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Diffstat (limited to 'drivers/misc/cxl/of.c')
-rw-r--r--drivers/misc/cxl/of.c207
1 files changed, 23 insertions, 184 deletions
diff --git a/drivers/misc/cxl/of.c b/drivers/misc/cxl/of.c
index bcc005dff1c0..03633cccd043 100644
--- a/drivers/misc/cxl/of.c
+++ b/drivers/misc/cxl/of.c
@@ -7,65 +7,12 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include "cxl.h"
-
-static const __be32 *read_prop_string(const struct device_node *np,
- const char *prop_name)
-{
- const __be32 *prop;
-
- prop = of_get_property(np, prop_name, NULL);
- if (cxl_verbose && prop)
- pr_info("%s: %s\n", prop_name, (char *) prop);
- return prop;
-}
-
-static const __be32 *read_prop_dword(const struct device_node *np,
- const char *prop_name, u32 *val)
-{
- const __be32 *prop;
-
- prop = of_get_property(np, prop_name, NULL);
- if (prop)
- *val = be32_to_cpu(prop[0]);
- if (cxl_verbose && prop)
- pr_info("%s: %#x (%u)\n", prop_name, *val, *val);
- return prop;
-}
-
-static const __be64 *read_prop64_dword(const struct device_node *np,
- const char *prop_name, u64 *val)
-{
- const __be64 *prop;
-
- prop = of_get_property(np, prop_name, NULL);
- if (prop)
- *val = be64_to_cpu(prop[0]);
- if (cxl_verbose && prop)
- pr_info("%s: %#llx (%llu)\n", prop_name, *val, *val);
- return prop;
-}
-
-
-static int read_handle(struct device_node *np, u64 *handle)
-{
- const __be32 *prop;
- u64 size;
-
- /* Get address and size of the node */
- prop = of_get_address(np, 0, &size, NULL);
- if (size)
- return -EINVAL;
-
- /* Helper to read a big number; size is in cells (not bytes) */
- *handle = of_read_number(prop, of_n_addr_cells(np));
- return 0;
-}
-
static int read_phys_addr(struct device_node *np, char *prop_name,
struct cxl_afu *afu)
{
@@ -100,9 +47,6 @@ static int read_phys_addr(struct device_node *np, char *prop_name,
type, prop_name);
return -EINVAL;
}
- if (cxl_verbose)
- pr_info("%s: %#x %#llx (size %#llx)\n",
- prop_name, type, addr, size);
}
}
return 0;
@@ -130,36 +74,17 @@ static int read_vpd(struct cxl *adapter, struct cxl_afu *afu)
int cxl_of_read_afu_handle(struct cxl_afu *afu, struct device_node *afu_np)
{
- if (read_handle(afu_np, &afu->guest->handle))
- return -EINVAL;
- pr_devel("AFU handle: 0x%.16llx\n", afu->guest->handle);
-
- return 0;
+ return of_property_read_reg(afu_np, 0, &afu->guest->handle, NULL);
}
int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *np)
{
- int i, len, rc;
- char *p;
- const __be32 *prop;
+ int i, rc;
u16 device_id, vendor_id;
u32 val = 0, class_code;
/* Properties are read in the same order as listed in PAPR */
- if (cxl_verbose) {
- pr_info("Dump of the 'ibm,coherent-platform-function' node properties:\n");
-
- prop = of_get_property(np, "compatible", &len);
- i = 0;
- while (i < len) {
- p = (char *) prop + i;
- pr_info("compatible: %s\n", p);
- i += strlen(p) + 1;
- }
- read_prop_string(np, "name");
- }
-
rc = read_phys_addr(np, "reg", afu);
if (rc)
return rc;
@@ -173,25 +98,15 @@ int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *np)
else
afu->psa = true;
- if (cxl_verbose) {
- read_prop_string(np, "ibm,loc-code");
- read_prop_string(np, "device_type");
- }
+ of_property_read_u32(np, "ibm,#processes", &afu->max_procs_virtualised);
- read_prop_dword(np, "ibm,#processes", &afu->max_procs_virtualised);
-
- if (cxl_verbose) {
- read_prop_dword(np, "ibm,scratchpad-size", &val);
- read_prop_dword(np, "ibm,programmable", &val);
- read_prop_string(np, "ibm,phandle");
+ if (cxl_verbose)
read_vpd(NULL, afu);
- }
- read_prop_dword(np, "ibm,max-ints-per-process", &afu->guest->max_ints);
+ of_property_read_u32(np, "ibm,max-ints-per-process", &afu->guest->max_ints);
afu->irqs_max = afu->guest->max_ints;
- prop = read_prop_dword(np, "ibm,min-ints-per-process", &afu->pp_irqs);
- if (prop) {
+ if (!of_property_read_u32(np, "ibm,min-ints-per-process", &afu->pp_irqs)) {
/* One extra interrupt for the PSL interrupt is already
* included. Remove it now to keep only AFU interrupts and
* match the native case.
