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      1 /**********************************************************
      2  * Copyright 2009-2015 VMware, Inc.  All rights reserved.
      3  *
      4  * Permission is hereby granted, free of charge, to any person
      5  * obtaining a copy of this software and associated documentation
      6  * files (the "Software"), to deal in the Software without
      7  * restriction, including without limitation the rights to use, copy,
      8  * modify, merge, publish, distribute, sublicense, and/or sell copies
      9  * of the Software, and to permit persons to whom the Software is
     10  * furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice shall be
     13  * included in all copies or substantial portions of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     22  * SOFTWARE.
     23  *
     24  **********************************************************/
     25 
     26 
     27 #include "vmw_screen.h"
     28 #include "vmw_fence.h"
     29 #include "vmw_context.h"
     30 
     31 #include "util/u_memory.h"
     32 #include "pipe/p_compiler.h"
     33 #include "util/u_hash_table.h"
     34 #ifdef MAJOR_IN_MKDEV
     35 #include <sys/mkdev.h>
     36 #endif
     37 #ifdef MAJOR_IN_SYSMACROS
     38 #include <sys/sysmacros.h>
     39 #endif
     40 #include <sys/stat.h>
     41 #include <unistd.h>
     42 #include <fcntl.h>
     43 
     44 static struct util_hash_table *dev_hash = NULL;
     45 
     46 static int vmw_dev_compare(void *key1, void *key2)
     47 {
     48    return (major(*(dev_t *)key1) == major(*(dev_t *)key2) &&
     49            minor(*(dev_t *)key1) == minor(*(dev_t *)key2)) ? 0 : 1;
     50 }
     51 
     52 static unsigned vmw_dev_hash(void *key)
     53 {
     54    return (major(*(dev_t *) key) << 16) | minor(*(dev_t *) key);
     55 }
     56 
     57 /* Called from vmw_drm_create_screen(), creates and initializes the
     58  * vmw_winsys_screen structure, which is the main entity in this
     59  * module.
     60  * First, check whether a vmw_winsys_screen object already exists for
     61  * this device, and in that case return that one, making sure that we
     62  * have our own file descriptor open to DRM.
     63  */
     64 
     65 struct vmw_winsys_screen *
     66 vmw_winsys_create( int fd )
     67 {
     68    struct vmw_winsys_screen *vws;
     69    struct stat stat_buf;
     70 
     71    if (dev_hash == NULL) {
     72       dev_hash = util_hash_table_create(vmw_dev_hash, vmw_dev_compare);
     73       if (dev_hash == NULL)
     74          return NULL;
     75    }
     76 
     77    if (fstat(fd, &stat_buf))
     78       return NULL;
     79 
     80    vws = util_hash_table_get(dev_hash, &stat_buf.st_rdev);
     81    if (vws) {
     82       vws->open_count++;
     83       return vws;
     84    }
     85 
     86    vws = CALLOC_STRUCT(vmw_winsys_screen);
     87    if (!vws)
     88       goto out_no_vws;
     89 
     90    vws->device = stat_buf.st_rdev;
     91    vws->open_count = 1;
     92    vws->ioctl.drm_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
     93    vws->base.have_gb_dma = TRUE;
     94    vws->base.need_to_rebind_resources = FALSE;
     95 
     96    if (!vmw_ioctl_init(vws))
     97       goto out_no_ioctl;
     98 
     99    vws->fence_ops = vmw_fence_ops_create(vws);
    100    if (!vws->fence_ops)
    101       goto out_no_fence_ops;
    102 
    103    if(!vmw_pools_init(vws))
    104       goto out_no_pools;
    105 
    106    if (!vmw_winsys_screen_init_svga(vws))
    107       goto out_no_svga;
    108 
    109    if (util_hash_table_set(dev_hash, &vws->device, vws) != PIPE_OK)
    110       goto out_no_hash_insert;
    111 
    112    return vws;
    113 out_no_hash_insert:
    114 out_no_svga:
    115    vmw_pools_cleanup(vws);
    116 out_no_pools:
    117    vws->fence_ops->destroy(vws->fence_ops);
    118 out_no_fence_ops:
    119    vmw_ioctl_cleanup(vws);
    120 out_no_ioctl:
    121    close(vws->ioctl.drm_fd);
    122    FREE(vws);
    123 out_no_vws:
    124    return NULL;
    125 }
    126 
    127 void
    128 vmw_winsys_destroy(struct vmw_winsys_screen *vws)
    129 {
    130    if (--vws->open_count == 0) {
    131       util_hash_table_remove(dev_hash, &vws->device);
    132       vmw_pools_cleanup(vws);
    133       vws->fence_ops->destroy(vws->fence_ops);
    134       vmw_ioctl_cleanup(vws);
    135       close(vws->ioctl.drm_fd);
    136       FREE(vws);
    137    }
    138 }
    139