* [PATCH v3 1/7] iommu/arm-smmu-v3: Clean up address masking
[not found] ` <cover.1522065583.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
@ 2018-03-26 12:35 ` Robin Murphy
2018-03-26 12:35 ` [PATCH v3 2/7] iommu/arm-smmu-v3: Clean up register definitions Robin Murphy
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2018-03-26 12:35 UTC (permalink / raw)
To: will.deacon-5wv7dgnIgG8, joro-zLv9SwRftAIdnm+yROfE0A
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Before trying to add the SMMUv3.1 support for 52-bit addresses, make
things bearable by cleaning up the various address mask definitions to
use GENMASK_ULL() consistently. The fact that doing so reveals (and
fixes) a latent off-by-one in Q_BASE_ADDR_MASK only goes to show what a
jolly good idea it is...
Tested-by: Nate Watterson <nwatters-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
v3: No change
drivers/iommu/arm-smmu-v3.c | 53 ++++++++++++++++++---------------------------
1 file changed, 21 insertions(+), 32 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 3f2f1fc68b52..ac437aedc598 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -22,6 +22,7 @@
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
+#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/dma-iommu.h>
#include <linux/err.h>
@@ -158,8 +159,7 @@
#define ARM_SMMU_STRTAB_BASE 0x80
#define STRTAB_BASE_RA (1UL << 62)
-#define STRTAB_BASE_ADDR_SHIFT 6
-#define STRTAB_BASE_ADDR_MASK 0x3ffffffffffUL
+#define STRTAB_BASE_ADDR_MASK GENMASK_ULL(47, 6)
#define ARM_SMMU_STRTAB_BASE_CFG 0x88
#define STRTAB_BASE_CFG_LOG2SIZE_SHIFT 0
@@ -190,8 +190,7 @@
#define ARM_SMMU_PRIQ_IRQ_CFG2 0xdc
/* Common MSI config fields */
-#define MSI_CFG0_ADDR_SHIFT 2
-#define MSI_CFG0_ADDR_MASK 0x3fffffffffffUL
+#define MSI_CFG0_ADDR_MASK GENMASK_ULL(47, 2)
#define MSI_CFG2_SH_SHIFT 4
#define MSI_CFG2_SH_NSH (0UL << MSI_CFG2_SH_SHIFT)
#define MSI_CFG2_SH_OSH (2UL << MSI_CFG2_SH_SHIFT)
@@ -207,8 +206,7 @@
Q_IDX(q, p) * (q)->ent_dwords)
#define Q_BASE_RWA (1UL << 62)
-#define Q_BASE_ADDR_SHIFT 5
-#define Q_BASE_ADDR_MASK 0xfffffffffffUL
+#define Q_BASE_ADDR_MASK GENMASK_ULL(47, 5)
#define Q_BASE_LOG2SIZE_SHIFT 0
#define Q_BASE_LOG2SIZE_MASK 0x1fUL
@@ -225,8 +223,7 @@
#define STRTAB_L1_DESC_DWORDS 1
#define STRTAB_L1_DESC_SPAN_SHIFT 0
#define STRTAB_L1_DESC_SPAN_MASK 0x1fUL
-#define STRTAB_L1_DESC_L2PTR_SHIFT 6
-#define STRTAB_L1_DESC_L2PTR_MASK 0x3ffffffffffUL
+#define STRTAB_L1_DESC_L2PTR_MASK GENMASK_ULL(47, 6)
#define STRTAB_STE_DWORDS 8
#define STRTAB_STE_0_V (1UL << 0)
@@ -239,8 +236,7 @@
#define STRTAB_STE_0_S1FMT_SHIFT 4
#define STRTAB_STE_0_S1FMT_LINEAR (0UL << STRTAB_STE_0_S1FMT_SHIFT)
-#define STRTAB_STE_0_S1CTXPTR_SHIFT 6
-#define STRTAB_STE_0_S1CTXPTR_MASK 0x3ffffffffffUL
+#define STRTAB_STE_0_S1CTXPTR_MASK GENMASK_ULL(47, 6)
#define STRTAB_STE_0_S1CDMAX_SHIFT 59
#define STRTAB_STE_0_S1CDMAX_MASK 0x1fUL
@@ -278,8 +274,7 @@
#define STRTAB_STE_2_S2PTW (1UL << 54)
#define STRTAB_STE_2_S2R (1UL << 58)
-#define STRTAB_STE_3_S2TTB_SHIFT 4
-#define STRTAB_STE_3_S2TTB_MASK 0xfffffffffffUL
+#define STRTAB_STE_3_S2TTB_MASK GENMASK_ULL(47, 4)
/* Context descriptor (stage-1 only) */
#define CTXDESC_CD_DWORDS 8
@@ -325,8 +320,7 @@
#define CTXDESC_CD_0_ASID_SHIFT 48
#define CTXDESC_CD_0_ASID_MASK 0xffffUL
-#define CTXDESC_CD_1_TTB0_SHIFT 4
-#define CTXDESC_CD_1_TTB0_MASK 0xfffffffffffUL
+#define CTXDESC_CD_1_TTB0_MASK GENMASK_ULL(47, 4)
#define CTXDESC_CD_3_MAIR_SHIFT 0
@@ -351,7 +345,7 @@
#define CMDQ_PREFETCH_0_SID_SHIFT 32
#define CMDQ_PREFETCH_1_SIZE_SHIFT 0
-#define CMDQ_PREFETCH_1_ADDR_MASK ~0xfffUL
+#define CMDQ_PREFETCH_1_ADDR_MASK GENMASK_ULL(63, 12)
#define CMDQ_CFGI_0_SID_SHIFT 32
#define CMDQ_CFGI_0_SID_MASK 0xffffffffUL
@@ -362,8 +356,8 @@
#define CMDQ_TLBI_0_VMID_SHIFT 32
#define CMDQ_TLBI_0_ASID_SHIFT 48
#define CMDQ_TLBI_1_LEAF (1UL << 0)
-#define CMDQ_TLBI_1_VA_MASK ~0xfffUL
-#define CMDQ_TLBI_1_IPA_MASK 0xfffffffff000UL
+#define CMDQ_TLBI_1_VA_MASK GENMASK_ULL(63, 12)
+#define CMDQ_TLBI_1_IPA_MASK GENMASK_ULL(47, 12)
#define CMDQ_PRI_0_SSID_SHIFT 12
#define CMDQ_PRI_0_SSID_MASK 0xfffffUL
@@ -386,8 +380,7 @@
#define CMDQ_SYNC_0_MSIATTR_OIWB (0xfUL << CMDQ_SYNC_0_MSIATTR_SHIFT)
#define CMDQ_SYNC_0_MSIDATA_SHIFT 32
#define CMDQ_SYNC_0_MSIDATA_MASK 0xffffffffUL
-#define CMDQ_SYNC_1_MSIADDR_SHIFT 0
-#define CMDQ_SYNC_1_MSIADDR_MASK 0xffffffffffffcUL
+#define CMDQ_SYNC_1_MSIADDR_MASK GENMASK_ULL(47, 2)
/* Event queue */
#define EVTQ_ENT_DWORDS 4
@@ -413,8 +406,7 @@
#define PRIQ_1_PRG_IDX_SHIFT 0
#define PRIQ_1_PRG_IDX_MASK 0x1ffUL
-#define PRIQ_1_ADDR_SHIFT 12
-#define PRIQ_1_ADDR_MASK 0xfffffffffffffUL
+#define PRIQ_1_ADDR_MASK GENMASK_ULL(63, 12)
/* High-level queue structures */
#define ARM_SMMU_POLL_TIMEOUT_US 100
@@ -1093,7 +1085,7 @@ static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu,
cfg->cdptr[0] = cpu_to_le64(val);
- val = cfg->cd.ttbr & CTXDESC_CD_1_TTB0_MASK << CTXDESC_CD_1_TTB0_SHIFT;
+ val = cfg->cd.ttbr & CTXDESC_CD_1_TTB0_MASK;
cfg->cdptr[1] = cpu_to_le64(val);
cfg->cdptr[3] = cpu_to_le64(cfg->cd.mair << CTXDESC_CD_3_MAIR_SHIFT);
@@ -1107,8 +1099,7 @@ arm_smmu_write_strtab_l1_desc(__le64 *dst, struct arm_smmu_strtab_l1_desc *desc)
val |= (desc->span & STRTAB_L1_DESC_SPAN_MASK)
<< STRTAB_L1_DESC_SPAN_SHIFT;
- val |= desc->l2ptr_dma &
- STRTAB_L1_DESC_L2PTR_MASK << STRTAB_L1_DESC_L2PTR_SHIFT;
+ val |= desc->l2ptr_dma & STRTAB_L1_DESC_L2PTR_MASK;
*dst = cpu_to_le64(val);
}
@@ -1214,8 +1205,7 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_device *smmu, u32 sid,
!(smmu->features & ARM_SMMU_FEAT_STALL_FORCE))
dst[1] |= cpu_to_le64(STRTAB_STE_1_S1STALLD);
- val |= (ste->s1_cfg->cdptr_dma & STRTAB_STE_0_S1CTXPTR_MASK
- << STRTAB_STE_0_S1CTXPTR_SHIFT) |
+ val |= (ste->s1_cfg->cdptr_dma & STRTAB_STE_0_S1CTXPTR_MASK) |
STRTAB_STE_0_CFG_S1_TRANS;
}
@@ -1232,7 +1222,7 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_device *smmu, u32 sid,
STRTAB_STE_2_S2R);
dst[3] = cpu_to_le64(ste->s2_cfg->vttbr &
- STRTAB_STE_3_S2TTB_MASK << STRTAB_STE_3_S2TTB_SHIFT);
+ STRTAB_STE_3_S2TTB_MASK);
val |= STRTAB_STE_0_CFG_S2_TRANS;
}
@@ -1337,7 +1327,7 @@ static void arm_smmu_handle_ppr(struct arm_smmu_device *smmu, u64 *evt)
evt[0] & PRIQ_0_PERM_READ ? "R" : "",
evt[0] & PRIQ_0_PERM_WRITE ? "W" : "",
evt[0] & PRIQ_0_PERM_EXEC ? "X" : "",
- evt[1] & PRIQ_1_ADDR_MASK << PRIQ_1_ADDR_SHIFT);
+ evt[1] & PRIQ_1_ADDR_MASK);
if (last) {
struct arm_smmu_cmdq_ent cmd = {
@@ -2102,7 +2092,7 @@ static int arm_smmu_init_one_queue(struct arm_smmu_device *smmu,
q->ent_dwords = dwords;
q->q_base = Q_BASE_RWA;
- q->q_base |= q->base_dma & Q_BASE_ADDR_MASK << Q_BASE_ADDR_SHIFT;
+ q->q_base |= q->base_dma & Q_BASE_ADDR_MASK;
q->q_base |= (q->max_n_shift & Q_BASE_LOG2SIZE_MASK)
<< Q_BASE_LOG2SIZE_SHIFT;
@@ -2239,8 +2229,7 @@ static int arm_smmu_init_strtab(struct arm_smmu_device *smmu)
return ret;
/* Set the strtab base address */
- reg = smmu->strtab_cfg.strtab_dma &
- STRTAB_BASE_ADDR_MASK << STRTAB_BASE_ADDR_SHIFT;
+ reg = smmu->strtab_cfg.strtab_dma & STRTAB_BASE_ADDR_MASK;
reg |= STRTAB_BASE_RA;
smmu->strtab_cfg.strtab_base = reg;
@@ -2303,7 +2292,7 @@ static void arm_smmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
phys_addr_t *cfg = arm_smmu_msi_cfg[desc->platform.msi_index];
doorbell = (((u64)msg->address_hi) << 32) | msg->address_lo;
- doorbell &= MSI_CFG0_ADDR_MASK << MSI_CFG0_ADDR_SHIFT;
+ doorbell &= MSI_CFG0_ADDR_MASK;
writeq_relaxed(doorbell, smmu->base + cfg[0]);
writel_relaxed(msg->data, smmu->base + cfg[1]);
--
2.16.1.dirty
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 2/7] iommu/arm-smmu-v3: Clean up register definitions
[not found] ` <cover.1522065583.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2018-03-26 12:35 ` [PATCH v3 1/7] iommu/arm-smmu-v3: Clean up address masking Robin Murphy
@ 2018-03-26 12:35 ` Robin Murphy
2018-03-26 12:35 ` [PATCH v3 3/7] iommu/arm-smmu-v3: Clean up table definitions Robin Murphy
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2018-03-26 12:35 UTC (permalink / raw)
To: will.deacon-5wv7dgnIgG8, joro-zLv9SwRftAIdnm+yROfE0A
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
The FIELD_{GET,PREP} accessors provided by linux/bitfield.h allow us to
define multi-bit register fields solely in terms of their bit positions
via GENMASK(), without needing explicit *_SHIFT and *_MASK definitions.
