sys/dev/drm/include/drm/drm_os_linux.h

   1 /**
   2  * \file drm_os_dragonfly.h
   3  * OS abstraction macros.
   4  */
   5
   6 #include <sys/param.h>
   7 #include <sys/endian.h>
   8 #include <sys/systm.h>
   9 #include <sys/serialize.h>
  10 #include <linux/interrupt.h>    /* For task queue support */
  11 #include <linux/delay.h>
  12
  13 /* Handle the DRM options from kernel config. */
  14 #ifdef __DragonFly__
  15 #include "opt_drm.h"
  16 #ifdef DRM_DEBUG
  17 #  if DRM_DEBUG>1
  18 #    define DRM_DEBUG_DEFAULT_ON 2
  19 #  else
  20 #    define DRM_DEBUG_DEFAULT_ON 1
  21 #  endif
  22 #undef DRM_DEBUG
  23 #else /* !DRM_DEBUG */
  24 #  define DRM_DEBUG_DEFAULT_ON 0
  25 #endif /* DRM_DEBUG */
  26 #endif /* __DragonFly__ */
  27
  28 #ifndef readq
  29 static inline u64 readq(void __iomem *reg)
  30 {
  31         return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);
  32 }
  33
  34 static inline void writeq(u64 val, void __iomem *reg)
  35 {
  36         writel(val & 0xffffffff, reg);
  37         writel(val >> 32, reg + 0x4UL);
  38 }
  39 #endif
  40
  41 /** Current process ID */
  42 #define DRM_CURRENTPID                  (curproc != NULL ? curproc->p_pid : -1)
  43 #define DRM_UDELAY(d)                   DELAY(d)
  44 /** Read a byte from a MMIO region */
  45 #define DRM_READ8(map, offset)          readb(((void __iomem *)(map)->handle) + (offset))
  46 /** Read a word from a MMIO region */
  47 #define DRM_READ16(map, offset)         readw(((void __iomem *)(map)->handle) + (offset))
  48 /** Read a dword from a MMIO region */
  49 #define DRM_READ32(map, offset)         readl(((void __iomem *)(map)->handle) + (offset))
  50 /** Write a byte into a MMIO region */
  51 #define DRM_WRITE8(map, offset, val)    writeb(val, ((void __iomem *)(map)->handle) + (offset))
  52 /** Write a word into a MMIO region */
  53 #define DRM_WRITE16(map, offset, val)   writew(val, ((void __iomem *)(map)->handle) + (offset))
  54 /** Write a dword into a MMIO region */
  55 #define DRM_WRITE32(map, offset, val)                                   \
  56         *(volatile u_int32_t *)(((vm_offset_t)(map)->handle) +          \
  57             (vm_offset_t)(offset)) = htole32(val)
  58
  59 /** Read a qword from a MMIO region - be careful using these unless you really understand them */
  60 #define DRM_READ64(map, offset)         readq(((void __iomem *)(map)->handle) + (offset))
  61 /** Write a qword into a MMIO region */
  62 #define DRM_WRITE64(map, offset, val)   writeq(val, ((void __iomem *)(map)->handle) + (offset))
  63
  64 #define DRM_WAIT_ON( ret, queue, timeout, condition )           \
  65 do {                                                            \
  66         wait_queue_t entry = {                                  \
  67                 .private        = current,                      \
  68                 .func           = default_wake_function,        \
  69         };                                                      \
  70         unsigned long end = jiffies + (timeout);                \
  71         add_wait_queue(&(queue), &entry);                       \
  72                                                                 \
  73         for (;;) {                                              \
  74                 __set_current_state(TASK_INTERRUPTIBLE);        \
  75                 if (condition)                                  \
  76                         break;                                  \
  77                 if (time_after_eq(jiffies, end)) {              \
  78                         ret = -EBUSY;                           \
  79                         break;                                  \
  80                 }                                               \
  81                 schedule_timeout((HZ/100 > 1) ? HZ/100 : 1);    \
  82                 if (signal_pending(current)) {                  \
  83                         ret = -EINTR;                           \
  84                         break;                                  \
  85                 }                                               \
  86         }                                                       \
  87         __set_current_state(TASK_RUNNING);                      \
  88         remove_wait_queue(&(queue), &entry);                    \
  89 } while (0)
  90
  91 /* include code to override EDID blocks from external firmware modules */
  92 #define CONFIG_DRM_LOAD_EDID_FIRMWARE