xref: /freebsd/sys/contrib/alpine-hal/al_hal_pcie_interrupts.h (revision 3fc36ee018bb836bd1796067cf4ef8683f166ebc)

/*-
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#ifndef _AL_HAL_PCIE_INTERRUPTS_H_
#define _AL_HAL_PCIE_INTERRUPTS_H_

#include "al_hal_common.h"
#include "al_hal_pcie.h"
#include "al_hal_iofic.h"

/**
 * @defgroup group_pcie_interrupts PCIe interrupts
 * @ingroup grouppcie
 *  @{
 *  The PCIe interrupts HAL can be used to control PCIe unit interrupts.
 *  There are 5 groups of interrupts: app group A, B, C, D and AXI.
 *  Only 2 interrupts go from the pcie unit to the GIC:
 *  1. Summary for all the int groups (AXI+APP CORE).
 *  2. INTA assert/deassert (RC only).
 *  For the specific GIC interrupt line, please check the architecture reference
 *  manual.
 *  The reset mask state of all interrupts is: Masked
 *
 * @file   al_hal_pcie_interrupts.h
 *
 */

/**
 * PCIe interrupt groups
 */
enum al_pcie_int_group {
	AL_PCIE_INT_GRP_A,
	AL_PCIE_INT_GRP_B,
	AL_PCIE_INT_GRP_C, /* Rev3 only */
	AL_PCIE_INT_GRP_D, /* Rev3 only */
	AL_PCIE_INT_GRP_AXI_A,
};

/**
 * App group A interrupts mask - don't change
 * All interrupts not listed below should be masked
 */
enum al_pcie_app_int_grp_a {
	/** [RC only] Deassert_INTD received */
	AL_PCIE_APP_INT_DEASSERT_INTD = AL_BIT(0),
	/** [RC only] Deassert_INTC received */
	AL_PCIE_APP_INT_DEASSERT_INTC = AL_BIT(1),
	/** [RC only] Deassert_INTB received */
	AL_PCIE_APP_INT_DEASSERT_INTB = AL_BIT(2),
	/**
	 * [RC only] Deassert_INTA received - there's a dedicated GIC interrupt
	 * line that reflects the status of ASSERT/DEASSERT of INTA
	 */
	AL_PCIE_APP_INT_DEASSERT_INTA = AL_BIT(3),
	/** [RC only] Assert_INTD received */
	AL_PCIE_APP_INT_ASSERT_INTD = AL_BIT(4),
	/** [RC only] Assert_INTC received */
	AL_PCIE_APP_INT_ASSERT_INTC = AL_BIT(5),
	/** [RC only] Assert_INTB received */
	AL_PCIE_APP_INT_ASSERT_INTB = AL_BIT(6),
	/**
	 * [RC only] Assert_INTA received - there's a dedicated GIC interrupt
	 * line that reflects the status of ASSERT/DEASSERT of INTA
	 */
	AL_PCIE_APP_INT_ASSERT_INTA = AL_BIT(7),
	/** [RC only] MSI Controller Interrupt */
	AL_PCIE_APP_INT_MSI_CNTR_RCV_INT = AL_BIT(8),
	/** [EP only] MSI sent grant */
	AL_PCIE_APP_INT_MSI_TRNS_GNT = AL_BIT(9),
	/** [RC only] System error detected  (ERR_COR, ERR_FATAL, ERR_NONFATAL) */
	AL_PCIE_APP_INT_SYS_ERR_RC = AL_BIT(10),
	/** [EP only] Software initiates FLR on a Physical Function */
	AL_PCIE_APP_INT_FLR_PF_ACTIVE = AL_BIT(11),
	/** [RC only] Root Error Command register assertion notification */
	AL_PCIE_APP_INT_AER_RC_ERR = AL_BIT(12),
	/** [RC only] Root Error Command register assertion notification With MSI or MSIX enabled */
	AL_PCIE_APP_INT_AER_RC_ERR_MSI = AL_BIT(13),
	/** [RC only] PME Status bit assertion in the Root Status register With INTA */
	AL_PCIE_APP_INT_PME_INT = AL_BIT(15),
	/** [RC only] PME Status bit assertion in the Root Status register With MSI or MSIX enabled */
	AL_PCIE_APP_INT_PME_MSI = AL_BIT(16),
	/** [RC/EP] The core assert link down event, whenever the link is going down */
	AL_PCIE_APP_INT_LINK_DOWN = AL_BIT(21),
	/** [EP only] When the EP gets a command to shut down, signal the software to block any new TLP. */
	AL_PCIE_APP_INT_PM_XTLH_BLOCK_TLP = AL_BIT(22),
	/** [RC/EP] PHY/MAC link up */
	AL_PCIE_APP_INT_XMLH_LINK_UP = AL_BIT(23),
	/** [RC/EP] Data link up */
	AL_PCIE_APP_INT_RDLH_LINK_UP = AL_BIT(24),
	/** [RC/EP] The LTSSM is in RCVRY_LOCK state. */
	AL_PCIE_APP_INT_LTSSM_RCVRY_STATE = AL_BIT(25),
	/**
	 * [RC/EP] CFG write transaction to the configuration space by the RC peer
	 * For RC the int/ will be set from DBI write (internal SoC write)]
	 */
	AL_PCIE_APP_INT_CFG_WR = AL_BIT(26),
	/** [EP only] CFG access in EP mode */
	AL_PCIE_APP_INT_CFG_ACCESS = AL_BIT(31),
};

