VSPD and VSP-DL devices can provide extended display lists supporting
extended command display list objects.
These extended commands require their own dma memory areas for a header
and body specific to the command type.
Implement a command pool to allocate all necessary memory in a single
DMA allocation to reduce pressure on the TLB, and provide convenvient
re-usable command objects for the entities to utilise.
Signed-off-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
---
drivers/media/platform/vsp1/vsp1_dl.c | 189 +++++++++++++++++++++++++++-
drivers/media/platform/vsp1/vsp1_dl.h | 3 +-
2 files changed, 192 insertions(+)
diff --git a/drivers/media/platform/vsp1/vsp1_dl.c
b/drivers/media/platform/vsp1/vsp1_dl.c
index 36440a2a2c8b..6d17b8bfa21c 100644
--- a/drivers/media/platform/vsp1/vsp1_dl.c
+++ b/drivers/media/platform/vsp1/vsp1_dl.c
@@ -121,6 +121,30 @@ struct vsp1_dl_body_pool {
};
/**
+ * struct vsp1_cmd_pool - display list body pool
+ * @dma: DMA address of the entries
+ * @size: size of the full DMA memory pool in bytes
+ * @mem: CPU memory pointer for the pool
+ * @bodies: Array of DLB structures for the pool
+ * @free: List of free DLB entries
+ * @lock: Protects the pool and free list
+ * @vsp1: the VSP1 device
+ */
+struct vsp1_dl_cmd_pool {
+ /* DMA allocation */
+ dma_addr_t dma;
+ size_t size;
+ void *mem;
+
+ struct vsp1_dl_ext_cmd *cmds;
+ struct list_head free;
+
+ spinlock_t lock;
+
+ struct vsp1_device *vsp1;
+};
+
+/**
* struct vsp1_dl_list - Display list
* @list: entry in the display list manager lists
* @dlm: the display list manager
@@ -176,6 +200,7 @@ struct vsp1_dl_manager {
struct vsp1_dl_list *pending;
struct vsp1_dl_body_pool *pool;
+ struct vsp1_dl_cmd_pool *autfld_cmds;
};
/*
-----------------------------------------------------------------------------
@@ -339,6 +364,139 @@ void vsp1_dl_body_write(struct vsp1_dl_body *dlb, u32
reg, u32 data)
}
/*
-----------------------------------------------------------------------------
+ * Display List Extended Command Management
+ */
+
+enum vsp1_extcmd_type {
+ VSP1_EXTCMD_AUTODISP,
+ VSP1_EXTCMD_AUTOFLD,
+};
+
+struct vsp1_extended_command_info {
+ u16 opcode;
+ size_t body_size;
+} vsp1_extended_commands[] = {
+ [VSP1_EXTCMD_AUTODISP] = { 0x02, 96 },
+ [VSP1_EXTCMD_AUTOFLD] = { 0x03, 160 },
+};
+
+/**
+ * vsp1_dl_cmd_pool_create - Create a pool of commands from a single allocation
+ * @vsp1: The VSP1 device
+ * @type: The command pool type
+ * @num_commands: The quantity of commands to allocate
+ *
+ * Allocate a pool of commands each with enough memory to contain the private
+ * data of each command. The allocation sizes are dependent upon the command
+ * type.
+ *
+ * Return a pointer to a pool on success or NULL if memory can't be allocated.
+ */
+struct vsp1_dl_cmd_pool *
+vsp1_dl_cmd_pool_create(struct vsp1_device *vsp1, enum vsp1_extcmd_type type,
+ unsigned int num_cmds)
+{
+ struct vsp1_dl_cmd_pool *pool;
+ unsigned int i;
+ size_t cmd_size;
+
+ pool = kzalloc(sizeof(*pool), GFP_KERNEL);
+ if (!pool)
+ return NULL;
+
+ pool->cmds = kcalloc(num_cmds, sizeof(*pool->cmds), GFP_KERNEL);
+ if (!pool->cmds) {
+ kfree(pool);
+ return NULL;
+ }
+
+ cmd_size = sizeof(struct vsp1_dl_ext_cmd_header) +
+ vsp1_extended_commands[type].body_size;
+ cmd_size = ALIGN(cmd_size, 16);
+
+ pool->size = cmd_size * num_cmds;
+ pool->mem = dma_alloc_wc(vsp1->bus_master, pool->size, &pool->dma,
+ GFP_KERNEL);
+ if (!pool->mem) {
+ kfree(pool->cmds);
+ kfree(pool);
+ return NULL;
+ }
+
+ spin_lock_init(&pool->lock);
+ INIT_LIST_HEAD(&pool->free);
+
+ for (i = 0; i < num_cmds; ++i) {
+ struct vsp1_dl_ext_cmd *cmd = &pool->cmds[i];
+ size_t cmd_offset = i * cmd_size;
+ size_t data_offset = sizeof(struct vsp1_dl_ext_cmd_header) +
+ cmd_offset;
+
+ cmd->pool = pool;
