xref: /dpdk/drivers/common/sfc_efx/base/ef10_vpd.c (revision 672386c1e9e1f64f7aa3b1360ad22dc737ea8d72)

/* SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright(c) 2019-2021 Xilinx, Inc.
 * Copyright(c) 2009-2019 Solarflare Communications Inc.
 */

#include "efx.h"
#include "efx_impl.h"


#if EFSYS_OPT_VPD

#if EFX_OPTS_EF10()

#include "ef10_tlv_layout.h"

	__checkReturn		efx_rc_t
ef10_vpd_init(
	__in			efx_nic_t *enp)
{
	caddr_t svpd;
	size_t svpd_size;
	uint32_t pci_pf;
	uint32_t tag;
	efx_rc_t rc;

	EFSYS_ASSERT3U(enp->en_mod_flags, &, EFX_MOD_PROBE);
	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	if (enp->en_nic_cfg.enc_vpd_is_global) {
		tag = TLV_TAG_GLOBAL_STATIC_VPD;
	} else {
		pci_pf = enp->en_nic_cfg.enc_pf;
		tag = TLV_TAG_PF_STATIC_VPD(pci_pf);
	}

	/*
	 * The VPD interface exposes VPD resources from the combined static and
	 * dynamic VPD storage. As the static VPD configuration should *never*
	 * change, we can cache it.
	 */
	svpd = NULL;
	svpd_size = 0;
	rc = ef10_nvram_partn_read_tlv(enp,
	    NVRAM_PARTITION_TYPE_STATIC_CONFIG,
	    tag, &svpd, &svpd_size);
	if (rc != 0) {
		if (rc == EACCES) {
			/* Unprivileged functions cannot access VPD */
			goto out;
		}
		goto fail1;
	}

	if (svpd != NULL && svpd_size > 0) {
		if ((rc = efx_vpd_hunk_verify(svpd, svpd_size, NULL)) != 0)
			goto fail2;
	}

	enp->en_arch.ef10.ena_svpd = svpd;
	enp->en_arch.ef10.ena_svpd_length = svpd_size;

out:
	return (0);

fail2:
	EFSYS_PROBE(fail2);

	EFSYS_KMEM_FREE(enp->en_esip, svpd_size, svpd);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

	__checkReturn		efx_rc_t
ef10_vpd_size(
	__in			efx_nic_t *enp,
	__out			size_t *sizep)
{
	efx_rc_t rc;
	efx_nvram_info_t eni = { 0 };

	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	/*
	 * This function returns the total size the user should allocate
	 * for all VPD operations. We've already cached the static vpd,
	 * so we just need to return an upper bound on the dynamic vpd,
	 * which is the size of the DYNAMIC_CONFIG partition.
	 */
	if ((rc = efx_mcdi_nvram_info(enp,
		    NVRAM_PARTITION_TYPE_DYNAMIC_CONFIG, &eni)) != 0)
		goto fail1;

	*sizep = eni.eni_partn_size;

	return (0);

fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

	__checkReturn		efx_rc_t
ef10_vpd_read(
	__in			efx_nic_t *enp,
	__out_bcount(size)	caddr_t data,
	__in			size_t size)
{
	caddr_t dvpd;
	size_t dvpd_size;
	uint32_t pci_pf;
	uint32_t tag;
	efx_rc_t rc;

	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	if (enp->en_nic_cfg.enc_vpd_is_global) {
		tag = TLV_TAG_GLOBAL_DYNAMIC_VPD;
	} else {
		pci_pf = enp->en_nic_cfg.enc_pf;
		tag = TLV_TAG_PF_DYNAMIC_VPD(pci_pf);
	}

	if ((rc = ef10_nvram_partn_read_tlv(enp,
		    NVRAM_PARTITION_TYPE_DYNAMIC_CONFIG,
		    tag, &dvpd, &dvpd_size)) != 0)
		goto fail1;

	if (dvpd_size > size) {
		rc = ENOSPC;
		goto fail2;
	}
	if (dvpd != NULL)
		memcpy(data, dvpd, dvpd_size);

