split arm_smmu_tlb_inv_range_nosync()
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (3 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 04/15] iommu/arm-smmu: Rework cb_base handling Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-15 10:56 ` Will Deacon
2019-08-09 17:07 ` [PATCH 06/15] iommu/arm-smmu: Get rid of weird "atomic" write Robin Murphy
` (11 subsequent siblings)
16 siblings, 1 reply; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Since we now use separate iommu_gather_ops for stage 1 and stage 2
contexts, we may as well divide up the monolithic callback into its
respective stage 1 and stage 2 parts.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu.c | 66 ++++++++++++++++++++++------------------
1 file changed, 37 insertions(+), 29 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 463bc8d98adb..a681e000e704 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -490,46 +490,54 @@ static void arm_smmu_tlb_inv_context_s2(void *cookie)
arm_smmu_tlb_sync_global(smmu);
}
-static void arm_smmu_tlb_inv_range_nosync(unsigned long iova, size_t size,
- size_t granule, bool leaf, void *cookie)
+static void arm_smmu_tlb_inv_range_s1(unsigned long iova, size_t size,
+ size_t granule, bool leaf, void *cookie)
{
struct arm_smmu_domain *smmu_domain = cookie;
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
- bool stage1 = cfg->cbar != CBAR_TYPE_S2_TRANS;
- void __iomem *reg = ARM_SMMU_CB(smmu_domain->smmu, cfg->cbndx);
+ void __iomem *reg = ARM_SMMU_CB(smmu, cfg->cbndx);
- if (smmu_domain->smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
+ if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
wmb();
- if (stage1) {
- reg += leaf ? ARM_SMMU_CB_S1_TLBIVAL : ARM_SMMU_CB_S1_TLBIVA;
+ reg += leaf ? ARM_SMMU_CB_S1_TLBIVAL : ARM_SMMU_CB_S1_TLBIVA;
- if (cfg->fmt != ARM_SMMU_CTX_FMT_AARCH64) {
- iova &= ~12UL;
- iova |= cfg->asid;
- do {
- writel_relaxed(iova, reg);
- iova += granule;
- } while (size -= granule);
- } else {
- iova >>= 12;
- iova |= (u64)cfg->asid << 48;
- do {
- writeq_relaxed(iova, reg);
- iova += granule >> 12;
- } while (size -= granule);
- }
- } else {
- reg += leaf ? ARM_SMMU_CB_S2_TLBIIPAS2L :
- ARM_SMMU_CB_S2_TLBIIPAS2;
- iova >>= 12;
+ if (cfg->fmt != ARM_SMMU_CTX_FMT_AARCH64) {
+ iova &= ~12UL;
+ iova |= cfg->asid;
do {
- smmu_write_atomic_lq(iova, reg);
+ writel_relaxed(iova, reg);
+ iova += granule;
+ } while (size -= granule);
+ } else {
+ iova >>= 12;
+ iova |= (u64)cfg->asid << 48;
+ do {
+ writeq_relaxed(iova, reg);
iova += granule >> 12;
} while (size -= granule);
}
}
+static void arm_smmu_tlb_inv_range_s2(unsigned long iova, size_t size,
+ size_t granule, bool leaf, void *cookie)
+{
+ struct arm_smmu_domain *smmu_domain = cookie;
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
+ void __iomem *reg = ARM_SMMU_CB(smmu, smmu_domain->cfg.cbndx);
+
+ if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
+ wmb();
+
+ reg += leaf ? ARM_SMMU_CB_S2_TLBIIPAS2L : ARM_SMMU_CB_S2_TLBIIPAS2;
+ iova >>= 12;
+ do {
+ smmu_write_atomic_lq(iova, reg);
+ iova += granule >> 12;
+ } while (size -= granule);
+}
+
/*
* On MMU-401 at least, the cost of firing off multiple TLBIVMIDs appears
* almost negligible, but the benefit of getting the first one in as far ahead
@@ -550,13 +558,13 @@ static void arm_smmu_tlb_inv_vmid_nosync(unsigned long iova, size_t size,
static const struct iommu_gather_ops arm_smmu_s1_tlb_ops = {
.tlb_flush_all = arm_smmu_tlb_inv_context_s1,
- .tlb_add_flush = arm_smmu_tlb_inv_range_nosync,
+ .tlb_add_flush = arm_smmu_tlb_inv_range_s1,
.tlb_sync = arm_smmu_tlb_sync_context,
};
static const struct iommu_gather_ops arm_smmu_s2_tlb_ops_v2 = {
.tlb_flush_all = arm_smmu_tlb_inv_context_s2,
- .tlb_add_flush = arm_smmu_tlb_inv_range_nosync,
+ .tlb_add_flush = arm_smmu_tlb_inv_range_s2,
.tlb_sync = arm_smmu_tlb_sync_context,
};
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* Re: [PATCH 05/15] iommu/arm-smmu: Split arm_smmu_tlb_inv_range_nosync()
2019-08-09 17:07 ` [PATCH 05/15] iommu/arm-smmu: Split arm_smmu_tlb_inv_range_nosync() Robin Murphy
@ 2019-08-15 10:56 ` Will Deacon
2019-08-15 11:22 ` Robin Murphy
0 siblings, 1 reply; 30+ messages in thread
From: Will Deacon @ 2019-08-15 10:56 UTC (permalink / raw)
To: Robin Murphy; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On Fri, Aug 09, 2019 at 06:07:42PM +0100, Robin Murphy wrote:
> Since we now use separate iommu_gather_ops for stage 1 and stage 2
> contexts, we may as well divide up the monolithic callback into its
> respective stage 1 and stage 2 parts.
>
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
> drivers/iommu/arm-smmu.c | 66 ++++++++++++++++++++++------------------
> 1 file changed, 37 insertions(+), 29 deletions(-)
This will conflict with my iommu API batching stuff, but I can sort that
out if/when it gets queued by Joerg.
> - if (cfg->fmt != ARM_SMMU_CTX_FMT_AARCH64) {
> - iova &= ~12UL;
> - iova |= cfg->asid;
> - do {
> - writel_relaxed(iova, reg);
> - iova += granule;
> - } while (size -= granule);
> - } else {
> - iova >>= 12;
> - iova |= (u64)cfg->asid << 48;
> - do {
> - writeq_relaxed(iova, reg);
> - iova += granule >> 12;
> - } while (size -= granule);
> - }
> - } else {
> - reg += leaf ? ARM_SMMU_CB_S2_TLBIIPAS2L :
> - ARM_SMMU_CB_S2_TLBIIPAS2;
> - iova >>= 12;
> + if (cfg->fmt != ARM_SMMU_CTX_FMT_AARCH64) {
> + iova &= ~12UL;
Oh baby. You should move code around more often, so I'm forced to take a
second look!
Can you cook a fix for this that we can route separately, please? I see
it also made its way into qcom_iommu.c...
Will
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread* Re: [PATCH 05/15] iommu/arm-smmu: Split arm_smmu_tlb_inv_range_nosync()
2019-08-15 10:56 ` Will Deacon
@ 2019-08-15 11:22 ` Robin Murphy
0 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-15 11:22 UTC (permalink / raw)
To: Will Deacon; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On 15/08/2019 11:56, Will Deacon wrote:
> On Fri, Aug 09, 2019 at 06:07:42PM +0100, Robin Murphy wrote:
>> Since we now use separate iommu_gather_ops for stage 1 and stage 2
>> contexts, we may as well divide up the monolithic callback into its
>> respective stage 1 and stage 2 parts.
>>
>> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
>> ---
>> drivers/iommu/arm-smmu.c | 66 ++++++++++++++++++++++------------------
>> 1 file changed, 37 insertions(+), 29 deletions(-)
>
> This will conflict with my iommu API batching stuff, but I can sort that
> out if/when it gets queued by Joerg.
>
>> - if (cfg->fmt != ARM_SMMU_CTX_FMT_AARCH64) {
>> - iova &= ~12UL;
>> - iova |= cfg->asid;
>> - do {
>> - writel_relaxed(iova, reg);
>> - iova += granule;
>> - } while (size -= granule);
>> - } else {
>> - iova >>= 12;
>> - iova |= (u64)cfg->asid << 48;
>> - do {
>> - writeq_relaxed(iova, reg);
>> - iova += granule >> 12;
>> - } while (size -= granule);
>> - }
>> - } else {
>> - reg += leaf ? ARM_SMMU_CB_S2_TLBIIPAS2L :
>> - ARM_SMMU_CB_S2_TLBIIPAS2;
>> - iova >>= 12;
>> + if (cfg->fmt != ARM_SMMU_CTX_FMT_AARCH64) {
>> + iova &= ~12UL;
>
> Oh baby. You should move code around more often, so I'm forced to take a
> second look!
Oh dear lord... The worst part is that I do now remember seeing this and
having a similar moment of disbelief, but apparently I was easily
distracted with rebasing and forgot about it too quickly :(
> Can you cook a fix for this that we can route separately, please? I see
> it also made its way into qcom_iommu.c...
Sure, I'll split it out to the front of the series for the moment.
Robin.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH 06/15] iommu/arm-smmu: Get rid of weird "atomic" write
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (4 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 05/15] iommu/arm-smmu: Split arm_smmu_tlb_inv_range_nosync() Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 07/15] iommu/arm-smmu: Abstract GR1 accesses Robin Murphy
` (10 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
The smmu_write_atomic_lq oddity made some sense when the context
format was effectively tied to CONFIG_64BIT, but these days it's
simpler to just pick an explicit access size based on the format
for the one-and-a-half times we actually care.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu.c | 23 +++++++----------------
1 file changed, 7 insertions(+), 16 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index a681e000e704..544c992cf586 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -83,17 +83,6 @@
((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \
? 0x400 : 0))
-/*
- * Some 64-bit registers only make sense to write atomically, but in such
- * cases all the data relevant to AArch32 formats lies within the lower word,
- * therefore this actually makes more sense than it might first appear.
- */
-#ifdef CONFIG_64BIT
-#define smmu_write_atomic_lq writeq_relaxed
-#else
-#define smmu_write_atomic_lq writel_relaxed
-#endif
-
/* Translation context bank */
#define ARM_SMMU_CB(smmu, n) ((smmu)->base + (((smmu)->cb_base + (n)) << (smmu)->pgshift))
@@ -533,7 +522,10 @@ static void arm_smmu_tlb_inv_range_s2(unsigned long iova, size_t size,
reg += leaf ? ARM_SMMU_CB_S2_TLBIIPAS2L : ARM_SMMU_CB_S2_TLBIIPAS2;
iova >>= 12;
do {
- smmu_write_atomic_lq(iova, reg);
+ if (smmu_domain->cfg.fmt == ARM_SMMU_CTX_FMT_AARCH64)
+ writeq_relaxed(iova, reg);
+ else
+ writel_relaxed(iova, reg);
iova += granule >> 12;
} while (size -= granule);
}
@@ -1371,11 +1363,10 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
cb_base = ARM_SMMU_CB(smmu, cfg->cbndx);
spin_lock_irqsave(&smmu_domain->cb_lock, flags);
- /* ATS1 registers can only be written atomically */
va = iova & ~0xfffUL;
- if (smmu->version == ARM_SMMU_V2)
- smmu_write_atomic_lq(va, cb_base + ARM_SMMU_CB_ATS1PR);
- else /* Register is only 32-bit in v1 */
+ if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
+ writeq_relaxed(va, cb_base + ARM_SMMU_CB_ATS1PR);
+ else
writel_relaxed(va, cb_base + ARM_SMMU_CB_ATS1PR);
if (readl_poll_timeout_atomic(cb_base + ARM_SMMU_CB_ATSR, tmp,
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 07/15] iommu/arm-smmu: Abstract GR1 accesses
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (5 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 06/15] iommu/arm-smmu: Get rid of weird "atomic" write Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 08/15] iommu/arm-smmu: Abstract context bank accesses Robin Murphy
` (9 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Introduce some register access abstractions which we will later use to
encapsulate various quirks. GR1 is the easiest page to start with.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu.c | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 544c992cf586..72505647b77d 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -71,7 +71,6 @@
/* SMMU global address space */
#define ARM_SMMU_GR0(smmu) ((smmu)->base)
-#define ARM_SMMU_GR1(smmu) ((smmu)->base + (1 << (smmu)->pgshift))
/*
* SMMU global address space with conditional offset to access secure
@@ -250,6 +249,25 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
+static void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
+{
+ return smmu->base + (n << smmu->pgshift);
+}
+
+static u32 arm_smmu_readl(struct arm_smmu_device *smmu, int page, int offset)
+{
+ return readl_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static void arm_smmu_writel(struct arm_smmu_device *smmu, int page, int offset,
+ u32 val)
+{
+ writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
+#define arm_smmu_read_gr1(s, r) arm_smmu_readl((s), 1, (r))
+#define arm_smmu_write_gr1(s, r, v) arm_smmu_writel((s), 1, (r), (v))
+
struct arm_smmu_option_prop {
u32 opt;
const char *prop;
@@ -574,7 +592,6 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
struct arm_smmu_device *smmu = smmu_domain->smmu;
- void __iomem *gr1_base = ARM_SMMU_GR1(smmu);
void __iomem *cb_base;
cb_base = ARM_SMMU_CB(smmu, cfg->cbndx);
@@ -585,7 +602,7 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
fsynr = readl_relaxed(cb_base + ARM_SMMU_CB_FSYNR0);
iova = readq_relaxed(cb_base + ARM_SMMU_CB_FAR);
- cbfrsynra = readl_relaxed(gr1_base + ARM_SMMU_GR1_CBFRSYNRA(cfg->cbndx));
+ cbfrsynra = arm_smmu_read_gr1(smmu, ARM_SMMU_GR1_CBFRSYNRA(cfg->cbndx));
dev_err_ratelimited(smmu->dev,
"Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
@@ -676,7 +693,7 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
bool stage1;
struct arm_smmu_cb *cb = &smmu->cbs[idx];
struct arm_smmu_cfg *cfg = cb->cfg;
- void __iomem *cb_base, *gr1_base;
+ void __iomem *cb_base;
