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Date: Mon, 4 May 2020 11:31:31 -0700
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Alex Elder <elder@...aro.org>
Cc: davem@...emloft.net, evgreen@...omium.org, subashab@...eaurora.org,
cpratapa@...eaurora.org, agross@...nel.org, robh+dt@...nel.org,
netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 2/4] net: ipa: redefine struct ipa_mem_data
On Mon 04 May 10:58 PDT 2020, Alex Elder wrote:
> The ipa_mem_data structure type was never actually used. Instead,
> the IPA memory regions were defined using the ipa_mem structure.
>
> Redefine struct ipa_mem_data so it encapsulates the array of IPA-local
> memory region descriptors along with the count of entries in that
> array. Pass just an ipa_mem structure pointer to ipa_mem_init().
>
> Rename the ipa_mem_data[] array ipa_mem_local_data[] to emphasize
> that the memory regions it defines are IPA-local memory.
>
> Signed-off-by: Alex Elder <elder@...aro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Regards,
Bjorn
> ---
> drivers/net/ipa/ipa_data-sc7180.c | 10 +++++++---
> drivers/net/ipa/ipa_data-sdm845.c | 10 +++++++---
> drivers/net/ipa/ipa_data.h | 13 +++++--------
> drivers/net/ipa/ipa_main.c | 2 +-
> drivers/net/ipa/ipa_mem.c | 9 +++++----
> drivers/net/ipa/ipa_mem.h | 3 ++-
> 6 files changed, 27 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/net/ipa/ipa_data-sc7180.c b/drivers/net/ipa/ipa_data-sc7180.c
> index 042b5fc3c135..f97e7e4e61c1 100644
> --- a/drivers/net/ipa/ipa_data-sc7180.c
> +++ b/drivers/net/ipa/ipa_data-sc7180.c
> @@ -193,7 +193,7 @@ static const struct ipa_resource_data ipa_resource_data = {
> };
>
> /* IPA-resident memory region configuration for the SC7180 SoC. */
> -static const struct ipa_mem ipa_mem_data[] = {
> +static const struct ipa_mem ipa_mem_local_data[] = {
> [IPA_MEM_UC_SHARED] = {
> .offset = 0x0000,
> .size = 0x0080,
> @@ -296,12 +296,16 @@ static const struct ipa_mem ipa_mem_data[] = {
> },
> };
>
> +static struct ipa_mem_data ipa_mem_data = {
> + .local_count = ARRAY_SIZE(ipa_mem_local_data),
> + .local = ipa_mem_local_data,
> +};
> +
> /* Configuration data for the SC7180 SoC. */
> const struct ipa_data ipa_data_sc7180 = {
> .version = IPA_VERSION_4_2,
> .endpoint_count = ARRAY_SIZE(ipa_gsi_endpoint_data),
> .endpoint_data = ipa_gsi_endpoint_data,
> .resource_data = &ipa_resource_data,
> - .mem_count = ARRAY_SIZE(ipa_mem_data),
> - .mem_data = ipa_mem_data,
> + .mem_data = &ipa_mem_data,
> };
> diff --git a/drivers/net/ipa/ipa_data-sdm845.c b/drivers/net/ipa/ipa_data-sdm845.c
> index 0d9c36e1e806..c55507e94559 100644
> --- a/drivers/net/ipa/ipa_data-sdm845.c
> +++ b/drivers/net/ipa/ipa_data-sdm845.c
> @@ -235,7 +235,7 @@ static const struct ipa_resource_data ipa_resource_data = {
> };
>
> /* IPA-resident memory region configuration for the SDM845 SoC. */
> -static const struct ipa_mem ipa_mem_data[] = {
> +static const struct ipa_mem ipa_mem_local_data[] = {
> [IPA_MEM_UC_SHARED] = {
> .offset = 0x0000,
> .size = 0x0080,
> @@ -318,12 +318,16 @@ static const struct ipa_mem ipa_mem_data[] = {
> },
> };
>
> +static struct ipa_mem_data ipa_mem_data = {
> + .local_count = ARRAY_SIZE(ipa_mem_local_data),
> + .local = ipa_mem_local_data,
> +};
> +
> /* Configuration data for the SDM845 SoC. */
> const struct ipa_data ipa_data_sdm845 = {
> .version = IPA_VERSION_3_5_1,
> .endpoint_count = ARRAY_SIZE(ipa_gsi_endpoint_data),
> .endpoint_data = ipa_gsi_endpoint_data,
