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net: ipa: GSI register cleanup
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Move some static inline function definitions out of "gsi_reg.h" and
into "gsi.c", which is the only place they're used.  Rename them so
their names identify the register they're associated with.

Move the gsi_channel_type enumerated type definition below the
offset and field definitions for the CH_C_CNTXT_0 register where
it's used.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Alex Elder authored and David S. Miller committed Feb 10, 2023
1 parent c5ebba7 commit 0ec573e
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Showing 2 changed files with 50 additions and 47 deletions.
41 changes: 38 additions & 3 deletions drivers/net/ipa/gsi.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -182,6 +182,41 @@ static bool gsi_channel_initialized(struct gsi_channel *channel)
return !!channel->gsi;
}

/* Encode the channel protocol for the CH_C_CNTXT_0 register */
static u32 ch_c_cntxt_0_type_encode(enum ipa_version version,
enum gsi_channel_type type)
{
u32 val;

val = u32_encode_bits(type, CHTYPE_PROTOCOL_FMASK);
if (version < IPA_VERSION_4_5)
return val;

type >>= hweight32(CHTYPE_PROTOCOL_FMASK);

return val | u32_encode_bits(type, CHTYPE_PROTOCOL_MSB_FMASK);
}

/* Encode a channel ring buffer length for the CH_C_CNTXT_1 register */
static u32 ch_c_cntxt_1_length_encode(enum ipa_version version, u32 length)
{
if (version < IPA_VERSION_4_9)
return u32_encode_bits(length, GENMASK(15, 0));

return u32_encode_bits(length, GENMASK(19, 0));
}

/* Encode the length of the event channel ring buffer for the
* EV_CH_E_CNTXT_1 register.
*/
static u32 ev_ch_e_cntxt_1_length_encode(enum ipa_version version, u32 length)
{
if (version < IPA_VERSION_4_9)
return u32_encode_bits(length, GENMASK(15, 0));

return u32_encode_bits(length, GENMASK(19, 0));
}

/* Update the GSI IRQ type register with the cached value */
static void gsi_irq_type_update(struct gsi *gsi, u32 val)
{
Expand Down Expand Up @@ -676,7 +711,7 @@ static void gsi_evt_ring_program(struct gsi *gsi, u32 evt_ring_id)
iowrite32(val, gsi->virt + GSI_EV_CH_E_CNTXT_0_OFFSET(evt_ring_id));

size = ring->count * GSI_RING_ELEMENT_SIZE;
val = ev_r_length_encoded(gsi->version, size);
val = ev_ch_e_cntxt_1_length_encode(gsi->version, size);
iowrite32(val, gsi->virt + GSI_EV_CH_E_CNTXT_1_OFFSET(evt_ring_id));

/* The context 2 and 3 registers store the low-order and
Expand Down Expand Up @@ -765,14 +800,14 @@ static void gsi_channel_program(struct gsi_channel *channel, bool doorbell)
u32 val;

/* We program all channels as GPI type/protocol */
val = chtype_protocol_encoded(gsi->version, GSI_CHANNEL_TYPE_GPI);
val = ch_c_cntxt_0_type_encode(gsi->version, GSI_CHANNEL_TYPE_GPI);
if (channel->toward_ipa)
val |= CHTYPE_DIR_FMASK;
val |= u32_encode_bits(channel->evt_ring_id, ERINDEX_FMASK);
val |= u32_encode_bits(GSI_RING_ELEMENT_SIZE, ELEMENT_SIZE_FMASK);
iowrite32(val, gsi->virt + GSI_CH_C_CNTXT_0_OFFSET(channel_id));

val = r_length_encoded(gsi->version, size);
val = ch_c_cntxt_1_length_encode(gsi->version, size);
iowrite32(val, gsi->virt + GSI_CH_C_CNTXT_1_OFFSET(channel_id));

/* The context 2 and 3 registers store the low-order and
Expand Down
56 changes: 12 additions & 44 deletions drivers/net/ipa/gsi_reg.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,18 @@

