/*- * Copyright (c) 2017 Broadcom. All rights reserved. * The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. Neither the name of the copyright holder nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ /** * @file * bsd specific headers common to the driver */ #ifndef _OCS_OS_H #define _OCS_OS_H /*************************************************************************** * OS specific includes */ #include "opt_stack.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* for debug of memory allocations */ /* OCS_OS_MAX_ISR_TIME_MSEC - maximum time driver code should spend in an interrupt * or kernel thread context without yielding */ #define OCS_OS_MAX_ISR_TIME_MSEC 1000 /* BSD driver specific definitions */ #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) #define OCS_MAX_LUN 512 #define OCS_NUM_UNSOLICITED_FRAMES 1024 #define OCS_MAX_DOMAINS 1 #define OCS_MAX_REMOTE_NODES 2048 #define OCS_MAX_TARGETS 1024 #define OCS_MAX_INITIATORS 1024 /** Reserve this number of IO for each intiator to return FULL/BUSY status */ #define OCS_RSVD_INI_IO 8 #define OCS_MIN_DMA_ALIGNMENT 16 #define OCS_MAX_DMA_ALLOC (64*1024) /* maxium DMA allocation that is expected to reliably succeed */ /* * Macros used to size the CQ hash table. We want to round up to the next * power of 2 for the hash. */ #define B2(x) ( (x) | ( (x) >> 1) ) #define B4(x) ( B2(x) | ( B2(x) >> 2) ) #define B8(x) ( B4(x) | ( B4(x) >> 4) ) #define B16(x) ( B8(x) | ( B8(x) >> 8) ) #define B32(x) (B16(x) | (B16(x) >>16) ) #define B32_NEXT_POWER_OF_2(x) (B32((x)-1) + 1) /* * likely/unlikely - branch prediction hint */ #define likely(x) __builtin_expect(!!(x), 1) #define unlikely(x) __builtin_expect(!!(x), 0) /*************************************************************************** * OS abstraction */ /** * @brief Min/Max macros * */ #define OCS_MAX(x, y) ((x) > (y) ? (x) : (y)) #define OCS_MIN(x, y) ((x) < (y) ? (x) : (y)) #define PRIX64 "lX" #define PRIx64 "lx" #define PRId64 "ld" #define PRIu64 "lu" /** * Enable optional features * - OCS_INCLUDE_DEBUG include low-level SLI debug support */ #define OCS_INCLUDE_DEBUG /** * @brief Set the Nth bit * * @todo move to a private file used internally? */ #ifndef BIT #define BIT(n) (1U << (n)) #endif /*************************************************************************** * Platform specific operations */ typedef struct ocs_softc ocs_t; /** * @ingroup os * @typedef ocs_os_handle_t * @brief OS specific handle or driver context * * This can be anything from a void * to some other OS specific type. The lower * layers make no assumption about its value and pass it back as the first * parameter to most OS functions. */ typedef ocs_t * ocs_os_handle_t; /** * @ingroup os * @brief return the lower 32-bits of a bus address * * @param addr Physical or bus address to convert * @return lower 32-bits of a bus address * * @note this may be a good cadidate for an inline or macro */ static inline uint32_t ocs_addr32_lo(uintptr_t addr) { #if defined(__LP64__) return (uint32_t)(addr & 0xffffffffUL); #else return addr; #endif } /** * @ingroup os * @brief return the upper 32-bits of a bus address * * @param addr Physical or bus address to convert * @return upper 32-bits of a bus address * * @note this may be a good cadidate for an inline or macro */ static inline uint32_t ocs_addr32_hi(uintptr_t addr) { #if defined(__LP64__) return (uint32_t)(addr >> 32); #else return 0; #endif } /** * @ingroup os * @brief return the log2(val) * * @param val number to use (assumed to be exact power of 2) * * @return log base 2 of val */ static inline uint32_t ocs_lg2(uint32_t val) { #if defined(__GNUC__) /* * clz = "count leading zero's" * * Assuming val is an exact power of 2, the most significant bit * will be the log base 2 of val */ return 31 - __builtin_clz(val); #else #error You need to provide a non-GCC version of this function #endif } /** * @ingroup os * @brief optimization barrier * * Optimization barrier. Prevents compiler re-ordering * instructions across barrier. * * @return none */ #define