As well as the immediate reduction in lines of code, this avoids the
awkwardness of values sometimes being pre-shifted and sometimes not,
which means we can factor out some common values like memory attributes.
Furthermore, it also makes it trivial to verify the definitions against
the architecture spec, on which note let's also fix up a few field names
to properly match the current release (IHI0070B).
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
v3: New
drivers/iommu/arm-smmu-v3.c | 174 ++++++++++++++++++++------------------------
1 file changed, 77 insertions(+), 97 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index ac437aedc598..40a19ce03f99 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -22,6 +22,7 @@
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
+#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/dma-iommu.h>
@@ -44,18 +45,15 @@
/* MMIO registers */
#define ARM_SMMU_IDR0 0x0
-#define IDR0_ST_LVL_SHIFT 27
-#define IDR0_ST_LVL_MASK 0x3
-#define IDR0_ST_LVL_2LVL (1 << IDR0_ST_LVL_SHIFT)
-#define IDR0_STALL_MODEL_SHIFT 24
-#define IDR0_STALL_MODEL_MASK 0x3
-#define IDR0_STALL_MODEL_STALL (0 << IDR0_STALL_MODEL_SHIFT)
-#define IDR0_STALL_MODEL_FORCE (2 << IDR0_STALL_MODEL_SHIFT)
-#define IDR0_TTENDIAN_SHIFT 21
-#define IDR0_TTENDIAN_MASK 0x3
-#define IDR0_TTENDIAN_LE (2 << IDR0_TTENDIAN_SHIFT)
-#define IDR0_TTENDIAN_BE (3 << IDR0_TTENDIAN_SHIFT)
-#define IDR0_TTENDIAN_MIXED (0 << IDR0_TTENDIAN_SHIFT)
+#define IDR0_ST_LVL GENMASK(28, 27)
+#define IDR0_ST_LVL_2LVL 1
+#define IDR0_STALL_MODEL GENMASK(25, 24)
+#define IDR0_STALL_MODEL_STALL 0
+#define IDR0_STALL_MODEL_FORCE 2
+#define IDR0_TTENDIAN GENMASK(22, 21)
+#define IDR0_TTENDIAN_MIXED 0
+#define IDR0_TTENDIAN_LE 2
+#define IDR0_TTENDIAN_BE 3
#define IDR0_CD2L (1 << 19)
#define IDR0_VMID16 (1 << 18)
#define IDR0_PRI (1 << 16)
@@ -65,10 +63,9 @@
#define IDR0_ATS (1 << 10)
#define IDR0_HYP (1 << 9)
#define IDR0_COHACC (1 << 4)
-#define IDR0_TTF_SHIFT 2
-#define IDR0_TTF_MASK 0x3
-#define IDR0_TTF_AARCH64 (2 << IDR0_TTF_SHIFT)
-#define IDR0_TTF_AARCH32_64 (3 << IDR0_TTF_SHIFT)
+#define IDR0_TTF GENMASK(3, 2)
+#define IDR0_TTF_AARCH64 2
+#define IDR0_TTF_AARCH32_64 3
#define IDR0_S1P (1 << 1)
#define IDR0_S2P (1 << 0)
@@ -76,31 +73,24 @@
#define IDR1_TABLES_PRESET (1 << 30)
#define IDR1_QUEUES_PRESET (1 << 29)
#define IDR1_REL (1 << 28)
-#define IDR1_CMDQ_SHIFT 21
-#define IDR1_CMDQ_MASK 0x1f
-#define IDR1_EVTQ_SHIFT 16
-#define IDR1_EVTQ_MASK 0x1f
-#define IDR1_PRIQ_SHIFT 11
-#define IDR1_PRIQ_MASK 0x1f
-#define IDR1_SSID_SHIFT 6
-#define IDR1_SSID_MASK 0x1f
-#define IDR1_SID_SHIFT 0
-#define IDR1_SID_MASK 0x3f
+#define IDR1_CMDQS GENMASK(25, 21)
+#define IDR1_EVTQS GENMASK(20, 16)
+#define IDR1_PRIQS GENMASK(15, 11)
+#define IDR1_SSIDSIZE GENMASK(10, 6)
+#define IDR1_SIDSIZE GENMASK(5, 0)
#define ARM_SMMU_IDR5 0x14
-#define IDR5_STALL_MAX_SHIFT 16
-#define IDR5_STALL_MAX_MASK 0xffff
+#define IDR5_STALL_MAX GENMASK(31, 16)
#define IDR5_GRAN64K (1 << 6)
#define IDR5_GRAN16K (1 << 5)
#define IDR5_GRAN4K (1 << 4)
-#define IDR5_OAS_SHIFT 0
-#define IDR5_OAS_MASK 0x7
-#define IDR5_OAS_32_BIT (0 << IDR5_OAS_SHIFT)
-#define IDR5_OAS_36_BIT (1 << IDR5_OAS_SHIFT)
-#define IDR5_OAS_40_BIT (2 << IDR5_OAS_SHIFT)
-#define IDR5_OAS_42_BIT (3 << IDR5_OAS_SHIFT)
-#define IDR5_OAS_44_BIT (4 << IDR5_OAS_SHIFT)
-#define IDR5_OAS_48_BIT (5 << IDR5_OAS_SHIFT)
+#define IDR5_OAS GENMASK(2, 0)
+#define IDR5_OAS_32_BIT 0
+#define IDR5_OAS_36_BIT 1
+#define IDR5_OAS_40_BIT 2
+#define IDR5_OAS_42_BIT 3
+#define IDR5_OAS_44_BIT 4
+#define IDR5_OAS_48_BIT 5
#define ARM_SMMU_CR0 0x20
#define CR0_CMDQEN (1 << 3)
@@ -111,18 +101,16 @@
#define ARM_SMMU_CR0ACK 0x24
#define ARM_SMMU_CR1 0x28
-#define CR1_SH_NSH 0
-#define CR1_SH_OSH 2
-#define CR1_SH_ISH 3
+#define CR1_TABLE_SH GENMASK(11, 10)
+#define CR1_TABLE_OC GENMASK(9, 8)
+#define CR1_TABLE_IC GENMASK(7, 6)
+#define CR1_QUEUE_SH GENMASK(5, 4)
+#define CR1_QUEUE_OC GENMASK(3, 2)
+#define CR1_QUEUE_IC GENMASK(1, 0)
+/* CR1 cacheability fields don't quite follow the usual TCR-style encoding */
#define CR1_CACHE_NC 0
#define CR1_CACHE_WB 1
#define CR1_CACHE_WT 2
-#define CR1_TABLE_SH_SHIFT 10
-#define CR1_TABLE_OC_SHIFT 8
-#define CR1_TABLE_IC_SHIFT 6
-#define CR1_QUEUE_SH_SHIFT 4
-#define CR1_QUEUE_OC_SHIFT 2
-#define CR1_QUEUE_IC_SHIFT 0
#define ARM_SMMU_CR2 0x2c
#define CR2_PTM (1 << 2)
@@ -130,8 +118,8 @@
#define CR2_E2H (1 << 0)
#define ARM_SMMU_GBPA 0x44
-#define GBPA_ABORT (1 << 20)
#define GBPA_UPDATE (1 << 31)
+#define GBPA_ABORT (1 << 20)
#define ARM_SMMU_IRQ_CTRL 0x50
#define IRQ_CTRL_EVTQ_IRQEN (1 << 2)
@@ -162,14 +150,11 @@
#define STRTAB_BASE_ADDR_MASK GENMASK_ULL(47, 6)
#define ARM_SMMU_STRTAB_BASE_CFG 0x88
-#define STRTAB_BASE_CFG_LOG2SIZE_SHIFT 0
-#define STRTAB_BASE_CFG_LOG2SIZE_MASK 0x3f
-#define STRTAB_BASE_CFG_SPLIT_SHIFT 6
-#define STRTAB_BASE_CFG_SPLIT_MASK 0x1f
-#define STRTAB_BASE_CFG_FMT_SHIFT 16
-#define STRTAB_BASE_CFG_FMT_MASK 0x3
-#define STRTAB_BASE_CFG_FMT_LINEAR (0 << STRTAB_BASE_CFG_FMT_SHIFT)
-#define STRTAB_BASE_CFG_FMT_2LVL (1 << STRTAB_BASE_CFG_FMT_SHIFT)
+#define STRTAB_BASE_CFG_FMT GENMASK(17, 16)
+#define STRTAB_BASE_CFG_FMT_LINEAR 0
+#define STRTAB_BASE_CFG_FMT_2LVL 1
+#define STRTAB_BASE_CFG_SPLIT GENMASK(10, 6)
+#define STRTAB_BASE_CFG_LOG2SIZE GENMASK(5, 0)
#define ARM_SMMU_CMDQ_BASE 0x90
#define ARM_SMMU_CMDQ_PROD 0x98
@@ -191,12 +176,14 @@
/* Common MSI config fields */
#define MSI_CFG0_ADDR_MASK GENMASK_ULL(47, 2)
-#define MSI_CFG2_SH_SHIFT 4
-#define MSI_CFG2_SH_NSH (0UL << MSI_CFG2_SH_SHIFT)
-#define MSI_CFG2_SH_OSH (2UL << MSI_CFG2_SH_SHIFT)
-#define MSI_CFG2_SH_ISH (3UL << MSI_CFG2_SH_SHIFT)
-#define MSI_CFG2_MEMATTR_SHIFT 0
-#define MSI_CFG2_MEMATTR_DEVICE_nGnRE (0x1 << MSI_CFG2_MEMATTR_SHIFT)
+#define MSI_CFG2_SH GENMASK(5, 4)
+#define MSI_CFG2_MEMATTR GENMASK(3, 0)
+
+/* Common memory attribute values */
+#define ARM_SMMU_SH_NSH 0
+#define ARM_SMMU_SH_OSH 2
+#define ARM_SMMU_SH_ISH 3
+#define ARM_SMMU_MEMATTR_DEVICE_nGnRE 0x1
#define Q_IDX(q, p) ((p) & ((1 << (q)->max_n_shift) - 1))
#define Q_WRP(q, p) ((p) & (1 << (q)->max_n_shift))
@@ -207,8 +194,7 @@
#define Q_BASE_RWA (1UL << 62)
#define Q_BASE_ADDR_MASK GENMASK_ULL(47, 5)
-#define Q_BASE_LOG2SIZE_SHIFT 0
-#define Q_BASE_LOG2SIZE_MASK 0x1fUL
+#define Q_BASE_LOG2SIZE GENMASK(4, 0)
/*
* Stream table.
