512 lines
12 KiB
C
512 lines
12 KiB
C
|
/*
|
||
|
|
* Copyright 2015 IBM Corp.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the License, or (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/slab.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)
|
||
|
|
{
|
||
|
|
int i, len, entry_size, naddr, nsize, type;
|
||
|
|
u64 addr, size;
|
||
|
|
const __be32 *prop;
|
||
|
|
|
||
|
|
naddr = of_n_addr_cells(np);
|
||
|
|
nsize = of_n_size_cells(np);
|
||
|
|
|
||
|
|
prop = of_get_property(np, prop_name, &len);
|
||
|
|
if (prop) {
|
||
|
|
entry_size = naddr + nsize;
|
||
|
|
for (i = 0; i < (len / 4); i += entry_size, prop += entry_size) {
|
||
|
|
type = be32_to_cpu(prop[0]);
|
||
|
|
addr = of_read_number(prop, naddr);
|
||
|
|
size = of_read_number(&prop[naddr], nsize);
|
||
|
|
switch (type) {
|
||
|
|
case 0: /* unit address */
|
||
|
|
afu->guest->handle = addr;
|
||
|
|
break;
|
||
|
|
case 1: /* p2 area */
|
||
|
|
afu->guest->p2n_phys += addr;
|
||
|
|
afu->guest->p2n_size = size;
|
||
|
|
break;
|
||
|
|
case 2: /* problem state area */
|
||
|
|
afu->psn_phys += addr;
|
||
|
|
afu->adapter->ps_size = size;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
pr_err("Invalid address type %d found in %s property of AFU\n",
|
||
|
|
type, prop_name);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
if (cxl_verbose)
|
||
|
|
pr_info("%s: %#x %#llx (size %#llx)\n",
|
||
|
|
prop_name, type, addr, size);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int read_vpd(struct cxl *adapter, struct cxl_afu *afu)
|
||
|
|
{
|
||
|
|
char vpd[256];
|
||
|
|
int rc;
|
||
|
|
size_t len = sizeof(vpd);
|
||
|
|
|
||
|
|
memset(vpd, 0, len);
|
||
|
|
|
||
|
|
if (adapter)
|
||
|
|
rc = cxl_guest_read_adapter_vpd(adapter, vpd, len);
|
||
|
|
else
|
||
|
|
rc = cxl_guest_read_afu_vpd(afu, vpd, len);
|
||
|
|
|
||
|
|
if (rc > 0) {
|
||
|
|
cxl_dump_debug_buffer(vpd, rc);
|
||
|
|
rc = 0;
|
||
|
|
}
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *np)
|
||
|
|
{
|
||
|
|
int i, len, rc;
|
||
|
|
char *p;
|
||
|
|
const __be32 *prop;
|
||
|
|
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;
|
||
|
|
|
||
|
|
rc = read_phys_addr(np, "assigned-addresses", afu);
|
||
|
|
if (rc)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
if (afu->psn_phys == 0)
|
||
|
|
afu->psa = false;
|
||
|
|
else
|
||
|
|
afu->psa = true;
|
||
|
|
|
||
|
|
if (cxl_verbose) {
|
||
|
|
read_prop_string(np, "ibm,loc-code");
|
||
|
|
read_prop_string(np, "device_type");
|
||
|
|
}
|
||
|
|
|
||
|
|
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");
|
||
|
|
read_vpd(NULL, afu);
|
||
|
|
}
|
||
|
|
|
||
|
|
read_prop_dword(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) {
|
||
|
|
/* One extra interrupt for the PSL interrupt is already
|
||
|
|
* included. Remove it now to keep only AFU interrupts and
|
||
|
|
* match the native case.