ocs_barrier() __asm __volatile("" : : : "memory"); /** * @ingroup os * @brief convert a big endian 32 bit value to the host's native format * * @param val 32 bit big endian value * * @return value converted to the host's native endianness */ #define ocs_be32toh(val) be32toh(val) /** * @ingroup os * @brief convert a 32 bit value from the host's native format to big endian * * @param val 32 bit native endian value * * @return value converted to big endian */ #define ocs_htobe32(val) htobe32(val) /** * @ingroup os * @brief convert a 16 bit value from the host's native format to big endian * * @param v 16 bit native endian value * * @return value converted to big endian */ #define ocs_htobe16(v) htobe16(v) #define ocs_be16toh(v) be16toh(v) #define ocs_htobe64(v) htobe64(v) #define ocs_be64toh(v) be64toh(v) /** * @ingroup os * @brief Delay execution by the given number of micro-seconds * * @param usec number of micro-seconds to "busy-wait" * * @note The value of usec may be greater than 1,000,000 */ #define ocs_udelay(usec) DELAY(usec) /** * @ingroup os * @brief Delay execution by the given number of milli-seconds * * @param msec number of milli-seconds to "busy-wait" * * @note The value of usec may be greater than 1,000,000 */ #define ocs_msleep(msec) ocs_udelay((msec)*1000) /** * @ingroup os * @brief Get time of day in msec * * @return time of day in msec */ static inline time_t ocs_msectime(void) { struct timeval tv; getmicrotime(&tv); return (tv.tv_sec*1000) + (tv.tv_usec / 1000); } /** * @ingroup os * @brief Copy length number of bytes from the source to destination address * * @param d pointer to the destination memory * @param s pointer to the source memory * @param l number of bytes to copy * * @return original value of dst pointer */ #define ocs_memcpy(d, s, l) memcpy(d, s, l) #define ocs_strlen(s) strlen(s) #define ocs_strcpy(d,s) strcpy(d, s) #define ocs_strncpy(d,s, n) strncpy(d, s, n) #define ocs_strcat(d, s) strcat(d, s) #define ocs_strtoul(s,ep,b) strtoul(s,ep,b) #define ocs_strtoull(s,ep,b) ((uint64_t)strtouq(s,ep,b)) #define ocs_atoi(s) strtol(s, 0, 0) #define ocs_strcmp(d,s) strcmp(d,s) #define ocs_strcasecmp(d,s) strcasecmp(d,s) #define ocs_strncmp(d,s,n) strncmp(d,s,n) #define ocs_strstr(h,n) strstr(h,n) #define ocs_strsep(h, n) strsep(h, n) #define ocs_strchr(s,c) strchr(s,c) #define ocs_copy_from_user(dst, src, n) copyin(src, dst, n) #define ocs_copy_to_user(dst, src, n) copyout(src, dst, n) #define ocs_snprintf(buf, n, fmt, ...) snprintf(buf, n, fmt, ##__VA_ARGS__) #define ocs_vsnprintf(buf, n, fmt, ap) vsnprintf((char*)buf, n, fmt, ap) #define ocs_sscanf(buf,fmt, ...) sscanf(buf, fmt, ##__VA_ARGS__) #define ocs_printf printf #define ocs_isspace(c) isspace(c) #define ocs_isdigit(c) isdigit(c) #define ocs_isxdigit(c) isxdigit(c) extern uint64_t ocs_get_tsc(void); extern void *ocs_ioctl_preprocess(ocs_os_handle_t os, void *arg, size_t size); extern int32_t ocs_ioctl_postprocess(ocs_os_handle_t os, void *arg, void *kern_ptr, size_t size); extern void ocs_ioctl_free(ocs_os_handle_t os, void *kern_ptr, size_t size); extern char *ocs_strdup(const char *s); /** * @ingroup os * @brief Set the value of each byte in memory * * @param b pointer to the memory * @param c value used to set memory * @param l number of bytes to set * * @return original value of mem pointer */ #define ocs_memset(b, c, l) memset(b, c, l) #define LOG_CRIT 0 #define LOG_ERR 1 #define LOG_WARN 2 #define LOG_INFO 3 #define LOG_TEST 4 #define LOG_DEBUG 5 extern int loglevel; extern void _ocs_log(ocs_t *ocs, const char *func, int line, const char *fmt, ...); #define ocs_log_crit(os, fmt, ...) ocs_log(os, LOG_CRIT, fmt, ##__VA_ARGS__); #define ocs_log_err(os, fmt, ...) ocs_log(os, LOG_ERR, fmt, ##__VA_ARGS__); #define ocs_log_warn(os, fmt, ...) ocs_log(os, LOG_WARN, fmt, ##__VA_ARGS__); #define ocs_log_info(os, fmt, ...) ocs_log(os, LOG_INFO, fmt, ##__VA_ARGS__); #define ocs_log_test(os, fmt, ...) ocs_log(os, LOG_TEST, fmt, ##__VA_ARGS__); #define ocs_log_debug(os, fmt, ...) ocs_log(os, LOG_DEBUG, fmt, ##__VA_ARGS__); #define