/** * struct ring_desc - TX/RX ring entry * * For TX set length/eof/sof. * For RX length/eof/sof are set by the NHI.
*/ struct ring_desc {
u64 phys;
u32 length:12;
u32 eof:4;
u32 sof:4; enum ring_desc_flags flags:12;
u32 time; /* write zero */
} __packed;
/* NHI registers in bar 0 */
/* * 16 bytes per entry, one entry for every hop (REG_CAPS) * 00: physical pointer to an array of struct ring_desc * 08: ring tail (set by NHI) * 10: ring head (index of first non posted descriptor) * 12: descriptor count
*/ #define REG_TX_RING_BASE 0x00000
/* * 16 bytes per entry, one entry for every hop (REG_CAPS) * 00: physical pointer to an array of struct ring_desc * 08: ring head (index of first not posted descriptor) * 10: ring tail (set by NHI) * 12: descriptor count * 14: max frame sizes (anything larger than 0x100 has no effect)
*/ #define REG_RX_RING_BASE 0x08000
/* * 32 bytes per entry, one entry for every hop (REG_CAPS) * 00: enum_ring_flags * 04: isoch time stamp ?? (write 0) * ..: unknown
*/ #define REG_TX_OPTIONS_BASE 0x19800
/* * 32 bytes per entry, one entry for every hop (REG_CAPS) * 00: enum ring_flags * If RING_FLAG_E2E_FLOW_CONTROL is set then bits 13-23 must be set to * the corresponding TX hop id. * 04: EOF/SOF mask (ignored for RING_FLAG_RAW rings) * ..: unknown
*/ #define REG_RX_OPTIONS_BASE 0x29800 #define REG_RX_OPTIONS_E2E_HOP_MASK GENMASK(22, 12) #define REG_RX_OPTIONS_E2E_HOP_SHIFT 12
/* * three bitfields: tx, rx, rx overflow * Every bitfield contains one bit for every hop (REG_CAPS). * New interrupts are fired only after ALL registers have been * read (even those containing only disabled rings).
*/ #define REG_RING_NOTIFY_BASE 0x37800 #define RING_NOTIFY_REG_COUNT(nhi) ((31 + 3 * nhi->hop_count) / 32) #define REG_RING_INT_CLEAR 0x37808
/* * two bitfields: rx, tx * Both bitfields contains one bit for every hop (REG_CAPS). To * enable/disable interrupts set/clear the corresponding bits.
*/ #define REG_RING_INTERRUPT_BASE 0x38200 #define RING_INTERRUPT_REG_COUNT(nhi) ((31 + 2 * nhi->hop_count) / 32)
/* The last 11 bits contain the number of hops supported by the NHI port. */ #define REG_CAPS 0x39640 #define REG_CAPS_VERSION_MASK GENMASK(23, 16) #define REG_CAPS_VERSION_2 0x40
/** * enum icl_lc_mailbox_cmd - ICL specific LC mailbox commands * @ICL_LC_GO2SX: Ask LC to enter Sx without wake * @ICL_LC_GO2SX_NO_WAKE: Ask LC to enter Sx with wake * @ICL_LC_PREPARE_FOR_RESET: Prepare LC for reset
*/ enum icl_lc_mailbox_cmd {
ICL_LC_GO2SX = 0x02,
ICL_LC_GO2SX_NO_WAKE = 0x03,
ICL_LC_PREPARE_FOR_RESET = 0x21,
};
#endif
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