	/* Pad data with all-1s, consistent with update operations */
	memset(data + dvpd_size, 0xff, size - dvpd_size);

	if (dvpd != NULL)
		EFSYS_KMEM_FREE(enp->en_esip, dvpd_size, dvpd);

	return (0);

fail2:
	EFSYS_PROBE(fail2);

	if (dvpd != NULL)
		EFSYS_KMEM_FREE(enp->en_esip, dvpd_size, dvpd);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

	__checkReturn		efx_rc_t
ef10_vpd_verify(
	__in			efx_nic_t *enp,
	__in_bcount(size)	caddr_t data,
	__in			size_t size)
{
	efx_vpd_tag_t stag;
	efx_vpd_tag_t dtag;
	efx_vpd_keyword_t skey;
	efx_vpd_keyword_t dkey;
	unsigned int scont;
	unsigned int dcont;
	efx_rc_t rc;

	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	/*
	 * Strictly you could take the view that dynamic vpd is optional.
	 * Instead, to conform more closely to the read/verify/reinit()
	 * paradigm, we require dynamic vpd. ef10_vpd_reinit() will
	 * reinitialize it as required.
	 */
	if ((rc = efx_vpd_hunk_verify(data, size, NULL)) != 0)
		goto fail1;

	/*
	 * Verify that there is no duplication between the static and
	 * dynamic cfg sectors.
	 */
	if (enp->en_arch.ef10.ena_svpd_length == 0)
		goto done;

	dcont = 0;
	_NOTE(CONSTANTCONDITION)
	while (1) {
		if ((rc = efx_vpd_hunk_next(data, size, &dtag,
		    &dkey, NULL, NULL, &dcont)) != 0)
			goto fail2;
		if (dcont == 0)
			break;

		/*
		 * Skip the RV keyword. It should be present in both the static
		 * and dynamic cfg sectors.
		 */
		if (dtag == EFX_VPD_RO && dkey == EFX_VPD_KEYWORD('R', 'V'))
			continue;

		scont = 0;
		_NOTE(CONSTANTCONDITION)
		while (1) {
			if ((rc = efx_vpd_hunk_next(
			    enp->en_arch.ef10.ena_svpd,
			    enp->en_arch.ef10.ena_svpd_length, &stag, &skey,
			    NULL, NULL, &scont)) != 0)
				goto fail3;
			if (scont == 0)
				break;

			if (stag == dtag && skey == dkey) {
				rc = EEXIST;
				goto fail4;
			}
		}
	}

done:
	return (0);

fail4:
	EFSYS_PROBE(fail4);
fail3:
	EFSYS_PROBE(fail3);
fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

	__checkReturn		efx_rc_t
ef10_vpd_reinit(
	__in			efx_nic_t *enp,
	__in_bcount(size)	caddr_t data,
	__in			size_t size)
{
	boolean_t wantpid;
	efx_rc_t rc;

	/*
	 * Only create an ID string if the dynamic cfg doesn't have one
	 */
	if (enp->en_arch.ef10.ena_svpd_length == 0)
		wantpid = B_TRUE;
	else {
		unsigned int offset;
		uint8_t length;

		rc = efx_vpd_hunk_get(enp->en_arch.ef10.ena_svpd,
				    enp->en_arch.ef10.ena_svpd_length,
				    EFX_VPD_ID, 0, &offset, &length);
		if (rc == 0)
			wantpid = B_FALSE;
		else if (rc == ENOENT)
			wantpid = B_TRUE;
		else
			goto fail1;
	}

	if ((rc = efx_vpd_hunk_reinit(data, size, wantpid)) != 0)
		goto fail2;

	return (0);

fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

	__checkReturn		efx_rc_t
ef10_vpd_get(
	__in			efx_nic_t *enp,
	__in_bcount(size)	caddr_t data,
	__in			size_t size,
	__inout			efx_vpd_value_t *evvp)
{
	unsigned int offset;
	uint8_t length;
	efx_rc_t rc;