ocs_log(os, level, fmt, ...) \ do { \ if (level <= loglevel) { \ _ocs_log(os, __func__, __LINE__, fmt, ##__VA_ARGS__); \ } \ } while (0) static inline uint32_t ocs_roundup(uint32_t x, uint32_t y) { return (((x + y - 1) / y) * y); } static inline uint32_t ocs_rounddown(uint32_t x, uint32_t y) { return ((x / y) * y); } /*************************************************************************** * Memory allocation interfaces */ #define OCS_M_ZERO M_ZERO #define OCS_M_NOWAIT M_NOWAIT /** * @ingroup os * @brief Allocate host memory * * @param os OS handle * @param size number of bytes to allocate * @param flags additional options * * Flags include * - OCS_M_ZERO zero memory after allocating * - OCS_M_NOWAIT do not block/sleep waiting for an allocation request * * @return pointer to allocated memory, NULL otherwise */ extern void *ocs_malloc(ocs_os_handle_t os, size_t size, int32_t flags); /** * @ingroup os * @brief Free host memory * * @param os OS handle * @param addr pointer to memory * @param size bytes to free */ extern void ocs_free(ocs_os_handle_t os, void *addr, size_t size); /** * @ingroup os * @brief generic DMA memory descriptor for driver allocations * * Memory regions ultimately used by the hardware are described using * this structure. All implementations must include the structure members * defined in the first section, and they may also add their own structure * members in the second section. * * Note that each region described by ocs_dma_s is assumed to be physically * contiguous. */ typedef struct ocs_dma_s { /* * OCS layer requires the following members */ void *virt; /**< virtual address of the memory used by the CPU */ void *alloc; /**< originally allocated virtual address used to restore virt if modified */ uintptr_t phys; /**< physical or bus address of the memory used by the hardware */ size_t size; /**< size in bytes of the memory */ /* * Implementation specific fields allowed here */ size_t len; /**< application specific length */ bus_dma_tag_t tag; bus_dmamap_t map; } ocs_dma_t; /** * @ingroup os * @brief Returns maximum supported DMA allocation size * * @param os OS specific handle or driver context * @param align alignment requirement for DMA allocation * * Return maximum supported DMA allocation size, given alignment * requirement. * * @return maxiumum supported DMA allocation size */ static inline uint32_t ocs_max_dma_alloc(ocs_os_handle_t os, size_t align) { return ~((uint32_t)0); /* no max */ } /** * @ingroup os * @brief Allocate a DMA capable block of memory * * @param os OS specific handle or driver context * @param dma DMA descriptor containing results of memory allocation * @param size Size in bytes of desired allocation * @param align Alignment in bytes of the requested allocation * * @return 0 on success, non-zero otherwise */ extern int32_t ocs_dma_alloc(ocs_os_handle_t, ocs_dma_t *, size_t, size_t); /** * @ingroup os * @brief Free a DMA capable block of memory * * @param os OS specific handle or driver context * @param dma DMA descriptor for memory to be freed * * @return 0 if memory is de-allocated, non-zero otherwise */ extern int32_t ocs_dma_free(ocs_os_handle_t, ocs_dma_t *); extern int32_t ocs_dma_copy_in(ocs_dma_t *dma, void *buffer, uint32_t buffer_length); extern int32_t ocs_dma_copy_out(ocs_dma_t *dma, void *buffer, uint32_t buffer_length); static inline int32_t ocs_dma_valid(ocs_dma_t *dma) { return (dma->size != 0); } /** * @ingroup os * @brief Synchronize the DMA buffer memory * * Ensures memory coherency between the CPU and device * * @param dma DMA descriptor of memory to synchronize * @param flags Describes direction of synchronization * - OCS_DMASYNC_PREREAD sync needed before hardware updates host memory * - OCS_DMASYNC_PREWRITE sync needed after CPU updates host memory but before hardware can access * - OCS_DMASYNC_POSTREAD sync needed after hardware updates host memory but before CPU can access * - OCS_DMASYNC_POSTWRITE sync needed after hardware updates host memory */ extern void ocs_dma_sync(ocs_dma_t *, uint32_t); #define OCS_DMASYNC_PREWRITE BUS_DMASYNC_PREWRITE #define OCS_DMASYNC_POSTREAD BUS_DMASYNC_POSTREAD /*************************************************************************** * Locking */ /** * @ingroup os * @typedef ocs_lock_t * @brief Define the type used implement locking */ #define MAX_LOCK_DESC_LEN 64 typedef struct ocs_lock_s { struct mtx lock; char name[MAX_LOCK_DESC_LEN]; } ocs_lock_t; /** * @ingroup os * @brief Initialize a lock * * @param lock lock to initialize * @param name string identifier for the lock */ extern void ocs_lock_init(void *os, ocs_lock_t *lock, const char *name, ...); /** * @ingroup os * @brief Free a previously allocated lock * * @param lock lock to free */ static inline void ocs_lock_free(ocs_lock_t *lock) { if (mtx_initialized(&(lock)->lock)) { mtx_assert(&(lock)->lock, MA_NOTOWNED); mtx_destroy(&(lock)->lock); } else { panic("XXX trying to free with un-initialized mtx!?!?\n"); } } /** * @ingroup os * @brief Acquire a lock * * @param lock lock to obtain */ static inline void ocs_lock(ocs_lock_t *lock) { if (mtx_initialized(&(lock)->lock)) { mtx_assert(&(lock)->lock, MA_NOTOWNED); mtx_lock(&(lock)->lock); } else { panic("XXX trying to lock with un-initialized mtx!?!?\n"); } } /** * @ingroup os * @brief Release a lock * * @param lock lock to release */ static inline void ocs_unlock(ocs_lock_t *lock) { if (mtx_initialized(&(lock)->lock)) { mtx_assert(&(lock)->lock, MA_OWNED | MA_NOTRECURSED); mtx_unlock(&(lock)->lock); } else { panic("XXX trying to unlock with un-initialized mtx!?!?\n"); } } /** * @ingroup os * @typedef ocs_lock_t * @brief Define the type used implement recursive locking */ typedef struct ocs_lock_s ocs_rlock_t; /** * @ingroup os * @brief Initialize a recursive lock * * @param ocs pointer to ocs structure * @param lock lock to initialize * @param name string identifier for the lock */ static inline void ocs_rlock_init(ocs_t *ocs, ocs_rlock_t *lock, const char *name) { ocs_strncpy(lock->name, name, MAX_LOCK_DESC_LEN); mtx_init(&(lock)->lock, lock->name, NULL, MTX_DEF | MTX_RECURSE | MTX_DUPOK); } /** * @ingroup os * @brief Free a previously allocated recursive lock * * @param lock lock to free */ static inline void ocs_rlock_free(ocs_rlock_t *lock) { if (mtx_initialized(&(lock)->lock)) { mtx_destroy(&(lock)->lock); } else { panic("XXX trying to free with un-initialized mtx!?!?\n"); } } /** * @brief try to acquire a recursive lock * * Attempt to acquire a recursive lock, return TRUE if successful * * @param lock pointer to recursive lock * * @return TRUE if lock was acquired, FALSE if not */ static inline int32_t ocs_rlock_try(ocs_rlock_t *lock) { int rc = mtx_trylock(&(lock)->lock); return rc != 0; } /** * @ingroup os * @brief Acquire a recursive lock * * @param lock lock to obtain */ static inline void ocs_rlock_acquire(ocs_rlock_t *lock) { if (mtx_initialized(&(lock)->lock)) { mtx_lock(&(lock)->lock); } else { panic("XXX trying to lock with un-initialized mtx!?!?\n"); } } /** * @ingroup os * @brief Release a recursive lock * * @param lock lock to release */ static inline void ocs_rlock_release(ocs_rlock_t *lock) { if (mtx_initialized(&(lock)->lock)) { mtx_assert(&(lock)->lock, MA_OWNED); mtx_unlock(&(lock)->lock); } else { panic("XXX trying to unlock with un-initialized mtx!?!?\n"); } } /** * @brief counting semaphore * * Declaration of the counting semaphore object * */ typedef struct { char name[32]; struct sema sem; /**< OS counting semaphore structure */ } ocs_sem_t; #define OCS_SEM_FOREVER (-1) #define OCS_SEM_TRY (0) /** * @brief Initialize a counting semaphore * * The semaphore is initiatlized to the value * * @param sem pointer to semaphore * @param val initial value * @param name label for the semaphore * * @return returns 0 for success, a negative error code value for failure. */ extern int ocs_sem_init(ocs_sem_t *sem, int val, const char *name, ...) __attribute__((format(printf, 3, 4))); /** * @brief execute a P (decrement) operation * * A P (decrement and block if negative) operation is performed on the