+ cmd->cmd_opcode = vsp1_extended_commands[type].opcode;
+
+ /* TODO: Auto-disp can utilise more than one command per cmd */
+ cmd->num_cmds = 1;
+ cmd->cmds = pool->mem + cmd_offset;
+ cmd->cmd_dma = pool->dma + cmd_offset;
+
+ cmd->data = pool->mem + data_offset;
+ cmd->data_dma = pool->dma + data_offset;
+ cmd->data_size = vsp1_extended_commands[type].body_size;
+
+ list_add_tail(&cmd->free, &pool->free);
+ }
+
+ return pool;
+}
+
+struct vsp1_dl_ext_cmd *vsp1_dl_ext_cmd_get(struct vsp1_dl_cmd_pool *pool)
+{
+ struct vsp1_dl_ext_cmd *cmd = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pool->lock, flags);
+
+ if (!list_empty(&pool->free)) {
+ cmd = list_first_entry(&pool->free, struct vsp1_dl_ext_cmd,
+ free);
+ list_del(&cmd->free);
+ }
+
+ spin_unlock_irqrestore(&pool->lock, flags);
+
+ return cmd;
+}
+
+void vsp1_dl_ext_cmd_put(struct vsp1_dl_ext_cmd *cmd)
+{
+ unsigned long flags;
+
+ if (!cmd)
+ return;
+
+ /* Reset flags, these mark data usage */
+ cmd->flags = 0;
+
+ spin_lock_irqsave(&cmd->pool->lock, flags);
+ list_add_tail(&cmd->free, &cmd->pool->free);
+ spin_unlock_irqrestore(&cmd->pool->lock, flags);
+}
+
+void vsp1_dl_ext_cmd_pool_destroy(struct vsp1_dl_cmd_pool *pool)
+{
+ if (!pool)
+ return;
+
+ if (pool->mem)
+ dma_free_wc(pool->vsp1->bus_master, pool->size, pool->mem,
+ pool->dma);
+
+ kfree(pool->cmds);
+ kfree(pool);
+}
+
+/* ----------------------------------------------------------------------------
* Display List Transaction Management
*/
@@ -442,6 +600,12 @@ static void __vsp1_dl_list_put(struct vsp1_dl_list *dl)
vsp1_dl_list_bodies_put(dl);
+ vsp1_dl_ext_cmd_put(dl->pre_cmd);
+ vsp1_dl_ext_cmd_put(dl->post_cmd);
+
+ dl->pre_cmd = NULL;
+ dl->post_cmd = NULL;
+
/*
* body0 is reused as as an optimisation as presently every display list
* has at least one body, thus we reinitialise the entries list
@@ -863,6 +1027,15 @@ struct vsp1_dl_manager *vsp1_dlm_create(struct
vsp1_device *vsp1,
list_add_tail(&dl->list, &dlm->free);
}
+ if (vsp1_feature(vsp1, VSP1_HAS_EXT_DL)) {
+ dlm->autfld_cmds = vsp1_dl_cmd_pool_create(vsp1,
+ VSP1_EXTCMD_AUTOFLD, prealloc);
+ if (!dlm->autfld_cmds) {
+ vsp1_dlm_destroy(dlm);
+ return NULL;
+ }
+ }
+
return dlm;
}
@@ -879,4 +1052,20 @@ void vsp1_dlm_destroy(struct vsp1_dl_manager *dlm)
}
vsp1_dl_body_pool_destroy(dlm->pool);
+ vsp1_dl_ext_cmd_pool_destroy(dlm->autfld_cmds);
+}
+
+struct vsp1_dl_ext_cmd *vsp1_dlm_get_autofld_cmd(struct vsp1_dl_list *dl)
+{
+ struct vsp1_dl_manager *dlm = dl->dlm;
+ struct vsp1_dl_ext_cmd *cmd;
+
+ if (dl->pre_cmd)
+ return dl->pre_cmd;
+
+ cmd = vsp1_dl_ext_cmd_get(dlm->autfld_cmds);
+ if (cmd)
+ dl->pre_cmd = cmd;
+
+ return cmd;
}
diff --git a/drivers/media/platform/vsp1/vsp1_dl.h
b/drivers/media/platform/vsp1/vsp1_dl.h
index 4898b21dc840..3009912ddefb 100644
--- a/drivers/media/platform/vsp1/vsp1_dl.h
+++ b/drivers/media/platform/vsp1/vsp1_dl.h
@@ -23,6 +23,7 @@ struct vsp1_dl_manager;
/**
* struct vsp1_dl_ext_cmd - Extended Display command
+ * @pool: pool to which this command belongs
* @free: entry in the pool of free commands list
* @cmd_opcode: command type opcode
* @flags: flags used by the command
@@ -34,6 +35,7 @@ struct vsp1_dl_manager;
* @data_size: size of the @data_dma memory in bytes
*/
struct vsp1_dl_ext_cmd {
+ struct vsp1_dl_cmd_pool *pool;
struct list_head free;
u8 cmd_opcode;
@@ -56,6 +58,7 @@ struct vsp1_dl_manager *vsp1_dlm_create(struct vsp1_device
*vsp1,
void vsp1_dlm_destroy(struct vsp1_dl_manager *dlm);
void vsp1_dlm_reset(struct vsp1_dl_manager *dlm);
bool vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm);
+struct vsp1_dl_ext_cmd *vsp1_dlm_get_autofld_cmd(struct vsp1_dl_list *dl);
struct vsp1_dl_list *vsp1_dl_list_get(struct vsp1_dl_manager *dlm);
void vsp1_dl_list_put(struct vsp1_dl_list *dl);
--
git-series 0.9.1