	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	/* Attempt to satisfy the request from svpd first */
	if (enp->en_arch.ef10.ena_svpd_length > 0) {
		if ((rc = efx_vpd_hunk_get(enp->en_arch.ef10.ena_svpd,
		    enp->en_arch.ef10.ena_svpd_length, evvp->evv_tag,
		    evvp->evv_keyword, &offset, &length)) == 0) {
			evvp->evv_length = length;
			memcpy(evvp->evv_value,
			    enp->en_arch.ef10.ena_svpd + offset, length);
			return (0);
		} else if (rc != ENOENT)
			goto fail1;
	}

	/* And then from the provided data buffer */
	if ((rc = efx_vpd_hunk_get(data, size, evvp->evv_tag,
	    evvp->evv_keyword, &offset, &length)) != 0) {
		if (rc == ENOENT)
			return (rc);
		goto fail2;
	}

	evvp->evv_length = length;
	memcpy(evvp->evv_value, data + offset, length);

	return (0);

fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

	__checkReturn		efx_rc_t
ef10_vpd_set(
	__in			efx_nic_t *enp,
	__in_bcount(size)	caddr_t data,
	__in			size_t size,
	__in			efx_vpd_value_t *evvp)
{
	efx_rc_t rc;

	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	/* If the provided (tag,keyword) exists in svpd, then it is readonly */
	if (enp->en_arch.ef10.ena_svpd_length > 0) {
		unsigned int offset;
		uint8_t length;

		if ((rc = efx_vpd_hunk_get(enp->en_arch.ef10.ena_svpd,
		    enp->en_arch.ef10.ena_svpd_length, evvp->evv_tag,
		    evvp->evv_keyword, &offset, &length)) == 0) {
			rc = EACCES;
			goto fail1;
		}
	}

	if ((rc = efx_vpd_hunk_set(data, size, evvp)) != 0)
		goto fail2;

	return (0);

fail2:
	EFSYS_PROBE(fail2);
fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

	__checkReturn		efx_rc_t
ef10_vpd_next(
	__in			efx_nic_t *enp,
	__in_bcount(size)	caddr_t data,
	__in			size_t size,
	__out			efx_vpd_value_t *evvp,
	__inout			unsigned int *contp)
{
	_NOTE(ARGUNUSED(enp, data, size, evvp, contp))

	return (ENOTSUP);
}

	__checkReturn		efx_rc_t
ef10_vpd_write(
	__in			efx_nic_t *enp,
	__in_bcount(size)	caddr_t data,
	__in			size_t size)
{
	size_t vpd_length;
	uint32_t pci_pf;
	uint32_t tag;
	efx_rc_t rc;

	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	if (enp->en_nic_cfg.enc_vpd_is_global) {
		tag = TLV_TAG_GLOBAL_DYNAMIC_VPD;
	} else {
		pci_pf = enp->en_nic_cfg.enc_pf;
		tag = TLV_TAG_PF_DYNAMIC_VPD(pci_pf);
	}

	/* Determine total length of new dynamic VPD */
	if ((rc = efx_vpd_hunk_length(data, size, &vpd_length)) != 0)
		goto fail1;

	/* Store new dynamic VPD in all segments in DYNAMIC_CONFIG partition */
	if ((rc = ef10_nvram_partn_write_segment_tlv(enp,
		    NVRAM_PARTITION_TYPE_DYNAMIC_CONFIG,
		    tag, data, vpd_length, B_TRUE)) != 0) {
		goto fail2;
	}

	return (0);

fail2:
	EFSYS_PROBE(fail2);

fail1:
	EFSYS_PROBE1(fail1, efx_rc_t, rc);

	return (rc);
}

				void
ef10_vpd_fini(
	__in			efx_nic_t *enp)
{
	EFSYS_ASSERT(EFX_FAMILY_IS_EF10(enp));

	if (enp->en_arch.ef10.ena_svpd_length > 0) {
		EFSYS_KMEM_FREE(enp->en_esip, enp->en_arch.ef10.ena_svpd_length,
				enp->en_arch.ef10.ena_svpd);

		enp->en_arch.ef10.ena_svpd = NULL;
		enp->en_arch.ef10.ena_svpd_length = 0;
	}
}

#endif	/* EFX_OPTS_EF10() */

#endif	/* EFSYS_OPT_VPD */