semaphore. * * If timeout_usec is zero, the semaphore attempts one time and returns 0 if acquired. * If timeout_usec is greater than zero, then the call will block until the semaphore * is acquired, or a timeout occurred. If timeout_usec is less than zero, then * the call will block until the semaphore is acquired. * * @param sem pointer to semaphore * @param timeout_usec timeout in microseconds * * @return returns 0 for success, negative value if the semaphore was not acquired. */ static inline int ocs_sem_p(ocs_sem_t *sem, int timeout_usec) { int32_t rc = 0; if (timeout_usec == 0) { rc = sema_trywait(&sem->sem); if (rc == 0) { rc = -1; } } else if (timeout_usec > 0) { struct timeval tv; uint32_t ticks; tv.tv_sec = timeout_usec / 1000000; tv.tv_usec = timeout_usec % 1000000; ticks = tvtohz(&tv); if (ticks == 0) { ticks ++; } rc = sema_timedwait(&sem->sem, ticks); if (rc != 0) { rc = -1; } } else { sema_wait(&sem->sem); } if (rc) rc = -1; return rc; } /** * @brief perform a V (increment) operation on a counting semaphore * * The semaphore is incremented, unblocking one thread that is waiting on the * sempahore * * @param sem pointer to the semaphore * * @return none */ static inline void ocs_sem_v(ocs_sem_t *sem) { sema_post(&sem->sem); } /*************************************************************************** * Bitmap */ /** * @ingroup os * @typedef ocs_bitmap_t * @brief Define the type used implement bit-maps */ typedef bitstr_t ocs_bitmap_t; /** * @ingroup os * @brief Allocate a bitmap * * @param n_bits Minimum number of entries in the bit-map * * @return pointer to the bit-map or NULL on error */ extern ocs_bitmap_t *ocs_bitmap_alloc(uint32_t n_bits); /** * @ingroup os * @brief Free a bit-map * * @param bitmap Bit-map to free */ extern void ocs_bitmap_free(ocs_bitmap_t *bitmap); /** * @ingroup os * @brief Find next unset bit and set it * * @param bitmap bit map to search * @param n_bits number of bits in map * * @return bit position or -1 if map is full */ extern int32_t ocs_bitmap_find(ocs_bitmap_t *bitmap, uint32_t n_bits); /** * @ingroup os * @brief search for next (un)set bit * * @param bitmap bit map to search * @param set search for a set or unset bit * @param n_bits number of bits in map * * @return bit position or -1 */ extern int32_t ocs_bitmap_search(ocs_bitmap_t *bitmap, uint8_t set, uint32_t n_bits); /** * @ingroup os * @brief clear the specified bit * * @param bitmap pointer to bit map * @param bit bit number to clear */ extern void ocs_bitmap_clear(ocs_bitmap_t *bitmap, uint32_t bit); extern int32_t ocs_get_property(const char *prop_name, char *buffer, uint32_t buffer_len); /*************************************************************************** * Timer Routines * * Functions for setting, querying and canceling timers. */ typedef struct { struct callout callout; struct mtx lock; void (*func)(void *); void *data; } ocs_timer_t; /** * @ingroup os * @brief Initialize and set a timer * * @param os OS handle * @param timer pointer to the structure allocated for this timer * @param func the function to call when the timer expires * @param data Data to pass to the provided timer function when the timer * expires. * @param timeout_ms the timeout in milliseconds */ extern int32_t ocs_setup_timer(ocs_os_handle_t os, ocs_timer_t *timer, void(*func)(void *arg), void *data, uint32_t timeout_ms); /** * @ingroup os * @brief Modify a timer's expiration * * @param timer pointer to the structure allocated for this timer * @param timeout_ms the timeout in milliseconds */ extern int32_t ocs_mod_timer(ocs_timer_t *timer, uint32_t timeout_ms); /** * @ingroup os * @brief Queries to see if a timer is pending. * * @param timer pointer to the structure allocated for this timer * * @return non-zero if the timer is pending */ extern int32_t ocs_timer_pending(ocs_timer_t *timer); /** * @ingroup os * @brief Remove a pending timer * * @param timer pointer to the structure allocated for this timer * expires. */ extern int32_t ocs_del_timer(ocs_timer_t *timer); /*************************************************************************** * Atomics * */ typedef uint32_t ocs_atomic_t; /** * @ingroup os * @brief initialize an atomic * * @param a pointer to the atomic object * @param v initial value * * @return none */ #define ocs_atomic_init(a, v) ocs_atomic_set(a, v) /** * @ingroup os * @brief adds an integer to an atomic value * * @param a pointer to the atomic object * @param v value to increment * * @return the value of the atomic before incrementing. */ #define ocs_atomic_add_return(a, v) atomic_fetchadd_32(a, v) /** * @ingroup os * @brief subtracts an integer to an atomic value * * @param a pointer to the atomic object * @param v value to increment * * @return the value of the atomic before subtracting. */ #define ocs_atomic_sub_return(a, v) atomic_fetchadd_32(a, (-(v))) /** * @ingroup os * @brief returns the current value of an atomic object * * @param a pointer to the atomic object * * @return the value of the atomic. */ #define ocs_atomic_read(a) atomic_load_acq_32(a) /** * @ingroup os * @brief sets the current value of an atomic object * * @param a pointer to the atomic object */ #define ocs_atomic_set(a, v) atomic_store_rel_32(a, v) /** * @ingroup os * @brief Sets atomic to 0, returns previous value * * @param a pointer to the atomic object * * @return the value of the atomic before the operation. */ #define ocs_atomic_read_and_clear atomic_readandclear_32(a) /** * @brief OCS thread structure * */ typedef struct ocs_thread_s ocs_thread_t; typedef int32_t (*ocs_thread_fctn)(ocs_thread_t *mythread); struct ocs_thread_s { struct thread *tcb; /*<< thread control block */ ocs_thread_fctn fctn; /*<< thread function */ char *name; /*<< name of thread */ void *arg; /*<< pointer to thread argument */ ocs_atomic_t terminate; /*<< terminate request */ int32_t retval; /*<< return value */ uint32_t cpu_affinity; /*<< cpu affinity */ }; #define OCS_THREAD_DEFAULT_STACK_SIZE_PAGES 8 /** * @brief OCS thread start options * */ typedef enum { OCS_THREAD_RUN, /*<< run immediately */ OCS_THREAD_CREATE, /*<< create and wait for start request */ } ocs_thread_start_e; extern int32_t ocs_thread_create(ocs_os_handle_t os, ocs_thread_t *thread, ocs_thread_fctn fctn, const char *name, void *arg, ocs_thread_start_e start_option); extern int32_t ocs_thread_start(ocs_thread_t *thread); extern void *ocs_thread_get_arg(ocs_thread_t *mythread); extern int32_t ocs_thread_terminate(ocs_thread_t *thread); extern int32_t ocs_thread_terminate_requested(ocs_thread_t *thread); extern int32_t ocs_thread_get_retval(ocs_thread_t *thread); extern void ocs_thread_yield(ocs_thread_t *thread); extern ocs_thread_t *ocs_thread_self(void); extern int32_t ocs_thread_setcpu(ocs_thread_t *thread, uint32_t cpu); extern int32_t ocs_thread_getcpu(void); /*************************************************************************** * PCI * * Several functions below refer to a "register set". This is one or * more PCI BARs that constitute a PCI address. For example, if a MMIO * region is described using both BAR[0] and BAR[1], the combination of * BARs defines register set 0. */ /** * @brief tracks mapped PCI memory regions */ typedef struct ocs_pci_reg_s { uint32_t rid; struct resource *res; bus_space_tag_t btag; bus_space_handle_t bhandle; } ocs_pci_reg_t; #define PCI_MAX_BAR 6 #define PCI_64BIT_BAR0 0 #define PCI_VENDOR_EMULEX 0x10df /* Emulex */ #define PCI_PRODUCT_EMULEX_OCE16001 0xe200 /* OneCore 16Gb FC (lancer) */ #define PCI_PRODUCT_EMULEX_OCE16002 0xe200 /* OneCore 16Gb FC (lancer) */ #define PCI_PRODUCT_EMULEX_LPE31004 0xe300 /* LightPulse 16Gb x 4 FC (lancer-g6) */ #define PCI_PRODUCT_EMULEX_LPE32002 0xe300 /* LightPulse 32Gb x 2 FC (lancer-g6) */ #define PCI_PRODUCT_EMULEX_LANCER_G7 0xf400 /* LightPulse 32Gb x 4 FC (lancer-g7) */ #define PCI_PRODUCT_EMULEX_OCE1600_VF 0xe208 #define PCI_PRODUCT_EMULEX_OCE50102 0xe260 /* OneCore FCoE (lancer) */ #define PCI_PRODUCT_EMULEX_OCE50102_VF 0xe268 /** * @ingroup os * @brief Get the PCI bus, device, and function values * * @param ocs OS specific handle or driver