cb_base = ARM_SMMU_CB(smmu, idx);
@@ -686,7 +703,6 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
return;
}
- gr1_base = ARM_SMMU_GR1(smmu);
stage1 = cfg->cbar != CBAR_TYPE_S2_TRANS;
/* CBA2R */
@@ -699,7 +715,7 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
if (smmu->features & ARM_SMMU_FEAT_VMID16)
reg |= FIELD_PREP(CBA2R_VMID16, cfg->vmid);
- writel_relaxed(reg, gr1_base + ARM_SMMU_GR1_CBA2R(idx));
+ arm_smmu_write_gr1(smmu, ARM_SMMU_GR1_CBA2R(idx), reg);
}
/* CBAR */
@@ -718,7 +734,7 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
/* 8-bit VMIDs live in CBAR */
reg |= FIELD_PREP(CBAR_VMID, cfg->vmid);
}
- writel_relaxed(reg, gr1_base + ARM_SMMU_GR1_CBAR(idx));
+ arm_smmu_write_gr1(smmu, ARM_SMMU_GR1_CBAR(idx), reg);
/*
* TCR
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 08/15] iommu/arm-smmu: Abstract context bank accesses
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (6 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 07/15] iommu/arm-smmu: Abstract GR1 accesses Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-15 10:56 ` Will Deacon
2019-08-09 17:07 ` [PATCH 09/15] iommu/arm-smmu: Abstract GR0 accesses Robin Murphy
` (8 subsequent siblings)
16 siblings, 1 reply; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Context bank accesses are fiddly enough to deserve a number of extra
helpers to keep the callsites looking sane, even though there are only
one or two of each.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu.c | 137 ++++++++++++++++++++-------------------
1 file changed, 72 insertions(+), 65 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 72505647b77d..abdcc3f52e2e 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -82,9 +82,6 @@
((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \
? 0x400 : 0))
-/* Translation context bank */
-#define ARM_SMMU_CB(smmu, n) ((smmu)->base + (((smmu)->cb_base + (n)) << (smmu)->pgshift))
-
#define MSI_IOVA_BASE 0x8000000
#define MSI_IOVA_LENGTH 0x100000
@@ -265,9 +262,29 @@ static void arm_smmu_writel(struct arm_smmu_device *smmu, int page, int offset,
writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
}
+static u64 arm_smmu_readq(struct arm_smmu_device *smmu, int page, int offset)
+{
+ return readq_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, int offset,
+ u64 val)
+{
+ writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
#define arm_smmu_read_gr1(s, r) arm_smmu_readl((s), 1, (r))
#define arm_smmu_write_gr1(s, r, v) arm_smmu_writel((s), 1, (r), (v))
+#define arm_smmu_read_cb(s, n, r) \
+ arm_smmu_readl((s), (s)->cb_base + (n), (r))
+#define arm_smmu_write_cb(s, n, r, v) \
+ arm_smmu_writel((s), (s)->cb_base + (n), (r), (v))
+#define arm_smmu_read_cb_q(s, n, r) \
+ arm_smmu_readq((s), (s)->cb_base + (n), (r))
+#define arm_smmu_write_cb_q(s, n, r, v) \
+ arm_smmu_writeq((s), (s)->cb_base + (n), (r), (v))
+
struct arm_smmu_option_prop {
u32 opt;
const char *prop;
@@ -423,15 +440,17 @@ static void __arm_smmu_free_bitmap(unsigned long *map, int idx)
}
/* Wait for any pending TLB invalidations to complete */
-static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu,
- void __iomem *sync, void __iomem *status)
+static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu, int page,
+ int sync, int status)
{
unsigned int spin_cnt, delay;
+ u32 reg;
- writel_relaxed(QCOM_DUMMY_VAL, sync);
+ arm_smmu_writel(smmu, page, sync, QCOM_DUMMY_VAL);
for (delay = 1; delay < TLB_LOOP_TIMEOUT; delay *= 2) {
for (spin_cnt = TLB_SPIN_COUNT; spin_cnt > 0; spin_cnt--) {
- if (!(readl_relaxed(status) & sTLBGSTATUS_GSACTIVE))
+ reg = arm_smmu_readl(smmu, page, status);
+ if (!(reg & sTLBGSTATUS_GSACTIVE))
return;
cpu_relax();
}
@@ -443,12 +462,11 @@ static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu,
static void arm_smmu_tlb_sync_global(struct arm_smmu_device *smmu)
{
- void __iomem *base = ARM_SMMU_GR0(smmu);
unsigned long flags;
spin_lock_irqsave(&smmu->global_sync_lock, flags);
- __arm_smmu_tlb_sync(smmu, base + ARM_SMMU_GR0_sTLBGSYNC,
- base + ARM_SMMU_GR0_sTLBGSTATUS);
+ __arm_smmu_tlb_sync(smmu, 0, ARM_SMMU_GR0_sTLBGSYNC,
+ ARM_SMMU_GR0_sTLBGSTATUS);
spin_unlock_irqrestore(&smmu->global_sync_lock, flags);
}
@@ -456,12 +474,11 @@ static void arm_smmu_tlb_sync_context(void *cookie)
{
struct arm_smmu_domain *smmu_domain = cookie;
struct arm_smmu_device *smmu = smmu_domain->smmu;
- void __iomem *base = ARM_SMMU_CB(smmu, smmu_domain->cfg.cbndx);
unsigned long flags;
spin_lock_irqsave(&smmu_domain->cb_lock, flags);
- __arm_smmu_tlb_sync(smmu, base + ARM_SMMU_CB_TLBSYNC,
- base + ARM_SMMU_CB_TLBSTATUS);
+ __arm_smmu_tlb_sync(smmu, smmu->cb_base + smmu_domain->cfg.cbndx,
+ ARM_SMMU_CB_TLBSYNC, ARM_SMMU_CB_TLBSTATUS);
spin_unlock_irqrestore(&smmu_domain->cb_lock, flags);
}
@@ -475,14 +492,13 @@ static void arm_smmu_tlb_sync_vmid(void *cookie)
static void arm_smmu_tlb_inv_context_s1(void *cookie)
{
struct arm_smmu_domain *smmu_domain = cookie;
- struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
- void __iomem *base = ARM_SMMU_CB(smmu_domain->smmu, cfg->cbndx);
-
/*
- * NOTE: this is not a relaxed write; it needs to guarantee that PTEs
- * cleared by the current CPU are visible to the SMMU before the TLBI.
+ * The TLBI write may be relaxed, so ensure that PTEs cleared by the
+ * current CPU are visible beforehand.
*/
- writel(cfg->asid, base + ARM_SMMU_CB_S1_TLBIASID);
+ wmb();
+ arm_smmu_write_cb(smmu_domain->smmu, smmu_domain->cfg.cbndx,
+ ARM_SMMU_CB_S1_TLBIASID, smmu_domain->cfg.asid);
arm_smmu_tlb_sync_context(cookie);
}
@@ -503,25 +519,25 @@ static void arm_smmu_tlb_inv_range_s1(unsigned long iova, size_t size,
struct arm_smmu_domain *smmu_domain = cookie;
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
- void __iomem *reg = ARM_SMMU_CB(smmu, cfg->cbndx);
+ int reg, idx = cfg->cbndx;
if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
wmb();
- reg += leaf ? ARM_SMMU_CB_S1_TLBIVAL : ARM_SMMU_CB_S1_TLBIVA;
+ reg = leaf ? ARM_SMMU_CB_S1_TLBIVAL : ARM_SMMU_CB_S1_TLBIVA;
if (cfg->fmt != ARM_SMMU_CTX_FMT_AARCH64) {
iova &= ~12UL;
iova |= cfg->asid;
do {
- writel_relaxed(iova, reg);
+ arm_smmu_write_cb(smmu, idx, reg, iova);
iova += granule;
} while (size -= granule);
} else {
iova >>= 12;
iova |= (u64)cfg->asid << 48;
do {
- writeq_relaxed(iova, reg);
+ arm_smmu_write_cb_q(smmu, idx, reg, iova);
iova += granule >> 12;
} while (size -= granule);
}
@@ -532,18 +548,18 @@ static void arm_smmu_tlb_inv_range_s2(unsigned long iova, size_t size,
{
struct arm_smmu_domain *smmu_domain = cookie;
struct arm_smmu_device *smmu = smmu_domain->smmu;
- void __iomem *reg = ARM_SMMU_CB(smmu, smmu_domain->cfg.cbndx);
+ int reg, idx = smmu_domain->cfg.cbndx;
if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
wmb();
- reg += leaf ? ARM_SMMU_CB_S2_TLBIIPAS2L : ARM_SMMU_CB_S2_TLBIIPAS2;
+ reg = leaf ? ARM_SMMU_CB_S2_TLBIIPAS2L : ARM_SMMU_CB_S2_TLBIIPAS2;
iova >>= 12;
do {
if (smmu_domain->cfg.fmt == ARM_SMMU_CTX_FMT_AARCH64)
- writeq_relaxed(iova, reg);
+ arm_smmu_write_cb_q(smmu, idx, reg, iova);
else
- writel_relaxed(iova, reg);
+ arm_smmu_write_cb(smmu, idx, reg, iova);
iova += granule >> 12;
} while (size -= granule);
}
@@ -590,25 +606,22 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
unsigned long iova;
struct iommu_domain *domain = dev;
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
- struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
struct arm_smmu_device *smmu = smmu_domain->smmu;
- void __iomem *cb_base;
-
- cb_base = ARM_SMMU_CB(smmu, cfg->cbndx);
- fsr = readl_relaxed(cb_base + ARM_SMMU_CB_FSR);
+ int idx = smmu_domain->cfg.cbndx;
+ fsr = arm_smmu_read_cb(smmu, idx, ARM_SMMU_CB_FSR);
if (!(fsr & FSR_FAULT))
return IRQ_NONE;
- fsynr = readl_relaxed(cb_base + ARM_SMMU_CB_FSYNR0);
- iova = readq_relaxed(cb_base + ARM_SMMU_CB_FAR);
- cbfrsynra = arm_smmu_read_gr1(smmu, ARM_SMMU_GR1_CBFRSYNRA(cfg->cbndx));
+ fsynr = arm_smmu_read_cb(smmu, idx, ARM_SMMU_CB_FSYNR0);
+ iova = arm_smmu_read_cb_q(smmu, idx, ARM_SMMU_CB_FAR);
+ cbfrsynra = arm_smmu_read_gr1(smmu, ARM_SMMU_GR1_CBFRSYNRA(idx));
dev_err_ratelimited(smmu->dev,
"Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
- fsr, iova, fsynr, cbfrsynra, cfg->cbndx);
+ fsr, iova, fsynr, cbfrsynra, idx);
- writel(fsr, cb_base + ARM_SMMU_CB_FSR);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_FSR, fsr);
return IRQ_HANDLED;
}
@@ -693,13 +706,10 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
bool stage1;
struct arm_smmu_cb *cb = &smmu->cbs[idx];
struct arm_smmu_cfg *cfg = cb->cfg;
- void __iomem *cb_base;
-
- cb_base = ARM_SMMU_CB(smmu, idx);
/* Unassigned context banks only need disabling */
if (!cfg) {
- writel_relaxed(0, cb_base + ARM_SMMU_CB_SCTLR);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_SCTLR, 0);
return;
}
@@ -742,24 +752,25 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
* access behaviour of some fields (in particular, ASID[15:8]).
*/
if (stage1 && smmu->version > ARM_SMMU_V1)
- writel_relaxed(cb->tcr[1], cb_base + ARM_SMMU_CB_TCR2);
- writel_relaxed(cb->tcr[0], cb_base + ARM_SMMU_CB_TCR);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_TCR2, cb->tcr[1]);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_TCR, cb->tcr[0]);
/* TTBRs */
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH32_S) {
- writel_relaxed(cfg->asid, cb_base + ARM_SMMU_CB_CONTEXTIDR);
- writel_relaxed(cb->ttbr[0], cb_base + ARM_SMMU_CB_TTBR0);
- writel_relaxed(cb->ttbr[1], cb_base + ARM_SMMU_CB_TTBR1);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_CONTEXTIDR, cfg->asid);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_TTBR0, cb->ttbr[0]);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_TTBR1, cb->ttbr[1]);
} else {
- writeq_relaxed(cb->ttbr[0], cb_base + ARM_SMMU_CB_TTBR0);
+ arm_smmu_write_cb_q(smmu, idx, ARM_SMMU_CB_TTBR0, cb->ttbr[0]);
if (stage1)
- writeq_relaxed(cb->ttbr[1], cb_base + ARM_SMMU_CB_TTBR1);
+ arm_smmu_write_cb_q(smmu, idx, ARM_SMMU_CB_TTBR1,
+ cb->ttbr[1]);
}
/* MAIRs (stage-1 only) */
if (stage1) {
- writel_relaxed(cb->mair[0], cb_base + ARM_SMMU_CB_S1_MAIR0);
- writel_relaxed(cb->mair[1], cb_base + ARM_SMMU_CB_S1_MAIR1);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_S1_MAIR0, cb->mair[0]);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_S1_MAIR1, cb->mair[1]);
}
/* SCTLR */
@@ -769,7 +780,7 @@ static void arm_smmu_write_context_bank(struct arm_smmu_device *smmu, int idx)
if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
reg |= SCTLR_E;
- writel_relaxed(reg, cb_base + ARM_SMMU_CB_SCTLR);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_SCTLR, reg);
}
static int arm_smmu_init_domain_context(struct iommu_domain *domain,
@@ -1366,27 +1377,25 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
struct io_pgtable_ops *ops= smmu_domain->pgtbl_ops;
struct device *dev = smmu->dev;
- void __iomem *cb_base;
+ void __iomem *reg;
u32 tmp;
u64 phys;
unsigned long va, flags;
- int ret;
+ int ret, idx = cfg->cbndx;
ret = arm_smmu_rpm_get(smmu);
if (ret < 0)
return 0;
- cb_base = ARM_SMMU_CB(smmu, cfg->cbndx);
-
spin_lock_irqsave(&smmu_domain->cb_lock, flags);
va = iova & ~0xfffUL;
if (cfg->fmt == ARM_SMMU_CTX_FMT_AARCH64)
- writeq_relaxed(va, cb_base + ARM_SMMU_CB_ATS1PR);
+ arm_smmu_write_cb_q(smmu, idx, ARM_SMMU_CB_ATS1PR, va);
else
- writel_relaxed(va, cb_base + ARM_SMMU_CB_ATS1PR);
+ arm_smmu_write_cb(smmu, idx, ARM_SMMU_CB_ATS1PR, va);
- if (readl_poll_timeout_atomic(cb_base + ARM_SMMU_CB_ATSR, tmp,
- !(tmp & ATSR_ACTIVE), 5, 50)) {
+ reg = arm_smmu_page(smmu, smmu->cb_base + idx) + ARM_SMMU_CB_ATSR;
+ if (readl_poll_timeout_atomic(reg, tmp, !(tmp & ATSR_ACTIVE), 5, 50)) {
spin_unlock_irqrestore(&smmu_domain->cb_lock, flags);
dev_err(dev,
"iova to phys timed out on %pad. Falling back to software table walk.\n",
@@ -1394,7 +1403,7 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
return ops->iova_to_phys(ops, iova);
}
- phys = readq_relaxed(cb_base + ARM_SMMU_CB_PAR);
+ phys = arm_smmu_read_cb_q(smmu, idx, ARM_SMMU_CB_PAR);
spin_unlock_irqrestore(&smmu_domain->cb_lock, flags);
if (phys & CB_PAR_F) {
dev_err(dev, "translation fault!\n");
@@ -1758,18 +1767,16 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
/* Make sure all context banks are disabled and clear CB_FSR */
for (i = 0; i < smmu->num_context_banks; ++i) {
- void __iomem *cb_base = ARM_SMMU_CB(smmu, i);
-
arm_smmu_write_context_bank(smmu, i);
- writel_relaxed(FSR_FAULT, cb_base + ARM_SMMU_CB_FSR);
+ arm_smmu_write_cb(smmu, i, ARM_SMMU_CB_FSR, FSR_FAULT);
/*
* Disable MMU-500's not-particularly-beneficial next-page
* prefetcher for the sake of errata #841119 and #826419.