@@ -333,8 +319,7 @@
#define CMDQ_ENT_DWORDS 2
#define CMDQ_MAX_SZ_SHIFT 8
-#define CMDQ_ERR_SHIFT 24
-#define CMDQ_ERR_MASK 0x7f
+#define CMDQ_CONS_ERR GENMASK(30, 24)
#define CMDQ_ERR_CERROR_NONE_IDX 0
#define CMDQ_ERR_CERROR_ILL_IDX 1
#define CMDQ_ERR_CERROR_ABT_IDX 2
@@ -910,7 +895,7 @@ static void arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu)
u64 cmd[CMDQ_ENT_DWORDS];
struct arm_smmu_queue *q = &smmu->cmdq.q;
u32 cons = readl_relaxed(q->cons_reg);
- u32 idx = cons >> CMDQ_ERR_SHIFT & CMDQ_ERR_MASK;
+ u32 idx = FIELD_GET(CMDQ_CONS_ERR, cons);
struct arm_smmu_cmdq_ent cmd_sync = {
.opcode = CMDQ_OP_CMD_SYNC,
};
@@ -2093,8 +2078,7 @@ static int arm_smmu_init_one_queue(struct arm_smmu_device *smmu,
q->q_base = Q_BASE_RWA;
q->q_base |= q->base_dma & Q_BASE_ADDR_MASK;
- q->q_base |= (q->max_n_shift & Q_BASE_LOG2SIZE_MASK)
- << Q_BASE_LOG2SIZE_SHIFT;
+ q->q_base |= FIELD_PREP(Q_BASE_LOG2SIZE, q->max_n_shift);
q->prod = q->cons = 0;
return 0;
@@ -2176,11 +2160,9 @@ static int arm_smmu_init_strtab_2lvl(struct arm_smmu_device *smmu)
cfg->strtab = strtab;
/* Configure strtab_base_cfg for 2 levels */
- reg = STRTAB_BASE_CFG_FMT_2LVL;
- reg |= (size & STRTAB_BASE_CFG_LOG2SIZE_MASK)
- << STRTAB_BASE_CFG_LOG2SIZE_SHIFT;
- reg |= (STRTAB_SPLIT & STRTAB_BASE_CFG_SPLIT_MASK)
- << STRTAB_BASE_CFG_SPLIT_SHIFT;
+ reg = FIELD_PREP(STRTAB_BASE_CFG_FMT, STRTAB_BASE_CFG_FMT_2LVL);
+ reg |= FIELD_PREP(STRTAB_BASE_CFG_LOG2SIZE, size);
+ reg |= FIELD_PREP(STRTAB_BASE_CFG_SPLIT, STRTAB_SPLIT);
cfg->strtab_base_cfg = reg;
return arm_smmu_init_l1_strtab(smmu);
@@ -2206,9 +2188,8 @@ static int arm_smmu_init_strtab_linear(struct arm_smmu_device *smmu)
cfg->num_l1_ents = 1 << smmu->sid_bits;
/* Configure strtab_base_cfg for a linear table covering all SIDs */
- reg = STRTAB_BASE_CFG_FMT_LINEAR;
- reg |= (smmu->sid_bits & STRTAB_BASE_CFG_LOG2SIZE_MASK)
- << STRTAB_BASE_CFG_LOG2SIZE_SHIFT;
+ reg = FIELD_PREP(STRTAB_BASE_CFG_FMT, STRTAB_BASE_CFG_FMT_LINEAR);
+ reg |= FIELD_PREP(STRTAB_BASE_CFG_LOG2SIZE, smmu->sid_bits);
cfg->strtab_base_cfg = reg;
arm_smmu_init_bypass_stes(strtab, cfg->num_l1_ents);
@@ -2296,7 +2277,7 @@ static void arm_smmu_write_msi_msg(struct msi_desc *desc, struct msi_msg *msg)
writeq_relaxed(doorbell, smmu->base + cfg[0]);
writel_relaxed(msg->data, smmu->base + cfg[1]);
- writel_relaxed(MSI_CFG2_MEMATTR_DEVICE_nGnRE, smmu->base + cfg[2]);
+ writel_relaxed(ARM_SMMU_MEMATTR_DEVICE_nGnRE, smmu->base + cfg[2]);
}
static void arm_smmu_setup_msis(struct arm_smmu_device *smmu)
@@ -2452,12 +2433,12 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass)
return ret;
/* CR1 (table and queue memory attributes) */
- reg = (CR1_SH_ISH << CR1_TABLE_SH_SHIFT) |
- (CR1_CACHE_WB << CR1_TABLE_OC_SHIFT) |
- (CR1_CACHE_WB << CR1_TABLE_IC_SHIFT) |
- (CR1_SH_ISH << CR1_QUEUE_SH_SHIFT) |
- (CR1_CACHE_WB << CR1_QUEUE_OC_SHIFT) |
- (CR1_CACHE_WB << CR1_QUEUE_IC_SHIFT);
+ reg = FIELD_PREP(CR1_TABLE_SH, ARM_SMMU_SH_ISH) |
+ FIELD_PREP(CR1_TABLE_OC, CR1_CACHE_WB) |
+ FIELD_PREP(CR1_TABLE_IC, CR1_CACHE_WB) |
+ FIELD_PREP(CR1_QUEUE_SH, ARM_SMMU_SH_ISH) |
+ FIELD_PREP(CR1_QUEUE_OC, CR1_CACHE_WB) |
+ FIELD_PREP(CR1_QUEUE_IC, CR1_CACHE_WB);
writel_relaxed(reg, smmu->base + ARM_SMMU_CR1);
/* CR2 (random crap) */
@@ -2567,7 +2548,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
reg = readl_relaxed(smmu->base + ARM_SMMU_IDR0);
/* 2-level structures */
- if ((reg & IDR0_ST_LVL_MASK << IDR0_ST_LVL_SHIFT) == IDR0_ST_LVL_2LVL)
+ if (FIELD_GET(IDR0_ST_LVL, reg) == IDR0_ST_LVL_2LVL)
smmu->features |= ARM_SMMU_FEAT_2_LVL_STRTAB;
if (reg & IDR0_CD2L)
@@ -2578,7 +2559,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
* We currently require the same endianness as the CPU, but this
* could be changed later by adding a new IO_PGTABLE_QUIRK.
*/
- switch (reg & IDR0_TTENDIAN_MASK << IDR0_TTENDIAN_SHIFT) {
+ switch (FIELD_GET(IDR0_TTENDIAN, reg)) {
case IDR0_TTENDIAN_MIXED:
smmu->features |= ARM_SMMU_FEAT_TT_LE | ARM_SMMU_FEAT_TT_BE;
break;
@@ -2620,7 +2601,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
dev_warn(smmu->dev, "IDR0.COHACC overridden by FW configuration (%s)\n",
coherent ? "true" : "false");
- switch (reg & IDR0_STALL_MODEL_MASK << IDR0_STALL_MODEL_SHIFT) {
+ switch (FIELD_GET(IDR0_STALL_MODEL, reg)) {
case IDR0_STALL_MODEL_FORCE:
smmu->features |= ARM_SMMU_FEAT_STALL_FORCE;
/* Fallthrough */
@@ -2640,7 +2621,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
}
/* We only support the AArch64 table format at present */
- switch (reg & IDR0_TTF_MASK << IDR0_TTF_SHIFT) {
+ switch (FIELD_GET(IDR0_TTF, reg)) {
case IDR0_TTF_AARCH32_64:
smmu->ias = 40;
/* Fallthrough */
@@ -2663,22 +2644,22 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
}
/* Queue sizes, capped at 4k */
- smmu->cmdq.q.max_n_shift = min((u32)CMDQ_MAX_SZ_SHIFT,
- reg >> IDR1_CMDQ_SHIFT & IDR1_CMDQ_MASK);
+ smmu->cmdq.q.max_n_shift = min_t(u32, CMDQ_MAX_SZ_SHIFT,
+ FIELD_GET(IDR1_CMDQS, reg));
if (!smmu->cmdq.q.max_n_shift) {
/* Odd alignment restrictions on the base, so ignore for now */
dev_err(smmu->dev, "unit-length command queue not supported\n");
return -ENXIO;
}
- smmu->evtq.q.max_n_shift = min((u32)EVTQ_MAX_SZ_SHIFT,
- reg >> IDR1_EVTQ_SHIFT & IDR1_EVTQ_MASK);
- smmu->priq.q.max_n_shift = min((u32)PRIQ_MAX_SZ_SHIFT,
- reg >> IDR1_PRIQ_SHIFT & IDR1_PRIQ_MASK);
+ smmu->evtq.q.max_n_shift = min_t(u32, EVTQ_MAX_SZ_SHIFT,
+ FIELD_GET(IDR1_EVTQS, reg));
+ smmu->priq.q.max_n_shift = min_t(u32, PRIQ_MAX_SZ_SHIFT,
+ FIELD_GET(IDR1_PRIQS, reg));
/* SID/SSID sizes */
- smmu->ssid_bits = reg >> IDR1_SSID_SHIFT & IDR1_SSID_MASK;
- smmu->sid_bits = reg >> IDR1_SID_SHIFT & IDR1_SID_MASK;
+ smmu->ssid_bits = FIELD_GET(IDR1_SSIDSIZE, reg);
+ smmu->sid_bits = FIELD_GET(IDR1_SIDSIZE, reg);
/*
* If the SMMU supports fewer bits than would fill a single L2 stream
@@ -2691,8 +2672,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
reg = readl_relaxed(smmu->base + ARM_SMMU_IDR5);
/* Maximum number of outstanding stalls */
- smmu->evtq.max_stalls = reg >> IDR5_STALL_MAX_SHIFT
- & IDR5_STALL_MAX_MASK;
+ smmu->evtq.max_stalls = FIELD_GET(IDR5_STALL_MAX, reg);
/* Page sizes */
if (reg & IDR5_GRAN64K)
@@ -2708,7 +2688,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
arm_smmu_ops.pgsize_bitmap |= smmu->pgsize_bitmap;
/* Output address size */
- switch (reg & IDR5_OAS_MASK << IDR5_OAS_SHIFT) {
+ switch (FIELD_GET(IDR5_OAS, reg)) {
case IDR5_OAS_32_BIT:
smmu->oas = 32;
break;
--
2.16.1.dirty
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 3/7] iommu/arm-smmu-v3: Clean up table definitions
[not found] ` <cover.1522065583.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2018-03-26 12:35 ` [PATCH v3 1/7] iommu/arm-smmu-v3: Clean up address masking Robin Murphy
2018-03-26 12:35 ` [PATCH v3 2/7] iommu/arm-smmu-v3: Clean up register definitions Robin Murphy
@ 2018-03-26 12:35 ` Robin Murphy
2018-03-26 12:35 ` [PATCH v3 4/7] iommu/arm-smmu-v3: Clean up queue definitions Robin Murphy
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2018-03-26 12:35 UTC (permalink / raw)
To: will.deacon-5wv7dgnIgG8, joro-zLv9SwRftAIdnm+yROfE0A
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
As with registers, use GENMASK and the bitfield accessors consistently
for table fields, to save some lines and ease maintenance a little. This
also catches a subtle off-by-one wherein bit 5 of CD.T0SZ was missing.
