kernel/linux.git/drivers/net/ipa/gsi.c, branch v6.6.134

net: ipa: add HW_PARAM_4 GSI register

2023-02-20T07:14:20+00:00

Starting at IPA v5.0, the number of event rings per EE is defined in a field in a new HW_PARAM_4 GSI register rather than HW_PARAM_2. Define this new register and its fields, and update the code that checks the number of rings supported by hardware to use the proper field based on IPA version. Signed-off-by: Alex Elder Signed-off-by: Paolo Abeni

net: ipa: support different event ring encoding

2023-02-20T07:14:20+00:00

Starting with IPA v5.0, a channel's event ring index is encoded in a field in the CH_C_CNTXT_1 GSI register rather than CH_C_CNTXT_0. Define a new field ID for the former register and encode the event ring in the appropriate register. Signed-off-by: Alex Elder Signed-off-by: Paolo Abeni

net: ipa: avoid setting an undefined field

2023-02-20T07:14:20+00:00

The GSI channel protocol field in the CH_C_CNTXT_0 GSI register is widened starting IPA v5.0, making the CHTYPE_PROTOCOL_MSB field added in IPA v4.5 unnecessary. Update the code to reflect this. Signed-off-by: Alex Elder Signed-off-by: Paolo Abeni

net: ipa: kill ev_ch_e_cntxt_1_length_encode()

2023-02-20T07:14:20+00:00

Now that we explicitly define each register field width there is no need to have a special encoding function for the event ring length. Add a field for this to the EV_CH_E_CNTXT_1 GSI register, and use it in place of ev_ch_e_cntxt_1_length_encode() (which can be removed). Signed-off-by: Alex Elder Signed-off-by: Paolo Abeni

net: ipa: kill gsi->virt_raw

2023-02-20T07:14:20+00:00

Starting at IPA v4.5, almost all GSI registers had their offsets changed by a fixed amount (shifted downward by 0xd000). Rather than defining offsets for all those registers dependent on version, an adjustment was applied for most register accesses. This was implemented in commit cdeee49f3ef7f ("net: ipa: adjust GSI register addresses"). It was later modified to be a bit more obvious about the adjusment, in commit 571b1e7e58ad3 ("net: ipa: use a separate pointer for adjusted GSI memory"). We now are able to define every GSI register with its own offset, so there's no need to implement this special adjustment. So get rid of the "virt_raw" pointer, and just maintain "virt" as the (non-adjusted) base address of I/O mapped GSI register memory. Redefine the offsets of all GSI registers (other than the INTER_EE ones, which were not subject to the adjustment) for IPA v4.5+, subtracting 0xd000 from their defined offsets instead. Move the ERROR_LOG and ERROR_LOG_CLR definitions further down in the register definition files so all registers are defined in order of their offset. Signed-off-by: Alex Elder Signed-off-by: Paolo Abeni

net: ipa: fix an incorrect assignment

2023-02-20T07:14:20+00:00

I spotted an error in a patch posted this week, unfortunately just after it got accepted. The effect of the bug is that time-based interrupt moderation is disabled. This is not technically a bug, but it is not what is intended. The problem is that a |= assignment got implemented as a simple assignment, so the previously assigned value was ignored. Fixes: edc6158b18af ("net: ipa: define fields for event-ring related registers") Signed-off-by: Alex Elder Signed-off-by: Paolo Abeni

net: ipa: define fields for remaining GSI registers

2023-02-15T04:39:39+00:00

Define field IDs for the remaining GSI registers, and populate the register definition files accordingly. Use the reg_*() functions to access field values for those regiters, and get rid of the previous field definition constants. Signed-off-by: Alex Elder Signed-off-by: Jakub Kicinski

net: ipa: define fields for event-ring related registers

2023-02-15T04:39:38+00:00

Define field IDs for the EV_CH_E_CNTXT_0 and EV_CH_E_CNTXT_8 GSI registers, and populate the register definition files accordingly. Use the reg_*() functions to access field values for those regiters, and get rid of the previous field definition constants. The remaining EV_CH_E_CNTXT_* registers are written with full 32-bit values (and have no fields). Signed-off-by: Alex Elder Signed-off-by: Jakub Kicinski

net: ipa: define more fields for GSI registers

2023-02-15T04:39:38+00:00

Beyond the CH_C_QOS register, two other registers whose offset is related to channel number have fields within them. Define the fields within the CH_C_CNTXT_0 GSI register, using an enumerated type to identify the register's fields, and define an array of field masks to use for that register's reg structure. For the CH_C_CNTXT_1 GSI register, ch_c_cntxt_1_length_encode() previously hid the difference in bit width in the channel ring length field. Instead, define a new field CH_R_LENGTH and encode the ring size with reg_encode(). Signed-off-by: Alex Elder Signed-off-by: Jakub Kicinski

net: ipa: define GSI CH_C_QOS register fields

2023-02-15T04:39:38+00:00

Define the fields within the CH_C_QOS GSI register using an array of field masks in that register's reg structure. Use the reg functions for encoding values in those fields. One field in the register is present for IPA v4.0-4.2 only, two others are present starting at IPA v4.5, and one more is there starting at IPA v4.9. Drop the "GSI_" prefix in symbols defined in the gsi_prefetch_mode enumerated type, and define their values using decimal rather than hexidecimal values. Signed-off-by: Alex Elder Signed-off-by: Jakub Kicinski