Update license comments and added SPDX license identifiers

[pciutils.git] / lib / mmio-ports.c

diff --git a/lib/mmio-ports.c b/lib/mmio-ports.c
index ae9c30d7fd6a00205c116d9523b78942af4f671e..f380cb3ec63b2bcb984b3f9071dc50aa65f0aeed 100644 (file)
--- a/lib/mmio-ports.c
+++ b/lib/mmio-ports.c
@@ -3,7 +3,9 @@
  *
  *      Copyright (c) 2022 Pali Rohár <pali@kernel.org>
  *
- *      Can be freely distributed and used under the terms of the GNU GPL.
+ *     Can be freely distributed and used under the terms of the GNU GPL v2+.
+ *
+ *     SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 /*
@@ -124,9 +126,9 @@ writew(unsigned short value, volatile void *addr)
 }
 
 static void
-writel(unsigned long value, volatile void *addr)
+writel(u32 value, volatile void *addr)
 {
-  *(volatile unsigned long *)addr = value;
+  *(volatile u32 *)addr = value;
 }
 
 static unsigned char
@@ -141,10 +143,10 @@ readw(volatile void *addr)
   return *(volatile unsigned short *)addr;
 }
 
-static unsigned long
+static u32
 readl(volatile void *addr)
 {
-  return *(volatile unsigned long *)addr;
+  return *(volatile u32 *)addr;
 }
 
 static int
@@ -225,21 +227,28 @@ conf1_config(struct pci_access *a)
   pci_define_param(a, "mmio-conf1.addrs", "", "Physical addresses of memory mapped Intel conf1 interface"); /* format: 0xaddr1/0xdata1,0xaddr2/0xdata2,... */
 }
 
+static void
+conf1_ext_config(struct pci_access *a)
+{
+  pci_define_param(a, "devmem.path", PCI_PATH_DEVMEM_DEVICE, "Path to the /dev/mem device");
+  pci_define_param(a, "mmio-conf1-ext.addrs", "", "Physical addresses of memory mapped Intel conf1 extended interface"); /* format: 0xaddr1/0xdata1,0xaddr2/0xdata2,... */
+}
+
 static int
-conf1_detect(struct pci_access *a)
+detect(struct pci_access *a, char *addrs_param_name)
 {
-  char *addrs = pci_get_param(a, "mmio-conf1.addrs");
+  char *addrs = pci_get_param(a, addrs_param_name);
   char *devmem = pci_get_param(a, "devmem.path");
 
   if (!*addrs)
     {
-      a->debug("mmio-conf1.addrs was not specified");
+      a->debug("%s was not specified", addrs_param_name);
       return 0;
     }
 
   if (!validate_addrs(addrs))
     {
-      a->debug("mmio-conf1.addrs has invalid address format %s", addrs);
+      a->debug("%s has invalid address format %s", addrs_param_name, addrs);
       return 0;
     }
 
@@ -253,10 +262,32 @@ conf1_detect(struct pci_access *a)
   return 1;
 }
 
+static int
+conf1_detect(struct pci_access *a)
+{
+  return detect(a, "mmio-conf1.addrs");
+}
+
+static int
+conf1_ext_detect(struct pci_access *a)
+{
+  return detect(a, "mmio-conf1-ext.addrs");
+}
+
+static char*
+get_addrs_param_name(struct pci_access *a)
+{
+  if (a->methods->config == conf1_ext_config)
+    return "mmio-conf1-ext.addrs";
+  else
+    return "mmio-conf1.addrs";
+}
+
 static void
 conf1_init(struct pci_access *a)
 {
-  char *addrs = pci_get_param(a, "mmio-conf1.addrs");
+  char *addrs_param_name = get_addrs_param_name(a);
+  char *addrs = pci_get_param(a, addrs_param_name);
   char *devmem = pci_get_param(a, "devmem.path");
 
   pagesize = sysconf(_SC_PAGESIZE);
@@ -264,10 +295,10 @@ conf1_init(struct pci_access *a)
     a->error("Cannot get page size: %s", strerror(errno));
 
   if (!*addrs)
-    a->error("Option mmio-conf1.addrs was not specified.");
+    a->error("Option %s was not specified.", addrs_param_name);
 
   if (!validate_addrs(addrs))
-    a->error("Option mmio-conf1.addrs has invalid address format \"%s\".", addrs);
+    a->error("Option %s has invalid address format \"%s\".", addrs_param_name, addrs);
 
   a->fd = open(devmem, O_RDWR | O_DSYNC); /* O_DSYNC bypass CPU cache for mmap() on Linux */
   if (a->fd < 0)
@@ -288,7 +319,8 @@ conf1_cleanup(struct pci_access *a)
 static void
 conf1_scan(struct pci_access *a)
 {
-  char *addrs = pci_get_param(a, "mmio-conf1.addrs");
+  char *addrs_param_name = get_addrs_param_name(a);
+  char *addrs = pci_get_param(a, addrs_param_name);
   int domain_count = get_domain_count(addrs);
   int domain;
 