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
v3: New
drivers/iommu/arm-smmu-v3.c | 147 +++++++++++++++++---------------------------
1 file changed, 58 insertions(+), 89 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 40a19ce03f99..b1dc7d7cbbb5 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -207,54 +207,46 @@
#define STRTAB_SPLIT 8
#define STRTAB_L1_DESC_DWORDS 1
-#define STRTAB_L1_DESC_SPAN_SHIFT 0
-#define STRTAB_L1_DESC_SPAN_MASK 0x1fUL
+#define STRTAB_L1_DESC_SPAN GENMASK_ULL(4, 0)
#define STRTAB_L1_DESC_L2PTR_MASK GENMASK_ULL(47, 6)
#define STRTAB_STE_DWORDS 8
#define STRTAB_STE_0_V (1UL << 0)
-#define STRTAB_STE_0_CFG_SHIFT 1
-#define STRTAB_STE_0_CFG_MASK 0x7UL
-#define STRTAB_STE_0_CFG_ABORT (0UL << STRTAB_STE_0_CFG_SHIFT)
-#define STRTAB_STE_0_CFG_BYPASS (4UL << STRTAB_STE_0_CFG_SHIFT)
-#define STRTAB_STE_0_CFG_S1_TRANS (5UL << STRTAB_STE_0_CFG_SHIFT)
-#define STRTAB_STE_0_CFG_S2_TRANS (6UL << STRTAB_STE_0_CFG_SHIFT)
+#define STRTAB_STE_0_CFG GENMASK_ULL(3, 1)
+#define STRTAB_STE_0_CFG_ABORT 0
+#define STRTAB_STE_0_CFG_BYPASS 4
+#define STRTAB_STE_0_CFG_S1_TRANS 5
+#define STRTAB_STE_0_CFG_S2_TRANS 6
-#define STRTAB_STE_0_S1FMT_SHIFT 4
-#define STRTAB_STE_0_S1FMT_LINEAR (0UL << STRTAB_STE_0_S1FMT_SHIFT)
+#define STRTAB_STE_0_S1FMT GENMASK_ULL(5, 4)
+#define STRTAB_STE_0_S1FMT_LINEAR 0
#define STRTAB_STE_0_S1CTXPTR_MASK GENMASK_ULL(47, 6)
-#define STRTAB_STE_0_S1CDMAX_SHIFT 59
-#define STRTAB_STE_0_S1CDMAX_MASK 0x1fUL
+#define STRTAB_STE_0_S1CDMAX GENMASK_ULL(63, 59)
#define STRTAB_STE_1_S1C_CACHE_NC 0UL
#define STRTAB_STE_1_S1C_CACHE_WBRA 1UL
#define STRTAB_STE_1_S1C_CACHE_WT 2UL
#define STRTAB_STE_1_S1C_CACHE_WB 3UL
-#define STRTAB_STE_1_S1C_SH_NSH 0UL
-#define STRTAB_STE_1_S1C_SH_OSH 2UL
-#define STRTAB_STE_1_S1C_SH_ISH 3UL
-#define STRTAB_STE_1_S1CIR_SHIFT 2
-#define STRTAB_STE_1_S1COR_SHIFT 4
-#define STRTAB_STE_1_S1CSH_SHIFT 6
+#define STRTAB_STE_1_S1CIR GENMASK_ULL(3, 2)
+#define STRTAB_STE_1_S1COR GENMASK_ULL(5, 4)
+#define STRTAB_STE_1_S1CSH GENMASK_ULL(7, 6)
#define STRTAB_STE_1_S1STALLD (1UL << 27)
+#define STRTAB_STE_1_EATS GENMASK_ULL(29, 28)
#define STRTAB_STE_1_EATS_ABT 0UL
#define STRTAB_STE_1_EATS_TRANS 1UL
#define STRTAB_STE_1_EATS_S1CHK 2UL
-#define STRTAB_STE_1_EATS_SHIFT 28
+#define STRTAB_STE_1_STRW GENMASK_ULL(31, 30)
#define STRTAB_STE_1_STRW_NSEL1 0UL
#define STRTAB_STE_1_STRW_EL2 2UL
-#define STRTAB_STE_1_STRW_SHIFT 30
+#define STRTAB_STE_1_SHCFG GENMASK_ULL(45, 44)
#define STRTAB_STE_1_SHCFG_INCOMING 1UL
-#define STRTAB_STE_1_SHCFG_SHIFT 44
-#define STRTAB_STE_2_S2VMID_SHIFT 0
-#define STRTAB_STE_2_S2VMID_MASK 0xffffUL
-#define STRTAB_STE_2_VTCR_SHIFT 32
-#define STRTAB_STE_2_VTCR_MASK 0x7ffffUL
+#define STRTAB_STE_2_S2VMID GENMASK_ULL(15, 0)
+#define STRTAB_STE_2_VTCR GENMASK_ULL(50, 32)
#define STRTAB_STE_2_S2AA64 (1UL << 51)
#define STRTAB_STE_2_S2ENDI (1UL << 52)
#define STRTAB_STE_2_S2PTW (1UL << 54)
@@ -264,56 +256,41 @@
/* Context descriptor (stage-1 only) */
#define CTXDESC_CD_DWORDS 8
-#define CTXDESC_CD_0_TCR_T0SZ_SHIFT 0
-#define ARM64_TCR_T0SZ_SHIFT 0
-#define ARM64_TCR_T0SZ_MASK 0x1fUL
-#define CTXDESC_CD_0_TCR_TG0_SHIFT 6
-#define ARM64_TCR_TG0_SHIFT 14
-#define ARM64_TCR_TG0_MASK 0x3UL
-#define CTXDESC_CD_0_TCR_IRGN0_SHIFT 8
-#define ARM64_TCR_IRGN0_SHIFT 8
-#define ARM64_TCR_IRGN0_MASK 0x3UL
-#define CTXDESC_CD_0_TCR_ORGN0_SHIFT 10
-#define ARM64_TCR_ORGN0_SHIFT 10
-#define ARM64_TCR_ORGN0_MASK 0x3UL
-#define CTXDESC_CD_0_TCR_SH0_SHIFT 12
-#define ARM64_TCR_SH0_SHIFT 12
-#define ARM64_TCR_SH0_MASK 0x3UL
-#define CTXDESC_CD_0_TCR_EPD0_SHIFT 14
-#define ARM64_TCR_EPD0_SHIFT 7
-#define ARM64_TCR_EPD0_MASK 0x1UL
-#define CTXDESC_CD_0_TCR_EPD1_SHIFT 30
-#define ARM64_TCR_EPD1_SHIFT 23
-#define ARM64_TCR_EPD1_MASK 0x1UL
+#define CTXDESC_CD_0_TCR_T0SZ GENMASK_ULL(5, 0)
+#define ARM64_TCR_T0SZ GENMASK_ULL(5, 0)
+#define CTXDESC_CD_0_TCR_TG0 GENMASK_ULL(7, 6)
+#define ARM64_TCR_TG0 GENMASK_ULL(15, 14)
+#define CTXDESC_CD_0_TCR_IRGN0 GENMASK_ULL(9, 8)
+#define ARM64_TCR_IRGN0 GENMASK_ULL(9, 8)
+#define CTXDESC_CD_0_TCR_ORGN0 GENMASK_ULL(11, 10)
+#define ARM64_TCR_ORGN0 GENMASK_ULL(11, 10)
+#define CTXDESC_CD_0_TCR_SH0 GENMASK_ULL(13, 12)
+#define ARM64_TCR_SH0 GENMASK_ULL(13, 12)
+#define CTXDESC_CD_0_TCR_EPD0 (1ULL << 14)
+#define ARM64_TCR_EPD0 (1ULL << 7)
+#define CTXDESC_CD_0_TCR_EPD1 (1ULL << 30)
+#define ARM64_TCR_EPD1 (1ULL << 23)
#define CTXDESC_CD_0_ENDI (1UL << 15)
#define CTXDESC_CD_0_V (1UL << 31)
-#define CTXDESC_CD_0_TCR_IPS_SHIFT 32
-#define ARM64_TCR_IPS_SHIFT 32
-#define ARM64_TCR_IPS_MASK 0x7UL
-#define CTXDESC_CD_0_TCR_TBI0_SHIFT 38
-#define ARM64_TCR_TBI0_SHIFT 37
-#define ARM64_TCR_TBI0_MASK 0x1UL
+#define CTXDESC_CD_0_TCR_IPS GENMASK_ULL(34, 32)
+#define ARM64_TCR_IPS GENMASK_ULL(34, 32)
+#define CTXDESC_CD_0_TCR_TBI0 (1ULL << 38)
+#define ARM64_TCR_TBI0 (1ULL << 37)
#define CTXDESC_CD_0_AA64 (1UL << 41)
#define CTXDESC_CD_0_S (1UL << 44)
#define CTXDESC_CD_0_R (1UL << 45)
#define CTXDESC_CD_0_A (1UL << 46)
-#define CTXDESC_CD_0_ASET_SHIFT 47
-#define CTXDESC_CD_0_ASET_SHARED (0UL << CTXDESC_CD_0_ASET_SHIFT)
-#define CTXDESC_CD_0_ASET_PRIVATE (1UL << CTXDESC_CD_0_ASET_SHIFT)
-#define CTXDESC_CD_0_ASID_SHIFT 48
-#define CTXDESC_CD_0_ASID_MASK 0xffffUL
+#define CTXDESC_CD_0_ASET (1UL << 47)
+#define CTXDESC_CD_0_ASID GENMASK_ULL(63, 48)
#define CTXDESC_CD_1_TTB0_MASK GENMASK_ULL(47, 4)
-#define CTXDESC_CD_3_MAIR_SHIFT 0
-