*/
if (smmu->model == ARM_MMU500) {
- reg = readl_relaxed(cb_base + ARM_SMMU_CB_ACTLR);
+ reg = arm_smmu_read_cb(smmu, i, ARM_SMMU_CB_ACTLR);
reg &= ~ARM_MMU500_ACTLR_CPRE;
- writel_relaxed(reg, cb_base + ARM_SMMU_CB_ACTLR);
+ arm_smmu_write_cb(smmu, i, ARM_SMMU_CB_ACTLR, reg);
}
}
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* Re: [PATCH 08/15] iommu/arm-smmu: Abstract context bank accesses
2019-08-09 17:07 ` [PATCH 08/15] iommu/arm-smmu: Abstract context bank accesses Robin Murphy
@ 2019-08-15 10:56 ` Will Deacon
2019-08-15 11:41 ` Robin Murphy
0 siblings, 1 reply; 30+ messages in thread
From: Will Deacon @ 2019-08-15 10:56 UTC (permalink / raw)
To: Robin Murphy; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On Fri, Aug 09, 2019 at 06:07:45PM +0100, Robin Murphy wrote:
> Context bank accesses are fiddly enough to deserve a number of extra
> helpers to keep the callsites looking sane, even though there are only
> one or two of each.
>
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
> drivers/iommu/arm-smmu.c | 137 ++++++++++++++++++++-------------------
> 1 file changed, 72 insertions(+), 65 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
> index 72505647b77d..abdcc3f52e2e 100644
> --- a/drivers/iommu/arm-smmu.c
> +++ b/drivers/iommu/arm-smmu.c
> @@ -82,9 +82,6 @@
> ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \
> ? 0x400 : 0))
>
> -/* Translation context bank */
> -#define ARM_SMMU_CB(smmu, n) ((smmu)->base + (((smmu)->cb_base + (n)) << (smmu)->pgshift))
> -
> #define MSI_IOVA_BASE 0x8000000
> #define MSI_IOVA_LENGTH 0x100000
>
> @@ -265,9 +262,29 @@ static void arm_smmu_writel(struct arm_smmu_device *smmu, int page, int offset,
> writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
> }
>
> +static u64 arm_smmu_readq(struct arm_smmu_device *smmu, int page, int offset)
> +{
> + return readq_relaxed(arm_smmu_page(smmu, page) + offset);
> +}
> +
> +static void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, int offset,
> + u64 val)
> +{
> + writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
> +}
> +
> #define arm_smmu_read_gr1(s, r) arm_smmu_readl((s), 1, (r))
> #define arm_smmu_write_gr1(s, r, v) arm_smmu_writel((s), 1, (r), (v))
>
> +#define arm_smmu_read_cb(s, n, r) \
> + arm_smmu_readl((s), (s)->cb_base + (n), (r))
> +#define arm_smmu_write_cb(s, n, r, v) \
> + arm_smmu_writel((s), (s)->cb_base + (n), (r), (v))
> +#define arm_smmu_read_cb_q(s, n, r) \
> + arm_smmu_readq((s), (s)->cb_base + (n), (r))
> +#define arm_smmu_write_cb_q(s, n, r, v) \
> + arm_smmu_writeq((s), (s)->cb_base + (n), (r), (v))
'r' for 'offset'? (maybe just rename offset => register in the helpers).
> struct arm_smmu_option_prop {
> u32 opt;
> const char *prop;
> @@ -423,15 +440,17 @@ static void __arm_smmu_free_bitmap(unsigned long *map, int idx)
> }
>
> /* Wait for any pending TLB invalidations to complete */
> -static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu,
> - void __iomem *sync, void __iomem *status)
> +static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu, int page,
> + int sync, int status)
> {
> unsigned int spin_cnt, delay;
> + u32 reg;
>
> - writel_relaxed(QCOM_DUMMY_VAL, sync);
> + arm_smmu_writel(smmu, page, sync, QCOM_DUMMY_VAL);
> for (delay = 1; delay < TLB_LOOP_TIMEOUT; delay *= 2) {
> for (spin_cnt = TLB_SPIN_COUNT; spin_cnt > 0; spin_cnt--) {
> - if (!(readl_relaxed(status) & sTLBGSTATUS_GSACTIVE))
> + reg = arm_smmu_readl(smmu, page, status);
> + if (!(reg & sTLBGSTATUS_GSACTIVE))
> return;
> cpu_relax();
> }
> @@ -443,12 +462,11 @@ static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu,
>
> static void arm_smmu_tlb_sync_global(struct arm_smmu_device *smmu)
> {
> - void __iomem *base = ARM_SMMU_GR0(smmu);
> unsigned long flags;
>
> spin_lock_irqsave(&smmu->global_sync_lock, flags);
> - __arm_smmu_tlb_sync(smmu, base + ARM_SMMU_GR0_sTLBGSYNC,
> - base + ARM_SMMU_GR0_sTLBGSTATUS);
> + __arm_smmu_tlb_sync(smmu, 0, ARM_SMMU_GR0_sTLBGSYNC,
Can we have a #define for page zero, please?
Will
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread* Re: [PATCH 08/15] iommu/arm-smmu: Abstract context bank accesses
2019-08-15 10:56 ` Will Deacon
@ 2019-08-15 11:41 ` Robin Murphy
0 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-15 11:41 UTC (permalink / raw)
To: Will Deacon; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On 15/08/2019 11:56, Will Deacon wrote:
> On Fri, Aug 09, 2019 at 06:07:45PM +0100, Robin Murphy wrote:
>> Context bank accesses are fiddly enough to deserve a number of extra
>> helpers to keep the callsites looking sane, even though there are only
>> one or two of each.
>>
>> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
>> ---
>> drivers/iommu/arm-smmu.c | 137 ++++++++++++++++++++-------------------
>> 1 file changed, 72 insertions(+), 65 deletions(-)
>>
>> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
>> index 72505647b77d..abdcc3f52e2e 100644
>> --- a/drivers/iommu/arm-smmu.c
>> +++ b/drivers/iommu/arm-smmu.c
>> @@ -82,9 +82,6 @@
>> ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \
>> ? 0x400 : 0))
>>
>> -/* Translation context bank */
>> -#define ARM_SMMU_CB(smmu, n) ((smmu)->base + (((smmu)->cb_base + (n)) << (smmu)->pgshift))
>> -
>> #define MSI_IOVA_BASE 0x8000000
>> #define MSI_IOVA_LENGTH 0x100000
>>
>> @@ -265,9 +262,29 @@ static void arm_smmu_writel(struct arm_smmu_device *smmu, int page, int offset,
>> writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
>> }
>>
>> +static u64 arm_smmu_readq(struct arm_smmu_device *smmu, int page, int offset)
>> +{
>> + return readq_relaxed(arm_smmu_page(smmu, page) + offset);
>> +}
>> +
>> +static void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, int offset,
>> + u64 val)
>> +{
>> + writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
>> +}
>> +
>> #define arm_smmu_read_gr1(s, r) arm_smmu_readl((s), 1, (r))
>> #define arm_smmu_write_gr1(s, r, v) arm_smmu_writel((s), 1, (r), (v))
>>
>> +#define arm_smmu_read_cb(s, n, r) \
>> + arm_smmu_readl((s), (s)->cb_base + (n), (r))
>> +#define arm_smmu_write_cb(s, n, r, v) \
>> + arm_smmu_writel((s), (s)->cb_base + (n), (r), (v))
>> +#define arm_smmu_read_cb_q(s, n, r) \
>> + arm_smmu_readq((s), (s)->cb_base + (n), (r))
>> +#define arm_smmu_write_cb_q(s, n, r, v) \
>> + arm_smmu_writeq((s), (s)->cb_base + (n), (r), (v))
>
> 'r' for 'offset'? (maybe just rename offset => register in the helpers).
I think this all represents the mangled remains of an underlying notion
of 'register offset' ;)
>> struct arm_smmu_option_prop {
>> u32 opt;
>> const char *prop;
>> @@ -423,15 +440,17 @@ static void __arm_smmu_free_bitmap(unsigned long *map, int idx)
>> }
>>
>> /* Wait for any pending TLB invalidations to complete */
>> -static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu,
>> - void __iomem *sync, void __iomem *status)
>> +static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu, int page,
>> + int sync, int status)
>> {
>> unsigned int spin_cnt, delay;
>> + u32 reg;
>>
>> - writel_relaxed(QCOM_DUMMY_VAL, sync);
>> + arm_smmu_writel(smmu, page, sync, QCOM_DUMMY_VAL);
>> for (delay = 1; delay < TLB_LOOP_TIMEOUT; delay *= 2) {
>> for (spin_cnt = TLB_SPIN_COUNT; spin_cnt > 0; spin_cnt--) {
>> - if (!(readl_relaxed(status) & sTLBGSTATUS_GSACTIVE))
>> + reg = arm_smmu_readl(smmu, page, status);
>> + if (!(reg & sTLBGSTATUS_GSACTIVE))
>> return;
>> cpu_relax();
>> }
>> @@ -443,12 +462,11 @@ static void __arm_smmu_tlb_sync(struct arm_smmu_device *smmu,
>>
>> static void arm_smmu_tlb_sync_global(struct arm_smmu_device *smmu)
>> {
>> - void __iomem *base = ARM_SMMU_GR0(smmu);
>> unsigned long flags;
>>
>> spin_lock_irqsave(&smmu->global_sync_lock, flags);
>> - __arm_smmu_tlb_sync(smmu, base + ARM_SMMU_GR0_sTLBGSYNC,
>> - base + ARM_SMMU_GR0_sTLBGSTATUS);
>> + __arm_smmu_tlb_sync(smmu, 0, ARM_SMMU_GR0_sTLBGSYNC,
>
> Can we have a #define for page zero, please?
Again, now I recall pondering the exact same thought, so clearly I don't
have any grounds to object. I guess it's worth reworking the previous
ARM_SMMU_{GR0,GR1,CB()} macros into the page number scheme rather than
just killing them off - let me give that a try.
Robin.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread
* [PATCH 09/15] iommu/arm-smmu: Abstract GR0 accesses
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (7 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 08/15] iommu/arm-smmu: Abstract context bank accesses Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 10/15] iommu/arm-smmu: Rename arm-smmu-regs.h Robin Murphy
` (7 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Clean up the remaining accesses to GR0 registers, so that everything is
now neatly abstracted. This folds up the Non-Secure alias quirk as the
first step towards moving it out of the way entirely. Although GR0 does
technically contain some 64-bit registers (sGFAR and the weird SMMUv2
HYPC and MONC stuff), they're not ones we have any need to access.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu.c | 101 +++++++++++++++++++++------------------
1 file changed, 54 insertions(+), 47 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index abdcc3f52e2e..d1ba5d115713 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -69,19 +69,6 @@
/* Maximum number of context banks per SMMU */
#define ARM_SMMU_MAX_CBS 128
-/* SMMU global address space */
-#define ARM_SMMU_GR0(smmu) ((smmu)->base)
-
-/*
- * SMMU global address space with conditional offset to access secure
- * aliases of non-secure registers (e.g. nsCR0: 0x400, nsGFSR: 0x448,
- * nsGFSYNR0: 0x450)
- */
-#define ARM_SMMU_GR0_NS(smmu) \
- ((smmu)->base + \
- ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \
- ? 0x400 : 0))
-
#define MSI_IOVA_BASE 0x8000000
#define MSI_IOVA_LENGTH 0x100000
@@ -246,6 +233,21 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
+static int arm_smmu_gr0_ns(int offset)
+{
+ switch(offset) {
+ case ARM_SMMU_GR0_sCR0:
+ case ARM_SMMU_GR0_sACR:
+ case ARM_SMMU_GR0_sGFSR:
+ case ARM_SMMU_GR0_sGFSYNR0:
+ case ARM_SMMU_GR0_sGFSYNR1:
+ case ARM_SMMU_GR0_sGFSYNR2:
+ return offset + 0x400;
+ default:
+ return offset;
+ }
+}
+
static void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
{
return smmu->base + (n << smmu->pgshift);
@@ -253,12 +255,18 @@ static void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
static u32 arm_smmu_readl(struct arm_smmu_device *smmu, int page, int offset)
{
+ if ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) && page == 0)
+ offset = arm_smmu_gr0_ns(offset);
+
return readl_relaxed(arm_smmu_page(smmu, page) + offset);
}
static void arm_smmu_writel(struct arm_smmu_device *smmu, int page, int offset,
u32 val)
{
+ if ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) && page == 0)
+ offset = arm_smmu_gr0_ns(offset);
+
writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
}
@@ -273,6 +281,9 @@ static void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, int offset,
writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
}
+#define arm_smmu_read_gr0(s, r) arm_smmu_readl((s), 0, (r))
+#define arm_smmu_write_gr0(s, r, v) arm_smmu_writel((s), 0, (r), (v))
+
#define arm_smmu_read_gr1(s, r) arm_smmu_readl((s), 1, (r))
#define arm_smmu_write_gr1(s, r, v) arm_smmu_writel((s), 1, (r), (v))
@@ -506,10 +517,10 @@ static void arm_smmu_tlb_inv_context_s2(void *cookie)
{
struct arm_smmu_domain *smmu_domain = cookie;
struct arm_smmu_device *smmu = smmu_domain->smmu;
- void __iomem *base = ARM_SMMU_GR0(smmu);
- /* NOTE: see above */
- writel(smmu_domain->cfg.vmid, base + ARM_SMMU_GR0_TLBIVMID);
+ /* See above */
+ wmb();
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_TLBIVMID, smmu_domain->cfg.vmid);
arm_smmu_tlb_sync_global(smmu);
}
@@ -574,12 +585,12 @@ static void arm_smmu_tlb_inv_vmid_nosync(unsigned long iova, size_t size,
size_t granule, bool leaf, void *cookie)
{
struct arm_smmu_domain *smmu_domain = cookie;
- void __iomem *base = ARM_SMMU_GR0(smmu_domain->smmu);
+ struct arm_smmu_device *smmu = smmu_domain->smmu;
- if (smmu_domain->smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
+ if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK)
wmb();
- writel_relaxed(smmu_domain->cfg.vmid, base + ARM_SMMU_GR0_TLBIVMID);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_TLBIVMID, smmu_domain->cfg.vmid);
}
static const struct iommu_gather_ops arm_smmu_s1_tlb_ops = {
@@ -629,12 +640,11 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev)
{
u32 gfsr, gfsynr0, gfsynr1, gfsynr2;
struct arm_smmu_device *smmu = dev;
- void __iomem *gr0_base = ARM_SMMU_GR0_NS(smmu);
- gfsr = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSR);
- gfsynr0 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR0);
- gfsynr1 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR1);
- gfsynr2 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR2);
+ gfsr = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sGFSR);
+ gfsynr0 = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sGFSYNR0);
+ gfsynr1 = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sGFSYNR1);
+ gfsynr2 = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sGFSYNR2);
if (!gfsr)
return IRQ_NONE;
@@ -645,7 +655,7 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev)
"\tGFSR 0x%08x, GFSYNR0 0x%08x, GFSYNR1 0x%08x, GFSYNR2 0x%08x\n",
gfsr, gfsynr0, gfsynr1, gfsynr2);
- writel(gfsr, gr0_base + ARM_SMMU_GR0_sGFSR);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sGFSR, gfsr);
return IRQ_HANDLED;
}
@@ -1051,7 +1061,7 @@ static void arm_smmu_write_smr(struct arm_smmu_device *smmu, int idx)
if (!(smmu->features & ARM_SMMU_FEAT_EXIDS) && smr->valid)
reg |= SMR_VALID;
- writel_relaxed(reg, ARM_SMMU_GR0(smmu) + ARM_SMMU_GR0_SMR(idx));
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_SMR(idx), reg);
}
static void arm_smmu_write_s2cr(struct arm_smmu_device *smmu, int idx)
@@ -1064,7 +1074,7 @@ static void arm_smmu_write_s2cr(struct arm_smmu_device *smmu, int idx)
if (smmu->features & ARM_SMMU_FEAT_EXIDS && smmu->smrs &&
smmu->smrs[idx].valid)
reg |= S2CR_EXIDVALID;
- writel_relaxed(reg, ARM_SMMU_GR0(smmu) + ARM_SMMU_GR0_S2CR(idx));
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_S2CR(idx), reg);
}
static void arm_smmu_write_sme(struct arm_smmu_device *smmu, int idx)
@@ -1080,7 +1090,6 @@ static void arm_smmu_write_sme(struct arm_smmu_device *smmu, int idx)
*/
static void arm_smmu_test_smr_masks(struct arm_smmu_device *smmu)
{
- void __iomem *gr0_base = ARM_SMMU_GR0(smmu);
u32 smr;
if (!smmu->smrs)
@@ -1092,13 +1101,13 @@ static void arm_smmu_test_smr_masks(struct arm_smmu_device *smmu)
* masters later if they try to claim IDs outside these masks.
