[U-Boot] [PATCH 1/4] x86: qemu: re-structure qemu_fwcfg_list_firmware()
Bin Meng
bmeng.cn at gmail.com
Sat Jan 16 14:23:46 CET 2016
Hi Miao,
On Fri, Jan 15, 2016 at 11:12 AM, Miao Yan <yanmiaobest at gmail.com> wrote:
> Re-write the logic in qemu_fwcfg_list_firmware(), add a function
> qemu_cfg_read_firmware_list() to handle reading firmware list.
qemu_fwcfg_read_firmware_list()
>
> Signed-off-by: Miao Yan <yanmiaobest at gmail.com>
> ---
> arch/x86/cpu/qemu/fw_cfg.c | 60 +++++++++++++++++++++++++++++++++----------
> arch/x86/include/asm/fw_cfg.h | 8 ++++++
> 2 files changed, 54 insertions(+), 14 deletions(-)
>
> diff --git a/arch/x86/cpu/qemu/fw_cfg.c b/arch/x86/cpu/qemu/fw_cfg.c
> index 0599214..b22026c 100644
> --- a/arch/x86/cpu/qemu/fw_cfg.c
> +++ b/arch/x86/cpu/qemu/fw_cfg.c
> @@ -10,10 +10,13 @@
> #include <malloc.h>
> #include <asm/io.h>
> #include <asm/fw_cfg.h>
> +#include <linux/list.h>
>
> static bool fwcfg_present;
> static bool fwcfg_dma_present;
>
> +static LIST_HEAD(fw_list);
> +
> /* Read configuration item using fw_cfg PIO interface */
> static void qemu_fwcfg_read_entry_pio(uint16_t entry,
> uint32_t size, void *address)
> @@ -162,29 +165,58 @@ static int qemu_fwcfg_setup_kernel(void *load_addr, void *initrd_addr)
> return 0;
> }
>
> -static int qemu_fwcfg_list_firmware(void)
> +static int qemu_fwcfg_read_firmware_list(void)
> {
> int i;
> uint32_t count;
> - struct fw_cfg_files *files;
> + struct fw_file *file;
> + struct list_head *entry;
> +
> + /* don't read it twice */
> + if (!list_empty(&fw_list))
> + return 0;
>
> qemu_fwcfg_read_entry(FW_CFG_FILE_DIR, 4, &count);
> if (!count)
> return 0;
>
> count = be32_to_cpu(count);
> - files = malloc(count * sizeof(struct fw_cfg_file));
> - if (!files)
> - return -ENOMEM;
> -
> - files->count = count;
> - qemu_fwcfg_read_entry(FW_CFG_INVALID,
> - count * sizeof(struct fw_cfg_file),
> - files->files);
> -
> - for (i = 0; i < files->count; i++)
> - printf("%-56s\n", files->files[i].name);
> - free(files);
> + for (i = 0; i < count; i++) {
> + file = malloc(sizeof(*file));
> + if (!file) {
> + printf("error: allocating resource\n");
> + goto err;
> + }
> + qemu_fwcfg_read_entry(FW_CFG_INVALID,
> + sizeof(struct fw_cfg_file), &file->cfg);
> + file->addr = 0;
> + list_add_tail(&file->list, &fw_list);
> + }
nits: leave one blank line before return
> + return 0;
> +
> +err:
> + list_for_each(entry, &fw_list) {
> + file = list_entry(entry, struct fw_file, list);
> + free(file);
> + }
nits: leave one blank line before return
> + return -ENOMEM;
> +}
> +
> +static int qemu_fwcfg_list_firmware(void)
> +{
> + int ret;
> + struct list_head *entry;
> + struct fw_file *file;
> +
> + /* make sure fw_list is loaded */
> + ret = qemu_fwcfg_read_firmware_list();
> + if (ret)
> + return ret;
> +
> + list_for_each(entry, &fw_list) {
> + file = list_entry(entry, struct fw_file, list);
> + printf("%-56s\n", file->cfg.name);
> + }
nits: leave one blank line before return
> return 0;
> }
>
> diff --git a/arch/x86/include/asm/fw_cfg.h b/arch/x86/include/asm/fw_cfg.h
> index fb110fa..285d805 100644
> --- a/arch/x86/include/asm/fw_cfg.h
> +++ b/arch/x86/include/asm/fw_cfg.h
> @@ -12,6 +12,8 @@
> #define FW_DMA_PORT_LOW 0x514
> #define FW_DMA_PORT_HIGH 0x518
>
> +#include <linux/list.h>
> +
> enum qemu_fwcfg_items {
> FW_CFG_SIGNATURE = 0x00,
> FW_CFG_ID = 0x01,
> @@ -67,6 +69,12 @@ struct fw_cfg_file {
> char name[FW_CFG_MAX_FILE_PATH];
> };
>
> +struct fw_file {
> + struct fw_cfg_file cfg;
> + unsigned long addr;
> + struct list_head list;
> +};
Can you please put a comment block above to describe what is each member for?
> +
> struct fw_cfg_files {
Looks that this struct fw_cfg_files is no longer used by any codes.
Please remove this.
> __be32 count;
> struct fw_cfg_file files[];
> --
Regards,
Bin
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