#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ #ifdef CONFIG_PROC_FS #include #include #include #include #include #include #include #include #include #include #include #include #include "mpc.h" #include "mpoa_caches.h" /* * mpoa_proc.c: Implementation MPOA client's proc * file system statistics */ #if 1 #define dprintk(format, args...) \ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */ #else #define dprintk(format, args...) \ do { if (0) \ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\ } while (0) #endif #if 0 #define ddprintk(format, args...) \ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */ #else #define ddprintk(format, args...) \ do { if (0) \ printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\ } while (0) #endif #define STAT_FILE_NAME "mpc" /* Our statistic file's name */ extern struct mpoa_client *mpcs; extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */ static int proc_mpc_open(struct inode *inode, struct file *file); static ssize_t proc_mpc_write(struct file *file, const char __user *buff, size_t nbytes, loff_t *ppos); static int parse_qos(const char *buff); /* * Define allowed FILE OPERATIONS */ static const struct file_operations mpc_file_operations = { .owner = THIS_MODULE, .open = proc_mpc_open, .read = seq_read, .llseek = seq_lseek, .write = proc_mpc_write, .release = seq_release, }; /* * Returns the state of an ingress cache entry as a string */ static const char *ingress_state_string(int state) { switch (state) { case INGRESS_RESOLVING: return "resolving "; case INGRESS_RESOLVED: return "resolved "; case INGRESS_INVALID: return "invalid "; case INGRESS_REFRESHING: return "refreshing "; } return ""; } /* * Returns the state of an egress cache entry as a string */ static const char *egress_state_string(int state) { switch (state) { case EGRESS_RESOLVED: return "resolved "; case EGRESS_PURGE: return "purge "; case EGRESS_INVALID: return "invalid "; } return ""; } /* * FIXME: mpcs (and per-mpc lists) have no locking whatsoever. */ static void *mpc_start(struct seq_file *m, loff_t *pos) { loff_t l = *pos; struct mpoa_client *mpc; if (!l--) return SEQ_START_TOKEN; for (mpc = mpcs; mpc; mpc = mpc->next) if (!l--) return mpc; return NULL; } static void *mpc_next(struct seq_file *m, void *v, loff_t *pos) { struct mpoa_client *p = v; (*pos)++; return v == SEQ_START_TOKEN ? mpcs : p->next; } static void mpc_stop(struct seq_file *m, void *v) { } /* * READING function - called when the /proc/atm/mpoa file is read from. */ static int mpc_show(struct seq_file *m, void *v) { struct mpoa_client *mpc = v; int i; in_cache_entry *in_entry; eg_cache_entry *eg_entry; struct timeval now; unsigned char ip_string[16]; if (v == SEQ_START_TOKEN) { atm_mpoa_disp_qos(m); return 0; } seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num); seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n"); do_gettimeofday(&now); for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) { sprintf(ip_string, "%pI4", &in_entry->ctrl_info.in_dst_ip); seq_printf(m, "%-16s%s%-14lu%-12u", ip_string, ingress_state_string(in_entry->entry_state), in_entry->ctrl_info.holding_time - (now.tv_sec-in_entry->tv.tv_sec), in_entry->packets_fwded); if (in_entry->shortcut) seq_printf(m, " %-3d %-3d", in_entry->shortcut->vpi, in_entry->shortcut->vci); seq_printf(m, "\n"); } seq_printf(m, "\n"); seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n"); for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) { unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr; for (i = 0; i < ATM_ESA_LEN; i++) seq_printf(m, "%02x", p[i]); seq_printf(m, "\n%-16lu%s%-14lu%-15u", (unsigned long)ntohl(eg_entry->ctrl_info.cache_id), egress_state_string(eg_entry->entry_state), (eg_entry->ctrl_info.holding_time - (now.tv_sec-eg_entry->tv.tv_sec)), eg_entry->packets_rcvd); /* latest IP address */ sprintf(ip_string, "%pI4", &eg_entry->latest_ip_addr); seq_printf(m, "%-16s", ip_string); if (eg_entry->shortcut) seq_printf(m, " %-3d %-3d", eg_entry->shortcut->vpi, eg_entry->shortcut->vci); seq_printf(m, "\n"); } seq_printf(m, "\n"); return 0; } static const struct seq_operations mpc_op = { .start = mpc_start, .next = mpc_next, .stop = mpc_stop, .show = mpc_show }; static int proc_mpc_open(struct inode *inode, struct file *file) { return seq_open(file, &mpc_op); } static ssize_t proc_mpc_write(struct file *file, const char __user *buff, size_t nbytes, loff_t *ppos) { char *page, *p; unsigned int len; if (nbytes == 0) return 0; if (nbytes >= PAGE_SIZE) nbytes = PAGE_SIZE-1; page = (char *)__get_free_page(GFP_KERNEL); if (!page) return -ENOMEM; for (p = page, len = 0; len < nbytes; p++, len++) { if (get_user(*p, buff++)) { free_page((unsigned long)page); return -EFAULT; } if (*p == '\0' || *p == '\n') break; } *p = '\0'; if (!parse_qos(page)) printk("mpoa: proc_mpc_write: could not parse '%s'\n", page); free_page((unsigned long)page); return len; } static int parse_qos(const char *buff) { /* possible lines look like this * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu */ unsigned char ip[4]; int tx_pcr, tx_sdu, rx_pcr, rx_sdu; __be32 ipaddr; struct atm_qos qos; memset(&qos, 0, sizeof(struct atm_qos)); if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu", ip, ip+1, ip+2, ip+3) == 4) { ipaddr = *(__be32 *)ip; return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr)); } if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx", ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) { rx_pcr = tx_pcr; rx_sdu = tx_sdu; } else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d", ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8) return 0; ipaddr = *(__be32 *)ip; qos.txtp.traffic_class = ATM_CBR; qos.txtp.max_pcr = tx_pcr; qos.txtp.max_sdu = tx_sdu; qos.rxtp.traffic_class = ATM_CBR; qos.rxtp.max_pcr = rx_pcr; qos.rxtp.max_sdu = rx_sdu; qos.aal = ATM_AAL5; dprintk("parse_qos(): setting qos parameters to tx=%d,%d rx=%d,%d\n", qos.txtp.max_pcr, qos.txtp.max_sdu, qos.rxtp.max_pcr, qos.rxtp.max_sdu); atm_mpoa_add_qos(ipaddr, &qos); return 1; } /* * INITIALIZATION function - called when module is initialized/loaded. */ int mpc_proc_init(void) { struct proc_dir_entry *p; p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations); if (!p) { pr_err("Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME); return -ENOMEM; } return 0; } /* * DELETING function - called when module is removed. */ void mpc_proc_clean(void) { remove_proc_entry(STAT_FILE_NAME, atm_proc_root); } #endif /* CONFIG_PROC_FS */ NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/sched/act_gact.c')