*/
smr = FIELD_PREP(SMR_ID, smmu->streamid_mask);
- writel_relaxed(smr, gr0_base + ARM_SMMU_GR0_SMR(0));
- smr = readl_relaxed(gr0_base + ARM_SMMU_GR0_SMR(0));
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_SMR(0), smr);
+ smr = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_SMR(0));
smmu->streamid_mask = FIELD_GET(SMR_ID, smr);
smr = FIELD_PREP(SMR_MASK, smmu->streamid_mask);
- writel_relaxed(smr, gr0_base + ARM_SMMU_GR0_SMR(0));
- smr = readl_relaxed(gr0_base + ARM_SMMU_GR0_SMR(0));
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_SMR(0), smr);
+ smr = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_SMR(0));
smmu->smr_mask_mask = FIELD_GET(SMR_MASK, smr);
}
@@ -1731,13 +1740,12 @@ static struct iommu_ops arm_smmu_ops = {
static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
{
- void __iomem *gr0_base = ARM_SMMU_GR0(smmu);
int i;
u32 reg, major;
/* clear global FSR */
- reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR);
- writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR);
+ reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sGFSR);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sGFSR, reg);
/*
* Reset stream mapping groups: Initial values mark all SMRn as
@@ -1752,9 +1760,9 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
* clear CACHE_LOCK bit of ACR first. And, CACHE_LOCK
* bit is only present in MMU-500r2 onwards.
*/
- reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID7);
+ reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_ID7);
major = FIELD_GET(ID7_MAJOR, reg);
- reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_sACR);
+ reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sACR);
if (major >= 2)
reg &= ~ARM_MMU500_ACR_CACHE_LOCK;
/*
@@ -1762,7 +1770,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
* TLB entries for reduced latency.
*/
reg |= ARM_MMU500_ACR_SMTNMB_TLBEN | ARM_MMU500_ACR_S2CRB_TLBEN;
- writel_relaxed(reg, gr0_base + ARM_SMMU_GR0_sACR);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sACR, reg);
}
/* Make sure all context banks are disabled and clear CB_FSR */
@@ -1781,10 +1789,10 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
}
/* Invalidate the TLB, just in case */
- writel_relaxed(QCOM_DUMMY_VAL, gr0_base + ARM_SMMU_GR0_TLBIALLH);
- writel_relaxed(QCOM_DUMMY_VAL, gr0_base + ARM_SMMU_GR0_TLBIALLNSNH);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_TLBIALLH, QCOM_DUMMY_VAL);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_TLBIALLNSNH, QCOM_DUMMY_VAL);
- reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
+ reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sCR0);
/* Enable fault reporting */
reg |= (sCR0_GFRE | sCR0_GFIE | sCR0_GCFGFRE | sCR0_GCFGFIE);
@@ -1813,7 +1821,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
/* Push the button */
arm_smmu_tlb_sync_global(smmu);
- writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sCR0, reg);
}
static int arm_smmu_id_size_to_bits(int size)
@@ -1838,7 +1846,6 @@ static int arm_smmu_id_size_to_bits(int size)
static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
{
unsigned int size;
- void __iomem *gr0_base = ARM_SMMU_GR0(smmu);
u32 id;
bool cttw_reg, cttw_fw = smmu->features & ARM_SMMU_FEAT_COHERENT_WALK;
int i;
@@ -1848,7 +1855,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
smmu->version == ARM_SMMU_V2 ? 2 : 1);
/* ID0 */
- id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID0);
+ id = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_ID0);
/* Restrict available stages based on module parameter */
if (force_stage == 1)
@@ -1942,7 +1949,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
}
/* ID1 */
- id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID1);
+ id = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_ID1);
smmu->pgshift = (id & ID1_PAGESIZE) ? 16 : 12;
/* Check for size mismatch of SMMU address space from mapped region */
@@ -1980,7 +1987,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
return -ENOMEM;
/* ID2 */
- id = readl_relaxed(gr0_base + ARM_SMMU_GR0_ID2);
+ id = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_ID2);
size = arm_smmu_id_size_to_bits(FIELD_GET(ID2_IAS, id));
smmu->ipa_size = size;
@@ -2364,7 +2371,7 @@ static void arm_smmu_device_shutdown(struct platform_device *pdev)
arm_smmu_rpm_get(smmu);
/* Turn the thing off */
- writel(sCR0_CLIENTPD, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sCR0, sCR0_CLIENTPD);
arm_smmu_rpm_put(smmu);
if (pm_runtime_enabled(smmu->dev))
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 10/15] iommu/arm-smmu: Rename arm-smmu-regs.h
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (8 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 09/15] iommu/arm-smmu: Abstract GR0 accesses Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 11/15] iommu/arm-smmu: Add implementation infrastructure Robin Murphy
` (6 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
We're about to start using it for more than just register definitions,
so generalise the name.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu.c | 2 +-
drivers/iommu/{arm-smmu-regs.h => arm-smmu.h} | 6 +++---
drivers/iommu/qcom_iommu.c | 2 +-
3 files changed, 5 insertions(+), 5 deletions(-)
rename drivers/iommu/{arm-smmu-regs.h => arm-smmu.h} (98%)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index d1ba5d115713..09e2e71355d5 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -46,7 +46,7 @@
#include <linux/amba/bus.h>
#include <linux/fsl/mc.h>
-#include "arm-smmu-regs.h"
+#include "arm-smmu.h"
/*
* Apparently, some Qualcomm arm64 platforms which appear to expose their SMMU
diff --git a/drivers/iommu/arm-smmu-regs.h b/drivers/iommu/arm-smmu.h
similarity index 98%
rename from drivers/iommu/arm-smmu-regs.h
rename to drivers/iommu/arm-smmu.h
index 75056edad31d..3480f2621abe 100644
--- a/drivers/iommu/arm-smmu-regs.h
+++ b/drivers/iommu/arm-smmu.h
@@ -7,8 +7,8 @@
* Author: Will Deacon <will.deacon@arm.com>
*/
-#ifndef _ARM_SMMU_REGS_H
-#define _ARM_SMMU_REGS_H
+#ifndef _ARM_SMMU_H
+#define _ARM_SMMU_H
#include <linux/bits.h>
@@ -194,4 +194,4 @@ enum arm_smmu_cbar_type {
#define ARM_SMMU_CB_ATSR 0x8f0
#define ATSR_ACTIVE BIT(0)
-#endif /* _ARM_SMMU_REGS_H */
+#endif /* _ARM_SMMU_H */
diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c
index 746bf2a7df05..dadc707573a2 100644
--- a/drivers/iommu/qcom_iommu.c
+++ b/drivers/iommu/qcom_iommu.c
@@ -33,7 +33,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
-#include "arm-smmu-regs.h"
+#include "arm-smmu.h"
#define SMMU_INTR_SEL_NS 0x2000
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 11/15] iommu/arm-smmu: Add implementation infrastructure
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (9 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 10/15] iommu/arm-smmu: Rename arm-smmu-regs.h Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 12/15] iommu/arm-smmu: Move Secure access quirk to implementation Robin Murphy
` (5 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Add some nascent infrastructure for handling implementation-specific
details outside the flow of the architectural code. This will allow us
to keep mutually-incompatible vendor-specific hooks in their own files
where the respective interested parties can maintain them with minimal
chance of conflicts. As somewhat of a template, we'll start with a
general place to collect the relatively trivial existing quirks.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
MAINTAINERS | 3 +-
drivers/iommu/Makefile | 2 +-
drivers/iommu/arm-smmu-impl.c | 13 +++++
drivers/iommu/arm-smmu.c | 82 ++------------------------------
drivers/iommu/arm-smmu.h | 89 +++++++++++++++++++++++++++++++++++
5 files changed, 108 insertions(+), 81 deletions(-)
create mode 100644 drivers/iommu/arm-smmu-impl.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 6426db5198f0..35ff49ac303b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1350,8 +1350,7 @@ M: Will Deacon <will@kernel.org>
R: Robin Murphy <robin.murphy@arm.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
-F: drivers/iommu/arm-smmu.c
-F: drivers/iommu/arm-smmu-v3.c
+F: drivers/iommu/arm-smmu*
F: drivers/iommu/io-pgtable-arm.c
F: drivers/iommu/io-pgtable-arm-v7s.c
diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
index f13f36ae1af6..a2729aadd300 100644
--- a/drivers/iommu/Makefile
+++ b/drivers/iommu/Makefile
@@ -13,7 +13,7 @@ obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o
obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
obj-$(CONFIG_AMD_IOMMU_DEBUGFS) += amd_iommu_debugfs.o
obj-$(CONFIG_AMD_IOMMU_V2) += amd_iommu_v2.o
-obj-$(CONFIG_ARM_SMMU) += arm-smmu.o
+obj-$(CONFIG_ARM_SMMU) += arm-smmu.o arm-smmu-impl.o
obj-$(CONFIG_ARM_SMMU_V3) += arm-smmu-v3.o
obj-$(CONFIG_DMAR_TABLE) += dmar.o
obj-$(CONFIG_INTEL_IOMMU) += intel-iommu.o intel-pasid.o
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
new file mode 100644
index 000000000000..efeb6d78da17
--- /dev/null
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Miscellaneous Arm SMMU implementation and integration quirks
+// Copyright (C) 2019 Arm Limited
+
+#define pr_fmt(fmt) "arm-smmu: " fmt
+
+#include "arm-smmu.h"
+
+
+struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
+{
+ return smmu;
+}
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 09e2e71355d5..86e11141a0bb 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -19,7 +19,6 @@
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
-#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/dma-iommu.h>
@@ -29,7 +28,6 @@
#include <linux/io.h>
#include <linux/io-64-nonatomic-hi-lo.h>
#include <linux/io-pgtable.h>
-#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
@@ -41,7 +39,6 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
-#include <linux/spinlock.h>
#include <linux/amba/bus.h>
#include <linux/fsl/mc.h>
@@ -66,9 +63,6 @@
#define TLB_LOOP_TIMEOUT 1000000 /* 1s! */
#define TLB_SPIN_COUNT 10
-/* Maximum number of context banks per SMMU */
-#define ARM_SMMU_MAX_CBS 128
-
#define MSI_IOVA_BASE 0x8000000
#define MSI_IOVA_LENGTH 0x100000
@@ -86,19 +80,6 @@ module_param(disable_bypass, bool, S_IRUGO);
MODULE_PARM_DESC(disable_bypass,
"Disable bypass streams such that incoming transactions from devices that are not attached to an iommu domain will report an abort back to the device and will not be allowed to pass through the SMMU.");
-enum arm_smmu_arch_version {
- ARM_SMMU_V1,
- ARM_SMMU_V1_64K,
- ARM_SMMU_V2,
-};
-
-enum arm_smmu_implementation {
- GENERIC_SMMU,
- ARM_MMU500,
- CAVIUM_SMMUV2,
- QCOM_SMMUV2,
-};
-
struct arm_smmu_s2cr {
struct iommu_group *group;
int count;
@@ -136,65 +117,6 @@ struct arm_smmu_master_cfg {
#define for_each_cfg_sme(fw, i, idx) \
for (i = 0; idx = fwspec_smendx(fw, i), i < fw->num_ids; ++i)
-struct arm_smmu_device {
- struct device *dev;
-
- void __iomem *base;
- unsigned int cb_base;
- unsigned int pgshift;
-
-#define ARM_SMMU_FEAT_COHERENT_WALK (1 << 0)
-#define ARM_SMMU_FEAT_STREAM_MATCH (1 << 1)
-#define ARM_SMMU_FEAT_TRANS_S1 (1 << 2)
-#define ARM_SMMU_FEAT_TRANS_S2 (1 << 3)
-#define ARM_SMMU_FEAT_TRANS_NESTED (1 << 4)
-#define ARM_SMMU_FEAT_TRANS_OPS (1 << 5)
-#define ARM_SMMU_FEAT_VMID16 (1 << 6)
-#define ARM_SMMU_FEAT_FMT_AARCH64_4K (1 << 7)
-#define ARM_SMMU_FEAT_FMT_AARCH64_16K (1 << 8)
-#define ARM_SMMU_FEAT_FMT_AARCH64_64K (1 << 9)
-#define ARM_SMMU_FEAT_FMT_AARCH32_L (1 << 10)
-#define ARM_SMMU_FEAT_FMT_AARCH32_S (1 << 11)
-#define ARM_SMMU_FEAT_EXIDS (1 << 12)
- u32 features;
-
-#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0)
- u32 options;
- enum arm_smmu_arch_version version;
- enum arm_smmu_implementation model;
-
- u32 num_context_banks;
- u32 num_s2_context_banks;
- DECLARE_BITMAP(context_map, ARM_SMMU_MAX_CBS);
- struct arm_smmu_cb *cbs;
- atomic_t irptndx;
-
- u32 num_mapping_groups;
- u16 streamid_mask;
- u16 smr_mask_mask;
- struct arm_smmu_smr *smrs;
- struct arm_smmu_s2cr *s2crs;
- struct mutex stream_map_mutex;
-
- unsigned long va_size;
- unsigned long ipa_size;
- unsigned long pa_size;
- unsigned long pgsize_bitmap;
-
- u32 num_global_irqs;
- u32 num_context_irqs;
- unsigned int *irqs;
- struct clk_bulk_data *clks;
- int num_clks;
-
- u32 cavium_id_base; /* Specific to Cavium */
-
- spinlock_t global_sync_lock;
-
- /* IOMMU core code handle */
- struct iommu_device iommu;
-};
-
enum arm_smmu_context_fmt {
ARM_SMMU_CTX_FMT_NONE,
ARM_SMMU_CTX_FMT_AARCH64,
@@ -2225,6 +2147,10 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
if (err)
return err;
+ smmu = arm_smmu_impl_init(smmu);
+ if (IS_ERR(smmu))
+ return PTR_ERR(smmu);
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ioaddr = res->start;
smmu->base = devm_ioremap_resource(dev, res);
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index 3480f2621abe..460a29075bf8 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -10,7 +10,14 @@
#ifndef _ARM_SMMU_H
#define _ARM_SMMU_H
+#include <linux/atomic.h>
#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/iommu.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
/* Configuration registers */
#define ARM_SMMU_GR0_sCR0 0x0
@@ -194,4 +201,86 @@ enum arm_smmu_cbar_type {