@@ -199,21 +114,13 @@ int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *np)
afu->pp_irqs--;
}
- if (cxl_verbose) {
- read_prop_dword(np, "ibm,max-ints", &val);
- read_prop_dword(np, "ibm,vpd-size", &val);
- }
-
- read_prop64_dword(np, "ibm,error-buffer-size", &afu->eb_len);
+ of_property_read_u64(np, "ibm,error-buffer-size", &afu->eb_len);
afu->eb_offset = 0;
- if (cxl_verbose)
- read_prop_dword(np, "ibm,config-record-type", &val);
-
- read_prop64_dword(np, "ibm,config-record-size", &afu->crs_len);
+ of_property_read_u64(np, "ibm,config-record-size", &afu->crs_len);
afu->crs_offset = 0;
- read_prop_dword(np, "ibm,#config-records", &afu->crs_num);
+ of_property_read_u32(np, "ibm,#config-records", &afu->crs_num);
if (cxl_verbose) {
for (i = 0; i < afu->crs_num; i++) {
@@ -235,35 +142,18 @@ int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *np)
i, class_code);
}
}
-
- read_prop_dword(np, "ibm,function-number", &val);
- read_prop_dword(np, "ibm,privileged-function", &val);
- read_prop_dword(np, "vendor-id", &val);
- read_prop_dword(np, "device-id", &val);
- read_prop_dword(np, "revision-id", &val);
- read_prop_dword(np, "class-code", &val);
- read_prop_dword(np, "subsystem-vendor-id", &val);
- read_prop_dword(np, "subsystem-id", &val);
}
/*
* if "ibm,process-mmio" doesn't exist then per-process mmio is
* not supported
*/
val = 0;
- prop = read_prop_dword(np, "ibm,process-mmio", &val);
- if (prop && val == 1)
+ if (!of_property_read_u32(np, "ibm,process-mmio", &val) && val == 1)
afu->pp_psa = true;
else
afu->pp_psa = false;
- if (cxl_verbose) {
- read_prop_dword(np, "ibm,supports-aur", &val);
- read_prop_dword(np, "ibm,supports-csrp", &val);
- read_prop_dword(np, "ibm,supports-prr", &val);
- }
-
- prop = read_prop_dword(np, "ibm,function-error-interrupt", &val);
- if (prop)
+ if (!of_property_read_u32(np, "ibm,function-error-interrupt", &val))
afu->serr_hwirq = val;
pr_devel("AFU handle: %#llx\n", afu->guest->handle);
@@ -334,95 +224,44 @@ err:
int cxl_of_read_adapter_handle(struct cxl *adapter, struct device_node *np)
{
- if (read_handle(np, &adapter->guest->handle))
- return -EINVAL;
- pr_devel("Adapter handle: 0x%.16llx\n", adapter->guest->handle);
-
- return 0;
+ return of_property_read_reg(np, 0, &adapter->guest->handle, NULL);
}
int cxl_of_read_adapter_properties(struct cxl *adapter, struct device_node *np)
{
- int rc, len, naddr, i;
- char *p;
- const __be32 *prop;
+ int rc;
+ const char *p;
u32 val = 0;
/* Properties are read in the same order as listed in PAPR */
- naddr = of_n_addr_cells(np);
-
- if (cxl_verbose) {
- pr_info("Dump of the 'ibm,coherent-platform-facility' node properties:\n");
-
- read_prop_dword(np, "#address-cells", &val);
- read_prop_dword(np, "#size-cells", &val);
-
- prop = of_get_property(np, "compatible", &len);
- i = 0;
- while (i < len) {
- p = (char *) prop + i;
- pr_info("compatible: %s\n", p);
- i += strlen(p) + 1;
- }
- read_prop_string(np, "name");
- read_prop_string(np, "model");
-
- prop = of_get_property(np, "reg", NULL);
- if (prop) {
- pr_info("reg: addr:%#llx size:%#x\n",
- of_read_number(prop, naddr),
- be32_to_cpu(prop[naddr]));
- }
-
- read_prop_string(np, "ibm,loc-code");
- }
-
if ((rc = read_adapter_irq_config(adapter, np)))
return rc;
- if (cxl_verbose) {
- read_prop_string(np, "device_type");
- read_prop_string(np, "ibm,phandle");
- }
-
- prop = read_prop_dword(np, "ibm,caia-version", &val);
- if (prop) {
+ if (!of_property_read_u32(np, "ibm,caia-version", &val)) {
adapter->caia_major = (val & 0xFF00) >> 8;
adapter->caia_minor = val & 0xFF;
}
- prop = read_prop_dword(np, "ibm,psl-revision", &val);
- if (prop)
+ if (!of_property_read_u32(np, "ibm,psl-revision", &val))
adapter->psl_rev = val;
- prop = read_prop_string(np, "status");
- if (prop) {
- adapter->guest->status = kasprintf(GFP_KERNEL, "%s", (char *) prop);
+ if (!of_property_read_string(np, "status", &p)) {
+ adapter->guest->status = kasprintf(GFP_KERNEL, "%s", p);
if (adapter->guest->status == NULL)
return -ENOMEM;
}
- prop = read_prop_dword(np, "vendor-id", &val);
- if (prop)
+ if (!of_property_read_u32(np, "vendor-id", &val))
adapter->guest->vendor = val;
- prop = read_prop_dword(np, "device-id", &val);
- if (prop)
+ if (!of_property_read_u32(np, "device-id", &val))
adapter->guest->device = val;
- if (cxl_verbose) {
- read_prop_dword(np, "ibm,privileged-facility", &val);
- read_prop_dword(np, "revision-id", &val);
- read_prop_dword(np, "class-code", &val);
- }
-
- prop = read_prop_dword(np, "subsystem-vendor-id", &val);
- if (prop)
+ if (!of_property_read_u32(np, "subsystem-vendor-id", &val))
adapter->guest->subsystem_vendor = val;
- prop = read_prop_dword(np, "subsystem-id", &val);
- if (prop)
+ if (!of_property_read_u32(np, "subsystem-id", &val))
adapter->guest->subsystem = val;
if (cxl_verbose)
generated by cgit v1.2.3-70-g09d2 (git 2.48.1) at 2025-06-02 17:28:39 +0000