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 convenient re-usable command objects for the entities to utilise.
Signed-off-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com
---
v2: - Fix spelling typo in commit message - constify, and staticify the instantiation of vsp1_extended_commands - s/autfld_cmds/autofld_cmds/ - staticify cmd pool functions (Thanks kbuild-bot) --- drivers/media/platform/vsp1/vsp1_dl.c | 191 +++++++++++++++++++++++++++- drivers/media/platform/vsp1/vsp1_dl.h | 3 +- 2 files changed, 194 insertions(+)
diff --git a/drivers/media/platform/vsp1/vsp1_dl.c b/drivers/media/platform/vsp1/vsp1_dl.c index b64d32535edc..d33ae5f125bd 100644 --- a/drivers/media/platform/vsp1/vsp1_dl.c +++ b/drivers/media/platform/vsp1/vsp1_dl.c @@ -117,6 +117,30 @@ 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 @@ -162,6 +186,7 @@ struct vsp1_dl_list { * @queued: list queued to the hardware (written to the DL registers) * @pending: list waiting to be queued to the hardware * @pool: body pool for the display list bodies + * @autofld_cmds: command pool to support auto-fld interlaced mode */ struct vsp1_dl_manager { unsigned int index; @@ -175,6 +200,7 @@ struct vsp1_dl_manager { struct vsp1_dl_list *pending;
struct vsp1_dl_body_pool *pool; + struct vsp1_dl_cmd_pool *autofld_cmds; };
/* ----------------------------------------------------------------------------- @@ -338,6 +364,140 @@ 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; +} static const 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. + */ +static 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; +} + +static +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; +} + +static 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); +} + +static 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 */
@@ -440,6 +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. @@ -883,6 +1049,15 @@ 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->autofld_cmds = vsp1_dl_cmd_pool_create(vsp1, + VSP1_EXTCMD_AUTOFLD, prealloc); + if (!dlm->autofld_cmds) { + vsp1_dlm_destroy(dlm); + return NULL; + } + } + return dlm; }
@@ -899,4 +1074,20 @@ void vsp1_dlm_destroy(struct vsp1_dl_manager *dlm) }
vsp1_dl_body_pool_destroy(dlm->pool); + vsp1_dl_ext_cmd_pool_destroy(dlm->autofld_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->autofld_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 aa5f4adc6617..d9621207b093 100644 --- a/drivers/media/platform/vsp1/vsp1_dl.h +++ b/drivers/media/platform/vsp1/vsp1_dl.h @@ -22,6 +22,7 @@ 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 @@ -33,6 +34,7 @@ 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; @@ -55,6 +57,7 @@ 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); unsigned int 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);