/* Convert between AArch64 (CPU) TCR format and SMMU CD format */
-#define ARM_SMMU_TCR2CD(tcr, fld) \
- (((tcr) >> ARM64_TCR_##fld##_SHIFT & ARM64_TCR_##fld##_MASK) \
- << CTXDESC_CD_0_TCR_##fld##_SHIFT)
+#define ARM_SMMU_TCR2CD(tcr, fld) FIELD_PREP(CTXDESC_CD_0_TCR_##fld, \
+ FIELD_GET(ARM64_TCR_##fld, tcr))
/* Command queue */
#define CMDQ_ENT_DWORDS 2
@@ -1060,8 +1037,8 @@ static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu,
#ifdef __BIG_ENDIAN
CTXDESC_CD_0_ENDI |
#endif
- CTXDESC_CD_0_R | CTXDESC_CD_0_A | CTXDESC_CD_0_ASET_PRIVATE |
- CTXDESC_CD_0_AA64 | (u64)cfg->cd.asid << CTXDESC_CD_0_ASID_SHIFT |
+ CTXDESC_CD_0_R | CTXDESC_CD_0_A | CTXDESC_CD_0_ASET |
+ CTXDESC_CD_0_AA64 | FIELD_PREP(CTXDESC_CD_0_ASID, cfg->cd.asid) |
CTXDESC_CD_0_V;
/* STALL_MODEL==0b10 && CD.S==0 is ILLEGAL */
@@ -1073,7 +1050,7 @@ static void arm_smmu_write_ctx_desc(struct arm_smmu_device *smmu,
val = cfg->cd.ttbr & CTXDESC_CD_1_TTB0_MASK;
cfg->cdptr[1] = cpu_to_le64(val);
- cfg->cdptr[3] = cpu_to_le64(cfg->cd.mair << CTXDESC_CD_3_MAIR_SHIFT);
+ cfg->cdptr[3] = cpu_to_le64(cfg->cd.mair);
}
/* Stream table manipulation functions */
@@ -1082,8 +1059,7 @@ arm_smmu_write_strtab_l1_desc(__le64 *dst, struct arm_smmu_strtab_l1_desc *desc)
{
u64 val = 0;
- val |= (desc->span & STRTAB_L1_DESC_SPAN_MASK)
- << STRTAB_L1_DESC_SPAN_SHIFT;
+ val |= FIELD_PREP(STRTAB_L1_DESC_SPAN, desc->span);
val |= desc->l2ptr_dma & STRTAB_L1_DESC_L2PTR_MASK;
*dst = cpu_to_le64(val);
@@ -1132,10 +1108,7 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_device *smmu, u32 sid,
};
if (val & STRTAB_STE_0_V) {
- u64 cfg;
-
- cfg = val & STRTAB_STE_0_CFG_MASK << STRTAB_STE_0_CFG_SHIFT;
- switch (cfg) {
+ switch (FIELD_GET(STRTAB_STE_0_CFG, val)) {
case STRTAB_STE_0_CFG_BYPASS:
break;
case STRTAB_STE_0_CFG_S1_TRANS:
@@ -1156,13 +1129,13 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_device *smmu, u32 sid,
/* Bypass/fault */
if (!ste->assigned || !(ste->s1_cfg || ste->s2_cfg)) {
if (!ste->assigned && disable_bypass)
- val |= STRTAB_STE_0_CFG_ABORT;
+ val |= FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_ABORT);
else
- val |= STRTAB_STE_0_CFG_BYPASS;
+ val |= FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_BYPASS);
dst[0] = cpu_to_le64(val);
- dst[1] = cpu_to_le64(STRTAB_STE_1_SHCFG_INCOMING
- << STRTAB_STE_1_SHCFG_SHIFT);
+ dst[1] = cpu_to_le64(FIELD_PREP(STRTAB_STE_1_SHCFG,
+ STRTAB_STE_1_SHCFG_INCOMING));
dst[2] = 0; /* Nuke the VMID */
/*
* The SMMU can perform negative caching, so we must sync
@@ -1176,40 +1149,36 @@ static void arm_smmu_write_strtab_ent(struct arm_smmu_device *smmu, u32 sid,
if (ste->s1_cfg) {
BUG_ON(ste_live);
dst[1] = cpu_to_le64(
- STRTAB_STE_1_S1C_CACHE_WBRA
- << STRTAB_STE_1_S1CIR_SHIFT |
- STRTAB_STE_1_S1C_CACHE_WBRA
- << STRTAB_STE_1_S1COR_SHIFT |
- STRTAB_STE_1_S1C_SH_ISH << STRTAB_STE_1_S1CSH_SHIFT |
+ FIELD_PREP(STRTAB_STE_1_S1CIR, STRTAB_STE_1_S1C_CACHE_WBRA) |
+ FIELD_PREP(STRTAB_STE_1_S1COR, STRTAB_STE_1_S1C_CACHE_WBRA) |
+ FIELD_PREP(STRTAB_STE_1_S1CSH, ARM_SMMU_SH_ISH) |
#ifdef CONFIG_PCI_ATS
- STRTAB_STE_1_EATS_TRANS << STRTAB_STE_1_EATS_SHIFT |
+ FIELD_PREP(STRTAB_STE_1_EATS, STRTAB_STE_1_EATS_TRANS) |
#endif
- STRTAB_STE_1_STRW_NSEL1 << STRTAB_STE_1_STRW_SHIFT);
+ FIELD_PREP(STRTAB_STE_1_STRW, STRTAB_STE_1_STRW_NSEL1));
if (smmu->features & ARM_SMMU_FEAT_STALLS &&
!(smmu->features & ARM_SMMU_FEAT_STALL_FORCE))
dst[1] |= cpu_to_le64(STRTAB_STE_1_S1STALLD);
val |= (ste->s1_cfg->cdptr_dma & STRTAB_STE_0_S1CTXPTR_MASK) |
- STRTAB_STE_0_CFG_S1_TRANS;
+ FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_S1_TRANS);
}
if (ste->s2_cfg) {
BUG_ON(ste_live);
dst[2] = cpu_to_le64(
- ste->s2_cfg->vmid << STRTAB_STE_2_S2VMID_SHIFT |
- (ste->s2_cfg->vtcr & STRTAB_STE_2_VTCR_MASK)
- << STRTAB_STE_2_VTCR_SHIFT |
+ FIELD_PREP(STRTAB_STE_2_S2VMID, ste->s2_cfg->vmid) |
+ FIELD_PREP(STRTAB_STE_2_VTCR, ste->s2_cfg->vtcr) |
#ifdef __BIG_ENDIAN
STRTAB_STE_2_S2ENDI |
#endif
STRTAB_STE_2_S2PTW | STRTAB_STE_2_S2AA64 |
STRTAB_STE_2_S2R);
- dst[3] = cpu_to_le64(ste->s2_cfg->vttbr &
- STRTAB_STE_3_S2TTB_MASK);
+ dst[3] = cpu_to_le64(ste->s2_cfg->vttbr & STRTAB_STE_3_S2TTB_MASK);
- val |= STRTAB_STE_0_CFG_S2_TRANS;
+ val |= FIELD_PREP(STRTAB_STE_0_CFG, STRTAB_STE_0_CFG_S2_TRANS);
}
arm_smmu_sync_ste_for_sid(smmu, sid);
--
2.16.1.dirty
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 4/7] iommu/arm-smmu-v3: Clean up queue definitions
[not found] ` <cover.1522065583.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
` (2 preceding siblings ...)
2018-03-26 12:35 ` [PATCH v3 3/7] iommu/arm-smmu-v3: Clean up table definitions Robin Murphy
@ 2018-03-26 12:35 ` Robin Murphy
2018-03-26 12:35 ` [PATCH v3 5/7] iommu/io-pgtable-arm: Support 52-bit physical address Robin Murphy
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2018-03-26 12:35 UTC (permalink / raw)
To: will.deacon-5wv7dgnIgG8, joro-zLv9SwRftAIdnm+yROfE0A
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
As with registers and tables, use GENMASK and the bitfield accessors
consistently for queue fields, to save some lines and ease maintenance
a little. This now leaves everything in a nice state where all named
field definitions expect to be used with bitfield accessors (although
since single-bit fields can still be used directly we leave some of
those uses as-is to avoid unnecessary churn), while the few remaining
*_MASK definitions apply exclusively to in-place values.
