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Subject[v4 07/11] soc/fsl/qbman: Rework portal mapping calls for ARM/PPC
Date
Rework portal mapping for PPC and ARM. The PPC devices require a
cacheable coherent mapping while ARM will work with a non-cachable/write
combine mapping. This also eliminates the need for manual cache
flushes on ARM

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
---
drivers/soc/fsl/qbman/bman.c | 6 +++---
drivers/soc/fsl/qbman/bman_portal.c | 36 +++++++++++++++++++++++-------------
drivers/soc/fsl/qbman/bman_priv.h | 8 +++-----
drivers/soc/fsl/qbman/dpaa_sys.h | 8 ++++----
drivers/soc/fsl/qbman/qman.c | 6 +++---
drivers/soc/fsl/qbman/qman_portal.c | 36 +++++++++++++++++++++++-------------
drivers/soc/fsl/qbman/qman_priv.h | 8 +++-----
7 files changed, 62 insertions(+), 46 deletions(-)

diff --git a/drivers/soc/fsl/qbman/bman.c b/drivers/soc/fsl/qbman/bman.c
index ff8998f..e31c843 100644
--- a/drivers/soc/fsl/qbman/bman.c
+++ b/drivers/soc/fsl/qbman/bman.c
@@ -154,7 +154,7 @@ struct bm_mc {
};

struct bm_addr {
- void __iomem *ce; /* cache-enabled */
+ void *ce; /* cache-enabled */
void __iomem *ci; /* cache-inhibited */
};

@@ -512,8 +512,8 @@ static int bman_create_portal(struct bman_portal *portal,
* config, everything that follows depends on it and "config" is more
* for (de)reference...
*/
- p->addr.ce = c->addr_virt[DPAA_PORTAL_CE];
- p->addr.ci = c->addr_virt[DPAA_PORTAL_CI];
+ p->addr.ce = c->addr_virt_ce;
+ p->addr.ci = c->addr_virt_ci;
if (bm_rcr_init(p, bm_rcr_pvb, bm_rcr_cce)) {
dev_err(c->dev, "RCR initialisation failed\n");
goto fail_rcr;
diff --git a/drivers/soc/fsl/qbman/bman_portal.c b/drivers/soc/fsl/qbman/bman_portal.c
index 39b39c8..bb03503 100644
--- a/drivers/soc/fsl/qbman/bman_portal.c
+++ b/drivers/soc/fsl/qbman/bman_portal.c
@@ -91,7 +91,6 @@ static int bman_portal_probe(struct platform_device *pdev)
struct device_node *node = dev->of_node;
struct bm_portal_config *pcfg;
struct resource *addr_phys[2];
- void __iomem *va;
int irq, cpu;

pcfg = devm_kmalloc(dev, sizeof(*pcfg), GFP_KERNEL);
@@ -123,23 +122,34 @@ static int bman_portal_probe(struct platform_device *pdev)
}
pcfg->irq = irq;

- va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]), 0);
- if (!va) {
- dev_err(dev, "ioremap::CE failed\n");
+ /*
+ * TODO: Ultimately we would like to use a cacheable/non-shareable
+ * (coherent) mapping for the portal on both architectures but that
+ * isn't currently available in the kernel. Because of HW differences
+ * PPC needs to be mapped cacheable while ARM SoCs will work with non
+ * cacheable mappings
+ */
+#ifdef CONFIG_PPC
+ /* PPC requires a cacheable/non-coherent mapping of the portal */
+ pcfg->addr_virt_ce = memremap(addr_phys[0]->start,
+ resource_size(addr_phys[0]), MEMREMAP_WB);
+#else
+ /* ARM can use a write combine mapping. */
+ pcfg->addr_virt_ce = memremap(addr_phys[0]->start,
+ resource_size(addr_phys[0]), MEMREMAP_WC);
+#endif
+ if (!pcfg->addr_virt_ce) {
+ dev_err(dev, "memremap::CE failed\n");
goto err_ioremap1;
}