/**
 * App group B interrupts mask - don't change
 * All interrupts not listed below should be masked
 */
enum al_pcie_app_int_grp_b {
	/** [RC only] PM_PME Message received */
	AL_PCIE_APP_INT_GRP_B_PM_PME_MSG_RCVD = AL_BIT(0),
	/** [RC only] PME_TO_Ack Message received */
	AL_PCIE_APP_INT_GRP_B_PME_TO_ACK_MSG_RCVD = AL_BIT(1),
	/** [EP only] PME_Turn_Off Message received */
	AL_PCIE_APP_INT_GRP_B_PME_TURN_OFF_MSG_RCVD = AL_BIT(2),
	/** [RC only] ERR_CORR Message received */
	AL_PCIE_APP_INT_GRP_B_CORR_ERR_MSG_RCVD = AL_BIT(3),
	/** [RC only] ERR_NONFATAL Message received */
	AL_PCIE_APP_INT_GRP_B_NON_FTL_ERR_MSG_RCVD = AL_BIT(4),
	/** [RC only] ERR_FATAL Message received */
	AL_PCIE_APP_INT_GRP_B_FTL_ERR_MSG_RCVD = AL_BIT(5),
	/**
	 * [RC/EP] Vendor Defined Message received
	 * Asserted when a vendor message is received (with no data), buffers 2
	 * messages only, and latch the headers in registers
	 */
	AL_PCIE_APP_INT_GRP_B_VNDR_MSG_A_RCVD = AL_BIT(6),
	/**
	 * [RC/EP] Vendor Defined Message received
	 * Asserted when a vendor message is received (with no data), buffers 2
	 * messages only, and latch the headers in registers
	 */
	AL_PCIE_APP_INT_GRP_B_VNDR_MSG_B_RCVD = AL_BIT(7),
	/** [EP only] Link Autonomous Bandwidth Status is updated */
	AL_PCIE_APP_INT_GRP_B_LNK_BW_UPD = AL_BIT(12),
	/** [EP only] Link Equalization Request bit in the Link Status 2 Register has been set */
	AL_PCIE_APP_INT_GRP_B_LNK_EQ_REQ = AL_BIT(13),
	/** [RC/EP] OB Vendor message request is granted by the PCIe core */
	AL_PCIE_APP_INT_GRP_B_OB_VNDR_MSG_REQ_GRNT = AL_BIT(14),
	/** [RC only] CPL timeout from the PCIe core indication */
	AL_PCIE_APP_INT_GRP_B_CPL_TO = AL_BIT(15),
	/** [RC/EP] Slave Response Composer Lookup Error */
	AL_PCIE_APP_INT_GRP_B_SLV_RESP_COMP_LKUP_ERR = AL_BIT(16),
	/** [RC/EP] Parity Error */
	AL_PCIE_APP_INT_GRP_B_PARITY_ERR = AL_BIT(17),
	/** [EP only] Speed change request */
	AL_PCIE_APP_INT_GRP_B_SPEED_CHANGE = AL_BIT(31),
};