/* All other register offsets are relative to gsi->virt */

#define GSI_CH_C_CNTXT_0_OFFSET(ch) \
(0x0001c000 + 0x4000 * GSI_EE_AP + 0x80 * (ch))
#define CHTYPE_PROTOCOL_FMASK GENMASK(2, 0)
#define CHTYPE_DIR_FMASK GENMASK(3, 3)
#define EE_FMASK GENMASK(7, 4)
#define CHID_FMASK GENMASK(12, 8)
/* The next field is present for IPA v4.5 and above */
#define CHTYPE_PROTOCOL_MSB_FMASK GENMASK(13, 13)
#define ERINDEX_FMASK GENMASK(18, 14)
#define CHSTATE_FMASK GENMASK(23, 20)
#define ELEMENT_SIZE_FMASK GENMASK(31, 24)

/** enum gsi_channel_type - CHTYPE_PROTOCOL field values in CH_C_CNTXT_0 */
enum gsi_channel_type {
GSI_CHANNEL_TYPE_MHI = 0x0,
Expand All @@ -76,46 +88,9 @@ enum gsi_channel_type {
GSI_CHANNEL_TYPE_11AD = 0x9,
};

#define GSI_CH_C_CNTXT_0_OFFSET(ch) \
(0x0001c000 + 0x4000 * GSI_EE_AP + 0x80 * (ch))
#define CHTYPE_PROTOCOL_FMASK GENMASK(2, 0)
#define CHTYPE_DIR_FMASK GENMASK(3, 3)
#define EE_FMASK GENMASK(7, 4)
#define CHID_FMASK GENMASK(12, 8)
/* The next field is present for IPA v4.5 and above */
#define CHTYPE_PROTOCOL_MSB_FMASK GENMASK(13, 13)
#define ERINDEX_FMASK GENMASK(18, 14)
#define CHSTATE_FMASK GENMASK(23, 20)
#define ELEMENT_SIZE_FMASK GENMASK(31, 24)

/* Encoded value for CH_C_CNTXT_0 register channel protocol fields */
static inline u32
chtype_protocol_encoded(enum ipa_version version, enum gsi_channel_type type)
{
u32 val;

val = u32_encode_bits(type, CHTYPE_PROTOCOL_FMASK);
if (version < IPA_VERSION_4_5)
return val;

/* Encode upper bit(s) as well */
type >>= hweight32(CHTYPE_PROTOCOL_FMASK);
val |= u32_encode_bits(type, CHTYPE_PROTOCOL_MSB_FMASK);

return val;
}

#define GSI_CH_C_CNTXT_1_OFFSET(ch) \
(0x0001c004 + 0x4000 * GSI_EE_AP + 0x80 * (ch))

/* Encoded value for CH_C_CNTXT_1 register R_LENGTH field */
static inline u32 r_length_encoded(enum ipa_version version, u32 length)
{
if (version < IPA_VERSION_4_9)
return u32_encode_bits(length, GENMASK(15, 0));
return u32_encode_bits(length, GENMASK(19, 0));
}

#define GSI_CH_C_CNTXT_2_OFFSET(ch) \
(0x0001c008 + 0x4000 * GSI_EE_AP + 0x80 * (ch))

Expand Down Expand Up @@ -167,13 +142,6 @@ enum gsi_prefetch_mode {

#define GSI_EV_CH_E_CNTXT_1_OFFSET(ev) \
(0x0001d004 + 0x4000 * GSI_EE_AP + 0x80 * (ev))
/* Encoded value for EV_CH_C_CNTXT_1 register EV_R_LENGTH field */
static inline u32 ev_r_length_encoded(enum ipa_version version, u32 length)
{
if (version < IPA_VERSION_4_9)
return u32_encode_bits(length, GENMASK(15, 0));
return u32_encode_bits(length, GENMASK(19, 0));
}

#define GSI_EV_CH_E_CNTXT_2_OFFSET(ev) \
(0x0001d008 + 0x4000 * GSI_EE_AP + 0x80 * (ev))
Expand Down

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