- pcfg->addr_virt[DPAA_PORTAL_CE] = va;
-
- va = ioremap_prot(addr_phys[1]->start, resource_size(addr_phys[1]),
- _PAGE_GUARDED | _PAGE_NO_CACHE);
- if (!va) {
+ pcfg->addr_virt_ci = ioremap(addr_phys[1]->start,
+ resource_size(addr_phys[1]));
+ if (!pcfg->addr_virt_ci) {
dev_err(dev, "ioremap::CI failed\n");
goto err_ioremap2;
}

- pcfg->addr_virt[DPAA_PORTAL_CI] = va;
-
spin_lock(&bman_lock);
cpu = cpumask_next_zero(-1, &portal_cpus);
if (cpu >= nr_cpu_ids) {
@@ -164,9 +174,9 @@ static int bman_portal_probe(struct platform_device *pdev)
return 0;

err_portal_init:
- iounmap(pcfg->addr_virt[DPAA_PORTAL_CI]);
+ iounmap(pcfg->addr_virt_ci);
err_ioremap2:
- iounmap(pcfg->addr_virt[DPAA_PORTAL_CE]);
+ memunmap(pcfg->addr_virt_ce);
err_ioremap1:
return -ENXIO;
}
diff --git a/drivers/soc/fsl/qbman/bman_priv.h b/drivers/soc/fsl/qbman/bman_priv.h
index 765a4bf..c48e6eb 100644
--- a/drivers/soc/fsl/qbman/bman_priv.h
+++ b/drivers/soc/fsl/qbman/bman_priv.h
@@ -49,11 +49,9 @@ extern u16 bman_ip_rev; /* 0 if uninitialised, otherwise BMAN_REVx */
extern struct gen_pool *bm_bpalloc;

struct bm_portal_config {
- /*
- * Corenet portal addresses;
- * [0]==cache-enabled, [1]==cache-inhibited.
- */
- void __iomem *addr_virt[2];
+ /* Portal addresses */
+ void *addr_virt_ce;
+ void __iomem *addr_virt_ci;
/* Allow these to be joined in lists */
struct list_head list;
struct device *dev;
diff --git a/drivers/soc/fsl/qbman/dpaa_sys.h b/drivers/soc/fsl/qbman/dpaa_sys.h
index 81a9a5e..0a1d573 100644
--- a/drivers/soc/fsl/qbman/dpaa_sys.h
+++ b/drivers/soc/fsl/qbman/dpaa_sys.h
@@ -51,12 +51,12 @@

static inline void dpaa_flush(void *p)
{
+ /*
+ * Only PPC needs to flush the cache currently - on ARM the mapping
+ * is non cacheable
+ */
#ifdef CONFIG_PPC
flush_dcache_range((unsigned long)p, (unsigned long)p+64);
-#elif defined(CONFIG_ARM)
- __cpuc_flush_dcache_area(p, 64);
-#elif defined(CONFIG_ARM64)
- __flush_dcache_area(p, 64);
#endif
}

diff --git a/drivers/soc/fsl/qbman/qman.c b/drivers/soc/fsl/qbman/qman.c
index 25419e1..668fab1 100644
--- a/drivers/soc/fsl/qbman/qman.c
+++ b/drivers/soc/fsl/qbman/qman.c
@@ -300,7 +300,7 @@ struct qm_mc {
};

struct qm_addr {
- void __iomem *ce; /* cache-enabled */
+ void *ce; /* cache-enabled */
void __iomem *ci; /* cache-inhibited */
};