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
v3: New
drivers/iommu/arm-smmu-v3.c | 126 +++++++++++++++++++-------------------------
1 file changed, 54 insertions(+), 72 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index b1dc7d7cbbb5..4e0ffda217f6 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -184,6 +184,7 @@
#define ARM_SMMU_SH_OSH 2
#define ARM_SMMU_SH_ISH 3
#define ARM_SMMU_MEMATTR_DEVICE_nGnRE 0x1
+#define ARM_SMMU_MEMATTR_OIWB 0xf
#define Q_IDX(q, p) ((p) & ((1 << (q)->max_n_shift) - 1))
#define Q_WRP(q, p) ((p) & (1 << (q)->max_n_shift))
@@ -301,64 +302,49 @@
#define CMDQ_ERR_CERROR_ILL_IDX 1
#define CMDQ_ERR_CERROR_ABT_IDX 2
-#define CMDQ_0_OP_SHIFT 0
-#define CMDQ_0_OP_MASK 0xffUL
+#define CMDQ_0_OP GENMASK_ULL(7, 0)
#define CMDQ_0_SSV (1UL << 11)
-#define CMDQ_PREFETCH_0_SID_SHIFT 32
-#define CMDQ_PREFETCH_1_SIZE_SHIFT 0
+#define CMDQ_PREFETCH_0_SID GENMASK_ULL(63, 32)
+#define CMDQ_PREFETCH_1_SIZE GENMASK_ULL(4, 0)
#define CMDQ_PREFETCH_1_ADDR_MASK GENMASK_ULL(63, 12)
-#define CMDQ_CFGI_0_SID_SHIFT 32
-#define CMDQ_CFGI_0_SID_MASK 0xffffffffUL
+#define CMDQ_CFGI_0_SID GENMASK_ULL(63, 32)
#define CMDQ_CFGI_1_LEAF (1UL << 0)
-#define CMDQ_CFGI_1_RANGE_SHIFT 0
-#define CMDQ_CFGI_1_RANGE_MASK 0x1fUL
+#define CMDQ_CFGI_1_RANGE GENMASK_ULL(4, 0)
-#define CMDQ_TLBI_0_VMID_SHIFT 32
-#define CMDQ_TLBI_0_ASID_SHIFT 48
+#define CMDQ_TLBI_0_VMID GENMASK_ULL(47, 32)
+#define CMDQ_TLBI_0_ASID GENMASK_ULL(63, 48)
#define CMDQ_TLBI_1_LEAF (1UL << 0)
#define CMDQ_TLBI_1_VA_MASK GENMASK_ULL(63, 12)
#define CMDQ_TLBI_1_IPA_MASK GENMASK_ULL(47, 12)
-#define CMDQ_PRI_0_SSID_SHIFT 12
-#define CMDQ_PRI_0_SSID_MASK 0xfffffUL
-#define CMDQ_PRI_0_SID_SHIFT 32
-#define CMDQ_PRI_0_SID_MASK 0xffffffffUL
-#define CMDQ_PRI_1_GRPID_SHIFT 0
-#define CMDQ_PRI_1_GRPID_MASK 0x1ffUL
-#define CMDQ_PRI_1_RESP_SHIFT 12
-#define CMDQ_PRI_1_RESP_DENY (0UL << CMDQ_PRI_1_RESP_SHIFT)
-#define CMDQ_PRI_1_RESP_FAIL (1UL << CMDQ_PRI_1_RESP_SHIFT)
-#define CMDQ_PRI_1_RESP_SUCC (2UL << CMDQ_PRI_1_RESP_SHIFT)
+#define CMDQ_PRI_0_SSID GENMASK_ULL(31, 12)
+#define CMDQ_PRI_0_SID GENMASK_ULL(63, 32)
+#define CMDQ_PRI_1_GRPID GENMASK_ULL(8, 0)
+#define CMDQ_PRI_1_RESP GENMASK_ULL(13, 12)
-#define CMDQ_SYNC_0_CS_SHIFT 12
-#define CMDQ_SYNC_0_CS_NONE (0UL << CMDQ_SYNC_0_CS_SHIFT)
-#define CMDQ_SYNC_0_CS_IRQ (1UL << CMDQ_SYNC_0_CS_SHIFT)
-#define CMDQ_SYNC_0_CS_SEV (2UL << CMDQ_SYNC_0_CS_SHIFT)
-#define CMDQ_SYNC_0_MSH_SHIFT 22
-#define CMDQ_SYNC_0_MSH_ISH (3UL << CMDQ_SYNC_0_MSH_SHIFT)
-#define CMDQ_SYNC_0_MSIATTR_SHIFT 24
-#define CMDQ_SYNC_0_MSIATTR_OIWB (0xfUL << CMDQ_SYNC_0_MSIATTR_SHIFT)
-#define CMDQ_SYNC_0_MSIDATA_SHIFT 32
-#define CMDQ_SYNC_0_MSIDATA_MASK 0xffffffffUL
+#define CMDQ_SYNC_0_CS GENMASK_ULL(13, 12)
+#define CMDQ_SYNC_0_CS_NONE 0
+#define CMDQ_SYNC_0_CS_IRQ 1
+#define CMDQ_SYNC_0_CS_SEV 2
+#define CMDQ_SYNC_0_MSH GENMASK_ULL(23, 22)
+#define CMDQ_SYNC_0_MSIATTR GENMASK_ULL(27, 24)
+#define CMDQ_SYNC_0_MSIDATA GENMASK_ULL(63, 32)
#define CMDQ_SYNC_1_MSIADDR_MASK GENMASK_ULL(47, 2)
/* Event queue */
#define EVTQ_ENT_DWORDS 4
#define EVTQ_MAX_SZ_SHIFT 7
-#define EVTQ_0_ID_SHIFT 0
-#define EVTQ_0_ID_MASK 0xffUL
+#define EVTQ_0_ID GENMASK_ULL(7, 0)
/* PRI queue */
#define PRIQ_ENT_DWORDS 2
#define PRIQ_MAX_SZ_SHIFT 8
-#define PRIQ_0_SID_SHIFT 0
-#define PRIQ_0_SID_MASK 0xffffffffUL
-#define PRIQ_0_SSID_SHIFT 32
-#define PRIQ_0_SSID_MASK 0xfffffUL
+#define PRIQ_0_SID GENMASK_ULL(31, 0)
+#define PRIQ_0_SSID GENMASK_ULL(51, 32)
#define PRIQ_0_PERM_PRIV (1UL << 58)
#define PRIQ_0_PERM_EXEC (1UL << 59)
#define PRIQ_0_PERM_READ (1UL << 60)
@@ -366,8 +352,7 @@
#define PRIQ_0_PRG_LAST (1UL << 62)
#define PRIQ_0_SSID_V (1UL << 63)
-#define PRIQ_1_PRG_IDX_SHIFT 0
-#define PRIQ_1_PRG_IDX_MASK 0x1ffUL
+#define PRIQ_1_PRG_IDX GENMASK_ULL(8, 0)
#define PRIQ_1_ADDR_MASK GENMASK_ULL(63, 12)
/* High-level queue structures */
@@ -384,9 +369,9 @@ 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 pri_resp {
- PRI_RESP_DENY,
- PRI_RESP_FAIL,
- PRI_RESP_SUCC,
+ PRI_RESP_DENY = 0,
+ PRI_RESP_FAIL = 1,
+ PRI_RESP_SUCC = 2,
};
enum arm_smmu_msi_index {
@@ -790,67 +775,64 @@ static int queue_remove_raw(struct arm_smmu_queue *q, u64 *ent)
static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent)
{
memset(cmd, 0, CMDQ_ENT_DWORDS << 3);
- cmd[0] |= (ent->opcode & CMDQ_0_OP_MASK) << CMDQ_0_OP_SHIFT;
+ cmd[0] |= FIELD_PREP(CMDQ_0_OP, ent->opcode);
switch (ent->opcode) {
case CMDQ_OP_TLBI_EL2_ALL:
case CMDQ_OP_TLBI_NSNH_ALL:
break;
case CMDQ_OP_PREFETCH_CFG:
- cmd[0] |= (u64)ent->prefetch.sid << CMDQ_PREFETCH_0_SID_SHIFT;
- cmd[1] |= ent->prefetch.size << CMDQ_PREFETCH_1_SIZE_SHIFT;
+ cmd[0] |= FIELD_PREP(CMDQ_PREFETCH_0_SID, ent->prefetch.sid);
+ cmd[1] |= FIELD_PREP(CMDQ_PREFETCH_1_SIZE, ent->prefetch.size);
cmd[1] |= ent->prefetch.addr & CMDQ_PREFETCH_1_ADDR_MASK;
break;
case CMDQ_OP_CFGI_STE:
- cmd[0] |= (u64)ent->cfgi.sid << CMDQ_CFGI_0_SID_SHIFT;
- cmd[1] |= ent->cfgi.leaf ? CMDQ_CFGI_1_LEAF : 0;
+ cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SID, ent->cfgi.sid);
+ cmd[1] |= FIELD_PREP(CMDQ_CFGI_1_LEAF, ent->cfgi.leaf);
break;
case CMDQ_OP_CFGI_ALL:
/* Cover the entire SID range */
- cmd[1] |= CMDQ_CFGI_1_RANGE_MASK << CMDQ_CFGI_1_RANGE_SHIFT;
+ cmd[1] |= FIELD_PREP(CMDQ_CFGI_1_RANGE, 31);
break;
case CMDQ_OP_TLBI_NH_VA:
- cmd[0] |= (u64)ent->tlbi.asid << CMDQ_TLBI_0_ASID_SHIFT;
- cmd[1] |= ent->tlbi.leaf ? CMDQ_TLBI_1_LEAF : 0;
+ cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_ASID, ent->tlbi.asid);
+ cmd[1] |= FIELD_PREP(CMDQ_TLBI_1_LEAF, ent->tlbi.leaf);
cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_VA_MASK;
break;
case CMDQ_OP_TLBI_S2_IPA:
- cmd[0] |= (u64)ent->tlbi.vmid << CMDQ_TLBI_0_VMID_SHIFT;
- cmd[1] |= ent->tlbi.leaf ? CMDQ_TLBI_1_LEAF : 0;
+ cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_VMID, ent->tlbi.vmid);
+ cmd[1] |= FIELD_PREP(CMDQ_TLBI_1_LEAF, ent->tlbi.leaf);
cmd[1] |= ent->tlbi.addr & CMDQ_TLBI_1_IPA_MASK;
break;
case CMDQ_OP_TLBI_NH_ASID:
- cmd[0] |= (u64)ent->tlbi.asid << CMDQ_TLBI_0_ASID_SHIFT;
+ cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_ASID, ent->tlbi.asid);
/* Fallthrough */
case CMDQ_OP_TLBI_S12_VMALL:
- cmd[0] |= (u64)ent->tlbi.vmid << CMDQ_TLBI_0_VMID_SHIFT;
+ cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_VMID, ent->tlbi.vmid);
break;
case CMDQ_OP_PRI_RESP:
- cmd[0] |= ent->substream_valid ? CMDQ_0_SSV : 0;
- cmd[0] |= ent->pri.ssid << CMDQ_PRI_0_SSID_SHIFT;
- cmd[0] |= (u64)ent->pri.sid << CMDQ_PRI_0_SID_SHIFT;
- cmd[1] |= ent->pri.grpid << CMDQ_PRI_1_GRPID_SHIFT;
+ cmd[0] |= FIELD_PREP(CMDQ_0_SSV, ent->substream_valid);
+ cmd[0] |= FIELD_PREP(CMDQ_PRI_0_SSID, ent->pri.ssid);
+ cmd[0] |= FIELD_PREP(CMDQ_PRI_0_SID, ent->pri.sid);
+ cmd[1] |= FIELD_PREP(CMDQ_PRI_1_GRPID, ent->pri.grpid);
switch (ent->pri.resp) {
case PRI_RESP_DENY:
- cmd[1] |= CMDQ_PRI_1_RESP_DENY;
- break;
case PRI_RESP_FAIL:
- cmd[1] |= CMDQ_PRI_1_RESP_FAIL;
- break;
case PRI_RESP_SUCC:
- cmd[1] |= CMDQ_PRI_1_RESP_SUCC;
break;
default:
return -EINVAL;
}
+ cmd[1] |= FIELD_PREP(CMDQ_PRI_1_RESP, ent->pri.resp);
break;
case CMDQ_OP_CMD_SYNC:
if (ent->sync.msiaddr)
- cmd[0] |= CMDQ_SYNC_0_CS_IRQ;
+ cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_CS, CMDQ_SYNC_0_CS_IRQ);
else
- cmd[0] |= CMDQ_SYNC_0_CS_SEV;
- cmd[0] |= CMDQ_SYNC_0_MSH_ISH | CMDQ_SYNC_0_MSIATTR_OIWB;
- cmd[0] |= (u64)ent->sync.msidata << CMDQ_SYNC_0_MSIDATA_SHIFT;
+ cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_CS, CMDQ_SYNC_0_CS_SEV);
+ cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSH, ARM_SMMU_SH_ISH);
+ cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIATTR, ARM_SMMU_MEMATTR_OIWB);
+ cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIDATA, ent->sync.msidata);
cmd[1] |= ent->sync.msiaddr & CMDQ_SYNC_1_MSIADDR_MASK;
break;
default:
@@ -1239,7 +1221,7 @@ static irqreturn_t arm_smmu_evtq_thread(int irq, void *dev)
do {
while (!queue_remove_raw(q, evt)) {
- u8 id = evt[0] >> EVTQ_0_ID_SHIFT & EVTQ_0_ID_MASK;
+ u8 id = FIELD_GET(EVTQ_0_ID, evt[0]);
dev_info(smmu->dev, "event 0x%02x received:\n", id);
for (i = 0; i < ARRAY_SIZE(evt); ++i)
@@ -1267,11 +1249,11 @@ static void arm_smmu_handle_ppr(struct arm_smmu_device *smmu, u64 *evt)
u16 grpid;
bool ssv, last;
- sid = evt[0] >> PRIQ_0_SID_SHIFT & PRIQ_0_SID_MASK;
- ssv = evt[0] & PRIQ_0_SSID_V;
- ssid = ssv ? evt[0] >> PRIQ_0_SSID_SHIFT & PRIQ_0_SSID_MASK : 0;
- last = evt[0] & PRIQ_0_PRG_LAST;
- grpid = evt[1] >> PRIQ_1_PRG_IDX_SHIFT & PRIQ_1_PRG_IDX_MASK;
+ sid = FIELD_GET(PRIQ_0_SID, evt[0]);
+ ssv = FIELD_GET(PRIQ_0_SSID_V, evt[0]);
+ ssid = ssv ? FIELD_GET(PRIQ_0_SSID, evt[0]) : 0;
+ last = FIELD_GET(PRIQ_0_PRG_LAST, evt[0]);
+ grpid = FIELD_GET(PRIQ_1_PRG_IDX, evt[1]);
dev_info(smmu->dev, "unexpected PRI request received:\n");
dev_info(smmu->dev,
--
2.16.1.dirty
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 5/7] iommu/io-pgtable-arm: Support 52-bit physical address
[not found] ` <cover.1522065583.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
` (3 preceding siblings ...)