#define ARM_SMMU_CB_ATSR 0x8f0
#define ATSR_ACTIVE BIT(0)
+
+/* Maximum number of context banks per SMMU */
+#define ARM_SMMU_MAX_CBS 128
+
+
+/* Shared driver definitions */
+enum arm_smmu_arch_version {
+ ARM_SMMU_V1,
+ ARM_SMMU_V1_64K,
+ ARM_SMMU_V2,
+};
+
+enum arm_smmu_implementation {
+ GENERIC_SMMU,
+ ARM_MMU500,
+ CAVIUM_SMMUV2,
+ QCOM_SMMUV2,
+};
+
+struct arm_smmu_device {
+ struct device *dev;
+
+ void __iomem *base;
+ unsigned int cb_base;
+ unsigned int pgshift;
+
+#define ARM_SMMU_FEAT_COHERENT_WALK (1 << 0)
+#define ARM_SMMU_FEAT_STREAM_MATCH (1 << 1)
+#define ARM_SMMU_FEAT_TRANS_S1 (1 << 2)
+#define ARM_SMMU_FEAT_TRANS_S2 (1 << 3)
+#define ARM_SMMU_FEAT_TRANS_NESTED (1 << 4)
+#define ARM_SMMU_FEAT_TRANS_OPS (1 << 5)
+#define ARM_SMMU_FEAT_VMID16 (1 << 6)
+#define ARM_SMMU_FEAT_FMT_AARCH64_4K (1 << 7)
+#define ARM_SMMU_FEAT_FMT_AARCH64_16K (1 << 8)
+#define ARM_SMMU_FEAT_FMT_AARCH64_64K (1 << 9)
+#define ARM_SMMU_FEAT_FMT_AARCH32_L (1 << 10)
+#define ARM_SMMU_FEAT_FMT_AARCH32_S (1 << 11)
+#define ARM_SMMU_FEAT_EXIDS (1 << 12)
+ u32 features;
+
+#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0)
+ u32 options;
+ enum arm_smmu_arch_version version;
+ enum arm_smmu_implementation model;
+
+ u32 num_context_banks;
+ u32 num_s2_context_banks;
+ DECLARE_BITMAP(context_map, ARM_SMMU_MAX_CBS);
+ struct arm_smmu_cb *cbs;
+ atomic_t irptndx;
+
+ u32 num_mapping_groups;
+ u16 streamid_mask;
+ u16 smr_mask_mask;
+ struct arm_smmu_smr *smrs;
+ struct arm_smmu_s2cr *s2crs;
+ struct mutex stream_map_mutex;
+
+ unsigned long va_size;
+ unsigned long ipa_size;
+ unsigned long pa_size;
+ unsigned long pgsize_bitmap;
+
+ u32 num_global_irqs;
+ u32 num_context_irqs;
+ unsigned int *irqs;
+ struct clk_bulk_data *clks;
+ int num_clks;
+
+ u32 cavium_id_base; /* Specific to Cavium */
+
+ spinlock_t global_sync_lock;
+
+ /* IOMMU core code handle */
+ struct iommu_device iommu;
+};
+
+
+/* Implementation details, yay! */
+struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu);
+
#endif /* _ARM_SMMU_H */
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 12/15] iommu/arm-smmu: Move Secure access quirk to implementation
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (10 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 11/15] iommu/arm-smmu: Add implementation infrastructure Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 13/15] iommu/arm-smmu: Add configuration implementation hook Robin Murphy
` (4 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Move detection of the Secure access quirk to its new home, trimming it
down in the process - time has proven that boolean DT flags are neither
ideal nor necessarily sufficient, so it's highly unlikely we'll ever add
more, let alone enough to justify the frankly overengineered parsing
machinery.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-impl.c | 44 +++++++++++++++++
drivers/iommu/arm-smmu.c | 89 -----------------------------------
drivers/iommu/arm-smmu.h | 64 ++++++++++++++++++++++++-
3 files changed, 106 insertions(+), 91 deletions(-)
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index efeb6d78da17..f8b8895e1bbe 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -4,10 +4,54 @@
#define pr_fmt(fmt) "arm-smmu: " fmt
+#include <linux/of.h>
+
#include "arm-smmu.h"
+static int arm_smmu_gr0_ns(int offset)
+{
+ switch(offset) {
+ case ARM_SMMU_GR0_sCR0:
+ case ARM_SMMU_GR0_sACR:
+ case ARM_SMMU_GR0_sGFSR:
+ case ARM_SMMU_GR0_sGFSYNR0:
+ case ARM_SMMU_GR0_sGFSYNR1:
+ case ARM_SMMU_GR0_sGFSYNR2:
+ return offset + 0x400;
+ default:
+ return offset;
+ }
+}
+
+static u32 arm_smmu_read_ns(struct arm_smmu_device *smmu, int page,
+ int offset)
+{
+ if (page == 0)
+ offset = arm_smmu_gr0_ns(offset);
+ return readl_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static void arm_smmu_write_ns(struct arm_smmu_device *smmu, int page,
+ int offset, u32 val)
+{
+ if (page == 0)
+ offset = arm_smmu_gr0_ns(offset);
+ writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
+/* Since we don't care for sGFAR, we can do without 64-bit accessors */
+const struct arm_smmu_impl calxeda_impl = {
+ .read_reg = arm_smmu_read_ns,
+ .write_reg = arm_smmu_write_ns,
+};
+
+
struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
{
+ if (of_property_read_bool(smmu->dev->of_node,
+ "calxeda,smmu-secure-config-access"))
+ smmu->impl = &calxeda_impl;
+
return smmu;
}
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 86e11141a0bb..03159a1da4c9 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -155,83 +155,10 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
-static int arm_smmu_gr0_ns(int offset)
-{
- switch(offset) {
- case ARM_SMMU_GR0_sCR0:
- case ARM_SMMU_GR0_sACR:
- case ARM_SMMU_GR0_sGFSR:
- case ARM_SMMU_GR0_sGFSYNR0:
- case ARM_SMMU_GR0_sGFSYNR1:
- case ARM_SMMU_GR0_sGFSYNR2:
- return offset + 0x400;
- default:
- return offset;
- }
-}
-
-static void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
-{
- return smmu->base + (n << smmu->pgshift);
-}
-
-static u32 arm_smmu_readl(struct arm_smmu_device *smmu, int page, int offset)
-{
- if ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) && page == 0)
- offset = arm_smmu_gr0_ns(offset);
-
- return readl_relaxed(arm_smmu_page(smmu, page) + offset);
-}
-
-static void arm_smmu_writel(struct arm_smmu_device *smmu, int page, int offset,
- u32 val)
-{
- if ((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) && page == 0)
- offset = arm_smmu_gr0_ns(offset);
-
- writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
-}
-
-static u64 arm_smmu_readq(struct arm_smmu_device *smmu, int page, int offset)
-{
- return readq_relaxed(arm_smmu_page(smmu, page) + offset);
-}
-
-static void arm_smmu_writeq(struct arm_smmu_device *smmu, int page, int offset,
- u64 val)
-{
- writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
-}
-
-#define arm_smmu_read_gr0(s, r) arm_smmu_readl((s), 0, (r))
-#define arm_smmu_write_gr0(s, r, v) arm_smmu_writel((s), 0, (r), (v))
-
-#define arm_smmu_read_gr1(s, r) arm_smmu_readl((s), 1, (r))
-#define arm_smmu_write_gr1(s, r, v) arm_smmu_writel((s), 1, (r), (v))
-
-#define arm_smmu_read_cb(s, n, r) \
- arm_smmu_readl((s), (s)->cb_base + (n), (r))
-#define arm_smmu_write_cb(s, n, r, v) \
- arm_smmu_writel((s), (s)->cb_base + (n), (r), (v))
-#define arm_smmu_read_cb_q(s, n, r) \
- arm_smmu_readq((s), (s)->cb_base + (n), (r))
-#define arm_smmu_write_cb_q(s, n, r, v) \
- arm_smmu_writeq((s), (s)->cb_base + (n), (r), (v))
-
-struct arm_smmu_option_prop {
- u32 opt;
- const char *prop;
-};
-
static atomic_t cavium_smmu_context_count = ATOMIC_INIT(0);
static bool using_legacy_binding, using_generic_binding;
-static struct arm_smmu_option_prop arm_smmu_options[] = {
- { ARM_SMMU_OPT_SECURE_CFG_ACCESS, "calxeda,smmu-secure-config-access" },
- { 0, NULL},
-};
-
static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
{
if (pm_runtime_enabled(smmu->dev))
@@ -251,20 +178,6 @@ static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
return container_of(dom, struct arm_smmu_domain, domain);
}
-static void parse_driver_options(struct arm_smmu_device *smmu)
-{
- int i = 0;
-
- do {
- if (of_property_read_bool(smmu->dev->of_node,
- arm_smmu_options[i].prop)) {
- smmu->options |= arm_smmu_options[i].opt;
- dev_notice(smmu->dev, "option %s\n",
- arm_smmu_options[i].prop);
- }
- } while (arm_smmu_options[++i].opt);
-}
-
static struct device_node *dev_get_dev_node(struct device *dev)
{
if (dev_is_pci(dev)) {
@@ -2083,8 +1996,6 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev,
smmu->version = data->version;
smmu->model = data->model;
- parse_driver_options(smmu);
-
legacy_binding = of_find_property(dev->of_node, "mmu-masters", NULL);
if (legacy_binding && !using_generic_binding) {
if (!using_legacy_binding)
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index 460a29075bf8..0485ee7fd4c1 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -242,10 +242,9 @@ struct arm_smmu_device {
#define ARM_SMMU_FEAT_EXIDS (1 << 12)
u32 features;
-#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0)
- u32 options;
enum arm_smmu_arch_version version;
enum arm_smmu_implementation model;
+ const struct arm_smmu_impl *impl;
u32 num_context_banks;
u32 num_s2_context_banks;
@@ -281,6 +280,67 @@ struct arm_smmu_device {
/* Implementation details, yay! */
+struct arm_smmu_impl {
+ u32 (*read_reg)(struct arm_smmu_device *smmu, int page, int offset);
+ void (*write_reg)(struct arm_smmu_device *smmu, int page, int offset,
+ u32 val);
+ u64 (*read_reg64)(struct arm_smmu_device *smmu, int page, int offset);
+ void (*write_reg64)(struct arm_smmu_device *smmu, int page, int offset,
+ u64 val);
+};
+
+static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
+{
+ return smmu->base + (n << smmu->pgshift);
+}
+
+static inline u32 arm_smmu_readl(struct arm_smmu_device *smmu, int page, int offset)
+{
+ if (smmu->impl && unlikely(smmu->impl->read_reg))
+ return smmu->impl->read_reg(smmu, page, offset);
+ return readl_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static inline void arm_smmu_writel(struct arm_smmu_device *smmu, int page,
+ int offset, u32 val)
+{
+ if (smmu->impl && unlikely(smmu->impl->write_reg))
+ smmu->impl->write_reg(smmu, page, offset, val);
+ else
+ writel_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
+static inline u64 arm_smmu_readq(struct arm_smmu_device *smmu, int page, int offset)
+{
+ if (smmu->impl && unlikely(smmu->impl->read_reg64))
+ return smmu->impl->read_reg64(smmu, page, offset);
+ return readq_relaxed(arm_smmu_page(smmu, page) + offset);
+}
+
+static inline void arm_smmu_writeq(struct arm_smmu_device *smmu, int page,
+ int offset, u64 val)
+{
+ if (smmu->impl && unlikely(smmu->impl->write_reg64))
+ smmu->impl->write_reg64(smmu, page, offset, val);
+ else
+ writeq_relaxed(val, arm_smmu_page(smmu, page) + offset);
+}
+
+#define arm_smmu_read_gr0(s, r) arm_smmu_readl((s), 0, (r))
+#define arm_smmu_write_gr0(s, r, v) arm_smmu_writel((s), 0, (r), (v))
+
+#define arm_smmu_read_gr1(s, r) arm_smmu_readl((s), 1, (r))
+#define arm_smmu_write_gr1(s, r, v) arm_smmu_writel((s), 1, (r), (v))
+
+#define arm_smmu_read_cb(s, n, r) \
+ arm_smmu_readl((s), (s)->cb_base + (n), (r))
+#define arm_smmu_write_cb(s, n, r, v) \
+ arm_smmu_writel((s), (s)->cb_base + (n), (r), (v))
+#define arm_smmu_read_cb_q(s, n, r) \
+ arm_smmu_readq((s), (s)->cb_base + (n), (r))
+#define arm_smmu_write_cb_q(s, n, r, v) \
+ arm_smmu_writeq((s), (s)->cb_base + (n), (r), (v))
+
struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu);
#endif /* _ARM_SMMU_H */
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 13/15] iommu/arm-smmu: Add configuration implementation hook
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (11 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 12/15] iommu/arm-smmu: Move Secure access quirk to implementation Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 14/15] iommu/arm-smmu: Add reset " Robin Murphy
` (3 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Probing the ID registers and setting up the SMMU configuration is an
area where overrides and workarounds may well be needed. Indeed, the
Cavium workaround detection lives there at the moment, so let's break
that out.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-impl.c | 24 ++++++++++++++++++++++++
drivers/iommu/arm-smmu.c | 17 +++--------------
drivers/iommu/arm-smmu.h | 1 +
3 files changed, 28 insertions(+), 14 deletions(-)
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index f8b8895e1bbe..0b444e476525 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -47,11 +47,35 @@ const struct arm_smmu_impl calxeda_impl = {
};
+static int cavium_cfg_probe(struct arm_smmu_device *smmu)
+{
+ static atomic_t context_count = ATOMIC_INIT(0);
+ /*
+ * Cavium CN88xx erratum #27704.
+ * Ensure ASID and VMID allocation is unique across all SMMUs in
+ * the system.
+ */
+ smmu->cavium_id_base = atomic_fetch_add(smmu->num_context_banks,
+ &context_count);
+ dev_notice(smmu->dev, "\tenabling workaround for Cavium erratum 27704\n");
+
+ return 0;
+}
+
+const struct arm_smmu_impl cavium_impl = {
+ .cfg_probe = cavium_cfg_probe,
+};
+
+
struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
{
+ /* The current quirks happen to be mutually-exclusive */
if (of_property_read_bool(smmu->dev->of_node,
"calxeda,smmu-secure-config-access"))
smmu->impl = &calxeda_impl;
+ if (smmu->model == CAVIUM_SMMUV2)
+ smmu->impl = &cavium_impl;
+
return smmu;
}
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 03159a1da4c9..80822d48f6c7 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -155,8 +155,6 @@ struct arm_smmu_domain {
struct iommu_domain domain;
};
-static atomic_t cavium_smmu_context_count = ATOMIC_INIT(0);
-
static bool using_legacy_binding, using_generic_binding;
static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
@@ -1804,18 +1802,6 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
}
dev_notice(smmu->dev, "\t%u context banks (%u stage-2 only)\n",
smmu->num_context_banks, smmu->num_s2_context_banks);
- /*
- * Cavium CN88xx erratum #27704.
- * Ensure ASID and VMID allocation is unique across all SMMUs in
- * the system.
