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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 4 of 6] xl: implement pci attach to explicitly defined virtual PCI slot
tools/libxl/libxl.h | 2 +-
tools/libxl/libxl_pci.c | 156 ++++++++++++++++++++++++++++++++++++++--------
tools/libxl/xl_cmdimpl.c | 6 +-
3 files changed, 133 insertions(+), 31 deletions(-)
# HG changeset patch
# User Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>
# Date 1280760240 -3600
# Branch pci-patches-v3
# Node ID 4aea113e2ce2a46c908e62cace4bf9a710ae7c51
# Parent a993021324d0c7d23a16290b7a722c2878506c2e
xl: implement pci attach to explicitly defined virtual PCI slot
Move to state-machine parser for PCI BDF's now that the number of possible
sscanf expressions is sufficiently large to make it worth it. Also implement
parsing of virtual PCI slot numbers.
Signed-off-by: Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>
diff -r a993021324d0 -r 4aea113e2ce2 tools/libxl/libxl.h
--- a/tools/libxl/libxl.h Mon Aug 02 15:41:41 2010 +0100
+++ b/tools/libxl/libxl.h Mon Aug 02 15:44:00 2010 +0100
@@ -521,7 +521,7 @@ int libxl_device_pci_remove(libxl_ctx *c
int libxl_device_pci_shutdown(libxl_ctx *ctx, uint32_t domid);
int libxl_device_pci_list_assigned(libxl_ctx *ctx, libxl_device_pci **list,
uint32_t domid, int *num);
int libxl_device_pci_list_assignable(libxl_ctx *ctx, libxl_device_pci **list,
int *num);
-int libxl_device_pci_parse_bdf(libxl_device_pci *pcidev, const char *str);
+int libxl_device_pci_parse_bdf(libxl_ctx *ctx, libxl_device_pci *pcidev, const
char *str);
/*
* Functions for allowing users of libxl to store private data
diff -r a993021324d0 -r 4aea113e2ce2 tools/libxl/libxl_pci.c
--- a/tools/libxl/libxl_pci.c Mon Aug 02 15:41:41 2010 +0100
+++ b/tools/libxl/libxl_pci.c Mon Aug 02 15:44:00 2010 +0100
@@ -52,41 +52,143 @@ static int pcidev_init(libxl_device_pci
return 0;
}
-int libxl_device_pci_parse_bdf(libxl_device_pci *pcidev, const char *str)
+static int hex_convert(const char *str, unsigned int *val, unsigned int mask)
{
- unsigned dom, bus, dev, func;
- char *p, *buf2;
- int rc;
+ unsigned long ret;
+ char *end;
- if ( NULL == (buf2 = strdup(str)) )
+ ret = strtoul(str, &end, 16);
+ if ( end == str || *end != '\0' )
+ return -1;
+ if ( ret & ~mask )
+ return -1;
+ *val = (unsigned int)ret & mask;
+ return 0;
+}
+
+#define STATE_DOMAIN 0
+#define STATE_BUS 1
+#define STATE_DEV 2
+#define STATE_FUNC 3
+#define STATE_VSLOT 4
+#define STATE_OPTIONS_K 6
+#define STATE_OPTIONS_V 7
+#define STATE_TERMINAL 8
+int libxl_device_pci_parse_bdf(libxl_ctx *ctx, libxl_device_pci *pcidev, const
char *str)
+{
+ unsigned state = STATE_DOMAIN;
+ unsigned dom, bus, dev, func, vslot = 0;
+ char *buf2, *tok, *ptr, *end, *optkey = NULL;
+
+ if ( NULL == (buf2 = ptr = strdup(str)) )
return ERROR_NOMEM;
- p = strtok(buf2, ",");
-
- if ( sscanf(str, PCI_BDF, &dom, &bus, &dev, &func) != 4 ) {
- dom = 0;
- if ( sscanf(str, PCI_BDF_SHORT, &bus, &dev, &func) != 3 ) {
- rc = ERROR_FAIL;
- goto out;
+ for(tok = ptr, end = ptr + strlen(ptr) + 1; ptr < end; ptr++) {
+ switch(state) {
+ case STATE_DOMAIN:
+ if ( *ptr == ':' ) {
+ state = STATE_BUS;
+ *ptr = '\0';
+ if ( hex_convert(tok, &dom, 0xffff) )
+ goto parse_error;
+ tok = ptr + 1;
+ }
+ break;
+ case STATE_BUS:
+ if ( *ptr == ':' ) {
+ state = STATE_DEV;
+ *ptr = '\0';