@@ -297,13 +329,14 @@ conf1_scan(struct pci_access *a)
 }
 
 static int
-conf1_read(struct pci_dev *d, int pos, byte *buf, int len)
+conf1_ext_read(struct pci_dev *d, int pos, byte *buf, int len)
 {
-  char *addrs = pci_get_param(d->access, "mmio-conf1.addrs");
+  char *addrs_param_name = get_addrs_param_name(d->access);
+  char *addrs = pci_get_param(d->access, addrs_param_name);
   volatile void *addr, *data;
   off_t addr_reg, data_reg;
 
-  if (pos >= 256)
+  if (pos >= 4096)
     return 0;
 
   if (len != 1 && len != 2 && len != 4)
@@ -315,7 +348,7 @@ conf1_read(struct pci_dev *d, int pos, byte *buf, int len)
   if (!mmap_regs(d->access, addr_reg, data_reg, pos&3, &addr, &data))
     return 0;
 
-  writel(0x80000000 | ((d->bus & 0xff) << 16) | (PCI_DEVFN(d->dev, d->func) << 8) | (pos & 0xfc), addr);
+  writel(0x80000000 | ((pos & 0xf00) << 16) | ((d->bus & 0xff) << 16) | (PCI_DEVFN(d->dev, d->func) << 8) | (pos & 0xfc), addr);
   readl(addr); /* write barrier for address */
 
   switch (len)
@@ -335,13 +368,23 @@ conf1_read(struct pci_dev *d, int pos, byte *buf, int len)
 }
 
 static int
-conf1_write(struct pci_dev *d, int pos, byte *buf, int len)
+conf1_read(struct pci_dev *d, int pos, byte *buf, int len)
+{
+  if (pos >= 256)
+    return 0;
+
+  return conf1_ext_read(d, pos, buf, len);
+}
+
+static int
+conf1_ext_write(struct pci_dev *d, int pos, byte *buf, int len)
 {
-  char *addrs = pci_get_param(d->access, "mmio-conf1.addrs");
+  char *addrs_param_name = get_addrs_param_name(d->access);
+  char *addrs = pci_get_param(d->access, addrs_param_name);
   volatile void *addr, *data;
   off_t addr_reg, data_reg;
 
-  if (pos >= 256)
+  if (pos >= 4096)
     return 0;
 
   if (len != 1 && len != 2 && len != 4)
@@ -353,7 +396,7 @@ conf1_write(struct pci_dev *d, int pos, byte *buf, int len)
   if (!mmap_regs(d->access, addr_reg, data_reg, pos&3, &addr, &data))
     return 0;
 
-  writel(0x80000000 | ((d->bus & 0xff) << 16) | (PCI_DEVFN(d->dev, d->func) << 8) | (pos & 0xfc), addr);
+  writel(0x80000000 | ((pos & 0xf00) << 16) | ((d->bus & 0xff) << 16) | (PCI_DEVFN(d->dev, d->func) << 8) | (pos & 0xfc), addr);
   readl(addr); /* write barrier for address */
 
   switch (len)
@@ -383,6 +426,15 @@ conf1_write(struct pci_dev *d, int pos, byte *buf, int len)
   return 1;
 }
 
+static int
+conf1_write(struct pci_dev *d, int pos, byte *buf, int len)
+{
+  if (pos >= 256)
+    return 0;
+
+  return conf1_ext_write(d, pos, buf, len);
+}
+
 struct pci_methods pm_mmio_conf1 = {
   "mmio-conf1",
   "Raw memory mapped I/O port access using Intel conf1 interface",
@@ -398,3 +450,19 @@ struct pci_methods pm_mmio_conf1 = {
   NULL,                                        /* init_dev */
   NULL                                 /* cleanup_dev */
 };
+
+struct pci_methods pm_mmio_conf1_ext = {
+  "mmio-conf1-ext",
+  "Raw memory mapped I/O port access using Intel conf1 extended interface",
+  conf1_ext_config,
+  conf1_ext_detect,
+  conf1_init,
+  conf1_cleanup,
+  conf1_scan,
+  pci_generic_fill_info,
+  conf1_ext_read,
+  conf1_ext_write,
+  NULL,                                        /* read_vpd */
+  NULL,                                        /* init_dev */
+  NULL                                 /* cleanup_dev */
+};