| Message ID | 1381914195-26681-2-git-send-email-colin.king@canonical.com |
|---|---|
| State | Accepted |
| Headers | show |
On Wed, Oct 16, 2013 at 5:03 PM, Colin King <colin.king@canonical.com> wrote: > From: Colin Ian King <colin.king@canonical.com> > > We can simplify the ASPM test by removing the need to run lspci and parse > the output. Instead, just scan /sys/bus/pci/devices and read the PCI > config from the relevant config file. > > While we are at it, also remove the redundant aspm parameter from > facp_get_aspm_control as we don't do anything with it. > > Signed-off-by: Colin Ian King <colin.king@canonical.com> > --- > src/pci/aspm/aspm.c | 160 ++++++++++++++++++++-------------------------------- > 1 file changed, 60 insertions(+), 100 deletions(-) > > diff --git a/src/pci/aspm/aspm.c b/src/pci/aspm/aspm.c > index be8ee5b..835ac7f 100644 > --- a/src/pci/aspm/aspm.c > +++ b/src/pci/aspm/aspm.c > @@ -18,16 +18,21 @@ > */ > #include <stdlib.h> > #include <stdio.h> > +#include <stdint.h> > #include <errno.h> > #include <sys/types.h> > #include <sys/stat.h> > #include <sys/wait.h> > +#include <dirent.h> > #include <unistd.h> > #include <string.h> > #include <fcntl.h> > #include <limits.h> > +#include <inttypes.h> > #include "fwts.h" > > +#define PCI_DEV_PATH "/sys/bus/pci/devices" > + > /* PCI Confiiguration Space for Type 0 & 1 */ > #define FWTS_PCI_HEADER_TYPE 0x0E > #define FWTS_PCI_CAPABILITIES_POINTER 0x34 > @@ -48,17 +53,16 @@ > #define FWTS_PCIE_ASPM_CONTROL_L1_FIELD 0x0002 > #define FWTS_PCIE_ASPM_CONTROL_FIELD (FWTS_PCIE_ASPM_CONTROL_L0_FIELD | FWTS_PCIE_ASPM_CONTROL_L1_FIELD) > > - > struct pci_device { > uint8_t segment; > uint8_t bus; > uint8_t dev; > uint8_t func; > uint8_t config[256]; > - struct pci_device *next; > }; > > -/* PCI Express Capability Structure is defined in Section 7.8 > +/* > + * PCI Express Capability Structure is defined in Section 7.8 > * of PCI Express®i Base Specification Revision 2.0 > */ > typedef struct { > @@ -88,7 +92,7 @@ typedef struct { > uint16_t slot_status2; > } __attribute__ ((packed)) pcie_capability; > > -static int facp_get_aspm_control(fwts_framework *fw, int *aspm) > +static int facp_get_aspm_control(fwts_framework *fw) > { > fwts_acpi_table_info *table; > fwts_acpi_table_fadt *fadt; > @@ -99,10 +103,8 @@ static int facp_get_aspm_control(fwts_framework *fw, int *aspm) > fadt = (fwts_acpi_table_fadt*)table->data; > > if ((fadt->iapc_boot_arch & FWTS_FACP_IAPC_BOOT_ARCH_PCIE_ASPM_CONTROLS) == 0) { > - *aspm = 1; > fwts_log_info(fw, "PCIe ASPM is controlled by Linux kernel."); > } else { > - *aspm = 0; > fwts_log_info(fw, "PCIe ASPM is not controlled by Linux kernel."); > fwts_advice(fw, > "BIOS reports that Linux kernel should not modify ASPM " > @@ -211,126 +213,84 @@ static int pcie_compare_rp_dev_aspm_registers(fwts_framework *fw, > return ret; > } > > -static void pci_device_list_free(struct pci_device *head) > -{ > - struct pci_device *next; > - > - while (head) { > - next = head->next; > - free(head); > - head = next; > - } > -} > - > static int pcie_check_aspm_registers(fwts_framework *fw) > { > - fwts_list *lspci_output; > - fwts_list_link *item; > - struct pci_device *head = NULL, *cur = NULL, *device = NULL; > - char command[PATH_MAX]; > - int ret = FWTS_OK; > - int status; > + DIR *dirp; > + struct dirent *entry; > + fwts_list dev_list; > + fwts_list_link *lcur, *ltarget; > > - snprintf(command, sizeof(command), "%s", fw->lspci); > + fwts_list_init(&dev_list); > > - if (fwts_pipe_exec(command, &lspci_output, &status) != FWTS_OK) { > - fwts_log_warning(fw, "Could not execute %s.", command); > + if ((dirp = opendir(PCI_DEV_PATH)) == NULL) { > + fwts_log_warning(fw, "Could not open %s.", PCI_DEV_PATH); > return FWTS_ERROR; > } > - if (lspci_output == NULL) { > - fwts_log_warning(fw, "Output from lspci was empty."); > - return FWTS_ERROR; > - } > - > - /* Get the list of pci devices and their configuration */ > - fwts_list_foreach(item, lspci_output) { > - char *line = fwts_text_list_text(item); > - char *pEnd; > - > - device = (struct pci_device *) calloc(1, sizeof(*device)); > - if (device == NULL) { > - pci_device_list_free(head); > - fwts_text_list_free(lspci_output); > - return FWTS_ERROR; > - } > - > - device->bus = strtol(line, &pEnd, 16); > - device->dev = strtol(pEnd + 1, &pEnd, 16); > - device->func = strtol(pEnd + 1, &pEnd, 16); > - > - if (head == NULL) > - head = device; > - else > - cur->next = device; > - > - cur = device; > - } > - fwts_text_list_free(lspci_output); > - > - for (cur = head; cur; cur = cur->next) { > - int reg_loc = 0, reg_val = 0; > - int i; > - int status; > - > - snprintf(command, sizeof(command), "%s -s %02X:%02X.%02X -xxx", > - fw->lspci, cur->bus, cur->dev, cur->func); > - if (fwts_pipe_exec(command, &lspci_output, &status) != FWTS_OK) { > - fwts_log_warning(fw, "Could not execute %s", command); > - pci_device_list_free(head); > - return FWTS_ERROR; > - } > - if (lspci_output == NULL) { > - pci_device_list_free(head); > - return FWTS_ERROR; > - } > - > - fwts_list_foreach(item, lspci_output) { > - char *line = fwts_text_list_text(item); > - char *pEnd; > + while ((entry = readdir(dirp)) != NULL) { > + uint8_t bus, dev, func; > + > + if (entry->d_name[0] == '.') > + continue; > + > + if (sscanf(entry->d_name, "%*x:%" SCNx8 ":%" SCNx8 ".%" SCNx8, &bus, &dev, &func) == 3) { > + int fd; > + char path[PATH_MAX]; > + struct pci_device *device; > + > + device = (struct pci_device *)calloc(1, sizeof(struct pci_device)); > + if (device == NULL) { > + fwts_list_free_items(&dev_list, free); > + closedir(dirp); > + return FWTS_ERROR; > + } > + device->bus = bus; > + device->dev = dev; > + device->func = func; > + > + snprintf(path, sizeof(path), PCI_DEV_PATH "/%s/config", entry->d_name); > + if ((fd = open(path, O_RDONLY)) < 0) { > + fwts_log_warning(fw, "Could not open config from PCI device %s\n", entry->d_name); > + free(device); > + continue; > + } > > - if (strlen(line) >= 3 && line[3] == ' ') { > - reg_val = strtol(line, &pEnd, 16); > - for (i = 0; reg_loc < 256 && i < 16; i++) { > - reg_val = strtol(pEnd + 1, &pEnd, 16); > - cur->config[reg_loc] = reg_val; > - reg_loc++; > - } > + if (read(fd, device->config, sizeof(device->config)) < 0) { > + fwts_log_warning(fw, "Could not read config from PCI device %s\n", entry->d_name); > + free(device); > + close(fd); > + continue; > } > + close(fd); > + fwts_list_append(&dev_list, device); > } > - fwts_text_list_free(lspci_output); > } > + closedir(dirp); > > /* Check aspm registers from the list of pci devices */ > - for (cur = head; cur; cur = cur->next) { > - struct pci_device *target; > + for (lcur = dev_list.head; lcur; lcur = lcur->next) { > + struct pci_device *target, *cur = (struct pci_device *)lcur->data; > > /* Find PCI Bridge (PCIE Root Port) and the attached device */ > if (cur->config[FWTS_PCI_HEADER_TYPE] & 0x01) { > - target = head; > - while (target != NULL) { > - if (target->bus == cur->config[FWTS_PCI_SECONDARD_BUS_NUMBER]) > + for (ltarget = dev_list.head; ltarget; ltarget = ltarget->next) { > + target = (struct pci_device *)ltarget->data; > + if (target->bus == cur->config[FWTS_PCI_SECONDARD_BUS_NUMBER]) { > + pcie_compare_rp_dev_aspm_registers(fw, cur, target); > break; > - target = target->next; > - } > - if (target == NULL) { > - continue; > + } > } > - > - pcie_compare_rp_dev_aspm_registers(fw, cur, target); > } > } > + fwts_list_free_items(&dev_list, free); > > - pci_device_list_free(head); > - > - return ret; > + return FWTS_OK; > } > > static int aspm_check_configuration(fwts_framework *fw) > { > int ret; > - int aspm_facp; > > - ret = facp_get_aspm_control(fw, &aspm_facp); > + ret = facp_get_aspm_control(fw); > if (ret == FWTS_ERROR) > fwts_skipped(fw, "No valid FACP information present: cannot test ASPM."); > > -- > 1.8.3.2 > Acked-by: Keng-Yu Lin <kengyu@canonical.com>
diff --git a/src/pci/aspm/aspm.c b/src/pci/aspm/aspm.c index be8ee5b..835ac7f 100644 --- a/src/pci/aspm/aspm.c +++ b/src/pci/aspm/aspm.c @@ -18,16 +18,21 @@ */ #include <stdlib.h> #include <stdio.h> +#include <stdint.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/wait.h> +#include <dirent.h> #include <unistd.h> #include <string.h> #include <fcntl.h> #include <limits.h> +#include <inttypes.h> #include "fwts.h" +#define PCI_DEV_PATH "/sys/bus/pci/devices" + /* PCI Confiiguration Space for Type 0 & 1 */ #define FWTS_PCI_HEADER_TYPE 0x0E #define FWTS_PCI_CAPABILITIES_POINTER 0x34 @@ -48,17 +53,16 @@ #define FWTS_PCIE_ASPM_CONTROL_L1_FIELD 0x0002 #define FWTS_PCIE_ASPM_CONTROL_FIELD (FWTS_PCIE_ASPM_CONTROL_L0_FIELD | FWTS_PCIE_ASPM_CONTROL_L1_FIELD) - struct pci_device { uint8_t segment; uint8_t bus; uint8_t dev; uint8_t func; uint8_t config[256]; - struct pci_device *next; }; -/* PCI Express Capability Structure is defined in Section 7.8 +/* + * PCI Express Capability Structure is defined in Section 7.8 * of PCI Express®i Base Specification Revision 2.0 */ typedef struct { @@ -88,7 +92,7 @@ typedef struct { uint16_t slot_status2; } __attribute__ ((packed)) pcie_capability; -static int facp_get_aspm_control(fwts_framework *fw, int *aspm) +static int facp_get_aspm_control(fwts_framework *fw) { fwts_acpi_table_info *table; fwts_acpi_table_fadt *fadt; @@ -99,10 +103,8 @@ static int facp_get_aspm_control(fwts_framework *fw, int *aspm) fadt = (fwts_acpi_table_fadt*)table->data; if ((fadt->iapc_boot_arch & FWTS_FACP_IAPC_BOOT_ARCH_PCIE_ASPM_CONTROLS) == 0) { - *aspm = 1; fwts_log_info(fw, "PCIe ASPM is controlled by Linux kernel."); } else { - *aspm = 0; fwts_log_info(fw, "PCIe ASPM is not controlled by Linux kernel."); fwts_advice(fw, "BIOS reports that Linux kernel should not modify ASPM " @@ -211,126 +213,84 @@ static int pcie_compare_rp_dev_aspm_registers(fwts_framework *fw, return ret; } -static void pci_device_list_free(struct pci_device *head) -{ - struct pci_device *next; - - while (head) { - next = head->next; - free(head); - head = next; - } -} - static int pcie_check_aspm_registers(fwts_framework *fw) { - fwts_list *lspci_output; - fwts_list_link *item; - struct pci_device *head = NULL, *cur = NULL, *device = NULL; - char command[PATH_MAX]; - int ret = FWTS_OK; - int status; + DIR *dirp; + struct dirent *entry; + fwts_list dev_list; + fwts_list_link *lcur, *ltarget; - snprintf(command, sizeof(command), "%s", fw->lspci); + fwts_list_init(&dev_list); - if (fwts_pipe_exec(command, &lspci_output, &status) != FWTS_OK) { - fwts_log_warning(fw, "Could not execute %s.", command); + if ((dirp = opendir(PCI_DEV_PATH)) == NULL) { + fwts_log_warning(fw, "Could not open %s.", PCI_DEV_PATH); return FWTS_ERROR; } - if (lspci_output == NULL) { - fwts_log_warning(fw, "Output from lspci was empty."); - return FWTS_ERROR; - } - - /* Get the list of pci devices and their configuration */ - fwts_list_foreach(item, lspci_output) { - char *line = fwts_text_list_text(item); - char *pEnd; - - device = (struct pci_device *) calloc(1, sizeof(*device)); - if (device == NULL) { - pci_device_list_free(head); - fwts_text_list_free(lspci_output); - return FWTS_ERROR; - } - - device->bus = strtol(line, &pEnd, 16); - device->dev = strtol(pEnd + 1, &pEnd, 16); - device->func = strtol(pEnd + 1, &pEnd, 16); - - if (head == NULL) - head = device; - else - cur->next = device; - - cur = device; - } - fwts_text_list_free(lspci_output); - - for (cur = head; cur; cur = cur->next) { - int reg_loc = 0, reg_val = 0; - int i; - int status; - - snprintf(command, sizeof(command), "%s -s %02X:%02X.%02X -xxx", - fw->lspci, cur->bus, cur->dev, cur->func); - if (fwts_pipe_exec(command, &lspci_output, &status) != FWTS_OK) { - fwts_log_warning(fw, "Could not execute %s", command); - pci_device_list_free(head); - return FWTS_ERROR; - } - if (lspci_output == NULL) { - pci_device_list_free(head); - return FWTS_ERROR; - } - - fwts_list_foreach(item, lspci_output) { - char *line = fwts_text_list_text(item); - char *pEnd; + while ((entry = readdir(dirp)) != NULL) { + uint8_t bus, dev, func; + + if (entry->d_name[0] == '.') + continue; + + if (sscanf(entry->d_name, "%*x:%" SCNx8 ":%" SCNx8 ".%" SCNx8, &bus, &dev, &func) == 3) { + int fd; + char path[PATH_MAX]; + struct pci_device *device; + + device = (struct pci_device *)calloc(1, sizeof(struct pci_device)); + if (device == NULL) { + fwts_list_free_items(&dev_list, free); + closedir(dirp); + return FWTS_ERROR; + } + device->bus = bus; + device->dev = dev; + device->func = func; + + snprintf(path, sizeof(path), PCI_DEV_PATH "/%s/config", entry->d_name); + if ((fd = open(path, O_RDONLY)) < 0) { + fwts_log_warning(fw, "Could not open config from PCI device %s\n", entry->d_name); + free(device); + continue; + } - if (strlen(line) >= 3 && line[3] == ' ') { - reg_val = strtol(line, &pEnd, 16); - for (i = 0; reg_loc < 256 && i < 16; i++) { - reg_val = strtol(pEnd + 1, &pEnd, 16); - cur->config[reg_loc] = reg_val; - reg_loc++; - } + if (read(fd, device->config, sizeof(device->config)) < 0) { + fwts_log_warning(fw, "Could not read config from PCI device %s\n", entry->d_name); + free(device); + close(fd); + continue; } + close(fd); + fwts_list_append(&dev_list, device); } - fwts_text_list_free(lspci_output); } + closedir(dirp); /* Check aspm registers from the list of pci devices */ - for (cur = head; cur; cur = cur->next) { - struct pci_device *target; + for (lcur = dev_list.head; lcur; lcur = lcur->next) { + struct pci_device *target, *cur = (struct pci_device *)lcur->data; /* Find PCI Bridge (PCIE Root Port) and the attached device */ if (cur->config[FWTS_PCI_HEADER_TYPE] & 0x01) { - target = head; - while (target != NULL) { - if (target->bus == cur->config[FWTS_PCI_SECONDARD_BUS_NUMBER]) + for (ltarget = dev_list.head; ltarget; ltarget = ltarget->next) { + target = (struct pci_device *)ltarget->data; + if (target->bus == cur->config[FWTS_PCI_SECONDARD_BUS_NUMBER]) { + pcie_compare_rp_dev_aspm_registers(fw, cur, target); break; - target = target->next; - } - if (target == NULL) { - continue; + } } - - pcie_compare_rp_dev_aspm_registers(fw, cur, target); } } + fwts_list_free_items(&dev_list, free); - pci_device_list_free(head); - - return ret; + return FWTS_OK; } static int aspm_check_configuration(fwts_framework *fw) { int ret; - int aspm_facp; - ret = facp_get_aspm_control(fw, &aspm_facp); + ret = facp_get_aspm_control(fw); if (ret == FWTS_ERROR) fwts_skipped(fw, "No valid FACP information present: cannot test ASPM.");