|
||
|
|
*/
|
||
|
|
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);
|
||
|
|
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);
|
||
|
|
afu->crs_offset = 0;
|
||
|
|
|
||
|
|
read_prop_dword(np, "ibm,#config-records", &afu->crs_num);
|
||
|
|
|
||
|
|
if (cxl_verbose) {
|
||
|
|
for (i = 0; i < afu->crs_num; i++) {
|
||
|
|
rc = cxl_ops->afu_cr_read16(afu, i, PCI_DEVICE_ID,
|
||
|
|
&device_id);
|
||
|
|
if (!rc)
|
||
|
|
pr_info("record %d - device-id: %#x\n",
|
||
|
|
i, device_id);
|
||
|
|
rc = cxl_ops->afu_cr_read16(afu, i, PCI_VENDOR_ID,
|
||
|
|
&vendor_id);
|
||
|
|
if (!rc)
|
||
|
|
pr_info("record %d - vendor-id: %#x\n",
|
||
|
|
i, vendor_id);
|
||
|
|
rc = cxl_ops->afu_cr_read32(afu, i, PCI_CLASS_REVISION,
|
||
|
|
&class_code);
|
||
|
|
if (!rc) {
|
||
|
|
class_code >>= 8;
|
||
|
|
pr_info("record %d - class-code: %#x\n",
|
||
|
|
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)
|
||
|
|
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)
|
||
|
|
afu->serr_hwirq = val;
|
||
|
|
|
||
|
|
pr_devel("AFU handle: %#llx\n", afu->guest->handle);
|
||
|
|
pr_devel("p2n_phys: %#llx (size %#llx)\n",
|
||
|
|
afu->guest->p2n_phys, afu->guest->p2n_size);
|
||
|
|
pr_devel("psn_phys: %#llx (size %#llx)\n",
|
||
|
|
afu->psn_phys, afu->adapter->ps_size);
|
||
|
|
pr_devel("Max number of processes virtualised=%i\n",
|
||
|
|
afu->max_procs_virtualised);
|
||
|
|
pr_devel("Per-process irqs min=%i, max=%i\n", afu->pp_irqs,
|
||
|
|
afu->irqs_max);
|
||
|
|
pr_devel("Slice error interrupt=%#lx\n", afu->serr_hwirq);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int read_adapter_irq_config(struct cxl *adapter, struct device_node *np)
|
||
|
|
{
|
||
|
|
const __be32 *ranges;
|
||
|
|
int len, nranges, i;
|
||
|
|
struct irq_avail *cur;
|
||
|
|
|
||
|
|
ranges = of_get_property(np, "interrupt-ranges", &len);
|
||
|
|
if (ranges == NULL || len < (2 * sizeof(int)))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* encoded array of two cells per entry, each cell encoded as
|
||
|
|
* with encode-int
|
||
|
|
*/
|
||
|
|
nranges = len / (2 * sizeof(int));
|
||
|
|
if (nranges == 0 || (nranges * 2 * sizeof(int)) != len)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
adapter->guest->irq_avail = kzalloc(nranges * sizeof(struct irq_avail),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (adapter->guest->irq_avail == NULL)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
adapter->guest->irq_base_offset = be32_to_cpu(ranges[0]);
|
||
|
|
for (i = 0; i < nranges; i++) {
|
||
|
|
cur = &adapter->guest->irq_avail[i];
|
||
|
|
cur->offset = be32_to_cpu(ranges[i * 2]);
|
||
|
|
cur->range = be32_to_cpu(ranges[i * 2 + 1]);
|
||
|
|
cur->bitmap = kcalloc(BITS_TO_LONGS(cur->range),
|
||
|
|
sizeof(*cur->bitmap), GFP_KERNEL);
|
||
|
|
if (cur->bitmap == NULL)
|
||
|
|
goto err;
|
||
|
|
if (cur->offset < adapter->guest->irq_base_offset)
|
||
|
|
adapter->guest->irq_base_offset = cur->offset;
|
||
|
|
if (cxl_verbose)
|
||
|
|
pr_info("available IRQ range: %#lx-%#lx (%lu)\n",
|
||
|
|
cur->offset, cur->offset + cur->range - 1,
|
||
|
|
cur->range);
|
||
|
|
}
|
||
|
|
adapter->guest->irq_nranges = nranges;
|
||
|
|
spin_lock_init(&adapter->guest->irq_alloc_lock);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
for (i--; i >= 0; i--) {
|
||
|
|
cur = &adapter->guest->irq_avail[i];
|
||
|
|
kfree(cur->bitmap);
|
||
|
|
}
|
||
|
|
kfree(adapter->guest->irq_avail);