- */
- if (smmu->model == CAVIUM_SMMUV2) {
- smmu->cavium_id_base =
- atomic_add_return(smmu->num_context_banks,
- &cavium_smmu_context_count);
- smmu->cavium_id_base -= smmu->num_context_banks;
- dev_notice(smmu->dev, "\tenabling workaround for Cavium erratum 27704\n");
- }
smmu->cbs = devm_kcalloc(smmu->dev, smmu->num_context_banks,
sizeof(*smmu->cbs), GFP_KERNEL);
if (!smmu->cbs)
@@ -1884,6 +1870,9 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
dev_notice(smmu->dev, "\tStage-2: %lu-bit IPA -> %lu-bit PA\n",
smmu->ipa_size, smmu->pa_size);
+ if (smmu->impl && smmu->impl->cfg_probe)
+ return smmu->impl->cfg_probe(smmu);
+
return 0;
}
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index 0485ee7fd4c1..e79cb32802e9 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -287,6 +287,7 @@ struct arm_smmu_impl {
u64 (*read_reg64)(struct arm_smmu_device *smmu, int page, int offset);
void (*write_reg64)(struct arm_smmu_device *smmu, int page, int offset,
u64 val);
+ int (*cfg_probe)(struct arm_smmu_device *smmu);
};
static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 14/15] iommu/arm-smmu: Add reset implementation hook
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (12 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 13/15] iommu/arm-smmu: Add configuration implementation hook Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-09 17:07 ` [PATCH 15/15] iommu/arm-smmu: Add context init " Robin Murphy
` (2 subsequent siblings)
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Reset is an activity rife with implementation-defined poking. Add a
corresponding hook, and use it to encapsulate the existing MMU-500
details.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-impl.c | 49 +++++++++++++++++++++++++++++++++++
drivers/iommu/arm-smmu.c | 39 +++-------------------------
drivers/iommu/arm-smmu.h | 1 +
3 files changed, 54 insertions(+), 35 deletions(-)
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index 0b444e476525..c8904da08354 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -4,6 +4,7 @@
#define pr_fmt(fmt) "arm-smmu: " fmt
+#include <linux/bitfield.h>
#include <linux/of.h>
#include "arm-smmu.h"
@@ -67,6 +68,51 @@ const struct arm_smmu_impl cavium_impl = {
};
+#define ARM_MMU500_ACTLR_CPRE (1 << 1)
+
+#define ARM_MMU500_ACR_CACHE_LOCK (1 << 26)
+#define ARM_MMU500_ACR_S2CRB_TLBEN (1 << 10)
+#define ARM_MMU500_ACR_SMTNMB_TLBEN (1 << 8)
+
+static int arm_mmu500_reset(struct arm_smmu_device *smmu)
+{
+ u32 reg, major;
+ int i;
+ /*
+ * On MMU-500 r2p0 onwards we need to clear ACR.CACHE_LOCK before
+ * writes to the context bank ACTLRs will stick. And we just hope that
+ * Secure has also cleared SACR.CACHE_LOCK for this to take effect...
+ */
+ reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_ID7);
+ major = FIELD_GET(ID7_MAJOR, reg);
+ reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sACR);
+ if (major >= 2)
+ reg &= ~ARM_MMU500_ACR_CACHE_LOCK;
+ /*
+ * Allow unmatched Stream IDs to allocate bypass
+ * TLB entries for reduced latency.
+ */
+ reg |= ARM_MMU500_ACR_SMTNMB_TLBEN | ARM_MMU500_ACR_S2CRB_TLBEN;
+ arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sACR, reg);
+
+ /*
+ * Disable MMU-500's not-particularly-beneficial next-page
+ * prefetcher for the sake of errata #841119 and #826419.
+ */
+ for (i = 0; i < smmu->num_context_banks; ++i) {
+ reg = arm_smmu_read_cb(smmu, i, ARM_SMMU_CB_ACTLR);
+ reg &= ~ARM_MMU500_ACTLR_CPRE;
+ arm_smmu_write_cb(smmu, i, ARM_SMMU_CB_ACTLR, reg);
+ }
+
+ return 0;
+}
+
+const struct arm_smmu_impl arm_mmu500_impl = {
+ .reset = arm_mmu500_reset,
+};
+
+
struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
{
/* The current quirks happen to be mutually-exclusive */
@@ -77,5 +123,8 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
if (smmu->model == CAVIUM_SMMUV2)
smmu->impl = &cavium_impl;
+ if (smmu->model == ARM_MMU500)
+ smmu->impl = &arm_mmu500_impl;
+
return smmu;
}
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 80822d48f6c7..298ab9e6a6cd 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -54,12 +54,6 @@
*/
#define QCOM_DUMMY_VAL -1
-#define ARM_MMU500_ACTLR_CPRE (1 << 1)
-
-#define ARM_MMU500_ACR_CACHE_LOCK (1 << 26)
-#define ARM_MMU500_ACR_S2CRB_TLBEN (1 << 10)
-#define ARM_MMU500_ACR_SMTNMB_TLBEN (1 << 8)
-
#define TLB_LOOP_TIMEOUT 1000000 /* 1s! */
#define TLB_SPIN_COUNT 10
@@ -1574,7 +1568,7 @@ static struct iommu_ops arm_smmu_ops = {
static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
{
int i;
- u32 reg, major;
+ u32 reg;
/* clear global FSR */
reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sGFSR);
@@ -1587,38 +1581,10 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
for (i = 0; i < smmu->num_mapping_groups; ++i)
arm_smmu_write_sme(smmu, i);
- if (smmu->model == ARM_MMU500) {
- /*
- * Before clearing ARM_MMU500_ACTLR_CPRE, need to
- * clear CACHE_LOCK bit of ACR first. And, CACHE_LOCK
- * bit is only present in MMU-500r2 onwards.
- */
- reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_ID7);
- major = FIELD_GET(ID7_MAJOR, reg);
- reg = arm_smmu_read_gr0(smmu, ARM_SMMU_GR0_sACR);
- if (major >= 2)
- reg &= ~ARM_MMU500_ACR_CACHE_LOCK;
- /*
- * Allow unmatched Stream IDs to allocate bypass
- * TLB entries for reduced latency.
- */
- reg |= ARM_MMU500_ACR_SMTNMB_TLBEN | ARM_MMU500_ACR_S2CRB_TLBEN;
- arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sACR, reg);
- }
-
/* Make sure all context banks are disabled and clear CB_FSR */
for (i = 0; i < smmu->num_context_banks; ++i) {
arm_smmu_write_context_bank(smmu, i);
arm_smmu_write_cb(smmu, i, ARM_SMMU_CB_FSR, FSR_FAULT);
- /*
- * Disable MMU-500's not-particularly-beneficial next-page
- * prefetcher for the sake of errata #841119 and #826419.
- */
- if (smmu->model == ARM_MMU500) {
- reg = arm_smmu_read_cb(smmu, i, ARM_SMMU_CB_ACTLR);
- reg &= ~ARM_MMU500_ACTLR_CPRE;
- arm_smmu_write_cb(smmu, i, ARM_SMMU_CB_ACTLR, reg);
- }
}
/* Invalidate the TLB, just in case */
@@ -1652,6 +1618,9 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
if (smmu->features & ARM_SMMU_FEAT_EXIDS)
reg |= sCR0_EXIDENABLE;
+ if (smmu->impl && smmu->impl->reset)
+ smmu->impl->reset(smmu);
+
/* Push the button */
arm_smmu_tlb_sync_global(smmu);
arm_smmu_write_gr0(smmu, ARM_SMMU_GR0_sCR0, reg);
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index e79cb32802e9..616cc87a05e3 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -288,6 +288,7 @@ struct arm_smmu_impl {
void (*write_reg64)(struct arm_smmu_device *smmu, int page, int offset,
u64 val);
int (*cfg_probe)(struct arm_smmu_device *smmu);
+ int (*reset)(struct arm_smmu_device *smmu);
};
static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* [PATCH 15/15] iommu/arm-smmu: Add context init implementation hook
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (13 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 14/15] iommu/arm-smmu: Add reset " Robin Murphy
@ 2019-08-09 17:07 ` Robin Murphy
2019-08-13 19:11 ` Krishna Reddy
2019-08-15 10:56 ` Will Deacon
2019-08-09 17:11 ` [PATCH 00/15] Arm SMMU refactoring Robin Murphy
2019-08-15 10:55 ` Will Deacon
16 siblings, 2 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:07 UTC (permalink / raw)
To: will; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Allocating and initialising a context for a domain is another point
where certain implementations are known to want special behaviour.
Currently the other half of the Cavium workaround comes into play here,
so let's finish the job to get the whole thing right out of the way.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-impl.c | 39 +++++++++++++++++++++++++--
drivers/iommu/arm-smmu.c | 51 +++++++----------------------------
drivers/iommu/arm-smmu.h | 42 +++++++++++++++++++++++++++--
3 files changed, 86 insertions(+), 46 deletions(-)
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
index c8904da08354..7a657d47b6ec 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -48,6 +48,12 @@ const struct arm_smmu_impl calxeda_impl = {
};
+struct cavium_smmu {
+ struct arm_smmu_device smmu;
+ u32 id_base;
+};
+#define to_csmmu(s) container_of(s, struct cavium_smmu, smmu)
+
static int cavium_cfg_probe(struct arm_smmu_device *smmu)
{
static atomic_t context_count = ATOMIC_INIT(0);
@@ -56,17 +62,46 @@ static int cavium_cfg_probe(struct arm_smmu_device *smmu)
* Ensure ASID and VMID allocation is unique across all SMMUs in
* the system.
*/
- smmu->cavium_id_base = atomic_fetch_add(smmu->num_context_banks,
+ to_csmmu(smmu)->id_base = atomic_fetch_add(smmu->num_context_banks,
&context_count);
dev_notice(smmu->dev, "\tenabling workaround for Cavium erratum 27704\n");
return 0;
}
+int cavium_init_context(struct arm_smmu_domain *smmu_domain)
+{
+ u32 id_base = to_csmmu(smmu_domain->smmu)->id_base;
+
+ if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
+ smmu_domain->cfg.vmid += id_base;
+ else
+ smmu_domain->cfg.asid += id_base;
+
+ return 0;
+}
+
const struct arm_smmu_impl cavium_impl = {
.cfg_probe = cavium_cfg_probe,
+ .init_context = cavium_init_context,
};
+struct arm_smmu_device *cavium_smmu_impl_init(struct arm_smmu_device *smmu)
+{
+ struct cavium_smmu *csmmu;
+
+ csmmu = devm_kzalloc(smmu->dev, sizeof(*csmmu), GFP_KERNEL);
+ if (!csmmu)
+ return ERR_PTR(-ENOMEM);
+
+ csmmu->smmu = *smmu;
+ csmmu->smmu.impl = &cavium_impl;
+
+ devm_kfree(smmu->dev, smmu);
+
+ return &csmmu->smmu;
+}
+
#define ARM_MMU500_ACTLR_CPRE (1 << 1)
@@ -121,7 +156,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
smmu->impl = &calxeda_impl;
if (smmu->model == CAVIUM_SMMUV2)
- smmu->impl = &cavium_impl;
+ return cavium_smmu_impl_init(smmu);
if (smmu->model == ARM_MMU500)
smmu->impl = &arm_mmu500_impl;
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 298ab9e6a6cd..1c1c9ef91d7b 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -27,7 +27,6 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/io-64-nonatomic-hi-lo.h>
-#include <linux/io-pgtable.h>
#include <linux/iopoll.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
@@ -111,44 +110,6 @@ struct arm_smmu_master_cfg {
#define for_each_cfg_sme(fw, i, idx) \
for (i = 0; idx = fwspec_smendx(fw, i), i < fw->num_ids; ++i)
-enum arm_smmu_context_fmt {
- ARM_SMMU_CTX_FMT_NONE,
- ARM_SMMU_CTX_FMT_AARCH64,
- ARM_SMMU_CTX_FMT_AARCH32_L,
- ARM_SMMU_CTX_FMT_AARCH32_S,
-};
-
-struct arm_smmu_cfg {
- u8 cbndx;
- u8 irptndx;
- union {
- u16 asid;
- u16 vmid;
- };
- enum arm_smmu_cbar_type cbar;
- enum arm_smmu_context_fmt fmt;
-};
-#define INVALID_IRPTNDX 0xff
-
-enum arm_smmu_domain_stage {
- ARM_SMMU_DOMAIN_S1 = 0,
- ARM_SMMU_DOMAIN_S2,
- ARM_SMMU_DOMAIN_NESTED,
- ARM_SMMU_DOMAIN_BYPASS,
-};
-
-struct arm_smmu_domain {
- struct arm_smmu_device *smmu;
- struct io_pgtable_ops *pgtbl_ops;
- const struct iommu_gather_ops *tlb_ops;
- struct arm_smmu_cfg cfg;
- enum arm_smmu_domain_stage stage;
- bool non_strict;
- struct mutex init_mutex; /* Protects smmu pointer */
- spinlock_t cb_lock; /* Serialises ATS1* ops and TLB syncs */
- struct iommu_domain domain;
-};
-
static bool using_legacy_binding, using_generic_binding;
static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
@@ -749,9 +710,16 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
}
if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
- cfg->vmid = cfg->cbndx + 1 + smmu->cavium_id_base;
+ cfg->vmid = cfg->cbndx + 1;
else
- cfg->asid = cfg->cbndx + smmu->cavium_id_base;
+ cfg->asid = cfg->cbndx;
+
+ smmu_domain->smmu = smmu;
+ if (smmu->impl && smmu->impl->init_context) {
+ ret = smmu->impl->init_context(smmu_domain);
+ if (ret)
+ goto out_unlock;
+ }
pgtbl_cfg = (struct io_pgtable_cfg) {
.pgsize_bitmap = smmu->pgsize_bitmap,
@@ -765,7 +733,6 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
if (smmu_domain->non_strict)
pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT;
- smmu_domain->smmu = smmu;
pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
if (!pgtbl_ops) {
ret = -ENOMEM;
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h
index 616cc87a05e3..a18b5925b43c 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -14,6 +14,7 @@
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/device.h>
+#include <linux/io-pgtable.h>
#include <linux/iommu.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
@@ -270,14 +271,50 @@ struct arm_smmu_device {
struct clk_bulk_data *clks;
int num_clks;
- u32 cavium_id_base; /* Specific to Cavium */
-
spinlock_t global_sync_lock;
/* IOMMU core code handle */
struct iommu_device iommu;
};
+enum arm_smmu_context_fmt {
+ ARM_SMMU_CTX_FMT_NONE,
+ ARM_SMMU_CTX_FMT_AARCH64,
+ ARM_SMMU_CTX_FMT_AARCH32_L,
+ ARM_SMMU_CTX_FMT_AARCH32_S,
+};
+
+struct arm_smmu_cfg {
+ u8 cbndx;
+ u8 irptndx;
+ union {
+ u16 asid;
+ u16 vmid;
+ };
+ enum arm_smmu_cbar_type cbar;
+ enum arm_smmu_context_fmt fmt;
+};
+#define INVALID_IRPTNDX 0xff
+
+enum arm_smmu_domain_stage {
+ ARM_SMMU_DOMAIN_S1 = 0,
+ ARM_SMMU_DOMAIN_S2,
+ ARM_SMMU_DOMAIN_NESTED,
+ ARM_SMMU_DOMAIN_BYPASS,
+};
+
+struct arm_smmu_domain {
+ struct arm_smmu_device *smmu;
+ struct io_pgtable_ops *pgtbl_ops;
+ const struct iommu_gather_ops *tlb_ops;
+ struct arm_smmu_cfg cfg;
+ enum arm_smmu_domain_stage stage;
+ bool non_strict;
+ struct mutex init_mutex; /* Protects smmu pointer */
+ spinlock_t cb_lock; /* Serialises ATS1* ops and TLB syncs */
+ struct iommu_domain domain;
+};
+
/* Implementation details, yay! */
struct arm_smmu_impl {
@@ -289,6 +326,7 @@ struct arm_smmu_impl {
u64 val);
int (*cfg_probe)(struct arm_smmu_device *smmu);
int (*reset)(struct arm_smmu_device *smmu);
+ int (*init_context)(struct arm_smmu_domain *smmu_domain);
};
static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply related [flat|nested] 30+ messages in thread* RE: [PATCH 15/15] iommu/arm-smmu: Add context init implementation hook
2019-08-09 17:07 ` [PATCH 15/15] iommu/arm-smmu: Add context init " Robin Murphy
@ 2019-08-13 19:11 ` Krishna Reddy
2019-08-15 10:56 ` Will Deacon
1 sibling, 0 replies; 30+ messages in thread
From: Krishna Reddy @ 2019-08-13 19:11 UTC (permalink / raw)
To: Robin Murphy, will
Cc: gregory.clement, bjorn.andersson, iommu, linux-arm-kernel
Tested-by: Krishna Reddy<vdumpa@nvidia.com>
Validated the entire patch set on Tegra194 SOC based platform and confirmed that arm-smmu driver is functional as it has been.