@@ -1123,8 +1123,8 @@ static int qman_create_portal(struct qman_portal *portal,
* config, everything that follows depends on it and "config" is more
* for (de)reference
*/
- p->addr.ce = c->addr_virt[DPAA_PORTAL_CE];
- p->addr.ci = c->addr_virt[DPAA_PORTAL_CI];
+ p->addr.ce = c->addr_virt_ce;
+ p->addr.ci = c->addr_virt_ci;
/*
* If CI-stashing is used, the current defaults use a threshold of 3,
* and stash with high-than-DQRR priority.
diff --git a/drivers/soc/fsl/qbman/qman_portal.c b/drivers/soc/fsl/qbman/qman_portal.c
index cbacdf4..41fe33a 100644
--- a/drivers/soc/fsl/qbman/qman_portal.c
+++ b/drivers/soc/fsl/qbman/qman_portal.c
@@ -224,7 +224,6 @@ static int qman_portal_probe(struct platform_device *pdev)
struct device_node *node = dev->of_node;
struct qm_portal_config *pcfg;
struct resource *addr_phys[2];
- void __iomem *va;
int irq, cpu, err;
u32 val;

@@ -262,23 +261,34 @@ static int qman_portal_probe(struct platform_device *pdev)
}
pcfg->irq = irq;

- va = ioremap_prot(addr_phys[0]->start, resource_size(addr_phys[0]), 0);
- if (!va) {
- dev_err(dev, "ioremap::CE failed\n");
+ /*
+ * TODO: Ultimately we would like to use a cacheable/non-shareable
+ * (coherent) mapping for the portal on both architectures but that
+ * isn't currently available in the kernel. Because of HW differences
+ * PPC needs to be mapped cacheable while ARM SoCs will work with non
+ * cacheable mappings
+ */
+#ifdef CONFIG_PPC
+ /* PPC requires a cacheable mapping of the portal */
+ pcfg->addr_virt_ce = memremap(addr_phys[0]->start,
+ resource_size(addr_phys[0]), MEMREMAP_WB);
+#else
+ /* ARM can use write combine mapping for the cacheable area */
+ pcfg->addr_virt_ce = memremap(addr_phys[0]->start,
+ resource_size(addr_phys[0]), MEMREMAP_WT);
+#endif
+ if (!pcfg->addr_virt_ce) {
+ dev_err(dev, "memremap::CE failed\n");
goto err_ioremap1;
}

- pcfg->addr_virt[DPAA_PORTAL_CE] = va;
-
- va = ioremap_prot(addr_phys[1]->start, resource_size(addr_phys[1]),
- _PAGE_GUARDED | _PAGE_NO_CACHE);
- if (!va) {
+ pcfg->addr_virt_ci = ioremap(addr_phys[1]->start,
+ resource_size(addr_phys[1]));
+ if (!pcfg->addr_virt_ci) {
dev_err(dev, "ioremap::CI failed\n");
goto err_ioremap2;
}

- pcfg->addr_virt[DPAA_PORTAL_CI] = va;
-
pcfg->pools = qm_get_pools_sdqcr();

spin_lock(&qman_lock);
@@ -310,9 +320,9 @@ static int qman_portal_probe(struct platform_device *pdev)
return 0;

err_portal_init:
- iounmap(pcfg->addr_virt[DPAA_PORTAL_CI]);
+ iounmap(pcfg->addr_virt_ci);
err_ioremap2:
- iounmap(pcfg->addr_virt[DPAA_PORTAL_CE]);
+ memunmap(pcfg->addr_virt_ce);
err_ioremap1:
return -ENXIO;
}
diff --git a/drivers/soc/fsl/qbman/qman_priv.h b/drivers/soc/fsl/qbman/qman_priv.h
index 957ef54..bab7f15 100644
--- a/drivers/soc/fsl/qbman/qman_priv.h
+++ b/drivers/soc/fsl/qbman/qman_priv.h
@@ -155,11 +155,9 @@ static inline void qman_cgrs_xor(struct qman_cgrs *dest,
void qman_init_cgr_all(void);

struct qm_portal_config {
- /*
- * Corenet portal addresses;
- * [0]==cache-enabled, [1]==cache-inhibited.
- */
- void __iomem *addr_virt[2];
+ /* Portal addresses */
+ void *addr_virt_ce;
+ void __iomem *addr_virt_ci;
struct device *dev;
struct iommu_domain *iommu_domain;
/* Allow these to be joined in lists */
--
2.7.4
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