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Message-ID: <20240126235425.12233-32-quic_obabatun@quicinc.com>
Date: Fri, 26 Jan 2024 15:54:10 -0800
From: Oreoluwa Babatunde <quic_obabatun@...cinc.com>
To: <catalin.marinas@....com>, <will@...nel.org>, <robh+dt@...nel.org>,
<frowand.list@...il.com>, <vgupta@...nel.org>, <arnd@...db.de>,
<olof@...om.net>, <soc@...nel.org>, <guoren@...nel.org>,
<monstr@...str.eu>, <palmer@...belt.com>, <aou@...s.berkeley.edu>,
<dinguyen@...nel.org>, <chenhuacai@...nel.org>,
<tsbogend@...ha.franken.de>, <jonas@...thpole.se>,
<stefan.kristiansson@...nalahti.fi>, <shorne@...il.com>,
<mpe@...erman.id.au>, <ysato@...rs.sourceforge.jp>, <dalias@...c.org>,
<glaubitz@...sik.fu-berlin.de>, <richard@....at>,
<anton.ivanov@...bridgegreys.com>, <johannes@...solutions.net>,
<chris@...kel.net>, <jcmvbkbc@...il.com>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
<kernel@...cinc.com>, Oreoluwa Babatunde <quic_obabatun@...cinc.com>
Subject: [PATCH 31/46] of: reserved_mem: Rename fdt_* functions to refelct use of unflattened devicetree APIs
Rename the relevant fdt_* functions to a new scheme dt_* to reflect the
use of the unflattened devicetree APIs to process the reserved memory
regions.
Signed-off-by: Oreoluwa Babatunde <quic_obabatun@...cinc.com>
---
drivers/of/of_private.h | 4 +--
drivers/of/of_reserved_mem.c | 64 ++++++++++++++++++++++++++++++---
include/linux/of_reserved_mem.h | 3 ++
3 files changed, 64 insertions(+), 7 deletions(-)
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index f7da22108e7a..1092615faa90 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -177,7 +177,7 @@ static inline struct device_node *__of_get_dma_parent(const struct device_node *
#endif
void update_reserved_mem_max_cnt(int max_count);
-void fdt_reserved_mem_save_node(struct device_node *node, const char *uname,
- phys_addr_t base, phys_addr_t size);
+void dt_reserved_mem_save_node(struct device_node *node, const char *uname,
+ phys_addr_t base, phys_addr_t size);
#endif /* _LINUX_OF_PRIVATE_H */
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 645b02e27492..3650efab0afd 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -139,15 +139,15 @@ static void __init dt_scan_reserved_mem_reg_nodes(void)
size = dt_mem_next_cell(dt_root_size_cells, &prop);
if (size)
- fdt_reserved_mem_save_node(child, uname, base, size);
+ dt_reserved_mem_save_node(child, uname, base, size);
}
}
/*
- * fdt_reserved_mem_save_node() - save fdt node for second pass initialization
+ * dt_reserved_mem_save_node() - save dt node for second pass initialization
*/
-void __init fdt_reserved_mem_save_node(struct device_node *node, const char *uname,
- phys_addr_t base, phys_addr_t size)
+void __init dt_reserved_mem_save_node(struct device_node *node, const char *uname,
+ phys_addr_t base, phys_addr_t size)
{
struct reserved_mem *rmem = &reserved_mem[reserved_mem_count];
@@ -299,7 +299,7 @@ int __init __reserved_mem_alloc_size(unsigned long node, const char *uname)
uname, (unsigned long)(size / SZ_1M));
return -ENOMEM;
}
- fdt_reserved_mem_save_node(NULL, uname, base, size);
+ dt_reserved_mem_save_node(NULL, uname, base, size);
return 0;
}
@@ -436,6 +436,60 @@ void __init fdt_init_reserved_mem(void)
}
}
+/**
+ * dt_init_reserved_mem() - allocate and init all saved reserved memory regions
+ */
+void __init dt_init_reserved_mem(void)
+{
+ int i, ret;
+
+ ret = alloc_reserved_mem_array();
+ if (ret)
+ pr_err("Failed to allocate memory for reserved_mem array with err: %d", ret);
+
+ dt_scan_reserved_mem_reg_nodes();
+
+ /* check for overlapping reserved regions */
+ __rmem_check_for_overlap();
+
+ for (i = 0; i < reserved_mem_count; i++) {
+ struct reserved_mem *rmem = &reserved_mem[i];
+ struct device_node *node = rmem->dev_node;
+ int len;
+ const __be32 *prop;
+ int err = 0;
+ bool nomap;
+
+ nomap = of_get_property(node, "no-map", NULL) != NULL;
+ prop = of_get_property(node, "phandle", &len);
+ if (!prop)
+ prop = of_get_property(node, "linux,phandle", &len);
+ if (prop)
+ rmem->phandle = of_read_number(prop, len/4);
+
+ err = __reserved_mem_init_node(rmem);
+ if (err != 0 && err != -ENOENT) {
+ pr_info("node %s compatible matching fail\n",
+ rmem->name);
+ if (nomap)
+ memblock_clear_nomap(rmem->base, rmem->size);
+ else
+ memblock_phys_free(rmem->base,
+ rmem->size);
+ } else {
+ phys_addr_t end = rmem->base + rmem->size - 1;
+ bool reusable =
+ (of_get_property(node, "reusable", NULL)) != NULL;
+
+ pr_info("%pa..%pa (%lu KiB) %s %s %s\n",
+ &rmem->base, &end, (unsigned long)(rmem->size / SZ_1K),
+ nomap ? "nomap" : "map",
+ reusable ? "reusable" : "non-reusable",
+ rmem->name ? rmem->name : "unknown");
+ }
+ }
+}
+
static inline struct reserved_mem *__find_rmem(struct device_node *node)
{
unsigned int i;
diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h
index e92babd669c2..b1f71a4894aa 100644
--- a/include/linux/of_reserved_mem.h
+++ b/include/linux/of_reserved_mem.h
@@ -32,6 +32,7 @@ typedef int (*reservedmem_of_init_fn)(struct reserved_mem *rmem);
#define RESERVEDMEM_OF_DECLARE(name, compat, init) \
_OF_DECLARE(reservedmem, name, compat, init, reservedmem_of_init_fn)
+void dt_init_reserved_mem(void);
void fdt_init_reserved_mem(void);
int of_reserved_mem_device_init_by_idx(struct device *dev,
struct device_node *np, int idx);
@@ -47,6 +48,8 @@ struct reserved_mem *of_reserved_mem_lookup(struct device_node *np);
#define RESERVEDMEM_OF_DECLARE(name, compat, init) \
_OF_DECLARE_STUB(reservedmem, name, compat, init, reservedmem_of_init_fn)
+static inline void dt_init_reserved_mem(void) { }
+
static inline void fdt_init_reserved_mem(void) { }
static inline int of_reserved_mem_device_init_by_idx(struct device *dev,
--
2.17.1
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