/**
 * AXI interrupts mask - don't change
 * These are internal errors that can happen on the internal chip interface
 * between the PCIe port and the I/O Fabric over the AXI bus. The notion of
 * master and slave refer to the PCIe port master interface towards the I/O
 * Fabric (i.e. for inbound PCIe writes/reads toward the I/O Fabric), while the
 * slave interface refer to the I/O Fabric to PCIe port interface where the
 * internal chip DMAs and CPU cluster is initiating transactions.
 * All interrupts not listed below should be masked.
 */
enum al_pcie_axi_int {
	/** [RC/EP] Master Response Composer Lookup Error */
	AL_PCIE_AXI_INT_MSTR_RESP_COMP_LKUP_ERR = AL_BIT(0),
	/** [RC/EP] PARITY ERROR on the master data read channel */
	AL_PCIE_AXI_INT_PARITY_ERR_MSTR_DATA_RD_CHNL = AL_BIT(2),
	/** [RC/EP] PARITY ERROR on the slave addr read channel */
	AL_PCIE_AXI_INT_PARITY_ERR_SLV_ADDR_RD_CHNL = AL_BIT(3),
	/** [RC/EP] PARITY ERROR on the slave addr write channel */
	AL_PCIE_AXI_INT_PARITY_ERR_SLV_ADDR_WR_CHNL = AL_BIT(4),
	/** [RC/EP] PARITY ERROR on the slave data write channel */
	AL_PCIE_AXI_INT_PARITY_ERR_SLV_DATA_WR_CHNL = AL_BIT(5),
	/** [RC only] Software error: ECAM write request with invalid bus number */
	AL_PCIE_AXI_INT_ECAM_WR_REQ_INVLD_BUS_NUM = AL_BIT(7),
	/** [RC only] Software error: ECAM read request with invalid bus number */
	AL_PCIE_AXI_INT_ECAM_RD_REQ_INVLD_BUS_NUM = AL_BIT(8),
	/** [RC/EP] Read AXI completion has ERROR */
	AL_PCIE_AXI_INT_RD_AXI_COMPL_ERR = AL_BIT(11),
	/** [RC/EP] Write AXI completion has ERROR */
	AL_PCIE_AXI_INT_WR_AXI_COMPL_ERR = AL_BIT(12),
	/** [RC/EP] Read AXI completion has timed out */
	AL_PCIE_AXI_INT_RD_AXI_COMPL_TO = AL_BIT(13),
	/** [RC/EP] Write AXI completion has timed out */
	AL_PCIE_AXI_INT_WR_AXI_COMPL_TO = AL_BIT(14),
	/** [RC/EP] Parity error AXI domain */
	AL_PCIE_AXI_INT_AXI_DOM_PARITY_ERR = AL_BIT(15),
	/** [RC/EP] POS error interrupt */
	AL_PCIE_AXI_INT_POS_ERR = AL_BIT(16),
};

/**
 * @brief   Initialize and configure PCIe controller interrupts
 * 	    Doesn't change the mask state of the interrupts
 * 	    The reset mask state of all interrupts is: Masked
 *
 * @param   pcie_port pcie port handle
 */
void al_pcie_ints_config(struct al_pcie_port *pcie_port);

/**
 * Unmask PCIe app group interrupts
 * @param  pcie_port pcie_port pcie port handle
 * @param  int_group interrupt group
 * @param  int_mask  int_mask interrupts to unmask ('1' to unmask)
 */
void al_pcie_app_int_grp_unmask(
	struct al_pcie_port *pcie_port,
	enum al_pcie_int_group int_group,
	uint32_t int_mask);

/**
 * Mask PCIe app group interrupts
 * @param  pcie_port pcie_port pcie port handle
 * @param  int_group interrupt group
 * @param  int_mask  int_mask interrupts to unmask ('1' to mask)
 */
void al_pcie_app_int_grp_mask(
	struct al_pcie_port *pcie_port,
	enum al_pcie_int_group int_group,
	uint32_t int_mask);

/**
 * Clear the PCIe app group interrupt cause
 * @param  pcie_port pcie port handle
 * @param  int_group interrupt group
 * @param  int_cause interrupt cause
 */
void al_pcie_app_int_grp_cause_clear(
	struct al_pcie_port *pcie_port,
	enum al_pcie_int_group int_group,
	uint32_t int_cause);

/**
 * Read PCIe app group interrupt cause
 * @param  pcie_port pcie port handle
 * @param  int_group interrupt group
 * @return interrupt cause or 0 in case the group is not supported
 */
uint32_t al_pcie_app_int_grp_cause_read(
	struct al_pcie_port *pcie_port,
	enum al_pcie_int_group int_group);

#endif
/** @} end of group_pcie_interrupts group */