-KR
-----Original Message-----
From: Robin Murphy <robin.murphy@arm.com>
Sent: Friday, August 9, 2019 10:08 AM
To: will@kernel.org
Cc: iommu@lists.linux-foundation.org; linux-arm-kernel@lists.infradead.org; joro@8bytes.org; vivek.gautam@codeaurora.org; bjorn.andersson@linaro.org; Krishna Reddy <vdumpa@nvidia.com>; gregory.clement@bootlin.com; robdclark@gmail.com
Subject: [PATCH 15/15] iommu/arm-smmu: Add context init implementation hook
Allocating and initialising a context for a domain is another point where certain implementations are known to want special behaviour.
Currently the other half of the Cavium workaround comes into play here, so let's finish the job to get the whole thing right out of the way.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
---
drivers/iommu/arm-smmu-impl.c | 39 +++++++++++++++++++++++++--
drivers/iommu/arm-smmu.c | 51 +++++++----------------------------
drivers/iommu/arm-smmu.h | 42 +++++++++++++++++++++++++++--
3 files changed, 86 insertions(+), 46 deletions(-)
diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c index c8904da08354..7a657d47b6ec 100644
--- a/drivers/iommu/arm-smmu-impl.c
+++ b/drivers/iommu/arm-smmu-impl.c
@@ -48,6 +48,12 @@ const struct arm_smmu_impl calxeda_impl = { };
+struct cavium_smmu {
+ struct arm_smmu_device smmu;
+ u32 id_base;
+};
+#define to_csmmu(s) container_of(s, struct cavium_smmu, smmu)
+
static int cavium_cfg_probe(struct arm_smmu_device *smmu) {
static atomic_t context_count = ATOMIC_INIT(0); @@ -56,17 +62,46 @@ static int cavium_cfg_probe(struct arm_smmu_device *smmu)
* Ensure ASID and VMID allocation is unique across all SMMUs in
* the system.
*/
- smmu->cavium_id_base = atomic_fetch_add(smmu->num_context_banks,
+ to_csmmu(smmu)->id_base = atomic_fetch_add(smmu->num_context_banks,
&context_count);
dev_notice(smmu->dev, "\tenabling workaround for Cavium erratum 27704\n");
return 0;
}
+int cavium_init_context(struct arm_smmu_domain *smmu_domain) {
+ u32 id_base = to_csmmu(smmu_domain->smmu)->id_base;
+
+ if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
+ smmu_domain->cfg.vmid += id_base;
+ else
+ smmu_domain->cfg.asid += id_base;
+
+ return 0;
+}
+
const struct arm_smmu_impl cavium_impl = {
.cfg_probe = cavium_cfg_probe,
+ .init_context = cavium_init_context,
};
+struct arm_smmu_device *cavium_smmu_impl_init(struct arm_smmu_device
+*smmu) {
+ struct cavium_smmu *csmmu;
+
+ csmmu = devm_kzalloc(smmu->dev, sizeof(*csmmu), GFP_KERNEL);
+ if (!csmmu)
+ return ERR_PTR(-ENOMEM);
+
+ csmmu->smmu = *smmu;
+ csmmu->smmu.impl = &cavium_impl;
+
+ devm_kfree(smmu->dev, smmu);
+
+ return &csmmu->smmu;
+}
+
#define ARM_MMU500_ACTLR_CPRE (1 << 1)
@@ -121,7 +156,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
smmu->impl = &calxeda_impl;
if (smmu->model == CAVIUM_SMMUV2)
- smmu->impl = &cavium_impl;
+ return cavium_smmu_impl_init(smmu);
if (smmu->model == ARM_MMU500)
smmu->impl = &arm_mmu500_impl;
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 298ab9e6a6cd..1c1c9ef91d7b 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -27,7 +27,6 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/io-64-nonatomic-hi-lo.h> -#include <linux/io-pgtable.h> #include <linux/iopoll.h> #include <linux/init.h> #include <linux/moduleparam.h> @@ -111,44 +110,6 @@ struct arm_smmu_master_cfg { #define for_each_cfg_sme(fw, i, idx) \
for (i = 0; idx = fwspec_smendx(fw, i), i < fw->num_ids; ++i)
-enum arm_smmu_context_fmt {
- ARM_SMMU_CTX_FMT_NONE,
- ARM_SMMU_CTX_FMT_AARCH64,
- ARM_SMMU_CTX_FMT_AARCH32_L,
- ARM_SMMU_CTX_FMT_AARCH32_S,
-};
-
-struct arm_smmu_cfg {
- u8 cbndx;
- u8 irptndx;
- union {
- u16 asid;
- u16 vmid;
- };
- enum arm_smmu_cbar_type cbar;
- enum arm_smmu_context_fmt fmt;
-};
-#define INVALID_IRPTNDX 0xff
-
-enum arm_smmu_domain_stage {
- ARM_SMMU_DOMAIN_S1 = 0,
- ARM_SMMU_DOMAIN_S2,
- ARM_SMMU_DOMAIN_NESTED,
- ARM_SMMU_DOMAIN_BYPASS,
-};
-
-struct arm_smmu_domain {
- struct arm_smmu_device *smmu;
- struct io_pgtable_ops *pgtbl_ops;
- const struct iommu_gather_ops *tlb_ops;
- struct arm_smmu_cfg cfg;
- enum arm_smmu_domain_stage stage;
- bool non_strict;
- struct mutex init_mutex; /* Protects smmu pointer */
- spinlock_t cb_lock; /* Serialises ATS1* ops and TLB syncs */
- struct iommu_domain domain;
-};
-
static bool using_legacy_binding, using_generic_binding;
static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu) @@ -749,9 +710,16 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
}
if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
- cfg->vmid = cfg->cbndx + 1 + smmu->cavium_id_base;
+ cfg->vmid = cfg->cbndx + 1;
else
- cfg->asid = cfg->cbndx + smmu->cavium_id_base;
+ cfg->asid = cfg->cbndx;
+
+ smmu_domain->smmu = smmu;
+ if (smmu->impl && smmu->impl->init_context) {
+ ret = smmu->impl->init_context(smmu_domain);
+ if (ret)
+ goto out_unlock;
+ }
pgtbl_cfg = (struct io_pgtable_cfg) {
.pgsize_bitmap = smmu->pgsize_bitmap,
@@ -765,7 +733,6 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
if (smmu_domain->non_strict)
pgtbl_cfg.quirks |= IO_PGTABLE_QUIRK_NON_STRICT;
- smmu_domain->smmu = smmu;
pgtbl_ops = alloc_io_pgtable_ops(fmt, &pgtbl_cfg, smmu_domain);
if (!pgtbl_ops) {
ret = -ENOMEM;
diff --git a/drivers/iommu/arm-smmu.h b/drivers/iommu/arm-smmu.h index 616cc87a05e3..a18b5925b43c 100644
--- a/drivers/iommu/arm-smmu.h
+++ b/drivers/iommu/arm-smmu.h
@@ -14,6 +14,7 @@
#include <linux/bits.h>
#include <linux/clk.h>
#include <linux/device.h>
+#include <linux/io-pgtable.h>
#include <linux/iommu.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
@@ -270,14 +271,50 @@ struct arm_smmu_device {
struct clk_bulk_data *clks;
int num_clks;
- u32 cavium_id_base; /* Specific to Cavium */
-
spinlock_t global_sync_lock;
/* IOMMU core code handle */
struct iommu_device iommu;
};
+enum arm_smmu_context_fmt {
+ ARM_SMMU_CTX_FMT_NONE,
+ ARM_SMMU_CTX_FMT_AARCH64,
+ ARM_SMMU_CTX_FMT_AARCH32_L,
+ ARM_SMMU_CTX_FMT_AARCH32_S,
+};
+
+struct arm_smmu_cfg {
+ u8 cbndx;
+ u8 irptndx;
+ union {
+ u16 asid;
+ u16 vmid;
+ };
+ enum arm_smmu_cbar_type cbar;
+ enum arm_smmu_context_fmt fmt;
+};
+#define INVALID_IRPTNDX 0xff
+
+enum arm_smmu_domain_stage {
+ ARM_SMMU_DOMAIN_S1 = 0,
+ ARM_SMMU_DOMAIN_S2,
+ ARM_SMMU_DOMAIN_NESTED,
+ ARM_SMMU_DOMAIN_BYPASS,
+};
+
+struct arm_smmu_domain {
+ struct arm_smmu_device *smmu;
+ struct io_pgtable_ops *pgtbl_ops;
+ const struct iommu_gather_ops *tlb_ops;
+ struct arm_smmu_cfg cfg;
+ enum arm_smmu_domain_stage stage;
+ bool non_strict;
+ struct mutex init_mutex; /* Protects smmu pointer */
+ spinlock_t cb_lock; /* Serialises ATS1* ops and TLB syncs */
+ struct iommu_domain domain;
+};
+
/* Implementation details, yay! */
struct arm_smmu_impl {
@@ -289,6 +326,7 @@ struct arm_smmu_impl {
u64 val);
int (*cfg_probe)(struct arm_smmu_device *smmu);
int (*reset)(struct arm_smmu_device *smmu);
+ int (*init_context)(struct arm_smmu_domain *smmu_domain);
};
static inline void __iomem *arm_smmu_page(struct arm_smmu_device *smmu, int n)
--
2.21.0.dirty
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread* Re: [PATCH 15/15] iommu/arm-smmu: Add context init implementation hook
2019-08-09 17:07 ` [PATCH 15/15] iommu/arm-smmu: Add context init " Robin Murphy
2019-08-13 19:11 ` Krishna Reddy
@ 2019-08-15 10:56 ` Will Deacon
2019-08-15 12:09 ` Robin Murphy
1 sibling, 1 reply; 30+ messages in thread
From: Will Deacon @ 2019-08-15 10:56 UTC (permalink / raw)
To: Robin Murphy; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On Fri, Aug 09, 2019 at 06:07:52PM +0100, Robin Murphy wrote:
> Allocating and initialising a context for a domain is another point
> where certain implementations are known to want special behaviour.
> Currently the other half of the Cavium workaround comes into play here,
> so let's finish the job to get the whole thing right out of the way.
>
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
> drivers/iommu/arm-smmu-impl.c | 39 +++++++++++++++++++++++++--
> drivers/iommu/arm-smmu.c | 51 +++++++----------------------------
> drivers/iommu/arm-smmu.h | 42 +++++++++++++++++++++++++++--
> 3 files changed, 86 insertions(+), 46 deletions(-)
>
> diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
> index c8904da08354..7a657d47b6ec 100644
> --- a/drivers/iommu/arm-smmu-impl.c
> +++ b/drivers/iommu/arm-smmu-impl.c
> @@ -48,6 +48,12 @@ const struct arm_smmu_impl calxeda_impl = {
> };
>
>
> +struct cavium_smmu {
> + struct arm_smmu_device smmu;
> + u32 id_base;
> +};
> +#define to_csmmu(s) container_of(s, struct cavium_smmu, smmu)
To be honest with you, I'd just use container_of directly for the two
callsites that need it. "to_csmmu" isn't a great name when we're also got
the calxeda thing in here.
> static int cavium_cfg_probe(struct arm_smmu_device *smmu)
> {
> static atomic_t context_count = ATOMIC_INIT(0);
> @@ -56,17 +62,46 @@ static int cavium_cfg_probe(struct arm_smmu_device *smmu)
> * Ensure ASID and VMID allocation is unique across all SMMUs in
> * the system.
> */
> - smmu->cavium_id_base = atomic_fetch_add(smmu->num_context_banks,
> + to_csmmu(smmu)->id_base = atomic_fetch_add(smmu->num_context_banks,
> &context_count);
> dev_notice(smmu->dev, "\tenabling workaround for Cavium erratum 27704\n");
>
> return 0;
> }
>
> +int cavium_init_context(struct arm_smmu_domain *smmu_domain)
> +{
> + u32 id_base = to_csmmu(smmu_domain->smmu)->id_base;
> +
> + if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
> + smmu_domain->cfg.vmid += id_base;
> + else
> + smmu_domain->cfg.asid += id_base;
> +
> + return 0;
> +}
> +
> const struct arm_smmu_impl cavium_impl = {
> .cfg_probe = cavium_cfg_probe,
> + .init_context = cavium_init_context,
> };
>
> +struct arm_smmu_device *cavium_smmu_impl_init(struct arm_smmu_device *smmu)
> +{
> + struct cavium_smmu *csmmu;
> +
> + csmmu = devm_kzalloc(smmu->dev, sizeof(*csmmu), GFP_KERNEL);
> + if (!csmmu)
> + return ERR_PTR(-ENOMEM);
> +
> + csmmu->smmu = *smmu;
> + csmmu->smmu.impl = &cavium_impl;
> +
> + devm_kfree(smmu->dev, smmu);
> +
> + return &csmmu->smmu;
> +}
> +
>
> #define ARM_MMU500_ACTLR_CPRE (1 << 1)
>
> @@ -121,7 +156,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
> smmu->impl = &calxeda_impl;
>
> if (smmu->model == CAVIUM_SMMUV2)
> - smmu->impl = &cavium_impl;
> + return cavium_smmu_impl_init(smmu);
>
> if (smmu->model == ARM_MMU500)
> smmu->impl = &arm_mmu500_impl;
Maybe rework this so we do the calxeda detection first (and return if we
match), followed by a switch on smmu->model to make it crystal clear that
we match only one?
Will
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread* Re: [PATCH 15/15] iommu/arm-smmu: Add context init implementation hook
2019-08-15 10:56 ` Will Deacon
@ 2019-08-15 12:09 ` Robin Murphy
2019-08-15 15:09 ` Jordan Crouse
0 siblings, 1 reply; 30+ messages in thread
From: Robin Murphy @ 2019-08-15 12:09 UTC (permalink / raw)
To: Will Deacon; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
On 15/08/2019 11:56, Will Deacon wrote:
> On Fri, Aug 09, 2019 at 06:07:52PM +0100, Robin Murphy wrote:
>> Allocating and initialising a context for a domain is another point
>> where certain implementations are known to want special behaviour.
