Hi,
On Tue, Aug 23, 2022 at 05:04:23PM +0800, Szuying Chen wrote:
> From: Szuying Chen <Chloe_Chen@xxxxxxxxxxxxxx>
>
> The patch depends on patch 1/2. Add nvm specific operations for ASMedia.
> And add tb_switch_nvm_upgradable() of enable firmware upgrade.
Again the $subject and please call it NVM (capital letters) everywhere.
>
> Signed-off-by: Szuying Chen <Chloe_Chen@xxxxxxxxxxxxxx>
> ---
> drivers/thunderbolt/nvm.c | 46 ++++++++++++++++++++++++++++++++++++
> drivers/thunderbolt/switch.c | 3 +++
> drivers/thunderbolt/tb.h | 2 ++
> 3 files changed, 51 insertions(+)
>
> diff --git a/drivers/thunderbolt/nvm.c b/drivers/thunderbolt/nvm.c
> index 5c7c2a284497..d2ef22f8b19b 100644
> --- a/drivers/thunderbolt/nvm.c
> +++ b/drivers/thunderbolt/nvm.c
> @@ -15,6 +15,9 @@
> /* Switch NVM support */
> #define NVM_CSS 0x10
>
> +/* ASMedia specific NVM offsets */
> +#define ASMEDIA_NVM_VERSION 0x1c
> +
> static DEFINE_IDA(nvm_ida);
>
> static inline int nvm_read(struct tb_switch *sw, unsigned int address,
> @@ -116,11 +119,39 @@ static int intel_nvm_validate(struct tb_switch *sw)
> return image_size;
> }
>
> +static int asmedia_nvm_version(struct tb_switch *sw)
> +{
> + struct tb_nvm *nvm = sw->nvm;
> + u64 val;
> + int ret;
> +
> + ret = nvm_read(sw, ASMEDIA_NVM_VERSION, &val, sizeof(val));
> + if (ret)
> + return ret;
> +
> + /* ASMedia NVM version show format include Firmware version and date xxxxxx.xxxxxx */
> + nvm->major = (((u8)val >> 0x18) << 0x10 | ((u8)(val >> 0x20)) << 0x8 | (u8)(val >> 0x28));
> + nvm->minor = (((u8)val) << 0x10 | ((u8)(val >> 0x8)) << 0x8 | (u8)(val >> 0x10));
Can you use some helperes to make this look nicer?
> + nvm->nvm_size = SZ_512K;
Some explanation perhaps why 512K? Is it always the case even for the
future NVMs? Can it be read somewhere?
> +
> + return 0;
> +}
> +
> +static void tb_switch_set_nvm_upgrade(struct tb_switch *sw)
> +{
> + sw->no_nvm_upgrade = false;
> +}
> +
> struct tb_nvm_vendor_ops intel_switch_nvm_ops = {
> .version = intel_nvm_version,
> .validate = intel_nvm_validate,
> };
>
> +struct tb_nvm_vendor_ops asmedia_switch_nvm_ops = {
const
> + .nvm_upgrade = tb_switch_set_nvm_upgrade,
> + .version = asmedia_nvm_version,
> +};
> +
> struct switch_nvm_vendor {
> u16 vendor;
> const struct tb_nvm_vendor_ops *vops;
> @@ -129,8 +160,23 @@ struct switch_nvm_vendor {
> static const struct switch_nvm_vendor switch_nvm_vendors[] = {
> { 0x8086, &intel_switch_nvm_ops },
> { 0x8087, &intel_switch_nvm_ops },
> + { 0x174c, &asmedia_switch_nvm_ops },
Ordering, I commented this already last time :(
> };
>
If you export it outside of this file, please write kernel-doc.
> +void tb_switch_nvm_upgradable(struct tb_switch *sw)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(switch_nvm_vendors); i++) {
> + const struct switch_nvm_vendor *v = &switch_nvm_vendors[i];
> +
> + if (v->vendor == sw->config.vendor_id) {
> + if (v->vops->nvm_upgrade)
> + v->vops->nvm_upgrade(sw);
> + }
> + }
> +}
> +
> /**
> * tb_switch_nvm_alloc() - alloc nvm and set nvm->vops to point
> * the vendor specific operations.
> diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
> index d257219cb66e..23df70290ca2 100644
> --- a/drivers/thunderbolt/switch.c
> +++ b/drivers/thunderbolt/switch.c
> @@ -2829,6 +2829,9 @@ int tb_switch_add(struct tb_switch *sw)
> return ret;
> }
>
> + /* Enable the NVM firmware upgrade for specific vendors */
> + tb_switch_nvm_upgradable(sw);
> +
> ret = device_add(&sw->dev);
> if (ret) {
> dev_err(&sw->dev, "failed to add device: %d\n", ret);
> diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
> index 73ae2e093a92..8e2887e9c669 100644
> --- a/drivers/thunderbolt/tb.h
> +++ b/drivers/thunderbolt/tb.h
> @@ -75,6 +75,7 @@ enum tb_nvm_write_ops {
> struct tb_nvm_vendor_ops {
> int (*version)(struct tb_switch *sw);
> int (*validate)(struct tb_switch *sw);
> + void (*nvm_upgrade)(struct tb_switch *sw);
Kernel-doc for this too, well and the rest.
> };
>
> #define TB_SWITCH_KEY_SIZE 32
> @@ -748,6 +749,7 @@ static inline void tb_domain_put(struct tb *tb)
> put_device(&tb->dev);
> }
>
> +void tb_switch_nvm_upgradable(struct tb_switch *sw);
Same comment about the location. Also is it "upgradeable"?
> struct tb_nvm *tb_switch_nvm_alloc(struct tb_switch *sw);
> struct tb_nvm *tb_nvm_alloc(struct device *dev);
> int tb_nvm_add_active(struct tb_nvm *nvm, size_t size, nvmem_reg_read_t reg_read);
> --
> 2.34.1
