| Message ID | 20220208044644.359951-3-colin.foster@in-advantage.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | use bulk reads for ocelot statistics | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/subject_prefix | success | Link |
| netdev/cover_letter | success | Series has a cover letter |
| netdev/patch_count | success | Link |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/cc_maintainers | success | CCed 7 of 7 maintainers |
| netdev/build_clang | success | Errors and warnings before: 0 this patch: 0 |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 36 lines checked |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
On Mon, Feb 07, 2022 at 08:46:43PM -0800, Colin Foster wrote: > Regmap supports bulk register reads. Ocelot does not. This patch adds > support for Ocelot to invoke bulk regmap reads. That will allow any driver > that performs consecutive reads over memory regions to optimize that > access. > > Signed-off-by: Colin Foster <colin.foster@in-advantage.com> > --- Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
diff --git a/drivers/net/ethernet/mscc/ocelot_io.c b/drivers/net/ethernet/mscc/ocelot_io.c index 7390fa3980ec..2067382d0ee1 100644 --- a/drivers/net/ethernet/mscc/ocelot_io.c +++ b/drivers/net/ethernet/mscc/ocelot_io.c @@ -10,6 +10,19 @@ #include "ocelot.h" +int __ocelot_bulk_read_ix(struct ocelot *ocelot, u32 reg, u32 offset, void *buf, + int count) +{ + u16 target = reg >> TARGET_OFFSET; + + WARN_ON(!target); + + return regmap_bulk_read(ocelot->targets[target], + ocelot->map[target][reg & REG_MASK] + offset, + buf, count); +} +EXPORT_SYMBOL_GPL(__ocelot_bulk_read_ix); + u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset) { u16 target = reg >> TARGET_OFFSET; diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h index 14a6f4de8e1f..312b72558659 100644 --- a/include/soc/mscc/ocelot.h +++ b/include/soc/mscc/ocelot.h @@ -744,6 +744,9 @@ struct ocelot_policer { u32 burst; /* bytes */ }; +#define ocelot_bulk_read_rix(ocelot, reg, ri, buf, count) \ + __ocelot_bulk_read_ix(ocelot, reg, reg##_RSZ * (ri), buf, count) + #define ocelot_read_ix(ocelot, reg, gi, ri) \ __ocelot_read_ix(ocelot, reg, reg##_GSZ * (gi) + reg##_RSZ * (ri)) #define ocelot_read_gix(ocelot, reg, gi) \ @@ -800,6 +803,8 @@ struct ocelot_policer { u32 ocelot_port_readl(struct ocelot_port *port, u32 reg); void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg); void ocelot_port_rmwl(struct ocelot_port *port, u32 val, u32 mask, u32 reg); +int __ocelot_bulk_read_ix(struct ocelot *ocelot, u32 reg, u32 offset, void *buf, + int count); u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset); void __ocelot_write_ix(struct ocelot *ocelot, u32 val, u32 reg, u32 offset); void __ocelot_rmw_ix(struct ocelot *ocelot, u32 val, u32 mask, u32 reg,
Regmap supports bulk register reads. Ocelot does not. This patch adds support for Ocelot to invoke bulk regmap reads. That will allow any driver that performs consecutive reads over memory regions to optimize that access. Signed-off-by: Colin Foster <colin.foster@in-advantage.com> --- drivers/net/ethernet/mscc/ocelot_io.c | 13 +++++++++++++ include/soc/mscc/ocelot.h | 5 +++++ 2 files changed, 18 insertions(+)