>> Currently the other half of the Cavium workaround comes into play here,
>> so let's finish the job to get the whole thing right out of the way.
>>
>> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
>> ---
>> drivers/iommu/arm-smmu-impl.c | 39 +++++++++++++++++++++++++--
>> drivers/iommu/arm-smmu.c | 51 +++++++----------------------------
>> drivers/iommu/arm-smmu.h | 42 +++++++++++++++++++++++++++--
>> 3 files changed, 86 insertions(+), 46 deletions(-)
>>
>> diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
>> index c8904da08354..7a657d47b6ec 100644
>> --- a/drivers/iommu/arm-smmu-impl.c
>> +++ b/drivers/iommu/arm-smmu-impl.c
>> @@ -48,6 +48,12 @@ const struct arm_smmu_impl calxeda_impl = {
>> };
>>
>>
>> +struct cavium_smmu {
>> + struct arm_smmu_device smmu;
>> + u32 id_base;
>> +};
>> +#define to_csmmu(s) container_of(s, struct cavium_smmu, smmu)
>
> To be honest with you, I'd just use container_of directly for the two
> callsites that need it. "to_csmmu" isn't a great name when we're also got
> the calxeda thing in here.
Sure, by this point I was mostly just going for completeness in terms of
sketching out an example for subclassing arm_smmu_device. The Tegra
patches will now serve as a more complete example anyway, so indeed we
can live without it here.
>> static int cavium_cfg_probe(struct arm_smmu_device *smmu)
>> {
>> static atomic_t context_count = ATOMIC_INIT(0);
>> @@ -56,17 +62,46 @@ static int cavium_cfg_probe(struct arm_smmu_device *smmu)
>> * Ensure ASID and VMID allocation is unique across all SMMUs in
>> * the system.
>> */
>> - smmu->cavium_id_base = atomic_fetch_add(smmu->num_context_banks,
>> + to_csmmu(smmu)->id_base = atomic_fetch_add(smmu->num_context_banks,
>> &context_count);
>> dev_notice(smmu->dev, "\tenabling workaround for Cavium erratum 27704\n");
>>
>> return 0;
>> }
>>
>> +int cavium_init_context(struct arm_smmu_domain *smmu_domain)
>> +{
>> + u32 id_base = to_csmmu(smmu_domain->smmu)->id_base;
>> +
>> + if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
>> + smmu_domain->cfg.vmid += id_base;
>> + else
>> + smmu_domain->cfg.asid += id_base;
>> +
>> + return 0;
>> +}
>> +
>> const struct arm_smmu_impl cavium_impl = {
>> .cfg_probe = cavium_cfg_probe,
>> + .init_context = cavium_init_context,
>> };
>>
>> +struct arm_smmu_device *cavium_smmu_impl_init(struct arm_smmu_device *smmu)
>> +{
>> + struct cavium_smmu *csmmu;
>> +
>> + csmmu = devm_kzalloc(smmu->dev, sizeof(*csmmu), GFP_KERNEL);
>> + if (!csmmu)
>> + return ERR_PTR(-ENOMEM);
>> +
>> + csmmu->smmu = *smmu;
>> + csmmu->smmu.impl = &cavium_impl;
>> +
>> + devm_kfree(smmu->dev, smmu);
>> +
>> + return &csmmu->smmu;
>> +}
>> +
>>
>> #define ARM_MMU500_ACTLR_CPRE (1 << 1)
>>
>> @@ -121,7 +156,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
>> smmu->impl = &calxeda_impl;
>>
>> if (smmu->model == CAVIUM_SMMUV2)
>> - smmu->impl = &cavium_impl;
>> + return cavium_smmu_impl_init(smmu);
>>
>> if (smmu->model == ARM_MMU500)
>> smmu->impl = &arm_mmu500_impl;
>
> Maybe rework this so we do the calxeda detection first (and return if we
> match), followed by a switch on smmu->model to make it crystal clear that
> we match only one?
As I see it, "match only one" is really only a short-term thing, though,
so I didn't want to get *too* hung up on it. Ultimately we're going to
have cases where we need to combine e.g. MMU-500 implementation quirks
with platform integration quirks - I've been mostly planning on coming
back to think about that (and potentially rework this whole logic)
later, but I guess it wouldn't hurt to plan out a bit more structure
from the start.
I'll have a hack on that (and all the other comments) today and
hopefully have a v2 by tomorrow.
Robin.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread* Re: [PATCH 15/15] iommu/arm-smmu: Add context init implementation hook
2019-08-15 12:09 ` Robin Murphy
@ 2019-08-15 15:09 ` Jordan Crouse
0 siblings, 0 replies; 30+ messages in thread
From: Jordan Crouse @ 2019-08-15 15:09 UTC (permalink / raw)
To: Robin Murphy
Cc: iommu, Will Deacon, gregory.clement, linux-arm-kernel, bjorn.andersson
On Thu, Aug 15, 2019 at 01:09:07PM +0100, Robin Murphy wrote:
> On 15/08/2019 11:56, Will Deacon wrote:
> >On Fri, Aug 09, 2019 at 06:07:52PM +0100, Robin Murphy wrote:
> >>Allocating and initialising a context for a domain is another point
> >>where certain implementations are known to want special behaviour.
> >>Currently the other half of the Cavium workaround comes into play here,
> >>so let's finish the job to get the whole thing right out of the way.
> >>
> >>Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> >>---
> >> drivers/iommu/arm-smmu-impl.c | 39 +++++++++++++++++++++++++--
> >> drivers/iommu/arm-smmu.c | 51 +++++++----------------------------
> >> drivers/iommu/arm-smmu.h | 42 +++++++++++++++++++++++++++--
> >> 3 files changed, 86 insertions(+), 46 deletions(-)
> >>
> >>diff --git a/drivers/iommu/arm-smmu-impl.c b/drivers/iommu/arm-smmu-impl.c
> >>index c8904da08354..7a657d47b6ec 100644
> >>--- a/drivers/iommu/arm-smmu-impl.c
> >>+++ b/drivers/iommu/arm-smmu-impl.c
> >>@@ -48,6 +48,12 @@ const struct arm_smmu_impl calxeda_impl = {
> >> };
> >>+struct cavium_smmu {
> >>+ struct arm_smmu_device smmu;
> >>+ u32 id_base;
> >>+};
> >>+#define to_csmmu(s) container_of(s, struct cavium_smmu, smmu)
> >
> >To be honest with you, I'd just use container_of directly for the two
> >callsites that need it. "to_csmmu" isn't a great name when we're also got
> >the calxeda thing in here.
>
> Sure, by this point I was mostly just going for completeness in terms of
> sketching out an example for subclassing arm_smmu_device. The Tegra patches
> will now serve as a more complete example anyway, so indeed we can live
> without it here.
>
> >> static int cavium_cfg_probe(struct arm_smmu_device *smmu)
> >> {
> >> static atomic_t context_count = ATOMIC_INIT(0);
> >>@@ -56,17 +62,46 @@ static int cavium_cfg_probe(struct arm_smmu_device *smmu)
> >> * Ensure ASID and VMID allocation is unique across all SMMUs in
> >> * the system.
> >> */
> >>- smmu->cavium_id_base = atomic_fetch_add(smmu->num_context_banks,
> >>+ to_csmmu(smmu)->id_base = atomic_fetch_add(smmu->num_context_banks,
> >> &context_count);
> >> dev_notice(smmu->dev, "\tenabling workaround for Cavium erratum 27704\n");
> >> return 0;
> >> }
> >>+int cavium_init_context(struct arm_smmu_domain *smmu_domain)
> >>+{
> >>+ u32 id_base = to_csmmu(smmu_domain->smmu)->id_base;
> >>+
> >>+ if (smmu_domain->stage == ARM_SMMU_DOMAIN_S2)
> >>+ smmu_domain->cfg.vmid += id_base;
> >>+ else
> >>+ smmu_domain->cfg.asid += id_base;
> >>+
> >>+ return 0;
> >>+}
> >>+
> >> const struct arm_smmu_impl cavium_impl = {
> >> .cfg_probe = cavium_cfg_probe,
> >>+ .init_context = cavium_init_context,
> >> };
> >>+struct arm_smmu_device *cavium_smmu_impl_init(struct arm_smmu_device *smmu)
> >>+{
> >>+ struct cavium_smmu *csmmu;
> >>+
> >>+ csmmu = devm_kzalloc(smmu->dev, sizeof(*csmmu), GFP_KERNEL);
> >>+ if (!csmmu)
> >>+ return ERR_PTR(-ENOMEM);
> >>+
> >>+ csmmu->smmu = *smmu;
> >>+ csmmu->smmu.impl = &cavium_impl;
> >>+
> >>+ devm_kfree(smmu->dev, smmu);
> >>+
> >>+ return &csmmu->smmu;
> >>+}
> >>+
> >> #define ARM_MMU500_ACTLR_CPRE (1 << 1)
> >>@@ -121,7 +156,7 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
> >> smmu->impl = &calxeda_impl;
> >> if (smmu->model == CAVIUM_SMMUV2)
> >>- smmu->impl = &cavium_impl;
> >>+ return cavium_smmu_impl_init(smmu);
> >> if (smmu->model == ARM_MMU500)
> >> smmu->impl = &arm_mmu500_impl;
> >
> >Maybe rework this so we do the calxeda detection first (and return if we
> >match), followed by a switch on smmu->model to make it crystal clear that
> >we match only one?
>
> As I see it, "match only one" is really only a short-term thing, though, so
> I didn't want to get *too* hung up on it. Ultimately we're going to have
> cases where we need to combine e.g. MMU-500 implementation quirks with
> platform integration quirks - I've been mostly planning on coming back to
> think about that (and potentially rework this whole logic) later, but I
> guess it wouldn't hurt to plan out a bit more structure from the start.
I was going to ask something similar. I'm guessing that the intent is that
we'll eventually we'll have a couple of arm-smmu-<vendor>.c files
and we'll need some sort of centralized place to set up the smmu->impl pointer.
I had figured that it would be table based or something, but you make a good
point about mixing and matching different workarounds. I don't really have
a solution, just something I'm pondering while I'm thinking about how to start
merging some of the qcom stuff into this.
Jordan
--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread
* Re: [PATCH 00/15] Arm SMMU refactoring
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (14 preceding siblings ...)
2019-08-09 17:07 ` [PATCH 15/15] iommu/arm-smmu: Add context init " Robin Murphy
@ 2019-08-09 17:11 ` Robin Murphy
2019-08-15 10:55 ` Will Deacon
16 siblings, 0 replies; 30+ messages in thread
From: Robin Murphy @ 2019-08-09 17:11 UTC (permalink / raw)
To: will; +Cc: gregory.clement, iommu, bjorn.andersson, linux-arm-kernel
...and of course I had to forget someone's cc - sorry Jordan! :(
Robin.
On 09/08/2019 18:07, Robin Murphy wrote:
> Hi all,
>
> This is a big refactoring of arm-smmu in order to help cope with the
> various divergent implementation details currently flying around. So
> far we've been accruing various quirks and errata workarounds within
> the main flow of the driver, but given that it's written to an
> architecture rather than any particular hardware implementation, after
> a point these start to become increasingly invasive and potentially
> conflict with each other.
>
> These patches clean up the existing quirks handled by the driver to
> lay a foundation on which we can continue to add more in a maintainable
> fashion. The idea is that major vendor customisations can then be kept
> in arm-smmu-<vendor>.c implementation files out of each others' way.
>
> A branch is available at:
>
> git://linux-arm.org/linux-rm iommu/smmu-impl
>
> which I'll probably keep tweaking until I'm happy with the names of
> things; I just didn't want to delay this initial posting any lomnger.
>
> Robin.
>
>
> Robin Murphy (15):
> iommu/arm-smmu: Convert GR0 registers to bitfields
> iommu/arm-smmu: Convert GR1 registers to bitfields
> iommu/arm-smmu: Convert context bank registers to bitfields
> iommu/arm-smmu: Rework cb_base handling
> iommu/arm-smmu: Split arm_smmu_tlb_inv_range_nosync()
> iommu/arm-smmu: Get rid of weird "atomic" write
> iommu/arm-smmu: Abstract GR1 accesses
> iommu/arm-smmu: Abstract context bank accesses
> iommu/arm-smmu: Abstract GR0 accesses
> iommu/arm-smmu: Rename arm-smmu-regs.h
> iommu/arm-smmu: Add implementation infrastructure
> iommu/arm-smmu: Move Secure access quirk to implementation
> iommu/arm-smmu: Add configuration implementation hook
> iommu/arm-smmu: Add reset implementation hook
> iommu/arm-smmu: Add context init implementation hook
>
> MAINTAINERS | 3 +-
> drivers/iommu/Makefile | 2 +-
> drivers/iommu/arm-smmu-impl.c | 165 ++++++++++
> drivers/iommu/arm-smmu-regs.h | 210 -------------
> drivers/iommu/arm-smmu.c | 570 +++++++++++-----------------------
> drivers/iommu/arm-smmu.h | 386 +++++++++++++++++++++++
> drivers/iommu/qcom_iommu.c | 15 +-
> 7 files changed, 743 insertions(+), 608 deletions(-)
> create mode 100644 drivers/iommu/arm-smmu-impl.c
> delete mode 100644 drivers/iommu/arm-smmu-regs.h
> create mode 100644 drivers/iommu/arm-smmu.h
>
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread* Re: [PATCH 00/15] Arm SMMU refactoring
2019-08-09 17:07 [PATCH 00/15] Arm SMMU refactoring Robin Murphy
` (15 preceding siblings ...)
2019-08-09 17:11 ` [PATCH 00/15] Arm SMMU refactoring Robin Murphy
@ 2019-08-15 10:55 ` Will Deacon
16 siblings, 0 replies; 30+ messages in thread
From: Will Deacon @ 2019-08-15 10:55 UTC (permalink / raw)
To: Robin Murphy; +Cc: bjorn.andersson, iommu, gregory.clement, linux-arm-kernel
Hi Robin,
On Fri, Aug 09, 2019 at 06:07:37PM +0100, Robin Murphy wrote:
> This is a big refactoring of arm-smmu in order to help cope with the
> various divergent implementation details currently flying around. So
> far we've been accruing various quirks and errata workarounds within
> the main flow of the driver, but given that it's written to an
> architecture rather than any particular hardware implementation, after
> a point these start to become increasingly invasive and potentially
> conflict with each other.
>
> These patches clean up the existing quirks handled by the driver to
> lay a foundation on which we can continue to add more in a maintainable
> fashion. The idea is that major vendor customisations can then be kept
> in arm-smmu-<vendor>.c implementation files out of each others' way.
>
> A branch is available at:
>
> git://linux-arm.org/linux-rm iommu/smmu-impl
>
> which I'll probably keep tweaking until I'm happy with the names of
> things; I just didn't want to delay this initial posting any lomnger.
Thanks, this all looks pretty decent to me. I've mainly left you a bunch
of nits (hey, it's a refactoring series!) but I did spot one pre-existing
howler that we should address.
When do you think you'll have stopped tweaking this so that I can pick it
up? I'd really like to see it in 5.4 so that others can start working on
top of it.
Cheers,
Will
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
^ permalink raw reply [flat|nested] 30+ messages in thread