Hi Andy,
On Fri, Aug 14, 2020 at 07:30:12PM +0300, Andy Shevchenko wrote:
> This constant is used in several places in the code, define it
> for better maintenance.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> drivers/media/pci/intel/ipu3/ipu3-cio2.c | 13 +++++--------
> drivers/media/pci/intel/ipu3/ipu3-cio2.h | 3 +++
> 2 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.c b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
> index c7c3692a6e72..79641c79df25 100644
> --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.c
> +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.c
> @@ -127,7 +127,7 @@ static int cio2_fbpt_init_dummy(struct cio2_device *cio2)
> * List of Pointers(LOP) contains 1024x32b pointers to 4KB page each
> * Initialize each entry to dummy_page bus base address.
> */
> - for (i = 0; i < CIO2_PAGE_SIZE / sizeof(*cio2->dummy_lop); i++)
> + for (i = 0; i < CIO2_MAX_ENTRIES; i++)
> cio2->dummy_lop[i] = cio2->dummy_page_bus_addr >> PAGE_SHIFT;
>
> return 0;
> @@ -160,8 +160,7 @@ static void cio2_fbpt_entry_init_dummy(struct cio2_device *cio2,
> unsigned int i;
>
> entry[0].first_entry.first_page_offset = 0;
> - entry[1].second_entry.num_of_pages =
> - CIO2_PAGE_SIZE / sizeof(u32) * CIO2_MAX_LOPS;
> + entry[1].second_entry.num_of_pages = CIO2_MAX_ENTRIES * CIO2_MAX_LOPS;
> entry[1].second_entry.last_page_available_bytes = CIO2_PAGE_SIZE - 1;
>
> for (i = 0; i < CIO2_MAX_LOPS; i++)
> @@ -201,7 +200,7 @@ static void cio2_fbpt_entry_init_buf(struct cio2_device *cio2,
> i = 0;
> while (remaining > 0) {
> entry->lop_page_addr = b->lop_bus_addr[i] >> PAGE_SHIFT;
> - remaining -= CIO2_PAGE_SIZE / sizeof(u32) * CIO2_PAGE_SIZE;
> + remaining -= CIO2_MAX_ENTRIES * CIO2_PAGE_SIZE;
> entry++;
> i++;
> }
> @@ -841,10 +840,8 @@ static int cio2_vb2_buf_init(struct vb2_buffer *vb)
> struct device *dev = &cio2->pci_dev->dev;
> struct cio2_buffer *b =
> container_of(vb, struct cio2_buffer, vbb.vb2_buf);
> - static const unsigned int entries_per_page =
> - CIO2_PAGE_SIZE / sizeof(u32);
> unsigned int pages = DIV_ROUND_UP(vb->planes[0].length, CIO2_PAGE_SIZE);
> - unsigned int lops = DIV_ROUND_UP(pages + 1, entries_per_page);
> + unsigned int lops = DIV_ROUND_UP(pages + 1, CIO2_MAX_ENTRIES);
> struct sg_table *sg;
> struct sg_dma_page_iter sg_iter;
> int i, j;
> @@ -878,7 +875,7 @@ static int cio2_vb2_buf_init(struct vb2_buffer *vb)
> break;
> b->lop[i][j] = sg_page_iter_dma_address(&sg_iter) >> PAGE_SHIFT;
> j++;
> - if (j == entries_per_page) {
> + if (j == CIO2_MAX_ENTRIES) {
> i++;
> j = 0;
> }
> diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.h b/drivers/media/pci/intel/ipu3/ipu3-cio2.h
> index 7caab9b8c2b9..6ee5919d913b 100644
> --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h
> +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h
> @@ -4,6 +4,8 @@
> #ifndef __IPU3_CIO2_H
> #define __IPU3_CIO2_H
>
> +#include <linux/types.h>
> +
> #define CIO2_NAME "ipu3-cio2"
> #define CIO2_DEVICE_NAME "Intel IPU3 CIO2"
> #define CIO2_ENTITY_NAME "ipu3-csi2"
> @@ -17,6 +19,7 @@
> /* 32MB = 8xFBPT_entry */
> #define CIO2_MAX_LOPS 8
> #define CIO2_MAX_BUFFERS (PAGE_SIZE / 16 / CIO2_MAX_LOPS)
> +#define CIO2_MAX_ENTRIES (PAGE_SIZE / sizeof(u32))
How about calling this CIO2_ENTRIES_PER_LOP (or CIO2_LOP_ENTRIES) instead?
>
> #define CIO2_PAD_SINK 0
> #define CIO2_PAD_SOURCE 1
--
Sakari Ailus