> .resource_data = &ipa_resource_data,
> - .mem_count = ARRAY_SIZE(ipa_mem_data),
> - .mem_data = ipa_mem_data,
> + .mem_data = &ipa_mem_data,
> };
> diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h
> index 7110de2de817..51d8e5a6f23a 100644
> --- a/drivers/net/ipa/ipa_data.h
> +++ b/drivers/net/ipa/ipa_data.h
> @@ -246,14 +246,12 @@ struct ipa_resource_data {
>
> /**
> * struct ipa_mem - IPA-local memory region description
> - * @offset: offset in IPA memory space to base of the region
> - * @size: size in bytes base of the region
> - * @canary_count: number of 32-bit "canary" values that precede region
> + * @local_count: number of regions defined in the local[] array
> + * @local: array of IPA-local memory region descriptors
> */
> struct ipa_mem_data {
> - u32 offset;
> - u16 size;
> - u16 canary_count;
> + u32 local_count;
> + const struct ipa_mem *local;
> };
>
> /**
> @@ -270,8 +268,7 @@ struct ipa_data {
> u32 endpoint_count; /* # entries in endpoint_data[] */
> const struct ipa_gsi_endpoint_data *endpoint_data;
> const struct ipa_resource_data *resource_data;
> - u32 mem_count; /* # entries in mem_data[] */
> - const struct ipa_mem *mem_data;
> + const struct ipa_mem_data *mem_data;
> };
>
> extern const struct ipa_data ipa_data_sdm845;
> diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
> index 28998dcce3d2..9295a9122e8e 100644
> --- a/drivers/net/ipa/ipa_main.c
> +++ b/drivers/net/ipa/ipa_main.c
> @@ -778,7 +778,7 @@ static int ipa_probe(struct platform_device *pdev)
> if (ret)
> goto err_kfree_ipa;
>
> - ret = ipa_mem_init(ipa, data->mem_count, data->mem_data);
> + ret = ipa_mem_init(ipa, data->mem_data);
> if (ret)
> goto err_reg_exit;
>
> diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c
> index 42d2c29d9f0c..fb4de2a12796 100644
> --- a/drivers/net/ipa/ipa_mem.c
> +++ b/drivers/net/ipa/ipa_mem.c
> @@ -12,6 +12,7 @@
>
> #include "ipa.h"
> #include "ipa_reg.h"
> +#include "ipa_data.h"
> #include "ipa_cmd.h"
> #include "ipa_mem.h"
> #include "ipa_data.h"
> @@ -266,15 +267,15 @@ int ipa_mem_zero_modem(struct ipa *ipa)
> }
>
> /* Perform memory region-related initialization */
> -int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem)
> +int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data)
> {
> struct device *dev = &ipa->pdev->dev;
> struct resource *res;
> int ret;
>
> - if (count > IPA_MEM_COUNT) {
> + if (mem_data->local_count > IPA_MEM_COUNT) {
> dev_err(dev, "to many memory regions (%u > %u)\n",
> - count, IPA_MEM_COUNT);
> + mem_data->local_count, IPA_MEM_COUNT);
> return -EINVAL;
> }
>
> @@ -302,7 +303,7 @@ int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem)
> ipa->mem_size = resource_size(res);
>
> /* The ipa->mem[] array is indexed by enum ipa_mem_id values */
> - ipa->mem = mem;
> + ipa->mem = mem_data->local;
>
> return 0;
> }
> diff --git a/drivers/net/ipa/ipa_mem.h b/drivers/net/ipa/ipa_mem.h
> index 065cb499ebe5..f99180f84f0d 100644
> --- a/drivers/net/ipa/ipa_mem.h
> +++ b/drivers/net/ipa/ipa_mem.h
> @@ -7,6 +7,7 @@
> #define _IPA_MEM_H_
>
> struct ipa;
> +struct ipa_mem_data;
>
> /**
> * DOC: IPA Local Memory
> @@ -84,7 +85,7 @@ void ipa_mem_teardown(struct ipa *ipa);
>
> int ipa_mem_zero_modem(struct ipa *ipa);
>
> -int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem);
> +int ipa_mem_init(struct ipa *ipa, const struct ipa_mem_data *mem_data);
> void ipa_mem_exit(struct ipa *ipa);
>
> #endif /* _IPA_MEM_H_ */
> --
> 2.20.1
>
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