+ if ( hex_convert(tok, &bus, 0xff) )
+ goto parse_error;
+ tok = ptr + 1;
+ }else if ( *ptr == '.' ) {
+ state = STATE_FUNC;
+ *ptr = '\0';
+ if ( dom & ~0xff )
+ goto parse_error;
+ bus = dom;
+ dom = 0;
+ if ( hex_convert(tok, &dev, 0xff) )
+ goto parse_error;
+ tok = ptr + 1;
+ }
+ break;
+ case STATE_DEV:
+ if ( *ptr == '.' ) {
+ state = STATE_FUNC;
+ *ptr = '\0';
+ if ( hex_convert(tok, &dev, 0xff) )
+ goto parse_error;
+ tok = ptr + 1;
+ }
+ break;
+ case STATE_FUNC:
+ if ( *ptr == '\0' || *ptr == '@' || *ptr == ',' ) {
+ switch( *ptr ) {
+ case '\0':
+ state = STATE_TERMINAL;
+ break;
+ case '@':
+ state = STATE_VSLOT;
+ break;
+ case ',':
+ state = STATE_OPTIONS_K;
+ break;
+ }
+ *ptr = '\0';
+ if ( hex_convert(tok, &func, 0x7) )
+ goto parse_error;
+ tok = ptr + 1;
+ }
+ break;
+ case STATE_VSLOT:
+ if ( *ptr == '\0' || *ptr == ',' ) {
+ state = ( *ptr == ',' ) ? STATE_OPTIONS_K : STATE_TERMINAL;
+ *ptr = '\0';
+ if ( hex_convert(tok, &vslot, 0xff) )
+ goto parse_error;
+ tok = ptr + 1;
+ }
+ break;
+ case STATE_OPTIONS_K:
+ if ( *ptr == '=' ) {
+ state = STATE_OPTIONS_V;
+ *ptr = '\0';
+ optkey = tok;
+ tok = ptr + 1;
+ }
+ break;
+ case STATE_OPTIONS_V:
+ if ( *ptr == ',' || *ptr == '\0' ) {
+ state = (*ptr == ',') ? STATE_OPTIONS_K : STATE_TERMINAL;
+ *ptr = '\0';
+ if ( !strcmp(optkey, "msitranslate") ) {
+ pcidev->msitranslate = atoi(tok);
+ }else if ( !strcmp(optkey, "power_mgmt") ) {
+ pcidev->power_mgmt = atoi(tok);
+ }else{
+ XL_LOG(ctx, XL_LOG_WARNING,
+ "Unknown PCI BDF option: %s", optkey);
+ }
+ tok = ptr + 1;
+ }
+ default:
+ break;
}
}
- rc = pcidev_init(pcidev, dom, bus, dev, func, 0);
+ free(buf2);
- while ((p = strtok(NULL, ",=")) != NULL) {
- while (*p == ' ')
- p++;
- if (!strcmp(p, "msitranslate")) {
- p = strtok(NULL, ",=");
- pcidev->msitranslate = atoi(p);
- } else if (!strcmp(p, "power_mgmt")) {
- p = strtok(NULL, ",=");
- pcidev->power_mgmt = atoi(p);
- }
- }
-out:
- free(buf2);
- return rc;
+ if ( tok != ptr || state != STATE_TERMINAL )
+ goto parse_error;
+
+ pcidev_init(pcidev, dom, bus, dev, func, vslot << 3);
+
+ return 0;
+
+parse_error:
+ printf("parse error: %s\n", str);
+ return ERROR_INVAL;
}
static int libxl_create_pci_backend(libxl_ctx *ctx, uint32_t domid,
libxl_device_pci *pcidev, int num)
diff -r a993021324d0 -r 4aea113e2ce2 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c Mon Aug 02 15:41:41 2010 +0100
+++ b/tools/libxl/xl_cmdimpl.c Mon Aug 02 15:44:00 2010 +0100
@@ -955,7 +955,7 @@ skip_vfb:
pcidev->msitranslate = pci_msitranslate;
pcidev->power_mgmt = pci_power_mgmt;
- if (!libxl_device_pci_parse_bdf(pcidev, buf))
+ if (!libxl_device_pci_parse_bdf(&ctx, pcidev, buf))
d_config->num_pcidevs++;
}
}
@@ -1979,7 +1979,7 @@ void pcidetach(char *dom, char *bdf)
find_domain(dom);
memset(&pcidev, 0x00, sizeof(pcidev));
- if (libxl_device_pci_parse_bdf(&pcidev, bdf)) {
+ if (libxl_device_pci_parse_bdf(&ctx, &pcidev, bdf)) {
fprintf(stderr, "pci-detach: malformed BDF specification \"%s\"\n",
bdf);
exit(2);
}
@@ -2019,7 +2019,7 @@ void pciattach(char *dom, char *bdf, cha
find_domain(dom);
memset(&pcidev, 0x00, sizeof(pcidev));
- if (libxl_device_pci_parse_bdf(&pcidev, bdf)) {
+ if (libxl_device_pci_parse_bdf(&ctx, &pcidev, bdf)) {
fprintf(stderr, "pci-attach: malformed BDF specification \"%s\"\n",
bdf);
exit(2);
}
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