[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 05/10] xen/arm: smmuv3: Remove the page 1 fixup
Backport Linux commit 86d2d9214880c1879cb0ff466cce2fcd9c853e44 "iommu/arm-smmu-v3: Remove the page 1 fixup" Original commit message: iommu/arm-smmu-v3: Remove the page 1 fixup Since we now keep track of page 1 via a separate pointer that already encapsulates aliasing to page 0 as necessary, we can remove the clunky fixup routine and simply use the relevant bases directly. The current architecture spec (IHI0070D.a) defines SMMU_{EVENTQ,PRIQ}_{PROD,CONS} as offsets relative to page 1, so the cleanup represents a little bit of convergence as well as just lines of code saved. Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx> Signed-off-by: Will Deacon <will@xxxxxxxxxx> Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx> --- xen/drivers/passthrough/arm/smmu-v3.c | 42 ++++++++++----------------- xen/drivers/passthrough/arm/smmu-v3.h | 8 ++--- 2 files changed, 20 insertions(+), 30 deletions(-) diff --git a/xen/drivers/passthrough/arm/smmu-v3.c b/xen/drivers/passthrough/arm/smmu-v3.c index 6a63fcfd04..86f4cb7514 100644 --- a/xen/drivers/passthrough/arm/smmu-v3.c +++ b/xen/drivers/passthrough/arm/smmu-v3.c @@ -525,15 +525,6 @@ static struct arm_smmu_option_prop arm_smmu_options[] = { { 0, NULL}, }; -static inline void __iomem *arm_smmu_page1_fixup(unsigned long offset, - struct arm_smmu_device *smmu) -{ - if (offset > SZ_64K) - return smmu->page1 + offset - SZ_64K; - - return smmu->base + offset; -} - static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom) { return container_of(dom, struct arm_smmu_domain, domain); @@ -1868,6 +1859,7 @@ static int arm_smmu_dt_xlate(struct device *dev, /* Probing and initialisation functions */ static int arm_smmu_init_one_queue(struct arm_smmu_device *smmu, struct arm_smmu_queue *q, + void __iomem *page, unsigned long prod_off, unsigned long cons_off, size_t dwords, const char *name) @@ -1896,8 +1888,8 @@ static int arm_smmu_init_one_queue(struct arm_smmu_device *smmu, 1 << q->llq.max_n_shift, name); } - q->prod_reg = arm_smmu_page1_fixup(prod_off, smmu); - q->cons_reg = arm_smmu_page1_fixup(cons_off, smmu); + q->prod_reg = page + prod_off; + q->cons_reg = page + prod_off; q->ent_dwords = dwords; q->q_base = Q_BASE_RWA; @@ -1914,16 +1906,16 @@ static int arm_smmu_init_queues(struct arm_smmu_device *smmu) /* cmdq */ spin_lock_init(&smmu->cmdq.lock); - ret = arm_smmu_init_one_queue(smmu, &smmu->cmdq.q, ARM_SMMU_CMDQ_PROD, - ARM_SMMU_CMDQ_CONS, CMDQ_ENT_DWORDS, - "cmdq"); + ret = arm_smmu_init_one_queue(smmu, &smmu->cmdq.q, smmu->base, + ARM_SMMU_CMDQ_PROD, ARM_SMMU_CMDQ_CONS, + CMDQ_ENT_DWORDS, "cmdq"); if (ret) return ret; /* evtq */ - ret = arm_smmu_init_one_queue(smmu, &smmu->evtq.q, ARM_SMMU_EVTQ_PROD, - ARM_SMMU_EVTQ_CONS, EVTQ_ENT_DWORDS, - "evtq"); + ret = arm_smmu_init_one_queue(smmu, &smmu->evtq.q, smmu->page1, + ARM_SMMU_EVTQ_PROD, ARM_SMMU_EVTQ_CONS, + EVTQ_ENT_DWORDS, "evtq"); if (ret) return ret; @@ -1931,9 +1923,9 @@ static int arm_smmu_init_queues(struct arm_smmu_device *smmu) if (!