2018-03-26 12:35 ` [PATCH v3 4/7] iommu/arm-smmu-v3: Clean up queue definitions Robin Murphy
@ 2018-03-26 12:35 ` Robin Murphy
2018-03-26 12:35 ` [PATCH v3 6/7] iommu/arm-smmu-v3: " Robin Murphy
2018-03-26 12:35 ` [PATCH v3 7/7] iommu/arm-smmu-v3: Support 52-bit virtual address Robin Murphy
6 siblings, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2018-03-26 12:35 UTC (permalink / raw)
To: will.deacon-5wv7dgnIgG8, joro-zLv9SwRftAIdnm+yROfE0A
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Bring io-pgtable-arm in line with the ARMv8.2-LPA feature allowing
52-bit physical addresses when using the 64KB translation granule.
This will be supported by SMMUv3.1.
Tested-by: Nate Watterson <nwatters-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
v3: 64K-granule-specific logic in iopte_to_paddr() makes it much more
symmetrical with paddr_to_iopte() and generates shorter code.
I haven't implemented explicit input masking in paddr_to_iopte()
since I realised that if we did ever get an out-of-range address
there, it would only make the difference between silently mapping
the wrong address and silently mapping a slightly different wrong
address.
I also went to add a comment about io_pgtable_alloc() updating the
cfg, only to find that it's been documented as such from the start.
drivers/iommu/io-pgtable-arm.c | 67 ++++++++++++++++++++++++++++++------------
1 file changed, 49 insertions(+), 18 deletions(-)
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index 51e5c43caed1..a5be4c92c5c8 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -21,6 +21,7 @@
#define pr_fmt(fmt) "arm-lpae io-pgtable: " fmt
#include <linux/atomic.h>
+#include <linux/bitops.h>
#include <linux/iommu.h>
#include <linux/kernel.h>
#include <linux/sizes.h>
@@ -32,7 +33,7 @@
#include "io-pgtable.h"
-#define ARM_LPAE_MAX_ADDR_BITS 48
+#define ARM_LPAE_MAX_ADDR_BITS 52
#define ARM_LPAE_S2_MAX_CONCAT_PAGES 16
#define ARM_LPAE_MAX_LEVELS 4
@@ -86,6 +87,8 @@
#define ARM_LPAE_PTE_TYPE_TABLE 3
#define ARM_LPAE_PTE_TYPE_PAGE 3
+#define ARM_LPAE_PTE_ADDR_MASK GENMASK_ULL(47,12)
+
#define ARM_LPAE_PTE_NSTABLE (((arm_lpae_iopte)1) << 63)
#define ARM_LPAE_PTE_XN (((arm_lpae_iopte)3) << 53)
#define ARM_LPAE_PTE_AF (((arm_lpae_iopte)1) << 10)
@@ -159,6 +162,7 @@
#define ARM_LPAE_TCR_PS_42_BIT 0x3ULL
#define ARM_LPAE_TCR_PS_44_BIT 0x4ULL
#define ARM_LPAE_TCR_PS_48_BIT 0x5ULL
+#define ARM_LPAE_TCR_PS_52_BIT 0x6ULL
#define ARM_LPAE_MAIR_ATTR_SHIFT(n) ((n) << 3)
#define ARM_LPAE_MAIR_ATTR_MASK 0xff
@@ -170,9 +174,7 @@
#define ARM_LPAE_MAIR_ATTR_IDX_DEV 2
/* IOPTE accessors */
-#define iopte_deref(pte,d) \
- (__va((pte) & ((1ULL << ARM_LPAE_MAX_ADDR_BITS) - 1) \
- & ~(ARM_LPAE_GRANULE(d) - 1ULL)))
+#define iopte_deref(pte,d) __va(iopte_to_paddr(pte, d))
#define iopte_type(pte,l) \
(((pte) >> ARM_LPAE_PTE_TYPE_SHIFT) & ARM_LPAE_PTE_TYPE_MASK)
@@ -184,12 +186,6 @@
(iopte_type(pte,l) == ARM_LPAE_PTE_TYPE_PAGE) : \
(iopte_type(pte,l) == ARM_LPAE_PTE_TYPE_BLOCK))
-#define iopte_to_pfn(pte,d) \
- (((pte) & ((1ULL << ARM_LPAE_MAX_ADDR_BITS) - 1)) >> (d)->pg_shift)
-
-#define pfn_to_iopte(pfn,d) \
- (((pfn) << (d)->pg_shift) & ((1ULL << ARM_LPAE_MAX_ADDR_BITS) - 1))
-
struct arm_lpae_io_pgtable {
struct io_pgtable iop;
@@ -203,6 +199,27 @@ struct arm_lpae_io_pgtable {
typedef u64 arm_lpae_iopte;
+static arm_lpae_iopte paddr_to_iopte(phys_addr_t paddr,
+ struct arm_lpae_io_pgtable *data)
+{
+ arm_lpae_iopte pte = paddr;
+
+ /* Of the bits which overlap, either 51:48 or 15:12 are always RES0 */
+ return (pte | (pte >> (48 - 12))) & ARM_LPAE_PTE_ADDR_MASK;
+}
+
+static phys_addr_t iopte_to_paddr(arm_lpae_iopte pte,
+ struct arm_lpae_io_pgtable *data)
+{
+ phys_addr_t paddr = pte & ARM_LPAE_PTE_ADDR_MASK;
+
+ if (data->pg_shift < 16)
+ return paddr;
+
+ /* Rotate the packed high-order bits back to the top */
+ return (paddr | (paddr << (48 - 12))) & (ARM_LPAE_PTE_ADDR_MASK << 4);
+}
+
static bool selftest_running = false;
static dma_addr_t __arm_lpae_dma_addr(void *pages)
@@ -287,7 +304,7 @@ static void __arm_lpae_init_pte(struct arm_lpae_io_pgtable *data,
pte |= ARM_LPAE_PTE_TYPE_BLOCK;
pte |= ARM_LPAE_PTE_AF | ARM_LPAE_PTE_SH_IS;
- pte |= pfn_to_iopte(paddr >> data->pg_shift, data);
+ pte |= paddr_to_iopte(paddr, data);
__arm_lpae_set_pte(ptep, pte, &data->iop.cfg);
}
@@ -528,7 +545,7 @@ static int arm_lpae_split_blk_unmap(struct arm_lpae_io_pgtable *data,
if (size == split_sz)
unmap_idx = ARM_LPAE_LVL_IDX(iova, lvl, data);
- blk_paddr = iopte_to_pfn(blk_pte, data) << data->pg_shift;
+ blk_paddr = iopte_to_paddr(blk_pte, data);
pte = iopte_prot(blk_pte);
for (i = 0; i < tablesz / sizeof(pte); i++, blk_paddr += split_sz) {
@@ -652,12 +669,13 @@ static phys_addr_t arm_lpae_iova_to_phys(struct io_pgtable_ops *ops,
found_translation:
iova &= (ARM_LPAE_BLOCK_SIZE(lvl, data) - 1);
- return ((phys_addr_t)iopte_to_pfn(pte,data) << data->pg_shift) | iova;
+ return iopte_to_paddr(pte, data) | iova;
}
static void arm_lpae_restrict_pgsizes(struct io_pgtable_cfg *cfg)
{
- unsigned long granule;
+ unsigned long granule, page_sizes;
+ unsigned int max_addr_bits = 48;
/*
* We need to restrict the supported page sizes to match the
@@ -677,17 +695,24 @@ static void arm_lpae_restrict_pgsizes(struct io_pgtable_cfg *cfg)
switch (granule) {
case SZ_4K:
- cfg->pgsize_bitmap &= (SZ_4K | SZ_2M | SZ_1G);
+ page_sizes = (SZ_4K | SZ_2M | SZ_1G);
break;
case SZ_16K:
- cfg->pgsize_bitmap &= (SZ_16K | SZ_32M);
+ page_sizes = (SZ_16K | SZ_32M);
break;
case SZ_64K:
- cfg->pgsize_bitmap &= (SZ_64K | SZ_512M);
+ max_addr_bits = 52;
+ page_sizes = (SZ_64K | SZ_512M);
+ if (cfg->oas > 48)
+ page_sizes |= 1ULL << 42; /* 4TB */
break;
default:
- cfg->pgsize_bitmap = 0;
+ page_sizes = 0;
}
+
+ cfg->pgsize_bitmap &= page_sizes;
+ cfg->ias = min(cfg->ias, max_addr_bits);
+ cfg->oas = min(cfg->oas, max_addr_bits);
}
static struct arm_lpae_io_pgtable *
@@ -784,6 +809,9 @@ arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie)
case 48:
reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_IPS_SHIFT);
break;
+ case 52:
+ reg |= (ARM_LPAE_TCR_PS_52_BIT << ARM_LPAE_TCR_IPS_SHIFT);
+ break;
default:
goto out_free_data;
}
@@ -891,6 +919,9 @@ arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie)
case 48:
reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_PS_SHIFT);
break;
+ case 52:
+ reg |= (ARM_LPAE_TCR_PS_52_BIT << ARM_LPAE_TCR_PS_SHIFT);
+ break;
default:
goto out_free_data;
}
--
2.16.1.dirty
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 6/7] iommu/arm-smmu-v3: Support 52-bit physical address
[not found] ` <cover.1522065583.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
` (4 preceding siblings ...)