|
||
|
|
adapter->guest->irq_avail = NULL;
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
int cxl_of_read_adapter_properties(struct cxl *adapter, struct device_node *np)
|
||
|
|
{
|
||
|
|
int rc, len, naddr, i;
|
||
|
|
char *p;
|
||
|
|
const __be32 *prop;
|
||
|
|
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) {
|
||
|
|
adapter->caia_major = (val & 0xFF00) >> 8;
|
||
|
|
adapter->caia_minor = val & 0xFF;
|
||
|
|
}
|
||
|
|
|
||
|
|
prop = read_prop_dword(np, "ibm,psl-revision", &val);
|
||
|
|
if (prop)
|
||
|
|
adapter->psl_rev = val;
|
||
|
|
|
||
|
|
prop = read_prop_string(np, "status");
|
||
|
|
if (prop) {
|
||
|
|
adapter->guest->status = kasprintf(GFP_KERNEL, "%s", (char *) prop);
|
||
|
|
if (adapter->guest->status == NULL)
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
prop = read_prop_dword(np, "vendor-id", &val);
|
||
|
|
if (prop)
|
||
|
|
adapter->guest->vendor = val;
|
||
|
|
|
||
|
|
prop = read_prop_dword(np, "device-id", &val);
|
||
|
|
if (prop)
|
||
|
|
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)
|
||
|
|
adapter->guest->subsystem_vendor = val;
|
||
|
|
|
||
|
|
prop = read_prop_dword(np, "subsystem-id", &val);
|
||
|
|
if (prop)
|
||
|
|
adapter->guest->subsystem = val;
|
||
|
|
|
||
|
|
if (cxl_verbose)
|
||
|
|
read_vpd(adapter, NULL);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int cxl_of_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct cxl *adapter;
|
||
|
|
int afu;
|
||
|
|
|
||
|
|
adapter = dev_get_drvdata(&pdev->dev);
|
||
|
|
for (afu = 0; afu < adapter->slices; afu++)
|
||
|
|
cxl_guest_remove_afu(adapter->afu[afu]);
|
||
|
|
|
||
|
|
cxl_guest_remove_adapter(adapter);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cxl_of_shutdown(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
cxl_of_remove(pdev);
|
||
|
|
}
|
||
|
|
|
||
|
|
int cxl_of_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct device_node *np = NULL;
|
||
|
|
struct device_node *afu_np = NULL;
|
||
|
|
struct cxl *adapter = NULL;
|
||
|
|
int ret;
|
||
|
|
int slice = 0, slice_ok = 0;
|
||
|
|
|
||
|
|
pr_devel("in %s\n", __func__);
|
||
|
|
|
||
|
|
np = pdev->dev.of_node;
|
||
|
|
if (np == NULL)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
/* init adapter */
|
||
|
|
adapter = cxl_guest_init_adapter(np, pdev);
|
||
|
|
if (IS_ERR(adapter)) {
|
||
|
|
dev_err(&pdev->dev, "guest_init_adapter failed: %li\n", PTR_ERR(adapter));
|
||
|
|
return PTR_ERR(adapter);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* init afu */
|
||
|
|
for_each_child_of_node(np, afu_np) {
|
||
|
|
if ((ret = cxl_guest_init_afu(adapter, slice, afu_np)))
|
||
|
|
dev_err(&pdev->dev, "AFU %i failed to initialise: %i\n",
|
||
|
|
slice, ret);
|
||
|
|
else
|
||
|
|
slice_ok++;
|
||
|
|
slice++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (slice_ok == 0) {
|
||
|
|
dev_info(&pdev->dev, "No active AFU");
|
||
|
|
adapter->slices = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id cxl_of_match[] = {
|
||
|
|
{ .compatible = "ibm,coherent-platform-facility",},
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, cxl_of_match);
|
||
|
|
|
||
|
|
struct platform_driver cxl_of_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "cxl_of",
|
||
|
|
.of_match_table = cxl_of_match,
|
||
|
|
.owner = THIS_MODULE
|
||
|
|
},
|
||
|
|
.probe = cxl_of_probe,
|
||
|
|
.remove = cxl_of_remove,
|
||
|
|
.shutdown = cxl_of_shutdown,
|
||
|
|
};
|