(smmu->features & ARM_SMMU_FEAT_PRI)) return 0; - return arm_smmu_init_one_queue(smmu, &smmu->priq.q, ARM_SMMU_PRIQ_PROD, - ARM_SMMU_PRIQ_CONS, PRIQ_ENT_DWORDS, - "priq"); + return arm_smmu_init_one_queue(smmu, &smmu->priq.q, smmu->page1, + ARM_SMMU_PRIQ_PROD, ARM_SMMU_PRIQ_CONS, + PRIQ_ENT_DWORDS, "priq"); } static int arm_smmu_init_l1_strtab(struct arm_smmu_device *smmu) @@ -2377,10 +2369,8 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu) /* Event queue */ writeq_relaxed(smmu->evtq.q.q_base, smmu->base + ARM_SMMU_EVTQ_BASE); - writel_relaxed(smmu->evtq.q.llq.prod, - arm_smmu_page1_fixup(ARM_SMMU_EVTQ_PROD, smmu)); - writel_relaxed(smmu->evtq.q.llq.cons, - arm_smmu_page1_fixup(ARM_SMMU_EVTQ_CONS, smmu)); + writel_relaxed(smmu->evtq.q.llq.prod, smmu->page1 + ARM_SMMU_EVTQ_PROD); + writel_relaxed(smmu->evtq.q.llq.cons, smmu->page1 + ARM_SMMU_EVTQ_CONS); enables |= CR0_EVTQEN; ret = arm_smmu_write_reg_sync(smmu, enables, ARM_SMMU_CR0, @@ -2395,9 +2385,9 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu) writeq_relaxed(smmu->priq.q.q_base, smmu->base + ARM_SMMU_PRIQ_BASE); writel_relaxed(smmu->priq.q.llq.prod, - arm_smmu_page1_fixup(ARM_SMMU_PRIQ_PROD, smmu)); + smmu->page1 + ARM_SMMU_PRIQ_PROD); writel_relaxed(smmu->priq.q.llq.cons, - arm_smmu_page1_fixup(ARM_SMMU_PRIQ_CONS, smmu)); + smmu->page1 + ARM_SMMU_PRIQ_CONS); enables |= CR0_PRIQEN; ret = arm_smmu_write_reg_sync(smmu, enables, ARM_SMMU_CR0, diff --git a/xen/drivers/passthrough/arm/smmu-v3.h b/xen/drivers/passthrough/arm/smmu-v3.h index 3a63cd6678..01e7979016 100644 --- a/xen/drivers/passthrough/arm/smmu-v3.h +++ b/xen/drivers/passthrough/arm/smmu-v3.h @@ -130,15 +130,15 @@ #define ARM_SMMU_CMDQ_CONS 0x9c #define ARM_SMMU_EVTQ_BASE 0xa0 -#define ARM_SMMU_EVTQ_PROD 0x100a8 -#define ARM_SMMU_EVTQ_CONS 0x100ac +#define ARM_SMMU_EVTQ_PROD 0xa8 +#define ARM_SMMU_EVTQ_CONS 0xac #define ARM_SMMU_EVTQ_IRQ_CFG0 0xb0 #define ARM_SMMU_EVTQ_IRQ_CFG1 0xb8 #define ARM_SMMU_EVTQ_IRQ_CFG2 0xbc #define ARM_SMMU_PRIQ_BASE 0xc0 -#define ARM_SMMU_PRIQ_PROD 0x100c8 -#define ARM_SMMU_PRIQ_CONS 0x100cc +#define ARM_SMMU_PRIQ_PROD 0xc8 +#define ARM_SMMU_PRIQ_CONS 0xcc #define ARM_SMMU_PRIQ_IRQ_CFG0 0xd0 #define ARM_SMMU_PRIQ_IRQ_CFG1 0xd8 #define ARM_SMMU_PRIQ_IRQ_CFG2 0xdc -- 2.25.1
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