2018-03-26 12:35 ` [PATCH v3 5/7] iommu/io-pgtable-arm: Support 52-bit physical address Robin Murphy
@ 2018-03-26 12:35 ` Robin Murphy
2018-03-26 12:35 ` [PATCH v3 7/7] iommu/arm-smmu-v3: Support 52-bit virtual address Robin Murphy
6 siblings, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2018-03-26 12:35 UTC (permalink / raw)
To: will.deacon-5wv7dgnIgG8, joro-zLv9SwRftAIdnm+yROfE0A
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Implement SMMUv3.1 support for 52-bit physical addresses. Since a 52-bit
OAS implies 64KB translation granule support, permitting level 1 block
entries there is simple, and the rest is just extending address fields.
Tested-by: Nate Watterson <nwatters-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
v3: No change
drivers/iommu/arm-smmu-v3.c | 35 ++++++++++++++++++++---------------
1 file changed, 20 insertions(+), 15 deletions(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 4e0ffda217f6..e0d46661c153 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -91,6 +91,7 @@
#define IDR5_OAS_42_BIT 3
#define IDR5_OAS_44_BIT 4
#define IDR5_OAS_48_BIT 5
+#define IDR5_OAS_52_BIT 6
#define ARM_SMMU_CR0 0x20
#define CR0_CMDQEN (1 << 3)
@@ -147,7 +148,7 @@
#define ARM_SMMU_STRTAB_BASE 0x80
#define STRTAB_BASE_RA (1UL << 62)
-#define STRTAB_BASE_ADDR_MASK GENMASK_ULL(47, 6)
+#define STRTAB_BASE_ADDR_MASK GENMASK_ULL(51, 6)
#define ARM_SMMU_STRTAB_BASE_CFG 0x88
#define STRTAB_BASE_CFG_FMT GENMASK(17, 16)
@@ -175,7 +176,7 @@
#define ARM_SMMU_PRIQ_IRQ_CFG2 0xdc
/* Common MSI config fields */
-#define MSI_CFG0_ADDR_MASK GENMASK_ULL(47, 2)
+#define MSI_CFG0_ADDR_MASK GENMASK_ULL(51, 2)
#define MSI_CFG2_SH GENMASK(5, 4)
#define MSI_CFG2_MEMATTR GENMASK(3, 0)
@@ -194,7 +195,7 @@
Q_IDX(q, p) * (q)->ent_dwords)
#define Q_BASE_RWA (1UL << 62)
-#define Q_BASE_ADDR_MASK GENMASK_ULL(47, 5)
+#define Q_BASE_ADDR_MASK GENMASK_ULL(51, 5)
#define Q_BASE_LOG2SIZE GENMASK(4, 0)
/*
@@ -209,7 +210,7 @@
#define STRTAB_L1_DESC_DWORDS 1
#define STRTAB_L1_DESC_SPAN GENMASK_ULL(4, 0)
-#define STRTAB_L1_DESC_L2PTR_MASK GENMASK_ULL(47, 6)
+#define STRTAB_L1_DESC_L2PTR_MASK GENMASK_ULL(51, 6)
#define STRTAB_STE_DWORDS 8
#define STRTAB_STE_0_V (1UL << 0)
@@ -221,7 +222,7 @@
#define STRTAB_STE_0_S1FMT GENMASK_ULL(5, 4)
#define STRTAB_STE_0_S1FMT_LINEAR 0
-#define STRTAB_STE_0_S1CTXPTR_MASK GENMASK_ULL(47, 6)
+#define STRTAB_STE_0_S1CTXPTR_MASK GENMASK_ULL(51, 6)
#define STRTAB_STE_0_S1CDMAX GENMASK_ULL(63, 59)
#define STRTAB_STE_1_S1C_CACHE_NC 0UL
@@ -253,7 +254,7 @@
#define STRTAB_STE_2_S2PTW (1UL << 54)
#define STRTAB_STE_2_S2R (1UL << 58)
-#define STRTAB_STE_3_S2TTB_MASK GENMASK_ULL(47, 4)
+#define STRTAB_STE_3_S2TTB_MASK GENMASK_ULL(51, 4)
/* Context descriptor (stage-1 only) */
#define CTXDESC_CD_DWORDS 8
@@ -287,7 +288,7 @@
#define CTXDESC_CD_0_ASET (1UL << 47)
#define CTXDESC_CD_0_ASID GENMASK_ULL(63, 48)
-#define CTXDESC_CD_1_TTB0_MASK GENMASK_ULL(47, 4)
+#define CTXDESC_CD_1_TTB0_MASK GENMASK_ULL(51, 4)
/* Convert between AArch64 (CPU) TCR format and SMMU CD format */
#define ARM_SMMU_TCR2CD(tcr, fld) FIELD_PREP(CTXDESC_CD_0_TCR_##fld, \
@@ -317,7 +318,7 @@
#define CMDQ_TLBI_0_ASID GENMASK_ULL(63, 48)
#define CMDQ_TLBI_1_LEAF (1UL << 0)
#define CMDQ_TLBI_1_VA_MASK GENMASK_ULL(63, 12)
-#define CMDQ_TLBI_1_IPA_MASK GENMASK_ULL(47, 12)
+#define CMDQ_TLBI_1_IPA_MASK GENMASK_ULL(51, 12)
#define CMDQ_PRI_0_SSID GENMASK_ULL(31, 12)
#define CMDQ_PRI_0_SID GENMASK_ULL(63, 32)
@@ -331,7 +332,7 @@
#define CMDQ_SYNC_0_MSH GENMASK_ULL(23, 22)
#define CMDQ_SYNC_0_MSIATTR GENMASK_ULL(27, 24)
#define CMDQ_SYNC_0_MSIDATA GENMASK_ULL(63, 32)
-#define CMDQ_SYNC_1_MSIADDR_MASK GENMASK_ULL(47, 2)
+#define CMDQ_SYNC_1_MSIADDR_MASK GENMASK_ULL(51, 2)
/* Event queue */
#define EVTQ_ENT_DWORDS 4
@@ -1622,7 +1623,7 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
return -ENOMEM;
domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
- domain->geometry.aperture_end = (1UL << ias) - 1;
+ domain->geometry.aperture_end = (1UL << pgtbl_cfg.ias) - 1;
domain->geometry.force_aperture = true;
ret = finalise_stage_fn(smmu_domain, &pgtbl_cfg);
@@ -2633,11 +2634,6 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
if (reg & IDR5_GRAN4K)
smmu->pgsize_bitmap |= SZ_4K | SZ_2M | SZ_1G;
- if (arm_smmu_ops.pgsize_bitmap == -1UL)
- arm_smmu_ops.pgsize_bitmap = smmu->pgsize_bitmap;
- else
- arm_smmu_ops.pgsize_bitmap |= smmu->pgsize_bitmap;
-
/* Output address size */
switch (FIELD_GET(IDR5_OAS, reg)) {
case IDR5_OAS_32_BIT:
@@ -2655,6 +2651,10 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
case IDR5_OAS_44_BIT:
smmu->oas = 44;
break;
+ case IDR5_OAS_52_BIT:
+ smmu->oas = 52;
+ smmu->pgsize_bitmap |= 1ULL << 42; /* 4TB */
+ break;
default:
dev_info(smmu->dev,
"unknown output address size. Truncating to 48-bit\n");
@@ -2663,6 +2663,11 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
smmu->oas = 48;
}
+ if (arm_smmu_ops.pgsize_bitmap == -1UL)
+ arm_smmu_ops.pgsize_bitmap = smmu->pgsize_bitmap;
+ else
+ arm_smmu_ops.pgsize_bitmap |= smmu->pgsize_bitmap;
+
/* Set the DMA mask for our table walker */
if (dma_set_mask_and_coherent(smmu->dev, DMA_BIT_MASK(smmu->oas)))
dev_warn(smmu->dev,
--
2.16.1.dirty
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH v3 7/7] iommu/arm-smmu-v3: Support 52-bit virtual address
[not found] ` <cover.1522065583.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
` (5 preceding siblings ...)
2018-03-26 12:35 ` [PATCH v3 6/7] iommu/arm-smmu-v3: " Robin Murphy
@ 2018-03-26 12:35 ` Robin Murphy
6 siblings, 0 replies; 8+ messages in thread
From: Robin Murphy @ 2018-03-26 12:35 UTC (permalink / raw)
To: will.deacon-5wv7dgnIgG8, joro-zLv9SwRftAIdnm+yROfE0A
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Stage 1 input addresses are effectively 64-bit in SMMUv3 anyway, so
really all that's involved is letting io-pgtable know the appropriate
upper bound for T0SZ.
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
v3: Fix IDR5.VAX being a 2-bit field, and slight reorganisation of the
stage 1 IAS logic. Since constraining to VA_BITS turns out to be an
SMMUv3-specific behaviour, and would introduce an undesirable arm64
dependency to io-pgtable, I ended up leaving it here.
drivers/iommu/arm-smmu-v3.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index e0d46661c153..b0e23d6bd1ef 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -92,6 +92,8 @@
#define IDR5_OAS_44_BIT 4
#define IDR5_OAS_48_BIT 5
#define IDR5_OAS_52_BIT 6
+#define IDR5_VAX GENMASK(11, 10)
+#define IDR5_VAX_52_BIT 1
#define ARM_SMMU_CR0 0x20
#define CR0_CMDQEN (1 << 3)
@@ -551,6 +553,7 @@ struct arm_smmu_device {
#define ARM_SMMU_FEAT_STALLS (1 << 11)
#define ARM_SMMU_FEAT_HYP (1 << 12)
#define ARM_SMMU_FEAT_STALL_FORCE (1 << 13)
+#define ARM_SMMU_FEAT_VAX (1 << 14)
u32 features;
#define ARM_SMMU_OPT_SKIP_PREFETCH (1 << 0)
@@ -1591,7 +1594,8 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
switch (smmu_domain->stage) {
case ARM_SMMU_DOMAIN_S1:
- ias = VA_BITS;
+ ias = (smmu->features & ARM_SMMU_FEAT_VAX) ? 52 : 48;
+ ias = min_t(unsigned long, ias, VA_BITS);
oas = smmu->ias;
fmt = ARM_64_LPAE_S1;
finalise_stage_fn = arm_smmu_domain_finalise_s1;
@@ -2634,6 +2638,10 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
if (reg & IDR5_GRAN4K)
smmu->pgsize_bitmap |= SZ_4K | SZ_2M | SZ_1G;
+ /* Input address size */
+ if (FIELD_GET(IDR5_VAX, reg) == IDR5_VAX_52_BIT)
+ smmu->features |= ARM_SMMU_FEAT_VAX;
+
/* Output address size */
switch (FIELD_GET(IDR5_OAS, reg)) {
case IDR5_OAS_32_BIT:
--
2.16.1.dirty
^ permalink raw reply related [flat|nested] 8+ messages in thread