context * @param bus Pointer to location to store the bus number. * @param dev Pointer to location to store the device number. * @param func Pointer to location to store the function number. * */ extern void ocs_get_bus_dev_func(ocs_t *ocs, uint8_t* bus, uint8_t* dev, uint8_t* func); extern ocs_t *ocs_get_instance(uint32_t index); extern uint32_t ocs_instance(void *os); /** * @ingroup os * @brief Read a 32 bit value from the specified configuration register * * @param os OS specific handle or driver context * @param reg register offset * * @return The 32 bit value */ extern uint32_t ocs_config_read32(ocs_os_handle_t os, uint32_t reg); /** * @ingroup os * @brief Read a 16 bit value from the specified configuration * register * * @param os OS specific handle or driver context * @param reg register offset * * @return The 16 bit value */ extern uint16_t ocs_config_read16(ocs_os_handle_t os, uint32_t reg); /** * @ingroup os * @brief Read a 8 bit value from the specified configuration * register * * @param os OS specific handle or driver context * @param reg register offset * * @return The 8 bit value */ extern uint8_t ocs_config_read8(ocs_os_handle_t os, uint32_t reg); /** * @ingroup os * @brief Write a 8 bit value to the specified configuration * register * * @param os OS specific handle or driver context * @param reg register offset * @param val value to write * * @return None */ extern void ocs_config_write8(ocs_os_handle_t os, uint32_t reg, uint8_t val); /** * @ingroup os * @brief Write a 16 bit value to the specified configuration * register * * @param os OS specific handle or driver context * @param reg register offset * @param val value to write * * @return None */ extern void ocs_config_write16(ocs_os_handle_t os, uint32_t reg, uint16_t val); /** * @ingroup os * @brief Write a 32 bit value to the specified configuration * register * * @param os OS specific handle or driver context * @param reg register offset * @param val value to write * * @return None */ extern void ocs_config_write32(ocs_os_handle_t os, uint32_t reg, uint32_t val); /** * @ingroup os * @brief Read a PCI register * * @param os OS specific handle or driver context * @param rset Which "register set" to use * @param off Register offset * * @return 32 bit conents of the register */ extern uint32_t ocs_reg_read32(ocs_os_handle_t os, uint32_t rset, uint32_t off); /** * @ingroup os * @brief Read a PCI register * * @param os OS specific handle or driver context * @param rset Which "register set" to use * @param off Register offset * * @return 16 bit conents of the register */ extern uint16_t ocs_reg_read16(ocs_os_handle_t os, uint32_t rset, uint32_t off); /** * @ingroup os * @brief Read a PCI register * * @param os OS specific handle or driver context * @param rset Which "register set" to use * @param off Register offset * * @return 8 bit conents of the register */ extern uint8_t ocs_reg_read8(ocs_os_handle_t os, uint32_t rset, uint32_t off); /** * @ingroup os * @brief Write a PCI register * * @param os OS specific handle or driver context * @param rset Which "register set" to use * @param off Register offset * @param val 32-bit value to write */ extern void ocs_reg_write32(ocs_os_handle_t os, uint32_t rset, uint32_t off, uint32_t val); /** * @ingroup os * @brief Write a PCI register * * @param os OS specific handle or driver context * @param rset Which "register set" to use * @param off Register offset * @param val 16-bit value to write */ extern void ocs_reg_write16(ocs_os_handle_t os, uint32_t rset, uint32_t off, uint16_t val); /** * @ingroup os * @brief Write a PCI register * * @param os OS specific handle or driver context * @param rset Which "register set" to use * @param off Register offset * @param val 8-bit value to write */ extern void ocs_reg_write8(ocs_os_handle_t os, uint32_t rset, uint32_t off, uint8_t val); /** * @ingroup os * @brief Disable interrupts * * @param os OS specific handle or driver context */ extern void ocs_intr_disable(ocs_os_handle_t os); /** * @ingroup os * @brief Enable interrupts * * @param os OS specific handle or driver context */ extern void ocs_intr_enable(ocs_os_handle_t os); /** * @ingroup os * @brief Return model string * * @param os OS specific handle or driver context */ extern const char *ocs_pci_model(uint16_t vendor, uint16_t device); extern void ocs_print_stack(void); extern void ocs_abort(void) __attribute__((noreturn)); /*************************************************************************** * Reference counting * */ /** * @ingroup os * @brief reference counter object */ typedef void (*ocs_ref_release_t)(void *arg); typedef struct ocs_ref_s { ocs_ref_release_t release; /* release function to call */ void *arg; uint32_t count; /* ref count; no need to be atomic if we have a lock */ } ocs_ref_t; /** * @ingroup os * @brief initialize given reference object * * @param ref Pointer to reference object * @param release Function to be called when count is 0. * @param arg Argument to be passed to release function. */ static inline void ocs_ref_init(ocs_ref_t *ref, ocs_ref_release_t release, void *arg) { ref->release = release; ref->arg = arg; ocs_atomic_init(&ref->count, 1); } /** * @ingroup os * @brief Return reference count value * * @param ref Pointer to reference object * * @return Count value of given reference object */ static inline uint32_t ocs_ref_read_count(ocs_ref_t *ref) { return ocs_atomic_read(&ref->count); } /** * @ingroup os * @brief Set count on given reference object to a value. * * @param ref Pointer to reference object * @param i Set count to this value */ static inline void ocs_ref_set(ocs_ref_t *ref, int i) { ocs_atomic_set(&ref->count, i); } /** * @ingroup os * @brief Take a reference on given object. * * @par Description * This function takes a reference on an object. * * Note: this function should only be used if the caller can * guarantee that the reference count is >= 1 and will stay >= 1 * for the duration of this call (i.e. won't go to zero). If it * can't (the refcount may go to zero during this call), * ocs_ref_get_unless_zero() should be used instead. * * @param ref Pointer to reference object * */ static inline void ocs_ref_get(ocs_ref_t *ref) { ocs_atomic_add_return(&ref->count, 1); } /** * @ingroup os * @brief Take a reference on given object if count is not zero. * * @par Description * This function takes a reference on an object if and only if * the given reference object is "active" or valid. * * @param ref Pointer to reference object * * @return non-zero if "get" succeeded; Return zero if ref count * is zero. */ static inline uint32_t ocs_ref_get_unless_zero(ocs_ref_t *ref) { uint32_t rc = 0; rc = ocs_atomic_read(&ref->count); if (rc != 0) { ocs_atomic_add_return(&ref->count, 1); } return rc; } /** * @ingroup os * @brief Decrement reference on given object * * @par Description * This function decrements the reference count on the given * reference object. If the reference count becomes zero, the * "release" function (set during "init" time) is called. * * @param ref Pointer to reference object * * @return non-zero if release function was called; zero * otherwise. */ static inline uint32_t ocs_ref_put(ocs_ref_t *ref) { uint32_t rc = 0; if (ocs_atomic_sub_return(&ref->count, 1) == 1) { ref->release(ref->arg); rc = 1; } return rc; } /** * @ingroup os * @brief Get the OS system ticks * * @return number of ticks that have occurred since the system * booted. */ static inline uint64_t ocs_get_os_ticks(void) { return ticks; } /** * @ingroup os * @brief Get the OS system tick frequency * * @return frequency of system ticks. */ static inline uint32_t ocs_get_os_tick_freq(void) { return hz; } /***************************************************************************** * * CPU topology API */ typedef struct { uint32_t num_cpus; /* Number of CPU cores */ uint8_t hyper; /* TRUE if threaded CPUs */ } ocs_cpuinfo_t; extern int32_t ocs_get_cpuinfo(ocs_cpuinfo_t *cpuinfo); extern uint32_t ocs_get_num_cpus(void); #include "ocs_list.h" #include "ocs_utils.h" #include "ocs_mgmt.h" #include "ocs_common.h" #endif /* !_OCS_OS_H */