video: tegra: host: remove nvhost_channel from nvhost_master

- nvhost_master holds a reference to all the channels for
a chip architecture
- however, nvhost_master is a private data of host1x hardware
device. so it should contain only members needed by host1x
hardware device
- add chip specific apis to allocate and free channels
- this will also help to remove the static binding between
nvhost_device and a channel per SoC in future

Bug 871237

Change-Id: I2148db57b995b4cb60954ebb6e670f588552eca4
Signed-off-by: Mayuresh Kulkarni <mkulkarni@nvidia.com>
Reviewed-on: http://git-master/r/91687
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/video/tegra/host/nvhost_channel.c b/drivers/video/tegra/host/nvhost_channel.c
index e09f50a6694e..8b79479bdc1a 100644
--- a/drivers/video/tegra/host/nvhost_channel.c
+++ b/drivers/video/tegra/host/nvhost_channel.c
@@ -125,3 +125,29 @@ int nvhost_channel_suspend(struct nvhost_channel *ch)
 
 	return ret;
 }
+
+struct nvhost_channel *nvhost_alloc_channel_internal(int chindex,
+	int max_channels, int *current_channel_count)
+{
+	struct nvhost_channel *ch = NULL;
+
+	if ( (chindex > max_channels) ||
+	     ( (*current_channel_count + 1) > max_channels) )
+		return NULL;
+	else {
+		ch = kzalloc(sizeof(*ch), GFP_KERNEL);
+		if (ch == NULL)
+			return NULL;
+		else {
+			(*current_channel_count)++;
+			return ch;
+		}
+	}
+}
+
+void nvhost_free_channel_internal(struct nvhost_channel *ch,
+	int *current_channel_count)
+{
+	kfree(ch);
+	(*current_channel_count)--;
+}