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soc/fsl/qbman: Use shared-dma-pool for QMan private memory allocations

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Use the shared-memory-pool mechanism for frame queue descriptor and
packed frame descriptor record area allocations.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
This commit is contained in:
Roy Pledge 2017-09-18 16:39:38 -04:00 committed by Li Yang
parent 5ae783c6a1
commit 07f86917a4
3 changed files with 63 additions and 34 deletions
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93
drivers/soc/fsl/qbman/qman_ccsr.c
View File

@ -401,21 +401,42 @@ static int qm_init_pfdr(struct device *dev, u32 pfdr_start, u32 num)
}
/*
* Ideally we would use the DMA API to turn rmem->base into a DMA address
* (especially if iommu translations ever get involved). Unfortunately, the
* DMA API currently does not allow mapping anything that is not backed with
* a struct page.
* QMan needs two global memory areas initialized at boot time:
* 1) FQD: Frame Queue Descriptors used to manage frame queues
* 2) PFDR: Packed Frame Queue Descriptor Records used to store frames
* Both areas are reserved using the device tree reserved memory framework
* and the addresses and sizes are initialized when the QMan device is probed
*/
static dma_addr_t fqd_a, pfdr_a;
static size_t fqd_sz, pfdr_sz;
#ifdef CONFIG_PPC
/*
* Support for PPC Device Tree backward compatibility when compatible
* string is set to fsl-qman-fqd and fsl-qman-pfdr
*/
static int zero_priv_mem(phys_addr_t addr, size_t sz)
{
/* map as cacheable, non-guarded */
void __iomem *tmpp = ioremap_prot(addr, sz, 0);
if (!tmpp)
return -ENOMEM;
memset_io(tmpp, 0, sz);
flush_dcache_range((unsigned long)tmpp,
(unsigned long)tmpp + sz);
iounmap(tmpp);
return 0;
}
static int qman_fqd(struct reserved_mem *rmem)
{
fqd_a = rmem->base;
fqd_sz = rmem->size;
WARN_ON(!(fqd_a && fqd_sz));
return 0;
}
RESERVEDMEM_OF_DECLARE(qman_fqd, "fsl,qman-fqd", qman_fqd);
@ -431,32 +452,13 @@ static int qman_pfdr(struct reserved_mem *rmem)
}
RESERVEDMEM_OF_DECLARE(qman_pfdr, "fsl,qman-pfdr", qman_pfdr);
#endif
static unsigned int qm_get_fqid_maxcnt(void)
{
return fqd_sz / 64;
}
/*
* Flush this memory range from data cache so that QMAN originated
* transactions for this memory region could be marked non-coherent.
*/
static int zero_priv_mem(struct device *dev, struct device_node *node,
phys_addr_t addr, size_t sz)
{
/* map as cacheable, non-guarded */
void __iomem *tmpp = ioremap_prot(addr, sz, 0);
if (!tmpp)
return -ENOMEM;
memset_io(tmpp, 0, sz);
flush_dcache_range((unsigned long)tmpp,
(unsigned long)tmpp + sz);
iounmap(tmpp);
return 0;
}
static void log_edata_bits(struct device *dev, u32 bit_count)
{
u32 i, j, mask = 0xffffffff;
@ -727,10 +729,41 @@ static int fsl_qman_probe(struct platform_device *pdev)
qm_channel_caam = QMAN_CHANNEL_CAAM_REV3;
}
ret = zero_priv_mem(dev, node, fqd_a, fqd_sz);
WARN_ON(ret);
if (ret)
return -ENODEV;
if (fqd_a) {
#ifdef CONFIG_PPC
/*
* For PPC backward DT compatibility
* FQD memory MUST be zero'd by software
*/
zero_priv_mem(fqd_a, fqd_sz);
#else
WARN(1, "Unexpected architecture using non shared-dma-mem reservations");
#endif
} else {
/*
* Order of memory regions is assumed as FQD followed by PFDR
* in order to ensure allocations from the correct regions the
* driver initializes then allocates each piece in order
*/
ret = qbman_init_private_mem(dev, 0, &fqd_a, &fqd_sz);
if (ret) {
dev_err(dev, "qbman_init_private_mem() for FQD failed 0x%x\n",
ret);
return -ENODEV;
}
}
dev_dbg(dev, "Allocated FQD 0x%llx 0x%zx\n", fqd_a, fqd_sz);
if (!pfdr_a) {
/* Setup PFDR memory */
ret = qbman_init_private_mem(dev, 1, &pfdr_a, &pfdr_sz);
if (ret) {
dev_err(dev, "qbman_init_private_mem() for PFDR failed 0x%x\n",
ret);
return -ENODEV;
}
}
dev_dbg(dev, "Allocated PFDR 0x%llx 0x%zx\n", pfdr_a, pfdr_sz);
ret = qman_init_ccsr(dev);
if (ret) {

2
drivers/soc/fsl/qbman/qman_priv.h
View File

@ -28,8 +28,6 @@
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include "dpaa_sys.h"
#include <soc/fsl/qman.h>

2
drivers/soc/fsl/qbman/qman_test.h
View File

@ -30,7 +30,5 @@
#include "qman_priv.h"
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
int qman_test_stash(void);
int qman_test_api(void);